| 摘要 |
In a four-wheel-drive tractor, the power is transmitted from the tractor gearbox (3) or from a separate power take-off gearbox to the differential gear (9) of the driving front axle by means of a cardan shaft (7) or a corresponding power transmission member. At the front end of the tractor, a power take-off shaft (12) is provided, by means of which the power can be transmitted from the engine crankshaft (4) to necessary equipment from the front end of the tractor. The differential gear (9) of the driving front axle, the clutch (8) of the four-wheel drive, bx means of which the power can be connected from the cardan shaft (7) or from a corresponding power transmission member to the differential gear (9), the clutch and power transmission devices (11, 12, 13) for their main parts, and the hydraulic steering pump (14) are fitted inside the oil sump (2) acting as the oil reservoir of the engine (1). The operations of the clutch (8) of the four-wheel drive, of the differential lock (10), and of the clutch (13) of the front power take-off are arranged so as to be controlled by means of the return fluid (B) of the hydraulic control system. The devices fitted inside the oil sump are at least partly supported on the oil sump (2), which is arranged so as to act as a carrying frame component of the tractor. |
