DE1214925B - Drive device for a toggle slewing gear on rotary plows - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. α .:

AOIb

German class: 45 a - 3/42

Number:
File number:
Registration date:
Display day:

1214925
P32496III / 45a
August 30, 1963
April 21, 1966

The invention relates to a drive device for a toggle lever mechanism on reversible plows, in which between the one mounted on the rear coupling of the three-point linkage on a horizontal transverse axis, in the end position on the rear coupling adjacent actuating lever and the outside of the Plow rotation axis lying traction point a connecting rod is articulated and in which the upper Handlebars pivotable about a horizontal transverse axis arranged on the rear coupling Rocker arm is hinged, which is in the working position by a releasable locking lever with the rear Coupling is connected.

With such a toggle slewing mechanism, the connecting rod moves three-dimensionally when the plow is turned in space from one end position to the other, with the operating lever in both end positions on the rear coupling of the three-point linkage and the plow without a separate locking device and holds in the work-oriented rotational position without significant play in the joints.

With the invention, the object is to be achieved, the drive device for such in its construction to train simple and advantageous toggle slewing gear so that the excavated device inherent potential energy is used to turn the plow. For those with falling The center of gravity of the working slewing gears is the upper link of the three-point linkage due to the weight of the plow stressed on train and this tensile force is transmitted by lever to the plow rotation axis.

However, this is not easily possible with a toggle slewing mechanism of the type mentioned at the beginning, because the tensile force of the upper link only occurs during the first half of the rotation of the axis of rotation may take effect. During the other half of the rotary movement, the one that is rotated brings the one in rotation Part of the inherent inertial force pushes the plow into its end position.

In order to solve this problem, a drive device is known for such toggle-lever slewing gears, in which the upper link is articulated on one lever arm of a two-armed rocker arm mounted on the rear coupling, while the other lever arm is connected to the one-armed operating lever of the toggle-lever slewing gear with the interposition of a hinge rod is that approximately at half the plow rotation, the direction of the force exerted by the operating lever on the plow frame (pull or pressure) changes. In this case, the rotary movement of the plow drive device for a toggle lever mechanism is inevitable
on reversible plows

Applicant:

Lemken K. G. plow factory, Alpen (Ndrh.)

Named as inventor:
Theo van Laak, Altkaikar

frame carried out from the starting position to the end position.

However, it has been shown that in many cases the effort for such a force direction changing multi-articulated transmission is not worthwhile because the inertia force of the rotating parts in the

ao generally sufficient to bring the plow after reaching the middle position tu in the other end position. In addition, the known turning device has the disadvantage that the rocker arm must be of short length because of its assignment to the operating lever and thus little room for the articulation of the upper link is available on the rocker arm, so that it is not possible to have several articulation points for the upper arm provide sufficient clearances on the rocker arm.

With the drive device. According to the invention, the object is achieved in that the Rocker arm by means of a pawl with the upper lever arm of the two-armed in a known manner Actuating lever is connected and a spring engages on the pawl, which by the relative movement is stretched between the coupling and the rocker arm and thereby disengages the pawl.

This creates an interaction in collaboration the operating lever and the pawl achieved. After lifting the device and triggering it the known locking lever is generated by the weight of the lifted plow Pull the rocker arm swiveled forward in the upper handlebar, and the operating lever by means of the pawl pivoted, causing a rotation of the plow by 90 °. After reaching this position or shortly before reaching this position, the rocker arm rests against a limit stop so that the pawl no longer transmits any tensile force to the actuating lever. The spring connected to the latch is now cocked and lifts the pawl from the upper lever arm of the operating lever,

609 559 / ΤΪ3

Claims (1)

3 4 so that the plow according to its inherent horizontal one. Transverse axis 9 on the rear coupling 4 Mass force can turn into the other end position, where articulated. At the rear of the belt 4 is at the operating lever back to its original position in the upper part of the two-armed angle lever 10 to position returned. After lowering and on a horizontal transverse axis 11 pivotably mounted, When the device is placed on the ground, the rocker arm 5 is used. The connecting rod engages with the lower lever arm 10 ' automatically back into the locking position, and 12 by means of a universal joint 13, whose the pawl can again on the other end of the actuation on a crank arm 14 of the Lay the lever because the tension of the spring is canceled and the support axis 15 is firmly connected to the coupling 4 is. There is the further advantage that the length rotatable, the work tools 16 in opposite of the rocker arm is not limited, so that enough io position supporting plow frame 17 also means Space for the arrangement of several articulation points for a universal joint 18 engages. The upper one, after the upper handlebar is present. rear bent lever arm 10 "of the actuation In drive devices for reversible plows, at hebeis 10 carries a pin 19 around which a pawl which a locking device 20 engages for each working position, which is attached to the rocker arm 8 around the pivot pin is provided, the problem arises of the timely 15 21 is pivotally mounted. One in the working position Release of the gear part causing the rotation, relieved or almost relieved of pressure, engages also on. The solutions known for this purpose are connected to an approach 23, while the other end of the th the transmission part in question is connected to the coupling 4 by a spring 22. The tilt 90 ° rotation of the plow and leave the remaining lever 8 and the rear coupling 4 in the Arlichen Part of the rotation caused by the moment of inertia 20 beitsposition of the pawl 24 in the locked position gedes complete rotating plow; however, the hold remains. The pawl 24 is on the rocker arm 8 to relevant gear part rotatably mounted during the work of the PfIu pin 25 and engages around the pin ges in the force-transmitting parts of the turning device 26 of the rear coupling 4. The pawl 24 is with a device switched on, so that an additional game is fitted in lever arm 24 'which extends forward the joints occurs. Also with these known 25 and as a hand lever for triggering the pawl 24 from drive devices is the place where the rocker arm is formed. The hand lever 24 'can be omitted if for the arrangement of several articulation points with the end of the lever 24 'with a stop 27 reaching out Distances for the upper link is seen, which is in the range of motion of the upper restricts. ■ Handlebar 7 is located so that after lifting the device In the case of very heavy, multi-furrow plows, the pawl 24 is released in 30 and thus the rotary In some cases, the bearing friction when rotating the movement of the rotating frame 17 is initiated. The plow is so large that the potential energy of the an- Fig. 2 shows the device in the raised position lifted plow is insufficient to accommodate the mass of the frame just before the end of the 90 ° rotation To accelerate the plow from the rest position, 17. The pawl 20 is still under tension, that the plow with certainty over the dead center position 35 In Fig. 3 is the dead center position of the slewing gear got. At the beginning, the static friction must be reached in which moment the rocker arm 4 starts Bearing overcome and also, if necessary, a stop 29 'of the coupling 4 has arrived and an eccentric center of gravity raised thus exert no tensile force on the pin 19 will. can. However, the spring 22 is during the first In order to be sure that in this case too a full part of the rotation has been tensioned and now pulls sufficient The initial acceleration of the pawl 20 to be rotated from the area of the pin 19, To achieve part, is according to a further invention so that the plow frame 17 according to the granted him Proposal suggested that between the rear head-living force the rotary motion in the other pel and the rocker arm an energy storage device, e.g. in the end position. This position is in Form of a compression spring, which is shown at 45 in Fig. 4, is switched on. As soon as the device is lowered and Setting down the plow is cocked. In the eye - the coulter tips of the tools 16 on the ground Look where the locking lever touches down when the plow is raised, the upper link 7 is under pressure the rotary movement is released, is responded to immediately and brings the rocker arm 8 back into the the force stored in the energy storage device is free and under the position according to FIG. 1, in which case that of the force supports the acceleration of the part to be rotated. At 50 of the relaxed spring 22, the pawl 20 is relieved again It is known to engage over the pin 19 in automatic reversible plows. the potential energy of the plow in a spring to support the rotary movement of the plow storage, around the stored energy for turning frame 17 is between each stop of the hindes To use plow. direct coupling 4 and the rocker arm 8 a compression spring The invention is used in the drawing in an Aus 55 28, which is in the position according to F i g, 1 ge management example shown, namely show tense. As soon as the locking lever 24 is released, Fig. 1 a single-point reversible plow with a supports the force of the spring 28 the rotation of the plow Drive device for a toggle lever mechanism in frame 17. The one passed through the spring 28 Side view, bolt 29 serves to control the tilting movement of the tilting Fi g. 2, 3 and 4 positions of the drive device 60 to limit 8. But it can also, as in during the rotary movement in side view. F i g. 2 to 4 shown, a special stop 29 ' According to FIG. 1 are provided on the tractor frame 1 at the paddock 4, hinged two lower links 2 .an one around .. _u a vertical axis 3 of the rear coupling 4 in a Fatentansprucne: Slide guide 5 swiveling rail 6 on both sides 65 1st drive device for a toggle lever articulated to the longitudinal center plane of the tractor 1. The work on reversible plows, in which between the to upper centrally arranged link 7 is from the tractor to the rear coupling of the three-point linkage frame 1 led to a rocker arm 8, which is mounted around a horizontal transverse axis in the End position on the rear coupling adjacent operating lever and the outside of the plow rotation axis lying traction point a connecting rod is articulated and in which the upper Handlebars pivotable about a horizontal transverse axis arranged on the rear coupling 5 Rocker arm is articulated, which is in the working position by a releasable locking lever with the is connected to the rear paddock, characterized in that that the rocker arm (8) by means of a pawl (20) with the upper lever arm (10 ") of the two-armed in a known manner Actuating lever (10) is connected and a spring (22) engages the pawl (20), which by the Relative movement between coupling (4) and rocker arm (8) is tensioned and thereby the pawl (20) notches. 2. toggle pivot mechanism according to claim 1, characterized in that the upper arm (10 ") of the actuating lever (10) is bent backwards. 3. toggle pivot mechanism, in particular according to claim 1 or 2, characterized in that an energy storage device (28) is switched on between the rear coupling (4) and the rocker arm (8), which is loaded when setting down the plow. 4. toggle slewing mechanism according to claim 3, characterized in that the bolt (29) for Guiding of the energy store designed as a spring (28) as a limit stop for the rocker arm (8) is used. Considered publications:
German Patent Specification No. 1029 183,1115 072; German Auslegeschrift No. 1123 501;
German utility model No. 1 745 057,
844 165;
French patent specification No. 1,298,906. 1 sheet of drawings 609 559/113 4.66 © Bundesdruckerei Berlin