Corn header protection mechanism and harvester

Abstract

The utility model relates to the technical field of harvesting machinery, in particular to a corn header protection mechanism and a harvester, which comprise two side mounting plates fixedly mounted on two sides of a rack respectively, a baffle mounting shaft is arranged between the two side mounting plates, two ends of the baffle mounting shaft are connected with the two side mounting plates respectively, and the baffle mounting shaft is connected with the two side mounting plates. A plurality of baffles are installed on the baffle installation shaft side by side, the top ends of the baffles are rotationally connected with the baffle installation shaft, baffle limiting shafts used for limiting the overturning angles of the baffles are arranged on the rear sides of the baffles, and the baffle limiting shafts and the baffle installation shaft are arranged in parallel at intervals. The utility model has the beneficial effects that the baffle plate limiting shaft is arranged on the rear side of the baffle plate mounting shaft to prevent the baffle plate from overturning backwards, so that the baffle plate can better block thrown materials, prevent the materials from flying backwards, prevent the materials from influencing the heat dissipation and the service life of parts, and improve the safety of a user.

Description

Technical Field

[0001] The utility model relates to the technical field of harvesting machinery, in particular to a corn cutting platform protection mechanism and a harvester. Background Art

[0002] At present, there is a phenomenon that the stem shredding protection on the harvester's cutting table is not in place, which will cause the material to be thrown backwards or outwards. In the prior art, in order to solve the above problems, the technical solution adopted is to install a rotating shaft at the rear of the cutting table, and rotatably set multiple baffles on the rotating shaft to block the material splashing backwards. However, during use, when the baffle is impacted by the shredded material at the front end, the baffle will turn backwards. Because the baffle can rotate around the baffle installation axis, the baffle will be caught when it encounters a protruding component and cannot fall down, which will cause some materials to not be blocked. When the material is thrown to the rear, it causes the rear components to accumulate weed debris and other debris, resulting in a poor working environment for the rear components, affecting the heat dissipation and service life of the components, causing user dissatisfaction; when the material is thrown to the side, the high-speed flying material may cause harm to farmers and cause safety hazards. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a corn cutting platform protection mechanism and a harvester to solve the above problems existing in the prior art.

[0004] The utility model provides a technical solution to the above-mentioned technical problems as follows: a corn cutting platform protection mechanism, comprising two side mounting plates respectively fixedly mounted on two sides of a frame, a baffle mounting shaft being provided between the two side mounting plates, two ends of the baffle mounting shaft being respectively connected to the two side mounting plates, a plurality of baffles being mounted in parallel on the baffle mounting shaft, the top end of the baffle being rotatably connected to the baffle mounting shaft, a baffle limiting shaft for limiting the flipping angle of the baffle being provided on the rear side of the baffle, the baffle limiting shaft being parallel to the baffle mounting shaft and being spaced apart.

[0005] The beneficial effect of the utility model is that the utility model installs a baffle limiting shaft on the rear side of the baffle installation shaft to prevent the baffle from flipping backwards, so that the baffle can better block the thrown material and prevent the material from flying backwards, avoiding the material from affecting the heat dissipation and service life of the components, thereby improving the safety of the user.

[0006] On the basis of the above technical solution, the present invention can also be improved as follows.

[0007] Furthermore, a plurality of middle mounting plates are arranged between the two side mounting plates, and the baffle mounting shaft passes through the middle mounting plates.

[0008] The beneficial effect of adopting the above further solution is that the provision of the middle mounting plate can effectively prevent the baffle mounting shaft from being deformed, thereby increasing the service life of the baffle mounting shaft.

[0009] Furthermore, the number of the middle mounting plates is at least two, and the baffle limiting shaft is mounted on the middle mounting plates.

[0010] The beneficial effect of adopting the above further solution is: installing the baffle limit shaft on the middle mounting plate can prevent the side mounting plate from receiving corresponding impact force when the baffle limit shaft is impacted by the baffle, thereby increasing the service life of the side mounting plate.

[0011] Furthermore, a plurality of groups of limit assemblies are fixedly provided on the baffle limit shaft, and each group of the limit assemblies includes two limit members, and the two limit members are respectively provided on both sides of the middle mounting plate.

[0012] The beneficial effect of adopting the above further solution is: the baffle plate limiting shaft is limited by the limiting member to prevent the baffle plate limiting shaft from moving in the axial direction.

[0013] Furthermore, the two middle mounting plates are symmetrically provided with first arc-shaped bar holes, and the two ends of the baffle limiting shaft are respectively slidably arranged in the first arc-shaped bar holes and can move along the length direction of the first arc-shaped bar holes. A first return torsion spring is sleeved on the baffle mounting shaft, and a first limit pin is fixedly provided on the middle mounting plate. One end of the first return torsion spring abuts against the side wall of the first limit pin toward the baffle limiting shaft, and the other end abuts against the upper wall of the baffle limiting shaft.

[0014] The beneficial effect of adopting the above-mentioned further scheme is: when the baffle is impacted by the material and rotates backward and contacts the baffle limiting shaft, the baffle limiting shaft can be pushed to slide upward in the first arc-shaped strip hole. After the impact disappears, the first return spring can push the baffle limiting shaft to reset, and the baffle limiting shaft pushes the baffle to reset. This structure prevents the baffle from flipping backward and can effectively prevent the material from splashing backward. At the same time, the first return spring can buffer the impact force on the baffle limiting shaft to prevent damage to the baffle limiting shaft.

[0015] Furthermore, two ends of the baffle limiting shaft are respectively connected to the two side mounting plates.

[0016] The beneficial effect of adopting the above further solution is that the two ends of the baffle plate limiting shaft are installed on the side mounting plate, the mounting structure is small and the structure is simple.

[0017] Furthermore, the two side mounting plates are symmetrically provided with second arc-shaped strip holes, and the two ends of the baffle limiting shaft are respectively slidably arranged in the second arc-shaped strip holes and can move along the length direction of the second arc-shaped strip holes. A second return torsion spring is sleeved on the baffle mounting shaft, and a second limit pin is fixedly provided on the side mounting plate, one end of the second return torsion spring abuts against the side wall of the second limit pin toward the baffle limiting shaft, and the other end abuts against the upper wall of the baffle limiting shaft.

[0018] The beneficial effect of adopting the above-mentioned further scheme is: when the baffle is impacted by the material and rotates backward and contacts the baffle limiting shaft, the baffle limiting shaft can be pushed to slide upward in the second arc-shaped strip hole. After the impact disappears, the second return spring can push the baffle limiting shaft to reset, and the baffle limiting shaft pushes the baffle to reset. This structure prevents the baffle from flipping backward and can effectively prevent the material from splashing backward. At the same time, the second return spring can buffer the impact force on the baffle limiting shaft to prevent damage to the baffle limiting shaft.

[0019] Furthermore, two spaced-apart rear supports are fixedly mounted on the stand on the rear side of the baffle mounting shaft, a guide rail with two ends extending toward the front and rear sides of the baffle mounting shaft respectively is provided between each of the rear supports and the baffle mounting shaft, a front support is slidably provided on the guide rail, an elastic tensioning mechanism for applying thrust to the front support is provided between the front support and the rear support, and the two ends of the baffle limiting shaft are respectively mounted on the two front supports.

[0020] The beneficial effect of adopting the above-mentioned further scheme is: when the baffle is impacted by the material and rotates backward and contacts the baffle limiting shaft, the baffle limiting shaft can be pushed to slide backward along the sliding groove; after the impact disappears, the elastic tensioning mechanism can push the baffle limiting shaft to reset, and the baffle limiting shaft pushes the baffle to reset. This structure prevents the baffle from flipping backward and can effectively prevent the material from splashing backward. At the same time, the elastic tensioning mechanism can buffer the impact force on the baffle limiting shaft to prevent damage to the baffle limiting shaft.

[0021] Furthermore, the elastic tensioning mechanism includes a screw and a spring, one end of the screw passes through and extends out of the front support, the other end of the screw is connected to the rear support, the spring is sleeved on the screw, and the spring is arranged between the front support and the rear support.

[0022] The beneficial effect of adopting the above further scheme is: when the baffle is impacted by the material and rotates backward and contacts the baffle limiting shaft, it can push the baffle limiting shaft to slide backward along the sliding groove, apply pressure to the spring, and after the impact disappears, the spring can push the baffle limiting shaft to reset, and the baffle limiting shaft pushes the baffle to reset, and the structure is simple.

[0023] The utility model solves the above technical problem and further provides a harvester, comprising the above-mentioned corn cutting platform protection mechanism.

[0024] The beneficial effect of adopting the above scheme is: by setting the baffle limit axis, the baffle is prevented from flipping backwards, so that the baffle can better block the thrown material, prevent the material from flying backwards, avoid the material affecting the heat dissipation and service life of the components, and improve the safety of the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the structure of the first embodiment of the utility model;

[0026] Figure 2 This is a schematic diagram of the structure of the second embodiment of the present utility model;

[0027] Figure 3 This is a schematic diagram of the structure of the third embodiment of the present utility model;

[0028] Figure 4 This is a schematic diagram of the installation structure on the middle installation plate in the third embodiment of the present utility model;

[0029] Figure 5 This is a schematic diagram of the structure of the fourth embodiment of the present utility model;

[0030] Figure 6 This is a schematic diagram of the installation structure on the side mounting plate in the fourth embodiment of the present utility model;

[0031] Figure 7 This is a schematic diagram of the structure of Embodiment 5 of the present utility model;

[0032] Figure 8 This is a bottom view of the fifth embodiment of the present utility model;

[0033] Fig. 9 This is a schematic diagram of the installation of the elastic tensioning mechanism in the fifth embodiment of the present utility model;

[0034] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0035] 1. Stand; 2. Side mounting plate; 3. Baffle mounting shaft; 4. Baffle; 5. Baffle limiting shaft; 6. Middle mounting plate; 7. Limiting member; 8. First arc-shaped strip hole; 9. First return torsion spring; 10. First limiting pin; 11. Second arc-shaped strip hole; 12. Second return torsion spring; 13. Second limiting pin; 14. Rear support; 15. Guide rail; 16. Front support; 17. Screw; 18. Spring; 19. Slide plate; 20. Limiting shaft mounting seat; 21. Nut; 22. Bushing; 23. Gasket; 24. Bolt; 25. Retaining ring. DETAILED DESCRIPTION

[0036] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0037] Embodiment 1

[0038] like Figure 1 As shown, this embodiment includes two side mounting plates 2 respectively fixedly mounted on both sides of the platform 1, and the side mounting plates 2 are detachably mounted on the platform 1 by bolts 24 and nuts 21. A baffle mounting shaft 3 is provided between the two side mounting plates 2, and cotter pins are provided at both ends of the baffle mounting shaft 3. The cotter pins are arranged on the side where the two side mounting plates 2 are away from each other, and a gasket 23 is provided between the cotter pin and the side mounting plate 2. The two ends of the baffle mounting shaft 3 are respectively connected to the two side mounting plates 2, and a plurality of baffles 4 are installed in parallel on the baffle mounting shaft 3. The top end of the baffle 4 is rotatably connected to the baffle mounting shaft 3, and the rear side of the baffle 4 is provided with a baffle limiting shaft 5 for limiting the flipping angle of the baffle 4, and the baffle limiting shaft 5 is parallel to the baffle mounting shaft 3 and spaced apart.

[0039] In this embodiment, a plurality of middle mounting plates 6 are arranged between the two side mounting plates 2. The middle mounting plates 6 are detachably mounted on the stand 1 by bolts 24. The baffle mounting shaft 3 passes through the middle mounting plates 6. By installing the middle mounting plates 6, the deformation of the baffle mounting shaft 3 can be effectively prevented, thereby improving the service life of the baffle mounting shaft 3.

[0040] In this embodiment, there are two middle mounting plates 6, and the baffle limiting shaft 5 is installed on the middle mounting plate 6. Installing the baffle limiting shaft 5 on the middle mounting plate 6 can prevent the side mounting plate 2 from receiving corresponding impact force when the baffle limiting shaft 5 is impacted by the baffle 4, thereby improving the service life of the side mounting plate 2.

[0041] Preferably, a plurality of groups of limit assemblies are fixedly provided on the baffle limit shaft 5, each group of the limit assemblies includes two limit members 7, and the two limit members 7 are respectively arranged on both sides of the middle mounting plate 6. In the present embodiment, the limit member 7 is a cotter pin, and a gasket 23 is provided between the cotter pin and the middle mounting plate 6. The baffle limit shaft 5 is limited by the cotter pin to prevent the baffle limit shaft 5 from moving in the axial direction.

[0042] Embodiment 2

[0043] like Figure 2As shown, this embodiment includes two side mounting plates 2 respectively fixedly mounted on both sides of the platform 1, and the side mounting plates 2 are detachably mounted on the platform 1 by bolts 24 and nuts 21. A baffle mounting shaft 3 is provided between the two side mounting plates 2, and cotter pins are provided at both ends of the baffle mounting shaft 3. The cotter pins are arranged on the side where the two side mounting plates 2 are away from each other, and a gasket 23 is provided between the cotter pin and the side mounting plate 2. The two ends of the baffle mounting shaft 3 are respectively connected to the two side mounting plates 2, and a plurality of baffles 4 are installed in parallel on the baffle mounting shaft 3. The top end of the baffle 4 is rotatably connected to the baffle mounting shaft 3, and the rear side of the baffle 4 is provided with a baffle limiting shaft 5 for limiting the flipping angle of the baffle 4, and the baffle limiting shaft 5 is parallel to the baffle mounting shaft 3 and spaced apart.

[0044] In this embodiment, both ends of the baffle plate limiting shaft 5 are connected to the two side mounting plates 2 respectively, and both ends of the baffle plate limiting shaft 5 are mounted on the side mounting plates 2, with fewer mounting structures and a simple structure.

[0045] Embodiment 3

[0046] like Figure 3 , Figure 4 As shown, this embodiment includes two side mounting plates 2 respectively fixedly mounted on both sides of the platform 1, and the side mounting plates 2 are detachably mounted on the platform 1 by bolts 24 and nuts 21. A baffle mounting shaft 3 is provided between the two side mounting plates 2, and cotter pins are provided at both ends of the baffle mounting shaft 3. The cotter pins are arranged on the side where the two side mounting plates 2 are away from each other, and a gasket 23 is provided between the cotter pin and the side mounting plate 2. The two ends of the baffle mounting shaft 3 are respectively connected to the two side mounting plates 2, and a plurality of baffles 4 are installed in parallel on the baffle mounting shaft 3. The top end of the baffle 4 is rotatably connected to the baffle mounting shaft 3, and the rear side of the baffle 4 is provided with a baffle limiting shaft 5 for limiting the flipping angle of the baffle 4, and the baffle limiting shaft 5 is parallel to the baffle mounting shaft 3 and spaced apart.

[0047] In this embodiment, the two middle mounting plates 6 are symmetrically provided with first arc-shaped strip holes 8, the center of the first arc-shaped strip holes 8 is on the axis of the baffle mounting shaft 3, and the two ends of the baffle limiting shaft 5 are respectively slidably arranged in the first arc-shaped strip holes 8 and can move along the length direction of the first arc-shaped strip holes 8. The baffle mounting shaft 3 is sleeved with a first return torsion spring 9. Specifically, the baffle mounting shaft 3 is rotatably sleeved with a shaft sleeve 22, and the first return torsion spring 9 is fixedly sleeved on the shaft sleeve 22. The middle mounting plate 6 is fixedly provided with a first limit pin 10, and one end of the first return torsion spring 9 The first limit pin 10 abuts against the side wall of the baffle limit shaft 5, and the other end abuts against the upper wall of the baffle limit shaft 5. When the baffle 4 is impacted by the material and rotates backward and contacts the baffle limit shaft 5, it can push the baffle limit shaft 5 to slide upward in the first arc-shaped bar hole 8. After the impact disappears, the first return spring 18 can push the baffle limit shaft 5 to reset, and the baffle limit shaft 5 pushes the baffle 4 to reset. This structure prevents the baffle 4 from flipping backward and can effectively prevent the material from splashing backward. At the same time, the first return spring 18 buffers the impact force on the baffle limit shaft 5 to prevent the baffle limit shaft 5 from being damaged.

[0048] Embodiment 4

[0049] like Figure 5 , Figure 6 As shown, this embodiment includes two side mounting plates 2 respectively fixedly mounted on both sides of the platform 1, and the side mounting plates 2 are detachably mounted on the platform 1 by bolts 24 and nuts 21. A baffle mounting shaft 3 is provided between the two side mounting plates 2, and cotter pins are provided at both ends of the baffle mounting shaft 3. The cotter pins are arranged on the side where the two side mounting plates 2 are away from each other, and a gasket 23 is provided between the cotter pin and the side mounting plate 2. The two ends of the baffle mounting shaft 3 are respectively connected to the two side mounting plates 2, and a plurality of baffles 4 are installed in parallel on the baffle mounting shaft 3. The top end of the baffle 4 is rotatably connected to the baffle mounting shaft 3, and the rear side of the baffle 4 is provided with a baffle limiting shaft 5 for limiting the flipping angle of the baffle 4, and the baffle limiting shaft 5 is parallel to the baffle mounting shaft 3 and spaced apart.

[0050] In this embodiment, the two side mounting plates 2 are symmetrically provided with second arc-shaped strip holes 11, the center of the second arc-shaped strip holes 11 is on the axis of the baffle mounting shaft 3, the two ends of the baffle limiting shaft 5 are respectively slidably arranged in the second arc-shaped strip holes 11 and can move along the length direction of the second arc-shaped strip holes 11, and the baffle mounting shaft 3 is sleeved with a second return torsion spring 12. Specifically, the baffle mounting shaft 3 is rotatably sleeved with a shaft sleeve 22, and the second return torsion spring 12 is fixedly sleeved on the shaft sleeve 22. The side mounting plate 2 is fixedly provided with a second limit pin shaft 13, and the second return torsion spring 12 One end of the baffle plate 4 abuts against the side wall of the second limiting pin 13 facing the baffle limiting shaft 5, and the other end abuts against the upper wall of the baffle limiting shaft 5. When the baffle 4 is impacted by the material and rotates backward and contacts the baffle limiting shaft 5, it can push the baffle limiting shaft 5 to slide upward in the second arc-shaped bar hole 11. After the impact disappears, the second return spring 18 can push the baffle limiting shaft 5 to reset, and the baffle limiting shaft 5 pushes the baffle 4 to reset. This structure prevents the baffle 4 from flipping backward and can effectively prevent the material from splashing backward. At the same time, the second return spring 18 can buffer the impact force on the baffle limiting shaft 5 to prevent the baffle limiting shaft 5 from being damaged.

[0051] Embodiment 5

[0052] like Figure 7 , Figure 8 , Fig. 9 As shown, this embodiment includes two side mounting plates 2 respectively fixedly mounted on both sides of the platform 1, and the side mounting plates 2 are detachably mounted on the platform 1 by bolts 24 and nuts 21. A baffle mounting shaft 3 is provided between the two side mounting plates 2, and cotter pins are provided at both ends of the baffle mounting shaft 3. The cotter pins are arranged on the side where the two side mounting plates 2 are away from each other, and a gasket 23 is provided between the cotter pin and the side mounting plate 2. The two ends of the baffle mounting shaft 3 are respectively connected to the two side mounting plates 2, and a plurality of baffles 4 are installed in parallel on the baffle mounting shaft 3. The top end of the baffle 4 is rotatably connected to the baffle mounting shaft 3, and the rear side of the baffle 4 is provided with a baffle limiting shaft 5 for limiting the flipping angle of the baffle 4, and the baffle limiting shaft 5 is parallel to the baffle mounting shaft 3 and spaced apart.

[0053] In this embodiment, two spaced-apart rear supports 14 are fixedly mounted on the stand 1 on the rear side of the baffle mounting shaft 3, a guide rail 15 with two ends extending toward the front and rear sides of the baffle mounting shaft 3 respectively is provided between each of the rear supports 14 and the baffle mounting shaft 3, a front support 16 is slidably provided on the guide rail 15, an elastic tensioning mechanism for applying thrust to the front support 16 is provided between the front support 16 and the rear support 14, and both ends of the baffle limiting shaft 5 are respectively mounted on the two front supports 16.

[0054] Specifically. The elastic tensioning mechanism includes a screw rod 17 and a spring 18. One end of the screw rod 17 passes through and extends out of the front support 16, and the other end of the screw rod 17 is connected to the rear support 14. Specifically, two nuts 21 are threadedly connected to the other end of the screw rod 17. The two nuts 21 are respectively arranged on both sides of the rear support 14 to limit the relative position of the screw rod 17 and the rear support 14. The spring 18 is sleeved on the screw rod 17, and the spring 18 is arranged between the front support 16 and the rear support 14. The front support 16 is provided with a slide plate 19 fixedly connected to the front support 16, and the other end of the spring 18 is provided with a retaining ring 25 sleeved on the screw rod 17, and the retaining ring 25 is provided with a nut 21. The front support 16 is provided with a slide plate 19 fixedly connected thereto. The guide rail 15 includes two guide rail seats arranged opposite to each other at intervals, and the two guide rail seats are provided with slide grooves on the sides facing each other. The slide plate 19 is slidably provided on the slide groove, and a limit shaft mounting seat 20 is fixedly provided on the slide plate 19. The end of the baffle limit shaft 5 is provided on the limit shaft mounting seat 20. When the baffle 4 is impacted by the material and rotates backward and contacts the baffle limit shaft 5, the baffle limit shaft 5 can be pushed to slide backward along the sliding groove, and pressure is applied to the spring 18. After the impact disappears, the spring 18 can push the baffle limit shaft 5 to reset, and the baffle limit shaft 5 pushes the baffle 4 to reset. The structure is simple.

[0055] Embodiment 7

[0056] This embodiment discloses a harvester, including a corn header protection mechanism as described in any one of the above-mentioned embodiments 1 to 5.

[0057] The utility model installs a baffle limiting shaft 5 on the rear side of the baffle installation shaft 3 to prevent the baffle 4 from flipping backwards, so that the baffle 4 can better block the thrown materials and prevent the materials from flying backwards, avoiding the materials from affecting the heat dissipation and service life of the components, thereby improving the safety of the users.

[0058] In the description of the present invention, it should be understood that the terms "center", "length", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "inside", "outside", "peripheral", "circumferential" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred system or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0059] In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0060] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A corn header protection mechanism, characterized in that: The invention comprises two side mounting plates (2) respectively fixedly mounted on two sides of a platform (1); a baffle mounting shaft (3) is arranged between the two side mounting plates (2); two ends of the baffle mounting shaft (3) are respectively connected to the two side mounting plates (2); a plurality of baffles (4) are arranged in parallel on the baffle mounting shaft (3); the top end of the baffle (4) is rotatably connected to the baffle mounting shaft (3); a baffle limiting shaft (5) for limiting the flipping angle of the baffle (4) is arranged on the rear side of the baffle (4); the baffle limiting shaft (5) is parallel to the baffle mounting shaft (3) and is arranged at a distance.

2. A corn header protection mechanism according to claim 1, characterized in that: A plurality of middle mounting plates (6) are arranged between the two side mounting plates (2), and the baffle mounting shaft (3) passes through the middle mounting plates (6).

3. A corn header protection mechanism according to claim 2, characterized in that: The number of the middle mounting plates (6) is at least two, and the baffle limiting shaft (5) is mounted on the middle mounting plates (6).

4. A corn header protection mechanism according to claim 3, characterized in that: A plurality of groups of limit assemblies are fixedly arranged on the baffle limit shaft (5), each group of the limit assemblies comprises two limit members (7), and the two limit members (7) are respectively arranged on both sides of the middle mounting plate (6).

5. A corn header protection mechanism according to claim 3, characterized in that: The two middle mounting plates (6) are symmetrically provided with first arc-shaped strip holes (8), and the two ends of the baffle plate limiting shaft (5) are respectively slidably arranged in the first arc-shaped strip holes (8) and can move along the length direction of the first arc-shaped strip holes (8). The baffle plate mounting shaft (3) is sleeved with a first return torsion spring (9), and the middle mounting plate (6) is fixedly provided with a first limit pin shaft (10), one end of the first return torsion spring (9) abuts against the side wall of the first limit pin shaft (10) facing the baffle plate limiting shaft (5), and the other end abuts against the upper wall of the baffle plate limiting shaft (5).

6. A corn header protection mechanism according to claim 1 or 2, characterized in that: The two ends of the baffle limiting shaft (5) are respectively connected to the two side mounting plates (2).

7. A corn header protection mechanism according to claim 5, characterized in that: The two side mounting plates (2) are symmetrically provided with second arc-shaped strip holes (11), and the two ends of the baffle plate limiting shaft (5) are respectively slidably arranged in the second arc-shaped strip holes (11) and can move along the length direction of the second arc-shaped strip holes (11). The baffle plate mounting shaft (3) is sleeved with a second return torsion spring (12), and the side mounting plate (2) is fixedly provided with a second limit pin shaft (13), one end of the second return torsion spring (12) abuts against the side wall of the second limit pin shaft (13) facing the baffle plate limiting shaft (5), and the other end abuts against the upper wall of the baffle plate limiting shaft (5).

8. A corn header protection mechanism according to claim 1 or 2, characterized in that: Two spaced-apart rear supports (14) are fixedly mounted on the stand (1) at the rear side of the baffle mounting shaft (3); a guide rail (15) is provided between each of the rear supports (14) and the baffle mounting shaft (3), with two ends extending toward the front and rear sides of the baffle mounting shaft (3) respectively; a front support (16) is slidably mounted on the guide rail (15); an elastic tensioning mechanism for applying a thrust to the front support (16) is provided between the front support (16) and the rear support (14); and the two ends of the baffle limiting shaft (5) are respectively mounted on the two front supports (16).

9. A corn header protection mechanism according to claim 8, characterized in that: The elastic tensioning mechanism comprises a screw rod (17) and a spring (18); one end of the screw rod (17) passes through and extends out of the front support (16); the other end of the screw rod (17) is connected to the rear support (14); the spring (18) is sleeved on the screw rod (17), and the spring (18) is arranged between the front support (16) and the rear support (14).

10. A harvester, characterized in that: It comprises a corn header protection mechanism as described in any one of claims 1 to 9.

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