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Rotor and electric motor including the rotor

A technology of motors and rotors, applied in the field of motors, can solve problems such as pressure drop

Active Publication Date: 2016-08-24
FANUC LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, when one supply path 112 is branched into a plurality of return paths 116, a sudden pressure drop tends to occur.

Method used

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  • Rotor and electric motor including the rotor
  • Rotor and electric motor including the rotor
  • Rotor and electric motor including the rotor

Examples

Experimental program
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Embodiment Construction

[0021] Embodiments of the present invention will be described below with reference to the drawings. Structural elements of the illustrated embodiments are appropriately dimensioned to facilitate understanding of the present invention. In addition, the same reference signs are used for the same or corresponding structural elements.

[0022] Figure 1A and Figure 1B It is a longitudinal sectional view showing the rotor 10 of the electric motor according to one embodiment. Figure 1B said to make Figure 1A The state after the rotor 10 rotates 90 degrees around the rotation axis O.

[0023] The rotor 10 includes a rotary shaft 12 rotatable around a rotary axis O and a rotor 14 fitted to the outer peripheral surface of the rotary shaft 12 . The electric motor also includes a stator (not shown) on the outer side of the rotor 14 . The rotor 14 is configured to apply rotational power to the rotary shaft 12 in cooperation with the stator. Various types of electric motors are k...

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PUM

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Abstract

Provided are a rotor and an electric motor including the rotor. The rotor is formed with a flow path for supplying a cooling fluid. The flow path has a supply path extending inside the rotor, a plurality of branch paths branching off from the supply path, and return paths extending from the respective branch paths toward a base end side of the supply path. The branch paths are at positions distant from each other in a direction parallel to a rotational axis of the rotor.

Description

technical field [0001] The present invention relates to a rotor and a motor including the rotor. Background technique [0002] In a rotor of an electric motor, a cooling structure for supplying a cooling fluid to the inside of the rotor is known. For example, there is known a spindle device that cools the rotor from the inside of the rotor by circulating a cooling fluid through a flow path formed inside the spindle (see Japanese Patent Laid-Open No. 1-092048 and Japanese Patent Laid-Open No. 4-164548 Bulletin). [0003] In order to uniformly cool the entire rotor, it is preferable to branch the flow path. image 3 It is a vertical cross-sectional view showing a rotor 100 of a motor according to the related art. The rotor 100 includes a rotating shaft 104 rotatable around a rotating axis 102 and a rotor 106 that generates power for rotating the rotating shaft 104 . A flow path 110 through which cooling fluid circulates is formed inside the rotating shaft 104 . The flow pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/32
CPCH02K1/32H02K9/197
Inventor 铃木孝太郎
Owner FANUC LTD