Motor vehicles – Motor as source of power for other machine – Hydraulic drive to other machine
Patent
1996-12-10
1998-02-17
Camby, Richard M.
Motor vehicles
Motor as source of power for other machine
Hydraulic drive to other machine
180305, 180306, 74 154, 74718, 74 156, B60K 1700
Patent
active
057182990
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to a drive device for agricultural harvesters which includes a power takeoff upstream of a transmission unit and a clutch downstream of the power takeoff and upstream of the transmission unit.
BACKGROUND OF THE INVENTION
The Vogel Technical Book series "Agricultural Engineering" titled Encyclopedia of Agricultural Engineering, by Robert Fritz Kuntze (First Edition, 1987) on pages 70 and 71 describes drive trains for combines in which power is conveyed from an internal combustion engine (diesel engine), via a hydraulic pump, to a hydraulic motor, which acts on the driving wheels of the agricultural harvester via at least one gear unit. Information on brakes and drives for further devices of the agricultural harvester cannot be found in this prior art.
Great Britain patent GB-A-912, 109 shows a tractor drive train for the drive wheels which includes a differential having a decoupling feature.
U.S. Pat. No. 2,158,483 shows two power takeoff shafts at right angles to one another and driven by an angular gear unit.
OBJECTS AND SUMMARY OF THE INVENTION
It is an object of the invention to create a drive device for an agricultural harvester that is simply constructed in terms of design and provides a problem-free drive for further devices of the agricultural harvester.
This object is achieved by use of a power takeoff in the drive train for the driving of further devices of the agricultural harvester. A clutch is provided downstream of the power takeoff by which the drive to the driving wheels can be engaged or disengaged. This arrangement has the advantage that only a single drive (prime mover) is required both for the driving of the agricultural harvester itself and also for further devices of the harvester. The power takeoff is provided so that this drive can operate in problem-free fashion, a clutch being arranged in the drive train downstream of the power takeoff, with which clutch the drive to the driving wheels can be engaged or disengaged so that the drive of the harvester can be operated independently of the further devices and/or the other way around. Thus it is conceivable, for example, that the further devices are still driven while the movement of the harvester is halted, so that the processing operation taking place in the harvester can continue. This structure, moreover, has the advantage that a commercially available transmission must be supplemented only by the power takeoff and the clutch, so that the drive device according to the invention also represents an economical solution. Since commercially available and standard transmissions have been proven in practical applications, the supplementation according to the invention is also simple in terms of design and is problem-free.
In development of the invention, in order to enhance the efficiency, a clutch is placed downstream of the power takeoff by which the further devices can be engaged or disengaged. The supplementation of such a clutch has the advantage that the drive possibilities are augmented because, first, the drive to the driving wheels can be engaged or disengaged and, second, the drive for the further devices of the harvester can be engaged or disengaged. In this way, depending on the operating conditions of the agricultural harvester, the possibilities exist that both the driving wheels and also the further devices are driven, that only the driving wheels or only the further devices are driven, or that the driving wheels are halted and also the further devices are disengaged so that the prime mover is in a quasino-load condition.
In development of the invention, the clutch arranged in the drive train is made as a non-positively operating clutch and/or the clutch arranged upstream of the further devices is made as a positively operating clutch. This has the advantage that the individual components (drive of the driving wheels and drive of the further devices) can be optimally engaged in the drive train or disengaged from the drive train, depending on their design features and their intende
REFERENCES:
patent: 4440416 (1984-04-01), Claas et al.
patent: 4691802 (1987-09-01), Ishimori et al.
patent: 4727759 (1988-03-01), Yamaoka et al.
Berghorn Hermann
Hafele Martin
Camby Richard M.
SAME S.p.A.
Schwab Charles L.
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