DE1197266B - Spring-loaded mower back for mowing machines - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. Cl .:

Number:
File number:
Registration date:
Display day:

AOId

German class: 45 c-55/04

1197266
B61343III / 45C
February 18, 1961
July 22, 1965

The invention relates to an elastic and resilient Knife back made of steel or plastic lamellas of high strength for mowing machines of all kinds. The Knife backs of mowing machines that have been customary up to now consist of an elastic steel rod on which the individual knife blades are riveted on, which run back and forth quickly between the mowing fingers on which the finger plates are located.

Because of this rapid back and forth movement, the back of the knife and thus the knife blades is forced on by a crank mechanism, is the back of the knife running in a guide exposed to large vibrations, with the fact that the cutter bar slides over the irregular terrain of the back of the knife, continuously changing bends, twists and is exposed to shocks to which this, albeit made of the best-suited steel, on the Duration has not grown. Therefore, signs of fatigue appear very soon, which ultimately lead to Break. Unpleasant operational disruptions and costs are annoying consequences. An American invention searches for the effect of the impact movements on the fastening rivets of the knife blades to reduce a plastic insert between the rigid knife back and the knife blades.

The present invention, however, avoids the above-mentioned shortcomings in that the Knife back made of several lamellas made of steel or high-quality plastic, possibly also made of two substances, which by means of the fastening rivets of the knife blades form a springy one Package are assembled, with the number of lamellas starting from the end of the knife, accordingly the stress caused by the increasing number of riveted knife blades against the The clamping point on the cutter head grows too.

The weight of such a knife is significantly less than that of the usual, so that the for the rapid cutting movement required by the motor or the draft animals as well gets smaller. This means less fuel consumption and greater protection of the machines brought about.

Furthermore, the aforementioned construction of the knife back also allows the lubrication of the into consideration coming sliding surfaces in that lubrication holes are provided in the slats, the are arranged between the fastening rivets of the knife blades and below that in the knife holders screwed-in grease nipple.

The springy mower knife also shows we-springy mower knife backs for mowing machines

Applicant:

Dipl.-Ing. Paul Braun,
Ellwangen / Jagst, Schloßvorstadt 5

Named as inventor:
Dipl.-Ing. Anton Alphart,
Weidling (Austria)

Significantly better cutting ability and higher edge retention than the usual knife.

Further details, features and advantages of the invention are explained with reference to the drawing. This shows an example of an embodiment of the knife back according to the invention. It shows

F i g. 1 shows a mowing finger with the back of the knife in cross section and

F i g. 2 the back of the knife in longitudinal section.

In Fig. 2 shows an example of an embodiment of the lubrication.

The knife blades 2 moved back and forth on the finger plates 1 are riveted with their fastening rivets 3 on the lamellae 4, 5, 6 and 7 and rest with the sliding surface A on the finger plates and the horizontal, displaceable guide plate 9. The resilient lamellae 4, 5, 6 and 7, which form the back of the knife, are guided laterally by the sliding surface B on the mowing fingers themselves and the sliding surface C on the guide plate 9. The knife holders 10 press the knife down over the sliding surfaces D , at which points the Räumplattenil are riveted.

The parts 9 and 10 are fastened to the mowing finger with a screw, the axis of which is denoted by S.

It is easy to see that the cross-section of the back, which is broken up into individual lamellae, is the described disturbing movements and vibrations can follow more easily than a corresponding one full cross-section, so that it is exposed to far less stress and therefore weaker can be held.

As also the F i g. 1 and 2 show, it is possible through the slat construction according to the invention, to subject the mower blade sliding surfaces to ongoing lubrication. For this purpose, grease nipples 12 provided which are in communication with bores 13. These holes extend through the

509 627/34

Knife holder 10, the clearing plate 11 and the lamellas 4, S and 6 up to the lowest lamella 7, so that the lubricant reaches the contact spaces between the lamellae through the centrifugal force of the reciprocating knife movement through these holes, where it also gets is spread out on all sides by capillary action and brought to the running surfaces A, B, C and D.

Claims (3)

Patent claims: 1. Elastic knife back for mower cutting units, characterized in that that it consists of spring lamellas, which are closed by means of the fastening rivets of the knife blades a resilient package are riveted together, the number of lamellas from the knife end beginning, according to the stress caused by the increasing number of riveted Knife blades, growing against the clamping point on the knife head. 2. Knife back according to claim 1, characterized in that the spring package made of steel and / or plastic lamellas. 3. Knife back according to claim 1 or 2, characterized in that in the lamellae Lubrication holes are provided between the fastening rivets and below in the Knife holders of screwed-in lubrication heads lie. Considered publications:
U.S. Patent No. 2,716,324. For this purpose, 1 sheet of drawings 509 627/34 7.65 © Bundesdruckerei Berlin