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Rotor of a rotating electrical machine

A technology for rotating electrical machines and rotors, applied to electromechanical devices, electrical components, electrical components, etc., can solve the problems of reducing the pressing-fixing force, increasing the number, and high cost, and achieving the effect of avoiding the increase in the number of parts

Active Publication Date: 2019-07-30
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Therefore, when the ring is press-fitted on the other shaft end portion of the shaft, foreign matter may be caught and may cause a problem of lowering the pressing-fixing force or a problem that the ring cannot be pressed to a predetermined position
[0011] In addition, in the case of Publication No. 11-69675, the number of parts increases due to the use of rings, and there is also a problem of higher cost

Method used

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  • Rotor of a rotating electrical machine
  • Rotor of a rotating electrical machine
  • Rotor of a rotating electrical machine

Examples

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Effect test

no. 1 example

[0029] will refer to figure 1 with 2 The rotor of the rotary electric machine according to the first embodiment is described.

[0030] The rotor 1 of the rotating electrical machine of the first embodiment is used for a rotating electrical machine such as, for example, a motor for a vehicle, and is housed in a casing of the rotating electrical machine while being rotatably provided on the inner periphery of a stator (not shown). on the side.

[0031] Such as figure 1 As shown, the rotor 1 has a shaft 10 having a knurled portion 11 on its outer peripheral surface; and a rotor core 20 having fitting holes coaxially fitted and fixed on the outer peripheral surface of the shaft 10 twenty one.

[0032] The shaft 10 is formed in a solid elongated shaft-like shape made of iron-based metal.

[0033] defined by figure 1 In the axial direction from right to left, the direction in which the shaft 10 is inserted into the fitting hole 21 of the rotor core 20 is taken as the shaft ins...

no. 2 example

[0075] will refer to image 3 and 4 The rotor 2 of the rotating electric machine according to the second embodiment is described.

[0076] Although the rotor 2 of the second embodiment has the same basic configuration as that of the first embodiment, it differs from the rotor 1 of the first embodiment in that a groove-shaped space portion 31 formed on the shaft 10 is added.

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Abstract

The rotor includes a shaft, and a rotor core that is fitted and fixed to the shaft. The shaft includes a knurled portion on an end side and a small-diameter portion formed in a tip side via a first stepped surface. The rotor core includes a small diameter hole formed in a tip side end portion of the fitting hole press-fitted onto the small diameter portion, a large diameter hole formed in an end side of the small diameter hole via a second stepped surface, and a press-fitting portion press-fitted onto the knurled portion and is formed on an end side end portion of the large diameter hole. A space part is disposed between the first stepped surface and the second stepped surface.

Description

technical field [0001] The present invention relates to a rotor used as a rotating electrical machine of an engine or generator mounted on a vehicle such as, for example, a hybrid vehicle or an electric vehicle. Background technique [0002] Conventionally, as a rotating electrical machine used and mounted on a vehicle, a field rotation type synchronous motor (hereinafter referred to as an IPM motor) having a structure in which permanent magnets are embedded in a rotor is known. [0003] Since it is possible to utilize both the reluctance torque generated by the magnetization of the rotor and the reluctance torque generated by the magnetization of the permanent magnets, the IPM motor is highly efficient and thus preferably used for a hybrid vehicle or an electric vehicle, or the like. [0004] Such an IPM motor includes a stator serving as an armature and a rotor serving as a field system arranged to face the stator in a radial direction. [0005] In Japanese Patent Applica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K1/28
CPCH02K1/28H02K1/276
Inventor 生田裕之
Owner DENSO CORP
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