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motor

A motor and casing technology, applied in the field of motors, can solve the problems of the bus bar cage being not firmly fixed, generating vibration or noise, reducing the service life of the motor, etc. Effect

Active Publication Date: 2018-06-15
NIDEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, for example, if the bus bar holder heat-shrinks at a low temperature, a gap is formed between the case and the bus bar holder, and the fixation of the bus bar holder becomes weak.
As a result, there is a concern that vibration or noise is generated when the motor is driven, reducing the service life of the motor

Method used

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Experimental program
Comparison scheme
Effect test

no. 1 approach ＞

[0025] figure 1 It is a sectional view showing the motor 10 of this embodiment.

[0026] The motor 10 of this embodiment is a brushless motor. Such as figure 1 As shown, the motor 10 includes a housing portion 20, a rotor 30 having a shaft 31, a stator 40, a bus bar unit 60, a plurality of O-rings, a front bearing (first bearing) 51, a rear bearing (second bearing) 52 and Oil seal 80. The plurality of O-rings includes a front-side O-ring (first O-ring) 71 and a rear-side O-ring (second O-ring) 72 .

[0027] [casing part]

[0028] The case part 20 is a cylindrical metal member in which the bus bar unit 60 is press-fitted. The case part 20 has a front case part (first case part) 21 and a rear case part (second case part) 22 . A rotor 30 , a stator 40 , a bus bar unit 60 , a front bearing 51 , a rear bearing 52 , a front O-ring 71 , a rear O-ring 72 , and an oil seal 80 are held inside the casing 20 .

[0029] (front case)

[0030] Figure 2 to Figure 4 It is a figure wh...

no. 2 approach ＞

[0170] The second embodiment differs from the first embodiment in that the main body has a group of protrusions.

[0171] In addition, about the same structure as 1st Embodiment, description may be abbreviate|omitted by attaching the same code|symbol etc. suitably.

[0172] Figure 13 and Figure 14 It is a figure which shows the bus bar unit 260 of this embodiment. Figure 13 is a stereogram. Figure 14 is a top view.

[0173] The bus bar unit 260 has a bus bar holder 261 . The bus bar holder 261 has a main body portion 261a. The main body part 261a has a plurality of protrusion part groups (contact part groups). In this embodiment, the plurality of protruding portion groups is provided in three or more. As an example, in Figure 14 3 shows an example in which three groups of protrusion parts (contact part groups) 267a, 267b, and 267c are provided as a plurality of protrusion part groups.

[0174] The protruding part groups 267a, 267b, and 267c are each composed of a...

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Abstract

The present invention provides a motor which works stably in a wide temperature range. One embodiment of the motor of the present invention includes: a rotor having a shaft; a stator; a first bearing and a second bearing supporting the shaft; a bus bar unit; , and keep the stator and first bearing. The bus bar unit has a bus bar and a resin bus bar holder that supports the bus bar. The bus bar holder has a second bearing holding portion that holds the second bearing, and a cylindrical body portion. The main body part has a cylindrical shell part. The case portion has a case receiving peripheral portion that is pressed into the case portion. The motor is characterized in that a contact portion and a non-contact portion are provided on the outer peripheral surface of the outer peripheral portion of the casing, and the contact portion is in contact with the inner peripheral surface of the casing portion and bears stress from the inner peripheral surface of the casing portion, The non-contact portion is separated from the inner peripheral surface of the case portion.

Description

technical field [0001] The invention relates to a motor. Background technique [0002] For example, a motor shown in Japanese Laid-Open Publication No. 2009-219335 is known in which a bearing on one side of a rotating shaft supporting a rotor is held by a bus bar holder, and a bearing on the other side is held by a bus bar holder. The housing of the cage. [0003] In the motor as described above, since the bus bar holder is made of resin, the difference in thermal expansion coefficient between the bus bar holder and the metal casing is large. Therefore, for example, when the bus bar holder heat-shrinks at a low temperature, a gap is formed between the case and the bus bar holder, and the fixation of the bus bar holder becomes weak. As a result, there is a concern that vibration or noise is generated when the motor is driven, reducing the service life of the motor. Contents of the invention [0004] One aspect of the present invention is made in view of the above problem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K5/04H02K5/10
CPCH02K5/225H02K3/50H02K5/08
Inventor 芳贺英博佐藤留介
Owner NIDEC CORP
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