JP2002233088A - Permanent magnet rotator of rotating electric appliance and filling method of its adhesive - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the permanent magnet rotator of a rotating electric appliance capable of facilitating the application working of an adhesive and contriving the improvement of productivity. SOLUTION: The permanent magnet rotator of the rotating electric appliance arranged in the inside of a stator performing a winding and fitting a cylindrical permanent magnet and fixed by adhesion at a position opposite to the magnetic pole tees of the stator of the outer peripheral face of a rotary shaft is provided with a large diameter part 5 and a small diameter part 6 formed by providing a level difference on a part fitting the permanent magnet 3 of the rotary shaft 4, a cylindrical member 7 fitted to the small diameter part 6 and arranging the end face 7a through the end face 5a of the large diameter part 5 and a prescribed interval 8, and the adhesive 9 filled between each outer peripheral face of the large diameter part 5 and the cylindrical member 7 and the inner peripheral face of the permanent magnet 3 from a prescribed interval 8 formed between the end faces 5a, 7a of the large diameter part 5 and the cylindrical member 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a permanent magnet rotor for a rotating electric machine having a cylindrical permanent magnet adhered to the outer periphery of a rotating shaft and a method for filling the permanent magnet with the adhesive. It is related to facilitation of work.

[0002]

2. Description of the Related Art A conventional permanent magnet rotor of a rotary electric machine generally comprises a cylindrical permanent magnet arranged at a position on the outer peripheral surface of a rotating shaft facing a magnetic pole taste of a stator. The shaft and the permanent magnet are fixed by an adhesive.

[0003]

The permanent magnet rotor of the conventional rotating electric machine is constructed as described above, and the rotation shaft and the permanent magnet are fixed by bonding, so that the gap between the rotation shaft and the permanent magnet is set. The adhesive protrudes from the end to the axial direction, and if the protruded adhesive is left as it is, it will scatter during rotation and must be scraped off using a blade.
However, since the scraped-off adhesive causes scratches and projections, there is a problem that stress is concentrated during operation and fatigue strength is reduced.

For this reason, although not shown, for example,
As disclosed in JP-A-1400078, the concentration of stress is suppressed by forming a protruding adhesive so that both end faces are rounded using a special adhesive forming jig, thereby suppressing the concentration of stress and reducing the fatigue strength. Since extra work is required due to the need for work such as improvement, the use of high-viscosity adhesive makes it difficult for the adhesive to spread over the entire gap between the rotating shaft and the permanent magnet. For this reason, for example, a work step of applying an adhesive with a brush or the like is required, so that there is a problem that the work of bonding is troublesome and productivity is reduced.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has made it easier to apply an adhesive.
It is an object of the present invention to provide a permanent magnet rotor of a rotating electrical machine and a method of filling the adhesive with the adhesive, which can improve productivity.

[0006]

According to a first aspect of the present invention, there is provided a permanent magnet rotor for a rotating electric machine, which is disposed inside a stator on which a winding is provided, and a magnetic pole of the stator on an outer peripheral surface of a rotating shaft. In a permanent magnet rotor of a rotating electric machine, in which a cylindrical permanent magnet is fitted and fixed by bonding at a position facing the taste, a large step formed at a portion where the permanent magnet of the rotating shaft is fitted is provided. The cylindrical portion is inserted between the large-diameter portion and the small-diameter portion, the cylindrical member which is fitted into the small-diameter portion, and whose end surface is disposed with a predetermined gap from the large-diameter portion end surface, and formed between the large-diameter portion and the cylindrical member. An adhesive is filled from a predetermined gap between each outer peripheral surface of the large diameter portion and the cylindrical member and the inner peripheral surface of the permanent magnet.

According to a second aspect of the present invention, there is provided a permanent magnet rotor for a rotary electric machine according to the first aspect, wherein each of the large-diameter portion and the outer end of the cylindrical member extends in the radial direction and the tip is a permanent magnet. Are formed with flanges to be in contact with the respective end faces.

A permanent magnet rotor for a rotating electric machine according to a third aspect of the present invention is disposed inside a stator on which a winding is applied, and faces a magnetic pole taste of the stator on an outer peripheral surface of a rotating shaft. In a permanent magnet rotor of a rotating electrical machine in which a cylindrical permanent magnet is fitted and fixed by bonding at a position, a cylindrical cavity formed between the rotating shaft and the permanent magnet, and one end of the cavity in the axial direction And a first cylindrical member which is fitted to the rotating shaft and whose outer periphery is loosely fitted to the permanent magnet, and which is fitted to the rotating shaft from the other axial end of the cavity and whose outer periphery is loosely fitted to the permanent magnet. A second cylindrical member whose end surface is disposed with a predetermined gap from the end surface of the first cylindrical member, and a predetermined gap formed between the respective end surfaces of both cylindrical members. Bonding between each outer peripheral surface of the shaped member and the inner peripheral surface of the permanent magnet It is those with a door.

According to a fourth aspect of the present invention, there is provided a permanent magnet rotor for a rotating electric machine according to the third aspect, wherein the first and second permanent magnet rotors are provided.
Each of the outer ends of the cylindrical member has a flange formed so as to extend in the radial direction and to have a front end in contact with each end face of the permanent magnet.

According to a fifth aspect of the present invention, there is provided a permanent magnet rotor for a rotary electric machine according to the first or third aspect, wherein a predetermined gap is disposed so as to be inclined with respect to the axis.

According to a sixth aspect of the present invention, there is provided a permanent magnet rotor for a rotary electric machine according to the first or third aspect, wherein the total magnetic flux which can pass through a predetermined width of the gap when there is no gap. It is set so that a magnetic flux of 8% or more can pass.

According to a seventh aspect of the present invention, there is provided a permanent magnet rotor for a rotating electric machine according to the first or third aspect, wherein the predetermined gap is disposed substantially at the center of the permanent magnet in the axial direction.

According to a second aspect of the present invention, there is provided a permanent magnet rotor for a rotating electric machine according to the second or fourth aspect, wherein air is vented between both end faces of the permanent magnet and the respective flanges respectively contacting the both end faces. It is provided.

According to a ninth aspect of the present invention, in the method of filling an adhesive for a permanent magnet rotor of a rotating electric machine, the adhesive is applied to one end face forming a predetermined gap. And a step of moving the other end face to the one end face side to form a predetermined gap, thereby forcing an excess amount of the adhesive into the gap formed inside the permanent magnet to be spread. Things.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. Embodiment 1 FIG. FIG. 1 shows a configuration of a rotating electric machine to which a permanent magnet rotor according to Embodiment 1 of the present invention is applied,
2A is a front view, FIG. 2B is a side sectional view, FIG. 2 is a side sectional view showing a configuration of the permanent magnet rotor in FIG. 1, and FIG. 3 is a view showing a manufacturing process of the permanent magnet rotor in FIG. is there.

Referring to FIG. 1, reference numeral 1 denotes a stator having a plurality of magnetic pole teeth 1a on which windings 2 are provided; 3, a cylindrical permanent magnet disposed at a position facing each magnetic pole tooth 1a;
Is a rotary shaft fitted inside the permanent magnet 3, and a large diameter portion 5 and a small diameter portion 6 are formed by providing a step in a portion fitted with the permanent magnet 3. 7 is fitted to the small-diameter portion 6 of the rotating shaft 4, and its end surface 7 a is the end surface 5 a of the large-diameter portion 5 of the rotating shaft 4.
And a cylindrical member 9 arranged with a predetermined gap 8 therebetween. The outer peripheral surface of the large-diameter portion 5 and the cylindrical member 7 and the inner surface of the permanent magnet 3 are separated from the gap 8 formed between both end surfaces 5a and 7a. The adhesive is filled over the gap 10 formed between the peripheral surface and the permanent magnet rotor 11.

Next, a manufacturing process of the permanent magnet rotor 11 according to the first embodiment configured as described above will be described with reference to FIG. First, as shown in FIG. 3 (A), a permanent magnet 3, a rotating shaft 4, and a cylindrical member 7 which are processed in different processes are prepared. Next, as shown in FIG. 3B, the permanent magnet 3 is fitted to the large diameter portion 5 of the rotating shaft 4. Then, as shown in FIG. 3C, the adhesive 9 is applied to the end face 5a of the large diameter portion 5 of the rotating shaft 4 by a predetermined thickness. Next, FIG.
As shown in (D), a cylindrical member 7 is attached to the small diameter portion 6 of the rotating shaft 4.
And moved to the large diameter portion 5 side as shown by the arrow.

Then, as shown in FIG. 3 (E), it is brought close to a position where a predetermined gap 8 is formed between the end face 7a and the end face 5a of the large diameter portion 5. Then, a part of the adhesive 9 interposed between the both end faces 5a, 7a, that is, the surplus is pushed out by the pressing force due to the movement of the cylindrical member 7, and the outer peripheral surfaces of the large diameter portion 5 and the cylindrical member 7 , And into the gap 10 formed between the permanent magnet 3 and the inner peripheral surface. Therefore, if the thickness of the adhesive 9 applied to the end face 5a of the large diameter portion 5 is set so that the capacity of the adhesive 9 extruded from the predetermined gap 8 is equal to the volume 10 of the gap 10. The adhesive 9 can be spread all over the gap 10. Then, the adhesive 9 is cured to complete the entire process, and the permanent magnet rotor 11 is completed.

As described above, according to the first embodiment, the large-diameter portion 5 and the small-diameter portion 6 are formed by providing a step in the portion of the rotary shaft 4 where the permanent magnet 3 is fitted. End face 5a
After applying a predetermined thickness of adhesive 9 to the small-diameter portion 6, the cylindrical member 7 is fitted into the small-diameter portion 6, and a predetermined gap 8 is formed between the end surface 7a and the end surface 5a of the large-diameter portion 5. A gap formed between the outer peripheral surface of the large diameter portion 5 and the outer peripheral surface of the cylindrical member 7 and the inner peripheral surface of the permanent magnet 3 by extruding an excess amount of the adhesive 9 interposed between the both end surfaces 5a and 7a. Since the permanent magnet 3 and the rotary shaft 4 are bonded by pressure feeding into the inside 10, application work with a brush or the like is not required, so that the work of the bonding work can be omitted, the work can be simplified, and the productivity can be improved. be able to. Further, by controlling the thickness of the adhesive 9 applied to the end surface 5a of the large diameter portion 5, the adhesive 9 is applied to both ends of the permanent magnet 3.
It is also possible to prevent the protrusion.

Embodiment 2 FIG. 4 is a side sectional view showing a configuration of a permanent magnet rotor according to Embodiment 2 of the present invention. In the figure, the same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. Reference numeral 12 denotes a rotating shaft fitted inside the cylindrical permanent magnet 3, and a step is provided in a portion fitted with the permanent magnet 3 so that a large diameter portion 13 and a small diameter portion 14 are formed. Flanges 13a are formed at the outer end portions, each extending in the radial direction and having a leading end abutting on one end side end surface of the permanent magnet 3.

Reference numeral 15 denotes a small-diameter portion 14 of the rotary shaft 12 whose end face 15a is
3b is a cylindrical member disposed with a predetermined gap 16 therebetween. A flange portion 15b is formed at the outer end portion of the outer end portion and extends in the radial direction and has a front end abutting on the other end surface of the permanent magnet 3. . 17 is a gap 1 formed between both end faces 13b and 15a.
6 is an adhesive filled over a gap 18 formed between the outer peripheral surface of the large diameter portion 13 and the cylindrical member 15 and the inner peripheral surface of the permanent magnet 3. A permanent magnet rotor 19 is constituted by 18. Note that the manufacturing process of the permanent magnet rotor 19 is the same as that in the first embodiment, and a description thereof will be omitted.

As described above, according to the second embodiment, as in the first embodiment, the application operation using a brush or the like is not required, and the work of the bonding operation is simplified, and the productivity is improved. Of course, the large diameter portion 13 of the rotating shaft 12 and each outer end of the cylindrical member 15 are provided with a flange portion 13 which is in contact with each end surface of the permanent magnet 3.
Since a and 15b are respectively formed, it is possible to easily prevent the adhesive 17 from protruding from both ends of the gap 18. Further, the positioning of the permanent magnet 3 in the axial direction of the rotating shaft 12 is facilitated by the flange portions 13a and 15b.

Embodiment 3 FIG. FIG. 5 is a side sectional view showing a configuration of a permanent magnet rotor according to Embodiment 3 of the present invention, and FIG. 6 is a view showing a manufacturing process of the permanent magnet rotor in FIG. In the figure, the same components as those in the first and second embodiments are denoted by the same reference numerals, and description thereof is omitted.

Reference numeral 20 denotes a cylindrical cavity 2 inside the permanent magnet 3.
A first cylindrical member 23 is disposed on one end side of the cavity 21 in the axial direction of the cavity 21 and is fitted on the rotating shaft 20 and the outer periphery is loosely fitted on the permanent magnet 3. Is inserted into the rotating shaft 20 from the other axial end of the cavity 21 and the outer periphery is loosely fitted to the permanent magnet 3, and its end face 23 a is spaced from the end face 22 a of the first cylindrical member 22 through a predetermined gap 24. The second cylindrical member 25 to be disposed is formed from a predetermined gap 24 formed between the respective end surfaces 22a and 23a of the two cylindrical members 22 and 23 from the outer peripheral surfaces of the two cylindrical members 22 and 23 and the permanent magnet. An adhesive is filled over a gap 26 formed between the inner peripheral surfaces of the permanent magnets 3, and the permanent magnet rotor 27 is composed of the adhesives 3, 20 to 26.

Next, a manufacturing process of the permanent magnet rotor 27 according to the third embodiment configured as described above will be described with reference to FIG. First, as shown in FIG. 6A, a permanent magnet 3, a rotating shaft 20, a first cylindrical member 22, and a second cylindrical member 23, which are processed in different processes, are prepared. Next, as shown in FIG. 6B, the first cylindrical member 22 is fitted to one end of the rotating shaft 20 in the axial direction. Then, as shown in FIG. 6C, the permanent magnet 3 is loosely fitted to the outside of the first cylindrical member 22. At this time, the cylindrical cavity 21 is formed inside the permanent magnet 3, and the first cylindrical member 22 is disposed at one axial end of the cavity 21.

Next, as shown in FIG. 6D, an adhesive 25 is applied to the end surface 22a of the first cylindrical member 22 by a predetermined thickness. Next, as shown in FIG. 6 (E), the second cylindrical member 23 is fitted into the rotation shaft 20 from the other end in the axial direction of the cavity 21 and moved toward the first cylindrical member 22 as indicated by an arrow. Let it. At this time, the permanent magnet 3 is connected to the second cylindrical member 23.
Is loosely fitted to the outside. And FIG.
As shown in (F), the end surface 23a and the end surface 22a of the first cylindrical member 22 are brought closer to a position where a predetermined gap 24 is formed. Then, an excess of the adhesive 25 interposed between the both end faces 22a, 23a is pushed out by the pressing force due to the movement of the second cylindrical member 23, and is made permanent with the outer peripheral surfaces of the two cylindrical members 22, 23. It is pressure-fed into the gap 26 formed between the magnet 3 and the inner peripheral surface, and spreads over the entire area. Then, the adhesive 25 is cured to complete the entire process, and the permanent magnet rotor 27 is completed.

As described above, according to the third embodiment, the first hollow portion 21 is fitted to the rotating shaft 20 at one end side and the first
Is disposed on the end surface 22a of the adhesive member 2.
5 is applied by a predetermined thickness, the second cylindrical member 23 is fitted into the rotating shaft 20 from the other end side of the cavity 21, and between the end surface 23 a and the end surface 22 a of the first cylindrical member 22. ,
By forming the predetermined gap 24, both end faces 22a,
An excess amount of the adhesive 25 interposed between 23a is extruded and is pressure-fed into a gap 26 formed between the outer peripheral surface of each of the cylindrical members 22, 23 and the inner peripheral surface of the permanent magnet 3, Since the bonding between the permanent magnet 3 and the rotary shaft 20 is performed, the application work using a brush or the like is not required, and the work of the bonding operation can be omitted, the operation can be simplified, and the productivity can be improved.
Further, by controlling the applied thickness of the adhesive 25, it is possible to prevent the adhesive 25 from protruding to both end sides of the permanent magnet 3. Furthermore, by interposing the two cylindrical members 22 and 23 between the rotating shaft 20 and the permanent magnet 3,
Since the shape of the rotating shaft 20 is simplified, the processing is facilitated and the cost can be reduced.

Embodiment 4 FIG. 7 is a side sectional view showing a configuration of a permanent magnet rotor according to Embodiment 4 of the present invention. In the figure, the same parts as those in the third embodiment are denoted by the same reference numerals, and the description is omitted. 28 is a cavity 21
A first cylindrical member which is disposed at one end in the axial direction and which is fitted to the rotating shaft 20 and whose outer periphery is loosely fitted to the permanent magnet 3. 3 is formed with a flange portion 28a which is in contact with one end side end surface. Numeral 29 is fitted into the rotating shaft 20 from the other axial end of the cavity 21, and its outer periphery is loosely fitted to the permanent magnet 3, and its end face 29 a is spaced from the end face 28 b of the first cylindrical member 28 via a predetermined gap 30. A flange portion 29b is formed at the outer end portion of the second cylindrical member, which extends in the radial direction and has a distal end abutting on the other end surface of the permanent magnet 3. 31
Are formed from predetermined gaps 30 formed between the end surfaces 28b and 29a of the cylindrical members 28 and 29, respectively.
9 is an adhesive filled over a gap 32 formed between the outer peripheral surface of the permanent magnet 3 and the inner peripheral surface of the permanent magnet 3.
The permanent magnet rotor 33 is constituted by 0, 21, 28 and 32. Note that the manufacturing process of the permanent magnet rotor 33 is the same as that in the third embodiment, and the description is omitted.

As described above, according to the fourth embodiment, as in the third embodiment, the application operation using a brush or the like is not required, and the labor of the bonding operation is simplified, and the productivity is improved. Of course, you can
Flange portions 2 abutting on the respective outer end portions of the cylindrical member 28 and the second cylindrical member 29 of FIG.
Since each of 8a and 29b is formed, it is possible to easily prevent the adhesive 31 from protruding from both ends of the gap 32. Further, the positioning of the permanent magnet 3 in the axial direction of the rotating shaft 20 is facilitated by the flange portions 28a and 29b.

Embodiment 5 FIG. 8 is a side sectional view showing a configuration of a permanent magnet rotor according to Embodiment 5 of the present invention. In the figure, the same parts as those in the second embodiment are denoted by the same reference numerals, and the description is omitted. Reference numeral 34 denotes a rotary shaft fitted inside the permanent magnet 3, and a large-diameter portion 35 and a small-diameter portion 36 are formed by providing a step in a portion fitted with the permanent magnet 3. The end portion has a flange portion 35a extending in the radial direction and the tip end abutting on one end side end surface of the permanent magnet 3, and the inner end portion has an end surface 35b inclined with respect to the axis.

Reference numeral 37 denotes a small diameter portion 36 of the rotating shaft 34, and an end surface 37a inclined with respect to the axis, like the end portion 35b of the large diameter portion 35, has a predetermined gap with the end surface 35b of the large diameter portion 35. 38 is a cylindrical member arranged via 38, and 39 are both end faces 3
5b, 37a, the large-diameter portion 35
And an adhesive filled over a gap 40 formed between the outer peripheral surface of the cylindrical member 37 and the inner peripheral surface of the permanent magnet 3.
1. Note that the manufacturing process of the permanent magnet rotor 41 is the same as that in the first embodiment, and a description thereof will be omitted.

As described above, according to the fifth embodiment, similarly to the second embodiment, the application operation using a brush or the like is not required, and the labor of the bonding operation is simplified, and the productivity is improved. The large diameter portion 35 of the rotating shaft 34
Since the flange portions 35a and 37b that are in contact with the respective end surfaces of the permanent magnet 3 are formed at the respective outer end portions of the cylindrical member 37, the adhesive 39 easily protrudes from both ends of the gap 40. Of course, both ends 35b of the large-diameter portion 35 and the cylindrical member 37 can be prevented.
Since the predetermined gap 38 formed by 37a is arranged so as to be inclined with respect to the axis, the applied adhesive 39
Can be gathered at a certain position and can be uniformly pumped, so that better adhesion can be achieved.

Although the fifth embodiment has been described with respect to the case where the predetermined gap 38 is formed by inclining the predetermined gap in the configuration of the second embodiment with respect to the axis, the present invention is not limited to this. It is needless to say that the same effects as described above can be exerted even when the present invention is applied to the configuration of each of the other embodiments described above.

Embodiment 6 FIG. FIG. 9 is a side sectional view showing a configuration of a permanent magnet rotor according to Embodiment 6 of the present invention. In the figure, the same parts as those in the second embodiment are denoted by the same reference numerals, and the description is omitted. Reference numeral 42 denotes a rotating shaft fitted inside the cylindrical permanent magnet 3. A step is provided in a portion fitted with the permanent magnet 3 so that a large diameter portion 43 and a small diameter portion 44 are formed. A plurality of protrusions 4 extending in the radial direction and projecting at predetermined intervals in the circumferential direction are provided on the outer end.
Flanges 43b that are in contact with one end side end face of the permanent magnet 3 are formed via the respective 3a.

45 is fitted to the small-diameter portion 44 of the rotary shaft 42, and its end surface 45a is connected to the end surface 4 of the large-diameter portion 43 of the rotary shaft 42.
A permanent magnet through a plurality of protrusions 45b extending radially at the outer end and projecting at predetermined intervals in the circumferential direction at the outer end. A flange portion 45c that is in contact with the other end surface of the third member 3 is formed. 47 is a gap 4 formed between the outer peripheral surface of the large diameter portion 43 and the cylindrical member 45 and the inner peripheral surface of the permanent magnet 3 from a gap 46 formed between both end surfaces 43c and 45a.
The permanent magnet rotator 49 is composed of an adhesive filled over 8 and these 3, 42 to 48. Note that the manufacturing process of the permanent magnet rotor 49 is the same as that in the first embodiment, and a description thereof will be omitted.

As described above, according to the sixth embodiment, as in the second embodiment, the application operation using a brush or the like is not required, and the labor of the bonding operation is simplified, and the productivity is improved. The large diameter portion 43 of the rotating shaft 42
Also, flange portions 43b and 45b are formed at the outer end portions of the cylindrical member 45 at the end surfaces of the permanent magnet 3 via the projections 43a and 45c, respectively. Of course, it is possible to easily prevent the agent 47 from protruding.
Since the gap formed between b serves as an air vent,
The pressure feed of the adhesive 47 becomes smooth, and more favorable bonding becomes possible.

The sixth embodiment is different from the second embodiment in that each of the flanges of the second embodiment has a projection 43.
Although the case where a and 45c are formed has been described, the present invention is not limited to this case.
It is needless to say that the configuration for air release is not limited to the gap formed between the projections 43a and 45b. Further, in each of the above embodiments, the position where each predetermined gap is formed has not been described in detail. However, by disposing the permanent magnet at a substantially central portion in the axial direction, the adhesive is more uniformly pumped. It is possible to perform better adhesion.

Further, it is desirable that the predetermined gap in each of the above-described embodiments does not have magnetic characteristics. However, the width of the predetermined gap is set to 9% of the total magnetic flux that can be passed without the gap.
By setting the dimension to be equal to or smaller than the dimension that allows passage of a magnetic flux of 9.8% or more, it is possible to suppress the influence on the magnetic characteristics and maintain the performance of the permanent magnet rotor. The width of the predetermined gap is, for example, the outer diameter of the permanent magnet 3 is 30 to 40 m.
In the case of m, the value is almost the same as the dimension of the gap formed between the magnetic pole taste. Although not described in the above embodiments, it goes without saying that each cylindrical member is formed of a magnetic material.

[0039]

As described above, according to the first aspect of the present invention, the stator is disposed inside the stator on which the winding is provided, and is located on the outer peripheral surface of the rotating shaft at a position facing the magnetic pole teeth of the stator. In a permanent magnet rotor of a rotating electric machine in which a cylindrical permanent magnet is fitted and fixed by bonding, a large-diameter portion and a small-diameter portion are formed by providing a step in a portion where the permanent magnet of the rotating shaft is fitted. A cylindrical member which is fitted into the small diameter portion and whose end surface is disposed with a predetermined gap from the end surface of the large diameter portion, and a predetermined gap formed between each end surface of the large diameter portion and the cylindrical member. Since an adhesive filled between the outer peripheral surface of the diameter portion and the cylindrical member and the inner peripheral surface of the permanent magnet is provided, the operation of applying the adhesive is facilitated, and the productivity is improved. It is possible to provide a permanent magnet rotor of a rotating electric machine that can perform the following.

According to a second aspect of the present invention, in the first aspect, the large-diameter portion and each outer end of the cylindrical member are provided with:
The flanges extending in the radial direction are formed so that the tips are in contact with the respective end faces of the permanent magnet. This not only improves the productivity, but also easily prevents the adhesive from protruding from both ends of the permanent magnet. It is possible to provide a permanent magnet rotor of a rotating electric machine that can perform the following.

According to the third aspect of the present invention, the cylindrical permanent magnet is disposed inside the stator on which the winding is applied, and is located on the outer peripheral surface of the rotating shaft at a position facing the magnetic pole teeth of the stator. In a permanent magnet rotor of a rotating electric machine in which a magnet is fitted and fixed by bonding, a cylindrical cavity formed between a rotating shaft and a permanent magnet, and a cylindrical cavity disposed at one axial end of the cavity and fitted to the rotating shaft. First, the outer periphery is loosely fitted to the permanent magnet
And the outer periphery is loosely fitted to the permanent magnet, and the end surface thereof is disposed with a predetermined gap from the end surface of the first cylindrical member. The space between the outer peripheral surface of both cylindrical members and the inner peripheral surface of the permanent magnet is filled from a predetermined gap formed between the second cylindrical member and the end surfaces of both cylindrical members. With this configuration, it is possible to provide a permanent magnet rotor of a rotating electric machine that can facilitate the operation of applying the adhesive and improve productivity.

According to a fourth aspect of the present invention, in the third aspect, each of the outer ends of the first and second cylindrical members has a radially extending tip and an end face of each of the permanent magnets. Provided is a permanent magnet rotor of a rotating electric machine that has a flange to be abutted, thereby improving productivity and easily preventing adhesive from protruding from both ends of a permanent magnet. Can be.

According to a fifth aspect of the present invention, in accordance with the first or third aspect, the predetermined gap is arranged to be inclined with respect to the axis, so that the permanent magnet of the rotating electrical machine can be more excellently bonded. A rotor can be provided.

According to claim 6 of the present invention, in claim 1 or 3, a magnetic flux of 99.8% or more of the total magnetic flux that can pass through the predetermined gap width when there is no gap is passed. Since the setting is made possible, it is possible to provide a permanent magnet rotor of a rotating electrical machine that can maintain the performance while suppressing the influence on the magnetic characteristics.

According to a seventh aspect of the present invention, in the first or third aspect, the predetermined gap is disposed substantially at the center of the permanent magnet in the axial direction, so that the rotating electric machine can perform better bonding. Can be provided.

According to the eighth aspect of the present invention, the air vent is provided between both end faces of the permanent magnet and the respective flanges respectively contacting the both end faces in the second or fourth aspect, so that it is easier. It is possible to provide a permanent magnet rotor of a rotating electric machine that can be bonded.

According to a ninth aspect of the present invention, a step of applying an adhesive to one end surface forming a predetermined gap;
Forming a predetermined gap by moving the other end face to the one end face side, and thereby a step of forcibly feeding an excess amount of the adhesive to a gap formed inside the permanent magnet to spread the adhesive. A method of filling an adhesive for a permanent magnet rotor of a rotating electric machine according to claims 1 to 8 which can facilitate the application of an agent and improve productivity.

[Brief description of the drawings]

FIG. 1 shows a configuration of a rotary electric machine to which a permanent magnet rotor according to Embodiment 1 of the present invention is applied, wherein (A) is a front view and (B) is a side sectional view.

FIG. 2 is a side sectional view showing a configuration of a permanent magnet rotor in FIG.

FIG. 3 is a view showing a manufacturing process of the permanent magnet rotor in FIG. 2;

FIG. 4 is a side sectional view showing a configuration of a permanent magnet rotor according to Embodiment 2 of the present invention.

FIG. 5 is a side sectional view showing a configuration of a permanent magnet rotor according to Embodiment 3 of the present invention.

FIG. 6 is a view showing a manufacturing process of the permanent magnet rotor in FIG. 5;

FIG. 7 is a side sectional view showing a configuration of a permanent magnet rotor according to Embodiment 4 of the present invention.

FIG. 8 is a side sectional view showing a configuration of a permanent magnet rotor according to Embodiment 5 of the present invention.

FIG. 9 is a side sectional view showing a configuration of a permanent magnet rotor according to Embodiment 6 of the present invention.

[Explanation of symbols]

1 stator, 2 windings, 3 permanent magnets, 4, 12, 2
0, 34, 42 Rotation axis, 5, 13, 35, 43 Large diameter part, 6, 14, 36, 44 Small diameter part, 7, 15, 37,
45 cylindrical member, 8, 16, 24, 30, 38, 46
Gap, 9, 17, 25, 31, 39, 47 adhesive,
10, 18, 26, 32, 40, 48 gap, 11, 1
9, 27, 33, 41, 49 permanent magnet rotor, 21
Cavity, 22, 28 First cylindrical member, 23, 29 Second cylindrical member, 5a, 7a, 13b, 15a, 22
a, 23a, 28b, 29a, 35b, 37a, 43
c, 45a end faces, 13a, 15b, 28a, 29b,
35a, 37b, 43b, 45c Flange, 43
a, 45b Projection.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Kazuyuki Yamamoto, 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsui Electric Co., Ltd. (72) Yuji Nakahara 2-3-2, Marunouchi, Chiyoda-ku, Tokyo (72) Inventor Kazuo Matsunaga 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsui Electric Co., Ltd. (72) Koichiro Kamei 2-3-2 Marunouchi, Chiyoda-ku, Tokyo F term (reference) in Denki Co., Ltd. 5H002 AA07 AA08 AB01 AB08 AC04 AC06 5H622 CA01 CA05 CA10 PP03 PP19

Claims (9)

[Claims] 1. A cylindrical permanent magnet is fitted inside a stator on which a winding is applied and opposed to a magnetic pole taste of the stator on an outer peripheral surface of a rotating shaft, and is fixed by bonding. A large-diameter portion and a small-diameter portion formed by providing a step in a portion of the rotating shaft where the permanent magnet is fitted, and a large-diameter portion and a small-diameter portion that are fitted into the small-diameter portion and whose end faces are the large-diameter portions. The cylindrical member disposed with a predetermined gap from the end surface of the large diameter portion and the predetermined gap formed between the end surfaces of the large diameter portion and the cylindrical member. A permanent magnet rotor for a rotating electrical machine, comprising: an adhesive filled between each outer peripheral surface and an inner peripheral surface of the permanent magnet. 2. The large-diameter portion and the outer end of the cylindrical member are formed with a flange extending radially and having a leading end abutting on each end surface of the permanent magnet. Item 2. A permanent magnet rotor for a rotating electric machine according to item 1. 3. A cylindrical permanent magnet is fitted inside the stator on which the winding is applied, and is fixed to the outer peripheral surface of the rotating shaft at a position facing the magnetic pole teeth of the stator. In the permanent magnet rotor of the rotating electric machine, a cylindrical cavity formed between the rotating shaft and the permanent magnet, and an outer periphery which is disposed at one axial end of the cavity and is fitted to the rotating shaft and has an outer periphery. A first cylindrical member that is loosely fitted to the permanent magnet; and a shaft that is fitted to the rotating shaft from the other axial end of the cavity and whose outer periphery is loosely fitted to the permanent magnet, and whose end face is the first cylindrical member. A second cylindrical member disposed at a predetermined gap from an end face of the cylindrical member, and a predetermined gap formed between the respective end faces of the cylindrical members; Between the surface and the inner peripheral surface of the permanent magnet, A permanent magnet rotor for a rotating electric machine, comprising: 4. A method according to claim 1, wherein each of the outer ends of the first and second cylindrical members is formed with a flange extending radially and having a tip abutting against each end face of the permanent magnet. The permanent magnet rotor for a rotating electric machine according to claim 3. 5. The permanent magnet rotor for a rotating electric machine according to claim 1, wherein the predetermined gap is arranged to be inclined with respect to the axis. 6. The width dimension of the predetermined gap is set so that 99.8% or more of a total magnetic flux that can pass without the gap can pass.
Or a permanent magnet rotor of the rotating electric machine according to 3. 7. The permanent magnet rotor of a rotating electric machine according to claim 1, wherein the predetermined gap is disposed at a substantially central portion in the axial direction of the permanent magnet. 8. The permanent magnet rotor for a rotating electric machine according to claim 2, wherein air vents are provided between both end faces of the permanent magnet and the respective flanges respectively contacting the both end faces. 9. A step of applying an adhesive to one end face forming a predetermined gap, and moving the other end face to the one end face side to form the predetermined gap, thereby forming an adhesive. 9. A method for filling an adhesive in a permanent magnet rotor of a rotating electric machine according to claim 1, further comprising a step of pressure-feeding a surplus part into a gap formed inside the permanent magnet to spread it.