CN110447159B - End plate, rotor of motor provided with end plate and motor - Google Patents
End plate, rotor of motor provided with end plate and motor Download PDFInfo
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- CN110447159B CN110447159B CN201880020116.8A CN201880020116A CN110447159B CN 110447159 B CN110447159 B CN 110447159B CN 201880020116 A CN201880020116 A CN 201880020116A CN 110447159 B CN110447159 B CN 110447159B
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- end plate
- yoke
- extending
- rotor
- magnet
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- 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
- H02K1/22—Rotating parts of the magnetic circuit
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- 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
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
- H02K21/16—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures having annular armature cores with salient poles
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
本发明的端板在包括在圆柱形状的转子磁轭埋入有多个永磁体的转子的磁体埋入式马达中安装于圆柱形状的两端面中的至少一端面。转子具有：转子磁轭，其形成有分别用于埋设永磁体的空孔；旋转轴，其贯穿转子磁轭的两端面；以及至少一张板状的该端板。并且，该端板包括：主体部，其与转子磁轭的端面呈圆环状紧贴；以及磁体施力部，其自主体部的圆环状的紧贴部位沿着径向延伸，与永磁体抵接。
The end plate of the present invention is attached to at least one of both end surfaces of a cylindrical shape in a magnet embedded motor including a rotor in which a plurality of permanent magnets are embedded in a cylindrical rotor yoke. The rotor has: a rotor yoke having holes for burying the permanent magnets; a rotating shaft penetrating both end surfaces of the rotor yoke; and at least one plate-shaped end plate. In addition, the end plate includes: a main body part, which is in close contact with the end face of the rotor yoke in a circular shape; The magnet abuts.
Description
Technical Field
The present invention relates to an end plate for a rotor of a motor, a rotor of a motor provided with the end plate, and a motor.
Background
A rotor of an interior permanent magnet brushless motor (IPM motor) is configured such that a permanent magnet is inserted into a hole formed in a yoke constituting a rotor core. The yoke is formed by laminating a plurality of plate-like bodies. The yoke is formed with a hole having an opening. The opening is open in an axial direction including an axial center of a shaft as a rotating shaft. The permanent magnet is inserted into the hollow hole through the opening portion. Conventionally, there is a method of fixing a permanent magnet and a yoke to each other with an adhesive or with the magnetic force of the permanent magnet (see, for example, patent document 1).
In addition, a structure is also disclosed: disc-shaped end plates are provided at axial end portions of the yoke to prevent the permanent magnets from protruding in the axial direction (see, for example, patent document 2).
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2007 and 68318
Patent document 2: japanese patent laid-open publication No. 2007-259583
Disclosure of Invention
An end plate for a rotor of a motor according to an aspect of the present invention is an end plate attached to at least one of both end surfaces of a cylindrical shape in a magnet embedded motor including a rotor in which a plurality of permanent magnets are embedded in a cylindrical rotor yoke. The rotor has: a rotor yoke formed with holes for embedding permanent magnets, respectively; a rotating shaft penetrating both end surfaces of the rotor yoke; and at least one plate-like end plate. And, the end plate includes: a main body portion that is in annular close contact with an end surface of the rotor yoke; and a magnet biasing portion extending in a radial direction from the annular close contact portion of the main body portion and abutting against the permanent magnet.
According to the above configuration, the urging force of the magnet urging portion to the permanent magnet toward the axial inner side is generated independently from the body portion which is in close contact with the end surface of the yoke in the annular shape. Therefore, a sufficient force can be applied to appropriate portions of the permanent magnet and the yoke.
As described above, the present invention has an effect of applying a sufficient urging force to appropriate portions of the permanent magnet and the yoke.
Drawings
Fig. 1 is a view of a rotor of a motor to which an end plate according to an embodiment of the present invention is attached, as viewed from an axial direction.
Fig. 2 is a view showing a state where an end plate is removed from a rotor of the motor shown in fig. 1.
FIG. 3 is a cross-sectional view of AA-AA in FIG. 1.
Fig. 4 is a BB-BB cross-sectional view in fig. 1.
Fig. 5 is a view of a rotor of a motor to which an end plate according to modification 1 of the embodiment of the present invention is attached, as viewed from an axial direction.
Fig. 6 is a view of a rotor of a motor to which an end plate according to modification 2 of the embodiment of the present invention is attached, as viewed from an axial direction.
Fig. 7 is a view of a rotor of a motor to which an end plate according to modification 3 of the embodiment of the present invention is attached, as viewed from the axial direction.
Fig. 8 is a cross-sectional view of CC-CC shown in fig. 7.
Fig. 9 is a view of a rotor of a motor to which an end plate according to modification 4 of the embodiment of the present invention is attached, as viewed from an axial direction.
Fig. 10 is a view of a rotor of a motor to which an end plate according to modification 5 of the embodiment of the present invention is attached, as viewed from an axial direction.
Fig. 11 is a view of a rotor of a motor to which an end plate according to modification 6 of the embodiment of the present invention is attached, as viewed from an axial direction.
Fig. 12 is a view of a rotor of a motor to which an end plate according to modification 7 of the embodiment of the present invention is attached, as viewed from an axial direction.
Fig. 13 is a view obtained by observing a state in which an end plate is attached to a rotor of a motor having a permanent magnet having an arc-shaped cross section from the axial direction.
Fig. 14 is a view obtained by observing a state in which an end plate is attached to a rotor of a motor having a permanent magnet having an arc-shaped cross section from the axial direction.
Fig. 15A is a side view of a rotor of a motor to which an end plate according to an embodiment of the present invention is attached.
Fig. 15B is a side view of a rotor of a motor to which an end plate according to an embodiment of the present invention is attached.
Fig. 15C is a side view of a rotor of a motor to which an end plate according to an embodiment of the present invention is attached.
Fig. 16A is a diagram showing another modification of the present embodiment.
Fig. 16B is a diagram showing another modification of the present embodiment.
Fig. 17 is a conceptual diagram of a motor according to an embodiment of the present invention.
Detailed Description
As described later, the end plate for a rotor of a motor according to the present invention includes: a main body portion that is in annular close contact with an end surface of a yoke of the rotor; and a magnet biasing portion that extends in the radial direction from the annular close contact portion of the main body portion and abuts against the permanent magnet, thereby being capable of applying a sufficient biasing force to an appropriate portion of the rotor.
That is, the conventional method as described above has the following points that need improvement. That is, in the method of fixing the yoke and the permanent magnet with the adhesive, a step of applying the adhesive to the permanent magnet and drying the applied adhesive is required. Therefore, man-hours for manufacturing the motor increase.
In addition, various management tasks such as management of the amount of adhesive applied and management of the step of drying the adhesive occur. Also, the method of fixing the yoke and the permanent magnet with the adhesive may have a state in which the adhesive strength is not uniform.
In addition, in a structure in which a disk-shaped end plate is provided at an axial end portion of the yoke, a sufficient urging force may not be applied to an appropriate portion of the yoke and the permanent magnet. For example, when the yoke is formed by stacking a plurality of plate-like bodies, the plurality of plate-like bodies may be fixed to each other by caulking or the like. In this case, it is considered that the axial end portion is pressed by the end plate at the time of or after manufacturing the yoke so as to prevent deformation such as rolling up of a part of the plate-like body.
On the other hand, when the axial length of the permanent magnet is shorter than the depth of the void (axial length of the yoke), there are cases where: even if a disk-shaped end plate is arranged, the permanent magnet moves in the axial direction in the hollow hole. Therefore, the permanent magnet is designed to have a longer axial length than the depth of the empty hole. Therefore, even if the disk-shaped end plate is provided at the axial end portion of the yoke, the disk-shaped end plate is in a state of abutting against the permanent magnet but not abutting against the yoke. Therefore, in the configuration as in patent document 2, the permanent magnet and the yoke cannot be pressed at the same time.
Each permanent magnet is manufactured to have a predetermined tolerance. Therefore, in the case of constructing the rotor using a plurality of permanent magnets, there may be a difference in the axial lengths of the plurality of permanent magnets, although within the tolerance range of the permanent magnets. Therefore, when the disk-shaped end plate is provided at the axial end of the yoke, the end plate cannot uniformly apply a biasing force to each permanent magnet.
Therefore, in an embodiment of the present invention, an end plate is configured to include: a main body portion that is in annular close contact with an end surface of a yoke of the rotor; and a magnet biasing portion extending in a radial direction from the annular close contact portion of the main body portion and abutting against the permanent magnet. In this way, the magnet biasing portion acts as a leaf spring on the permanent magnet with the body portion in close contact with the end face as the base end, and therefore, a sufficient biasing force can be applied to appropriate portions of the permanent magnet and the yoke. In particular, if the permanent magnet protrudes from the end face, a more significant effect can be obtained.
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same elements or elements corresponding to the same elements are denoted by the same reference numerals throughout the drawings, and redundant description thereof will be omitted. In addition, when there are a plurality of the same components in each drawing, one to two of them are denoted by reference numerals, and the other reference numerals are omitted.
(embodiment mode)
Fig. 1 is a view of a rotor of a motor to which an end plate according to an embodiment of the present invention is attached, as viewed from an axial direction, and the end plate is shown by a solid line. Fig. 2 is a view showing an end plate and a yoke in a state where the end plate is removed from the rotor of the motor shown in fig. 1. Fig. 3 is a cross-sectional view AA-AA of the end plate of fig. 1, and fig. 4 is a cross-sectional view BB-BB of the end plate of fig. 1. In fig. 3 and 4, the lower side is the axially inner side.
The rotor 1 of the motor of the present embodiment includes a cylindrical yoke 2 as a rotor yoke. The yoke 2 is held so as to be rotatable relative to a cylindrical stator (not shown) attached to an inner wall surface of an outer frame of the motor. The yoke 2 is formed of a plate-like body that is a metal plate subjected to a process such as press working, and is formed by stacking the plurality of plate-like bodies. A shaft hole 3 is provided in the center of the yoke 2. A shaft (S shown in fig. 15A to 15C described later) as a rotation shaft including the shaft center P is inserted through the shaft hole 3, and the yoke 2 is fixed to the shaft S. In the following description, a direction including the axial center P of the shaft S in which the shaft S extends is also referred to as an axial direction, a direction in which the yoke 2 is not provided is also referred to as an axial outer side, and a direction opposite to the axial outer side is also referred to as an axial inner side. The radial direction intersecting the axis S and centered on the axis P is also referred to as the radial direction, and the direction away from the axis P in the radial direction is also referred to as the radial outer side, and the direction closer to the axis P is also referred to as the radial inner side. The direction around the axial center with the axial center P of the shaft S as the rotation center is also referred to as the circumferential direction.
As shown in fig. 2, for example, a plurality of holes 4 are formed in the yoke 2 so as to be arranged at equal intervals in the circumferential direction and to penetrate the yoke 2 in the axial direction. A portion of the yoke 2 radially outside the hole 4 will be referred to as a yoke outer end portion 15. The plurality of yoke outer ends 15 are also formed so as to be arranged at equal intervals in the circumferential direction. The hollow 4 is open at both ends in the axial direction of the yoke 2. The rotor 1 includes a plurality of permanent magnets 5 inserted into the plurality of holes 4, respectively. In the present embodiment, the permanent magnet 5 is formed in a flat plate shape, and the flat plate-shaped permanent magnet 5 (hereinafter, the magnet 5 is appropriately omitted) is arranged such that an imaginary line L (fig. 2) extending in the radial direction from the axis P is orthogonal to the surface of the flat plate. As described above, the motor of the present embodiment is a magnet-embedded motor in which a plurality of permanent magnets 5 are embedded in the yoke 2 of the rotor 1. In addition, the corners of the magnet 5 may be chamfered or rounded. This can prevent the magnet 5 from being cracked or broken during manufacturing. The magnet 5 is formed of a rare earth magnet made of a rare earth element such as neodymium. In the present embodiment, an example of the rotor 1 is described, and the rotor 1 has 8 holes 4, and 8 magnets 5 are provided in each hole 4 in total by providing one magnet 5.
A plate-like end plate 6 is provided at least one end portion in the axial direction of the rotor 1. That is, the cylindrical yoke 2 is configured by laminating plate-shaped bodies along the lamination direction as described above, and the end plate 6 is attached to at least one of both end surfaces of the plate-shaped bodies laminated in a cylindrical shape. The end plate 6 is formed of an elastically deformable metal plate. The end plate 6 is formed by pressing or other processing of a metal plate so as to include the following configuration. As shown in fig. 2, the end plate 6 includes an annular main body 7 having a central axial hole 3, and a magnet biasing portion 8 and a yoke biasing portion 9 radially extending outward in the radial direction from the main body 7. The body portion 7 is in annular contact with a yoke end surface 2s which is an end surface of the yoke 2 as shown in fig. 2. The body portion 7 includes a plurality of mounting holes 10 for fixing the body portion 7 and the yoke 2 together with fixing members such as rivets.
The magnet biasing portion 8 includes a plurality of 1 st extending pieces 11 extending radially outward from the main body portion 7, and the 1 st extending pieces 11 are radially arranged at equal intervals in the circumferential direction. Further, a distal end portion 13 is formed at a distal end portion on the radially outer side of each 1 st extending piece 11. On the other hand, permanent magnets 5 are embedded in the respective holes 4 of the yoke 2, and the magnets 5 are each configured to slightly protrude from an end face of the yoke 2. The tip end 13 of the 1 st extension piece 11 abuts against the permanent magnet 5 as an abutting portion. Thus, the magnet biasing portion 8 acts as a plate spring on the magnet 5 with the body portion 7 in close contact with the end surface of the yoke 2 as a base end, and biases the magnet 5 inward in the axial direction. That is, the magnet 5 protruding from the end face of the yoke 2 is biased by the magnet biasing portion 8 in the plate thickness direction of the end plate 6 toward the yoke 2 so that the magnet 5 is pushed into the hole 4. The plurality of 1 st extending pieces 11 are provided with the number (8) corresponding to the number of the magnets 5. The plurality of 1 st extending pieces 11 are disposed in alignment with the positions of the plurality of magnets 5. More specifically, each 1 st extending piece 11 is configured such that the tip end portion 13 abuts against the central portion of the axial end face of the corresponding magnet 5.
For example, the width (length in the circumferential direction) of the contact portion of the 1 st extending piece 11 with the magnet 5 is 1/3 or more and 2/3 or less of the width (length in the circumferential direction) of the magnet 5. Thus, the end plate 6 can sufficiently apply the biasing force of the 1 st extending piece 11 to each corresponding magnet 5, and can secure a sufficient space for providing the 2 nd extending piece 12.
As shown in fig. 3, in a state where the 1 st extending piece 11 is not in contact with the magnet 5 (natural state), the portion of the 1 st extending piece 11 other than the tip portion 13 is formed on the same plane as the main body portion 7. The tip 13 of the 1 st extension piece 11 has a shape bent in the axial direction toward the magnet 5 side (axially inward). On the other hand, the length of the magnet 5 is set so that the magnet 5 protrudes from the yoke 2 in the axial direction. Therefore, in a state where end plate 6 is attached to yoke 2, that is, in a completed state of rotor 1, magnet 5 acts so as to push out tip end portion 13 in contact therewith to the outside in the axial direction. Due to this action, the 1 st extending piece 11 is deformed so as to be bent outward in the axial direction with respect to the above-described plane formed by the main body portion 7. Then, the 1 st extending piece 11 deformed in this manner functions as a so-called leaf spring, and a restoring force to return to the original plane acts so as to press the magnet 5 in contact therewith, and becomes an urging force applied to the magnet 5. Further, in this way, in the completed state of the rotor 1, the body portion 7 is in surface-to-surface contact with the end surface of the yoke 2, and the tip end of the tip end portion 13 in the axial direction is in contact with the magnet 5. The 1 st extending piece 11 is bent outward in the axial direction such that the axial distance between the end surface of the yoke 2 and the 1 st extending piece 11 increases outward in the radial direction.
Further, the tip end portion 13 of the 1 st extending piece 11 is formed in an arc shape in a plan view. That is, the portion of the distal end portion 13 bent in the axial direction (the protruding portion of the distal end portion 13 protruding inward in the axial direction) has a curved surface curved in the circumferential direction as shown in fig. 1. This can increase the rigidity of the tip end portion 13 of the end plate 6, and can also increase the pressing strength of the contact portion of the 1 st extending piece 11 with the magnet 5. The arc of the tip portion 13 is, for example, an arc centered on the axial center P.
The length of the portion of the tip 13 of the 1 st extension piece 11 bent inward in the axial direction is set to a length that can absorb variations in the amount of protrusion of the magnet 5 from the yoke 2 in the axial direction. This deviation is due to the tolerance of the magnet 5. For example, the length is 0.5mm or more.
Next, the yoke biasing portion 9 includes a plurality of 2 nd extending pieces 12 radially extending outward in the radial direction from the body portion 7 at positions shifted from the positions of the plurality of 1 st extending pieces 11 in the circumferential direction. A tip 14 is formed at a radially outer tip of each 2 nd extending piece 12. The tip end portion 14 abuts against a yoke outer end portion 15 of the yoke 2 at a portion radially outside the hollow hole 4. That is, the plurality of 2 nd extending pieces 12 are formed not to overlap the plurality of 1 st extending pieces 11. The length from the shaft center P to the tip end 14 of the 2 nd extending piece 12 is longer than the length from the shaft center P to the tip end 13 of the 1 st extending piece 11, and the length from the shaft center P to the tip end 14 of the 2 nd extending piece 12 is substantially equal to the rotation radius of the yoke 2.
Since the distal end portions 14 of the 2 nd extending pieces 12 abut on the portion of the yoke 2 radially outward of the hollow hole 4, the yoke biasing portions 9 bias the yoke outer end portions 15, which are the portions, inward in the axial direction. The plurality of 2 nd extending pieces 12 are provided one on each of both sides in the circumferential direction of the one 1 st extending piece 11. That is, as shown in fig. 1, a pair, that is, two 2 nd extending pieces 12 are disposed between a pair of 1 st extending pieces 11 which are closest to each other. Thus, in the present embodiment, the yoke biasing portion 9 includes 16 2 nd extending pieces 12. A slit 18 is further formed between the pair of 2 nd extending pieces 12, and a 2 nd extending pair 12p is formed by the pair of 2 nd extending pieces 12 including one slit 18.
The plurality of 1 st extension pieces 11 and the plurality of 2 nd extension pieces 12 are provided independently of each other. That is, a slit 16 is provided between each 1 st extending piece 11 and the adjacent 2 nd extending piece 12, and the slit 16 is a gap extending in the radial direction between the two. Thus, the tip end portion 13 of each 1 st extension piece 11 of the magnet biasing portion 8, which abuts against the permanent magnet 5, is circumferentially separated from the yoke biasing portion 9 by the slit 16, which is a radial cutout. The shape of the slit 16 is not particularly limited.
According to the above configuration, the biasing force applied to each magnet 5 in the axial direction by the magnet biasing portion 8 is generated independently of the body portion 7 abutting against the yoke 2. Therefore, a sufficient urging force can be applied to appropriate portions of the magnets 5 and the yoke 2. The yoke biasing portion 9 is provided independently of the magnet biasing portion 8. According to this configuration, the urging force applied to the respective magnets 5 in the axial direction by the magnet urging portion 8 and the urging force applied to the yoke outer end portion 15 in the axial direction by the yoke urging portion 9 can be generated independently of each other.
In the above configuration, the single 1 st extending piece 11 abuts on each of the plurality of magnets 5, and generates biasing force that biases each magnet 5 inward in the axial direction independently. Thus, even in the case where the axial lengths of the plurality of magnets 5 deviate, the end plate 6 can apply an appropriate force to each magnet 5.
The single 2 nd extending piece 12 abuts against each yoke outer end of the yoke outer ends 15 provided corresponding to the holes 4. Therefore, the yoke outer ends 15 are independently biased inward in the axial direction. Therefore, even when some yoke outer ends 15 are warped (rolled up), etc., the end plate 6 can apply a biasing force to each yoke outer end 15 that is suitable for each yoke outer end 15.
In the present embodiment, the yoke biasing portion 9 has a shape such that: when viewed from the axial direction, the permanent magnet 5 is disposed at a position overlapping the permanent magnet 5, and is in a state of being in contact with the yoke outer end 15 of the yoke 2, but is not in contact with the magnet 5. More specifically, as shown in fig. 4, each of the 2 nd extending pieces 12 includes a bent portion 17, and is bent from the main body portion 7 with the bent portion 17 as a bent position. More specifically, in a state where the end plate 6 does not abut against the yoke 2 (natural state), the bent portion 17 is formed at the base end of the 2 nd extending piece 12 in the radial direction or between the base end and the tip end. Here, the base end of the 2 nd extending piece 12 refers to a portion of the 2 nd extending piece 12 closest to the axial center P in the radial direction, and the tip end refers to a portion farthest from the axial center P. Fig. 4 shows a configuration example in which the folded portion 17 is formed at a portion of the base end of the 2 nd extending piece 12. In this manner, the yoke biasing portion 9 is formed in such a shape that a portion of each 2 nd extending piece 12 on the radially outer side of the bent portion 17 is bent outward in the axial direction with respect to the body portion 7 so as to be apart from the yoke 2. In the case of fig. 4, since the bent portion 17 is the base end of the 2 nd extending piece 12, the entire 2 nd extending piece 12 is bent outward in the axial direction with respect to the main body portion 7. The bent portion 17 is located radially inward of the position of the magnet 5.
The distal end portion 14 of the 2 nd extending piece 12 is bent toward the yoke 2 (axially inward), and the distal end portion 14 is configured to abut against a yoke outer end portion 15 of the yoke 2 radially outward of the aperture 4. In this case, the position of the tip end portion 14 in the axial direction naturally reaches the planar position of the body portion 7. Alternatively, in a natural state, the tip of the tip portion 14 is located closer to the yoke 2 than the planar position of the body portion 7. More preferably, the distal end portion 14 is configured such that the position of the distal end in the axial direction is, in a natural state, a position protruding toward the yoke 2 side by 3mm or more from the plane position of the body portion 7.
Alternatively, the shape may be such that: the entire portion of the 2 nd extending piece 12 on the tip end side of the bent portion 17 is curved in an arch shape outward in the axial direction.
Thus, the 2 nd extending piece 12 can be disposed so as to straddle the magnet 5 with respect to the end plate 6 regardless of the length of the magnet 5. Therefore, the end plate 6 can easily secure an abutting region where the yoke biasing part 9 applies an appropriate biasing force to the yoke outer end part 15 regardless of the arrangement of the magnets 5.
In fig. 1, a circular mounting hole 10 having a center 10c and a radius r is illustrated as an example of the mounting hole. The mounting hole 10 of the body portion 7 is provided at a position corresponding to the 1 st extending piece 11 in the circumferential direction (around the axial center P) and is used for fixing the body portion 7 and the yoke 2. That is, the mounting hole 10 is provided at a position on an imaginary line segment connecting the circumferential central portion of the 1 st extending piece 11 and the axis P. The mounting hole 10 is set at a position spaced a predetermined distance from the outer edge of the shaft hole 3 radially outward from the outer edge of the shaft hole 3.
Here, the slit 16 between the 1 st extending piece 11 and the 2 nd extending piece 12 is defined by a boundary between the slit 16 and the main body portion 7 as a base end 16b of the slit 16. At this time, the position in the radial direction of the base end 16b is set between the outer edge of the shaft hole 3 and the position corresponding to the radially inner end of the magnet 5. More preferably, the base end 16b may be disposed at a position defined by a radial distance from the axial center P as follows. That is, when the distance from the axial center P to the outer side in the radial direction of the mounting hole 10 is Rd1 and the distance from the inner side in the radial direction of the distal end portion 13 is Rd2, the base end 16b may be arranged at a position where the distance from the base end 16b is longer than Rd1 and shorter than Rd 2.
Hereinafter, the radial distance from the axis P to the target element as described above is referred to as a radial distance, and the radial position of the target element is indicated and described as appropriate by the radial distance.
Fig. 5 is a view of a rotor of a motor to which an end plate according to modification 1 of the embodiment of the present invention is attached, as viewed from an axial direction. The end plate 6B shown by a solid line in fig. 5 exemplifies a case where the base end 16B is positioned in such a manner that the radial distance Rd16 of the base end 16B of the slit 16 is equal to the radial distance Rd10 to the inside in the radial direction of the outer edge of the mounting hole 10. In this case, the radial length T of the slit 16 may be T ═ X + r as shown in fig. 5. Here, X is a distance between the position of the center 10c of the mounting hole 10 and the radially outer tip of the tip 13, and r is a radius of the mounting hole 10. On the other hand, in the end plate 6 shown in fig. 1, the radial distance of the base end 16b of the slit 16 is set to a position separated from the position of the center 10c of the mounting hole 10 to the outside in the radial direction by a distance of about X/2. As long as the radial position of the base end 16b of the slit 16 is set as described above, the end plate 6 can obtain the radial length of the slit 16 as follows: the rigidity of the entire end plate can be ensured, and the urging force of the 1 st extension piece 11 and the urging force of the 2 nd extension piece 12 can be caused to act independently of each other.
As described above, the 2 nd extending pair 12p having the two 2 nd extending pieces 12 is located between the 1 st extending pieces 11 adjacent in the circumferential direction. The base ends of the two 2 nd extending pieces 12 of the 2 nd extending pair 12p are common, and the bent portion 17 is also common. The slits 18 of the 2 nd extending pair 12p are provided between the magnets 5 adjacent in the circumferential direction so as to avoid the magnets 5. Thus, as shown in fig. 1, for example, two 2 nd extension pairs 12p adjacent to each other correspond to one yoke outer end portion 15. That is, as shown in fig. 1, for example, the second 2 nd extending piece 12 of the first 2 nd extending pair 12p is disposed on one side in the circumferential direction of the yoke outer end 15, and the second 2 nd extending piece 12 of the second 2 nd extending pair 12p is disposed on the other side in the circumferential direction of the yoke outer end 15.
Fig. 6 is a view of a rotor of a motor to which an end plate according to modification 2 of the embodiment of the present invention is attached, as viewed from an axial direction. The end plate 6C shown in fig. 6 exemplifies a case where the width in the circumferential direction of the slit 18 between the 2 nd extending pieces 12 adjacent in the circumferential direction of the 2 nd extending pair 12p is close to the width between the magnets 5 adjacent in the circumferential direction. On the other hand, the end plate 6 shown in fig. 1 shows an example in which the width in the circumferential direction of the slit 18 is set to a width of about 1/6 which can ensure that the width in the circumferential direction of the distal end portion 14 of the 2 nd extending piece 12 is the width of the magnet 5. By setting the width of the slit 18 in the circumferential direction to the above range, the 2 nd extending piece 12 can be prevented from abutting on the magnet 5, and the biasing force can be effectively applied to the yoke outer end 15 by the tip end portion 14.
The 1 st extending piece may be configured to abut against the permanent magnet at a plane portion between the distal end and the base end thereof. Fig. 7 is a view of a rotor of a motor to which the end plate of the 3 rd modification of the embodiment of the present invention configured as above is attached, as viewed in the axial direction. Fig. 8 is a cross-sectional view of CC-CC shown in fig. 7. In fig. 8, the lower side is the axially inner side.
As shown in fig. 7 and 8, the length from the axial center P to the tip end of the tip end portion 13D of the 1 st extending piece 11D of the magnet biasing portion 8D of the end plate 6D is substantially the same as the length from the axial center P to the tip end of the tip end portion 14 of the 2 nd extending piece 12 (the length equal to the radius of the yoke 2). That is, in the present modification 3, the radial distances to the radial tips of the 1 st extending piece 11D, the 2 nd extending piece 12, and the yoke 2 are substantially equal. Alternatively, the position of the tip 13D of the 1 st extending piece 11D may be a predetermined position that is radially outward of the radially inward end of the permanent magnet 5 and radially inward of the outer periphery of the yoke 2.
As with the 1 st extending piece 11 shown in fig. 1, in a natural state, the portion of the 1 st extending piece 11D other than the distal end portion 13D is formed on the same plane as the main body portion 7. The permanent magnet 5 protrudes axially outward from the yoke 2 in a state of being inserted into the hole 4. Therefore, the end portion of the 1 st extending piece 11D on the radially inner side of the magnet 5 between the distal end portion 13D and the base end abuts against the magnet 5 and is elastically deformed outward in the axial direction. Thereby, the 1 st extending piece 11D generates a biasing force that biases the magnet 5 inward in the axial direction. Therefore, the same effect as that of fig. 1 is obtained in this embodiment.
The 1 st extending piece 11D of the end plate 6D has a shape in which the distal end portion 13D is bent in a direction away from the yoke 2 (outward in the axial direction). Similarly to the distal end portion 13 of the 1 st extending piece 11 shown in fig. 1, the distal end portion 13D of the 1 st extending piece 11D is formed in an arc shape in plan view.
In this case, a weight (e.g., a balance putty) may be attached to the bent structure of the distal end portion 13D. That is, in the configuration in which the permanent magnet 5 is in contact between the base end and the distal end 13D of the 1 st extension piece 11D, the distal end 13D may be provided with a weight holding portion that is bent in a direction away from the yoke 2. Thus, when the weight for canceling the eccentricity is attached to the axially outer side of the 1 st extension piece 11D, the distal end portion 13D functions as a movement suppression portion that suppresses the movement of the weight radially outward. Therefore, even when the centrifugal force generated by the high-speed rotation of the rotor 1 is large, the end plate 6D can make the balance weight less likely to scatter radially outward.
The above embodiment is configured as follows: the 1 st extending pieces 11, 11D abut on the circumferential central portion of the permanent magnet 5, and the 2 nd extending piece 12 is positioned on the right and left of the 1 st extending pieces 11, 11D. As another embodiment, the positions of the 1 st extending pieces 11 and 11D and the position of the 2 nd extending piece 12 may be switched. Fig. 9 is a view of a rotor of a motor to which the end plate of the 4 th modification of the embodiment of the present invention having such a configuration that the positions are exchanged is attached, as viewed from the axial direction.
In the end plate 6E shown in fig. 9, the 2 nd extending piece 12E of the yoke biasing portion 9E is provided so as to intersect with the permanent magnet 5 at the circumferential center portion of the permanent magnet 5 and extend in the radial direction. Thereby, the distal end portion 14E of the 2 nd extending piece 12E abuts on the circumferential central portion of the yoke outer end portion 15 of the yoke 2.
In addition, the 1 st extending piece 11E of the magnet biasing portion 8E is provided at both side positions in the circumferential direction of the 2 nd extending piece 12E. That is, two 1 st extending pieces 11E are provided between 2 nd extending pieces 12E adjacent in the circumferential direction, respectively. In the present modification, a slit 19 is provided between the two 1 st extending pieces 11E, and the slit 19 and the two 1 st extending pieces 11E on both sides thereof constitute a 1 st extending pair 11Ep as shown in fig. 9. In this example, the mounting hole 10 is provided so as to overlap the base end of the 2 nd extending piece 12E.
For example, the tip portion 13E is a contact portion of the 1 st extension piece 11E with the magnet 5. The width (length in the circumferential direction) of each tip portion 13E is 1/6 or more and 1/3 or less of the width (length in the circumferential direction) of the magnet 5 that abuts the 1 st extending piece 11E. Thus, the end plate 6E can sufficiently apply the biasing force of the 1 st extending piece 11E to the corresponding magnet 5, and can secure a sufficient space for providing the 2 nd extending piece 12E.
Preferably, the position of the slit 19 closest to the axial center P in the radial direction, that is, the position of the base end, is located radially inward of the slit 18 between the 2 nd extending pieces 12 in the example of fig. 1. For example, the proximal end of the slit 19 is provided at a radial position having substantially the same radial distance as the center of the mounting hole 10 of the main body 7. The deviation of the axial length between the plurality of magnets 5 is larger than the deviation of the axial length of the yoke outer end portion 15. Therefore, the elastic deformation of one 1 st extending piece 11E of the adjacent 1 st extending pieces 11E has a large influence on the other 1 st extending piece 11E. Therefore, if the radial length of the slit 19 is lengthened, the adjacent 1 st extending pieces 11E can be prevented from interfering with each other.
However, the radial length of the slit 19 may be shortened when the tolerance of the magnet 5 is suppressed to be relatively small. Further, the following configuration may be adopted: the slits 19 are not provided, and the end portions of the permanent magnet and another permanent magnet adjacent thereto on the side close to each other are brought into contact with one of the first extending pieces 11E.
Fig. 10 is a view of a rotor of a motor to which an end plate according to modification 5 of the embodiment of the present invention is attached, as viewed from an axial direction. Instead of the 2 nd extending piece 12 shown in fig. 1, a yoke biasing portion 9F having an annular shape in which a surface abutting against the yoke outer end portion 15 is formed may be used as in the end plate 6F shown in fig. 10. In other words, the annular outer edge portion of the body portion 7F may be located near the outer periphery of the yoke 2 and may function as the yoke biasing portion 9F.
In the example shown in fig. 10, the 1 st extending piece 11F of the magnet biasing portion 8F radially extends outward in the radial direction, similarly to the example shown in fig. 1. That is, C-shaped slits 21 as shown in fig. 10 are formed in the main body portion 7F so as to correspond to the 1 st extending pieces 11F. The slit 21 is formed by: between the 1 st extending piece 11F and the body portion 7F, the 1 st extending piece 11F is cut out in the radial direction on both sides in the circumferential direction, and is cut out in the circumferential direction at a position radially outward of the tip end portion 13F of the 1 st extending piece 11F. The radial distance of the radial base end of the slit 21 of the mounting hole 10 is within the range of the radial distance of the mounting hole 10. The periphery of the magnet biasing portion 8F is cut out in the radial direction and the circumferential direction so that the outer peripheral side of the magnet biasing portion 8F, that is, the radial outer side is opened.
In the yoke 2 formed by laminating thin plates, the vicinity of the outer diameter portion of the yoke 2 (the plurality of yoke outer end portions 15) is pressed over the entire circumference by the body portion 7F as in the present modification, and thus, the occurrence of rolling up of the thin plates or the like at the time of manufacturing the motor or the like can be more effectively prevented.
Fig. 11 is a view of a rotor of a motor to which an end plate according to modification 6 of the embodiment of the present invention is attached, as viewed from an axial direction. Similarly to the yoke biasing portion 9F shown in fig. 10, the yoke biasing portion 9G of the end plate 6G shown in fig. 11 is also configured as an annular surface that is a part of the body portion 7G and abuts against the yoke outer end portion 15. The 1 st extending piece 11G of the magnet biasing portion 8G extends radially inward from the annular yoke biasing portion 9G (main body portion 7G). Therefore, the distal end portion 13G of the 1 st extending piece 11G is located radially inward of the base end. The periphery of the magnet biasing portion 8G is cut out in the radial direction and the circumferential direction so that the radial inner side, which is the axial center P side of the magnet biasing portion 8G, is opened.
In the present modification, C-shaped slits 22 as shown in fig. 11 are formed in the main body portion 7G so as to correspond to the 1 st extending pieces 11G. The slit 22 is formed by: between the 1 st extending piece 11G and the body portion 7G, the 1 st extending piece 11G is cut out in the radial direction on both sides in the circumferential direction, and is cut out in the circumferential direction at a position radially inward of the tip end portion 13G of the 1 st extending piece 11G. The mounting hole 10 is located radially inward of the distal end portion 13G of the 1 st extension piece 11G.
In the structures of fig. 10 and 11, the end plates 6F and 6G can apply a sufficient force to an appropriate portion of at least either one of the permanent magnet 5 and the yoke 2.
In addition, when the annular yoke biasing portions 9F and 9G as shown in fig. 10 and 11 are located near the outer diameter of the yoke 2, the shaft holes 3 inside the body portions 7F and 7G may not be circular.
In the above embodiment, the plurality of permanent magnets 5 are arranged so that all angles formed by circumferentially adjacent magnets 5 are equal. That is, the plurality of magnets 5 are arranged on a virtual line (V1 shown in fig. 2) that draws a virtual polygon when viewed from the axial direction. Instead, the plurality of magnets 5 may be arranged on an imaginary line other than the polygon. For example, as such a modification, among the plurality of magnets 5, the angle formed by the 1 st magnet 5 among the plurality of magnets 5 and the 2 nd magnet 5 adjacent to the 1 st magnet 5 in the circumferential direction is an acute angle. The plurality of magnets 5 may be arranged such that the angle formed by the 2 nd magnet 5 and the 3 rd magnet 5 is an obtuse angle, and the 3 rd magnet 5 is adjacent to the 2 nd magnet 5 on the opposite side of the 2 nd magnet 5 in the circumferential direction from the 1 st magnet 5. That is, the plurality of magnets 5 may be arranged on an imaginary line that draws an imaginary star shape when viewed from the axial direction.
Fig. 12 is a view of a rotor of a motor to which an end plate according to modification 7 of the embodiment of the present invention is attached, as viewed from an axial direction. In the end plate 6H shown in fig. 12, a plurality of (16 in this example) magnets 5 are arranged on an imaginary line V2 that draws an imaginary star. The end plate 6H is configured such that the tip end portion 13H of the 1 st extending piece 11H of the magnet biasing portion 8H abuts on the end portion located on the virtual line V2 on the outer side in the radial direction of the magnet 5. That is, the 1 st extending piece 11H is provided to extend on the radially outer end portion of the circumferentially adjacent magnet 5, across the adjacent magnet 5. The 2 nd extending piece 12H of the yoke biasing portion 9H is provided to extend further radially outward from a position where a radial distance from the base end of the 2 nd extending piece 12H is substantially equal to a radial distance from the center of the permanent magnet 5.
In addition, end plate 6H shown in fig. 12 is not provided with mounting hole 10 for fixing to yoke 2. Instead, in the end plate 6H, the slits 18 between the 2 nd extending pieces 12H adjacent in the circumferential direction function as fixing portions to the yoke 2. For example, the inner diameter side of the slit 18 is formed in an arc shape having a diameter through which the rivet can pass. A rivet (not shown) is fixed to a mounting hole 20 formed in the yoke 2 through the slit 18, thereby mounting the end plate 6H to the yoke 2. At this time, end plate 6H is sandwiched between the head of the rivet and yoke 2, and end plate 6H is fixed to yoke 2.
The plurality of magnets 5 are not limited to the flat plate-shaped permanent magnets, and permanent magnets having an arc-shaped cross section may be used. Fig. 13 and 14 are views obtained from an axial view of a state in which an end plate is attached to a rotor of a motor having a permanent magnet with an arc-shaped cross section.
In the rotor 1I shown in fig. 13 and 14, a plurality of (8 in this example) permanent magnets 5I having an arc-shaped curved surface are arranged so as to project radially inward when viewed from the axial direction. In fig. 13, an end plate 6Ia is attached, and this end plate 6Ia is configured to press the end portions of the permanent magnets 5I adjacent in the circumferential direction against each other by one 1 st extending piece 11H, similarly to the end plate 6H shown in fig. 12. Alternatively, the end plate 6Ia may have the same configuration as the end plate 6E shown in fig. 9.
As shown in fig. 14, an end plate 6Ib that presses the center portion of each permanent magnet 5I with one 1 st extension piece 11 may be attached. In fig. 14, the end plate 6Ib has the same configuration as the end plate 6G shown in fig. 11. However, the same structure as that of each end plate in fig. 1, 5, 6, 7, etc., may be adopted.
The end plates 6, 6B to 6H, 6Ia, and 6Ib described above are attached to at least one end portion of the yoke 2 in the axial direction. Fig. 15A, 15B, and 15C are views of a rotor of a motor to which an end plate according to an embodiment of the present invention is attached, as viewed from the side.
As shown in fig. 15A, one yoke 2 is attached to the shaft S. End plates 6 shown in fig. 1 are attached to both sides of the yoke 2 in the axial direction. As shown in fig. 15B, two yokes 2 are attached to the shaft S, and the two yokes 2 are connected in the axial direction. A plate-shaped end plate 23 is interposed between the two yokes 2. An end plate 6 is attached to each yoke 2 on the side opposite to the side on which the end plate 23 is provided. That is, when the two yokes 2 are regarded as one rotor core, the end plates 6 are attached to both sides of the rotor core in the axial direction. The plate-shaped end plate 23 has a shape such that the magnet biasing portion 8 and the yoke biasing portion 9 are not independent, for example, a ring shape.
As shown in fig. 15C, one yoke 2 is attached to the shaft S, and the end plate 6 is attached to only one end portion in the axial direction of the yoke 2. A plate-shaped end plate 23 is attached to the other end portion of the yoke 2 in the axial direction. As described above, even when the end plate 6 is provided only at one end in the axial direction, the yoke 2 and each permanent magnet 5 can be biased independently of each other by the biasing force generated by the end plate 6.
As another aspect, the present invention may be configured as follows: the yoke outer end 15 is urged by an end plate provided at one end portion of the yoke 2 in the axial direction, and the permanent magnet 5 is urged by an end plate provided at the other end portion of the yoke 2 in the axial direction.
Fig. 16A and 16B are views showing another modification of the present embodiment. Fig. 16A shows a view of the rotor as viewed from the 1 st end plate side, and fig. 16B shows a view of the rotor as viewed from the 2 nd end plate side. The rotor 1J of the motor in this example includes a yoke 2, a permanent magnet 5, a 1 st end plate 6Ja, and a 2 nd end plate 6 Jb. The magnet 5 is inserted into the hollow hole 4 opened at least one end portion in the axial direction of the yoke 2. The 1 st end plate 6Ja is provided at one end portion of the yoke 2 in the axial direction. The 2 nd end plate 6Jb is provided at the other end portion in the axial direction of the yoke 2.
The 1 st end plate 6Ja includes a 1 st body portion 7Ja and a yoke biasing portion 9J. The 1 st body portion 7Ja abuts against the yoke 2 and has an annular shape. The yoke biasing portion 9J extends radially outward from the first body portion 7Ja and abuts against the yoke outer end portion 15, thereby biasing the yoke outer end portion 15 axially inward. The 2 nd end plate 6Jb includes a 2 nd body portion 7Jb and a magnet urging portion 8J. The 2 nd body portion 7Jb abuts against the yoke 2 and has an annular shape. The magnet biasing portion 8J extends radially outward from the 2 nd main body portion 7Jb, and is in contact with the magnet 5 to bias the magnet 5 axially inward.
The magnet biasing portion 8J includes a 1 st extending piece 11J extending radially outward from the 2 nd main body portion 7 Jb. The tip 13J of the 1 st extension piece 11J abuts against the magnet 5. The yoke biasing portion 9J includes a 2 nd extending piece 12J extending radially outward from the 1 st body portion 7 Ja. The distal end portion 14J of the 2 nd extending piece 12J abuts against the yoke outer end portion 15 of the yoke 2.
According to the above configuration, the magnet biasing portion 8J provided in the 2 nd end plate 6Jb generates a biasing force for biasing the magnet 5 inward in the axial direction. Then, a yoke biasing portion 9J provided in the 1 st end plate 6Ja generates a biasing force for biasing the yoke outer end portion 15 inward in the axial direction. Therefore, even in the above-described configuration, a sufficient urging force can be applied to appropriate portions of the magnet 5 and the yoke 2.
Next, a motor including the rotor of the motor according to the embodiment of the present invention will be described. The end plate according to the embodiment of the present invention described above is attached to the rotor of the motor.
Fig. 17 is a conceptual diagram of a motor according to an embodiment of the present invention. As shown in fig. 17, the motor 40 includes a rotor 1 of the motor, a stator 30 of the motor, and a bearing 36.
The stator 30 of the motor extends along an axial center P included in the shaft S of the rotor 1 of the motor. The stator 30 of the motor is located radially outward of the rotor 1, opposite the rotor 1 of the motor.
The bearing 36 rotatably supports the rotor 1 of the motor.
Further detailed description will be made with reference to the accompanying drawings.
The motor 40 shown in fig. 17 is a main part constituting the motor. Generally, the motor is mounted in a housing constituting a housing of the motor 40. Alternatively, the motor is molded with resin so as to cover the motor 40, and is used as a molded motor.
The stator 30 of the motor 40 includes a stator core 32 and a coil 34. The stator core 32 can be formed by laminating steel plates. The coil 34 is formed by winding an electric wire around the stator core 32. As a method of winding the coil 34 around the stator core 32, a distributed winding, a concentrated winding, a toroidal winding, and the like are known.
An insulator made of resin or the like can be inserted between stator core 32 and coil 34. When an insulator is used, electrical insulation can be secured between stator core 32 and coil 34.
In the present configuration, a predetermined gap is provided between the rotor 1 of the motor and the stator 30 of the motor, which are opposed to each other.
Also, the motor 40 has a bearing 36. As shown in fig. 17, the pair of bearings 36 of the motor 40 according to the embodiment of the present invention is attached to the shaft S with the rotor core 50 interposed therebetween. The rotor core 50 can be formed by laminating steel plates. The rotor core 50 of the present embodiment has a plurality of permanent magnets 5 inside. The rotor core 50 is mounted to the shaft S. Further, depending on the structure of the motor 40, there is also a case where a cantilever structure, that is, only one bearing 36 is used. The bearing 36 may be attached to a structure constituting a housing of the motor 40, for example, a bracket.
The motor 40 configured as described above is supplied with electric power from the outside of the motor 40. The control current based on the supplied power forms a predetermined current waveform and flows into the coil 34. A magnetic flux is generated by the current flowing in the coil 34. The rotor 1 of the motor rotates according to the generated magnetic flux. Therefore, the motor 40 can enjoy and enjoy the effects of the end plate 6 described above.
While the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various improvements, changes, and modifications can be made without departing from the scope of the invention.
For example, the mounting hole 10 of the main body 7 may be provided at a position corresponding to the 2 nd extending piece 12 (a position on a virtual line segment connecting the circumferential central portion of the 2 nd extending piece 12 and the axis P), or may be provided at a position corresponding to a position between the 1 st extending piece 11 and the 2 nd extending piece 12 (a position on a virtual line segment connecting the circumferential central portion of the 2 nd extending piece 12 and the axis P).
The number of permanent magnets 5 (the number of holes 4) is not limited to the above example (8 or 16), and may be larger or smaller.
In the above-described embodiment, the opening portions of the holes 4 through which the permanent magnets 5 are inserted are provided at both axial end portions of the yoke 2 to which the end plates 6, 6B to 6H are to be attached, but the opening portions of the holes 4 may be provided only at one axial end portion of the yoke 2, and the end plates 6, 6B to 6H may be attached to the axial end portion of the yoke 2 at which the opening portions are provided.
Industrial applicability
The present invention is useful in applying sufficient force to the appropriate portions of the permanent magnet and the yoke.
Description of the reference numerals
1. 1I, 1J, a rotor; 2. a magnetic yoke; 2s, end face of magnetic yoke; 3. a shaft hole; 4. a void; 5. 5I, a magnet (permanent magnet); 6. 6B, 6C, 6D, 6E, 6F, 6G, 6H, 6Ia, 6Ib, 23, end plates; 6Ja, 1 st end plate; 6Jb, 2 nd end plate; 7. 7F, 7G, a main body portion; 7Ja, 1 st body part; 7Jb, 2 nd body part; 8. 8D, 8E, 8F, 8G, 8H, 8J, magnet biasing part; 9. 9E, 9F, 9G, 9H, 9J, yoke biasing part; 10. 20, mounting holes; 10c, a center; 11. 11D, 11E, 11F, 11G, 11H, 11J, 1 st extension piece; 11Ep, extension pair 1; 12. 12E, 12H, 12J, No. 2 extension piece; 12p, 2 nd extension pair; 13. 13D, 13E, 13F, 13G, 13H, 13J, 14E, 14J, apical part; 15. the outer end part of the magnetic yoke; 16. 18, 19, 21, 22, slits; 16b, base end; 17. a bending section; 30. a stator; 32. a stator core; 34. a coil; 36. a bearing; 40. a motor; 50. rotor core
Claims (14)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017064518 | 2017-03-29 | ||
| JP2017-064518 | 2017-03-29 | ||
| PCT/JP2018/011966 WO2018181087A1 (en) | 2017-03-29 | 2018-03-26 | End plate, motor rotor provided with same, and motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110447159A CN110447159A (en) | 2019-11-12 |
| CN110447159B true CN110447159B (en) | 2021-12-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201880020116.8A Active CN110447159B (en) | 2017-03-29 | 2018-03-26 | End plate, rotor of motor provided with end plate and motor |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP7209148B2 (en) |
| CN (1) | CN110447159B (en) |
| WO (1) | WO2018181087A1 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005130688A (en) * | 2003-10-01 | 2005-05-19 | Asmo Co Ltd | Magnets-embedded rotor and electric motor |
| JP2016092984A (en) * | 2014-11-05 | 2016-05-23 | 三菱重工オートモーティブサーマルシステムズ株式会社 | Rotor for motor and motor |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4661261B2 (en) * | 2005-02-22 | 2011-03-30 | トヨタ自動車株式会社 | Rotor structure of rotating electrical machine |
| CN102044922A (en) * | 2005-09-27 | 2011-05-04 | 信浓绢糸株式会社 | Rotor of permanent magnet motor |
| JP2010063285A (en) * | 2008-09-04 | 2010-03-18 | Nidec Shibaura Corp | Motor and manufacturing method thereof |
| CN201374597Y (en) * | 2009-03-16 | 2009-12-30 | 东元总合科技（杭州）有限公司 | Permanent magnet wind power generator rotor |
| JP5141749B2 (en) * | 2010-12-06 | 2013-02-13 | トヨタ自動車株式会社 | End plate and rotor of rotating electric machine using the same |
| JP5333502B2 (en) * | 2011-04-01 | 2013-11-06 | 株式会社デンソー | Rotating electrical machine rotor |
| JP5353939B2 (en) * | 2011-04-01 | 2013-11-27 | 株式会社デンソー | Rotating electrical machine rotor |
| US8970085B2 (en) * | 2011-04-01 | 2015-03-03 | Denso Corporation | Rotor for electric rotating machine and method of manufacturing the same |
| JP5496255B2 (en) * | 2012-05-31 | 2014-05-21 | 三菱電機株式会社 | Method for manufacturing rotor of magnet type rotating electrical machine and manufacturing apparatus thereof |
| CN103390943B (en) * | 2013-07-20 | 2015-12-02 | 浙江尤里卡机电有限公司 | A kind of structure of internal rotor of ferrite steel magnet type motor and assemble method thereof |
| DE102015112862A1 (en) * | 2014-08-06 | 2016-02-18 | Johnson Electric S.A. | Brushless DC motor and rotor of it |
| CN204947760U (en) * | 2015-09-17 | 2016-01-06 | 瑞智精密股份有限公司 | Magnet-clamping type rotor device |
| TWI572119B (en) * | 2015-10-16 | 2017-02-21 | 建準電機工業股份有限公司 | Internal rotor motor and rotor thereof |
| CN106059141B (en) * | 2016-05-27 | 2019-05-03 | 广东美芝制冷设备有限公司 | Rotor, magneto and compressor with rotor |
-
2018
- 2018-03-26 WO PCT/JP2018/011966 patent/WO2018181087A1/en not_active Ceased
- 2018-03-26 JP JP2019509753A patent/JP7209148B2/en active Active
- 2018-03-26 CN CN201880020116.8A patent/CN110447159B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005130688A (en) * | 2003-10-01 | 2005-05-19 | Asmo Co Ltd | Magnets-embedded rotor and electric motor |
| JP2016092984A (en) * | 2014-11-05 | 2016-05-23 | 三菱重工オートモーティブサーマルシステムズ株式会社 | Rotor for motor and motor |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018181087A1 (en) | 2018-10-04 |
| JPWO2018181087A1 (en) | 2020-02-13 |
| CN110447159A (en) | 2019-11-12 |
| JP7209148B2 (en) | 2023-01-20 |
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