CN112196935B - Connecting rod moving type active variable damping constant-rigidity vibration isolator - Google Patents
Connecting rod moving type active variable damping constant-rigidity vibration isolator Download PDFInfo
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- CN112196935B CN112196935B CN202011090183.2A CN202011090183A CN112196935B CN 112196935 B CN112196935 B CN 112196935B CN 202011090183 A CN202011090183 A CN 202011090183A CN 112196935 B CN112196935 B CN 112196935B
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- connecting rod
- damping
- sliding ring
- plate
- spring
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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
- F16F13/00—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs
- F16F13/005—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a wound spring and a damper, e.g. a friction damper
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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
- F16F7/00—Vibration-dampers; Shock-absorbers
- F16F7/08—Vibration-dampers; Shock-absorbers with friction surfaces rectilinearly movable along each other
- F16F7/082—Vibration-dampers; Shock-absorbers with friction surfaces rectilinearly movable along each other and characterised by damping force adjustment means
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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
- F16F2228/00—Functional characteristics, e.g. variability, frequency-dependence
- F16F2228/06—Stiffness
Abstract
The invention discloses a connecting rod motion type active variable damping constant-rigidity vibration isolator, and belongs to the field of damping vibration isolators. The device comprises a shell, an upper bottom plate, a lower bottom plate and a cylindrical guide rod, wherein the lower end of the cylindrical guide rod is fixedly arranged on the lower bottom plate and is positioned at the axis position of the shell; the cylindrical guide rod is sequentially provided with a main vibration isolation spring, a lower sliding ring, a fixed ring, an upper sliding ring and a lifting sleeve from bottom to top; the two sides of the upper sliding ring and the lower sliding ring are respectively connected by a connecting rod spring variable damping structure A and a connecting rod spring variable damping structure B; the connecting rod spring variable damping structure A comprises a damping plate A, an upper connecting rod A, a lower connecting rod A and a metal spiral spring A; the connecting rod spring variable damping structure B comprises a damping plate B, an upper connecting rod B, a lower connecting rod B and a metal spiral spring B. The variable damping vibration isolator is simple and reasonable in structure, positive correlation between damping and exciting force is actively realized by means of the motion of the connecting rod, and the rigidity of a system is not influenced by damping change.
Description
Technical Field
The invention mainly relates to the field of damping vibration isolators, in particular to a connecting rod motion type active variable damping constant-rigidity vibration isolator.
Background
With the development of the electronic industry, the requirement for vibration isolation of electronic equipment is higher and higher. The existing widely used vibration isolator is mainly a metal vibration isolator, which has good rigidity characteristic, but usually has smaller damping, and more importantly, the damping force of the metal vibration isolator cannot be actively adjusted. Therefore, the vibration isolator with the damping force positively correlated with the exciting force has important practical value.
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 variable damping vibration isolator which is simple and reasonable in structure, positively correlates damping and exciting force by actively realizing the motion of the connecting rod, and does not influence the rigidity of a system by damping change.
In order to solve the problems, the solution proposed by the invention is as follows: a connecting rod moving type active damping-variable constant-rigidity vibration isolator comprises a shell, an upper bottom plate and a lower bottom plate, wherein the upper bottom plate and the lower bottom plate are respectively arranged at the upper end and the lower end of the shell, and the lower end of a cylindrical guide rod is fixedly arranged on the lower bottom plate and is located at the axis position of the shell.
The cross section of the shell is a rectangular ring; the cylindrical guide rod is sequentially provided with a main vibration isolation spring, a lower sliding ring, a fixed ring, an upper sliding ring and a lifting sleeve from bottom to top; two ends of the main vibration isolation spring are respectively connected with the lower bottom plate and the lower sliding ring; the fixed ring is fixedly arranged on the cylindrical guide rod and is always positioned in the middle of the upper sliding ring and the lower sliding ring; the upper sliding ring and the lower sliding ring can freely slide up and down relative to the cylindrical guide rod; the lifting sleeve can freely slide relative to the cylindrical guide rod, the lower end of the lifting sleeve is connected with the upper end of the upper sliding ring, and the upper end of the lifting sleeve is fixedly provided with an equipment platform for mounting vibration-isolated equipment.
And the two sides of the upper sliding ring and the lower sliding ring are respectively connected by a connecting rod spring variable damping structure A and a connecting rod spring variable damping structure B.
The connecting rod spring variable damping structure A comprises a damping plate A which is always contacted with the inner wall of the shell, an upper connecting rod A of which one end is hinged with the upper sliding ring and the other end is hinged with the middle part of the damping plate A, a lower connecting rod A of which one end is hinged with the lower sliding ring and the other end is hinged with the middle part of the damping plate A, and a metal spiral spring A of which two ends are respectively connected with the middle part of the damping plate A and the fixed circular ring; the damping plate A is an arched metal shell plate which can generate obvious elastic deformation, and one side of the convex surface of the arched metal shell plate is close to the fixed circular ring; the lower end of the upper connecting rod A is hinged with the upper end of the lower connecting rod A.
The connecting rod spring variable damping structure B comprises a damping plate B which is always contacted with the inner wall of the shell, an upper connecting rod B of which one end is hinged with the upper sliding ring and the other end is hinged with the middle part of the damping plate B, a lower connecting rod B of which one end is hinged with the lower sliding ring and the other end is hinged with the middle part of the damping plate B, and a metal spiral spring B of which two ends are respectively connected with the middle part of the damping plate B and the fixed ring; the damping plate B is an arched metal shell plate which can generate obvious elastic deformation, and one side of the convex surface of the arched metal shell plate is close to the fixed circular ring; the lower end of the upper connecting rod B is hinged with the upper end of the lower connecting rod B;
the rigidity of the metal spiral spring A is the same as that of the metal spiral spring B, and the metal spiral spring A and the metal spiral spring B are always in a compressed state; the damping plate A and the damping plate B have the same structure, and the rigidity of the damping plate A is not less than ten times of that of the main vibration isolation spring; the main vibration isolation spring is a tensile and compressive metal spiral spring with constant rigidity.
Compared with the prior art, the invention has the following advantages and beneficial effects: the connecting rod movement type active variable damping constant-stiffness vibration isolator is provided with a connecting rod spring variable damping structure A and a connecting rod spring variable damping structure B, so that when external exciting force or impact force is increased, the relative distance between an upper sliding ring and a lower sliding ring is changed, and the friction damping force of the damping plate A and the damping plate B moving relative to a shell is further increased remarkably; meanwhile, the damping plate is an arched metal shell plate which can generate obvious elastic deformation, so that the contact area of the damping plate and the shell is increased along with the increase of external excitation force or impact force, the elastic deformation of the arched metal shell plate is obviously increased, and certain elastic potential energy is stored so as to restore the initial damping value during reverse motion; in addition, the rigidity of the damping plate is not less than ten times of the rigidity of the main vibration isolation spring, and the rigidity of the whole system is almost equal to the rigidity of the main vibration isolation spring, so the rigidity of the system is not influenced by the change of the damping. Therefore, the variable damping vibration isolator is simple and reasonable in structure, positive correlation between damping and exciting force is actively realized by means of the motion of the connecting rod, and the rigidity of the system is not influenced by the damping change.
Drawings
Fig. 1 is a structural schematic diagram of the connecting rod motion type active variable damping constant stiffness vibration isolator of the invention.
Fig. 2 is a sectional view a-a in fig. 1.
In the figure, 11 — lower base plate; 12-upper base plate; 13-a housing; 21-damping plate a; 22-upper link a; 23-lower link A; 24-metal coil spring a; 31-damping plate B; 32-upper link B; 33-lower link B; 34-metal coil spring B; 4-a cylindrical guide rod; 41-fixed ring; 42 — an upper slip ring; 43 — lower slip ring; 5-main vibration isolation spring; 6, lifting the sleeve; 7-equipment platform.
Detailed Description
The invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 and 2, the constant stiffness vibration isolator with link motion type active damping variation of the present invention comprises a housing 13, an upper bottom plate 12 and a lower bottom plate 11 respectively installed at the upper and lower ends of the housing 13, and a cylindrical guide rod 4 fixedly installed on the lower bottom plate 11 and located at the axial position of the housing 13 at the lower end.
Referring to fig. 1 and 2, the cross section of the housing 13 is a rectangular ring; the cylindrical guide rod 4 is sequentially provided with a main vibration isolation spring 5, a lower sliding ring 43, a fixed ring 41, an upper sliding ring 42 and a lifting sleeve 6 from bottom to top; two ends of the main vibration isolation spring 5 are respectively connected with the lower bottom plate 11 and the lower sliding ring 43; the fixed ring 41 is fixedly arranged on the cylindrical guide rod 4 and is always positioned in the middle of the upper sliding ring 42 and the lower sliding ring 43; the upper sliding ring 42 and the lower sliding ring 43 can freely slide up and down relative to the cylindrical guide rod 4; the lifting sleeve 6 can freely slide relative to the cylindrical guide rod 4, the lower end of the lifting sleeve is connected with the upper end of the upper sliding ring 42, and the upper end of the lifting sleeve is fixedly provided with an equipment platform 7 for installing equipment to be vibration-isolated.
Referring to fig. 1, the upper sliding ring 42 and the lower sliding ring 43 are respectively connected at two sides by a connecting rod spring variable damping structure a and a connecting rod spring variable damping structure B.
Referring to fig. 1 and 2, the link spring variable damping structure a includes a damping plate a21 always contacting the inner wall of the housing 13, an upper link a22 having one end hinged to the upper sliding ring 42 and the other end hinged to the middle of the damping plate a21, a lower link a23 having one end hinged to the lower sliding ring 43 and the other end hinged to the middle of the damping plate a21, and a metal coil spring a24 having two ends respectively connected to the middle of the damping plate a21 and the fixed ring 41; the damping plate A21 is an arched metal shell plate which can generate obvious elastic deformation, and the convex side of the arched metal shell plate is close to the fixed circular ring 41; the lower end of the upper connecting rod A22 is hinged with the upper end of the lower connecting rod A23.
Referring to fig. 1, the link spring variable damping structure B includes a damping plate B31 always contacting the inner wall of the housing 13, an upper link B32 having one end hinged to the upper sliding ring 42 and the other end hinged to the middle of the damping plate B31, a lower link B33 having one end hinged to the lower sliding ring 43 and the other end hinged to the middle of the damping plate B31, and a metal coil spring B34 having both ends connected to the middle of the damping plate B31 and the fixed ring 41, respectively; the damping plate B31 is an arched metal shell plate which can generate obvious elastic deformation, and the convex side of the arched metal shell plate is close to the fixed circular ring 41; the lower end of the upper connecting rod B32 is hinged with the upper end of the lower connecting rod B33.
Referring to fig. 1, the metal coil spring a24 has the same stiffness as the metal coil spring B34 and is always in a compressed state; the damping plate A21 and the damping plate B31 have the same structure, and the rigidity is not less than ten times of the rigidity of the main vibration isolation spring 5; the main vibration isolation spring 5 is a tensile and compressive metal coil spring with constant stiffness.
The principle of positive correlation of damping and exciting force is as follows: when the downward impact force borne by the equipment platform 7 is increased, the upper sliding ring 42 and the lower sliding ring 43 are symmetrical, so that the relative distance between the two is reduced, and the upper connecting rod A22 and the lower connecting rod B33 rotate clockwise, and the upper connecting rod B32 and the lower connecting rod A23 rotate anticlockwise; the damper plate a21 and damper plate B31 increase in pressure, thereby increasing the frictional force of the damper plate a21 and damper plate B31 with respect to the housing 13; therefore, the damping increases in positive correlation when the upper 42 and lower 43 slip rings move downward relative to the cylindrical guide rod 4. In a similar manner, when the downward impact force experienced by the equipment platform 7 is reduced, the frictional forces of the damping plate a21 and the damping plate B31 with respect to the housing 13 are correspondingly reduced. Since the damping plates a21 and B31 are identical in structure and have a rigidity not less than ten times the rigidity of the main vibration isolation springs 5, the distance between the upper and lower slip rings 42 and 43 changes by a much smaller amount than the deformation amount of the main vibration isolation springs 5, and therefore the rigidity of the entire system is almost equal to the rigidity of the main vibration isolation springs 5.
The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through creative efforts should fall within the scope of the present invention.
Claims (1)
1. A connecting rod moving type active damping-variable constant-stiffness vibration isolator comprises a shell (13), an upper bottom plate (12) and a lower bottom plate (11) which are respectively arranged at the upper end and the lower end of the shell (13), and a cylindrical guide rod (4) of which the lower end is fixedly arranged on the lower bottom plate (11) and is positioned at the axis position of the shell (13); the method is characterized in that:
the cross section of the shell (13) is a rectangular ring; the cylindrical guide rod (4) is sequentially provided with a main vibration isolation spring (5), a lower sliding ring (43), a fixed circular ring (41), an upper sliding ring (42) and a lifting sleeve (6) from bottom to top; two ends of the main vibration isolation spring (5) are respectively connected with the lower bottom plate (11) and the lower sliding ring (43); the fixed circular ring (41) is fixedly arranged on the cylindrical guide rod (4) and is always positioned in the middle of the upper sliding ring (42) and the lower sliding ring (43); the upper sliding ring (42) and the lower sliding ring (43) can freely slide up and down relative to the cylindrical guide rod (4); the lifting sleeve (6) can freely slide relative to the cylindrical guide rod (4), the lower end of the lifting sleeve is connected with the upper end of the upper sliding ring (42), and the upper end of the lifting sleeve is fixedly provided with an equipment platform (7) for installing vibration-isolated equipment;
the two sides of the upper sliding ring (42) and the lower sliding ring (43) are respectively connected by a connecting rod spring variable damping structure A and a connecting rod spring variable damping structure B;
the connecting rod spring variable damping structure A comprises a damping plate A (21) which is always in contact with the inner wall of the shell (13), an upper connecting rod A (22) with one end hinged with the upper sliding ring (42) and the other end hinged with the middle part of the damping plate A (21), a lower connecting rod A (23) with one end hinged with the lower sliding ring (43) and the other end hinged with the middle part of the damping plate A (21), and a metal spiral spring A (24) with two ends respectively connected with the middle part of the damping plate A (21) and the fixed ring (41); the damping plate A (21) is an arched metal shell plate which can generate obvious elastic deformation, and one side of the convex surface of the arched metal shell plate is close to the fixed ring (41); the lower end of the upper connecting rod A (22) is hinged with the upper end of the lower connecting rod A (23);
the connecting rod spring variable damping structure B comprises a damping plate B (31) which is always in contact with the inner wall of the shell (13), an upper connecting rod B (32) with one end hinged with the upper sliding ring (42) and the other end hinged with the middle part of the damping plate B (31), a lower connecting rod B (33) with one end hinged with the lower sliding ring (43) and the other end hinged with the middle part of the damping plate B (31), and a metal spiral spring B (34) with two ends respectively connected with the middle part of the damping plate B (31) and the fixed ring (41); the damping plate B (31) is an arched metal shell plate which can generate obvious elastic deformation, and one side of the convex surface of the arched metal shell plate is close to the fixed ring (41); the lower end of the upper connecting rod B (32) is hinged with the upper end of the lower connecting rod B (33);
the rigidity of the metal spiral spring A (24) is the same as that of the metal spiral spring B (34), and the metal spiral spring A and the metal spiral spring B are always in a compressed state; the damping plate A (21) and the damping plate B (31) are identical in structure, and the rigidity of the damping plate A is not less than ten times that of the main vibration isolation spring (5); the main vibration isolation spring (5) is a tensile and compressive metal spiral spring with constant rigidity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011090183.2A CN112196935B (en) | 2020-10-13 | 2020-10-13 | Connecting rod moving type active variable damping constant-rigidity vibration isolator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011090183.2A CN112196935B (en) | 2020-10-13 | 2020-10-13 | Connecting rod moving type active variable damping constant-rigidity vibration isolator |
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| CN112196935A CN112196935A (en) | 2021-01-08 |
| CN112196935B true CN112196935B (en) | 2022-02-25 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113048177B (en) * | 2021-03-15 | 2022-02-22 | 常州大学 | Shock-resistant vibration isolator with damping and rigidity synchronously adjusted |
| CN113074205B (en) * | 2021-03-23 | 2022-02-22 | 常州大学 | Metal vibration isolator with unidirectional motion damping |
| CN113323990B (en) * | 2021-06-29 | 2022-02-22 | 常州大学 | Metal vibration isolator with parabolic relation between load and displacement |
| CN113464597B (en) * | 2021-08-02 | 2022-09-16 | 常州大学 | Variable damping force metal vibration isolator with rigidity decoupling function and damping decoupling function |
| CN113606279B (en) * | 2021-10-09 | 2021-12-07 | 溧阳常大技术转移中心有限公司 | Vibration damper with alternating damping |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1266398C (en) * | 2003-04-11 | 2006-07-26 | 哈尔滨工业大学 | Non linear dry friction damping shock absorber |
| WO2007031611A1 (en) * | 2005-09-15 | 2007-03-22 | Etienne Lacroix Tous Artifices S.A. | Damping device with adaptable friction |
| CN102873494B (en) * | 2012-09-25 | 2015-07-08 | 内蒙古航天红岗机械有限公司 | Umbrella-type inner support clamp for annular welding of elongated cylindrical workpieces |
| CN103267078A (en) * | 2013-06-06 | 2013-08-28 | 南京捷诺环境技术有限公司 | Composite spring damping adjustable vibration isolator |
| CN104930100B (en) * | 2015-06-14 | 2017-05-31 | 中国电子科技集团公司第十研究所 | High-effect dry-friction damping spring vibration-isolator |
| CN105598631B (en) * | 2016-03-25 | 2017-09-22 | 上海普睿玛智能科技有限公司 | Rhombus inner support clamp is used in a kind of pipe welding |
| CN111649087B (en) * | 2020-06-05 | 2022-05-10 | 中国电子科技集团公司第三十六研究所 | Variable friction damping vibration isolator with adjustable central position |
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