CN115735522A - Self-propelled preserved szechuan pickle harvester - Google Patents

Abstract

The invention discloses a self-propelled preserved szechuan pickle harvester, wherein a leaf supporting device is arranged at the front end of a rack, an inclined conveying device is arranged at the rear side of the leaf supporting device, a leaf and fruit separating knife is arranged in the middle of the lower inclined edge of the conveying device, an impurity removing device is arranged right below the leaf and fruit separating knife, and a collecting bin is arranged at the transverse end part of the impurity removing device; the lower surface of the front end of the rack is provided with a root cutting device which is positioned at the rear lower part of the leaf supporting device; a vertically extending leaf crushing device is arranged at the rear side of the top end of the conveying device; the lower surface of the rack at the rear side of the root cutting device is rotatably provided with a front wheel, the lower surface of the rear side of the rack is rotatably provided with a rear wheel, a gearbox and an engine are sequentially arranged above the rear wheel from front to back, and the engine respectively provides a power source for the rear wheel, the root cutting device, the conveying device, the impurity removing device and the leaf crushing device. The harvester has the remarkable advantages of small size, root cutting, impurity removal and the like, can liberate a large amount of labor force, and can walk on the land like a piece.

Description

Self-propelled preserved szechuan pickle harvester

Technical Field

The invention relates to the technical field of agricultural machinery, in particular to a self-propelled preserved szechuan pickle harvester.

Background

The preserved szechuan pickle is also called as the cabbage and is one of three pickled vegetables in the world. The preserved szechuan pickle has a large planting area in China, is a special product in China, is a good product in pickled vegetables, and has a unique flavor of freshness, fragrance, crispness and tenderness. The production of the preserved szechuan pickle extends to 14 provinces and directly-governed cities throughout the country, wherein the Chongqing yield is the first, the quality is the crown of the nation, and the preserved szechuan pickle becomes a traditional export commodity and is sold in more than 10 countries of Japan, southeast Asia and Europe and America. The planting area of only 5 cities in the front of Zhejiang river reaches 30 ten thousand mu, and the total yield reaches 100 ten thousand mu.

But the harvesting mechanization level of the preserved szechuan pickle is particularly low, so most of the harvest is still manually harvested by hands.

Zhejiang places are many in peaceful places, and the terrain is flat, so that the method is suitable for large-scale machinery to enter and rob. And the land form is uneven in the hills in Chongqing, and the land form is often planted in a slicing manner, so that the method is not suitable for large-scale mechanical operation. The lack of mustard harvesters has become apparent. Therefore, the harvest of the preserved szechuan pickle is a necessary way by the technological progress.

Zhejiang province has many plains and flat terrain, and is suitable for large-scale machinery to enter and rob. And the land form is uneven in the hills in Chongqing, and the land form is often planted in a slicing manner, so that the method is not suitable for large-scale mechanical operation. The lack of mustard harvesters has become apparent. Therefore, the harvest of the preserved szechuan pickle is a necessary way by the technological progress.

Zhejiang province has many plains and flat terrain, and is suitable for large-scale machinery to enter and rob. In addition, in the multi-hilly season, the land is uneven and is often planted in a slicing mode, so that the method is not suitable for large-scale mechanical operation. The lack of mustard harvester has been obvious. Therefore, the harvest of the preserved szechuan pickle is a necessary way by the technological progress.

Compared with foreign countries, most of the preserved szechuan pickles are introduced into domestic processed preserved szechuan pickle products, and corresponding harvesting machines are not available. But the foreign carrot harvester is very advanced, adopts the clamping and pulling device, and has high efficiency.

Disclosure of Invention

Therefore, the invention provides a self-propelled preserved szechuan pickle harvester, which solves the problems in the prior art.

In order to achieve the above purpose, the invention provides the following technical scheme:

according to a first aspect of the invention, the self-propelled preserved szechuan pickle harvester comprises a frame, a leaf supporting device, a root cutting device, a conveying device, a leaf and fruit separating knife, an impurity removing device, a collecting bin, a leaf crushing device, a gearbox, an engine, front wheels and rear wheels;

the front end of the rack is provided with the leaf supporting device, the rear side of the leaf supporting device is provided with the inclined conveying device, the middle of the lower inclined edge of the conveying device is provided with the leaf and fruit separating knife, the impurity removing device is arranged right below the leaf and fruit separating knife, and the transverse end part of the impurity removing device is provided with the collecting bin;

the root cutting device is arranged on the lower surface of the front end of the rack and is positioned behind and below the leaf supporting device;

the rear side of the top end of the conveying device is provided with the vertically extending leaf crushing device;

cut root device rear side the frame lower surface rotates and is provided with the front wheel, the rear side lower surface of frame rotates and is provided with the rear wheel, the top of rear wheel has set gradually from preceding backward the gearbox with the engine, the engine does respectively the rear wheel cut root device conveyor device edulcoration device and the broken leaf device provides power source.

Furthermore, the leaf supporting device comprises a flying arch frame, a middle leaf supporting device and two side leaf supporting devices, the flying arch frame is installed on the rack, the middle part of the lower edge of the flying arch frame is provided with the middle leaf supporting device, the two ends of the lower edge of the flying arch frame are respectively provided with the side leaf supporting devices, the side leaf supporting devices are further connected with the rack, the width of each side leaf supporting device is larger than that of the middle leaf supporting device, the vertical distance of the gantry height of the flying arch frame is larger than that of a preserved szechuan pickle plant, and the front-back lengths of the middle leaf supporting device and the two side leaf supporting devices are larger than the plant spacing of the preserved szechuan pickle plant.

Further, the root cutting device comprises a crank disc, a transmission connecting rod, a fixed cutter and a movable cutter; the fixed knife is fixedly arranged on the lower surface of the front end of the rack, the movable knife capable of moving in a reciprocating mode is arranged below the fixed knife, a rotating shaft of the crank disk is in transmission connection with the gearbox through a transmission mechanism, the eccentric position of the crank disk is hinged to one end of the transmission connecting rod, and the other end of the transmission connecting rod is hinged to the end portion of the movable knife.

Further, the conveying device comprises a conveying frame and two clamping conveying assemblies; the conveying frame is obliquely arranged on the rack, the inclination angle of the conveying frame is less than or equal to 45 degrees, and two clamping conveying assemblies which are arranged side by side at the left and right are arranged on the conveying frame;

the clamping and conveying assembly comprises a driving clamping belt wheel, a driven clamping belt wheel and a clamping and conveying belt; the driving clamping belt wheel is rotationally connected to the lower end of the conveying frame, the driven clamping belt wheel is rotationally connected to the top end of the conveying frame, and the driving clamping belt wheel and the driven clamping belt wheel are in transmission connection through the clamping conveying belt;

the outer surface hoop of centre gripping conveyer belt is provided with a plurality of cylindricality centre gripping archs side by side, the protruding rubber material integrated into one piece structure that is of cylindricality centre gripping, the bellied surface of cylindricality centre gripping is the cylinder curved surface.

Furthermore, the impurity removing device comprises an impurity removing shell, a front impurity removing screw, a middle impurity removing screw and a rear impurity removing screw, the lower end of the impurity removing shell is mounted on the rack, and the front impurity removing screw, the middle impurity removing screw and the rear impurity removing screw which rotate in the same direction are sequentially arranged in the middle of the impurity removing shell from front to back; the front impurity removal auger, the middle impurity removal auger and the rear impurity removal auger are all spiral conveying augers; the middle impurity removing auger is positioned at the lower part of a connecting line of the front impurity removing auger and the rear impurity removing auger, the screw pitches of the front impurity removing auger and the rear impurity removing auger are equal, and the screw pitches of the front impurity removing auger and the rear impurity removing auger are different from the screw pitch of the middle impurity removing auger; the front impurity removal auger, the middle impurity removal auger and the rear impurity removal auger have the same rotation direction.

Furthermore, the leaf crushing device comprises a diameter-variable section, an equal-diameter section and a leaf crushing hob assembly, the lower end of the equal-diameter section is mounted on the rack, the diameter-variable section which is gradually reduced from top to bottom is mounted at the upper end of the equal-diameter section, the leaf crushing hob assembly is arranged inside the upper end of the equal-diameter section, and hobs of the leaf crushing hob assembly are distributed spirally; the upper end of the reducing section is positioned behind the top end of the conveying device in an inclined mode.

Further, still include the driver's support, the rear end upper portion of frame is provided with the driver's support.

Further, still include the steering wheel, the front upper place of driving support is provided with the steering wheel.

Further, the transmission device also comprises a clutch assembly, and the engine is in transmission connection with the gearbox through the clutch assembly.

Furthermore, the front wheels are distributed on the lower surface of the front part of the frame at equal intervals, and the diameters of the front wheels are smaller than those of the rear wheels.

The invention has the following advantages: compared with a large flat area harvesting machine, the machine has the advantages that the harvesting amount and efficiency are low, the machine is small and small, the working range is wider, a considerable part of tuber mustard fields are not suitable for large machines, and the advantage of small size is also important. Compared with the existing small-sized harvester, the small-sized harvester is a little bigger than the existing small-sized harvester, and is not as flexible as a small-sized harvester, but the small-sized harvester does not have the advantages of root cutting, impurity removal and fine leaf crushing, and the functions of the harvester are complete. The small-sized preserved szechuan pickle harvester has the advantages of strong practicability and large market area; according to the current situations of growth and planting of preserved szechuan pickle, the development experience of the existing preserved szechuan pickle harvester is combined, the learned knowledge and related books are utilized, the small-sized self-propelled harvesters suitable for hilly areas are innovatively designed, and the research and development of the preserved szechuan pickle harvester which is more practical are realized, so that a large amount of labor is liberated.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.

Fig. 1 is a front view of a self-propelled mustard tuber harvester according to some embodiments of the invention.

Fig. 2 is a top view of a self-propelled mustard tuber harvester according to some embodiments of the present invention.

Fig. 3 is a partial view of a self-propelled mustard tuber harvester according to some embodiments of the invention.

Fig. 4 is a left side view of a self-propelled mustard tuber harvester according to some embodiments of the invention.

Fig. 5 is a 3-tip view of a leaf supporting device of a self-propelled preserved szechuan pickle harvester according to some embodiments of the invention.

Fig. 6 is a structural view of an arch frame of a self-propelled preserved szechuan pickle harvester according to some embodiments of the present invention.

Fig. 7 is a partial structural view of a conveying device of a self-propelled preserved szechuan pickle harvester according to some embodiments of the invention.

Fig. 8 is a cross-sectional view of a conveying device of a self-propelled preserved szechuan pickle harvester according to some embodiments of the invention.

Fig. 9 is a structure diagram of an impurity removing auger of a self-propelled preserved szechuan pickle harvester according to some embodiments of the present invention.

Fig. 10 is a block diagram of a root cutting device of a self-propelled mustard tuber harvester according to some embodiments of the present invention.

Fig. 11 is a simplified schematic diagram of a crank-slider mechanism of a self-propelled mustard tuber harvester according to some embodiments of the invention.

FIG. 12 is a schematic view of a crank-slider mechanism of a self-propelled mustard tuber harvester according to some embodiments of the invention in one extreme case.

FIG. 13 is a cross-sectional view of a leaf crushing device of a self-propelled mustard tuber harvester according to some embodiments of the present invention.

Fig. 14 is a schematic transmission diagram of a self-propelled preserved szechuan pickle harvester according to some embodiments of the present invention.

In the figure: 1. the device comprises a frame, 2, a side leaf supporting device, 3, a middle leaf supporting device, 4, a flying arch frame, 5, a conveying device, 6, a leaf and fruit separating knife, 7, a root cutting device, 8, a front wheel, 9, an impurity removing shell, 10, a front impurity removing screw feeder, 11, a middle impurity removing screw feeder, 12, a rear impurity removing screw feeder, 13, a leaf crushing device, 14, a gearbox, 15, an engine, 16, a rear wheel, 17, a steering wheel, 18, a driving support, 19, a collecting bin, 20, a clamping conveying belt, 21, a fixed knife, 22, a movable knife, 23, a driving clamping belt wheel, 24, a driven clamping belt wheel, 25, a diameter changing section, 26, a leaf crushing rolling knife component, 27, an equal diameter section, 28, a crank disc, 29, a transmission connecting rod, 30, a walking transmission shaft, 31, a clutch assembly, 32, a conveying transmission component, 33, a speed changing main chain wheel, 34, a speed changing input end, 35, a speed changing output end, 36, a leaf crushing belt wheel, 37, an impurity removing transmission component, 38, a cutting root transmission belt wheel, 39 and an inclined shaft.

Detailed Description

The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 14, the self-propelled preserved szechuan pickle harvester in the first aspect embodiment of the invention comprises a frame 1, a leaf supporting device, a root cutting device 7, a conveying device 5, a leaf and fruit separating knife 6, an impurity removing device, a collecting bin 19, a leaf crushing device 13, a gear box 14, an engine 15, a front wheel 8 and a rear wheel 16; the front end of the frame 1 is provided with a leaf supporting device, the rear side of the leaf supporting device is provided with an inclined conveying device 5, the middle of the lower inclined side of the conveying device 5 is provided with a leaf and fruit separating knife 6, an impurity removing device is arranged right below the leaf and fruit separating knife 6, and the transverse end part of the impurity removing device is provided with a collecting bin 19; the lower surface of the front end of the rack 1 is provided with a root cutting device 7, and the root cutting device 7 is positioned at the rear lower part of the leaf supporting device; a vertically extending leaf crushing device 13 is arranged at the rear side of the top end of the conveying device 5; the lower surface of the rack 1 at the rear side of the root cutting device 7 is rotatably provided with a front wheel 8, the lower surface of the rear side of the rack 1 is rotatably provided with a rear wheel 16, a gearbox 14 and an engine 15 are sequentially arranged above the rear wheel 16 from front to back, and the engine 15 respectively provides a power source for the rear wheel 16, the root cutting device 7, the conveying device 5, the impurity removing device and the leaf crushing device 13.

In the above embodiment, it should be noted that the leaf and fruit separating knife 6 is a knife mounted on the conveying device for cutting off the preserved szechuan pickle and preserved szechuan pickle leaves in the conveying process, and the cutting power is mainly derived from the relative speed of the advancing speed of the machine and the belt speed of the conveying belt; the impurity removal device is one of innovation points of the machine, is improved by combining a harvester in a large plain area, and adopts three stirrers for impurity removal, wherein the three stirrers rotate in the same direction, but different screw pitches are adopted for impurity removal so as to achieve a real impurity removal effect, and power of an impurity removal box is transmitted by a belt pulley; the leaf crushing device 13 makes up the defects of other small self-propelled preserved szechuan pickle harvesters, can crush the leaves regularly and efficiently, and returns the leaves to the field orderly along with the machine, because farmers who plant preserved szechuan pickle particularly point out that the leaves must be crushed to return to the field, and under the condition of meeting the main harvesting operation, the harvester is additionally provided with the leaf crushing device; the self-propelled harvester is not adopted because the gasoline engine reduces the space, the diesel engine can be completely assembled on the harvester and normally works, and under the comprehensive condition of considering the performance and the economy, the harvester adopts a direct injection type hand-operated diesel engine with 11 horsepower to meet the normal requirements of people.

The key point of the design is to support the leaves, cut the roots, convey, remove impurities, and crush the leaves device, the diesel engine power, the clutch and the gearbox are directly selected and used, and the pursuit of innovation can not be pursued. The preserved szechuan pickle is a metamorphosis tumor crop, a part of the root of the preserved szechuan pickle grows outside, the growth directions of three to five leaves are different, and considering that the leaves are likely to remain if the preserved szechuan pickle and the preserved szechuan pickle leaves are directly separated, the angle of the conveying device is raised in a reasonable range, and the impurity removing device is additionally arranged.

The machine adopts a diesel engine to provide power and simultaneously harvests two rows of preserved szechuan pickle; the transmission system comprises a walking transmission shaft 30, a clutch assembly 31, a conveying transmission component 32, a speed change main chain wheel 33, a speed change input end 34, a speed change output end 35, a leaf crushing belt pulley 36, an impurity removal transmission component 37, a root cutting transmission belt pulley 38 and an inclined shaft 39, and the specific transmission relationship is shown in fig. 14.

The diesel engine transmits power to the gearbox through the belt pulley and the clutch, the gearbox transmits power to the driving rear wheel shaft through the chain wheel, and meanwhile, the power is distributed to two directions. One is two symmetrically distributed conveyor pulleys driven by a belt. The other is that the transmission is passed through the belt to garrulous leaf case, and garrulous leaf case passes through the belt and passes to the edulcoration case, and the edulcoration case distributes power to the root cutting device through belt drive. This is the principle of power distribution.

The practical work is that a rear wheel drives a machine to move forward, a leaf supporting device supports stems and leaves, a conveying belt clamps preserved szechuan pickle leaves, meanwhile, a root cutting device moves under the rotation of a belt pulley through a crank block device, a movable knife moves, a fixed knife does not move to cut off the roots of the preserved szechuan pickle, the preserved szechuan pickle moves along the belt under the clamping of the conveying belt until meeting a leaf and fruit separating knife, the preserved szechuan pickle is separated and falls into an impurity removing device under the condition of relative speed, the preserved szechuan pickle leaves continue to move upwards under the clamping of the belt, the preserved szechuan pickle leaves fall into a leaf crushing device after the tail end of the belt clamping is in a parabolic motion, the preserved szechuan pickle is moved to a collecting box under the rolling of a screw conveyer, and the leaves are crushed in the leaf crushing device and fall into the bottom of a rack to be returned to the field. The whole machine adopts a hand-operated diesel engine.

For example, the main technical parameters of a mustard harvester: loaded with a CLFZ12 diesel engine, 8.46kw (11 horsepower), two row harvest, two wheel drive, self-propelled. The leaf supporting distance is 290mm, and the clamping distance is 180mm. The belt speed was 2.62m/s.

Optionally, as shown in fig. 1 to 14, in some embodiments, the leaf supporting device includes a flying arch 4, a middle leaf supporting device 3, and two side leaf supporting devices 2, the flying arch 4 is mounted on the frame 1, the middle leaf supporting device 3 is mounted in the middle of the lower edge of the flying arch 4, the side leaf supporting devices 2 are mounted at two ends of the lower edge of the flying arch 4 respectively, the side leaf supporting devices 2 are further connected to the frame 1, the width of the side leaf supporting device 2 is greater than that of the middle leaf supporting device 3, the vertical distance of the gantry height of the flying arch 4 is greater than that of a mustard tuber plant, and the front-back lengths of the middle leaf supporting device 3 and the two side leaf supporting devices 2 are greater than the plant spacing of the mustard tuber plant.

In the above optional embodiments, it should be noted that the leaf supporting device of the harvester is mainly a leaf supporting device, and is fixed by the flying arch frame 4, and does not adopt a thin sheet design in a plow form, but adopts a box type design with a tip and a radian, and the structure can make the leaf supporting device more fixed, so as to prolong the service life of the harvester; the leaf supporting device can ensure the accuracy of machine design according to the size requirement, planting distance and furrow distance of the preserved szechuan pickle strictly. The conveying device is one of the core devices of the harvester.

More than 20 preserved szechuan pickle varieties are registered in China, and the planting furrow distance is between 20 and 35 cm. The data that the row spacing of the common preserved szechuan pickle is 330mm is adopted here, and 3 leaf supporting device tips are designed: a middle leaf supporting device 3 and two side leaf supporting devices 2.

The beneficial effects of the above alternative embodiment are: the main function of the flying arch 4 is to fix the vane holders (the middle vane holder 3 and the two side vane holders 2). The vertical distance of the gantry height of the flying arch frame 4 is larger than the height of the preserved szechuan pickle plants, namely, larger than 800mm. One part of the flying arch frame 4 is fixed with the lower leaf centralizer, and the other part is fixedly connected with the rack. The flying arch 4 tightly fixes the leaf supporting device through two screws.

The side leaf holders 2 on both sides are larger, and the middle leaf holder 3 in the middle is narrower, because when the leaf holders hold the leaves, the leaves can smoothly enter the clamping conveying device at the relative speed given by the harvester. If the middle leaf supporting device 3 is designed to be too wide, the clamping of the preserved szechuan pickle leaves can be affected, and even the just-supported leaves can be pressed down by the machine and cannot be compensated. The middle tip of the leaf supporting device works between two ditches, and mainly plays a role of supporting leaves, but the shape of the leaf supporting device is narrow, so that the leaf supporting device is only supported by an arch, and the other two larger supporting devices She Qitou are fixed on one side by the arch rack 4 and on the other side by the rack 1. The leaf centralizer is light in weight, so that a large fixing force is not needed, and the installation angle of the leaf centralizer is not 45 degrees, because if the leaf centralizer is at the same angle as the clamping conveying device, the length of the leaf centralizer is very short, and a good leaf-supporting effect cannot be achieved; therefore, the design of the leaf supporting device of the harvester is designed according to the planting requirements of the preserved szechuan pickle, the horizontal length of the leaf supporting device is 400mm and is larger than the plant spacing of the preserved szechuan pickle, and the bottom of the leaf supporting device is a flat radian curve, so that a good leaf supporting effect can be achieved.

Alternatively, as shown in fig. 1 to 14, in some embodiments, the root cutting device 7 includes a crank disk 28, a transmission link 29, a stationary knife 21 and a movable knife 22; the fixed knife 21 is fixedly arranged on the lower surface of the front end of the frame 1, the movable knife 22 capable of moving in a reciprocating manner is arranged below the fixed knife 21, a rotating shaft of the crank disk 28 is in transmission connection with the gearbox 14 through a transmission mechanism, the eccentric position of the crank disk 28 is hinged with one end of a transmission connecting rod 29, and the other end of the transmission connecting rod 29 is hinged with the end part of the movable knife 22.

In the above alternative embodiment, it should be noted that, because the stem and leaf of the existing small-sized mustard tuber harvester are separated from the root by the clamping and pulling device, the root is not pulled off, and the leaf is pulled off first. For this reason, in order to prevent the cutter knife from damaging the preserved szechuan pickle, if the distance is too high, the preserved szechuan pickle meat can be damaged, if the distance is too low, the ground soil can be cut, and the root cutting device can be damaged, so that the powered root cutting device 7 is arranged at a position 20mm away from the ground. The actual cutting position should start at 25 mm. The design principle of the root cutting device 7 is derived from the learned crank-slider mechanism. The rotation of the crank disk 28 drives the slider to move, and the slider and the static part form relative motion. If the slider and the stationary part are considered as two blades, a cutting movement is formed. The root cutting device is suitable for being used because a part of the root of the preserved szechuan pickle is exposed above the ground surface. The reason that the scheme of directly cutting by adopting the rotary knife is not adopted is that the rotary knife is not uniform in cutting compared with the crank-slider mechanism, the extension range of the slider knife is large, the slider knife is used on a wheat harvester, and the rotary knife is suitable for cutting weeds and other plants which do not need to be clamped and conveyed. This cutting knife is apart from backup pad and support column, and total thickness is 30mm, and is smaller and more exquisite, simple structure, easy to assemble.

Under the torque transmitted by the power, the crank disc 28 rotates to drive the transmission connecting rod 29 to do plane motion, and the transmission connecting rod 29 simultaneously drives the movable knife 22 to do reciprocating linear motion in the fixed knife groove. The movement of the moving blade 22 and the stationary blade 21 constitute a reciprocating cutting motion, thereby achieving the desired effect. The root cutting device of the self-propelled preserved szechuan pickle harvester has different fixed parts. The fixed knife 21 is installed on the frame through two installation plates, the moving knife 22 is not only dragged by the transmission connecting rod 29, but also blocked by the fixed knife 21 structure baffle plate forward and also blocked by the fixed knife 21 backward, that is, the moving knife 22 makes linear motion in the groove. The drive link 29 connects the two moving parts by means of a cylindrical structure, and the crank disk 28 is mounted and fixed by means of a vertical shaft.

The device adopts a centering type crank sliding block mechanism, the radius of the motion of a crank is assumed to be h2, the length of a connecting rod is h1, h1 is more than h2 when the reciprocating cutting motion is to be finished, the distance from the moving blade to the farthest position is h1+ h2, and the distance from the moving blade to the nearest position is h1-h2. So d = (h 1+ h 2) - (h 1-h 2), where d is the moving distance of the moving blade, resulting in d =2h1. Namely, the diameter distance of the crank disc is the maximum displacement of the movable knife; the radius of the crank is 10+50=60mm, but for the subsequent transmission, the radius of the crank is determined to be 65mm without changing h1 and h2.

According to other cutting machine experience, the clearance distance between the movable knife 22 and the fixed knife 21 is 5-7mm, here 5mm, for best cutting effect. Just because enlarged the diameter of crank disc, so that the maximum displacement volume of moving sword 22 is not equal to the crank diameter, but is equal to 2 times of the distance from the crank center to the nearest connecting rod center of rotation, namely the diameter of the connecting rod near the rotation point rotation circle of crank disc, and is the same with just diameter numerical value, does not change, changes the part that does not hinder the data, easy to assemble.

Therefore, the reciprocating distance of the movable blade 22 is 100mm. The working range of the cutting knife is at least 350mm, depending on the relative positions of the leaf holders, the holding device and the frame, explaining why 350mm is used, the width of the leaf holders in the middle is 100mm, the width of the mustard tuber gaps on both sides is 125mm, and the sum is 350mm, wherein the working range is defined as 350mm. The cutting knife is designed to be triangular. To facilitate the reciprocating cutting. In order to quickly enable the root of the preserved szechuan pickle to enter the cutting device, only the sharp part is more beneficial to the root to slide in, the triangular structure is stable, and the reciprocating motion cutting of the movable knife 22 can be easily realized.

Assuming that the blade is designed as an equilateral triangle with a side length of 50mm, the blade has a calculated horizontal length of 43.30mm. The cutting requirement of the root of the preserved szechuan pickle is relatively satisfied. The number of teeth of the stationary knife 21 is 350 ÷ 50=7, and similarly, the moving knife 22 is also provided with 7 cutting teeth. That is, the horizontal movement displacement of the slider in the crank-slider mechanism is 100mm, the bottom of the cutter tooth is 50mm wide, and the same root position is cut twice in the case of one rotation. As for the thickness, it is taken to be 5mm here. Through the calculation, the reciprocating type 350 mm-wide reciprocating type root cutting operation is realized by combining the motion of the crank slider mechanism; the distance h1=70mm between the two rotation centers of the transmission link 29, and the length of the transmission link 29 is designed to be 80mm according to actual installation and working requirements.

Alternatively, as shown in fig. 1-14, in some embodiments, the conveyor 5 comprises a carriage and two gripping and conveying assemblies; the conveying frame is obliquely arranged on the rack 1, the inclination angle of the conveying frame is less than or equal to 45 degrees, and two clamping conveying assemblies which are arranged side by side at the left and right are arranged on the conveying frame; the clamping conveying assembly comprises a driving clamping belt wheel 23, a driven clamping belt wheel 24 and a clamping conveying belt 20; the driving clamping belt wheel 23 is rotationally connected to the lower end of the conveying frame, the driven clamping belt wheel 24 is rotationally connected to the top end of the conveying frame, and the driving clamping belt wheel 23 and the driven clamping belt wheel 24 are in transmission connection through the clamping conveying belt 20; the outer surface hoop of centre gripping conveyer belt 20 is provided with a plurality of cylindricality centre gripping archs side by side, and the cylindricality centre gripping is protruding to be rubber material integrated into one piece structure, and the bellied surface of cylindricality centre gripping is the cylinder curved surface.

In the above optional embodiment, it should be noted that the conveying device 5 is designed to have an allowed maximum angle of 45 ° so as to be ready for subsequent impurity removal, and has a small angle and a small occupied space compared with other machines, but cannot well remove the residual leaves and roots on the preserved szechuan pickles, and the conveying device 5 increases the angle without affecting the small-sized advantage of the harvester, so that not only can the residues be removed, but also the long leaves can be broken more finely, and the land can be refilled more intensively, so as to ensure that the leaves do not harm the next crop.

The conveying device is a core device of the preserved szechuan pickle harvester, and the design of the clamping and conveying shell influences the harvesting effect, the transmission mechanism, the installation and fixation of the whole harvester and the installation of other parts; the clamping conveying shell temporarily lifts the rack by 20mm vertically, and the clamped leaves can be solved in the impurity removing device. The accurate installation of centre gripping conveying shell is fixed and is not only influenced preceding hold up the leaf device, cut the root device, plays decisive effect to edulcoration device and garrulous leaf device moreover, calculates the centre gripping earlier and carries the casing, can regard as basic design and installation basis to other various devices, also is the important component part of frame design.

The design of the clamping belt is a soul of the clamping and conveying device, the clamping belt not only plays a role in clamping and conveying, but also has the function of transmitting power and torque. The clamping force cannot be too large or too small, and the problem of leaf strength is also considered. In view of practicality, economy and feasibility.

The temporary selection of the harvester clamping conveyer belt is a common V-shaped belt with a cylindrical clamping surface. The clamping conveying shell is additionally provided with a supporting device to keep the clamping belt tensioned, and the clamping conveying shell plays a role of an idler wheel.

In order to keep the conveying belt with good leaf-grabbing capacity, the direction of the force of the clamping belt to the preserved szechuan pickle leaves is the direction of the absolute speed of the belt; a cylindrical surface structure is specially added on the smooth end surface of the conveying belt; the cylindrical structures on the conveyor belt, which have a diameter of 70mm, produce a vertical upward support only by mutual pressing, at the same time having a speed opposite to the forward speed of the machine. If the contact is made completely, the leaf may be pinched off, and in view of this, the number of mustard tuber leaves is large and large, leaving a 45mm leaf gap. Through this kind of column rubber devices that snatchs to and leave gapped centre gripping mode and satisfy the steady transport of preserved szechuan pickle.

Optionally, as shown in fig. 1 to 14, in some embodiments, the impurity removing device includes an impurity removing housing 9, a front impurity removing auger 10, a middle impurity removing auger 11, and a rear impurity removing auger 12, a lower end of the impurity removing housing 9 is mounted on the rack 1, and the front impurity removing auger 10, the middle impurity removing auger 11, and the rear impurity removing auger 12 which rotate in the same direction are sequentially arranged in the middle of the impurity removing housing 9 from front to rear; the front impurity removal auger 10, the middle impurity removal auger 11 and the rear impurity removal auger 12 are all screw conveying augers; the middle impurity removing auger 11 is positioned at the lower part of the connecting line of the front impurity removing auger 10 and the rear impurity removing auger 12, the screw pitches of the front impurity removing auger 10 and the rear impurity removing auger 12 are equal, and the screw pitches of the front impurity removing auger and the rear impurity removing auger are not equal to the screw pitch of the middle impurity removing auger 11; the front impurity removing auger 10, the middle impurity removing auger 11 and the rear impurity removing auger 12 have the same rotating direction.

In the above alternative embodiment, it should be noted that the angle between the holding and conveying shell and the horizontal ground is 45 ° at the maximum allowable angle, in order to make more room for installing and fixing the trash shell and the internal structure. And the actual effect of impurity removal of the auger designed according to Wu Weiyao is good, so the harvester is provided with the impurity removal device. The preserved szechuan pickle is held by the centre gripping conveyor belt and is carried towards the slant, if the edulcoration case is too far forward, will meet the preserved szechuan pickle stem leaf and have not been separated by leaf fruit separation sword, just blocked by the edulcoration case, can influence the quality of preserved szechuan pickle results, if the edulcoration case is too far back, preserved szechuan pickle can not fall in the edulcoration case, directly falls to the outside, more can not play an effective role. The upper part of the impurity removing box body needs to have enough space for conveying, the deformed stem of the preserved szechuan pickle plant is known to be large, the maximum vertical height is 150mm, and partial leaves are connected above the deformed stem, so that a part of height space is reserved for the leaves.

The design of edulcoration case is similar to a right trapezoid shape, trapezoidal hypotenuse side is facing to the full open space of centre gripping conveyer belt, because the vertical height of preserved szechuan pickle of getting is 150mm, the height of keeping for the leaf is 50mm, the centre gripping of design carries the casing in earlier stage, in order to effectively carry the leaf of preserved szechuan pickle, it is 20mm apart from the rack height, so the hypotenuse of edulcoration casing is confirmed according to the distance of design all the time, carry to up 45 centre gripping based on the centre gripping, so trapezoidal hypotenuse casing hypotenuse and horizontal direction's angle also is 45, but the length of bottom side can not be too short on the trapezoidal casing, because too short can't ann put down the screw feeder, still one reason is that the preserved szechuan pickle rolls away easily, so, confirm a reasonable high vital.

The design range of the device is determined according to 45-degree clamping conveying belts, if the length of the upper bottom side is only 17.2mm according to the illustrated range, the preserved szechuan pickle can roll out in the impurity removing box, so that the upper bottom of the trapezoid is 100mm, the height of the trapezoid is changed from 310.9mm to 228.1mm through calculation, and the height is larger than the length of the preserved szechuan pickle by 150mm, and the actual requirement is met. The length of the lower bottom edge of the rear edge is the maximum size determined by the leaf crushing device of the rear edge, the leaves fall when being clamped and conveyed by the two belts, and the size of the impurity removing device is determined before the maximum size, so that the size is the best size capable of being accommodated, the upper bottom edge can be adjusted, and the length of the lower bottom edge is the best. And the installation of the impurity removal shell is required, and the lower bottom edge is vertically aligned with the leaf and fruit separation knife.

The width of the whole impurity removing shell is consistent with that of the rack, so that transmission is facilitated, and on the other hand, the ideal effect of removing residual impurities is achieved in order to allow the preserved szechuan pickle to roll in the rack. The bottom of edulcoration casing has been made the strip structure that can fall the incomplete miscellaneous, and first can save material, and the machine load can be reduced to the second, if, incomplete root incomplete leaf or earth have filled up the edulcoration case, then seriously influence the edulcoration effect to can't get rid of these things, only lift the edulcoration box body off, and the possibility of this realization is 0 basically.

According to the space size, under the condition of meeting the requirement, the self-propelled preserved szechuan pickle harvester impurity removing device is provided with as many screw feeders as possible, wherein 3 screw feeders are selectively arranged. The three screw conveyors have the same size and the same rotating direction, so that the impurity removal of the preserved szechuan pickle is facilitated, and the preserved szechuan pickle moves out axially, but the screw pitches of the screw conveyors on the left side and the right side are different from those of the screw conveyors in the middle, and the impurity removal effect is also achieved.

Optionally, as shown in fig. 1 to 14, in some embodiments, the leaf crushing device 13 includes a reducing section 25, an equal-diameter section 27, and a leaf crushing hob assembly 26, a lower end of the equal-diameter section 27 is mounted on the frame 1, an upper end of the equal-diameter section 27 is mounted with the reducing section 25 which gradually reduces from top to bottom, the leaf crushing hob assembly 26 is disposed inside an upper end of the equal-diameter section 27, and hobs of the leaf crushing hob assembly 26 are distributed in a spiral shape; the upper end of the reducing section 25 is located obliquely rearward of the top end of the conveyor 5.

The design of the leaf crushing device of the self-propelled preserved szechuan pickle harvester is originally based on the requirement that a preserved szechuan pickle grower needs to crush the leaves and return the leaves to the field after the preserved szechuan pickle is harvested. The preserved szechuan pickle leaves are easy to rot in the ground, are not sanitary and have great harm.

The prior preserved szechuan pickle harvester treats the leaves by smashing the leaves above the clamping conveyer belt through two rotary knives and returning the leaves to the field, although the mode is simple, the smashed leaves can fly everywhere and everywhere,

through the selective installation of the clamping and conveying device of the mustard tuber harvester at a high angle of 45 degrees, a leaf crushing device can be additionally arranged at the tail end of the large belt pulley. The leaf crushing device of the harvester consists of a leaf crushing shell and a leaf crushing roller cutter. When the leaves conveyed by the clamping conveyor belt are separated by the belt, the leaves are slowly loosened and do parabolic motion. The leaves are thrown into the leaf crushing box body and are rotated by the roller with power, the roller cutter is used for crushing the leaves, the crushed leaves fall into the field below the rack along the box body, and when the harvester moves forwards, the preserved szechuan pickle is harvested while the leaves are crushed, and the leaves fall into the field, so that the leaves cannot be broken everywhere. Therefore, this solution is abandoned. It is thus envisaged that, as with the trash removal device, the leaves may be fed into a box-like device and then processed to be returned collectively to the field. The power of the leaf crushing device is transmitted to the impurity removing device through the belt pulley, so that the design of the leaf crushing device has good transmission performance.

The design of the leaf crushing shell is the direction of the design of the leaf crushing device. Because it has an inlet for feeding the leaves and a direction of fall of the leaves after the chopping is completed.

The scheme determined at the beginning is that the leaves are fed from the upper side, and are discharged from the other side of the harvester after being chopped by the leaf chopping knife, but later considering the problem of the arrangement direction of the rotary knife, if the rotary knife shaft is arranged along the advancing direction of the machine, the transmission route of the whole machine is not favorable, if the rotary knife shaft is obliquely arranged, the stability of the device and the transmission arrangement are difficult to realize, if the rotary knife shaft is arranged in the same direction as an auger in the impurity removing device, the transmission route is well arranged, but the blades chop the leaves and have no force capable of pushing the leaves out.

Then, the leaf crushing roller cutters are arranged according to the direction of the auger, and then the flat plate at the lower side is made to be inclined, so that the leaves can be obliquely discharged out of the machine body under the action of self gravity after being crushed. Such a solution is indeed possible, but it is thought that the frame is 100mm away from the ground, and by means of gravity, falls directly down to discharge the harvester body, which is more effective, the transmission is easy to arrange, the design of the device box is simple, and thus the previous solution is abandoned.

The opening of the broken leaf shell comprises the vertical direction of the place for separating the leaves, the broken leaf shell can be roughly divided into two parts during design, the upper part is used for collecting and feeding the fallen leaves, and the lower part is used for receiving the broken leaves, and only the size design of the broken leaf hob needs to be followed. The lower part can be completely smaller than the upper part and the shredded leaves are left to the task of simply falling off, without requiring too much space.

The direction of the broken-leaf hob is the same as the auger of the impurity removal device, and the difference is that the hob is a sharp device along a spiral line. It is also attached to the roller, and the leaf crushing operation is completed by giving a power to rotate. Because the preserved szechuan pickle leaves are originally long, the plant leaves can be easily crushed without large force and rotating speed under the action of the leaf crushing hob, and the plant leaves are returned to the field regularly along with the advancing of the harvester. For this reason, only one hob is designed and its minimum rotational speed requirement is low.

Optionally, as shown in fig. 1 to 14, in some embodiments, a steering bracket 18 is further included, and the steering bracket 18 is disposed at an upper portion of the rear end of the frame 1.

Optionally, as shown in fig. 1 to 14, in some embodiments, the steering wheel 17 is further included, and the steering wheel 17 is disposed in front of and above the steering bracket 18.

In the above alternative embodiment, it should be noted that the mustard harvester needs to be able to flexibly shuttle in the ground, so the machine adopts a small structure and a two-row collection mode. And the driver's cabin mounted on the driving support 18 has small standing area, and the occupied area is reduced by adopting the mode of automatically designing the steering wheel 17 to control so as to prevent other obstacles such as trees.

Optionally, as shown in fig. 1 to 14, in some embodiments, a clutch assembly 31 is further included, and the engine 15 is in transmission connection with the transmission 14 through the clutch assembly 31.

Alternatively, as shown in fig. 1 to 14, in some embodiments, the front wheel 8 is provided in plurality, the plurality of front wheels 8 are distributed on the lower front surface of the frame 1 at equal intervals, and the diameter of the front wheel 8 is smaller than that of the rear wheel 16.

Clutches are devices that cut off and combine power. The clutch of the self-propelled preserved szechuan pickle harvester is used for cutting off the power combination between the diesel engine and the gearbox, and the selected clutch has the requirements of not only having the clutch effect, but also meeting the transmission requirements, such as the size requirement. The clutch of the engine is a 6-spring three-groove clutch assembly which can be directly installed and fixed at the flywheel end of the diesel engine, the diameter of the clutch assembly is 220mm, the aperture of a clutch plate is 28mm, the width of a grooved pulley is 65mm, and three belts drive outwards.

The gearbox is a gear reduction that conforms to an overall transmission. The gearbox of the self-propelled preserved szechuan pickle harvester is designed by self, the power of a diesel engine is transmitted to the input end of the gearbox through a clutch belt. On one hand, the power is transmitted to the two large belt pulleys of the conveying belt, on the other hand, the power is transmitted to the leaf crushing device, and meanwhile, one path of power is transmitted to the two rear wheel driving shafts.

Because the working terrain of the preserved szechuan pickle harvester is complex and the speed is not high, the preserved szechuan pickle harvester adopts goat's horn and herringbone pattern tires, and the preserved szechuan pickle harvester has good braking and operating performance. The diameter and the width are respectively 300mm and 80mm.

The harvester mainly comprises a leaf supporting device, a root cutting device, a clamping and conveying device, a leaf and fruit separating knife, an impurity removing device, a leaf crushing device, a collecting device and the like. The self-propelled preserved szechuan pickle harvester is a harvester powered by a diesel engine, is suitable for plains and hilly areas, further enriches the variety of the preserved szechuan pickle harvester, has the remarkable advantages of small size, root cutting, impurity removal and the like, and can liberate a large amount of labor force. The planting area in hilly areas is large, the terrain is uneven, a large-scale preserved szechuan pickle harvester cannot enter the working use, and the harvester can walk on the similar soil of the piece.

This preserved szechuan pickle harvester has carried out bold innovation, for preventing the not enough problem of centre gripping conveyor belt tensioning, has increased supplementary strutting arrangement to innovate the centre gripping area, increased column centre gripping rubber, can carry out centre gripping and transport to the stem leaf better. The screw feeder in the impurity removing device designs 3 screw feeders to work simultaneously by referring to the actual impurity removing effect on the large plain preserved szechuan pickle harvester, and enables preserved szechuan pickle axial movement to be collected in the collection device. The shell and the leaf crushing hob in the leaf crushing device are the design scheme which is selected to be optimal in transmission and most convenient for leaf discharging after a plurality of schemes are eliminated. According to and by reference to practical test data of the small harvester of the predecessor, the optimal ground clearance and the reasonable clamping height of the rack are designed. According to the actual clamping characteristic, the tip of the middle leaf supporting device is 100mm. According to the learned knowledge, the centering type crank slider mechanism is provided with a root cutting device formed by the most similar fixed cutters and movable cutters. According to the high plant ratio of the preserved szechuan pickle, a flying arch with the vertical height of more than 800mm is designed, and the flying arch can also play a role in fixing the leaf supporting device.

The development time of the mustard tuber harvester in China is short, corresponding machines are available in plain areas, but the small hilly areas are still seriously lack of machines. A leaf supporting device, a clamping and conveying device and two rear wheel drives are arranged at the place similar to the domestic small self-propelled preserved szechuan pickle harvester. Different places have the angle of the clamping and conveying device raised to the highest in order to install devices for removing impurities and the like; in order to reduce the pulling-off of the preserved szechuan pickle leaves, a root cutting device is particularly and innovatively arranged; in order to remove the residual leaves and roots on the preserved szechuan pickle, an impurity removing device is additionally arranged below a conveying belt and is additionally provided with a leaf and fruit separating knife; in order to prevent the chopped leaves from being scattered everywhere, a leaf chopping device is added, and the chopped leaves can be returned to the field under a rack in order; the power of diesel engine commonly used by agricultural machinery is adopted, and the power which people contact daily is used as much as possible under the condition of not influencing the harvesting effect.

Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.

In the present specification, the terms "upper", "lower", "left", "right", "middle", and the like are used for clarity of description, and are not intended to limit the scope of the present invention, and changes or modifications in the relative relationship may be made without substantial changes in the technical content.

Claims (10)

1. A self-propelled preserved szechuan pickle harvester is characterized by comprising a rack (1), a leaf supporting device, a root cutting device (7), a conveying device (5), a leaf and fruit separating knife (6), an impurity removing device, a collecting bin (19), a leaf crushing device (13), a gearbox (14), an engine (15), a front wheel (8) and a rear wheel (16);

the front end of the rack (1) is provided with the leaf supporting device, the rear side of the leaf supporting device is provided with the inclined conveying device (5), the middle of the lower inclined edge of the conveying device (5) is provided with the leaf and fruit separating knife (6), the impurity removing device is arranged right below the leaf and fruit separating knife (6), and the transverse end part of the impurity removing device is provided with the collecting bin (19);

the root cutting device (7) is arranged on the lower surface of the front end of the rack (1), and the root cutting device (7) is positioned behind and below the leaf supporting device;

the rear side of the top end of the conveying device (5) is provided with the vertically extending leaf crushing device (13);

cut root device (7) rear side frame (1) lower surface rotates and is provided with front wheel (8), the rear side lower surface of frame (1) rotates and is provided with rear wheel (16), the top of rear wheel (16) has set gradually from preceding backward gearbox (14) with engine (15), engine (15) do respectively rear wheel (16) cut root device (7) conveyor (5) the edulcoration device and garrulous leaf device (13) provide the power source.

2. The self-propelled preserved szechuan pickle harvester according to claim 1, wherein the leaf supporting device comprises a flying arch (4), a middle leaf supporting device (3) and two side leaf supporting devices (2), the flying arch (4) is installed on the frame (1), the middle leaf supporting device (3) is installed in the middle of the lower edge of the flying arch (4), the side leaf supporting devices (2) are respectively installed at two ends of the lower edge of the flying arch (4), the side leaf supporting devices (2) are further connected with the frame (1), the width of the side leaf supporting devices (2) is larger than that of the middle leaf supporting devices (3), the vertical distance of the gantry height of the flying arch (4) is larger than the height of a preserved szechuan pickle plant, and the front-back length of the middle leaf supporting device (3) and the two side leaf supporting devices (2) is larger than the plant spacing of the preserved szechuan pickle plant.

3. The self-propelled mustard harvester according to claim 2, characterized in that the root-cutting device (7) comprises a crank disk (28), a transmission connecting rod (29), a fixed knife (21) and a movable knife (22); the fixed knife (21) is fixedly arranged on the lower surface of the front end of the rack (1), the movable knife (22) capable of moving in a reciprocating mode is arranged below the fixed knife (21), a rotating shaft of the crank disk (28) is in transmission connection with the gearbox (14) through a transmission mechanism, the eccentric position of the crank disk (28) is hinged to one end of the transmission connecting rod (29), and the other end of the transmission connecting rod (29) is hinged to the end of the movable knife (22).

4. A self-propelled mustard harvester according to claim 3, characterized in that the conveyor device (5) comprises a carriage and two gripping and conveying assemblies; the conveying frame is obliquely arranged on the rack (1), the inclination angle of the conveying frame is less than or equal to 45 degrees, and the conveying frame is provided with two clamping conveying assemblies which are arranged side by side at the left and right;

the clamping and conveying assembly comprises a driving clamping belt wheel (23), a driven clamping belt wheel (24) and a clamping and conveying belt (20); the driving clamping belt wheel (23) is rotationally connected to the lower end of the conveying frame, the driven clamping belt wheel (24) is rotationally connected to the top end of the conveying frame, and the driving clamping belt wheel (23) is in transmission connection with the driven clamping belt wheel (24) through the clamping conveying belt (20);

the outer surface hoop of centre gripping conveyer belt (20) is provided with a plurality of cylindricality centre gripping archs side by side, the protruding rubber material integrated into one piece structure that is of cylindricality centre gripping, the bellied surface of cylindricality centre gripping is the cylinder curved surface.

5. The self-propelled preserved szechuan pickle harvester according to claim 4, wherein the impurity removing device comprises an impurity removing shell (9), a front impurity removing auger (10), a middle impurity removing auger (11) and a rear impurity removing auger (12), the lower end of the impurity removing shell (9) is mounted on the frame (1), and the front impurity removing auger (10), the middle impurity removing auger (11) and the rear impurity removing auger (12) which rotate in the same direction are sequentially arranged in the middle of the impurity removing shell (9) from front to back; the front impurity removal auger (10), the middle impurity removal auger (11) and the rear impurity removal auger (12) are all spiral conveying augers; the middle impurity removal auger (11) is positioned at the lower part of a connecting line of the front impurity removal auger (10) and the rear impurity removal auger (12), the screw pitches of the front impurity removal auger (10) and the rear impurity removal auger (12) are equal, and the screw pitches of the front impurity removal auger and the rear impurity removal auger (12) are different from the screw pitch of the middle impurity removal auger (11); the front impurity removing auger (10), the middle impurity removing auger (11) and the rear impurity removing auger (12) have the same rotating direction.

6. The self-propelled preserved szechuan pickle harvester according to claim 5, wherein the leaf crushing device (13) comprises a reducing section (25), a constant diameter section (27) and a leaf crushing hob assembly (26), the lower end of the constant diameter section (27) is mounted on the frame (1), the upper end of the constant diameter section (27) is mounted with the reducing section (25) which is gradually reduced from top to bottom, the leaf crushing hob assembly (26) is arranged inside the upper end of the constant diameter section (27), and the hobs of the leaf crushing hob assembly (26) are spirally distributed; the upper end of the reducing section (25) is positioned obliquely behind the top end of the conveying device (5).

7. The self-propelled preserved szechuan pickle harvester according to claim 1, further comprising a steering support (18), wherein the steering support (18) is arranged at the upper rear end of the frame (1).

8. The self-propelled preserved szechuan pickle harvester of claim 7, further comprising a steering wheel (17), wherein the steering wheel (17) is arranged in front of and above the driving support (18).

9. The self-propelled preserved szechuan pickle harvester of claim 8, further comprising a clutch assembly (31), wherein the engine (15) and the gearbox (14) are in transmission connection through the clutch assembly (31).

10. The self-propelled mustard tuber harvester according to claim 1, characterized in that the front wheel (8) is a plurality of wheels, the front wheels (8) are equally spaced on the lower front surface of the frame (1), and the diameter of the front wheels (8) is smaller than that of the rear wheels (16).

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