The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 16, 2022
Filed:
Apr. 23, 2018
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Yusuke Suzuki, Tsuchiura, JP;
Hiroshi Sakamoto, Hitachi, JP;
Mariko Mizuochi, Hitachinaka, JP;
Hiroaki Tanaka, Kasumigaura, JP;
HITACHI CONSTRUCTION MACHINERY CO., LTD., Tokyo, JP;
Abstract
Provided is a work machine that, within the limit of not harming dynamic stability, can perform work utilizing the impact generated when a cylinder driving a front work implement collides with a stroke end. A drive control systemincludes: a stroke end distance calculation and evaluation sectionthat determines whether or not it is possible for cylindersA andA to collide with a stroke end; a dynamic center of gravity position prediction sectionthat, when the stroke end distance calculation and evaluation section determines that it is possible for the cylinders to collided on the stroke end, predicts a trajectory of the dynamic center of gravity position of a hydraulic excavatorfrom a time when a decelerating operation of the cylinder starts to a time when the cylinder stops; and an allowable velocity changing sectionthat changes the allowable velocity of the cylinder according to a minimum distance from the trajectory of the dynamic center of gravity position predicted by the dynamic center of gravity position prediction section to a tipping line of the hydraulic excavator.