Special tool for overhauling pantograph of high-speed motor train unit

Abstract

The utility model relates to a special tool for overhauling a pantograph of a high-speed motor train unit. The special tool comprises a supporting seat hook assembly, a flexible telescopic connecting assembly and a pantograph head arm hook assembly, the supporting seat hook assembly comprises a hook used for hooking a pantograph body base ring and a lantern ring, and the lantern ring is connected with the lower end of the hook. The pantograph head arm hook comprises two J-shaped structure hooks which are symmetrically arranged side by side and a connecting rod for connecting the two J-shaped structure hooks, and the two J-shaped structure hooks which are symmetrically arranged side by side are used for hooking a pantograph head cross rod of the pantograph body; the flexible telescopic connecting assembly comprises a lower flexible strip-shaped structure and an upper flexible strip-shaped structure, and a distance adjusting device is arranged between the lower flexible strip-shaped structure and the upper flexible strip-shaped structure. The overhauling quality of the motor train unit is guaranteed, the overhauling efficiency and safety are improved, the device can adapt to pantographs of different specifications and places, and popularization is facilitated.

Description

Technical Field

[0001] The utility model relates to a special tool for maintenance, in particular to a special tool for maintenance of a pantograph of a high-speed train set. Background Art

[0002] The pantograph is an important device for EMU operation. Its main function is to transfer the voltage on the contact network to the train to power it for operation. Whether the EMU can operate with electricity depends entirely on it. Therefore, inspection of the pantograph is an important part of daily maintenance. If any component on the pantograph is damaged, it will cause it to automatically lower the pantograph, seriously affecting the normal operation of the EMU and causing large-scale delays of subsequent EMUs. If serious arcing occurs during the pantograph lowering process, the ultra-high voltage of the contact network will cause breakdown, electrical corrosion, burning, etc. to the roof insulator bottle or the car body itself, and will also have secondary effects on the high-voltage equipment inside the vehicle.

[0003] Along with the reform of the maintenance process and system, the maintenance work items are also being optimized and improved. Due to the reduction of first-level maintenance inspection items, the number of personnel for roof pantograph inspection and measurement projects has been reduced from 2 to 1, and all roof work items are completed independently by one person. This has also caused inconvenience in some roof project operations. Through on-site inspections and video analysis, it has been found many times that the No. 1 position on the roof needs to perform leak detection, inspection, measurement and video recording of the carbon slide plate and air supply duct when the pantograph is raised. Since there is no one to cooperate, one person needs to hold the raised pantograph to the naked eye with one hand while holding the camera with the other hand to perform carbon slide plate leak detection, bow angle, spring box, cross bar inspection, measurement and video recording. This has been repeated several times and has caused inconvenience to the maintenance workers. At the same time, it was found that some maintenance workers sat on the pantograph or pressed the pantograph with their bodies to perform operations, which made it impossible to carefully and detailedly inspect every component of the pantograph, resulting in serious problems such as the EMU's inability to operate normally and possible damage to the vehicle caused by arcing. Utility Model Content

[0004] The utility model aims to solve the problem that after the reform of the existing EMU maintenance process and maintenance system, the inspection and measurement of the roof pantograph at position 1 on the roof is inconvenient and cannot be carried out in all directions, carefully and in detail by relying on a single person.

[0005] In order to solve the above problems, the technical solution adopted by the utility model is: a special tool for repairing the pantograph of a high-speed EMU, comprising a support base hook assembly, a flexible and retractable connection assembly and a bow head arm hook assembly;

[0006] The support base hook assembly includes a hook and a ring for hooking the base ring of the pantograph body, and the ring is connected to the lower end of the hook;

[0007] The pantograph arm hook assembly includes two J-shaped structural hooks arranged symmetrically side by side and a connecting rod connecting the two J-shaped structural hooks. The two J-shaped structural hooks arranged symmetrically side by side are used to hook the pantograph body pantograph crossbar;

[0008] The flexible and retractable connection assembly includes a lower flexible belt structure and an upper flexible belt structure, a distance adjustment device is provided between the lower flexible belt structure and the upper flexible belt structure, the distance adjustment device includes a threaded rod with an upper end fixedly connected to the upper flexible belt structure, a threaded collar threadedly connected to the threaded rod, and a hollow fixed rod, one end of the hollow fixed rod is slidably sleeved with the threaded collar, and the other end is fixedly connected to the lower flexible belt structure, a limiting structure is provided between the hollow fixed rod and the threaded collar, the limiting structure allows the threaded collar to rotate relative to the hollow fixed rod without falling off the hollow fixed rod; the upper end of the upper flexible belt structure is sleeved with the connecting rod, and the lower end of the lower flexible belt structure is sleeved with the collar.

[0009] Furthermore, the limiting structure includes a limiting ring provided at the upper inner end of the hollow fixing rod and an outwardly protruding annular structure provided at the lower end of the threaded collar; when the threaded collar slides in the hollow fixing rod, the limiting ring serves to block and limit the annular structure.

[0010] Furthermore, the hollow fixing rod is fixedly connected to the lower flexible belt structure through a lower rectangular block with a rectangular groove, the upper end of the lower flexible belt structure is inserted into the rectangular groove, and the lower flexible belt structure is locked and fixed by a locking bolt passing through the side of the lower rectangular block, and the threaded rod is connected to the upper flexible belt structure through the same structure as the lower rectangular block.

[0011] Furthermore, the hook is a hollow circular closed-loop T-shaped structure.

[0012] Furthermore, it also includes a bow head arm hook heat shrink tube, and the bow head arm hook heat shrink tube is sleeved on the bow head arm hook assembly.

[0013] Furthermore, the flexible and retractable connection component is a foldable and retractable green ribbon structure.

[0014] Furthermore, an LED light source is provided between the J-shaped structure hooks.

[0015] Furthermore, the two J-shaped structural hooks symmetrically arranged side by side can also be replaced by a whole piece of curved hook.

[0016] The beneficial effects and features of the utility model are:

[0017] 1. The utility model is a special tool for the maintenance of pantographs of high-speed EMUs. According to the on-site structural conditions, the support seat hook assembly and the pantograph arm hook assembly are designed in a targeted manner to meet the on-site use requirements. It can reduce the safety hazards of EMUs caused by the inability of one person to accurately check the pantograph, ensure the maintenance quality of EMUs, and greatly improve the maintenance efficiency and safety rate.

[0018] 2. The utility model is a special tool for repairing pantographs of high-speed EMUs. It can adapt to pantographs of different specifications and locations through a flexible and retractable connection component with adjustable distance, which is conducive to promotion.

[0019] 3. The utility model is a special tool for the maintenance of pantographs of high-speed EMUs. By making the body of the flexible and retractable connecting component a bright warning color, it can serve as a visual warning during the pantograph maintenance process, thereby avoiding the secondary risks caused by the tool being left on the roof of the EMU after the pantograph maintenance is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of a preferred embodiment of the utility model;

[0021] Figure 2 This is a schematic diagram of the overall structure of another preferred embodiment of the utility model (with a distance adjustment device);

[0022] Figure 3 yes Figure 2 The structural diagram is enlarged at the dotted line;

[0023] Figure 4 This is a schematic diagram of the partial structure of the rectangular block in the preferred embodiment of the present invention;

[0024] Figure 5 This is a structural diagram of the limiting ring and the annular structure of a preferred embodiment of the utility model;

[0025] Figure 6 This is a schematic diagram of the overall structure of another preferred embodiment of the utility model (from another angle, with LED light source);

[0026] Figure 7 This is a structural diagram of another preferred embodiment of the utility model (arc hook);

[0027] The reference numerals in the figures represent:

[0028] 1-Support seat hook assembly, 11-Hook, 12-Ring, 2-Flexible retractable connection assembly, 21-Lower flexible strip structure, 22-Lower rectangular block, 221-Rectangular slot, 222-Locking bolt, 23-Threaded collar, 231-Ring structure, 24-Threaded rod, 25-Upper rectangular block, 26-Upper flexible strip structure, 27-Hollow fixing rod, 271-Limiting ring, 3-Bow head arm hook assembly, 31-J-type structure hook, 32-Connecting rod, 4-Bow head arm hook heat shrink tubing, 5-LED light source, 6-Curved hook, 61-Wear-resistant rubber. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0030] Example 1:

[0031] Please refer to Figure 1 The embodiment of the utility model relates to a special tool for repairing a pantograph of a high-speed EMU, comprising a support base hook assembly 1, a flexible and retractable connection assembly 2 and a bow head arm hook assembly 3;

[0032] The support base hook assembly 1 includes a hook 11 and a ring 12 for hooking the base ring of the pantograph body, and the ring 12 is connected to the lower end of the hook 11;

[0033] The bow arm hook assembly 3 includes two symmetrically arranged J-shaped structural hooks 31 and a connecting rod 32 connecting the two J-shaped structural hooks. The two symmetrically arranged J-shaped structural hooks 31 are used to hook the pantograph crossbar. The bow arm hook assembly 3 is a double J-shaped structural hook. The double J-shaped structure (it can also be designed as a multi-J-shaped structural hook, such as three or four J-shaped structural hooks arranged side by side) can increase its contact surface and force points with the pantograph crossbar, ensuring an effective and reliable connection.

[0034] Please refer to Figure 2-Figure 4The flexible and retractable connection component 2 includes a lower flexible belt structure 21 and an upper flexible belt structure 26. A distance adjustment device is provided between the lower flexible belt structure 21 and the upper flexible belt structure 26. The distance adjustment device includes a threaded rod 24 fixedly connected to the upper flexible belt structure at the upper end, a threaded collar 23 threadedly connected to the threaded rod 24, and a hollow fixed rod 27. One end of the hollow fixed rod 27 is slidably sleeved with the threaded collar 23, and the other end is fixedly connected to the lower flexible belt structure 21. A limiting structure is provided between the hollow fixed rod 27 and the threaded collar 23. The limiting structure enables the threaded collar 23 to rotate relative to the hollow fixed rod 27 without falling out of the hollow fixed rod. When the threaded collar 23 rotates, the overall length of the threaded collar 23 and the threaded rod 24 will be extended or shortened, thereby realizing distance adjustment and relatively accurate pantograph position positioning adjustment; the upper end of the upper flexible belt structure 26 is sleeved with the connecting rod 32, and the lower end of the lower flexible belt structure 21 is sleeved with the collar 12.

[0035] Specifically, the limiting structure includes a limiting ring 271 provided at the upper end of the inner side of the hollow fixing rod 27, and an outwardly protruding annular structure 231 provided at the lower end of the threaded collar 23; when the threaded collar 23 slides in the hollow fixing rod 27, the limiting ring 271 serves to block and limit the annular structure 231.

[0036] Please refer to Figure 5 The hollow fixing rod 27 is fixedly connected to the lower flexible belt structure 21 through the lower rectangular block 22 with a rectangular groove 221. The upper end of the lower flexible belt structure 21 is inserted into the rectangular groove 221, and the lower flexible belt structure is locked and fixed by passing the locking bolt 222 through the side of the lower rectangular block 22. The threaded rod 24 is connected to the upper flexible belt structure 26 through the same structure as the lower rectangular block 22.

[0037] As a preferred solution, the hook 11 is a hollow circular closed-loop T-shaped structure.

[0038] As a preferred solution, a bow head arm hook heat shrink tube 4 is further included, which is sleeved onto the bow head arm hook assembly 3. The bow head arm hook heat shrink tube 4 is directly sleeved onto the bow head arm hook assembly 3 to protect the bow head arm hook assembly 3 from wear. When the bow head arm hook assembly 3 contacts the pantograph body's bow head crossbar, the bow head arm hook heat shrink tube 4 on the bow head arm hook assembly 3 can increase friction with the pantograph body's bow head crossbar and reduce direct metal contact wear on the pantograph body's bow head crossbar.

[0039] Example 2:

[0040] As a preferred solution, the difference from Example 1 is that the flexible and retractable connecting component is also a foldable and retractable green strip structure; the body color is green or reflective, which can serve as a visual warning during the pantograph maintenance process, avoiding the secondary risks caused by the special tooling left on the roof of the EMU after the pantograph maintenance is completed; it can be folded for easy carrying and storage during the operation

[0041] Example 3:

[0042] Please refer to Figure 6 As a preferred solution, the difference from Example 1 is that, in order to facilitate operation in poor light conditions, an LED light source 5 is further provided between the J-shaped structure hooks 31.

[0043] Example 4:

[0044] Please refer to Figure 7 As a preferred solution, this differs from Example 1 in that, to further increase the contact area, the two symmetrically arranged J-shaped hooks 31 can be replaced with a single curved hook 6. The inner side of the curved hook 6 is provided with wear-resistant rubber 61 to reduce damage to the pantograph head crossbar.

[0045] Example 5:

[0046] As a preferred solution, to enhance the operational safety of this tooling, an insulating protective layer is also provided. The insulating protective layer assembly includes an insulating coating covering the outer surfaces of the support base hook assembly 1, the flexible and retractable connection assembly 2, and the bow head arm hook assembly 3. The insulating coating is made of a high-voltage resistant insulating material with a thickness of 0.5-2 mm, preferably 1 mm. The high-voltage resistant insulating material can be selected from one or more of epoxy resin, polyurethane, or silicone rubber. The insulating protective layer assembly can effectively prevent maintenance personnel from accidentally contacting live parts during operation, significantly improving the safety of the tooling.

[0047] Specific usage:

[0048] Preparation work: The EMU needs to be parked in the depot and the wheel stopper should be set. Then the power of the EMU should be cut off and the pantograph should be lowered, and the contact network should be powered off and the grounding pole should be hung. After confirming that there is no power in the contact network, the maintenance personnel who go to the top of the EMU should borrow the card according to the process to climb onto the roof of the EMU.

[0049] Start the operation: first, the maintenance personnel who climb to the top walk on the anti-skid belt on the roof of the EMU or the three-layer maintenance platform to the pantograph, and then use the intercom to control the auxiliary maintenance personnel in the driver's cab to operate the driver's cab operation panel to raise the pantograph. After the pantograph is raised and touches the contact network, the maintenance personnel who climb to the top pulls the raised pantograph down by hand to the visual sight, hooks the bow head arm hook assembly 3 on the middle of the bow head cross bar of the pantograph body and checks its hook connection reliability, and then hooks the support seat hook 1 on the base ring of the pantograph body and checks its hook connection reliability; then slowly releases the pantograph that has been in an upward force state, and the flexible and retractable connection assembly 2 is in a straightened state under the action of the tension at both ends of the pantograph body bow head cross bar and the pantograph body base. The overall length of the flexible and retractable connection assembly 2 is adjusted by the distance adjustment device to adjust the pantograph position and confirm that its connection is in good condition; then the pantograph as a whole (including: carbon slide plate, bow angle, spring box, cross bar, air pipe) can be inspected and repaired.

[0050] This utility model addresses the safety risks associated with EMU pantograph inspections, which arise when a single operator needs to hold the raised pantograph with one hand and use a flashlight with the other to record the video, preventing them from inspecting the entire pantograph (including the carbon slide, pantograph angle, spring box, crossbar, and air pipe). This reduces the potential safety hazards associated with a single operator's inability to accurately inspect the pantograph, fills the gap in auxiliary tooling for pantograph inspection and measurement, and reduces pantograph maintenance time by 10 minutes per vehicle, reducing the workload for maintenance personnel and improving the quality of pantograph inspections, a key EMU operating equipment. The utility model can also be applied to the maintenance of operating equipment on electric locomotives and rail vehicles (subways, light rail, and trams) containing pantographs.

[0051] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the structural relationships and principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A special tool for high-speed train pantograph maintenance, characterized in that : comprising a support base hook assembly (1), a flexible and retractable connection assembly (2) and a bow head arm hook assembly (3); The support base hook assembly (1) comprises a hook (11) and a collar (12) for hooking the pantograph body base ring, wherein the collar (12) is connected to the lower end of the hook (11); The pantograph arm hook assembly (3) includes two J-shaped structural hooks (31) symmetrically arranged side by side and a connecting rod (32) connecting the two J-shaped structural hooks, wherein the two J-shaped structural hooks (31) symmetrically arranged side by side are used to hook the pantograph body pantograph crossbar; The flexible telescopic connection assembly (2) comprises a lower flexible belt-like structure (21) and an upper flexible belt-like structure (26), a distance adjustment device is provided between the lower flexible belt-like structure (21) and the upper flexible belt-like structure (26), the distance adjustment device comprising a threaded rod (24) whose upper end is fixedly connected to the upper flexible belt-like structure, a threaded collar (23) threadedly connected to the threaded rod (24), and a hollow fixed rod (27), one end of the hollow fixed rod (27) is slidably sleeved with the threaded collar (23), and the other end is fixedly connected to the lower flexible belt-like structure (21), a limiting structure is provided between the hollow fixed rod (27) and the threaded collar (23), the limiting structure enables the threaded collar (23) to rotate relative to the hollow fixed rod (27) without falling off the hollow fixed rod; the upper end of the upper flexible belt-like structure (26) is sleeved with the connecting rod (32), and the lower end of the lower flexible belt-like structure (21) is sleeved with the collar (12).

2. The special tool for high-speed train pantograph maintenance according to claim 1 is characterized in that: The limiting structure comprises a limiting ring (271) provided at the upper end of the inner side of the hollow fixing rod (27) and an outwardly protruding annular structure (231) provided at the lower end of the threaded collar (23); when the threaded collar (23) slides in the hollow fixing rod (27), the limiting ring (271) plays a role in blocking and limiting the annular structure (231).

3. The special tool for high-speed train pantograph maintenance according to claim 1 is characterized in that: The hollow fixing rod (27) is fixedly connected to the lower flexible belt structure (21) through the lower rectangular block (22) with a rectangular groove (221). The upper end of the lower flexible belt structure (21) is inserted into the rectangular groove (221), and the lower flexible belt structure is locked and fixed by a locking bolt (222) passing through the side of the lower rectangular block (22). The threaded rod (24) is connected to the upper flexible belt structure (26) through the same structure as the lower rectangular block (22).

4. The special tool for high-speed train pantograph maintenance according to claim 1 is characterized in that: The hook (11) is a hollow circular closed-loop T-shaped structure.

5. The special tool for high-speed train pantograph maintenance according to claim 1 is characterized in that: It also includes a bow head arm hook heat shrink tube (4), which is sleeved on the bow head arm hook assembly (3).

6. The special tool for high-speed train pantograph maintenance according to claim 1 is characterized in that: The flexible and retractable connection component is a foldable and retractable green ribbon structure.

7. The special tool for repairing pantographs of high-speed trains according to any one of claims 1 to 6, characterized in that: An LED light source (5) is also provided between the J-shaped structural hooks (31).

8. The special tool for repairing pantographs of high-speed trains according to any one of claims 1 to 6, characterized in that: The two J-shaped structural hooks (31) symmetrically arranged side by side are a whole piece of arc surface hook (6).

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