A piston component accumulator for a hydraulic suspension system and a hydraulic suspension system

Abstract

The utility model belongs to the field of hydraulic suspension, especially relate to a piston part formula energy accumulator for hydraulic suspension system and hydraulic suspension system, include: cylinder body and piston part, one end of cylinder body is open end, the other end is closed end, piston part sets up in cylinder body, and piston part is air cavity between with closed end, the outside wall of piston part one side is provided with first recess, second recess, third recess and fourth recess, is provided with first guide ring in first recess, is provided with second guide ring in third recess, is provided with first retaining ring, O type sealing ring and second retaining ring in second recess, O type sealing ring is located between first retaining ring and second retaining ring, is provided with limit retaining ring between fourth recess and cylinder body, and limit retaining ring is located at cylinder body near open end place, the utility model effectively protected the sealing property of piston sealing piece, improved the reliability and durability of product.

Description

Technical Field

[0001] This utility model belongs to the field of hydraulic suspension, and particularly relates to a piston component accumulator for a hydraulic suspension system and a hydraulic suspension system. Background Technology

[0002] The commonly used piston-type accumulator is a hydraulic energy storage device. Its working principle is as follows: the piston component isolates the cylinder into two chambers (a gas chamber and an oil chamber). The sealed gas chamber is pre-filled with a certain pressure of gas (inert gas), while the oil chamber is connected to the system's oil circuit. When the suspension system's oil pressure rises, the hydraulic oil pushes the piston component upwards, compressing the gas, increasing the pressure in the gas chamber until the suspension system's oil pressure reaches the system's target pressure, at which point the piston component stops moving. When the system's oil pressure decreases, the gas pressure is higher than the oil pressure, and the gas pushes the piston component downwards until equilibrium is reached. The accumulator then replenishes the system with hydraulic fluid through the oil port.

[0003] In existing technologies, the quality of the piston component seals directly determines the service life of the accumulator. Existing accumulator piston component seals are easily squeezed into gaps, leading to deformation and failure. Summary of the Invention

[0004] This utility model provides a piston-type accumulator for a hydraulic suspension system and a hydraulic suspension system, which solves the problem mentioned in the background art that the seal of the piston component of the existing accumulator is easily squeezed into the gap, resulting in deformation and failure.

[0005] One technical solution of this utility model is as follows: A piston component type accumulator for a hydraulic suspension system includes: a cylinder body and a piston component, one end of the cylinder body is an open end and the other end is a closed end, the piston component is disposed in the cylinder body, and an air chamber is formed between the piston component and the closed end; The piston component has a first groove, a second groove, a third groove, and a fourth groove on one side of its outer wall. A first guide ring is provided in the first groove, a second guide ring is provided in the third groove, a first retaining ring, an O-ring seal, and a second retaining ring are provided in the second groove, with the O-ring seal located between the first and second retaining rings. A limiting retaining ring is provided between the fourth groove and the cylinder body, with the limiting retaining ring located near the opening end of the cylinder body.

[0006] Furthermore, a limiting step and a sealing ring are provided on the outer wall of the cylinder, and the sealing ring is located between the limiting step and the opening end.

[0007] Furthermore, the outer wall of the cylinder is provided with threads, which are located between the sealing ring and the open end.

[0008] Furthermore, the piston component has a cavity at its center, which faces the closed end.

[0009] Furthermore, the first guide ring, the second guide ring, the first retaining ring, and the second retaining ring are all made of materials that are resistant to high temperatures, wear-resistant, and have a low coefficient of friction.

[0010] Another technical solution of this utility model is as follows: A hydraulic suspension system, comprising: an oil tank, an electric pump, a control valve, a solenoid valve, a check valve, a hydraulic suspension functional component, and a piston component accumulator for the hydraulic suspension system as described above. One end of the electric pump is connected to the oil tank, and the other end is connected to one end of the control valve. The other end of the control valve is connected to the piston component accumulator, one end of the check valve, and one end of the solenoid valve. The other end of the check valve is connected to the other end of the solenoid valve and the hydraulic suspension functional component.

[0011] The beneficial effects of this utility model are: This invention employs a multi-layer sealing structure, pressure-balancing grooves, and high-temperature, high-pressure resistant materials to improve the sealing performance, durability, and cost-effectiveness of the accumulator assembly. The high-temperature, high-pressure resistant sealing material used in this invention exhibits low friction with the cylinder body. The multi-layer sealing structure reduces the possibility of air leakage and damage. This invention is applied to hydraulic suspension systems, meeting the suspension's requirements for stable hydraulic oil pressure fluctuations. This invention effectively protects the sealing performance of the piston seals, improving product reliability and durability. Attached Figure Description

[0012] Figure 1 This is an assembly diagram of the piston-type accumulator used in the hydraulic suspension system of this utility model.

[0013] Figure 2 This is a schematic diagram of a piston-type accumulator used in a hydraulic suspension system according to this utility model.

[0014] Figure 3 This is a schematic diagram of the piston component structure of the piston component accumulator used in the hydraulic suspension system of this utility model.

[0015] Figure 4 This is a schematic diagram of the hydraulic suspension system of this utility model. Detailed Implementation

[0016] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. The described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0017] In one technical solution of this utility model, Figure 1 This is a structural schematic diagram of a piston-type accumulator for a hydraulic suspension system according to the present invention, as shown below. Figure 1 As shown, this technical solution includes: a cylinder body 1 and a piston component 2. One end of the cylinder body 1 is an open end and the other end is a closed end. The piston component 2 is disposed inside the cylinder body 1, and the space between the piston component 2 and the closed end is a gas chamber 1c.

[0018] The piston component 2 has a first groove 212, a second groove 213, a third groove 214, and a fourth groove 215 on one side of its outer wall. A first guide ring 25 is disposed in the first groove 212, a second guide ring 26 is disposed in the third groove 214, and a first retaining ring 22, an O-ring 23, and a second retaining ring 24 are disposed in the second groove 213. The O-ring 23 is located between the first retaining ring 22 and the second retaining ring 24. A limiting retaining ring 3 is disposed between the fourth groove 215 and the cylinder body 1, and the limiting retaining ring 3 is located near the open end of the cylinder body 1. A cavity 211 is disposed at the center of the piston component 2, and the cavity 211 faces the closed end.

[0019] The cylinder body 1 contains a piston component 2, which includes a piston 21, a first retaining ring 22, an O-ring seal 23, a second retaining ring 24, a first guide ring 25, and a second guide ring 26. The outer ring of the piston component 2 has a first groove 212, a second groove 213, a third groove 214, and a fourth groove 215. The first groove 212 contains the first guide ring 25, and the second groove 213 contains the first retaining ring 22, the second retaining ring 24, and the O-ring seal 23. The O-ring seal 23 is located between the first retaining ring 22 and the second retaining ring 24. The width of the second groove 213 should be greater than the sum of the thicknesses of the first retaining ring 22, the second retaining ring 24, and the O-ring seal 23. The piston 2 can move up and down relative to the cylinder body under the action of external force.

[0020] The piston 21 is provided with a cavity 211, a first groove 212, a second groove 213, a third groove 214 and a fourth groove 215. The first groove 212 contains a first guide ring 25, the third groove 214 contains a second guide ring 26, the second groove 213 contains a first retaining ring 22, an O-ring 23 and a second retaining ring 24, and the fourth groove 215 is used to limit the retaining ring 3.

[0021] The limiting retaining ring 3 is installed in the open annular groove at the end of the cylinder body 1, pressing against the fourth groove 215 of the piston, thus limiting the piston to the initial position when it is not in operation.

[0022] The first guide ring 25 and the second guide ring 26 on the piston assembly 2 are both rectangular rings. Their outer surfaces are attached to the inner wall of the cylinder body 1, which plays a guiding role and meets the requirements of the reciprocating motion of the piston assembly 2 and the cylinder body 1.

[0023] When the pump supplies pressure to the system, the external oil pressure is greater than the pre-charged gas pressure in the gas chamber 1c. At this time, the hydraulic oil pushes the piston upward and enters the energy storage stage of the accumulator until the pressure is balanced. The O-ring 23 tightly fits the first retaining ring 22 to achieve sealing.

[0024] When the hydraulic actuator of the suspension system needs hydraulic oil to work, the hydraulic oil pressure of the accumulator is lower than the pressure of the air chamber 1c. The gas in the air chamber 1c pushes the piston downward and enters the energy release stage of the accumulator until the pressure is balanced. At this time, the O-ring 23 on the piston 21 tightly fits the second retaining ring 24 to achieve sealing.

[0025] When the piston 21 moves relative to the cylinder 1, the O-ring 23 is protected by the first retaining ring 22 and the second retaining ring 24, and will not be squeezed into the gap between the piston 21 and the cylinder 1, thus playing the role of protecting the O-ring.

[0026] In one embodiment of this utility model, a limiting step 1b and a sealing ring 4 are provided on the outer wall of the cylinder body 1, and the sealing ring 4 is located between the limiting step 1b and the open end. A thread 1a is provided on the outer wall of the cylinder body 1, and the thread 1a is located between the sealing ring 4 and the open end.

[0027] The cylinder body 1 has a thread 1a and a limiting step 1b on its outer side. A sealing ring 4 is installed above the external thread. The cylinder body 1 is connected to the suspension through the external thread 1a and sealed by the sealing ring 4 to prevent hydraulic oil leakage. The limiting step 1b cooperates with the suspension mounting surface for limiting.

[0028] The first guide ring 25, the second guide ring 26, the first retaining ring 22, and the second retaining ring 24 are all made of high-temperature resistant, wear-resistant, and low-friction coefficient self-lubricating plastic, ensuring that the system has low friction characteristics.

[0029] The first guide ring 25, the second guide ring 26, the first retaining ring 22 and the second retaining ring 24 are all made of materials that are resistant to high temperature, wear-resistant and have a low coefficient of friction.

[0030] The first guide ring 25, the second guide ring 26, the first retaining ring 22, and the second retaining ring 24 are all made of high-temperature resistant, wear-resistant, and low-friction coefficient (self-lubricating effect) plastics, ensuring that the system has low-friction characteristics.

[0031] In one technical solution of this utility model, Figure 4 This invention provides a structural diagram of a hydraulic suspension system. The system includes: an oil tank 10, an electric pump 11, a control valve 12, a solenoid valve 13, a check valve 15, a hydraulic suspension functional component 17, and a piston-type accumulator 14 for the hydraulic suspension system as described above. One end of the electric pump 11 is connected to the oil tank 10, and the other end is connected to one end of the control valve 12. The other end of the control valve 12 is connected to one end of the piston-type accumulator 14, one end of the check valve 15, and one end of the solenoid valve 13. The other end of the check valve 15 is connected to the other end of the solenoid valve 13 and the hydraulic suspension functional component 17. The hydraulic suspension functional component 17 includes a shock absorber 18 and a shock-absorbing spring 16.

[0032] The piston isolates the cylinder into two chambers (a gas chamber and an oil chamber). The sealed gas chamber is pre-filled with a certain pressure of gas (inert gas), while the oil chamber is connected to the system's oil circuit. When the hydraulic pressure in the hydraulic suspension system rises, the hydraulic oil pushes the piston upward to compress the gas, increasing the pressure in the gas chamber until pressure equilibrium is reached, at which point the piston stops moving. When the system oil pressure decreases, the gas pressure is higher than the oil pressure, and the gas pushes the piston downward until pressure equilibrium is reached. The accumulator then replenishes the system with oil through the oil port to maintain the system pressure.

[0033] Excess pressure energy can be converted into elastic potential energy and stored, and then released when needed. This effectively eliminates pressure fluctuations in the hydraulic system, keeping the pressure in the suspension stable.

[0034] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A piston-type accumulator for a hydraulic suspension system, characterized in that, include: The cylinder (1) and piston assembly (2) are provided. One end of the cylinder (1) is an open end and the other end is a closed end. The piston assembly (2) is disposed inside the cylinder (1). The piston assembly (2) and the closed end form an air chamber (1c). The piston component (2) has a first groove (212), a second groove (213), a third groove (214) and a fourth groove (215) on one side of its outer wall. A first guide ring (25) is provided in the first groove (212), a second guide ring (26) is provided in the third groove (214), a first retaining ring (22), an O-ring seal (23) and a second retaining ring (24) are provided in the second groove (213). The O-ring seal (23) is located between the first retaining ring (22) and the second retaining ring (24). A limiting retaining ring (3) is provided between the fourth groove (215) and the cylinder (1). The limiting retaining ring (3) is located near the opening end of the cylinder (1).

2. The piston-type accumulator for a hydraulic suspension system as described in claim 1, characterized in that, The cylinder body (1) is provided with a limiting step (1b) and a sealing ring (4) on its outer wall. The sealing ring (4) is located between the limiting step (1b) and the opening end.

3. The piston-type accumulator for a hydraulic suspension system as described in claim 1, characterized in that, The cylinder body (1) has a thread (1a) on its outer wall, and the thread (1a) is located between the sealing ring (4) and the opening end.

4. The piston-type accumulator for a hydraulic suspension system as described in claim 1, characterized in that, The piston component (2) has a cavity (211) at its center, and the cavity (211) faces the closed end.

5. The piston-type accumulator for a hydraulic suspension system as described in claim 1, characterized in that, The first guide ring (25), the second guide ring (26), the first retaining ring (22), and the second retaining ring (24) are all made of materials that are resistant to high temperature, wear-resistant, and have a low coefficient of friction.

6. A hydraulic suspension system, characterized in that, include: The system comprises an oil tank, an electric pump, a control valve, a solenoid valve, a check valve, a hydraulic suspension component, and a piston-type accumulator for a hydraulic suspension system as described in any one of claims 1-5. One end of the electric pump is connected to the oil tank, and the other end is connected to one end of the control valve. The other end of the control valve is connected to the piston-type accumulator, one end of the check valve, and one end of the solenoid valve. The other end of the check valve is connected to the other end of the solenoid valve and the hydraulic suspension component.

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