CN108662067B - Damper - Google Patents
Damper Download PDFInfo
- Publication number
- CN108662067B CN108662067B CN201810801641.5A CN201810801641A CN108662067B CN 108662067 B CN108662067 B CN 108662067B CN 201810801641 A CN201810801641 A CN 201810801641A CN 108662067 B CN108662067 B CN 108662067B
- Authority
- CN
- China
- Prior art keywords
- compensation film
- tubular shell
- bearing
- rod
- piston
- 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.)
- Active
Links
- 238000007789 sealing Methods 0.000 claims abstract description 48
- 239000012530 fluid Substances 0.000 claims abstract description 19
- 238000003860 storage Methods 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 4
- 238000001125 extrusion Methods 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Classifications
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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
- F16F9/3214—Constructional features of pistons
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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
- F16F9/36—Special sealings, including sealings or guides for piston-rods
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention discloses a damper, comprising: a tubular housing; an end cap; the bearing is arranged in the inner cavity of the tubular shell; a piston assembly comprising a piston and a rod; the compensating film is of a cup-shaped sleeve structure of a deformable material sleeved on the rod, an opening part of the cup-shaped sleeve is connected with the inner wall of the tubular shell in a sealing way, and the bottom of the cup-shaped sleeve is connected with the rod in a sealing way; the inner cavity of the tubular shell is sequentially divided into a compensation chamber, a storage chamber and a pressure chamber from the open end to the closed end by the compensation film and the piston, at least one fluid path used for communicating the storage chamber and the pressure chamber is arranged on the piston assembly, and at least one fluid path used for communicating two sides of the bearing is arranged on the bearing. The beneficial effects of the invention include: the compensation film provides pressure compensation for the damper during operation, and has good tightness to pressure medium in the damper.
Description
Technical Field
The present invention relates to a damper.
Background
A damper is a device for providing resistance to movement and consuming movement energy. The damper mainly comprises a tubular shell piston, a piston rod and pressure medium filled in the tubular shell, wherein the tubular shell is of a sealing structure in order to prevent the pressure medium from leaking, but when the damper works, the piston and the piston rod move up and down, the volume of the piston rod in the tubular shell can change, so that the space of the piston rod in the tubular shell, which belongs to the pressure medium, changes, namely the pressure in the tubular shell changes, and the normal work of the damper is influenced. A certain compensation for the aforementioned pressure variations is therefore required.
Disclosure of Invention
The invention aims to overcome the technical defects, and provides a damper which solves the technical problem that the damper in the prior art needs certain pressure compensation when working.
In order to achieve the above technical object, the present invention provides a damper, including:
a tubular housing having one end closed and the other end open;
an end cap provided at an open end of the tubular housing;
the bearing is arranged in the inner cavity of the tubular shell;
the piston assembly comprises a piston and a rod, wherein the piston is arranged in the inner cavity of the tubular shell and can do reciprocating sliding motion along the inner wall of the tubular shell; one end of the rod sequentially penetrates through the end cover and the bearing and is connected with the piston; and
The compensating film is a cup-shaped sleeve structure of a deformable material sleeved on the rod, an opening part of the cup-shaped sleeve is in sealing connection with the inner wall of the tubular shell, and the bottom of the cup-shaped sleeve is in sealing connection with the rod;
the inner cavity of the tubular shell is sequentially divided into a compensation chamber, a storage chamber and a pressure chamber from the open end to the closed end by the compensation film and the piston, at least one fluid path used for communicating the storage chamber and the pressure chamber is arranged on the piston assembly, and at least one fluid path used for communicating two sides of the bearing is arranged on the bearing.
Compared with the prior art, the invention has the beneficial effects that: the compensation film provides pressure compensation for the damper during working, and has good tightness to pressure medium in the damper; the bearing with the improved structure ensures that the movement of the piston rod is stable, can also help to improve the stability and the tightness of the compensation film, can better control the pressure medium storage and can remove the redundant air more simply and thoroughly.
Drawings
FIG. 1 is a schematic view of a damper of the present invention in a use condition;
FIG. 2 is a schematic cross-sectional view of FIG. 1;
FIG. 3 is a schematic view of another damper of the present invention in use;
FIG. 4 is a schematic cross-sectional view of FIG. 3;
FIG. 5 is a schematic cross-sectional structural view of a compensation film positioning cylinder;
FIG. 6 is a top view of the compensation film positioning cartridge;
FIG. 7 is a schematic perspective view of a compensation film positioning cylinder
FIG. 8 is a schematic perspective view of one embodiment of a compensation film;
FIG. 9 is a schematic cross-sectional structural view of one embodiment of a compensation film;
FIG. 10 is a schematic perspective view of another embodiment of a compensation film;
FIG. 11 is a schematic cross-sectional structural view of another embodiment of a compensation film;
FIG. 12 is a schematic perspective view of a bearing;
fig. 13 is a schematic cross-sectional structural view of a bearing.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1 to 4, the present invention provides a damper including: the piston assembly comprises a tubular housing 10, an end cap 20, a bearing 30, a piston assembly 40 and a compensation film 50.
One end of the tubular shell 10 is closed, and the other end is open; an end cap 20 is provided at the open end of the tubular housing 10; a bearing 30 is provided in the inner cavity of the tubular housing 10.
The piston assembly 40 comprises a piston 41 and a rod 42, wherein the piston 41 is arranged in the inner cavity of the tubular shell 10 and can do reciprocating sliding motion along the inner wall of the tubular shell 10; one end of the rod 42 passes through the end cap 20 and the bearing 30 in turn and is connected to the piston 41.
The compensation film 50 is a cup-shaped sleeve structure of a deformable material sleeved on the rod 42, an opening 51 of the cup-shaped sleeve is in sealing connection with the inner wall of the tubular housing 10, and a bottom 52 of the cup-shaped sleeve is in sealing connection with the rod 42.
The inner cavity of the tubular housing 10 is divided into a compensation chamber 11, a storage chamber 12 and a pressure chamber 13 from an open end to a closed end by the compensation film 50 and the piston 41, at least one fluid path for communicating the storage chamber 12 and the pressure chamber 13 is provided on the piston assembly 40, and at least one fluid path for communicating both sides of the bearing 30 is provided on the bearing assembly 40.
In the damper assembly of this embodiment, the piston 41 is connected to the rod 42 to form the piston assembly 40, the piston 41 is pushed into the tubular housing 10, the bearing 30 is fitted over the rod 42 and fitted into the tubular housing 10, the compensation film 50 is fitted over the rod 42 so that the opening thereof is directed toward the closed end of the tubular housing 10 to feed the tubular housing 10, a pressure medium is injected, the open end of the tubular housing 10 is finally closed with the end cap 20, and a return spring or the like is fitted over the rod 42 outside the tubular housing 10 to complete the assembly. When the pressure medium is injected, the piston 41 may be pushed to the closed end of the tubular housing 10, and then the pressure medium may be pressure oil or inert gas, which is injected into the storage chamber 12 and the pressure chamber 13.
In operation of the damper of this embodiment, the pressure exerted by the damper drives the piston assembly 40 from the open end of the tubular housing 10 to the closed end thereof, and the medium stored in the pressure chamber 13 is moved along the fluid path of the piston 41 into the reservoir 12 and through the fluid path of the bearing 30 to the compensation diaphragm 50. When the pressure applied to the damper is removed, as shown in fig. 3-4, the piston assembly 40 is moved from the closed end of the tubular housing 10 to the open end thereof by the spring 70, thereby allowing the medium in the accumulator chamber 12 to flow back into the pressure chamber 13 via the fluid path. With the gradual withdrawal of the rod 42, the storage chamber 12 and the pressure chamber 13 filled with the pressure medium in the tubular housing 10 will form a certain vacuum degree, and if the vacuum degree is too large, the generated negative pressure will affect the resetting of the piston assembly 40, and at this time, the compensation film 50 will deform into the storage chamber 12 under the influence of the negative pressure to compensate for the space loss caused by the withdrawal of the rod 42 from the tubular housing 10, so as to realize vacuum compensation.
Preferably, the end cap 20 is provided with at least one fluid path for communicating the compensation chamber 11 with the outside of the damper, so that the compensation chamber 11 communicates with the outside, such as another fluid storage device, or directly communicates with the atmosphere, to enhance the compensation effect of the compensation film 50.
As shown in fig. 2 and 4, the damper further includes a compensation film positioning cylinder 60 corresponding to the inner diameter of the tubular housing 10, the opening 51 of the compensation film 50 has a thickened outer edge 511, one end of the compensation film positioning cylinder 60 abuts against the end cover 20, and the other end abuts against the thickened outer edge 511 of the opening 51 of the compensation film 50, so that the opening 51 of the compensation film 50 abuts against the connection between the bearing 30 and the inner wall of the tubular housing 10. The compensation film positioning cylinder 60 can better position the compensation film 50, and indirectly stabilizes the bearing 30. The inside diameter of the tubular housing 10 may be varied on the other side of the bearing 30 (i.e., the side of the bearing surface opposite the closed end of the tubular housing 10) to limit the bearing 30.
The open end of the tubular housing 10 has a radial flange portion 14 for pressing and fixing the compensation film positioning cylinder 60, the compensation film 50, and the bearing 30. When the damper is packaged, the opening of the tubular shell 10 can be turned inwards under the action of a die, the flanging part 14 extrudes and fixes the compensation film positioning cylinder 60, the compensation film 50 and the bearing 30, and axial pressure is generated when the damper is packaged and turned, so that the opening part 51 of the compensation film 50 is pressed, and further the sealing strengthening effect is achieved.
As shown in fig. 5, an end of the compensation-film positioning cylinder 60 abutting against the end cap 20 is an annular abutting portion 61 extending in a radial direction, and the annular abutting portion 61 is provided with at least one fluid path for communicating both sides thereof. The annular abutting portion 61 of the compensation film positioning cylinder 60 can enable the contact surface between the compensation film positioning cylinder and the end cover 20 to be larger, and the stress of the end cover 20 can be more uniform. Meanwhile, the annular abutting part 61 of the compensation film positioning cylinder 60 can limit the bottom position 52 of the compensation film 50, so that the bottom 52 can be tightly attached to the rod 42, and the tightness is better. At least one fluid path for communicating the two sides of the annular abutment 61 is provided, ensuring that the compensation chamber 11 can still communicate with the outside.
As shown in fig. 5 to 7, the annular contact portion 61 of the compensation film positioning cylinder 60 is provided with at least one sinking groove 611, and the sinking groove 611 is provided with a through hole 612 penetrating through both sides of the annular contact portion 61. The combination of the through hole 612 and the sink groove 611 constitutes a fluid path that communicates both sides of the annular abutment 61.
As shown in fig. 2 and 4, the outer diameter of the end cap 20 is smaller than the inner diameter of the tubular housing 10, and the sinking groove 611 provided by the annular abutment 61 of the compensation film positioning cylinder 60 is partially covered by the end cap 20, i.e., the end cap 20 covers only a portion of the sinking groove 611, so that the annular abutment 61 of the compensation film positioning cylinder 60 provides sufficient support for the end cap 20, and at this time, the outer diameter outer edge of the end cap 20 and the sinking groove 611 of the compensation film positioning cylinder 60 form an effective fluid path for communicating both sides of the end cap 20, ensuring that the compensation chamber 11 can communicate with the outside. The portion of the end cap 20 that is used for abutting against the annular abutting portion 61 may be flange-shaped, so as to increase the area of the end cap 20 that is used for abutting against, and enhance the stability of the structure.
As shown in fig. 8 to 11, the bottom 52 of the compensation film 50 has an extension 521 along the axial direction thereof, and the end cap 20 has an annular gap 21 accommodating the extension 521, and the annular gap 21 closely fits the extension 521 of the compensation film 50 to the rod 42. The extension 521 of the compensation film 50 increases the contact area with the rod 42, so that the tightness can be improved, and the annular gap 21 of the end cover 20 provides a limiting space for the extension 521 of the compensation film 50, and helps to improve the fitting degree of the extension 521 with the rod 42.
As shown in fig. 2 and 4, the annular gap 21 of the end cap 20 is deepened in the axial direction and the end cap 20 is formed with a boss 22 in the axial direction thereof. The annular gap 21 of the end cap 20 is axially deepened, so that the extension 521 of the compensation film 50 can be more entered, and the area where the extension 521 is closely attached to the rod 42 is increased, that is, the sealing property is further improved. And, the boss 22 formed by the end cap 20 can extend into the spring 70, facilitating stabilization of the spring 70 when it abuts the end cap 20.
The inner wall and the outer wall of the extension 521 are coaxially formed with an inner sealing portion 521a and an outer sealing portion 521b, respectively, having annular shapes. The inner sealing portion 521a and the outer sealing portion 521b may be formed of two or more layers, as shown in fig. 8 and 9, and the sealing property is enhanced as the number of layers is increased; the inner and outer sealing parts 521a and 521b may be one layer, as in fig. 10 and 11, for convenience of production. The inner 521a and outer 521b seals are interference fit with the annular gap 21 of the rod 42 and the end cap 20, respectively. The inner and outer sealing portions 521a, 521b of the extension 521 facilitate an interference fit between the extension 521 and the rod 42 and the end cap 20 for the purpose of ensuring tightness. Further, a plurality of inner sealing portions 521a and outer sealing portions 521b may be provided, and the sealing performance is improved as the number of stages increases.
Preferably, the cross sections of the inner sealing portion 521a and the outer sealing portion 521b are tapered from top to bottom or tapered from middle to both ends, which reduces the contact area between the inner sealing portion 521a and the outer sealing portion 521b and the rod 42 and the end cover 20, respectively, so that the inner sealing portion 521a and the outer sealing portion 521b have a certain deformation space, and the deformation extrusion force can be minimized on the basis of ensuring sealing. And when the cross sections of the inner and outer sealing parts 521a and 521b are in the form of a shuttle, the maximum width thereof is near the lower end thereof. It can be convenient for extension 521 of compensation film 50 to be able to more closely abut against the outer peripheral surface of rod 32 and the inner wall of end cap 20 by inner seal 412 and outer seal 413 under the action of the medium in storage chamber 12.
The cross sections of the inner sealing portion 521a and the outer sealing portion 521b may be triangular, and the base angle thereof on the side of the end cap 20 may be 10 to 17 ° and the base angle thereof on the side of the bearing 30 may be 27 to 35 °. Which ensures that the medium in the storage chamber 12 presses against one of the faces of the triangle and enables both the inner and outer sealing parts 521a, 521b to abut more closely against the outer peripheral surface of the rod 42 and the inner wall of the end cap 20.
As shown in fig. 12 and 13, the bearing 30 includes a sleeve portion 31 fitted over the rod 42, and a support portion 32 fixedly attached to the inner wall of the tubular housing 10; the support portion 32 has an annular step 321 that closely adheres the opening 51 of the compensation film 50 to the inner wall of the tubular housing 10. The sleeve portion 31 has a certain length in the axial direction of the rod 42, so that the contact surface with the rod 42 can be properly increased to improve the stability of the rod 42 when performing the piston movement. And further, the shaft sleeve portion 31 may extend toward the end cap 20 to cooperate with the annular abutment portion 61 of the compensation film positioning cylinder 60 to stabilize the extension 521 of the compensation film 50. The outer edge of the supporting portion 32 is used for abutting against the inner wall of the tubular housing 10, the annular step 321 is used for extending into the opening portion 51 of the compensation film 50, that is, an annular groove formed between the outer edge of the annular step 321 and the inner wall of the tubular housing 10 can enable the opening portion 51 of the compensation film 50 to be tightly attached to the inner wall of the tubular housing 10 and be matched with the compensation film positioning cylinder 60, so that the tightness between the opening portion 51 of the compensation film 50 and the inner wall of the tubular housing 10 is improved.
The above-described embodiments of the present invention do not limit the scope of the present invention. Any other corresponding changes and modifications made in accordance with the technical idea of the present invention shall be included in the scope of the claims of the present invention.
Claims (5)
1. A damper, comprising:
a tubular housing having one end closed and the other end open;
an end cap provided at an open end of the tubular housing;
the bearing is arranged in the inner cavity of the tubular shell;
the piston assembly comprises a piston and a rod, wherein the piston is arranged in the inner cavity of the tubular shell and can do reciprocating sliding motion along the inner wall of the tubular shell; one end of the rod sequentially penetrates through the end cover and the bearing and is connected with the piston;
the compensating film is a cup-shaped sleeve structure of a deformable material sleeved on the rod, an opening part of the cup-shaped sleeve is in sealing connection with the inner wall of the tubular shell, and the bottom of the cup-shaped sleeve is in sealing connection with the rod; and
The compensation film positioning cylinder is adapted to the inner diameter of the tubular shell, the opening part of the compensation film is provided with a thickened outer edge, one end of the compensation film positioning cylinder is abutted against the end cover, and the other end of the compensation film positioning cylinder is abutted against the thickened outer edge of the opening part of the compensation film, so that the opening part of the compensation film is abutted against the joint of the bearing and the inner wall of the tubular shell;
the bottom of the compensation film is provided with an extending part along the axial direction of the compensation film, the end cover is provided with an annular gap for accommodating the extending part, and the annular gap enables the extending part of the compensation film to be tightly fitted with the rod; the annular gap of the end cover deepens along the axial direction and the end cover forms a bulge along the axial direction; an inner sealing part and an outer sealing part which are annular are coaxially formed on the inner wall and the outer wall of the extension part respectively, and the inner sealing part and the outer sealing part are in interference fit with annular gaps of the rod and the end cover respectively; the cross sections of the inner sealing part and the outer sealing part are wedge-shaped with gradually increased widths from top to bottom or fusiform with gradually reduced widths from the middle part to two ends, and when the cross sections of the inner sealing part and the outer sealing part are fusiform, the largest width part is close to the lower end of the inner sealing part and the outer sealing part; or, the cross sections of the inner sealing part and the outer sealing part are triangular, the base angle of the inner sealing part and the outer sealing part at one side of the end cover is 10-17 degrees, and the base angle of the inner sealing part and the outer sealing part at one side of the bearing is 27-35 degrees; the bearing comprises a shaft sleeve part sleeved on the rod and a supporting part fixedly connected to the inner wall of the tubular shell; the supporting part is provided with an annular step which enables the opening part of the compensation film to be tightly attached to the inner wall of the tubular shell;
the inner cavity of the tubular shell is sequentially divided into a compensation chamber, a storage chamber and a pressure chamber from the open end to the closed end by the compensation film and the piston, at least one fluid path used for communicating the storage chamber and the pressure chamber is arranged on the piston assembly, and at least one fluid path used for communicating the two sides of the bearing is arranged on the bearing; when the pressure medium is injected, the piston is pushed to the closed end of the tubular shell, and then the pressure medium is injected into the storage chamber and the pressure chamber.
2. A damper according to claim 1, wherein: the end cover is provided with at least one fluid path for communicating the compensation chamber with the outside of the damper.
3. A damper according to claim 2, wherein: one end of the compensation film positioning cylinder, which is abutted against the end cover, is an annular abutting part extending towards the radial direction, and the annular abutting part is provided with at least one fluid path for communicating two sides of the annular abutting part.
4. A damper according to claim 3, wherein: the annular abutting part of the compensation film positioning cylinder is provided with at least one sinking groove, and through holes penetrating through two sides of the annular abutting part are arranged in the sinking groove.
5. The damper according to claim 4, wherein: the outer diameter of the end cover is smaller than the inner diameter of the tubular shell, and a sinking groove part arranged at the annular abutting part of the compensation film positioning cylinder is covered by the end cover; the open end of the tubular shell is provided with a radial flanging part which is used for fixing the compensation film positioning cylinder, the compensation film and the bearing in an extrusion mode.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810801641.5A CN108662067B (en) | 2018-07-20 | 2018-07-20 | Damper |
| PCT/CN2019/094642 WO2020015536A1 (en) | 2018-07-20 | 2019-07-04 | Damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810801641.5A CN108662067B (en) | 2018-07-20 | 2018-07-20 | Damper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108662067A CN108662067A (en) | 2018-10-16 |
| CN108662067B true CN108662067B (en) | 2024-03-08 |
Family
ID=63789239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810801641.5A Active CN108662067B (en) | 2018-07-20 | 2018-07-20 | Damper |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN108662067B (en) |
| WO (1) | WO2020015536A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108662067B (en) * | 2018-07-20 | 2024-03-08 | 何亮 | Damper |
| CN111120455B (en) * | 2019-12-24 | 2024-04-30 | 安徽博微联控科技有限公司 | Quick inserting and time-delay separating device |
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| CN208565393U (en) * | 2018-07-20 | 2019-03-01 | 何亮 | Damper |
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| WO2020015536A1 (en) | 2020-01-23 |
| CN108662067A (en) | 2018-10-16 |
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