CN213402615U - Motor - Google Patents

Abstract

The utility model discloses a motor. The motor comprises a stator, a rotor, a first fixing piece, a second fixing piece and a rotating shaft. The rotor is arranged corresponding to the stator and comprises a body and a plurality of magnetic pieces, the body is provided with an outer ring surface, a first end surface, a second end surface and a channel, the channel enables the body to be in an annular column shape, the first end surface and the second end surface are positioned on two opposite sides of the body, and the magnetic pieces surround a plurality of limiting areas arranged on the outer ring surface; the first fixing piece and the second fixing piece are respectively connected with the first end face and the second end face; the rotating shaft passes through the first fixing piece, the second fixing piece and the channel of the body, and is connected with the body through the first fixing piece and the second fixing piece; wherein, an annular hollow part is formed between the body and the rotating shaft.

Description

Motor

Technical Field

The utility model relates to a motor.

Background

Motors are devices that convert electrical energy into mechanical energy, and are widely used in products of daily life, such as air conditioners, fans, washing machines, water pumps, disk drives, electric razors, …, and the like. Although motors are of a wide variety, the principle of their primary application is the electromagnetic effect. Generally, a motor includes a rotor magnet, a stator coil, and the like, and is roughly classified into an outer rotor motor and an inner rotor motor according to the arrangement relationship. In the case of an internal rotor motor, when a magnetic field generated by a current flowing into a stator coil interacts with a magnetic field of a rotor permanent magnet, the rotating shaft is rotated to apply work.

In the assembly process of the existing inner rotor motor, the permanent magnet is fixed on the rotor body by gluing through a tool, however, the glue needs time for curing, and the permanent magnet is positioned on the rotor body by the tool and then removed, so that before the glue is cured, the permanent magnet can be touched and displaced due to the removal of the tool, or displaced due to environmental vibration, or displaced due to other factors, and the distance between the permanent magnets is inconsistent, so that the magnetic field between the permanent magnet and the stator coil is not uniform, further the deflection amount during the rotation of the rotor is overlarge, the bearing can bear higher impact force due to vibration, and the motor is easily damaged during long-time operation. In addition, the internal mechanism of the motor forms a current loop under the condition that the rotating shaft and the rotor are not isolated, so that the rotating shaft is easy to generate current under the condition of motor operation, and further, a bearing is damaged to cause poor operation of the motor, and finally, a fault is caused.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a motor and a method for assembling a rotor structure thereof, which has a better characteristic (e.g., less jitter).

Another object of the present invention is to provide a motor and a method for assembling a rotor structure thereof, in which the inner structure thereof does not form a current loop, so as to ensure the normal operation of the bearing and prolong the life of the motor.

Another object of the present invention is to provide a motor and a method for assembling a rotor structure thereof, which can improve the stability and reliability of the motor operation, in addition to the advantage of easy assembly.

To achieve the above object, the present invention provides a motor, which includes:

a stator;

a rotor disposed corresponding to the stator, the rotor comprising:

a body, comprising:

an outer annular surface having a plurality of limiting regions;

a first end face and a second end face which are positioned at two opposite sides of the body; and

the channel penetrates through the first end face and the second end face to enable the body to be in an annular column shape; and

a plurality of magnetic bodies arranged in the limit areas;

one side surface of the first fixing piece is connected with the first end surface, and one side surface of the second fixing piece is connected with the second end surface; and

the rotating shaft penetrates through the first fixing piece, the second fixing piece and the channel and is connected with the body through the first fixing piece and the second fixing piece;

wherein, an annular hollow part is formed between the body and the rotating shaft.

In the motor, the first fixing member and the second fixing member respectively have a plurality of positioning portions arranged in a mirror image manner, and each two adjacent positioning portions of the first fixing member and each two adjacent positioning portions arranged in a mirror image manner on the second fixing member define the limiting regions on the outer annular surface.

In the above motor, the inner diameter of the passage of the body is larger than the diameter of the rotating shaft in the direction perpendicular to the long axis of the rotating shaft.

In the motor, the first fixing member and the second fixing member have a through hole respectively, and the first fixing member and the second fixing member are tightly fitted with the rotating shaft through the through hole.

The motor is characterized in that a first distance is formed between the first end surface and the second end surface in a direction parallel to the long axis of the rotating shaft, a second distance is formed between the side surface of the first fixing piece and the side surface of the second fixing piece, and the first distance is equal to the second distance.

In the above motor, a width of the annular hollow portion is equal to a distance between the side surface of the first fixing member and the side surface of the second fixing member in a direction parallel to the long axis of the rotating shaft.

In the above motor, the side surface of at least one of the first fixing member and the second fixing member has a first engaging structure, and the end surface of the body corresponding to the side surface has a second engaging structure corresponding to the first engaging structure.

In the above motor, at least one of the first fixing element and the second fixing element is locked to the corresponding end surface of the body through a locking element.

In the motor, the first fixing element and the second fixing element further include two connecting portions, each connecting portion is correspondingly connected to the peripheries of the first fixing element and the second fixing element, and the positioning portions are connected to the connecting portions, wherein the first fixing element, the second fixing element, the connecting portions and the positioning portions are integrally formed as a single component.

In the motor, the positioning portions of the first fixing member and the second fixing member cover the partial surfaces of the two adjacent magnetic members away from the body.

In view of the above, the present invention provides a motor and a method for assembling the same, wherein the motor and the rotor structure thereof are connected to the end faces of the body through the insulating assembly, and each magnetic member is located between two adjacent positioning portions, so that the magnetic members are positioned on the outer annular surface of the body through the positioning portions, and the magnetic members can be equidistantly disposed on the outer annular surface of the body. Therefore, the magnetic element can be limited and arranged on the outer ring surface of the body without displacement, so that the motor has the characteristic of better characteristics (for example, less possibility of shaking).

In addition, the positioning part in the insulating assembly of the present invention is the same as the positioning tool of the magnetic part in the prior art, so that the positioning tool in the assembling process can be omitted and the cost can be saved. Furthermore, the insulating component can not be removed, so that the magnetic component can be permanently limited on the rotor body, the magnetic component is not displaced by any factor, and further the intervals among all the magnetic components are the same, therefore, the uniform action of the magnetic field between the magnetic component and the stator winding can be ensured, and the stability and the reliability of the operation of the motor can be further improved.

In addition, the utility model discloses an insulating subassembly not only can be with the pivot indeed positioned the central point of rotor and put, outside making motor rotor structure have the advantage of easy equipment, because of having an annular well kenozooecium between rotor and pivot, so can more keep apart the body of pivot and rotor really when supporting the pivot, consequently, motor inner structure can not form the current loop, so can not form epaxial alternating voltage and electric current yet to can ensure the normal function of bearing, and then can improve the life-span of motor.

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments, but the present invention is not limited thereto.

Drawings

Fig. 1A is a schematic view of a motor according to an embodiment of the present invention;

FIG. 1B is a schematic assembled view of the rotor structure of the motor shown in FIG. 1A;

FIG. 1C is an exploded view of the rotor structure of the motor of FIG. 1B;

FIG. 1D is a partially exploded schematic view of the motor rotor structure of FIG. 1B;

FIG. 1E is a schematic cross-sectional view of the motor rotor structure of FIG. 1B along section line A-A;

fig. 2 and 3 are schematic views of the rotor structure of the motor according to different embodiments of the present invention;

fig. 4A is a schematic combination diagram of a motor rotor structure according to various embodiments of the present invention;

FIG. 4B is a cross-sectional view of the motor rotor structure of FIG. 4A taken along section line B-B;

FIG. 4C is a schematic perspective cross-sectional view of the motor rotor structure of FIG. 4A;

fig. 5 is a schematic flow chart illustrating an assembling method of the motor rotor structure according to the present invention.

Wherein the reference numerals

1: motor

2: stator

21: winding

3: rotor

31 main body

311 channel

312 end face

313 screw hole

314 outer annular surface

3141 the limiting region

32 magnetic part

3211 the first magnetic part

4,4a insulating assembly

4' positioning part

41 first fixing member

411,411a lateral side

4111 a first positioning part

4112 second positioning part

42 second fixing part

421 the first connecting part

4211 third positioning part

4212 fourth positioning part

422 the second connecting part

5: rotating shaft

6: shell

7: bearing

8, outer cover

A is an annular hollow part

A-A, B-B is a cut line

d1 first distance

d2 second distance

D1, D2 Direction

h is through hole

L is a horizontal extension line

O concave part

P is a convex part

S locking and fixing piece

S01, S02, S03, S04

Detailed Description

The method for assembling the motor and the rotor structure thereof according to the preferred embodiment of the present invention will be described with reference to the accompanying drawings, wherein like elements are described with like reference numerals.

Fig. 1A is a schematic view of a motor according to an embodiment of the present invention, fig. 1B is a combined schematic view of the motor rotor structure of fig. 1A, fig. 1C is an exploded schematic view of the motor rotor structure of fig. 1B, fig. 1D is a partially exploded schematic view of the motor rotor structure of fig. 1B, and fig. 1E is a cross-sectional schematic view of the motor rotor structure of fig. 1B along a secant line a-a.

As shown in fig. 1A to 1E, the motor 1 of the present invention is an inner rotor motor, which may include a stator 2, a rotor 3, an insulation assembly 4 and a rotating shaft 5. In addition, the motor 1 of the present embodiment further includes a housing 6, two bearings 7 and two covers 8. Here, as shown in fig. 1B, the combination of the rotor 3, the insulating member 4 and the rotation shaft 5 is defined as a motor rotor structure.

The stator 2 may include a plurality of windings 21 annularly assembled around, and the windings 21 of the stator 2 are disposed inside the housing 6 (fig. 1A).

The rotor 3 is provided at the center of the annular stator 2, and is provided corresponding to the stator 2 with a gap between the rotor 3 and the stator 2. The rotor 3 includes a body 31 and a plurality of magnetic members 32. When the windings 21 of the stator 2 interact with the magnetic field of the magnetic elements 32 of the rotor 3 due to the magnetic field generated by the current flowing through the windings, the motor rotor structure can rotate relative to the stator 2 to do work. The body 31 of the present embodiment is a rotor core, which may have an outer annular surface 314, a channel 311 and end surfaces 312 (fig. 1C). The channel 311 is located in the middle of the body 31 and penetrates the end surfaces 312, so that the body 31 is in an annular column shape, and the end surfaces 312 are located at two opposite sides of the body 31 and connected with the outer annular surface 314 of the body 31 (fig. 1E). In addition, the magnetic elements 32 may be permanent magnets, which are disposed around the outer annular surface 314 of the body 31.

The insulating member 4 is connected to the end surfaces 312 of the body 31. The insulating assembly 4 has a plurality of positioning portions 4 ', each magnetic element 32 is located between two adjacent positioning portions 4 ', and the positioning portions 4 ' enable the magnetic elements 32 to be positioned on the outer annular surface 314 of the main body 31. For example, as shown in fig. 1B and 1C, the positioning portions 4' include a first positioning portion 4111, a second positioning portion 4112, a third positioning portion 4211 and a fourth positioning portion 4212, wherein the first positioning portion 4111 is adjacent to the second positioning portion 4112, and the third positioning portion 4211 is adjacent to the fourth positioning portion 4212; the magnetic members 32 include a first magnetic member 3211, the first magnetic member 3211 is located between the first positioning portion 4111 and the second positioning portion 4112, and between the third positioning portion 4211 and the fourth positioning portion 4212, so that the first magnetic member 3211 can be located on the outer annular surface 314 of the body 31, and the rest of the positioning portions can be similar to each other. In other words, by the positioning effect of the two adjacent positioning portions 4', the magnetic members 32 can be accurately positioned on the body 31, and can be limited without displacement.

As shown in fig. 1C and fig. 1D, the insulation assembly 4 of the present embodiment includes a first fixing member 41 and a second fixing member 42, and the first fixing member 41 and the second fixing member 42 have the same structure and are correspondingly disposed on two opposite sides of the main body 31. The first fixing member 41 and the second fixing member 42 respectively have a side surface 411,411a facing the two end surfaces 312 of the body 31, and when the first fixing member 41 and the second fixing member 42 are connected to the body 31, the side surfaces 411,411a of the first fixing member 41 and the second fixing member 42 are correspondingly connected to the two end surfaces 312 of the body 31. In some embodiments, the side surfaces 411 and 411a of the first fixing element 41 and the second fixing element 42 can be connected to the two end surfaces 312 of the body 31 by, for example, adhesion or other connection methods, so as to mount the first fixing element 41 and the second fixing element 42 on the two opposite sides of the body 31, and further position the magnetic elements 32 by the positioning portion 4'. As shown in fig. 1E, in a long axis direction D1 (abbreviated as direction D1) parallel to the rotation axis 5, a first distance D1 is provided between the end surfaces 312 of the main body 31, a second distance D2 is provided between the side surfaces 411 and 411a of the first fixing element 41 and the second fixing element 42, and the first distance D1 and the second distance D2 are substantially equal. In other words, the first fixing element 41 and the second fixing element 42 are respectively tightly attached to the end surface 312 of the body 31.

In addition, the side edges of the first fixing element 41 and the second fixing element 42 of the present embodiment have a plurality of positioning portions 4 'arranged at equal intervals, the distance between two adjacent positioning portions 4' is the same as the width of the magnetic element 32, and the corresponding positioning portions 4 'on the first fixing element 41 and the second fixing element 42 are located on the same horizontal extension line, that is, the positioning portions 4' on the first fixing element 41 and the second fixing element 42 are arranged in a mirror-image one-to-one manner with respect to the main body 31. For example, the first positioning portion 4111 of the first fixing element 41 and the third positioning portion 4211 of the second fixing element 42 are on a horizontal extension line (not shown), the second positioning portion 4112 of the first fixing element 41 and the fourth positioning portion 4212 of the second fixing element 42 are on another horizontal extension line L (fig. 1D), that is, the first positioning portion 4111 and the third positioning portion 4211 are arranged in a mirror image, the second positioning portion 4112 and the fourth positioning portion 4212 are arranged in a mirror image, and the other positioning portions are arranged in the same way. Each two adjacent positioning portions of the first fixing member 41 and each two adjacent positioning portions arranged in the second fixing member 42 in a mirror image form a plurality of limiting regions defined by the outer annular surface 314 of the body 31, so that the magnetic elements 32 are arranged in the limiting regions without displacement. For example, as shown in fig. 1C and 1D, the first positioning portion 4111, the second positioning portion 4112, the third positioning portion 4211 and the fourth positioning portion 4212 may define a limiting region 3141 on the outer annular surface 314, that is, each two adjacent positioning portions 4 'of the first fixing member 41 and each two adjacent positioning portions 4' arranged on the second fixing member 42 in a mirror image manner define a limiting region 3141 on the outer annular surface 314, and a distance between the first positioning portion 4111 and the second positioning portion 4112 is the same as a width of the first magnetic member 3211, and a distance between the third positioning portion 4211 and the fourth positioning portion 4212 is the same as a width of the first magnetic member 3211, so that the first magnetic member 3211 is arranged on the limiting region 3141 on the outer annular surface 314 without displacement, and the other positioning portions are also analogized.

In other words, the positioning portions 4 'are disposed at equal intervals, so that the magnetic elements 32 can be disposed at equal intervals on the outer annular surface 314 of the main body 31, that is, the intervals between all the magnetic elements 32 are the same (the interval is the thickness of the positioning portion 4' along the direction perpendicular to the long axis of the rotating shaft 5), thereby ensuring uniform magnetic field action between the magnetic elements 32 of the rotor 3 and the windings 21 of the stator 2, and further improving the stability and reliability of the operation of the motor 1. The first fixing element 41 and the second fixing element 42 of the present embodiment are an insulating element, which can be formed integrally by, for example, but not limited to, plastic, rubber or resin, or a metal externally coated with an insulating material such as plastic, rubber or resin.

The shaft 5 passes through the insulating member 4 and the passage 311 of the body 31, and the shaft 5 is connected to the body 31 through the insulating member 4. As shown in fig. 1C, the rotating shaft 5 of the present embodiment sequentially passes through the first fixing member 41, the channel 311 of the body 31 and the second fixing member 42, so that the rotor 3 is sandwiched between the first fixing member 41 and the second fixing member 42. The first fixing member 41 and the second fixing member 42 respectively have a through hole h, the rotating shaft 5 passes through the through hole h, and the first fixing member 41 and the second fixing member 42 can be tightly matched with the rotating shaft 5 through the through hole h. Here, the tight fit means that the diameter of the rotating shaft 5 is substantially equal to the inner diameter of the through hole h of the first fixing member 41 and the second fixing member 42, and the two are tightly fitted and connected and cannot rotate relatively.

In addition, referring to fig. 1E again, in the direction D1 (i.e. the direction D2) perpendicular to the long axis of the rotating shaft 5, the inner diameter of the channel 311 of the main body 31 is larger than the diameter of the rotating shaft 5. In other words, the shaft 5 passes through the passage 311 of the body 31 without contacting the passage wall, and an annular hollow portion a is formed therebetween. Therefore, the shaft 5 and the body 31 are not directly connected, but indirectly connected through the insulating member 4 (including the first fixing member 41 and the second fixing member 42). Therefore, when the rotor 3 rotates relative to the stator 2, the rotor 3 drives the rotating shaft 5 to rotate together through the insulation component 4. In addition, in the longitudinal direction D1 parallel to the rotating shaft 5, the width of the annular hollow portion a is substantially equal to the distance between the two side surfaces 411 and 411a of the first fixing element 41 and the second fixing element 42 (the width of the annular hollow portion a is also substantially equal to the distance between the two end surfaces 312 of the body 31), which means that the first fixing element 41 and the second fixing element 42 do not enter the passage 311 of the body 31.

In addition, referring to fig. 1A, two outer covers 8 of the present embodiment are correspondingly covered on two opposite sides of the housing 6 and are respectively and tightly fitted with the bearings 7, and each bearing 7 is correspondingly disposed on each outer cover 8 and located on two opposite sides of the rotor 3 and is tightly fitted with the rotating shaft 5.

In view of the above, in the motor 1 of the embodiment, the insulating element 4 (including the first fixing element 41 and the second fixing element 42) is connected to the end surfaces 312 of the main body 31, and each magnetic element 32 is located between two adjacent positioning portions 4 ', so that the magnetic elements 32 can be positioned on the outer annular surface 314 of the main body 31 by the structural design of the positioning portions 4', and the magnetic elements 32 can be equidistantly disposed on the outer annular surface 314 of the main body 31. Therefore, the magnetic elements 32 can be accurately and equidistantly disposed on the outer annular surface 314 of the body 31, so that the motor 1 has a better characteristic. For example, the magnetic field generated by the winding 21 of the stator 2 and the magnetic field interaction between the magnetic members 32 of the rotor 3 can be relatively uniform, so that the deflection of the rotor structure of the motor 1 is not too large and is less prone to shake when the motor 1 rotates at a high speed, thereby prolonging the service life of the motor 1.

In addition, in the conventional motor, due to the positions and/or gaps of the stator winding and the rotor magnetic member, the gap between the stator and the rotor, and the like, the rotating shaft inevitably rotates in an incompletely symmetrical magnetic field, so that an alternating voltage may be generated at two ends of the rotating shaft, and further an alternating current is generated, and high temperature generated by partial discharge of the alternating current may melt many micro areas on an inner ring, an outer ring or balls of the bearing to form grooves, so that abnormal sound and vibration are generated during the rotation of the motor, and further the bearing fails to work, thereby causing the motor to fail and damage.

Therefore, in the motor 1 of the embodiment, by the structural design that the insulating element 4 (including the first fixing element 41 and the second fixing element 42) is connected to the end surfaces 312 of the body 31, the rotating shaft 5 is connected to the body 31 through the insulating element 4, and the annular hollow portion a is formed between the rotating shaft 5 and the body 31, the rotating shaft 5 can be reliably positioned at the center of the rotor 3, and the rotating shaft 5 is supported and the rotating shaft 5 and the body 31 of the rotor 3 are reliably isolated (the annular hollow portion a is formed between the two), so that the internal mechanism of the motor 1 does not form a current loop, and thus, the alternating voltage and current at the two ends of the rotating shaft 5 are not formed, thereby ensuring the normal operation of the bearing 7, and further improving the service life of the motor 1.

Fig. 2 and fig. 3 are schematic diagrams of motor rotor structures according to different embodiments of the present invention, respectively, fig. 4A is a combination schematic diagram of motor rotor structures according to different embodiments of the present invention, fig. 4B is a schematic cross-sectional view of the motor rotor structure of fig. 4A along a section line B-B, and fig. 4C is a schematic cross-sectional perspective view of the motor rotor structure of fig. 4A.

As shown in fig. 2, the motor rotor structure of the present embodiment is substantially the same as the motor rotor structure of the previous embodiment (as shown in fig. 1C) in terms of the component composition and the connection relationship of the components. The difference is that in the rotor structure of the motor of the present embodiment, the side surfaces 411 and 411a of the first fixing element 41 and the second fixing element 42 respectively have at least one first engaging structure, and the end surface 312 of the main body 31 has a second engaging structure corresponding to the first engaging structure. In this embodiment, the first engaging structure may be a protrusion P, and the second engaging structure may be a recess O. Therefore, when the first fixing member 41 or the second fixing member 42 is assembled with the body 31, the first fixing member 41 or the second fixing member 42 can be connected to both end surfaces 312 of the body 31 by inserting the convex portions P into the concave portions O, respectively. In this embodiment, the first fixing element 41 and the second fixing element 42 respectively have two protrusions P inserted into the two recesses O, but the number of the first engaging structures and the number of the second engaging structures are only examples, and in different embodiments, the number of the first engaging structures and the number of the second engaging structures may be different. In addition, the positions of the first engaging structure and the second engaging structure can be reversed, that is, the side surfaces 411 and 411a of the first fixing member 41 and the second fixing member 42 can have the concave portion O, and the two end surfaces 312 of the body 31 can have the convex portion P corresponding to the concave portion O, which is not limited by the present invention.

As shown in fig. 3, the motor rotor structure of the present embodiment is substantially the same as the motor rotor structure of the previous embodiment in terms of the component composition and the connection relationship of the components. The difference is that the motor rotor structure of the present embodiment further includes at least one locking member S, the locking member S is disposed through the first fixing member 41 and the second fixing member 42, and the end surface 312 of the body 31 has a screw hole 313 corresponding to the locking member S, so that the first fixing member 41 and the second fixing member 42 can be locked on the end surface 312 of the body 31 through the corresponding locking member S. In this embodiment, 4 locking pieces S are taken as an example, two of the locking pieces S are correspondingly inserted through the first fixing piece 41 and connected to the end surface 312 of the body 31, and the other two of the locking pieces S are correspondingly inserted through the second fixing piece 42 and connected to the other end surface 312 of the body 31. In some embodiments, the locking member S is, for example, but not limited to, a screw or bolt.

As shown in fig. 4A, 4B and 4C, the motor rotor structure of the present embodiment is substantially the same as the motor rotor structure of the previous embodiment in terms of the component composition and the connection relationship of the components. The difference is that in the rotor structure of the motor of the present embodiment, in addition to the first fixing element 41 and the second fixing element 42, the insulation assembly 4a of the present embodiment further includes a first connection portion 421 and a second connection portion 422, and the first connection portion 421 and the second connection portion 422 are respectively disposed corresponding to the first fixing element 41 and the second fixing element 42. The first connecting portion 421 and the second connecting portion 422 are respectively annular and correspondingly connected to the peripheries of the first fixing element 41 and the second fixing element 42, and the positioning portions 4' are connected to the first connecting portion 421 and the second connecting portion 422. Herein, the first connecting portion 421 and the second connecting portion 422 are correspondingly connected to the first fixing element 41 and the second fixing element 42, the first connecting portion 421 and the second connecting portion 422 also cover two opposite side surfaces of the magnetic elements 32, and the positioning portion 4' is correspondingly connected to the first connecting portion 421 and the second connecting portion 422 and covers all or part of the surface of the magnetic elements 32 away from the body 31.

In the present embodiment, the first fixing element 41, the second fixing element 42, the first connecting portion 421, the second connecting portion 422, the positioning portion 4 'at the outer edge of the first fixing element 41 and the positioning portion 4' (i.e. the insulating element 4a) at the outer edge of the second fixing element 42 are a single integrally formed component, but not limited thereto, in some embodiments, at least one of the first fixing element 41 and the second fixing element 42, the first connecting portion 421, the second connecting portion 422, the positioning portion 4 'at the outer edge of the first fixing element 41 and the positioning portion 4' at the outer edge of the second fixing element 42 may be an independent component, and may be connected together by using, for example, adhesion, locking, or embedding. In some embodiments, the positioning portion 4 'at the outer edge of the first fixing member 41 and the positioning portion 4' at the outer edge of the second fixing member 42 may not be connected to each other, which is not limited by the present invention. In some embodiments, the insulating element 4a may be, for example, but not limited to, a plastic injection member.

In addition, please refer to fig. 1A to fig. 1E in combination with fig. 5 to describe an assembly method of a motor rotor structure according to an embodiment of the present invention. Fig. 5 is a schematic flow chart of an assembling method of the motor rotor structure according to the present invention.

The assembling method of the motor rotor structure of the present embodiment at least includes the following steps S01 to S04.

Step S01 is: providing a body 31, wherein the body 31 has a channel 311 and an end surface 312, the channel 311 penetrates the end surface 312 to make the body 31 in an annular column shape, and the end surfaces 312 are located at two opposite sides of the body 31.

Step S02 is: providing an insulating element 4, connecting the insulating element 4 with the end surfaces 312 of the body 31, wherein the insulating element 4 has a plurality of positioning portions 4'. In this embodiment, the positioning portion 4' at least includes a first positioning portion 4111, a second positioning portion 4112, a third positioning portion 4211 and a fourth positioning portion 4212, and the insulating assembly 4 includes a first fixing member 41 and a second fixing member 42, where the first fixing member 41 and the second fixing member 42 respectively have side surfaces 411 and 411a facing the two end surfaces 312 of the body 31. In addition, the assembling method further comprises the following steps: the first fixing element 41 and the second fixing element 42 are correspondingly located at two opposite sides of the main body 31, and are respectively connected with the two end surfaces 312 of the main body 31 through the side surfaces 411 and 411a of the first fixing element 41 and the second fixing element 42. The first positioning portion 4111 of the first fixing member 41 and the third positioning portion 4211 of the second fixing member 42 are located on a horizontal extension line; similarly, the second positioning portion 4112 on the first fixing member 41 and the fourth positioning portion 4212 on the second fixing member 42 are also located on the other horizontal extension line L, and so on. In addition, in the longitudinal direction D1 parallel to the rotating shaft 5, a first distance D1 is provided between the end surfaces 312 of the main body 31, a second distance D2 is provided between the side surfaces 411 and 411a of the first fixing member 41 and the second fixing member 42, and the first distance D1 is substantially equal to the second distance D2. In addition, an annular hollow portion a may be formed between the body 31 and the rotating shaft 5, and a width of the annular hollow portion a is substantially equal to a distance between the side surfaces 411 and 411a of the first fixing member 41 and the second fixing member 42 in a direction D1 parallel to the long axis of the rotating shaft 5.

Step S03 is: a plurality of magnetic elements 32 are provided, each magnetic element 32 is located between two adjacent positioning portions 4 ', and the magnetic elements 32 are further positioned on the outer annular surface 314 of the body 31 by the positioning portions 4'. In this embodiment, the magnetic member 32 includes a first magnetic member 3211, the first magnetic member 3211 is disposed in a limiting region 3141 defined by the first positioning portion 4111, the second positioning portion 4112, the third positioning portion 4211 and the fourth positioning portion 4212, so that the first magnetic member 3211 can be limited by the outer annular surface 314 of the body 31 without displacement, and the rest of the positioning portions can be analogized. Therefore, the magnetic element 32 can be accurately disposed on the outer annular surface 314 of the body 31, so that the motor 1 has better characteristics, and the stability and reliability of the operation of the motor 1 can be further improved.

Step S04 is: the shaft 5 is passed through the insulating member 4 and the passage 311 of the body 31, wherein the shaft 5 is connected to the body 31 through the insulating member 4. In the present embodiment, the insulation element 4 (including the first fixing element 41 and the second fixing element 42) is tightly fitted with the rotating shaft 5 through the through hole h. In addition, in the direction D1 perpendicular to the long axis of the rotating shaft 5 (i.e., the direction D2), the inner diameter of the passage 311 of the body 31 is larger than the diameter of the rotating shaft 5.

Therefore, in the present embodiment, by the structural design and assembly processes of the insulation assembly 4 (including the first fixing member 41 and the second fixing member 42), the rotor 3 and the rotating shaft 5, not only the rotating shaft 5 can be reliably positioned at the center position of the rotor 3, but also the assembly process of the rotor structure is relatively easy.

In addition, as shown in fig. 2, in some embodiments, the assembling method further includes: the convex portions P of the first fixing member 41 and the second fixing member 42 are inserted into the corresponding concave portions O of the body 31. Here, the side surfaces 411 and 411a of the first fixing element 41 and the second fixing element 42 have convex portions P, the two end surfaces 312 of the main body 31 have concave portions O corresponding to the convex portions P, and the first fixing element 41 and the second fixing element 42 are connected to the main body 31 by inserting the convex portions P into the corresponding concave portions O.

As shown in fig. 3, in some embodiments, the assembling method further includes: the first fixing member 41 and the second fixing member 42 are locked to the end surface 312 of the body 31 by the locking member S. Herein, the first fixing member 41 and the second fixing member 42 are respectively locked to the two end surfaces 312 of the body 31 by a plurality of locking members S.

As shown in fig. 4A to 4C, in some embodiments, in addition to the first fixing element 41 and the second fixing element 42, the insulation assembly 4A further includes a first connecting portion 421 and a second connecting portion 422, the first connecting portion 421 and the second connecting portion 422 are correspondingly connected to the peripheries of the first fixing element 41 and the second fixing element 42, and the positioning portions 4' are connected to the first connecting portion 421 and the second connecting portion 422. In some embodiments, the assembly method further comprises: each positioning portion 4' of the insulating assembly 4a covers a part of the surface of two adjacent magnetic members 32 away from the body 31. In some embodiments, the first fixing element 41, the second fixing element 42, the first connecting portion 421, the second connecting portion 422, the positioning portion 4 'on the outer edge of the first fixing element 41, and the positioning portion 4' (i.e., the insulating element 4a) on the outer edge of the second fixing element 42 may be a single component formed integrally.

In addition, other technical features of the assembling method of the motor rotor structure are described in detail above, and will not be described further herein.

In summary, in the assembly method of the motor and the rotor structure thereof of the present invention, the insulating assembly is connected to the end faces of the body, and each magnetic member is located between two adjacent positioning portions, so that the magnetic members can be equidistantly disposed on the outer annular surface of the body through the structural design that the positioning portions position the magnetic members on the outer annular surface of the body. Therefore, the magnetic element can be limited and arranged on the outer ring surface of the body without displacement, so that the motor has the characteristic of better characteristics (for example, less possibility of shaking).

In addition, the positioning part in the insulating assembly of the present invention is the same as the positioning tool of the magnetic part in the prior art, so that the cost is saved without the positioning tool. Furthermore, the insulating assembly is not removed, so the positioning part can permanently limit the magnetic part on the rotor body, the magnetic part is not displaced by any factor, any two adjacent magnetic parts are separated by the positioning part, and the distance between all the magnetic parts (namely the thickness of the positioning part) is the same, thereby ensuring the uniform action of the magnetic field between the magnetic part and the stator winding, and further improving the stability and the reliability of the operation of the motor.

In addition, the utility model discloses an insulating subassembly not only can be with the pivot indeed positioned the central point of rotor and put, outside making motor rotor structure have the advantage of easy equipment, because of having an annular well kenozooecium between rotor and pivot, so can more keep apart the body of pivot and rotor really when supporting the pivot, consequently, motor inner structure can not form the current loop, so can not form epaxial alternating voltage and electric current yet to can ensure the normal function of bearing, and then can improve the life-span of motor.

Naturally, the present invention can be embodied in many other forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be made by one skilled in the art without departing from the spirit or essential attributes thereof, and it is intended that all such changes and modifications be considered as within the scope of the appended claims.

Claims (10)

1. A motor, comprising:

a stator;

a rotor disposed corresponding to the stator, the rotor comprising:

a body, comprising:

an outer annular surface having a plurality of limiting regions;

a first end face and a second end face which are positioned at two opposite sides of the body; and

the channel penetrates through the first end face and the second end face to enable the body to be in an annular column shape; and

a plurality of magnetic bodies arranged in the limit areas;

one side surface of the first fixing piece is connected with the first end surface, and one side surface of the second fixing piece is connected with the second end surface; and

the rotating shaft penetrates through the first fixing piece, the second fixing piece and the channel and is connected with the body through the first fixing piece and the second fixing piece;

wherein, an annular hollow part is formed between the body and the rotating shaft.

2. The motor as claimed in claim 1, wherein the first and second fixing members have a plurality of positioning portions respectively arranged in a mirror image, and each two adjacent positioning portions of the first fixing member and each two adjacent positioning portions arranged in a mirror image on the second fixing member define the limiting regions on the outer ring surface.

3. The motor as claimed in claim 1, wherein the inner diameter of the passage of the body is larger than the diameter of the rotation shaft in a direction perpendicular to the long axis of the rotation shaft.

4. The motor as claimed in claim 1, wherein the first fixing member and the second fixing member have a through hole respectively, and the first fixing member and the second fixing member are closely fitted to the rotation shaft through the through holes.

5. The motor as claimed in claim 1, wherein a first distance is provided between the first end surface and the second end surface in a direction parallel to the long axis of the rotating shaft, and a second distance is provided between the side surface of the first fixing member and the side surface of the second fixing member, and the first distance and the second distance are equal.

6. The motor as claimed in claim 1, wherein the width of the annular hollow part is equal to a distance between the side surface of the first fixing member and the side surface of the second fixing member in a direction parallel to the long axis of the rotation shaft.

7. The motor as claimed in claim 1, wherein the side surface of at least one of the first fixing member and the second fixing member has a first engaging structure, and the end surface of the body has a second engaging structure corresponding to the first engaging structure.

8. The motor as claimed in claim 1, wherein at least one of the first fixing member and the second fixing member is locked to the end surface of the body by a locking member.

9. The motor as claimed in claim 2, wherein the first and second fixing members further comprise two connecting portions, each connecting portion is correspondingly connected to the periphery of the first and second fixing members, and the positioning portions are connected to the connecting portions, wherein the first fixing member, the second fixing member, the connecting portions and the positioning portions are integrally formed as a single member.

10. The motor as claimed in claim 9, wherein each of the positioning portions of the first and second fixing members covers a portion of the surface of the magnetic member away from the body.

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