WORK MACHINE

Abstract

A work machine comprises a vehicular body having a first foothold and a traveling apparatus attached to the vehicular body. The traveling apparatus has a crawler belt. The first foothold is disposed above the crawler belt and has a working deck. The vehicular body is provided with at least one liquid replenishing port (e.g., at least one of a first liquid replenishing port, a second liquid replenishing port, and a third liquid replenishing port). In a top view of the work machine, at least one liquid replenishing port is disposed in an area of the vehicular body inner than the working deck.

Description

TECHNICAL FIELD

The present disclosure relates to a work machine.

BACKGROUND ART

U.S. Pat. No. 10,947,696 (PTL 1) discloses an excavator having a walkway system leading to a door of an operator cabin.

CITATION LIST

Patent Literature

PTL 1: U.S. Pat. No. 10,947,696

SUMMARY OF INVENTION

Technical Problem

In order to use a work machine, a maintenance work such as an operation of replenishing the work machine with fuel is required. An object of the present disclosure is to provide a work machine allowing an efficient maintenance work.

Solution to Problem

The presently disclosed work machine comprises a vehicular body having a first foothold and a traveling apparatus attached to the vehicular body. The traveling apparatus has a crawler belt. The first foothold is disposed above the crawler belt and has a working deck. The vehicular body is provided with at least one liquid replenishing port. In a top view of the work machine, at least one liquid replenishing port is disposed in an area of the vehicular body inner than the working deck.

Advantageous Effects of Invention

The presently disclosed work machine allows an efficient maintenance work.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a schematic left side view of an excavator according to an embodiment.

FIG. 2 is a schematic, partially enlarged left side view of the excavator according to the embodiment.

FIG. 3 is a schematic top view of the excavator according to the embodiment.

FIG. 4 is a schematic, partially enlarged top view of the excavator according to the embodiment.

FIG. 5 is a schematic rear view of the excavator according to the embodiment.

FIG. 6 is a schematic, partially enlarged left rear perspective view of the excavator according to the embodiment.

FIG. 7 is a schematic, partially enlarged left side view of the excavator according to the embodiment.

FIG. 8 is a schematic rear view of the excavator according to the embodiment.

DESCRIPTION OF EMBODIMENTS

Hereinafter, an embodiment of the present disclosure will be described in detail with reference to the accompanying drawings. In the specification and drawings, identical or corresponding components are identically denoted and will not be described redundantly. In the drawings, some configuration may be omitted or simplified for convenience of description.

In the present embodiment, a positional relationship of each part will be described with reference to an operator seated on an operator's seat (not shown) in a cab 12. A frontward/rearward direction of a work machine 1 or that of a vehicular body 2 refers to a direction frontwardly/rearwardly of the operator seated on the operator's seat. A rightward/leftward direction of work machine 1 or a widthwise direction of vehicular body 2 (a vehicular widthwise direction) refers to a direction rightwardly/leftwardly of the operator seated on the operator's seat. An upward/downward direction of work machine 1 or that of vehicular body 2 refers to a direction upwardly/downwardly of the operator seated on the operator's seat.

A direction facing the operator seated on the operator's seat is the frontward direction, and a direction opposite to the frontward direction is the rearward direction. A right side and a left side when the operator seated on the operator's seat faces front are defined as the rightward direction and the leftward direction, respectively. A side closer to the feet of the operator seated on the operator's seat is a lower side and a side closer to the head of the operator seated on the operator's seat is an upper side.

Configuration of Work Machine 1

Referring to FIGS. 1 to 8, a configuration of an excavator will be described as an example of work machine 1 according to an embodiment of the present disclosure. Work machine 1 of the present disclosure is not limited to an excavator and may be a pipe layer.

As shown in FIGS. 1 and 2, work machine 1 comprises vehicular body 2, a traveling apparatus 35, a work implement 4 serving as a front work implement, and a hydraulic system (not shown). Work machine 1 may further comprise a climbing device 7. Work machine 1 may further comprise a ripper apparatus 8 as a rear work implement.

Vehicular body 2 includes a first foothold 5, a second foothold 6, a vehicular body frame 11, cab (an operator's cab) 12, an engine compartment 16, an engine (not shown), an exhaust gas post-treatment device (not shown), a fuel tank (not shown), an oil pan (not shown) for a lubricating oil for a power line, a reducing agent tank (not shown), and an air conditioning unit 27.

Vehicular body frame 11 is disposed under cab 12 and supports cab 12. Cab 12 is disposed at an upper rear portion of vehicular body 2. Inside cab 12 are provided a driver's seat (not shown) on which an operator sits, an operating device (not shown) for operating work machine 1, and a meter (not shown). Examples of the operating device include steering, a lever, and a pedal. The meter for example includes a meter indicating a residual amount of fuel, a meter indicating a residual amount of hydraulic oil, a meter indicating a residual amount of a reducing agent, etc. An entrance and exit 13 for an operator to enter/exit cab 12 is provided to cab 12. Entrance and exit 13 may be provided with a door. The door can open and close entrance and exit 13.

As shown in FIG. 5, cab 12 is provided with a window. Vehicular body 2 is provided with a wiper for wiping a window. For example, a wiper 30 is provided to rear window 15. Wiper 30 includes wiper rubber 31 and an arm 32. Wiper rubber 31 is attached to arm 32. Arm 32 moves wiper rubber 31. Wiper rubber 31 comes into contact with rear window 15 to wipe rear window 15.

As shown in FIG. 1, air conditioning unit 27 conditions air inside cab 12. Air conditioning unit 27 is installed on cab 12 of vehicular body 2. Air conditioning unit 27 projects rearward from cab 12, for example. As shown in FIG. 5, air conditioning unit 27 is disposed above rear window 15. Air conditioning unit 27 is provided with an air filter 29. Specifically, air conditioning unit 27 is provided with a filter attachment 28. Air filter 29 is inserted into filter attachment 28. Air filter 29 removes dust contained in external air taken into cab 12 by air conditioning unit 27. Air filter 29 is formed for example of a nonwoven fabric sheet. Alternatively, air filter 29 may be a cartridge-shaped component.

As shown in FIG. 1, engine compartment 16 is disposed in front of cab 12. The engine (not shown) is accommodated in engine compartment 16. The engine is for example a diesel engine. The engine for example generates a driving force to drive traveling apparatus 35, the hydraulic system (not shown), and the like. The hydraulic system for example includes a hydraulic motor (not shown) and a hydraulic mechanism (not shown). The engine drives traveling apparatus 35 via the power line. Specifically, the driving force of the engine is transmitted via a torque converter, a transmission, steering, a final reduction gear, a sprocket (a drive wheel), and the like to crawler belts 36 and 37 (FIG. 3) and thus drives traveling apparatus 35. The engine drives work implement 4, ripper apparatus 8, and the like via the hydraulic system. Specifically, work implement 4, ripper apparatus 8, and the like are driven by operating the hydraulic mechanism by the driving force of the engine.

The exhaust gas post-treatment device (not shown) is for example a selective catalytic reduction device. The selective catalytic reduction device is accommodated in engine compartment 16. The selective catalytic reduction device employs a reducing agent to treat gas exhausted from the engine. The selective catalytic reduction device reduces nitrogen oxide (NOx) contained in the gas exhausted from the engine. The reducing agent is for example urea water.

Vehicular body 2 is provided with a first liquid replenishing port 20. First liquid replenishing port 20 is provided with a first cap 21 capable of opening and closing first liquid replenishing port 20. First liquid replenishing port 20 is for example a port for replenishing work machine 1 with fuel. First liquid replenishing port 20 communicates with the fuel tank (not shown). For example, a maintenance worker opens first cap 21 when replenishing work machine 1 (or the fuel tank) with fuel. The maintenance worker connects a hose (not shown) to first liquid replenishing port 20. Through the hose, the fuel is supplied via first liquid replenishing port 20 to the fuel tank. Once the maintenance worker has finished replenishing work machine 1 (or the fuel tank) with fuel, the maintenance worker closes first cap 21. The fuel is stored in the fuel tank. The fuel is supplied from the fuel tank to the engine.

Vehicular body 2 is provided with a second liquid replenishing port 22. Second liquid replenishing port 22 is provided with a second cap 23 capable of opening and closing second liquid replenishing port 22. Second liquid replenishing port 22 is for example a replenishing port for a reducing agent for the selective catalytic reduction device that is the exhaust gas post-treatment device of work machine 1. Second liquid replenishing port 22 communicates with the reducing agent tank (not shown). For example, the maintenance worker opens second cap 23 when replenishing work machine 1 (or the reducing agent tank) with the reducing agent. The maintenance worker pours the reducing agent into second liquid replenishing port 22 from a container (not shown) containing the reducing agent. The container is for example a plastic container such as a bag-in-box (BIB). Once the maintenance worker has finished replenishing work machine 1 (or the reducing agent tank) with the reducing agent, the maintenance worker closes second cap 23. The reducing agent is stored in the reducing agent tank. The reducing agent is supplied from the reducing agent tank to the selective catalytic reduction device. Note that second liquid replenishing port 22 may be a replenishing port for replenishing a hydraulic oil tank with hydraulic oil.

Vehicular body 2 is provided with a third liquid replenishing port 24. Third liquid replenishing port 24 is provided with a third cap 25 capable of opening and closing third liquid replenishing port 24. Third liquid replenishing port 24 is for example a replenishing port for a lubricating oil for a power line. Third liquid replenishing port 24 communicates with an oil pan (not shown) for the lubricating oil for the power line. For example, the maintenance worker opens third cap 25 when replenishing work machine 1 (or the oil pan for the lubricating oil for the power line) with the lubricating oil. The maintenance worker pours the lubricating oil into third liquid replenishing port 24 from a container (not shown) containing the lubricating oil. The container is for example a container such as an 18-liter can. Once the maintenance worker has finished replenishing work machine 1 (or the oil pan for the lubricating oil for the power line) with the lubricating oil, the maintenance worker closes third cap 25. The lubricating oil is stored in the oil pan for the lubricating oil for the power line. The lubricating oil is supplied from the oil pan for the lubricating oil for the power line to the power line (or a power transmission device) including the engine, a power system device, and a hydraulic pressure-related device.

First liquid replenishing port 20 may have a position and/or a height different from those of second and third liquid replenishing ports 22 and 24. This can significantly reduce erroneous maintenance, that is, erroneous liquid replenishment. Further, changing first, second and third liquid replenishing ports 20, 22 and 24 in position and/or height depending on the type of the liquid that the work machine is replenished with, further facilitates maintenance.

Traveling apparatus 35 is attached to vehicular body 2. Specifically, traveling apparatus 35 is attached on both right and left sides of vehicular body frame 11. Traveling apparatus 35 supports vehicular body 2. Specifically, traveling apparatus 35 supports vehicular body frame 11. Traveling apparatus 35 includes a pair of crawler belts 36 and 37 separated from each other in the vehicular widthwise direction. Each crawler belt 36, 37 is wound on a sprocket (a drive wheel) and an idler wheel (an idler). Along the power line, the driving force of the engine is transmitted via the torque converter, the transmission, the steering, the final reduction gear, the sprocket (the drive wheel), and the like to crawler belts 36 and 37 and thus causes work machine 1 to travel.

Work implement 4 has a portion located in front of vehicular body 2. Work implement 4 includes a blade (a work tool) 40, a pair of right and left frames 41, a pair of right and left tilt cylinders 42, and a pair of right and left lift cylinders 43. Blade 40 is disposed in front of vehicular body 2. Blade 40 is rotatably supported with respect to each of the paired right and left frames 41. The paired right and left frames 41 are each rotatably supported with respect to vehicular body 2. Blade 40 is capable of a tilt operation or a pitch operation by the pair of right and left tilt cylinders 42. Specifically, when one of the paired right and left tilt cylinders 42 is stopped and the other is expanded, blade 40 has either one of its right and left ends moved upward with respect to the other to perform the tilt operation. Further, when the paired right and left tilt cylinders 42 are both caused to expand and contract, blade 40 tilts in the frontward/rearward direction to perform the pitch operation. Blade 40 moves in the upward/downward direction about a portion at which the paired right and left frames 41 are each supported by vehicular body 2 as the pair of right and left lift cylinders 43 expands and contracts. Tilt cylinder 42 and lift cylinder 43 are hydraulic cylinders and driven by a hydraulic system (not shown) including hydraulic oil.

Ripper apparatus 8 is a rear work implement disposed behind vehicular body 2. Ripper apparatus 8 is a work implement for piercing and crushing a hard material such as a rock. Ripper apparatus 8 includes a ripper 45 for crushing rocks and the like. Ripper apparatus 8 is driven by a hydraulic system (not shown) including hydraulic oil.

First Foothold 5

As shown in FIG. 3, vehicular body 2 has first foothold 5. First foothold 5 is disposed above one of the paired right and left crawler belts 36 and 37. In the present embodiment, first foothold 5 is disposed for example above crawler belt 36. First foothold 5 has a working deck 50. Working deck 50 is disposed for example at a left rear or right rear portion of vehicular body 2. In the present embodiment, working deck 50 is disposed for example at the left rear portion of vehicular body 2. Working deck 50 is disposed at a rear end of vehicular body 2. Therefore, a rear end of working deck 50 constitutes the rear end of vehicular body 2. A maintenance worker performs a maintenance work on working deck 50. The maintenance work for example includes an operation of replenishing the work machine with fuel through first liquid replenishing port 20, an operation of replenishing the work machine with a reducing agent through second liquid replenishing port 22, an operation of replenishing the work machine with a lubricating oil for the power line through third liquid replenishing port 24, an operation of replacing wiper rubber 31, and an operation of replacing air filter 29. The maintenance work may be at least one of these operations or may be at least two of these operations.

As shown in FIG. 4, in a top view of work machine 1, working deck 50 has an inner edge 51, a front edge 52, an outer edge 53 opposite to inner edge 51, and a rear edge 54 opposite to front edge 52. Inner edge 51 is one of the edges of working deck 50 that is closer to a widthwise center 9 of vehicular body 2 in the top view of work machine 1. Widthwise center 9 of vehicular body 2 is a center of vehicular body 2 in the vehicular widthwise direction, as will be described later. Front edge 52 is one of the edges of working deck 50 that is located in the frontward direction of work machine 1 in the top view of work machine 1. Front edge 52 may be an edge of working deck 50 closer to a lengthwise center 10 of vehicular body 2 in the top view of work machine 1. Lengthwise center 10 of vehicular body 2 is a center of vehicular body 2 in the frontward/rearward direction of work machine 1 (or vehicular body 2), as will be described later. Outer edge 53 is one of the edges of working deck 50 that is farther from widthwise center 9 of vehicular body 2 in the top view of work machine 1. Rear edge 54 is one of the edges of working deck 50 in the rearward direction of work machine 1 in the top view of work machine 1. Rear edge 54 may be an edge of working deck 50 that is farther from lengthwise center 10 of vehicular body 2 in the top view of work machine 1. Working deck 50 has a corner 55 formed by inner edge 51 of working deck 50 and front edge 52 of working deck 50.

In the vehicular widthwise direction, working deck 50 has a first width W₁ for example of 500 mm or more. Working deck 50 may have first width W₁ of 600 mm or more. Working deck 50 has a flat surface. Working deck 50 has the surface processed to prevent slippage. The anti-slip process is for example formation of bumps or adhesion of an anti-slip sheet.

First foothold 5 may further comprise a passageway 56. Passageway 56 extends from working deck 50 to second foothold 6 described later. Passageway 56 extends for example from front edge 52 of working deck 50 toward the front of work machine 1. The maintenance worker moves on passageway 56 from second foothold 6 or the driver's seat in cab 12 to working deck 50. First width W₁ of working deck 50 in the vehicular widthwise direction is larger than a second width W₂ of passageway 56 in the vehicular widthwise direction. Second width W₂ of passageway 56 in the vehicular widthwise direction is for example 300 mm or more.

First foothold 5 may further have an anti-fall structure 58 and an outer sidewall 57. In the present embodiment, as shown in FIG. 6, anti-fall structure 58 is for example a fence. Anti-fall structure 58 may be a wall, a wire rope, a chain, or the like. Anti-fall structure 58 is provided at working deck 50. Specifically, anti-fall structure 58 is provided at working deck 50 via outer sidewall 57. As shown in FIG. 3, anti-fall structure 58 is provided along outer edge 53. Anti-fall structure 58 may also be provided on passageway 56.

Second Foothold 6

As shown in FIG. 3, vehicular body 2 has second foothold 6. Second foothold 6 is disposed for example above crawler belt 36. Second foothold 6 is disposed in a vicinity of entrance and exit 13 of cab 12. Second foothold 6 is disposed closer to entrance and exit 13 of cab 12 than first foothold 5 is. The maintenance worker can access entrance and exit 13 or passageway 56 by frame 41, crawler belt 36, and second foothold 6.

Climbing Device 7

As shown in FIGS. 3 and 6, climbing device 7 helps the maintenance worker to access working deck 50. Climbing device 7 is disposed behind crawler belt 36 and working deck 50. Climbing Device 7 is disposed for example immediately behind working deck 50. Climbing Device 7 is attached to a rear end of vehicular body 2 that defines rear edge 54 of working deck 50. The maintenance worker accesses rear edge 54 of working deck 50 via climbing device 7. Climbing Device 7 is for example a ladder, steps, or an electric lift. In the present embodiment, climbing device 7 is foldable to be in a folded state shown in FIGS. 7 and 8. Climbing Device 7 can thus be prevented from interfering with an obstacle present outside work machine 1. Climbing Device 7 may have a handrail 71. Handrail 71 helps the maintenance worker to move on climbing device 7.

Arrangement of Liquid Replenishing Port and Member Subject to Maintenance

Work machine 1 is provided with at least one liquid replenishing port. At least one liquid replenishing port may be a single liquid replenishing port or a plurality of liquid replenishing ports. At least one liquid replenishing port for example includes first liquid replenishing port 20, second liquid replenishing port 22, and third liquid replenishing port 24. Work machine 1 may further be provided for example with wiper rubber 31 and air filter 29 as a member subject to maintenance.

As shown in FIG. 3, at least one liquid replenishing port (for example, at least one of first, second and third liquid replenishing ports 20, 22 and 24) is disposed in an area of vehicular body 2 inner than working deck 50 in the top view of work machine 1. The area of vehicular body 2 inner than working deck 50 is an area of vehicular body 2 closer to a center 2c of vehicular body 2 than working deck 50 is in the top view of work machine 1.

Specifically, the area of vehicular body 2 inner than working deck 50 is an area of vehicular body 2 in the top view of work machine 1 that is located within an area surrounded by widthwise center 9 of vehicular body 2, lengthwise center 10 of vehicular body 2, a virtual straight line extending in the vehicular widthwise direction in contact with an end of working deck 50 rearmost in the frontward/rearward direction, and a virtual straight line extending in the frontward/rearward direction in contact with an end of working deck 50 outermost in the vehicular widthwise direction.

The virtual straight line extending in the vehicular widthwise direction in contact with the end of working deck 50 rearmost in the frontward/rearward direction is the same for example as a virtual straight line 10b. Further, the virtual straight line extending in the frontward/rearward direction in contact with an end of working deck 50 leftmost in the vehicular widthwise direction is the same for example as a virtual straight line 9b.

Therefore, the area of vehicular body 2 inner than working deck 50 excludes in the top view of work machine 1 an area rearward of working deck 50 in the frontward/rearward direction (a side opposite to widthwise center 9 of vehicular body 2 with working deck 50 interposed) and an area outer than working deck 50 in the vehicular widthwise direction (a side opposite to lengthwise center 10 of vehicular body 2 with working deck 50 interposed).

Center 2c of vehicular body 2 in the above is a point at which widthwise center 9 and lengthwise center 10 intersect with each other in the top view of work machine 1.

Widthwise center 9 in the above is a virtual straight line in the top view of work machine 1 extending in the frontward/rearward direction at a center between a virtual straight line 9a extending in the frontward/rearward direction in contact with a rightmost end of vehicular body 2 and virtual straight line 9b extending in the frontward/rearward direction in contact with a leftmost end of vehicular body 2. Therefore, a distance L₃ between widthwise center 9 and virtual straight line 9a in the vehicular widthwise direction is equal to a distance L₄ between widthwise center 9 and virtual straight line 9b in the vehicular widthwise direction.

Lengthwise center 10 in the above is a virtual straight line in the top view of work machine 1 extending in the vehicular widthwise direction at a center between a virtual straight line 10a extending in the vehicular widthwise direction in contact with a frontmost end of vehicular body 2 and virtual straight line 10b extending in the vehicular widthwise direction in contact with a rearmost end of vehicular body 2. Therefore, a distance L₁ between lengthwise center 10 and virtual straight line 10a in the frontward/rearward direction is equal to a distance L₂ between lengthwise center 10 and virtual straight line 10b in the frontward/rearward direction.

In the top view of work machine 1, first, second and third liquid replenishing ports 20, 22 and 24 are disposed closer to working deck 50 than widthwise center 9 of vehicular body 2 is in the vehicular widthwise direction of vehicular body 2. In the top view of work machine 1, first, second and third liquid replenishing ports 20, 22 and 24 are disposed closer to working deck 50 than lengthwise center 10 of vehicular body 2 is.

In the top view of work machine 1, first liquid replenishing port 20 is opposed to working deck 50 (or inner edge 51) in the vehicular widthwise direction. First liquid replenishing port 20 opposed to working deck 50 (or inner edge 51) in the vehicular widthwise direction means that first liquid replenishing port 20 is disposed in an area in the top view of work machine 1 extending in the vehicular widthwise direction from inner edge 51 of working deck 50 to widthwise center 9 of vehicular body 2. In the top view of work machine 1, second liquid replenishing port 22 is opposed to working deck 50 (e.g., front edge 52) in the frontward/rearward direction of vehicular body 2. Second liquid replenishing port 22 opposed to working deck 50 (or front edge 52) in the frontward/rearward direction means that second liquid replenishing port 22 is disposed in an area in the top view of work machine 1 extending in the frontward/rearward direction from front edge 52 of working deck 50 to lengthwise center 10 of vehicular body 2. Thus disposing first liquid replenishing port 20 and second liquid replenishing port 22 in different directions with respect to working deck 50 (i.e., the vehicular widthwise direction and the frontward/rearward direction) can significantly reduce erroneous maintenance, that is, erroneous liquid replenishment by a maintenance worker.

In the top view of work machine 1, third liquid replenishing port 24 is disposed in an area sandwiched between first liquid replenishing port 20 and second liquid replenishing port 22.

In the top view of work machine 1, a center C1 of an opening of first liquid replenishing port 20, a center C2 of an opening of second liquid replenishing port 22, and a center C3 of an opening of third liquid replenishing port 24 are offset from one another in both the vehicular widthwise direction of vehicular body 2 and the frontward/rearward direction of vehicular body 2. This can significantly reduce erroneous maintenance, that is, erroneous liquid replenishment by a maintenance worker, and thus allows a maintenance work to be accurately performed.

In the top view of work machine 1, in a state with wiper 30 stopped, wiper rubber 31 is stopped to be closer in the vehicular widthwise direction to working deck 50 than widthwise center 9 of vehicular body 2 is. In the top view of work machine 1, air filter 29 is disposed to be closer in the vehicular widthwise direction to working deck 50 than widthwise center 9 of vehicular body 2 is. In the top view of work machine 1, air filter 29 and filter attachment 28 are opposed to working deck 50 (or inner edge 51) in the vehicular widthwise direction.

As shown in FIG. 4, in the top view of work machine 1, first, second and third liquid replenishing ports 20, 22 and 24 are disposed around working deck 50. For example, in the top view of work machine 1, first, second and third liquid replenishing ports 20, 22 and 24 are disposed at positions spaced from any one of inner edge 51 of working deck 50, front edge 52 of working deck 50, and corner 55 of working deck 50 by a distance (a distance d₁, a distance d₂, and a distance d₃) of 70 cm or less. The distance (distances d₁, d₂ and d₃) may be 60 cm or less, 50 cm or less, or 40 cm or less.

In the top view of work machine 1, first, second and third liquid replenishing ports 20, 22 and 24 are disposed in a first area 60 (a shaded area shown in FIG. 4). First area 60 is a sum of a first partial area 61, a second partial area 62, and a third partial area 63 described later.

Frequency of maintenance for replenishment with fuel may be of the same degree as frequency of maintenance for replenishment with a reducing agent. Disposing a plurality of liquid replenishing ports (first, second and third liquid replenishing ports 20, 22 and 24) in first area 60 allows a reduced maintenance period of time when the work machine is replenished with the fuel and the reducing agent at the same time. Further, disposing a member subject to maintenance in first area 60 allows a reduced maintenance period of time as a maintenance worker who replenishes the work machine can move a small distance to subject the member to maintenance.

In the top view of work machine 1, wiper rubber 31, air filter 29, and filter attachment 28 are disposed around working deck 50. For example, in the top view of work machine 1, wiper rubber 31, air filter 29, and filter attachment 28 are disposed at positions spaced from any one of inner edge 51 of working deck 50, front edge 52 of working deck 50, and corner 55 of working deck 50 by a distance (distance d₄ and distance d₅) of 70 cm or less. The distance (distances d₄ and d₅) may be 60 cm or less, 50 cm or less, or 40 cm or less. In the top view of work machine 1, wiper rubber 31, air filter 29, and filter attachment 28 are disposed in first area 60 (the shaded area shown in FIG. 4).

In the top view of work machine 1, first, second and third liquid replenishing ports 20, 22 and 24 may be disposed around corner 55 of working deck 50. In the top view of work machine 1, first, second and third liquid replenishing ports 20, 22 and 24 may be disposed in a second area 65. Second area 65 is defined as a sectoral area formed by an arc disposed at a position spaced by a distance D from corner 55 of working deck 50 and edges of working deck 50 in contact with the arc (e.g., inner edge 51 and front edge 52), except for passageway 56.

In the top view of work machine 1, wiper rubber 31, air filter 29, and filter attachment 28 may be disposed around corner 55 of working deck 50. In the top view of work machine 1, wiper rubber 31, air filter 29, and filter attachment 28 may be disposed in second area 65.

For example, in the top view of work machine 1, first liquid replenishing port 20 is disposed for example at a position spaced in the vehicular widthwise direction from working deck 50 (or inner edge 51) by distance d₁ of 70 cm or less. Distance d₁ is the shortest distance between first liquid replenishing port 20 and working deck 50 (or inner edge 51) in the vehicular widthwise direction. Distance d₁ may be 60 cm or less, 50 cm or less, or 40 cm or less. In the top view of work machine 1, at least a portion of first liquid replenishing port 20 is in first partial area 61. First partial area 61 is defined as an area between inner edge 51 of working deck 50 and a line spaced from inner edge 51 of working deck 50 in the vehicular widthwise direction toward widthwise center 9 of vehicular body 2 by distance D. Distance D may be 60 cm or less, 50 cm or less, or 40 cm or less.

In the top view of work machine 1, second liquid replenishing port 22 is disposed for example at a position spaced from working deck 50 (for example, front edge 52) in the frontward/rearward direction of vehicular body 2 by distance d₂ of 70 cm or less. Distance d₂ is the shortest distance between second liquid replenishing port 22 and working deck 50 (for example, front edge 52) in the frontward/rearward direction of vehicular body 2. Distance d₂ may be 60 cm or less, 50 cm or less, or 40 cm or less. In the top view of work machine 1, at least a portion of second liquid replenishing port 22 is in second partial area 62. Second partial area 62 is defined as an area between front edge 52 of working deck 50 and a line spaced from front edge 52 of working deck 50 in the frontward/rearward direction of vehicular body 2 toward lengthwise center 10 of vehicular body 2 by distance D. Distance D may be 60 cm or less, 50 cm or less, or 40 cm or less.

Third liquid replenishing port 24 is disposed at a position spaced from corner 55 of working deck 50 by distance d₃ of 70 cm or less in the top view of work machine 1. Distance d₃ is the shortest distance between third liquid replenishing port 24 and corner 55 of working deck 50 in the top view of work machine 1. Distance d₃ may be 60 cm or less, 50 cm or less, or 40 cm or less. In the top view of work machine 1, at least a portion of third liquid replenishing port 24 is in third partial area 63. Third partial area 63 is defined as a sectoral area surrounded by first partial area 61, second partial area 62, and an arc disposed at a position spaced from corner 55 of working deck 50 by distance D. Distance D may be 60 cm or less, 50 cm or less, or 40 cm or less.

In the top view of work machine 1, wiper rubber 31 is disposed at a position spaced from corner 55 of working deck 50 by distance d₄ of 70 cm or less. Distance d₄ is the shortest distance between wiper rubber 31 and corner 55 of working deck 50 in the top view of work machine 1. Distance d₄ may be 60 cm or less, 50 cm or less, or 40 cm or less. In the top view of work machine 1, wiper rubber 31 may be disposed in third partial area 63.

In the top view of work machine 1, air filter 29 and filter attachment 28 are disposed at a position spaced from working deck 50 (or inner edge 51) by a distance d₅ of 70 cm or less in the vehicular widthwise direction. Distance d₅ is the shortest distance between air filter 29 and working deck 50 (or inner edge 51) in the vehicular widthwise direction, or the shortest distance between filter attachment 28 and working deck 50 (or inner edge 51) in the vehicular widthwise direction. Distance d₅ may be 60 cm or less, 50 cm or less, or 40 cm or less. In the top view of work machine 1, air filter 29 and filter attachment 28 may be disposed in first partial area 61.

As shown in FIG. 5, first liquid replenishing port 20 is disposed at a height h₁ of 70 cm or less from a floor surface of working deck 50. Height h₁ is a minimum height between first liquid replenishing port 20 and the floor surface of working deck 50 in the upward/downward direction of work machine 1. Height h₁ may be 60 cm or less. Height h₁ may be 40 cm or more.

Second liquid replenishing port 22 is disposed at a height h₂ of 70 cm or less from the floor surface of working deck 50. Height h₂ is a minimum height between second liquid replenishing port 22 and the floor surface of working deck 50 in the upward/downward direction of work machine 1. Height h₂ may be 60 cm or less. Height h₂ may be 40 cm or more.

Third liquid replenishing port 24 is disposed at a height h₃ of 70 cm or less from the floor surface of working deck 50. Height h₃ is a minimum height between third liquid replenishing port 24 and the floor surface of working deck 50 in the upward/downward direction of work machine 1. Height h₃ may be 60 cm or less. Height h₃ may be 40 cm or more.

Wiper rubber 31 is disposed at a height h₄ of 200 cm or less from the floor surface of working deck 50. Height h₄ is a minimum height between wiper rubber 31 and the floor surface of working deck 50 in the upward/downward direction of work machine 1. Height h₄ may be 180 cm or less, 150 cm or less, 120 cm or less, 100 cm or less, or 80 cm or less. Height h₄ may be higher than height h₁, higher than height h₂, or higher than height h₃.

Air filter 29 or filter attachment 28 is disposed at a height h₅ of 200 cm or less from the floor surface of working deck 50. Height h₅ is a minimum height between air filter 29 or filter attachment 28 and the floor surface of working deck 50 in the upward/downward direction of work machine 1. Height h₅ may be 180 cm or less, 150 cm or less, 120 cm or less, 100 cm or less, or 80 cm or less. Height h₅ may be higher than height h₁, higher than height h₂, or higher than height h₃.

In the FIG. 8 configuration, an outer end 5e of first foothold 5 most distant from widthwise center 9 of vehicular body 2 in the vehicular widthwise direction is located on the side of (or closer to) widthwise center 9 of vehicular body 2 than an outer end of work machine 1 most distant from widthwise center 9 of vehicular body 2 in the vehicular widthwise direction is.

The outer end of work machine 1 may be an outer end 40e of blade 40 or may be an outer end 35e of traveling apparatus 35. In the present embodiment, the outer end of work machine 1 is for example outer end 40e of blade 40. Therefore, outer end 5e of first foothold 5 is located on the side of (or closer to) widthwise center 9 of vehicular body 2 than outer end 40e of blade 40 is. When the outer end of work machine 1 is outer end 35e of traveling apparatus 35, outer end 5e of first foothold 5 is located on the side of (or closer to) widthwise center 9 of vehicular body 2 than outer end 35e of traveling apparatus 35 is.

In the present embodiment and an exemplary variation, an example has been described in which work machine 1 comprises cab 12 and an operator comes aboard cab 12, that is, the work machine is a manned vehicle. Work machine 1 may be an unmanned vehicle. Work machine 1 may not comprise cab 12 for the operator to come aboard and operate the excavator. Work machine 1 may not be equipped with a function for operation by the operator aboard. Work machine 1 may be an exclusively remotely operated work machine. Work machine 1 may be operated in response to a radio signal received from a remote control device.

Effects of the present embodiment will be described.

Work machine 1 of the present embodiment comprises vehicular body 2 having first foothold 5, and traveling apparatus 35 attached to vehicular body 2. Traveling apparatus 35 includes a pair of crawler belts 36 and 37. First foothold 5 is disposed above crawler belt 36 and has working deck 50. Vehicular body 2 is provided with at least one liquid replenishing port (for example, at least one of first, second and third liquid replenishing ports 20, 22 and 24). In a top view of work machine 1, at least one liquid replenishing port is disposed in an area of vehicular body 2 inner than working deck 50.

It should be noted that at least one liquid replenishing port disposed in the area of vehicular body 2 inner than working deck 50 is not limited to first, second and third liquid replenishing ports 20, 22 and 24, and may be another liquid replenishing port. Further, at least one liquid replenishing port disposed in the inner area of vehicular body 2 suffices, and either a single liquid replenishing port or a plurality of liquid replenishing ports may be disposed in the inner area of vehicular body 2.

A maintenance worker can perform a maintenance work for at least one liquid replenishing port (for example, at least one of first, second and third liquid replenishing ports 20, 22 and 24) on working deck 50 that allows the maintenance worker to keep his/her footing. For example, the maintenance worker can perform a maintenance work of replenishing the work machine with a first liquid (for example, fuel for work machine 1) through first liquid replenishing port 20 on working deck 50 that allows the maintenance worker to keep his/her footing. The maintenance worker can thus easily perform the maintenance work for work machine 1. Work machine 1 of the present embodiment thus allows a maintenance work to be efficiently performed.

Furthermore, in work machine 1 in the present embodiment, at least one liquid replenishing port (for example, at least one of first, second and third liquid replenishing ports 20, 22 and 24) is disposed in an area of vehicular body 2 inner than working deck 50 in the top view of work machine 1. This facilitates ensuring a path in front of and behind working deck 50 for accessing working deck 50. For example, as shown in FIG. 3, it facilitates providing passageway 56 so as to extend frontward from front edge 52 of working deck 50 and also providing climbing device 7 immediately behind working deck 50, and thus facilitates ensuring an access path both in front of and behind working deck 50. Further, disposing working deck 50 at a rear end of vehicular body 2 allows climbing device 7 to be disposed at a rear end of working deck 50 and thus allows direct access from climbing device 7 to working deck 50. Further, with working deck 50 easily accessible, even while a maintenance worker replenishes the work machine with a liquid through any one of the liquid replenishing ports, another maintenance worker can easily access working deck 50 and replenish the work machine with a liquid through another liquid replenishing port. Thus, a plurality of (for example, two) maintenance workers can easily provide maintenance simultaneously on working deck 50.

In work machine 1 of the present embodiment, at least one liquid replenishing port includes first liquid replenishing port 20, second liquid replenishing port 22, and third liquid replenishing port 24. In the top view of work machine 1, center Cl of an opening of first liquid replenishing port 20, center C2 of an opening of second liquid replenishing port 22, and center C3 of an opening of third liquid replenishing port 24 are offset from one another in both the vehicular widthwise direction of vehicular body 2 and the frontward/rearward direction of vehicular body 2.

This can significantly reduce erroneous maintenance, that is, erroneous liquid replenishment by a maintenance worker. This allows a maintenance work to be accurately performed.

In work machine 1 of the present embodiment, at least one liquid replenishing port (for example, first liquid replenishing port 20) includes a port for replenishing work machine 1 with fuel.

Thus, a maintenance worker can easily perform a maintenance work of replenishing work machine 1 with fuel through first liquid replenishing port 20. Work machine 1 of the present embodiment thus allows a maintenance work to be efficiently performed.

In work machine 1 of the present embodiment, in the top view of work machine 1, at least one liquid replenishing port is disposed at a first distance (distance d₁) of 70 cm or less from working deck 50 in the vehicular widthwise direction of vehicular body 2.

Therefore, at least one liquid replenishing port is disposed within a range reachable by a maintenance worker on working deck 50 by hand. The maintenance worker can easily perform a maintenance work of replenishing the work machine with a liquid through at least one liquid replenishing port. Work machine 1 of the present embodiment thus allows a maintenance work to be efficiently performed.

In work machine 1 of the present embodiment, at least one liquid replenishing port is disposed at a height of 70 cm or less from working deck 50.

This can help a maintenance worker to connect a hose to at least one liquid replenishing port to supply a liquid and can thus help the maintenance worker to pour the liquid through at least one liquid replenishing port. Alternatively, this can help the maintenance worker to pour a liquid through at least one liquid replenishing port from a container containing the liquid. Work machine 1 of the present embodiment thus allows a maintenance work to be efficiently performed.

In work machine 1 of the present embodiment, a height from working deck 50 to at least one liquid replenishing port is 40 cm or more.

This can help a maintenance worker to connect a hose to at least one liquid replenishing port to supply a liquid and can thus help the maintenance worker to pour the liquid through at least one liquid replenishing port. Alternatively, this can help the maintenance worker to pour a liquid through at least one liquid replenishing port from a container containing the liquid. Work machine 1 of the present embodiment thus allows a maintenance work to be efficiently performed.

In work machine 1 of the present embodiment, in the top view of work machine 1, at least one liquid replenishing port includes a liquid replenishing port (for example, second liquid replenishing port 22) disposed closer to working deck 50 than lengthwise center 10 of vehicular body 2 is in the frontward/rearward direction of vehicular body 2 and opposed to working deck 50 in the frontward/rearward direction of vehicular body 2.

The maintenance worker can perform a maintenance work of replenishing the work machine with a liquid (for example, a reducing agent for a selective catalytic reduction device) through at least one liquid replenishing port (for example, second liquid replenishing port 22) on working deck 50 that allows the maintenance worker to keep his/her footing. The maintenance worker can thus easily perform the maintenance work for work machine 1. Work machine 1 of the present embodiment thus allows a maintenance work to be efficiently performed. Furthermore, second liquid replenishing port 22 is disposed in a direction with respect to working deck 50 that is different from a direction in which first liquid replenishing port 20 is disposed with respect to working deck 50. This can significantly reduce a risk of a maintenance worker erroneously replenishing the work machine through first liquid replenishing port 20 with a liquid that the work machine should be replenished with through second liquid replenishing port 22. This significantly reduces a possibility of the maintenance worker performing erroneous maintenance. Work machine 1 of the present embodiment thus allows a maintenance work to be accurately performed.

In work machine 1 of the present embodiment, at least one liquid replenishing port includes a replenishing port (for example, second liquid replenishing port 22) for at least one of a reducing agent for a selective catalytic reduction device of work machine 1 or hydraulic oil.

This can help a maintenance worker to perform a maintenance work of replenishing the work machine with at least one of the reducing agent or the hydraulic oil. Work machine 1 of the present embodiment thus allows a maintenance work to be efficiently and also accurately performed.

In work machine 1 of the present embodiment, at least one liquid replenishing port includes a replenishing port (e.g., third liquid replenishing port 24) for lubricating oil for a power line.

This can help a maintenance worker to perform a maintenance work of replenishing the work machine with lubricating oil for the power line. Work machine 1 of the present embodiment thus allows a maintenance work to be efficiently and also accurately performed.

In work machine 1 of the present embodiment, outer end 5e of first foothold 5 most distant from widthwise center 9 of vehicular body 2 in the vehicular widthwise direction of vehicular body 2 is located closer to widthwise center 9 of vehicular body 2 than an outer end of work machine 1 most distant from widthwise center 9 of vehicular body 2 in the vehicular widthwise direction of vehicular body 2 is. This suppresses interference of first foothold 5 with an obstacle even when work machine 1 travels.

First foothold 5 can thus avoid interfering with an obstacle outside work machine 1. Work machine 1 of the present embodiment thus allows a maintenance work to be efficiently performed.

In work machine 1 of the present embodiment, working deck 50 is disposed at a left rear or right rear portion of vehicular body 2.

This can help a maintenance worker to access working deck 50 from outside of work machine 1. Work machine 1 of the present embodiment thus allows a maintenance work to be efficiently performed.

Work machine 1 of the present embodiment further comprises climbing device 7 disposed behind crawler belt 36 and working deck 50.

A maintenance worker can easily access working deck 50 via climbing device 7. Work machine 1 of the present embodiment thus allows a maintenance work to be efficiently performed.

In work machine 1 of the present embodiment, vehicular body 2 includes cab 12 and second foothold 6. Second foothold 6 is disposed above crawler belt 36. First foothold 5 has passageway 56 extending from working deck 50 to second foothold 6. First width W₁ of working deck 50 in the vehicular widthwise direction of vehicular body 2 is larger than second width W₂ of passageway 56 in the vehicular widthwise direction of vehicular body 2. Cab 12 is provided with entrance and exit 13. Second foothold 6 is disposed in a vicinity of entrance and exit 13.

With second foothold 6 above crawler belt 36, a maintenance worker can easily access working deck 50 from outside of work machine 1 or from cab 12 through second foothold 6 and passageway 56. Work machine 1 of the present embodiment thus allows a maintenance work to be efficiently performed.

In work machine 1 of the present embodiment, second width W₂ of passageway 56 is 300 mm or more.

This can help a maintenance worker to access working deck 50 from outside of work machine 1 through second foothold 6 and passageway 56. Work machine 1 of the present embodiment thus allows a maintenance work to be efficiently performed.

In work machine 1 of the present embodiment, first foothold 5 includes anti-fall structure 58 provided at working deck 50.

Anti-fall structure 58 prevents a maintenance worker from falling off working deck 50. Work machine 1 of the present embodiment thus allows a maintenance work to be efficiently performed.

In work machine 1 of the present embodiment, first foothold 5 includes anti-fall structure 58.

Anti-fall structure 58 prevents a maintenance worker from falling off working deck 50 and passageway 56. Work machine 1 of the present embodiment thus allows a maintenance work to be efficiently performed.

In work machine 1 of the present embodiment, vehicular body 2 is provided with a member subject to maintenance (for example, at least one of wiper rubber 31 or air filter 29). In the top view of work machine 1, the member subject to maintenance is disposed at a position spaced from any one of inner edge 51 of working deck 50, front edge 52 of working deck 50, and corner 55 of working deck 50 by a distance of 70 cm or less (distances d₄ and d₅), and corner 55 of working deck 50 is formed by inner edge 51 of working deck 50 and front edge 52 of working deck 50.

Therefore, the member subject to maintenance is disposed within a range reachable by a maintenance worker on working deck 50 by hand. The maintenance worker can easily perform a maintenance work of maintenance of the member subject to maintenance. Work machine 1 of the present embodiment thus allows a maintenance work to be efficiently performed.

In work machine 1 of the present embodiment, the member subject to maintenance is disposed at a height (height h₄ or height h₅) of 200 cm or less from working deck 50.

Therefore, the member subject to maintenance is disposed within a range reachable by a maintenance worker on working deck 50 by hand. The maintenance worker can easily perform a maintenance work of maintenance of the member subject to maintenance. Work machine 1 of the present embodiment thus allows a maintenance work to be efficiently performed.

In work machine 1 of the present embodiment, vehicular body 2 has cab 12. Cab 12 is provided with rear window 15. The member subject to maintenance is wiper rubber 31 for wiping rear window 15.

Accordingly, a maintenance worker can easily perform a maintenance work of replacing wiper rubber 31. Work machine 1 of the present embodiment thus allows a maintenance work to be efficiently performed.

In work machine 1 of the present embodiment, vehicular body 2 has cab 12, and air conditioning unit 27 to condition air in cab 12. The member subject to maintenance is air filter 29 that removes dust contained in external air taken into cab 12 by air conditioning unit 27.

Accordingly, the maintenance worker can easily perform a maintenance work of replacing air filter 29. Work machine 1 of the present embodiment thus allows a maintenance work to be efficiently performed.

It should be understood that the embodiments disclosed herein have been described for the purpose of illustration only and in a non-restrictive manner in any respect. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the meaning and scope equivalent to the terms of the claims.

REFERENCE SIGNS LIST

• • 1 work machine, 2 vehicular body, 2c center, 4 work implement, 5 first foothold, 5e outer edge, 6 second foothold, 7 climbing device, 8 ripper apparatus, 9 widthwise center, 9a, 9b, 10a, 10b virtual straight line, 10 lengthwise center, 11 vehicular body frame, 12 cab, 13 entrance and exit, 15 rear window, 16 engine compartment, 20 first liquid replenishing port, 21 first cap, 22 second liquid replenishing port, 23 second cap, 24 third liquid replenishing port, 25 third cap, 27 air conditioning unit, 28 filter attachment, 29 air filter, 30 wiper, 31 wiper rubber, 32 arm, 35 traveling apparatus, 35e outer end, 36,37 crawler belt, 40 blade, 40e outer end, 41 frame, 42 tilt cylinder, 43 lift cylinder, 45 ripper, 50 working deck, 51 inner edge, 52 10 front edge, 53 outer edge, 54 rear edge, 55 corner, 56 passageway, 57 outer sidewall, 58 anti-fall structure, 60 first area, 61 first partial area, 62 second partial area, 63 third partial area, 65 second area, 71 handrail, C1, C2, C3 center of opening.

Claims

1. A work machine comprising:

a vehicular body having a first foothold; and

a traveling apparatus attached to the vehicular body,

the traveling apparatus having a crawler belt,

the first foothold being located above the crawler belt and having a working deck,

the vehicular body being provided with at least one liquid replenishing port,

in a top view of the work machine, the at least one liquid replenishing port being disposed in an area of the vehicular body inner than the working deck.

2. The work machine according to claim 1, wherein in the top view the at least one liquid replenishing port includes a liquid replenishing port opposed to the working deck in a vehicular widthwise direction of the vehicular body.

3. The work machine according to claim 1, wherein in the top view the at least one liquid replenishing port includes a liquid replenishing port opposed to the working deck in a frontward/rearward direction of the vehicular body.

4. The work machine according to claim 1, wherein

the at least one liquid replenishing port includes a first liquid replenishing port, a second liquid replenishing port, and a third liquid replenishing port, and

in the top view, the third liquid replenishing port is disposed in an area sandwiched between the first liquid replenishing port and the second liquid replenishing port.

5. The work machine according to claim 1, wherein

the at least one liquid replenishing port includes a first liquid replenishing port, a second liquid replenishing port, and a third liquid replenishing port, and

in the top view, a center of an opening of the first liquid replenishing port, a center of an opening of the second liquid replenishing port, and a center of an opening of the third liquid replenishing port are offset from one another in both the vehicular widthwise direction of the vehicular body and the frontward/rearward direction of the vehicular body.

6. The work machine according to claim 1, wherein the at least one liquid replenishing port includes at least one of a replenishing port for fuel for the work machine, a replenishing port for a reducing agent for a selective catalytic reduction device of the work machine, and a replenishing port for a lubricating oil for a power line of the work machine.

7. The work machine according to claim 1, wherein in the top view, the at least one liquid replenishing port is disposed at a position spaced from the working deck by a distance of 70 cm or less.

8. The work machine according to claim 1, wherein the at least one liquid replenishing port is disposed at a height of 70 cm or less from the working deck.

9. The work machine according to claim 1, wherein a height from the working deck to the at least one liquid replenishing port is 40 cm or more.

10. The work machine according to claim 1, wherein an outer end of the first foothold most distant from a widthwise center of the vehicular body in a vehicular widthwise direction of the vehicular body is located closer to the widthwise center of the vehicular body than an outer end of the work machine most distant from the widthwise center of the vehicular body in the vehicular widthwise direction of the vehicular body is.

11. The work machine according to claim 10, wherein

the work machine comprises a blade, and

the outer end of the work machine is an outer end of the blade.

12. The work machine according to claim 1, wherein the working deck is disposed at a left rear or right rear portion of the vehicular body.

13. The work machine according to claim 1, further comprising a climbing device disposed behind the crawler belt and the working deck.

14. The work machine according to claim 1, wherein

the vehicular body has a cab and a second foothold disposed above the crawler belt,

the first foothold has a passageway extending from the working deck to the second foothold,

a first width of the working deck in a vehicular widthwise direction of the vehicular body is larger than a second width of the passageway in the vehicular widthwise direction of the vehicular body,

the cab is provided with an entrance and exit, and

the second foothold is disposed in a vicinity of the entrance and exit.

15. The work machine according to claim 14, wherein the second width of the passageway is 300 mm or more.

16. The work machine according to claim 1, wherein the first foothold has an anti-fall structure.

17. The work machine according to claim 1, wherein

the vehicular body is provided with a member subject to maintenance, and

in the top view, the member subject to maintenance is disposed at a position spaced from any one of an inner edge of the working deck, a front edge of the working deck, and a corner of the working deck by a distance of 70 cm or less, and the corner of the working deck is formed by the inner edge of the working deck and the front edge of the working deck.

18. The work machine according to claim 17, wherein the member subject to maintenance is disposed at a height of 200 cm or less from the working deck.

19. The work machine according to claim 17, wherein

the vehicular body has a cab,

the cab is provided with a window, and

the member subject to maintenance is wiper rubber for wiping the window.

20. The work machine according to claim 17, wherein

the vehicular body has a cab, and an air conditioning unit to condition air in the cab, and

the member subject to maintenance is an air filter for removing dust contained in external air taken into the cab by the air conditioning unit.