BALL SCREW DEVICE AND METHOD FOR MANUFACTURING SAME

    公开(公告)号:US20240352993A1

    公开(公告)日:2024-10-24

    申请号:US18682598

    申请日:2023-05-11

    申请人: NSK LTD.

    IPC分类号: F16H25/20 F16D1/10 F16H25/24

    摘要: A fitting shaft portion has an inner-diameter side engaging portion on an outer peripheral surface with external teeth arranged in a circumferential direction; a fitting member has an outer-diameter side engaging portion on an inner peripheral surface with internal teeth arranged in the circumferential direction and engaging with the inner-diameter side engaging portion; an engaging portion between the inner-diameter side engaging portion and the outer-diameter side engaging portion includes a portion having interference in the radial direction in a portion in the axial direction; and the fitting shaft portion has a crimped portion at an end portion on one side in the axial direction that engages in the axial direction with the fitting member.

    LINEAR ACTUATOR
    4.
    发明公开
    LINEAR ACTUATOR 审中-公开

    公开(公告)号:US20240271683A1

    公开(公告)日:2024-08-15

    申请号:US18568604

    申请日:2022-06-28

    申请人: ADVICS CO., LTD.

    IPC分类号: F16H25/24 F16H25/20

    摘要: A linear actuator includes an electric motor and a linear motion conversion mechanism. The linear motion conversion mechanism includes a screw shaft and a nut screwed into the screw shaft, and is configured such that the nut moves linearly according to a rotation of the screw shaft. The screw shaft is provided with a hole coaxial with an axis of rotation in this linear actuator. Then, the electric motor and the linear motion conversion mechanism are axially aligned by inserting the distal end portion of the motor shaft, which is coaxial with the rotor of the electric motor and rotates integrally, into the hole.

    Linear mechanical screw transmission

    公开(公告)号:US11976711B2

    公开(公告)日:2024-05-07

    申请号:US17762875

    申请日:2020-09-22

    申请人: UMBRAGROUP S.P.A.

    IPC分类号: F16H25/22 B64C13/28 F16H25/20

    摘要: Described is a mechanical transmission (T) comprising a containment structure (1) housing a roto-translational element (2), extending along an axis of rotation (X) and comprising a first and a second threaded portion (3, 4), a rotary element (5) connected or connectable to a drive unit to define a mechanical power input unit and equipped with a first thread (8) designed to engage rotatably with the first threaded portion (3) to the roto-translational element in such a way as to define a first threaded connection, a fixed guide (9) having a second thread (14) designed to engage with the second threaded portion (4) of the roto-translational element (2) in such a way as to define a second threaded connection, and a translating element (10), translating along the axis (X) and defining a power output unit. The translating element (10) is connected to the roto-translational element (2) for translating at the same linear speed as the roto-translational element (2). The roto-translational element (2) is thus simultaneously coupled to the rotary element (5) and to the fixed guide (9) respectively by means of the first and second threaded connections. These connections have different pitches in such a way as to vary the angular speed between the roto-translational element (2) and the rotary element (5).

    COUPLING MECHANISM
    7.
    发明公开
    COUPLING MECHANISM 审中-公开

    公开(公告)号:US20230415313A1

    公开(公告)日:2023-12-28

    申请号:US18037662

    申请日:2021-11-12

    发明人: Maximilian KNYRIM

    IPC分类号: B25B27/10 F16H25/20

    摘要: Power tool, in particular a pipe press, including a drive, a transmission device, a threaded spindle drive and a linear actuator, wherein a torque generated by the drive is transmissible via the transmission device and the threaded spindle drive to the linear actuator. The power tool includes a coupling device having a sleeve and a piston for converting a rotational movement generated by the transmission device into a linear movement, to be transmitted to the threaded spindle drive, from the transmission device to the threaded spindle drive, wherein a toothed profile for connecting the piston to the sleeve for conjoint rotation therewith is contained between the sleeve and the piston, with the result that the piston is arranged in a manner which allows it to move axially relative to the sleeve and to rotate with the threaded spindle drive.

    Linear actuator
    9.
    发明授权

    公开(公告)号:US11821496B2

    公开(公告)日:2023-11-21

    申请号:US16762075

    申请日:2018-11-12

    申请人: LINAK A/S

    发明人: Rupert Jensch

    摘要: A linear actuator (1) comprising an electric motor (20), a transmission (40), a spindle (80) being connected to the transmission (40), a spindle nut (81) being arranged on the spindle (80), a housing (10), an outer tube (3) being connected to the housing (10), and an inner tube (2) being connected to the spindle nut (81). The spindle nut (81) and the inner tube (2) are guided inside the outer tube (3). The transmission (40) including a transmission housing (41), a transmission input end and a transmission output end positioned opposite the transmission input end. A coupling (30) including a first coupling part (32) being connected to the output end of the transmission, a second coupling part (34) being connected to the end of the spindle and a coupling member (36) disposed between the first and second coupling parts (32, 34) and slidably engaged with the first and second coupling parts (32, 34).

    Motorized dropper post assembly
    10.
    发明授权

    公开(公告)号:US11661130B2

    公开(公告)日:2023-05-30

    申请号:US16862695

    申请日:2020-04-30

    发明人: Jon Quenzer

    IPC分类号: B62J1/08 F16H25/20

    摘要: A dropper post assembly includes a lower tube and an upper tube slidably mounted to the lower tube. The assembly includes a motor with a motor shaft that rotates bi-directionally. The assembly also includes a lead screw that is directly or indirectly mounted to the motor shaft such that the lead screw rotates in unison with the motor shaft. The assembly also includes a lead screw nut threaded onto the lead screw and mounted within the upper tube such that the lead screw nut is unable to rotate relative to the upper tube. The assembly further includes a lead screw sheath configured to receive at least a portion of the lead screw that extends past an upper end of the lead screw nut.