CN108278292B - Rigidity-variable elastic vibration damper - Google Patents
Rigidity-variable elastic vibration damper Download PDFInfo
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- CN108278292B CN108278292B CN201810193856.3A CN201810193856A CN108278292B CN 108278292 B CN108278292 B CN 108278292B CN 201810193856 A CN201810193856 A CN 201810193856A CN 108278292 B CN108278292 B CN 108278292B
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- plate spring
- base
- spring
- vibration damper
- friction connection
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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
- F16F1/00—Springs
- F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
- F16F1/18—Leaf springs
- F16F1/185—Leaf springs characterised by shape or design of individual leaves
Abstract
The invention discloses a rigidity-variable elastic vibration damper, which comprises: the device comprises a base, a step cylinder, a ratchet mechanism, a friction connection circular ring, a plate spring A, a plate spring B and a return spring; two ends of the ladder cylinder are arranged on the base; the ratchet wheel structure is characterized in that a ratchet wheel is arranged on a stepped cylinder through interference fit, and a pawl is arranged on a base; the friction connection circular ring is tightly pressed and installed on the stepped cylinder through a pretightening force, the friction connection circular ring is fixedly connected with the plate spring A, the other end of the plate spring A bears external load, the lower plate of the friction connection circular ring compresses the reset spring, and the other end of the reset spring is fixed on the base; one end of the plate spring B is fixedly connected with the base, the other end of the plate spring B is provided with a groove-shaped hole, the lower part of the plate spring A bearing an external load end penetrates through the groove-shaped hole, the defect of the traditional elastic vibration damper is overcome, and three sections of different rigidity characteristics can be realized.
Description
Technical Field
The invention relates to the field of mechanical engineering, in particular to a rigidity-variable elastic vibration damper.
Background
The elastic vibration damper is widely applied to various engineering mechanical structures, and the traditional elastic vibration damper can not meet the variable stiffness requirement of actual engineering.
The traditional elastic vibration damper is a transposition consisting of a spiral spring or an elastic sheet, and has the problem that only fixed rigidity can be provided, namely, the displacement of the device is linearly increased along with the external load, and the zero rigidity characteristic that the displacement is increased due to the fact that the external load is unchanged cannot be realized.
Disclosure of Invention
The invention provides a variable-stiffness elastic vibration damper, which solves the defects of the traditional elastic vibration damper, and provides a nonlinear variable-stiffness elastic vibration damper, and can realize zero-stiffness characteristic that the external load is unchanged and the displacement is increased in the vibration damper process. The device can realize three sections of different rigidity characteristics: the first stage is the rigidity characteristic that the displacement linearly increases with the external load, the second stage is the zero rigidity characteristic that the displacement continuously increases with the external load, and the third stage is the rigidity characteristic that the displacement continuously linearly increases with the external load. And it is possible to realize that the elastic damping means can be restored to the starting position when the external load is removed.
The aim of the invention is realized by the following technical scheme: a rigidity-variable elastic vibration damper consists of a base, a stepped cylinder, a ratchet mechanism, a friction connection ring, a plate spring A, a plate spring B and a return spring.
The lower surface of the base is provided with a square bottom with a U-shaped hole, and two sides of one end of the bottom are provided with mounting seats with round holes, so that the connection with the ladder cylinder is realized;
the two ends of the ladder cylinder are symmetrical in structure and are arranged on the base, the two ends of the ladder cylinder are provided with ratchet wheels, and the middle part of the ladder cylinder is provided with a friction connection cylinder;
the ratchet mechanism consists of a ratchet and a pawl, the ratchet is arranged on the ladder cylinder through interference fit, the pawl is arranged on the base, the anticlockwise rotation of the ladder cylinder is limited, and the clockwise rotation is not affected;
the friction connection ring is of a ring structure with two plates, the friction connection ring is installed on the stepped cylinder in a pressing mode through pretightening force, an upper plate opening is fixedly connected with the plate spring A through a bolt, the lower plate compresses the reset spring, and the reset spring force acts when external force is removed;
one end of the plate spring A is provided with a round hole and is fixedly connected with the friction connection cylinder through a bolt, the other end of the plate spring A bears external load, and displacement changes along with the external load;
one end of the plate spring B is provided with a round hole and is fixed on the base through a set screw, the other end of the plate spring B bears the pressure when the plate spring A reaches a certain displacement, and meanwhile, the plate spring B is provided with a groove to limit the horizontal movement of the plate spring A to a certain extent;
the return spring is mounted on the base, and when the external load is removed, the plate spring A and the stepped cylinder are returned to the initial positions through the return spring.
The working principle of the invention is as follows: when the stress end of the plate spring A receives external load, the plate spring A realizes the first section of stiffness characteristic through self elastic deformation at the beginning stage, displacement linearly increases along with the external load, no relative sliding exists between the friction connection circular ring and the ladder cylinder at the moment, and the plate spring A is in a static friction state. When the external load continues to increase, the friction connection ring and the stepped cylinder reach the maximum static friction force, the friction connection ring and the stepped cylinder start sliding, the return spring starts to be compressed, the stiffness of the return spring is relatively smaller, and the displacement of the elastic vibration damper continues to increase due to the fact that the external load is unchanged, and therefore the zero stiffness characteristic of the second stage is achieved. When the leaf spring a displacement reaches a certain amount, it comes into contact with the compression leaf spring B, and the displacement continues to increase linearly with the external load. When the external force is removed, the plate spring and the stepped cylinder return to the original positions due to the action of the return spring.
One or more technical schemes provided by the application have at least the following technical effects or advantages:
1. the invention can realize three sections of elastic vibration reduction with different rigidity characteristics, in particular to zero rigidity characteristics that the external load of the second section is unchanged and the displacement is increased;
2. the invention is composed of mechanical structure, with high reliability and low cost.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and together with the description serve to explain the principle of the invention;
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic view of leaf spring A of the present invention;
FIG. 3 is a schematic view of leaf spring B of the present invention;
FIG. 4 is a schematic view of a friction joint cylinder according to the present invention;
fig. 5 is a top view of a portion of the structural connection of the present invention.
Detailed Description
The invention provides a variable-stiffness elastic vibration damper, which solves the defects of the traditional elastic vibration damper, and provides a nonlinear variable-stiffness elastic vibration damper, and can realize zero-stiffness characteristic that the external load is unchanged and the displacement is increased in the vibration damper process.
In order that the above-recited objects, features and advantages of the present invention will be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description. In addition, the embodiments of the present application and the features in the embodiments may be combined with each other without conflicting with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than within the scope of the description, and the scope of the invention is therefore not limited to the specific embodiments disclosed below.
The invention is described in further detail below with reference to the drawings and the detailed description.
Referring to fig. 1-5, a variable stiffness elastic vibration damper is composed of a base 1, a stepped cylinder 2, a ratchet mechanism 3, a friction connection ring 4, a plate spring A5, a plate spring B6 and a return spring 7.
The lower surface of the base 1 is provided with a square bottom with a U-shaped hole, and two sides of one end of the bottom are provided with mounting seats with round holes, so that the connection with the stepped cylinder 2 is realized;
the two ends of the ladder cylinder 2 are symmetrical in structure and are arranged on the base 1, the two ends of the ladder cylinder are provided with ratchet wheels, and the middle part of the ladder cylinder is provided with a friction connection cylinder 4;
the ratchet mechanism 3 consists of a ratchet and a pawl, the ratchet is arranged on the ladder cylinder 2 through interference fit, the pawl is arranged on the base, the anticlockwise rotation of the ladder cylinder 2 is limited, and the clockwise rotation is not affected;
the friction connection ring 4 is of a ring structure with two plates, is tightly installed on the ladder cylinder 2 through pretightening force, an upper plate opening is fixedly connected with the plate spring A through a bolt, and a lower plate compresses the return spring 7 and is acted by the return spring force when external force is removed;
one end of the plate spring A5 is provided with a round hole and is fixedly connected with the friction connection cylinder 2 through a bolt, the other end of the plate spring A carries external load, and displacement changes along with the external load;
one end of the plate spring B6 is provided with a round hole and is fixed on the base through a set screw, the other end of the plate spring B is used for bearing the pressure when the plate spring A5 reaches a certain displacement, and meanwhile, the plate spring B6 is provided with a groove to limit the horizontal movement of the plate spring A5 to a certain extent;
the return spring 7 is mounted on the base 1, and when the external load is removed, the plate spring A5 and the stepped cylinder 2 are returned to the original positions by the return spring 7.
When the stress end of the plate spring A5 receives external load, the plate spring A5 realizes the first section of stiffness characteristic through self elastic deformation at the beginning stage, displacement linearly increases along with the external load, no relative sliding exists between the friction connection ring 4 and the stepped cylinder 2 at the moment, and the plate spring A5 is in a static friction state, and the stepped cylinder 2 can not rotate anticlockwise because the ratchet wheel is clamped to rotate anticlockwise. When the external load continues to increase, the friction connection ring 4 and the stepped cylinder 2 reach the maximum static friction force, the friction connection ring and the stepped cylinder start sliding, the return spring 7 starts to be compressed, the rigidity of the return spring 7 is relatively small, and the displacement of the elastic vibration damper continues to increase when the external load is unchanged, so that the zero-rigidity characteristic of the second stage is realized. When the leaf spring A5 is displaced by a certain amount, it comes into contact with the compression leaf spring B6, and the displacement continues to increase linearly with the external load. When the external force is removed, the plate spring and the stepped cylinder 2 return to the original position due to the action of the return spring 7.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (8)
1. A variable stiffness elastic vibration damper apparatus, said apparatus comprising:
the device comprises a base (1), a step cylinder (2), a ratchet mechanism (3), a friction connection ring (4), a plate spring A (5), a plate spring B (6) and a return spring (7); wherein, both ends of the ladder cylinder (2) are arranged on the base (1); the ratchet mechanism (3) consists of a ratchet and a pawl, the ratchet is arranged on the stepped cylinder (2) through interference fit, and the pawl is arranged on the base (1); the friction connection circular ring (4) is installed on the stepped cylinder (2) in a pressing mode through a pre-tightening force, the friction connection circular ring (4) is fixedly connected with the plate spring A (5), the other end of the plate spring A (5) bears external load, the friction connection circular ring (4) is provided with a plate compression reset spring (7), and the other end of the reset spring (7) is fixed on the base (1); one end of the plate spring B (6) is fixedly connected with the base (1), the other end of the plate spring B is provided with a groove-shaped hole, and the lower part of the plate spring A (5) bearing an external load passes through the groove-shaped hole.
2. A variable stiffness elastic vibration damper according to claim 1, characterized in that the friction connection ring (4) is mounted in the middle of the stepped cylinder (2) by pre-tightening force compression.
3. The variable stiffness elastic vibration damper according to claim 1, wherein the upper plate of the friction connection ring (4) is provided with a through hole, and is fixedly connected with the plate spring a (5) through a bolt.
4. A variable stiffness elastic vibration damper according to claim 1, wherein one end of the leaf spring B (6) is fixedly connected to the base (1) by a set screw.
5. The variable stiffness elastic vibration damper according to claim 1, wherein the square bottom with a U-shaped hole is arranged below the base (1), and the mounting seats with round holes are arranged on two sides of one end of the bottom.
6. The variable stiffness elastic vibration damper according to claim 1, wherein the stepped cylinder (2) has symmetrical structures at both ends, is mounted on the base (1), has ratchet wheels at both ends, and has a friction connection cylinder in the middle.
7. A variable stiffness elastic damping device according to claim 1, characterized in that the ratchet mechanism (3) limits the counterclockwise rotation of the stepped cylinder (2).
8. The variable-rigidity elastic vibration damper according to claim 1, wherein the friction connection ring (4) is of a ring structure with two plates, is installed on the stepped cylinder (2) in a pressing manner through pretightening force, the upper plate opening is fixedly connected with the plate spring A (5) through a bolt, and the lower plate compresses the return spring (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810193856.3A CN108278292B (en) | 2018-03-09 | 2018-03-09 | Rigidity-variable elastic vibration damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810193856.3A CN108278292B (en) | 2018-03-09 | 2018-03-09 | Rigidity-variable elastic vibration damper |
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| Publication Number | Publication Date |
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| CN108278292A CN108278292A (en) | 2018-07-13 |
| CN108278292B true CN108278292B (en) | 2023-06-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810193856.3A Active CN108278292B (en) | 2018-03-09 | 2018-03-09 | Rigidity-variable elastic vibration damper |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NZ608551A (en) * | 2004-06-16 | 2014-10-31 | Resmed Ltd | Cushion for a respiratory mask assembly |
| CN102009705B (en) * | 2010-11-11 | 2012-11-28 | 西北工业大学 | Self-reset wheel-leg jumping composite mobile robot |
| CN202032027U (en) * | 2011-03-31 | 2011-11-09 | 湖南易通汽车配件科技发展有限公司 | Three-level variable stiffness steel plate spring |
| CA2909549C (en) * | 2013-04-17 | 2018-01-30 | Yingui Sun | Locking apparatus, vehicle safety belt adjustment apparatus, and vehicle safety belt |
| CN106989124A (en) * | 2016-01-21 | 2017-07-28 | 东风汽车悬架弹簧有限公司 | A kind of flat spring structure of variation rigidity |
| CN207921195U (en) * | 2018-03-09 | 2018-09-28 | 成都博仕腾科技有限公司 | A kind of variation rigidity elastic damping structure |
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- 2018-03-09 CN CN201810193856.3A patent/CN108278292B/en active Active
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