CN202586699U

CN202586699U - Outer rotor direct current brushless motor

Info

Publication number: CN202586699U
Application number: CN 201220148510
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: 2012-04-09
Filing date: 2012-04-09
Publication date: 2012-12-05
Anticipated expiration: 2022-04-09

Abstract

The utility model discloses an outer rotor direct current brushless motor which comprises an outer rotor assembly, a stator coil assembly, an integrative assembly which is formed by a stator bearing bracket, a stator end cap and a case, and an integrative assembly which is formed by a rotor outer end cap, a bearing chamber and a shell. A concentric stop port structure is fabricated between a rotor outer end cap shell and a corresponding position of a stator end cap edge to form concentric fixed installation. Two integrative assemblies are subjected to concentric installation in one time, concentricity precision and structure rigidity of an outer rotor direct current brushless motor which employs a double-bearing double-end structure are greatly raised, a solid shaft power output end of the outer rotor assembly passes through the rotor outer end cap, a force arm which presents eccentric jumping and generates a centrifugal force effect is shortened, vibration and noise are reduced, production process and cost are reduced at the same time, various fixedly mounted members are arranged at various positions of the shell, and the motor is compatible with an installation mode of a conventional inner rotor motor and is suitable for being applied in various equipment.

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 most of stator end cap that adopts of the external rotor DC Brushless Motor of prior art is 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; Solid shafting one end of external rotor assembly is for installing end, and in one-sided two bearings that are through the stator support of bearing, the other end of solid shafting is a clutch end; Pass the bearing and the stator end cap of stator end cap side; Thereby forming a kind of bearing with stator end cap side is fulcrum, the stator end cap side outer rotor shaft power way of output of one-sided axle suspension arm, the external rotor DC Brushless Motor of this stator end cap side outer rotor shaft power output structure; It is high to have dynamo-electric usefulness; Power saving, the magnetoelectricity signal resolution is remarkable advantage clearly, is particularly suitable in small power motor, using.Yet when being applied to powerful slightly external rotor DC Brushless Motor, the cantilever-shaped stator end cap side outer rotor shaft power way of output of this single-ended axle will cause mechanical oscillation and noise because of poor rigidity, and this 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 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, by the external rotor assembly that permanent magnet, iron ring, solid shafting are formed, rotor outside end cap and bearing chamber integrated molding and outside rotor end cap edge integration system casing is arranged; Install member integrated being shaped on of rotor outside end cap casing; Between the corresponding position at rotor outside end cap casing and stator end cap edge, be shaped on concentric fixing structure and become concentric and install, solid shafting installs end and is through in the bearing of end cap bearing chamber outside bearing and the rotor in the stator support of bearing, and the solid shafting clutch end passes outside the rotor end cap bearing chamber bearing and passes outside the rotor outside the end cap.

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.

Through with the stator end cap foreign side of solid shafting clutch end to; Changing into clutch end passes rotor outside end cap bearing chamber bearing and passes outside the rotor-side end cap; Promptly be to be fulcrum with the bearing of stator end cap side with former technological solid shafting clutch end; The bearing that changes into end cap bearing chamber outside the rotor of newly establishing is a fulcrum; Make that rotatablely moving of permanent magnet, iron ring acts on the force of solid shafting in the external rotor assembly; From at a distance of the long distance of the offside of stator end cap bearing fulcrum, change into homonymy short distance near rotor outside end cap bearing fulcrum, shorten the external rotor assembly greatly and the arm of force that eccentricity runout produces centrifugal action when assembling, occurred; Thereby because of the long excessive vibration and noise that produces of the external rotor assembly eccentricity runout arm of force, present technique can be used in various external rotor DC Brushless Motor when greatly reducing the increase of external rotor DC Brushless Motor effective power.

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 11, the stator support of bearing 12; Be contained in the bearing 14 in the stator support of bearing 12 central bearing chambers 15; Stator end cap 16, rotor outside end cap 2, rotor outside end cap 2 central authorities are shaped on is equipped with bearing 4 in the bearing chamber 3; The external rotor assembly of forming by permanent magnet 10, iron ring 9, solid shafting 13; Thereby form external rotor assembly duplex bearing bistable securing structure, end cap 2 edge integration systems have casing 5 to rotor outside end cap 2 with bearing chamber 3 integrated moldings and in the rotor outside, and end cap casing 5 installs end and is shaped on the annular stopper concave station 6 with the concentric band inclined-plane of bearing chamber 3 in the rotor outside; At stator cover 16 edge corresponding position integration systems casing 8 is arranged; Be shaped on an annular stopper boss 7 with adaptive inclined-plane concentric with bearing chamber 15 at stator end cap casing 8 edges, the concentric closed butt joint through annular stopper boss 7 and annular stopper concave station 6 installs, and casing 8 is installed for 3 one-tenth with bearing chamber with casing 5 and bearing chamber 15 with one heart.Solid shafting 13 installs end and is through in the bearing 4 of bearing 14 and rotor outside end cap bearing chamber 3 in the stator support of bearing 12; Solid shafting 13 clutch ends 1 pass rotor outside end cap bearing chamber 3 bearings 4; Pass outside the end cap 2 of the rotor outside, casing 5 integrated being shaped on install cover 17, through installing cover 17; Can as former internal rotor alternating current motor install the cover 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, 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; Rotor outside end cap and bearing chamber integrated molding and outside rotor end cap edge integration system casing is arranged; Between the corresponding position at rotor outside end cap casing and stator end cap edge, be shaped on concentric fixing structure and become concentric and install, solid shafting installs end and is through in the bearing of end cap bearing chamber outside bearing and the rotor in the stator support of bearing, it is characterized in that: the solid shafting clutch end passes outside the rotor outside the end cap.

2. external rotor DC Brushless Motor according to claim 1 is characterized in that: install member integrated being shaped on of described rotor outside end cap casing.