阅读说明：本技术 一种小型电动马铃薯收获机及收获装置 (Small-size electronic potato harvester and harvesting apparatus ) 是由 朱振霖 于 2021-08-31 设计创作，主要内容包括：本发明公开了一种小型电动马铃薯收获机及收获装置,该收获机包括机车和设置在机车前端的收获装置,收获装置包括：收获斗、筛选机构、挖铲机构、以及支撑机构；筛选机构安装在收获斗中；支撑机构位于挖铲机构的前方。本发明的机车采用履带电动底盘,并且采用收获装置在前,机车在后的布局,让地里的作物先被收获装置铲出归拢到中间,机车行走在保证不压到已经铲出的作物的情况下,在后面不断推动前面的收获装置作业,极大的优化了传统机械的布局和传动方式,所需的动力大大减小,整机更加紧凑,而且提高了传动系统的可靠性有利于整体小型化,操作简单化,可使用丘陵、山地等小地块作业。(The invention discloses a small-sized electric potato harvester and a harvesting device, wherein the harvester comprises a locomotive and a harvesting device arranged at the front end of the locomotive, and the harvesting device comprises: the device comprises a harvesting hopper, a screening mechanism, a digging shovel mechanism and a supporting mechanism; the screening mechanism is arranged in the harvesting hopper; the support mechanism is located in front of the shovel mechanism. The locomotive of the invention adopts the crawler electric chassis, adopts the arrangement that the harvesting device is arranged in front of the locomotive and the locomotive is arranged behind the locomotive, so that the crops in the ground are firstly shoveled out by the harvesting device and gathered in the middle of the harvester, and the locomotive continuously pushes the harvesting device in front of the locomotive to operate behind the locomotive under the condition of ensuring that the shoveled crops are not pressed, thereby greatly optimizing the arrangement and transmission mode of the traditional machinery, greatly reducing the required power, leading the whole locomotive to be more compact, improving the reliability of a transmission system, being beneficial to the whole miniaturization, simplifying the operation and being capable of operating in small plots such as hills, mountains and the like.)

1. The utility model provides a harvesting apparatus of small-size electronic potato harvester which characterized in that: the harvesting device (10) comprises: the device comprises a harvesting bucket (2), a screening mechanism (3), a digging shovel mechanism (4) and a supporting mechanism (5);

the screening mechanism (3) is arranged in the harvesting hopper (2), and the screening mechanism (3) comprises a conveyor belt (32) consisting of a plurality of screen rods (320) with gaps;

digging shovel mechanism (4) install at results fill (2) front end, it includes: the device comprises a digging shovel (41), a digging shovel column (42) and an eccentric driving mechanism (43), wherein the digging shovel (41) is arranged at the lower end of the digging shovel column (42), the digging shovel (41) is backwards connected with a conveyor belt (32) in the screening mechanism (3) in a bearing mode, and the digging shovel column (42) is linked with the eccentric driving mechanism (43);

the supporting mechanism (5) is positioned in front of the digging shovel mechanism (4), and the supporting mechanism (5) comprises: a support column (51) and a roller (52) installed below the support column (51).

2. The harvesting mechanism of a small electric potato harvester according to claim 1, characterized in that: the conveyor belt (32) is driven by a chain mechanism (31) or a belt mechanism, and the chain mechanism (31) or the belt mechanism is driven by a first motor (311).

3. The harvesting mechanism of a small electric potato harvester according to claim 1, characterized in that: the eccentric drive mechanism (43) comprises: the shovel comprises a second motor (431), a rotating shaft (432) driven to rotate by the second motor (431), and an eccentric mechanism (433) arranged between the rotating shaft (432) and the shovel column (42), wherein when the rotating shaft is driven to rotate by the second motor (431), the shovel column (42) is driven to move by the eccentric mechanism (433).

4. A harvesting mechanism for a small electric potato harvester according to claim 3, characterized in that: the digging shovel mechanism (4) is provided with two digging shovel columns (42), and the digging shovel (41) is fixed between the two digging shovel columns (42); the rotating shaft (431) is connected between the two digging shovel columns (42).

5. A harvesting mechanism of a small electric potato harvester according to claim 4, characterized in that: the front end of the harvesting hopper (2) is provided with a connecting plate (22); the rotating shaft (431) penetrates through the connecting plate (22) to connect the two digging shovel columns (42) with the harvesting bucket (2).

6. A harvesting mechanism of a small electric potato harvester according to claim 4, characterized in that: a slipknot connecting rod (44) is arranged between the digging shovel column (42) and the harvesting bucket (2).

7. A harvesting mechanism for a small electric potato harvester according to claim 3, characterized in that: the supporting mechanism (5) is arranged at the front end of the harvesting hopper (2), and the supporting mechanism (5) is connected with the harvesting hopper (2) in a non-rigid mode.

8. A small electric potato harvester employing a harvesting device (10) according to any one of claims 1-7, characterized in that: the harvester include: the harvester is characterized by comprising a locomotive (1) driven by an electric crawler and a harvesting device (10) arranged on the locomotive (1), wherein the harvesting hopper (2) is movably connected with the locomotive (1) and drives the harvesting hopper (2) to rotate through a pneumatic piston rod (21).

9. A miniature electric potato harvester according to claim 8, wherein: the harvester is characterized in that a support (11) is installed on the locomotive (1), the rear end of the harvesting hopper (2) is pivoted to the lower end of the support (11), a traction mechanism is connected between the front end of the harvesting hopper (2) and the upper end of the support (11), and the whole harvesting hopper (2) is driven to rotate through the traction mechanism.

10. A miniature electric potato harvester according to claim 8, wherein: the locomotive (1) is provided with a battery (12), the battery (12) is used for driving a self crawler belt and is not supplied with power by a harvesting device; the traction mechanism is as follows: any one of a pneumatic piston rod (21), a hydraulic piston rod, a chain mechanism and a steel wire winding mechanism.

The technical field is as follows:

the invention relates to the technical field of agricultural machinery, in particular to a small electric potato harvester and a harvesting device which can be used for harvesting underground blocky crops such as potatoes, sweet potatoes and the like.

Background art:

because the potato planting environment requirement is low, the yield is high, and the starch content is high, the potato is always an important grain crop in China. In addition, as the population base of China is large and the practical cultivated land use area is less and less, the potato planting technology is further enhanced and improved, the development of the potato planting industry is greatly promoted, and the method plays an extremely important role in fundamentally solving the problem of food production in China and effectively promoting the modern agricultural production in China.

The potato planting in China is mainly carried out in 22 provinces or regions, wherein the potato planting is mainly distributed in inner Mongolia, Guizhou, Gansu, Heilongjiang, Shaanxi and other provinces, and in the planting regions, besides the mechanical scale planting of a few large-scale planting regions, a plurality of planting regions are still mainly subjected to small-scale semi-mechanical or even artificial planting. One important reason for this is that many planting areas are located in some mountainous or hilly areas. For such small-area planted potatoes, it is difficult for many existing potato harvesting machines to develop the strength needed in these areas. In addition, the existing potato harvester is basically designed for large-scale machines developed and produced for planting in large-area plain lands. For the existing potato planting fields with small planting areas in mountainous areas and hilly lands, the traditional potato harvester cannot be put into use at all.

Through the search of the current Chinese patent database, the current potato harvester does not have related products which are specially developed aiming at mountainous areas and hilly lands. Examples are as follows:

comparative patent 1:

the patent name: potato soil removal harvesting assembly

The patent applicant: shanghai Securinega Kogaku agriculture science and technology development Co., Ltd

The patent publication date is: 2021, 5 months and 11 days

The key point of the technical scheme is that the potato harvester comprises a frame, wherein a leaf removing device for removing the stems and leaves of the potatoes is arranged at the front end of the frame; an excavating device for excavating the potatoes and removing soil is arranged below the frame and positioned behind the leaf removing device, and the excavating device comprises an inclined soil shoveling component capable of moving in the vertical direction so as to loosen soil at different depths and a rotary excavating component which is abutted against the soil through a rotary disc component so as to throw the potatoes out of the soil through centrifugal force; the frame has the cleaning device who carries the potato and carry out the secondary simultaneously and take off soil behind, and cleaning device includes the subassembly that takes off soil that carries and offset and then take off soil to its secondary through fixed brush part and the potato that moves through the transmission of conveyer belt part and then drive the potato removal, and the technological effect is with the potato results and carry out the advantage that the secondary takes off soil.

The comparison patent 2:

the patent name: potato harvesting and screening all-in-one machine

The patent applicant: dry crop agricultural research institute of academy of agriculture and forestry of Hebei province

The patent publication date is: year 2020, 4 and 17

This patent is a potato results screening all-in-one. The main technical characteristics are as follows: including the frame that has tractor, walking wheel, the frame front end is provided with the dozer blade, and the dozer blade rear end is provided with movable conveying board, and the front portion of frame is provided with the conveyer belt that has the conveying pole, and the high setting in low back before the conveyer belt, conveyer belt front end and dozer blade phase-match are provided with fan type vibration roller with conveyer belt middle part position phase-match department, the rear portion of frame is provided with the screening chain, is provided with a plurality of screening poles on the screening chain, and the high setting in low back before the screening chain, screening chain front end and conveyer belt rear end match, are provided with the little potato shifting plate of below slope to the right below the screening chain left side, and the screening chain rear side is provided with the big potato shift fork of below slope to the left. According to the potato harvesting and screening all-in-one machine provided by the invention, when the potatoes are received, the small potatoes and the large potatoes are respectively in line, so that the integration of potato harvesting and screening is realized.

Comparison patent 3:

the patent name: potato harvester

The patent applicant: hangzhou Heyu gardening Co Ltd

The patent publication date is: year 2020, 1 month and 14 days

The patent provides a potato harvester, which comprises a rack with an air guide opening, wherein a fan device is arranged on one side of the rack, an earth cleaning device is connected onto the fan device, a screening device is arranged at the front end of the earth cleaning device, a material receiving device is arranged below the screening device, a wheel device is arranged below the material receiving device, and one side of the wheel device is connected with the earth cleaning device; according to the potato harvester provided by the invention, simple soil cleaning devices, screening devices and fan devices are matched with one another, potatoes are screened according to sizes, and partial foreign matters in the potatoes are blown away.

Through research and analysis on the potato harvester technology, the current similar products and technology have the following defects.

(1) At present, the potato harvester of the same kind does not have an independent traction driving device, and still needs to be dragged by a traditional tractor and other traction driving devices, so that the potato harvester cannot independently walk.

At present, the similar potato harvester improves the operation mechanism in the harvester and does not relate to a traction driving device. In the product technology, the tractor needs not to be connected with other traction mechanisms (such as agricultural tractors) in a towing mode and then used, and the tractor needs not to be integrated on other combine harvesters and motor vehicles. These product technologies are not at all applicable to mountainous and hilly planting terrain. Since these planting zones do not lend themselves to large tractors such as tractors. If the product technology is used, the use cost of the product technology is not borne by planting farmers at all.

(2) At present, a traction driving device used by a potato harvester still adopts a fuel engine, and generally adopts a diesel internal combustion engine, so that the energy consumption is high and the cost is high.

The traction driving device used by the existing potato harvester usually adopts a diesel internal combustion engine, the energy consumption of the equipment is large, the corresponding cost is high, and particularly, the power consumption of the equipment is further increased in the operation of mountainous and hilly areas, so that the use cost is increased. The average yield per mu of the potatoes is 1000-2000 kg, the economic value is not too high, and if a traditional harvester is adopted, the planting income of farmers is greatly reduced, and the enthusiasm of the farmers for using the harvester is greatly limited.

(3) The harvesting mechanism that adopts in present potato harvester has adopted the big shovel head of hard drawing, so required power is very big, has caused many not necessary wastes to hilly area geology is greatly different with plain, and the big shovel head of width causes the damage of potato very easily because of the powerful power, produces unnecessary loss. Meanwhile, the soil screening and sorting structure of the existing potato harvester is a linkage mechanism. The device has overhigh running speed in the screening process, so that the potatoes are influenced by external force to be unnecessarily damaged in the screening process, and the loss of the cultivators is increased.

In view of the above problems, the present inventors have proposed the following.

The invention content is as follows:

the invention aims to overcome the defects of the prior art and provide a harvesting device of a small electric potato harvester.

In order to solve the technical problems, the invention adopts the following technical scheme: a harvesting apparatus for a small electric potato harvester, said harvesting apparatus comprising: the device comprises a harvesting hopper, a screening mechanism, a digging shovel mechanism and a supporting mechanism; the screening mechanism is arranged in the harvesting hopper and comprises a conveyor belt consisting of a plurality of screen rods with gaps; the shovel mechanism install at the results fill front end, it includes: the digging shovel is arranged at the lower end of the digging shovel column, the digging shovel is backwards connected with a conveyor belt in the screening mechanism, and the digging shovel column is linked with the eccentric driving mechanism; the supporting mechanism is located the place ahead of digging shovel mechanism, this supporting mechanism includes: the support column and install the gyro wheel below the support column.

Further, in the above technical solution, the conveyor belt is driven by a chain mechanism or a belt mechanism, and the chain mechanism or the belt mechanism is driven by the first motor.

Further, in the above-described aspect, the eccentric drive mechanism includes: the second motor, through rotatory pivot of second motor drive, set up the eccentric mechanism between pivot and shovel post, when the pivot passes through the second motor drive pivoted, drive through eccentric mechanism and dig the motion of shovel post.

Further, in the above technical solution, the shovel mechanism has two shovel posts, and the shovel is fixed between the two shovel posts; the two digging shovel columns are connected through a rotating shaft.

Furthermore, in the above technical scheme, the front end of the harvesting hopper is provided with a connecting plate; the rotating shaft penetrates through the connecting plate, so that the two digging shovel columns are connected with the harvesting hopper.

Furthermore, in the above technical scheme, a slipknot connecting rod is arranged between the digging shovel column and the harvesting bucket.

Furthermore, in the above technical solution, the support mechanism is installed at the front end of the harvesting hopper, and the support mechanism and the harvesting hopper are connected in a non-rigid manner.

The second technical problem to be solved by the invention is to overcome the defects of the prior art and provide a small-sized electric potato harvester which can be used in mountainous and hilly areas.

In order to solve the second technical problem, the invention adopts the following technical scheme: a miniature electric potato harvester employing the harvesting apparatus as described above, the harvester comprising: the harvester is characterized by comprising a locomotive driven by an electric crawler and a harvesting device arranged on the locomotive, wherein the harvesting hopper is movably connected with the locomotive and is driven to rotate by a pneumatic piston rod.

Furthermore, in the above technical scheme, the locomotive is provided with a support, the rear end of the harvesting hopper is pivoted at the lower end of the support, and a traction mechanism is connected between the front end of the harvesting hopper and the upper end of the support and drives the whole harvesting hopper to rotate through the traction mechanism.

Furthermore, in the technical scheme, the locomotive is provided with a battery, the battery is used for driving the self crawler belt, and the power is not supplied to the harvesting device; the traction mechanism is as follows: any one of a pneumatic piston rod, a hydraulic piston rod, a chain mechanism and a steel wire winding mechanism.

After adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects:

1. the invention does not use a high-horsepower diesel engine as power, uses a crawler electric chassis instead, adopts the layout that the harvesting device is arranged in front of the locomotive and the locomotive is arranged behind the harvesting device, so that the crops in the ground are firstly shoveled by the harvesting device and gathered in the middle of the harvesting device, and the locomotive continuously pushes the harvesting device in front of the locomotive to operate behind the locomotive under the condition of ensuring that the shoveled crops are not pressed, thereby greatly optimizing the layout and transmission mode of the traditional machinery, greatly reducing the required power, leading the whole machine to be more compact, improving the reliability of a transmission system, being beneficial to the whole miniaturization and simplifying the operation.

2. The direct-current brushless motor is used as power for driving the locomotive to walk, and the direct-current brushless motor is originally designed for energy conservation, emission reduction and miniaturization so as to be suitable for small-plot operation, so that the power of a traditional internal combustion engine is not used as main power. The electric motor is more compact in volume than the internal combustion engine, and the most advantage is small volume and light weight. And the motor does not have an intake and exhaust system and a heat dissipation system as complicated as those of the internal combustion engine. The small-sized mechanical layout is very beneficial, the motor has no complicated transmission mechanism in structure, and the number of wearing parts is small, so that the small-sized mechanical layout is very consistent with the requirement of agricultural implements on reliability.

3. The existing harvester adopts a high-horsepower diesel engine or a gasoline engine and the like to provide power uniformly, then the power is transmitted step by a transmission system and finally reaches working parts of a digging shovel, a screen and the like of the harvester, so that the running speed of the harvester can change along with the change of the rotating speed of an engine and cannot be independently and randomly adjusted. The operator will use a high rotational speed to obtain more power. However, with the increase of the rotating speed of the engine, the rotating speed of the harvester part also increases, so that the running speed of working parts such as a screen is too high to cause great damage to received crops, and the damage rate is high because the rotating speed is too high in the running process of the screen, so that potatoes are easily extruded and damaged by strong external force in a soil screen, peels and the like. These damaged potatoes and other crops cannot be sold at a good price, and the storage time is greatly shortened. The invention changes the power, layout and transmission of the traditional agricultural machinery. The electric power system is used on agricultural machinery, and a high-horsepower diesel engine is not used for providing power in a unified way. The power is separately distributed, the chassis of the locomotive adopts independent power, the harvesting device also adopts independent power, the traditional complex power transmission system is replaced by a wire, the distribution is simple and the reliability is extremely high, and most importantly, the power loss of the transmission system is almost ignored. The working part of the whole machine can realize independent operation and random speed regulation regardless of a locomotive or a harvesting mechanism. The screening mechanism and the digging shovel mechanism are no longer related to the advancing speed of the locomotive, so that the potatoes are separated from the soil at a reasonable speed, the potatoes are protected, and the breakage rate and waste of the potatoes are reduced.

The invention can be used for harvesting potatoes and can also be used for underground blocky crops such as sweet potatoes.

Description of the drawings:

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a perspective view of the harvesting hopper section of the present invention.

The specific implementation mode is as follows:

the invention is further illustrated below with reference to specific embodiments and the accompanying drawings.

As shown in fig. 1 and 2, the invention is a small electric potato harvester, which comprises: a locomotive 1 and a harvesting device 10 mounted at the front end of the locomotive 1.

The locomotive 1 is driven by an electric crawler belt and comprises: a track chassis 16, and a bracket 11, a battery 12, a primary drive mechanism 13, a console 14, and a seat 15 mounted above the track chassis. The battery 12 supplies power to the main driving mechanism 13, and the main driving mechanism 13 drives the crawler chassis 16 to move. The main driving mechanism 13 adopts a brushless DC motor, and an output shaft of the brushless DC motor drives the crawler chassis 15 to run through a gear or a belt. The batteries 12 are lithium batteries and the batteries 12 and the main drive mechanism 13 are located behind the crawler chassis 16, which can have a counterweight effect to balance the entire harvester.

The harvesting device 10 comprises: harvesting bucket 2, screening mechanism 3, shovel mechanism 4, and supporting mechanism 5.

The harvesting hopper 2 is in a hollow bottomless hopper shape, the harvesting hopper 2 is positioned at the front end of the locomotive 1, and the harvesting hopper and the locomotive are movably connected, specifically: the rear end of the harvesting hopper 2 is pivoted at the lower end of the bracket 11, a traction mechanism is connected between the front end of the harvesting hopper 2 and the upper end of the bracket 11, and the whole harvesting hopper 2 is driven to rotate by driving the traction mechanism.

As shown in fig. 1, the traction mechanism in this embodiment employs a pneumatic piston rod 21, and when the pneumatic piston rod 21 contracts, the harvesting hopper 2 is driven to rotate clockwise, so that the whole harvesting device 10 leaves the ground; when the pneumatic piston rod 21 is extended, the harvesting hopper 2 rotates counterclockwise, so that the whole harvesting device 10 is close to the ground, and the operation is convenient. The pneumatic piston rod 21 is mainly used for pulling the harvesting hopper to rotate and generating a pulling force to the harvesting hopper 2 when in work. Therefore, the traction mechanism can also adopt any one of a hydraulic piston rod, a chain mechanism and a steel wire winding mechanism.

Referring to fig. 2, the screening mechanism 3 is installed in the harvesting hopper 2, the screening mechanism 3 is formed by a conveyor belt 32 driven by a chain mechanism 31, wherein the conveyor belt 32 is formed by a plurality of screen rods 320 with gaps, the distance between the screen rods 320 is smaller than the distance between the potatoes, and the distance is generally 4-10 cm.

The chain mechanism 31 in the screening mechanism 3 is driven by the first motor 311, and the first motor 311 can directly drive the driving sprocket of the chain mechanism 31, or can drive the driving sprocket of the chain mechanism through a belt, a chain, or a gear transmission mechanism. The first motor 311 is directly fixed on the harvesting hopper 2. When the chain mechanism 31 starts to operate, the conveyor belt 32 constituted by the sieve bars 320 runs in the clockwise direction, so that the soil blocks with potatoes therein dug up by the shovel mechanism 4 in front are conveyed backward, and then the rear end of the conveyor belt 32 falls.

The shovel mechanism 4 install at the harvest fill 2 front end, it includes: a digging shovel 41, a digging shovel column 42 and an eccentric driving mechanism 43, wherein the digging shovel 41 is arranged at the lower end of the digging shovel column 42, the front end of the digging shovel 41 is declined, and the rear end thereof is backwards connected with the conveyor belt 32 in the screening mechanism 3. The shovel post 42 is linked with an eccentric drive mechanism 43.

The digging shovel mechanism 4 is provided with two digging shovel columns 42, and the digging shovel 41 is fixed between the two digging shovel columns 42; the two shovel posts 42 are connected by a shaft 432. The front end of the harvesting hopper 2 is provided with a connecting plate 22; the shaft 431 passes through the connecting plate 22 to connect the two shovel posts 42 to the harvesting hopper 2.

The eccentric drive mechanism 43 includes: the excavator comprises a second motor 431, a rotating shaft 432 driven to rotate by the second motor 431, and an eccentric mechanism 433 arranged between the rotating shaft 432 and the excavating shovel column 42, wherein when the rotating shaft is driven to rotate by the second motor 431, the excavating shovel column 42 is driven to move by the eccentric mechanism 433. The eccentric mechanism 433 has the following specific structure: a shaft sleeve is arranged above the digging shovel column 42, an eccentric wheel is fixed at two ends of the rotating shaft 432, and a bearing is arranged between the eccentric wheel and the shaft sleeve. When the rotating shaft 432 is driven by the second motor 431 to start to operate, the shovel post 42 is driven by the operation of the eccentric wheel to move up and down.

In addition, a slipknot connecting rod 44 is arranged between the digging column 42 and the harvesting bucket 2. When the digging shovel column 42 moves up and down under the driving of the eccentric wheel by the digging shovel column 42, the digging shovel column 42 simultaneously swings back and forth under the up and down movement due to the loose joint connecting rod 44, so that the digging shovel 41 positioned under the digging shovel column 42 forms a reciprocating up and down and swinging compound movement. Such a design has the following advantages: the front end of the shovel is usually inclined downwardly in order to provide a downward digging effect to the shovel, and this design has the disadvantageous effect that if the shovel remains relatively stationary during operation, the resulting digging force will cause the shovel to incline uniformly downwardly, which will result in greater and greater resistance as the shovel digs deeper and deeper, until the entire harvester is difficult to continue to propel. With the adoption of the structure, the invention not only can enable the digging shovel 41 to form a similar digging effect, but also can prevent the digging shovel 41 from continuously digging downwards and from digging deeper and deeper.

The supporting mechanism 5 is located in front of the shovel mechanism 4, and the supporting mechanism 5 comprises: a support column 51 and a roller 52 installed below the support column 51. As previously mentioned, in order to prevent the digging blade 41 from digging deeper and deeper, the digging blade 41 must be maintained at an appropriate height, and the present invention can provide a supporting function for the digging blade 41 and the entire harvesting bucket 2 by the supporting mechanism 5.

The front end of the harvesting hopper 2 is provided with a connecting plate 22, and the supporting mechanism 5 is movably connected with the harvesting hopper 2 through the connecting plate 22. The whole supporting mechanism 5 consists of two supporting columns 51, and the two supporting columns 51 can be fixedly connected through a connecting plate or a connecting rod. The whole supporting mechanism 5 is connected with the harvesting bucket 2 in a non-rigid manner, as shown in fig. 1, the supporting mechanism 5 is pivoted with the harvesting bucket 2 with a swing amplitude, that is, the supporting mechanism 5 can swing within a certain range. Alternatively, an elastic damper mechanism is provided on the support column 51 in the support mechanism 5. Either way, the roller 52 can adapt to depressions in the ground surface by a limited oscillation or resilient damping mechanism, while avoiding the roller 52 from sinking into soft ground under the action of the rear pushing force.

In addition, in order to adapt to different digging depths, a telescopic adjusting structure is adopted between the roller 52 and the supporting column 51 in the supporting mechanism 5; or the supporting mechanism 5 and the harvesting hopper 2 are fixedly connected by adopting the adjustable height. In the present embodiment, as shown in fig. 1, the height of the entire support column 5 can be adjusted by adjusting the downward extending length of the roller 42 by adjusting the handle. When the excavation depth is deep, the roller 42 can be adjusted upward so that the shovel 41 can be more extended into the ground, and conversely, the roller 42 can be adjusted downward.

The first motor 311 and the second motor 431 are both powered by the battery 12 through a cable. Of course, the first motor and the second motor may be combined to use one motor, and then the chain mechanism in the screening mechanism 3 and the eccentric driving mechanism 43 in the shovel mechanism 4 are driven by one transmission mechanism respectively.

In use of the invention, the pneumatic piston rod 21 is actuated to extend, causing the harvest bucket 2 to rotate counterclockwise, thereby bringing the entire harvesting apparatus 10 closer to the ground, while the shovel 41 extends into the ground. Then the truck 1 is moved forward, the digging shovel 41 extends into the bottom surface to turn the soil open along with the movement of the truck 1, and the turned soil blocks and the potatoes buried in the soil blocks are fed backward onto the conveyor belt 32 of the screening mechanism 3 along with the digging shovel. Because conveyer belt 32 has a plurality of sieve bars 320 that have gapped to constitute, so earth will drop through the clearance between the sieve bar 320, and great clod and potato will be followed conveyer belt 32 and moved backward, and the rear end that has conveyer belt 32 falls, and the potato just directly falls on the ground surface this moment, and it can to pick up by operating personnel again.

It should be understood that the above description is only exemplary of the present invention, and is not intended to limit the scope of the present invention, which is defined by the appended claims.