GB2024594A - Crop cleaning device for combine harvesters - Google Patents

Crop cleaning device for combine harvesters Download PDF

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Publication number
GB2024594A
GB2024594A GB7923671A GB7923671A GB2024594A GB 2024594 A GB2024594 A GB 2024594A GB 7923671 A GB7923671 A GB 7923671A GB 7923671 A GB7923671 A GB 7923671A GB 2024594 A GB2024594 A GB 2024594A
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GB
United Kingdom
Prior art keywords
screen
conveyor belt
housing
belt
separating
Prior art date
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Granted
Application number
GB7923671A
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GB2024594B (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Deere and Co
Original Assignee
Deere and Co
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Filing date
Publication date
Application filed by Deere and Co filed Critical Deere and Co
Publication of GB2024594A publication Critical patent/GB2024594A/en
Application granted granted Critical
Publication of GB2024594B publication Critical patent/GB2024594B/en
Expired legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01F—PROCESSING OF HARVESTED PRODUCE; HAY OR STRAW PRESSES; DEVICES FOR STORING AGRICULTURAL OR HORTICULTURAL PRODUCE
    • A01F12/00—Parts or details of threshing apparatus
    • A01F12/44—Grain cleaners; Grain separators
    • A01F12/444—Fanning means
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01F—PROCESSING OF HARVESTED PRODUCE; HAY OR STRAW PRESSES; DEVICES FOR STORING AGRICULTURAL OR HORTICULTURAL PRODUCE
    • A01F7/00—Threshing apparatus
    • A01F7/02—Threshing apparatus with rotating tools
    • A01F7/06—Threshing apparatus with rotating tools with axles in line with the feeding direction ; Axial threshing machines

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  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Threshing Machine Elements (AREA)
  • Combines (AREA)

Abstract

Separated crop material falls from an axial flow threshing and separating apparatus 10 (drum 14 in housing 12) on to a cleaning screen 24 in the form of a foraminous conveyor belt carrying chaff to the rear, assisted by a blower 26. Crop falling through the downstream, separating basket part 22 of the housing 12 is fed by a return device in the form of a conveyor 30, forwardly to the middle of the screen 24. The conveyor 30 may also be foraminous to assist cleaning. It and/or the screen 24 can be vertically vibrated to assist cleaning. <IMAGE>

Description

SPECIFICATION Cleaning device for combine harvesters The invention relates to a cleaning device for a combine harvester having an axial flow threshing and separating drum in a threshing and separating housing, below which there is provided a screen, which may be a drivable screen belt. One such device is described in German patent specification No. 2 015 584 and has a screen belt disposed below a threshing and separating drum housing. The crop material which falls from the downstream end of the housing cannot always be sufficiently cleaning as the crop material remains on the screen belt for an excessively short period of time.
According to the present invention there is provided a cleaning device for combine harvesters having an axial flow threshing and separating drum arranged in a threshing and separating housing, below which there is provided a cleaning screen, comprising a return device between the housing (10) and the screen and arranged to feed crop material falling through the downstream end of the housing back to a region of the screen under a more upstream part of the housing.
The return device makes it possible for in particu lathe crop material which is separated out at the downstream end of the housing to be conducted into the middle region of the screen so that the crop material can be more intensively cleaned, as it remains on the surface of the screen for a longer period of time. The return device can be a conveyor belt. Using a conveyor belt in the region of the downstream end of the threshing and cleaning device ensures that this crop material is also intensively cleaned. The conveyor belt can be arranged horizontally at an inclined angle.
In order to provide for an even more intensive cleaning action, it is advantageous for the conveyor belt and/or the screen to be mounted for oscillating movement. A very good cleaning action is also achieved if the conveyor belt is in the form of a screen belt whose through openings are somewhat larger than the through openings in the separating screen. It is also desirable for the conveyor belt to be controllable in respect of its speed and to be reversible in direction.
The invention is described in greater detail hereinafter with reference to an embodiment which is shown by way of examples in the sole Figure of the drawing.
Athreshing and separating apparatus 10 extends in the longitudinal direction of a combine harvester and includes a housing 12 in which a drum 14 is arranged. The drum comprises a forward, threshing portion 16 and a rearward, separating portion 18.
The threshing portion 16 is coaxially connected to the separating portion 18. The housing 10 has a threshing and separating basket 20 with numerous through openings 22. Part of the crop material which is threshed out in the housing 10 falls on to the forward part of a screen belt 24 which is driven by means of a drive arrangement (not shown). Cleaning air is blown over the screen belt 24 by means of an axial blower 26. The crop material which issues from the separating portion 18 is predominantly first passed on to a return device 28 which can be formed from a conveyor belt 30. Instead of the conveyor belt 30, it is also possible to use an inclined chute which conducts the crop material into the middle region of the screen belt 24. The conveyor belt 30 is driven in the opposite direction to the direction of movement of the conveyor belt 24.The conveyor belt 30 may be arranged so asto extend horizontally with respect to the surface on which the combine harvester stands, or it may be so arranged as to extend in a forwardly inclined direction, towards the screen belt 24.
The top run of the screen belt 24 may be accommodated for example in a horizontally extending guide member which, in the embodiment illustrated, is in the form of a guide rail 32 which is open towards the top run of the screen belt 24. For this purpose, the screen belt 24 may have slide rollers at its edge, the rollers being guided in the guide rail 32.
The top run of the conveyor belt 30 may also be guided in a similar guide rail. It is also possible for the two guide rails to be joined together by way of two parallelogram linkage assemblies and to be driven by way of a drive means, so that in this way, besides the horizontal direction of movement of the top run of the conveyor belt 30 and of the screen belt 24 respectively, the top runs may also be set in oscillation in a vertical direction. In this way it is possible to provide for an even more intensive cleaning action forthe crop material.
1. A cleaning device for combine harvesters having an axial flow threshing and separating drum arranged in a threshing and separating housing, below which there is provided a cleaning screen, comprising a return device between the housing (10) and the screen and arranged to feed crop material falling through the downstream end of the housing back to a region of the screen under a more upstream part of the housing.
2. A device according to claim 1, wherein the screen is a belt screen whose top run moves in the downstream direction.
3. A device according to claim 1 or 2, wherein the return device comprises a conveyor belt whose rearward end lies beneath the downstream end of the housing and whose forward end extends over the middle region of the screen.
4. A device according to claim 3, wherein the conveyor belt extends horizontally.
5. A device according to claim 3, wherein the conveyor belt inclined to the horizontal to the surface on which the combine harvester stands.
6. A device according to any of claims 2 to 5, wherein the conveyor belt and/or the screen is mounted for oscillating motion.
7. A device according to any of claims 2 to 6, wherein the conveyor belt is in the form of a screen belt whose openings are larger than the openings through the said separating screen.
8. A device according to any of claims 2 to 7, wherein the speed of the conveyor belt is adjustable.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (9)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Cleaning device for combine harvesters The invention relates to a cleaning device for a combine harvester having an axial flow threshing and separating drum in a threshing and separating housing, below which there is provided a screen, which may be a drivable screen belt. One such device is described in German patent specification No. 2 015 584 and has a screen belt disposed below a threshing and separating drum housing. The crop material which falls from the downstream end of the housing cannot always be sufficiently cleaning as the crop material remains on the screen belt for an excessively short period of time. According to the present invention there is provided a cleaning device for combine harvesters having an axial flow threshing and separating drum arranged in a threshing and separating housing, below which there is provided a cleaning screen, comprising a return device between the housing (10) and the screen and arranged to feed crop material falling through the downstream end of the housing back to a region of the screen under a more upstream part of the housing. The return device makes it possible for in particu lathe crop material which is separated out at the downstream end of the housing to be conducted into the middle region of the screen so that the crop material can be more intensively cleaned, as it remains on the surface of the screen for a longer period of time. The return device can be a conveyor belt. Using a conveyor belt in the region of the downstream end of the threshing and cleaning device ensures that this crop material is also intensively cleaned. The conveyor belt can be arranged horizontally at an inclined angle. In order to provide for an even more intensive cleaning action, it is advantageous for the conveyor belt and/or the screen to be mounted for oscillating movement. A very good cleaning action is also achieved if the conveyor belt is in the form of a screen belt whose through openings are somewhat larger than the through openings in the separating screen. It is also desirable for the conveyor belt to be controllable in respect of its speed and to be reversible in direction. The invention is described in greater detail hereinafter with reference to an embodiment which is shown by way of examples in the sole Figure of the drawing. Athreshing and separating apparatus 10 extends in the longitudinal direction of a combine harvester and includes a housing 12 in which a drum 14 is arranged. The drum comprises a forward, threshing portion 16 and a rearward, separating portion 18. The threshing portion 16 is coaxially connected to the separating portion 18. The housing 10 has a threshing and separating basket 20 with numerous through openings 22. Part of the crop material which is threshed out in the housing 10 falls on to the forward part of a screen belt 24 which is driven by means of a drive arrangement (not shown). Cleaning air is blown over the screen belt 24 by means of an axial blower 26. The crop material which issues from the separating portion 18 is predominantly first passed on to a return device 28 which can be formed from a conveyor belt 30. Instead of the conveyor belt 30, it is also possible to use an inclined chute which conducts the crop material into the middle region of the screen belt 24. The conveyor belt 30 is driven in the opposite direction to the direction of movement of the conveyor belt 24.The conveyor belt 30 may be arranged so asto extend horizontally with respect to the surface on which the combine harvester stands, or it may be so arranged as to extend in a forwardly inclined direction, towards the screen belt 24. The top run of the screen belt 24 may be accommodated for example in a horizontally extending guide member which, in the embodiment illustrated, is in the form of a guide rail 32 which is open towards the top run of the screen belt 24. For this purpose, the screen belt 24 may have slide rollers at its edge, the rollers being guided in the guide rail 32. The top run of the conveyor belt 30 may also be guided in a similar guide rail. It is also possible for the two guide rails to be joined together by way of two parallelogram linkage assemblies and to be driven by way of a drive means, so that in this way, besides the horizontal direction of movement of the top run of the conveyor belt 30 and of the screen belt 24 respectively, the top runs may also be set in oscillation in a vertical direction. In this way it is possible to provide for an even more intensive cleaning action forthe crop material. CLAIMS
1. A cleaning device for combine harvesters having an axial flow threshing and separating drum arranged in a threshing and separating housing, below which there is provided a cleaning screen, comprising a return device between the housing (10) and the screen and arranged to feed crop material falling through the downstream end of the housing back to a region of the screen under a more upstream part of the housing.
2. A device according to claim 1, wherein the screen is a belt screen whose top run moves in the downstream direction.
3. A device according to claim 1 or 2, wherein the return device comprises a conveyor belt whose rearward end lies beneath the downstream end of the housing and whose forward end extends over the middle region of the screen.
4. A device according to claim 3, wherein the conveyor belt extends horizontally.
5. A device according to claim 3, wherein the conveyor belt inclined to the horizontal to the surface on which the combine harvester stands.
6. A device according to any of claims 2 to 5, wherein the conveyor belt and/or the screen is mounted for oscillating motion.
7. A device according to any of claims 2 to 6, wherein the conveyor belt is in the form of a screen belt whose openings are larger than the openings through the said separating screen.
8. A device according to any of claims 2 to 7, wherein the speed of the conveyor belt is adjustable.
9. A device according to any of claims 2 to 8, wherein the conveyor belt is reversible.
GB7923671A 1978-07-08 1979-07-06 Crop cleaning device for combine harvesters Expired GB2024594B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19782830103 DE2830103C2 (en) 1978-07-08 1978-07-08 Cleaning device for combine harvesters

Publications (2)

Publication Number Publication Date
GB2024594A true GB2024594A (en) 1980-01-16
GB2024594B GB2024594B (en) 1982-08-18

Family

ID=6043897

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7923671A Expired GB2024594B (en) 1978-07-08 1979-07-06 Crop cleaning device for combine harvesters

Country Status (3)

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DE (1) DE2830103C2 (en)
FR (1) FR2430186A1 (en)
GB (1) GB2024594B (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2651088A1 (en) * 1989-08-30 1991-03-01 Proizv Ob Tag Thresher particularly for combine harvesters
EP1495668A3 (en) * 2003-07-05 2005-04-20 Deere & Company Axial flow separator device
WO2015062965A1 (en) * 2013-10-31 2015-05-07 Agco A/S Grain separating apparatus in a combine harvester
US9864497B2 (en) 2014-09-26 2018-01-09 Agco International Gmbh Vehicle ballasting assistance
CN116235708A (en) * 2023-04-25 2023-06-09 佳木斯惠尔橡塑股份有限公司 Threshing device for harvester

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022118393A1 (en) * 2022-07-22 2024-01-25 John Deere GmbH & Co. KG Cleaning assembly for a combine harvester

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE534336C (en) * 1929-03-22 1931-10-02 Heinrich Lanz Akt Ges Sieve for separating the chaff from the short straw in threshing machines
US2314901A (en) * 1939-04-06 1943-03-30 Allis Chalmers Mfg Co Harvester-thresher
FR1227210A (en) * 1957-06-21 1960-08-19 Advanced combine harvester
US3602230A (en) * 1969-01-10 1971-08-31 Int Harvester Co Dust-settling device
DE2015584C3 (en) * 1970-04-01 1975-02-06 Fritz Dipl.-Ing. 8000 Muenchen Glaser Vibrating tine belt shaker for separating grains from stalk and leaf-shaped material in the combine harvester
US3669121A (en) * 1970-06-30 1972-06-13 Sperry Rand Corp Axial flow threshing and separating means with a load distributing threshing rotor
CA948950A (en) * 1971-11-22 1974-06-11 William B. Reed Pneumatic rotary classifier
US3982549A (en) * 1975-08-28 1976-09-28 International Harvester Company Helical element rotor-axial flow combine

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2651088A1 (en) * 1989-08-30 1991-03-01 Proizv Ob Tag Thresher particularly for combine harvesters
EP1495668A3 (en) * 2003-07-05 2005-04-20 Deere & Company Axial flow separator device
WO2015062965A1 (en) * 2013-10-31 2015-05-07 Agco A/S Grain separating apparatus in a combine harvester
US9629310B2 (en) 2013-10-31 2017-04-25 Agco A/S Grain separating apparatus in a combine harvester
US9864497B2 (en) 2014-09-26 2018-01-09 Agco International Gmbh Vehicle ballasting assistance
CN116235708A (en) * 2023-04-25 2023-06-09 佳木斯惠尔橡塑股份有限公司 Threshing device for harvester

Also Published As

Publication number Publication date
DE2830103C2 (en) 1982-09-23
FR2430186A1 (en) 1980-02-01
FR2430186B1 (en) 1984-03-09
GB2024594B (en) 1982-08-18
DE2830103A1 (en) 1980-01-17

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PCNP Patent ceased through non-payment of renewal fee