CN103851121B - Snaking prevention shock absorber - Google Patents
Snaking prevention shock absorber Download PDFInfo
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- CN103851121B CN103851121B CN201210522498.9A CN201210522498A CN103851121B CN 103851121 B CN103851121 B CN 103851121B CN 201210522498 A CN201210522498 A CN 201210522498A CN 103851121 B CN103851121 B CN 103851121B
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- pressure cylinder
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- 239000006096 absorbing agent Substances 0.000 title abstract description 14
- 230000035939 shock Effects 0.000 title abstract description 14
- 230000002265 prevention Effects 0.000 title abstract 5
- 230000006835 compression Effects 0.000 claims abstract description 9
- 238000007906 compression Methods 0.000 claims abstract description 9
- 239000012530 fluid Substances 0.000 claims description 14
- 238000007789 sealing Methods 0.000 abstract description 4
- 238000010521 absorption reaction Methods 0.000 abstract 4
- 238000013016 damping Methods 0.000 description 12
- 238000005096 rolling process Methods 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- Fluid-Damping Devices (AREA)
Abstract
The invention discloses a snaking prevention shock absorber. The snaking prevention shock absorber comprises a piston rod, a piston, a pressure cylinder, a sealing end cover, an oil storage cylinder, a bottom valve and a fastening piece, wherein the bottom valve is provided with a compression side proportional valve and a first oil absorption one-way valve, two ends of the compression side proportional valve and the first oil absorption one-way valve are respectively communicated with a right cavity of the pressure cylinder and a low-pressure oil storage area, the bottom valve is provided with a connecting sleeve, the connecting sleeve is sleeved at the periphery of the right end part of the pressure cylinder, the bottom valve is provided with an oil outlet hole which is provided with a downward opening and is communicated with the low-pressure oil storage area, the piston is provided with a compression side overflow valve and a stretching side overflow valve, the sealing end cover is provided with a stretching side proportional valve and a second oil absorption one-way valve, two ends of the stretching side proportional valve and the second oil absorption one-way valve are respectively communicated with a left cavity of the pressure cylinder and the low-pressure storage area, and the upper parts of cylinder walls at two end parts of the pressure cylinder are respectively provided with a first throttling hole and a second throttling hole. According to the snaking prevention shock absorber disclosed by the invention, the damp generating flexibility of the snaking prevention shock absorber can be increased, and the performance stability can be ensured.
Description
Technical field
The invention belongs to a kind of oil-pressure damper used for rolling stock, the anti-oil pressure that crawls for rolling stock is particularly related to
Shock absorber.
Background technology
The longitudinally mounted anti-hunting damper holder between car body and bogie, can effectively suppress the hunting of bogie, can
The critical speed for making generation crawl when vibrating is improved, so as to ensure safety of the vehicle when conventional speeds run.More than 160km/h
Rolling stock anti-hunting damper holder should be typically housed.Such as there are unstable properties or disabled status in anti-hunting damper holder, then may be used
Vehicle derailing risk can be produced, traffic safety is influenceed.Design requirement anti-hunting damper holder needs under less speed and amplitude
Larger damping force is produced, therefore requires that anti-hunting damper holder has damping response speed faster.Existing anti-hunting damper holder
Although larger damping force value can be produced under less speed conditions, damped coefficient is little with velocity variations, sensitivity
Not high, stability is not good.
The content of the invention
It is an object of the invention to provide a kind of sensitivity that can improve resistance of shock absorber generation, can guarantee that performance is steady again
Qualitatively anti-hunting damper holder.
In order to achieve the above object, the technical scheme is that：A kind of anti-hunting damper holder, including piston rod, piston,
Pressure cylinder, end cover, oil storage cylinder, bottom valve and fastener, wherein one end of the piston rod stretches into pressure cylinder and end fills
Connect piston, the other end of piston rod is stretched out outside end cover, and shaft is slidingly sealed cooperation, bottom valve with the endoporus of end cover
Installed in oil storage cylinder inner bottom part, pressure cylinder is fixed between bottom valve and end cover, and the gap between pressure cylinder and oil storage cylinder is
Low-pressure oil storage area, end cover is located at one end of oil storage cylinder, and is offseted with one end of pressure cylinder by fastener, and piston is located at
Cooperation is slidingly sealed in pressure cylinder and with pressure cylinder, left chamber, the right-hand member of piston are formed between the left side of piston and end cover
Right chamber is formed between face and bottom valve, on the bottom valve be equipped with compressed side proportioning valve and the first oil sucting one-way valve, compressed side with than
The two ends of example valve and the first oil sucting one-way valve respectively communicate with pressure cylinder right chamber and low-pressure oil storage area, and the bottom valve has connection
Set, adapter sleeve is enclosed within the right part periphery of pressure cylinder, is provided with downward opening on adapter sleeve and is communicated with low-pressure oil storage area
Outage, bottom valve bottom is provided with oil suction groove that is downward opening and being communicated with low-pressure oil storage area, equipped with compression on the piston
Side overflow valve and tensile side overflow valve, are equipped with tensile side proportioning valve and the second oil sucting one-way valve on the end cover,
The two ends of tensile side proportioning valve and the second oil sucting one-way valve respectively communicate with pressure cylinder left chamber and low-pressure oil storage area, the pressure
The casing wall top at power cylinder both ends has the first segment discharge orifice and the second throttle orifice of radial direction, one end and the pressure of first segment discharge orifice
The left chamber of power cylinder is communicated, and the other end is communicated with the oil groove of end cover, and oil groove is communicated with low-pressure oil storage area, and the one of the second throttle orifice
End is communicated with the right chamber of pressure cylinder, and the other end is communicated with the outage on bottom valve.
The endoporus of the end cover is provided with the first seal coordinated with piston rod.
Be fixed with two oil pipes on the end cover, two ends for oil pipe respectively with the second oil sucting one-way valve and low pressure
Reserve communicates, and another two ends of oil pipe communicate with tensile side proportioning valve and low-pressure oil storage area respectively, two equal positions of oil pipe
In low-pressure oil storage area bottom, length is extended near bottom valve from end cover.
Equipped with two second seals coordinated with the outer surface of pressure cylinder, two second seals on the end cover
Respectively positioned at the both sides of first segment discharge orifice.
The 3rd seal coordinated equipped with the inner surface with pressure cylinder on the piston.
The 4th seals equipped with two with the cooperation of the outer surface of pressure cylinder on the adapter sleeve of the bottom valve, two the 4th close
Sealing is respectively positioned at the both sides of the second throttle orifice.
The fastener is threadedly secured to one end of oil storage cylinder.
Second oil sucting one-way valve and tensile side proportioning valve are mounted in the bottom of end cover.
After using said structure, the stretching damping characteristic of anti-hunting damper holder of the invention, by the drawing being arranged on piston
Stretch the first oil suction list on the tensile side proportioning valve on side overflow valve, end cap, the first segment discharge orifice on pressure cylinder and bottom valve
Completed to valve etc.；The compressed side damping characteristic of anti-hunting damper holder of the invention, by be arranged on piston compressed side overflow valve,
The second throttle orifice on compressed side proportioning valve, pressure cylinder on bottom valve and the second oil sucting one-way valve on end cap etc. are completed,
Therefore, can reach more accurate approximate friction-type damping characteristic；
When anti-hunting damper holder compression of the invention and stretching, the left chamber of pressure cylinder or the fluid of right chamber can be done directly on
Corresponding orifice valve, damping produces speed, and sensitivity is high；
The compression of anti-hunting damper holder of the invention and stretching damping force are completed by independent orifice valve, even if pressure cylinder two
The asymmetric setting of catchment area of side chamber, can still realize theoretic symmetrical damping characteristic；
The first segment discharge orifice of anti-hunting damper holder of the invention, the second throttle orifice are in pressure cylinder both sides upper inside wall, can
Residual air in pressure cylinder is gradually emptied in motion process, it is ensured that resistance of shock absorber stability；Structure cloth of the invention
Put can obviously reduce shock absorber assembling, transport and use during pressure cylinder suck air possibility, it is ensured that shock absorber
The stability of energy.
Brief description of the drawings
The present invention is further detailed explanation for the embodiment be given below in conjunction with accompanying drawing.
Fig. 1 is the sectional view of the structural representation of anti-hunting damper holder of the invention, i.e. Fig. 3 along line A-A；Fig. 2 is this hair
The structural representation of bright anti-hunting damper holder (after turning an angle), i.e. Fig. 3 along line B-B sectional view；
Fig. 3 is the cross-sectional view of the end cover in the present invention.
Specific embodiment
As shown in Figures 1 to 3, a kind of anti-hunting damper holder of the invention, including piston rod 1, piston 7, pressure cylinder 17, sealing
End cap 3, oil storage cylinder 6, bottom valve 15 and fastener 2, wherein one end of the piston rod 1 stretches into pressure cylinder 17 and end load is lived
Plug 7, the other end of piston rod 1 is stretched out outside end cover 3, and shaft is slidingly sealed cooperation, bottom valve with the endoporus of end cover 3
15 are arranged on the inner bottom part of oil storage cylinder 6, and pressure cylinder 17 is fixed between bottom valve 15 and end cover 3, pressure cylinder 17 and oil storage cylinder 6 it
Between gap be low-pressure oil storage area 16, end cover 3 is located at one end of oil storage cylinder 6, and by fastener 2 and pressure cylinder 17
One end offsets, and piston 7 is located in pressure cylinder 17 and is slidingly sealed cooperation, left side and the end cover 3 of piston 7 with pressure cylinder 17
Between formed left chamber 5, between the right side of piston 7 and bottom valve 15 formed right chamber 9, equipped with compressed side ratio on the bottom valve 15
The oil sucting one-way valve 13 of valve 11 and first, compressed side with the two ends of the oil sucting one-way valve 13 of proportioning valve 11 and first respectively with pressure cylinder
17 right chambers 9 and low-pressure oil storage area 16 communicate, and there is the bottom valve 15 adapter sleeve 15-1, adapter sleeve 15-1 to be enclosed within the right side of pressure cylinder 17
End periphery, is provided with outage 15-1-1 that is downward opening and being communicated with low-pressure oil storage area 16, bottom valve on adapter sleeve 15-1
15 bottoms are provided with oil suction groove 26 that is downward opening and being communicated with low-pressure oil storage area 16, are used equipped with compressed side on the piston 7
Overflow valve 8 and tensile side overflow valve 19, are equipped with the tensile side oil sucting one-way valve of proportioning valve 25 and second on the end cover 3
23, tensile side with the two ends of the oil sucting one-way valve 23 of proportioning valve 25 and second respectively with the left chamber 5 of pressure cylinder 17 and low-pressure oil storage area
16 communicate, and the casing wall top at the both ends of the pressure cylinder 17 has the throttle orifice 10 of first segment discharge orifice 4 and second of radial direction, the
One end of one throttle orifice 4 is communicated with the left chamber 5 of pressure cylinder 17, and the other end is communicated with the oil groove 3-1 of end cover 3, oil groove 3-1 with
Low-pressure oil storage area 16 communicates, and one end of the second throttle orifice 10 communicates with the right chamber 9 of pressure cylinder 17, the row on the other end and bottom valve 15
Oilhole 15-1-1 is communicated.
As shown in Figure 1, 2, the endoporus of the end cover 3 is provided with the first seal 24 coordinated with piston rod 1.
As shown in Figure 1, 2, be fixed with two oil pipes 20,21 on the end cover 3, two ends for oil pipe 20 respectively with
Second oil sucting one-way valve 23 and low-pressure oil storage area 16 communicate, another two ends of oil pipe 21 respectively with tensile side with proportioning valve 25 and
Low-pressure oil storage area 16 communicates, and two oil pipes 21 are respectively positioned on the bottom of low-pressure oil storage area 16, and length extends to bottom valve 15 from end cover 3
Near.
As shown in Figure 1, 2, equipped with two second seals coordinated with the outer surface of pressure cylinder 17 on the end cover 3
22, two second seals 22 are respectively positioned at the both sides of first segment discharge orifice 4.
As shown in Figure 1, 2, the 3rd seal 18 for coordinating equipped with the inner surface with pressure cylinder 17 on the piston 7.
As shown in Figure 1, 2, two are equipped with the adapter sleeve 15-1 of the bottom valve 15 with the outer surface cooperation of pressure cylinder 17
4th seal 14, two the 4th seals 14 are respectively positioned at the both sides of the second throttle orifice 10.
As shown in Figure 1, 2, the fastener 2 is threadedly secured to one end of oil storage cylinder 6.
As shown in Figure 1, 2, 3, second oil sucting one-way valve 23 and tensile side proportioning valve 25 are mounted in end cover (3)
Bottom.
As shown in Figure 1, 2, 3, the course of work of anti-hunting damper holder of the invention is as follows,
First, when anti-hunting damper holder is in compression travel：
During in ratio state, the fluid of the right chamber 9 of pressure cylinder 17 is by the second throttle orifice 10 and the bottom valve 15 opened
Compressed side enter the low-pressure oil storage area 16 of oil storage cylinder 6 with proportioning valve 11, and the left chamber 5 of pressure cylinder 17 is due to negative pressure, will be by close
The second oil sucting one-way valve 23 on end-blocking lid 3 is pumped from the low-pressure oil storage area 16 of oil storage cylinder 6.Thus the ratio resistance of shock absorber is produced
Damping characteristics.
During in overflow situation, the fluid of the right chamber 9 of pressure cylinder 17 is not only entered by the second throttle orifice 10 and bottom valve 15
The low-pressure oil storage area 16 of oil storage cylinder 6, part fluid can also enter a left side for pressure cylinder 17 from the compressed side on piston 7 with overflow valve 8
Chamber 5.Thus the overflow damping characteristic of shock absorber is produced.
2nd, when anti-hunting damper holder is in stretching travel：
During in ratio state, the fluid of the left chamber 5 of pressure cylinder 17 is by first segment discharge orifice 4 and the end cover 3 opened
On tensile side enter the low-pressure oil storage area 16 of oil storage cylinder 6, and the right chamber 9 of pressure cylinder 17 with proportioning valve 25 due to negative pressure, will be logical
The first oil sucting one-way valve 13 crossed on bottom valve 15 is pumped from the low-pressure oil storage area 16 of oil storage cylinder 6, now produces the ratio of shock absorber
Damping characteristic.
During in overflow situation, the fluid of the left chamber 5 of pressure cylinder 17 is not only by first segment discharge orifice 4 and tensile side ratio
Valve 25 enters oil storage cylinder 6, and part fluid can also enter the right chamber 9 of pressure cylinder 17 from the tensile side on piston 7 with overflow valve 19.Two
Secondary fluid difference in areas is away from can make the right chamber 9 of pressure cylinder 17 can still form negative pressure, by by the first oil sucting one-way valve on bottom valve 15
13 pump from the low-pressure oil storage area 16 of oil storage cylinder 6, now produce the turbulent behavior of shock absorber.
Claims (8)
1. a kind of anti-hunting damper holder, including piston rod (1), piston (7), pressure cylinder (17), end cover (3), oil storage cylinder
(6), bottom valve (15) and fastener (2), wherein one end of the piston rod (1) is stretched into pressure cylinder (17) and end load piston
(7), the other end of piston rod (1) is stretched out outside end cover (3), and shaft is slidingly sealed with the endoporus of end cover (3) and matches somebody with somebody
Close, bottom valve (15) is fixed between bottom valve (15) and end cover (3) installed in oil storage cylinder (6) inner bottom part, pressure cylinder (17), press
Gap between power cylinder (17) and oil storage cylinder (6) is low-pressure oil storage area (16), end cover (3) positioned at one end of oil storage cylinder (6),
And by fastener (2) offseted with one end of pressure cylinder (17), piston (7) in pressure cylinder (17) and with pressure cylinder (17)
Cooperation is slidingly sealed, left chamber (5), the right side and bottom of piston (7) are formed between the left side of piston (7) and end cover (3)
Right chamber (9) is formed between valve (15), it is characterised in that：
Compressed side proportioning valve (11) and the first oil sucting one-way valve (13), compressed side proportioning valve are housed on a, the bottom valve (15)
(11) respectively communicated with pressure cylinder (17) right chamber (9) and low-pressure oil storage area (16) with the two ends of the first oil sucting one-way valve (13),
, with adapter sleeve (15-1), adapter sleeve (15-1) is enclosed within the right part periphery of pressure cylinder (17) for b, the bottom valve (15), even
Outage (15-1-1) that is downward opening and being communicated with low-pressure oil storage area (16) is provided with female connector (15-1), under bottom valve (15)
Portion is provided with oil suction groove (26) that is downward opening and being communicated with low-pressure oil storage area (16),
Compressed side overflow valve (8) and tensile side overflow valve (19) are housed on c, the piston (7),
On d, the end cover (3) be equipped with tensile side proportioning valve (25) and the second oil sucting one-way valve (23), tensile side with than
Example valve (25) and the second oil sucting one-way valve (23) two ends respectively with pressure cylinder (17) left chamber (5) and low-pressure oil storage area (16) phase
It is logical,
E, the casing wall top at the pressure cylinder (17) both ends have the first segment discharge orifice (4) and the second throttle orifice of radial direction
(10), one end of first segment discharge orifice (4) communicates with the left chamber (5) of pressure cylinder (17), the oil groove of the other end and end cover (3)
(3-1) is communicated, and oil groove (3-1) is communicated with low-pressure oil storage area (16), one end of the second throttle orifice (10) and the right side of pressure cylinder (17)
Chamber (9) is communicated, and the other end is communicated with the outage (15-1-1) on bottom valve (15)；
When the ratio state in compression travel, the fluid of the right chamber (9) of the pressure cylinder (17) passes through the second throttle orifice
(10) the compressed side proportioning valve (11) into the low-pressure oil storage area (16) of oil storage cylinder (6) and on the bottom valve (15) of opening, and institute
Pressure cylinder (17) left chamber (5) are stated by the second oil sucting one-way valve (23) on end cover (3) from the low-pressure oil storage of oil storage cylinder (6)
Pump in area (16)；
When the overflow situation in compression travel, the fluid of the right chamber (9) of the pressure cylinder (17) passes through the second throttle orifice
(10) use and overflow into the low-pressure oil storage area (16) of oil storage cylinder (6), and compressed side of the part fluid from piston (7) with bottom valve (15)
Stream valve (8) enters the left chamber (5) of pressure cylinder (17)；
When the ratio state in stretching travel, the fluid of the left chamber (5) of the pressure cylinder (17) passes through first segment discharge orifice (4)
With the low-pressure oil storage area (16) that the tensile side on the end cover (3) opened enters oil storage cylinder (6) with proportioning valve (25), it is and described
The right chamber (9) of pressure cylinder (17) will be by the first oil sucting one-way valve (13) on bottom valve (15) from the low-pressure oil storage of oil storage cylinder (6)
Pump in area (16)；
When the overflow situation in stretching travel, the fluid of the left chamber (5) of the pressure cylinder (17) passes through first segment discharge orifice (4)
Enter oil storage cylinder (6) with proportioning valve (25) with tensile side, and tensile side overflow valve (19) of the part fluid from piston (7) enters
Enter the right chamber (9) of pressure cylinder (17)；The right chamber (9) of the pressure cylinder (17) is by the first oil sucting one-way valve on bottom valve (15)
(13) pumped from the low-pressure oil storage area (16) of oil storage cylinder (6).
2. anti-hunting damper holder according to claim 1, it is characterised in that：The endoporus of the end cover (3) be provided with
The first seal (24) that piston rod (1) coordinates.
3. anti-hunting damper holder according to claim 1, it is characterised in that：Two are fixed with the end cover (3)
Oil pipe (20,21) a, two ends for oil pipe (20) communicate with the second oil sucting one-way valve (23) and low-pressure oil storage area (16) respectively, separately
A piece two ends for oil pipe (21) communicate with tensile side proportioning valve (25) and low-pressure oil storage area (16) respectively, and two oil pipes (21) are
Positioned at low-pressure oil storage area (16) bottom, length is extended near bottom valve (15) from end cover (3).
4. anti-hunting damper holder according to claim 1, it is characterised in that：On the end cover (3) equipped with two with
The second seal (22) that the outer surface of pressure cylinder (17) coordinates, two second seals (22) are located at first segment discharge orifice respectively
(4) both sides.
5. anti-hunting damper holder according to claim 1, it is characterised in that：It is equipped with and pressure cylinder on the piston (7)
(17) the 3rd seal (18) that inner surface coordinates.
6. anti-hunting damper holder according to claim 1, it is characterised in that：On the adapter sleeve (15-1) of the bottom valve (15)
Equipped with two the 4th seals (14) coordinated with the outer surface of pressure cylinder (17), two the 4th seals (14) are located at the respectively
The both sides of two throttle orifices (10).
7. anti-hunting damper holder according to claim 1, it is characterised in that：The fastener (2) is threadedly secured to
One end of oil storage cylinder (6).
8. anti-hunting damper holder according to claim 1, it is characterised in that：Second oil sucting one-way valve (23) and stretching
Side proportioning valve (25) is mounted in the bottom of end cover (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210522498.9A CN103851121B (en) | 2012-12-07 | 2012-12-07 | Snaking prevention shock absorber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210522498.9A CN103851121B (en) | 2012-12-07 | 2012-12-07 | Snaking prevention shock absorber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103851121A CN103851121A (en) | 2014-06-11 |
| CN103851121B true CN103851121B (en) | 2017-05-24 |
Family
ID=50859133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210522498.9A Active CN103851121B (en) | 2012-12-07 | 2012-12-07 | Snaking prevention shock absorber |
Country Status (1)
| Country | Link |
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| CN (1) | CN103851121B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108150582B (en) * | 2017-12-30 | 2024-03-29 | 珠海市业成轨道交通设备科技有限公司 | Oil return valve system of guide cover of anti-meandering oil pressure shock absorber for high-speed motor train |
| CN108167369A (en) * | 2017-12-30 | 2018-06-15 | 珠海市业成轨道交通设备科技有限公司 | A kind of high speed motor car oil-pressure damper pressure cylinder open-celled structure |
| CN109737175B (en) * | 2018-12-29 | 2024-03-29 | 珠海市业成轨道交通设备科技有限公司 | Piston assembly for double-circulation anti-meandering oil pressure shock absorber of high-speed motor train |
| CN110091888B (en) * | 2019-04-19 | 2020-04-28 | 中车青岛四方机车车辆股份有限公司 | Control method and device of anti-snaking shock absorber |
| CN111895025A (en) * | 2020-06-30 | 2020-11-06 | 河海大学常州校区 | Hydraulic damper with external leakage service prevention function |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61156743U (en) * | 1985-03-22 | 1986-09-29 | ||
| JPH0650375A (en) * | 1992-07-31 | 1994-02-22 | Kayaba Ind Co Ltd | Buffer device |
| DE102006054257A1 (en) * | 2006-11-17 | 2008-05-29 | Zf Friedrichshafen Ag | Vibration damper with amplitude-dependent damping force |
| JP2009209960A (en) * | 2008-02-29 | 2009-09-17 | Hitachi Ltd | Shock absorber |
| JP5424166B2 (en) * | 2009-06-26 | 2014-02-26 | 日立オートモティブシステムズ株式会社 | Horizontal cylinder device |
| CN201896904U (en) * | 2010-07-23 | 2011-07-13 | 常州朗锐凯迩必减振技术有限公司 | Damping valve structure of oil damper |
| JP5812650B2 (en) * | 2011-03-31 | 2015-11-17 | 日立オートモティブシステムズ株式会社 | Damping force adjustable shock absorber |
| CN203009683U (en) * | 2012-12-07 | 2013-06-19 | 常州朗锐凯迩必减振技术有限公司 | Serpentine-resistant damper |
-
2012
- 2012-12-07 CN CN201210522498.9A patent/CN103851121B/en active Active
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| CN103851121A (en) | 2014-06-11 |
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Address after: 213125 Jiangsu province Changzhou City New District Xue Shun Road No. 19 Co-patentee after: CRRC QISHUYAN INSTITUTE Co.,Ltd. Patentee after: CHANGZHOU KYB LEADRUN VIBRATION REDUCTION TECHNOLOGY CO.,LTD. Address before: 213125 Jiangsu province Changzhou City New District Xue Shun Road No. 19 Co-patentee before: CSR QISHUYAN INSTITUTE Co.,Ltd. Patentee before: CHANGZHOU KYB LEADRUN VIBRATION REDUCTION TECHNOLOGY CO.,LTD. |
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Address after: 213125 Jiangsu province Changzhou City New District Xue Shun Road No. 19 Patentee after: CHANGZHOU KYB LEADRUN VIBRATION REDUCTION TECHNOLOGY CO.,LTD. Country or region after: China Patentee after: CRRC Qishuyan Locomotive and Rolling Stock Technology Research Institute Co.,Ltd. Address before: 213125 Jiangsu province Changzhou City New District Xue Shun Road No. 19 Patentee before: CHANGZHOU KYB LEADRUN VIBRATION REDUCTION TECHNOLOGY CO.,LTD. Country or region before: China Patentee before: CRRC QISHUYAN INSTITUTE Co.,Ltd. |
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