公开(公告)号：US12155273B2

公开(公告)日：2024-11-26

申请号：US17362473

申请日：2021-06-29

Applicant: MAKITA CORPORATION ,  MINEBEA MITSUMI INC.

Inventor： Takaharu Nakatsuka ,  Yuta Izutsu ,  Kotaro Eguchi ,  Kui Li

IPC: B25B21/00 ,  B25B23/147 ,  H02K7/10 ,  H02K7/14 ,  H02K11/02 ,  H02K11/24 ,  H02K11/30

Abstract: A screwing machine includes a motor, an output shaft, a twist portion, a plate portion, a strain gauge, an amplification circuit. The output shaft is driven by the motor. To the output shaft, a bit is attachable. The twist portion is hollow. To the twist portion, torque applied to the output shaft is transmitted through a transmission element. The output shaft is configured to be indirectly twisted by the torque applied to the output shaft. The plate portion is integrally formed with the twist portion. The strain gauge is disposed on the twist portion. The amplification circuit is disposed on the plate portion. To the amplification circuit, a signal from the strain gauge is input.

公开(公告)号：US11060928B2

公开(公告)日：2021-07-13

申请号：US16956864

申请日：2018-12-26

Applicant: MINEBEA MITSUMI Inc.

Inventor： Kui Li ,  Kotaro Eguchi

IPC: G01L1/00 ,  G01L1/22 ,  H05K13/04

Abstract: Provided is a load sensor that may precisely detect a load of pressing force to an object. A load sensor to be used for a multiaxial actuator (10) that has a drive rod (12) that linearly moves in an axial direction in a state where the drive rod (12) is contained in a housing (11), and a suction rod (22) that is arranged in parallel with the drive rod (12), linearly moves at the same time as the drive rod (12) in the axial direction, and has a tip end portion (22a) to be pressed, when a chip is to be suctioned, against the chip, includes a coupling member (30) that couples the drive rod (12) and the suction rod (22), in which the coupling member (30) has a first coupling part (31) that couples the drive rod (12), and a second coupling part (32) that couples the suction rod (22) in an integrated state, and the first coupling part (31) has a strain body part (311) that is formed to be thinner than the second coupling part (32) and supports the drive rod (12), and strain gauges (41) to (44) attached to the strain body part (311).

公开(公告)号：US10955303B2

公开(公告)日：2021-03-23

申请号：US16956808

申请日：2018-12-26

Applicant: MINEBEA MITSUMI Inc.

Inventor： Kui Li ,  Kotaro Eguchi

IPC: G01L5/00 ,  H05K13/04

Abstract: Provided is a load sensor that can precisely detect a load of pressing force to an object. A load sensor to be used for a multiaxial actuator (10) that has a drive rod (12) that linearly moves in an axial direction in a state where the drive rod (12) is contained in a housing (11), and a suction rod (22) that is arranged in parallel with the drive rod (12), linearly moves at the same time as the drive rod (12) in the axial direction, and has a tip end portion (22a) to be pressed, when a chip is to be suctioned, against the chip, includes a coupling member (30) that couples the drive rod (12) and the suction rod (22), the coupling member (30) has a first coupling part (31) that couples the drive rod (12), and a second coupling part (32) that couples the suction rod (22), and a neck part (33) that is provided between the first coupling part (31) and the second coupling part (32) and formed to be thinner than the first coupling part (31) and the second coupling part (32), and the neck part (33) includes strain gauges (41) to (44) attached to a front surface of the neck part (33).

公开(公告)号：US10345163B2

公开(公告)日：2019-07-09

申请号：US15605191

申请日：2017-05-25

Applicant: AISIN SEIKI KABUSHIKI KAISHA ,  MINEBEA MITSUMI Inc.

Inventor： Naoya Iesato ,  Yasukuni Ojima ,  Dohaku Inamori ,  Kotaro Eguchi

IPC: G01L1/26 ,  G01L1/22 ,  G01L25/00 ,  G01L5/22

Abstract: A load detection apparatus includes a load input portion having a input surface, and an output surface; a flexure element including on annular portion including a contacting portion configured to make contact with at least a part of the output surface, and a support portion; a set of sensors disposed on a reverse surface opposite to a surface provided with the contacting portion in the annular portion, each of the set of sensors being configured to detect distortion corresponding to an input load; a set of calculation portions configured to calculate a set of magnitudes of the load by use of respective detection results obtained by the set of sensors; and an abnormality determination portion configured to determine whether the set of sensors and the set of calculation portions have no abnormality, by comparing the set of magnitudes of the load with each other.