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公开(公告)号：US20180017149A1
公开(公告)日：2018-01-18
申请号：US15646197
申请日：2017-07-11
Applicant: JTEKT CORPORATION
Inventor： Akihiro TAKEUCHI , Yu SUEMATSU , Yuji WAKUGAWA , Yoshitomo NAGAI , Koji OKUMURA , Hiroshi Kutsumi
CPC classification number: F16H55/22 , B29C45/0025 , B29C45/1459 , B29C2045/0027 , B29L2015/00 , B29L2031/7754 , B62D5/0454 , F16H2055/065
Abstract: A worm wheel includes: a sleeve; and a toothed portion provided by injection molding so as to cover a part of the sleeve, the toothed portion including a first thick portion provided on a first side face, which is a surface of the sleeve on a side closer to an injection-mold gate in an axial direction, and a second thick portion provided on a second side face, which is a surface on an opposite side to the first side face. A central part, in the axial direction, of the outer peripheral surface of the sleeve projects in the radial direction relative to both ends in the axial direction. The first thick portion of the toothed portion has a smaller thickness in the axial direction than the second thick portion.
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公开(公告)号：US20140102235A1
公开(公告)日：2014-04-17
申请号：US14046014
申请日：2013-10-04
Applicant: JTEKT CORPORATION
Inventor： Yuji WAKUGAWA , Ryuji NAKATA , Atsuhiro YOSHIDA , Wataru YAMADA , Jun HAMAKITA , Hideyuki HONKADO
CPC classification number: B62D3/04 , B62D5/0409 , F16H1/16 , F16H57/039 , F16H57/0464 , F16H57/0498 , Y10T74/19828
Abstract: A speed reducer for an electric power steering system includes a worm, a worm wheel, and a housing. Only a meshing section where the worm and the worm wheel mesh with each other and a space between the worm wheel and the housing are filled with grease. The grease in the space is in contact with both tooth surfaces of the worm wheel and an inner peripheral face of the housing, the inner peripheral face facing the worm wheel.
Abstract translation: 用于电动助力转向系统的减速器包括蜗杆，蜗轮和壳体。 只有蜗杆和蜗轮彼此啮合的啮合部分和蜗轮与壳体之间的空间被填满了油脂。 空间中的油脂与蜗轮的两个齿面和壳体的内周面接触，内周面与蜗轮相对。
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