Thrust wheel, triangular track system and tractor

Abstract

The utility model provides a thrust wheel assembly, a triangular track system and a tractor. The first swing body and the second swing body are arranged at the two connecting points of the lower support and the supporting shaft respectively, the first pin shaft and the second pin shaft are fixedly connected with the lower support, connecting holes in the first swing body, the second swing body and the shaft body are all unthreaded holes, the first swing body can move relatively along the first pin shaft, and the second swing body can move relatively along the second pin shaft. The first swinging body can move relatively along the first pin shaft, the second swinging body can move relatively along the second pin shaft, and the first swinging body and the second swinging body deform to realize the change of the supporting shaft in the left-right direction, so that the capacity of the thrust wheel assembly and the triangular track system changing along with the change of the terrain is improved, and the profiling damping function is further realized; and meanwhile, the plasticity of the swinging body can relieve the impact of ground change on the tractor.

Description

Technical Field

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

[0002] In a triangular track system, the track rollers are mounted under the track frame, and the guide rollers on both sides support the track's contact with the ground. When the track system traverses complex terrain, the track rollers, which are positioned along the front-to-back direction, can swing. However, the track rollers positioned along the left-to-right direction do not have contour-following capabilities. When there is a significant difference in elevation between the left and right sides, it will cause unnecessary wear on the track. Therefore, it is necessary to provide a track roller that overcomes the aforementioned shortcomings. Utility Model Content

[0003] The purpose of this invention is to provide a support roller.

[0004] According to a first aspect of the present invention, a support roller is provided, the support roller being mounted on a lower support of a triangular track system, with the direction of travel of the triangular track system as forward. A first groove and a second groove are provided on the lower support, the first groove and the second groove being spaced a predetermined distance apart in the left-right direction. The support roller includes: a first rocker body, the first rocker body being made of a rigid elastic material and being engaged in the first groove; a second rocker body, the second rocker body being made of a rigid elastic material and being engaged in the second groove; and a support shaft, the support shaft including a shaft body with both ends disposed in the first groove and the second groove, and a shaft body disposed in the middle of the shaft body. A spherical portion at a specific location; a first pin, which passes sequentially through one end of the shaft body and a first rocker body and is fixed in the first groove; a second pin, which passes sequentially through the other end of the shaft body and a second rocker body and is fixed in the second groove; a third rocker body, which encloses the spherical portion and is made of a rigid elastic material; a support frame, which includes a frame body and a sleeve portion located in the middle of the frame body and fitted onto the third rocker body; a first wheel set, which is located at the front end of the frame body; and a second wheel set, which is located at the rear end of the frame body.

[0005] Preferably, the upper surface of the frame body is inclined from the sleeve portion toward the front and rear sides of the supporting frame, respectively.

[0006] Preferably, a first nut is fixed in the first groove, and a third groove is also provided on the first groove. The third groove is located below the first nut, and the first rocker body is fitted into the third groove. The first pin passes through one end of the shaft body and the first rocker body in sequence and is fixed to the first nut.

[0007] Preferably, the inner surface of the third rocker body is fitted to the spherical part, the outer circumference of the middle region of the third rocker body is a cylindrical surface, the two end faces of the third rocker body are provided with slots, and the outer circumference of the two end regions of the third rocker body is a transition surface extending from the cylindrical surface to the slot.

[0008] Preferably, the inner surface of the sleeve portion is provided with a fifth step and a retaining spring, and the third rocker body is engaged between the fifth step and the retaining spring.

[0009] Preferably, the first wheel assembly includes a first axle located at the front end of the frame body and rotating integrally with the frame body. Two first wheel bodies are respectively provided at both ends of the first axle. A first step portion is provided on the first axle. A limiting end cap is provided at the end of the first axle. A second step portion is provided on the inner circumference of the first wheel body. A bushing, a gasket, a first bearing, a second step portion, and a second bearing are sequentially provided between the inner ring of the first wheel body and the first axle and up to the first step portion.

[0010] Preferably, the first wheel body is provided with a first end cap near the middle end of the first shaft, and an oil seal and a dustproof ring are provided between the inner ring of the first end cap and the bushing. A third step and a fourth step are provided on the inner ring of the first end cap, the oil seal is engaged between the third step and the gasket, and the dustproof ring is engaged between the first oil seal and the fourth step.

[0011] Preferably, the limiting end cap and the first shaft are threadedly sealed, the end of the first shaft is provided with a plurality of limiting screw holes, the distance from the limiting screw holes to the center point of the end of the first shaft is equal, and at least one positioning bolt is provided in the limiting end cap and the limiting screw holes.

[0012] According to a second aspect of the present invention, a triangular track system is provided, including the aforementioned track roller.

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

[0014] Compared with the prior art, the track roller provided by this utility model has the following beneficial effects: This utility model sets a first rocker body and a second rocker body at two connection points between the lower bracket and the support shaft, respectively. The first pin and the second pin are fixedly connected to the lower bracket. The connection holes on the first rocker body, the second rocker body and the shaft body are all smooth holes. The first rocker body can move relative to the first pin, and the second rocker body can move relative to the second pin. Through the deformation of the first rocker body and the second rocker body, the support shaft can change in the left and right directions, which improves the ability of the track roller and the triangular track system to change with the terrain, thereby realizing the contour-following 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 structure of the middle support wheel and the lower support frame of this utility model;

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

[0018] Figure 3 This is a schematic diagram of the structure of the lower support in this utility model;

[0019] Figure 4 This is a side view of the middle support roller and the lower support frame of this utility model;

[0020] Figure 5 The connection between the support roller and the lower support in this utility model (i.e. Figure 4 A schematic diagram of the cross-section of section BB (in the middle section);

[0021] Figure 6 This is a partial enlarged view of the connection between the middle support roller and the lower support frame of this utility model;

[0022] Figure 7 The first wheel assembly in this utility model (i.e. Figure 4 A schematic diagram of the cross-section of the C-section.

[0023] Figure 8 This is a partially enlarged view of the first wheel assembly in this utility model;

[0024] Figure 9 The first end cap in this utility model (i.e. Figure 8 A magnified view of a portion of region A in the middle;

[0025] Figure 10 This is a schematic diagram of the triangular track system in this utility model.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1a. First groove; 11a. First nut; 12a. Third groove; 11b. Second nut;

[0028] 2a. First swinging body; 2b. Second swinging body;

[0029] 3. Support shaft; 31. Shaft body; 32. Spherical part;

[0030] 4a. First pin; 4b. Second pin;

[0031] 5. Third rocker body; 51. Cylindrical surface; 52. Groove; 53. Transition surface;

[0032] 6. Support frame; 61. Frame body; 62. Sleeve part; 621. Fifth step part; 622. Snap ring;

[0033] 7a. First wheel assembly; 7b. Second wheel assembly; 71. First axle; 72. First wheel body; 711. First step; 712. Limiting end cap; 7121. Positioning bolt; 713. Bushing; 714. Gasket; 715. First bearing; 716. Second bearing; 721. Second step; 722. First end cap; 7221. Third step; 7222. Fourth step; 7223. Oil seal; 7224. Dust seal; 723. Second end cap;

[0034] 100, Lower support; 200, Upper support; 300, Drive wheel; 400, First idler wheel; 500, Second idler wheel; 600, Track roller; 700, Track. Detailed Implementation

[0035] 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.

[0036] 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."

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] See appendix Figures 1 to 10 This embodiment discloses a support roller 600, which is disposed in a triangular track 700 system. The triangular track 700 system includes: a lower support 100, an upper support 200, a drive wheel 300, a first idler wheel 400, a second idler wheel 500, the support roller 600, and the track 700.

[0042] See appendix Figure 10 The drive wheel 300 is mounted on the output shaft of the tractor's drive axle. The inner side of the drive wheel 300 is connected to the output shaft via a spline. The tractor drives the drive wheel 300 to rotate via the drive axle, thereby driving the entire triangular track 700 assembly. The upper bracket 200 can be rotatably mounted on the mounting shaft of the drive wheel 300 via bearings, or it can be directly mounted on the tractor body. The lower bracket 100 is located below the drive wheel 300 and is flexibly connected to the upper bracket 200. The front end of the lower bracket 100 is provided with a first idler wheel 400, and the rear end of the lower bracket 100 is provided with a second idler wheel 500. The support roller 600 is mounted on the lower bracket 100 of the triangular track 700 system. The track 700 is wound around the drive wheel 300, the first idler wheel 400, the first support roller 600, and the second idler wheel 500, so that the rotation of the drive wheel 300 causes the track 700 to move.

[0043] See appendix Figures 1 to 3 With the direction of travel of the triangular track 700 system as the front, the lower support 100 is provided with a first groove 1a and a second groove, which are spaced apart by a predetermined distance in the left-right direction. The support roller 600 includes: a first rocker body 2a, a second rocker body 2b, a support shaft 3, a first pin 4a, a second pin 4b, a third rocker body 5, a support frame 6, a first wheel set 7a, and a second wheel set 7b.

[0044] See appendix Figure 4The first rocker body 2a is made of a rigid elastic material and is locked in the first groove 1a. The second rocker body 2b is made of a rigid elastic material and is locked in the second groove. The rigid elastic material can maintain high hardness while having good elastic recovery ability. The rigid elastic material includes, but is not limited to, rubber, polyurethane, thermoplastic elastomer, fluororubber or polyimide.

[0045] See appendix Figure 5 The support shaft 3 is located below the lower bracket 100. The support shaft 3 includes a shaft body 31 with both ends located in the first groove 1a and the second groove. The first pin 4a passes through one end of the shaft body 31 and the first rocker body 2a in sequence and is fixed in the first groove 1a. The second pin 4b passes through the other end of the shaft body 31 and the second rocker body 2b in sequence and is fixed in the second groove.

[0046] See appendix Figure 3 , 4 A first nut 11a is fixed inside the first groove 1a. A third groove 12a is also provided on the first groove 1a. The third groove 12a is located below the first nut 11a. The first rocker body 2a is fitted into the third groove 12a. The first pin 4a passes through one end of the shaft body 31 and the first rocker body 2a in sequence and is fixed to the first nut 11a.

[0047] Similarly, a second nut 11b is fixed in the second groove, and a fourth groove is also provided on the second groove. The fourth groove is located below the second nut 11b. The second rocker body 2b is fitted into the fourth groove. The second pin 4b passes through the other end of the shaft body 31 and the second rocker body 2b in sequence and is fixed to the second nut 11b.

[0048] The first nut 11a and the second nut 11b are fixedly connected to the lower bracket 100 by welding. The connecting holes on the first rocker body 2a, the second rocker body 2b and the shaft body 31 are all smooth holes, which can move relative to each other along the first pin 4a or the second pin 4b. The deformation of the first rocker body 2a and the second rocker body 2b realizes the change of the support shaft 3 in the left and right directions, which improves the ability of the track roller 600 and the triangular track 700 system to change with the terrain, thereby realizing the contour-following shock absorption function. At the same time, the plasticity of the rocker body can also reduce the impact of ground changes on the tractor.

[0049] See appendix Figure 6 The support shaft 3 also includes a spherical part 32 located in the middle of the shaft body 31. The third rocker body 5 wraps around the spherical part 32 and is made of a hard elastic material. The inner surface of the third rocker body 5 is fitted to the spherical part 32. The outer periphery of the middle region of the third rocker body 5 is a cylindrical surface 51. The two end faces of the third rocker body 5 are provided with grooves 52. The outer periphery of the two end regions of the third rocker body 5 is a transition surface 53 extending from the cylindrical surface 51 to the groove 52.

[0050] See appendix Figure 6 The support frame 6 includes a frame body 61 and a sleeve portion 62 located in the middle of the frame body 61 and sleeved on the third rocker body 5. The inner surface of the sleeve portion 62 is provided with a fifth step portion 621 and a retaining spring 622. The third rocker body 5 is engaged between the fifth step portion 621 and the retaining spring 622.

[0051] When the track 700 undergoes displacement in the axial direction (i.e., left and right direction) of the support roller 600 on the support shaft 3, the third sway body 5 will deform, so that the first wheel group 7a and the second wheel group 7b change with the terrain, thereby realizing the contour-following shock absorption function. At the same time, the plasticity of the third sway body 5 can also reduce the impact of ground changes on the tractor.

[0052] See appendix Figure 7 The first wheel assembly 7a includes a first shaft 71 located at the front end of the frame body 61 and rotating integrally with the frame body 61, with two first wheels 72 respectively located at both ends of the first shaft 71. The second wheel assembly 7b includes a second shaft located at the rear end of the frame body 61 and rotating integrally with the frame body 61, with two second wheels respectively located at both ends of the second shaft.

[0053] See appendix Figure 8 Taking the installation method of the first wheel body 72 as an example, a first step 711 is provided on the first shaft 71, and a limiting end cap 712 is provided at the end of the first shaft 71. A second step 721 is provided on the inner circumference of the first wheel body 72. A bushing 713, a gasket 714, a first bearing 715, a second step 721, and a second bearing 716 are provided in sequence between the inner ring of the first wheel body 72 and the first shaft 71 and from the first step 711. The first bearing 715 and the second bearing 716 are installed through the limiting end cap 712.

[0054] See appendix Figure 8 The first wheel body 72 has a first end cover 722 and a second end cover 723 at its two ends. The first end cover 722 is located near the middle end of the first shaft 71, and the second end cover 723 covers the end of the first shaft 71. An oil seal 7223 and a dustproof ring 7224 are provided between the inner ring of the first end cover 722 and the bushing 713. A third step portion 7221 and a fourth step portion 7222 are provided on the inner ring of the first end cover 722. The oil seal 7223 is engaged between the third step portion 7221 and the gasket 714. The dustproof ring 7224 is engaged between the first oil seal 7223 and the fourth step portion 7222. The dustproof ring 7224 is provided outside the structure of the oil seal 7223 to protect the structure of the oil seal 7223 and thus ensure the operational stability of the entire first wheel body 72.

[0055] See appendix Figure 9The limiting end cap 712 and the first shaft 71 are sealed by threads. The end of the first shaft 71 is provided with multiple limiting screw holes, and the distance from the limiting screw holes to the center point of the end of the first shaft 71 is equal. At least one positioning bolt 7121 is provided between the limiting end cap 712 and the limiting screw holes. Since the fixing point of the positioning bolt 7121 and the first shaft 71 is not at the center position of the end of the first shaft 71, there will be no relative rotation between the limiting end cap 712 and the limiting screw holes, realizing the self-locking of the limiting end cap 712, thereby ensuring the stability of the first wheel body 72 installation.

[0056] 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 load wheel characterized by, The supporting wheel is arranged on the lower support of the triangular track system, and the triangular track system is arranged in the front direction. The first groove and the second groove are arranged on the lower support, and the first groove and the second groove are arranged at a predetermined interval in the left-right direction. The supporting wheel comprises: The first swing body is made of hard elastic material and is clamped in the first groove. The second swing body is made of hard elastic material and is clamped in the second groove. The supporting shaft comprises a shaft body arranged at both ends of the first groove and the second groove, and a spherical part arranged at the middle position of the shaft body. The first pin shaft passes through the one end of the shaft body, the first swing body and is fixed in the first groove. The second pin shaft passes through the other end of the shaft body, the second swing body and is fixed in the second groove. The third swing body wraps the spherical part and is made of hard elastic material. The supporting frame comprises a frame body and a sleeve part arranged at the middle part of the frame body and sleeved on the third swing body. The first wheel group is arranged at the front end of the frame body. The second wheel group is arranged at the rear end of the frame body.

2. The wheel as set forth in claim 1, characterized in that The upper surface of the frame body is inclined to the front and rear sides of the supporting frame from the sleeve part.

3. The wheel of claim 1, wherein The first nut is fixed in the first groove, and the third groove is arranged on the first groove and below the first nut. The first swing body is embedded in the third groove, and the first pin shaft passes through the one end of the shaft body, the first swing body and is fixed with the first nut.

4. The wheel of claim 1 wherein, The inner surface of the third swing body is arranged in close contact with the spherical part. The outer periphery of the middle region of the third swing body is a cylindrical surface. The two end faces of the third swing body are provided with groove parts. The outer periphery of the two end regions of the third swing body is a transition surface extending from the cylindrical surface to the groove part.

5. The wheel of claim 4, wherein The inner surface of the sleeve part is provided with a fifth step part and a clamping spring, and the third swing body is clamped between the fifth step part and the clamping spring.

6. The wheel of claim 1, wherein The first wheel group comprises a first shaft arranged at the front end of the frame body and rotating integrally with the frame body. Two first wheel bodies are arranged at both ends of the first shaft. The first shaft is provided with a first step part. A limiting end cover is arranged at the end of the first shaft. A second step part is arranged on the inner periphery of the first wheel body. A bushing, a gasket, a first bearing, a second step part and a second bearing are arranged between the inner circle of the first wheel body and the first shaft to the first step part.

7. The wheel of claim 6, wherein A first end cover is arranged at one end of the first wheel body close to the middle of the first shaft. An oil seal and a dustproof ring are arranged between the inner circle of the first end cover and the bushing. A third step part and a fourth step part are arranged on the inner circle of the first end cover. The oil seal is clamped between the third step part and the gasket. The dustproof ring is clamped between the first oil seal and the fourth step part.

8. The wheel of claim 7, wherein The limiting end cover and the first shaft are threadedly sealed. The end of the first shaft is provided with a plurality of limiting screw holes. The distance from the limiting screw hole to the center point of the end of the first shaft is equal. At least one positioning bolt is arranged between the limiting end cover and the limiting screw hole.

9. A triangular track system characterized in that, The load wheel according to any one of claims 1 to 8.

10. A tractor characterised in that, The triangular track system according to claim 9.

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