| 摘要 |
672,605. Lathe details. USINES TORNOS, FABRIQUE DE MACHINES MOUTIER SOC. ANON. Oct. 17, 1950 [Oct. 18, 1949], No. 25275/50. Class 83 (iii). A tool rest for lathes and like machine-tools comprises a tool-carrier of the type described in Specification 610,612 pivotally secured to a slide movable on a slideway by a screw and nut, the latter abutting the slide through a ball thrust bearing and on rotation adjusting the slide against the action of a spring. The toolcarrier 11 is pivotally mounted on a slide 10 movable on a guideway 12, to which is secured a screwed rod 13 engaged at its free end by a nut 15. The latter is integral with a wormwheel 15a, shaped at 15b to receive a wrench. The nut is provided with a graduated collar 22 and operates through a thrust bearing 16, a spring 14 returning the slide 10 on reverse rotation of the nut. Coarse adjustment of the slide is effected by direct rotation of the nut by a wrench, and a fine adjustment is obtained from a worm 17, Fig. 3, mounted in a stirrup 18 hinged to the slide, which is brought over to engage the worm with the worm-wheel 15a. A spring-pressed centring member 19 engages a centre hole in the end of the nut to retain the stirrup in the position of engagement of the worm. Specification 610,612 is referred to. |
