Pilot-operated type electromagnetic valve and automobile shock absorber

Abstract

The invention discloses a pilot-operated type electromagnetic valve and an automobile shock absorber. The pilot-operated type electromagnetic valve comprises an outer valve sleeve, a main valve cover, a pilot-operated valve plate, a pilot-operated valve element and an electromagnet assembly. The main valve cover is partially inserted into the outer valve sleeve and is connected with the outer valve sleeve so as to define a liquid outlet channel; an adjusting hole is formed in the main valve cover; the pilot valve plate is pressed and limited to the outer valve sleeve by the main valve cover, an oil flow channel is formed in the pilot valve plate, and the oil flow channel is communicated with the adjusting hole and the liquid outlet channel; the pilot valve element is arranged right opposite to the adjusting hole and is in transmission connection with the pilot valve block, and the pilot valve element can do reciprocating motion relative to the adjusting hole and is used for controlling the flow opening degree of the adjusting hole and changing the circulation caliber of the oil liquid flow channel. In this way, on one hand, the passing ability of the pilot-operated type electromagnetic valve to large-particle impurities can be improved, and therefore the effect of prolonging the service life of the pilot-operated type electromagnetic valve is achieved; and on the other hand, the machining precision between the main valve cover and the pilot valve plate can be reduced, and the effect of reducing the manufacturing difficulty and cost is achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field related to solenoid valves, and in particular relates to a pilot-operated solenoid valve and an automobile shock absorber. Background Art

[0002] Pilot-operated solenoid valves are used in automotive shock absorbers (such as active or semi-active suspension systems) to adjust the damping characteristics of the shock absorbers by precisely controlling the hydraulic or pneumatic circuits, thereby improving the vehicle's dynamic performance, comfort, and safety.

[0003] Currently, pilot-operated solenoid valves in automotive shock absorbers typically rely on a tiny clearance between the pilot valve sleeve and the main valve cover to deliver oil and pressure relief. However, this design has significant drawbacks: Firstly, the extremely small clearance requires extremely high machining precision, significantly increasing manufacturing difficulty and cost. Secondly, during the long-term, high-frequency operation of automotive shock absorbers, component wear generates large impurities, which can easily clog the already narrow clearance, causing the valve core to become stuck and severely impacting the reliability and service life of the solenoid valve. Summary of the Invention

[0004] In view of this, it is necessary to provide a pilot solenoid valve and an automobile shock absorber for solving the above technical problems.

[0005] A pilot-operated solenoid valve, comprising:

[0006] Outer valve sleeve;

[0007] The main valve cover is partially inserted into the outer valve sleeve and connected to the outer valve sleeve, and a liquid outlet channel is formed between the portion of the main valve cover located inside the outer valve sleeve and the outer valve sleeve; an adjustment hole is opened on the main valve cover;

[0008] A pilot valve disc is pressed and limited to the outer valve sleeve by the main valve cover, and an oil flow channel is formed on the pilot valve disc, and the oil flow channel is respectively connected to the regulating hole and the liquid outlet channel;

[0009] A pilot valve core is arranged opposite to the regulating hole and is in driving connection with the pilot valve plate, and the pilot valve core can make reciprocating motion relative to the regulating hole, and is used to control the flow opening of the regulating hole and change the flow diameter of the oil flow channel;

[0010] The electromagnet assembly is installed on the outer valve sleeve and abuts against the pilot valve core to limit its position, and is used to push the pilot valve core to move toward the regulating hole.

[0011] It can be understood that the main valve cover fixedly connected to the outer valve sleeve is used to form a liquid outlet channel enclosed by the outer valve sleeve for liquid outlet, and the oil flow channel on the pilot valve plate is used to realize the connection between the adjusting hole on the main valve cover and the liquid outlet channel. In this way, high-precision matching between the main valve cover and the pilot valve plate can be avoided. In this way, on the one hand, the passability of the pilot solenoid valve to large particles of impurities can be improved, thereby increasing the service life of the pilot solenoid valve; on the other hand, the machining accuracy between the main valve cover and the pilot valve plate can be reduced, which has the effect of reducing manufacturing difficulty and cost.

[0012] In one embodiment, the pilot valve plate includes an elastic plate, a flow valve plate and a valve plate, and the elastic plate, the flow valve plate and the valve plate are sequentially mounted on the pilot valve core, and the elastic plate abuts against the pilot valve core to limit the position;

[0013] The circulation valve plate is provided with a first flow channel hole, and the valve plate is provided with a second flow channel hole. The first flow channel hole portion can be connected to the liquid outlet channel through the second flow channel hole to form the oil flow channel;

[0014] Part of the first flow channel hole can be blocked by the elastic sheet, and the elastic sheet can be separated from the flow valve sheet under the drive of the pilot valve core to release the seal of the part of the first flow channel hole blocked by the elastic sheet.

[0015] In one embodiment, the number of the first flow channel hole is configured to be at least one; wherein each of the first flow channel holes includes an arc-shaped hole portion and a flow channel hole portion that are interconnected, the arc-shaped hole portion is connected to the second flow channel hole, and the arc-shaped hole portion can be blocked by the elastic sheet, and the flow channel hole portion is connected to the regulating hole;

[0016] Wherein, the second flow channel hole is configured to be an arc-shaped structure matching the arc-shaped hole portion.

[0017] In one embodiment, the number of the first flow channel holes is configured to be multiple, and the multiple first flow channel holes are evenly arranged on the flow valve plate;

[0018] The number of the second flow channel holes is also configured to be multiple, and the multiple second flow channel holes are evenly arranged on the valve plate, and the distance between two adjacent second flow channel holes in the circumferential direction of the pilot valve core is smaller than the length of the arc-shaped hole portion in the first flow channel hole in the circumferential direction of the pilot valve core.

[0019] It can be understood that through the above-mentioned structural setting, when the pilot valve plate is superimposed on the valve plate in any direction, the connection between the arc-shaped hole portion on the first flow channel hole and the second flow channel hole can be ensured. In this way, the assembly between the pilot valve plate and the valve plate can be non-directional, thereby facilitating the assembly between the pilot valve plate and the valve plate.

[0020] In one embodiment, the elastic sheet includes a main sheet and a plurality of supporting arms, wherein the plurality of supporting arms are sequentially and spaced apart from each other on the periphery of the main sheet and connected to the main sheet;

[0021] The main plate body can abut against the circulation valve plate to limit its position, so as to block part of the first flow channel hole; one end of multiple support arms away from the main plate body is pressed and limited to the circulation valve plate by the main valve cover, and the multiple support arms can undergo elastic deformation under the drive of the main plate body.

[0022] It can be understood that by utilizing the elastic deformation of multiple arms on the elastic sheet, not only can the elastic sheet control the flow area of ​​the first flow channel hole on the pilot valve sheet, but it can also drive the electromagnet assembly to reset after power failure, so as to meet the working requirements of the pilot solenoid valve.

[0023] In one embodiment, the pilot valve plate further includes a gasket, which is sleeved on the pilot valve core and abuts against the outer valve sleeve to limit its position, wherein a third flow channel hole is opened on the outer peripheral wall of the gasket, and the third flow channel hole is connected to the liquid outlet channel;

[0024] A spacer is provided between the gasket and the valve plate, and the spacer abuts against the gasket and the valve plate respectively to limit the position, so that the second flow channel hole is connected with the third flow channel hole.

[0025] In one embodiment, the spacer includes a first spacer and a second spacer, and the first spacer and the second spacer are arranged on the inner and outer sides of the second flow channel hole;

[0026] In the radial direction of the pilot valve core, the third flow channel hole portion is disposed on the inner side of the second spacer.

[0027] In one embodiment, the number of the third flow channel holes is configured to be multiple, and the multiple third flow channel holes are arranged on the gasket at equal intervals;

[0028] In the circumferential direction of the pilot valve core, the distance between two adjacent third flow channel holes is smaller than the channel diameter of the liquid outlet channel.

[0029] It can be understood that through the above-mentioned structural setting, when the gasket is assembled in the outer valve sleeve, the communication between the third flow channel hole and the liquid outlet channel can be ensured, so that the assembly of the gasket on the outer valve sleeve is non-directional, thereby facilitating the assembly of the gasket.

[0030] In one embodiment, the main valve cover is connected to the outer valve sleeve in an interference fit manner;

[0031] Wherein, a notch is provided on the main valve cover, and the groove wall of the notch and the outer valve sleeve are combined to form the liquid outlet channel.

[0032] The present application also seeks to protect an automobile shock absorber, comprising the pilot-operated solenoid valve described above.

[0033] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0034] The pilot solenoid valve and automobile shock absorber for which protection is sought in this application utilize a main valve cover fixedly connected to an outer valve sleeve and a liquid outlet channel formed by enclosing the outer valve sleeve for liquid outlet, and utilize an oil flow channel on the pilot valve plate to achieve communication between the regulating hole on the main valve cover and the liquid outlet channel. This can avoid high-precision matching between the main valve cover and the pilot valve plate. Thus, on the one hand, it can improve the permeability of the pilot solenoid valve to large particles of impurities, thereby increasing the service life of the pilot solenoid valve; on the other hand, it can also reduce the machining accuracy between the main valve cover and the pilot valve plate, thereby reducing manufacturing difficulty and cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the following briefly introduces the drawings required for use in the embodiments or the conventional technology descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0036] Figure 1 This is a schematic structural diagram of the pilot-operated solenoid valve provided in this application.

[0037] Figure 2 This is a cross-sectional view of the pilot-operated solenoid valve provided in this application.

[0038] Figure 3 This is a schematic diagram of the structure of the pilot valve plate and the pilot valve core when assembled in this application.

[0039] Figure 4 This is an exploded view of the pilot valve plate in this application.

[0040] Figure 5 This is a structural diagram of the circulation valve plate in this application.

[0041] Figure 6 This is a structural diagram of the main valve cover in this application.

[0042] Reference numerals: 100, pilot solenoid valve; 10, outer valve sleeve; 11, socket; 111, bottom wall; 112, peripheral wall; 20, main valve cover; 21, adjustment hole; 211, partition; 22, slot; 221, slot wall; 23, liquid inlet; 24, liquid outlet; 25, relief valve assembly; 30, pilot valve plate; 301, oil flow channel; 31, elastic plate; 311, main plate body; 312, support arm; 32, flow valve Plate; 321, first flow channel hole; 3211, arc-shaped hole portion; 3212, flow channel hole portion; 3213, connecting hole portion; 33, valve plate; 331, second flow channel hole; 34, gasket; 341, third flow channel hole; 35, spacer; 351, first spacer; 352, second spacer; 40, pilot valve core; 50, electromagnet assembly; 51, fixed iron core; 52, moving iron core; 53, ejector rod; 101, liquid outlet channel. DETAILED DESCRIPTION

[0043] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0044] It should be noted that when an element is referred to as being “provided on” another element, it may be directly provided on the other element or there may be an intermediate element. When an element is considered to be “provided on” another element, it may be directly provided on the other element or there may be an intermediate element. When an element is considered to be “fixed to” another element, it may be directly fixed to the other element or there may be an intermediate element.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0046] The pilot-operated solenoid valve 100 for which protection is sought in this application specifically refers to a pilot-operated solenoid valve structure used in automobile shock absorbers.

[0047] like Figure 1 、 Figure 2As shown, the pilot solenoid valve 100 provided in the present application includes an outer valve sleeve 10, a main valve cover 20, a pilot valve disc 30, a pilot valve core 40 and an electromagnet assembly 50; the main valve cover 20 is partially inserted into the outer valve sleeve 10 and connected to the outer valve sleeve 10, and a liquid outlet channel 101 is formed between the part of the main valve cover 20 located inside the outer valve sleeve 10 and the outer valve sleeve 10; an adjusting hole 21 is opened on the main valve cover 20; the pilot valve disc 30 is pressed and limited to the outer valve sleeve 10 by the main valve cover 20, and a liquid outlet channel 101 is formed on the pilot valve disc 30. An oil flow channel 301 is formed, which is connected to the regulating hole 21 and the liquid outlet channel 101 respectively. The pilot valve core 40 is arranged opposite the regulating hole 21 and is in transmission connection with the pilot valve disc 30. The pilot valve core 40 can reciprocate relative to the regulating hole 21 to control the flow opening of the regulating hole 21 and change the flow diameter of the oil flow channel 301. The electromagnet assembly 50 is installed on the outer valve sleeve 10 and abuts against the pilot valve core 40 to limit the position, and is used to push the pilot valve core 40 toward the regulating hole 21. In other words, the pilot solenoid valve 100 of the present application uses the pilot valve disc 30 as the pilot valve sleeve to achieve pressure relief control of the oil introduced into the main valve cover 20.

[0048] From the above, it can be seen that the pilot solenoid valve 100 of the present application uses the main valve cover 20 fixedly connected to the outer valve sleeve 10 and the outer valve sleeve 10 to form a liquid outlet channel 101 for liquid discharge, and uses the oil flow channel 301 on the pilot valve plate 30 to realize the connection between the adjusting hole 21 on the main valve cover 20 and the liquid outlet channel 101. In this way, high-precision matching between the main valve cover 20 and the pilot valve plate 30 can be avoided. In this way, on the one hand, the passability of the pilot solenoid valve 100 for large particles of impurities can be improved, thereby improving the service life of the pilot solenoid valve 100; on the other hand, it can also reduce the processing accuracy between the main valve cover 20 and the pilot valve plate 30, which has the effect of reducing manufacturing difficulty and cost.

[0049] It should be noted that, since the main valve cover 20 is fixedly mounted on the outer valve sleeve 10, and the oil flow channel 301 formed on the pilot valve plate 30 is used to discharge the oil introduced into the regulating hole 21, the pilot solenoid valve 100 can supply oil by opening a flow channel on an independent individual. Compared with the original structure of two clearance fits to form the flow channel for the oil supply, this greatly reduces the processing accuracy requirements of the corresponding components and can improve the effect of the channel diameter for the oil supply on the corresponding flow channel.

[0050] like Figure 2 As shown, in one embodiment, a socket 11 is formed on the outer valve sleeve 10, and the main valve cover 20 is partially inserted into the socket 11 and abuts against the bottom wall 111 of the socket 11 to limit the position. At the same time, the main valve cover 20 can be interference fit with the peripheral wall 112 of the socket 11, thereby realizing the assembly connection between the main valve cover 20 and the outer valve sleeve 10.

[0051] like Figure 6 As shown, in this embodiment, a notch 22 is formed in the main valve cover 20, and the groove wall 221 of the notch 22 and the outer valve sleeve 10 enclose a liquid outlet channel 101. In other words, the pilot-operated solenoid valve 100 of this embodiment uses the notch 22 formed in the main valve cover 20 to form the liquid outlet channel 101 for discharging the oil.

[0052] like Figure 1 、 Figure 2 and Figure 6 As shown, in one embodiment, the main valve cover 20 further defines a liquid inlet 23 and a liquid outlet 24, and a relief valve assembly 25 is mounted within the main valve cover 20. The liquid inlet 23 can communicate with the regulating hole 21 via the relief valve assembly 25, and the opening / closing between the liquid inlet 23 and the liquid outlet 24 can be controlled by the relief valve assembly 25. Thus, when the oil in the chamber within the relief valve assembly 25 is discharged through the regulating hole 21, the oil flow channel 301, and the liquid outlet channel 101, the relief valve assembly 25 opens under the action of the internal and external pressure differential, thereby connecting the liquid inlet 23 with the liquid outlet 24. Here, the number of liquid outlets 24 is configured to be multiple, and the multiple liquid outlets 24 are sequentially spaced along the circumference of the main valve cover 20. When the liquid inlet 23 and the liquid outlet 24 are connected, the oil discharged through the liquid outlet 24 constitutes the main oil discharge channel of the pilot-operated solenoid valve 100. It should be noted that the specific structure and working principle of the overflow valve assembly 25 can adopt existing conventional methods, which will not be elaborated here.

[0053] like Figure 3 、 Figure 4 As shown, in one embodiment, the pilot valve disc 30 includes an elastic disc 31, a circulation valve disc 32 and a valve disc 33. The elastic disc 31, the circulation valve disc 32 and the valve disc 33 are sequentially mounted on the pilot valve core 40, and the elastic disc 31 abuts against the pilot valve core 40 to limit the position; a first flow channel hole 321 is provided on the circulation valve disc 32, and a second flow channel hole 331 is provided on the valve disc 33. Part of the first flow channel hole 321 can be connected to the liquid outlet channel 101 through the second flow channel hole 331 to form an oil flow channel 301; wherein, part of the first flow channel hole 321 can be blocked by the elastic disc 31, and the elastic disc 31 can be separated from the circulation valve disc 32 under the drive of the pilot valve core 40 to release the seal of the part of the first flow channel hole 321 blocked by the elastic disc 31. That is to say, the pilot valve core 40 of this embodiment can drive the elastic sheet 31 to release the blockage of the first flow channel hole 321 on the circulation valve sheet 32 ​​while moving toward the regulating hole 21, so that the liquid inlet area of ​​the first flow channel hole 321 on the circulation valve sheet 32 ​​is increased, thereby increasing the flow rate of oil flowing into the oil flow channel 301.

[0054] like Figure 3 、 Figure 4 As shown, in this embodiment, the elastic plate 31 includes a main plate body 311 and a plurality of support arms 312. The plurality of support arms 312 are sequentially arranged at intervals around the periphery of the main plate body 311 and connected to the main plate body 311. Specifically, the plurality of support arms 312 and the main plate body 311 can be connected to each other as a whole. The main plate body 311 can abut against the circulation valve plate 32 to block a portion of the first flow channel hole 321. The ends of the plurality of support arms 312 away from the main plate body 311 are pressed and limited to the circulation valve plate 32 by the main valve cover 20. In addition, the plurality of support arms 312 can be elastically deformed under the influence of the main plate body 311. In other words, the elastic plate 31 of this embodiment can utilize the elastic deformation of the plurality of support arms 312 to not only control the flow area of ​​the first flow channel hole 321 on the circulation valve plate 32, but also drive the electromagnet assembly 50 to reset after power is off, thereby meeting the working requirements of the pilot-operated solenoid valve 100. Here, three support arms 312 are configured, evenly spaced around the periphery of the main plate 311. It is understood that in other embodiments, the number of support arms 312 may be two, four, or even more. It should be noted that the first flow channel hole 321 on the circulation valve plate 32 of this embodiment is not limited to being partially blocked by the main plate 311; it may also be partially blocked by the support arms 312. This will not be elaborated upon here.

[0055] like Figure 4 、 Figure 5 As shown, in this embodiment, the number of first flow channel holes 321 is configured to be at least one; wherein each first flow channel hole 321 includes an arc-shaped hole portion 3211 and a flow channel hole portion 3212 that are interconnected. The arc-shaped hole portion 3211 is connected to the second flow channel hole 331, and the arc-shaped hole portion 3211 can be blocked by the elastic sheet 31, and the flow channel hole portion 3212 is connected to the adjustment hole 21; wherein the second flow channel hole 331 is configured to have an arc-shaped structure that matches the arc-shaped hole portion 3211. In other words, the second flow channel hole 331 and the first flow channel hole 321 of this embodiment can be connected through the arc-shaped hole, thereby increasing the connection area when the flow valve plate 32 and the valve plate 33 are connected. Here, the arc-shaped hole portion 3211 and the flow channel hole portion 3212 are connected by the connecting hole portion 3213 extending in the radial direction of the flow valve plate 32.

[0056] like Figure 4 、 Figure 5As shown, in this embodiment, a plurality of first flow passage holes 321 are arranged evenly on the circulation valve disc 32. A plurality of second flow passage holes 331 are also arranged evenly on the valve disc 33. Furthermore, the spacing between two adjacent second flow passage holes 331 in the circumferential direction of the pilot valve core 40 is less than the length of the arcuate hole portion 3211 in the first flow passage hole 321 in the circumferential direction of the pilot valve core 40. This ensures that when the circulation valve disc 32 is stacked on the valve disc 33 in any orientation, communication between the arcuate hole portion 3211 in the first flow passage hole 321 and the second flow passage hole 331 is maintained. This allows for non-directional assembly of the circulation valve disc 32 and the valve disc 33, thereby facilitating assembly. Here, there are two first flow passage holes 321 and three second flow passage holes 331.

[0057] It should be noted that, when the elastic sheet 31 is abutted against the circulation valve sheet 32, the upper arm 312 of the elastic sheet 31 will partially block the flow channel hole 3212 on the circulation valve sheet 32; and, the valve sheet 33 of this embodiment is abutted against the circulation valve sheet 32, which can achieve the blocking of the flow channel hole 3212 on the circulation valve sheet 32. In this way, when the elastic sheet 31 is abutted against the circulation valve sheet 32 ​​and blocks the arc-shaped hole 3211, the circulation valve sheet 32 ​​can introduce oil through the connecting hole 3213 and achieve the conduction of the pilot valve sheet 30. It can be understood that this embodiment can achieve the non-directional assembly of the elastic sheet 31 on the circulation valve sheet 32 ​​through the structural setting of the valve sheet 33, thereby facilitating the assembly of the elastic sheet 31 on the circulation valve sheet 32.

[0058] like Figure 3 、 Figure 4 As shown, in this embodiment, the pilot valve disc 30 further includes a gasket 34, which is mounted on the pilot valve core 40 and abuts against the outer valve sleeve 10 for limiting position. A third flow hole 341 is defined on the outer peripheral wall of the gasket 34, which is in communication with the liquid outlet channel 101. Furthermore, a spacer 35 is disposed between the gasket 34 and the valve disc 33, abutting against both the gasket 34 and the valve disc 33 for limiting position, thereby allowing the second flow hole 331 to communicate with the third flow hole 341. In other words, the pilot valve disc 30 of this embodiment can use the spacer 35 to isolate the gasket 34 from the valve disc 33, allowing oil passing through the second flow hole 331 of the valve disc 33 to flow smoothly to the third flow hole 341 of the gasket 34, and then to flow through the third flow hole 341 to the liquid outlet channel 101 for discharge. Here, the gasket 34 is thicker to meet the use requirement that the pilot valve core 40 can pass through the gasket 34, the valve plate 33 and the flow valve plate 32 in sequence and then abut against the elastic plate 31 for limiting position.

[0059] like Figure 3 、 Figure 4 As shown, in this embodiment, a plurality of third flow channel holes 341 are arranged at equal intervals on the gasket 34. Furthermore, in the circumferential direction of the pilot valve core 40, the distance between two adjacent third flow channel holes 341 is smaller than the channel diameter of the liquid outlet channel 101. This ensures that when the gasket 34 is assembled within the outer valve sleeve 10, the communication between the third flow channel holes 341 and the liquid outlet channel 101 is ensured. This allows the gasket 34 to be assembled to the outer valve sleeve 10 without directionality, thereby facilitating assembly of the gasket 34.

[0060] like Figure 4 As shown, in this embodiment, the spacer 35 includes a first spacer 351 and a second spacer 352, which are disposed on the inner and outer sides of the second flow channel hole 331. Furthermore, in the radial direction of the pilot valve core 40, the third flow channel hole 341 is partially disposed on the inner side of the second spacer 352. This ensures that the provision of the first spacer 351 and the second spacer 352 does not affect the communication between the second flow channel hole 331 and the third flow channel hole 341, thereby improving the assembly stability between the valve disc 33 and the gasket 34.

[0061] like Figure 2 、 Figure 3 As shown, in one embodiment, the pilot valve core 40 is configured as a sleeve structure. When the pilot valve core 40 is pushed against the partition 211 with the adjustment hole 21 on the main valve cover 20 by the electromagnetic assembly 50, the flow rate of the oil after passing through the partition 211 is minimized.

[0062] like Figure 2 As shown, in one embodiment, the electromagnet assembly 50 includes a fixed iron core 51, a moving iron core 52, a push rod 53 and a winding coil (not shown in the figure). The fixed iron core 51 and the winding coil are fixedly installed in the outer valve sleeve 10, and the push rod 53 passes through the moving iron core 52 and is fixedly connected to the moving iron core 52. In addition, one end of the push rod 53 passes through the fixed iron core 51 and abuts against the pilot valve core 40, so that the magnetic field generated after the winding coil is energized can drive the push rod 53 to push the pilot valve core 40 through the moving iron core 52, so as to drive the pilot valve core 40 to move toward the adjustment hole 21.

[0063] As can be seen from the above, when the pilot solenoid valve 100 of the present application is working, the electromagnet assembly 50 can control the pilot valve core 40 to perform reciprocating motion relative to the adjustment hole 21. By utilizing the different distances between the pilot valve core 40 and the adjustment hole 21, it is possible to control different flow rates of oil passing through the adjustment hole 21; in this process, the pilot valve core 40 can simultaneously drive the pilot valve plate 30 to move, and change the channel diameter of the oil flow channel 301 on the pilot valve plate 30, so as to achieve control of different flow rates of oil passing through the oil flow channel 301, and ultimately achieve control of the flow rate of oil introduced into the liquid inlet 23 and discharged from the liquid outlet 24, so as to achieve shock absorption adjustment when the automobile shock absorber is working. It should be noted that the working principle of how the oil introduced through the liquid inlet 23 by the main valve cover 20 of the pilot solenoid valve 100 of the present application flows to the liquid outlet 24 through the overflow valve assembly 25 and finally realizes the damping adjustment of the oil can adopt the conventional method in the existing automobile shock absorber, which will not be elaborated here.

[0064] In addition, the present application also provides an automobile shock absorber, comprising the pilot solenoid valve 100 described above.

[0065] The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0066] Those skilled in the art should recognize that the above embodiments are merely intended to illustrate the present invention and are not intended to limit the present invention. Any appropriate changes and modifications to the above embodiments are intended to fall within the scope of protection claimed by the present invention as long as they are within the spirit of the present invention.

Claims

1. A pilot-operated solenoid valve, characterized in that: The pilot-operated solenoid valve (100) comprises: Outer valve sleeve (10); A main valve cover (20) is partially inserted into the outer valve sleeve (10) and connected to the outer valve sleeve (10), and a liquid outlet channel (101) is formed between the portion of the main valve cover (20) located inside the outer valve sleeve (10) and the outer valve sleeve (10); an adjustment hole (21) is opened on the main valve cover (20); The pilot valve disc (30) is pressed and limited to the outer valve sleeve (10) by the main valve cover (20), and an oil flow channel (301) is formed on the pilot valve disc (30), and the oil flow channel (301) is respectively connected to the regulating hole (21) and the liquid outlet channel (101); A pilot valve core (40) is arranged opposite to the regulating hole (21) and is in driving connection with the pilot valve plate (30), and the pilot valve core (40) is capable of reciprocating relative to the regulating hole (21) to control the flow opening of the regulating hole (21) and change the flow diameter of the oil flow channel (301); The electromagnet assembly (50) is mounted on the outer valve sleeve (10) and abuts against the pilot valve core (40) to limit the position, and is used to push the pilot valve core (40) to move toward the regulating hole (21).

2. The pilot-operated solenoid valve according to claim 1, characterized in that: The pilot valve plate (30) comprises an elastic plate (31), a circulation valve plate (32) and a valve plate (33); the elastic plate (31), the circulation valve plate (32) and the valve plate (33) are sequentially mounted on the pilot valve core (40); and the elastic plate (31) abuts against the pilot valve core (40) to limit the position; A first flow channel hole (321) is formed on the circulation valve plate (32), and a second flow channel hole (331) is formed on the valve plate (33), and a portion of the first flow channel hole (321) can be connected to the liquid outlet channel (101) through the second flow channel hole (331) to form the oil flow channel (301); Part of the first flow channel hole (321) can be blocked by the elastic sheet (31), and the elastic sheet (31) can be driven by the pilot valve core (40) to separate from the circulation valve sheet (32) to release the seal of the part of the first flow channel hole (321) blocked by the elastic sheet (31).

3. The pilot-operated solenoid valve according to claim 2, characterized in that: The number of the first flow channel holes (321) is configured to be at least one; wherein each of the first flow channel holes (321) comprises an arc-shaped hole portion (3211) and a flow channel hole portion (3212) that are in communication with each other, the arc-shaped hole portion (3211) being in communication with the second flow channel hole (331), and the arc-shaped hole portion (3211) being capable of being blocked by the elastic sheet (31), and the flow channel hole portion (3212) being in communication with the regulating hole (21); Wherein, the second flow channel hole (331) is configured as an arc-shaped structure matching the arc-shaped hole portion (3211).

4. The pilot-operated solenoid valve according to claim 3, characterized in that: The number of the first flow channel holes (321) is configured to be multiple, and the multiple first flow channel holes (321) are evenly arranged on the circulation valve plate (32); The number of the second flow channel holes (331) is also configured to be multiple, and the multiple second flow channel holes (331) are evenly arranged on the valve plate (33), and the distance between two adjacent second flow channel holes (331) in the circumferential direction of the pilot valve core (40) is smaller than the length of the arc-shaped hole portion (3211) in the first flow channel hole (321) in the circumferential direction of the pilot valve core (40).

5. The pilot-operated solenoid valve according to claim 2, characterized in that: The elastic sheet (31) comprises a main sheet body (311) and a plurality of supporting arms (312), wherein the plurality of supporting arms (312) are sequentially arranged at intervals on the periphery of the main sheet body (311) and connected to the main sheet body (311); The main plate body (311) can be abutted and limited with the circulation valve plate (32) to block part of the first flow channel hole (321); one end of a plurality of support arms (312) away from the main plate body (311) is pressed and limited to the circulation valve plate (32) by the main valve cover (20), and the plurality of support arms (312) can be elastically deformed under the drive of the main plate body (311).

6. The pilot-operated solenoid valve according to claim 2, characterized in that: The pilot valve plate (30) further includes a gasket (34), which is sleeved on the pilot valve core (40) and abuts against the outer valve sleeve (10) for limiting position, wherein a third flow channel hole (341) is formed on the outer peripheral wall of the gasket (34), and the third flow channel hole (341) is communicated with the liquid outlet channel (101); A spacer (35) is provided between the gasket (34) and the valve plate (33), and the spacer (35) abuts against the gasket (34) and the valve plate (33) respectively to limit the position, so that the second flow channel hole (331) and the third flow channel hole (341) are communicated.

7. The pilot-operated solenoid valve according to claim 6, characterized in that: The spacer (35) comprises a first spacer (351) and a second spacer (352), wherein the first spacer (351) and the second spacer (352) are arranged on both inner and outer sides of the second flow channel hole (331); In the radial direction of the pilot valve core (40), the third flow channel hole (341) is partially arranged on the inner side of the second spacer (352).

8. The pilot-operated solenoid valve according to claim 6, characterized in that: The number of the third flow channel holes (341) is configured to be multiple, and the multiple third flow channel holes (341) are arranged on the gasket (34) at equal intervals; In the circumferential direction of the pilot valve core (40), the distance between two adjacent third flow channel holes (341) is smaller than the channel diameter of the liquid outlet channel (101).

9. The pilot-operated solenoid valve according to claim 1, characterized in that: The main valve cover (20) is connected to the outer valve sleeve (10) in an interference fit manner; The main valve cover (20) is provided with a notch (22), and the groove wall (221) of the notch (22) and the outer valve sleeve (10) are enclosed to form the liquid outlet channel (101).

10. An automobile shock absorber, characterized in that: A pilot-operated solenoid valve (100) comprising any one of claims 1 to 9.

Images