Axle anti-wrap device for a bridge and harvester

Abstract

The utility model discloses a kind of anti-entangling device for overbridge upper shaft and harvester, anti-entangling device for overbridge upper shaft includes overbridge upper shaft, support frame and first anti-entangling component, overbridge upper shaft is rotatably installed on overbridge shell and is sequentially spaced with at least two sprocket bodies along length direction, support frame is located on overbridge shell and is located at the inside of overbridge upper shaft, first anti-entangling component is equipped between any two adjacent sprocket bodies, first anti-entangling component has first anti-entangling cover, first anti-entangling cover is set around the outside of overbridge upper shaft, and the upper and lower ends of first anti-entangling cover respectively correspondingly extend to the upper and lower sides of support frame, the upper and lower ends of first anti-entangling cover are detachably connected with support frame, then first anti-entangling cover, support frame and overbridge shell are fixedly arranged, with strong impact resistance, stable connection, in use process, first anti-entangling cover can be conveniently disassembled and repaired, and first anti-entangling cover can also be prevented from falling off, suitable for long-time operation.

Description

Technical Field

[0001] This utility model belongs to the field of agricultural machinery technology, specifically relating to an anti-tangling device for the upper shaft of a bridge and a harvester. Background Technology

[0002] When combine harvesters are harvesting wet, lodged, or tall-stalked crops, the upper axle of the harvester's threshing bridge is easily entangled by crop stalks, causing blockage of the entire bridge and even damage to related parts. To solve this problem, the existing technical solution is to install a protective cover on the outside of the upper axle of the threshing bridge. The inner diameter of the protective cover is slightly larger than the diameter of the bearing seat and sprocket boss of the upper axle of the threshing bridge, allowing the protective cover and the upper axle of the threshing bridge to rotate relative to each other. Considering the need for disassembly and maintenance, the protective cover is composed of upper and lower shells assembled by bolts. During the operation of the harvester, the protective cover is continuously impacted by stalks and grains, and its bolts are prone to falling off. Once the bolts fall off, the upper and lower shells will separate and fall off the upper axle of the threshing bridge, eventually entering the harvester's threshing and separating system, causing damage to the harvester. Utility Model Content

[0003] In view of the above-mentioned defects or deficiencies, this utility model provides an anti-entanglement device for the upper shaft of a bridge and a harvester, aiming to solve the technical problem that the existing anti-entanglement device is easy to fall off the upper shaft of the bridge.

[0004] To achieve the above objectives, the first aspect of this utility model provides an anti-entanglement device for an upper axle of a bridge, comprising an upper axle of a bridge, a support frame, and a first anti-entanglement component; the upper axle of the bridge is rotatably mounted on a bridge housing and has at least two sprocket bodies spaced apart along its length; the support frame is mounted on the bridge housing and located inside the upper axle of the bridge; a first anti-entanglement component is provided between any two adjacent sprocket bodies, the first anti-entanglement component having a first anti-entanglement cover, the first anti-entanglement cover being disposed around the outside of the upper axle of the bridge, and the upper and lower ends of the first anti-entanglement cover extending one-to-one to the upper and lower sides of the support frame respectively, the upper and lower ends of the first anti-entanglement cover being detachably connected to the support frame.

[0005] In this embodiment of the utility model, the first anti-tangling component further includes a first support block located between the support frame and the upper shaft of the bridge, and a first support block is provided between any two adjacent sprocket bodies. The upper end of the first anti-tangling cover extends sequentially from the upper shaft of the bridge to the upper side of the first support block and the support frame, and the lower end of the first anti-tangling cover extends sequentially from the upper shaft of the bridge to the lower side of the first support block and the support frame. The upper and lower ends of the first anti-tangling cover are detachably connected to the support frame through a first connector, and the upper and lower ends of the first anti-tangling cover are detachably connected to the first support block through a second connector.

[0006] In this embodiment of the utility model, the support frame extends along a direction parallel to the upper axis of the bridge and connects the upright plates on both sides of the bridge housing. The upper and lower sides of the support block are respectively flush with the upper and lower sides of the support frame, so that the first anti-tangling cover is U-shaped.

[0007] In this embodiment of the invention, the first support block is made of nylon material.

[0008] In this embodiment of the invention, the number of first support blocks in each first anti-tangling cover is at least two, and at least two first support blocks are arranged sequentially at intervals along the length direction parallel to the upper axis of the bridge in the same first anti-tangling cover.

[0009] In this embodiment of the utility model, the first connector passes through the upper end of the first anti-tangling cover, the support frame and the lower end of the first anti-tangling cover from top to bottom, and the second connector passes through the upper end of the first anti-tangling cover, the support block and the lower end of the first anti-tangling cover from top to bottom.

[0010] In this embodiment of the utility model, the anti-tangling device for the upper shaft of the bridge further includes a second anti-tangling component disposed corresponding to the end of the upper shaft of the bridge. The second anti-tangling component has a second anti-tangling cover, which is disposed around the outside of the upper shaft of the bridge, and the upper and lower ends of the second anti-tangling cover extend to the upper and lower sides of the support frame respectively. The upper and lower ends of the second anti-tangling cover are detachably connected to the support frame.

[0011] In this embodiment of the utility model, the second anti-entanglement cover has an clearance gap on the side away from the sprocket body, and the anti-entanglement device for the upper shaft of the bridge also includes a bearing sleeve for the upper shaft of the bridge to pass through, the bearing sleeve extending from the bridge housing into the clearance gap.

[0012] In this embodiment of the utility model, a support bar is also provided on the support frame. The support bar is arranged directly opposite the sprocket body along the length direction of the bridge housing, so as to allow the chain wound on the sprocket body to abut against it.

[0013] In this embodiment of the utility model, a guide surface is formed at one end of the support bar near the sprocket body, and the guide surface extends downward at an inclination toward the sprocket body.

[0014] In this embodiment of the utility model, the support frame is also provided with an intermediate bearing seat, which is used for the upper shaft of the bridge to pass through, and the first anti-entanglement cover is provided with a contoured notch for the intermediate bearing seat to extend out.

[0015] In this embodiment of the invention, the first anti-entanglement cover and the sprocket body are spaced apart to form an anti-collision gap, which is between 1-3mm.

[0016] To achieve the above objectives, a second aspect of this utility model provides a harvester that includes the aforementioned anti-tangling device for the upper axle of the bridge.

[0017] Through the above technical solution, the anti-entanglement device for the upper axle of the bridge provided by this utility model embodiment has the following beneficial effects:

[0018] When using the above-mentioned anti-tangling device for the upper axle of the bridge, the upper axle of the bridge is rotatably mounted on the bridge housing and has at least two sprockets spaced apart along its length. The support frame is mounted on the bridge housing and located inside the upper axle of the bridge. The first anti-tangling component is located between two adjacent sprockets. The first anti-tangling cover of the first anti-tangling component is arranged around the outside of the upper axle of the bridge, and the upper and lower ends of the first anti-tangling cover extend to the upper and lower sides of the support frame respectively. The upper and lower ends of the first anti-tangling cover are detachably connected to the support frame. Thus, the first anti-tangling cover and the support frame form a barrier around the upper axle of the bridge, preventing crop stems from tangling onto the upper axle of the bridge. The first anti-tangling cover, the support frame, and the bridge housing are fixedly arranged, with strong impact resistance and stable connection. During use, the first anti-tangling cover can be easily disassembled and maintained, and the first anti-tangling cover can be prevented from falling off, making it suitable for long-term operation.

[0019] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0020] The accompanying drawings are provided to illustrate the present invention and form part of the specification. They are used together with the following detailed description to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0021] Figure 1 This is a structural diagram of an anti-entanglement device for an upper axle of a bridge according to an embodiment of the present invention;

[0022] Figure 2 yes Figure 1 A magnified view of a section at point A in the middle;

[0023] Figure 3 This is a cross-sectional view from the front view of an anti-entanglement device for the upper shaft of a bridge according to an embodiment of the present invention;

[0024] Figure 4 This is a cross-sectional view from the side of an anti-entanglement device for the upper axle of a bridge according to an embodiment of the present invention.

[0025] Explanation of reference numerals in the attached figures

[0026] 11. Upper axle of the bridge; 12. Bridge housing; 13. Sprocket body; 14. Bearing sleeve; 15. Intermediate bearing seat; 2. Support frame; 31. First anti-entanglement cover; 32. First connecting piece; 33. Support block; 34. Second connecting piece; 41. Second anti-entanglement cover; 42. Clearance gap; 5. Support bar. Detailed Implementation

[0027] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0028] The following description, with reference to the accompanying drawings, describes the anti-tangling device for the upper shaft of the bridge and the harvester of this utility model.

[0029] like Figure 1 As shown, the first aspect of this utility model provides an anti-entanglement device for the upper shaft of a bridge, wherein the anti-entanglement device for the upper shaft of a bridge includes:

[0030] The upper shaft 11 of the bridge is rotatably mounted on the bridge housing 12 and at least two sprocket bodies 13 are arranged at intervals along the length direction;

[0031] Support frame 2 is mounted on bridge housing 12 and located inside the upper shaft 11 of the bridge;

[0032] The first anti-entanglement component is provided between any two adjacent sprocket bodies 13. The first anti-entanglement component has a first anti-entanglement cover 31. The first anti-entanglement cover 31 is arranged around the outside of the upper shaft 11 of the bridge, and the upper and lower ends of the first anti-entanglement cover 31 extend to the upper and lower sides of the support frame 2 respectively. The upper and lower ends of the first anti-entanglement cover 31 are detachably connected to the support frame 2.

[0033] When using the aforementioned anti-tangling device for the upper axle of the bridge, the upper axle 11 is rotatably mounted on the bridge housing 12 and at least two sprocket bodies 13 are sequentially spaced along its length. The support frame 2 is disposed on the bridge housing 12 and located inside the upper axle 11. The first anti-tangling component is disposed between two adjacent sprocket bodies 13. The first anti-tangling cover 31 of the first anti-tangling component is disposed around the outside of the upper axle 11, and the upper and lower ends of the first anti-tangling cover 31 extend one-to-one towards the upper part of the support frame 2. On both sides below, the upper and lower ends of the first anti-tangling cover 31 are detachably connected to the support frame 2; thus, the first anti-tangling cover 31 and the support frame 2 form a barrier around the upper shaft 11 of the bridge, preventing crop stems from tangling onto the upper shaft 11 of the bridge. The first anti-tangling cover 31, the support frame 2 and the bridge shell 12 are fixedly installed, with strong impact resistance and stable connection. During use, the first anti-tangling cover 31 can be easily disassembled and repaired, and the first anti-tangling cover 31 can be prevented from falling off, making it suitable for long-term operation. In this embodiment of the present invention, the first anti-tangling component further includes a first support block 33 located between the support frame 2 and the upper shaft 11 of the bridge, and a first support block 33 is provided between any two adjacent sprocket bodies 13. The upper end of the first anti-tangling cover 31 extends from the upper shaft 11 of the bridge to the upper side of the first support block 33 and the support frame 2, and the lower end of the first anti-tangling cover 31 extends from the upper shaft 11 of the bridge to the lower side of the first support block 33 and the support frame 2. The upper and lower ends of the first anti-tangling cover 31 are detachably connected to the support frame 2 through the first connector 32, and the upper and lower ends of the first anti-tangling cover 31 are detachably connected to the first support block 33 through the second connector 34.

[0034] like Figure 4As shown in this embodiment of the present invention, the first anti-tangling component further includes a first support block 33 located between the support frame 2 and the upper shaft 11 of the bridge, and a first support block 33 is provided between any two adjacent sprocket bodies 13. The upper end of the first anti-tangling cover 31 extends from the upper shaft 11 of the bridge to the upper side of the first support block 33 and the support frame 2, and the lower end of the first anti-tangling cover 31 extends from the upper shaft 11 of the bridge to the lower side of the first support block 33 and the support frame 2. The upper and lower ends of the first anti-tangling cover 31 are detachably connected to the support frame 2 through the first connector 32, and the upper and lower ends of the first anti-tangling cover 31 are detachably connected to the first support block 33 through the second connector 34. The first support block 33 provides additional support for the first anti-entanglement cover 31, preventing it from deforming or loosening due to external impact. The first support block 33 is detachable; when disassembly and maintenance of the first anti-entanglement cover 31 are required, the second connector 34 and the first connector 32 can be removed sequentially. After the first support block 33 and the first anti-entanglement cover 31 lose the connection constraint of the second connector 34, they can move relative to each other, allowing the first anti-entanglement cover 31 to be pulled out horizontally. The first support block 33 will not interfere with the upper shaft 11 of the bridge. It is understandable that if the first support block 33 and the first anti-entanglement cover 31 were to use a non-detachable connection structure (e.g., welding), disassembling the first anti-entanglement cover 31 would require removing the entire upper shaft 11 of the bridge, severely impacting disassembly and assembly efficiency.

[0035] Of course, this utility model is not limited to this. A protruding structure can also be provided on the side of the support frame 2 facing the upper shaft 11 of the bridge to support the first anti-tangling cover 31.

[0036] It should be noted that by setting the first support block 33, the length of the first anti-tangling cover 31 can be further extended, thereby more effectively preventing tangling of longer crop roots and stems.

[0037] like Figure 4As shown in this embodiment of the invention, the support frame 2 extends parallel to the upper shaft 11 of the bridge and connects the upright plates on both sides of the bridge housing 12. The upper and lower sides of the support block 33 are flush with the upper and lower sides of the support frame 2, respectively. The upper end of the first anti-tangling cover 31 extends horizontally toward the support frame 2 and overlaps the upper sides of the first support block 33 and the support frame 2 in sequence. The lower end of the first anti-tangling cover 31 extends horizontally toward the support frame 2 and overlaps the lower sides of the first support block 33 and the support frame 2 in sequence, so that the first anti-tangling cover 31 is U-shaped. The U-shaped first anti-tangling cover 31 has a larger contact area with the support frame 2 and the support block 33, and can more effectively transmit the impact force it receives. Furthermore, a larger contact area makes it easier to install connectors. For example, a larger installation area can be provided for the first connector 32 on the support frame 2. By moving the first connector 32, it can be ensured that the first connector 32 can be aligned with the connecting structure on the first anti-tangling cover 31. Alternatively, a larger installation area can be provided on the first anti-tangling cover 31 to move the first connector 32, thereby aligning the first connector 32 with the connecting structure.

[0038] Specifically, the first connector 32 passes through the upper end of the first anti-tangling cover 31, the support frame 2 and the lower end of the first anti-tangling cover 31 from top to bottom, and the second connector 34 passes through the upper end of the first anti-tangling cover 31, the support block 33 and the lower end of the first anti-tangling cover 31 from top to bottom.

[0039] Furthermore, if both the first connector 32 and the second connector 34 are bolts, then the connection structure between the support frame 2 and the first anti-entanglement cover 31 is correspondingly set as a connection hole or a connection groove.

[0040] Specifically, the first support block 33 is made of nylon. Nylon has good wear resistance and self-lubricating properties, which can effectively reduce friction between the first anti-tangling cover 31 and the support block 33, extending the service life of the device. At the same time, nylon has a certain degree of elasticity, which can provide a buffering effect when subjected to force, reducing the impact of impact on the overall structure. In addition, the lightweight characteristics of nylon also help to reduce the weight of the entire device, making it easier to install and maintain.

[0041] Specifically, each first anti-entanglement cover 31 contains at least two first support blocks 33, and the at least two first support blocks 33 are arranged sequentially at intervals along the length direction parallel to the upper shaft 11 of the bridge within the same first anti-entanglement cover 31. By arranging multiple first support blocks 33 at intervals, the impact resistance of the first anti-entanglement cover 31 can be improved, while material costs and the weight of the device can be reduced.

[0042] Furthermore, the first anti-tangling cover 31 is provided with first support blocks 33 at both ends along the length direction of the upper shaft 11 of the bridge. The first support blocks 33 at both ends can play a blocking role to prevent materials from entering the first anti-tangling cover 31.

[0043] like Figure 1 and Figure 3 As shown in this embodiment of the invention, the anti-tangling device for the upper axle of the bridge further includes a second anti-tangling component disposed corresponding to the end of the upper axle 11. The second anti-tangling component has a second anti-tangling cover 41, which is disposed around the outside of the upper axle 11. The upper and lower ends of the second anti-tangling cover 41 extend to the upper and lower sides of the support frame 2 respectively, and the upper and lower ends of the second anti-tangling cover 41 are detachably connected to the support frame 2. The second anti-tangling cover 41 is used to prevent tangling at both ends of the upper axle 11. The distance between the sprocket body 13 and the upright plate is smaller than the distance between adjacent sprocket bodies 13, and the width of the second anti-tangling cover 41 is also smaller than the width of the first anti-tangling cover 31.

[0044] Specifically, the second anti-tangling component also includes a second support block 33, which abuts against the upper and lower ends of the second anti-tangling cover 41.

[0045] like Figure 2 As shown in this embodiment of the invention, the second anti-entanglement cover 41 has a clearance notch 42 formed on the side opposite to the sprocket body 13. The anti-entanglement device for the upper shaft of the bridge also includes a bearing sleeve 14 for the upper shaft 11 of the bridge to pass through. The bearing sleeve 14 extends from the bridge housing 12 into the clearance notch 42. The bearing sleeve 14 reduces the friction generated by the upper shaft 11 of the bridge during rotation and also plays a certain role in preventing entanglement. The clearance notch 42 is provided corresponding to the bearing sleeve 14 to avoid interference with the bearing sleeve 14. Furthermore, the corresponding plate of the second anti-entanglement cover 41 is still provided on the rear side of the clearance notch 42, thereby playing a role in preventing entanglement of longer roots and stems.

[0046] like Figure 1 and Figure 4 As shown in this embodiment of the invention, a support bar 5 is also provided on the support frame 2. The support bar 5 is positioned directly opposite the sprocket body 13 along the length of the bridge housing 12, so as to allow the chain wound around the sprocket body 13 to abut against it. The support bar 5 can prevent the chain from directly contacting the support frame 2 and causing wear to the support frame 2. Correspondingly, the support bar 5 can be made of wear-resistant material.

[0047] In this embodiment of the invention, a guide surface is formed at one end of the support bar 5 near the sprocket body 13, and the guide surface extends downward at an incline toward the sprocket body 13. The guide surface guides the chain and prevents the end face of the support bar 5 from catching on the chain, thus avoiding damage to the chain.

[0048] like Figure 1 As shown in this embodiment of the invention, the support frame 2 is further provided with an intermediate bearing seat 15, which is used for the upper shaft 11 of the bridge to pass through. The first anti-entanglement cover 31 has a contoured notch for the intermediate bearing seat 15 to extend out. The intermediate bearing seat 15 can effectively improve the stability of the upper shaft 11 of the bridge during operation, and the contoured notch design ensures that the gap between the first anti-entanglement cover 31 and the intermediate bearing seat 15 is small, preventing material from entering the first anti-entanglement cover 31 along the contoured notch.

[0049] In this embodiment of the invention, a collision-prevention gap is formed between the first anti-entanglement cover 31 and the sprocket body 13, with the gap being between 1 and 3 mm. The collision-prevention gap effectively reduces the risk of collision between the first anti-entanglement cover 31 and the sprocket body 13, and by precisely controlling the gap range, crop roots and stems can be prevented from getting entangled in the collision-prevention gap.

[0050] Specifically, the inner diameters of the first anti-tangling cover 31 and the second anti-tangling cover 41 are both larger than the boss of the sprocket body 13, so as to cover the boss.

[0051] To achieve the above objectives, a second aspect of this utility model provides a harvester that includes the aforementioned anti-tangling device for the upper axle of the bridge.

[0052] In the description of this utility model, it should be understood that 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. Therefore, 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, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0053] 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 mechanical connection, an electrical connection, or a connection that allows communication between them; 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.

[0054] 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.

[0055] 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. An anti-winding device for a bridge axle, characterized in that, The anti-entanglement device for the upper axle of the bridge includes: The upper shaft (11) of the bridge is rotatably mounted on the bridge housing (12) and at least two sprocket bodies (13) are arranged at intervals along the length direction. A support frame (2) is provided on the bridge housing (12) and located inside the upper shaft (11) of the bridge; The first anti-entanglement component is provided between any two adjacent sprocket bodies (13). The first anti-entanglement component has a first anti-entanglement cover (31). The first anti-entanglement cover (31) is arranged around the outside of the upper shaft (11) of the bridge, and the upper and lower ends of the first anti-entanglement cover (31) extend to the upper and lower sides of the support frame (2) respectively. The upper and lower ends of the first anti-entanglement cover (31) are detachably connected to the support frame (2).

2. The anti-winding device for a bridge shaft according to claim 1, characterized in that, The first anti-tangling component further includes a first support block (33) located between the support frame (2) and the upper shaft of the bridge (11), and the first support block (33) is provided between any two adjacent sprocket bodies (13). The upper end of the first anti-tangling cover (31) extends from the upper shaft of the bridge (11) to the upper side of the first support block (33) and the support frame (2), and the lower end of the first anti-tangling cover (31) extends from the upper shaft of the bridge (11) to the lower side of the first support block (33) and the support frame (2). The upper and lower ends of the first anti-tangling cover (31) are detachably connected to the support frame (2) through the first connector (32), and the upper and lower ends of the first anti-tangling cover (31) are detachably connected to the first support block (33) through the second connector (34).

3. The anti-winding device for a bridge shaft according to claim 2, characterized in that, The support frame (2) extends in a direction parallel to the upper shaft (11) of the bridge and connects the upright plates on both sides of the bridge housing (12). The upper and lower sides of the support block (33) are respectively flush with the upper and lower sides of the support frame (2) so that the first anti-tangling cover (31) is U-shaped.

4. The anti-winding device for a bridge shaft according to claim 2, characterized by The first support block (33) is made of nylon material; And / or, the number of the first support blocks (33) in each of the first anti-tangling covers (31) is at least two, and at least two of the first support blocks (33) are arranged sequentially at intervals along the length direction parallel to the upper axis (11) of the bridge within the same first anti-tangling cover (31); And / or, the first connector (32) passes through the upper end of the first anti-tangling cover (31), the support frame (2) and the lower end of the first anti-tangling cover (31) from top to bottom, and the second connector (34) passes through the upper end of the first anti-tangling cover (31), the support block (33) and the lower end of the first anti-tangling cover (31) from top to bottom.

5. The anti-winding device for a bridge shaft according to claim 1, wherein The anti-tangling device for the upper axle of the bridge also includes a second anti-tangling component disposed at the end of the upper axle of the bridge (11). The second anti-tangling component has a second anti-tangling cover (41). The second anti-tangling cover (41) is disposed around the outside of the upper axle of the bridge (11), and the upper and lower ends of the second anti-tangling cover (41) extend to the upper and lower sides of the support frame (2) respectively. The upper and lower ends of the second anti-tangling cover (41) are detachably connected to the support frame (2).

6. The anti-winding device for a bridge shaft according to claim 5, characterized in that, The second anti-entanglement cover (41) has a clearance notch (42) on the side away from the sprocket body (13). The anti-entanglement device for the upper shaft of the bridge also includes a bearing sleeve (14) for the upper shaft of the bridge (11) to pass through. The bearing sleeve (14) extends from the bridge housing (12) into the clearance notch (42).

7. The anti-entanglement device for the upper axle of a bridge according to any one of claims 1 to 6, characterized in that, The support frame (2) is also provided with a support bar (5), which is arranged along the length direction of the bridge housing (12) and facing the sprocket body (13) for the chain wound on the sprocket body (13) to abut against it.

8. The antiwrap device for a bridge shaft as set forth in claim 7, wherein The support bar (5) has a guide surface at one end near the sprocket body (13), and the guide surface extends downward at an angle toward the sprocket body (13).

9. The overbridge anti-entanglement device for shafts according to any one of claims 1 to 6, characterized in that, The support frame (2) is also provided with an intermediate bearing seat (15), which is used for the upper shaft (11) of the bridge to pass through. The first anti-entanglement cover (31) has a contoured notch for the intermediate bearing seat (15) to extend out. And / or, the first anti-entanglement cover (31) and the sprocket body (13) are spaced apart to form an anti-collision gap, the anti-collision gap being between 1-3mm.

10. A harvester characterized by The harvester includes an anti-tangling device for the upper axle of the bridge according to any one of claims 1 to 9.

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