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:
Dec. 05, 1995
Filed:
May. 10, 1994
Industrial Technology Research Institute, Hsinchu, TW;
Abstract
A main shaft locating mechanism for change of tool, comprising a locating seat disposed with an eccentric, and a splined shaft disposed with a disk having an eccentric locating pin corresponding to the eccentric hole of the locating seat and adapted to axially fit thereinto. The disk and eccentric locating pin are formed with several orifices from which high pressure gas is injected, forming a gas pad between the eccentric locating pin and the locating seat to greatly reduce friction therebetween before the eccentric locating pin is fitted with the locating seat, whereby the main shaft stops rotating before the the tool is loosened. After the main shaft is stopped and located and the tool is loosened, the direction of the high pressure gas is changed to blow into the mandrel so as to clear up cutting chips accumulated therein for facilitating next tool-changing operation.