Triangular track assembly and tractor

Abstract

The utility model provides a triangular track assembly and a tractor. Comprising a support, a driving wheel, a first idle wheel, a second idle wheel, a supporting shaft, a supporting frame, a first thrust wheel, a second thrust wheel and a crawler belt, and the supporting shaft comprises a shaft body arranged in the middle of the support, a spherical part arranged in the middle of the shaft body and a swing body wrapping the spherical part and made of elastic materials; the supporting frame comprises a frame body used for installing the first thrust wheel and the second thrust wheel and a sleeve part arranged in the middle of the frame body and connected to the swing body in a sleeving mode, and the caterpillar band is wound across the driving wheel, the first idle wheel, the first thrust wheel, the second thrust wheel and the second idle wheel, so that rotation of the driving wheel causes movement of the caterpillar band. According to the utility model, the spherical part and the swinging body are arranged on the supporting shaft, so that the first thrust wheel and the second thrust wheel are changed along the inside and outside directions along with the change of the terrain, and the profiling damping function is further realized.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery technology, and in particular to a triangular track assembly and a tractor. Background Technology

[0002] In related technologies, in a triangular track assembly, the track roller assembly is fixedly mounted under the track device frame, and the guide rollers on both sides support the track's contact with the ground. When the track device traverses complex terrain, the track rollers arranged in the front-to-back direction can swing, but the track rollers arranged in the left-to-right direction do not have a contour-following function. When there is a large height difference in the left-to-right direction, it will cause unnecessary wear on the track, or even cause it to detach from the track. Therefore, it is necessary to provide a triangular track assembly and tractor to overcome the above-mentioned defects. Utility Model Content

[0003] The purpose of this utility model is to provide a triangular track assembly and a tractor.

[0004] According to one aspect of the present invention, a triangular track assembly is provided, comprising: a bracket; a drive wheel; a first idler wheel located below the drive wheel and disposed at the front end of the bracket; a second idler wheel located below the drive wheel and disposed at the rear end of the bracket; a support shaft, the support shaft comprising a shaft body disposed at the middle position of the bracket, a spherical portion disposed at the middle position of the shaft body, and a rocker body made of elastic material and enclosing the spherical portion; and a support frame, the support frame comprising a frame body and a sleeve disposed at the middle of the frame body and sleeved on the rocker body. The frame includes a first shaft located at the front end of the frame body and rotating integrally with the frame body, and a second shaft located at the rear end of the frame body and rotating integrally with the frame body; a first support roller assembly, comprising two first support rollers rotatably mounted at both ends of the first shaft via bearings; a second support roller assembly, comprising two first support rollers rotatably mounted at both ends of the first shaft via bearings; and a track wound around the drive wheel, a first idler wheel, a first support roller, a second support roller, and a second idler wheel, such that rotation of the drive wheel causes movement of the track.

[0005] Preferably, the outer circumference of the central region of the rocker body is a cylindrical surface, the outer circumference of the two end regions of the rocker body is a conical surface, and the connection between the conical surface and the cylindrical surface is a transition surface.

[0006] Preferably, the two ends of the rocker body are provided with slots with a conical structure.

[0007] Preferably, a first end cap and a second end cap are respectively provided on the outer peripheral surfaces of the two ends of the rocker body. The first end cap extends along a transition surface to one end face of the rocker body, and the second end cap extends along another transition surface to the other end face of the rocker body.

[0008] Preferably, the inner surface of the sleeve is provided with an annular step and an annular groove, the annular step and the annular groove are spaced apart by a predetermined gap, and a retaining spring is engaged on the annular groove. The first end cap, the rocker body and the second end cap are sequentially fixed from the retaining spring to the annular step.

[0009] Preferably, a spacer is also provided between the retaining ring and the first end cap.

[0010] Preferably, the front end of the frame body is provided with an arc-shaped bayonet, and at least two U-shaped buckles are provided on the front end of the frame body, and the first shaft is fixedly installed on the corresponding arc-shaped bayonet by the U-shaped buckles.

[0011] Preferably, the rear end of the frame body is provided with an arc-shaped bayonet, and at least two U-shaped buckles are provided on the rear end of the frame body, and the second shaft is fixedly installed on the corresponding arc-shaped bayonet through the U-shaped buckles.

[0012] Preferably, the gap between the two first rollers is greater than the width of the inner tooth block of the track, and the gap between the two second rollers is greater than the width of the inner tooth block of the track.

[0013] According to another aspect of the present invention, a tractor is provided, including the aforementioned triangular track assembly.

[0014] Compared with the prior art, the triangular track assembly and tractor provided by this utility model have the following beneficial effects: By setting a spherical part and a rocker body on the support shaft, when the track changes displacement along the axial direction (i.e., the inner and outer directions) of the support shaft, the rocker body will deform, so that the first and second heavy rollers change along the inner and outer directions with the terrain, thereby realizing the conformal shock absorption function. At the same time, the plasticity of the rocker body can also reduce the impact of ground changes on the tractor. Attached Figure Description

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0016] Figure 1 This is a schematic diagram of the triangular track assembly in this utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the support roller assembly of this utility model;

[0018] Figure 3This is an exploded view of the support roller assembly of this utility model;

[0019] Figure 4 This is a cross-sectional schematic diagram of the support roller assembly of this utility model;

[0020] Figure 5 This is a cross-sectional schematic diagram of the support shaft in this utility model;

[0021] Figure 6 The support shaft in this utility model ( Figure 4 A magnified view of a section at point A in the middle;

[0022] Figure 7 This is a diagram showing the positional relationship between the track roller assembly and the track in this utility model.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Support shaft; 11. Shaft body; 12. Spherical part; 13. Rocker body; 131. Cylindrical surface; 132. Conical surface; 133. Transition surface; 134. Groove part;

[0025] 2. Support frame; 21. Sleeve part; 211. Annular step; 212. Annular groove; 22. Frame body; 221. Front end of frame body; 222. Rear end of frame body; 223. Arc-shaped bayonet; 224. U-shaped buckle; 225. First shaft; 226. Second shaft;

[0026] 3. The first heavy wheel;

[0027] 4. The second heavy wheel;

[0028] 51. First end cap; 52. Second end cap;

[0029] 6. Spacing sheet;

[0030] 7. Snap ring;

[0031] 100, Support frame; 200, Drive wheel; 300, First idler wheel; 400, Second idler wheel; 500, Track; 510, Internal tooth block. Detailed Implementation

[0032] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] To keep the drawings concise, only the parts relevant to this invention are shown schematically in each figure, and they do not represent the actual structure of the product. Furthermore, for ease of understanding, in some figures, only one of the components with the same structure or function is schematically depicted, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one."

[0034] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0035] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0037] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0038] See appendix Figures 1 to 7 This embodiment discloses a triangular track 500 assembly, which is mainly used in agricultural machinery such as tractors. This embodiment takes a tractor as an example for explanation, with the forward direction of the tractor as the front and the side closest to the tractor body as the inner side. The triangular track 500 assembly includes a bracket 100, a drive wheel 200, a first idler wheel 300, a second idler wheel 400, a track roller assembly, and a track 500.

[0039] See appendix Figure 1The drive wheel 200 is mounted on the output shaft of the tractor's drive axle. The inner side of the drive wheel 200 is connected to the output shaft via a spline. The tractor drives the drive wheel 200 to rotate via the drive axle, thereby driving the entire triangular track 500 assembly. The bracket 100 can be rotatably mounted on the mounting shaft of the drive wheel 200 via bearings, or the bracket 100 can be directly mounted on the tractor body. The idler wheels include a first idler wheel 300 located below the drive wheel 200 and at the front end 221 of the bracket 100, and a second idler wheel 400 located below the drive wheel 200 and at the rear end 222 of the bracket 100. The support roller assembly includes a first support roller 3 and a second support roller 4 located in the middle of the bracket 100. The track 500 is wound around the drive wheel 200, the first idler wheel 300, the first support roller 3, the second support roller 4, and the second idler wheel 400, so that the rotation of the drive wheel 200 causes the track 500 to move.

[0040] See appendix Figure 2 , 3 The support roller assembly includes a support shaft 1, a support frame 2 that can swing along its support shaft 1, a first set of support rollers 3 installed at the front end 221 of the support frame 2, and a second set of support rollers 4 installed at the rear end 222 of the support frame 2, so that the first set of support rollers 3 and the second set of support rollers 4 can change along the direction perpendicular to the axial direction of the support shaft 1 (i.e., the forward direction) with the change of terrain, thereby achieving the effect of conformal shock absorption.

[0041] See appendix Figure 4 The support shaft 1 includes a shaft body 11, a spherical part 12 located in the middle of the shaft body 11, and a rocker body 13 wrapped around the spherical part 12 and made of elastic material, which can be rubber. The support frame 2 includes a frame body 22, a sleeve part 21 located in the middle of the frame body 22 and sleeved on the rocker body 13, a first shaft 225 located at the front end 221 of the frame body and rotating integrally with the frame body 22, and a second shaft 226 located at the rear end 222 of the frame body and rotating integrally with the frame body 22.

[0042] See appendix Figure 3 The rear end 222 of the frame body is provided with an arc-shaped latch 223, and at least two U-shaped buckles 224 are provided on the rear end 222 of the frame body. The second shaft 226 is fixedly installed on the corresponding arc-shaped latch 223 through the U-shaped buckles 224. Similarly, the rear end 222 of the frame body is provided with an arc-shaped latch 223, and at least two U-shaped buckles 224 are provided on the rear end 222 of the frame body. The second shaft 226 is fixedly installed on the corresponding arc-shaped latch 223 through the U-shaped buckles 224, so that the first shaft 225 and the second shaft 226 rotate as a unit with the frame body 22.

[0043] When the track 500 undergoes displacement along the axial direction (i.e., the inner and outer directions) of the support shaft 1, the sway body 13 will deform, so that the first and second rollers 3 and 4 change along the inner and outer directions with the terrain, thereby realizing the contour-following shock absorption function. At the same time, the plasticity of the sway body 13 can also reduce the impact of ground changes on the tractor.

[0044] See appendix Figure 5 The inner surface of the rocker body 13 is fitted to the spherical part 12. The outer circumference of the middle region of the rocker body 13 is a cylindrical surface 131, which is locked between the retaining spring 7 and the annular step 211. The outer circumference of the two ends of the rocker body 13 is a conical surface 132. The connection between the conical surface 132 and the cylindrical surface 131 is a transition surface 133, so that the thickness of the rocker body 13 at both ends is approximately the same as the thickness of the rocker body 13 in the middle, ensuring that the rocker body 13 has approximately the same radial stiffness and improving the deformation uniformity of the entire rocker body 13.

[0045] A conical groove 134 is formed on both ends of the rocker body 13. The groove 134 releases part of the internal stress during the compression deformation of the rubber, changes the outward flow deformation of the circumferential surface, thereby avoiding problems such as bulging and excessive deformation on both ends of the rocker body 13, reducing the axial deformation of the rocker body 13 after compression, and ensuring that the rocker body 13 will not interfere with the shaft body 11 during the load-bearing process.

[0046] See attached Figure 4 , 6 The outer peripheral surfaces of the two ends of the rocker body 13 are respectively provided with a first end cap 51 and a second end cap 52. The inner contour of the first end cap 51 and the outer contour of the rocker body 13 are adapted to each other. That is, the first end cap 51 extends along a transition surface 133 to one end face of the rocker body 13, and the second end cap 52 extends along another transition surface 133 to the other end face of the rocker body 13. The first end cap 51 and the second end cap 52 constrain the circumferential outer surface of the two ends of the rocker body 13, preventing radial bulging and causing radial bulging of the rubber layer within the normal load range, thereby improving the reliability and stability of the rocker body 13.

[0047] See attached Figure 4 , 6 The inner surface of the sleeve portion 21 is provided with an annular step 211 and an annular groove 212. The annular step 211 and the annular groove 212 are separated by a predetermined gap, and a retaining spring 7 is engaged on the annular groove 212. The first end cap 51, the rocker body 13 and the second end cap 52 are sequentially fixed from the retaining spring 7 to the annular step 211. The rocker body 13 is installed and fixed by the retaining spring 7 and the annular step 211.

[0048] Furthermore, a spacer 6 is provided between the retaining ring 7 and the first end cap 51. By replacing the spacer 6 with different thicknesses, the user can adjust the distance between the first end cap 51 and the second end cap 52, thereby adjusting the initial axial length of the rocker body 13, adjusting the variable stiffness of the rocker body 13, and compensating for wear of the rocker body 13.

[0049] See attached Figure 7 The gap between the two first support rollers 3 is greater than the width of the inner tooth block 510 of the track 500, and the gap between the two second support rollers 4 is greater than the width of the inner tooth block 510 of the track 500. The inner tooth block 510 of the track 500 is locked between the two first support rollers 3 and the two second support rollers 4 to prevent the track 500 from coming off and to ensure the stability of the entire triangular track 500 assembly.

[0050] It will be apparent to those skilled in the art that various modifications and variations can be made to the exemplary embodiments of the present invention without departing from the spirit and scope of the present invention. Therefore, it is intended that the present invention cover modifications and variations falling within the scope of the appended claims and their equivalents.

Claims

1. A triangular track assembly, characterized in that, include: support; Drive wheel; The first idler wheel is located below the drive wheel and at the front end of the bracket; The second idler wheel is located below the drive wheel and at the rear end of the bracket; The support shaft includes a shaft body located at the middle position of the bracket, a spherical portion located at the middle position of the shaft body, and a rocker body made of elastic material that wraps around the spherical portion; A support frame, comprising a frame body, a sleeve portion disposed in the middle of the frame body and sleeved on the rocker body, a first shaft disposed at the front end of the frame body and rotating integrally with the frame body, and a second shaft disposed at the rear end of the frame body and rotating integrally with the frame body; The first set of heavy rollers includes two first heavy rollers that are rotatably mounted at both ends of the first axle via bearings. The second set of heavy rollers, the first set of heavy rollers includes two first heavy rollers that are rotatably mounted at both ends of the first axle via bearings; A track, which is wound around the drive wheel, a first idler wheel, a first support wheel, a second support wheel, and a second idler wheel, such that rotation of the drive wheel causes movement of the track.

2. The triangular track assembly as described in claim 1, characterized in that, The inner surface of the rocker body is fitted to the spherical part. The outer circumference of the middle region of the rocker body is a cylindrical surface, and the outer circumference of the two end regions of the rocker body is a conical surface. The connection between the conical surface and the cylindrical surface is a transition surface.

3. The triangular track assembly as described in claim 2, characterized in that, The two ends of the rocker body are provided with slots with a conical structure.

4. The triangular track assembly as described in claim 3, characterized in that, The outer peripheral surfaces of the two ends of the rocker body are respectively provided with a first end cap and a second end cap. The first end cap extends along a transition surface to one end face of the rocker body, and the second end cap extends along another transition surface to the other end face of the rocker body.

5. The triangular track assembly as described in claim 4, characterized in that, The inner surface of the sleeve is provided with an annular step and an annular groove. The annular step and the annular groove are spaced apart by a predetermined gap, and a retaining spring is engaged on the annular groove. A first end cap, a rocker body, and a second end cap are sequentially fixed from the retaining spring to the annular step.

6. The triangular track assembly as described in claim 5, characterized in that, A spacer is also provided between the snap ring and the first end cap.

7. The triangular track assembly as described in claim 1, characterized in that, The front end of the frame body is provided with an arc-shaped bayonet, and at least two U-shaped buckles are provided on the front end of the frame body. The first shaft is fixedly installed on the corresponding arc-shaped bayonet through the U-shaped buckles.

8. The triangular track assembly as described in claim 1, characterized in that, The rear end of the frame body is provided with an arc-shaped bayonet, and at least two U-shaped buckles are provided on the rear end of the frame body. The second shaft is fixedly installed on the corresponding arc-shaped bayonet through the U-shaped buckles.

9. The triangular track assembly as described in claim 1, characterized in that, The gap between the two first heavy rollers is greater than the width of the inner tooth block of the track, and the gap between the two second heavy rollers is greater than the width of the inner tooth block of the track.

10. A tractor, characterized in that, Includes the triangular track assembly as described in any one of claims 1 to 9.

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