CN109404461A - A kind of vibration-proof structure and the vehicle with the vibration-proof structure - Google Patents
A kind of vibration-proof structure and the vehicle with the vibration-proof structure Download PDFInfo
- Publication number
- CN109404461A CN109404461A CN201710707586.9A CN201710707586A CN109404461A CN 109404461 A CN109404461 A CN 109404461A CN 201710707586 A CN201710707586 A CN 201710707586A CN 109404461 A CN109404461 A CN 109404461A
- Authority
- CN
- China
- Prior art keywords
- vibration
- support
- vibration damping
- vehicle
- damping wheel
- 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
Links
- 238000013016 damping Methods 0.000 claims abstract description 71
- 229920001971 elastomer Polymers 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims 1
- 238000006073 displacement reaction Methods 0.000 abstract description 16
- 230000000694 effects Effects 0.000 abstract description 8
- 238000010586 diagram Methods 0.000 description 5
- 238000002955 isolation Methods 0.000 description 4
- 239000000725 suspension Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 2
- 229920001195 polyisoprene Polymers 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
- F16F7/00—Vibration-dampers; Shock-absorbers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D33/00—Superstructures for load-carrying vehicles
- B62D33/06—Drivers' cabs
- B62D33/0604—Cabs insulated against vibrations or noise, e.g. with elastic suspension
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Vibration Prevention Devices (AREA)
- Body Structure For Vehicles (AREA)
Abstract
The present invention relates to a kind of vibration-proof structure and with the vehicle of the vibration-proof structure, vibration-proof structure includes first support and second support, the first support and second support are rotatably equipped with the first vibration damping wheel and the second vibration damping wheel respectively, and the line at described two vibration damping wheel centers and the direction of vibration of second support have angle.The line of centres of first vibration damping wheel and the second vibration damping wheel and vertical direction have angle, vehicle frame is when vertical direction has displacement, second vibration damping wheel passes to the first vibration damping wheel by displacement component, keep the displacement of the second vibration damping wheel in the vertical direction smaller, the displacement of driver's cabin in the vertical direction is passed to effectively reduce vehicle frame, plays preferable damping effect.
Description
Technical field
The present invention relates to a kind of vibration-proof structure and with the vehicle of the vibration-proof structure.
Background technique
With the development of China Transportation Industry and the progress of science and technology, comfort requirement of the people to truck
Higher and higher, main truck domestic at present is all made of the rear suspension device with helical spring or air spring, Neng Gouyou
Improve the comfort of driver's cabin in effect ground.But the characteristics of due to helical spring and air spring itself and steering room back suspension arrangement space
Limitation, existing driving cab rear suspension bearing capacity is limited, is not able to satisfy the biggish specific use of some driver's cabin weight and carries
Weight automobile needs the vibration damping of driver's cabin.In response to this, Authorization Notice No. CN203473036U, authorized announcement date are
2014.03.12 Chinese utility model patent discloses a kind of cab rear suspender, which includes that rear-suspending vehicle body connects
Bracket, rubber buffer vibration isolation block and suspension second support are connect, the excircle of rubber buffer vibration isolation block is equipped with rubber, passes through rubber
The rubber that the internal axle sleeve and excircle for buffering vibration isolation block are equipped with generates moderate finite deformation, so that it is biggish so that driver's cabin is generated
Displacement, buffer shock-absorbing effect are obvious.But using this single rubber mounting, although vibration isolation effect is good, its deformation displacement is larger,
Driver's cabin also has biggish displacement therewith, and driver's cabin is made to have apparent shaking, influences the operation of driver.
Summary of the invention
The purpose of the present invention is to provide a kind of vibration-proof structures, to drive when solving in the prior art using single rubber mounting
Room is easy the problem of wobble effects driver operation；Purpose, which also resides in, provides a kind of vehicle using the vibration-proof structure.
To achieve the above object, the first technical solution of vibration-proof structure of the present invention is: a kind of vibration-proof structure, including first
Bracket and second support, the first support and second support are rotatably equipped with the first vibration damping wheel and the second vibration damping wheel, institute respectively
The direction of vibration of the line and second support of stating two vibration damping wheel centers has angle.
Second of technical solution of vibration-proof structure of the present invention is: in the base of the first technical solution of vibration-proof structure of the present invention
On plinth, the vibration damping wheel includes cylindrical body and the elastic component that cylindrical body periphery is arranged in.Elastic component can increase vibration damping effect
Fruit.
The third technical solution of vibration-proof structure of the present invention is: in the base of second of technical solution of vibration-proof structure of the present invention
On plinth, the elastic component is made of rubber material.Caoutchouc elasticity is good and cheap, and cost is relatively low.
4th kind of technical solution of vibration-proof structure of the present invention is: the first in vibration-proof structure of the present invention is any to the third
On the basis of a kind of technical solution, the first support is equipped with the first stationary plane being fixedly connected with the bottom surface of driver's cabin, described
Second support is equipped with the second stationary plane being fixedly connected with vehicle frame upper surface, and first stationary plane is parallel with the second stationary plane to be set
It sets.The power for guaranteeing that vehicle frame and driver's cabin are subject to is pressure, and shearing force can be generated to vehicle frame by avoiding traditional vibration-proof structure, is extended
The service life of vehicle frame.
To achieve the above object, the first technical solution of vehicle of the present invention is: vehicle, including driver's cabin, vehicle frame and position
Vibration-proof structure between driver's cabin and vehicle frame, the vibration-proof structure include left and right symmetrically arranged damping assembly, the vibration damping
Component includes first support and second support, and the first vibration damping wheel and second are respectively fitted in the first support and second support
Vibration damping wheel, the line at described two vibration damping wheel centers and the direction of vibration of second support have angle.
Second of technical solution of vehicle of the present invention is: on the basis of the first technical solution of vehicle of the present invention, institute
Stating vibration damping wheel includes cylindrical body and the elastic component that cylindrical body periphery is arranged in.Elastic component can increase effectiveness in vibration suppression, can
Increase effectiveness in vibration suppression.
The third technical solution of vehicle of the present invention is: on the basis of second of technical solution of vehicle of the present invention, institute
Elastic component is stated to be made of rubber material.Caoutchouc elasticity is good and cheap, and cost is relatively low.
4th kind of technical solution of vehicle of the present invention is: vehicle of the present invention the first to the third any one technology
On the basis of scheme, the first support is equipped with the first stationary plane being fixedly connected with the bottom surface of driver's cabin, the second support
Equipped with the second stationary plane being fixedly connected with vehicle frame upper surface, first stationary plane is arranged in parallel with the second stationary plane.Guarantee
The power that vehicle frame and driver's cabin are subject to is pressure, and shearing force can be generated to vehicle frame by avoiding traditional vibration-proof structure, extends vehicle frame
Service life.
5th kind of technical solution of vehicle of the present invention is: vehicle of the present invention the first to the third any one technology
On the basis of scheme, the damping assembly is symmetrically arranged on vehicle frame.Make driver's cabin uniform force in vibration, multiplies passenger
It is more comfortable when seat.
6th kind of technical solution of vehicle of the present invention is: on the basis of the 5th kind of technical solution of vehicle of the present invention, institute
The outside that the second vibration damping wheel is arranged in the first vibration damping wheel is stated, second vibration damping wheel is suspended at frame outside.It can be in vehicle frame
Portion leaves more space.
The beneficial effects of the present invention are: the line of centres of the first vibration damping wheel and the second vibration damping wheel and vertical direction have angle,
For vehicle frame when vertical direction has displacement, the second vibration damping wheel passes to the first vibration damping wheel by displacement component, and the second vibration damping wheel is made to exist
Displacement on vertical direction is smaller, so that effectively reducing vehicle frame passes to the displacement of driver's cabin in the vertical direction, play compared with
Good damping effect.
Detailed description of the invention
Fig. 1 is the schematic view of the mounting position of the vibration-proof structure of vehicle of the present invention；
Fig. 2 is the structural schematic diagram of the left end damping assembly of the vibration-proof structure of vehicle of the present invention；
Fig. 3 is the structural schematic diagram of the left and right end damping assembly of the vibration-proof structure of vehicle of the present invention；
Fig. 4 is the axonometric drawing of left damping assembly in Fig. 2；
Fig. 5 is the structural schematic diagram of the specific embodiment two of vehicle of the present invention；
Fig. 6 is the structural schematic diagram of the specific embodiment three of vehicle of the present invention；
Fig. 7 is the structural schematic diagram of the specific embodiment four of vehicle of the present invention.
Specific embodiment
Embodiments of the present invention are described further with reference to the accompanying drawing.
The specific embodiment one of vehicle of the invention, as shown in Figures 1 to 4, vehicle, including driver's cabin, vehicle frame and be located at
Vibration-proof structure 10 between the two, vibration-proof structure 10 include the damping assembly being symmetrical set, and left and right damping assembly props up jointly
It supports driver's cabin and vibration damping is carried out to the movement of driver's cabin up and down direction, the damping assembly includes first support 1, the first vibration damping wheel
2, the second vibration damping wheel 3 and second support 4.First support 1 includes the connecting plate 6 being fixedly connected with driver's cabin and perpendicular to the company of being located at
The joint face of the bottom surface of two parallel dead plates 7 on fishplate bar 6, connecting plate 6 and driver's cabin constitutes the first stationary plane, connecting plate 6
It is equipped with bolt hole, is bolted on the bottom of driver's cabin, fixed plate 7 is equipped with mounting hole, passes through pin shaft and the
The rotation connection of one vibration damping wheel 2；Second support 4 is U-shaped, is fixed on vehicle frame by U-shaped base plate 9, bottom plate 9 and vehicle frame upper surface
Joint face constitute the second stationary plane, two parallel creases of U-shaped are equipped with ear 8, and ear 8 is equipped with mounting hole, passes through pin shaft
It is rotatablely connected with the second vibration damping wheel 3.
Preferably, the outside of the second vibration damping wheel 3 is arranged in the first vibration damping wheel 2, and the second vibration damping wheel 3 is suspended at the outer of vehicle frame
Side.
Preferably, the first vibration damping wheel 2 and the second vibration damping wheel 3 by cylindrical body 5 and are located at its peripheral ring elastic parts
11 compositions, wherein ring elastic parts 11 are made of rubber material, and the first vibration damping wheel 2 and the second vibration damping wheel 3 pass through cyclic spring pad
Compressive deformation between 11 generates displacement, is subtracted to change the position of power and the angle of vertical direction of two vibration damping wheels with realizing
Vibration.
The principle of vibration-proof structure: the first vibration damping wheel 2 and the second vibration damping wheel 3 of 4 rolling assembling of first support 1 and second support
Contacted with each other by way of point, the installation site of two vibration damping wheels make the position of the power of two vibration damping wheels in vertical direction with
Certain angle α, as vertical displacement y of the vehicle frame when there is displacement in the direction z, at cab mounting are as follows:
Y=z × cos2α
When vehicle frame is in vertical vibration, angle [alpha] becomes larger, since the variation range of angle [alpha] is between 0~90 °, cos α
For decreasing function, then as vehicle frame moves up, angle [alpha] becomes larger, then the displacement y of driver's cabin is gradually to subtract relative to the displacement z of vehicle frame
Small；According to principles above, this vibration-proof structure reduces the speed and acceleration of effectively carrying out vehicle frame transmitting, to reach vibration damping
Effect.
The specific embodiment two of vehicle of the invention: as shown in figure 5, with embodiment one the difference is that, described
One vibration damping wheel 2 and the second vibration damping wheel 3 are cylindrical rubber block 12.
The specific embodiment three of vehicle of the invention: as shown in fig. 6, with embodiment one the difference is that, the U-shaped
Bottom plate 9 be mounted on the side plate of vehicle frame.
The specific embodiment four of vehicle of the invention: as shown in fig. 7, with embodiment one the difference is that, described
One bracket 7 is fixed on the side plate of cab bottom.
The specific embodiment five of vehicle of the invention: with embodiment one the difference is that, the first support and
Two brackets are separately fixed at cab bottom and vehicle frame upper end by welding.
The specific embodiment of vibration-proof structure of the invention, the specific embodiment one of the vibration-proof structure and above-mentioned vehicle to tool
The structure of the vibration-proof structure of any one in body embodiment five is identical, and it will not go into details.
Claims (10)
1. a kind of vibration-proof structure, it is characterised in that: including first support and second support, the first support and second support point
It is not rotatably equipped with the first vibration damping wheel and the second vibration damping wheel, the line at described two vibration damping wheel centers and the vibration side of second support
To there is angle.
2. vibration-proof structure according to claim 1, it is characterised in that: the vibration damping wheel includes cylindrical body and is arranged in circle
The elastic component of column ontology periphery.
3. vibration-proof structure according to claim 2, it is characterised in that: the elastic component is made of rubber material.
4. vibration-proof structure according to claim 1 to 3, it is characterised in that: the first support is equipped with and driving
The first stationary plane that the bottom surface of room is fixedly connected, it is fixed that the second support is equipped with second be fixedly connected with vehicle frame upper surface
Face, first stationary plane are arranged in parallel with the second stationary plane.
5. vehicle, including driver's cabin, vehicle frame and the vibration-proof structure between driver's cabin and vehicle frame, it is characterised in that: described to subtract
Structure of shaking includes damping assembly, and the damping assembly includes the first support connecting with driver's cabin and second connect with vehicle frame
Frame, is respectively fitted with the first vibration damping wheel and the second vibration damping wheel in the first support and second support, in described two vibration damping wheels
The line of the heart and the direction of vibration of second support have angle.
6. vehicle according to claim 5, it is characterised in that: the vibration damping wheel includes cylindrical body and is arranged in cylinder sheet
The elastic component of body periphery.
7. vehicle according to claim 6, it is characterised in that: the elastic component is made of rubber material.
8. according to vehicle described in claim 5-7 any one, it is characterised in that: the first support be equipped with for driving
The first stationary plane that the bottom surface of room is fixedly connected, the second support are solid equipped with second for being fixedly connected with vehicle frame upper surface
Determine face, first stationary plane is arranged in parallel with the second stationary plane.
9. according to vehicle described in claim 5-7 any one, it is characterised in that: vehicle is symmetrically arranged in the damping assembly
On frame.
10. vehicle according to claim 9, it is characterised in that: the outer of the second vibration damping wheel is arranged in first vibration damping wheel
Side, second vibration damping wheel are suspended at frame outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710707586.9A CN109404461A (en) | 2017-08-17 | 2017-08-17 | A kind of vibration-proof structure and the vehicle with the vibration-proof structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710707586.9A CN109404461A (en) | 2017-08-17 | 2017-08-17 | A kind of vibration-proof structure and the vehicle with the vibration-proof structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109404461A true CN109404461A (en) | 2019-03-01 |
Family
ID=65454962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710707586.9A Pending CN109404461A (en) | 2017-08-17 | 2017-08-17 | A kind of vibration-proof structure and the vehicle with the vibration-proof structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109404461A (en) |
Citations (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4203499A (en) * | 1976-12-27 | 1980-05-20 | Toyota Shatai Kabushiki Kaisha | Apparatus for preventing or damping vibrations and noise in a vehicle |
| DE4009519A1 (en) * | 1990-03-24 | 1991-09-26 | Bayerische Motoren Werke Ag | Shock absorbing mounting for motor cycle handle bar - is attached to front fork by links fitted with rubber bushes |
| US5109939A (en) * | 1989-07-25 | 1992-05-05 | Richard Conaway | Vibration dampening suspension device for the cab of a truck vehicle |
| CN1118525A (en) * | 1994-08-30 | 1996-03-13 | 原田工业株式会社 | Apparatus for electrically driving a retractable antenna |
| EP1380535A1 (en) * | 2002-07-12 | 2004-01-14 | Still Gmbh | Mobile work machine with an elasticly supported cabin |
| RU2240248C2 (en) * | 2002-10-02 | 2004-11-20 | ГОУ ВПО Воронежский государственный архитектурно-строительный университет | Device for mounting cab on vehicle frame |
| CN201176112Y (en) * | 2007-12-17 | 2009-01-07 | 万向集团公司 | Support semi-axis assembly in multi-connecting bar type rear suspension system |
| FR2954303A1 (en) * | 2009-12-17 | 2011-06-24 | Linde Material Handling Gmbh | Bearing technique-vehicle i.e. elevating transporter, has driver seat module hanged on frames by twin control channel i.e. parallelogram linkage, and spring- and/or damper device arranged between driver seat module and frames |
| JP2012224276A (en) * | 2011-04-21 | 2012-11-15 | Isuzu Motors Ltd | Cab mount structure |
| JP2014015086A (en) * | 2012-07-06 | 2014-01-30 | Isuzu Motors Ltd | Front cab mount structure |
| CN203473036U (en) * | 2013-09-03 | 2014-03-12 | 安徽安凯华夏汽车配件制造有限公司 | Cab rear suspension device |
| CN204915872U (en) * | 2015-03-26 | 2015-12-30 | 中国北方车辆研究所 | Height bears weight of suspension device behind formula driver's cabin |
| CN205220828U (en) * | 2015-12-17 | 2016-05-11 | 山东美晨先进高分子材料科技有限公司 | It floats preceding suspension of driver's cabin to become rigidity half |
| CN105692290A (en) * | 2014-11-28 | 2016-06-22 | 天津精工华晖制版技术开发有限公司 | Portable anti-vibration device |
| CN105817345A (en) * | 2016-04-29 | 2016-08-03 | 无锡港盛重型装备有限公司 | De-oiling device |
| CN205647154U (en) * | 2016-05-12 | 2016-10-12 | 湖南山立水电设备制造有限公司 | Generator for hydroelectric power generation |
| CN205753852U (en) * | 2016-05-16 | 2016-11-30 | 南昌富亿达电机电器有限公司 | A kind of car generator protector |
| CN106471962A (en) * | 2015-09-02 | 2017-03-08 | 哈尔滨弘睿翔科技开发有限公司 | A kind of special seeding machinery device of agricultural production for installing vibration damping wheel |
| CN206238227U (en) * | 2016-10-08 | 2017-06-13 | 天津市强源食品有限公司 | Vacuum tumbler |
| CN206258169U (en) * | 2016-11-30 | 2017-06-16 | 广西玉柴机器股份有限公司 | A kind of engine consumption tests the caliberating device of quick check |
| CN207178552U (en) * | 2017-08-17 | 2018-04-03 | 河南奔马股份有限公司 | Vibration-proof structure and the vehicle with the vibration-proof structure |
-
2017
- 2017-08-17 CN CN201710707586.9A patent/CN109404461A/en active Pending
Patent Citations (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4203499A (en) * | 1976-12-27 | 1980-05-20 | Toyota Shatai Kabushiki Kaisha | Apparatus for preventing or damping vibrations and noise in a vehicle |
| US5109939A (en) * | 1989-07-25 | 1992-05-05 | Richard Conaway | Vibration dampening suspension device for the cab of a truck vehicle |
| DE4009519A1 (en) * | 1990-03-24 | 1991-09-26 | Bayerische Motoren Werke Ag | Shock absorbing mounting for motor cycle handle bar - is attached to front fork by links fitted with rubber bushes |
| CN1118525A (en) * | 1994-08-30 | 1996-03-13 | 原田工业株式会社 | Apparatus for electrically driving a retractable antenna |
| EP1380535A1 (en) * | 2002-07-12 | 2004-01-14 | Still Gmbh | Mobile work machine with an elasticly supported cabin |
| RU2240248C2 (en) * | 2002-10-02 | 2004-11-20 | ГОУ ВПО Воронежский государственный архитектурно-строительный университет | Device for mounting cab on vehicle frame |
| CN201176112Y (en) * | 2007-12-17 | 2009-01-07 | 万向集团公司 | Support semi-axis assembly in multi-connecting bar type rear suspension system |
| FR2954303A1 (en) * | 2009-12-17 | 2011-06-24 | Linde Material Handling Gmbh | Bearing technique-vehicle i.e. elevating transporter, has driver seat module hanged on frames by twin control channel i.e. parallelogram linkage, and spring- and/or damper device arranged between driver seat module and frames |
| JP2012224276A (en) * | 2011-04-21 | 2012-11-15 | Isuzu Motors Ltd | Cab mount structure |
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| CN203473036U (en) * | 2013-09-03 | 2014-03-12 | 安徽安凯华夏汽车配件制造有限公司 | Cab rear suspension device |
| CN105692290A (en) * | 2014-11-28 | 2016-06-22 | 天津精工华晖制版技术开发有限公司 | Portable anti-vibration device |
| CN204915872U (en) * | 2015-03-26 | 2015-12-30 | 中国北方车辆研究所 | Height bears weight of suspension device behind formula driver's cabin |
| CN106471962A (en) * | 2015-09-02 | 2017-03-08 | 哈尔滨弘睿翔科技开发有限公司 | A kind of special seeding machinery device of agricultural production for installing vibration damping wheel |
| CN205220828U (en) * | 2015-12-17 | 2016-05-11 | 山东美晨先进高分子材料科技有限公司 | It floats preceding suspension of driver's cabin to become rigidity half |
| CN105817345A (en) * | 2016-04-29 | 2016-08-03 | 无锡港盛重型装备有限公司 | De-oiling device |
| CN205647154U (en) * | 2016-05-12 | 2016-10-12 | 湖南山立水电设备制造有限公司 | Generator for hydroelectric power generation |
| CN205753852U (en) * | 2016-05-16 | 2016-11-30 | 南昌富亿达电机电器有限公司 | A kind of car generator protector |
| CN206238227U (en) * | 2016-10-08 | 2017-06-13 | 天津市强源食品有限公司 | Vacuum tumbler |
| CN206258169U (en) * | 2016-11-30 | 2017-06-16 | 广西玉柴机器股份有限公司 | A kind of engine consumption tests the caliberating device of quick check |
| CN207178552U (en) * | 2017-08-17 | 2018-04-03 | 河南奔马股份有限公司 | Vibration-proof structure and the vehicle with the vibration-proof structure |
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