CN112253669A - Semi-active shock absorber - Google Patents
Semi-active shock absorber Download PDFInfo
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- CN112253669A CN112253669A CN202011155980.4A CN202011155980A CN112253669A CN 112253669 A CN112253669 A CN 112253669A CN 202011155980 A CN202011155980 A CN 202011155980A CN 112253669 A CN112253669 A CN 112253669A
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- oil
- main valve
- assembly
- cavity
- oil way
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/50—Special means providing automatic damping adjustment, i.e. self-adjustment of damping by particular sliding movements of a valve element, other than flexions or displacement of valve discs; Special means providing self-adjustment of spring characteristics
- F16F9/512—Means responsive to load action, i.e. static load on the damper or dynamic fluid pressure changes in the damper, e.g. due to changes in velocity
- F16F9/5123—Means responsive to load action, i.e. static load on the damper or dynamic fluid pressure changes in the damper, e.g. due to changes in velocity responsive to the static or steady-state load on the damper
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/34—Special valve constructions; Shape or construction of throttling passages
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/50—Special means providing automatic damping adjustment, i.e. self-adjustment of damping by particular sliding movements of a valve element, other than flexions or displacement of valve discs; Special means providing self-adjustment of spring characteristics
- F16F9/512—Means responsive to load action, i.e. static load on the damper or dynamic fluid pressure changes in the damper, e.g. due to changes in velocity
- F16F9/5126—Piston, or piston-like valve elements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2222/00—Special physical effects, e.g. nature of damping effects
- F16F2222/12—Fluid damping
Abstract
The invention discloses a semi-active shock absorber, which comprises an oil cylinder assembly, a connecting rod piston assembly, a bottom valve assembly and a digital proportional valve, wherein the oil cylinder assembly is connected with the connecting rod piston assembly through a connecting rod; the main valve assembly is provided with a first oil way and a second oil way, the oil inlet ends of the first oil way and the second oil way are respectively communicated with the middle cavity, and the oil outlet ends of the first oil way and the second oil way are respectively communicated with the oil storage cavity; when the coil assembly is not electrified, the first oil way is in a connected state, the second oil way is in a disconnected state, and the intermediate cavity is communicated with the oil storage cavity through the first oil way; when the coil assembly is electrified, the armature push rod assembly blocks the first oil way, the first oil way is in a disconnected state, and the intermediate cavity is communicated with the oil storage cavity through the second oil way. The digital proportional valve is adopted to adjust and control the throttling area of the oil liquid of the shock absorber, so that the damping force of the shock absorber is adjusted, the throttling area of the proportional valve can be continuously and randomly adjusted by controlling the duty ratio of an input signal, and the continuous adjustment and control of the damping force of the shock absorber are realized.
Description
Technical Field
The invention relates to the technical field of shock absorbers, in particular to a semi-active shock absorber.
Background
The requirements of the riding comfort/ride comfort and the handling stability of the automobile on the characteristics of the suspension damper are different according to different specific running conditions such as road surfaces, loads, automobile speeds, automobile motion states and the like, and are also different according to drivers. The ideal shock absorber characteristic can be adjusted to meet the requirements of different driving conditions and drivers, but the most commonly used suspension shock absorbers up to now are traditional passive shock absorbers, the damping characteristic of which cannot be adjusted and only can be compromised between controllability and comfort; the damping force of the conventional proportional valve controlled semi-active shock absorber can be automatically adjusted according to the road condition, but the proportional valve adopted by the shock absorber has high requirement on the machining precision of a proportional electromagnet, the adopted controller has a complex structure, and the related technology is monopolized abroad, so that great difficulty is brought to the localization of the proportional valve controlled semi-active shock absorber.
Disclosure of Invention
The invention provides a semi-active shock absorber aiming at the technical problems in the prior art.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a semi-active shock absorber comprises an oil cylinder assembly, a connecting rod piston assembly, a bottom valve assembly and a digital proportional valve;
the oil cylinder assembly comprises an outer cylinder barrel, an inner cylinder barrel and a working cylinder, an oil storage cavity is formed between the inner cylinder barrel and the outer cylinder barrel, an intermediate cavity is formed between the inner cylinder barrel and the working cylinder, and a working cavity is formed in the working cylinder;
the digital proportional valve comprises a switch valve assembly and a main valve assembly;
the switch valve assembly comprises a magnetic yoke iron assembly, a coil assembly, an armature push rod assembly and a pilot valve spring, wherein the armature push rod assembly and the coil assembly are arranged in the magnetic yoke iron assembly, the armature push rod assembly is in sliding fit with the magnetic yoke iron assembly, the coil assembly can push the armature push rod assembly to move along the axial direction of the magnetic yoke iron assembly when being electrified, and the pilot valve spring provides restoring force for the armature push rod assembly to restore to the initial position;
the main valve assembly is provided with a first oil way and a second oil way, the oil inlet ends of the first oil way and the second oil way are respectively communicated with the middle cavity, and the oil outlet ends of the first oil way and the second oil way are respectively communicated with the oil storage cavity;
when the coil assembly is not electrified, the first oil way is in a connected state, the second oil way is in a disconnected state, and the intermediate cavity is communicated with the oil storage cavity through the first oil way; when the coil assembly is electrified, the armature push rod assembly blocks the first oil way, the first oil way is in a disconnected state, and the intermediate cavity is communicated with the oil storage cavity through the second oil way.
In the above technical solution, further, the main valve assembly includes a main valve sleeve, a main valve core and a main valve seat, the main valve sleeve is provided with an upper chamber and a lower chamber, the main valve core is disposed in the lower chamber of the main valve sleeve and is in sliding fit with the lower chamber of the main valve sleeve, the main valve seat is disposed at an end of the lower chamber, a return spring is disposed between the main valve core and the main valve sleeve, the return spring applies an acting force to the main valve core to enable an end face of one end of the main valve core to be tightly fitted with an end face of one end of the main valve seat, the main valve seat and the main valve core are disposed in the main valve sleeve in a matching manner to divide the lower chamber into an independent oil inlet chamber and an oil outlet;
the main valve sleeve is provided with a first circulation channel communicated with the upper cavity and a first communication hole communicated with the upper cavity and the lower cavity, the main valve core is provided with a first oil outlet hole communicated with the oil inlet cavity and the oil outlet cavity, the main valve seat is provided with a first oil inlet hole and a second channel, the first oil inlet hole is communicated with the first circulation channel, and the main valve core is arranged at one end of the second channel to control the on-off of a second oil path;
the first oil inlet hole, the first flow channel, the upper cavity, the first communicating hole, the oil inlet cavity, the first oil outlet hole and the oil outlet cavity are sequentially connected to form a first oil way; the second channel is connected with the oil outlet cavity to form a second oil path;
the main valve assembly is arranged at the lower end of a magnetic yoke component of the switch valve, so that the upper cavity forms a sealed cavity, one end of the armature push rod component extends into the upper cavity, and the armature push rod component can control the on-off of the first oil path when moving along the axial direction.
In the above technical scheme, further, the armature push rod assembly is located above the first communication hole, and when the coil assembly is powered on, the armature push rod assembly is pushed to move towards the first communication hole, so that the first communication hole is blocked, and the first oil path is blocked.
In the above technical solution, further, the oil outlet is one or more U-shaped notches provided at the lower end of the main valve sleeve.
In the above technical scheme, further, be provided with first oil feed passageway on the main valve seat one end terminal surface, first oil feed passageway one end is connected with first inlet port, and the other end communicates with the second passageway.
In the above technical scheme, further, the first oil inlet passage is an open groove structure horizontally arranged on an end face of one end of the main valve seat.
In the technical scheme, furthermore, magnetic conduction yoke iron subassembly overcoat is equipped with the switching cover, threaded connection between magnetic conduction yoke iron subassembly and the switching cover, be provided with the adapter sleeve with the oil storage chamber intercommunication on the outer cylinder, digital proportional valve passes through the switching cover and installs in the adapter sleeve.
In the above technical scheme, further, an adapter tube communicated with the intermediate cavity is arranged on the inner cylinder, the main valve seat is arranged at one end of the adapter tube, the end face of the main valve seat is in sealing fit with the end face of the adapter tube, and the first oil path and the second oil path are respectively communicated with the intermediate cavity through the adapter tube.
The invention has the following beneficial effects:
1) according to the invention, the throttle area of the oil of the shock absorber is adjusted and controlled through the digital proportional valve, so that the adjustment of the damping force of the shock absorber is realized; the adopted digital proportional valve can perform high-frequency switching control on an oil way in the valve by controlling an input signal, and can realize continuous adjustment of the throttle area of the proportional valve by controlling the duty ratio of the input signal, thereby realizing continuous adjustment and control of the damping force of the shock absorber.
2) The digital proportional valve has the advantages that the switch valve assembly and the main valve assembly are designed, the integral structure of the proportional valve is simple and reasonable, the machining precision requirement on an oil circuit control part in the switch valve assembly is reduced through the optimized arrangement of the oil circuit structure on the main valve assembly, the control and the operation of the proportional valve are stable and reliable, the cost of the proportional valve can be effectively reduced, and the manufacturing cost of the shock absorber is reduced.
Drawings
Fig. 1 is a schematic structural view of a semi-active damper according to the present invention.
Fig. 2 is a partial schematic view of fig. 1 at B.
Fig. 3 is a schematic structural diagram of a digital proportional valve according to the present invention.
FIG. 4 is a schematic view of the structure of the on-off valve assembly of the present invention.
FIG. 5 is a schematic view of a main valve assembly according to the present invention.
Fig. 6 is a schematic structural view of a main valve sleeve in the invention.
Fig. 7 is a schematic sectional view of the main valve housing structure a-a of fig. 5.
Fig. 8 is a schematic sectional view of a main valve seat structure according to the present invention.
FIG. 9 is a schematic cross-sectional view of the main valve seat arrangement A-A of FIG. 5.
In the figure: 001. the digital proportional valve comprises (002), an oil cylinder assembly and a connecting rod piston assembly 003;
100. the switch valve assembly comprises a switch valve assembly 101, a magnetic yoke assembly 102, a coil assembly 103, an armature push rod assembly 104, a pilot valve spring 105, a stop seat 106, a nut 111 and a mounting sleeve;
200. the main valve assembly comprises a main valve assembly 201, a main valve sleeve 202, a main valve core 203, a main valve seat 204, a reset spring 205, an upper cavity 206, an oil inlet cavity 207, an oil outlet cavity 208, a first circulation channel 209, a first connecting hole 210, a first oil outlet hole 211, a first oil inlet hole 212, a second channel 213, a connecting pipe 214, an oil outlet 215, a first oil inlet channel 216, a positioning hole 217, a connecting hole 231, a positioning part 232, a connecting part 233 and a positioning end face;
i, a first oil way, II and a second oil way;
301. the oil storage device comprises an outer cylinder barrel 302, an inner cylinder barrel 303, a working cylinder 304, an oil storage cavity 305, an intermediate cavity 306, a working cavity 307, an adapter sleeve 308, a connecting sleeve 309 and an adapter pipe.
Detailed Description
The invention is further described with reference to the following figures and specific embodiments.
Referring to fig. 1, the semi-active shock absorber in the present embodiment includes an oil cylinder assembly 002, a connecting rod piston assembly 003, a base valve assembly and a digital proportional valve 001; the oil cylinder assembly comprises an outer cylinder barrel 301, an inner cylinder barrel 302 and a working cylinder 303, an oil storage cavity 304 is formed between the inner cylinder barrel 302 and the outer cylinder barrel 301, an intermediate cavity 305 is formed between the inner cylinder barrel 302 and the working cylinder 303, and a working cavity 306 is formed in the working cylinder 303. A connecting rod piston assembly 003 is disposed within the working cylinder 303 and a base valve assembly is disposed at one end of the inner cylinder 302.
As shown in fig. 2, 3 and 4, the digital proportional valve in the present embodiment includes an on-off valve assembly 100 and a main valve assembly 200.
The switching valve assembly 100 is used as a pilot stage of the digital proportional valve and comprises a magnetic conductive yoke iron assembly 101, a coil assembly 102, an armature push rod assembly 103 and a pilot valve spring 104, wherein the armature push rod assembly 103 and the coil assembly 102 are arranged in the magnetic conductive yoke iron assembly 101, the armature push rod assembly 103 is in sliding fit with the magnetic conductive yoke iron assembly 101, the coil assembly 102 is fixedly arranged in the magnetic conductive yoke iron assembly 101 through a nut 106, the coil assembly 102 is sleeved outside the armature push rod assembly 103, and the armature push rod assembly can be pushed to move along the axial direction of the magnetic conductive yoke iron assembly when the coil assembly is electrified; a stop seat 105 is arranged between the armature push rod assembly 103 and the magnetic yoke assembly 101, and a pilot valve spring 104 is arranged between the stop seat 105 and the armature push rod assembly 103 and provides restoring force for the armature push rod assembly to restore to an initial position, namely when the coil assembly is powered off, the electromagnetic acting force of the coil assembly on the armature push rod assembly disappears, and the pilot valve spring pushes the armature push rod assembly to move in a reverse direction to return to the initial position.
A first oil way I and a second oil way II are arranged on the main valve assembly 200, the oil inlet ends of the first oil way I and the second oil way II are respectively communicated with the middle cavity 305, and the oil outlet ends of the first oil way I and the second oil way II are respectively communicated with the oil storage cavity 304. When the coil assembly is not electrified, the first oil way is in a connected state, the second oil way is in a disconnected state, and the intermediate cavity is communicated with the oil storage cavity through the first oil way; when the coil assembly is electrified, the armature push rod assembly blocks the first oil way, the first oil way is in a disconnected state, and the intermediate cavity is communicated with the oil storage cavity through the second oil way.
As shown in fig. 5, the main valve assembly in this embodiment includes a main valve sleeve 201, a main valve element 202, and a main valve seat 203, wherein an upper chamber 205 and a lower chamber are respectively disposed on the main valve sleeve 201, the main valve element 202 is disposed in the lower chamber of the main valve sleeve 201 and is in sliding fit with the lower chamber of the main valve sleeve, the main valve seat 203 is disposed at an end of the lower chamber, a return spring 204 is disposed between the main valve element 202 and the main valve sleeve 201, the return spring 204 applies an acting force to the main valve element to enable an end face of the main valve element and an end face of the main valve seat to be tightly fitted, the main valve seat 203 and the main valve element 202 are disposed in the main valve sleeve 201 and are configured to divide the lower chamber into an oil inlet chamber 206 and an oil outlet chamber 207, an oil outlet 214 is disposed at the oil outlet.
The main valve sleeve 201 is provided with a first circulation channel 208 communicated with an upper cavity and a first communication hole 209 communicated with the upper cavity and a lower cavity, the main valve core 202 is provided with a first oil outlet 210 communicated with an oil inlet cavity and an oil outlet cavity, the main valve seat 203 is provided with a first oil inlet 211 and a second channel 212, the first oil inlet 211 is communicated with the first circulation channel 208, and the main valve core 202 seals the second channel 212 to control the on-off of a second oil path.
Wherein, a first oil inlet hole 211, a first flow channel 208, an upper cavity 205, a first communicating hole 209, an oil inlet cavity 206, a first oil outlet hole 210 and an oil outlet cavity 207 on the main valve assembly are connected in sequence to form a first oil path I; the second passage 212 and the oil outlet cavity are connected to form a second oil path II.
The lower end of a magnetic yoke component 101 of the switch valve assembly 100 is provided with an installation sleeve 111, a main valve assembly is arranged in the installation sleeve 111 in a matching mode, the main valve assembly and the installation sleeve are in interference fit, the main valve assembly is fixedly installed on the switch valve assembly, at the moment, the end face of the main valve sleeve is in sealing fit with the end face of the magnetic yoke component, so that an upper cavity of the main valve sleeve forms a sealed cavity, one end of an armature push rod component 103 of the switch valve assembly extends into the upper cavity 205, and the armature push rod component can control the on-off of a first oil way when moving along the axial direction, so that the on-off control of the first oil way is realized through the on-off control of a coil component, the oil in the digital proportional valve is switched between the first oil way and a second oil way, and the control and the continuous adjustment of the throttling area of.
Referring to fig. 5, 6 and 7, in the present embodiment, the first flow passage 208 is disposed on the main valve housing along an axial direction thereof, the first oil inlet hole 210 is disposed on the main valve seat along the axial direction thereof, a connection pipe 213 is disposed at a connection position between the first oil inlet hole 210 and the first flow passage 208, and two ends of the connection pipe 213 are respectively inserted into the first oil inlet hole 210 and the first flow passage 208 in a fitting manner, so that the first oil inlet hole and the first flow passage are hermetically connected, and the main valve seat and the main valve housing can be effectively positioned. Two first circulation passages 208 are arranged on the main valve sleeve 201, and two first oil inlet holes 211 are correspondingly arranged on the main valve seat 203 in a matched manner, so that the size of the throttling area of the first oil path is increased.
One or more oil outlets 214 are arranged at the lower end of the main valve sleeve 201, and the oil outlets 214 are of U-shaped notch structures arranged along the circumferential direction of the main valve sleeve.
As shown in fig. 8, a first oil inlet passage 215 is provided on an end surface of one end of the main valve seat 203, and one end of the first oil inlet passage 215 is connected to the first oil inlet hole 211 and the other end thereof is communicated with the second passage 212. The first oil inlet channel 215 is an open groove structure horizontally arranged on one end face of the main valve seat.
As shown in fig. 8 and 9, the main valve seat 203 includes a positioning portion 231 and a connecting portion 232, a positioning end surface 233 is formed between the positioning portion 231 and the connecting portion 232, the connecting portion 232 is fittingly inserted into the main valve sleeve 201, an end surface of the main valve sleeve 201 is sealingly fitted with the positioning end surface 233, and the first oil inlet 211 is vertically disposed on the positioning portion 231.
The main valve sleeve 201 is provided with a positioning hole 216, the connecting part 232 of the main valve seat 203 is correspondingly provided with a connecting hole 217 along the radial direction, the main valve seat 203 and the main valve sleeve 201 are connected by arranging a positioning pin in the positioning hole and the connecting hole, the main valve seat is fixedly installed in the main valve sleeve, and the main valve seat and the main valve sleeve are fixedly connected.
As shown in fig. 2, an adapter sleeve 307 is sleeved outside the magnetic yoke assembly 101, the magnetic yoke assembly 101 is in threaded connection with the adapter sleeve 307, a connecting sleeve 308 communicated with the oil storage cavity is arranged on the outer cylinder 301, the digital proportional valve is installed in the connecting sleeve 308 through the adapter sleeve, and the digital proportional valve is fixedly installed on an oil cylinder assembly of the shock absorber. An adapter tube 309 communicated with the middle cavity is arranged on the inner cylinder barrel 302, the main valve seat 203 is arranged at one end of the adapter tube 309, the end face of the main valve seat 203 is in sealing fit with the end face of the adapter tube 309, and the first oil path I and the second oil path II are respectively communicated with the middle cavity 305 through the adapter tube.
The working process of the shock absorber is as follows:
when the shock absorber is stretched, the connecting rod piston assembly moves upwards, the volume of the upper cavity of the working cavity is reduced, and oil in the upper cavity of the working cavity flows into the lower cavity of the working cavity through the recovery valve system; because of the existence of the connecting rod in the upper cavity of the working cavity, the oil flowing into the upper cavity of the working cavity is not enough to fill the increased volume of the lower cavity of the working cavity, and under the action of pressure difference, the oil in the oil storage cavity pushes away a bottom valve plate through a normal through hole of the bottom valve assembly and flows into the lower cavity of the working cavity; at this time, the pressure of the upper chamber of the working chamber is still higher than that of the oil storage chamber, so that the oil in the middle chamber flows into the oil storage chamber through the digital proportional valve.
When the shock absorber is compressed, the connecting rod piston assembly moves downwards, the volume of the lower cavity of the working cavity is reduced, oil in the lower cavity of the working cavity flows into the upper cavity of the working cavity, the increased volume of the upper cavity of the working cavity is smaller than the reduced volume of the lower cavity of the working cavity due to the existence of the connecting rod in the upper cavity of the working cavity, a part of oil pushes a bottom valve plate of the bottom valve assembly to flow into the oil storage cavity, at the moment, the pressure of the upper cavity of the working cavity is still larger than that of the oil storage cavity, and the oil in the middle cavity flows to the oil.
When the digital proportional valve is in a power-off state of the coil assembly, the armature push rod assembly is positioned above the first connecting hole, and the first oil way is in a communicating state; when the coil assembly is electrified, the armature push rod assembly is pushed to move towards the first connecting hole, the first connecting hole is blocked, and the first oil way is blocked. The control and working process is as follows:
when the coil assembly is powered off, the armature push rod assembly is controlled to be separated from the first connecting hole under the action of the pilot valve spring, the first oil way is in a connected state at the moment, the second oil way is in a disconnected state under the action of the return spring and the main valve core, oil flows in the first oil way at the moment, and the flow area of the first oil way is the throttle area of the valve at the moment.
When the coil component is electrified, the input signal is controlled by the controller, when the input PWM signal is at a high level, the coil component generates electromagnetic force to push the armature push rod component to move towards the main valve assembly, the armature push rod component blocks the first connecting hole, and the first oil way is disconnected; at the moment, the oil pressure in the second channel rises, the oil pushes the main valve core away under the action of the pressure, the second oil way is opened, the oil flows through the second oil way, and the flow area of the second oil way is the flow throttling area of the proportional valve. When the input PWM signal is low level, the coil component is not electrified, the electromagnetic force disappears, the armature push rod component is far away from the main valve assembly under the action of the pilot valve spring, at the moment, the first oil way is communicated again, the oil pressure in the second channel is reduced, and the main valve core cuts off the second oil way under the action of the reset spring.
The digital proportional valve is continuously switched between the first oil way and the second oil way by inputting PWM signals to carry out on-off control on the coil assembly and high-frequency switching on high and low levels of the PWM signals, the throttling area of the digital proportional valve can be changed by changing the duty ratio of the PWM signals, the continuous adjustment on the area of the throttling valve is realized, and the connection adjustment and control on the damping force of the shock absorber are realized.
The present specification and figures are to be regarded as illustrative rather than restrictive, and it is intended that all such alterations and modifications that fall within the true spirit and scope of the invention, and that all such modifications and variations are included within the scope of the invention as determined by the appended claims without the use of inventive faculty.
Claims (8)
1. A semi-active shock absorber is characterized by comprising an oil cylinder assembly, a connecting rod piston assembly, a bottom valve assembly and a digital proportional valve;
the oil cylinder assembly comprises an outer cylinder barrel, an inner cylinder barrel and a working cylinder, an oil storage cavity is formed between the inner cylinder barrel and the outer cylinder barrel, an intermediate cavity is formed between the inner cylinder barrel and the working cylinder, and a working cavity is formed in the working cylinder;
the digital proportional valve comprises a switch valve assembly and a main valve assembly;
the switch valve assembly comprises a magnetic yoke iron assembly, a coil assembly, an armature push rod assembly and a pilot valve spring, wherein the armature push rod assembly and the coil assembly are arranged in the magnetic yoke iron assembly, the armature push rod assembly is in sliding fit with the magnetic yoke iron assembly, the coil assembly can push the armature push rod assembly to move along the axial direction of the magnetic yoke iron assembly when being electrified, and the pilot valve spring provides restoring force for the armature push rod assembly to restore to the initial position;
the main valve assembly is provided with a first oil way and a second oil way, the oil inlet ends of the first oil way and the second oil way are respectively communicated with the middle cavity, and the oil outlet ends of the first oil way and the second oil way are respectively communicated with the oil storage cavity;
when the coil assembly is not electrified, the first oil way is in a connected state, the second oil way is in a disconnected state, and the intermediate cavity is communicated with the oil storage cavity through the first oil way; when the coil assembly is electrified, the armature push rod assembly blocks the first oil way, the first oil way is in a disconnected state, and the intermediate cavity is communicated with the oil storage cavity through the second oil way.
2. The semi-active shock absorber according to claim 1, wherein the main valve assembly comprises a main valve sleeve, a main valve core and a main valve seat, the main valve sleeve is provided with an upper chamber and a lower chamber, the main valve core is arranged in the lower chamber of the main valve sleeve and is in sliding fit with the lower chamber of the main valve sleeve, the main valve seat is arranged at the end of the lower chamber, a return spring is arranged between the main valve core and the main valve sleeve, the return spring exerts an acting force on the main valve core to enable one end face of the main valve core to be in close fit with one end face of the main valve seat, the main valve seat and the main valve core are arranged in the main valve sleeve in a matching manner to divide the lower chamber into an oil inlet chamber and an oil outlet chamber, and an oil outlet is;
the main valve sleeve is provided with a first circulation channel communicated with the upper cavity and a first communication hole communicated with the upper cavity and the lower cavity, the main valve core is provided with a first oil outlet hole communicated with the oil inlet cavity and the oil outlet cavity, the main valve seat is provided with a first oil inlet hole and a second channel, the first oil inlet hole is communicated with the first circulation channel, and the main valve core is arranged at one end of the second channel to control the on-off of a second oil path;
the first oil inlet hole, the first flow channel, the upper cavity, the first communicating hole, the oil inlet cavity, the first oil outlet hole and the oil outlet cavity are sequentially connected to form a first oil way; the second channel is connected with the oil outlet cavity to form a second oil path;
the main valve assembly is arranged at the lower end of a magnetic yoke component of the switch valve, so that the upper cavity forms a sealed cavity, one end of the armature push rod component extends into the upper cavity, and the armature push rod component can control the on-off of the first oil path when moving along the axial direction.
3. The semi-active shock absorber of claim 2 wherein the armature push rod assembly is located above the first communication hole, and when the coil assembly is energized, the armature push rod assembly is pushed to move toward the first communication hole to block the first communication hole and block the first oil path.
4. The semi-active shock absorber of claim 2 wherein the oil outlet is one or more U-shaped notches provided at a lower end of the main valve housing.
5. The semi-active shock absorber of claim 2 wherein the main valve seat has a first oil inlet passage disposed on an end surface thereof, the first oil inlet passage having one end connected to the first oil inlet hole and the other end communicating with the second passage.
6. The semi-active shock absorber of claim 5 wherein the first oil inlet passage is an open-ended slot arrangement disposed horizontally on an end face of the main valve seat.
7. The semi-active shock absorber according to claim 2, wherein an adapter sleeve is sleeved outside the magnetic yoke assembly, the magnetic yoke assembly and the adapter sleeve are in threaded connection, a connecting sleeve communicated with the oil storage chamber is arranged on the outer cylinder barrel, and the digital proportional valve is mounted in the connecting sleeve through the adapter sleeve.
8. The semi-active shock absorber according to claim 7, wherein the inner cylinder is provided with an adapter tube communicating with the intermediate chamber, the main valve seat is arranged at one end of the adapter tube, the end face of the main valve seat is in sealing fit with the end face of the adapter tube, and the first oil path and the second oil path are respectively communicated with the intermediate chamber through the adapter tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011155980.4A CN112253669A (en) | 2020-10-26 | 2020-10-26 | Semi-active shock absorber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011155980.4A CN112253669A (en) | 2020-10-26 | 2020-10-26 | Semi-active shock absorber |
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| CN112253669A true CN112253669A (en) | 2021-01-22 |
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| CN202011155980.4A Pending CN112253669A (en) | 2020-10-26 | 2020-10-26 | Semi-active shock absorber |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114294369A (en) * | 2021-12-13 | 2022-04-08 | 浙江戈尔德智能悬架股份有限公司 | Novel external electromagnetic valve assembly and application thereof |
| CN114506196A (en) * | 2022-02-25 | 2022-05-17 | 智己汽车科技有限公司 | Spacing real-time adjustable vehicle suspension and corresponding vehicle |
| CN114542643A (en) * | 2022-03-24 | 2022-05-27 | 姚海洋 | Variable damping force automobile shock absorber |
-
2020
- 2020-10-26 CN CN202011155980.4A patent/CN112253669A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114294369A (en) * | 2021-12-13 | 2022-04-08 | 浙江戈尔德智能悬架股份有限公司 | Novel external electromagnetic valve assembly and application thereof |
| CN114506196A (en) * | 2022-02-25 | 2022-05-17 | 智己汽车科技有限公司 | Spacing real-time adjustable vehicle suspension and corresponding vehicle |
| CN114542643A (en) * | 2022-03-24 | 2022-05-27 | 姚海洋 | Variable damping force automobile shock absorber |
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