Damping adjusting device of hydraulic shock absorber
By setting an oblique oil inlet hole and a damping adjustment spring in the overflow valve body of the hydraulic shock absorber, the disturbance problem of oil pressure fluctuations on the control valve core is solved, and the reduction of liquid pressure fluctuations and the improvement of operating accuracy is achieved.
Patent Information
- Application Number
- CN202421529342.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-01
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-07-01
AI Technical Summary
In high-end vehicle models or high-precision applications, the damping adjustment device of existing hydraulic shock absorbers has the problem of hydraulic fluctuations disturbing the control valve core, resulting in inconvenient adjustment and reduced operating accuracy.
By setting three sets of oblique oil inlet holes on the intermediate valve seat plate of the overflow valve body, it is ensured that when high-speed liquid flows through the oil inlet hole, the fluid direction changes to upward, the radial flow rate impulse cancels each other, and the axial flow rate decreases, thereby reducing the pressure fluctuation of the liquid. At the same time, the redesign of the damping adjustment spring and oil inlet hole is adopted to realize the pressure regulating function of the overflow valve body.
It effectively reduces the pressure fluctuation of the liquid, reduces the impact on the control valve core, improves the operating accuracy, and is easy to disassemble and assemble, and runs smoothly.
Smart Images
Figure CN222823632U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a hydraulic shock absorber damping adjustment device, belonging to the technical field of solenoid valves. Background Art
[0002] Hydraulic shock absorbers are now standard configurations for high-end models. They use hydraulic methods to achieve shock absorption adjustment. The ECU sends shock absorption control signals according to different working conditions, so that after the hydraulic shock absorber receives the control signal, the damping adjustment device in the form of a solenoid valve is used to adjust the overflow valve to output different pressures, thereby achieving different damping requirements for the shock absorber. For example, the Chinese patent CN2024205444239 "A kind of overflow valve and shock absorption solenoid valve" declared by our company uses the electromagnetic component to drive the overflow valve to achieve the adjustment of hydraulic pressure. The core components of its pressure regulation are the valve core spring and the upper valve plate. However, according to customer experimental feedback, the upper valve plate adjustment structure has the disadvantage of inconvenient disassembly, maintenance and adjustment. To this end, our company has improved and declared the Chinese patent CN2024212146179 "A kind of shock absorber solenoid valve" to achieve upgrades and improvements by changing the upper valve plate into a spring and installing it in the electromagnetic component. However, according to customer feedback, although it is easy to disassemble and assemble, the change lacks the ability to adjust the oil pressure fluctuation at the oil inlet hole of the overflow valve body, so the oil pressure fluctuation will cause disturbances to the control valve core. For some high-end models or applications with high precision requirements, it is necessary to improve and adopt improved models. Therefore, further optimization design is needed to address the above problems. Summary of the invention
[0003] The utility model aims to overcome the above-mentioned shortcomings and provide a hydraulic shock absorber damping adjustment device with smooth operation, which improves the oil inlet hole of the overflow valve body so that the oil pressure fluctuation will not affect the control valve core.
[0004] The purpose of the utility model is achieved in this way:
[0005] A hydraulic shock absorber damping adjustment device includes an electromagnetic component and an overflow component driven by the electromagnetic component, the overflow component includes an overflow valve body, the overflow valve body has its cavity divided into an upper cavity and a lower cavity by an intermediate valve seat plate, and an oil inlet hole is arranged on the intermediate valve seat plate to connect the upper cavity and the lower cavity, at least two of the oil inlet holes are symmetrically arranged, and the oil inlet holes are arranged obliquely, and the intersection point of the central axes of the obliquely arranged oil inlet holes is located above the intermediate valve seat plate.
[0006] Preferably, the oil inlet holes are provided in three groups, and the three groups of oil inlet holes are evenly arranged around the center point on the middle valve seat plate, and the central axes of the three oil inlet holes intersect at the same point and the intersection is located above the middle valve seat plate, and the line connecting the intersection and the center point is perpendicular to the plane where the middle valve seat plate is located.
[0007] Preferably, a discharge groove is provided on the top surface of the overflow valve body and is connected to the upper chamber, an oil outlet is provided at the lower part of the overflow valve body and is connected to the lower chamber, an overflow valve core is provided in the upper chamber of the overflow valve body, the valve core spring located in the upper chamber is located between the control valve core and the intermediate valve seat plate, an overflow base is embedded on the bottom opening end of the lower chamber, the overflow valve core is slidably arranged in the lower chamber, and the overflow spring located in the lower chamber is located between the intermediate valve seat plate and the overflow valve core.
[0008] Preferably, an elastic damping element is provided between the moving iron core and the stationary iron core in the electromagnetic assembly.
[0009] Preferably, the electromagnetic assembly includes a valve cavity formed by a valve seat, a magnetic isolation ring and an upper valve body, the coil assembly is embedded in the valve seat, the static iron core is embedded in the bottom of the valve cavity, the moving iron core is slidably arranged in the valve cavity, and the push rod connected to the moving iron core passes through the static iron core and abuts against the upper surface of the control valve core, and the elastic damping element is located between the moving iron core and the static iron core.
[0010] Preferably, the elastic damping element is a damping adjustment spring located in the valve cavity and sleeved on the push rod, and the damping adjustment spring is located between the moving iron core and the static iron core.
[0011] Preferably, the damping adjustment spring is a cylindrical helical spring.
[0012] Preferably, a gasket is provided on the upper surface of the static iron core, and the gasket is located between the damping adjustment spring and the static iron core.
[0013] Compared with the prior art, the beneficial effects of the utility model are:
[0014] When the utility model is working, when high-speed liquid flows through the three obliquely arranged oil inlet holes on the overflow valve body, it flows in from the lower ends of the symmetrical oblique holes of the three oil inlet holes, flows out obliquely at the upper end outlet, and changes the direction of the fluid to upward after merging; since the high-speed liquid obliquely intersects at the outlets of the three oblique holes, the radial flow velocity impulses cancel each other out, and the axial flow velocity is greatly reduced compared with the original flow velocity, thereby greatly reducing the pressure fluctuation of the liquid, ensuring the operating accuracy of the control valve core.
[0015] At the same time, the damping adjustment spring provides damping adjustment capability. Through the redesign of the damping adjustment spring and the oil inlet hole, it can not only realize the pressure adjustment function of the upper valve plate in the original design, but also bring the advantages of easy disassembly and assembly and smooth operation. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 The utility model is a structural schematic diagram of a hydraulic shock absorber damping adjustment device.
[0017] Figure 2 It is a structural schematic diagram of the overflow valve body in the utility model.
[0018] Figure 3 For this utility model Figure 2 Top view of the .
[0019] Figure 4 For this utility model Figure 2 3D rendering (arrows indicate the direction of flow of liquid when it is ejected through the oil outlet).
[0020] Figure 5 This is a throttling diagram of the control valve core and the overflow valve body in the utility model.
[0021] Figure 6 This is a schematic diagram of a hydraulic shock absorber damping adjustment device of the utility model when the control valve core is in a closed state.
[0022] in:
[0023] Valve seat 1, magnetic isolation ring 2, upper valve body 3, coil assembly 4, moving iron core 5, push rod 6, static iron core 7, damping adjustment spring 8, gasket 9;
[0024] Overflow valve body 10, overflow valve core 11, overflow base 12, overflow spring 13, control valve core 14, valve core spring 15;
[0025] Drain groove 10.1, oil inlet hole 10.2, oil outlet 10.3, middle valve seat plate 10.4. DETAILED DESCRIPTION
[0026] See also Figures 1 to 6 The utility model relates to a hydraulic shock absorber damping adjustment device, comprising an electromagnetic component and an overflow component driven by the electromagnetic component, wherein the overflow component comprises an overflow valve body 10, wherein the overflow valve body 10 is divided into an upper cavity and a lower cavity by an intermediate valve seat plate 10.4, and an oil inlet hole 10.2 is provided on the intermediate valve seat plate 10.4 to connect the upper cavity and the lower cavity, and the oil inlet hole 10.2 is provided in three groups, and the three groups of oil inlet holes 10.2 are evenly arranged in a circular shape on the intermediate valve seat plate 10.4, that is, The angle between the line connecting two adjacent oil inlet holes 10.2 and the center of the circle on the intermediate valve seat plate 10.4 is 120°, and the oil inlet holes 10.2 are arranged obliquely, and the oil inlet holes 10.2 are inclined upward from the lower end to the upper end, and are inclined toward the center, that is, the central axes of the three oil inlet holes 10.2 intersect at the same point, and the intersection of the central axes of the three oil inlet holes 10.2 and the line connecting the three oil inlet holes 10.2 around the center of the circle on the intermediate valve seat plate 10.4 are perpendicular to the plane where the intermediate valve seat plate 10.4 is located. As a result, when the high-speed oil flows in through the lower end of the oil inlet hole 10.2 and ejects from the upper end, they converge at the same place. At this time, due to the symmetrical radial flow velocity impulses offset each other, the pressure fluctuation of the liquid is greatly reduced, reducing the impact on the control valve core 14 in the upper cavity.
[0027] The overflow valve core 11 is arranged in the upper cavity of the overflow valve body 10, the valve core spring 15 in the upper cavity is located between the control valve core 14 and the intermediate valve seat plate 10.4, the overflow base 12 is embedded on the bottom opening end of the lower cavity, the overflow valve core 11 is slidably arranged in the lower cavity, and the overflow spring 13 in the lower cavity is located between the intermediate valve seat plate 10.4 and the overflow valve core 11, and a drain groove 10.1 is arranged on the top surface of the top of the overflow valve body 10 to communicate with the upper cavity, and an oil outlet 10.3 is arranged at the bottom of the overflow valve body 10 to communicate with the lower cavity. Specifically: the control valve core 14 and the overflow valve body 11 form a plane valve port to form an annular throttling area S, and different inner hole diameters D of the control valve core 14 form different annular throttling areas S, thereby controlling different throttling characteristics.
[0028] Furthermore, the electromagnetic assembly includes a valve cavity formed by a valve seat 1, a magnetic isolation ring 2 and an upper valve body 3, the coil assembly 4 is embedded in the valve seat 1, the static iron core 7 is embedded in the bottom of the valve cavity, the moving iron core 5 is slidably arranged in the valve cavity, and the push rod 6 connected to the moving iron core 5 passes through the static iron core 7 and abuts against the upper surface of the control valve core 14, the damping adjustment spring 8 located in the valve cavity is sleeved on the push rod 6 (the damping adjustment spring 8 is a cylindrical coil spring), and the damping adjustment spring 8 is located between the moving iron core 5 and the static iron core 7, further, a gasket 9 is padded on the static iron core 7, and the gasket 9 is located between the damping adjustment spring 8 and the static iron core 7, so that different damping characteristics are achieved through the damping adjustment spring 8.
[0029] In addition: It should be noted that the above specific implementation is only an optimization scheme of this patent. Any changes or improvements made by technicians in this field based on the above concept are within the scope of protection of this patent.
Claims
1. A hydraulic shock absorber damping adjustment device, comprising an electromagnetic component and an overflow component driven by the electromagnetic component, wherein the overflow component comprises an overflow valve body (10), wherein the overflow valve body (10) is divided into an upper chamber and a lower chamber by an intermediate valve seat plate (10.4), and an oil inlet hole (10.2) is provided on the intermediate valve seat plate (10.4) to connect the upper chamber and the lower chamber, and characterized in that: At least two of the oil inlet holes (10.2) are symmetrically arranged, and the oil inlet holes (10.2) are arranged obliquely, and the intersection point of the central axes of the obliquely arranged oil inlet holes (10.2) is located above the middle valve seat plate (10.4).
2. A hydraulic shock absorber damping adjustment device according to claim 1, characterized in that: The oil inlet holes (10.2) are provided in three groups, and the three groups of oil inlet holes (10.2) are evenly arranged around a center point on the middle valve seat plate (10.4), and the center axes of the three oil inlet holes (10.2) intersect at the same point and the intersection is located above the middle valve seat plate (10.4), and the line connecting the intersection and the center point is perpendicular to the plane where the middle valve seat plate (10.4) is located.
3. A hydraulic shock absorber damping adjustment device according to claim 1 or 2, characterized in that: A drain groove (10.1) is provided on the top surface of the overflow valve body (10) and is connected to the upper chamber. An oil outlet (10.3) is provided on the lower part of the overflow valve body (10) and is connected to the lower chamber. An overflow valve core (11) is provided in the upper chamber of the overflow valve body (10). A valve core spring (15) located in the upper chamber is located between the control valve core (14) and the intermediate valve seat plate (10.4). An overflow base (12) is embedded in the bottom opening end of the lower chamber. The overflow valve core (11) is slidably arranged in the lower chamber, and the overflow spring (13) located in the lower chamber is located between the intermediate valve seat plate (10.4) and the overflow valve core (11).
4. A hydraulic shock absorber damping adjustment device according to claim 1 or 2, characterized in that: An elastic damping element is provided between the moving iron core (5) and the stationary iron core (7) in the electromagnetic assembly.
5. The damping adjustment device for a hydraulic shock absorber according to claim 3, characterized in that: The electromagnetic assembly comprises a valve cavity formed by a valve seat (1), a magnetic isolation ring (2) and an upper valve body (3); the coil assembly (4) is embedded in the valve seat (1); the static iron core (7) is embedded in the bottom of the valve cavity; the moving iron core (5) is slidably arranged in the valve cavity; a push rod (6) connected to the moving iron core (5) passes through the static iron core (7) and abuts against the upper surface of the control valve core (14); and an elastic damping element is located between the moving iron core (5) and the static iron core (7).
6. A hydraulic shock absorber damping adjustment device according to claim 4, characterized in that: The elastic damping element is a damping adjustment spring (8) located in the valve cavity and sleeved on the push rod (6); the damping adjustment spring (8) is located between the moving iron core (5) and the stationary iron core (7).
7. A hydraulic shock absorber damping adjustment device according to claim 6, characterized in that: The damping adjustment spring (8) is a cylindrical helical spring.
8. The hydraulic shock absorber damping adjustment device according to claim 5, characterized in that: A gasket (9) is provided on the upper surface of the static iron core (7), and the gasket (9) is located between the damping adjustment spring (8) and the static iron core (7).