| 摘要 |
PURPOSE:To achieve highly stable and responsive control by assembling a servo valve in the crank shaft of a radial piston liquid pressure motor and transmitting the variation of movement of an eccentric wheel to a spring contacting through an inclined face with the servo valve. CONSTITUTION:The motor is provided with an eccentric wheel 6 movable around a crank shaft 1 in the casing 4 while more than three pistons 8 are arranged around said wheel 6. While control pistons 24, 25 are fitted in control cylinders 26, 27 provided in said wheel 6 while facing with the crank shaft 1. Here, a servo volve A is arranged integrally at the inner end of the crank shaft 1. Said servo volve A is provided with a spool 28 inserted into a tubular hole 29 and upon up/down motion of the rod 53 caused through the motion of said wheel 6, the rod 52 is moved to the left/right through the inclined faces of the rods 53, 52 thus to vary the energizing force of the spring 51.
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