Roller feeding anti-winding material guiding structure and harvester feeding roller mechanism

Abstract

The invention provides a roller feeding anti-winding material guiding structure and a harvester feeding roller mechanism, the roller feeding anti-winding material guiding structure comprises a material guiding crescent and an anti-winding ring, one end of the material guiding crescent is provided with a crescent hub, the crescent hub and the anti-winding ring are oppositely arranged in the axial direction, and the crescent hub and the anti-winding ring are oppositely arranged in the axial direction. A plurality of cut-off notches are formed in the side wall of the end, facing the anti-winding ring, of the crescent hub, and a grass discharging through groove is formed in the middle of the side wall of the crescent hub; the end, facing the crescent hub, of the anti-winding ring is provided with a protruding cutting edge, and the cutting edge extends into the crescent hub. By the adoption of the anti-winding device, the cut-off notch in the crescent hub can cut off materials wound on the anti-winding ring in time; through the cutting edges of the anti-winding rings, materials entering the crescent hubs can be cut and centrifugal force can be applied, so that the cut materials are discharged along the straw discharging through grooves; excessive grass winding at the inlet of the feeding roller is avoided, and the precision requirement of the material guide crescent is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of harvester feeding rollers, and in particular to a roller feeding anti-entanglement material guiding structure and a harvester feeding roller mechanism. Background Art

[0002] With the development of modern agriculture, mechanical harvesting has become the main way to harvest crops. However, with the diversification of agricultural planting structure, modern agricultural harvesting machinery not only needs to efficiently harvest common crops such as wheat, corn, and soybeans, but also needs to adapt to the harvesting needs of difficult-to-thresh crops such as rice, grains, and chickpeas. This makes the performance requirements of the key component of harvesting machinery - the roller feeding device increasingly higher.

[0003] In traditional feeding rollers, the guide crescent is located at the feeding end of the feeding roller, and its outer arc surface is used to guide the material to move along the outer circumference of the feeding roller. A circular anti-entanglement ring is sleeved on the barrel shaft between the guide crescent and the blades of the feeding roller to prevent the material from directly winding around the barrel shaft and entering the guide crescent. In the actual working process, it is very important to control the gap between the guide crescent and the roller feeding blades. When the gap is too large, too much grass is easily entangled on the circular anti-entanglement ring, causing material accumulation at the feeding entrance, causing blockage, blade damage, and even friction fire. When the gap is too small, the friction of the material at the gap increases sharply, which will not only aggravate the wear of the blades, but may also directly cause friction fire, posing a serious safety hazard.

[0004] In addition, since the gap between the drum feeding blade and the guide crescent is affected by the error of the parts and the assembly error, its accuracy is often difficult to guarantee. This inaccurate gap setting makes it difficult for harvesters to achieve ideal harvesting results when harvesting difficult-to-thresh crops and crops with strong straw toughness, thus limiting the scope of application of harvesters and restricting the efficiency and flexibility of agricultural production. Summary of the invention

[0005] The technical problem to be solved by the present invention is: how to reduce the accuracy requirement of the material guide crescent, while avoiding the problem of excessive grass entanglement at the entrance of the feeding roller causing blockage, blade damage and even friction fire.

[0006] The technical solution of the present invention to solve the above technical problems is as follows:

[0007] The present invention provides a roller feeding anti-winding material guiding structure, comprising a material guiding crescent and an anti-winding ring, wherein a crescent wheel hub is arranged at one end of the material guiding crescent, the crescent wheel hub and the anti-winding ring are arranged opposite to each other in the axial direction, a plurality of cutting notches are provided on the side wall of the end of the crescent wheel hub facing the anti-winding ring, a grass discharge groove is provided in the middle of the side wall of the crescent wheel hub; a raised cutting blade is provided at the end of the anti-winding ring facing the crescent wheel hub, and the cutting blade extends into the crescent wheel hub.

[0008] The beneficial effects of the present invention are:

[0009] By adopting the present invention, through the cutting notch on the crescent wheel hub, when the crescent wheel hub and the anti-winding ring move relative to each other, the material wound on the anti-winding ring can be cut off in time, thereby removing the grass entanglement; through the cutting blade of the anti-winding ring, the material entering the crescent wheel hub can be shredded and centrifugal force can be applied, so that the material is discharged along the grass discharge groove after being shredded; the problem of blockage, blade damage and even friction fire caused by excessive grass entanglement at the entrance of the feeding roller is avoided, and the accuracy requirement of the material guide crescent is reduced.

[0010] Based on the above technical solution, the present invention can also be improved as follows.

[0011] Furthermore, the cutting blade is arc-shaped and arranged around the axis of the anti-winding ring.

[0012] The resistance of the material to the cutting edge is reduced, which is convenient for reducing mechanical wear; at the same time, the cutting direction of the cutting edge is consistent with the extension direction, which is convenient for keeping the cutting edge sharp.

[0013] Furthermore, the cutting blades are provided with at least two and are distributed along a spiral shape.

[0014] Spiral distribution: One end of the cutting edge is located on the inner side of the previous cutting edge, and the other end is located on the outer side of the next cutting edge, and so on, they are connected to form a ring.

[0015] It is convenient to increase the radial cutting range, fully shred the material, and at the same time drive the material to rotate.

[0016] Furthermore, a boss protruding toward the anti-winding ring is provided in the middle of the crescent wheel hub, and an annular gap capable of accommodating the cutting blade is provided between the outer side of the boss and the inner wall of the crescent wheel hub; the grass removal groove is directly opposite to the boss.

[0017] Through the design of the boss, the annular gap inside the crescent wheel hub can be isolated from the shaft of the feed roller, avoiding grass entanglement on the shaft and enabling the cutting blade to chop the material better; the grass discharge slot faces the boss, improving the material discharge efficiency.

[0018] Furthermore, the grass removal groove extends along the circumference of the crescent wheel hub.

[0019] Improves the material discharge efficiency.

[0020] Furthermore, a side of the material guiding crescent facing the anti-winding ring is flush with an end of the crescent wheel hub facing the anti-winding ring.

[0021] It is convenient to move the material on the crescent wheel hub along the cutting notch to prevent grass from being entangled on the crescent wheel hub, and it is convenient to cut the material more efficiently and remove the grass.

[0022] Furthermore, a long groove for cutting off grass is provided on the side of the material guide crescent facing the anti-winding ring, one end of the long groove for cutting off grass extends into the crescent wheel hub, and the other end extends to the outer arc surface of the material guide crescent.

[0023] When longer grass enters the crescent wheel hub, the grass discharge groove is cut off to cut off the grass. The inner grass enters the crescent wheel hub and is chopped. The outer grass is discharged along the cut grass discharge groove and can continue to be guided by the outer arc surface of the guide crescent, thereby improving the feeding efficiency.

[0024] Furthermore, a rib plate is provided on the outer side wall of the crescent wheel hub, and the rib plate is connected to the inner arc side of the material guide crescent.

[0025] The strength of the material guide crescent is improved.

[0026] Furthermore, the anti-winding ring partially extends into the crescent wheel hub, and a guide baffle is provided on the anti-winding ring. The guide baffle extends along the circumferential spiral of the anti-winding ring, and the spiral direction of the guide baffle is opposite to the extension direction of the material guide crescent; one end of the anti-winding ring away from the crescent wheel hub is flush with the guide baffle.

[0027] During installation, the guide baffle can be arranged close to the feeding blades. Under the cooperation of the rotating guidance of the guide baffle and the static guidance of the material guide crescent, the material moves toward the outer peripheral side of the feeding drum to the area where the feeding blades are located, thereby improving the feeding efficiency. At the same time, the existence of the guide baffle can prevent the material wound on the anti-winding ring from spreading to the feeding blades. The guide baffle cooperates with the edge of the cutting notch, so that the cutting notch can cut the material more efficiently. The anti-winding ring partially extends into the crescent hub. The anti-winding ring cooperates with multiple cutting notches, which is convenient for cutting the wound material into multiple sections, making it easier to enter the crescent hub, so that it can be chopped and discharged faster, effectively avoiding the blockage caused by grass entanglement.

[0028] The present invention also provides a harvester feeding roller mechanism, including a feeding roller and a frame, wherein a roller shaft is provided at the inlet end of the feeding roller, and the roller shaft is connected to the frame through a bearing; the mechanism also includes the above-mentioned roller feeding anti-winding material guiding structure, wherein the crescent wheel hub and the anti-winding ring are both sleeved on the roller shaft, the anti-winding ring is located between the crescent wheel hub and the feeding roller, the roller shaft is transmission-connected to the anti-winding ring, and the crescent wheel hub is fixed to the frame.

[0029] This avoids the problem of excessive grass entanglement at the entrance of the feeding roller causing blockage, blade damage and even friction fire, and reduces the accuracy requirements of the material guide crescent. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the roller feeding anti-entanglement material guiding structure of the present invention.

[0031] Figure 2 This is a schematic diagram of the structure of the material guide crescent.

[0032] Figure 3 It is a schematic diagram of the structure of the anti-winding ring.

[0033] Figure 4 It is a structural schematic diagram of the feeding drum mechanism of the harvester of the present invention.

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

[0035] 1-material guide crescent; 2-anti-winding ring; 3-crescent wheel hub; 4-cutting notch; 5-grass discharge slot; 6-cutting blade; 7-boss; 8-rib plate; 9-cutting grass discharge slot; 10-guide baffle; 11-feeding roller; 12-drum shaft. DETAILED DESCRIPTION

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

[0037] The present invention refers to Figure 1-4 .

[0038] The present invention provides a roller feeding anti-winding material guiding structure, comprising a material guiding crescent 1 and an anti-winding ring 2, wherein a crescent wheel hub 3 is arranged at one end of the material guiding crescent 1, the crescent wheel hub 3 and the anti-winding ring 2 are arranged opposite to each other in the axial direction, a plurality of cutting notches 4 are provided on the side wall of the end of the crescent wheel hub 3 facing the anti-winding ring 2, and a grass discharge groove 5 is provided in the middle of the side wall of the crescent wheel hub 3; a raised cutting blade 6 is provided at the end of the anti-winding ring 2 facing the crescent wheel hub 3, and the cutting blade 6 extends into the crescent wheel hub 3.

[0039] principle:

[0040] During manufacturing, the guide crescent 1 and the anti-winding ring 2 are two independent parts. During installation, the guide crescent 1 is located at the feed end of the feeding roller 11 and is fixed to the frame of the feeding roller 11. The barrel shaft 12 of the feeding roller 11 passes through the middle of the anti-winding ring 2 and the crescent wheel hub 3 in sequence, and is connected to the frame through a bearing. The barrel shaft 12 is connected to the anti-winding ring 2 in a transmission manner, and the anti-winding ring 2 can be arranged in a manner that fits the feeding blades. The gap between the guide crescent 1 and the feeding blades can be slightly widened.

[0041] During operation, the feeding roller 11 and the anti-winding ring 2 rotate, and when the material enters, it is guided by the outer arc surface of the guide crescent 1 to move toward the outer periphery of the feeding roller 11, so that the feeding blades can pull the material. When grass is entangled in the gap between the guide crescent 1 and the feeding blades, the anti-winding ring 2 drives the material to rotate rapidly relative to the crescent hub 3, and the material is cut off when it contacts the cutting notch 4 of the crescent hub 3. Some of the material breaks away from the anti-winding ring 2 and continues to flow into the area where the feeding blades are located; a small amount of material enters the crescent hub 3, and the material entering the crescent hub 3 will be cut and crushed by the cutting blade 6 for many times. At the same time, the material is cut and centrifugal force is generated as the cutting blade 6 rotates. Under the action of the centrifugal force, the material is discharged along the grass discharge slot 5.

[0042] By adopting the present invention, through the cutting notch 4 on the crescent wheel hub 3, when the crescent wheel hub 3 and the anti-winding ring 2 move relative to each other, the material wound on the anti-winding ring 2 can be cut off in time, thereby removing the grass entanglement; through the cutting blade 6 of the anti-winding ring 2, the material entering the crescent wheel hub 3 can be shredded and centrifugal force can be applied, so that the material is shredded and discharged along the grass discharge groove 5; the problem of excessive grass entanglement at the entrance of the feeding roller 11 causing blockage, blade damage and even friction fire is avoided, and the accuracy requirement of the material guide crescent 1 is reduced.

[0043] Furthermore, the cutting blade 6 is arc-shaped and arranged around the axis of the anti-winding ring 2 .

[0044] The resistance of the material to the cutting blade 6 is reduced, which is convenient for reducing mechanical wear; at the same time, the cutting direction of the cutting blade 6 is consistent with the extension direction, which is convenient for keeping the cutting blade 6 sharp.

[0045] Furthermore, at least two cutting blades 6 are provided and distributed along a spiral shape.

[0046] Spiral distribution: one end of the cutting edge 6 is located inside the previous cutting edge 6, and the other end is located outside the next cutting edge 6, and the first ends are connected to form a ring.

[0047] It is convenient to increase the radial cutting range, fully shred the material, and at the same time drive the material to rotate.

[0048] Furthermore, a boss 7 protruding toward the anti-winding ring 2 is provided in the middle of the crescent wheel hub 3 , and an annular gap capable of accommodating the cutting blade 6 is provided between the outer side of the boss 7 and the inner wall of the crescent wheel hub 3 ; the grass discharge groove 5 is directly opposite to the boss 7 .

[0049] Through the design of the boss 7, the inner annular gap of the crescent wheel hub 3 can be isolated from the shaft 12 of the feeding roller 11, thereby preventing the shaft 12 from being entangled with grass and enabling the cutting blade 6 to better chop the material; the grass discharge groove 5 is opposite to the boss 7, thereby improving the material discharge efficiency.

[0050] Furthermore, the grass removal groove 5 extends along the circumferential direction of the crescent wheel hub 3 .

[0051] Improves the material discharge efficiency.

[0052] Furthermore, the side of the material guiding crescent 1 facing the anti-winding ring 2 is flush with the end of the crescent hub 3 facing the anti-winding ring 2 .

[0053] It is convenient to move the material on the crescent wheel hub 3 along the cutting notch 4 to prevent grass from being entangled on the crescent wheel hub 3, and it is convenient to cut the material more efficiently and remove the grass.

[0054] Furthermore, a long grass-cutting groove 9 is provided on the side of the material-guiding crescent 1 facing the anti-winding ring 2 , and one end of the long grass-cutting groove 9 extends into the crescent wheel hub 3 , and the other end extends to the outer arc surface of the material-guiding crescent 1 .

[0055] When longer grass enters the crescent wheel hub 3, the grass discharge groove 9 is cut off to cut off the grass. The internal grass enters the crescent wheel hub 3 and is chopped. The external grass is discharged along the cut grass discharge groove 9 and can continue to be guided by the outer arc surface of the guide crescent 1, thereby improving the feeding efficiency.

[0056] Furthermore, a rib plate 8 is provided on the outer wall of the crescent wheel hub 3 , and the rib plate 8 is connected to the inner arc side of the material guiding crescent 1 .

[0057] The strength of the material guide crescent 1 is improved.

[0058] Furthermore, the anti-winding ring 2 partially extends into the crescent wheel hub 3, and a guide baffle 10 is provided on the anti-winding ring 2. The guide baffle 10 extends along the circumferential spiral of the anti-winding ring 2, and the spiral direction of the guide baffle 10 is opposite to the extension direction of the material guide crescent 1; the end of the anti-winding ring 2 away from the crescent wheel hub 3 is flush with the guide baffle 10.

[0059] Note: The guide baffle 10 can be one or more pieces. When there is only one piece, its outer arc edge smoothly transitions with the anti-winding ring 2, and can also be regarded as the guide baffle 10 extending along the circumferential spiral of the anti-winding ring 2. According to this meaning, the guide crescent 1 can also be regarded as extending along the circumferential spiral of the crescent wheel hub 3, so the extension direction of the guide crescent 1 and the spiral direction of the guide crescent 1 are synonymous.

[0060] During installation, the guide baffle 10 can be arranged close to the feeding blades. Under the rotational guidance of the guide baffle 10 and the static guidance of the material guide crescent 1, the material moves toward the outer peripheral side of the feeding roller 11 to the area where the feeding blades are located, thereby improving the feeding efficiency. At the same time, the existence of the guide baffle 10 can prevent the material wound on the anti-winding ring 2 from spreading to the feeding blades. The guide baffle 10 cooperates with the edge of the cutting notch 4, so that the cutting notch 4 cuts off the material more efficiently. The anti-winding ring 2 partially extends into the crescent hub 3. The anti-winding ring 2 cooperates with multiple cutting notches 4, which is convenient for cutting the wound material into multiple sections, making it easier to enter the crescent hub 3, so that it can be chopped and discharged faster, effectively avoiding the blockage caused by grass entanglement.

[0061] The present invention also provides a harvester feeding roller mechanism, including a feeding roller 11 and a frame. The inlet end of the feeding roller 11 is provided with a barrel shaft 12, and the barrel shaft 12 is connected to the frame through a bearing; it also includes the above-mentioned roller feeding anti-winding material guiding structure, the crescent wheel hub 3 and the anti-winding ring 2 are both sleeved on the barrel shaft 12, the anti-winding ring 2 is located between the crescent wheel hub 3 and the feeding roller 11, the barrel shaft 12 is transmission-connected to the anti-winding ring 2, and the crescent wheel hub 3 is fixed to the frame.

[0062] Note: The frame is the prior art of the harvester feeding roller mechanism, not shown in the figure.

[0063] The problem of excessive grass entanglement at the entrance of the feeding roller 11 causing blockage, blade damage and even friction fire is avoided, and the accuracy requirement of the material guide crescent 1 is reduced.

[0064] In the description of the present invention, it should be understood that if there are descriptive terms indicating orientation, direction or positional relationship, such as “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., the orientation or positional relationship indicated in this specification is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of understanding the present invention and simplifying the description, and does not indicate or imply that the referred part, element or whole must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0065] In addition, if there are order description terms, such as "first", "second", etc., their purpose in this specification is to facilitate understanding or simplify description. For example, in order to distinguish multiple technical features of the same type or function, but they have to be mentioned separately, this specification may use prefix or suffix order description terms to distinguish them. Therefore, it cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0066] In the present invention, if the terms describing the relative functional relationship of structures are used, such as "install", "connect", "connect", "fix", etc., they should be understood in a broad sense unless otherwise clearly specified and limited. For example, "install", "connect", "connect", etc. can be a fixed connection, a detachable connection, or an integrated one; can be a mechanical connection or an electrical connection; can be a direct connection or an indirect connection through an intermediate medium, can be the internal connection of two elements or the interaction relationship between two elements; "fix" can be an integrated fixation or a detachable fixation through fasteners; can be a direct fixation or a fixation through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above-mentioned descriptive terms in the present invention can be understood according to the specific circumstances, the context, the coherence of the context, etc.

[0067] In the present invention, if there are descriptive terms with subsidiary or connecting meanings, for example, a first feature is "on" or "below" a second feature, unless otherwise clearly specified and limited, it should not be interpreted in a restrictive manner. For example, "on" or "below" can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above descriptive terms in the present invention can be understood according to the specific circumstances, the context, the coherence of the context, etc.

[0068] Furthermore, the first feature being “above”, “above”, and “above” the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being “below”, “below”, and “below” the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0069] 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 present invention. In this specification, the schematic representation of the above terms does 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, examples and features of the different embodiments and examples described in this specification without contradiction, and these combinations or combinations shall all fall within the scope summarized by the present invention.

[0070] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments made by a person skilled in the art within the scope of information available from public channels and in combination with the technical inspiration provided by the present application documents are still within the scope of protection of the present application.

Claims

1. A roller feeding anti-entanglement material guiding structure, characterized in that: The invention comprises a material guide crescent (1) and an anti-winding ring (2), wherein a crescent wheel hub (3) is arranged at one end of the material guide crescent (1), the crescent wheel hub (3) and the anti-winding ring (2) are arranged opposite to each other in the axial direction, a plurality of cutting notches (4) are provided on the side wall of the end of the crescent wheel hub (3) facing the anti-winding ring (2), and a grass discharge groove (5) is provided in the middle of the side wall of the crescent wheel hub (3); a protruding cutting blade (6) is provided at the end of the anti-winding ring (2) facing the crescent wheel hub (3), and the cutting blade (6) extends into the crescent wheel hub (3).

2. The roller feeding anti-entanglement material guiding structure according to claim 1 is characterized in that: The cutting blade (6) is arc-shaped and is arranged around the axis of the anti-winding ring (2).

3. The roller feeding anti-entanglement material guiding structure according to claim 2 is characterized in that: The cutting blades (6) are provided with at least two and are distributed along a spiral shape.

4. The roller feeding anti-entanglement material guiding structure according to claim 2 or 3, characterized in that: The middle part of the crescent wheel hub (3) is also provided with a boss (7) protruding toward the anti-winding ring (2), and an annular gap capable of accommodating the cutting blade (6) is provided between the outer side of the boss (7) and the inner wall of the crescent wheel hub (3); the grass removal groove (5) is directly opposite to the boss (7).

5. The roller feeding anti-entanglement material guiding structure according to claim 1 is characterized in that: The grass removal groove (5) extends along the circumference of the crescent wheel hub (3).

6. The roller feeding anti-entanglement material guiding structure according to claim 1 is characterized in that: The side of the material guiding crescent (1) facing the anti-winding ring (2) is flush with the end of the crescent wheel hub (3) facing the anti-winding ring (2).

7. The roller feeding anti-entanglement material guiding structure according to claim 6 is characterized in that: The material guide crescent (1) is also provided with a grass cutting and removing long groove (9) on the side facing the anti-winding ring (2), one end of the grass cutting and removing long groove (9) extends into the crescent wheel hub (3), and the other end extends to the outer arc surface of the material guide crescent (1).

8. The roller feeding anti-entanglement material guiding structure according to claim 7 is characterized in that: A rib plate (8) is provided on the outer side wall of the crescent wheel hub (3), and the rib plate (8) is connected to the inner arc side of the material guiding crescent (1).

9. The roller feeding anti-entanglement material guiding structure according to claim 6, characterized in that: The anti-winding ring (2) partially extends into the crescent wheel hub (3); a guide baffle (10) is provided on the anti-winding ring (2); the guide baffle (10) extends in a circumferential spiral along the anti-winding ring (2); the spiral direction of the guide baffle (10) is opposite to the extension direction of the material guiding crescent (1); and one end of the anti-winding ring (2) away from the crescent wheel hub (3) is flush with the guide baffle (10).

10. A feeding drum mechanism for a harvester, characterized in that: The invention comprises a feeding roller (11) and a frame, wherein a shaft (12) is provided at the inlet end of the feeding roller (11), and the shaft (12) is connected to the frame via a bearing; the invention also comprises the roller feeding anti-winding material guiding structure as described in any one of claims 1 to 9, wherein the crescent wheel hub (3) and the anti-winding ring (2) are both sleeved on the shaft (12), the anti-winding ring (2) is located between the crescent wheel hub (3) and the feeding roller (11), the shaft (12) and the anti-winding ring (2) are transmission-connected, and the crescent wheel hub (3) is fixed to the frame.

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