阅读说明：本技术 永磁体表面附着型旋转机的转子及其制造方法 (Rotor of permanent magnet surface-attached rotary machine and method for manufacturing same ) 是由 东义高 于 2019-06-26 设计创作，主要内容包括：提供了一种永磁体表面附着型旋转机的转子和一种用于制造永磁体表面附着型旋转机的转子的方法,借此,预先磁化的永磁体可容易地固定在合适位置,同时最小化成本。永磁体表面附着型旋转机的转子包括：柱形转子轴11；多个柱状引导件13,它们设置成沿转子轴11的轴向方向延伸,并沿转子轴的圆周方向等间隔地布置；以及永磁体12,永磁体被预先磁化并且在转子轴的表面上安装在相邻引导件13之间,其中：引导件13形成为使得其轴向长度比安装永磁体12的区域的轴向长度长；引导件13设置在转子轴11的表面上以便从安装永磁体12的区域沿轴向方向朝向两侧凸出,从安装永磁体12的区域沿轴向方向凸出的凸出部分13a、13b固定至转子轴11。(Provided are a rotor of a permanent magnet surface attachment type rotary machine and a method for manufacturing the rotor of the permanent magnet surface attachment type rotary machine, by which pre-magnetized permanent magnets can be easily fixed in place while minimizing costs. The rotor of a permanent magnet surface-attached rotary machine includes: a cylindrical rotor shaft 11; a plurality of columnar guides 13 provided to extend in the axial direction of the rotor shaft 11 and arranged at equal intervals in the circumferential direction of the rotor shaft; and permanent magnets 12, which are pre-magnetized and mounted between adjacent guides 13 on the surface of the rotor shaft, wherein: the guide 13 is formed such that its axial length is longer than that of the region where the permanent magnet 12 is mounted; the guide members 13 are provided on the surface of the rotor shaft 11 so as to project from the region where the permanent magnets 12 are mounted toward both sides in the axial direction, and projecting portions 13a, 13b projecting from the region where the permanent magnets 12 are mounted in the axial direction are fixed to the rotor shaft 11.)

1. A rotor of a permanent magnet surface attachment type rotary machine, comprising:

a cylindrical rotor shaft;

a plurality of columnar guides extending in an axial direction of the rotor shaft and arranged at equal intervals in a circumferential direction of the rotor shaft;

permanent magnets, each of which is pre-magnetized and mounted on a surface of the rotor shaft between adjacent guides;

wherein: an axial length of the guide member is longer than an axial length of a region where the permanent magnet is mounted, the guide member is arranged on a surface of the rotor shaft such that the guide member protrudes from the region where the permanent magnet is mounted toward both sides in the axial direction, and a protruding portion of the guide member protruding from the region where the permanent magnet is mounted in the axial direction is fixed to the rotor shaft by a fixing device.

2. The rotor of a permanent magnet surface attachment type rotary machine according to claim 1, wherein: the fixing device is annularly formed and includes two ring clamps each having a plurality of guide fixing grooves equally spaced in the circumferential direction for fixing the protrusion portion.

3. The rotor of a permanent magnet surface attachment type rotary machine according to claim 1 or 2, wherein: the permanent magnet has magnet side surfaces which are planes that are located on both sides in the circumferential direction and are parallel to each other, an

Wherein: the guide is formed in a rectangular parallelepiped shape.

4. The rotor of a permanent magnet surface attachment type rotary machine according to any one of claims 1 to 3, wherein: the guide is made of resin, and

wherein: the rotor shaft has a plurality of guide insertion grooves formed on the surface of the rotor shaft in the axial direction, into which the guides can be inserted.

5. A method for manufacturing a rotor of a permanent magnet surface-attachment type rotary machine, the rotor comprising:

a cylindrical rotor shaft;

a plurality of columnar guides extending in an axial direction of the rotor shaft and arranged at equal intervals in a circumferential direction of the rotor shaft;

permanent magnets, each of which is pre-magnetized and mounted on a surface of the rotor shaft between adjacent guides;

wherein: arranging the guide member formed longer than an axial length of a region where the permanent magnet is mounted to protrude from the region where the permanent magnet is mounted toward both sides in the axial direction;

wherein: fixing a protruding portion of the guide member protruding in the axial direction from the region where the permanent magnet is mounted to the rotor shaft, an

Wherein: the permanent magnets are fixed between the guides adjacent in the circumferential direction.

6. The method for manufacturing a rotor of a permanent magnet surface attachment type rotary machine according to claim 5, wherein: fixing the protrusion portion to the rotor shaft by two ring clamps each having a plurality of guide fixing grooves equally spaced in the circumferential direction, an

Wherein: after the permanent magnets are fixed between the guides adjacent in the circumferential direction, the ring clamp is removed.

7. The method for manufacturing a rotor of a permanent magnet surface attachment type rotary machine according to claim 5 or 6, wherein: the permanent magnet has magnet side surfaces which are planes that are located on both sides in the circumferential direction and are parallel to each other, an

Wherein: the guide is formed in a rectangular parallelepiped shape.

8. The method for manufacturing a rotor of a permanent magnet surface-attachment type rotary machine according to any one of claims 5 to 7, wherein: the rotor shaft has a plurality of guide insertion grooves formed on the surface thereof in the axial direction, an

Wherein: the guide is made of resin, and the protruding portion is fixed to the rotor shaft under a condition that the guide is inserted into the guide insertion groove.

Technical Field

The present invention relates to a rotor of a permanent magnet surface attachment type rotary machine and a method for manufacturing the rotor.

Background

Heretofore, a method of attaching a magnet produced by magnetizing a magnet material as a single body to a rotor shaft (magnet single body magnetizing method) has been known.

In this way, in the case of attaching a magnet produced by magnetizing a magnet material as a single body to a rotor shaft, in order to prevent the magnet and another magnet positioned adjacently in the circumferential direction from attracting and moving each other, as shown in fig. 8, the rotor shaft 101 is formed with magnet fixing grooves 101a at equal intervals in the circumferential direction on its surface, and magnets 102 are inserted and fixed in the grooves 101 a. The groove 101a is provided by directly machining the rotor shaft 101 or by attaching a silicon steel plate core formed with a groove to the rotor shaft 101.

Also, in order to prevent adjacent magnets from attracting each other due to the attractive force of the magnets and deviating from their positions in the circumferential direction, it is known that guides extending in the axial direction are attached at equal intervals in the circumferential direction. (see, for example, patent document 1 below).

Documents of the prior art

Patent document

Patent document 1: japanese patent application laid-open No. 2007-37288

Disclosure of Invention

Object of the invention

However, as described above, in the method of directly processing the rotor shaft so as to form the magnet fixing groove or attaching the silicon steel plate core formed with the groove to the rotor shaft, there is a problem in that the mechanical processing load and cost increase.

Also, in the case where the position of the magnet in the circumferential direction is determined by using the guide, a method of fixing the guide to the rotor shaft by a screw is employed. However, in the case where the width of the guide in the circumferential direction is small (in the case where the distance between the magnets arranged adjacently in the circumferential direction is narrow), there is also a problem that an inexpensive and ready screw cannot be employed, and a dedicated screw must be used, thereby increasing the cost.

In view of this, an object of the present invention is to provide a rotor of a permanent magnet surface-attachment type rotary machine, in which a pre-magnetized permanent magnet can be easily fixed in position while limiting the cost, and a method for manufacturing the rotor.

Means for solving the task

The rotor of a permanent magnet surface attachment type rotary machine according to the first invention for solving the above-described task includes:

a cylindrical rotor shaft;

a plurality of columnar guides extending in an axial direction of the rotor shaft and arranged at equal intervals in a circumferential direction of the rotor shaft;

permanent magnets, each of which is pre-magnetized and mounted on a surface of the rotor shaft between adjacent guides;

wherein: an axial length of the guide member is longer than an axial length of a region where the permanent magnet is mounted, the guide member is arranged on a surface of the rotor shaft such that the guide member protrudes from the region where the permanent magnet is mounted toward both sides in an axial direction, and a protruding portion of the guide member protruding from the region where the permanent magnet is mounted in the axial direction is fixed to the rotor shaft by a fixing device.

In the first invention, the rotor of a permanent magnet surface-mounted type rotary machine according to the second invention for solving the above-described problems is characterized in that: the fixing device is annularly formed and includes two ring clamps each having a plurality of guide fixing grooves equally spaced in a circumferential direction for fixing the protrusion portion.

In the first or second invention, the rotor of the permanent magnet surface-attached rotary machine according to the third invention for solving the above-described problems is characterized in that: the permanent magnet has magnet side surfaces which are planes on both sides in a circumferential direction and parallel to each other, an

The guide is formed in a rectangular parallelepiped shape.

In any one of the first to third inventions, the rotor of a permanent magnet surface-mount type rotary machine according to the fourth invention for solving the above-described problems is characterized in that: the guide is made of resin, and

the rotor shaft has a plurality of guide insertion grooves formed on a surface thereof in an axial direction, into which the guides can be inserted.

In the method for manufacturing a rotor of a permanent magnet surface attachment type rotary machine according to the fifth invention for solving the above-described task, the rotor includes:

a cylindrical rotor shaft;

a plurality of columnar guides extending in an axial direction of the rotor shaft and arranged at equal intervals in a circumferential direction of the rotor shaft;

permanent magnets, each of which is pre-magnetized and mounted on a surface of the rotor shaft between adjacent guides;

wherein: arranging the guide member formed longer than an axial length of a region where the permanent magnet is mounted to protrude from the region where the permanent magnet is mounted toward both sides in an axial direction;

wherein: fixing a protruding portion of the guide member protruding in an axial direction from the region where the permanent magnet is mounted to the rotor shaft, and fixing the permanent magnet between circumferentially adjacent guide members.

In a fifth invention, the method for manufacturing a rotor of a permanent magnet surface attachment type rotary machine according to the sixth invention for solving the above-described task is characterized in that: fixing the protrusion portion to the rotor shaft by two ring clamps each having a plurality of guide fixing grooves equally spaced in a circumferential direction, an

After the permanent magnets are fixed between circumferentially adjacent guides, the ring clamp is removed.

In the fifth or sixth invention, the method for manufacturing a rotor of a permanent magnet surface attachment type rotary machine according to the seventh invention for solving the above-described task is characterized in that: the permanent magnet has magnet side surfaces which are planes on both sides in a circumferential direction and parallel to each other, an

The guide is formed in a rectangular parallelepiped shape.

In any one of the fifth to seventh inventions, the method for manufacturing a rotor of a permanent magnet surface attachment type rotary machine according to the eighth invention for solving the above-described task is characterized in that: the rotor shaft has a plurality of guide insertion grooves formed on a surface thereof in an axial direction, an

The guide is made of resin, and the protruding portion is fixed to the rotor shaft under a condition that the guide is inserted into the guide insertion groove.

Advantageous effects of the invention

With the rotor of a permanent magnet surface-attachment type rotary machine and the method for manufacturing the same according to the present invention, it is possible to easily fix the permanent magnets magnetized in advance in place while limiting the cost.

Drawings

Fig. 1 is a perspective view showing a rotor of a permanent magnet surface-attachment type rotary machine according to a first embodiment of the present invention;

FIG. 2 is a longitudinal cross-sectional view of FIG. 1;

fig. 3 is a perspective view showing a rotor of a permanent magnet surface attachment type rotary machine according to a second embodiment of the present invention;

FIG. 4 is a cross-sectional view of the ring clamp shown in FIG. 3;

FIG. 5 is a cross-sectional view of the ring clamp shown in FIG. 4 taken along line V-V;

fig. 6 is a sectional view showing a main part of a rotor of a permanent magnet surface mount type rotary machine according to a third embodiment of the present invention;

fig. 7 is a sectional view showing a main portion of a rotor of a permanent magnet surface mount type rotary machine according to a fourth embodiment of the present invention; and

fig. 8 is a sectional view showing a rotor of a conventional permanent magnet surface attachment type rotary machine.

Detailed Description

A rotor of a permanent magnet surface-attachment type rotating machine and a method for manufacturing the rotor according to a first embodiment of the present invention will be described below using the accompanying drawings.

First embodiment

A rotor of a permanent magnet surface-attachment type rotating machine and a method for manufacturing the rotor according to a first embodiment of the present invention will be described in detail below using fig. 1 and 2.

As shown in fig. 1 and 2, the rotor 10 of the present embodiment is configured to include: a cylindrical rotor shaft 11; a plurality of substantially plate-shaped permanent magnets 12, the permanent magnets 12 being fixed to a surface of the rotor shaft 11; and a plurality of column guides 13, the column guides 13 being used to determine the position of the permanent magnet 12.

The magnet is magnetized in advance, and the bottom surface 12a of the magnet to be fixed to the rotor shaft 11 has an arc shape along the shape of the rotor shaft 11.

The guide 13 is arranged so that: its length in the longitudinal direction (axial direction) is longer than the axial length of the region where the permanent magnets are mounted, which is determined according to the number of permanent magnets 12 to be arranged in the axial direction (hereinafter, in the present embodiment, the number of magnet arrangements is six); and both end portions of the guide 13 protrude from the permanent magnet 12 in the axial direction (hereinafter, the portions of the guide 13 protruding from the permanent magnet 12 in the axial direction are referred to as protruding portions 13a, 13 b).

In the present embodiment, ten guide members 13 are arranged on the surface of the rotor shaft 11 at equal intervals in the circumferential direction so as to extend in the axial direction, respectively. The projecting portions 13a, 13b are fixed to the rotor shaft 11 by fixing means.

Then, a plurality of (six in the present embodiment) the above-described permanent magnets 12 magnetized in advance are arranged in the axial direction between the guides 13, 13 adjacent in the circumferential direction without a space between the permanent magnets, and the permanent magnets 12 are fixed to the rotor shaft 11 by an adhesive, thereby making a rotor of a permanent magnet surface-attachment type rotary machine.

The fixing means may be a method of screwing, bonding, welding, or using a jig, as long as the projecting portions 13a, 13b can be fixed to the surface of the rotor shaft 11.

According to the rotor of the permanent magnet surface attachment type rotary machine according to the present embodiment thus configured and the method for manufacturing the same, it is possible to prevent positional deviation of the permanent magnets 12, the permanent magnets 12 being to be fixed to the rotor shaft 11 by using the guide 13. Therefore, the formation of the slots for the permanent magnets 12 in the rotor shaft 11 can be omitted in order to limit the cost. Further, the guide 13 is formed with the convex portions 13a, 13b, and the guide is configured such that the convex portions 13a, 13b can be fixed. Therefore, even in the case where the projecting portions 13a, 13b of the guide 13 are fixed by screwing, for example, no special screw needs to be used, thereby limiting the cost.

Second embodiment

A rotor of a permanent magnet surface attachment type rotary machine and a method for manufacturing the same according to a second embodiment of the present invention will be described in detail using fig. 3 to 5.

The present embodiment differs from the first embodiment described above in the means for fixing the guide 13 to the rotor shaft 11. The other structure is the same as the first embodiment. Therefore, the same components are denoted by the same reference numerals, and duplicate descriptions are omitted.

As shown in fig. 3 to 5, in the present embodiment, as a measure for fixing the projecting portions 13a, 13b of the guide 13 to the rotor shaft 11, a ring jig 20 is used. The ring jig 20 is formed in a ring shape and is provided at its inner circumferential side with a guide fixing groove 20a for fixing the projecting portions 13a, 13b of the guide 13. The axial length of the guide fixing groove 20a is shorter than the axial length of the ring clamp 20.

In the present embodiment, each of the projecting portions 13a, 13b of the guide 13 is inserted into the guide fixing groove 20a of the ring clamp 20, and the ring clamp 20 is fixed to the rotor shaft 11 by screwing under the condition that the axial distance between the two ring clamps 20 is adjusted to a distance capable of securing a space for adhering the permanent magnets 12. Also, the guide 13 is fixed to the rotor shaft 11 by an adhesive.

Then, a plurality of (six in the present embodiment) pre-magnetized permanent magnets 12 are arranged in the axial direction between the guides 13 adjacent in the circumferential direction with no space between the permanent magnets, and the permanent magnets 12 are fixed to the rotor shaft 11 by an adhesive, thereby making a rotor of a permanent magnet surface-attachment type rotary machine. After the permanent magnets 12 have been sufficiently fixed to the rotor shaft 11, the ring clamp 20 is removed.

Fig. 5 shows an example in which the ring clamp 20 is integrally formed. However, the ring clamp 20 may be formed by combining separate members, such as stacking together a ring member having a guide fixing groove passing through in the axial direction and a ring member having no groove.

According to the rotor of the permanent magnet surface attachment type rotary machine according to the present embodiment thus configured and the method for manufacturing the rotor, it is possible to easily fix the guide 13 to the surface of the rotor shaft 11 in addition to the advantageous effects of the first embodiment. Therefore, it is possible to shorten the time for fixing the guide 13 and prevent the axial displacement of the plurality of permanent magnets 12 arranged in the axial direction.

Third embodiment

A rotor of a permanent magnet surface-attachment type rotating machine and a method for manufacturing the same according to a third embodiment of the present invention will be described in detail using fig. 6.

In the present embodiment, the permanent magnet 14 and the guide member 15 shown in fig. 6 are used instead of the permanent magnet 12 and the guide member 13 of the above-described first embodiment. The other structure is similar to that of the first embodiment. Therefore, the same components are shown with the same reference numerals, and duplicate explanation is omitted.

As shown in fig. 6, in the present embodiment, the permanent magnet 14 is shaped such that a magnet side surface 14a on one side in the circumferential direction is parallel to a magnet side surface 14b on the other side in the circumferential direction of another magnet adjacent in the circumferential direction. Meanwhile, the guide 15 is formed in a rectangular parallelepiped shape in which its both end surfaces (guide-side surfaces) in the circumferential direction are parallel to each other.

The guides 15 thus formed are arranged on the surface of the rotor shaft 11 at equal intervals in the circumferential direction so as to extend in the axial direction, respectively, and the projecting portions (not shown in the drawings) are fixed to the rotor shaft 11 by fixing means such as screwing, bonding, welding, or clamping.

Then, a plurality of permanent magnets 14 magnetized in advance are arranged in the axial direction between the guides 15 adjacent in the circumferential direction with no space therebetween, and the permanent magnets 14 are fixed to the rotor shaft 11 by an adhesive, thereby making a rotor of a permanent magnet surface-attachment type rotary machine.

According to the rotor of the permanent magnet surface attachment type rotary machine according to the present embodiment thus configured and the method for manufacturing the same, in addition to the advantageous effects of the first embodiment, it is possible to employ an inexpensive rectangular parallelepiped guide as the guide 15, thereby reducing costs.

This embodiment shows an example in which the permanent magnet 14 and the guide member 15 shown in fig. 6 are used instead of the permanent magnet 12 and the guide member 13 of the above-described first embodiment. However, it goes without saying that the permanent magnet 14 and the guide member 15 shown in fig. 6 may be employed instead of the permanent magnet 12 and the guide member 13 of the above-described second embodiment.

Fourth embodiment

A rotor of a permanent magnet surface-attachment type rotating machine and a method for manufacturing the rotor according to a fourth embodiment of the present invention will be described in detail using fig. 7.

In the present embodiment, the rotor shaft 16 and the guide 17 shown in fig. 7 are used instead of the rotor shaft 11 and the guide 13 described in the above-described first embodiment. The other structure is similar to that of the first embodiment. Therefore, the same components are shown with the same reference numerals, and duplicate explanation is omitted.

As shown in fig. 7, in the present embodiment, the rotor shaft 16 is formed with a guide insertion groove 16a for inserting the guide 17. The guide insertion grooves 16a are formed at equal intervals in the circumferential direction so as to extend in the axial direction.

The guide 17 is made of resin, and projections (not shown in the drawings) on both sides in the axial direction of the guide are fixed to the rotor shaft 16 by fixing means such as screwing, bonding, welding, or a jig under the condition that the guide is inserted into the guide insertion groove 16 a.

Then, a plurality of pre-magnetized permanent magnets 12 are arranged in the axial direction between the guides 17, 17 adjacent in the circumferential direction without a space therebetween, and the permanent magnets 12 are fixed to the rotor shaft 16 by an adhesive, thereby making a rotor of a permanent magnet surface-attachment type rotary machine.

According to the rotor of the permanent magnet surface attachment type rotary machine according to the present embodiment thus configured and the method for manufacturing the rotor, even if the guide 17 is made of resin, the guide 17 can be prevented from warping in the circumferential direction due to the attractive force or repulsive force of the permanent magnets 12. Also, the width of the guide insertion groove 16a for inserting the guide 17 in the circumferential direction and the depth in the radial direction are both made smaller than in the case where the groove for the permanent magnet 12 is formed in the rotor shaft 11. Therefore, the machining labor time can be reduced to limit the machining cost. In the case of using the guide 17 made of resin, the following advantages can also be obtained as compared with the metal guide: the advantage of not generating eddy current loss, and high resistance to centrifugal force due to its light weight.

This embodiment shows an example in which the rotor shaft 16 and the guide 17 shown in fig. 7 are used instead of the rotor shaft 11 and the guide 13 described in the first embodiment. However, it goes without saying that the rotor shaft 16 and the guide 17 shown in fig. 7 may be employed instead of the rotor shaft 11 and the guide 13 of the above-described second embodiment or the rotor shaft 11 and the guide 15 of the above-described third embodiment.

Description of reference numerals

10: a rotor;

11. 16: a rotor shaft;

12. 14: a permanent magnet;

12 a: a bottom surface;

13. 15, 17: guide piece

13a, 13 b: projecting part

14a, 14 b: a magnet-side surface;

15a, 15 b: a guide-member-side surface;

16 a: guide insertion groove

20: ring clamp

20 a: guide fixing groove