AU2011100625A4

AU2011100625A4 - Low-vibration motor

Info

Publication number: AU2011100625A4
Application number: AU2011100625A
Authority: AU
Inventors: Weiping Zhao
Original assignee: Hengdian Group Linix Motor Co Ltd
Current assignee: Hengdian Group Linix Motor Co Ltd
Priority date: 2011-05-26
Filing date: 2011-05-26
Publication date: 2011-07-28
Anticipated expiration: 2019-05-26

Abstract

Abstract The invention relates to a low-vibration motor, belonging to the technical field of motor manufacture. The low-vibration motor comprises a housing, both ends of the housing are respectively provided with a front end cover and rear end cover, a rotor is rotatably supported between the front end cover and the rear end cover in the housing via beatings, the front end cover and the rear end cover are respectively provided with a bearing chamber for setting a bearing, a cup-shaped rubber sleeve is arranged in said each bearing chamber, said each rubber sleeve comprises a cylindrical part and a bottom part, and the outer wall of the outer race of the bearing is fitted in the cylindrical part of the each rubber sleeve. The low-vibration motor has low machining cost and can favorably insure the coaxiality of the beatings and the rotating shaft of the motor.

Description

Description LOW-VIBRATION MOTOR Technical field The invention relates to a low-vibration motor, belonging to the technical field of motor manufacture. Background art Bearing chambers for setting bearings are usually machined on the front end cover and rear end cover of a motor, and the outer races of the bearing are directly and tightly assembled in the bearing chambers. Such structure requires high machining precision of the inner walls of the bearing chambers; otherwise, the coaxiality of the bearings assembled in the bearing chambers and the rotating shaft of a motor is poor, resulting in serious vibration of the motor during working and high machining cost. Summary of the invention The object of the invention is to provide a low-vibration motor which has low machining cost and can favorably insure the coaxiality of bearings and the rotating shaft of a motor, to solve the problem that the prior art requires high machining precision of the inner walls of a bearing chambers; otherwise, the coaxiality of the bearings assembled in bearing chambers and the rotating shaft of a motor is poor, resulting in serious vibration of the motor during working and high machining cost. The above-mentioned technical object of the invention is realized by the following technical scheme: the low-vibration motor comprises a housing, both ends of the housing are respectively provided with a front end cover and rear end cover, a rotor is rotatably supported between the front end cover and the rear end cover in the housing via bearings, the front end cover and the rear end cover are respectively provided with a bearing chamber for setting a bearing, a cup-shaped rubber sleeve is arranged in said each bearing chamber, said each rubber sleeve comprises a cylindrical part and a bottom part, and the outer wall of the outer race of each bearing is fitted in the cylindrical part of said each rubber sleeve. The rubber sleeves arranged between the inner walls of the bearing chambers and the outer races of the bearings moderate the demand of the inner walls of the bearing chambers for machining precision, and the bearing chambers do not need finish machining, so that machining cost is reduced, the coaxiality of the bearings and the rotating shaft of the motor is favorably insured, and meanwhile, the rubber sleeves can reduce vibration of the motor rotor. Preferably, the bottom part of said each rubber sleeve is provided with a through hole for penetration of the rotating shaft of the motor. Preferably, a gap is formed between the inner surface of the bottom part of said each rubber sleeve and the end surface of each bearing to prevent frictional contact between the end surface of the inner ring of the motor and the bottom part of the rubber sleeve, reduce the resistance to the motor rotor and protect the rubber sleeve from abrasion. Preferably, the height of said rubber sleeves is larger than that of bearing chambers to insure the outer races of bearing are completely positioned in rubber sleeves. Therefore, the invention has low machining cost, can favorably insure the coaxiality of the bearings and the rotating shaft of the motor and reduce vibration of the motor rotor to some extend. Brief description of the drawings FIG. I is a structural diagram of the invention; and FIG. 2 is a partial enlargement view of A position in FIG. 1. Detailed description of the embodiment The technical scheme of the invention is further described in details by combining the following embodiment and drawings. Embodiment 1: referring to FIG. I and FIG. 2, both ends of a housing 7 are respectively provided with a front end cover I and a rear end cover 2, a rotor is rotatably supported between the front end cover and the rear end cover of the housing via bearings 5, the front end cover I and the rear end cover 2 of the motor are respectively provided with a bearing chamber 3 for setting a bearing, a cup-shaped rubber sleeve 4 is arranged in each bearing chamber 3, each rubber sleeve 4 comprises a cylindrical part 41 and a bottom part 42, the outer wall of the outer race of each bearing 5 is fitted in the cylindrical part 41 of the rubber sleeve 4, the bottom part of the rubber sleeve 4 is provided with a through hole 6 for penetration of the rotating shaft of the motor, a gap is formed between the inner surface of the bottom part 41 of the rubber sleeve 4 and the end surface of the bearing 5, and the height of the rubber sleeve is larger than that of the bearing chamber 3. The rubber sleeves arranged between the inner walls of the bearing chambers and the outer races of the bearings moderate the demand of the inner walls of the bearing chambers for machine precision, and the bearing chambers do not need finish machining, so that the machining cost is reduced, the coaxiality of the bearings and the rotating shaft of the motor is favorably insured, and meanwhile, the rubber sleeves can reduce vibration of the motor rotor to some extend.

Claims

1. A low-vibration motor comprising a housing, both ends of the housing being respectively provided with a front end cover and rear end cover, a rotor being rotatably supported between the front end cover and the rear end cover in the housing via bearings, the front end cover and the rear end cover being respectively provided with a bearing chamber for setting a bearing, said low-vibration motor being characterized in that a cup-shaped rubber sleeve is arranged in said each bearing chamber, said each rubber sleeve comprises a cylindrical part and a bottom part, and the outer wall of the outer race of each bearing is fitted in the cylindrical part of said each rubber sleeve.

2. The low-vibration motor according to claim 1, characterized in that the bottom part of said each rubber sleeve is provided with a through hole for penetration of the rotating shaft of a rotor.

3. The low-vibration motor according to claim I or 2, characterized in that a gap is formed between the inner surface of the bottom part of the rubber sleeve and the end surface of the bearing.

4. The low-vibration motor according to claim I or 2, characterized in that the height of the rubber sleeve is larger than that of the bearing chamber.