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Motor unit

A technology for motors and motor housings, which is applied to electrical components, electrical components, bearing components, etc., can solve the problem that the installation accuracy affects the position accuracy of the connecting parts, and achieve the effect of improving the position accuracy.

Pending Publication Date: 2021-03-30
NIDEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a problem that the mounting accuracy of the connecting member affects the radial position accuracy of the connecting member with respect to the motor main body.

Method used

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Experimental program
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Embodiment Construction

[0015] figure 1 It is a perspective view showing the appearance of the motor unit 10 of this embodiment. figure 2 It is a top view looking at the motor unit 10 of this embodiment from above. image 3 It is a figure showing the internal structure of the motor unit 10 of this embodiment, and is figure 2 Sectional view of III-III.

[0016] Such as Figure 1 ~ Figure 3 As shown, the motor unit 10 has a motor main body 20, a motor housing 30, a holding member 90, a control unit 50 (refer to image 3 ), upper cover 60, upper bearing 29A, lower bearing 29B. In addition, the motor unit 10 of the present embodiment further includes a gear box (connection member) 40 .

[0017] In the following description, the central axis J (refer to image 3 ) parallel direction is referred to as "axial" or "up and down direction", the radial direction centered on the central axis J is referred to as "radial" for short, and the circumferential direction centered on the central axis J, that is,...

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Abstract

The present invention provides a motor unit comprising: a motor main body having a rotor that rotates about a central axis and a stator that is positioned on the outside in the radial direction of therotor; a motor case that houses the motor body; a bearing having an outer ring and an inner ring and rotatably supporting the rotor; and a holding member that is fixed to the motor case on one side in the axial direction of the motor case and holds the outer ring. The outer ring is provided with a first insertion region, a fixed region, and a second insertion region arranged in this order towardone side in the axial direction. The outer ring is inserted into a first holding hole provided in the motor case in the first insertion region, is fixed to the holding member in the fixing region, andprotrudes toward one side in the axial direction with respect to the holding member in the second insertion region.

Description

technical field [0001] The invention relates to motor units. Background technique [0002] The housing of the motor holds bearings that rotatably support the shaft. In Patent Document 1, a structure is proposed in which an outer ring of a bearing is sandwiched from both sides in the axial direction by a housing and a mounting plate. In the structure described in Patent Document 1, there is a structure in which the mounting plate is brought into contact with the outer peripheral surface of the outer ring in order to improve the coaxiality of the mounting plate with respect to the motor. [0003] Patent Document 1: Japanese Patent Laid-Open No. 2018-068000 [0004] In existing constructions, the components associated with the motor are fixed to the mounting plate. Therefore, there is a problem that the mounting accuracy of the connecting member affects the radial positional accuracy of the connecting member with respect to the motor main body. Contents of the invention ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K5/16H02K7/116
CPCH02K5/165H02K7/116F16C19/06H02K5/1732H02K5/08H02K15/12F16C2380/26F16C35/077F16C2226/60
Inventor 山口雄平青野真乡园田将司
Owner NIDEC CORP