公开(公告)号：US20230184291A1

公开(公告)日：2023-06-15

申请号：US17925496

申请日：2021-03-23

Applicant: THK CO., LTD.

Inventor： Takuma Tsunoda ,  Kentaro Hikomoto ,  Hiroyuki Kishi

IPC: F16C29/06 ,  F16C19/50

CPC classification number: F16C29/0695 ,  F16C19/50

Abstract: A motion guide apparatus is provided which can prevent a ball from contacting an edge of a ball rolling groove of a track member when the ball transfers from a rolling surface of the inner peripheral side of a turn-around path (an inner peripheral-side component) to the track member. The motion guide apparatus includes: a track member (2) including a ball rolling groove (2a); and a moving member assembled to the track member (2) in such a manner as to be movable relative to the track member (2). The moving member includes: a moving member body having a loaded ball rolling groove facing the ball rolling groove (2a), and a return path substantially parallel to the loaded ball rolling groove; and a lid member having a turn-around path. In cross section of the motion guide apparatus perpendicular to a length direction of the track member (2), letting the radius of curvature of the ball rolling groove (2a) be R, and letting the distance from a ball center (O) to a rolling surface (21) of the inner peripheral side of the turn-around path (an inner peripheral-side component (9a)) be r, R>r is set.

公开(公告)号：US20200332833A1

公开(公告)日：2020-10-22

申请号：US16643055

申请日：2018-08-14

Applicant: THK CO., LTD.

Inventor： Hiroyuki Kishi ,  Mitsumasa Wada ,  Hiroyoshi Yasutake ,  Eriko Oshima ,  Shinji Aoki ,  Takuma Tsunoda

IPC: F16C29/06

Abstract: A motion guide device includes: a track member including a rolling member rolling surface; a movable member including a loaded rolling member rolling surface, and a rolling member return passage; a pair of cap members including a direction change passage connecting the loaded rolling member rolling surface and the rolling member return passage; and a plurality of rolling members arrayed in a rollable manner on a loaded rolling member rolling passage, the rolling member return passage, and a pair of the direction change passages, the loaded rolling member rolling passage being made up of the rolling member rolling surface and the loaded rolling member rolling surface. A gap between the rolling member and the direction change passage at a boundary portion X is formed so as to become smaller than a gap between the rolling member and the rolling member rolling surface at the boundary portion.

公开(公告)号：US12031576B2

公开(公告)日：2024-07-09

申请号：US17925496

申请日：2021-03-23

Applicant: THK CO., LTD.

Inventor： Takuma Tsunoda ,  Kentaro Hikomoto ,  Hiroyuki Kishi

IPC: F16C29/06 ,  F16C19/50

CPC classification number: F16C29/0609 ,  F16C29/0611 ,  F16C29/0654 ,  F16C19/50 ,  F16C29/0695 ,  F16C2240/40

Abstract: A motion guide apparatus is provided which can prevent a ball from contacting an edge of a ball rolling groove of a track member when the ball transfers from a rolling surface of the inner peripheral side of a turn-around path (an inner peripheral-side component) to the track member. The motion guide apparatus includes: a track member (2) including a ball rolling groove (2a); and a moving member assembled to the track member (2) in such a manner as to be movable relative to the track member (2). The moving member includes: a moving member body having a loaded ball rolling groove facing the ball rolling groove (2a), and a return path substantially parallel to the loaded ball rolling groove; and a lid member having a turn-around path. In cross section of the motion guide apparatus perpendicular to a length direction of the track member (2), letting the radius of curvature of the ball rolling groove (2a) be R, and letting the distance from a ball center (O) to a rolling surface (21) of the inner peripheral side of the turn-around path (an inner peripheral-side component (9a)) be r, R>r is set.

公开(公告)号：US11199222B2

公开(公告)日：2021-12-14

申请号：US16643055

申请日：2018-08-14

Applicant: THK CO., LTD.

Inventor： Hiroyuki Kishi ,  Mitsumasa Wada ,  Hiroyoshi Yasutake ,  Eriko Oshima ,  Shinji Aoki ,  Takuma Tsunoda

IPC: F16C29/06

Abstract: A motion guide device includes: a track member including a rolling member rolling surface; a movable member including a loaded rolling member rolling surface, and a rolling member return passage; a pair of cap members including a direction change passage connecting the loaded rolling member rolling surface and the rolling member return passage; and a plurality of rolling members arrayed in a rollable manner on a loaded rolling member rolling passage, the rolling member return passage, and a pair of the direction change passages, the loaded rolling member rolling passage being made up of the rolling member rolling surface and the loaded rolling member rolling surface. A gap between the rolling member and the direction change passage at a boundary portion X is formed so as to become smaller than a gap between the rolling member and the rolling member rolling surface at the boundary portion.