Overall rear axle suspension mechanism of all-terrain vehicle

Abstract

The utility model relates to an all-terrain vehicle integral rear axle suspension mechanism which comprises a rear axle, a frame, a connecting mechanism and a damping device, one end of the connecting mechanism and one end of the damping device are fixedly connected with the rear axle, the other end of the connecting mechanism and the other end of the damping device are fixedly connected with the frame, and the connecting mechanism is two supporting rods symmetrically arranged between the rear axle and the frame. The supporting rod comprises a connecting rod and connecting pieces fixedly installed at the two ends of the connecting rod, the frame and the rear axle are each symmetrically provided with two fixing parts, the connecting pieces are first fisheye bearings, and inner rings of the first fisheye bearings are fixedly connected with the fixing parts. According to the design, heavy load and impact can be borne, the stability is high, meanwhile, the flexibility among the frame, the connecting mechanism and the rear axle is enhanced, the frame, the connecting mechanism and the rear axle have certain freedom degrees in the vertical direction and the horizontal direction, the flexibility is beneficial to improving the escape capacity of a vehicle when facing complex road conditions, and the safety of the vehicle is improved. In this way, the problem that a non-suspension system is poor in treatment capacity on a bumpy road surface can be solved to a certain extent.

Description

TECHNICAL FIELD

[0001] The utility model relates to all terrain vehicle technical field especially relates to a whole rear axle suspension mechanism of all terrain vehicle. BACKGROUND

[0002] All terrain vehicle is a kind of light vehicle specially designed for driving on non-hardened pavement, with strong off-road capability and adaptability, and has the ability to drive on various complex terrains, and is widely used in entertainment, agriculture, commerce and military and other fields.

[0003] The rear axle of all terrain vehicle is mostly non-independent suspension, which connects the wheels on the left and right sides together through a whole frame or structural member, and has relatively simple structure, high durability, so that all terrain vehicle can still maintain stable performance in bad road conditions.

[0004] Nowadays, the connecting rod between the rear axle and the frame is mostly fixed in a hinged manner, and the connection is sealed by rubber bushing, which can reduce the impact on the frame and the rear axle during vehicle driving to some extent, and prolong the service life of the vehicle. However, the non-independent suspension has weak processing ability for bumpy road, and the hinged connection with rubber bushing makes the rotating part have large friction, and the combination of the two has strong stability and can bear heavy load and impact, but the flexibility of the connection is poor, which leads to poor escape ability of all terrain vehicle with non-independent suspension when facing complex road conditions such as potholes, mud or snow, and cannot meet the use requirements. SUMMARY

[0005] In view of the defects in the prior art, the technical problem to be solved by the utility model is to provide a whole rear axle suspension mechanism of all terrain vehicle, which can bear heavy load and impact while having strong flexibility, so as to improve the escape ability of all terrain vehicle with non-independent suspension when facing complex road conditions such as potholes, mud or snow.

[0006] To solve the above technical problems, the utility model provides a whole rear axle suspension mechanism of all terrain vehicle, which adopts the following technical scheme:

[0007] A whole rear axle suspension mechanism of all terrain vehicle, comprising a rear axle, a frame, a connecting mechanism and a damping device, one end of the connecting mechanism and the damping device is fixedly connected with the rear axle, and the other end is fixedly connected with the frame, the connecting mechanism is two supporting rods symmetrically arranged between the rear axle and the frame, the supporting rod comprises a connecting rod and a connecting piece fixedly installed at both ends of the connecting rod, the frame and the rear axle are symmetrically provided with two fixed parts, the connecting piece is a first fisheye bearing, and the inner ring of the first fisheye bearing is fixedly connected with the fixed part.

[0008] The fish eye bearing is used as a connecting mechanism to connect the connecting piece between the rear axle and the frame. Compared with the previous hinge plus rubber bushing sealing method, the fish eye bearing has a special spherical structure, which can allow the connecting mechanism to have a certain degree of freedom in the vertical and horizontal directions, thus improving the flexibility of the connection, so that the frame and the rear axle connected with the connecting mechanism are more flexible, which helps to improve the vehicle's ability to escape from complex road conditions such as pits, mud or snow, and to a certain extent, make up for the problem that the non-suspension system itself has weak processing ability for bumpy roads. At the same time, compared with other rigid connecting pieces, the fish eye bearing has a special spherical structure design, so that the bearing can evenly distribute the load in all directions, thereby improving the carrying capacity. The two symmetrical support rods arranged as the connecting mechanism can ensure that the connection between the rear axle and the frame is more stable, which can effectively disperse the vibration and impact from the road, improve the driving stability and ride comfort of the vehicle on complex terrain.

[0009] Further, the distance between the two fixed parts on the rear axle is greater than the distance between the two fixed parts on the frame. The fixed part is an important part of the connecting support rod. If the distance between the fixed parts arranged on the frame and the rear axle is the same, the two support rods connected thereto are in a parallel state. Thus, when facing bumpy or curved driving, the rear axle will lose stability due to excessive flexibility, which may result in vehicle loss of control. The design that the distance between the two fixed parts on the rear axle is greater than the distance between the two fixed parts on the frame makes the extension lines of the two support rods have a certain angle, so that the movement of the rear axle is limited within a certain range, thereby helping the vehicle to maintain a more stable posture at high speed or in complex road conditions, and enhancing the maneuverability and stability of the vehicle when turning, reducing the risk of rollover or loss of control.

[0010] As a preferred embodiment, a U-shaped support structure is further included, which is arranged above the connecting mechanism and is mounted on the rear axle and the frame. As a support element, the U-shaped support structure can significantly enhance the connection strength between the rear axle and the frame, which helps to prevent relative displacement or deformation between the rear axle and the frame under heavy load or harsh road conditions, thereby ensuring the stability and safety of the vehicle. On the other hand, the U-shaped support structure helps to improve the handling performance of the vehicle, which makes the vehicle more stable during dynamic driving such as turning, accelerating and braking, thereby improving the safety of driving.

[0011] As preferred, the U-shaped support structure comprises a U-shaped support frame and a second fish-eye bearing, two connecting portions are symmetrically arranged on the vehicle frame, the two ends of the U-shaped support frame are rotatably connected with the connecting portions, the second fish-eye bearing is fixedly arranged at the center of the U-shaped support frame, the rear axle center is provided with a fixing member, and the inner ring of the second fish-eye bearing is fixedly connected with the fixing member. The rotatable connection of the two ends of the U-shaped support frame with the connecting portions on the vehicle frame increases the flexibility and adaptability of the vehicle to different road conditions. When the vehicle is running on uneven or complex terrain, this design can effectively alleviate the impact and vibration caused by uneven road surface. The fish-eye bearing connection between the center of the U-shaped support frame and the rear axle center not only provides strong support force, but also ensures the stability of the U-shaped support structure under heavy load.

[0012] As preferred, a rubber bushing is arranged between the two ends of the U-shaped support frame and the connecting portions, and the rubber bushing is fixedly connected with the U-shaped support frame. The rubber bushing has good elasticity and damping performance, which can provide additional buffering and fault tolerance capability, effectively absorb and alleviate the larger vibration or impact encountered during driving, thereby reducing noise and vibration during vehicle driving. On the other hand, the presence of the rubber bushing enhances the friction at the connection between the U-shaped support frame and the vehicle frame, thereby enhancing the stability and reliability of the structure.

[0013] As preferred, two shock absorbers are symmetrically installed between the rear axle and the vehicle frame. The shock absorber comprises a shock absorber cylinder, a piston rod and a shock absorber spring. The shock absorber cylinder and the piston rod are fixedly connected with the vehicle frame and the rear axle respectively. The shock absorber spring is arranged outside the shock absorber cylinder and the piston rod. The piston rod and the shock absorber cylinder are in sliding fit, and the piston rod reciprocates in the shock absorber cylinder. One end of the shock absorber spring is fixedly connected with the shock absorber cylinder, and the other end of the shock absorber spring is fixedly provided with a limiting piece. The limiting piece is in sliding fit with the piston rod, and the piston rod is provided with a limiting portion. The shock absorber can effectively absorb and alleviate the vibration and impact caused by uneven road surface or vehicle movement through the synergistic effect of the shock absorber cylinder, the piston rod and the shock absorber spring. The symmetric installation of the shock absorber between the rear axle and the vehicle frame helps to maintain the stability of the vehicle during driving. Even in complex road conditions, the shock absorber can evenly distribute and alleviate the vibration, preventing the vehicle from tilting or shaking excessively. The design of the limiting piece and the limiting portion can prevent the shock absorber spring from being excessively compressed or stretched in extreme cases, thereby protecting the shock absorber from damage.

[0014] In summary, the whole terrain vehicle integral rear axle suspension mechanism can not only bear heavy load and impact and has strong stability, but also enhances the flexibility between the frame, the connecting mechanism and the rear axle, so that the vehicle has certain degrees of freedom in the vertical and horizontal directions, and the flexibility helps to improve the vehicle's escape ability when facing complex road conditions such as pits, mud or snow, so as to make up for the problem that the non-suspension system itself has weak processing capacity for bumpy road. BRIEF DESCRIPTION OF DRAWINGS

[0015] The utility model will be further explained in detail in combination with the drawings and specific embodiments.

[0016] Figure 1 is the general assembly structure schematic diagram of the utility model;

[0017] Figure 2 is the utility model Figure 1 B enlarged view;

[0018] Figure 3 is the utility model Figure 1 A enlarged view;

[0019] Figure 4 is the shock absorber structure schematic diagram of the utility model;

[0020] Wherein, rear axle-1, fixed part-11, frame-2, fixed part-21, connecting part-22, connecting mechanism-3, support rod-31, connecting rod-311, connecting part-312, first fisheye bearing-313, shock absorber-4, shock absorber cylinder-41, piston rod-42, limiting part-421, shock absorbing spring-43, limiting part-44, U-shaped support structure-5, U-shaped support frame-51, second fisheye bearing-52, rubber bushing-521. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the utility model will be further explained in detail in combination with the drawings and examples.

[0022] As Figure 1 And Figure 2 A kind of whole terrain vehicle integral rear axle suspension mechanism shown in the drawings, including rear axle 1, frame 2, connecting mechanism 3 and shock absorber 4, connecting mechanism 3 and shock absorber 4 are fixedly connected with rear axle 1, and the other end is fixedly connected with frame 2, connecting mechanism 3 is two support rods 31 symmetrically arranged between rear axle 1 and frame 2, support rod 31 includes connecting rod 311 and connecting part 312 fixedly installed at the both ends of connecting rod 311, frame 2 and rear axle 1 are symmetrically provided with two fixed parts 21, connecting part 312 is first fisheye bearing 313, and the inner ring of first fisheye bearing 313 is fixedly connected with fixed part 21.

[0023] The fish-eye bearing is used as the connecting piece 312 connecting the rear axle 1 and the frame 2, compared with the previous way of using hinge plus rubber bushing 521 sealing, the fish-eye bearing has a special spherical structure, which can allow the connecting mechanism 3 to have a certain degree of freedom in the vertical and horizontal directions, thus improving the flexibility of the connection, so that the frame 2 and the rear axle 1 connected with the connecting mechanism 3 are more flexible, which helps to improve the vehicle's ability to escape from complex road conditions such as pits, mud or snow, and to some extent, make up for the problem that the non-suspension system itself has weak processing ability for bumpy road. At the same time, compared with other rigid connecting pieces 312, the fish-eye bearing has a special spherical structure design, so that the bearing can evenly distribute the load in all directions, thereby improving the carrying capacity. The two symmetrical support rods 31 are arranged as the connecting mechanism 3, which can ensure that the connection between the rear axle 1 and the frame 2 is more stable, which can effectively disperse the vibration and impact from the road, improve the driving stability and ride comfort of the vehicle on complex terrain.

[0024] Further, as shown in Figure 2 The distance between the two fixed parts 21 on the rear axle 1 is greater than the distance between the two fixed parts 21 on the frame 2. The fixed part 21 is an important part of the connecting support rod 31. If the distance between the fixed parts 21 arranged on the frame 2 and the rear axle 1 is the same, the two support rods 31 connected thereto are in a parallel state. Thus, when facing bumpy or curved driving, the rear axle 1 will lose stability due to excessive flexibility, which may result in vehicle loss of control. The design that the distance between the two fixed parts 21 on the rear axle 1 is greater than the distance between the two fixed parts 21 on the frame 2 makes the extension lines of the two support rods 31 have a certain angle, so that the movement of the rear axle 1 is limited within a certain range, thereby helping the vehicle to maintain a more stable posture when driving at high speed or in complex road conditions, and enhancing the vehicle's handling and stability when turning, reducing the risk of rollover or loss of control.

[0025] As a preferred embodiment, as shown in Figure 1 The U-shaped support structure 5 is arranged above the connecting mechanism 3 and is installed on the rear axle 1 and the frame 2. As a support element, the U-shaped support structure 5 can significantly enhance the connection strength between the rear axle 1 and the frame 2, which helps to prevent relative displacement or deformation between the rear axle 1 and the frame 2 under heavy load or harsh road conditions, thereby ensuring the stability and safety of the vehicle. On the other hand, the U-shaped support structure 5 helps to improve the vehicle's handling performance, making the vehicle more stable during dynamic driving such as turning, accelerating and braking, thereby improving the safety of driving.

[0026] As a preferred embodiment, as shown inFigure 1 As shown, the U-shaped support structure 5 includes a U-shaped support frame 51 and a second fish-eye bearing 52, two connecting portions 22 are symmetrically arranged on the vehicle frame 2, the two ends of the U-shaped support frame 51 are rotationally connected with the connecting portions 22, the second fish-eye bearing 52 is fixedly arranged at the center of the U-shaped support frame 51, the center of the rear axle 1 is provided with a fixing member 11, and the inner ring of the second fish-eye bearing 52 is fixedly connected with the fixing member 11. The rotationally connecting of the two ends of the U-shaped support frame 51 with the connecting portions 22 on the vehicle frame 2 enables the U-shaped support structure 5 to rotate within a certain range, thereby increasing the flexibility and adaptability of the vehicle to different road conditions. When the vehicle is running on uneven or complex terrain, this design can effectively alleviate the impact and vibration caused by uneven road surface. The center of the U-shaped support frame 51 is connected with the center of the rear axle 1 by the fish-eye bearing, which not only provides strong support force, but also ensures the stability of the U-shaped support structure 5 when bearing heavy load

[0027] As preferred, as shown in Figure 3 The two ends of the U-shaped support frame 51 and the connecting portions 22 are provided with rubber bushings 521, and the rubber bushings 521 are fixedly connected with the U-shaped support frame 51. The rubber bushings 521 have good elasticity and damping performance, which can provide additional buffering and fault tolerance on one hand, effectively absorb and alleviate the larger vibration or impact encountered during driving, thereby reducing the noise and vibration during driving of the vehicle; on the other hand, the existence of the rubber bushings 521 enhances the friction force at the connecting portion between the U-shaped support frame 51 and the vehicle frame 2, thereby enhancing the stability and reliability of the structure.

[0028] As preferred, as shown in Figure 1 and Figure 4As shown, the shock-absorbing device 4 is provided with two and symmetrically installed between the rear axle 1 and the frame 2, the shock-absorbing device 4 includes a shock-absorbing cylinder 41, a piston rod 42 and a shock-absorbing spring 43, the shock-absorbing cylinder 41 and the piston rod 42 are fixedly connected with the frame 2 and the rear axle 1 respectively, the shock-absorbing spring 43 is arranged outside the shock-absorbing cylinder 41 and the piston rod 42, the piston rod 42 and the shock-absorbing cylinder 41 are slidingly fitted, the piston rod 42 reciprocates inside the shock-absorbing cylinder 41, one end of the shock-absorbing spring 43 is fixedly connected with the shock-absorbing cylinder 41, the other end of the shock-absorbing spring 43 is fixedly provided with a limiting piece 44, the limiting piece 44 is slidingly fitted with the piston rod 42, and the piston rod 42 is provided with a limiting portion 421. The shock-absorbing device 4 can effectively absorb and relieve the vibration and impact caused by the uneven road surface or the movement of the vehicle through the synergistic effect of the shock-absorbing cylinder 41, the piston rod 42 and the shock-absorbing spring 43. The shock-absorbing device 4 is symmetrically installed between the rear axle 1 and the frame 2, which helps to maintain the stability of the vehicle during driving, and the shock-absorbing device 4 can evenly distribute and relieve the vibration even in complex road conditions, preventing the vehicle from tilting or shaking excessively. The design of the limiting piece 44 and the limiting portion 421 can prevent the shock-absorbing spring 43 from being compressed or stretched excessively in extreme cases, thereby protecting the shock-absorbing device 4 from damage.

[0029] In summary, the whole rear axle suspension mechanism of the all-terrain vehicle not only has strong stability to withstand heavy load and impact, but also enhances the flexibility between the frame, the connecting mechanism and the rear axle, so that it has a certain degree of freedom in the vertical and horizontal directions. When facing complex road conditions such as potholes, mud or snow, this flexibility helps to improve the vehicle's ability to escape from trouble, which can to some extent make up for the weak handling ability of the non-suspension system on bumpy roads.

[0030] In summary, the above only describes the preferred embodiments of the present application and does not limit the present application, any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An integral rear axle suspension mechanism of an all-terrain vehicle, comprising a rear axle (1), a vehicle frame (2), a connecting mechanism (3) and a shock absorbing device (4), one end of the connecting mechanism (3) and the shock absorbing device (4) being fixedly connected to the rear axle (1), and the other end of the connecting mechanism (3) and the shock absorbing device (4) being fixedly connected to the vehicle frame (2), characterized in that: The connecting mechanism (3) is two supporting rods (31) symmetrically arranged between the rear axle (1) and the frame (2), the supporting rod (31) comprises a connecting rod (311) and a connecting piece (312) fixedly installed at both ends of the connecting rod (311), the frame (2) and the rear axle (1) are symmetrically provided with two fixed parts (21), the connecting piece (312) is a first fisheye bearing (313), and the inner ring of the first fisheye bearing (313) is fixedly connected with the fixed part (21).

2. The whole-vehicle integral rear suspension mechanism for an all-terrain vehicle according to claim 1, characterized by: The distance between the two fixed parts (21) on the rear axle (1) is greater than the distance between the two fixed parts (21) on the frame (2).

3. The whole-vehicle integral rear suspension mechanism for an all-terrain vehicle according to claim 1, characterized by: A U-shaped support structure (5) is further included, the U-shaped support structure (5) is arranged above the connecting mechanism (3), and the U-shaped support structure (5) is installed on the rear axle (1) and the frame (2).

4. The whole-vehicle integral rear suspension mechanism of an all-terrain vehicle according to claim 3, characterized by: The U-shaped support structure (5) comprises a U-shaped support frame (51) and a second fisheye bearing (52), the frame (2) is symmetrically provided with two connecting parts (22), the two ends of the U-shaped support frame (51) are rotatably connected with the connecting parts (22), the second fisheye bearing (52) is fixedly arranged at the center of the U-shaped support frame (51), the rear axle (1) is provided with a fixing piece (11) at the center, and the inner ring of the second fisheye bearing (52) is fixedly connected with the fixing piece (11).

5. The whole-vehicle integral rear suspension mechanism for an all-terrain vehicle according to claim 4, characterized by: Rubber bushings (521) are arranged between the two ends of the U-shaped support frame (51) and the connecting parts (22), and the rubber bushings (521) are fixedly connected with the U-shaped support frame (51).

6. The whole-vehicle integral rear suspension mechanism for an all-terrain vehicle according to claim 1, characterized by: The damping device (4) is provided with two and symmetrically installed between the rear axle (1) and the frame (2), the damping device (4) comprises a damping cylinder (41), a piston rod (42) and a damping spring (43), the damping cylinder (41) and the piston rod (42) are fixedly connected with the frame (2) and the rear axle (1) respectively, the damping spring (43) is arranged outside the damping cylinder (41) and the piston rod (42), the piston rod (42) and the damping cylinder (41) are in sliding fit, the piston rod (42) reciprocates in the damping cylinder (41), one end of the damping spring (43) is fixedly connected with the damping cylinder (41), the other end of the damping spring (43) is fixedly provided with a limiting piece (44), the limiting piece (44) is in sliding fit with the piston rod (42), and the piston rod (42) is provided with a limiting part (421).

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