Plate spring damping structure

Abstract

The utility model provides a plate spring damping structure which comprises a plate spring body and an auxiliary damping assembly arranged above the plate spring body. The auxiliary damping assembly comprises a set of piston cylinders arranged on the plate spring body, piston rods connected to the piston cylinders in a sliding mode, piston plates arranged in the piston cylinders and connected with the piston rods, and pressure relief structures arranged on the piston cylinders. Through the arranged auxiliary damping assembly, when the vehicle frame encounters small vibration force, the vibration force can be directly buffered and absorbed, when the vehicle frame encounters large vibration force, the remaining vibration force can be transmitted to the plate spring body, and damping is conducted on the vehicle frame through the elastic restoring force of the plate spring body; the number of times that the plate spring body continuously bears vibration can be further reduced, so that internal fatigue damage of the plate spring body is effectively reduced, and the service life of the plate spring body can be prolonged.

Description

Technical Field

[0001] This utility model relates to the field of electric tricycle technology, and in particular to a leaf spring shock absorption structure. Background Technology

[0002] Electric tricycles, with their high flexibility, maneuverability, and cargo capacity, have become an indispensable means of transportation for logistics, short-distance goods delivery, and agricultural production. The performance of their shock absorption system directly determines the vehicle's driving stability under complex road conditions, the safety and reliability of cargo transportation, and the driver's riding comfort. Leaf springs, as an important shock absorption component of tricycles, are installed between the rear axle and the frame of electric tricycles to better achieve load-bearing and shock absorption functions.

[0003] Currently, electric tricycles rely solely on the elastic deformation of the leaf springs themselves to absorb and buffer vibration energy. During the operation of an electric tricycle, vibrations of varying magnitudes generated by the frame will act on the leaf springs. The leaf springs continuously bear random vibration loads from the road surface and constant stresses caused by the vehicle's own weight. Over time, this can lead to fatigue damage within the leaf spring material, gradually producing micro-cracks, which will severely shorten its service life. To address this, we have provided a leaf spring damping structure. Utility Model Content

[0004] This utility model provides a leaf spring shock absorption structure. When the vehicle frame experiences small vibrations during driving, the leaf spring is not needed for buffering and absorption, further reducing the number of times the leaf spring continuously bears vibrations. When the vibration force is large, the vibration force can be transmitted to the leaf spring to ensure the shock absorption effect, thereby effectively reducing internal fatigue damage to the leaf spring and extending its service life.

[0005] The purpose and effect of this utility model's leaf spring damping structure are achieved by the following specific technical means: A leaf spring damping structure includes a leaf spring body, and further includes:

[0006] The auxiliary damping assembly is located above the leaf spring body and includes a set of piston cylinders on the leaf spring body, a piston rod slidably connected to each piston cylinder, a piston plate located inside each piston cylinder and connected to the piston rod, and a pressure relief structure located on each piston cylinder.

[0007] Preferably, the leaf spring body is composed of multiple leaf springs, which are stacked in sequence and fastened together by rivets and bolts.

[0008] Preferably, a return spring is fixedly connected to the inner bottom wall of each piston cylinder, and the other end of each return spring is connected to the bottom surface of the piston plate.

[0009] Preferably, a set of support blocks are rotatably connected to the outer surface of each piston cylinder, and the bottom end of each support block is connected to the upper surface of the leaf spring body.

[0010] Preferably, a set of connecting shafts is fixedly connected to the outer surface of each piston rod, and a vertical plate is rotatably connected to the ends of each set of connecting shafts that are far apart from each other. A fixed seat is fixedly connected to the top of each set of vertical plates.

[0011] Preferably, the pressure relief structure of the auxiliary shock absorption assembly includes an exhaust pipe connected to each piston cylinder, a sealing plate hinged to the inner wall of each exhaust pipe, a retaining spring fixedly connected to one side of each sealing plate, and the other end of each retaining spring connected to the inner wall of the exhaust pipe.

[0012] Preferably, a limiting block is fixedly connected to the inner wall of each exhaust pipe, and one side of each limiting block is in contact with the other side of the sealing plate.

[0013] Preferably, each of the exhaust pipes is provided with a filter cover at the other end, and the filter cover is detachable from the exhaust pipe.

[0014] Preferably, a blocking block is fixedly connected to the outer surface of each piston cylinder.

[0015] Preferably, the inner wall of the piston cylinder is provided with a self-lubricating coating, and the self-lubricating coating is a polytetrafluoroethylene coating.

[0016] Beneficial effects:

[0017] 1. Through the auxiliary shock absorption components, when the frame encounters a small vibration, it can directly buffer and absorb the vibration. When it encounters a large vibration, it will transfer the remaining vibration to the leaf spring body. The elastic restoring force of the leaf spring body will dampen the frame. It can further reduce the number of times the leaf spring body is subjected to continuous vibration, thereby effectively reducing the internal fatigue damage of the leaf spring body and thus improving the service life of the leaf spring body.

[0018] 2. The filter cover can filter the exhaust pipe to prevent impurities from entering the piston cylinder from the exhaust pipe. The blocking block can block the piston cylinder to prevent collision damage between the piston cylinder and the leaf spring body. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model.

[0020] Figure 2 This is a three-dimensional structural diagram of the auxiliary shock absorption component of this utility model.

[0021] Figure 3This is a three-dimensional structural schematic diagram of the piston cylinder of this utility model, shown in a cross-sectional view.

[0022] Figure 4 This is an exploded structural diagram of the piston plate of this utility model.

[0023] Figure 5 This is a three-dimensional structural diagram of the fixing base of this utility model.

[0024] Figure 6 This is a three-dimensional structural schematic diagram of the exhaust pipe of this utility model, which is a cross-sectional view.

[0025] Figure 1-6 In the diagram, the correspondence between component names and drawing numbers is as follows:

[0026] 1. Leaf spring body; 2. Auxiliary damping assembly; 201. Piston cylinder; 202. Piston rod; 203. Piston plate; 204. Return spring; 205. Support block; 206. Connecting shaft; 207. Vertical plate; 208. Fixing seat; 209. Exhaust pipe; 210. Sealing plate; 211. Supporting spring; 212. Limiting block; 213. Filter cover; 214. Blocking block. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0028] First Embodiment

[0029] As attached Figure 1 As shown: A leaf spring damping structure includes a leaf spring body 1, which is composed of multiple leaf springs. The multiple leaf springs are stacked in sequence and connected by rivets and bolts in an alternating manner. The rivets are made of high-strength aluminum alloy. One end of the rivet is embedded into a pre-made hole in the upper leaf spring through a precision cold forging process, and the other end is formed by hot riveting at the corresponding position in the lower leaf spring, so that the rivet and the two layers of leaf springs are tightly engaged, effectively preventing relative displacement between the leaf springs in the horizontal direction. The bolts are made of alloy steel, and their screw parts penetrate through the reserved through holes of the multi-layer leaf springs. By tightening the nuts, the axial tension of the bolts is used to make the leaf springs fit tightly in the vertical direction. The rivets and bolts are distributed in an alternating manner, which can not only ensure the strength of the connection, but also evenly distribute the stress borne by the leaf springs during operation. This alternating fastening connection method greatly enhances the overall stability and structural strength of the leaf spring body 1, so that it can still reliably perform the damping function under the long-term action of complex and variable external forces.

[0030] Second Embodiment

[0031] As attached Figure 1 To be continued Figure 6 As shown: The auxiliary damping assembly 2 is located above the leaf spring body 1. It includes a set of piston cylinders 201 mounted on the leaf spring body 1, piston rods 202 slidably connected to each piston cylinder 201, and piston plates 203 located inside each piston cylinder 201 and connected to the piston rods 202. A set of support blocks 205 are rotatably connected to the outer surface of each piston cylinder 201. The bottom end of each support block 205 is connected to the upper surface of the leaf spring body 1. The support blocks 205 can connect the piston cylinders 201 and the leaf spring body 1. A set of connecting shafts 206 are fixedly connected to the outer surface of each piston rod 202. A vertical plate 207 is rotatably connected to the opposite end of each set of connecting shafts 206. A fixed seat 208 is fixedly connected to the top of each set of vertical plates 207. The piston rods 202 can be connected to the frame by the cooperation of the connecting shafts 206, the vertical plates 207, and the fixed seats 208. When the frame vibrates, it will apply pressure to the fixed seats 208. The downward pressing force causes the fixed seat 208 to move downward, which in turn drives the piston rod 202 to move synchronously. The piston rod 202 then pushes the piston plate 203 to slide inside the piston cylinder 201. During the downward movement of the piston plate 203, it compresses the air inside the piston cylinder 201. When the tricycle encounters a small vibration, the downward movement of the piston plate 203 will cause the air pressure inside the piston cylinder 201 to increase rapidly. This increased pressure will form a reverse buffering force, effectively buffering and absorbing the vibration. The inner wall of the piston cylinder 201 is provided with a self-lubricating coating, which is a polytetrafluoroethylene coating. This can reduce the friction when the piston plate 203 slides inside the piston cylinder 201, reduce wear, and improve the working stability and service life of the auxiliary shock absorption component 2. Each piston cylinder 201 has a blocking block 214 fixedly connected to its outer surface. The blocking block 214 can prevent collision damage between the piston cylinder 201 and the leaf spring body 1.

[0032] The pressure relief structure of the auxiliary shock absorption assembly 2, provided on each piston cylinder 201, includes an exhaust pipe 209 connected to each piston cylinder 201. A sealing plate 210 is hinged to the inner wall of each exhaust pipe 209. A retaining spring 211 is fixedly connected to one side of each sealing plate 210, and the other end of each retaining spring 211 is connected to the inner wall of the exhaust pipe 209. When the tricycle encounters a large vibration, the piston plate 203 moves rapidly downward within the piston cylinder 201, causing a sharp increase in pressure between the piston plate 203 and the piston cylinder 201. When this pressure exceeds the supporting force of the retaining spring 211 on the sealing plate 210, it will push the sealing plate 210 to deflect, opening the exhaust pipe 209. Compressed air is discharged from the piston cylinder 201 through the exhaust pipe 209. As the air is discharged, the piston plate 203 continues to descend until it reaches the bottom of the piston cylinder 201. Once the piston plate 203 reaches the bottom of the piston cylinder 201, the piston cylinder 201 transmits the remaining vibration force to the leaf spring body 1. The leaf spring body 1 undergoes elastic deformation and dampens the frame through its own elastic restoring force. This further reduces the number of times the leaf spring body 1 is subjected to continuous vibration, thereby effectively reducing internal fatigue damage to the leaf spring body 1 and extending its service life. Each exhaust pipe 209 has a limit block 212 fixedly connected to its inner wall, and one side of each limit block 212 is in contact with the other side of the sealing plate 210. The limiting block 212 prevents the retaining spring 211 from pushing the sealing plate 210 to an excessive deflection angle, ensuring its sealing effect on the exhaust pipe 209. Each exhaust pipe 209 has a filter cover 213 at its other end, and the filter cover 213 is detachable from the exhaust pipe 209. The filter cover 213 filters one end of the exhaust pipe 209, preventing impurities from entering the piston cylinder 201. A return spring 204 is fixedly connected to the inner bottom wall of each piston cylinder 201, and the other end of each return spring 204 is connected to the bottom surface of the piston plate 203. When the piston plate 203 descends, it compresses the return spring 204. When the exhaust pipe 209 is sealed, the return spring 204, under continuous pressure, maintains its upward pushing force on the piston plate 203. The pushing force is generated by the continuous compression of the air inside the piston cylinder 201 by the piston plate 203, causing the air pressure inside the piston cylinder 201 to rise continuously and form a strong downward pressure. At this time, the return spring 204, with its own elastic restoring force, counteracts the downward pressure generated by the compressed air inside the piston cylinder 201, keeping the piston plate 203 in a relatively stable position, thereby further improving the buffering and balancing effect during the shock absorption process. When the exhaust pipe 209 exhausts, the high-pressure air inside the piston cylinder 201 is quickly discharged, and the air pressure inside the piston cylinder 201 drops sharply. After transmitting the vibration force to the leaf spring body 1, the external pressure on the originally compressed return spring 204 is instantly and significantly reduced. Driven by its stored elastic potential energy, the spring quickly returns to its original length.The rapid rebound of the return spring 204 causes the piston plate 203 to move upward, returning it to near its initial position, preparing it for the next possible vibration damping.

[0033] Working principle: First, the leaf spring body 1 is installed between the rear axle and the frame of the tricycle. At the same time, the fixing seat 208 is securely connected to the frame. When the tricycle vibrates during operation, the frame will displace and vibrate accordingly. The frame will apply a downward holding force to the fixing seat 208. The downward movement of the fixing seat 208 will drive the piston rod 202 to move synchronously. The piston rod 202 will then push the piston plate 203 to slide inside the piston cylinder 201. During the downward movement of the piston plate 203, it will compress the air inside the piston cylinder 201. When the tricycle encounters a small vibration, the downward movement of the piston plate 203 will cause the air pressure inside the piston cylinder 201 to increase rapidly. This increased pressure will form a reverse buffering force. At the same time, when the piston plate 203 descends, it will compress the return spring 204. The return spring 204 will also absorb a small part of the vibration force, effectively buffering and absorbing the vibration force, thereby reducing the vibration transmitted from the frame to the rider and improving riding comfort.

[0034] When the tricycle encounters a large vibration, the piston plate 203 moves rapidly downward inside the piston cylinder 201, causing a sharp increase in pressure between the piston plate 203 and the piston cylinder 201. When this pressure exceeds the supporting force of the retaining spring 211 on the sealing plate 210, it will push the sealing plate 210 to deflect. The deflection of the sealing plate 210 opens the passage of the exhaust pipe 209, and compressed air will be discharged from the piston cylinder 201 through the exhaust pipe 209. As the air is discharged, the piston plate 203 will continue to descend until it reaches the bottom of the piston cylinder 201. Once the piston plate 203 descends to the bottom of the piston cylinder 201, the piston cylinder 201 will transmit the remaining vibration force to the leaf spring body 1. The leaf spring body 1 will undergo elastic deformation and dampen the frame through its own elastic restoring force. It can further reduce the number of times the leaf spring body 1 is continuously subjected to vibration, thereby effectively reducing the internal fatigue damage of the leaf spring body 1 and improving the service life of the leaf spring body 1.

Claims

1. A leaf spring damping structure, comprising a leaf spring body (1), characterized in that, Also includes: The auxiliary damping assembly (2) is located above the leaf spring body (1) and includes a set of piston cylinders (201) on the leaf spring body (1), a piston rod (202) slidably connected to each piston cylinder (201), a piston plate (203) located inside each piston cylinder (201) and connected to the piston rod (202), and a pressure relief structure located on each piston cylinder (201).

2. The leaf spring damping structure according to claim 1, characterized in that: The leaf spring body (1) is composed of multiple leaf springs, which are stacked in sequence and fastened together by rivets and bolts.

3. The leaf spring damping structure according to claim 1, characterized in that: Each piston cylinder (201) has a return spring (204) fixedly connected to its inner bottom wall, and the other end of each return spring (204) is connected to the bottom surface of the piston plate (203).

4. The leaf spring damping structure according to claim 1, characterized in that: Each piston cylinder (201) has a set of support blocks (205) rotatably connected to its outer surface, and the bottom end of each support block (205) is connected to the upper surface of the leaf spring body (1).

5. The leaf spring damping structure according to claim 1, characterized in that: Each piston rod (202) has a set of connecting shafts (206) fixedly connected to its outer surface. Each set of connecting shafts (206) has a vertical plate (207) rotatably connected to one end of each set of connecting shafts (206) that is far apart from each other. Each set of vertical plates (207) has a fixed seat (208) fixedly connected to its top end.

6. The leaf spring damping structure according to claim 1, characterized in that: The pressure relief structure of the auxiliary shock absorption assembly (2) includes an exhaust pipe (209) connected to each piston cylinder (201), and a sealing plate (210) is hinged to the inner wall of each exhaust pipe (209). A retaining spring (211) is fixedly connected to one side of each sealing plate (210), and the other end of each retaining spring (211) is connected to the inner wall of the exhaust pipe (209).

7. The leaf spring damping structure according to claim 6, characterized in that: Each of the exhaust pipes (209) has a limiting block (212) fixedly connected to its inner wall, and one side of each limiting block (212) is in contact with the other side of the sealing plate (210).

8. The leaf spring damping structure according to claim 6, characterized in that: Each of the exhaust pipes (209) is provided with a filter cover (213) at the other end, and the filter cover (213) is detachable from the exhaust pipe (209).

9. The leaf spring damping structure according to claim 1, characterized in that: Each piston cylinder (201) has a blocking block (214) fixedly connected to its outer surface.

10. The leaf spring damping structure according to claim 1, characterized in that: The inner wall of the piston cylinder (201) is provided with a self-lubricating coating, and the self-lubricating coating is a polytetrafluoroethylene coating.

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