LOADER

The present disclosure relates to a loader, including: a frame, including a chassis, and a bearing portion mounted above the chassis; a cab, mounted on the chassis and located in front of the bearing portion; a movable arm, including a front end located in front of the cab, and a rear end located at a rear part of the frame; a rear connecting rod, including a first end hinged with the bearing portion, and a second end hinged with the movable arm; a front connecting rod, including a first end hinged with the bearing portion, and a second end hinged withe movable arm; and a hydraulic cylinder, including a first end hinged with the bearing portion, and a second end hinged with the movable arm, so as to drive the front end of the movable arm to switch between a lower position and a upper position. The bearing portion is located below a rear window of the cab or at a side part of the rear window. By applying the technical solution of the present disclosure, the bearing portion is positioned below the rear window of the cab or located at the side part of the rear window, so that the problem of poor rear view of a skid steer loader in the related art is solved.

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Description
CROSS-REFERENCE TO RELATED APPLICATIONS

The present disclosure is based on and claims priority to CN application No. CN202010757226.1, filed on Jul. 31, 2020, the disclosure of which is hereby incorporated by reference in its entirety.

FIELD OF THE DISCLOSURE

The present disclosure relates to the field of engineering machinery, and in particular, to a loader.

BACKGROUND OF THE DISCLOSURE

A skid steer loader is special wheel type chassis equipment for realizing vehicle steering by utilizing a linear velocity difference of wheels at two sides, and is mainly applied to occasions with a narrow operation place, uneven ground and frequent operation content change.

A lifting mechanism for lifting a bucket of a traditional skid steer loader adopts radial lifting. Specifically, a rear end of a movable arm is hinged with a frame, and the bucket is connected to a front end of the movable arm. Under the action of a driving oil cylinder, the front end of the movable arm moves around an arc taking a hinge point of the movable arm and the frame as a circle center, the front end of the movable arm extends forwards in a horizontal direction and then moves backwards, and the lifting mechanism has the disadvantages of low lifting capacity and small lifting height. In order to improve the problems, a skid mainstream manufacturer discloses a vertical lifting working device, that is, the front end of a movable arm is similar to a vertical trajectory in the lifting process through the design of a complex connecting rod mechanism, the lifting height is increased, and the rated load capacity is enhanced.

The skid steer loader with a vertical lifting device mechanism is present in the related art, but the skid steer loader with the vertical lifting device mechanism in the related art has a problem of poor driver's rear view, that is, the lifting mechanism is between the upper rear part of the frame and the rear part of the cab, thereby greatly affecting the driver's rear view. The multifunctionality of the skid steer loader is reflected in that different machines can be easily hung at the front end of the skid steer loader to work, but part of the common machines and tools need to work under the condition that the skid steer loader is reversed, for example, a closed type sweeper and a ditcher. When the skid steer loader works backwards, a driver needs to observe the view of the rear part of the whole machine through a rear window of a cab at any time. Therefore, the existing vertical lifting working device of the skid steer loader is generally higher in rear structural design, which greatly shields the view field of a rear window of a driver and has a view field blind area, resulting in a great risk in the backing operation process.

SUMMARY OF THE DISCLOSURE

The present disclosure aims to provide a loader to improve the problem of poor rear view of the loader in related art

According to one aspect of embodiments of the present disclosure, a loader is provided. The loader includes:

    • a frame, including a chassis, and a bearing portion mounted above the chassis;
    • a cab, mounted on the chassis and located in front of the bearing portion;
    • a movable arm, including a front end located in front of the cab, and a rear end located at a rear part of the frame;
    • a rear connecting rod, including a first end hinged with the bearing portion, and a second end hinged with the movable arm;
    • a front connecting rod, including a first end hinged with the bearing portion, and a second end hinged with the movable arm; and
    • a hydraulic cylinder rod, including a first end hinged with the bearing portion, and a second end hinged with the movable arm, so as to drive the front end of the movable arm to switch between a lower position and an upper position,
    • wherein the bearing portion is located below a rear window of the cab or at a side part of the rear window.

In some embodiments, the bearing portion includes:

    • a first bearing portion, wherein an upper end of the first bearing portion and the first end of the rear connecting rod are hinged at a first hinge point, and the first bearing portion is lower than the rear window of the cab; and/or
    • a second bearing portion, wherein an upper end of the second bearing portion and the first end of the front connecting rod are hinged at a second hinge point, and the second bearing portion is located at a side part of the rear window of the cab.

In some embodiments, the second bearing portion is located in front of the first bearing portion and adjacent to a rear wall of the cab.

In some embodiments, the second bearing portion is connected to a rear wall of the cab.

In some embodiments, the movable arm includes:

    • a first hinge portion, hinged with the second end of the rear connecting rod;
    • a second hinge portion, hinged with the second end of the front connecting rod; and
    • a third hinge portion, hinged with the second end of the hydraulic cylinder,
    • wherein the first hinge portion, the second hinge portion and the third hinge portion are arranged on the movable arm side by side.

In some embodiments, the first hinge portion, the second hinge portion and the third hinge portion are arranged sequentially from back to front.

In some embodiments, when the front end of the movable arm is located at the lower position, in a horizontal and/or vertical direction, the second hinge portion is located between the first hinge point of the first end of the rear connecting rod and the bearing portion and the second hinge point of the first end of the front connecting rod and the bearing portion.

In some embodiments, when the front end of the movable arm is located at the lower position, the second hinge portion is located rearward and below a connecting line of the first hinge portion and the second hinge point of the first end of the front connecting rod and the bearing portion.

In some embodiments, when the front end of the movable arm is located at the lower position, the second end of the rear connecting rod is located rearward and above the first end of the rear connecting rod; and when the front end of the movable arm is located at the lower position, the second end of the front connecting rod is located rearward and below the first end of the front connecting rod.

In some embodiments, when the front end of the movable arm is located at the upper position, the second end of the rear connecting rod is located rearward and below the first end of the rear connecting rod; and when the front end of the movable arm is located at the upper position, the second end of the rear connecting rod is located rearward and above the first end of the front connecting rod.

In some embodiments, a third hinge point of the first end of the hydraulic cylinder and the bearing portion is located rearward and below the first hinge point of the first end of the rear connecting rod and the bearing portion.

In some embodiments, the first hinge point of the first end of the rear connecting rod and the bearing portion is located rearward and below the second hinge point of the first end of the front connecting rod and the bearing portion.

In some embodiments, the movable arm includes:

    • two arms, respectively located on two sides of the cab;
    • a first cross beam, connected to front ends of the two arms; and
    • a pedal, mounted on the first cross beam.

In some embodiments, during the movement of the front end of the movable arm from a first position to a second position, the rear connecting rod moves counterclockwise first and then moves clockwise, and the front connecting rod moves clockwise all the time.

By applying the technical solution of the present disclosure, the bearing portion is positioned below the rear window of the cab or located at the side part of the rear window, so that the problem of poor rear view of the loader in the related art is solved.

Other features and advantages of the present disclosure will become apparent through the detailed description of exemplary embodiments of the present disclosure with reference to the following accompanying drawings.

BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS

The drawings as a part of the present disclosure are used to provide further understanding of the present disclosure. Illustrative embodiments of the present disclosure and description thereof are used for explaining the present disclosure but do not improperly limit the present disclosure. In the drawings:

FIG. 1 is a three-dimensional schematic diagram of a loader according to an embodiment of the present disclosure;

FIG. 2 is a schematic structural diagram when a front end of a movable arm of a loader according to an embodiment of the present disclosure is located at a lower position;

FIG. 3 is a schematic structural diagram when a front end of a movable arm of a loader according to an embodiment of the present disclosure is located at an upper position;

FIG. 4 is a schematic structural diagram of a rear connecting rod of a loader according to an embodiment of the present disclosure;

FIG. 5 is a schematic structural diagram of a front connecting rod of a loader according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of a movable arm of a loader according to an embodiment of the present disclosure; and

FIG. 7 is a schematic diagram of a view field of a rear window of a cab of a loader according to an embodiment of the present disclosure.

 DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The technical solutions in the embodiments of the present disclosure are described clearly with reference to the accompanying drawings in the embodiments of the present disclosure. Apparently, the described embodiments are merely some rather than all of the embodiments of the present disclosure. The following description of the at least one exemplary embodiment is actually merely illustrative and never constitutes any limitation to the present disclosure and application or use thereof. All other embodiments made based on the embodiments of the present disclosure by a person of ordinary skill in the art without paying any creative effort shall be included in the protection scope of the present disclosure.

FIG. 1 is a three-dimensional schematic diagram of a loader according to an embodiment of the present disclosure. As shown in FIG. 1, the loader in this embodiment includes a frame 5, a cab 6, a movable arm 3, a rear connecting rod 1, a front connecting rod 2, and a hydraulic cylinder 4.

The frame 5 includes a chassis, and a bearing portion mounted above the chassis; the cab 6 is mounted on the chassis and located in front of the bearing portion; the movable arm 3 includes a front end 34 located in front of the cab 6, and a rear end located at a rear part of the frame 5; the rear connecting rod 1 includes a first end 11 hinged with the bearing portion, and a second end 12 hinged with the movable arm 3; the front connecting rod 2 includes a first end 21 hinged with the bearing portion, and a second end 22 hinged withe movable arm 3; and the hydraulic cylinder 4 includes a first end 41 hinged with the bearing portion, and a second end 42 hinged with the movable arm 3, so as to drive the front end 34 of the movable arm 3 to switch between a lower position and a upper position.

As shown in FIG. 7, the bearing portion is located below a rear window 61 of the cab 6 or at a side part of the rear window 61, so that the problem of poor rear view of the loader in related art is improved.

In this embodiment, the movable arm 3 and the frame 5 are connected through a connecting rod mechanism, and in the lifting process of the movable arm 3, a trajectory 7 of the front end 34 of the movable arm 3 is approximately a vertical straight line.

During the movement of the front end 34 of the movable arm 3 from a first position to a second position, the rear connecting rod 1 moves counterclockwise first and then moves clockwise, and the front connecting rod 2 moves clockwise all the time.

The bearing portion includes a first bearing portion and a second bearing portion, wherein an upper end of the first bearing portion and a first end 11 of the rear connecting rod 1 are hinged at a first hinge point 51, the first bearing portion is lower than the rear window 61 of the cab 6, an upper end of the second bearing portion and a first end 21 of the front connecting rod 2 are hinged at a second hinge point 52, and the second bearing portion is located at a side part of the rear window 61 of the cab 6.

The second bearing portion is located in front of the first bearing portion and adjacent to a rear wall of the cab 6. The second bearing portion can play a role in protecting the rear window of the cab 6, and can avoid serious deformation of the cab 6 under severe and dangerous conditions such as rollover to help a user escape from the rear window 61.

In some embodiments, the second bearing portion is higher than the first bearing portion. In some embodiments, the second bearing portion is connected to a rear wall of the cab 6.

Referring to FIG. 1 to FIG. 6, the movable arm 3 includes a first hinge portion 31, a second hinge portion 32, and a third hinge portion 33. The first hinge portion 31 is hinged with a second end 12 of the rear connecting rod 1; the second hinge portion 32 is hinged with a second end 22 of the front connecting rod 2; and the third hinge portion 33 is hinged with a second end 42 of the hydraulic cylinder 4. The first hinge portion 31, the second hinge portion 32 and the third hinge portion 33 are arranged on the movable arm 3 side by side.

The first hinge portion 31, the second hinge portion 32 and the third hinge portion 33 are arranged sequentially from back to front.

As shown in FIG. 1 and FIG. 2, when the front end 34 of the movable arm 3 is located at the lower position, in a horizontal direction and a vertical direction, the second hinge portion 32 is located between the first hinge point 51 of the first end 11 of the rear connecting rod 1 and the bearing portion and the second hinge point 52 of the first end 21 of the front connecting rod 2 and the bearing portion.

When the front end 34 of the movable arm 3 is located at the lower position, the second hinge portion 32 is located below a connecting line of the first hinge portion 31 and the second hinge point 52 of the first end 21 of the front connecting rod 2 and the bearing portion.

When the front end 34 of the movable arm 3 is located at the lower position, the second end 12 of the rear connecting rod 1 is located rearward and above the first end 11 of the rear connecting rod 1; and when the front end 34 of the movable arm 3 is located at the lower position, the second end 22 of the front connecting rod 2 is located rearward and below the first end 21 of the front connecting rod 2.

As shown in FIG. 3, when the front end 34 of the movable arm 3 is located at the upper position, the second end 12 of the rear connecting rod 1 is located rearward and above the first end 11 of the rear connecting rod 1; and when the front end 34 of the movable arm 3 is located at the upper position, the second end 22 of the front connecting rod 2 is located rearward and above the first end 21 of the front connecting rod 2.

The third hinge point 53 of the first end of the hydraulic cylinder 4 and the bearing portion is located below the first hinge point 51 of the first end 11 of the rear connecting rod 1 and the bearing portion.

The first hinge point 51 of the first end 11 of the rear connecting rod 1 and the bearing portion is located behind the second hinge point 52 of the first end 21 of the front connecting rod 2 and the bearing portion, and the first hinge point 51 is lower than or the second hinge point 52 or aligned with the second hinge point 52.

As shown in FIG. 6, the movable arm 3 includes two arms, a first cross beam 35 and a pedal 36. The two arms are respectively located on two sides of the cab 6; the first cross beam 35 is connected to front ends of the two arms; and the pedal 36 is mounted on the first cross beam 35.

When the front end 34 of the movable arm 3 is lifted from a lower position to an upper position under the driving of the hydraulic cylinder 4, the rear connecting rod 1 moves counterclockwise for a short time first and then moves clockwise, and the front connecting rod 2 moves clockwise all the time.

When the front end 34 of the movable arm 3 is located at the lower position, the second end 12 of the rear connecting rod 1 is located rearward and above the first end 11 of the rear connecting rod 1, so that the front end 34 of the movable arm 3 extends forwards at the beginning of lifting and then ascends approximately vertically, which is beneficial to the stability of low-position transportation.

The rear connecting rod 1 includes two rod-shaped parts at two ends in a width direction of the loader, and a second cross beam 14 connecting the two rod-shaped parts, for connecting rear connecting rod-related structures on two sides of a longitudinal center. The second cross beam 35 is arranged at the front end of the movable arm 3, and the rear connecting rod 1 and the cross beam on the movable arm 3 can well reduce the offset of the movable arm when the movable arm is laterally stressed and enhance the structural strength. The pedal 36 is arranged on the cross beam 35, thereby facilitating a driver to step into the cab from a front door.

Referring to FIG. 1 to FIG. 3, the loader further includes a bucket rotatably mounted at the front end of the movable arm 3, and a hydraulic cylinder for driving the bucket to rotate relative to the movable arm 3.

The descriptions above are only exemplary embodiments of the present disclosure, but are not intended to limit the present disclosure; and any modifications, equivalent substitutions, improvements and the like made within the spirit and principles of the present disclosure should be all included in the protection scope of the present disclosure.

Claims

1. A loader, comprising:

a frame, comprising a chassis (8), and a bearing portion (5) mounted above the chassis (8);
a cab (6), mounted on the chassis (8) and located in front of the bearing portion (5);
a movable arm (3), comprising a front end (34) located in front of the cab (6), and a rear end located at a rear part of the frame;
a rear connecting rod (1), comprising a first end (11) hinged with the bearing portion (5), and a second end (12) hinged with the movable arm (3);
a front connecting rod (2), comprising a first end (21) hinged with the bearing portion (5), and a second end (22) hinged with the movable arm (3); and
a hydraulic cylinder (4), comprising a first end (41) hinged with the bearing portion (5), and a second end (42) hinged with the movable arm (3), so as to drive the front end (34) of the movable arm (3) to switch between a lower position and an upper position,
wherein the bearing portion (5) is located below a rear window (61) of the cab (6) or at a side part of the rear window (61).

2. The loader according to claim 1, wherein the bearing portion (5) comprises:

a first bearing portion, wherein an upper end of the first bearing portion and the first end (11) of the rear connecting rod (1) are hinged at a first hinge point (51), and the first bearing portion is lower than the rear window (61) of the cab (6); and/or
a second bearing portion, wherein an upper end of the second bearing portion and the first end (21) of the front connecting rod (2) are hinged at a second hinge point (52), and the second bearing portion is located at the side part of the rear window (61) of the cab (6).

3. The loader according to claim 1, wherein the second bearing portion is located in front of the first bearing portion and adjacent to a rear wall of the cab (6).

4. The loader according to claim 3, wherein the second bearing portion is connected to the rear wall of the cab (6).

5. The loader according to claim 1, wherein the movable arm (3) comprises:

a first hinge portion (31), hinged with the second end (12) of the rear connecting rod (1);
a second hinge portion (32), hinged with the second end (22) of the front connecting rod (2); and
a third hinge portion (33), hinged with the second end (42) of the hydraulic cylinder (4),
wherein the first hinge portion (31), the second hinge portion (32) and the third hinge portion (33) are arranged on the movable arm (3) side by side.

6. The loader according to claim 5, wherein the first hinge portion (31), the second hinge portion (32) and the third hinge portion (33) are arranged sequentially from back to front.

7. The loader according to claim 5, wherein

when the front end (34) of the movable arm (3) is located at the lower position, in a horizontal and/or vertical direction, the second hinge portion (32) is located between the first hinge point (51) of the first end (11) of the rear connecting rod (1) and the bearing portion and the second hinge point (52) of the first end (21) of the front connecting rod (2) and the bearing portion (5).

8. The loader according to claim 5, wherein when the front end (34) of the movable arm (3) is located at the lower position, the second hinge portion (32) is located below a connecting line between the first hinge portion (31) and the second hinge point (52) of the first end (21) of the front connecting rod (2) and the bearing portion (5).

9. The loader according to claim 1, wherein

when the front end (34) of the movable arm (3) is located at the lower position, the second end (12) of the rear connecting rod (1) is located rearward and above the first end (11) of the rear connecting rod (1); and
when the front end (34) of the movable arm (3) is located at the lower position, the second end (22) of the front connecting rod (2) is located rearward and below the first end (21) of the front connecting rod (2).

10. The loader according to claim 1, wherein

when the front end (34) of the movable arm (3) is located at the upper position, the second end (12) of the rear connecting rod (1) is located rearward and above the first end (11) of the rear connecting rod (1); and
when the front end (34) of the movable arm (3) is located at the upper position, the second end (22) of the front connecting rod (2) is located rearward and above the first end (21) of the front connecting rod (2).

11. The loader according to claim 1, wherein a third hinge point (53) of the first end (41) of the hydraulic cylinder (4) and the bearing portion (5) is located rearward and below the first hinge point (51) of the first end (11) of the rear connecting rod (1) and the bearing portion (5).

12. The loader according to claim 1, wherein when the first hinge point (51) of the first end (11) of the rear connecting rod (1) and the bearing portion (5) is located rearward and below the second hinge point (52) of the first end (21) of the front connecting rod (2) and the bearing portion (5).

13. The loader according to claim 1, wherein the movable arm (3) comprises:

two arms, respectively located on two sides of the cab (6);
a first cross beam (35), connected to front ends of the two arms; and
a pedal (36), mounted on the first cross beam (35).

14. The loader according to claim 1, wherein during the movement of the front end (34) of the movable arm (3) from a first position to a second position, the rear connecting rod (1) moves counterclockwise first and then moves clockwise, and the front connecting rod (2) moves clockwise all the time.

Patent History
Publication number: 20230304253
Type: Application
Filed: Aug 18, 2020
Publication Date: Sep 28, 2023
Applicant: XCMG CONSTRUCTION MACHINERY CO., LTD. SCIENCE & TECHNOLOGY BRANCH (XUZHOU)
Inventors: Xunli WEI (XUZHOU), Yong SHEN (XUZHOU), Hongbing SONG (XUZHOU), Peng XU (XUZHOU), Zhigang LI (XUZHOU)
Application Number: 18/018,810
Classifications
International Classification: E02F 3/34 (20060101); E02F 3/38 (20060101); E02F 3/42 (20060101); E02F 9/08 (20060101);