| 摘要 |
PURPOSE:To easily perform a feedback control, by forming two stripes of tooth rows on the supporting surface of a tilt moving plate while engaging one tooth row with the operating lever of an actuator and connecting the other tooth row with the operating lever of a stepping motor through a gear arranged in a selector valve spool. CONSTITUTION:A swash plate type fluid hydraulic engine forms on the supporting surface of its tilt moving plate 10 two stripes of tooth rows 38, 46. And the engine engages one tooth row 38 with an operating lever 39 of a fluid hydraulic actuator 35 while the other tooth row 46 with an operating lever 36 of a stepping motor 48 through an idle gear 40 supported to a spool 45 of a selector valve controlling operation of the fluid hydraulic actuator 35. If the operating lever 36, being operated as an initial member, turns, the idle gear moves upward with the tooth row 46 serving as the supporting point. In this way, the spool 45 moves upward to supply working fluid to the actuator, and the tilt moving plate turns, but this turning motion moves the idle gear downward to be reset to the basic position.
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