Combined potato harvesting machine

Abstract

The utility model discloses a potato combined harvester which comprises a rack, a digging mechanism, a conveying and screening mechanism, a bagging mechanism and a transmission mechanism, and the digging mechanism comprises a digging shovel; the conveying and screening mechanism comprises a bottom-layer conveying chain, a square ring lifting conveying chain, a third conveying chain and a fourth conveying chain, the impurity removing mechanism is arranged at the rear part of the bottom-layer conveying chain, the bagging mechanism is arranged at the rear part of the fourth conveying chain, and the transmission mechanism comprises a mechanical transmission mechanism and a hydraulic transmission mechanism; first platforms are arranged on the front and right sides of the third conveying chain, a second platform is arranged on the left side of the front of the fourth conveying chain, and a third platform and a fourth platform are arranged on the left and right sides of the rear of the fourth conveying chain respectively. The structure is reasonable, the impurity removal effect is good, potatoes are directly loaded into ton bags, and the working efficiency is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of agricultural machinery, in particular to a potato combined harvester. Background Art

[0002] Most existing potato harvesters dig up potatoes and lay them out in strips behind the equipment, which are then picked up manually. This mode has low harvesting efficiency and high labor costs. Some potato combine harvesters first transport the potatoes longitudinally and then transport them laterally to a hopper truck traveling sideways. This type of harvester saves labor and improves work efficiency. However, this harvesting mode has the following problems that are difficult to solve: (1) Soil and stones that are similar in shape to potatoes cannot be separated; (2) During the transportation of potatoes, ground film and vines are difficult to separate and are easily transported with the potatoes and easily entangled in the conveyor chain; (3) When potatoes fall into the hopper truck, they may cause internal injuries due to collision; (4) Before potatoes are put into storage, they need to be manually sorted, cleaned and bagged, which consumes a lot of manpower and material resources and invisibly increases costs. Utility Model Content

[0003] The utility model aims to overcome the problems existing in the prior art and provides a potato combined lifting and harvesting machine, which has reasonable structure, good impurity removal effect, can directly load potatoes into ton bags, and has high working efficiency.

[0004] The purpose of the utility model is achieved as follows: a potato combined harvester, which includes a frame, a digging mechanism, a conveying and screening mechanism, a bagging mechanism and a transmission mechanism, a traction mechanism is provided at the front of the frame, and walking wheels are provided on the left and right sides of the middle and rear parts of the frame; the digging mechanism includes a digging shovel arranged at the front of the frame; the conveying and screening mechanism includes a bottom conveying chain, a square ring lifting conveying chain, a third conveying chain and a fourth conveying chain, a bottom conveying chain for conveying and screening potatoes backwards is arranged at the front lower part of the frame, a de-mixing mechanism is arranged at the rear of the bottom conveying chain, and a square ring lifting conveying chain for lifting potatoes is arranged laterally at the rear of the de-mixing mechanism A conveying chain is provided, a third conveying chain for conveying potatoes forward is provided on the right side of the upper part of the frame, a fourth conveying chain for conveying potatoes backward is provided in the middle of the upper part of the frame, and a guide groove is provided between the front ends of the third conveying chain and the fourth conveying chain; the bagging mechanism is provided at the rear of the fourth conveying chain; the transmission mechanism includes a first gear box connected to the rear power output shaft of the tractor, and the first gear box drives and connects the mechanical transmission mechanism and the hydraulic transmission mechanism; a first platform is provided at the front and right side of the third conveying chain, a second platform is provided at the left side of the front of the fourth conveying chain, and a third platform and a fourth platform are provided at the left and right sides of the rear of the fourth conveying chain respectively.

[0005] Preferably, the bottom conveyor chain comprises a first conveyor chain and a second conveyor chain connected end to end, and the debris removal mechanism is arranged at the rear of the second conveyor chain.

[0006] Preferably, the mechanical transmission mechanism includes a second gear box and a third gear box, the first gear box is connected to the second gear box through a first transmission shaft, the second gear box is connected to the third gear box through a chain transmission mechanism, the second gear box is driven to connect the second conveying chain and the first conveying chain through the chain transmission mechanism, the third gear box is driven to connect the de-dusting mechanism through a second transmission shaft, a belt or a chain transmission mechanism, and the third gear box is driven to connect the square ring lifting conveyor chain through the chain transmission mechanism; the hydraulic transmission mechanism includes an oil tank, an oil pump, a distributor, a first hydraulic motor driving the third conveying chain, and a second hydraulic motor driving the fourth conveying chain.

[0007] Preferably, the de-impurity mechanism includes roller arms hinged on the left and right sides of the rear frame of the second conveyor chain, a de-impurity roller is connected between the lower ends of the two roller arms, the middle parts of the two roller arms are connected to press the de-impurity roller against a pulling roller spring at the rear end of the second conveyor chain, and a de-impurity scraper is provided on the lower side of the de-impurity roller; the second transmission shaft drives the de-impurity roller to rotate through a belt or chain transmission mechanism.

[0008] Preferably, the traction mechanism includes a front crossbeam and a rear crossbeam, the front crossbeam is hinged to the traction frame, the rear of the traction frame is connected to two left-right symmetrical front hydraulic claws, the rear crossbeam is fixedly connected to two rear hydraulic claws corresponding to the front hydraulic claws, and the corresponding front hydraulic claws and rear hydraulic claws are connected to an adjusting cylinder driven by a hydraulic transmission mechanism.

[0009] Preferably, the excavation mechanism also includes a cutting assembly arranged on both sides of the excavation shovel, the cutting assembly includes a vertical disc arm, a horizontal disc arm and an elastic support rod, the cutting disc is installed in the middle of the horizontal disc arm through a disc shaft, the front end of the horizontal disc arm is hinged to the vertical disc arm, the upper end of the vertical disc arm is connected to the front cross beam, the rear end of the horizontal disc arm is hinged to the elastic support rod, and the upper end of the elastic support rod is connected to a support rod seat arranged on the rear side of the front cross beam.

[0010] Preferably, the bagging mechanism includes two vertical rails symmetrically arranged on the rear frame of the fourth conveyor chain, front slide grooves and rear slide grooves are provided on the inner sides of the two vertical rails, and the lower part of the rear slide groove is widened to a right-angle trapezoidal groove backward; a liftable front vertical frame is installed in the two front slide grooves through rollers, and a liftable rear vertical frame is installed in the two rear slide grooves through rollers, the lower ends of the front vertical frame and the rear vertical frame are hinged together, and the rear lower part of the rear vertical frame is connected to the ton bag pallet, and two lifting cylinders vertically installed on the frame are provided at the front part of the front vertical frame, and the lifting cylinders drive the front vertical frame, the rear vertical frame and the ton bag pallet to rise and fall synchronously; four ton bag hooks are provided on the frame above the ton bag pallet.

[0011] Preferably, a fixed pulley is arranged at the upper end of the piston rod of the lifting cylinder, and a lifting chain is supported and connected to the fixed pulley. One end of the lifting chain is connected to the cylinder body of the lifting cylinder, and the other end of the lifting chain is connected to the front vertical frame.

[0012] Preferably, the square ring lifting conveyor chain comprises a chain-rod mesh belt; the chain-rod mesh belt comprises side chain I and side chain II, chain rods and potato supporting buckets are connected at equal intervals between side chain I and side chain II, shift rods are provided at both ends of the chain rods, and a potato supporting bucket is provided every 3-6 chain rods; two lifting active rollers are provided at the upper left of the square ring lifting conveyor chain to respectively mesh and support side chain I and side chain II, two lower left guide rollers are provided at the lower left of the square ring lifting conveyor chain to respectively support side chain I and side chain II, two upper right guide rollers are provided at the upper right of the square ring lifting conveyor chain to respectively support side chain I and side chain II, three lower right small guide rollers supported on side chain I are provided at the lower right of the square ring lifting conveyor chain, and three lower right small guide rollers supported on side chain II are provided at the lower right of the square ring lifting conveyor chain.

[0013] Preferably, the two lifting active rollers are fixedly connected to a lifting active shaft, the third gear box drives the lifting active shaft and the two lifting active rollers to rotate through a chain transmission mechanism, and the lifting active roller drives the chain rod type mesh belt to rotate.

[0014] The working process of this utility model:

[0015] (1) Transportation preparation: The tractor is connected to the traction frame, and the rear power output shaft of the tractor drives the first gear box; the tractor is started to drive the first gear box to work through the rear power output shaft, and the first gear box drives the mechanical transmission mechanism and the hydraulic transmission mechanism to operate and self-check, and the distributor is operated to lift the front end of the frame through the hydraulic drive adjustment cylinder; the rear power output shaft of the tractor stops rotating and enters the transportation walking state, and then the tractor tows the potato combine harvester to the working farmland.

[0016] (2) Operation preparation: The rear power output shaft of the tractor rotates, the mechanical transmission mechanism and the hydraulic transmission mechanism enter the working state, the distributor is operated to drive the adjusting cylinder to make the front end of the frame fall and adjust the digging shovel to an appropriate soil-digging depth; the potato ton bag is hung on the ton bag hook; the pickers occupy the first platform, the second platform, the third platform and the fourth platform respectively; the preparation work for the harvesting operation is completed; the tractor pulls the potato combined harvester into the farmland and enters the harvesting working state.

[0017] (2) Lifting and collecting operations: ① The excavator shovels up the potatoes and soil, and they are sequentially transported to the first conveyor chain and the second conveyor chain. During the backward transportation of the potatoes and soil, the soil leaks into the ground, and the soil is basically clean after the first screening. ② Under the action of the impurity removal roller and impurity removal scraper at the rear of the second conveyor chain, vines, mulch and other impurities are removed. ③ The second conveyor chain transports the potatoes to the square ring lifting conveyor chain. During the process of the square ring lifting conveyor chain transporting the potatoes to the third conveyor chain, a second screening is performed, and most of the remaining soil is screened out. ④ After the third conveyor chain transports the potatoes to its front, the potatoes are diverted to the fourth conveyor chain through the guide trough. The fourth conveyor chain The chain conveys the potatoes to the ton bag under its rear; ⑤ The pickers standing on the first platform, the second platform, the third platform and the fourth platform remove the soil, stones and other impurities on the third conveyor chain and the fourth conveyor chain, and the potatoes conveyed to the ton bag are basically clean potatoes; ⑥ After the ton bag is full of potatoes, the tractor stops moving, the pickers on the third platform and the fourth platform remove the ton bag hook, the manual dispenser starts the lifting cylinder, lowers the ton bag pallet to the ground, and unloads the ton bag filled with potatoes to the ground; ⑦ The manual dispenser starts the lifting cylinder, lifts the ton bag pallet, hangs the empty ton bag on the ton bag hook, the tractor starts moving, and continues the lifting and collecting operations.

[0018] Compared with the prior art, the utility model has the following advantages:

[0019] (1) The utility model is provided with a bagging mechanism at the rear of the fourth conveyor chain. When the ton bag pallet is in the lifting and collecting operation state, the ton bag pallet is lifted to the upper part, the ton bag pallet is parallel to the ground, and the ton bag pallet holds the ton bag to receive potatoes; when the ton bag is full of potatoes and needs to be unloaded, the ton bag pallet descends, and when the uppermost rollers on the left and right sides of the rear vertical frame slide to the right-angle trapezoidal groove, the rear of the ton bag pallet tilts downward under the action of gravity, and the ton bag full of potatoes slides to the ground, completing the unloading operation. Manual picking and manual bagging are not required, which improves work efficiency.

[0020] (2) The utility model arranges the third conveyor chain and the fourth conveyor chain on the upper part of the frame, which prolongs the horizontal conveying stroke and conveying time of potatoes, making it convenient for the pickers to pick up impurities such as soil blocks and stones.

[0021] (3) The utility model is provided with a first platform, a second platform, a third platform and a fourth platform. During the field harvesting process, pickers are arranged on the four platforms to manually pick up impurities such as soil blocks and stones that are difficult to screen out, thereby ensuring that the potatoes loaded into the ton bags are clean and free of impurities.

[0022] (4) The utility model is provided with a debris-removing mechanism, which can remove the ground film and vine plants that cannot be screened out before they enter the square ring lifting conveyor chain, thereby avoiding entanglement with the conveying mechanism of the subsequent process and ensuring smooth lifting and collecting operations.

[0023] (5) The transmission mechanism of the utility model includes a mechanical transmission mechanism and a hydraulic transmission mechanism. The mechanical transmission mechanism directly drives the bottom conveyor chain, the dust-removing mechanism and the square ring lifting conveyor chain to work. It is directly driven and has sufficient power to meet the operating requirements. The hydraulic transmission mechanism drives the third conveyor chain, the fourth conveyor chain, the adjusting cylinder and the lifting cylinder. It has a simple structure, low manufacturing cost and is more convenient to operate.

[0024] (6) The overall design of the utility model is reasonable in structure. The collected potatoes are directly packed into bags without impurities and have high working efficiency. The utility model is particularly suitable for users who plant potatoes on a large scale. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model potato combined harvester from the front side;

[0026] Figure 2 This is a schematic diagram of the three-dimensional structure of the utility model potato combined harvester from the rear side perspective;

[0027] Figure 3 It is a schematic diagram of the side structure of the utility model potato combined harvester in a frame-less state;

[0028] Figure 4 It is a schematic diagram of the three-dimensional structure of the utility model potato combined harvester in a frameless state from the front side perspective;

[0029] Figure 5 It is a three-dimensional structural diagram of the utility model of the potato combined harvester in a state without a frame from a rear side perspective;

[0030] Figure 6 It is a three-dimensional structural diagram of the mechanical transmission mechanism of the utility model potato combined harvester;

[0031] Figure 7 This is a schematic diagram of the connection relationship of the hydraulic transmission mechanism of the utility model potato combined harvester;

[0032] Figure 8 It is a three-dimensional structural schematic diagram of the utility model of the potato combined lifting and collecting machine in a lifted state of the bagging mechanism;

[0033] Fig. 9 It is a three-dimensional structural schematic diagram of the bagging mechanism of the potato combined lifting and collecting machine of the utility model in the falling state;

[0034] Fig.10This is a schematic diagram of the three-dimensional structure of the square ring lifting and conveying chain of the potato combined lifting and harvesting machine of the utility model;

[0035] Fig.11 yes Fig.10 A magnified view of the structure of part A;

[0036] Fig.12 It is a schematic diagram of the three-dimensional structure of the lifting active roller and the lifting active shaft of the square ring lifting conveyor chain of the utility model;

[0037] Fig.13 This is a schematic diagram of the three-dimensional structure of the cutting assembly of the potato combined harvester of the utility model;

[0038] Fig.14 The utility model is a schematic diagram of the three-dimensional structure of the impurity removing mechanism of the combined potato harvester.

[0039] In the figure: 1 walking wheel, 2 digging shovel, 3 first conveyor chain, 4 second conveyor chain, 5 square ring lifting conveyor chain, 6 third conveyor chain, 7 fourth conveyor chain, 8 guide trough, 9 first platform, 10 second platform, 11 third platform, 12 fourth platform, 13 first gear box, 14 second gear box, 15 third gear box, 16 first transmission shaft, 17 second transmission shaft, 18 oil tank, 19 oil pump, 20 distributor, 21 first hydraulic motor, 22 second hydraulic motor, 23 roller arm, 24 de-trash roller, 25 pull roller spring, 26 de-trash scraper, 27 front crossbeam, 28 rear crossbeam, 29 traction frame, 30 front hydraulic claw, 31 rear hydraulic claw, 32 adjusting cylinder, 33 vertical disk arm, 34 horizontal disk arm, 35 elastic support rod, 36 cutting disc, 37 support rod seat, 38 vertical track, 39 front slide, 40 rear slide, 41 right-angle trapezoidal groove, 42 roller, 43 front vertical frame, 44 rear vertical frame, 45 ton bag pallet, 46 lifting cylinder, 47 ton bag hook, 48 fixed pulley, 49 lifting chain, 50 side chain I, 51 side chain II, 52 chain rod, 53 gear rod, 54 potato bucket, 55 lifting active roller, 56 lifting active shaft, 57 lower left guide roller, 58 upper right guide roller, 59 lower right small guide roller. DETAILED DESCRIPTION

[0040] The following is a detailed description of the embodiments of the technical solution of the utility model in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and the protection scope of the utility model cannot be limited thereto. In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "front", "middle", "back", "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0041] Example: Figures 1 to 14 As shown, a potato combined harvester comprises a frame, a digging mechanism, a conveying and screening mechanism, a bagging mechanism and a transmission mechanism. A traction mechanism is provided at the front of the frame, and walking wheels 1 are provided on the left and right sides of the middle and rear part of the frame.

[0042] The traction mechanism includes a front crossbeam 27 and a rear crossbeam 28. The front crossbeam 27 is hinged to a traction frame 29. The rear of the traction frame 29 is connected to two left-right symmetrical front hydraulic claws 30. The rear crossbeam 28 is fixedly connected to two rear hydraulic claws 31 corresponding to the front hydraulic claws 30. An adjusting cylinder 32 is connected between the corresponding front hydraulic claws 30 and rear hydraulic claws 31.

[0043] The excavation mechanism includes an excavating shovel 2 arranged at the front part of the frame; cutting components are arranged on both sides of the excavating shovel 2, and the cutting components include a vertical disk arm 33, a horizontal disk arm 34 and an elastic support rod 35. A cutting disk 36 is installed in the middle of the horizontal disk arm 34 through a disk shaft. The front end of the horizontal disk arm 34 is hinged to the vertical disk arm 33, and the upper end of the vertical disk arm 33 is connected to the front cross beam 27. The rear end of the horizontal disk arm 34 is hinged to the elastic support rod 35, and the upper end of the elastic support rod 35 is connected to a support rod seat 37 arranged on the rear side of the front cross beam 27.

[0044] The conveying and screening mechanism comprises a first conveying chain 3, a second conveying chain 4, a square ring lifting conveying chain 5, a third conveying chain 6 and a fourth conveying chain 7. The first conveying chain 3 and the second conveying chain 4 connected end to end for conveying and screening potatoes backward are arranged at the front lower part of the frame, a de-impurity mechanism is arranged at the rear of the second conveying chain 4, a square ring lifting conveying chain 5 for lifting potatoes is arranged laterally at the rear of the de-impurity mechanism, the third conveying chain 6 for conveying potatoes forward is arranged on the right side of the upper part of the frame, the fourth conveying chain 7 for conveying potatoes backward is arranged in the middle of the upper part of the frame, and a guide groove 8 is arranged between the front ends of the third conveying chain 6 and the fourth conveying chain 7.

[0045] The transmission mechanism includes a first gear box 13 which is connected to the rear power output shaft of the tractor, and the first gear box 13 is driven to connect the mechanical transmission mechanism and the hydraulic transmission mechanism; the mechanical transmission mechanism includes a second gear box 14 and a third gear box 15, the first gear box 13 is connected to the second gear box 14 through a first transmission shaft 16, the second gear box 14 is connected to the third gear box 15 through a chain transmission mechanism, the second gear box 14 is driven to connect the second conveying chain 4 and the first conveying chain 3 through the chain transmission mechanism, the third gear box 15 is driven to connect the de-mixing mechanism through the second transmission shaft 17 and the belt transmission mechanism, and the third gear box 15 is driven to connect the square ring lifting conveying chain 5 through the chain transmission mechanism.

[0046] The hydraulic transmission mechanism includes an oil tank 18, an oil pump 19 driven by the first gear box 13, a distributor 20 installed on the rear right side of the fourth conveying chain 7, a first hydraulic motor 21 driving the third conveying chain 6, and a second hydraulic motor 22 driving the fourth conveying chain 7.

[0047] A first platform 9 is provided at the front and right side of the third conveyor chain 6, a second platform 10 is provided at the front left side of the fourth conveyor chain 7, and a third platform 11 and a fourth platform 12 are provided at the left and right sides of the rear of the fourth conveyor chain 7 respectively.

[0048] The bagging mechanism includes two vertical rails 38 symmetrically arranged on the rear frame of the fourth conveyor chain, and the inner sides of the two vertical rails 38 are provided with a front slide groove 39 and a rear slide groove 40, and the lower part of the rear slide groove 40 is widened to a right-angle trapezoidal groove 41 backward; the two front slide grooves 39 are equipped with a liftable front vertical frame 43 through rollers 42, and the two rear slide grooves 40 are equipped with a liftable rear vertical frame 44 through rollers 42, the lower ends of the front vertical frame 43 and the rear vertical frame 44 are hinged together, and the rear lower part of the rear vertical frame 44 is connected to a ton bag pallet 45, and the front vertical frame 43 is provided with two lifting cylinders 46 vertically installed on the frame at the front part, and a fixed pulley 48 is provided at the upper end of the piston rod of the lifting cylinder 46, and a lifting chain 49 is supported and connected on the fixed pulley 48, one end of the lifting chain 49 is connected to the cylinder body of the lifting cylinder 46, and the other end of the lifting chain 49 is connected to the front vertical frame 43; four ton bag hooks 47 are provided on the frame above the ton bag pallet 45.

[0049] The lifting cylinder 46 drives the front vertical frame 43, the rear vertical frame 44 and the ton bag pallet 45 to rise and fall synchronously. When the lifting and collecting operation is in progress, the ton bag pallet 45 is lifted to the upper part, and the rollers 42 on the left and right sides of the rear vertical frame 44 slide to the upper part of the rear slide 40. The ton bag pallet 45 is parallel to the ground, and the ton bag pallet 45 holds the ton bag to receive potatoes. When the ton bag is full of potatoes and needs to be unloaded, the ton bag pallet 45 descends. When the uppermost rollers 42 on the left and right sides of the rear vertical frame 44 slide to the right-angled trapezoidal groove 41, under the action of gravity, the rear part of the ton bag pallet 45 tilts downward, and the ton bag full of potatoes slides to the ground, completing the unloading operation.

[0050] The de-impurity mechanism includes roller arms 23 hinged on the left and right sides of the rear frame of the second conveyor chain 4, a de-impurity roller 24 is connected between the lower ends of the two roller arms 23, the middle parts of the two roller arms 23 are connected to press the de-impurity roller 24 against the pull roller spring 25 at the rear end of the second conveyor chain 4, and a de-impurity scraper 26 is provided on the lower side of the de-impurity roller 24; the second transmission shaft 17 drives the de-impurity roller 24 to rotate through the belt transmission mechanism to achieve the function of removing impurities such as vines and ground film.

[0051] The square ring lifting conveyor chain 5 comprises a chain rod type mesh belt; the chain rod type mesh belt comprises a side chain Ⅰ50 and a side chain Ⅱ51, and the side chains Ⅰ50 and Ⅱ51 are connected with chain rods 52 and potato supporting buckets 54 at equal intervals, and the two ends of the chain rods 52 are provided with gear rods 53, and a potato supporting bucket 54 is arranged every four chain rods 52; the square ring lifting conveyor chain 5 is provided with two lifting active rollers 55 which mesh and support the side chains Ⅰ50 and Ⅱ51 respectively on the upper left, and the square ring lifting conveyor chain 5 is provided with two lower left guide rollers 57 which support the side chains Ⅰ50 and Ⅱ51 respectively on the lower left. Two upper right guide rollers 58 supporting the side chain Ⅰ50 and the side chain Ⅱ51 are arranged on the upper right of the lifting conveyor chain 5, and three lower right small guide rollers 59 supported on the side chain Ⅰ50 are arranged on the lower right of the square ring lifting conveyor chain 5, and three lower right small guide rollers 59 supported on the side chain Ⅱ51 are arranged on the lower right of the square ring lifting conveyor chain 5; two lifting active rollers 55 are fixedly connected to a lifting active shaft 56, and the third gear box 15 drives the lifting active shaft 56 and the two lifting active rollers 55 to rotate through the chain transmission mechanism, and the lifting active roller 55 drives the chain rod type mesh belt to rotate.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.

Claims

1. A potato combined harvester, comprising a frame, a digging mechanism, a conveying and screening mechanism, a bagging mechanism and a transmission mechanism, characterized in that: A traction mechanism is provided at the front of the frame, and walking wheels are provided on the left and right sides of the middle and rear parts of the frame; the excavating mechanism includes an excavating shovel arranged at the front of the frame; the conveying and screening mechanism includes a bottom conveying chain, a square ring lifting conveying chain, a third conveying chain and a fourth conveying chain. A bottom conveying chain for conveying and screening potatoes backward is provided at the front lower part of the frame, a de-mixing mechanism is provided at the rear of the bottom conveying chain, a square ring lifting conveying chain for lifting potatoes is laterally provided at the rear of the de-mixing mechanism, a third conveying chain for conveying potatoes forward is provided at the right side of the upper part of the frame, a fourth conveying chain for conveying potatoes backward is provided in the middle of the upper part of the frame, and a guide groove is provided between the front ends of the third conveying chain and the fourth conveying chain; the bagging mechanism is provided at the rear of the fourth conveying chain; the transmission mechanism includes a first gear box connected to the rear power output shaft of the tractor, and the first gear box drives and connects the mechanical transmission mechanism and the hydraulic transmission mechanism; a first platform is provided at the front and right side of the third conveying chain, a second platform is provided at the left side of the front of the fourth conveying chain, and two left and right platforms are provided at the rear of the fourth conveying chain. The third platform and the fourth platform are respectively provided on the sides; the dust-removing mechanism includes roller arms hinged on the left and right sides of the rear frame of the second conveyor chain, the dust-removing roller is connected between the lower ends of the two roller arms, the middle parts of the two roller arms are connected to press the dust-removing roller against the pull roller spring at the rear end of the second conveyor chain, and a dust-removing scraper is provided on the lower side of the dust-removing roller; the second transmission shaft drives the dust-removing roller to rotate through a belt or chain transmission mechanism; the bagging mechanism includes two vertical rails symmetrically arranged on the left and right sides of the rear frame of the fourth conveyor chain, and the two vertical rails are connected to the rear frame of the fourth conveyor chain. There are front slides and rear slides on the inner side of the track, and the lower part of the rear slide is widened to a right-angle trapezoidal groove backward; the two front slides are equipped with liftable front vertical frames through rollers, and the two rear slides are equipped with liftable rear vertical frames through rollers. The lower ends of the front vertical frames and the rear vertical frames are hinged together, and the lower rear part of the rear vertical frame is connected to the ton bag pallet. The front part of the front vertical frame is equipped with two lifting cylinders vertically installed on the frame, and the lifting cylinders drive the front vertical frame, the rear vertical frame and the ton bag pallet to rise and fall synchronously; four ton bag hooks are arranged on the frame above the ton bag pallet.

2. The potato combined harvester according to claim 1, characterized in that: The bottom conveying chain comprises a first conveying chain and a second conveying chain connected end to end, and the impurity removing mechanism is arranged at the rear of the second conveying chain.

3. The potato combined harvester according to claim 2, characterized in that: The mechanical transmission mechanism includes a second gear box and a third gear box, the first gear box is connected to the second gear box through a first transmission shaft, the second gear box is connected to the third gear box through a chain transmission mechanism, the second gear box is driven to connect the second conveying chain and the first conveying chain through the chain transmission mechanism, the third gear box is driven to connect the de-dusting mechanism through a second transmission shaft, a belt or a chain transmission mechanism, and the third gear box is driven to connect the square ring lifting conveying chain through the chain transmission mechanism; the hydraulic transmission mechanism includes an oil tank, an oil pump, a distributor, a first hydraulic motor driving the third conveying chain, and a second hydraulic motor driving the fourth conveying chain.

4. The potato combined harvester according to claim 1, characterized in that: The traction mechanism comprises a front crossbeam and a rear crossbeam, the front crossbeam is hinged to a traction frame, the rear of the traction frame is connected to two left-right symmetrical front hydraulic claws, the rear crossbeam is fixedly connected to two rear hydraulic claws corresponding to the front hydraulic claws, and an adjusting cylinder driven by a hydraulic transmission mechanism is connected between the corresponding front hydraulic claws and the rear hydraulic claws.

5. The potato combined harvester according to claim 4, characterized in that: The excavation mechanism also includes a cutting assembly arranged on both sides of the excavation shovel, the cutting assembly includes a vertical disc arm, a horizontal disc arm and an elastic support rod, the cutting disc is installed in the middle of the horizontal disc arm through a disc shaft, the front end of the horizontal disc arm is hinged to the vertical disc arm, the upper end of the vertical disc arm is connected to the front cross beam, the rear end of the horizontal disc arm is hinged to the elastic support rod, and the upper end of the elastic support rod is connected to a support rod seat arranged on the rear side of the front cross beam.

6. The potato combined harvester according to claim 1, characterized in that: A fixed pulley is arranged on the upper end of the piston rod of the lifting oil cylinder, and a lifting chain is supported and connected to the fixed pulley. One end of the lifting chain is connected to the cylinder body of the lifting oil cylinder, and the other end of the lifting chain is connected to the front vertical frame.

7. The potato combined harvester according to claim 6, characterized in that: The square ring lifting conveyor chain includes a chain rod type mesh belt; the chain rod type mesh belt includes side chain I and side chain II, chain rods and potato supporting buckets are connected at equal intervals between side chain I and side chain II, shift rods are provided at both ends of the chain rods, and a potato supporting bucket is provided every 3-6 chain rods; two lifting active rollers are provided at the upper left of the square ring lifting conveyor chain to respectively mesh and support side chain I and side chain II, two lower left guide rollers are provided at the lower left of the square ring lifting conveyor chain to respectively support side chain I and side chain II, two upper right guide rollers are provided at the upper right of the square ring lifting conveyor chain to respectively support side chain I and side chain II, three lower right small guide rollers supported on side chain I are provided at the lower right of the square ring lifting conveyor chain, and three lower right small guide rollers supported on side chain II are provided at the lower right of the square ring lifting conveyor chain.

8. The potato combined harvester according to claim 7, characterized in that: The two lifting active rollers are fixedly connected to a lifting active shaft, and the third gear box drives the lifting active shaft and the two lifting active rollers to rotate through a chain transmission mechanism, and the lifting active roller drives the chain rod type mesh belt to rotate.

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