TW201907643A - Inner rotor motor rotor - Google Patents

Abstract

A rotor of an inner-rotor motor is used to relieve the loosening between a rotating shaft and a permanent magnet of the conventional motor. The rotor of the inner-rotor motor includes a rotating shaft having at least one first positioning portion, a permanent magnet mounted on the rotating shaft, and a connecting member having a hole through which the rotating shaft is fitted. A first end of the permanent magnet has at least one first engaging portion coupled with the at least one first positioning portion. A second end of the permanent magnet has a second engaging portion. The connecting member has a third engaging portion coupled with the second engaging portion of the permanent magnet.

Description

   Rotor of inner rotor motor   

The invention relates to a rotor, particularly a rotor of an inner rotor motor, in which a rotating shaft is combined with a permanent magnet.

The conventional motor rotor structure has a rotating shaft and a permanent magnet. The permanent magnet is in the shape of a cylinder, and a shaft hole is penetrated in the center. The permanent magnet can be sleeved on the rotating shaft to make the permanent magnet and the rotating shaft. Combine and rotate in sync.

Wherein, the coupling mode between the rotating shaft and the permanent magnet is coated with an adhesive between the rotating shaft and the shaft hole of the permanent magnet, so that the permanent magnet can be fixed and rotated synchronously with the rotating shaft. . However, the adhesive itself has a certain life span, and the rotor structure is exposed to high temperature and high-speed rotation for a long time, so the adhesive is easily deteriorated and aging and loses the adhesive effect.

In view of this, the conventional motor rotor does still need to be improved.

In order to solve the above problems, the present invention provides a rotor of an inner rotor motor, which is a rotor of an inner rotor motor with better combined stability.

The following directional or similar terms of the present invention, such as "front", "rear", "upper (top)", "lower (bottom)", "inside", "outside", "side", etc., are mainly related to With reference to the directions of the accompanying drawings, each directivity or its approximate terms are only used to assist in explaining and understanding the embodiments of the present invention, and are not intended to limit the present invention.

The rotor of the inner rotor motor of the present invention includes: a rotating shaft having at least a first positioning portion; and a permanent magnet provided on the rotating shaft. A first end of the permanent magnet has at least a first coupling portion and the at least one A first positioning portion is combined, a second end of the permanent magnet has a second coupling portion; and a group of connecting members are sleeved on the rotating shaft through a through hole, and the group of connecting members has a third coupling portion and the The second coupling part of the permanent magnet is combined.

According to this, the rotor of the inner rotor motor of the present invention uses at least a first joint portion of the permanent magnet and at least a first positioning portion of the rotating shaft, and the second joint portion of the permanent magnet is connected to the group. The third joint of the pieces is combined to enable the permanent magnet to be tightly combined with the rotating shaft, whereby the rotating shaft, the permanent magnet, and the assembly piece have better joint stability with each other, which can effectively prevent the The axial displacement or shedding of the permanent magnet with respect to the rotation axis can also prevent the radial movement of the permanent magnet with respect to the rotation axis and looseness in the circumferential direction.

Wherein, the permanent magnet has a through hole, and the permanent magnet is arranged on the rotating shaft through the through hole. In this way, the permanent magnet and the rotating shaft system have a relatively strong coupling effect.

The outer diameter of the assembly is smaller than or equal to the outer diameter of the permanent magnet. In this way, it has the effect of avoiding the at least one set of contacts from contacting the stator during rotation, and having a minimum air gap between the permanent magnet and the stator.

The at least one first positioning portion is a protruding block, and the at least one first coupling portion is a groove. In this way, it has the effects of preventing the permanent magnet from moving in the radial direction with respect to the rotation axis and loosening in the circumferential direction.

Wherein, a portion where the rotating shaft is combined with the permanent magnet has a cross section in a radial direction, and the cross section is a circular shape. In this way, the system has a coupling effect that is easy to assemble.

The second joint portion and the third joint portion have a tapered surface with a slope. In this way, it has the effects of preventing the permanent magnet from moving in the radial direction with respect to the rotation axis and loosening in the circumferential direction.

The inclination of the second joint portion and the third joint portion are complementary. This has the effect of avoiding radial movement of the permanent magnet with respect to the rotation axis and loosening in the circumferential direction.

The permanent magnet is composed of a plurality of unit bodies. Thus, the permanent magnet system has an effect of being easily magnetized.

The plurality of unit systems form the same structure. In this way, the permanent magnet system has the effects of being easily magnetized and being easily manufactured.

Wherein, the permanent magnet is composed of two unit bodies, and the two unit bodies are respectively formed into semicircular shapes. In this way, the permanent magnet system has the effects of being easily magnetized and being easily manufactured.

Wherein, the second joint portion of the second end of the permanent magnet has at least one first engaging portion, and the third joint portion of the assembly has at least one second engaging portion, and the at least one first engaging portion It can be engaged with the at least one second engaging portion. In this way, it has the effects of preventing the permanent magnet from moving in the radial direction with respect to the rotation axis and loosening in the circumferential direction.

Wherein, the at least one first engaging portion is formed into a V-shaped groove, and the at least one second engaging portion is formed into an inverted V-shaped protrusion. It has the effects of avoiding the radial movement of the permanent magnet with respect to the rotation axis and the looseness in the circumferential direction.

Wherein, a portion where the rotating shaft is combined with the permanent magnet has a cross section in a radial direction, and the cross section is a non-circular shape. In this way, it has the effect of preventing the permanent magnet from loosening in the circumferential direction with respect to the rotation axis.

The radial cross section is a polygon. In this way, it has the effect of preventing the permanent magnet from loosening in the circumferential direction with respect to the rotation axis.

Wherein, the polygonal included angle between the rotating shaft and the permanent magnet joint portion adjacent to the assembly is a chamfer. In this way, the system has the effect that it can be easily combined with the assembly.

Wherein, the second joint portion of the permanent magnet has a diameter reduction to form a shoulder portion, and the third joint portion of the set member forms a cap shape, so that the third joint portion of the set member can be combined in Forming the second joint portion of the shoulder portion. In this way, it has the effects of preventing the permanent magnet from moving in the radial direction with respect to the rotation axis and loosening in the circumferential direction.

Wherein, the rotation shaft further has a blocking portion, and the blocking portion is connected to the at least one first positioning portion. In this way, it has the effect of avoiding the axial movement of the permanent magnet with respect to the rotating shaft.

Wherein, the rotating shaft further has a perforation and a plug pin which penetrate the rotating shaft radially, and the plug pin extends through the perforation to form the at least one first positioning portion. In this way, it has the effect of being easy to manufacture.

Wherein, the bolt and the perforation are combined by welding or tight fitting. In this way, the permanent magnet and the group of connecting members have a relatively firm effect.

The latch is a cylindrical shape or a conical shape. In this way, it has the effect of being easily combined with the perforation.

Wherein, the at least one first positioning portion of the latch is tilted and inclined toward the direction of the permanent magnet. In this way, it has the effect of being easily combined with at least one first joint portion of the permanent magnet.

Wherein, it further includes a fixing member, and the rotating shaft further has a second positioning portion, and the fixing member is coupled to the second positioning portion. In this way, it has the effect of preventing the permanent magnet from being loosened from the at least one set of connectors.

Wherein, it further comprises a gasket, which is sleeved on the rotating shaft and located between the assembly and the fixing member. In this way, it has the effect of increasing the urgency between the fixing member and the at least one set of connecting members.

1‧‧‧rotation shaft

11‧‧‧The first positioning department

12‧‧‧Second Positioning Department

13‧‧‧stop

14‧‧‧ perforation

15‧‧‧ Bolt

2‧‧‧ permanent magnet

2a‧‧‧Unit

2b‧‧‧Unit

21‧‧‧through hole

22‧‧‧ the first joint

23‧‧‧ the second joint

2a1‧‧‧First end

2a2‧‧‧ second end

2b1‧‧‧ the first end

2b2‧‧‧ second end

2c1‧‧‧First end

2c2‧‧‧ second end

23a‧‧‧Shoulder

24‧‧‧ the first engagement section

3‧‧‧Assembly

31‧‧‧through hole

32‧‧‧ the third joint

33‧‧‧Second engagement section

4‧‧‧Fixed parts

5‧‧‧ Gasket

D ₁ ‧‧‧ Outer diameter of permanent magnet

D ₂ ‧‧‧ Outer diameter of assembly

Figure 1: An exploded perspective view of a first embodiment of the present invention.

FIG. 2 is a combined sectional view of the first embodiment of the present invention.

Fig. 3: An exploded perspective view of a second embodiment of the present invention.

FIG. 4 is a combined sectional view of a second embodiment of the present invention.

Fig. 5 is an exploded perspective view of a third embodiment of the present invention.

Fig. 6 is a combined sectional view of a third embodiment of the present invention.

Figure 7: An exploded perspective view of a fourth embodiment of the present invention.

Figure 8: An exploded perspective view of a fifth embodiment of the present invention.

In order to make the above and other objects, features, and advantages of the present invention more comprehensible, the following describes the preferred embodiments of the present invention and the accompanying drawings in detail, as follows: Please refer to FIG. A first embodiment of a rotor of an inner rotor motor according to the present invention, the rotor of the inner rotor motor includes a rotating shaft 1, a permanent magnet 2 and a set of connecting pieces 3, and the permanent magnet 2 is provided on an outer peripheral surface of the rotating shaft 1. The connecting member 3 is sleeved on the rotating shaft 1 and is coupled to one end of the permanent magnet 2.

Referring to FIGS. 1 and 2, the rotation shaft 1 has at least a first positioning portion 11 and a second positioning portion 12. The at least one first positioning portion 11 is formed on an outer peripheral surface of the rotation shaft 1, and the rotation shaft 1 The portion combined with the permanent magnet 2 has a cross section in the radial direction, and the cross section is preferably a circular shape. The at least one first positioning portion 11 may have a design protruding from the outer peripheral surface of the rotating shaft 1. In the embodiment, the at least one first positioning portion 11 is a protruding block; the second positioning portion 12 is spaced apart from the at least one first positioning portion 11 by a distance.

Please refer to FIGS. 1 and 2. The permanent magnet 2 is sleeved on the rotating shaft 1 through a through hole 21. The first end 2 c 1 of the permanent magnet 2 has at least one first joint 22. The first joint 22 It can be combined with the at least one first positioning portion 11. In this embodiment, the first coupling portion 22 forms a plurality of grooves corresponding to the at least one first positioning portion 11, so that the first coupling portion 22 It may be combined with at least one first positioning portion 11 forming a protrusion. The second end 2c2 of the permanent magnet 2 has a second joint portion 23, and the second joint portion 23 preferably forms a tapered surface. For example, the tapered surface may be an inclined surface or an inverted arc surface.

Please refer to FIG. 1 and FIG. 2, the assembly member 3 has a through hole 31, so that the assembly member 3 can be sleeved on the rotating shaft 1 through the through hole 31, and the assembly member 3 has a third combination. Part 32, the third joint part 32 may be combined with the second joint part 23 of the permanent magnet 2, the third joint part 32 preferably forms a tapered surface, and the third joint part 32 and the second joint The tapered surface of the portion 23 preferably has complementary slopes. In this way, the assembly piece 3 and the permanent magnet 2 can be combined, which will have a better combination effect. In particular, because the permanent magnet 2 has an air gap with a stator (not shown), the outer diameter D ₂ of the assembly 3 is preferably less than or equal to the outer diameter of the permanent magnet 2 D ₁ , when the third coupling portion 32 and the second coupling portion 23 are combined, the stator 3 can be avoided from contacting the stator when the assembly 3 rotates, and the permanent magnet 2 and the stator can be minimized. Air gap.

Please refer to FIGS. 1 and 2. The rotor of the inner rotor motor may further include a fixing member 4, which is set on the rotating shaft 1 and used to fix the permanent magnet 2 and the assembly member 3. The fixing The member 4 is combined with the second positioning portion 12 of the rotation shaft 1, and the combination is preferably a screwing method, so that the permanent magnet 2 and the assembly member 3 can be fixed to the rotation shaft 1. In addition, in order to prevent the group of connecting members 3 from loosening, a spacer 5 may be further included between the group of connecting members 3 and the fixing member 4. The spacer 5 is sleeved on the rotating shaft 1 and is located in the group. Between the connecting member 3 and the fixing member 4, in this way, the gasket 5 can prevent the fixing member 4 from loosening due to rotation. Among them, the gasket 5 is preferably elastic, such as: a spring washer, thereby Increase the urgency between the fixing member 4 and the set of connecting members 3.

Please refer to FIGS. 1 and 2. According to the foregoing structure, when the permanent magnet 2 is sleeved on the rotating shaft 1 by the through hole 21, the first end 2 c 1 of the permanent magnet 2 is formed by the at least one first joint portion 22. The second end 2c2 of the permanent magnet 2 is combined with the at least one first positioning portion 11 by the second coupling portion 23 and the third coupling portion 32 of the assembly 3, and The fixing member 4 is coupled to the second positioning portion 12 of the rotating shaft 1, so that the permanent magnet 2 can be tightly coupled to the rotating shaft 1, whereby the rotating shaft 1, the permanent magnet 2, and the assembly 3 are connected to each other. That is, it has better combination stability, which can effectively prevent the permanent magnet 2 from being displaced or detached from the rotating shaft 1 in the axial direction, and can also prevent the permanent magnet 2 from moving radially to the rotating shaft 1 and loosening in the circumferential direction. .

Please refer to FIGS. 3 and 4, which are the second embodiment of the rotor of the inner rotor motor of the present invention. In this embodiment, the rotating shaft 1 further has a stopper 13 connected to the at least one stopper 13. A first positioning portion 11, the permanent magnet 2 is composed of a plurality of unit bodies. In this embodiment, the plurality of unit systems are two unit bodies 2a, 2b, and the two unit bodies 2a, 2b are preferably formed the same. Structure, the two unit bodies 2a, 2b are each formed into a semi-circular shape. In this way, the two unit bodies 2a, 2b can be combined into the permanent magnet 2 and have a through hole 21, at least one first joint portion 22, and二 联 部 23。 Two joints 23. The through hole 21 may be provided on the rotating shaft 1; each of the first joint portions 22 of the first ends 2a1, 2b1 of the two unit bodies 2a, 2b may be combined with the at least one first positioning portion 11, each The second joint portion 23 can be combined with the third joint portion 32 of the assembly 3, and each of the second joint portion 23 and the third joint portion 32 preferably forms the same tapered surface. Each of the second joint portions 23 of the second ends 2a2, 2b2 of the two unit bodies 2a, 2b has a first engaging portion 24, and the assembly 3 further has a second engaging portion 33, Each of the first engaging portions 24 and the second engaging portions 33 can be engaged with each other. For example, each of the first engaging portions 24 is formed into a V-shaped groove, and the cross-section of the second engaging portion 33 is formed into an inverted V-shaped protrusion, so that the first engaging portion 24 and the second The engaging portions 33 can be engaged with each other.

Please refer to FIGS. 3 and 4. According to the foregoing structure, the two unit bodies 2 a and 2 b are combined with each other and the through hole 21 is provided on the rotating shaft 1. Compared with the first embodiment, the permanent magnet of this embodiment The first ends 2a1, 2b1 of 2 can abut against the stop portion 13, and the latching area between the permanent magnet 2 and the group of connecting members 3 can be relatively increased to provide the rotating shaft 1. The permanent magnet 2 and the connecting member 3 have a better combination effect, and can effectively prevent the permanent magnet 2 from being displaced or detached from the rotating shaft 1 in the axial direction, and can also avoid the radial of the permanent magnet 2 relative to the rotating shaft 1 Move and loosen in the circumferential direction.

Please refer to FIGS. 5 and 6, which are the third embodiment of the present invention. This third embodiment is substantially the same as the first embodiment described above. The main difference is that the rotation shaft 1 also has a stopper 13. The stop portion 13 is connected to the at least one first positioning portion 11. In addition, a cross-section in a radial direction of a portion where the rotating shaft 1 and the permanent magnet 2 are combined is non-circular in the third embodiment, and the permanent magnet 2 The radial cross section of the through hole 21 and the through hole 31 of the assembly 3 are formed in the same and combined shape, and the cross section may be a polygon such as a square, a hexagon, etc. The rotating shaft 1 in this embodiment The four square surfaces have four peripheral surfaces, the at least one first positioning portion 11 is respectively located on the four peripheral surfaces of the rotating shaft 1, and the through holes 21 of the permanent magnet 2 are also square to fit the rotating shaft 1, The at least one first joining portion 22 of the permanent magnet 2 is combined with the at least one first positioning portion 11, and the second joining portion 23 of the permanent magnet 2 is a third joining portion that can be connected to the group of connecting members 3. 32 is combined, in this embodiment, the second joint portion 23 has a diameter reduction to form a shoulder portion 23a, The third joint 32 of the assembly 3 is formed in a cap shape, so that the third joint 32 of the assembly 3 can be combined with the second joint 23 forming the shoulder 23a, so that the assembly The third joint portion 32 of 3 is combined with the second joint portion 23 of the permanent magnet 2. Wherein, the polygonal angle between the joint of the rotating shaft 1 and the permanent magnet 2 adjacent to the connecting member 3 is preferably a chamfer.

Please refer to FIGS. 5 and 6. According to the foregoing structure, when the through hole 21 of the permanent magnet 2 is sleeved on the rotating shaft 1, compared with the first embodiment, the first end of the permanent magnet 2 in this embodiment 2c1 can abut against the stopper 13 and the polygonal design of the rotating shaft 1 and the through hole 21 can increase the area of engagement with each other to provide the rotating shaft 1, the permanent magnet 2 and the group. A better combination effect between the connecting pieces 3, and can effectively prevent the permanent magnet 2 from being axially displaced or detached from the rotating shaft 1, and also prevent the permanent magnet 2 from moving radially with respect to the rotating shaft 1 and along Loose in the circumferential direction.

Please refer to FIG. 7, which is a fourth embodiment of the present invention. This fourth embodiment is substantially the same as the first embodiment described above. The main difference is that the rotating shaft 1 further has a perforation penetrating radially through the rotating shaft 1. 14. Use a pin 15 to extend through the perforation 14. Both ends of the pin 15 protrude from the outer peripheral surface of the rotating shaft 1 to form the at least one first positioning portion 11 so that the at least one first of the permanent magnet 2 The coupling portion 22 is combined with the at least one first positioning portion 11, wherein the plug pin 15 may be a cylindrical shape or a conical shape, and cooperate with the shape of the perforation 14 to extend through the perforation 14 and be combined with each other. The two are preferably fixed by welding or tight fitting. In addition, the second joint portion 23 of the permanent magnet 2 further has a plurality of first engaging portions 24, and the assembly member 3 further has a plurality of second Each of the first engaging portions 24 and the second engaging portion 33 can be engaged with each other. For example, each of the first engaging portions 24 forms a V-shaped groove, and the second engaging portions 33 form an inverted V-shaped protrusion, so that the first engaging portion 24 and the second engaging portion are formed. 33 can be combined with each other.

Please refer to FIG. 7. According to the foregoing structure, when the through hole 21 of the permanent magnet 2 is sleeved on the rotating shaft 1, compared with the first embodiment, this embodiment uses a pin 15 to extend to the rotation. The perforation 14 of the shaft 1, two ends of the latch 15 protrude from the outer peripheral surface of the rotating shaft 1 to form the at least one first positioning portion 11, so that the at least one first joint portion 22 of the permanent magnet 2 and the at least one A first positioning portion 11 is combined, in addition to providing different coupling methods, and the latching area between the permanent magnet 2 and the group of connecting members 3 can be relatively increased, which can effectively prevent the permanent magnet 2 from rotating relative to the The shaft 1 is axially displaced or detached, and the permanent magnet 2 is prevented from moving radially with respect to the rotating shaft 1 and loosening in the circumferential direction.

Please refer to FIG. 8, which is a fifth embodiment of the present invention. This fifth embodiment is substantially the same as the fourth embodiment described above. The main difference is that when the pin 15 extends through the perforation 14 of the rotating shaft 1, the The at least one first positioning portion 11 of the latch 15 is tilted upward, and the at least one first coupling portion 22 of the permanent magnet 2 forms a groove, so that the at least one first coupling portion 22 and the at least one first positioning portion 11 combined. Wherein, the at least one first positioning portion 11 of the latch 15 is tilted toward the direction of the permanent magnet 2 and is inclined, and the at least one first coupling portion 22 of the permanent magnet 2 is formed to cooperate with the at least one first A groove in the shape of the positioning portion 11.

Referring to FIG. 8, according to the foregoing structure, when the through hole 21 of the permanent magnet 2 is sleeved on the rotating shaft 1, compared with the fourth embodiment, the pin 15 of this embodiment extends through the rotating shaft 1. When the perforation 14 of 1 is formed, the at least one first positioning portion 11 of the latch 15 is upwardly lifted, and the at least one first coupling portion 22 of the permanent magnet 2 forms a groove, so that the at least one first coupling portion 22 and The at least one first positioning portion 11 is combined, in addition to providing different coupling modes, and the latching area between the permanent magnet 2 and the group of connecting members 3 can be relatively increased, which can effectively prevent the permanent magnet 2 from facing each other. Displace or fall off in the axial direction of the rotating shaft 1 and avoid radial movement of the permanent magnet 2 relative to the rotating shaft 1 and loosening in the circumferential direction.

In summary, the rotor of the inner rotor motor of the present invention uses at least a first coupling portion of the permanent magnet and at least a first positioning portion of the rotating shaft, and the second coupling portion of the permanent magnet and the The third coupling part of the assembly is combined, and the fixing part is coupled to the second positioning part of the rotating shaft, so that the permanent magnet can be tightly combined with the rotating shaft, whereby the rotating shaft and the permanent magnet are combined. And the assembly members have better combination stability between each other, which can effectively prevent the permanent magnet from being displaced or detached relative to the rotation axis, and can also prevent the permanent magnet from moving radially with respect to the rotation axis, and along the circumference. The direction is loose.

Although the present invention has been disclosed using the above-mentioned preferred embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make various changes and modifications to the above embodiments without departing from the spirit and scope of the present invention. The technical scope protected by the invention, so the scope of protection of the present invention shall be determined by the scope of the appended patent application.

Claims (23)

    A rotor of an inner rotor motor includes: a rotating shaft having at least a first positioning portion; and a permanent magnet provided on the rotating shaft. A first end of the permanent magnet has at least a first coupling portion and the at least one first A positioning portion is combined, the second end of the permanent magnet has a second coupling portion; and a group of connecting pieces is sleeved on the rotating shaft through a through hole, and the group connecting piece has a third coupling portion and the permanent magnet The second joint is combined.         According to the rotor of the inner rotor motor according to item 1 of the scope of the patent application, wherein the permanent magnet has a through hole, the permanent magnet is provided on the rotating shaft through the through hole.         According to the rotor of the inner rotor motor described in item 1 of the patent application scope, wherein the outer diameter of the assembly is smaller than or equal to the outer diameter of the permanent magnet.         According to the rotor of the inner rotor motor described in item 1 of the patent application scope, wherein the at least one first positioning portion is a protruding block, and the at least one first coupling portion is a groove.         According to the rotor of the inner rotor motor according to item 1 of the scope of the patent application, a portion where the rotating shaft is combined with the permanent magnet has a cross section in a radial direction, and the cross section is a circular shape.         The rotor of the inner rotor motor according to item 1 of the scope of patent application, wherein the second joint portion and the third joint portion have a tapered tapered surface.         According to the rotor of the inner rotor motor according to item 6 of the patent application scope, the inclination of the second joint portion and the third joint portion are complementary.         The rotor of the inner rotor motor according to item 1 of the patent application scope, wherein the permanent magnet is composed of a plurality of unit bodies.         The rotor of the inner rotor motor according to item 8 of the scope of patent application, wherein the plurality of unit systems form the same structure.         According to the rotor of the inner rotor motor according to item 8 of the scope of the patent application, the permanent magnet is composed of two unit bodies, each of which is formed into a semi-circular shape.         The rotor of the inner rotor motor according to item 1 of the scope of the patent application, wherein the second joint portion of the second end of the permanent magnet has at least a first engaging portion, and the third joint portion of the assembly has At least one second engaging portion, the at least one first engaging portion and the at least one second engaging portion may be engaged with each other.         The rotor of the inner rotor motor according to item 11 of the scope of patent application, wherein the at least one first engaging portion is formed into a V-shaped groove, and the at least one second engaging portion is formed into an inverted V-shaped protrusion. Out.         The rotor of the inner rotor motor according to item 1 of the scope of the patent application, wherein a portion where the rotating shaft is combined with the permanent magnet has a cross section in a radial direction, and the cross section is a non-circular shape.         The rotor of the inner rotor motor according to item 13 of the patent application scope, wherein the radial cross section is polygonal.         According to the rotor of the inner rotor motor according to item 14 of the scope of the patent application, wherein the polygonal angle between the rotating shaft and the permanent magnet joint portion adjacent to the assembly is a chamfer.         The rotor of the inner rotor motor according to item 1 of the scope of the patent application, wherein the second joint of the permanent magnet has a diameter reduction to form a shoulder, and the third joint of the assembly forms a cap. The shape of the cover enables the third joint portion of the assembly member to be joined to the second joint portion forming the shoulder portion.         According to the rotor of the inner rotor motor according to item 1 of the scope of the patent application, wherein the rotating shaft further has a stopper portion, the stopper portion is connected to the at least one first positioning portion.         According to the rotor of the inner rotor motor according to item 1 of the scope of the patent application, wherein the rotating shaft further has a perforation and a pin that penetrates the rotating shaft radially, the pin extends through the perforation to form the at least one first positioning. unit.         The rotor of the inner rotor motor according to item 18 of the scope of the patent application, wherein the bolt and the perforation are combined by welding or a tight fit.         According to the rotor of the inner rotor motor according to item 18 of the scope of the patent application, wherein the latch is a cylindrical shape or a conical shape.         According to the rotor of the inner rotor motor according to item 18 of the scope of patent application, wherein the at least one first positioning portion of the latch is tilted toward the direction of the permanent magnet and is inclined.         The rotor of the inner rotor motor according to any one of claims 1 to 21, further comprising a fixing member, and the rotating shaft further has a second positioning portion, and the fixing member is coupled to the second positioning portion. .         The rotor of the inner rotor motor according to item 22 of the scope of the patent application, further includes a gasket, which is sleeved on the rotating shaft and located between the assembly and the fixing member.