Linear actuator and manufacturing method

    公开(公告)号:US12044295B2

    公开(公告)日:2024-07-23

    申请号:US18151806

    申请日:2023-01-09

    申请人: Ewellix AB

    发明人: Arnaud Groll

    IPC分类号: F16H25/20 F16H25/22

    CPC分类号: F16H25/2252

    摘要: A linear actuator includes a roller screw nut, a roller screw shaft and a plurality of planetary rollers forming an inverted roller screw mechanism. A bearing supports a rotating part of the linear actuator. The bearing includes a mounting member and a plurality of bearing rollers engaging a first bearing portion of the mounting member and a second bearing portion of the rotating part. The plurality of bearing rollers is axially fixed relative to the rotating part and the mounting member. A manufacturing method for the linear actuator is also provided.

    EXTENSION/CONTRACTION MECHANISM
    17.
    发明公开

    公开(公告)号:US20240191787A1

    公开(公告)日:2024-06-13

    申请号:US18502080

    申请日:2023-11-06

    发明人: Yoshitaka HADA

    IPC分类号: F16H25/20 F16B7/10

    摘要: To provide an extension/contraction mechanism that can lessen increase stress imposed on belts. An extension/contraction mechanism according to the present disclosure includes a telescopic extension/contraction part, in which the extension/contraction mechanism includes a first drive source connected to a screw shaft in such a way that it can transmit a drive force, a first belt holder that accommodates a second belt in such a way that the second belt can be sent out to the screw shaft or the second belt can be wound-up from the screw shaft, a second belt holder that accommodates a first belt in such a way that the first belt can be wound-up from the screw shaft, and a first belt holder drive part and a second belt holder drive part. The first and second belt holder drive parts rotate the first and second belt holders independently of the rotation of the screw shaft, respectively.

    LINEAR ACTUATOR
    18.
    发明公开
    LINEAR ACTUATOR 审中-公开

    公开(公告)号:US20240183433A1

    公开(公告)日:2024-06-06

    申请号:US18527726

    申请日:2023-12-04

    发明人: Dario Molinelli

    IPC分类号: F16H25/20 F16H25/24

    摘要: A linear actuator arranged to convert rotary motion to linear motion. The linear actuator includes a linear shaft arrangement, having a first shaft portion and a second shaft portion and extends along a longitudinal axis (A) of the linear actuator. At least one of the first shaft portion and the second shaft portion of the linear shaft arrangement can be translated linearly along the longitudinal axis upon actuation. A first drive system has a first rotary component extending at least partially around the longitudinal axis. A second drive system has a second rotary component extending at least partially around the longitudinal axis at a different axial position to the first drive system. The linear actuator, when the first drive system fails, allows rotation of the second rotary component so that the second shaft portion moves relative to the first shaft portion.

    TABLE DEVICE
    20.
    发明公开
    TABLE DEVICE 审中-公开

    公开(公告)号:US20240167546A1

    公开(公告)日:2024-05-23

    申请号:US18284167

    申请日:2022-03-04

    申请人: NSK LTD.

    发明人: Kenichiro WADA

    IPC分类号: F16H25/22 F16H25/20

    摘要: A table device includes a ball screw including a male screw member extending in an axial direction and a female screw member meshing with the male screw member and movable in the axial direction according to rotation of the male screw member, a slide device that movably supports the female screw member, and a fixing member to which the slide device is fixed. The fixing member includes a first wall section extending in a first direction and a second wall section extending in a second direction crossing the first direction in a cross section including an axis of the male screw member.