公开(公告)号：US11788581B2

公开(公告)日：2023-10-17

申请号：US17419950

申请日：2020-04-27

Applicant: HARMONIC DRIVE SYSTEMS INC.

Inventor： Yuki Kato ,  Douglas Olson ,  Brian Coyne

IPC: F16C41/00 ,  F16C33/58 ,  F16C33/60 ,  F16H1/32 ,  F16H49/00

CPC classification number: F16C41/007 ,  F16C33/581 ,  F16C33/60 ,  F16H1/32 ,  F16H49/001 ,  F16C2361/61 ,  F16C2361/65 ,  F16C2380/27

Abstract: A bearing unit is provided with a strain element for torque detection. The strain element is provided with a first annular part attached to a rotation-side member, a second annular part attached to a load-side member, and a plurality of ribs serving as strained parts linking the first annular part and the second annular part together. One of an inner race and an outer race is integrally formed on the first annular part of the strain element. Deformation, which occurs in the ribs of the strain element due to torque exerted on the rotation-side member from the load-side member, is detected by a strain gauge, etc., and converted to torque. The strain element for torque detection can be incorporated into a motor, a reducer, or another rotary propulsion unit without the need for a dedicated installation space and without the need for fastening fittings, etc.

公开(公告)号：US12203746B2

公开(公告)日：2025-01-21

申请号：US17758245

申请日：2020-04-24

Applicant: HARMONIC DRIVE SYSTEMS INC.

Inventor： Shintaro Ueno ,  Yuki Kato ,  Yoshinori Shibahara

IPC: H05K1/14 ,  G01B7/30 ,  G01B11/26 ,  G01D5/14 ,  G01P3/36 ,  G01P3/481 ,  H02K11/215

Abstract: A rotary encoder is incorporated in an annular space formed between a hollow rotating shaft and an encoder case. The rotary encoder has an annular printed wiring substrate, a plurality of mounting substrates that are outward from the printed wiring substrate in the radial direction and are arranged in the circumferential direction, and inter-substrate wiring cables bridged between the printed wiring substrate and each of the mounting substrates in the radial direction. Power supply to the mounting substrates and signal transmission and reception between the mounting substrates can be accomplished without routing around the wiring cables. It is possible to achieve a rotary encoder that is suitable for being incorporated in a narrow annular space.