CN113799612A - Rigid contact net current collection device, pantograph and rail transit vehicle - Google Patents

Rigid contact net current collection device, pantograph and rail transit vehicle Download PDF

Info

Publication number
CN113799612A
CN113799612A CN202111214294.4A CN202111214294A CN113799612A CN 113799612 A CN113799612 A CN 113799612A CN 202111214294 A CN202111214294 A CN 202111214294A CN 113799612 A CN113799612 A CN 113799612A
Authority
CN
China
Prior art keywords
bracket
plate
sliding plate
carbon strip
pantograph
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.)
Granted
Application number
CN202111214294.4A
Other languages
Chinese (zh)
Other versions
CN113799612B (en
Inventor
许万涛
武丛
邓超月
王长青
谢立军
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CRRC Qingdao Sifang Co Ltd
Original Assignee
CRRC Qingdao Sifang Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by CRRC Qingdao Sifang Co Ltd filed Critical CRRC Qingdao Sifang Co Ltd
Priority to CN202111214294.4A priority Critical patent/CN113799612B/en
Publication of CN113799612A publication Critical patent/CN113799612A/en
Priority to PCT/CN2022/124067 priority patent/WO2023066043A1/en
Priority to ARP220102816A priority patent/AR127383A1/en
Priority to FR2210650A priority patent/FR3128166A1/en
Application granted granted Critical
Publication of CN113799612B publication Critical patent/CN113799612B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L5/00Current collectors for power supply lines of electrically-propelled vehicles
    • B60L5/18Current collectors for power supply lines of electrically-propelled vehicles using bow-type collectors in contact with trolley wire
    • B60L5/20Details of contact bow
    • B60L5/205Details of contact bow with carbon contact members
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L5/00Current collectors for power supply lines of electrically-propelled vehicles
    • B60L5/18Current collectors for power supply lines of electrically-propelled vehicles using bow-type collectors in contact with trolley wire
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L5/00Current collectors for power supply lines of electrically-propelled vehicles
    • B60L5/18Current collectors for power supply lines of electrically-propelled vehicles using bow-type collectors in contact with trolley wire
    • B60L5/22Supporting means for the contact bow
    • B60L5/28Devices for lifting and resetting the collector
    • B60L5/32Devices for lifting and resetting the collector using fluid pressure
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L2200/00Type of vehicles
    • B60L2200/26Rail vehicles

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Current-Collector Devices For Electrically Propelled Vehicles (AREA)

Abstract

The invention provides a rigid contact net current collecting device, a pantograph and a rail transit vehicle, which comprise a main sliding plate carbon strip, an auxiliary sliding plate, a spring, a bottom plate, a top plate and a bracket, wherein: the middle part of the bracket is provided with a concave part relative to the two ends, and a top plate, a bottom plate and a main sliding plate carbon strip are sequentially arranged in the concave part from bottom to top; the top plate is elastically connected with the middle part of the bracket through a plurality of springs; the convex parts at the two ends of the bracket are in sliding connection with the corresponding end parts of the main sliding plate carbon bars to be used as the current collection of the auxiliary sliding plate; and a metal gas pipeline of an automatic bow lowering system is arranged at the bottom of the carbon strip. The invention has good current collection performance along with the network, is particularly suitable for the operation of an overhead rigid contact network, and meets the current collection trend of the rigid contact network of the urban rail train.

Description

Rigid contact net current collection device, pantograph and rail transit vehicle
Technical Field
The invention belongs to the technical field of rigid contact net current collection, and particularly relates to a rigid contact net current collection device, a pantograph and a rail transit vehicle.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
With the rapid development of the rail vehicle industry, the current collection of an alternating-current rigid contact network is in a general trend, and the rail vehicle in the alternating-current urban area is different from the design modes of a flexible contact network + an alternating-current pantograph of a motor train unit and a rigid contact network + a direct-current pantograph of a subway, and most of the rail vehicles adopt a pantograph-network matching mode of a rigid-flexible mixed contact network + the alternating-current pantograph, so that the operation characteristics of the rail vehicle need to be considered; however, actual operation data of the existing urban line show that the bow net sparks under the existing contact net (particularly a new line) are serious, and the bow net vibrates severely.
Disclosure of Invention
The invention aims to solve the problems and provides a collector of a rigid contact net, a pantograph and a rail transit vehicle.
According to some embodiments, the invention adopts the following technical scheme:
the utility model provides a rigidity contact net current collection device, includes main slide carbon strip, supplementary slide, spring, bottom plate, roof and bracket, wherein:
the middle part of the bracket is provided with a concave part relative to the two ends, and a top plate, a bottom plate and a main sliding plate carbon strip are sequentially arranged in the concave part from bottom to top;
the top plate is elastically connected with the middle part of the bracket through a plurality of springs;
the convex parts at the two ends of the bracket are in sliding connection with the corresponding end parts of the main sliding plate carbon bars to be used as the current collection of the auxiliary sliding plate;
and a metal gas pipeline of an automatic bow lowering system is arranged at the bottom of the carbon strip.
As an alternative embodiment, the base plate is a metal base plate.
In an alternative embodiment, the bottom plate and the top plate are fixed by bolts.
As an alternative embodiment, the top plate, the spring and the bracket are integrally welded.
As an alternative embodiment, the carrier is a metal carrier.
As an alternative embodiment, the end side of the main sliding plate carbon strip is provided with a sliding block protruding outwards, the bottom of the sliding block is connected with the bottom plate, and the inner wall of the end of the bracket is provided with a sliding groove matched with the sliding block.
Through the mode of connection of spout and slider, the vertical skew of restriction main slide carbon strip.
In an alternative embodiment, an ADD air hose is led out from the middle position of the main sliding plate carbon strip, a through hole is formed in the corresponding position of the bracket, and the ADD air hose penetrates through the bracket downwards through the through hole.
As an alternative, the bottom of the bracket is airfoil-shaped. Has better streamline, small aerodynamic resistance and good current-receiving and net-following performance.
As an alternative embodiment, the main sliding plate carbon strip is made of a metal-impregnated material. The hardness is slightly lower than the contact wire hardness.
The pantograph angle of the pantograph is provided with the rigid contact net current collector.
In an alternative embodiment, the two ends of the bracket are fixedly connected with the bow corners through bolts.
A rail transit vehicle comprises the pantograph or the rigid contact net current collector.
Compared with the prior art, the invention has the beneficial effects that:
the novel rigid contact net current collecting device provided by the invention has the advantages that the conductive spring is utilized to ensure the mounting structure strength of the carbon strip, the vibration of the pantograph net is slowed down, the good conductive performance is realized, and the reliable drainage from the contact net is ensured.
According to the novel rigid contact net current collecting device provided by the invention, through the sliding connection between the main sliding plate carbon strip and the auxiliary sliding plate, the front and back deviation of the main sliding plate carbon strip caused by hard spots or foreign matters in the contact net is inhibited, the gap between the main sliding plate carbon strip and the auxiliary sliding plate is ensured to be far larger than the section outer diameter of the contact net wire, and the gap is reduced along with the pressure of the net wire, so that the reliable frictional contact of the contact net wire between the main sliding plate and the auxiliary sliding plate can be ensured, and the safe current collection is realized.
According to the novel rigid contact net current collecting device provided by the invention, the hardness of the main sliding plate carbon strip is slightly lower than that of the contact net wire, so that stable current collection between bow nets is realized on the basis of meeting the wear requirement of the bow nets.
The novel rigid overhead line system current collector provided by the invention is internally provided with an ADD metal gas pipeline and has an ADD automatic triggering and bow-reducing function.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
Fig. 1 is a front view of a current collector of a rigid catenary in accordance with at least one embodiment of the present disclosure;
fig. 2 is a top view of a current collector of a rigid catenary in accordance with at least one embodiment of the present disclosure;
fig. 3 is a side view of a current collection device for a rigid catenary in accordance with at least one embodiment of the present disclosure;
the device comprises a main sliding plate, a carbon strip, 2, a spring, 3, a sliding block, 4, a top plate, 5, a bottom plate, 6, an ADD metal air pipe, 7, a bolt, 8, a bracket, 9, a bow angle, 10, an ADD air pipe, 11 and an auxiliary sliding plate.
In the figure: the spacing or dimensions between each other are exaggerated to show the location of the various parts, and the illustration is for illustrative purposes only.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, unless the invention expressly state otherwise, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
for convenience of description, the words "up", "down", "left" and "right" in the present invention, if any, merely indicate correspondence with the directions of up, down, left and right of the drawings themselves, and do not limit the structure, but merely facilitate the description of the invention and simplify the description, rather than indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention.
In the present invention, the terms "mounting," "connecting," "fixing," and the like are used in a broad sense, and for example, the terms "mounting," "connecting," "fixing," and the like may be fixed, detachable, or integrated; the two components can be connected mechanically or electrically, directly or indirectly through an intermediate medium, or connected internally or in an interaction relationship, and the terms used in the present invention should be understood as having specific meanings to those skilled in the art.
As introduced in the background art, the defects of serious pantograph-catenary sparks and violent pantograph-catenary vibration exist in the prior art, and in order to solve the technical problems, the invention provides a rigid catenary current collector, a pantograph and a rail transit vehicle.
Example one
In a typical embodiment of the present invention, as shown in fig. 1, a rigid catenary current collector includes a main sliding plate carbon strip 1, an auxiliary sliding plate, a spring 2, a bracket 8, and the like, wherein a metal bottom plate 5 is disposed at the bottom of the main sliding plate carbon strip 1, and the metal bottom plate 5 and a top plate 4 are fixed by a bolt 7. A plurality of springs 2 are arranged between the top plate 4 and the bracket 8, one end of each spring 2 is abutted against the top plate 4, and the other end of each spring 2 is abutted against the bracket 8.
The two ends of the bracket 8 extend upwards and protrude to be connected with the end part of the main sliding plate carbon strip 1 in a sliding way to form an auxiliary sliding plate.
In this embodiment, the spring 2 is integrally welded to the top plate 4 and the bottom bracket 8, and is replaceable as a whole.
In the embodiment, the springs 2 are uniformly arranged along the extension direction of the bracket 8 at intervals, so that the stress is ensured to be even.
In this embodiment, the carbon slide (i.e. main slide carbon strip 1, hereinafter referred to as carbon strip) is made of a metal-impregnated material, and has good electrical and mechanical wear performance, simple structural design, light weight, small resistance, and good current-receiving performance along with the network, and is particularly suitable for the operation of an overhead rigid contact network, and meets the current-receiving trend of the rigid contact network of a rail train in a city area.
The bracket 8 is made of conductive metal, the parts of two ends of the bracket, which are close to the carbon strips, can be used as an auxiliary sliding plate 11 to receive current, and meanwhile, the bracket is fixedly connected with the bow corners 9 through bolts 7, and local parts are polished.
An ADD air pipe 10 is led out from the middle of the carbon strip, and a hole penetrating the bracket 8 downwards is connected to the side of the vehicle.
The whole body of the rigid contact net current collecting device provided by the embodiment adopts a streamline design, the contact height is gentle, and the current collecting resistance is small.
As shown in figure 2, the side surfaces of two ends of the carbon strip are provided with protruding parts, namely the sliding blocks 3, the sliding blocks 3 are embedded into sliding grooves arranged in the auxiliary sliding plate, a limiting structure in the vertical direction is formed, and the front and back deviation of the sliding plate caused by hard spots or foreign matters in a contact net can be inhibited.
In this embodiment, the sliding block 3 is made of metal and is connected to the bottom plate 5 at the bottom of the carbon strip.
The bottom of the bracket 8 adopts an airfoil design, so that the streamline is good, the aerodynamic resistance is small, and the current-receiving net-following performance is good.
As shown in figure 3, the carbon strip is close to the bottom, an ADD metal gas pipe 6 is arranged in the carbon strip, and the current collecting device has an ADD automatic triggering and bow lowering function.
Of course, in other embodiments, the materials, shapes and sizes of the components can be adjusted or changed according to specific conditions.
Example two:
a rigid contact net current collecting device of the first embodiment is arranged on a bow angle 9 of a pantograph, and two ends of a bracket 8 are fixedly connected with the bow angle 9 through bolts 7.
Example three:
a rail transit vehicle comprising the pantograph of the second embodiment or the rigid catenary current collector of the first embodiment.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a rigidity contact net current collection device which characterized by: including main slide carbon strip, supplementary slide, spring, bottom plate, roof and bracket, wherein:
the middle part of the bracket is provided with a concave part relative to the two ends, and a top plate, a bottom plate and a main sliding plate carbon strip are sequentially arranged in the concave part from bottom to top;
the top plate is elastically connected with the middle part of the bracket through a plurality of springs;
the convex parts at the two ends of the bracket are in sliding connection with the corresponding end parts of the main sliding plate carbon bars to be used as the current collection of the auxiliary sliding plate;
and a metal gas pipeline of an automatic bow lowering system is arranged at the bottom of the carbon strip.
2. The collector device of claim 1, wherein: the bottom plate is a metal bottom plate.
3. The collector device of claim 1, wherein: the bottom plate and the top plate are fixed through bolts.
4. The collector device of claim 1, wherein: the top plate, the spring and the bracket are integrally welded and connected.
5. The collector device of claim 1 or 4, wherein: the bracket is a metal bracket;
or the bottom of the bracket is in an airfoil shape.
6. The collector device of claim 1, wherein: the side face of the end part of the main sliding plate carbon strip is provided with a sliding block protruding outwards, the bottom of the sliding block is connected with the bottom plate, and the inner wall of the end part of the bracket is provided with a sliding groove matched with the sliding block;
or the main sliding plate carbon strip is made of a metal-impregnated material.
7. The collector device of claim 1, wherein: an ADD air hose is led out of the middle position of the main sliding plate carbon strip, a through hole is formed in the corresponding position of the bracket, and the ADD air hose penetrates through the bracket downwards through the through hole.
8. A pantograph, characterized by: the bow angle of the rigid catenary current collector is provided with the rigid catenary current collector disclosed in any one of claims 1 to 7.
9. The pantograph of claim 8, wherein: and the two ends of the bracket are fixedly connected with the bow corners through bolts.
10. A rail transit vehicle is characterized in that: a rigid catenary current collector comprising the pantograph of claim 8 or 9 or any one of claims 1-7.
CN202111214294.4A 2021-10-19 2021-10-19 Rigid contact net current collector, pantograph and rail transit vehicle Active CN113799612B (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN202111214294.4A CN113799612B (en) 2021-10-19 2021-10-19 Rigid contact net current collector, pantograph and rail transit vehicle
PCT/CN2022/124067 WO2023066043A1 (en) 2021-10-19 2022-10-09 Rigid catenary current collector, pantograph, and rail transit vehicle
ARP220102816A AR127383A1 (en) 2021-10-19 2022-10-17 RIGID CATENARY, PANTOGRAPH AND RAIL TRANSIT VEHICLE SENSOR DEVICE
FR2210650A FR3128166A1 (en) 2021-10-19 2022-10-17 RIGID CATENARY MANIFOLD DEVICE, PANTOGRAPH AND RAIL TRANSPORT VEHICLE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111214294.4A CN113799612B (en) 2021-10-19 2021-10-19 Rigid contact net current collector, pantograph and rail transit vehicle

Publications (2)

Publication Number Publication Date
CN113799612A true CN113799612A (en) 2021-12-17
CN113799612B CN113799612B (en) 2023-05-23

Family

ID=78897911

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111214294.4A Active CN113799612B (en) 2021-10-19 2021-10-19 Rigid contact net current collector, pantograph and rail transit vehicle

Country Status (4)

Country Link
CN (1) CN113799612B (en)
AR (1) AR127383A1 (en)
FR (1) FR3128166A1 (en)
WO (1) WO2023066043A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023066043A1 (en) * 2021-10-19 2023-04-27 中车青岛四方机车车辆股份有限公司 Rigid catenary current collector, pantograph, and rail transit vehicle

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012065492A (en) * 2010-09-17 2012-03-29 Railway Technical Research Institute Collector head for pantograph and pantograph including the same
CN208035964U (en) * 2018-04-02 2018-11-02 大同新成新材料股份有限公司 A kind of carbon slipper being easily installed
CN208359935U (en) * 2018-02-11 2019-01-11 北京海冬青机电设备有限公司 A kind of reinforced slide plate of pantograph
CN113291157A (en) * 2021-05-27 2021-08-24 中车株洲电力机车有限公司 Carbon slide and use its single carbon slide structure bow

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113799612B (en) * 2021-10-19 2023-05-23 中车青岛四方机车车辆股份有限公司 Rigid contact net current collector, pantograph and rail transit vehicle

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012065492A (en) * 2010-09-17 2012-03-29 Railway Technical Research Institute Collector head for pantograph and pantograph including the same
CN208359935U (en) * 2018-02-11 2019-01-11 北京海冬青机电设备有限公司 A kind of reinforced slide plate of pantograph
CN208035964U (en) * 2018-04-02 2018-11-02 大同新成新材料股份有限公司 A kind of carbon slipper being easily installed
CN113291157A (en) * 2021-05-27 2021-08-24 中车株洲电力机车有限公司 Carbon slide and use its single carbon slide structure bow

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023066043A1 (en) * 2021-10-19 2023-04-27 中车青岛四方机车车辆股份有限公司 Rigid catenary current collector, pantograph, and rail transit vehicle

Also Published As

Publication number Publication date
FR3128166A1 (en) 2023-04-21
WO2023066043A1 (en) 2023-04-27
AR127383A1 (en) 2024-01-17
CN113799612B (en) 2023-05-23

Similar Documents

Publication Publication Date Title
CN103057423B (en) Pantograph head structure capable of reducing offline rate of pantograph-contact line of electric locomotive
CN113799612A (en) Rigid contact net current collection device, pantograph and rail transit vehicle
CN201951276U (en) Elastic positioning wire clamp for busbar
CN201841973U (en) Assembling and mounting structure of DC 1500 V overhead contact line and return current rail
CN214295591U (en) Pantograph gasbag assembly fixture
CN205706237U (en) Tramcar contact line slidingtype spring suspension device
CN105730282A (en) Tramcar contact line sliding type elastic suspension device
CN113291157B (en) Carbon slide and use its single carbon slide structure bow
CN207466379U (en) The pantagraph current collector and its bow head of a kind of magnetic levitation vehicle
CN208324903U (en) A kind of Electric Transit bow collector
CN103290746A (en) Permanent-magnet-driven maglev track
CN217730221U (en) Pantograph slide plate with contact line polishing function
WO2019154166A1 (en) Blade contact charger, blade contact charger assembly, and rail transit system
CN211772460U (en) Medium-low speed magnetic levitation track panel joint
CN214564764U (en) Segmented insulator for rigid suspension system with speed of 200 kilometers per hour
CN217099738U (en) Elbow structure at end part of contact rail
CN113733921B (en) High-speed pantograph with single sliding plate
CN210047361U (en) Special section insulator for overhead rigid contact network
CN213905516U (en) Mounting structure power battery package with adjustable
CN2484215Y (en) Collector-gang positioning lead clip
CN214607179U (en) Magnetic levitation power supply rail protection device
CN215552670U (en) Four-rail protection system
CN217494078U (en) Special protection spanner for installing elastic strip of insulated corrosion-resistant track
CN212604732U (en) Left-right door opening structure of vehicle-mounted refrigerator
CN202413473U (en) Universal insulating support steel base for bottom current collection of DC750V contact rails

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant