Tool for lifting inspection cover plate of pit type car lifting jack

Abstract

The invention relates to the technical field of train overhaul, in particular to a tool for lifting an overhaul cover plate of a pit type car lifting jack. A main frame in the tool comprises a workbench and a support, one end of the support is fixedly connected to the lower surface of the workbench, and an opening is formed in the other end of the support; the safety locking pin and the locking disc are located above and below the workbench respectively. The hand wheel and the speed reducer are located above and below the workbench respectively, the bearing seat and the pulley are fixedly connected to the lower surface of the workbench, the rotating shaft is movably connected to the bearing seat and penetrates through the locking disc and the speed reducer, one end of the steel wire rope is connected with the overhaul cover plate through the movable hanging ring, and the other end of the steel wire rope is connected with the rotating shaft through the pulley. The support is fixedly connected to the inner wall of the support, and the vertical distance between the side, close to the ground, of the limiting mechanism and the ground is larger than the thickness of the overhaul cover plate. Compared with the prior art, the device has the advantages that the labor intensity of subway maintenance workers is remarkably relieved, and the working efficiency and the operation safety are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of train maintenance, and particularly to a tool for lifting the maintenance cover plate of a pit-type car lifter. Background Art

[0002] The pit-type car lifter plays a crucial role in the overhaul of subway vehicles. It is an essential important device involved in train decoupling and bogie separation; its maintenance also needs to be carried out strictly according to the level of important equipment. Since the pit-type car lifter is a large-scale lifting device placed underground and is in a closed state when not in use, in order to facilitate the maintenance of the equipment, the manufacturer will reserve necessary maintenance openings to facilitate the maintenance personnel to enter and exit the pit; and in order to facilitate the entry and exit of the maintenance personnel and maintenance equipment, the maintenance openings are generally set relatively large, and at the same time, the maintenance cover plate also needs to have a certain load-bearing capacity, which results in the heavy weight of the maintenance cover plate. Every time the maintenance personnel enter the pit for maintenance, they need the assistance of multiple people to move the maintenance cover plate away before they can enter; every maintenance requires the assistance of multiple people, which is not only time-consuming and laborious with low efficiency, but also has potential safety hazards. Therefore, how to improve the work efficiency of the maintenance personnel and reduce the labor intensity of the maintenance personnel has become a problem to be solved in this field. Summary of the Invention

[0003] The purpose of the present invention is to overcome the defects that the work efficiency of the maintenance personnel is relatively low and the labor intensity is relatively high during the maintenance of the pit-type car lifter in the above-mentioned prior art, and to provide a tool for lifting the maintenance cover plate of a pit-type car lifter.

[0004] The purpose of the present invention can be achieved by the following technical solutions:

[0005] The present invention provides a tool for lifting the maintenance cover plate of a pit-type car lifter. The tool is placed on the ground and includes a main body frame, a locking mechanism, and a lifting mechanism, a bracket, and a limiting mechanism located inside the main body frame.

[0006] The main body frame includes a workbench and a support. One end of the support is fixedly connected to the lower surface of the workbench, and the other end forms an opening of the main body frame.

[0007] The locking mechanism passes through the workbench. The locking mechanism includes a safety locking pin and a locking disk. The safety locking pin is located above the workbench, and the locking disk is located below the workbench.

[0008] The lifting mechanism includes a control element, a bearing block, a rotating shaft, a pulley, a steel wire rope, and a movable hanging ring. The control element includes a handwheel and a speed reducer, and passes through the workbench. The handwheel is located above the workbench, and the speed reducer is located below the workbench. The bearing block is fixedly connected to the lower surface of the workbench. The rotating shaft is movably connected to the bearing block and passes through the locking disc and the speed reducer. The pulley is fixedly connected to the lower surface of the workbench. One end of the steel wire rope is connected to the movable hanging ring, and the other end is connected to the rotating shaft through the pulley. The movable hanging ring is connected to the maintenance cover plate.

[0009] The limiting mechanism is fixedly connected to the bracket, and the bracket is fixedly connected to the inner wall of the support. The vertical distance between the side of the limiting mechanism close to the ground and the ground is greater than the thickness of the maintenance cover plate.

[0010] As a preferred technical solution, casters are installed at one end of the support away from the workbench.

[0011] As a preferred technical solution, the casters are equipped with a braking structure.

[0012] As a preferred technical solution, handrails are installed on the side wall of the workbench.

[0013] As a preferred technical solution, the handwheel is externally connected to a motor.

[0014] As a preferred technical solution, the control element further includes a mounting plate, and the speed reducer is fixedly connected to the lower surface of the workbench through the mounting plate.

[0015] As a preferred technical solution, the limiting mechanism includes an elastic ejector rod.

[0016] As a preferred technical solution, the side of the limiting mechanism close to the opening includes a buffer part.

[0017] As a preferred technical solution, the workbench includes a circular workbench.

[0018] As a preferred technical solution, the movable hanging ring includes a ring-shaped element and a fastener.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The present invention designs a locking mechanism, a lifting mechanism, a bracket and a limiting mechanism inside the main frame for the overhaul cover plate. When the movable lifting ring is connected to the overhaul cover plate, the staff can drive the rotating shaft by using a handwheel and a speed reducer with a large reduction ratio. The rotating shaft drives the steel wire rope to wind, and the steel wire rope drives the movable lifting ring, thereby driving the overhaul cover plate to lift. Only one person can complete the operation that previously required multiple people, which can greatly reduce the labor intensity of the staff, save effort for the staff, save manpower, improve efficiency, and also improve the safety of operation;

[0021] 2. The present invention designs the main frame in the form of a workbench, which is convenient for on-site staff to place tools and testing equipment, and provides a stable operation platform in actual on-site operation, which can provide great convenience for overhaul personnel;

[0022] 3. The present invention sets a limiting mechanism. During the process of lifting the overhaul cover plate by using the movable lifting ring, the cover plate will touch the limiting mechanism, and the limiting mechanism presses against the overhaul cover plate, and the friction force will play a role in fixing the cover plate. In this way, during the pushing process, the overhaul cover plate will not shake significantly, improving the stability;

[0023] 4. The present invention can install casters with brakes under the main frame, which is convenient for movement and can ensure that the entire tooling remains stable when necessary, further improving the usability of the entire tooling and the safety of the operation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of the overall structure of the tooling in the embodiment of the present invention;

[0025] Figure 2 is a schematic diagram of the internal structure of the tooling in the embodiment of the present invention;

[0026] Figure 3 is a schematic diagram of the structure when the overhaul cover plate is fully lifted in the embodiment of the present invention;

[0027] Wherein: 1. Main frame; 11. Workbench; 12. Support; 111. Handrail; 121. Caster; 21. Safety locking pin; 22. Locking disc; 311. First bearing seat; 312. Second bearing seat; 32. Rotating shaft; 33. Pulley; 34. Steel wire rope; 35. Movable lifting ring; 36. Handwheel; 37. Speed reducer; 38. Mounting plate; 41. First elastic ejector rod; 42. Second elastic ejector rod; 43. Third elastic ejector rod; 44. Fourth elastic ejector rod; 51. First bracket; 52. Second bracket. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0029] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship when the product of the invention is normally placed. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0030] In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, "a plurality" means two or more, unless otherwise specifically defined.

[0031] Embodiment:

[0032] As Figure 1 and Figure 2 shown, this embodiment provides a tool for lifting the maintenance cover plate of a pit-type car lifter. The tool includes a main frame 1, a locking mechanism, and a lifting mechanism, a bracket, and a limiting mechanism located inside the main frame 1. The main frame 1 includes a workbench 11 and a support 12, and an armrest 111 is installed on the side wall of the workbench 11.

[0033] In this embodiment, the workbench 11 is a rectangular plate-like structure, and the support 12 includes four vertical connecting rods and four horizontal connecting rods. The four vertical connecting rods are respectively fixedly connected to the four corners of the workbench 11, and one end of each vertical connecting rod is perpendicular to the lower surface of the workbench 11, and the other end is equipped with a caster, and brakes can be installed on all four casters. Taking one of the vertical connecting rods as an example, a caster 121 is installed at the other end, that is, the end far from the workbench 11. The two ends of each horizontal connecting rod are respectively connected to the ends of two vertical connecting rods far from the workbench 11. The ends of the four vertical connecting rods far from the workbench 11 and the horizontal connecting rods together form the opening of the main frame 1. Among them, a set of opposite horizontal connecting rods are higher than the other set of opposite horizontal connecting rods in height, so as to install the limiting mechanism and ensure that the top of the maintenance cover is lifted in place.

[0034] The locking mechanism passes through the workbench 11 and includes a safety locking pin 21 and a locking disc 22. The safety locking pin 21 is located above the workbench, and the locking disc 22 is located below the workbench 11.

[0035] The lifting mechanism includes a control element, a first bearing seat 311, a second bearing seat 312, a rotating shaft 32, a pulley 33, a steel wire rope 34 and a movable lifting ring 35. The control element includes a handwheel 36, a speed reducer 37 and a mounting plate 38, and the control element passes through the workbench. The handwheel 36 is located above the workbench 11, the speed reducer 37 is located below the workbench 11, and the speed reducer 37 is fixedly connected to the lower surface of the workbench 11 through the mounting plate 38.

[0036] A plurality of bearing seats can be fixedly connected to the lower surface of the workbench 11. The bearing seats are used to fix the rotating shaft 32, and through the cooperation with the rotating shaft 32, the pulley 33 and the steel wire rope 34, the rotational motion of the rotating shaft 32 is converted into the linear motion of the movable lifting ring 35. Figure 2 The case of two bearing seats is shown. From the perspective in the figure, the first bearing seat 311 is installed on the left side of the speed reducer 37, and the second bearing seat 312 is installed on the right side of the speed reducer 37.

[0037] The rotating shaft 32 passes through the first bearing seat 311, the locking disc 22, the speed reducer 37 and the second bearing seat 312 in sequence, and is movably connected to the two bearing seats, and can rotate in the bearing seats under the drive of the speed reducer 37.

[0038] The pulley 33 is fixedly connected to the lower surface of the workbench 11. One end of the steel wire rope 34 is connected to the movable lifting ring 35, and the other end is connected to the rotating shaft 32 through the pulley 33. Fixed holes are provided at both ends of the rotating shaft 32 for fixing each steel wire rope.

[0039] The movable lifting ring 35 includes a ring-shaped element and a fastener. The fastener can be selected as a screw, which matches the threaded hole on the upper surface of the maintenance cover plate. When operating, the screw can be screwed on the maintenance cover plate.

[0040] In this embodiment, a total of 4 pulleys, 4 steel wire ropes and 4 corresponding movable lifting rings are provided.

[0041] The limiting mechanism includes a first elastic ejector rod 41, a second elastic ejector rod 42, a third elastic ejector rod 43 and a fourth elastic ejector rod 44. Among them, the first elastic ejector rod 41 and the second elastic ejector rod 42 are fixedly connected below the first bracket 51, the third elastic ejector rod 43 and the fourth elastic ejector rod 44 are fixedly connected below the second bracket 52, and both ends of the first bracket 51 and the second bracket 52 are respectively fixedly connected between a set of relatively horizontal ejector rods with a higher height. The elastic ejector rod can be a spring ejector rod.

[0042] It should be noted that the vertical distance between the side of the 4 elastic ejector rods close to the ground and the ground is greater than the thickness of the maintenance cover plate. The reason is that, as Figure 3 shown, during the process of controlling the lifting of the maintenance cover plate, the upper surface of the maintenance cover plate will touch the elastic ejector rod, and the elastic ejector rod presses against the maintenance cover plate, and the frictional force will play a role in fixing the cover plate. The aforementioned distance requirement can enable the maintenance cover plate to be fully lifted and completely accommodated by the tooling, facilitating subsequent operations after movement.

[0043] The working principle of the aforementioned tooling is as follows:

[0044] This tooling uses a speed reducer 37 to drive a rotating shaft 32 to rotate. Two wire rope fixing holes are provided on each side of the rotating shaft 32 to fix each wire rope; after the movable lifting rings at the ends of each wire rope are connected to the maintenance cover plate, turn the handwheel 36, and the speed reducer 37 drives the rotating shaft 32 to move together. When the rotating shaft 32 moves, it simultaneously drives each wire rope to wind around the rotating shaft 32, so as to achieve the effect of lifting the maintenance cover plate; at the same time, for safety reasons, a locking disc 22 is provided on the rotating shaft 32 on one side of the speed reducer 37, which is used in cooperation with the safety locking pin 21 above the workbench 11 to lock the speed reducer 37 and increase safety. In actual operation, it greatly facilitates the staff, improves work efficiency, and better meets the on-site work requirements.

[0045] The aforementioned tooling is designed to be movable for convenient operation by personnel. The operation process of moving the maintenance cover plate out of the maintenance opening includes:

[0046] (1) Push the tooling directly above the maintenance cover plate of the car body jacking machine, and step on the brakes on each caster to make the tooling firmly stop directly above the maintenance cover plate;

[0047] (2) Screw each movable lifting ring to the corresponding position of the maintenance cover plate, turn the handwheel 36, the speed reducer 37 will drive the rotating shaft 32 to rotate, and the rotating shaft 32 will drive each wire rope to make a winding movement, so that the maintenance cover plate connected to each movable lifting ring moves upward in a straight line;

[0048] (3) When the maintenance cover plate is lifted to be tightly pressed against each elastic ejector rod, the safety locking pin 21 is toggled, and the safety locking pin 21 is inserted into the hole of the locking disc 22 to achieve the locking effect and increase safety;

[0049] (4) Release the brakes on each caster, and push the tooling to other positions to clear the maintenance opening to facilitate the entry and exit of maintenance personnel.

[0050] The process of putting the maintenance cover plate back into the maintenance opening includes:

[0051] (1) Push the tooling with the maintenance cover plate directly above the maintenance cover plate of the car lift, step on the brakes on each caster, and make the tooling stop stably directly above the maintenance cover plate;

[0052] (2) Toggle the safety locking pin 21 in the reverse direction to unlock the locking mechanism, and rotate the handwheel 36 in the reverse direction. Utilize the cooperation of each component of the lifting mechanism to make the maintenance cover plate connected to each movable lifting ring move downward in a straight line;

[0053] (3) When the maintenance cover plate covers the maintenance opening, unscrew each movable lifting ring from the corresponding position of the maintenance cover plate, and rotate the handwheel 36 in the reverse direction again to make each movable lifting ring move upward in a straight line and reset;

[0054] (4) Release the brakes on each caster, and push the tooling to other positions.

[0055] In some other embodiments, the handwheel 36 can be externally connected to a motor to further reduce the manual labor burden.

[0056] In some other embodiments, one side of the limiting mechanism close to the opening includes a buffer portion. When the maintenance cover plate is lifted to be tightly pressed against each elastic ejector rod, it can reduce the damage to the upper surface of the maintenance cover plate caused by collision and vibration, and extend the service life of the maintenance cover plate.

[0057] In some other embodiments, the workbench 11 can be a circular workbench to effectively reduce the risk of injury to staff caused by rectangular sharp corners and improve safety during the operation process.

[0058] The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations based on the concept of the present invention without creative labor. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field of the present invention through logical analysis, reasoning, or limited experiments based on the concept of the present invention on the basis of the prior art should fall within the protection scope determined by the claims.

Claims

1. A tooling for lifting the maintenance cover plate of a pit-type car lift, the tooling being placed on the ground, characterized in that, The tooling includes a main frame, a locking mechanism, and a lifting mechanism, a bracket, and a limiting mechanism located inside the main frame. The main frame includes a workbench and a support. One end of the support is fixedly connected to the lower surface of the workbench, and the other end forms the opening of the main frame. The locking mechanism passes through the workbench. The locking mechanism includes a safety locking pin and a locking disc. The safety locking pin is located above the workbench, and the locking disc is located below the workbench. The lifting mechanism includes a control element, a bearing seat, a rotating shaft, a pulley, a steel wire rope, and a movable hanging ring. The control element includes a handwheel and a speed reducer and passes through the workbench. The handwheel is located above the workbench, and the speed reducer is located below the workbench. The bearing seat is fixedly connected to the lower surface of the workbench. The rotating shaft is movably connected to the bearing seat and passes through the locking disc and the speed reducer. The pulley is fixedly connected to the lower surface of the workbench. One end of the steel wire rope is connected to the movable hanging ring, and the other end is connected to the rotating shaft through the pulley. The movable hanging ring is connected to the maintenance cover plate. The limiting mechanism is fixedly connected to the bracket, and the bracket is fixedly connected to the inner wall of the support. The vertical distance between the side of the limiting mechanism close to the ground and the ground is greater than the thickness of the maintenance cover plate.

2. The tooling for lifting the maintenance cover plate of the pit-type car lifter according to claim 1, characterized in that, Casters are installed at one end of the support away from the workbench.

3. The tooling for lifting the inspection cover plate of the pit-type car lifter according to claim 2, characterized in that, The casters are equipped with a braking structure.

4. The tooling for lifting the maintenance cover plate of the pit-type car lifter according to claim 1, wherein, Handrails are installed on the side wall of the workbench.

5. The tooling for lifting the inspection cover plate of the pit-type car lifter according to claim 1, characterized in that, The handwheel is externally connected to a motor.

6. The tooling for lifting the inspection cover plate of the pit-type car lifter according to claim 1, characterized in that, The control element further includes a mounting plate, and the speed reducer is fixedly connected to the lower surface of the workbench through the mounting plate.

7. The tooling for lifting the inspection cover plate of the pit-type car lift according to claim 1, characterized in that The limiting mechanism includes an elastic ejector rod.

8. The tooling for the maintenance cover plate lifting of the pit-type car lifter according to claim 1, characterized in that, One side of the limiting mechanism close to the opening includes a buffer portion.

9. The tooling for lifting the maintenance cover plate of the pit-type car lift according to claim 1, characterized in that, The workbench includes a circular workbench.

10. The tooling for lifting the inspection cover plate of the pit-type car lifter according to claim 1, characterized in that, The movable hanging ring includes an annular element and a fastener.

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