CN213695064U - Suspension type straw crushing and returning residual film recycling machine - Google Patents

Abstract

The utility model relates to an agricultural equipment technical field is a still field plastic film residue collector is smashed to suspension type straw, smash still field device including tractor, plastic film residue recovery unit and straw, still include grudging post and lift cylinder, be located the equal fixedly connected with grudging post in the frame left and right sides of the tractor of driver's cabin front side, grudging post upper portion with can pull up the straw and the still field device rear end of smashing is articulated to the kibbling straw is connected. The utility model has the advantages of reasonable and compact structure, smash still field device through setting up tractor and straw, can pull up the straw and smash, can improve the fertility of soil after the straw after smashing turns into soil, through setting up incomplete membrane recovery unit, can be clean and the batching cylinder with incomplete membrane and impurity separation, the transportation and the utilization in the later stage of being convenient for, through setting up grudging post and lift cylinder, still field device is smashed to the installation straw of being convenient for, in the transportation, the tractor is smashed still field device and incomplete membrane recovery unit with the straw respectively and is raised, it is more steady when making the tractor travel.

Description

Suspension type straw crushing and returning residual film recycling machine

Technical Field

The utility model relates to the technical field of agricultural equipment, in particular to a suspension type straw smashing and returning residual film recycling machine.

Background

The existing film-covered cultivation technology is widely used in various places, particularly in arid areas, and the film-covered cultivation technology really brings material benefits to farmers due to the obvious characteristics of increasing temperature, preserving soil moisture, inhibiting weed growth, promoting crop prematurity, increasing yield and the like, but the cultivated residual plastic film can cause soil hardening and degeneration if not timely and effectively recovered, so that the germination of crops is prevented, the land quality is rapidly reduced, the use efficiency is reduced, serious white pollution is brought to the environment, and the film-covered cultivation technology becomes a great public nuisance for environmental protection. And the structure of incomplete membrane sorting mechanism of incomplete membrane recovery unit of current is comparatively complicated to the manufacturing cost of equipment is higher, along with the application of straw returning to the field technique, straw returning to the field device also begins to use, but current straw returning to the field device straw smashes inefficiency, can not be connected the use with incomplete membrane recovery unit simultaneously with the tractor moreover, improved the cost that incomplete membrane was retrieved and the straw was returned to the field, be not convenient for the popularization of incomplete membrane recovery technique and straw returning to the field technique.

Disclosure of Invention

The utility model provides a still field plastic film residue collector is smashed to suspension type straw has overcome above-mentioned prior art not enough, and it can effectively solve the problem that manufacturing cost is high, inefficiency, can not the simultaneous operation that present straw smashes still field device and plastic film residue recovery unit and exists.

The technical scheme of the utility model is realized through following measure: the utility model provides a still field plastic film residue collector is smashed to suspension type straw, including the tractor, still field device is smashed to incomplete membrane recovery unit and straw, still include grudging post and lift cylinder, the equal fixedly connected with grudging post in the frame left and right sides of the tractor that is located the driver's cabin front side, grudging post upper portion with can pull up the straw and the crushing still field device rear end is articulated to be connected, the frame front portion left and right sides of tractor all is articulated with lift cylinder's cylinder body to be connected, every lift cylinder's anterior inboard is equipped with the lifting piston pole that can stretch out to the upper place, every lifting piston pole front end is smashed still field device rear portion with the straw respectively and is articulated to be connected in position, incomplete membrane recovery unit front.

The following are further optimization or/and improvement of the technical scheme of the utility model:

the straw crushing and returning device comprises a front frame, a straw pulling and conveying device, a crushing barrel and a front auger conveyor, wherein the front frame comprises a right frame and a left frame which have the same structure and are bilaterally and symmetrically distributed, the right frame comprises a right lower beam, a right upper beam, a movable vertical rod, an adjusting sleeve, a first compression spring and a front depth-adjusting wheel, the right lower beam comprises a horizontal section, an inclined section and a connecting section which are sequentially fixed together from front to back, the inclined section is inclined in a front-low and rear-high manner, the front side of the lower end of the inclined section is fixedly connected with the rear side of the horizontal section which is horizontally arranged from front to back, the rear side of the upper end of the inclined section is fixedly connected with the front side of the connecting section which is horizontally arranged from front to back, the rear part of the connecting section is hinged with the upper part of a vertical frame which is positioned at the right, the rear side of the middle part of the inclined section is hinged with the front end of a, the adjusting sleeve and the movable upright rod are arranged in an up-down direction, the front side of an upper right beam and the front side of a horizontal section are respectively fixedly connected with the corresponding positions of the rear side of the upper part of the adjusting sleeve, the middle part of the movable upright rod is hinged with the middle part of the horizontal section, a first compression spring is fixedly connected between the front side of the upper part of the movable upright rod and the rear side of the adjusting sleeve, the rear part of the horizontal section corresponding to the rear part of the movable upright rod is provided with a front deepening wheel, the rear part of the upper right beam is fixedly provided with a crushing barrel which is cylindrical in a left-right direction, the front part of the crushing barrel is provided with a feed inlet, the upper right beam at the front side of the feed inlet is provided with a seedling pulling conveying device capable of pulling up and conveying straws into the feed inlet, a crushing shaft is rotatably arranged in the crushing barrel, stirring rollers are fixedly arranged outside the stirring shaft, a plurality of cutting knives capable of crushing straws are uniformly distributed at intervals along the circumference on, the right end of the front auger conveyor is provided with a discharge port, the left end of the crushing shaft is in transmission connection with an engine output shaft of a tractor through a belt wheel, and the left end of the crushing shaft is in transmission connection with the left end of a driving shaft of the front auger conveyor through the belt wheel.

The grain pulling and conveying device can comprise a right chain, a left chain, lower grain pulling teeth, a grain pulling wheel, upper grain pulling teeth and a tool rest, the tool rest capable of moving up and down is arranged in the adjusting sleeve, the tool rest is a U-shaped frame with an upward opening, the left part of the tool rest is arranged together with the front side of the left frame at a corresponding position, a plurality of soil loosening knives are uniformly distributed at intervals on the left and right of the lower side of the tool rest, a left and right driven shaft is rotatably arranged on the lower part of a movable vertical rod corresponding to the lower side of the horizontal section, a right driven sprocket and a left driven sprocket are respectively and fixedly arranged on the right part and the left part of the driven shaft corresponding to the position between the right frame and the left frame, a left and right grain pulling shaft and a left and right driving shaft are respectively and rotatably arranged on the upper side of the front part and the rear part of a right upper beam corresponding to the front position and the rear position of the movable, the right driving sprocket is in transmission connection with the right driven sprocket through a right chain, the left driving sprocket is in transmission connection with the left driven sprocket through a left chain, a plurality of left-right lower seedling pulling teeth are evenly distributed on the outer side of the left chain along the circumferential direction, the right part of each lower seedling pulling tooth is fixedly connected with the corresponding position on the outer side of the right chain, the cross section of each lower seedling pulling tooth is triangular, a seedling pulling wheel is fixedly mounted on the outer side of the middle part of a seedling pulling shaft, a plurality of seedling pulling tooth groups are evenly distributed on the outer side of the seedling pulling wheel along the circumferential direction at intervals, each seedling pulling tooth group comprises at least two upper seedling pulling teeth which are continuously arranged along the circumferential direction, the cross section of each upper seedling pulling tooth is triangular, at least four upper seedling pulling teeth positioned on the outer side of the rear part of the seedling pulling wheel are meshed with the lower seedling pulling teeth and can pull up straws on the ground and convey the straws from the front upper part to the rear part, and the left.

The straw pulling and conveying device can further comprise a middle rotating groove, an upper fixed cutter is fixed on the front side of the crushing barrel corresponding to the upper end position of the feeding hole, a middle rotating shaft with a downward opening is fixed on the upper side of the front portion of the upper fixed cutter, a left-right middle rotating shaft is arranged in the middle rotating groove, front shaft seats are installed at the left end and the right end of the middle rotating shaft, a second compression spring with a vertical setting is fixedly connected between the upper end of each front shaft seat and the corresponding position of the middle rotating groove, a plurality of anticlockwise rotating shaft is uniformly distributed on the outer side of the middle rotating shaft along the circumference, straws at the front side of the right driving sprocket can be conveyed to a middle rotating impeller in the feeding hole, the left end of the middle rotating shaft is connected with the left portion of the crushing shaft through belt wheel transmission, the rotating direction of the middle rotating shaft is opposite, a lower fixed cutter is fixed on the front side of the crushing barrel.

The residual film recovery device can comprise a rear frame, a suspension bracket, an excavating device, a fan, a mesh belt type spike-tooth chain plate, a collecting device and a power assembly, wherein the suspension bracket is fixedly arranged on the front side of the middle part of the rear frame, the excavating device is arranged below the front part of the rear frame, the lower part of the rear frame behind the excavating device is provided with the soil breaking device, the soil breaking device comprises at least one soil breaking roller, a plurality of soil breaking cutters are uniformly distributed around the outer side of the soil breaking roller, the mesh belt type spike-tooth chain plate is positioned behind the soil breaking device and can collect residual films, an air outlet of the fan is positioned in front of the mesh belt type spike-tooth chain plate and can separate stubbles and residual films, the collecting device is positioned at the rear part of the frame and can collect and remove the residual films, the front part of the rear frame is provided with the power assembly which can be connected with a power output shaft of a tractor, and the excavating, the rotating shaft of the soil crushing roller is in transmission connection with the rotating shaft of the digging device through a belt wheel.

The mesh belt type nail tooth chain plate can be arranged on a rear frame through a lower chain wheel, a front upper chain wheel, a rear upper chain wheel and an upper tensioning chain wheel, a lower rotating shaft is rotatably arranged on the rear frame behind the soil crushing device, a front upper rotating shaft is rotatably arranged on the rear frame above the lower rotating shaft, a rear upper rotating shaft is rotatably arranged on the rear frame behind the front upper rotating shaft, the position of the rear upper rotating shaft is equal to the position of the front upper rotating shaft, an upper tensioning shaft is rotatably arranged on the rear frame below the rear upper rotating shaft, the lower chain wheel, the front upper chain wheel, the rear upper chain wheel and the upper tensioning chain wheel are respectively and fixedly arranged on the lower rotating shaft, the front upper rotating shaft, the rear upper rotating shaft and the upper tensioning shaft, the mesh belt type nail tooth chain plate is sleeved outside the lower chain wheel, the front upper chain wheel and the rear upper chain wheel, the middle part of the rear lower section of the mesh belt type nail tooth chain plate is tightly pressed on the front upper, the first driving wheel is connected with the power assembly and can drive the front upper chain wheel to rotate.

The collecting device can comprise a residual film collecting box and a residual film conveyor belt, the residual film collecting box is arranged on a rear rack on the rear side of an upper tensioning shaft, the residual film collecting box comprises a right side plate, a left side plate and a rear side plate, the right side plate and the left side plate are respectively fixedly connected with the right side of the rear part of the rear rack and the left side of the rear part, the lower end of the rear side plate is hinged to the lower side of the rear end of the rear rack through a residual film box hinge shaft, film unloading oil cylinders are respectively arranged between the front side of the right part and the front side of the left part of the rear side plate and the corresponding position of the rear side of the rear rack, the residual film conveyor belt capable of rolling the residual films together is arranged on the left side of the lower part of the right side plate, the residual film conveyor belt is provided with a first belt roller, a second belt roller, a third belt roller and a lower tensioning belt roller on the rear rack, a first rotating shaft is rotatably, the rear frame of below before the third pivot rotates and installs lower tensioning shaft, the position of lower tensioning shaft and first pivot position are equal in height or are less than first pivot position, first area roller, the second area roller, third area roller and lower tensioning area roller are fixed mounting respectively in first pivot, the second pivot, the third pivot is epaxial with lower tensioning, incomplete membrane conveyer belt suit is at first area roller, second area roller and third area roller outside, the back upper segment middle part of incomplete membrane conveyer belt compresses tightly the rear lower part at lower tensioning area roller, first pivot links together through band pulley transmission with lower pivot, the rear depth wheel is installed to the rear frame lower part that corresponds first area roller rear side position.

A recovery cover can be arranged above the mesh belt type nail tooth chain plate corresponding to the position between the front upper rotating shaft and the rear upper rotating shaft, the recovery cover is a shell with a downward opening, the lower side of the rear end of the recovery cover is close to the upper side of the rear side plate, the lower side of the right part and the lower side of the left part of the recovery cover are respectively fixedly connected with the upper side of the right side plate and the upper side of the left side plate, the lower side of the front part of the recovery cover is fixedly provided with a front baffle, the right rear side and the left rear side of the front baffle are respectively fixedly connected with the front side of the right side plate and the front side of the left side plate, the middle part of the front side of the recovery cover corresponding to the front position of the front upper chain wheel is provided with an air inlet, the inner side of the recovery cover corresponding to the upper side of the air inlet is fixedly communicated with a first air pipe with the air outlet of the fan, the middle part of the, the rear frame front portion that corresponds preceding baffle front lower place position installs the back auger conveyor of carrying from left to right, the fixed intercommunication of feed inlet of back auger conveyor upper end has the row's of being low high form slope in front and back and cross-section for the rectangle miscellaneous pipe, arrange miscellaneous pipe rear end upper side and preceding baffle downside fixed connection, arrange miscellaneous pipe rear end downside and extend backward and be close to with the mesh belt nail tooth link chain board that corresponds the position, back auger conveyor right-hand member is equipped with the discharge gate, the pivot left end of back auger conveyor passes through band pulley transmission with the pivot of fan and is connected.

The upper sides of the right part and the left part of the rear frame are fixedly connected with U-shaped adjusting frames with downward openings, the upper parts of the adjusting frames are provided with sliding grooves with downward openings, rear shaft seats capable of moving back and forth in the sliding grooves of the corresponding positions are mounted at the left end and the right end of the rear upper rotating shaft, and third compression springs are fixedly connected between the front sides of the rear shaft seats and the front sides of the adjusting frames of the corresponding positions.

The utility model has the advantages of reasonable and compact structure, the operation is convenient, smash still field device through setting up tractor and straw, can pull up the straw and smash, can improve the fertility of soil after the straw after smashing turns into soil, through setting up incomplete membrane recovery unit, can be clean and the batching cylinder with incomplete membrane and impurity separation, the transportation and the utilization in the later stage of being convenient for, through setting up grudging post and lift cylinder, still field device is smashed to the installation straw of being convenient for, in the transportation, the tractor is smashed still field device and incomplete membrane recovery unit with the straw respectively and is raised, it is more steady when making the tractor travel.

Drawings

Fig. 1 is a schematic structural view of the preferred embodiment of the present invention.

The codes in the figures are respectively: 1 is a tractor, 2 is a vertical frame, 3 is a lifting oil cylinder, 4 is a horizontal section, 5 is an inclined section, 6 is a connecting section, 7 is an upper right beam, 8 is a crushing cylinder, 9 is a crushing shaft, 10 is a stirring roller, 11 is a cutting knife, 12 is a front auger conveyor, 13 is an adjusting sleeve, 14 is a movable vertical rod, 15 is a first compression spring, 16 is a front depth adjusting wheel, 17 is a knife rest, 18 is a loosening knife, 19 is a driven shaft, 20 is a right driven sprocket, 21 is a driving shaft, 22 is a right driving sprocket, 23 is a right chain, 24 is a seedling pulling shaft, 25 is an upper seedling pulling tooth, 26 is a lower seedling pulling tooth, 27 is a transfer groove, 28 is an upper fixed knife, 29 is a middle rotating shaft, 30 is a front shaft seat, 31 is a second compression spring, 32 is a transfer impeller, 33 is a lower fixed knife, 34 is a rear frame, 35 is a suspension frame, 36 is an excavating device, 37 is a fan, 38 is a soil crushing roller, 39 is a soil crushing roller, and 40 is a power assembly, 41 is a rear depth-adjusting wheel, 42 is a mesh belt type spike tooth chain plate, 43 is a lower chain wheel, 44 is a front upper chain wheel, 45 is a rear upper chain wheel, 46 is an upper tensioning chain wheel, 47 is a lower rotating shaft, 48 is a front upper rotating shaft, 49 is a rear upper rotating shaft, 50 is an upper tensioning shaft, 51 is a straw pulling wheel, 52 is a rear side plate, 53 is a film unloading oil cylinder, 54 is a residual film conveying belt, 55 is a first belt roller, 56 is a first rotating shaft, 57 is a second belt roller, 58 is a second rotating shaft, 59 is a third belt roller, 60 is a third rotating shaft, 61 is a lower tensioning belt roller, 62 is a lower tensioning shaft, 63 is a front baffle, 64 is a third compression spring, 65 is a guide plate, 66 is a first shaft seat, 67 is a second air pipe, 68 is a recovery cover, 69 is a rear auger conveyor, 70 is an impurity removing pipe, 71 is an adjusting frame, and 72 is a rear adjusting frame.

Detailed Description

The utility model discloses do not receive the restriction of following embodiment, can be according to the utility model discloses a technical scheme and actual conditions determine concrete implementation.

In the utility model discloses in, for the convenience of description, with the utility model discloses the direction that the during operation gos forward is the place ahead, and the description of the relative position relation of each part all faces according to the observer the utility model discloses the direction that gos forward describes as the reference, if: the positional relationship of front, rear, up, down, front, rear, etc. is determined depending on the direction to the observer.

The invention will be further described with reference to the following examples and drawings:

as shown in the attached drawing 1, this still field plastic film residue collector is smashed to suspension type straw includes tractor 1, plastic film residue recovery unit and straw are smashed and are returned the field device, its characterized in that still includes grudging post 2 and lift cylinder 3, the equal fixedly connected with grudging post 2 in the frame left and right sides of tractor 1 that is located the driver's cabin front side, 2 upper portions of grudging post with can pull up the straw and the crushing straw is smashed still field device rear end is articulated to be connected, the anterior left and right sides of frame of tractor 1 all is articulated with lift cylinder 3's cylinder body to be connected, the anterior inboard of every lift cylinder 3 is equipped with the lifting piston rod that can stretch out to the upper front, every lifting piston rod front end is smashed still field device rear portion with the straw respectively and corresponds the position articulated connection, plastic film.

In the use, smash still field device through setting up tractor 1 and straw, can pull up the straw and smash, the straw after smashing is shed in the ground, the straw after smashing is turned into soil, can improve the organic matter in the soil, strengthen soil microbial activity, improve the fertility of soil, and then guarantee the high yield of later stage crop, through setting up incomplete membrane recovery unit, can be clean and the batching cylinder with incomplete membrane and impurity separation, be convenient for the transportation and the utilization in later stage, through setting up grudging post 2 and lift cylinder 3, still field tractor device is smashed to the installation straw of being convenient for, in the transportation, 1 smashes still field device and incomplete membrane recovery unit with the straw respectively and raises, it is more steady when making tractor 1 travel.

The suspension type straw crushing and returning residual film recycling machine can be further optimized or/and improved according to actual needs:

as shown in the attached figure 1, the straw crushing and returning device comprises a front frame, a straw pulling and conveying device, a crushing barrel 8 and a front auger conveyor 12, wherein the front frame comprises a right frame and a left frame which have the same structure and are symmetrically distributed left and right, the right frame comprises a right lower beam, a right upper beam 7, a movable upright stanchion 14, an adjusting sleeve 13, a first compression spring 15 and a front depth wheel 16, the right lower beam comprises a horizontal section 4, an inclined section 5 and a connecting section 6 which are sequentially fixed together from front to back, the inclined section 5 is inclined in a front-low and rear-high shape, the front side of the lower end of the inclined section 5 is fixedly connected with the rear side of the horizontal section 4 which is horizontally arranged from front to back, the rear side of the upper end of the inclined section 5 is fixedly connected with the front side of the connecting section 6 which is horizontally arranged from front to back, the rear part of the connecting section 6 is hinged with the upper part of a vertical frame 2 which is positioned at the right, the, a right upper beam 7 which is arranged in parallel with the horizontal section 4 is fixed at the rear side of the middle part of the inclined section 5, an adjusting sleeve 13 and a movable upright rod 14 are arranged in the vertical direction, the front side of the right upper beam 7 and the front side of the horizontal section 4 are respectively fixedly connected with the corresponding positions of the rear side of the upper part of the adjusting sleeve 13, the middle part of the movable upright rod 14 is hinged with the middle part of the horizontal section 4, a first compression spring 15 is fixedly connected between the front side of the upper part of the movable upright rod 14 and the rear side of the adjusting sleeve 13, a front depth adjusting wheel 16 is arranged at the rear part of the horizontal section 4 which corresponds to the rear part of the movable upright rod 14, a crushing barrel 8 is fixedly arranged at the rear part of the right upper beam 7, the crushing barrel 8 is cylindrical, the crushing barrel 8 is left and right, a feed inlet is arranged at the front part of the crushing barrel 8, a stalk pulling and conveying device which can pull up the stalks and feed the stalks into the feed, a plurality of cutting knives 11 capable of crushing straws are uniformly distributed on the outer side of the stirring and crushing roller 10 at intervals along the circumference, a discharge port is arranged on the lower part of the stirring and crushing barrel 8, the discharge port is fixedly communicated with the left and right sides of the feed end of a front auger conveyor 12, a discharge port is arranged on the right end of the front auger conveyor 12, the left end of a stirring and crushing shaft 9 is in transmission connection with an engine output shaft of a tractor 1 through a belt wheel, and the left part of the stirring and crushing shaft 9 is in transmission connection with the left end of a driving shaft of the front auger conveyor 12.

According to the demand, the left end of the stirring cylinder 8 is fixedly connected with the corresponding position of the left frame, the stirring shaft 9 is rotatably installed in the stirring cylinder 8 through a bearing seat, and the right part and the left part of the front auger conveyor 12 are respectively fixedly connected with the right frame and the left frame. In the use, through setting up cutting knife 11, can carry the straw that pulls out standing grain conveyor to in the garrulous section of thick bamboo 8 and smash, improve the straw speed of rotting thoroughly in soil, auger conveyor 12 before through setting up, can concentrate the transportation to the tractor right side with kibbling straw, avoid kibbling straw to shed the back and fly everywhere, reduce environmental pollution, through setting up preceding depth wheel 16, at the during operation, can adjust the height of preceding frame and ground.

As shown in the attached figure 1, the straw pulling and conveying device comprises a right chain 23, a left chain, a lower straw pulling tooth 26, a straw pulling wheel 51, an upper straw pulling tooth 25 and a cutter frame 17, the cutter frame 17 capable of moving up and down is installed in the adjusting sleeve 13, the cutter frame 17 is a U-shaped frame with an upward opening, the left part of the cutter frame 17 is installed together with the front side of the left frame at a corresponding position, a plurality of scarification cutters 18 are evenly distributed on the left side and the right side of the lower side of the cutter frame 17 at intervals, a left-right driven shaft 19 is rotatably installed on the lower part of a movable upright rod 14 corresponding to the lower side position of a horizontal section 4, a right driven sprocket 20 and a left driven sprocket are respectively and fixedly installed on the right part and the left part of the driven shaft 19 corresponding to the position between the right frame and the left frame, a left-right straw pulling shaft 24 and a left-right driving shaft 21 are respectively and rotatably installed on the upper sides of the front part and the front part of the upper beam 7 corresponding to the front The right driving sprocket 22 is in transmission connection with the right driven sprocket 20 through a right chain 23, the left driving sprocket is in transmission connection with the left driven sprocket through a left chain, a plurality of left-right lower seedling pulling teeth 26 are evenly distributed on the outer side of the left chain along the circumferential direction, the right part of each lower seedling pulling tooth 26 is fixedly connected with the corresponding position on the outer side of the right chain 23, the cross section of each lower seedling pulling tooth 26 is triangular, a seedling pulling wheel 51 is fixedly mounted on the outer side of the middle part of a seedling pulling shaft 24, a plurality of seedling pulling tooth groups are evenly distributed on the outer side of the seedling pulling wheel 51 along the circumferential direction at intervals, each seedling pulling tooth group comprises at least two upper seedling pulling teeth 25 which are continuously arranged along the circumferential direction, the cross section of each upper seedling pulling tooth 25 is triangular, at least four upper seedling pulling teeth 25 which are positioned on the outer side of the rear part of the seedling pulling wheel 51 are meshed with the lower seedling pulling teeth 26 and can pull up the straws on the ground and are conveyed from the front-lower direction and the rear-upper part, and.

According to the requirement, the right side of the upper part of the adjusting sleeve 13 is provided with a left-right through fixing hole, four left-right through adjusting holes are uniformly distributed on the upper part of the knife rest 17 at intervals, the knife rest 17 and the adjusting sleeve 13 are installed together with a fixing pin of one of the adjusting holes through the fixing hole at the left end, the scarifier blade 18 is the prior known technology, seven upper seedling pulling teeth 25 are simultaneously meshed with lower seedling pulling teeth 26 at corresponding positions, the seedling pulling shaft 24, the driving shaft 21 and the driven shaft 19 are all installed together with the front frame through paired bearing seats, the driving shaft 21 rotates clockwise, and the crushing shaft 9 rotates anticlockwise. During the use, the roots of the straws can be cut off by arranging the loosening blades 18 so as to be convenient to pull up the straws, the soil penetration depth of the loosening blades 18 can be adjusted by adjusting the position of the cutter holder 17 so as to enable the soil penetration depth of the loosening blades 18 to be between 7cm and 10cm, the straws can be pressed down and conveyed into the crushing barrel 8 from the ground through the upper seedling-pulling teeth 25 and the lower seedling-pulling teeth 26 by arranging the seedling-pulling wheels 51, the straws can be preliminarily rolled after being pulled up by at least four of the upper seedling-pulling teeth 25 positioned at the outer side of the rear part of the seedling-pulling wheels 51 and the lower seedling-pulling teeth 26 so as to reduce the strength of the straws, the straws can be conveniently crushed in the crushing barrel 8, the left and right driven shafts 19 are rotatably arranged at the lower parts of the movable upright posts 14, and when the straws are transported and rolled, the straws with different rod diameters can be conveyed to the crushing barrel 8 through the first compression springs 15 between the movable upright posts 14 and the adjusting sleeves 13, the application scope is enlarged and the utility model can be protected.

As shown in the attached figure 1, the straw pulling and conveying device further comprises a middle rotating groove 27, an upper fixed cutter 28 is fixed on the front side of the crushing cylinder 8 corresponding to the upper end position of the feeding hole, a U-shaped middle rotating groove 27 with a downward opening is fixed on the upper side of the front part of the upper fixed cutter 28, a left-right middle rotating shaft 29 is arranged in the middle rotating groove 27, front shaft seats 30 are respectively arranged at the left end and the right end of the middle rotating shaft 29, a second compression spring 31 which is vertically arranged is fixedly connected between the upper end of each front shaft seat 30 and the corresponding position of the inner side of the middle rotating groove 27, a plurality of middle rotating impellers 32 which can convey straws at the front side of the right driving sprocket 22 to the feeding hole when rotating anticlockwise are uniformly distributed on the outer side of the middle rotating shaft 29 along the circumference, the left end of the middle rotating shaft 29 is connected, a lower fixed knife 33 is fixed at the front side of the mincing barrel 8 corresponding to the lower end position of the feed inlet, and the front end of the lower fixed knife 33 is close to the lower stalk pulling teeth 26 corresponding to the position.

The neutral groove 27 is provided in the left-right direction as required. In the use, through runner 27 and mesogenic rotor 32 in setting up, can further cut off and get rid of the crushing section of thick bamboo 8 with the straw that lies in on the lower standing grain tooth 26 of top, improve the crushing efficiency of straw, through setting up second compression spring 31, make the straw homoenergetic in different pole footpaths cut off and carry to the crushing section of thick bamboo 8, avoid the straw to stir into the axis of rotation in the processing procedure and damage the utility model discloses, increased application scope and also can protect the utility model discloses, through setting up stationary knife 28 and lower stationary knife 33, can be with pull up whole transport of straw on the standing grain tooth 25 to the crushing section of thick bamboo 8 in, improve the crushing rate of straw.

As shown in figure 1, the residual film recovery device comprises a rear frame 34, a suspension bracket 35, an excavating device 36, a fan 37, a mesh belt type spike tooth chain plate 42, a collecting device and a power assembly 40, wherein the suspension bracket 35 is fixedly arranged on the front side of the middle part of the rear frame 34, the excavating device 36 is arranged below the front part of the rear frame 34, the lower part of the rear frame 34 behind the excavating device 36 is provided with a soil crushing device, the soil crushing device comprises at least one soil crushing roller 38, a plurality of soil crushing knives 39 are uniformly distributed around the outer side of the soil crushing roller 38, the mesh belt type spike tooth chain plate 42 is positioned behind the soil crushing device and can collect residual films, an air outlet of the fan 37 is positioned in front of the mesh belt type spike tooth chain plate 42 and can separate stubbles and residual films, the collecting device is positioned at the rear part of the frame and can collect and discharge the residual films, the front part of the rear frame 34 is provided with the power assembly 40, the digging device 36, the mesh belt type spike tooth chain plate 42 and the fan 37 are respectively connected with the power assembly 40, and the rotating shaft of the soil crushing roller 38 is in transmission connection with the rotating shaft of the digging device 36 through a belt wheel.

The suspension bracket 35 is a herringbone suspension bracket, the fan 37 is a conventional known technology, such as a cross-flow fan 37, the digging device 36 is a conventional known technology, the number of the soil crushing rollers 38 is two, and the number of the soil crushing blades 39 is six. In the use, through fan 37 direct separation root stubble, impurity and plastic film residue, the sorting efficiency of plastic film residue has been improved, the equipment structure has been simplified simultaneously, can collect the plastic film residue with the plastic film residue through collection device, regularly will collect the plastic film residue and unload, the transportation and the utilization of the plastic film residue in the later stage of being convenient for, through setting up hack device and digging device 36, can throw the soil block and the plastic film residue of burying the pressure plastic film residue to guipure formula spike tooth link joint 42 right-hand member downside, improve the plastic film residue rate of recovery, realize the separation of plastic film residue and earth, can carry out the breakage with the big soil block that hardens simultaneously, then transport the plastic film residue to collection device in through guipure formula spike tooth link joint 42.

As shown in fig. 1, the mesh belt type nail tooth chain plate 42 is mounted on the rear frame 34 through the lower chain wheel 43, the front upper chain wheel 44, the rear upper chain wheel 45 and the upper tension chain wheel 46, the rear frame 34 behind the soil breaking device is rotatably mounted with the lower rotating shaft 47, the rear frame 34 above the lower rotating shaft 47 is rotatably mounted with the front upper rotating shaft 48, the rear frame 34 behind the front upper rotating shaft 48 is rotatably mounted with the rear upper rotating shaft 49, the position of the rear upper rotating shaft 49 is equal to the position of the front upper rotating shaft 48, the rear frame 34 in front of and below the rear upper rotating shaft 49 is rotatably mounted with the upper tension shaft 50, the lower chain wheel 43, the front upper chain wheel 44, the rear upper chain wheel 45 and the upper tension chain wheel 46 are respectively and fixedly mounted on the lower rotating shaft 47, the front upper rotating shaft 48, the rear upper rotating shaft 49 and the upper tension shaft 50, the mesh belt type nail tooth chain plate 42 is sleeved outside the lower section of the lower chain wheel 43, the front upper chain wheel 44 and the rear, the front portion of the mesh belt type spike tooth chain plate 42 is arranged along the up-down direction, and a first driving wheel is fixed on the front upper rotating shaft 48, and the first driving wheel is connected with the power assembly 40 and can drive the front upper chain wheel 44 to rotate.

The lower rotating shaft 47, the front upper rotating shaft 48, the rear upper rotating shaft 49 and the upper tensioning shaft 50 are mounted on the rear frame 34 through paired bearing blocks as required, and the lower chain wheel 43, the front upper chain wheel 44, the rear upper chain wheel 45 and the upper tensioning chain wheel 46 are arranged in pairs. In the use, through setting up tensioning shaft 50, can increase collection device's space, reduce the volume of equipment, the anterior edge through guipure formula spike-tooth link joint 42 sets up from top to bottom, is convenient for separate the earth in the plastic film residue, makes the plastic film residue of retrieving cleaner.

As shown in the attached figure 1, the collecting device comprises a residual film collecting box and a residual film conveyor belt 54, the residual film collecting box is arranged on the rear frame 34 at the rear side of the upper tensioning shaft 50, the residual film collecting box comprises a right side plate, a left side plate and a rear side plate 52, the right side plate and the left side plate are respectively fixedly connected with the right side of the rear part and the left side of the rear part of the rear frame 34, the lower end of the rear side plate 52 is hinged to the lower side of the rear end of the rear frame 34 through a residual film box hinge shaft, film unloading oil cylinders 53 are respectively arranged between the front side of the right part and the front side of the left part of the rear side plate 52 and the corresponding position of the rear side of the rear frame 34, the left side of the lower part of the right side plate is provided with the residual film conveyor belt 54 capable of rolling residual films together, the residual film conveyor belt 54 is arranged on the rear frame 34 through a first belt roller 55, a second belt roller 57, a third belt roller 59 and a, a third rotating shaft 60 is rotatably mounted on the rear side plate 52 above the second rotating shaft 58, a lower tensioning shaft 62 is rotatably mounted on the rear frame 34 below and in front of the third rotating shaft 60, the position of the lower tensioning shaft 62 is equal to the position of the first rotating shaft 56 or lower than the position of the first rotating shaft 56, the first belt roller 55, the second belt roller 57, the third belt roller 59 and the lower tensioning belt roller 61 are fixedly mounted on the first rotating shaft 56, the second rotating shaft 58, the third rotating shaft 60 and the lower tensioning shaft 62 respectively, the residual film conveying belt 54 is sleeved outside the first belt roller 55, the second belt roller 57 and the third belt roller 59, the middle of the upper rear section of the residual film conveying belt 54 is pressed on the lower rear part of the lower tensioning belt roller 61, the first rotating shaft 56 and the lower rotating shaft 47 are connected together through belt wheel transmission, and a rear depth adjusting wheel 41 is mounted on the lower part of the rear frame 34 corresponding to the rear side position of the first.

During the use, the film unloading oil cylinder 53 is arranged to facilitate unloading of collected and processed residual films, the residual films conveyed by the mesh belt type spike-tooth chain plate 42 can be rolled into a cylindrical shape by the residual film conveying belt 54, the processed residual films can also be conveyed to the ground when the residual films are unloaded, and the rear frame 34 and the ground can be adjusted in height by the rear depth-adjusting wheel 41, so that the frame can be supported during working.

As shown in fig. 1, a recovery cover 68 is disposed above the mesh-belt type spike tooth chain plate 42 corresponding to the position between the front upper rotating shaft 48 and the rear upper rotating shaft 49, the recovery cover 68 is a downward-opening casing, the lower side of the rear end of the recovery cover 52 is close to the upper side of the rear side plate 52, the lower sides of the right part and the left part of the recovery cover 68 are fixedly connected with the upper side of the right side plate and the upper side of the left side plate respectively, a front baffle 63 is fixed on the lower side of the front part of the recovery cover 68, the rear side of the right part and the rear side of the left side plate of the front baffle 63 are fixedly connected with the front side of the right side plate and the front side of the left side plate respectively, an air inlet is disposed in the middle part of the front side of the recovery cover 68 corresponding to the front position of the front upper sprocket 44, a flow guide plate 65 inclined in a front-high and rear-low shape is fixed on the inner side of the recovery cover 68, the outlet end of the second air duct 67 is located in front of the rear upper chain wheel 45, the front part of the rear frame 34 corresponding to the front lower position of the front baffle 63 is provided with a rear auger conveyor 69 for conveying from left to right, a feed inlet at the upper end of the rear auger conveyor 69 is fixedly communicated with a trash removal pipe 70 which is inclined in a front-low rear-high shape and has a rectangular cross section, the upper side of the rear end of the trash removal pipe 70 is fixedly connected with the lower side of the front baffle 63, the lower side of the rear end of the trash removal pipe 70 extends backwards to be close to the mesh belt type nail tooth chain plate 42 corresponding to the position, the right end of the rear auger conveyor 69 is provided with a discharge outlet, and the left end of the rotating shaft of the rear auger conveyor.

In the use, retrieve cover 68 through setting up, can avoid the condition that the plastic film residue was scraped away when strong wind weather, the reliability is improved, through setting up guide plate 65 and row miscellaneous pipe 70, can make the wind direction rear lower place of air intake carry, be convenient for with the soil impurity separation in the plastic film residue on guipure formula spike tooth link joint 42 and collect to arranging miscellaneous pipe 70 in with soil impurity, carry to rear frame 34 right side with the impurity concentration that separates out at last, make the plastic film residue of retrieving cleaner, through setting up second tuber pipe 67, can make the plastic film residue of rear chain wheel 45 rear side drop more easily, plastic film residue recovery efficiency is high.

As shown in fig. 1, the upper sides of the right and left portions of the rear frame 34 are fixedly connected with downward-opening u-shaped adjusting frames 71, the upper portion of each adjusting frame 71 is provided with a downward-opening u-shaped sliding groove, the left and right ends of the rear upper rotating shaft 49 are respectively provided with a rear shaft seat 72 capable of moving back and forth in the corresponding sliding groove, and a third compression spring 64 is fixedly connected between the front side of each rear shaft seat 72 and the front side of the corresponding adjusting frame 71.

The adjusting frame 71 is disposed in the front-rear direction as required. In the use process, through setting up adjusting frame 71 and third compression spring 64, can make rear upper chain wheel 45 take place the vibration in the course of the work, make the incomplete membrane of rear upper chain wheel 45 rear side more drop.

Above technical feature constitutes the utility model discloses a best embodiment, it has stronger adaptability and best implementation effect, can increase and decrease unnecessary technical feature according to actual need, satisfies the demand of different situation.

Claims (9)

1. The utility model provides a still field plastic film residue collector is smashed to suspension type straw, including the tractor, still field device is smashed to plastic film residue collector and straw, its characterized in that still includes grudging post and lift cylinder, the equal fixedly connected with grudging post in the frame left and right sides of the tractor that is located the driver's cabin front side, grudging post upper portion with can pull up the straw and the crushing straw smashes still field device rear end and articulate and be connected, the frame front portion left and right sides of tractor all is connected with lift cylinder's cylinder body is articulated, every lift cylinder's anterior inboard is equipped with the lifting piston pole that can stretch out to the upper place ahead, every lifting piston pole front end smashes still field device rear portion with the straw respectively and corresponds the position and articulates and is connected.

2. The suspended straw crushing and returning residual film recycling machine according to claim 1, wherein the straw crushing and returning device comprises a front frame, a straw pulling and conveying device, a crushing barrel and a front auger conveyor, the front frame comprises a right frame and a left frame which are identical in structure and are symmetrically distributed in a left-right direction, the right frame comprises a right lower beam, a right upper beam, a movable vertical rod, an adjusting sleeve, a first compression spring and a front depth-adjusting wheel, the right lower beam comprises a horizontal section, an inclined section and a connecting section which are sequentially fixed together from front to back, the inclined section is inclined in a front-low and rear-high manner, the front side of the lower end of the inclined section is fixedly connected with the rear side of the horizontal section which is horizontally arranged in a front-back direction, the rear side of the upper end of the inclined section is fixedly connected with the front side of the connecting section which is horizontally arranged in the front-back direction, the rear part of the connecting section is hinged with the upper part of a vertical frame which is positioned on, a right upper beam arranged in parallel with the horizontal section is fixed on the rear side of the middle part of the inclined section, the adjusting sleeve and the movable upright rod are arranged in an up-down direction, the front side of the right upper beam and the front side of the horizontal section are respectively fixedly connected with the corresponding positions of the rear side of the upper part of the adjusting sleeve, the middle part of the movable upright rod is hinged with the middle part of the horizontal section, a first compression spring is fixedly connected between the front side of the upper part of the movable upright rod and the rear side of the adjusting sleeve, a front deepening wheel is installed on the rear part of the horizontal section corresponding to the rear part of the movable upright rod, a crushing barrel is fixedly installed on the rear part of the right upper beam, the crushing barrel is in a left-right cylindrical shape, a feeding port is arranged on the front part of the crushing barrel, a straw pulling and conveying device capable of pulling up and conveying straws into the feeding port is installed on the right upper beam on the front side of the feeding port, a crushing shaft, the lower part of the crushing cylinder is provided with a discharge port, the discharge port is fixedly communicated with the feed end of a left-right direction arranged front auger conveyor, the right end of the front auger conveyor is provided with a discharge port, the left end of the crushing shaft is in transmission connection with an engine output shaft of a tractor through a belt wheel, and the left part of the crushing shaft is in transmission connection with the left end of a driving shaft of the front auger conveyor through the belt wheel.

3. The suspended straw crushing and returning plastic film residue recovering machine as claimed in claim 1, wherein the straw pulling and conveying device comprises a right chain, a left chain, a lower straw pulling tooth, a straw pulling wheel, an upper straw pulling tooth and a cutter frame, the cutter frame capable of moving up and down is installed in the adjusting sleeve, the cutter frame is a U-shaped frame with an upward opening, the left part of the cutter frame is installed together with the front side of the left frame at a position corresponding to the left side, a plurality of scarification cutters are evenly distributed on the left side and the right side of the lower side of the cutter frame at intervals, a left-right driven shaft is rotatably installed on the lower part of the movable vertical rod corresponding to the lower side of the horizontal section, a right driven shaft and a left driven shaft are respectively and fixedly installed on the right part and the left part of the driven shaft corresponding to the positions between the right frame and the left frame, a left driving shaft and a right driving shaft and a left driving shaft are respectively and fixedly installed on the right part and the left part of the upper side of the front The left driving sprocket is in transmission connection with the left driven sprocket through a left chain, a plurality of left-right lower seedling pulling teeth are evenly distributed on the outer side of the left chain along the circumferential direction, the right part of each lower seedling pulling tooth is fixedly connected with the corresponding position of the outer side of the right chain, the cross section of each lower seedling pulling tooth is triangular, a seedling pulling wheel is fixedly mounted on the outer side of the middle of the seedling pulling shaft, a plurality of seedling pulling tooth groups are evenly distributed on the outer side of the seedling pulling wheel along the circumference at intervals, each seedling pulling tooth group comprises at least two upper seedling pulling teeth which are continuously arranged along the circumference, the cross section of each upper seedling pulling tooth is triangular, at least four upper seedling pulling teeth positioned on the outer side of the rear part of the seedling pulling wheel are meshed with the lower seedling pulling teeth and can pull up the straws on the ground and convey the straws from the front to the lower part and the rear upper part, and the left end of the driving shaft is in transmission connection with the left part of the crushing shaft through a belt.

4. The suspended straw crushing and returning plastic film residue recycling machine as claimed in claim 3, wherein the straw pulling and conveying device further comprises a middle rotating groove, an upper fixed knife is fixed on the front side of the crushing cylinder corresponding to the upper end of the feeding port, a U-shaped middle rotating groove with a downward opening is fixed on the upper side of the front part of the upper fixed knife, a left-right middle rotating shaft is arranged in the middle rotating groove, front shaft seats are respectively arranged on the left and right ends of the middle rotating shaft, a second compression spring is vertically arranged and fixedly connected between the upper end of each front shaft seat and the corresponding position of the inner side of the middle rotating groove, a plurality of middle rotating impellers capable of conveying the straw on the front side of the right driving sprocket to the feeding port when rotating counterclockwise are uniformly distributed on the outer side of the middle rotating shaft along the circumference, the left end of the middle rotating shaft is connected with the left part of the crushing shaft through belt wheel transmission and has opposite rotating directions, a lower, the front end of the lower fixed knife is close to the lower stalk pulling teeth at the corresponding position.

5. The suspended straw crushing and returning plastic film residue recycling machine as claimed in claim 1, 2, 3 or 4, wherein the plastic film residue recycling device comprises a rear frame, a suspension frame, an excavating device, a fan, a mesh belt type spike-tooth chain plate, a collecting device and a power assembly, the suspension frame is fixedly arranged on the front side of the middle part of the rear frame, the excavating device is arranged below the front part of the rear frame, the lower part of the rear frame behind the excavating device is provided with a soil crushing device, the soil crushing device comprises at least one soil crushing roller, a plurality of soil crushing knives are uniformly distributed around the outer side of the soil crushing roller, the mesh belt type spike-tooth chain plate is arranged behind the soil crushing device and can collect plastic film residues, an air outlet of the fan is arranged in front of the mesh belt type spike-tooth chain plate and can separate stubbles and plastic films, the collecting device is arranged at the rear part of the frame and can collect and discharge plastic films, the front part of the rear frame is provided with, the digging device, the mesh belt type spike tooth chain plate and the fan are respectively connected with the power assembly, and a rotating shaft of the soil crushing roller is in transmission connection with a rotating shaft of the digging device through a belt wheel.

6. The suspended straw crushing and returning plastic film residue recycling machine as claimed in claim 5, wherein the mesh belt type nail tooth chain plate is mounted on the rear frame through a lower chain wheel, a front upper chain wheel, a rear upper chain wheel and an upper tension chain wheel, a lower rotating shaft is rotatably mounted on the rear frame behind the soil crushing device, a front upper rotating shaft is rotatably mounted on the rear frame above the lower rotating shaft, a rear upper rotating shaft is rotatably mounted on the rear frame behind the front upper rotating shaft, the position of the rear upper rotating shaft is equal to the position of the front upper rotating shaft, an upper tension shaft is rotatably mounted on the rear frame below the rear upper rotating shaft, the lower chain wheel, the front upper chain wheel, the rear upper chain wheel and the upper tension chain wheel are fixedly mounted on the lower rotating shaft, the front upper rotating shaft, the rear upper rotating shaft and the upper tension shaft respectively, the mesh belt type nail tooth chain plate is sleeved outside the lower chain wheel, the front upper chain wheel and the rear upper chain wheel, and the middle part of, the front part of the mesh belt type spike tooth chain plate is arranged in the vertical direction, a first driving wheel is fixed on the front upper rotating shaft, and the first driving wheel is connected with the power assembly and can drive the front upper chain wheel to rotate.

7. The suspended straw crushing and returning plastic film residue recycling machine as claimed in claim 6, wherein the collecting device comprises a plastic film residue collecting box and a plastic film residue conveyor belt, the plastic film residue collecting box is arranged on the rear frame at the rear side of the upper tensioning shaft, the plastic film residue collecting box comprises a right side plate, a left side plate and a rear side plate, the right side plate and the left side plate are fixedly connected with the right side of the rear part and the left side of the rear part of the rear frame respectively, the lower end of the rear side plate is hinged to the lower side of the rear end of the rear frame through a plastic film residue box hinge shaft, film unloading oil cylinders are respectively arranged between the front side of the right part and the front side of the left part of the rear side plate and the corresponding position of the rear side of the rear frame, the plastic film residue conveyor belt capable of rolling up plastic film residues together is arranged on the left side of the lower part of the right side plate, the plastic film residue conveyor belt is provided with a first belt roller, a second belt, the rear side plate above the second rotating shaft is rotatably provided with a third rotating shaft, the rear frame below the third rotating shaft is rotatably provided with a lower tensioning shaft, the position of the lower tensioning shaft is equal to or lower than the position of the first rotating shaft, the first belt roller, the second belt roller, the third belt roller and the lower tensioning belt roller are fixedly arranged on the first rotating shaft, the second rotating shaft, the third rotating shaft and the lower tensioning shaft respectively, the residual film conveying belt is sleeved on the first belt roller, the second belt roller and the third belt roller are arranged outside, the middle part of the rear upper section of the residual film conveying belt is tightly pressed on the rear lower part of the lower tensioning belt roller, the first rotating shaft and the lower rotating shaft are connected together through belt wheel transmission, and the lower part of the rear frame corresponding to the rear position of the first belt roller is provided with a rear depth adjusting wheel.

8. The suspended straw crushing and returning plastic film residue recycling machine as claimed in claim 7, wherein a recycling hood is disposed above the mesh belt type spike-tooth chain plate corresponding to the position between the front upper rotating shaft and the rear upper rotating shaft, the recycling hood is a downward-opening casing, the lower side of the rear end of the recycling hood is close to the upper side of the rear side plate, the lower side of the right portion and the lower side of the left portion of the recycling hood are fixedly connected with the upper side of the right side plate and the upper side of the left side plate respectively, a front baffle is fixed on the lower side of the front portion of the recycling hood, the right rear side and the left rear side of the front baffle are fixedly connected with the front side of the right side plate and the front side of the left side plate respectively, an air inlet is disposed in the middle of the front side of the recycling hood corresponding to the front upper sprocket, a guide plate inclined in a high-low manner is fixed on the inner side of the recycling hood corresponding to the upper side of the air inlet, the exit end of second tuber pipe is located back cochain wheel the place ahead, the back frame front-mounted who corresponds preceding baffle front lower place has the back auger conveyor who carries from left to right, the fixed intercommunication of feed inlet of back auger conveyor upper end has the row's miscellaneous pipe that is preceding low back high form slope and cross-section for the rectangle, arrange miscellaneous pipe rear end upper side and preceding baffle downside fixed connection, it is close to with the mesh belt nail tooth chain plate that corresponds the position to extend backward to arrange miscellaneous pipe rear end downside, back auger conveyor right-hand member is equipped with the discharge gate, the pivot left end of back auger conveyor passes through band pulley transmission with the pivot of fan and is connected.

9. The hanging type straw crushing and returning plastic film residue recycling machine as claimed in claim 6, 7 or 8, wherein the upper sides of the right and left parts of the rear frame are fixedly connected with U-shaped adjusting frames with downward openings, the upper part of each adjusting frame is provided with a U-shaped sliding groove with downward openings, the left and right ends of the rear upper rotating shaft are respectively provided with a rear shaft seat capable of moving back and forth in the sliding groove at the corresponding position, and a third compression spring is fixedly connected between the front side of each rear shaft seat and the front side of the adjusting frame at the corresponding position.

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