CN202309466U

CN202309466U - External rotor DC brushless motor

Info

Publication number: CN202309466U
Application number: CN2011204341986U
Authority: CN
Inventors: 蒋亮健; 梁柱; 邵浩锡; 黄剑来; 谭进兵
Original assignee: FOSHAN NANHAI DISTRICT DONGTANG ELECTRICAL MACHINERY FACTORY
Current assignee: FOSHAN NANHAI DISTRICT DONGTANG ELECTRICAL MACHINERY FACTORY
Priority date: 2011-11-04
Filing date: 2011-11-04
Publication date: 2012-07-04
Anticipated expiration: 2021-11-04

Abstract

The utility model discloses an external rotor DC brushless motor. The external rotor DC brushless motor comprises an external rotor assembly, a stator coil assembly, an integrated part molded by a stator bearing support, a stator end cap and a casing, and an integrated part molded by a rotor external end cap and a bearing chamber. Concentric front edge structures are fixed on the corresponding position between the stator end cap casing and the edge of the rotor external end cap in a concentric manner, and the two integrated parts are concentrically connected for one time, such that the concentric precision and the structural rigidness of the external rotor DC brushless motor with a double bearing double-end structure are substantially improved, the vibration and the noise are minimized, the production processes are minimized, and the cost is reduced. Various mounting members can also be arranged on each position of the casing, such that the external rotor DC brushless motor is compatible with a conventional internal rotor motor in terms of a mounting model and is suitable for being applied to various devices.

Description

The external rotor DC Brushless Motor

Technical field

The utility model relates to a kind of DC Brushless Motor, especially a kind of external rotor DC Brushless Motor.

Background technology

The external rotor DC Brushless Motor major part of prior art all adopts the stator end cap to be shaped on the stator support of bearing at present, is shaped on two bearing chambers in the stator support of bearing, and two bearings are housed; The solid shafting of external rotor assembly is one-sided to pass two bearings, thereby forms a kind of external rotor rotary power way of output of single-ended axle single-cantilever, the external rotor DC Brushless Motor of this single-ended axle single-cantilever structure; It is high to have dynamo-electric usefulness; Power saving, the magnetoelectricity signal resolution is remarkable advantage clearly, is particularly suitable at small power motor; Like the ventilating fan in the computer, various low power ventilation equipment, use in the small-power water pump.Yet when being applied to powerful slightly external rotor DC Brushless Motor, the external rotor rotary power way of output of this single-ended axle single-cantilever shape will cause occurring mechanical oscillation and noise because of poor rigidity, and this is need be improved.

In addition; The external rotor DC Brushless Motor of prior art can only install the mounting means of position in the setting of stator end cap; Can with two ends protection end cap the multi-direction multiposition mounting means that installs the position be set arbitrarily at electric machine casing with the inner rotor motor of routine and compare, have very big installation site difference, can not be compatible fully on installing and using; Being difficult to adapt to the various different use occasion installation requirements of existing machine, also is need be improved.

The utility model content

The technical problem that the utility model will solve provides and a kind ofly greatly also can not produce mechanical oscillation and noise in power output, and also compatible with conventional inner rotor motor external rotor DC Brushless Motor on installing and using and aspect the product reliability globality.

For solving the problems of the technologies described above; The external rotor DC Brushless Motor of the utility model comprises the stator coil assembly, and the stator support of bearing is contained in the bearing in the stator support of bearing; The stator end cap; Rotor outside end cap, rotor outside end cap is shaped on bearing is housed in the bearing chamber, the external rotor assembly of being made up of permanent magnet, iron ring, solid shafting; The stator support of bearing and stator end cap integrated molding and at stator end cap edge integration system has casing, between the corresponding position at end cap edge, stator end cap casing and the rotor outside, be shaped on concentric fixing structure and become concentric and install.

As realizing that the utility model is shaped on concentric fixing structure in conceiving basically and becomes the concentric first kind of technical scheme that installs between the corresponding position at end cap edge outside stator end cap casing and the rotor; Be that the end that installs at stator end cap casing is shaped on the annular stopper boss with the concentric band inclined-plane of bearing chamber; The corresponding position integration system at end cap edge has casing and the end that installs of end cap casing is shaped on the annular stopper concave station with adaptive inclined-plane concentric with bearing chamber in the rotor outside in the rotor outside, band inclined-plane annular stopper boss be with adaptive inclined-plane annular stopper concave station to become concentric closely to install.

As realizing that the utility model is shaped on concentric fixing structure in conceiving basically and becomes the concentric second kind of technical scheme that installs between the corresponding position at end cap edge outside stator end cap casing and the rotor; Be that the end that installs at stator end cap casing is shaped on the annular stopper concave station with the concentric band inclined-plane of bearing chamber; The corresponding position at end cap edge is integrated in the rotor outside is shaped on the annular stopper boss with adaptive inclined-plane concentric with bearing chamber, band inclined-plane annular stopper concave station be with adaptive inclined-plane annular stopper boss to become concentric closely to install.

Through with one-sided one of them bearing that places stator end cap stator axis to hold two bearings in the support of former technology; Outer dislocation is in the bearing chamber of the rotor outside end cap central authorities that newly establish; External rotor DC Brushless Motor effective power make the single-ended axle of the duplex bearing single-cantilever structure of former technology change duplex bearing both-end axle bistable structure into, even also can not produce the vibration and noise of former single-cantilever bearing scheme when increasing.

The stator support of bearing, stator end cap, housing, the structure-integrated production of annular stopper are shaped to a global facility concentric with bearing chamber; The structure-integrated production of annular stopper of rotor outside end cap, bearing chamber, corresponding position is shaped to another global facility concentric with bearing chamber; Again with the concentric fixing structure of two global facilities through a cover band inclined-plane; Installing is an external rotor DC Brushless Motor with complete casing; On the one hand, owing to adopt two disposable concentric tippings of parts, reduced the accumulated error that multi-part forms to greatest extent; Improved the external rotor DC Brushless Motor greatly and adopted the needed concentricity precision of duplex bearing both-end structure, effectively reduce the high quick-action of external rotor when changeing because of the big vibration and noise that produces of concentricity error; Two aspects adopt the frame mode of two integrated production moulding of parts, effectively reduce production process and production cost, have the production efficiency height, output is big, the advantage that cost is low; Three aspects; At stator end cap integrated molding band casing; Just can be on casing each position integration system of various aspects just like the various kinds installation component of hangers, support, thereby overcome the use limitation that original technological external rotor DC Brushless Motor can only be provided with installation component in stator end cap one side, thereby; Also can be compatible on various machinery equipments with the mounting means of conventional inner rotor motor; And global reliability and intensity in installation component, casing protection all can increase, thereby also can reduce vibration and noise, and present technique can be used in various external rotor DC Brushless Motor.

Description of drawings

Fig. 1 is a kind of external rotor DC Brushless Motor of the utility model embodiment general structure section diagrammatic sketch;

Fig. 2 is the blast diagrammatic sketch of Fig. 1;

Fig. 3 is another embodiment general structure section diagrammatic sketch of a kind of external rotor DC Brushless Motor of the utility model;

Fig. 4 is the blast diagrammatic sketch of Fig. 3.

Embodiment

Below in conjunction with accompanying drawing and embodiment the utility model is described further:

Referring to Fig. 1 and Fig. 2, the utility model comprises stator coil assembly 7, the stator support of bearing 12; Be contained in the bearing 13 in the stator support of bearing 12 central bearing chambers 14; Stator end cap 15, rotor outside end cap 8, rotor outside end cap 8 central authorities are shaped on is equipped with bearing 10 in the bearing chamber 11; The external rotor assembly of forming by permanent magnet 6, iron ring 5, solid shafting 9; Thereby form external rotor assembly duplex bearing both-end axle bistable securing structure, the stator support of bearing 12 has casing 1 with stator end cap 15 integrated moldings and at stator end cap 15 edge integration systems, installs end at stator end cap casing 1 and is shaped on the annular stopper boss 2 with the concentric band inclined-plane of bearing chamber 14; End cap 8 edge integration systems have casing 4 in the rotor outside; Casing 4 installs end and is shaped on an annular stopper concave station 3 with adaptive inclined-plane concentric with bearing chamber 11, and the concentric closed butt joint through annular stopper tang 2 and annular stopper concave station 3 installs, and casing 1 is installed for 11 one-tenth with bearing chamber with casing 4 and bearing chamber 14 with one heart.Be shaped on the hangers 17 of three even cloth on the casing 1; Be shaped on the hangers 16 of three even cloth on the casing 4; Through hangers 17.16, can be with the external rotor DC Brushless Motor as former internal rotor alternating current motor hangers mounting means, replace compatiblely and be installed on the former use equipment.

Fig. 3 and Fig. 4 are the embodiment diagrammatic sketch of second kind of technical scheme in the utility model; Referring to Fig. 3 and Fig. 4; Present embodiment comprises like the identical external rotor assembly duplex bearing both-end axle bistable securing structure among Fig. 1 embodiment; Difference is that the end that installs at stator end cap casing 18 is shaped on the annular stopper concave station 19 with the concentric band inclined-plane of bearing chamber 14; The corresponding position at end cap 21 edges is integrated in the rotor outside is shaped on the annular stopper boss 20 with adaptive inclined-plane concentric with

bearing chamber

11, and 20 one-tenth of annular stopper concave station 19 and annular stopper boss are concentric closely to install dress.

Claims

1. external rotor DC Brushless Motor; It comprises the stator coil assembly, and the stator support of bearing is contained in the bearing in the stator support of bearing; The stator end cap; Rotor outside end cap, rotor outside end cap is shaped on bearing is housed in the bearing chamber, the external rotor assembly of being made up of permanent magnet, iron ring, solid shafting; It is characterized in that: the stator support of bearing and stator end cap integrated molding and at stator end cap edge integration system has casing, between the corresponding position at end cap edge, stator end cap casing and the rotor outside, be shaped on concentric fixing structure and become concentric and install.

2. external rotor DC Brushless Motor according to claim 1; It is characterized in that: described concentric fixing structure is to hold installing of stator end cap casing to be shaped on the annular stopper boss concentric with bearing chamber; In the rotor outside corresponding position integration system at end cap edge casing is arranged and in the rotor outside end system that the installs annular stopper concave station concentric of end cap casing with bearing chamber, the annular stopper boss becomes concentric with the annular stopper concave station and installs.

3. external rotor DC Brushless Motor according to claim 1; It is characterized in that: described concentric fixing structure is to hold installing of stator end cap casing to be shaped on the annular stopper concave station concentric with bearing chamber; The corresponding position at end cap edge is integrated in the rotor outside is shaped on the annular stopper boss concentric with bearing chamber, and the annular stopper boss becomes concentric with the annular stopper concave station and installs.

4. according to claim 2 or 3 described external rotor DC Brushless Motor, it is characterized in that: described annular stopper boss is shaped on the inclined-plane, becomes concentric with adaptive inclined-plane that described annular stopper concave station is shaped on and closely installs.