A trike rear axle suspension system

Abstract

The utility model discloses a tricycle rear axle damping system is arranged between rear axle pipe and frame, including a pair of damping spring, the middle part of rear axle pipe is provided with gearbox, and gearbox is connected with rotating shaft, and rotating shaft is connected with balance link, both ends of balance link all are connected with spring damper, and the other end of spring damper is connected with frame, both ends of the upper end surface of rear axle pipe all are connected with leaf spring, and both ends of leaf spring all are connected with lifting lug, the bottom end surface of rear axle pipe is connected with fixed bolster, and fixed bolster is connected with supporting arm, and the front end of supporting arm is provided with front fixed axle, and front fixed axle is connected with frame, the utility model has the advantages of simple structure, good damping effect, alleviates the fatigue of the person who rides, makes the person who rides more comfortable, and increases the service life of electric tricycle.

Description

Technical Field

[0001] This utility model relates to the field of electric tricycle technology, and more specifically to a rear axle shock absorption system for tricycles. Background Technology

[0002] Electric tricycles are three-wheeled transportation vehicles powered by batteries and driven by motors for hauling goods or people. They are characterized by being environmentally friendly and pollution-free, having low operating costs, being flexible and convenient to operate, and having a moderate load-bearing capacity. They are widely used in short-distance transportation fields such as family travel, cargo transportation, and factory operations.

[0003] However, existing electric tricycles still have certain shortcomings in their structural design. The frame structure is simple, and the shock absorption system is also rudimentary. This rudimentary shock absorption system is insufficient to effectively absorb the impact forces from the road surface during vehicle operation. This results in severe vertical vibrations and lateral swaying when driving on bumpy roads, uneven sections, or over obstacles, causing a very noticeable jolt. This not only seriously affects the comfort of passengers, easily leading to fatigue during prolonged driving, but may even compromise driving safety. Furthermore, the continuous and severe vibrations cause frequent impact damage to core components such as the frame, motor, rear axle, and gearbox, accelerating wear, aging, and deformation of these parts, shortening the overall lifespan of the electric tricycle, and increasing maintenance and operating costs for users.

[0004] Therefore, there is an urgent need for a shock absorption system for the rear axle of a tricycle. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a rear axle shock absorption system for a tricycle, so as to solve the problems in the background art.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows.

[0007] A rear axle shock absorption system for a three-wheeled vehicle is disposed between the rear axle tube and the frame, including a pair of shock-absorbing springs vertically disposed between the rear axle tube and the frame; a gearbox is disposed in the middle of the rear axle tube, and a horizontally disposed rotating shaft is connected to the front end of the gearbox, which is perpendicular to the rear axle tube; a horizontally disposed balance link is connected to the rotating shaft, which can rotate around the rotating shaft; both ends of the balance link are connected to spring dampers that are inclined outward, and the other end of the spring dampers is connected to the frame; both ends of the upper end face of the rear axle tube are connected to arc-shaped leaf springs that extend in the front-rear direction, and both ends of the leaf springs are connected to lugs for connecting to the frame; a fixed bracket is connected to the bottom end face of the rear axle tube below the leaf springs, and the fixed bracket is connected to an arc-shaped support arm connected to the frame; a front fixed shaft is disposed at the front end of the support arm, and the front fixed shaft is connected to the frame.

[0008] To further optimize the technical solution, spring seats are connected to both ends of the shock absorber spring. The spring seat at the top of the shock absorber spring is connected to the crossbeam in the middle of the frame, and the spring seat at the bottom of the shock absorber spring is connected to the rear axle tube.

[0009] To further optimize the technical solution, the spring damper is connected to the vehicle frame via a hinged seat.

[0010] To further optimize the technical solution, the middle part of the leaf spring is connected to the rear axle tube at a low position and both ends are high, and a horizontally arranged connecting piece is provided on the upper end surface of the middle part of the leaf spring; a pair of U-bolts that are locked onto the rear axle tube are provided on the connecting piece, and the nuts of the U-bolts are tightened above the connecting piece.

[0011] To further optimize the technical solution, a mounting bracket is provided between the leaf spring and the rear axle tube.

[0012] To further optimize the technical solution, the lug includes a hinge seat connected to the vehicle frame. Both ends of the hinge seat's pivot extend out of the hinge seat body and are connected to a double-rounded rectangular plate. The other end of the double-rounded rectangular plate is connected to the connecting hole at the end of the leaf spring via a pivot pin.

[0013] Due to the adoption of the above technical solutions, the technological progress achieved by this utility model is as follows.

[0014] This utility model provides a rear axle shock absorption system for a tricycle. The rear axle is tightly connected to the frame via a support arm and leaf springs. The leaf springs themselves have shock absorption functions, and the shock-absorbing springs between the rear axle and the frame increase the comfort of the vehicle when traversing bumpy roads, enhancing the shock absorption effect. Utilizing the inherent characteristics of spring dampers, a pair of spring dampers are installed to absorb excess bouncing of the vehicle body. Through the rotation shaft of the rear axle, the two spring dampers exert mutual force to counteract the excess bouncing generated by the added shock absorption system, increasing the comfort of the vehicle when traversing bumpy roads. This utility model has the advantages of simple structure, good shock absorption effect, reduced passenger fatigue, increased passenger comfort, and extended service life of the electric tricycle. Attached Figure Description

[0015] Figure 1 This is a structural diagram of the present invention when connecting the vehicle frame; Figure 2 This is a structural schematic diagram of the present invention when connecting the vehicle frame from another angle; Figure 3 This is a bottom view of the vehicle frame when the present invention is connected; Figure 4 This is a schematic diagram of the structure of this utility model.

[0016] The components are: 1. Frame, 2. Shock absorber spring, 3. Spring damper, 4. Leaf spring, 41. Mounting bracket, 5. Hanger lug, 6. Connecting plate, 7. Support arm, 71. Front fixed shaft, 72. Fixed bracket, 8. Rotary shaft, 9. Rear axle tube, 11. Gearbox, 12. Balance link. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0018] A rear axle shock absorption system for a tricycle is installed between the rear axle tube 9 and the frame 1, combined with... Figures 1 to 4 As shown, it includes a frame 1, shock absorber spring 2, spring damper 3, leaf spring 4, mounting bracket 41, hanger lug 5, connecting piece 6, support arm 7, front fixed shaft 71, fixed bracket 72, rotating shaft 8, rear axle tube 9, gearbox 11, and balance link 12.

[0019] A pair of shock absorber springs 2 are vertically installed between the rear axle tube 9 and the frame 1. These springs are high-strength compression springs with excellent elastic recovery and fatigue resistance, capable of quickly absorbing vertical impact forces generated during vehicle operation. Both ends of the shock absorber springs 2 are connected to structurally matched spring seats made of high-strength wear-resistant alloy material with rust-proof treatment. The spring seat at the top of the shock absorber spring 2 connects to the crossbeam in the middle of the frame 1, while the spring seat at the bottom of the shock absorber spring 2 connects to the rear axle tube 9.

[0020] A gearbox 11 is located in the middle of the rear axle tube 9. A horizontally arranged rotating shaft 8 is connected to the front end of the gearbox 11. The rotating shaft 8 is perpendicular to the extension direction of the rear axle tube 9. A horizontally arranged balance rod 12 is connected to the rotating shaft 8 and can rotate around the rotating shaft 8. Spring dampers 3 are connected to both ends of the balance rod 12. The spring dampers 3 are inclined outwards, and the other end of the spring dampers 3 is connected to the frame 1 through a hinge seat.

[0021] Leaf springs 4 are connected to both ends of the upper surface of the rear axle tube 9. Leaf springs 4 extend in the front-rear direction, and their projection is perpendicular to the rear axle tube 9. Leaf springs 4 are arc-shaped, with a low connection point to the rear axle tube 9 and higher ends. This structural design gives leaf springs 4 stronger elastic damping capabilities. Leaf springs 4 are arc-shaped plates composed of four sets of stacked arc-shaped plates of different lengths. The uppermost arc-shaped plate is longer, and the lowermost arc-shaped plates gradually become shorter. The stacked leaf springs 4 exhibit excellent overall elasticity, effectively absorbing vibrations from both the front-rear and vertical directions.

[0022] The middle part of the leaf spring 4 is connected to the rear axle tube 9, and a mounting bracket 41 is provided between the leaf spring 4 and the rear axle tube 9. The mounting bracket 41 is made of elastic wear-resistant material. Its lower end is fixedly connected to the rear axle tube 9, and its upper end is in contact with the lower end surface of the leaf spring 4, which plays the role of buffering, positioning and protecting the leaf spring 4.

[0023] A horizontally positioned connecting piece 6 is provided on the upper surface of the middle part of the leaf spring 4. The connecting piece 6 is rectangular, and a pair of parallel U-bolts pass through it. The U-bolts are secured to the outside of the rear axle tube 9. After the threaded part of the U-bolt passes through the connecting piece 6, it is tightened above the connecting piece 6 by a nut, thus firmly fixing the leaf spring 4 to the rear axle tube 9. A flat washer and a spring washer are provided between the nut and the connecting piece 6 to ensure the stability of the connection and prevent loosening.

[0024] Both ends of the leaf spring 4 are connected to lugs 5, which are used to connect the leaf spring 4 to the frame 1. Each lug 5 includes a hinge seat connected to the frame 1. Both ends of the hinge seat's pivot extend beyond the hinge seat body and are connected to double-rounded rectangular plates. The double-rounded rectangular plates have shaft holes, through which a pin passes and connects to the connecting holes at the ends of the leaf spring 4. Anti-detachment caps are provided at both ends of the pin to ensure the stability and flexibility of the hinge structure.

[0025] A fixed bracket 72 is connected to the bottom end of the rear axle tube 9 located below the leaf spring 4. The fixed bracket 72 is connected to an arc-shaped support arm 7 that is connected to the frame 1. A front fixed shaft 71 is provided at the front end of the support arm 7, and the front fixed shaft 71 of the support arm 7 is connected to the frame 1.

[0026] This invention tightly connects the rear axle to the frame 1 via the support arm 7 and the leaf spring 4. The leaf spring 4 itself has a shock absorption function, and the shock-absorbing spring 2 between the rear axle and the frame 1 increases the comfort of the vehicle body when passing over bumpy roads and enhances the shock absorption effect. Utilizing the inherent characteristics of the spring damper 3, a pair of spring dampers 3 are set up to absorb excess bouncing of the vehicle body; through the rotation shaft 8 of the rear axle, the two spring dampers 3 act against each other, offsetting the excess bouncing generated by the increased shock absorption system, thus increasing the comfort of the vehicle when passing over bumpy roads.

[0027] When the vehicle is traveling on a bumpy road, the shock absorber springs 2 and leaf springs 4 are compressed as the vehicle body sways from side to side, initially buffering and absorbing most of the impact force. When the right side frame 1 moves downward, it drives the right side spring damper 3 to press down to the left. At the same time, it rotates through the rotating shaft 8 connected to the rear axle, causing the left side spring damper 3 to move in the upper left direction. Due to the characteristics of the spring damper 3 itself, the spring generates a reverse force to provide force feedback in the opposite direction. Under the mutual force of the two spring dampers 3, part of the vehicle rebound is absorbed, effectively suppressing excessive vibration and sway of the vehicle body, making the vehicle more stable when traveling on bumpy roads.

Claims

1. A rear axle shock absorption system for a tricycle, disposed between the rear axle tube (9) and the frame (1), characterized in that: The system includes a pair of shock-absorbing springs (2) vertically positioned between the rear axle tube (9) and the frame (1); a gearbox (11) is located in the middle of the rear axle tube (9), and a horizontally positioned rotating shaft (8) perpendicular to the rear axle tube (9) is connected to the front end of the gearbox (11). A horizontally positioned balance link (12) is connected to the rotating shaft (8) and can rotate around the rotating shaft (8); both ends of the balance link (12) are connected to spring dampers (3) inclined outwards, and the other end of the spring dampers (3) is connected to... The frame (1) is connected; both ends of the upper surface of the rear axle tube (9) are connected to an arc-shaped leaf spring (4) extending in the front and rear directions, and both ends of the leaf spring (4) are connected to a lug (5) for connecting with the frame (1); the bottom surface of the rear axle tube (9) located below the leaf spring (4) is connected to a fixed bracket (72), and the fixed bracket (72) is connected to an arc-shaped support arm (7) connected with the frame (1); the front end of the support arm (7) is provided with a front fixed shaft (71), and the front fixed shaft (71) is connected to the frame (1).

2. The rear axle shock absorption system for a tricycle according to claim 1, characterized in that: Both ends of the shock absorber spring (2) are connected to spring seats. The spring seat at the top of the shock absorber spring (2) is connected to the crossbeam in the middle of the frame (1), and the spring seat at the bottom of the shock absorber spring (2) is connected to the rear axle tube (9).

3. The rear axle shock absorption system for a tricycle according to claim 1, characterized in that: The spring damper (3) is connected to the frame (1) via a hinge seat.

4. The rear axle shock absorption system for a tricycle according to claim 1, characterized in that: The leaf spring (4) is connected to the rear axle tube (9) at a low position and at both ends high. A horizontally arranged connecting piece is provided on the upper end face of the leaf spring (4). A pair of U-bolts that are locked onto the rear axle tube (9) are provided on the connecting piece (6). The nuts of the U-bolts are tightened above the connecting piece (6).

5. A rear axle shock absorption system for a tricycle according to claim 4, characterized in that: A mounting bracket (41) is provided between the leaf spring (4) and the rear axle tube (9).

6. The rear axle shock absorption system for a tricycle according to claim 1, characterized in that: The lug (5) includes a hinge seat connected to the frame (1). Both ends of the hinge seat's pivot extend out of the hinge seat body and are connected to a double round-headed rectangular plate. The other end of the double round-headed rectangular plate is connected to the connecting hole at the end of the leaf spring (4) through a pivot pin.

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