CN210641280U

CN210641280U - Detachable residual film recovery device of straw returning machine

Info

Publication number: CN210641280U
Application number: CN201921660716.9U
Authority: CN
Inventors: 张朝书
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-10-06
Filing date: 2019-10-06
Publication date: 2020-06-02
Anticipated expiration: 2029-10-06

Abstract

The application relates to the technical field of agricultural residual film recycling machinery, in particular to a separable residual film recycling device of a straw returning machine, which comprises a film collecting machine body and a straw returning device which is positioned at the front end of the film collecting machine body and can be separated; the straw returning device comprises a returning frame, a returning gearbox and a straw crushing device with a flail knife. This application is rational in infrastructure and compact, high durability and convenient use, it is through returning the field link, receive the membrane link, adjust the pull rod and connect the still field device of straw, and can conveniently realize the separation, convenient to use person selects the tractor operation of big horsepower or medium horsepower, the unmatched problem of tractor power and incomplete membrane recovery unit power has effectively been solved, this application is still through setting up row miscellaneous hole and replacing the sprocket with the pulley, make equipment can overcome incomplete membrane and block up the sprocket hole, make the nail tooth chain belt can high-efficient operation that lasts, the suitability is good, incomplete membrane recovery is effectual, equipment operating efficiency is high, and the safety, laborsaving, simple and convenient, efficient characteristics are had.

Description

Detachable residual film recovery device of straw returning machine

Technical Field

The application relates to the technical field of agricultural residual film recycling machinery, in particular to a separable residual film recycling device of a straw returning machine.

Background

The agricultural mulching film is widely applied to mulching planting of various crops, particularly cotton planting, but needs to be timely and effectively recovered so as to avoid environmental pollution and soil hardening and degeneration caused by the environmental pollution. In order to avoid the influence of field straws on residual film recovery after autumn, cotton straws are usually crushed and returned to the field before the residual film recovery, the field straws are independently returned to the field, the agricultural time is consumed, and the corresponding operation cost is high. The existing integrated plastic film residue recycling machine capable of returning cotton straws to fields and recycling plastic film residues on the market is high in efficiency, but the machine is usually large in size and high in power consumption, the power requirement of a tractor for towing the machine to operate is high, the power of the existing agricultural tractor is often not matched with the power of the plastic film residue recycling machine, for example, a common 80-90 horsepower medium-sized tractor cannot tow the machine to operate normally, a newly purchased large-horsepower tractor is high in cost, and the resource of the existing medium-sized tractor is idle. In addition, the current incomplete membrane that adopts spike-tooth chain belt incomplete membrane collection device retrieves machinery, the teeth of a cogwheel of sprocket often twines the incomplete membrane, and pile up the incomplete membrane in the sprocket of conveying chain, cause the sprocket blockage of conveying chain, lead to the conveying chain to take place to jump the tooth in sprocket department, or when only blocking up the incomplete membrane in the sprocket of a side sprocket department, this side of spike-tooth chain belt is heightened by the incomplete membrane pad, the left and right stress that the conveying chain side was drawn that leads to is uneven, influence spike-tooth chain belt life, easily cause its damage, the maintenance has to shut down even, seriously influence the operation progress.

Disclosure of Invention

An object of this application provides a straw returning machine detachable incomplete membrane recovery unit, has overcome above-mentioned prior art not enough, and it can effectively solve the incomplete membrane of current area straw returning machine and retrieve the machinery size great, consume power many, mismatch with tractor power, cause the idle problem of existing medium-sized tractor.

The application has still further solved the chain hole of current nail tooth chain belt plastic film residue recovery unit's conveying chain and has easily blockked up the plastic film residue, the conveying chain easily takes place to jump the tooth or the side tensile stress is uneven, seriously influences nail tooth chain belt life's problem.

The purpose of the application is realized as follows: a separable residual film recovery device of a straw returning machine comprises a film collecting machine body and a straw returning device which is positioned at the front end of the film collecting machine body and can be separated; the straw returning device comprises a returning frame, a returning gearbox and a straw crushing device with a flail knife, wherein the front end of the returning frame is provided with a traction frame which can be connected with a tractor, the upper end of the returning frame is provided with a returning connection frame, the front part of the returning frame is provided with the returning gearbox, and the front lower part of the returning frame is provided with the straw crushing device; receive the membrane machine body including receiving the membrane frame, play membrane hobbing cutter device, nail area collection device, clear membrane device, it is equipped with and receives the membrane link to receive membrane frame front portion, it is connected and can separate with returning the field link to receive the membrane link to be connected through adjusting the pull rod, the front portion of receiving the membrane frame is equipped with and receives the membrane gearbox, the input shaft of receiving the membrane gearbox is connected and can separate with the output shaft of returning the field gearbox through the universal shaft, the front portion of receiving the membrane frame, the rear portion is equipped with respectively receives membrane depth roller, the membrane frame below of receiving behind the membrane depth roller is equipped with and plays membrane hobbing cutter device to anterior receipts, it is equipped with the nail area collection device that the outside equipartition was chosen membrane nail tooth to receive the membrane frame middle part, nail area collection device rear portion is equipped with the clear membrane device that can clear up.

Furthermore, the left side and the right side of the lower part of the front end of the film collecting connecting frame are respectively provided with a connecting lug seat, the left side and the right side of the rear end of the returning connecting frame are respectively fixed with an auxiliary frame rod and hinged on the connecting lug seats, the left side and the right side of the rear end of the returning connecting frame and the left side and the right side of the front end of the film collecting connecting frame are respectively provided with a pull rod lug seat, the adjusting pull rod comprises a front connecting rod, a rear pull rod and a threaded connecting sleeve, the front end of the front connecting rod is hinged on the pull rod lug seat of the returning connecting frame through a connecting pin, the outer side of the rear part of the front connecting rod is provided with a right-handed external thread, the outer side of the front part of the rear pull rod is provided with a left-handed external thread, the rear end of the rear pull rod is hinged on the pull rod lug seat of the film collecting connecting frame through the connecting pin; the straw returning device also comprises an auger device and a fan with a throwing pipe, the auger device is arranged on the returning frame behind the straw crushing device, the fan is arranged at the side end of the auger device, the middle part of the film collecting frame is provided with a walking wheel carrier with a lifting hydraulic cylinder, and the lower end of the walking wheel carrier is provided with a walking wheel through a wheel shaft.

Further, the nail belt collecting device comprises a nail belt lower shaft, a nail belt front shaft, a nail belt rear shaft and a self-demoulding nail tooth chain belt provided with a demoulding plate, the nail belt lower shaft is arranged below the film collecting rack, the left side and the right side of the nail belt lower shaft are respectively fixed with a nail belt lower chain wheel, the right part of the nail belt lower shaft is fixedly provided with a nail belt driving chain wheel which can be connected with the film collecting gearbox, the nail belt front shaft is arranged on the film collecting rack above the nail belt lower shaft, the left side and the right side of the nail belt front shaft are respectively provided with a nail belt pulley, the nail belt rear shaft is arranged on the film collecting rack behind the nail belt front shaft, the left side and the right side of the nail belt rear shaft are respectively provided with a nail belt upper chain wheel, the self-demoulding nail tooth chain belt is arranged on the nail belt lower chain wheel, the nail belt pulley and the nail belt upper chain wheel, the self-demoulding nail tooth chain belt between the nail belt lower shaft and the nail belt front shaft is arranged along the vertical direction and forms a nail belt vertical section, the nail belt front shaft and the self-demoulding nail tooth belt section between, a left belt roller, a right belt roller and a conveying belt are arranged in front of the lower part of the vertical section of the nail belt, the conveying belt is arranged on the left belt roller and the right belt roller and can convey materials to the left or right of the film collecting rack, the self-film-removing nail tooth chain belt comprises a left conveying chain and a right conveying chain, connecting rod and spike tooth pole, left and right conveying chain parallel arrangement and even interval are equipped with the connecting rod along left and right direction, both sides are fixed on the otic placode of the chain link of left and right conveying chain through the connecting rod bedplate respectively about the connecting rod, the deciduate board is fixed on the connecting rod, the chain hole position that corresponds between two rollers of each chain link on the connecting rod bedplate is equipped with connecting rod board row miscellaneous hole, be close to each connecting rod and be equipped with the spike tooth pole rather than parallel respectively, both sides are fixed on the otic placode of the chain link of left and right conveying chain through the ratch bedplate respectively about the spike tooth pole, choose the membrane spike tooth to fix on the spike tooth pole, the chain hole position that corresponds between two rollers of each chain link on the ratch bedplate is equipped with the ratch tooth board row miscellaneous hole.

Further, the film cleaning device is a scraper film removing device, the scraper film removing device comprises a lower chain belt shaft, a front chain belt shaft, a rear chain belt shaft and a film scraping chain belt, the lower chain belt shaft is arranged on a film collecting rack below the nail belt rear shaft, the left side and the right side of the lower chain belt shaft are respectively fixed with a chain belt lower pulley, the front chain belt shaft is close to the upper part of the rear end of the self-film removing nail tooth chain belt, the left side and the right side of the front chain belt shaft are respectively fixed with a chain belt front chain wheel, the rear chain belt shaft is arranged behind the front chain belt shaft, the left side and the right side of the rear chain belt shaft are respectively fixed with a chain belt rear pulley, the film scraping chain belt comprises a left film scraping chain, a right film scraping chain, a scraper seat rod and a film scraping plate, the left film scraping chain and the right film scraping chain are arranged in parallel and are uniformly spaced, the left side and the right side of the left and the left side of the scraper seat rod are respectively fixed on ear plates of chain links, and impurity removing holes of the scraping rod plate are arranged on the scraping rod seat plate corresponding to the chain holes between the two rollers of each chain link.

Further, the straw crushing device comprises a crushing cover plate, a crushing cutter shaft, the crushing cover plate is fixed on a returning machine frame, the crushing cutter shaft is arranged below the crushing cover plate through a bearing seat, at least two powder stalk cutter seat ring groups are uniformly distributed on the outer side of the crushing cutter shaft, each powder stalk cutter seat ring group comprises at least three throwing cutter seats, each throwing cutter seat is hinged with a throwing cutter through a pin shaft, a cutter shaft driving wheel which can be connected with a returning gearbox is fixedly arranged at the left end of the crushing cutter shaft, the auger device comprises an auger housing, an auger rotating shaft and auger blades, the auger housing is fixedly arranged on the returning machine frame behind the crushing cutter shaft, the auger rotating shaft with the auger blades is arranged in the auger housing, a feeding port is arranged at the front part of the auger housing, a fan is arranged at the side end of the auger housing, the rotating shaft of the fan is connected with, the outlet of the scattering pipe is positioned at the rear side of the returning frame, the left end of the auger rotating shaft is fixedly provided with an auger driving wheel, the right part of the crushing cutter shaft is fixedly provided with a cutter shaft driving wheel, the cutter shaft driving wheel is connected with the auger driving wheel through a driving belt, and the returning depth limiting roller is arranged below the rear part of the returning frame.

Further, the film lifting hobbing cutter device comprises a front shifting shaft, a hobbing cutter holder and a hobbing cutter blade, a left side plate and a right side plate are respectively fixed at the left end and the right end below the front part of the film collecting rack, the left side and the right side of the front shifting shaft are respectively installed on the left side plate and the right side plate through bearings, at least three shifting plates are uniformly distributed and fixed on the circumference of the outer side of the front shifting shaft, a shifting shaft driving wheel is fixedly installed at the left end of the front shifting shaft, an output shaft of a film collecting gearbox comprises a left film collecting output shaft and a right film collecting output shaft, the shifting shaft driving wheel is connected with the left film collecting output shaft through a transmission belt, the hobbing cutter shaft is arranged below the rear part of the front shifting shaft, the left side and the right side of the hobbing cutter shaft are respectively installed on the left side plate and the right side plate through bearings, the film collecting right output shaft is connected with the driving gear through a connecting shaft, the driven gear is fixedly installed at the right end of the hob shaft, hob seats are uniformly fixed on the outer side of the hob shaft corresponding to the position between two lines of cotton plants, and hob blades are fixedly installed on the hob seats through screws.

Further, a second-stage roller conveying device is arranged on a film collecting rack between the film lifting hob device and the nail belt collecting device and comprises a front conveying roller shaft and a rear conveying roller shaft, the front conveying roller shaft is installed on the film collecting rack through a bearing seat, the rear conveying roller shaft is arranged on the film collecting rack behind the front conveying roller shaft, conveying shifting plates are uniformly distributed and fixed on the outer circumference of the rear conveying roller shaft respectively, a rear conveying roller driving wheel is fixed at the right end of the rear conveying roller shaft and connected with a transmission gear of a transmission gear set through a transmission chain, a rear conveying roller left driving wheel is fixed at the left end of the rear conveying roller shaft, a front conveying roller driving wheel is fixed at the left end of the front conveying roller shaft, and the front conveying roller driving wheel is connected with a rear conveying roller right driving wheel through the transmission chain.

The film collecting machine comprises a film collecting rack, a film discharging chain belt assembly, a film discharging chain belt, a self-discharging film collecting box, a collecting box and a film discharging chain belt assembly, wherein the film collecting box is fixed at the upper end of the box body seat frame, a front film discharging shaft is installed at the front end of the box body seat frame, a rear film discharging shaft is installed at the rear end of the box body seat frame, a hydraulic motor is fixed at the rear part of the left end of the box body seat frame through a motor seat frame, a power shaft of the hydraulic motor is connected with the left end of the rear film discharging shaft, the film discharging chain belt assembly comprises a discharging chain belt and poking and conveying rods, the poking and conveying rods in the left and right directions are evenly fixed on the discharging chain belt at intervals, the front part of the discharging chain belt is installed on the front film discharging shaft, the rear part of the discharging chain belt is installed on the rear film discharging shaft.

This application is rational in infrastructure and compact, high durability and convenient use, it is through returning the field link, receive the membrane link, adjust the pull rod and connect the still field device of straw, and can conveniently realize the separation, convenient to use person selects the tractor operation of big horsepower or medium horsepower, the unmatched problem of tractor power and incomplete membrane recovery unit power has effectively been solved, this application is still through setting up row miscellaneous hole and replacing the sprocket with the pulley, make equipment can overcome incomplete membrane and block up the sprocket hole, make the nail tooth chain belt can high-efficient operation that lasts, the suitability is good, incomplete membrane recovery is effectual, equipment operating efficiency is high, and the safety, laborsaving, simple and convenient, efficient characteristics are had.

Drawings

The specific structure of the application is given by the following figures and examples:

FIG. 1 is a schematic front view of the preferred embodiment of the present application;

FIG. 2 is a schematic top view of the structure of FIG. 1;

FIG. 3 is an enlarged schematic view of the structure at A in FIG. 2;

fig. 4 is an axial schematic view of the preferred embodiment of the present application.

Legend: 1 is a returning frame, 2 is a returning gearbox, 3 is a flail knife, 4 is a throwing pipe, 5 is a fan, 6 is a traction frame, 7 is a returning connection frame, 8 is a film collecting frame, 9 is a film collecting connection frame, 10 is an adjusting pull rod, 11 is a film collecting gearbox, 12 is a universal shaft, 13 is a film picking spike tooth, 14 is a stripping plate, 15 is a crushing cover plate, 16 is a crushing cutter shaft, 17 is a cutter shaft driving wheel, 18 is a auger rotating shaft, 19 is an auger driving wheel, 20 is a cutter shaft driving wheel, 21 is a returning depth limiting roller, 22 is a front shifting shaft, 23 is a roller shaft, 24 is a left side plate, 25 is a shifting shaft driving wheel, 26 is a film collecting left output shaft, 27 is a film collecting right output shaft, 28 is a connecting shaft, 29 is a front conveying roller shaft, 30 is a rear conveying roller shaft, 31 is a rear conveying roller driving wheel, 32 is a rear conveying roller right driving wheel, 33 is a front conveying roller driving wheel, 34 is a nail belt lower shaft, and 35 is a nail belt front, 36 is a nail belt rear shaft, 37 is a connecting lug seat, 38 is a self-stripping nail toothed chain belt, 39 is a nail belt lower chain wheel, 40 is a nail belt driving chain wheel, 41 is a nail belt pulley, 42 is a nail belt upper chain wheel, 43 is a left belt roller, 44 is a right belt roller, 45 is a conveying belt, 46 is a connecting rod, 47 is a nail toothed bar, 48 is a connecting rod seat plate, 49 is a connecting rod plate impurity removing hole, 50 is a toothed bar seat plate, 51 is a toothed bar plate impurity removing hole, 52 is a lower chain belt shaft, 53 is a front chain belt shaft, 54 is a rear chain belt shaft, 55 is a chain belt lower pulley, 56 is a chain belt front chain wheel, 57 is a chain belt rear pulley, 58 is a scraping blade seat rod, 59 is a scraping film sheet, 60 is a scraping rod seat plate, 61 is a scraping rod plate impurity removing hole, 62 is a box body seat frame, 63 is a collecting box, 64 is a hydraulic motor, 65 is a discharging chain belt and 66 is a poking rod.

Detailed Description

The present application is not limited to the following examples, and specific implementations may be determined according to the technical solutions and practical situations of the present application.

Example (b): as shown in fig. 1-4, the separable residual film recycling device of the straw returning machine comprises a film collecting machine body and a straw returning device which is positioned at the front end of the film collecting machine body and can be separated; the straw returning device comprises a returning frame 1, a returning gearbox 2 and a straw crushing device with a flail knife 3, wherein the front end of the returning frame 1 is provided with a traction frame 6 which can be connected with a tractor, the upper end of the returning frame 1 is provided with a returning connecting frame 7, the front part of the returning frame 1 is provided with the returning gearbox 2, and the front lower part of the returning frame 1 is provided with the straw crushing device; receive the membrane machine body including receiving membrane frame 8, play membrane hobbing cutter device, nail area collection device, clear membrane device, it is equipped with and receives membrane link 9 to receive membrane frame 8 front portion, it is connected and can separate with returning field link 7 through adjusting the pull rod 10 to receive membrane link 9, the front portion of receiving membrane frame 8 is equipped with receives membrane gearbox 11, the input shaft that receives membrane gearbox 11 is connected and can separate with the output shaft that returns field gearbox 2 through cardan shaft 12, it is anterior to receive membrane frame 8, the rear portion is equipped with respectively receives the membrane gauge roller, it is equipped with play membrane hobbing cutter device to receive membrane frame 8 below the membrane gauge roller rear portion to receive the front portion, it is equipped with the nail area collection device that the membrane tooth 13 was chosen to the equipartition in the outside to receive membrane frame 8 middle part, nail area collection device rear portion is equipped with the clear membrane device that can clear up the incomplete membrane that its nail tooth hung. The film cleaning device can be a rubber roller type or brush roller type or scraper type film cleaning device which is commonly known at present, the application is characterized in that a straw returning device and a film collecting rack 8 are connected through a returning connecting frame 7, a film collecting connecting frame 9 and an adjusting pull rod 10, the returning gearbox 2 and the film collecting gearbox 11 are connected through a universal shaft 12, the straw returning device can be conveniently separated when needed, a user can conveniently select to produce and operate through an existing high-horsepower tractor or a middle-horsepower tractor, the problem that the power of the existing agricultural tractor is not matched with that of a residual film recovery device is effectively solved, equipment can efficiently and normally operate, the applicability is good, the residual film recovery effect is good, and the equipment operation efficiency is high. Through practical use tests, the combined operation of straw crushing and residual film recycling can be carried out by the traction of a high-horsepower tractor with more than 120 horsepower, and the straw crushing and residual film recycling can be completed at one time; for a tractor with a medium horsepower of about 80-90 horsepower, after the straw returning device is separated, the tractor pulls the independent straw returning device to crush and return the straws, and then pulls the independent residual film recovery device to recover the residual films.

As shown in fig. 1, 2 and 4, the left and right sides of the lower part of the front end of the film collecting connecting frame 9 are respectively provided with a connecting lug seat 37, the left and right sides of the rear end of the returning connecting frame 7 are respectively fixed with an auxiliary frame rod and hinged on the connecting lug seat 37, the left and right sides of the rear end of the returning connecting frame 7 and the left and right sides of the front end of the film collecting connecting frame 9 are respectively provided with a pull rod lug seat, the adjusting pull rod 10 comprises a front connecting rod, a rear pull rod and a threaded sleeve, the front end of the front connecting rod is hinged on the pull rod lug seat of the returning connecting frame 7 through a connecting pin, the outer side of the rear part of the front connecting rod is provided with a right-handed external thread, the outer side of the front part of the rear pull rod is provided with a left-handed external thread, the rear end of the rear pull rod is hinged on the lug seat of the film collecting connecting frame 9 through a connecting pin, the front end of the; the straw returning device also comprises an auger device and a fan 5 with a scattering pipe 4, the auger device is arranged on the returning frame 1 behind the straw crushing device, the fan 5 is arranged at the side end of the auger device, the middle part of the film collecting frame 8 is provided with a walking wheel carrier with a lifting hydraulic cylinder, and the lower end of the walking wheel carrier is provided with a walking wheel through a wheel shaft. The travelling wheel is put down through the lifting hydraulic cylinder, so that the film-lifting hob device is far away from the ground, and the transportation is convenient to realize; through articulating auxiliary frame pole rear end on connecting ear seat 37, later through the length of rotatory thread nipple adjustment adjusting pull rod 10, can make still field link 7, receive membrane link 9 and keep parallel, when connecting traction frame 6 through the tractor and driving this application operation, can keep balance about the equipment, and is more steady reliable, still is convenient for the tractor through connecting ear seat 37 and pulls and receive the membrane machine body and carry out the operation alone.

As shown in fig. 2, 3 and 4, the nail belt collecting device comprises a nail belt lower shaft 34, a nail belt front shaft 35, a nail belt rear shaft 36 and a self-demoulding nail tooth chain belt 38 provided with a demoulding plate 14, the nail belt lower shaft 34 is arranged below a film collecting frame 8, nail belt lower chain wheels 39 are respectively fixed on the left side and the right side of the nail belt lower shaft 34, a nail belt driving chain wheel 40 capable of being connected with a film collecting gearbox 11 is fixedly arranged on the right part of the nail belt lower shaft 34, the nail belt front shaft 35 is arranged on the film collecting frame 8 above the nail belt lower shaft 34, nail belt pulleys 41 are respectively arranged on the left side and the right side of the nail belt front shaft 35, the nail belt rear shaft 36 is arranged on the film collecting frame 8 behind the nail belt front shaft 35, the nail belt upper chain wheels 42 are respectively arranged on the left side and the right side of the nail belt rear shaft 36, the self-demoulding nail tooth chain belt 38 is arranged on the nail belt lower chain wheels 39, the nail belt pulleys 41 and the nail belt 42, the nail belt lower shaft 34 and the nail belt front shaft 35 are arranged along the vertical direction to form, the self-demoulding nail tooth chain belt 38 between the nail belt front shaft 35 and the nail belt rear shaft 36 is arranged along the horizontal direction to form a nail belt horizontal section, a left belt roller 43, a right belt roller 44 and a conveying belt 45 are arranged in front of the lower part of the nail belt vertical section, the conveying belt 45 is arranged on the left belt roller 43 and the right belt roller 44 and can convey materials to the left or the right of the film collecting rack 8, the self-demoulding nail tooth chain belt 38 comprises a left conveying chain, a right conveying chain, a connecting rod 46 and a nail tooth rod 47, the left conveying chain and the right conveying chain are arranged in parallel and are uniformly provided with the connecting rods 46 along the left and the right direction at intervals, the left side and the right side of the connecting rod 46 are respectively fixed on lug plates of chain links of the left conveying chain and the right conveying chain through connecting rod seat plates 48, the demoulding plate 14 is fixed on the connecting rod 46, connecting rod seat plates 48 are provided with connecting rod plate impurity removing holes 49 corresponding to chain holes between two rollers of each, the left side and the right side of the spike rack rod 47 are respectively fixed on the ear plates of the chain links of the left conveying chain and the right conveying chain through a spike rack seat plate 50, the film picking spike teeth 13 are fixed on the spike rack rod 47, and a spike rack plate impurity removing hole 51 is arranged on the spike rack seat plate 50 corresponding to the chain hole position between two rollers of each chain link. The left belt roller 43 or the right belt roller 44 can be driven by a hydraulic motor or a film collecting gearbox 11, when the film collecting gearbox 11 is used for driving, as shown in fig. 4, a small gearbox can be arranged on the film collecting rack 8 at the rear end of the left belt roller 43, and a sprocket at the left end of the lower shaft 34 of the nail belt drives the small gearbox to rotate the left belt roller 43; the self-demoulding nail tooth chain belt 38 with the film-picking nail teeth 13 and the demoulding plate 14 is the prior known technology, a reset torsion spring which can enable the film-picking nail teeth 13 to be vertical to the outer side of a nail belt device is installed on a conveying chain of the self-demoulding nail tooth chain belt 38, the nail belt device is also provided with the demoulding plate 14 with a front-back direction long hole, the film-picking nail teeth 13 are sleeved in the long holes, the nail belt device is provided with a driving crank arm, a crank arm shifting plate is correspondingly installed on the film collecting rack 8 and pushes the driving crank arm to rotate so that the film-picking nail teeth 13 rotate to the lower side of the demoulding plate 14 to realize automatic demoulding; the nail belt pulley 41 is arranged on the nail belt front shaft 35 to replace a chain wheel, so that the situation that the residual film is wound on the gear teeth of the original chain wheel at the nail belt front shaft 35 and blocks the residual film in the chain holes of the left and right conveying chains of the self-film-removing nail tooth chain belt 38 can be avoided to the maximum extent, the phenomenon that the left and right conveying chains jump teeth at the original chain wheel or the self-film-removing nail tooth chain belt 38 is damaged due to the fact that the tensile stress on the left and right conveying chains is uneven due to the action of the residual film padding at one side chain wheel can be avoided, and the service life of the self-film-removing nail tooth chain belt is; the self-stripping film spike tooth chain belt 38 is arranged on a lower shaft 34 of the nail belt, a front shaft 35 of the nail belt and a rear shaft 36 of the nail belt and is approximately in a right-angled triangle shape, so that broken stubbles, partial soil and stones mixed in the residual film fall on the conveying belt 45 in the upward movement process in the process that the film picking inclined teeth 2 on the vertical section of the nail belt convey the hung residual film upwards, and the broken stubbles, partial soil and partial stones are conveyed to the left side or the right side of the equipment by the conveying belt 45 and fall to the ground; the residual film can be further cleaned at the horizontal section of the nail belt, and soil and stones mixed in the residual film fall to the ground at intervals from the nail belt due to vibration in the backward movement process of the horizontal section of the nail belt. During actual manufacturing, the link plate impurity discharging holes 49 and the rack bar plate impurity discharging holes 51 are preferably rectangular holes, the side length of each rectangular hole is preferably 1.2 times to 1.5 times of the corresponding chain hole, residual films hung on the corresponding chain wheels can be discharged through the link plate impurity discharging holes 49 and the rack bar plate impurity discharging holes 51, the phenomenon that the chain holes are blocked by the gear teeth of the chain wheels due to residual films wound to generate jumping teeth is prevented, the left conveying chain and the right conveying chain of the self-film-removing nail tooth chain belt 38 can be well protected, and the service life of the self-film-removing nail tooth chain belt is further prolonged. During actual use, the impurity guide plate can be arranged below the horizontal section of the nail belt, and fallen soil and stones can slide to the ground on the left side and the right side of the equipment along the impurity guide plate. The film collecting gearbox 11 drives the nail belt driving chain wheel 40 to drive the self-film-removing nail tooth chain belt 38 to work, so that the self-film-removing nail tooth chain belt 38 has stronger power, and the continuous operation capacity of the self-film-removing nail tooth chain belt is improved.

As shown in fig. 2 and 3, the film cleaning device is a scraper film removing device, the scraper film removing device comprises a lower chain belt shaft 52, a front chain belt shaft 53, a rear chain belt shaft 54 and a film scraping chain belt, the lower chain belt shaft 52 is installed on the film collecting rack 8 below the nail belt rear shaft 36, the left and right sides of the lower chain belt shaft 52 are respectively fixed with a chain belt lower pulley 55, the front chain belt shaft 53 is close to the upper part of the rear end of the self-film removing nail tooth chain belt 38, the left and right sides of the front chain belt shaft 53 are respectively fixed with a chain belt front chain wheel 56, the rear chain belt shaft 54 is positioned behind the front chain belt shaft 53, the left and right sides of the rear chain belt shaft 54 are respectively fixed with a chain belt rear pulley 57, the film scraping chain belt comprises a left and right film scraping chain, a scraper bar 58 and a film scraper bar 59, the left and right film scraping chain scraper are arranged in parallel and are evenly spaced with each other, the left and right side scraper bar 58 are respectively fixed on the ear plates of the chain links of the left and right film, the scraping membrane 59 is fixedly arranged on the scraping blade seat rod 58 through screws, and a scraping rod plate impurity discharging hole 61 is formed in the scraping rod seat plate 60 corresponding to the chain hole position between two rollers of each chain link. Pulleys are arranged on the lower chain belt shaft 52 and the rear chain belt shaft 54 to replace chain wheels, so that the situation that residual films are wound on the gear teeth of the original chain wheels at the positions of the lower chain belt shaft 52 and the rear chain belt shaft 54 to the maximum extent and the residual films are blocked in the chain holes of the left and right film scraping chains of the film scraping chain belt is avoided, the phenomenon that the left and right film scraping chains jump at the positions of the original chain wheels or the film scraping chain belt is damaged due to uneven lateral tensile stress of the left and right film scraping chains caused by the action of the residual film blocking at one side chain wheel is avoided, and the service life of the film scraping chain belt is effectively prolonged; during actual manufacturing, the scraping rod plate impurity discharging holes 61 are preferably rectangular holes, the side length of each rectangular hole is preferably 1.2 times to 1.5 times of the corresponding chain hole, residual films hung on the corresponding chain wheel can be discharged through the scraping rod plate impurity discharging holes 61, gear teeth of the chain wheel are prevented from being blocked by the chain holes to generate jumping teeth due to the fact that the residual films are wound, the left and right film scraping chains of the film scraping chain belt can be well protected, and the service life of the film scraping chain belt is prolonged. In actual manufacturing, support blocking pieces can be respectively and fixedly installed on the left and right film scraping chains between two adjacent scraper seat rods 58, the support blocking pieces can enable two adjacent scraping film sheets 59 at the straight section of the film scraping chain belt to form a groove with a closed bottom, impurity removing holes are formed in the support blocking pieces corresponding to chain holes between two rollers of each chain link, and the left and right film scraping chains of the film scraping chain belt can be further protected through the support blocking pieces with the impurity removing holes; can effectively clear up through scraping diaphragm 59 and choose the incomplete membrane of hanging on membrane spike tooth 13 and attach, scrape diaphragm 59, hold in the palm the separation blade and adopt the canvas preparation best, not only have certain flexibility, toughness is good moreover, the wearability is high, it is not fragile, difficult adhesion incomplete membrane, the incomplete membrane that certain point position department hung and attached on the nail area collection device can be cleared up by a plurality of high-speed continuous times of scraping diaphragm 59, cleaning efficiency is higher, the cleaning performance is better, excellent in use effect.

As shown in fig. 1, 2 and 4, the straw smashing device comprises a smashing cover plate 15 and a smashing cutter shaft 16, the smashing cover plate 15 is fixed on a returning frame 1, the smashing cutter shaft 16 is arranged below the smashing cover plate 15 through a bearing seat, at least two powder stalk cutter seat ring groups are uniformly distributed on the outer side of the smashing cutter shaft 16, each powder stalk cutter seat ring group comprises at least three throwing cutter seats, each throwing cutter seat is hinged with a throwing cutter 3 through a pin shaft, a cutter shaft driving wheel 17 capable of being connected with the returning gearbox 2 is fixedly arranged at the left end of the smashing cutter shaft 16, the auger device comprises an auger cover, an auger rotating shaft 18 and auger blades, the auger cover is fixedly arranged on the returning frame 1 behind the smashing cutter shaft 16, the auger rotating shaft 18 with the auger blades is arranged in the auger cover, a feeding port is arranged at the front part of the auger cover, a fan 5 is arranged at the side end of the, the upper part of the fan 5 is provided with a discharge port and is connected with a scattering pipe 4, the outlet of the scattering pipe 4 is positioned at the rear side of the returning frame 1, the left end of a screw rotating shaft 18 is fixedly provided with a screw driving wheel 19, the right part of a crushing screw shaft 16 is fixedly provided with a screw shaft driving wheel 20, the screw shaft driving wheel 20 is connected with the screw driving wheel 19 through a driving belt, and a returning depth limiting roller 21 is arranged below the rear part of the returning frame 1. During operation, the output shaft of the returning gearbox 2 drives the smashing cutter shaft 16 to rotate through the cutter shaft driving wheel 17, the cutter shaft driving wheel 20 drives the auger driving wheel 19 and the auger rotating shaft 18 to rotate through the driving belt, the auger rotating shaft 18 drives the impeller of the fan 5, the auger blades rotate to push the straws to the fan 5, and the fan 5 runs at a high speed to uniformly scatter the smashed straws back to the farmland through the scattering pipe 4.

As shown in fig. 1-2, the film-raising hob device includes a front shifting shaft 22, a hob shaft 23, a hob seat and a hob blade, a left side plate 24 and a right side plate are respectively fixed at the left end and the right end below the front portion of the film-collecting frame 8, the left side and the right side of the front shifting shaft 22 are respectively installed on the left side plate 24 and the right side plate through bearings, at least three shifting plates are uniformly distributed and fixed on the outer circumference of the front shifting shaft 22, a shifting shaft driving wheel 25 is fixedly installed at the left end of the front shifting shaft 22, the output shaft of the film-collecting gearbox 11 includes a left film-collecting output shaft 26 and a right film-collecting output shaft 27, the shifting shaft driving wheel 25 is connected with the left film-collecting output shaft 26 through a transmission belt, the hob shaft 23 is installed below the rear portion of the front shifting shaft 22, the left side and the right side of the hob shaft 23 are respectively, The film collecting right output shaft 27 is connected with the driving gear through a connecting shaft 28, the driven gear is fixedly installed at the right end of the hob shaft 23, hob seats are uniformly distributed and fixed on the outer side of the hob shaft 23 corresponding to the position between two rows of cotton plants, and hob blades are fixedly installed on the hob seats through screws. When the film removing hob cutter device is used, the hob cutter blade is located between two lines of cotton plants at the corresponding position, avoidance of cotton root positions is achieved, when the film removing hob cutter device is used for removing residual films from a cotton field, the cotton roots can be prevented from being removed at the same time, therefore, the cotton residual roots mixed in the residual films can be reduced, equipment is prevented from being clamped, and the cotton roots can be turned into the soil to serve as green manure during subsequent plowing. The front shifting shaft 22 is higher than the hob shaft 23, and aims to shift up the residual mulch conveyed by the hob blade and throw the residual mulch backward, and in the throwing process, part of soil and stones fall into a field below, so that the residual mulch is primarily cleaned.

As shown in fig. 1-2, a second-stage roller conveying device is arranged on the film collecting rack 8 between the film lifting hob device and the nail belt collecting device, the second-stage roller conveying device comprises a front conveying roller shaft 29 and a rear conveying roller shaft 30, the front conveying roller shaft 29 is installed on the film collecting rack 8 through a bearing seat, the rear conveying roller shaft 30 is arranged on the film collecting rack 8 behind the front conveying roller shaft 29, conveying shifting plates are uniformly distributed and fixed on the outer circumferences of the front conveying roller shaft 29 and the rear conveying roller shaft 30 respectively, a rear conveying roller driving wheel 31 is fixed at the right end of the rear conveying roller shaft 30, the rear conveying roller driving wheel 31 is connected with a transmission gear of a transmission gear set through a transmission chain, a rear conveying roller left transmission wheel 32 is fixed at the left end of the rear conveying roller shaft 30, a front conveying roller driving wheel 33 is fixed at the left end of the front conveying roller shaft 29, and the front conveying roller driving wheel. The residual films thrown out by the film-lifting hobbing-cutter device can be caught and relay-thrown twice through the conveying shifting plates on the front conveying roller shaft 29 and the rear conveying roller shaft 30, and are conveyed to the nail belt collecting device at the rear, most of soil and stones fall into a field below in the relay-throwing process, and further cleaning of the residual films is realized.

As shown in fig. 1-2, the film collecting rack 8 is provided with a self-discharging film collecting box at the rear part, the self-discharging film collecting box comprises a box body seat frame 62, the film discharging device comprises a collecting box 63 and a film discharging chain belt assembly, wherein the collecting box 63 is fixed at the upper end of a box body seat frame 62, a front film discharging shaft is installed at the front end of the box body seat frame 62, a rear film discharging shaft is installed at the rear end of the box body seat frame 62, a hydraulic motor 64 is fixed at the rear part of the left end of a box body seat frame 6 through a motor seat frame, a power shaft of the hydraulic motor 64 is connected with the left end of the rear film discharging shaft, the film discharging chain belt assembly comprises a discharging chain belt 65 and poking rods 66, the poking rods 66 in the left and right directions are uniformly fixed on the discharging chain belt 65 at intervals, the front part of the discharging chain belt 65 is installed on the front film discharging shaft, the rear part of the discharging chain belt 65 is installed on the rear film discharging shaft, the upper part of the film discharging chain belt penetrates through the. The scraper blade demoulding device carries the incomplete membrane in the collecting box 63, and after the collecting box 63 is full of the incomplete membrane, through opening hydraulic motor 64 at farmland ground, the incomplete membrane that gathers in the drive chain belt 65 upper end of unloading is moved backward, is promoted the back boxboard and opens and realize automatic discharge by dialling transfer rod 66, consequently can realize unloading the membrane fast, has reduced the cost of labor, is showing and has shortened the time of unloading, has improved the operating efficiency.

The foregoing description is by way of example only and is not intended as limiting the embodiments of the present application. All obvious variations and modifications of the present invention are within the scope of the present invention.

Claims

1. The utility model provides a straw returning machine detachable incomplete membrane recovery unit which characterized in that: comprises a film collecting machine body and a straw returning device which is positioned at the front end of the film collecting machine body and can be separated; the straw returning device comprises a returning frame, a returning gearbox and a straw crushing device with a flail knife, wherein the front end of the returning frame is provided with a traction frame which can be connected with a tractor, the upper end of the returning frame is provided with a returning connection frame, the front part of the returning frame is provided with the returning gearbox, and the front lower part of the returning frame is provided with the straw crushing device; receive the membrane machine body including receiving the membrane frame, play membrane hobbing cutter device, nail area collection device, clear membrane device, it is equipped with and receives the membrane link to receive membrane frame front portion, it is connected and can separate with returning the field link to receive the membrane link to be connected through adjusting the pull rod, the front portion of receiving the membrane frame is equipped with and receives the membrane gearbox, the input shaft of receiving the membrane gearbox is connected and can separate with the output shaft of returning the field gearbox through the universal shaft, the front portion of receiving the membrane frame, the rear portion is equipped with respectively receives membrane depth roller, the membrane frame below of receiving behind the membrane depth roller is equipped with and plays membrane hobbing cutter device to anterior receipts, it is equipped with the nail area collection device that the outside equipartition was chosen membrane nail tooth to receive the membrane frame middle part, nail area collection device rear portion is equipped with the clear membrane device that can clear up.

2. The separable residual film recycling device of a straw returning machine as claimed in claim 1, wherein: the left side and the right side of the lower part of the front end of the film collecting connecting frame are respectively provided with a connecting lug seat, the left side and the right side of the rear end of the returning connecting frame are respectively fixed with an auxiliary frame rod and hinged on the connecting lug seats, the left side and the right side of the rear end of the returning connecting frame and the left side and the right side of the front end of the film collecting connecting frame are respectively provided with a pull rod lug seat, the adjusting pull rod comprises a front connecting rod, a rear pull rod and a threaded connecting sleeve, the front end of the front connecting rod is hinged on the pull rod lug seat of the returning connecting frame through a connecting pin, the outer side of the rear part of the front connecting rod is provided with a right-handed external thread, the outer side of the front part of the rear pull rod is provided with a left-handed external thread, the rear end of the rear pull rod is hinged on the pull rod lug seat of the film collecting connecting frame through the connecting; the straw returning device also comprises an auger device and a fan with a throwing pipe, the auger device is arranged on the returning frame behind the straw crushing device, the fan is arranged at the side end of the auger device, the middle part of the film collecting frame is provided with a walking wheel carrier with a lifting hydraulic cylinder, and the lower end of the walking wheel carrier is provided with a walking wheel through a wheel shaft.

3. The separable residual film recycling device of a straw returning machine as claimed in claim 1 or 2, which is characterized in that: the nail belt collecting device comprises a nail belt lower shaft, a nail belt front shaft, a nail belt rear shaft and a self-demoulding nail tooth chain belt provided with a demoulding plate, the nail belt lower shaft is arranged below a film collecting rack, nail belt lower chain wheels are respectively fixed on the left side and the right side of the nail belt lower shaft, a nail belt driving chain wheel which can be connected with a film collecting gearbox is fixedly arranged on the right part of the nail belt lower shaft, the nail belt front shaft is arranged on the film collecting rack above the nail belt lower shaft, nail belt pulleys are respectively arranged on the left side and the right side of the nail belt front shaft, the nail belt rear shaft is arranged on the film collecting rack behind the nail belt front shaft, the nail belt upper chain wheels are respectively arranged on the left side and the right side of the nail belt rear shaft, the self-demoulding nail tooth chain belt is arranged on the nail belt lower chain wheels, the nail belt pulleys and the nail belt upper chain wheels, the nail belt lower shaft and the nail belt front shaft are arranged in the vertical direction to form a nail belt vertical section, the self-demoulding nail tooth chain belt between the nail belt front shaft and the nail belt rear shaft is arranged in the, a left belt roller, a right belt roller and a conveying belt are arranged in front of the lower part of the vertical section of the nail belt, the conveying belt is arranged on the left belt roller and the right belt roller and can convey materials to the left or right of the film collecting rack, the self-film-removing nail tooth chain belt comprises a left conveying chain and a right conveying chain, connecting rod and spike tooth pole, left and right conveying chain parallel arrangement and even interval are equipped with the connecting rod along left and right direction, both sides are fixed on the otic placode of the chain link of left and right conveying chain through the connecting rod bedplate respectively about the connecting rod, the deciduate board is fixed on the connecting rod, the chain hole position that corresponds between two rollers of each chain link on the connecting rod bedplate is equipped with connecting rod board row miscellaneous hole, be close to each connecting rod and be equipped with the spike tooth pole rather than parallel respectively, both sides are fixed on the otic placode of the chain link of left and right conveying chain through the ratch bedplate respectively about the spike tooth pole, choose the membrane spike tooth to fix on the spike tooth pole, the chain hole position that corresponds between two rollers of each chain link on the ratch bedplate is equipped with the ratch tooth board row miscellaneous hole.

4. The separable residual film recycling device of a straw returning machine as claimed in claim 3, wherein: the film cleaning device is a scraper film removing device, the scraper film removing device comprises a lower chain belt shaft, a front chain belt shaft, a rear chain belt shaft and a film scraping chain belt, the lower chain belt shaft is arranged on a film collecting rack below a nail belt rear shaft, the left side and the right side of the lower chain belt shaft are respectively fixed with a chain belt lower pulley, the front chain belt shaft is close to the upper part of the rear end of the self-film removing nail tooth chain belt, the left side and the right side of the front chain belt shaft are respectively fixed with a chain belt front chain wheel, the rear chain belt shaft is positioned behind the front chain belt shaft, the left side and the right side of the rear chain belt shaft are respectively fixed with a chain belt rear pulley, the film scraping chain belt comprises a left film scraping chain and, the scraping film seat comprises a scraping blade seat rod and a scraping film sheet, wherein the left and right scraping film chains are arranged in parallel and are uniformly arranged at intervals along the left and right direction, the left and right sides of the scraping blade seat rod are respectively fixed on ear plates of chain links of the left and right scraping film chains through scraping rod seat plates, the scraping film sheet is fixedly installed on the scraping blade seat rod through screws, and scraping rod plate impurity-removing holes are formed in positions, corresponding to chain holes between two rollers of each chain link, on the scraping rod seat plate.

5. The separable residual film recycling device of a straw returning machine as claimed in claim 1, 2 or 4, wherein: the straw crushing device comprises a crushing cover plate and a crushing cutter shaft, the crushing cover plate is fixed on a returning machine frame, the crushing cutter shaft is arranged below the crushing cover plate through a bearing seat, at least two powder stalk cutter seat ring groups are uniformly distributed outside the crushing cutter shaft, each powder stalk cutter seat ring group comprises at least three throwing cutter seats, each throwing cutter seat is hinged with a throwing cutter through a pin shaft, a cutter shaft driving wheel which can be connected with a returning gearbox is fixedly arranged at the left end of the crushing cutter shaft, the auger device comprises an auger housing, an auger rotating shaft and auger blades, the auger housing is fixedly arranged on the returning machine frame behind the crushing cutter shaft, the auger rotating shaft with the auger blades is arranged in the auger housing, a feeding port is arranged at the front part of the auger housing, a fan is arranged at the side end of the auger housing, the rotating shaft of the fan is connected with the auger, the outlet of the scattering pipe is positioned at the rear side of the returning frame, the left end of the auger rotating shaft is fixedly provided with an auger driving wheel, the right part of the crushing cutter shaft is fixedly provided with a cutter shaft driving wheel, the cutter shaft driving wheel is connected with the auger driving wheel through a driving belt, and the returning depth limiting roller is arranged below the rear part of the returning frame.

6. The separable residual film recycling device of a straw returning machine as claimed in claim 3, wherein: the straw crushing device comprises a crushing cover plate and a crushing cutter shaft, the crushing cover plate is fixed on a returning machine frame, the crushing cutter shaft is arranged below the crushing cover plate through a bearing seat, at least two powder stalk cutter seat ring groups are uniformly distributed outside the crushing cutter shaft, each powder stalk cutter seat ring group comprises at least three throwing cutter seats, each throwing cutter seat is hinged with a throwing cutter through a pin shaft, a cutter shaft driving wheel which can be connected with a returning gearbox is fixedly arranged at the left end of the crushing cutter shaft, the auger device comprises an auger housing, an auger rotating shaft and auger blades, the auger housing is fixedly arranged on the returning machine frame behind the crushing cutter shaft, the auger rotating shaft with the auger blades is arranged in the auger housing, a feeding port is arranged at the front part of the auger housing, a fan is arranged at the side end of the auger housing, the rotating shaft of the fan is connected with the auger, the outlet of the scattering pipe is positioned at the rear side of the returning frame, the left end of the auger rotating shaft is fixedly provided with an auger driving wheel, the right part of the crushing cutter shaft is fixedly provided with a cutter shaft driving wheel, the cutter shaft driving wheel is connected with the auger driving wheel through a driving belt, and the returning depth limiting roller is arranged below the rear part of the returning frame.

7. The separable residual film recycling device of a straw returning machine as claimed in claim 1, 2, 4 or 6, wherein: the film-lifting hobbing cutter device comprises a front shifting shaft, a hobbing cutter holder and a hobbing cutter blade, a left side plate and a right side plate are respectively fixed at the left end and the right end below the front part of a film-collecting rack, the left side and the right side of the front shifting shaft are respectively installed on the left side plate and the right side plate through bearings, at least three shifting plates are uniformly distributed and fixed on the periphery of the outer side of the front shifting shaft, a shifting shaft driving wheel is fixedly installed at the left end of the front shifting shaft, an output shaft of a film-collecting gearbox comprises a left film-collecting output shaft and a right film-collecting output shaft, the shifting shaft driving wheel is connected with the left film-collecting output shaft through a transmission belt, the hobbing cutter shaft is arranged below the rear part of the front shifting shaft, the left side and the right side of the hobbing cutter shaft are respectively installed on the left side, the film collecting right output shaft is connected with the driving gear through a connecting shaft, the driven gear is fixedly installed at the right end of the hob shaft, hob seats are uniformly fixed on the outer side of the hob shaft corresponding to the position between two lines of cotton plants, and hob blades are fixedly installed on the hob seats through screws.

8. The separable residual film recycling device of a straw returning machine as claimed in claim 3, wherein: the film-lifting hobbing cutter device comprises a front shifting shaft, a hobbing cutter holder and a hobbing cutter blade, a left side plate and a right side plate are respectively fixed at the left end and the right end below the front part of a film-collecting rack, the left side and the right side of the front shifting shaft are respectively installed on the left side plate and the right side plate through bearings, at least three shifting plates are uniformly distributed and fixed on the periphery of the outer side of the front shifting shaft, a shifting shaft driving wheel is fixedly installed at the left end of the front shifting shaft, an output shaft of a film-collecting gearbox comprises a left film-collecting output shaft and a right film-collecting output shaft, the shifting shaft driving wheel is connected with the left film-collecting output shaft through a transmission belt, the hobbing cutter shaft is arranged below the rear part of the front shifting shaft, the left side and the right side of the hobbing cutter shaft are respectively installed on the left side, the film collecting right output shaft is connected with the driving gear through a connecting shaft, the driven gear is fixedly installed at the right end of the hob shaft, hob seats are uniformly fixed on the outer side of the hob shaft corresponding to the position between two lines of cotton plants, and hob blades are fixedly installed on the hob seats through screws.

9. The separable residual film recycling device of a straw returning machine as claimed in claim 5, wherein: the film-lifting hobbing cutter device comprises a front shifting shaft, a hobbing cutter holder and a hobbing cutter blade, a left side plate and a right side plate are respectively fixed at the left end and the right end below the front part of a film-collecting rack, the left side and the right side of the front shifting shaft are respectively installed on the left side plate and the right side plate through bearings, at least three shifting plates are uniformly distributed and fixed on the periphery of the outer side of the front shifting shaft, a shifting shaft driving wheel is fixedly installed at the left end of the front shifting shaft, an output shaft of a film-collecting gearbox comprises a left film-collecting output shaft and a right film-collecting output shaft, the shifting shaft driving wheel is connected with the left film-collecting output shaft through a transmission belt, the hobbing cutter shaft is arranged below the rear part of the front shifting shaft, the left side and the right side of the hobbing cutter shaft are respectively installed on the left side, the film collecting right output shaft is connected with the driving gear through a connecting shaft, the driven gear is fixedly installed at the right end of the hob shaft, hob seats are uniformly fixed on the outer side of the hob shaft corresponding to the position between two lines of cotton plants, and hob blades are fixedly installed on the hob seats through screws.

10. The separable residual film recycling device of a straw returning machine as claimed in claim 7, 8 or 9, wherein: a second-stage roller conveying device is arranged on a film collecting rack between the film lifting hob device and the nail belt collecting device and comprises a front conveying roller shaft and a rear conveying roller shaft, wherein the front conveying roller shaft is installed on the film collecting rack through a bearing seat, the rear conveying roller shaft is arranged on the film collecting rack behind the front conveying roller shaft, conveying shifting plates are uniformly distributed and fixed on the outer circumference of the rear conveying roller shaft respectively, a rear conveying roller driving wheel is fixed at the right end of the rear conveying roller shaft and is connected with a transmission gear of a transmission gear set through a transmission chain, a rear conveying roller left driving wheel is fixed at the left end of the rear conveying roller shaft, a front conveying roller driving wheel is fixed at the left end of the front conveying roller shaft, and the front conveying roller driving wheel is connected with a rear conveying roller right driving wheel through the transmission chain; or/and the rear part of the film collecting rack is provided with a self-discharging film collecting box, the self-discharging film collecting box comprises a box body seat frame, a collecting box and a film discharging chain belt assembly, the collecting box is fixed at the upper end of the box body seat frame, the front end of the box body seat frame is provided with a front film discharging shaft, the rear end of the box body seat frame is provided with a rear film discharging shaft, the rear part of the left end of the box body seat frame is fixedly provided with a hydraulic motor through a motor seat frame, a power shaft of the hydraulic motor is connected with the left end of the rear film discharging shaft, the film discharging chain belt assembly comprises a discharging chain belt and poking and conveying rods, the poking and conveying rods in the left and right directions are uniformly fixed on the discharging chain belt at intervals, the front part of the discharging chain belt is arranged on the front film discharging shaft, the rear part of the discharging chain belt is arranged on the rear.