CN204279483U - A kind of can the guideway vehicle of overall lifting - Google Patents
A kind of can the guideway vehicle of overall lifting Download PDFInfo
- Publication number
- CN204279483U CN204279483U CN201420799791.4U CN201420799791U CN204279483U CN 204279483 U CN204279483 U CN 204279483U CN 201420799791 U CN201420799791 U CN 201420799791U CN 204279483 U CN204279483 U CN 204279483U
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- China
- Prior art keywords
- connecting member
- bolster
- bogie truck
- car body
- flexible connecting
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Abstract
The utility model relate to a kind of can the guideway vehicle of overall lifting, comprise bogie truck, car body or bolster, between bogie truck and car body or bolster, lift is installed, described lift comprises secondary spring and flexible connecting member, described secondary spring is steel coil spring, described flexible connecting member is arranged on the centre of described secondary spring, and the top of described flexible connecting member is connected with car body or bolster by upper connecting portion, and the bottom of described flexible connecting member is connected with bogie truck by lower connecting portion.The utility model uses flexible connecting member car body, bolster and bogie truck to be linked together, flexible connecting member itself has bendable folding endurance, the requirement of relative motion between car body and bogie truck can be met, therefore can run with car, without the need to other Assembly &Disassembly during lifting, very easy to use, and flexible connecting member is arranged on the centre of the steel coil spring as secondary spring, structure is compacter, reasonably uses steel spring internal structural space, decreases taking of space.
Description
Technical field
The utility model relates to a kind of guideway vehicle, particularly a kind of have by car body and bogie truck integral lifting can the guideway vehicle of overall lifting, belong to guideway vehicle manufacturing technology field.
Background technology
Guideway vehicle is made up of car body and bogie truck, realizes carrying, realize bogie truck to car body transmitting tractive power and braking force by drawing pull bar between car body and bogie truck by secondary spring.Traditional guideway vehicle is respectively arranged with the overhead hoist such as handle hole on bogie truck and car body, if there is abnormal condition during guideway vehicle runs, and when needing car body and bogie truck Integral lifting, need before lifting, between bogie truck and car body, multiple rigid hanger is installed, the two ends of suspension rod are connected with the handle hole of bogie truck and car body respectively, born the self gravitation of bogie truck by multiple rigid hanger, make car body and bogie truck stable connection and by Integral lifting.Guideway vehicle is when high-speed cruising, the relative motion such as can deflect between bogie truck and car body, traversing, therefore vehicle is when normally running, the suspension rod of rigidity can not be arranged on car body, must remove, equally, because deflection and the relative motion such as traversing, make suspension rod comparatively difficult when mounted, even cannot install.Particularly for low-floor rail vehicle, because of its compact conformation, the factors such as limited space, bring certain obstacle to the overall lifting of bogie truck and car body.
In order to solve the problem, be in the Chinese patent " locomotive car body and bogie truck Integral lifting connecting device " of 201020168002.9 in the patent No., disclose and be connected with lifting chain link between car body and bogie truck, the flap seat hole of vehicle bottom is connected with the flap seat hole in the middle part of bogie truck with bolt by lifting chain link, lifting chain link is the becket interlocked, and the two ends of becket are pyriform.During vehicle operating, secondary spring is compressed due to bearing body, produces gap, can stretch, rotate, therefore can meet the requirement of relative motion between car body and bogie truck between the ring of lifting chain link.In this device, lifting chain link is arranged separately between car body and bogie truck, needs to take the space between certain bogie truck and car body, and in vehicle high-speed operational process, there will be and produce the phenomenon of colliding with secondary spring or the miscellaneous equipment around it.
Utility model content
The utility model main purpose is to solve the problem and deficiency, can run with car again while of providing one can realize bogie truck and car body Integral lifting, and compact conformation, what realize space between reasonable utilization bogie truck and car body can the guideway vehicle of overall lifting.
For achieving the above object, the technical solution of the utility model is:
A kind of can the guideway vehicle of overall lifting, comprise bogie truck, car body or bolster, between bogie truck and car body or bolster, lift is installed, described lift comprises secondary spring and flexible connecting member, described secondary spring is steel coil spring, described flexible connecting member is arranged on the centre of described secondary spring, and the top of described flexible connecting member is connected with car body or bolster by upper connecting portion, and the bottom of described flexible connecting member is connected with bogie truck by lower connecting portion.
Further, described flexible connecting member is chain or steel cable.
Further, at arranged outside one protective case of described flexible connecting member, described protective case is fixedly connected with upper connecting portion.
Further, be also provided with the expanding structure for strutting described protective case in the outside of described flexible connecting member, the bottom of described expanding structure is fixedly connected with lower connecting portion.
Further, described expanding structure is at least two panels sheetmetal be arranged on outside described flexible connecting member, has a U-shaped structure outwards turned down at the top of described sheetmetal, and the side support of described U-shaped structure is on the inwall of described protective case.
Further, described upper connecting portion is made up of upper connector, upper connecting pin and upper connecting base, described upper connecting base is fixed on described car body or bolster, described upper connector is connected with described upper connecting base by upper connecting pin, and top and the described upper connector of described flexible connecting member are rotationally connected by bolt or bearing pin.
Further, described upper connecting base is T-shaped, and described car body or bolster are provided with T-shaped counterbore, and described upper connecting base is stuck in described T-shaped counterbore, and bottom protrudes through upper connecting pin and is connected with described upper connector in described T-shaped counterbore.
Further, connect and fix between described lower connecting portion and described bogie truck, bottom and the described lower connecting portion of described flexible connecting member are rotationally connected by bolt or bearing pin.
Further, described bogie truck has ringwise boss, have back-off at the inwall top of described boss, the waist of described lower connecting portion has the platform of annular, and described platform coordinates realization to connect and fix with described back-off.
Further, described secondary spring is two steel coil springs, and be made up of interior spring and outer spring, described secondary spring has upper padding plate and lower bolster, connects and fixes between described upper padding plate and lower bolster and car body or bolster and bogie truck.
To sum up content, described in the utility model a kind of can the guideway vehicle of overall lifting, compared with prior art, tool has the following advantages:
(1) the utility model uses flexible connecting member car body, bolster and bogie truck to be linked together, flexible connecting member itself has bendable folding endurance, the requirement of relative motion between car body and bogie truck can be met, therefore can run with car, without the need to other Assembly &Disassembly during lifting, very easy to use.
(2) adopt the flexible connecting structure such as chain due to lift, and flexible connecting member is arranged on the centre of the steel coil spring as secondary spring, structure is compacter, reasonably uses steel spring internal structural space, decreases taking of space.
(3) lift arranges protective case in flexible connecting member periphery, flexible connecting member and steel coil spring is separated, avoid the rigid contact between flexible connecting member and steel coil spring by protective case.
(4) be between the lift in the utility model, secondary spring and bogie truck, car body or bolster and connect and fix, package unit connects without the need to other fasteners, is easy to installing/dismounting and maintenance, decreases the operation and maintenance of fastener.
(5) the utility model is specially adapted to the low floor city railway vehicle of space anxiety between car body and bogie truck.
Accompanying drawing explanation
Fig. 1 is the utility model lift structural representation;
Fig. 2 is the utility model chain structure schematic diagram;
Fig. 3 is the utility model protective case structural representation.
As shown in Figure 1 to Figure 3, bolster 1, bogie truck 2, secondary spring 3, overall lift 4, flexible connecting member 5, upper connecting portion 6, lower connecting portion 7, connecting panel 8, connecting pin 9, upper connector 10, upper connecting pin 11, upper connecting base 12, bearing pin 13, T-shaped counterbore 14, adapter plate 15, boss 16, back-off 17, platform 18, groove 19, limiting stopper 20, bearing pin 21, protective case 22, liner 23, screw 24, sheetmetal 25, U-shaped structure 26, screw 27, sheared edge 28, upper padding plate 29, upper strata metal sheet 29a, lower metal plate 29b, rubber layer 29c, lower bolster 30, centre hole 31, installation portion 32, interior spring 33, outer spring 34, first cavity 35, first projection 36, second cavity 37, positioning seat 38, second projection 39, interior spring adjusting pad 40, outer spring adjusting pad 41.
Detailed description of the invention
Below in conjunction with accompanying drawing and detailed description of the invention, the utility model is described in further detail:
As shown in Figure 1, the utility model provide a kind of can the guideway vehicle of overall lifting, comprise bolster 1 and bogie truck 2, secondary spring 3 be installed between bolster 1 and bogie truck 2 and for the overall lift 4 by car body, bolster 1 and bogie truck 2 integral lifting.For the guideway vehicle not having bolster 1, secondary spring 3 and overall lift 4 are arranged between bogie truck 2 and car body (not shown).In the present embodiment, secondary spring 3 adopts steel coil spring, particularly preferably adopts double-deck steel coil spring, can certainly adopt the steel coil spring of individual layer.
As depicted in figs. 1 and 2, the overall lift 4 of the one that the utility model provides comprises flexible connecting member 5, flexible connecting member 5 is arranged on the centre of the clad steel coil spring of secondary spring 3, the top of flexible connecting member 5 is fixedly connected with bolster 1 by upper connecting portion 6, for the guideway vehicle not having bolster 1, the top of flexible connecting member 5 is directly fixedly connected with car body by upper connecting portion 6.The bottom of flexible connecting member 5 is connected with bogie truck 2 by lower connecting portion 7.According to different vehicles, four secondary springs 3 are installed between bolster 1 and bogie truck 2, in the middle of each secondary spring 3, a flexible connecting member 5 are installed.Flexible connecting member 5 is arranged on the centre of secondary spring 3, while reaching lifting effect, make the structure of overall lift 4 compacter, reasonably use steel spring internal structural space, decrease taking of space, make this device be specially adapted to the low floor city railway vehicle of space anxiety between car body and bogie truck.
Flexible connecting member 5 can adopt chain or steel cable etc., because chain or steel cable itself have bendable folding endurance, can meet the requirement of relative motion between car body and bogie truck, therefore can run with car, without the need to the other Assembly &Disassembly when lifting by crane, use more convenient, and reduce the space taken.In the present embodiment, flexible connecting member 5 preferably adopts the chain that load-carrying capacity is stronger, as shown in Figure 2, chain is made up of more piece chain link, every pitch chain joint comprises two pieces of parallel connecting panels 8, being connected by connecting pin 9 between the connecting panel 8 of adjacent two joints, is proof strength and corrosion stability, chain strip adoption stainless steel chain.Simultaneously, in order to ensure safety during integral lifting, the intensity of every root flexible connecting member 5 all will ensure the load bearing requirements that whole bogie truck lifts by crane, namely other chain fracture cannot use time, only utilize a chain also can to sling bogie truck 2, complete the integral lifting of car body and bogie truck, ensure safety during lifting, avoid safety misadventure occurs.
As depicted in figs. 1 and 2, the upper connecting portion 6 of overall lift 4 is made up of upper connector 10, upper connecting pin 11 and upper connecting base 12, upper connector 10 is rotationally connected with upper connecting base 12 by upper connecting pin 11, upper connecting base 12 is fixed on bolster 1, and the top of flexible connecting member 5 and upper connector 10 are rotationally connected by bolt or bearing pin 13.
In the present embodiment, in order to easy installation and removal, be easy to repair and maintenance, preferred upper connecting base 12 is fixedly connected with adopting the mode connected and fixed between bolster 1, connects, decrease the operation and maintenance of fastener without the need to fastener.As shown in Figure 1, upper connecting base 12 is the framing member of a T-shaped, bolster 1 is correspondingly provided with a T-shaped counterbore 14, upper connecting base 12 is stuck in T-shaped counterbore 14, bottom is stretched out in T-shaped counterbore 14, the top of upper connector 10 has two adapter plates be arranged in parallel 15, and the bottom of upper connecting base 12 is inserted between two adapter plates 15 and linked together by upper connecting pin 11.
Lower connecting portion 7 is fixedly connected with also adopting the mode connected and fixed between bogie truck 2, and easy installation and removal, is easy to repair and maintenance.Bogie truck 2 has the ringwise boss 16 raised up, at the inwall top of boss 16, there is back-off 17, the waist of lower connecting portion 7 has the platform 18 of annular, platform 18 can be outwardly platform, also can be as shown in Figure 1, arrange a ringwise groove 19 at the waist of lower connecting portion 7, namely the base plane of groove 19 is formed as platform 18.
During installation, the bottom of lower connecting portion 7 is stuck in boss 16, utilizes platform 18 to coordinate realization to connect and fix with back-off 17.In order to reduce installation difficulty, ensure that in operation, each parts can not produce relative motion simultaneously, avoid producing noise, as shown in Figure 1, at least two pieces of limiting stoppers 20 are also provided with between lower connecting portion 7 and boss 16, limiting stopper 20 is two-stage step-like structure, during installation, the bottom of lower connecting portion 7 is arranged in boss 16, the bottom of lower connecting portion 7 is resisted against on bogie truck 2, two pieces or three pieces of limiting stoppers 20 are inserted between lower connecting portion 7 and boss 16, utilize the step-like structure in the interior outside of limiting stopper 20 to fix with the groove 19 on lower connecting portion 7 and the back-off in boss 16 17 respectively to coordinate, realize lower connecting and fixing between connecting portion 7 and boss 16, the bottom of flexible connecting member 5 and the top of lower connecting portion 7 are rotationally connected by bolt or bearing pin 21, and then the bottom of flexible connecting member 5 and bogie truck 2 are fixed together.
When integral lifting, suspender is arranged on car body, is sling by car body, and bolster 1 is fixed on car body, and bolster 1 lifts thereupon, and bolster 1 upwards pulls chain by upper connecting portion 6, and chain is sling the bogie truck 2 of bottom, and then completes the integral lifting of car body and bogie truck.Be provided with two bogie trucks 2 owing to often saving compartment, therefore, be symmetrically arranged with eight chains before and after between car body and bogie truck, during lifting, there will not be the phenomenon of deflection.
As shown in Figure 1; at arranged outside one protective case 22 of flexible connecting member 5, protective case 22 is the tubular structure be made up of High molecular material, and protective case 22 by chain guard wherein; play the effect of protection, prevent chain and the peripheral steel coil spring brought during the too small curve of vehicle " staggering along " simultaneously.As shown in Figure 3; the liner 23 of an annular is provided with between the inwall and the outer wall of upper connector 10 of protective case 22; liner 23 can be installed separately; also can sulfide with upper connector 10; more adding method is quick to make installation, the top of protective case 22 be fixed together by screw 24 together with liner 23 between upper connector 10.
Safeguard for the ease of maintenance repair, the bottom of protective case 22 is unsettled, in the present embodiment, outside bottom chain is provided with the expanding structure for strutting protective case 22 in addition, expanding structure is at least two panels sheetmetal 25 around chain arranged outside, the top of sheetmetal 25 has a U-shaped structure 26 outwards turned down, U-shaped structure 26 has certain elasticity, utilize the side support of U-shaped structure 26 on the inwall of protective case 22, sheetmetal 25 pairs of protective cases 22 play the effect of certain support, the bottom of sheetmetal 25 is fixedly connected with by screw 27 with between lower connecting portion 7.
As shown in Figure 3, be also provided with 4 sheared edges 28 in the bottom of protective case 22, avoid vehicle transverse and longitudinal to move the lower end of bringing and tear phenomenon.
As shown in Figure 1, in the present embodiment, in order to improve the stability of vehicle operating, and meet the requirement of large volume of passenger traffic carrying, secondary spring 3 adopts two steel coil spring, and be made up of interior spring 33 and outer spring 34, the two ends up and down of secondary spring 3 are respectively arranged with upper padding plate 29 and lower bolster 30.
Upper padding plate 29 is made up of the rubber layer 29c of upper strata metal sheet 29a, lower metal plate 29b and centre, and rubber layer 29c and upper strata metal sheet 29a, lower metal plate 29b sulfide, and upper padding plate 29 has a centre hole 31.Correspondingly, bolster 1 arranges first cavity 35, have the installation portion 32 protruded downwards at the center of the first cavity 35, installation portion 32 matches with centre hole 31, just opens at installation portion 32 for the T-shaped counterbore 14 fixing with upper connecting base 12.The diameter of the first cavity 35 coordinates with the upper padding plate 29 of secondary spring 3, upper padding plate 29 is made to be stuck in the first cavity 35 and to realize fixing, centre hole 31 is stuck in installation portion 32 place simultaneously, and then realize being fixedly connected with of upper padding plate 29 and bolster 1, without the need to adopting traditional bolted mode between upper padding plate 29 and bolster 1, make installing/dismounting more simple and convenient, decrease the operation and maintenance of fastener, and make secondary suspension device structure more compact, with the low floor city railway vehicle making this device be more suitable for space anxiety between car body and bogie truck.
Due to the restriction of space structure, the lower surface of the lower metal plate 29b of upper padding plate 29 has ringwise first projection 36, first projection 36 is between interior spring 33 and outer spring 34, and first protruding 36 is metal sheet, with lower metal plate 29b weld together or one-body molded.
The diameter that bogie truck 2 is provided with the second cavity 37, second cavity 37 coordinates with the lower bolster 30 of secondary spring 3, makes lower bolster 30 be stuck in the second cavity 37 and realize fixing.Lower bolster 30 is made up of positioning seat 38 and adjusting pad, positioning seat 38 be metal sheet, the upper surface of positioning seat 38 has equally ringwise second projection 39, second projection 39 is between interior spring 33 and outer spring 34, second protruding 39 is metal sheet, with positioning seat 38 weld together or one-body molded.After installation, the bottom of positioning seat 38 fixes and realizes being fixedly connected with between secondary spring 3 with bogie truck 2 in the bottom of the second cavity 37 of bogie truck 1, same without the need to adopting traditional bolted mode between lower bolster 30 with bogie truck 2, make installing/dismounting more simple and convenient, decrease the operation and maintenance of fastener, also make secondary suspension device structure more compact further.
First protruding 36 and second protruding 39 1 aspects serve damping of vibrations, on the other hand, interior spring 33 and outer spring 34 are separated by this " projection " structure, when vehicle needs by little curve, namely when secondary spring 3 produces Large travel range, decrease the possibility of interior spring 33 and outer spring 34 collision, efficiently avoid the unstability of secondary spring 3.
The adjusting pad of lower bolster 30 is divided into two kinds of different structures, one is interior spring adjusting pad 40, interior spring adjusting pad 40 is metal gasket, be arranged on the inner ring of the second projection 39 and the bottom of interior spring 33, for the adjustment of spring 33 in legal load compression relative superiority or inferiority, another kind is outer spring adjusting pad 41, outer spring adjusting pad 41 is metal gasket, be arranged on the outer ring of the second projection 39 and the bottom of outer spring 34, for the adjustment of outer spring 34, with ensure interior spring 33 and the compression of outer spring 34 under same working load high, and then ensure operating steadily between car body and bogie truck.Meanwhile, upper padding plate 29 and lower bolster 30 utilize the elasticity of rubber layer 29c to significantly reduce vibration that steel spring brings and impact.
The second cavity 37 on bogie truck 2 is inverted cone-shaped structure, while fixing secondary spring 3, also can avoid when vehicle operating, and the inwall of secondary spring 3 and the second cavity 37 collides.
As mentioned above, plan content given by reference to the accompanying drawings, can derive similar technical scheme.In every case be the content not departing from technical solutions of the utility model, any simple modification done above embodiment according to technical spirit of the present utility model, equivalent variations and modification, all still belong in the scope of technical solutions of the utility model.
Claims (10)
1. one kind can the guideway vehicle of overall lifting, comprise bogie truck, car body or bolster, it is characterized in that: between bogie truck and car body or bolster, lift is installed, described lift comprises secondary spring and flexible connecting member, described secondary spring is steel coil spring, described flexible connecting member is arranged on the centre of described secondary spring, and the top of described flexible connecting member is connected with car body or bolster by upper connecting portion, and the bottom of described flexible connecting member is connected with bogie truck by lower connecting portion.
2. according to claim 1 a kind of can the guideway vehicle of overall lifting, it is characterized in that: described flexible connecting member is chain or steel cable.
3. according to claim 1 a kind of can the guideway vehicle of overall lifting, it is characterized in that: at arranged outside one protective case of described flexible connecting member, described protective case is fixedly connected with upper connecting portion.
4. according to claim 3 a kind of can the guideway vehicle of overall lifting, it is characterized in that: be also provided with the expanding structure for strutting described protective case in the outside of described flexible connecting member, the bottom of described expanding structure is fixedly connected with lower connecting portion.
5. according to claim 4 a kind of can the guideway vehicle of overall lifting; it is characterized in that: described expanding structure is at least two panels sheetmetal be arranged on outside described flexible connecting member; have a U-shaped structure outwards turned down at the top of described sheetmetal, the side support of described U-shaped structure is on the inwall of described protective case.
6. a kind of according to any one of claim 1 to 5 can the guideway vehicle of overall lifting, it is characterized in that: described upper connecting portion is made up of upper connector, upper connecting pin and upper connecting base, described upper connecting base is fixed on described car body or bolster, described upper connector is connected with described upper connecting base by upper connecting pin, and top and the described upper connector of described flexible connecting member are rotationally connected by bolt or bearing pin.
7. according to claim 6 a kind of can the guideway vehicle of overall lifting, it is characterized in that: described upper connecting base is T-shaped, described car body or bolster are provided with T-shaped counterbore, described upper connecting base is stuck in described T-shaped counterbore, and bottom protrudes through upper connecting pin and is connected with described upper connector in described T-shaped counterbore.
8. a kind of according to any one of claim 1 to 5 can the guideway vehicle of overall lifting, it is characterized in that: connect and fix between described lower connecting portion and described bogie truck, bottom and the described lower connecting portion of described flexible connecting member are rotationally connected by bolt or bearing pin.
9. according to claim 8 a kind of can the guideway vehicle of overall lifting, it is characterized in that: on described bogie truck, there is ringwise boss, at the inwall top of described boss, there is back-off, the waist of described lower connecting portion has the platform of annular, and described platform coordinates realization to connect and fix with described back-off.
10. according to claim 1 a kind of can the guideway vehicle of overall lifting, it is characterized in that: described secondary spring is two steel coil spring, be made up of interior spring and outer spring, described secondary spring has upper padding plate and lower bolster, connects and fixes between described upper padding plate and lower bolster and car body or bolster and bogie truck.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420799791.4U CN204279483U (en) | 2014-12-16 | 2014-12-16 | A kind of can the guideway vehicle of overall lifting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420799791.4U CN204279483U (en) | 2014-12-16 | 2014-12-16 | A kind of can the guideway vehicle of overall lifting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204279483U true CN204279483U (en) | 2015-04-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420799791.4U Withdrawn - After Issue CN204279483U (en) | 2014-12-16 | 2014-12-16 | A kind of can the guideway vehicle of overall lifting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204279483U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104527717A (en) * | 2014-12-16 | 2015-04-22 | 南车青岛四方机车车辆股份有限公司 | Railway vehicle capable of being integrally elevated and hung |
| CN104890695A (en) * | 2015-06-02 | 2015-09-09 | 长春轨道客车股份有限公司 | Movable vehicle jacking device |
-
2014
- 2014-12-16 CN CN201420799791.4U patent/CN204279483U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104527717A (en) * | 2014-12-16 | 2015-04-22 | 南车青岛四方机车车辆股份有限公司 | Railway vehicle capable of being integrally elevated and hung |
| CN104527717B (en) * | 2014-12-16 | 2017-01-25 | 中车青岛四方机车车辆股份有限公司 | Railway vehicle capable of being integrally elevated and hung |
| CN104890695A (en) * | 2015-06-02 | 2015-09-09 | 长春轨道客车股份有限公司 | Movable vehicle jacking device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: Chengyang District of Shandong city of Qingdao province Jinhong road 266111 No. 88 Patentee after: CRRC QINGDAO SIFANG CO., LTD. Address before: Jihongtan town Chengyang District Shandong city Qingdao province Jinhong road 266111 No. 88 Patentee before: CSR Qingdao Sifang Locomotive and Rolling Stock Co., Ltd. |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20150422 Effective date of abandoning: 20170125 |
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| AV01 | Patent right actively abandoned |