公开(公告)号：US11002311B2

公开(公告)日：2021-05-11

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: B60G15/06 ,  F16C19/46 ,  G01G19/10 ,  F16F9/32

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.

公开(公告)号：US11472250B2

公开(公告)日：2022-10-18

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.