A pre-tightening auxiliary connection structure and a potato harvester having the same structure

Abstract

This invention relates to the field of potato harvesting technology, specifically a pre-tensioning auxiliary connection structure and a potato harvester having this structure, comprising: a frame structure formed by two sets of connecting frames rotatably connected; two sets of first guide rollers respectively installed on the connecting frames, with a second guide roller between each set of first guide rollers, and a tension roller between each set of second guide rollers; a conveyor belt sleeved between the first guide rollers, the second guide rollers, and the tension rollers; a dividing component, disposed on the connecting frames and connected to a connecting plate, which, when the two sets of connecting frames rotate, positions the connecting plate on the centerline of the angle formed by the two sets of connecting frames; and a traction component connecting the two sets of tension rollers and the dividing component, which, when the two sets of connecting frames rotate, drives the two sets of tension rollers to deflect, improving the integration of the equipment.

Description

Technical Field

[0001] This invention relates to the field of potato harvesting technology, specifically a pre-tightening auxiliary connection structure and a potato harvester having the structure. Background Technology

[0002] Potatoes are root vegetables, and when they are planted, the whole potato is usually cut into multiple pieces, and each piece can grow into a plant.

[0003] Therefore, potatoes need to be cut into pieces when they are planted. The raw material for cutting into pieces is fresh potatoes. These fresh potatoes are harvested by harvesters and then transported twice before being cut into pieces. During the secondary transportation process, in order to improve transportation efficiency, the potatoes are usually stacked in the cargo container, which causes the upper layer of potatoes to exert pressure on the lower layer of potatoes, which can easily lead to the lower layer of potatoes being crushed and damaged.

[0004] Connecting potato harvesters with seed cutters to form a harvesting and seed cutting production line can solve the above problems well. However, after the potato harvester finishes harvesting, it needs to use a belt conveyor for transportation. The belt conveyor can only complete straight-line transportation, which makes it very difficult to establish the above-mentioned harvesting and seed cutting production line. Summary of the Invention

[0005] The purpose of this invention is to provide a pre-tightening auxiliary connection structure and a potato harvester having the structure, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A pre-tightening auxiliary connection structure, comprising:

[0008] The frame structure is formed by two sets of connecting frames, which respectively connect the harvester and the seed cutter. The two sets of connecting frames are rotatably connected.

[0009] Two sets of guide rollers are provided and installed on the connecting structure respectively. A set of guide rollers is provided between each set of guide rollers. A tension roller is provided between each set of guide rollers. A conveyor belt is sleeved between the guide rollers, the guide rollers, and the tension roller.

[0010] An equal-division component is disposed on the connecting structure and connected to a connecting plate. The equal-division component is able to position the connecting plate on the midline of the angle formed by the two sets of connecting structures when the two sets of connecting structures rotate.

[0011] The traction assembly connects the two sets of tension rollers and the dividing assembly. The traction assembly enables the two sets of tension rollers to be parallel, and when the two sets of connecting structures rotate, the traction assembly can drive the two sets of tension rollers to deflect.

[0012] As a further aspect of the present invention: the connecting structure includes a bracket with a "U" shaped structure, and two telescopic rods are slidably mounted at the ends of the bracket, and the two sets of telescopic rods on the connecting structure are rotatably connected;

[0013] The connection structure also includes two rotatably connected traction rods, which are connected to the bracket, and one of the traction rods has an annular groove on its shaft, and a collar formed on the connection plate is rotatably connected to the annular groove.

[0014] As a further embodiment of the present invention: the equal division component includes a first sliding groove arranged along the length direction of the connecting plate, a first slider slidably installed in the first sliding groove, two coaxial grooved wheels rotatably installed on the first slider, and the first slider is rotatably connected to the traction component.

[0015] The equal-division component also includes two follower rods arranged crosswise on the two traction rods. Each follower rod has a drive groove along its length, and the two grooved wheels are respectively rolled within the drive groove.

[0016] As a further embodiment of the present invention: each of the two sets of tension rollers is rotatably connected to two vertical plates, a connecting sleeve is fixedly installed on the side of the vertical plate, a vertical rod is slidably installed inside the connecting sleeve, and a sliding sleeve plate slidably disposed on the connecting plate is fixedly connected to the vertical rod.

[0017] A connecting plate is also installed on the connecting plate, and the connecting plate is rotatably connected to the second guide roller.

[0018] As a further embodiment of the present invention: the traction assembly includes a hinged rod rotatably connected to the two upright plates, the middle part of the hinged rod is rotatably connected to the traction rod, and a traction plate is fixedly installed on the hinged rod;

[0019] The traction assembly also includes a pulley rotatably connected to the first slider, the pulley being able to roll within an inclined groove formed in the traction plate.

[0020] As a further aspect of the present invention, it also includes:

[0021] The abutment roller is rotatably mounted on one of the sets of brackets;

[0022] Two sets of elastic abutment components are provided and installed on the upper part of the conveyor belt. A grinding wheel is rotatably installed on one end of the elastic abutment component facing the conveyor belt, and the side of the grinding wheel opposite to the direction of movement of the conveyor belt is deflected toward the middle of the conveyor belt.

[0023] A connecting component connects the elastic abutment component and the upright plate. The connecting component is capable of abutting the conveyor belt with a grinding wheel located inside the angle formed by the two sets of connecting structures when the two sets of connecting structures deflect.

[0024] As a further embodiment of the present invention: the connecting component includes two guide sleeves fixedly installed on the bracket, a lifting member is slidably installed between the two guide sleeves, the upper end of the lifting member is connected to the elastic abutment component, and the lower end forms a sliding connection portion;

[0025] The connecting assembly also includes a side plate fixedly connected to the upright plate. A second sliding groove is provided on the side plate, and a second slider is slidably installed in the second sliding groove. A horizontal rod that is slidably connected to the sliding connection part is rotatably installed on the second slider.

[0026] As a further embodiment of the present invention: the elastic abutment component includes a hysteresis sleeve fixedly connected to the lifting component, a telescopic shaft slidably installed inside the hysteresis sleeve, the telescopic shaft being rotatably connected to the grinding wheel, and a limit ring being formed on the telescopic shaft;

[0027] A spring is also fitted on the telescopic shaft. One end of the spring is connected to the limiting ring, and the other end is connected to the inner wall of the hysteresis sleeve.

[0028] As a further embodiment of the present invention: a limiting block is provided on the hysteresis sleeve, and the limiting block slides in conjunction with a limiting groove provided along the length direction of the telescopic shaft.

[0029] A potato harvester includes the aforementioned pre-tightening auxiliary connection structure.

[0030] Compared with the prior art, the beneficial effects of the present invention are:

[0031] By using the equal-division and tensioning components, when the potato harvester turns and causes a change in the angle between the two traction rods, the tensioning roller can tighten the side of the conveyor belt that is curled by deflection and release the side of the conveyor belt that is stretched, so that the conveyor belt can always be kept taut. This allows the potatoes to be effectively transported even when there is a certain angle between the potato harvester and the seed cutter.

[0032] By incorporating elastic abutment and connecting components, the abrasive wheels on both sides of the conveyor belt can automatically switch according to the deflection direction of the two traction rods. This ensures that the abrasive wheel facing inwards in the deflection direction of the two traction rods abuts against the conveyor belt. As the conveyor belt moves, sliding friction occurs between the two to prevent lateral displacement of the conveyor belt. Furthermore, as the deflection angle of the two traction rods increases, the force between the abrasive wheel and the conveyor belt increases, thus ensuring that the friction between the abrasive wheel and the conveyor belt matches the angle between the two traction rods, further preventing lateral displacement of the conveyor belt. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of one embodiment of a pre-tightening auxiliary connection structure.

[0034] Figure 2 for Figure 1 Enlarged view of the structure at point A in the middle.

[0035] Figure 3 This is a schematic diagram of the pre-tightening auxiliary connection structure from another angle in one embodiment.

[0036] Figure 4 This is a schematic diagram of the frame structure, the first guide roller, the second guide roller, and the tensioning roller in one embodiment of the pre-tensioning auxiliary connection structure.

[0037] Figure 5 This is a schematic diagram of the equal division component and the tensioning component in one embodiment of the pre-tightening auxiliary connection structure.

[0038] Figure 6 This is a partial exploded view of the equally divided components in one embodiment of the pre-tightening auxiliary connection structure.

[0039] Figure 7 This is a schematic diagram of the connecting component in one embodiment of the pre-tightening auxiliary connection structure.

[0040] Figure 8 An exploded view of the elastic abutment component in one embodiment of the pre-tightening auxiliary connection structure.

[0041] In the diagram: 1. Support frame; 2. Telescopic rod; 3. Traction rod; 301. Annular groove; 4. Guide roller No. 1; 5. Guide roller No. 2; 6. Tensioning roller; 7. Conveyor belt; 8. Vertical plate; 9. Connecting sleeve; 10. Vertical pole; 11. Sliding sleeve; 12. Connecting plate; 1201. Slide groove No. 1; 1202. Collar; 13. Follower rod; 1301. Drive groove; 14. Slider No. 1; 15. Grooved wheel; 16. Pulley; 17. 1701. Pulling plate; 18. Inclined groove; 19. Hinge rod; 10. Side plate; 1901. Second slide groove; 20. Second slider; 21. Horizontal rod; 22. Guide sleeve; 23. Lifting component; 2301. Sliding connection; 24. Hysteresis sleeve; 2401. Limiting block; 25. Telescopic shaft; 2501. Limiting ring; 2502. Limiting groove; 26. Grinding wheel; 27. Spring; 28. Connecting plate; 29. ​​Abutment roller. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] Furthermore, elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0044] Please see Figures 1-8 In this embodiment of the invention, a pre-tightening auxiliary connection structure includes: a frame structure, a first guide roller 4, a second guide roller 5, a tension roller 6, an equal-dividing component, and a traction component. This allows the tension roller 6 to tighten the curled side of the conveyor belt 7 and release the stretched side of the conveyor belt 7 when the potato harvester turns, causing a change in the angle between the two traction rods 3. This ensures that the conveyor belt 7 remains taut at all times, thus enabling effective potato transport even when there is a certain angle between the potato harvester and the seed cutter.

[0045] Specifically, the frame structure consists of two sets of connecting frames, which connect the harvester and the seed cutter respectively. The two sets of connecting frames are rotatably connected. Each connecting frame includes a U-shaped support 1. Two telescopic rods 2 are slidably installed at the ends of the support 1, and the telescopic rods 2 on the two sets of connecting frames are rotatably connected. The seed cutter includes a grading roller, an adjusting roller, a rubber soft roller, and a cross-cutting blade. The grading roller can screen the potatoes to remove smaller potatoes. The adjusting roller can rotate and move along the horizontal plane to drive the potatoes forward and tumble, adjusting their state before entering the cutter and aligning them with the cutter to ensure that the potatoes are symmetrical and uniform in size when cut. The rubber soft roller has high elasticity and can clamp potatoes larger than a specified diameter and send them to the lower part of the cross-cutting blade for cutting.

[0046] The connection structure also includes two rotatably connected traction rods 3, which are connected to the bracket 1. One of the traction rods 3 has an annular groove 301 on its rotating shaft, and a collar 1202 formed on the connecting plate 12 is rotatably connected to the annular groove 301.

[0047] Two sets of the first guide roller 4 are provided and installed on the connecting structure respectively. A second guide roller 5 is provided between each set of the first guide roller 4, and a tension roller 6 is provided between each set of the second guide roller 5. A conveyor belt 7 is sleeved between the first guide roller 4, the second guide roller 5 and the tension roller 6.

[0048] Specifically, in this embodiment, a total of four No. 1 guide rollers 4, four No. 2 guide rollers 5, and two tension rollers 6 are provided. The two No. 1 guide rollers 4 form a group, and the two No. 2 guide rollers 5 form a group. The group of No. 1 guide rollers 4 and the group of No. 2 guide rollers 5 located on the upper layer are parallel and coplanar. A small gap (much smaller than the diameter of the potato) is left between the two No. 2 guide rollers 5 on the upper layer after the conveyor belt 7. At the same time, the tension rollers 6 on the upper layer are located below the two No. 2 guide rollers 5 on the upper layer. The conveyor belt 7 is taut by passing around these No. 1 guide rollers 4, No. 2 guide rollers 5, and tension rollers 6, so as to achieve the purpose of conveying potatoes when the conveyor belt 7 moves.

[0049] In use, one traction rod 3 is connected to the potato harvester, and the other traction rod 3 is connected to the potato seed cutter. When the potato harvester makes a sharp turn, the two traction rods 3 switch from being collinear to being at a certain angle to each other. At this time, the traction assembly drives the tension roller 6 to deflect, which keeps the conveyor belt 7 taut, thus ensuring the effective transport of potatoes. Based on this, the harvested potatoes can be stably transported to the potato seed cutter when the potato harvester is working, thereby improving the integration of potato harvesting and eliminating the need for secondary transport after potato harvesting, increasing operating speed and reducing harvesting costs.

[0050] Furthermore, since the conveyor belt 7 has a two-layer parallel structure, when the two traction rods 3 form a certain angle, one side of the conveyor belt 7 will be stretched and the other side will be curled. In order to ensure that the conveyor belt 7 is always in a taut state, the inclination state of the tension roller 6 is changed so that the conveyor belt 7 can keep in close contact with the tension roller 6. Thus, even if the two traction rods 3 form an angle with each other, the conveyor belt 7 can still meet the material transmission conditions.

[0051] Please see Figure 2 , Figure 5 , Figure 6 The equal-dividing component is disposed on the connecting structure and connected to the connecting plate 12. The equal-dividing component can make the connecting plate 12 be positioned on the midline of the angle formed by the two sets of connecting structures when the two sets of connecting structures rotate.

[0052] The equal division component includes a first slide groove 1201 arranged along the length direction of the connecting plate 12, a first slider 14 slidably installed in the first slide groove 1201, two coaxial grooved wheels 15 rotatably installed on the first slider 14, and the first slider 14 is rotatably connected to the traction component.

[0053] The equal-division component also includes two follower rods 13 arranged crosswise on the two traction rods 3. Each follower rod 13 has a drive groove 1301 along its length, and the two grooved wheels 15 are respectively rolled in the drive groove 1301.

[0054] Two vertical plates 8 are rotatably connected to the ends of the two sets of tension rollers 6. A connecting sleeve 9 is fixedly installed on the side of the vertical plate 8. A vertical rod 10 is slidably installed inside the connecting sleeve 9. A sliding sleeve 11 slidably disposed on the connecting plate 12 is fixedly connected to the vertical rod 10.

[0055] A connecting plate 28 is also installed on the connecting plate 12, and the connecting plate 28 is rotatably connected to the second guide roller 5.

[0056] When the two traction rods 3 deflect due to a large-angle turn of the potato harvester, the two traction rods 3 will rotate relative to each other, causing the follower rods 13 mounted on the two traction rods 3 to rotate accordingly. When the angle between the two traction rods 3 decreases, the overlapping position of the two follower rods 13 will move towards the axis of rotation of the traction rod 3, causing the two grooved wheels 15 to move towards the traction rod 3 along the length of the drive groove 1301, and driving the first slider 14 to move towards the collar 1202 along the length of the first slide groove 1201. During this process, the connecting plate 12 is always positioned at the center line of the angle formed by the two traction rods 3. The second guide roller 5 is connected to the connecting plate 12 via the connecting plate 28, and the tension roller 6 is connected to the connecting plate 12 via the vertical plate 8, the connecting sleeve 9, the vertical rod 10, and the sliding sleeve 11. This ensures that during the above process, the second guide roller 5 and the tension roller 6 are parallel to the centerline of the angle formed by the two traction rods 3. This makes the position of the second guide roller 5 and the tension roller 6 more stable after the angle of the two traction rods 3 changes. This prevents the second guide roller 5 and the tension roller 6 from swinging irregularly, which could cause the side of the conveyor belt 7 to become tense and released, causing the potatoes to bounce and fall off the conveyor belt 7.

[0057] Please see Figure 2 , Figure 5 The traction assembly connects the two sets of tension rollers 6 and the equalizing assembly. The traction assembly enables the two sets of tension rollers 6 to be parallel, and when the two sets of connecting structures rotate, the traction assembly can drive the two sets of tension rollers 6 to deflect.

[0058] The traction assembly includes a hinge rod 18 rotatably connected to the two upright plates 8. The middle part of the hinge rod 18 is rotatably connected to the traction rod 3, and a traction plate 17 is fixedly installed on the hinge rod 18.

[0059] The traction assembly also includes a pulley 16 rotatably connected to the first slider 14, the pulley 16 being able to roll within an inclined groove 1701 formed on the traction plate 17.

[0060] Furthermore, the two vertical plates 8 and the two tension rollers 6 form a parallelogram. When the angle between the two traction rods 3 changes, the first slider 14 will move along the length of the first chute 1201. Specifically, when the first slider 14 moves toward the pivot of the traction rod 3, it indicates that the two traction rods 3 are deflected to that side, meaning the angle formed by the two traction rods 3 on that side is smaller. At this time, the first slider 14 will drive the pulley 16 to move toward the traction rod 3. At this time, the pulley 16 cooperates with the inclined chute 1701 to... The hinge rod 18 is deflected, causing one end of the hinge rod 18 on that side to deflect downwards, which in turn causes the tension roller 6 to deflect. When the traction rod 3 deflects toward that side, the conveyor belt 7 on that side is in a curled state, while the other side is in a stretched state. This allows the tension roller 6 to tighten the curled side of the conveyor belt 7 and release the stretched side of the conveyor belt 7 when it deflects, ensuring that the conveyor belt 7 remains taut. This ensures that the conveyor belt 7 can effectively transport potatoes when the potato harvester turns.

[0061] With the above settings, when the potato harvester turns and causes a change in the angle between the two traction rods 3, the tension roller 6 can tighten the side of the conveyor belt 7 that is curled by deflection and release the side of the conveyor belt 7 that is stretched, so that the conveyor belt 7 can always be kept taut. This enables the effective transmission of potatoes even when there is a certain angle between the potato harvester and the seed cutter.

[0062] Please see Figure 1 , Figure 3 , Figure 7 , Figure 8 A pre-tightening auxiliary connection structure further includes: an abutment roller 29, an elastic abutment component, and a connection component;

[0063] The abutting roller 29 is rotatably mounted on one of the sets of brackets 1;

[0064] Two sets of the elastic abutment components are provided and installed on the upper part of the conveyor belt 7. A grinding wheel 26 is rotatably installed on one end of the elastic abutment component facing the conveyor belt 7. The side of the grinding wheel 26 opposite to the direction of movement of the conveyor belt 7 is deflected toward the middle of the conveyor belt 7.

[0065] The elastic abutment component includes a hysteresis sleeve 24 fixedly connected to the connecting component, a telescopic shaft 25 slidably installed inside the hysteresis sleeve 24, the telescopic shaft 25 being rotatably connected to the grinding wheel 26, and a limit ring 2501 being formed on the telescopic shaft 25.

[0066] A spring 27 is also sleeved on the telescopic shaft 25. One end of the spring 27 is connected to the limiting ring 2501, and the other end is connected to the inner wall of the hysteresis sleeve 24. A limiting block 2401 is provided on the hysteresis sleeve 24. The limiting block 2401 is slidably engaged with the limiting groove 2502 provided along the length direction of the telescopic shaft 25.

[0067] The connecting component connects the elastic abutment component and the upright plate 8. When the two sets of connecting structures deflect, the connecting component enables the abrasive wheel 26 located inside the angle formed by the two sets of connecting structures to abut against the conveyor belt 7. The connecting component includes two guide sleeves 22 fixedly installed on the bracket 1. A lifting member 23 is slidably installed between the two guide sleeves 22. The upper end of the lifting member 23 is connected to the elastic abutment component, and the lower end forms a sliding connection part 2301.

[0068] The connecting assembly also includes a side plate 19 fixedly connected to the upright plate 8. A second sliding groove 1901 is provided on the side plate 19. A second slider 20 is slidably installed in the second sliding groove 1901. A horizontal rod 21 rotatably connected to the sliding connection part 2301 is rotatably installed on the second slider 20.

[0069] When the two traction rods 3 rotate relative to each other, the tilt state of the tension roller 6 will also change. When the tilt state of the tension roller 6 changes, the distance between the two vertical plates 8 will also change. Under the guidance of the sliding sleeve 11, the vertical rod 10 and the connecting sleeve 9, the sliding sleeve 11 can be driven to move along the connecting plate 12. When the hinge rod 18 deflects, it will drive one of the vertical plates 8 to move downward and the other vertical plate 8 to move upward. Specifically, the end of the hinge rod 18 that deflects downward is towards the end where the angle formed between the two traction rods 3 decreases. At this time, the vertical plate 8 on that side moves downward, which drives the lifting component 23 to move downward, so that the grinding wheel 26 on that side abuts against the conveyor belt 7, while the grinding wheel 26 on the other side separates from the conveyor belt 7.

[0070] Because the tension roller 6 is tilted, the conveyor belt 7 tends to move towards the lower end of the tension roller 6 during movement. At this time, the abrasive wheel 26 abuts against the conveyor belt 7, and the side of the abrasive wheel 26 away from the direction of movement of the conveyor belt 7 is deflected towards the middle of the conveyor belt 7, so that the abrasive wheel 26 has a lateral pulling effect on the conveyor belt 7, thus preventing the conveyor belt 7 from shifting laterally. As the angle change value of the two traction rods 3 increases, the tilt of the tension roller 6 increases, and the lateral force on the conveyor belt 7 increases. However, the higher the tilt of the tension roller 6, the greater the lifting amount of the vertical plate 8, which in turn increases the displacement of the hysteresis sleeve 24 and the compression of the spring 27, thus increasing the friction between the abrasive wheel 26 and the conveyor belt 7. Based on this, the friction between the abrasive wheel 26 and the conveyor belt 7 can be matched with the angle between the two traction rods 3, effectively preventing the conveyor belt 7 from shifting laterally.

[0071] With the above configuration, the abrasive wheels 26 on both sides of the conveyor belt 7 can automatically switch according to the deflection direction of the two traction rods 3, so that the abrasive wheel 26 facing the inner side of the deflection direction of the two traction rods 3 abuts against the conveyor belt 7. When the conveyor belt 7 moves, the two sides slide against each other to prevent the conveyor belt 7 from shifting laterally. As the deflection angle of the two traction rods 3 increases, the force between the abrasive wheel 26 and the conveyor belt 7 increases, so that the friction between the abrasive wheel 26 and the conveyor belt 7 can match the angle between the two traction rods 3, further preventing the conveyor belt 7 from shifting laterally.

[0072] As an embodiment of the present invention, a potato harvester is also proposed, including the aforementioned pre-tightening auxiliary connection structure.

[0073] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0074] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A pre-tightening auxiliary connection structure, characterized in that, include: The frame structure is formed by two sets of connecting frames, which respectively connect the harvester and the seed cutter. The two sets of connecting frames are rotatably connected. Two sets of first guide rollers (4) are provided and installed on the connecting structure respectively. A set of second guide rollers (5) is provided between each set of first guide rollers (4), and a tension roller (6) is provided between each set of second guide rollers (5). A conveyor belt (7) is sleeved between the first guide rollers (4), the second guide rollers (5) and the tension roller (6). An equal-division component is disposed on the connecting structure and connected to a connecting plate (12). The equal-division component is able to position the connecting plate (12) on the midline of the angle formed by the two sets of connecting structures when the two sets of connecting structures rotate. The traction assembly connects the two sets of tension rollers (6) and the dividing assembly. The traction assembly enables the two sets of tension rollers (6) to be parallel, and when the two sets of the connecting structure rotate, the traction assembly can drive the two sets of tension rollers (6) to deflect. The connection structure includes a bracket (1) with a "U" shaped structure. Two telescopic rods (2) are slidably installed at the ends of the bracket (1), and the two sets of telescopic rods (2) on the connection structure are rotatably connected. The connection structure also includes two rotatably connected traction rods (3), which are connected to the bracket (1), and one of the traction rods (3) has an annular groove (301) on its rotating shaft, and a collar (1202) formed on the connecting plate (12) is rotatably connected to the annular groove (301). The equal division component includes a first slide groove (1201) arranged along the length direction of the connecting plate (12), a first slider (14) is slidably installed in the first slide groove (1201), two coaxial grooved wheels (15) are rotatably installed on the first slider (14), and the first slider (14) is rotatably connected to the traction component. The equal-division component also includes two follower rods (13) arranged crosswise on the two traction rods (3). The follower rods (13) are provided with drive grooves (1301) along their length direction, and the two grooved wheels (15) are respectively rolled in the drive grooves (1301).

2. The pre-tightening auxiliary connection structure according to claim 1, characterized in that, Two vertical plates (8) are rotatably connected to the ends of the two sets of tension rollers (6). A connecting sleeve (9) is fixedly installed on the side of the vertical plate (8). A vertical rod (10) is slidably installed inside the connecting sleeve (9). A sliding sleeve (11) slidably set on the connecting plate (12) is fixedly connected to the vertical rod (10). A connecting plate (28) is also installed on the connecting plate (12), and the connecting plate (28) is rotatably connected to the second guide roller (5).

3. The pre-tightening auxiliary connection structure according to claim 2, characterized in that, The traction assembly includes a hinge rod (18) rotatably connected to the two upright plates (8), the middle part of the hinge rod (18) is rotatably connected to the traction rod (3), and a traction plate (17) is fixedly installed on the hinge rod (18). The traction assembly also includes a pulley (16) rotatably connected to the first slider (14), the pulley (16) being able to roll within an inclined groove (1701) formed on the traction plate (17).

4. The pre-tightening auxiliary connection structure according to claim 3, characterized in that, Also includes: The abutment roller (29) is rotatably mounted on one of the sets of brackets (1); Two sets of elastic abutment components are provided and installed on the upper part of the conveyor belt (7). A grinding wheel (26) is rotatably installed on one end of the elastic abutment component facing the conveyor belt (7). The grinding wheel (26) is deflected toward the middle of the conveyor belt (7) on the side opposite to the direction of movement of the conveyor belt (7). A connecting component connects the elastic abutment component and the upright plate (8). The connecting component is capable of abutting the abrasive wheel (26) located inside the angle formed by the two sets of connecting structures when the two sets of connecting structures are deflected.

5. The pre-tightening auxiliary connection structure according to claim 4, characterized in that, The connecting assembly includes two guide sleeves (22) fixedly installed on the bracket (1), and a lifting member (23) is slidably installed between the two guide sleeves (22). The upper end of the lifting member (23) is connected to the elastic abutment assembly, and the lower end forms a sliding connection part (2301). The connecting assembly also includes a side plate (19) fixedly connected to the upright plate (8). A second slide groove (1901) is provided on the side plate (19). A second slider (20) is slidably installed in the second slide groove (1901). A horizontal rod (21) rotatably connected to the sliding connection part (2301) is rotatably installed on the second slider (20).

6. The pre-tightening auxiliary connection structure according to claim 5, characterized in that, The elastic abutment assembly includes a hysteresis sleeve (24) fixedly connected to the lifting member (23), a telescopic shaft (25) is slidably installed inside the hysteresis sleeve (24), the telescopic shaft (25) is rotatably connected to the grinding wheel (26), and a limit ring (2501) is formed on the telescopic shaft (25). A spring (27) is also fitted on the telescopic shaft (25). One end of the spring (27) is connected to the limiting ring (2501), and the other end is connected to the inner wall of the hysteresis sleeve (24).

7. The pre-tightening auxiliary connection structure according to claim 6, characterized in that, The hysteresis sleeve (24) is provided with a limiting block (2401), and the limiting block (2401) slides in cooperation with the limiting groove (2502) provided along the length direction of the telescopic shaft (25).

8. A potato harvester, characterized in that, Includes the pre-tightening auxiliary connection structure as described in claim 4.

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