ADVANCING REVERSING OPERATION MECHANISM FOR VIBRATION COMPACTING MACHINE

摘要

PROBLEM TO BE SOLVED: To provide an advancing reversing operation mechanism to lighten an operation force for the advancing reversing switch shaft of a compacting machine. ;SOLUTION: By an oil pressure against a mechanical return force generated by rotation of an eccentric pendulum, the advancing reversing switch shaft of an exciting device 1 is axially moved and rotation of the pendulum is switched to an advancing reversing direction. In this case, a cylinder-form body 21 is provided at an interior with a piston 28, having one end side on which a mechanical return force is exerted from the direction of an advancing reversing switch shaft, and a sprue 29 interlocking with an operation lever 23 slidably inserted in the internal part on the other end side of the piston 28. A servo valve mechanism is provided to feed pressure oil, fed from a hydraulic pump 36 outside a body to the sprue 29, to the other end side of the piston 28 as a pressure against a mechanical return force from the direction of an advancing reversing switch shaft.;COPYRIGHT: (C)1999,JPO