| 摘要 |
PURPOSE: To prevent the sliding and vibration of arbor to prevent fatigue failure by towing machine elements by use of a thread mechanism, which causes a thread pin to revolve and rotate about its own axis by the rotation of a towing shaft and which rotates to move back and forth through engagement, and a differential screw which utilizes a difference in pitch, and securely connecting the elements together. CONSTITUTION: When the towing thread part 11 of a towing shaft 10 is threaded into a towing threaded hole 12 in arbor la, a thread of a pinch (n) between the arbor la and the towing shaft 10 and a thread mechanism corresponding to a pitch (m) between the towing shaft 10 and a main spindle 2a constitute a so-called differential spring, thus enabling the towing shaft 10 to tow the arbor la with a large towing force. Moreover, frictional forces resulting from the engagement of the threads between the towing shaft 10 and the main spindle 2a are greatly reduced by the thread mechanism similar to a planetary gear train which uses a threaded pin 7, whereby the efficiency of the differential spring is remarkably enhanced to enable the generation of a large towing force. |
