Tractor convenient to turn for agricultural machinery

Abstract

The utility model discloses an agricultural machine tractor convenient to turn. The agricultural machine tractor comprises a driving assembly. Two ends of the first rotating shaft are connected with second rotating shafts; supporting rods are mounted on the two sides of the first rotating shaft; mounting plates are mounted at the two ends of the supporting rod; fourth rotating shafts are rotationally mounted on the two mounting plates, and traveling wheels are mounted on the fourth rotating shafts; steering mechanisms are mounted at one ends of the two second rotating shafts; the steering mechanism comprises a third rotating shaft rotationally mounted on the mounting plate; a second turntable is slidably mounted on the third rotating shaft; one end of the second rotating shaft is connected with a first turntable; a plurality of convex columns are fixedly connected to one of the contact surfaces of the second turntable and the first turntable, and limiting holes matched with the convex columns are formed in the other contact surface of the second turntable and the first turntable; first gears are mounted at the ends, extending out of the mounting plates, of the third rotating shafts; and a transmission assembly for connecting the first gear and the fourth rotating shaft is mounted on the mounting plate. The utility model has the advantages of simple structure, low cost, light weight and suitability for small agricultural machinery.

Description

Technical Field

[0001] This utility model relates to the field of traction machine technology, and in particular to a traction machine for agricultural machinery that is easy to turn. Background Technology

[0002] Agricultural machinery such as transplanter punches and rotary tillers mostly require a tractor to drive the working parts. To enable the machine to turn, some agricultural machinery uses a single-sided drive tractor with the other side as a driven wheel, resulting in uneven power output and requiring improvement in traction and stability. While some large agricultural machinery uses tractors with steering mechanisms, their complex structure, high cost, and heavy weight make them unsuitable for smaller machines. Therefore, it is essential to develop a simple, low-cost, lightweight, and easily maneuverable tractor for agricultural machinery. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide an agricultural machinery tractor that is simple in structure, low in cost, lightweight and easy to turn.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is an agricultural machinery traction machine that is easy to turn, including a drive assembly; the drive assembly includes a first rotating shaft rotatably mounted on its reduction gearbox; both ends of the first rotating shaft are connected to second rotating shafts; support rods are installed on both sides of the first rotating shaft; mounting plates are installed on both ends of the support rods; a fourth rotating shaft is rotatably mounted on the two mounting plates, and a traveling wheel is mounted on the fourth rotating shaft; a steering mechanism is installed at one end of each of the two second rotating shafts; the steering mechanism includes a third rotating shaft rotatably mounted on the mounting plate; a second turntable is slidably mounted on the third rotating shaft; one end of the second rotating shaft is connected to the first turntable; at the contact surface between the second turntable and the first turntable, one of them is fixedly connected with several protrusions, and the other has a limiting hole that cooperates with the protrusions; the surface of the third rotating shaft is provided with a groove, and the inner hole of the second turntable is connected to a slider that cooperates with the groove; a first gear is installed at the end of the third rotating shaft that extends out of the mounting plate; a transmission assembly for connecting the first gear and the fourth rotating shaft is installed on the mounting plate.

[0005] Furthermore, the transmission assembly includes a second gear that meshes with the first gear and is rotatably mounted on the mounting plate; a first sprocket is mounted on the other end of the shaft on which the second gear is mounted; a second sprocket is mounted on the other end of the fourth shaft; and the first sprocket and the second sprocket are connected by a chain.

[0006] Furthermore, several reinforcing plates are fixed between the two support rods.

[0007] Furthermore, a third support plate is installed between the support rods; a third bushing is rotatably mounted on the third support plate via a first bearing seat; one end of the second rotating shaft is detachably connected to the third bushing; and the first turntable is fixedly connected to the third bushing.

[0008] Furthermore, a second support plate is fixedly connected to each of the support rods on both sides; the third support plate is detachably installed between the two second support plates.

[0009] Furthermore, a second bushing is detachably mounted on the second shaft; a drive sprocket is mounted on the second bushing.

[0010] Furthermore, two sets of first support plates are fixedly connected to the support rod; a support frame is fixedly connected between each set of first support plates; and a third bearing seat for rotatably mounting the first rotating shaft is installed on the support frame.

[0011] Furthermore, a slip ring is fixedly connected to the side of the second turntable away from the first turntable; flanges are connected to both ends of the slip ring; a steering rod is snapped onto the outside of the slip ring;

[0012] The mounting plate has a stepped hole through which the third rotating shaft passes; one end of the spring is installed in the stepped hole and contacts the step of the stepped hole, and the other end contacts the slip ring; the steering rod includes a pawl for moving the slip ring and a lever connected to the pawl; the lever is hinged to a wing plate fixed to the support rod.

[0013] Furthermore, one end of the lever is connected to a limiting rod; a limiting plate is fixedly attached to the support rod; a first limiting groove and a second limiting groove are provided on the limiting plate; the length of the first limiting groove is longer than the length of the second limiting groove, and one end of the two is connected; the limiting rod passes through the limiting plate; when the first turntable and the second turntable are in contact, the limiting rod is located at the end of the first limiting groove that extends beyond the second limiting groove; when the first turntable and the second turntable are separated, and the protrusion disengages from the surface of the second turntable, the steering rod is located at one end of the second limiting groove.

[0014] Furthermore, a first bushing is detachably connected between the second rotating shaft and the first rotating shaft; a second bushing is detachably installed on the first bushing; and a drive sprocket is installed on the second bushing.

[0015] The beneficial effects of this utility model are:

[0016] During normal operation, the power of the drive assembly is transmitted from the first rotating shaft to the second rotating shaft. The second rotating shaft drives the first turntable to rotate. Under the action of the protrusion and the limiting hole, the first turntable drives the second turntable to rotate. Under the action of the slider and the groove, the second turntable drives the third rotating shaft to rotate. The third rotating shaft drives the first gear to rotate. The first gear drives the fourth rotating shaft to rotate through the transmission assembly, thereby driving the traveling wheels to rotate. When a turn is required, the second turntable on the inner side of the turning mechanism moves away from the first turntable, causing the protrusion to disengage from the limiting hole. At this time, the rotation of the second rotating shaft and the first turntable on this side will not drive the second turntable to rotate. The traveling wheels on this side lose power drive and switch to driven wheels, thus completing the turning action. This utility model has a simple structure, low cost, light weight, and is suitable for small agricultural machinery. Attached Figure Description

[0017] Figure 1 This is a partial top view of the structure of Example 1;

[0018] Figure 2 for Figure 1 Enlarged view of the structure at point A in the middle;

[0019] Figure 3 This is a schematic diagram of the internal structure of the reinforcing plate in Example 1;

[0020] Figure 4 This is an assembly drawing of a partial structure of Example 1;

[0021] Figure 5 This is a schematic diagram of a partial structure in Example 1;

[0022] Figure 6 This is a side view of the overall structure of Example 2;

[0023] Figure 7 This is a top view of part of the structure in Example 2;

[0024] Figure 8 This is a side view of the limiting plate in Example 2;

[0025] Figure 9 This is a schematic diagram of a local structure in Example 2 in normal driving state (top) and steering state (bottom).

[0026] In the diagram, 1-drive assembly, 2-walking wheel, 3-first shaft, 4-first bushing, 5-support rod, 6-reinforcing plate, 7-first support plate, 8-support frame, 9-second bushing, 10-drive sprocket, 11-third bushing, 12-second support plate, 13-third support plate, 14-second shaft, 15-groove, 16-first bearing seat, 17-first turntable, 18-second turntable, 19-protruding column, 20- - Third rotating shaft, 21- Second bearing seat, 22- Spring, 23- Slip ring, 24- Lever, 2401- Lever ring, 2402- Lever, 2403- Limiting rod, 25- First gear, 26- Mounting plate, 27- Second gear, 28- First sprocket, 29- Second sprocket, 30- Fourth rotating shaft, 31- Limiting plate, 32- First limiting groove, 33- Second limiting groove, 34- Third bearing seat, 35- Wing plate. Detailed Implementation

[0027] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0028] Example 1

[0029] A type of agricultural tractor that is easy to turn, such as Figure 1-5 As shown, the system includes a drive assembly 1; the drive assembly 1 includes a first rotating shaft 3 rotatably mounted on its gearbox; both ends of the first rotating shaft 3 are connected to second rotating shafts 14; support rods 5 are mounted on both sides of the first rotating shaft 3; mounting plates 26 are mounted on both ends of the support rods 5; a fourth rotating shaft 30 is rotatably mounted on the two mounting plates 26, and a traveling wheel 2 is mounted on the fourth rotating shaft 30; a steering mechanism is mounted on one end of each of the two second rotating shafts 14; the steering mechanism includes a third rotating shaft 20 rotatably mounted on the mounting plate 26; and a second shaft for rotatably mounting the third rotating shaft 20 is mounted on the mounting plate 26. A bearing 21 is provided; a second turntable 18 is slidably mounted on the third rotating shaft 20; one end of the second rotating shaft 14 is connected to the first turntable 17; at the contact surface between the second turntable 18 and the first turntable 17, one of them is fixedly connected with several protrusions 19, and the other has a limiting hole that mates with the protrusions 19; a groove 15 is provided on the surface of the third rotating shaft 20, and a slider that mates with the groove 15 is connected to the inner hole of the second turntable 18; a first gear 25 is mounted on one end of the third rotating shaft 20 extending out of the mounting plate 26; a transmission assembly for connecting the first gear 25 and the fourth rotating shaft 30 is mounted on the mounting plate 26. The first rotating shaft 3 is a component integrated into the drive assembly 1.

[0030] In this embodiment, the drive component 1 is existing technology, including components such as a gasoline or diesel engine and a reduction gearbox, which can output the rotational motion of the first rotating shaft 3. It can be the drive part of a commonly available micro-tiller. In this embodiment, the drive component 1 was purchased from Chongqing Yaohu Power Machinery Co., Ltd.

[0031] The aforementioned agricultural tractor for easy turning operates as follows: During normal operation, the power of the drive assembly 1 is transmitted from the first rotating shaft 3 to the second rotating shaft 14. The second rotating shaft 14 drives the first turntable 17 to rotate. Under the action of the protrusion 19 and the limiting hole, the first turntable 17 drives the second turntable 18 to rotate. Under the action of the slider and the groove 15, the second turntable 18 drives the third rotating shaft 20 to rotate. The third rotating shaft 20 drives the first gear 25 to rotate. The first gear 25 drives the fourth rotating shaft 30 to rotate through the transmission assembly, thereby driving the traveling wheel 2 to rotate. When turning is required, the second turntable 18 on the inner side of the turning mechanism moves away from the first turntable 17, causing the protrusion 19 to disengage from the limiting hole. At this time, the rotation of the second rotating shaft 14 and the first turntable 17 on this side will not drive the second turntable 18 to rotate. The traveling wheel 2 on this side loses power drive and switches to a driven wheel, thus completing the turning action. This utility model has a simple structure, low cost, light weight, and is suitable for small agricultural machinery.

[0032] Specifically, the transmission assembly includes a second gear 27 rotatably mounted on the mounting plate 26 and meshing with the first gear 25; a first sprocket 28 is mounted on the other end of the shaft on which the second gear 27 is mounted; a second sprocket 29 is mounted on the other end of the fourth shaft 30; the first sprocket 28 and the second sprocket 29 are connected by a chain. The first gear 25 drives the second gear 27 to rotate, thereby driving the first sprocket 28 to rotate, and the first sprocket 28 drives the second sprocket 29 to rotate via the chain, thereby driving the fourth shaft 30 and the traveling wheel 2 to rotate.

[0033] Specifically, in order to improve the connection strength of the traction machine, several reinforcing plates 6 are fixed between the two support rods 5.

[0034] Specifically, a third support plate 13 is installed between the support rods 5; a third bushing 11 is rotatably mounted on the third support plate 13 via a first bearing seat 16; one end of the second rotating shaft 14 is detachably connected to the third bushing 11; and the first turntable 17 is fixedly connected to the third bushing 11. When the second rotating shaft 14 rotates, it can drive the third bushing 11 to rotate, thereby driving the first turntable 17 to rotate.

[0035] Specifically, for ease of adjustment, a second support plate 12 is fixedly connected to the support rods 5 on both sides; the third support plate 13 can be detachably installed between the two second support plates 12.

[0036] Specifically, a second bushing 9 is detachably mounted on the second shaft 14; a drive sprocket 10 is mounted on the second bushing 9. Rotation of the first shaft 3 can drive the drive sprocket 10 to rotate. After the working component is installed, a sprocket is installed on the shaft that needs to rotate on the working component, and a chain is used to connect the drive sprocket 10 to the sprocket on the working component, so that the power of the traction machine can be transmitted to the working component.

[0037] Specifically, two sets of first support plates 7 are fixedly connected to the support rod 5; a support frame 8 is fixedly connected between each set of first support plates 7; a third bearing seat 34 for rotatably mounting the first rotating shaft 3 is installed on the support frame 8. The weight of the drive assembly 1 acts on the third bearing seat 34 through the first rotating shaft 3, and thus acts on the support rod 5.

[0038] Specifically, a slip ring 23 is fixedly connected to the side of the second turntable 18 away from the first turntable 17; flanges are connected to both ends of the slip ring 23; a steering rod 24 is snapped onto the outside of the slip ring 23. A stepped hole is provided on the mounting plate 26 for the third rotating shaft 20 to pass through; one end of the spring 22 is installed in the stepped hole and contacts the step of the stepped hole, and the other end contacts the slip ring 23; the steering rod 24 includes a deflector ring 2401 for moving the slip ring 23 and a deflector rod 2402 connected to the deflector ring 2401; the deflector rod 2402 is hinged to the wing plate 35 fixed to the support rod 5. By rotating one end of the steering lever 24, the slip ring 23 can be pushed to move the first turntable 17, compressing the spring 22. When it moves to a certain extent, the protrusion 19 disengages from the limiting hole, stopping the rotation of the steering lever 24 and maintaining the gripped state. At this time, the rotation of the second shaft 14 and the first turntable 17 on this side will not drive the second turntable 18 to rotate, and the traveling wheel 2 on this side loses power drive and switches to a driven wheel, thus completing the turning action. After the turn is completed, the steering lever 24 is released, and the spring 22 pushes the slip ring 23 and the first turntable 17 to move in the opposite direction. When the protrusion 19 is aligned with the limiting hole, the protrusion 19 enters the limiting hole, and the first turntable 17 and the second turntable 18 resume engagement, thus continuing normal travel.

[0039] Specifically, a protective cover is installed on the inner side of the mounting plate 26, covering the outside of the first sprocket 28 and the second sprocket 29. The protective cover is not shown in the figure.

[0040] In this embodiment, the two first support plates 7 located on one side are provided with connection holes for connecting external working parts. In another embodiment, a connecting plate is installed on the support rod 5, and connection holes for connecting external working parts are provided on the connecting plate.

[0041] Example 2

[0042] A type of agricultural tractor that is easy to turn, such as Figure 6-9 As shown, compared to Embodiment 1, a first bushing 4 and a limiting plate 31 are added.

[0043] Specifically, one end of the lever 2402 is connected to a limiting rod 2403; a limiting plate 31 is fixed to the support rod 5; the limiting plate 31 has a first limiting groove 32 and a second limiting groove 33; the length of the first limiting groove 32 is longer than the length of the second limiting groove 33, and one end of the two is connected; the limiting rod 2403 passes through the limiting plate 31; when the first turntable 17 and the second turntable 18 are in contact, the limiting rod 2403 is located at the end of the first limiting groove 32 that extends beyond the second limiting groove 33; when the first turntable 17 and the second turntable 18 are separated, and the protrusion 19 is no longer in contact with the surface of the second turntable 18, the steering rod 24 is located at one end of the second limiting groove 33. Compared to embodiment 1, a limiting plate 31 has been added. When switching from normal driving to turning, hold one end of the limiting rod 2403 and push it to slide from the upper first limiting groove 32 to the lower second limiting groove 33. This is equivalent to one end of the limiting rod 2403 moving towards the center of the tractor, thereby causing the other end (the end with the derailleur 2401) to move away from the center of the tractor. The second limiting groove 33 then restricts one end of the limiting rod 2403, preventing it from rotating under the action of the spring 22. Therefore, in Embodiment 2, by setting the limiting plate 31, the driver does not need to continuously hold the steering rod 24 during turning.

[0044] Specifically, a first bushing 4 is detachably connected between the second rotating shaft 14 and the first rotating shaft 3; a second bushing 9 is detachably mounted on the first bushing 4; and a drive sprocket 10 is mounted on the second bushing 9. The purpose of adding the first bushing 4 is to facilitate the disassembly and assembly of the second bushing 9 and the drive sprocket 10, and to facilitate maintenance.

[0045] In the above embodiments, the cross-sections of the first rotating shaft 3, the second rotating shaft 14, and the first bushing 4, as well as the inner holes of the second bushing 9 and the third bushing 11, can be circular or polygonal. When they are polygonal, the inner ring of the bearing that mates with them is also polygonal.

[0046] The working principle of this utility model:

[0047] During normal operation, the power of drive assembly 1 is transmitted from the first rotating shaft 3 to the second rotating shaft 14. The second rotating shaft 14 drives the first turntable 17 to rotate. Under the action of the protrusion 19 and the limiting hole, the first turntable 17 drives the second turntable 18 to rotate. Under the action of the slider and the groove 15, the second turntable 18 drives the third rotating shaft 20 to rotate. The third rotating shaft 20 drives the first gear 25 to rotate. The first gear 25 drives the fourth rotating shaft 30 to rotate through the transmission assembly, thereby driving the traveling wheel 2 to rotate. When turning is required, rotating one end of the steering rod 24 can push the slip ring 23 to move the first turntable 17, compressing the spring 22. When it moves to a certain extent, the protrusion 19 disengages from the limiting hole. At this time, the rotation of the second rotating shaft 14 and the first turntable 17 on this side will not drive the second turntable 18 to rotate. The traveling wheel 2 on this side loses power drive and switches to a driven wheel, thus completing the turning action. After the turn, release the steering lever 24, or push one end of the limiting lever 2403 into the upper first limiting groove 32. The spring 22 pushes the slip ring 23 and the first turntable 17 to move in the opposite direction. When the protrusion 19 is aligned with the limiting hole, the protrusion 19 enters the limiting hole, and the first turntable 17 and the second turntable 18 resume their engagement, thus continuing normal movement. This utility model has a simple structure, low cost, and light weight, making it suitable for small agricultural machinery.

[0048] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. A tractor for agricultural machines for facilitating turning, comprising a drive assembly (1); characterized in that: The drive assembly (1) includes a first shaft (3) rotatably mounted on its gearbox; both ends of the first shaft (3) are connected to second shafts (14); support rods (5) are mounted on both sides of the first shaft (3); mounting plates (26) are mounted on both ends of the support rods (5); a fourth shaft (30) is rotatably mounted on the two mounting plates (26), and a traveling wheel (2) is mounted on the fourth shaft (30); a steering mechanism is mounted on one end of each of the two second shafts (14); the steering mechanism includes a third shaft (20) rotatably mounted on the mounting plate (26); and a sliding shaft (2) is mounted on the third shaft (20). The first turntable (17) is connected to one end of the second rotating shaft (14); at the contact surface of the second turntable (18) and the first turntable (17), one of them is fixed with several protrusions (19), and the other is provided with a limiting hole that cooperates with the protrusions (19); the surface of the third rotating shaft (20) is provided with a groove (15), and the inner hole of the second turntable (18) is connected with a slider that cooperates with the groove (15); the first gear (25) is installed at one end of the third rotating shaft (20) that extends out of the mounting plate (26); a transmission assembly for connecting the first gear (25) and the fourth rotating shaft (30) is installed on the mounting plate (26).

2. The agricultural tractor for easy turning as described in claim 1, characterized in that: The transmission assembly includes a second gear (27) that meshes with the first gear (25) and is rotatably mounted on the mounting plate (26); a first sprocket (28) is mounted on the other end of the shaft on which the second gear (27) is mounted; a second sprocket (29) is mounted on the other end of the fourth shaft (30); the first sprocket (28) and the second sprocket (29) are connected by a chain.

3. The agricultural tractor for easy turning as described in claim 1, characterized in that: Several reinforcing plates (6) are fixed between the two support rods (5).

4. The agricultural tractor for easy turning as described in claim 1, characterized in that: A third support plate (13) is installed between the support rods (5); a third bushing (11) is rotatably installed on the third support plate (13) via a first bearing seat (16); one end of the second rotating shaft (14) is detachably connected to the third bushing (11); the first turntable (17) is fixedly connected to the third bushing (11).

5. The agricultural machinery tractor for easy turning as described in claim 4, characterized in that: A second support plate (12) is fixedly connected to each of the support rods (5) on both sides; the third support plate (13) is detachably installed between the two second support plates (12).

6. The agricultural tractor for easy turning as described in claim 1, characterized in that: A second bushing (9) is detachably mounted on the second shaft (14); a drive sprocket (10) is mounted on the second bushing (9).

7. The agricultural tractor for easy turning as described in claim 1, characterized in that: Two sets of first support plates (7) are fixedly connected to the support rod (5); a support frame (8) is fixedly connected between each set of first support plates (7); a third bearing seat (34) for rotatably mounting the first rotating shaft (3) is installed on the support frame (8).

8. The agricultural tractor for easy turning as described in claim 1, characterized in that: The second turntable (18) is fixedly connected to a slip ring (23) on the side away from the first turntable (17); flanges are connected to both ends of the slip ring (23); a steering rod (24) is snapped onto the outside of the slip ring (23). The mounting plate (26) has a stepped hole through which the third rotating shaft (20) passes; one end of the spring (22) is installed in the stepped hole and contacts the step of the stepped hole, and the other end contacts the slip ring (23); the steering rod (24) includes a swivel ring (2401) for moving the slip ring (23) and a lever (2402) connected to the swivel ring (2401); the lever (2402) is hinged to the wing plate (35) fixed on the support rod (5).

9. The agricultural tractor for easy turning as described in claim 8, characterized in that: One end of the lever (2402) is connected to a limiting rod (2403); a limiting plate (31) is fixedly connected to the support rod (5); a first limiting groove (32) and a second limiting groove (33) are provided on the limiting plate (31); the length of the first limiting groove (32) is longer than the length of the second limiting groove (33), and one end of the two is connected; the limiting rod (2403) passes through the limiting plate (31); when the first turntable (17) and the second turntable (18) are in contact, the limiting rod (2403) is located at the end of the first limiting groove (32) that extends beyond the second limiting groove (33); when the first turntable (17) and the second turntable (18) are separated, and the protrusion (19) is no longer in contact with the surface of the second turntable (18), the steering rod (24) is located at one end of the second limiting groove (33).

10. The agricultural tractor for easy turning as described in claim 1, characterized in that: A first bushing (4) is detachably connected between the second rotating shaft (14) and the first rotating shaft (3); a second bushing (9) is detachably installed on the first bushing (4); and a drive sprocket (10) is installed on the second bushing (9).

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