CN111827019A - Track backing plate with vibration/noise reduction function - Google Patents
Track backing plate with vibration/noise reduction function Download PDFInfo
- Publication number
- CN111827019A CN111827019A CN202010649352.5A CN202010649352A CN111827019A CN 111827019 A CN111827019 A CN 111827019A CN 202010649352 A CN202010649352 A CN 202010649352A CN 111827019 A CN111827019 A CN 111827019A
- Authority
- CN
- China
- Prior art keywords
- track
- plate
- base plate
- noise reduction
- fixedly connected
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B9/00—Fastening rails on sleepers, or the like
- E01B9/68—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair
- E01B9/685—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair characterised by their shape
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B19/00—Protection of permanent way against development of dust or against the effect of wind, sun, frost, or corrosion; Means to reduce development of noise
- E01B19/003—Means for reducing the development or propagation of noise
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B9/00—Fastening rails on sleepers, or the like
- E01B9/68—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair
- E01B9/685—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair characterised by their shape
- E01B9/686—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair characterised by their shape with textured surface
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Railway Tracks (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention discloses a track base plate with a shock absorption and noise reduction function, which comprises a pre-buried base plate and a protection mechanism, wherein a fixed base is arranged at the top end of the pre-buried base plate, the bottom end of the inner side of the fixed base is provided with the track base plate, the protection mechanism comprises two holes, the two holes are respectively arranged on two sides of the surface of the top end of the track base plate, the inner sides of the holes are provided with protection inner ring sleeves, the inner side surfaces of the holes are provided with limit fixing grooves, the outer side surfaces of the protection inner ring sleeves are fixedly connected with limit fixing blocks, and the limit fixing blocks are clamped on the; compared with the prior art, the invention has the beneficial effects that: through having designed the cushion plate, play the cushioning effect, the cushion plate top has installed circular convex block additional moreover, leaves the clearance, plays the cushioning effect, has installed the protection inner race additional through the hole inboard, prevents that clamp plate fixing bolt from passing hole inboard back, causes wearing and tearing to hole inboard, the phenomenon of deformation fracture appears.
Description
Technical Field
The invention belongs to the technical field of rail transit, and particularly relates to a rail base plate with a damping and noise reducing function.
Background
Railway is a track line for vehicles such as trains, and railway transportation is a land transportation mode, in which a locomotive pulls a train vehicle to run on two parallel rails. The traditional mode is steel wheel traveling, but the generalized railway transportation still includes non-steel wheel traveling modes such as magnetic suspension trains, cable cars, cableways and the like, or rail transportation. The rails provide an extremely smooth and hard medium on which the train wheels roll with minimal friction, making the upper person more comfortable, and it also saves energy. If properly configured, rail transport can save five to seven costs of energy over road transport when carrying the same weight. Moreover, the rails can evenly disperse the weight of the train, so that the loading capacity of the train is greatly improved. The track backing plate is the important part in the railway track structure, install between rail and concrete sleeper, its main function is produced high-speed vibration and impact when buffering vehicle pass through the rail, protection road bed and sleeper, and carry out electrical insulation to signal system, but present backing plate is easy ageing, the easy emergence deformation fracture of trompil department, and shock attenuation nature and corrosion resistance are poor, can not use for a long time, need dismantle after using a period and change again, very big waste resource, and present backing plate is not convenient for install, staff's work load has been increased, for this reason we provide a track backing plate with vibration/noise reduction function.
Disclosure of Invention
The invention aims to provide a track base plate with a damping and noise reducing function, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a track backing plate with vibration/noise reduction function, includes pre-buried backing plate and protection machanism, pre-buried backing plate top is provided with unable adjustment base, unable adjustment base inboard bottom is provided with the track backing plate, protection machanism includes the hole, two have been seted up altogether to the quantity of hole the hole is seted up respectively in track backing plate top surface both sides, the hole inboard is provided with the protection snare, spacing fixed slot has been seted up to the inboard surface of hole, the spacing fixed block of protection inner circle cover outside surface fixedly connected with, the spacing fixed slot of spacing fixed block is inboard, track backing plate top fixed surface is connected with the cushion board, cushion board top fixed surface is connected with circular lug.
Preferably, a track backing plate with vibration/noise reduction function, including positioning mechanism, positioning mechanism is including the installation constant head tank, the quantity of installation constant head tank is provided with two altogether the installation constant head tank is seted up respectively in the inboard bottom surface both sides of unable adjustment base, the equal fixedly connected with installation location strip in track backing plate bottom surface both sides, two the installation location strip is in two respectively the installation constant head tank is inboard, the arc wall has all been seted up at the inboard both ends of installation constant head tank, the equal fixedly connected with arc lug in installation location strip both sides surface, two the arc lug block respectively two the arc wall is inboard.
Preferably, the surfaces of the two sides of the track base plate are fixedly connected with reinforcing ribs, the top end and the bottom end surface of the track base plate are provided with shock absorption coatings, and the outer side surfaces of the shock absorption coatings are provided with wear-resistant coatings.
Preferably, the top surface of the rubber mat plate is provided with a steel rail, the bottom surface of the steel rail is attached to the top surface of the circular bump, and the circular bump is tiled on the top surface of the rubber mat plate.
Preferably, the protection inner ring sleeve is cylindrical, the outer side of the protection inner ring sleeve is attached to the inner side surface of the hole, and the limiting fixing blocks are distributed around the outer side of the protection inner ring sleeve at equal intervals.
Preferably, the two sides of the top end of the track base plate are fixedly connected with two limiting strips, and the number of the limiting strips is two.
Preferably, the number of the mounting and positioning strips is two, and the mounting and positioning strips and the track base plate are integrally formed.
Preferably, the two sides of the top end of the track base plate, which are positioned on the steel rail, are provided with upper pressing plates, and the top ends of the upper pressing plates are provided with pressing plate fixing bolts.
Preferably, the inner side of the pressure plate fixing bolt through hole is fixedly connected with the fixing base, and the number of the pressure plate fixing bolts is two.
Preferably, the number of the reinforcing ribs is two, and the two reinforcing ribs are fixedly connected with the track base plate.
Compared with the prior art, the invention has the beneficial effects that:
(1) through having designed the cushion plate, play the shock attenuation and fall the effect of making an uproar, the cushion plate top has installed circular convex block additional moreover, leaves the clearance, plays the cushioning effect, has installed the protection endotheca through the hole inboard additional, prevents that clamp plate fixing bolt from passing hole inboard back, causes wearing and tearing to hole inboard, the phenomenon of deformation fracture appears, plays the guard action.
(2) Through having designed positioning mechanism, conveniently install the preliminary location of track backing plate in the inboard bottom of unable adjustment base, when conveniently laying the rail, the condition of skew can not take place for the track backing plate, and fixed mode adopts the mode of buckle, simple structure, and convenient operation saves time, improves work efficiency.
(3) Install damping coating additional through the track backing plate outside, further improved the holistic shock attenuation nature of track backing plate, installed wear-resistant coating additional through the damping coating outside, improve the wearability of track backing plate, improve life, prevent the problem of ageing fracture, the staff need not frequently change, reduces staff's work load.
Drawings
FIG. 1 is a schematic sectional view of the overall installation of the present invention;
FIG. 2 is an enlarged schematic view of FIG. 1 at A according to the present invention;
FIG. 3 is a schematic top view of the track pad of the present invention;
FIG. 4 is an enlarged view of the structure of FIG. 3 at B according to the present invention;
FIG. 5 is an enlarged view of the structure of FIG. 4 at C;
FIG. 6 is a cross-sectional structural view of the rail pad of the present invention;
in the figure: 1. pre-burying a base plate; 2. a fixed base; 3. a rail backing plate; 4. installing a positioning strip; 5. an arc-shaped slot; 6. an arc-shaped bump; 7. installing a positioning groove; 8. a limiting strip; 9. a hole; 10. a rubber backing plate; 11. a circular bump; 12. reinforcing ribs; 13. a protective inner ring sleeve; 14. a limiting fixing groove; 15. a limit fixing block; 16. a wear-resistant coating; 17. a shock absorbing coating; 18. an upper pressure plate; 19. a pressing plate fixing bolt; 20. a steel rail.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious 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 derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-6, the present invention provides the following technical solutions: the utility model provides a track backing plate with vibration/noise reduction function, including pre-buried backing plate 1 and protection machanism, 1 top of pre-buried backing plate is provided with unable adjustment base 2, 2 inboard bottoms of unable adjustment base are provided with track backing plate 3, protection machanism includes hole 9, two have been seted up altogether to the quantity of hole 9, two hole 9 are seted up respectively in 3 top surface both sides of track backing plate, hole 9 inboard is provided with protection inner ring 13, spacing fixed slot 14 has been seted up to the side surface in hole 9, 13 outside fixed surface of protection inner ring is connected with spacing fixed block 15, the spacing fixed slot 14 inboards of 15 blocks of spacing fixed block, 3 top fixed surface on track backing plate are connected with cushion board 10, cushion board 10 top fixed.
In order to facilitate the preliminary positioning and installation of the track pad plate 3 at the bottom end of the inner side of the fixed base 2, and facilitate the laying of the steel rail 20, the track pad plate 3 can not deviate, the fixing mode adopts a buckling mode, the structure is simple, the operation is convenient, the time is saved, and the working efficiency is improved, in the embodiment, the track pad plate with the functions of shock absorption and noise reduction is preferred, the track pad plate comprises a positioning mechanism, the positioning mechanism comprises two installation positioning grooves 7, the number of the installation positioning grooves 7 is two, the two installation positioning grooves 7 are respectively arranged at two sides of the bottom end surface of the inner side of the fixed base 2, the two sides of the bottom end surface of the track pad plate 3 are fixedly connected with installation positioning strips 4, the two installation positioning strips 4 are respectively arranged at the inner sides of the two installation positioning grooves 7, the two ends, the two arc-shaped convex blocks 6 are respectively clamped at the inner sides of the two arc-shaped grooves 5.
In order to facilitate the track backing plate 3 outside to install shock attenuation coating 17 additional, the holistic shock attenuation nature of track backing plate 3 has further been improved, wear-resistant coating 16 has been installed additional through shock attenuation coating 17 outside, the wearability of track backing plate 3 is improved, and service life is prolonged, prevent the problem of ageing fracture, the staff need not frequently change, reduce staff's work load, in the embodiment, it is preferred, 3 equal fixedly connected with strengthening ribs 12 in both sides of track backing plate surface, 3 tops of track backing plate all are provided with shock attenuation coating 17 with the bottom surface, shock attenuation coating 17 outside surface all is provided with wear-resistant coating 16.
In order to facilitate the installation of the steel rail 20 and to achieve the shock absorption effect, in this embodiment, preferably, the top surface of the rubber mat 10 is provided with the steel rail 20, the bottom surface of the steel rail 20 is attached to the top surface of the circular bump 11, and the circular bump 11 is flatly laid on the top surface of the rubber mat 10.
In order to facilitate installation of the protective inner ring sleeve 13 and prevent the protective inner ring sleeve 13 from falling off, in the embodiment, preferably, the protective inner ring sleeve 13 is set to be cylindrical, the outer side of the protective inner ring sleeve 13 is attached to the inner side surface of the hole 9, and the limiting fixing blocks 15 are distributed around the outer side of the protective inner ring sleeve 13 at equal intervals.
In order to facilitate the installation of the limit strip 8, in the embodiment, preferably, the two sides of the top end of the track base plate 3 are fixedly connected with the limit strip 8, and the number of the limit strips 8 is two.
In order to facilitate installation of the installation positioning strips 4, in this embodiment, preferably, two installation positioning strips 4 are provided, and the two installation positioning strips 4 and the track backing plate 3 are integrally formed.
In order to fix the rail 20, in this embodiment, it is preferable that the top end of the rail pad 3 is provided with an upper pressing plate 18 on both sides of the rail 20, and the top end of the upper pressing plate 18 is provided with a pressing plate fixing bolt 19.
In order to facilitate the installation of the pressing plate fixing bolts 19, in the present embodiment, it is preferable that the pressing plate fixing bolts 19 penetrate through the inner side of the hole 9 and are fixedly connected with the fixing base 2, and the number of the pressing plate fixing bolts 19 is two.
In order to facilitate the installation of the reinforcing ribs 12 and improve the strength of the track pad 3, in this embodiment, preferably, two reinforcing ribs 12 are arranged, and the two reinforcing ribs 12 are fixedly connected with the track pad 3.
The working principle and the using process of the invention are as follows: after the device is finished, when a track base plate 3 needs to be installed, the track base plate 3 is firstly placed at the bottom of the inner side of a fixed base 2, then the bottom end of an installation positioning strip 4 is inserted in alignment with an installation positioning groove 7, due to the reason that the installation positioning strip 4 is made of soft material, an arc-shaped bump 6 can deform under stress when contacting the outer edge of the installation positioning groove 7, until the installation positioning strip 4 is completely positioned at the inner side of the installation positioning groove 7, the arc-shaped bump 6 is positioned at one side of an arc-shaped groove 5, the arc-shaped bump 6 rebounds to the original shape without stress and is clamped into the inner side of the arc-shaped groove 5, then a steel rail 20 begins to be laid, by designing a positioning mechanism, the track base plate 3 is conveniently and initially positioned and installed at the bottom end of the inner side of the fixed base 2, when the steel rail 20, the working efficiency is improved. After the steel rail 20 is laid, use top board 18 to push down 20 both sides of steel rail, then use clamp board fixing bolt 19 to fix locking, fix steel rail 20 on the surface of cushion board 10 top, through having designed cushion board 10, play the cushioning effect, and cushion board 10 top has installed circular lug 11 additional, leave the clearance, play the cushioning effect, install protection inner ring cover 13 additional through hole 9 inboard, prevent that clamp board fixing bolt 19 from passing hole 9 inboard back, cause wearing and tearing to hole 9 inboard, the phenomenon of deformation fracture appears, play the guard action. Install shock-absorbing coating 17 additional through the track backing plate 3 outside, further improved the holistic shock attenuation nature of track backing plate 3, installed wear-resistant coating 16 additional through the shock-absorbing coating 17 outside, improve track backing plate 3's wearability, improve life, prevent the problem of ageing fracture, the staff need not frequently change, reduces staff's work load.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a track backing plate with vibration/noise reduction function, includes pre-buried backing plate (1) and protection machanism, its characterized in that: the protection device is characterized in that a fixing base (2) is arranged at the top end of the embedded base plate (1), a track base plate (3) is arranged at the bottom end of the inner side of the fixing base (2), the protection mechanism comprises holes (9), two holes (9) are arranged in the number of the holes (9), the holes (9) are respectively arranged on two sides of the surface of the top end of the track base plate (3), a protection inner ring (13) is arranged on the inner side of each hole (9), a limiting fixing groove (14) is formed in the surface of the inner side of each hole (9), a limiting fixing block (15) is fixedly connected to the surface of the outer side of the protection inner ring (13), the limiting fixing groove (14) is clamped to the inner side of the limiting fixing block (15), a rubber base plate (10) is fixedly connected to the surface.
2. The track base plate with the shock absorption and noise reduction functions as claimed in claim 1, comprising a positioning mechanism, wherein: positioning mechanism is including installation constant head tank (7), the quantity of installation constant head tank (7) is provided with two altogether, two installation constant head tank (7) are seted up respectively in unable adjustment base (2) inboard bottom surface both sides, the equal fixedly connected with installation location strip (4) in track backing plate (3) bottom surface both sides, two installation location strip (4) are in two respectively installation constant head tank (7) are inboard, arc wall (5) have all been seted up at installation constant head tank (7) inboard both ends, the equal fixedly connected with arc lug (6) in installation location strip (4) both sides surface, two arc lug (6) block respectively two arc wall (5) are inboard.
3. The track liner plate with the shock absorption and noise reduction functions as claimed in claim 1, wherein: the track backing plate (3) both sides surface all fixedly connected with strengthening rib (12), track backing plate (3) top and bottom surface all are provided with shock attenuation coating (17), shock attenuation coating (17) outside surface all is provided with wear-resistant coating (16).
4. The track liner plate with the shock absorption and noise reduction functions as claimed in claim 1, wherein: the steel rail (20) is arranged on the top end surface of the rubber base plate (10), the bottom end surface of the steel rail (20) is attached to the top end surface of the circular bump (11), and the circular bump (11) is tiled on the top end surface of the rubber base plate (10).
5. The track liner plate with the shock absorption and noise reduction functions as claimed in claim 1, wherein: the protective inner ring sleeve (13) is cylindrical, the outer side of the protective inner ring sleeve (13) is attached to the inner side surface of the hole (9), and the limiting fixing blocks (15) are distributed around the outer side of the protective inner ring sleeve (13) at equal intervals.
6. The track liner plate with the shock absorption and noise reduction functions as claimed in claim 1, wherein: the track backing plate (3) top both sides equal fixedly connected with spacing strip (8), the quantity of spacing strip (8) is provided with two altogether.
7. The track liner plate with the shock absorption and noise reduction functions as claimed in claim 2, wherein: the number of the mounting and positioning strips (4) is two, and the mounting and positioning strips (4) and the track base plate (3) are integrally formed.
8. The track liner plate with the shock absorption and noise reduction functions as claimed in claim 4, wherein: the top end of the track base plate (3) is provided with upper pressing plates (18) on two sides of a steel rail (20), and pressing plate fixing bolts (19) are arranged on the top ends of the upper pressing plates (18).
9. The track liner plate with the shock absorption and noise reduction functions as claimed in claim 8, wherein: the pressing plate fixing bolts (19) penetrate through the inner side of the hole (9) and are fixedly connected with the fixing base (2), and two pressing plate fixing bolts (19) are arranged.
10. The track liner plate with the shock absorption and noise reduction functions as claimed in claim 3, wherein: the number of the reinforcing ribs (12) is two, and the reinforcing ribs (12) are fixedly connected with the track base plate (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010649352.5A CN111827019A (en) | 2020-07-07 | 2020-07-07 | Track backing plate with vibration/noise reduction function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010649352.5A CN111827019A (en) | 2020-07-07 | 2020-07-07 | Track backing plate with vibration/noise reduction function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111827019A true CN111827019A (en) | 2020-10-27 |
Family
ID=72901223
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010649352.5A Pending CN111827019A (en) | 2020-07-07 | 2020-07-07 | Track backing plate with vibration/noise reduction function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111827019A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114775340A (en) * | 2022-04-12 | 2022-07-22 | 上海工程技术大学 | Subway track backing plate assembly with vibration and noise reduction function |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050090103A (en) * | 2005-08-22 | 2005-09-12 | 박건홍 | Anti-vibration fastener for junction train rail |
| CN102704353A (en) * | 2012-06-29 | 2012-10-03 | 中国铁建重工集团有限公司 | Accessory for improving stressed condition of railway tie plate bolt |
| CN203475245U (en) * | 2013-06-19 | 2014-03-12 | 江阴海达橡塑股份有限公司 | Vibration damping elastic base plate for ballast track |
| CN104611999A (en) * | 2015-01-30 | 2015-05-13 | 于俭海 | High-speed and heavy-load track fixing system |
| CN107165001A (en) * | 2017-06-27 | 2017-09-15 | 天津银龙高科新材料研究院有限公司 | A kind of novel elastic Shock-absorption track plate |
| CN208072097U (en) * | 2018-03-21 | 2018-11-09 | 中铁二院工程集团有限责任公司 | A kind of fastener system suitable for high-speed and common-speed urban track traffic of optimization |
| CN209099073U (en) * | 2018-08-10 | 2019-07-12 | 洛阳科博思新材料科技有限公司 | A kind of fastener system backing plate |
| CN209162544U (en) * | 2018-10-17 | 2019-07-26 | 天津西恩轨道交通有限公司 | A kind of track installation backing plate being easily installed |
| CN110552258A (en) * | 2019-09-06 | 2019-12-10 | 长兴科腾实业有限公司 | stamping-resistant high-strength elastic rail lower backing plate |
-
2020
- 2020-07-07 CN CN202010649352.5A patent/CN111827019A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050090103A (en) * | 2005-08-22 | 2005-09-12 | 박건홍 | Anti-vibration fastener for junction train rail |
| CN102704353A (en) * | 2012-06-29 | 2012-10-03 | 中国铁建重工集团有限公司 | Accessory for improving stressed condition of railway tie plate bolt |
| CN203475245U (en) * | 2013-06-19 | 2014-03-12 | 江阴海达橡塑股份有限公司 | Vibration damping elastic base plate for ballast track |
| CN104611999A (en) * | 2015-01-30 | 2015-05-13 | 于俭海 | High-speed and heavy-load track fixing system |
| CN107165001A (en) * | 2017-06-27 | 2017-09-15 | 天津银龙高科新材料研究院有限公司 | A kind of novel elastic Shock-absorption track plate |
| CN208072097U (en) * | 2018-03-21 | 2018-11-09 | 中铁二院工程集团有限责任公司 | A kind of fastener system suitable for high-speed and common-speed urban track traffic of optimization |
| CN209099073U (en) * | 2018-08-10 | 2019-07-12 | 洛阳科博思新材料科技有限公司 | A kind of fastener system backing plate |
| CN209162544U (en) * | 2018-10-17 | 2019-07-26 | 天津西恩轨道交通有限公司 | A kind of track installation backing plate being easily installed |
| CN110552258A (en) * | 2019-09-06 | 2019-12-10 | 长兴科腾实业有限公司 | stamping-resistant high-strength elastic rail lower backing plate |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114775340A (en) * | 2022-04-12 | 2022-07-22 | 上海工程技术大学 | Subway track backing plate assembly with vibration and noise reduction function |
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Application publication date: 20201027 |