Dustpan

Abstract

The utility model discloses a dustpan. The dustpan comprises a dustpan rod; a cleaning part is arranged on the upper edge of the dustpan hopper, and the lower end of the dustpan rod is connected to the dustpan hopper; the comb tooth piece is movably arranged on the dustpan hopper and can rotate relative to the dustpan hopper, so that the comb tooth piece can retract into the cleaning part or penetrate out of the cleaning part; when the comb tooth piece is driven to rotate relative to the dustpan hopper and then retract into the cleaning part, the cleaning part cleans sundries on the comb tooth piece. According to the scheme of the dustpan, sundries on the comb tooth piece are cleaned in a mode that the comb tooth piece rotates, and therefore the dustpan is simpler to produce, manufacture, use and maintain.

Description

Technical Field

[0001] This application belongs to the technical field of household appliances, and in particular relates to a winnowing basket. Background Technology

[0002] In daily life and work, a dustpan is a cleaning tool used in conjunction with a broom to collect trash. During cleaning, trash and other debris are typically swept into the dustpan's container using a broom, and then transferred to a trash can. Because brooms usually have dense bristles at the bottom, they easily trap hair, debris, and other impurities. Current designs often incorporate comb-like teeth along the upper edge of the dustpan's opening; sweeping the broom bristles over these teeth supposedly removes the debris. However, this fixed-teeth design tends to transfer bristles to the teeth themselves, failing to actually solve the problem of debris sticking.

[0003] To address this, existing technology provides a solution where a mesh-like cleaning block is placed along the upper edge of the sieve, and then the comb teeth pass through the cleaning block. When the comb teeth and the cleaning block are relatively displaced, the debris adhering to the comb teeth can be removed. However, this cleaning method in the existing design requires a track above the sieve for the cleaning block or comb teeth to move horizontally. Therefore, its driving and movement-related structures are relatively complex, inconvenient to assemble, and prone to damage, resulting in high production and usage costs. Utility Model Content

[0004] This application aims to at least partially solve the problem that the comb-tooth cleaning structure on existing winnowing baskets is too complex, resulting in high production and usage costs. To this end, this application provides a winnowing basket, comprising:

[0005] winnowing basket handle;

[0006] A winnowing basket with a cleaning section along its upper edge, and the lower end of the winnowing basket rod is connected to the winnowing basket;

[0007] The comb teeth are movably mounted on the scoop and can rotate relative to the scoop, thereby allowing the comb teeth to retract into the cleaning section or protrude from the cleaning section.

[0008] When the comb teeth are driven to rotate relative to the hopper and retract into the cleaning section, the cleaning section cleans the debris on the comb teeth.

[0009] In some embodiments, the lower end of the winnowing basket is movably connected to the winnowing basket and can move vertically relative to the winnowing basket. A driving structure is provided between the winnowing basket and the comb teeth, so that when the winnowing basket moves downward in the vertical direction relative to the winnowing basket, the driving structure drives the comb teeth to rotate and retract into the cleaning section.

[0010] In some embodiments, the drive structure includes a vertical rack disposed at the lower end of the winnowing basket rod and a back rack disposed behind the comb teeth. The vertical rack meshes with the back rack. When the winnowing basket rod moves vertically downward relative to the winnowing basket, the vertical rack drives the comb teeth to rotate via the back rack, thereby retracting into the cleaning section; or

[0011] The driving structure includes a sliding pin disposed at the lower end of the winnowing basket rod and a sliding groove disposed behind the comb teeth. The sliding pin is slidably disposed in the sliding groove. When the winnowing basket rod moves vertically downward relative to the winnowing basket, the sliding pin generates a horizontal displacement within the sliding groove, and drives the comb teeth to rotate by abutting against the groove wall, thereby retracting into the cleaning section; or

[0012] The drive structure includes a traction rope, with its two ends connected to the lower end of the winnowing basket rod and the rear of the comb tooth component, respectively. When the winnowing basket rod moves vertically downward relative to the winnowing basket, the traction rope drives the comb tooth component to rotate, thereby retracting it into the cleaning section.

[0013] In some embodiments, when the drive structure includes a vertical rack disposed at the lower end of the scoop rod and a back rack disposed behind the comb, the back rack is distributed on a circumference centered on the rotation center of the comb and the scoop when the vertical rack meshes with the back rack.

[0014] In some embodiments, the comb tooth includes a plurality of teeth arranged side by side in front, and the cleaning part includes a plurality of cleaning grooves arranged side by side. When the comb tooth is driven to rotate relative to the scoop, the teeth retract or protrude from the cleaning grooves.

[0015] In some embodiments, the scoop has shaft holes or rotating shafts on both sides, and the comb has rotating shafts or shaft holes on both sides; the scoop and the comb are rotatably connected through the shaft holes and rotating shafts; and / or

[0016] An arc-shaped guide portion is provided behind the hopper, and an arc-shaped guide surface is provided behind the comb teeth. The contact surfaces of the arc-shaped guide portion and the arc-shaped guide surface are located on the same circumference. The arc-shaped guide surface is slidably disposed along the arc-shaped guide portion, thereby causing the comb teeth to rotate relative to the hopper.

[0017] In some embodiments, a reset member is also included, which drives the comb teeth to pass through the cleaning section.

[0018] In some embodiments, when the scoop and the comb teeth are rotatably connected to the rotating shaft via a shaft hole, the reset member includes a torsion spring disposed between the comb teeth and the scoop, the torsion spring passing through the rotating shaft and having its two ends abutting against the comb teeth and the scoop respectively; and / or

[0019] When the lower end of the winnowing basket is movably connected to the winnowing basket and can move vertically relative to the winnowing basket, and a driving structure is provided between the winnowing basket and the comb teeth, the reset member is a spring provided between the winnowing basket and the winnowing basket. The upper and lower ends of the spring abut against the lower end of the winnowing basket and the winnowing basket, respectively. The spring drives the winnowing basket to move upward in the vertical direction, and then drives the comb teeth to pass through the cleaning part through the driving structure.

[0020] In some embodiments, when the lower end of the winnowing basket is movably connected to the winnowing basket, a guide structure is provided between the winnowing basket and the winnowing basket, and the guide structure guides the winnowing basket to move vertically relative to the winnowing basket.

[0021] In some embodiments, the guiding structure includes a first guiding structure formed by a guide groove or guide block disposed on the hopper and a guide block or guide groove disposed at the lower end of the hopper rod, wherein the guide block slides within the guide groove when the hopper rod moves vertically relative to the hopper; and / or

[0022] The guide structure includes a second guide structure formed by a guide hole above the scoop and the rod of the scoop rod, the rod passing through the guide hole, and the rod sliding within the guide hole when the scoop rod moves vertically relative to the scoop. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 A schematic diagram of the winnowing basket disclosed in the embodiments of this application is shown;

[0025] Figure 2 A side sectional view of the winnowing basket disclosed in the first embodiment of this application is shown;

[0026] Figure 3 It shows Figure 2 A magnified view of part A in the middle;

[0027] Figure 4 An exploded view of the winnowing basket disclosed in the first embodiment of this application is shown;

[0028] Figure 5 A side sectional view of the winnowing basket disclosed in the second embodiment of this application is shown;

[0029] Figure 6 It shows Figure 5 A magnified view of part B in the middle section.

[0030] Figure label:

[0031] 1. Scrap rod; 11. Vertical rack; 12. Sliding pin; 13. Guide block;

[0032] 2. Siphon hopper; 21. Cleaning section; 22. Cleaning tank; 23. Shaft hole; 24. Arc-shaped guide section; 25. Guide groove; 26. Guide hole;

[0033] 3. Comb teeth; 31. Back rack; 32. Sliding groove; 33. Toothed part; 34. Rotating shaft; 35. Arc-shaped guide surface

[0034] 4. Reset component. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] It should be noted that all directional indications in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0037] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean 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.

[0038] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0039] This application is described below with reference to the accompanying drawings and specific embodiments:

[0040] This application discloses a winnowing basket with an innovative mechanical linkage structure that enables efficient cleaning of debris by the comb teeth, solving the problems of debris easily sticking to the comb teeth and the complex cleaning structure in existing winnowing basket designs. Figure 1 , 2As shown, the winnowing basket consists of a winnowing basket handle 1, a winnowing basket 2, and a comb-tooth component 3. The winnowing basket handle 1 serves as an operating handle, with its lower end connected to the winnowing basket 2, facilitating the movement of the winnowing basket 2 to different angles or positions, thereby making it convenient to receive and dispose of garbage. The dustpan 2 is an open container with a cleaning section 21 along its upper edge. The comb teeth 3 are rotatably mounted on the dustpan 2, and this rotation can be achieved through a hinge or an arc-shaped track. The structure of the cleaning section 21 is adapted to the structure and movement trajectory of the comb teeth 3, allowing the comb teeth 3 to extend out of the cleaning section 21 during rotation, or to retract the portion extending out of the cleaning section 21. When the comb teeth 3 retracts into the cleaning section 21, the cleaning section 21 blocks any debris adhering to the comb teeth 3, thus cleaning them. Since the cleaning section 21 is located along the upper edge of the dustpan 2, the debris cleaned by the cleaning section 21 falls directly into the dustpan 2, facilitating waste collection. When the comb teeth 3 extend out of the cleaning section 21, the exposed portion can clean debris adhering to the broom. The comb teeth 3 can switch between these two positions during rotation relative to the dustpan 2. The comb tooth 3 and the scoop 2 are configured to rotate relative to each other. Firstly, the driving method is simple; the comb tooth 3 can be driven directly from behind it. For example, a pedal fixed to the comb tooth 3 can be installed behind the scoop 2, allowing the comb tooth 3 to rotate by simply stepping on the pedal, and its front can retract from the outside of the cleaning section 21. Alternatively, the comb tooth 3 can be driven by the scoop rod 1 driving the drive structure. Secondly, since the comb tooth 3 rotates relative to the scoop 2, it only requires a hinged connection between the comb tooth 3 and the scoop 2, or a connection on the scoop 2. Setting up an arc-shaped track is sufficient. Compared to the existing design where the comb tooth 3 moves relative to the scoop 2, this design eliminates the need for a track on the scoop 2 for the comb tooth 3 to move, or the requirements for the track are lower. For example, when an arc-shaped track is set up on the scoop 2, the contact pressure between the comb tooth 3 and the track surface is smaller when the comb tooth 3 switches to a state exposed to the cleaning section 21, resulting in less track wear and lower product operating costs. Furthermore, during assembly, since the track is not involved or the requirements for the track are reduced, the assembly complexity of the comb tooth 3 and the scoop 2 is reduced, thereby lowering production costs.

[0041] In one embodiment of this utility model, such as Figure 2-5As shown, the lower end of the winnowing basket 1 is movably connected to the winnowing basket 2, allowing them to slide relative to each other in the vertical direction. A driving structure is provided between the winnowing basket 1 and the comb teeth 3. The winnowing basket 1 can drive the rotation of the comb teeth 3 during the sliding process of the winnowing basket 1 relative to the winnowing basket 2 through the driving structure. When in use, only pressing or pulling the winnowing basket 1 is needed to rotate the comb teeth 3, thereby completing the cleaning of the comb teeth 3, which provides a good effect on the convenience of use for users.

[0042] Specifically, in one embodiment of this utility model, such as Figure 2 , 3 As shown, the drive structure uses a rack and pinion transmission. A vertical rack 11 is located at the lower end of the scoop rod 1, and a back rack 31, meshing with the vertical rack 11, is located behind the comb tooth 3. When the scoop rod 1 moves downwards, the vertical rack 11 meshes with the back rack 31, converting linear motion into rotational motion and driving the comb tooth 3 to retract towards the cleaning section. This achieves a precise drive control method. It should be noted that the vertical rack 11 is generally distributed vertically and facing the comb tooth 3, while the back rack 31 is located on the side of the comb tooth 3 closer to the inside of the scoop 2. By adjusting the length of the back rack 31 or the length of a single tooth, the scoop rod 1 can maintain engagement with the vertical rack 11 throughout its downward movement, thus achieving precise drive of the comb tooth 3's rotation.

[0043] Furthermore, in order to better adapt to the rotation of the comb teeth 3, such as Figure 2 , 3 As shown, the back rack 31 is arc-shaped, with its center of curvature coinciding with the rotation center of the comb teeth. This allows for better adaptation to the rotation of the comb teeth 3. The arc-shaped design of the back rack 31 ensures that the meshing point is always located on the circumference of the rotation center during transmission. This avoids the meshing failure caused by angle changes during use, which is common with other back rack 31 designs. This improves transmission stability and reliability, reduces manufacturing difficulty, and thus lowers costs.

[0044] In another embodiment of this utility model, such as Figure 5 , 6As shown, the driving structure employs a sliding pin 12 engaging with a sliding groove 32. In some embodiments of this invention, the ultimate function of the driving structure is to convert the vertical movement of the winnowing pole 1 into the rotation of the comb teeth 3. Therefore, a sliding pin 12 is provided at the lower end of the winnowing pole 1, passing through the sliding groove 32 behind the comb teeth 3. Since the comb teeth 3 rotates, the sliding pin 12 needs to have space to move horizontally within the sliding groove 32; that is, the sliding groove 32 has a certain length extending horizontally. This allows the sliding pin 12 to move within the sliding groove 32 when the winnowing pole 1 drives the comb teeth 3 to rotate through the engagement of the sliding pin 12 and the sliding groove 32. When the winnowing pole 1 moves downwards, the sliding pin 12 abuts against the lower wall of the sliding groove 32, thereby driving the comb teeth 3.

[0045] Obviously, the function of the drive structure is to drive the comb teeth 3 to rotate when the winnowing pole 1 moves vertically. Therefore, the drive structure needs to both link the winnowing pole 1 and the comb teeth 3, and also generate a certain displacement or deformation within itself, such as the aforementioned rack and pinion meshing or sliding mechanism. That is, relative displacement is generated within the drive structure to create a change in the distance between the movement of the winnowing pole 1 and the rotation of the comb teeth 3. To this end, in another embodiment of this utility model, the drive structure is simplified to a traction rope. The two ends of the traction rope are respectively attached to the lower end of the winnowing pole 1 and the rear of the comb teeth 3. The traction rope has a certain length, that is, the traction rope needs to satisfy the requirement that when the winnowing pole 1 moves downward, it can drive the comb teeth 3 to rotate until it retracts into the cleaning part 21. When the winnowing pole 1 moves upward, the traction rope is not in a taut state in the initial stage. That is, in this stage, the upward movement of the winnowing pole 1 cannot drive the rotation of the comb teeth 3, or the rotation of the comb teeth 3 cannot drive the upward movement of the winnowing pole 1, until the traction rope is taut again. The advantage of this setup is that it utilizes the flexible transmission characteristics to reduce mechanical friction, making it suitable for scenarios with high requirements for noise and smooth operation. It also has a simple structure and is easy to assemble and maintain. However, it may cause instability in the connection between the scoop rod 1 and the comb tooth 3, resulting in inconvenience in product use.

[0046] In one embodiment of this utility model, such as Figure 4 As shown, the front of the comb 3 has multiple toothed sections 33 arranged side-by-side for scraping away debris from the broom. The cleaning section 21 has several cleaning grooves 22 corresponding to the toothed sections 33. The groove width is slightly larger than the thickness of the toothed section, and the height of the groove is greater than the height of the toothed section 33. When the comb 3 rotates towards the cleaning section 21, the toothed sections 33 retract from the cleaning grooves 22. The gaps between adjacent cleaning grooves 22 prevent debris from tangling or sticking to the toothed sections 33, thus using the mechanical scraping principle to peel off tangled hair, fibers, and other debris. This one-to-one correspondence design ensures that each toothed section is thoroughly cleaned during the retraction process, avoiding debris residue. Compared with traditional manual cleaning methods, the efficiency is significantly improved.

[0047] Furthermore, such as Figure 4 As shown, the scoop 2 and the comb tooth 3 are rotatably connected to the rotating shaft 34 via the shaft hole 23. Both ends of the rotating shaft 34 are fixed to the side walls of the scoop 2. The comb tooth 3 is fitted onto the rotating shaft 34 through the shaft hole 23, forming a rotatable fulcrum. To enhance rotational stability, an arc-shaped guide portion 24 is provided at the rear of the scoop, and a corresponding arc-shaped guide surface 35 is provided on the comb tooth. Both have the same radius of curvature, and their centers coincide with the center of the rotating shaft. When the comb tooth 3 rotates, the arc-shaped guide surface 35 slides along the arc-shaped guide portion 24, providing radial support force to counteract lateral forces during rotation, preventing the comb tooth 3 from tilting, ensuring that the cleaning part 21 and the toothed part 33 remain aligned, and improving cleaning accuracy. Obviously, the fit between the shaft hole 23 and the rotating shaft 34, and the fit between the arc-shaped guide part 24 and the arc-shaped guide surface 35, are both to ensure the rotation trajectory of the comb tooth 3 and the hopper 2. Therefore, the two methods can be used at the same time to ensure their accuracy, or one method can be selected according to actual needs to reduce production and usage costs.

[0048] In some embodiments of this utility model, in order to ensure that the comb teeth 3 can remain in a relatively stable position relative to the winnowing basket 2 during normal use of the winnowing basket for collecting debris, such as... Figure 3 , 4 As shown in Figures 6 and 7, the winnowing basket of this utility model is also provided with a reset member 4. The reset member 4 is used to drive the comb tooth 3 to pass through the cleaning part 21. That is, the function of the reset member 4 is to drive the comb tooth to return to the initial state after the pressing operation.

[0049] Specifically, this utility model provides the following two implementation methods for the reset component 4: One method is a torsion spring that cooperates with the rotating shaft 34, sleeved on the rotating shaft 34, with its two ends abutting against the comb tooth component 3 and the scoop 2 respectively. When the comb tooth component 3 is driven to rotate and retract into the cleaning section 21, the torsion spring deforms and stores potential energy. When the drive on the comb tooth component 3 is canceled, the torsion spring's potential energy is released, pushing the comb tooth component 3 back to its state of extending out of the cleaning section 21. The other method is a compression spring located between the scoop rod 1 and the scoop 2 when the comb tooth component 3 is driven to rotate by the scoop rod 1. When the scoop rod 1 is pressed, the spring is compressed; when the scoop rod 1 is released, the elastic force pushes the scoop rod 1 upward, and then the comb tooth component 3 is reset through the drive structure. Both reset methods are designed with mechanical balance to ensure that the reset force matches the driving resistance, achieving a smooth reset without jamming. In the torsion spring reset mechanism, the fixing structures at both ends of the torsion spring use bosses that engage with hooks at the ends of the torsion spring. The bosses are positioned at corresponding positions on the comb teeth 3 and the hopper 2 to ensure that the force on both ends of the torsion spring is uniform after installation. During rotation, the axis of the torsion spring is coaxial with the axis of the rotating shaft 34, avoiding reset failure caused by uneven load. In the spring reset mechanism, the free length of the compression spring is set according to the maximum stroke of the hopper rod 1, usually more than 1.5 times the pressing stroke, to ensure that the spring is always in a compressed state during reset, providing continuous reset force. The two ends of the spring abut against the lower end of the hopper rod 1 and the bottom of the hopper 2, respectively. At the same time, fixing structures for the spring can be set at the lower end of the hopper rod 1 and the bottom of the hopper 2 to prevent the spring from tipping over when compressed. When the hopper rod 1 moves down, the spring compression is proportional to the pressing stroke. After release, the spring force is transmitted to the drive structure through the hopper rod 1, causing the comb teeth to rotate in the opposite direction, achieving synchronization of the reset action.

[0050] In some embodiments of this utility model, such as Figure 3As shown, to ensure the stability of the vertical movement of the winnowing basket 1, a guide structure is provided to guide the winnowing basket 1. This utility model provides two guide structures. The first guide structure consists of a guide groove 25 and a guide block 13. The guide groove 25 extends vertically along the inner wall of the winnowing basket 2, and the guide block 13 is fixed to the lower end of the winnowing basket 1 and conforms to the shape of the guide groove 25. The two are in a clearance fit, which can both restrict the lateral movement of the winnowing basket 1 and guide its movement. The second guide structure consists of a guide hole 26 above the winnowing basket 2 and the body of the winnowing basket 1. The inner diameter of the guide hole 26 is slightly larger than the outer diameter of the body of the winnowing basket 1, forming a sliding fit, further constraining the deflection of the winnowing basket 1. The two guide structures work together to prevent lateral displacement of the winnowing basket 1 during movement, thereby ensuring the transmission accuracy of the drive structure. Strictly speaking, regardless of whether it is the first or the second guide structure, as long as the vertical contact length between the guide groove 25 and the guide block 13 or the guide hole 26 and the body of the dustpan 1 is relatively long, only one of the two guide structures needs to be used to complete the vertical guidance and lateral limitation of the dustpan 1. However, for household cleaning tools, the body of the dustpan is generally quite long, that is, the length of the dustpan 1 is much larger than the overall size of the dustpan 2. Therefore, the possibility of the dustpan 1 deflecting will increase. Therefore, the optimal solution is to use the first and the second guide structures at the same time, so as to ensure that the uppermost and lowermost ends of the contact point between the dustpan 1 and the dustpan 2 are limited and guided by the guide structure, thereby ensuring the smoothness of the movement of the dustpan 1 and the dustpan 2 within the maximum range.

[0051] This utility model provides various driving, resetting, and guiding structures, allowing for combinations or individual use as needed. Furthermore, parameters such as the groove spacing of the cleaning groove 22 and the height of the toothed portion 33 in the cleaning unit 21 can be adjusted according to the type of target debris, enabling targeted cleaning of different debris types in different environments.

[0052] Compared to traditional dustpans, the core innovation of this invention lies in transforming the user's pressing or stepping action into a mechanical linkage for self-cleaning comb teeth. This integration of functions through the precise coordination of multiple components avoids the tediousness and unhygienic nature of manual cleaning. Multiple implementation schemes for the drive structure cover different needs, from low cost to high reliability, while the guiding and resetting mechanisms ensure operational stability and continuity. This design not only improves cleaning efficiency, especially addressing the common problem of difficult hair removal in home cleaning environments, but also employs a simpler design approach compared to existing technologies, reducing manufacturing and maintenance costs.

[0053] 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. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

Claims

1. A winnowing basket, characterized in that, include: Winnowing basket handle (1); A winnowing basket (2) has a cleaning section (21) on its upper edge, and the lower end of the winnowing basket rod (1) is connected to the winnowing basket (2); The comb tooth (3) is movably mounted on the sieve (2) and can rotate relative to the sieve (2), thereby allowing the comb tooth (3) to retract into the cleaning section (21) or protrude from the cleaning section (21); When the comb tooth (3) is driven to rotate relative to the scoop (2) and then retracts into the cleaning section (21), the cleaning section (21) cleans the debris on the comb tooth (3).

2. A winnowing basket according to claim 1, characterized in that, The lower end of the winnowing basket rod (1) is movably connected to the winnowing basket (2) and can move vertically relative to the winnowing basket (2). A driving structure is provided between the winnowing basket rod (1) and the comb tooth (3), so that when the winnowing basket rod (1) moves downward in the vertical direction relative to the winnowing basket (2), the driving structure drives the comb tooth (3) to rotate and then retract into the cleaning part (21).

3. A winnowing basket according to claim 2, characterized in that, The driving structure includes a vertical rack (11) disposed at the lower end of the winnowing basket (1) and a back rack (31) disposed behind the comb (3). The vertical rack (11) meshes with the back rack (31). When the winnowing basket (1) moves vertically downward relative to the winnowing basket (2), the vertical rack (11) drives the comb (3) to rotate through the back rack (31), thereby retracting into the cleaning section (21); or The driving structure includes a sliding pin (12) disposed at the lower end of the winnowing basket (1) and a sliding groove (32) disposed behind the comb teeth (3). The sliding pin (12) is slidably disposed in the sliding groove (32). When the winnowing basket (1) moves vertically downward relative to the winnowing basket (2), the sliding pin (12) generates a horizontal displacement in the sliding groove (32) and drives the comb teeth (3) to rotate by abutting against the groove wall of the sliding groove (32), thereby retracting into the cleaning part (21); or The drive structure includes a traction rope, the two ends of which are connected to the lower end of the winnowing basket (1) and the rear of the comb tooth (3), respectively. When the winnowing basket (1) moves downward in the vertical direction relative to the winnowing basket (2), the comb tooth (3) is rotated by the traction rope and then retracts into the cleaning part (21).

4. A winnowing basket according to claim 2, characterized in that, When the drive structure includes a vertical rack (11) disposed at the lower end of the winnowing basket (1) and a back rack (31) disposed behind the comb (3), when the vertical rack (11) and the back rack (31) mesh, the back rack (31) is distributed on a circumference centered on the rotation center of the comb (3) and the winnowing basket (2).

5. A winnowing basket according to any one of claims 1-4, characterized in that, The comb (3) includes several teeth (33) arranged side by side in front, and the cleaning part (21) includes several cleaning grooves (22) arranged side by side. When the comb (3) is driven to rotate relative to the scoop (2), the teeth (33) retract or protrude from the cleaning grooves (22).

6. A winnowing basket according to claim 5, characterized in that, The winnowing basket (2) has shaft holes (23) or rotating shafts (34) on both sides, and the comb tooth (3) has rotating shafts (34) or shaft holes (23) on both sides. The winnowing basket (2) and the comb tooth (3) are rotatably connected through the shaft holes (23) and the rotating shafts (34); and / or An arc-shaped guide part (24) is provided behind the hopper (2), and an arc-shaped guide surface (35) is provided behind the comb tooth (3). The contact surfaces of the arc-shaped guide part (24) and the arc-shaped guide surface (35) are located on the same circumference. The arc-shaped guide surface (35) is slidably arranged along the arc-shaped guide part (24), thereby allowing the comb tooth (3) to rotate relative to the hopper (2).

7. A winnowing basket according to any one of claims 1-4 and 6, characterized in that, It also includes a reset member (4), which drives the comb tooth (3) to pass through the cleaning part (21).

8. A winnowing basket according to claim 7, characterized in that, When the scoop (2) and the comb (3) are rotatably connected to the rotating shaft (34) through the shaft hole (23), the reset member (4) includes a torsion spring disposed between the comb (3) and the scoop (2), the torsion spring passing through the rotating shaft (34) and having its two ends abutting against the comb (3) and the scoop (2) respectively; and / or When the lower end of the winnowing basket (1) is movably connected to the winnowing basket (2) and can move vertically relative to the winnowing basket (2), and a driving structure is provided between the winnowing basket (1) and the comb tooth (3), the reset member (4) is a spring provided between the winnowing basket (1) and the winnowing basket (2). The upper and lower ends of the spring abut against the lower end of the winnowing basket (1) and the winnowing basket (2) respectively. The spring drives the winnowing basket (1) to move upward in the vertical direction, and then drives the comb tooth (3) to pass through the cleaning part (21) through the driving structure.

9. A winnowing basket according to any one of claims 1-4, 6, and 8, characterized in that, When the lower end of the winnowing basket (1) is movably connected to the winnowing basket (2), a guide structure is provided between the winnowing basket (1) and the winnowing basket (2), and the guide structure guides the winnowing basket (1) to move in the vertical direction relative to the winnowing basket (2).

10. A winnowing basket according to claim 9, characterized in that, The guiding structure includes a first guiding structure formed by a guide groove (25) or guide block (13) disposed on the hopper (2) and a guide block (13) or guide groove (25) disposed at the lower end of the hopper rod (1). When the hopper rod (1) moves vertically relative to the hopper (2), the guide block (13) slides within the guide groove (25); and / or The guide structure includes a second guide structure formed by a guide hole (26) above the scoop (2) and the rod of the scoop rod (1), the rod passing through the guide hole (26), and the rod sliding within the guide hole (26) when the scoop rod (1) moves vertically relative to the scoop (2).

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