CN111895030B - Hydraulic compression damping valve - Google Patents
Hydraulic compression damping valve Download PDFInfo
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- CN111895030B CN111895030B CN202010760079.3A CN202010760079A CN111895030B CN 111895030 B CN111895030 B CN 111895030B CN 202010760079 A CN202010760079 A CN 202010760079A CN 111895030 B CN111895030 B CN 111895030B
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- oil
- valve body
- oil return
- compression
- compression valve
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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
- F16F9/3207—Constructional features
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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
- F16F9/3415—Special valve constructions; Shape or construction of throttling passages characterised by comprising plastics, elastomeric or porous elements
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention relates to the technical field of shock absorber compression valves, in particular to a hydraulic compression damping valve which comprises a compression valve body, wherein the top of the compression valve body is fixedly connected with an annular baffle, the top of the compression valve body is provided with a circular table groove, the interior of the compression valve body is provided with an oil outlet channel, the interior of the compression valve body is provided with an oil return channel, and the outer surface of the annular baffle is fixedly connected with a first reinforcing ring. The invention has the advantages that: the compression valve body, the circular table groove, the oil outlet channel and the oil return channel are arranged in a matched mode, so that the compression valve body can be prevented from being too high in temperature during working, and the problem that the compression valve body is damaged due to too high temperature during working of the conventional compression valve body is solved; through the cooperation setting of annular baffle, first reinforcement ring, oil return way shell fragment, second reinforcement ring and play oil way shell fragment, can strengthen the structural strength of oil return way shell fragment and play oil way shell fragment, solved the poor condition of current shell fragment operational reliability.
Description
Technical Field
The invention relates to the technical field of shock absorber compression valves, in particular to a hydraulic compression damping valve.
Background
Shock absorbers, also known as shock absorbers. Common shock absorbers include hydraulic shock absorbers and mechanical shock absorbers. Hydraulic shock absorbers are further classified into hydraulic shock absorbers and two-way shock absorbers. The hydraulic shock absorber utilizes the compressibility of liquid and the characteristics of the liquid that the liquid absorbs energy when compressing and dissipates energy when flowing to achieve the purpose of reducing or eliminating shock. The bidirectional shock absorber can axially compress and convert torsional shock into axial shock, and longitudinal shock and torsional shock are reduced or eliminated by utilizing the hydraulic shock absorption principle. The hydraulic shock absorber is commonly used in the shock absorption work of a vehicle, and an important part in the hydraulic shock absorber is a compression valve which is arranged at the bottom in the shock absorber and used for enabling hydraulic oil to achieve the purposes of oil return and oil inlet.
The prior hydraulic shock absorber compression damping valve has the following defects:
1. the compression valve is easy to overheat in the working process, and the service life of the compression valve is influenced;
2. the elastic sheet is not firmly installed, and the working reliability is poor.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a hydraulic compression damping valve.
The purpose of the invention is realized by the following technical scheme: a hydraulic compression damping valve comprises a compression valve body, wherein the top of the compression valve body is fixedly connected with an annular baffle, and the top of the compression valve body is provided with a circular platform groove;
an oil outlet channel is formed in the compression valve body, an oil return channel is formed in the compression valve body, a first reinforcing ring is fixedly connected to the outer surface of the annular baffle, and an oil return channel elastic sheet is fixedly connected to one side of the first reinforcing ring;
a bottom valve is arranged at the bottom of the compression valve body, a second reinforcing ring is fixedly connected to the outer surface of the bottom valve, and an oil outlet channel elastic sheet is fixedly connected to one side of the second reinforcing ring;
there is the ring portion parallel with oil gallery shell fragment at ring baffle's top, and ring baffle and compression valve body top form annular space, the cover is equipped with the lift cover that is located annular space on ring baffle, is equipped with the interior inclined plane that the slope upwards set up outwards on the inner wall upper end of lift cover, is equipped with the bulge loop in ring baffle's outer wall upper end, the outer wall of bulge loop be equipped with the outer inclined plane that interior inclined plane matches, be equipped with two at the lower extreme of lift cover with the spring of oil gallery shell fragment one-to-one.
Optionally, the outer side of the compression valve body is fixedly connected with a cylinder body of the hydraulic shock absorber, and the compression valve body is located at the bottom of the cylinder body of the hydraulic shock absorber.
Optionally, the annular baffle is arranged right above the outlet at the top of the oil return passage, and the vertical cross section of the circular truncated cone groove is trapezoidal.
Optionally, the oil outlet channel penetrates through the compression valve body, the oil outlet channel is communicated with the circular truncated cone groove, and the length of the oil outlet channel is two centimeters.
Optionally, the oil return passage penetrates through the compression valve body, the length of the oil return passage is two centimeters, the upper side and the lower side of the oil return passage elastic sheet at one end of the first reinforcing ring are reinforced by the first reinforcing ring, and the oil return passage elastic sheet is arranged at an outlet at the top of the oil return passage.
Optionally, the bottom valve is fixedly connected to the bottom of the interior of the hydraulic shock absorber cylinder body, and the oil outlet channel elastic sheet is arranged at an outlet at the bottom of the oil outlet channel.
The invention has the following advantages:
1. the hydraulic shock absorber compression damping valve is characterized in that a circular truncated cone groove is formed in the top of a compression valve body, the circular truncated cone groove is formed in the middle of the top of the compression valve body, the vertical section of the circular truncated cone groove is trapezoidal and is communicated with an oil outlet channel, thereby reducing the length of the oil outlet channel, reducing the length of the hydraulic oil moving in the oil outlet channel, thereby reducing the heat generated by the contact of the hydraulic oil and the oil outlet channel, reducing the length of the movement of the hydraulic oil in the oil outlet channel by arranging an oil return channel in the compression valve body, wherein the length of the oil return channel is two centimeters and the oil return channel is shorter, thereby reducing the heat generated by the contact of the hydraulic oil and the oil outlet channel, achieving the purpose of preventing the overhigh temperature of the compression valve body when in work, through the cooperation setting of compression valve body, round platform groove, oil outlet and oil return way, can prevent that the compression valve body from at the during operation high temperature, solve the too high condition of damaging the compression valve body of current compression valve body during operation high temperature.
2. The hydraulic shock absorber compression damping valve is characterized in that a first reinforcing ring is fixedly connected to the outer surface of an annular baffle, an oil return channel elastic sheet is fixedly connected to one side of the first reinforcing ring, the oil return channel elastic sheet is reinforced by the first reinforcing ring on the upper side and the lower side of one end of the first reinforcing ring, when hydraulic oil returns through an oil return channel, the oil return channel elastic sheet is jacked up, the structural strength of the oil return channel elastic sheet can be enhanced, the oil return channel elastic sheet is prevented from being bent and losing elasticity, the oil return channel elastic sheet can continuously and stably work, the reliability is high, similarly, the structural strength of the oil return channel elastic sheet can also be enhanced by matching the second reinforcing ring with the oil return channel elastic sheet, the oil return channel elastic sheet can be prevented from being bent and losing elasticity, the oil return channel elastic sheet can continuously and stably work, the reliability is high, and the structural strength of the oil return channel elastic sheet and the oil return channel elastic sheet can be enhanced by matching the annular baffle, the first reinforcing ring, the oil return channel elastic sheet, the second reinforcing ring and the oil return channel elastic sheet, the problem of current shell fragment operational reliability poor is solved.
Drawings
FIG. 1 is a schematic cross-sectional view of the present invention;
FIG. 2 is a schematic diagram of a first perspective structure according to the present invention;
FIG. 3 is a schematic diagram of a second perspective of the present invention;
FIG. 4 is a schematic cross-sectional view of a first reinforcing ring according to the present invention;
fig. 5 is an enlarged schematic view of a portion a in fig. 3.
In the figure: 1-compression valve body, 2-annular baffle, 3-circular table groove, 4-oil outlet channel, 5-oil return channel, 6-first reinforcing ring, 7-oil return channel elastic sheet, 8-bottom valve, 9-second reinforcing ring and 10-oil outlet channel elastic sheet.
Detailed Description
The invention will be further described with reference to the accompanying drawings, but the scope of the invention is not limited to the following.
As shown in fig. 1-4, a hydraulic compression damping valve comprises a compression valve body 1, wherein the top of the compression valve body 1 is fixedly connected with an annular baffle 2, and the top of the compression valve body 1 is provided with a circular platform groove 3; an oil outlet channel 4 is formed in the compression valve body 1, an oil return channel 5 is formed in the compression valve body 1, a first reinforcing ring 6 is fixedly connected to the outer surface of the annular baffle plate 2, and an oil return channel elastic sheet 7 is fixedly connected to one side of the first reinforcing ring 6; the bottom of the compression valve body 1 is provided with a bottom valve 8, the outer surface of the bottom valve 8 is fixedly connected with a second reinforcing ring 9, and one side of the second reinforcing ring 9 is fixedly connected with an oil outlet channel elastic sheet 10.
As a preferred technical scheme of the invention: the outer side of the compression valve body 1 is fixedly connected with a cylinder body of the hydraulic shock absorber, the compression valve body 1 is positioned at the bottom of the cylinder body of the hydraulic shock absorber, the annular baffle 2 is arranged right above an outlet at the top of the oil return passage 5, the vertical section of the circular truncated cone groove 3 is trapezoidal and is communicated with the oil outlet passage 4, so that the length of the oil outlet passage 4 is reduced, the moving length of hydraulic oil in the oil outlet passage 4 is reduced, the heat generated by the contact of the hydraulic oil with the oil outlet passage 4 is reduced, the oil outlet passage 4 penetrates through the compression valve body 1, the oil outlet passage 4 is communicated with the circular truncated cone groove 3, the length of the oil outlet passage 4 is two centimeters, the oil return passage 5 penetrates through the compression valve body 1, the length of the oil return passage 5 is two centimeters, the oil return passage 5 is shorter, the moving length of the hydraulic oil in the oil return passage 5 is reduced, the heat generated by the contact of the hydraulic oil return passage 5 is reduced, and the purpose of preventing the over-high temperature of the compression valve body 1 during working is achieved, oil return way shell fragment 7 is consolidated by first reinforcing ring 6 in the upper and lower both sides of the one end of first reinforcing ring 6, when hydraulic oil passes through oil return way 5 oil returns, oil return way shell fragment 7 is by jack-up, can strengthen the structural strength of oil return way shell fragment 7, prevent it to buckle and lose elasticity, make it can last stable work, the reliability is high, oil return way shell fragment 7 sets up the exit at oil return way 5 top, 8 fixed connection in the bottom of the inside of hydraulic shock absorber cylinder body of bottom valve, oil return way shell fragment 10 sets up the exit in oil return way 4 bottoms.
The working process of the invention is as follows: when the hydraulic shock absorber works, hydraulic oil flows out through the oil outlet channel 4, the oil outlet channel elastic sheet 10 bends downwards, the hydraulic oil flows out through an outlet at the bottom of the oil outlet channel 4, when the pressure of the oil cylinder is reduced, the hydraulic oil returns through the oil return channel 5, and the hydraulic oil jacks up the oil return channel elastic sheet 7 to return oil from an outlet at the top of the oil return channel 5.
To sum up, when the compression damping valve of the hydraulic shock absorber is used, the circular platform groove 3 is formed in the top of the compression valve body 1, the circular platform groove 3 is formed in the middle of the top of the compression valve body 1, the vertical cross section is trapezoidal and is communicated with the oil outlet channel 4, so that the length of the oil outlet channel 4 is reduced, the moving length of hydraulic oil in the oil outlet channel 4 is reduced, the heat generated by the contact of the hydraulic oil with the oil outlet channel 4 is reduced, the oil return channel 5 is formed in the compression valve body 1, the length of the oil return channel 5 is two centimeters, the oil return channel 5 is shorter, the moving length of the hydraulic oil in the oil return channel 5 is reduced, the heat generated by the contact of the hydraulic oil with the oil return channel 5 is reduced, the purpose of preventing the temperature of the compression valve body 1 from being too high during working is achieved, and the compression valve body 1, the circular platform groove 3, the oil outlet channel 4 and the oil return channel 5 are matched, the over-high temperature of the compression valve body 1 during working can be prevented, and the problem that the compression valve body 1 is damaged due to the over-high temperature of the existing compression valve body 1 during working is solved; the outer surface of the annular baffle plate 2 is fixedly connected with the first reinforcing ring 6, one side of the first reinforcing ring 6 is fixedly connected with the oil return channel elastic sheet 7, the oil return channel elastic sheet 7 is reinforced by the first reinforcing ring 6 at the upper side and the lower side of one end of the first reinforcing ring 6, when hydraulic oil returns through the oil return channel 5, the oil return channel elastic sheet 7 is jacked up, the structural strength of the oil return channel elastic sheet 7 can be enhanced, the oil return channel elastic sheet 7 is prevented from being bent and losing elasticity, the continuous and stable work can be realized, the reliability is high, similarly, the second reinforcing ring 9 is matched with the oil return channel elastic sheet 10, the structural strength of the oil return channel elastic sheet 10 can also be enhanced, the bending and the losing elasticity of the oil return channel elastic sheet 10 are prevented, the continuous and stable work can be realized, the reliability is high, and the structural strength of the oil return channel elastic sheet 7 and the oil return channel elastic sheet 10 can be enhanced through the matching arrangement of the annular baffle plate 2, the first reinforcing ring 6, the oil return channel elastic sheet 7, the second reinforcing ring 9 and the oil return channel elastic sheet 10, the problem of current shell fragment operational reliability poor is solved.
Secondly, as shown in fig. 1 and 5, the top of the annular baffle 2 is provided with a circular ring part parallel to the oil return channel elastic sheet 7, an annular space is formed between the annular baffle 2 and the top of the compression valve body 1, the annular baffle 2 is sleeved with a lifting sleeve 11 positioned in the annular space, the upper end of the inner wall of the lifting sleeve 11 is provided with an inner inclined surface 12 which is inclined upwards and outwards, the upper end of the outer wall of the annular baffle 2 is provided with an outer convex ring 13, the outer wall of the outer convex ring 13 is provided with an outer inclined surface 14 matched with the inner inclined surface 12, and the lower end of the lifting sleeve 11 is provided with two springs 15 which are in one-to-one correspondence with the oil return channel elastic sheet 7.
A first circumferential positioning groove is axially arranged along the outer inclined surface 14, a second circumferential positioning groove corresponding to the first circumferential positioning groove is arranged on the inner inclined surface 12, the first circumferential positioning groove and the second circumferential positioning groove form a flat key installation space, and a flat key is installed in the flat key installation space. The structure can prevent the rotation of the convex ring 13 to cause the spring to be separated from the oil return channel elastic sheet 7.
Furthermore, the lower end of the lifting sleeve 11 is provided with a cantilever piece 16 which is in one-to-one correspondence with the oil return channel elastic sheet 7, the cantilever piece 16 is parallel to the corresponding oil return channel elastic sheet 7, the lower surface of the cantilever piece 16 is provided with a limiting column 17, the upper end of the spring 15 is sleeved on the limiting column 17, the upper end face of the spring 15 acts on the lower surface of the cantilever piece 16, the lower end face of the spring acts on the upper surface of the oil return channel elastic sheet 7, and a gap is reserved between the lower end of the limiting column 17 and the upper surface of the oil return channel elastic sheet 7, so that the oil return channel elastic sheet 7 can be bent upwards to achieve the purpose of oil return.
The oil outlet pressure of the oil return passage 5 is greater than the elastic force of the spring 15.
In addition, the outer edge of the top of the compression valve body 1 is provided with a vertical cylinder 18 which is sleeved on the periphery of the annular baffle 2, the inner wall of the vertical cylinder 18 is provided with a spiral groove, the annular part is provided with a plurality of oil return through holes arranged along the thickness direction of the annular part, so that oil return is timely discharged, and meanwhile, an oil return interval is reserved between the inner wall of the vertical cylinder 18 and the outer edge of the annular part.
In addition, a cross beam 19 is arranged on the circular truncated cone groove 3, two ends of the cross beam 19 are respectively positioned right above an oil inlet of the oil outlet channel 4, a vertical guide hole 20 is formed in the middle of the cross beam 19, the bottom valve is in an inverted T shape, and the vertical guide hole 20 can guide the bottom valve during movement of the bottom valve, so that the movement smoothness of the bottom valve is further improved.
Two ends of the cross beam 19 are respectively provided with a tension spring 21, the tension springs 21 extend into the oil outlet channel 4 one by one, the upper end of each tension spring 21 is connected to the cross beam 19, the lower end of each tension spring 21 is connected to the oil outlet channel elastic sheet 10, and the oil outlet pressure of the oil outlet channel 4 is greater than the tension of each tension spring 21. The tension spring 21 can pull the oil outlet channel elastic sheet 10, so that the oil outlet channel elastic sheet 10 is prevented from being damaged due to overlarge oil pressure, and meanwhile, the tension spring 21 can accelerate the elastic reset of the oil outlet channel elastic sheet 10.
Secondly, the axial lead of the tension spring 21 and the axial lead of the oil outlet channel 4 are distributed in a staggered way.
In addition, a plurality of circulation holes 22 are arranged on the cross beam 19 and are positioned above the oil inlet of each oil outlet channel 4, and the circulation holes 22 are obliquely arranged in the clockwise direction. Which may facilitate the return of oil pressure to form a vortex to mix the oil.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. A hydraulic compression damping valve which characterized in that: the compression valve comprises a compression valve body (1), wherein the top of the compression valve body (1) is fixedly connected with an annular baffle (2), and the top of the compression valve body (1) is provided with a circular table groove (3);
an oil outlet channel (4) is formed in the compression valve body (1), an oil return channel (5) is formed in the compression valve body (1), a first reinforcing ring (6) is fixedly connected to the outer surface of the annular baffle (2), and an oil return channel elastic sheet (7) is fixedly connected to one side of the first reinforcing ring (6);
a bottom valve (8) is arranged at the bottom of the compression valve body (1), a second reinforcing ring (9) is fixedly connected to the outer surface of the bottom valve (8), and an oil outlet channel elastic sheet (10) is fixedly connected to one side of the second reinforcing ring (9);
the top of the annular baffle (2) is provided with a circular ring part parallel to the oil return channel elastic sheet (7), an annular space is formed between the annular baffle (2) and the top of the compression valve body (1), the annular baffle (2) is sleeved with a lifting sleeve (11) positioned in the annular space, the upper end of the inner wall of the lifting sleeve (11) is provided with an inner inclined plane (12) which is obliquely and upwards and outwards arranged, the upper end of the outer wall of the annular baffle (2) is provided with an outer convex ring (13), the outer wall of the outer convex ring (13) is provided with an outer inclined plane (14) matched with the inner inclined plane (12), and the lower end of the lifting sleeve (11) is provided with two springs (15) which are in one-to-one correspondence with the oil return channel elastic sheet (7);
the oil return channel elastic sheet (7) is arranged at an outlet at the top of the oil return channel (5);
the bottom valve (8) is fixedly connected to the bottom of the interior of the hydraulic shock absorber cylinder body, and the oil outlet channel elastic sheet (10) is arranged at an outlet at the bottom of the oil outlet channel (4);
a first circumferential positioning groove is axially arranged along the outer inclined surface (14) on the outer inclined surface (14), a second circumferential positioning groove corresponding to the first circumferential positioning groove is arranged on the inner inclined surface (12), the first circumferential positioning groove and the second circumferential positioning groove form a flat key installation space, and a flat key is installed in the flat key installation space; a cross beam (19) is arranged on the circular platform groove (3), two ends of the cross beam (19) are respectively positioned right above an oil inlet of the oil outlet channel (4), a vertical guide hole (20) is formed in the middle of the cross beam (19), the bottom valve is in an inverted T shape, and the vertical guide hole (20) can guide the bottom valve when the bottom valve moves; be equipped with one extension spring (21) respectively at the both ends of crossbeam (19), extension spring (21) stretch into one by one in oil channel (4), and the upper end of extension spring (21) is connected on crossbeam (19), and the lower extreme of extension spring (21) is connected on oil channel shell fragment (10), and the oil pressure that produces oil of oil channel (4) is greater than the pulling force of extension spring (21).
2. The hydraulic compression damping valve as recited in claim 1, wherein: the outer side of the compression valve body (1) is fixedly connected with a cylinder body of the hydraulic shock absorber, and the compression valve body (1) is located at the bottom of the cylinder body of the hydraulic shock absorber.
3. The hydraulic compression damping valve as recited in claim 1, wherein: the annular baffle (2) is arranged right above an outlet at the top of the oil return passage (5), and the vertical section of the circular platform groove (3) is trapezoidal.
4. The hydraulic compression damping valve as recited in claim 1, wherein: the oil outlet channel (4) penetrates through the compression valve body (1), the oil outlet channel (4) is communicated with the circular table groove (3), and the length of the oil outlet channel (4) is two centimeters.
5. The hydraulic compression damping valve as recited in claim 1, wherein: the oil return passage (5) penetrates through the compression valve body (1), the length of the oil return passage (5) is two centimeters, and the oil return passage elastic sheet (7) is reinforced by the first reinforcing ring (6) on the upper side and the lower side of one end of the first reinforcing ring (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010760079.3A CN111895030B (en) | 2020-07-31 | 2020-07-31 | Hydraulic compression damping valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010760079.3A CN111895030B (en) | 2020-07-31 | 2020-07-31 | Hydraulic compression damping valve |
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| Publication Number | Publication Date |
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| CN111895030A CN111895030A (en) | 2020-11-06 |
| CN111895030B true CN111895030B (en) | 2022-03-01 |
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| CN202010760079.3A Active CN111895030B (en) | 2020-07-31 | 2020-07-31 | Hydraulic compression damping valve |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1237821A (en) * | 1959-06-23 | 1960-08-05 | Houdaille Maurice Ets | Improvements to telescopic shock absorbers |
| CN2222256Y (en) * | 1995-06-26 | 1996-03-13 | 江苏省金坛市阀门厂 | Integrated type hydraulic power device |
| CN101029670A (en) * | 2007-02-15 | 2007-09-05 | 株洲联诚集团减振器有限责任公司 | One-way valve of oil-pressure vibration reducer for railway |
| CN201059333Y (en) * | 2007-07-20 | 2008-05-14 | 隆昌山川减振器工业有限公司 | Bottom valve sub-unit of hydraulic absorber compression damping valve |
| DE102014208083A1 (en) * | 2014-04-29 | 2015-10-29 | Bayerische Motoren Werke Aktiengesellschaft | Damper for a vehicle |
| CN105090152B (en) * | 2015-09-11 | 2017-03-08 | 福州大学 | A kind of two grades of dual spring direct-acting overflow valves and its control method |
| CN111043224B (en) * | 2019-12-19 | 2021-09-28 | 湖南联诚轨道装备有限公司 | Bottom valve of oil pressure shock absorber |
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2020
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