Improved shaft withdrawing tool for motor

Abstract

The utility model discloses an improved shaft withdrawing tool for a motor, which comprises a positioning unit, a shaft withdrawing unit and a lifting driving structure used for driving the shaft withdrawing unit to lift relative to the positioning unit, the positioning unit is provided with a positioning seat, a positioning surface is formed at the top of the positioning seat, and a positioning hole is formed in the center of the positioning surface. A shaft taking cavity is formed in the positioning seat; the shaft withdrawing unit is provided with a mounting seat, a cold stamping rod and a protective jacket; the cold stamping rod and the positioning hole are vertically opposite and fixedly arranged on the mounting seat, a rod head and a rod body are formed on the cold stamping rod, the rod body is sleeved with a spring piece and a protective jacket, the spring piece provides driving force, and the protective jacket elastically protects the rod body. The durability of the cold stamping rod can be improved.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to an improved motor shaft retraction tool. Background Technology

[0002] During motor assembly, after the bearings and rotor are installed onto the shaft, if defects are found during later inspection, the motor needs to be disassembled and reassembled. Current motor disassembly primarily involves cold stamping to remove the shaft from the rotor and bearings. However, in existing cold stamping structures, the stamping rods lack protective structures and are prone to breakage. Utility Model Content

[0003] The purpose of this invention is to provide an improved shaft retraction tool for motors.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] An improved motor shaft removal tooling includes a positioning unit, a shaft removal unit disposed vertically opposite to the positioning unit, and a lifting drive structure for driving the shaft removal unit to move up and down relative to the positioning unit. The positioning unit is provided with a positioning seat, the positioning seat having a positioning surface formed on its top for placing the shaft assembly to be removed and a positioning hole for the shaft of the shaft assembly to be removed to pass through at the center of the positioning surface, and the positioning seat having a shaft taking cavity communicating with the positioning hole.

[0006] The retraction unit includes a mounting base, a cold-stamped rod, and a protective sleeve. The mounting base has a vertical cavity, a limiting cavity communicating with the vertical cavity at its top, and a through hole communicating with the vertical cavity at its bottom. The cold-stamped rod is fixed to the mounting base with the positioning hole facing each other vertically. It has a rod head fixed in the limiting cavity and a rod body that passes through the vertical cavity and the through hole and then protrudes outward. A spring and the protective sleeve are sleeved on a section of the rod body located in the vertical cavity. The two ends of the spring abut against one end of the rod head and one end of the protective sleeve, respectively. The spring provides a driving force to push the other end of the protective sleeve outward through the through hole, so that the other end of the protective sleeve provides elastic protection for the end of the rod body that protrudes outward.

[0007] As a further technical solution of this utility model: the positioning seat has a cavity opening for taking the shaft on its outer side.

[0008] As a further technical solution of this utility model: the diameter of the limiting cavity is larger than the diameter of the vertical cavity, and the diameter of the vertical cavity is larger than the diameter of the opening; the protective jacket located inside the vertical cavity has an abutment edge along its outer edge that matches the diameter of the vertical cavity.

[0009] As a further technical solution of this utility model: the rod head is fixed in the limiting cavity by interference fit with the limiting cavity; the outer diameter of the protective sleeve matches the diameter of the through hole, so that the protective sleeve can move up and down relative to the through hole along the rod body.

[0010] As a further technical solution of this utility model: the positioning unit is provided with a base, and the base is provided with two sets of guide components connected to the retraction unit on both sides, and the positioning seat is provided in the middle of its top surface.

[0011] As a further technical solution of this utility model: the retraction unit is provided with a lifting seat, the lifting seat is connected to the guide component on both sides, the mounting seat is provided on the bottom surface of the middle part of the lifting seat, and the top surface of the middle part is connected to the drive rod of the lifting drive structure.

[0012] As a further technical solution of this utility model: the lifting drive structure includes a fixed frame mounted above the positioning unit and the retraction unit, and a lifting drive cylinder mounted on the fixed frame, wherein the drive rod of the lifting drive cylinder is connected to the lifting seat.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model proposes an improved motor shaft retraction tool. Through the cooperation between the positioning unit, the shaft retraction unit and the lifting drive structure, it can effectively retract the shaft of the shaft to be retracted assembly. During the shaft retraction process, a spring element provides a driving force to push the other end of the protective sleeve outward from the through hole, so that the protective sleeve maintains elastic protection for the rod body, absorbs the relative force acting on the rod body, reduces the stress on the rod body, and effectively improves the durability of the cold stamping rod. Attached Figure Description

[0014] Figure 1 A schematic diagram of an improved motor shaft retraction tool.

[0015] Figure 2 This is a three-dimensional view of the positioning unit and the retraction unit.

[0016] Figure 3 This is a cross-sectional view of the positioning unit and the retraction unit. Detailed Implementation

[0017] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of protection of this utility model.

[0018] Please see Figure 1 , Figure 2 and Figure 3An improved motor shaft removal tooling includes a positioning unit 10, a shaft removal unit 20 disposed vertically opposite to the positioning unit 10, and a lifting drive structure 30 for driving the shaft removal unit 20 to move up and down relative to the positioning unit 10. The positioning unit 10 is provided with a positioning seat 11. The positioning seat 11 has a positioning surface 111 on its top for placing the shaft assembly to be removed and a positioning hole 112 for the shaft of the shaft assembly to be removed to pass through in the center of the positioning surface 111. The positioning seat 11 has a shaft taking cavity 113 communicating with the positioning hole 112 and an opening of the shaft taking cavity 113 formed on its outer side.

[0019] The retraction unit 20 is provided with a mounting base 21, a cold-stamped rod 22, and a protective sleeve 23. The mounting base 21 has a vertical cavity 211 formed therein, a limiting cavity 212 communicating with the vertical cavity 211 at its top, and a through hole 213 communicating with the vertical cavity 211 at its bottom. The cold-stamped rod 22 is fixedly mounted on the mounting base 21 with the positioning hole 112 facing each other vertically. It has a rod head 221 fixed in the limiting cavity 212 and a rod body 222 that passes through the vertical cavity 211 and the through hole 213 and then protrudes to the outside. A spring member 24 and the protective sleeve 23 are sleeved on a section of the rod body 222 located in the vertical cavity 211. The two ends of the spring member 24 respectively abut against one end of the rod head 221 and one end of the protective sleeve 23. The spring member 24 provides a driving force to push the other end of the protective sleeve 23 out through the through hole 213, so that the other end of the protective sleeve 23 provides elastic protection for the end of the rod body 222 that protrudes to the outside.

[0020] Furthermore, in this embodiment, the positioning unit 10 is provided with a base 12, and the base 12 is provided with two sets of guide components 13 connected to the retraction unit 20 on its two sides, and the positioning seat 11 is provided in the middle of its top surface. When the lifting drive structure 30 drives the retraction unit 20 to lift relative to the positioning unit 10, the guide components 13 play a guiding role to improve the stability during lifting.

[0021] Furthermore, in this embodiment, the retraction unit 20 is provided with a lifting seat 24, which is connected to the guide assembly 13 on both sides. The lifting seat 24 has the mounting seat 21 on its bottom surface in the middle and is connected to the drive rod of the lifting drive structure 30 on its top surface in the middle.

[0022] Furthermore, in this embodiment, the lifting drive structure 30 includes a fixed frame 31 mounted above the positioning unit 10 and the retraction unit 20, and a lifting drive cylinder 32 mounted on the fixed frame 31. The drive rod of the lifting drive cylinder 32 is connected to the lifting seat 24, so that the drive rod of the lifting drive cylinder 32 can extend and retract, thereby driving the retraction unit 20 to rise and fall relative to the positioning unit 10.

[0023] Furthermore, in this embodiment, the diameter of the limiting cavity 212 is larger than the diameter of the vertical cavity 211, and the diameter of the vertical cavity 211 is larger than the diameter of the through hole 213; the rod head 221 is fixed in the limiting cavity 212 by interference fit with the limiting cavity 212; the outer diameter of the protective sleeve 23 matches the diameter of the through hole 213, so that the protective sleeve 23 can move up and down relative to the through hole 213 along the rod body 222.

[0024] Furthermore, in this embodiment, the protective cover 23 located inside the vertical cavity 211 has an abutment 231 along its outer edge that matches the diameter of the vertical cavity 211, in order to prevent the protective cover 23 from coming off.

[0025] Furthermore, in this embodiment, the positioning seat 11 has a lower connecting edge 101 at its bottom for screwing with the base 12, and the mounting seat 21 has an upper connecting edge 201 at its top for screwing with the lifting seat 24.

[0026] Understandably, the improved motor shaft retraction fixture of this utility model is used as follows: The shaft assembly to be retracted is placed on the positioning surface 111 of the positioning seat 11, and the shaft of the shaft assembly to be retracted passes through the positioning hole 112 with its bottom. Then, the lifting drive structure 30 is activated, and the lifting drive structure 30 drives the shaft retraction unit 20 to descend relative to the positioning unit 10. The shaft retraction unit 20 uses the rod body 222 of its cold-stamped rod 22 to hold the top of the shaft of the shaft assembly. As the shaft retraction unit 20 descends, the shaft is retracted, and the retracted shaft falls into the shaft taking cavity 113 of the positioning seat 11. At the same time, during the shaft retraction process, under the driving force provided by the spring member 24 to push the other end of the protective sleeve 23 outward from the through hole 213, the protective sleeve 23 maintains elastic protection for the rod body 222, which can absorb the relative force acting on the rod body 222, reduce the stress on the rod body 222, and effectively improve the durability of the cold-stamped rod 22.

[0027] In summary, the improved motor shaft retraction fixture of this utility model, through the cooperation between the positioning unit 10, the shaft retraction unit 20, and the lifting drive structure 30, can effectively retract the shaft of the shaft to be retracted assembly. During the shaft retraction process, the spring member 24 provides a driving force to push the other end of the protective sleeve 23 out through the through hole 213, so that the protective sleeve 23 maintains elastic protection for the rod body 222, absorbs the relative force acting on the rod body 222, reduces the stress on the rod body 222, and effectively improves the durability of the cold stamping rod 22.

[0028] Any combination of different embodiments of this utility model, provided it does not violate the inventive concept of this utility model, shall be considered as the disclosure of this utility model; any simple modifications to the technical solution and any combination of different embodiments within the scope of the inventive concept of this utility model, without violating the inventive concept of this utility model, shall be within the protection scope of this utility model.

Claims

1. An improved shaft retraction tool for an electric motor, characterized in that: The device includes a positioning unit (10), a shaft retraction unit (20) arranged vertically opposite to the positioning unit (10), and a lifting drive structure (30) for driving the shaft retraction unit (20) to move up and down relative to the positioning unit (10). The positioning unit (10) is provided with a positioning seat (11). The positioning seat (11) has a positioning surface (111) on its top for placing the shaft assembly to be retracted and a positioning hole (112) in the center of the positioning surface (111) for the shaft of the shaft assembly to be retracted to pass through. The positioning seat (11) has a shaft taking cavity (113) communicating with the positioning hole (112) inside it. The retraction unit (20) is provided with a mounting base (21), a cold-stamped rod (22), and a protective sleeve (23). The mounting base (21) has a vertical cavity (211) formed therein, a limiting cavity (212) communicating with the vertical cavity (211) at its top, and a through hole (213) communicating with the vertical cavity (211) at its bottom. The cold-stamped rod (22) is fixedly mounted on the mounting base (21) with the positioning hole (112) facing each other vertically. It has a rod head (221) fixed in the limiting cavity (212) and a rod that passes through the vertical cavity (213) in sequence. 211) The rod body (222) extends outward from the through hole (213). A section of the rod body (222) located in the vertical cavity (211) is fitted with a spring element (24) and the protective sleeve (23). The two ends of the spring element (24) respectively abut against one end of the rod head (221) and one end of the protective sleeve (23). The spring element (24) provides a driving force to extend the other end of the protective sleeve (23) outward from the through hole (213), so that the other end of the protective sleeve (23) provides elastic protection for the end of the rod body (222) extending outward.

2. The improved motor shaft retraction tooling according to claim 1, characterized in that: The positioning seat (11) has a cavity opening for a shaft taking cavity (113) formed on its outer side.

3. The improved motor shaft retraction tooling according to claim 1, characterized in that: The diameter of the limiting cavity (212) is larger than the diameter of the vertical cavity (211), and the diameter of the vertical cavity (211) is larger than the diameter of the opening (213); the protective outer sleeve (23) located inside the vertical cavity (211) has an abutment (231) along its outer edge that matches the diameter of the vertical cavity (211).

4. The improved motor shaft retraction tooling according to claim 3, characterized in that: The rod head (221) is fixed in the limiting cavity (212) by interference fit with the limiting cavity (212); the outer diameter of the protective sleeve (23) matches the diameter of the through hole (213), so that the protective sleeve (23) can move up and down relative to the through hole (213) along the rod body (222).

5. The improved motor shaft retraction tooling according to claim 1, characterized in that: The positioning unit (10) is provided with a base (12), and the base (12) has two sets of guide components (13) connected to the retraction unit (20) on its two sides, and the positioning seat (11) is provided in the middle of its top surface.

6. The improved motor shaft retraction tooling according to claim 5, characterized in that: The retraction unit (20) is provided with a lifting seat (24), which is connected to the guide assembly (13) on both sides. The lifting seat (24) has the mounting seat (21) on its bottom surface in the middle and is connected to the drive rod of the lifting drive structure (30) on its top surface in the middle.

7. The improved motor shaft retraction tooling according to claim 6, characterized in that: The lifting drive structure (30) includes a fixed frame (31) mounted above the positioning unit (10) and the retraction unit (20) and a lifting drive cylinder (32) mounted on the fixed frame (31). The drive rod of the lifting drive cylinder (32) is connected to the lifting seat (24).

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