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:
Nov. 16, 2010
Filed:
Apr. 05, 2004
Akiyasu Nozue, Ushiku, JP;
Nozomu Tanaka, Tsuchiura, JP;
Hiroyuki Isobe, Tsuchiura, JP;
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Abstract
A swing mechanism for a construction machine is provided with a center framehaving a pinion insertion hole, an inner race having an internal gear and mounted on a side of an undercarriage, an outer racerotatably arranged surrounding the inner race and provided with the center frame secured thereon by bolts, a pinion maintained in meshing engagement with the internal gear of the inner race, and a pinion drive device. A pin fit-in holearranged in the center framesuch that a knock pinfixed on the outer raceis fitted in the pin fit-in hole to position the center frame. To arrange the pin fit-in holein the center frame, a pin fit-in hole portionthrough which the pin fit-in holeis formed is locally arranged such that the pin fit-in hole portionextends toward the pinion insertion holeto have a center of the pin fit-in holelocated on a center connection line S. This construction allows to perform smooth assembly of the pinion drive device while enabling to optimally arrange the knock pin for positioning the center frame.