JP2007159361A - Rotor and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To avoid beforehand concentration of stresses on a permanent magnet even if high-speed rotation is performed. <P>SOLUTION: A rotor, over a nearly total area of its gap between at least circumferential surfaces 6a, 6b of the permanent magnet 6 and circumferential surfaces 11a, 11b of an opening 11, is coated (filled) with an adhesive agent 12 (a filling member). Consequently, a nearly total area of the circumferential surfaces 6a, 6b of the permanent magnet 6 is constituted so that the area is fixed to the circumferential surfaces 11a, 11b of the opening 11 through the adhesive agent 12. Such constitution is provided as an applied region and a non-applied region of the adhesive agent 12 are not intermingled in an axial direction of the permanent magnet 6. Deterioration of characteristics of the rotor 1 is thereby prevented, and reliability is improved. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a rotor in which a permanent magnet is inserted into an opening substantially parallel to the axial direction of a rotating shaft, and a method for manufacturing the same.

2. Description of the Related Art Conventionally, there is provided a rotor in which an opening is formed in a direction substantially parallel to the axial direction of the rotating shaft, and a permanent magnet is inserted into the rotating core provided rotatably about the rotating shaft. (For example, refer to Patent Document 1).
JP 2001-339919 A

  In this kind of rotor, the size of the inner periphery of the opening formed in the rotating iron core is slightly larger than the size of the outer periphery of the permanent magnet because it is necessary to make it easier to insert the permanent magnet. Yes. Therefore, in a state where the permanent magnet is inserted into the opening, a slight gap is formed between the opening and the permanent magnet, so that the permanent magnet does not swing (does not rattle). It is necessary to fix the magnet to the opening. As a method of fixing the permanent magnet to the opening, for example, there is a method of fixing the permanent magnet with an adhesive. This method is to apply an adhesive to a permanent magnet and insert it into the opening.

  By the way, the method of applying an adhesive to such a permanent magnet and fixing the permanent magnet to the opening is in the case of manufacturing a rotor having a long axial direction of the rotating shaft over substantially the entire axial direction of the rotating shaft. Because of the difficulty in applying the adhesive, the adhesive is applied partially or intermittently along the axial direction of the permanent magnet, rather than being applied almost entirely along the axial direction of the permanent magnet. Usually, it is applied. Therefore, the permanent magnet is fixed to the opening at a partial or intermittent location along the axial direction.

  However, in the configuration in which the permanent magnet is fixed to the opening at a partial or intermittent location along the axial direction, the location where the permanent magnet is fixed to the opening and the location where it is not fixed, that is, for example, If the permanent magnet is fixed to the opening with an adhesive, the location where the adhesive is applied and the location where the adhesive is not applied are mixed along the axial direction. When the child rotates and centrifugal force acts on the permanent magnet, stress concentration may occur in the permanent magnet at the boundary between the adhesive application region and the non-application region.

  In this case, for example, in industrial rotating electrical machines where the required number of rotations is small, the centrifugal force acting on the permanent magnet fixed to the rotor is small, so even if stress concentration occurs in the permanent magnet at the above-mentioned boundary, The degree of stress concentration is small and does not cause any problem. However, for example, in a rotating electrical machine for automobiles that requires a large number of rotations, the centrifugal force acting on the permanent magnet fixed to the rotor is large, so the degree of stress concentration generated in the permanent magnet at the above-described boundary is large. The large stress concentration causes cracks in the permanent magnets or breaks the permanent magnets, thereby deteriorating the characteristics and reliability of the rotor.

  The present invention has been made in view of the above-described circumstances, and its purpose is to prevent stress concentration from occurring in the permanent magnet even when it is rotated at a high speed. It is an object of the present invention to provide a rotor that can prevent deterioration of characteristics and improve reliability, and a method for manufacturing the same.

  The rotor according to claim 1 is provided so as to be rotatable about a rotation axis and has an opening that is open in a direction substantially parallel to the axial direction of the rotation axis, and at least in the circumferential direction. In a rotor comprising a permanent magnet inserted into the opening so as to leave a gap between the surface and the circumferential surface of the opening, the filling member fills substantially the entire area of the gap Thus, substantially the entire circumferential surface of the permanent magnet is fixed to the circumferential surface of the opening through the filling member.

  According to a fifth aspect of the present invention, there is provided the rotor according to the fifth aspect, wherein the rotor core is provided so as to be rotatable about the rotation shaft and has an opening that opens in a direction substantially parallel to the axial direction of the rotation shaft, A rotor having a permanent magnet inserted into the opening so as to leave a gap between the surface and the circumferential surface of the opening, and at least one of the opening and the permanent magnet A plurality of support members extending in the axial direction having a length corresponding to the length in the axial direction of the permanent magnet are formed in any one of the circumferential surface of the permanent magnet and the circumferential surface of the opening. At least one of them is supported by the plurality of support members over the entire length in the axial direction, so that the circumferential surface of the permanent magnet is fixed to the circumferential surface of the opening. Has characteristics.

  According to the rotor according to claim 1, by realizing a configuration in which the filling region and the non-filling region of the filling member are not mixed along the axial direction of the permanent magnet, the rotor is rotated at a high speed and becomes permanent. Even if a large centrifugal force acts on the magnet, it is possible to prevent stress concentration from occurring in the permanent magnet, thereby preventing deterioration of the rotor characteristics and ensuring reliability. Improvements can be made.

  According to the rotor of the fifth aspect, the rotor is rotated at a high speed by realizing a configuration in which the support region and the non-support region by the plurality of support members are not mixed along the axial direction of the permanent magnet. Even if a large centrifugal force acts on the permanent magnet, the stress generated in the permanent magnet can be dispersed in the axial direction by a plurality of support members and stress concentration can be avoided in advance. It is possible to prevent the characteristics of the child from being lowered and to improve the reliability.

(First embodiment)
A first embodiment of the present invention will be described below with reference to FIGS.
FIG. 1 shows a longitudinal side surface of the rotor. The rotor 1 is housed in a motor frame (not shown) of a rotating electrical machine, and includes a rotating iron core 2, fastening plates 3 and 4, a rotating shaft 5 and a permanent magnet 6.

  The rotating iron core 2 is configured by laminating a plurality of iron core plates 7, and an insertion hole 2 a through which the rotating shaft 5 can be inserted is provided at the center. The fastening plates 3 and 4 are attached so as to sandwich the rotating iron core 2, and similarly to the rotating iron core 2 described above, insertion holes 3 a and 4 a through which the rotating shaft 5 can be inserted are provided at the center. The rotating shaft 5 is formed long in the axial direction, and a male screw portion 9 to which a nut 8 is screwed is provided on one end 5a side (right side in FIG. 1). Further, on the other end 5 b side (left side in FIG. 1) of the rotating shaft 5, a flange portion 10 having a diameter smaller than that of the rotating iron core 2 and the fastening plate 3 is provided.

  The rotating shaft 5 is connected to the insertion holes 3a, 2a, 4a from the other end side to one end side (from the left side to the right side in FIG. 1) with the fastening plates 3 and 4 attached to the rotating iron core 2. The male threaded portion 9 is tightened by a nut 8 on the one end 5a side. The rotating shaft 5 is rotatably supported at both ends 5a and 5b by bearings (not shown) provided on the motor frame, so that the rotor 1 is connected to the rotating shaft 5 in the motor frame. Can be rotated around the center of rotation.

  A plurality of (only two are shown in FIG. 1) openings 11 are provided in the above-described rotating core 2 along the circumferential direction of the rotating core 2. The opening 11 opens in a substantially rectangular shape in a direction substantially parallel to the axial direction of the rotation shaft 5. The permanent magnet 6 has a substantially rectangular shape that is long in the axial direction of the rotary shaft 5, and is inserted into the opening 11. Here, the size of the inner periphery of the opening 11 is slightly larger than the size of the outer periphery of the permanent magnet 6, and the permanent magnet 6 is inserted into the opening 11 when the rotor 1 is manufactured. It is easy to do. Therefore, in a state where the permanent magnet 6 is inserted into the opening 11, a gap exists between the permanent magnet 6 and the opening 11.

  In the first embodiment, the adhesive is provided over substantially the entire region of the gap between the circumferential surfaces 6 a and 6 b of the permanent magnet 6 and the circumferential surfaces 11 a and 11 b of the opening 11. 12 (corresponding to a filling member) is applied (filled), and substantially the entire area of the circumferential surfaces 6 a and 6 b of the permanent magnet 6 is fixed to the circumferential surfaces 11 a and 11 b of the opening 11 via the adhesive 12. Has been. In addition, the adhesive 12 is also applied to a portion between the front surface 6c of the permanent magnet 6 (the front surface on the left side of the permanent magnet 6 in FIG. 1) and the fastening plate 3 in the gap described above. Also in the portion, the permanent magnet 6 is fixed to the opening 11.

Next, a method for manufacturing the rotor 1 having the above-described configuration, in particular, a method for fixing the permanent magnet 6 to the opening 11 of the rotary core 2 will be described with reference to FIG. 2A to 2D are longitudinal side views partially showing the upper side of the rotating shaft 5 in the rotor 1 shown in FIG. Also here
(1) Step of applying adhesive 12 to one end side of opening 11 (2) Step of applying adhesive 12 to circumferential surfaces 11a and 11b of opening 11 while inserting permanent magnet 6 into opening 11 A description will be made sequentially.
(1) Step of applying adhesive 12 to one end of opening 11 First, as shown in FIG. 2A, an appropriate amount of adhesive 12 is placed on the tip of a spatula 13 and the spatula 13 is turned upside down. The tip of the spatula 13 is inserted into one end of the opening 11 with the adhesive 12 facing down. Then, the lower surface of the spatula 13 (the surface on which the adhesive 12 is placed) is placed on one circumferential surface on the one end side of the opening 11 (the circumferential surface 11a located on the lower side in FIG. 2A). The adhesive 12 placed on the tip of the spatula 13 is applied to one circumferential surface on one end side of the opening 11 by pressing.

Next, the same amount of adhesive 12 as that of the previous time is placed on the tip of the spatula 13, and at this time, after rotating the rotor 1 upside down (in this state, the circumferential surface 11 b is located on the lower side), the spatula 13 Is turned upside down and the tip of the spatula 13 is inserted into one end of the opening 11. Then, by pressing the lower surface of the spatula 13 (the surface on which the adhesive 12 is placed) against the other circumferential surface (in this case, the circumferential surface 11 b) on one end side of the opening 11, The placed adhesive 12 is applied to the other circumferential surface on one end side of the opening 11. In the above, the case where the adhesive 12 is applied by flipping the spatula 13 upside down and pressing the lower surface of the spatula 13 downward has been described. Alternatively, the adhesive 12 may be applied by pressing the above-mentioned surface upward. Which method should be adopted may be determined in consideration of, for example, the viscosity of the adhesive 12.
(2) Step of applying the adhesive 12 to the circumferential surfaces 11a and 11b of the opening 11 while inserting the permanent magnet 6 into the opening 11 Next, as shown in FIG. The portion 11 is inserted into the opening 11 from one end side to the other end side (see arrow A in FIG. 2B). Then, in the process of inserting the permanent magnet 6 into the opening 11 from one end side to the other end side, as shown in FIG. 2 (c), the adhesive 12 extends from one end side to the other end side of the opening portion 11. Then, the circumferential surfaces 11a and 11b (the circumferential surfaces 6a and 6b extending from the other end side to the one end side of the permanent magnet 6) are applied. Further, on the front surface 6 c of the permanent magnet 6, a part of the adhesive 12 is pushed out toward the other end side of the opening 11.

  Then, as shown in FIG. 2 (d), the entire permanent magnet 6 is inserted into the opening portion 11, whereby the circumferential surfaces 6 a and 6 b of the permanent magnet 6 and the circumferential surfaces 11 a and 11 b of the opening portion 11. The adhesive 12 is applied over substantially the entire area between the two. Then, by disposing the fastening plate 3 on the other end side of the opening 11 (the other end side of the rotating iron core 2), the adhesive 12 existing on the other end side of the permanent magnet 6 is removed from the front end surface of the permanent magnet 6. It will be in the state apply | coated (filled) to the part between 6c and the fastening plate 3. FIG.

  As described above, according to the first embodiment, at least the circumferential surfaces 6 a and 6 b of the permanent magnet 6 in the gap between the permanent magnet 6 and the opening 11 and the circumferential direction of the opening 11. By applying the adhesive 12 over substantially the entire area of the gap between the surfaces 11 a and 11 b, the substantially entire area of the circumferential surfaces 6 a and 6 b of the permanent magnet 6 passes through the adhesive 12 in the circumferential direction of the opening 11. Since it is configured to be fixed to the surfaces 11a and 11b, by realizing a configuration in which the application region and the non-application region of the adhesive 12 are not mixed along the axial direction of the permanent magnet 6, the rotor 1 is Even if a large centrifugal force acts on the permanent magnet 6 after being rotated at a high speed, it is possible to avoid stress concentration from occurring in the permanent magnet 6, thereby preventing deterioration of the characteristics of the rotor 1. And improve reliability It can be.

  In addition, by applying the adhesive 12 to a portion between the tip surface 6 c of the permanent magnet 6 and the fastening plate 3 in the gap, the permanent magnet 6 is fixed to the opening 11 in the portion. Therefore, when the rotor 1 is rotated at a high speed and a centrifugal force acts on the permanent magnet 6, the permanent magnet 6 can be supported also on the tip surface 6c.

  In the present embodiment, optimally, the adhesive 12 is applied to substantially the entire circumferential surfaces 6a and 6b of the permanent magnet 6 so that the substantially entire circumferential surfaces 6a and 6b of the permanent magnet 6 are covered. The state fixed to the circumferential surface 11a, 11b of the opening part 11 via the adhesive agent 12 is preferable. However, in the process of actually manufacturing the rotor 1, it may be difficult to apply the adhesive to substantially the entire area of the circumferential surfaces 6 a and 6 b of the permanent magnet 6. On the other hand, even if the inventor does not cover substantially the entire area of the circumferential surfaces 6a and 6b of the permanent magnet 6, an area of about 80% of the circumferential surfaces 6a and 6b covers the circumferential surface 11a of the opening 11. , 11b, it has been experimentally confirmed that the same effect as described above can be obtained.

  Therefore, in the first embodiment, as shown in FIG. 3, the rotor 1 may be configured with the adhesive 12 applied to about 80% of the circumferential surfaces 6 a and 6 b of the permanent magnet 6. good. In this case, when the width w1 of the spatula 13 is set to about 80% of the width w2 of the permanent magnet 6 and the adhesive 12 is applied to one end side of the opening 11 using the spatula 13 (FIG. ) And (b)), the adhesive 12 is applied with a width w1 of about 80% of the width w2 of the permanent magnet 6. When the permanent magnet 6 is inserted into the opening 11 in this state, the adhesive 12 applied to one end of the opening 11 is applied to the circumferential surfaces 6a and 6b of the permanent magnet 6 with the width w1 of the spatula 13. Thus, the rotor 1 in which the adhesive 12 is applied to the region of about 80% of the circumferential surfaces 6a and 6b of the permanent magnet 6 can be manufactured. In FIG. 3, the area where the adhesive 12 is applied is indicated by hatching.

  If the viscosity of the adhesive 12 is too small, the adhesive 12 may enter between the iron core plates 7 constituting the rotating iron core 2. Conversely, if the viscosity is too large, the permanent magnet 6 and the opening 11 may be used. There is a risk that it may be difficult to apply smoothly. Therefore, the viscosity of the adhesive 12 is optimally preferably in the range of 0.1 [Pa · S] to 5000 [Pa · S].

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIG.
In 2nd Embodiment, as shown to Fig.4 (a), the adhesive 22 (equivalent to a filling member) is used for the one end side (right side in Fig.4 (a)) of the opening part 11 using the dispenser 21 instead of the spatula 13. FIG. ) Is applied. Next, as shown in FIGS. 4 (b) to 4 (d), in the same manner as described in the first embodiment, the adhesive 22 is inserted around the opening 11 while the permanent magnet 6 is inserted into the opening 11. Are applied to the directional surfaces 11a and 11b (the circumferential surfaces 6a and 6b of the permanent magnet 6).
According to the second embodiment, the adhesive 22 can be quantitatively applied by the dispenser 21, and the application amount of the adhesive 22 can be easily managed.

(Third embodiment)
Next, a third embodiment of the present invention will be described with reference to FIGS. In the first and second embodiments described above, substantially the entire area of the circumferential surfaces 6a and 6b of the permanent magnet 6 is formed on the circumferential surfaces 11a and 11b of the opening 11 via the adhesives 12 and 22, respectively. In the third embodiment, the substantially entire region of the circumferential surface of the permanent magnet is fixed to the circumferential surface of the opening via the sheet-like member. The thing is described. Hereinafter, a different part from 1st Embodiment mentioned above is demonstrated.

  As shown in FIG. 5C, the rotating core 32 of the rotor 31 is provided with an opening 33 that opens along the circumferential direction of the rotating core 32 and in a direction substantially parallel to the axial direction of the rotating shaft 5. The permanent magnet 34 is inserted into the opening 33. Then, a sheet-like member 35 (corresponding to a filling member) is inserted over substantially the entire region between the circumferential surfaces 34a and 34b of the permanent magnet 34 and the circumferential surfaces 33a and 33b of the opening 33 ( The substantially whole area of the circumferential surfaces 34 a and 34 b of the permanent magnet 34 is fixed to the circumferential surfaces 33 a and 33 b of the opening 33 via the sheet-like member 35. Further, the central portion 35a of the sheet-like member 35 is inserted between the tip surface 34c of the permanent magnet 34 and the fastening plate 3, and the permanent magnet 34 is fixed to the opening 33 also in this portion. ing.

Next, a method for manufacturing the rotor 31 having the above-described configuration, particularly a method for fixing the permanent magnet 34 to the opening 33 of the rotary core 32 will be described. Here,
(1) Step of placing the sheet-like member 35 on one end side of the opening 33 (2) Pressing the sheet-like member 35 against the circumferential surfaces 33 a and 33 b of the opening 33 while inserting the permanent magnet 34 into the opening 33 The steps will be described sequentially.
(1) Step of placing the sheet-like member 35 on one end side of the opening 33 First, as shown in FIG. 5A, the sheet-like member is placed on one end side of the opening 33 (right side in FIG. 5A). 35 is arranged. At this time, it arrange | positions so that the center part 35a of the sheet-like member 35 may oppose the one end side of the opening part 33. FIG. And the permanent magnet 34 is arrange | positioned so that the surface 34c of the front-end | tip of the permanent magnet 34 may touch the center part 35a of the sheet-like member 35. FIG.
(2) Step of pressing the sheet-like member 35 against the circumferential surfaces 33a and 33b of the opening 33 while inserting the permanent magnet 34 into the opening 33. Next, as shown in FIG. The permanent magnet 34 is inserted into the opening 33 from one end side to the other end side together with the sheet-like member 35 so that the central portion 35a of the permanent magnet 34 is pushed in by the tip surface 34c of the permanent magnet 34 (in FIG. 5B). (See arrow B). Then, in the process of inserting the permanent magnet 34 into the opening 33 from one end side toward the other end side, the sheet-like member 35 is moved from one end side to the other end side of the opening portion 33 in the circumferential surfaces 33a and 33b ( The permanent magnet 34 is pressed against the circumferential surfaces 34a and 34b) from the other end side to the one end side.

  And as shown in FIG.5 (c), by inserting the whole permanent magnet 34 in the opening part 33, the circumferential surface 34a, 34b of the permanent magnet 34 and the circumferential surface 33a, 33b of the opening part 33 are shown. The sheet-like member 35 is pressed over substantially the entire area between the two. Then, by disposing the fastening plate 3 on the other end side of the opening 33 (the other end side of the rotating iron core 2), the sheet-like member 35 existing on the other end side of the permanent magnet 34 is attached to the tip of the permanent magnet 34. It will be in the state inserted (filled) in the part between the surface 34c and the fastening plate 3. FIG.

  In place of the sheet-like member 35, a sheet-like member 36 (corresponding to a filling member) in which at least the portions in contact with the circumferential surfaces 34a, 34b of the permanent magnet 34 have an uneven shape as shown in FIG. 6 is used. Also good. According to such a configuration, when the permanent magnet 34 is inserted into the opening 33 together with the sheet-like member 36, the plurality of convex portions 37 of the sheet-like member 36 are deformed. The insertion resistance when inserting the magnet 34 into the opening 33 can be reduced. Further, the convex portion 37 described above may be provided in a portion of the sheet-like member 36 that is in contact with the circumferential surfaces 33 a and 33 b of the opening 33, or is in contact with the circumferential surfaces 34 a and 34 b of the permanent magnet 34. You may provide in the part of both a part and the part which contact | connects the surface 33a, 33b of the circumferential direction of the opening part 33. FIG.

  The material of the sheet-like member 35 may be any material that can be inserted into the gap between the permanent magnet 34 and the opening 33, and may be made of, for example, a rubber material or a paper material.

(Fourth embodiment)
Next, a fourth embodiment of the present invention will be described with reference to FIG. In the first embodiment described above, a configuration in which substantially the entire area of the circumferential surfaces 6a and 6b of the permanent magnet 6 is fixed is described. However, in the fourth embodiment, the circumferential direction of the permanent magnet 6 is described. A description will be given of a configuration in which substantially the entire area of the surface is not fixed, but the circumferential surface of the permanent magnet is fixed by being supported over the entire axial length of the rotating shaft. Hereinafter, description of the same parts as those in the first embodiment will be omitted, and different parts will be described.

  As shown in FIG. 7, a plurality (four in the fourth embodiment) of convex portions 44 (corresponding to support members) are provided in the opening 43 provided in the rotary core 42 of the rotor 41. 43 is provided integrally with the opening 43 (rotating iron core 42) so as to be paired on the surfaces 43a and 43b in the circumferential direction. Further, as shown in FIG. 7A, the convex portion 44 is provided in a ridge shape over the axial length of the opening 43, that is, at least the axial length of the permanent magnet 45. It has a length corresponding to this.

  The permanent magnet 45 is provided with a metal plating or paint film for protecting the permanent magnet 45 and the opening 43 on the surface thereof, thereby forming a surface treatment layer 46 (in each embodiment described above) Then, although explanation is omitted, the permanent magnet 6 is similarly surface-treated). The convex portion 44 described above has a distance h1 between the tip portions 44a of the convex portions 44 that are paired with each other larger than the thickness h2 of the permanent magnet 45 and includes the surface treatment layer 46. It is set to be smaller than the thickness h3. Therefore, the permanent magnet 45 is in a state where a part of the surface treatment layer 46 is scraped to the tip end portion 44 a of the convex portion 44 in the opening 43. And the circumferential surfaces 45a and 45b of the permanent magnet 45 are supported through the surface treatment layer 46 by the front-end | tip parts 44a of the some convex-shaped part 44 over the whole length of an axial direction, and a permanent magnet 45 circumferential surfaces 45 a and 45 b are fixed to circumferential surfaces 43 a and 43 b of the opening 43.

  As described above, according to the fourth embodiment, a plurality of convex portions 44 having a length corresponding to the axial length of the permanent magnet 45 and extending in the axial direction are formed on the opening 43 side. The circumferential surfaces 45 a and 45 b of the permanent magnet 45 are supported by the convex portion 44 over the entire length in the axial direction, so that the circumferential surfaces 45 a and 45 b of the permanent magnet 45 are arranged in the circumferential direction of the opening 43. Since it is configured to be fixed to the surfaces 43a and 43b, by realizing a configuration in which the support region and the non-support region by the plurality of convex portions 44 are not mixed along the axial direction of the permanent magnet 45, Even if the rotor 41 is rotated at a high speed and a large centrifugal force is applied to the permanent magnet 45, the stress generated in the permanent magnet 45 is dispersed in the axial direction by the plurality of convex portions 44 and stress concentration occurs. This can be avoided by It is possible to prevent deterioration of the characteristics of the child 41, also it is possible to improve the reliability.

The surface treatment layer 46 described above may be a relatively soft metal plating such as tin or aluminum, or may be a resin coat.
Further, the shape of the longitudinal side surface of the convex portion 44 on one end side of the opening 43 (the side on which the permanent magnet 45 is inserted, the right portion in FIG. 7A) is not an angular shape but an arc shape. You may do it. Thereby, when manufacturing the rotor 41 described above, the permanent magnet 45 can be easily inserted into the opening 43.

(Fifth embodiment)
Next, a fifth embodiment of the present invention will be described with reference to FIG. In the above-described fourth embodiment, the configuration in which the plurality of convex portions 44 are provided on the opening 43 side is described. However, in the fifth embodiment, the plurality of convex portions are permanent. The thing of the structure provided in the magnet side is described. Hereinafter, a different part from 4th Embodiment mentioned above is demonstrated.

  As shown in FIG. 8, a permanent magnet 54 is inserted into an opening 53 provided in the rotary core 52 of the rotor 51. In this permanent magnet 54, a plurality of (four in the fifth embodiment) convex portions 55 (corresponding to support members) are arranged in the circumferential direction of the permanent magnet 54 (surface treatment layer 56) via the surface treatment layer 56. Are provided in pairs on the surfaces 54a and 54b side. Further, as shown in FIG. 8A, the convex portion 55 is provided in a ridge shape over the axial length of the permanent magnet 54, that is, at least the axial length of the permanent magnet 54. It has a length corresponding to this. The permanent magnet 54 has the circumferential surfaces 53a and 53b of the opening 53 supported by the tip portions 55a of the plurality of convex portions 55 over the entire length in the axial direction. The circumferential surfaces 54 a and 54 b are fixed to the circumferential surfaces 53 a and 53 b of the opening 53.

Also in the rotor 51 having the above-described configuration, by realizing a configuration in which the support region and the non-support region by the plurality of convex portions 55 are not mixed along the axial direction of the permanent magnet 54, the rotor 51 can be operated at high speed. Even if a large centrifugal force is applied to the permanent magnet 54 by being rotated, it is possible to avoid the stress concentration from occurring by distributing the stress generated in the permanent magnet 54 in the axial direction by the plurality of convex portions 55. This can prevent the deterioration of the characteristics of the rotor 51, and can improve the reliability.
In addition, what is necessary is just to comprise as a material of the above-mentioned convex-shaped part 55, for example with aluminum or resin. Further, a string or the like may be wound along the axial direction of the permanent magnet 54.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal side view schematically showing a configuration of a rotor, showing a first embodiment of the present invention. The figure which shows the process of fixing a permanent magnet to the opening part of a rotor. The top view which shows the area | region where the adhesive agent was apply | coated in the surface of the circumferential direction of a permanent magnet FIG. 2 equivalent view showing the second embodiment of the present invention FIG. 2 equivalent view showing the third embodiment of the present invention Longitudinal side view of sheet-like member The figure which shows the 4th Embodiment of this invention, Comprising: The figure which shows the principal part of invention FIG. 7 equivalent view showing the fifth embodiment of the present invention

Explanation of symbols

In the drawings, 1 is a rotor, 2 is a rotating iron core, 5 is a rotating shaft, 6 is a permanent magnet, 6a and 6b are circumferential surfaces of the permanent magnet, 11 is an opening, and 11a and 11b are circumferential surfaces of the opening. Surface, 12 is an adhesive (filling member), 22 is an adhesive (filling member), 31 is a rotor, 32 is a rotating iron core, 33 is an opening, 33a and 33b are circumferential surfaces of the opening, and 34 is permanent. Magnets 34a and 34b are circumferential surfaces of the permanent magnet, 35 is a sheet-like member (filling member), 36 is a sheet-like member (filling member), 41 is a rotor, 42 is a rotating iron core, 43 is an opening, 43a 43b is a circumferential surface of the opening, 44 is a convex portion (support member), 45 is a permanent magnet, 45a and 45b are circumferential surfaces of the permanent magnet, 51 is a rotor, 52 is a rotating iron core, 53 is Openings, 53a and 53b are circumferential surfaces of the openings, 54 are permanent magnets, 54a and 54b are Circumferential surface of the permanent magnet, 55 denotes a convex portion (support member).

Claims (9)

A rotating iron core that is provided rotatably about a rotating shaft and has an opening that is open in a direction substantially parallel to the axial direction of the rotating shaft, and at least a circumferential surface and a circumferential surface of the opening In a rotor comprising a permanent magnet inserted into the opening so as to leave a gap between
The filling member is filled over substantially the whole area of the gap, so that the substantially whole area of the circumferential surface of the permanent magnet is fixed to the circumferential surface of the opening via the filling member. Rotor featured. The filling member is an adhesive;
The adhesive is applied over substantially the entire area of the gap so that the substantially entire area of the circumferential surface of the permanent magnet is fixed to the circumferential surface of the opening via the adhesive. The rotor according to claim 1. The filling member is a sheet-like member,
By inserting the sheet-like member over substantially the entire area of the gap, the substantially entire area of the circumferential surface of the permanent magnet is fixed to the circumferential surface of the opening via the sheet-like member. The rotor according to claim 1, wherein:   The portion of the sheet-like member that is in contact with at least one of the circumferential surface of the permanent magnet and the circumferential surface of the opening is configured to have an uneven shape. Rotor. A rotating iron core that is provided rotatably about a rotating shaft and has an opening that is open in a direction substantially parallel to the axial direction of the rotating shaft, and at least a circumferential surface and a circumferential surface of the opening In a rotor comprising a permanent magnet inserted into the opening so as to leave a gap between
A plurality of support members extending in the axial direction having a length corresponding to the axial length of the permanent magnet are formed on at least one of the opening side and the permanent magnet side, and the circumferential direction of the permanent magnet And / or the circumferential surface of the opening is supported by the plurality of support members over the entire length in the axial direction so that the circumferential surface of the permanent magnet is the opening. A rotor characterized by being fixed to a circumferential surface of the rotor. The support member is a convex portion formed on the opening side,
Since the circumferential surface of the permanent magnet is supported by the convex portion over the entire length in the axial direction, the circumferential surface of the permanent magnet is fixed to the circumferential surface of the opening. The rotor according to claim 5, wherein the rotor is provided. The support member is a convex portion formed on the permanent magnet side,
The circumferential surface of the permanent magnet is fixed to the circumferential surface of the opening because the circumferential surface of the opening is supported by the convex portion over the entire length in the axial direction. The rotor according to claim 5, wherein the rotor is provided. A rotor in which a permanent magnet is inserted into an opening portion opened in a direction substantially parallel to the axial direction of the rotation axis of the rotating iron core so that there is a gap between at least the circumferential surface and the circumferential surface of the opening portion. In the method of manufacturing
In the process of applying an adhesive to one end of the opening and inserting the permanent magnet into the opening from one end to the other end, the adhesive extends from one end to the other end of the opening. A method for manufacturing a rotor, comprising: coating a circumferential surface and fixing substantially the entire circumferential surface of the permanent magnet to the circumferential surface of the opening through the adhesive. A rotor in which a permanent magnet is inserted into an opening portion opened in a direction substantially parallel to the axial direction of the rotation axis of the rotating iron core so that there is a gap between at least the circumferential surface and the circumferential surface of the opening portion. In the method of manufacturing
The central part of the sheet-like member is arranged to face one end side of the opening, and the sheet-like member is inserted into the opening in the process of inserting the permanent magnet into the opening from one end side to the other end side. Is pressed against the circumferential surface from one end side to the other end side, and substantially the entire circumferential surface of the permanent magnet is fixed to the circumferential surface of the opening via the sheet-like member. A method for manufacturing a rotor.

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