公开(公告)号：US20150276047A1

公开(公告)日：2015-10-01

申请号：US14550488

申请日：2014-11-21

Applicant: SHOWA CORPORATION

Inventor： Tsutomu KIMIJIMA ,  Makoto WATANABE ,  Tatsuya SAITO

IPC: F16H57/12 ,  F16H1/16

CPC classification number: F16H57/12 ,  F16H1/16 ,  F16H2057/127 ,  Y10T74/19623

Abstract: A worm biasing structure biasing a worm engaged with a worm wheel includes a radial bearing and an elastic body. The radial bearing supports the worm in a radial direction. The elastic body has elasticity and biases the radial bearing toward the worm wheel in a biasing direction. The elastic body includes a low-spring rate elastic body and a high-spring rate elastic body having a higher spring rate than that of the low-spring rate elastic body in series in the biasing direction.

Abstract translation: 偏置与蜗轮啮合的蜗杆的蜗杆偏压结构包括径向轴承和弹性体。 径向轴承在径向方向上支撑蜗杆。 弹性体具有弹性，并且偏压径向轴承朝向蜗轮的偏置方向。 弹性体包括弹簧弹簧比弹簧弹簧比弹簧弹簧高的弹簧弹簧弹簧体，弹簧弹簧弹簧体的弹簧比弹性高于弹簧弹簧体在偏置方向上串联的弹性。

公开(公告)号：US20160025209A1

公开(公告)日：2016-01-28

申请号：US14575738

申请日：2014-12-18

Applicant: Showa Corporation

Inventor： Yuusuke ANMA ,  Masaru ISHIWATA ,  Makoto WATANABE

IPC: F16H57/12 ,  B62D5/04 ,  F16H57/022

CPC classification number: F16H57/12 ,  B62D5/0409 ,  F16H57/022 ,  F16H2057/02082 ,  F16H2057/127

Abstract: A worm biasing structure that biases a worm toward a worm wheel in a biasing direction, includes: a radial bearing that supports the worm in a radial direction; a bearing holder that has a holder hole for accommodating the radial bearing; a biasing member for biasing the radial bearing toward the worm wheel; and a housing that has a housing hole for accommodating the bearing holder, a pair of guide surfaces is formed as defined herein, when the bearing holder is accommodated in the housing hole and the radial bearing is not accommodated in the bearing holder, a distance between the pair of guide surfaces is smaller than or equal to an outer diameter of the radial bearing, and a gap is formed between an outer surface on the outer side of the guide surface and the housing hole.

Abstract translation: 一种将偏压方向的蜗杆向蜗轮偏置的蜗杆偏压结构，包括：沿径向支撑蜗杆的径向轴承; 轴承座，其具有用于容纳径向轴承的保持孔; 偏压构件，用于朝向蜗轮偏压径向轴承; 以及壳体，其具有用于容纳轴承座的容纳孔，当轴承保持架容纳在轴承座中并且径向轴承未被容纳在轴承座中时，形成如下所述的一对导向面， 所述一对导向面小于或等于所述径向轴承的外径，并且在所述引导面的外侧的外表面与所述容纳孔之间形成间隙。