公开(公告)号：JPS60176806A

公开(公告)日：1985-09-10

申请号：JP3294084

申请日：1984-02-23

Applicant: BRIDGESTONE CORP

Inventor： HARA ITONOSUKE ,  FUKUYAMA HIROSHI ,  MATSUMURA YASUHIRO ,  SATOU NAOMI ,  NAKAO MAKOTO ,  WATANABE ISAO ,  NAKAO TSUTOMU

IPC: B60G17/00 ,  B60G17/015 ,  B60G17/04 ,  F16F9/084

Abstract: PURPOSE:To reliably discharge a drain without changing the fitting position of a discharge valve even if the car height is changed by directing the inversion section of a cylindrical body upward in a protruded shape and providing a drain discharge valve between the lower end of an outer cylinder section and an axle. CONSTITUTION:A car height adjustment unit 14 is arranged between an axle and a car body 12, and a fixed, closed hydraulic chamber 24 is provided in the cylinder 16 of the unit 14. An inversion section 42 is provided on the longitudinal, middle point of a flexible, cylindrical body 38; an inner cylinder section 40 and an outer cylinder section 44 are coaxially arranged; the tip of the outer cylinder section 44 is fixed to a drain pan 50; and a drain discharge valve 64 is provided on the drain pan 50. Accordingly, when the car body 12 is moved up and down, a car height detector 62 detects it, the pressure in a pressure air chamber 52 is increased or decreased to adjust the height automatically. The drain generated in the chamber 52 is discharged outside via a through hole when the chamber 52 is communicated to the outside.

公开(公告)号：JPS60241538A

公开(公告)日：1985-11-30

申请号：JP9779584

申请日：1984-05-16

Applicant: BRIDGESTONE CORP

Inventor： WATANABE ISAO ,  SATOU NAOMI ,  NAKAO MAKOTO ,  NAKAO TSUTOMU

IPC: B60G11/26 ,  B60G11/30 ,  B60G17/015 ,  B60G17/04 ,  B60G17/048 ,  F16F9/00 ,  F16F9/08

Abstract: PURPOSE:To prevent the variation of the supporting height when spring constant is switched, by making zero the pressure difference between main and sub air chambers by permitting the both chambers to communicate through a pin hole. CONSTITUTION:An air chamber 34 is formed from a lower cylinder body 20, upper cylinder body 24, and an elastic cylinder body 18. Said air chamber 34 is divided into main air chamber 34A and a sub air chamber 34B by a cylindrical wall 36. A communication hole 40 and a pin hole 38 are formed onto he cylindrical wall 36. The spring constant of the air chamber is switched by opening and closing the communication hole 40 by an opening and closing means 42. The both air chambers 34A and 34B always communicate through the pin hole 38, preventing the generation of a large pressure difference.