公开(公告)号：US20220316533A1

公开(公告)日：2022-10-06

申请号：US17839162

申请日：2022-06-13

申请人： HITACHI ASTEMO, LTD.

发明人： Yasushi AKITA ,  Kazuhisa YOKOYAMA ,  Kenichiro ISHIKURA ,  Tatsuya SHIMODA

IPC分类号： F16D3/06 ,  F16C3/03 ,  F16D1/10

摘要： According to the present invention, a low surface-roughness part (114a) is formed at a first tapered part (114), and, as a result, the roughness of an opening-edge of a groove part (113a) of an internal spline part (113) that opens at the first tapered part (114) is reduced, and surface pressure applied by the opening edge to a tooth (123b) of an external spline part (123) can be reduced. As a result, the opening edge of the groove part (113a) of the internal spline part (113) can be kept from digging into the tooth (123b), and variation, between products, in the insertion load of a second shaft part (12) can be suppressed.

公开(公告)号：US20220196078A1

公开(公告)日：2022-06-23

申请号：US17692896

申请日：2022-03-11

申请人： HITACHI ASTEMO, LTD.

发明人： Yasushi AKITA ,  Hiromichi KOMAI ,  Masashi KUBO

IPC分类号： F16D1/10 ,  F16C3/02 ,  B60K17/22

摘要： A power transmission shaft has a shaft member having, on an outer peripheral surface thereof, a male spline; a cylindrical member having, on an inner peripheral surface thereof, a female spline; and a seal member provided in a pressed state between an outer peripheral seal surface formed on the outer peripheral surface of the shaft member and an inner peripheral seal surface formed on the inner peripheral surface of the cylindrical member. The cylindrical member is spline-engaged with the shaft member by one end side of the shaft member being inserted into the cylindrical member from an other end side of the cylindrical member. Axial direction shock is absorbed by sliding of the splines. The outer peripheral seal surface is positioned at the other end side with respect to the male spline, and the inner peripheral seal surface is positioned at the other side with respect to the female spline.

公开(公告)号：US20210372482A1

公开(公告)日：2021-12-02

申请号：US17291048

申请日：2019-10-30

申请人： Hitachi Astemo, Ltd.

发明人： Daiki TSUTSUMI ,  Yasushi AKITA ,  Kenichiro ISHIKURA

IPC分类号： F16D1/10 ,  F16D3/06 ,  F16C3/03

摘要： In a propeller shaft, a crowning portion of a male spline portion is provided in a predetermined range including a front end portion in an axial direction, and a tooth tip surface is shaped in such a manner that a tooth thickness thereof gradually increases from the front end portion toward an intermediate portion of the male spline portion in the axial direction.