Machine element or mechanism – Gearing – With fluid drive
Patent
1994-05-12
1996-02-27
Ta, Khoi Q.
Machine element or mechanism
Gearing
With fluid drive
477 68, 747301, F16H 4700
Patent
active
054939380
ABSTRACT:
A transmission for a heavy construction equipment such as a wheel type excavator adopting the hydrostatic drive system for transmitting travelling power. The transmission applied to a heavy construction equipment having an upper turning body, a lower travelling body and a turning joint for coupling the upper turning body to the lower travelling body so as to turn the upper turning body with respect to the lower travelling body and having a gear box disposed in the lower travelling body and provided with clutches for at least two speed change stages, and a control unit disposed in the upper turning body, a charging pump disposed in the upper turning body, a power shift motor disposed in the lower travelling body and adapted to be actuated by an oil fed from the charging pump, and a power shift pump disposed in the lower travelling body and adapted to be actuated by the power shift motor, with the gear box performing a speed change operation by oil fed from the power shift pump.
REFERENCES:
patent: 4186739 (1980-02-01), Hamma et al.
patent: 4620560 (1986-11-01), Countant
patent: 5101627 (1992-04-01), Fujh et al.
patent: 5111716 (1992-05-01), Sato et al.
Samsung Heavy Industry Co. Ltd.
Ta Khoi Q.
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