| 摘要 |
A shredding machine for tires or the like including a head having generally parralel, rotatable shafts each bearing feeding and cutting elements thereon for coaction with the feeding and cutting elements on the other shaft. Bidirectional, hydraulic motors are operable to rotate the shafts in opposite directions and are included in a closed loop hydraulic circuit with a hydraulic pump. The circuit is also provided with a device for reversing the direction of fluid flow in the line to reverse the direction of the motors in response to an increase in pressure in the line in excess of a predetermined amount. The circuit also includes a flow control valve for limiting volumetric flow of hydraulic fluid to one of the motors so that the same will, when in a no-load condition, rotate at a lesser rate than the other. The circuit also includes a bidirectional pressure relief valve.
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