CN1407695A

CN1407695A - Structure of D.C. brushless motor

Info

Publication number: CN1407695A
Application number: CN 01131166
Authority: CN
Inventors: 洪银树; 洪庆升; 尹佐国
Original assignee: Sunonwealth Electric Machine Industry Co Ltd
Current assignee: Sunonwealth Electric Machine Industry Co Ltd
Priority date: 2001-09-05
Filing date: 2001-09-05
Publication date: 2003-04-02

Abstract

A structure of D.C. brushless motor is formed by a cylindric basement with a through hole, where a rotor located in, a cap with a shaft hole where the rotor is pivoted, two groups, at least, of coils attached to the basement, and an IC controller is also attached to the basement and electrically connected with the said coils. This invention eliminates prior weaknesses and has some advantages such as simple structure, compact size, easy to produce, widely used, and large torque force.

Description

The DC Brushless Motor structure

Technical field

The invention relates to a kind of DC Brushless Motor structure, especially a kind ofly form, can conveniently process assembling, and can make volume be reduced to minimum DC Brushless Motor structure by less member.

Background technology

See also shown in Figure 12, be a kind of known DC Brushless Motor structure, this DC Brushless Motor is by a stator seat 90 that is wound with coil, on it, under be respectively equipped with superior pole piece 91, inferior pole piece 92, superior pole piece 91, inferior pole piece 92 and stator seat 90 are passed through by a metal central siphon 93 and connect, this metal central siphon 93 also passes through and is connected to circuit board 94, establish the rotation axis 97 pivot joint rotations of bearing 95 in the metal central siphon 93 for rotor 96, rotor 96 itself has the permanent magnet 98 of N.S magnetic pole, N.S magnetic pole and the superior pole piece 91 that can produce magnetic force by this permanent magnet 98,92 magnetic force that produce the phase mutual repulsion of inferior pole piece can rotate this rotor 96.

In addition, see also shown in Figure 13, be a kind of known DC Brushless Motor structure, this DC Brushless Motor is stacked to a stator 80 by several pieces of silicon steel sheets, be wound with coil 82 respectively on the pole 81 of this stator 80, stator 80 centre junctions unification central siphon 83, this central siphon 83 can pass through simultaneously and be connected to circuit board 84, establish the rotation axis 87 pivot joint rotations of bearing 85 in the central siphon 83 for rotor 86, rotor 86 itself is provided with the permanent magnet 88 of tool N.S magnetic pole, N.S magnetic pole by this permanent magnet 88 produces the magnetic force of repulsion mutually with 81 of the poles of the stator 80 that can produce magnetic force, and this rotor 86 can be rotated.

This known DC Brushless Motor structure, it makes magnetism guiding access by superior pole piece 91, inferior pole piece 92, pole 81 or metal central siphon 93 respectively, and this

rotor

96,86 can be driven in rotation, and therefore, the volume of this known DC Brushless Motor structure can't effectively be reduced.And, because this DC Brushless Motor is produced the magnetic force of repulsion each other by superior pole piece 91, inferior pole piece 92 or pole 81 and the rotor permanent magnet 98,88 with N.S magnetic pole,

rotor

96,86 can be driven in rotation, but by this superior pole piece 91, inferior pole piece 92, pole 81 or metal central siphon 93 formed magnetism guiding access, to the rotary torsion of motor be reduced because of its material itself has magnetic resistance.

Summary of the invention

The purpose of this invention is to provide a kind of DC Brushless Motor structure, especially a kind of member is few, convenient processing and manufacture, and volume is little, and is applied widely, and the DC Brushless Motor structure of preferred rotary torsion is arranged.

The present invention includes the cylinder-shaped pedestal of tool one through hole or a room, through hole by this pedestal forms the rotation axis that axis hole is installed with rotor, or hold into rotation for rotor by the room of pedestal, and establish axis hole at pedestal one end and the cover plate that covers thereof, rotation axis hinge joint for rotor, pedestal itself is at least in conjunction with two groups of coils, pedestal also is provided with an IC control piece and is connected with two groups of coil electrics, form magnetic field by coil electricity and produce magnetic force, rotor permanent magnet with repulsion tool N.S magnetic pole is rotated, and rotor can be driven in rotation.

Technical scheme of the present invention is that a kind of DC Brushless Motor structure comprises:

One pedestal, tool one room, room one end can supply a cover plate combination, and cover plate and guest room are held each tool one axis hole in addition, and the wall of pedestal can be conducted to few two groups of coil combinations, and pedestal is provided with an IC control piece, and the IC control piece becomes to be electrically connected with coil;

One rotor, the permanent magnet of tool one rotation axis and a tool N.S magnetic pole, rotation axis hinge joint be at the axis hole of cover plate and pedestal, can directly produce the magnetic force of mutual repulsion mutually between the coil by permanent magnet and pedestal, and rotor can be driven in rotation.

The axis hole of cover plate and room respectively is provided with bearing.

The wall of pedestal is provided with fixture, and this fixture can be for coil in conjunction with the location.

The set fixture of the wall of this pedestal forms counterbore.

The post of fixture that the wall of this pedestal is set for protruding.

The rotation axis of this rotor respectively is arranged with a pad at permanent magnet two ends.

This base outer wall is provided with at least one rib.

This base outer wall is arranged with a shell.

This shell one end can supply the cover plate combination.

This IC control piece includes a drive circuit and a hall sensing element.

One end of this axis of rotor rotation protrudes from cover plate.

This rotation axis that protrudes from cover plate is combined with an eccentric part.

This rotation axis that protrudes from cover plate is combined with an impeller.

A kind of DC Brushless Motor structure comprises:

One pedestal, tool one through hole, the wall of this pedestal itself can be conducted to few two groups of coil combinations, and pedestal is provided with an IC control piece, and this IC control piece becomes to be electrically connected with coil;

One rotor, the permanent magnet of tool one rotation axis and a ring tool N.S magnetic pole, this rotation axis runs through the through hole that is articulated in pedestal, and this permanent magnet is looped around all sides of pedestal, can directly produce the magnetic force of mutual repulsion mutually between coil, rotor can be driven in rotation by permanent magnet and pedestal.

The through hole internal diameter of this pedestal is greater than the external diameter of axis of rotor rotation, and this through hole one end is established top bracing member, and the other end is for the cover plate combination that is provided with an axis hole, and the axis hole of this cover plate can pass through pivot joint for rotation axis, and top bracing member can supply rotation axis one end apical grafting.

This top bracing member has arc recess for the rotation axis apical grafting.

Be provided with bearing in the axis hole of this cover plate to support the rotation axis rotation.

This rotor has blade.

Characteristics of the present invention and advantage be, overcome that the volume of DC Brushless Motor structure can't effectively be reduced in the known technology, and the magnetic resistance that can have because of material itself, the defective that the rotary torsion of motor is reduced.Have less member, so it is simple in structure, convenient processing and manufacture.

DC Brushless Motor of the present invention can be made into smaller volume, makes it have the scope of application widely.

DC Brushless Motor of the present invention can directly form magnetic field generation magnetic force by coil electricity and produce the magnetic force of mutual repulsion mutually with the rotor permanent magnet of tool N.S magnetic pole, make rotor rotation, need not any magnetic conductive component and form magnetism guiding access, therefore magnetic resistance is reduced to minimumly, makes this DC Brushless Motor that preferred rotary torsion be arranged.

Description of drawings

Fig. 1 first embodiment of the present invention exploded perspective view;

The combination section of Fig. 2 first embodiment of the present invention;

Fig. 3 is along the 3-3 line profile of Fig. 2;

Fig. 4 second embodiment of the present invention exploded perspective view;

The combination section of Fig. 5 second embodiment of the present invention;

Fig. 6 is along the 6-6 line profile of Fig. 5;

Fig. 7 third embodiment of the present invention exploded perspective view;

The combination section of Fig. 8 third embodiment of the present invention;

Fig. 9 is along the 9-9 line profile of Fig. 8;

Figure 10 the present invention uses the situation figure as vibrating motor embodiment;

Figure 11 the present invention uses the situation figure as heat emission fan embodiment;

The exploded perspective view of first kind of known DC Brushless Motor structure of Figure 12;

The exploded perspective view of second kind of known DC Brushless Motor structure of Figure 13.

Accompanying drawing figure number explanation 1, pedestal 11, room 12, axis hole 13, bearing 14, fixture 15, coil 16, IC control piece 17, cover plate 171, axis hole 18, bearing 2, rotor 21, rotation axis 22, permanent magnet 23, pad 24, eccentric part 25, impeller 3, shell 4, pedestal 41, through hole 42, top bracing member 43, arc recess 44, fixture 45, coil 46, IC control piece 47, cover plate 471, axis hole 48, bearing 5, rotor 51, rotation axis 52, permanent magnet 53, fastener 54, blade

Embodiment

See also shown in the accompanying drawing, the present invention lifted following preferred embodiment be described as follows:

See also shown in Figure 1ly, be first preferred embodiment of the invention, mainly constituted by members such as a pedestal 1 and rotors 2.

Pedestal 1 is for having the cylindrical shell of a room 11, one end of this room 11 forms the open end, can hold to go into rotation for a rotor 2, and with a cover plate 17 cover caps, these room 11 other ends have an axis hole 12, in the middle of preferred embodiment, this axis hole 12 can be filled out wearing pieces such as establishing bearing 13 or axle sleeve, by of the rotation axis 21 one ends pivot joint rotation of this bearing 13 for rotor 2, be combined with at least two group coils 15 on the wall of pedestal 1 itself, in the middle of preferred embodiment, the wall of pedestal 1 is provided with at least two fixtures 14, this fixture 14 can be for sinking to the counterbore of this pedestal 1, or post as shown in the figure, be nested with respectively for coil 15 by this fixture 14, can rotate purpose for reaching rotor 2, pedestal 1 is provided with IC control pieces 16 such as known drive circuit and hall sensing element, and this IC control piece 16 is electrically connected with coil 15; Cover plate 17 has an axis hole 171, and in the middle of preferred embodiment, this axis hole 171 can be filled out wearing pieces such as establishing bearing 18 or axle sleeve.

Rotor 2 is provided with the permanent magnet 22 of tool N.S magnetic pole by a rotation axis 21, these rotation axis 21 2 ends are articulated in axis hole 12, the 171 interior rotations of pedestal 1 and cover plate 17 respectively, in case of necessity, two ends of this rotation axis 21 can be nested with a pad 23 respectively, avoiding the direct friction of permanent magnet 22 and pedestal 1 or cover plate 17, and rotation axis 21 and can be projecting inward by the axis hole 12,171 of pedestal 1 or cover plate 17.

See also shown in Fig. 2,3, be the first preferred embodiment combination situations of the present invention, pedestal 1 is established fixture 14 by the wall of itself, be combined with coil 15 on it, and be equipped with rotor 2 in the room of this pedestal 1, and the open end of this pedestal 1 is combined with a cover plate 17, and rotation axis 21 2 ends of rotor 2 are articulated in the axis hole 12,171 of pedestal 1 and cover plate 17 respectively.Therefore, can monitor by this IC control piece 16 rotor 2 permanent magnet 22 polarity variation and send signal, also can distinguish the magnetic field of conversion formation opposed polarity and produce magnetic force to control these two groups of coils 15, this magnetic force can promote permanent magnet and rotate, and makes rotor 2 obtain to continue rotation.

See also shown in Figure 4; be second preferred embodiment of the present invention; this pedestal 1 outer wall further is provided with at least one rib 19; and the wall of this pedestal 1 is provided with at least two fixtures 14 with combination at least two group coils 15; pedestal 1 and in conjunction with an IC control piece 16, more with a shell 3 cover cap in addition, shell 3 more can be for a cover plate 17 in conjunction with (seeing also shown in Fig. 5,6); therefore, these two groups of coils 15 and IC control piece 16 can be by shell 3 covering protections.

See also shown in Figure 7ly, be third preferred embodiment of the invention, constituted by members such as a pedestal 4, rotors 5.

Pedestal 4 has a through hole 41, this through hole 41 can be the axis hole that articulates rotation for the rotation axis 51 of rotor 5, in the middle of preferred embodiment, this through hole 41 can form the hole greater than rotation axis 51 external diameters, and through hole 41 1 ends can supply a cover plate 47 combinations, and this cover plate 47 has an axis hole 471 can support rotation axis 51 rotations.In the middle of preferred embodiment, this axis hole 471 can fill for bearing 48 or wearing piece etc.; Pedestal 4 end in addition can be for the rotation axis 51 1 end apical graftings of rotor 5.In the middle of preferred embodiment, the top bracing member 42 that this can be made for wear-resistant material by the apical grafting end, and this top bracing member 42 more can establish recessed arc recess 43, can support rotor 5 position rotating preferably by this arc recess 43; Pedestal 4 walls own are provided with at least two fixtures 44, and this two fixture 44 can be for two groups of coils 45 respectively in conjunction with the location.Pedestal 4 is combined with an IC control piece 46, and this IC control piece includes drive circuit and hall sensing element, and this IC control piece 46 is electrically connected for 45 one-tenth with two groups of coils.

Rotor 5 central portions are established a rotation axis 51, this rotation axis 51 can pass through the axis hole 471 and the bearing 48 of cover plate 47, and rotation axis 51 other end apical graftings are at top bracing member 42 or its arc recess 43 of pedestal 4, this rotor 5 is had than stable rotation, and rotor 5 is established the permanent magnet 52 of a ring tool N.S magnetic pole, and this permanent magnet 52 can be looped around all sides of pedestal 4, in case of necessity, this rotor 5 can be established blade 54, therefore, can drive air-flow during these rotor 5 rotations and form a heat emission fan.

See also Fig. 8, shown in 9, combination situations for third preferred embodiment of the invention, the rotation axis 51 of rotor 5 passes through the axis hole 471 of cover plate 47 and bearing 48 and passes through and connect, and by fastener 53 snappings such as C shape rings, rotation axis 51 other end apical graftings are at top bracing member 42 or its arc recess 43 of pedestal 4, make this rotor 5 can become stable rotation, the permanent magnet 52 of rotor 5 is looped around all sides of pedestal 4, and correspondence is being arranged at coil 45 peripheral position of pedestal 4 all sides, therefore, this rotor 5 with the permanent magnet 52 of tool N.S magnetic pole with pass to electric current and can form coil 45 mutual repulsion mutually that magnetic field produces magnetic force, rotor 5 can be driven in rotation.

See also shown in Figure 10ly, after this DC Brushless Motor was combined, this protruded from the rotation axis 21 of cover plate 17 or pedestal 1, can make this DC Brushless Motor can form a vibrating motor in conjunction with an eccentric part 24.Perhaps as shown in figure 11, this DC Brushless Motor protrudes from the rotation axis 21 of cover plate 17 or pedestal 1 can be in conjunction with an impeller 25, and then this DC Brushless Motor can form the effect of heat emission fan.

DC Brushless Motor structure of the present invention has less member, and therefore, this DC Brushless Motor has simpler construction, and can be by processing and manufacturing easily.Because reduced the magnetic conductive component such as pole piece, metal central siphon of known DC Brushless Motor, the volume of this DC Brushless Motor also reduced relatively.And, because this DC Brushless Motor is directly produced magnetic force by the permanent magnet of coil and rotor repulsion, therefore, reduced therebetween by formed magnetism guiding access of magnetic conductive component such as pole piece, metal central siphons, the relative magnetic resistance that makes also is lowered, reduces, and makes this DC Brushless Motor that bigger rotary torsion can be arranged.

Though the present invention is disclosed as above by above preferred embodiment, be not in order to limit the present invention.To this area those of ordinary skill, the various variations of being done, only these change example, all should be included within design of the present invention and the protection range.

Claims

1, a kind of DC Brushless Motor structure is characterized in that: comprising:

2, DC Brushless Motor structure as claimed in claim 1, it is characterized in that: the axis hole of cover plate and room respectively is provided with bearing.

3, DC Brushless Motor structure as claimed in claim 1, it is characterized in that: the wall of pedestal is provided with fixture, and this fixture can be for coil in conjunction with the location.

4, DC Brushless Motor structure as claimed in claim 3 is characterized in that: the set fixture of the wall of this pedestal forms counterbore.

5, DC Brushless Motor structure as claimed in claim 3 is characterized in that: the post of fixture for protruding that the wall of this pedestal is set.

6, DC Brushless Motor structure as claimed in claim 1 is characterized in that: the rotation axis of this rotor respectively is arranged with a pad at permanent magnet two ends.

7, DC Brushless Motor structure as claimed in claim 1 is characterized in that: this base outer wall is established at least one rib of cloth.

8, DC Brushless Motor structure as claimed in claim 7, it is characterized in that: this base outer wall is arranged with a shell.

9, DC Brushless Motor structure as claimed in claim 8 is characterized in that: this shell one end can supply the cover plate combination.

10, DC Brushless Motor structure as claimed in claim 1 is characterized in that: this IC control piece includes a drive circuit and a hall sensing element.

11, DC Brushless Motor structure as claimed in claim 1 is characterized in that: an end of this axis of rotor rotation protrudes from cover plate.

12, DC Brushless Motor structure as claimed in claim 11 is characterized in that: this rotation axis that protrudes from cover plate is combined with an eccentric part.

13, DC Brushless Motor structure as claimed in claim 11 is characterized in that: this rotation axis that protrudes from cover plate is combined with an impeller.

14, a kind of DC Brushless Motor structure is characterized in that: comprising:

15, DC Brushless Motor structure as claimed in claim 14, it is characterized in that: the through hole internal diameter of this pedestal is greater than the external diameter of axis of rotor rotation, this through hole one end is established top bracing member, the other end is for the cover plate combination that is provided with an axis hole, the axis hole of this cover plate can pass through pivot joint for rotation axis, and top bracing member can supply rotation axis one end apical grafting.

16, DC Brushless Motor structure as claimed in claim 15 is characterized in that: this top bracing member has arc recess for the rotation axis apical grafting.

17, DC Brushless Motor structure as claimed in claim 15 is characterized in that: be provided with bearing in the axis hole of this cover plate to support the rotation axis rotation.

18, DC Brushless Motor structure as claimed in claim 14, it is characterized in that: the wall of this pedestal is provided with fixture, and this fixture can be for coil in conjunction with the location.

19, DC Brushless Motor structure as claimed in claim 18 is characterized in that: the set fixture of the wall of this pedestal forms counterbore.

20, DC Brushless Motor structure as claimed in claim 18 is characterized in that: the post of fixture for protruding that the wall of this pedestal is set.

21, DC Brushless Motor structure as claimed in claim 14 is characterized in that: this IC control piece includes a drive circuit and a hall sensing element.

22, DC Brushless Motor structure as claimed in claim 14, it is characterized in that: this rotor has blade.