Special puller for replacing small motor bearing

Abstract

The utility model discloses a special puller for replacing a small motor bearing, which comprises a support, a bolt hole is arranged at the center of the upper portion of the support, a bolt is arranged in the bolt hole, and a U-shaped clamping groove is arranged at the bottom of the support. The special puller for replacing the bearing of the small-sized motor is small in occupied space, safer to operate and capable of effectively protecting an outgoing line of a motor rotor.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical disassembly, and in particular relates to a special puller for replacing bearings of small motors. Background Art

[0002] At present, frequency converters are widely used in hot rolling or cold rolling production lines. The cooling fan motor of the frequency converter will make abnormal noises due to long-term operation and needs to be replaced. When replacing the motor bearings, it is usually necessary to use a puller to disassemble them.

[0003] Because the claw heads of traditional pullers are generally large and thick, while the bearing chamber space of small motors is small, the claw heads of traditional pullers are easily unable to fit into the gap of the bearing chamber. In addition, there are lead wires in the rotor shafts of some special small motors. When the traditional puller is disassembled, the lead wires will be damaged. At the same time, the claws of traditional pullers are easy to slip when pulling the small motor bearings, causing personal injury. Utility Model Content

[0004] Technical problems solved: In response to the above technical problems, the utility model provides a special puller for replacing small motor bearings, which occupies a small space, is safer to operate, and can effectively protect the lead wires of the motor rotor.

[0005] Technical solution: A special puller for replacing small motor bearings, including a bracket, a bolt hole is opened at the center of the upper part of the bracket, a bolt is arranged in the bolt hole, and a U-shaped groove is provided at the bottom of the bracket.

[0006] Preferably, the bracket and the U-shaped slot are integrally formed.

[0007] Preferably, the puller further comprises a protective tube, and a threading hole is provided on the side wall of the protective tube.

[0008] Furthermore, the protection tube is arranged between the bolt and the motor shaft.

[0009] Furthermore, the lead wire of the motor rotor passes through one end of the protective tube and comes out from the wire threading hole.

[0010] Beneficial effects: The utility model is a special puller for replacing small motor bearings, which takes up little space and is safer to operate. Compared with traditional pullers, it is simple to operate and easy to carry. The integrity of the disassembled bearings can be guaranteed, and the lead wires of the motor rotor can be effectively protected. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a structural diagram of a special puller for replacing small motor bearings in the utility model;

[0012] Figure 2 This is a schematic structural diagram of the U-shaped slot of the utility model;

[0013] Serial numbers in the figure: 1, bolt, 2, bolt hole, 3, bracket, 4, wire tube, 5, wire hole, 6, U-shaped slot. DETAILED DESCRIPTION

[0014] The technical solution of the present utility model is further described in detail below with reference to the accompanying drawings. Example 1

[0015] Reference Figure 1-Figure 2 A special puller for replacing small motor bearings includes a bracket 3, a bolt hole 2 is opened at the center of the upper part of the bracket 3, a bolt 1 is arranged in the bolt hole 2, and a U-shaped slot 6 is provided at the bottom of the bracket 3.

[0016] The bracket 3 and the U-shaped slot 6 are integrally formed.

[0017] The bottom side of the U-shaped slot 6 is 65 mm long, the side side is 102 mm long, and the distance between the two sides is 25 mm.

[0018] When in use, screw the bolt 1 to the highest point of the bracket 3, then insert the motor rotor shaft and the bearing into the groove of the U-shaped slot 6, and screw the bolt 1 to remove the bearing. Example 2

[0019] A special puller for replacing small motor bearings includes a bracket 3, a bolt hole 2 is provided at the upper center of the bracket 3, a bolt 1 is provided in the bolt hole 2, a U-shaped slot 6 is provided at the bottom of the bracket 3, and the puller also includes a protective tube 4, a wire threading hole 5 is provided on the side wall of the protective tube 4, the protective tube 4 is arranged between the bolt 1 and the motor shaft, and the lead wire of the motor rotor is inserted from one end of the protective tube 4 and exits from the wire threading hole 5.

[0020] When in use, screw the bolt 1 to the highest point of the bracket 3, then insert the motor rotor shaft and the bearing into the groove of the U-shaped slot 6, pass the lead wire of the motor rotor into the tube of the protective tube 4, and then pass it out from the threading hole 5, and screw the bolt 1 to remove the bearing.

[0021] The embodiments of this specific implementation method are all preferred embodiments of the present utility model, and are not intended to limit the scope of protection of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the scope of protection of the present utility model.

Claims

1. A special puller for replacing small motor bearings, characterized by: The bracket (3) comprises a bolt hole (2) at the center of the upper portion of the bracket (3), a bolt (1) is arranged in the bolt hole (2), and a U-shaped slot (6) is provided at the bottom of the bracket (3).

2. The special puller for replacing small motor bearings according to claim 1, characterized in that: The bracket (3) and the U-shaped slot (6) are integrally formed.

3. The special puller for replacing small motor bearings according to claim 1, characterized in that: It also includes a protective tube (4), and a threading hole (5) is provided on the side wall of the protective tube (4).

4. The special puller for replacing small motor bearings according to claim 3, characterized in that: The protective tube (4) is arranged between the bolt (1) and the motor shaft.

5. The special puller for replacing small motor bearings according to claim 3, characterized in that: The lead wire of the motor rotor passes through one end of the protection tube (4) and passes through the wire hole (5).

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