CN112460192B - Vibration exciter noise isolation method - Google Patents
Vibration exciter noise isolation method Download PDFInfo
- Publication number
- CN112460192B CN112460192B CN202011367326.XA CN202011367326A CN112460192B CN 112460192 B CN112460192 B CN 112460192B CN 202011367326 A CN202011367326 A CN 202011367326A CN 112460192 B CN112460192 B CN 112460192B
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- vibration
- vibration exciter
- cavity
- piston
- isolation method
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- 238000002955 isolation Methods 0.000 title claims abstract description 32
- 230000002159 abnormal effect Effects 0.000 claims abstract description 24
- 238000006073 displacement reaction Methods 0.000 claims description 11
- 238000012360 testing method Methods 0.000 abstract description 13
- 230000002238 attenuated effect Effects 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 5
- 239000003292 glue Substances 0.000 description 4
- 238000001179 sorption measurement Methods 0.000 description 4
- 125000006850 spacer group Chemical group 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
Classifications
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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
- F16F15/023—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 fluid means
- F16F15/0232—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 fluid means with at least one gas spring
-
- 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
- F16F15/046—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 using combinations of springs of different kinds
-
- 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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
-
- 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
- F16F2222/00—Special physical effects, e.g. nature of damping effects
- F16F2222/12—Fluid damping
- F16F2222/126—Fluid damping using gases
-
- 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
- F16F2238/00—Type of springs or dampers
- F16F2238/02—Springs
- F16F2238/022—Springs leaf-like, e.g. of thin, planar-like metal
Abstract
The invention relates to the technical field of NVH detection, and particularly discloses a vibration exciter noise isolation method. By adopting the technical scheme, the vibration isolator isolates the high-frequency vibration generated by the vibration exciter through the vibration isolation element, so that the low-frequency vibration signal is transmitted to the tested object and the high-frequency vibration signal is isolated, the high-frequency abnormal sound generated by the vibration exciter to the tested object is greatly attenuated, and the interference of the high-frequency abnormal sound to the abnormal sound test of the tested object is reduced.
Description
Technical Field
The invention relates to the technical field of NVH detection, in particular to a vibration exciter noise isolation method.
Background
NVH is an English abbreviation of noise, vibration and harshness (Noise, vibration, harshness), is a comprehensive problem for measuring automobile manufacturing quality, the NVH problem of a vehicle is one of problems concerned by all large-vehicle manufacturing enterprises and part enterprises in the International automobile industry, statistics show that about 1/3 of the problem of the vehicle has a relation with the NVH problem of the vehicle, and all large companies have about 20% of research and development cost to solve the NVH problem of the vehicle.
At present, the vibration exciter is the most common excitation source in the abnormal sound testing process, and the output shaft of the vibration exciter is connected with the tested object in a bonding mode, so that the vibration exciter can complete the input of a low-frequency signal, and meanwhile, high-frequency vibration can be generated, and structural abnormal sound can be formed between the high-frequency vibration and the tested object, so that the abnormal sound testing of the tested object can be interfered.
Disclosure of Invention
The invention provides a vibration exciter noise isolation method, which aims to solve the problem that abnormal sound test is interfered by structural abnormal sound formed between high-frequency vibration generated by a vibration exciter and a tested object in the prior art.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
according to the vibration exciter noise isolation method, a vibration isolation element is arranged between a vibration exciter and a measured object, and the vibration isolation element can isolate structural abnormal sound formed by high-frequency vibration generated by the vibration exciter on the measured object.
The technical principle and effect of the technical scheme are as follows:
in the scheme, the vibration isolation element isolates the high-frequency vibration generated by the vibration exciter, so that the low-frequency vibration signal is transmitted to the tested object, meanwhile, the high-frequency vibration signal is isolated, the high-frequency abnormal sound generated by the vibration exciter to the tested object is greatly attenuated, and the interference of the high-frequency abnormal sound to the abnormal sound test of the tested object is reduced.
Further, the vibration isolation element comprises an integrally formed rubber pad and a rubber sleeve, the rubber sleeve is in interference fit with an output shaft of the vibration exciter, and the rubber pad is adhered to a measured object.
The beneficial effects are that: the arrangement is convenient for connection and disassembly between the output shaft of the vibration exciter and the vibration isolation element.
Further, a plurality of annular connecting grooves are formed in the inner wall of the rubber sleeve, and the annular connecting grooves are distributed at equal intervals.
The beneficial effects are that: thus, the output shaft of the vibration exciter conveniently enters the rubber sleeve.
Further, a plurality of through rubber grooves are formed in the end face of one side, away from the rubber sleeve, of the rubber pad.
The beneficial effects are that: the setting in glue groove makes when bonding, and glue part can enter into the glue inslot, improves the bonding stability between rubber pad and the measured object.
Further, the cylinder that the rubber pad outside is fixed with the level setting, and the level moves in the cylinder and is connected with the piston, has offered the through-hole on the rubber pad, articulates between the output shaft of piston and vibration exciter has the connecting rod, the connecting rod is located the through-hole, and rubber pad one end is kept away from to the cylinder is fixed with the sucking disc, and the piston is cut apart the cylinder into the first cavity that is close to the output shaft and is kept away from the second cavity of output shaft, is equipped with the first gas pocket of intercommunication first cavity and the second gas pocket of intercommunication second cavity on the cylinder, is equipped with the third gas pocket of intercommunication second cavity and sucking disc on the cylinder, is equipped with the check valve that admits air in the third gas pocket.
The beneficial effects are that: in the scheme, the vibration exciter is directly adsorbed on the surface of a tested object through the sucker, vibration generated by the vibration exciter during testing acts on the tested object through the rubber pad, the cylinder body and the sucker, and the sucker is arranged so as to be convenient for removing the vibration isolation element after abnormal sound testing is finished; in addition, vibration in the horizontal direction generated by the vibration exciter acts on the piston through the connecting rod, so that the piston slides in the horizontal direction, the volume change of the second cavity is realized, gas in the sucker is continuously pumped away, the lower vacuum degree is kept, and the sucker can keep stable adsorption effect while transmitting vibration.
In addition, part of high-frequency vibration generated by an output shaft of the vibration exciter is converted into power of piston movement, so that the high-frequency vibration is further attenuated, and the interference of high-frequency abnormal sound on the abnormal sound test of the tested object is further reduced.
Further, an air outlet one-way valve is arranged in the second air hole.
The beneficial effects are that: thus, when the pressure in the second cavity is reduced, negative pressure is concentrated to the air inlet one-way valve, and the air suction effect of the sucker is improved.
Further, the lower side of the cylinder is fixed with a mounting seat body.
The beneficial effects are that: the setting of mount pad body is in order to prevent to form resonance between piston and the barrel to make the volume change of second cavity unobvious.
Further, the mounting base body comprises an elastic piece and a fixing plate, one end of the elastic piece is connected with the cylinder body, and the other end of the elastic piece is connected with the fixing plate.
The beneficial effects are that: this can reduce vibration transmitted to the fixing plate.
Further, a displacement expanding unit for connecting the connecting rod and the piston is arranged in the first cavity.
The beneficial effects are that: this increases the displacement of the reciprocating piston so that the amplitude of the pressure change in the second chamber increases.
Further, displacement expansion unit includes balancing pole, pull rod and supporting seat, and the supporting seat articulates on the balancing pole, and balancing pole one end is articulated with the connecting rod, and the other end is articulated with the pull rod, and balancing pole one end is kept away from to the pull rod articulates on the piston, and the distance of supporting seat distance pull rod is L1, and the distance of supporting seat distance connecting rod is L2, L1: l2 is not less than 2, is fixed with the support on the barrel inner wall, and the supporting seat is fixed on the support.
The beneficial effects are that: in this scheme the horizontal direction's that the output shaft produced vibration displacement passes through the lever structure that connecting rod, balancing pole and pull rod formed, and the effect is on the piston for single slip displacement of piston increases, and the pressure variation range in the second cavity improves, has further improved the adsorption capacity of second cavity to the interior gas of sucking disc.
Drawings
FIG. 1 is a schematic diagram of a method for isolating noise from vibration exciter according to embodiment 1 of the present invention;
FIG. 2 is a cross-sectional view of a spacer element in embodiment 1 of the vibration isolation method of the present invention;
FIG. 3 is a cross-sectional view of a spacer element in example 2 of the vibration isolation method of the present invention;
fig. 4 is a cross-sectional view of a spacer element in embodiment 3 of the vibration exciter noise isolation method of the present invention.
Detailed Description
The following is a further detailed description of the embodiments:
reference numerals in the drawings of the specification include: the vibration exciter 1, the output shaft 2, the measured object 3, the vibration isolation element 4, the rubber pad 10, the rubber sleeve 11, the connecting groove 12, the rubber groove 13, the cylinder 20, the elastic piece 21, the fixing plate 22, the piston 23, the connecting rod 24, the sucker 25, the first cavity 26, the second cavity 27, the first air hole 28, the air inlet one-way valve 29, the air outlet one-way valve 30, the balance rod 31, the pull rod 32, the supporting seat 33 and the bracket 34.
Example 1 is substantially as shown in figures 1 and 2 of the accompanying drawings:
according to the vibration exciter noise isolation method, the vibration isolation element 4 is arranged between the vibration exciter 1 and the measured object 3, and high-frequency vibration generated by the vibration exciter 1 can form structural abnormal sound with the measured object 3, so that abnormal sound testing of the measured object 3 is affected, and the vibration isolation element 4 can isolate the high-frequency vibration.
The vibration isolation element 4 in this embodiment includes integrated into one piece's rubber pad 10 and rubber sleeve 11, wherein rubber sleeve 11 and vibration exciter 1's output shaft 2 interference fit, a plurality of annular spread grooves 12 have been seted up on rubber sleeve 11's inner wall, a plurality of annular spread grooves 12 equidistant distribution for vibration exciter 1's output shaft 2 better enters into rubber sleeve 11 in, rubber pad 10 is used for bonding on being surveyed object 3, is equipped with a plurality of glue grooves 13 that link up the setting on rubber pad 10's right side terminal surface, in order to improve the bonding stability between rubber pad 10 and the measurand 3.
In this embodiment, the vibration isolation element 4 isolates the high-frequency vibration generated by the vibration exciter 1, so that the low-frequency vibration signal is transmitted to the tested object 3, and the high-frequency vibration signal is isolated, thereby greatly attenuating the high-frequency abnormal sound generated by the vibration exciter 1 to the tested object 3 and reducing the interference of the high-frequency abnormal sound to the abnormal sound test of the tested object 3.
Example 2 is substantially as shown in fig. 3:
the difference from example 1 is that: the outside at rubber pad 10 is fixed with the barrel 20 that the level set up, the left end of barrel 20 is open setting, and the right-hand member of barrel 20 is closed setting, be fixed with the mount pad body in the downside of barrel 20, the mount pad body includes elastic component 21 and fixed plate 22, barrel 20 is connected to one end of elastic component 21, the fixed plate 22 is connected to the other end, elastic component 21 can select spring or attenuator in this embodiment, the level is moved in barrel 20 and is connected with piston 23, the through-hole has been seted up at rubber pad 10 middle part, piston 23 articulates with connecting rod 24 with output shaft 2's top, wherein connecting rod 24 is located the through-hole.
The right-hand member of barrel 20 is fixed with sucking disc 25, and sucking disc 25's opening sets up to the right, and piston 23 cuts apart into barrel 20 and is close to output shaft 2's first cavity 26 and keeps away from output shaft 2's second cavity 27, is equipped with the first gas pocket 28 of intercommunication first cavity 26 and the second gas pocket of intercommunication second cavity 27 on the barrel 20, still is equipped with the third gas pocket at barrel 20's right-hand member, is equipped with air inlet check valve 29 in the third gas pocket, is equipped with air outlet check valve 30 in the second gas pocket.
When the volume in the second cavity 27 is increased and the pressure is reduced, the air inlet check valve 29 is opened, the air in the sucker 25 enters the second cavity 27, and when the volume in the second cavity 27 is reduced and the pressure is increased, the air outlet check valve 30 is opened, and the air in the second cavity 27 is discharged.
In this embodiment, the sucker 25 replaces the mode of bonding to fix the tested object 3 in embodiment 1, and the sucker 25 directly adsorbs the vibration generated by the vibration exciter 1 on the surface of the tested object 3 during testing, and the vibration generated by the vibration exciter 1 acts on the tested object 3 through the rubber pad 10, the cylinder 20 and the sucker 25, so that the sucker 25 is convenient for removing the vibration isolation element 4 after the abnormal sound testing is completed; in addition, vibration in the horizontal direction generated by the output shaft 2 of the vibration exciter 1 acts on the piston 23 through the connecting rod 24, so that the piston 23 slides in the horizontal direction, the volume change of the second cavity 27 is realized, the gas in the sucker 25 is continuously pumped away, the lower vacuum degree is maintained, and the sucker 25 can maintain stable adsorption while transmitting the vibration.
In addition, part of the high-frequency vibration generated by the output shaft 2 of the vibration exciter 1 is converted into power for the movement of the piston 23, so that the high-frequency vibration is further attenuated, and the interference of the high-frequency abnormal sound on the abnormal sound test of the tested object 3 is further reduced.
Example 3 is substantially as shown in fig. 4:
the difference from example 2 is that: the first cavity 26 is internally provided with a displacement expansion unit, wherein the cylinder 20 and the output shaft 2 are eccentrically arranged, namely the central axis of the cylinder 20 and the central axis of the output shaft 2 are not overlapped any more, the displacement expansion unit comprises a balance rod 31, a pull rod 32 and a support seat 33, wherein the support seat 33 is hinged on the balance rod 31, one end of the balance rod 31 is hinged with the connecting rod 24, the other end of the balance rod is hinged with the pull rod 32, one end of the pull rod 32 away from the balance rod 31 is hinged on the piston 23, the distance between the support seat 33 and the pull rod 32 is L1, and the distance between the support seat 33 and the connecting rod 24 is L2 and L1: l2 is not less than 2, a bracket 34 is fixed on the inner wall of the cylinder 20, and a supporting seat 33 is fixed on the bracket 34.
The horizontal vibration displacement generated by the output shaft 2 acts on the piston 23 through the lever structure formed by the connecting rod 24, the balance rod 31 and the pull rod 32, so that the single sliding displacement of the piston 23 is increased, the pressure variation amplitude in the second cavity 27 is improved, and the adsorption capacity of the second cavity 27 to the gas in the sucker 25 is further improved.
The foregoing is merely exemplary embodiments of the present invention, and specific structures and features that are well known in the art are not described in detail herein. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present invention, and these should also be considered as the scope of the present invention, which does not affect the effect of the implementation of the present invention and the utility of the patent. The protection scope of the present application shall be subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.
Claims (6)
1. The vibration exciter noise isolation method is characterized in that: a vibration isolation element is arranged between the vibration exciter and the measured object, and the vibration isolation element can isolate the structural abnormal sound formed by the high-frequency vibration generated by the vibration exciter on the measured object; the vibration isolation element comprises an integrally formed rubber pad and a rubber sleeve, and the rubber sleeve is in interference fit with an output shaft of the vibration exciter; the cylinder body is horizontally arranged and is horizontally connected with the piston, a through hole is formed in the rubber pad, a connecting rod is hinged between the piston and an output shaft of the vibration exciter, the connecting rod is positioned in the through hole, a sucker is fixed at one end of the cylinder body, far away from the rubber pad, of the piston, the cylinder body is divided into a first cavity, close to the output shaft, and a second cavity, far away from the output shaft, by the piston, a first air hole communicated with the first cavity and a second air hole communicated with the second cavity are formed in the cylinder body, a third air hole communicated with the second cavity and the sucker is formed in the cylinder body, and an air inlet one-way valve is arranged in the third air hole; a displacement expanding unit for connecting the connecting rod and the piston is arranged in the first cavity; the displacement expansion unit comprises a balance rod, a pull rod and a supporting seat, wherein the supporting seat is hinged to the balance rod, one end of the balance rod is hinged to the connecting rod, the other end of the balance rod is hinged to the pull rod, one end of the pull rod, far away from the balance rod, is hinged to the piston, the distance between the supporting seat and the pull rod is L1, and the distance between the supporting seat and the connecting rod is L2, and L1: l2 is not less than 2, is fixed with the support on the barrel inner wall, and the supporting seat is fixed on the support.
2. The vibration exciter noise isolation method of claim 1, wherein: the inner wall of the rubber sleeve is provided with a plurality of annular connecting grooves which are distributed at equal intervals.
3. The vibration exciter noise isolation method of claim 1, wherein: a plurality of through rubber grooves are formed in the end face of one side, away from the rubber sleeve, of the rubber pad.
4. The vibration exciter noise isolation method of claim 1, wherein: and an air outlet one-way valve is arranged in the second air hole.
5. The vibration exciter noise isolation method of claim 1, wherein: the lower side of the cylinder body is fixedly provided with a mounting seat body.
6. The vibration exciter noise isolation method of claim 5, wherein: the mounting seat body comprises an elastic piece and a fixing plate, one end of the elastic piece is connected with the cylinder body, and the other end of the elastic piece is connected with the fixing plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011367326.XA CN112460192B (en) | 2020-11-27 | 2020-11-27 | Vibration exciter noise isolation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011367326.XA CN112460192B (en) | 2020-11-27 | 2020-11-27 | Vibration exciter noise isolation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112460192A CN112460192A (en) | 2021-03-09 |
| CN112460192B true CN112460192B (en) | 2024-01-23 |
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ID=74809391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011367326.XA Active CN112460192B (en) | 2020-11-27 | 2020-11-27 | Vibration exciter noise isolation method |
Country Status (1)
| Country | Link |
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| CN (1) | CN112460192B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3088577U (en) * | 2001-12-10 | 2002-09-20 | 渡邊プレス工業株式会社 | Hammering inspection system for mechanical parts |
| JP2010138949A (en) * | 2008-12-09 | 2010-06-24 | Tokai Rubber Ind Ltd | Vibration-proof rubber bushing |
| WO2012086287A1 (en) * | 2010-12-24 | 2012-06-28 | ヤマウチ株式会社 | Vibration absorbing device for washing machine |
| KR20130140472A (en) * | 2012-06-14 | 2013-12-24 | 현대자동차주식회사 | Damper structure of engine mounting bracket |
| CN203864421U (en) * | 2014-05-19 | 2014-10-08 | 江苏友和动力机械有限公司 | Vibration damper for auxiliary power generating system range extender of electric automobile |
| CN106596130A (en) * | 2016-12-20 | 2017-04-26 | 江苏金坛大迈汽车工程研究院有限公司 | Finished automobile noise vibration source detection method and vibration source detection device using same |
| CN108087413A (en) * | 2018-01-25 | 2018-05-29 | 吉林大学 | A kind of blocks rotation formula hydraulic shock-absorption Acetabula device |
| CN209041409U (en) * | 2018-09-07 | 2019-06-28 | 天津烯航石墨烯科技有限公司 | Conical rubber sleeves are used in the hanging of brake clamp unit |
-
2020
- 2020-11-27 CN CN202011367326.XA patent/CN112460192B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3088577U (en) * | 2001-12-10 | 2002-09-20 | 渡邊プレス工業株式会社 | Hammering inspection system for mechanical parts |
| JP2010138949A (en) * | 2008-12-09 | 2010-06-24 | Tokai Rubber Ind Ltd | Vibration-proof rubber bushing |
| WO2012086287A1 (en) * | 2010-12-24 | 2012-06-28 | ヤマウチ株式会社 | Vibration absorbing device for washing machine |
| KR20130140472A (en) * | 2012-06-14 | 2013-12-24 | 현대자동차주식회사 | Damper structure of engine mounting bracket |
| CN203864421U (en) * | 2014-05-19 | 2014-10-08 | 江苏友和动力机械有限公司 | Vibration damper for auxiliary power generating system range extender of electric automobile |
| CN106596130A (en) * | 2016-12-20 | 2017-04-26 | 江苏金坛大迈汽车工程研究院有限公司 | Finished automobile noise vibration source detection method and vibration source detection device using same |
| CN108087413A (en) * | 2018-01-25 | 2018-05-29 | 吉林大学 | A kind of blocks rotation formula hydraulic shock-absorption Acetabula device |
| CN209041409U (en) * | 2018-09-07 | 2019-06-28 | 天津烯航石墨烯科技有限公司 | Conical rubber sleeves are used in the hanging of brake clamp unit |
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| Publication number | Publication date |
|---|---|
| CN112460192A (en) | 2021-03-09 |
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