Connection structure of motor housing and end cover

Abstract

The application relates to a connecting structure of a motor shell and an end cover, which comprises a motor shell (5), end covers (10) arranged at both ends of the motor shell, a plurality of first lugs (6) symmetrically arranged on the outer circle of both ends of the motor shell, a plurality of second lugs (7) symmetrically arranged on the outer circle of the end cover (10), through holes (12) arranged on the second lugs, and bolts (3) screwed on the first inner threads of the first lugs through the through holes; the circumferential length of the first lugs and the second lugs is greater than the diameter of the bolts, the second lugs are provided with second inner threads (11), and the second inner threads and the through holes are spaced apart along the circumference. The beneficial effect is that the end cover can be separated from the motor shell by screwing the bolts on the second inner threads of the end cover one by one after the bolts are unscrewed from the motor shell, the front ends of the bolts abutting against the first lugs, and the bolts being screwed on the second inner threads of the end cover. The end cover can be conveniently disassembled, and the motor shell and the end cover are not damaged during the disassembly process.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of connection structure of motor casing and end cover. BACKGROUND

[0002] The both ends of the motor casing are connected with end cover respectively, and the end cover is used to support the rotating shaft of rotor. In order to improve the supporting strength, the inner circle of the end cover is in interference fit with the inner circle of the motor casing, and the end face of the end cover is in contact with the end face of the motor casing. When maintaining or repairing the motor, the end cover needs to be disassembled. The method of disassembly is to insert a screwdriver into the gap between the end face of the end cover and the end face of the motor casing, and to move the end cover to separate it from the motor casing. This method is easy to damage the contact surface of the end cover and the motor casing, and it is time-consuming and laborious. SUMMARY

[0003] In view of the deficiencies of the prior art, the utility model provides a kind of connection structure of motor casing and end cover, which facilitates the disassembly of end cover and does not damage the end cover during disassembly.

[0004] The technical scheme of the utility model is a kind of connection structure of motor casing and end cover, which includes a motor casing 5, and the both ends of the motor casing are provided with end cover 10 respectively. The outer stop 9 of the end cover is in interference fit with the inner stop 8 of the motor casing, and the end face of the end cover is in contact with the end face of the motor casing. A plurality of first ears 6 are symmetrically extended on the outer circle of the both ends of the motor casing, and the first ears have first internal threads 13. A plurality of second ears 7 are symmetrically extended on the outer circle of the end cover 10, and the second ears have through holes 12. A bolt 3 is screwed on the first internal threads of the first ears through the through holes. The feature is that the circumferential length of the first ears and the second ears is greater than the diameter of the bolt, the second ears are provided with second internal threads 11, and there is a gap between the second internal threads and the through holes in the circumferential direction.

[0005] The utility model has the beneficial effects that internal threads are arranged on the ears of the end cover. When disassembling the end cover, the bolt is first unscrewed from the motor casing, and then the bolt is screwed in the internal threads of the end cover. The front end of the bolt abuts against the first ear, and the end cover can be separated from the motor casing by rotating the bolt one by one. This greatly facilitates the disassembly of the end cover, and the motor casing and the end cover are not damaged during the disassembly process. BRIEF DESCRIPTION OF DRAWINGS

[0006] Figure 1 The utility model is a structural schematic diagram.

[0007] Figure 2 It is the right view of the motor casing.

[0008] Figure 3 It is the A view of the end cover.

[0009] Reference signs: 1-rotating shaft, 2-removal bolt, 3-bolt, 4-radiating rib, 5-casing, 6-first lug, 7-second lug, 8-internal stop of casing, 9-external stop of end cover, 10-end cover, 11-second internal thread, 12-through hole, 13-first internal thread. DETAILED DESCRIPTION

[0010] The connecting structure of the casing and the end cover of the motor comprises the casing 5, the surface of which is provided with the radiating ribs 4, and the both ends of which are provided with the end covers 10, the rotating shaft 1 of the motor is supported in the end cover, the external stop 9 of the end cover is in interference fit with the internal stop 8 of the casing, the end face of the end cover is in contact with the end face of the casing, the external circle of the both ends of the casing extends symmetrically a plurality of first lugs 6, the first lugs are provided with the first internal threads 13, the external circle of the end cover 10 extends symmetrically a plurality of second lugs 7, the second lugs are provided with the through holes 12, and the bolts 3 are screwed in the first internal threads of the first lugs through the through holes; characterized in that the circumferential length of the first lugs and the second lugs is 4 times the diameter of the bolt, the second lugs are provided with the second internal threads 11, and the second internal threads and the through holes are spaced along the circumference.

[0011] The removal bolt 2 is screwed in the second internal thread 11, and the front end of the removal bolt can abut against the first lug.

[0012] When the end cover is disassembled, the bolt is first unscrewed from the casing, and then the removal bolt 2 is rotated one by one, so that the front end of the removal bolt abuts against the first lug of the casing, and the end cover is separated from the casing. This greatly facilitates the disassembly of the end cover, and the casing and the end cover will not be damaged during the disassembly process.

[0013] The second internal thread of the end cover has the same pitch and internal diameter as the first internal thread of the casing, so that the removal bolt 2 can be replaced by the bolt 3, that is, the bolt can be used to fasten the end cover or to remove the end cover.

Claims

1. A connection structure between the housing and end caps of an electric motor, comprising a housing (5), end caps (10) respectively provided at both ends of the housing, the outer stop (9) of the end caps being interference-fitted with the inner stop (8) of the housing, the end face of the end caps being in contact with the end face of the housing, a plurality of first ears (6) symmetrically extending from the outer circles of both ends of the housing, each first ear having a first internal thread (13), a plurality of second ears (7) symmetrically extending from the outer circles of the end caps (10), each second ear having a through hole (12), and a bolt (3) passing through the through hole and screwed onto the first internal thread of the first ear; characterized in that, The first ear and the second ear have a circumferential length greater than the diameter of the bolt. The second ear is provided with a second internal thread (11), and there is a circumferential gap between the second internal thread and the through hole.

2. The connection structure between the motor housing and the end cover according to claim 1, characterized in that, The first and second ears have a circumferential length that is four times the bolt diameter.

3. The connection structure between the motor housing and the end cover according to claim 1 or 2, characterized in that, The second internal thread (11) has a pull-out bolt (2) screwed in.

4. The connection structure between the motor housing and the end cover according to claim 1 or 2, characterized in that, The pitch and inner diameter of the second internal thread (11) of the end cap are the same as those of the first internal thread (13) of the housing.

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