Arc-shaped comb feeding and wind auxiliary stick screen type walnut collecting device

Abstract

The present application relates to the technical field of walnut processing, and discloses an arc comb feeding and air-assisted roller screen type walnut collecting device, which comprises a rack, an arc comb feeding mechanism, a transition conveying belt mechanism, an air-assisted roller screen type separation mechanism, a sundry diversion separation mechanism, a bamboo basket replacement conveying mechanism and a power mechanism, the arc comb feeding mechanism is used for directional gathering, loose release and preliminary separation of mixtures such as walnuts and branches and leaves, and the transition conveying belt mechanism is used for conveying the mixtures that are poked and sent; the air-assisted roller screen type separation mechanism is used for buffer conveying, rolling diversion of the mixtures and separation of walnuts and sundries such as branches and leaves; the sundry diversion separation mechanism is used for diversion of the sundries such as branches and leaves after separation, so that the sundries are discharged outside the collecting device; and the bamboo basket replacement conveying mechanism is used for collecting the separated walnuts and transporting the collected walnuts. The present application has the characteristics of high conveying stability, high separation efficiency and low walnut breakage rate.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery technology, and more specifically, to an arc-shaped comb and wind-assisted roller sieve type walnut collecting device. Background Technology

[0002] During walnut harvesting, a large amount of branches, leaves, and other impurities are usually mixed in. Current processing methods mostly involve manual sorting or simple sieving equipment. Manual sorting is not only labor-intensive and inefficient, but the sorting quality is also greatly affected by human factors, making it difficult to meet the needs of large-scale production.

[0003] Many existing mechanized separation devices use a single screening structure. Due to the uneven differences in shape, quality, and volume between walnuts and impurities, screening alone is insufficient for complete separation. Furthermore, the metal screening components of such equipment are prone to causing collision damage to walnuts during continuous operation, and problems such as material accumulation and blockage can occur, resulting in unsatisfactory separation effects and hindering continuous and efficient field operations. Summary of the Invention

[0004] The purpose of this invention is to address the technical problems existing in the prior art by providing an arc-shaped comb and air-assisted roller screen type walnut collecting device, in which each mechanism is continuously arranged along the material conveying direction to form a continuous walnut separation path.

[0005] To address the problems mentioned above, the technical solution adopted by this invention is as follows: This invention provides an arc-shaped combing and wind-assisted roller sieve walnut collecting device, including a frame, an arc-shaped combing mechanism, a transition conveyor belt mechanism, a wind-assisted roller sieve separation mechanism, a debris guiding and separation mechanism, a bamboo basket replacement conveying mechanism, and a power mechanism, wherein the power mechanism provides power to the arc-shaped combing mechanism and the transition conveyor belt mechanism; The arc-shaped combing mechanism is used to directionally gather, loosen, and initially separate the mixture of walnuts and branches and leaves, and to convey the mixture to the transition conveyor belt mechanism. The transition conveyor belt mechanism is used to transport the fed mixture to the air-assisted roller screen separation mechanism; The wind-assisted roller screen separation mechanism is used for buffering and conveying the mixture, rolling and guiding the flow, and separating walnuts from impurities such as branches and leaves; The debris guiding and separating mechanism is used to guide the separated branches, leaves and other debris to be discharged outside the collection device; The bamboo basket replacement conveying mechanism is used to collect the separated walnuts and transport the collected walnuts.

[0006] Furthermore, the arc-shaped combing mechanism includes a feeding assembly and a comb tooth assembly. The feeding assembly includes a feeding hopper and grid bars. The feeding hopper has a hollow structure with an arc-shaped bottom. Multiple grid bars are provided on the inner side wall of the feeding hopper, and a separation gap is formed between adjacent grid bars. The comb assembly includes a connecting shaft and a comb unit. The connecting shaft is connected to the power mechanism. Multiple comb teeth are provided on the connecting shaft along the axial and circumferential directions. The connecting shaft is located at the opening end of the feed hopper, and multiple grid bars are staggered with the corresponding comb teeth.

[0007] Furthermore, the feed hopper has an asymmetrical structure, with the lowest point offset towards the comb unit; each grid bar includes a connected straight segment and an arc segment, with the arc segment positioned close to the comb unit.

[0008] Furthermore, the comb unit includes a plurality of evenly arranged comb teeth, which have an arc-shaped curved structure, including an arc segment and a curved segment, wherein the bending direction of the curved segment is the same as the rotation direction of the connecting shaft.

[0009] Furthermore, the transition conveyor belt mechanism includes a conveyor belt, a driving roller, and a driven roller. The driving roller and the driven roller are arranged opposite to each other. The driving roller is connected to the power mechanism, and the conveyor belt is arranged between the driving roller and the driven roller.

[0010] Furthermore, the power mechanism includes an engine, an engine drive pulley, a primary transmission belt, a primary driven pulley, a secondary drive pulley, a secondary transmission belt, and a comb-tooth driven pulley. The end of the drive roller is provided with a primary driven pulley and a secondary drive pulley in sequence. The engine drive pulley is connected to the primary driven pulley through the primary transmission belt. The end of the connecting shaft is provided with a comb-tooth driven pulley, and a secondary transmission belt is provided between the secondary drive pulley and the comb-tooth driven pulley.

[0011] Furthermore, the corresponding ends of the driving roller and the driven roller are respectively provided with a first balance pulley and a second balance pulley, and a balance belt is sleeved on the first balance pulley and the second balance pulley.

[0012] Furthermore, the wind-assisted roller screen separation mechanism includes two sets of conveying units, a centrifugal fan located above the conveying units, and a ventilation duct connected to the centrifugal fan. The two sets of conveying units each include multiple parallel first conveying rollers and second conveying rollers. One end of the first conveying roller and the second conveying roller are respectively fixed on the frame, and the other ends of the two are staggered and inclined, forming a screening gap between adjacent conveying rollers; the air outlet of the ventilation duct corresponds to the position of the conveying unit.

[0013] Furthermore, the debris guiding and separating mechanism includes multiple inclined debris guiding plates, each set of debris guiding plates corresponding to a set of conveying units, and the inclination direction is opposite to that of the corresponding first conveying roller or second conveying roller.

[0014] Furthermore, the bamboo basket replacement conveying mechanism is located at the end of the wind-assisted roller screen separation mechanism, including a walnut collection basket, a bamboo basket placement plate, multiple conveying rollers and a conveying plate. The bamboo basket placement plate is horizontally arranged at the end of the conveying plate for placing the walnut collection basket. The conveying plate is inclined at an offset from the horizontal direction and is provided with multiple conveying rollers for sliding and translating the walnut collection basket.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) The present invention provides power through a power mechanism, and through the coordinated cooperation of an arc combing mechanism, a transition conveyor belt mechanism, a wind-assisted roller screen separation mechanism, a debris guiding and separation mechanism and a bamboo basket replacement conveying mechanism, it achieves continuous, efficient and low-damage separation of walnuts and branches and leaves, and has the characteristics of high conveying stability, high separation efficiency and low walnut breakage rate.

[0016] (2) The arc-shaped comb feeding mechanism of the present invention achieves directional aggregation, continuous feeding and loose release of walnuts by cooperating with the feeding component and the comb tooth component; wherein, the feeding hopper with the asymmetric arc-shaped flow guide structure can improve the aggregation ability of walnuts to the comb tooth unit area, and the comb tooth with the arc-shaped curved structure can reduce the slippage and collision of walnuts during the lifting process, thereby improving the continuity of walnut conveying and reducing the walnut damage rate.

[0017] (3) The transition conveyor belt mechanism of the present invention drives the conveyor belt to work through the active roller and the driven roller, realizing the continuous transition of walnuts from the comb tooth feeding state to the stable conveying state, reducing the jumping and accumulation of walnuts, and improving the conveying stability and coordination between different mechanisms.

[0018] (4) The wind-assisted roller screen separation mechanism of the present invention achieves integrated separation of walnut buffer conveying, rolling flow guidance, gap screening and light impurity air separation by cooperating with the wooden conveying roller and the centrifugal fan structure; wherein the wooden conveying roller can effectively reduce the impact of walnut collision compared with the metal screen plate, and the frictional flow guidance effect of the conveying roller surface can achieve stable rolling conveying of walnut, thereby improving the walnut separation stability and reducing the walnut breakage rate.

[0019] (5) The debris diversion and separation mechanism of the present invention uses a debris diversion plate that is set in the opposite direction to the walnut conveying direction to discharge debris such as branches, leaves and debris along the side opposite to the walnut conveying direction, thereby realizing the spatial separation of walnuts and debris, reducing the probability of secondary mixing of debris and improving the purity of walnuts.

[0020] (6) The bamboo basket replacement conveying mechanism of the present invention realizes the automatic sliding out and quick replacement of the walnut collection basket through the conveying roller, thereby improving the continuous collection capacity of walnuts, reducing the labor intensity of manual handling, and improving the continuous operation efficiency of the equipment. Attached Figure Description

[0021] To more clearly illustrate the solutions in this invention, a brief introduction to the accompanying drawings used in the description of the embodiments will be provided below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without any creative effort. Wherein: Figure 1 This is a structural diagram of the walnut collecting device in this invention.

[0022] Figure 2 This is a structural diagram of the arc-shaped comb feeding mechanism in this invention.

[0023] Figure 3 This is a front view of the arc-shaped comb feeding mechanism in this invention.

[0024] Figure 4 This is a schematic diagram of the structure of the conveying transition and screening air separation in this invention.

[0025] Figure 5 This is a schematic diagram of the wind-assisted roller screen separation mechanism in this invention.

[0026] Figure 6 This is a schematic diagram of the bamboo basket replacement and conveying structure in this invention.

[0027] Explanation of reference numerals in the attached drawings: 1-Arc-shaped combing mechanism, 2-Transition conveyor belt mechanism, 3-Air-assisted roller screen separation mechanism, 4-Debris guiding and separating mechanism, 5-Bamboo basket replacement conveying mechanism, 6-Power mechanism, 7-Frame, 8-Walking wheel, 9-Feeding assembly, 91-Feeding hopper, 92-Grid bar, 921-Straight section, 922-Arc-shaped section, 10-Comb tooth assembly, 101-Connecting shaft, 102-Comb tooth unit, 103-Comb tooth, 1031-Circular arc section, 1032-Bent section, 11-Conveyor belt, 12-... 13-Driven roller, 14-Engine drive pulley, 15-First-stage transmission belt, 16-First-stage driven pulley, 17-Second-stage drive pulley, 18-Second-stage transmission belt, 19-Comb tooth driven pulley, 20-First balance pulley, 21-Second balance pulley, 22-Balance belt, 23-Conveying unit, 24-Debris guide plate, 25-Centrifugal fan, 26-Ventilation duct, 27-Walnut collection basket, 28-Bamboo basket placement plate, 29-Conveying roller, 30-Universal caster, 31-Conveying plate. Detailed Implementation

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. For example, terms such as “length,” “width,” “upper,” “lower,” “left,” “right,” “front,” “rear,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer” indicate orientations or positions based on the orientations or positions shown in the accompanying drawings and are for ease of description only, and should not be construed as limiting the technical solution.

[0029] The terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this invention are intended to cover non-exclusive inclusion; the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish different objects, not to describe a particular order. In the specification, claims, and accompanying drawings of this invention, when an element is referred to as "fixed to," "mounted to," "disposed of," or "connected to" another element, it may be directly or indirectly located on that other element. For example, when an element is referred to as "connected to" another element, it may be directly or indirectly connected to that other element.

[0030] Furthermore, the reference to "embodiment" herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments.

[0031] It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0032] See Figure 1 As shown, this invention provides an arc-shaped combing and pneumatically assisted roller screen walnut collecting device, including a frame 7, an arc-shaped combing mechanism 1, a transition conveyor belt mechanism 2, a pneumatically assisted roller screen separation mechanism 3, a debris guiding and separating mechanism 4, a bamboo basket replacement conveying mechanism 5, and a power mechanism 6, all arranged sequentially along the material conveying direction to form a continuous walnut separation path. The power mechanism 6 provides power to the arc-shaped combing mechanism 1 and the transition conveyor belt mechanism 2.

[0033] The arc-shaped combing mechanism 1 is used to directionally gather, loosen, and initially separate the mixture of walnuts and branches and leaves, and to convey the mixture to the transition conveyor belt mechanism 2. The transition conveyor belt mechanism 2 is used to transport the fed mixture to the air-assisted roller screen separation mechanism 3; The wind-assisted roller screen separation mechanism 3 is used for buffering and conveying the mixture, rolling and guiding the flow, and separating walnuts from impurities such as branches and leaves; The debris guiding and separating mechanism 4 is used to guide the separated branches, leaves and other debris to be discharged outside the collection device; The bamboo basket replacement conveyor 5 is used to collect the separated walnuts and transport them.

[0034] In this embodiment, power is provided by the power mechanism 6, and the continuous, efficient and low-damage separation of walnuts and branches and leaves is achieved through the coordinated cooperation of the arc-shaped combing mechanism 1, the transition conveyor belt mechanism 2, the wind-assisted roller screen separation mechanism 3, the debris guiding and separation mechanism 4, and the bamboo basket replacement conveying mechanism 5. It has the advantages of high conveying stability, high separation efficiency, low walnut breakage rate and strong adaptability to continuous field operation.

[0035] As attached Figure 2 Appendix Figure 3 As shown, the arc-shaped combing mechanism 1 includes a feeding assembly 9 and a combing assembly 10. The feeding assembly 9 includes a feeding hopper 91 and multiple grid bars 92. The feeding hopper 91 is a hollow structure with an arc-shaped bottom. Multiple grid bars 92 are provided on the inner side wall of the feeding hopper 91, and a separation gap is formed between adjacent grid bars 92.

[0036] The comb assembly 10 includes a connecting shaft 101 and a comb unit 102. The connecting shaft 101 is connected to the power mechanism 6. Multiple comb teeth 103 are provided on the connecting shaft 101 along the axial and circumferential directions. The connecting shaft 101 is located at the open end of the feed hopper 91. Multiple grid bars 92 are staggered with the corresponding comb teeth 103, that is, when the comb unit 102 rotates, it passes through the side wall of the feed hopper 91.

[0037] Specifically, the feed hopper 91 has an asymmetrical structure, with the lowest point offset by 50mm to 80mm, preferably 70mm, towards the comb unit 102. This can enhance the directional flow of walnuts to the comb area and allow the walnuts to automatically gather in the feeding area under gravity. At the same time, some small debris can be pre-screened through the separation gap.

[0038] Each grid bar 92 includes a connected straight segment 921 and an arc segment 922, with the arc segment 922 positioned close to the comb unit 102. The radius of the arc segment 922 is 100mm to 150mm, and can be 100mm, 110mm, 120mm, 130mm, 140mm, 150mm, or any value within that range. The angle between the straight segment 921 and the horizontal direction is 25° to 35°, and can be 25°, 30°, 35°, or any value within that range, facilitating smooth flow of the mixture and reducing jamming, while also preventing the mixture from spilling out of the feed hopper 91.

[0039] Specifically, the width of each grid bar 92 is 8mm to 15mm, and can be 8mm, 10mm, 12mm, 15mm or any value within the range. The separation gap between adjacent grid bars 92 is 15mm to 25mm, and can be 15mm, 18mm, 20mm, 22mm, 25mm or any value within the range.

[0040] Furthermore, the comb unit 102 includes a plurality of evenly arranged comb teeth 103. The comb teeth 103 have an arc-shaped curved structure, including an arc segment 1031 and a curved segment 1032. The bending direction of the curved segment 1032 is the same as the rotation direction of the connecting shaft 101.

[0041] Specifically, the radius of the arc segment 1031 on the comb teeth 103 is 240mm~300mm, and can be 240mm, 255mm, 270mm, 285mm, 300mm or any value within the range. The curved segment 1032 adopts an arc structure or an arc shape, preferably an arc structure, so that the end of the comb teeth 103 forms a smooth covering surface, with a radius of 20mm~30mm, and can be 20mm, 22mm, 25mm, 27mm, 30mm or any value within the range, to improve the limiting support ability during the walnut feeding process and reduce walnut slippage and collision damage.

[0042] Specifically, the width of the comb teeth 103 is 8mm to 15mm, and can be 8mm, 10mm, 12mm, 15mm or any value within the range; the spacing between adjacent comb teeth 103 is 15mm to 25mm, and can be 15mm, 18mm, 20mm, 22mm, 25mm or any value within the range. If the value is too small, it will cause the walnuts to get stuck, and if the value is too large, it will reduce the interception efficiency of impurities. Therefore, the above parameter range can take into account both the smoothness of conveying and the preliminary screening effect.

[0043] In this embodiment, during the rotation and conveying of walnuts by the comb teeth 103, the curved section 1032 of the comb teeth 103 provides limiting support for the walnuts, reducing the probability of slippage during lifting and throwing, thereby improving the stability and continuous conveying capacity of the walnuts. The comb teeth 103 are evenly distributed along the circumference of the connecting shaft 101 and rotate at a speed of approximately 40 rpm to 60 rpm, realizing the continuous conveying and lifting of walnuts. During operation, the comb teeth 103 continuously lift and convey the walnuts accumulated in the feed hopper 91, changing the walnuts from a concentrated accumulation state to a loose distribution state, improving the subsequent separation efficiency and reducing clogging.

[0044] As attached Figure 4As shown, the transition conveyor belt mechanism 2 includes a conveyor belt 11, a drive roller 12, and a driven roller 13. The drive roller 12 and the driven roller 13 are arranged opposite each other. The drive roller 12 is connected to the power mechanism 6 via power transmission. The conveyor belt 11 is arranged between the drive roller 12 and the driven roller 13. The conveyor belt 11 runs at a speed of 0.6 m / s. After being thrown by the comb teeth 103, the walnuts fall onto the conveyor belt 11, realizing the conversion from throwing motion to stable conveying motion, thereby reducing the impact and jumping of the walnuts and improving the stability of material conveying.

[0045] The power mechanism 6 includes an engine, an engine drive pulley 14, a primary transmission belt 15, a primary driven pulley 16, a secondary drive pulley 17, a secondary transmission belt 18, and a comb-tooth driven pulley 19. The end of the drive roller 12 is sequentially provided with a primary driven pulley 16 and a secondary drive pulley 17. The engine drive pulley 14 is connected to the primary driven pulley 16 via the primary transmission belt 15. The end of the connecting shaft 101 is provided with a comb-tooth driven pulley 19, and a secondary transmission belt 18 is arranged between the secondary drive pulley 17 and the comb-tooth driven pulley 19 to achieve power transmission.

[0046] Specifically, the engine operation drives the engine drive pulley 14 to rotate, and transmits power to the first-level driven pulley 16 through the first-level transmission belt 15, thereby driving the drive drum 12 to rotate and making the conveyor belt 11 run. At the same time, the second-level drive pulley 17 rotates synchronously with the drive drum 12, and transmits power to the comb driven pulley 19 through the second-level transmission belt 18, thereby driving the connecting shaft 101 and the comb assembly 10 to operate at a set speed. This realizes the coordinated operation between the arc-shaped combing mechanism 1 and the transition conveyor belt mechanism 2, avoids material accumulation or conveying interruption caused by speed mismatch, and improves the coordination and stability of the whole machine operation.

[0047] Furthermore, the corresponding ends of the driving roller 12 and the driven roller 13 are respectively provided with a first balance pulley 20 and a second balance pulley 21, and a balance belt 22 is sleeved on the first balance pulley 20 and the second balance pulley 21.

[0048] Specifically, the balance belt 22 is used to adjust the tension of the conveyor belt 11 to ensure that it remains stable during operation and to prevent deviation or slippage due to slack. In actual operation, after the walnuts are initially separated and lifted by the arc-shaped combing mechanism 1, they are thrown onto the conveyor belt 11 of the transition conveyor belt mechanism 2 by the comb unit 102. At this time, the material distribution tends to be uniform and the impact force is significantly reduced, providing stable feeding conditions for the efficient operation of the subsequent air-assisted roller screen separation mechanism 3.

[0049] As attached Figure 5As shown, the air-assisted roller screen separation mechanism 3 includes two sets of conveying units 23, a centrifugal fan 25 mounted on the frame 7 and located above the conveying units, and a ventilation duct 26 connected to the centrifugal fan 25. Each of the two conveying units 23 includes multiple parallel first conveying rollers 23a and second conveying rollers 23b. One end of each of the first and second conveying rollers 23a and 23b is fixed to the frame 7, while the other ends are staggered vertically and inclined downwards, forming a screening gap between adjacent conveying rollers. The air outlet of the ventilation duct 26 corresponds to the position of the conveying unit 23. The centrifugal fan 25 provides a directional airflow with a velocity of approximately 8 m / s to the area of ​​the conveying unit 23 through the ventilation duct 26.

[0050] Specifically, after the walnuts fall onto the conveyor rollers (23a, 23b) of the conveying unit 23, they roll forward on the surface of the rollers (23a, 23b), while smaller twigs and debris fall through the screening gaps. The conveyor rollers (23a, 23b) can be made of wood, which, compared to traditional metal screens, can effectively reduce the impact force during the walnuts' fall and minimize surface damage. Simultaneously, the wooden surface of the conveyor rollers (23a, 23b) has a certain frictional guiding effect, allowing the walnuts to roll stably along the direction of the conveying unit 23, improving the stability of material transport. At the same time, the airflow generated by the centrifugal fan 25 can blow away lightweight debris such as leaves, thus achieving coordinated separation through screening and air classification.

[0051] The debris guiding and separating mechanism 4 is located below the conveying unit 23. The debris guiding and separating mechanism 4 includes multiple inclined debris guiding plates 24. Each set of debris guiding plates 24 corresponds to a set of conveying units 23 and is inclined in the opposite direction to the corresponding conveying rollers (23a, 23b). That is, its inclination direction is opposite to the walnut conveying direction, and the inclination angle is 5° to 10°, preferably 7°.

[0052] Specifically, the debris guiding and separating mechanism 4 causes the branches and leaves falling from the screening gap of the conveying unit 23 to slide and be discharged to the other side along the debris guiding plate 24 under the combined action of gravity and wind, thereby realizing the spatial separation of walnuts and debris and preventing debris from mixing into the walnuts again.

[0053] In this embodiment, because the first conveying roller 23a and the second conveying roller 23b are staggered vertically and tilted downwards, the walnuts slide towards the axial direction and gradually concentrate in the central area of ​​the conveying path, which is beneficial for the precise docking and collection of the bamboo basket replacement conveying mechanism 5. At the same time, the staggered arrangement of the conveying rollers can prolong the residence time of the material in the separation area, improving the sufficiency of screening and air separation. During the rolling process, the walnuts automatically adjust their posture due to their own weight and the friction of the roller surface, making their outline more consistent with the conveying direction, further reducing damage caused by mutual collision and tumbling.

[0054] As attached Figure 6 As shown, the bamboo basket replacement conveying mechanism 5 is located at the end of the wind-assisted roller screen separation mechanism 3, and includes a walnut collection basket 27, a bamboo basket placement plate 28, multiple conveying rollers 29, and a conveying plate 31. The bamboo basket placement plate 28 is horizontally positioned at the end of the conveying plate 31 for placing the walnut collection basket 27. One end of the conveying plate 31 is offset from the horizontal direction and inclined, and multiple conveying rollers 29 are provided on the conveying plate 31 for sliding and translating the walnut collection basket 27.

[0055] Specifically, multiple conveyor rollers 29 are arranged in parallel, with a spacing of 40mm to 60mm between adjacent conveyor rollers 29, preferably 50mm, and are arranged at an overall angle. A caster wheel 30 is also provided on the other end of the conveyor plate 31 opposite to the bamboo basket placement plate 28 for easy movement and position adjustment.

[0056] In this embodiment, the separated walnuts eventually enter the walnut collection basket 27. When the walnut collection basket 27 is full, it can automatically slide out along the conveyor roller 29 under the action of gravity, and the operator can then quickly replace it with a new walnut collection basket 27. The universal wheels 30 enable flexible transportation of the device, thereby realizing continuous collection operations, improving work efficiency and reducing manual labor intensity.

[0057] The working process of this embodiment is as follows: The mixture of walnuts and branches / leaves first enters the feed hopper 91, where it gathers towards the area of ​​the comb unit 102 under the action of the arc-shaped guide. After the connecting shaft 101 drives multiple comb teeth 103 to rotate, the walnuts are continuously fed onto the conveyor belt 11, which then transports them to the area of ​​the wooden conveyor rollers (23a, 23b). The walnuts roll forward on the surface of the wooden conveyor rollers (23a, 23b), while branch debris and other impurities fall through the screening gaps, and leaves are blown away by the airflow generated by the centrifugal fan 25. The falling debris is discharged in the opposite direction under the action of the debris guide plate 24, achieving complete separation of the walnuts from the branches / leaves and other impurities. Finally, the walnuts are collected in the walnut collection basket 27.

[0058] This invention achieves a smooth transition and efficient separation of walnuts between various stages through the coordinated operation of multiple mechanisms, effectively solving problems such as easy clogging, high breakage rate, and incomplete separation in traditional collection methods. The machine has a compact structure, a clear power transmission path, and coordinated operation of each mechanism, which not only improves the continuity of operation but also significantly enhances its adaptability to complex working conditions.

[0059] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A walnut collecting device with an arc-shaped comb and a pneumatic roller sieve, characterized in that: It includes a frame, an arc-shaped combing mechanism mounted on the frame, a transition conveyor belt mechanism, a wind-assisted roller screen separation mechanism, a debris guiding and separation mechanism, a bamboo basket replacement conveying mechanism, and a power mechanism, wherein the power mechanism provides power to the arc-shaped combing mechanism and the transition conveyor belt mechanism; The arc-shaped combing mechanism is used to directionally gather, loosen, and initially separate the mixture of walnuts and branches and leaves, and to convey the mixture to the transition conveyor belt mechanism. The transition conveyor belt mechanism is used to transport the fed mixture to the air-assisted roller screen separation mechanism; The wind-assisted roller screen separation mechanism is used for buffering and conveying the mixture, rolling and guiding the flow, and separating walnuts from impurities such as branches and leaves; The debris guiding and separating mechanism is used to guide the separated branches, leaves and other debris to be discharged outside the collection device; The bamboo basket replacement conveying mechanism is used to collect the separated walnuts and transport the collected walnuts.

2. The arc-shaped comb and air-assisted roller sieve walnut collecting device according to claim 1, characterized in that: The arc-shaped combing mechanism includes a feeding assembly and a comb tooth assembly. The feeding assembly includes a feeding hopper and grid bars. The feeding hopper has a hollow structure with an arc-shaped bottom. Multiple grid bars are provided on the inner side wall of the feeding hopper, and a separation gap is formed between adjacent grid bars. The comb assembly includes a connecting shaft and a comb unit. The connecting shaft is connected to the power mechanism. Multiple comb teeth are provided on the connecting shaft along the axial and circumferential directions. The connecting shaft is located at the opening end of the feed hopper, and multiple grid bars are staggered with the corresponding comb teeth.

3. The arc-shaped comb and air-assisted roller sieve walnut collecting device according to claim 2, characterized in that: The feed hopper has an asymmetrical structure, with its lowest point offset towards the comb unit; each grid bar includes a connected straight segment and an arc segment, with the arc segment positioned close to the comb unit.

4. The arc-shaped comb and air-assisted roller sieve walnut collecting device according to claim 2, characterized in that: The comb unit includes multiple evenly arranged comb teeth, which have an arc-shaped curved structure, including an arc segment and a curved segment. The bending direction of the curved segment is the same as the rotation direction of the connecting shaft.

5. The arc-shaped comb and air-assisted roller sieve walnut collecting device according to claim 2, characterized in that: The transition conveyor belt mechanism includes a conveyor belt, a drive roller, and a driven roller. The drive roller and the driven roller are arranged opposite to each other. The drive roller is connected to the power mechanism, and the conveyor belt is arranged between the drive roller and the driven roller.

6. The arc-shaped comb and air-assisted roller sieve walnut collecting device according to claim 5, characterized in that: The power mechanism includes an engine, an engine drive pulley, a primary transmission belt, a primary driven pulley, a secondary drive pulley, a secondary transmission belt, and a comb-tooth driven pulley. The end of the drive roller is provided with a primary driven pulley and a secondary drive pulley in sequence. The engine drive pulley is connected to the primary driven pulley through the primary transmission belt. The end of the connecting shaft is provided with a comb-tooth driven pulley, and a secondary transmission belt is provided between the secondary drive pulley and the comb-tooth driven pulley.

7. The arc-shaped comb and air-assisted roller sieve walnut collecting device according to claim 5, characterized in that: The corresponding ends of the driving roller and the driven roller are respectively provided with a first balance pulley and a second balance pulley, and a balance belt is sleeved on the first balance pulley and the second balance pulley.

8. The arc-shaped comb and air-assisted roller sieve walnut collecting device according to claim 1, characterized in that: The wind-assisted roller screen separation mechanism includes two sets of conveying units, a centrifugal fan located above the conveying units, and a ventilation duct connected to the centrifugal fan. The two sets of conveying units each include multiple parallel wooden first and second conveying rollers. One end of the first conveying roller and the second conveying roller are respectively fixed on the frame, and the other ends of the two are staggered and inclined, forming a screening gap between adjacent conveying rollers; the air outlet of the ventilation duct corresponds to the position of the conveying unit.

9. The arc-shaped comb and air-assisted roller sieve type walnut collecting device according to claim 8, characterized in that: The debris guiding and separating mechanism includes multiple inclined debris guiding plates. Each set of debris guiding plates corresponds to a set of conveying units and is in the opposite direction of inclination to the corresponding first or second conveying roller.

10. The arc-shaped comb and air-assisted roller sieve walnut collecting device according to claim 8, characterized in that: The bamboo basket replacement conveying mechanism is located at the end of the wind-assisted roller screen separation mechanism, and includes a walnut collection basket, a bamboo basket placement plate, multiple conveying rollers and a conveying plate. The bamboo basket placement plate is horizontally set at the end of the conveying plate for placing the walnut collection basket. The conveying plate is inclined off the horizontal direction and is provided with multiple conveying rollers for sliding and translating the walnut collection basket.

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