DD145046A5 - MESSERANDRUECKER - Google Patents

Description

12 488 56

Measerandrücker

Field of application of the invention:

The invention relates to a device for pressing the movable blade against the fixed blade of an alternately operating cutting device for mowers, combine harvesters, mowing machines, etc.

Char akteristik of the known technical , solutions:

The cutting quality and labor productivity of mowers, combine harvesters and mowers is decisively determined by the puncture of the cutting device, an ein.Inintakte cutting edge and the correctly set distance of the knife to each other are the basic requirements for this. From the point of view of handling and maintenance of the cutter plays the

quick and easy interchangeability of the sealed movable knife, as well as the ITachbarkeit of the through. Wear increasing knife spacing or the adjustability of the knife distance to the appropriate value for the respective plants, a crucial role

These requirements were solved in the previously known devices best by the proposed in DD-PS 115 558 and 119 114 means

The essence of the basic solution (DD-PS 115 558) is that the Messerandrücker - which are called in the interest of better distinction of the entire device in the present case clamps - equipped with screwed on the cutter bar leaf springs and by means of pins in two positions, ie in a closed and in an open position, can be adjusted. In the closed position, the clamp presses the movable knife against the fixed knife, while in the open position, the movable knife can be replaced. In the completed variant of the proposed solution (DD-PS 119 114), the replacement of the movable knife is made possible even in the case of wide cutting devices by a single person, that in a, formed in the symmetry axis of the terminal bore a profiled helical element is arranged , by its rotation, the terminal can be raised or «locked in this state against rotation.

The basic solution, as well as its completed variant have the disadvantage that the force required to depress the movable blade spring force is removed from the leaf springs mounted between the clamps on the cutter bar, i. of separate components, thereby reducing the manufacturing cost of the device rather complicated anyway

- 3 -.

be increased significantly From agrotechnischem point of view is also a disadvantage that due to the length of the adjusting screw below the stubble remains too high and thus a large part of the usable feedstock material lost,

Object of the invention:

The aim of the invention is to eliminate the above-mentioned Mach parts, wherein a device is proposed, which is easy to handle at low production costs _o

; the nature of the invention ;;,

The invention has for its object to develop an improved knife presser that largely corresponds to the agrotechniochen requirements and has a simple structural design.

This object is achieved in that the back of the clamp between the cover part and the foot suitably curved arcuately on the screw shank of the screw between the screw head and the. Cover part a disk is rotatably arranged, which has a wedge on the side directed towards the lid part, the wedge lockingly rests in the closed position of the knife on the lid member and in the open position thereof engages by rotation in a slot in the lid part.

Ausführun ^ SExample:

The invention will be explained in more detail below using an exemplary embodiment. In the accompanying drawings show:

-.4

Pig. 1: a section of the terminal in ge. closed position,

Pig. 2: a section of the clamp in the open position,

Pig. 3: top view of pig. 1 and 2"

On the cutter bar 1 of the cutting device - Pig. 2 - are by means of screw 2, the nut 3 and the spring washer 4, the knife blades 6; .8 of the fixed blade 5 and the movable blade 7 fixed »The knives 5j 7 are by means of rivets 10; 11 on the support body of the knife blades 6; 8 riveted. The movable blade 7 is printed on the fixed blade 5 with a plurality of clamps 12.

According to Pig. 1 and 2, the knife presser according to the invention consists of a curved clamp 12,. which is made of a single spring steel plate and a pus 13, a U-shaped back 14, a lid member 15 and a front part 16 has. The pusher 13 of the clamp 12 is fastened to the cutter bar 1 by a screw connection composed of screw 17, nut 18 and spring washer 19. On the side facing the movable blade 7 of the front part 16 of the clamp 12, a replaceable investment piece is secured by rivets 21 in order to reduce the friction and wear.

The clamp 12 and the U-shaped curved back 14 may also have other shapes and consist of several pieces, but it should be noted that the back 14 is made of a suitable material for receiving the elastic deformation material, preferably made of spring steel.

In the cover part 15, a slot 22 is provided, through which the adjusting screw 23 is passed and inserted into the threaded portion.

bore of the knife guide 9 is screwed. The adjusting screw 23 is secured by the nut 24. Between the screw head 25 and the cover part 15, a disc 26 is rotatably arranged, which has a wedge 27 on the side directed towards the lid part. With the help of this wedge, the clamp 12 or the entire pressing device is brought into an open or closed position. In the closed position, the wedge 27 sits in accordance with Pig. I on the lid member 15 and is locked against accidental twisting in the useful trained on the lid member 15 groove 28, while in the open position ^ according to Pig. engages in the slot 22 after appropriate rotation.

The advantages of the solution according to the invention are its extraordinarily simple structure and easy handling. The opening or closing of the device takes place by turning the disc 26, while for adjusting or for readjusting the blade distance after loosening the nut 24, the screw 23 is rotated. The adjusting screw 23 and the disc 26 can be easily adjusted independently of each other.

Claims (2)

Invention claim: 1. Knife pushbutton for pressing the movable blade in an alternately operating cutting device of a mower, which is in the form of a clamp, the foot of the clamp fixed by a screw on Hesserbalken and the front part of the terminal by a screw through a slot in the cover part is passed through the clamp and screwed into the knife bar, on which the movable knife is printed, characterized in that the back (14) of the clamp (12) between the lid part (15) and the foot (13) curved arcuately and on the screw shank of , Adjusting screw (23) between the screw head (25) and the cover part (15) a disc (26) is rotatably arranged on the lid to the part (15) side facing a wedge (27), Wherein the wedge (27) in closed Position of the knives (5, 7) on the cover part (15) locks and sits in the open position of the same in the slot (22) snaps » 2, knife presser according to item 1, characterized in that the entire clamp (12) is made of a single plate, preferably made of a spring steel plate. Knife presser according to item 1 or 2, characterized in that the wedge (27) in the closed position in. one in the lid part (1.5). formed groove (28) is locked · 4. Knife presser according to item 1 to 3 ₅ characterized by. that on the front part (16) of the clamp (12) a replaceable pad (20) is arranged.