CN101743813A

CN101743813A - Grain cleaning device with three-section flat-bottom sieves for reverse separation on combine harvester

Info

Publication number: CN101743813A
Application number: CN200810107548A
Authority: CN
Inventors: 李源湘; 胡华锋
Original assignee: SHUANGFENG XIANGYUAN JINSUI HARVESTER MANUFACTURING Co Ltd
Current assignee: SHUANGFENG XIANGYUAN JINSUI HARVESTER MANUFACTURING Co Ltd
Priority date: 2008-12-22
Filing date: 2008-12-22
Publication date: 2010-06-23

Abstract

A grain cleaning device with three-section flat-bottom sieves for reverse separation on a combine harvester comprises a sieve which is mounted on a rack and can be driven to swing back and forth by a driving mechanism. The sieve is formed by a front-section sieve body, a middle-section sieve body and a back-section sieve body in sequence. The length direction and the horizontal plane of the sieve 1 form an included angle alpha of 3-30 degrees. The bottom of the back-section sieve body 4 is provided with sieve pores 9 or discharge outlets. An exhaust fan 5 is mounted above the middle-section sieve body 3. The grain cleaning device has the characteristics of good grain cleaning effect, namely separation of grains from weeds, small volume, less power consumption, small amplitude and the like.

Description

A kind of grain cleaning device with three-section flat-bottom sieves for reverse separation of combine

Technical field

The present invention relates to agricultural machinery, further be meant the separation grain that is contained on the rice/wheat combine, the cleaning mechanism of grass.

Background technology

The cleaning mechanism that on the combine weeds and grain is separated all sieves the formula cleaning mechanism for the air-flow of being made up of multi-deck screen and fan at present, used sieve has wire gauze sieve or flake sieve, stamped sieve, lip(ped) sieve, and these sieves sieve ends are smooth and evenly be densely covered with the sieve aperture that allows grain pass through; One end of sieve is furnished with fan, and its fan has centrifugal or type such as axial-flow type, and the air-flow of generation flows through whole compass screen surface from the inside to surface, weeds thing and grain outwards move, in order thoroughly to separate grain and careless assorted, general cleaning mechanism all has the two layer screen of different sieve aperture forms, and second lift mechanism is arranged, clean for twice, its mechanism's complexity, power consumption is big, and is bulky, 1/3 of the complete machine that accounts for haves much room for improvement.

Summary of the invention

The technical problem to be solved in the present invention is, at the defective that present technology exists, designs a kind of grain cleaning device with three-section flat-bottom sieves for reverse separation of combine, has advantages such as grain is effective and simple in structure clearly, volume is little, power consumption is little, amplitude is little.

Technical scheme of the present invention is, the grain cleaning device with three-section flat-bottom sieves for reverse separation of described combine comprises the sieve that is installed on the frame and can be made reciprocally swinging by the driving mechanism drive, its design feature is, described sieve is made of whole successively leading portion sieve nest and stage casing sieve nest, back segment sieve nest, the length direction of described sieve becomes 3 ° of-30 ° of angles with horizontal plane; Be provided with sieve aperture or discharging opening at the bottom of the sieve of described back segment sieve nest 4; Air exhauster is equipped with in sieve nest top, described stage casing.

Below the present invention made further specify.

Referring to Fig. 1 to Fig. 3, the grain cleaning device with three-section flat-bottom sieves for reverse separation of combine of the present invention comprises the sieve 1 that is installed on the frame and can be made reciprocally swinging by the driving mechanism drive, its design feature is that described sieve 1 is made of whole successively leading portion sieve nest 2 and stage casing sieve nest 3, back segment sieve nest 4; Referring to Fig. 2, the length direction of described sieve 1 and horizontal plane angle α are 3 °-30 °; Be provided with sieve aperture 9 or discharging opening at the bottom of the sieve of described back segment sieve nest 4; Air exhauster 5 is equipped with in sieve nest 3 tops, described stage casing.

Described each sieve nest can be made up of the rib 6 of the sieve end and corresponding both sides.

For dull and stereotyped (being the solid plate of atresia), also can have the slotted eye 8 that grains such as grain or wheat can not leak down at the bottom of the sieve of described leading portion sieve nest 2;

For dull and stereotyped (being the solid plate of atresia), also can have the slotted eye 8 that grains such as grain or wheat can not leak down at the bottom of the sieve of described stage casing sieve nest 3; It can also be the structure that has sieve aperture 9.The sieve screen apertures of described sieve aperture for can just sieving down grain.

Also can stalk chute 7 be set, with discharging stalk in the rear end of described back segment sieve nest 4 (being the right-hand member among Fig. 1 to Fig. 3).

Design principle of the present invention is, because sieve is suitable tilting installation, the cereal in the threshing bin at first drops on the leading portion sieve nest 2 of sieve 1 through going out the mouth of a valley, and along with the reciprocal shake of sieve 1, grain (as cereal) particle is to stage casing sieve nest 3 direction plaies; In the play process because of the grain quality greater than weeds, grain (as grain) can sink to the sieve bottom surface; Grain is scurried to stage casing sieve nest 3 places and is fallen into sieve aperture, and do not fallen continue to be rolled on the back segment sieve nest 4 and from its sieve aperture or discharging opening dropped into the grain pocket; Grass is mixed and will be floated over above the grain layer in described play process, when grass is assorted when scurrying to stage casing sieve nest 3 (the suction opeing position of blower fan), is upwards taken away by air exhauster, separates with grain is reverse; Grain then is sent to back segment sieve nest 4, falls from sieve aperture or discharging opening.

As known from the above, the present invention is three sections sieve cleaning mechanisms of exhausting formula of a kind of combine, has advantages such as the clear grain that army provisions separate is effective and simple in structure, volume is little, power consumption is few, amplitude is little.

Description of drawings

Fig. 1 is the plan structure schematic diagram of an embodiment of the present invention;

Fig. 2 be in the device shown in Figure 1 A-A to the plan structure schematic diagram;

Fig. 3 is the plan structure schematic diagram after another embodiment removes air exhauster;

Fig. 4 is that device shown in Figure 1 is installed in the structure on a kind of baby combine frame;

Fig. 5 is the structural representation that the baby combine of apparatus of the present invention has been installed.

In the drawings:

The 1-sieve, 2-leading portion sieve nest, 3-stage casing sieve nest,

4-back segment sieve nest, the 5-air exhauster, the 6-rib,

7-stalk chute, the 8-slotted eye, the 9-sieve aperture,

The 10-connecting rod, 11-sprocket wheel, 12-frame.

Embodiment

Referring to Fig. 1 to Fig. 3, the grain cleaning device with three-section flat-bottom sieves for reverse separation of described combine comprises the sieve 1 that is installed on the frame and can be made reciprocally swinging by the driving mechanism drive, described sieve 1 is made of whole successively leading portion sieve nest 2 and stage casing sieve nest 3, back segment sieve nest 4, the length direction of described sieve 1 and horizontal plane angle α are 5 °; Be provided with sieve aperture 9 or discharging opening at the bottom of the sieve of described back segment sieve nest 4; Air exhauster 5 is equipped with in sieve nest 3 tops, described stage casing.

Described each sieve nest is made up of the rib 6 of the sieve end and corresponding both sides.

Offer some slotted eyes 8 at the bottom of the sieve of described leading portion sieve nest 2 and at the bottom of the sieve of stage casing sieve nest 3, and the width of each slotted eye can not to leak down with grains such as grain or wheats be yardstick; Have Fig. 1 or sieve aperture 9 shown in Figure 2 at the bottom of the sieve of described back segment sieve nest 4; The rear end of described back segment sieve nest 4 is provided with stalk chute 7.

During actual installation, as shown in Figure 4, sieve 1 is suspended on the frame 12, and an end of connecting rod 10 is hinged on the eccentric shaft of sprocket wheel 11, and the other end is hinged with sieve 1 one sides, has just constituted the driving mechanism of sieve 1; When sprocket wheel 11 rotates, just drive sieve 1 and make corresponding reciprocally swinging (shake).

Claims

1. the grain cleaning device with three-section flat-bottom sieves for reverse separation of a combine, comprise the sieve 1 that is installed on the frame and can makes reciprocally swinging by the driving mechanism drive, it is characterized in that, described sieve 1 is made of whole successively leading portion sieve nest 2 and stage casing sieve nest 3, back segment sieve nest 4, the length direction of described sieve 1 and horizontal plane angle α are 3 °-30 °; Be provided with sieve aperture 9 or discharging opening at the bottom of the sieve of described back segment sieve nest 4; Air exhauster 5 is equipped with in sieve nest 3 tops, described stage casing.

2. according to three sections sieve cleaning mechanisms of exhausting formula of the described combine of claim 1, it is characterized in that, at the bottom of the sieve of described leading portion sieve nest 2 for dull and stereotyped or have a slotted eye 8 that grains such as grain or wheat can not leak down.

3. according to three sections sieve cleaning mechanisms of exhausting formula of the described combine of claim 1, it is characterized in that, at the bottom of the sieve of described stage casing sieve nest 3 for dull and stereotyped or have a slotted eye 8 that grain can not leak down; Or have a sieve aperture 9.

4. according to three sections sieve cleaning mechanisms of exhausting formula of the described combine of claim 1, it is characterized in that the rear end of described back segment sieve nest (4) is provided with stalk chute (7).