DE1007095B - Triggering device for individual plow bodies on cultivation plows - Google Patents

Description

GERMAN

Release devices for individual plow bodies on mounted plows are available in different designs known. They have the purpose of overstressing the plow frames of mounted plows when they hit the plow body on a rigid obstacle, such as S adhesive stones in the ground and the like. To prevent by the Plow body can move backwards. For this purpose, the known plow bodies are arcuate Supports attached, which are rotatably mounted about a horizontal axis in the frame and on one forwardly extending straight extension of the arcuate beam are held. To the Holding the carrier is either a shear pin or a stop. A known design used as a stop a vertically movable hook, which is pressed upwards with a strong spring will. If the resistance of the soil exceeds z. B. when it hits the plow body If an adhesive stone in the ground has a certain force, the hook is pulled down so far that the Release the extension of the arch from the hook and the plow body can move backwards, This design has the disadvantage that the spring gives way long before the full permissible stress occurs because the pre-tensioned spring continues to tension as the resistance of the soil increases and a relatively long way is necessary before the extension of the plow body carrier can disengage from the hook. The result is that the plow body as a result of the different Soil resistance plays back and forth, depending on how the spring and the soil resistance are mutually exclusive To keep balance. This swinging of the plow body affects the working depth of the plow body. If the plow body moves back a little without notching, its share plane is inclined and the plow body penetrates deeper into the Floor a. When the ground becomes softer again, the spring pulls the carrier back upwards a stop, the plow body resumes its normal working position and opens again normal working depth.

Another embodiment leaves the plow body parallel to the direction of travel, with respect to the frame make a backward deceleration movement, compressed by the adjustable springs for so long until the straight part of the arcuate plow support over the stop pulled away and the plow body can swing backwards. This design also has the disadvantage of the spring-mounted plow body, which works unevenly with different soil resistance.

Another version allows the plow body to pivot back about a horizontal axis. Locked Release device for individual plow bodies on mounted plows

Applicant: Gebrüder Eberhardt, Ulm / Donau, Seestr. 1

Georg Eberhardt, Pfuhl, and Otto Grupp, Wiblingen, have been named as inventors

is the plow body at the front end of the beam with the help of a pawl, which by means of an inclined Surface pushes back a spring-loaded bolt guided on a horizontal surface, when the plow body encounters an obstacle. The disadvantage of this device is that it is not possible to convert the plow from a double furrow to a single furrow plow. It was also shown that the spring was not sufficient to hold the bolt immovable in the pawl, despite the pretension, so that the plow body followed different soil hardnesses during work and therefore unevenly went deep.

In contrast, the arrangement according to the invention has the advantage that the plow body in a special trained pawl is held immovably until the load on the plow body has reached a previously set amount. Only then does the pawl evade and release the plow body free so that he can move backwards. This ensures that the plow body is responsible for compliance the correct position that is decisive for the working depth and thus an undesired change the working depth is safely avoided.

Another advantage is that the plow body when pushing back the tractor and Plow can return to the working position without much effort and automatically in the The latch engages again.

The invention consists in that the bow carrying the plow body at its front end with a circular cam is provided, which is mounted in a known manner in the context of the plow Pawl engages, which has a circular arc-shaped stop surface offset to the axis of rotation of the pawl, such that the tangent in the end point of the circular arc of the stop surface to the through

709 506/39

Center of the cam going circle around the pivot axis of the arc at a small distance behind the axis of rotation of the pawl passes.

Another distinctive feature of refreshment

perpendicular position of the pawl 16, 16 'is offset to the rear relative to the axis 15, so that the tangent 20 to the circular arc 21 struck around the pivot axis 3 ″ through the center point 19 of the cam 6

tion consists in the convertibility of a two: 5 close behind the axis of rotation 15 "of the pawl 16, Iff in front

furrow plow in one for single furrow work. The rear plow body can with his Frame can be unscrewed from the front part of the plow frame. Furthermore, both plow

Pivot axis 3 "extends to the arc of the stop surface 18 drawn tangent 22 and to the a small rounding 23 follows.

This formation of the hook 17, 17 ', the pawl 16, 16' has the effect that the working pressure on the plow body 1, 1 ', which seeks to pivot it backwards and exerts a force in the cam 6, 6', in the axis of rotation 15 "generates a torque which is equal to the force from the working pressure times the distance I _{3 of} the tangent 20 from the axis of rotation 15". This torque tries to rotate the pawl 16, 16 'against the force of the pretensioned spring 14, 14'.

The long lever arm of the pawl 16, 16 'results in a large transmission ratio in relation to the small distance I ₃ , so that only a small pretensioning force of the spring 14, 14' is necessary. This bias of the spring 14, 14 'can with the help of

accompanies. For the term rear is the direction of travel authoritative.

The circular arc from which the stop surface 18 is formed ends at the point of intersection with the circular arc

bodies and their bows exchanged for each other, ίο 2ί. The stop surface 18 extends over a short distance, that is, the rear plow body can take the place of the in a straight line, which in the direction of the front by a certain amount to the rear
be screwed on offset. This has the advantage that the one provided with a long system
rear plow body is given a greater leg length 15
and leads better in the ground.

The subject of the application is shown in the drawings.

Figure 1 shows a side view of the latched front plow body;

Fig. 2 shows a side view of the disengaged rear plow body;

Fig. 3 shows the special design of the latch on a larger scale.

The triggering device is attached separately for each of the two plow bodies 1, 1 ', so that each Plow body can be released alone when it encounters an obstacle. The plow bodies 1, 1 'are on each a sheet 2, 2 'screwed to each one

Pivot axis 3, 3 ', can be adjusted in the frame between two 30 nuts ~ 12, 12', 13, 13 '. The little one Frame parts 4, 5 and 24, 25 out, to the rear straight line of the stop surface 18 has the consequence that the can swing out. At the front end there are plow bodies 1, 1 'also during the notching Arch 2, 2 'with a circular 6, 6' and movement of the pawl 16, 16 ', during which the spring strikes 7, 7 'provided and their end faces 8, 8' force is increased by pressing them together, beveled to the rear. On the side of the one 35 does not experience any noticeable change in his position. Da frame parts 4, 24 each has a support 9, 9 'against the load on the plow body in the ground screwed securely, in each of which one screw fluctuates strongly and is very close to the maximum of 10, 10 'screwed in and using the lock nut 11, 11' come within easy reach without the location of the is secured. The thread of the screws 10, 10 'is to be changed in the plow body. But it becomes the permissible one so long that two nuts 12, 12 'and 13, 13' reach the value of the load 40, then the pawl 16 loosens, have space on it, with the help of which the spring 14, 14 '16' suddenly comes out and gives the plow body to the Ausso Far pretensioned and this pretension secured pivot freely to the rear.

as it is necessary to allow the plow body 1, 1 'together with the arch 2, 2' to go too early

To prevent triggering of the plow body 1, 1 '. can move back enough, is that

In the front support 9, 9 ', which continues the leg, are screwed laterally and the upper frame parts 4, 5, three or four holes 28 are provided in the lever arm of the pawl 16, 16' cantilevered outwards, spacing I _x = I ₂ , which the pivot axes 3 "
and 15 "for the arch 2 and the pawl 16 of the
front plow body 1 can accommodate. When working with two grooves, arch 2 and pawl 16 of the 50
front plow body 1 in the front two
Holes 28 stored (Fig. 1), for single-furrow work
the front plow body 1 together with the release device 9 to 17 is removed from the frame 4, 5
and the long rear plow 55
body 1 'removed from the rear frame part 24, 25 and after removing the rear frame part
24, 25 from the front frame part 4, 5 and through
Loosen the screws 26, 27 in the front
Frame 4, 5 inserted using 60
of the rear hole 28. Also the support 9 'as well as the

and provided with a recess in which the screw 10, 10 'is guided.

Claims (4)

Claims ^ Claw 16 'are implemented using the two rear holes 28 with the spacing; screws 3 'and 15' are used to fasten these parts. The pawl 16, 16 'is designed as a hook 17 on the shorter lever arm, in which the circular cam 6, 6' of the arch 2, 2 'is inserted. The hook 17 has a circular arc-shaped stop surface 18, the center point 19 of which in the locked state and approximately 1. Release device for individual plow bodies on mounted plows to protect against overload of the frame, with the plow body swinging out to the rear about a horizontal transverse axis can after a two-armed latch automatically counter to the action of an adjustable The spring has disengaged, characterized in that the one carrying the plow body (1, 1 ') Arch (2, 2 ') is provided at its front end with a circular cam (6, 6'), which in a pawl (16, 16 ') mounted in a known manner in the frame (4, 5 or 24, 25) of the plow engages, the one circular arc-shaped stop surface offset to the rear relative to the axis of rotation (15 ") of the pawl (18), such that the tangent (20) at the end point of the circular arc of the stop surface (18) to the circle (21) passing through the center point (19) of the cam (6, 6 ') around the Pivot axis (3 ") of the sheet (2, 2 ') in small 10 Distance (Z ₃ ) behind the axis of rotation (15 ") of the pawl (16, 16 ') passes. 2. Tripping device according to claim 1, characterized in that the stop surface (18) the pawl (16, 16 ') forming a circular arc (18) at its intersection with the circle (21) merges into a very short straight line passing through the pivot axis (3 ") of the plow body (1, 1 '), which is followed by a small rounding circle (23). 3. Trip device according to claim 1 and 2, characterized in that the two-armed The pawl (16, 16 ') protrudes outward with its upper, longer lever arm and the one on the Axis of rotation (3 ") of the arch (2, 2 ') carrying the plow body (1, 1') on the side of the frame 4, 5 or 24.25) rigidly attached support (9.9 ') for the compression spring (14, 14 ') is provided with a thread in which the leading the spring Screw (10, 10 ') is screwed in and secured by counter nut (11, 11'), the Screw (10, 10 ') with its head end in a recess in the upper lever arm of the pawl (16, 16 ') lies. 4. Triggering device according to claim 1 to 3, characterized in that for converting a double furrow plow into a single furrow plow, the front plow body (1) including the triggering device and arch (2) after loosening the screws (3, 15) from the frame parts (4, 5) removed and the rear plow body (I ') with arch (2') after dismantling the rear frame part (24, 25) from the front frame part (4, 5) by loosening the screws (26, 27) between the front frame parts (4, 5 ) pushed, but is screwed together with the parts of the release device (9 'to 17') by a certain amount (I ₂ ) to the rear on the front frame part (4, 5). Considered publications:
German patent specification No. 533 528, 311 361. 1 sheet of drawings © 709 506/391 4.57