Solenoid valve seat, solenoid valve assembly and active damper

Abstract

This utility model discloses an electromagnetic valve seat, including a through cavity formed vertically, with a sealing mounting portion formed by an inwardly protruding inner wall in the middle of the through cavity, and an electromagnetic valve through hole communicating with the through cavity in the radial direction; the two electromagnetic valve through holes are located above and below the sealing mounting portion, respectively; a first connecting hole extends radially outward from the top of the through cavity, and a second connecting hole extends radially outward from the bottom of the through cavity. This utility model also discloses an electromagnetic valve assembly using an electromagnetic valve seat, and an active vibration damper. The beneficial effects of this utility model are: the electromagnetic valve seat no longer occupies space in the vertical direction, the height of the working cylinder chamber is not affected, the compression and recovery strokes better meet actual needs, more design space can be given to the piston rod to meet the maximum tension and compression requirements, the versatility of the structure is improved, and development costs are reduced indirectly.

Description

Technical Field

[0001] This utility model relates to the field of automotive shock absorber technology, and more particularly to an electromagnetic valve seat and an active shock absorber. Background Technology

[0002] Electronically controlled shock absorbers, hereinafter referred to as shock absorbers, are an indispensable component of the suspension system. Their main working principle is that, under the combined action of solenoid valves and a set passive adjustable valve system, they respond to different excitations input from the road surface, thereby adjusting the required damping force value to meet the vibration reduction needs under various road conditions.

[0003] However, because the damper mode under passive suspension passively receives road input before adjusting and calculating to dampen, the response time from input to reaction at high speeds is relatively insufficient. Furthermore, the high-pressure gas inside is prone to mixing with the oil, causing cavitation, making it difficult to provide a damping force value that perfectly matches the road excitation. At the same time, because it is a passive mode, the vehicle height cannot be actively controlled, making it difficult to cope with certain special working conditions. Therefore, in order to meet people's growing demand for comfort and safety, fully active suspension systems have begun to appear on the market to improve functionality.

[0004] In current fully active suspension systems, such as CN11190845119A - an active hydraulic suspension shock absorber, the shock absorber part often uses a single, highly integrated valve block as the core, extending upwards to the oil passage chamber. However, this design often affects the height of the working cylinder chamber due to the volume requirements of the valve block, thus limiting the compression and extension strokes. Since the design of the shock absorber has many requirements, such as the length-to-diameter ratio of the piston rod, if the highly integrated valve block occupies the dimension in the height direction, then the length of the piston rod must be reduced, which leads to an adaptive change in the outer diameter of the piston rod. Ultimately, this results in a decrease in the shear resistance of the piston rod. Therefore, the piston rod design is limited and not conducive to versatility.

[0005] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0006] The technical problem to be solved by this utility model is: how to solve the problem that the valve seat structure and position of the current shock absorber are unreasonable, resulting in insufficient height of the working cylinder chamber and reduced piston rod performance.

[0007] This utility model solves the above-mentioned technical problems through the following technical means:

[0008] The solenoid valve seat includes a through cavity formed vertically, with the inner wall of the middle part of the through cavity protruding inward to form a sealing mounting part, and a solenoid valve through hole communicating with the through cavity in the radial direction; the two solenoid valve through holes are located above and below the sealing mounting part, respectively; a first connecting hole is formed radially outward at the top of the through cavity, and a second connecting hole is formed radially outward at the bottom of the through cavity.

[0009] In this invention, because the electromagnetic valve seat is installed through the middle, the electromagnetic valve seat no longer occupies space in the height direction, the height of the working cylinder chamber is not affected, the compression and recovery strokes can better meet the actual needs, more design space can be given to the piston rod to meet the needs of maximum tension and compression, the versatility of the structure is improved, and the development cost is reduced in a disguised way.

[0010] Preferably, a sealing ring mounting groove is also provided on the inner wall of the sealing installation part.

[0011] The solenoid valve seat integrates a sealing ring mounting groove, which allows for a simple and reliable separation of the compression and recovery chambers.

[0012] Preferably, the top of the solenoid valve seat is a cylindrical structure, and a spring disc connection slot is formed on the outer wall of the cylindrical structure.

[0013] The spring disc connection slot is used to connect the spring disc of the air spring. Integrating the spring disc into the solenoid valve seat reduces the cost of separate development and enhances the stability of the fit.

[0014] Preferably, the through cavity also includes an oil injection hole communicating with the through cavity in the radial direction. The two oil injection holes are located above and below the sealing mounting part, respectively. The oil injection hole located on the same side of the sealing mounting part is communicating with the solenoid valve through hole.

[0015] The solenoid valve assembly includes the aforementioned solenoid valve seat, solenoid valve, and passive valve system; the passive valve system and the solenoid valve are sealed within the solenoid valve through-hole.

[0016] Preferably, it also includes an oil injection connector, a hydraulic connector, and an exhaust valve connected to the solenoid valve seat; the oil injection connector is connected to the oil injection hole on the solenoid valve seat, the hydraulic connector is connected to the solenoid valve through hole, and the exhaust valve is connected to the through cavity.

[0017] An active vibration damper includes a solenoid valve assembly, a working cylinder, an upper oil reservoir, and a lower oil reservoir. The working cylinder passes through a through cavity and is sealed and connected to a sealing mounting part, which is located in the middle or lower middle part of the working cylinder. The upper oil reservoir is located outside the upper part of the working cylinder, and its bottom end is sealed and connected to a first connecting hole. The lower oil reservoir is located outside the lower part of the working cylinder, and its top end is sealed and connected to a second connecting hole.

[0018] Preferably, it also includes a piston assembly, which includes a sealing piston and a piston rod. The sealing piston is connected to the bottom end of the piston rod and is movably and sealingly connected to the inner wall of the working cylinder.

[0019] Preferably, it also includes a guide and a bottom valve. The top of the working cylinder is interference-fitted with the bottom protrusion of the guide, and the bottom of the working cylinder is interference-fitted with the top protrusion of the bottom valve. The guide is provided with an oil passage. The oil in the upper oil reservoir is connected to the upper cavity of the working cylinder through the guide. The bottom valve is provided with an oil passage. The oil in the lower oil reservoir is connected to the lower cavity of the working cylinder through the bottom valve.

[0020] Preferably, it also includes an upper end cover and a lower end cover, the upper end cover being sealed to the top of the upper oil reservoir; the lower end cover being sealed to the bottom of the lower oil reservoir; the top surface of the lower end cover has a frustum-shaped groove, the bottom end of the bottom valve has a frustum-shaped structure, and the frustum-shaped groove is adapted to the frustum-shaped structure.

[0021] The frustum-shaped slot is compatible with the frustum-shaped structure and has guiding properties. After the working cylinder is inserted into the sealing installation part, it improves the problem that the O-ring seal is easily cut during installation.

[0022] The advantages of this utility model are:

[0023] In this invention, because the electromagnetic valve seat is installed through the middle, the electromagnetic valve seat no longer occupies space in the height direction, the height of the working cylinder chamber is not affected, the compression and recovery strokes can better meet the actual needs, more design space can be given to the piston rod to meet the needs of maximum tension and compression, the versatility of the structure is improved, and the development cost is reduced in a disguised way. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the solenoid valve assembly according to an embodiment of the present invention;

[0025] Figure 2 This is a bottom view of the active vibration damper according to an embodiment of the present invention;

[0026] Figure 3 yes Figure 2 Sectional view of AA;

[0027] Figure 4 yes Figure 3 Enlarged view at point B in the middle;

[0028] Figure 5 This is a schematic diagram of the structure of the active vibration damper according to an embodiment of the present invention;

[0029] Numbering on the map:

[0030] 1. Solenoid valve assembly; 11. Solenoid valve seat; 111. Through cavity; 112. Sealing mounting part; 113. Solenoid valve through hole; 114. Oil filling hole; 115. First connecting hole; 116. Second connecting hole; 117. Spring disc connecting slot; 118. Spring disc; 12. Solenoid valve; 13. Passive valve system; 14. Oil filling connector; 15. Hydraulic connector; 16. Exhaust valve;

[0031] 2. Working cylinder; 21. Upper chamber of working cylinder; 22. Lower chamber of working cylinder;

[0032] 3. Upper oil storage tank; 31. Upper oil storage cavity;

[0033] 4. Lower oil storage tank; 41. Lower oil storage chamber;

[0034] 5. Piston assembly; 51. Sealed piston; 52. Piston rod;

[0035] 6. Guide;

[0036] 7. Bottom valve;

[0037] 8. Top cover;

[0038] 9. Lower end cap. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0040] Example 1:

[0041] like Figure 1As shown, the solenoid valve seat 11 is an integral structure, extending vertically to form a through cavity 111. A sealing mounting portion 112 protrudes inward from the center of the through cavity 111. Two solenoid valve through holes 113 are also included in the radial direction of the through cavity 111, communicating with the through cavity 111. Two oil injection holes 114 are also included in the radial direction of the through cavity 111, communicating with the through cavity 111. One solenoid valve through hole 113 and one oil injection hole 114 are located above the sealing mounting portion 112, while the other solenoid valve through hole 113 and the other oil injection hole 114 are located below the sealing mounting portion 112. A first connecting hole 115 extends radially outward from the top of the through cavity 111, and a second connecting hole 116 extends radially outward from the bottom of the through cavity 111, such that the inner diameter of the sealing mounting portion 112 is smaller than the inner diameter of both the first connecting hole 115 and the second connecting hole 116.

[0042] The radial outward extension of the through cavity 111 means that the through cavity 111 extends along... Figure 1 The horizontal direction expands outward as shown, making the inner diameter of the hole larger, thereby forming the first connecting hole 115 and the second connecting hole 116.

[0043] In this embodiment, the central through cavity 111 of the solenoid valve seat 11 is used to connect with the cylinder assembly of the active damper. The cylinder assembly passes through the entire through cavity 111, and the solenoid valve seat 11 is located in the middle or lower part of the cylinder assembly.

[0044] Combination Figure 2 As shown, a sealing ring mounting groove is also provided on the inner wall of the sealing mounting part 112, and a sealing ring is connected in the sealing ring mounting groove. The sealing mounting part 112 and the outer wall of the working cylinder 2 in the cylinder assembly achieve a sealed connection. The sealing ring mounting groove is integrated on the solenoid valve seat 11, which makes it easy and reliable to separate the compression and recovery chambers.

[0045] The first connecting hole 115 is sealed to the bottom end of the upper oil storage cylinder 3. Specifically, the bottom end of the upper oil storage cylinder 3 is supported on the stepped surface at the bottom of the first connecting hole 115. The upper oil storage cylinder 3 is inserted into the first connecting hole 115 and then welded.

[0046] The second connecting hole 116 is sealed to the top end of the lower oil reservoir 4. Specifically, the top end of the lower oil reservoir 4 is limited to the stepped surface at the top end of the second connecting hole 116, and the lower oil reservoir 4 is welded after being inserted into the second connecting hole 116.

[0047] Since the inner diameter of the sealing mounting part 112 is smaller than the inner diameter of the first connecting hole 115 and the inner diameter of the sealing mounting part 112 is smaller than the inner diameter of the second connecting hole 116, an upper oil storage chamber 31 is formed between the upper oil storage cylinder 3 and the working cylinder 2, and a lower oil storage chamber 41 is formed between the lower oil storage cylinder 4 and the working cylinder 2.

[0048] Combination Figure 3 , Figure 4 , Figure 5 As shown, the solenoid valve through-hole 113 is used to install the solenoid valve 12 and the passive valve system 13. The passive valve system 13 is press-fitted onto the step inside the opening of the solenoid valve 12, achieving a sealed connection between the passive valve system 13 and the solenoid valve 12. The solenoid valve 12 is sealed inside the solenoid valve seat 11 by a cover plate. On the side wall of the solenoid valve 12, the solenoid valve seat 11 is also connected to a hydraulic connector 15, which can be connected to an external electro-hydraulic pump or an accumulator.

[0049] The oil filling hole 114 is used to install the oil filling connector 14. The solenoid valve seat 11 is also connected to the vent valve 16.

[0050] In this embodiment, the solenoid valve 12, passive valve system 13, oil filling connector 14, hydraulic connector 15, and exhaust valve 16 are purchased parts. The appropriate specifications can be selected and assembled according to the required installation hole diameters such as the solenoid valve through hole 113 and oil filling hole 114.

[0051] like Figure 1 , Figure 5 As shown, the top of the solenoid valve seat 11 is a thin-walled cylindrical structure, and its outer wall is also provided with a spring disc connection slot 117. The spring disc connection slot 117 is an annular groove used to connect the spring disc 118 of the air spring. The spring disc 118 is integrated into the solenoid valve seat 11, which reduces the cost of separate development and enhances the stability of the fit.

[0052] The dimensions and external shape of the internal channel of the solenoid valve seat 11 can be designed and moderately deformed according to specific circumstances, but the through-hole design in the middle will not be changed.

[0053] In this embodiment, because the solenoid valve seat 11 is centrally located, it no longer occupies space in the height direction, and the height of the working cylinder chamber is unaffected. This allows the compression and recovery strokes to better meet actual needs, providing more design space for the piston rod 52 to meet maximum tension and compression requirements. This improves the structural versatility and indirectly reduces development costs. It also allows similar projects to directly modify the position of the piston rod 52's limiting ring to achieve a certain degree of standardization.

[0054] Example 2:

[0055] The solenoid valve assembly 1 includes the solenoid valve seat 11, solenoid valve 12, passive valve system 13, oil injection connector 14, hydraulic connector 15, and exhaust valve 16 as described in Embodiment 1 above.

[0056] Solenoid valve 12 and passive valve system 13 are horizontally installed in solenoid valve through hole 113. Passive valve system 13 is press-fitted onto the step inside the opening of solenoid valve 12. Passive valve system 13 and solenoid valve 12 are sealed together. The right end of solenoid valve 12 is sealed inside solenoid valve seat 11 by cover plate.

[0057] The oil filling connector 14 is connected to the oil filling hole 114. The hydraulic connector 15 is connected to the solenoid valve seat 11 and communicates with the internal through cavity 111. The hydraulic connector 15 is connected to an external hydraulic pump.

[0058] The upper solenoid valve assembly 1 controls the flow rate of oil in the upper chamber 21 and upper oil reservoir 31 of the working cylinder, thereby controlling the damping force. The lower solenoid valve assembly 1 controls the flow rate of oil in the lower chamber 22 and lower oil reservoir 41 of the working cylinder, thereby controlling the damping force.

[0059] Both the exhaust valve 16 and the oil filling connector 14 function during vehicle installation to facilitate oil filling during the trial production phase, and do not involve the shock absorber function during normal driving. Meanwhile, this embodiment does not exclude other devices or designs that can balance pressure differentials, fluid levels, and provide active power control.

[0060] In this embodiment, a through cavity 111 is provided on the solenoid valve assembly 1, which allows the solenoid valve assembly 1 to be arranged in the middle or lower middle part of the shock absorber, avoiding occupying the height of the working cylinder 2. At the same time, components such as the solenoid valve 12 are integrated on the solenoid valve seat 11, which has a high degree of integration and is also easy to install.

[0061] Example 3:

[0062] The active vibration damper includes the solenoid valve assembly 1, working cylinder 2, upper oil reservoir 3, lower oil reservoir 4, piston assembly 5, guide 6, bottom valve 7, upper end cover 8, and lower end cover 9 as described in Embodiment 2 above.

[0063] The solenoid valve assembly 1 is connected to the middle or lower middle part of the working cylinder 2. The lower middle part here does not include the bottom. The solenoid valve assembly 1 does not occupy the working height of the working chamber.

[0064] The working cylinder 2 passes through the through cavity 111 in the solenoid valve assembly 1 and is sealed to the sealing mounting part 112 by a sealing ring. The top end of the working cylinder 2 is interference-fitted with the bottom protrusion of the guide 6, and the bottom end of the working cylinder 2 is interference-fitted with the top protrusion of the bottom valve 7. The piston assembly 5 is connected inside the working cylinder 2.

[0065] The piston assembly 5 includes a sealing piston 51 and a piston rod 52. The sealing piston 51 is connected to the inner wall of the working rod 2 by a sealing ring. The sealing piston 51 is connected to the bottom of the piston rod 52. The top end of the piston rod 52 extends to the outside through the guide 6 and the upper end cover 8.

[0066] The sealing piston 51 divides the working cylinder 2 into two chambers: the upper chamber 21 is located above the sealing piston 51, and the lower chamber 22 is located below the sealing piston 51.

[0067] The first connecting hole 115 is sealed to the bottom end of the upper oil reservoir 3, and the top end of the upper oil reservoir 3 is sealed to the top end cover 8. The top end of the upper oil reservoir 3 is flanged and pressed onto the oil seal, thus isolating the internal upper oil reservoir 31 and the upper cavity 21 of the working cylinder from the outside. The upper oil reservoir 3 is located outside the working cylinder 2 and is arranged coaxially.

[0068] The second connecting hole 116 is sealed to the top end of the lower oil reservoir 4, and the bottom end of the lower oil reservoir 4 is sealed to the lower end cover 9. The lower oil reservoir 4 is located outside the working cylinder 2 and is arranged coaxially.

[0069] The guide valve 6 has an oil passage, and the upper oil storage chamber 31 is connected to the upper chamber 21 of the working cylinder through the oil passage of the guide valve 6. The upper oil storage chamber 31 is also connected to the solenoid valve assembly 1 located above. The bottom valve 7 has an oil passage, and the lower oil storage chamber 41 is connected to the lower chamber 22 of the working cylinder through the oil passage of the bottom valve 7. The lower oil storage chamber 41 is also connected to the solenoid valve assembly 1' located below.

[0070] In this embodiment, the bottom of the bottom valve 7 is provided with a frustum-shaped structure, and the top of the lower end cover 9 is provided with a frustum-shaped groove that matches it. The frustum surface of the bottom valve 7 is matched and connected with the frustum-shaped groove of the lower end cover 9, which has a guiding function. After the working cylinder 2 is inserted into the sealing installation part 112, the problem of the O-ring being easily cut during the installation process is improved.

[0071] The working process of this embodiment:

[0072] When the piston rod 52 moves downward, the oil in the lower chamber 22 of the working cylinder flows through the oil passage on the bottom valve 7 to the lower oil storage chamber 41, and then enters the lower solenoid valve assembly 1'. The solenoid valve assembly 1' is connected to an external hydraulic pump through the hydraulic connector 15, and the damping force is adjusted by regulating the oil flow rate. When the piston rod 52 moves upward, the oil in the upper chamber 21 of the working cylinder flows through the oil passage on the guide 6 to the upper oil storage chamber 31, and then enters the upper solenoid valve assembly 1. The solenoid valve assembly 1 is connected to an external hydraulic pump through the hydraulic connector 15, and the damping force is adjusted by regulating the oil flow rate.

[0073] It should be noted that existing designs such as a recovery buffer structure and a limiting ring can be added to the piston rod 52 of the active damper, which do not affect the use of this embodiment.

[0074] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A solenoid valve seat, characterized in that, It includes a through cavity formed vertically, with the inner wall of the through cavity protruding inward to form a sealing mounting part, and a solenoid valve through hole communicating with the through cavity in the radial direction; the two solenoid valve through holes are located above and below the sealing mounting part, respectively; a first connecting hole is formed radially outward at the top of the through cavity, and a second connecting hole is formed radially outward at the bottom of the through cavity.

2. The electromagnetic valve seat according to claim 1, characterized in that, A sealing ring mounting groove is also provided on the inner wall of the sealing installation part.

3. The electromagnetic valve seat according to claim 1, characterized in that, The top of the solenoid valve seat is a cylindrical structure, and a spring disc connection slot is opened on the outer wall of the cylindrical structure.

4. The electromagnetic valve seat according to claim 1, characterized in that, Along the radial direction of the through cavity, there is also an oil injection hole communicating with the through cavity. The two oil injection holes are located above and below the sealing mounting part, respectively. The oil injection hole located on the same side of the sealing mounting part is connected to the solenoid valve through hole.

5. A solenoid valve assembly, characterized in that, Includes the solenoid valve seat, solenoid valve, and passive valve system as described in any one of claims 1-4; the passive valve system and the solenoid valve are sealed within the solenoid valve through-hole.

6. The solenoid valve assembly according to claim 5, characterized in that, It also includes an oil injection connector, a hydraulic connector, and an exhaust valve connected to the solenoid valve seat; the oil injection connector is connected to the oil injection hole on the solenoid valve seat, the hydraulic connector is connected to the solenoid valve through hole, and the exhaust valve is connected to the through cavity.

7. An active vibration damper, characterized in that, The device includes the solenoid valve assembly, working cylinder, upper oil reservoir, and lower oil reservoir as described in claim 5 or 6 above; the working cylinder passes through the through cavity and is sealed and connected to the sealing installation part, the sealing installation part is located in the middle or lower middle part of the working cylinder, the upper oil reservoir is located outside the upper part of the working cylinder, the bottom end of the upper oil reservoir is sealed and connected to the first connecting hole, the lower oil reservoir is located outside the lower part of the working cylinder, and the top end of the lower oil reservoir is sealed and connected to the second connecting hole.

8. The active vibration damper according to claim 7, characterized in that, It also includes a piston assembly, which includes a sealing piston and a piston rod. The sealing piston is connected to the bottom end of the piston rod and is movably and sealingly connected to the inner wall of the working cylinder.

9. The active vibration damper according to claim 8, characterized in that, It also includes a guide and a bottom valve. The top of the working cylinder is interference-fitted with the bottom protrusion of the guide, and the bottom of the working cylinder is interference-fitted with the top protrusion of the bottom valve. The guide is provided with an oil passage. The oil in the upper oil reservoir is connected to the upper cavity of the working cylinder through the guide. The bottom valve is provided with an oil passage. The oil in the lower oil reservoir is connected to the lower cavity of the working cylinder through the bottom valve.

10. The active vibration damper according to claim 9, characterized in that, It also includes an upper end cover and a lower end cover. The upper end cover is sealed to the top of the upper oil reservoir; the lower end cover is sealed to the bottom of the lower oil reservoir; the top surface of the lower end cover has a frustum-shaped groove, and the bottom end of the bottom valve has a frustum-shaped structure, with the frustum-shaped groove matching the frustum-shaped structure.

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