Rear suspension assembly

Abstract

The utility model discloses a rear suspension assembly and belongs to the technical field of snowfield motorcycle accessories. Comprising a main body and a shock absorber installed on the main body, and further comprises a tensioning wheel swing arm, a tensioning wheel and an elastic element which are arranged on the main body, one end of the tensioning wheel swing arm is rotatably connected with the main body, the other end of the tensioning wheel swing arm is a free end, and the tensioning wheel is rotatably installed at the free end of the tensioning wheel swing arm; the elastic element is arranged between the tensioning wheel swing arm and the main body, and the elastic element is in a compressed state and pushes the free end of the tensioning wheel swing arm to move upwards. The elastic element of the rear suspension assembly pushes the free end of the tensioning wheel swing arm to move upwards, then the tensioning wheel tensions the track, due to the fact that the elastic element is in the compressed state, force enabling the free end of the tensioning wheel swing arm to move upwards can be provided at any time, and the tensioning wheel always compresses the track through the elastic force of the elastic element. Furthermore, the tensioning speed is stable, and the automatic tensioning device is more convenient to use.

Description

Technical Field

[0001] The utility model relates to a rear suspension assembly, belonging to the technical field of snowmobile accessories. Background Art

[0002] Snowmobiles can travel on snow and do not require specific roads. The power source of snowmobiles is an internal combustion engine, which drives the tracks through the gearbox and then drives the snowmobile. This type of vehicle is widely used in winter sports, snow rescue, forestry and snow patrol.

[0003] The rear track of the snowmobile is installed on the rear suspension assembly, and a shock absorber is arranged between the rear suspension and the snowmobile to improve the riding comfort. The track of the snowmobile needs to be kept in a tensioned state to ensure the stability of the snowmobile and avoid the problem of slipping. The track of the existing snowmobile needs to be adjusted manually to achieve the tension of the track, that is, the screw is manually turned to tension the track through the tensioning wheel, but with the use of the snowmobile, the track will inevitably become loose, which requires the track tightness to be checked and adjusted before driving, which is very inconvenient to use. Summary of the invention

[0004] The technical problem to be solved by the utility model is: to overcome the deficiencies of the prior art and to provide a rear suspension assembly which can movably adjust the tension of the crawler track and ensure that the tension of the crawler track remains stable.

[0005] The technical solution adopted by the utility model to solve its technical problems is: the rear suspension assembly includes a main body and a shock absorber installed on the main body, and also includes a tension wheel swing arm, a tension wheel and an elastic element arranged on the main body, one end of the tension wheel swing arm is rotatably connected to the main body, and the other end is a free end, the tension wheel is rotatably installed on the free end of the tension wheel swing arm, the elastic element is arranged between the tension wheel swing arm and the main body, the elastic element is in a compressed state and pushes the free end of the tension wheel swing arm to move upward.

[0006] Preferably, the tension wheel swing arms have two symmetrically arranged on both sides of the main body, each tension wheel swing arm is mounted with a tension wheel, and an elastic element is arranged between each tension wheel swing arm and the main body.

[0007] Preferably, it also includes an installation shaft and a tensioning shaft, the installation shaft is rotatably mounted on the main body, the two tensioning wheel swing arms are rotatably connected to one end corresponding to the installation shaft, the two ends of the tensioning shaft are rotatably connected to the free ends of the two tensioning wheel swing arms, and the tensioning wheel is rotatably mounted on the tensioning shaft.

[0008] Preferably, it also includes a guide shaft, the upper end of the guide shaft is rotatably connected to the tensioning wheel swing arm, and the lower end is slidably connected to the main body.

[0009] Preferably, a limit block is installed on the main body, and the limit block is located directly below the tensioning wheel swing arm.

[0010] Preferably, it also includes a hardness and softness adjustment device, the shock absorber includes a front shock absorber and a rear shock absorber, the front and rear ends of the main body are respectively provided with a front torque arm assembly and a rear torque arm assembly, the front shock absorber is arranged between the front torque arm assembly and the main body, the rear shock absorber is arranged between the rear torque arm assembly and the main body, and the hardness and softness adjustment device is arranged between the front torque arm assembly and the rear torque arm assembly.

[0011] Preferably, the softness and hardness adjustment device includes an adjustment rod and a spacing adjustment assembly, one end of the adjustment rod is rotatably connected to the front torque arm assembly, and the other end is rotatably connected to the rear torque arm assembly through the spacing adjustment assembly.

[0012] Preferably, the spacing adjustment assembly includes an adjusting screw and an adjusting arm, one end of the adjusting arm is rotatably connected to the adjusting pull rod, and the other end is rotatably connected to the rear torque arm assembly, the adjusting screw is rotatably mounted on the rear torque arm assembly, the adjusting screw is threadably connected to the adjusting arm, and enables the adjusting arm to rotate relative to the rear torque arm assembly.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The elastic element of the rear suspension assembly pushes the free end of the tension wheel swing arm to move upward, thereby causing the tension wheel to tension the track. Since the elastic element is in a compressed state, it can always provide a force to cause the free end of the tension wheel swing arm to move upward. The elastic force of the elastic element causes the tension wheel to always press the track tightly, thereby ensuring that the track is automatically tensioned, and the tensioning degree is stable, making it more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a three-dimensional schematic diagram of a rear suspension assembly;

[0016] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0017] Figure 3 is a top view schematic diagram of the rear suspension assembly;

[0018] Figure 4 is a front cross-sectional schematic diagram of a rear suspension assembly;

[0019] Figure 5 for Figure 4 A partial enlarged view of point B in the middle.

[0020] In the figure: 1. main body; 2. tension wheel swing arm; 3. tensioning shaft; 4. outer tension wheel; 5. inner tension wheel; 6. tensioning spring; 7. outer road wheel; 8. inner road wheel; 9. rear torque arm assembly; 10. rear cradle lower swing arm; 11. rear cradle; 12. mounting shaft; 13. rear shock absorber; 14. adjusting rod; 15. front torque arm assembly; 16. front cradle; 17. front support shaft; 18. front support wheel; 19. limiting pull belt; 20. support shaft; 21. limiting block; 22. baffle; 23. scimitar rocker arm; 24. guide shaft; 25. adjusting arm; 26. limiting shaft; 27. connecting piece; 28. adjusting screw; 29. ​​front shock absorber. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with specific embodiments. However, people familiar with the art should understand that the detailed description given here in conjunction with the drawings is for better explanation, and the structure of the present invention necessarily exceeds these limited embodiments. For some equivalent replacement schemes or common means, they are no longer described in detail herein, but still fall within the scope of protection of the present application.

[0022] Figures 1 to 5 It is the best embodiment of the utility model, and the following Figures 1 to 5 The utility model is further described.

[0023] The rear suspension assembly includes a main body 1 and a shock absorber mounted on the main body 1, and also includes a tension wheel swing arm 2, a tension wheel and an elastic element arranged on the main body 1. One end of the tension wheel swing arm 2 is rotatably connected to the main body 1, and the other end is a free end. The tension wheel is rotatably mounted on the free end of the tension wheel swing arm 2. The elastic element is arranged between the tension wheel swing arm 2 and the main body 1. The elastic element is in a compressed state and pushes the free end of the tension wheel swing arm 2 to move upward. The elastic element of the rear suspension assembly pushes the free end of the tension wheel swing arm 2 to move upward, thereby causing the tension wheel to tension the track. Since the elastic element is in a compressed state, it can always provide a force to move the free end of the tension wheel swing arm 2 upward. The elastic force of the elastic element causes the tension wheel to always press the track, thereby ensuring that the track is automatically tensioned, and the tensioning degree is stable, which is more convenient to use.

[0024] Specifically, Figure 1-5 As shown, in this embodiment, the front side of the main body 1 is the side facing the snowmobile, and the rear side is the side facing away from the snowmobile.

[0025] External road wheels 7 and internal road wheels 8 are installed on both sides of the main body 1. The external road wheels 7 and the internal road wheels 8 are arranged in pairs. Each pair of external road wheels 7 is arranged on both sides of the main body 1, and the external road wheels 7 are located on the outside of the main body 1. Each pair of internal road wheels 8 is also arranged on both sides of the main body 1, and the internal road wheels 8 are located on the inside of the main body 1. In this embodiment, there is only one pair of internal road wheels 8, and three pairs of external road wheels 7 are arranged side by side and at intervals along the main body 1. The external road wheels 7 and the internal road wheels 8 are used to support the bottom of the track and bear the weight of the snowmobile. The external road wheels 7 and the internal road wheels 8 are rotatably mounted on the main body 1 through the road wheel mounting seat.

[0026] A front support wheel 18 and a front support shaft 17 are installed on the front side of the main body 1. The front support shaft 17 is rotatably installed on the main body 1. Front support wheels 18 are rotatably installed at both ends of the front support shaft 17. The front support wheel 18 is set higher than the outer road wheel 7. The front support wheel 18 is mainly used to support the front side of the track to ensure that the track is taut.

[0027] Tension wheel swing arms 2 are installed on both sides of the rear of the main body 1, and a mounting shaft 12 is rotatably installed on the rear of the main body 1. One end of the two tension wheel swing arms 2 is rotatably connected to the corresponding end of the mounting shaft 12, and the free ends of the two tension wheel swing arms 2 are connected to the same tensioning shaft 3. The two ends of the tensioning shaft 3 are rotatably connected to the free ends of the tension wheel swing arms 2 on the corresponding sides, and tension wheels are installed on both ends of the tensioning shaft 3. The elastic element is arranged on the lower side of the tension wheel swing arm 2, the lower end of the elastic element is supported on the main body 1, and the upper end is supported on the tension wheel swing arm 2, and the free end of the tension wheel swing arm 2 is pushed to swing upward, thereby tensioning the track through the tension wheel.

[0028] In this embodiment, the tensioning wheel includes an outer tensioning wheel 4 and an inner tensioning wheel 5, and both the outer tensioning wheel 4 and the inner tensioning wheel 5 are rotatably installed on the tensioning shaft 3, wherein the outer tensioning wheel 4 and the inner tensioning wheel 5 are respectively located on both sides of the tensioning wheel swing arm 2 on the corresponding side.

[0029] A guide shaft 24 is provided between each tensioning wheel swing arm 2 and the main body 1. The guide shaft 24 is provided at the lower side of the tensioning wheel swing arm 2. The upper end of the guide shaft 24 is rotatably connected to the tensioning wheel swing arm 2, and the other end is slidably connected to the main body 1 through the swing arm mounting seat, that is, the guide shaft 24 is slidably connected to the swing arm mounting seat, and the swing arm mounting seat is rotatably connected to the main body 1. In this embodiment, the elastic element is a tensioning spring 6, which is sleeved outside the guide shaft 24. The tensioning spring 6 is in a compressed state. One end of the tensioning spring 6 is supported on the swing arm mounting seat, and the other end is supported on the tensioning wheel swing arm 2 on the corresponding side, and pushes the free end of the tensioning wheel swing arm 2 to move upward. The lower end of the guide shaft 24 passes through the swing arm mounting seat and is threadedly connected to a limiting nut, which can prevent the guide shaft 24 from being separated from the main body 1.

[0030] A limit block 21 is installed at the rear of the main body 1. The limit block 21 corresponds to the tension wheel swing arm 2 one by one. The limit block 21 is arranged directly below the corresponding tension wheel swing arm 2. The limit block 21 is a rubber limit block.

[0031] A front cradle 16 , a front torque arm assembly 15 , a rear cradle 11 and a rear torque arm assembly 9 are sequentially mounted on the main body 1 from front to rear, and the shock absorber comprises a front shock absorber 29 and a rear shock absorber 13 .

[0032] The front shock absorber 29 is gradually inclined upward in the direction close to the front cradle 16. Both sides of the front torque arm assembly 15 are rotatably connected to the main body 1. The front torque arm assembly 15 is fixedly connected to the front cradle 16. Both ends of the front cradle 16 are provided with a connection portion connected to the snowmobile. One end of the front shock absorber 29 is rotatably connected to the main body 1, and the other end is rotatably connected to the front cradle 16.

[0033] Furthermore, a support shaft 20 is installed on the main body 1, and one end of the front shock absorber 29 away from the front cradle 16 is rotatably connected to the support shaft 20, and a limiting pull belt 19 is arranged between the front cradle 16 and the front support shaft 17, one end of the limiting pull belt 19 is rotatably connected to the front cradle 16, and the other end is rotatably connected to the front support shaft 17, so as to limit the front cradle 16.

[0034] A scimitar swing arm 23 is installed at the lower part of the front torque arm assembly 15 away from the front shock absorber 29. One end of the scimitar swing arm 23 is fixedly installed on the front torque arm assembly 15, and the other end is a free end. The scimitar swing arm 23 is gradually inclined downward in a direction away from the front torque arm assembly 15. In this embodiment, two scimitar swing arms 23 are arranged at intervals.

[0035] Both ends of the rear torque arm assembly 9 are connected to the main body 1 through the rear cradle lower swing arm 10, the rear torque arm assembly 9 is located on the upper side of the main body 1, both ends of the rear torque arm assembly 9 are rotatably connected to the upper end of the rear cradle lower swing arm 10 on the corresponding side, the lower end of the rear cradle lower swing arm 10 is rotatably connected to the corresponding side of the main body 1, a limit rod 26 is arranged between the two rear cradle lower swing arms 10, the limit rod 26 is located on the lower side of the rear torque arm assembly 9, and both ends of the limit rod 26 are rotatably connected to the middle part of the rear cradle lower swing arm 10 on the corresponding side.

[0036] The rear cradle 11 is disposed between the rear torque arm assembly 9 and the front torque arm assembly 15, and is higher than the rear torque arm assembly 9 and the intermediate torque arm assembly 15. The front side of the rear torque arm assembly 9 is fixedly connected to the rear cradle 11, and the rear shock absorber 13 is located between the rear cradle 11 and the scimitar swing arm 23, and the rear shock absorber 13 is gradually inclined downward in the direction close to the scimitar swing arm 23. The lower end of the rear shock absorber 13 extends between the two scimitar swing arms 23 and is hinged to the free ends of the two scimitar swing arms 23.

[0037] The hardness and softness adjusting device is arranged between the rear torque arm assembly 9 and the front torque arm assembly 15, and the hardness and softness adjusting device is used to adjust the hardness and softness of the rear shock absorber 13. When the load is heavy, the rear shock absorber 13 can be adjusted to be hard, and when the load is light, the rear shock absorber 13 can be adjusted to be soft.

[0038] A baffle 22 is installed at the rear of the rear torque arm assembly 9, and two baffles 22 are arranged side by side and at intervals, and the lower end of the baffle 22 is supported on the side of the limiting rod 26 away from the rear shock absorber 13. The baffle 22 cooperates with the limiting rod 26 to limit the rear shock absorber 13.

[0039] Upper support wheels are rotatably installed at both ends of the rear cradle 11, and the upper support wheels can support the top of the crawler track. Both ends of the rear cradle 11 are provided with a connecting portion for being connected to a snowmobile.

[0040] The soft and hard adjustment device includes an adjustment rod 14, an adjustment arm, a connecting piece 27 and an adjustment bolt 28. The adjustment arm 25 is arranged at the lower side of the rear cradle 11. The top of the adjustment arm 25 is supported at the bottom of the rear cradle 11 and can rotate relative to the rear cradle 11. One end of the adjustment rod 14 is rotatably connected to the free end of the scimitar rocker arm 23, the other end of the adjustment rod 14 is rotatably connected to one end of the adjustment arm 25, and the other end of the adjustment arm 25 is rotatably connected to the rear torque arm assembly 9. The bottom of the rear torque arm assembly 9 is fixedly installed with a connecting piece 27, and the adjustment screw 28 is rotatably installed at the lower part of the connecting piece 27, and the adjustment screw 28 is threadedly connected to the middle part of the connecting arm 25. Rotating the adjustment screw 28 can make the connecting arm 25 rotate relative to the rear torque arm assembly 9, thereby adjusting the distance between the adjustment rod 14 and the rear torque arm assembly 9 to adjust the soft and hard of the rear shock absorber 13.

[0041] In this embodiment, there are two adjusting rods 14 symmetrically arranged on both sides of the rear shock absorber 13 .

[0042] The above is only the preferred embodiment of the utility model, and does not limit the utility model in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the technical solution of the utility model still belongs to the protection scope of the technical solution of the utility model.

Claims

1. A rear suspension assembly, comprising a main body (1) and a shock absorber mounted on the main body (1), characterized in that: It also includes a tension wheel swing arm (2), a tension wheel and an elastic element arranged on the main body (1); one end of the tension wheel swing arm (2) is rotatably connected to the main body (1), and the other end is a free end; the tension wheel is rotatably mounted on the free end of the tension wheel swing arm (2); the elastic element is arranged between the tension wheel swing arm (2) and the main body (1); the elastic element is in a compressed state and pushes the free end of the tension wheel swing arm (2) to move upward.

2. The rear suspension assembly according to claim 1, characterized in that: The tension wheel swing arms (2) have two arms symmetrically arranged on both sides of the main body (1), each tension wheel swing arm (2) is equipped with a tension wheel, and an elastic element is arranged between each tension wheel swing arm (2) and the main body (1).

3. The rear suspension assembly according to claim 2, characterized in that: It also includes a mounting shaft (12) and a tensioning shaft (3); the mounting shaft (12) is rotatably mounted on the main body (1); two tensioning wheel swing arms (2) are rotatably connected to one end corresponding to the mounting shaft (12); two ends of the tensioning shaft (3) are rotatably connected to the free ends of the two tensioning wheel swing arms (2); and the tensioning wheel is rotatably mounted on the tensioning shaft (3).

4. The rear suspension assembly according to claim 1 or 2, characterized in that: It also includes a guide shaft (24), the upper end of which is rotatably connected to the tension wheel swing arm (2), and the lower end of which is slidably connected to the main body (1).

5. The rear suspension assembly according to claim 1 or 2, characterized in that: A limit block (21) is installed on the main body (1), and the limit block (21) is located directly below the tension wheel swing arm (2).

6. The rear suspension assembly according to claim 1, characterized in that: The invention also comprises a hardness and softness adjustment device. The shock absorber comprises a front shock absorber (29) and a rear shock absorber (13). A front torque arm assembly (15) and a rear torque arm assembly (9) are respectively arranged at the front and rear ends of the main body (1). The front shock absorber (29) is arranged between the front torque arm assembly (15) and the main body (1). The rear shock absorber (13) is arranged between the rear torque arm assembly (9) and the main body (1). The hardness and softness adjustment device is arranged between the front torque arm assembly (15) and the rear torque arm assembly (9).

7. The rear suspension assembly according to claim 6, characterized in that: The softness and hardness adjustment device comprises an adjustment rod (14) and a spacing adjustment assembly. One end of the adjustment rod (14) is rotatably connected to the front torque arm assembly (15), and the other end is rotatably connected to the rear torque arm assembly (9) via the spacing adjustment assembly.

8. The rear suspension assembly according to claim 7, characterized in that: The spacing adjustment assembly comprises an adjustment screw (28) and an adjustment arm (25), one end of the adjustment arm (25) is rotatably connected to the adjustment rod (14), and the other end is rotatably connected to the rear torque arm assembly (9), the adjustment screw (28) is rotatably mounted on the rear torque arm assembly (9), the adjustment screw (28) is threadedly connected to the adjustment arm (25), and enables the adjustment arm (25) to rotate relative to the rear torque arm assembly (9).

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