To provide a steering device which enables a worm gear and a worm wheel to be stably connected while achieving weight reduction of the device.SOLUTION: A steering device includes: a worm gear part 50 which is rotated by driving of an electric motor 41; a worm wheel part 60 which is connected with the worm gear part 50 and rotates in conjunction with operation of the work gear part 50; a pinion shaft 22 which is provided coaxially with the worm wheel part 60 and rotates in conjunction with operation of the worm wheel part 60; a rack shaft 21 which moves a steered part in response to rotation of the pinion shaft 22. The worm wheel part 60 has: a body part 63 which is formed by a resin material, is provided with teeth parts 611 located at an outer periphery, and rotates; and an inhibition part 67 which inhibits deformation of the body part 63 by temperature change.SELECTED DRAWING: Figure 2
【課題】装置の軽量化を図りつつ、ウォームギヤとウォームホイールとを安定して接続する。【解決手段】ステアリング装置は、電動モータ41の駆動により回転するウォームギヤ部50と、ウォームギヤ部50に接続し、ウォームギヤ部50の動作に伴って回転するウォームホイール部60と、ウォームホイール部60の同軸上に設けられ、ウォームホイール部60の動作に伴って回転するピニオン軸22と、ピニオン軸22の回転に応じて被操舵部を移動させるラック軸21と、を備える。そして、ウォームホイール部60は、樹脂材料によって形成されるとともに、外周に歯部611が設けられて回転する本体部63と、本体部63の温度変化による変形を抑制する抑制部67とを有する。【選択図】図2
STEERING DEVICE AND WORM WHEEL
ステアリング装置およびウォームホイール
2018-12-27
Patent
Elektronische Ressource
Japanisch
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