Potato harvesting device

Abstract

The present invention discloses a potato harvesting device, which relates to the field of agricultural technology and includes a traction frame and a separation and conveying mechanism disposed on the traction frame. The residual film recovery mechanism is used to collect the separated residual film. The residual film recovery mechanism includes a transmission shaft rotatably disposed on the traction frame and a film roller slidably disposed on the transmission shaft, wherein both the film roller and the transmission shaft are provided with spikes. The device also includes a first power assembly, which is used to drive the film roller to move axially along the transmission shaft when the film roller rotates. The potato harvesting device provided by the present invention drives the film roller to move axially along the transmission shaft when the film roller rotates. When the film roller moves axially along the transmission shaft, it drives the spikes to move synchronously, thereby increasing the contact area between the spikes and the residual film, thereby minimizing the problem of residual film leakage.

Description

Technical Field

[0001] The invention relates to the technical field of agriculture, and in particular to a potato harvesting device. Background Art

[0002] Potatoes, also known as potatoes, are a widely cultivated and edible root crop. Rich in starch, vitamin C, B vitamins, and minerals, potatoes are nutritionally valuable and have become a major global food crop. However, during cultivation, potatoes are covered with film. However, when harvested, film residue remains in the soil, potentially causing contamination.

[0003] For example, the Chinese patent document with authorization announcement number CN206895217U, announcement date 2018-01-19, and titled "Combined Machine for Potato Harvesting and Residual Film Recycling" adopts a new mechanism, namely, through a two-stage conveying mechanism, the potatoes move in the lower layer of the first-stage conveying and shaking mechanism, and the straw and ground film move in the upper layer of the first-stage conveying and shaking mechanism. After the first-stage conveying is completed, the potatoes fall down after being conveyed through the shaking mechanism, and the straw and ground film move upward along the second-stage conveying mechanism. The ground film is collected by the film collection device, and the straw is thrown back to the field. Since the straw falls to the ground behind the potatoes, it avoids burying the straw underground and interfering with the picking of potatoes. At the same time, separating the ground film, straw, and potato mixture is conducive to the conveying and shaking device to better separate potatoes from the soil and recycle residual film. This utility model has a moderate size, light weight, simple and sophisticated hierarchical structure, is convenient and flexible, and improves work efficiency.

[0004] It is achieved by arranging spikes on the film rolling roller. The rotation of the film roll drives the spikes to rotate synchronously around the central axis of the film rolling roller, so that the spikes can penetrate into the residual film. As the film rolling roller rotates, the residual film is rolled onto the film rolling roller to achieve the recovery of the residual film.

[0005] The shortcomings of the above-mentioned existing technologies are that the spikes are fixedly mounted on the film roll, and since there are gaps between the spikes, residual film can easily pass through the gaps between the spikes (it should be noted that the gaps between the spikes can be reduced by increasing the number of spikes, but this will increase the difficulty of subsequently removing the residual film from the film roll), which can easily cause the residual film to be missed and require manual separation of the residual film from the potatoes, reducing the efficiency of potato harvesting. Summary of the Invention

[0006] The object of the present invention is to provide a potato harvesting device to solve the above-mentioned deficiencies in the prior art.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] A potato harvesting device comprises a traction frame and a separation and conveying mechanism arranged on the traction frame, the separation and conveying mechanism is used to transport potatoes and residual film, and separate the potatoes and residual film from each other during the transportation process, the residual film recovery mechanism is used to collect the separated residual film, the residual film recovery mechanism comprises a transmission shaft rotatably arranged on the traction frame and a film rolling roller slidably arranged on the transmission shaft, the film rolling roller and the transmission shaft are both provided with spike teeth;

[0009] It also includes a first power assembly, which is used to drive the film rolling roller to move along the axial direction of the transmission shaft when the film rolling roller rotates.

[0010] In the above-mentioned potato harvesting device, a cleaning brush is rotatably provided on the traction frame.

[0011] In the above-mentioned potato harvesting device, the surface of the film rolling roller is arranged obliquely.

[0012] In the above-mentioned potato harvesting device, a limit bar is provided on the transmission shaft, a limit groove is provided on the film rolling roller, and the limit bar is slidably connected to the limit groove.

[0013] In the above-mentioned potato harvesting device, the first power assembly includes a transmission barrel arranged on the traction frame, a transmission groove is opened inside the transmission barrel, and a transmission rod is provided on the film rolling roller, and the transmission rod is slidably connected to the transmission groove.

[0014] In the above-mentioned potato harvesting device, a pressure plate is provided on the film rolling roller.

[0015] In the above-mentioned potato harvesting device, the transmission barrel is slidably arranged on the traction frame, and a first spring is arranged between the transmission barrel and the traction frame.

[0016] In the above-mentioned potato harvesting device, a rotating seat is provided on the spike teeth, a rotating groove is provided on the film rolling roller, and the rotating seat is rotatably connected to the rotating groove;

[0017] A second power assembly is provided between the film rolling roller and the transmission shaft. When the film rolling roller moves along the transmission shaft, the second power assembly drives the spikes to swing in the direction of movement of the film rolling roller.

[0018] In the above-mentioned potato harvesting device, the second power component includes a mounting plate fixedly connected to the rotating seat, an abutment rod is rotatably arranged on the mounting plate, and a torsion spring is arranged between the abutment rod and the mounting plate, an avoidance groove is provided on the limit bar, and the limit bar and the avoidance groove are both located on the movement range of the abutment rod.

[0019] In the above-mentioned potato harvesting device, a film guide plate is provided on the traction frame, a film guide wheel is rotatably provided on the traction frame, and the film guide wheel is arranged corresponding to the film guide plate.

[0020] In the above technical solution, the present invention provides a potato harvesting device, in which a film rolling roller is arranged to slide along the axial direction of the transmission shaft, and spike teeth are provided on the film rolling roller, and a first power component is provided for the film rolling roller, which is used to drive the film rolling roller to move along the axial direction of the transmission shaft when the film rolling roller rotates. When the film rolling roller moves along the axial direction of the transmission shaft, it will drive the spike teeth to move synchronously, thereby increasing the contact area between the spike teeth and the residual film, so as to minimize the problem of residual film leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0022] Figure 1 A schematic diagram of the overall structure provided by an embodiment of the present invention;

[0023] Figure 2 A schematic side view of the structure provided by an embodiment of the present invention;

[0024] Figure 3 A schematic diagram of the front structure provided by an embodiment of the present invention;

[0025] Figure 4 A schematic diagram of a residual film recovery mechanism provided in an embodiment of the present invention;

[0026] Figure 5 A schematic cross-sectional view of a transmission barrel according to an embodiment of the present invention;

[0027] Figure 6 A schematic diagram of a residual film recovery mechanism provided in another embodiment of the present invention;

[0028] Figure 7 A schematic cross-sectional view of a residual film recovery mechanism according to another embodiment of the present invention;

[0029] Figure 8 for Figure 1 A magnified schematic diagram of the local structure at center A;

[0030] Figure 9 for Figure 7 An enlarged schematic diagram of the local structure at point B in the middle (i.e., a schematic diagram of the structure when the abutment rod is in the first state);

[0031] Figure 10A schematic structural diagram of another embodiment of the present invention is provided when the abutment rod is in a second state;

[0032] Figure 11 A schematic structural diagram of another embodiment of the present invention is provided when the abutment rod is in a third state;

[0033] Figure 12 A schematic structural diagram of another embodiment of the present invention is provided when the abutment rod is in a fourth state;

[0034] Figure 13 Another embodiment of the present invention provides Figure 7 A magnified schematic diagram of the local structure at point C in the middle;

[0035] Figure 14 A schematic diagram of a partial structure provided for yet another embodiment of the present invention.

[0036] Description of reference numerals:

[0037] 1. Traction frame; 2. Separation and conveying mechanism; 3. Drive shaft; 4. Film rolling roller; 5. Spike teeth; 6. Push rod; 7. Cleaning brush; 8. Limiting strip; 9. Limiting groove; 10. Transmission barrel; 11. Transmission rod; 12. Extension part; 13. Pressing plate; 14. First spring; 15. Protruding part; 16. Rotating seat; 17. Rotating groove; 18. Rotating shaft; 19. Mounting plate; 20. Abutting rod; 21. Avoiding groove; 22. Through hole; 23. Film guide plate; 24. Film guide wheel; 25. Second spring; 26. Locking rod; 27. Movable groove; 28. Locking groove; 29. ​​Triangular part; 30. Triangular groove; 31. Transmission groove. DETAILED DESCRIPTION

[0038] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0039] In the description of the present invention, it is to be understood that Figure 13 The position of the first spring 14 relative to the traction frame 1 is on the left, and vice versa. The terms "center", "longitudinal", "lateral", "length", "width", "degree", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they should not be understood as limiting the present invention.

[0040] Reference Figure 1-14A potato harvesting device provided by an embodiment of the present invention includes a traction frame 1 and a separation and conveying mechanism 2 arranged on the traction frame 1, the separation and conveying mechanism 2 is used to transport potatoes and residual film, and separate the potatoes and residual film from each other during the transportation process, the residual film recovery mechanism is used to collect the separated residual film, the residual film recovery mechanism includes a transmission shaft 3 rotatably arranged on the traction frame 1 and a film rolling roller 4 slidably arranged on the transmission shaft 3, and spike teeth 5 are provided on the film rolling roller 4 and the transmission shaft 3; it also includes a first power component, which is used to drive the film rolling roller 4 to move along the axial direction of the transmission shaft 3 when the film rolling roller 4 rotates.

[0041] Specifically, the traction frame 1 is provided with wheels, which are connected to the traction vehicle, and the traction frame 1 can be driven by the traction vehicle to walk in the planting area. The separation and conveying mechanism 2 is tilted on the traction frame 1, and there is a gap inside it for soil to fall, and a push rod 6 is provided on the surface. The push rod 6 protrudes from the surface of the separation and conveying mechanism 2. When harvesting potatoes, the soil, potatoes and residual film are scooped up together by the shoveling device, and then transported to the separation and conveying mechanism 2. The soil will fall from the gap, and the potatoes will enter the space between adjacent push rods 6, and finally enter the end of the separation and conveying mechanism 2. In the collecting device, due to the long length of the residual film, it will be suspended on the push rod 6, and then the film roller 4 drives the spike teeth 5 to rotate, so that the spike teeth 5 pierce the residual film, and as the spike teeth 5 rotate, the residual film is rolled up onto the film roller 4 to achieve the recovery of the residual film. This is the existing technology and will not be described in detail. For details, please refer to the patent document with authorization announcement number CN206895217U. One of the core innovations of the embodiment of the present invention is that there are two film rollers 4, both of which are slidably set on the transmission shaft 3, and the two are connected in the form of non-rotating bodies, that is, there is no gap between the film roller 4 and the transmission shaft 3. For relative rotation, there are preferably three spike teeth 5, one of which (hereinafter referred to as the first spike tooth) is arranged on the outer circumference of the transmission shaft 3, and the other two spike teeth 5 (hereinafter referred to as the second spike teeth) are respectively arranged on the outer circumferences of the two film-rolling rollers 4. The first power component can be an existing reciprocating drive component such as a cylinder. The purpose of such a setting is that when the residual film is recovered, the transmission shaft 3 is driven to rotate by direct drive (that is, directly connected to the transmission shaft 3 by the motor) or indirect drive (that is, the transmission shaft 3 is driven to rotate by a transmission structure such as a chain), thereby driving the film-rolling roller 4 to rotate synchronously. 4 rotates, the film winding roller 4 is driven by the first power assembly to move along the axial direction of the transmission shaft 3. When the film winding roller 4 moves along the axial direction of the transmission shaft 3, it will drive the second spike teeth to move synchronously. The advantages brought by this are: first, the contact area between the second spike teeth and the residual film can be increased to avoid the problem of residual film leakage as much as possible; second, in the process of the second spike teeth reciprocating along the transmission shaft 3, a horizontal tearing effect will be generated on the holes punctured on the residual film, making the size of the holes larger and the force between the second spike teeth and the residual film smaller, so that the residual film can be easily removed from the second spike teeth.

[0042] Preferably, a cleaning brush 7 is rotatably provided on the traction frame 1. Specifically, there are multiple cleaning brushes 7, and the multiple cleaning brushes 7 are all located on the transport path of the potatoes. During the transportation of the potatoes, the cleaning brushes 7 are driven to rotate by a driving force such as a motor to clean the dirt on the surface of the potatoes.

[0043] Preferably, the surface of the film rolling roller 4 is arranged at an angle. Specifically, the film rolling roller 4 is approximately truncated cone-shaped, and the area of ​​the end close to the first spike is smaller than the area of ​​the end away from the first spike. That is, the ends of the two film rolling rollers 4 close to each other are concave toward the central axis of the transmission shaft 3. In this way, the residual film is accumulated as much as possible in the position between the two film rolling rollers 4, so as to avoid the residual film from being wrapped around the traction frame 1.

[0044] Preferably, a limit strip 8 is provided on the transmission shaft 3, and a limit groove 9 is provided on the film rolling roller 4, and the limit strip 8 is slidably connected to the limit groove 9. Specifically, the limit strip 8 is provided on the outer circumferential surface of the transmission shaft 3, and the limit groove 9 is provided on the inner circumferential surface of the film rolling roller 4, and the length of the limit groove 9 is greater than the length of the limit strip 8. The effect of such a setting is that, under the action of the sliding connection between the limit strip 8 and the limit groove 9, the film rolling roller 4 and the transmission shaft 3 will not rotate relative to each other, and because the length of the limit groove 9 is greater than the length of the limit strip 8, space can be provided for the film rolling roller 4 to slide axially along the transmission shaft 3.

[0045] As an alternative to the above-mentioned cylinder driving the film roller 4 to move back and forth, preferably, the first power assembly includes a transmission barrel 10 provided on the traction frame 1, a transmission groove 31 is provided inside the transmission barrel 10, and a transmission rod 11 is provided on the film roller 4, and the transmission rod 11 is slidably connected to the transmission groove 31. Specifically, the transmission barrel 10 can be fixed to the traction frame 1, and the transmission groove 31 is provided on the inner circumference of the transmission barrel 10 and is wavy, that is, it includes multiple crests and multiple troughs, and the directions of the crests (which are located at the end close to the first spike) and the troughs (which are located at the end away from the first spike) are arranged along the axial direction of the transmission shaft 3. The transmission rod 11 is preferably a cylindrical rod, and an extension portion 12 is provided at the end of the film roller 4. The transmission rod 11 is fixed to the outer circumference of the extension portion 12. The purpose of such a setting is that during the rotation of the transmission shaft 3, the film roller 4 will be driven synchronously. Rotation, thereby driving the transmission rod 11 to rotate around the central axis of the transmission shaft 3, at this time the transmission rod 11 will slide along the transmission groove 31, when the transmission rod 11 slides from the position of the trough to the position of the peak, it will drive the film roller 4 to move toward the direction of the first spike tooth, when the transmission rod 11 slides from the position of the peak to the position of the trough, it will drive the film roller 4 to move away from the first spike tooth, in this way, during the rotation of the transmission shaft 3, the film roller 4 is driven to move back and forth passively horizontally, and because the second spike tooth is fixed to the film roller 4, it can drive the second spike tooth to move back and forth horizontally.

[0046] Furthermore, a pressure plate 13 is provided on the film roll 4. Specifically, the pressure plate 13 is approximately cylindrical and is fixed to the end of the film roll 4 away from the first spike. The purpose of such a configuration is that when the film roll 4 moves toward the first spike, the pressure plate 13 will be driven to move synchronously, during which the pressure plate 13 will squeeze the residual film on the film roll 4, so that the residual film on the film roll 4 is pressed from both sides, making the residual film on the film roll 4 more compact, thereby accommodating more residual film, thereby reducing the frequency of cleaning the residual film on the film roll 4, and in the process of the pressure plate 13 moving toward the first spike, its circumferential surface can fill the gap between it and the traction frame 1 to prevent impurities from entering.

[0047] As another embodiment of the present invention, the transmission barrel 10 is slidably arranged on the traction frame 1, and a first spring 14 is arranged between the transmission barrel 10 and the traction frame 1. Specifically, in this embodiment, a sliding hole is opened on the traction frame 1, and the transmission barrel 10 is slidably arranged in the sliding hole, and a limiting structure such as a protrusion is provided between the two to prevent the two from rotating relative to each other, and the end of the transmission barrel 10 has a protrusion 15, one end of the first spring 14 is fixedly connected to the side wall of the traction frame 1, and the other end is fixedly connected to the protrusion 15 on the transmission barrel 10. The effect of such a setting is that when the transmission rod 11 moves from the trough to the peak of the transmission groove 31, if the force required for the reciprocating movement of the film roller 4 and the pressure plate 13 is less than the force required for the deformation of the first spring 14, the transmission rod 11 will slide normally inside the transmission groove 31. When the two When there is too much residual film between the pressure plates 13, so that the pressure plates 13 cannot move the complete distance from the trough to the peak in the direction of the first nail tooth, the force provided by the transmission groove 31 on the transmission rod 11 will not cause the film roller 4 to move horizontally, and under the action of the reaction force provided by the transmission rod 11, the transmission barrel 10 slides toward the traction frame 1 to adapt to the horizontal distance generated by the relative movement of the transmission rod 11 and the transmission groove 31, and accumulates force in the first spring 14 to avoid the transmission shaft 3 from getting stuck as much as possible. When the transmission rod 11 moves from the peak to the trough of the transmission groove 31, the elastic force of the first spring 14 is released to drive the transmission barrel 10 to automatically reset.

[0048] Preferably, a rotating seat 16 is provided on the spike tooth 5 (for the second spike tooth), a rotating groove 17 is provided on the film rolling roller 4, and the rotating seat 16 is rotatably connected to the rotating groove 17; a second power component is provided between the film rolling roller 4 and the transmission shaft 3, and when the film rolling roller 4 moves along the transmission shaft 3, the second power component drives the spike tooth 5 to swing in the direction of movement of the film rolling roller 4. Specifically, the second spike is fixed to the rotating seat 16, and the rotating seat 16 is preferably of a hemispherical structure, and a rotating shaft 18 is provided inside the rotating seat 16, and a rotating hole is opened inside the rotating groove 17, and the rotating shaft 18 is rotatably connected to the rotating hole. The second power component can be an existing structure that provides rotational force such as a motor. The purpose of such a setting is that when the first power component drives the film rolling roller 4 to move in the direction close to the first spike, the second power component is used to control the rotating seat 16 to rotate in the direction of the first spike, so that the second spike is tilted in the direction of the first spike. When residual film passes through the gap between the first and second spikes, the second spike will be inserted from the side of the residual film, so that the probability of the second spike contacting the residual film during the horizontal movement can be increased, thereby further reducing the leakage recovery rate of the residual film. Conversely, when the film rolling roller 4 moves in the direction away from the first spike, the second power component is used to control the rotating seat 16 to rotate in the direction away from the first spike, which can also increase the probability of the spike 5 contacting the residual film.

[0049] As an alternative to the above-mentioned motor driving the rotating seat 16 to rotate, the second power assembly includes a mounting plate 19 fixed to the rotating seat 16, an abutment rod 20 is rotatably provided on the mounting plate 19, and a torsion spring is provided between the abutment rod 20 and the mounting plate 19, and an avoidance groove 21 is provided on the limit bar 8, and the limit bar 8 and the avoidance groove 21 are both located on the movement stroke of the abutment rod 20. Specifically, the mounting plate 19 is fixed to the surface of the rotating seat 16 away from the second nail teeth, and two through holes 22 are provided inside it, and there are two abutment rods 20, and the two abutment rods 20 are rotatably provided inside the two through holes 22 respectively, and the torsion spring is provided between the abutment rod 20 and the through holes 22, and the elastic force of the torsion spring makes the abutment rod 20 have a tendency to rotate away from the through holes 22, and the surface of the limit bar 8 away from the central axis of the transmission shaft 3 is provided with an avoidance groove 21, and the avoidance groove 21 is provided with an arc surface and a right-angle surface, such as Figure 9-12As shown, when the left abutment rod 20 abuts the left end of the limit strip 8, it is the first state of the abutment rod 20, when the end of the left abutment rod 20 abuts the surface of the limit strip 8, it is the second state of the abutment rod 20, when the left abutment rod 20 enters the inside of the avoidance groove 21 on the right, it is the third state of the abutment rod 20, and when the right abutment rod 20 abuts the right end of the limit strip 8, it is the fourth state of the abutment rod 20. The effect of such a setting is that when the film roller 4 is located at a position away from the first spike tooth, the abutment rod 20 is in the first state. At this time, the left abutment rod 20 cannot rotate in the direction away from the through hole 22 under the effect of abutment of the side wall of the through hole 22, and the transmission rod 11 is slidably connected to the transmission groove 31. Under the action of the action, the film rolling roller 4 will be driven to move in the direction close to the first nail tooth. At this time, the abutment rod 20 will abut against the left end of the limit strip 8, thereby driving the rotating seat 16 to rotate counterclockwise, that is, to rotate in the direction close to the first nail tooth, so as to switch the abutment rod 20 from the first state to the second state. At this time, the end of the mounting plate 19 abuts against the inner wall of the rotating groove 17, and the end of the left abutment rod 20 abuts against the surface of the limit strip 8, and under the action of the abutment rod 20 and the mounting plate 19 jointly limiting, the rotating seat 16 maintains this angle and slides horizontally in the direction of the first nail tooth. In this process, the abutment rod 20 on the right slides out of the avoidance groove 21 and further stores force on the torsion spring. When the film rolling roller 4 continues to move, it will The abutment rod 20 is switched from the second state to the third state. At this time, the abutment rod 20 on the left side enters the inside of the avoidance groove 21 on the right side, and the abutment rod 20 on the right side moves to the right side of the limit strip 8. At this time, the elastic force of the torsion spring is released, causing the abutment rod 20 on the right side to abut against the surface of the transmission shaft 3 (at this time, the abutment rod 20 on the left side abuts against the inner wall of the avoidance groove 21 on the right side). When the film roller 4 moves in the opposite direction, the abutment rod 20 will be switched from the third state to the fourth state. When the film roller 4 moves in the direction away from the first spike, the abutment rod 20 on the right side abuts against the right end of the limit strip 8 to drive the rotating seat 16 to rotate clockwise, that is, to rotate in the direction away from the first spike. In the subsequent movement process, the right side will The abutment rod 20 abuts against the surface of the limit strip 8. At this time, the right end of the mounting plate 19 abuts against the inner wall of the rotating groove 17. Under the joint limiting action of the right abutment rod 20 and the mounting plate 19, the rotating seat 16 will be maintained at this angle (in this process, the abutment rod 20 on the left abuts against the arc surface of the avoidance groove 21, so that the left abutment rod 20 rotates clockwise and stores force on the torsion spring). Similarly, during the horizontal movement of the film roller 4, the second spike tooth can be driven to move horizontally while passively rotating in the direction of movement. In this process, the limit strip 8 has the following advantages: first, it prevents the transmission shaft 3 and the film roller 4 from rotating relative to each other; second, it contacts the abutment rod 20 to drive the second spike tooth to rotate.

[0050] It should be noted that, as for the abutment rod 20 on the left, when it moves to the right, it will enter the avoidance groove 21 on the left. At this time, the abutment force between the abutment rod 20 and the surface of the limit strip 8 will disappear, causing the second nail tooth to swing slightly. Since this process is short, the impact on the entire movement process is negligible and can be ignored.

[0051] Furthermore, the traction frame 1 is provided with a film guide plate 23, and a film guide wheel 24 is rotatably provided on the traction frame 1, and the film guide wheel 24 is arranged corresponding to the film guide plate 23. Specifically, the film guide plate 23 is fixed to the traction frame 1, and is also arranged obliquely. It can be provided with multiple, and multiple groups of the same film guide wheels 24 are provided, and the multiple groups of film guide wheels 24 are respectively arranged corresponding to the multiple film guide plates 23. The film guide wheel 24 is rotatably provided on the traction frame 1, and there is a gap between the film guide wheel 24 and the film guide plate 23 for residual film to pass through. The effect of such a setting is that when the push rod 6 moves to the position of the film guide plate 23, the residual film on the push rod 6 will move to the surface of the film guide plate 23, and then the rotating film guide wheel 24 can assist in transporting the residual film to a position where the spike teeth 5 can reach, and then under the action of the rotation of the spike teeth 5, the residual film can be collected on the film roll 4.

[0052] As another embodiment of the present invention, the transmission rod 11 is slidably arranged on the transmission barrel 10, and a second spring 25 is provided between the transmission rod 11 and the transmission barrel 10. The transmission groove 31 is provided on the extension portion 12. A locking rod 26 is slidably provided on the transmission barrel 10. The locking rod 26 has a first state in which it is plugged into the transmission rod 11 and a second state in which it is away from the transmission rod 11. Specifically, a movable groove 27 is provided on the inner circumference of the transmission barrel 10. The transmission rod 11 is slidably connected to the movable groove 27. The second spring 25 is provided between the transmission rod 11 and the movable groove 27. The locking rod 26 is U-shaped and is slidably arranged on the transmission barrel 10. A locking groove 28 is provided inside the transmission rod 11. A triangular portion 29 is provided on one end of the locking rod 26 close to the movable groove 27. A triangular groove 30 is provided inside the locking groove 28 to match the triangular portion 29. When the locking rod 26 is in the first state, one end of the locking rod 26 is plugged into the locking groove 28, and the triangular portion 29 is also aligned with the triangular groove 28. 30 abuts, and in this state the second spring 25 is in a stretched state. When the locking rod 26 is in the second state, the end of the locking rod 26 is pulled out of the locking groove 28. The effect of such a setting is that when the residual film recovery mechanism operates normally, the locking rod 26 is in the first state. At this time, the triangular portion 29 is inserted into the triangular groove 30. Under the action of the elastic force of the second spring 25, the locking rod 26 can be flexibly fixed in this state, and at this time the transmission rod 11 is inserted into the transmission groove 31. Under the action of the sliding connection between the transmission rod 11 and the transmission groove 31, the pressure plate 13, the film roller 4 and The second spike moves back and forth. When there is too much residual film between the two pressure plates 13 so that the pressure plate 13 cannot move, it will drive the transmission barrel 10 to slide along the thickness direction of the traction frame 1 and store force on the first spring 14. When the first spring 14 is compressed too much (at this time, the force overcome by the first power component driving the film roller 4 and the second spike to move back and forth will become larger, that is, at this time, the first power component should no longer drive the film roller 4 to move back and forth), the end of the locking rod 26 away from the movable groove 27 will abut against the side wall of the traction frame 1, so that the locking rod 26 cannot continue to move. During the subsequent movement, the triangular portion 29 will be brought into contact with the triangular groove 30, causing the transmission rod 11 to move a short distance toward the inside of the transmission groove 31 to avoid the rotation. When the transmission rod 11 switches from the first state to the second state, that is, when the locking rod 26 is completely withdrawn from the locking groove 28, the elastic force of the second spring 25 is released, driving the transmission rod 11 to be withdrawn from the transmission groove 31. At this time, the connection between the extension portion 12 and the transmission barrel 10 disappears. Therefore, during the subsequent rotation of the film winding roller 4, it will no longer reciprocate, thereby passively reducing the resistance of the film winding roller 4 during rotation.

[0053] It should be noted that a reset rod can be provided on the transmission rod 11, which passes through the side wall of the transmission. When the residual film is recovered, the reset rod provides the transmission rod 11 with a force away from the movable groove 27, and then the locking rod 26 is inserted into the locking groove 28 again to complete the reset of the transmission rod 11.

[0054] To sum up, the transmission shaft 3 has the following strokes in the process of driving the film roller 4 to rotate: first, when driving the film roller 4 and the second spike tooth to move back and forth, the contact area between the second spike tooth and the residual film can be increased to avoid the problem of residual film leakage as much as possible; moreover, in the process of the second spike tooth moving back and forth along the transmission shaft 3, a horizontal tearing effect will be produced on the holes punctured on the residual film, so as to facilitate the removal of the residual film from the second spike tooth; second, in the process of the reciprocating movement of the second spike tooth, it drives itself to swing synchronously so that the second spike tooth can be inserted from the side of the residual film; third, it drives the transmission barrel 10 to move back and forth to avoid the transmission shaft 3 from getting stuck; fourth, it drives the transmission rod 11 to be pulled out of the transmission groove 31 to reduce the resistance during the rotation of the film roller 4.

[0055] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims.

Claims

1. A potato harvester, comprising a traction frame and a separation and conveying mechanism arranged on the traction frame, the separation and conveying mechanism being used to transport potatoes and residual film, and to separate the potatoes and residual film from each other during the transportation process, and the residual film recovery mechanism being used to collect the separated residual film, the residual film recovery mechanism comprising a transmission shaft rotatably arranged on the traction frame and two film winding rollers slidably arranged on both ends of the transmission shaft, the two being connected in the form of a non-rotating body, the outer circumference of each film winding roller being provided with a second spike tooth, and the outer circumference of the transmission shaft being provided with a first spike tooth; It is characterized by: It also includes a first power assembly, which is used to drive the film rolling roller to reciprocate along the axial direction of the transmission shaft when the film rolling roller rotates, so as to drive the second spike teeth to reciprocate synchronously.

2. A potato harvesting device according to claim 1, characterized in that: A cleaning brush is rotatably provided on the traction frame, and a plurality of cleaning brushes are all located on the transporting path of the potatoes.

3. A potato harvesting device according to claim 1, characterized in that: The surface of the film rolling roller is arranged obliquely, and the area of ​​the end close to the first spike tooth is smaller than the area of ​​the end away from the first spike tooth.

4. A potato harvesting device according to claim 1, characterized in that: A limiting strip is provided on the transmission shaft, and a limiting groove is provided on the film rolling roller. The length of the limiting groove is greater than the length of the limiting strip, and the limiting strip is slidably connected to the limiting groove.

5. A potato harvesting device according to claim 4, characterized in that: The first power assembly includes a transmission barrel arranged on the traction frame, a transmission groove is opened inside the transmission barrel, and the transmission groove is wavy. A transmission rod is provided on the film rolling roller, and the transmission rod is slidably connected to the transmission groove; when the transmission rod slides from the position of the trough to the position of the crest, it will drive the film rolling roller to move toward the direction of the first spike tooth, and when the transmission rod slides from the position of the crest to the position of the trough, it will drive the film rolling roller to move in the direction away from the first spike tooth.

6. A potato harvesting device according to claim 5, characterized in that: The film rolling roller is provided with a pressing plate which is fixed to one end of the film rolling roller away from the first spike teeth.

7. A potato harvesting device according to claim 5, characterized in that: The transmission barrel is slidably arranged on the traction frame, and a first spring is arranged between the transmission barrel and the traction frame.

8. A potato harvesting device according to claim 5, characterized in that: A rotating seat is provided on the nail teeth, a rotating groove is provided on the film rolling roller, and the rotating seat is rotatably connected to the rotating groove; A second power assembly is provided between the film rolling roller and the transmission shaft. When the film rolling roller moves along the transmission shaft, the second power assembly drives the spikes to swing in the direction of movement of the film rolling roller.

9. A potato harvesting device according to claim 8, characterized in that: The cam is secured to the second end of the guide rail and is adapted to engage the second end of the guide rail when the cam is engaged with the second end of the guide rail.

10. A potato harvesting device according to claim 1, characterized in that: A film guide plate is provided on the traction frame, and a film guide wheel is rotatably provided on the traction frame, and the film guide wheel is arranged corresponding to the film guide plate.

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