A potato harvesting device

Abstract

The present application discloses a potato harvesting device, which includes a frame, a digging mechanism, a screening mechanism and a traveling mechanism. The screening mechanism is arranged on the frame, and the digging mechanism is arranged on the feeding side of the screening mechanism; the traveling mechanism includes a traveling wheel set and a crawler wheel set arranged at the bottom of the frame. The traveling wheel set is adapted to lift at least one side of the frame off the ground. The digging mechanism and the screening mechanism are arranged on the frame to cooperate with the traveling wheel set to form a stable center of gravity. The traveling wheel set is located between the digging mechanism and the stable center of gravity, and the crawler wheel set is located between the digging mechanism and the traveling wheel set. The digging mechanism and the crawler wheel set are adapted to be away from the ground when the frame is placed independently. At least one first connecting mechanism is arranged on the frame, and the first connecting mechanism is adapted to connect auxiliary equipment to lower the digging mechanism and the crawler wheel set to the ground. This potato harvesting device has the characteristics of small volume, convenient handling, and the ability to use different harvesting methods.

Description

Technical Field

[0001] This application relates to the technical field of agricultural harvesting machinery, and particularly relates to a potato harvesting device. Background Art

[0002] Potatoes, that is, sweet potatoes, generally grow in the ground. Therefore, potato harvesting has always been a production link with high labor intensity and relatively poor working environment. Currently, when harvesting potatoes, most use harvesting machinery for collection and mechanized processing, which saves time and effort and brings a lot of convenience to our lives.

[0003] However, the existing potato harvesting devices have the following defects: The potato harvesters that can perform self-propelled excavation and harvesting on the market are usually mainly medium and large-sized equipment, which are difficult to use in relatively narrow spaces such as hilly areas. While small potato harvesters usually require traction equipment for transportation and use in the field, resulting in certain requirements for the size of the use space. Summary of the Invention

[0004] An object of this application is to provide a potato harvesting device with a small volume, convenient for handling and placement, and having multiple harvesting methods.

[0005] To achieve the above object, the technical solution adopted in this application is: A potato harvesting device includes a frame, a digging mechanism, a screening mechanism, and a traveling mechanism. The screening mechanism is arranged on the frame, and the digging mechanism is arranged on the feeding side of the screening mechanism;

[0006] The traveling mechanism includes a traveling wheel set and a crawler wheel set arranged at the bottom of the frame. The traveling wheel set is adapted to lift at least one side of the frame off the ground. The digging mechanism and the screening mechanism are arranged on the frame to cooperate with the traveling wheel set to form a stable center of gravity. The traveling wheel set is located between the digging mechanism and the stable center of gravity, and the crawler wheel set is located between the digging mechanism and the traveling wheel set. The digging mechanism and the crawler wheel set are adapted to be away from the ground when the frame is placed independently. At least one first connection mechanism is arranged on the frame, and the first connection mechanism is adapted to connect an auxiliary device to lower the digging mechanism and the crawler wheel set to the ground.

[0007] As an improvement, the first connection mechanism is arranged on the discharging side of the screening mechanism. The auxiliary device includes a harvesting hopper cart, and a second connection mechanism is arranged on the harvesting hopper cart. The first connection mechanism is adapted to be fixedly connected to the second connection mechanism so that the harvesting hopper cart and the traveling wheel set support the frame on both sides of the stable center of gravity respectively.

[0008] As an improvement, the first connection mechanism includes a connecting rod and a connection hole. The connection hole is formed in the frame between the connecting rod and the steady-state center of gravity. The second connection mechanism includes a connection hook groove and a connection pin. When the first connection mechanism is fixedly connected to the second connection mechanism, the connection hook groove is adapted to rotatably lift the connecting rod, and the connection pin is adapted to be inserted into the connection hole in a plug-in fit.

[0009] As an improvement, the traveling mechanism further includes a power mechanism connected to the crawler wheel set. A control mechanism is provided on the frame. The control mechanism includes a control switch and a sensor. The sensor is disposed in the connection hole, and the control switch is disposed at one end of the connection hole. The connection pin is adapted to be inserted into the connection hole from the other end. The control switch or the connection pin is adapted to trigger the sensor. When the control mechanism is triggered, the power mechanism is adapted to operate and engage with the traveling wheel set for transmission, so that the power mechanism drives the traveling wheel set and the crawler wheel set simultaneously.

[0010] As an improvement, the first connection mechanism includes a connection hook buckle. The connection hook buckle is disposed on the feeding side of the screening mechanism. The auxiliary equipment includes a traction machine. The connection hook buckle is adapted to be connected to the traction machine.

[0011] As an improvement, the traveling mechanism further includes a power mechanism connected to the crawler wheel set. A control mechanism is provided on the frame. The control mechanism is adapted to be manually triggered or triggered in cooperation with the auxiliary equipment. When the control mechanism is triggered, the power mechanism is adapted to operate and engage with the traveling wheel set and the crawler wheel set for transmission, so that the power mechanism drives the traveling wheel set and the crawler wheel set simultaneously.

[0012] As an improvement, the crawler wheel set includes a crawler bracket and at least two movable wheels. The crawler bracket is movably connected to the frame. The movable wheels are disposed on the crawler bracket. The movable wheels are in transmission connection with the power mechanism. The movable wheels are arranged on both sides of the connection between the crawler bracket and the frame. A buffer assembly is provided at the connection between the crawler bracket and the frame. The buffer assembly is adapted to make the movable wheels have a movement tendency towards the ground.

[0013] Preferably, the power mechanism includes a power source and a clutch. The clutch connects the power source and the traveling wheel set.

[0014] As an improvement, the screening mechanism includes a vibrating conveying component, a stirring conveying component and a driver. The driver is connected to the vibrating conveying component and the stirring conveying component and drives them to operate. The vibrating conveying component is connected to the excavation mechanism and the stirring conveying component. The vibrating conveying component is adapted to vibrate and lift upward to convey the objects at the excavation mechanism to the stirring conveying component. At least one stirrer is arranged in the stirring conveying component, and the stirrer is adapted to rotate in a vertical plane in a direction away from the vibrating conveying component.

[0015] As an improvement, the vibrating conveying component includes two conveyor belts arranged at equal intervals. A plurality of conveying rollers are distributed at equal intervals between the two conveyor belts along the conveying direction. At least one vibrator is arranged on the frame, and the vibrator is adapted to vibrate the conveyor belt; the stirring conveying component includes a containing cavity. Feeding ports and discharging ports are respectively arranged on both sides of the containing cavity. The feeding port is matched with the vibrating conveying component. The stirrer is arranged in the containing cavity. At least one mud leakage port is arranged at the bottom of the containing cavity; the number of the stirrers is the same as that of the mud leakage ports. When the stirrer rotates to the position of the mud leakage port, the part with a gap is adapted to be partially fitted into the mud leakage port; the number of the stirrers is multiple, and the stirrers are arranged at equal intervals from both sides of the containing cavity to the middle of the containing cavity in the order of passing through the feeding port and the discharging port from the front to the back.

[0016] Compared with the prior art, the beneficial effects of the present application are as follows:

[0017] 1. The potato harvesting device of the present application can be externally connected to a traction device through the traveling wheel set to help the whole device move, improving the convenience of handling. The self-propulsion under hard soil can be realized through the traveling wheel set, and the self-propulsion under soft soil can be realized through the crawler wheel set. With the mutual cooperation of the traveling wheel set and the crawler wheel set, the self-propelled harvesting of the device under different soil environments can be adapted, the traveling is more stable and it is not easy to sink into the soil. It is possible not to externally connect a traction device, having higher applicability.

[0018] 2. The potato harvesting device of the present application sets the overall center of gravity by arranging the positions of the mechanisms configured thereon, so as to realize the separation between the excavation mechanism and the crawler wheel set and the ground in the placed state, avoiding contact collision and wear between the excavation mechanism and the crawler wheel set and the ground when the device is stored, placed, carried or moved.

[0019] 3. The potato harvesting device of the present application can choose to externally connect a traction device for harvesting. The traveling wheel set and the crawler wheel set can automatically disconnect the connection and transmission with the power mechanism when the power mechanism is not started, so that the whole device can be driven by the traction device to perform passive traveling, realizing different harvesting methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is an overall structural view according to a preferred embodiment of the present application;

[0021] Figure 2 is a schematic diagram of the state placed on the ground and under the steady-state center of gravity according to a preferred embodiment of the present application;

[0022] Figure 3 is a schematic diagram of the state where the first connecting mechanism is connected to the auxiliary device according to a preferred embodiment of the present application;

[0023] Figure 4 is a schematic diagram of the state where the first connecting mechanism is connected to the auxiliary device according to another preferred embodiment of the present application;

[0024] Figure 5 is an overall structural view of the connection between the first connecting mechanism and the auxiliary device according to another preferred embodiment of the present application;

[0025] Figure 6 is a schematic view of the connection between the first connecting mechanism and the second connecting mechanism according to another preferred embodiment of the present application;

[0026] Figure 7 is a bottom structural view according to a preferred embodiment of the present application;

[0027] Figure 8 is a schematic diagram of the connection structure of the crawler wheel set according to a preferred embodiment of the present application;

[0028] Figure 9 is a schematic diagram of the connection structure of the screening mechanism according to a preferred embodiment of the present application;

[0029] Figure 10 is an overall structural view of the stirring and conveying assembly according to a preferred embodiment of the present application;

[0030] Figure 11 is a front view of the stirring and conveying assembly according to a preferred embodiment of the present application;

[0031] Figure 12 is an overall structural view of the excavating mechanism according to a preferred embodiment of the present application;

[0032] Figure 13 is a side view of the excavating mechanism according to a preferred embodiment of the present application.

[0033] In the figure: 1. Frame; 2. Excavating mechanism; 21. Excavating frame; 22. Scraper; 221. Chamfer; 3. Screening mechanism; 31. Vibrating conveying assembly; 311. Conveyor belt; 312. Conveying roller; 313. Vibrator; 32. Stirring and conveying assembly; 321. Accommodating cavity; 3211. Feed inlet; 3212. Discharge outlet; 322. Stirrer; 323. Mud leakage port; 33. Driver; 4. Traveling mechanism; 41. Road wheelset; 42. Track wheelset; 421. Track support; 422. Movable wheel; 423. Buffer assembly; 43. Power mechanism; 5. First connecting mechanism; 51. Connecting hook; 52. Connecting rod; 53. Connecting hole; 6. Auxiliary equipment; 61. Vehicle; 62. Harvesting hopper car; 621. Second connecting mechanism; 6211. Connecting hook groove; 6212. Connecting pin; 7. Control mechanism; 71. Control switch; 72. Inductor. Detailed implementation manners

[0034] Next, in combination with the detailed implementation manners, the present application will be further described. It should be noted that, on the premise of no conflict, the following-described embodiments or technical features can be arbitrarily combined to form new embodiments.

[0035] In the description of the present application, it should be noted that for orientation terms, if there are terms such as "center", "transverse", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation and position relationship are based on the orientation or position relationship shown in the drawings. It is only for the convenience of describing the present application 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 should not be construed as limiting the specific protection scope of the present application.

[0036] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects and do not necessarily need to describe a specific order or sequence.

[0037] The terms "comprising" and "having" in the description and claims of the present application and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or are inherent to these processes, methods, products or devices.

[0038] Next, the present application will be further described with reference to the accompanying drawings:

[0039] As Figures 1 to 13As shown in the figure, the present application provides a potato harvesting device, which includes a frame 1, a digging mechanism 2, a screening mechanism 3 and a traveling mechanism 4. The screening mechanism 3 is arranged on the frame 1, and the digging mechanism 2 is arranged on the feeding side of the screening mechanism 3. The frame 1 is used to support and fix the digging mechanism 2, the screening mechanism 3 and the traveling mechanism 4. The traveling mechanism 4 is mainly used to help the potato harvesting device move. The digging mechanism 2 can dig out the potatoes in the soil by using the movement of the potato harvesting device in the field. The screening mechanism 3 can screen and separate the potatoes dug out by the digging mechanism 2 from the soil.

[0040] As Figure 2 shown in the embodiment, the traveling mechanism 4 includes a traveling wheel set 41 and a crawler wheel set 42 arranged at the bottom of the frame 1. The traveling wheel set 41 is in the form of a traditional wheel. In this form, it can not only help the frame 1 walk on the hard ground to realize handling and movement, but also help the frame 1 move in the field soil, so that the digging mechanism 2 can dig potatoes. The contact surface of the crawler wheel set 42 is relatively large, which can assist the traveling wheel set 41 to make the frame 1 move in the field soil, effectively avoiding the situation that the traveling wheel set 41 sinks into the soft soil texture of the field soil, and improving the stability of the frame 1 during movement.

[0041] The traveling wheel set 41 is adapted to lift at least one side of the frame 1 off the ground. The digging mechanism 2 and the screening mechanism 3 are arranged on the frame 1 and cooperate with the traveling wheel set 41 to form a stable center of gravity G. The stable center of gravity G refers to the center of gravity formed when the traveling wheel set 41 is static on the ground and the frame 1 is under no external force. The traveling wheel set 41 is located between the digging mechanism 2 and the stable center of gravity G, and the crawler wheel set 42 is located between the digging mechanism 2 and the traveling wheel set 41. The frame 1 and the traveling wheel set 41 cooperate to form a seesaw structure. By using the layout relationship between the traveling wheel set 41 and the stable center of gravity G, one side of the frame 1 can automatically tilt up and away from the ground under no external force. When this side is the feeding side of the potato harvesting device, it can realize that the digging mechanism 2 and the crawler wheel set 42 are away from the ground when the frame 1 is placed independently.

[0042] There are certain defects in directly using the crawler wheel set 42 and the digging mechanism 2 on the frame 1. The wear rate of the crawler wheel set 42 will become faster when it contacts with the hard ground. And the digging mechanism 2 is arranged on the side of the frame 1 close to the ground for digging. When the potato harvesting device is placed, it may contact and collide with the ground, resulting in wear and damage.

[0043] The design that the digging mechanism 2 and the crawler wheel set 42 automatically move away from the ground by relying on the stable center of gravity G when the frame 1 is placed independently can greatly improve the service life of the crawler wheel set 42 and can protect the digging mechanism 2 to avoid damage to the digging mechanism 2.

[0044] At least one first connecting mechanism 5 is provided on the frame 1. The first connecting mechanism 5 is adapted to connect the auxiliary device 6 to lower the excavating mechanism 2 and the crawler wheel set 42 to the ground. In the form of connecting the auxiliary device 6, the frame 1 is flipped to overcome the steady-state center of gravity G, changing the positions of the excavating mechanism 2 and the crawler wheel set 42, enabling the excavating mechanism 2 and the crawler wheel set 42 to return to their original working positions, that is, making the crawler wheel set 42 close to or in contact with the ground and the excavating mechanism 2 close to the ground, thereby entering the working state, so that the excavating mechanism 2 and the crawler wheel set 42 can realize their inherent functions.

[0045] In the Figure 3 embodiment shown, the first connecting mechanism 5 includes a connecting hook 51. The connecting hook 51 is arranged on the feeding side of the screening mechanism 3. The auxiliary device 6 includes a towing machine. The connecting hook 51 is adapted to be connected to the towing machine. The specific form of the connecting hook 51 can be an existing trailer hook structure. The towing machine can specifically be a tractor and a vehicle 61 in the prior art, etc. After the towing machine is connected to the frame 1 through the connecting hook 51, it can prevent the frame 1 on the feeding side of the screening mechanism 3 from tilting up, making the excavating mechanism 2 close to the ground. At the same time, the crawler wheel set 42 touches the ground. At this time, it can rely on the power of the towing machine itself to help the frame 1 move, can also rely on the traveling mechanism 4 to help the frame 1 move, and can also help the frame 1 move under the combined action of the towing machine and the traveling mechanism 4.

[0046] In the Figure 4 embodiment shown, the first connecting mechanism 5 is arranged on the discharging side of the screening mechanism 3. The auxiliary device 6 includes a harvesting hopper car 62. The harvesting hopper car 62 can collect the potatoes falling on the discharging side of the screening mechanism 3, facilitating subsequent transportation. The harvesting hopper car 62 is provided with wheels that can be flipped. A second connecting mechanism 621 is arranged on the harvesting hopper car 62. The first connecting mechanism 5 is adapted to be fixedly connected to the second connecting mechanism 621, so that the harvesting hopper car 62 and the traveling wheel set 41 support the frame 1 on both sides of the steady-state center of gravity G respectively. After the frame 1 is supported, it can overcome the steady-state center of gravity G and flip, enabling the excavating mechanism 2 and the crawler wheel set 42 to return to their original working positions, that is, making the crawler wheel set 42 close to or in contact with the ground and the excavating mechanism 2 close to the ground, thereby entering the working state.

[0047] In the Figures 5 to 6In the described embodiment, the first connection mechanism 5 includes a connecting rod 52 and a connection hole 53. The connection hole 53 is formed in the frame 1 between the connecting rod 52 and the steady-state center of gravity G. The second connection mechanism 621 includes a connection hook groove 6211 and a connection pin 6212. When the first connection mechanism 5 is fixedly connected to the second connection mechanism 621, the connection hook groove 6211 is adapted to rotatably lift the connecting rod 52, and the connection pin 6212 is adapted to be inserted into and cooperate with the connection hole 53. An elastic reset member can be provided at the connection pin 6212, and when the connection groove is at the connection hole, it can automatically pop out and be inserted into the connection hole for cooperation.

[0048] In some embodiments, the end of the connection pin 6212 extends outside the harvesting hopper car 62. By pulling the end of the connection pin 6212 to make it move, unlocking between the connection pin 6212 and the connection hole 53 can be achieved.

[0049] The specific connection process of the first connection mechanism 5 and the second connection mechanism 621 is as follows: Move the harvesting hopper car 62 close to the frame 1, flip the harvesting hopper car 62 so that the connection hook groove 6211 is connected to the connecting rod 52 to achieve primary positioning. Press down the rear end of the harvesting hopper car 62, and the front end of the harvesting hopper car 62 will lift up. The connection hook groove 6211 can lift the connecting rod 52, and at the same time, relative rotation occurs between the connection hook groove 6211 and the connecting rod 52, causing the connection pin 6212 to approach the frame 1. When the harvesting hopper car 62 is flipped until the connection pin 6212 is located at the connection hole 53, the connection pin 6212 can automatically pop out and be inserted into the connection hole 53 to achieve secondary positioning. Through the secondary positioning, the fixed connection and support between the frame 1 and the harvesting hopper car 62 are realized, preventing the two from flipping.

[0050] Through the above connection form and operation logic of the frame 1 and the harvesting hopper car 62, it can be ensured that the potato harvesting device will not operate in a static state. When in use, only the harvesting hopper car 62 needs to be externally connected. While enabling the potato harvesting device to enter the working state with the assistance of the harvesting hopper car 62, the harvesting hopper car 62 can also be used as a starting source, making it safer to use and less prone to misoperation.

[0051] In some embodiments, the number of the first connection mechanisms 5 is two. One first connection mechanism 5 is provided on each of the feeding side and the discharging side of the screening mechanism 3 of the frame 1. A connection hook 51 is provided on the feeding side of the frame 1, and a connecting rod 52 and a connection hole 53 are provided on the discharging side of the frame 1, enabling the frame 1 to be towed by a trailer and also to achieve self-propelled harvesting by connecting the harvesting hopper car 62, meeting more usage scenarios and having stronger practicability.

[0052] As Figure 7In the illustrated embodiment, the traveling mechanism 4 further includes a power mechanism 43 connected to the crawler wheel set 42. A control mechanism 7 is provided on the frame 1. The control mechanism 7 includes a control switch 71 and a sensor 72. The sensor 72 is disposed within the connection hole 53. The control mechanism 7 is adapted to be manually triggered or triggered in cooperation with the auxiliary device 6. When the control mechanism 7 is triggered, the power mechanism 43 is adapted to operate and mesh with the road wheel set 41 for driving, so that the power mechanism 43 drives both the road wheel set 41 and the crawler wheel set 42 simultaneously.

[0053] In some embodiments, the manual trigger means that: the control switch 71 is disposed at one end of the connection hole 53, and an operator directly operates the control switch 71 to make the power mechanism 43 operate, thereby realizing the movement of the frame 1.

[0054] In some embodiments, the trigger in cooperation with the auxiliary device 6 means that: the connecting pin 6212 is adapted to be inserted from the other end of the connection hole 53, and the connecting pin 6212 is adapted to trigger the sensor 72, so as to realize the automatic operation of the power mechanism 43 when the frame 1 is connected to the harvesting hopper cart 62.

[0055] The traveling mechanism 4 can be started in various ways to ensure that it can be started in different usage scenarios and help the frame 1 move.

[0056] Both the manual trigger and the trigger in cooperation with the auxiliary device 6 are triggered by one sensor 72, which can reduce the structural complexity. There can also be a linkage between the two trigger forms of the manual trigger and the trigger in cooperation with the auxiliary device 6. When the trigger in cooperation with the auxiliary device 6 occurs, the state of the manual trigger can be automatically released, that is, the connecting pin 6212 can pop up the control switch 71 to trigger the switching of the sensor 72, and the two will not conflict.

[0057] In some embodiments, the sensing form of the sensor 72 can be pressure sensing. When the control switch 71 or the connecting pin 6212 slides and presses the sensor 72, the sensor 72 can be triggered.

[0058] In some embodiments, the sensing form of the sensor 72 can be proximity sensing. When the control switch 71 or the connecting pin 6212 slides and approaches the sensor 72, the sensor 72 can be triggered.

[0059] As Figure 8 In the illustrated embodiment, the crawler wheel set 42 includes a crawler bracket 421 and at least two movable wheels 422. The crawler bracket 421 is movably connected to the frame 1. The movable wheels 422 are disposed on the crawler bracket 421. The movable wheels 422 are in transmission connection with the power mechanism 43. The movable wheels 422 are arranged on both sides of the connection between the crawler bracket 421 and the frame 1. A buffer assembly 423 is provided at the connection between the crawler bracket 421 and the frame 1. The buffer assembly 423 is adapted to make the movable wheels 422 have a tendency to move towards the ground.

[0060] In some embodiments, the number of the movable wheels 422 is two, and the two movable wheels 422 are respectively arranged at both ends of the crawler bracket 421. The crawler bracket 421 is of an inverted V-shaped structure, which can not only make full use of the space below the screening mechanism 3, but also enable the movable wheels 422 at both ends to contact the ground preferentially. Since the ground of the field is relatively uneven in the working environment of the potato harvesting device, the inverted V-shaped design of the crawler bracket 421 can improve the structural strength and avoid the crawler from directly contacting the ground and being worn.

[0061] In some embodiments, the buffer assembly 423 is a shock absorber. The middle part of the crawler bracket 421 is slidably arranged on the frame 1, and the shock absorber abuts against the middle part of the buffer assembly 423 to prevent relative sliding between the crawler bracket 421 and the frame 1.

[0062] In some embodiments, the middle part of the crawler bracket 421 is slidably connected to the frame 1 and can rotate at the same time. The buffer assembly 423 abuts against the middle part of the crawler bracket 421 to prevent it from rotating. The rotation amplitude of the crawler bracket 421 does not exceed the connection allowance between the crawler and the crawler bracket 421, so as to avoid the crawler bracket 421 from being separated from the crawler during the movement. By sliding and rotatingly connecting with the frame 1, the crawler bracket 421 can obtain a greater degree of freedom of movement and adapt to the uneven field ground.

[0063] The specific implementation form of the sliding and rotating of the crawler bracket 421 is as follows: a sliding groove is formed on the frame 1, the middle part of the crawler bracket 421 is rotatably and slidably arranged in the sliding groove, a pressing plate is fixedly connected to the middle part of the crawler bracket 421 in the sliding groove, and the buffer assembly 423 presses against the pressing plate to prevent the crawler mechanism from rotating and sliding.

[0064] The specific structure of the shock absorber and the connection and setting mode between the shock absorber and the crawler bracket 421 are prior art, and reference can be made to the structural schematic diagram in the appendix Figure 8 and will not be elaborated herein.

[0065] In some embodiments, the power mechanism 43 includes a power source and a clutch. The power source can be a driving device such as an electric motor in the prior art. The clutch connects the power source and the road wheel set 41. The clutch can disconnect the connections between the road wheel set 41 and the power source and between the crawler wheel set 42 and the power source. When the power source stops, the road wheel set 41 can rotate freely, so as to realize the external towing of the frame 1 and avoid damaging the power source during the towing process. The specific structure and setting mode of the clutch are prior art and will not be elaborated herein.

[0066] Such as Figure 9In the illustrated embodiment, the screening mechanism 3 includes a vibrating conveying assembly 31, a stirring conveying assembly 32, and a driver 33. The driver 33 is connected to the vibrating conveying assembly 31 and the stirring conveying assembly 32 and drives them to operate. The vibrating conveying assembly 31 is connected to the excavating mechanism 2 and the stirring conveying assembly 32. The vibrating conveying assembly 31 is adapted to vibrate and lift upward the objects at the excavating mechanism 2 to the stirring conveying assembly 32. At least one stirrer 322 is provided in the stirring conveying assembly 32. The stirrer 322 is adapted to rotate in a vertical plane in a direction away from the vibrating conveying assembly 31, first loosen the soil on the surface of the potatoes by vibration, and then preliminarily remove the soil on the surface by stirring, so as to realize the screening and discharging of the potatoes.

[0067] The connection manners of the driver 33 with the vibrating conveying assembly 31 and with the stirring conveying assembly 32 are prior arts, and thus will not be elaborated herein.

[0068] In some embodiments, the vibrating conveying assembly 31 includes two conveyor belts 311 arranged at equal intervals. A plurality of conveying rollers 312 are transversely and equally spaced between the two conveyor belts 311 along the conveying direction. The setting interval between the conveying rollers 312 needs to be smaller than the minimum clearance of the potatoes. The feeding side of the conveyor belt 311 is lower than the discharging side. The conveyor belt 311 controls the conveying rollers 312 to move from low to high. At least one vibrator 313 is provided on the frame 1. The vibrator 313 is adapted to vibrate the conveyor belt 311. The conveyor belt 311 with a frame structure can directly separate the soil that has loosened and fallen from the potatoes, effectively avoiding the accumulation and blockage of the soil.

[0069] In some embodiments, the number of the vibrators 313 is multiple, and the vibrators 313 are arranged at equal intervals, so as to improve the vibration intensity and vibration uniformity and achieve a better soil loosening effect.

[0070] As Figures 10 to 11 In the illustrated embodiment, the stirring conveying assembly 32 includes a receiving cavity 321. Feeding ports 3211 and discharging ports 3212 are respectively opened on both sides of the receiving cavity 321. The feeding port 3211 cooperates with the vibrating conveying assembly 31. For the convenience of feeding, the feeding port 3211 can be slightly lower than the discharging side of the vibrating conveying assembly 31. After the potatoes are discharged from the vibrating conveying assembly 31, they can directly fall into the receiving cavity 321 from the feeding port 3211. The stirrer 322 is arranged in the receiving cavity 321. At least one mud leakage port 323 is opened at the bottom of the receiving cavity 321. While the stirrer 322 rotates, it can push the potatoes entering from the feeding port 3211 to the discharging port 3212, and then push them out of the receiving cavity 321 to realize discharging.

[0071] In some embodiments, the number of the mud leakage ports 323 is multiple, so as to avoid the accumulation and blockage of the soil in the receiving cavity 321.

[0072] In some embodiments, the accommodating cavity 321 can directly use a frame structure, and the gaps between the frame structures serve as the sludge leakage openings 323.

[0073] The number of agitators 322 is the same as that of the sludge leakage openings 323. When the agitator 322 rotates to the position of the sludge leakage opening 323, the part with a gap between the agitator 322 and the sludge leakage opening 323 is adapted to be fitted into the sludge leakage opening 323. The sludge leakage opening 323 can not only guide the rotation of the agitator 322 to prevent the agitator 322 from shaking, but also when the agitator 322 is fitted into the sludge leakage opening 323 during rotation, the gap formed between the agitator 322 and the sludge leakage opening 323 can have a certain effect of removing the roots and stems of the potatoes, thereby further improving the screening efficiency of the potatoes.

[0074] The number of agitators 322 is multiple. The agitators 322 are arranged at equal intervals from both sides of the accommodating cavity 321 towards the middle of the accommodating cavity 321 in the order of passing through the feed inlet 3211 and the discharge outlet 3212 from front to back. Such a design can guide the potatoes on both sides of the accommodating cavity 321 to the middle position of the accommodating cavity 321 during the agitation of the agitators 322, thereby realizing centralized discharging.

[0075] As Figures 12 to 13 shown in the embodiment, the digging mechanism 2 includes a digging frame 21. A plurality of shovels 22 arranged at equal intervals are provided on the digging frame 21. The front end of the shovel 22 has a flat and sharp outer shape, and chamfers 221 are provided on both sides. Adjacent shovels 22 can guide the potatoes through the chamfers 221, reducing the probability of the potatoes hanging on the shovels 22. The front end of the shovel 22 has a certain bending angle away from the ground direction, which can further improve the guiding effect of the potatoes and reduce the jamming during the digging process.

[0076] The above describes the basic principles, main features, and advantages of the present application. Those skilled in the art of this industry should understand that the present application is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present application. Without departing from the spirit and scope of the present application, the present application will have various changes and improvements, and these changes and improvements all fall within the scope of the present application claimed. The scope of protection claimed by the present application is defined by the appended claims and their equivalents.

Claims

1. A potato harvesting device, characterized in that: It includes a frame, a digging mechanism, a screening mechanism and a traveling mechanism. The screening mechanism is arranged on the frame, and the digging mechanism is arranged on the feeding side of the screening mechanism; The traveling mechanism includes a road wheel set and a crawler wheel set arranged at the bottom of the frame. The road wheel set is adapted to lift at least one side of the frame off the ground. The digging mechanism and the screening mechanism are arranged on the frame to cooperate with the road wheel set to form a stable center of gravity. The road wheel set is located between the digging mechanism and the stable center of gravity, and the crawler wheel set is located between the digging mechanism and the road wheel set. The digging mechanism and the crawler wheel set are adapted to be away from the ground when the frame is placed independently. Two first connection mechanisms are arranged on the frame. The first connection mechanism is adapted to connect auxiliary equipment to lower the digging mechanism and the crawler wheel set to the ground; One of the first connection mechanisms is arranged on the discharging side of the screening mechanism. The auxiliary equipment includes a harvesting hopper truck. A second connection mechanism is arranged on the harvesting hopper truck. The first connection mechanism is adapted to be fixedly connected with the second connection mechanism so that the harvesting hopper truck and the road wheel set support the frame on both sides of the stable center of gravity respectively; The first connection mechanism includes a connecting rod and a connection hole. The connection hole is opened on the frame between the connecting rod and the stable center of gravity. The second connection mechanism includes a connection hook groove and a connection pin. When the first connection mechanism is fixedly connected with the second connection mechanism, the connection hook groove is adapted to rotatably lift the connecting rod, and the connection pin is adapted to be inserted into the connection hole in a plugging manner; The traveling mechanism further includes a power mechanism connected to the crawler wheel set. A control mechanism is arranged on the frame. The control mechanism is adapted to be manually triggered or triggered in cooperation with the auxiliary equipment. The control mechanism includes a control switch and a sensor. The sensor is arranged in the connection hole, the control switch is arranged at one end of the connection hole, and the connection pin is adapted to be inserted into the connection hole from the other end. The control switch or the connection pin is adapted to trigger the sensor. When the control mechanism is triggered, the power mechanism is adapted to operate and engage with the road wheel set for transmission so that the power mechanism drives the road wheel set and the crawler wheel set simultaneously.

2. The potato harvesting device according to claim 1, characterized in that: The other first connection mechanism includes a connection hook buckle. The connection hook buckle is arranged on the feeding side of the screening mechanism. The auxiliary equipment includes a towing machine. The connection hook buckle is adapted to be connected with the towing machine.

3. The potato harvesting device according to claim 1, characterized in that: The crawler wheel set includes a crawler support and at least two movable wheels. The crawler support is movably connected with the frame. The movable wheels are arranged on the crawler support. The movable wheels are in transmission connection with the power mechanism. The movable wheels are arranged on both sides of the connection between the crawler support and the frame. A buffer assembly is arranged at the connection between the crawler support and the frame. The buffer assembly is adapted to make the movable wheels have a movement tendency towards the ground.

4. The potato harvesting device according to claim 1, characterized in that: The power mechanism includes a power source and a clutch. The clutch connects the power source and the road wheel set.

5. The potato harvesting device according to claim 1, characterized in that: The screening mechanism includes a vibrating conveying component, a stirring conveying component and a driver. The driver is connected to the vibrating conveying component and the stirring conveying component and drives them to operate. The vibrating conveying component is connected to the excavating mechanism and the stirring conveying component. The vibrating conveying component is adapted to vibrate and lift upward to convey the objects at the excavating mechanism to the stirring conveying component. At least one stirrer is arranged in the stirring conveying component, and the stirrer is adapted to rotate in a vertical plane in a direction away from the vibrating conveying component.

6. The potato harvesting device according to claim 5, characterized in that: The vibrating conveying component includes two conveyor belts arranged at equal intervals. A plurality of conveying rollers are distributed at equal intervals between the two conveyor belts along the conveying direction. At least one vibrator is arranged on the frame, and the vibrator is adapted to vibrate the conveyor belt. The stirring conveying component includes a containing cavity. Feeding ports and discharging ports are respectively formed on both sides of the containing cavity. The feeding port cooperates with the vibrating conveying component. The stirrer is arranged in the containing cavity, and at least one mud leakage port is formed at the bottom of the containing cavity. The number of the stirrers is the same as that of the mud leakage ports. When the stirrer rotates to the position of the mud leakage port, a part with a gap is adapted to be partially fitted into the mud leakage port. The number of the stirrers is multiple, and the stirrers are arranged at equal intervals from both sides of the containing cavity to the middle of the containing cavity in the order of passing through the feeding port and the discharging port successively from the front to the back.

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