公开(公告)号：US10935116B2

公开(公告)日：2021-03-02

申请号：US16468445

申请日：2018-01-05

Applicant: THK CO., LTD.

Inventor： Yuji Kubota ,  Futoshi Nakamura ,  Tetsuhiro Nishide ,  Kotaro Kawai ,  Bin Zhao ,  Tomoyuki Sugiyama

IPC: F16J15/3268 ,  F16H25/24 ,  F16H57/04 ,  F16H25/22

Abstract: A seal member for a ball screw device, which is fixed to an axial end surface of a nut member of the ball screw device and is configured to seal a gap between the nut member and the screw shaft, the seal member including: a plurality of base plates which each have a through hole having an inner diameter larger than an outer diameter of the screw shaft; a spacer plate, which is sandwiched between two base plates adjacent to each other, and has a seal accommodation hole having an inner diameter larger than an inner diameter of a through hole of the base plates; and a seal plate, which has a shaft-fitting hole corresponding to a sectional shape of the screw shaft in a direction perpendicular to an axial direction, and is arranged in the seal accommodation hole of the spacer plates.

公开(公告)号：US10060522B2

公开(公告)日：2018-08-28

申请号：US15324937

申请日：2015-07-07

Applicant: THK CO., LTD.

Inventor： Ryuji Furusawa ,  Shinji Aoki ,  Satoshi Kashiwagura ,  Bin Zhao ,  Ryunosuke Ozeki ,  Marie Horikawa

IPC: F16H1/24 ,  F16H57/04 ,  F16H25/22

CPC classification number: F16H57/0497 ,  F16H25/2204 ,  F16H25/24 ,  F16H57/0456

Abstract: Provided is a screw device nozzle that can gas-cool a screw device effectively. A screw device cooling nozzle (4) of the present invention is placed in such a manner as to surround at least one of a screw shaft (1) and a nut (2). The cooling nozzle (4) includes an internal passage (8) into which gas is introduced, an opening (7) for releasing the gas flow introduced into the internal passage (8), a deflection surface (27), provided adjacent to the opening (7), for bending the gas flow released from the opening (7), and a guide path (10) for drawing in gas outside the cooling nozzle (4).

公开(公告)号：US11480236B2

公开(公告)日：2022-10-25

申请号：US16960382

申请日：2018-12-07

Applicant: THK CO., LTD.

Inventor： Tomofumi Ohashi ,  Bin Zhao ,  Sho Iwashiro ,  Yoshihiro Kudo ,  Wataru Saito ,  Mika Oki ,  Takuya Miyazaki

IPC: F16H25/20 ,  F16H25/22

Abstract: The ball screw device includes: a screw shaft having an N number (N is an integer equal to or larger than 2) of rolling grooves having the same lead; balls configured to roll in the rolling grooves; and a nut member, which is assembled to the screw shaft through intermediation of the balls, and includes one or a plurality of endless circulation paths configured to circulate the balls around the screw shaft. Each of the endless circulation paths of the nut member includes: an N number of load portions, which are configured to allow the balls to roll thereon while bearing a load, and correspond to the N number of rolling grooves, respectively; and an N number of no-load portions, which each couple adjacent ones of the load portions, and are configured to allow the balls to move between the N number of rolling grooves.

公开(公告)号：US20170211687A1

公开(公告)日：2017-07-27

申请号：US15324937

申请日：2015-07-07

Applicant: THK CO., LTD.

Inventor： Ryuji Furusawa ,  Shinji Aoki ,  Satoshi Kashiwagura ,  Bin Zhao ,  Ryunosuke Ozeki ,  Marie Horikawa

IPC: F16H57/04 ,  F16H25/22

CPC classification number: F16H57/0497 ,  F16H25/2204 ,  F16H25/24 ,  F16H57/0456

Abstract: Provided is a screw device nozzle that can gas-cool a screw device effectively. A screw device cooling nozzle (4) of the present invention is placed in such a manner as to surround at least one of a screw shaft (1) and a nut (2). The cooling nozzle (4) includes an internal passage (8) into which gas is introduced, an opening (7) for releasing the gas flow introduced into the internal passage (8), a deflection surface (27), provided adjacent to the opening (7), for bending the gas flow released from the opening (7), and a guide path (10) for drawing in gas outside the cooling nozzle (4).