Abstract: Theme To provide a small-sized crawler device that can stably ride over bumps or steps or stairs. Means to Solve The crawler device includes a device body (1) having main crawlers (20) on its left and right and auxiliary crawlers (30) provided as auxiliary members at one end portion of the device body. Before the crawler device ascends a step or stairs with the auxiliary crawler (30) positioned backward, the controller (65) brings the auxiliary crawler (30) into a preparatory state in which the auxiliary crawler (30) is freely rotatable with respect to the main crawler (20) or the auxiliary crawler (30) is maintained in a position above a line extending longitudinally from the main crawler by a predetermined angle.

Abstract: Theme To provide a crawler unit having a light-weight and high-strength crawler belt. Means to Solve A crawler belt 20 comprises an endless steel belt 21 (high-tensile-strength belt) and a belt main body 22 made of rubber and attached around an outer periphery of the steel belt 21. The steel belt 21 has engagement holes 21a arranged at even intervals in a circumferential direction thereof. The belt main body 22 has escape recesses 23a formed therein. A wheel 10 has projections 12a arranged at even intervals in a circumferential direction on an outer peripheral surface thereof. The projections 12a are adapted to be engaged with the engagement holes 21a of the steel belt 21 and at the same time to enter the escape recesses 23a of the belt main body 22.

Abstract: A crawler belt is disclosed herein having an endless steel belt (high-tensile-strength belt) and a belt main body made of rubber and attached around an outer periphery of the steel belt. The steel belt has engagement holes arranged at even intervals in a circumferential direction thereof. The belt main body has escape recesses formed therein. A wheel has projections arranged at even intervals in a circumferential direction on an outer peripheral surface thereof. The projections are adapted to be engaged with the engagement holes of the steel belt and at the same time to enter the escape recesses of the belt main body.

Abstract: The degree of freedom in design is increased while maintaining strength by enabling a decorative member to be disposed without thinning a wheel main body. A wheel is made up of a wheel main body 1 which is made up of a rim portion 10 and a disc portion 11 and which has a vent hole 141 in the disc portion 11 and a decorative member 2 made from a resin which is held in at least the disc portion 11 and is observed from the vent hole 141. Since the decorative member 2 is observed in the vent hole 141, the wheel main body 1 including spoke portions 14 does not have to be thinned. In addition, since the design of the decorative member is observed in cooperation with the design of the disc portion 11, the degree of freedom in design is increased.

Abstract: A wheel for vehicle includes a wheel body, a decorated member, and a visible space. The wheel body has a rim, a hub, and a plurality of spokes connecting the hub and the rim. The decorated member is made from resin, is disposed on a surface of at least one of the spokes, and is retained to the wheel body. The visible space is disposed between the decorated member and the one of the spokes at least, exhibits a height in an axial direction of the wheel body, and is visible from an axial outer side of the wheel body.

Abstract: THEME To provide a crawler unit that can move over a high step or bump. MEANS TO SOLVE A crawler belt 20 includes first regions and second regions alternately arranged in a circumferential direction thereof. The first region has at least one first tread lug 25 and the second region has at least one second tread lug 26. The first tread lug 25 has high flexural rigidity and is not easily bent and the second tread lug 26 has low flexural rigidity and is easily bent. The first tread lug 25 catches on an upper end of a high step or bump S with the second tread lug 26 in a bent condition, thus allowing the crawler unit to move over the step or bump.

Abstract: Means to Solve A crawler belt 20 comprises an endless steel belt 21 (high-tensile-strength belt) and a belt main body 22 made of rubber and attached around an outer periphery of the steel belt 21. The steel belt 21 has engagement holes 21a arranged at even intervals in a circumferential direction thereof. The belt main body 22 has escape recesses 23a formed therein. A wheel 10 has projections 12a arranged at even intervals in a circumferential direction on an outer peripheral surface thereof. The projections 12a are adapted to be engaged with the engagement holes 21a of the steel belt 21 and at the same time to enter the escape recesses 23a of the belt main body 22.

Abstract: A metallic glass laminate of the present invention is characterized in that a metallic glass layer of amorphous phase is formed on the substrate surface, and there is no continuous pore (pinhole) through the metallic glass layer. The metallic glass laminate is preferably obtained by solidification and lamination of at least part of the metallic glass powder in the molten state or in the supercooled liquid state on the substrate surface. Because of the dense metallic glass layer of homogenous amorphous phase, the functionalities of metallic glass such as corrosion resistance and wear resistance can be satisfactorily provided. A thick and a large-area metallic glass layer can be formed. The metallic glass layer can also be formed into various shapes within the supercooled liquid temperature range. In addition, a metallic glass bulk can be obtained by removing the substrate.

Abstract: A suspension element is disposed inside of a rim. The upper end of the suspension element is connected to a first support member mounted to a vehicle body. The lower end of the suspension element is connected to a second support member rotatably connected to the disk on the wheel. The shock and vibration from the wheel in the vertical direction are damped and absorbed by the suspension element. Also, a spring mechanism and a flat bearing are disposed in the wheel. The spring mechanism is disposed between a rotating member rotatably supported on the vehicle body and the rim of the wheel. If the rotating member is fixed to a brake drum, braking torque is transmitted to the wheel through the spring mechanism. The flat bearing is disposed between the rim and the rotating member and prohibits the axial movement of the wheel relative to the vehicle body.

Abstract: A laterally installing wheel including a rim in which a rim main portion and a side ring are disconnectably coupled to each other at a coupling portion of the rim main portion and the side ring, wherein the coupling portion is constructed such that a gap between the rim main portion and the side ring is inconspicuous from outside in the axial direction of the wheel. The coupling portion is provided at an axially inner portion of the rim. In a case where the coupling portion is provided at an axially outer portion of the rim, the coupling portion is located at an inconspicuous portion.

Abstract: Means to Solve A crawler belt 20 comprises an endless steel belt 21 (high-tensile-strength belt) and a belt main body 22 made of rubber and attached around an outer periphery of the steel belt 21. The steel belt 21 has engagement holes 21a arranged at even intervals in a circumferential direction thereof. The belt main body 22 has escape recesses 23a formed therein. A wheel 10 has projections 12a arranged at even intervals in a circumferential direction on an outer peripheral surface thereof. The projections 12a are adapted to be engaged with the engagement holes 21a of the steel belt 21 and at the same time to enter the escape recesses 23a of the belt main body 22.

Abstract: [Problems]To provide a wheel assembly allowing the elimination of an installation space for suspension element on the outside of a wheel and capable of satisfactorily damping and absorbing shock and vibration in the vertical direction. [Means for Solving Problems] Suspension element (70) is disposed, in a generally raised state, inside of a rim (11). The upper end of the suspension element (70) is connected to a first support member (50) mounted to a vehicle body. The lower end of the suspension element (70) is connected to a second support member (60) rotatably connected to the disk (12) on the wheel (10). The shock and vibration from the wheel (10) in the vertical direction are damped and absorbed by the suspension element (70). Also, a spring mechanism (30) and a flat bearing (40) are disposed in the wheel (10). The spring mechanism (30) is disposed between a rotating member (20) rotatably supported on the vehicle body and the rim (11) of the wheel (10).

Abstract: A rim material having a non-uniform thickness, a rim manufactured from the rim material, and a method for manufacturing the rim from the rim material. The rim material includes a first material portion which forms an axially curved portion of the rim after the rim material is formed to the rim and a second material portion which forms an intermediate portion between adjacent axially curved portions after the rim material is formed to the rim. The first material portion has a thick parallel-surface portion including opposite surfaces parallel to each other. The parallel-surface portion has a width greater than a maximum amount of an axial dislocation of the parallel-surface portion expected to occur when the parallel-surface portion is formed to a corresponding curved portion. The second material portion has a thickness varying portion. The thickness varying portion includes a surface having a configuration defined by a line including a straight line and/or a slightly curved line.

Abstract: A seal for an endless track has a cross section having a centerline parallel to an axis of the seal and a configuration symmetric with respect to the centerline of the cross section. The seal can include an elastically deformably configured portion having a cross section like alphabetical letter X, and a protrusion extending from an intersection of legs of letter X in a bushing-side direction further than a plane connecting bushing-side end portions of the legs of letter X. The protrusion has an end surface where the protrusion contacts the bushing. The seal can further include an embedding portion embedded in a space between legs of letter X, on a bushing-side of the intersection of the legs of letter X.

Abstract: An endless track includes an iron link belt, a continuous pad, and a connecting device. The iron link belt includes a link unit assembly constructed of a plurality of link units connected to each other. Each link unit includes a pair of links. The iron link belt may include a plate welded to the pair of links and extending perpendicularly to a direction in which the link unit assembly extends. The continuous pad includes the same number of core metal plates as that of the link units and a single urethane rubber belt covering and being attached to a ground opposing surface of each of the core metal plates. The urethane rubber belt extends continuously over all of the core metal plates. The urethane rubber belt may include a small thickness portion positioned between two adjacent core metal plates. The connecting device connects the iron link belt and the continuous pad.

Abstract: A wheel with a spring unit includes a rim, a disc and a plurality of spring units. Each spring unit is directed circumferentially and arranged in an annular space between the rim and the disc. Each spring unit includes at least one metal spring. The metal spring may be a coil spring or a leaf spring, and may be prestressed in compression or tension. To restrict the lateral relative movement between the rim and the disc, a pair of stopper ribs are disposed on opposite sides of the spring unit, or an axial movement stopper is disposed at axially outboard end of the wheel.

Abstract: A structure for standardizing at least one kind of part of a roller assembly for a construction vehicle so that the part can be used for a same size of construction vehicles having different structural specifications of a plurality of construction vehicle makers. The at least one kind of part includes at least one of a shell, a shaft, a floating seal, a bushing and a collar. Structural specifications including the configuration and dimension, the kind of steel or material, and the heat treatment specification or the mechanical property for the at least one kind of part are unified as much as possible over the same size of the construction vehicles of a plurality of construction vehicle makers.

Abstract: A wheel with a spring unit includes a rim, a disc and a plurality of spring units. Each spring unit is directed circumferentially and arranged in an annular space between the rim and the disc. Each spring unit includes at least one metal spring. The metal spring may be a coil spring or a leaf spring, and may be prestressed in compression or tension. To restrict the lateral relative movement between the rim and the disc, a pair of stopper ribs are disposed on opposite sides of the spring unit, or an axial movement stopper is disposed at axially outboard end of the wheel.

Abstract: A lightened disk for a wheel has a flange having an axially inboard edge. The inboard edge includes a general portion which is located in a plane perpendicular to an axis of the disk. The flange portion has a thickness less than 90% of a thickness of a disk material at at least the general portion of the inboard edge. A method for manufacturing a lightened disk for a wheel includes a drawing step during which the flange portion is drawn such than the flange portion has a thickness less than 90% of a thickness of a disk material at at least the general portion of the inboard edge.

Abstract: A wheel with a spring unit includes a rim, a disc and a plurality of spring units. Each spring unit is directed circumferentially and arranged in an annular space between the rim and the disc. Each spring unit includes at least one metal spring. The metal spring may be a coil spring or a leaf spring, and may be prestressed in compression or tension. To restrict the lateral relative movement between the rim and the disc, a pair of stopper ribs are disposed on opposite sides of the spring unit, or an axial movement stopper is disposed at axially outboard end of the wheel.