1991-12-06
1993-05-25
Bagnell, David J.
Harvesters
Gang
56 136, A01D 3466
Patent
active
052129365
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a disc cutter bar comprising an elongate, relatively flat housing formed by an upper part, and a lower part, which parts form an upper wall, a lower wall, a front wall and a rear wall, and having a plurality of cutter discs which are rotatable about substantially vertical axes and whose shafts carry gear wheels which are arranged in the housing and are in drive connection with each other through a row of idle gear wheels, the cutter bar being provided with a longitudinal reinforcing beam extending rearwardly with respect to the rear wall of the housing and having an upper wall and a lower wall which are welded to or integral with the upper part and lower part respectively of the housing so as to define a cavity extending longitudinally and defined by the rear wall.
BACKGROUND OF THE INVENTION
A disc cutter bar of this general type has been disclosed in U.S. Pat. No. 4,426,827.
In U.S. Pat. No. 4,709,540 a disc cutter bar is shown in which the housing is reinforced by means of a box-shaped beam provided with a series of regularly spaced, forwardly protruding ears which are fixed to a rearwardly extending flange on the housing by bolts and nuts.
SUMMARY OF THE INVENTION
According to the present invention the disc cutter bar is provided with a longitudinal reinforcing beam extending rearwardly with respect to the rear wall of the housing and having an upper wall and a lower wall which are welded to or integral with the upper part and lower part respectively of the housing so as to define a cavity extending longitudinally along and defined by the rear wall.
The structure thus defined is cheaper to produce and more rigid than the prior art bars mentioned above. In addition, a convenient possibility is provided to increase the amount of oil available to the gear housing by utilizing the cavity of the reinforcing beam as an oil reservoir, so that lubrication of the many movable parts can be improved and the life thereby prolonged.
In one embodiment of the invention, a reinforcing beam is fixed to the gear housing by welding, whereas in another embodiment a reinforcing beam is integral with the gear housing.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will be explained more fully below with reference to the drawing in which,
FIG. 1 is a cross-section through an embodiment of the disc cutter bar of the invention through a cutter disc axis.
FIG. 2 is a cross-section of the same bar through an idle wheel axis.
FIG. 3 is a cross-section of a second embodiment of the bar of the invention through the axis position of a cutter disc, which is not shown, but may be of the same type as one shown in FIG. 1.
FIG. 4 is a cross-section of a third embodiment of the bar of the invention through an idle wheel axis.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
In FIGS. 1 and 2, 10 is the upper part and 11 is the lower part of a disc cutter bar. The two parts are welded together along the edges as shown at 12 and 13 to form a housing for the gear wheels driving the cutter discs. Such a cutter disc is shown at 14 in FIG. 1. It carries cutters 15 at two diametrically opposite positions at the periphery, said cutters being pivotable about bolts 16. The disc is secured by bolts 17 to a hub 18 which is welded to a shaft 19, which is journaled in a bearing ring 22 by means of ball bearings 20 and 21. The bearing ring 22 is secured to the upper part 10 by means of bolts 23 and nuts 24 which are welded to the inner side of the upper part. An 0-ring 25, fitted in an annular groove in the bearing ring, is interposed between the bearing ring 22 and the upper part 10. The inner end of the shaft 19 has wedged to it a gear wheel 26 which is additionally kept in position by a retaining disc 27 and a bolt 28 screwed into the end of the shaft.
The cutter carrying bolts 16 also serve to secure a ring-shaped disc 29, which, at its inner edge, carries a cylindrical guard 30 coaxial with the cutter disc.
A longitudinal, cross-sectionally substantially U-shaped reinforcement ba
REFERENCES:
patent: 4157004 (1979-06-01), van der Lely
patent: 4231216 (1980-11-01), Weber
patent: 4237679 (1980-12-01), van der Lely
patent: 4426827 (1984-01-01), Oosterling et al.
patent: 4497161 (1985-02-01), Vissers et al.
patent: 4693061 (1987-09-01), Koch et al.
patent: 4709540 (1987-12-01), Collart
patent: 4727711 (1988-03-01), Quataert
patent: 4986060 (1991-01-01), Walters et al.
patent: 4986061 (1991-01-01), Frumholtz et al.
Bagnell David J.
Maskinfabriken Taarup A/A
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