DE1582255C - Safety device for a mower - Google Patents

Claims (3)

1 2 The invention relates to a safety drawing and is described in more detail below Device for a laterally arranged on the tractor. It shows nice mower, the cutter bar with its F i g. 1 a perspective view of the measuring Inner shoe around an axis in the direction of travel pivotally attached to a hinge piece 5 tractor, is that cooperates with a shear pin and F i g. 2 an enlarged section through the sol around the longitudinal axis of a system-fixed pipe break point, can be pivoted. F i g. 3 corresponds to FIG. 1, only with the In the event of a difference on the rear three-point frame that the parts are in the separated state of the tractor-mounted mower, it is relatively ίο after breakage of the shear pin,
moderately easy, if uneven ground occurs. The cutter bar 1 of the mower is articulated with its or other obstacles by suitable mechanical inner shoe 2 on the hinge 3 on the axis niche facilities or by maneuvers AA ' . The hinge piece, in turn, is to prevent damage or breakage of the mower about the axis XX 'of a support tube 5 or its parts. It is difficult to mount the 15 in such a way that it can rotate so that the two mentioned problems are perpendicular to each other when the axes are attached to the side of the tractor. Finally, th mowers, where the structural effort to also the support tube 5 at its knife-prevention of damage, experience has shown that the end facing away from the bar 1 at a fixed part 6 of the can be considerable. Hauled tractor, being a horizontal one It is known that such a laterally attached 20 axis BB 'is pivotable. The inclination ten mower according to the German utility model position of the inner shoe and thus the knife 1 830 635, the cutter bar with its inner shoe bar 1 is achieved by a system that under about an axis lying in the direction of travel pivoting other from one by means of a bolt 12 in one To be movably attached to a hinge piece, the hand lever 11, which is attached to the tube 5, is seated cooperates with a shear pin and consists of around 25. The pivoting movement of the hand lever is The longitudinal axis of a pipe that is fixed to the system is pivoted onto the hinge piece 3 by means of a linkage 13 can be. Disadvantageous with this known output. The linkage is on the lever side through a The guide is that when the knife pin 14 hits, a pin 15 on the hinge side bar on uneven ground or other obstacles. One attached to the shaft of the lever 11 nissen the inner shoe of the hinge piece in 3 ° bolt 17 is in the upper notches 18 of the rigid with then shear off a sheet metal connected to the pipe and click into place Linchpin can be completely solved, in this way several positions of the lever 11 relative the hinge pin breaks. To be able to define this behavior _{for pipe 5.} The brings with it a risk of accident. the linkage 13 with the lever 11 connecting The invention provides a nominal 35 bolt 14 known per se, its required freedom of movement breaking point, which in the event of inadmissibly high stresses caused by a kidney-shaped the inner shoe of the knife bar from the slot 19. should separate the tractor-side suspension device. The parts described so far are The object of the invention is to make a predetermined breaking point more or less conventional parts, to be provided in the form of a shear pin at one point, 40 as generally used in known mowers. which find a swiveling up turn after shearing off the shear pin. What is new, however, is the tendency ken of the cutter bar allowed, so that this one of the cutter bar enabling arrangement the unevenness of the ground or obstacles in the ground free-securing part, which, as shown in FIG. 2, is enlarged comes, but without the cutter bar shown by the i _m section, a shear pin 15 is the Hanging device is released or other connecting rods 13 connects to the hinge piece 3, binding agents can be damaged. So that this pen can shear each time, e.g. B. This object is achieved according to the invention when the cutter bar encounters a ground obstacle, that the shear pin is perpendicular to the hole in the linkage 13 with a bush 21 cutter bar pivotally receiving axis lined with hardened steel, while a hinge piece passes through and with The bushing 22, which is similar to the support tube 50, is seated in the upper part of the hinge with the interposition of a linkage as a target piece 3. The breaking point designed as a screw bolt interacts. This achieves the effect that the shear pin 15 is held by a nut 23 with a counter-fit after the shear pin has been sheared off as a result of the bottom nut 24.
Obstacles or uneven ground and swiveling up the cutter bar the connection of the 55 patent claims:
The hinge piece with the support tube in the high- 1. Safety device for a laterally pivoted position is retained. Tractor arranged mower, the knife in an expedient embodiment of the invention is bar with its inner shoe around an in motion the shear pin both in the linkage and in the direction pivotable on the hinge piece surrounded by a bushing, 60 a hinge piece is attached, which is attached to one of the advantageous Way from a harder work shear pin cooperates and around the longitudinal axis is made of material than the shear pin itself. A system-fixed tube can be pivoted through this sheathing of the relatively thin shear, characterized in that the pin has a relatively low surface pressure shear pin (15) perpendicular to the cutter bar under high loads, without the bolt connection losing the predetermined breaking property in this 65 (1) pivotable receiving axis (A-A '), the hinge piece (3) penetrates and goes with the supporting tube (5) with the interposition of a linkage An embodiment of the invention is in the (13) cooperates as a predetermined breaking point. 2. Safety device according to claim 1, characterized in that the shear pin (15) in the Linkage (13) is surrounded by a bushing (21) in the hinge piece (3) by a bushing (22). 3. Safety device according to claims 1 and 2, characterized in that the sockets (21, 22) are made of a harder material than the shear pin (15). 1 sheet of drawings