FR2731580A1 - SELF-PROPELLED COMBINE HARVESTER WITH REEL SPEED CONTROL DEVICE - Google Patents

Abstract

The present invention describes a combine harvester in which the rotational speed of the reel is automatically adjusted as a function of the forward speed of the combine harvester and taking into account the inertia of the harvest product, and certainly so that, when the forward speed of the combine is restricted, the feed of the reel is greater and that when said speed is high, the feed of the reel is minimal or nonexistent.

Description

The self-propelled combine The present invention relates to a

  self-propelled combine with a control motor and a reel that can be actuated by the control motor, the speed of the reel can be changed according to

  the forward speed of the combine.

  In combine harvester cutting devices, the reel must ensure the reception of the crop product as well as its transport to the feed drum 1 0, so that a product flow is created and the threshing device of the combine is continuously supplied. With regard to the use of the reel, the principle "as much as necessary - as little as possible" is applied, in order to minimize losses from threshing in the area of the cutting device. This means that the height of the reel (entry of the rabbi into the harvest) and its speed of rotation must be such that, on the one hand, the product of the harvest is not used unnecessarily and, on the other hand, that there is nevertheless a continuous flow of product. In practice, it has also proved useful to choose a circumferential speed of the reel which is slightly higher than the speed

  progress of the combine.

  In order to help the operator of the combine, who has to constantly keep an eye on many functions, in his work, there are on the market combines in which the rotational speed of the reel adapted

  automatically at forward speed.

  Known systems provide for an adaptation of the speed of rotation as a function of the proportion factor. This means that the expected circumferential speed of the

  reel is formed from the actual forward speed of the harvester

  threshing machine, multiplied by the proportion factor. Said factor can be changed by

  the driver depending on the harvest conditions encountered during the journey.

  We also know that instead of setting the proportion factor, we set a constant advance. This means that the predicted circumferential speed of the reel is formed from the actual forward speed of the combine.

increased by the advance.

  The two known systems do not however function optimally, since in both cases the inertia of the crop product is not taken into account. The object of the present invention therefore consists in designing a self-propelled combine of the type described in more detail below, which regulates the rotational speed of the reel as a function of the forward speed of the combine as in depending on the inertia of the crop product. In accordance with the invention, the object is achieved in so far as the combine has an electronic memory control device provided with a detector intended to record the speed of rotation of the reel, said speed of rotation of the reel can be controlled. as a function of the forward speed of the combine following a characteristic curve stored in the memory. Said curve is in

  further designed so that when the forward speed of the harvester-

  threshing machine is restricted, the reel advance is greater and when said speed is high, the advance is smaller or nonexistent, since the flow of the crop product, in the case of high forward speed, is supported by the inertia of

harvest product.

  In the other embodiment of the invention, the characteristic curve stored in the memory can be moved up or down parallel to itself

in the coordinate system.

  According to another characteristic of the invention, several curves are stored in the memory, among which the operator of the combine can choose according to the actual harvesting conditions. Below, the invention must be explained in more detail by means of an exemplary embodiment and two figures of this example presented schematically. Said figures represent respectively: fig.1 the side view of the front part of a self-propelled combine S; fig.2 an exemplary characteristic curve presented in various positions displaced parallel to each other according to the speed of

walking and reel speed.

  1 describes the front part of a self-propelled combine on the inclined transport channel (2) from which the cutting device 3 is arranged so that it can be raised and lowered. We know that a reel 4, whose rotation speed is adjustable, belongs to the cutting device 3. On the axis 5 of the reel 4 is placed a tachometer sensor 6 whose values are constantly stored in a computer 7 provided an integrated database. In addition, data is constantly integrated into the computer 7 by a tachometer sensor 8 connected to the axle 9 before the combine. The computer 7 is connected to the control console 10. If the combine operator changes the speed of the combine motor from the control console 10, said modified forward speed is incorporated into the computer 7 by means of the tachometer sensor 8. In computer 7 a comparison is made between the chosen forward speed of the combine harvester 1 chosen by the operator of said combine harvester and the momentary speed of the reel. If the speed coefficients fixed by the characteristic curve do not correspond, the command of the

  reel is modified accordingly by computer 7.

  FIG. 2 shows a characteristic curve 11 in the coordinate system in the case of which it can be seen that said characteristic curve 11 has three zones for which the coefficients between the speed of the reel and the running speed of the combine harvester differ . Furthermore, said FIG. 2 shows that the characteristic curve 11 can be slid parallel to itself and then occupies for example one of the positions 11 'to 11 "' shown. Of course, it is possible, instead of just one curve characteristic 11 can be slid, to store several characteristic curves in the computer 7 so that the operator of the combine harvester can each time adjust the optimum tachometric coefficients between the rotational speed of the reel and the forward speed of the

  combine harvester in case of different harvesting conditions.

Claims (4)

  1. Self-propelled combine with a control motor and a reel which can be driven by the control motor, the reel rotation speed can be modified according to the forward speed of the combine , characterized in that the combine (1) is provided with an electronic memory control device (7) having a sensor (6) for recording the speed of rotation of the reel, said speed of rotation being able to be   i 0 controlled, depending on the forward speed of the harvester-   threshing machine (1), along a characteristic curve (11) stored in the memory (7). 2. Self-propelled combine harvester according to claim 1, characterized in 1 5 that the course of the characteristic curve (11) is such that, via   of the computer (7, when the forward speed of the harvester-   threshing machine is restricted, the reel is given a strong lead and, when the priority speed is high, the reel receives a lesser lead or does not not receive at all.   3. Self-propelled combine according to either of the claims   1 and 2, characterized in that the characteristic curve (11) stored in the memory (7) can be moved up or down parallel to   itself in the coordinate system.   4. Self-propelled combine according to either of the claims   1 to 3, characterized in that several characteristic curves (11) are stored in the computer (7) from which the operator of the combine can choose according to the harvesting conditions effective.