| 摘要 |
1,269,591. Joy-Stick control, R. E. MULLER. 30 Jan., 1970 [4 Feb., 1969], No. 4672/70. Heading B3B. Apparatus for simultaneously and independently controlling movements of two motion transmitting elements, e.g. for moving a machine tool carriage in one direction and a work slide movable on the carriage in a path at right angles to said direction, comprises a first universal joint 3, 4 connecting a control member 5 to a fixed structure 1, 2, for angular movement towards and away from a neutral position, two arms 13, 14 mounted on said control member and extending therefrom, second and third universal joints 15, 16 at the end of each arm 13 and 14, two actuator means 28, (29) (Fig. 2, not shown) causing movement of said motion transmitting elements, linkage means 17, 20, 24 and 18, 21, 25 secured to said second and third universal joints and connecting said arms 13, 14 to said actuator means 28 (29), and means biasing the control member 5 towards a neutral position. A pin 11 prevents rotation of the control member 5 about its own longitudinal axis. The control member 5 is spring biased to its neutral position about two axes by springs (54) (Fig. 3, not shown) in the actuator means 28, (29). The control member 5 may be locked at its extremity of movement by permanent magnets, or electromagnets controlled by a switch 10, acting in a collar of a control rod 26 of the actuator means. Alternatively the position of the collar may be held by a magnet to block off an air valve, the collar being released by an air pressure pulse. The actuator means 28 (29) (Fig. 3, not shown) comprises a piston (31) having a lug 57 for attachment to motion transmitting means for the carriage and slide. The piston (31) moves in a chamber and has unequal pressure face areas. The piston is connected to the control rod 26 via a lost-motion pin-and-slot device so that initial movement of rod 26 relative to the piston acts as servo-valve control of movement of the piston. |
