Stepped conveying and grading mechanism of novel tea-leaf picker

Abstract

A stepped conveying and grading mechanism of a novel tea-leaf picker comprises a feeding mechanism and a grading mechanism, and the grading mechanism is arranged at the rear position above the feeding mechanism; the feeding mechanism comprises at least one feeding unit, each feeding unit comprises a first conveying assembly and a second conveying assembly, and a first conveying channel and a feeding port are formed between the first conveying assembly and the second conveying assembly; the grading mechanism at least comprises a grading unit, the grading unit comprises a third conveying assembly and a fourth conveying assembly, the third conveying assembly is arranged at the position above the first conveying assembly and behind the first conveying assembly, the fourth conveying assembly is arranged at the position above the second conveying assembly and behind the second conveying assembly, and a second conveying channel is formed between the third conveying assembly and the fourth conveying assembly; when tea is picked, long tea leaves are still clamped and transported by the grading mechanism and are separated from the second discharging opening in the rear end of the grading mechanism after being separated from the first feeding mechanism, and short tea leaves are directly separated from the first discharging opening in the rear end of the first feeding mechanism, so that the tea leaves are graded according to the length of the tea leaves during picking.

Description

Technical Field

[0001] This utility model relates to the field of tea picking, specifically a stepped conveying and grading mechanism for a new type of tea picking machine. Background Technology

[0002] my country has the largest number of tea drinkers and is the origin of tea, with a long history of tea production. It also has the highest standards globally for the quality of raw tea materials, such as uniform size and moderate length. Different sizes of tea leaves need to be sorted, picked, and processed. Traditionally, tea is harvested manually. While this allows for control over the size of the harvested leaves, there are still differences between each person's harvest, making precise control impossible. Furthermore, labor costs are rising, and the number of tea workers is decreasing, making it unrealistic to rely solely on manual harvesting to control tea size.

[0003] With the rapid pace of mechanization, reciprocating tea-picking machines are now readily available on the market. For example, the tea-picking machine disclosed in CN108207313A includes a chassis with a walking mechanism at the bottom, a column on the chassis, and a shear unit mounted on a shear support. The shear unit is arranged in an arc shape that matches the curved surface of the tea tree crown A. The shear support is connected to the column, and a pneumatic blowing pipe and a tea collection bag are mounted on the shear support. The airflow from the pneumatic blowing pipe points towards the opening of the tea collection bag. The shear unit is located between the outlet of the pneumatic blowing pipe and the opening of the tea collection bag. The tea leaves cut by the shear unit are immediately blown towards the opening of the tea collection bag by the airflow from the pneumatic blowing pipe. Thus, as the tea-picking machine moves and cuts, the tea leaves are promptly collected into the tea collection bag. Once the tea collection bag has collected a suitable amount of tea leaves, it can be replaced or the tea leaves inside can be emptied and transferred.

[0004] For example, the electric tea-picking machine disclosed in CN102783309A has a specific structure in which the upper output shaft of the motor is fixed to the impeller of the fan, the lower output shaft of the DC motor is fixed to the central shaft of the crankshaft disk, the two eccentric pins of the crankshaft disk are movably connected to the large end of the upper and lower connecting rods respectively, and the small end of the upper and lower connecting rods are movably connected to the upper and lower blades respectively. Alternatively, the lower output shaft of the DC motor is set as an external gear shaft, which meshes with the internal gear of an inner and outer diameter gear, and the external gear of the inner and outer diameter gear meshes with the outer diameter edge gear of the crankshaft disk.

[0005] The aforementioned technical solution involves cutting off everything entering the shearing range and indiscriminately feeding it into the storage silo. The harvested tea leaves include a mixture of new shoots, dwarf leaves, tender leaves, old leaves, and tea stems. Most of these raw materials are unsuitable for use, requiring manual sorting, which increases labor costs and is inefficient. Therefore, a grading tea-picking machine is needed to grade the raw materials during harvesting and prevent tea branches and leaves from entering the feeding mechanism and causing blockages or jams, thus solving the aforementioned problems. (Seals and related functions and drawings have been deleted.) Utility Model Content

[0006] The purpose of this utility model is to provide a new type of stepped conveying and grading mechanism for tea picking machines, which enables the grading of tea leaves according to their length during tea picking. This achieves mechanized picking, avoids the subsequent screening process, and improves the efficiency of tea picking, thereby solving the existing technical defects and unmet technical requirements.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a stepped conveying and grading mechanism for a novel tea-picking machine, comprising a feeding mechanism and a grading mechanism, wherein the grading mechanism is located above and behind the feeding mechanism;

[0008] The feeding mechanism includes at least one feeding unit, the feeding unit includes a first conveying component and a second conveying component, a first conveying channel and a feed inlet are formed between the first conveying component and the second conveying component, the feed inlet gradually narrows from the front end of the feeding unit to the first conveying channel, and the feed inlet is formed by at least two inclined surfaces;

[0009] A grading mechanism, comprising at least one grading unit, wherein the grading unit corresponds one-to-one with the feeding unit, the grading unit comprising a third conveying component and a fourth conveying component, the third conveying component being positioned above and slightly behind the first conveying component, the fourth conveying component being positioned above and slightly behind the second conveying component, and a second conveying channel being formed between the third conveying component and the fourth conveying component.

[0010] The tea leaves are gathered into the first conveying channel from the inlet. The feeding unit clamps and transports the tea leaves through the first conveying component and the second conveying component. Shorter tea leaves fall from the rear end of the first conveying channel to the first preset position, while longer tea leaves are continuously clamped and transported along the second conveying channel to the second preset position, thereby achieving the grading of tea leaves of different lengths.

[0011] In this application, it is necessary to further explain that the feed inlet is located at the front end of the conveying channel, and the discharge outlet is located at the rear end of the conveying channel, and the three are connected in sequence. From the two inclined surfaces mentioned above, it can be reasonably understood that the discharge outlet is located between the first conveying component and the second conveying component, and the two inclined surfaces are respectively located on the first conveying component and the second conveying component. In addition, the reference standard for front and rear in this application is: the part that comes into contact with the tea leaves first is the front, and the part that comes into contact with the tea leaves last is the rear.

[0012] Preferably, the adjacent feeding units and the grading units are symmetrically arranged, and the first conveying channels in each feeding unit are parallel to each other, the second conveying channels in each grading unit are parallel to each other, and the front ends of the two adjacent first conveying components and the two adjacent second conveying components are provided with swinging leaf-picking components. The swinging leaf-picking components can comb the tea leaves to both sides and assist the tea leaves to enter the first conveying channel.

[0013] In this application, the above content can be understood as follows: the oscillating blade is rotatably connected to the base, and one end of it extends forward at an angle to the front of each pair of adjacent and identical conveying components.

[0014] Preferably, each conveying assembly includes a conveyor belt and multiple pulleys. The conveyor belt is fitted around several pulleys to form a loop. Several protrusions are provided on the outer side wall of the pulleys to prevent the conveyor belt from falling off the pulleys.

[0015] Preferably, it also includes a base, which is respectively disposed at one end of a plurality of pulleys, and the pulleys are rotatably connected to the base.

[0016] Preferably, the first conveying assembly includes: a first pulley, a second pulley, a third pulley, a first conveyor belt, and a first base. The first pulley is disposed on the first base at a front end position, the third pulley is disposed on the first base at a rear end position, the second pulley is located between the first pulley and the third pulley, and the first conveyor belt is sleeved on the first pulley, the second pulley, and the third pulley.

[0017] The second conveying assembly includes a fourth pulley, a fifth pulley, a sixth pulley, a second conveyor belt, and a second base. The fourth pulley is located at the front end of the second base, the sixth pulley is located at the rear end of the second base, the fifth pulley is located between the fourth and sixth pulleys, and the second conveyor belt is sleeved over the fourth, fifth, and sixth pulleys.

[0018] The conveyor belt between the first and second pulleys forms an inclined surface around the feed inlet, and the conveyor belt between the fourth and fifth pulleys forms another inclined surface around the feed inlet. A first conveying channel is formed between the first conveyor belt between the second and third pulleys and the second conveyor belt between the fifth and sixth pulleys.

[0019] Preferably, the third conveying assembly includes a seventh pulley, an eighth pulley, a third conveyor belt, and a third base. The seventh pulley is located at the front end of the third base and is positioned above the third pulley. The third pulley rotates coaxially with the seventh pulley. The eighth pulley is located at the rear end of the third base. The third conveyor belt is sleeved around the seventh and eighth pulleys.

[0020] The fourth conveying assembly includes a ninth pulley, a tenth pulley, a fourth conveyor belt, and a fourth base. The ninth pulley is located at the front end of the fourth base and is above the fourth pulley. The fourth pulley rotates coaxially with the ninth pulley. The tenth pulley is located at the rear end of the fourth base. The fourth conveyor belt is sleeved over the ninth and tenth pulleys.

[0021] A second conveying channel is formed between the seventh conveyor belt and the ninth conveyor belt.

[0022] Preferably, the front end of the first conveying component is located at the rear side of the front end of the second conveying component.

[0023] Preferably, the third pulley is located at a position slightly forward or slightly backward on the side of the sixth pulley, so that the rear section of the first conveyor belt is offset from the rear section of the second conveyor belt, forming a first discharge port connected to the rear end of the first conveying channel;

[0024] The eighth pulley is located at a position slightly forward or backward on the side of the tenth pulley, so that the rear section of the third belt and the fourth belt are offset, forming a second discharge port connected to the rear end of the second conveying channel.

[0025] In this application, the rear ends of both the feeding unit and the grading unit are staggered in length. It needs further explanation that the staggered arrangement of the rear end of the feeding unit does not necessarily need to be synchronized with the staggered arrangement of the front end. That is, the staggered arrangement of the components at the rear end of the feeding unit can be the same as the staggered arrangement of the front end (the rear end of a component relative to another component is also positioned forward), or it can be staggered (the rear end of a component relative to another component is positioned backward). Since the third pulley rotates coaxially with the seventh pulley, and the fourth pulley rotates coaxially with the ninth pulley, the staggered arrangement of the front end of the grading unit is synchronized with the staggered arrangement of the rear end of the feeding unit. However, it should be further emphasized that the staggered arrangement of the rear end of the grading unit can also be either synchronized or staggered with the staggered arrangement of the front end.

[0026] Preferably, the first conveying channel in the feeding unit and the second conveying channel in the corresponding second feeding unit are located in the same vertical plane, and the width of the first conveying channel and the second conveying channel are the same, and the width of each is no greater than 5mm.

[0027] Preferably, the top of both the first base and the second base is provided with a swinging blade component. The swinging blade component is provided with a rotating end, a free end, and a driven component. The rotating end is rotatably connected to the base, the free end extends out of the base in a direction away from the base, and the driven component is located between the free end and the rotating end of the swinging blade component.

[0028] Both the second and fifth pulleys are provided with eccentric wheel portions. The first and second bases are also each provided with elastic elements. The oscillating blade on the first base abuts against the eccentric wheel portion on the second pulley via a driven member. The elastic element on the first base abuts against the driven member on the side away from the second pulley. The oscillating blade on the second base abuts against the eccentric wheel portion on the fifth pulley via a driven member. The elastic element on the second base abuts against the driven member on the side away from the fifth pulley. The oscillating drive of the oscillating blade is completed by the rotation of the second and fifth pulleys respectively.

[0029] In this application, it is necessary to further explain that the eccentric wheel part mentioned above is a type of cam structure, while in this application, the eccentric wheel is only one type. It can be understood that the oscillation of the oscillating paddle in this application is achieved through a cam structure.

[0030] Compared with the prior art, the beneficial effects of this utility model are:

[0031] 1. This utility model uses a feeding mechanism to transport tea leaves, and places a grading mechanism above and behind the feeding mechanism. This allows longer tea leaves to be held by the grading mechanism before they leave the first feeding mechanism, and even after they leave, they are still held and transported by the grading mechanism, exiting from the second discharge port at the rear of the grading mechanism. Shorter tea leaves, on the other hand, exit directly from the first discharge port at the rear of the first feeding mechanism. This achieves grading of tea leaves according to their length during harvesting, realizing mechanized harvesting and avoiding subsequent screening processes, thus improving the efficiency of tea harvesting. Furthermore, both the first feeding mechanism and the grading mechanism use belts with gaps to hold and transport the tea leaves, avoiding damage and improving the quality of the harvested tea leaves. The staggered arrangement of the conveying components to form the first and second discharge ports also facilitates the detachment of tea leaves.

[0032] 2. Each feeding unit and grading unit of this application has multiple protrusions on its pulley. When the belt is sleeved on the pulley, the pulley can stably abut against the conveyor belt, preventing the belt from falling off the pulley when the feeding mechanism is running.

[0033] 3. This application uses a swinging leaf-dispensing component to assist in sorting tea leaves. When encountering dense and complex tea leaves, the swinging body moves the tea leaves to help them enter the feeding mechanism better and more efficiently through the inlet, thereby improving harvesting efficiency and harvesting net yield. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0035] Figure 2 This is a partial structural diagram of the present invention;

[0036] Figure 3 This is a top view of the overall structure of the feeding unit in this utility model;

[0037] Figure 4 This is a top view of the overall structure of the hierarchical unit in this utility model;

[0038] Figure 5 This is a schematic diagram of the overall structure of the oscillating leaf-deflecting component in this utility model;

[0039] Figure 6 This invention relates to the position and connection relationship of the driven component.

[0040] In the diagram: 1. First conveying assembly; 2. Second conveying assembly; 3. First conveying channel; 4. Inlet; 5. Third conveying assembly; 6. Fourth conveying assembly; 7. Second conveying channel; 8. Oscillating blade; 9. Protrusion; 10. First pulley; 11. Second pulley; 12. Third pulley; 13. First conveyor belt; 14. First base; 15. Fourth pulley; 16. Fifth pulley; 17. Sixth pulley; 18. Second conveyor belt; 19. Second base; 20. Seventh pulley; 21. Eighth pulley; 22. Third conveyor belt; 23. Third base; 24. Ninth pulley; 25. Tenth pulley; 26. Fourth conveyor belt; 27. Fourth base; 28. First outlet; 29. ​​Second outlet; 30. Rotating end; 31. Free end; 32. Driven component; 33. Elastic component. Detailed Implementation

[0041] The following will refer to the appendix in the embodiments of this utility model. Figure 1-6 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0042] 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 technical features indicated. Therefore, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0043] Please see Figure 1-6 Embodiments of this utility model:

[0044] Example:

[0045] like Figure 1-5 As shown: A stepped conveying and grading mechanism for a new type of tea picking machine, including a feeding mechanism and a grading mechanism, wherein the grading mechanism is located above and behind the feeding mechanism;

[0046] The feeding mechanism includes at least one feeding unit, which includes a first conveying component 1 and a second conveying component 2. A first conveying channel 3 and a feed inlet 4 are formed between the first conveying component 1 and the second conveying component 2. The feed inlet 4 gradually narrows from the front end of the feeding unit to the first conveying channel 3, and the feed inlet 4 is formed by at least two inclined surfaces.

[0047] A grading mechanism, comprising at least one grading unit, wherein the grading unit is positioned in a one-to-one correspondence with the feeding unit, wherein the grading unit comprises a third conveying component 5 and a fourth conveying component 6, wherein the third conveying component 5 is positioned above and rearward of the first conveying component 1, and the fourth conveying component 6 is positioned above and rearward of the second conveying component 2, wherein a second conveying channel 7 is formed between the third conveying component 5 and the fourth conveying component 6.

[0048] The tea leaves are gathered into the first conveying channel 3 from the feed inlet 4. The feeding unit clamps and transports the tea leaves through the first conveying component 1 and the second conveying component 2. Shorter tea leaves fall from the rear end of the first conveying channel 3 to the first preset position, while longer tea leaves are continuously clamped and transported along the second conveying channel 7 to the second preset position, thereby achieving the grading of tea leaves of different lengths.

[0049] In this embodiment, the tea leaves are transported by a feeding mechanism, and the grading mechanism is positioned above and behind the feeding mechanism. This allows longer tea leaves to be held by the grading mechanism before they leave the first feeding mechanism, and even after they leave, they remain held and transported by the grading mechanism, exiting from the second discharge port 29 at the rear of the grading mechanism. Shorter tea leaves, on the other hand, exit directly from the first discharge port 28 at the rear of the first feeding mechanism. This achieves grading of tea leaves based on their length during harvesting, thus realizing mechanized harvesting and avoiding subsequent screening processes, thereby improving the efficiency of tea harvesting. Furthermore, both the first feeding mechanism and the grading mechanism use belts with gaps to hold and transport the tea leaves, preventing damage and improving the quality of the harvested tea. The staggered arrangement of the conveying components to form the first discharge port 28 and the second discharge port 29 also facilitates the detachment of tea leaves.

[0050] like Figure 1 As shown: the adjacent feeding units and the grading units are symmetrically arranged, and the first conveying channels 3 in each feeding unit are parallel to each other, the second conveying channels 7 in each grading unit are parallel to each other, and the front ends of the two adjacent first conveying components 1 and the two adjacent second conveying components 2 are provided with swing leaf-picking parts 8. The swing leaf-picking parts 8 can comb the tea leaves to both sides and help the tea leaves enter the first conveying channel 3.

[0051] In this embodiment, the swinging leaf-picking component 8 is used to assist in sorting the tea leaves. When the tea leaves are very dense and complex, the swinging body moves the tea leaves to help them enter the feeding mechanism better and more efficiently along the feed inlet 4, thereby improving the harvesting efficiency and the net harvesting rate.

[0052] like Figure 3-4As shown: Each conveying assembly includes a conveyor belt and multiple pulleys. The conveyor belt is sleeved on the outside of several pulleys to form a loop. Several protrusions 9 are provided on the outer side wall of the pulleys to prevent the conveyor belt from falling off the pulleys.

[0053] In this embodiment, the protrusion 9 makes the vertical direction more stable when the conveyor belt and the pulley are in contact during transmission, preventing the conveyor belt from falling off the pulley. In addition, in the horizontal direction, it increases the contact force between the conveyor belt and the pulley, further increasing the stability of their transmission. Furthermore, the protrusion 9 also increases the contact area between the pulley and the conveyor belt, enhancing the contact stability between them.

[0054] like Figure 3 As shown: The first conveying assembly 1 includes: a first pulley 10, a second pulley 11, a third pulley 12, a first conveyor belt, and a first base 14. The first pulley 10 is disposed on the first base 14 at a front end position, the third pulley 12 is disposed on the first base 14 at a rear end position, the second pulley 11 is located between the first pulley 10 and the third pulley 12, the first conveyor belt is sleeved on the first pulley 10, the second pulley 11, and the third pulley 12, the second pulley 11 and the third pulley 12 are at the same distance from the first conveying channel 3, and this distance is less than the distance from the first pulley 10 to the first conveying channel 3;

[0055] The second conveying assembly 2 includes a fourth pulley 15, a fifth pulley 16, a sixth pulley 17, a second conveyor belt 18, and a second base 19. The fourth pulley 15 is located at the front end of the second base 19, and the sixth pulley 17 is located at the rear end of the second base 19. The fifth pulley 16 is located between the fourth pulley 15 and the sixth pulley 17. The second conveyor belt 18 is sleeved on the fourth pulley 15, the fifth pulley 16, and the sixth pulley 17. The fifth pulley 16 and the sixth pulley 17 are at the same distance from the first conveying channel 3, and this distance is less than the distance from the fourth pulley 15 to the first conveying channel 3.

[0056] The conveyor belt between the first pulley 10 and the second pulley 11 forms an inclined surface surrounding the feed inlet 4, and the conveyor belt between the fourth pulley 15 and the fifth pulley 16 forms another inclined surface surrounding the feed inlet 4. The first conveyor belt between the second pulley 11 and the third pulley 12 and the second conveyor belt 18 between the fifth pulley 16 and the sixth pulley 17 form a first conveying channel 3.

[0057] like Figure 4As shown: The third conveying assembly 5 includes a seventh pulley 20, an eighth pulley 21, a third conveyor belt 22, and a third base 23. The seventh pulley 20 is located at the front end of the third base 23 and is positioned above the third pulley 12. The third pulley 12 rotates coaxially with the seventh pulley 20. The eighth pulley 21 is located at the rear end of the third base 23. The third conveyor belt 22 is sleeved around the seventh pulley 20 and the eighth pulley 21.

[0058] The fourth conveying assembly 6 includes a ninth pulley 24, a tenth pulley 25, a fourth conveyor belt 26, and a fourth base 27. The ninth pulley 24 is located at the front end of the fourth base 27 and is positioned above the fourth pulley 15. The fourth pulley 15 rotates coaxially with the ninth pulley 24. The tenth pulley 25 is located at the rear end of the fourth base 27. The fourth conveyor belt 26 is sleeved around the ninth pulley 24 and the tenth pulley 25.

[0059] A second conveying channel 7 is formed between the seventh conveyor belt and the ninth conveyor belt.

[0060] like Figure 3 As shown: the front end of the first conveying component 1 is located on the side and rear of the front end of the second conveying component 2, and the horizontal position of the rotation center of the first pulley 10 is located between the rotation center of the fourth pulley 15 and the rotation center of the fifth pulley 16, so as to form a feed inlet 4 that is wider at the front and narrower at the back.

[0061] As shown in the figure: the third pulley 12 is located at a rear position on the side of the sixth pulley 17, so that the rear section of the first conveyor belt and the second conveyor belt 18 are staggered to form a first discharge port 28 connected to the rear end of the first conveying channel 3.

[0062] The eighth pulley 21 is located at a rearward position on the side of the tenth pulley 25, so that the rearward section of the third belt and the fourth belt are staggered, forming a second discharge port 29 connected to the rear end of the second conveying channel 7.

[0063] In this embodiment, for ease of production and assembly, all conveying components are set to the same model (same size and shape). Therefore, in this embodiment, since the front end of the conveying unit is set to be behind the front end of the first conveying component 1, the front end of the second conveying component 2 is also set to be synchronously set.

[0064] like Figure 1-2As shown: the first conveying channel 3 in the feeding unit and the second conveying channel 7 in the corresponding second feeding unit are located in the same vertical plane, and the width of the first conveying channel 3 and the second conveying channel 7 are the same, and the width of each is no more than 5mm.

[0065] like Figure 1 , 5 As shown in Figure 6: The top of the first base 14 and the second base 19 are both provided with a swinging blade 8. The swinging blade 8 is provided with a rotating end 30, a free end 31 and a driven member 32. The rotating end 30 is rotatably connected to the base. The free end 31 extends out of the base in a direction away from the base. The driven member 32 is located between the free end 31 and the rotating end 30 on the swinging blade 8.

[0066] Both the second pulley 11 and the fifth pulley 16 are provided with eccentric wheel portions. The first base 14 and the second base 19 are each provided with elastic elements. The swinging blade 8 on the first base 14 abuts against the eccentric wheel portion on the second pulley 11 through the driven member 32. The elastic element on the first base 14 abuts against the side of the driven member 32 away from the second pulley. The swinging blade 8 on the second base 19 abuts against the eccentric wheel portion on the fifth pulley 16 through the driven member 32. The elastic element on the second base 19 abuts against the side of the driven member 32 away from the fifth pulley. The swinging drive of the swinging blade 8 is completed by the rotation of the second pulley 11 and the fifth pulley 16 respectively.

[0067] In this embodiment, when the second or fifth pulley rotates, the eccentric wheel portion on it moves accordingly. When the most protruding part of the eccentric wheel portion moves the follower 32 to a distance, there is no other eccentric wheel portion on the second or fifth pulley to push it back to its original position. This prevents the other parts of the eccentric wheel portion on the second or fifth pulley from engaging with the follower 32. The elastic element is specifically a spring. The spring can push the follower 32, which has moved away from the second or fifth pulley after being pushed, towards the pulley. This ensures that the follower 32 can always be against the upper eccentric wheel portion. The cooperation between the upper eccentric wheel portion and the elastic element allows the oscillating blade 8 to swing as the upper eccentric wheel portion rotates.

[0068] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered illustrative and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0069] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A stepped conveying and grading mechanism for a novel tea-picking machine, characterized in that, It includes a feeding mechanism and a grading mechanism, wherein the grading mechanism is located above and rear of the feeding mechanism; The feeding mechanism includes at least one feeding unit, which includes a first conveying component (1) and a second conveying component (2). A first conveying channel (3) and a feed inlet (4) are formed between the first conveying component (1) and the second conveying component (2). The feed inlet (4) gradually narrows from the front end of the feeding unit to the first conveying channel (3), and the feed inlet (4) is formed by at least two inclined surfaces. The grading mechanism includes at least one grading unit, which corresponds one-to-one with the feeding unit. The grading unit includes a third conveying component (5) and a fourth conveying component (6). The third conveying component (5) is located above and behind the first conveying component (1), and the fourth conveying component (6) is located above and behind the second conveying component (2). A second conveying channel (7) is formed between the third conveying component (5) and the fourth conveying component (6). The tea leaves are gathered into the first conveying channel (3) from the feed inlet (4). The feeding unit clamps and transports the tea leaves through the first conveying component (1) and the second conveying component (2). The shorter tea leaves fall from the rear end of the first conveying channel (3) to the first preset position, while the longer tea leaves are continuously clamped and transported along the second conveying channel (7) to the second preset position, thereby achieving the grading of tea leaves of different lengths.

2. The stepped conveying and grading mechanism of a novel tea-picking machine according to claim 1, characterized in that, The adjacent feeding units and the grading units are symmetrically arranged, and the first conveying channels (3) in each feeding unit are parallel to each other, and the second conveying channels (7) in each grading unit are parallel to each other. The front ends of the two adjacent first conveying components (1) and the two adjacent second conveying components (2) are provided with leaf-picking swinging components (8). The leaf-picking swinging components (8) can oscillate the tea leaves to both sides and assist the tea leaves to enter the first conveying channel (3).

3. The stepped conveying and grading mechanism of a novel tea-picking machine according to claim 2, characterized in that, Each conveying assembly includes a conveyor belt and multiple pulleys. The conveyor belt is sleeved around several pulleys to form a loop. Several protrusions (9) are provided on the outer side wall of the pulleys to prevent the conveyor belt from falling off the pulleys.

4. The stepped conveying and grading mechanism of a novel tea-picking machine according to claim 3, characterized in that, It also includes a base, which is respectively disposed at one end of a plurality of pulleys, and the pulleys are rotatably connected to the base.

5. A stepped conveying and grading mechanism for a novel tea-picking machine according to claim 1, 2, 3, or 4, characterized in that, The first conveying assembly (1) includes: a first pulley (10), a second pulley (11), a third pulley (12), a first conveyor belt (13), and a first base (14). The first pulley (10) is located at the front end of the first base (14), the third pulley (12) is located at the rear end of the first base (14), the second pulley (11) is located between the first pulley (10) and the third pulley (12), and the first conveyor belt (13) is sleeved on the first pulley (10), the second pulley (11), and the third pulley (12). The second conveying assembly (2) includes a fourth pulley (15), a fifth pulley (16), a sixth pulley (17), a second conveyor belt (18), and a second base (19). The fourth pulley (15) is located at the front end of the second base (19), the sixth pulley (17) is located at the rear end of the second base (19), the fifth pulley (16) is located between the fourth pulley (15) and the sixth pulley (17), and the second conveyor belt (18) is sleeved on the fourth pulley (15), the fifth pulley (16), and the sixth pulley (17). The conveyor belt between the first pulley (10) and the second pulley (11) forms an inclined surface surrounding the feed inlet (4), and the conveyor belt between the fourth pulley (15) and the fifth pulley (16) forms another inclined surface surrounding the feed inlet (4). The first conveyor belt (13) between the second pulley (11) and the third pulley (12) and the second conveyor belt (18) between the fifth pulley (16) and the sixth pulley (17) form a first conveying channel (3).

6. The stepped conveying and grading mechanism of a novel tea-picking machine according to claim 5, characterized in that, The third conveying assembly (5) includes a seventh pulley (20), an eighth pulley (21), a third conveyor belt (22), and a third base (23). The seventh pulley (20) is located at the front end of the third base (23) and is above the third pulley (12). The third pulley (12) rotates coaxially with the seventh pulley (20). The eighth pulley (21) is located at the rear end of the third base (23). The third conveyor belt (22) is sleeved around the seventh pulley (20) and the eighth pulley (21). The fourth conveying assembly (6) includes a ninth pulley (24), a tenth pulley (25), a fourth conveyor belt (26), and a fourth base (27). The ninth pulley (24) is located at the front end of the fourth base (27) and is above the fourth pulley (15). The fourth pulley (15) rotates coaxially with the ninth pulley (24). The tenth pulley (25) is located at the rear end of the fourth base (27). The fourth conveyor belt (26) is sleeved around the ninth pulley (24) and the tenth pulley (25). A second conveying channel (7) is formed between the seventh conveyor belt (20) and the ninth conveyor belt (24).

7. The stepped conveying and grading mechanism of a novel tea-picking machine according to claim 6, characterized in that, The front end of the first conveying component (1) is located on the side rear of the front end of the second conveying component (2).

8. The stepped conveying and grading mechanism of a novel tea-picking machine according to claim 6 or 7, characterized in that, The third pulley (12) is located in a forward or backward position on the side of the sixth pulley (17), so that the first conveyor belt (13) and the rear section of the second conveyor belt (18) are staggered to form a first discharge port (28) connected to the rear end of the first conveying channel (3); The eighth pulley (21) is located at a position slightly forward or slightly backward on the side of the tenth pulley (25), so that the third conveyor belt (22) and the rear section of the fourth conveyor belt (26) are staggered to form a second discharge port (29) connected to the rear end of the second conveying channel (7).

9. The stepped conveying and grading mechanism of a novel tea-picking machine according to claim 8, characterized in that, The first conveying channel (3) in the feeding unit and the second conveying channel (7) in the corresponding second feeding unit are located in the same vertical plane, and the width of the first conveying channel (3) and the second conveying channel (7) are the same, and the width of each is no greater than 5mm.

10. The stepped conveying and grading mechanism of a novel tea-picking machine according to claim 5, characterized in that, The top of the first base (14) and the second base (19) are both provided with a leaf-shaped swing member (8). The leaf-shaped swing member (8) is provided with a rotating end (30), a free end (31) and a driven member (32). The rotating end (30) is rotatably connected to the base. The free end (31) extends out of the base in a direction away from the base. The driven member (32) is located between the free end (31) and the rotating end (30) on the leaf-shaped swing member (8). Both the second pulley (11) and the fifth pulley (16) are provided with eccentric wheel portions. The first base (14) and the second base (19) are also provided with elastic members. The leaf-shaped swing member (8) on the first base (14) abuts against the eccentric wheel portion on the second pulley (11) through the driven member (32). The elastic member on the first base (14) abuts against the side of the driven member (32) away from the second pulley. The leaf-shaped swing member (8) on the second base (19) abuts against the eccentric wheel portion on the fifth pulley (16) through the driven member (32). The elastic member on the second base (19) abuts against the side of the driven member (32) away from the fifth pulley. The swinging drive of the leaf-shaped swing member (8) is completed by the rotation of the second pulley (11) and the fifth pulley (16).

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