Change speed control structure for hydraulic transmission

Machine element or mechanism – Mechanical movements – Reciprocating or oscillating to or from alternating rotary

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Details

74 8922, 74473R, 74506, B60K 1702, B60K 2002, B60K 2012

Patent

active

049074652

ABSTRACT:
A change speed control structure for a hydraulic transmission comprising a rotary valve for controlling a plurality of hydraulic actuators, a shift lever extending through a crooked guide groove, and a relay assembly for transmitting movements of the shift lever to the rotary valve on a reduced scale. The guide groove includes three straight portions extending parallel to one another in series and offset in a transverse direction thereof, each straight portion including a plurality of change speed positions. An adjacent pair of the straight portions are interconnected end to end by a bight portion.

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