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Motor and method of manufacturing the motor

A manufacturing method and motor technology, applied in the manufacture of motor generators, manufacture of stator/rotor body, magnetic circuit shape/style/structure, etc., can solve problems such as difficult rotor magnet fixation, support component deformation, rotor magnet deformation, etc. Improvement of productivity, suppression of deformation, and easy management of dimensional accuracy are achieved

Active Publication Date: 2019-11-22
NIDEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the structure of the conventional stepping motor described in Japanese Patent Application Laid-Open No. 2001-128436, for example, when the rotor assembly is assembled by press-fitting the rotor magnet and the shaft into the support member, the support member may be deformed.
Therefore, there is a problem that it is difficult to fix the rotor magnet to the support member with high precision due to the fear of deformation of the part where the rotor magnet is fixed.

Method used

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  • Motor and method of manufacturing the motor
  • Motor and method of manufacturing the motor
  • Motor and method of manufacturing the motor

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach ＞

[0023]

[0024] A schematic configuration of a motor according to an exemplary first embodiment of the present invention will be described. figure 1 It is a cutaway longitudinal end view of the motor according to the first embodiment of the present invention. figure 1 The motor 1 shown has a stator 2 and a rotor 3 .

[0025] The stator 2 is formed in an annular shape. The stator 2 has a stator housing 21 . The stator case 21 has an inner cylinder part 21a, an outer cylinder part 21b, and a connection part 21c. The inner cylinder part 21a is formed in the hollow cylindrical shape centering on a rotating shaft. The outer cylinder portion 21b is formed in a cylindrical shape centered on the rotation axis. The inner cylinder part 21a and the outer cylinder part 21b are formed coaxially. The outer cylinder portion 21b is disposed radially outward of the inner cylinder portion 21a. The connecting portion 21c is formed in a disk shape centered on the rotation axis, and connec...

no. 2 Embodiment approach ＞

[0077]

[0078] Next, a motor according to an exemplary second embodiment of the present invention will be described. Figure 6 It is a partially enlarged longitudinal sectional view of a rotor of a motor according to a second embodiment of the present invention. In addition, since the basic structure of this embodiment is the same as that of the first embodiment described above, the same reference numerals or the same names as those of the first embodiment may be assigned to the same constituent elements as before, and description thereof may be omitted.

[0079] The rotor 3 has a protruding portion 34 radially protruding from the holder cylindrical portion 32a. The protruding portion 34 is formed in a region adjacent to the flange portion 32b in the axial direction. The protruding portion 34 protrudes radially outward from the outer peripheral surface of the holder cylindrical portion 32a.

[0080] The cage 32 has a separation portion 41 and a fitting portion 42 that are...

no. 3 Embodiment approach ＞

[0094] Next, a motor according to an exemplary third embodiment of the present invention will be described. Figure 8 It is a partially enlarged longitudinal sectional view of a rotor of a motor according to a third embodiment of the present invention. In addition, since the basic structure of this embodiment is the same as that of the first embodiment described above, the same reference numerals or the same names as those of the first embodiment may be assigned to the same constituent elements as before, and description thereof may be omitted.

[0095] The rotor 3 has a protruding portion 34 radially protruding from the holder cylindrical portion 32a. The protruding portion 34 is formed in a region away from the flange portion 32b in the axial direction. The protruding portion 34 protrudes radially outward from the outer peripheral surface of the holder cylindrical portion 32a.

[0096] The cage 32 has a separation portion 41 and a fitting portion 42 that are continuous in ...

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Abstract

The present invention provides a motor and a manufacturing method thereof. The motor has a rotor and a stator, the rotor has a shaft as a rotating shaft, a holding rack and a magnet, wherein the holding rack is configured at the radial outer side of the shaft, and has a hollow holding rack cylinder; a flange part extending from the holding rack cylinder to a radial inner side; and a hub extending upwards in an axial direction from the edge at the radial inner side of the flange part. The shaft is fixed to the hub, the magnet is configured at the radial outer side of the holding rack and has a hollow magnet cylinder, and the holding rack cylinder or the magnet cylinder has a protrusion part protruding along the radial direction, and the holding rack or the magnet has a separation part and an embedding part which are continuous in the axial direction. At the separation part, at least one part of the outer circumferential surface of the holding rack and at least one part of the inner circumferential surface of the magnet are arranged oppositely at intervals in the radial direction, and at the embedding part, the outer circumferential surface of the holding rack and the inner circumferential surface of the magnet are embedded with the help of the protrusion part.

Description

technical field [0001] The present invention relates to a motor and a method of manufacturing the motor. Background technique [0002] Conventionally, a motor in which a rotor having magnets and a shaft is disposed radially inside of an annular stator having a field coil has been widely known. A technique related to a motor is disclosed in JP-A-2001-128436. [0003] The conventional stepping motor described in Japanese Patent Application Laid-Open No. 2001-128436 includes an annular yoke having a field coil, and a rotor assembly including a rotor magnet and a shaft arranged radially inside the yoke. The rotor assembly has a disk-shaped support member interposed between the rotor magnet and the shaft in its radial direction. The support member is fixed to the outer periphery of the shaft and supports the rotor magnet. The radially inner and outer peripheral edges of the supporting member have flanges bent in the axial direction. This structure achieves significant weight ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K1/30H02K15/03
CPCH02K1/30H02K15/03
Inventor 清水保章坂内宣渡边裕介古川敬三
Owner NIDEC CORP
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