公开(公告)号：US20180313438A1

公开(公告)日：2018-11-01

申请号：US15527928

申请日：2015-11-04

Applicant: NTN CORPORATION

Inventor： Tatsuya YAMASAKI ,  Masaaki EGUCHI

IPC: F16H25/22 ,  F16D65/18 ,  B60T13/74 ,  F16D55/226 ,  H02K7/06

Abstract: An electric linear motion actuator is provided which includes an outer ring member, a rotary shaft, planetary rollers, and a carrier including a disk, and in which the outer ring member is formed with a helical rib, each of the planetary rollers being formed with circumferential grooves in which the helical rib is engaged. When the rotary shaft rotates, the planetary rollers rotate about their axes while revolving around the rotary shaft so that the outer ring member axially linearly moves. The actuator includes thrust roller and retainer assemblies each mounted between one of the planetary roller and the disk of the carrier, and each guided by a raceway, i.e., an end surface of the corresponding planetary roller. The actuator includes a common raceway disk common to all of the thrust roller and retainer assemblies, and mounted between the thrust roller and retainer assemblies and the disk of the carrier.

公开(公告)号：US20150316112A1

公开(公告)日：2015-11-05

申请号：US14423440

申请日：2013-08-27

Applicant: NTN CORPORATION

Inventor： Tatsuya YAMASAKI

IPC: F16D65/18 ,  F16H25/22

CPC classification number: F16D65/14 ,  F16D65/18 ,  F16D2121/24 ,  F16D2125/40 ,  F16D2125/48 ,  F16D2125/50 ,  F16H25/2252 ,  F16H2025/2075 ,  F16H2025/2081 ,  F16H2025/2276 ,  Y10T74/18576

Abstract: An electric linear motion actuator includes an outer ring member provided around a central shaft, and a plurality of planetary rollers disposed between the central shaft and the outer ring member. One of the central shaft and the outer ring member serves as an input member which is rotatable and immovable in the axial direction and rotated by an electric motor, while the other serves as an output member which is rotationally stationary and movable in the axial direction. The input member has a peripheral surface formed with a plurality of annular ribs which are equal in pitch. Each planetary roller has a radially outer surface formed with annular grooves which are equal in pitch to the annular ribs and in which the annular ribs are engaged. The output member has a peripheral surface formed with a helical rib which is equal in pitch to the annular grooves of the planetary rollers.

Abstract translation: 电动直线运动致动器包括围绕中心轴设置的外圈构件和设置在中心轴和外圈构件之间的多个行星辊。 中心轴和外圈构件中的一个用作输入构件，其可以在轴向方向上旋转并且不可移动并且通过电动机旋转，而另一个作为输出构件，其可旋转地固定并可沿轴向移动。 输入构件具有形成有多个间距相等的多个环形肋的周边表面。 每个行星辊具有形成有环形槽的径向外表面，该环形凹槽与环形肋相等，并且其中环形肋接合。 输出构件具有形成有与行星辊的环形槽相等的螺旋肋的周边表面。