CN215345979U

CN215345979U - Rotary straw cutting and returning machine

Info

Publication number: CN215345979U
Application number: CN202120816410.9U
Authority: CN
Inventors: 王立军; 王后升; 李懿航; 王英帅; 于锟蒙
Original assignee: Northeast Agricultural University
Current assignee: Northeast Agricultural University
Priority date: 2021-04-21
Filing date: 2021-04-21
Publication date: 2021-12-31
Anticipated expiration: 2031-04-21

Abstract

A rotary straw cutting and returning machine belongs to agricultural machinery; this field returning machine passes through gearbox and many drive belts and transmits power for pickup attachment and cutting device, cutting device adopts rotation chain drive cutting, be equipped with sprocket and belt on the drive shaft, sprocket and chain intermeshing drive the sword that moves on the chain curb plate and carry out rotary motion, drive shaft side band pulley diameter is inconsistent, realize the differential gyration, and lower drive shaft is longer than last drive shaft, rear housing upper and lower portion all has the stationary knife, with move the sword staggered arrangement, and rear housing lower part has the sieve mesh, rear housing front portion is convex screen cloth structure, the rear portion links to each other with the bolt for the rear screen cloth, this field returning machine has both improved the kibbling ability of straw cutting, length and broken degree when having ensured the straw discharge machine again, have structural design novel, rationally, characteristics such as straw cutting crushing ability is strong.

Description

Rotary straw cutting and returning machine

Technical Field

The invention belongs to agricultural machinery, and mainly relates to a rotary straw cutting and returning machine.

Background

The existing straw returning machine adopts a single-shaft flail knife type cutting mode, the working principle of the existing straw returning machine is that a movable knife and a fixed knife are matched to cut straws, the mode is simple and easy to implement, but the straw crushing effect is poor, the fine crushing degree is low, the grass winding phenomenon is easy to occur, and particularly when the moisture content of the straws is high, the phenomenon of missed cutting or incomplete crushing can occur when the traditional straw returning machine works.

Disclosure of Invention

The invention aims to solve the technical problems, and develops a rotary straw cutting and returning machine, which realizes that longer straws are repeatedly cut until the length of the straws reaches the length allowed by screens at the bottom and the rear part of the returning machine and then are discharged out of the machine, thereby achieving the purpose of thoroughly crushing the straws.

The invention aims to realize that the rotary type straw cutting and returning machine mainly comprises three-point suspension 1, a front cover shell 2, a gearbox 3, a driving shaft 6, a driving belt A7, a driving shaft A8, a driving belt B9, a driving shaft B10, a driving belt C11, a driving shaft C12, a driving belt D13, a driving belt E14, a rear screen 16, a movable knife 17, a chain 18, a chain wheel 19, a belt 20, a fixed knife 21 and other parts. The method is characterized in that: the power is transmitted to the pickup device 4 through the driving shaft 6 and the driving belt A7, the pickup device 4 can pick up and throw the straws to the straw smashing device at the rear part, the power is transmitted to the driving shaft B10 and the driving shaft C12 of the straw smashing device through the driving belt B9 and the driving belt C11, the diameters of belt wheels at the side parts of the two driving shafts are different, so that differential motion of the two shafts is realized, a plurality of chain wheels 19 and belts 20 are arranged on the two shafts of the upper driving shaft and the lower driving shaft, the chain wheels 19 drive a chain 18, moving blades 17 are arranged on side plates 23 of the chain, fixed blades 21 are arranged on the upper part and the lower part of the housing 22, the moving blades 17 and the fixed blades 21 are arranged in a staggered mode, sieve holes are arranged at the lower part of the housing, the front part of the housing is of an arc-shaped structure, and the rear part of the housing is connected with the rear screen 16 through bolts 15.

According to the rotary type straw cutting and returning machine, differential rotation can be realized due to the fact that the side belt wheels are different in size, the lower shaft is high in rotation speed, the upper shaft is low in rotation speed, materials can be conveyed backwards quickly, materials in the front can be prevented from being accumulated, straws can be fed into the cutting device better due to the fact that the lower shaft is long, moving knives on the chain are matched with fixed knives on the housing during operation, supporting cutting is realized, the chain wheel drives the chain to enable the moving knives to rotate back and forth, the rear screen is arc-shaped, straws meeting the length requirement can be discharged out of the machine smoothly, unsatisfied straws can be brought back by the moving knives to be matched with the fixed knives below the housing to be cut, repeated cutting of the straws is realized, corn straws can be sufficiently crushed and cut, the length of the straws meets certain requirement, and the straw length qualification rate and the crushing degree of the straw returning are improved.

Drawings

FIG. 1 is a schematic view of the general structure of a rotary type machine for repeatedly cutting stalks and returning them to fields

FIG. 2 is a schematic view of the overall structure of the straw cutting device

FIG. 3 is a side view of FIG. 2

FIG. 4 is a front view of FIG. 2

FIG. 5 is a schematic view of an outer housing and stationary knife of the shredding device

FIG. 6 is a schematic view of the chain and moving blade

Description of part numbers in the figures:

1. three-point suspension, 2, a front cover shell, 3, a gearbox, 4, a pickup device, 5, a support, 6, a driving shaft, 7, a transmission belt A, 8, a driving shaft A, 9, a transmission belt B, 10, a driving shaft B, 11, a transmission belt C, 12, a driving shaft C, 13, a transmission belt D, 14, a transmission belt E, 15, a bolt, 16, a rear screen, 17, a movable knife, 18, a chain, 19, a chain wheel, 20, a belt, 21, a fixed knife, 22, a rear cover shell, 23, a side plate, 24, a bolt and a 25 chain.

Detailed Description

The embodiment of the invention is described in detail below with reference to the accompanying drawings, a rotary type repeatedly cutting straw returning machine is provided, a three-point suspension 1 is hung behind a tractor, a gearbox 3 transmits power to a driving shaft A8 of a pickup device through a driving shaft 6 and a transmission belt A7, the pickup device picks up straws in a rear straw cutting device, the power is transmitted to a driving shaft B10 and a driving shaft C12 through a transmission belt B9 and a transmission belt C11, the diameter of a belt wheel at the side of the driving shaft B10 is smaller than that of the driving shaft C12, therefore, the driving shaft B10 has high rotation speed, materials can be quickly transported backwards, the materials are prevented from being accumulated, a plurality of chain wheels 19 and a belt 20 are arranged on two shafts, the belt 20 is arranged to prevent the phenomenon of missed cutting caused by directly dropping the straws, the chain wheels 19 are meshed with a chain 18 for transmission, a side plate 23 and a movable knife 17 are fixed by bolts 24, therefore, the movable knife 17 can carry out reciprocating rotation motion along with the meshing transmission of the chain wheels 19 and the chain 18, the movable knives 17 between the two shafts are staggered and reversely rotate, so that supporting cutting can be realized, when the straws are cut up, the straws are conveyed to the rear by the belt 20, the straws with high fineness are discharged out of the machine through the rear screen 16, longer straws cannot be discharged out of the machine and can be brought back by the rotating movable knives 17 and are matched with the fixed knives 21 on the rear housing 22 to carry out secondary cutting on the straws, the straws meeting the fineness requirement can be directly discharged out of the machine through screen holes at the bottom of the rear housing, and the straws which are not discharged out of the machine can be thrown back along with the matching of the movable knives 17 and the arc-shaped structure at the front part of the rear housing 22 and enter the cutting device again, so that the straws can be repeatedly cut back.

Claims

1. The utility model provides a rotation cutting straw returning machine which characterized in that: the power is transmitted to the pickup device (4) through the driving shaft (6), the driving belt A (7) and the driving shaft A (8), the pickup device (4) can pick up straws to the straw smashing device at the rear part, the power is transmitted to the driving shaft B (10) and the driving shaft C (12) of the straw smashing device through the driving belt B (9) and the driving belt C (11), the diameters of belt wheels at the side parts of the two driving shafts are different, so that the differential motion of two shafts is realized, the driving shaft B (10) is longer than the driving shaft C (12), a plurality of chain wheels (19) and belts (20) are arranged on the two driving shafts, the chain wheels (19) drive a chain (18), a movable knife (17) is arranged on a side plate (23) of the chain, the movable knife (17) can perform rotary motion along with the chain transmission, fixed knives (21) are arranged at the upper part and the lower part of the rear housing (22), and the movable knives (17) and the fixed knives (21) are arranged in a staggered mode, and the lower part of the rear cover shell (22) is provided with a sieve hole, the front part of the cover shell is of an arc structure, and the rear part of the cover shell is connected with the rear screen (16) by a bolt (15).