A tracked traction machine with adjustable width and variable amplitude

Abstract

This invention belongs to the technical field of tracked traction machines, specifically relating to a tracked traction machine with adjustable width and variable amplitude. It includes a traction machine body and a drive unit and a transmission unit mounted on the body. The transmission unit further includes a secondary track located at the gap between the main tracks and a telescopic mechanism for driving the secondary track to move horizontally. The fixed end of the telescopic mechanism is fixedly connected to the body, and the telescopic end is hinged to the pivot of the secondary track. The secondary track reciprocates along a horizontal plane perpendicular to the traction machine's direction of movement via the telescopic mechanism. Multiple track plates are provided on the circumferential surface of the secondary track's chain via a folding mechanism, and these track plates reciprocate perpendicular to the secondary track surface via the folding mechanism. By adding a deployable or retractable secondary track at the gap between the main tracks, this invention makes the track width of the traction machine adjustable, thus adapting the traction machine to different working environments.

Description

Technical Field

[0001] This invention belongs to the technical field of tracked traction machines, specifically relating to a tracked traction machine with adjustable width and variable amplitude. Background Technology

[0002] Tracked tractors are often used to pull other agricultural machinery, such as rotary tillers and seeders, when planting crops. Due to different working environments, the requirements for the track width of tracked tractors are also different. When the gap between crops is narrow, a tracked tractor with thinner tracks is needed to facilitate movement. However, when the soil moisture is high, thinner tracks are easy to sink into the soft soil, affecting normal operation. Summary of the Invention

[0003] To address the problems existing in the prior art, the present invention provides a tracked tractor with adjustable width and variable amplitude. By adding deployable or retractable secondary tracks in the gaps between the main tracks, the track width of the tractor is adjustable, thereby making the tractor suitable for working environments of different environments.

[0004] The specific technical solution adopted in this invention is as follows:

[0005] An adjustable-width tracked tractor includes a tractor body and a drive unit and a transmission unit mounted on the body. The transmission unit includes a main track and a fixed wheel, a tension wheel, and a ground wheel that are wrapped around and cooperate with the main track. The fixed wheel is located on the upper side of the front end of the main track and is connected to the power output end of the drive unit. The transmission unit also includes a secondary track located at the gap between the main tracks and a telescopic mechanism that drives the secondary track to move horizontally. The fixed end of the telescopic mechanism is fixedly connected to the body, and the telescopic end of the telescopic mechanism is hinged to the pivot of the secondary track. The secondary track reciprocates along a horizontal plane perpendicular to the direction of movement of the tractor by means of the telescopic mechanism. Multiple track plates are provided on the circumferential surface of the chain of the secondary track by means of a folding mechanism. The track plates reciprocate perpendicularly to the surface of the secondary track by means of the folding mechanism.

[0006] The folding mechanism includes a lifting unit located between the chain and track plate of the secondary track, and a power unit that drives the lifting unit to move up and down. The lifting unit includes a first folding rod and a second folding rod that are hinged to each other in an X-shape. The lifting unit also includes a fixed plate and two sets of symmetrical sliding grooves. The fixed plate is fixedly connected to the chain. One set of sliding grooves is fixedly connected to the track plate, and the other set of sliding grooves is fixedly connected to the fixed plate. One end of the first folding rod is hinged to the track plate, and the other end of the first folding rod is hinged to the moving end of the power unit and matches the sliding groove located on one side of the fixed plate. One end of the second folding rod is hinged to the fixed plate, and the other end of the second folding rod matches the sliding groove located on one side of the track plate and has a degree of freedom to move along the sliding groove. The first folding rod has a degree of freedom to move along the sliding groove with the help of the power unit. The lifting unit retracts or unfolds the track plate with the help of the power unit.

[0007] The power unit includes a drive rod, a push-pull frame, and a drive telescopic cylinder. The fixed end of the drive telescopic cylinder is fixedly connected to the telescopic mechanism, and the moving end of the drive telescopic cylinder is fixedly connected to the push-pull frame. One end of the drive rod is hinged to one end of the first folding rod located in the slide groove, and the other end of the drive rod is rotatably connected to the push-pull frame. The drive rod moves by means of the drive telescopic cylinder and drives the lifting unit to form a lifting and lowering mechanism.

[0008] The telescopic mechanism includes a slide rail, a slide base, and a sliding telescopic cylinder. The slide rail is fixedly connected to the machine body, and the track direction of the slide rail is perpendicular to the moving direction of the traction machine and parallel to the horizontal plane. The fixed end of the sliding telescopic cylinder is fixedly connected to the machine body, and the telescopic end of the sliding telescopic cylinder is fixedly connected to one end of the slide base. The other end of the slide base is fixedly connected to the rotating shaft of the auxiliary track. The slide base drives the auxiliary track to reciprocate horizontally with the help of the sliding telescopic cylinder.

[0009] The push-pull frame is a ring-shaped mechanism with a through hole in the center for the rotating shaft to pass through. Multiple drive telescopic cylinders are provided on both sides of the slide. The fixed end of the drive telescopic cylinder is fixedly connected to the slide. The push-pull frame moves repeatedly along the rotating shaft with the help of the drive telescopic cylinders.

[0010] The push-pull frame is provided with a ring-shaped push-pull ring, and the inner side of the push-pull ring is provided with a groove. The end of the drive rod is provided with a driven wheel, which is embedded in the groove and forms a rolling engagement with the groove.

[0011] The folding structure also includes a limiting plate perpendicular to the track plate. One end of the limiting plate is fixedly connected to the end of the track plate, and the other end of the limiting plate faces the fixed plate. The limiting plate is provided with a limiting groove for the drive rod to pass through. Limiting holes are provided on both sides of the limiting groove. The drive rod is provided with a fork-shaped limiting fork. The limiting fork forms an insertion limiting and withdrawal engagement with the limiting holes by means of the extension and retraction of the drive rod.

[0012] When the track plates of the secondary track are in the unfolded state, the lower surface of the track plate located below the secondary track is higher than the lower surface of the main track.

[0013] The beneficial effects of this invention are:

[0014] This invention adds a secondary track in the gap between the main track. When the gap between crops is narrow, the secondary track is hidden within the gap of the main track, which does not obstruct the normal movement of the main track between crops and avoids collisions that could damage them. When the soil moisture is high, the secondary track extends out of the gap between the main track with the assistance of a telescopic mechanism and runs parallel to the main track. Then, with the assistance of a folding mechanism, the track plates on the surface of the secondary track unfold, and the secondary track and the thinner main track combine to form a wider track, thus adapting to soil with high moisture content. Through the unfolding and concealment of the secondary track, the track width of the tractor of this invention is adjustable, making the tractor suitable for working environments of different environments. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention;

[0016] Figure 2 A schematic diagram showing the auxiliary track in an inactive state;

[0017] Figure 3 A schematic diagram of a structure where the secondary track extends but the track pads are not deployed;

[0018] Figure 4 A schematic diagram of a structure with the secondary track extended and the track pads unfolded;

[0019] Figure 5 This is an enlarged schematic diagram of the lifting unit when the track pads are deployed.

[0020] Figure 6 This is a schematic diagram of the side structure at the limiting plate.

[0021] In the attached diagram, 1 is the machine body, 2 is the main track, 3 is the secondary track, 4 is the shaft, 5 is the chain, 6 is the track plate, 7 is the first folding rod, 8 is the second folding rod, 9 is the fixing plate, 10 is the slide groove, 11 is the drive rod, 12 is the push-pull frame, 13 is the drive telescopic cylinder, 14 is the slide rail, 15 is the slide seat, 16 is the sliding telescopic cylinder, 17 is the push-pull ring, 18 is the driven wheel, 19 is the limiting plate, 20 is the limiting groove, 21 is the limiting hole, and 22 is the limiting fork. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0023] Specific embodiment 1, such as Figure 1-5As shown, the present invention provides a tracked tractor with adjustable width and variable amplitude, including a tractor body 1 and a drive unit and a transmission unit disposed on the body 1. The transmission unit includes a main track 2 and a fixed wheel, a tension wheel and a ground wheel that are wrapped in and cooperate with the main track 2. The fixed wheel is located on the upper side of the front end of the main track 2 and is connected to the power output end of the drive unit. The transmission unit also includes a secondary track 3 located at the gap of the main track 2 and a telescopic mechanism that drives the secondary track 3 to move horizontally. The fixed end of the telescopic mechanism is fixedly connected to the body 1, and the telescopic end of the telescopic mechanism is hinged to the pivot 4 of the secondary track 3. The secondary track 3 reciprocates along a horizontal plane perpendicular to the direction of movement of the tractor by means of the telescopic mechanism. Multiple track plates 6 are provided on the periphery of the chain 5 of the secondary track 3 by means of a folding mechanism. The track plates 6 reciprocate along the surface of the secondary track 3 by means of the folding mechanism.

[0024] Due to varying work site environments, the required track width for tracked tractors differs. When the gaps between crops are narrow, a tracked tractor with thinner tracks is needed for easier movement. However, when soil moisture is high, thinner tracks can easily sink into soft soil, affecting normal operation. Therefore, this invention adds a secondary track 3 at the gaps between the main tracks 2. When the gaps between crops are narrow, the secondary track 3 is hidden within the gaps of the main tracks 2, preventing the main tracks 2 from obstructing normal movement between crops and avoiding damage from collisions. When soil moisture is high, the secondary track 3 extends out of the gaps between the main tracks 2 with the assistance of a telescopic mechanism and runs parallel to the main tracks 2. Then, with the assistance of a folding mechanism, the track plates 6 on the surface of the secondary track 3 unfold, and the secondary track 3, together with the thinner main tracks 2, forms a wider track, thus adapting to higher soil moisture. Through the unfolding and concealing of the secondary track 3, the track width of the tractor of this invention is adjustable, making the tractor suitable for work sites in different environments.

[0025] like Figure 2-5As shown, the folding mechanism includes a lifting unit located between the chain 5 and the track plate 6 of the secondary track 3, and a power unit that drives the lifting unit to lift. The lifting unit includes a first folding rod 7 and a second folding rod 8 that are hinged to each other in an X-shape. The lifting unit also includes a fixed plate 9 and two sets of symmetrical sliding grooves 10. The fixed plate 9 is fixedly connected to the chain 5. One set of sliding grooves 10 is fixedly connected to the track plate 6, and the other set of sliding grooves 10 is fixedly connected to the fixed plate 9. One end of the first folding rod 7 is hinged to the track plate 6, and the other end of the first folding rod 7 is hinged to the moving end of the power unit and matches the sliding groove 10 located on one side of the fixed plate 9. One end of the second folding rod 8 is hinged to the fixed plate 9, and the other end of the second folding rod 8 matches the sliding groove 10 located on one side of the track plate 6 and has a degree of freedom to move along the sliding groove 10. The first folding rod 7 has a degree of freedom to move along the sliding groove 10 with the help of the power unit. The lifting unit retracts or unfolds the track plate 6 with the help of the power unit. In this invention, a lifting platform is formed by a set of folding rods that are hinged together in an X-shape. Since the ends of the first folding rod 7 and the second folding rod 8 on the same side are hinged to the track plate 6 and the fixed plate 9 respectively and are fixed in position, and the other ends of the first folding rod 7 and the second folding rod 8 have the degree of freedom to move along the slide 10, when the end of the first folding rod 7 located at the slide 10 moves under the drive of the power unit, the first folding rod 7 and the second folding rod 8 will open or retract in a scissor-like manner, thereby driving the track plate 6 to rise and fall.

[0026] like Figure 2-5 As shown, the power unit includes a drive rod 11, a push-pull frame 12, and a drive telescopic cylinder 13. The fixed end of the drive telescopic cylinder 13 is fixedly connected to the telescopic mechanism, and the moving end of the drive telescopic cylinder 13 is fixedly connected to the push-pull frame 12. One end of the drive rod 11 is hinged to one end of the first folding rod 7 located in the slide groove 10, and the other end of the drive rod 11 is rotatably connected to the push-pull frame 12. The drive rod 11 moves with the help of the drive telescopic cylinder 13 and drives the lifting unit to form a lifting and lowering motion. When the track plate 6 needs to be unfolded, the telescopic end of the drive telescopic cylinder 13 extends and drives the push-pull frame 12 and the drive rod 11 to move to the far end. The hinge points of the first folding rod 7 and the second folding rod 8 with the slide groove 10 can only move to the far end along the slide groove 10, thereby raising the lifting unit and unfolding the track plate 6. Similarly, when the track plate 6 needs to be retracted, the telescopic end of the drive telescopic cylinder 13 retracts.

[0027] like Figure 2-4As shown, the telescopic mechanism includes a slide rail 14, a slide block 15, and a sliding telescopic cylinder 16. The slide rail 14 is fixedly connected to the machine body 1. The track direction of the slide rail 14 is perpendicular to the moving direction of the traction machine and parallel to the horizontal plane. The fixed end of the sliding telescopic cylinder 16 is fixedly connected to the machine body 1, and the telescopic end of the sliding telescopic cylinder 16 is fixedly connected to one end of the slide block 15. The other end of the slide block 15 is fixedly connected to the rotating shaft 4 of the secondary track 3. The slide block 15 drives the secondary track 3 to move back and forth in the horizontal direction by means of the sliding telescopic cylinder 16. In order to enable the secondary track 3 to switch between hiding in the gap of the main track 2 and extending out of the main track 2, a telescopic mechanism is provided. When the secondary track 3 needs to be used, the telescopic end of the sliding telescopic cylinder 16 extends. Since the telescopic end of the sliding telescopic cylinder 16 is fixedly connected to the rotating shaft 4 of the secondary track 3, the sliding telescopic cylinder 16 will drive the secondary track 3 to extend out of the gap of the main track 2. When the secondary track 3 needs to be hidden, the telescopic end of the sliding telescopic cylinder 16 can be retracted.

[0028] like Figure 2-4 As shown, the push-pull frame 12 is a ring-shaped mechanism. The center of the push-pull frame 12 is provided with a through hole for the rotating shaft 4 to pass through. Multiple drive telescopic cylinders 13 are provided on both sides of the slide 15. The fixed end of the drive telescopic cylinder 13 is fixedly connected to the slide 15. The push-pull frame 12 moves repeatedly along the rotating shaft 4 with the help of the drive telescopic cylinders 13. In order to avoid the push-pull frame 12 from obstructing the movement of the rotating shaft 4 of the auxiliary track 3, the push-pull frame 12 of the present invention is a ring-shaped structure, and the rotating shaft 4 passes through the central ring of the push-pull frame 12. In addition, in order to ensure the smooth movement of the push-pull frame 12, the drive telescopic cylinders 13 are symmetrically arranged on both sides of the rotating shaft 4 to avoid shaking during the extension and retraction of the push-pull frame 12.

[0029] like Figure 2-4 As shown, the push-pull frame 12 is provided with a ring-shaped push-pull ring 17. The inner side of the push-pull ring 17 is provided with a groove. The end of the drive rod 11 is provided with a driven wheel 18. The driven wheel 18 is embedded in the groove and forms a rolling engagement with the groove. In this invention, the secondary track does not rotate actively. The shaft 4 supports the chain 5 with the help of the sprocket at its free end. At the same time, the chain 5 of the secondary track can rotate with the hinge engagement between the shaft 4 and the slide block 15. The main track sinks into the mud because the ground support is insufficient. Therefore, the secondary track widens the main track, increases the contact area between the tractor and the ground, and reduces the pressure. The shape of the push-pull ring 17 is consistent with the trajectory of the chain 5. When the folding mechanism rotates with the chain 5, its drive rod 11 rotates accordingly. The driven wheel 18 always forms a rolling connection between one end of the drive rod 11 and the push-pull ring 17. When the push-pull ring 17 moves, the drive rod 11 can move accordingly, ensuring the accuracy of the folding and unfolding of the secondary track.

[0030] like Figure 2-4As shown, when the track plate 6 of the secondary track 3 is in the unfolded state, the lower surface of the track plate 6 located below the secondary track 3 is higher than the lower surface of the main track 2. Since the main track 2 is usually stuck in muddy soil when the secondary track 3 is needed, the lower surface of the track plate 6 below the secondary track 3 is made higher than the lower surface of the main track 2 so that the secondary track is in contact with the soil surface, thereby supporting the main track while the secondary track can rotate as the vehicle moves forward.

[0031] Specific embodiment 2, such as Figure 6 As shown, the difference between specific embodiment 2 and specific embodiment 1 is only that specific embodiment 2 adds a limiting plate 19. The folding structure also includes a limiting plate 19 perpendicular to the track plate 6. One end of the limiting plate 19 is fixedly connected to the end of the track plate 6, and the other end of the limiting plate 19 faces the fixed plate 9. The limiting plate 19 is provided with a limiting groove 20 for the drive rod 11 to pass through. Limiting holes 21 are provided on both sides of the limiting groove 20. The drive rod 11 is provided with a fork-shaped limiting fork 22. The limiting fork 22 forms an insertion limiting and withdrawal cooperation with the limiting holes 21 by means of the extension and retraction of the drive rod 11. In this invention, a limiting plate 19 is provided, and the limiting plate 19 is provided with... A limiting groove 20 is provided for the drive rod 11 to pass through. The length of the limiting groove 20 allows the limiting plate 19 to rise together with the track plate 6 without obstructing the drive rod 11. At the same time, limiting holes 21 are provided on both sides of the limiting groove 20. The diameter of the limiting holes 21 is larger than the diameter of the fork of the limiting fork 22 to avoid interference when the fork moves forward and the limiting holes 21 move upward with the track plate 6. When the track plate 6 is in the unfolded state, the limiting fork 22 is inserted into the limiting hole 21. When the track plate 6 is bent due to pressure, the limiting fork 22 limits the limiting plate 19 with the limiting hole 21, thereby supporting the side of the track plate 6 away from the folding rod and preventing the lifting mechanism from falling back.

Claims

1. A tracked tractor with adjustable width and variable amplitude, comprising a tractor body (1) and a drive unit and a transmission unit disposed on the body (1), wherein the transmission unit comprises a main track (2) and a fixed wheel, a tension wheel and a ground wheel that are covered in and cooperate with the main track (2), the fixed wheel being located on the upper side of the front end of the main track (2) and connected to the power output end of the drive unit, characterized in that, The transmission unit also includes a secondary track (3) located at the gap of the main track (2) and a telescopic mechanism that drives the secondary track (3) to move horizontally. The fixed end of the telescopic mechanism is fixedly connected to the machine body (1), and the telescopic end of the telescopic mechanism is hinged to the rotating shaft (4) of the secondary track (3). The secondary track (3) reciprocates and extends in the horizontal direction perpendicular to the direction of movement of the tractor by means of the telescopic mechanism. Multiple track plates (6) are provided on the circumferential surface of the chain (5) of the secondary track (3) by means of the folding mechanism. The track plates (6) reciprocate and extend perpendicular to the surface of the secondary track (3) by means of the folding mechanism.

2. The tracked traction machine with adjustable width and variable amplitude according to claim 1, characterized in that, The folding mechanism includes a lifting unit located between the chain (5) and the track plate (6) of the secondary track (3) and a power unit for driving the lifting unit to lift. The lifting unit includes a first folding rod (7) and a second folding rod (8) that are hinged to each other in an X-shape. The lifting unit also includes a fixed plate (9) and two sets of symmetrical sliding grooves (10). The fixed plate (9) is fixedly connected to the chain (5), one set of sliding grooves (10) is fixedly connected to the track plate (6), and the other set of sliding grooves (10) is fixedly connected to the fixed plate (9). The first folding rod (7) One end of the first folding rod (7) is hinged to the track plate (6), and the other end of the second folding rod (8) is hinged to the moving end of the power unit and matches the slide groove (10) located on one side of the fixed plate (9). One end of the second folding rod (8) is hinged to the fixed plate (9), and the other end of the second folding rod (8) matches the slide groove (10) located on one side of the track plate (6) and has the freedom to move along the slide groove (10). The first folding rod (7) has the freedom to move along the slide groove (10) with the help of the power unit. The lifting unit retracts or unfolds the track plate (6) with the help of the power unit.

3. The tracked traction machine with adjustable width and variable amplitude according to claim 2, characterized in that, The power unit includes a drive rod (11), a push-pull frame (12), and a drive telescopic cylinder (13). The fixed end of the drive telescopic cylinder (13) is fixedly connected to the telescopic mechanism, and the moving end of the drive telescopic cylinder (13) is fixedly connected to the push-pull frame (12). One end of the drive rod (11) is hinged to one end of the first folding rod (7) located in the slide groove (10), and the other end of the drive rod (11) is rotatably connected to the push-pull frame (12). The drive rod (11) moves with the help of the drive telescopic cylinder (13) and drives the lifting unit to form a lifting and lowering mechanism.

4. The tracked traction machine with adjustable width and variable amplitude according to claim 3, characterized in that, The telescopic mechanism includes a slide rail (14), a slide block (15), and a sliding telescopic cylinder (16). The slide rail (14) is fixedly connected to the machine body (1). The track direction of the slide rail (14) is perpendicular to the moving direction of the traction machine and parallel to the horizontal plane. The fixed end of the sliding telescopic cylinder (16) is fixedly connected to the machine body (1). The telescopic end of the sliding telescopic cylinder (16) is fixedly connected to one end of the slide block (15). The other end of the slide block (15) is fixedly connected to the rotating shaft (4) of the auxiliary track (3). The slide block (15) drives the auxiliary track (3) to reciprocate in the horizontal direction by means of the sliding telescopic cylinder (16).

5. A tracked traction machine with adjustable width and variable amplitude according to claim 4, characterized in that, The push-pull frame (12) is a ring-shaped mechanism. The center of the push-pull frame (12) is provided with a through hole for the rotating shaft (4) to pass through. Multiple drive telescopic cylinders (13) are provided on both sides of the slide (15). The fixed end of the drive telescopic cylinder (13) is fixedly connected to the slide (15). The push-pull frame (12) moves repeatedly along the rotating shaft (4) with the help of the drive telescopic cylinders (13).

6. A tracked traction machine with adjustable width and variable amplitude according to claim 3, characterized in that, The push-pull frame (12) is provided with a ring-shaped push-pull ring (17), and the inner side of the push-pull ring (17) is provided with a groove. The end of the drive rod (11) is provided with a driven wheel (18), which is embedded in the groove and forms a rolling fit with the groove.

7. A tracked traction machine with adjustable width and variable amplitude according to claim 3, characterized in that, The folding mechanism also includes a limiting plate (19) perpendicular to the track plate (6). One end of the limiting plate (19) is fixedly connected to the end of the track plate (6), and the other end of the limiting plate (19) faces the fixed plate (9). The limiting plate (19) is provided with a limiting groove (20) for the drive rod (11) to pass through. Limiting holes (21) are provided on both sides of the limiting groove (20). The drive rod (11) is provided with a fork-shaped limiting fork (22). The limiting fork (22) forms an insertion limiting and withdrawal cooperation with the limiting hole (21) by means of the extension and retraction of the drive rod (11).

8. A tracked traction machine with adjustable width and variable amplitude according to claim 1, characterized in that, When the track plate (6) of the secondary track (3) is in the unfolded state, the lower surface of the track plate (6) located below the secondary track (3) is higher than the lower surface of the main track (2).

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