CN201204507Y - DC brushless outer rotor motor - Google Patents

Abstract

The utility model relates to a direct-current brushless external rotor motor which adopts the fastening structure of stator iron core external bump, that is, bearing bracket internal groove, thereby improving the problem of partial iron deficiency loss caused by stator iron core internal groove in the prior part as well as improving the overall effective rate. The technical solution is applicable for various direct-current brushless external rotor motors.

Description

The dc brushless external rotor motor

Technical field

The utility model relates to a kind of direct current machine, especially a kind of dc brushless external rotor motor.

Background technology

In the prior art, the indent groove that has a kind of dc brushless external rotor motor to be shaped in its support of bearing adopts outer projection locate mode and stator core becomes the cooperation of fastening location, this support of bearing is outer, and projection---stator core indent groove mode causes stator core indent iron deficiency to leave a blank damaged, thereby the corresponding dc brushless external rotor efficiency of motor that reduced, this is to need further to improve to improve.

Summary of the invention

The utility model purpose is to provide a kind of efficient height, the dc brushless external rotor motor of good economy performance.

The utility model comprises stator core, the stator end cap, the support of bearing, bearing, external rotor assembly and the automatically controlled circuit board formed by outer rotor case, magnet ring, outer rotor shaft, be shaped on the positioning groove of indent at support of bearing cylindrical, the circle correspondence position is shaped on the locating convex block of evagination in stator core, and locating convex block becomes secure fit with positioning groove.Owing to adopted outer projection---the fastening location of the support of bearing indent groove technical scheme of stator core of the present invention, can improve local iron deficiency that the indent groove of prior art stator core the caused deletion problem of leaving a blank, improved the whole efficiency of dc brushless external rotor motor, and can save the casting aluminium material cost of the support of bearing, have the advantage of efficient height, the low good economy performance of cost, the technical program is adapted at adopting in the various dc brushless external rotor motors.

Description of drawings

Fig. 1 is the general structure generalized section of the utility model embodiment;

Fig. 2 is the partial exploded view of the utility model embodiment middle (center) bearing support, stator core.

Embodiment

The utility model is described in further detail for the following examples and accompanying drawing:

Referring to Fig. 1 and Fig. 2, the present invention includes stator core 3, stator end cap 1, the support of bearing 6, bearing 4 by external rotor assembly and the automatically controlled circuit board 2 that outer rotor case 7, magnet ring 8, outer rotor shaft 5 are formed, is shaped on the indent positioning groove 10 of three even cloth at the support of bearing 6 cylindricals, the circle correspondence position is shaped on the evagination locating convex block 9 of three even cloth, 10 one-tenth secure fit of locating convex block 9 and positioning groove in stator core 3.

Claims (1)

1, a kind of dc brushless external rotor motor, it comprises stator core, the stator end cap, the support of bearing, bearing, external rotor assembly and automatically controlled circuit board by outer rotor case, magnet ring, outer rotor shaft are formed is characterized in that: the positioning groove that is shaped on indent at support of bearing cylindrical, the circle correspondence position is shaped on the locating convex block of evagination in stator core, and locating convex block becomes secure fit with positioning groove.

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