CN114877010A - Double-cylinder vehicle shock absorber and using method thereof - Google Patents

Double-cylinder vehicle shock absorber and using method thereof Download PDF

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Publication number
CN114877010A
CN114877010A CN202210502104.7A CN202210502104A CN114877010A CN 114877010 A CN114877010 A CN 114877010A CN 202210502104 A CN202210502104 A CN 202210502104A CN 114877010 A CN114877010 A CN 114877010A
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China
Prior art keywords
oil
shock absorber
cylinder
adjusting
inner cylinder
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Withdrawn
Application number
CN202210502104.7A
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Chinese (zh)
Inventor
刘志强
蒋城杰
臧阿顺
邢乐
邢玉壮
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Changsha University of Science and Technology
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Changsha University of Science and Technology
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Priority to CN202210502104.7A priority Critical patent/CN114877010A/en
Publication of CN114877010A publication Critical patent/CN114877010A/en
Withdrawn legal-status Critical Current

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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
    • F16F13/00—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs
    • F16F13/005—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a wound spring and a damper, e.g. a friction damper
    • F16F13/007—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a wound spring and a damper, e.g. a friction damper the damper being a fluid damper
    • 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
    • F16F9/06—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid
    • F16F9/062—Bi-tubular units
    • 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
    • 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
    • F16F9/42—Cooling arrangements
    • 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
    • F16F9/43—Filling or drainage arrangements, e.g. for supply of gas
    • 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
    • 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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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

The invention belongs to the field of automobile manufacturing, and particularly relates to a double-cylinder vehicle shock absorber and a using method thereof, wherein the double-cylinder vehicle shock absorber comprises the following steps: the inner cylinder comprises a piston rod and an inner cylinder body, the piston rod penetrates through the top of the inner cylinder body and is in contact with the side wall of the inner cylinder body, and the inner cylinder body is divided into an inner cylinder upper oil cavity and an inner cylinder lower oil cavity; the outer cylinder comprises an adjusting piston and an outer cylinder body, and the adjusting piston divides the outer cylinder body into an outer cylinder upper oil cavity and an outer cylinder lower oil cavity; a first oil circulation channel is formed between the outer cylinder upper oil cavity and the inner cylinder upper oil cavity, and a second oil circulation channel is formed between the outer cylinder lower oil cavity and the inner cylinder lower oil cavity; an adjusting channel is arranged between the upper oil cavity of the outer cylinder and the lower oil cavity of the inner cylinder, and the adjusting piston moves up and down to adjust the size of the adjusting channel, so that the cross section area of oil liquid circulation can be adjusted timely when different road conditions are met, and the damping effect is improved.

Description

Double-cylinder vehicle shock absorber and using method thereof
Technical Field
The invention belongs to the field of automobile shock absorption, and particularly relates to a double-cylinder vehicle shock absorber and a using method thereof.
Background
The shock absorber is used for inhibiting the shock generated when the spring rebounds after absorbing shock and the impact from the road surface, is widely applied to automobiles and is used for accelerating the attenuation of the shock of a frame and an automobile body so as to improve the stability of the automobiles; with the continuous development of science and technology, people have higher and higher requirements on the stability, comfort level and safety of automobiles in the traveling process, and the importance of the vehicle shock absorber is more and more prominent.
Most shock absorbers adopted in the existing automobile suspension system are double-acting cylinder type hydraulic shock absorbers, the working principle is that when a frame or an automobile body and an axle vibrate and relative movement occurs, a piston in the shock absorber moves up and down, and hydraulic oil in a shock absorber cavity repeatedly flows into another cavity from one cavity through different pores. At the moment, the friction between the hole wall and the hydraulic oil and the internal friction between hydraulic oil molecules form damping force on vibration, so that the vibration energy of the automobile is converted into the heat energy of the hydraulic oil, and then the heat energy is absorbed by the shock absorber and is dissipated into the atmosphere. The whole shock absorber is more in structural parts, complex in structure and difficult to maintain, and the shock absorber of the vehicle is difficult to adjust in real time according to the road condition in the driving process of the vehicle, so that the vehicle is not comfortable and stable enough in the driving process.
Disclosure of Invention
The invention provides a double-cylinder vehicle shock absorber and a using method thereof.A circulation of oil between inner cylinders, between outer cylinders and between the inner cylinders and the outer cylinders is realized by arranging the inner cylinders, the outer cylinders and all circulation channels and regulation channels; simultaneously, the relative coincidence position of the adjusting piston and the adjusting channel in the outer cylinder is used for changing the oil flow area, so that when different road conditions are faced, the damping effect of the shock absorber can be timely adjusted, and the running stability, comfort and safety of the vehicle are further guaranteed.
A dual-cylinder vehicle shock absorber comprising:
the inner cylinder comprises a piston rod and an inner cylinder body, the piston rod penetrates through the top of the inner cylinder body and is in contact with the side wall of the inner cylinder body, and the inner cylinder body is divided into an inner cylinder upper oil cavity and an inner cylinder lower oil cavity;
the outer cylinder comprises an adjusting piston and an outer cylinder body, and the adjusting piston divides the outer cylinder body into an outer cylinder upper oil cavity and an outer cylinder lower oil cavity; a first oil circulation channel is formed between the outer cylinder upper oil cavity and the inner cylinder upper oil cavity, and a second oil circulation channel is formed between the outer cylinder lower oil cavity and the inner cylinder lower oil cavity; an adjusting channel is formed between the upper oil cavity of the outer cylinder and the lower oil cavity of the inner cylinder, and the adjusting piston moves up and down along with the oil to adjust the size of the adjusting channel.
Oil liquid circulation among the inner cylinders, the outer cylinders and between the inner cylinders and the outer cylinders is realized by arranging the inner cylinders, the outer cylinders and all the circulation channels and the adjusting channels; simultaneously, the relative coincidence position of the adjusting piston and the adjusting channel in the outer cylinder is used for changing the oil flow area, so that when different road conditions are faced, the damping effect of the shock absorber can be timely adjusted, and the running stability, comfort and safety of the vehicle are further guaranteed.
Further, the oil storage cylinder is arranged inside the piston rod; the oil-gas separation piston divides the oil storage cylinder into a gas cylinder and an oil cylinder, and a piston end cover is installed at the end part of the oil storage cylinder; and the piston end cover is provided with a compensating valve and a compression valve, the compensating valve is a pressure valve for one-way communication of the oil cylinder to the oil in the lower oil cavity of the inner cylinder, and the compression valve is a pressure valve for one-way communication of the oil in the lower oil cavity of the inner cylinder to the oil in the oil cylinder.
The oil storage cylinder is arranged inside the piston rod, so that the space is reasonably utilized, and direct oil circulation between the oil storage cylinder and the inner cylinder is realized; through setting up compensating valve and compression valve, adjust the pressure differential between interior jar, outer jar, improve the shock attenuation effect when expanding the shock attenuation scope.
Furthermore, the piston end cover penetrates through the oil storage cylinder through a connecting bolt and is connected with the piston rod, and the piston end cover is used for realizing a guiding effect on the up-and-down movement of the oil-gas separation piston.
Furthermore, a rubber gasket is arranged between the connecting bolt and the piston end cover and used for sealing.
And a rubber gasket is arranged, so that a sealing effect is realized between the bolt and the piston end cover.
Further, the adjusting piston comprises a first steel ring and a second steel ring, and the first steel ring is connected with the second steel ring through a connecting ring; the connecting ring is provided with a plurality of first through grooves corresponding to the adjusting channels, and the first through grooves penetrate through the connecting ring along the radial direction; a plurality of second through grooves which are respectively communicated with the first through grooves are formed in the first steel ring, and the second through grooves penetrate through the first steel ring along the axial direction; and the first steel ring closes the adjusting channel when overlapping with the adjusting channel.
In the upward movement process of the adjusting piston, the first through groove is communicated with the adjusting channel, so that oil liquid circulation of the inner cylinder lower oil cavity and the outer cylinder upper oil cavity is realized; and in the downward moving process of the adjusting piston, the upper oil cavity of the inner cylinder and the upper oil cavity of the outer cylinder are communicated, so that oil liquid circulation is realized.
Furthermore, the upper ends of the outer walls of the inner cylinder body and the outer cylinder body are respectively welded with the upper end cover of the shock absorber; the lower ends of the outer walls of the inner cylinder body and the outer cylinder body are respectively welded with the lower end cover of the shock absorber.
The inner cylinder and the outer cylinder of the shock absorber are protected by arranging the upper end cover of the shock absorber and the lower end cover of the shock absorber.
Furthermore, an adjusting spring is arranged in the lower oil cavity of the outer cylinder, one end of the adjusting spring is connected with the bottom end of the adjusting piston through an adjusting piston spring buckle, and the other end of the adjusting spring is connected with the lower end cover of the shock absorber through an adjusting spring connecting buckle.
Through setting up adjusting spring for adjust the piston and reciprocate the in-process along the outer cylinder and have the cushioning effect with between the bumper shock absorber lower extreme lid, play the guard action.
Furthermore, one end of the piston rod, which is in contact with the external environment, is provided with an upper lifting lug, a spring seat is arranged between the upper lifting lug and the piston rod, and the bottom of the upper lifting lug penetrates through the spring seat and is in threaded fit with the piston rod.
The shock absorber spring is characterized by further comprising a shock absorber spring, wherein one end of the shock absorber spring is connected with the spring seat through a first shock absorber spring connecting buckle; the other end of the damper is connected with the upper end cover of the damper through a spring connecting buckle of the second damper.
The shock absorber springs are respectively arranged on the upper end cover of the shock absorber and below the upper lifting lug, so that the piston rod plays a role in buffering in the movement process.
A method of using the dual cylinder vehicle shock absorber as described above, comprising the steps of:
s1: when the road surface condition is a convex road surface in the running process of the vehicle, the load of the shock absorber is increased, the piston rod is pressed down by force and extends into the shock absorber, the adjusting piston moves upwards to enable the adjusting channel to be communicated, and oil exchange is carried out between the lower oil cavity of the inner cylinder and the upper oil cavity of the outer cylinder through the adjusting channel;
s2: when the road surface condition is a concave road surface in the running process of the vehicle, the load of the shock absorber is reduced, the piston rod moves upwards under the action of the spring and extends out of the interior of the shock absorber, the adjusting piston moves downwards to enable the adjusting channel to be communicated, and oil exchange is carried out between the lower oil cavity of the inner cylinder and the upper oil cavity of the outer cylinder through the adjusting channel.
The invention has the beneficial effects that:
1. based on the spring damping system, the adjusting piston is arranged in the outer cylinder of the shock absorber, the adjusting piston is matched with the adjusting channel to change the relative positions of the adjusting piston and the adjusting channel, so that the cross section area of oil flowing through the adjusting channel is changed, the vehicle can be adjusted in real time according to the current road condition when facing different road conditions, namely, the cross section area of oil flowing through the adjusting channel is automatically adjusted under different relative motion trends between an axle and a frame, the shock absorption effect of the shock absorber is improved, and the stability, the comfort and the safety of the vehicle in the driving process are further improved.
2. In the working process of the shock absorber, the oil in the outer cylinder continuously circulates, so that heat generated in the circulation process of the oil in the inner cylinder and the outer cylinder is easily dissipated to the external environment, the heat of the shock absorber is effectively reduced, and the service life of the shock absorber is prolonged.
3. The double-cylinder type structure is adopted, the oil storage cylinder is arranged inside the piston rod, the space utilization rate is improved, the piston rod is connected with the frame in the using process of the shock absorber, the outer cylinder and the inner cylinder are connected with the wheels, and the shock of the frame is smaller than that of the wheels after the shock absorber absorbs the shock, so that the vehicle is more stable; simultaneously divide into gas cylinder and fluid cylinder with the oil storage jar through the oil gas partition piston, through pouring into low pressure nitrogen gas in the gas cylinder for the density of fluid increases, reduces the bubble, and oil gas production when preventing the high temperature, and then eliminate the foaming phenomenon of shock absorber fluid, can also reduce the driving noise.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic perspective view of the adjustment piston;
FIG. 3 is a schematic top view of the adjustment piston;
FIG. 4 is a schematic structural view of section A-A of FIG. 3;
fig. 5 is a side view of the regulating piston.
Reference numerals:
1. an upper end cover of the shock absorber; 2. the second shock absorber is connected with the buckle through a spring; 3. a seal assembly; 4. the first shock absorber is connected with the buckle through a spring; 5. a spring seat; 6. an upper lifting lug; 7. a damper spring; 8. an upper oil cavity of the inner cylinder; 9. a first oil flow passage; 10. an outer cylinder upper oil chamber; 11. an inner cylinder body; 12. an outer cylinder body; 13. a piston rod; 14. a gas cylinder; 15. an oil-gas separating piston; 16. an oil-liquid cylinder; 17. a compression valve; 18. a piston end cap; 19. a connecting bolt; 20. a rubber gasket; 21. a compensation valve; 22. an inner cylinder lower oil chamber; 23. adjusting the channel; 24. an adjusting piston; 25. adjusting a piston spring buckle; 26. adjusting the spring; 27. the adjusting spring is connected with the buckle; 28. an outer cylinder lower oil chamber; 29. a second oil flow passage; 30. a lower end cover of the shock absorber; 31. a lower lifting lug; 32. a first steel ring; 33. a second steel ring; 34. a connecting ring; 35. a first through groove; 36. a second through slot.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. Furthermore, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
FIG. 1 shows a double-cylinder shock absorber for vehicles, which comprises an inner cylinder, an outer cylinder and an oil storage cylinder, wherein the oil storage cylinder is arranged inside a piston rod 13 to realize oil circulation among the inner cylinder, the outer cylinder, between the inner cylinder and the outer cylinder and between the inner cylinder and the oil storage cylinder; simultaneously, an adjusting piston 24 is arranged in the outer cylinder, an adjusting channel 23 is arranged between the outer cylinder and the inner cylinder, and the oil liquid circulation and the cross-sectional area are changed through the relative coincidence position of the adjusting piston 24 and the adjusting channel 23, so that when the automobile is in the face of different road conditions, the damping effect of the shock absorber can be adjusted in real time, and the running stability, comfort and safety of the automobile are further guaranteed.
Specifically, the inner cylinder comprises a piston rod 13 and an inner cylinder body 11, the piston rod 13 penetrates through the top of the inner cylinder body 11 and is in contact with the side wall of the inner cylinder body 11, and the inner cylinder body 11 is divided into an inner cylinder upper oil cavity 8 and an inner cylinder lower oil cavity 22; the oil pressure in the inner cylinder is changed by the up-and-down movement of the piston rod 13.
Specifically, the outer cylinder includes an adjusting piston 24 and an outer cylinder body 12, the adjusting piston 24 divides the outer cylinder body 12 into an outer cylinder upper oil chamber 10 and an outer cylinder lower oil chamber 28; a first oil circulation channel 9 is formed between the outer cylinder upper oil cavity 10 and the inner cylinder upper oil cavity 8, and a second oil circulation channel 29 is formed between the outer cylinder lower oil cavity 28 and the inner cylinder lower oil cavity 22, so that oil circulation between the inner cylinder upper oil cavity 8 and the outer cylinder upper oil cavity 10 and between the inner cylinder lower oil cavity 22 and the outer cylinder lower oil cavity 28 is realized; an adjusting channel 23 is formed between the outer cylinder upper oil cavity 10 and the inner cylinder lower oil cavity 22, and an adjusting piston 24 moves up and down along with the oil to change the size of the adjusting channel 23, so that the cross-sectional area of the oil flowing through the adjusting channel 23 can be adjusted in real time according to different road conditions, multiple requirements are met, and the damping effect of the damper is improved; meanwhile, an adjusting spring 26 is arranged in the outer cylinder lower oil chamber 28, one end of the adjusting spring is connected with the bottom end of the adjusting piston 24 through an adjusting piston spring buckle 25, and the other end of the adjusting spring is connected with the shock absorber lower end cover 30 through an adjusting spring connecting buckle 27, so that the adjusting piston 24 has a buffering effect with the shock absorber lower end cover 30 in the process of moving up and down along the outer cylinder, and a protection effect is achieved.
As shown in fig. 2 to 5, the adjusting piston 24 includes a first steel ring 32 and a second steel ring 33, and the first steel ring 32 and the second steel ring 33 are connected by a connecting ring 34; the connecting ring 34 is provided with a plurality of first through grooves 35 corresponding to the adjusting channels 23, and the first through grooves 35 penetrate through the connecting ring 34 along the radial direction; the first steel ring 32 is provided with a plurality of second through grooves 36 communicated with the first through grooves 35, and the second through grooves 36 penetrate through the first steel ring 32 along the axial direction; the first steel ring 32 closes the regulating channel 23 when overlapping the regulating channel 23; meanwhile, when the adjusting piston 24 moves upwards, the first through groove 35 is communicated with the adjusting channel 23, so that oil liquid circulation of the inner cylinder lower oil chamber 22 and the outer cylinder upper oil chamber 10 is realized; when the adjusting piston 24 moves downwards, the inner cylinder upper oil chamber 8 and the outer cylinder upper oil chamber 10 are communicated, and oil liquid circulation is further realized.
In the present exemplary embodiment, the adjusting piston 24 is in a rest position when the adjusting spring 26 is in a naturally relaxed state, in which case the first steel ring 32 of the adjusting piston 24 closes the adjusting channel 23.
Specifically, the reserve tube is disposed inside the piston rod 13; the oil-gas separation device comprises an oil-gas separation piston 15, wherein an oil storage cylinder is divided into a gas cylinder 14 and an oil cylinder 16 by the oil-gas separation piston 15, and a piston end cover 18 is arranged at the end part of the oil storage cylinder; the piston end cover 18 is provided with a compensating valve 21 and a compression valve 17, the compensating valve 21 is a pressure valve for one-way conduction of oil from the oil cylinder 16 to the inner cylinder lower oil chamber 22, the compression valve 17 is a pressure valve for one-way conduction of the inner cylinder lower oil chamber 22 to the oil of the oil cylinder 16, and the pressure difference generated in the oil circulation process of the inner cylinder and the outer cylinder is adjusted through the compensating valve 21 and the compression valve 17, so that the damping range can be effectively expanded, and the damping effect is improved; the piston end cover 18 penetrates through the oil storage cylinder through a connecting bolt 19 and is connected with the piston rod 13 to achieve a guiding effect on the up-and-down movement of the oil-gas separation piston 15; and a rubber gasket 20 is arranged between the connecting bolt 19 and the piston end cover 18 to play a role of sealing.
In the present embodiment, in the initial state, the compression valve 17 and the compensation valve 21 are in the closed state.
In the embodiment, the upper ends of the outer walls of the inner cylinder body 11 and the outer cylinder body 12 are respectively welded with the upper end cover 1 of the shock absorber; the lower ends of the outer walls of the inner cylinder body 11 and the outer cylinder body 12 are respectively welded with the lower end cover 30 of the shock absorber, so that the inner cylinder and the outer cylinder of the shock absorber are protected.
In the embodiment, an upper lifting lug 6 is arranged at one end of the piston rod 13, which is in contact with the external environment, a spring seat 5 is arranged between the upper lifting lug 6 and the piston rod 13, and the bottom of the upper lifting lug 6 penetrates through the spring seat 5 and is in threaded fit with the piston rod 13; the joint of the piston rod 13 and the upper end cover 1 of the shock absorber is sealed by a sealing component 3, and air is prevented from entering.
Specifically, the shock absorber spring device further comprises a shock absorber spring 7, one end of which is connected with the spring seat 5 through a first shock absorber spring connecting buckle 4; the other end of the damper is connected with the upper end cover 1 of the damper through the spring connecting buckle 2 of the second damper, so that the piston rod 13 plays a role in buffering in the movement process and provides upward spring acting force for the piston rod 13.
In the present embodiment, the lower lug 31 is welded to the lower end cap 30 of the shock absorber.
In the present embodiment, the inner cylinder upper oil chamber 8, the inner cylinder lower oil chamber 22, the outer cylinder upper oil chamber 10, the outer cylinder lower oil chamber 28, and the oil cylinder 16 are filled with oil, and the gas cylinder 14 is filled with low-pressure nitrogen gas, so as to eliminate the foaming phenomenon of the shock absorber oil and reduce the running noise.
A method of using the dual cylinder vehicle shock absorber as described above, comprising the steps of:
s1: when the road surface condition is a convex road surface in the running process of the vehicle, the load of the shock absorber is increased, the piston rod 13 is pressed downwards under the stress and extends into the shock absorber, the adjusting piston 24 moves upwards to enable the adjusting channel 23 to be communicated, and oil exchange is carried out between the inner cylinder lower oil cavity 22 and the outer cylinder upper oil cavity 10 through the adjusting channel 23;
s2: when the road surface condition is a concave road surface in the running process of the vehicle, the load of the shock absorber is reduced, the piston rod 13 moves upwards under the action of the spring and extends out of the interior of the shock absorber, the adjusting piston 24 moves downwards to enable the adjusting channel 23 to be communicated, and oil exchange is carried out between the inner cylinder lower oil cavity 22 and the outer cylinder upper oil cavity 10 through the adjusting channel 23.
Specifically, the working principle comprises:
in an initial state, namely when the road condition of a vehicle is stable, the oil pressure in the inner cylinder upper oil chamber 8, the inner cylinder lower oil chamber 22, the outer cylinder upper oil chamber 10, the outer cylinder lower oil chamber 28 and the oil cylinder 16 is equal, the adjusting spring 26 in the outer cylinder is in a natural relaxation state, at the moment, the adjusting piston 24 is in a balance position, and the first steel ring 32 of the adjusting piston 24 just completely blocks the adjusting channel 23; the compression valve 17 and the compensation valve 21 are both in a closed state.
When the vehicle runs on a convex road surface, the load of the vehicle shock absorber is increased. At this time, the piston rod 13 is pressed down by force, and the damper outer damper spring 7 is compressed therewith; in the interior of the shock absorber, a piston rod 13 enters an inner cylinder inwards, the volume in the inner cylinder is reduced, so that the oil pressure of an upper oil cavity 8 of the inner cylinder is reduced, the oil pressure of a lower oil cavity 22 of the inner cylinder is increased, at the moment, the oil pressure of the upper oil cavity 8 of the inner cylinder is smaller than the oil pressure of the lower oil cavity 22 of the inner cylinder, the oil pressure of the upper oil cavity 8 of the inner cylinder is smaller than the oil pressure of an upper oil cavity 10 of an outer cylinder, and the oil pressure of the lower oil cavity 22 of the inner cylinder is larger than the oil pressure of a lower oil cavity 28 of the outer cylinder; oil in the outer cylinder upper oil chamber 10 flows into the inner cylinder upper oil chamber 8 through the first oil flow passage 9, so that the oil pressure of the outer cylinder upper oil chamber 10 is reduced; the oil of the inner cylinder lower oil chamber 22 flows into the outer cylinder lower oil chamber 28 through the second oil flow passage 29, so that the oil pressure of the outer cylinder lower oil chamber 28 is increased; at the moment, the oil pressure of the outer cylinder upper oil chamber 10 is smaller than the oil pressure of the outer cylinder lower oil chamber 28, under the pressure difference between the outer cylinder upper oil chamber 10 and the outer cylinder lower oil chamber 28, the adjusting piston 24 in the outer cylinder moves upwards, the adjusting spring 26 in the outer cylinder lower oil chamber 28 stretches, the first through groove 35 on the adjusting piston 24 is communicated with the adjusting channel 23, the inner cylinder lower oil chamber 22 is communicated with the outer cylinder upper oil chamber 10, the adjusting channel 23 is opened upwards, the opening degree of the adjusting channel 23 is increased when the pressure difference is increased, oil in the inner cylinder lower oil chamber 22 flows into the outer cylinder upper oil chamber 10 through the adjusting channel 23, then flows into the inner cylinder upper oil chamber 8 through the first oil circulation channel 9, oil exchange is carried out by increasing the adjusting channel 23, and vibration energy is further consumed; meanwhile, when the piston rod 13 enters into the inner cylinder more, the oil pressure in the lower oil chamber 22 of the inner cylinder is larger than the oil pressure of the oil cylinder 16, the compression valve 17 on the piston end cover 18 is opened, the oil in the lower oil chamber 22 of the inner cylinder flows into the oil cylinder 16 through the compression valve 17, the oil-gas separating piston 15 moves upwards, and the gas cylinder 14 is compressed.
When the vehicle encounters a concave road surface in the running process, the load of the vehicle shock absorber is reduced. At this time, the damper outer damper spring 7 generates a spring force, and the piston rod 13 moves upward under the spring force; in the interior of the shock absorber, a piston rod 13 extends out of an inner cylinder, the volume in the inner cylinder is increased, so that the oil pressure of an upper oil chamber 8 of the inner cylinder is increased, the oil pressure of a lower oil chamber 22 of the inner cylinder is reduced, at the moment, the oil pressure of the upper oil chamber 8 of the inner cylinder is greater than the oil pressure of the lower oil chamber 22 of the inner cylinder, the oil pressure of the upper oil chamber 8 of the inner cylinder is greater than the oil pressure of an upper oil chamber 10 of the outer cylinder, and the oil pressure of the lower oil chamber 22 of the inner cylinder is less than the oil pressure of a lower oil chamber 28 of the outer cylinder; oil in the inner upper oil chamber 8 flows into the outer upper oil chamber 10 through the first oil flow passage 9, so that the oil pressure of the outer upper oil chamber 10 is increased; the oil of the outer-cylinder lower oil chamber 28 flows into the inner-cylinder lower oil chamber 22 through the second oil flow passage 29, so that the oil pressure of the outer-cylinder lower oil chamber 28 is reduced; at the moment, the oil pressure of the upper oil chamber 10 of the outer cylinder is greater than the oil pressure of the lower oil chamber 28 of the outer cylinder, under the pressure difference between the upper oil chamber 10 of the outer cylinder and the lower oil chamber 28 of the outer cylinder, the adjusting piston 24 in the outer cylinder moves downwards, the adjusting spring 26 in the lower oil chamber 28 of the outer cylinder compresses, the lower oil chamber 22 of the inner cylinder is directly communicated with the upper oil chamber 10 of the outer cylinder, the adjusting channel 23 opens downwards, the opening degree of the adjusting channel 23 is larger when the pressure difference is larger, oil in the upper oil chamber 8 of the inner cylinder flows into the upper oil chamber 10 of the outer cylinder through the first oil flow channel 9 and then flows into the lower oil chamber 22 of the inner cylinder through the adjusting channel 23, and the oil exchange is carried out by adding the adjusting channel 23, so that the vibration energy is further consumed; meanwhile, when the piston rod 13 extends outwards into the inner cylinder, the oil pressure in the lower oil chamber 22 of the inner cylinder is lower than the oil pressure of the oil cylinder 16, the compensation valve 21 on the piston end cover 18 is opened, the oil in the oil cylinder 16 flows into the lower oil chamber 22 of the inner cylinder through the compensation valve 21, the oil-gas separation piston 15 moves downwards, and the gas cylinder 14 is released.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (10)

1. A dual cylinder vehicle shock absorber, comprising:
the inner cylinder comprises a piston rod (13) and an inner cylinder body (11), wherein the piston rod (13) penetrates through the top of the inner cylinder body (11) and is in contact with the side wall of the inner cylinder body (11), and the inner cylinder body (11) is divided into an inner cylinder upper oil cavity (8) and an inner cylinder lower oil cavity (22);
the outer cylinder comprises an adjusting piston (24) and an outer cylinder body (12), and the adjusting piston (24) divides the outer cylinder body (12) into an outer cylinder upper oil cavity (10) and an outer cylinder lower oil cavity (28); a first oil circulation channel (9) is formed between the outer cylinder upper oil cavity (10) and the inner cylinder upper oil cavity (8), and a second oil circulation channel (29) is formed between the outer cylinder lower oil cavity (28) and the inner cylinder lower oil cavity (22); an adjusting channel (23) is formed between the outer cylinder upper oil cavity (10) and the inner cylinder lower oil cavity (22), and the adjusting piston (24) moves up and down along with the circulation of oil to adjust the size of the adjusting channel (23).
2. The dual cylinder vehicle shock absorber of claim 1, wherein: the oil storage cylinder is arranged inside the piston rod (13); the oil-gas separation device comprises an oil-gas separation piston (15), wherein the oil-gas separation piston (15) divides the oil storage cylinder into a gas cylinder (14) and an oil cylinder (16), and a piston end cover (18) is installed at the end part of the oil storage cylinder; the piston end cover (18) is provided with a compensating valve (21) and a compression valve (17), the compensating valve (21) is a pressure valve for one-way conduction of oil in the oil cylinder (16) to the oil cavity (22) under the inner cylinder, and the compression valve (17) is a pressure valve for one-way conduction of the oil in the oil cavity (22) under the inner cylinder to the oil in the oil cylinder (16).
3. The dual cylinder vehicle shock absorber of claim 2, wherein: and the piston end cover (18) penetrates through the oil storage cylinder through a connecting bolt (19) and is connected with the piston rod (13) and used for realizing a guiding effect on the up-and-down movement of the oil-gas separation piston (15).
4. The dual cylinder vehicle shock absorber of claim 3, wherein: and a rubber gasket (20) is arranged between the connecting bolt (19) and the piston end cover (18) for sealing.
5. The dual cylinder vehicle shock absorber of claim 1, wherein: the adjusting piston (24) comprises a first steel ring (32) and a second steel ring (33), and the first steel ring (32) is connected with the second steel ring (33) through a connecting ring (34); a plurality of first through grooves (35) corresponding to the adjusting channels (23) are formed in the connecting ring (34), and the first through grooves (35) penetrate through the connecting ring (34) in the radial direction; a plurality of second through grooves (36) which are respectively communicated with the first through grooves (35) are formed in the first steel ring (32), and the second through grooves (36) penetrate through the first steel ring (32) along the axial direction; the first steel ring (32) closes the regulating channel (23) when overlapping the regulating channel (23).
6. The dual cylinder vehicle shock absorber of claim 1, wherein: the upper ends of the outer walls of the inner cylinder body (11) and the outer cylinder body (12) are respectively welded with an upper end cover (1) of the shock absorber; the lower ends of the outer walls of the inner cylinder body (11) and the outer cylinder body (12) are respectively welded with a lower end cover (30) of the shock absorber.
7. The dual cylinder vehicle shock absorber of claim 6, wherein: an adjusting spring (26) is arranged in the outer cylinder lower oil cavity (28), one end of the adjusting spring is connected with the bottom end of the adjusting piston (24) through an adjusting piston spring buckle (25), and the other end of the adjusting spring is connected with a shock absorber lower end cover (30) through an adjusting spring connecting buckle (27).
8. The dual cylinder vehicle shock absorber of claim 1, wherein: one end of the piston rod (13) contacting with the external environment is provided with an upper lifting lug (6), a spring seat (5) is arranged between the upper lifting lug (6) and the piston rod (13), and the bottom of the upper lifting lug (6) penetrates through the spring seat (5) and is in threaded fit with the piston rod (13).
9. The dual cylinder vehicle shock absorber of claim 6, wherein: the shock absorber is characterized by also comprising a shock absorber spring (7), wherein one end of the shock absorber spring (7) is connected with the spring seat (5) through a first shock absorber spring connecting buckle (4); the other end of the damper is connected with an upper end cover (1) of the damper through a second damper spring connecting buckle (2).
10. A method of using the dual cylinder vehicle shock absorber of claim 1, comprising the steps of:
s1: when the road surface condition is a convex road surface in the running process of the vehicle, the load of the shock absorber is increased, the piston rod (13) is pressed downwards under the stress and extends into the shock absorber, the adjusting piston (24) moves upwards to enable the adjusting channel (23) to be communicated, and oil exchange is carried out between the lower oil cavity (22) of the inner cylinder and the upper oil cavity (10) of the outer cylinder through the adjusting channel (23);
s2: when the road surface condition is a concave road surface in the running process of the vehicle, the load of the shock absorber is reduced, the piston rod (13) moves upwards under the action of the spring and extends out of the interior of the shock absorber, the adjusting piston (24) moves downwards to enable the adjusting channel (23) to be communicated, and oil exchange is carried out between the lower oil cavity (22) of the inner cylinder and the upper oil cavity (10) of the outer cylinder through the adjusting channel (23).
CN202210502104.7A 2022-05-10 2022-05-10 Double-cylinder vehicle shock absorber and using method thereof Withdrawn CN114877010A (en)

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Application Number Priority Date Filing Date Title
CN202210502104.7A CN114877010A (en) 2022-05-10 2022-05-10 Double-cylinder vehicle shock absorber and using method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116336123A (en) * 2023-05-19 2023-06-27 佑嘉欣液压科技(东台)有限公司 Hydraulic damping device for high-speed train

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116336123A (en) * 2023-05-19 2023-06-27 佑嘉欣液压科技(东台)有限公司 Hydraulic damping device for high-speed train
CN116336123B (en) * 2023-05-19 2023-11-14 佑嘉欣液压科技(东台)有限公司 Hydraulic damping device for high-speed train

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Application publication date: 20220809