公开(公告)号：US20190285461A1

公开(公告)日：2019-09-19

申请号：US16318797

申请日：2017-07-18

Applicant: NSK LTD.

Inventor： Masafumi HIKIDA ,  Eisaku SUZUKI ,  Shunsuke SUZUKI ,  Yasuyuki MATSUDA

IPC: G01G19/10 ,  G01L1/02 ,  G01G19/52 ,  G01G5/04

Abstract: A weight measuring device includes: a bottom plate (200) in contact with an arm of a suspension; a piston (300) capable of pressing a diaphragm (230) forming an oil chamber (201) on an upper surface side of the bottom plate; a pressure sensor (400) for detecting a pressure of measurement fluid (R) in the oil chamber on a lower surface side of the bottom plate; an oil discharge hole portion (240) which communicates an inner side of the oil chamber with the atmosphere side and is capable of discharging excess hydraulic oil in the oil chamber; and a sealing portion (242) which is provided in the oil discharge hole portion and seals the oil discharge hole portion after discharging the excess measurement fluid (R) and equilibrating an internal pressure to the atmospheric pressure in a state of no load.

公开(公告)号：US20220266646A1

公开(公告)日：2022-08-25

申请号：US17636515

申请日：2021-01-25

Applicant: NSK LTD.

Inventor： Shin YAMAMOTO ,  Takahiro SUSHI ,  Cyou KYO ,  Mitsuru OIKE ,  Shunsuke SUZUKI

IPC: B60G17/015 ,  B60G15/04

Abstract: A suspension device has an upper shell having a stepped section around an inner circumferential surface; a lower shell; a ball screw shaft rotatably supported by the upper shell; a bearing unit arranged between a part of the ball screw shaft and the upper shell, and having an outer side part in a radial direction including a side surface that comes in contact with a side surface on the other side in the axial direction of the stepped section; a ball nut screwed on the ball screw shaft; an inner tube joined to the lower shell and the ball nut; an electric motor; and a coil spring, and a circumscribed circle diameter of the ball nut and the inner tube is less than an inner diameter dimension of the stepped section.

公开(公告)号：US20200378438A1

公开(公告)日：2020-12-03

申请号：US16623193

申请日：2017-12-15

Applicant: NSK LTD.

Inventor： Ryuho MORITA ,  Yasuyuki MATSUDA ,  Masafumi HIKIDA ,  Eisaku SUZUKI ,  Shunsuke SUZUKI ,  Yoshiya MUKAI

IPC: F16C19/46 ,  F16C33/80

Abstract: A vehicle weight measurement device includes a diaphragm which covers an opening area of a groove portion of a mounting part to form an oil chamber of a predetermined space together with the groove portion; a pressure sensor which detects a change in pressure of measurement fluid in the oil chamber; a first piston which presses the diaphragm; a second piston which presses the first piston; and a bearing unit interposed between the second piston and a spring bush which receives one end of a spring of a suspension device and is relatively rotatable. The bearing unit includes a thrust needle bearing which swingably supports a load in a longitudinal direction of the suspension device, and a slide bush which does not receive a load in the longitudinal direction and receives a load in a radial direction while causing constant damping to swinging.