Lifting device and working table for disassembling and overhauling motor car gear box

Abstract

The lifting device comprises a machine cabinet, a lifting mechanism and a controller, the lifting mechanism is fixedly arranged in the machine cabinet, the controller is arranged on the side edge of the machine cabinet and electrically connected with the lifting mechanism, and the output end of the lifting mechanism extends to the top of the machine cabinet and is fixedly connected with a supporting seat. A limiting part suitable for limiting the axle to horizontally move in the radial direction is arranged at the top of the supporting base. The controller is used for controlling the lifting mechanism to act, so that the supporting seat is driven to ascend and descend, the axle is limited by the limiting part at the top of the supporting seat, the axle is prevented from being separated from the supporting seat, the axle is lifted to a proper height, a worker can conveniently disassemble and overhaul a gear box installed on the axle, and the working efficiency is improved. Compared with an existing crane hoisting tool, the crane hoisting tool is higher in safety, meanwhile, the tedious procedure that a crane is connected with an axle for multiple times for hoisting is omitted, and the disassembling and overhauling efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of maintenance of EMU gearboxes, in particular to a lifting device and a working platform for disassembling and maintaining an EMU gearbox. Background Art

[0002] The construction and operation of high-speed railways have driven the rapid development of rail transit equipment. High-speed EMUs and their key core components have emerged from scratch, from learning to catching up, and the R & D level is far ahead. The gearbox is a core component on the power bogie of high-speed EMUs and is the core unit for energy conversion and transmission of high-speed EMUs. The quality of its working performance directly affects the safety and reliability of the operation of high-speed trains. Therefore, it is necessary to regularly disassemble and maintain the gearboxes of high-speed EMUs.

[0003] During the overseas maintenance process, when disassembling the axle end of the EMU gearbox during the fourth-level maintenance, it is necessary to disassemble the components at both ends of the motor side and the wheel side and horizontally remove them from the axle part. At present, the main disassembly method is to horizontally place the axle gearbox on the tooling table and support, and it is necessary to use a traveling crane to assist in lifting multiple times to disassemble the gearbox, with low process efficiency and certain safety hazards. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a lifting device and a working platform for disassembling and maintaining an EMU gearbox in view of the deficiencies of the prior art, which can lift the axle to a height convenient for disassembling and maintaining the gearbox, without using a traveling crane for lifting, not only making it safer to use, but also eliminating the cumbersome process of connecting the axle to the traveling crane multiple times for lifting, and improving the efficiency of disassembly and maintenance.

[0005] The technical solution for realizing the purpose of the utility model is as follows:

[0006] A lifting device for disassembling and maintaining an EMU gearbox includes a cabinet, a lifting mechanism fixedly arranged in the cabinet, and a controller arranged on the side of the cabinet and electrically connected to the lifting mechanism. The output end of the lifting mechanism extends to the top of the cabinet and is fixedly connected with a support seat, and a limiting part adapted to limit the horizontal movement of the axle in the radial direction is arranged on the top of the support seat.

[0007] Further, the limiting part is a V-shaped notch centrally arranged on the top of the support seat.

[0008] Further, support rollers are symmetrically arranged on the two inclined surfaces of the V-shaped notch, and the support rollers are rotatably installed on the support seat.

[0009] Further, the support rollers are made of hard resin to avoid scratching the surface of the axle.

[0010] Further, an arc-shaped cover plate is rotatably installed on one side of the support base, and a pin hole is provided on the other side. A chain safety pin is connected to the free end of the arc-shaped cover plate and is adapted to pass through the pin hole and be fixed.

[0011] Further, the arc-shaped cover plate is made of hard metal material, and a pressure prevention strip is provided on the side facing the V-shaped notch.

[0012] Further, a handle is provided on the side of the arc-shaped cover plate away from the V-shaped notch, which is convenient for the operator to pull the arc-shaped cover plate to rotate in the reverse direction and open it after the disassembly and maintenance are completed.

[0013] Further, the lifting mechanism is a hydraulic station and a hydraulic cylinder that is in oil circuit communication with the hydraulic station. The controller is electrically connected to the hydraulic station. The end of the piston rod of the hydraulic cylinder is vertically upward and is fixedly connected to the support base.

[0014] Further, a displacement sensor is provided on the hydraulic cylinder to sense the extension distance of the piston rod and avoid exceeding the maximum stroke of the hydraulic cylinder.

[0015] Further, guide rods are symmetrically provided on both sides of the hydraulic cylinder and are installed in the cabinet. The ends of the guide rods penetrate through the top of the cabinet and are fixedly connected to the support base.

[0016] Further, scales are provided on the guide rods.

[0017] Further, the controller includes a box body and a control main board fixedly provided in the box body. An up button, a down button and an emergency stop button that are electrically connected to the control main board are respectively provided on the surface of the box body from top to bottom, which is convenient for operation.

[0018] A workbench for disassembling and overhauling a high-speed train gearbox includes a base and three sets of lifting devices arranged in sequence from left to right along the length direction of the base, namely a first component, a second component and a third component. The first component is fixedly installed on the base, and the second component and the third component are movably installed on the base along the length direction of the base.

[0019] Further, a set of heavy-duty guide rails arranged in parallel are fixedly provided on the base. The second component and the third component are slidably connected to the base through the heavy-duty guide rails.

[0020] Further, a locking part is connected between the bottoms of the second component and the third component and the heavy-duty guide rails, so as to lock the second component and the third component when they are moved to appropriate positions, and further improve the stability of the overall structure.

[0021] Adopting the above technical solutions, the utility model has the following beneficial effects:

[0022] (1) The utility model controls the lifting mechanism through a controller, thereby driving the support base to rise and fall, and limiting the axle by the limiting part at the top of the support base to prevent the axle from detaching from the support base, realizing lifting the axle to an appropriate height, facilitating workers to disassemble and repair the gearbox installed on the axle. Compared with the existing overhead crane lifting tooling, it has higher safety, and at the same time saves the cumbersome process of the overhead crane connecting the axle for lifting multiple times, improving the efficiency of disassembly and repair.

[0023] (2) The limiting part of the utility model adopts a V-shaped notch, with a simple structure, and the V-shaped notch is centrally arranged, making the bearing center of gravity located in the middle of the whole device, preventing tipping and improving the stability of the overall structure.

[0024] (3) The utility model is additionally provided with a rotatable support roller to reduce the surface friction of the axle and avoid abrasion of the axle due to rotational movement during disassembly of components such as the gearbox.

[0025] (4) The utility model is additionally provided with an arc-shaped cover plate with a chain-type safety pin, thereby buckling the axle in the V-shaped notch to prevent the axle from deviating and falling off due to vibration during the disassembly process, thus avoiding injuring the maintenance operation workers and further improving the maintenance safety.

[0026] (5) The utility model avoids direct contact between the arc-shaped cover plate made of hard metal material and the axle by arranging a pressure-proof strip on the inner ring of the arc-shaped cover plate, so as to prevent scratching of the axle surface.

[0027] (6) The lifting mechanism of the utility model adopts hydraulic drive, with a simple structure, large transmission power, low speed and stability.

[0028] (7) The utility model improves the stability of the lifting movement by additionally arranging a guide rod to bear the side force.

[0029] (8) The utility model can quickly adjust the height of the support base to an appropriate position according to the different heights of the operators by arranging scale lines on the guide rod, facilitating the disassembly work and adjusting the appropriate height according to the size of the axle gearbox, and avoiding interference during the disassembly and assembly of the gearbox.

[0030] (9) The operating platform of the utility model adopts three groups of lifting devices, and two of them are movably arranged, which is convenient to flexibly adjust the support points according to the requirements of the disassembly process during the disassembly of the gearbox, simplifies the disassembly and repair work, and improves the disassembly and repair efficiency.

[0031] (10) The utility model adopts a heavy-duty guide rail to realize the sliding connection between the lifting device and the base, with a simple structure and stable movement. Description of the Drawings

[0032] In order to make the content of the present utility model easier to be clearly understood, the following further detailed description of the present utility model is given according to specific embodiments in conjunction with the accompanying drawings, where:

[0033] Figure 1 It is a structural schematic diagram of the workbench for disassembling, inspecting and repairing the motor car gearbox of the present utility model;

[0034] Figure 2 It is a structural schematic diagram of the lifting device of the present utility model.

[0035] The reference numerals in the accompanying drawings are:

[0036] Base 100, first component 200, second component 300, third component 400, heavy-duty guide rail 500, cabinet 1, lifting mechanism 2, controller 3, support seat 4, V-shaped notch 4-1, guide rod 5, support roller 6, arc-shaped cover plate 7, anti-pressure strip 7-1, handle 7-2, chain safety pin 8. Specific embodiments

[0037] In order to better understand the above technical solutions, the following will further elaborate on the above technical solutions in conjunction with the accompanying drawings of the specification and specific embodiments.

[0038] (Embodiment 1)

[0039] As Figures 1 to 2 shown, the workbench for disassembling, inspecting and repairing the motor car gearbox includes a base 100 and three groups of lifting devices arranged in sequence from left to right along the length direction of the base, namely the first component 200, the second component 300 and the third component 400. Among them, the first component 200 is fixedly installed on the base 100, and the second component 300 and the third component 400 are movably installed on the base 100 along the length direction of the base. One end of the axle is supported by the first component 200, and the support points on the axle can be flexibly adjusted by the second component 300 and the third component 400 according to the process requirements of disassembling and inspecting the gearbox, simplifying the disassembling and inspecting work and improving the efficiency of disassembling and inspecting.

[0040] Specifically, a group of parallel heavy-duty guide rails 500 are fixedly arranged on the base 100. The second component 300 and the third component 400 are slidably connected to the base 100 through the heavy-duty guide rails 500, with a simple structure and stable movement. A locking part is connected between the bottoms of the second component 300 and the third component 400 and the heavy-duty guide rails 500, so as to lock the second component 300 and the third component 400 when they move to the appropriate positions, further improving the stability of the overall structure. The locking part can adopt existing structures such as locking bolts, which will not be elaborated here.

[0041] The lifting device includes a cabinet 1, a lifting mechanism 2, a controller 3, and a support base 4. The lifting mechanism 2 is fixedly arranged inside the cabinet 1 and includes a hydraulic station and a hydraulic cylinder that is in oil circuit communication with the hydraulic station. The hydraulic station is electrically connected to the controller 3. The controller 3 is fixedly installed on the front side of the cabinet 1 and is electrically connected to the lifting mechanism 2 to control the operation of the lifting mechanism 2. It includes a box body and a control main board fixedly arranged inside the box body. On the surface of the box body, there are respectively arranged an up button, a down button, and an emergency stop button that are electrically connected to the control main board from top to bottom, which is convenient for operation. The piston rod of the hydraulic cylinder is arranged vertically upward, and its end penetrates through the top of the cabinet 1 and is fixedly connected to the support base 4. In the middle of the top of the support base 4, there is a V-shaped notch 4-1, which serves as a limiting part to limit the horizontal movement of the axle in the radial direction and prevent the axle from detaching from the support base 4. A displacement sensor is arranged on the hydraulic cylinder to sense the extension distance of the piston rod and avoid exceeding the maximum stroke of the hydraulic cylinder. By driving the lifting of the support base 4 through the lifting mechanism 2, the axle can be lifted to an appropriate height, facilitating the workers to disassemble and repair the gearbox installed on the axle. Compared with the existing overhead crane lifting tooling, it has higher safety, and at the same time, it saves the cumbersome process of connecting the axle by the overhead crane multiple times and improves the efficiency of disassembly and repair.

[0042] To improve the stability of the lifting movement, in this embodiment, guide rods 5 are symmetrically arranged on both sides of the hydraulic cylinder and are installed inside the cabinet 1. The ends of the guide rods 5 penetrate through the top of the cabinet 1 and are fixedly connected to the support base 4. The guide rods 5 play a good guiding role, and at the same time, the guide rods 5 bear the lateral force, thereby improving the stability of the lifting movement. There are scales on the guide rods, so that the height of the support base 4 can be quickly adjusted to an appropriate position according to the different heights of the operators, facilitating the disassembly work and adjusting the appropriate height according to the size of the axle gearbox, and avoiding the phenomenon of collision and interference during the disassembly and assembly of the gearbox.

[0043] To reduce the surface friction of the axle, in this embodiment, support rollers 6 are symmetrically arranged on the two inclined surfaces of the V-shaped notch 4-1. The support rollers 6 are rotatably installed on the support base 4 to prevent the axle from rotating and being scratched during the disassembly of components such as the gearbox. The support rollers 6 are made of hard resin to further prevent scratching the surface of the axle.

[0044] In order to further improve the safety of maintenance, an arc-shaped cover plate 7 is rotatably installed on one side of the support seat 4, and a pin hole is provided on the other side. The free end of the arc-shaped cover plate 7 is connected with a chain-type safety pin 8 suitable for passing through the pin hole and fixing, so as to buckle the axle in the V-shaped notch 4-1 to prevent the axle from falling off due to vibration displacement during the disassembly process, thereby avoiding injuring the maintenance operator and further improving the safety of maintenance. The arc-shaped cover plate 7 is made of hard metal and an anti-pressure strip 7-1 is provided on the side facing the V-shaped notch 4-1 to prevent the arc-shaped cover plate 7 made of hard metal from directly contacting the axle and causing scratches on the axle surface. A handle 7-2 is provided on the side of the arc-shaped cover plate 7 away from the V-shaped notch 4-1, so that the operator can pull the arc-shaped cover plate 7 in the opposite direction to rotate it open after the disassembly and maintenance are completed.

[0045] In this embodiment, the controller 3 controls the action of the lifting mechanism 2, thereby driving the support seat 4 to rise and fall, and the limiting part on the top of the support seat 4 limits the axle to prevent the axle from leaving the support seat, thereby lifting the axle to a suitable height, making it convenient for workers to disassemble and repair the gearbox installed on the axle. Compared with the existing crane lifting tooling, it is safer and eliminates the tedious process of connecting the crane to the axle for lifting multiple times, thereby improving the efficiency of disassembly and maintenance.

[0046] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A lifting device for disassembling and repairing a gearbox of a motor vehicle, characterized in that: It includes a cabinet, a lifting mechanism fixed in the cabinet, and a controller arranged on the side of the cabinet and electrically connected to the lifting mechanism. The output end of the lifting mechanism extends to the top of the cabinet and is fixedly connected to a support seat. The top of the support seat is provided with a limit part suitable for limiting the horizontal movement of the axle in the radial direction.

2. The lifting device for disassembling and repairing a motor vehicle gearbox according to claim 1 is characterized in that: The limiting portion is a V-shaped notch centrally arranged on the top of the support seat.

3. The lifting device for disassembling and repairing a motor vehicle gearbox according to claim 2 is characterized in that: Support rollers are symmetrically arranged on the two inclined surfaces of the V-shaped notch, and the support rollers are rotatably mounted on the support seat.

4. The lifting device for disassembling and repairing a motor vehicle gearbox according to claim 3 is characterized in that: An arc-shaped cover plate is rotatably mounted on one side of the support seat, and a pin hole is provided on the other side. The free end of the arc-shaped cover plate is connected with a chain-type safety pin suitable for passing through the pin hole and being fixed.

5. The lifting device for disassembling and repairing a motor vehicle gearbox according to claim 4 is characterized in that: The arc-shaped cover plate is made of hard metal and is provided with an anti-pressure strip on one side facing the V-shaped notch.

6. The lifting device for disassembling and repairing a gearbox of a motor vehicle according to claim 1, characterized in that: The lifting mechanism is a hydraulic station and a hydraulic cylinder connected to the oil circuit of the hydraulic station. The controller is electrically connected to the hydraulic station. The piston rod end of the hydraulic cylinder is vertically arranged upward and fixedly connected to the support seat.

7. The lifting device for disassembling and repairing a motor vehicle gearbox according to claim 6, characterized in that: Guide rods installed in the cabinet are symmetrically arranged on both sides of the hydraulic cylinder, and ends of the guide rods pass through the top of the cabinet and are fixedly connected to the support seat.

8. The lifting device for disassembling and repairing a motor vehicle gearbox according to claim 7, characterized in that: The guide rod is provided with a scale.

9. A workbench for disassembling and repairing a gearbox of a motor vehicle, characterized in that: The invention comprises a base and three groups of lifting devices as described in any one of claims 1 to 8 arranged from left to right along the length direction of the base, which are respectively a first component, a second component and a third component. The first component is fixedly mounted on the base, and the second component and the third component are movably mounted on the base along the length direction of the base.

10. The workbench for disassembling and repairing a motor vehicle gearbox according to claim 9, characterized in that: A group of heavy-duty guide rails arranged in parallel are fixedly arranged on the base.

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