Device to determine the position of a slide table

Abstract

Abstract PURPOSE:To provide a device to determine the vertical and horizontal positions of a slide table, consisting of one slide table, four rod-turning chains and one coupling rod, designed to reduce the thickness of the entire device and to simplify its structure. CONSTITUTION:Pulse motor PM and 2 bearings 9 are fixed on support 8. Gear 10 fitted to the rotary shaft of the above-described moter PM is engaged with gear 11, which forms an integral unit together with ball nut BN engaged with ball screw BS. Vertical pin 12 provided at the lower side of support 8 is fitted into ball bearing 13 on stationary table 1, and thereby transport unit U is formed. Three such units U1-U3 are fitted on stationary table 1 at C, D, and F. One end of each ball screw, BS1-BS3, is fitted on table T at A, B, E, and thereby a device to determine the vertical and horizontal positions of a slide table is formed. In this case, ACDB forms four rod-turning chains where four links form a parallelogram.

Inventors

• 👤 Shuji Takeshita
• 👤 Toshihiro Sakamura

Bibliographic Details