HU188208B - Device for automatic controlling the advancing speed of self-propelled agricultural machines - Google Patents

Abstract

The present invention discloses an automatic control of the advance of a combine harvester, which is so designed that each combine harvester having a manually adjustable speed of advance can subsequently be equipped in a simple way with the control device according to the invention, the regulating distances transmitted by the hand lever being varied by the control device, without the position of the regulating hand lever changing thereby during the control operation.

Description

CLAAS OHG, Harsewinkel, DE (54) EQUIPMENT FOR SELF-ADJUSTING THE RIGHT SPEED OF AGRICULTURAL MACHINERY (57)

Apparatus for automatically controlling the travel speed of self-propelled agricultural machines, in particular self-propelled harvester-threshing machines, depending on the torque of the feed auger and the loss of grain, has become known in the past, but its operation reliability is difficult and difficult to handle. These are connected to the throttle lever by means of an actuator element for adjusting the hydraulic drive pump control lever or the continuously adjustable V-belt drive control lever.

According to an embodiment of the invention, a diverting system having a variable gear ratio is provided between the transmission element and the actuator lever, wherein the variable gear is formed by an actuator-controlled actuator.

Not only is it simple and safe to operate, but it is cheap and also simple to build.

... 188,208

The present invention relates to an apparatus for automatically controlling the travel speed of a self-propelled agricultural machine, in particular a self-propelled harvester-threshing machine, depending on the torque and grain loss of the feed auger of the machine. With these machines, the throttle lever allows the operator or driver of the machine to disable the device for automatic control.

A device for automatically controlling the travel speed of self-propelled harvester-threshing machines has long been known, for example, in U.S. Patent No. 3,023,606. German Patent Specification. There is also known a mechanical adjusting device for controlling the hydraulic drive or infinitely adjustable belt drive of harvester threshing machines by means of electric or hydromechanical means. A friction limiter is provided here which enables the driver to disarm the control device.

It is also known to use hydraulic or electrical means instead of mechanical position transmitting elements, which can be operated either manually or by means of a controller.

The disadvantage of the former system is that manual disarming requires an unexpectedly high amount of force which, in the event of danger, may surprise the driver and prevent him from doing the right thing. The disadvantage of non-mechanical transmission devices, on the other hand, is that their complete operational reliability and, in particular, the precise adjustment of the zero position require complicated tools and adjustments which are difficult to accomplish. Their repair is also rather cumbersome, in some cases impossible.

SUMMARY OF THE INVENTION In addition to the drawbacks of the known solutions, the object of the present invention is to provide a device for automatically controlling the speed of travel of self-propelled agricultural machinery which is simple, durable, non-malfunctioning and easy to install on existing agricultural machines.

According to a further development of the invention, a diverting system having a variable gear ratio is provided between the intermediate element and the actuating arm, wherein the variable gear is formed by an actuator controlled by a regulator.

Preferably, the diverting system is provided with a lever, one end of which is hinged to the machine and the other end is hinged in the transmission element and the lever has a positioning bearing for its connection to the adjusting arm. The adjusting lever can be connected to a changing bearing location by means of an adjusting rod.

Advantageously, the hoist has a rake as a moving bearing position, in which a pin connected to the adjusting rod is guided and an adjusting member for changing the position of the pin in the ridge is connected to the adjusting rod.

Alternatively, two pivot arms are connected to the hoist as a releasable bearing location, which is connected by an articulated rectangular joint, the adjusting rod being articulated to the joint, and the actuating member being connected to one of the articulated arms.

Preferably also, the frictional force acting on the throttle member and the intermediate bearing of time greater than ⁵ the deflection system, the actuator lever and the actuator mounting room.

Further details of the invention will be illustrated with reference to the accompanying drawing in connection with an exemplary embodiment. In the drawing, FIG. 1 is a schematic diagram of a preferred embodiment of the apparatus of the invention,

Figure 2 is a schematic diagram of another embodiment.

In Fig. 1, reference numeral 1 denotes the gas lever ^{15 in} the cab of a harvester-threshing machine (not shown), which is connected via an intermediate element 2 to one end of a lever 3. The transmitting element 2 is formed here as a bow. The other end of the lever 3 is pivotally mounted in a bracket 4 fixed to the machine.

The elevator 3 itself has a curved bar 5 with a pin 6 guiding it. This pin 6 is firmly connected to an adjusting rod 7 which in turn connects at one end to the pump adjusting lever 8 of the hydraulic drive motor of the machine (not shown) and at the other end to the actuating member 9 consisting of a hydraulic cylinder 25 and pistons. The actuator member 9 is pivotally engaging in a bracket 10.

The pin 6 in Fig. 1 moves according to the respective position of the piston rod 11 of the actuator 9.

3θ is pointed downwards or upwards from a central position, whereby the effective length between the pin 6 and the bearing point of the hoist 3 in the bracket 4 changes without changing the position of the throttle lever 1 itself. The actuator 9 provides the necessary signals

It is fed by wire 12 from an electronic controller 13, fed by wire 14 and 15, which is proportional to the loss of mesh on the screen and shaker, and by wire 16, a signal proportional to the instant torque of the feed screw. The controller 13 immediately compares these inputs to the values specified for the maximum allowable grain loss and torque and, in the event of a deviation, orders the actuator 9 to be actuated. The actuator 9 operates until the measured torque and the determined grain loss are below the maximum allowable limit.

The torsional torque of the feed screw is then determined in a manner known per se by means of two plates 17 which are pivotable relative to one another and have through holes. When the machine is stationary, one of the holes 18 of one of the plates 17 coincides with one of the holes 18 of the other plate 17 (such a measurement of the torque is well known, so it is not necessary to describe it further here).

By means of preselection switch 20, initial values can be entered into the controller 13 according to the characteristics of the crop to be harvested and the characteristics of the soil conditions involved. This means, for example, a preselected velocity which the machine achieves when the throttle I θθ is fully advanced and only differs from it when the torque or grain loss exceeds the allowable maximum input to the regulator 13. In the case of regulation, the position of the throttle lever I does not change because the apparatus is configured such that the throttle lever 1, the transmission element 2 and. 188,208 r

the friction of the lever 3 at the bearing points is greater than the friction of the pump adjusting lever 8, the adjusting rod 7 and the actuating member 9 at the bearing points. This achieves that, regardless of the actual position of the actuator 9, the zero position of the throttle lever 1 coincides with the zero position of the pump adjusting lever 8.

Figure 2 shows another embodiment of mechanics. Instead of the pivot pin 6 and the lever 3 in the backstage 5, and the adjusting rod 7 embedded therein, the pivoting rod 7 'is mounted on a clamp 21 at the opposite end of the pump adjusting lever 8', at its end being pivotally connected. The swing arms 22 and 23 are themselves pivotally connected to the lever 3 '. An actuator 9 'is connected to one of the swing arms 22 and 23, here exemplified by the swing arm 23, to vary the effective lifting length.

Instead of the pin 6 and the bar 5 shown in Fig. 1, in the embodiment shown in Fig. 2, two clamps 21 held by two pivot arms 22 and 23 are used. The significance of this is that the scissors 5 may, under certain conditions, be loaded with dirt, which in certain circumstances may make the operation of the apparatus more difficult.

Patent claims

Claims (6)

1. Apparatus for automatically controlling the travel speed of self-propelled agricultural machinery, in particular self-propelled harvester-threshing machines, depending on the torque of the feed auger and the loss of grain, a diverting system having a variable gear ratio is provided between the transmission element (2) and the adjusting lever (8, 8 '), wherein the variable gear ratio is controlled by a regulator (13). with relay actuator (9, 9 '). An embodiment of the device according to claim 1, characterized in that the deflection system is provided with a lever (3, 3 '), one end of which is attached to the machine (4, 4') and the other end of the transmission element (2). , 2 ') is pivotally mounted and the lever (3, 3') has a positioning bearing for attachment to the adjusting lever (8, 8 '). An embodiment of the device according to claim 1 or 2, characterized in that the adjusting arm (8, 8 ') is connected to a positioning bearing by means of an adjusting rod (7, 7'). 4. Device according to any one of claims 1 to 3, characterized in that the hoist (3) has an angle (5) for changing the position of the bearing, in which a pin (6) connected to the adjusting rod (7) is guided and to the adjusting rod (7). an adjusting member (9) for changing the position of the bar (5) is connected. 5. Device according to any one of claims 1 to 5, characterized in that two swing arms (22, 23) are connected to the hoist (8 ') as a releasable bearing location, which is connected by a joint (21) forming an articulated rectangle, the adjusting rod (7') and the actuator (9 ') is connected to one of the pivot arms (23). 6. An embodiment of the device according to any one of claims 1 to 3, characterized in that the frictional force in the bearings of the gas arm (I) and the transmission element (2, 2 ') is greater than the deflection system, the adjusting lever (8, 8') and the actuating member (9, 9 ') frictional force in its bearings. 2 page drawing -3 ..... 188,208 NSO ₄ : A 01 D 47/12 oo -4188 208 Published by the National Office for Inventions