CN103104644A - High dynamic stiffness-static stiffness ratio rubber shock absorber used in high speed train - Google Patents
High dynamic stiffness-static stiffness ratio rubber shock absorber used in high speed train Download PDFInfo
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- CN103104644A CN103104644A CN2013100614070A CN201310061407A CN103104644A CN 103104644 A CN103104644 A CN 103104644A CN 2013100614070 A CN2013100614070 A CN 2013100614070A CN 201310061407 A CN201310061407 A CN 201310061407A CN 103104644 A CN103104644 A CN 103104644A
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Abstract
The invention discloses a high dynamic stiffness-static stiffness ratio rubber shock absorber used in a high speed train. The high dynamic stiffness-static stiffness ratio rubber shock absorber used in the high speed train comprises a metal cover, a metal pin bush and a vulcanized rubber layer. The vulcanized rubber layer is attached between the metal cover and the metal pin bush. The cross section of the inner wall of the metal cover is an inclined plane. The cross section of the inner wall of the metal pin bush is an inclined plane. The vulcanized rubber layer is an annular cone. The shock absorber can obtain different stiffness performances by adjusting the degree of the inclined angle of the cross section of the inner wall of the metal cover. Due to the fact that the vulcanized rubber layer is of a uniform thickness structure, influence on service life of the shock absorber caused by larger local stress is avoided when the shock absorber is used. The high dynamic stiffness-static stiffness ratio rubber shock absorber has a larger dynamic stiffness and a smaller static stiffness and can perform the function of shock isolation, noise reduction and shock attenuation well.
Description
Technical field
The present invention relates to a kind of damper components of using of being applicable in the suspension equipment system of dither, be specifically related to a kind of rubber elasticity vibration damper that is mainly used in bullet train suspension type electrical equipment, be specially adapted to the suspension equipment system of dither, simultaneously also go for belonging to mechanical engineering technical field on engineering mechanical device.
Background technique
The high-speed train body bottom is equipped with many key function equipment usually, as transformer and cooling unit, storage battery and lead the equipment such as current transformer, this kind equipment self will produce the dither greater than 50Hz when normal operation, particularly when startup its natural frequency of vibration up to 100Hz.Many similar devices adopt the bolt mode that is rigidly connected directly be connected with car body and fix usually, although this Placement has the installation simple and convenient, lower-cost advantage, but some shortcomings are also arranged simultaneously, bolt connecting mode is without any effectiveness in vibration suppression, will cause damage of facilities to lose efficacy when amplitude surpasses the maximum amplitude that equipment can bear; And will produce resonance phenomenon when the eigentone of vibration equipment frequency and whole system is consistent, and greatly increase amplitude, whole system is produced greatly destroy, produce simultaneously larger noise.This just needs a kind of new parts to replace bolt connection device and car body, and the amplitude of can decaying protection equipment can be kept away to produce and exempt from resonance phenomenon simultaneously.Therefore these parts need to have less quiet rigidity, guarantee good vibration-damping function, the equipment of the amplitude of relaxation equipment generation of vibration protection greatly; These parts need to have larger dynamic stiffness simultaneously, can change greatly system frequency, avoid producing resonance phenomenon (also claiming vibration isolation), protective system.But the quiet rigidity of these parts can not be too little, and quiet rigidity too young pathbreaker causes system's unstability; The dynamic stiffness of these parts can not be too large simultaneously, dynamic stiffness too the complete limiting device of senior general vibration and cause service life of equipment too short.And the ratio of the dynamic stiffness of General Purpose Rubber vibration damper and quiet rigidity is usually in 1.1 ~ 1.6 left and right, and dynamic stiffness value and quiet rigidity value difference are little, can't satisfy simultaneously vibration insulation and noise reduction and vibration-damping function.Therefore need a kind of new rubber shock absorber of design, the springrate ratio of this rubber shock absorber guarantees good vibration insulation and noise reduction and vibration-damping function in 3 ~ 5 left and right.
Development along with the rolling stock technology, the particularly development of High-sped Trains, the working strength of car external equipment and requirement are more and more higher, need vehicle hanging spare to satisfy better the dynamics requirement of vehicle, performance requirement to rubber shock absorber is also more and more higher, when requiring the existing vibration isolation of vibration damper (avoid resonance) decrease of noise functions and have simultaneously preferably effectiveness in vibration suppression, just need a kind of new rubber shock absorber realize this functional requirement.
Summary of the invention
The objective of the invention is to propose a kind of high springrate ratio for above-mentioned technical problem, have good vibration insulation and noise reduction and the rubber shock absorber of vibration-damping function.
The present invention solves the problems of the technologies described above the technological scheme that adopts: a kind of for the high springrate ratio rubber shock absorber of bullet train, and comprise metal-coating, metallic pin cover and be bonded in vulcanized rubber layer between metal-coating and metal guide; Be provided with four mounting holes on four jiaos of described metal-coatings; Described metal-coating cross section of inboard wall is a plane of inclination, and described metal guide cross section of inboard wall is a plane of inclination, and the angular dimension at the tilt angle of described metal-coating cross section of inboard wall is identical with the angular dimension at the tilt angle of described metal guide cross section of inboard wall; Described vulcanized rubber layer is the ring cone, and the angular dimension of the cone angle of described vulcanized rubber layer is identical with the angular dimension at the tilt angle of described metal-coating cross section of inboard wall; Adjust the angular dimension at the tilt angle of described metal-coating cross section of inboard wall, rubber shock absorber can obtain different rigidity properties; The angular dimension at the tilt angle of the angular dimension at the tilt angle of described metal-coating cross section of inboard wall and described metal guide external wall cross-section equates, guaranteed that described vulcanized rubber layer is to wait thick structure, avoid vibration damper in use to affect the working life of vibration damper because localized stress is excessive, rubber shock absorber adopts said structure to have larger dynamic stiffness and less quiet rigidity, can realize good vibration insulation and noise reduction and vibration-damping function.
As a further improvement on the present invention, the rubber that described vulcanized rubber layer uses adopts butadiene and the fine copolymer nitrile rubber of propylene, through mixing and freshening pre-shaping operation, guarantee that rubber shock absorber has high-temperature stability, rubber shock absorber can be worked under 100 ℃ of high temperature for a long time.
As a further improvement on the present invention, the thickness of described vulcanized rubber layer and cone angle determine the rubber shock absorber stiffness characteristics on (user to) in the vertical direction, the thickness of described vulcanized rubber layer and the numerical value of cone angle are larger, and rubber shock absorber rigidity in vertical direction is less; The number range of the thickness of described vulcanized rubber layer is 5mm ~ 25mm; The number range of the cone angle of described vulcanized rubber layer is: 45 ° ~ 75 °; The size of the thickness by adjusting described vulcanized rubber layer or the size of cone angle, rubber shock absorber can obtain different vertical stiffnesses in vertical direction, to satisfy the performance requirement of different use occasions.
As a further improvement on the present invention, the thickness of described vulcanized rubber layer is 19mm, and the cone angle of described vulcanized rubber layer is 73 °.
As a further improvement on the present invention, the transverse holes of four described mounting holes is asymmetric design apart from unequal with the longitudinal hole distance, has when mounted anti-misloading function, guarantees correctly quick mounting of rubber shock absorber, increases work efficiency.
As a further improvement on the present invention, be provided with certain height difference between bottom described metal-coating bottom and metal guide, the largest deformation amount that is used for the restriction rubber shock absorber, prevent that simultaneously the equipment that rubber shock absorber connects from coming off from car body, eliminates safe hidden trouble after rubber shock absorber loses efficacy; Height difference between bottom described metal-coating bottom and metal guide must be greater than the ratio of Maximal shock load and rigidity, and namely vibration damper still has deformation space under Maximal shock load, namely still has effectiveness in vibration suppression; Height difference between bottom simultaneously described metal-coating bottom and metal guide should be less than the thickness of described vulcanized rubber layer.
As a further improvement on the present invention, the height difference between bottom described metal-coating bottom and described metal guide is 14mm.
As a further improvement on the present invention, described vulcanized rubber layer offers two through holes in the symmetrical position that is set to 90 ° of directions with horizontal position along the cone angle direction of vulcanized rubber layer, and namely the angular dimension at the tilt angle of described through hole is identical with the angular dimension at the tilt angle of described metal-coating cross section of inboard wall; Described through hole is used for regulating the lateral stiffness that reduces rubber shock absorber, makes rubber shock absorber have different stiffness characteristics at longitudinal direction and horizontal direction, satisfies the dynamics of vehicle requirement.
As a further improvement on the present invention, the cross section of described through hole is a waist hole, can regulate the lateral stiffness of rubber shock absorber by the size of regulating described through hole, and then realize rubber shock absorber at longitudinal direction and have in a lateral direction different rigidity properties, to satisfy the dynamics of vehicle requirement, wide in the cross section of through hole of growing up of the cross section of described through hole, half of the wide thickness less than described vulcanized rubber layer of the cross section of described through hole.
As a further improvement on the present invention, the length of the cross section of described through hole and wide numerical relation are: L=2R+8mm(L represents the length of the cross section of described through hole, and R represents cross section wide of described through hole).
As a further improvement on the present invention, the length of the cross section of described through hole is 18mm,, the wide of the cross section of described through hole is 5mm.
The present invention has larger dynamic stiffness and less quiet rigidity, and springrate ratio is high springrate ratio rubber shock absorber in 3 ~ 5 left and right, can realize vibration insulation and noise reduction and good vibration-damping function preferably; The vulcanized rubber layer is the uniform thickness structural design, can avoid localized stress in the vibration damper using process excessive and affect working life of vibration damper; Two via design offering on annular cone rubber can reduce lateral stiffness, make vibration damper have different stiffness characteristics at longitudinal direction and horizontal direction, and the vibration damper lateral stiffness is little, and longitudinal rigidity is large, satisfies the dynamics of vehicle requirement; The asymmetric design of four mounting holes, the designed horizontal direction of assurance vibration damper can correctly be installed; Metal-coating bottom and the height difference design of metal guide bottom can either limit the maximum variable of vibration damper, also can prevent simultaneously the risk that defective shock absorber institute connection device comes off from car body; The rubber of sulfuration adopts special process to process, has high-temperature stability, this rubber shock absorber can be used for surpassing the working environment of 100 ℃ for a long time, therefore be a kind of rubber shock-absorbing product of high comprehensive performance, can be widely used in the suspension equipment system and Other Engineering machinery of the dithers such as bullet train suspension type electrical equipment.
Description of drawings
Fig. 1 is cross-sectional view of the present invention;
Fig. 2 is plan structure schematic diagram of the present invention;
Fig. 3 is the metal-coating cross-sectional view;
Fig. 4 is metal guide generalized section.
In figure: 1. metal-coating, 2. vulcanized rubber layer, 3. metal guide, 4. through hole, 5. mounting hole, α. the angle at the tilt angle of metal-coating cross section of inboard wall, d1. transverse holes distance, d2. longitudinal hole distance, D. vulcanized rubber layer thickness, H. the height difference between bottom metal-coating bottom and metal guide, the length of L. through hole cross section, the width of R. through hole cross section.
Embodiment
In order to be illustrated more clearly in the technological scheme of the embodiment of the present invention, during the below will describe embodiment, the accompanying drawing of required use is done to introduce simply, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
As shown in drawings, a kind of for the high springrate ratio rubber shock absorber of bullet train, comprise metal-coating 1, metal guide 3 and be bonded in metal-coating 1 and metal guide 3 between vulcanized rubber layer 2; Be provided with four identical mounting holes 5 of diameter on 1 four jiaos of metal-coatings, transverse holes between four mounting holes 5 is apart from (being d1 ≠ d2), be asymmetric design, having when mounted anti-misloading function apart from unequal with longitudinal hole, guarantee correctly quick mounting of rubber shock absorber, improved working efficiency; Metal-coating 1 cross section of inboard wall is a plane of inclination; Metal guide 3 outer wall cross section of inboard wall are a plane of inclination, the angular dimension at the tilt angle of metal-coating 1 cross section of inboard wall is identical with the angular dimension at the tilt angle of metal guide cross section of inboard wall, guaranteed that vulcanized rubber layer 2 is for waiting thick structure, avoid localized stress in the vibration damper using process excessive and affect working life of vibration damper, the angular dimension at the tilt angle of metal-coating 1 cross section of inboard wall is 73 °, certainly, in other embodiments, the angular dimension at the tilt angle of metal-coating 1 cross section of inboard wall can also be the arbitrary value between 45 ° ~ 75 °; Vulcanized rubber layer 2 is the ring cone, the angular dimension of the cone angle of vulcanized rubber layer 2 is identical with the angular dimension at the tilt angle of metal-coating 1 cross section of inboard wall, the thickness of vulcanized rubber layer 2 is 19mm, certainly, in other embodiments, the size of the thickness of vulcanized rubber layer 2 can also be the arbitrary value between 5mm ~ 25mm; The thickness of vulcanized rubber layer 2 and the size of cone angle can be adjusted variation by rigidity property desired according to rubber shock absorber, to satisfy the requirement of different service conditions; Be provided with certain height difference between metal-coating 1 bottom and metal guide 3 bottoms, be used for the largest deformation amount of restriction rubber shock absorber, prevent that simultaneously the equipment that rubber shock absorber connects from coming off from car body, eliminates safe hidden trouble after rubber shock absorber loses efficacy; Between metal-coating 1 bottom and metal guide 3 bottoms height difference must be greater than the ratio of Maximal shock load and rigidity, namely vibration damper still has deformation space under Maximal shock load, has effectiveness in vibration suppression; Simultaneously the height difference between metal-coating 1 bottom and metal guide 3 bottoms should (be H＜D) less than the thickness of vulcanized rubber layer 2, the height difference of the bottom between metal-coating 1 bottom and metal guide 3 is 14mm, certainly, in other embodiments, the height extent of the bottom between metal-coating 1 bottom and metal guide 3 can also be the arbitrary value between 5mm ~ 25mm.Adopt the rubber shock absorber of said structure to have larger dynamic stiffness and less quiet rigidity, springrate ratio is high springrate ratio rubber shock absorber in 3 ~ 5 left and right, can realize vibration insulation and noise reduction and good vibration-damping function preferably; Vulcanized rubber layer 2 is the uniform thickness structural design, can avoid localized stress in the vibration damper using process excessive and affect working life of vibration damper; Two through holes, 4 designs of offering on annular cone rubber can reduce lateral stiffness, make vibration damper have different stiffness characteristics at longitudinal direction and horizontal direction, and the vibration damper lateral stiffness is little, and longitudinal rigidity is large, satisfies the dynamics of vehicle requirement; The asymmetric design of four mounting holes 5, the designed horizontal direction of assurance vibration damper can correctly be installed; The height difference design of metal-coating 1 bottom and metal guide 3 bottoms can either limit the maximum variable of vibration damper, also can prevent simultaneously the risk that defective shock absorber institute connection device comes off from car body; The rubber of sulfuration adopts special process to process, has high-temperature stability, this rubber shock absorber can work under 100 ℃ of high temperature for a long time, therefore be a kind of rubber shock-absorbing product of high comprehensive performance, can be widely used in the suspension equipment system and Other Engineering machinery of the dithers such as bullet train suspension type electrical equipment.
embodiment two: be to offer two through holes 4 in the symmetrical position that is set to 90 ° of directions with horizontal position along the inclination direction of vulcanized rubber layer 2 at vulcanized rubber layer 2 with embodiment one difference, the angular dimension at tilt angle that is through hole 4 is identical with the angular dimension at the tilt angle of metal-coating 1 cross section of inboard wall, the effect of offering through hole 4 is to regulate the lateral stiffness that reduces rubber shock absorber, make the rubber shock absorber lateral stiffness little, longitudinal rigidity is large, and then rubber shock absorber has different stiffness characteristics at longitudinal direction and horizontal direction, satisfy the dynamics of vehicle requirement, the cross section of through hole 4 is waist holes, can regulate the lateral stiffness of rubber shock absorber by the size of regulating through hole 4, and then realize rubber shock absorber at longitudinal direction and have in a lateral direction different rigidity properties, satisfy the dynamics of vehicle requirement, growing up in wide (be L〉R) of the cross section of through hole 4, half of the wide thickness less than vulcanized rubber layer 2 of the cross section of through hole 4 (is R＜D/2), in the present embodiment, the length of the cross section of through hole 4 is 18mm, wide is 5mm, certainly, in other embodiments, the wide size of the cross section of the length of the cross section of through hole 4 and through hole 4 can also be to satisfy other numerical value of aforementioned condition.
Embodiment three: be that with embodiment two difference the length of cross section of through hole 4 and wide numerical relation are the length that L=2R+8mm(L represents the cross section of described through hole, R represents cross section wide of described through hole), in the present embodiment, the length of the cross section of through hole 4 is 16mm, the wide of the cross section of through hole 4 is 4mm, certainly, in other embodiments, the wide size of the cross section of the length of the cross section of through hole 4 and through hole 4 can also be to satisfy other numerical value of aforementioned condition.
The above is only the preferred embodiment of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. one kind is used for the high springrate ratio rubber shock absorber of bullet train, it is characterized in that: comprise metal-coating, metallic pin cover and be bonded in vulcanized rubber layer between metal-coating and metal guide; Be provided with four mounting holes on four jiaos of described metal-coatings; Described metal-coating cross section of inboard wall is a plane of inclination, and described metal guide cross section of inboard wall is a plane of inclination, and the angular dimension at the tilt angle of described metal-coating cross section of inboard wall is identical with the angular dimension at the tilt angle of described metal guide cross section of inboard wall; Described vulcanized rubber layer is the ring cone, and the angular dimension of the cone angle of described vulcanized rubber layer is identical with the angular dimension at the tilt angle of described metal-coating cross section of inboard wall; Adjust the angular dimension at the tilt angle of described metal-coating cross section of inboard wall, rubber shock absorber can obtain different rigidity properties; The angular dimension at the tilt angle in the angular dimension at the tilt angle of described metal-coating inner wall section and described metal guide outer wall cross section equates, guaranteed that described vulcanized rubber layer is to wait thick structure, avoid vibration damper in use to affect the working life of vibration damper because localized stress is excessive, rubber shock absorber adopts said structure to have larger dynamic stiffness and less quiet rigidity, can realize good vibration insulation and noise reduction and vibration-damping function.
2. as claimed in claim 1 a kind of for the high springrate ratio rubber shock absorber of bullet train, it is characterized in that: the rubber that described vulcanized rubber layer uses adopts butadiene and the fine copolymer nitrile rubber of propylene, through mixing and freshening pre-shaping operation, guarantee that rubber shock absorber has high-temperature stability, vibration damper can be worked under 100 ℃ of high temperature for a long time.
3. as claimed in claim 1 a kind of for the high springrate ratio rubber shock absorber of bullet train, it is characterized in that:, the thickness of described vulcanized rubber layer and cone angle determine the rubber shock absorber stiffness characteristics on (user to) in the vertical direction, the thickness of described vulcanized rubber layer and the numerical value of cone angle are larger, and rubber shock absorber rigidity in vertical direction is less; The number range of the thickness of described vulcanized rubber layer is 5mm ~ 25mm; The number range of the cone angle of described vulcanized rubber layer is: 45 ° ~ 75 °; The size of the thickness by adjusting described vulcanized rubber layer or the size of cone angle, rubber shock absorber can obtain different vertical stiffnesses in vertical direction, to satisfy the performance requirement of different use occasions.
4. as claim 1, claimed in claim 3 a kind of for the high springrate ratio rubber shock absorber of bullet train, it is characterized in that: the thickness of described vulcanized rubber layer is 19mm, and the cone angle of described vulcanized rubber layer is 73 °.
5. as claimed in claim 1 a kind of for the high springrate ratio rubber shock absorber of bullet train, it is characterized in that: the transverse holes of four described mounting holes is apart from unequal with the longitudinal hole distance, be asymmetric design, has when mounted anti-misloading function, guarantee correctly quick mounting of rubber shock absorber, increase work efficiency.
6. as claimed in claim 1 a kind of for the high springrate ratio rubber shock absorber of bullet train, it is characterized in that: be provided with certain height difference between bottom described metal-coating bottom and metal guide, the largest deformation amount that is used for the restriction rubber shock absorber, prevent that simultaneously the equipment that rubber shock absorber connects from coming off from car body, eliminates safe hidden trouble after rubber shock absorber loses efficacy; Height difference between bottom described metal-coating bottom and metal guide must be greater than the ratio of Maximal shock load and rigidity, and namely vibration damper still has deformation space under Maximal shock load, namely still has effectiveness in vibration suppression; Height difference between bottom simultaneously described metal-coating bottom and metal guide should be less than the thickness of described vulcanized rubber layer.
7. as claimed in claim 6 a kind of for the high springrate ratio rubber shock absorber of bullet train, it is characterized in that: the height difference between bottom described metal-coating bottom and described metal guide is 14mm.
8. as claimed in claim 1 a kind of for the high springrate ratio rubber shock absorber of bullet train, it is characterized in that: described vulcanized rubber layer offers two through holes in the symmetrical position that is set to 90 ° of directions with horizontal position along the cone angle direction of vulcanized rubber layer, and namely the angular dimension at the tilt angle of described through hole is identical with the angular dimension at the tilt angle of described metal-coating cross section of inboard wall; The effect of offering described through hole is to regulate the lateral stiffness that reduces rubber shock absorber, makes rubber shock absorber have different stiffness characteristics at longitudinal direction and horizontal direction, satisfies the dynamics of vehicle requirement.
9. as claimed in claim 8 a kind of for the high springrate ratio rubber shock absorber of bullet train, it is characterized in that: the cross section of described through hole is a waist hole, can regulate the lateral stiffness of rubber shock absorber by the size of regulating described through hole, and then realize rubber shock absorber at longitudinal direction and have in a lateral direction different rigidity properties, to satisfy the dynamics of vehicle requirement, wide in the cross section of through hole of growing up of the cross section of described through hole, half of the wide thickness less than described vulcanized rubber layer of the cross section of described through hole.
10. as claimed in claim 9 a kind of for the high springrate ratio rubber shock absorber of bullet train, it is characterized in that: the length of the cross section of described through hole and wide numerical relation are: L=2R+8mm(L represents the length of the cross section of described through hole, R represents cross section wide of described through hole), the length of the cross section of described through hole is 18mm, and the wide of the cross section of through hole is 5mm.
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| CN201310061407.0A CN103104644B (en) | 2013-02-27 | 2013-02-27 | A kind of for bullet train height springrate ratio rubber shock absorber |
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| CN201310061407.0A CN103104644B (en) | 2013-02-27 | 2013-02-27 | A kind of for bullet train height springrate ratio rubber shock absorber |
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Cited By (5)
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| CN108150574A (en) * | 2018-01-23 | 2018-06-12 | 西南交通大学 | A kind of adjustable rubber shock absorber of rigidity |
| CN109778604A (en) * | 2019-03-07 | 2019-05-21 | 安徽神剑科技股份有限公司 | A kind of bilayer nonlinear vibration reduction fastener lasso |
| CN110735881A (en) * | 2019-09-06 | 2020-01-31 | 株洲时代新材料科技股份有限公司 | Rigidity adjusting method of liquid composite spring |
| CN115929842A (en) * | 2023-01-05 | 2023-04-07 | 株洲时代瑞唯减振装备有限公司 | Vibration reduction method for driving motor of metro vehicle and composite vibration reduction mounting pad |
| US12049935B2 (en) | 2019-09-06 | 2024-07-30 | Zhuzhou Times New Material Technology Co., Ltd | Liquid composite spring and method for adjusting stiffness and damping property thereof |
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| CN109778604B (en) * | 2019-03-07 | 2024-03-08 | 安徽神剑科技股份有限公司 | Ferrule for double-layer nonlinear vibration reduction fastener |
| CN110735881A (en) * | 2019-09-06 | 2020-01-31 | 株洲时代新材料科技股份有限公司 | Rigidity adjusting method of liquid composite spring |
| US12049935B2 (en) | 2019-09-06 | 2024-07-30 | Zhuzhou Times New Material Technology Co., Ltd | Liquid composite spring and method for adjusting stiffness and damping property thereof |
| CN115929842A (en) * | 2023-01-05 | 2023-04-07 | 株洲时代瑞唯减振装备有限公司 | Vibration reduction method for driving motor of metro vehicle and composite vibration reduction mounting pad |
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|---|---|
| CN103104644B (en) | 2015-09-09 |
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Effective date of registration: 20200605 Address after: 412007 No.301, physical and chemical building, Liyu Industrial Park, no.639, Heilongjiang Road, Tianyuan District, Zhuzhou City, Hunan Province Patentee after: Zhuzhou Times Ruiwei damping equipment Co., Ltd Address before: 412007 No. 18 Haitian Road, Tianyuan District, Hunan, Zhuzhou Patentee before: Zhuzhou Times New Material Technology Co.,Ltd. |