Friction feed mechanism

Abstract

Abstract PURPOSE:To perform positioning with high accuracy by small-sized simple constitution by constituting a magnetic circuit between a drive shaft and a friction roller and obtaining the pressing force of the drive shaft with the friction roller whose lead angle is made changeable by utilizing the magnetic force of the magnetic circuit. CONSTITUTION:A magnetic circuit containing a friction roller 48, a drive shaft 12 and a holding member 42 is usually constituted of permanent magnets 51A, 51B, and the roller 48 and the shaft 12 are attracted mutually to generate pressing force. When a current is supplied to shape memory wires 62A, 62D in this state, a revolving shaft 43 is revolved and a revolving plate 63 strikes on a stopper 66A and the lead angle of the roller 48 is set to fine adjustment feed. Herein, a current is supplied to the piezoelectric element 73 of a lock means 71 to displace the same and the revolution of the shaft 43 is prescribed. When a current is supplied to shape memory wires 62B, 62C, the plate 63 strikes on a stopper B and the lead angle of the roller 48 is set to high speed feed. By this method, positioning can be performed with high accuracy by small-sized simple constitution.

Inventors

• 👤 Katsuhide Sawada
• 👤 克秀 沢田
• 👤 Yusofu Hojiyatsuto
• 👤 ユソフ ホジャット

Bibliographic Details