Railway vehicle pushing device

Abstract

The invention relates to a rail vehicle pushing device, and belongs to rail transportation equipment. The vehicle body is located between two sets of steel rails of a track, the driving wheels are located on the two sides of the vehicle body and make contact with the inner side faces of the two sets of steel rails for friction driving, and the bearing wheels are located on the ground, making contact with the steel rails, of the lower portion of the vehicle body and support the vehicle body. The cart pushing plate is arranged in a top opening of the cart body in a swinging mode in the mode of being hinged to the cart body, the cart pushing plate swings between the horizontal state and the lifting inclined state, and when the cart pushing plate in the inclined state makes contact with the end of the cart body, the cart is moved in the inclined direction of the cart pushing plate. The cart plate is controlled in a gear-rack meshing mode, and bi-directional cart pushing can be achieved. The driving wheels are in contact with the tramcar track to transmit power so as to realize the car pushing operation, an auxiliary track does not need to be arranged, and the cost input is low.

Description

Technical Field

[0001] This invention relates to a rail vehicle trolley device, belonging to the field of rail transport equipment. Background Technology

[0002] Ground rail transport systems are an indispensable component of the overall transport system in coal mines and non-coal mines. They primarily handle the ground transport of coal, gangue, ore powder, miscellaneous materials, equipment, and other materials, with large transport volumes and frequent operation. Car trolleys are an important type of ground rail transport equipment, capable of propelling coal mine cars along connecting tracks at the mine entrance, bottom of the mine, main roadways, and mining area roadways, enabling the rapid transport of mine cars and coal or other materials.

[0003] Cart pushers offer advantages such as high carrying efficiency, large carrying capacity, and versatility in handling various types of goods, making them widely used in coal mine transportation both domestically and internationally. Traditional cart pushers mainly include chain pushers, wire rope pushers, and pin-tooth pushers, which suffer from high costs, difficult maintenance, significant limitations, reliance on manual labor, and low efficiency. Furthermore, with increasing demands for energy conservation, environmental protection, and automation, new types of cart pushers powered by lithium batteries have emerged.

[0004] However, existing mechanical structures are mostly developed from pin-type trolley pushers. The bidirectional trolley structure is realized by two trolleys, and the trolleys are rigidly connected by pins, making it difficult to achieve automatic connection and separation. This directly leads to the input of human resources and also affects the improvement of automation. In addition, its operation requires the additional installation of a toothed rail at the bottom of the middle of the mine car running track. Power is transmitted through the meshing of gears on the trolleys and the toothed rail, which results in high costs. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a rail vehicle trolley pushing device that solves the issues of high cost and frequent failures associated with traditional gear and rack pusher mechanisms.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: The present invention relates to a rail vehicle pushing device, comprising a car body, drive wheels, and support wheels. The car body is positioned between two sets of rails, the drive wheels are located on both sides of the car body and are driven by friction against the inner surfaces of the two sets of rails, and the support wheels are located at the bottom of the car body, contacting the ground between the rails and supporting the car body. The vehicle body is equipped with a trolley board and a trolley board lifting mechanism inside. The trolley panel is hinged to the vehicle body and oscillates within an opening at the top of the vehicle body. The trolley panel oscillates between a horizontal position and a tilted position. When the tilted trolley panel is inserted into the end of the vehicle body, the trolley moves in the direction of the tilt of the trolley panel. The trolley lifting structure includes a trolley push rod and a swinging part. The fixed end of the push rod is fixed to the vehicle body, and the moving end of the push rod is connected to the swinging part. The swinging part is hinged to the vehicle body via a pin, which is perpendicular to the front-to-back travel direction of the vehicle body. The moving end of the push rod extends out and pushes the swinging part to swing around the pin. The trolley plate is fixed to the swinging part. The device also includes a drive extension arm and a drive arm ejection mechanism. The drive extension arm is V-shaped with an obtuse angle. The middle apex of the drive extension arm is hinged to the vehicle body. The drive wheel is mounted outside the vehicle body. The surface of the drive wheel is a rubber wheel with a built-in hub motor. The drive extension arm is connected to the drive arm ejection mechanism inside the vehicle body. The drive arm ejection mechanism includes a drive push rod, a slide block, and a sliding block. The slide block has a guide groove, and the sliding block is located in the guide groove. The slider is rotatably mounted on the inner side of the drive arm inside the vehicle body and is located in the guide groove. The drive push rod is arranged along the length of the vehicle body and is connected to the slide block. The guide groove in the slide block is perpendicular to the drive push rod. When the drive push rod pushes the slide block to move along the moving direction of the vehicle body, the slider moves accordingly in the guide groove. The other end of the swing arm drives the drive wheel to change between two states: contacting and disengaging from the inner side of the rail.

[0007] According to the aforementioned rail vehicle trolley device, the trolley push rod is provided with a rack, the swing part is a fan-shaped plate with arc-shaped teeth on the arc edge that cooperate with the rack, and the trolley body is also provided with a push rod groove for guiding the trolley push rod.

[0008] According to the aforementioned rail vehicle pushing device, the pushing plate and the pushing plate lifting mechanism are two sets, which are arranged on the vehicle body in a front-to-back manner, namely the front pushing plate and the rear pushing plate. The pushing plate is placed in the opening on the upper side of the vehicle body. When the vehicle body moves, the pushing plate in the corresponding direction tilts and lifts to contact and push other mine cars.

[0009] According to the described rail vehicle pusher device, the two pusher plates tilt in opposite directions. The two sets of pusher plate lifting mechanisms share a set of pusher rods. The pusher rods are equipped with front and rear racks arranged in a front-to-back manner. The front and rear racks are spaced apart. When the front rack meshes with the front arc-shaped teeth on the front sector plate, the rear rack disengages from the front arc-shaped teeth on the rear sector plate. When the rear rack meshes with the front arc-shaped teeth on the rear sector plate, the front rack disengages from the front arc-shaped teeth on the front sector plate.

[0010] According to the aforementioned rail vehicle trolley device, the car body is a rectangular box shape, with axles for the load-bearing wheels arranged through the car body. Rectangular holes are opened on both sides of the car body for the drive wheels and drive extension arms to pass through. The front and rear ends of the car body are respectively provided with connecting mechanisms, which are connected to mine cars or other rail vehicles.

[0011] According to the aforementioned rail vehicle trolley device, the car body, at the rear end of the car body away from the connecting device, is also provided with an electrical connector. A storage battery is installed inside the car body. The trolley push rod and drive push rod are electric push rods. The storage battery provides power to the hub motors in the trolley push rod, drive push rod, and drive wheel. The electrical connector is connected to an external power source to charge the storage battery.

[0012] According to the aforementioned rail vehicle pushing device, a locking push rod is also provided. The locking push rod is located at both ends of the slide. The two locking push rods are pushed to extend to the front end of the car body. The connecting mechanism at the front end of the car body is a locking device sub-block, which has two sets of corresponding locking push rod positions. The connecting mechanism at the rear end of the car body is a locking device mother block, and the locking device sub-block and the locking device mother block are interlocked and connected.

[0013] According to the aforementioned rail vehicle pushing device, the locking device sub-blocks are arranged in pairs, including a swing fitting plate, a torsion spring, and a pin. The torsion spring is sleeved on the pin. The swing fitting plate and the car body respectively protrude from the ear plates with pin holes. The two ends of the pin are respectively set in the pin holes of the ear plates of the swing fitting plate and the car body. The torsion spring is sleeved on the pin. The straight rod part of the torsion spring abuts against the swing fitting plate and the car body. The straight rod parts at both ends of the torsion spring squeeze the swing fitting plate parallel to the front side of the car body and twist towards the middle of the front end of the car body. The push rod is connected to the half of the swing fitting plate facing the outside of the car body through a hinge shaft. The locking device mother block is T-shaped. The vertical part is fixed to the rear end of the car body. The two ends of the horizontal part are embedded in the inner half of the swing fitting plate of the locking device sub-block of the other rail vehicle pushing device to achieve the two being fitted and connected. When the push rod retracts into the car body, it pulls the swing fitting plate to swing and unlock the locking device mother block.

[0014] This invention relates to a rail vehicle pushing device that uses a gear-rack meshing method to control the pushing plates, enabling good bidirectional pushing capability. The two pushing plates can be interlocked and lowered simultaneously, allowing the device to push vehicles and move unobstructed under mine cars. Furthermore, this invention uses drive wheels that contact the mine car track to transmit power for pushing operations, eliminating the need for auxiliary tracks and resulting in lower costs.

[0015] Furthermore, the trolley device of the present invention has automatic connection and separation functions, reducing manual intervention and providing good support for the automation of trolley operations. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 2 This is a side structural view of the present invention. Figure 3 This is a partial enlarged view of the locking device sub-block of the present invention. Figure 4 This is a rear side view of the present invention. Figure 5 This is a top view of the structure of the present invention. Figure 6 This is a diagram of the internal trolley plate lifting structure of the present invention. Figure 7 This is a schematic diagram of the internal drive arm ejection mechanism of the present invention.

[0017] Figure label: 1. Car body, 2. Push plate, 21. Front push plate, 22. Rear push plate, 3. Locking device sub-block, 4. Locking device main block, 5. Battery, 6. Torsion spring, 7. Drive wheel, 8. Bearing wheel, 9. Electrical connector, 10. Swinging part, 11. Guide groove, 12. Guide wheel, 13. Slider, 14. Slide seat, 15. Locking push rod, 16. Rack, 17. Push rod, 18. Guide rail, 19. Drive extension arm, 20. Drive push rod. Detailed Implementation

[0018] The following is a further explanation of the content of this invention: This invention relates to a rail vehicle pushing device for pushing mine cars on ground tracks, specifically as follows: Figure 1 The device includes a car body 1, drive wheels 7, and support wheels 8. The car body 1 is positioned between two sets of rails. The drive wheels 7 are located on both sides of the car body 1, and their friction with the inner surfaces of the two sets of rails provides the driving force for the pusher, enabling the pusher to move. The drive wheels 7 contain built-in hub motors. The axles of the support wheels 8 pass through the car body 1, and the support wheels 8 are located on both sides of the car body 1, contacting the ground between the rails and supporting the car body 1. By driving the two sets of drive wheels to rotate on the inner surfaces of the rails, the car body moves between the rails.

[0019] The upper side of the car body 1 is provided with a pusher plate and a pusher plate lifting mechanism. The pusher plate lifting mechanism pushes the pusher plate to tilt on the upper surface of the car body. The pusher plate abuts against the rear of the mine car, and the car body pushes the mine car to move, so as to realize the purpose of the rail vehicle pusher device.

[0020] Specifically, such as Figure 1 As shown, the pusher plate is hinged to the car body 1 and swayed in the top opening of the car body 1. The pusher plate swings from horizontal to tilted. When the tilted pusher plate contacts the end of the mine car, the mine car moves in the tilting direction of the pusher plate.

[0021] like Figure 5As shown, the trolley lifting structure includes a trolley push rod 17 and a swing part 10. The fixed end of the push rod is fixed inside the vehicle body 1. The moving end of the trolley push rod 17 is connected to the swing part 10. The swing part 10 is hinged to the vehicle body 1 via a pin. The pin is perpendicular to the front and rear travel direction of the vehicle body 1 and is arranged horizontally. The moving end of the trolley push rod extends out to push the swing part 10 to swing around the pin. The trolley is fixed on the swing part 10.

[0022] Furthermore, a rack 16 is provided on the trolley push rod 17, and the swing part 10 is a fan-shaped plate with arc-shaped teeth on the arc edge that cooperate with the rack 16. The trolley body 1 is also provided with a push rod groove 11 for guiding the trolley push rod 17, which is used to guide the left and right linear movement of the rack 15.

[0023] Specifically, the end of the push rod 17 is provided with a guide wheel in the push rod groove 11 to achieve rolling friction and avoid possible jamming due to sliding friction.

[0024] Furthermore, the pusher plate and its lifting mechanism are in two sets, arranged in a front-to-back manner on the car body 1, namely the front pusher plate 21 and the rear pusher plate 22. The pusher plates are placed in openings on the upper side of the car body 1. When the car body 1 moves, the pusher plate in the corresponding direction tilts and lifts to contact and push other mine cars. The two pusher plates tilt in opposite directions. The two sets of pusher plate lifting mechanisms share a pusher rod 17. The pusher rod 17 is equipped with a front rack and a rear rack arranged in a front-to-back manner, with a distance between them. When the front rack meshes with the front arc-shaped teeth on the front sector plate, the rear rack disengages from the front arc-shaped teeth on the rear sector plate. When the rear rack 16 meshes with the front arc-shaped teeth on the rear sector plate, the front rack 16 disengages from the front arc-shaped teeth on the front sector plate. The two sets of arc-shaped gears do not mesh with the racks at the same time, controlling the front pusher plate and the rear pusher plate to rise and tilt at different times, so as to achieve the function of pushing the mine car body when moving in both directions.

[0025] If it is necessary to raise and tilt the front trolley, the extended end of the trolley push rod 17 retracts, the front rack and the front arc-shaped teeth begin to mesh, driving the swing part to rotate, and the front trolley is raised and tilted accordingly.

[0026] If it is necessary to raise and tilt the rear push plate, the extended end of the push rod 17 extends, the front rack drives the front arc tooth to rotate, which in turn drives the swing part of the front push plate to rotate, and the front push plate rotates from tilt to horizontal. The rear rack meshes with the rear arc tooth, which drives the swing part of the rear push plate to rotate, and the rear push plate tilts and rises accordingly.

[0027] If both trolley plates 2 need to fall, the trolley push rod 17 pushes the rack further towards the extended end. At this time, the front arc-shaped tooth separates from the front rack, the front trolley plate is horizontal, the rear rack moves to separate from the rear arc-shaped tooth, the swinging part lacks resistance, and the rear trolley plate falls to the horizontal.

[0028] Furthermore, a pair of parallel plates are provided on both sides of the trolley plate. The parallel plates are fixed to both sides of the swing part by bolts. The swing part consists of two arc-shaped plates with corresponding arc-shaped teeth that cooperate with two sets of corresponding racks. Similarly, there are also two sets of trolley push rods.

[0029] Furthermore, the trolley push rod 17 of this device is preferably a multi-stage electric push rod, used to drive the rack 16 to move left and right.

[0030] To achieve contact between the drive wheel and the inner side of the rail, a drive extension arm 19 and a drive arm extension mechanism are provided inside the vehicle body. The drive extension arm 19 is V-shaped with an obtuse angle. The middle apex of the drive extension arm 19 is hinged to the vehicle body 1. The drive wheel 7 is set outside the vehicle body 1 on the drive extension arm 19. The surface of the drive wheel 7 is a rubber wheel with a built-in hub motor. The drive extension arm 19 is connected to the drive arm extension mechanism inside the vehicle body 1.

[0031] Drive arm extension mechanism such as Figure 5 and Figure 6 As shown, the device includes a drive push rod 20, a slide block 14, and a sliding block. The slide block 14 is provided with a guide groove 18, and the sliding block is located in the guide groove 18. The slider 13 is rotatably mounted on the inner end of the vehicle body 1 of the drive arm and is located in the guide groove 18. The drive push rod 20 is arranged along the length direction of the vehicle body 1 and is connected to the slide block 14. The guide groove 18 in the slide block 14 is perpendicular to the drive push rod 20. When the drive push rod 20 pushes the slide block 14 to move along the moving direction of the vehicle body 1, the slider 13 moves accordingly in the guide groove 18. The other end of the swing arm drives the drive wheel 7 to change between two states: contacting and disengaging from the inner surface of the rail.

[0032] The car body 1 is a rectangular box-shaped structure made of welded steel plates, with a cover plate on top for easy installation and maintenance. Rectangular holes are opened on both sides of the car body 1 for the drive wheels 7 and drive extension arms to pass through. The front and rear ends of the car body 1 are respectively equipped with connecting mechanisms, which are connected to mine cars or other rail vehicles.

[0033] The vehicle body 1, at its rear end away from the connecting device, is also equipped with an electrical connector 9. A storage battery is installed inside the vehicle body 1. The trolley push rod 17 and drive push rod 20 are electric push rods. The storage battery provides power to the trolley push rod 17, drive push rod 20, and the hub motor in the drive wheel 7. The electrical connector 9 is connected to an external power source to charge the storage battery. The electrical connector 9 also serves as a channel connecting the storage battery, control system, and signal lines, and it meets the explosion-proof requirements for mining applications.

[0034] This device also includes locking push rods 15, which are located at both ends of the slide block 14. The two locking push rods 15 are pushed to the front end of the vehicle body 1. The connecting mechanism at the front end of the vehicle body 1 is a locking device sub-block, which has two sets of locking push rods 15 in corresponding positions. The connecting mechanism at the rear end of the vehicle body 1 is a locking device mother block, and the locking device sub-block and the locking device mother block are interlocked and connected.

[0035] The locking device sub-blocks are arranged in pairs, including a swing fitting plate, a torsion spring, and a pin. The torsion spring is sleeved on the pin. The swing fitting plate and the car body respectively protrude from the ear plates with pin holes. The two ends of the pin are respectively set in the pin holes of the ear plates of the swing fitting plate and the car body. The torsion spring is sleeved on the pin. The straight part of the torsion spring abuts against the swing fitting plate and the car body. The straight parts at both ends of the torsion spring squeeze the swing fitting plate parallel to the front side of the car body and twist it towards the middle of the front end of the car body. The push rod is connected to the half of the swing fitting plate facing the outside of the car body through a hinge. The locking device mother block is T-shaped. The vertical part is fixed to the rear end of the car body. The two ends of the horizontal part are embedded in the inner half of the swing fitting plate of the locking device sub-block of other rail vehicle pushers to achieve the two fitting and connection. When the push rod retracts into the car body, it pulls the swing fitting plate to swing and unlock the locking device mother block.

[0036] When the drive push rod is pushed out, it drives the slide block 14 to move towards the front end of the vehicle body, pushes the push rods at both ends to push out of the vehicle body, and pushes the swing fitting plate to swing towards the middle position of the vehicle body. The distance between the swing fitting plates between the two locking device sub-blocks is reduced, and the locking device mother block of the other pusher device is embedded between the two locking device sub-blocks. By pushing the two pusher devices with external force, the swing fitting plates of the two locking device sub-blocks are embedded on both sides of the T-shaped structure of the locking device mother block, so as to connect the locking device sub-blocks and the locking device mother block.

[0037] When it is necessary to unlock both vehicle bodies, the drive push rod of the rear vehicle body retracts, and the push rod is pulled. The outer side of the swing fitting plate is pulled, and the inner side swings outward from the vehicle body. The locking device mother block disengages from the two locking device daughter blocks, thereby unlocking and separating the locking device daughter blocks and the locking device mother block.

[0038] The drive wheel of this device is locked to the letter block using one set of drive push rods, while the vertical movement and descent of the trolley plate are controlled by another set of trolley push rods. Both the drive push rods and the trolley push rods utilize electric push rods or other electric linear actuators.

[0039] This invention relates to a rail vehicle pushing device that uses a gear-rack meshing method to control the pushing plates, enabling good bidirectional pushing capability. The two pushing plates can interlock and drop simultaneously, facilitating pushing and unobstructed movement under the mine car. Secondly, this invention uses drive wheels to transmit power through contact with the mine car track, eliminating the need for auxiliary tracks and reducing costs. Thirdly, the pushing device features automatic connection and disconnection functions, minimizing manual intervention and providing excellent support for automating pushing operations. Finally, this pushing device uses lithium batteries as its power source, combining environmental friendliness with ease of control.

Claims

1. A rail vehicle trolley device, comprising a car body (1), drive wheels (7) and load-bearing wheels (8), characterized in that, The vehicle body (1) is located between two sets of rails, the drive wheel (7) is located on both sides of the vehicle body (1), the drive wheel (7) is driven by friction against the inner side of the two sets of rails, and the bearing wheel (8) is located on both sides of the vehicle body (1), contacts the ground between the rails and supports the vehicle body (1). The upper side of the vehicle body (1) is provided with a push plate and a push plate lifting mechanism. The pusher plate is hinged to the car body (1) and swayed in the top opening of the car body (1). The pusher plate swings from horizontal to tilted. When the tilted pusher plate contacts the end of the mine car, the mine car moves in the tilting direction of the pusher plate. The trolley lifting structure includes a trolley push rod (17) and a swing part (10). The fixed end of the push rod is fixed inside the vehicle body (1). The moving end of the trolley push rod (17) is connected to the swing part (10). The swing part (10) is hinged to the vehicle body (1) via a pin. The pin is perpendicular to the front and rear travel direction of the vehicle body (1). The moving end of the trolley push rod extends out to push the swing part (10) to swing around the pin. The trolley plate is fixed on the swing part (10). The vehicle is also equipped with a drive extension arm (19) and a drive arm extension mechanism. The drive extension arm (19) is V-shaped with an obtuse angle. The middle apex of the drive extension arm (19) is hinged to the vehicle body (1). The drive extension arm (19) is equipped with a drive wheel (7) outside the vehicle body (1). The surface of the drive wheel (7) is a rubber wheel with a built-in hub motor. The drive extension arm (19) is connected to the drive arm extension mechanism inside the vehicle body (1). The drive arm extension mechanism includes a drive push rod (20), a slide (14), and a sliding block. The slide (14) is provided with a guide groove (18), and the sliding block is located in the guide groove (18). In the ), the slider (13) is rotatably set on the inner end of the vehicle body (1) of the drive arm. The slider (13) is in the guide groove (18). The drive push rod (20) is arranged along the length direction of the vehicle body (1). The drive push rod (20) is connected to the slide (14). The guide groove (18) in the slide (14) is perpendicular to the drive push rod (20). When the drive push rod (20) pushes the slide (14) to move along the moving direction of the vehicle body (1), the slider (13) moves in the guide groove (18). The other end of the swing arm drives the drive wheel (7) to change between two states: contacting and disengaging from the inner side of the rail.

2. The rail vehicle trolley pushing device according to claim 1, characterized in that, The push rod (17) of the cart is provided with a rack (16), the swing part (10) is a fan-shaped plate with arc-shaped teeth that cooperate with the rack (16) on the arc edge, and the cart body (1) is also provided with a push rod groove (11) for guiding the push rod (17).

3. The rail vehicle trolley pushing device according to claim 2, characterized in that, The pusher plate and the pusher plate lifting mechanism are two sets, which are set on the car body (1) in a front and rear manner, namely the front pusher plate (21) and the rear pusher plate (22). The pusher plate is placed in the opening on the upper side of the car body (1). When the car body (1) moves, the pusher plate in the corresponding direction tilts and lifts to contact and push other mine cars.

4. The rail vehicle trolley pushing device according to claim 3, characterized in that, When the two trolleys are tilted, they face opposite directions. The two sets of trolley lifting mechanisms share a set of trolley push rods (17). The trolley push rods (17) are equipped with front racks (16) and rear racks (16) arranged in a front-to-back manner. The front racks (16) and rear racks (16) are spaced apart. When the front racks (16) mesh with the front arc teeth on the front sector plate, the rear racks (16) disengage from the front arc teeth on the rear sector plate. When the rear racks (16) mesh with the front arc teeth on the rear sector plate, the front racks (16) disengage from the front arc teeth on the front sector plate.

5. The rail vehicle trolley pushing device according to claim 1, characterized in that, The car body (1) is a rectangular box shape. The axle of the load-bearing wheel (8) is arranged through the car body (1). Rectangular holes are opened on both sides of the car body (1) for the drive wheel (7) and the drive extension arm to pass through. The front end and rear end of the car body (1) are respectively provided with connecting mechanisms, which are connected to mine cars or other rail vehicles.

6. The rail vehicle pushing device according to claim 5, characterized in that, The vehicle body (1) is provided with an electrical connector (9) at the rear end of the vehicle body (1) away from the connecting device. A storage battery is installed inside the vehicle body (1). The push rod (17) and drive rod (20) are electric push rods. The storage battery provides power to the hub motor in the push rod (17), drive rod (20) and drive wheel (7). The electrical connector (9) is connected to an external power source to charge the storage battery.

7. The rail vehicle trolley device according to claim 6, characterized in that, The device is also provided with locking push rods (15), which are set at both ends of the slide (14). The two locking push rods (15) are pushed to the front end of the vehicle body (1). The connecting mechanism at the front end of the vehicle body (1) is a locking device sub-block, which has two sets of corresponding locking push rods (15). The connecting mechanism at the rear end of the vehicle body (1) is a locking device mother block, which is interlocked with the locking device sub-block and the locking device mother block.

8. The rail vehicle trolley device according to claim 7, characterized in that, The locking device sub-blocks are arranged in pairs, including a swing fitting plate, a torsion spring, and a pin. The torsion spring is sleeved on the pin. The swing fitting plate and the car body respectively protrude from the ear plate with pin holes. The two ends of the pin are respectively set in the pin holes of the ear plates of the swing fitting plate and the car body. The torsion spring is sleeved on the pin. The straight rod part of the torsion spring abuts against the swing fitting plate and the car body. The straight rod parts at both ends of the torsion spring squeeze the swing fitting plate parallel to the front side of the car body and twist it towards the middle of the front end of the car body. The push rod is connected to the half of the swing fitting plate facing the outside of the car body through a hinge shaft. The locking device mother block is T-shaped. The vertical part is fixed to the rear end of the car body. The two ends of the horizontal part are embedded in the inner half of the swing fitting plate of the locking device sub-block of other rail vehicle pushers to achieve the two fitting and connection. When the push rod retracts into the car body, it pulls the swing fitting plate to swing and unlock the locking device mother block.

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