Double-spring shock absorber

Abstract

The utility model discloses a double-spring shock absorber which comprises an oil storage cylinder, a bottom cover is arranged at the bottom of the oil storage cylinder, a sealing bolt is arranged on the inner side of the middle of the bottom cover, the end of the sealing bolt is connected with a first hanging ring, a rubber bushing is arranged on the inner side of the first hanging ring, and a floating piston is arranged on the inner side of the lower portion of the oil storage cylinder. A first guide belt is arranged on the circumferential face of the floating piston, a mounting groove is formed in the circumferential face of the floating piston, a first O-shaped ring is arranged between the mounting groove and the oil storage cylinder, a lower spring seat is arranged on the circumferential face of the oil storage cylinder through a first check ring, a lower buffering seat is arranged on the inner side of the lower spring seat, and an anti-collision cover is arranged at the end of the oil storage cylinder. According to the shock absorption device, the functions of guaranteeing kinetic energy recovery and improving the shock absorption efficiency are achieved.

Description

Technical Field

[0001] The application of the utility model relates to the technical field of shock absorbers, specifically a double-spring shock absorber. Background Art

[0002] In a common suspension system, a single mechanical spring is generally adopted. The traditional spring shock absorber mainly absorbs and releases energy through the elastic deformation of the spring. When subjected to an external excitation, the spring will undergo compression or tensile deformation to absorb energy. When the external excitation disappears, the spring will return to its original state and release the absorbed energy, thereby reducing mechanical vibration and impact. However, the spring cannot store its energy and will inevitably rebound and deform to release energy. The stiffness of the mechanical spring and the elastic energy of shock absorption are fixed, and the spring rebounds instantaneously. When the driving road conditions are different, affected by the characteristics and structure of the spring itself, the shock absorption effect of the shock absorber cannot reach the ideal requirement, thus affecting the comfort of driving and riding.

[0003] Therefore, designing a shock absorber that can ensure kinetic energy recovery and improve shock absorption efficiency is exactly the problem to be solved by the inventor. Summary of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide a double-spring shock absorber, which can realize the functions of ensuring kinetic energy recovery and improving shock absorption efficiency.

[0005] The technical solution adopted by the device of the utility model is as follows: a double-spring shock absorber, which includes an oil storage cylinder, a bottom cover is arranged at the bottom of the oil storage cylinder, a sealing bolt is arranged on the inner side of the middle of the bottom cover, a first suspension ring is connected to the end of the sealing bolt, a rubber bushing is arranged on the inner side of the first suspension ring, a floating piston is arranged on the inner side of the lower part of the oil storage cylinder, a first guide band is arranged on the circumferential surface of the floating piston, an installation groove is formed on the circumferential surface of the floating piston, a first O-ring is arranged between the installation groove and the oil storage cylinder, a lower spring seat is arranged on the circumferential surface of the oil storage cylinder through a first retaining ring, a lower buffer seat is arranged on the inner side of the lower spring seat, a collision-proof cover is arranged at the end of the oil storage cylinder, a piston rod is hermetically and slidably arranged in the middle of the collision-proof cover, a recovery valve assembly is connected to the outer side of the lower end of the piston rod, a limit seat is arranged on the outer side of the lower part of the piston rod, a first buffer block is arranged on the side surface of the limit seat, a sliding assembly is arranged on the outer side of the first buffer block and on the outer side of the piston rod, a second suspension ring is connected to the outer side of the upper end of the piston rod, a first dust cover is arranged on the outer side of the upper part of the piston rod, a support ring is arranged on the inner side wall of the first dust cover, an inner buffer block is arranged on the inner side of the support ring and on the outer side of the piston rod, a retaining ring is arranged on the outer side of the upper end of the piston rod and below the second suspension ring, an independent air tank structure is arranged on the outer side of the retaining ring through a second O-ring and a third O-ring, an upper spring seat is arranged below the independent air tank structure and on the outer side of the first dust cover, an upper buffer seat is arranged on the inner side of the upper spring seat, and a first spring is arranged between the upper buffer seat and the lower buffer seat and on the outer side of the first dust cover.

[0006] Further, the independent air tank structure includes an upper cylinder cover and a lower cylinder cover. The upper cylinder cover is connected to the bottom of the second suspension ring. An upper spring fixing seat is arranged on the inner top of the upper cylinder cover. The lower cylinder cover is slidably arranged on the inner side of the upper cylinder cover. A groove is formed on the end surface of the lower cylinder cover, and a lower spring fixing seat is arranged on the inner side of the groove. A disc spring is arranged between the upper spring fixing seat and the lower spring fixing seat. A second buffer block is arranged on the inner side of the upper end of the lower cylinder cover. A through hole is formed in the upper end of the lower cylinder cover, and a second X-ring is arranged on the inner side wall of the through hole. A second gasket is arranged below the second X-ring. A third guide band is arranged on the upper part of the outer side wall of the lower cylinder cover. A first X-ring is arranged on the circumferential surface of the lower cylinder cover. A first gasket is arranged below the first X-ring. A third retaining ring is arranged on the lower part of the inner side wall of the upper cylinder cover. A buffer pad is arranged between the third retaining ring and the lower cylinder cover. A second guide band is arranged on the circumferential surface of the lower cylinder cover and between the buffer pad and the first gasket.

[0007] Further, the through hole formed in the upper end of the lower cylinder cover is in plug-in and sliding fit with the piston rod.

[0008] Further, a connection joint is provided at the end of the upper cylinder cover, and a pressure maintaining valve assembly is arranged inside the connection joint.

[0009] Further, a second dust cover is arranged on the outer side of the upper cylinder cover.

[0010] Further, a semi-circular annular groove recessed inward is arranged on the inner side of the lower part of the inner buffer block.

[0011] Further, the lower end of the first dust cover is arranged on the outer side of the upper end of the oil storage cylinder and is in sliding fit.

[0012] Further, the lower end of the second dust cover is arranged on the outer side of the upper spring seat.

[0013] The beneficial effects of the device of the present utility model are as follows:

[0014] 1. Due to the structural design of the double-spring structure and the external independent air tank of the present utility model, it is deduced from the working principle that the double springs are used to relieve the impact, absorb and release energy, realizing the functions of ensuring kinetic energy recovery and improving the shock absorption efficiency. Description of the Drawings

[0015] Figure 1 is the structural view of the present utility model.

[0016] Figure 2 is the sectional view of the present utility model.

[0017] Figure 3 is the structural view of the independent air tank of the present utility model.

[0018] Description of the Reference Numerals: 1 - First lifting ring; 2 - Rubber bushing; 3 - Sealing bolt; 4 - Bottom cover; 5 - Oil storage cylinder; 6 - Floating piston; 7 - First O-ring; 8 - First guide band; 9 - First retaining ring; 10 - Lower spring seat; 11 - Lower buffer seat; 12 - First spring; 13 - Second retaining ring; 14 - Recovery valve assembly; 15 - Limit seat; 16 - First buffer block; 17 - Sliding assembly; 18 - Anti-collision cover; 19 - Piston rod; 20 - First dust cover; 21 - Inner buffer block; 22 - Support ring; 23 - Upper spring seat; 24 - Upper buffer seat; 25 - Second dust cover; 26 - Second O-ring; 27 - Retaining ring; 28 - Third O-ring; 29 - Second lifting ring; 30 - Pressure maintaining valve assembly; 201 - Third retaining ring; 202 - Buffer pad; 203 - Second guide band; 204 - Upper cylinder cover; 205 - First gasket; 206 - First X-ring; 207 - Lower spring fixing seat; 208 - Disc spring; 209 - Third guide band; 210 - Lower cylinder cover; 211 - Upper spring fixing seat; 212 - Second gasket; 213 - Second X-ring; 214 - Second buffer block. Detailed Embodiments

[0019] The following will further elaborate on the device of the present utility model in conjunction with specific embodiments. These embodiments are only used to illustrate the present utility model and not to limit the scope of the present utility model. In addition, it should be understood that after reading the content taught by the device of the present utility model, those skilled in the art can make various changes or modifications to the present utility model, and these equivalent forms also fall within the scope defined by the appended claims of the application.

[0020] Embodiment 1: Refer to Figures 1 to 3 It is the structural view, sectional view, and independent air tank structural view of the present utility model. A double-spring shock absorber includes an oil storage cylinder 5. A bottom cover 4 is provided at the bottom of the oil storage cylinder 5. A sealing bolt 3 is provided inside the middle of the bottom cover 4. One end of the sealing bolt 3 is connected to a first suspension ring 1. A rubber bushing 2 is provided inside the first suspension ring 1 to reduce collision and lower frictional damage. A floating piston 6 is provided inside the lower part of the oil storage cylinder 5. A first guide band 8 is provided on the circumferential surface of the floating piston 6. An installation groove is provided on the circumferential surface of the floating piston 6. A first O-ring 7 is provided between the installation groove and the oil storage cylinder 5. A lower spring seat 10 is provided on the circumferential surface of the oil storage cylinder 5 through a first retaining ring 9. A lower buffer seat 11 is provided inside the lower spring seat 10. An anti-collision cover 18 is provided at the end of the oil storage cylinder 5. A piston rod 19 is hermetically and slidably provided in the middle of the anti-collision cover 18. A recovery valve assembly 14 is connected to the outer side of the lower end of the piston rod 19. A hole is provided on the recovery valve assembly 14 for the circulation of hydraulic oil. A limit seat 15 is provided on the outer side of the lower part of the piston rod 19. A first buffer block 16 is provided on the side of the limit seat 15. A sliding assembly 17 is provided on the outer side of the first buffer block 16 and the outer side of the piston rod 19. A second suspension ring 29 is connected to the outer side of the upper end of the piston rod 19. A first dust cover 20 is provided on the outer side of the upper part of the piston rod 19. The lower end of the first dust cover 20 is provided on the outer side of the upper end of the oil storage cylinder 5 and is in sliding fit to reduce dust accumulation. A support ring 22 is provided on the inner side wall of the first dust cover 20. An inner buffer block 21 is provided on the inner side of the support ring 22 and the outer side of the piston rod 19. A retaining ring 27 is provided on the outer side of the upper end of the piston rod 19 and below the second suspension ring 29. An independent air tank structure is provided on the outer side of the retaining ring 27 through a second O-ring 26 and a third O-ring 28. An upper spring seat 23 is provided below the independent air tank structure and on the outer side of the first dust cover 20. An upper buffer seat 24 is provided inside the upper spring seat 23. A first spring 12 is provided between the upper buffer seat 24 and the lower buffer seat 11 and on the outer side of the first dust cover 20.

[0021] The independent air tank structure includes an upper cylinder cover 204 and a lower cylinder cover 210. The upper cylinder cover 204 is connected to the bottom of the second lifting ring 29. At the inner top of the upper cylinder cover 204, an upper spring fixing seat 211 is provided. The lower cylinder cover 210 is slidably arranged inside the upper cylinder cover 204. A groove is provided on the end face of the lower cylinder cover 210, and a lower spring fixing seat 207 is arranged inside the groove. A disc spring 208 is arranged between the upper spring fixing seat 211 and the lower spring fixing seat 207. A second buffer block 214 is arranged inside the upper end of the lower cylinder cover 210. A through hole is opened at the upper end of the lower cylinder cover 210, and a second X-ring 213 is arranged on the inner side wall of the through hole. A second gasket 212 is arranged below the second X-ring 213. A third guide belt 209 is arranged on the upper part of the outer side wall of the lower cylinder cover 210. A first X-ring 206 is arranged on the circumferential surface of the lower cylinder cover 210. A first gasket 205 is arranged below the first X-ring 206. A third retaining ring 201 is arranged on the lower part of the inner side wall of the upper cylinder cover 204. A buffer pad 202 is arranged between the third retaining ring 201 and the lower cylinder cover 210. A second guide belt 203 is arranged on the circumferential surface of the lower cylinder cover 210 between the buffer pad 202 and the first gasket 205. When the first spring 12 is squeezed, the first spring 12 will push the upper spring seat 23 upward, squeezing the lower cylinder cover 210 to move upward simultaneously. The upward movement of the lower cylinder cover 210 will squeeze the disc spring 208 to cause its elastic deformation, so that the two springs are deformed simultaneously for shock absorption.

[0022] The through hole opened at the upper end of the lower cylinder cover 210 is inserted and slidably matched with the piston rod 19. A connection joint is arranged at the end of the upper cylinder cover 204, and a pressure maintaining valve assembly 30 is arranged inside the connection joint. A second dust cover 25 is arranged outside the upper cylinder cover 204 for protecting against dust.

[0023] An inwardly concave semi-circular ring groove is arranged inside the lower part of the inner buffer block 21. When the lower part of the inner buffer block 21 comes into contact with the anti-collision cover 18, it can be buffered immediately through the compression deformation of the semi-circular ring groove.

[0024] The lower end of the second dust cover 25 is arranged outside the upper spring seat 23.

[0025] A second retaining ring 13 is arranged outside the oil storage cylinder 5 for limiting the extreme position of the movement of the first dust cover 20.

[0026] By adjusting the valve disc and nut of the rebound valve assembly 14, the shock absorber oil flows back and forth through the pores of the rebound valve assembly 14. The valve has a large damping force on the oil, causing the vibration to decay. The cylinder of the oil storage cylinder 5 is provided with an aluminum floating piston 6, which separates the shock absorber oil from nitrogen. The floating piston 6 is provided with a first O-ring 7 with a large cross-section and a first guide strip 8 made of polytetrafluoroethylene. The first O-ring 7 plays a sealing role, and the first guide strip 8 prevents the floating piston 6 from directly contacting the inner wall of the cylinder of the oil storage cylinder 5. Its material characteristics are corrosion resistance, high abrasion resistance, and high temperature resistance, ensuring a long service life. The other end of the piston rod 19 is provided with a buffer pad 202 made of rubber to prevent the piston rod 19 from directly contacting the guide assembly and play a buffer and shock absorption role. The spring seat outside the cylinder of the oil storage cylinder 5 is made of high-strength aluminum. There is a buffer seat made of rubber between the spring seat and the first spring 12. The first spring 12 plays a key role in support and shock absorption. There is a disc spring 208 in the independent air tank. The disc spring 208 changes the compressed height to change the stroke of the air tank. There are multiple buffer pads 202 in the air tank to isolate the metal and prevent contact between them, preventing abnormal noise. Among them, the serial number buffer block plays a key role. When the air tank is compressed to the limit, it will compress the buffer block, and the buffer block will deform. The cylinder is also provided with an X-ring, a second guide strip 203 made of polytetrafluoroethylene, and a third guide strip 209. Both sides of the shock absorber are composed of a double-hanger structure and are connected to the vehicle through double rubber bushings 2.

[0027] The structural design of the double-spring structure and the external independent air tank of the present utility model deduces from the working principle that the double springs are used to relieve the impact, absorb and release energy, realizing the functions of ensuring kinetic energy recovery and improving the shock absorption efficiency.

Claims

1. A double-spring shock absorber, characterized in that: It includes an oil storage cylinder (5), a bottom cover (4) is arranged at the bottom of the oil storage cylinder (5), a sealing bolt (3) is arranged on the inner side of the middle part of the bottom cover (4), a first lifting ring (1) is connected to the end of the sealing bolt (3), a rubber bushing (2) is arranged on the inner side of the first lifting ring (1), a floating piston (6) is arranged on the inner side of the lower part of the oil storage cylinder (5), a first guide belt (8) is arranged on the circumferential surface of the floating piston (6), an installation groove is formed on the circumferential surface of the floating piston (6), a first O-ring (7) is arranged between the installation groove and the oil storage cylinder (5), a lower spring seat (10) is arranged on the circumferential surface of the oil storage cylinder (5) through a first retaining ring (9), a lower buffer seat (11) is arranged on the inner side of the lower spring seat (10), a collision-proof cover (18) is arranged at the end of the oil storage cylinder (5), a piston rod (19) is hermetically and slidably arranged in the middle of the collision-proof cover (18), a restoring valve assembly (14) is connected to the outer side of the lower end of the piston rod (19), a limit seat (15) is arranged on the outer side of the lower part of the piston rod (19), a first buffer block (16) is arranged on the side surface of the limit seat (15), a sliding assembly (17) is arranged on the outer side of the first buffer block (16) and on the outer side of the piston rod (19), a second lifting ring (29) is connected to the outer side of the upper end of the piston rod (19), a first dust-proof cover (20) is arranged on the outer side of the upper part of the piston rod (19), a support ring (22) is arranged on the inner side wall of the first dust-proof cover (20), an inner buffer block (21) is arranged on the inner side of the support ring (22) and on the outer side of the piston rod (19), a retaining ring (27) is arranged on the outer side of the upper end of the piston rod (19) and below the second lifting ring (29), an independent air tank structure is arranged on the outer side of the retaining ring (27) through a second O-ring (26) and a third O-ring (28), an upper spring seat (23) is arranged below the independent air tank structure and on the outer side of the first dust-proof cover (20), an upper buffer seat (24) is arranged on the inner side of the upper spring seat (23), and a first spring (12) is arranged between the upper buffer seat (24) and the lower buffer seat (11) and on the outer side of the first dust-proof cover (20).

2. The double spring shock absorber according to claim 1, characterized in that: The independent air cylinder structure includes a cylinder upper cover (204) and a cylinder lower cover (210). The cylinder upper cover (204) is connected to the bottom of the second lifting ring (29). At the inner top of the cylinder upper cover (204), there is an upper spring fixing seat (211). The cylinder lower cover (210) is slidably arranged inside the cylinder upper cover (204). On the end face of the cylinder lower cover (210), there is a groove and an inner lower spring fixing seat (207) is arranged inside the groove. A disc spring (208) is arranged between the upper spring fixing seat (211) and the lower spring fixing seat (207). At the inner upper end of the cylinder lower cover (210), there is a second buffer block (214). A through hole is opened at the upper end of the cylinder lower cover (210), and a second X-ring (213) is arranged on the inner side wall of the through hole. Below the second X-ring (213), there is a second gasket (212). On the upper part of the outer wall of the cylinder lower cover (210), there is a third guide strip (209). On the circumferential surface of the cylinder lower cover (210), there is a first X-ring (206). Below the first X-ring (206), there is a first gasket (205). At the lower part of the inner wall of the cylinder upper cover (204), there is a third retaining ring (201). A buffer pad (202) is arranged between the third retaining ring (201) and the cylinder lower cover (210). On the circumferential surface of the cylinder lower cover (210), and between the buffer pad (202) and the first gasket (205), there is a second guide strip (203).

3. A double spring shock absorber according to claim 2, characterized in that: The through hole opened at the upper end of the cylinder lower cover (210) is inserted and slidably engaged with the piston rod (19).

4. A double spring shock absorber according to claim 2, characterized in that: At the end of the cylinder upper cover (204), there is a connection joint, and a pressure maintaining valve assembly (30) is arranged inside the connection joint.

5. A double spring shock absorber according to claim 2, characterized in that: A second dust cover (25) is arranged outside the cylinder upper cover (204).

6. A double spring shock absorber according to claim 1, characterized in that: On the inner lower part of the inner buffer block (21), there is a semi-circular annular groove recessed inward.

7. A double spring shock absorber according to claim 1, characterized in that: The lower end of the first dust cover (20) is arranged on the outer side of the upper end of the oil storage cylinder (5) and is slidably engaged.

8. A double spring shock absorber according to claim 5, characterized in that: The lower end of the second dust cover (25) is arranged on the outer side of the upper spring seat (23).

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