CN104393692A

CN104393692A - Electric motor

Info

Publication number: CN104393692A
Application number: CN201410781708.5A
Authority: CN
Inventors: 许权; 李利娟; 许洪清; 张世俊; 张立飞
Original assignee: Anhui Wannan Electric Machine Co Ltd
Current assignee: Anhui Wannan Electric Machine Co Ltd
Priority date: 2014-12-16
Filing date: 2014-12-16
Publication date: 2015-03-04

Abstract

The invention relates to an electric motor of which a stator iron core and a rotor iron core have different lengths. The electric motor comprises the stator iron core and the rotor iron core; one of the axial length of the stator iron core and the axial length of the rotor iron core is equal to the standard design length and the other one of the axial length of the stator iron core and the axial length of the rotor iron core is greater than the standard design length. The axial length of one of the stator iron core and the rotor iron core is greater than the standard design length, and thus, variation, which is caused by axial malposition of the stator iron core and the rotor iron core, of the fit length of the stator iron core and the rotor iron core can be effectively avoided, so that the performance of the electric motor reaches the optimal level.

Description

Motor

Technical field

The present invention relates to the motor that a kind of stator core is different from rotor core length.

Background technology

In productive life, common middle-size and small-size motor applications widely, stator in this motor is identical with rotor length, if when assembling, there is not axile displacement in stator core and rotor core, namely stator core and rotor core length of fit and design load are consistent, and the performance of motor just can be played fully.

And in practical set process, owing to there is the external factor such as dimensional tolerance and rigging error, stator core and rotor core can not realize zero dislocation in the axial direction, once there is axile displacement in stator core and rotor core, stator core and rotor core effective length shorten, and motor properties all can be affected.

Summary of the invention

The object of this invention is to provide a kind of motor, the stator core of motor can be made identical with Theoretical Design value with rotor core length of fit.

To achieve these goals, the technical solution used in the present invention is: a kind of motor, comprise stator core and rotor core, the axial length of described stator core and the axial length of rotor core one of them be design standard length, another is longer than standard design length.

Adopt motor of the present invention, because stator core and one of them axial length of rotor core are greater than standard design length, stator core and rotor core generation axile displacement effectively can be avoided to cause the two length of fit to change, thus motor performance is stablized.

Accompanying drawing explanation

Fig. 1 is the broken section structural representation of the embodiment of the present invention 1;

Fig. 2 is the broken section structural representation of the embodiment of the present invention 2;

Fig. 3 is the enlarged drawing at A place in Fig. 1;

Fig. 4 is the enlarged drawing at B place in Fig. 2.

Embodiment

As shown in Figure 1 or 2, a kind of motor, comprises stator core 10 and rotor core 20, the axial length of described stator core 10 and the axial length of rotor core 20 one of them be design standard length, another is longer than design standard length.One of stator core 10 or rotor 20 are set to standard design length, meet the prime design requirement of motor, two end faces being longer than the iron core of standard design length protrude from iron core two ends one segment length of standard design respectively, the axile displacement that the external factor such as dimensional tolerance and rigging error may cause can be made up, ensure that stator core 10 is design standard length with the length of fit of rotor core 20.

Below in conjunction with accompanying drawing, two embodiments of the present invention are elaborated.

Embodiment 1: composition graphs 1 and Fig. 3, described stator core 10 axial length 2 ~ 5mm longer than rotor core 20 axial length, i.e. Δ 1+ Δ 2=2 ~ 5mm in figure, according to scope and the practical production experience of the tolerance allowed during design, stator core 10 two ends are protruded from respectively the two ends 1 ~ 2.5mm of rotor core 20, the axile displacement that the external factor such as dimensional tolerance and rigging error may cause can be made up, while saving material as far as possible, ensure that stator core 10 remains on standard design value with the length of fit of rotor core 20.

Embodiment 2: composition graphs 2 and Fig. 4, described rotor core 10 axial length 2 ~ 5mm longer than stator core 20 axial length, namely the Χ 1+ Χ 2=2 ~ 5mm in figure, according to scope and the practical production experience of the tolerance allowed during design, rotor core 20 two ends are protruded from respectively the two ends 1 ~ 2.5mm of stator core 10, the axile displacement that the external factor such as dimensional tolerance and rigging error may cause can be made up, while saving material as far as possible, ensure that stator core 10 remains on standard design value with the length of fit of rotor core 20.

Adopt motor of the present invention, because stator core 10 and one of them axial length of rotor core 20 are greater than standard design length, can have and make up when stator core 10 assembles with rotor core 20 due to axile displacement that the external factor such as dimensional tolerance and rigging error causes, avoid the two length of fit to change, thus motor performance is stablized.

Compared to needing strictly control installation accuracy when the stator core of conventional motors and rotor core assembling, motor of the present invention is when assembling, the surplus left due to longer iron core two ends is more, installation accuracy require lower, therefore motor assemble time also more for convenience.

Claims

1. a motor, comprise stator core (10) and rotor core (20), it is characterized in that: the axial length of described stator core (10) and the axial length of rotor core (20) one of them be design standard length, another is longer than design standard length.

2. motor according to claim 1, is characterized in that: described stator core (10) axial length 2 ~ 5mm longer than rotor core (20) axial length.

3. motor according to claim 1, is characterized in that: described rotor core (10) axial length 2 ~ 5mm longer than stator core (20) axial length.