CN114084176A - Adjustable mechanical locking device and opening and closing mechanism - Google Patents
Adjustable mechanical locking device and opening and closing mechanism Download PDFInfo
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- CN114084176A CN114084176A CN202111509156.9A CN202111509156A CN114084176A CN 114084176 A CN114084176 A CN 114084176A CN 202111509156 A CN202111509156 A CN 202111509156A CN 114084176 A CN114084176 A CN 114084176A
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- 238000005452 bending Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D17/00—Construction details of vehicle bodies
- B61D17/02—Construction details of vehicle bodies reducing air resistance by modifying contour ; Constructional features for fast vehicles sustaining sudden variations of atmospheric pressure, e.g. when crossing in tunnels
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T30/00—Transportation of goods or passengers via railways, e.g. energy recovery or reducing air resistance
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- Power-Operated Mechanisms For Wings (AREA)
Abstract
The invention discloses an adjustable mechanical locking device, which comprises an operating handle arranged on a vehicle body, a flexible shaft for transmitting the control action of the operating handle, a clutch connected with the flexible shaft, a base assembly connected with the clutch through a speed reducer, and a driving shaft connected with the base assembly and a driving cylinder. The invention utilizes the flexibility of the flexible shaft to realize the arbitrary arrangement of the mechanical locking operation platform on the motor train unit train body, and reduces the operation torque of the operation handle through the planetary reducer and the clutch, thereby avoiding the influence of the drive shaft on the rotation of the operation handle in a normal state. The mechanical locking device provided by the invention has the advantages that the market response speed of the product is improved, the standardization and the unification are realized on the basis that the whole mechanical scheme of the opening and closing mechanism does not need to be changed greatly, and the problems of low adaptability and low universality of the opening and closing structure in different types of motor train units caused by the fixation of the operation port of the mechanical locking device in the conventional opening and closing structure are solved.
Description
Technical Field
The present invention relates to the field of locking devices for opening and closing mechanisms, and more particularly, to an adjustable mechanical locking device and an opening and closing mechanism.
Background
The opening and closing mechanism is used as an important component of a head type of the motor train unit, and has the main functions of: the running wind resistance is reduced, and the energy consumption loss is reduced when the train runs at a high speed; rain water and foreign matters are prevented from entering the interior of the hood, and front-end equipment of the vehicle body is protected; when the train needs to be subjected to reconnection marshalling or traction rescue, the car coupler is exposed, the train is connected, in addition, the appearance integrity of the train can be improved, and the train is more attractive.
At present, the operation modes of the opening and closing mechanism of the motor train unit are divided into an automatic opening and closing mechanism and a manual opening and closing mechanism. The automatic opening and closing mechanism consists of a mechanical mechanism, an electric component and a pneumatic component and has remote control operation capability. The manual opening and closing mechanism generally does not include an electric component and a pneumatic component, and only has manual opening and closing capability. The automatic opening and closing mechanism and the manual opening and closing mechanism both have to have a mechanical locking function, for example, 201922183793.6 a pure electric opening and closing mechanism device and a mechanical opening and closing mechanism disclose electric structure locking, wherein the opening and closing mechanism consists of a cabin door, an opening and closing mechanism mechanical part, an electric device and a manual unlocking device; the electric device comprises an electric push rod and an electric cabinet, the manual unlocking device comprises a flexible shaft assembly, a flexible shaft mounting seat and an unlocking handle, the opening and the closing and the locking are controlled electrically, and the opening and the closing mechanisms are locked and unlocked at any position mainly through self-locking force of the electric push rod. In the mechanical structure locking, the locking mechanism is opened and closed through the air cylinder, and the locking or unlocking modes are various according to different mechanical locking structures, for example, a CN201920742863.4 opening and closing mechanism cabin door locking device is disclosed to comprise a cabin door, a rotating arm, a locking mechanism, an air cylinder, a deflector rod, an unlocking rod and a frame, wherein one end of the rotating arm is fixed with the cabin door, the other end of the rotating arm is connected with the frame through a rotating shaft and the air cylinder, the rotating arm is in limiting clamping with the locking device, the deflector rod is connected with the locking mechanism, the deflector rod is connected with the unlocking rod through a gear rack assembly, one end of the locking mechanism is connected with the air cylinder, and the air cylinder is installed on the frame. The locking mechanical structure is connected with the cylinder, can realize automatic locking and unlocking, can realize manual locking and unlocking by operating the unlocking rod, and has the functions of manual and automatic locking and unlocking. The standard settings of each type of motor train unit are inconsistent, the operation ports of the mechanical locking devices on the opening and closing mechanism carrier motor train unit body are fixed, the mechanical locking positions are set according to the overall requirements of the motor train unit body, the setting positions of each type of motor train unit are inconsistent, if the connection relation between the mechanical locking devices and the operation ports is adjusted through the transmission of a plurality of transmission mechanisms, the complexity of the structure is increased, fault nodes are increased, and the maintenance cost is increased. In order to meet the requirements of mechanical locking device operation ports at different positions, different opening and closing mechanisms need to be designed to meet different motor train unit requirements, meanwhile, the adaptability of each opening and closing structure to different types of motor train units is low, and the universality of each designed mechanical locking structure is low. Therefore, there is a need to design an adjustable mechanical locking device, which can greatly improve the market response speed of the product, and is standardized and unified on the basis that the whole mechanical scheme of the opening and closing mechanism does not need to be changed greatly.
Disclosure of Invention
The invention aims to solve the technical problem that the existing opening and closing structure is low in adaptability and universality of different types of motor train units due to the fact that an operation opening of a mechanical locking device is fixed, and provides an adjustable mechanical locking device.
The purpose of the invention is realized by the following technical scheme:
an adjustable mechanical locking device comprises an operating handle arranged on a vehicle body, a flexible shaft for transmitting the control action of the operating handle, a clutch connected with the flexible shaft, a base assembly connected with the clutch, and a driving shaft connected with the base assembly and a driving cylinder. The flexible shaft can be twisted and bent, so that the operation space is extended to a position convenient for operation, and the mechanical locking operation platform can be freely arranged on the train body of the motor train unit. And through the linkage of the control clutch of the flexible shaft, the base assembly and the driving shaft, the driving cylinder realizes the function of manually opening and closing the opening and closing mechanism.
Further, still be equipped with the reduction gear between clutch and the base subassembly, reduction gear one end is connected with the clutch through the adaptation cover, and the other end is connected with the base subassembly, through planetary reducer and clutch, avoided driving actuating cylinder can arouse operating handle's rotation through the linkage of structure when normal operating to can realize manual operation closing mechanism with a less moment. Preferably, the speed reducer comprises a planetary speed reducer.
Furthermore, the bending radius of the flexible shaft arrangement is not less than 200mm, and the mechanical locking operation platform can be set in any direction on the motor train unit train body.
Furthermore, the flexible shaft is connected with the input end of the clutch through the flexible shaft fixing sleeve, the input end of the clutch is connected with the speed reducer, and when the output rotating shaft of the clutch rotates, the input rotating shaft cannot rotate. Only the input rotating shaft rotates, the output rotating shaft can rotate, the change of the moment is realized, and the operating handle is protected.
Further, the base subassembly includes the mount pad and establishes the gear on the mount pad, the mount pad is installed on locking mechanism's skeleton, is equipped with the gear on the mount pad, and planetary reducer drives gear revolve, and the gear drives the drive shaft motion. The base assembly integrates installation, connection, fixation and transmission, and conversion from rotary motion to linear motion is realized.
Further, the drive shaft includes a rack that engages a gear in the base assembly and is moved by rotation of the gear.
Further, the drive shaft is in coaxial communication with the base assembly.
Further, the drive shaft passes through and is equipped with the bearing of self-lubricating effect on the through-hole of base subassembly, ensures the axiality transmission of drive shaft and base subassembly, increase of service life.
Further, the driving shaft is connected with a driving device of the air cylinder through a pin shaft.
When the automatic switching operation of switching mechanism, drive actuating cylinder and drive the drive shaft motion, through the connection structure of the gear and the rack of base subassembly and drive shaft, convert the linear motion of drive shaft rack into the rotary motion of base subassembly gear to through planetary reducer and clutch, in order to guarantee that operating handle does not rotate when normal operating.
When the opening and closing mechanism is manually operated, the flexible shaft is rotated through the operating handle, the clutch input rotating shaft is driven to move, the output rotating shaft inputs rated torque when the clutch input rotating shaft moves, the output rotating shaft of the clutch drives the gear to rotate, and the rotary motion of the gear in the base assembly is converted into the linear motion of the rack of the driving shaft through the connecting structure of the gear and the rack of the base assembly and the driving shaft, so that the cylinder is driven, and the manual opening mechanism is realized.
A motor train unit opening and closing mechanism comprises any one adjustable mechanical locking device.
Further specifically, the opening and closing mechanism of the motor train unit comprises a cabin door, a rotating arm, a locking device and a driving cylinder, wherein one end of the rotating arm is fixed with the cabin door, the other end of the rotating arm is connected with the frame through a rotating shaft, and the rotating arm driving cylinder is installed on the frame and connected with the rotating arm. One end of the locking mechanism is connected with a locking or unlocking device of the locking driving cylinder, the locking or unlocking device is connected with a driving shaft, the driving shaft is meshed with a gear in a base assembly fixed on a vehicle body framework, a planetary reducer is connected below the gear in the base assembly and connected with a clutch, the clutch is connected with a flexible shaft, and the other end of the flexible shaft is directly connected with an operating handle fixed on an operating opening of a mechanical locking device of the vehicle body through the flexible flexibility of the flexible shaft
Compared with the prior art, the beneficial effects are:
according to the invention, the flexible shaft operating position is arranged, so that the mechanical locking operating platform can be randomly arranged on the motor train unit train body, and the flexible shaft is linked with the planetary reducer and the clutch, so that when the opening and closing mechanism is not manually operated, the flexible shaft and the operating handle do not rotate along with the driving shaft, and the device can be fully protected; when the opening and closing mechanism is operated manually, the function of manually opening and closing the opening and closing mechanism is realized by rotating the flexible shaft handle. Meanwhile, the manual operation of the opening and closing mechanism can be realized by a small torque by combining the arrangement of the speed reducer. The mechanical locking device has small influence on the whole mechanical scheme of the opening and closing mechanism, can quickly respond to market demands, and reduces the difference of opening and closing structures caused by different positions of the operation ports of the mechanical locking device. The invention has simple and reasonable design, high adaptability of the device, reduced processing difficulty, reduced cost and convenient installation and maintenance.
Drawings
FIG. 1 is a diagram of a mechanical locking device;
FIG. 2 is a schematic view of the opening and closing mechanism device;
fig. 3 is a schematic view of the opening and closing mechanism device.
Wherein, 1 operating handle, 2 flexible axles, 3 flexible axle fixed sleeves, 4 clutches, 5 planetary reducer, 6 drive shafts, 7 base subassemblies.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the motion situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly. If there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
An adjustable mechanical locking device comprising:
the operating handle 1 is mounted on an operating opening of a mechanical locking device of the vehicle body.
The flexible shaft 2 has a bending radius not less than 200mm, one end of the flexible shaft is connected with the operating handle 1, the flexible shaft 2 is bent and extended, and the other end of the flexible shaft is connected with the clutch 4 through the flexible shaft fixing sleeve 3, so that the change of the moment is realized. The flexibility of the flexible shaft 2 in the bending arrangement of the head flow cover is utilized to transmit the operation control of the operating handle 1 to the cylinder driving device on the opening and closing mechanism.
Clutch 4, one end is that input pivot is connected with flexible axle 2, realizes the change of moment, and the other end is that output pivot is connected with base subassembly 7, and when output pivot rotated, input pivot must not rotate, and only input pivot rotates, and output pivot can rotate, better protection flexible axle 2 and operating handle 1.
And the base assembly 7 comprises a mounting seat and a gear arranged on the mounting seat. The mounting is fixed on a mounting framework beside the cylinder, and the gear is connected with the planetary reducer 5.
And the driving shaft 6 comprises a rack meshed with the gear, the rack penetrates through a through hole in the mounting seat and is transmitted with the coaxiality of the base assembly 7, a bearing is arranged on the through hole, one end of the driving shaft 6 is connected with a pin shaft, and the driving shaft is connected with a driving device of a driving cylinder through the pin shaft.
Example 2
As shown, an adjustable mechanical locking device, comprising:
the operating handle 1 is mounted on an operating opening of a mechanical locking device of the vehicle body.
The flexible shaft 2 has a bending radius not less than 200mm, one end of the flexible shaft is connected with the operating handle 1, the flexible shaft 2 is bent and extended, and the other end of the flexible shaft is connected with the clutch 4 through the flexible shaft fixing sleeve 3, so that the change of the moment is realized. The flexibility of the flexible shaft 2 in the bending arrangement of the head flow cover is utilized to transmit the operation control of the operating handle 1 to the cylinder driving device on the opening and closing mechanism.
One end of the clutch 4 is connected with the flexible shaft 2 for an input rotating shaft to realize the change of torque, the other end of the clutch is connected with the planetary reducer 5 for an output rotating shaft, when the output rotating shaft rotates, the input rotating shaft cannot rotate, only the input rotating shaft rotates, the output rotating shaft can rotate, and the flexible shaft 2 and the operating handle 1 are better protected.
And one end of the planetary reducer 5 is connected with the output end of the clutch 4 through a matching set, and the other end of the planetary reducer 5 is connected with a gear in the base assembly 7, so that the moment of the opening and closing structure driven by the mechanical locking structure is reduced.
And the base assembly 7 comprises a mounting seat and a gear arranged on the mounting seat. The mounting is fixed on a mounting framework beside the cylinder, and the gear is connected with the planetary reducer 5.
And the driving shaft 6 comprises a rack meshed with the gear, the rack passes through a through hole in the mounting seat and is transmitted with the coaxiality of the base assembly 7, and a bearing is arranged on the through hole. One end of the driving shaft 6 is connected with a pin shaft and is connected with a driving device of the driving cylinder through the pin shaft.
When the automatic switching operation of switching mechanism, direct control drives actuating cylinder switching, can drive 6 linear motion of drive shaft among the locking device during the cylinder drive, the motion of the rack in drive shaft 6 can drive base subassembly 7 rather than the gear of meshing, the gear of base subassembly 7 converts the linear motion of drive shaft 6 rack into the rotary motion of base subassembly 7 gear to through planetary reducer 5 and clutch 4, in order to guarantee that switching mechanism can not drive operating handle 1 rotation in automatic control's normal operating.
When the opening and closing mechanism is manually operated, the flexible shaft 2 is rotated through the operating handle 1, the flexible shaft 2 drives the input rotating shaft of the clutch 4 to move, the output rotating shaft of the clutch 4 inputs rated torque when the input rotating shaft of the clutch 4 moves, the output rotating shaft of the clutch 4 reduces torque of the clutch 4 driving the gear in the base assembly 7 to rotate through the planetary reducer 5, the rotary motion of the gear in the base assembly 7 is converted into linear motion of the rack of the driving shaft 6 through the connecting structure of the gear and the rack of the base assembly 7 and the driving shaft 6, therefore, the unlocking structure of the cylinder is driven, and the manual opening mechanism is realized.
Example 3
The present embodiment takes the type of opening and closing mechanism disclosed in 201920742863.4 as an example, and provides an opening and closing mechanism including any of the above-described adjustable mechanical locking devices. More particularly, the device comprises a cabin door, a rotating arm, a locking mechanism and a driving cylinder, wherein one end of the rotating arm is fixed with the cabin door, the other end of the rotating arm is connected with a frame through a rotating shaft, and the rotating arm driving cylinder is arranged on the frame and connected with the rotating arm. Locking device and the spacing block of rocking arm merge and be the symmetric distribution, locking mechanism includes guide holder, mortise lock board and guide bar, the guide holder drive actuating cylinder with the locking and be connected, the guide holder passes through the connecting rod and is connected with mortise lock board one end, the mortise lock board other end is equipped with the guide bar. The two rotating arms are respectively provided with a front locking rod and a rear locking rod, two sides of two ends of the latch plate are respectively provided with symmetrical grooves, and the locking rods can be clamped in the grooves. The driving shaft 6 is connected with a driving device of the cylinder, the driving shaft 6 is meshed with a gear in a base assembly 7 fixed on a vehicle body framework, a planetary reducer 5 is connected below the gear in the base assembly 7, the planetary reducer 5 is connected with a clutch 4, the clutch 4 is connected with a flexible shaft 2, and the other end of the flexible shaft 2 is directly connected with an operating handle 1 fixed on an operating opening of a mechanical locking device of the vehicle body through the flexible flexibility of the flexible shaft 2.
When the cabin door is automatically opened or closed, the adjustable mechanical locking device is not influenced when the locking driving cylinder drives the locking mechanism. When manual unlocking or locking is carried out, the operating handle 1 outside the vehicle body is rotated, the clutch 4 is driven by the flexible shaft 2 to input a rotating shaft to move, the output rotating shaft of the clutch 4 reduces the torque of the clutch 4 driving the gear in the base assembly 7 to rotate by the planetary reducer 5, the rotary motion of the gear in the base assembly 7 is converted into the linear motion of the rack of the driving shaft 6 by the connecting structure of the gear and the rack of the base assembly 7 and the driving shaft 6, the driving device of the air cylinder is driven to push, the locking rod of the rotating arm is driven to go out of the groove to unlock, and the cabin door is opened. If closed, the operating handle 1 is rotated reversely.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. An adjustable mechanical locking device is characterized by comprising an operating handle arranged on a vehicle body, a flexible shaft for transmitting the control action of the operating handle, a clutch connected with the flexible shaft, a base assembly connected with the clutch, and a driving shaft connected with the base assembly and a driving cylinder.
2. The adjustable mechanical locking device of claim 1 wherein a speed reducer is further disposed between the clutch and base assemblies.
3. The adjustable mechanical locking device of claim 1 wherein the flexible shaft arrangement has a bend radius of no less than 200 mm.
4. The adjustable mechanical locking device of claim 1 wherein the flexible shaft and the clutch are connected by a flexible shaft retaining sleeve.
5. The adjustable mechanical locking device of claim 1 wherein the base assembly comprises a mounting block and a gear disposed on the mounting block.
6. The adjustable mechanical locking device of claim 1 wherein the drive shaft includes a rack gear that engages a gear on the base assembly.
7. The adjustable mechanical locking device of claim 1 wherein the drive shaft is in coaxial communication with the base assembly.
8. The adjustable mechanical locking device of claim 1 wherein a bearing is disposed between the drive shaft and the base assembly.
9. The adjustable mechanical locking device of claim 1 wherein the drive shaft is connected to the cylinder drive by a pin.
10. A motor train unit opening and closing mechanism comprising the adjustable mechanical locking device as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111509156.9A CN114084176A (en) | 2021-12-10 | 2021-12-10 | Adjustable mechanical locking device and opening and closing mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111509156.9A CN114084176A (en) | 2021-12-10 | 2021-12-10 | Adjustable mechanical locking device and opening and closing mechanism |
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| Publication Number | Publication Date |
|---|---|
| CN114084176A true CN114084176A (en) | 2022-02-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111509156.9A Pending CN114084176A (en) | 2021-12-10 | 2021-12-10 | Adjustable mechanical locking device and opening and closing mechanism |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2328783Y (en) * | 1998-01-24 | 1999-07-14 | 毕仕吉 | Direct linked electric open and close machine for rolling curtain door |
| JP2008037386A (en) * | 2006-08-10 | 2008-02-21 | Kawasaki Heavy Ind Ltd | Cover opening/closing device of leading portion in high speed railway vehicle |
| JP2014118995A (en) * | 2012-12-14 | 2014-06-30 | Shin Nichinan:Kk | Valve opening and closing device and valve opening and closing method |
| CN206598847U (en) * | 2016-11-10 | 2017-10-31 | 青岛威奥轨道股份有限公司 | A kind of pure electric track vehicle front end switching mechanism |
| CN109969208A (en) * | 2017-12-28 | 2019-07-05 | 比亚迪股份有限公司 | Front end switching mechanism used for rail vehicle and the rail vehicle with it |
| CN211573016U (en) * | 2019-05-22 | 2020-09-25 | 株洲九方装备股份有限公司 | Cabin door locking device of opening and closing mechanism |
| CN211918654U (en) * | 2019-12-09 | 2020-11-13 | 株洲九方装备股份有限公司 | Pure electric opening and closing mechanism device |
| CN113060169A (en) * | 2020-01-02 | 2021-07-02 | 中车戚墅堰机车车辆工艺研究所有限公司 | Air guide sleeve opening and closing device and front nose assembly of railway vehicle |
-
2021
- 2021-12-10 CN CN202111509156.9A patent/CN114084176A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2328783Y (en) * | 1998-01-24 | 1999-07-14 | 毕仕吉 | Direct linked electric open and close machine for rolling curtain door |
| JP2008037386A (en) * | 2006-08-10 | 2008-02-21 | Kawasaki Heavy Ind Ltd | Cover opening/closing device of leading portion in high speed railway vehicle |
| JP2014118995A (en) * | 2012-12-14 | 2014-06-30 | Shin Nichinan:Kk | Valve opening and closing device and valve opening and closing method |
| CN206598847U (en) * | 2016-11-10 | 2017-10-31 | 青岛威奥轨道股份有限公司 | A kind of pure electric track vehicle front end switching mechanism |
| CN109969208A (en) * | 2017-12-28 | 2019-07-05 | 比亚迪股份有限公司 | Front end switching mechanism used for rail vehicle and the rail vehicle with it |
| CN211573016U (en) * | 2019-05-22 | 2020-09-25 | 株洲九方装备股份有限公司 | Cabin door locking device of opening and closing mechanism |
| CN211918654U (en) * | 2019-12-09 | 2020-11-13 | 株洲九方装备股份有限公司 | Pure electric opening and closing mechanism device |
| CN113060169A (en) * | 2020-01-02 | 2021-07-02 | 中车戚墅堰机车车辆工艺研究所有限公司 | Air guide sleeve opening and closing device and front nose assembly of railway vehicle |
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Application publication date: 20220225 |
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