CN212360616U - Shock absorber with electromagnetic adjusting device - Google Patents

Abstract

The utility model provides a bumper shock absorber with electromagnetic adjusting device establishes outside outer valve barrel through the electromagnetism ring cover and drives the movable sleeve, drives the case removal when making the movable sleeve remove, and then opens or close second group's oily passageway of crossing to and the oil mass of crossing of oily passageway of second group is adjusted to the range of motion through the case. Compared with the prior art that the rigidity of the shock absorber cannot be adjusted or the manual adjusting valve wastes time and labor, the rigidity of the shock absorber can be automatically adjusted in real time according to the instruction of a vehicle control system, and the rigidity adjustment of the shock absorber under various working conditions can be more sensitively adapted. Further, a greater variety of adjusting modes are generated, the rigidity adjusting modes of the shock absorber are richer, and a more appropriate adjusting mode can be selected according to different application scenes.

Description

Shock absorber with electromagnetic adjusting device

Technical Field

The utility model relates to a shock attenuation technique particularly, relates to the bumper shock absorber with electromagnetic adjusting device.

Background

At present, the hydraulic shock absorber is widely applied to the field of automobiles, and damping force of the hydraulic shock absorber is mainly generated by oil passing holes and valve plates. In the prior art, because the aperture of the oil passing hole and the valve plate are fixed in a damping mode, the damping force is only related to the relative movement speed between the vehicle body and the wheels, the damping force cannot be correspondingly adjusted along with different working conditions of the vehicle, the requirement of an automobile suspension system on the damping force cannot be completely met, and the riding comfort and the operation stability of the vehicle cannot be considered at the same time.

With the development of the technology, some technologies for adjusting the oil passing amount between the inner working cylinder and the outer reserve cylinder by arranging a regulating valve at the bottom of the working cylinder appear in the prior art, but the prior art still has a plurality of defects. For example, the adjustment capability is provided only when the piston rod is moved in one direction, and the adjustment valves are mounted at the bottom of the working and reserve tubes and tend to interfere with other structures. For example, the core structure of the regulating valve mostly adopts the matching of a spring and a valve plate, or the matching of the spring and a ball valve, the regulating precision is not high, the continuous regulation cannot be realized, the opening degree of the valve core of the regulating valve is difficult to keep stable under different working conditions due to the elastic characteristic of the spring, and the service life is short due to the easy aging of the spring. In addition, the existing hydraulic shock absorber has other defects, such as that the shock absorbing effect is to be improved when the piston rod is in a stretching stroke in the working cylinder.

In addition, the governing valve among the prior art is mostly manual governing valve, is set up by the producer according to the motorcycle type when assembling in the vehicle, and the user is difficult to adjust the rigidity to hydraulic damper during subsequent use and adjusts. Some regulating valves using the solenoid valve only have an overflowing channel inside, and are closed or opened by the solenoid valve, or the overflowing channel is opened by the solenoid valve or closed by the solenoid valve, so that the regulating mode is single.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides a shock absorber with electromagnetic adjusting device, concrete technical scheme is as follows:

a shock absorber with an electromagnetic adjusting device comprises a piston assembly, an outer cylinder, a middle cylinder, an inner cylinder, a bottom valve assembly and an electromagnetic adjusting valve, wherein the bottom of the inner cylinder is communicated with or closed to the outer cylinder through the bottom valve assembly, the piston assembly comprises a piston rod and a piston body, the piston rod is configured to drive the piston body to slide in the inner cylinder, the piston body is configured to form dynamic seal for oil with a cylinder wall of the inner cylinder, and the piston body is provided with a first group of oil passing channels and a piston valve plate assembly configured to open and close the first group of oil passing channels;

the upper side of the inner cylinder is provided with a circulation hole to be communicated with the middle cylinder, the electromagnetic regulating valve comprises a valve core, an outer valve sleeve, a movable sleeve and an electromagnetic ring, the valve core is sleeved in the outer valve sleeve, a second group of oil passing channels for communicating the middle cylinder with the outer cylinder are formed between the valve core and the outer valve sleeve, the movable sleeve is positioned in a cavity of the outer valve sleeve and sleeved on the valve core, the electromagnetic ring is sleeved outside the outer valve sleeve and drives the movable sleeve, the movable sleeve drives the valve core to move when moving, so that the second group of oil passing channels are opened or closed, and the oil passing amount of the second group of oil passing channels is regulated through the moving amplitude of the valve core;

and an elastic component is also arranged in the cavity of the outer valve sleeve and used for pushing the movable sleeve and the valve core to reset when the electromagnetic ring does not drive the movable sleeve.

In a specific embodiment, the electromagnetic ring comprises an insulating ring and an electromagnetic coil encapsulated in the insulating ring, and the insulating ring is sleeved at a preset position on the outer valve sleeve, so that the electromagnetic coil drives the movable sleeve through electromagnetic action;

preferably, the insulating ring is detachably sleeved on the outer valve sleeve.

In a specific embodiment, the cavity of the outer valve sleeve comprises a front cavity, a middle cavity and a rear cavity which are sequentially communicated, the middle section of the valve core penetrates through the middle cavity, the front section of the valve core extends into the front cavity, the rear section of the valve core extends into the rear cavity, a matched sealing inclined plane is arranged between the middle section of the valve core and the cavity wall of the middle cavity, and the second group of oil passing channels comprise gaps between the sealing inclined planes;

the cavity wall of the middle cavity is provided with a plurality of overflowing holes for communicating the middle cavity with the outer cylinder;

preferably, the outer surface of the middle section of the valve core is provided with a receiving groove for receiving fluid, and further preferably, the receiving groove is an annular receiving groove, and a groove wall on one side of the annular receiving groove is an inclined surface to form the sealing inclined surface.

In a specific embodiment, the valve core further comprises an inner end cover, the radial outer surface of the inner end cover is in threaded fit with the cavity wall of the rear cavity, a group of stepped grooves are formed in the axial inner end surface of the inner end cover, each stepped groove comprises a first groove and a second groove located at the bottom of the first groove, the second groove is used for penetrating through the rear section of the valve core, and a third groove is formed in the end surface of the movable sleeve, facing one side of the inner end cover;

the elastic assembly comprises a first spring and a second spring, the first spring is arranged in the front cavity and abutted against the front section of the valve core, the second spring is sleeved on the rear section of the valve core, one end of the second spring is abutted against the first groove, and the other end of the second spring is abutted against the third groove;

preferably, the front cavity is provided with a supporting sheet which is a hollow structure, one end of the first spring is abutted against the supporting sheet, and the other end of the first spring is abutted against the front section of the valve element.

In a specific embodiment, an axial oil passing hole is formed in the center of the valve core and is communicated with the front cavity, a radial oil passing hole is further formed in the rear section of the valve core and is communicated with the axial oil passing hole and the rear cavity, the radial oil passing hole is located between the first groove and the third groove, and a gap is formed between the movable sleeve and the rear section of the valve core and/or the cavity wall of the rear cavity;

the end face of the inner end cover is provided with a sealing assembly, the radial outer surface of the sealing assembly seals the cavity wall of the rear cavity, and the axial end face of the sealing assembly is used for forming end face sealing on the movable sleeve when the sealing assembly is abutted to the movable sleeve.

In a specific embodiment, the seal assembly comprises a T-shaped sealing sleeve and an O-shaped sealing ring, the large diameter section of the T-shaped sealing sleeve is located on the end surface of the inner end cover, the radial outer surface of the large diameter section of the T-shaped sealing sleeve seals the cavity wall of the rear cavity, the axial end surface of the large diameter section of the T-shaped sealing sleeve is used for forming an end surface seal for the movable sleeve when the movable sleeve is abutted against, and the small diameter section of the T-shaped sealing sleeve is located in the first groove;

the O-shaped sealing ring is arranged between the large-diameter section of the T-shaped sealing sleeve and the end face of the inner end cover, and the radial outer surface of the O-shaped sealing ring seals the cavity wall of the rear cavity;

preferably, the hardness of the T-shaped sealing sleeve is greater than that of the O-shaped sealing ring.

In a specific embodiment, a step is arranged between the middle section and the rear section of the valve core, a soft metal gasket is arranged at the step, and the diameter of the soft metal gasket is larger than the inner diameter of the middle cavity, so that when the middle section of the valve core is completely pushed into the middle cavity by the movable sleeve, the soft metal gasket is compressed by the movable sleeve to realize sealing.

In a specific embodiment, the valve further comprises a lock nut, the lock nut is positioned on the outer side of the inner end cover, and the lock nut is in threaded fit with the outer valve sleeve;

preferably, the outer side of the locking nut is provided with a rubber cover, and the rubber cover is embedded into the outer valve sleeve;

preferably, the outer side surface of the inner end cap has a polygonal protrusion, and the polygonal protrusion is located in the central hole of the nut.

The utility model discloses following beneficial effect has at least:

the utility model discloses in, establish outside outer valve barrel and drive the movable sleeve through the electromagnetism ring cover, drive the case and remove when making the movable sleeve remove, and then open or close the oily passageway of second group to and the oil mass of crossing oily passageway of second group is adjusted to the range of motion through the case. Compared with the prior art that the rigidity of the shock absorber cannot be adjusted or the manual adjusting valve wastes time and labor, the rigidity of the shock absorber can be automatically adjusted in real time according to the instruction of a vehicle control system, and the rigidity adjustment of the shock absorber under various working conditions can be more sensitively adapted.

Furthermore, the center of the valve core is provided with an axial oil passing hole which is communicated with the front cavity, the rear section of the valve core is also provided with a radial oil passing hole which is communicated with the axial oil passing hole and the rear cavity, the radial oil passing hole is positioned between the first groove and the third groove, and a gap is formed between the movable sleeve and the rear section of the valve core and/or the cavity wall of the rear cavity. Therefore, even if a matched sealing inclined plane is arranged between the middle section of the valve core and the cavity wall of the middle cavity for closing, part of fluid still flows between the middle cylinder and the outer cylinder to realize conduction through the front cavity, the axial oil passing hole, the radial oil passing hole, the rear cavity, the middle cavity and the flow passing hole to realize the throttling and damping effects. Compared with the damper for manually or electrically adjusting rigidity in the prior art, the electromagnetic adjusting valve is internally provided with two kinds of flow-through structures which can be used together or independently, so that more kinds of adjusting modes are generated, the rigidity adjusting modes of the damper are richer, more proper adjusting modes can be selected according to different application scenes, for example, under the condition of relatively flat road surface, a control system can not act on an electromagnetic ring, and the electromagnetic valve can still play the throttling and damping effects.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a sectional view of a shock absorber with an electromagnetic adjusting device according to embodiment 1 of the present invention;

FIG. 2 is an enlarged view of the area A in FIG. 1;

FIG. 3 is an enlarged view of the area B in FIG. 1;

FIG. 4 is a schematic view of a valve cartridge;

fig. 5 is an enlarged view of the area C in fig. 1.

Description of the main element symbols:

1-a piston rod; 2-outer cylinder; 3-intermediate cylinder; 4-inner cylinder; 5-a director assembly; 6-bottom valve; 7-a piston assembly; 8-adjusting valve; 9-oil sealing; 10-flow-through holes; 11-a mounting seat; 12-an outer valve sleeve; 15-an overflow hole; 16-a front cavity; 17-a support sheet; 18-a first spring; 19-axial oil passing holes; 20-sealing the bevel; 21-a soft metal gasket; 22-a rear cavity; 23-a valve core; 231-the preceding paragraph; 232-middle section; 233-rear section; 13-accommodating grooves; 14-radial overflow hole; 24-a movable sleeve; 25-a second spring; 26-glue cover; 27-polygonal protrusions; 28-a lock nut; 29-inner end cap; a 30-O shaped seal ring; a 31-T shaped gland; 32-an electromagnetic ring; 71-a piston body; 72-upper piston valve plate; 73-lower piston valve plate; 74-a nut; 75-a first set of oil-passing channels; 76-a liner; 61-a base valve body; 62-upper bottom valve plate; 63-lower bottom valve plate; 64-an elastic member.

Detailed Description

Examples

Referring to fig. 1 to 5, the present embodiment provides a shock absorber with an electromagnetic adjusting device, wherein the shock absorber with the electromagnetic adjusting device is suitable for damping the body of a car, a truck, a motorcycle, and the like. Specifically, the shock absorber with the electromagnetic adjusting device comprises a piston assembly, an outer cylinder 2, an intermediate cylinder 3, an inner cylinder 4, a base valve assembly and an electromagnetic adjusting valve. It should be noted that the aforementioned piston assembly, outer cylinder 2, intermediate cylinder 3, inner cylinder 4, base valve assembly and solenoid valve are only necessary components for solving the technical problems to be solved by the present embodiment, and the manually adjustable damping shock absorber does not include only these components, for example, in order to facilitate the stable movement of the piston assembly in the inner cylinder 4 and to seal the respective cylinder bodies, the shock absorber with solenoid adjustment device further includes a pilot assembly and an oil seal which are disposed at the upper ends of the outer cylinder 2 and the inner cylinder 4 and cooperate with the inner edges of the outer cylinder 2 and the inner cylinder 4 to form a static seal against oil. For example, in order to facilitate the installation of the manually adjustable damping shock absorber, the bottom of the outer cylinder 2 is provided with a lifting lug, which is not illustrated in this embodiment.

The bottom of the inner cylinder 4 is communicated or closed with the outer cylinder 2 through the bottom valve assembly, the piston assembly comprises a piston rod 1 and a piston body, the piston rod 1 is configured to drive the piston body to slide in the inner cylinder 4, the piston body is configured to form dynamic seal for oil with the cylinder wall of the inner cylinder 4, and the piston body is provided with a first group of oil passing channels and a piston valve piece assembly configured to open and close the first group of oil passing channels. As an exemplary piston valve assembly, the piston valve assembly includes an upper piston valve plate 72 and a lower piston valve plate 73 disposed at upper and lower ends of the first group oil passage, and the upper piston valve plate 72 and the lower piston valve plate 73 are configured to respectively open corresponding passages of the first group oil passage 75 in one direction and in opposite directions. Specifically, the upper piston valve plate 72 is disposed at the upper end of the first group oil passing passage 75, and the first group oil passing passage 75 is opened only when the piston assembly 7 is in a compression stroke by an elastic member or a structural characteristic thereof, so that oil flows into the upper cylinder from the lower cylinder of the inner cylinder 4. The lower piston valve plate 73 is arranged at the lower end of the first group oil passing channel 75, and through elastic elements or self structural characteristics, the first group oil passing channel 75 is opened only when the piston assembly 7 is in a stretching stroke, so that oil flows into the lower cylinder from the upper cylinder of the inner cylinder 4. Specifically, the upper piston valve plate 72, the lower piston valve plate 73, and the piston body 71 are fixed to the piston rod 1 by nuts 74. Because no matter the piston assembly 7 is in a compression stroke or a stretching stroke, the piston assembly 7 can generate a damping effect by oil passing, so that the damping capacity of the shock absorber is obviously improved. Illustratively, a bushing 76 is disposed between the contact surface of the piston body 71 and the inner cylinder 4, the wear resistance of the bushing 76 is greater than that of the piston body 71, and the bushing 76 and the piston body 71 are fixedly connected by a zigzag convex-concave structure or by other structures, which will not be described in detail in this embodiment.

In this embodiment, the upper side of the inner cylinder 4 is opened with one or more flow holes to communicate with the intermediate cylinder 3.

In this embodiment, the electromagnetic regulating valve includes a valve core 23, an outer valve sleeve 12, a movable sleeve 24, and an electromagnetic ring 32, wherein the valve core 23 is sleeved in the outer valve sleeve 12, and a second group of oil passing channels for communicating the intermediate cylinder 3 and the outer cylinder 2 are formed between the two, the movable sleeve 24 is located in the cavity of the outer valve sleeve 12 and is sleeved on the valve core 23, and the electromagnetic ring 32 is sleeved outside the outer valve sleeve 12 and drives the movable sleeve 24, so that the movable sleeve 24 drives the valve core 23 to move when moving, and then the second group of oil passing channels is opened or closed, and the oil passing amount of the second group of oil passing channels is adjusted by the moving amplitude of the valve core 23.

Specifically, the cavity of the outer valve housing 12 includes a front cavity 16, a middle cavity and a back cavity 22 which are sequentially communicated, a middle section 232 of the valve core 23 passes through the middle cavity, a front section 231 extends into the front cavity 16, a back section 233 extends into the back cavity 22, and a matched sealing inclined plane 20 is arranged between the middle section 232 of the valve core 23 and the cavity wall of the middle cavity.

Wherein, the second group of oil passing channel comprises a clearance between the sealing inclined planes 20, when the sealing inclined plane 20 of the middle section 232 of the valve core 23 approaches the sealing inclined plane 20 of the cavity wall of the middle cavity, the clearance between the two is reduced to reduce the oil passing amount, and when the sealing is completely pressed, the oil passing amount between the two is reduced to the minimum, even to zero. When the sealing inclined surface 20 of the middle section 232 of the valve core 23 is far away from the sealing inclined surface 20 of the cavity wall of the middle cavity, the clearance between the two is increased, and the oil passing amount is increased.

Specifically, the wall of the intermediate chamber is provided with a plurality of overflowing holes 15 for communicating the intermediate chamber with the outer cylinder 2.

Preferably, the outer surface of the middle section 232 of the valve core 23 is provided with a receiving groove 13 for receiving fluid, and further preferably, the receiving groove 13 is an annular receiving groove 13, and a groove wall on one side of the annular receiving groove 13 is beveled to form a sealing bevel 20. Therefore, the fluid can be firstly collected in the containing groove 13 and then flows from the containing groove 13 to the overflowing hole 15 on the cavity wall of the middle cavity, so that the overflowing rate of the overflowing hole 15 can be increased, and the effective smoothness can be kept.

In this embodiment, the electromagnetic ring 32 is sleeved outside the outer valve sleeve 12 and drives the movable sleeve 24, so that the movable sleeve 24 drives the valve core 23 to move when moving, thereby opening or closing the second group of oil passing channels, and the oil passing amount of the second group of oil passing channels is adjusted by the moving amplitude of the valve core 23. Compared with the prior art that the rigidity of the shock absorber cannot be adjusted or the manual adjusting valve wastes time and labor, the rigidity of the shock absorber can be automatically adjusted in real time according to the instruction of a vehicle control system, and the rigidity adjustment of the shock absorber under various working conditions can be more sensitively adapted.

In this embodiment, the electromagnetic ring 32 includes an insulating ring and an electromagnetic coil enclosed in the insulating ring, and the insulating ring is sleeved on a predetermined position on the outer valve housing 12, so that the electromagnetic coil drives the movable sleeve 24 through electromagnetic action. Preferably, the insulating ring is detachably fitted over the outer valve housing 12.

In this embodiment, the valve further includes an inner end cap 29, a radial outer surface of the inner end cap 29 is in threaded fit with a cavity wall of the rear cavity 22, a group of stepped grooves is formed in an axial inner end surface of the inner end cap 29, each stepped groove includes a first groove and a second groove located at a bottom of the first groove, the second groove is used for penetrating through the rear section 233 of the valve element 23, and a third groove is formed in an end surface of the movable sleeve 24 facing one side of the inner end cap 29.

In this embodiment, an elastic component is further disposed in the cavity of the outer valve housing 12, and is used for pushing the movable sleeve 24 and the valve core 23 to reset when the electromagnetic ring 32 does not drive the movable sleeve 24.

Preferably, the elastic assembly comprises a first spring 18 and a second spring 25, the first spring 18 is arranged in the front cavity 16 and is abutted against the front section 231 of the valve core 23, the second spring 25 is sleeved on the rear section 233 of the valve core 23, one end of the second spring 25 is abutted against the first groove, and the other end of the second spring 25 is abutted against the third groove. Thus, the first spring 18 is used for the return of the spool 23, and the second spring 25 is used for the return of the movable sleeve 24.

Preferably, in the reset state of the valve core 23, the sealing inclined plane 20 of the middle section 232 of the valve core 23 presses the sealing inclined plane 20 of the cavity wall of the middle cavity.

Preferably, the movable sleeve 24 is in the reset condition, where it compresses the step between the intermediate chamber and the rear chamber 22.

Preferably, the front cavity 16 is provided with a support plate 17, the support plate 17 is a hollow structure, and one end of the first spring 18 abuts against the support plate 17, and the other end abuts against the front section 231 of the valve element 23.

In this embodiment, the center of the valve core 23 is provided with an axial oil passing hole 19, the axial oil passing hole 19 is communicated with the front cavity 16, the rear section 233 of the valve core 23 is further provided with a radial oil passing hole 14, the radial oil passing hole 14 is communicated with the axial oil passing hole 19 and the rear cavity 22, the radial oil passing hole 14 is located between the first groove and the third groove, and a gap is formed between the movable sleeve 24 and the rear section 233 of the valve core 23 and/or the cavity wall of the rear cavity 22.

In this embodiment, the end face of the inner end cap 29 is provided with a sealing assembly, the radially outer surface of the sealing assembly seals the cavity wall of the rear cavity 22, and the axial end face of the sealing assembly is used for forming an end face seal for the movable sleeve 24 when abutting against the movable sleeve 24.

Because the center of the valve core 23 is provided with the axial oil passing hole 19, the axial oil passing hole 19 is communicated with the front cavity 16, the rear section 233 of the valve core 23 is also provided with the radial oil passing hole 14, the radial oil passing hole 14 is communicated with the axial oil passing hole 19 and the rear cavity 22, the radial oil passing hole 14 is positioned between the first groove and the third groove, and a gap is formed between the movable sleeve 24 and the rear section 233 of the valve core 23 and/or the cavity wall of the rear cavity 22. Therefore, even if the matched sealing inclined plane 20 is arranged between the middle section 232 of the valve core 23 and the cavity wall of the middle cavity and closed, part of fluid still flows between the middle cylinder 3 and the outer cylinder 2 and is communicated through the front cavity 16, the axial oil passing hole 19, the radial oil passing hole 14, the rear cavity 22, the middle cavity and the oil passing hole 15, and the throttling and damping effects are achieved. Compared with the damper for manually or electrically adjusting rigidity in the prior art, the electromagnetic adjusting valve is internally provided with two kinds of flow-through structures which can be used together or independently, so that more kinds of adjusting modes are generated, the rigidity adjusting modes of the damper are richer, more proper adjusting modes can be selected according to different application scenes, for example, under the working condition that the road surface is smoother, the control system does not act on the electromagnetic ring 32, and the electromagnetic valve can still play the throttling and damping effects.

Preferably, the sealing assembly comprises a T-shaped sealing sleeve 31 and an O-ring 30, the large diameter section of the T-shaped sealing sleeve 31 being located at the end face of the inner end cap 29, the radially outer surface of the large diameter section of the T-shaped sealing sleeve 31 sealing against the cavity wall of the rear cavity 22, the axial end face of the large diameter section of the T-shaped sealing sleeve 31 being adapted to form an end face seal against the movable sleeve 24 when abutting against the movable sleeve 24, and the small diameter section of the T-shaped sealing sleeve 31 being located in the first groove.

Wherein, the O-shaped sealing ring 30 is arranged between the large diameter section of the T-shaped sealing sleeve 31 and the end surface of the inner end cover 29, and the radial outer surface of the O-shaped sealing ring 30 seals the cavity wall of the rear cavity 22.

Preferably, the T-shaped gland 31 has a hardness greater than that of the O-ring seal 30. Based on the unique design, on one hand, the T-shaped sealing sleeve 31 and the O-shaped sealing ring 30 act together to enhance the sealing effect, and on the other hand, the impact of the movable sleeve 24 can be better resisted.

In this embodiment, a step is formed between the middle section 232 and the rear section 233 of the valve core 23, and the soft metal gasket 21 is disposed at the step, and the diameter of the soft metal gasket 21 is greater than the inner diameter of the middle cavity, so that when the movable sleeve 24 completely pushes the middle section 232 of the valve core 23 into the middle cavity, that is, when the movable sleeve 24 is in the reset state, the soft metal gasket 21 is compressed by the movable sleeve 24 to realize sealing.

In this embodiment, a lock nut 28 is further included, the lock nut 28 being located outside the inner end cap 29, the lock nut 28 being in threaded engagement with the outer valve housing 12.

Preferably, the outside of the lock nut 28 has a glue cap 26, and the glue cap 26 is embedded in the outer valve housing 12.

Preferably, the outer side surface of the inner end cap has a polygonal protrusion 27, and the polygonal protrusion 27 is located in the central hole of the nut.

According to the damper with an electromagnetic adjusting device of the present embodiment, the first adjusting method thereof includes: the electromagnetic ring 32 is electrified, the electromagnetic ring 32 generates magnetic force to drive the movable sleeve 24 to move so as to increase the flow rate of the second group of oil passing channels, and the flow rate of the second group of oil passing channels is increased when the current of the electromagnetic ring 32 is larger.

The second adjusting method of the shock absorber with the electromagnetic adjusting device according to the present embodiment includes: the electromagnetic ring 32 is electrified, the electromagnetic ring 32 generates magnetic force to drive the movable sleeve 24 to move so as to reduce the flow of the second group of oil passing channels, and the flow of the second group of oil passing channels is smaller when the current of the electromagnetic ring 32 is larger.

To facilitate implementation by those skilled in the art, the present implementation also provides an exemplary base valve assembly 6, the base valve assembly 6 including a base valve body 61, a base valve plate, and a spring 64. The bottom valve plate comprises an upper bottom valve plate 62 and a lower bottom valve plate 63 which are arranged at the upper end and the lower end of the bottom valve body 61, the upper bottom valve plate 62 and the lower bottom valve plate 63 are configured to respectively open corresponding channels in the bottom valve body 61 in a one-way mode, and the opening directions are opposite. Specifically, the upper base valve plate 62 is disposed at the upper end of the base valve body 61, and opens a corresponding passage in the base valve body 61 only when the piston assembly 7 is in a tensile stroke, by means of the elastic member 64 or its own structural characteristics, so that oil flows from the outer cylinder 2 into the inner cylinder 4. The lower base plate 63 is disposed at the lower end of the base valve body 61, and opens a corresponding passage in the base valve body 61 only when the piston assembly 7 is in a compression stroke by means of the elastic member 64 or its own structural characteristics, so that the oil flows into the outer cylinder 2 from the inner cylinder 4.

Those skilled in the art will appreciate that the drawings are merely schematic representations of one preferred implementation scenario and that the blocks or flow diagrams in the drawings are not necessarily required to practice the present invention.

Those skilled in the art will appreciate that the modules in the devices in the implementation scenario may be distributed in the devices in the implementation scenario according to the description of the implementation scenario, or may be located in one or more devices different from the present implementation scenario with corresponding changes. The modules of the implementation scenario may be combined into one module, or may be further split into a plurality of sub-modules.

The sequence numbers of the present invention are only for description, and do not represent the advantages and disadvantages of the implementation scenario.

The above disclosure is only a few specific implementation scenarios of the present invention, however, the present invention is not limited thereto, and any changes that can be considered by those skilled in the art shall fall within the protection scope of the present invention.

Claims (14)

1. The shock absorber with the electromagnetic adjusting device is characterized by comprising a piston assembly, an outer cylinder, a middle cylinder, an inner cylinder, a bottom valve assembly and an electromagnetic adjusting valve, wherein the bottom of the inner cylinder is communicated with or closed to the outer cylinder through the bottom valve assembly;

the upper side of the inner cylinder is provided with a circulation hole to be communicated with the middle cylinder, the electromagnetic regulating valve comprises a valve core, an outer valve sleeve, a movable sleeve and an electromagnetic ring, the valve core is sleeved in the outer valve sleeve, a second group of oil passing channels for communicating the middle cylinder with the outer cylinder are formed between the valve core and the outer valve sleeve, the movable sleeve is positioned in a cavity of the outer valve sleeve and sleeved on the valve core, the electromagnetic ring is sleeved outside the outer valve sleeve and drives the movable sleeve, the movable sleeve drives the valve core to move when moving, so that the second group of oil passing channels are opened or closed, and the oil passing amount of the second group of oil passing channels is regulated through the moving amplitude of the valve core;

and an elastic component is also arranged in the cavity of the outer valve sleeve and used for pushing the movable sleeve and the valve core to reset when the electromagnetic ring does not drive the movable sleeve.

2. The damper with electromagnetic adjustment device of claim 1, wherein the electromagnetic ring includes an insulating ring and an electromagnetic coil enclosed in the insulating ring, the insulating ring is disposed at a predetermined position on the outer valve housing, such that the electromagnetic coil electromagnetically drives the movable housing.

3. The shock absorber with electromagnetic adjustment device as set forth in claim 2, wherein said insulating ring is detachably fitted over said outer valve sleeve.

4. The shock absorber with the electromagnetic adjusting device as recited in claim 1, wherein the cavity of the outer valve sleeve comprises a front cavity, a middle cavity and a rear cavity which are sequentially communicated, the middle section of the valve core passes through the middle cavity, the front section of the valve core extends into the front cavity, the rear section of the valve core extends into the rear cavity, a matched sealing inclined plane is arranged between the middle section of the valve core and the cavity wall of the middle cavity, and the second group of oil passing channels comprise gaps between the sealing inclined planes;

and the cavity wall of the middle cavity is provided with a plurality of overflowing holes for communicating the middle cavity with the outer cylinder.

5. The damper with electromagnetic adjusting device according to claim 4, characterized in that the outer surface of the middle section of the valve core is provided with a receiving groove for receiving fluid, the receiving groove is an annular receiving groove, and one side groove wall of the annular receiving groove is beveled to form the sealing bevel.

6. The shock absorber with the electromagnetic adjusting device as claimed in claim 4, further comprising an inner end cap, wherein the radial outer surface of the inner end cap is in threaded fit with the cavity wall of the rear cavity, the axial inner end surface of the inner end cap is provided with a set of stepped grooves, the stepped grooves include a first groove and a second groove located at the bottom of the first groove, the second groove is used for penetrating the rear section of the valve core, and the end surface of the movable sleeve facing one side of the inner end cap is provided with a third groove;

the elastic assembly comprises a first spring and a second spring, the first spring is arranged in the front cavity and abutted against the front section of the valve core, the second spring is sleeved on the rear section of the valve core, one end of the second spring is abutted against the first groove, and the other end of the second spring is abutted against the third groove.

7. The shock absorber with the electromagnetic adjusting device as claimed in claim 6, wherein the front cavity is provided with a support sheet, the support sheet is a hollow structure, one end of the first spring abuts against the support sheet, and the other end of the first spring abuts against the front section of the valve core.

8. The shock absorber with the electromagnetic adjusting device according to claim 6, wherein an axial oil passing hole is formed in the center of the valve core and is communicated with the front cavity, a radial oil passing hole is further formed in the rear section of the valve core and is communicated with the axial oil passing hole and the rear cavity, the radial oil passing hole is located between the first groove and the third groove, and a gap is formed between the movable sleeve and the rear section of the valve core and/or the cavity wall of the rear cavity;

the end face of the inner end cover is provided with a sealing assembly, the radial outer surface of the sealing assembly seals the cavity wall of the rear cavity, and the axial end face of the sealing assembly is used for forming end face sealing on the movable sleeve when the sealing assembly is abutted to the movable sleeve.

9. The shock absorber with electromagnetic adjustment device according to claim 8, characterized in that the sealing assembly comprises a T-shaped sealing sleeve and an O-ring, the large diameter section of the T-shaped sealing sleeve is located at the end face of the inner end cap, the radially outer surface of the large diameter section of the T-shaped sealing sleeve seals the cavity wall of the rear cavity, the axial end face of the large diameter section of the T-shaped sealing sleeve is used for forming an end face seal against the movable sleeve when abutting against the movable sleeve, and the small diameter section of the T-shaped sealing sleeve is located in the first groove;

the O-shaped sealing ring is arranged between the large-diameter section of the T-shaped sealing sleeve and the end face of the inner end cover, and the radial outer surface of the O-shaped sealing ring seals the cavity wall of the rear cavity.

10. The shock absorber with electromagnetic adjustment device of claim 9, wherein the T-shaped sealing boot has a hardness greater than the O-ring.

11. The shock absorber with the electromagnetic adjusting device as recited in claim 8, wherein a step is provided between the middle section and the rear section of the valve core, and a soft metal gasket is provided at the step and has a diameter larger than an inner diameter of the middle cavity, so that when the middle section of the valve core is completely pushed into the middle cavity by the movable sleeve, the soft metal gasket is compressed by the movable sleeve to achieve sealing.

12. The shock absorber with electromagnetic adjustment device of claim 1, further comprising a lock nut located outside the inner end cap, the lock nut being threadedly engaged with the outer valve housing.

13. The shock absorber with electromagnetic adjustment device as set forth in claim 12, wherein an outer side of said lock nut has a rubber cap embedded in said outer valve housing.

14. The electromagnetic adjusting device-equipped shock absorber according to claim 12, wherein the outer side surface of the inner end cap has a polygonal protrusion, which is located in the central hole of the nut.

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