CN118140626A - A straw returning to field combined operation machine - Google Patents

Abstract

The invention relates to a straw returning combined machine which is used for crushing and returning corn straw; comprises a pickup, a comb plate, a spiral auger, a conveying chain, a crushing device, a power chassis, a material dividing box and a combined soil preparation machine; the pickup picks up the straws and sends the straws into a rear spiral auger, the spiral auger sends the straws to an inlet of a conveying chain, the conveying chain sends the straws into a crushing device, the crushing device crushes the straws, a material separating box throws the crushed straws between a power chassis and a combined soil preparation machine, the combined soil preparation machine crushes and lifts the soil and mixes the scattered crushed straws together, and then ridging is carried out by a rear ridging ploughshare; the machine can pick up and crush straws once, and the crushed straws are thrown away, crushed soil, mixed and ridged to perform combined operation, so that the machine has the advantages of high working efficiency, small straw crushing length and the like.

Description

A straw returning to field combined operation machine

Technical Field

The invention relates to agricultural machinery, in particular to a straw returning to field combined operation machine.

Background technique

At present, the main methods of returning corn stalks to the fields in my country are: passing through the stomach, composting, burying, deep burying, crushing and mixing, and burning. Returning corn stalks to the fields in full can not only thoroughly improve the quality of cultivated land and solve the problem of increasingly poor soil, but also effectively reduce the air pollution caused by burning stalks, which is conducive to improving the physical properties of the tillage layer soil during the critical period of crops, thereby increasing corn yields, increasing soil organic matter and nutrient content, supplementing soil nutrients, increasing soil fertility, improving soil permeability and air permeability, water storage and moisture retention, improving soil aggregate structure, and keeping the soil loose. Jilin Agricultural University conducted a five-year field positioning test, and after annual corn stalk crushing and returning to the fields, it was found that compared with the control group, the soil organic matter content increased by 25%, and the total nitrogen, total phosphorus, and total potassium contents increased by 15%, 21%, and 31%, respectively. If the stalks are used reasonably, it will produce good economic and social benefits.

Heilongjiang Province mainly adopts the mode of crushing, mixing and ridge-forming to return corn stalks to the field: first, the rotating blade of the straw return machine drives the crushing blade on the blade to hit and cut the stalks on the ground to crush them, and then the tractor is suspended to perform the combined operation of the land preparation machine to crush, mix and ridge-forming. Since this method requires the machine to operate twice, the work efficiency is low and the operation cost is high. In addition, the length of the stalks crushed by the existing corn stalk return machine is generally about 10 cm, which is not conducive to crushing and mixing; the main component of the stalk is cellulose, which generally takes one to three years to rot. During the sowing process, crop seeds are very easy to be sown on the crushed stalks. It is not conducive to the rooting and germination of seeds near the overly long stalks. If there is drought and insufficient water supply, the seedlings will turn yellow or even die; and in the subsequent growth process of the crop, the soil is not solid due to the overly long stalks, and the root system of the plant is not firmly rooted, which is not conducive to the growth of the next season's crops, and it is easy to fall over in strong winds. In order to improve the quality and efficiency of straw return operations, make the straw more broken down and more integrated with the soil, the straw crushing length is kept below 4 cm to speed up the straw decay time, increase the organic matter content of the soil, increase soil fertility, and promote crop growth and yield.

The present invention is a straw returning to field combined operation machine, which obtains reasonable structural configuration according to the ridge planting mode of our province and the agronomic requirements of returning corn straw to the field, and has achieved excellent operation quality effect through experiments.

Summary of the invention

The purpose of the present invention is to provide a combined operation machine for returning corn stalks to the field. The machine is used for crushing corn stalks and returning them to the field. It can complete the picking up and crushing of the stalks, scattering of the crushed stalks, soil breaking, mixing and ridge-forming operations in one step. It has the advantages of high working efficiency and short straw crushing length.

To achieve the above-mentioned purpose, the technical scheme of the present invention is as follows: a straw returning combined operation machine comprises: a picker, a comb plate, a spiral auger, a conveyor chain, a crushing device, a feed inlet, a feed outlet, a power chassis, a material distribution box, a combined land leveling machine, a transfer case, a control room, a lifting cylinder, a lifting frame, a pin shaft seat, a side plate, a left hydraulic motor, a right hydraulic motor, a front axle, a rear axle and a transmission mechanism; the picker, the comb plate, the spiral auger, the conveyor chain, the crushing device, the transfer case, the material distribution box and the combined land leveling machine are arranged in sequence from front to back; a control room is provided on the upper left front of the power chassis; a lifting frame is provided in front of the power chassis, and the front end of the power chassis and the lifting frame are The rear end is rotatably connected through a pin shaft seat; a lifting cylinder is provided under the lifting frame, one end of the lifting cylinder is hinged to the lower front end of the lifting frame through a pin shaft, and the other end of the lifting cylinder is hinged to the lower front end of the power chassis through a pin shaft; the left hydraulic motor is fixedly installed on one side of the lifting frame, and the right hydraulic motor is fixedly installed on the other side of the lifting frame; side panels are fixedly installed on both sides of the lifting frame; both ends of the picker are installed on the side panels of the lifting frame through bearing seats; both ends of the spiral auger are installed on the side panels of the lifting frame through bearing seats, and a sprocket is fixedly installed on the right shaft head of the spiral auger; a comb plate is provided at the rear of the picker, and the rear end of the comb plate is fixedly connected to the bottom concave plate of the spiral auger; A conveyor chain is provided at the rear of the auger, and both ends of the front and rear shafts of the conveyor chain are installed on the lifting frame through bearing seats; two sprockets are fixedly installed on the left shaft head of the front shaft; a crushing device is fixedly installed above the power chassis, and the outer shell of the crushing device is barrel-shaped, and an end cover plate is installed on the left end face of the outer shell by bolts, a bracket is welded inside the outer shell, and a knife shaft is installed in the outer shell; the knife shaft is equipped with a front bearing seat, a fan impeller, a rear knife holder, an intermediate bearing seat and a front knife holder from left to right in sequence; the front bearing seat is fixedly installed on the end plate, and the intermediate bearing seat is fixedly installed on the bracket; the fan impeller, the rear knife holder and the front knife holder are fixedly installed on the knife shaft through a sleeve The rotating blade is rotatably connected to the front blade holder through a pin shaft, the rotating blade is rotatably connected to the rear blade holder through a pin shaft, and the fixed blade is fixedly connected to the rear blade holder through a bolt; the feeding port of the crushing device is connected to the rear end of the conveying chain, the discharging port of the crushing device is connected to the inlet of the dividing box, and the outlet of the dividing box is arranged between the power chassis and the combined land leveling machine; the dividing box has multiple outlets; a transfer case is fixedly installed on the upper rear of the power chassis, the front power output shaft of the transfer case is connected to the blade shaft of the crushing device, and the rear of the power chassis is hung with the combined land leveling machine through a hydraulic suspension device; the rear power output shaft of the transfer case is connected to the power input shaft of the combined land leveling machine.

The picker comprises: a spring tooth seat, a pick-up shaft, a roller, spring teeth and a comb plate; the pick-up shaft of the picker is welded with a roller, four rows of holes are opened on the roller, spring tooth seats are welded in the four rows of holes, and spring teeth are fixed on each spring tooth seat by bolts.

The front end of the comb plate is tangent to the drum, and interval gaps are arranged between the comb plates. The size and position of the gaps between the comb plates are adapted to the spring teeth, and the spring teeth can pass through the gaps between the comb plates when rotating.

A right-handed auger blade is welded on the left side of the spiral auger, and a left-handed auger blade is welded on the right side of the spiral auger.

The spring tooth structure is a spiral spring, half of which is left-handed and the other half is right-handed, and the middle is connected to form an n-type structure. Both ends of the spiral spring extend into straight sections to form toothed rods.

The transmission mechanism includes: a transfer case, a left hydraulic motor, and a right hydraulic motor; the transfer case drives the combined land preparation machine through a transmission shaft, the transfer case drives the knife shaft of the crushing device to rotate through a connecting sleeve, and the transfer case drives the left hydraulic motor and the right hydraulic motor to rotate through a hydraulic device; the sprocket of the left hydraulic motor is connected to a sprocket on the front axle through a chain, and the other sprocket on the front axle is connected to the sprocket on the picking shaft of the picker through a chain; the sprocket of the right hydraulic motor is connected to the sprocket of the spiral auger through a chain.

The picker used in the present invention adopts a drum structure with good strength and durability. The spring teeth are installed in the spring tooth seat in the circumferential hole of the picker drum. The spring teeth can be easily replaced without disassembling the shaft. The crushing device is axial flow type, and a fan impeller is provided at the end of the shaft, which can complete the suction, crushing and blowing of materials in one. The material is crushed finely and the straw crushing rate is high. The dividing box is provided with multiple outlets, and the straw is scattered more evenly after being crushed. This machine is a multifunctional all-in-one machine, which can complete the picking and crushing of straw in one time. The crushed straw is evenly scattered through the dividing box, and then combined with the land preparation machine for soil crushing, mixing and ridging operations. It has the advantages of high work efficiency, small straw crushing length, easy decomposition, etc.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a front view of the present invention;

FIG2 is a top view of FIG1 ;

Fig. 3 is a schematic structural diagram of a pulverizing device;

Fig. 4 is a schematic structural diagram of a cutter shaft assembly of a pulverizing device;

FIG5 is an isometric view of FIG4;

FIG6 is a left side view of FIG4;

Fig. 7 is a K-K view of Fig. 4;

Fig. 8 is a cross-sectional view taken along line A-A of Fig. 2;

FIG9 is an enlarged view of portion C of FIG2 ;

Fig. 10 is a cross-sectional view taken along line B-B of Fig. 9;

Figure 11 is a front view of the material distribution box;

FIG. 12 is a top view of FIG. 8 .

In the figure, 1. Pickup, 2. Screw auger, 3. Conveyor chain, 4. Feed inlet, 5. Crushing device, 6. Discharge outlet, 7. Power chassis, 8. Material distribution box, 9. Combined land leveling machine, 10. Transfer case, 11. Control room, 12. Lifting cylinder, 13. Lifting frame, 14. Pin seat, 15. Left hydraulic motor, 16. Right hydraulic motor, 17. Side plate, 18. Front axle, 19. Rear axle, 21. Right-hand auger blade, 22. Left Auger blade, 501. knife shaft, 502. front bearing seat, 503. fan impeller, 504. fixed blade, 505. rear knife holder, 506. intermediate bearing seat, 507. rotating blade, 508. front knife holder, 509. outer shell, 510. bracket, 511 end cover plate, 101. spring tooth seat, 102. picking shaft, 103. roller, 105. spring tooth, 106. comb plate, 801. inlet, 802. outlet.

Detailed ways

As shown in the figure, the present invention is a straw returning combined operation machine, comprising: a picker 1, a comb plate 20, a spiral auger 2, a conveyor chain 3, a crushing device 5, a feed inlet 4, a discharge port 6, a power chassis 7, a material distribution box 8, a combined land leveling machine 9, a transfer case 10, a control room 11, a lifting cylinder 12, a lifting frame 13, a pin shaft seat 14, a side plate 17, a left hydraulic motor 15, a right hydraulic motor 16, a front axle 18, a rear axle 19 and a transmission mechanism; the picker 1, the spiral auger 2, the conveyor chain 3, the crushing device 5, the transfer case 10, the material distribution box 8, and the combined land leveling machine 9 are arranged in sequence from front to back; a control room 11 is provided at the upper left front of the power chassis 7; a lifting frame 13 is provided in front of the power chassis 7, and the front end of the power chassis 7 is rotatably connected with the rear end of the lifting frame 13 through a pin shaft seat 14; the ... lifting frame 13 is provided in a rotating manner. A lifting cylinder 12 is provided under the lowering frame 13, one end of the lifting cylinder 12 is hinged to the lower front end of the lifting frame 13 through a pin shaft, and the other end of the lifting cylinder 12 is hinged to the lower front end of the power chassis 7 through a pin shaft; the left hydraulic motor 15 is fixedly installed on one side of the lifting frame 13, and the right hydraulic motor 16 is fixedly installed on the other side of the lifting frame 13; side panels 17 are fixedly installed on both sides of the lifting frame 13; both ends of the pickup 1 are installed on the side panels 17 of the lifting frame 13 through bearing seats; both ends of the spiral auger 2 are installed on the side panels 17 of the lifting frame 13 through bearing seats, and a sprocket is fixedly installed on the right side shaft head of the spiral auger 2; a comb plate 20 is provided at the rear of the pickup 1, and the rear end of the comb plate 20 is fixedly connected to the bottom concave plate of the spiral auger 2; a conveying chain 3 is provided at the rear of the spiral auger 2, and the front shaft 18 and rear shaft 18 of the conveying chain 3 are fixedly connected to the bottom concave plate of the spiral auger 2 Both ends of the shaft 19 are mounted on the lifting frame 13 through bearing seats; two sprockets are fixedly mounted on the left shaft head of the front shaft 18; a crushing device 5 is fixedly mounted above the power chassis 7, and the outer shell 509 of the crushing device 5 is barrel-shaped, and the left end face of the outer shell 509 is bolted with an end cover plate 511, a bracket 510 is welded inside the outer shell 509, and a knife shaft 501 is installed in the outer shell 509; the knife shaft 501 is equipped with a front bearing seat 502, a fan impeller 503, a rear knife holder 505, an intermediate bearing seat 506 and a front knife holder 508 from left to right in sequence; the front bearing seat 502 is fixedly mounted on the end plate 511, and the intermediate bearing seat 506 is fixedly mounted on the bracket 510; the fan impeller 503, the rear knife holder 505 and the front knife holder 508 are fixedly mounted on the knife shaft 5 through a sleeve 01; the rotating blade 507 is rotatably connected to the front tool holder 508 through a pin shaft, the rotating blade 507 is rotatably connected to the rear tool holder 505 through a pin shaft, and the fixed blade 504 is fixedly connected to the rear tool holder 505 through a bolt; the feed inlet 4 of the crushing device is connected to the rear end of the conveying chain 3, the discharge port 6 of the crushing device is connected to the inlet 801 of the distribution box 8, and the outlet 802 of the distribution box 8 is arranged between the power chassis 7 and the combined land leveling machine 9; the distribution box 8 has a plurality of outlets 802; a transfer case 10 is fixedly installed on the upper rear of the power chassis 7, the front power output shaft of the transfer case 10 is connected to the knife shaft 501 of the crushing device 5, and the rear of the power chassis 7 is hung with the combined land leveling machine 9 through a hydraulic suspension device; the rear power output shaft of the transfer case 10 is connected to the power input shaft of the combined land leveling machine 9.

The pickup 1 comprises: a spring tooth seat 101, a picking shaft 102, a roller 103, spring teeth 105, and a comb plate 20; the roller 103 is welded on the picking shaft 102 of the pickup 1, and four rows of holes are opened on the roller 103, and the spring tooth seat 101 is welded in the four rows of holes, and the spring teeth 105 are fixed on each spring tooth seat 101 by bolts.

The front end of the comb plates 20 is tangent to the roller 103, and there are interval gaps between the comb plates 20. The size and position of the gaps between the comb plates 20 are adapted to the spring teeth 105, and the spring teeth 105 can pass through the gaps between the comb plates 20 when rotating.

A right-handed auger blade 21 is welded on the left side of the spiral auger 2, and a left-handed auger blade 22 is welded on the right side of the spiral auger 2.

The spring tooth 105 is a spiral spring, half of which is left-handed and the other half is right-handed, connected in the middle to form an n-shaped structure, and both ends of the spiral spring extend into straight sections to form a gear rod.

The transmission mechanism includes: a transfer case 10, a left hydraulic motor 15, and a right hydraulic motor 16; the transfer case 10 drives the combined land preparation machine 9 through a transmission shaft, the transfer case 10 drives the knife shaft of the crushing device 5 to rotate through a connecting sleeve, and the transfer case 10 drives the left hydraulic motor 15 and the right hydraulic motor 16 to rotate through a hydraulic device; the sprocket of the left hydraulic motor 15 is connected to a sprocket on the front axle 18 through a chain, and the other sprocket on the front axle 18 is connected to the sprocket on the picking shaft 102 of the pickup 1 through a chain; the sprocket of the right hydraulic motor 16 is connected to the sprocket of the spiral auger 2 through a chain.

The working process is as follows: the forward direction of the straw return combined operation machine is forward, the forward movement and working action of the machine are controlled by the control room 11 of the power chassis 7, each working device adopts a modular design and is configured on the power chassis 7, the power of the whole machine is provided to the transfer case 10 by the power chassis 7, and then the transfer case 10 distributes the power to each working device through each power output shaft, and a lifting frame 13 is provided at the front end of the power chassis 7, and the lifting frame 13 is lifted and lowered by the lifting cylinder 12 below, and a picker 1 is installed at the front end of the lifting frame 13 A spiral auger 2 is provided at the rear end of the pickup 1, and a conveying chain 3 is connected to the rear end of the spiral auger 2. The outlet at the rear end of the conveying chain 3 is connected to the feeding port 4 of the crushing device 5, and the discharging port 6 of the crushing device is connected to the dividing box 8. The outlet 802 of the dividing box 8 is arranged between the power chassis 7 and the combined land leveling machine 9, and the combined land leveling machine 9 is suspended at the rear end of the power chassis 7; the front power output shaft of the transfer case 10 drives the knife shaft 501 of the crushing device 5 to rotate through the connecting sleeve, and the rear power output shaft of the transfer case 10 drives the combined land leveling machine 9 to rotate through the transmission shaft.

The sprocket of the left hydraulic motor 15 drives the front shaft 18 of the conveyor chain 3 to rotate through the chain, and the sprocket of the front shaft 18 drives the sprocket on the picking shaft 102 of the picker 1 to rotate through the chain; the sprocket of the right hydraulic motor 16 drives the sprocket of the spiral auger 2 to rotate through the chain; the picking shaft 102 drives the roller 103 to rotate, and the spring teeth 105 on the roller 103 pick up the straw covering the field, and follow the rotation of the roller 103. The comb plate 20 tangential to the roller 103 peels off the straw on the surface of the roller 103, and the straw is transmitted to the rear of the machine along the surface of the comb plate under the action of inertia, and the rotating picker 1 picks up the straw through the spring teeth 105 on the picker and sends it to the rear. The spiral auger 2 and the auger blades on both sides of the spiral auger 2 push the straw to the entrance of the middle conveyor chain 3, and the conveyor chain 3 sends the collected straw to the feeding port 4 of the crushing device 5. The wind force generated by the fan impeller 503 in the crushing device 5 sucks the straw into the crushing device 5, and the rotating blades in the crushing device 5 crush the straw. The wind force generated by the fan impeller 503 blows the crushed straw into the distribution box 8, and the distribution box 8 evenly scatters the straw between the power chassis 7 and the combined land preparation machine 9. The rotating knife shaft of the combined land preparation machine 9 crushes the stubble and at the same time crushes the soil and mixes it with the scattered crushed straw, and then ridges are formed by the rear ridging plow to complete the entire operation process.

Claims (6)

1. A straw returning combined operation machine, characterized in that: the straw returning combined operation machine comprises: a picker (1), a comb plate (20), a spiral auger (2), a conveying chain (3), a crushing device (5), a material inlet (4), a material outlet (6), a power chassis (7), a material distribution box (8), a combined soil preparation machine (9), a transfer case (10), a control room (11), a lifting cylinder (12), a lifting frame (13), a pin shaft seat (14), a side plate (17), a left hydraulic motor (15), a right hydraulic motor (16), a front axle (18), a rear axle (19) and a transmission mechanism; the picker (1), the spiral auger (2), the conveying chain (3), the crushing device (5), the transfer case (10), the material distribution box (8) and the combined soil preparation machine (9) are arranged in sequence from front to back; a control room (11) is provided at the upper left front of the power chassis (7); a lifting frame (13) is provided in front of the power chassis (7), and the front end of the power chassis (7) and the rear end of the lifting frame (13) are connected by The pin shaft seat (14) is rotatably connected; a lifting cylinder (12) is provided below the lifting frame (13); one end of the lifting cylinder (12) is hinged to the lower front end of the lifting frame (13) through a pin shaft, and the other end of the lifting cylinder (12) is hinged to the lower front end of the power chassis (7) through a pin shaft; a left hydraulic motor (15) is fixedly mounted on one side of the lifting frame (13), and a right hydraulic motor (16) is fixedly mounted on the other side of the lifting frame (13); side plates (17) are fixedly mounted on both sides of the lifting frame (13) The two ends of the pick-up (1) are mounted on the side plate (17) of the lifting frame (13) through bearing seats; the two ends of the spiral auger (2) are mounted on the side plate (17) of the lifting frame (13) through bearing seats, and a sprocket is fixedly mounted on the right shaft head of the spiral auger (2); a comb plate (20) is provided at the rear of the pick-up (1), and the rear end of the comb plate (20) is fixedly connected to the bottom concave plate of the spiral auger (2); the front end of the comb plate (20) is tangent to the roller (103); the rear end of the spiral auger (2) is provided A conveyor chain (3) is provided, and the front axle (18) and the rear axle (19) of the conveyor chain (3) are mounted on a lifting frame (13) at both ends via bearing seats; two sprockets are fixedly mounted on the left shaft head of the front axle (18); a crushing device (5) is fixedly mounted above the power chassis (7); the outer shell (509) of the crushing device (5) is in the shape of a cylinder, the left end surface of the outer shell (509) is mounted with an end cover plate (511) via bolts, and a bracket (510) is welded inside the outer shell (509). ), a knife shaft (501) is installed in the outer shell (509); the knife shaft (501) is equipped with a front bearing seat (502), a fan impeller (503), a rear knife holder (505), an intermediate bearing seat (506) and a front knife holder (508) from left to right; the front bearing seat (502) is fixedly mounted on the end plate (511), and the intermediate bearing seat (506) is fixedly mounted on the bracket (510); the fan impeller (503), the rear knife holder (505) and the front knife holder (508) are connected by The shaft sleeve is fixedly mounted on the knife shaft (501); the rotating blade (507) is rotatably connected to the front knife holder (508) through a pin shaft, the rotating blade (507) is rotatably connected to the rear knife holder (505) through a pin shaft, and the fixed blade (504) is fixedly connected to the rear knife holder (505) through a bolt; the feed inlet (4) of the crushing device is connected to the rear end of the conveying chain (3), the discharge outlet (6) of the crushing device is connected to the inlet (801) of the material distribution box (8), and the outlet ( 802) is arranged between the power chassis (7) and the combined land leveling machine (9); the material distribution box (8) has a plurality of outlets (802); a transfer case (10) is fixedly installed on the upper rear of the power chassis (7); the front power output shaft of the transfer case (10) is connected to the knife shaft (501) of the crushing device (5); the rear of the power chassis (7) is connected to the combined land leveling machine (9) through a hydraulic suspension device; the rear power output shaft of the transfer case (10) is connected to the power input shaft of the combined land leveling machine (9). 2. A straw returning combined operation machine according to claim 1, characterized in that: the picker (1) comprises: a spring tooth seat (101), a picking shaft (102), a roller (103), spring teeth (105), and a comb plate (20); the roller (103) is welded to the picking shaft (102) of the picker (1), four rows of holes are opened on the roller (103), and the spring tooth seats (101) are welded in the four rows of holes, and the spring teeth (105) are fixed to each spring tooth seat (101) by bolts. 3. A straw returning combined operation machine according to claim 1, characterized in that: the comb plates (20) are provided with interval gaps, the size and position of the gaps between the comb plates (20) are adapted to the spring teeth (105), and the spring teeth (105) can pass through the gaps between the comb plates (20) when rotating. 4. A straw returning combined operation machine according to claim 1, characterized in that: a right-handed auger blade (21) is welded on the left side of the spiral auger (2), and a left-handed auger blade (22) is welded on the right side of the spiral auger (2). 5. A straw returning combined operation machine according to claim 2, characterized in that: the spring tooth (105) structure is a spiral spring, half of which is left-handed and the other half is right-handed, connected in the middle to form an n-type structure, and both ends of the spiral spring extend into straight sections to form a gear rod. 6. A straw returning combined operation machine according to claim 1, characterized in that: the transmission mechanism comprises: a transfer case (10), a left hydraulic motor (15), and a right hydraulic motor (16); the transfer case (10) drives the combined land leveling machine (9) through a transmission shaft, the transfer case (10) drives the knife shaft of the crushing device (5) to rotate through a connecting sleeve, and the transfer case (10) drives the left hydraulic motor (15) and the right hydraulic motor (16) to rotate through a hydraulic device; the sprocket of the left hydraulic motor (15) is connected to a sprocket on the front shaft (18) through a chain, and the other sprocket on the front shaft (18) is connected to the sprocket on the picking shaft (102) of the picker (1) through a chain; the sprocket of the right hydraulic motor (16) is connected to the sprocket of the spiral auger (2) through a chain.