End cap for electric motor

Abstract

An end cover of an electric motor comprises an outer stopper (2) arranged on an inner end surface of the end cover (1), the outer stopper being close to an outer edge of the end cover, ears (5) symmetrically extending radially on the outer edge of the end cover, through holes (3) being arranged on the ears, the inner diameter of the through holes being larger than the outer diameter of fastening bolts (6), the fastening bolts being able to be screwed on a motor casing through the through holes, characterized in that the through holes are provided with internal threads (4). When the end cover is disassembled, the fastening bolts are first removed, then suitable jacking bolts are screwed into the internal threads of the ears respectively, the jacking bolts abutting against the motor casing, and the end cover is separated from the motor casing by rotating the jacking bolts evenly. The beneficial effect is that the internal threads arranged on the ears of the end cover can facilitate the disassembly of the end cover, and the joint surface or the stopper of the end cover or the motor casing will not be damaged during the disassembly of the end cover.

Description

Technical Field

[0001] This utility model relates to an end cover for an electric motor. Background Technology

[0002] The motor housing is connected to two end caps respectively. The outer stop of the end cap is inserted into the inner stop of the housing. The outer edge of the end cap is provided with a lug, and the lug is provided with a through hole. The bolt passes through the through hole and is screwed onto the lug of the housing. The end cap is used to support the motor shaft. In order to improve the support strength, the outer stop of the end cap and the inner stop of the housing are interference fit.

[0003] When the motor malfunctions and needs repair, the end cover needs to be removed. Since the outer stop of the end cover and the inner stop of the housing are interference fit, a pry bar or screwdriver is usually used to pry the end cover out of the housing by inserting it into the seam between the housing and the end cover. The disadvantage of this method is that the prying force is not easy to control and it is easy to damage the seam or stop of the two. Utility Model Content

[0004] To address the aforementioned problems, this utility model designs an end cover for an electric motor that allows for easy removal of the end cover without damaging the end cover or the motor housing.

[0005] The technical solution of this utility model is an end cover for an electric motor, which includes an outer stop 2 disposed on the inner end face of the end cover 1. The outer stop is close to the outer edge of the end cover. A lug 5 extends radially symmetrically on the outer edge of the end cover. The lug is provided with a through hole 3. The inner diameter of the through hole is larger than the outer diameter of the fastening bolt 6. The fastening bolt can pass through the through hole and be screwed onto the motor housing. The feature is that the through hole is provided with an internal thread 4.

[0006] When removing the end cover, first remove the fastening bolts, then screw in the appropriate abutment bolts into the internal threads of the ear body. The abutment bolts press against the housing, and rotate each abutment bolt evenly to separate the end cover from the housing.

[0007] Its beneficial effect is that the internal thread on the end cover's ear body allows for easy removal of the end cover without damaging the joint surface or stop of the end cover or housing during the removal process. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the structure of this utility model.

[0009] Figure 2 for Figure 1 The left view.

[0010] Figure 3 This is a schematic diagram showing the connection between the end cap and the housing.

[0011] Figure 4 This is a schematic diagram for removing the end cap.

[0012] Attached diagram symbols: 1-End cap, 2-Outer stop, 3-Through hole, 4-Internal thread, 5-Ear, 6-Fasting bolt, 7-Housing, 8-Inner stop, 9-Top bolt. Detailed Implementation

[0013] An end cover for an electric motor has an outer stop 2 on the inner end face of the end cover 1, the outer stop being close to the outer edge of the end cover. A plurality of ears 5 extend radially symmetrically on the outer edge of the end cover, and the ears are provided with through holes 3. The inner diameter of the through holes is larger than the outer diameter of the fastening bolts 6, and the fastening bolts can pass through the through holes and be screwed onto the housing 7 of the electric motor. The characteristic feature is that the through holes are provided with internal threads 4.

[0014] The end cap is connected to the housing as follows Figure 3 As shown, the outer stop 2 of the end cap is inserted into the inner stop 8 of the housing 7, and the fastening bolt 6 passes through the through hole 3 and is screwed into the ear of the housing.

[0015] When removing the end cap, Figure 4 As shown, first remove the fastening bolts, then screw in the appropriate abutment bolts 9 into the internal threads of the ear body. The abutment bolts press against the housing. Rotate each abutment bolt evenly to separate the end cover from the housing. The rotation displacement of the abutment bolts can be finely controlled, the end cover is subjected to uniform force, and there is no damage to the end cover or the housing.

[0016] The abutment bolt 9, which mates with the internal thread, has a nominal diameter one grade higher than that of the fastening bolt 6. For example, if the nominal diameter of the fastening bolt is 8 (M8), then the nominal diameter of the abutment bolt 9 is 10 (M10); if the nominal diameter of the fastening bolt is 10 (M10), then the nominal diameter of the abutment bolt 9 is 12 (M12), and so on. The abutment bolt is a standard part and is readily available.

Claims

1. An end cover for an electric motor, comprising an outer stop (2) disposed on the inner end face of the end cover (1), the outer stop being close to the outer edge of the end cover, and a lug (5) extending radially symmetrically on the outer edge of the end cover, the lug being provided with a through hole (3), the inner diameter of the through hole being larger than the outer diameter of the fastening bolt (6), the fastening bolt being able to pass through the through hole and be screwed onto the motor housing, characterized in that, The through hole is provided with an internal thread (4).

2. The end cover of the electric motor according to claim 1, characterized in that, The nominal diameter of the abutment bolt (9) that mates with the internal thread is one grade higher than that of the fastening bolt (6).

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