CN112609757A

CN112609757A - Skid-steer loader and movable arm mounting structure thereof

Info

Publication number: CN112609757A
Application number: CN202011487223.7A
Authority: CN
Inventors: 汤雄; 匡前友; 边斌
Original assignee: Zoomlion Heavy Industry Science and Technology Co Ltd; Zoomlion Earth Moving Machinery Co Ltd
Current assignee: Zoomlion Heavy Industry Science and Technology Co Ltd; Zoomlion Earth Moving Machinery Co Ltd
Priority date: 2020-12-16
Filing date: 2020-12-16
Publication date: 2021-04-06

Abstract

The invention relates to the field of engineering machinery, and discloses a skid-steer loader and a movable arm mounting structure thereof. The movable arm comprises two box-type arms arranged in parallel, a front arm connecting piece for connecting the two box-type arms, two bucket oil cylinders arranged on two sides of the movable arm and two oil cylinder supporting plates used for installing the two bucket oil cylinders respectively, the box-type arms comprise an inner side plate and an outer side plate, the oil cylinder supporting plates are arranged between the corresponding inner side plate and the front arm connecting piece, and oil pipes of the bucket oil cylinders are arranged on the inner side of the outer side plate. The oil pipe of the bucket oil cylinder can be arranged in the outline range of the movable arm, so that the structural and operation complexity caused by the fact that the oil pipe passes around the outer side of the movable arm is avoided, and the damage caused by exposure is avoided because the oil pipe cannot be exposed.

Description

Skid-steer loader and movable arm mounting structure thereof

Technical Field

The invention relates to engineering machinery, in particular to a skid steer loader and a movable arm mounting structure thereof.

Background

The skid-steer loader is a small-sized engineering machine with compact structure and flexible action, and a bucket is driven to work by a bucket cylinder arranged on a movable arm. Specifically, a bucket cylinder may be disposed on a single side of the boom or two bucket cylinders may be disposed on both sides of the boom, and in the case of the bucket cylinders disposed on both sides, since the layout space is not enough, an oil pipe of the bucket cylinder needs to be routed from the outside, the structure and operation are complicated, and the exposed oil pipe is also easily damaged.

Disclosure of Invention

The invention aims to overcome the problem that the oil pipe of a bucket cylinder of a skid steer loader is inconvenient to arrange in the prior art, and provides a movable arm of the skid steer loader, which is convenient for arranging the oil pipe of the bucket cylinder.

In order to achieve the above object, an aspect of the present invention provides a boom of a transfer loader, wherein the boom includes two box-type arms arranged in parallel, a boom front connection member connecting the two box-type arms, two bucket cylinders arranged on both sides of the boom, and two cylinder support plates for mounting the two bucket cylinders, respectively, the box-type arms include an inner side plate and an outer side plate, the cylinder support plates are arranged between the corresponding inner side plate and the boom front connection member, and oil pipes of the bucket cylinders are arranged inside the outer side plate.

Optionally, a first oil pipe through hole H1 is provided on the inner side plate, and a second oil pipe through hole H2 is provided on the cylinder support plate.

Optionally, the first oil pipe through hole H1 is disposed at a position of the inner side plate corresponding to the arm front connection member, and/or the second oil pipe through hole H2 is disposed at a position of the cylinder support plate close to the arm front connection member.

Optionally, the box-shaped arm includes a first shaft seat penetrating through the inner side plate and the outer side plate, a second shaft seat corresponding to the first shaft seat is provided on the cylinder support plate, and one end of the bucket cylinder is mounted through a pin shaft penetrating through the first shaft seat and the second shaft seat.

Optionally, the second end of the bucket cylinder is mounted on the lower part of the inner side plate; and/or the second oil pipe through hole H2 is arranged on the lower side of the second shaft seat.

Optionally, an oil separator is arranged on the arm front connecting piece, a first oil pipe extending from the box-type arm penetrates out of the first oil pipe through hole H1 and is connected to an inlet of the oil separator, and two outlets of the oil separator are connected to the corresponding bucket cylinders through second oil pipes respectively and through the second oil pipe through holes H2.

Optionally, the box arm includes a boom rear body disposed between the inner side plate and the outer side plate, and the first oil pipe extends from the boom rear body.

The application further provides a swing arm mounting structure of the skid-steer loader, wherein the swing arm mounting structure comprises a frame and the swing arm of the application, and the swing arm is hinged to the frame.

Optionally, a limiting block corresponding to the cylinder support plate is arranged on the frame, so that the movable arm is in contact with the cylinder support plate through the limiting block when reaching the limit position.

The present application further provides a skid steer loader, wherein, skid steer loader includes the boom mounting structure of the present application.

Through the technical scheme, the oil pipe of the bucket oil cylinder is arranged on the inner side of the outer side plate, namely in the outline range of the movable arm, so that the structural and operation complexity caused by the fact that the oil pipe passes around the outer side of the movable arm is avoided, and the damage caused by exposure is avoided because the oil pipe cannot be exposed.

Drawings

FIG. 1 is a perspective view of one embodiment of a boom of the skid steer loader of the present application;

FIG. 2 is another angular perspective view of FIG. 1;

FIG. 3 is a perspective view of the box arm and boom attachment of the boom of FIG. 1;

fig. 4 is another angular perspective view of fig. 3.

Description of the reference numerals

10-movable arm, 11-box type arm, 111-inner side plate, 112-outer side plate, 113-movable arm rear body, 12-arm front connecting piece, 121-oil separator installation part, 13-bucket oil cylinder, 14-oil cylinder supporting plate, 15-first shaft seat, 16-second shaft seat, 17-pin shaft, 18-first oil pipe, 19-second oil pipe, 20-vehicle frame and 21-limiting block.

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

In the present invention, the use of directional terms such as "upper, lower, left, right" generally means upper, lower, left, right as viewed with reference to the accompanying drawings, unless otherwise specified; "inner and outer" refer to the inner and outer relative to the profile of the components themselves. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

According to an aspect of the present application, there is provided a boom of a skid steer loader, wherein the boom 10 includes two box-type arms 11 arranged in parallel, a front arm connecting member 12 connecting the two box-type arms 11, two bucket cylinders 13 arranged at both sides of the boom 10, and two cylinder supporting plates 14 for respectively mounting the two bucket cylinders 13, the box-type arms 11 include an inner side plate 111 and an outer side plate 112, the cylinder supporting plates 14 are arranged between the corresponding inner side plate 111 and the front arm connecting member 12, and an oil pipe of the bucket cylinder 13 is arranged inside the outer side plate 112.

The oil pipe of the bucket cylinder 13 is arranged inside the outer side plate, that is, within the outline of the boom 10, thereby avoiding the complexity of structure and operation caused by passing around the outside of the boom 10, and avoiding the damage caused by exposure because of no exposure.

Specifically, a corresponding oil pipe penetrating structure may be provided on the component inside the outer panel 112. For example, the inner side plate 111 may be provided with a first oil passage hole H1, and the cylinder support plate 14 may be provided with a second oil passage hole H2. Therefore, the oil pipe of the bucket cylinder 13 can be conveniently arranged in the contour range of the movable arm 10 through the first oil pipe through hole H1 and the second oil pipe through hole H2, the structural complexity and the operation complexity caused by the fact that the oil pipe passes by the outer side of the movable arm 10 in a winding mode are avoided, and the damage caused by exposure is avoided because the oil pipe is not exposed.

By providing the first oil pipe passing hole H1 and the second oil pipe passing hole H2, the oil pipe of the bucket cylinder 13 can be set as required. For example, the arm front connecting member 12 is provided with an oil separator, a first oil pipe 18 extending from the box-type arm 11 passes through the first oil pipe passing hole H1 and is connected to an inlet of the oil separator, and two outlets of the oil separator are connected to the corresponding bucket cylinders 13 through second oil pipes 19 and second oil pipe passing holes H2, respectively. As shown in fig. 3, the arm front connection member 12 is provided with an oil separator mounting part 121 for mounting an oil separator, and the oil separator mounting part 121 is formed in a cross shape to correspond to each opening of the oil separator. Specifically, the first oil pipe 18 extends from the first oil pipe passing hole H1 to the lower side of the oil separator mounting portion 121 in fig. 3, and the second oil pipe 19 extends from the left and right sides of the oil separator mounting portion 121 in fig. 3 to the corresponding inner side plates 111 and is connected to the bucket cylinder 13 via the second oil pipe passing hole H2.

In order to reduce the length of the oil pipe in a penetrating way, the positions of the first oil pipe through hole H1 and the second oil pipe through hole H2 can be reasonably set so as to optimize the oil pipe arrangement path. Preferably, as shown in fig. 1 and 4, the first oil passage hole H1 may be provided at a position of the inner side plate 111 corresponding to the arm front connection member 12. Likewise, the second oil passage hole H2 may be provided in the cylinder support plate 14 near the boom attachment 12.

In addition, a corresponding structure can be provided as required to mount the bucket cylinder 13. Specifically, as shown in fig. 1, 2 and 3, the box-type arm 11 includes a first shaft base 15 passing through the inner side plate 111 and the outer side plate 112, the cylinder support plate 14 is provided with a second shaft base 16 corresponding to the first shaft base 15, and one end of the bucket cylinder 13 is mounted by a pin 17 passing through the first shaft base 15 and the second shaft base 16. The pin 17 can thus be inserted into the first bearing block 15 and the second bearing block 16 from outside the arm 10 for installation and maintenance.

One end of the bucket cylinder 13 is supported and mounted by a cylinder support plate 14, and the other part of the bucket cylinder 13 may be mounted at other suitable positions. For example, as shown in fig. 1, the second end of the bucket cylinder 13 is mounted (e.g., hinged) to the lower portion of the inner side plate 111.

To avoid that the hinged rotation of the bucket cylinder 13 relative to the box arm 11 damages the oil pipe (second oil pipe 19), the oil pipe can be bypassed around the end of the bucket cylinder 13 at the pin 17. Specifically, the second oil pipe through hole H2 is disposed on the lower side of the second bearing block 16.

In addition, most of the first oil pipe 18 is accommodated in the box-type arm 11, and only the tip end portion thereof protrudes from the first oil pipe passing hole H1 and is connected to the oil separator. Specifically, the box-type arm 11 includes a boom rear body 113 provided between the inner side plate 111 and the outer side plate 112, and the first oil pipe 18 extends from the boom rear body 113. Wherein boom rear body 113 may be provided as a tubular structure having a cavity to allow first oil pipe 18 to be perforated.

According to another aspect of the present application, there is provided a boom mounting structure of a skid steer loader, wherein the boom mounting structure includes a frame 20 and a boom 10 of the present application, and the boom 10 is hinged to the frame 20.

The oil pipe of the bucket cylinder 13 can be conveniently arranged within the contour range of the boom 10 through the first oil pipe through hole H1 and the second oil pipe through hole H2, thereby avoiding the complexity of structure and operation caused by passing around the outer side of the boom 10, and avoiding the damage caused by exposure, particularly the damage caused by the movement of the boom 10 relative to the frame 20, because the oil pipe is not exposed.

Preferably, the rotation of the boom 10 may be limited by the cylinder support plate 14. Specifically, as shown in fig. 1 and 2, a limit block 21 corresponding to the cylinder support plate 14 may be disposed on the frame 20, so as to contact the cylinder support plate 14 through the limit block 21 when the boom 10 reaches the limit position. Specifically, stopper 21 may be provided on a surface of frame 20 facing the bottom side of boom 10, so as to restrict boom 10 from further descending by contact of stopper 21 with the bottom surface of cylinder support plate 14 when boom 10 rotates to descend to the lowest position.

According to another aspect of the present application, there is provided a skid steer loader comprising the boom mounting structure of the present application.

The oil pipe of the bucket cylinder 13 can be conveniently arranged in the outline range of the movable arm 10 through the first oil pipe through hole H1 and the second oil pipe through hole H2, so that the structural and operation complexity caused by the fact that the oil pipe passes around the outer side of the movable arm 10 is avoided, the damage caused by exposure is avoided due to the fact that the oil pipe is not exposed, the safety of the skid-steer loader is improved, and the service life of the skid-steer loader is prolonged.

The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, many simple modifications can be made to the technical solution of the invention. The present application includes the combination of individual features in any suitable manner. The invention is not described in detail in order to avoid unnecessary repetition. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.

Claims

1. The movable arm of the skid steer loader is characterized in that the movable arm (10) comprises two box-type arms (11) which are arranged in parallel, a front arm connecting piece (12) for connecting the two box-type arms (11), two bucket oil cylinders (13) which are arranged on two sides of the movable arm (10) and two oil cylinder supporting plates (14) which are respectively used for installing the two bucket oil cylinders (13), the box-type arms (11) comprise inner side plates (111) and outer side plates (112), the oil cylinder supporting plates (14) are arranged between the corresponding inner side plates (111) and the front arm connecting piece (12), and oil pipes of the bucket oil cylinders (13) are arranged on the inner sides of the outer side plates (112).

2. The boom of a skid steer loader of claim 1, wherein a first oil passage hole H1 is provided on the inner side plate (111), and a second oil passage hole H2 is provided on the cylinder support plate (14).

3. The boom of a skid steer loader according to claim 2, wherein the first oil pipe through hole H1 is provided at a position of the inner side plate (111) corresponding to the arm front attachment (12), and/or the second oil pipe through hole H2 is provided at a position of the cylinder support plate (14) adjacent to the arm front attachment (12).

4. The boom of a skid steer loader according to claim 2, wherein the box arm (11) comprises a first shaft seat (15) disposed through the inner side plate (111) and the outer side plate (112), the cylinder support plate (14) is provided with a second shaft seat (16) corresponding to the first shaft seat (15), and one end of the bucket cylinder (13) is mounted by a pin (17) disposed through the first shaft seat (15) and the second shaft seat (16).

5. The boom of a skid steer loader of claim 4, wherein a second end of the bucket cylinder (13) is mounted to a lower portion of the inner side plate (111); and/or, the second oil pipe through hole H2 is arranged at the lower side of the second shaft seat (16).

6. The boom of a skid steer loader according to any one of claims 2 to 5, wherein an oil separator is provided on the boom nose attachment (12), a first oil pipe (18) extending from the box-type boom (11) is led out from the first oil pipe passing hole H1 and connected to an inlet of the oil separator, and two outlets of the oil separator are connected to the corresponding bucket cylinders (13) through the second oil pipe passing holes H2 by second oil pipes (19), respectively.

7. The boom of a skid steer loader of claim 6, wherein the box arm (11) comprises a boom back (113) disposed between the inner side plate (111) and the outer side plate (112), the first oil pipe (18) extending from the boom back (113).

8. A boom mounting structure of a skid steer loader, characterized in that the boom mounting structure comprises a frame (20) and a boom (10) according to any of claims 1-7, the boom (10) being hinged to the frame (20).

9. The boom mounting structure of a skid steer loader according to claim 8, wherein a stopper block (21) corresponding to the cylinder support plate (14) is provided on the frame (20) to contact the cylinder support plate (14) through the stopper block (21) when the boom (10) reaches a limit position.

10. A skid steer loader comprising the boom mounting structure of claim 8 or 9.