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:
Feb. 25, 2014
Filed:
Jul. 01, 2008
Yoshinori Tatsuda, Kanazawa, JP;
Yoshinori Tatsuda, Kanazawa, JP;
Tsudakoma Kogyo Kabushiki Kaisha, Kanazawa-shi, JP;
Abstract
In a spindle head for a machine tool in which a spindle () to which a tool is mounted is rotated around an axial line of a support shaft (), two rotating members () that form a rotation transmission mechanism for rotating the spindle () and that transmit drive force of the rotation driving device () are fastened to each other at respective connection sections thereof by a bolt group () and are connected to each other so as to be prevented from rotating relative to each other by friction force resulting from the fastening. Rotation prevention torque based on the friction force is a value greater than torque applied to the connection sections during processing and smaller than torque applied to the connection sections when external force that causes the spindle () to deform beyond a permissible range is applied to the spindle (). Therefore, even if the tool or the spindle () collides with, for example, a processing tool, the spindle () does not become deformed beyond the permissible range.