CN110199687B

CN110199687B - Straw crushing and collecting vehicle and collecting method

Info

Publication number: CN110199687B
Application number: CN201910371896.7A
Authority: CN
Inventors: 陈孝中
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-05-06
Filing date: 2019-05-06
Publication date: 2022-01-07
Anticipated expiration: 2039-05-06
Also published as: CN110199687A

Abstract

The invention discloses a straw smashing and collecting vehicle and a collecting method, and aims to overcome the defects that the efficiency of straw collection and field separation operation is low, the investment of special mechanical collecting equipment for straws is large, and the popularization is difficult. The automatic straw cutting and throwing machine comprises a traction vehicle head, a cutting and throwing fan and a trailer, wherein a self-discharging straw collecting mesh bag is installed on the trailer, the cutting and throwing fan comprises an arc-shaped shell, side plates connected to the left side and the right side of an arc-shaped mechanism, a power shaft and a plurality of throwing blades uniformly distributed and installed on the power shaft, the throwing blades are arranged in the shell, a cutting movable knife is arranged at the edge of each throwing blade, and a cutting fixed knife is installed on the inner wall of the shell and the cutting movable knife in a matched mode; the feeding pipe is thrown in the connection on the casing, throws the feed inlet setting of material pipe orientation self-discharging grass collecting pocket, and the feeding housing is connected to the casing lower extreme, all is equipped with the side direction feed inlet on the board of both sides, is equipped with the tangential feed inlet with the feeding housing intercommunication on the casing, connects the feeding wind channel between side direction feed inlet and the feeding housing, all is equipped with a plurality of inlet ports on the curb plate and on the feeding wind channel lateral wall.

Description

Straw crushing and collecting vehicle and collecting method

Technical Field

The invention relates to a straw collecting device, in particular to a straw smashing and collecting vehicle and a collecting method.

Background

Currently, straw collection methods are divided into mechanical collection and manual collection. Because the added value of the straw is low, the equipment for mechanically collecting the straw is large in investment and low in benefit, and the mechanical collection of the straw is difficult to popularize. The manual straw collection cannot be carried out due to high labor intensity, low efficiency and lack of strong labor in rural areas. Causing a great deal of straw to be burned in the field, wasting resources and polluting the environment.

Chinese patent publication No. CN105539247A discloses a straw loading vehicle, the straw loading vehicle is formed by ordinary agricultural vehicle or tractor repacking, when collecting the transport to field straw, the loading vehicle starts forward, receive the material frame and insert the straw in the straw near field ground and collect, the straw that receives on the material frame is collected a quantitative back and is stopped, start the drive piston cylinder, the drive piston cylinder telescopic link stretches out and upwards pushes up the pushing frame, receive the material frame and upwards move along with the pushing frame, after receiving the material frame and moving to the car hopper position, drive piston cylinder telescopic link stop motion, receive the straw on the material frame and fall into the car hopper under the action of gravity in, then the drive piston cylinder telescopic link inwards contracts the pulling pushing frame and resets. So relapse, realize the collection of straw, after piling up the straw in the car hopper, directly drive the load wagon appointed point and empty can, the transport is convenient. The straw loading vehicle with the structure has the advantages of small equipment investment and low cost, common farmers can bear purchase prices, the straw loading vehicle is high in working efficiency of field straw collection and carrying, and the labor intensity of the farmers is greatly reduced. However, the straw loading vehicle cannot continuously collect straws and does not have the function of crushing straws, a hopper with small capacity is difficult to load more long straws which are not crushed, and the hopper is still required to be driven to a specified point to be toppled over after being filled with straws, so that the efficiency of straw collection and field leaving operation is low.

Disclosure of Invention

The invention overcomes the defects of low operation efficiency of straw collection and field separation, large investment of special mechanical collection equipment for straws, low benefit and difficult popularization, and provides the straw crushing and collecting vehicle and the collecting method.

In order to solve the technical problems, the invention adopts the following technical scheme: a straw smashing and collecting vehicle comprises a traction vehicle head, a cutting and polishing fan and a trailer, wherein the cutting and polishing fan and the trailer are dragged by the traction vehicle head, land wheels are respectively installed at the lower ends of the cutting and polishing fan and the trailer, a self-discharging grass collecting mesh bag is installed on the trailer, the cutting and polishing fan comprises an arc-shaped shell, side plates connected to the left side and the right side of an arc-shaped mechanism, a power shaft and a plurality of throwing blades which are uniformly arranged on the power shaft, the throwing blades are arranged in the shell, a cutting movable cutter is arranged at the edge of the throwing blades, and a cutting fixed cutter is installed on the inner wall of the shell and matched with the cutting movable cutter; the discharging port which is arranged upwards is arranged on the casing, the discharging port is connected with the material throwing pipe, the material throwing pipe is arranged towards the feeding port of the self-discharging grass collecting net bag, the lower end of the casing is connected with the feeding housing, the lateral feeding ports are arranged on the two side plates, the arc-shaped casing is provided with the tangential feeding port communicated with the feeding housing, the feeding air channel is connected between the lateral feeding port and the feeding housing, and the side plates and the side wall of the feeding air channel are provided with a plurality of air inlet holes.

The traction headstock is started to pull the cutting and throwing fan and the trailer to move forward together, the cutting and throwing fan works, the power shaft drives the throwing blade to rotate so as to generate negative pressure in the arc-shaped casing, the overground straws are upwards sucked and enter the feeding housing and enter the arc-shaped casing through the tangential feeding hole and the lower end opening of the feeding air channel, the cutting movable blade on the throwing blade and the cutting fixed blade in the arc-shaped casing crush the straws, and the crushed straws are thrown into the self-discharging straw collecting net bag on the trailer through the throwing pipe under the action of centrifugal force and wind force of the throwing blade; after the self-discharging grass collecting net bag is filled with straws, the trailer is detached, the trailer with the empty self-discharging grass collecting net bag is reinstalled to continue operation, and the collection of the straws is completed; the trailer that unloads is pulled to storing up the meadow by the tractor, upwards hangs the self-discharging grass collecting mesh bag on the trailer, opens the discharge gate of self-discharging grass collecting mesh bag, makes the straw receive the action of gravity to fall down in the large-scale storage net naturally, accomplishes leaving the field and the storage of straw. The two feeding air ducts on the tangential feeding hole and the two side plates are arranged, so that the feeding area is effectively increased, and the feeding efficiency is improved. The air inlets arranged on the side plates and the feeding air channel promote the improvement of the feeding efficiency by airflow. The straw smashing and collecting vehicle is simple in structure, large in loading capacity, convenient to collect straw from a field, small in investment, low in cost, easy to popularize, high in straw collecting and field separating operation efficiency and capable of greatly promoting straw collection and utilization.

Preferably, a roller is arranged in the feeding housing, and a plurality of flail knives are arranged on the outer wall of the roller. Install the cylinder in the feeding housing, but a plurality of axial displacement's of equipartition installation slide bar in the cylinder, equidistant a plurality of supports of connection on the slide bar, correspond with the support on the cylinder and be equipped with the spout, the support runs through the spout and can slide in the spout, the knife that gets rid of the equal articulated Y shape on the support, install the spring holder in the cylinder, installation positioning spring between spring holder and the slide bar, installation pushing disk on the feeding housing, be equipped with the arc sand grip that is used for promoting the slide bar on the pushing disk, the thickness of arc sand grip increases from one end to the other end gradually, slide bar end installation ball, the ball supports on pushing disk. The flail knife rotating at a high speed picks up and cuts up the straws on the ground surface, and directly throws the straws to the rear tangential feed inlet and the lower end opening of the feeding air channel, so that the arrangement of the conveying auger of the existing collector is saved, and the picking efficiency of the cutting and throwing fan on the straws is greatly improved. In the rotating process of the roller, the balls at the end parts of the sliding rods slide through the arc-shaped convex strips, the sliding rods move in the direction away from the arc-shaped convex strips, and the balls slide away from the arc-shaped convex strips and return under the action of the positioning springs, so that the axial movement of the flail knife is realized, the straw is prevented from being wound on the flail knife, and the picking and cutting throwing effects of the flail knife are improved.

Preferably, bearings are installed between two ends of the roller and the feeding housing, fixed shafts are fixedly connected to positions, close to the two ends, in the roller, a plurality of avoidance grooves corresponding to the sliding rods one to one are formed between the outer walls of the fixed shafts and the inner wall of the roller, the sliding rods penetrate through the avoidance grooves, one fixed shaft is rotatably installed on the pushing disc, and the other fixed shaft is connected with the driving wheel. The roller is stably and reliably installed, and is favorable for reliable rotation of the roller. The roller is driven to rotate by the driving wheel and the fixed shaft, and the transmission is reliable.

Preferably, a disc frame plate is installed on the power shaft, a slot is formed in the middle of one end of each throwing blade, the slot is radially inserted into the disc frame plate, the throwing blades are fixedly connected with the disc frame plate, a plurality of arc-shaped frame plate blades are uniformly distributed on the two side faces of the disc frame plate close to the edges, and shifting teeth are installed on the two side faces of the disc frame plate close to the middle. The suction and the wind pressure generated by the frame plate fan blades are beneficial to the feeding efficiency of the feeding air duct and the tangential feeding hole and the throwing efficiency of the cutting and throwing fan. The high-speed rotating poking teeth break up the straws entering the cutting and polishing fan from the feeding air duct, and the straw blockage phenomenon is reduced.

Preferably, the positions of the left side edge and the right side edge of the throwing blade, which are close to the power shaft, are provided with guide grooves which are concave and arc-shaped. The guide groove plays a certain role in guiding the straws, the straws are favorably thrown to the inner wall of the arc-shaped shell under the action of centrifugal force to be crushed, and meanwhile, the straws are favorably thrown outwards.

Preferably, the cross section of the feeding air duct is of a U-shaped structure, and the opening side of the U-shaped feeding air duct is connected to a side plate of the cutting and polishing fan in a sealing mode. The feeding air channel arranged by the structure reduces the resistance to straw feeding.

Preferably, the trailer comprises a frame in a shape like a Chinese character tian formed by connecting a plurality of supporting beams, a plurality of pull cables are connected and tensioned between the front end and the rear end of the frame, positioning vertical rods are mounted at the corner positions of the frame, the self-discharging grass collecting mesh bag is supported on the pull cables, and the self-discharging grass collecting mesh bag is detachably connected with the positioning vertical rods. The trailer has firm structure, convenient disassembly and assembly, low price and large loading capacity, and changes the inconvenience of occupying land when not used in leisure areas.

Preferably, axial flow blades are arranged on the power shaft close to the two ends of the power shaft, the two axial flow blades are respectively arranged in the two feeding air channels, and the power shaft drives the axial flow blades to rotate to blow air to the lateral feeding hole. The axial flow fan blows air to the lateral feeding hole, and the straw sucking and picking effect is improved.

A straw smashing and collecting method of a straw smashing and collecting vehicle is characterized in that a traction headstock is started to pull a cutting and polishing fan and a trailer to move forward together, the traction headstock transmits power to a power shaft and a roller, the roller rotating at a high speed drives a flail knife to pick up straws on the ground surface, and the straws are cut and polished to a rear tangential feed port and a lower end opening of a feed air duct to enter the cutting and polishing fan; during the rotation of the roller, the balls at the end parts of the sliding rods slide through the arc-shaped convex strips, so that the sliding rods move in the direction away from the arc-shaped convex strips, and the balls slide away from the arc-shaped convex strips and then return under the action of positioning springs, so that the axial movement of the flail knife is realized; through secondary crushing of a movable knife on the throwing blade and a fixed knife in the arc-shaped shell, the straws which are crushed secondarily are thrown into a self-discharging straw collecting net bag on the trailer through a throwing pipe under the action of centrifugal force and wind force of the throwing blade; after the self-discharging grass collecting net bag is filled with the straws, the trailer is detached, the trailer with the empty self-discharging grass collecting net bag is reinstalled to continue operation, and the collection of the straws is completed; the trailer that unloads is pulled to storing up the meadow by the tractor, upwards hangs the self-discharging grass collecting mesh bag on the trailer, opens the discharge gate of self-discharging grass collecting mesh bag, makes the straw receive the action of gravity to fall down in the large-scale storage net naturally, accomplishes leaving the field and the storage of straw. The straw collection field-leaving operation efficiency is high, and the collection and utilization of the straw can be greatly promoted.

Compared with the prior art, the invention has the beneficial effects that: the straw smashing and collecting vehicle is simple in structure, continuous in collection, secondary in smashing, large in grass collecting capacity, convenient to leave a field, small in investment, low in cost, easy to popularize, high in straw collecting and field leaving operation efficiency, and capable of greatly promoting collection and utilization of straws.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present invention;

FIG. 2 is a schematic diagram of the cut and polish blower of the present invention;

FIG. 3 is a side view of the cut and polish blower of the present invention;

FIG. 4 is a schematic structural view of the trailer of the present invention;

FIG. 5 is a partially enlarged schematic view of the drum attachment location of the present invention;

in the figure: 1. a traction headstock, 2, a cutting and polishing fan, 3, a trailer, 4, a self-discharging grass collecting mesh bag, 5, an arc-shaped casing, 6, a side plate, 7, a power shaft, 8, a polishing blade, 9, a cutting movable blade, 10, a cutting fixed blade, 11, a discharge port, 12, a material polishing pipe, 13, a feeding cover, 14, a lateral feed port, 15, a tangential feed port, 16, a feeding air duct, 17, an air inlet hole, 18, a roller, 19, a flail knife, 20, a disc frame plate, 21, frame plate blades, 22, the axial-flow fan blade comprises a shifting tooth 23, a guide groove 24, a frame 25, a pull cable 26, a positioning upright rod 27, a hanging strip 28, a sliding rod 29, a support seat 30, a sliding groove 31, a spring seat 32, a positioning spring 33, a pushing disc 34, an arc-shaped convex strip 35, a ball 36, a bearing 37, a fixed shaft 38, a transmission wheel 39, a spring connector 40, a knife board 41, a knife edge 42 and an axial-flow fan blade.

Detailed Description

The technical scheme of the invention is further described in detail by the following specific embodiments in combination with the attached drawings:

example (b): a straw crushing and collecting vehicle (see attached figures 1 to 5) comprises a traction head 1, a cutting and polishing fan 2 dragged by the traction head and a trailer 3, wherein land wheels are respectively installed at the lower ends of the cutting and polishing fan and the trailer, a self-discharging grass collecting mesh bag 4 is installed on the trailer, the cutting and polishing fan comprises an arc-shaped shell 5, side plates 6 connected to the left side and the right side of an arc-shaped mechanism, a power shaft 7 and a plurality of throwing blades 8 uniformly installed on the power shaft, the throwing blades are arranged in the shell, cutting movable blades 9 are arranged at the edges of the throwing blades, cutting fixed blades 10 are installed on the inner wall of the shell and matched with the cutting movable blades, and the cutting movable blades and the cutting fixed blades are both triangular; the discharging port 11 which is arranged upwards is arranged on the casing, the discharging port is connected with the material throwing pipe 12, the material throwing pipe is arranged towards the feeding port of the self-discharging grass collecting mesh bag, the lower end of the casing is connected with the feeding housing 13, the lateral feeding ports 14 are arranged on the two side plates, the arc-shaped casing is provided with the tangential feeding port 15 communicated with the feeding housing, the feeding air duct 16 is connected between the lateral feeding port and the feeding housing, and the tangential feeding port is parallel and level with the lower end opening of the feeding air duct. A plurality of air inlets 17 are arranged on the side plate and the side wall of the feeding air duct. The feeding device comprises a feeding housing, a roller 18 is arranged in the feeding housing, a plurality of flail knives 19 are arranged on the outer wall of the roller, a plurality of sliding rods 28 capable of moving axially are uniformly arranged in the roller, a plurality of supports 29 are connected with the sliding rods at equal intervals, sliding grooves 30 are correspondingly arranged on the roller and the supports, the supports penetrate through the sliding grooves and can slide in the sliding grooves, the Y-shaped flail knives are hinged on the supports, the flail knives are hinged with the supports through hinged shafts, torsion springs are connected between the flail knives and the supports, the torsion springs are sleeved on the hinged shafts, and the axes of the hinged shafts are parallel to the axes of the roller. Install spring holder 31 in the cylinder, install positioning spring 32 between spring holder and the slide bar, installation pushing disk 33 on the feeding housing, be equipped with the arc sand grip 34 that is used for promoting the slide bar on the pushing disk, the thickness of arc sand grip increases from one end to the other end gradually, slide bar end installation ball 35, the ball supports on pushing disk. The bearing 36 is arranged between the two ends of the roller and the feeding cover shell, the positions close to the two ends in the roller are fixedly connected with the fixed shafts 37, a plurality of avoiding grooves which correspond to the slide bars one by one are arranged between the outer walls of the fixed shafts and the inner wall of the roller, the slide bars penetrate through the avoiding grooves, one fixed shaft is rotatably arranged on the pushing disc, and the other fixed shaft is connected with the driving wheel 38. The roller is internally provided with a spring seat which is tightly connected with the positions close to the two ends, a plurality of avoiding grooves which correspond to the slide bars one by one are arranged between the outer wall of the spring seat and the inner wall of the roller, the slide bars run through the avoiding grooves, spring connectors 39 are arranged on the slide bars and correspond to the spring seats, and positioning springs are arranged between the spring connectors and the spring seats. Two knife boards 40 are arranged at the end part of the flail knife, the two knife boards are connected together to form a V-shaped structure, and V-shaped cutting edges 41 are arranged on the edges of three sides of each knife board. The traction headstock is a tractor, the power shaft and the driving wheel at the end part of the roller are both powered by the tractor, and a driving belt is arranged among the driving wheel, the power shaft and the tractor.

A disc frame plate 20 is installed on a power shaft, a slot is formed in the middle of one end of each throwing blade, the slot is radially inserted into the disc frame plate, the throwing blades are tightly connected with the disc frame plate, a plurality of arc frame plate blades 21 are uniformly distributed on the two side faces of the disc frame plate close to the edge positions, a poking tooth 22 is installed on the two side faces of the disc frame plate close to the middle position, the poking teeth are obliquely arranged, and guide grooves 23 which are concave and arc are formed in the positions, close to the power shaft, of the left side edge and the right side edge of each throwing blade. The inner end of the throwing blade is arranged close to the power shaft. Axial flow fan blades 42 are arranged on the power shaft close to the two ends of the power shaft, the two axial flow fan blades are respectively arranged in the two feeding air channels, and the power shaft drives the axial flow fan blades to rotate to blow air to the lateral feeding holes. The feeding air duct cross-section is the U-shaped structure, and the feeding air duct opening side sealing connection of U-shaped is on surely throwing the curb plate of fan, and feeding air duct upper end is evagination arc structure. The upper side wall, the lower side wall and the arc-shaped side wall of the U-shaped feeding air channel are provided with a plurality of air inlets.

The trailer comprises a frame 24 which is shaped like a Chinese character tian and is formed by connecting six supporting beams together, a plurality of pull ropes 25 are connected and tensioned between the front end and the rear end of the frame, positioning vertical rods 26 are installed at the corner positions of the frame, the self-discharging grass collecting mesh bag is supported on the pull ropes, and the self-discharging grass collecting mesh bag is detachably connected with the positioning vertical rods. The front end of the frame is connected with a drag hook which is connected with the rear end of the cutting and polishing fan. The self-discharging grass collecting mesh bag is provided with a feeding hole and a discharging hole, the feeding hole is tightly connected with the throwing pipe, the discharging hole is tied up by a rope, and the self-discharging grass collecting mesh bag is connected with a hanging strip 27.

The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the spirit of the invention as set forth in the claims.

Claims

1. A straw crushing and collecting vehicle is characterized by comprising a traction vehicle head, a cutting and polishing fan and a trailer, wherein the cutting and polishing fan and the trailer are dragged by the traction vehicle head, land wheels are respectively arranged at the lower ends of the cutting and polishing fan and the trailer, a self-discharging grass collecting mesh bag is arranged on the trailer, the cutting and polishing fan comprises an arc-shaped shell, side plates connected to the left side and the right side of the shell, a power shaft and a plurality of throwing blades uniformly arranged on the power shaft, the throwing blades are arranged in the shell, a cutting movable cutter is arranged at the edge of each throwing blade, and a cutting fixed cutter is arranged on the inner wall of the shell and matched with the cutting movable cutter; the machine shell is provided with an upward discharge port, the discharge port is connected with a material throwing pipe, the material throwing pipe is arranged towards a feed port of the self-discharging grass collecting mesh bag, the lower end of the machine shell is connected with a feed housing, lateral feed ports are arranged on two side plates, a tangential feed port communicated with the feed housing is arranged on the arc-shaped machine shell, a feed air channel is connected between the lateral feed port and the feed housing, and a plurality of air inlet holes are formed in the side plates and the side wall of the feed air channel; a roller is arranged in the feeding housing, and a plurality of flail knives are arranged on the outer wall of the roller; but a plurality of axial displacement's of equipartition installation slide bar in the cylinder, equidistant a plurality of supports of connection on the slide bar, correspond on the cylinder with the support and be equipped with the spout, the support runs through the spout and can slide in the spout, the knife that gets rid of the equal articulated Y shape on the support, install the spring holder in the cylinder, install positioning spring between spring holder and the slide bar, installation pushing disk on the feeding housing, be equipped with the arc sand grip that is used for promoting the slide bar on the pushing disk, the thickness of arc sand grip increases from one end to the other end gradually, slide bar end portion installation ball, the ball supports on pushing disk.

2. The straw crushing and collecting vehicle as claimed in claim 1, wherein bearings are installed between both ends of the drum and the feeding housing, fixed shafts are fastened to positions near both ends in the drum, a plurality of avoiding grooves corresponding to the slide bars are formed between the outer wall of the fixed shaft and the inner wall of the drum, the slide bars pass through the avoiding grooves, one fixed shaft is rotatably installed on the pushing plate, and the other fixed shaft is connected with the driving wheel.

3. The straw crushing and collecting vehicle as claimed in claim 1, wherein the power shaft is provided with a disk frame plate, the throwing blade is provided with a slot at a middle position at one end, the slot is radially inserted into the disk frame plate, the throwing blade is tightly connected with the disk frame plate, a plurality of arc-shaped frame plate blades are uniformly distributed on two side surfaces of the disk frame plate close to the edge positions, and the two side surfaces of the disk frame plate are provided with shifting teeth close to the middle position.

4. The straw crushing and collecting vehicle as claimed in claim 1, wherein the left and right sides of the throwing blade are provided with concave arc-shaped guide grooves near the power shaft.

5. The straw crushing and collecting vehicle as claimed in claim 1, wherein the cross section of the feeding air duct is in a U-shaped structure, and the open side of the U-shaped feeding air duct is hermetically connected to a side plate of the cutting and polishing fan.

6. The straw crushing and collecting vehicle as claimed in claim 1, wherein the trailer comprises a frame in a shape like a Chinese character tian which is formed by connecting a plurality of supporting beams, a plurality of pulling ropes are connected and tensioned between the front end and the rear end of the frame, positioning vertical rods are arranged at the corners of the frame, self-discharging straw collecting net bags are supported on the pulling ropes and are detachably connected with the positioning vertical rods.

7. The straw crushing and collecting vehicle as defined in claim 1, wherein axial flow blades are mounted on the power shaft near both ends, the axial flow blades are mounted in the two feeding air ducts, and the power shaft drives the axial flow blades to rotate to blow air to the side feeding ports.

8. A straw smashing and collecting method of the straw smashing and collecting vehicle is characterized in that a traction head is started to pull a cutting and polishing fan and a trailer to move forwards together, the traction head transmits power to a power shaft and a roller, the roller rotating at a high speed drives a flail knife to pick up straws on the ground surface, and the straws are cut and polished to a rear tangential feed port and a lower end opening of a feed air duct to enter the cutting and polishing fan; during the rotation of the roller, the balls at the end parts of the sliding rods slide through the arc-shaped convex strips, so that the sliding rods move in the direction away from the arc-shaped convex strips, and the balls slide away from the arc-shaped convex strips and then return under the action of positioning springs, so that the axial movement of the flail knife is realized; through secondary crushing of a movable knife on the throwing blade and a fixed knife in the arc-shaped shell, the straws which are crushed secondarily are thrown into a self-discharging straw collecting net bag on the trailer through a throwing pipe under the action of centrifugal force and wind force of the throwing blade; after the self-discharging grass collecting net bag is filled with the straws, the trailer is detached, the trailer with the empty self-discharging grass collecting net bag is reinstalled to continue operation, and the collection of the straws is completed; the trailer that unloads is pulled to storing up the meadow by the tractor, upwards hangs the self-discharging grass collecting mesh bag on the trailer, opens the discharge gate of self-discharging grass collecting mesh bag, makes the straw receive the action of gravity to fall down in the large-scale storage net naturally, accomplishes leaving the field and the storage of straw.