公开(公告)号：US20160178036A1

公开(公告)日：2016-06-23

申请号：US14909283

申请日：2014-07-17

Applicant: NSK LTD.

Inventor： Masahiro KITA ,  Yasunori OISHI ,  Hiroki NISHII

IPC: F16H15/38 ,  F16H63/06

CPC classification number: F16H15/38 ,  F16H63/065

Abstract: A hydraulic pressing unit for pressing an input disc in an axial direction includes a first hydraulic pressure chamber and a second hydraulic pressure chamber, a primary piston facing the first hydraulic pressure chamber and a secondary piston facing the second hydraulic pressure chamber, and oil holes configured to supply oil into the first hydraulic pressure chamber are formed in an input shaft, while oil paths configured to supply oil into the second hydraulic pressure chamber are formed in the secondary piston. Consequently, a separate oil hole configured to supply oil into the second hydraulic pressure chamber is not formed in the input shaft. Thus, it is possible to mitigate the cost and labor hours involved in fabrication of the input shaft. Two oil holes spaced apart from each other in an axial direction do not exist in the input shaft.

Abstract translation: 用于沿轴向按压输入盘的液压按压单元包括第一液压室和第二液压室，面向第一液压室的主活塞和面向第二液压室的副活塞， 在输入轴上形成向第一液压室供给油的构造，在第二活塞中形成有用于将油供给到第二液压室的油路。 因此，在输入轴上不形成用于向第二液压室供给油的单独的油孔。 因此，可以减轻输入轴的制造所涉及的成本和劳动时间。 输入轴上不存在沿轴向间隔开的两个油孔。