A harvester folding ladder and harvester

Abstract

The utility model relates to a kind of harvester folding ladder and harvester, and the harvester folding ladder includes fixed ladder split body, folding ladder split body and gas spring, the folding ladder split body is hinged with the lower half part side wall of fixed ladder split body by connecting rod assembly, one end of the gas spring is hinged with connecting rod assembly, the other end of the gas spring is hinged with the lower half part side wall of fixed ladder split body;When the folding ladder split body is in unfolded state, the gas spring is in compressed state, when the folding ladder split body is in folding state, the gas spring is in elongation state.The utility model's harvester folding ladder, by setting fixed ladder split body and folding ladder split body, folding ladder split body can be folded or unfolded relative to fixed ladder split body, can solve the problem that the pedal ladder is easily damaged by knocking in field.Fixing ladder split body is provided with gas spring, realizes the power-assisted function when pedal ladder folds, and folding locking function can also be realized, simple structure, need not to set additional locking mechanism.

Description

Technical Field

[0001] This utility model relates to the technical field of agricultural machinery, specifically to a folding ladder for a harvester and a harvester. Background Technology

[0002] Currently, most ladders used on harvesters are fixed after being assembled with the vehicle body, although some are folding. Fixed ladders cannot be folded, affecting the machine's maneuverability; folding ladders generally use connecting rods and locking mechanisms for fastening, making them complex, inconvenient to operate, and requiring significant force to unfold and fold. Utility Model Content

[0003] This utility model provides a folding ladder for a harvester and a harvester in order to solve one or more technical problems existing in the prior art.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A folding ladder for a harvester includes a fixed ladder body, a folding ladder body, and a gas spring. The folding ladder body is hinged to the lower half of the side wall of the fixed ladder body through a connecting rod assembly. One end of the gas spring is hinged to the connecting rod assembly, and the other end of the gas spring is hinged to the lower half of the side wall of the fixed ladder body. When the folding ladder body is in the unfolded state, the gas spring is in the compressed state. When the folding ladder body is in the folded state, the gas spring is in the extended state.

[0005] The beneficial effects of this utility model are as follows: The folding ladder for harvesters of this utility model, by setting up a fixed ladder section and a folding ladder section, allows the folding ladder section to be folded or unfolded relative to the fixed ladder section, thus solving the problem of easy bumping and damage to the treadmill ladder in the field. The fixed ladder section is equipped with a gas spring, which not only provides assistance when folding the treadmill ladder but also enables a folding locking function. The structure is simple and does not require an additional locking mechanism.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Furthermore, the linkage assembly includes a first linkage, one end of which is hinged to the middle of the side wall of the fixed ladder section near the rear side, and the other end of which is hinged to the upper end of the folding ladder section. One end of the gas spring is hinged to the first linkage near one end, and the other end of the gas spring is hinged to the middle of the lower half of the side wall of the fixed ladder section.

[0008] The beneficial effects of adopting the above-mentioned further solution are: by setting a first connecting rod and assembling the gas spring in the middle position of the lower half side wall of the first connecting rod and the fixed body, the gas spring can move in extension and retraction with the movement of the first connecting rod, making the assembly structure compact and reliable, and facilitating folding with the assistance of the gas spring.

[0009] Furthermore, the gas spring is located below the first connecting rod, and one end of the first connecting rod is provided with a connecting plate, with one end of the gas spring hinged to the connecting plate.

[0010] The beneficial effect of adopting the above-mentioned further solution is that by reasonably limiting the position and angle between the gas spring and the first connecting rod, the gas spring can be used more smoothly and reliably.

[0011] Furthermore, the linkage assembly includes two first linkages, with one first linkage hinged to each of the left and right side walls of the fixed ladder section, and the other ends of the two first linkages respectively hinged to the upper end of the folding ladder section; at least one of the first linkages is hinged to the gas spring.

[0012] The beneficial effect of adopting the above-mentioned further solution is that by setting two first connecting rods, the assembly between the folding ladder parts and the fixed ladder parts is more stable and reliable.

[0013] Furthermore, a first hinge shaft is provided on the side wall of the fixed ladder section, and a second hinge shaft is provided on the upper side of the folding ladder section. A first hinge sleeve and a second hinge sleeve are respectively provided at the upper and lower ends of the first connecting rod. The first hinge sleeve at one end of the first connecting rod is sleeved on the first hinge shaft through a first bushing and is limited by a limiting component. The second hinge sleeve at the other end of the first connecting rod is sleeved on the second hinge shaft through a second bushing and is limited by a limiting component.

[0014] The beneficial effect of adopting the above-mentioned further solution is that: hinge sleeves are respectively provided at both ends of the first connecting rod, which facilitates hinge connection with the fixed ladder part and the folding ladder part.

[0015] Furthermore, the linkage assembly also includes a second linkage arranged parallel to the first linkage. One end of the second linkage is hinged to the lower end of the side wall of the fixed ladder section near the rear side, and the other end of the second linkage is hinged to the middle of the side of the folding ladder section.

[0016] The beneficial effects of adopting the above-mentioned further solution are: by setting a second connecting rod, the assembly between the fixed ladder section and the folding ladder section is more stable and reliable, and the use is safer.

[0017] Furthermore, the linkage assembly includes two second linkages, with one second linkage hinged to each of the left and right side walls of the fixed ladder section, and the lower ends of the two second linkages respectively hinged to the middle of the folding ladder section.

[0018] The beneficial effect of adopting the above-mentioned further solution is that by setting two second connecting rods, the assembly between the fixed ladder section and the folding ladder section is more stable and reliable.

[0019] Furthermore, a third hinge shaft is provided on the rear side of the lower end of the side wall of the fixed ladder segment, and a fourth hinge shaft is provided in the middle of the folding ladder segment. A third hinge sleeve and a fourth hinge sleeve are respectively provided at both ends of the second connecting rod. The third hinge sleeve at one end of the second connecting rod is sleeved on the third hinge shaft through a third bushing and is limited by a limiting component. The fourth hinge sleeve at the other end of the second connecting rod is sleeved on the fourth hinge shaft through a fourth bushing and is limited by a limiting component.

[0020] The beneficial effect of adopting the above-mentioned further solution is that hinge sleeves are respectively provided at both ends of the second connecting rod, which facilitates hinge connection with the fixed ladder part and the folding ladder part.

[0021] Furthermore, a buffer column is provided on the rear side of the folding ladder section or the front side of the fixed ladder body.

[0022] The beneficial effect of adopting the above-mentioned further solution is that the setting of the buffer column provides a certain buffering effect when the folding ladder and the fixed ladder are folded and unfolded, thus avoiding damage caused by rigid connection.

[0023] This utility model also provides a harvester, including the above-mentioned harvester folding ladder, and a harvester body, wherein the fixed ladder is separately installed on the harvester body.

[0024] The beneficial effects of this utility model are: the harvester of this utility model can realize the folding function of the treadmill ladder, solve the problems of poor machine passability and easy damage, and also facilitate the folding and unfolding of the folding ladder parts by the workers. The folding ladder parts and the fixed ladder parts can be locked together by gas springs, which makes the structure more stable. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of the unfolded state of the folding ladder of the harvester according to this utility model;

[0026] Figure 2 for Figure 1 Enlarged structural diagram of section A in the middle;

[0027] Figure 3 This is a three-dimensional structural diagram of the folding ladder of the harvester of this utility model in its folded state;

[0028] Figure 4 This is a side view of the unfolded folding ladder of the harvester according to this utility model. Figure 1 ;

[0029] Figure 5 This is a side view of the folding ladder of the harvester in its folded state. Figure 1 ;

[0030] Figure 6 This is a front view structural diagram of the unfolded state of the folding ladder of the harvester according to this utility model;

[0031] Figure 7 This is a front view structural diagram of the folding ladder of the harvester of this utility model in its folded state;

[0032] Figure 8 This is a side view of the unfolded folding ladder of the harvester according to this utility model. Figure 2 ;

[0033] Figure 9 This is a side view of the folding ladder of the harvester in its folded state. Figure 2 ;

[0034] Figure 10 This is a schematic diagram of the split structure during the assembly process of the folding ladder for the harvester of this utility model.

[0035] The attached diagram lists the components represented by each number as follows:

[0036] 1. Fixed ladder component; 11. First hinge shaft; 12. Second hinge shaft; 13. Connecting column; 14. First bushing; 15. Second bushing;

[0037] 2. Folding ladder (split parts); 21. Third hinge axis; 22. Fourth hinge axis; 23. Third bushing; 24. Fourth bushing;

[0038] 3. Gas spring;

[0039] 4. First connecting rod; 41. First hinge sleeve; 42. Second hinge sleeve;

[0040] 5. Second connecting rod; 51. Third hinge sleeve; 52. Fourth hinge sleeve;

[0041] 6. Flat washer; 61. Bolt; 7. Buffer post;

[0042] 8. Handle; 81. Pedal; 82. Armrest. Detailed Implementation

[0043] The principles and features of this utility model are described below. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0044] Example 1

[0045] like Figures 1-10As shown, a folding ladder for a harvester according to this embodiment includes a fixed ladder section 1, a folding ladder section 2, and a gas spring 3. The folding ladder section 2 is hinged to the lower half of the side wall of the fixed ladder section 1 via a connecting rod assembly. One end of the gas spring 3 is hinged to the connecting rod assembly, and the other end of the gas spring 3 is hinged to the lower half of the side wall of the fixed ladder section 1. When the folding ladder section 2 is in the unfolded state, it is connected to the lower end of the fixed ladder section 1, and the gas spring 3 is in a compressed state. When the folding ladder section 2 is in the folded state, it overlaps with the fixed ladder section 1, and the gas spring 3 is in an extended state, with the tilt direction of the gas spring 3 being the same as or close to the tilt direction of the fixed ladder section 1.

[0046] The fixed ladder section 1 and the folding ladder section 2 can adopt existing folding ladder structures, with the folding ladder section 2 folding down from the lower part of the fixed ladder section 1. In this embodiment, the fixed ladder section 1 includes two side plates and multi-step treads 81, with the two side plates fixed to the left and right sides of the multi-step treads 81 respectively, serving as the side walls of the fixed ladder section 1. The folding ladder section 2 includes a U-shaped support rod and multi-step treads 81 fixed between the U-shaped support rod. The U-shaped support rod of the folding ladder section 2 can be hinged to the fixed ladder section 1 via a connecting rod assembly. The front side of the U-shaped support rod of the folding ladder section 2 is also provided with a handle 8, facilitating the folding and unfolding of the folding ladder section 2 and the use of the folding ladder by the workers. One end of the U-shaped support rod is also provided with a handrail 82 for workers to hold onto.

[0047] The linkage assembly in this embodiment can also be an existing linkage assembly for folding ladders. In this application, a gas spring 3 is used to hinge the linkage assembly to the fixed ladder body 1 to achieve the function of this embodiment. The hinge method at both ends of the gas spring 3 can be a ball joint structure or other hinge structure, as long as the gas spring 3 is not restricted by the hinge position during the extension and retraction process.

[0048] The harvester folding ladder of this embodiment, by setting up a fixed ladder section and a folding ladder section, allows the folding ladder section to be folded or unfolded relative to the fixed ladder section, thus solving the problem of the treadmill ladder being easily damaged by bumps in the field. The fixed ladder section is equipped with a gas spring, which not only provides assistance when the treadmill ladder is folded, but also provides a folding locking function. The structure is simple and does not require an additional locking mechanism.

[0049] Example 2

[0050] Based on Embodiment 1, this embodiment provides an alternative solution for the linkage assembly. For example... Figures 1-10As shown, the linkage assembly in this embodiment includes a first linkage 4. One end of the first linkage 4 is hinged to the middle of the side wall of the fixed ladder section 1 near the rear side, and the other end of the first linkage 4 is hinged to the upper end of the folding ladder section 2. One end of the gas spring 3 is hinged to the first linkage 4 near one end, and the other end of the gas spring 3 is hinged to the middle of the lower half of the side wall of the fixed ladder section 1. By setting the first linkage and assembling the gas spring at the middle position of the lower half of the side wall of the fixed ladder section, the gas spring can extend and retract with the movement of the first linkage, making the assembly structure compact and reliable, and facilitating folding with the assistance of the gas spring.

[0051] Preferred, such as Figure 1 , Figures 3 to 10 As shown, the linkage assembly includes two first linkages 4. One first linkage 4 is hinged to each of the left and right side walls of the fixed ladder section 1, and the other ends of the two first linkages 4 are respectively hinged to the upper end of the folding ladder section 2. At least one first linkage 4 is hinged to a gas spring 3; for stability, gas springs 3 can also be installed on both first linkages 4. By setting two first linkages, the assembly between the folding ladder section and the fixed ladder section becomes more stable and reliable.

[0052] In this embodiment, the other end of the first connecting rod 4 is hinged to the upper outer side of the folding ladder section 2. One end of the gas spring 3 is specifically hinged below the first connecting rod 4, near one end. A connecting post 13 can be fixedly installed on the side wall of the fixed ladder section 1, and the other end of the gas spring 3 can be hinged to the connecting post 13. The connecting post 13 ensures that both ends of the gas spring 3 are at the same height relative to the fixed ladder section 1, making the folding and unfolding process of the folding ladder section 2 smoother.

[0053] When the folding ladder section 2 and the fixed ladder section 1 are in the unfolded state, one end of the first connecting rod 4 in this embodiment is located above and behind the other end. When the folding ladder section 2 and the fixed ladder section 1 are in the folded state, one end of the first connecting rod 4 in this embodiment is located below and behind the other end.

[0054] Example 3

[0055] Based on Embodiment 1 or Embodiment 2, this embodiment provides a specific solution for a gas spring 3. For example... Figure 1 As shown, the gas spring 3 is located below the first connecting rod 4. One end of the first connecting rod 4 has a connecting plate, and one end of the gas spring 3 is hinged to the connecting plate. When the folding ladder section 2 is unfolded, the angle between the gas spring 3 and the first connecting rod 4 is an acute angle. By reasonably limiting the position and angle between the gas spring and the first connecting rod, the gas spring operates more smoothly and reliably during use.

[0056] Example 4

[0057] Based on Embodiment 2 or Embodiment 3, this embodiment provides a hinged connection scheme for the first link 4. For example... Figure 10 As shown, the fixed ladder section 1 has a first hinge shaft 11 on its side wall, and the folding ladder section 2 has a second hinge shaft 12 on its upper side. The upper and lower ends of the first connecting rod 4 are respectively provided with a first hinge sleeve 41 and a second hinge sleeve 42. The first hinge sleeve 41 at one end of the first connecting rod 4 is sleeved on the first hinge shaft 11 through a first bushing 14 and limited by a limiting component. The second hinge sleeve 42 at the other end of the first connecting rod 4 is sleeved on the second hinge shaft 12 through a second bushing 15 and limited by a limiting component. The hinge sleeves at both ends of the first connecting rod facilitate hinge connection with the fixed ladder section and the folding ladder section.

[0058] Specifically, the first hinge shaft 11 and the second hinge shaft 12 extend to the left and right respectively. The first connecting rod 4 can rotate on the first hinge shaft 11 via the first hinge sleeve 41 and on the second hinge shaft 12 via the second hinge sleeve 42.

[0059] Among them, such as Figure 2 As shown, the limiting component includes a flat washer 6 and a bolt 61. The flat washer 6 is fixed to the first hinge shaft 11 or the second hinge shaft 12 by the bolt 61, and the periphery of the flat washer 6 covers the first hinge sleeve 41 or the second hinge sleeve 42 to limit the first hinge shaft 11 or the second hinge shaft 12 and prevent the first hinge sleeve 41 or the second hinge sleeve 42 from coming off the first hinge shaft 11 or the second hinge shaft 12.

[0060] Example 5

[0061] Based on any of Embodiments 2 to 4, this embodiment provides a preferred solution for a linkage assembly. For example... Figure 1 , Figures 3 to 10 As shown, the linkage assembly also includes a second linkage 5 arranged parallel to the first linkage 4. One end of the second linkage 5 is hinged to the lower end of the side wall of the fixed ladder section 1 near the rear side, and the other end of the second linkage 5 is hinged to the middle of the side of the folding ladder section 2. By setting the second linkage, the assembly between the fixed ladder section and the folding ladder section is more stable and reliable, and the use is safer.

[0062] Preferred, such as Figure 6 , Figure 7 and Figure 10As shown, the linkage assembly includes two second linkages 5. One second linkage 5 is hinged to each of the left and right side walls of the fixed ladder section 1, and the lower ends of the two second linkages 5 are respectively hinged to the middle of the folding ladder section 2. By providing two second linkages, the assembly between the fixed ladder section and the folding ladder section becomes more stable and reliable.

[0063] The other end of the second link 5 is hinged to the outer side of the middle part of the folding ladder section 2. The first link 4, the second link 5, and other parts form a parallel four-bar structure to realize the unfolding of the folding ladder section relative to the fixed ladder section.

[0064] Example 6

[0065] Based on Embodiment 5, this embodiment provides an optional hinged connection scheme for the second link 5. For example... Figure 10 As shown, a third hinge shaft 21 is provided on the rear side of the lower end of the side wall of the fixed ladder section 1, and a fourth hinge shaft 22 is provided in the middle of the folding ladder section 2. A third hinge sleeve 51 and a fourth hinge sleeve 52 are respectively provided at both ends of the second connecting rod 5. The third hinge sleeve 51 at one end of the second connecting rod 5 is fitted onto the third hinge shaft 21 via a third bushing 23 and is limited by a limiting component. The fourth hinge sleeve 52 at the other end of the second connecting rod 5 is fitted onto the fourth hinge shaft 22 via a fourth bushing 24 and is limited by a limiting component. The hinge sleeves at both ends of the second connecting rod facilitate hinge connection with the fixed ladder section and the folding ladder section.

[0066] Specifically, the third hinge shaft 21 and the fourth hinge shaft 22 extend to the left and right respectively. The second connecting rod 5 can rotate on the third hinge shaft 21 via the third hinge sleeve 51, and on the fourth hinge shaft 22 via the fourth hinge sleeve 52.

[0067] Among them, such as Figure 2 As shown, the limiting assembly includes a flat washer 6 and a bolt 61. The flat washer 6 is fixed to the third hinge shaft 21 or the fourth hinge shaft 22 by the bolt 61, and the periphery of the flat washer 6 covers the third hinge sleeve 51 or the fourth hinge sleeve 52 to limit the third hinge shaft 21 or the fourth hinge shaft 22 and prevent the third hinge sleeve 51 or the fourth hinge sleeve 52 from coming off the third hinge shaft 21 or the fourth hinge shaft 22.

[0068] In this embodiment, a connecting sleeve can be fitted onto the U-shaped support rod of the fixed ladder section 1. A hinge shaft is fixed to the outside of the connecting sleeve for hinged connection of the connecting rod. The tread 81 can be fixed to the corresponding connecting sleeve.

[0069] Example 7

[0070] Based on any of the above embodiments, this embodiment provides a buffering scheme between the fixed ladder section 1 and the folding ladder section 2. For example... Figure 1 , Figures 3-5 , Figures 8-10 As shown, a buffer post 7 is provided on the rear side of the folding ladder section 2 or the front side of the fixed ladder body 1. The buffer post provides a certain buffering effect when the folding ladder section and the fixed ladder section are folded and unfolded, avoiding damage caused by rigid connection.

[0071] Among them, buffer posts 7 can be set on the left and right sides of the rear side of the folding ladder split 2 or on the left and right sides of the front side of the fixed ladder body 1. The buffer posts 7 can be made of rubber.

[0072] Example 8

[0073] This embodiment provides a harvester, including a harvester folding ladder of any of the above embodiments, and also includes a harvester body, wherein the fixed ladder part 1 is installed on the harvester body.

[0074] The harvester in this embodiment can realize the folding function of the trolley ladder, which solves the problems of poor machine passability and easy damage. It also makes it convenient for workers to fold and unfold the folding ladder parts. The folding ladder parts and the fixed ladder parts can be locked together by gas springs, which makes the structure more stable.

[0075] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0076] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0077] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0078] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0079] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0080] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A folding ladder for a harvester, characterized in that, The ladder includes a fixed ladder section, a folding ladder section, and a gas spring. The folding ladder section is hinged to the lower half of the side wall of the fixed ladder section via a connecting rod assembly. One end of the gas spring is hinged to the connecting rod assembly, and the other end of the gas spring is hinged to the lower half of the side wall of the fixed ladder section. When the folding ladder section is in the unfolded state, the gas spring is in the compressed state, and when the folding ladder section is in the folded state, the gas spring is in the extended state.

2. The folding ladder for a harvester according to claim 1, characterized in that, The linkage assembly includes a first linkage, one end of which is hinged to the middle of the side wall of the fixed ladder section near the rear side, and the other end of which is hinged to the upper end of the folding ladder section. One end of the gas spring is hinged to the first linkage near one end, and the other end of the gas spring is hinged to the middle of the lower half of the side wall of the fixed ladder section.

3. A folding ladder for a harvester according to claim 2, characterized in that, The gas spring is located below the first connecting rod, and one end of the first connecting rod is provided with a connecting plate, and one end of the gas spring is hinged to the connecting plate.

4. A folding ladder for a harvester according to claim 2, characterized in that, The linkage assembly includes two first linkages, one of which is hinged to each of the left and right side walls of the fixed ladder section, and the other ends of the two first linkages are respectively hinged to the upper end of the folding ladder section; at least one of the first linkages is hinged to the gas spring.

5. A folding ladder for a harvester according to any one of claims 2 to 4, characterized in that, The fixed ladder section has a first hinge shaft on its side wall, and the folding ladder section has a second hinge shaft on its upper side. The upper and lower ends of the first connecting rod are respectively provided with a first hinge sleeve and a second hinge sleeve. The first hinge sleeve at one end of the first connecting rod is sleeved on the first hinge shaft through a first bushing and is limited by a limiting component. The second hinge sleeve at the other end of the first connecting rod is sleeved on the second hinge shaft through a second bushing and is limited by a limiting component.

6. A folding ladder for a harvester according to any one of claims 2 to 4, characterized in that, The linkage assembly also includes a second linkage arranged parallel to the first linkage. One end of the second linkage is hinged to the lower end of the side wall of the fixed ladder section near the rear side, and the other end of the second linkage is hinged to the middle of the side of the folding ladder section.

7. A folding ladder for a harvester according to claim 6, characterized in that, The linkage assembly includes two second linkages. A second linkage is hinged to each of the left and right side walls of the fixed ladder section, and the lower ends of the two second linkages are respectively hinged to the middle of the folding ladder section.

8. A folding ladder for a harvester according to claim 6, characterized in that, The fixed ladder section has a third hinge shaft at the lower rear side of its side wall, and the folding ladder section has a fourth hinge shaft in the middle. The two ends of the second connecting rod are respectively provided with a third hinge sleeve and a fourth hinge sleeve. The third hinge sleeve at one end of the second connecting rod is sleeved on the third hinge shaft through a third bushing and is limited by a limiting component. The fourth hinge sleeve at the other end of the second connecting rod is sleeved on the fourth hinge shaft through a fourth bushing and is limited by a limiting component.

9. A folding ladder for a harvester according to any one of claims 1 to 4, characterized in that, A buffer column is provided on the rear side of the folding ladder section or the front side of the fixed ladder body.

10. A harvester, characterized in that, The harvester folding ladder includes any one of claims 1 to 9, and also includes a harvester body, wherein the fixed ladder is separately installed on the harvester body.

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