Harvester floating roller height adjustment mechanism, harvester bridge passing transmission mechanism, and harvester

Abstract

This utility model relates to the field of harvester floating roller height adjustment technology, specifically to a harvester floating roller height adjustment mechanism, a harvester bridge transmission mechanism, and a harvester. The harvester floating roller height adjustment mechanism includes a central shaft and two mounting plates. The central shaft movably passes through the two mounting plates, with its two ends located on the outer sides of the two mounting plates. The portion of the central shaft between the two mounting plates forms a mounting section, on which multiple rotating connection structures are fixedly mounted. These rotating connection structures are fixedly sleeved with the floating roller, allowing the floating roller to rotate circumferentially around the mounting section via the rotating connection structures. The two ends of the central shaft are respectively located on the outer sides of the two mounting plates via height adjustment structures. The height adjustment structures enable continuous height adjustment of the central shaft and drive the floating roller to achieve continuous height adjustment. Using this harvester floating roller height adjustment mechanism, the height of the floating roller can be adjusted.

Description

Technical Field

[0001] This utility model relates to the field of harvester floating roller height adjustment technology, specifically to a harvester floating roller height adjustment mechanism, a harvester bridge transmission mechanism, and a harvester. Background Technology

[0002] In a harvester, a chain rake is installed on a floating roller. The floating roller can drive the chain rake to rotate, and the chain rake can apply force to the crop grains being transported, so that the crop grains can move downstream more smoothly.

[0003] Crop grains often vary in size; for example, corn grains are relatively large, while wheat grains are relatively small. However, the floating roller operates at a essentially fixed height, which means the chain rake can only effectively convey certain types of crop grains. For instance, if the floating roller is positioned high, the chain rake conveys relatively large grains like corn well, but poorly on smaller grains like wheat. Conversely, if the floating roller is positioned low, the chain rake conveys relatively large grains like wheat well, but poorly on larger grains like corn.

[0004] Therefore, in order for the chain rake to achieve a better conveying effect on various types of crop particles, it is necessary to enable the floating roller to achieve height adjustment. Utility Model Content

[0005] The purpose of this invention is to overcome the problem that existing floating rollers cannot achieve height adjustment.

[0006] To achieve the above objectives, this utility model provides a harvester floating roller height adjustment mechanism, which includes a central shaft and two mounting plates. The two mounting plates are spaced apart along the length of the central shaft, and the central shaft movably passes through the two mounting plates. Both ends of the central shaft are located on the outer sides of the two mounting plates, and the portion of the central shaft between the two mounting plates forms a mounting section. Multiple rotating connection structures, spaced apart along the axis of the mounting section, are fixedly mounted on the mounting section. The rotating connection structures are fixedly sleeved with the floating roller, allowing the floating roller to rotate circumferentially around the mounting section via the rotating connection structures. Both ends of the central shaft are located on the outer sides of the two mounting plates via height adjustment structures. The height adjustment structures enable continuous height adjustment of the central shaft and drive the floating roller to achieve continuous height adjustment.

[0007] In some embodiments, the height adjustment structure includes a support plate and a connecting rod. The support plate is fixedly installed on the outer side of the mounting plate and is located above the central shaft. The end of the central shaft is connected to the support plate via the connecting rod, and the distance between the axis of the central shaft and the bottom surface of the support plate can be continuously adjusted.

[0008] In some embodiments, the height adjustment structure further includes a positioning nut and a spring. The positioning nut is threaded onto the connecting rod, and its position on the connecting rod is adjustable. The connecting rod moves through the support plate. The positioning nut presses against the top surface of the support plate. The spring is movably sleeved on the connecting rod and is located between the end of the central shaft and the support plate. When compressed, the spring can drive the central shaft away from the support plate.

[0009] In some embodiments, the height adjustment structure further includes an elastic pad, which is movably sleeved on the connecting rod and disposed between the support plate and the positioning nut; and / or, the height adjustment structure further includes a connecting block, the end of the central shaft movably passing through the connecting block, the connecting block being fixedly connected to the connecting rod, a spring being disposed between the connecting block and the support plate, and the end of the central shaft being provided with a cotter pin for preventing the central shaft from disengaging from the connecting block.

[0010] In some embodiments, the height adjustment structure further includes a slider, which is movably sleeved on the connecting rod, disposed between the support plate and the elastic pad, with the bottom surface of the slider adaptively conforming to the top surface of the support plate and the top surface of the slider conforming to the bottom surface of the elastic pad.

[0011] In some embodiments, limiting plates are provided on both sides of the support plate, and the support plate and the two limiting plates are connected to form a U-shaped lifting plate; the limiting plates are fixedly connected to the mounting plate, and the positioning nut is located between the two limiting plates.

[0012] In some embodiments, there is a smooth transition between the support plate and the limiting plate; the lifting plate has an elongated hole extending from the support plate to one of the limiting plates, through which a connecting rod moves.

[0013] In some embodiments, the rotating connection structure includes a sleeve, a bearing, and a connecting ring. The sleeve is fixedly fitted onto the outside of the mounting section, the inner ring of the bearing is fixedly fitted onto the outside of the sleeve, and the connecting ring is fixedly fitted onto the outer ring of the bearing. The connecting ring is used to fix the floating roller.

[0014] Another aspect of this utility model provides a bridge transmission mechanism for a harvester, which includes a floating roller and a harvester floating roller height adjustment mechanism as described in the above embodiment. The floating roller is fixedly sleeved on the rotating connection structure, and the floating roller can rotate circumferentially around the mounting section through the rotating connection structure.

[0015] In another aspect, this utility model also provides a harvester, which includes the harvester bridge transmission mechanism of the above embodiment.

[0016] The above-mentioned technical solution of this utility model has the following beneficial effects:

[0017] After the floating roller is fixedly fitted onto the rotating connection structure, it also fits outside the mounting section. The floating roller can rotate relative to the central shaft via the rotating connection structure, and the central shaft does not obstruct the floating roller from driving the chain rake. When the height of the floating roller needs to be adjusted, the two height adjustment structures are adjusted to reposition the central shaft, thereby allowing the floating roller fitted outside the mounting section to be adjusted to a suitable position. Furthermore, because the height adjustment structure can continuously adjust the height of the central shaft, the floating roller fitted onto the central shaft can be simultaneously and continuously adjusted in height, enabling the floating roller to operate at multiple height positions and improving the conveying efficiency of various crop grains. Therefore, the harvester floating roller height adjustment mechanism of this invention can achieve height adjustment of the floating roller. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of a harvester bridge transmission mechanism in one embodiment of the present invention;

[0019] Figure 2 yes Figure 1 A magnified view of part A in the middle;

[0020] Figure 3 This is a side view schematic diagram of the bridge transmission mechanism for a harvester in one embodiment of this utility model;

[0021] Figure 4 yes Figure 3 A magnified view of part B in the middle section;

[0022] Figure 5 This is a cross-sectional schematic diagram of a harvester bridge transmission mechanism in one embodiment of the present invention;

[0023] Figure 6 yes Figure 5 A magnified view of part C in the middle;

[0024] Figure 7 This is a schematic diagram of the installation of the rotating connection structure in one embodiment of the present invention.

[0025] Explanation of reference numerals in the attached figures

[0026] 1. Central shaft; 11. Cotter pin; 12. Mounting section;

[0027] 2. Mounting plate;

[0028] 3. Rotating connection structure; 31. Sleeve; 32. Bearing; 33. Connecting ring;

[0029] 4. Height adjustment structure; 41. Support plate; 42. Connecting rod; 43. Positioning nut; 44. Spring; 45. Elastic pad; 46. Slider; 47. Limiting plate; 471. Elongated hole; 48. Connecting block;

[0030] 5. Floating roller; 51. Installation channel; 52. Ring plate;

[0031] 6. Support arm. Detailed Implementation

[0032] The features and exemplary embodiments of various aspects of this utility model will now be described in detail. To make the objectives, technical solutions, and advantages of this utility model clearer, the following description, in conjunction with the accompanying drawings and specific embodiments, will provide a further detailed description. It should be understood that the specific embodiments described herein are intended only to explain this utility model and not to limit it. For those skilled in the art, this utility model can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this utility model by illustrating examples of it.

[0033] To make the invention clearer to those skilled in the art, the structure of the floating roller 5 is described below. The floating roller 5 is a hollow shaft, and a mounting channel 51 extending along its length is provided in the middle of the floating roller 5. The mounting channel 51 reduces the weight of the floating roller 5 and facilitates a rotatable connection with the support arm 6 of the bridge transmission mechanism of the harvester. Based on the above-mentioned structural features of the floating roller 5, the present invention designs the following technical solution.

[0034] like Figures 1 to 6 As shown, this utility model provides a height adjustment mechanism for a harvester's floating roller, which includes a central shaft 1 and two mounting plates 2. The two mounting plates 2 are spaced apart along the length of the central shaft 1. The central shaft 1 movably passes through the two mounting plates 2, and its two ends are located on the outer sides of the two mounting plates 2 respectively. The portion of the central shaft 1 located between the two mounting plates 2 forms a mounting section 12. Multiple rotating connection structures 3, spaced apart along the axis of the mounting section 12, are fixedly mounted on the mounting section 12. The rotating connection structures 3 are fixedly sleeved with the floating roller 5, allowing the floating roller 5 to rotate circumferentially around the mounting section 12 via the rotating connection structures 3. The two ends of the central shaft 1 are respectively located on the outer sides of the two mounting plates 2 via height adjustment structures 4. The height adjustment structures 4 are used to continuously adjust the height of the central shaft 1 and drive the floating roller 5 to achieve continuous height adjustment.

[0035] Specifically, after the floating roller 5 is fixedly fitted onto the rotating connection structure 3, the floating roller 5 is also fitted onto the outside of the mounting section 12. The floating roller 5 can rotate relative to the central shaft 1 via the rotating connection structure 3, and the central shaft 1 does not obstruct the floating roller 5 from driving the chain rake to rotate. When it is necessary to adjust the height of the floating roller 5, the two height adjustment structures 4 are adjusted so that the central shaft 1 can be adjusted, thereby allowing the floating roller 5 fitted onto the outside of the mounting section 12 to be adjusted to a suitable position. Furthermore, since the height adjustment structure 4 can continuously adjust the height of the central shaft 1, the floating roller 5 fitted onto the central shaft 1 can be simultaneously and continuously adjusted in height, allowing the floating roller 5 to operate at multiple height positions, improving the conveying effect of various crop grains. Therefore, the harvester floating roller height adjustment mechanism of this invention can achieve height adjustment of the floating roller 5.

[0036] Those skilled in the art will understand that the reason why the central shaft 1 can move the mounting plate 2 is because the mounting plate 2 is provided with a through hole through which the central shaft 1 can move, and the diameter of the through hole is larger than the outer diameter of the central shaft 1. The central shaft 1 can move up and down appropriately in the through hole, thereby allowing the central shaft 1 to be adjusted in height.

[0037] like Figures 1 to 6 As shown, in some embodiments of this utility model, the height adjustment structure 4 includes a support plate 41 and a connecting rod 42. The support plate 41 is fixedly installed on the outer side of the mounting plate 2 and is located above the central shaft 1. The end of the central shaft 1 is connected to the support plate 41 through the connecting rod 42, and the distance between the axis of the central shaft 1 and the bottom surface of the support plate 41 can be continuously adjusted.

[0038] Specifically, by adjusting the distance between the axis of the central shaft 1 and the bottom surface of the support plate 41, the height of the central shaft 1 can be changed, thereby enabling the height adjustment of the floating roller 5.

[0039] It should be noted that the distance between the axis of the central shaft 1 and the bottom surface of the support plate 41 can be adjusted in various ways, and this utility model does not impose any limitations. For example, the connecting rod 42 is rotatably connected to the central shaft 1 and threadedly connected to the support plate 41. By rotating the connecting rod 42, the connecting rod 42 can be raised or lowered relative to the support plate 41, thereby adjusting the distance between the central shaft 1 and the support plate 41. Another example is that two nuts are threaded onto the connecting rod 42, and these two nuts are respectively clamped on the upper and lower sides of the support plate 41; by rotating the two nuts, the position of the two nuts on the connecting rod 42 can be adjusted, thereby raising or lowering the position of the central shaft 1.

[0040] like Figures 1 to 6As shown, in some embodiments of this utility model, the height adjustment structure 4 further includes a positioning nut 43 and a spring 44. The positioning nut 43 is threaded onto the connecting rod 42, and its position on the connecting rod 42 is adjustable. The connecting rod 42 moves through the support plate 41. The positioning nut 43 presses against the top surface of the support plate 41. The spring 44 is movably sleeved on the connecting rod 42 and is located between the end of the central shaft 1 and the support plate 41. When compressed, the spring 44 can drive the central shaft 1 away from the support plate 41.

[0041] Specifically, by rotating the positioning nut 43 forward or backward, it moves along the connecting rod 42. When the positioning nut 43 moves along the connecting rod 42 towards the central shaft 1, the distance between the central shaft 1 and the support plate 41 is reduced, the position of the central shaft 1 is raised, and the position of the floating roller 5 is increased. When the positioning nut 43 moves along the connecting rod 42 away from the central shaft 1, the distance between the central shaft 1 and the support plate 41 is increased, the position of the central shaft 1 is lowered, and the position of the floating roller 5 is decreased. Furthermore, due to the threaded connection between the positioning nut 43 and the connecting rod 42, the height of the central shaft 1 can be continuously adjusted, thereby allowing the position of the floating roller 5 to be continuously adjusted. Additionally, the spring 44, in its compressed state, can drive the central shaft 1 away from the support plate 41, ensuring that the central shaft 1 remains in the adjusted position. Moreover, through the cooperation of the spring 44 and the positioning nut 43, the height adjustment of the central shaft 1 can be completed simply by adjusting the positioning nut 43, making operation convenient.

[0042] In some embodiments, there are two positioning nuts 43, both of which are threaded onto the connecting rod 42. The first positioning nut 43 presses against the top surface of the support plate 41, and the second positioning nut 43 presses against the top of the first positioning nut 43. The second positioning nut 43 can prevent the first positioning nut 43 from loosening.

[0043] like Figures 1 to 6 As shown, in some embodiments of this utility model, the height adjustment structure 4 further includes an elastic pad 45, which is movably sleeved on the connecting rod 42 and disposed between the support plate 41 and the positioning nut 43.

[0044] Specifically, the elastic pad 45 can protect the connecting rod 42 and prevent friction between the connecting rod 42 and the mounting plate 2. Moreover, the elastic pad 45 can be placed under the positioning nut 43 to prevent friction and impact between the positioning nut 43 and the support plate 41.

[0045] In some embodiments, the elastic pad 45 may be made of an elastic material such as rubber or polystyrene.

[0046] like Figures 1 to 6As shown, in some embodiments of this utility model, the height adjustment structure 4 further includes a slider 46, which is movably sleeved on the connecting rod 42. The slider 46 is disposed between the support plate 41 and the elastic pad 45. The bottom surface of the slider 46 is adaptively attached to the top surface of the support plate 41, and the top surface of the slider 46 is attached to the bottom surface of the elastic pad 45.

[0047] Specifically, the shape of the bottom of the slider 46 matches the shape of the top of the support plate 41, so the top surface of the slider 46 can fit against the bottom surface of the elastic pad 45. This makes the position of the slider 46 more stable and less likely to move relative to the support plate 41. By setting the slider 46, it is convenient to install the elastic pad 45 and to facilitate the function of the elastic pad 45. Preferably, the top surface of the slider 46 is flat, which facilitates the installation of the elastic pad 45 and maintains its stable position.

[0048] In some embodiments, the support plate 41 is a curved plate, and the support plate 41 is concave and bent towards the central axis 1, and the bottom of the slider 46 is arched towards the central axis 1, so that the bottom surface of the slider 46 is in contact with the top surface of the support plate 41. In other embodiments, the support plate 41 is a flat plate, and the bottom surface of the slider 46 is flat, so that the bottom surface of the slider 46 is in contact with the top surface of the support plate 41.

[0049] like Figures 1 to 6 As shown, in some embodiments of this utility model, the height adjustment structure 4 further includes a connecting block 48, the end of the central shaft 1 movably passes through the connecting block 48, the connecting block 48 is fixedly connected to the connecting rod 42, the spring 44 is disposed between the connecting block 48 and the support plate 41, and the end of the central shaft 1 is provided with a cotter pin 11 for preventing the central shaft 1 from disengaging from the connecting block 48.

[0050] Specifically, by setting the connecting block 48, it is convenient to connect the central shaft 1 and the connecting rod 42, and also convenient to assemble the central shaft 1 onto the mounting plate 2. The cotter pin 11 is inserted radially through the end of the central shaft 1, and the connecting block 48 is located between the cotter pin 11 and the mounting plate 2. The cotter pin 11 can restrict the central shaft 1 and prevent the central shaft 1 from detaching from the connecting block 48.

[0051] In other embodiments, the connecting rod 42 is directly welded to the central shaft 1. In still other embodiments, the central shaft 1 and the connecting rod 42 are respectively fixedly connected to the connecting block 48, for example, by welding.

[0052] like Figures 1 to 6 As shown, in some embodiments of this utility model, the support plate 41 is provided with limiting plates 47 on both sides, and the support plate 41 and the two limiting plates 47 are connected to form a U-shaped hoisting plate; the limiting plates 47 are fixedly connected to the mounting plate 2, and the positioning nut 43 is located between the two limiting plates 47.

[0053] Specifically, the limiting plate 47 strengthens the connection between the support plate 41 and the mounting plate 2, preventing the support plate 41 from deforming or even being damaged. Furthermore, the limiting plate 47 helps restrict the forward and backward swing of the connecting rod 42.

[0054] In some embodiments, the elastic pad 45 and the slider 46 are located between two limiting plates 47.

[0055] like Figures 1 to 6 As shown, in some embodiments of this utility model, the support plate 41 and the limiting plate 47 have a smooth transition; the lifting plate is provided with an elongated hole 471, which extends from the support plate 41 to one of the limiting plates 47, and the connecting rod 42 moves through the elongated hole 471.

[0056] Specifically, the support plate 41 and the limiting plate 47 have a smooth transition, so the elongated hole 471 extends smoothly. The cooperation between the elongated hole 471 and the connecting rod 42 facilitates the adjustment or maintenance of the floating roller 5.

[0057] It should be noted that the height adjustment structure 4 can also adopt any other mechanism form that can meet the usage requirements of this utility model. For example, the height adjustment structure 4 may include an electric telescopic rod, the fixed end of which is fixedly connected to the mounting plate 2, and the telescopic end of which is fixedly connected to the end of the central shaft 1. As another example, the height adjustment structure 4 may include a hydraulic cylinder, and the connection method of the hydraulic cylinder can refer to the electric telescopic rod of the above embodiment, which will not be repeated here.

[0058] like Figures 6 to 7 As shown, in some embodiments of this utility model, the rotating connection structure 3 includes a sleeve 31, a bearing 32 and a connecting ring 33. The sleeve 31 is fixedly sleeved on the outside of the mounting section 12, the inner ring of the bearing 32 is fixedly sleeved on the outside of the sleeve 31, and the connecting ring 33 is fixedly sleeved on the outer ring of the bearing 32. The connecting ring 33 is used to fix the floating roller 5.

[0059] Specifically, the floating roller 5 can be fixedly sleeved on the outside of the connecting ring 33, that is, the connecting ring 33 can be accommodated in the mounting channel 51 of the floating roller 5. At this time, the floating roller 5 will also be coaxially sleeved on the outside of the mounting section 12, and the floating roller 5 can rotate relative to the mounting section 12 through the bearing 32.

[0060] It should be noted that the floating roller 5 can be fixedly sleeved on the outside of the connecting ring 33 in various ways, and this utility model does not impose any limitations. For example, the connecting ring 33 can form an interference fit with the side wall of the mounting channel 51 of the floating roller 5 to achieve fixed sleeve. As another example, the connecting ring 33 can be welded to the side wall of the mounting channel 51 of the floating roller 5 to achieve fixed sleeve.

[0061] In some embodiments, such as Figures 6 to 7 As shown, the mounting channel 51 of the floating roller 5 is provided with two ring plates 52. The ring plates 52 are welded to the side wall of the mounting channel 51 of the floating roller 5, and the ring plates 52 are distributed around the central axis 1. The two ring plates 52 are respectively attached to two connecting rings 33, and the ring plates 52 and the connecting rings 33 are fixedly connected by multiple bolt and nut assemblies.

[0062] In addition, the rotating connection structure 3 can also be any other structural form that meets the requirements of this utility model, and this utility model does not impose any limitations. For example, the rotating connection structure 3 includes an outer ring, an inner ring, and a plurality of balls. The inner ring is fixedly sleeved on the outside of the central shaft 1, the outer ring surrounds the inner ring, and all the balls are evenly distributed between the outer ring and the inner ring. The outer ring can rotate relative to the inner ring through the balls, and the floating roller 5 can be fixedly sleeved on the outside of the outer ring.

[0063] like Figures 1 to 6 As shown, this utility model also provides a bridge transmission mechanism for a harvester. The bridge transmission mechanism for a harvester includes a floating roller 5 and a harvester floating roller height adjustment mechanism as described in the above embodiment. The floating roller 5 is fixedly sleeved on the rotating connection structure 3, and the floating roller 5 can rotate circumferentially around the mounting section 12 through the rotating connection structure 3.

[0064] Specifically, the harvester's bridge transmission mechanism adopts the harvester floating roller height adjustment mechanism of the above embodiment, so the harvester's bridge transmission mechanism can also achieve the above-mentioned technical effects.

[0065] In some embodiments, the harvester's bridge transmission mechanism further includes two support arms 6, which are rotatably connected to both ends of the floating roller 5. The two support arms 6 are also connected to the inner sides of two mounting plates 2, and the support arms 6 are movable and positioned relative to the mounting plates 2. Of course, the connection method between the support arms 6 and the floating roller 5, and the connection method between the support arms 6 and the mounting plates 2, can be described in detail in the prior art by those skilled in the art, and will not be elaborated upon here.

[0066] In some embodiments, the support arm 6 can be fixedly sleeved on the outside of the sleeve 31, and the bearing 32, the connecting ring 33 and the ring plate 52 are all spaced apart from the support arm 6.

[0067] This utility model also provides a harvester, which includes the harvester bridge transmission mechanism of the above embodiment.

[0068] Specifically, the harvester adopts the harvester bridge transmission mechanism of the above embodiment, so the harvester can also achieve the above technical effects.

[0069] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The above examples are only for the purpose of helping to understand the method and core ideas of this utility model. The above are only preferred embodiments of this utility model. It should be noted that due to the limitations of textual expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of this utility model, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the concept and technical solution of this utility model to other occasions without modification, should all be considered within the protection scope of this utility model.

Claims

1. A harvester floating roller height adjustment mechanism characterized by, Includes a central shaft (1) and two mounting plates (2); Two mounting plates (2) are spaced apart along the length of the central shaft (1). The central shaft (1) moves through the two mounting plates (2), and the two ends of the central shaft (1) are located on the outer sides of the two mounting plates (2). The portion of the central shaft (1) between the two mounting plates (2) forms a mounting section (12). Multiple rotating connection structures (3) are fixedly mounted on the mounting section (12) and spaced apart along the axis of the mounting section (12). The rotating connection structure (3) is fixedly sleeved with the floating roller (5) so that the floating roller (5) can rotate circumferentially around the mounting section (12) through the rotating connection structure (3). The two ends of the central shaft (1) are respectively set on the outer side of the two mounting plates (2) through the height adjustment structure (4); the height adjustment structure (4) is used to make the central shaft (1) continuously adjust its height and drive the floating roller (5) to achieve continuous height adjustment.

2. The harvester floating roller height adjustment mechanism of claim 1, wherein, The height adjustment structure (4) includes a support plate (41) and a connecting rod (42). The support plate (41) is fixedly installed on the outer side of the mounting plate (2) and is located above the central shaft (1). The end of the central shaft (1) is connected to the support plate (41) through the connecting rod (42), and the distance between the axis of the central shaft (1) and the bottom surface of the support plate (41) can be continuously adjusted.

3. The harvester floating roller height adjustment mechanism of claim 2, wherein, The height adjustment structure (4) further includes a positioning nut (43) and a spring (44). The positioning nut (43) is threaded onto the connecting rod (42), and the position of the positioning nut (43) on the connecting rod (42) is adjustable. The connecting rod (42) moves through the support plate (41). The positioning nut (43) presses against the top surface of the support plate (41), the spring (44) is movably sleeved on the connecting rod (42), and the spring (44) is located between the end of the central shaft (1) and the support plate (41). When compressed, the spring (44) can drive the central shaft (1) away from the support plate (41).

4. The harvester floating roller height adjustment mechanism of claim 3, wherein, The height adjustment structure (4) further includes an elastic pad (45), which is movably sleeved on the connecting rod (42) and is positioned between the support plate (41) and the positioning nut (43); and / or, The height adjustment structure (4) also includes a connecting block (48), the end of the central shaft (1) moves through the connecting block (48), the connecting block (48) is fixedly connected to the connecting rod (42), the spring (44) is disposed between the connecting block (48) and the support plate (41), and the end of the central shaft (1) is provided with a cotter pin (11) to prevent the central shaft (1) from disengaging from the connecting block (48).

5. The harvester floating roller height adjustment mechanism of claim 4, wherein, The height adjustment structure (4) also includes a slider (46), which is movably sleeved on the connecting rod (42). The slider (46) is disposed between the support plate (41) and the elastic pad (45). The bottom surface of the slider (46) is adaptively attached to the top surface of the support plate (41), and the top surface of the slider (46) is attached to the bottom surface of the elastic pad (45).

6. The harvester floating roller height adjustment mechanism of claim 3, wherein, The support plate (41) is provided with limiting plates (47) on both sides, and the support plate (41) and the two limiting plates (47) are connected to form a U-shaped hoisting plate; the limiting plates (47) are fixedly connected to the mounting plate (2), and the positioning nut (43) is located between the two limiting plates (47).

7. The harvester floating roller height adjustment mechanism of claim 6, wherein, The support plate (41) and the limiting plate (47) have a smooth transition; the lifting plate is provided with an elongated hole (471) extending from the support plate (41) to one of the limiting plates (47), and the connecting rod (42) moves through the elongated hole (471).

8. The harvester floating roller height adjustment mechanism of claim 1, wherein, The rotating connection structure (3) includes a sleeve (31), a bearing (32) and a connecting ring (33). The sleeve (31) is fixedly sleeved on the outside of the mounting section (12). The inner ring of the bearing (32) is fixedly sleeved on the outside of the sleeve (31). The connecting ring (33) is fixedly sleeved on the outer ring of the bearing (32). The connecting ring (33) is used to fix the floating roller (5).

9. A bridge drive mechanism for a harvester, characterized by The harvester includes a floating roller (5) and a harvester floating roller height adjustment mechanism according to any one of claims 1-8, wherein the floating roller (5) is fixedly sleeved on the rotating connection structure (3), and the floating roller (5) can rotate circumferentially around the mounting section (12) through the rotating connection structure (3).

10. A harvester characterized by Includes the bridge transmission mechanism for harvesters as described in claim 9.

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