CN219840970U - Damping valve, shock absorber and vehicle - Google Patents

Abstract

The utility model discloses a damping valve, a shock absorber and a vehicle, wherein the damping valve comprises a valve housing assembly; a valve housing assembly; the valve body is arranged in the valve shell assembly, and the valve body and the valve shell assembly are separated into a valve body compression cavity and a valve body back pressure cavity; and the valve plate assembly is arranged in the valve body back pressure cavity and selectively conducts the valve body compression cavity and the valve body back pressure cavity. Therefore, the valve plate assembly capable of selectively conducting the valve body compression cavity and the valve body back pressure cavity is arranged in the back pressure cavity, so that the damping valve can guide the pressure in the valve body compression cavity into the valve body back pressure cavity during compression, the whole pressure of the damping valve is balanced, the specific gravity of electromagnetic force in a damping valve action force system is improved, and a compression damping characteristic curve section is enlarged.

Description

Damping valve, shock absorber and vehicle

Technical Field

The utility model relates to the technical field of automobiles, in particular to a damping valve, a shock absorber and a vehicle.

Background

In the related art, in order to improve the performance of the shock absorber, a damping valve is arranged in the shock absorber, the damping valve is an inverse proportion damping valve, on one hand, the inverse proportion adjustment of the damping valve does not meet the requirements of clients, the electromagnetic force of a magnetic loop of the damping valve after the magnetic loop is electrified is opposite to the pretightening direction of the valve, and the smaller the current passing through the magnetic loop is, the larger the damping value is. In some implementations, the greater the control current required to the shock absorber assembly, the greater the damping. When not electrified, the comfort of the whole vehicle can reach a small damping force at the client. On the other hand, the compression adjustable interval range of the damping characteristic curve is narrow, the compression characteristic interval is smaller, namely the hydraulic pressure is larger under the action of the pressure bearing surface and the pressure, so that the electromagnetic force occupies smaller space in the whole force balance, the adjusting action is not obvious, and the force value interval required by a customer is not met.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. To this end, an object of the present utility model is to provide a damping valve that can increase the specific gravity of electromagnetic force in the damping valve action force system, thereby expanding the compression damping characteristic curve section.

The utility model further provides a shock absorber.

The utility model further provides a vehicle.

The damping valve according to the first aspect of the present utility model includes: a valve housing assembly; the valve body is arranged in the valve shell assembly, and the valve body and the valve shell assembly are separated into a valve body compression cavity and a valve body back pressure cavity; and the valve plate assembly is arranged in the valve body back pressure cavity and selectively conducts the valve body compression cavity and the valve body back pressure cavity.

Therefore, the valve plate assembly capable of selectively conducting the valve body compression cavity and the valve body back pressure cavity is arranged in the back pressure cavity, so that the damping valve can guide the pressure in the valve body compression cavity into the valve body back pressure cavity during compression, the whole pressure of the damping valve is balanced, the specific gravity of electromagnetic force in a damping valve action force system is improved, and a compression damping characteristic curve section is enlarged.

In some examples of the utility model, the valve body is provided with a first orifice communicating the valve body compression chamber and the valve body back pressure chamber; the valve plate assembly includes: valve block and elastic component, the valve block set up in on the valve body and sealed first orifice, the elastic component butt is in between the valve block and the valve housing subassembly.

In some examples of the present utility model, the valve body is provided with a limiting step, the liquid outlet end of the first orifice is disposed on the limiting step, and the valve plate is sleeved on the valve body and is disposed on the limiting step.

In some examples of the utility model, the valve body includes: the valve plate is sleeved on the first valve body and is in clearance fit with the first valve body.

In some examples of the utility model, the first orifice is bored obliquely inward to the valve body compression chamber at the restricting step.

In some examples of the utility model, the resilient member is a coil spring having a large diameter end and a small diameter end, the small diameter end abutting against the valve plate and the large diameter end abutting against the valve housing assembly.

In some examples of the utility model, the valve body and the valve housing assembly further define a valve body return chamber, the valve body compression chamber selectively communicating with the valve body return chamber, the valve body return chamber and the valve body back pressure chamber being axially spaced apart on an outer periphery of the valve body, a second orifice being disposed between the valve body and the valve housing assembly communicating the valve body return chamber and the valve body back pressure chamber.

In some examples of the present utility model, the second orifice is a plurality of second orifices, and the plurality of second orifices are disposed at intervals on the outer periphery of the valve body.

In some examples of the utility model, a drain hole is provided on an outer periphery of the valve plate, the drain hole corresponding to the second orifice.

In some examples of the utility model, the damping valve further comprises: the magnetic circuit assembly is arranged on the valve shell assembly, a valve body circulation cavity is separated among the magnetic circuit assembly, the valve body and the valve shell assembly, and the valve body circulation cavity is communicated with the valve body compression cavity; and the tappet assembly is movably arranged on the magnetic circuit assembly and selectively conducts the valve body circulation cavity and the valve body back pressure cavity under the magnetic action of the magnetic circuit assembly.

In some examples of the utility model, the tappet assembly includes: a tappet rod movably disposed to the magnetic circuit assembly; and the tappet ball body is arranged at one end of the tappet stay rod, which faces the valve body, and is matched with the valve body.

In some examples of the present utility model, a first channel is formed on the valve body, the first channel is connected between the valve body circulation cavity and the valve body back pressure cavity, a mating conical surface is disposed on a side of the first channel facing the tappet ball, a first spherical surface is disposed on an end of the tappet ball facing the first channel, and the mating conical surface is mated with the first spherical surface and has a gap.

In some examples of the present disclosure, a mounting groove is disposed at an end of the tappet rod facing the valve body, a second spherical surface is disposed in the mounting groove, a third spherical surface is disposed at an end of the tappet sphere facing away from the first channel, and the second spherical surface is matched with the third spherical surface.

In some examples of the present utility model, a first passage is formed in the valve body, the first passage being connected between the valve body flow chamber and the valve body back pressure chamber, the tappet ball being provided with a second passage, the tappet rod being provided with a third passage, the magnetic circuit assembly being provided with a magnetic core chamber, the second passage being connected between the first passage and the third passage, the third passage being in communication with the magnetic core chamber.

In some examples of the utility model, the magnetic circuit assembly includes: the connecting sleeve is connected to the valve housing assembly; the electromagnetic coil assembly is arranged in the connecting sleeve; the first yoke sleeve is arranged in the electromagnetic coil assembly; the magnetic core is arranged in the first yoke bush, and the tappet assembly is arranged on the magnetic core; the second yoke bush is arranged on one side of the magnetic core, which faces the valve body, and the second yoke bush is provided with a pole shoe corresponding to the magnetic core.

In some examples of the utility model, the magnetic circuit assembly includes: the magnetism isolating piece is positioned between the first yoke bush and the second yoke bush, and the first yoke bush and the second yoke are fixed on the magnetism isolating piece.

In some examples of the utility model, the second yoke bush is disposed on a side of the magnetic core facing the magnetic insulation pad opposite to the magnetic core.

In some examples of the utility model, the valve housing assembly includes: a valve housing; the end cover is arranged in the valve shell, a valve body transition cavity is formed in one side, facing the valve body, of the end cover, the valve body, the valve shell and the end cover are further separated into a valve body restoration cavity, and the valve body transition cavity is located between the valve body compression cavity and the valve body restoration cavity.

The shock absorber according to the second aspect of the present utility model includes: the damping valve described above.

A vehicle according to a third aspect of the utility model includes: the damper described above.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a cross-sectional block diagram according to an embodiment of the present utility model;

FIG. 2 is a block diagram of an end cap according to an embodiment of the present utility model;

FIG. 3 is a block diagram of a valve body according to an embodiment of the present utility model;

fig. 4 is an enlarged view of area a in fig. 3;

FIG. 5 is a front view of a valve plate according to an embodiment of the present utility model;

FIG. 6 is a schematic structural view of an elastic member according to an embodiment of the present utility model;

FIG. 7 is a schematic view of the structure of a valve body according to an embodiment of the present utility model;

FIG. 8 is a schematic diagram of the structure at a magnetic circuit assembly according to an embodiment of the utility model;

fig. 9 is a mating block diagram of a valve body, tappet assembly, and magnetic core in accordance with an embodiment of the present utility model.

Reference numerals:

100. a damping valve;

10. a valve housing assembly; 11. a valve body compression chamber; 12. a valve body recovery chamber;

13. a valve body back pressure chamber; 14. a valve body flow chamber; 15. a valve housing; 16. an end cap;

17. a valve body transition chamber; 20. a valve body; 21. a first orifice; 22. a limit step;

23. a first valve body; 24. a second valve body; 25. a second orifice; 26. a first channel;

261. matching with a conical surface; 30. a valve plate assembly; 31. a valve plate; 311. a drain hole; 32. an elastic member;

40. a magnetic circuit assembly; 41. a magnetic core cavity; 42. connecting sleeves; 43. an electromagnetic coil assembly; 44. a first yoke bush;

45. a magnetic core; 46. a second yoke bush; 47. a magnetism isolating member; 48. a magnetic isolation pad; 49. a yoke; 50. a tappet assembly;

51. a tappet stay; 511. a mounting groove; 5111. a second spherical surface; 512. a third channel;

52. a tappet sphere; 521. a first spherical surface; 522. a third spherical surface; 523. a second channel;

60. an adjusting spring; 70. an end cap backing ring.

Detailed Description

Embodiments of the present utility model will be described in detail below, with reference to the accompanying drawings, which are exemplary.

A damping valve 100 according to an embodiment of the present utility model, which is located in a shock absorber, can expand a damping characteristic curve section at the time of compression will be described with reference to fig. 1 to 9.

As shown in fig. 1 to 9, the damper valve 100 according to the embodiment of the first aspect of the present utility model includes a valve housing assembly 10, a valve body 20, and a valve plate assembly 30, the valve body 20 being disposed in the valve housing assembly 10, the valve body 20 and the valve housing assembly 10 partitioning a valve body compression chamber 11, a valve body recovery chamber 12, and a valve body back pressure chamber 13, the valve body compression chamber 11 being selectively communicated with the valve body recovery chamber 12, the valve body recovery chamber 12 being communicated with the valve body back pressure chamber 13. The valve plate assembly 30 is disposed in the valve body back pressure chamber 13, and the valve plate assembly 30 selectively communicates the valve body compression chamber 11 and the valve body back pressure chamber 13.

Specifically, the valve housing assembly 10 is wrapped on the outer side of the valve body 20, so that the valve body 20 can be protected and fixed, the valve body 20 can axially move in the valve housing assembly 10, when the damping valve 100 is compressed, the valve plate assembly 30 conducts the valve body compression cavity 11 and the valve body back pressure cavity 13, oil can flow into the valve body back pressure cavity 13 through the valve body compression cavity 11, so that partial hydraulic force born by the front surface of the valve body 20 can be counteracted, the specific gravity of electromagnetic force in the action force system of the damping valve 100 is improved, the interval distance of damping characteristic curves of the damping valve 100 under different currents is increased, and the damping characteristic curve interval of the damping valve 100 during compression is enlarged; when the damping valve 100 is restored, the valve plate assembly 30 closes the communication channel between the valve body compression cavity 11 and the valve body back pressure cavity 13, and at this time, the oil in the valve body back pressure cavity 13 flows into the valve body restoration cavity 12, so that the damping valve 100 can be normally restored, thereby improving the controllability of the damping valve 100 and further improving the scientificity and practicality of the damping valve 100.

Therefore, by arranging the valve plate assembly 30 in the back pressure cavity, which can selectively conduct the valve body compression cavity 11 and the valve body back pressure cavity 13, the damping valve 100 can lead the pressure in the valve body compression cavity 11 into the valve body back pressure cavity 13 during compression, so that the whole pressure of the damping valve 100 is balanced, the specific gravity of electromagnetic force in the action force system of the damping valve 100 is improved, and the compression damping characteristic curve section is enlarged.

According to some alternative embodiments of the present utility model, as shown in fig. 1 to 7, a first orifice 21 communicating the valve body compression chamber 11 and the valve body back pressure chamber 13 is provided on the valve body 20; the valve plate assembly 30 includes a valve plate 31 and an elastic member 32, the valve plate 31 is disposed on the valve body 20, and the valve plate 31 seals the first orifice 21, and the elastic member 32 abuts between the valve plate 31 and the valve housing assembly 10. Specifically, the first orifice 21 on the valve body 20 is communicated with the valve body compression chamber 11 and the valve body back pressure chamber 13, the elastic piece 32 is abutted between the valve piece 31 and the valve shell 15 to provide elastic force for the valve piece 31 to move upwards along the axial direction of the valve body 20, the valve piece 31 can seal the first orifice 21 communicated with the valve body compression chamber 11 and the valve body back pressure chamber 13, and thus the valve piece 31 can realize the effect of selectively conducting the valve body compression chamber 11 and the valve body back pressure chamber 13 in a unidirectional way under the combined action of the elastic piece 32 and the valve piece 31, so that the damping characteristic curve space when the damping valve 100 is compressed is enlarged.

Specifically, as shown in fig. 1 to 4, the valve body 20 is provided with a limiting step 22, the liquid outlet end of the first orifice 21 is disposed at the limiting step 22, the valve plate 31 is sleeved on the valve body 20, and the valve plate 31 is disposed on the limiting step 22. Wherein, valve body backpressure chamber 13 department is provided with spacing step 22, and the play liquid end of first orifice 21 sets up on spacing step 22, and spacing step 22 can restrict the radial removal of valve block 31 along valve body 20, and valve block 31 can seal the play liquid end of first orifice 21 on spacing step 22 along the axial removal of valve body 20 to improve valve block 31 and first orifice 21 rationality in space layout.

Further, as shown in fig. 1 and 2, the valve body 20 includes a first valve body portion 23 and a second valve body portion 24, the outer diameter of the first valve body portion 23 is smaller than the outer diameter of the second valve body portion 24, a limiting step 22 is formed between the first valve body portion 23 and the second valve body portion 24, the second valve body portion 24 and the valve housing assembly 10 separate a valve body compression chamber 11, a valve plate 31 is sleeved on the first valve body portion 23, and the valve plate 31 is in clearance fit with the first valve body portion 23. The first valve body portion 23 is connected with the second valve body portion 24, the outer diameter of the second valve body portion 24 is larger than that of the first valve body portion 23, a valve body compression cavity 11 is formed between the second valve body portion 24 and the valve housing assembly 10, a limiting step 22 is formed at a connecting transition position between the second valve body portion 24 and the first valve body portion 23, the valve plate 31 is sleeved on the periphery of the first valve body portion 23, the valve plate 31 is coaxial with the first valve body portion 23, the valve plate 31 is in clearance fit with the periphery of the first valve body portion 23, and therefore guiding constraint on axial movement of the valve body 20 can be conveniently and smoothly carried out on the valve plate 31, and the effect of selectively sealing the first throttling hole 21 is achieved. In addition, a small clearance is provided between the back pressure chamber 13 of the valve body and the inner periphery of the valve plate 31, so that a matching surface for relative movement can be obtained, and the assembly can be facilitated.

Specifically, as shown in connection with fig. 1 to 4, the first orifice 21 is obliquely penetrated inward to the valve body compression chamber 11 at the restriction step 22. Wherein, first orifice 21 is inwards worn to valve body compression chamber 11 by valve body backpressure chamber 13 slope in spacing step 22 department, so can reduce the stroke that fluid flows, can also reduce the influence to the internal structure intensity of valve body 20, can also make fluid flow more smoothly to improve the practicality and the reliability of first orifice 21.

Further, as shown in connection with fig. 1-6, the elastic member 32 is a coil spring having a large diameter end and a small diameter end, the small diameter end being abutted against the valve plate 31, and the large diameter end being abutted against the valve housing assembly 10. The elastic member 32 abutting on the valve plate 31 is a tower spring, the large diameter end of the tower spring abuts on the valve housing assembly 10 along the axial direction of the valve body 20, and the small diameter end of the tower spring abuts on the valve plate 31 along the axial direction of the valve body 20, so that the assembly space along the axial direction in the valve body back pressure cavity 13 can be saved, meanwhile, the rigidity of the valve body back pressure cavity is small, the elastic member 32 can generate elastic force to be transmitted to the valve plate 31 after being elastically deformed, the valve plate 31 sleeved on the periphery of the first valve body portion 23 is axially moved to selectively seal the first throttling hole 21, and scientificity and rationality of the space effect of a damping characteristic curve of the damping valve 100 when the damping valve is compressed are improved.

Specifically, as shown in fig. 1 to 5, 7 and 9, the valve body return chamber 12 and the valve body back pressure chamber 13 are axially spaced on the outer periphery of the valve body 20, and a second orifice 25 communicating the valve body return chamber 12 and the valve body back pressure chamber 13 is provided between the valve body 20 and the valve housing assembly 10. Wherein, the second orifice 25 communicating the valve body back pressure chamber 13 and the valve body return chamber 12 in the axial direction of the valve body 20 allows the damping valve 100 to flow oil from the valve body back pressure chamber 13 to the valve body return chamber 12 at the time of return, so that the damping valve 100 can be normally returned.

Further, as shown in fig. 1 to 5, the second orifice 25 is plural, and plural second orifices 25 are provided at intervals on the outer periphery of the valve body 20. The plurality of second orifices 25 are disposed at intervals on the outer periphery of the second valve body 24, so that the effective conduction area of the second orifices 25 can be increased, thereby improving the efficiency of the damping valve 100 in flowing oil from the valve body back pressure chamber 13 to the valve body recovery chamber 12 during recovery, and further improving the practicality of the damping valve 100.

Specifically, the valve plate 31 is provided on the outer periphery thereof with a drain hole 311, the drain hole 311 corresponding to the second orifice 25. Wherein, the periphery of the valve plate 31 abutting against the first orifice 21 is provided with a drain hole 311 corresponding to the second orifice 25, when the damper valve 100 is restored, the valve plate 31 can smoothly flow the oil in the valve body back pressure cavity 13 into the second orifice 25 on the premise of sealing the first orifice 21, thereby realizing the effect of faster restoration of the damper valve 100.

According to some alternative embodiments of the present utility model, as shown in fig. 1, 2 and 8, the damping valve 100 further includes a magnetic circuit assembly 40 and a tappet assembly 50, the magnetic circuit assembly 40 is disposed on the valve housing assembly 10, a valve body circulation cavity 14 is partitioned between the magnetic circuit assembly 40, the valve body 20 and the valve housing assembly 10, and the valve body circulation cavity 14 is communicated with the valve body compression cavity 11; the tappet assembly 50 is movably disposed in the magnetic circuit assembly 40, and the tappet assembly 50 selectively communicates the valve body flow chamber 14 and the valve body back pressure chamber 13 under the magnetic action of the magnetic circuit assembly 40.

Specifically, the magnetic circuit assembly 40 of the damping valve 100, the valve body 20 and the valve housing assembly 10 together form a valve body circulation cavity 14, the valve body circulation cavity 14 is communicated with the valve body compression cavity 11, oil can flow into the valve body circulation cavity 14 through the valve body compression cavity 11, the tappet assembly 50 can move in the magnetic circuit assembly 40 along the axial direction of the valve body 20, and the tappet assembly 50 selectively conducts the valve body circulation cavity 14 and the valve body back pressure cavity 13 under the magnetic action corresponding to the on-off of the magnetic circuit assembly 40 respectively, so that the pressure at the valve body back pressure cavity 13 can be led into the valve body circulation cavity 14, the pressure action at the valve body compression cavity 11 is reduced, the specific gravity of electromagnetic force in a hydraulic force and spring force system is improved, and the compression damping characteristic curve section of the damping valve 100 is further expanded.

Specifically, as shown in connection with FIG. 1, tappet assembly 50 includes a tappet rod 51 and a tappet ball 52, tappet rod 51 being movably disposed in magnetic circuit assembly 40; the tappet ball 52 is disposed at an end of the tappet stay 51 facing the valve body 20, and the tappet ball 52 is engaged with the valve body 20. One end of the tappet rod 51 is axially disposed in the magnetic circuit assembly 40 along the valve body 20, the other end of the tappet rod 51 faces the valve body 20, the tappet ball 52 is disposed on the other end of the tappet rod 51, and the tappet ball 52 is matched with the valve body 20, so that the tappet rod 51 can axially move in the magnetic circuit assembly 40 under the magnetic action of the magnetic circuit assembly 40, and the tappet ball 52 connected with the tappet rod 51 converts the magnetic force generated by the magnetic circuit assembly 40 into pressure action transmitted to the valve body 20. The reliability of the engagement of the tappet ball 52 with the valve body 20 can be ensured by the tappet ball 52.

Further, as shown in fig. 1, 2 and 9, a first channel 26 is formed on the valve body 20, the first channel 26 is connected between the valve body circulation chamber 14 and the valve body back pressure chamber 13, a mating conical surface 261 is provided on a side of the first channel 26 facing the tappet ball 52, a first spherical surface 521 is provided on an end of the tappet ball 52 facing the first channel 26, the mating conical surface 261 mates with the first spherical surface 521, and the mating conical surface 261 has a clearance with the first spherical surface 521. The first channel 26 on the valve body 20 is connected between the valve body circulation cavity 14 and the valve body back pressure cavity 13, a matching conical surface 261 is arranged on one side of the first channel 26 facing the tappet ball 52 and is in clearance fit with a first spherical surface 521 arranged on one end of the tappet ball 52 facing the first channel 26, so that the problems of leakage and instability of side gap pressure caused by different axes of machining and assembling of the valve body 20 and the tappet assembly 50 in axial movement can be reduced, the valve body 20 and the tappet ball 52 adopt a matching form of the conical surface and the spherical surface, and clearance fault tolerance within a certain range can be realized, so that the clearance problem caused by different axes of the valve body 20 and the tappet ball 52 is avoided.

Specifically, as shown in fig. 1 and 9, the end of the tappet rod 51 facing the valve body 20 is provided with a mounting groove 511, a second spherical surface 5111 is provided in the mounting groove 511, the end of the tappet sphere 52 facing away from the first passage 26 is provided with a third spherical surface 522, and the second spherical surface 5111 is matched with the third spherical surface 522. The second spherical surface 5111 of the tappet stay 51 is disposed in the mounting groove 511 at one end facing the valve body 20 and may be matched with the third spherical surface 522 disposed at one end of the tappet stay 52 away from the first channel 26, so that the tappet stay 51 provides a mounting position for the tappet stay 52, coaxiality of the tappet stay 51 and the tappet stay 52 is improved, and a gap fault tolerance within a certain range can be realized by adopting a spherical surface and spherical surface matching form for the tappet stay 51 and the tappet stay 52, so that a gap problem caused by that the tappet stay 51 and the tappet stay 52 are not coaxial is avoided.

Further, as shown in fig. 1 and 9, the valve body 20 is formed with a first passage 26, the first passage 26 is connected between the valve body circulation chamber 14 and the valve body back pressure chamber 13, the tappet ball 52 is provided with a second passage 523, the tappet rod 51 is provided with a third passage 512, the magnetic circuit assembly 40 is provided with a magnetic core chamber 41, the second passage 523 is connected between the first passage 26 and the third passage 512, and the third passage 512 is in communication with the magnetic core chamber 41. The oil can flow from the valve body back pressure cavity 13 to the magnetic core cavity 41 in the magnetic circuit assembly 40 through the first channel 26, the second channel 523 and the third channel 512 which are mutually communicated, so that the pressure of the valve body back pressure cavity 13 is led into the magnetic core cavity 41, the action of the hydraulic pressure of the valve body 20 on the magnetic circuit assembly 40 is reduced, the specific gravity of the electromagnetic force in the hydraulic pressure combined spring force and other force systems is improved, and the effect of expanding the compression damping characteristic curve interval is further realized. In addition, compared with the traditional damping valve, the hydraulic damping valve has the advantages that the connecting sleeve end realizing structure for pressure compensation of the magnetic core cavity 41 is not required, the process links such as design and processing of orifices can be reduced, the product manufacturing efficiency is improved, the tappet ball 52 and the tappet support adopt the matching mode of the middle hole and the spherical pair, the pressure at the back pressure cavity 13 of the valve body can enter the magnetic core cavity 41, the hydraulic force applied by the valve body 20 is reduced, and therefore the damping characteristic curve pressure size and range space of the damping valve 100 in the compression stroke are improved.

Specifically, as shown in fig. 1 and 9, the magnetic circuit assembly 40 includes a connecting sleeve 42, a solenoid coil assembly 43, a first yoke bush 44, a magnetic core 45, and a second yoke bush 46, the connecting sleeve 42 is connected to the valve housing assembly 10, the solenoid coil assembly 43 is disposed in the connecting sleeve 42, the first yoke bush 44 is disposed in the solenoid coil assembly 43, a yoke piece 49 is disposed on a side of the first yoke bush 44 facing away from the second yoke bush 46, the magnetic core 45 is disposed in the first yoke bush 44, the tappet assembly 50 is disposed on the magnetic core 45, the second yoke bush 46 is disposed on a side of the magnetic core 45 facing the valve body 20, and the second yoke bush 46 is provided with a pole shoe corresponding to the magnetic core 45. Compared with the traditional damping valve, the magnetic circuit part at the magnetic core 45 has simpler structural design and easier processing technology after having no back damping back pressure runner hole. The electromagnetic coil assembly 43 may be a solenoid subassembly.

The pole shoe of the second yoke bush 46 can attract the movement of the magnetic core 45 in the magnetic circuit, the relative position of the pole shoe and the magnetic core 45 is a basic structure for realizing forward and reverse regulation of the damping valve 100, when the electromagnetic force is to increase the action of the tappet ball 52 on the valve body 20, the damping valve 100 is a proportional regulating valve, and otherwise, is a reverse proportional valve. The axial dimension of the first yoke bush 44 is affected by the electromagnetic coil assembly 43, and the axial dimension of the electromagnetic coil assembly 43 can directly affect the maximum number of turns achieved by the physical dimension of the coil, so that the electromagnetic force of the electromagnetic field is changed, and the controllable maximum pressure of the damping characteristic curve is acted.

Further, as shown in connection with fig. 1, 8 and 9, the magnetic circuit assembly 40 includes a magnetism insulator 47, the magnetism insulator 47 is located between the first yoke bush 44 and the second yoke bush 46, and the first yoke bush 44 and the second yoke bush 46 are fixed to the magnetism insulator 47. Wherein, the magnetism isolating piece 47 does not have magnetism conducting performance, and the magnetism isolating piece 47 can realize the physical connection of the first yoke bush 44 and the second yoke bush 46 and form a complete and effective magnetic circuit. In addition, the magnetic conduction parts on the magnetic circuit assembly 40 are made of soft magnetic materials, and the soft magnetic materials can effectively reduce hysteresis, so that the damping curve is prevented from generating larger hysteresis due to electromagnetic force hysteresis, and the responsiveness of the damping valve 100 is reduced. A first sealing ring is arranged between the magnetism isolating member 47 and the first yoke bush 44, and the first sealing ring can play a role in sealing, so that the tightness of the magnetic circuit assembly 40 can be ensured. A second sealing ring is arranged between the magnetism isolating piece 47 and the connecting sleeve 42, and can play a role in sealing, so that the tightness of the magnetic circuit assembly 40 can be ensured.

Specifically, as shown in fig. 1, the second yoke bush 46 is provided with a magnetism insulator 48 opposed to the magnetic core 45 on a side facing the magnetic core 45. The magnetic isolation pad 48 does not have magnetic conduction performance, so that the magnetic isolation effect on the magnetic circuit assembly 40 and the valve housing 15 can be further enhanced, and the electromagnetic force of the magnetic circuit assembly 40 is prevented from being diffused, so that the acting force of the magnetic circuit assembly 40 on the damping valve 100 is improved.

Optionally, as shown in fig. 1, the magnetic circuit assembly 40 further includes an adjusting spring 60, where the adjusting spring 60 is a cylindrical spring with two ends and is coiled, so that the eccentric force of the spring can be reduced to cause serious wear of the magnetic core 45 in one direction, and the initial height and stiffness of the adjusting spring 60 determine the elastic force curve of the magnetic core 45.

Further, as shown in fig. 1 and 2, the valve housing assembly 10 includes a valve housing 15 and an end cap 16, the end cap 16 is disposed in the valve housing 15, a valve body transition chamber 17 is disposed on a side of the end cap 16 facing the valve body 20, and the valve body 20, the valve housing 15 and the end cap 16 partition a valve body recovery chamber 12, and the valve body transition chamber 17 is located between the valve body compression chamber 11 and the valve body recovery chamber 12. The valve body transition cavity 17 arranged at one side of the end cover 16 towards the valve body 20 is located between the valve body compression cavity 11 and the valve body restoration cavity 12, the valve body transition cavity 17 temporarily accommodates oil in a space of the damping valve 100 when the damping valve 100 compresses or restores, so that the compression and restoration actions of the damping valve 100 can be buffered to a certain extent, hydraulic pressure impact on the damping valve 100 is reduced, and the service life of the damping valve 100 can be effectively prolonged.

Optionally, as shown in connection with fig. 1, the valve housing assembly 10 further includes an end cap grommet 70, where the adjustable height of the end cap grommet 70, with the dimensions of other components being determined, changes the initial position of the magnetic core 45 relative to the pole piece, and may directly affect the effective acting segment of the electromagnetic force.

Specifically, the oil acting force applied to the valve body 20 during compression and recovery mainly comprises pressures and bearing surfaces at the valve body compression chamber 11, the valve body transition chamber 17, the valve body recovery chamber 12, the valve body back pressure chamber 13 and the valve body circulation chamber 14, wherein the bearing surfaces are structural inputs, the pressures are characteristic outputs, and when the effective radial dimensions of the corresponding chambers are changed, the damping characteristic curves can be correspondingly changed.

Further, when different currents are introduced into the electromagnetic coil assembly 43 to generate corresponding magnetic fields, under the action of the pole shoes, electromagnetic force attraction to the magnetic core 45 is formed, the magnetic core 45 pushes the tappet rod 51 and the tappet ball 52, the tappet ball 52 acts on the valve body 20 to change damping at the opening of the valve body 20, meanwhile, pressures of the valve body compression cavity 11 and the valve body restoration cavity 12 are respectively led into the back pressure cavity through the first throttling hole 21 and the second throttling hole 25, the specific gravity of electromagnetic force in a force system borne by the valve body 20 is improved, and the controllability of damping characteristic values of the electromagnetic force is improved.

The following describes the assembly procedure of the damping valve 100: 1. magnetic circuit assembly 40 is assembled: the first yoke bush 44 is filled with the electromagnetic coil assembly 43 and the yoke piece, the adjusting spring 60 is filled with the first yoke bush 44, the magnetic core 45 is placed, and the magnetic isolation pad 48, the magnetic isolation piece 47, the tappet rod 51 and the second yoke bush 46 are sequentially arranged; 2. valve housing assembly 10 is assembled: sequentially loading the tappet ball 52, the connecting sleeve 42 and the valve housing 15; 3. damping valve 100 assembly: incorporating the valve body 20, end cap grommet 70 and end cap 16.

The shock absorber according to the embodiment of the second aspect of the present utility model includes: the damping valve 100 of the above embodiment is thus configured, and the damping force adjustable space in the shock absorber can be improved.

An embodiment of a third aspect of the utility model includes: the damper of the embodiment is arranged in such a way that the softness and hardness adjustment of the chassis suspension of the vehicle can be improved, thereby improving the comfort and the operability of the vehicle.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (20)

1. A damper valve, comprising:

a valve housing assembly;

the valve body is arranged in the valve shell assembly, and the valve body and the valve shell assembly are separated into a valve body compression cavity and a valve body back pressure cavity; and

the valve plate assembly is arranged in the valve body back pressure cavity and selectively conducts the valve body compression cavity and the valve body back pressure cavity.

2. The damper valve according to claim 1, wherein a first orifice communicating the valve body compression chamber and the valve body back pressure chamber is provided on the valve body;

the valve plate assembly includes: valve block and elastic component, the valve block set up in on the valve body and sealed first orifice, the elastic component butt is in between the valve block and the valve housing subassembly.

3. The damping valve according to claim 2, wherein a limiting step is provided on the valve body, the liquid outlet end of the first orifice is provided on the limiting step, and the valve plate is sleeved on the valve body and is provided on the limiting step.

4. A damper valve according to claim 3, wherein the valve body comprises: the valve plate is sleeved on the first valve body and is in clearance fit with the first valve body.

5. The damper valve of claim 4, wherein said first orifice is obliquely inwardly pierced to said valve body compression chamber at said limiting step.

6. The damper valve of claim 2, wherein the resilient member is a coil spring having a large diameter end and a small diameter end, the small diameter end abutting the valve plate and the large diameter end abutting the valve housing assembly.

7. The damper valve of claim 2, wherein the valve body and the valve housing assembly further define a valve body return chamber, the valve body compression chamber selectively communicating with the valve body return chamber, the valve body return chamber and the valve body back pressure chamber being axially spaced apart on the outer periphery of the valve body, a second orifice being disposed between the valve body and the valve housing assembly communicating the valve body return chamber and the valve body back pressure chamber.

8. The damper valve according to claim 7, wherein the second orifice is plural, and plural second orifices are provided at intervals on the outer periphery of the valve body.

9. The damper valve according to claim 7, wherein a drain hole is provided on an outer periphery of the valve plate, the drain hole corresponding to the second orifice.

10. The damper valve of claim 1, further comprising:

the magnetic circuit assembly is arranged on the valve shell assembly, a valve body circulation cavity is separated among the magnetic circuit assembly, the valve body and the valve shell assembly, and the valve body circulation cavity is communicated with the valve body compression cavity;

and the tappet assembly is movably arranged on the magnetic circuit assembly and selectively conducts the valve body circulation cavity and the valve body back pressure cavity under the magnetic action of the magnetic circuit assembly.

11. The damping valve of claim 10, wherein the tappet assembly comprises:

a tappet rod movably disposed to the magnetic circuit assembly;

and the tappet ball body is arranged at one end of the tappet stay rod, which faces the valve body, and is matched with the valve body.

12. The damping valve of claim 11, wherein a first channel is formed in the valve body, the first channel is connected between the valve body flow chamber and the valve body back pressure chamber, a mating conical surface is disposed on a side of the first channel facing the tappet ball, a first spherical surface is disposed on an end of the tappet ball facing the first channel, and the mating conical surface mates with the first spherical surface and has a gap.

13. The damping valve of claim 12, wherein an end of the tappet rod facing the valve body is provided with a mounting groove, a second spherical surface is provided in the mounting groove, an end of the tappet ball facing away from the first channel is provided with a third spherical surface, and the second spherical surface is matched with the third spherical surface.

14. The damper valve of claim 12, wherein the tappet ball is provided with a second passage, the tappet rod is provided with a third passage, a core cavity is provided within the magnetic circuit assembly, the second passage is connected between the first passage and the third passage, and the third passage is in communication with the core cavity.

15. The damper valve of claim 10, wherein the magnetic circuit assembly comprises:

the connecting sleeve is connected to the valve housing assembly;

the electromagnetic coil assembly is arranged in the connecting sleeve;

the first yoke sleeve is arranged in the electromagnetic coil assembly;

the magnetic core is arranged in the first yoke bush, and the tappet assembly is arranged on the magnetic core;

the second yoke bush is arranged on one side of the magnetic core, which faces the valve body, and the second yoke bush is provided with a pole shoe corresponding to the magnetic core.

16. The damper valve of claim 15, wherein the magnetic circuit assembly comprises: the magnetism isolating piece is positioned between the first yoke bush and the second yoke bush, and the first yoke bush and the second yoke are fixed on the magnetism isolating piece.

17. The damper of claim 15, wherein a side of the second yoke bush facing the magnetic core is disposed on an opposing magnetically isolated pad of the magnetic core.

18. The damper valve of claim 1, wherein the valve housing assembly comprises:

a valve housing;

the end cover is arranged in the valve shell, a valve body transition cavity is formed in one side, facing the valve body, of the end cover, the valve body, the valve shell and the end cover are further separated into a valve body restoration cavity, and the valve body transition cavity is located between the valve body compression cavity and the valve body restoration cavity.

19. A shock absorber, comprising: the damper valve of any one of claims 1-18.

20. A vehicle, characterized by comprising: the shock absorber of claim 19.