COMBINED HYDROMECHANICAL DRIVE OF PLANETARY GEARBOX GEAR SHIFTING RANGES Russian patent published in 2015 - IPC F16H59/04 B60K20/02 

FIELD: transport.

SUBSTANCE: this drive comprises stationary case (1, 8), planetary mechanism (2, 3, 4) with one link moving along and around central axle (5) of planetary mechanism and two-way hydraulic actuator. Stationary part of the latter is coupled with case (8) while moving part (12, 13) is engaged with said link of planetary mechanism via axial bearing (17). Hydraulic actuator features the cylindrical sliding surfaces of stationary part (1, 8, 9) are internal surfaces. Cylindrical sliding surfaces of stationary part (12, 13) are external surfaces. Diameter of mid sliding surfaces is smaller than those of extreme cylindrical sliding surfaces. Through cylindrical bore aligned with cylindrical sliding surfaces has the through cylindrical bore. Linear displacement drive centring mechanism at first mid position actuates the first spring mechanism (22, 23, 24) and second spring mechanism (25). Lever-cam mechanism to displace the drive from first mid position to second one comprises cam (26) and drive element (27) fitted on common shaft (28). Said cam and drive element are configured to make shaft (28) spin about its axis and reciprocate there along. Said cam can contact with drive moving part (2). Drive displacement from first mid position to second one is executed at turn of drive element (27) and shaft (28) about its axis.

EFFECT: decreased weight and sizes, longer life.

25 cl, 7 dwg