Low speed solenoid valve damper

Abstract

The present invention belongs to the technical field of electromagnetic valve shock absorbers, and discloses a low-speed electromagnetic valve shock absorber, including an oil seal, wherein a guide seat is arranged at the right end of the oil seal, a working cylinder is sealed and connected to the outer wall of the right end of the guide seat, an oil storage cylinder assembly is sealed and connected to the right end of the oil seal, a separation oil cylinder is arranged on the outer wall of the working cylinder, and a low-speed valve assembly is connected to the outer wall of the oil storage cylinder assembly. The present invention seals the end face of the flow hole on the valve seat through a valve plate to prevent leakage. When the low-speed oil enters the low-speed valve assembly from the A2 oil chamber to the A1 oil chamber, the oil first accumulates energy in the A0 oil chamber, and can flow into the P1 oil chamber only after reaching the valve opening pressure of the low-speed valve, thereby increasing the pressure of the oil entering the electromagnetic valve and improving the low-speed damping force. When the high-speed oil enters the low-speed valve assembly from the A2 oil chamber to the A1 oil chamber, the energy storage pressure of the oil in the A0 oil chamber is relatively small, and the oil can more easily reach the valve opening pressure of the low-speed valve, so the low-speed valve has less influence on the high-speed damping force.

Description

Technical Field

[0001] The invention belongs to the technical field of electromagnetic valve dampers, in particular to a low-speed electromagnetic valve damper. Background Art

[0002] Solenoid valve shock absorbers control the flow of oil by adjusting the opening and closing degree of the solenoid valve, thereby affecting the damping force. This type of shock absorber contains a piston cylinder filled with oil and an oil circuit equipped with a solenoid valve. The electronic control unit (ECU) processes sensor data and calculates the optimal damping setting. The ECU can adjust the opening and closing degree of the solenoid valve in real time to adapt to different driving conditions and road surface changes. This continuous damping control method can provide an almost unlimited damping force adjustment range, from very soft to very hard, thereby significantly improving the vehicle's suspension performance.

[0003] The existing external solenoid valve vibration reduction technology is characterized by using a single solenoid valve to control the damping force. The damping force can only be adjusted by the main valve system and the solenoid valve. The factors affecting the performance characteristics are relatively single, and it is impossible to achieve separate control of low speed and high speed. In the present invention, a valve system is added in front of the solenoid valve, which significantly improves the low-speed damping force without affecting the high-speed damping force. Summary of the invention

[0004] In order to solve the problems raised in the above background technology, the present invention provides a low-speed solenoid valve damper.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a low-speed solenoid valve shock absorber, comprising an oil seal, a guide seat is arranged at the right end of the oil seal, the outer wall of the right end of the guide seat is sealed and connected with a working cylinder, the right end of the oil seal is sealed and connected with an oil storage cylinder assembly, a separation oil cylinder is arranged on the outer wall of the working cylinder, a low-speed valve assembly is connected to the outer wall of the oil storage cylinder assembly, the upper end of the low-speed valve assembly is connected to the solenoid valve assembly, the rear end inner wall of the oil storage cylinder assembly is sealed and connected with a bottom valve, and the rear end inner wall of the working cylinder is fixedly connected with the bottom valve.

[0006] Preferably, the low-speed valve assembly includes a joint, a valve seat, a valve plate and a pilot valve seat, the joint is connected to the outer wall of the oil storage cylinder assembly, the upper end of the joint is provided with a valve seat, the upper end of the valve seat is provided with a valve plate, and the outer wall of the valve seat is provided with a pilot valve seat.

[0007] Preferably, the joint is used to connect the oil storage cylinder assembly and the valve seat, the inner wall of the pilot valve seat is provided with a P1 oil cavity, and the upper end surface of the valve seat is provided with a flow hole.

[0008] Preferably, an O-ring is used to seal between the joint and the valve seat, the joint and the valve seat are riveted, the O-ring is arranged in the middle of the riveting, and the inner wall of the joint forms a P0 oil chamber.

[0009] Preferably, the solenoid valve assembly includes a sealing valve plate, a reflux valve seat, an end cap and a safety valve. The sealing valve plate is installed on the upper end of the pilot valve seat, the reflux valve seat is installed on the upper end of the sealing valve plate, the upper inner wall of the reflux valve seat is connected to the end cap, and the upper end of the end cap is connected to the safety valve.

[0010] Preferably, a P3 oil chamber is formed between the reflux valve seat and the end cap, a P4 oil chamber is formed on both sides of the reflux valve seat, and a P2 oil chamber is formed at the lower end of the reflux valve seat.

[0011] Preferably, an A0 oil chamber is formed between the separation oil cylinder and the oil storage cylinder assembly.

[0012] Preferably, an A2 oil chamber is formed between the working cylinder and the piston rod recovery valve assembly.

[0013] Preferably, an A3 oil chamber is formed between the piston rod recovery valve assembly and the bottom valve.

[0014] Preferably, an A1 oil chamber is provided between the working cylinder and the separation cylinder.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention cooperates with the electromagnetic valve assembly and the low-speed valve assembly, wherein an O-ring seal is provided between the riveted connection between the joint and the valve seat, and the valve plate seals the end face of the flow hole on the valve seat to prevent leakage. When the low-speed oil enters the low-speed valve assembly from the A2 oil chamber to the A1 oil chamber, the oil first stores energy in the A0 oil chamber, and can flow into the P1 oil chamber only after reaching the valve opening pressure of the low-speed valve. In this way, the pressure of the oil entering the electromagnetic valve is increased, so that the low-speed damping force is improved. When the high-speed oil enters the low-speed valve assembly from the A2 oil chamber to the A1 oil chamber, the energy storage pressure of the oil in the A0 oil chamber is relatively small, and the oil can more easily reach the valve opening pressure of the low-speed valve, so the low-speed valve has less influence on the high-speed damping force.

[0016] In the present invention, the oil flows through the pilot valve seat, the pilot valve seat, the return valve seat, the end cap, reaches the P3 oil chamber, and reaches the P4 oil chamber after being intercepted by the safety valve. The solenoid valve assembly 8 can control the contact distance between the end cap and the return valve seat, thereby affecting the interception area. When the current is low, the end cap is in the middle position, and its interception area is large. The safety valve is in an open state, and the interception area is increased. The pressure difference between the P3 oil chamber and the P4 oil chamber produces a low-speed damping force, resulting in an increase in the pressure difference between the P2 oil chamber and the P1 oil chamber, and it is easier to open the sealing valve plate. The P1 oil chamber and the P2 oil chamber produce a high-speed damping force. When the current increases, the end cap is in the lowest position and contacts the upper end of the return valve seat, and its interception area is the smallest. The pressure difference between the P3 oil chamber and the P4 oil chamber produces a low-speed damping force, resulting in a decrease in the pressure difference between the P2 oil chamber and the P1 oil chamber, and it is difficult to open the sealing valve plate. In this way, the P1 oil chamber and the P2 oil chamber produce a high-speed damping force.

[0017] The present invention moves the piston rod restoring valve assembly and the restoring valve assembly downward and presses into the shock absorber, so that the volume of the A3 oil chamber decreases and the pressure increases. The oil flows through the main valve system on the piston rod restoring valve assembly through the A2 oil chamber-A1 oil chamber and enters the solenoid valve assembly to generate a damping force, and then flows into the A0 oil chamber. The oil passes through the solenoid valve assembly and generates a corresponding restoring damping force according to the current input. The oil flows out of the solenoid valve assembly and the A0 oil chamber. At the same time, the volume of the A3 oil chamber increases and the pressure decreases. The oil in the A0 oil chamber is supplemented to the A3 oil chamber through the compression valve to achieve pressure balance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall cutaway structure of the present invention; Figure 2 It is a schematic diagram of the cross-section structure of the solenoid valve assembly of the present invention; Figure 3 It is a schematic diagram of the cross-section structure of the low-speed valve assembly of the present invention; Figure 4 It is a schematic diagram of the overall front view structure of the present invention.

[0019] In the figure: 1. oil seal; 2. guide seat; 3. working cylinder; 4. separation cylinder; 5. oil storage cylinder assembly; 6. piston rod recovery valve assembly; 7. low-speed valve assembly; 8. solenoid valve assembly; 9. bottom valve; 10. bottom cover; 11. A3 oil chamber; 12. A2 oil chamber; 13. A1 oil chamber; 14. A0 oil chamber; 701. joint; 702. valve seat; 703. valve plate; 704. pilot valve seat; 801. sealing valve plate; 802. reflux valve seat; 803. end cap; 804. safety valve; 805. P3 oil chamber; 806. P4 oil chamber; 807. P2 oil chamber; 808. P1 oil chamber; 809. P0 oil chamber. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] like Figure 1As shown, the present invention provides a low-speed solenoid valve shock absorber, including an oil seal 1, a guide seat 2 is provided at the right end of the oil seal 1, a working cylinder 3 is sealed on the outer wall of the right end of the guide seat 2, an oil storage cylinder assembly 5 is sealed on the right end of the oil seal 1, a separation oil cylinder 4 is provided on the outer wall of the working cylinder 3, a low-speed valve assembly 7 is connected to the outer wall of the oil storage cylinder assembly 5, an electromagnetic valve assembly 8 is connected to the upper end of the low-speed valve assembly 7, a bottom valve 9 is sealed on the rear end inner wall of the oil storage cylinder assembly 5, a bottom valve 9 is fixedly connected to the rear end inner wall of the working cylinder 3, an A0 oil chamber 14 is formed between the separation oil cylinder 4 and the oil storage cylinder assembly 5, an A2 oil chamber 12 is formed between the working cylinder 3 and the piston rod recovery valve assembly 6, an A3 oil chamber 11 is formed between the piston rod recovery valve assembly 6 and the bottom valve 9, and an A1 oil chamber 13 is formed between the working cylinder 3 and the separation oil cylinder 4.

[0022] Adopting the above scheme: during compression, the piston rod restoring valve assembly 6 and the restoring valve assembly move downward and press into the shock absorber, the volume of the A3 oil chamber 11 decreases, the pressure increases, and the oil flows through the main valve system on the piston rod restoring valve assembly 6, through the A2 oil chamber 12-A1 oil chamber 13, into the solenoid valve assembly 8, generates damping force, and then flows into the A0 oil chamber 14. During restoration, the piston rod restoration valve assembly 6 and the restoration valve assembly move upward, the piston rod is pulled out of the shock absorber, the volume of the A2 oil chamber 12 decreases, the pressure increases, and the oil passes through the small hole above the working cylinder 3, through the A1 oil chamber 13 inside the separation cylinder 4, and through the 7 low-speed valve to flow to the solenoid valve assembly 8. The oil passes through the solenoid valve assembly 8 and generates corresponding restoration damping force according to the current input. The oil flows out of the A0 oil chamber 14 of the solenoid valve assembly 8. At the same time, the volume of the A3 oil chamber 11 increases, the pressure decreases, and the oil in the A0 oil chamber 14 is replenished to the A3 oil chamber 11 through the compression valve to achieve pressure balance.

[0023] like Figure 2 As shown, the present invention provides a low-speed solenoid valve damper, the solenoid valve assembly 8 includes a sealing valve disc 801, a reflux valve seat 802, an end cap 803 and a safety valve 804, the sealing valve disc 801 is installed on the upper end of the pilot valve seat 704, the reflux valve seat 802 is installed on the upper end of the sealing valve disc 801, the upper end inner wall of the reflux valve seat 802 is connected with the end cap 803, the upper end of the end cap 803 is connected with the safety valve 804, a P3 oil chamber 805 is formed between the reflux valve seat 802 and the end cap 803, P4 oil chambers 806 are formed on both sides of the reflux valve seat 802, and a P2 oil chamber 807 is formed at the lower end of the reflux valve seat 802.

[0024] The above scheme is adopted: during the compression or recovery process, the oil enters the solenoid valve through the low-speed valve assembly 7 and is divided into two oil circuits. The first oil circuit passes through the pilot valve seat 704 to form the first P1 oil chamber 808, and the second oil circuit passes through the return valve seat 802. The oil passing through the return valve seat 802 also forms two oil circuits. The first oil circuit forms the second P2 oil chamber 807, and the second oil circuit passes through the end cap 803 to form the P3 oil chamber 805, and then passes through the safety valve 804 to enter the P4 oil chamber 806 and is connected to the oil storage cylinder assembly 5. During the damping force generation process, the oil flows through the pilot valve seat 704, the pilot valve seat, the return valve seat 802, and the end cap 803 to reach the P3 oil chamber 805. After the safety valve 804 cuts off the flow, it reaches the P4 oil chamber 806. The solenoid valve assembly 8 can control the contact distance between the end cap 803 and the return valve seat 802, thereby affecting the cut-off area. When the current is low, the end cap 803 is in the middle position, and its cut-off area is larger. The safety valve 804 is in the open state, and the cut-off area increases. The pressure difference between the P3 oil chamber 805 and the P4 oil chamber 806 produces a low-speed damping force, which causes the pressure difference between the P2 oil chamber 807 and the P1 oil chamber 808 to increase, and the sealing valve plate 801 is easier to open. The P1 oil chamber 808 and the P2 oil chamber 807 produce a high-speed damping force. When the current increases, the end cap 803 is at the lowest position and contacts the upper end of the return valve seat 802, and its cut-off area is the smallest. The pressure difference between the P3 oil chamber 805 and the P4 oil chamber 806 generates a low-speed damping force, which causes the pressure difference between the P2 oil chamber 807 and the P1 oil chamber 808 to decrease, making it more difficult to open the sealing valve plate 801, so that the P1 oil chamber 808 and the P2 oil chamber 807 generate a high-speed damping force.

[0025] like Figure 3 As shown, the present invention provides a low-speed solenoid valve damper, the low-speed valve assembly 7 includes a joint 701, a valve seat 702, a valve plate 703 and a pilot valve seat 704, the joint 701 is connected to the outer wall of the oil storage cylinder assembly 5, the upper end of the joint 701 is provided with a valve seat 702, the upper end of the valve seat 702 is provided with a valve plate 703, the outer wall of the valve seat 702 is sleeved with a pilot valve seat 704, the joint 701 is used to connect the oil storage cylinder assembly 5 and the valve seat 702, the inner wall of the pilot valve seat 704 is provided with a P1 oil cavity 808, the upper end surface of the valve seat 702 is provided with a flow hole, an O-ring is used to seal between the joint 701 and the valve seat 702, the joint 701 and the valve seat 702 are riveted, the O-ring is provided in the middle of the riveting, and the inner wall of the joint 701 forms a P0 oil cavity 809.

[0026] The above scheme is adopted: the low-speed valve is integrated at the lower end of the solenoid valve assembly 8, wherein the joint 701 and the valve seat 702 are riveted with an O-ring seal in the middle, and the valve plate 703 seals the end face of the flow hole on the valve seat 702 to prevent leakage. When the low-speed oil enters the low-speed valve assembly 7 from the A2 oil chamber 12 to the A1 oil chamber 13, the oil must first be stored in the A0 oil chamber 14, and can only flow into the P1 oil chamber 808 after reaching the valve opening pressure of the low-speed valve. In this way, the pressure of the oil entering the solenoid valve is increased, so that the low-speed damping force is increased. When the high-speed oil enters the low-speed valve assembly 7 from the A2 oil chamber 12 to the A1 oil chamber 13, the oil storage pressure in the A0 oil chamber 14 is relatively small, and the oil can more easily reach the valve opening pressure of the low-speed valve, so the low-speed valve has less influence on the high-speed damping force.

[0027] The working principle and use process of the present invention are as follows: during compression, the piston rod recovery valve assembly 6 and the recovery valve assembly move downward and press into the shock absorber, the volume of the A3 oil chamber 11 decreases, the pressure increases, and the oil flows through the main valve system on the piston rod recovery valve assembly 6, through the A2 oil chamber 12-A1 oil chamber 13, into the solenoid valve assembly 8, generates damping force, and then flows into the A0 oil chamber 14. During recovery, the piston rod recovery valve assembly 6 and the recovery valve assembly move upward. When the piston rod is pulled out of the shock absorber, the volume of the A2 oil chamber 12 decreases, and the pressure increases. The oil will pass through the small hole above the working cylinder 3, through the A1 oil chamber 13 inside the separation cylinder 4, and through the 7 low-speed valve to flow to the solenoid valve assembly 8. The oil passes through the solenoid valve assembly 8 and generates corresponding restoring damping force according to the current input. The oil flows out of the A0 oil chamber 14 of the solenoid valve assembly 8. At the same time, the volume of the A3 oil chamber 11 increases, and the pressure decreases. The oil in the A0 oil chamber 14 is replenished to the A3 oil chamber 11 through the compression valve to achieve pressure balance. During the compression or recovery process, the oil enters the solenoid valve through the low-speed valve assembly 7 and is divided into two oil circuits. The first oil circuit passes through the pilot valve seat 704 to form the first P1 oil chamber 808, and the second oil circuit passes through the return valve seat 802. The oil passing through the return valve seat 802 also forms two oil circuits. The first oil circuit forms the second P2 oil chamber 807, and the second oil circuit passes through the end cap 803 to form the P3 oil chamber 805 Then, it passes through the safety valve 804 and enters 806 to be connected with the oil storage cylinder assembly 5. In the damping force generation process, the oil flows through the pilot valve seat 704, the pilot valve seat, the return valve seat 802, the end cap 803 to reach the P3 oil chamber 805, and reaches the P4 oil chamber 806 after being cut off by the safety valve 804. The solenoid valve assembly 8 can control the contact distance between the end cap 803 and the return valve seat 802, thereby affecting the cut-off area. When the current is low, the end cap 803 is in the middle position. Its intercepting area is large, the safety valve 804 is in the open state, the intercepting area increases, the pressure difference between the P3 oil chamber 805 and the P4 oil chamber 806 generates a low-speed damping force, resulting in an increase in the pressure difference between the P2 oil chamber 897 and the P1 oil chamber 808, the sealing valve plate 801 is easier to open, the P1 oil chamber 808 and the P2 oil chamber 807 generate a high-speed damping force, when the current increases, the end cap 803 is at the lowest position and contacts the upper end of the return valve seat 802, and its intercepting area is the smallest. The pressure difference between the P3 oil chamber 805 and the P4 oil chamber 806 generates a low-speed damping force, which causes the pressure difference between the P2 oil chamber 807 and the P1 oil chamber 808 to become smaller, making it more difficult to open the sealing valve plate 801. In this way, the P1 oil chamber 808 and the P2 oil chamber 807 generate a high-speed damping force. During the compression or recovery process, the oil enters the solenoid valve through the low-speed valve assembly 7 and is divided into two oil circuits. The first oil circuit passes through the pilot valve seat 704 to form the first P1 oil chamber 808, and the second oil circuit passes through the return valve seat 802. The oil passing through the return valve seat 802 also forms two oil circuits. The first oil circuit forms the second P2 oil chamber 807, and the second oil circuit passes through the end cap 803 and then reaches the stroke 805.Then, after passing through the safety valve 804, it enters the P4 oil chamber 806 and is connected to the oil storage cylinder assembly 5. During the damping force generation process, the oil flows through the pilot valve seat 704, the pilot valve seat, the return valve seat 802, and the end cap 803 to reach the P3 oil chamber 805. After being cut off by the safety valve 804, it reaches the P4 oil chamber 806. The solenoid valve assembly 8 can control the contact distance between the end cap 803 and the return valve seat 802, thereby affecting the cut-off area. When the current is low, the end cap 803 is in the middle position , its intercepting area is large, the safety valve 804 is in the open state, the intercepting area increases, the pressure difference between the P3 oil chamber 805 and the P4 oil chamber 806 produces a low-speed damping force, resulting in an increase in the pressure difference between the P2 oil chamber 897 and the P1 oil chamber 808, and the sealing valve plate 801 is easier to open. The P1 oil chamber 808 and the P2 oil chamber 807 produce a high-speed damping force. When the current increases, the end cap 803 is at the lowest position and contacts the upper end of the return valve seat 802, and its intercepting area is the smallest. The pressure difference between the P3 oil chamber 805 and the P4 oil chamber 806 produces a low-speed damping force, resulting in a decrease in the pressure difference between the P2 oil chamber 807 and the P1 oil chamber 808, and it is difficult to open the sealing valve plate 801. In this way, the P1 oil chamber 808 and the P2 oil chamber 807 produce a high-speed damping force. ,

[0028] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A low-speed solenoid valve damper, comprising an oil seal (1), characterized in that: The right end of the oil seal (1) is provided with a guide seat (2), the right end outer wall of the guide seat (2) is sealingly connected to a working cylinder (3), the right end of the oil seal (1) is sealingly connected to an oil storage cylinder assembly (5), the outer wall of the working cylinder (3) is provided with a separation cylinder (4), the outer wall of the oil storage cylinder assembly (5) is connected to a low-speed valve assembly (7), the upper end of the low-speed valve assembly (7) is connected to a solenoid valve assembly (8), the rear end inner wall of the oil storage cylinder assembly (5) is sealingly connected to a bottom valve (9), and the rear end inner wall of the working cylinder (3) is fixedly connected to the bottom valve (9).

2. The low speed solenoid valve damper according to claim 1, characterized in that: The low-speed valve assembly (7) comprises a joint (701), a valve seat (702), a valve plate (703) and a pilot valve seat (704); the joint (701) is connected to the outer wall of the oil storage cylinder assembly (5); the upper end of the joint (701) is provided with a valve seat (702); the upper end of the valve seat (702) is provided with a valve plate (703); and the outer wall of the valve seat (702) is sleeved with a pilot valve seat (704).

3. The low speed solenoid valve damper according to claim 2, characterized in that: The joint (701) is used to connect the oil storage cylinder assembly (5) and the valve seat (702); a P1 oil cavity (808) is provided on the inner wall of the pilot valve seat (704); and a flow hole is provided on the upper end surface of the valve seat (702).

4. The low speed solenoid valve damper according to claim 2, characterized in that: An O-ring is used to seal between the joint (701) and the valve seat (702). The joint (701) and the valve seat (702) are riveted, the O-ring is arranged in the middle of the riveting, and the inner wall of the joint (701) forms a P0 oil chamber (809).

5. The low speed solenoid valve damper according to claim 1, characterized in that: The solenoid valve assembly (8) comprises a sealing valve disc (801), a reflux valve seat (802), an end cap (803) and a safety valve (804); the sealing valve disc (801) is mounted on the upper end of the pilot valve seat (704); the reflux valve seat (802) is mounted on the upper end of the sealing valve disc (801); the inner wall of the upper end of the reflux valve seat (802) is connected to the end cap (803); and the upper end of the end cap (803) is connected to the safety valve (804).

6. The low speed solenoid valve damper according to claim 3, characterized in that: A P3 oil chamber (805) is formed between the return valve seat (802) and the end cap (803), P4 oil chambers (806) are formed on both sides of the return valve seat (802), and a P2 oil chamber (807) is formed at the lower end of the return valve seat (802).

7. The low speed solenoid valve damper according to claim 1, characterized in that: An A0 oil chamber (14) is formed between the separation oil cylinder (4) and the oil storage cylinder assembly (5).

8. The low speed solenoid valve damper according to claim 1, characterized in that: An A2 oil chamber (12) is formed between the working cylinder (3) and the piston rod recovery valve assembly (6).

9. The low speed solenoid valve damper according to claim 1, characterized in that: An A3 oil chamber (11) is formed between the piston rod recovery valve assembly (6) and the bottom valve (9).

10. The low speed solenoid valve damper according to claim 1, characterized in that: An A1 oil chamber (13) is provided between the working cylinder (3) and the separation oil cylinder (4).

Images