Pin puller for brake shoe pin of metro vehicle

Abstract

The utility model relates to a metro vehicle brake shoe pin puller which solves the problems that a hook of an existing pin puller on the market cannot hook a brake shoe pin, and the pulling-out force is small. Comprising a hook (1), a hook rod (2), a metal sliding block (3), a metal supporting gasket (4) and a fixing nut (5), the hook (1) and the hook rod (2) are of an integrated structure, the metal sliding block (3) and the metal supporting gasket (4) are arranged on the hook rod (2) in a sliding and sleeving mode, the bottom end of the hook rod (2) is connected with a screw rod, the fixing nut (5) is connected to the screw rod in a threaded mode, and the metal supporting gasket (4) is adjacent to the fixing nut (5). The device can be used in the maintenance operation of replacing the brake shoe, the risk that a brake shoe bolt or a tool is damaged due to the fact that a common tool is used for dismantling is reduced, staff work is facilitated, and meanwhile the work intensity is relieved; the working efficiency is improved, the equipment safety is guaranteed, and the standard requirements are completely met.

Description

Technical Field

[0001] The utility model belongs to the field of railway track industry, and in particular relates to a brake shoe pin puller for a subway vehicle. Background Art

[0002] During routine inspections and repairs of railway vehicles, it is necessary to check the wear of the brake shoes. The thickness must be greater than the specified value (the wear mark on the brake shoe groove can be used to determine whether the brake shoe needs to be replaced). Otherwise, the brake shoe needs to be replaced. To replace the brake shoe, the old brake shoe must be removed first and then replaced with a new one. There is a brake shoe latch at the rear of the brake shoe to secure the brake shoe. Therefore, during the disassembly process, the brake shoe latch must be removed before the brake shoe can be replaced. When the brake shoe latch needs to be removed during the brake shoe replacement process, it is generally done manually with a screwdriver or a steel rod. During the work process, a large number of brake shoe pins often fit tightly into the pin holes, making them very difficult to pull out. Excessive force can cause the brake shoe pins to deform or damage the tool, increasing work time and maintenance costs. This seriously affects work efficiency. Currently, the existing pin pullers on the market have problems such as the hook being unable to hook the brake shoe pin and the low extraction force. Utility Model Content

[0003] The utility model provides a brake shoe pin puller for subway vehicles, thereby solving the problems of existing pin pullers on the market that the hook cannot hook the brake shoe pin and the pulling force is small.

[0004] The utility model is realized by the following technical solutions:

[0005] A brake shoe pin puller for a subway vehicle comprises a hook 1, a hook rod 2, a metal slider 3, a metal support washer 4 and a fixing nut 5. The hook 1 and the hook rod 2 are an integral structure. The metal slider 3 and the metal support washer 4 can be slidably mounted on the hook rod 2. A screw is connected to the bottom end of the hook rod 2. The fixing nut 5 is threadedly connected to the screw. The metal support washer 4 is adjacent to the fixing nut 5.

[0006] The structure of the hook 1 matches the size of the tail hole of the brake shoe pin of the subway electric passenger car.

[0007] The hook 1 and the hook rod 2 have a diameter of 10 mm and are made of steel.

[0008] The metal support washer 4 is made of high-strength steel.

[0009] Beneficial effects of the utility model:

[0010] The utility model can be used during the maintenance operation of "replacing brake shoes", reducing the risk of damage to the brake shoe pins or tools caused by using general tools for removal, facilitating employees' operations while also reducing work intensity; improving work efficiency, ensuring equipment safety, and fully meeting regulatory requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic structural diagram of the utility model. DETAILED DESCRIPTION

[0012] like Figure 1 As shown, the pin puller of the present invention is composed of a hook 1, a hook rod 2, a metal slider 3, a metal support washer 4 and a fixing nut 5.

[0013] 1. Hook and hook rod

[0014] The hook and hook rod are integrated into one structure, connected to the rear end of the brake shoe latch through the hook. Considering the large size of the brake shoe latch, which requires considerable force to remove, the hook and hook rod are 10mm in diameter and constructed of steel to ensure sufficient strength. The rear end of the rod is threaded for easy nut installation.

[0015] 2. Metal slider and support gasket

[0016] The metal slider is hollow in the middle, with a diameter and length suitable for human grip. The inner diameter is larger than the hook rod diameter to facilitate its movement along the hook rod. During use, the metal slider strikes the support pad, applying a counterforce to the latch. The metal support pad must be made of high-strength steel to withstand high-intensity impacts.

[0017] 3. Fixing nut

[0018] The fixing nut is installed at the tail end of the hook rod to provide support and transmit the impact force to the hook rod.

[0019] The hook structure of the utility model matches the size of the tail hole of the brake shoe pin of a subway electric passenger car, which makes it easy to connect the hook with the tail hole of the brake shoe pin. It is used in a narrow space under the car. When in use, the metal slider device slides and hits the metal support gasket, and the reverse force is transmitted to the brake shoe pin through the fixing nut, and then the brake shoe pin is pulled out, so as to reduce work intensity and workload.

Claims

1. A brake shoe pin puller for subway vehicles, characterized by: The invention comprises a hook (1), a hook rod (2), a metal slider (3), a metal support washer (4) and a fixing nut (5); the hook (1) and the hook rod (2) are an integrated structure; the metal slider (3) and the metal support washer (4) can be slidably mounted on the hook rod (2); a screw rod is connected to the bottom end of the hook rod (2); the fixing nut (5) is threadedly connected to the screw rod; and the metal support washer (4) is adjacent to the fixing nut (5).

2. The subway vehicle brake shoe pin puller according to claim 1, characterized in that: The hook (1) structure matches the size of the tail hole of the brake shoe pin of a subway electric passenger car.

3. The subway vehicle brake shoe pin puller according to claim 1, characterized in that: The hook (1) and the hook rod (2) have a diameter of 10 mm and are made of steel.

4. The subway vehicle brake shoe pin puller according to claim 1, characterized in that: The metal support gasket (4) is made of high-strength steel.

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