CN201349423Y

CN201349423Y - Downdraught three-section screen cleaning mechanism of combined harvester

Info

Publication number: CN201349423Y
Application number: CNU2008202110222U
Authority: CN
Inventors: 李源湘; 胡华峰
Original assignee: SHUANGFENG XIANGYUAN JINSUI HARVESTER MANUFACTURING Co Ltd
Current assignee: SHUANGFENG XIANGYUAN JINSUI HARVESTER MANUFACTURING Co Ltd
Priority date: 2008-12-19
Filing date: 2008-12-19
Publication date: 2009-11-25
Anticipated expiration: 2018-12-19

Abstract

The utility model relates to a downdraught three-section screen cleaning mechanism of a combined harvester, which comprises a mesh screen which is installed on a stander and can be driven by a driving mechanism to make reciprocating swing, and is characterized in that the mesh screen is integrally formed by a front section screen body, a middle section screen body and a rear section screen body, wherein the bottom of the front section screen body is higher than that of the rear section screen body, and the middle section screen body is of an inclined section with two ends being respectively connected with the front and the rear section screen bodies; the bottom of the rear section screen body is provided with meshes or discharging holes; an exhaust fan is arranged above the middle section screen body. The downdraught three-section screen cleaning mechanism has the advantages of good cleaning effect on separating grains and grass, simple structure, small size, less power consumption, small vibration amplitude and the like.

Description

Three sections sieve cleaning mechanisms of a kind of exhausting formula of combine

Technical field

The utility model relates to agricultural machinery, further is 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, its fan has centrifugal or type such as axial-flow type, the air-flow that produces flows through whole compass screen surface from the inside to surface, and 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, 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.

The utility model content

The technical problems to be solved in the utility model is, at the defective that present technology exists, designs three sections sieve cleaning mechanisms of exhausting formula of a kind of combine, has advantages such as grain is effective and simple in structure clearly, volume is little, power consumption is little, amplitude is little.

The technical solution of the utility model is, three sections sieve cleaning mechanisms of the exhausting formula of described combine comprise 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 position is higher than at the bottom of the sieve of described back segment sieve nest at the bottom of the sieve of described leading portion sieve nest, and the stage casing sieve nest is the tilting section that two ends connect leading portion sieve nest and back segment sieve nest respectively; 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 utility model made further specify.

Referring to Fig. 1 to Fig. 3, three sections sieve cleaning mechanisms of the exhausting formula of combine described in the utility model comprise the sieve 1 that is installed on the frame and can be made reciprocally swinging by the driving mechanism drive, its design feature is, 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 position is higher than at the bottom of the sieve of described back segment sieve nest 4 at the bottom of the sieve of described leading portion sieve nest 2, and stage casing sieve nest 3 connects the tilting section of leading portion sieve nest 2 and back segment sieve nest 4 respectively for two ends; Be provided with sieve aperture 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.Described sieve aperture is for falling the sieve screen apertures of grain.

Also can stalk chute 7 be set, in order to discharge 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 utility model is, 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, because leading portion sieve 2 has gradient, 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, scurry to roll when grain and fall into sieve aperture (when this section sieve nest is provided with sieve aperture), be rolled on the back segment sieve nest 4 and before the grain that has not fallen continues and drop into the grain pocket from its sieve aperture or discharging opening to stage casing sieve nest 3 places; 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 utility model 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 a kind of embodiment of the utility model;

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 the utility model device 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, three sections sieve cleaning mechanisms of the exhausting formula of described combine comprise 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 position is higher than at the bottom of the sieve of described back segment sieve nest 4 at the bottom of the sieve of described leading portion sieve nest 2, and stage casing sieve nest 3 connects the tilting section of leading portion sieve nest 2 and back segment sieve nest 4 respectively for two ends; Be provided with sieve aperture 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.

0 ° of-10 ° of angle can be become at the bottom of the sieve of described leading portion sieve nest 2 with horizontal plane, 3 ° of-30 ° of angles can be become at the bottom of the sieve of stage casing sieve nest 3 with horizontal plane.

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, three sections sieve cleaning mechanisms of a kind of exhausting formula of 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 position is higher than at the bottom of the sieve of described back segment sieve nest (4) at the bottom of the sieve of described leading portion sieve nest (2), and stage casing sieve nest (3) connects the tilting section of leading portion sieve nest (2) and back segment sieve nest (4) respectively for two ends; Be provided with sieve aperture or discharging opening at the bottom of the sieve of described back segment sieve nest (4); Air exhauster (5) is equipped with in described stage casing sieve nest (3) top.

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).