An electric clamp for railway freight car doors

Abstract

This utility model provides an electric clamp for railway freight car doors, comprising: a clamp frame for connecting a lifting device; an electric telescopic device mounted on the clamp frame; at least one pair of latches connected to the electric telescopic device, capable of moving laterally under the drive of the electric telescopic device to engage the door slot; and a control button mounted on the clamp frame for controlling the operation of the electric telescopic device. The electric telescopic device includes: a slider with latches fixed to it; a screw threadedly connected to the slider, with 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 motor drives the screw to rotate, converting the rotational motion of the screw into the linear motion of the slider, which in turn moves the latches laterally, thereby clamping or releasing the door. This utility model is simple to operate, safe and reliable, and highly applicable, improving the efficiency and safety of door assembly and disassembly.

Description

Technical Field

[0001] This utility model belongs to the field of lifting clamp technology, specifically relating to an electric clamp for clamping the doors of railway freight cars. Background Technology

[0002] With the development of railway freight car transportation in my country, the workload of freight car maintenance has been increasing year by year. During the maintenance of railway freight car bodies, it is often necessary to disassemble and replace severely damaged or deformed doors. The disassembly and assembly of railway freight car doors is a heavy and important task, requiring specialized tools and equipment to ensure operational safety and efficiency.

[0003] Existing door clamps mainly take the following forms:

[0004] Manual clamps: Clamping is achieved by manually rotating bolts or turning levers, which is cumbersome and the clamping force is unstable.

[0005] Pneumatic clamps: rely on compressed air for operation, require connection to an air source, and have limited flexibility;

[0006] Simple steel hook: It uses a hook-shaped structure to hang on the car door, but it is not very safe and is easy to fall off.

[0007] These existing fixtures have the following problems:

[0008] The operation is complex: it requires workers to exert a great deal of physical strength, which increases the intensity of labor.

[0009] Insufficient safety: The clamping force is unstable, posing a risk of the door falling off;

[0010] Poor flexibility: It cannot adapt to car doors of various shapes and sizes;

[0011] Inefficient: The clamping and releasing process takes a long time, which affects the overall work efficiency.

[0012] Therefore, there is an urgent need to develop an electric clamp that is easy to operate, safe, reliable, and flexible to improve the safety and efficiency of disassembling and assembling railway freight car doors. Utility Model Content

[0013] To address the technical problems of existing clamps in clamping railway freight car doors, such as laborious operation, unstable clamping, inconvenient alignment, and reduced work efficiency, an electric clamp for railway freight car doors is provided. This clamp enables fast, stable, and precise clamping and release of the doors, reducing the burden of manual operation and improving work efficiency and safety.

[0014] To achieve the above objectives, this utility model provides an electric clamp for railway freight car doors, comprising:

[0015] Clamping frame, used to connect lifting devices;

[0016] An electric telescopic device is mounted on the clamp frame;

[0017] 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.

[0018] A control button, located on the clamp frame, is used to control the operation of the electric telescopic device;

[0019] The electric telescopic device includes:

[0020] The slider is secured to the slider by a clip.

[0021] A screw is threadedly connected to a slider; the screw is provided with a clamping part.

[0022] An electric motor drives the screw to rotate;

[0023] The screw fixing block, in conjunction with the clamping part, restricts the axial displacement of the screw;

[0024] 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.

[0025] The screw is driven to rotate by the motor, and the rotational motion of the screw is converted into the linear motion of the slider. The slider drives the latch to move to both sides, thereby locking or releasing the door. The screw fixing block can absorb the impact transmitted by the latch when locking or releasing the door, protecting the motor from impact and thus improving the life and reliability of the electric telescopic device.

[0026] In some optional embodiments of this invention, the screw is connected to the output end of the motor via a transmission mechanism. This transmission mechanism further reduces the impact transmitted to the motor, thereby enhancing the device's impact resistance.

[0027] Preferably, the transmission mechanism includes a speed reducer connected to the output end of the motor, and a coupling connected between the speed reducer and the screw. The speed reducer can reduce the motor speed and increase the torque, and the coupling can compensate for the alignment error between the screw and the speed reducer, and further buffer impact.

[0028] In some optional embodiments of this utility model, the clamp frame is provided with a sliding clamp block arranged along the movement direction of the buckle, 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.

[0029] In some optional embodiments of this invention, 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 car door, making it suitable for a wider variety of car doors.

[0030] In some optional embodiments of this utility model, the clamp frame is provided with a lifting ring for connecting the lifting device. The lifting ring facilitates the quick and convenient connection of the electric clamp to the wire rope or hook of the lifting equipment.

[0031] In some optional embodiments of this utility model, the clamp frame is further 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 car door after the door is clamped. This not only facilitates the operator's one-handed control of the clamping and releasing of the clamp, but also provides additional support or positioning reference.

[0032] Compared with the prior art, the electric clamp for disassembling and assembling railway freight car doors provided by this utility model has the following advantages:

[0033] 1. Easy to operate: The latch can be electrically driven to extend and retract via the control button, enabling quick clamping and release of the car door without manual force, greatly reducing the labor intensity of the operator.

[0034] 2. Safe and Reliable: The electric telescopic device provides a stable and controllable clamping force, ensuring that the door is firmly fixed during disassembly, assembly, and hoisting, preventing it from falling off and improving operational safety. The screw fixing block design effectively absorbs impact, improving the device's lifespan and reliability.

[0035] 3. Flexible and Applicable: The electrically adjustable telescopic distance of the latch allows it to adapt to doors with different slot spacing or edge features. Optional multiple independently driven latch designs further enhance its applicability.

[0036] 4. Increased Efficiency: The rapid electric clamping and releasing operation shortens the time for the clamp to connect and disconnect from the door, and combined with precise linear guidance, it improves the efficiency of door assembly and disassembly. The handle's auxiliary abutment function may also help with rapid positioning. Attached Figure Description

[0037] 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.

[0038] Figure 1 This is a schematic diagram showing the usage status of the electric clamp for railway freight car doors of this utility model;

[0039] Figure 2 This is a three-dimensional structural schematic diagram of the electric clamp for railway freight car doors of this utility model;

[0040] Figure 3 This is a front view schematic diagram of the electric clamp for railway freight car doors of this utility model; the clamp frame is not shown in the figure.

[0041] Figure 4 This is an exploded schematic diagram of the electric clamp and electric telescopic device for railway freight car doors of this utility model.

[0042] In the diagram: 1. Fixture frame; 2. Electric telescopic device; 3. Buckle; 4. Control button; 5. Slider; 6. Screw; 7. Clamping part; 8. Motor; 9. Screw fixing block; 10. Transmission mechanism; 11. Reducer; 12. Coupling; 13. Sliding clamp; 14. Groove; 15. Lifting ring; 16. Handle; 17. Door. Detailed Implementation

[0043] 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.

[0044] Example 1

[0045] like Figures 1 to 4 As shown, this embodiment provides an electric clamp for railway freight car doors, including a clamp frame 1, an electric telescopic device 2, at least one pair of latches 3, and a control button 4.

[0046] The clamp frame 1 is used to connect the lifting device and provide a support structure for the entire electric clamp. The clamp frame 1 can be made of metal and has sufficient strength and rigidity to withstand various stresses during the door lifting process. In this embodiment, the clamp frame 1 has a cuboid structure, which facilitates the installation of the electric telescopic device 2 and other components.

[0047] The electric telescopic device 2 is installed inside the clamp frame 1 and is used to provide the telescopic power for the buckle 3. The electric telescopic device 2 includes a slider 5, a screw 6, a motor 8, and a screw fixing block 9.

[0048] The slider 5 is fixedly connected to the buckle 3. In this embodiment, the buckle 3 can be connected to the slider 5 by welding, bolting, or other fixing methods. The slider 5 is connected to the screw 6 by a thread. When the screw 6 rotates, the slider 5 moves along the axial direction of the screw 6, thereby driving the buckle 3 to move to both sides, realizing the clamping or releasing of the door 17.

[0049] The screw 6 is provided with a clamping part 7, which can be a flange or a shoulder on the screw 6. It cooperates with the screw fixing block 9 to limit the axial displacement of the screw 6. This design allows the screw 6 to only rotate without axial movement, ensuring the accuracy and stability of the slider 5's movement.

[0050] The electric motor 8 is mounted inside the fixture frame 1 and is used to drive the screw 6 to rotate. The electric motor 8 can be a DC motor or an AC motor, and the appropriate power supply type should be selected according to the actual use environment. The output shaft of the electric motor 8 is connected to the screw 6, and the slider 5 is moved by rotating the screw 6.

[0051] The screw fixing block 9 is mounted on the fixture frame 1 and cooperates with the clamping part 7 of the screw 6 to limit the axial displacement of the screw 6. The screw fixing block 9 is usually made of wear-resistant material and can withstand frequent rotational friction. The design of the screw fixing block 9 can absorb the impact transmitted by the buckle 3 when clamping or releasing the door 17, protect the motor 8 from impact, extend the service life of the electric telescopic device 2, and improve the reliability of the entire fixture.

[0052] The latch 3 is connected to the slider 5 of the electric telescopic device 2 and can move to both sides under the drive of the electric telescopic device 2 to engage with the slot of the door 17. In this embodiment, the latch 3 is made of high-strength alloy steel, which has sufficient strength and wear resistance. The latch 3 is designed in a hook shape to facilitate insertion into the slot of the door 17 and secure clamping. The outer surface of the latch 3 can be rust-proofed to extend its service life.

[0053] In some specific embodiments of this utility model, the buckle 3 is L-shaped, including a horizontal portion and a vertical portion. The horizontal portion is connected to the slider 5, and the vertical portion is used to insert into the door groove for fixation. The design of the vertical portion allows it to be firmly locked into the door groove, preventing it from falling off during hoisting.

[0054] Control button 4 is mounted on the clamp frame 1 and is used to control the operation of the electric telescopic device 2. Control button 4 is connected to the motor 8 via a wire. The operator can control the start / stop and rotation direction of the motor 8 by pressing control button 4, thereby controlling the extension or retraction of the latch 3. In this embodiment, control button 4 is waterproof, adaptable to various harsh working environments.

[0055] In this embodiment, the maximum extension distance of the electric telescopic device 2 is not less than 50mm, so as to adapt to the spacing of door slots of different sizes.

[0056] The working principle of the electric clamp in this embodiment is as follows: First, the electric clamp is placed on the car door 17, so that the buckle 3 is aligned with the slot on the car door 17; then, the operator presses the control button 4 to start the motor 8; the motor 8 drives the screw 6 to rotate, and the rotation of the screw 6 drives the slider 5 to move to both sides, and the slider 5 drives the buckle 3 to extend into the slot of the car door 17 and lock it; after the clamping is completed, the lifting device can lift the electric clamp and move the car door 17 together to realize the disassembly and assembly of the car door 17; when it is necessary to release the car door 17, the operator presses the control button 4 again to change the rotation direction of the motor 8, the buckle 3 retracts, and the car door 17 is released.

[0057] During use, the screw fixing block 9 can effectively absorb the impact force generated by the buckle 3 when clamping or releasing the door 17, protecting the motor 8 and other components from damage and extending the service life of the equipment. At the same time, the telescopic mechanism driven by the motor 8 provides a stable and controllable clamping force, ensuring that the door 17 is firmly fixed during hoisting and is not easy to fall off, greatly improving operational safety.

[0058] Example 2

[0059] Based on Embodiment 1, in the electric clamp for railway freight car doors of this embodiment, the screw 6 is connected to the output end of the motor 8 via a transmission mechanism 10. The transmission mechanism 10 can further reduce the impact transmitted to the motor 8 and enhance the impact resistance of the device.

[0060] Specifically, the transmission mechanism 10 includes a reducer 11 connected to the output end of the motor 8, and a coupling 12 connecting the reducer 11 and the screw 6. The reducer 11 can reduce the speed of the motor 8 and increase the torque, making it more suitable for driving the screw 6 for precise rotational control. The coupling 12 can compensate for the alignment error between the screw 6 and the reducer 11 and further buffer impacts. In this embodiment, the coupling 12 is a flexible coupling with internal elastic elements, which can effectively absorb the impact and vibration during transmission, protecting the motor 8 and the reducer 11.

[0061] The design of this transmission mechanism 10 gives the electric clamp better impact resistance and stability, making it particularly suitable for long-term use in harsh working environments. The combination of the reducer 11 and coupling 12 not only protects the motor 8, but also improves the clamping force and control accuracy, enabling the electric clamp to better adapt to the clamping needs of various car doors 17.

[0062] Example 3

[0063] Based on Embodiment 1 or Embodiment 2, in the electric clamp for railway freight car doors of this embodiment, the clamp frame 1 is provided with a sliding clamp block 13 arranged along the movement direction of the buckle 3, and the slider 5 is provided with a groove 14 for accommodating the sliding clamp block 13. The buckle 3 moves in a straight line by the cooperation of the groove 14 and the sliding clamp block 13.

[0064] The sliding clamp 13 is fixed on the fixture frame 1 and arranged along the movement direction of the latch 3, providing linear motion guidance for the slider 5. The sliding clamp 13 can be made of wear-resistant material with a smooth surface to reduce frictional resistance between it and the slider 5.

[0065] In some embodiments, the sliding clamp 13 has a trapezoidal cross-sectional shape, which increases the contact area with the groove 14 and improves the stability of the guide.

[0066] The groove 14 on the slider 5 matches the shape of the sliding clamp 13 to accommodate the sliding clamp 13. An appropriate gap is maintained between the groove 14 and the sliding clamp 13 to ensure smooth movement of the slider 5 and prevent the slider 5 from wobbling or tilting during movement.

[0067] The cooperation between the groove 14 and the sliding clamp 13 ensures that the slider 5 and the driven buckle 3 move precisely in a straight line, preventing deviation or jamming during movement. This guiding mechanism makes the movement of the buckle 3 smoother and more precise, improving the working reliability and service life of the electric clamp.

[0068] In practical applications, to reduce friction, lubricating oil can be coated on the surface of the sliding clamp 13 or rolling bearings can be installed to further reduce the frictional resistance of the slider 5 during movement and extend the service life of the equipment.

[0069] Example 4

[0070] Based on any of the embodiments 1 to 3, in the electric clamp for the railway freight car door of this embodiment, each latch 3 is driven by an independent electric telescopic device 2.

[0071] In this embodiment, two independent electric telescopic devices 2 are installed on the fixture frame 1, and each electric telescopic device 2 drives a latch 3. Each electric telescopic device 2 includes its own independent slider 5, screw 6, motor 8, and screw fixing block 9. The two electric telescopic devices 2 can be controlled simultaneously by the control button 4, or they can be controlled independently.

[0072] This design allows for flexible adjustment of the position and clamping force of each latch 3 according to the specific structure of the door 17, making it suitable for a wider variety of doors 17. For example, the position and size of the slots may differ for different models of railway freight car doors 17. By independently controlling each latch 3, these differences can be better accommodated, improving the versatility of the fixture.

[0073] Furthermore, the independent drive design improves the reliability of the electric clamps. If one electric telescopic device 2 fails, the other can still function normally, ensuring that the door 17 will not accidentally fall off during hoisting and improving operational safety.

[0074] Example 5

[0075] Based on any one of the embodiments 1 to 4, in the electric clamp for the railway freight car door of this embodiment, the clamp frame 1 is provided with a lifting ring 15 for connecting the lifting device.

[0076] The lifting ring 15 is fixed at the top or center of the clamp frame 1 and is used to connect the wire rope or hook of lifting equipment such as cranes and jib cranes. The lifting ring 15 is usually made of high-strength alloy steel, which has sufficient strength to withstand the weight of the door 17 and the dynamic load during the lifting process. The lifting ring 15 can be designed to rotate, which facilitates the adjustment of the lifting direction and reduces the twisting of the wire rope.

[0077] The lifting ring 15 allows the electric clamp to be quickly and easily connected to the lifting equipment, improving work efficiency. At the same time, the reasonable positioning of the lifting ring 15 ensures the balance of the center of gravity during lifting, keeping the door 17 stable during the lifting process, reducing swaying, and improving safety.

[0078] Example 6

[0079] Based on any one of the embodiments 1 to 5, in the electric clamp for the railway freight car door of this embodiment, a handle 16 is also provided on the clamp frame 1; the control button 4 is provided on the handle 16; one end of the handle 16 is fixedly connected to the clamp frame 1, and the other end abuts against the outer wall of the door 17 after the door 17 is clamped.

[0080] The handle 16 is typically made of metal and its outer surface can be covered with insulating material to provide a comfortable grip. One end of the handle 16 is fixed to the clamp frame 1 by welding or bolting, while the other end is designed in a curved shape so that it can abut against the outer wall of the door 17 after the door 17 is clamped, providing auxiliary support and positioning.

[0081] The control button 4 is mounted on the handle 16, positioned within easy reach of the operator's fingers for convenient one-handed operation. This design allows the operator to easily press the control button 4 with their thumb or forefinger while holding the handle 16, controlling the extension or retraction of the latch 3 without releasing the handle 16, thus improving both convenience and safety.

[0082] The design of the handle 16 abutting against the outer wall of the door 17 provides additional support points. After the latch 3 clamps the door 17, the handle 16 contacts the outer wall of the door 17, forming a three-point support (two latches 3 and the handle 16), which increases the stability of the connection between the clamp and the door 17. At the same time, the handle 16 can also serve as a positioning reference, helping operators quickly determine the installation position of the electric clamp on the door 17, thus improving work efficiency.

[0083] In addition, the handle 16 also makes it easy for operators to move or adjust the position of the electric clamp by hand when not using the lifting equipment, increasing the flexibility and portability of the equipment.

[0084] 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 car door electrically powered clamp, characterized by, include: 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.

2. The electric clamp for railway freight car doors according to claim 1, characterized in that: The screw is connected to the output end of the motor via a transmission mechanism.

3. The electric clamp for railway freight car doors according to claim 2, characterized in that: The transmission mechanism includes a speed reducer connected to the output end of the motor and a coupling connected between the speed reducer and the screw.

4. The electric clamp for railway freight car doors according to claim 1, characterized in that: The fixture frame is provided with a sliding clamp block arranged along the direction of the buckle 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.

5. The electric clamp for railway freight car doors according to claim 1, characterized in that: Each latch is independently driven by one of the aforementioned electric telescopic devices.

6. The electric clamp for railway freight car doors according to claim 1, characterized in that: The clamp frame is equipped with a lifting ring for connecting the lifting device.

7. The electric clamp for railway freight car doors according to claim 1, 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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