PROBLEM TO BE SOLVED: To provide a new electric drive unit and electric power steering device having a satisfactory heat radiation characteristics capable of reducing the size of external shape and the weight and the number of components.SOLUTION: The electric drive unit has a friction stir welding part FSW in which a step recessed in a radial direction is formed in an outer periphery surface of an end face 15 of a motor housing 11 formed of aluminum type metal at the opposite side to an output part 14 of a rotation axis 23 of an electric motor, or on the outer periphery of a metal cover 12 formed of an aluminum type metal covering the electric control unit controlling the electric motor, in the step, the metal cover 12 and the motor housing 11 are engaged with each other, and the motor housing 11 and the metal cover 12 are welded to join to a fitting portion 37.SELECTED DRAWING: Figure 10
【課題】外観形状を小さくして重量及び部品点数を低減すると共に、良好な放熱特性を備えた新規な電動駆動装置及び電動パワーステアリング装置を提供することにある。【解決手段】電動モータの回転軸23の出力部14とは反対側のアルミ系金属製のモータハウジング11の端面部15の外周面、または電動モータを制御する電子制御部を覆うアルミ系金属製の金属カバー12の外周面に径方向内側に後退した段部を形成し、この段部に金属カバー12とモータハウジング11を嵌合させると共にこの嵌合部37にモータハウジング11と金属カバー12を溶着結合する摩擦撹拌接合部FSWを形成した。【選択図】図10
ELECTRIC DRIVE UNIT AND ELECTRIC POWER STEERING DEVICE
電動駆動装置及び電動パワーステアリング装置
2018-03-22
Patent
Electronic Resource
Japanese
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