CN110450640A - A kind of rolling stock pantograph device - Google Patents
A kind of rolling stock pantograph device Download PDFInfo
- Publication number
- CN110450640A CN110450640A CN201910763390.0A CN201910763390A CN110450640A CN 110450640 A CN110450640 A CN 110450640A CN 201910763390 A CN201910763390 A CN 201910763390A CN 110450640 A CN110450640 A CN 110450640A
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- Prior art keywords
- fixedly connected
- hook type
- rolling stock
- plate
- type bar
- Prior art date
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- 238000005096 rolling process Methods 0.000 title claims abstract description 24
- 230000000694 effects Effects 0.000 claims description 15
- 238000000034 method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 2
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L5/00—Current collectors for power supply lines of electrically-propelled vehicles
- B60L5/18—Current collectors for power supply lines of electrically-propelled vehicles using bow-type collectors in contact with trolley wire
- B60L5/20—Details of contact bow
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Current-Collector Devices For Electrically Propelled Vehicles (AREA)
Abstract
The present invention relates to technical field of rail traffic, and disclose a kind of rolling stock pantograph device, including slipping plate, the bottom of sliding plate is provided with chassis, the middle part of sliding plate lower surface is fixedly connected with the middle part of chassis top surface by balancing armed lever, is fixedly connected to hook type bar at left and right sides of sliding plate upper surface.The rolling stock pantograph device, it is limited by vertical position of the buffer unit to connection pad, then it is controlled by position of the elastic shrinkage component to connection pad horizontal direction, when rolling stock is during operating, immediately in the state of being jolted, ensure that energization cable is contacted with side any in its left and right and bottom side or two sides always, improve the smooth degree that energization cable is contacted with connection pad on pantograph device, limitation due to elastic shrinkage component to energization cable two sides connection pad and hook type bar, reduce the frictional dissipation of energization cable and connection pad or hook type bar, improve the service life of pantograph device and cable.
Description
Technical field
The present invention relates to technical field of rail traffic, specially a kind of rolling stock pantograph device.
Background technique
Pantograph device is the electrical equipment that electric energy is obtained from contact net, is mounted on locomotive or motor-car roof, pantograph
Can be divided to single armed bow and both arms bend two kinds, diamond shape pantograph, also referred to as diamond pantograph, in the past it is very universal, after due to maintenance cost
Higher and be easy to break contact net in failure and gradually be eliminated, existing pantograph device is electrically-driven car movement
When a kind of indispensable device.
Top and the energization conductive cable contacts of pantograph are generally only arranged in existing pantograph device, when rolling stock is carrying out
Track deflecting and when in of short duration jolting, be easy to cause pantograph and the touch panel of energization cable to shake, is then easy
The contact surface between pantograph and energization cable is caused to increase, then frictional force between the two increases, and causes between the two
Interaction increases, and runs at high speed process in rolling stock, and the degree of wear of pantograph device and cable easy to increase reduces
Its service life, thus it is proposed that a kind of rolling stock pantograph device.
Summary of the invention
The present invention provides a kind of rolling stock pantograph device, has and improve on energization cable and pantograph device
The smooth degree of connection pad contact, reduces the frictional dissipation of energization cable and connection pad or hook type bar, improve pantograph device and
The advantages of service life of cable, solves the problems, such as to be previously mentioned in background technique.
Be achieved in order to achieve the above object, the present invention provides the following technical solutions: a kind of rolling stock is filled with pantograph
It sets, including sliding plate, the bottom of the sliding plate is provided with chassis, the middle part of the sliding plate lower surface and chassis top surface
Middle part is fixedly connected by balancing armed lever, and hook type bar, two institutes are fixedly connected at left and right sides of the sliding plate upper surface
The middle line that hook type bar is stated to slip plate vertical direction is symmetrical as symmetry axis, and the bottom of the hook type bar inner wall is fixedly connected with
Horizontal connection pad, the left and right sides of the hook type bar inner wall offer transverse groove, are provided with and connect on the right side of the hook type bar inner wall
The right side opening of pad, the hook type bar inner wall is equipped with transverse groove, and the internal activity of the transverse groove is socketed with dynamic connection device.
Optionally, the dynamic connection device includes interlock plate, and the bottom of the interlock plate through transverse groove and extends to cross
To the inside of slot, the bottom of the interlock plate is fixedly connected with the bottom of transverse groove inner wall by elastic flexible component, the company
Arc connection gasket is provided on the right side of movable plate, the bottom of the arc connection gasket is flexibly connected with the left side of horizontal connection pad.
Optionally, the front of the balance armed lever is fixedly connected with position control device, and the position control device includes curved pipe,
The internal activity of the curved pipe is socketed with T shape brace, and the bottom end of the T shape brace runs through curved pipe and extends to the right side of chassis
Side is fixedly connected on the right side of the left end of the T shape brace and chassis, and the internal activity of the curved pipe is socketed with arc elastic portion
Part is fixedly connected at the top of the top of the arc elastic component and arc inside pipe wall, the bottom end of the arc elastic component and T
It is fixedly connected at the top of shape brace, the outer surface movable sleeve of the curved pipe is connected to orientation arc sleeve, the orientation arc sleeve
It is fixedly connected at the top of left end and chassis.
Optionally, the connection pad has side to be fixedly connected with to connect plate, it is described connect be fixedly connected on the right side of plate it is slow
Flushing device, the front for connecting plate are fixedly connected with connecting line.
Optionally, the bottom of the connecting line is fixedly connected with balance armed lever, and the bottom end of the balance armed lever is along conducting wire
It to the top of chassis, is fixedly connected at the top of the bottom end of the balance armed lever and chassis, the back side of the conducting wire and balance armed lever
Front be fixedly connected by fixing sleeve.
Optionally, the buffer unit includes annular slab, and the internal activity of the annular slab is socketed with gag lever post, described
The left end of gag lever post is fixedly connected with connecting on the right side of plate, the left side of the annular slab and is connected and is passed through elastic shrinkage on the right side of plate
Component is fixedly connected, and the inner surface of the elastic shrinkage component is flexibly connected with the outer surface of gag lever post.
Optionally, the gag lever post right end runs through hook type bar and extends to the inside of transverse groove, the appearance of the gag lever post
Face is flexibly connected with the side of hook type bar, the internal activity connection of the gag lever post right end and transverse groove.
The present invention provides a kind of rolling stock pantograph device, have it is following the utility model has the advantages that
The rolling stock pantograph device passes through the company of pivot bush unit between the gag lever post and annular slab in buffer unit
Mode is connect to limit the vertical position of connection pad, then by elastic shrinkage component to the position of connection pad horizontal direction into
Row control, when rolling stock is during operating, in the state of being jolted immediately, ensure always energization cable always with its
Any side or two sides are contacted in left and right and bottom side, improve what energization cable was contacted with connection pad on pantograph device
Smooth degree, the limitation due to elastic shrinkage component to energization cable two sides connection pad and hook type bar reduce energization cable and lead
The frictional dissipation of connection pad or hook type bar improves the service life of pantograph device and cable.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention；
Fig. 2 is the scheme of installation of sliding plate；
Fig. 3 is the enlarged diagram of buffer unit；
Fig. 4 is the enlarged diagram in Fig. 2 at A.
In figure: 1, slipping plate；2, chassis；3, armed lever is balanced；4, conducting wire；5, hook type bar；6, transverse groove；7, connection pad；8,
Connecting line；9, connection device is moved；91, interlock plate；92, elastic flexible component；93, arc connection gasket；10, transverse groove；11, horizontal to connect
Pad；12, buffer unit；121, annular slab；122, gag lever post；123, elastic shrinkage component；13, plate is connected；14, position control device；
141, curved pipe；142, arc elastic component；143, T shape brace；15, arc sleeve is oriented.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Fig. 1-4, a kind of rolling stock pantograph device, including sliding plate 1 are please referred to, the bottom of sliding plate 1 is provided with
The middle part of chassis 2, sliding 1 lower surface of plate is fixedly connected with the middle part of 2 upper surface of chassis by balancing armed lever 3, slips table on plate 1
Hook type bar 5 is fixedly connected at left and right sides of face, two hook type bars 5 are to slip the middle line of 1 vertical direction of plate as symmetry axis phase
Mutually symmetrical, the bottom of 5 inner wall of hook type bar is fixedly connected with horizontal connection pad 11, and the left and right sides of 5 inner wall of hook type bar offers transverse direction
Slot 6 is provided with connection pad 7 on the right side of 5 inner wall of hook type bar, due to 123 pairs of energization cable two sides connection pads 7 of elastic shrinkage component
And the limitation of hook type bar 5, the frictional dissipation of energization cable and connection pad 7 or hook type bar 5 is reduced, pantograph device and cable are improved
Service life, the right side opening of 5 inner wall of hook type bar is equipped with transverse groove 10, and the internal activity of transverse groove 10 is socketed with dynamic connection device 9.
Wherein, moving connection device 9 includes interlock plate 91, and the bottom of interlock plate 91 through transverse groove 10 and extends to transverse groove
The bottom of 10 inside, interlock plate 91 is fixedly connected with the bottom of 10 inner wall of transverse groove by elastic flexible component 92, interlock plate
91 right side is provided with arc connection gasket 93, and the bottom of arc connection gasket 93 is flexibly connected with the left side of horizontal connection pad 11, and arc connects
It is flexible that connection pad 93 and connection pad 7 carry out left and right by elastic shrinkage component 123, arc connection gasket 93 and connection pad 7 and logical
Contact surface between electrical cables remains unchanged.
Wherein, the front for balancing armed lever 3 is fixedly connected with position control device 14, and position control device 14 includes curved pipe 141, arc
The internal activity of shape pipe 141 is socketed with T shape brace 143, and the bottom end of T shape brace 143 through curved pipe 141 and extends to chassis 2
Right side, the left end of T shape brace 143 is fixedly connected with the right side of chassis 2, and the internal activity of curved pipe 141 is socketed with arc bullet
Property component 142 is fixedly connected at the top of the top of arc elastic component 142 and 141 inner wall of curved pipe, arc elastic component 142
Bottom end be fixedly connected with the top of T shape brace 143, the outer surface movable sleeve of curved pipe 141 is connected to orientation arc sleeve 15, fixed
It is fixedly connected to the left end of arc sleeve 15 with the top of chassis 2.
Wherein, connection pad 7 has side to be fixedly connected with to connect plate 13, and the right side for connecting plate 13 is fixedly connected with buffer unit
12, the front for connecting plate 13 is fixedly connected with connecting line 8, and referring to Figure of description Fig. 3, the elasticity in buffer unit 12 is received at this time
Contracting component 123 is in non-telescope state, and connecting line 8 and gag lever post 122 are in horizontal equilibrium state, and connecting line 8 is in and limit
The length of position 12 equilibrium state of bar is 3/2nds of 12 length of gag lever post.
Wherein, the bottom of connecting line 8 is fixedly connected with balance armed lever 3, balances the bottom end of armed lever 3 along conducting wire 4 to chassis 2
Top, the bottom end of balance armed lever 3 is fixedly connected with the top of chassis 2, and the back side of conducting wire 4 and the front for balancing armed lever 3 pass through
Fixing sleeve is fixedly connected.
Wherein, buffer unit 12 includes annular slab 121, and the internal activity of annular slab 121 is socketed with gag lever post 122, limit
The left end of position bar 122 is fixedly connected with the right side for connecting plate 13, and the left side of annular slab 121 and the right side for connecting plate 13 pass through elasticity
Collapsible part 123 is fixedly connected, and the inner surface of elastic shrinkage component 123 is flexibly connected with the outer surface of gag lever post 122, by slow
The connection type of pivot bush unit carries out the vertical position of connection pad 7 between gag lever post 122 in flushing device 12 and annular slab 121
Limit, is then controlled by position of the elastic shrinkage component 123 to 7 horizontal direction of connection pad.
Wherein, 122 right end of gag lever post runs through hook type bar 5 and extends to the inside of transverse groove 6, the outer surface of gag lever post 122
It is flexibly connected with the side of hook type bar 5,122 right end of gag lever post is connect with the internal activity of transverse groove 6, when rolling stock is operating
During, in the state of being jolted immediately, ensure always energization cable always with side any in its left and right and bottom side or
Person two sides contact, and improve the smooth degree that energization cable is contacted with connection pad 7 on pantograph device.
Work step is operated first the top that the device is accurately mounted on corresponding rolling stock by personnel, then works
Personnel, which regulate and control conducting wire 4, then ensures that energization cable is located exactly at the inside of sliding 1 upper hooking type bar 5 of plate, passes through, passes through buffer unit
Pivot bush unit between gag lever post 122 in 12 and annular slab 121 limits the vertical position of connection pad 7, then passes through bullet
Property collapsible part 123 controls the position of 7 horizontal direction of connection pad, it is ensured that energization cable is always and in its left and right and bottom side
Any side or two sides are contacted, and when changeing to pantograph device, regulating and controlling and pressing conducting wire 4 makes to slip the hook on plate 1
There are five centimetres or more distances between type bar 5 is vertical with cable, then by turn on chassis 2 with connect consolidating between vehicle
Determine bolt, pantograph device can be replaced.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (7)
1. a kind of rolling stock pantograph device, including it is sliding plate (1), it is characterised in that: the bottom of the sliding plate (1) is set
It is equipped with chassis (2), the middle part of sliding plate (1) lower surface and the middle part of chassis (2) upper surface are fixed by balance armed lever (3)
It connects, is fixedly connected to hook type bar (5) at left and right sides of sliding plate (1) upper surface, two hook type bars (5) are with cunning
The middle line of fishplate bar (1) vertical direction is that symmetry axis is symmetrical, and the bottom of hook type bar (5) inner wall is fixedly connected with horizontal connection pad
(11), the left and right sides of hook type bar (5) inner wall offers transverse groove (6), the right side setting of hook type bar (5) inner wall
Have connection pad (7), the right side opening of hook type bar (5) inner wall is equipped with transverse groove (10), the internal activity of the transverse groove (10)
It is socketed with dynamic connection device (9).
2. a kind of rolling stock pantograph device according to claim 1, it is characterised in that: the dynamic connection device (9)
It include interlock plate (91), the bottom of the interlock plate (91) runs through transverse groove (10) and extends to the inside of transverse groove (10),
The bottom of the interlock plate (91) is fixedly connected with the bottom of transverse groove (10) inner wall by elastic flexible component (92), the company
It is provided on the right side of movable plate (91) arc connection gasket (93), the bottom of the arc connection gasket (93) and the left side of horizontal connection pad (11)
It is flexibly connected.
3. a kind of rolling stock pantograph device according to claim 1, it is characterised in that: the balance armed lever (3)
Front be fixedly connected with position control device (14), the position control device (14) includes curved pipe (141), the curved pipe
(141) internal activity is socketed with T shape brace (143), and the bottom end of the T shape brace (143) through curved pipe (141) and extends
To the right side of chassis (2), it is fixedly connected on the right side of the left end and chassis (2) of the T shape brace (143), the curved pipe (141)
Internal activity be socketed with arc elastic component (142), in the top of the arc elastic component (142) and curved pipe (141)
It is fixedly connected at the top of wall, is fixedly connected at the top of the bottom end of the arc elastic component (142) and T shape brace (143), it is described
The outer surface movable sleeve of curved pipe (141) is connected to orientation arc sleeve (15), the left end and chassis (2) of orientation arc sleeve (15)
Top be fixedly connected.
4. a kind of rolling stock pantograph device according to claim 1, it is characterised in that: the connection pad (7)
There is side to be fixedly connected with to connect plate (13), described connect is fixedly connected with buffer unit (12) on the right side of plate (13), described to connect
The front of plate (13) is fixedly connected with connecting line (8).
5. a kind of rolling stock pantograph device according to claim 4, it is characterised in that: the connecting line (8)
Bottom is fixedly connected with balance armed lever (3), top of the bottom end of balance armed lever (3) along conducting wire (4) to chassis (2), institute
It states and is fixedly connected at the top of the bottom end and chassis (2) of balance armed lever (3), the back side of the conducting wire (4) and balance armed lever (3) are just
Face is fixedly connected by fixing sleeve.
6. a kind of rolling stock pantograph device according to claim 4, it is characterised in that: the buffer unit (12)
It include annular slab (121), the internal activity of the annular slab (121) is socketed with gag lever post (122), the gag lever post (122)
Left end be fixedly connected on the right side of plate (13) with connecting, the left side of the annular slab (121) passes through on the right side of plate (13) with connecting
Elastic shrinkage component (123) is fixedly connected, the inner surface of the elastic shrinkage component (123) and the outer surface of gag lever post (122)
It is flexibly connected.
7. a kind of rolling stock pantograph device according to claim 6, it is characterised in that: the gag lever post (122)
Right end runs through hook type bar (5) and extends to the inside of transverse groove (6), outer surface and the hook type bar (5) of the gag lever post (122)
Side is flexibly connected, and gag lever post (122) right end is connect with the internal activity of transverse groove (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910763390.0A CN110450640B (en) | 2019-08-19 | 2019-08-19 | Pantograph device for railway vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910763390.0A CN110450640B (en) | 2019-08-19 | 2019-08-19 | Pantograph device for railway vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110450640A true CN110450640A (en) | 2019-11-15 |
| CN110450640B CN110450640B (en) | 2020-12-18 |
Family
ID=68487478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910763390.0A Active CN110450640B (en) | 2019-08-19 | 2019-08-19 | Pantograph device for railway vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110450640B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114407731A (en) * | 2022-01-06 | 2022-04-29 | 杭州申昊科技股份有限公司 | Subway assembled rigidity contact net linkage |
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|---|---|---|---|---|
| US5709292A (en) * | 1995-11-03 | 1998-01-20 | Deutsche Forschunganstalt Fur Luft-Und Raumfahrt E.V. | Current collector for transmitting energy between a contact wire and a motor coach |
| DE102010042027A1 (en) * | 2010-10-06 | 2012-04-12 | Hoffmann & Co. Elektrokohle Ag | Slip piece for a sliding contact device |
| CN104175909A (en) * | 2014-08-15 | 2014-12-03 | 王新国 | Traction network for electrified highway (street) |
| CN104507736A (en) * | 2012-04-25 | 2015-04-08 | 东日本旅客铁道株式会社 | Pantograph device |
| CN205468611U (en) * | 2016-03-04 | 2016-08-17 | 重庆恒通电动客车动力系统有限公司 | Give electronic bus of electric bow formula built on stilts charging system |
| CN107187321A (en) * | 2017-07-10 | 2017-09-22 | 姚胜朝 | Electric shock mechanical arm, the trolley pole containing the mechanical arm and the vehicle containing the trolley pole |
| CN108544926A (en) * | 2018-03-08 | 2018-09-18 | 大同新成新材料股份有限公司 | A kind of pantograph power connection mechanism |
| DE102017214927A1 (en) * | 2017-08-25 | 2019-02-28 | Siemens Mobility GmbH | Motor vehicle, pantograph and method for operating a motor vehicle |
-
2019
- 2019-08-19 CN CN201910763390.0A patent/CN110450640B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5709292A (en) * | 1995-11-03 | 1998-01-20 | Deutsche Forschunganstalt Fur Luft-Und Raumfahrt E.V. | Current collector for transmitting energy between a contact wire and a motor coach |
| DE102010042027A1 (en) * | 2010-10-06 | 2012-04-12 | Hoffmann & Co. Elektrokohle Ag | Slip piece for a sliding contact device |
| CN104507736A (en) * | 2012-04-25 | 2015-04-08 | 东日本旅客铁道株式会社 | Pantograph device |
| CN104175909A (en) * | 2014-08-15 | 2014-12-03 | 王新国 | Traction network for electrified highway (street) |
| CN205468611U (en) * | 2016-03-04 | 2016-08-17 | 重庆恒通电动客车动力系统有限公司 | Give electronic bus of electric bow formula built on stilts charging system |
| CN107187321A (en) * | 2017-07-10 | 2017-09-22 | 姚胜朝 | Electric shock mechanical arm, the trolley pole containing the mechanical arm and the vehicle containing the trolley pole |
| DE102017214927A1 (en) * | 2017-08-25 | 2019-02-28 | Siemens Mobility GmbH | Motor vehicle, pantograph and method for operating a motor vehicle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114407731A (en) * | 2022-01-06 | 2022-04-29 | 杭州申昊科技股份有限公司 | Subway assembled rigidity contact net linkage |
| CN114407731B (en) * | 2022-01-06 | 2023-06-09 | 杭州申昊科技股份有限公司 | Subway assembled rigid contact net suspension device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110450640B (en) | 2020-12-18 |
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Effective date of registration: 20201125 Address after: Room 276, 2 / F, Rixin international commercial center, 555 Qianjiang Road, Shangcheng District, Hangzhou City, Zhejiang Province Applicant after: Hangzhou HAILEI Technology Co.,Ltd. Address before: 310016 No. 25 Jiubao Industrial Park, Jianggan District, Hangzhou City, Zhejiang Province Applicant before: Gao Dequan |
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Application publication date: 20191115 Assignee: Hangzhou Kongfan Technology Co.,Ltd. Assignor: Hangzhou HAILEI Technology Co.,Ltd. Contract record no.: X2021330000380 Denomination of invention: A pantograph device for railway vehicles Granted publication date: 20201218 License type: Common License Record date: 20211011 |
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