Railway wagon door dismounting device

Abstract

The utility model relates to a railway freight car door dismounting equipment, and the equipment includes mobile platform, running system, dismounting folding arm device, car door electric clamp and control system. Running system includes two rudders and two universal support wheels of diagonal setting. Dismounting folding arm device includes stand, multistage folding arm and damping brake mechanism, and can lock folding arm posture at any angle. Car door electric clamp includes clamp frame, electric telescopic device and buckle, and through electric telescopic mechanism realizes the clamping and release of car door. Mobile platform still is equipped with special rack for stacking the dismounted car door. Dismounting method includes moving the equipment to the vicinity of car door, operating folding arm device and clamp to complete the clamping of car door, and releases or connects, moves and releases etc. The utility model improves operation safety, reduces the labor intensity of workers, reduces personnel demand, integrates dismounting and stacking function, and has higher reliability and adaptability.

Description

Technical Field

[0001] This utility model relates to the field of railway vehicle maintenance equipment technology, and in particular to an auxiliary device for disassembling and installing railway freight car doors. Background Technology

[0002] With the continuous growth of railway freight volume in my country, the tasks of inspection and maintenance of railway freight cars are becoming increasingly heavy. During the inspection and maintenance of freight car bodies, it is often necessary to disassemble and replace doors that cannot be repaired due to damage, deformation, or other reasons.

[0003] Currently, the disassembly and assembly of freight car doors on domestic railways still largely relies on traditional manual methods. On-site operations typically utilize a beam-adjusting machine (a simple lifting device) in the workshop or a self-made simple steel bar lifting device, along with wire ropes for hoisting and movement. This method of operation has many problems:

[0004] 1. High safety risks: Truck doors are usually quite heavy (as mentioned in the handover document, the clamp load must be ≥150kg). When manually disassembling and assembling them with simple lifting tools, the doors are prone to shaking or even falling due to improper operation, lifting tool failure, or wire rope breakage, posing a serious threat to the personal safety of the workers. Especially for deformed doors, their center of gravity may shift, making them more prone to instability during disassembly.

[0005] 2. High labor intensity: During the disassembly and assembly process, manual operations such as supporting, positioning, prying, and knocking on the pins are required. Especially when aligning and installing a new door, the door's posture needs to be precisely controlled, which is very labor-intensive.

[0006] 3. High demand for personnel: Due to safety and operational complexity requirements, the traditional method of disassembling and assembling a single car door usually requires 3 to 4 workers to work together, resulting in high labor costs. Moreover, given the current shortage of personnel in the railway system, it is difficult to guarantee a sufficient number of workers.

[0007] 4. Low work efficiency: The manual process with simple tools is cumbersome and difficult to coordinate. The disassembly and assembly of a single door takes a long time. Generally, it takes about 13 seconds to manually knock off a door, and subsequent transportation and installation take even longer, affecting the overall maintenance progress.

[0008] 5. Lack of specialization: Most existing tools are general-purpose or temporary self-made, lacking optimized design for the characteristics of truck doors, making them inconvenient to operate and difficult to adapt to different types or degrees of deformation of truck doors.

[0009] Although some intelligent and automated auxiliary equipment for railway vehicle maintenance already exists both domestically and internationally, such as auxiliary equipment for disassembling and assembling components like doors and windows in locomotive and passenger car maintenance, these devices are primarily designed for the structural characteristics of locomotives and passenger cars and may not be entirely suitable for freight car doors, which differ in structure, size, weight, and operating environment. Specialized, lightweight, and reliable disassembly and assembly equipment specifically designed for freight car doors, capable of effectively addressing the aforementioned safety, efficiency, and labor intensity issues, still needs to be developed.

[0010] Therefore, how to provide a safe, efficient, labor-saving, and easy-to-operate special disassembly and assembly equipment and method for railway freight car doors to improve existing working conditions, reduce safety risks, and increase maintenance efficiency has become an urgent technical problem to be solved in this field. Utility Model Content

[0011] The purpose of this utility model is to overcome the shortcomings of existing technology in the disassembly and assembly of railway freight car doors, such as low safety, high labor intensity, high personnel requirements, and low efficiency, and to provide a railway freight car door disassembly and assembly equipment with reasonable structure, safe and convenient operation, and the ability to significantly reduce labor intensity and improve work efficiency.

[0012] To achieve the above objectives, this utility model provides a railway freight car door disassembly and assembly device, comprising:

[0013] A mobile platform is used to carry the various components of the trolley and move them within the work area;

[0014] The traveling system, installed on the mobile platform, is used to drive the movement of the mobile platform;

[0015] The folding arm device is installed on the mobile platform and is used to suspend and move the electric door clamp.

[0016] Electric door clamps are installed at the end of the disassembly and assembly folding arm device and are used to clamp the doors of railway freight cars;

[0017] A control system is used to control the movement of the traveling system, the lifting and lowering of the folding arm device, and the clamping and releasing of the electric door clamp.

[0018] In some optional embodiments of this utility model, the walking system includes:

[0019] Two steering wheels, diagonally positioned at the bottom of the mobile platform, serve as drive wheels;

[0020] Two omnidirectional support wheels are diagonally positioned at the bottom of the mobile platform.

[0021] By employing a steering wheel system, the mobile platform can achieve flexible omnidirectional movement and precise positioning within narrow working spaces, greatly improving the ease of operation and adaptability of the equipment.

[0022] Preferably, the traveling system further includes:

[0023] An operating handle is used to control the direction and speed of the traveling system;

[0024] A storage battery is used to provide electrical power to the running system.

[0025] In some optional embodiments of this utility model, the detachable and folding arm device includes:

[0026] The uprights are installed on the mobile platform;

[0027] The multi-segment articulated arm, connected to the column, has joints that can rotate in the horizontal plane and is equipped with a damping braking mechanism for locking the posture of the articulated arm at any angle.

[0028] Preferably, the folding arm disassembly and assembly device further includes: a lifting mechanism for suspending the electric door clamp; the lifting mechanism is mounted on the folding arm.

[0029] More preferably, the lifting mechanism includes an electric winch fixed to a column; the electric winch suspends the electric door clamp via a wire rope sling. The wire rope connection has a certain degree of flexibility, allowing the door clamp to adjust its posture within a small range for easy alignment.

[0030] Preferably, the folding boom is a two-section folding boom structure, including a first boom section hinged to the column and a second boom section hinged to the first boom section; the lifting mechanism is mounted on or near the end of the second boom section. This folding boom structure has a large operating coverage area and flexibility, and can easily extend into the vehicle door position for removal operations.

[0031] Preferably, the damping braking mechanism is located at the rotating joint of the boom assembly / disassembly device, locking or releasing the boom's rotational movement by changing the magnitude of the friction force. This design ensures that the boom reliably remains in its current position after stopping, preventing easy displacement even when bearing the weight of a door or experiencing unexpected disturbances, thus guaranteeing operational stability and safety and avoiding dangers or positioning difficulties caused by unexpected boom movement.

[0032] More preferably, the damping braking mechanism includes friction plates and a micro-drive device for adjusting the pressure between the friction plates. The damping force is adjusted and locked by changing the pressure through the micro-drive device. This method can achieve precise and reliable locking and unlocking control.

[0033] In some optional embodiments of this utility model, the mobile platform is also equipped with a special rack for stacking disassembled truck doors. Placing the disassembled doors directly on the rack provided with the equipment integrates disassembly and temporary storage, reduces secondary handling of the doors, improves operational efficiency, and makes on-site management more standardized.

[0034] Preferably, the dedicated rack has a multi-layer stacking structure and is equipped with a mechanical linkage mechanism. When one layer of doors is placed in place, the mechanical linkage mechanism causes the support plate for supporting the upper layer of doors to automatically adjust its posture, facilitating the placement of the next layer of doors. This ingenious design utilizes the lever principle, making multi-layer stacking operations more convenient and faster, and optimizing storage space.

[0035] In some optional embodiments of this utility model, the electric door clamp includes: a clamp frame for connecting a lifting device; an electric telescopic device disposed on the clamp frame; at least one pair of latches connected to the electric telescopic device, capable of moving to both sides under the drive of the electric telescopic device, for engaging the door slot; and a control button disposed on the clamp frame for controlling the operation of the electric telescopic device. The electric telescopic device includes: a slider, with the latches fixed to the slider; a screw threadedly connected to the slider; a clamping portion on the screw; a motor driving the screw to rotate; and a screw fixing block cooperating with the clamping portion to limit the axial displacement of the screw. The rotational motion of the screw is converted into linear motion of the slider, which in turn drives the latches to clamp the door. By driving the screw to rotate through the motor, the rotational motion of the screw is converted into linear motion of the slider, which in turn drives the latches to move to both sides, thereby clamping or releasing the door. The screw fixing block can absorb the impact transmitted by the latches when clamping or releasing the door, protecting the motor from impact, thereby improving the lifespan and reliability of the electric telescopic device.

[0036] Preferably, the screw is connected to the motor output via a transmission mechanism. This transmission mechanism further reduces the impact transmitted to the motor, thereby enhancing the device's impact resistance.

[0037] More preferably, the transmission mechanism includes a reducer connected to the output end of the motor, and a coupling connected between the reducer and the screw. The reducer can reduce the motor speed and increase the torque, and the coupling can compensate for the alignment error between the screw and the reducer, and further buffer impacts.

[0038] Preferably, the clamp frame is provided with a sliding clamp block arranged along the direction of the buckle's movement, and the slider is provided with a groove for accommodating the sliding clamp block. The cooperation between the groove and the sliding clamp block ensures that the buckle moves in a straight line. The cooperation between the groove and the sliding clamp block ensures that the slider and the buckle it drives move accurately in a straight line, preventing deviation or jamming during movement.

[0039] Preferably, each latch is independently driven by one of the aforementioned electric telescopic devices. This design allows for flexible adjustment of the latch position and clamping force according to the specific structure of the door, making it suitable for a wider variety of door types.

[0040] Preferably, the clamp frame is provided with a lifting ring for connecting the lifting device. The lifting ring facilitates quick and convenient connection of the electric clamp to the wire rope or hook of the lifting equipment.

[0041] Preferably, the clamp frame is also provided with a handle; the control button is located on the handle; one end of the handle is fixedly connected to the clamp frame, and the other end abuts against the outer wall of the door after the door is clamped. In this way, it is not only convenient for the operator to control the clamping and releasing of the clamp with one hand, but also provides additional support or positioning reference.

[0042] The railway freight car door disassembly and assembly equipment and method provided by this utility model have the following beneficial effects:

[0043] 1. Improved operational safety: The combined action of the electric clamp and the folding arm device ensures that the door remains under control during disassembly, avoiding the risk of personal injury that may be caused by the door falling off.

[0044] 2. Reduced labor intensity for workers: The equipment assists in supporting the weight of the car door, so workers no longer need to rely on physical strength to support the door, which significantly reduces labor intensity and worker fatigue.

[0045] 3. Reduced personnel requirements: The equipment is designed so that disassembly can be done by a single person and installation only requires two people, which greatly reduces personnel requirements compared to the traditional method that requires 3-4 people.

[0046] 4. Integrated disassembly and palletizing functions: The dedicated material rack on the equipment can directly store the disassembled doors, avoiding secondary handling and improving work efficiency.

[0047] 5. High reliability: The damping braking mechanism ensures that the folding arm can be locked in any position to prevent the door from moving unexpectedly; the electric clamp adopts an electric telescopic mechanism to achieve reliable clamping and ensure stable and safe operation.

[0048] 6. High adaptability: The equipment can handle doors in various states, including severely deformed doors, expanding its application range; at the same time, its compact design allows it to operate flexibly in limited spaces.

[0049] In summary, this utility model effectively solves the problems of safety risks, high labor intensity, and large personnel requirements in the disassembly and assembly process of railway freight car doors in the prior art, and provides a safe, efficient, and labor-saving solution for disassembling and assembling railway freight car doors. Attached Figure Description

[0050] To more clearly illustrate the technical solutions of the disclosed embodiments of this utility model, the accompanying drawings of the embodiments will be briefly described below. These drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model.

[0051] Figure 1 This is a three-dimensional structural diagram of the railway freight car door disassembly and assembly equipment provided in this embodiment of the utility model. Figure 1 ;

[0052] Figure 2 This is a three-dimensional structural diagram of the railway freight car door disassembly and assembly equipment provided in this embodiment of the utility model. Figure 2 ;

[0053] Figure 3 This is a three-dimensional schematic structure of the mobile platform provided in this embodiment of the utility model. Figure 1 ;

[0054] Figure 4 This is a three-dimensional schematic structure of the mobile platform provided in this embodiment of the utility model. Figure 2 Part of the structure is hidden within it;

[0055] Figure 5 This is a three-dimensional structural diagram of the disassembly and assembly folding arm device according to an embodiment of this utility model;

[0056] Figure 6 This is a three-dimensional structural diagram of the electric door clamp according to an embodiment of the present utility model;

[0057] Figure 7 This is a front view schematic diagram of the electric door clamp according to an embodiment of the present utility model. The clamp frame is not shown in the figure.

[0058] Figure 8 This is an exploded view of the electric telescopic device for the electric clamp on the car door according to an embodiment of this utility model;

[0059] Figure 9 This is a flowchart of the disassembly and assembly method provided in this embodiment of the utility model;

[0060] Figure 10This is a partial cross-sectional schematic diagram of the micro drive device in the folding arm disassembly and assembly device provided in an embodiment of the present invention. Detailed Implementation

[0061] The technical solution (including preferred technical solution) of this utility model will be further described in detail below with reference to the accompanying drawings and by listing some optional embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0062] Implementation 1

[0063] like Figure 1 and Figure 2 As shown in the figure, this embodiment provides a railway freight car door disassembly and assembly device, including: a mobile platform 1, a traveling system 2, a disassembly and assembly folding arm device 3, an electric door clamp 4, and a control system 5. This device is mainly used to assist in the disassembly and assembly of railway freight car doors, ensuring operational safety, effectively reducing the labor intensity of operators, and improving work efficiency.

[0064] Mobile platform 1 is used to carry the various components of the equipment and move them within the work area. For example... Figure 3 and Figure 4 As shown, the dimensions of the mobile platform 1 are designed to be no more than 1800mm in length and no more than 1200mm in width, with the height determined according to the overall stability requirements. The platform 1 is equipped with components such as a toolbox 12 and a baffle plate 13. The platform 1 has sufficient load-bearing capacity to support a load of no less than 1.5 tons.

[0065] The traveling system 2 is mounted on the mobile platform 1 and is used to drive the movement of the mobile platform 1. The traveling system 2 includes: two steering wheels 21, diagonally positioned at the bottom of the mobile platform 1 as drive wheels; and two omnidirectional support wheels 22, diagonally positioned at the bottom of the mobile platform 1 to support the platform. The steering wheels 21 have a diameter of 250mm and are made of solid polyurethane coated to ensure the platform can smoothly traverse the rails. The traveling system 2 also includes: an operating handle 23 for controlling the direction and speed of travel; and a battery 24 for providing power to the traveling system 2. The battery 24 is a 48V lithium battery with a capacity of 100AH, capable of supporting continuous operation for 4 hours under full load conditions.

[0066] The travel system 2 has three control modes: push mode, lateral movement mode, and follow mode. Push and lateral movement modes are controlled via the operating handle 23. Follow mode utilizes UMB sensing technology; by wearing a follow wristband tag, the dual-steering wheel platform actively follows the tag. The system receives signals from the wristband tag via PDOA, acquires distance and angle data, and then uses a PLC algorithm to control the steering wheels to steer and travel. The travel speed can be set from 0 to 5 km / h, and the minimum turning radius is 1800 mm.

[0067] The folding arm device 3 is mounted on the moving platform 1 and is used to suspend and move the electric door clamp 4. Figure 5 As shown, the folding arm assembly / disassembly device 3 includes: a column 31, fixed on the mobile platform 1; a two-section folding arm 32, connected to the column 31, having a joint that can rotate in the horizontal plane and covering the working area; and a damping braking mechanism 33, used to lock the folding arm's posture at any angle.

[0068] A damping braking mechanism 33 is located at the rotating joint of the boom assembly / disassembly device 3. It locks or releases the boom's rotational movement by changing the magnitude of friction. Specifically, the damping braking mechanism 33 includes friction plates 331 and a miniature drive device for adjusting the pressure between the friction plates 331. By controlling the extension length of the miniature lifting motor, the pressure of the friction plates 331 is changed, achieving the purpose of locking the boom in any state and preventing weightlessness and displacement during lifting operations due to inclines or tilts.

[0069] In some embodiments of the present invention, such as Figure 10 As shown, in this embodiment, the micro-drive device includes a micro-drive mounting base 332 suspended on the folding arm 32, a friction head 333 mounted on the micro-drive mounting base 332, and an adjusting nut 334 mounted on the micro-drive mounting base 332. The adjusting nut 334 is threadedly connected to the micro-drive mounting base 332 and is located below the friction head 333. By adjusting the feed amount of the adjusting nut 334, the pressure between the friction head 333 and the friction plate 331 is adjusted, thereby adjusting the damping between the folding arm 32. Preferably, an elastic element 335, typically a disc spring, is shown between the adjusting nut 334 and the friction head 333.

[0070] The folding arm assembly 3 also includes a lifting mechanism 34 for suspending the electric door clamp 4. The lifting mechanism 34 includes an electric winch 341 fixed to the column 31. The electric winch 341 has a power of 0.75kW and controls the length of the wire rope 342 by winching, thereby adjusting the height of the electric door clamp 4. The wire rope 342 connection has a certain degree of flexibility, allowing the door clamp 4 to adjust its posture within a small range for easy alignment.

[0071] The electric door clamp 4 is located at the end of the disassembly and assembly folding arm device 3 and is used to clamp the door of a railway freight car. For example... Figures 6 to 8 As shown, the electric door clamp 4 includes: a clamp frame 41 for connecting a lifting device; an electric telescopic device 42 disposed on the clamp frame 41; a buckle 43 connected to the electric telescopic device 42 and capable of moving to both sides under the drive of the electric telescopic device 42 to clamp the door slot; and a control button 44 disposed on the clamp frame 41 for controlling the operation of the electric telescopic device 42.

[0072] The electric telescopic device 42 includes: a slider 421, with a buckle 43 fixed to the slider 421; a screw 422 threadedly connected to the slider 421; a motor 423 driving the screw 422 to rotate; and a screw fixing block 424 cooperating with a clamping part 427 on the screw 422 to limit the axial displacement of the screw 422. By driving the screw 422 to rotate via the motor 423, the rotational motion of the screw 422 is converted into linear motion of the slider 421. The slider 421 then drives the buckle 43 to move to both sides, thus locking or releasing the door.

[0073] To improve the durability and reliability of the electric telescopic device 42, the screw 422 is connected to the output end of the motor 423 via a transmission mechanism. The transmission mechanism includes a reducer 425 connected to the output end of the motor 423 and a coupling connecting the reducer and the screw 422. The reducer reduces the speed of the motor 423 and increases the torque, while the coupling compensates for alignment errors between the screw 422 and the reducer, and further buffers impacts.

[0074] The clamp frame 41 is provided with a sliding clamping block 428 arranged along the movement direction of the buckle 43. The slider 421 is provided with a groove 429 for accommodating the sliding clamping block. The cooperation between the groove 429 and the sliding clamping block 428 ensures that the buckle 43 moves in a straight line. In addition, the clamp frame 41 is provided with a lifting ring 45 for connecting a lifting device, which facilitates the quick connection of the electric clamp 4 to the wire rope 342 or the hook.

[0075] The clamp frame 41 is also equipped with a handle 46; the control button 44 is located on the handle 46; one end of the handle 46 is fixedly connected to the clamp frame 41, and the other end abuts against the outer wall of the door after the door is clamped. This design not only makes it easy for the operator to control the clamping and releasing of the clamp with one hand, but also provides additional support or positioning reference.

[0076] The mobile platform 1 is also equipped with a dedicated rack 6 for stacking disassembled truck doors. The rack 6 measures 1430mm × 1320mm × 790mm and uses a modular structure, allowing for the stacking of six doors per rack. The rack 6 is constructed from high-strength steel and features a multi-layer stacking structure with a mechanical linkage mechanism. Once one layer of doors is in place, the mechanical linkage mechanism automatically adjusts the support plate supporting the previous layer's doors, facilitating the placement of the next layer. Specifically, through leverage, each layer placed flattens the support plate of the previous layer until all six doors are stacked. The rack 6 can be designed with reference to Chinese Patent "A Roof Trolley for Multiple Vehicle Models," Publication No. CN218085803U.

[0077] The control system 5 is used to control the movement of the traveling system 2, the lifting and lowering of the folding arm device 3, and the clamping and releasing of the electric door clamp 4. The control system 5 uses a PLC controller to ensure system stability and reliability. The control system 5 has complete self-locking and interlocking protection functions, and has overload protection, power failure protection, and other functions, and will issue alarm signals when the load is exceeded or the power is insufficient.

[0078] Example 2

[0079] This embodiment provides a method for disassembling and assembling railway freight car doors, using the railway freight car door disassembly and assembly equipment described in Embodiment 1. Figure 9 As shown, the disassembly and assembly method includes the following steps:

[0080] Step S1: Move the disassembly and assembly equipment to the vicinity of the door of the railway freight car to be operated, about 550mm away from the door;

[0081] Step S2: Operate the disassembly and assembly folding arm device 3 and the lifting mechanism 34 to move the electric door clamp 4 to the railway freight car door;

[0082] Step S3: Activate the clamping function of the electric door clamp 4 to clamp and fix the railway freight car door;

[0083] Step S4: Adjust the lifting mechanism 34 so that the door clamp 4 bears part or all of the weight of the truck door;

[0084] Step S5: Perform the disengagement or connection operation between the door and the carriage;

[0085] During disassembly: manually use tools to knock the pins out and then pry open the bottom latch;

[0086] During installation: Place the upper part of the door against the lug in the cargo box, adjust the hole position to align and insert the pin, and then fasten the buckle;

[0087] Step S6: Operate the disassembly and assembly folding arm device 3 to move the clamped truck door away from or closer to the truck bed;

[0088] Step S7: If necessary, activate the release function of the door clamp 4 to release the truck door.

[0089] The disassembly process also includes the following steps:

[0090] Step S8: After performing the disengagement operation between the door and the cargo box, the clamped truck door is moved to the special material rack 6 on the mobile platform 1 via the disassembly and folding arm device 3.

[0091] Step S9: Place the truck door on the special material rack 6;

[0092] Step S10: Activate the release function of the door clamp 4 to release the truck door;

[0093] Step S11: After all 6 doors have been disassembled, use a forklift to transport the dedicated rack 6 filled with doors to the designated location and replace it with a new empty rack.

[0094] Example 3

[0095] This embodiment is a further improvement on embodiment 1, mainly optimizing the control of the walking system 2.

[0096] In this embodiment, the following mode of the walking system 2 employs more advanced sensing technology. The system uses a fusion of laser navigation sensors and infrared distance sensors to improve following accuracy and stability. The laser navigation sensor is used to accurately locate the position of the tag worn by the operator, while the infrared distance sensor is used for close-range collision avoidance protection.

[0097] In addition, the walking system 2 incorporates an automatic obstacle avoidance function. During operation, if an obstacle is detected, the system automatically slows down and, if necessary, comes to a complete stop until the obstacle is removed or the operator intervenes manually. This function is achieved through the combined use of ultrasonic and visual sensors, significantly improving the equipment's safety in complex environments.

[0098] The travel system 2 also features a new positioning memory function. Operators can store specific work positions in the system via the control panel, and when needed, they can recall the function with a single click, allowing the equipment to automatically move to the preset position, further improving work efficiency.

[0099] In terms of power management, this embodiment employs an intelligent power management system that dynamically adjusts the motor power output based on the current load and operating status, maximizing battery life while ensuring performance. Simultaneously, the system automatically adjusts the maximum speed and acceleration based on the battery status, ensuring safe completion of tasks even with low battery levels.

[0100] Those skilled in the art will readily understand that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, combinations, substitutions, improvements, etc., made under the spirit and principles of the present utility model are included within the protection scope of the present utility model.

Claims

1. A railway freight car door disassembly and assembly device, characterized in that, include: A mobile platform is used to carry the various components of the trolley and move them within the work area; The traveling system, installed on the mobile platform, is used to drive the movement of the mobile platform; The folding arm device is installed on the mobile platform and is used to suspend and move the electric door clamp. Electric door clamps are installed at the end of the disassembly and assembly folding arm device and are used to clamp the doors of railway freight cars; A control system is used to control the movement of the traveling system, the lifting and lowering of the folding arm device, and the clamping and releasing of the electric door clamp.

2. The railway freight car door disassembly and assembly equipment according to claim 1, characterized in that, The traveling system includes: Two steering wheels, diagonally positioned at the bottom of the mobile platform, serve as drive wheels; Two omnidirectional support wheels are diagonally positioned at the bottom of the mobile platform; An operating handle is used to control the direction and speed of the traveling system; A storage battery is used to provide electrical power to the running system.

3. The railway freight car door disassembly and assembly equipment according to claim 1, characterized in that, The folding arm disassembly and assembly device includes: The uprights are installed on the mobile platform; The multi-segment folding arm is connected to the column, has joints that can rotate in the horizontal plane, and is equipped with a damping braking mechanism for locking the posture of the folding arm at any angle. The lifting mechanism, mounted on the folding arm, is used to suspend the electric door clamp.

4. The railway freight car door disassembly and assembly equipment according to claim 3, characterized in that: The lifting mechanism includes an electric winch fixed to a column; the electric winch suspends the electric door clamp via a wire rope sling.

5. The railway freight car door disassembly and assembly equipment according to claim 3, characterized in that... The articulated boom is a two-section articulated boom structure, including a first boom section hinged to the column and a second boom section hinged to the first boom section; the lifting mechanism is installed on or near the end of the second boom section.

6. The railway freight car door disassembly and assembly equipment according to any one of claims 3 to 5, characterized in that: The damping braking mechanism is located at the rotating joint of the folding arm assembly, and locks or releases the rotational movement of the folding arm by changing the magnitude of the friction force. The damping braking mechanism includes friction plates and a micro drive device for adjusting the pressure between the friction plates. The damping force is adjusted and locked by changing the pressure through the micro drive device.

7. The railway freight car door disassembly and assembly equipment according to claim 1, characterized in that: The mobile platform is also equipped with a special rack for stacking disassembled truck doors.

8. The railway freight car door disassembly and assembly equipment according to claim 1, characterized in that, The electric door clamp includes: Clamping frame, used to connect lifting devices; An electric telescopic device is mounted on the clamp frame; At least one pair of latches are connected to the electric telescopic device and can move to both sides under the drive of the electric telescopic device to lock the door slot. A control button, located on the clamp frame, is used to control the operation of the electric telescopic device; The electric telescopic device includes: The slider is secured to the slider by a clip. A screw is threadedly connected to a slider; the screw is provided with a clamping part. An electric motor drives the screw to rotate; The screw fixing block, in conjunction with the clamping part, restricts the axial displacement of the screw; The rotational motion of the screw is converted into the linear motion of the slider, which in turn drives the latch to lock the door in place.

9. The railway freight car door disassembly and assembly equipment according to claim 8, characterized in that: Each latch is independently driven by one of the aforementioned electric telescopic devices.

10. The railway freight car door disassembly and assembly equipment according to claim 8 or 9, characterized in that: The clamp frame is also equipped with a handle; the control button is located on the handle; one end of the handle is fixedly connected to the clamp frame, and the other end abuts against the outer wall of the door after the door is clamped.

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