To provide a worm speed reducer which achieves low noise.SOLUTION: A worm speed reducer 150 includes: a bearing 161 which holds a worm shaft 164 at the inner side of a housing 153; a coil spring 170 which applies a biasing force toward a worm wheel 163; and a buffer member 180 which is disposed so as to cover a part of an outer peripheral surface of the bearing 161 in a gap between the bearing 161 and the housing 153. The buffer member 180 includes: an insertion part 182 which forms a space into which the coil spring 170 is inserted; and a first engagement part 181 which engages with the housing 153 so that radial deflection of the insertion part 182 is restricted. The housing 153 includes a second engagement part 157 which engages with the first engagement part 151.SELECTED DRAWING: Figure 5
【課題】低騒音のウォーム減速機の提供。【解決手段】ハウジング153の内側においてウォームシャフト164を保持する軸受161と、ウォームホイール163に向かう付勢力を与えるコイルバネ170と、軸受161とハウジング153との隙間において軸受161の外周面の一部を覆うように配置される緩衝部材180と、を備え、緩衝部材180は、コイルバネ170が挿入される空間を形成する挿通部182と、挿通部182の径方向の撓みが規制されるようにハウジング153と係合する第一係合部181と、を備え、ハウジング153は、第一係合部151と係合する第二係合部157を備える、ウォーム減速機150。【選択図】図5
WORM SPEED REDUCER
ウォーム減速機
2021-06-24
Patent
Electronic Resource
Japanese