FR2760170A1 - Combine harvester with cutter, feed screw and slope conveyor - Google Patents

Abstract

The separator for foreign objects consists of at least one active conveyor element (3) operating across the direction of travel. The conveyor element is positioned in a housing (5) open towards the gap between the slope conveyor (1) and the thresher (2).The housing has at least one outlet (8) for the foreign bodies (7).The active conveyor element is in the form of a conveyor screw (4) driven by a drive mechanism (6) which can be regulated. The pitch of the two halves of the conveyor screw run in contrary directions

Description

Combine harvester with a body removal device

  The invention relates to a combine harvester comprising a

  cutting deck, a feed screw and an inclined elevator which

  from harvesting to a threshing mechanism, as well as a

  under the threshing mechanism and a device for eliminating

  a rotationally rotatable body of foreign bodies which is disposed between the end-side exit of the inclined elevator and the threshing mechanism and the axis of rotation of which is parallel to the deflection rollers of the inclined elevator. When harvesting cereals, it is inevitable that foreign bodies, including stones present on the surface of the field, are carried along with the stems. However, it must be prevented that these foreign bodies reach the threshing mechanism, to prevent deterioration thereof. This means that said foreign bodies must be removed before the entry of the rods into the threshing mechanism. The stones are normally relatively bulky, it is known to collect foreign bodies for example in a collection device arranged in a kind of drawer. Usually, the mechanism of

  threshing is in the form of a threshing drum driven in rol-

  tion. Elements urged by the springs are associated with the threshing drum, which elements can recoil thus allow the evacuation of foreign bodies. In all these embodiments, the combine operator must empty the collected stones from time to time.

in the receiver device.

  It is still known to have a godet wheel rotated below the slot between the inclined elevator and the threshing drum. Because of their relatively large body weight

  foreigners fall into the bucket wheel and are eliminated. A way of realizing

  This type of disclosure is disclosed, for example, in US Pat. No. 3,433,233 ().

  In these embodiments, it is inevitable that the foreign bodies to be removed carry with them stalks, ears and grains of cereals since these can not be supported in any manner whatsoever. Starting from an embodiment with a device for eliminating foreign bodies rotated, the object of the invention is to improve in a simple manner on the plhn of the construction the dispositil 'elimination of foreign bodies d a combine harvester

indicated in the introduction.

  This object is achieved by the fact that the device for eliminating foreign bodies is formed of at least one active transport element which acts transversely to the direction of travel and is arranged in a housing

  open towards the slot formed between the inclined elevator and the

  threshing device, which housing has at least one outlet opening

  for foreign bodies. In accordance with a refinement of the invention

  tion, the active transport element may be formed of one or more conveyor (s) belt or chain, but also for example at least one

worm transportor.

  The screw of the worm conveyor may be of known current type and may comprise either helically wound nets or inclined disks. Regardless of the particular arrangement of the screw conveyor without lfin, a support is created for the product in admitted rods so that the risk of driving said product by the foreign bodies (which falls into the screw conveyor is considerably decreased, when The auger conveyor is arranged such that the foreign bodies which fall into it are transported up to 3 (the exit opening and leave the combine harvester). 'one way

  which will be described in more detail below.

  Advantageously, the worm can be driven by

  using an adjustable drive mechanism. The training mechanism

  For example, an electric motor or a hydrau-

  lic. Control is provided by the driver via control elements in the driver's cab. The conductcur can

  then depending on the characteristics of the field, set the rotation speed

  which, for example, can be between one lap per minute and one

  Rotations per minute. Insofar as the chaimp does not carry stones.

  the auger conveyor can even be stopped.

  Given the high flows of a harvest-

  the width of the inclined elevator can be relativelment important, it is planned to avoid long strokes of transport for

  foreign bodies, adopt directions of step or inclination oppo) -

  1) for the screw threads or inclined discs of the two screw halves.

  Thus the foreign bodies are transported only a distance that corresponds substantially to half the width of the inclined elevator. It is particularly advantageous that the directions of pitch or inclination

  screw threads or discs are opposed so that the trans-

  foreign bodies take place from the middle to the outside. In this case there is provided an outlet opening for the foreign bodies in the region of each of the lateral ends of the half-shell shaped housing. This prevents foreign objects from being blocked when the quantity of foreign bodies is large. So that the foreign bodies are brought back into

  ) the flow of rejected products on the spot, it is planned to dispose of

  active transport elements above the loading end of the

  preparation table. Foreign bodies can then switch

  tif removal of foreign bodies in the cleaning device Or on the preparation table. The foreign bodies to be removed in this case leave the combine by means of the preparation table and

cleaning box.

  The invention is described in detail in the following Cnl referring to the accompanying drawings. These represent:

  FIG. 1 is a partial schematic side view of a

  3) according to the invention and FIG. 2, a view from above corresponding to FIG.

smaller scale.

  In the combine harvester according to the invention, which is

  not shown in full here, a worm conveyor 3.

  The screw 4 of which is divided in half in the middle is arranged below the slot formed between the inclined elevator I and the threshing drum 2 placed next to the inclined elevator. The worm 4 is mounted in a housing 5

  it is a sort of half-shell, which is open upward. c'cst-

  ie towards the slot already mentioned. Lat screw without lfin 4 is driven by an adjustable drive mechanism 6 which is UNDER the

  the shape of an electric motor or a hydraulic motor. The worm 4-

  is arranged in such a way that the step directions of the tufts of the two

  Screw connections are opposite and in the embodiment shown.

  the foreign bodies 7 that fall into the screw conveyor without binding 3

  are routed to the outside. Exit openings 8 lead to

  in the lateral end regions of the casing 5, which open

  are arranged in such a way that foreign bodies can escape

  by them. Below the worm conveyor 3 is arranged a preparation table 9, which can be set in motion by means of a

  oscillating mechanism 10. The loading end of the preparation table

  9 is disposed below the mentioned slot. Following the

  5, the combine is provided with the known separation device 11. Below the threshing drum 2 there is arranged a countercenter 12 (2) for safely bringing the threshing product

separation device 11.

  Figures I and 2 show that foreign bodies 7 train

  the inclined elevator I are brought by their own weight into the

  worm gear 3 and from there are transported to the outside by the screw

  endless 4 and fall on the preparation table 9 through the openings of the SoI--

  8. From there they are rejected on the field The rods transported by the elevator

  inclined torus I are supported on the screw threads, which

  effectively their training.

Claims (8)

  1. Combine harvester comprising a cutting deck, a feed screw and an inclined elevator which brings the harvesting product to a   threshing mechanism, as well as a preparation table available beyond   UNDER the threshing mechanism and a rotationally rotatable foreign-body removal device which is disposed between the output-side end of the inclined elevator and the threshing mechanism and whose axis of rotation is parallel to the idler rollers. the inclined elevator, characterized in that the foreign substance removal device is composed of at least one active transport element (3) which acts transversely to the running direction and is arranged in a housing (5) which is open towards the slot formed between the inclined elevator (1) and the threshing device (2) and which has at least one outlet opening (8) for the foreign bodies (7).   Combine harvester according to Claim 1, characterized in that the active transport element (3) consists of a worm (4).   3. Combine harvester according to claim 1 or 2, characterized   the fact that the active transport element (3) can be driven by means of   an adjustable drive mechanism (6).   2 () 4. Combine harvester according to claim 2 or 3.   rised by the fact that the pitch directions of the threads of the two screw halves   the auger without flin (4) are opposed.   Combine harvester according to Claim 4, characterized in that the pitch directions of the threads of the screw without end (4) are   in such a way that transport takes place from the middle to the outside.CII-   6. Combine harvester according to any one of the claims   1 to 5, characterized by the milk which is provided for each end region of a transport element (3), in the housing (5), each time attu   minus an exit opening (8) for the foreign bodies (7).   ) 7. Combine harvester according to any one of the   1 to 6, characterized in that the worm conveyor (3) is arranged above the loading end of the preparation table (9).   8. Combine harvester according to one of the specifications of the l-Cvcndica-   lions I to 7, characterized in that the foreign bodies (7) are unloaded   by the device for removing foreign bodies on the net device.   or on the preparation table (9) of the combine harvester.