Triangular track assembly and tractor

Abstract

The utility model provides a triangular track assembly and a tractor. Comprising a driving wheel, a pivot, an upper support, a lower support, a chain link, a first suspension part and a second suspension part, and the pivot is arranged on the outer side of the driving wheel and integrally rotates with the driving wheel; the upper support comprises a sleeve part rotationally installed on the pivot, a first oblique arm part arranged on the front side of the sleeve part and a second oblique arm part arranged on the rear side of the sleeve part. The lower bracket is arranged below the upper bracket, and the front end of the lower bracket is rotationally connected with the first inclined arm part; the rear end of the lower support is rotationally connected with the second oblique arm portion through a chain link, the first suspension part is arranged at the front end of the first oblique arm portion, the second suspension part is arranged at the rear end of the second oblique arm portion through the first attachment part, and the second suspension part and the first suspension part are symmetrically arranged on the two sides of the vertical plane where the central axis of the sleeve portion is located. It is guaranteed that the gravity center of the triangular track assembly is located between the first hanging piece and the second hanging piece, the hoisting stability is guaranteed, and safe and stable hoisting operation is achieved.

Description

Technical Field

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

[0002] High-horsepower tractors are mainly available in wheeled and tracked models. Different models are required for different terrains. To leverage the advantages of both, some manufacturers have designed a triangular track assembly that allows for interchangeability between the tractor's triangular track assembly and the tires. However, the triangular track assembly is relatively large, requiring auxiliary equipment for lifting. The unique structure of the triangular track assembly leads to uneven force distribution during lifting, hindering installation and even creating safety hazards. Therefore, it is necessary to provide a triangular track assembly and tractor that overcomes these shortcomings. 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 and a tractor are provided. Taking the forward direction of the triangular track assembly as the front, the assembly includes: a drive wheel; a pivot, which is disposed outside the drive wheel and rotates integrally with the drive wheel; an upper support, which includes a sleeve portion rotatably mounted on the pivot, a first inclined arm portion disposed on the front side of the sleeve portion, and a second inclined arm portion disposed on the rear side of the sleeve portion; a lower support, which is disposed below the upper support, and the front end of the lower support is rotatably connected to the first inclined arm portion; a chain link, which includes a first tie rod and a second tie rod hinged to each other, the other end of the first tie rod being rotatably connected to the second inclined arm portion, and the other end of the second tie rod being rotatably connected to the rear end of the lower support; a first suspension member, which is disposed at the front end of the first inclined arm portion; and a second suspension member, which is disposed at the rear end of the second inclined arm portion via a first attachment member, and the second suspension member and the first suspension member are symmetrically disposed on both sides of the vertical plane containing the central axis of the sleeve portion.

[0005] Preferably, it further includes a third suspension member, which is located above the central axis of the sleeve portion and is fixed to the first and second inclined arms portions by a second attachment member.

[0006] Preferably, the first suspension member, the second suspension member, and the third suspension member are all lifting lugs.

[0007] Preferably, the first inclined arm and the second inclined arm are integral structures. The first inclined arm and the second inclined arm include a first side plate, a second side plate, and a connecting plate disposed between the first side plate and the second side plate. The first side plate and the second side plate are provided with mortise grooves, and the connecting plate is provided with tenons on both connecting edges. The tenons are fitted into the mortise grooves to realize the positioning of the first side plate and the connecting plate, and the second side plate and the connecting plate. The first side plate and the connecting plate, and the second side plate and the connecting plate are connected by welding.

[0008] Preferably, the upper part of the first side plate and the second side plate is provided with a groove, the groove is fitted into the sleeve, and the first side plate and the sleeve, the second side plate and the sleeve, and the connecting plate and the sleeve are all connected by welding.

[0009] Preferably, the first side plate protrudes from the connecting plate in the region near the sleeve portion to form a fourth mounting portion, and the second attachment is mounted on the fourth mounting portion.

[0010] Preferably, the lower support includes a third side plate, a fourth side plate, a first limiting plate disposed between the third side plate and the fourth side plate, and a second limiting plate disposed between the third side plate and the fourth side plate. The first limiting plate and the second limiting plate are respectively disposed on the movement trajectory of the second pull rod in front and behind. When the rotation angle of the second pull rod is greater than a threshold, the second pull rod will interfere with the first limiting plate and the second limiting plate.

[0011] Preferably, the third and fourth side plates are provided with mortises, and the two connecting edges of the first and second limiting plates are provided with tenons. The tenons are fitted into the mortises to achieve the positioning of the first limiting plate, the second limiting plate, the third side plate, and the fourth side plate. The first limiting plate, the second limiting plate, the third side plate, and the fourth side plate are connected by welding.

[0012] Preferably, the front end of the lower support is rotatably provided with a first mounting part, and a tensioning actuator is provided between the first mounting part and the first inclined arm part. The tensioning actuator includes a hydraulic cylinder and an accumulator integrated on and connected to the hydraulic cylinder.

[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 symmetrically arranging the second and first suspension components on both sides of the vertical plane where the central axis of the sleeve part is located, this utility model ensures that the center of gravity of the triangular track assembly is located between the first and second suspension components, thus ensuring the stability of the lifting operation. Furthermore, by placing the third suspension component above the central axis of the sleeve part, the lifting stability is further enhanced, achieving safe and stable lifting operations. 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. Figure 1 ;

[0017] Figure 2 This is a schematic diagram of the triangular track assembly in this utility model. Figure 2 ;

[0018] Figure 3 This is a schematic diagram of the structure of the upper support, lower support, accumulator and chain link in this utility model;

[0019] Figure 4 This is an exploded view of the upper support in this utility model;

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

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Drive wheels;

[0023] 2. Upper bracket; 21a. First inclined arm; 21b. Second inclined arm; 211. First side plate; 212. Second side plate; 213. Connecting plate; 214. Groove; 215. Fourth mounting part; 22. Sleeve; 23. Tensioning actuator; 231. Hydraulic cylinder; 232. Accumulator; 24. Limiting surface; a. Mortise; b. Tenon;

[0024] 3. Lower bracket; 311. Third side plate; 312. Fourth side plate; 313. First limiting plate; 314. Second limiting plate; 32. First mounting part; 33. Second mounting part; 34. Third mounting part; 35. Limiting component;

[0025] 4. Link; 41. First tie rod; 42. Second tie rod;

[0026] 5a. First idler wheel; 5b. Second idler wheel;

[0027] 6a. The first heavy wheel; 6b. The second heavy wheel;

[0028] 71. First suspension component; 72. Second suspension component; 73. Third suspension component; 74. First attachment component; 75. Second attachment component;

[0029] 8. Tracks. Detailed Implementation

[0030] 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.

[0031] 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."

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] See appendix Figures 1 to 5 This embodiment discloses a triangular track assembly for use in agricultural machinery such as tractors. This embodiment uses a tractor as an example, with the tractor's forward direction considered as "front" and the side closest to the tractor body as "inner side." Unless otherwise specified, the positional relationships between the various components described in this embodiment are the positional relationships between the various components of the triangular track assembly in a horizontal, stationary state.

[0037] See appendix Figure 1 , 2 The drive wheel 1 is mounted on the output shaft of the tractor's drive axle. The inner side of the drive wheel 1 is connected to the output shaft via a spline, and the tractor drives the drive wheel 1 to rotate via the drive axle. A pivot is provided on the outer side of the drive wheel 1. The pivot is coaxial with the output shaft and rotates integrally with the drive wheel 1. The upper bracket 2 is rotatably mounted on the pivot via bearings.

[0038] See appendix Figure 3 The upper support 2 includes a sleeve portion 22, a first inclined arm portion 21a, and a second inclined arm portion 21b. The sleeve portion 22 is loosely fitted onto the pivot via a bearing and can rotate along the pivot. The first inclined arm portion 21a is located on the front side of the sleeve portion 22, and the second inclined arm portion 21b is located on the rear side of the sleeve portion 22. The first inclined arm portion 21a and the second inclined arm portion 21b have an asymmetrical structure.

[0039] See appendix Figure 3 The lower support 3 is positioned below the upper support 2. The front end of the lower support 3 is rotatably connected to the first inclined arm 21a, and the rear end of the lower support 3 is connected to the second inclined arm 21b via a link 4. The link 4 includes a first pull rod 41 and a second pull rod 42 hinged together. The other end of the first pull rod 41 is rotatably connected to the second inclined arm 21b, and the other end of the second pull rod 42 is rotatably connected to the rear end of the lower support 3. The second inclined arm 21b is connected to the lower support 3 via the link 4. The length and tilt angle of the second inclined arm 21b relative to the horizontal plane are both smaller than those of the first inclined arm 21a.

[0040] See appendix Figure 3 A limiting member 35 is provided between the second inclined arm 21b and the second mounting part 33. The limiting member 35 includes a limiting block located above the second mounting part 33 and a limiting surface 24 located below the second inclined arm 21b and corresponding to the limiting block. When the limiting block abuts against the limiting surface 24, the movement of the chain link 4 is limited, thereby achieving the limiting function and preventing the movement of the chain link 4 from being too large or too small, thus ensuring the smoothness of the tractor's driving.

[0041] See appendix Figure 3 A first mounting part 32 is provided at the front end of the lower support 3, which is used to install the first idler wheel 5a. A second mounting part 33 is provided at the rear end of the lower support 3, which is used to install the second idler wheel 5b. A third mounting part 34 is provided in the middle of the second main body, which is used to install the first support wheel 6a and the second support wheel 6b. The track 8 is wound around the drive wheel 1, the first idler wheel 5a, the first support wheel 6a, the second support wheel 6b and the second idler wheel 5b, so that the rotation of the drive wheel 1 causes the track 8 to move.

[0042] The front end of the lower support 3 is rotatably provided with a first mounting part 32. A tensioning actuator 23 is provided between the first mounting part 32 and the first inclined arm part 21a. The tensioning actuator 23 includes a hydraulic cylinder 231 and an accumulator 232 integrated on and connected to the hydraulic cylinder 231.

[0043] When the triangular track assembly traverses a depression or slope, the upper support 2 has a certain sway angle, achieving primary contour-following damping. When the lower support 3 shifts, the first tie rod 41 and the second tie rod 42 rotate relative to each other between the second inclined arm 21b and the rear end of the lower support 3, providing secondary contour-following damping. Simultaneously, the hydraulic cylinder 231 can extend and retract in a timely manner to adapt to changes in the track 8. The accumulator 232 stabilizes the pressure within the hydraulic cylinder 231, ensuring that the entire track 8 remains taut at all times.

[0044] When the triangular track assembly and the tire are interchanged, the triangular track assembly needs to be lifted. Therefore, the triangular track assembly is provided with a first suspension component 71, a second suspension component 72 and a third suspension component 73, and the first suspension component 71, the second suspension component 72 and the third suspension component 73 are all lifting lugs.

[0045] See appendix Figures 1 to 3 The first suspension member 71 is located at the front end of the first inclined arm 21a. Since the first inclined arm 21a and the second inclined arm 21b are asymmetrical structures, the second suspension member 72 is located at the rear end of the second inclined arm 21b via the first attachment member 74. The second suspension member 72 and the first suspension member 71 are symmetrically arranged on both sides of the vertical plane containing the central axis of the sleeve portion 22, ensuring that the center of gravity of the triangular track assembly is located between the first suspension member 71 and the second suspension member 72, thus ensuring the stability of the lifting operation. In addition, the third suspension member 73 is located above the central axis of the sleeve portion 22 and is fixed to the first inclined arm 21a and the second inclined arm 21b via the second attachment member 75, further enhancing the stability of the lifting operation.

[0046] See appendix Figure 3 The first inclined arm 21a and the second inclined arm 21b are integral and asymmetrical structures. During welding, the angles between the first inclined arm 21a and the sleeve 22, and between the second inclined arm 21b and the sleeve 22, are difficult to control. In this embodiment, the structure of the upper support 2 is optimized. Tenons b and mortises a are pre-machined on each welding plate. The welding plates are first positioned and fixed using mortise and tenon joints, and then welded together.

[0047] See appendix Figure 4The first inclined arm 21a and the second inclined arm 21b include a first side plate 211 and a second side plate 212. A connecting plate 213 is disposed between the first side plate 211 and the second side plate 212. A tenon a is provided on the first side plate 211 and the second side plate 212. Tenons b are provided on the two connecting sides of the connecting plate 213. The tenons b are fitted into the tenon a to realize the positioning of the first side plate 211 and the connecting plate 213, and the second side plate 212 and the connecting plate 213. The first side plate 211 and the connecting plate 213, and the second side plate 212 and the connecting plate 213 are connected by welding.

[0048] The first side plate 211 and the second side plate 212 have grooves 214 on their upper parts, which fit into the sleeve portion 22. The first side plate 211 and the sleeve portion 22, the second side plate 212 and the sleeve portion 22, and the connecting plate 213 and the sleeve portion 22 are all connected by welding. After the first inclined arm portion 21a and the second inclined arm portion 21b are installed, they are then assembled and welded to the sleeve portion 22. Compared with the traditional welding process, the welding accuracy is improved and the structural strength of the upper bracket 2 is increased.

[0049] Meanwhile, during the processing of the first side plate 211, a portion of the area is reserved for the installation of the second attachment 75. After welding, a fourth mounting portion 215 is formed by protruding from the connecting plate 213 in the area near the sleeve portion 22. The second attachment 75 is installed on the fourth mounting portion 215 to achieve the installation and fixation of the third suspension member 73.

[0050] The lower support 3 includes a third side plate 311, a fourth side plate 312, a first limiting plate 313 disposed between the third side plate 311 and the fourth side plate 312, and a second limiting plate 314 disposed between the third side plate 311 and the fourth side plate 312. The first limiting plate 313 and the second limiting plate 314 are respectively disposed on the movement trajectory of the front and rear sides of the second pull rod 42. When the rotation angle of the second pull rod 42 is greater than the threshold, the second pull rod 42 will interfere with the first limiting plate 313 and the second limiting plate 314.

[0051] Similarly, to ensure the structural strength of the first limiting plate 313 and the second limiting plate 314, the first limiting plate 313 and the second limiting plate 314 are also fixed by mortise and tenon joints and welding. See Appendix. Figure 5 The third side plate 311 and the fourth side plate 312 are provided with mortise grooves a, and the two connecting edges of the first limiting plate 313 and the second limiting plate 314 are provided with tenons b. The tenons b are fitted into the mortise grooves a to realize the positioning of the first limiting plate 313, the second limiting plate 314, the third side plate 311, and the fourth side plate 312. The first limiting plate 313, the second limiting plate 314, the third side plate 311, and the fourth side plate 312 are connected by welding.

[0052] 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 by, The triangular track assembly advances in a forward direction, comprising: a drive wheel; a pivot shaft arranged outside the drive wheel and rotating integrally with the drive wheel; an upper support comprising a sleeve portion rotatably mounted on the pivot shaft, a first inclined arm portion arranged on the front side of the sleeve portion, and a second inclined arm portion arranged on the rear side of the sleeve portion; a lower support arranged below the upper support, and the front end of the lower support is rotatably connected with the first inclined arm portion; a link comprising a first pull rod and a second pull rod hingedly connected with each other, the other end of the first pull rod is rotatably connected with the second inclined arm portion, and the other end of the second pull rod is rotatably connected with the rear end of the lower support; a first suspension arranged at the front end of the first inclined arm portion; a second suspension arranged at the rear end of the second inclined arm portion through a first attachment, and the second suspension and the first suspension are symmetrically arranged on both sides of the vertical plane of the central axis of the sleeve portion.

2. The triangular track assembly of claim 1, wherein, Further comprising a third suspension arranged above the central axis of the sleeve portion and fixed to the first inclined arm portion and the second inclined arm portion through a second attachment.

3. The triangular track assembly of claim 1, wherein, The first suspension, the second suspension, and the third suspension are all lifting ears.

4. The triangular track assembly of claim 2, wherein, The first inclined arm portion and the second inclined arm portion are integral structures, comprising a first side plate, a second side plate, and a connecting plate arranged between the first side plate and the second side plate, wherein tenon grooves are arranged on the first side plate and the second side plate, and tenons are arranged on the two connecting edges of the connecting plate, the tenons are fitted into the tenon grooves to position the first side plate and the connecting plate and the second side plate and the connecting plate, and the first side plate and the connecting plate and the second side plate and the connecting plate are connected by welding.

5. The triangular track assembly of claim 4, wherein, Recessed portions are arranged on the upper portions of the first side plate and the second side plate, the recessed portions are fitted into the sleeve portion, and the first side plate and the sleeve portion, the second side plate and the sleeve portion, and the connecting plate and the sleeve portion are connected by welding.

6. The triangular track assembly of claim 5, wherein, The first side plate protrudes from the connecting plate to form a fourth mounting portion near the sleeve portion, and the second attachment is mounted on the fourth mounting portion.

7. The triangular track assembly of claim 1, wherein, The lower support comprises a third side plate, a fourth side plate, a first limiting plate arranged between the third side plate and the fourth side plate, and a second limiting plate arranged between the third side plate and the fourth side plate, wherein the first limiting plate and the second limiting plate are respectively arranged on the movement tracks of the front side and the rear side of the second pull rod, and when the rotation angle of the second pull rod is greater than a threshold value, the second pull rod will interfere with the first limiting plate and the second limiting plate.

8. The triangular track assembly of claim 7, wherein, Tenon grooves are arranged on the third side plate and the fourth side plate, tenons are arranged on the two connecting edges of the first limiting plate and the second limiting plate, the tenons are fitted into the tenon grooves to position the first limiting plate, the second limiting plate, and the third side plate and the fourth side plate, and the first limiting plate, the second limiting plate, and the third side plate and the fourth side plate are connected by welding.

9. The triangular track assembly of claim 1, wherein, The front end of the lower support is rotationally provided with a first mounting portion, and a tensioning actuating member is arranged between the first mounting portion and a first inclined arm portion, the tensioning actuating member comprising an oil cylinder and an accumulator integrated on the oil cylinder and connected with the oil cylinder.

10. A tractor characterised in that, The triangular track assembly of any one of claims 1 to 9.

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