CN109236925B - Gas linear damping type constant-rigidity vibration isolator - Google Patents
Gas linear damping type constant-rigidity vibration isolator Download PDFInfo
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- CN109236925B CN109236925B CN201811140054.2A CN201811140054A CN109236925B CN 109236925 B CN109236925 B CN 109236925B CN 201811140054 A CN201811140054 A CN 201811140054A CN 109236925 B CN109236925 B CN 109236925B
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- piston
- cylinder body
- end cover
- shell
- piston rod
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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
- F16F9/02—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum
- F16F9/0209—Telescopic
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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
- F16F9/50—Special means providing automatic damping adjustment, i.e. self-adjustment of damping by particular sliding movements of a valve element, other than flexions or displacement of valve discs; Special means providing self-adjustment of spring characteristics
Abstract
The invention discloses a gas linear damping type constant-rigidity vibration isolator, and belongs to the field of vibration isolators. The composite piston comprises a shell, end covers A and B arranged at two ends of the shell, and a composite piston module arranged in the shell; the composite piston module comprises a cylinder body, a piston which is arranged in the cylinder body and can freely slide, a piston rod arranged on the piston and a baffle plate arranged on the piston rod; the other end of the piston rod passes through a linear bearing arranged on the end cover B and extends to the outer side of the end cover B; the metal spiral spring is arranged on the piston rod, and two ends of the metal spiral spring are respectively connected with the baffle plate and the end cover B; the cylinder body is a thin-wall cylinder with holes at two ends, one end of the cylinder body is fixedly arranged on the end cover A, and the other end of the cylinder body is arranged in the shell; the chamber inside the cylinder between the piston and end cap a is filled with a compressible gas. The invention relates to a gas damping type linear stiffness vibration isolator with constant stiffness and increased damping.
Description
Technical Field
The invention mainly relates to the field of vibration isolators, in particular to a gas linear damping type constant-rigidity vibration isolator.
Background
Various requirements of precise electronic instruments are higher and higher along with the requirement of the precision of the instruments, although vibration isolators widely used in the prior art have rigidity characteristics and damping characteristics, the rigidity and the damping are generally provided by common structural elements, namely, the vibration isolators and the damping are difficult to meet the requirements of constant rigidity and increased damping of electronic equipment in the transportation process. Therefore, the vibration isolator with constant rigidity and linearly variable damping has important significance.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: aiming at the technical problems in the prior art, the invention provides the gas damping type linear stiffness vibration isolator which adopts gas to provide damping and adopts the metal spiral spring to provide stiffness, the stiffness is constant, and the damping is increased.
In order to solve the problems, the solution proposed by the invention is as follows: the utility model provides a gaseous linear damping formula constant rigidity isolator, includes the shell, install in end cover A and end cover B at shell both ends, install in the compound piston module of shell the inside, its characterized in that:
the composite piston module comprises a cylinder body, a piston which is arranged in the cylinder body and can freely slide, a piston rod which is arranged on the piston, and a baffle plate which is arranged on the piston rod;
the other end of the piston rod passes through a linear bearing arranged on the end cover B and extends to the outer side of the end cover B; the metal spiral spring is arranged on the piston rod, and two ends of the metal spiral spring are respectively connected with the baffle plate and the end cover B;
the cylinder body is a thin-wall cylinder with holes at two ends, one end of the cylinder body is fixedly arranged on the end cover A, and the other end of the cylinder body is arranged in the shell; the chamber inside the cylinder between the piston and the end cap a is filled with a compressible gas.
Compared with the prior art, the invention has the following advantages and beneficial effects:
(1) the gas linear damping type constant-stiffness vibration isolator mainly has the advantages that the metal spiral spring provides stiffness, when the piston deviates from the balance position to a large extent, the metal spiral spring slightly reduces the stiffness due to the softening characteristic, and at the moment, compressed gas provides a small part of stiffness to make up the softening characteristic of the spring, so that the constant-stiffness characteristic is realized; meanwhile, the damping force is adjusted by compressing gas through the piston. Therefore, the gas damping type linear stiffness vibration isolator is simple and reasonable in structure, and has constant stiffness and increased damping.
Drawings
Fig. 1 is a schematic structural principle diagram of a gas linear damping type constant stiffness vibration isolator according to the invention.
In the drawings, 1 — housing; 2-end cap A; 3-end cap B; 4, a cylinder body; 5-a piston rod; 6, a piston; 7, a baffle plate; 8-a metal coil spring; 9-linear bearing.
Detailed Description
The invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1, the gas linear damping type constant stiffness vibration isolator of the present invention comprises a housing 1, end caps a2 and B3 installed at both ends of the housing 1, and a composite piston module installed inside the housing.
Referring to fig. 1, the composite piston module includes a cylinder 4, a piston 6 mounted in the cylinder 4 and capable of sliding freely, a piston rod 5 mounted on the piston 6, and a baffle 7 mounted on the piston rod 5.
Referring to fig. 1, the other end of the piston rod 5 extends to the outside of the end cap B3 through the linear bearing 9 mounted on the end cap B3; and the metal spiral spring 8 is arranged on the piston rod 5, and two ends of the metal spiral spring are respectively connected with the baffle 7 and the end cover B3. Further, the metal coil spring 8 is selected from a general spring having a load-displacement curve with a softening characteristic.
Referring to fig. 1, the cylinder 4 is a thin-walled cylinder with openings at both ends, one end of the cylinder is fixed on the end cover a2, and the other end is arranged inside the housing 1; the chamber inside the cylinder 4 between the piston 6 and the end cap a2 is filled with compressible gas. The magnitude of the damping force is proportional to the volume of the air chamber, i.e. related to the displacement of the piston 6 away from the equilibrium position, so that when the displacement of the piston 6 is large, the stiffness provided by the gas can compensate for the tendency of the load-displacement curve of the metal coil spring 6 to soften, i.e. the non-linearly decreasing stiffness of the metal coil spring 6 plus the stiffness provided by the gas is substantially equal to its initial stiffness, thereby achieving the constant stiffness characteristic.
The working principle is as follows: when the piston rod 5 is acted by external force, the direction of the external force is not set to the left; at the moment, the piston rod 5 moves leftwards relative to the shell 1, the metal spiral spring 8 is stretched and deformed under the action of the baffle 7, and meanwhile, the piston 6 compresses gas in the cylinder 4 leftwards; since the gas compression force is small compared to the force of the metal coil spring 6, it can be ignored. Thus, the stiffness of the entire isolator is provided by the metal coil spring 8 and the damping force is provided by the compressible gas within the cylinder 4.
Claims (1)
1. The utility model provides a gaseous linear damping formula constant rigidity isolator, includes shell (1), install in end cover A (2) and end cover B (3) at shell (1) both ends, install in the compound piston module of shell the inside, its characterized in that:
the composite piston module comprises a cylinder body (4), a piston (6) which is arranged in the cylinder body (4) and can freely slide, a piston rod (5) arranged on the piston (6), and a baffle plate (7) arranged on the piston rod (5);
the other end of the piston rod (5) passes through a linear bearing (9) arranged on the end cover B (3) and extends to the outer side of the end cover B (3); the metal spiral spring (8) is arranged on the piston rod (5), and two ends of the metal spiral spring are respectively connected with the baffle plate (7) and the end cover B (3); the metal spiral spring (8) is a common spring with a load-displacement curve having softening characteristics;
the cylinder body (4) is a thin-wall cylinder with holes at two ends, one end of the cylinder body is fixedly arranged on the end cover A (2), and the other end of the cylinder body is arranged in the shell (1); the chamber inside the cylinder (4) between the piston (6) and the end cap a (2) is filled with a compressible gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811140054.2A CN109236925B (en) | 2018-09-28 | 2018-09-28 | Gas linear damping type constant-rigidity vibration isolator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811140054.2A CN109236925B (en) | 2018-09-28 | 2018-09-28 | Gas linear damping type constant-rigidity vibration isolator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109236925A CN109236925A (en) | 2019-01-18 |
| CN109236925B true CN109236925B (en) | 2020-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811140054.2A Active CN109236925B (en) | 2018-09-28 | 2018-09-28 | Gas linear damping type constant-rigidity vibration isolator |
Country Status (1)
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| CN (1) | CN109236925B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110307282A (en) * | 2019-06-24 | 2019-10-08 | 南京航空航天大学 | Zero nonlinear isolation device of pneumatic standard |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1457157A (en) * | 1921-11-25 | 1923-05-29 | Galbraith Alexander | Pneumatic suspension for wheeled vehicles |
| US4613115A (en) * | 1982-08-30 | 1986-09-23 | Gas Spring Company, Division Of Fichtel & Sachs Industries, Inc. | Temperature compensated gas spring |
| DE4112254A1 (en) * | 1991-04-15 | 1992-10-22 | Stabilus Gmbh | GAS SPRING WITH NON-CONTINUOUS FORCE CHARACTERISTICS |
| CN100504106C (en) * | 2007-09-17 | 2009-06-24 | 上海微电子装备有限公司 | Cylinder piston vibration damping device |
| CN205260709U (en) * | 2016-01-04 | 2016-05-25 | 滁州市盛华机电制造有限公司 | Clutch brake spring |
| CN106678267B (en) * | 2016-11-22 | 2018-08-14 | 常州大学 | A kind of combined shock absorber with three rank intrinsic frequencies |
| CN207795937U (en) * | 2017-05-15 | 2018-08-31 | 扬州福克斯减震器有限公司 | Built-in buffer-type single drum shock absorber |
| CN108119597A (en) * | 2017-12-15 | 2018-06-05 | 常州大学 | A kind of intelligent vibration damper available for resonant belt vibration isolation |
| CN207583922U (en) * | 2017-12-18 | 2018-07-06 | 江西长达减震器有限公司 | A kind of high abrasion automobile absorber |
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2018
- 2018-09-28 CN CN201811140054.2A patent/CN109236925B/en active Active
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| CN109236925A (en) | 2019-01-18 |
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