A dowel pin removal tool

Abstract

The utility model discloses a positioning pin dismounting tool belongs to the positioning pin dismounting technical field. Including the screw rod that is equipped with the external screw of both ends, the screw rod one end head is assembled with the fastening nut on the thread, and the screw rod is connected with the screw pull pin pipe on the thread of another end, and the clearance fit assembly of the slide hammer is equipped on the screw rod between the fastening nut and the screw pull pin pipe. The utility model utilizes the screw and the head of positioning pin thread connection, and the upper end of screw pull pin pipe can be connected with screw rod directly, and then utilizes the slide hammer and the baffle impact generation instantaneous impact force and shakes loose the positioning pin of the sliding up. The utility model can remove the positioning pin fast and effectively, especially applicable to the situation that the positioning pin is in the deep groove of fan shell, and the tool can improve the overhaul progress and solve the difficulty.

Description

Technical Field

[0001] This utility model relates to the field of positioning pin disassembly technology, specifically to a positioning pin disassembly tool, particularly a tool for disassembling positioning pins installed on the end face of various large fan speed increasers and reducers. Background Technology

[0002] During the maintenance of the wind turbine, the upper and lower locating pins on the turbine casing were found to be rusted and jammed due to years of disuse. Furthermore, the pins were located within deep grooves in the two semi-circular sections of the casing, limiting the space available for tools. Forcibly removing them could damage the casing or the threads of the locating pins. The usual method for removing such overly tight locating pins, where space is limited, involves using a pry bar after installing the locating pin with a nut. However, this method was impractical due to the lack of space and complex environment. Therefore, we designed a specialized tool for removing locating pins to address this issue. Utility Model Content

[0003] The purpose of this utility model is to provide a tool for removing a positioning pin, which uses a threaded connection between the pin and the head of the positioning pin. The upper end of the threaded pin pull tube can be directly connected to the lead screw. The upward sliding of the sliding hammer and the impact of the baffle generate an instantaneous impact force to loosen the positioning pin, thereby solving the problem mentioned in the background art.

[0004] The technical solution adopted in this utility model is as follows:

[0005] A positioning pin removal tool includes a lead screw 1 with external threads at both ends. A fastening nut 2 is threaded onto one end of the lead screw 1, and a threaded pin puller tube 3 is threaded onto the other end of the lead screw 1. A sliding hammer 4 is fitted on the lead screw 1 with clearance fit between the fastening nut 2 and the threaded pin puller tube 3.

[0006] A stop block 5 is fitted on the lead screw 1 between the sliding hammer 4 and the fastening nut 2 with a clearance fit.

[0007] An anti-collision nut 6 is welded to one end of the threaded pin tube 3 connected to the threaded rod 1, and the anti-collision nut 6 is threaded onto the threaded rod 1.

[0008] The lead screw 1 has a length of 700 mm and an outer diameter of 16 mm.

[0009] The sliding hammer 4 is a frustum structure with a lower base diameter of 50mm and an upper base diameter of 30mm. A through hole with a diameter of 18mm is provided at the axis of the frustum.

[0010] The stop block 5 is a rectangular steel plate with a side length of 50mm.

[0011] The threaded pin tube 3 has a length of 150mm and is fitted with threads inside.

[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0013] This utility model utilizes the threaded connection between the threaded pin and the head of the positioning pin. The upper end of the threaded pin tube can be directly connected to the lead screw. Then, the upward sliding of the sliding hammer and the impact of the baffle generate an instantaneous impact force to loosen the positioning pin.

[0014] This utility model can quickly and effectively remove the positioning pin, and is especially suitable for situations where the positioning pin is located in a deep groove in the fan casing. This tool can improve the maintenance progress and solve difficult problems. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] In the diagram: 1. Lead screw; 2. Fastening nut; 3. Threaded pull pin; 4. Sliding hammer; 5. Stop block; 6. Anti-collision nut. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0018] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0019] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] Example 1

[0021] like Figure 1This embodiment provides a tool for removing a positioning pin, including a lead screw 1 with external threads at both ends. The lead screw 1 is 700mm long and has a diameter of 16mm. A fastening nut 2 is threaded onto one end of the lead screw 1, and a threaded pin-pulling tube 3 is threaded onto the other end of the lead screw 1. A sliding hammer 4 is fitted with a clearance fit on the lead screw 1 between the fastening nut 2 and the threaded pin-pulling tube 3. The sliding hammer 4 has a frustum structure with a lower base diameter of 50mm and an upper base diameter of 30mm. A through hole with a diameter of 18mm is formed at the axis of the frustum. A stop block 5 is fitted with a clearance fit on the lead screw 1 between the sliding hammer 4 and the fastening nut 2. The stop block 5 is a rectangular steel plate with a side length of 50mm and a hole with a diameter of 18mm drilled in the middle.

[0022] The threaded pin tube 3 is 150mm long and has threads inside. An anti-collision nut 6 is welded to one end of the threaded pin tube 3 that connects to the lead screw 1, and the anti-collision nut 6 is threaded onto the lead screw 1.

[0023] In use, the threaded pin-pulling tube 3 is threaded onto the lead screw 1, and the straight end of the threaded pin-pulling tube 3 with its internal threads is installed on the fixing pin. During use, one hand holds the upper end of the tool, while the other hand holds the sliding hammer, striking the baffle upwards to generate instantaneous kinetic energy to pull out the positioning pin. The threaded pin-pulling tube 3 can be replaced according to the size of the positioning pin; welding nuts of different inner diameters allows for disassembly of positioning pins of different sizes. This allows for the disassembly of positioning pins of various specifications, enabling quick and effective removal, especially when the positioning pin is located in a deep groove in the fan housing. This tool can improve maintenance progress and solve difficult problems. This tool is particularly effective for quickly removing positioning pins that are recessed into the fan housing or located in a deep groove in a semi-circular housing.

Claims

1. A tool for removing locating pins, characterized in that, It includes a lead screw (1) with external threads at both ends. A fastening nut (2) is threaded onto one end of the lead screw (1), and a threaded pull pin tube (3) is threaded onto the other end of the lead screw (1). A sliding hammer (4) is fitted on the lead screw (1) between the fastening nut (2) and the threaded pull pin tube (3) with clearance fit.

2. The positioning pin disassembly tool according to claim 1, characterized in that: A stop (5) is fitted on the lead screw (1) between the sliding hammer (4) and the fastening nut (2) with a clearance fit.

3. The positioning pin disassembly tool according to claim 1, characterized in that: The threaded pin tube (3) is connected to the threaded rod (1) with an anti-collision nut (6) welded to one end. The anti-collision nut (6) is threaded onto the threaded rod (1).

4. The positioning pin disassembly tool according to claim 1, characterized in that: The lead screw (1) is 700mm long and has an outer diameter of 16mm.

5. A positioning pin disassembly tool according to claim 4, characterized in that: The sliding hammer (4) is a frustum structure with a bottom diameter of 50mm and an top diameter of 30mm. A through hole with a diameter of 18mm is provided at the axis of the frustum.

6. A positioning pin disassembly tool according to claim 2, characterized in that: The stop block (5) is a rectangular steel plate with a side length of 50mm.

7. A positioning pin disassembly tool according to claim 1, characterized in that: The threaded pin tube (3) is 150 mm long and has threads inside.

Images