DE1185410B - Device for adjusting the height of the mower table of combine harvesters - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Boarding school Class: AOId

German KL: 45 c -41/12

Number: 1185410

File number: D 33114 HI / 45 c

Filing date: April 14, 1960

Opening day: January 14, 1965

The invention relates to a device for adjusting the height of the cutting table of combine harvesters, in the case of the one between the cutting table and an articulated one with the combine harvester chassis Lever a hydraulic lifting device for swiveling the cutting table around a horizontal one Axis is arranged.

The purpose of the invention is to create such a device, on the one hand from the The operator's seat of the combine harvester can be fine-tuned independently of the hydraulic lifting device the height of the cutting table above the ground for the purpose of adjusting the stubble height and on the other hand a yielding of the mower table in the height direction in such a way that it allows to avoid of damage when bumping into stones or when driving over other bumps can pivot upwards and then automatically adjust to the desired height again.

A device of the type mentioned in the introduction is known in which the cutting height of the mower can be adjusted independently of the actual lifting device. The remains When lowering the mower table, stand at the set height above the ground. In this device exist Disadvantages insofar as the cutting height cannot be easily adjusted from the driver's seat, and when the mower table has no way of freely pivoting upwards when the mower is on meets an obstacle.

It is also a device for adjusting the cutting height of the cutting table is known, in which the The mower table can pivot freely upwards if the mower hits an obstacle. However is in this known device only a single simple adjustment device available, the one Has lever arm with a rotatable spindle nut, into which one from the driver's seat of the tractor adjustable adjusting spindle engages.

The aforementioned purpose of the invention is achieved while avoiding the disadvantages of the known devices achieved in that the pivotable lever with the lifting device and with a fine adjustment device is articulated, which consists of an adjusting spindle which at its upper end in is mounted near the combine operator's seat and at its lower end with a thread in a nut engages which is displaceable in a holder connected to the lever.

A spring is preferably arranged between the nut and the upper end of the holder, by means of which the downward movement of the cutting table,

Device for adjusting the height of the
Mowing tables of combine harvesters

Applicant:

Dronningborg Maskinfabrik A / S,

Dronningborg, Randers (Denmark)

Representative:

Dr. E. Wiegand, Munich 15,

and Dipl.-Ing. W. Niemann,

Hamburg 1, Ballindamm 26, patent attorneys

Named as inventor:

Kaj William Thomas Hingelberg Nielsen,

Dronningborg, Randers (Denmark)

which he moves upwards when driving over a stone or other bump, for example has pivoted, is braked.

An embodiment of the invention is described below with reference to the schematic drawing, for example explained.

The mower table denoted by 1 is suspended at its upper end in the combine harvester chassis so that it can pivot about an axis 2. The lower end of the cutting table 1 is provided with knives 11 for cutting the fruit.

The mower table 1 is pivotably connected to a hydraulic lifting device 7 consisting of a cylinder and a piston. The cylinder is articulated at one end to a console of the cutting table 1, while the piston is articulated to a lever 8 at its protruding free end. One end of this lever 8 is connected by a pivot pin 9 to a part 13 of the combine harvester chassis, while its other end is connected by a pivot pin 10 to a fine adjustment device. The fine adjustment device consists of a holder 6, a is in the slidable nut 5 and formed an adjusting spindle 3, the lower end having a screwed into the nut 5 and threaded hand crank as the upper end 3a. A spring 4 is provided between the upper end of the tubular or frame-shaped holder 6 and the nut S. The lever 8 is articulated to the lower end of the holder 6.

409 768/45

For fine adjustment of the stubble height, i. H. the distance between the knife and the surface of the earth the adjusting hand crank 3 ″ operated in such a way that the spindle 3 more or less far into the nut 5 is screwed in. Here, the distance between the upper end of the spindle 3 and the changes Nut 5, the movement of which is transmitted to the holder 6 by the spring 4, the lever 8 to the Pin 9 is pivoted so that the lifting device 7 pivots the mower table 1 about the axis 2.

The spring 4 causes the mower table 1 to move when driving over a stone or other bump can be raised slightly to then return to the desired height setting Able to fall back after the combine harvester has passed the bump, with the spring 4 falling decelerates.

Claims (2)

Patent claims: 1. Device for adjusting the height of the cutting table of combine harvesters, in which a hydraulic lifting device for pivoting the cutting table about a horizontal axis is arranged between the cutting table and a lever that is articulated to the combine harvester chassis, characterized in that the pivotable lever (8) is articulated to the lifting device (7) and to a fine adjustment device, which consists of an adjusting spindle (3) which is mounted at its upper end near the combine operator's seat (12) and at its lower end with a thread in a nut ( 5) engages, which is displaceable in a holder (6) connected to the lever (8). 2. Apparatus according to claim 1, characterized in that between the mother and the a spring (4) is arranged at the upper end of the holder. Considered publications:
German patent application L 1460 III / 45 c (published on June 11, 1952);
U.S. Patent Register No. 2,609,649. 1 sheet of drawings 409 768/45 1.65 © Bundesdruckelei Berlin