CN216016551U - Electric machine - Google Patents

Abstract

The application provides a motor, wherein the motor comprises a rotor, a stator and a housing, the stator comprises a pair of split stator cores, the stator cores are symmetrically distributed on two sides of the rotor, each stator core comprises a winding part and an action part, the winding part and the action part are integrally formed, the winding part is formed by extending outwards in a protruding mode from the outer side surface of the action part, and the inner side surface of the action part faces the rotor; the case is disposed at an outer circumference of the stator, a winding space is formed between the case and the acting portion, and a coil is wound along the winding portion, expanded to both sides along the acting portion, and extended toward an inner wall of the case to form a pair of winding groups at both sides of the rotor.

Description

Electric machine

Technical Field

The application relates to the field of motors, in particular to a motor.

Background

The motor has wide application in the field of electric appliances. With the improvement of the social living standard, small electric appliances such as electric toothbrushes and electric beauty instruments are favored by more and more consumers. The working parts of such small electric appliances need to be driven by a motor to reciprocate for cleaning, massaging, etc. The angle, distance, frequency, stability, etc. of the reciprocating motion of the working member have an influence on the working effect. The performance of the motor is decisive for the working effect of the working parts.

Fig. 1 shows a stator core of a motor in the prior art, which is formed by integrally stamping silicon steel sheets, and includes an outer circumferential wall 10P and a pair of winding teeth 20P provided therein, and a rotor (not shown) is installed between the winding teeth 20P. A winding space 300P of the coil is defined between the winding teeth 20P and the outer peripheral wall 10P, and a space in which the coil extends outward is defined by the outer peripheral wall 10P, and the number of windings is limited. The way of increasing the winding space is to increase the volume of the stator core, but this way makes the whole volume of the stator assembled with the stator core change, which is not beneficial to the miniaturization of the motor. Alternatively, the winding teeth 20P are further extended toward the center to enlarge the space between the winding teeth 20P and the outer peripheral wall 10P, which results in a reduced space for the rotor, and the resultant motor after assembly has an undesirable output effect.

Therefore, the stator core cannot balance the relationship of increasing the winding space and reducing the overall size of the motor.

Another kind of stator core of prior art is U type stator core, and this kind of stator core is unilateral wire winding, and the wire winding space is big, but the rotor can't arrange between two parties in the motor, and the effect of exerting oneself is not compared the motor of arranging between two parties.

Therefore, a technique for solving the above problems is required.

SUMMERY OF THE UTILITY MODEL

An advantage of the present application is to provide a motor, the stator core of motor has great wire winding space, compact structure simultaneously, and whole small, it is strong to exert oneself the effect.

Another advantage of the present application is to provide a motor, a stator core of the motor is a split type symmetrical structure disposed on both sides of a rotor, a winding space is not limited, and more coils can be wound.

Another advantage of the present application is to provide a motor, a stator core of the motor includes a winding portion and an active portion, the winding portion and the active portion are integrally formed, along which a wound coil of the winding portion can be expanded along the active portion for winding a sufficient number of coils to enhance a force effect of the motor.

Another advantage of the present application is to provide a motor, the motor includes a pair of positioning members, the positioning members distribute in stator core's both ends, the location installation stator core.

Another advantage of the present application is to provide a motor, stator core with the setting element keeps away empty fixed connection, and the parcel is in certain space has between the shell in the stator outside, can twine abundant coil, guarantees the effect of exerting oneself of motor.

Another advantage of the present application is to provide an electric machine wherein the rotor is centrally disposed between the stator cores to ensure a force effect of the rotor.

Another advantage of the present application is to provide a motor, the rotor and the drive shaft are fixedly connected, an elastic member is installed at one end of the drive shaft, the elastic member assists the rotor to be arranged centrally to ensure the force effect of the rotor.

Other advantages and features of the present application will become more fully apparent from the following detailed description.

In accordance with one aspect of the present application, there is provided an electric machine comprising:

the rotor comprises a pair of magnetic steels, a pair of magnetic conducting plates and a driving shaft, wherein the magnetic steels are symmetrically distributed on the periphery of the driving shaft, and the magnetic conducting plates are symmetrically distributed on the periphery of the driving shaft and are respectively connected with the magnetic steels;

the stator comprises a pair of split stator cores, the stator cores are symmetrically distributed on two sides of the rotor, each stator core comprises a winding part and an action part, the winding parts and the action parts are integrally formed, the winding parts are formed by extending outwards in a protruding mode from the outer side surface of the action part, and the inner side surface of the action part faces the magnetic steel; and

a housing disposed at an outer circumference of the stator, forming a winding space between the housing and the acting portion, along which a coil is wound, expanded to both sides along the acting portion, and extended toward an inner wall of the housing to form a pair of winding groups at both sides of the rotor.

According to an embodiment of the present application, the inside surface of action portion is the plane, the outside surface of magnet steel is the plane to form evenly distributed's air gap between stator core and the rotor.

According to an embodiment of the present application, the wire winding portion is formed to extend perpendicularly outward from a center of an outer side surface of the acting portion.

According to one embodiment of the application, the outer side surface of the active portion is planar such that the coil extends outwardly in parallel along the outer side surface of the active portion.

According to an embodiment of the present application, the rotor further includes an elastic member disposed at one end of the driving shaft, the one end of the elastic member being fixed to the driving shaft to pull the driving shaft, wherein the elastic member is elastically deformed in at least two directions.

According to an embodiment of the present application, the motor further includes a first end cap, the first end cap is installed outside one end of the rotor, the other end of the elastic member is fixed in the first end cap, and the elastic member pulls the rotor to be located at a central shaft position of the motor.

According to an embodiment of the present application, the motor further includes a second end cap installed at an outer side of the other end of the rotor, the driving shaft passing through the second end cap.

According to an embodiment of the application, bearings are mounted between the first and second end caps and the drive shaft, respectively.

Drawings

Fig. 1 is a schematic view of a stator core of the prior art.

Fig. 2 is a schematic view of an electric machine according to a preferred embodiment of the present application.

Fig. 3 is a schematic view of an internal structure of a motor according to a preferred embodiment of the present application.

Fig. 4 is an exploded view of an electric machine according to a preferred embodiment of the present application.

Fig. 5 is a schematic sectional view of a partial structure of a motor according to a preferred embodiment of the present application.

Fig. 6 is a schematic diagram of the motion of a motor according to a preferred embodiment of the present application.

Detailed Description

The following description is presented to disclose the application and to enable any person skilled in the art to practice the application. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The embodiments of the application described below and illustrated in the drawings are intended to be examples only and are not intended to limit the application. Any variations or modifications may be made to the embodiments of the present application without departing from the principles described.

An electrical machine according to a preferred embodiment of the present application is disclosed and described in the following description with reference to the accompanying figures 2 to 6.

Compared with the traditional motor, the motor provided by the application has a more compact structure. The motor has a stator core of a split structure, the two sides of the rotor are symmetrically and separately arranged, an air gap which is uniformly distributed is formed between the surface of the stator core facing the rotor and the magnetic steel of the rotor, and a winding space is formed between the other side of the stator core and the shell of the motor for winding coils.

Compared with the motor in the prior art, the peripheral wall of the stator core is eliminated, so that the winding space is not limited by the peripheral wall of the stator core, but can be expanded outwards to the shell of the motor, the winding space is enlarged, and more coils can be wound. Simultaneously, the stator core of symmetrical arrangement for the rotor can arrange between stator core between placed in the middle, and the rotor receives symmetrical effort, strengthens the effect of exerting oneself of rotor.

Hereinafter, the motor provided in the present application will be described in detail.

For convenience of description, an extending direction of a driving shaft of the motor is defined as an axial direction, and a direction perpendicular to the axial direction is defined as a radial direction.

The motor comprises a rotor 10 and a stator 20, wherein the stator 20 is arranged outside the rotor 10. The stator 20 includes a pair of stator cores 21, the stator cores 21 are symmetrically distributed on two sides of the rotor 10, and the two stator cores have the same structure, shape, size and the like, and can be replaced with each other. The rotor 10 is arranged centrally within the stator 20.

Each of the stator cores 21 includes a winding portion 211 and an operating portion 212, and the winding portion 211 and the operating portion 212 are integrally formed. The winding portion 211 is formed to extend laterally from a middle position of an outer surface of the operating portion 22 by a predetermined distance.

An included angle is formed between the winding portion 211 and the acting portion 212. Preferably, the included angle is 90 °. That is, the winding portion 211 is perpendicular to the acting portion 212. Further, the winding portion 211 is perpendicular to a middle position of a side surface of the acting portion 212.

The acting portion 212 extends in a wide and long strip shape along the axial direction, and the length direction thereof is the axial direction. The winding portion 21 extends in a narrow and long strip shape along the axial direction, and the length direction thereof is the axial direction.

The stator 20 further includes a pair of winding groups 22, and each of the winding groups 22 is wound around each of the stator cores 21.

One end of the coil is wound around the winding portion 211 and is wound along the winding portion 211, and the winding group 22 is outwardly expanded along the acting portion 212. The width of the winding group 22 is defined by the width of the acting portion 212. When the width of the acting portion 212 is wide enough, the coil can be wound sufficiently to form the winding group 22 wide enough.

The stator 20 further includes a pair of positioning members 23, the positioning members 23 are symmetrically disposed on two sides of the rotor 20, and the stator core 21 is symmetrically installed between the two positioning members 23. The rotor 10 is arranged centrally between the stator core 21 and the positioning element 23.

The positioning element 23 is used for positioning and installing the stator core 21, and preventing the stator core 21 from deviating. The positioning member 23 positions an end of the stator core 21. The positioning piece 23 and the stator core 21 are fixed in a clearance manner.

For example, the positioning member 23 and the stator core 21 are positioned and installed, and a certain gap is formed between both ends of the stator core 21 and the positioning member 23. And injection molding is carried out on the positioning piece 23 and the stator core 21 after positioning and installation to form a whole. A plastic part can be formed by injection molding, the positioning piece 23 and the stator core 21 are mounted on the plastic part to form a whole, and the positioning piece 23 and the stator core 21 are connected and fixed in a clearance way.

The rotor 10 includes a pair of magnetic steels 11, a pair of magnetic conductive plates 12 and a driving shaft 13, the magnetic steels 11 and the magnetic conductive plates 12 are respectively and symmetrically installed on two sides of the driving shaft 13. The magnetic steel 11 is located between the magnetic conductive plates 12. The magnetic steel 11, the two ends of the magnetic conduction plate 12 and the driving shaft 13 are injected and molded to fix the magnetic steel 11, the magnetic conduction plate 12 and the driving shaft 13. The injection-molded portion is defined as the mounting portion 14. Wherein the mounting portion 14 may also be a plastic part, arranged at the drive shaft 13.

Further, the rotor 10 further includes an elastic member 15, the elastic member 15 is formed to extend a certain length from the mounting portion 14 at the end portion of the driving shaft 13 in an axial direction, and a supporting member 16 is provided at the end portion thereof.

The elastic member 15 is deformed in at least two directions. The supporting member 16 and the mounting portion 14 position both ends of the elastic member 15 to support the elastic member 15 to be restored to an opposite direction after being deformed to one direction.

The motor further includes a first end cap 30, a second end cap 40, and a housing 50. The first and second end caps 30 and 40 are mounted to both sides of the rotor 10, and the casing 50 is mounted to the outer circumference of the stator 20. The first end cap 30 and the second end cap 40 are each provided with a mounting channel. Wherein the support member 16 is installed in the installation passage of the first end cap 30 such that one end of the driving shaft 13 indirectly connected to the elastic member 15 and the support member 16 is fixed to the first end cap 30.

The other end of the driving shaft 10 passes through the mounting passage of the second end cap 40, and the stator 20 is located between the first end cap 30 and the second end cap 40.

Wherein the mounting channels of the first and second end caps 30, 40 are located at the center of the first and second end caps 30, 40, respectively, and extend in a central axial direction, such that the rotor 10 and the drive shaft 13 are positioned and mounted at the central axial position of the first and second end caps 30, 40, with the rotor 10 being centrally disposed and axially distributed along the central axis.

It will be understood by those skilled in the art that bearings are installed between the mounting passages of the first and second end caps 30 and 40 and the mounting portion 14, respectively, to support the movement of the driving shaft 13.

Wherein the support 16 is mounted in a bearing mounted at the first end cap 30,

the drive shaft 13 is located at the central axis of the motor, centrally located in the motor.

The structure of the stator 20 provided in the present application is further explained.

The stator cores 21 are symmetrically distributed on two sides of the rotor 10 in a split manner. The active portion 212 has an inner side surface 2121, and the inner side surface 2121 faces the rotor 10. The inside surface 2121 is planar.

Correspondingly, the outer side surface 111 of the magnetic steel 11 of the rotor 10 is a plane, so that air gaps with uniform gaps are distributed between the stator core 21 and the magnetic steel 11, so that the force generated by the interaction between the stator 20 and the rotor 10 is uniform.

The action part 212 extends straightly, so that the coil can expand outwards along the action part 212 in parallel, the coil is attached to the action part 21, the winding is regular, and the coil is not easy to fall off and loosen, so that the motor performance is stable.

Because stator core 21 is split type structure, and the periphery does not have the perisporium, and the winding space is not restricted by the perisporium, and relative integral type stator core with the same volume, the winding space is bigger, and the effect of exerting oneself that produces after the coil circular telegram is better from this.

The acting part 212 and the housing 50 form a winding space 200 therebetween, and the winding part 211 is distributed in the winding space 200. Compared with the traditional motor, the peripheral wall of the stator core is omitted, the outer edge of the winding space 200 extends to the shell from the peripheral wall of the stator core in an outward expansion mode, the space is greatly increased, the number of coils which can be wound is increased, the size of the formed winding group 22 is larger, and the force output effect of the motor is stronger. Meanwhile, the structure of the motor becomes more compact, and the size does not need to be enlarged, so that the purposes of increasing the winding space and keeping smaller size can be achieved simultaneously.

The application provides the effective wire winding space of motor is big, and the groove is full rate height, and it is effectual to exert oneself.

The present application further provides a method of manufacturing an electrical machine, the method comprising the steps of:

and providing a driving shaft, symmetrically and respectively installing a pair of magnetic steels and a pair of magnetic conduction plates around the driving shaft, and forming installation parts at two ends by injection molding between two ends of the magnetic steels and the magnetic conduction plates and the driving shaft so as to form a rotor.

Wherein, an elastic piece and a supporting piece are arranged on the mounting part at one end.

The utility model provides a pair of stator core and a pair of setting element, stator core is arranged between the setting element of symmetry setting by the symmetry, stator core with keep away empty fixed connection between the setting element, wherein to after the location stator core with the setting element is moulded plastics, forms a stator.

And winding a wire at a winding part of the stator core to form a winding group.

And mounting the stator on the outer side of the rotor, wherein the inner side surface of the stator iron core faces to the outer side surface of the magnetic steel.

A case is installed outside the stator, and the winding groups are arranged in a winding space formed between the winding part and the case.

And a bearing, a first end cover and a second end cover are arranged on the driving shaft to support the movement of the rotor. Wherein a support member at one end of the drive shaft is secured within the second end cap to pull the drive shaft in a central axis position of the motor.

Further, the movement mode of the motor provided by the application is explained.

After the coil is electrified, the action parts 212 on both sides of the rotor 10 respectively generate an N pole and an S pole, and the facing magnetic steels respectively generate an N pole and an S pole. Under the action of like-pole repulsion and opposite-pole attraction, the rotor 20 rotates clockwise for a certain angle, after the current direction is changed, the action parts 212 on the two sides respectively generate an S pole and an N pole, the rotor 20 rotates anticlockwise for a certain angle, and then the rotor 20 swings back and forth to enable the driving shaft 13 to vibrate along with the change of the current introduced by the coil and the direction of the current.

When the rotor 20 moves, the elastic member 15 shown in fig. 3 deforms in a corresponding direction with the rotation of the rotor 20 in one direction, and under the elastic force, the rotor 20 can be positioned at the central axis position of the motor, and the rotor 20 is prevented from shifting.

Since the end of the elastic member 15 is fixed to the central shaft of the motor, the initial position of the rotor 20 is the central shaft of the motor, the elastic member 15 can pull the rotor 20 to be kept at the central shaft of the motor without displacement when the rotor 20 moves, and the rotor 20 is kept at the central shaft of the motor to be oscillated under the support of the elastic member 15, so that the driving shaft 13 always moves in the center.

Finally, the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same, the technical features in the respective technical solutions may be modified or replaced, or combined with each other, and any technical solutions without departing from the principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. An electric machine, comprising:

a rotor;

the stator comprises a pair of split stator cores, the stator cores are symmetrically distributed on two sides of the rotor, each stator core comprises a winding part and an action part, the winding parts and the action parts are integrally formed, the winding parts are formed by extending outwards in a protruding mode from the outer side surface of the action part, and the inner side surface of the action part faces the rotor; and

a housing disposed at an outer periphery of the stator, a winding space formed between the housing and the acting portion, and the winding portion distributed in the winding space.

2. The motor as claimed in claim 1, wherein a coil is wound on the winding part to form winding groups on both sides of the rotor, respectively.

3. The motor as claimed in claim 2, wherein the winding part is formed to extend perpendicularly outwardly from a center of an outer side surface of the acting part.

4. The electric machine of claim 2, wherein the outside surface of the active portion is planar such that the coils extend outwardly in parallel along the outside surface of the active portion.

5. The electric machine of claim 1, wherein the rotor includes a pair of magnetic steels, a pair of magnetic conductive plates, and a drive shaft, the magnetic steels and the magnetic conductive plates being symmetrically mounted to the drive shaft, respectively, the magnetic conductive plates communicating with the magnetic steels.

6. The electric machine of claim 5 wherein the inside surface of the active portion is planar and the outside surface of the magnetic steel is planar to form evenly distributed air gaps between the stator core and the rotor.

7. The motor of claim 5, wherein the rotor further comprises an elastic member disposed at one end of the driving shaft, the elastic member having one end fixed to the driving shaft to pull the driving shaft, wherein the elastic member is elastically deformed in at least two directions.

8. The electric machine of claim 7 further comprising a first end cap, said first end cap mounted to an outside of one end of said rotor, the other end of said spring being secured within said first end cap, said spring pulling said rotor in a central axis of said electric machine.

9. The electric machine of claim 8 further comprising a second end cap mounted to the outside of the other end of the rotor, the drive shaft passing through the second end cap.

10. The electric machine of claim 9, wherein bearings are mounted between the first and second end caps and the drive shaft, respectively.

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