CN216567183U

CN216567183U - Straw picking, selecting and conveying mechanism

Info

Publication number: CN216567183U
Application number: CN202120885039.1U
Authority: CN
Inventors: 王杰
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-04-27
Filing date: 2021-04-27
Publication date: 2022-05-24
Anticipated expiration: 2031-04-27

Abstract

The utility model relates to a straw picking, selecting and conveying mechanism. Including frame, actuating mechanism, pickup mechanism, conveying mechanism and selection mechanism from the bottom up install in the frame in proper order, actuating mechanism drives pickup mechanism, conveying mechanism and selection mechanism work. This application can be better filter impurity, shake off the impurity in the material of feeding bundling mechanism, reach and improve the material cleanliness, reduce the purpose of soil stone impurity. This application has improved the operating efficiency, has improved the operation environment greatly, provides reliable assurance for the reutilization of follow-up straw bundle. Because of this application can filter the clamp matter snow in the straw, so winter snow ground can the operation, and is efficient, and the working period lengthens, and is profitable.

Description

Straw picking, selecting and conveying mechanism

Technical Field

The utility model relates to the field of agricultural machinery, in particular to a straw picking, selecting and conveying mechanism.

Background

At present, crops such as corn and the like only obtain seeds in autumn, and corn straws and the like are left in soil. The traditional method is that farmers gather and burn straws, but the burning is easy to cause fire and cause environmental pollution, and is forbidden by the nation all the time. The method for treating the residual straws after the crop is harvested at present is roughly divided into two modes, wherein the first mode is to crush and bury the straws in the soil, and the second mode is to pick up the straws and then bundle the straws, so that the straws can be directly fed to livestock, used for biological power generation or processed into biological fertilizer and the like.

The straw bundling machine in the prior art has the following defects: first, bundling machine uses the hammer leaf to pick up on the market, then carries the bundling mechanism with the straw through auger and fan, leads to being mingled with debris such as soil stone in the straw like this, constructs into the damage to bundling machine, still can influence the application in the straw bundle later stage of beating, and then makes bundling machine receive the problem of very big degree restriction when using. Secondly, northeast area because there is snow on the ground in winter, if use the pickup mechanism of present stage, can be carried snow and impurity for bundling the mechanism together, lead to the straw humidity big, the straw bundle that beats can not preserve for a long time, especially can not pass through summer. Therefore, the bundling machine can not work when snow is accumulated on the ground, the working period is short, and the income is low.

Disclosure of Invention

The utility model aims to provide a straw picking, selecting and conveying mechanism which is used for picking, conveying and selecting straws, filtering out impurities such as soil, stones, snow and the like, and realizing snow field operation in winter.

The technical scheme of the utility model is as follows:

the utility model provides a choice conveying mechanism is picked up to straw, includes frame, actuating mechanism, pick up mechanism, conveying mechanism and choice mechanism from the bottom up installs in proper order in the frame, actuating mechanism drives pick up mechanism, conveying mechanism and choice mechanism work.

The utility model has the beneficial effects that:

1. this application is through pickup mechanism, conveying mechanism and selection mechanism pick up the straw and carry the bundling machine of supporting use with it, can pick up the straw through pickup mechanism's bullet tooth, it picks up and tentatively screens the straw to play the tooth, when the straw is upwards carried by conveying mechanism, when upwards carrying the straw through the link joint, carry out the screening of second time to the straw, make soil, impurity such as stone and snow fall back to ground, when the straw is through selection mechanism, carry out the screening of third time to the straw, make the impurity that mix with in the straw filtered away through the screening of cubic like this, protect subsequent bundling mechanism, prevent to cause the damage, and make the straw bundle non-impurity, humidity is low.

2. This application can be better filter impurity, shake off the impurity in the material of feeding bundling mechanism, reach and improve the material cleanliness, reduce the purpose of soil stone impurity. The straw bundle recycling device improves the operation efficiency, greatly improves the operation environment, and provides reliable guarantee for secondary utilization of subsequent straw bundles. Because of this application can filter the clamp matter snow in the straw, so winter snow ground can the operation, and is efficient, and the working period lengthens, and is profitable.

Drawings

Fig. 1 is a schematic view of the overall structure of the mechanism of the present application.

Fig. 2 is another angle overall structure diagram of the mechanism of the present application.

Fig. 3 is a partially enlarged view of the pickup mechanism of the present application.

Fig. 4 is a partially enlarged view of the drive mechanism of the present application.

FIG. 5 is an enlarged view of a portion of one end of the beneficiation machinery of the present application.

FIG. 6 is an enlarged view of a portion of the other end of the culling mechanism of the application.

Detailed Description

In order to solve the problem that impurities such as soil, stones, snow and the like are contained in the picking mechanism of the straw bundling machine in the prior art, the straw picking mechanism is invented. This application can be better filter impurity, can realize the operation in the snow field, increase northeast area straw bundling machine activity duration, improve economic benefits.

The present application will now be described in detail with reference to the accompanying drawings:

this application carefully transport mechanism is picked up to straw uses with the straw bundling machine is supporting, mainly picks up and screens the straw for the bundling machine, carries the straw of non-impurity for the bundling machine.

As shown in the attached figures 1 and 2,

the utility model provides a choice conveying mechanism is picked up to straw, includes frame 1, actuating mechanism 2, pick up mechanism 3, conveying mechanism 4 and choice mechanism 5 from the bottom up and install in proper order in frame 1, actuating mechanism 2 drives pick up mechanism 3, conveying mechanism 4 and the work of choice mechanism 5.

The straw is picked up through the picking mechanism, conveyed upwards through the conveying mechanism, carefully selected through the carefully selecting mechanism, and finally conveyed to the matched bundling machine through the clean and impurity-free straw.

Pickup mechanism 3 includes two side-mounting boards 31, two discs 32, pickup mechanism primary shaft 33, pickup mechanism secondary shaft 34, picks up bullet tooth 35, guard ring 36, pickup mechanism primary shaft 33 both ends pass disc 32 center and with disc 32 fixed connection, pickup mechanism primary shaft 33 both ends are passed through the bearing frame with side-mounting board 31 center and are rotated and be connected. The number of the second picking-up mechanism shafts 34 is multiple, two ends of each second picking-up mechanism shaft 34 are connected with the outer ring of the disc 32, each second picking-up mechanism shaft 34 is of a groove-shaped structure, the picking-up elastic teeth 35 are arranged in the groove-shaped structures, and the second picking-up mechanism shafts 34 are connected with the picking-up elastic teeth 35 through bolts. The first shaft of the picking mechanism is driven by the driving mechanism to rotate, so that the disc is driven to rotate, the second shaft of the picking mechanism is driven by the disc to rotate, the second shaft of the picking mechanism drives the picking spring teeth to rotate, so that the straw is picked up, and the straw is upwards rotated along with the picking spring teeth and conveyed to the conveying mechanism.

The picking mechanism further comprises a plurality of protection rings, a protection ring 36 is arranged between every two adjacent picking elastic teeth, and the upper end and the lower end of each protection ring 36 are respectively connected with the frame 1 between the picking mechanism 3 and the conveying mechanism 4 through bolts. The protection ring protects the picking mechanism and prevents picked straws from falling off in the conveying process.

This application is carried out the straw through picking up to play the tooth and picks up, picks up to play the tooth when picking up the straw, can pick up the straw that buries below snow or soil to pick up, can remove some impurity like this.

As shown in figures 1, 2 and 3,

the two ends of the second shaft 34 of the pickup mechanism are connected with a circular shaft (not shown in the figure), the circular shaft penetrates through the disc 32 and is connected with the disc 32 through a bearing seat, the other end of the circular shaft is welded with a rocker arm 37, and the other end of the rocker arm 37 is connected with a bearing 38 through a shaft. The shaft is fixed to the rocker arm by a bolt or the like.

The periphery of the side mounting plate 31 is a slideway 39, a bearing 38 (equivalent to a sliding block) slides in the slideway 39, the part of the slideway 39, which is adjacent to the conveying mechanism, is of a vertical structure, and the rest part is of an arc structure.

The slide on the side-mounting board guides the second shaft of the picking mechanism, and then guides the picking elastic teeth to keep vertical direction rotating downwards when rotating to a position close to the conveying mechanism, so that the picking elastic teeth are prevented from touching the rack between the conveying mechanism and the picking mechanism and being abraded.

And a protective sleeve 311 is arranged on the periphery of the side mounting plate 31 and the disc through bolts.

As shown in figures 1, 2, 3 and 4,

the driving mechanism 2 comprises a driving shaft 21 and a driving chain wheel 22, the driving shaft 21 is arranged at the forefront of the conveying mechanism and is driven by the power of a tractor, and the driving chain wheel is arranged at one end of the driving shaft 21. The drive sprocket 22 drives the picking mechanism 3, the conveying mechanism 4 and the refining mechanism 5 to operate through chains. The drive structure and the first sprocket attachment portion may be protected by a protective cover 45.

The conveying mechanism 4 comprises a first conveying shaft 41, a second conveying shaft 42, a chain plate 43, a chain, a first chain wheel 44, a second chain wheel (not shown in the figure and on the inner side of the first chain wheel), a third chain wheel (not shown in the figure), a fourth chain wheel (not shown in the figure) and a fifth chain wheel (not shown in the figure), the two ends of the first conveying shaft 41 and the second conveying shaft 42 are respectively fixed on the frame through bearing blocks, the first chain wheel 44 and the second chain wheel are fixed at one end of the first conveying shaft 41, the third chain wheel is fixed at the other end of the first conveying shaft 41, the fourth chain wheel is fixed at one end of the second conveying shaft 42, the fifth chain wheel is fixed at the other end of the second conveying shaft 42, the driving chain wheel 22 drives the first chain wheel to rotate through a chain, the second chain wheel is connected with the fourth chain wheel through a chain, the third chain wheel is connected with the fifth chain wheel through a chain, and two ends of the plurality of transverse chain plates 43 are fixedly connected with the chain respectively.

The driving shaft rotates to drive the driving chain wheel to rotate, the driving chain wheel 22 drives the first chain wheel to rotate 44, the first chain wheel drives the conveying first shaft to rotate, the conveying first shaft drives the second chain wheel to rotate and the third chain wheel to rotate, the second chain wheel drives the fourth chain wheel to rotate through a chain, and the third chain wheel drives the fifth chain wheel to rotate through a chain. And a plurality of chain plates fixed on the chain between the second chain wheel and the fourth chain wheel and the chain between the third chain wheel and the fifth chain wheel rotate upwards, so that the straws placed on the chain plates are driven to be transported upwards until the selection mechanism.

As shown in the attached figures 1 and 2,

the conveying mechanism 4 further comprises an auxiliary conveying mechanism 6, the auxiliary conveying mechanism 6 comprises an auxiliary transmission shaft 61, an auxiliary conveying frame 62, a transmission chain 63 and a pressure bearing wheel 64, a bearing seat 65 is mounted on the auxiliary transmission shaft 61 through a bearing, the auxiliary conveying frame 62 comprises more than two longitudinal beams 621, one end of each longitudinal beam 621 is connected with the bearing seat 65 on the auxiliary transmission shaft 61, and the other ends of all the longitudinal beams 621 are connected with a cross beam 622.

The utility model discloses a straw lifting device, including auxiliary transmission shaft 61, bearing seat 65, crossbeam 622, auxiliary conveying mechanism, auxiliary transmission shaft 61, supplementary transmission mechanism, auxiliary chain wheel 67, a plurality of crossbearers 6211, the last bearing wheel that installs of crossbearer 6211, bearing wheel arrange below the last chain of conduction chain 63, even fixed mounting has the straw to carry on the conduction chain 63 and draws piece 6212, supplementary conveying mechanism second chain wheel 68 of installation on the crossbeam 622, supplementary conveying mechanism first chain wheel 67 drives supplementary conveying mechanism second chain wheel 68 through the conduction chain, be equipped with a plurality of crossbearers 6211 on the longeron 621. The pressure-bearing wheel can support the transmission chain and can press the straws to prevent splashing. The straw is carried and is drawn the piece and install on the conduction chain, when this application equipment operation, can upwards carry and draw the straw, prevents to drop.

A plurality of arc pressing strips 69 extending backwards are fixedly connected to the cross beam 622. The pressing strips can press the straws, so that the straws are prevented from splashing around after being separated from the conveying mechanism.

The straw is arranged between the conveying mechanism and the auxiliary conveying mechanism and conveyed upwards, impurities fall off under the action of gravity, and the straw can be conveyed upwards through the conduction chain.

A seventh sprocket (not shown) is mounted on the second conveying shaft 42 outside the fifth sprocket.

After the two ends of the first picking mechanism shaft 33 of the picking mechanism 3 pass through the side mounting plate 31, a first picking mechanism chain wheel (not shown) and a second picking mechanism chain wheel (not shown) are mounted at one end, and an auxiliary conveying mechanism chain wheel (not shown) is mounted at one end of the auxiliary transmission shaft of the auxiliary conveying mechanism 6. The seventh chain wheel drives the first chain wheel of the picking mechanism to rotate through a chain, the first chain wheel of the picking mechanism drives the second chain wheel of the picking mechanism to rotate through the first shaft of the picking mechanism, the second chain wheel of the picking mechanism drives the chain wheel of the auxiliary conveying mechanism to rotate through the chain, and the chain wheel of the auxiliary conveying mechanism drives the auxiliary transmission shaft to rotate.

As shown in the attached figure 1 of the drawings,

the auxiliary conveying mechanism 6 further comprises a lifting frame 66, the lifting frame 66 comprises a lifting frame 661 and a chain 662, the lifting frame 66 is fixed on the rack 1 on the side face of the chain plate, and the lifting frame 661 and the auxiliary conveying frame 62 are connected through the chain 662. The lifting frame can prevent the auxiliary conveying frame from vibrating during operation of the equipment.

As shown in figures 5 and 6 of the drawings,

the fine selecting mechanism 5 comprises a fine selecting frame 51 and a kickoff device 52. The fine selection frame 51 comprises a peripheral frame 511, the frame 511 is obliquely fixed on the frame 1 at the tail end of the conveying mechanism, and a plurality of longitudinal rods 512 which are mutually spaced are fixed in the frame 511. The straw that passes through conveying mechanism is given bundling machine after the choice mechanism, and the straw is after the choice mechanism, and choice frame utilizes the gap in the middle of can screening the straw.

The material shifting device 52 comprises a material shifting pipe 53, a material shifting rod 54, a material shifting transverse shaft (not shown in the figure), two material shifting transmission shafts 56, a material shifting chain wheel 57, two rocker arms 58 and an auxiliary connecting frame 59. Two material stirring transmission shafts 56 are respectively fixed on two sides of the rack 1 through bearing seats, a material stirring chain wheel 57 is arranged on the outer end of one material stirring transmission shaft 56 and is connected with a sixth chain wheel 49 arranged on a first conveying shaft through a chain, one end of a rocker arm 58 is welded at the inner end of the material stirring transmission shaft 56, the other end of the rocker arm 58 is welded with a material stirring cross shaft 55, a material stirring pipe 53 is sleeved on the material stirring cross shaft, a material stirring rod 57 is welded on the material stirring pipe 53, and the material stirring rod 57 is arranged in a gap between longitudinal rods 511 of the fine selection rack 51. The auxiliary connecting frame 59 is L-shaped, the upper end of the auxiliary connecting frame 59 is fixedly connected with the material stirring pipe 53, the other end of the auxiliary connecting frame 59 is hinged with the frame 1, namely, the auxiliary connecting frame and the frame can rotate relatively, and the vertical plate 591 of the auxiliary connecting frame 59 is hinged with the transverse plate 592, namely, the vertical plate and the transverse plate can rotate relatively. In the attached drawings, the material poking rod is triangular.

The rotation of carrying the primary shaft drives the sixth sprocket and rotates, and the sixth sprocket drives through the chain and dials the material sprocket and rotate, and then drives and dials the material transmission shaft and rotate, drives to dial the material cross axle and rotates, dials the material cross axle and drives the stirring pipe and the stirring rod removal of cover outside, can stir the straw that gets off from conveying mechanism to bundling machine direction.

The fine selection mechanism 5 further comprises an auxiliary material poking device 7, and the auxiliary material poking device 7 comprises an auxiliary material poking first chain wheel 71, an auxiliary material poking second chain wheel 72, an auxiliary material poking third chain wheel 73, a connecting rod 74, an auxiliary material poking transmission shaft 75, a rocker arm 76, an auxiliary material poking connecting shaft 77, an auxiliary material poking rod 78 and an auxiliary material poking pipe 79.

The auxiliary material stirring device is characterized in that an auxiliary material stirring second chain wheel 72 is arranged on the outer side of a third chain wheel on the conveying first shaft 41, a third chain wheel shaft 731 is arranged on the machine frame, an auxiliary material stirring third chain wheel 73 is arranged on the third chain wheel shaft 731, the auxiliary material stirring second chain wheel 72 is connected with the auxiliary material stirring third chain wheel 73 through an auxiliary chain 711, the auxiliary material stirring first chain wheel 71 is arranged below the auxiliary chain 711 and is driven to rotate by the auxiliary chain, the auxiliary material stirring first chain wheel 71 is arranged on an auxiliary material stirring transmission shaft 75, the auxiliary material stirring transmission shaft 75 is arranged on the machine frame through a bearing seat, the other end of the auxiliary material stirring transmission shaft 75 is welded with a rocker arm 76, the other end of the rocker arm 76 is welded with one end of an auxiliary material stirring connection shaft 77, an auxiliary material stirring pipe 79 is sleeved on the auxiliary material stirring connection shaft 77, and the auxiliary material stirring pipe is welded with an auxiliary material stirring rod 78.

The upward extension part of the auxiliary material-poking rod 78 at the outer side is hinged with one end of the connecting rod 74, and the other end of the connecting rod 74 is hinged with the machine frame 1. Or the auxiliary material stirring pipe is connected with an upward extending beam 80, the upward extending beam is hinged with a connecting rod, and the other end of the connecting rod is hinged with an extending frame 11 fixed on the machine frame.

When the straws are piled up at two sides of the fine selection frame, the auxiliary material poking device can be used for poking the straws towards the direction of the bundling machine.

And hydraulic cylinders 8 are arranged on two sides of the rack, one end of each hydraulic cylinder is connected with a bracket below the rack, and the other end of each hydraulic cylinder is connected with the side surface of the rack. The hydraulic cylinders on two sides of the frame can lift or put down the pick-up mechanism, and the height between the pick-up mechanism and the ground can be adjusted.

The use process comprises the following steps:

the driving shaft is driven by the power of a tractor to rotate, the driving shaft drives a first chain wheel on a conveying first shaft to rotate through a chain, the first chain wheel drives the conveying first shaft to rotate, the conveying first shaft drives a second chain wheel, a third chain wheel and a sixth chain wheel to rotate, the second chain wheel and the third chain wheel respectively drive a fourth chain wheel and a fifth chain wheel which are installed on a conveying second shaft to rotate through the chain, and then chain plates fixedly connected with the chain are driven to rotate.

The conveying second shaft rotates to drive the seventh chain wheel to rotate, the seventh chain wheel drives the picking mechanism first shaft of the picking mechanism to rotate and the auxiliary conveying mechanism chain wheel to rotate sequentially through the picking mechanism first chain wheel and the picking mechanism second chain wheel, and then the picking mechanism and the auxiliary conveying device are enabled to rotate.

The straw is picked up by the picking mechanism and is conveyed upwards by the conveying mechanism and the auxiliary conveying mechanism. When the straws reach the tail end of the conveying mechanism, the straws are conveyed to the fine selection mechanism, and then conveyed to the rear bundling mechanism for bundling through the material poking device and the auxiliary material poking device.

Claims

1. The utility model provides a choice conveying mechanism is picked up to straw which characterized in that: including frame, actuating mechanism, pickup mechanism, conveying mechanism and selection mechanism from the bottom up install in the frame in proper order, actuating mechanism drives pickup mechanism, conveying mechanism and selection mechanism work.

2. The straw pick-up, selecting and conveying mechanism as claimed in claim 1, wherein: the picking mechanism comprises two side mounting plates, two discs, a first picking mechanism shaft, a second picking mechanism shaft, picking elastic teeth and a protective ring, two ends of the first picking mechanism shaft penetrate through the centers of the discs and are fixedly connected with the discs, two ends of the first picking mechanism shaft are rotatably connected with the centers of the side mounting plates through bearing seats,

the two ends of the second shaft of the picking mechanism are connected with the outer ring of the disc, the second shaft of the picking mechanism is of a groove-shaped structure, the picking elastic teeth are arranged in the groove-shaped structure, and the second shaft of the picking mechanism is connected with the picking elastic teeth through bolts;

and a protective ring is arranged between every two adjacent picking elastic teeth, and the upper end and the lower end of the protective ring are respectively connected with a rack bolt between the picking mechanism and the conveying mechanism.

3. The straw pick-up, selecting and conveying mechanism as claimed in claim 2, wherein: the two ends of a second shaft of the picking mechanism are connected with round shafts, the round shafts penetrate through the discs and are connected with the discs through bearing seats, rocker arms are welded at the other ends of the round shafts, and the other ends of the rocker arms are connected with bearings through shafts;

the periphery of the side mounting plate is provided with a slide way, a bearing slides in the slide way, the part of the slide way, which is adjacent to the conveying mechanism, is of a vertical structure, and the rest part of the slide way is of an arc-shaped structure.

4. The straw pick-up, selecting and conveying mechanism as claimed in claim 1, wherein:

the driving mechanism comprises a driving shaft and a driving chain wheel, and the driving chain wheel is arranged at one end of the driving shaft;

conveying mechanism is including carrying the primary shaft, carrying secondary shaft, link joint, chain, first sprocket, second sprocket, third sprocket, fourth sprocket, fifth sprocket, and drive sprocket passes through the chain and drives first sprocket and rotate, carry the primary shaft and carry the secondary shaft both ends to fix in the frame through the bearing frame respectively, first sprocket and second sprocket are fixed in the one end of carrying the primary shaft, and the third sprocket is fixed at the other end of carrying the primary shaft, and the fourth sprocket is fixed in the one end of carrying the secondary shaft, and the other end at carrying the secondary shaft is fixed to the fifth sprocket, second sprocket and fourth sprocket pass through the chain and connect, and third sprocket and fifth sprocket pass through the chain and connect, and a plurality of horizontal link joint both ends respectively with chain fixed connection.

5. The straw pick-up, selecting and conveying mechanism as claimed in claim 4, wherein: the conveying mechanism further comprises an auxiliary conveying mechanism, the auxiliary conveying mechanism comprises an auxiliary transmission shaft, an auxiliary conveying frame, a transmission chain and a pressure bearing wheel, a bearing seat is arranged on the auxiliary transmission shaft through a bearing, the auxiliary conveying frame comprises more than one longitudinal beam, one end of each longitudinal beam is connected with the bearing seat on the auxiliary transmission shaft, and the other end of each longitudinal beam is connected with the cross beam;

an auxiliary conveying mechanism first chain wheel is installed on the side face of the bearing seat on the auxiliary transmission shaft, an auxiliary conveying mechanism second chain wheel is installed on the cross beam, the auxiliary conveying mechanism first chain wheel drives the auxiliary conveying mechanism second chain wheel through a transmission chain, a plurality of cross frames are arranged on the longitudinal beam, pressure bearing wheels are installed on the cross frames and are arranged below upper chains of the transmission chain, and straw pulling pieces are uniformly and fixedly installed on the transmission chain;

a plurality of arc pressing strips extending backwards are fixedly connected to the cross beam.

6. The straw pick-up, selecting and conveying mechanism as claimed in claim 5, wherein: the auxiliary conveying mechanism further comprises a lifting frame, the lifting frame comprises a lifting frame and a chain, the lifting frame is fixed on the rack on the side face of the chain plate, and the lifting frame is connected with the auxiliary conveying frame through the chain.

7. The straw pick-up, selecting and conveying mechanism as claimed in claim 1, wherein:

the fine selection mechanism comprises a fine selection frame and a material poking device,

the fine selection frame comprises a peripheral frame, the frame is obliquely fixed on the rack, and a plurality of longitudinal rods with gaps are fixed in the frame;

the material shifting device comprises a material shifting pipe, a material shifting rod, a material shifting transverse shaft, two material shifting transmission shafts, a material shifting chain wheel, two rocker arms and an auxiliary connecting frame;

two material shifting transmission shafts are respectively fixed on two sides of the frame through bearing seats, a material shifting chain wheel is arranged on the outer end of one of the material shifting transmission shafts, the material shifting chain wheel is connected with a sixth chain wheel arranged on the first conveying shaft through a chain,

one end of a rocker arm is welded at the inner end of the material poking transmission shaft, the other end of the rocker arm is welded with the material poking cross shaft, the material poking pipe is sleeved on the material poking cross shaft, a material poking rod is welded on the material poking pipe, and the material poking rod is arranged in a gap between the longitudinal rods of the fine selection frame;

the auxiliary connecting frame is L-shaped, the upper end of the auxiliary connecting frame is fixedly connected with the material stirring pipe, the other end of the auxiliary connecting frame is hinged with the rack, and the longitudinal plate and the transverse plate of the auxiliary connecting frame are hinged.

8. The straw pick-up, winnowing and conveying mechanism as claimed in claim 7, wherein: the fine selection mechanism also comprises an auxiliary material poking device, the auxiliary material poking device comprises an auxiliary material poking first chain wheel, an auxiliary material poking second chain wheel, an auxiliary material poking third chain wheel, a connecting rod, an auxiliary material poking transmission shaft, a rocker arm, an auxiliary material poking connecting shaft, an auxiliary material poking rod and an auxiliary material poking pipe,

an auxiliary material shifting second chain wheel is mounted on the outer side of a third chain wheel on the first conveying shaft, an auxiliary material shifting connecting shaft is mounted on the machine frame, an auxiliary material shifting third chain wheel is mounted on the auxiliary material shifting connecting shaft, the auxiliary material shifting second chain wheel is connected with the auxiliary material shifting third chain wheel through an auxiliary chain, the auxiliary material shifting first chain wheel is arranged below the auxiliary chain and driven to rotate by the auxiliary chain, the auxiliary material shifting first chain wheel is mounted on an auxiliary material shifting transmission shaft, the auxiliary material shifting transmission shaft is mounted on the machine frame through a bearing seat, a rocker arm is welded to the other end of the auxiliary material shifting transmission shaft, one end of the auxiliary material shifting connecting shaft is welded to the other end of the rocker arm, the auxiliary material shifting pipe is sleeved on the auxiliary material shifting connecting shaft, and an auxiliary material shifting rod is welded to the auxiliary material shifting pipe;

the upward extending part of the auxiliary material poking rod on the outer side is hinged with one end of a connecting rod, and the other end of the connecting rod is hinged with an extending frame fixed on the machine frame.