To realize a structure capable of reducing manufacturing costs.SOLUTION: A wheel shaft 15 has a wheel fitting surface portion 45 externally fitted with a fitting hole 39 of a worm wheel 14 at an axial direction intermediate portion of an outer peripheral surface, and has a pair of cylindrical surface-shaped inner ring fitting surface portions 46a and 46b at axial direction both side parts sandwiching the wheel fitting surface portion 45 of the outer peripheral surface. An outer diameter D45 of the wheel fitting surface portion 45 is the same as outer diameters D46a, and D46b of the inner ring fitting surface portions 46a and 46b.SELECTED DRAWING: Figure 3
【課題】製造コストを低減することができる構造を実現する。【解決手段】ホイール軸15は、外周面の軸方向中間部に、ウォームホイール14の嵌合孔39を外嵌するホイール嵌合面部45を有し、かつ、外周面のうち、ホイール嵌合面部45を挟んだ軸方向両側部分に、円筒面状の一対の内輪嵌合面部46a、46bを有する。ホイール嵌合面部45の外径D45は、内輪嵌合面部46a、46bの外径D46a、D46bと同じである。【選択図】図3
WORM WHEEL WITH SHAFT, WORM SPEED REDUCER, AND ELECTRIC POWER STEERING DEVICE
シャフト付ウォームホイール、ウォーム減速機および電動パワーステアリング装置
2021-04-22
Patent
Electronic Resource
Japanese
METHOD FOR MANUFACTURING WORM REDUCER, WORM REDUCER, AND ELECTRIC POWER STEERING DEVICE
European Patent Office | 2018
|Worm speed reducer and method for manufacturing worm wheel included in worm speed reducer
European Patent Office | 2016
|