Skid steer loader, boom and boom mounting structure thereof

Abstract

The present invention relates to the field of engineering machinery, and discloses a skid-steer loader, a boom and a boom mounting structure thereof. The boom comprises two box-shaped arms arranged in parallel, an arm front connecting piece connecting the two box-shaped arms, two bucket cylinders arranged on both sides of the boom, and two cylinder support plates respectively used to mount the two bucket cylinders. The box-shaped arm comprises an inner plate and an outer plate, the cylinder support plate is arranged between the corresponding inner plate and the arm front connecting piece, and the oil pipe of the bucket cylinder is arranged on the inner side of the outer plate. The oil pipe of the bucket cylinder can be arranged within the contour range of the boom, avoiding the structural and operational complexity caused by passing through the outer side of the boom, and avoiding damage caused by exposure because it will not be exposed.

Description

Technical Field

[0001] The invention relates to engineering machinery, in particular to a skid-steer loader and a movable arm and a movable arm mounting structure. Background Art

[0002] The skid steer loader is a small construction machine with a compact structure and flexible movements. The bucket is driven by a bucket cylinder installed on the boom. Specifically, the bucket cylinder can be set on one side of the boom or two bucket cylinders can be set on both sides of the boom. In the case of setting bucket cylinders on both sides, due to insufficient layout space, the oil pipes of the bucket cylinders need to be arranged from the outside, which has a relatively complex structure and operation, and the exposed oil pipes are also easily damaged. Summary of the invention

[0003] The purpose of the present invention is to overcome the problem in the prior art that it is inconvenient to arrange the oil pipe of the bucket cylinder of a skid steer loader, and to provide a boom of a skid steer loader, which is convenient for arranging the oil pipe of the bucket cylinder.

[0004] In order to achieve the above-mentioned objectives, the present invention provides, on one hand, a boom of a transfer loader, wherein the boom includes two box-type arms arranged in parallel, an arm front connecting piece connecting the two box-type arms, two bucket cylinders arranged on both sides of the boom, and two cylinder support plates respectively used to install the two bucket cylinders, the box-type arm includes an inner plate and an outer plate, the cylinder support plate is arranged between the corresponding inner plate and the arm front connecting piece, and the oil pipe of the bucket cylinder is arranged on the inner side of the outer plate.

[0005] Optionally, a first oil pipe through hole H1 is provided on the inner plate, and a second oil pipe through hole H2 is provided on the cylinder support plate.

[0006] Optionally, the first oil pipe through hole H1 is arranged at a position of the inner plate corresponding to the front arm connecting piece, and / or the second oil pipe through hole H2 is arranged at a position of the cylinder support plate close to the front arm connecting piece.

[0007] Optionally, the box-type arm includes a first axle seat arranged through the inner plate and the outer plate, a second axle seat corresponding to the first axle seat is arranged on the cylinder support plate, and one end of the bucket cylinder is installed by a pin shaft arranged through the first axle seat and the second axle seat.

[0008] Optionally, the second end of the bucket cylinder is mounted on the lower portion of the inner plate; and / or the second oil pipe through hole H2 is disposed on the lower side of the second axle seat.

[0009] Optionally, an oil separator is provided on the front connecting member of the arm, and the first oil pipe extending from the box-type arm passes through the first oil pipe through-hole H1 and is connected to the inlet of the oil separator, and the two outlets of the oil separator are respectively connected to the corresponding bucket cylinder through the second oil pipe through the second oil pipe through-hole H2.

[0010] Optionally, the box-type arm includes a boom rear body disposed between the inner plate and the outer plate, and the first oil pipe extends from the boom rear body.

[0011] The present application also provides a boom mounting structure of a skid steer loader, wherein the boom mounting structure comprises a vehicle frame and the boom of the present application, and the boom is hinged to the vehicle frame.

[0012] Optionally, a limit block corresponding to the cylinder support plate is provided on the frame, so that when the boom reaches the limit position, the limit block contacts the cylinder support plate.

[0013] The present application also provides a skid steer loader, wherein the skid steer loader includes the boom mounting structure of the present application.

[0014] Through the above technical solution, the oil pipe of the bucket cylinder is arranged on the inner side of the outer plate, that is, within the contour of the boom, avoiding the structural and operational complexity caused by passing around the outside of the boom, and avoiding damage caused by exposure because it will not be exposed. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a perspective view of an embodiment of a movable arm of a skid steer loader of the present application;

[0016] Figure 2 yes Figure 1 Another angle of the stereogram;

[0017] Figure 3 yes Figure 1 A three-dimensional diagram of a box-type arm and a front connecting piece of a boom;

[0018] Figure 4 yes Figure 3 Another angle of the stereogram.

[0019] Description of Reference Numerals

[0020] 10-boom, 11-box arm, 111-inner plate, 112-outer plate, 113-boom rear body, 12-arm front connecting piece, 121-oil distributor mounting part, 13-bucket cylinder, 14-cylinder support plate, 15-first axle seat, 16-second axle seat, 17-pin shaft, 18-first oil pipe, 19-second oil pipe, 20-frame, 21-limiting block. DETAILED DESCRIPTION

[0021] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0022] In the present invention, unless otherwise specified, the directional words used, such as "upper, lower, left, right", generally refer to the upper, lower, left, and right shown in the accompanying drawings; "inner and outer" refer to the inner and outer relative to the outline of each component itself. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0023] According to one aspect of the present application, a boom of a skid steer loader is provided, wherein the boom 10 includes two box-type arms 11 arranged in parallel, an arm front connecting piece 12 connecting the two box-type arms 11, two bucket cylinders 13 arranged on both sides of the boom 10, and two cylinder support plates 14 for installing the two bucket cylinders 13 respectively, the box-type arm 11 includes an inner plate 111 and an outer plate 112, the cylinder support plate 14 is arranged between the corresponding inner plate 111 and the arm front connecting piece 12, and the oil pipe of the bucket cylinder 13 is arranged on the inner side of the outer plate 112.

[0024] The oil pipe of the bucket cylinder 13 is arranged on the inner side of the outer plate, that is, arranged within the contour of the boom 10, avoiding the structural and operational complexity caused by bypassing the outer side of the boom 10, and avoiding damage caused by exposure because it is not exposed.

[0025] Specifically, a corresponding oil pipe penetration structure may be provided on the components inside the outer plate 112. For example, a first oil pipe through hole H1 may be provided on the inner plate 111, and a second oil pipe through hole H2 may be provided on the oil cylinder support plate 14. Thus, the oil pipe of the bucket oil cylinder 13 may be conveniently provided within the contour of the boom 10 through the first oil pipe through hole H1 and the second oil pipe through hole H2, thereby avoiding the structural and operational complexity caused by bypassing the outer side of the boom 10, and avoiding damage caused by exposure because it will not be exposed.

[0026] By setting the first oil pipe through hole H1 and the second oil pipe through hole H2, the oil pipe of the bucket oil cylinder 13 can be set as needed. For example, an oil distributor is set on the front arm connecting member 12, and the first oil pipe 18 extending from the box-type arm 11 passes through the first oil pipe through hole H1 and is connected to the inlet of the oil distributor. The two outlets of the oil distributor are respectively connected to the corresponding bucket oil cylinder 13 through the second oil pipe 19 and the second oil pipe through hole H2. Figure 3As shown, the arm front connecting member 12 is provided with an oil separator mounting portion 121 for mounting the oil separator, and the oil separator mounting portion 121 is arranged 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 through hole H1 to Figure 3 The lower side of the middle oil distributor mounting portion 121, the second oil pipe 19 is connected from Figure 3 The left and right sides of the middle oil distributor mounting portion 121 extend to the corresponding inner plates 111 respectively and are connected to the bucket cylinder 13 via the second oil pipe through hole H2 .

[0027] In order to reduce the length of the oil pipe, the positions of the first oil pipe through hole H1 and the second oil pipe through hole H2 can be reasonably set to optimize the oil pipe layout path. Figure 1 and Figure 4 As shown, the first oil pipe through hole H1 can be disposed at a position of the inner plate 111 corresponding to the front arm connecting member 12. Similarly, the second oil pipe through hole H2 can be disposed at a position of the oil cylinder support plate 14 close to the front arm connecting member 12.

[0028] In addition, a corresponding structure can be provided as required to install the bucket cylinder 13. Specifically, Figure 1 , Figure 2 and Figure 3 As shown, the box-type arm 11 includes a first axle seat 15 provided through the inner plate 111 and the outer plate 112, a second axle seat 16 corresponding to the first axle seat 15 is provided on the cylinder support plate 14, and one end of the bucket cylinder 13 is installed through a pin 17 provided through the first axle seat 15 and the second axle seat 16. Thus, the pin 17 can be installed into the first axle seat 15 and the second axle seat 16 from the outside of the boom 10 for installation and maintenance.

[0029] One end of the bucket cylinder 13 is supported and installed by the cylinder support plate 14, and the other parts of the bucket cylinder 13 can be installed at other appropriate positions. Figure 1 As shown, the second end of the bucket cylinder 13 is mounted (eg, hinged) to the lower portion of the inner plate 111 .

[0030] To prevent the bucket cylinder 13 from damaging the oil pipe (second oil pipe 19) due to the hinged rotation relative to the box-type arm 11, the oil pipe can be made to bypass the end of the bucket cylinder 13 at the pin 17. Specifically, the second oil pipe through hole H2 is arranged at the lower side of the second shaft seat 16.

[0031] In addition, most of the first oil pipe 18 is accommodated in the box-type arm 11, and only the end portion extends from the first oil pipe through hole H1 and is connected to the oil distributor. Specifically, the box-type arm 11 includes a boom rear body 113 disposed between the inner plate 111 and the outer plate 112, and the first oil pipe 18 extends from the boom rear body 113. The boom rear body 113 can be configured as a tubular structure with a cavity to allow the first oil pipe 18 to pass through.

[0032] According to another aspect of the present application, a boom mounting structure of a skid steer loader is provided, wherein the boom mounting structure includes a frame 20 and the boom 10 of the present application, and the boom 10 is hinged to the frame 20 .

[0033] The oil pipe of the bucket cylinder 13 can be conveniently set within the contour of the boom 10 through the first oil pipe through hole H1 and the second oil pipe through hole H2, avoiding the structural and operational complexity caused by passing around the outside of the boom 10, and since it is not exposed, it avoids damage caused by exposure, especially damage caused by movement of the boom 10 relative to the frame 20.

[0034] Preferably, the oil cylinder support plate 14 can be used to limit the rotation of the boom 10. Specifically, Figure 1 and Figure 2 As shown, the frame 20 may be provided with a limit block 21 corresponding to the cylinder support plate 14, so that when the boom 10 reaches the limit position, the limit block 21 contacts the cylinder support plate 14. Specifically, the limit block 21 may be provided on the surface of the frame 20 facing the bottom side of the boom 10, so that when the boom 10 rotates and descends to the lowest position, the limit block 21 contacts the bottom surface of the cylinder support plate 14 to limit the boom 10 from continuing to descend.

[0035] According to another aspect of the present application, a skid steer loader is provided, wherein the skid steer loader comprises the boom mounting structure of the present application.

[0036] The oil pipe of the bucket cylinder 13 can be conveniently set within the contour of the boom 10 through the first oil pipe through hole H1 and the second oil pipe through hole H2, avoiding the structural and operational complexity caused by passing around the outside of the boom 10, and since it is not exposed, it avoids damage caused by exposure, thereby improving the safety and service life of the skid steer loader.

[0037] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention. The present application includes various specific technical features combined in any suitable manner. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations. However, these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. A movable arm of a skid steer loader, characterized in that: The boom (10) comprises two box-shaped arms (11) arranged in parallel, an arm front connecting piece (12) connecting the two box-shaped arms (11), two bucket cylinders (13) arranged on both sides of the boom (10), and two cylinder support plates (14) for mounting the two bucket cylinders (13), respectively; the box-shaped arm (11) comprises an inner plate (111) and an outer plate (112); the cylinder support plate (14) is arranged between the corresponding inner plate (111) and the arm front connecting piece (12). The oil pipe of the bucket oil cylinder (13) is arranged on the inner side of the outer plate (112); the inner plate (111) is provided with a first oil pipe through hole H1, and the oil cylinder support plate (14) is provided with a second oil pipe through hole H2, the first oil pipe through hole H1 is arranged at a position of the inner plate (111) corresponding to the front arm connecting member (12), and the second oil pipe through hole H2 is arranged at a position of the oil cylinder support plate (14) close to the front arm connecting member (12); An oil separator is provided on the front arm connecting member (12); a first oil pipe (18) extending from the box-type arm (11) passes through the first oil pipe through hole H1 and is connected to the inlet of the oil separator; two outlets of the oil separator are respectively connected to the corresponding bucket cylinder (13) through the second oil pipe through hole H2 via the second oil pipe (19); an oil separator mounting portion (121) for mounting the oil separator is provided on the front arm connecting member (12).

2. The skid steer loader boom according to claim 1, characterized in that: The box-shaped arm (11) includes a first axle seat (15) arranged through the inner plate (111) and the outer plate (112), a second axle seat (16) corresponding to the first axle seat (15) is arranged on the cylinder support plate (14), and one end of the bucket cylinder (13) is installed through a pin shaft (17) arranged through the first axle seat (15) and the second axle seat (16).

3. The skid steer loader boom according to claim 2, characterized in that: The second end of the bucket cylinder (13) is mounted on the lower part of the inner plate (111); and / or the second oil pipe through hole H2 is arranged on the lower side of the second axle seat (16).

4. The skid steer loader boom according to claim 1, characterized in that: The box-type boom (11) comprises a boom rear body (113) arranged between the inner plate (111) and the outer plate (112), and the first oil pipe (18) extends from the boom rear body (113).

5. A boom mounting structure for a skid steer loader, characterized in that: The boom mounting structure comprises a vehicle frame (20) and the boom (10) according to any one of claims 1 to 4, and the boom (10) is hinged to the vehicle frame (20).

6. The boom mounting structure of a skid steer loader according to claim 5, characterized in that: The frame (20) is provided with a limit block (21) corresponding to the oil cylinder support plate (14), so that when the boom (10) reaches the limit position, the limit block (21) contacts the oil cylinder support plate (14).

7. A skid steer loader, characterized in that: The skid steer loader includes the boom mounting structure of claim 5 or 6.

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