发明名称 |
Hydrostatic-mechanical drive for vehicular cement mixers |
摘要 |
In a cement-mixer truck having a mixing drum rotated via a step-up transmission by a hydrostatic motor in turn energized by a power pump driven by the vehicle engine, the motor is disposed in a chamber at least partially filled with coolant replenished by leakage from the power pump and the motor and by oil from a valve housing supplied via a pressure-regulating and a bleeding valve respectively tapping high-pressure and low-pressure pumping conduits of a hydraulic circuit. The motor coolant chamber is surrounded by an oil reservoir connected at an output via an internal filter and a second engine-driven pump to the hydraulic circuit for feeding oil thereto and at an input via a heat exchanger to the motor chamber for drawing hot fluid from the motor bath, the reservoir serving in part to reduce noise from the hydraulic motor. A ventilating fan at the heat exchanger and a water pump are driven directly by the same shaft that is connected to the step-up transmission.
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申请公布号 |
US4329064(A) |
申请公布日期 |
1982.05.11 |
申请号 |
US19800116978 |
申请日期 |
1980.01.30 |
申请人 |
ZAHNRADFABRIK FRIEDRICHSHAFEN AG |
发明人 |
MANN, EGON;EYMUELLER, HELMUT |
分类号 |
B28C5/42;B60P3/16;(IPC1-7):B28C5/18 |
主分类号 |
B28C5/42 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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