Damping valve, shock absorber and vehicle

Abstract

The utility model discloses a damping valve, a shock absorber and a vehicle. The damping valve comprises a valve shell. The valve seat is arranged in the valve shell; the valve body is arranged in the valve shell and can axially move relative to the valve seat; the valve plate comprises a fixing part and a turnover part, the turnover part is connected with the fixing part, the fixing part is fixed to the valve seat, the valve body selectively abuts against the turnover part, and the valve plate is constructed in the mode that a damping medium applies pressure to the valve plate so that the turnover part can generate elastic deformation and be lifted towards the valve body; and a first overflow channel is formed between the valve plate and the valve seat. In this way, the turnover part can generate elastic deformation and be lifted in the direction of the valve body so as to open the first overflow channel, the opening degree of the first overflow channel changes in proportion along with the flow of the damping medium, the valve plate deforms under the action of different pressures, continuous and controllable damping force can be formed, and therefore damping adjustment in different stages can be achieved.

Description

Technical Field

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

[0002] An automotive shock absorber is installed in the wheel area of a vehicle to reduce the bumpiness during vehicle driving. When relative movement occurs between the vehicle body and the wheels, the piston in the automotive shock absorber moves up and down, and the hydraulic fluid in the shock absorber cavity repeatedly flows from one cavity through different pores into another cavity, and converts the vibration energy into heat energy of the hydraulic fluid and gas and dissipates it into the atmosphere, so that the shock absorber can work efficiently within a relatively low temperature range.

[0003] In the related art, a plurality of cooperating built-in valve groups are included in the shock absorber. During the vibration of the shock absorber, the damping force of the built-in valve group is not easy to adjust, reducing the reliability of the shock absorber. Summary of the Utility Model

[0004] The utility model aims to at least solve one of the technical problems existing in the prior art. For this purpose, the utility model provides a damping valve. By fitting and fixing a valve plate on a valve seat, a damping medium pushes the valve plate to deform and lift towards the valve body to open a first overflow channel. The valve plate deforms under different pressures, and a continuous and controllable damping force can be formed.

[0005] The utility model further provides a shock absorber.

[0006] The utility model further provides a vehicle.

[0007] The damping valve according to the first aspect embodiment of the utility model includes: a valve housing; a valve seat provided in the valve housing; a valve body provided in the valve housing and axially movable relative to the valve seat; a valve plate including a fixing portion and a folding portion, the folding portion being connected to the fixing portion, the fixing portion being fixed to the valve seat, the valve body selectively abutting against the folding portion, the valve plate being configured such that a damping medium applies a pressure to the valve plate to cause the folding portion to elastically deform and lift towards the valve body, and a first overflow channel is formed between the valve plate and the valve seat.

[0008] According to the damping valve of the embodiment of the utility model, by fitting and fixing the valve plate on the valve seat, when a damping medium applies a pressure to the valve plate, the valve plate can elastically deform and lift towards the valve body, thereby opening the first overflow channel. The opening degree of the first overflow channel changes proportionally with the flow rate of the damping medium. In this way, the valve plate deforms under different pressures, and a continuous and controllable damping force can be formed, so that damping adjustment in different stages can be achieved.

[0009] According to some specific embodiments of the utility model, the valve plate is made of an elastic material.

[0010] According to some specific embodiments of the present utility model, the fixing part is fixed at the center of the valve seat, and the folding part is connected to the circumferential side of the fixing part and radially extends to the outer ends of the valve body and the valve seat.

[0011] According to some specific embodiments of the present utility model, it further includes: a connection component, the connection component includes a bolt and a nut, and the bolt passes through the fixing part and the valve seat and is threadedly connected to the nut.

[0012] According to some specific embodiments of the present utility model, it further includes: an elastic member, one end of the valve body facing the valve plate is provided with a concave cavity, the elastic member is arranged in the concave cavity, one end of the elastic member abuts against the bottom wall of the concave cavity and the other end abuts against the fixing part, and the elastic member is configured to apply an elastic force between the valve body and the valve plate so as to form a sixth overflow channel between the valve plate and the valve body.

[0013] According to some specific embodiments of the present utility model, it further includes: a guiding member, the guiding member is arranged in the concave cavity, and the elastic member is arranged on the guiding member and axially deforms relative to the guiding member.

[0014] According to some specific embodiments of the present utility model, one end of the valve seat adjacent to the valve body is provided with a first sinking groove, and the inner side wall of the first sinking groove is annularly arranged on the outer circumference where the valve body abuts against the folding part.

[0015] According to some specific embodiments of the present utility model, a first through groove is formed on the side wall of the first sinking groove, and the first through groove constitutes a second overflow channel connecting the valve seat and the valve housing.

[0016] According to some specific embodiments of the present utility model, a plurality of first overflow through holes are axially arranged on the folding part, and a plurality of second overflow through holes corresponding to the first overflow through holes are axially arranged on the valve seat.

[0017] According to some specific embodiments of the present utility model, a plurality of circumferentially distributed third overflow through holes are formed on the side wall of the valve housing, and the third overflow through holes are arranged corresponding to the first overflow channel in the radial direction.

[0018] According to some specific embodiments of the present utility model, the outer side wall of the valve body is in sealing fit with the inner side wall of the valve housing, an annular rib is provided on the inner bottom wall of the valve housing far from the valve seat, and a second sinking groove is provided at one end of the valve body far from the valve seat, and the second sinking groove is in sealing fit with the annular rib.

[0019] According to some specific embodiments of the present utility model, a slope structure is formed on the outer sidewall of the second sink groove and forms a sealing space with the inner sidewall of the valve housing, and a fourth overflow through hole communicating with the sealing space is formed on the sidewall of the valve housing; a first overflow hole is formed on the sidewall of the valve body, and the first overflow hole extends radially along the valve body to the central hole of the valve body. The opening of the central hole faces one end of the valve body away from the valve seat. A second overflow hole is formed on the slope structure, and the second overflow hole extends axially along the valve body to communicate with the first overflow hole. The first overflow through hole and the first overflow hole are connected to form a third overflow channel.

[0020] According to some specific embodiments of the present utility model, it further includes: a pilot control component, and the pilot control component includes a pilot member, and the pilot member can axially move to block or open the central hole.

[0021] According to some specific embodiments of the present utility model, the pilot control component further includes: an electromagnetic coil; an electromagnet core, the electromagnet core is arranged in the electromagnetic coil, one end of the pilot member is arranged in the electromagnet core, and the other end passes through the valve body and is detachably fitted with the central hole.

[0022] According to some specific embodiments of the present utility model, a fifth overflow through hole axially penetrating is arranged inside the valve body, and the fifth overflow through hole constitutes a fourth overflow channel penetrating the valve body.

[0023] The shock absorber according to the second aspect embodiment of the present utility model includes the damping valve described above.

[0024] According to some specific embodiments of the present utility model, the shock absorber further includes: a cylinder body, the cylinder body includes a first cylinder body and a second cylinder body sleeved from outside to inside in sequence, a liquid storage cavity is defined between the first cylinder body and the second cylinder body, and a flow through hole is formed on the second cylinder body; a piston, the piston is movably arranged inside the second cylinder body, the piston divides the inside of the second cylinder body into a recovery cavity and a compression cavity, a piston valve is arranged on the piston to control the connection and disconnection between the recovery cavity and the compression cavity, the recovery cavity is communicated with the liquid storage cavity through the flow through hole, and the damping valve is arranged inside the piston and at one end of the piston valve away from the compression cavity.

[0025] According to some specific embodiments of the present utility model, the piston further includes: a piston rod, the outer sidewall of one end of the valve body is threadedly connected with the inner sidewall of the piston rod, and the outer sidewall of the other end is threadedly connected with the inner sidewall of the piston valve, and the piston rod can axially move inside the second cylinder body.

[0026] The vehicle according to the third aspect embodiment of the present utility model includes the shock absorber described above.

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

[0028] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0029] Figure 1 is a cross-sectional view of a shock absorber according to an embodiment of the present utility model;

[0030] Figure 2 1 is a partial structural diagram of a damping valve according to an embodiment of the present utility model;

[0031] Figure 3 1 is a schematic structural diagram of a valve seat according to an embodiment of the present utility model;

[0032] Figure 4 This is a three-dimensional diagram of the valve seat and valve plate fitted together according to an embodiment of the utility model;

[0033] Figure 5 This is a cross-sectional view of the valve seat and valve plate in contact with each other according to an embodiment of the present utility model;

[0034] Figure 6 This is a three-dimensional diagram of a valve disc lifted relative to a valve seat according to an embodiment of the present utility model;

[0035] Figure 7 is a cross-sectional view of a valve disc lifted relative to a valve seat according to an embodiment of the present utility model;

[0036] Figure 8 This is a schematic structural diagram of a valve plate according to an embodiment of the present utility model;

[0037] Figure 9 is a three-dimensional diagram of a valve body according to an embodiment of the present utility model;

[0038] Figure 10 is a top view of a valve body according to an embodiment of the present utility model;

[0039] Figure 11 yes Figure 10 AA cross-sectional view;

[0040] Figure 12 yes Figure 10 BB cross-sectional view;

[0041] Figure 13 1 is a schematic structural diagram of a valve housing according to an embodiment of the present utility model;

[0042] Figure 14Schematic diagram of the structure of the first valve housing according to an embodiment of the present utility model;

[0043] Figure 15 Schematic diagram of the structure of the second valve housing according to an embodiment of the present utility model;

[0044] Figure 16 Cross-sectional view of the piston rod moving upward when the shock absorber is not powered on according to an embodiment of the present utility model;

[0045] Figure 17 Cross-sectional view of the piston rod moving downward when the shock absorber is not powered on according to an embodiment of the present utility model;

[0046] Figure 18 Cross-sectional view of the piston rod moving upward when the shock absorber is powered on according to an embodiment of the present utility model Figure 1 ;

[0047] Figure 19 Cross-sectional view of the piston rod moving upward when the shock absorber is powered on according to an embodiment of the present utility model Figure 2 ;

[0048] Figure 20 Cross-sectional view of the piston rod moving downward when the shock absorber is powered on according to an embodiment of the present utility model.

[0049] Reference numerals:

[0050] 1. Valve housing; 101. Third overflow through hole; 102. Annular rib; 103. Fourth overflow through hole; 104. First valve body; 105. Second valve body; 2. Valve seat; 201. First sink; 202. First through groove; 203. Second overflow through hole; 3. Valve body; 301. Concave cavity; 302. Second sink; 303. Inclined surface structure; 304. First overflow hole; 305. Central hole; 306. Second overflow hole; 307. Fifth overflow through hole; 4. Valve plate; 401. First overflow through hole; 402. Fixed part; 403. Folded part; 5. First overflow channel; 6. Connection component; 601. Bolt; 602. Nut; 7. Elastic member; 8. Guide member; 9. Sealed space; 10. Pilot member; 11. Electromagnetic coil; 12. Electromagnet core; 13. Cylinder; 1301. First cylinder; 1302. Second cylinder; 14. Liquid storage cavity; 15. Recovery cavity; 16. Compression cavity; 17. Piston valve; 18. Piston rod; 19. Coil bracket; 20. Plastic cap; 21. Metal core cover; 22. Metal cap; 23. First guide sleeve; 24. First spring; 25. Second spring; 26. Magnetic isolation ring; 27. Sealing ring; 28. Second guide sleeve; 29. Bottom valve; 30. Second overflow channel; 31. Third overflow channel; 32. Fourth overflow channel; 33. Fifth overflow channel. Detailed implementation manners

[0051] Embodiments of the present utility model will be described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Embodiments of the present utility model will be described in detail below.

[0052] Reference will be made below to Figures 1 - 20 describe a damping valve and a shock absorber according to an embodiment of the present utility model.

[0053] As Figures 1 - 5 shown, the damping valve includes: a valve housing 1, a valve seat 2, a valve body 3, and a valve plate 4. The valve seat 2 and the valve body 3 are both provided inside the valve housing 1, and the valve body 3 can axially move relative to the valve seat 2.

[0054] Among them, the valve plate 4 includes a fixing portion 402 and a folding portion 403. The folding portion 403 is connected to the fixing portion 402. The fixing portion 402 is fixed to the valve seat 2, and the valve body 3 selectively abuts against the folding portion 403.

[0055] It can be understood that the valve body 3, the valve plate 4, and the valve seat 2 are sequentially arranged axially inside the valve housing 1, and the valve body 3 can axially move relative to the valve seat 2. Moreover, the fixing portion 402 of the valve plate 4 is fixed to the valve seat 2, so that the valve plate 4 will not axially move. In addition, the valve body 3 selectively abuts against the folding portion 403. In other words, the valve body 3 can abut against or separate from the valve plate 4 by axially moving.

[0056] As Figures 6 - 8 shown, the valve plate 4 is configured such that the damping medium applies pressure to the valve plate 4 to cause the folding portion 403 to elastically deform and lift towards the valve body 3, so that a first overflow channel 5 is formed between the valve plate 4 and the valve seat 2.

[0057] With this arrangement, when the damping medium flows into the valve seat 2 and applies sufficient pressure to the valve plate 4, the folding portion 403 of the valve plate 4 can elastically deform and lift towards the valve body 3, breaking the fitting state between the valve plate 4 and the valve seat 2, so that a first overflow channel 5 is formed between the valve plate 4 and the valve seat 2, enabling the damping medium to flow through the first overflow channel 5 into the valve housing 1 and then flow out of the valve housing 1. In the state where the first overflow channel 5 is opened, the flow rate of the damping medium is large and the damping is small, making the shock absorber as a whole appear "soft".

[0058] Moreover, with the flow rate of the damping medium, the degree to which the folding portion 403 lifts is different, that is, the opening degree of the first overflow channel 5 changes proportionally with the flow rate of the damping medium. In this way, the valve plate 4 can deform under different pressures to form a continuously controllable damping force, thereby enabling damping adjustment in different stages.

[0059] Thus, by fixing the fixing portion 402 of the valve plate 4 on the valve seat 2, when the damping medium applies pressure to the valve plate 4, the folding portion 403 of the valve plate 4 can be elastically deformed and lifted towards the valve body 3, thereby opening the first overflow channel 5. The opening degree of the first overflow channel 5 changes proportionally with the flow rate of the damping medium. In this way, the valve plate 4 can be deformed under different pressures to form a continuous and controllable damping force, thereby achieving damping adjustment in different stages.

[0060] According to some specific embodiments of the present invention, the valve plate 4 is made of an elastic material.

[0061] With this setting, when the damping medium applies different pressures to the valve plate 4, the valve plate 4 can produce different degrees of elastic deformation, thereby achieving damping adjustment in different stages. And when the damping medium no longer applies pressure to the valve plate 4, the valve plate 4 can recover its deformation under its own elastic force and reset to the state of being fitted and fixed with the valve seat 2.

[0062] According to some specific embodiments of the present invention, see Figures 4 - 7 , the fixing portion 402 is fixed at the center of the valve seat 2, the folding portion 403 is connected to the periphery of the fixing portion 402 and extends radially to the outer ends of the valve body 3 and the valve seat 2.

[0063] With this setting, the fixing portion 402 of the valve plate 4 is fitted and fixed with the central portion of the end of the valve seat 2 adjacent to the valve body 3. When the damping medium applies pressure to the valve plate 4, the folding portions 403 on the periphery of the fixing portion 402 can be lifted towards the valve body 3, so that the damping medium is released from the periphery of the first overflow channel 5 formed between the valve seat 2 and the valve plate 4, improving the flow rate of the first overflow channel 5, and further making the flow rate of the damping medium large and the damping small, and further achieving damping adjustment in different stages.

[0064] Exemplarily, the cross-sectional shape of the valve plate 4 is circular, which is adapted to the circular port of the valve seat 2.

[0065] According to some specific embodiments of the present invention, the damping valve further includes: a connection component 6. The connection component 6 includes a bolt 601 and a nut 602. The bolt 601 passes through the fixing portion 402 and the valve seat 2 and is threadedly connected to the nut 602.

[0066] With this setting, the valve plate 4 is fixed on the valve seat 2 by the bolt 601 and the nut 602, ensuring that the valve plate 4 is firmly fixed on the valve seat 2, and further ensuring that the folding portion 403 of the valve plate 4 can be elastically deformed to achieve damping adjustment.

[0067] According to some specific embodiments of the present utility model, the damping valve further includes: an elastic member 7. One end of the valve body 3 facing the valve piece 4 is provided with a concave cavity 301. The elastic member 7 is arranged in the concave cavity 301. One end of the elastic member 7 abuts against the bottom wall of the concave cavity 301, and the other end abuts against the fixing portion 402. The elastic member 7 is configured to apply an elastic force between the valve piece 4 and the valve body 3, so as to form a fifth overflow channel 33 between the valve piece 4 and the valve body 3. With this arrangement, the elastic member 7 is provided on the valve body 3 to elastically abut against the valve piece 4, so that the fifth overflow channel 33 is formed between the valve piece 4 and the valve body 3 under the action of the elastic force. The damping medium can flow from the outside of the valve housing 1 to the valve seat 2 through the fifth overflow channel 33. In the state where the fifth overflow channel 33 is opened, the flow rate of the damping medium is large and the damping is small, making the overall performance of the shock absorber "soft".

[0068] In addition, the damping medium applies a thrust to the valve piece 4, causing the folding portion 403 to undergo elastic deformation. The valve piece 4 synchronously pushes the valve body 3 to axially move in a direction away from the valve seat 2. At this time, the elastic member 7 is squeezed and deformed, and the valve body 3 abuts against the valve piece 4, that is, the fifth overflow channel 33 is closed.

[0069] Further, the damping valve further includes: a guiding member 8. The guiding member 8 is arranged in the concave cavity 301. The elastic member 7 is arranged on the guiding member 8, and the guiding member 8 undergoes axial deformation relative to the guiding member 8.

[0070] With this arrangement, the guiding member 8 can guide the elastic member 7 to undergo axial deformation, playing a guiding role for the elastic member 7.

[0071] As Figure 2 shown, the guiding member 8 can be a guiding column, and the elastic member 7 is sleeved on the guiding column. Alternatively, the guiding member 8 can also be a guiding sleeve, and the elastic member 7 is arranged in the guiding sleeve, so that the elastic member 7 can be axially deformed.

[0072] According to some specific embodiments of the present utility model, see Figure 2 , one end of the valve seat 2 adjacent to the valve body 3 is provided with a first sunk groove 201, and the inner side wall of the first sunk groove 201 is annularly arranged on the outer periphery of the valve body 3 abutting against the folding portion 403.

[0073] With this arrangement, one end of the valve seat 2 adjacent to the valve body 3 is provided with a first sunk groove 201, and the sunk groove area of the first sunk groove 201 is larger than the abutting area between the valve body 3 and the valve piece 4. When the damping medium applies pressure to the valve piece 4, the folding portion 403 is more easily elastically deformed to lift towards the valve body 3. Then, as the flow rate of the damping medium increases, the folding portion 403 can be flushed open by the damping medium and lifted, further pushing the valve body 3 to axially move away from the valve seat 2, facilitating the adjustment of the damping force.

[0074] According to some specific embodiments of the present utility model, see Figure 3, a first through groove 202 is formed on the side wall of the first sink 201, and the first through groove 202 constitutes a second overflow channel 30 connecting the valve seat 2 and the valve housing 1.

[0075] With this arrangement, when the valve body 3 abuts against the valve plate 4, the damping medium outside the valve housing 1 can flow through the first through groove 202 to the valve seat 2. When the damping medium flows to the valve seat 2, the flow rate is large, mainly to apply pressure to the valve plate 4 to open the valve plate 4, and flow from the first overflow channel 5 to the outside of the valve housing 1, and only a small amount of damping medium flows from the first through groove 202 to the outside of the valve housing 1.

[0076] According to some specific embodiments of the present invention, see Figure 3 , Figure 4 and Figure 8 , a plurality of first overflow through holes 401 are provided axially on the folding portion 403, and a plurality of second overflow through holes 203 corresponding to the first overflow through holes 401 are provided axially on the valve seat 2.

[0077] With this arrangement, the plurality of first overflow through holes 401 of the folding portion 403 correspond to the plurality of second overflow through holes 203 of the valve seat 2 one by one. When the fifth overflow channel 33 is in the open state, the damping medium flows from the valve housing 1 to the valve seat 2 through the fifth overflow channel 33. At the same time, it will not cause excessive extrusion deformation to the folding portion 403.

[0078] According to some specific embodiments of the present invention, see Figure 2 , Figures 13 - 15 , a plurality of circumferentially distributed third overflow through holes 101 are formed on the side wall of the valve housing 1, and the third overflow through holes 101 are arranged corresponding to the first overflow channel 5 in the radial direction.

[0079] With this arrangement, a plurality of circumferentially arranged third overflow through holes 101 are formed on the side wall of the valve housing 1, and the third overflow through holes 101 are arranged corresponding to the first overflow channel 5 in the radial direction, which is beneficial for the damping medium to flow through the first overflow channel 5 and quickly flow from the third overflow through holes 101 to the outside of the valve housing 1.

[0080] According to some specific embodiments of the present invention, see Figure 2 , Figure 9 and Figure 14 , the outer side wall of the valve body 3 is in sealing cooperation with the inner side wall of the valve housing 1. An annular rib 102 is provided on the inner bottom wall of the valve housing 1 away from the valve seat 2, and a second sink 302 is provided at one end of the valve body 3 away from the valve seat 2, and the second sink 302 is in sealing cooperation with the annular rib 102.

[0081] With such arrangement, the outer wall of the valve housing 1 is sealed with the inner wall of the valve housing 1 , and the inner bottom wall of the valve housing 1 away from the valve seat 2 is sealed with the end of the valve body 3 away from the valve seat 2 through the annular rib 102 and the second groove 302 , and when the valve body 3 moves axially in the valve housing 1 , the cooperation of the annular rib 102 and the second groove 302 can play a guiding role.

[0082] According to some specific embodiments of the present invention, see Figure 2 、 Figures 10 - 12 The outer wall of the second sink 302 is formed with a slope structure 303, and forms a sealed space 9 with the inner wall of the valve housing 1, and a fourth overflow hole 103 connected to the sealed space 9 is formed on the side wall of the valve housing 1; and a first overflow hole 304 is formed on the side wall of the valve body 3, and the first overflow hole 304 extends radially along the valve body 3 to the center hole 305 of the valve body 3, and the opening of the center hole 305 is toward the end of the valve body 3 away from the valve seat 2, and a second overflow hole 306 is formed on the slope structure 303, and the second overflow hole 306 extends axially along the valve body 3 to communicate with the first overflow hole 304, and the first overflow hole 401 is connected to the first overflow hole 304 to form a third overflow channel 31.

[0083] With this arrangement, the valve body 3 and the valve housing 1 form a sealed space 9, and the valve housing 1 has a fourth overflow hole 103 formed in a location corresponding to the sealed space 9, allowing damping medium outside the valve housing 1 to flow into the sealed space 9. Furthermore, because the inclined surface structure 303 has a second overflow hole 306 formed therein, and the sidewall of the valve body 3 has a first overflow hole 304 formed therein, which communicates with the second overflow hole 306, the damping medium in the sealed space 9 can flow through the first overflow hole 304 and the second overflow hole 306, ultimately flowing into the central hole 305 of the valve body 3, forming a third overflow channel 31.

[0084] Further, see Figure 1 and Figure 2 As shown, the damping valve further includes: a pilot control assembly, the pilot control assembly includes a pilot member 10 , and the pilot member 10 can move axially to block or open the central hole 305 .

[0085] With this arrangement, a pilot member 10 is provided at the opening of the central hole 305. The pilot member 10 can move axially to block or open the central hole 305. Specifically, when the pilot member 10 blocks the central hole 305, the damping medium outside the valve housing 1 can flow into the central hole 305 through the third overflow channel 31, pushing the pilot member 10 open, thereby allowing the damping medium to flow through.

[0086] According to some specific embodiments of the present invention, see Figure 1As shown in the figure, the pilot control component further includes an electromagnetic coil 11 and an electromagnet core 12. The electromagnet core 12 is arranged inside the electromagnetic coil 11. One end of the pilot 10 is arranged inside the electromagnet core 12, and the other end passes through the valve body 3 and is detachably fitted with the central hole 305.

[0087] With such an arrangement, when the electromagnetic coil 11 is powered on, under the action of the current, the electromagnet core 12 can axially move relative to the electromagnetic coil 11 along the direction of the valve body 3 to drive the pilot 10 to axially move, so that one end of the pilot 10 blocks the central hole 305. Among them, the displacement of the pilot 10 changes proportionally with the magnitude of the power supply to the electromagnetic coil 11, so as to control the oil flow rate at the central hole 305, that is, control the opening degree and pressure change of the valve body 3, thereby forming a continuously controllable damping force.

[0088] Furthermore, the pilot control component further includes a coil bracket 19 and a plastic cap 20. The electromagnetic coil 11 is wound around the outside of the coil bracket 19. Both ends of the electromagnetic coil 11 are respectively placed through the two wire grooves of the coil bracket 19, passed through the side groove of the plastic cap 20, and then the central hole 305 of the plastic cap 20 is sleeved on the central column of the coil bracket 19, thereby fixing the electromagnetic coil 11.

[0089] Furthermore, the pilot control component further includes a metal core cover 21 and a metal cap 22. A metal cap 22 is provided on the top end surface of the electromagnetic coil 11. The bottom surface of the metal cap 22 abuts against the top surface of the metal core cover 21. When the electromagnetic coil 11 is powered on, the magnetic lines of force are conducted through the metal cap 22, the metal core cover 21 and the electromagnet core 12 to form a strong magnetic force, thereby driving the pilot 10 to axially move.

[0090] Among them, a circular boss is provided at the top of the metal core cover 21 to position the metal cap 22 and the coil bracket 19. In addition, a three-stage stepped through groove connected in sequence is provided in the inner cavity of the metal core cover 21. A first guide sleeve 23 is provided in the first through groove of the three-stage stepped through groove adjacent to the metal cap 22. A second through groove is provided on the outer side wall of the first guide sleeve 23 as a circulation channel for upper and lower oil or gas. One end of the pilot 10 moves and fits inside the first guide sleeve 23. In addition, the electromagnet core 12 has a clearance fit with the other two through grooves of the three-stage stepped through groove, and the electromagnet core 12 moves axially along the metal core cover 21.

[0091] Furthermore, the pilot control component further includes a first spring 24 and a second spring 25. The electromagnet core 12 is axially provided with a first installation groove for installing the first spring 24 and a second installation groove for installing the second spring 25. The first spring 24 and the second spring 25 can make the electromagnet core 12 statically hover up and down.

[0092] Furthermore, at least two ventilation channels are axially provided on the side wall of the electromagnetic core 12 , and at least two ventilation side holes are radially provided on the side wall of the electromagnetic core 12 , and the ventilation channels and the ventilation side holes are communicated with each other.

[0093] Furthermore, one end of the guide member 10 adjacent to the central hole 305 is a bevel or arc surface structure.

[0094] Furthermore, the pilot control assembly also includes: a magnetic isolation ring 26, and both ends of the magnetic isolation ring 26 are provided with a groove structure, which is used to achieve radial precise positioning and sealing cooperation with the upper and lower connecting components through the groove structure.

[0095] Specifically, a boss is radially disposed on the outer side of the metal core cover 21. The outer side of the boss forms an interference fit with the inner sidewall of the recessed groove structure at one end of the magnetic isolation ring 26, thereby sealing the mating area between the metal core cover 21 and the magnetic isolation ring 26 to prevent fluid leakage. Furthermore, the bottom surface of the boss of the metal core cover 21 axially abuts the bottom surface of the recessed groove at one end of the magnetic isolation ring 26.

[0096] The other end of the magnetic isolation ring 26 has a conical recessed groove, suitable for sealing against one end of the valve body 3. A through-hole is provided in the center of the magnetic isolation ring 26, through which the electromagnet core 12 passes. Furthermore, a sealing ring 27 is provided on the outer wall of the magnetic isolation ring 26 to seal between the outer wall of the magnetic isolation ring 26 and the inner wall of the piston rod 18.

[0097] Furthermore, the valve body 3 includes a first valve body 104 and a second valve body 105 arranged axially. The first valve body 104 is arranged adjacent to the magnetic isolation ring 26 , and the second valve body 105 is arranged adjacent to the valve plate 4 .

[0098] The first valve body 104 is made of a magnetic material. When the electromagnetic coil 11 is energized, it generates a magnetic force that causes the electromagnetic core 12 to move toward the first valve body 104. A conical boss is provided on the top of the first valve body 104. The conical groove of the magnetic isolation ring 26 mates with the boss on the top of the first valve body 104, precisely positioning the magnetic isolation ring 26 radially. A circular groove is provided in the middle of the first valve body 104. The electromagnetic core 12 has a clearance fit within the circular groove, allowing axial movement along the circular groove of the first valve body 104. A through hole is provided in the center of the first valve body 104. A second guide sleeve 28 is disposed within the through hole. The second guide sleeve 28 mates with the pilot element 10 for radial movement. The outer wall of the second guide sleeve 28 has at least one groove, which serves as a flow channel for oil or gas. The sidewalls of the first valve body 104 and the second valve body 105 are connected and fixed via a boss and groove structure. Multiple third overflow holes 101 are provided in the sidewalls of the second valve body 105.

[0099] According to some specific embodiments of the present utility model, a fifth overflow through-hole 307 penetrating axially is provided inside the valve body 3, and the fifth overflow through-hole 307 constitutes a fourth overflow passage 32 connecting both ends of the valve body 3. With this arrangement, the damping medium can flow from the lower part to the upper part or from the upper part to the lower part of the valve body 3 through the fifth overflow through-hole 307.

[0100] The shock absorber according to the embodiment of the second aspect of the present utility model includes a damping valve.

[0101] According to some specific embodiments of the present utility model, see Figure 1 , the shock absorber further includes: a cylinder body 13 and a piston.

[0102] The cylinder body 13 includes a first cylinder body 1301 and a second cylinder body 1302 sleeved from outside to inside in sequence. A liquid storage cavity 14 is defined between the first cylinder body 1301 and the second cylinder body 1302, and an overflow hole is formed on the second cylinder body 1302.

[0103] The piston is movably arranged inside the second cylinder body 1302. The piston divides the interior of the second cylinder body 1302 into a recovery cavity 15 and a compression cavity 16. A piston valve 17 is provided on the piston to control the connection and disconnection between the recovery cavity 15 and the compression cavity 16. The recovery cavity 15 is connected to the liquid storage cavity 14 through the overflow hole. The damping valve is arranged inside the piston and is serially arranged at one end of the piston valve 17 located in the recovery cavity 15.

[0104] Specifically, a damping medium with a certain pressure is stored in the liquid storage cavity 14, which may include hydraulic oil and inert gas. The piston divides the interior of the second cylinder body 1302 into a recovery cavity 15 and a compression cavity 16. The damping valve is arranged at one end of the piston valve 17 located in the recovery cavity 15. In addition, the shock absorber further includes a bottom valve 29, and the compression cavity 16 is between the bottom valve 29 and the piston valve 17.

[0105] According to some specific embodiments of the present utility model, the piston further includes: a piston rod 18. The outer side wall of one end of the valve body 3 is threadedly connected to the inner side wall of the piston rod 18, and the outer side wall of the other end is threadedly connected to the inner side wall of the piston valve 17. The piston rod 18 can axially move inside the second cylinder body 1302.

[0106] With this arrangement, the external thread of the first valve body 104 is in spiral fit with the internal thread of the piston rod 18, and the external thread of the second valve body 105 is in thread fit with the internal thread of the piston valve 17 of the valve body 3, thereby abutting and fixing the damping valve between the piston rod 18 and the piston valve 17.

[0107] The vehicle according to the embodiment of the third aspect of the present utility model includes a shock absorber.

[0108] When the shock absorber according to the present invention is applied to a vehicle, it can be installed above the wheel axle for shock absorption. When the vehicle body and the wheel move relative to each other, the piston rod 18 in the shock absorber drives the piston valve 17 and the damping valve to move up and down relatively. The oil in the shock absorber cavity repeatedly flows from the recovery cavity 15 and the liquid storage cavity 14 through different pores into and out of the compression cavity 16, thereby converting the vibration energy into heat energy of the oil and gas and dissipating it into the atmosphere.

[0109] 1. When the vehicle is traveling on a relatively flat road, the electromagnetic coil 11 is not energized, and the fifth overflow channel 33 between the valve body 3 and the valve plate 4 is in a normally open state, that is, the damping valve is a normally open valve.

[0110] It should be noted that the attached Figures 16 - 20 P1 is the pressure of the recovery chamber 15, P2 is the pressure of the sealing space 9, P3 is the pressure of the concave cavity 301 of the valve body 3, P4 is the pressure of the inner cavity of the valve seat 2, P5 is the pressure of the compression chamber 16, and P6 is the pressure of the chamber between the bottom valve 29 and the bottom of the second cylinder 1302.

[0111] See Figure 16 When the piston rod 18 is pushed upward, the pressure in the restoring chamber 15 increases, and the oil flows from the restoring chamber 15 through the fifth overflow channel 33 between the valve plate 4 and the valve body 3 into the compression chamber 16. At the same time, the oil in the oil storage chamber also flows into the compression chamber 16 through the bottom valve 29. In this state, the oil flow is large, the fluid damping is small, and the shock absorber behaves as "soft".

[0112] See Figure 17 When piston rod 18 pushes downward, the pressure in recovery chamber 15 decreases, while the pressure in compression chamber 16 increases. Oil from compression chamber 16 pushes valve plate 4, elastically deforming folded portion 403 and lifting it toward valve body 3. Simultaneously, folded portion 403 pushes valve body 3 axially, closing fifth overflow channel 33. At this point, oil flows from the high-flow channel between compression valve plate 4 and valve seat 2 into recovery chamber 15. Simultaneously, oil in compression chamber 16 flows through bottom valve 29 into the oil reservoir. The gas in reservoir chamber 14 is compressed, buffering energy and reducing vibration. In this state, the oil flow is high, the fluid damping is low, and the shock absorber behaves as "soft."

[0113] 2. When the vehicle is traveling on a bumpy and uneven road, the electromagnetic coil 11 is energized, and the electromagnetic core 12 is pushed downward by the magnetic force. The pilot element 10 blocks the central hole 305 and continues to push the valve body 3 until the valve body 3 abuts the valve disc 4, and the valve disc 4 abuts the valve seat 2, that is, the large flow channel between the valve disc 4 and the valve body 3 and the valve seat 2 is closed (or partially closed).

[0114] See Figure 18 and Figure 19 When the piston rod 18 vibrates upward, the pressure in the recovery chamber 15 increases, and the oil flows from the recovery chamber 15 and the oil storage cylinder into the compression chamber 16.

[0115] In the Q1 stage, the valve body 3 abuts against the valve disc 4, and the valve disc 4 abuts against the valve seat 2 to seal the large-flow channel. The hydraulic oil first flows out from the first through groove 202 (i.e., the second overflow channel 30) of the valve seat 2, with a small flow rate and a large damping, showing as "hard".

[0116] In the Q2 stage, the hydraulic oil flows into the first overflow hole 304 and the second overflow hole 306 of the valve body 3 through the fourth overflow through hole 103 of the valve body 3. When the oil pressure increases at P2, it overcomes the electromagnetic force to push open the pilot part 10 and flows out to the P4 pressure chamber, with the damping decreasing.

[0117] In the Q3 stage, a large amount of hydraulic oil accumulates at the lower end of the valve disc 4, and the oil pressure at P4 increases. When the pressure is greater than the electromagnetic force, the hydraulic oil pushes open the valve disc 4 and the valve body 3, and the hydraulic oil flows out between the valve seat 2 and the valve disc 4, with the damping further decreasing.

[0118] See Figure 20 , when the piston rod 18 vibrates downward, the pressure in the compression chamber 16 increases, and the hydraulic oil flows from the compression chamber 16 into the restoration chamber 15 and the oil storage chamber.

[0119] In the Q1 stage, the valve body 3 abuts against the valve disc 4, and the valve disc 4 abuts against the valve seat 2 to seal the large-flow channel. The hydraulic oil first flows out from the first through groove 202 of the valve seat 2, with a small flow rate and a large damping, showing as "hard".

[0120] In the Q2 stage, a large amount of hydraulic oil accumulates in the P4 cavity in the valve seat 2, and the oil pressure at P4 increases. When the pressure is greater than the electromagnetic force, the hydraulic oil causes the valve disc 4 to deform and pushes open the valve body 3, and the hydraulic oil flows out between the valve seat 2 and the valve disc 4, with the damping decreasing.

[0121] Therefore, when the piston rod 18 reciprocates upward or downward, the hydraulic oil reciprocates in the liquid storage chamber 14, the compression chamber 16, and the restoration chamber 15, and the flow rate changes, and the fluid damping changes, resulting in better riding comfort.

[0122] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0123] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with that embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0124] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A damping valve, characterized in that: include: valve housing; a valve seat, the valve seat being disposed in the valve housing; a valve body, the valve body being disposed in the valve housing and being axially movable relative to the valve seat; The valve disc includes a fixed portion and a folding portion, the folding portion is connected to the fixed portion, the fixed portion is fixed to the valve seat, the valve body selectively abuts the folding portion, and the valve disc is constructed so that the damping medium applies pressure to the valve disc to cause the folding portion to elastically deform and lift toward the valve body, thereby forming a first overflow channel between the valve disc and the valve seat.

2. The damping valve according to claim 1, characterized in that: The valve plate is made of elastic material.

3. The damping valve according to claim 1, characterized in that The fixing portion is fixed at the center of the valve seat, and the folding portion is connected to the circumference of the fixing portion and radially extends to the outer ends of the valve body and the valve seat.

4. The damping valve according to claim 1, characterized in that Also includes: A connecting assembly includes a bolt and a nut. The bolt passes through the fixing portion and the valve seat and is threadedly connected to the nut.

5. The damping valve according to claim 1, characterized in that Also includes: An elastic member, wherein a concave cavity is provided at one end of the valve body facing the valve disc, and the elastic member is arranged in the concave cavity. One end of the elastic member abuts against the bottom wall of the concave cavity and the other end abuts against the fixed portion. The elastic member is constructed to apply an elastic force between the valve body and the valve disc to form a fifth overflow channel between the valve disc and the valve body.

6. The damping valve according to claim 5, characterized in that Also includes: The guide member is axially arranged in the concave cavity, and the elastic member is arranged on the guide member and generates axial deformation relative to the guide member.

7. The damping valve according to claim 1, characterized in that A first recessed groove is provided at one end of the valve seat adjacent to the valve body, and an inner side wall of the first recessed groove is arranged around the outer periphery of the valve body abutting against the folded portion.

8. The damping valve according to claim 7, characterized in that: A first through groove is formed on the side wall of the first sink, and the first through groove constitutes a second overflow channel communicating between the valve seat and the valve housing.

9. The damping valve according to claim 1, characterized in that: A plurality of first overflow holes are provided in the axial direction of the folded portion, and a plurality of second overflow holes corresponding to the first overflow holes are provided in the axial direction of the valve seat.

10. The damping valve according to claim 1, characterized in that A plurality of circumferentially distributed third overflow holes are formed on the side wall of the valve housing, and the third overflow holes are arranged corresponding to the first overflow channel in the radial direction.

11. The damping valve according to claim 1, characterized in that The outer wall of the valve body is sealed with the inner wall of the valve housing, the inner bottom wall of the valve housing away from the valve seat is provided with an annular rib, and the end of the valve body away from the valve seat is provided with a second groove, and the second groove is sealed with the annular rib.

12. The damping valve according to claim 11, characterized in that The outer wall of the second sink is formed with an inclined surface structure and forms a sealed space with the inner wall of the valve housing, and a fourth overflow hole is formed on the side wall of the valve housing for connecting the sealed space with the outside of the valve housing; and A first overflow hole is provided on the side wall of the valve body, and the first overflow hole extends radially along the valve body to the center hole of the valve body, and the opening of the center hole is toward the end of the valve body away from the valve seat. A second overflow hole is provided on the inclined structure, and the second overflow hole extends axially along the valve body to communicate with the first overflow hole, and the first overflow flow hole is connected to the first overflow hole to form a third overflow channel.

13. The damping valve according to claim 12, characterized in that Also includes: The pilot control assembly includes a pilot piece, and the pilot piece can move axially to block or open the central hole.

14. The damping valve according to claim 13, characterized in that The pilot control assembly further comprises: electromagnetic coil; An electromagnetic core is arranged in the electromagnetic coil, one end of the pilot element is arranged in the electromagnetic core and the other end passes through the valve housing and the valve body and is detachably matched with the center hole.

15. The damping valve according to claim 1, characterized in that A fifth overflow hole extending axially through the valve body is provided inside the valve body, and the fifth overflow hole constitutes a fourth overflow channel extending through the valve body.

16. A shock absorber, characterized in that: The damping valve comprises the damping valve according to any one of claims 1 to 15.

17. The shock absorber according to claim 16, characterized in that Further including: The cylinder comprises a first cylinder and a second cylinder which are sequentially sleeved from the outside to the inside, a liquid storage cavity is defined between the first cylinder and the second cylinder, and a flow hole is formed on the second cylinder; A piston is movably disposed in the second cylinder, and the piston divides the interior of the second cylinder into a recovery chamber and a compression chamber. A piston valve is provided on the piston to control the connection and isolation of the recovery chamber and the compression chamber. The recovery chamber is connected to the liquid storage chamber through the flow hole. The damping valve is disposed inside the piston and is arranged in series on the end of the piston valve away from the compression chamber.

18. The shock absorber according to claim 17, characterized in that The piston further comprises: A piston rod, the outer wall of one end of the valve body is threadedly connected to the inner wall of the piston rod and the outer wall of the other end is threadedly connected to the inner wall of the piston valve, and the piston rod is axially movable in the second cylinder.

19. A vehicle, characterized in that: The vibration absorber comprises the vibration absorber according to any one of claims 16 to 18.

Images