CN219212983U - Auxiliary dismounting device for traction center pin of motor train unit - Google Patents
Auxiliary dismounting device for traction center pin of motor train unit Download PDFInfo
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- CN219212983U CN219212983U CN202223411019.4U CN202223411019U CN219212983U CN 219212983 U CN219212983 U CN 219212983U CN 202223411019 U CN202223411019 U CN 202223411019U CN 219212983 U CN219212983 U CN 219212983U
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Abstract
The application discloses supplementary dismouting device of EMUs traction center pin, this supplementary dismouting device of EMUs traction center pin includes: the device comprises a base, a vertical rotating frame, a lifting mechanism, a telescopic mechanism, a cross hinged support and a positioning tool; the vertical rotating frame is hinged on the base through a vertical rotating shaft, a sliding seat is arranged on the vertical rotating frame in a sliding manner, the lifting mechanism is arranged on the vertical rotating frame, the sliding seat is arranged at the output end of the lifting mechanism, the telescopic mechanism is arranged on the sliding seat, and the telescopic end of the telescopic mechanism can be telescopic along the horizontal direction; the cross hinged support comprises a first rotating shaft and a second rotating shaft, the axes of the first rotating shaft and the second rotating shaft are mutually perpendicular, the first rotating shaft is hinged with the telescopic end of the telescopic mechanism, and the second rotating shaft is hinged with the positioning tool; the positioning tool is used for installing the traction center pin. The traction center pin has the technical effects that the traction center pin has enough space to adjust the installation position, and the installation of the traction center pin is convenient.
Description
Technical Field
The application relates to the technical field of motor train unit maintenance equipment, in particular to an auxiliary dismounting device for a motor train unit traction center pin.
Background
When the motor train unit enters a maintenance warehouse to be maintained, the driving wheels or the bogie wheel sets are disassembled, and the whole motor train carriage is supported by the supporting vehicle at the traction pin position after the disassembly. Because the traction center pin is exactly the supporting position of the supporting vehicle, the residual space at the bottom is very small, the conventional lifting platform and the bracket tool are inconvenient to intervene in disassembling and assembling the traction center pin, and the supporting vehicle at the bottom is often required to be dislocated to have enough space to operate when the traction center pin is disassembled or installed.
Moreover, the existing fixture is more accurate in matching of the traction center pin of the motor train unit and the centering position of the carriage during assembly, and has no fine alignment adjusting function, so that the traction center pin has no enough space degree of freedom for adjustment during alignment and screw hole alignment, the operation is labor-consuming, and the disassembly and assembly efficiency is low.
Disclosure of Invention
The main aim of this application is to provide a supplementary dismouting device of EMUs traction center pin to solve the EMUs in traction center pin's installation, not enough space degree of freedom adjusts when counterpointing, to the screw, inconvenient very time consuming when center counterpoint and screw counterpoint appear, the operation is laborious, the lower problem of dismouting efficiency.
In order to achieve the above-mentioned purpose, the application provides a motor train unit traction center pin assists dismouting device, and this motor train unit traction center pin assists dismouting device includes: the device comprises a base, a vertical rotating frame, a lifting mechanism, a telescopic mechanism, a cross hinged support and a positioning tool; wherein,,
the vertical rotating frame is hinged to the base through a vertical rotating shaft, a sliding seat is arranged on the vertical rotating frame in a sliding manner, the lifting mechanism is arranged on the vertical rotating frame, the sliding seat is arranged at the output end of the lifting mechanism, the telescopic mechanism is arranged on the sliding seat, and the telescopic end of the telescopic mechanism can be telescopic along the horizontal direction;
the cross hinged support comprises a first rotating shaft and a second rotating shaft, the axes of the first rotating shaft and the second rotating shaft are perpendicular to each other, the first rotating shaft is hinged with the telescopic end of the telescopic mechanism, and the second rotating shaft is hinged with the positioning tool; the positioning tool is used for installing the traction center pin.
Further, the base comprises a base body, and a front support and a rear support which are arranged at two ends of the base body, wherein the front support is arranged to be two and horizontally extends, and the rear support is arranged to be two and horizontally extends.
Further, the ends of the front support and the rear support are provided with rollers.
Further, the length of the rear support is greater than that of the front support, and the rear support is hinged with the seat body, so that an included angle between the two rear supports is adjustable.
Further, the vertical rotating frame is of a frame structure, and the lower end of the vertical rotating frame is hinged with the seat body through a vertical rotating shaft;
the lifting mechanism is arranged in the middle of the vertical rotating frame.
Further, the vertical rotating frame is provided with a handle at one side close to the front support.
Further, the lifting mechanism is arranged into a hydraulic lifting group, the hydraulic lifting group comprises a fixed sleeve, a telescopic rod and a driving rod, and the driving rod is used for driving the telescopic rod to stretch in the fixed sleeve.
Further, the upper end of the telescopic rod is provided with a horizontal connecting rod, and two ends of the connecting rod are provided with pulleys;
the vertical rotating frame is provided with a cross beam, the cross beam is positioned below the pulley, a traction rope is fixedly arranged on the cross beam, and the traction rope bypasses the pulley and is connected with the sliding seat.
Further, the telescopic mechanism comprises a base and a telescopic arm which is arranged on the base in a sliding manner, a rack is fixedly arranged on the base, a driving wheel and a gear are arranged on the telescopic arm, the driving wheel is connected with the gear in a transmission manner, and the gear is meshed with the rack.
Further, the positioning tool comprises a clamp and a positioning assembly, wherein the clamp is in a C shape, two support arms of the clamp are provided with arc-shaped sliding grooves, and the circle centers of the arc-shaped sliding grooves are coincident with the central axis of the traction center pin;
the positioning components are arranged in two arc-shaped sliding grooves in a sliding manner, the two positioning components are connected through a positioning frame, the lower end of a traction pin center pin can penetrate through the positioning frame, and positioning bolts fixedly connected with the side faces of the traction center pin are arranged on the positioning components.
In the embodiment of the application, the base, the vertical rotating frame, the lifting mechanism, the telescopic mechanism, the cross hinged support and the positioning tool are arranged; the vertical rotating frame is hinged on the base through a vertical rotating shaft, a sliding seat is arranged on the vertical rotating frame in a sliding manner, the lifting mechanism is arranged on the vertical rotating frame, the sliding seat is arranged at the output end of the lifting mechanism, the telescopic mechanism is arranged on the sliding seat, and the telescopic end of the telescopic mechanism can be telescopic along the horizontal direction; the cross hinged support comprises a first rotating shaft and a second rotating shaft, the axes of the first rotating shaft and the second rotating shaft are mutually perpendicular, the first rotating shaft is hinged with the telescopic end of the telescopic mechanism, and the second rotating shaft is hinged with the positioning tool; the positioning tool is used for installing the traction center pin, achieves the purpose that the position of the traction center pin can be adjusted in multiple directions by matching the vertical rotating frame, the lifting mechanism, the telescopic mechanism and the cross hinged support after the traction center pin is installed on the positioning tool, and accordingly achieves the technical effects that the traction center pin has enough space to adjust the installation position, the installation of the traction center pin is convenient, and further solves the problems that a motor train unit has insufficient space freedom degree to adjust during the installation of the traction center pin, alignment and screw hole alignment are inconvenient and time-consuming, operation is laborious and the disassembly and assembly efficiency is low.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the application and to provide a further understanding of the application with regard to the other features, objects and advantages of the application. The drawings of the illustrative embodiments of the present application and their descriptions are for the purpose of illustrating the present application and are not to be construed as unduly limiting the present application. In the drawings:
FIG. 1 is a schematic illustration of an axially measured structure according to an embodiment of the present application;
FIG. 2 is a schematic top view of an embodiment of the present application;
FIG. 3 is a schematic illustration of an axially measured configuration for installing a traction center locating pin according to an embodiment of the present application;
the device comprises a base 1, a base 101, a base 102, a front support 103, a rear support 104, a roller 104, a vertical rotating frame 2, a cross beam 21, a telescopic mechanism 3, a telescopic arm 31, a rack 32, a sliding seat 33, a driving wheel 34, a gear 35, a lifting mechanism 4, a telescopic rod 41, a traction rope 42, a pulley 43, a connecting rod 44, a fixed sleeve 45, a driving rod 46, a cross hinge support 5, a second rotating shaft 51, a first rotating shaft 52, a positioning tool 6, a fixture 61, an arc chute 62, a positioning component 63, a positioning frame 64 and a positioning plate 65.
Detailed Description
In order to make the present application solution better understood by those skilled in the art, the following description will be made in detail and with reference to the accompanying drawings in the embodiments of the present application, it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the present application described herein.
In the present application, the terms "upper", "lower", "inner", and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings. These terms are used primarily to better describe the present application and its embodiments and are not intended to limit the indicated device, element or component to a particular orientation or to be constructed and operated in a particular orientation.
Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.
Furthermore, the terms "disposed," "configured," "connected," "secured," and the like are to be construed broadly. For example, "connected" may be in a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
In addition, the term "plurality" shall mean two as well as more than two.
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
The existing tool is more accurate in matching of the traction center pin of the motor train unit and the centering position of the carriage during assembly, and has no fine alignment adjusting function, so that the traction center pin has no enough space degree of freedom for adjustment during alignment and screw hole alignment, the operation is labor-consuming, and the disassembly and assembly efficiency is low.
For solving the above technical problem, as shown in fig. 1 to 3, the embodiment of the application provides an auxiliary dismounting device for a traction center pin of a motor train unit, and the auxiliary dismounting device for the traction center pin of the motor train unit includes: the device comprises a base 1, a vertical rotating frame 2, a lifting mechanism 4, a telescopic mechanism 3, a cross hinge support 5 and a positioning tool 6; wherein,,
the vertical rotating frame 2 is hinged to the base 1 through a vertical rotating shaft, a sliding seat 33 is arranged on the vertical rotating frame 2 in a sliding manner, the lifting mechanism 4 is arranged on the vertical rotating frame 2, the sliding seat 33 is arranged at the output end of the lifting mechanism 4, the telescopic mechanism 3 is arranged on the sliding seat 33, and the telescopic end of the telescopic mechanism 3 can be telescopic along the horizontal direction;
the cross hinged support 5 comprises a first rotating shaft 52 and a second rotating shaft 51, the axes of the first rotating shaft 52 and the second rotating shaft 51 are mutually perpendicular, the first rotating shaft 52 is hinged with the telescopic end of the telescopic mechanism 3, and the second rotating shaft 51 is hinged with the positioning tool 6; the positioning tool 6 is used for installing a traction center pin.
In this embodiment, the auxiliary dismounting device for the traction center pin mainly comprises a base 1, a vertical rotating frame 2, a lifting mechanism 4, a telescopic mechanism 3, a cross hinge seat 5 and a positioning tool 6. The base 1 can be used as a supporting foundation of the whole device, and the rollers 104 can be installed to facilitate the whole movement. The lower end of the vertical rotating frame 2 is hinged with the base 1 through a vertical rotating shaft, so that the vertical rotating frame 2 can rotate around the vertical shaft. The lifting mechanism 4 is installed on the vertical rotating frame 2 and connected with a sliding seat 33 on the vertical rotating frame 2, and the sliding seat 33 is driven by the lifting mechanism 4 to slide up and down on the vertical rotating frame 2. In order to facilitate the stable sliding of the sliding seat 33, the vertical rotating frame 2 may be provided with a sliding groove matched with the sliding seat 33. The telescopic mechanism 3 is mounted on the sliding seat 33, and can slide synchronously along with the sliding seat 33, and the telescopic mechanism 3 is horizontally arranged, so that the telescopic end of the telescopic mechanism can linearly stretch in the horizontal direction. In this application, the lifting mechanism 4 and the telescopic mechanism 3 are substantially linear displacement mechanisms, and the difference is that the lifting mechanism 4 is responsible for vertical lifting and the telescopic mechanism 3 is responsible for horizontal telescopic. A cross hinge support 5 is mounted at the telescopic end of the telescopic mechanism 3, and the cross hinge support 5 realizes rotation in two directions through a first rotating shaft 52 and a second rotating shaft 51 which are mutually perpendicular. For example, the first rotating shaft 52 is a vertical shaft, the second rotating shaft 51 is a horizontal shaft, and when the vertical shaft is connected with the telescopic mechanism 3, the horizontal shaft is connected with the positioning tool 6, the positioning tool 6 can rotate around the vertical direction by using the vertical shaft, and can also rotate around the horizontal direction by using the horizontal shaft. When the positioning tool 6 is provided with the traction center pin, the angle of the traction center pin can be adjusted in the direction.
The traction center pin auxiliary dismounting device in the embodiment can control the traction center pin to rotate by taking the vertical rotating shaft as the center through the vertical rotating frame 2, can adjust the height of the traction center pin through the lifting mechanism 4, can adjust the horizontal position of the traction center pin through the telescopic mechanism 3, can control the traction center pin to deflect in a first direction through the first rotating shaft 52, and can control the traction center pin to deflect in a second direction through the second rotating shaft 51. This application has realized the position adjustment of traction center pin on a plurality of directions and angle through the cooperation of base 1, vertical revolving rack 2, elevating system 4, telescopic machanism 3, cross free bearing 5 and location frock 6, can provide bigger installation space in the installation, is convenient for also adjust traction center pin to accurate mounted position in the installation simultaneously. The problem of motor train unit in traction center pin's installation, not enough space degree of freedom adjusts when counterpointing, counterpoint the screw, inconvenient very consuming time when appearance center counterpoint and screw counterpoint, the operation is laborious, dismouting efficiency is lower is solved.
In order to enable the base 1 to perform stable support and facilitate movement, as shown in fig. 1 to 3, the base 1 in this embodiment includes a base body 101, and front supports 102 and rear supports 103 provided at both ends of the base body 101, the front supports 102 being provided in two and extending horizontally, and the rear supports 103 being provided in two and extending horizontally. The ends of the front support 102 and the rear support 103 are each provided with a roller 104. An included angle may be maintained between the two front supports 102 to further improve stability. Since the telescopic mechanism 3 is telescopic toward the rear support 103 and the traction center pin having a large weight is also close to the rear support 103, the length of the rear support 103 in this embodiment needs to be set longer for balancing, and the length of the front support 102 can be reduced appropriately for reducing the space of the whole apparatus. In order to enable the rear support 103 to perform a stable supporting function, the rear support 103 is hinged to the base 101, so that an included angle between the two rear supports 103 is adjustable.
In order to facilitate the installation of the lifting mechanism 4, the vertical rotating frame 2 in the embodiment is provided with a frame structure, and the lower end of the vertical rotating frame is hinged with the base body 101 through a vertical rotating shaft; the lifting mechanism 4 is arranged in the middle of the vertical rotating frame 2.
To facilitate the movement of the whole device, the vertical turret 2 in this embodiment is provided with handles on the side close to the front support 102, and the handles may be provided in two and symmetrically distributed.
To facilitate manual control of the lifting height, the lifting mechanism 4 is configured as a hydraulic lifting group in this embodiment, the hydraulic lifting group includes a fixed sleeve 45 and a telescopic rod 41, and a driving rod 46, and the driving rod 46 is used to drive the telescopic rod 41 to extend and retract within the fixed sleeve 45. The hydraulic lifting group has the same structure as the manual control jack, and the height of the traction center pin is adjusted by reciprocally pressing the driving rod 46 to raise the height of the telescopic rod 41.
In order to increase the travel of the traction center pin in a limited height space, as shown in fig. 1 and 3, a horizontal connecting rod 44 is provided at the upper end of the telescopic rod 41 in the present embodiment, and pulleys 43 are provided at both ends of the connecting rod 44; the vertical rotating frame 2 is provided with a beam 21, the beam 21 is positioned below the pulley 43, the beam 21 is fixedly provided with a traction rope 42, and the traction rope 42 bypasses the pulley 43 and is connected with the sliding seat 33. This embodiment increases the travel of the traction center pin by the arrangement of the pulleys 43, facilitating a more free adjustment of the height of the traction center pin in a limited space.
In order to control the horizontal displacement of the traction center pin conveniently, the telescopic mechanism 3 in the embodiment comprises a base and a telescopic arm 31 slidably arranged on the base, a rack 32 is fixedly arranged on the base, a driving wheel 34 and a gear 35 are arranged on the telescopic arm 31, the driving wheel 34 is in transmission connection with the gear 35, and the gear 35 is meshed with the rack 32. The gear 35 is driven to rotate by rotating the driving wheel 34, so that the whole telescopic arm 31 is driven to linearly move on the base. In order to guide the movement of the telescopic arm 31, in this embodiment, two guide wheels are provided on the base, and the telescopic arm 31 is located between the two guide wheels.
The dismounting device in the embodiment can realize the position and angle adjustment of the traction center pin in a large range through the structure. However, since the center pin is required to be abutted with the carriage in the installation, and the screw holes arranged at the four corners are also aligned with the screw holes on the carriage, the center pin can be well abutted with the installation position of the carriage, but the alignment of the screw holes at the four corners is difficult. Thus the traction center pin also requires fine adjustment of position.
For this reason, as shown in fig. 1 and 3, the positioning tool 6 in this embodiment includes a fixture 61 and a positioning assembly 63, where the fixture 61 is set to be a "C" shape, two support arms of the fixture 61 are provided with an arc chute 62, and a center of the arc chute 62 coincides with a central axis of the traction center pin;
the two positioning components 63 are arranged in the two arc-shaped sliding grooves 62 in a sliding manner, the two positioning components 63 are connected through the positioning frame 64, the lower end of the traction pin center pin can penetrate through the positioning frame 64, and the positioning components 63 are provided with positioning bolts fixedly connected with the side face of the traction center pin.
Specifically, it should be noted that the traction center pin vertically passes through the positioning frame 64 and is pre-fixed with the positioning assembly 63. The positioning assembly 63 is composed of a positioning plate 65 and a positioning seat, the positioning seat is slidably connected with the arc chute 62 through two pin shafts, and the positioning plate 65 is fixedly connected with the positioning seat through bolts. The positioning plate 65 is fixedly connected with the two sides of the traction center pin through bolts. Because the heights of the screw holes for pre-positioning at two sides of different traction center pins are different, in this embodiment, an adjusting hole is further formed in the positioning plate 65 along the vertical direction, and the pre-positioning screw hole of the traction center pin is matched by adjusting the height position of the bolt in the adjusting hole.
Since the traction center pin needs to be installed at the head and tail of the car, the traction center pin can be installed on the positioning assembly 63 in the forward or reverse direction depending on the installation location. The positioning tool 6 and the positioning assembly 63 cooperate to adjust the positions of the four screw holes at the top of the traction center pin, so that the traction center pin needs to be enabled to rotate around the central axis of the traction center pin, and the positions of the four screw holes are changed. For this purpose, in this embodiment, the fixture 61 is provided with an arc chute 62, and the center of the arc chute 62 coincides with the central axis of the center of the traction pin. The traction center pin can rotate along the sliding groove by utilizing the positioning assembly 63, so that the positions of the four screw holes are adjusted to be aligned with the screw holes of the carriage.
The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations may be made by those skilled in the art. Any modifications, equivalent substitutions, improvements, or the like, which are within the spirit and principles of the present application, are intended to be included within the scope of the present application.
Claims (10)
1. Auxiliary dismounting device of motor train unit traction center pin, characterized by comprising: the device comprises a base, a vertical rotating frame, a lifting mechanism, a telescopic mechanism, a cross hinged support and a positioning tool; wherein,,
the vertical rotating frame is hinged to the base through a vertical rotating shaft, a sliding seat is arranged on the vertical rotating frame in a sliding manner, the lifting mechanism is arranged on the vertical rotating frame, the sliding seat is arranged at the output end of the lifting mechanism, the telescopic mechanism is arranged on the sliding seat, and the telescopic end of the telescopic mechanism can be telescopic along the horizontal direction;
the cross hinged support comprises a first rotating shaft and a second rotating shaft, the axes of the first rotating shaft and the second rotating shaft are perpendicular to each other, the first rotating shaft is hinged with the telescopic end of the telescopic mechanism, and the second rotating shaft is hinged with the positioning tool; the positioning tool is used for installing the traction center pin.
2. The motor train unit traction center pin auxiliary dismounting device as claimed in claim 1, wherein: the base comprises a base body, and a front support and a rear support which are arranged at two ends of the base body, wherein the front support is arranged to be two and horizontally extends, and the rear support is arranged to be two and horizontally extends.
3. The motor train unit traction center pin auxiliary dismounting device as claimed in claim 2, wherein: the ends of the front support and the rear support are provided with rollers.
4. The auxiliary dismounting device for a traction center pin of a motor train unit according to claim 3, wherein: the length of the rear support is greater than that of the front support, and the rear support is hinged with the seat body so that an included angle between the two rear supports is adjustable.
5. The motor train unit traction center pin auxiliary dismounting device as claimed in claim 2, wherein: the vertical rotating frame is of a frame structure, and the lower end of the vertical rotating frame is hinged with the seat body through a vertical rotating shaft;
the lifting mechanism is arranged in the middle of the vertical rotating frame.
6. The auxiliary dismounting device for the traction center pin of the motor train unit according to claim 5, wherein: the vertical rotating frame is provided with a handle at one side close to the front support.
7. The auxiliary dismounting device for the traction center pin of the motor train unit according to claim 5, wherein: the lifting mechanism is arranged into a hydraulic lifting group, the hydraulic lifting group comprises a fixed sleeve, a telescopic rod and a driving rod, and the driving rod is used for driving the telescopic rod to stretch in the fixed sleeve.
8. The motor train unit traction center pin auxiliary dismounting device as claimed in claim 7, wherein: the upper end of the telescopic rod is provided with a horizontal connecting rod, and two ends of the connecting rod are provided with pulleys;
the vertical rotating frame is provided with a cross beam, the cross beam is positioned below the pulley, a traction rope is fixedly arranged on the cross beam, and the traction rope bypasses the pulley and is connected with the sliding seat.
9. The motor train unit traction center pin auxiliary dismounting device as claimed in claim 8, wherein: the telescopic mechanism comprises a base and a telescopic arm arranged on the base in a sliding manner, a rack is fixedly arranged on the base, a driving wheel and a gear are arranged on the telescopic arm, the driving wheel is connected with the gear in a transmission manner, and the gear is meshed with the rack.
10. The motor train unit traction center pin auxiliary dismounting device as claimed in claim 9, wherein: the positioning tool comprises a clamp and a positioning assembly, wherein the clamp is in a C shape, two support arms of the clamp are provided with arc-shaped sliding grooves, and the circle centers of the arc-shaped sliding grooves are coincident with the central axis of the traction center pin;
the positioning components are arranged in two arc-shaped sliding grooves in a sliding manner, the two positioning components are connected through a positioning frame, the lower end of a traction pin center pin can penetrate through the positioning frame, and positioning bolts fixedly connected with the side faces of the traction center pin are arranged on the positioning components.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223411019.4U CN219212983U (en) | 2022-12-15 | 2022-12-15 | Auxiliary dismounting device for traction center pin of motor train unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223411019.4U CN219212983U (en) | 2022-12-15 | 2022-12-15 | Auxiliary dismounting device for traction center pin of motor train unit |
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| Publication Number | Publication Date |
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| CN219212983U true CN219212983U (en) | 2023-06-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223411019.4U Active CN219212983U (en) | 2022-12-15 | 2022-12-15 | Auxiliary dismounting device for traction center pin of motor train unit |
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| Country | Link |
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| CN (1) | CN219212983U (en) |
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- 2022-12-15 CN CN202223411019.4U patent/CN219212983U/en active Active
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