CN111734765A - Variable-rigidity rubber damping shock absorber - Google Patents
Variable-rigidity rubber damping shock absorber Download PDFInfo
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- CN111734765A CN111734765A CN202010445736.5A CN202010445736A CN111734765A CN 111734765 A CN111734765 A CN 111734765A CN 202010445736 A CN202010445736 A CN 202010445736A CN 111734765 A CN111734765 A CN 111734765A
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- rubber damping
- damping body
- vibration
- shock absorber
- locking
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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
- F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
- F16F1/38—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers with a sleeve of elastic material between a rigid outer sleeve and a rigid inner sleeve or pin, i.e. bushing-type
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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
- F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
- F16F1/38—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers with a sleeve of elastic material between a rigid outer sleeve and a rigid inner sleeve or pin, i.e. bushing-type
- F16F1/387—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers with a sleeve of elastic material between a rigid outer sleeve and a rigid inner sleeve or pin, i.e. bushing-type comprising means for modifying the rigidity in particular directions
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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
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/08—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with rubber springs ; with springs made of rubber and metal
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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
- F16F2228/066—Variable stiffness
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Vibration Prevention Devices (AREA)
- Springs (AREA)
Abstract
The application relates to the technical field of vibration suppression, specifically discloses a become rigidity rubber damping shock absorber, shock absorber is including the inner skleeve that is equipped with vertical through-hole to and, the cover is established at the outside rubber damping body of inner skleeve, is pressed cover and locking part, wherein: a first extension part horizontally extends from the bottom of the inner sleeve; the rubber damping body is abutted against the first extending part; the pressing sleeve is arranged between the rubber damping body and the locking component; the locking component is fixedly connected with the periphery of the upper end of the inner sleeve. The variable-stiffness rubber damping shock absorber is simple in structure, low in cost, very high in reliability, wide in damping frequency band, good in self-resetting effect, convenient to assemble, disassemble and maintain and the like, overcomes the defect that a passive shock absorption method is narrow in damping frequency band, and also overcomes the defects of high cost, complex structure, large mass and the like of an active shock absorption method.
Description
Technical Field
The invention relates to the technical field of vibration suppression, in particular to a variable-stiffness rubber damping shock absorber.
Background
The large aerospace aircraft parts can often cause the aircraft to generate mechanism vibration due to pose change and speed change in the using process, and the structure dynamics among some aircraft parts generates more severe coupling vibration due to higher and higher requirements on the speed and the load of the aircraft, so that the aircraft parts are not only fatigued and have reduced service life, but also generate noise and even break in severe cases. Therefore, the aerospace vehicle part has the characteristics of complex vibration condition, severe working condition, non-linear vibration and the like.
The shock absorber is widely applied to aerospace vehicles to achieve the purpose of vibration suppression, and the existing scheme comprises a passive mode and an active mode. The traditional passive dynamic vibration absorber generally adopts a linear vibration absorber form, has a simple structure, has obvious vibration suppression performance when the natural frequency is the same as the excitation frequency, has been widely applied to the aspects of aerospace vibration reduction, and has a degraded vibration reduction effect when the excitation frequency changes due to the narrow vibration reduction frequency band range. On the basis of the active mode, the main control force is added, so that the active mode vibration suppression system obtains better broadband vibration suppression performance, but the active mode vibration absorber system has the advantages of large mass, complex structure, high cost, poor reliability and additional energy supply, and is not suitable for aerospace vehicles with tense internal space.
Therefore, the vibration absorber which has the advantages of simple and compact structure, strong universality, strong impact resistance and easy adjustment of the rigidity of the elastic element is obtained to inhibit the vibration of aerospace aircraft parts.
Disclosure of Invention
In order to solve the technical problem, the embodiment of the invention provides a variable-stiffness rubber damping shock absorber.
The utility model provides a become rigidity rubber damping shock absorber, is including the inner skleeve that is equipped with vertical through-hole to and, the rubber damping body, the pressure cover and the locking part of cover external at the inner skleeve are established, wherein:
a first extension part horizontally extends from the bottom of the inner sleeve;
the rubber damping body is abutted against the first extending part;
the pressing sleeve is arranged between the rubber damping body and the locking component;
the locking component is fixedly connected with the periphery of the upper end of the inner sleeve.
Furthermore, the shock absorber also comprises a support which is sleeved on the outer wall surface of the rubber damping body.
Furthermore, an annular groove is formed in the circumferential direction of the outer wall of the rubber damping body, and the support is nested in the annular groove.
Further, the outer edge of the pressing sleeve extends downwards to form a second extending part, and the second extending part is in contact connection with the outer wall of the rubber damping body.
Furthermore, the locking component is fixedly connected with the periphery of the upper end of the inner sleeve in a spiral mode.
Further, the locking component is a round nut with a locking groove.
Furthermore, the shock absorber also comprises a screw, a threaded through hole in the vertical direction is formed in the locking component, and the screw is installed in the threaded through hole.
Further, the vertical through hole is in a step shape.
Furthermore, the cross sections of the inner sleeve, the rubber damping body, the pressing sleeve and the locking component are circular rings.
Further, the rubber damping body is nitrile rubber.
The variable-stiffness rubber damping shock absorber is simple in structure, low in cost and high in reliability, can adjust different stiffness according to the vibration condition of a vibration part in equipment such as an aviation aircraft, has a wider vibration reduction frequency band, has the advantages of good self-resetting effect, convenience in assembly, disassembly and maintenance and the like, makes up the defect of narrow vibration reduction frequency band of a passive vibration absorption method, and also overcomes the defects of high cost, complex structure, large mass and the like of an active vibration absorption method. Meanwhile, the vibration damper can be installed at a plurality of positions of equipment, the vibration damping frequency of the vibration damper is correspondingly adjusted according to the natural frequency of the component, the universality is achieved, the number and the types of spare parts are reduced, and the cost is further reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural view of a variable stiffness rubber damping vibration absorber according to an embodiment of the present invention;
FIG. 2 is a cross-sectional schematic view of a variable stiffness rubber damping vibration absorber according to an embodiment of the present invention;
FIG. 3 is a schematic view of the installation of a variable stiffness rubber damping vibration absorber according to an embodiment of the present invention;
wherein: 1-inner sleeve, 101-first extension, 2-rubber damping body, 3-pressing sleeve, 301-second extension, 4-locking component and 5-support.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, belong to the scope of the present invention.
The invention provides a variable-stiffness rubber damping shock absorber, which comprises an inner sleeve 1 provided with a vertical through hole, a rubber damping body 2 sleeved outside the inner sleeve 1, a pressing sleeve 3 and a locking component 4, as shown in figures 1 and 2, wherein: a first extending part 101 extends horizontally from the bottom of the inner sleeve 1; the rubber damping body 2 abuts against the first extension part 101; the pressing sleeve 3 is arranged between the rubber damping body 2 and the locking component 4; the locking member 4 is fixedly connected to the upper end periphery of the inner sleeve 1. Preferably, the outer peripheral shape of the first extension 101 matches the bottom shape of the rubber damper body 2, and defines the position of the rubber damper body 2.
The rubber damping body 2 in the embodiment of the invention has the characteristics of light weight, high specific strength and high specific modulus, has a series of advantages of fatigue resistance, impact resistance, high damping, strong designability and the like, and is very suitable for a vibration damping scheme. The shock absorber which is made by compounding the rubber damping body 2 and the framework material (the inner sleeve 1, the pressing sleeve 3 and the locking component 4) can eliminate the vibration impact and the transmission of noise generated by a vibration source. In this embodiment, the inner sleeve 1, the pressing sleeve 3 and the locking member 4 are made of metal with certain hardness, such as duralumin. The rubber damping body 2 is made of nitrile rubber, and the nitrile rubber has relatively good damping characteristics, good manufacturability and low cost, and is a choice with high cost performance. Meanwhile, a certain amount of softening agent (such as pine oil softening agent, fatty oil softening agent and the like) is added into the rubber material, so that various compounding agents (such as vulcanizing agent, auxiliary accelerator, flame retardant and the like) can be uniformly distributed, the energy consumption is reduced, and the processing time is shortened. The antioxidant (such as T501, BHT264, antioxidant SP-P, etc.) can be added to improve the antioxidant and antiozonant properties and delay the aging speed. The component of the nitrile rubber is adjusted, so that proper damping can be adjusted, the nitrile rubber can cross a resonance area, and high-frequency vibration and noise are attenuated. The damping ratio is increased along with the improvement of the rubber hardness, generally between 0.05 and 0.15, and the impact stiffness is higher than the static stiffness and the dynamic stiffness, so that the impact deformation is facilitated.
In the embodiment of the invention, the rubber damping body 2, the pressing sleeve 3 and the locking component 4 are all sleeved outside the inner sleeve 1 and are all positioned above the first extension part 101, in order to realize a vibration damping effect, the rubber damping body 2, the pressing sleeve 3, the locking component 4 and the inner sleeve 1 are all in close contact, so that the direct conduction of vibration energy is realized, the rubber damping body 2 is made of rubber and has good deformation performance, when vibration energy is conducted to the variable-stiffness rubber damping vibration absorber of the embodiment, the deformation of the rubber damping body 2 and the friction of each component jointly consume energy, the purpose of vibration damping is realized, and meanwhile, the shock resistance is better.
The locking component 4 is fixedly connected with the periphery of the upper end of the inner sleeve 1, and limits the pressing sleeve 3 and the rubber damping body 2, so that the pressing sleeve 3 and the rubber damping body 2 cannot move in the axial direction of the inner sleeve 1. The deformation of the rubber damper body 2 affects the rigidity thereof, that is, the deformation effect of the rubber damper body 2 between the first extension part 101 and the pressing sleeve 3 is different, so that the rigidity of the whole shock absorber is changed. By adjusting the position of the locking part 4 on the inner sleeve 1, the dimension between the locking part 4 and the first extension 101 can be adjusted, and then the compression effect of the rubber damping body 2 in the space is adjusted, and finally the rigidity change of the shock absorber is realized. Namely, when the frequency of the vibration source is changed, the rigidity adjustment can be realized by directly adjusting the locking part 4 without replacing the rubber damping body 2 or the whole vibration absorber. Different positions at equipment are installed respectively to a plurality of shock absorbers that the structure size is identical, can adopt the not installation of co-altitude in the 1 axis direction of sleeve including locking part 4, the deformation effect of rubber damping body 2 differs in the realization corresponds the shock absorber, realize a plurality of shock absorbers of different rigidity, then through the damping vibration attenuation principle (during solid vibration, make the process of the ability dissipation of solid vibration as far as possible in the damping layer, hinder the object motion promptly, and convert object kinetic energy into other dissipative energy processes), the impact energy of effective absorption vibration object, prevent that the local acceleration of vibration object is too big and damaged. The vibration damper has good vibration damping effect and small volume, and is most suitable for vibration damping of aerospace aircrafts.
The variable-stiffness rubber damping shock absorber is simple in structure, low in cost and high in reliability, can adjust different stiffness according to the vibration condition of a vibration component in equipment such as an aircraft, has a wide vibration reduction frequency band, has the advantages of being good in self-resetting effect, convenient to assemble, disassemble and maintain and the like, makes up the defect that a passive vibration absorption method is narrow in vibration reduction frequency band, and overcomes the defects of high cost, complex structure, large mass and the like of an active vibration absorption method. Meanwhile, the vibration damper can be installed at a plurality of positions of equipment, the vibration damping frequency of the vibration damper is correspondingly adjusted according to the natural frequency of the component, the universality is achieved, the number and the types of spare parts are reduced, and the cost is further reduced.
Specifically, as shown in fig. 1 and fig. 2, the variable-stiffness rubber damping shock absorber according to the embodiment of the invention further includes a support 5, and the support 5 is sleeved on the outer wall surface of the rubber damping body 2. The support 5 is used for fixing the position of the rubber damping body 2, mounting holes are formed in the support 5, and the whole shock absorber is mounted on a part needing damping through the mounting holes. The mounting mode can be selected to be fixed by using a screw, a nut and a washer. Preferably, in order to ensure that the shock absorber has a firm and stable structure in the shock absorption process, an annular groove is formed in the circumferential direction of the outer wall of the rubber damping body 2 in the embodiment, and the support 5 is nested in the annular groove, so that the support 5 hoops the rubber damping body 2. In the embodiment of the invention, partial grooves can be formed on the outer wall of the rubber damping body 2, and convex parts matched with the shape and size of the grooves are designed at the corresponding positions of the support 5 and are matched and fixed with the grooves. The length, width and depth of the groove are not limited in this embodiment, and those skilled in the art can design the groove empirically.
Specifically, as shown in fig. 1 and fig. 2, the outer edge of the pressing sleeve 3 extends downward to form a second extending portion 301, and the second extending portion 301 is in contact connection with the outer wall of the rubber damping body 2. The second extension 301 has a certain covering effect on the rubber damper 2, and affects the deformation of the rubber damper 2. Preferably, the length of the second extension portion 301 in the vertical direction in the present embodiment may be set according to the vibration damping requirement, so that the pressing sleeve 3 having the second extension portion 301 with the corresponding length is selected and assembled according to the installation position of the vibration damper on the equipment, and the vibration damper meeting the vibration damping requirement of the position is formed.
Specifically, the locking member 4 in the embodiment of the present invention is fixedly screwed to the upper end periphery of the inner sleeve 1. The position space of the pressing sleeve 3 and the rubber damping body 2 can be manually adjusted in the screwing process, the locking component 4 is screwed up and down, and the rigidity adjustment of the rubber damping body 2 in the shock absorber is realized. The upper end periphery of the inner sleeve 1 in this embodiment is provided with a section of thread matching the thread provided on the locking means 4, and the locking means 4 in this embodiment may be a round nut. Preferably, the locking component 4 in this embodiment is a round nut with a locking groove, when the locking component 4 is screwed downwards to a predetermined position of the inner sleeve 1, a vertical threaded hole may be formed in the round nut with the locking groove (or called a groove round nut), and the locking component 4 is deformed by screwing downwards through a screw, so as to fix the locking component 4 and the inner sleeve 1, and also to mutually press the rubber damping body 2, the pressing sleeve 3 and the locking component 4, so as to prevent the vibration damping effect from being affected by loosening of the components after long-time vibration. The screw in this embodiment is made of stainless steel or other metal materials with stable performance and high hardness.
Specifically, the inner sleeve 1 in the embodiment of the present invention is provided with a vertical through hole in a step shape, the caliber of the upper end portion is smaller, and the caliber of the lower portion is larger, as shown in fig. 3, in addition to fixing the shock absorber through the support 5, the upper end portion of the inner sleeve 1 can be fixed through a screw, a nut, and a gasket, so that the fixing effect of the shock absorber is better and more stable.
Specifically, as shown in fig. 1 and 3, the inner sleeve 1, the rubber damper 2, the pressing sleeve 3, and the locking member 4 in the embodiment of the present invention have circular cross-sections. The vibration absorber and the vibration source component are installed into a whole through the screw, the nut and the gasket, the whole structure is reasonable in design, the occupied space is small, the structure is simple, the cost is low, the installation and the disassembly are very convenient, and the large-scale production and the manufacturing are convenient; the vibration damper has strong maintainability, can be installed at a corresponding position only by adjusting different damping frequencies in one aerospace aircraft, has universality and reduces the number and the types of spare parts.
It should be noted that "up", "down", "left", "right", "top", "bottom", etc. in the present invention are for convenience of description only, and should not be construed as limiting the essence of the present invention.
The present invention has been further described with reference to the specific embodiments, but it should be understood that the detailed description should not be construed as limiting the spirit and scope of the present invention, and various modifications made to the above embodiments by those skilled in the art after reading the present specification are within the scope of the present invention.
Claims (10)
1. The utility model provides a become rigidity rubber damping shock absorber which characterized in that, including the inner skleeve that is equipped with vertical through-hole to and, the cover is established the outside rubber damping body of inner skleeve, pressure cover and locking part, wherein:
a first extension part horizontally extends from the bottom of the inner sleeve;
the rubber damping body is abutted against the first extending part;
the pressing sleeve is arranged between the rubber damping body and the locking component;
the locking component is fixedly connected with the periphery of the upper end of the inner sleeve.
2. The variable stiffness rubber damping vibration absorber of claim 1 further comprising a pedestal, wherein the pedestal is sleeved on the outer wall surface of the rubber damping body.
3. The variable-stiffness rubber damping absorber as claimed in claim 2, wherein an annular groove is formed in the outer wall of the rubber damping body in the circumferential direction, and the support is nested in the annular groove.
4. The variable stiffness rubber damping snubber of claim 1, wherein the outer edge of the pressure sleeve extends downward to form a second extension, and the second extension is in contact with the outer wall of the rubber damping body.
5. The variable stiffness rubber damping vibration absorber of claim 1 wherein the locking member is threadably secured to the upper peripheral portion of the inner sleeve.
6. The variable stiffness rubber damping shock absorber of claim 1 wherein the locking member is a round nut with a locking groove.
7. The variable stiffness rubber damping vibration absorber of claim 6 further comprising a screw, wherein the locking member has a vertically threaded through hole, and the screw is mounted in the threaded through hole.
8. The variable stiffness rubber damping vibration absorber of claim 1 wherein the vertical through hole is stepped.
9. The variable stiffness rubber damping vibration absorber of claim 1 wherein the cross-section of the inner sleeve, rubber damping body, compression sleeve and locking means is circular.
10. A variable stiffness rubber damping vibration absorber as claimed in claim 1 wherein said rubber damping body is nitrile rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010445736.5A CN111734765A (en) | 2020-05-22 | 2020-05-22 | Variable-rigidity rubber damping shock absorber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010445736.5A CN111734765A (en) | 2020-05-22 | 2020-05-22 | Variable-rigidity rubber damping shock absorber |
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| Publication Number | Publication Date |
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| CN111734765A true CN111734765A (en) | 2020-10-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010445736.5A Pending CN111734765A (en) | 2020-05-22 | 2020-05-22 | Variable-rigidity rubber damping shock absorber |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114321270A (en) * | 2021-11-30 | 2022-04-12 | 湖南航天机电设备与特种材料研究所 | Variable parameter rubber shock absorber for inertial measurement unit |
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| CN202646524U (en) * | 2012-04-27 | 2013-01-02 | 湖北三江航天万峰科技发展有限公司 | Vibration damping device |
| CN204099489U (en) * | 2014-07-21 | 2015-01-14 | 北京自动化控制设备研究所 | A kind of falling-proof type vibration damping equipment |
| CN105840725A (en) * | 2016-05-27 | 2016-08-10 | 江苏远兴环保科技有限公司 | Screw vibration-reduction shock isolator |
| CN107795621A (en) * | 2017-07-13 | 2018-03-13 | 湖南航天天麓新材料检测有限责任公司 | A kind of passive earthquake isolating equipment and its design method |
| CN207864382U (en) * | 2017-09-29 | 2018-09-14 | 贵州新安航空机械有限责任公司 | A kind of stop nut |
| CN208069840U (en) * | 2018-01-31 | 2018-11-09 | 东风商用车有限公司 | Variable-rigidity cab limiting block structure |
| CN108799408A (en) * | 2018-06-22 | 2018-11-13 | 福建省特种设备检验研究院 | A kind of elevator traction machine damper based on metal-rubber |
| DE102017010009A1 (en) * | 2017-10-27 | 2019-05-02 | Jörn GmbH | Elastomer-to-metal bearing |
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2020
- 2020-05-22 CN CN202010445736.5A patent/CN111734765A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202646524U (en) * | 2012-04-27 | 2013-01-02 | 湖北三江航天万峰科技发展有限公司 | Vibration damping device |
| CN204099489U (en) * | 2014-07-21 | 2015-01-14 | 北京自动化控制设备研究所 | A kind of falling-proof type vibration damping equipment |
| CN105840725A (en) * | 2016-05-27 | 2016-08-10 | 江苏远兴环保科技有限公司 | Screw vibration-reduction shock isolator |
| CN107795621A (en) * | 2017-07-13 | 2018-03-13 | 湖南航天天麓新材料检测有限责任公司 | A kind of passive earthquake isolating equipment and its design method |
| CN207864382U (en) * | 2017-09-29 | 2018-09-14 | 贵州新安航空机械有限责任公司 | A kind of stop nut |
| DE102017010009A1 (en) * | 2017-10-27 | 2019-05-02 | Jörn GmbH | Elastomer-to-metal bearing |
| CN208069840U (en) * | 2018-01-31 | 2018-11-09 | 东风商用车有限公司 | Variable-rigidity cab limiting block structure |
| CN108799408A (en) * | 2018-06-22 | 2018-11-13 | 福建省特种设备检验研究院 | A kind of elevator traction machine damper based on metal-rubber |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114321270A (en) * | 2021-11-30 | 2022-04-12 | 湖南航天机电设备与特种材料研究所 | Variable parameter rubber shock absorber for inertial measurement unit |
| CN114321270B (en) * | 2021-11-30 | 2024-05-28 | 湖南航天机电设备与特种材料研究所 | Variable parameter rubber shock absorber for inertial mass |
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Application publication date: 20201002 |