CN204013058U - A kind of brushless electric machine - Google Patents
A kind of brushless electric machine Download PDFInfo
- Publication number
- CN204013058U CN204013058U CN201420412614.6U CN201420412614U CN204013058U CN 204013058 U CN204013058 U CN 204013058U CN 201420412614 U CN201420412614 U CN 201420412614U CN 204013058 U CN204013058 U CN 204013058U
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- brake member
- rotating disk
- electric machine
- brushless electric
- drag ring
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Abstract
The utility model relates to a kind of brushless electric machine, it has stator, rotor and the circuit control panel in order to control commutation, motor has rotating shaft, it is characterized in that, drag ring and rotating disk are radially outward set respectively centered by rotating shaft, centrifugal brake member is set between drag ring and rotating disk, on centrifugal brake member, there is the face of conflicting with drag ring, rotating disk in be also provided with elastic component, elastic component produce elastic force act on respectively on brake member and rotating disk.Centrifugal brake member is applied on brushless electric machine, and the centrifugal effect that its brake member produces while being the rotation of dependence motor with separating of drag ring with combination completes, and therefore it is stronger with respect to traditional electric brake reliability, and brake structure is fairly simple.
Description
Technical field
The utility model relates to a kind of brushless electric machine, particularly has the brushless electric machine of mechanical brake structure.
Background technology
Brushless electric machine uses extensively, and in electric tool, often using brushless electric machine, example electric mower is as shown in Figure 1 exactly to use the power source of brushless electric machine as mower blade.Because the brake apparatus that it has the current brushless electric machine of environmental protection, advantage energy-conservation, low noise mostly is circuit control brake, the advantage of this kind of brake is that braking time is more accurate, realize than being easier to, but this brake is also higher to the requirement of electronic devices and components, once lost efficacy, motor " is killed ", the certification fee of software braking is higher in addition, time cycle is long, can not meet the cost requirement of manufacturing enterprise.
Utility model content
Provide a kind of brushless electric machine for addressing the above problem the utility model, it has stator, rotor, rotating shaft, housing and the circuit control panel in order to control commutation; Brushless electric machine also comprises brake structure, and this brake structure has drag ring, centrifugal brake member and rotating disk; Described drag ring and the end of housing are fixed, and described rotating disk is arranged on drag ring radial outer periphery, and rotating disk is synchronizeed and connected rotationally with rotating shaft; Described centrifugal brake member is accommodated in rotating disk, and centrifugal brake member has the face of conflicting with drag ring; In described rotating disk, be also provided with elastic component, one end of elastic component acts on rotating disk inside, and the other end of elastic component acts on described centrifugal brake member.
Preferably, center of turntable arranges slightly larger in diameter in the opening of drag ring diameter, and rotating disk is located at the outside of drag ring by opening sleeve.
Preferably, rotating disk is formed by upper cover and lower cover assembling, and rotating disk has the chamber of hollow, and described brake member is arranged in chamber.
Preferably, centrifugal brake member is roughly being oppositely arranged and forming centered by rotating shaft of arc brake member by two.
Preferably, brake member one end arranges the stake that can rotate around it, and the other end of brake member arranges a hole, and the stake of hole and another brake member is oppositely arranged, and spring is set as elastic component, and one end of spring is connected with the stake other end of linking springs and the hole of brake member.
Preferably, brake member centre position arranges elastic component, and the elastic force that elastic component produces acts on respectively on brake member and rotating disk.
Preferably, it is block that brake member is, and the mutually conflict identical with drag ring surface configuration of an end surfaces of brake member.
Preferably, the elastic force of elastic component acts on the described brake member other end.
Preferably, rotating shaft and rotating disk connect, rotating disk and rotating shaft synchronous rotary when machine operation.
The utility model can bring following technique effect with respect to the existing electric brake of brushless electric machine: centrifugal brake member is applied on brushless electric machine, the centrifugal effect that its brake member produces while being the rotation of dependence motor with separating of drag ring with combination completes, and therefore it is stronger with respect to traditional electric brake reliability.Brake structure is fairly simple.
Brief description of the drawings
Fig. 1 is electric mower schematic diagram.
Fig. 2 is the perspective view of embodiment 1 motor and brake structure.
Fig. 3 is embodiment 1 motor and brake structure cross section view.
Fig. 4 is the perspective view of embodiment 2 motors and brake structure.
Fig. 5 is the perspective view of embodiment 3 motors and brake structure.
Embodiment
Below in conjunction with accompanying drawing, the technical solution of the utility model is described further.
With reference to the electric mower 1 shown in Fig. 1, it comprises that main part 11, roller 12, operation handrail 13, described roller 12 are arranged in main part, the inside of main part 11 comprises that brushless electric machine 2(is not shown), the rear portion of main part 11 is provided with grass box 14 for carrying the grass bits under cutting, on described operation handrail, is also provided with the console switch for controlling hay mover work.
With reference to the motor shown in Fig. 2 and Fig. 3, comprise body 21, the bottom that is positioned at body is provided for the base 22 of fixed electrical machinery, and base periphery arranges multiple projections 23 with screw hole 231.Base 22 is one-body molded with casing 24, the center of motor is provided with rotating shaft 25, at the outer drag ring 26 that encloses of rotating shaft, the fixed part 262 that described drag ring has an annular element 261 and is wholely set with annular element, fixed part and motor case 24 are fixedly installed, and drag ring 26 is fixed on the upper end of casing.The diameter of drag ring 26 is roughly 1/2 of motor case.Described drag ring adopts comparatively conventional manganese steel to make.
The periphery of drag ring 26, sheathed rotating disk 27, rotating disk is assembled by upper cover 271 and lower cover 272, and lower cover centre position is provided with slightly larger in diameter in the circular open 273 of drag ring 26.Together with upper cover 271 connects with lower cover 272 time, in rotating disk, form a cavity 274, the major part of above-mentioned drag ring 26 is all positioned at the cavity 274 of rotating disk, also be provided with the screw pole 275 for fixed cover and lower cover in the periphery of lower cover, corresponding with screw pole 275 is provided with screw hole 276 upper covering.Be provided with machine shaft 25 installing holes 277 in the central authorities of upper cover, machine shaft symmetry be provided with two cambered surfaces 252 and two planes 251 (referring to Fig. 4), the shape of installing hole 277 and motor shaft adapt to be provided with two cambered surfaces and two planes.Described rotating disk lower cover 272 is fixed by screw with upper cover 271, and the upper cover of rotating disk is supported by machine shaft 25, and lower cover gab 273 slightly larger in diameter are in the diameter of drag ring 26.Drag ring 26 is with the part of lower cover 272 openings in non-contacting state, and the base of the bottom of lower cover 272 and drag ring 26 exists certain distance, and the bottom of lower cover 272 does not similarly contact with drag ring 26.Like this, in the time that motor shaft 25 drives rotating disk 25 to rotate, rotating disk can not produce friction with drag ring 26.
So, when motor shaft rotation, can drive rotating disk 27 synchronous rotaries, in the cavity 274 of rotating disk 27, be provided with brake member 28, this brake member 28 is arc, and brake member 28 adopts conventional carbon steel to make.One end of brake member 28 is arranged in the stake 29 being arranged in cavity by hole, and stake is wholely set with lower cover 272, and stake 29 can be to be also fixed on lower cover 272 by securing member, and brake member can rotate along certain angle around described stake.In described stake 29, be also provided with the spring eye 291 for hook spring 30, the other end of brake member is provided with and is also provided with spring eye 291, between two spring eyes 291, spring 30 is set, together with the spring eye 291 of a brake member is hooked in the stake of another brake member by spring 30.
The middle part of brake member 28 is circular arc, and itself and drag ring 26 are fitted, and now motor 1 is in braking state, and motor 1 centrifugal brake member in the time of non operating state is pressed on drag ring 26 under the effect of spring 30.When rotating disk after electric motor starting 27 is along with motor shaft 26 synchronous rotaries, similarly also rotation thereupon of centrifugal brake member 28, when the elastic force that reaches the generation of spring 30 minimum deformation when rotating speed is not enough to provide the required centripetal force of centrifugal brake member 28, rotating speed is now also self-stopping critical whirling speed, the size of critical whirling speed can be adjusted by the elastic force of regulating spring, centrifugal brake member 28 starts outwards to rotate around stake 29, no longer fit with drag ring 26 in the middle part of centrifugal brake member, motor is in non-braking state.In the time that motor power-off is slowed down from operating state, centrifugal brake member is gradually near drag ring 26, and when rotating speed is reduced to critical whirling speed, the arch sections in the middle of centrifugal brake member 28 are fitted on drag ring 26 now motor 1 and start brake, until motor 1 stops operating.
Embodiment bis-
Different from embodiment mono-referring to the centrifugal brake member of Fig. 4, have one radially outer protrudingly 281 at the back of arc centrifugal brake member, one end of spring 30 ' is set in projection 281.Under the rotating disk of protruding radial outside, cover and be provided with radially inner protrudingly 282, the other end of spring is set in the projection 282 that rotating disk lower cover arranges.Motor 1 is in the time of non operating state, and elastic force makes centrifugal brake member conflict drag ring 26.
Embodiment tri-
Different from embodiment mono-referring to the centrifugal brake member of Fig. 5, on the lower cover 272 of rotating disk, be provided with two axially grooved 278 structures of symmetry, trench structure is formed by two arms 279, and the end of described wall 279 extends to lower cover outer rim.The interior brake shoes 280 that arranges of trench structure 278, brake shoes is rectangular structure roughly, and brake shoes is circular arc the surface laminating with drag ring near the one side of drag ring.The rear portion of brake shoes arranges spring, and motor 1 is in the time of non operating state, and brake shoes is close on drag ring 26.When machine operation, brake shoes slides backward along with turntable rotation and along chute, and brake shoes and drag ring depart from.
The utility model is applied in centrifugal brake member on brushless electric machine, and the centrifugal effect that its brake member produces while being the rotation of dependence motor with separating of drag ring with combination completes, and therefore it is stronger with respect to traditional electric brake reliability.Brake structure is fairly simple.
Above-described embodiment is the utility model preferred embodiment, but protection range of the present utility model is not limited to this.All changes of doing according to the connotation of the utility model claim and equivalence are replaced all in protection range of the present utility model.
Claims (9)
1. a brushless electric machine, it has stator, rotor, rotating shaft, housing and the circuit control panel in order to control commutation; It is characterized in that, brushless electric machine also comprises brake structure, and this brake structure has drag ring, centrifugal brake member and rotating disk; Described drag ring and the end of housing are fixed, and described rotating disk is arranged on drag ring radial outer periphery, and rotating disk is synchronizeed and connected rotationally with rotating shaft; Described centrifugal brake member is accommodated in rotating disk, and centrifugal brake member has the face of conflicting with drag ring; In described rotating disk, be also provided with elastic component, one end of elastic component acts on rotating disk inside, and the other end of elastic component acts on described centrifugal brake member.
2. a kind of brushless electric machine as claimed in claim 1, is characterized in that, described center of turntable arranges slightly larger in diameter in the opening of drag ring diameter, and rotating disk is located at the outside of drag ring by opening sleeve.
3. a kind of brushless electric machine as claimed in claim 2, is characterized in that, described rotating disk is formed by upper cover and lower cover assembling, and rotating disk has the chamber of hollow, and described brake member is arranged in chamber.
4. a kind of brushless electric machine as claimed in claim 3, is characterized in that, described centrifugal brake member is roughly being oppositely arranged and forming centered by rotating shaft of arc brake member by two.
5. a kind of brushless electric machine as claimed in claim 4, it is characterized in that, described brake member one end arranges the stake that can rotate around it, the other end of brake member arranges a hole, the stake of hole and another brake member is oppositely arranged, spring is set as elastic component, one end of spring is connected with the stake other end of linking springs and the hole of brake member.
6. a kind of brushless electric machine as claimed in claim 5, is characterized in that, in described brake member centre position, elastic component is set, and the elastic force that elastic component produces acts on respectively on brake member and rotating disk.
7. a kind of brushless electric machine as claimed in claim 3, is characterized in that, it is block that described brake member is, and the mutually conflict identical with drag ring surface configuration of an end surfaces of brake member.
8. a kind of brushless electric machine as claimed in claim 7, is characterized in that, the elastic force of described elastic component acts on the described brake member other end.
9. a kind of brushless electric machine as claimed in claim 1, is characterized in that, described rotating shaft and rotating disk connect, rotating disk and rotating shaft synchronous rotary when machine operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420412614.6U CN204013058U (en) | 2014-07-25 | 2014-07-25 | A kind of brushless electric machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420412614.6U CN204013058U (en) | 2014-07-25 | 2014-07-25 | A kind of brushless electric machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204013058U true CN204013058U (en) | 2014-12-10 |
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ID=52052997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420412614.6U Active CN204013058U (en) | 2014-07-25 | 2014-07-25 | A kind of brushless electric machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204013058U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105391240A (en) * | 2015-12-29 | 2016-03-09 | 苏州汉实汽车机械有限公司 | Automatic rotating disc |
-
2014
- 2014-07-25 CN CN201420412614.6U patent/CN204013058U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105391240A (en) * | 2015-12-29 | 2016-03-09 | 苏州汉实汽车机械有限公司 | Automatic rotating disc |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |