CN104025814A

CN104025814A - Inverted toothed sieve

Info

Publication number: CN104025814A
Application number: CN201410236639.XA
Authority: CN
Inventors: 刘大明; 胡兴龙
Original assignee: Chongqing Hwasdan Machinery Manufacturing Co Ltd
Current assignee: Chongqing Hwasdan Machinery Manufacturing Co Ltd
Priority date: 2014-05-30
Filing date: 2014-05-30
Publication date: 2014-09-10

Abstract

The invention discloses an inverted toothed sieve. The inverted toothed sieve solves the problem that part of grains cannot pass through a screen to be thrown out in the fast sieving process. The inverted toothed sieve comprises a sieve board and is characterized in that a pushing part capable of generating lateral thrust on materials on the sieve surface is arranged on the sieve board in an erected mode, the sieve board is provided with sieve meshes, and part of the sieve meshes are located in the pushing part. According to the scheme, the inverted toothed sieve has the following advantages that part of the sieve meshes are located in the pushing part, the other part of the sieve meshes are located in the non-pushing part, the pushing part is aslant arranged on the plane of the sieve board, the non-pushing part is roughly parallel with the plane of the sieve board, and an included angle is formed between the pushing part and the non-pushing part. Compared with sieve meshes in a slab, the sieve meshes in the two sides of the included angle can obtain a larger superficial area.

Description

Pawl sieve

Technical field

The present invention relates to the screen cloth on a kind of threshing apparatus.

Background technology

Grain combine is called for short combine, gathers in exactly the combination machine machinery of crops, is harvesting, threshing, the separated cane that can once complete cereal, removes the operations such as assorted excess, directly obtains the harvest machinery of grain from field.

In the prior art, known technology is with screen cloth, to carry out the disengaging of grain and weeds, in order to reach better separating effect, screen cloth on a grain header is conventionally in succession superposeed and forms by a plurality of sieve plates with sieve tooth, during work, screen cloth moves back and forth, grain is fallen into pen by the sieve aperture on screen cloth, weeds etc. are because volume is compared with passing through sieve aperture greatly, the sieve tooth of reciprocating action simultaneously gives the thrust of weeds horizontal and vertical direction, in order to weeds are dished out outside machine, typical sieve tooth is unidirectional tooth, for weeds are pushed to a direction.

Broach sieve is the good screening plant of a kind of bulk material, but, because the structure of screen cloth is in succession superposeed and forms by sieve plate, this just causes sieve aperture on sieve plate to become the hole of relative closure, make often to occur the phenomenon of feed blocking between two sieve plates in screening process, this is the existing weak point of prior art.

And, when combine harvesting speed surpasses certain speed per hour, because harvesting speed is fast, the amount of the grain that threshing is got off is just many, now often there is such situation: grain can not be fallen into rapidly pen timely from screen cloth, therefore always have sub-fraction grain cannot pass through smoothly screen cloth through screen cloth upper surface by outside the machine of dishing out, the percent of loss in recovery process improves greatly.

Summary of the invention

The invention is intended to provide a kind of pawl sieve, to reduce the problem that in rapid screening process, part grain cannot be dished out by screen cloth.

Patent scheme: the pawl sieve in this programme, comprise sieve plate, it is characterized in that: on sieve plate, vertical being provided with can produce the push part of lateral thrust to the material on compass screen surface, and sieve plate is provided with the sieve aperture that part is positioned at push part.

Described push part can be the working face being placed in sieve plate plane, conventionally can establish the angle of inclination of certain limit in working face.Push part on sieve plate is generally a plurality of that array arranges, and it is consistent to push direction.The part of joining with push part on screen cloth can be roughly and is parallel to sieve plate plane as far as possible, to avoid interference the propelling movement direction of sieve plate.Sieve aperture is partly positioned at push part and extends other the more flat positions roughly on screen cloth.

This scheme has the following advantages: the part of sieve aperture is positioned at push part and part is positioned at non-push part, and push part is inclined in sieve plate plane and non-push part is roughly parallel to sieve plate plane, between described push part and non-push part, has certain angle.For the sieve aperture on flat board, the sieve aperture that is positioned at angle both sides can obtain larger surface area.

Further, the longitudinal section of sieve plate is stairstepping or unidirectional profile of tooth, stairstepping or unidirectional profile of tooth one side are push part, and oval-shaped sieve aperture is located at the lug boss that stairstepping on sieve plate or unidirectional profile of tooth are, the major diameter direction of oval-shaped sieve aperture and the vertical consistency of sieve plate.

In described longitudinal section is longitudinally the direction of pawl riddler front-rear reciprocation movement while doing.

Anterior step or the pawl structure of adopting of sieve, oval-shaped sieve aperture longitudinal section is V-shaped, can increase screening area.

And sieve tooth of the prior art need process separately, between general ordered series of numbers sieve aperture, just establish row and sieve tooth.And in this programme each sieve aperture a sieve tooth, a large amount of sieve teeth contributes to push, and avoids weeds to pile up, as cleaning parts.The single-deck screen of this programme is equivalent to the two-layer screening effeciency to three layers of common sieve.

Further, the angle of push part and sieve plate plane is 50～80 °.

Accompanying drawing explanation

Fig. 1 is the schematic perspective view of the embodiment of the present invention.

Fig. 2 is the schematic top plan view of the embodiment of the present invention.

Fig. 3 is that the master of the embodiment of the present invention looks schematic diagram.

Embodiment

Below by embodiment, the present invention is further detailed explanation:

Reference numeral in Figure of description comprises: sieve plate 1, sieve aperture 2, push part 3, non-push part 4.

Embodiment is substantially as shown in Figure 1, 2, 3: the longitudinal section of sieve plate is unidirectional profile of tooth, and in each unidirectional tooth dual-side, a shorter side is push part, and oval-shaped sieve aperture is across to another side from the push part of unidirectional tooth one side of projection.Oval-shaped sieve aperture is located at the lug boss that stairstepping on sieve plate or unidirectional profile of tooth are, the major diameter direction of oval-shaped sieve aperture and the vertical consistency of sieve plate, and the Fig. 2 overlooking can significantly see this feature.

During work, pawl sieves under the drive of engine along the flatness and reciprocator horizontal movement of living in of its sieve plate, because the angle of push part and horizontal plane is larger, can produce to the material on it thrust of larger horizontal direction, and the thrust of vertical direction, impelling material is to the right a side shifting at push part place; And in the non-push part adjacent with push part, the angle of itself and horizontal plane is less, can not produce the thrust of larger horizontal direction, is difficult for causing material to be moved to the left.

This pawl sieve can first process the oval sieve aperture of array on the metallic plate of plane, then by the bending process of metallic plate panel beating.

Above-described is only embodiments of the invention, and in scheme, the general knowledge such as known concrete structure and characteristic is not done too much description at this.Should be understood that; for a person skilled in the art, not departing under the prerequisite of structure of the present invention, can also make some distortion and improvement; these also should be considered as protection scope of the present invention, and these can not affect effect of the invention process and practical applicability.The protection domain that the application requires should be as the criterion with the content of its claim, and the embodiment in specification etc. are recorded the content that can require for power of interpretation profit.

Claims

1. pawl sieve, comprises sieve plate, it is characterized in that: on sieve plate, vertical being provided with can produce the push part of lateral thrust to the material on compass screen surface, and sieve plate is provided with the sieve aperture that part is positioned at push part.

2. pawl according to claim 1 sieves, it is characterized in that: the longitudinal section of sieve plate is stairstepping or unidirectional profile of tooth, stairstepping or unidirectional profile of tooth one side are push part, oval-shaped sieve aperture is located at the lug boss that stairstepping on sieve plate or unidirectional profile of tooth are, the major diameter direction of oval-shaped sieve aperture and the vertical consistency of sieve plate.

3. pawl sieve according to claim 1, is characterized in that: the angle of push part and sieve plate plane is 50～80 °.