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.