Novel external electromagnetic valve assembly of shock absorber

Abstract

A novel external electromagnetic valve assembly of a shock absorber comprises an electromagnetic assembly and a valve body assembly, a guide-in valve sub assembly of the valve body assembly adjusts flow through a throttling valve piece, then adjustment of damping bandwidth is achieved, and the electromagnetic assembly is matched with a pilot hole and a damping hole of a main valve element of the valve body assembly through an electromagnetically-driven conical rod. The damping force can be stably established, the concept is novel, the design is ingenious, the stable damping force can be rapidly provided, and the effect is remarkable.

Description

Technical Field

[0001] The utility model belongs to the technical field of vibration damping, and specifically relates to an external solenoid valve for an automotive shock absorber. Background Art

[0002] With the development of technology and the improvement of people's living standards, the previous private passenger cars have gradually become difficult to meet people's needs. People have gradually accepted the changes brought by intelligence and have higher and higher requirements for intelligent driving and comfort. Traditional suspensions and traditional shock absorbers can no longer meet the current needs, and instead, the demand for intelligent suspensions and intelligent shock absorbers is increasing day by day. In terms of the current design and structure of intelligent suspensions and intelligent shock absorbers, according to their working principles, intelligent suspensions and intelligent shock absorbers require solenoid valves to provide damping force for adjustment and control. However, the solenoid valves currently applied in the market have problems such as narrow adjustment bandwidth, large flow rate required for damping force establishment, slow damping establishment speed, unstable established damping force, and even some solenoid valves have problems of many parts and difficult management and control, and cannot meet the needs of current intelligent suspensions and intelligent shock absorbers. Content of the Utility Model

[0003] In order to solve the deficiencies of the prior art, the utility model proposes a new type of external solenoid valve assembly for a shock absorber, which can effectively and quickly provide stable damping force.

[0004] The technical problems to be solved by the utility model are realized through the following technical solutions:

[0005] A new type of external solenoid valve assembly for a shock absorber includes an electromagnetic component and a valve body component. The electromagnetic component includes a push rod driven by an electromagnet at the center, and a tapered rod with a tapered head is arranged at the front end of the push rod. The valve body component includes a valve body and a main spool and an inlet valve sub-assembly arranged in the valve body. A pilot hole matching with the tapered head of the tapered rod is opened in the center of the main spool. Damping holes for hydraulic oil to pass through are opened on the side of the main spool. The main spool divides the inside of the valve body into two inner and outer volume chambers. The inner volume chamber and the outer volume chamber are communicated through the damping holes. An oil outlet hole is opened on the valve body corresponding to the outer volume chamber. An oil outlet channel is arranged on the end face of the main spool close to the tapered rod separated by the pilot hole, and the oil outlet channel communicates to the outside of the valve body; a replaceable throttle valve sheet is arranged inside the inlet valve sub-assembly, and an oil passing channel for hydraulic oil to pass through is opened in the inlet valve sub-assembly, and the edge of the throttle valve sheet blocks at the oil passing channel.

[0006] In the utility model, the throttle valve sheet is a circular sheet, and an oil passing groove recessed towards the center is opened on its edge. The replaceable throttle valve sheet includes various specifications with different overall outer diameters and different depths of the oil passing groove.

[0007] Furthermore, the edge of the inlet valve sub-assembly is clamped inside the valve body, and a fastening device for installing the throttle valve sheet is arranged inside the inlet valve sub-assembly.

[0008] Further, a support valve seat is arranged between the inlet valve sub-assembly and the main spool valve. At least one oil passage hole communicating with the oil passage of the inlet valve sub-assembly is arranged in the middle of the support valve seat. The inner side of the support valve seat limits the main spool valve and forms a sealing pair, and an outer volume cavity is enclosed with the main spool valve.

[0009] In the present utility model, the side surface of the main spool valve is in clearance fit with the inner side of the valve body, and a piston ring is arranged on the side surface of the main spool valve. The side surface of the main spool valve axially seals and slides along the inner side of the valve body.

[0010] In the present utility model, the electromagnetic assembly includes a fixed annular coil and a moving iron core arranged at the center of the coil. The moving iron core is fixedly arranged concentrically with the ejector rod and axially moves under the electromagnetic drive of the coil.

[0011] Further, the coil is fixed in an integral yoke sleeve. A cylindrical magnetic moving space is left inside the annular coil. A rear guide sleeve is arranged at the bottom of the magnetic moving space, and a front guide sleeve is arranged at the top of the magnetic moving space. The axial movement range of the moving iron core and the ejector rod is restricted between the front guide sleeve and the rear guide sleeve. Holes are left at the centers of the front guide sleeve and the rear guide sleeve, and the ejector rod axially moves through the central holes of the front guide sleeve and the rear guide sleeve.

[0012] Further, one end of the coil is closed by the integral yoke sleeve, and a yoke piece is arranged at the other end. The detachable structure of the yoke piece facilitates the maintenance and replacement of the coil.

[0013] In the present utility model, a solenoid valve gland and a solenoid valve seat are arranged outside the electromagnetic assembly and the valve body assembly. A plug is arranged at the end of the electromagnetic assembly. A sealing structure is arranged between the plug and the solenoid valve gland, and a sealing structure is arranged between the solenoid valve seat and the electromagnetic assembly inside the solenoid valve seat.

[0014] Compared with the prior art, the present utility model has the following advantages:

[0015] This application constitutes a three-stage regulation of hydraulic oil, and can fully realize the precise regulation and control of damping force. Among them, the inlet valve sub-assembly is used as the first-stage regulation to regulate the flow rate of the hydraulic oil entering. The main spool valve is used as the second-stage regulation to regulate the volume change of the hydraulic oil in the two volume cavities inside and outside the main spool valve. The tapered rod and the electromagnetic assembly are used as the third-stage regulation. By controlling different currents of the electromagnetic assembly, the thrust of the tapered rod on the main spool valve is regulated, and further the pressure peak value when the hydraulic oil breaks through the pilot hole is regulated;

[0016] This application passes through the inner volume cavity and the outer volume cavity communicated by the damping hole. When the solenoid valve provides damping for the main spool valve, a pressure difference can be formed between the inner volume cavity and the outer volume cavity, and thus the stable output of the damping force can be realized at the fastest speed;

[0017] In this application, by setting a throttle valve plate at the inlet valve sub-assembly, the control of the hydraulic oil flow rate can be achieved, and the lower limit of the damping bandwidth can be adjusted. At the same time, the replaceability of the throttle valve plate enables the entire solenoid valve assembly to have different damping bandwidth adjustment ranges;

[0018] In this application, both the pilot hole and the damping hole are provided in the main spool valve, so that only one main spool valve part can be used to adjust the damping force, which is convenient for maintenance and replacement;

[0019] In this application, the conical head of the conical rod cooperates with the pilot hole, which can not only seal the pilot hole, but also achieve a good self-centering effect;

[0020] This application ensures the accurate adjustment of the hydraulic oil and the precise control of the damping force output through multiple sealing structures, and has a long service life.

[0021] Therefore, the utility model has a novel concept and ingenious design, can quickly provide a stable damping force, and has remarkable effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of the utility model (the solenoid valve gland and the solenoid valve seat are not shown);

[0023] Figure 2 is a schematic structural diagram of the throttle valve plate of the utility model.

[0024] In the figure: inlet valve sub-assembly 1, screw rod 2, throttle valve plate 3, nut 4, support valve seat 5, valve body 6, oil outlet hole 7, main spool valve 8, pilot hole 9, damping hole 10, coil 11, moving iron core 12, ejector rod 13, front guide sleeve 14, rear guide sleeve 15, yoke piece 16, integrated yoke sleeve 17, conical rod 18, oil outlet channel 19, oil passing hole 20, sealing ring 21, plug 22, oil passing groove 23; outer volume chamber A, inner volume chamber B, magnetic moving space C. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The following further describes the present utility model in conjunction with the accompanying drawings of the specification and specific preferred embodiments, but does not limit the protection scope of the present utility model thereby.

[0026] A new type of external solenoid valve assembly for a shock absorber includes an electromagnetic component and a valve body 6 component. A solenoid valve gland and a solenoid valve seat are arranged on the outer sides of the electromagnetic component and the valve body 6 component, and a plug 22 is arranged at the end of the electromagnetic component.

[0027] In Figure 1Among them, the electromagnetic assembly includes an annular coil 11 and a moving iron core 12 arranged at the center of the coil 11. The coil 11 is fixed within an integral yoke sleeve 17. The integral yoke sleeve 17 leaves a cylindrical magnetic moving space C within the annular coil 11. A rear guide sleeve 15 is provided at the bottom of the magnetic moving space C, and a front guide sleeve 14 is provided at the top of the magnetic moving space C. The axial movement range of the moving iron core 12 is restricted between the front guide sleeve 14 and the rear guide sleeve 15. A push rod 13 is concentrically and fixedly arranged on the moving iron core 12. The push rod 13 axially moves through the central holes of the front guide sleeve 14 and the rear guide sleeve 15. A tapered rod 18 with a tapered head is provided at the front end of the push rod 13. One end of the coil 11 is closed by the integral yoke sleeve 17, and a yoke piece 16 is provided at the other end.

[0028] The valve body 6 assembly includes a valve body 6 and a main spool 8, a support valve seat 5, and an inlet valve sub-assembly 1 arranged within the valve body 6. A pilot hole 9 that mates with the tapered head of the tapered rod 18 is provided at the center of the main spool 8. A damping hole 10 for hydraulic oil to pass through is provided at the side of the main spool 8. The main spool 8 divides the inside of the valve body 6 into two inner and outer volume chambers. The inner volume chamber B and the outer volume chamber A communicate through the damping hole 10. An oil outlet hole 7 is provided on the valve body 6 corresponding to the outer volume chamber A. An oil outlet channel 19 is provided on the end face of the main spool 8 on the side close to the tapered rod 18 separated by the pilot hole 9. The oil outlet channel 19 communicates to the outside of the valve body 6. The side of the main spool 8 has a clearance fit with the inner side of the valve body 6, and a piston ring is provided on the side of the main spool 8. The side of the main spool 8 axially seals and slides along the inner side of the valve body 6. The edge of the inlet valve sub-assembly 1 is snap-fitted on the inner side of the valve body 6. A replaceable throttle valve disc 3 is provided inside the inlet valve sub-assembly 1. The inlet valve sub-assembly 1 is provided with an oil passage for hydraulic oil to pass through. The edge of the throttle valve disc 3 blocks at the oil passage, as Figure 2 shown, the throttle valve disc 3 is a circular sheet, and an oil passage groove 23 that is recessed towards the center is provided at its edge. A fastening device is provided at the center of the inlet valve sub-assembly 1. The fastening device is a screw 2 and a nut 4 that are screwed together. The throttle valve disc 3 is threaded onto the screw 2, and the nut 4 is sleeved on the free end of the screw 2 to install, adjust, and fix the throttle valve disc 3. The support valve seat 5 is arranged between the inlet valve sub-assembly 1 and the main spool 8. The inner side of the support valve seat 5 limits the main spool 8 and forms a sealing pair, enclosing the outer volume chamber A with the main spool 8. At least one oil passage hole 20 that communicates with the oil passage of the inlet valve sub-assembly 1 is provided in the middle of the support valve seat 5.

[0029] In this embodiment, the replaceable throttle valve disc 3 has different specifications with different outer diameters R and different depths H of the oil passage groove 23. By replacing throttle valve discs 3 of different specifications, the adjustment range of the damping bandwidth of the solenoid valve assembly can be adjusted.

[0030] In this embodiment, a sealing ring 21 is provided between the plug 22 and the solenoid valve gland, and a sealing ring 21 is provided between the solenoid valve seat and the electromagnetic assembly within the solenoid valve seat.

[0031] This application is applied to automotive shock absorbers and is a structural assembly of a hydraulic oil control solenoid valve for intelligently adjusting the shock absorption of shock absorbers. During actual adjustment, the solenoid valve pushes the push rod, causing the tapered rod 18 to block the pilot hole 9 of the main spool 8. At this time, the hydraulic oil enters the valve body 6 from the oil passage of the inlet valve sub-assembly 1, and after throttling adjustment by the throttle valve disc 3, the hydraulic oil enters the outer volume chamber A and leaves the valve body 6 through the oil outlet hole 7; when it is necessary to increase the damping force, the solenoid valve pulls back the push rod, the push rod retracts, and the pilot hole 9 is released. At this time, the hydraulic oil will also pass through the damping hole 10 into the inner volume chamber B, enter the other side of the main spool 8 through the pilot hole 9, and leave the valve body 6 through the oil outlet passage 19. When the hydraulic oil flows through the damping hole 10, a pressure difference is generated between the outer volume chamber A and the inner volume chamber B, thereby stably establishing the damping force.

[0032] In summary, combining the above structure and working process, it can be found that the novel shock absorber external solenoid valve assembly proposed in this application is novel in concept and ingenious in design, can quickly provide stable damping force, and has remarkable effects.

Claims

1. A novel shock absorber external solenoid valve assembly, including a solenoid assembly and a valve body assembly, characterized in that: The electromagnetic component includes a push rod located in the center and driven by an electromagnetic, and a conical rod with a conical head is arranged at the front end of the push rod. The valve body component includes a valve body and a main valve core and an inlet valve sub-assembly arranged in the valve body. A pilot hole matching the conical head of the conical rod is opened in the center of the main valve core, and a damping hole for hydraulic oil to pass through is opened on the side of the main valve core. The main valve core separates the valve body into two inner and outer volume chambers, and the inner volume chamber and the outer volume chamber are connected through the damping hole. An oil outlet hole is opened on the valve body corresponding to the outer volume chamber, and an oil outlet channel is arranged on the end face of the main valve core separated by the pilot hole and close to the conical rod, and the oil outlet channel is connected to the outside of the valve body; a replaceable throttle valve plate is arranged on the inner side of the inlet valve sub-assembly, and an oil passage channel for hydraulic oil to pass through is opened in the inlet valve sub-assembly, and the edge of the throttle valve plate is blocked at the oil passage channel.

2. The solenoid valve assembly according to claim 1, characterized in that: The throttle valve plate is in the shape of a circular plate, and an oil passing groove which is sunken toward the center is provided on its edge.

3. The solenoid valve assembly according to claim 2, characterized in that: A fastening device for mounting a throttle valve plate is arranged inside the inlet valve sub-assembly.

4. The solenoid valve assembly according to claim 3, characterized in that: A supporting valve seat is arranged between the inlet valve sub-assembly and the main valve core. At least one oil-passing hole connected to the oil-passing channel of the inlet valve sub-assembly is arranged in the middle of the supporting valve seat. The outer side of the supporting valve seat supports the inlet valve sub-assembly, and the inner side of the supporting valve seat limits the main valve core and forms a sealing pair, thereby enclosing an external volume cavity with the main valve core.

5. The solenoid valve assembly according to claim 1, characterized in that: The side surface of the main valve core is matched with the inner side of the valve body in a clearance, and a piston ring is arranged on the side surface of the main valve core. The side surface of the main valve core slides axially and sealingly along the inner side of the valve body.

6. The solenoid valve assembly according to claim 1, characterized in that: The electromagnetic assembly comprises a fixed annular coil and a moving iron core arranged at the center of the coil. The moving iron core is fixedly arranged concentrically with the ejector rod and moves axially under the electromagnetic drive of the coil.

7. The solenoid valve assembly according to claim 6, characterized in that: The coil is fixed in an integrated yoke sleeve, which leaves a cylindrical magnetically moving space in the annular coil. A rear guide sleeve is provided at the bottom of the magnetically moving space, and a front guide sleeve is provided at the top of the magnetically moving space. The front guide sleeve and the rear guide sleeve constrain the axial movement range of the moving iron core and the push rod. Holes are left in the centers of the front guide sleeve and the rear guide sleeve, and the push rod moves axially through the center holes of the front guide sleeve and the rear guide sleeve.

8. The solenoid valve assembly according to claim 7, characterized in that: One end of the coil is closed by an integrated yoke sleeve, and the other end is provided with a yoke sheet.

9. The solenoid valve assembly according to claim 1, characterized in that: A solenoid valve gland and a solenoid valve seat are arranged on the outside of the solenoid assembly and the valve body assembly, a plug is arranged at the end of the solenoid assembly, a sealing structure is arranged between the plug and the solenoid valve gland, and a sealing structure is arranged between the solenoid valve seat and the solenoid assembly in the solenoid valve seat.

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