CN105276057B - Pneumatic damping buffer - Google Patents
Pneumatic damping buffer Download PDFInfo
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- CN105276057B CN105276057B CN201410320885.3A CN201410320885A CN105276057B CN 105276057 B CN105276057 B CN 105276057B CN 201410320885 A CN201410320885 A CN 201410320885A CN 105276057 B CN105276057 B CN 105276057B
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- pull rod
- piston assembly
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- Pistons, Piston Rings, And Cylinders (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention discloses a pneumatic damping buffer which comprises a cylinder body (1), and further comprises a piston assembly (12) and a pull rod (2), wherein the piston assembly (12) is installed at one end of the pull rod (2), the piston assembly (12) is installed in the cylinder body (1), the outer wall of the piston assembly (12) is in contact with the inner wall of the cylinder body (1), and a vent groove (11) is formed in the inner wall of the cylinder body (1) along the length direction of the cylinder body (1). The invention provides a novel buffer structure which has the characteristics of obvious damping effect, stable work and long service life.
Description
the technical field is as follows:
The invention relates to the technical field of buffers, in particular to a pneumatic damping buffer with a remarkable damping effect.
Background art:
The buffer mainly used for inhibiting the vibration and impact during rebound plays a role of buffering, and less impact is used for protecting other structures in equipment. The spring buffer has the following disadvantages: 1. due to the presence of the self-vibration phenomenon, low-frequency vibrations are easily transmitted. 2. The damping is too small, the critical damping ratio is generally only 0.005, and therefore, the resonance phenomenon is generated in the range close to the frequency of the equipment. 3. The operating condition of the spring is also not very stable, since the spring is easily damaged by fatigue during use.
The invention content is as follows:
the invention aims to provide a pneumatic damping buffer, which has the characteristics of obvious damping effect, stable work and long service life and provides a novel buffer structure.
In order to achieve the purpose, the pneumatic damping buffer comprises a cylinder body, a piston assembly and a pull rod, wherein the piston assembly is installed at one end of the pull rod, the piston assembly is installed in the cylinder body, the outer wall of the piston assembly is in contact with the inner wall of the cylinder body, and a vent groove is formed in the inner wall of the cylinder body along the length direction of the cylinder body.
Preferably, the piston assembly includes a piston sleeve that expands with an increase in air pressure, and an outer wall of the piston sleeve is in contact with an inner wall of the cylinder.
Preferably, the piston sleeve is a sleeve-shaped structure with one end open, and the piston sleeve is made of an elastic material.
Preferably, the piston assembly includes a piston ring that expands with an increase in air pressure, and an outer wall of the piston ring is in contact with an inner wall of the cylinder.
Preferably, the piston assembly comprises an upper piston and a lower piston, the upper piston is connected with the pull rod, the piston sleeve and the piston ring are installed between the upper piston and the lower piston, and inner holes in the piston sleeve, the piston ring and the lower piston are communicated with each other.
Preferably, one end of the cylinder body is provided with an outer cover, and the other end of the cylinder body is provided with an inner cover.
Preferably, the cylinder body is provided with a sealing ring at an outlet at one end of the inner cover, and the pull rod penetrates through the sealing ring to be connected with the piston assembly.
Preferably, a pull cap is installed at one end of the pull rod, and one end of the pull cap, which is far away from the pull rod, is spherical.
preferably, the pull cap and the pull rod are in threaded connection, and the cross section of the vent groove is square.
Preferably, the outer wall of the piston sleeve is provided with a sealing layer capable of improving the contact performance.
The invention has the beneficial effects that: the invention provides a novel buffer structure which has the characteristics of obvious damping effect, stable work, long service life and prolongs the service life, rigidity and precision of a machine tool guide rail.
description of the drawings:
The invention is further described below with reference to the accompanying drawings:
FIG. 1 is a schematic structural diagram of an embodiment of the present invention
FIG. 2 is a schematic diagram of the operation of the embodiment of the present invention
Fig. 3 is a schematic diagram of the operation of the embodiment of the present invention.
In the figure: 1. a cylinder body; 2. a pull rod; 3. a seal ring; 4. pulling the cap; 5. a piston sleeve; 6. a sealing layer; 7. an outer cover; 8. a piston ring; 9. a lower piston; 10. an upper piston; 11. a vent channel; 12. a piston assembly; 13. an inner cover.
The specific implementation mode is as follows:
The following description is only exemplary of the preferred embodiments embodying the principles of the present invention and is not intended to limit the scope of the invention
Example (b): as shown in fig. 1, an embodiment of a pneumatic damping bumper according to the present invention includes a cylinder 1, the cross section of the cylinder 1 may be any regular shape, specifically, in the present embodiment, the cylinder 1 is cylindrical, and the cylindrical cylinder 1 may have a wall thickness meeting certain strength requirements, more specifically, the cylinder 1 may be made of alloy steel or high strength hard plastic, the bumper further includes a piston assembly 12 and a pull rod 2, the pull rod 2 may be made of a metal material, and the cross section of the pull rod 2 in the present embodiment is circular, the piston assembly 12 is installed at one end of the pull rod 2, the piston assembly 12 is installed in the cylinder 1, and the outer wall of the piston assembly 12 contacts the inner wall of the cylinder 1, a vent groove 11 is formed on the inner wall of the cylinder 1 along the length direction of the cylinder 1, and one side of the vent groove 11 is open, the vent groove 11 is parallel to the axis of the cylinder body 1 and is communicated with the inner cavity of the cylinder body 1, the cross section of the vent groove 11 can be in any regular shape, specifically, in the embodiment, the cross section of the vent groove 11 is square, in addition, the vent groove 11 can be integrally cast and formed by the cylinder body 1, in addition, the position of the vent groove 11 in the embodiment needs to meet certain requirements, one end of the pull rod 2 entering the cylinder body 1 is a first end, the other end of the cylinder body far away from the first end is a second end, the end close to the first end in two ends of the vent groove 11 is a third end, the other end is a fourth end, a certain distance is arranged between the first end and the third end, the distance needs to be not less than the length of the piston assembly 12, and the second end can be aligned with the.
In addition, in the present embodiment, the piston assembly 12 includes a piston sleeve 5 that expands with an increase in air pressure, an outer wall of the piston sleeve 5 contacts an inner wall of the cylinder 1, the piston sleeve 5 has a sleeve-like structure with one end open, the piston sleeve 5 is made of an elastic material, and more specifically, the piston sleeve 5 may be made of an elastic plastic material, and when the pressure increases, a pressure force acts on the inner wall of the piston sleeve 5 to expand the entire piston sleeve 5, so that the pressure between the outer wall of the piston sleeve 5 and the inner wall of the cylinder 1 increases, thereby increasing the damping force.
The piston assembly 12 includes a piston ring 8 expanding with the increase of the air pressure, the piston ring 8 is a ring body with a certain thickness, the piston ring 8 can be made of elastic plastic material, the working principle of the piston ring 8 is the same as the working principle of the piston sleeve 5, that is, when the pressure is increased, the pressure acting force on the inner wall of the piston ring 8 makes the whole piston ring 8 expand so as to increase the pressure between the outer wall of the piston ring 8 and the inner wall of the cylinder 1, thereby increasing the damping force, the outer wall of the piston ring 8 contacts with the inner wall of the cylinder 1, and in this embodiment, the piston ring 8 and the piston sleeve 5 can be integrally formed, and the piston ring 8 can also be fixed on the piston sleeve 5.
Furthermore, the piston assembly 12 in this embodiment further includes an upper piston 10 and a lower piston 9, specifically, the upper piston 10 is a solid component and the lower piston 9 is a hollow component, the upper piston 10 is connected to the pull rod 2, the piston 10 and the pull rod 2 can be connected by any mounting method such as welding or screwing, the piston sleeve 5 and the piston ring 8 are mounted between the upper piston 10 and the lower piston 9, the inner holes of the piston sleeve 5, the piston ring 8 and the lower piston 9 are communicated with each other, when in operation, air enters from the central hole of the lower piston 9 and acts on the inner wall of the piston sleeve 5, the piston ring 8, the upper piston 10 and the lower piston 9, and in this embodiment, the shape of the piston sleeve 5, the piston ring 8, the upper piston 10 and the lower piston 9 is matched with the inner hole of the cylinder 1.
In this embodiment, an outer cap 7 is provided at one end of the cylinder 1, an inner cap 13 is provided at the other end, a semi-closed inner space is formed among the cylinder 1, the outer cap 7 and the inner cap 13, and the outer cap 7 in this embodiment is stepped, more specifically, the outer cap 7 is sealed at the rear opening of the cylinder 1 and is externally arranged, the inner cap 13 is installed at the front opening of the cylinder 1, the inner cap 13 is internally arranged, and the front opening of the cylinder 1 is in a reduced shape.
In order to improve cylinder body 1's sealing performance in this embodiment, be provided with sealing washer 3 in the exit that cylinder body 1 was provided with inner cup 13 one end, pull rod 2 passes sealing washer 3 with piston assembly 12 is connected, in order to reduce the frictional force between pull rod 2 and the sealing washer 3, needs to set up the lubrication on the contact surface between pull rod 2 and sealing washer 3, specifically speaking can coat the butter on contact surface between them, and the butter both can play the lubrication action, and can also eliminate the clearance between pull rod 2 and the sealing washer 3 and be unlikely to influence cylinder body 1's leakproofness.
The one end that the cylinder body 1 was kept away from to pull rod 2 in this embodiment is installed and is drawn cap 4, the effect of drawing cap 4 lies in making things convenient for it to be connected with other impact member, and the one end that draws cap 4 to keep away from pull rod 2 in this embodiment is globular, it can have the cast molding to draw cap 4, and the one end that draws cap 4 to keep away from pull rod 2 is globular can conveniently connect, easily realize the universal joint and connect, and draw cap 4 also more various with pull rod 2's connected mode, more specifically say that draw cap 4 and pull rod 2 in this embodiment adopt the threaded connection mode, mainly be convenient for dismantle.
The outer wall of the piston sleeve 5 is provided with a sealing layer 6 capable of improving the contact performance, the sealing layer 6 is made of soft plastic, and the sealing layer can be fixed on the outer surface of the piston sleeve 5 in an adhesion mode, so that the contact performance between the outer wall of the piston sleeve 5 and the inner wall of the cylinder 1 can be improved, the sealing performance is improved, air leakage of spaces on two sides of the piston assembly 12 in a mode except for the vent grooves 11 is prevented, the shock absorption performance can be improved, the contact performance between two sides is improved together with the abrasion of the piston assembly 12 caused by the friction between the piston assembly 12 and the cylinder 1, and the smoothness of the inner wall of the cylinder 1 needs to meet the requirement in the embodiment.
As shown in fig. 2, when the piston assembly 12 of this embodiment moves from the lower end to the upper end in the direction of the arrow, the chamber below the piston assembly 12 is in a vacuum state, the distance between the piston bush 5 and the piston ring 8 is shortened, the piston bush 5 and the piston ring 8 are expanded and closely attached to the inner wall of the cylinder 1 by the force of the air pressure, the pressure difference between the chambers above and below the piston assembly 12 is maximized, the pressure between the piston bush 5 and the piston ring 8 and the inner wall of the cylinder 1 is maximized, and the frictional force thereof is maximized, so that the damping force of the piston assembly 12 is maximized, when the piston assembly 12 moves slowly to the vent groove 11, the air in the chamber above the piston assembly 12 enters the chamber below, during which the pressure difference between the chambers above and below is reduced, and the pressures between the piston bushes 5 and the piston ring 8 and the inner wall of the cylinder 1 are also small, accordingly, the friction between the piston sleeve 5 and the piston ring 8 and the inner wall of the cylinder 1 is reduced until the piston assembly 12 moves to the uppermost end, at which point the pressure in the chamber above the piston assembly 12 is zero, and accordingly the damping force is zero.
Fig. 3 shows the piston assembly 12 moving from the upper end to the lower end in the direction of the arrow, which is the reverse movement shown in fig. 2, and the damping force applied during the movement is just opposite to the damping force applied during the movement shown in fig. 2.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (8)
1. A pneumatic damping buffer comprises a cylinder body (1), and is characterized by further comprising a piston assembly (12) and a pull rod (2), wherein the piston assembly (12) is installed at one end of the pull rod (2), the piston assembly (12) is installed in the cylinder body (1), the outer wall of the piston assembly (12) is in contact with the inner wall of the cylinder body (1), and a vent groove (11) is formed in the inner wall of the cylinder body (1) along the length direction of the cylinder body (1); the distance between the first end of the pull rod (2) and the third end of the vent groove (11) needs to be not less than the length of the piston assembly (12), one end of the pull rod (2) entering the cylinder body (1) is a first end, the other end of the cylinder body (1) far away from the first end is a second end, the third end is close to the first end in the two ends of the vent groove (11), the fourth end is the other end, and the second end is aligned with the fourth end; the piston assembly (12) comprises a piston sleeve (5) which expands along with the increase of air pressure, and the outer wall of the piston sleeve (5) is in contact with the inner wall of the cylinder body (1); the outer wall of the piston sleeve (5) is provided with a sealing layer (6) capable of improving the contact performance, the sealing layer (6) is made of soft plastic, and the sealing layer (6) is fixed on the outer surface of the piston sleeve (5) in an adhesion mode.
2. The pneumatic damping cushion according to claim 1, characterized in that the piston sleeve (5) is of a sleeve-like construction open at one end, the piston sleeve (5) being made of an elastic material.
3. A pneumatic damping bumper according to claim 2, characterised in that the piston assembly (12) comprises piston rings (8) which expand with increasing air pressure, the outer walls of the piston rings (8) being in contact with the inner walls of the cylinder (1).
4. a pneumatic damping bumper according to claim 3 characterised in that the piston assembly (12) comprises an upper piston (10) and a lower piston (9), the upper piston (10) being connected to the drawbar (2), the piston sleeve (5) and the piston rings (8) being mounted between the upper piston (10) and the lower piston (9), the bores in the piston sleeve (5), the piston rings (8) and the lower piston (9) communicating with each other.
5. The pneumatic damping cushion according to claim 1, characterized in that the cylinder (1) is provided with an outer cover (7) at one end and an inner cover (13) at the other end.
6. The pneumatic damping bumper as recited in claim 1, characterized in that the cylinder (1) is provided with a sealing ring (3) at the outlet of one end of the inner cover (13), and the pull rod (2) is connected with the piston assembly (12) through the sealing ring (3).
7. the pneumatic damping bumper as claimed in claim 1, characterized in that a pulling cap (4) is mounted at one end of the pull rod (2), and the end of the pulling cap (4) away from the pull rod (2) is spherical.
8. The pneumatic damping cushion according to claim 7, characterized in that the pulling cap (4) is screwed to the pulling rod (2), and the cross section of the vent groove (11) is square.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410320885.3A CN105276057B (en) | 2014-07-04 | 2014-07-04 | Pneumatic damping buffer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410320885.3A CN105276057B (en) | 2014-07-04 | 2014-07-04 | Pneumatic damping buffer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105276057A CN105276057A (en) | 2016-01-27 |
| CN105276057B true CN105276057B (en) | 2019-12-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410320885.3A Active CN105276057B (en) | 2014-07-04 | 2014-07-04 | Pneumatic damping buffer |
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| Country | Link |
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| CN (1) | CN105276057B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107012655B (en) * | 2017-05-25 | 2022-11-04 | 青岛海尔洗衣机有限公司 | Upper cover damper for washing machine, upper cover slow-falling device and washing machine |
| CN111993098A (en) * | 2020-08-28 | 2020-11-27 | 芜湖熠康智能科技有限公司 | Sliding table with movable buffering function |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2526587Y (en) * | 2002-01-25 | 2002-12-18 | 上海永鑫气体弹簧有限公司 | Gas spring |
| CN201021704Y (en) * | 2004-09-17 | 2008-02-13 | 尤利乌斯·布卢姆有限公司 | Flow damper |
| CN201078428Y (en) * | 2007-09-14 | 2008-06-25 | 施与秋 | Damp changeable gas spring |
| CN201110337Y (en) * | 2007-12-05 | 2008-09-03 | 唐善培 | Air pressure type damper |
| CN102405360A (en) * | 2009-04-21 | 2012-04-04 | 异型弹簧有限公司 | Gas cylinder actuator with safety system for controlled ejection of the piston stem |
-
2014
- 2014-07-04 CN CN201410320885.3A patent/CN105276057B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2526587Y (en) * | 2002-01-25 | 2002-12-18 | 上海永鑫气体弹簧有限公司 | Gas spring |
| CN201021704Y (en) * | 2004-09-17 | 2008-02-13 | 尤利乌斯·布卢姆有限公司 | Flow damper |
| CN201078428Y (en) * | 2007-09-14 | 2008-06-25 | 施与秋 | Damp changeable gas spring |
| CN201110337Y (en) * | 2007-12-05 | 2008-09-03 | 唐善培 | Air pressure type damper |
| CN102405360A (en) * | 2009-04-21 | 2012-04-04 | 异型弹簧有限公司 | Gas cylinder actuator with safety system for controlled ejection of the piston stem |
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| Publication number | Publication date |
|---|---|
| CN105276057A (en) | 2016-01-27 |
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Address after: 315318, No. 1518, Yangmei Avenue South Road, Ningbo, Zhejiang, Cixi Applicant after: Ningbo Yusheng Home Technology Co., Ltd. Address before: Meiyuan Village of Henghe town of Cixi city of Zhejiang Province, Ningbo City, 315300 Applicant before: CIXI YUSHUN ELECTRICAL APPLIANCE CO., LTD. |
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