Rear suspension structure of all-terrain vehicle and all-terrain vehicle

Abstract

The rear suspension structure is connected to the rear portion of a vehicle frame and comprises a rear axle support used for installing wheels, two shock absorbers, two rocker arm rods and a rocker arm support, the rocker arm support is hinged to the rear portion of the vehicle frame, and the rocker arm support is rotationally connected with the rear axle support through a universal joint bearing. The two rocker levers are arranged on the left side and the right side of the rear axle support, one end of each rocker lever is rotationally connected with the frame through a universal joint bearing, the other end of each rocker lever is rotationally connected with the rear axle support through a universal joint bearing, the two dampers are arranged on the left side and the right side of the rear axle support, and one end of each damper is hinged to the rear portion of the frame. According to the structure, an independent suspension structure can be simulated, wheels on the two sides of the rear portion can have large independent vertical swing angles, comfort is good, the structure is simple, and cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to an all-terrain vehicle, especially to a rear suspension structure of all-terrain vehicle and all-terrain vehicle. BACKGROUND

[0002] All-terrain vehicle is also called "all-terrain four-wheel off-road motorcycle", including sand car, sand off-road kart and so on, its off-road performance is good, has wide tire to increase the contact area with the ground, produces greater friction and reduces the pressure of the vehicle on the ground, so that it is easy to drive on the beach, riverbed, forest road, stream, and harsh desert terrain.

[0003] The rear suspension of all-terrain vehicle on the market is generally longitudinal swing arm type, for example, the patent CN209738718U discloses an intelligent vehicle chassis with independent suspension system, which comprises a chassis frame, wheels, a rear axle rocker arm, a rear axle and a rear axle shock absorber, the rear axle rocker arm is hinged to the chassis frame, the rear axle is fixedly installed on the rear axle rocker arm and has wheels installed at both ends, and the rear axle shock absorber is hinged at one end to the chassis frame and at the other end to the rear axle. But when the structure is applied to kart, sand car and other vehicle models, the two rear wheels are at different heights when the kart, sand car and other vehicle models drive on uneven roads, and since the above rear axle rocker arm and the two rear wheels swing up and down at the same time, it is impossible to adjust according to the road conditions, so the vehicle body will be inclined, which makes the comfort and safety of the vehicle not ideal.

[0004] To solve the above problems, a single-side independent suspension structure appears on the market, for example, the patent CN103979056A discloses a rear suspension system of children's car, which is installed on a chassis, and comprises a shock absorber assembly, a support, a drive shaft and a swing arm. The shock absorber assembly and the swing arm are symmetrically distributed on both sides of the support, the support is fixed on the chassis, the swing arm is fixedly connected to the chassis, one end of the swing arm is hinged to one side of the chassis, the other end of the swing arm is fixedly connected with a steering knuckle, one end of the shock absorber assembly is hinged to the support, the other end of the shock absorber assembly is hinged to one end of the swing arm away from the chassis, a first mounting hole is formed in the steering knuckle, a rotating shaft is installed in the first mounting hole, one end of the rotating shaft is connected to a wheel, the other end of the rotating shaft is connected to the drive shaft, the drive shaft is connected to the rotating shaft through a universal joint, the other end of the drive shaft is connected to a power source, and the power source is installed on the chassis.

[0005] The two rear wheels on both sides are provided with a set of rear suspension systems, which can adjust the height of the rear wheels according to the road conditions, but the independent suspension structure on both sides makes it necessary to set up a separate half shaft between the chassis support and the wheels for transmission, and then connect the half shaft connecting the two wheels with the output structure, which makes the overall transmission complex, increases the cost, and the two sets of suspension structures separately control the swing of the wheels, which also increases the cost. UTILITY MODEL CONTENTS

[0006] In order to solve the problems of complicated transmission of the vehicle and high cost due to the rear suspension systems arranged on both sides of the rear wheel and the chassis support, the utility model provides a rear suspension structure of an all-terrain vehicle and the all-terrain vehicle.

[0007] The utility model discloses a rear suspension structure of an all-terrain vehicle, which is connected to the rear part of a vehicle frame, and comprises a rear axle support for mounting a wheel, two shock absorbers, two rocker arms and a rocker support.

[0008] The utility model further provides the following preferred technical scheme: the rocker support is a U-shaped support, which comprises two side rods arranged on the left and right sides and a tail rod connected between the ends of the two side rods.

[0009] The utility model further provides the following preferred technical scheme: the middle part of the tail rod is rotatably connected to the middle position of the top of the rear axle support through a universal joint bearing, and the end parts of the two rocker arms are rotatably connected to the bottoms of the two sides of the rear axle support through universal joint bearings.

[0010] The utility model further provides the following preferred technical scheme: the side rod is parallel or substantially parallel to the rocker arm on the same side below.

[0011] The utility model further provides the following preferred technical scheme: the shock absorber is inclinedly supported between the vehicle frame and the rear axle support.

[0012] The utility model further provides the following preferred technical scheme: a power output device for driving the wheel to rotate is mounted on the rear axle support, and the rear axle support semi-surrounds the power output device.

[0013] The utility model further provides the following preferred technical scheme: a wheel shaft is arranged horizontally on the rear axle support, the two ends of the wheel shaft protrude from the two sides of the rear axle support, and the two ends of the wheel shaft are provided with wheels located on the left and right sides of the rear axle support.

[0014] The further preferred technical scheme of the utility model is that two shock absorbers are arranged in parallel.

[0015] The further preferred technical scheme of the utility model is that the universal joint bearing is a spherical joint bearing.

[0016] Another subject: an all-terrain vehicle, comprising a frame and a rear suspension structure of the all-terrain vehicle.

[0017] Compared with the prior art, the utility model has the advantages that the structure comprises a rear axle support for mounting wheels, two shock absorbers, two rocker arms and a rocker support, the rocker support is hinged at the rear of the frame, the rocker support is rotatably connected with the rear axle support through a universal joint bearing, the two rocker arms are arranged on the left and right sides of the rear axle support, one end of the rocker arm is rotatably connected with the frame through a universal joint bearing, the other end of the rocker arm is rotatably connected with the rear axle support through a universal joint bearing, the two shock absorbers are arranged on the left and right sides of the rear axle support, one end of the shock absorber is hinged with the rear of the frame, the other end of the shock absorber is rotatably connected with the rear axle support through a universal joint bearing, the universal joint bearing is arranged to enable the connection to rotate at multiple angles, the movement direction is wide, the structure of the utility model can simulate an independent suspension structure, the wheels on the two sides of the rear can have a large independent up-down swing angle, the wheels on the two sides are allowed to form a left-right height difference, so that the wheels on the two sides can be adjusted in height according to the road surface when passing through uneven ground, and the wheels on the two sides can also swing up and down simultaneously with the rear axle support to adjust the height, so that the frame is not easy to tilt due to uneven road surface, thereby achieving better comfort, the shock absorber is used for shock absorption during the swinging of the rear axle support relative to the frame, to relieve the impact of uneven road surface on the frame, and compared with the half shaft type independent suspension structure, the structure enables the transmission of the wheels to be simple under the condition of achieving the same effect, without the need to arrange a half shaft for separate transmission, and the wheels on the two sides are controlled to swing up and down through the rocker arms and the rocker support connected between the rear axle support and the frame, so that the overall structure is also simpler, thereby reducing the cost. BRIEF DESCRIPTION OF DRAWINGS

[0018] The utility model will be further described in detail in combination with the drawings and preferred embodiments, but those skilled in the art will appreciate that these drawings are only drawn for the purpose of explaining the preferred embodiments, and therefore should not be regarded as a limitation on the scope of the utility model. In addition, unless specifically indicated, the drawings only schematically show the composition or structure of the described objects conceptually and can include exaggerated display, and the drawings are not necessarily drawn to scale.

[0019] Figure 1 It is an overall structure diagram of the all-terrain vehicle.

[0020] Figure 2 It is an installation diagram of the rear axle support, a power output device and two wheelsFigure 1

[0021] Figure 3 Schematic view of the mounting of the rear axle support, the power output device and the two wheels Figure 2

[0022] Figure 4 Schematic view of the mounting of the rear axle support, the power output device and the two wheels Figure 1

[0023] Figure 5 Schematic view of the mounting of the rear axle support, the power output device and the two wheels Figure 2

[0024] Figure 6 Schematic view of the mounting of the rear axle support, the power output device and the two wheels

[0025] Figure 7 Schematic view of the mounting of the rear axle support, the power output device and the two wheels

[0026] Figure 8 Schematic view of the mounting of the rear axle support, the power output device and the two wheels

[0027] Figure: 1, frame; 2, wheels; 3, rear suspension structure; 4, rear axle support; 5, axle; 6, driven sprocket; 7, driving sprocket; 8, chain; 9, power output device; 10, rocker support; 11, rocker arm; 12, universal joint bearing; 13, shock absorber; 14, side rod; 15, tail rod. DETAILED DESCRIPTION

[0028] The preferred embodiments of the present application will be described in detail below with reference to the attached drawings. Those skilled in the art will appreciate that the description is merely descriptive and exemplary, and should not be interpreted as limiting the scope of protection of the present application.

[0029] It should be noted that similar reference numerals refer to similar items in the following drawings, and therefore, once an item is defined in one drawing, it can not be further defined and explained in subsequent drawings.

[0030] Figures 1-8 As shown, the all-terrain vehicle comprises a frame 1, a rear suspension structure 3, two wheels 2 located on both sides of the front part of the frame 1, and two wheels 2 located on both sides of the rear part of the frame 1, and the rear suspension structure 3 is connected to the rear part of the frame 1.

[0031] Figures 4-8 ​​​​As shown, the rear suspension structure 3 comprises a rear axle support 4 for mounting the wheels 2, two shock absorbers 13, two swing arms 11 and a swing arm support 10, the swing arm support 10 is hinged at the rear of the frame 1, and the swing arm support 10 is rotatably connected with the rear axle support 4 through a universal joint bearing 12, the two swing arms 11 are arranged on the left and right sides of the rear axle support 4, one end of the swing arm 11 is rotatably connected with the frame 1 through a universal joint bearing 12, the other end of the swing arm 11 is rotatably connected with the rear axle support 4 through a universal joint bearing 12, the two shock absorbers 13 are arranged on the left and right sides of the rear axle support 4, one end of the shock absorber 13 is hinged at the rear of the frame 1, the other end of the shock absorber 13 is rotatably connected with the rear axle support 4 through a universal joint bearing 12.

[0032] The universal joint bearing 12 is provided to enable multi-angle rotation of the connection, the movement direction is wide, and the structure of the present patent can simulate an independent suspension structure, so that the wheels 2 on both sides of the rear can have a larger independent up-down swing angle, allowing the wheels 2 on both sides to form a left-right height difference, so that the wheels 2 on both sides can be adjusted in height according to the road conditions when passing over uneven ground, and the wheels 2 on both sides can also swing up and down with the rear axle support 4 to adjust the height, so that the frame 1 is not easily tilted due to uneven road surface, thereby achieving better comfort. The shock absorber 13 is used to absorb shock during the swinging of the rear axle support 4 relative to the frame 1, to alleviate the impact of uneven road surface on the frame 1. Compared with the half shaft type independent suspension structure, the transmission of the wheels 2 becomes simple under the same effect, without the need to set up a half shaft for separate transmission, and the wheels 2 on both sides are controlled to swing up and down through the swing arms 11 and the swing arm support 10 connected between the rear axle support 4 and the frame 1, so that the overall structure becomes simpler, thereby reducing the cost.

[0033] Preferably, the universal joint bearing 12 is a spherical joint bearing. The universal joint bearing 12 is a conventional bearing structure on the market, with a reference brand of KIF and a model of GE-ES joint bearing. The ball head for rotatably connecting the swing arm support 10 can be fixedly arranged on the rear axle support 4, the ball head for rotatably connecting the end of the shock absorber 13 can be fixedly arranged on the rear axle support 4, and the ball head for rotatably connecting the two ends of the swing arm 11 can be fixedly arranged on the frame 1 and the rear axle support 4.

[0034] The swing arm support 10 is hinged at the rear of the frame 1 through a horizontally arranged shaft, so that the swing arm support 10 can swing up and down relative to the frame 1 around the shaft.

[0035] Figure 6As shown, the rocker support 10 is a U-shaped support, which includes two side rods 14 arranged on the left and right sides and a tail rod 15 connected between one end of the two side rods 14, the other end of the two side rods 14 is hinged to the rear of the frame 1, the middle part of the tail rod 15 is rotatably connected to the rear axle support 4 through the universal joint bearing 12, the rear axle support 4 is stably arranged at the rear of the frame 1 through the three-point support structure formed by the rocker support 10 and the two rocker arms 11 connected to the middle part and the two sides of the rear axle support 4 respectively.

[0036] Figure 4 、 Figure 5 As shown, preferably, the middle part of the tail rod 15 is rotatably connected to the middle position of the top of the rear axle support 4 through the universal joint bearing 12, and the end part of the two rocker arms 11 is rotatably connected to the bottom of the two sides of the rear axle support 4 through the universal joint bearing 12.

[0037] Preferably, the side rod 14 is parallel or substantially parallel to the rocker arm 11 on the same side below, so that the side rod 14 and the rocker arm 11 combine to form a parallelogram structure, thereby making the stability of the rear axle support 4 relative to the frame 1 better.

[0038] Figure 5 、 Figure 7 As shown, the shock absorber 13 is hinged to the rear of the frame 1 through the horizontally arranged shaft, so that the shock absorber 13 can swing up and down relative to the frame 1 around the shaft. The shock absorber 13 is a conventional shock absorbing structure in the art, which can refer to the rear shock absorber of the brand Chuan Nan.

[0039] Preferably, the shock absorber 13 is inclinedly supported between the frame 1 and the rear axle support 4, and the inclined shock absorber 13 is more stressed to make the shock absorbing effect better when being pressed against each other. The two shock absorbers 13 are arranged in parallel at the rear of the frame 1.

[0040] Figure 2 、 Figure 3 As shown, the rear axle support 4 is provided with a power output device 9 for driving the rotation of the wheel 2, and the rear axle support 4 semi-surrounds the power output device 9 to achieve a certain protection effect on the power output device 9.

[0041] The rear axle support 4 is provided with a horizontally arranged wheel shaft 5, the two ends of the wheel shaft 5 protrude from the two sides of the rear axle support 4 respectively, and the two ends of the wheel shaft 5 are provided with the wheels 2 located on the left and right sides of the rear axle support 4, the power output device 9 has an output shaft parallel to the wheel shaft 5, the output shaft is provided with a driving sprocket 7, the wheel shaft 5 is provided with a driven sprocket 6, and the driving sprocket 7 and the driven sprocket 6 are driven through the chain 8, so that the two wheels 2 are driven to roll through one wheel shaft 5, and the transmission structure is simpler. The wheel shaft 5 and the output shaft can also be driven through a belt or other structure, and are not limited to the above-mentioned driving mode through the chain 8.

[0042] The above-mentioned power output device 9 can be an engine.

[0043] The rear suspension structure of the all-terrain vehicle and the all-terrain vehicle are introduced above, the principle and implementation mode of the present application are described by applying specific examples in this paper, and the above example is only used to help understand the present application and the core idea. It should be pointed out that for ordinary skilled persons in the art, without departing from the principle of the present application, the present application can be improved and modified in several ways, and these improvements and modifications also fall within the protection scope of the present application.

Claims

1. A rear suspension structure of an all-terrain vehicle, which is connected to a rear portion of a vehicle frame, characterized by comprising: The rear suspension structure comprises a rear axle support for mounting wheels, two shock absorbers, two swing arms and a swing arm support, the swing arm support is hinged at the rear of the frame, the swing arm support is rotatably connected with the rear axle support through a universal joint bearing, the two swing arms are arranged on the left and right sides of the rear axle support, one end of the swing arm is rotatably connected with the frame through a universal joint bearing, the other end of the swing arm is rotatably connected with the rear axle support through a universal joint bearing, and the two shock absorbers are arranged on the left and right sides of the rear axle support, one end of the shock absorber is hinged at the rear of the frame, and the other end of the shock absorber is rotatably connected with the rear axle support through a universal joint bearing.

2. The rear suspension structure of an all-terrain vehicle according to claim 1, characterized by, The swing arm support is a U-shaped support, the swing arm support comprises two side rods arranged on the left and right sides and a tail rod connected between one end of the two side rods, the other end of the two side rods is hinged at the rear of the frame, and the middle part of the tail rod is rotatably connected with the rear axle support through a universal joint bearing.

3. The rear suspension structure of an all-terrain vehicle according to claim 2, characterized by, The middle part of the tail rod is rotatably connected with the middle position of the top of the rear axle support through a universal joint bearing, and the end of the two swing arms is rotatably connected with the bottom of the two sides of the rear axle support through a universal joint bearing.

4. The rear suspension structure of an all-terrain vehicle according to claim 3, characterized by The side rod is parallel or substantially parallel to the swing arm rod on the same side below.

5. The rear suspension structure of an all-terrain vehicle according to claim 1, characterized by, The shock absorber is inclinedly supported between the frame and the rear axle support.

6. The rear suspension structure of an all-terrain vehicle according to claim 1, characterized by, The rear axle support is provided with a power output device for driving the wheels to rotate, and the rear axle support semi-surrounds the power output device.

7. The rear suspension structure of an all-terrain vehicle according to claim 6, characterized by The rear axle support is provided with a transversely arranged wheel shaft, the two ends of the wheel shaft protrude from the two sides of the rear axle support, the two ends of the wheel shaft are provided with wheels arranged on the left and right sides of the rear axle support, the power output device has an output shaft parallel to the wheel shaft, the output shaft is provided with a driving sprocket, the wheel shaft is provided with a driven sprocket, and the driving sprocket and the driven sprocket are driven through a chain.

8. The rear suspension structure of an all-terrain vehicle according to claim 1 or 5, characterized by, The two shock absorbers are arranged in parallel.

9. The rear suspension structure of an all-terrain vehicle according to claim 1, characterized by, The universal joint bearing is a spherical joint bearing.

10. An all-terrain vehicle characterized by, The rear suspension structure of the all-terrain vehicle comprises a frame and any one of claims 1-9. The rear suspension structure of the all-terrain vehicle comprises a frame and any one of claims 1-9.

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