Drawing tool for dismounting cooling fan impeller

Abstract

The utility model discloses a drawing tool for dismounting an impeller of a cooling fan, a motor is arranged in the cooling fan, the motor is coaxially connected with the impeller of the fan, a groove is arranged at the end part of the impeller of the fan, the drawing tool comprises a drawing mould in the shape of a cylindrical boss, a drawing hole is arranged at the center of the drawing mould, and the drawing hole is communicated with the groove. The drawing mould is formed by splicing a first drawing part and a second drawing part which are symmetrically arranged, and the protruding end of the drawing mould is matched with a groove of the fan impeller. A pulling plate is arranged in an inner cavity of the drawing mould, a threaded hole is formed in the center of the pulling plate, and the threaded hole and the drawing hole are collinear; a jackscrew is vertically arranged at the center of the plane end of the drawing mould, penetrates through the drawing hole, then is screwed into the threaded hole of the pulling plate and abuts against the end of a motor shaft of the cooling fan. The dynamic balance of the fan impeller is not damaged after disassembly, the normal use of the fan impeller is not influenced, the disassembly process is time-saving and labor-saving, the overall operation time is shortened, the labor intensity is low, the working efficiency is high, the structure is simple, and safety and convenience are realized.

Description

Technical Field

[0001] The utility model relates to the field of disassembly tools, in particular to a pulling tool for dismantling a cooling fan impeller. Background Art

[0002] At present, the main trend of motor technology is to develop in the direction of large capacity and high power density. The main characteristics of large capacity and high power density motors are high electromagnetic load, and the power generated per unit volume is 1.5 times that of ordinary motors. Although it is widely used, the heat generated by the motor increases when it is running at full power load, which can easily cause damage to the motor and shorten its service life. Therefore, the traditional cooling fan installed on the non-load end shaft of the motor for cooling can no longer meet the work needs. Therefore, an additional cooling system needs to be installed to solve the ventilation and heat dissipation problems of high-power large motors. The cooling fan impeller of the cooling system is directly connected to the motor body, so the fan impeller must be removed when the motor is repaired, maintained and replaced. The existing removal method is direct pulling by manpower, but improper pulling force will not only destroy the dynamic balance of the fan impeller, but also cause the equipment to be unable to return to the original working state after maintenance. The vibration value exceeds the standard after installation and cannot work normally. In addition, the pulling process is time-consuming and labor-intensive, requiring multiple people to assist in the operation, with high work intensity and low removal efficiency. Utility Model Content

[0003] The utility model provides a pulling tool for removing a cooling fan impeller, aiming to solve the problem that the impeller is easily damaged when the fan impeller is directly pulled and removed from the motor shaft by manual force, resulting in the destruction of the dynamic balance of the fan impeller, affecting normal use, and the removal process is time-consuming, labor-intensive and inefficient.

[0004] To achieve its purpose, the utility model adopts the following technical solutions:

[0005] A pulling tool for removing a cooling fan impeller, wherein a motor is provided inside the cooling fan, the motor is coaxially connected to the fan impeller, a groove is provided at the end of the fan impeller, and the pulling tool comprises a pulling jig in the shape of a cylindrical boss, a pulling hole is provided at the center of the pulling jig; the pulling jig is formed by splicing a first pulling portion and a second pulling portion symmetrically arranged, and the raised end of the pulling jig is adapted to the groove of the fan impeller; a pulling plate is provided in the inner cavity of the pulling jig, a threaded hole is provided at the center of the pulling plate, and the threaded hole and the pulling hole are colinear; a top screw is vertically provided at the center of the flat end of the pulling jig, and the top screw passes through the pulling hole and is screwed into the threaded hole of the pulling plate and abuts against the end of the motor shaft of the cooling fan.

[0006] Furthermore, fastening nuts are symmetrically arranged at the joint of the first pulling part and the second pulling part, and the first pulling part and the second pulling part are fastened by inserting a locking bolt through the fastening nut.

[0007] Further, the pulling plate is arranged close to the protruding end of the drawing jig.

[0008] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0009] The pulling tool for removing the cooling fan impeller provided by the utility model is to first install the pulling jig on the cooling fan motor shaft that needs to be removed, then insert the raised end of the pulling jig into the groove at the end of the fan impeller, and smoothly pull the fan impeller out from the motor shaft by rotating the top screw to complete the removal, which solves the problem that the dynamic balance of the fan impeller is easily destroyed when the fan impeller is removed from the motor shaft by manual pulling, resulting in the inability to restore the equipment to its original working state after maintenance. The dynamic balance of the fan impeller will not be destroyed after disassembly and assembly by the tool, and the normal use of the fan impeller will not be affected. In addition, the removal process saves time and labor, shortens the overall operation time, has low labor intensity, high work efficiency, ingenious design, simple structure, safety and convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a front view of the pulling tool of the utility model;

[0011] Figure 2 It is a top view of the pulling tool of the utility model;

[0012] Figure 3 It is a left view of the pulling tool of the utility model;

[0013] In the figure: 1-pulling jig; 2-locking bolt; 3-top screw; 4-pulling plate; 5-fastening nut; 6-pulling hole. DETAILED DESCRIPTION

[0014] The utility model is further described below in conjunction with the accompanying drawings:

[0015] like Figure 1-3 As shown, the utility model is a pulling tool for removing a cooling fan impeller, wherein a motor is provided inside the cooling fan, the motor is coaxially connected to the fan impeller, a groove is provided at the end of the fan impeller, and the pulling tool comprises a pulling jig 1 in the shape of a cylindrical boss, and a pulling hole 6 is provided at the center of the pulling jig 1. The pulling jig 1 is formed by splicing a symmetrically arranged first pulling part and a second pulling part, and specifically, four fastening nuts 5 are symmetrically provided at the splicing of the first pulling part and the second pulling part, and the first pulling part and the second pulling part are fastened by inserting a locking bolt 2 into the fastening nut 5. The raised end of the drawing jig 1 is matched with the groove of the fan impeller. When in use, the raised end of the drawing jig 1 is inserted into the groove at the end of the fan impeller; a pulling plate 4 is provided in the inner cavity of the drawing jig 1 near the raised end, and a threaded hole is provided at the center of the pulling plate 4, and the threaded hole is colinear with the drawing hole 6; a top screw 3 is vertically provided at the center of the plane end of the drawing jig 1, and the top screw 3 passes through the drawing hole 6 and is screwed into the threaded hole of the pulling plate 4 and abuts against the end of the motor shaft of the cooling fan.

[0016] When removing the cooling fan impeller, first remove the locking bolts 2 on the outside of the first drawing part and the second drawing part of the drawing jig 1, decompose the drawing jig 1 into two parts, and then install the first drawing part and the second drawing part on the cooling fan motor shaft that needs to be removed, and insert the raised end of the drawing jig 1 into the groove at the end of the fan impeller, so that the drawing jig 1 and the fan impeller are combined into a whole, and then insert the locking bolt 2 into the fastening nut 5 on the outside of the first drawing part and the second drawing part to tighten the first drawing part and the second drawing part, finally insert the top screw 3 into the drawing hole 6 of the drawing jig 1 and then screw it into the threaded hole of the pulling plate 4, so that the end of the top screw 3 is pushed against the end of the motor shaft of the cooling fan, and the fan impeller is smoothly pulled out from the motor shaft by rotating the top screw 3 to complete the removal.

Claims

1. A pulling tool for removing a cooling fan impeller, wherein a motor is provided in the cooling fan, the motor is coaxially connected to the fan impeller, and a groove is provided at the end of the fan impeller, characterized in that: The pulling tool comprises a pulling jig (1) in the shape of a cylindrical boss, wherein a pulling hole (6) is provided at the center of the pulling jig (1); the pulling jig (1) is formed by splicing a first pulling portion and a second pulling portion which are symmetrically arranged, and the protruding end of the pulling jig (1) is matched with the groove of the fan impeller; a pulling plate (4) is provided in the inner cavity of the pulling jig (1), wherein a threaded hole is provided at the center of the pulling plate (4), and the threaded hole and the pulling hole (6) are colinear; a top screw (3) is vertically provided at the center of the plane end of the pulling jig (1), and the top screw (3) passes through the pulling hole (6) and is screwed into the threaded hole of the pulling plate (4) and abuts against the end of the motor shaft of the cooling fan.

2. A pulling tool for removing a cooling fan impeller according to claim 1, characterized in that: A fastening nut (5) is symmetrically provided at the joint between the first drawing portion and the second drawing portion, and the first drawing portion and the second drawing portion are fastened by inserting a locking bolt (2) into the fastening nut (5).

3. A pulling tool for removing a cooling fan impeller according to claim 1 or 2, characterized in that: The pulling plate (4) is arranged close to the raised end of the pulling jig (1).

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