Motor vehicles – Manually actuated controlling devices – With movable control station or seat position
Patent
1979-04-30
1982-07-20
Peters, Jr., Joseph F.
Motor vehicles
Manually actuated controlling devices
With movable control station or seat position
B60K 2500
Patent
active
043401279
DESCRIPTION:
BRIEF SUMMARY
This invention relates to a tractor, particularly for use in agriculture, comprising a subframe supported by wheels, caterpillar tracks or a combination thereof, engine and transmission means on the subframe for propelling the tractor and driving the implements coupled to it, and a driver's cab connected to the subframe.
When a conventional tractor is driven without any implements coupled to it the tractor offers the driver a good driving position, but when implements are drawn, for instance in ploughing, the driver must constantly keep watch both forwardly and rearwardly and therefore occupies a semi-twisted posture which in time is extremely tiring and most trying to the body. It has proved that such a posture results in occupational injuries, particularly spinal trouble. The problem is known to all persons occupied in agriculture and generally considered insoluble inasmuch as the driver must direct his attention in diametrically opposite directions.
There is another problem associated with tractors, namely the many accidents which according to statistical socio-medical investigations happen to about 25% when the drivers step into or out of their cabs. To climb on to and step down from a tractor is becoming ever more difficult the larger and higher the tractors, and even if improvements are made, the problem becomes more and more serious.
A further problem of the increasing tractor and pertaining implement sizes is that they most unfavourably compact the soil. This soil compaction takes place both in the surface layer and in the sub-soil. The compacted surface layer is broken up at the treatment of the soil (ploughing, harrowing, etc.) whereas the compaction of the sub-soil is not affected by the treatment of the soil. Both types of compaction alter the natural consistency of the soil organism in different ways. Particularly serious is the compaction of the sub-soil, which reduces the drainability of the soil and disturbs the capillary forces which lead water upwards to the plants.
The object of the present invention is to solve the problems of the tractor drivers in a structurally simple manner and at the same time at least partially reduce the soil compaction problem.
Another object of the invention is to manufacture a tractor which is more useful than conventional tractors.
These and further objects of the invention are attained in that both the drive unit and the cab are detachably connected to the subframe and that the cab is connectable with the free end of a telescoping arm.
With a tractor built in this manner and particularly if the cab is vertically pivotally connected to the telescoping arm and the latter in turn is vertically and horizontally pivoted to the subframe and is extensible from a length smaller than that of the subframe to a length considerably greater than that of subframe, the driver can dispose the driver's seat in a position suitable for each individual implement, for instance behind or obliquely behind a plough, and can thus occupy a convenient sitting position and check both the direction of travel and the plough only by raising and lowering his eyes. When the tractor is driven for transport purposes the invention makes it possible to place the cab at a location prepared for it on the subframe and lock it, if necessary. A further advantage gained with a tractor constructed in this manner is that the cab during operation of the tractor normally is spaced from the subframe, whereby the risk of accidents is diminished. As the cab is pivotal and vertically adjustable the driver can enter and also step out of the cab directly from the floor thereof to the ground without being forced to climb, if only the cab is swung laterally outwards and lowered to ground level. It will thus be possible to eliminate accidents in connection with the driver's entering and leaving the cab. The suspension of the cab in a telescoping arm also entails a considerable reduction of the vibrations normally occurring on a tractor. The tractor can also be used for other purposes than purely agricultural work
REFERENCES:
patent: 1296309 (1919-03-01), Netzel
patent: 3182605 (1965-05-01), Brasher
patent: 3720047 (1973-03-01), Lely
patent: 3732942 (1973-05-01), Hobbensiefken
patent: 4141591 (1979-02-01), Spicer
Peters Jr. Joseph F.
Weaver Ross
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