CN202395571U

CN202395571U - Outer-rotor direct-current brushless motor

Info

Publication number: CN202395571U
Application number: CN2011205060797U
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: 2011-12-06
Filing date: 2011-12-06
Publication date: 2012-08-22
Anticipated expiration: 2021-12-06

Abstract

The utility model discloses an outer-rotor direct-current brushless motor, which comprises a stator coil assembly, a stator bearing support, a bearing mounted in the stator bearing support, a stator end cover, a rotor outer side end cover, a bearing chamber arranged on the rotor outer side end cover, a bearing mounted in the bearing chamber and an outer rotor assembly consisting of a permanent magnet, an iron ring and a solid shaft. The outer-rotor direct-current brushless motor is characterized in that the rotor outer side end cover and the bearing chamber are integrally formed, a casing is integrally arranged on the edge of the rotor outer side end cover, and a concentric fixing structure is arranged at the position where the casing on the rotor outer side end cover corresponds to the edge of the stator end cover so as to form concentric fixed assembly. The concentricity accuracy and the structure rigidity of the outer-rotor direct-current brushless motor adopting a double-bearing double-end structure are improved greatly, vibration and noise are reduced, simultaneously the production process and cost are reduced, and various installation parts can be further arranged at positions of the casing, so that the outer-rotor direct-current brushless motor is compatible with an inner-rotor motor in the installation mode and suitable for application in 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, the stator support of bearing; Be 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 chamber; Bearing is housed in the bearing chamber; By the external rotor assembly that permanent magnet, iron ring, solid shafting are formed, integration system has casing to rotor outside end cap with the bearing chamber integrated molding and at end cap edge, the rotor outside, outside rotor, is shaped on concentric fixing structure between the corresponding position at end cap casing and stator end cap edge and becomes concentric and install.

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

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 14, and the stator support of bearing 10 is contained in the bearing 12 in the stator support of bearing 10 central bearing chambers 13; Stator end cap 7; Rotor outside end cap 1, rotor outside end cap 1 central authorities are shaped on is equipped with bearing 3 in the bearing chamber 2, the external rotor assembly of being made up of permanent magnet 9, iron ring 8, solid shafting 11; Thereby form external rotor assembly duplex bearing both-end axle bistable securing structure; End cap 1 edge integration system has casing 4 to rotor outside end cap 1 with bearing chamber 2 integrated moldings and in the rotor outside, and end cap casing 4 installs end and is shaped on the annular stopper concave station 5 with the concentric band inclined-plane of bearing chamber 2 in the rotor outside, at the integrated annular stopper boss 6 with adaptive inclined-plane concentric with bearing chamber 13 that be shaped on of stator end cap 7 edge corresponding positions; Concentric closed butt joint through annular stopper boss 6 and annular stopper concave station 5 installs, and casing 4 is installed for 13 one-tenth with bearing chamber with stator end cap 7 and bearing chamber 2 with one heart.Be shaped on the hangers 15 of four even cloth on the casing 4, through hangers 15, 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.

Claims

1. external rotor DC Brushless Motor, it comprises the stator coil assembly, the stator support of bearing; Be 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 chamber; Bearing is housed in the bearing chamber; External rotor assembly by permanent magnet, iron ring, solid shafting are formed is characterized in that: integration system has casing to rotor outside end cap with the bearing chamber integrated molding and at end cap edge, the rotor outside, outside rotor, is shaped on concentric fixing structure between the corresponding position at end cap casing and stator end cap edge and becomes concentric and install.

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

3. external rotor DC Brushless Motor according to claim 2 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.