CN108246594B

CN108246594B - Fixed sieve and moving rake teeth combined grain cleaning mechanism

Info

Publication number: CN108246594B
Application number: CN201810025726.9A
Authority: CN
Inventors: 王立军; 崔友强; 李义博; 郑招辉; 冯鑫; 段良坤
Original assignee: Northeast Agricultural University
Current assignee: Northeast Agricultural University
Priority date: 2018-01-11
Filing date: 2018-01-11
Publication date: 2020-04-24
Anticipated expiration: 2038-01-11
Also published as: CN108246594A

Abstract

A fixed sieve and moving rake teeth combined grain cleaning mechanism, belonging to agricultural machinery; a rack assembly, a cleaning sieve, a driving shaft and a sliding block are respectively assembled on the rack assembly, rake teeth are assembled on the rake rack through a tooth holder, n-shaped tooth claws are installed on the rake teeth, strip-shaped bosses are arranged on the cleaning sieve, the n-shaped tooth claws are positioned in grooves between adjacent strip-shaped bosses, an eccentric wheel A and an eccentric wheel B are fixedly installed on the driving shaft, the eccentric wheel B is connected with the rake rack through a rake rack driving rod, the eccentric wheel A is connected with the sliding block through a rake tooth driving rod, two ends of a pull wire are respectively connected to the sliding block and the rake teeth, and two ends of a flexible tension spring are respectively connected to the tooth holder and the rake teeth; the mechanism adopts a combined structure of the fixed screen body and the moving rake teeth to complete the grain cleaning operation, breaks through the traditional structure of the vibrating screen body, and has the characteristics of unique, novel, reasonable and simple structure, difficult blockage of screen holes, few use faults, high operation efficiency, good cleaning quality, small vibration and low noise.

Description

Fixed sieve and moving rake teeth combined grain cleaning mechanism

Technical Field

The invention belongs to agricultural machinery, and mainly relates to a grain cleaning operation mechanism.

Background

The straight reciprocating vibrating grain sorting sieve is a traditional grain sorting mechanism which is most commonly used at present, and due to the defects of structural design, the grain sorting mechanism with the structure is easy to cause the phenomenon of sieve pore blockage in the grain sorting operation process, causes the technical problems of low grain sorting operation efficiency, poor sorting quality, multiple faults and the like, and simultaneously has the defects of large operation vibration, high noise and short service life of machines and tools. In order to solve the problems, in recent years, various grain cleaning mechanisms with different structures, such as a vertical vibration and horizontal rotation combined grain cleaning machine, a wave sieve type grain cleaning mechanism, a double-layer sieve longitudinal horizontal inclination servo-regulation grain cleaning mechanism, a rotary shaking type grain cleaning device and the like are in the research process, and various ideas and ways for solving the problems are provided for the grain cleaning mechanism. However, the above-mentioned various technical solutions still have the problem of complicated structure to be solved.

Disclosure of Invention

The invention aims to solve the problems in the prior art, and researches and designs a fixed sieve and movable rake tooth combined grain cleaning mechanism, so that the purposes of simple structure, difficult blockage of sieve pores, high cleaning operation efficiency, good cleaning quality, low operation noise and few use faults are achieved.

The invention aims to realize the purposes that a cleaning sieve is fixedly arranged on the middle part of a frame assembly in a longitudinal inclined configuration, and a plurality of strip-shaped bosses are sequentially arranged on the upper end surface of the cleaning sieve in a longitudinal parallel manner; the scraper rack is arranged on the upper side part of the rack assembly and positioned above the sorting screen and can longitudinally reciprocate, a plurality of tooth holders are sequentially arranged on the lower side part of the scraper rack along the transverse direction, the scraper teeth can be hinged and arranged on the lower side part of the tooth holders in a longitudinal swinging manner, a scraper tooth connecting rod is sequentially inserted and fixedly arranged on the scraper teeth to fixedly connect the plurality of scraper teeth into a whole, n-shaped tooth claws are arranged on the bottom end parts of the scraper teeth, and the n-shaped tooth claws are positioned in grooves between adjacent strip-shaped bosses; a driving shaft is rotatably assembled on the rear side part of the rack assembly, an eccentric wheel A and an eccentric wheel B are sequentially and fixedly arranged on the driving shaft, the rear end part of a rake rack driving rod is rotatably sleeved on the eccentric wheel B, the front end part of the rake rack driving rod is hinged with a rake rack, the rear end part of a rake tooth driving rod is rotatably sleeved on the eccentric wheel A, a sliding block is longitudinally and reciprocally movably arranged on the upper part of the rear side of the rack assembly, the front end part of the rake tooth driving rod is hinged with the sliding block, and the front end and the rear end of a pull wire are respectively connected with the rake tooth and the sliding; the upper and lower ends of the flexible tension spring are respectively connected with the tooth holder and the rake teeth, so that the fixed sieve and the movable rake teeth combined grain cleaning mechanism is formed.

The invention breaks through the traditional vibrating screen body structure, adopts a combined structure of the fixed screen body and the moving rake teeth matched with the fixed screen body, cleans and separates the grains, the straws and the sundries from the screen body by utilizing the mode of uniformly raking and distributing the moving rake teeth on the fixed screen surface, finishes the operation, and has the characteristics of unique, novel, reasonable and simple structure, difficult blockage of screen holes, less faults, high cleaning efficiency, good cleaning quality, stable mechanism operation, low noise, small vibration and long service life.

Drawings

FIG. 1 is a schematic view of the general structure of a fixed sieve and moving rake teeth combined grain cleaning mechanism;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is an enlarged view of portion A of FIG. 2;

FIG. 4 is an enlarged sectional view of the portion B of FIG. 1;

fig. 5 is a three-dimensional schematic diagram of the overall structure of the fixed sieve and moving rake teeth combined grain cleaning mechanism.

Description of part numbers in the figures:

1. the device comprises a frame assembly, 2, a feeding sliding plate, 3, rake teeth, 4, a tooth holder, 5, a sorting screen, 6, a rake frame, 7, a rake frame driving rod, 8, a sliding block, 9, a rake tooth driving rod, 10, eccentric wheels A and 11, a driving shaft, 12, a impurity removing sliding plate, 13, a rake tooth connecting rod, 14, a pull wire, 15, eccentric wheels B and 16, a strip-shaped boss, 17, n-shaped tooth claws, 18 and a flexible tension spring.

Detailed Description

The following detailed description of the inventive embodiments is provided in connection with the accompanying drawings. A fixed sieve and movement rake teeth combined grain cleaning mechanism, the fixed installation cleaning sieve 5 disposed along the longitudinal direction in the form of slope on the middle part of the frame assembly 1, install multiple bar-shaped bosses 16 sequentially along the longitudinal direction parallel to each other on the upper end surface of the said cleaning sieve 5; a rake rack 6 which is arranged on the upper side part of the frame assembly 1 and can longitudinally reciprocate at the position above the sorting screen 5, a plurality of tooth holders 4 are sequentially arranged on the lower side part of the rake rack 6 along the transverse direction, rake teeth 3 are hinged and arranged on the lower side parts of the tooth holders 4 in a longitudinal swinging manner, rake tooth connecting rods 13 are sequentially inserted and fixedly arranged on the rake teeth 3 to fixedly connect a plurality of rake teeth 3 into a whole, n-shaped tooth claws 17 are arranged on the bottom end parts of the rake teeth 3, and the n-shaped tooth claws 17 are positioned in grooves between adjacent strip-shaped bosses 16; the rear side part of the rack assembly 1 is rotatably provided with a driving shaft 11, an eccentric wheel A10 and an eccentric wheel B15 are sequentially and fixedly arranged on the driving shaft 11, the rear end part of a rake frame driving rod 7 is rotatably sleeved on the eccentric wheel B15, the front end part of the rake frame driving rod 7 is hinged with a rake frame 6, the rear end part of a rake tooth driving rod 9 is rotatably sleeved on the eccentric wheel A10, a sliding block 8 is longitudinally and reciprocally arranged on the upper part of the rear side of the rack assembly 1, the front end part of the rake tooth driving rod 9 is hinged with the sliding block 8, and the front end and the rear end of a stay wire 14 are respectively connected with a rake tooth 3 and the sliding block 8; the upper and lower ends of the flexible tension spring 18 are respectively connected with the tooth holder 4 and the rake teeth 3. A material feeding sliding plate 2 is arranged on the upper part of the front end of the frame assembly 1 and above the sorting screen 5, and a trash discharging sliding plate 12 is arranged on the lower part of the rear end of the frame assembly 1 and below the sorting screen 5.

During operation, grains fall from the feeding sliding plate 2 to the upper part of the front side of the fixed cleaning sieve 5, the external power is used for driving the eccentric wheel A10 and the eccentric wheel B15 to rotate through the driving shaft 11, wherein the rotating motion of the eccentric wheel B15 integrally drives the rake teeth 3 to do linear reciprocating motion relative to the cleaning sieve 5 along the longitudinal direction through the rake rack driving rod 7, the rake rack 6 and the tooth holder 4 in sequence, the rake teeth 3 discharge the overhead impurities supported on the strip-shaped bosses 16 from front to back through the impurity discharging sliding plate 12, the n-shaped claw 17 in the groove between the adjacent strip-shaped bosses 16 rake teeth the grains and the small impurities move from the front side of the cleaning sieve 5 to the rear side in sequence, so that the grains fall from the sieve holes of the cleaning sieve 5 in sequence to complete separation, and the small impurities are discharged from the impurity discharging sliding plate 12. In the operation process, when the rake frame 6 moves back from the rear side to the front side of the sorting screen 5, the rotation motion of the eccentric wheel A10 drives the rake teeth 3 to rotate towards the rear side around the hinged point with the tooth base 4 through the rake teeth driving rod 9 and the pull wire 14 to drive the n-shaped tooth claws 17 to be separated from the matching with the sorting screen 5, at the moment, the flexible tension spring 18 is stressed to stretch and extend, when the rake frame 6 returns to the front side part of the sorting screen 5, the slide block 8 moves forwards and releases the pull wire 14, under the action of the return tension of the flexible tension spring 18, the rake teeth 3 drive the n-shaped tooth claws 17 to return to the operation position matched with the sorting screen 5, and rake raking movement operation is carried out on grains again and circulation is carried out sequentially.

Claims

1. The utility model provides a mechanism is cleaned with combination formula cereal of motion rake teeth to fixed sieve which characterized in that: a cleaning screen (5) is fixedly arranged on the middle part of the frame assembly (1) in a longitudinal inclined configuration, and a plurality of strip-shaped bosses (16) are sequentially arranged on the upper end surface of the cleaning screen (5) in a longitudinal parallel manner; a rake rack (6) which is arranged on the upper side part of the frame assembly (1) and can longitudinally reciprocate at the position above the sorting screen (5), a plurality of tooth holders (4) are transversely and sequentially arranged on the lower side part of the rake rack (6), rake teeth (3) are longitudinally and swingably hinged and arranged on the lower side part of the tooth holders (4), rake tooth connecting rods (13) are sequentially inserted and fixedly arranged on the rake teeth (3) to fixedly connect the rake teeth (3) into a whole, n-shaped tooth claws (17) are arranged on the bottom end parts of the rake teeth (3), and the n-shaped tooth claws (17) are positioned in grooves between adjacent strip-shaped bosses (16); a driving shaft (11) is rotatably assembled on the rear side part of the rack assembly (1), an eccentric wheel A (10) and an eccentric wheel B (15) are fixedly installed on the driving shaft (11) in sequence, the rear end part of a rake rack driving rod (7) is rotatably sleeved on the eccentric wheel B (15), the front end part of the rake rack driving rod (7) is hinged with a rake rack (6), the rear end part of a rake tooth driving rod (9) is rotatably sleeved on the eccentric wheel A (10), a sliding block (8) can be longitudinally and reciprocally installed on the upper part of the rear side of the rack assembly (1), the front end part of the rake tooth driving rod (9) is hinged with the sliding block (8), and the front end and the rear end of a stay wire (14) are respectively connected with the rake teeth (3) and the sliding block (8); the upper end and the lower end of the flexible tension spring (18) are respectively connected to the tooth holder (4) and the rake teeth (3).

2. The fixed screen and moving rake teeth combined grain cleaning mechanism as set forth in claim 1, wherein: a feeding sliding plate (2) is arranged at the upper part of the front end of the frame assembly (1) and above the sorting screen (5), and a trash discharging sliding plate (12) is arranged at the lower part of the rear end of the frame assembly (1) and below the sorting screen (5).