PROBLEM TO BE SOLVED: To provide a worm reduction gear which can perform a whirl stop and the come-off prevention of a worm shaft with respect to a connecting member for transmitting a drive force of an electric motor to the worm shaft by a simple constitution, an electric power steering device including the worm reduction gear, and a manufacturing method of the worm reduction gear.SOLUTION: A worm reduction gear 15 includes: a worm shaft 21 which is driven and rotated by an electric motor 16, and formed with a caulking part 21I at a one-end part 21A; a first connecting member 51; and a second connecting member 52 which is connected to a motor shaft 16A of the electric motor 16, and engaged with the first connecting member 51. In the first connecting member 51, the one-end part 21A is pressure-inserted into a penetration hole 55A, and the caulking part 21I is caulked to a recess 55B which extends to the outside in a radial direction R of the worm shaft 21 from the penetration hole 55A at an end face 55C in an axial direction X.SELECTED DRAWING: Figure 2
【課題】電動モータの駆動力をウォームシャフトに伝達するための連結部材に対するウォームシャフトの回り止めおよび抜け止めを簡単な構成によって達成できるウォーム減速機、このウォーム減速機を含む電動パワーステアリング装置、および、このウォーム減速機の製造方法を提供する。【解決手段】ウォーム減速機15は、電動モータ16によって駆動回転されて一端部21Aにかしめ部21Iが形成されたウォームシャフト21と、第1連結部材51と、電動モータ16のモータシャフト16Aに連結されて第1連結部材51と係合する第2連結部材52とを含む。第1連結部材51では、貫通穴55Aに一端部21Aが圧入され、軸方向Xにおける端面55Cにおいて貫通穴55Aからウォームシャフト21の径方向Rにおける外側へ延びる凹部55Bにおいてかしめ部21Iがかしめ固定される。【選択図】図2
WORM REDUCTION GEAR, ELECTRIC POWER STEERING DEVICE AND MANUFACTURING METHOD OF WORM REDUCTION GEAR
ウォーム減速機、電動パワーステアリング装置、および、ウォーム減速機の製造方法
2017-11-30
Patent
Electronic Resource
Japanese
WORM WHEEL, WORM REDUCTION GEAR AND ELECTRIC POWER STEERING DEVICE
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