Direct proportion electromagnetic valve assembly for shock absorber

Abstract

The direct proportion electromagnetic valve assembly comprises an upper magnetism isolating sleeve, a lower magnetism isolating sleeve, a preceding stage valve and a main stage valve, a movable iron assembly and a movable iron base are arranged in the upper magnetism isolating sleeve, one end of the lower magnetism isolating sleeve is matched with the upper magnetism isolating sleeve to form a preceding stage cavity, and the preceding stage valve floats in the preceding stage cavity. The movable iron seat is installed in the upper magnetism isolating sleeve in a close fit mode, the lower magnetism isolating sleeve is provided with a first circulation channel which linearly penetrates through the lower magnetism isolating sleeve, the valve ring seat is provided with a second circulation channel which is communicated with the first circulation channel, and the second circulation channel is communicated with the second circulation channel. A preceding-stage channel for communicating the preceding-stage cavity with the first circulation channel is arranged between the upper magnetism isolating sleeve and the lower magnetism isolating sleeve, and an original complex and zigzag first circulation channel machining mode can be changed into a linear through hole, so that the machining process is simplified, and the machining difficulty is reduced; and meanwhile, the problem that damping circulation is unstable due to burrs caused by complex runner design is solved.

Description

Technical Field

[0001] The utility model relates to the field of shock absorbers, in particular to a proportional solenoid valve assembly for shock absorbers. Background Art

[0002] Traditional shock absorbers have fixed characteristics and provide fixed damping characteristic curves during extension or compression, while adjustable shock absorbers provide a characteristic field. The system selects different damping in the field in a timely manner according to the working conditions (road conditions, braking, acceleration, turning, driver's wishes, etc.) to curb body vibration, prevent tires from bouncing, and maintain body stability. Variable damping shock absorbers are mainly realized through magnetorheological, solenoid valve, stepper motor and other methods. Solenoid valve type is widely used for its reliable performance, low cost, quick response, compact structure and other advantages.

[0003] Solenoid valve type variable damping shock absorbers are being used more and more widely at home and abroad. They are mainly controlled by actuators to control the front-stage valve, thereby setting the pressure in the control chamber. The control pressure applies a closing force to the main-stage valve. The front-stage valve can be used to control very large adjustment forces or closing forces with low energy input. By using the front-stage valve and the main-stage valve and, if necessary, a series connection with a traditional solenoid valve as part of the solenoid valve device, the characteristic curve characteristics can be greatly influenced.

[0004] The existing Chinese invention patent with publication number CN118912138A discloses an electromagnetic damping valve device for a shock absorber. By setting the magnetic isolation sleeve separately and simplifying the original press-fitting process into multiple loose-fitting part modules, it can be easily assembled and is convenient for the subsequent automated assembly line. By changing the moving iron originally guided by the internal sleeve to an integrated moving iron core, the upper magnetic isolation sleeve is used for external guidance, and the double spring structure that needs to be set in series at both ends of the moving iron core is changed to a single spring to adjust the preload force, thereby reducing the fluctuation range and improving stability. The original sleeve is replaced by a Teflon film to reduce the friction caused by the tilt of the moving iron core when it is working. Through the above modularized parts, the entire process is installed through the threaded connection of the lower magnetic isolation sleeve, which reduces the processing accuracy requirements, avoids tolerance superposition, and avoids the process that originally required a press to perform tight fitting, thereby achieving convenient assembly, reducing costs, and improving assembly efficiency.

[0005] However, the above technical solution still has the following disadvantages in actual use:

[0006] 1. In this technical solution, the first flow channel 74 connected to the front stage cavity 701 needs to be opened in the lower magnetic isolation sleeve 7. However, due to the limitation of the first limit portion 72, the processing of the entire first flow channel 74 that requires multi-section conduction is very difficult. At the same time, burrs will remain between the multi-section connecting holes of the first flow channel 74, affecting the adjustment accuracy of the damping.

[0007] 2. In this technical solution, the intersection of the first circulation channel 74 and the second circulation channel 84 at the lower magnetic isolation sleeve 7 has a right-angle design and the oil storage space is too small, which causes impact when the first circulation channel 74 enters the second circulation channel 84, causing oil turbulence. The turbulence will cause the oil flow to be unstable, causing the oil flow and pressure through the damping valve to fluctuate, which directly affects the damping force adjustment accuracy of the shock absorber, resulting in the inability to accurately control the damping force, thereby affecting the vehicle's shock absorption performance and ride comfort. Utility Model Content

[0008] The technical problem to be solved by the utility model is to provide a proportional solenoid valve assembly for a shock absorber in view of the deficiencies of the above-mentioned prior art.

[0009] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a proportional solenoid valve assembly for a shock absorber, comprising an upper magnetic isolation sleeve, a lower magnetic isolation sleeve, a front-stage valve and a main-stage valve, wherein the upper magnetic isolation sleeve is detachably connected to the lower magnetic isolation sleeve, a moving iron assembly connected to the front-stage valve and a moving iron seat arranged at the front end of the moving iron assembly are arranged in the upper magnetic isolation sleeve, the main-stage valve is movably installed in the lower magnetic isolation sleeve, and after passing through the lower magnetic isolation sleeve, it is abutted against the front-stage valve, and a valve is arranged at the bottom of the lower magnetic isolation sleeve. Ring seat, one end of the lower magnetic isolation sleeve cooperates with the upper magnetic isolation sleeve to form a front-stage cavity for the front-stage valve to float inside, and the other end cooperates with the valve ring seat to form a main-stage cavity for the main-stage valve to move inside, the moving iron seat is tightly installed in the upper magnetic isolation sleeve, the lower magnetic isolation sleeve is provided with a first flow channel that straightly passes through the lower magnetic isolation sleeve, the valve ring seat is provided with a second flow channel that is connected to the first flow channel, and a front-stage channel that connects the front-stage cavity with the first flow channel is provided between the upper and lower magnetic isolation sleeves.

[0010] By adopting the above technical scheme, compared with the prior art, the structure of the lower magnetic isolation sleeve is changed so that the moving iron seat is directly and tightly installed on the upper magnetic isolation sleeve, so that the lower magnetic isolation sleeve does not need to be against the moving iron seat, and the first limiting portion is deleted, so that the original complex and tortuous first circulation channel processing method can be changed to a straight through hole, which simplifies the processing technology and reduces the processing difficulty. At the same time, it avoids the problem of unstable damping circulation caused by burrs caused by complex flow channel design, optimizes the flow path of the oil, reduces the resistance and impact of the oil during the flow process, improves the throttling effect and the stability of the damping force, and allows the damping fluid in the front stage chamber to stably enter the first circulation channel through the front stage channel.

[0011] The above-mentioned proportional solenoid valve assembly for a shock absorber can be further configured as follows: a step ring seat is provided at a position of the upper magnetic isolation sleeve corresponding to the first flow channel, and the inner wall of the step ring seat forms an arc angle.

[0012] By adopting the above technical solution, the step ring seat provides a clear structural boundary for the first circulation channel, ensuring that the oil can transition smoothly when passing through the first circulation channel. The arc angle of the inner wall can effectively reduce the impact and turbulence of the oil during the flow process, avoiding the impact and turbulence caused by the original right-angle design, which leads to unstable oil flow, increased energy loss and noise.

[0013] The above-mentioned proportional solenoid valve assembly for a shock absorber can be further configured as follows: an annular protrusion extends from one end of the lower magnetic isolation sleeve in the direction of the front-stage valve, the end of the annular protrusion is higher than the first circulation channel, and the part connected to the first circulation channel has an arc-shaped guide portion, and the front-stage channel is formed between the arc-shaped guide portion and the step ring seat.

[0014] By adopting the above technical scheme, the annular protrusion is located at the front end of the lower magnetic isolation sleeve, and its end is higher than the first circulation channel, providing additional structural support for the movement of the front-stage valve and the main-stage valve, ensuring the coaxiality and stability between the components. The front-stage channel formed between the annular protrusion and the step ring seat of the upper magnetic isolation sleeve is used to connect the front-stage cavity and the first circulation channel, and then guide the oil in the front-stage cavity to the first circulation channel, thereby realizing the effective distribution of the oil between the front-stage valve and the main-stage valve. The arc-shaped guide portion is located at the connection between the annular protrusion and the first circulation channel. The design of the arc-shaped guide portion significantly reduces the impact of the oil when entering the front-stage channel, and avoids the turbulence caused by the right-angle design. This optimized flow path makes the oil flow more stable, reduces pressure fluctuations, improves the accuracy of damping force adjustment, and reduces energy loss.

[0015] The above-mentioned proportional solenoid valve assembly for a shock absorber can be further configured as follows: one end of the lower magnetic isolation sleeve is provided with a first threaded portion threadedly connected to the upper magnetic isolation sleeve, and the other end is provided with a second threaded portion threadedly connected to the valve ring seat, and the second threaded portion has an adjustment step at one end facing the main-stage valve, and the outer peripheral surface of the valve ring seat is arranged to abut against the main-stage valve.

[0016] By adopting the above technical scheme, a stable and flexible connection is achieved between the upper magnetic isolation sleeve, the lower magnetic isolation sleeve and the valve ring seat through a threaded connection, and quick disassembly and assembly with the upper magnetic isolation sleeve, the lower magnetic isolation sleeve and the valve ring seat is realized, thereby avoiding the cumulative tolerance superposition here, improving the convenience of maintenance and replacement, and reducing maintenance costs. By providing an adjustment step with an adjustable gap between the second threaded portion and the main-stage valve, the second threaded portion serves as a normal mounting structure of the valve ring seat. When additional spring preload force adjustment is required, the position of the main-stage valve can be adjusted by rotating the valve ring seat and adjusting the relative distance between the valve ring seat and the front-stage valve, thereby conveniently changing the space of the main-stage chamber.

[0017] The above-mentioned proportional solenoid valve assembly for a shock absorber can be further configured as follows: a converging transition cavity is provided between the first circulation channel and the second circulation channel, a first diameter expansion portion is provided at one end of the first circulation channel corresponding to the converging transition cavity, and the inner wall of the first diameter expansion portion is connected to the first circulation channel at a circular arc angle, and a second diameter expansion portion is provided at one end of the second circulation channel corresponding to the converging transition cavity, and the inner wall of the second diameter expansion portion is connected to the second circulation channel at a circular arc angle.

[0018] By adopting the above technical scheme, the converging transition chamber is located between the first circulation channel and the second circulation channel, providing a buffer area for the oil. This area allows the oil to smoothly transition and distribute before entering the next channel, reducing the impact and pressure fluctuations in the flow. By increasing the cross-sectional area of ​​the converging transition chamber at the intersection of the first circulation channel and the second circulation channel, the oil can be more evenly distributed between the main-stage valve and the front-stage valve, thereby improving the damping effect of the entire system and avoiding hysteresis. The inner walls of the first and second expanded diameter portions adopt an arc angle design, which effectively reduces the impact of the oil when entering or leaving the converging transition chamber, avoiding turbulence and pressure fluctuations caused by the right-angle design, so that the oil can smoothly transition from one channel to another, optimizing the flow path, and improving the smoothness of the damping liquid. The noise and hysteresis during the operation of the device can be significantly reduced, and the ride comfort can be improved.

[0019] The above-mentioned proportional solenoid valve assembly for a shock absorber can be further configured as follows: a plurality of height adjustment gaskets or height adjustment springs are provided between the first circulation channel and the second circulation channel, one end of the height adjustment gasket or the height adjustment spring is abutted against the lower magnetic isolation sleeve, and the other end is abutted against the valve ring seat, and there is a through hole in the middle for connecting the first circulation channel and the second circulation channel.

[0020] By adopting the above technical solution, one or more superimposed height adjustment gaskets or height adjustment springs are selected to adjust the preload force of the valve ring seat and control the height of the main-stage valve to ensure the consistency of the spring force between the valve ring seat and the main-stage valve, and offset the superposition of the tolerances of the axial parts, which is ultimately reflected in the gap between the valve ring seat and the main-stage valve, so that the preload spring forces at both ends remain balanced, avoiding the problem of being unable to apply torque after the valve ring seat is locked.

[0021] The above-mentioned proportional solenoid valve assembly for a shock absorber can be further configured as follows: the moving iron assembly includes a moving iron and a moving iron core shaft, one end of the moving iron core shaft is interference-fitted inside the moving iron, and the other end extends out of the moving iron seat and is fixedly connected to the front-stage valve, and the end of the moving iron core shaft away from the front-stage valve is welded integrally with the moving iron.

[0022] With the above technical solution, the moving iron assembly consists of a moving iron and a moving iron core shaft. The moving iron is the core component of the solenoid valve, responsible for responding to the magnetic field generated by the electromagnetic coil, while the moving iron core shaft is the support and guide component of the moving iron. One end of the moving iron core shaft is installed inside the moving iron through an interference fit. Interference fit is an assembly method that achieves a tight connection through elastic deformation of the material, which can provide a high-strength connection and ensure a tight fit between the moving iron and the moving iron core shaft. The end of the moving iron core shaft away from the front valve is fixed to the moving iron through laser welding to fill the end gap between them, further enhancing the bonding strength between the two. Through the structural optimization of the moving iron assembly, its strength, stability and motion performance are significantly improved. Through the design of interference installation and welding, the connection between the moving iron core shaft and the moving iron is more secure, reducing the risk of loosening. This design not only improves the accuracy of damping force adjustment and the reliability of the device, but also reduces noise and vibration, avoids the displacement of the moving iron assembly during movement, and improves the accuracy of damping adjustment.

[0023] The above-mentioned proportional solenoid valve assembly for a shock absorber can be further configured as follows: the moving iron assembly also includes a valve spring and a return spring, the moving iron assembly is maintained in a pre-defined initial position by the valve spring and the return spring acting in opposite directions, the end of the moving iron seat corresponding to the return spring is provided with a limit ring seat which is pre-tightened against the return spring, there is a gap between the limit ring seat and the moving iron core shaft, and a moving iron bushing is provided at the end of the limit ring seat away from the return spring, the outer wall of the moving iron bushing is tightly fitted with the moving iron seat, and the inner wall slides against the moving iron core shaft.

[0024] By adopting the above technical scheme, the moving iron assembly is maintained in a pre-defined initial position by the spring assemblies with opposite effects, thereby achieving stable positioning and good resetting ability of the moving iron assembly, which ensures that the front-stage valve can be maintained in a predetermined position when the power is not supplied, ensuring the stability and reliability of the device, while avoiding the tilting of the moving iron core shaft. The setting of the limit ring seat enables the reset spring to set the preload force through the limit ring seat, and the setting of the moving iron bushing on the coaxial line replaces the contact between the moving iron core shaft and the moving iron seat, thereby avoiding the moving iron core shaft from tilting during movement, thereby causing jamming, improving transmission efficiency, avoiding wear, and increasing service life.

[0025] The above-mentioned proportional solenoid valve assembly for a shock absorber can be further configured as follows: a valve ring damping adjustment component is provided on the valve ring seat, and the valve ring damping adjustment component includes a valve stem inserted into the valve ring seat, a damping valve plate group sleeved on the outer peripheral surface of the valve stem, and a first damping channel opened on the valve ring seat and connected to the main stage chamber; one end of the valve stem passes through the valve ring seat and is sleeved with the damping valve plate group, thereby pressing the damping valve plate group onto the surface of the first damping channel.

[0026] By adopting the above technical scheme, through the setting of the valve stem and the damping valve plate group, the damping valve plate group is pressed on the surface of the first damping channel, and the damping force flowing through the first damping channel is controlled, thereby adjusting the flow rate and pressure of the damping medium. The linkage control of the second circulation channel and the first circulation channel further optimizes the distribution of the damping medium, improves the response speed and adjustment accuracy of the shock absorber, and by controlling the disconnection or conduction of the second circulation channel and the first circulation channel, precise control of the flow of the damping medium is achieved, thereby optimizing the performance of the shock absorber.

[0027] The above-mentioned proportional solenoid valve assembly for a shock absorber can be further configured as follows: one end of the lower magnetic isolation sleeve corresponding to the front-stage valve is provided with a guide hole for the central axis of the main-stage valve to pass through, the central axis is provided with an axial channel corresponding to the front-stage valve and a transverse channel respectively connected to the axial channel and the main-stage cavity, one end of the main-stage valve is provided with a main cavity through groove connected to the transverse channel, and the other end is provided with a step ring groove seat, the inner diameter of the step ring groove seat is larger than the inner diameter of the main-stage valve, and the inner wall of the step ring groove seat away from the end of the valve ring seat is at an arc angle.

[0028] By adopting the above technical scheme, a controllable damping force is applied to the main-stage valve through the valve ring damping adjustment component, so that the damping oil can enter the front-stage valve through the main-stage cavity, the main-cavity through groove, the transverse channel and the axial channel, and reflux through the first circulation channel and the second circulation channel to realize the overall circulation of the damping. A step ring groove seat is provided at the other end of the main-stage valve, the inner diameter of which is larger than the inner diameter of the main-stage valve, and the inner wall is set at a circular arc angle, so that when the damping oil in the first damping channel enters the main-stage chamber, the impact of the oil during the flow process is reduced, the flow path is optimized, a buffer is provided for the movement of the main-stage valve, and the stability of the overall structure is enhanced.

[0029] The utility model is further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a cross-sectional schematic diagram of an embodiment of the utility model.

[0031] Figure 2 for Figure 1 Enlarged view of point A.

[0032] Figure 3 for Figure 1 Enlarged view of point B. DETAILED DESCRIPTION

[0033] like Figure 1-Figure 3As shown, a proportional solenoid valve assembly for a shock absorber includes an upper magnetic isolation sleeve 1, a lower magnetic isolation sleeve 2, a front-stage valve 3 and a main-stage valve 4. One end of the lower magnetic isolation sleeve 2 is provided with a first threaded portion 21 threadedly connected to the upper magnetic isolation sleeve 1, and the other end is provided with a second threaded portion 22 threadedly connected to a valve ring seat 5. The second threaded portion 22 has an adjustment step 221 at one end facing the main-stage valve 4. The outer peripheral surface of the valve ring seat 5 is set against the main-stage valve 4. The upper magnetic isolation sleeve 1 is provided with a moving iron component 6 connected to the front-stage valve 3 and a moving iron component 6 arranged on the moving iron component 6. The moving iron seat 7 at the front end and the main-stage valve 4 are movably installed in the lower magnetic isolation sleeve 2, and are arranged against the front-stage valve 3 after passing through the lower magnetic isolation sleeve 2. One end of the lower magnetic isolation sleeve 2 is provided with a front-stage chamber I for the front-stage valve 3 to float therein, and the other end is provided with a main-stage chamber II which cooperates with the valve ring seat 5 to form a main-stage chamber 2 for the main-stage valve 4 to move therein. The moving iron seat 7 is tightly installed in the upper magnetic isolation sleeve 1, and a first flow channel 23 that straightly passes through the lower magnetic isolation sleeve 2 is opened on one side of the lower magnetic isolation sleeve 2, and a second flow channel 51 that is conductive with the first flow channel 23 is provided on the valve ring seat 5.

[0034] like Figure 1 , Figure 3 As shown, a front-stage channel III for connecting the front-stage cavity I with the first circulation channel 23 is provided between the upper magnetic isolation sleeve 1 and the lower magnetic isolation sleeve 2, a step ring seat 11 is provided at the upper magnetic isolation sleeve 1 corresponding to the first circulation channel 23, and the inner wall of the step ring seat 11 forms an arc angle, and an annular protrusion 24 extends from one end of the lower magnetic isolation sleeve 2 in the direction of the front-stage valve 3, and the end of the horizontal plane of the annular protrusion 24 is higher than the first circulation channel 23, and the part connected to the first circulation channel 23 has an arc-shaped guide portion 241, and the arc-shaped guide portion 241 is provided. The front-stage channel III is formed between the guide portion 241 and the step ring seat 11, and a converging transition cavity IV is provided between the first circulation channel 23 and the second circulation channel 51. A first diameter expansion portion 231 is provided at one end of the first circulation channel 23 corresponding to the converging transition cavity IV, and the inner wall of the first diameter expansion portion 231 is connected to the first circulation channel 23 at a circular arc angle. A second diameter expansion portion 511 is provided at one end of the second circulation channel 51 corresponding to the converging transition cavity IV, and the inner wall of the second diameter expansion portion 511 is connected to the second circulation channel 51 at a circular arc angle.

[0035] like Figure 3 As shown, one or more superimposed height adjustment springs (gaskets) 50 are provided between the first circulation channel 23 and the second circulation channel 51 to eliminate the cumulative tolerance of the axial parts and adjust the spring forces at both ends to maintain balance. One end of the height adjustment spring (gasket) 50 abuts against the lower magnetic isolation sleeve 2, and the other end abuts against the valve ring seat 5, and there is a through hole 501 in the middle for communication between the first circulation channel 23 and the second circulation channel 51.

[0036] like Figure 2As shown, the moving iron assembly 6 includes a moving iron 61, a moving iron core shaft 62, a valve spring 63 and a return spring 64. One end of the moving iron core shaft 62 is interference-fitted inside the moving iron 61, and the other end extends out of the moving iron seat 7 and is fixedly connected to the front-stage valve 3. The end of the moving iron core shaft 62 away from the front-stage valve 3 is integrally welded to the end of the moving iron 61 by laser. The moving iron assembly 6 is maintained in a predefined initial position by the valve spring 63 and the return spring 64 that act in opposite directions. The end of the moving iron seat 7 corresponding to the return spring 64 is provided with a limiting ring seat 71 that is pre-tightened against the return spring 64. A gap V is provided between the limiting ring seat 71 and the moving iron core shaft 62, and a moving iron bushing 711 is provided at the end of the limiting ring seat 71 away from the return spring 64. The outer wall of the moving iron bushing 711 is tightly fitted with the moving iron seat 7, and the inner wall slides against the moving iron core shaft 62, thereby accurately guiding the moving iron core shaft 62 to avoid deviation.

[0037] like Figure 1 , Figure 3 As shown, a valve ring damping adjustment component is provided on the valve ring seat 5, and the valve ring damping adjustment component includes a valve stem 52 inserted into the valve ring seat 5, a damping valve plate group 53 sleeved on the outer peripheral surface of the valve stem 52, and a first damping channel 54 opened on the valve ring seat 5 and connected to the main stage chamber II. After one end of the valve stem 52 passes through the valve ring seat 5, the damping valve plate group 53 is sleeved, and then the damping valve plate group 53 is pressed against the surface of the first damping channel 54. One end of the lower magnetic isolation sleeve 2 corresponding to the front stage valve 3 is provided with a guide for the central axis 42 of the main stage valve 4 to pass through. The guide hole 20, the central axis 42 is provided with an axial channel 421 corresponding to the front-stage valve 3 and a transverse channel 422 respectively connected with the axial channel 421 and the main-stage chamber II, one end of the main-stage valve 4 is provided with a main chamber through groove 41 connected with the transverse channel 522, and the other end is provided with a step ring groove seat 43, the inner diameter of the step ring groove seat 43 is larger than the inner diameter of the main-stage valve 4, and the inner wall of the step ring groove seat 43 away from the valve ring seat 5 is connected and transitioned with the inner cavity of the main-stage valve 4 at an arc angle, thereby reducing the impact pressure of the main-stage valve 4.

Claims

1. A proportional solenoid valve assembly for a shock absorber, comprising an upper magnetic isolation sleeve, a lower magnetic isolation sleeve, a front-stage valve, and a main-stage valve, wherein the upper magnetic isolation sleeve is detachably connected to the lower magnetic isolation sleeve, wherein a moving iron assembly connected to the front-stage valve and a moving iron seat arranged at the front end of the moving iron assembly are arranged in the upper magnetic isolation sleeve, wherein the main-stage valve is movably installed in the lower magnetic isolation sleeve, and after passing through the lower magnetic isolation sleeve, it is abutted against the front-stage valve, wherein a valve ring seat is arranged at the bottom of the lower magnetic isolation sleeve, wherein one end of the lower magnetic isolation sleeve cooperates with the upper magnetic isolation sleeve to form a front-stage chamber for the front-stage valve to float therein, and the other end cooperates with the valve ring seat to form a main-stage chamber for the main-stage valve to move therein, wherein the main-stage valve is characterized in that: The moving iron seat is tightly installed in the upper magnetic isolation sleeve, the lower magnetic isolation sleeve is provided with a first circulation channel which straightly passes through the lower magnetic isolation sleeve, the valve ring seat is provided with a second circulation channel which is connected to the first circulation channel, and a front-stage channel which connects the front-stage cavity with the first circulation channel is provided between the upper magnetic isolation sleeve and the lower magnetic isolation sleeve.

2. A proportional solenoid valve assembly for a shock absorber according to claim 1, characterized in that: A step ring seat is provided at a position of the upper magnetic isolation sleeve corresponding to the first circulation channel, and the inner wall of the step ring seat forms an arc angle.

3. A proportional solenoid valve assembly for a shock absorber according to claim 2, characterized in that: An annular protrusion extends from one end of the lower magnetic isolation sleeve toward the front-stage valve, the end of the annular protrusion is higher than the first circulation channel, and the part connected to the first circulation channel has an arc-shaped guide portion, and the front-stage channel is formed between the arc-shaped guide portion and the step ring seat.

4. A proportional solenoid valve assembly for a shock absorber according to claim 3, characterized in that: The lower magnetic isolation sleeve has a first threaded portion threadedly connected to the upper magnetic isolation sleeve at one end, and a second threaded portion threadedly connected to the valve ring seat at the other end. The second threaded portion has an adjustment step at one end facing the main valve, and the outer peripheral surface of the valve ring seat is arranged to abut against the main valve.

5. A proportional solenoid valve assembly for a shock absorber according to any one of claims 1 to 4, characterized in that: A converging transition cavity is provided between the first circulation channel and the second circulation channel, a first diameter expansion portion is provided at one end of the first circulation channel corresponding to the converging transition cavity, and the inner wall of the first diameter expansion portion is connected to the first circulation channel at a circular arc angle, and a second diameter expansion portion is provided at one end of the second circulation channel corresponding to the converging transition cavity, and the inner wall of the second diameter expansion portion is connected to the second circulation channel at a circular arc angle.

6. A proportional solenoid valve assembly for a shock absorber according to any one of claims 1 to 4, characterized in that: There are several height adjustment gaskets or height adjustment springs between the first circulation channel and the second circulation channel. One end of the height adjustment gasket or height adjustment spring is against the lower magnetic isolation sleeve, and the other end is against the valve ring seat, and there is a through hole in the middle for the first circulation channel and the second circulation channel to communicate.

7. A proportional solenoid valve assembly for a shock absorber according to any one of claims 1 to 4, characterized in that: The moving iron assembly includes a moving iron and a moving iron core shaft. One end of the moving iron core shaft is interference-fitted inside the moving iron, and the other end extends out of the moving iron seat and is fixedly connected to the front-stage valve. The end of the moving iron core shaft away from the front-stage valve is welded to the moving iron as a whole.

8. A proportional solenoid valve assembly for a shock absorber according to claim 7, characterized in that: The moving iron assembly also includes a valve spring and a return spring. The moving iron assembly is maintained in a predefined initial position by the valve spring and the return spring that act in opposite directions. The end of the moving iron seat corresponding to the return spring is provided with a limit ring seat that is pre-tightened against the return spring. There is a gap between the limit ring seat and the moving iron core shaft, and a moving iron bushing is provided at the end of the limit ring seat away from the return spring. The outer wall of the moving iron bushing is tightly fitted with the moving iron seat, and the inner wall slides against the moving iron core shaft.

9. A proportional solenoid valve assembly for a shock absorber according to any one of claims 1 to 4, characterized in that: The valve ring seat is provided with a valve ring damping adjustment assembly, which includes a valve stem inserted into the valve ring seat, a damping valve plate group sleeved on the outer peripheral surface of the valve stem, and a first damping channel opened on the valve ring seat and connected to the main stage chamber. One end of the valve stem passes through the valve ring seat and is sleeved with the damping valve plate group, thereby pressing the damping valve plate group onto the surface of the first damping channel.

10. A proportional solenoid valve assembly for a shock absorber according to claim 9, characterized in that: One end of the lower magnetic isolation sleeve corresponding to the front-stage valve is provided with a guide hole for the central axis of the main-stage valve to pass through, and the central axis is provided with an axial channel corresponding to the front-stage valve and a transverse channel respectively connected to the axial channel and the main-stage cavity, one end of the main-stage valve is provided with a main cavity through groove connected to the transverse channel, and the other end is provided with a step ring groove seat, the inner diameter of the step ring groove seat is larger than the inner diameter of the main-stage valve, and the inner wall of the step ring groove seat away from the valve ring seat has an arc angle.

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