Title:
BUMP STOPPER OF HYDRAULIC PRESSURE BUMPER
Document Type and Number:
Japanese Patent JP3679223
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To improve rigidity of an outer peripheral edge part of a sheet wall by embossing and molding a ring projected part projected to the upper surface side on the outer peripheral edge part of the sheet wall of a bump stopper with which a bumper rubber installed on a piston rod makes contact at the time when the piston rod of a hydraulic pressure dumper is displaced to the maximum in the contracting direction.
SOLUTION: An outer cylinder of a hydraulic pressure bumper is furnished with a rod guide 19 to guide sliding of a piston rod 7 on an upper end part and an oil seal 20 to close a sliding clearance of the piston rod 7 fitted and installed on it, and an upper end surface of the outer cylinder is covered with a bump stopper 21 with which a lower end of a bumper rubber 15 makes contact at the time when the piston rod 7 is moved and contracted to the maximum. This bump stopper 21 is formed of a circular sheet wall 23 with an upper surface of which the bumper rubber 15 makes contact and a cylindrical wall 24 extending in the roughly orthogonal direction from its outer periphery, but in this case, rigidity of the sheet wall 23 is improved by embossing and molding a ring projected part 25 on an inner and outer peripheral edge part of the sheet wall 23 so as to project it to the upper surface side.
Inventors:
Seiji Iwasawa
Fukasawa Wataru
Fukasawa Wataru
Application Number:
JP11215597A
Publication Date:
August 03, 2005
Filing Date:
April 30, 1997
Export Citation:
Assignee:
株式会社日立製作所
International Classes:
B60G7/04; B60G15/06; F16F9/58; (IPC1-7): F16F9/58; B60G7/04; B60G15/06
Domestic Patent References:
| JP58020739U | ||||
| JP2121647U | ||||
| JP8170682A | ||||
| JP2140048U |
Attorney, Agent or Firm:
Tsuyoshi Hashimoto
Hiromichi Kobayashi
Tomioka Kiyoshi
Hiromichi Kobayashi
Tomioka Kiyoshi