CN114233789A - Gas-liquid damping device - Google Patents

Gas-liquid damping device Download PDF

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Publication number
CN114233789A
CN114233789A CN202111624325.3A CN202111624325A CN114233789A CN 114233789 A CN114233789 A CN 114233789A CN 202111624325 A CN202111624325 A CN 202111624325A CN 114233789 A CN114233789 A CN 114233789A
Authority
CN
China
Prior art keywords
cylinder body
piston
valve
inner cylinder
sealing ring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202111624325.3A
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Chinese (zh)
Inventor
黄海帆
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wenzhou Yinuoweite Technology Co ltd
Original Assignee
Wenzhou Yinuoweite Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wenzhou Yinuoweite Technology Co ltd filed Critical Wenzhou Yinuoweite Technology Co ltd
Priority to CN202111624325.3A priority Critical patent/CN114233789A/en
Publication of CN114233789A publication Critical patent/CN114233789A/en
Pending 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
    • 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
    • F16F9/06—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid
    • F16F9/066—Units characterised by the partition, baffle or like element
    • F16F9/067—Partitions of the piston type, e.g. sliding pistons
    • 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
    • F16F9/068—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid where the throttling of a gas flow provides damping action
    • 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
    • F16F9/3207—Constructional features
    • F16F9/3214—Constructional features of pistons
    • 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
    • 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
    • F16F9/36—Special sealings, including sealings or guides for piston-rods
    • F16F9/368—Sealings in pistons
    • 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
    • F16F9/58—Stroke limiting stops, e.g. arranged on the piston rod outside the cylinder
    • F16F9/585—Stroke limiting stops, e.g. arranged on the piston rod outside the cylinder within the cylinder, in contact with working fluid

Abstract

The invention discloses a gas-liquid damping device, which comprises an outer cylinder body and an inner cylinder body, wherein the inner cylinder body is arranged in the outer cylinder body, an inner piston is arranged in the inner cylinder body in a matching way, a piston rod and a damping valve which penetrate through the top parts of the inner cylinder body and the outer cylinder body are arranged on the inner piston, and the bottom part of the inner cylinder body is not sealed; an outer piston capable of moving up and down along the outer wall of the inner cylinder body is arranged between the lower portion of the inner cylinder body and the outer cylinder body, and a fixing portion is arranged in the outer cylinder body and close to the upper portion of the inner cylinder body. The invention aims to provide a shock absorber which is of a gas-liquid combined shock absorption structure.

Description

Gas-liquid damping device
Technical Field
The invention belongs to the technical field of vehicle damping equipment, and particularly relates to a gas-liquid damping device.
Background
The shock absorber is used for inhibiting the shock when the spring absorbs the shock and rebounds and the impact from the road surface. The damping device is widely applied to automobiles and is used for accelerating the attenuation of the vibration of a frame and an automobile body so as to improve the driving smoothness of the automobiles. When the shock absorber passes through the uneven road surface, although the shock absorbing spring can filter the shock of the road surface, the spring can still reciprocate, and the shock absorber is used for inhibiting the spring from jumping.
The existing common shock absorber has many problems, for example, the single-stage shock absorber has poor shock absorption effect, the multi-stage shock absorber has too large friction force in the aspect of matching of a piston and a cylinder, or the shock absorber rebounds fast when the shock absorption is not in time in the shock absorption process, and the like, so the existing shock absorber needs to be improved.
Disclosure of Invention
The invention aims to provide a shock absorber which is of a gas-liquid combined shock absorption structure.
In order to solve the technical problems, the invention adopts the technical scheme that:
the shock absorber comprises an outer cylinder body and an inner cylinder body, wherein the inner cylinder body is arranged in the outer cylinder body, an inner piston is arranged in the inner cylinder body in a matched mode, a piston rod and a damping valve which penetrate through the top of the inner cylinder body and the top of the outer cylinder body are arranged on the inner piston, and the bottom of the inner cylinder body is not closed; an outer piston capable of moving up and down along the outer wall of the inner cylinder body is arranged between the lower part of the inner cylinder body and the outer cylinder body, and a fixing part is arranged in the outer cylinder body and close to the upper part of the inner cylinder body; a sliding body is arranged between the fixing part and the outer piston, an outer liquid cavity is formed between the sliding body and the outer piston, between the sliding body and the inner cylinder body, an outer gas cavity is formed between the sliding body and the fixing part, a separation plug (5) is arranged between the inner piston and the top of the inner cylinder body, the position of the separation plug is fixed relative to the inner cylinder body, an inner gas cavity communicated with the outer gas cavity through a damping valve is formed between the separation plug and the top of the inner cylinder body, an inner liquid cavity is formed between the separation plug and the inner piston, and a hydraulic cavity is formed between the lower part of the inner piston and the outer cylinder body.
Among the above-mentioned technical scheme, outer fluid cavity passes through the interior fluid cavity of pressure switch valve intercommunication, and interior fluid cavity passes through one-way damping valve intercommunication outer fluid cavity.
Among the above-mentioned technical scheme, the pressure switch valve includes the valve body, and the upper portion of valve body is equipped with circular shape fluid inlet, and the fluid inlet upper portion of valve body is equipped with circular shape disk seat, is equipped with the columniform case in the valve body, and the outer face of cylinder of case and the sealed cooperation of valve body inner wall are equipped with circular shape and can seal complex valve plate with the disk seat on case upper portion, be equipped with eccentric axis of rotation on the valve plate, still be equipped with the compression elastomer in the case, the top of compression elastomer is the structure that reduces gradually, and the axis of rotation cooperation is installed at the top of compression elastomer, and the both sides of compression elastomer are equipped with the valve body runner.
In the technical scheme, the lower part of the periphery of the inner cylinder body is provided with a baffle ring for limiting the moving position of the outer piston, and the outer piston is annular.
In the above technical scheme, the outer piston comprises an annular piston body arranged between the inner cylinder body and the outer cylinder body, at least one side of the piston body is provided with an extension part, the extension part is provided with a guide ring in a matching manner, and the inner ring section surface and the outer ring section surface of the piston body are sequentially provided with a first sealing ring, a second sealing ring and a third sealing ring from bottom to top.
In the technical scheme, the first sealing ring and the wall needing to be sealed are in contact sealing; the second sealing ring is arranged in a state of forming a gap with the wall or just contacting with the wall, the second sealing ring is made of elastic materials and comprises an elastic sealing part, the elastic sealing part is provided with a telescopic part close to the piston body side, the telescopic part is provided with a fixing part close to the piston body side, and the telescopic part, the elastic sealing part and the fixing part form an air bag; the piston body is provided with at least one channel for communicating the air bag formed by the telescopic part, the elastic sealing part and the fixing part with the hydraulic cavity, the channel is provided with a pressure valve, and the channel communicates the telescopic part, the elastic sealing part and the fixing part with the air bag.
In the above technical scheme, at least one oil passage communicated to the hydraulic chamber is arranged on the piston body between the first sealing ring and the second sealing ring, and a check valve capable of limiting a medium from flowing from the hydraulic chamber to a position between the first sealing ring and the second sealing ring is arranged on the oil passage.
In the above technical solution, the third sealing ring is in contact and sealed with the sealing surface.
After adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects:
the shock absorber comprises an inner cylinder body and an outer cylinder body, wherein the inner cylinder body and the outer cylinder body comprise gas cavities and hydraulic cavities, so that the whole structure is lighter, and the shock absorption of the whole shock absorber is better due to the characteristics of gas;
the outer piston and the sliding body can be set to have similar structures, so that the outer piston and the sub-sliding body can be changed according to the pressure change of liquid and the pressure/friction force between wall surfaces forming sealing, and the flexibility of the movement of the outer piston and the sliding body is improved.
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention to its proper form. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
FIG. 1 is a schematic view of the overall structure of the shock absorber;
FIG. 2 is a schematic structural view of a pressure switching valve;
FIG. 3 is a schematic structural view of an outer piston sealing structure;
fig. 4 is an enlarged view of a in fig. 3.
It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "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.
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; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The shock absorber shown in fig. 1 to 4 includes:
the cylinder comprises an outer cylinder body 1 and an inner cylinder body 2, wherein the inner cylinder body 2 is arranged in the outer cylinder body 1, an inner piston 3 is arranged in the inner cylinder body 2 in a matched mode, a piston rod 11 and a damping valve 13 which penetrate through the inner cylinder body 2 and the top of the outer cylinder body 1 are arranged on the inner piston, and the bottom of the inner cylinder body 2 is not closed; an outer piston 4 which can move up and down along the outer wall of the inner cylinder body 2 is arranged between the lower part of the inner cylinder body 2 and the outer cylinder body 1, and a fixing part 7 is arranged in the outer cylinder body 1 and close to the upper part of the inner cylinder body 2; a sliding body 30 is arranged between the fixing part 7 and the outer piston 4, an outer liquid cavity 8 is formed between the sliding body 30 and the outer piston 4, the inner cylinder body 2 and the outer cylinder body 1, an outer gas cavity 14 is formed between the sliding body 30 and the fixing part 7, a separating plug 5 fixed relative to the inner cylinder body 2 is arranged between the inner piston 3 and the top of the inner cylinder body 2, an inner gas cavity 9 communicated with the outer gas cavity 14 through a damping valve is formed between the separating plug 5 and the top of the inner cylinder body 2, an inner liquid cavity 20 is formed between the separating plug 5 and the inner piston 3, a hydraulic cavity 10 is formed between the lower part of the inner piston 3 and the outer cylinder body 1, the liquid cavity is filled with oil, and gas with set pressure is filled into the gas cavity and can be inert gas; the sealing structure of the sealing surface of the sliding body 30 and the outer piston 4 can be set to be the same or basically the same, and the size is set according to the requirement.
The component structure for the shock absorber is that the outer liquid cavity 8 is communicated with the inner liquid cavity 20 through the pressure switch valve 12, and the inner liquid cavity 20 is communicated with the outer liquid cavity 8 through the one-way damping valve 15.
The pressure switch valve 12 includes a valve body 121, a circular fluid inlet a is disposed at the upper portion of the valve body 121, a circular valve seat 122 is disposed at the upper portion of the fluid inlet a of the valve body 121, a cylindrical valve core 125 is disposed in the valve body 121, an outer cylindrical surface of the valve core 125 is in sealing fit with an inner wall of the valve body 121, a valve plate 123 which is circular and can be in sealing fit with the valve seat is disposed at the upper portion of the valve core 125, an eccentric rotating shaft 128 is disposed on the valve plate, a compression elastic body 124 is further disposed in the valve core 125, the top of the compression elastic body 124 is of a gradually decreasing structure, the rotating shaft 128 is mounted at the top of the compression elastic body 124 in a matching manner, valve body flow passages 126 are disposed at two sides of the compression elastic body 124, the compression elastic body 124 can be a compression spring, so that after a certain pressure is applied to the valve plate 123, the valve plate 123 is compressed downward to open the valve, the valve plate 123 rotates, and a flow passage disposed in the valve core 125 can allow a medium to flow therethrough, the pressure switch valve 12 has simple structure, compact structure, small volume and high reliability; damping may also be provided within the valve body flow passage 126 to control the rate of flow of the media.
The component structure for the shock absorber is that the lower part of the periphery of the inner cylinder 2 is provided with a baffle ring 17 for limiting the moving position of the outer piston 4, and the outer piston 4 is annular.
The structure of the part for the shock absorber is that the outer piston 4 comprises an annular piston body 41 arranged between an inner cylinder body and an outer cylinder body, at least one side of the piston body 41 is provided with an extension part 42, the extension part 42 is provided with a guide ring 43 in a matching way, and an inner ring section surface 50 and an outer ring section surface 51 of the piston body 41 are sequentially provided with a first sealing ring 44, a second sealing ring 45 and a third sealing ring 48 from bottom to top, namely from the oil side to the air side.
The first sealing ring 44 is in contact sealing with the wall to be sealed (inner cylinder outer wall or outer cylinder inner wall); the second sealing ring 45 is arranged to form a gap or be just contacted with the wall, the second sealing ring 45 is made of elastic materials, the second sealing ring 45 comprises an elastic sealing part 451, an expansion part 452 is arranged on the side, close to the piston, of the elastic sealing part 451, a fixing part 453 is arranged on the side, close to the piston, of the expansion part 452, and the expansion part 452, the elastic sealing part 451 and the fixing part 453 form an air bag; the piston body 41 is provided with at least one passage 50 for communicating the air bag formed by the expansion part 452, the elastic sealing part 451 and the fixing part 453 with the hydraulic chamber 10, the passage 50 is provided with a pressure valve 46, the passage 50 is communicated with the expansion part 452, the elastic sealing part 451 and the fixing part 453 to form a bag body, after the hydraulic chamber 10 reaches the set pressure, the pressure valve 46 is opened, and the hydraulic pressure causes the bellows portion 452 to extend, thereby allowing the elastic sealing part 451 to form a seal between the elastic sealing part 451 and the sealing surface, the fixing portion 453 is mainly used to seal with the wall of the piston body 41, the fixing portion 453 and the expansion portion 452 may be controlled by setting the material or thickness thereof, and the seal between the fixing part 453 and the piston body 41 is provided with a structure such as a seal line, and the seal of the structure can improve the sealing effect and adjust the sealing pressure of the surface in sealing contact according to the pressure of the medium to be sealed;
in addition, at least one oil channel 5b communicated with the hydraulic cavity 10 is arranged on the piston body 41 between the first sealing ring 44 and the second sealing ring 45, a one-way valve 47 capable of limiting the medium to flow from the hydraulic cavity 10 to a position between the first sealing ring 44 and the second sealing ring 45 is arranged on the oil channel 5b, and the third sealing ring 48 is in contact sealing arrangement with the sealing surface, so that when the hydraulic pressure of the medium is too large, part of the medium flows into a position between the first sealing ring 44 and the second sealing ring 45 or/and the third sealing ring 46, the pressure of the sealing medium between the first sealing ring 44 and the second sealing ring 45 or/and the third sealing ring 46 is larger, and when the pressure of the medium in the hydraulic cavity 10 is reduced and increased back and forth, the pressure of the medium between the first sealing ring 44 and the second sealing ring 45 or/and the third sealing ring 46 enters the hydraulic cavity when the pressure of the medium in the hydraulic cavity 10 is larger. When the shock absorber is pressurized, the piston rod 11 moves downwards, liquid in the hydraulic cavity 10 flows back to the inner liquid cavity 20 through the damping valve 13, the outer piston 4 is pushed to move upwards, the pressure in the outer liquid cavity 8 is increased, the sliding body 30 is pushed to move upwards, gas in the outer gas cavity 14 and the inner gas cavity 9 is compressed, and meanwhile, the flowing space of oil is adjusted; under the pressure action of the compressed gas, the higher the pressure of the rear section is, when the pressure reaches or exceeds the pressure set by the pressure switch valve 12, the liquid can also flow into the inner liquid cavity 20, and the speed of compression is increased; when the shock absorber receives a pulling force, the piston rod 11 moves upwards, oil in the inner liquid cavity 20 can flow into the hydraulic cavity 10 and the outer liquid cavity 8, the outer piston 4 is pushed to move downwards, gas in the inner gas cavity 9 flows into the outer gas cavity 14, and the piston rod moves upwards according to a set rebound speed due to the action of the damping valve.
Therefore, the invention comprises the structure of the inner cylinder body 2 and the outer cylinder body 1, the inner cylinder body 2 and the outer cylinder body comprise a gas cavity and a hydraulic cavity, so that the whole structure is lighter, and the whole shock absorber has better shock absorption due to the characteristics of gas; the outer piston 4 and the separating plug 3 can be set to have similar structures, so that the outer piston 4 and the separating plug 3 can be changed according to the pressure change of liquid and the pressure/friction force between wall surfaces forming sealing, and the flexibility of the movement of the outer piston 4 and the sliding body 30 is improved; and can provide a multi-stage shock absorbing effect.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (8)

1. A gas-liquid damping device is characterized by comprising an outer cylinder body (1) and an inner cylinder body (2), wherein the inner cylinder body (2) is arranged in the outer cylinder body (1), an inner piston (3) is installed in the inner cylinder body (2) in a matching manner, a piston rod (11) and a damping valve (13) which penetrate through the inner cylinder body (2) and the top of the outer cylinder body (1) are arranged on the inner piston, and the bottom of the inner cylinder body (2) is not closed; an outer piston (4) capable of moving up and down along the outer wall of the inner cylinder body (2) is arranged between the lower part of the inner cylinder body (2) and the outer cylinder body (1), and a fixing part (7) is arranged in the outer cylinder body (1) and close to the upper part of the inner cylinder body (2); a sliding body (30) is arranged between the fixing portion (7) and the outer piston (4), an outer liquid cavity (8) is formed between the sliding body (30) and the outer piston (4), the inner cylinder body (2) and the outer cylinder body (1), an outer gas cavity (14) is formed between the sliding body (30) and the fixing portion (7), a separating plug (5) is arranged between the top of the inner piston (3) and the top of the inner cylinder body (2) and is fixed relative to the inner cylinder body (2), an inner gas cavity (9) communicated with the outer gas cavity (14) through a damping valve is formed between the separating plug (5) and the top of the inner cylinder body (2), an inner liquid cavity (20) is formed between the separating plug (5) and the inner piston (3), and a hydraulic cavity (10) is formed between the lower portion of the inner piston (3) and the outer cylinder body (1).
2. Shock absorber according to claim 1, wherein the outer chamber (8) communicates with the inner chamber (20) through a pressure switch valve (12), the inner chamber (20) communicating with the outer chamber (8) through a one-way damping valve (15).
3. The shock absorber according to claim 2, wherein the pressure switch valve (12) comprises a valve body (121), a circular fluid inlet (a) is formed in the upper portion of the valve body (121), a circular valve seat (122) is formed in the upper portion of the fluid inlet (a) of the valve body (121), a cylindrical valve core (125) is arranged in the valve body (1), an outer cylindrical surface of the valve core (125) is in sealing fit with the inner wall of the valve body (121), a circular valve plate (123) capable of being in sealing fit with the valve seat is arranged on the upper portion of the valve core (125), an eccentric rotating shaft (128) is arranged on the valve plate, a compression elastic body (124) is further arranged in the valve core (125), the top of the compression elastic body (124) is of a gradually reduced structure, the rotating shaft (128) is mounted on the top of the compression elastic body (124) in a matching manner, and valve body flow passages (6) are formed in two sides of the compression elastic body (124).
4. The shock absorber according to claim 1, wherein the inner cylinder (2) is provided at a lower portion of its outer circumference with a stopper ring (17) for limiting the displacement position of the outer piston (4), and the outer piston (4) is annular.
5. The shock absorber according to claim 1, wherein the outer piston (4) comprises an annular piston body (41) arranged between the inner cylinder body and the outer cylinder body, at least one side of the piston body (41) is provided with an extension part (42), the extension part (42) is provided with a guide ring (43) in a matching way, and the inner ring section surface (50) and the outer ring section surface (51) of the piston body (41) are sequentially provided with a first sealing ring (44), a second sealing ring (45) and a third sealing ring (48) from bottom to top.
6. Shock absorber according to claim 5, wherein said first sealing ring (44) is arranged to be in contact sealing with the wall to be sealed; the second sealing ring (45) is arranged to form a gap or just contact with the wall, the second sealing ring (45) is made of elastic materials, the second sealing ring (45) comprises an elastic sealing part (451), an expansion part (452) is arranged on the elastic sealing part (451) side close to the piston body, a fixing part (453) is arranged on the expansion part (452) side close to the piston body, and the expansion part (452), the elastic sealing part (451) and the fixing part (453) form an air bag; the piston body (41) is provided with at least one passage (5 a) which is used for communicating the air bag formed by the telescopic part (452), the elastic sealing part (451) and the fixing part (453) with the hydraulic cavity (10), the passage (5 a) is provided with a pressure valve (46), and the passage (5 a) is used for communicating the telescopic part (452), the elastic sealing part (451) and the fixing part (453) into one air bag.
7. Shock absorber according to claim 6, wherein at least one oil channel (5 b) is provided in the piston body (41) between the first sealing ring (44) and the second sealing ring (45) and connected to the hydraulic chamber (10), and wherein the oil channel (5 b) is provided with a non return valve (47) capable of restricting the flow of medium from the hydraulic chamber (10) to between the first sealing ring (44) and the second sealing ring (45).
8. Shock absorber according to claim 6, wherein said third sealing ring (48) is sealingly arranged in contact with a sealing surface.
CN202111624325.3A 2021-12-28 2021-12-28 Gas-liquid damping device Pending CN114233789A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111624325.3A CN114233789A (en) 2021-12-28 2021-12-28 Gas-liquid damping device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111624325.3A CN114233789A (en) 2021-12-28 2021-12-28 Gas-liquid damping device

Publications (1)

Publication Number Publication Date
CN114233789A true CN114233789A (en) 2022-03-25

Family

ID=80763962

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111624325.3A Pending CN114233789A (en) 2021-12-28 2021-12-28 Gas-liquid damping device

Country Status (1)

Country Link
CN (1) CN114233789A (en)

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Application publication date: 20220325