WORM REDUCTION GEAR AND ELECTRIC POWER STEERING DEVICE INCLUDING THE SAME
WORM REDUCTION GEAR AND ELECTRIC POWER STEERING DEVICE INCLUDING THE SAME
- Neue Suche nach: SATO NAOHIRO
- Neue Suche nach: OGIDA SHINGO
- Neue Suche nach: SATO NAOHIRO
- Neue Suche nach: OGIDA SHINGO
PROBLEM TO BE SOLVED: To provide a worm reduction gear and an electric power steering device including the same, capable of reducing generation of noise caused by movement in a radial direction, of a worm shaft.SOLUTION: A worm reduction gear 17 includes a housing 17a, a worm wheel and a worm shaft 18 accommodated in the housing 17a, a first bearing 30 loosely fitted to the worm shaft 18, a step portion 181 disposed on the worm shaft 18 and opposed to the first bearing 30 in the axial direction X, an elastic body 42 axially held by the step portion 181 and the first bearing 30, and a stopper 44. The stopper 44 is disposed on the elastic body 42 with clearances P3, P4, so that deformation of the elastic body 42 to an outer side in the radial direction R by being kept into contact with the elastic body 42 from the outer side in the radial direction R of the worm shaft 18, when the load received from the worm shaft 18 by the elastic body 42 is increased.
【課題】ウォームシャフトの径方向への移動に起因した異音の発生を低減できるウォーム減速機およびそれを備えた電動パワーステアリング装置を提供すること。【解決手段】ウォーム減速機１７は、ハウジング１７ａと、ハウジング１７ａに収容されるウォームホイールおよびウォームシャフト１８と、ウォームシャフト１８に対して隙間嵌めされた第１軸受３０と、ウォームシャフト１８に設けられて軸方向Ｘにおいて第１軸受３０に対向する段部１８１と、段部１８１と第１軸受３０とによって軸方向Ｘから挟まれた弾性体４２と、ストッパ４４とを備える。ストッパ４４は、弾性体４２に隙間Ｐ３，Ｐ４を隔てて配置され、弾性体４２がウォームシャフト１８から受ける荷重が増加すると、ウォームシャフト１８の径方向Ｒにおける外側から弾性体４２に接触して径方向Ｒにおける外側への弾性体４２の変形を制限する。【選択図】図４
Dokumentinformationen
WORM REDUCTION GEAR AND ELECTRIC POWER STEERING DEVICE INCLUDING THE SAME
ウォーム減速機およびそれを備えた電動パワーステアリング装置
2016-01-12
Patent
Elektronische Ressource
Japanisch
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