Electric tricycle double trailing arm rear suspension system

Abstract

This utility model relates to a double trailing arm rear suspension system for electric tricycles, including a frame and a shock absorber assembly. The frame is movably mounted to the rear axle assembly via tie rods, longitudinal tie rods, and the shock absorber assembly. The frame handlebars are fixedly mounted at the front of the frame body. Longitudinal tie rod supports are welded to both sides of the middle of the frame body. The ends of the tie rods are hinged to the rear axle tie rod supports and tie rod supports, respectively. Two parallel longitudinal tie rods are provided on one side of the frame body. One end of the two parallel longitudinal tie rods is hinged to the longitudinal tie rod rear axle lower support and longitudinal tie rod rear axle upper support, and the other end is hinged to the longitudinal tie rod support. The two shock absorber assemblies are connected to the shock absorber supports and the rear axle body, respectively. By setting two longitudinal tie rods, the structural strength and service life of the vehicle suspension are improved, while maintenance is facilitated. This also disperses the stress on the single trailing arm structure electric vehicle suspension, extending the product's lifespan.

Description

Technical Field

[0001] This utility model relates to a three-wheeled vehicle chassis, specifically an electric three-wheeled vehicle double trailing arm rear suspension system. Background Technology

[0002] The existing three-wheeled electric vehicles or four-wheeled low-speed electric vehicles mostly use a single-sided single trailing arm structure in their trailing arm and solid axle suspensions. The trailing arm and axle are connected by only one hard connection point, which leads to concentrated stress on the suspension and short product life.

[0003] Currently, a utility model patent with publication number CN203957775U discloses a high-precision centering positioning device, belonging to the field of non-motorized vehicles. It includes a frame, shock absorber springs, dampers, a rear axle assembly, and a trailing arm. Its key feature is that the main beam of the frame is formed by bending a single tube, which is welded to the handlebar main beam tube at both ends. Its suspension system consists of shock absorber springs, dampers, tie rods, and a trailing arm. This improved tricycle chassis uses shock absorber springs and dampers together to bear the load, resulting in better shock absorption and increased driving comfort. The addition of tie rods ensures that the rear axle assembly and vehicle do not experience lateral displacement during shock absorption, thus guaranteeing the stability of the suspension system. Replacing the adjusting rod with a trailing arm increases the stability of the suspension when the vehicle is moving forward. The integrated frame reduces weld joints, thereby reducing welding deformation and improving frame strength.

[0004] As can be seen from the above-disclosed technical content, the utility model with announcement number CN203957775U, as prior art, uses a shock-absorbing spring and a damper together to bear the load, which can not only withstand the load from the vehicle weight and cargo, but also completely alleviate the impact from the road surface. It is much better than the original leaf spring shock absorber, and at the same time increases the driving comfort. However, the trailing arm of this patent is movably connected to the rear axle assembly. Without the control of the damping rod, the spring vibration is difficult to control when passing through bumpy roads, and the vehicle is very prone to excessive bouncing, affecting the ride experience. Utility Model Content

[0005] To address the problems existing in the prior art, this utility model provides a double trailing arm rear suspension system for electric tricycles, which can distribute the stress on the single trailing arm structure of electric vehicle suspension and improve product lifespan.

[0006] To achieve the above objectives, this utility model discloses a double trailing arm rear suspension system for an electric tricycle, comprising a frame, a frame body, longitudinal tie rod supports, shock absorber supports, lateral tie rod supports, a frame leader, a rear axle assembly, a rear axle body, rear axle lateral tie rod supports, longitudinal tie rod lower rear axle supports, longitudinal tie rod upper rear axle supports, lateral tie rods, longitudinal tie rods, and a shock absorber assembly. The rear axle assembly is movably mounted on the frame via the lateral tie rods, longitudinal tie rods, and shock absorber assembly. A frame leader is fixedly mounted on the front of the frame body, longitudinal tie rod supports are welded to both sides of the middle section of the frame body, and shock absorber supports are welded to both sides of the rear of the frame body. The inner side of the frame body is welded and installed with a lateral tie rod support; on both sides of the rear axle body of the rear axle assembly, near the wheels, symmetrically arranged longitudinal tie rod lower rear axle supports and longitudinal tie rod upper rear axle supports are installed respectively; the upper part of the rear axle body near the longitudinal tie rod upper rear axle supports is welded with a rear axle lateral tie rod support; the two ends of the lateral tie rod are respectively hinged to the rear axle lateral tie rod support and the lateral tie rod support; two parallel longitudinal tie rods are provided on one side of the frame body, one end of the two parallel longitudinal tie rods is hinged to the longitudinal tie rod lower rear axle support and the longitudinal tie rod upper rear axle support, and the other end is hinged to the longitudinal tie rod support; the two shock absorber assemblies are respectively connected to the shock absorber supports and the rear axle body at both ends.

[0007] In addition, the electric tricycle double trailing arm rear suspension system proposed in the above embodiments of this utility model may also have the following additional technical features:

[0008] As a further improvement of this utility model, both ends of the horizontal tie rod and the vertical tie rod are provided with a rubber buffer and shock absorption structure.

[0009] As a further improvement of this utility model, the shock absorber assembly is provided with rubber buffer and shock absorption structures at both ends.

[0010] As a further improvement of this utility model, the shock absorber support is provided with a reinforcing protrusion extending to the vehicle frame body.

[0011] As a further improvement of this utility model, the distance between the two parallel longitudinal tie rods on one side of the frame body is five to eight centimeters.

[0012] By means of the above solution, this utility model has at least the following advantages: by setting two longitudinal tie rods 4, the strength and service life of the vehicle suspension structure are improved, and maintenance is convenient. It can also distribute the stress on the single longitudinal arm structure electric vehicle suspension and improve the product life. Attached Figure Description

[0013] Figure 1 This is a three-dimensional schematic diagram of the double trailing arm rear suspension system of an electric tricycle.

[0014] Figure 2 This is a 3D view of the chassis of an electric tricycle with a double trailing arm rear suspension system.

[0015] Figure 3 This is a three-dimensional drawing of the rear axle assembly of the double trailing arm rear suspension system for an electric tricycle.

[0016] In the diagram: 1. Frame, 11. Frame body, 12. Longitudinal tie rod support, 13. Shock absorber support, 14. Transverse tie rod support, 15. Frame handlebar, 2. Rear axle assembly, 21. Rear axle body, 22. Rear axle transverse tie rod support, 23. Longitudinal tie rod rear axle lower support, 24. Longitudinal tie rod rear axle upper support, 3. Transverse tie rod, 4. Longitudinal tie rod, 5. Shock absorber assembly. Detailed Implementation

[0017] The following description, in conjunction with the accompanying drawings, describes the electric tricycle's double trailing arm rear suspension system of this utility model.

[0018] In Embodiment 1 of this application, as Figures 1 to 3 As shown, the electric tricycle's double trailing arm rear suspension system (hereinafter referred to as "the present invention") includes a frame 1, a rear axle assembly 2, a tie rod 3, and a shock absorber assembly 5. The frame 1 is movably mounted to the rear axle assembly 2 via the tie rod 3, longitudinal tie rod 4, and shock absorber assembly 5. A frame handlebar 15 is fixedly mounted on the front of the frame body 11 of the frame 1. Longitudinal tie rod supports 12 are welded to both sides of the middle of the frame body 11. Shock absorber supports 13 are welded to both sides of the rear of the frame body 11. A tie rod support 14 is welded to one side of the inner side of the frame body 11. The rear axle body 21 of the rear axle assembly 2 is located near the vehicle on both sides. The rear axle lower support 23 and the rear axle upper support 24 of the longitudinal tie rod are symmetrically arranged at the wheel. The rear axle transverse tie rod support 22 is welded to the upper part of the rear axle body 21 near the rear axle upper support 24 of the longitudinal tie rod. The two ends of the transverse tie rod 3 are respectively hinged to the rear axle transverse tie rod support 22 and the transverse tie rod support 14. Two parallel longitudinal tie rods 4 are provided on one side of the frame body 11. One end of the two parallel longitudinal tie rods 4 is hinged to the rear axle lower support 23 and the rear axle upper support 24 of the longitudinal tie rod, and the other end is hinged to the longitudinal tie rod support 12. The two shock absorber assemblies 5 are respectively connected to the shock absorber support 13 and the rear axle body 21.

[0019] A high-precision centering positioning device (hereinafter referred to as "the patent") with utility model announcement number CN203957775U uses a shock-absorbing spring and a damper together to bear the load, which can not only bear the load from the vehicle weight and cargo, but also completely alleviate the impact from the road surface. It has a much better shock absorption effect than the original leaf spring type, and at the same time increases the driving comfort. However, the trailing arm of the patent is movably connected to the rear axle assembly. Without the control of the damping rod, the spring vibration is difficult to control when passing through bumpy roads, and the vehicle is prone to excessive bouncing, which affects the ride comfort. The present invention improves the structural strength and service life of the vehicle suspension by setting two longitudinal tie rods 4, while facilitating maintenance. It can distribute the force of the single longitudinal arm structure electric vehicle suspension, improve product life, and suppress excessive vibration by combining the spring and the damping rod to form a shock absorber assembly 5, effectively improving comfort.

[0020] This second embodiment is basically the same in structure as the first embodiment, the difference being that, as Figure 1 As shown, the two parallel longitudinal tie rods 4 on one side of the frame body 11 are spaced five to eight centimeters apart, with a spacing of 6 centimeters being optimal.

[0021] To further optimize the working efficiency and improve comfort, both ends of the lateral tie rod 3 and longitudinal tie rod 4 are provided with rubber buffer and shock absorption structures. Both ends of the shock absorber assembly 5 are also provided with rubber buffer and shock absorption structures. To further enhance the strength of the shock absorber support 13, the shock absorber support 13 is provided with reinforcing protrusions extending to the frame body 11.

[0022] Once the double trailing arm rear suspension system of the electric tricycle is installed, the equipment can be put into use.

[0023] Two longitudinal tie rods 4 are provided on the left and right sides respectively. The longitudinal tie rods 4 can control the movement of the rear axle assembly 2 in the X direction and the rotation of the axle itself around the axis.

[0024] Using fasteners, the two ends of the tie rod 3 are respectively assembled with the tie rod support 14 on the frame body 11 and the rear axle tie rod support 22 on the rear axle assembly 2. The tie rod 3 can control the movement of the rear axle assembly 2 in the Y direction.

[0025] In summary, the electric tricycle double trailing arm rear suspension system of this utility model improves the structural strength and service life of the vehicle suspension by setting two longitudinal tie rods 4, while also facilitating maintenance, distributing the stress on the single trailing arm structure electric vehicle suspension, and extending the product life.

[0026] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention is limited to these examples; within the framework of the invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity. Any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the invention should be included within the scope of protection of the invention.

Claims

1. An electric tricycle double wishbone rear suspension system comprising a frame (1) and a rear axle assembly (2), characterized in that, The frame (1) is movably mounted to the rear axle assembly (2) via a cross tie rod (3), a longitudinal tie rod (4), and a shock absorber assembly (5). The frame body (11) of the frame (1) has a fixed frame handle (15) at the front. The longitudinal tie rod supports (12) are welded to both sides of the middle of the frame body (11). The shock absorber supports (13) are welded to both sides of the rear of the frame body (11). The cross tie rod supports (14) are welded to one side of the inner side of the frame body (11). The rear axle body (21) of the rear axle assembly (2) has symmetrically arranged longitudinal tie rod rear axle supports (23) and longitudinal tie rods on both sides near the wheels. The rear axle upper support (24) is attached to the rear axle body (21), and the rear axle cross tie rod support (22) is welded to the upper part of the rear axle body (21) near the longitudinal tie rod rear axle upper support (24). The two ends of the cross tie rod (3) are respectively hinged to the rear axle cross tie rod support (22) and the cross tie rod support (14). Two parallel longitudinal tie rods (4) are provided on one side of the frame body (11). One end of the two parallel longitudinal tie rods (4) is hinged to the longitudinal tie rod rear axle lower support (23) and the longitudinal tie rod rear axle upper support (24), and the other end is hinged to the longitudinal tie rod support (12). The two shock absorber assemblies (5) are respectively connected to the shock absorber support (13) and the rear axle body (21).

2. The electric three-wheeler double trailing arm rear suspension system as claimed in claim 1 wherein, Both ends of the horizontal tie rod (3) and the vertical tie rod (4) are equipped with rubber buffer and shock absorption structures.

3. The electrically driven three-wheeled vehicle dual trailing arm rear suspension system of claim 2, wherein, The shock absorber assembly (5) is provided with rubber buffer and shock absorption structures at both ends.

4. The electrically driven three-wheeled vehicle dual trailing arm rear suspension system of claim 1, wherein, The shock absorber support (13) is provided with a reinforcing protrusion extending to the frame body (11).

5. The electrically driven three-wheeled vehicle dual trailing arm rear suspension system of claim 4, wherein, The two parallel longitudinal tie rods (4) on one side of the frame body (11) are spaced five to eight centimeters apart.

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