Damping valve device for shock absorber, shock absorber, suspension system and vehicle

Abstract

The utility model provides a damping valve device for a shock absorber, the shock absorber, a suspension system and a vehicle. The shock absorber is provided with a compression cavity and a recovery cavity, and the damping valve device comprises an electromagnetic driving valve and a flow adjusting valve. The flow regulating valve comprises an overflow valve seat provided with a fluid channel, an overflow valve body arranged on the side, away from the compression cavity, of the overflow valve seat, an overflow valve block movably arranged between the overflow valve seat and the overflow valve body, and a magnetic attraction element installed on the overflow valve seat. The overflow valve body is connected to the electromagnetic driving valve, the electromagnetic driving valve is used for providing driving force pointing to the overflow valve seat from the overflow valve body when powered on, the overflow valve plate is made of magnetic conductive materials, and the magnetic attraction element is used for providing magnetic attraction force pointing to the overflow valve seat from the overflow valve body for the overflow valve plate. Under the combined action of the driving force, the magnetic attraction force and fluid pressure acting on the overflow valve plate, the overflow valve plate moves relative to the overflow valve seat so as to adjust the flow of fluid flowing between the compression cavity and the recovery cavity through the fluid channel.

Description

Technical Field

[0001] The utility model relates to the technical field of shock absorbers, and in particular to a damping valve device for a shock absorber, a shock absorber, a suspension system and a vehicle. Background Art

[0002] In the related art, in order to improve the smoothness of vehicle driving, shock absorbers are usually installed in the vehicle's suspension system. Shock absorbers are usually equipped with a damping valve device for adjusting the damping force. The damping valve device includes a spring, an overflow valve seat, and an overflow valve plate located on the side of the overflow valve seat away from the shock absorber compression chamber. The spring is used to provide elastic force from the overflow valve plate to the overflow valve seat and will be repeatedly compressed and stretched during the shock absorption process. However, because the spring is repeatedly compressed and stretched at a high frequency and a large number of times, it is prone to poor durability, which will affect the normal use of the damping valve device and reduce the shock absorption effect of the shock absorber. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a damping valve device for a shock absorber, a shock absorber, a suspension system and a vehicle, wherein the damping valve device is provided with a magnetic attraction element, which can replace the spring to provide a magnetic attraction force from the overflow valve body to the overflow valve seat to the overflow valve plate, and the magnetic attraction element is free of wear and consumption during the use of the shock absorber, thereby solving the problem that the spring in the existing damping valve device is prone to poor durability, thereby ensuring the normal use of the damping valve device and the shock absorbing effect of the shock absorber.

[0004] In order to achieve the above-mentioned object, in a first aspect, the utility model provides a damping valve device for a shock absorber, wherein the shock absorber has a compression chamber and a recovery chamber, and the damping valve device comprises an electromagnetic drive valve and a flow regulating valve, wherein the flow regulating valve comprises:

[0005] A relief valve seat, provided with a fluid passage connecting the compression chamber and the recovery chamber;

[0006] A relief valve body is arranged on a side of the relief valve seat away from the compression chamber, the relief valve body is connected to the electromagnetic drive valve, and the electromagnetic drive valve is used to provide a driving force from the relief valve body to the relief valve seat when power is turned on;

[0007] a relief valve plate, movably disposed between the relief valve seat and the relief valve body, the relief valve plate being made of a magnetic conductive material; and

[0008] A magnetic attraction element is installed on the overflow valve seat, and the magnetic attraction element is used to provide a magnetic attraction force from the overflow valve body to the overflow valve seat to the overflow valve plate;

[0009] Wherein, under the combined action of the driving force, the magnetic attraction force, and the fluid pressure acting on the overflow valve plate, the overflow valve plate moves relative to the overflow valve seat to adjust the fluid flow rate flowing between the compression chamber and the recovery chamber through the fluid channel.

[0010] In one embodiment, the overflow valve seat is provided with a first mounting groove on a side away from the overflow valve plate, and the magnetic attraction element is provided in the first mounting groove;

[0011] And / or, a second mounting groove is formed on the outer peripheral wall of the overflow valve seat, and the magnetic attraction element is disposed in the second mounting groove.

[0012] In one embodiment, the overflow valve seat is provided with a plurality of first mounting grooves, and each of the first mounting grooves extends axially along the overflow valve seat; the magnetic attraction element includes a plurality of first permanent magnets, and the plurality of first permanent magnets are installed in the plurality of first mounting grooves in a one-to-one correspondence.

[0013] In one embodiment, the overflow valve seat is provided with a second mounting groove, the second mounting groove extends along the circumference of the overflow valve seat, and the magnetic attraction element includes an annular permanent magnet, and the annular permanent magnet is correspondingly mounted in the second mounting groove;

[0014] Alternatively, the overflow valve seat is provided with a plurality of second mounting grooves, and the plurality of second mounting grooves are distributed at intervals along the circumference of the overflow valve seat, and each of the second mounting grooves extends along the circumference of the overflow valve seat or extends along the axial direction of the overflow valve seat, and the magnetic attraction element includes a plurality of second permanent magnets, and the plurality of second permanent magnets are correspondingly installed in the plurality of second mounting grooves.

[0015] In one embodiment, the second mounting groove is located at one end of the outer peripheral wall of the overflow valve seat close to the overflow valve body.

[0016] In one embodiment, the magnetic elements are distributed in a centrally symmetrical manner about the axis of the overflow valve seat.

[0017] In one embodiment, the fluid channel includes an overflow chamber and an overflow groove, the overflow chamber passes through the axial ends of the overflow valve seat and connects the compression chamber and the restoration chamber, and the overflow groove extends along the radial direction of the overflow valve seat and connects the overflow chamber and the restoration chamber;

[0018] The overflow valve plate moves relative to the overflow valve seat until it is in contact with the overflow valve seat, so that the flow rate of the fluid channel is reduced; the overflow valve plate moves relative to the overflow valve seat until it is separated from the overflow valve seat, so that the flow rate of the fluid channel increases as the distance between the overflow valve plate and the overflow valve seat increases.

[0019] In one embodiment, at least two guide structures are provided at one end of the overflow valve seat close to the overflow valve body, and an accommodating space is defined between the at least two guide structures. The overflow valve plate is accommodated in the accommodating space, and the at least two guide structures are used to limit the axial movement of the overflow valve plate along the overflow valve seat in the accommodating space.

[0020] In one embodiment, the guide structure extends along the axial direction of the overflow valve seat by 1 mm to 1.2 mm.

[0021] In one embodiment, an annular convex convex is provided at an end of the overflow valve seat close to one end of the overflow valve body, the annular convex convex is located in the accommodating space, and the overflow valve plate moves relative to the overflow valve seat to fit with the annular convex convex so as to reduce the flow rate of the fluid channel;

[0022] Wherein, the annular convex rib is provided with at least one overflow groove.

[0023] In a second aspect, the utility model provides a shock absorber, comprising a damping valve device for a shock absorber as described in any of the above embodiments.

[0024] In a third aspect, the utility model provides a suspension system, comprising the shock absorber as described above.

[0025] In a fourth aspect, the utility model provides a vehicle, comprising the suspension system as described above.

[0026] Compared with the prior art, the utility model has the following beneficial effects: in the damping valve device, shock absorber, suspension system and vehicle for the shock absorber provided by the embodiments of the utility model, the damping valve device provides a magnetic attraction element to replace the spring to provide a magnetic attraction force from the overflow valve body to the overflow valve seat to the overflow valve plate, and the magnetic attraction element is not worn or consumed during the use of the shock absorber, thereby solving the problem of poor durability of the spring in the existing damping valve device, thereby ensuring the normal use of the damping valve device and ensuring the shock absorbing effect of the shock absorber.

[0027] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solution of the embodiments of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. Obviously, the drawings described below are some implementation modes of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 It is a structural schematic diagram of a shock absorber provided in one embodiment of the utility model.

[0030] Figure 2 yes Figure 1 The schematic diagram of the local structure of the shock absorber when working in the compression stage.

[0031] Figure 3 yes Figure 1 The schematic diagram of the local structure of the shock absorber shown is when it is working in the recovery stage.

[0032] Figure 4 yes Figure 1 The three-dimensional structural schematic diagram of the overflow valve seat shown in one of the viewing angles.

[0033] Figure 5 yes Figure 1 The three-dimensional structural schematic diagram of the overflow valve seat shown in another perspective.

[0034] Figure 6 yes Figure 1 Schematic diagram of the three-dimensional structure of the overflow valve plate shown.

[0035] Description of main reference numerals:

[0036] 100. shock absorber; 1. cylinder; 11. oil storage cylinder; 12. working cylinder; 13. bottom valve; 121. compression chamber; 122. recovery chamber; 2. piston rod; 21. connecting cylinder; 3. damping valve device; 31. valve sleeve; 311. upper valve body; 312. lower valve body; 313. piston valve body; 32. electromagnetic drive valve; 321. coil; 322. core cover; 323. magnetic core; 324. magnetic isolation Ring; 325, pilot valve stem; 326, pilot valve plug; 33, flow control valve; 331, overflow valve seat; 3311, overflow chamber; 3312, overflow groove; 3313, guide structure; 3314, annular convex rafter; 3315, top stop step; 3316, first mounting groove; 332, overflow valve body; 333, overflow valve plate; 3331, through hole; 334, magnetic element; 34, piston valve. DETAILED DESCRIPTION

[0037] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0038] See also Figure 1The embodiment of the utility model provides a shock absorber 100 for achieving shock absorption of a vehicle. The shock absorber 100 comprises a cylinder 1, a piston rod 2 movably inserted into the cylinder 1, and a damping valve device 3 connected to one end of the piston rod 2 extending into the cylinder 1. The damping valve device 3 can follow the piston rod 2 to reciprocate in the cylinder 1 along the axial direction of the cylinder 1 to adjust the damping force of the shock absorber 100 during the shock absorption process.

[0039] Specifically, Figure 1 As shown, in one embodiment of the present invention, the cylinder 1 includes an oil storage cylinder 11 as an outer cylinder, a working cylinder 12 as an inner cylinder, and a bottom valve 13 connected between the bottom ends of the oil storage cylinder 11 and the bottom ends of the working cylinder 12. The working cylinder 12 is arranged in the oil storage cylinder 11, and the bottom valve 13 is provided with a through hole for connecting the inner cavity of the oil storage cylinder 11 and the inner cavity of the working cylinder 12. Similar to the structure of the existing double-tube shock absorber, the inner cavities of the oil storage cylinder 11 and the working cylinder 12 both store fluid (oil or gas). Generally, the lower cavity of the oil storage cylinder 11 stores oil, the upper cavity of the oil storage cylinder 11 stores inert gas, and the inner cavity of the working cylinder 12 is filled with oil. The oil stored in the oil storage cylinder 11 and the oil stored in the working cylinder 12 can flow through the through hole of the bottom valve 13. The oil storage cylinder 11, the working cylinder 12 and the bottom valve 13 can respectively adopt the oil storage cylinder, the working cylinder and the bottom valve of the existing double-tube shock absorber, and the specific structure will not be described in detail here.

[0040] like Figure 1 As shown, in one embodiment of the present invention, one end of the piston rod 2 passes through the upper openings of the oil storage cylinder 11 and the working cylinder 12 in sequence, and then extends into the inner cavity of the working cylinder 12. The end of the piston rod 2 exposed from the cylinder 1 is used to connect to the vehicle body, and the end of the cylinder 1 away from the end of the piston rod 2 (i.e. Figure 1 The bottom end shown in the figure is used to connect the wheel. When the wheel is stimulated by the road surface and generates relative movement with the vehicle body, the piston rod 2 can drive the damping valve device 3 to reciprocate up and down along the inner wall of the working cylinder 12 of the cylinder barrel 1. Similar to the structure of the existing double-tube shock absorber, a sealing structure is provided between the piston rod 2 and the upper opening of the oil storage cylinder 11 and between the piston rod 2 and the upper opening of the working cylinder 12. The piston rod 2 can adopt the existing shock absorber piston rod, and the sealing structure can adopt the existing sealing structure (not limited to oil seals, end covers and other seals), and the specific structure will not be repeated here.

[0041] like Figure 1As shown, in an embodiment of the utility model, the damping valve device 3 is slidably contacted and cooperated with the inner wall of the working cylinder 12, and divides the inner cavity of the working cylinder 12 into a compression chamber 121 and a recovery chamber 122, the compression chamber 121 is located on the side of the damping valve device 3 close to the bottom valve 13, and the recovery chamber 122 is located on the side of the damping valve device 3 away from the bottom valve 13.

[0042] In the embodiment of the present utility model, the damping valve device 3 can adjust the oil flow rate between the compression chamber 121 and the recovery chamber 122 when following the piston rod 2 to move back and forth in the cylinder 1. Figure 2 and Figure 3 In an embodiment of the utility model, the damping valve device 3 includes a valve sleeve 31, an electromagnetic drive valve 32 and a flow regulating valve 33. The valve sleeve 31 is connected to one end of the piston rod 2 extending into the working cylinder 12, and a first accommodating space is defined between the valve sleeve 31 and the piston rod 2, and the electromagnetic drive valve 32 and the flow regulating valve 33 are arranged in the first accommodating space. The flow regulating valve 33 includes an overflow valve seat 331, an overflow valve body 332, an overflow valve plate 333 and a magnetic element 334. More specifically, as Figure 2 and Figure 3 As shown, in the embodiment of the utility model, the relief valve seat 331 is located between the compression chamber 121 and the recovery chamber 122 and is provided with a fluid channel (described in detail later) connecting the compression chamber 121 and the recovery chamber 122, and the relief valve body 332 is provided on the side of the relief valve seat 331 away from the compression chamber 121; the relief valve body 332 is connected to the electromagnetic drive valve 32, and the electromagnetic drive valve 32 is used to provide the pressure relief valve 331 when the power is turned on. The overflow valve body 332 is directed toward the overflow valve seat 331 by a driving force, and the driving force can drive the overflow valve body 332 to approach the overflow valve seat 331; the overflow valve plate 333 is movably arranged between the overflow valve seat 331 and the overflow valve body 332, and the overflow valve plate 333 is made of a magnetic conductive material (not limited to silicon steel and permalloy), and the overflow valve plate 333 is provided with a through hole 3331 (see Figure 6 ); the magnetic element 334 is installed on the overflow valve seat 331, and the magnetic element 334 is used to provide a magnetic attraction force from the overflow valve body 332 to the overflow valve seat 331 to the overflow valve plate 333.

[0043] It should be noted that, in an embodiment of the utility model, when the damping valve device 3 follows the piston rod 2 to reciprocate in the cylinder 1 so that the shock absorber 100 plays a shock absorbing role, the fluid pressure generated by the oil flowing between the compression chamber 121 and the restoration chamber 122 through the damping valve device 3 will act on the overflow valve plate 333. Under the combined action of the driving force, the magnetic attraction force, and the fluid pressure acting on the overflow valve plate 333, the overflow valve plate 333 can move relative to the overflow valve seat 331 to adjust the fluid flow between the compression chamber 121 and the restoration chamber 122 through the fluid channel of the overflow valve seat 331.

[0044] Specifically, in the embodiment of the present invention, the driving force generated by the electromagnetic drive valve 32 after being energized will push the relief valve body 332 to move toward the relief valve seat 331, thereby pushing the relief valve plate 333 to move to fit against the relief valve seat 331, thereby closing part of the fluid passage in the relief valve seat 331 (see Figure 2 Path A in the Figure 2 As shown, when the shock absorber 100 works in the compression stage, the oil flows from the compression chamber 121 to the restoration chamber 122, and the oil will generate an upward (i.e., toward the restoration chamber 122) fluid pressure on the overflow valve plate 333 and the overflow valve body 332 that pushes the overflow valve plate 333. When the fluid pressure is greater than the sum of the driving force provided by the electromagnetic drive valve 32 and the magnetic attraction provided by the magnetic attraction element 334, the oil will push open the overflow valve plate 333 and the overflow valve body 332, so that the passage A that is closed by the fluid channel is opened. At this time, the fluid channel of the overflow valve seat 331 is completely opened, and the fluid flow rate flowing between the compression chamber 121 and the restoration chamber 122 through the fluid channel is relatively large. Furthermore, when the shock absorber 100 is working in the final stage of the compression stage, as the oil in the compression chamber 121 decreases, the fluid pressure gradually decreases. When the fluid pressure is less than the sum of the driving force and the magnetic force, the overflow valve body 332 pushes the overflow valve plate 333 again to fit the overflow valve seat 331, thereby closing the passage A of the fluid channel. It is not difficult to understand that when the driving force provided by the electromagnetic drive valve 32 is small or the electromagnetic drive valve 32 is not powered on and fails to provide the driving force, when the fluid pressure is less than the magnetic force, the overflow valve plate 333 will be adsorbed by the magnetic force to fit the overflow valve seat 331, which can also close the passage A of the fluid channel. Figure 3As shown, when the shock absorber 100 works in the recovery stage, the oil flows from the recovery chamber 122 to the compression chamber 121, and the overflow valve plate 333 is kept in contact with the overflow valve seat 331 under the action of the magnetic attraction force to close the passage A of the fluid channel. The oil flowing into the fluid channel of the overflow valve seat 331 will pass through the through hole 3331 of the overflow valve plate 333 to generate an upward fluid pressure to react on the overflow valve body 332, so that the overflow valve body 332 moves in a direction away from the overflow valve seat 331 and separates from the overflow valve plate 333. It can be understood that when the shock absorber 100 works in the last stage of the compression stage or in the recovery stage, the passage A of the fluid channel is closed, so the fluid flow rate flowing between the compression chamber 121 and the recovery chamber 122 through the fluid channel is reduced.

[0045] To sum up, in the shock absorber 100 provided by the utility model, the damping valve device 3 provides a magnetic attraction force from the overflow valve body 332 to the overflow valve seat 331 to the overflow valve plate 333 by setting a magnetic attraction element 334 instead of a spring. The magnetic attraction element 334 is not worn or consumed during the use of the shock absorber 100, which solves the problem of poor durability of the spring in the existing damping valve device, thereby ensuring the normal use of the damping valve device 3 and ensuring the shock absorption effect of the shock absorber 100.

[0046] It should be noted that, in the embodiment of the utility model, the damping valve device 3 further comprises a piston valve 34 arranged on the side of the flow regulating valve 33 away from the electromagnetic drive valve 32, the magnetic element 334 can be but not limited to a neodymium iron boron permanent magnet or a ferrite permanent magnet, and the magnetic element 334 can be installed on the overflow valve seat 331 in different ways. Figure 1 To Attachment Figure 6 , the specific structure of the shock absorber 100 provided by the utility model is further described in detail.

[0047] Please combine Figures 3 to 5In one embodiment of the present utility model, the overflow valve seat 331 is a rotating body structure that is roughly in the shape of a cap, and the cross section of the overflow valve seat 331 is annular. The overflow valve seat 331 is provided with an overflow chamber 3311 and an overflow groove 3312, wherein the overflow chamber 3311 passes through both axial ends of the overflow valve seat 331 and connects the compression chamber 121 and the recovery chamber 122, and the overflow groove 3312 extends along the radial direction of the overflow valve seat 331 and connects the overflow chamber 3311 and the recovery chamber 122, and the overflow chamber 3311 and the overflow groove 3312 together constitute a fluid channel of the overflow valve seat 331. In this embodiment, the overflow valve disc 333 moves relative to the overflow valve seat 331 until it is in contact with the overflow valve seat 331, and the overflow valve disc 333 and the overflow valve body 332 jointly cover at least part of the opening of the overflow chamber 3311 close to the restoration chamber 122, so that the passage A of the fluid channel is closed, and the oil flows between the compression chamber 121 and the restoration chamber 122 through the overflow groove 3312, thereby reducing the flow rate of the fluid channel; the overflow valve disc 333 moves relative to the overflow valve seat 331 until it is separated from the overflow valve seat 331, so that the passage A of the fluid channel is opened, and the oil flows between the compression chamber 121 and the restoration chamber 122 through the overflow chamber 3311 and the overflow groove 3312 at the same time, thereby increasing the flow rate of the fluid channel as the distance between the overflow valve disc 333 and the overflow valve seat 331 increases.

[0048] Further, such as Figure 4 As shown, in one embodiment of the present utility model, at least two guide structures 3313 are provided at one end of the overflow valve seat 331 close to the overflow valve body 332, and a second accommodating space is defined between the at least two guide structures 3313. The overflow valve plate 333 is accommodated in the second accommodating space, and the at least two guide structures 3313 are used to limit the axial movement of the overflow valve plate 333 along the overflow valve seat 331 in the second accommodating space (see Figure 2 and Figure 3 ). The guide structure 3313 may be, but is not limited to, an existing guide structure such as a guide column or a guide block. Figure 4 In the example, the number of the guide structures 3313 is plural (3 or more), and each guide structure 3313 is a guide column protruding from one end of the overflow valve seat 331 close to the overflow valve body 332. Figure 4 In the example of , the plurality of guide structures 3313 are centrally symmetrically distributed about the axis of the overflow valve seat 331 to improve the stability of the overflow valve plate 333 moving in the second accommodation space. Figure 4In the example, the extension dimension of the guide structure 3313 along the axial direction of the overflow valve seat 331 is 1 mm to 1.2 mm. By setting the extension dimension of the guide structure 3313, not only can sufficient moving space be provided for the overflow valve plate 333 to meet the requirement of the damping valve device 3 for continuously adjusting the damping force, but also it can be ensured that the overflow valve plate 333 always moves relative to the overflow valve seat 331 in the second accommodating space and will not separate from between the overflow valve seat 331 and the overflow valve body 332, thereby ensuring the normal use of the damping valve device 3.

[0049] Further, such as Figure 4 As shown, in one embodiment of the present invention, an annular protrusion 3314 is provided at the end of the overflow valve seat 331 close to the overflow valve body 332. The annular protrusion 3314 is located in the second accommodation space. The overflow valve plate 333 moves relative to the overflow valve seat 331 to fit with the annular protrusion 3314 to reduce the flow rate of the fluid channel. Figure 4 In the example of , the annular convex 3314 is provided with at least one notch, and each notch constitutes an overflow groove 3312. Figure 4 In the example of the present invention, the annular convex 3314 is provided with a plurality of overflow grooves 3312, and the plurality of overflow grooves 3312 are centrally symmetrically distributed about the axis of the overflow valve seat 331, so as to improve the uniformity and stability of the oil when it flows through the overflow grooves 3312. It should be noted that in the embodiment of the present utility model, the surface of the overflow valve seat 331 for contacting the overflow valve plate 333 (i.e. Figure 4 The upper surface of the annular convex 3314 and the surface of the overflow valve plate 333 for contacting the overflow valve seat 331 are all smooth sealing surfaces.

[0050] It should be noted that if Figure 4 As shown, in one embodiment of the present utility model, the outer peripheral wall of the overflow valve seat 331 is provided with a threaded structure and a top stop step 3315, and the threaded structure and the top stop step 3315 are used to realize the detachable connection between the overflow valve seat 331 and the lower valve body 312 of the valve sleeve 31, and its specific connection structure is similar to the connection structure between the existing overflow valve seat and the lower valve body, which will not be repeated here.

[0051] Please also read Figure 3 and Figure 5In one embodiment of the present invention, the overflow valve seat 331 is provided with a first installation groove 3316 from a side away from the overflow valve plate 333, and the magnetic element 334 is disposed in the first installation groove 3316. That is, in this embodiment, the magnetic element 334 is mounted on a side of the overflow valve seat 331 away from the overflow valve plate 333.

[0052] Preferably, Figure 3 and Figure 5 In the example, the overflow valve seat 331 is provided with a plurality of the first mounting grooves 3316, and each of the first mounting grooves 3316 extends along the axial direction of the overflow valve seat 331; the magnetic element 334 includes a plurality of first permanent magnets, and the plurality of first permanent magnets are installed in the plurality of first mounting grooves 3316 one by one. More preferably, the magnetic element 334 is centrally symmetrically distributed about the axis of the overflow valve seat 331. In this embodiment, the magnetic element 334 is configured to include the plurality of first permanent magnets, and the plurality of first permanent magnets are centrally symmetrically distributed about the axis of the overflow valve seat 331, which can ensure that the magnetic element 334 provides a uniform and stable magnetic attraction force to the overflow valve plate 333, thereby ensuring that the overflow valve plate 333 can move relative to the overflow valve seat 331 under the combined action of the driving force, the magnetic attraction force and the aforementioned fluid pressure, so as to achieve the purpose of adjusting the damping force. It should be noted that in Figure 5 In the example, the extension depth of the first mounting groove 3316 along the axial direction of the overflow valve seat 331 should be appropriate so that the corresponding first permanent magnet and the overflow valve plate 333 are kept in a suitable relative position, so as to ensure that the magnetic attraction force provided by the magnetic attraction element 334 composed of the plurality of first permanent magnets is appropriate, and to avoid the magnetic attraction force being too large or too small to affect the adjustment of the damping force. The extension depth of the first mounting groove 3316 can be analyzed and determined according to the actual demand for the damping force to be adjusted by the damping valve device 3, which will not be elaborated. It should also be noted that in Figure 5 In the example, the first permanent magnet may be a cylinder or a cuboid or other shapes, and the first mounting groove is adapted to the shape of the first permanent magnet.

[0053] In another embodiment of the utility model, the outer peripheral wall of the overflow valve seat 331 may be provided with a second mounting groove, and the magnetic element 334 is arranged in the second mounting groove. That is, in this embodiment, the magnetic element 334 is assembled and installed on the outer peripheral wall of the overflow valve seat 331. Optionally, in a possible embodiment, the overflow valve seat 331 is provided with an annular second mounting groove, the second mounting groove extends along the circumference of the overflow valve seat 331, and the magnetic element 334 includes an annular permanent magnet, and the annular permanent magnet is correspondingly installed in the second mounting groove. In another possible embodiment, the overflow valve seat 331 may be provided with a plurality of second mounting grooves, the plurality of second mounting grooves are distributed at intervals along the circumference of the overflow valve seat 331, each of the second mounting grooves extends along the circumference of the overflow valve seat 331 or along the axial direction of the overflow valve seat 331, and the magnetic element 334 includes a plurality of second permanent magnets, and the plurality of second permanent magnets are correspondingly installed in the plurality of second mounting grooves. By arranging an annular permanent magnet on the outer peripheral wall of the overflow valve seat 331 or distributing a plurality of second permanent magnets at intervals, a uniform magnetic attraction force can also be provided to ensure that the overflow valve plate 333 can move relative to the overflow valve seat 331 under the combined action of the driving force, the magnetic attraction force and the aforementioned fluid pressure, thereby achieving the purpose of adjusting the damping force. Preferably, in any of the above-mentioned embodiments, the second mounting groove is located at one end of the outer peripheral wall of the overflow valve seat 331 close to the overflow valve body 332, so that the corresponding annular permanent magnet or second permanent magnet can be maintained at a suitable relative position with the overflow valve plate 333, so as to ensure that the magnetic attraction element 334 provides an appropriate magnetic attraction force.

[0054] Of course, in another embodiment of the present invention, the magnetic element 334 can also be simultaneously assembled on the outer peripheral wall of the overflow valve seat 331 and the side of the overflow valve seat 331 away from the overflow valve plate 333 in the above-mentioned manner, which is not elaborated herein.

[0055] Please refer again Figure 2 and Figure 3In one embodiment of the utility model, the end of the piston rod 2 extending into the working cylinder 12 is provided with a connecting tube 21, and the valve sleeve 31 of the damping valve device 3 includes an upper valve body 311 connected to the connecting tube 21, a lower valve body 312 connected to the upper valve body 311 and the overflow valve seat 331, and a piston valve body 313 connected to the lower valve body 312 and slidably contacting and cooperating with the inner wall of the working cylinder 12, and a piston ring is provided on the outer peripheral wall of the piston valve body 313 to play a sealing and guiding role. Among them, the upper valve body 311, the lower valve body 312 and the piston valve body 313 are all rotating body structures with a roughly annular cross section, and the specific structures of the upper valve body 311, the lower valve body 312 and the piston valve body 313 are similar to those of the existing valve body, and no further description is given. Optionally, the connection between the connecting tube 21 and the upper valve body 311, the connection between the lower valve body 312 and the upper valve body 311 and the overflow valve seat 331, and the connection between the piston valve body 313 and the lower valve body 312 can be any connection method such as threaded connection and snap-on connection, and there is no limitation on this.

[0056] like Figure 2 and Figure 3 As shown, in one embodiment of the present utility model, the electromagnetic drive valve 32 is arranged in the space defined by the upper valve body 311 and the connecting tube 21, the flow regulating valve 33 is arranged in the space defined by the upper valve body 311 and the lower valve body 312, and the aforementioned piston valve 34 is arranged between the lower valve body 312 and the piston valve body 313. The piston valve 34 is provided with a connecting portion connecting the compression chamber 121 and the overflow chamber 3311 (see Figure 4 ) of the piston channel, the specific structure of the piston valve 34 is similar to the structure of the piston valve of the existing damping valve device, and is not limited to this.

[0057] Optionally, in the embodiment of the present utility model, the electromagnetic drive valve 32 may be a direct-drive electromagnetic drive valve or a pilot-operated electromagnetic drive valve. Figure 2 and Figure 3 In the example, the electromagnetic drive valve 32 adopts a pilot electromagnetic drive valve, and the overflow valve body 332 is constructed with a pilot channel. The pilot channel is connected to the pilot channel of the overflow chamber 3311 through the through hole 3331 of the overflow valve plate 333. The electromagnetic drive valve 32 is used to control the opening and closing of the pilot channel, thereby increasing the flow rate of oil flowing between the compression chamber 121 and the recovery chamber 122 through the damping valve device 3.

[0058] Specifically, Figure 2 and Figure 3As shown, similar to the structure of the existing pilot electromagnetic drive valve, the electromagnetic drive valve 32 includes a coil 321, an iron core cover 322, a magnetic core 323, a magnetic isolation ring 324, a pilot valve stem 325, and a pilot valve plug 326 connected to the pilot valve stem 325. When the coil 321 is energized, the pilot valve plug 326 is driven to block the pilot channel of the overflow valve body 332. When the fluid pressure of the oil flowing into the pilot channel through the through hole 3331 of the overflow valve plate 333 and the overflow chamber 3311 is greater than the driving force of the electromagnetic drive valve 32, the pilot valve plug 326 is pushed to move in a direction away from the overflow valve seat 331, so that the pilot channel is opened, and the oil can flow between the compression chamber 121 and the recovery chamber 122 through the pilot channel, thereby increasing the flow rate of the oil. It is understandable that when the electromagnetic drive valve 32 adopts a pilot electromagnetic drive valve, its specific structure and working principle are similar to the structure and working principle of the existing pilot electromagnetic drive valve, which will not be described in detail.

[0059] Furthermore, an embodiment of the utility model also provides a suspension system, including a shock absorber. The shock absorber can adopt the shock absorber 100 in any of the above embodiments, so it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0060] Furthermore, an embodiment of the utility model further provides a vehicle, comprising the above suspension system, wherein the shock absorber in the suspension system can adopt the shock absorber 100 in any of the above embodiments, and thus at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0061] It should be noted that, in the embodiments of the present utility model, the vehicle may be any vehicle such as a fuel vehicle, an electric vehicle, etc. having a shock absorber, and this is not limited.

[0062] In the description of the present invention, the description with reference to the terms "embodiment", "specific embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0063] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A damping valve device for a shock absorber, wherein the shock absorber has a compression chamber and a recovery chamber, and the damping valve device comprises an electromagnetic drive valve and a flow regulating valve, characterized in that: The flow regulating valve comprises: A relief valve seat, provided with a fluid passage connecting the compression chamber and the recovery chamber; A relief valve body is arranged on a side of the relief valve seat away from the compression chamber, the relief valve body is connected to the electromagnetic drive valve, and the electromagnetic drive valve is used to provide a driving force from the relief valve body to the relief valve seat when power is turned on; a relief valve plate, movably disposed between the relief valve seat and the relief valve body, the relief valve plate being made of a magnetic conductive material; and A magnetic attraction element is installed on the overflow valve seat, and the magnetic attraction element is used to provide a magnetic attraction force from the overflow valve body to the overflow valve seat to the overflow valve plate; Wherein, under the combined action of the driving force, the magnetic attraction force, and the fluid pressure acting on the overflow valve plate, the overflow valve plate moves relative to the overflow valve seat to adjust the fluid flow rate flowing between the compression chamber and the recovery chamber through the fluid channel.

2. The damping valve device for a shock absorber according to claim 1, characterized in that: The overflow valve seat is provided with a first installation groove from a side away from the overflow valve plate, and the magnetic attraction element is arranged in the first installation groove; And / or, a second mounting groove is formed on the outer peripheral wall of the overflow valve seat, and the magnetic attraction element is disposed in the second mounting groove.

3. The damping valve device for a shock absorber according to claim 2, characterized in that: The overflow valve seat is provided with a plurality of first installation grooves, and each of the first installation grooves extends along the axial direction of the overflow valve seat; the magnetic attraction element includes a plurality of first permanent magnets, and the plurality of first permanent magnets are installed in the plurality of first installation grooves in a one-to-one correspondence.

4. The damping valve device for a shock absorber according to claim 2, characterized in that: The overflow valve seat is provided with a second mounting groove, the second mounting groove extends along the circumference of the overflow valve seat, the magnetic attraction element comprises an annular permanent magnet, and the annular permanent magnet is correspondingly mounted in the second mounting groove; Alternatively, the overflow valve seat is provided with a plurality of second mounting grooves, and the plurality of second mounting grooves are distributed at intervals along the circumference of the overflow valve seat, and each of the second mounting grooves extends along the circumference of the overflow valve seat or extends along the axial direction of the overflow valve seat, and the magnetic attraction element includes a plurality of second permanent magnets, and the plurality of second permanent magnets are correspondingly installed in the plurality of second mounting grooves.

5. The damping valve device for a shock absorber according to claim 4, characterized in that: The second mounting groove is located at one end of the outer peripheral wall of the overflow valve seat close to the overflow valve body.

6. The damping valve device for a shock absorber according to claim 1, characterized in that: The magnetic attraction elements are centrally symmetrically distributed about the axis of the overflow valve seat.

7. The damping valve device for a shock absorber according to claim 1, characterized in that: The fluid channel includes an overflow chamber and an overflow groove, wherein the overflow chamber passes through both axial ends of the overflow valve seat and communicates with the compression chamber and the restoration chamber, and the overflow groove extends along the radial direction of the overflow valve seat and communicates with the overflow chamber and the restoration chamber; The overflow valve plate moves relative to the overflow valve seat until it is in contact with the overflow valve seat, so that the flow rate of the fluid channel is reduced; the overflow valve plate moves relative to the overflow valve seat until it is separated from the overflow valve seat, so that the flow rate of the fluid channel increases as the distance between the overflow valve plate and the overflow valve seat increases.

8. The damping valve device for a shock absorber according to claim 7, characterized in that: At least two guide structures are provided at one end of the overflow valve seat close to the overflow valve body, and an accommodating space is defined between the at least two guide structures. The overflow valve plate is accommodated in the accommodating space, and the at least two guide structures are used to limit the axial movement of the overflow valve plate along the overflow valve seat in the accommodating space.

9. The damping valve device for a shock absorber according to claim 8, characterized in that: The guide structure has an axial extension dimension of 1 mm to 1.2 mm along the overflow valve seat.

10. The damping valve device for a shock absorber according to claim 8 or 9, characterized in that: An annular convex is provided at the end of the overflow valve seat close to one end of the overflow valve body, and the annular convex is located in the accommodating space. The overflow valve plate moves relative to the overflow valve seat to fit with the annular convex so as to reduce the flow rate of the fluid channel. Wherein, the annular convex rib is provided with at least one overflow groove.

11. A shock absorber, characterized in that: The invention comprises a damping valve device for a shock absorber according to any one of claims 1 to 10.

12. A suspension system, characterized in that: Comprising the shock absorber of claim 11.

13. A vehicle, characterized in that: Comprising the suspension system of claim 12.

Images