DE1115073B - Arrangement for attaching agricultural equipment to tractors with three-point hitching devices - Google Patents

Description

In patent 1,051,045 there is an arrangement for attaching full or angular reversible plows Tractors with three-point linkage are described in which the lower control arms are operated using the hydraulic Digging device can be used to adjust the working depth and its location above the ground is adjusted according to the pressure force occurring in the upper link and the plow front frame or the coupling of the plow is designed at the same time so that the real or ideal point around the the coupling is always swiveled by the pulling force when there is no upper link when plowing is above the line of pull of the plow. This arrangement has the advantage that even then in the upper There is pressure on the handlebars when the weight of the plow is large or the center of gravity is far back or both is the case. The pressure load on the upper link is a prerequisite for working the control described, d. H. for regulating the working depth.

In order to obtain the required position of the pivot point according to the main patent, according to the proposal of the patent mentioned, the coupling carrying the leg over handlebars with the lower handlebars and these handlebars or the coupling itself are connected to the tractor by an additional handlebar, to get such a high pivot point. There are further funds provided, although one Allow pivoting movement of the coupling around the desired axis, but on the other hand prevent the Plow under the action of its weight, e.g. B. when lifting or in the transport position, a Can perform swivel movement under the action of its own weight.

The invention aims to provide the means necessary for solving the problem of the main patent, i. H. the split paddock and the additional handlebars to be designed at the same time so that turning with them the reversible plow is feasible, either in the form of the known drop rotation, in which by Limited buckling of the coupling either part of the potential energy of the excavated Plow is used for turning or a well-known spring is tensioned, which then turns of the plow. For this purpose, the arrangement of the main patent is designed so that the Coupling with the lower links of the three-point linkage connecting means or with the Tractor connecting means simultaneously with the rotation of the plow under the influence of its own weight or a spring tensioned when lifting the plow executing means so coupled arrangement

for attaching agricultural implements
on tractors with three-point hitching devices

Addendum to patent 1,051,045

Applicant:

Rabewerk Heinrich Clausing,
Linne via Bohmte (District Osnabrück)

Ferdinand Zach, Bad Essen,
has been named as the inventor

are that they turn the plow under the action of its own weight or the spring only so long prevent how the latch of the rotating device executing the share change is inserted.

Several exemplary embodiments of the invention are described below with reference to the drawing, the same reference numerals being used for identical parts in all exemplary embodiments. In all of the figures, D ₀ , D ₁ , D ₂ and D ₃ each designate the same pivot points, of which two coincide in some figures and the pivot point D ₃ is missing in one figure. D ₀ denotes the pivot point, the position of which in relation to the resistance line is determined for whether the upper link is subjected to compression or traction during plowing, i.e. D ₀ denotes the point around which the plow would pivot under the influence of soil resistance if the upper link was missing . D ₁ is the guide point of the plow and thus also its ideal pivot point to the tractor during plowing. It should be noted that the plow is carried by the tractor, ie it cannot move downwards. However, if the ground is very heavy and the weight is correspondingly low, it can move upwards. So you have to make sure that the point D _{1 is} always below the resistance line. The plow also swivels around point D ₁ if the working depth is changed by the control hydraulics during plowing. D ₂ is the point around which the plow is rotated relative to the tractor when lifting. D ₃ is the pivot to

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that the plow is swiveled after the lock has been released during the halyard rotation. These Pivoting movement is also associated with a lowering of the center of gravity. The one that becomes free potential energy is used to turn the plow.

In Fig. 1 the tractor is marked with 1, the lower link with 3 hinged at 2, the upper link with 4 and the coupling carrying the plow grinder 5 is denoted by 6. The joint between this and that upper handlebar is denoted by 7. This itself is hinged at 8 on a piston 9, which is on a Spring and the control device of the hydraulic lifting device 32 shown in Fig. 1 acts. This includes the linkage designated 10, which engages the lower links 3 and is coupled to the device 32 via the angle lever 33. In the axis of rotation 11 of the lower Handlebars 3 are handlebars 12 articulated. You are at 15 through a further link 13 with the tractor 1 articulated at 14. At the coupling 6, a double-armed lever 17 is articulated in the joint 16, the once at 15 is connected to the links 12 and on the other hand in the joint 18 carries a bumper 19, the one schematically shown rotating device 20 of the rotatably mounted and the ploughshare carrying Grindels 5 affected. This rotating device is locked by a detent, not shown, d. i.e., the lever 17 forms a rigid part of the coupling 6 and of the leg 5 as long as the blockage exists.

The resistance force acting on the plow body and composed of the soil resistance and the plow weight tries _{to rotate the coupling 6 about the pivot point 15, ie the pivot point D 0} , ie the link 4 is always subjected to pressure. Fig. 1 shows the working position of the plow. In the raised position, the locking of the plunger 19 is retained. It is only triggered before lowering. The plow shaft 5 pivots with the coupling 6 around the pivot point D ₃ , which is the intersection between the line of action that goes through points 15 and 16, and the line of action of the upper link 4. The potential energy released is used to rotate the Plow, ie used to change shares. The pivot points D ₁ and D ₂ coincide and lie at the intersection of the lines of action of the links 4 and 13.

In the exemplary embodiment according to FIG. 2, the coupling 6 carrying the plow shaft 5 is connected to the lower links 3 by means of relatively short links 12. At 21, an angle lever with the arms 22 and 23 is articulated on the coupling. The end 34 of the arm 22 is connected to the tractor 1 by a length-adjustable handlebar 24. The plunger 19 of the rotating device 20 is articulated on the arm 23. As is locked Leg movement of the angle lever 22, 23 can not occur, so the point 34 6 during plowing a fixed point of the coupling member In this configuration, the coupling is obtained a high-level conceptual point of rotation D ₀ to the plow under the influence the resistance force seeks to pivot with the upper link omitted, that is, the upper link 4 is always subject to pressure. If the locking of the rotating device 20 is released in the raised position, the leg 5 pivots downward under the action of the plow weight, namely around the ideal pivot point designated _{by D 3.} This point is much more favorable than point D ₃ in Fig. 1, which is only shown as an example because it is a greater distance from the center of gravity of the plow. The falling movement is used to rotate the leg, it can be limited by the stop 31 shown in dashed lines on the coupling 6. The stop also relieves the load on the links 4 and 24 during transport after the plow has been turned and before it is used.

In the exemplary embodiment in FIG. 3, the link 24 is replaced by a chain 25 which engages the coupling 6 directly at 21. Of the lever 22, 23 only the arm 23 is retained and is hinged to the coupling 6 at 26, that is to say at the same point at which the short links 12 also engage the coupling 6. These themselves have an additional arm 27 which serves as an abutment for arm 23 when excavating, ie prevents the plow from falling off when excavating, but on the other hand _{allows pivoting about the pivot point designated D 0} in both directions. The device according to Fig. 3 has the advantage that the chain 25 only allows tensile stresses, that is, unlike the handlebar 24, it cannot be subjected to pressure when lifting during transport and when lowering the plow. Another advantage is that the pivot point D _{2 is} very far forward, that is, the center of gravity of the plow does not need to be raised as high as in the embodiments according to Fig. 1 and 2, so the lifting work is relatively low. The arm 27 only comes to rest when it is lifted out, whereupon the chain 25 is relaxed and sags.

In the exemplary embodiment according to FIG. 4, the arm 27 of the link 12 articulated on the coupling 6 at 26 is directly connected to the chain 25. At 21 a lever 22, 23 corresponding to the lever is hinged to the coupling 6 again. The arm 22 is connected to the end of the arm 27 by a chain 28. Of the two chains, only one is tensioned, the chain 25 when plowing, the chain 28 when lifting, during transport and during the fall rotation. The embodiment according to Fig. 4 once has the advantages of that of Fig. 3, but compared to this a very favorable position of the pivot point D ₃ , since it has a very large distance from the center of gravity of the tractor.

The embodiment of Fig. 5 is similar to that of Fig. 4. The coupling 6 is connected to the tractor 1 by a rigid link 24 which is adjustable in length. The lever 12, 27, which is mounted at 26 on the coupling 6, is connected via a spring 29 to the double-armed lever 22, 23, which is coupled to the plunger 19 of the rotating device 20. When the device is lifted out, the spring 29 is tensioned. After releasing the detent of the rotating device 20, it performs the rotary movement of the plow leg, that is, it is not the potential energy of the lifted plow weight that is used for rotation, but that of the spring 29 tensioned during the lifting process. The lifting device is designed so that the tensioning of the spring only starts when the plow has been lifted out of the ground. Since there is no drop rotation, the pivot point D ₃ is missing in this figure.

In the embodiment of Fig. 6, the double-armed lever 22, 23 is directly at the end of the Arm 27 of the handlebars 12 is articulated, furthermore the arm 22 is connected to the tractor by a handlebar 30

tied together. As before, the end of the Annes 23 is coupled to the ram 19 of the rotating device. This design is advantageous when a very high pivot point D ₀ with a simultaneously favorable position of the pivot point D _{3 is} desired.

In Fig. 1, the link 13 does not need to be coupled directly in the joint, it can also be connected be connected to a point of the handlebar 12 or the double-armed lever. The same applies to the lever in Fig. 3, the articulation point of which on the coupling 6 does not have to coincide with the articulation point 26. It would also be possible to articulate the handlebar 23 at one point on the handlebar 12.

In Fig. 1, the joint 15 is a double joint. In general, double joints are through Reduction of two joints is achieved by reducing the distance between the two joints to zero belittles. Of course, you can insert two joints instead of a double joint. this applies generally for all double joints occurring in the exemplary embodiments. As is well known, you can with all trinary or quarternary members two joints or three with quarternary members combine to form a double or triple joint.

Claims (7)

PATENT CLAIMS: 1. Arrangement for attaching full and angled reversible plows to tractors with three-point attachment devices, in which the lower links are used to adjust the working depth with the aid of the hydraulic lifting device, their position above the ground is adjusted according to the pressure force occurring in the upper link and the plow front frame or the coupling of the reversible plows is designed so that even with heavy plows and / or with a center of gravity far to the rear, the pivot point around which the coupling would be pivoted if the upper link were missing is above the line of pulling force of the plow, according to patent 1,051 045, characterized in that the means (12) connecting the coupling (6) to the lower links (3) or the means (13, 24, 30, 25) connecting them to the tractor simultaneously with the rotation of the plow Influence of its own weight or a spring tensioned when lifting the plow executing means are coupled so that they only prevent the plow from turning under the effect of its own weight or the spring as long as the latch of the turning device executing the share change is inserted. 2. Arrangement according to claim 1, characterized in that at the lower end of the coupling (6) a double-armed lever (17) is articulated, one arm of which is linked to the lower one Controls (3) of the three-point linkage leading control arms (12) and on the other hand directly or indirectly through a handlebar (13) with the tractor and its other arm with the rotating device (20) is articulated (Fig. 1). 3. Arrangement according to claim 1, characterized in that a double-armed on the coupling (6) Lever (22, 23) is articulated, one arm of which via a link (24) with the tractor and the other arm of which is connected to the rotating device (19, 20) (Fig. 2). 4. Arrangement according to claim 1, characterized in that the coupling (6) by a chain (25) with the tractor and through a lever (23) articulated on the coupling with the rotating device (19, 20) is connected and the lower link (3) connecting to the coupling Link (12) an arm (27) to support the coupling connecting the rotating device (19, 20) Arm (29) has (Fig. 3). 5. Arrangement according to claim 1, characterized in that an arm (27) of the coupling (6) with the lower links (3) connecting link (12) by a chain (25) with the Tractor and by another chain (28) with an arm (22) of one articulated to the paddock Angle lever is connected, the other arm (23) is coupled to the rotating device (20) (Fig. 4). 6. Arrangement according to claim 1, characterized in that at the end of an arm (27) of the the coupling with the lower links (3) connecting link (12) a double-armed lever (22, 23) is articulated, one arm of which is connected to the tractor by a handlebar and the other Arm is connected to the rotating device (19, 20) (Fig. 6). 7. Arrangement according to claim 1, characterized in that the coupling (6) has a Handlebar (24) with the tractor and via a handlebar (12) with the lower handlebars (3) of the Three-point linkage connected and an angle lever (22, 23) is mounted on the coupling, which once with the rotating device (19, 20) and on the other hand via a spring (29) with an arm (27) of the Handlebar (12) is coupled (Fig. 5). Considered publications:
Austrian patent specification No. 183 256. 1 sheet of drawings © 109 708/104 10.61