DE1053848B - Arrangement for re-threshing in a threshing machine - Google Patents

Description

GERMAN

The invention relates to a machine for threshing agricultural crops. Such a machine consists of the thresher, d. H. the actual threshing device to which the harvested crop is fed is, a separator or cleaner, to which the threshing yield or threshing that has been freed from the straw (Grains, chaff and other small items) transported from the thresher and through the Grain is separated out to be conveyed out of the machine, a re-threshing device, to which the threshing is fed from the cleaner, and a device to remove the grain and other products the re-threshing process to be fed back to the cleaner or separator.

It is known to attach an exhaustor for re-threshing, the wings of which are provided with pins and act as a threshing device in conjunction with teeth of the housing. However, since this well-known Arrangement bulky due to the space requirements of such a device, therefore making the overall structure more expensive acts, a compact overall structure is achieved according to the invention by acting as a re-threshing device a known axial thresher with blower discharge of the goods is provided.

An embodiment of the invention is described below and illustrated by the drawings.

Fig. 1 is a side view of a combine harvester with the parts partially drawn or in section broken away to show the internal components schematically;

Figure 2 is an enlarged section through the re-harvester along the section line 2-2 in FIG. 1;

Fig. 3 is a top plan view of the lower half of the re-harvester housing and

FIG. 4 is a section along the line 4-4 in FIG. 3.

The drawn embodiment relates. on a combine harvester of known design, which is used for Attachment to a tractor is intended.

The re-threshing 28 according to the invention is intended to thresh the threshing from the separator, namely the shaker 19, again. The grain and the other products of the re-threshing process are returned through an outer channel 29 and an outlet opening 30 into the threshing box C and onto the collector, namely the grain trough 15. The channel 29 is relatively short. The tractor wheel 9 is moved so far outwards that a small lateral clearance remains between its pneumatic tire and the channel; As a result, the channel has a sufficient distance from the wheel body, as shown in FIG. 1.

Details of the re-harvester 28 are shown in FIGS. 2, 3 and 4.

As FIG. 1 shows, the post-arrangement shown there is for re-threshing
in a threshing machine

Applicant:

Mass ey-Harris-Fergus on (Manufacturing)

Limited,

Stretford, Manchester, Lancashire
(Great Britain)

Representative: Dipl.-Ing. F. Thieleke, patent attorney,
Braunschweig, Wendentorwall 1 a

Claimed priority:
Great Britain 19 January 1956

Jerzy Belkowski, Earlsdon, Coventry, Warwickshire,

and Walter Stanley Hockey,

Stretton-on-Dunsmore, Warwickshire (UK), have been named as inventors

thresher installed just below the separator 19 by being attached to the underside of the combine harvester housing or threshing box C in the transverse direction. The working parts shown in Figure 2 are mainly enclosed in a re-harvester housing; this consists of an upper half 40, which belongs to the combine construction, the side walls of which are indicated in FIGS. 1 and 2 with 32 and 34, and a lower half 41, which is attached to the upper. Half is detachably attached. This upper half has an inlet opening 40 b into which the chamber 27 at the rear end of the shaker 19 opens.

The working part of the re-harvester 28 is a rotor with a shaft 42, the ends of which are in bearings 43, 44 rest. The shaft 42 is driven by a belt pulley 45 or the like via a slip clutch 46 driven, which serves as a safeguard to prevent the re-harvester from getting stuck. The rotor contains a Auger 47, which is mounted on shaft 42 and in the re-threshing housing below the inlet opening 40 & is accommodated to receive the threshing falling from the chamber 27. The Rotor a number of beaters 48, which sit radially on the shaft 42 and are designed as wings, as Fig. 2 shows. These beaters perform the re-threshing work in cooperation with teeth 49

809 787/176

Claims (7)

formed in the inner surface of the lower case half 41. In the example, the clubs are positioned so that their wing effect does not move the threshing (grain and other material) along the inside of the housing. For this purpose, the club wings are all placed in planes B-B, which are perpendicular to the shaft axis. The required movement of the material is brought about solely by a fan edge 50, which is also part of the rotor; it is mounted on the shaft 42 and enclosed in a fan housing (air chamber) 51, 52. This air chamber opens tangentially into the channel 29. It is designed in two parts; its upper part 51 belongs with the upper half 40 of the re-threshing housing to the construction of the threshing box C, while its lower part 52 is a continuation of the lower housing half 41. The fan wheel consists of radial arms 53, on each of which a rectangular wing 53 a sits. The blower sucks air, together with the re-threshed material, from the inlet end of the re-threshing housing into the air chamber 51, 52 and drives it in a stream of air through the channel 29 and the outlet opening 30. The re-threshed material is driven through the outlet opening 30 to the grain trough 15. The air sucked through the secondary threshing housing is increased by additional air which is sucked in through auxiliary air slots 54 in the fan housing 51, 52. It has been found that this additional air gives a better satisfactory conveyance and helps to prevent clogging of the re-thresher. However, should the re-thresher become blocked, it is easy to remove the lower half of the re-thresher and fan housing, which forms a single piece, in order to remove the blockage. In Fig. 1, easily removable brackets are indicated schematically at 55, which hold the lower housing half 41, 52 in their position. If desired, one or more of the clubs 48 can be rotated so that their wings are at an angle in the plane 0-0. As a result, they counteract the conveyance caused by the air from the inlet 40 b into the fan housing 51, 52 in order to lengthen the re-threshing effect. Optionally, you can also adjust one or more of the club wings in the opposite direction at an angle: then they support the air supply in order to shorten the re-threshing. The rackets can (at 48 a) be screwed to the shaft 42 so that they are adjustable in angle; but they can also be attached to the shaft in a non-adjustable manner. The air flow passes through the duct outlet 30 in the transverse direction, while the main air flow A goes through the cleaner 19 backwards and upwards. In order to limit mutual interference between the two air flows to a minimum, the outlet opening 30 is preferably arranged above the grain trough 15; because with this arrangement the two air flows are practically separated from one another. In addition, the rear end of the grain trough provides a shielding effect between the two air flows. In a combine harvester attached to the tractor, especially if there is a possibility of a collision between the channel 29 and the tractor wheel 9, considerations of the available space mean that the outer channel 29 and its outlet opening 30 cannot be placed further forward than Fig 1 shows: the grain and the other products of re-threshing can therefore only be placed on the rear end of the grain trough 15. In the case of a combine harvester with its own drive, however, where no collision between an outer channel 29 and a tractor wheel 9 is possible, it is easily possible to abandon the re-threshing products further forward. Patent claims: 1. Arrangement for Nachdresdhen the cleaning device of a threshing machine unthreshed goods passing through, characterized in that an on as re-threshing device known Axialdresdher with blower discharge of the goods is provided. 2. Arrangement according to claim 1, characterized in that the. from re-harvester to Separator returning line (29) opens into the shaken grain trough (15). 3. Arrangement according to claim 1 or 2, characterized in that the beaters (48) of the JNTachdreschers are wings of a shaft (42) on which they can be adjusted so that their planes BB are perpendicular to the shaft axis or at such an angle, that the inclined wings promote or inhibit the passage of the threshing through the re-threshing housing (40, 41). 4. Arrangement according to one of claims 1 to 3, characterized in that the fan housing (51, 52) has an inlet (54) for additional air to the air flow through the discharge channel (29) strengthen. 5. Arrangement according to one of the preceding claims, characterized in that the Nachtheschergehäuse aus.einem upper and a lower part (40, 41) and that the lower Part (41; Fig. 3 and 4) with teeth (49, 49 α) is formed, which with the re-threshing process the thugs. (48) work together. 6. Arrangement according to one of claims 2 to S, in which the grain trough is moved back and forth above the separator sieve blown with air, - thereby gekennzei anticipates that the line (29) leading back from the re-thresher to the separator transversely through the main thresher housing (C) to a height (30) above the reciprocating Grain trough (15) is performed. 7. Arrangement according to one of the preceding claims, characterized by a slip clutch (46) in the drive of the re-threshing rotor. Considered publications:
German patent specifications No. 316 673, 540 256. 1 sheet of drawings © 809 787/176 3.59 DRAWINGS SHEET ISSUE DATE: MARCH 26, 1959 KL.45e 7/52 INTERNAT. KL. AOIf DRAWINGS SHEET ISSUE DATE: MARCH 26, 1959 DAS 105384 «KL.45e 7/52 INTERNAT. KL. AOIf DRAWINGS SHEET 1 ISSUE DATE: MARCH 26, 1959 THE 1033 848 KL.45e 7/52 INTERNAT. KL. A 01 f Fl G. 3 41 BOi 787/176