CN112805903A - Rotating electrical machine - Google Patents
Rotating electrical machine Download PDFInfo
- Publication number
- CN112805903A CN112805903A CN201880097511.6A CN201880097511A CN112805903A CN 112805903 A CN112805903 A CN 112805903A CN 201880097511 A CN201880097511 A CN 201880097511A CN 112805903 A CN112805903 A CN 112805903A
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- CN
- China
- Prior art keywords
- core
- housing
- divided
- armature
- convex portion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
Abstract
Provided is a rotating electrical machine which can prevent loosening or falling of a fastener for fixing an armature core to a housing. A rotating electrical machine (1) is provided with: a housing (10) that rotatably supports a rotor (20); and an armature (30) having an annular armature core (40) fixed to the housing (10) in a state of being disposed around the rotor (20), wherein the armature core (40) is a connection body of a plurality of constituent units, a plurality of convex portions (12) are formed on the upper surface of the housing (10), and the armature core (40) is fixed to the housing (10) by attaching a fastener (46) to a constituent unit in surface contact with a convex portion (12) in a state where the upper surface of each convex portion (12) is in surface contact with the lower surface of only one constituent unit of the lower surfaces of the plurality of constituent units.
Description
Technical Field
The present invention relates to a rotating electric machine.
Background
The rotating electric machine includes, for example, a rotor and an armature core disposed around the rotor. The armature core is formed by connecting a plurality of divided cores in an annular shape, for example. Patent document 1 describes an example of a rotating electric machine.
Documents of the prior art
Patent document
Patent document 1: japanese patent No. 5889157
Disclosure of Invention
Problems to be solved by the invention
In the case where the armature core is a coupled body of the split cores, there is a possibility that a slight shift may occur in the relative positions of the split cores in the axial direction of the rotor. Therefore, when the armature core is fixed to the housing by a fastener such as a bolt, there is a possibility that the split core is not in contact with the housing although the fastener is attached. The split core not in contact with the housing vibrates in a state of being separated from the housing due to vibration generated by the operation of the rotating electric machine. In this case, loosening or falling off of the fastener may occur.
The present invention has been made to solve the above problems. The purpose is to provide a rotating electrical machine capable of preventing a fastening member for fixing an armature core to a housing from loosening or falling off.
Means for solving the problems
A rotating electric machine according to the present invention includes: a housing that rotatably supports the rotor; and an armature having an annular armature core fixed to the housing in a state of being disposed around the rotor, the armature core being a connected body of the plurality of constituent units, the armature core having a plurality of projections formed on an upper surface of the housing, the armature core being fixed to the housing by attaching a fastener to a constituent unit in surface contact with the projection in a state where an upper surface of each projection is in surface contact with a lower surface of only one constituent unit of lower surfaces of the plurality of constituent units.
Effects of the invention
According to the present invention, a plurality of projections are formed on the upper surface of the housing. The armature core is fixed to the housing by attaching a fastener to the constituent unit in surface contact with the convex portion in a state where the upper surface of each convex portion is in surface contact with the lower surface of only one of the lower surfaces of the plurality of constituent units. Therefore, the fastener for fixing the armature core to the housing can be prevented from loosening or falling off.
Drawings
Fig. 1 is a perspective view of a rotating electric machine according to embodiment 1.
Fig. 2 is a perspective view of a housing of the rotating electric machine in embodiment 1.
Fig. 3 is a side view of an armature core of a rotating electric machine according to embodiment 1.
Fig. 4 is a perspective view of a rotating electric machine according to embodiment 2.
Fig. 5 is a perspective view of a split core unit of a rotating electrical machine according to embodiment 2.
Fig. 6 is a perspective view of an armature core of a rotating electric machine according to embodiment 2.
Fig. 7 is a perspective view of a housing of a rotating electric machine in embodiment 2.
Detailed Description
Hereinafter, embodiments will be described with reference to the drawings. In the drawings, the same or corresponding portions are denoted by the same reference numerals. Duplicate descriptions are appropriately simplified or omitted.
Embodiment 1.
Fig. 1 is a perspective view of a rotating electric machine according to embodiment 1.
The rotating electric machine 1 includes a housing 10, a rotor 20, and an armature 30. The housing 10 supports the rotor 20 to be rotatable. The armature 30 is held in the housing 10 so as to surround the rotor 20 with a fixed gap from the rotor 20. The armature 30 is located at an upper side with respect to the housing 10.
The rotor 20 includes a rotating shaft 21, a rotor core 22, and a plurality of magnets 23.
The armature 30 includes an armature core 40 and a plurality of armature coils 50.
The armature core 40 is formed in an annular shape. The armature core 40 is a coupled body formed by coupling a plurality of constituent units in the circumferential direction, for example.
The constituent unit of the armature core 40 in embodiment 1 is the split core 41. The armature core 40 is formed in an annular shape by coupling a plurality of divided cores 41. The divided cores 41 are connected to the other divided cores 41 by welding or the like, for example. Fig. 1 shows an example of an armature core 40 including 36 divided cores 41.
Each of the divided cores 41 has, for example, a back yoke 42 and a magnetic pole tooth 43. The magnetic pole teeth 43 are formed to protrude from the back yoke 42.
The back yoke 42 of the divided core 41 is coupled to the back yokes 42 of the other divided cores 41. In the annular armature core 40, the back yoke 42 has a cylindrical shape. The magnetic pole teeth 43 project radially inward from the inner peripheral wall surface of the cylindrical portion formed by the back yoke 42. The magnetic pole teeth 43 are arranged at equal intervals in the circumferential direction on the inner peripheral wall surface. For example, the armature core 40 including 36 divided cores 41 has 36 magnetic pole teeth 43.
The armature coil 50 is a coil formed by winding a conductive wire around the magnetic pole teeth 43 with an insulator not shown interposed therebetween. In the armature core 40, a space called a slot 44 is formed between adjacent magnetic pole teeth 43. That is, the armature coil 50 of the armature 30 is housed in the slot 44 of the armature core 40.
A hole 45 is formed in each of the divided cores 41. The hole 45 is formed in the center of the back yoke 42, for example. The hole 45 penetrates from the upper surface to the lower surface of the divided core 41. The armature core 40 is fixed to the housing 10 by, for example, passing fasteners 46 through holes 45 of the plurality of divided cores 41. The fastener 46 is, for example, a bolt or a pin.
Fig. 2 is a perspective view of a housing of the rotating electric machine in embodiment 1.
The housing 10 has a base portion 11 and a plurality of projections 12. The bed portion 11 is formed in a disk shape, for example. The base portion 11 is formed with a hole 13 through which the rotary shaft 21 passes. A plurality of projections 12 are formed on the upper surface of the base portion 11.
The plurality of projections 12 are arranged in a circle at a fixed interval, for example. The upper surface of each convex portion 12 is smaller than the lower surface of one of the divided cores 41. The number of the convex portions 12 is smaller than the number of the division cores 41. The interval between the convex portions 12 is larger than the width of one divided core 41, for example.
Bolt holes 14 are formed in at least a part of the plurality of projections 12. Fig. 2 illustrates a case where one bolt hole 14 is provided in each of 9 convex portions 12 out of 18 convex portions 12. Fig. 2 illustrates a case where bolt holes 14 are provided every other one of the plurality of protrusions 12 arranged in a circular shape. Further, the bolt holes 14 may be provided in all the convex portions 12.
Fig. 3 is a side view of an armature core of a rotating electric machine according to embodiment 1.
The armature core 40 has a cylindrical lower surface 47. The cylindrical lower surface 47 is formed by connecting the lower surfaces of the adjacent components. The cylindrical lower surface 47 is a lower surface of a cylindrical portion formed by the back yoke 42 of the division core 41 connected in an annular shape. In the assembled rotating electrical machine 1, the cylindrical lower surface 47 of the armature core 40 is in contact with or opposed to the housing 10.
In fig. 3, the offsets of the split cores 41 from each other in the direction corresponding to the axial direction of the rotor 20 of the rotating electrical machine 1 are shown. In fig. 3, a part of the division cores 41 is distinguished by attaching a letter to a reference numeral. For example, the divided cores 41c are not offset with respect to the divided cores 41 a. For example, the divided cores 41b are offset so as to protrude toward the cylindrical lower surface 47 side compared to the divided cores 41a and 41 c. For example, the divided core 41d is offset so as to protrude on the side opposite to the cylindrical lower surface 47 from the divided cores 41a and 41 c.
In fig. 3, the offset amount of the divided cores 41 from each other is emphatically shown. Actually, the divided cores 41 can be coupled to each other with a further slight offset. However, it is difficult to set the offset amount to 0. The offset between the divided cores 41 is caused by the variation in the assembly work of the armature core 40. This also makes it difficult to predict which of the divided cores 41 is shifted in the axial direction.
The armature 30 is fixed to the housing 10 by the fasteners 46 via the holes 45 of the division core 41 and the bolt holes 14 of the convex portions 12 in a state where the cylindrical lower surface 47 of the armature core 40 is in surface contact with the upper surfaces of the plurality of convex portions 12.
One convex portion 12 is in contact with only one of the divided cores 41. Each of the convex portions 12 is in contact with a different divided core 41. The plurality of convex portions 12 are disposed on the upper surface of the case 10 such that the other divided cores 41 adjacent to the divided core 41 with which the convex portions 12 are in contact do not contact the convex portions 12. Fig. 1 illustrates a case where the split cores 41 connected in an annular shape are in contact with the convex portions 12 every other.
The fastener 46 is not attached to the divided cores 41 which are not in contact with the convex portion 12. The fastener 46 is attached to at least a part of the plurality of divided cores 41 that are in contact with the convex portion 12, for example. Fig. 1 illustrates a case where the fastener 46 is attached only to the divided core 41 that is in contact with the convex portion 12 provided with the bolt hole 14 shown in fig. 2. In the case where the bolt holes 14 are provided in all the convex portions 12, the fasteners 46 may be attached to all the divided cores 41 that are in contact with the convex portions 12.
For example, in the case where the divided core 41a and the divided core 41c shown in fig. 3 are in contact with different convex portions 12, respectively, the divided core 41b and the divided core 41d are not in contact with the case 10. In this case, the assembled rotating electrical machine 1 is not affected by the offset of the split cores 41b and 41d with respect to the split cores 41a and 41 c.
According to embodiment 1 described above, the annular armature core 40 is fixed to the housing 10 in a state of being disposed around the rotor 20. The armature core 40 is a coupled body formed by coupling a plurality of constituent units in the circumferential direction. A plurality of projections 12 are formed on the upper surface of the housing 10. The armature core 40 is fixed to the housing 10 by attaching the fastener 46 to at least some of the plurality of constituent units that are in surface contact with the convex portion 12 in a state where the upper surface of each convex portion 12 is in surface contact with the lower surface of only one of the plurality of constituent units. That is, even if the cylindrical lower surface 47 of the armature core 40 is not a uniform plane, the component to which the fastener 46 is attached can reliably contact the convex portion 12. Therefore, even if the component to which the fastener 46 is attached receives operational vibration of the rotating electrical machine 1 or the like, the component does not vibrate in a state of being separated from the housing 10. As a result, the fastener 46 for fixing the armature core 40 to the housing 10 can be prevented from loosening or falling off.
The armature core 40 is, for example, a single divided core 41 having a back yoke 42 and a magnetic pole tooth 43 projecting from the back yoke 42. The upper surface of the convex portion 12 is formed smaller than the lower surface of the divided core 41, for example. The armature core 40 is formed into an annular shape by coupling back yokes 42 of the plurality of divided cores 41 to each other, for example, and is fixed to the housing 10 by attaching fasteners 46 to at least some of the plurality of divided cores 41 in surface contact with the convex portions 12. Therefore, even if the lower surfaces of the coupled divided cores 41 are offset from each other, the divided cores 41 to which the fasteners 46 are attached can reliably contact the convex portions 12. As a result, the fastener 46 for fixing the armature core 40 to the housing 10 can be prevented from loosening or falling off.
Embodiment 2.
Embodiment 2 will be described below. The description overlapping with embodiment 1 is appropriately omitted.
Fig. 4 is a perspective view of a rotating electric machine according to embodiment 2. Fig. 5 is a perspective view of a split core unit of a rotating electrical machine according to embodiment 2. Fig. 6 is a perspective view of an armature core of a rotating electric machine according to embodiment 2.
The rotating electrical machine 1 according to embodiment 2 is the same as the rotating electrical machine 1 according to embodiment 1, except that the structure of the armature core 40 and the convex portion 12 of the housing 10 are different.
In embodiment 2, the constituent unit of the armature core 40 is a split core unit 60. The armature core 40 is formed in an annular shape by coupling a plurality of the divided core units 60. The divided core unit 60 is connected to another divided core unit 60 by welding or the like, for example. Fig. 4 and 6 illustrate an armature core 40 formed of six split core units 60.
The divided core unit 60 is an arc-shaped member formed by connecting a plurality of smaller divided cores 61. The shape and size of the divided core 61 are the same as those of the divided core 41, for example. Fig. 5 illustrates a split core unit 60 composed of six split cores 61.
Each of the divided cores 61 is, for example, a laminated body formed by stacking plate-shaped core pieces. The core sheet is made of, for example, a thin sheet by press working or the like. The laminated core pieces are fastened by, for example, rivets 62. The adjacent divided cores 61 are connected by a rivet 63, for example.
In fig. 5, six divided cores 61 are distinguished by attaching a letter to a reference numeral. All the core pieces forming the split cores 61a to 61f are punched out from the same thin plate at the same time by press working. The divided cores 61a to 61f are laminated bodies of the same number of core pieces obtained from the same thin plate. Therefore, the lower surfaces of the split cores 61a to 61f do not deviate from each other in the direction corresponding to the axial direction of the rotor 20 of the rotating electrical machine 1. That is, the arcuate lower surface 64 of each of the divided core units 60 is a uniform plane.
The split core 61a forming one end of the split core unit 60 is connected to the split core 61f forming the other end of the other split core unit 60. Therefore, in the cylindrical lower surface 47 of the armature core 40 in embodiment 2, a step may be generated only at the boundary of the adjacent divided core units 60.
Fig. 7 is a perspective view of a housing of a rotating electric machine in embodiment 2.
In embodiment 2, the upper surface of the convex portion 12 is smaller than the arc-shaped lower surface 64 of one divided core unit 60. The upper surface of the convex portion 12 may be larger than the lower surface of one of the divided cores 61, for example. Fig. 7 illustrates a case where all of the nine projections 12 are provided with one bolt hole 14.
In embodiment 2, one convex portion 12 may be in contact with a plurality of split cores 61 included in the same split core unit 60. However, one convex portion 12 is in contact with only one of the split core units 60. A plurality of convex portions 12 are arranged on the upper surface of the case 10 so as not to overlap the boundary of the adjacent divided core units 60. That is, the plurality of convex portions 12 are arranged on the upper surface of the housing 10 so that there are no convex portions 12 that simultaneously contact both the split core 61a included in one of the adjacent split core units 60 and the split core 61f included in the other. Further, a plurality of convex portions 12 may simultaneously contact one divided core unit 60.
The fastener 46 is attached to, for example, one split core 61 included in the split core unit 60 that is in contact with the convex portion 12. In the case where a plurality of bolt holes 14 are provided in one convex portion 12, the fasteners 46 may be attached to a plurality of split cores 61 included in the split core unit 60 that is in contact with the convex portion 12.
According to embodiment 2 described above, the armature core 40 is fixed to the housing 10 by attaching the fastening member 46 to at least some of the plurality of constituent units that are in surface contact with the convex portion 12 in a state where the upper surface of each convex portion 12 is in surface contact with the lower surface of only one of the plurality of constituent units. Therefore, as in embodiment 1, the fastening member 46 for fixing the armature core 40 to the housing 10 can be prevented from loosening or falling off.
The armature core 40 is formed of, for example, an arc-shaped divided core unit 60 in which a plurality of divided cores 61 are connected. The upper surface of the convex portion 12 is formed smaller than the lower surface 64 of the divided core unit 60, for example. The armature core 40 is formed in an annular shape by coupling back yokes 42 at the end portions of a plurality of the split core units 60 to each other, for example, and is fixed to the housing 10 by attaching a fastener 46 to at least one split core 61 included in the split core unit 60 in surface contact with the convex portion 12 in a state where the boundary between two adjacent split core units 60 does not overlap with the convex portion 12. Therefore, even if the lower surfaces 64 of the coupled divided core units 60 are offset from each other, the divided cores 61 to which the fasteners 46 are attached can reliably contact the convex portions 12. As a result, the fastener 46 for fixing the armature core 40 to the housing 10 can be prevented from loosening or falling off. Further, since the constituent unit of the armature core 40 is the split core unit 60, the efficiency of the assembly work of the rotating electric machine 1 can be improved.
All the split cores 41 included in one split core unit 60 are, for example, a laminated body of core pieces obtained from the same thin plate. Therefore, the lower surface 64 of the split core unit 60 can be uniformly flat.
Industrial applicability
As described above, the present invention can be applied to a rotating electrical machine in which loosening or dropping of a fastener that fixes an armature core to a housing can be prevented.
Description of the reference symbols
1: a rotating electric machine;
10: a housing;
11: a base part;
12: a convex portion;
13: an aperture;
14: bolt holes;
20: a rotor;
21: a rotating shaft;
22: a rotor core;
23: a magnet;
30: an armature;
40: an armature core;
41: dividing the iron core;
41 a: dividing the iron core;
41 b: dividing the iron core;
41 c: dividing the iron core;
41 d: dividing the iron core;
42: a back yoke;
43: magnetic pole teeth;
44: a groove;
45: an aperture;
46: a fastener;
47: a cylindrical lower surface;
50: an armature coil;
60: dividing the iron core unit;
61: dividing the iron core;
61 a: dividing the iron core;
61 b: dividing the iron core;
61 c: dividing the iron core;
61 d: dividing the iron core;
61 e: dividing the iron core;
61 f: dividing the iron core;
62: riveting a connecting piece;
63: riveting a connecting piece;
64: a lower surface.
Claims (4)
1. A rotating electrical machine is provided with:
a housing that rotatably supports the rotor; and
an armature having an annular armature core fixed to the housing in a state of being disposed around the rotor,
the armature core is a connected body of a plurality of constituent units,
a plurality of protrusions are formed on the upper surface of the housing,
the armature core is fixed to the housing by attaching a fastener to the constituent unit in surface contact with the convex portion in a state where an upper surface of each of the convex portions is in surface contact with a lower surface of only one of the lower surfaces of the plurality of constituent units.
2. The rotating electric machine according to claim 1,
the constituent unit of the armature core is a split core,
the upper surface of the convex portion is formed smaller than the lower surface of the division core,
the armature core is formed in an annular shape by coupling the plurality of divided cores, and is fixed to the housing by attaching a fastener to the divided cores that are in surface contact with the convex portion.
3. The rotating electric machine according to claim 1,
the armature core is composed of a plurality of divided core units connected to each other,
the upper surface of the convex portion is formed smaller than the lower surface of the divided core unit,
the armature core is formed in an annular shape by coupling the plurality of divided core units, and is fixed to the housing by attaching a fastener to the divided core unit in surface contact with the convex portion in a state where a boundary between two adjacent divided core units does not overlap with the convex portion.
4. The rotating electric machine according to claim 3,
all the divided cores included in one divided core unit are a laminated body of core pieces obtained from the same thin plate.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2018/038516 WO2020079757A1 (en) | 2018-10-16 | 2018-10-16 | Rotating electric machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112805903A true CN112805903A (en) | 2021-05-14 |
Family
ID=69568193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201880097511.6A Pending CN112805903A (en) | 2018-10-16 | 2018-10-16 | Rotating electrical machine |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6648865B1 (en) |
| CN (1) | CN112805903A (en) |
| WO (1) | WO2020079757A1 (en) |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58159644A (en) * | 1982-12-29 | 1983-09-22 | Hitachi Ltd | Manufacture of sealed motor driven compressor |
| JPH0270244A (en) * | 1988-09-02 | 1990-03-09 | Sanyo Electric Co Ltd | Stator core |
| JPH09149567A (en) * | 1995-11-17 | 1997-06-06 | Yaskawa Electric Corp | Frameless motor |
| JP2007189785A (en) * | 2006-01-11 | 2007-07-26 | Sumitomo Electric Ind Ltd | Stator in dynamo-electric machine, manufacturing method of stator, and housing used for stator |
| JP4372130B2 (en) * | 2006-09-08 | 2009-11-25 | 三洋電機株式会社 | motor |
| KR101273594B1 (en) * | 2007-04-05 | 2013-06-14 | 삼성전자주식회사 | Motor and drum type washing machine having the same |
| JP5237776B2 (en) * | 2008-12-11 | 2013-07-17 | 三菱電機株式会社 | Rotating electric machine |
| US8994244B2 (en) * | 2012-08-01 | 2015-03-31 | Nidec Motor Corporation | Motor stator with reduced coil configuration |
| CN104704712B (en) * | 2012-10-10 | 2017-08-11 | 三菱电机株式会社 | Electric rotating machine and its manufacture method |
| JP6127794B2 (en) * | 2013-07-18 | 2017-05-17 | 株式会社デンソー | Rotating electric machine stator |
-
2018
- 2018-10-16 WO PCT/JP2018/038516 patent/WO2020079757A1/en active Application Filing
- 2018-10-16 CN CN201880097511.6A patent/CN112805903A/en active Pending
- 2018-10-16 JP JP2019541368A patent/JP6648865B1/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020079757A1 (en) | 2020-04-23 |
| JP6648865B1 (en) | 2020-02-14 |
| JPWO2020079757A1 (en) | 2021-02-15 |
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