Pickup and collection device using the same

Abstract

The present invention belongs to the technical field of agricultural machinery, and specifically relates to a picker and a collecting device using the picker. The present invention is proposed to solve the defect that the picking needle of the existing straw picker is prone to deflection when picking in a non-flat area, thereby causing missed picking. The picker adopts an annular motion mechanism, which includes a picking wheel and picking needles arranged and distributed on the outer periphery of the picking wheel. The annular motion mechanism is also provided with an active boosting mechanism that actively extends the picking needle toward the ground and a straightening device that is arranged between the picking needle and the picking wheel and has a straightening picking needle. The picking needle is used to make the object to be picked up adhere to the picking wheel and take it off the ground. The collecting device using the picker includes a picker and comb teeth, the comb teeth are arranged at the discharge end of the picker, and the picker is arranged at the front, side or rear of the collecting device. The present invention effectively avoids the occurrence of the situation where the picking needle is blocked and deflected or offset during the picking process.

Description

Technical Field

[0001] The invention belongs to the technical field of agricultural machinery, and in particular relates to a picker and a collecting device using the picker. Background Art

[0002] In order to improve the efficiency of picking up agricultural waste such as straw, mechanical picking methods are widely used. As an important component of the baler, the picker picks up agricultural waste such as grass strips or straw scattered on the ground and transports them to the feed end of the baler, thereby realizing mechanized picking and baling operations. However, the failure rate of existing pickers is high and the picking rate is not high. The reason is that the existing straw balers are converted from forage balers, and the principles and structures of the two are exactly the same. Since most of the forage grass is planted in flat areas on plains or slopes, the picker in the forage picking operation does not contact the ground surface, and crops such as corn are usually planted on ridges with height differences, which leads to uneven picking ground. When picking up ridged cultivated land, the spring teeth of the picker can only have limited contact with the straw in the ridge ditch when embedded in the ridge soil. The high-speed rotating picker continuously whips the straw cage platform and the surface soil at high speed. While picking up the straw, it also inhales a large amount of surface nutrient soil (commonly known as black soil), which causes the problem of high soil content in the straw bale and loss of nutrient soil. In addition, the picker's spring teeth and the overall structure will also cause abnormal rapid wear due to this non-standard use, resulting in a high missed pick rate and increased energy consumption of the equipment. Although domestic baler imitation manufacturers have also discovered problems such as high failure rate and difficult maintenance, and use shaftless horizontal spring tooth pickers to replace traditional spring tooth pickers, the picking principle is still the same. It is only at the expense of the use function that the difficulty of maintenance is limitedly reduced, but the problems of high missed pick rate of the equipment and high soil content of the bale still exist. Moreover, after the picker has been used for a period of time, the picking equipment is still severely worn due to the unevenness of the picking ground, resulting in an increase in the missed pick rate again. The defect caused by switching from flat ground picking operations to ridge crop waste picking has not been truly solved, bringing unnecessary usage costs to users.

[0003] In the existing patent literature, for example, the patent application number is CN202110568353.1, and the patent name is a picker and a collecting device using the picker. It has been proposed to change the operating principle of the existing picker through picking methods such as contoured clamps and thorns. The patent effectively overcomes the problems of missed detection rate and equipment loss rate of existing equipment. However, in the contoured picker, some picking needles are flexibly connected to the picking wheels, which makes the picking needles extremely susceptible to resistance from the ground or agricultural waste during the picking process, causing the extended picking needles to deflect or offset in the process of piercing the object to be picked up, resulting in insufficient piercing force, poor piercing position and other problems, which in turn affects the picking efficiency. At the same time, it will also affect the picking needle. Summary of the invention

[0004] In order to overcome the defect that when the existing straw picker is picking up in a non-flat area, the picking needle is prone to deflect during the picking process, thereby causing the equipment to miss the picking, the present invention provides a picker and a collecting device using the picker. During the picking process, the picker can effectively improve the picking rate of agricultural waste generated by ridge crops such as corn stalks through the combination of bionic picking method, contour structure design and picking needle correction function, while reducing the missed detection rate and equipment failure rate.

[0005] The technical solution adopted by the present invention is: a picker, which is an annular motion mechanism, which includes a picking wheel and picking needles inserted and distributed on the outer circumference of the picking wheel, and the annular motion mechanism is also provided with an active boosting mechanism for actively extending the picking needles toward the ground and a straightening device arranged between the picking needles and the picking wheel for straightening the picking needles. When the picking wheel rolls, the active boosting mechanism applies an ejecting force toward the ground to the top of the picking needles in contact with the ground, and cooperates with the straightening device to correct the movement direction of the picking needles, so that the ejected picking needles extend vertically toward the ground relative to the side wall of the picking wheel, pierce or clamp the objects to be picked up scattered on the ground on the picking wheel, and bring them away from the ground.

[0006] Preferably, the straightening device is sleeved and restricted on the outside of the picking needle, and when the picking needle is extended, it is coaxial with the straightening device.

[0007] Preferably, a limiting cavity is processed on the inner wall of the straightening device, and an external protrusion is provided on the outer wall of the picking needle. The external protrusion can be engaged in the limiting cavity with an axial or longitudinal clearance state. When the external protrusion moves toward the outlet direction of the limiting cavity with the picking needle, the external protrusion can slide axially and engage with the bottom of the limiting cavity.

[0008] Preferably, the longitudinal section of the outer protrusion is in the shape of a double cone, and the inner diameter of the middle portion of the limiting cavity is larger than the outer diameter of the outer protrusion.

[0009] Preferably, a flexible matching mechanism is further provided between the straightening device and the picking needle, wherein the flexible matching mechanism is sleeved on the picking needle and installed outside the outlet of the straightening device.

[0010] Preferably, a sharp thorn portion for piercing the object to be picked up is provided at the picking end of the picking needle.

[0011] Preferably, the spike portion is a cone or a double cone.

[0012] Preferably, a baffle matching the curvature of the pickup wheel is also provided on the outer side of the pickup wheel.

[0013] A picker having a contour-profiling function comprises at least two groups of pickers as described above arranged in parallel, each group of pickers being mounted on a picker mounting frame and combinedly connected through a common connecting device, and each group of pickers being able to swing independently according to the height of the ground to achieve contour-profiling picking of the ground.

[0014] A collecting device using a picker includes a picker and comb teeth. The picker uses the above-mentioned picker. The comb teeth are arranged at the discharge end of the picker to peel off the attachments from the picking needle and the picking wheel. The picker is arranged at the front, side or rear of the collecting device to transport the peeled attachments from the discharge end of the picker to the feed end of the collecting device.

[0015] The beneficial effects of the present invention are:

[0016] 1. The present invention uses a bionic picking method of pricking and clamping to create a precedent for a non-powered picker. Compared with traditional straw balers, it can effectively reduce the power demand by more than 40%, greatly reducing fuel consumption and the operating cost of straw leaving the field. Moreover, through this bionic picking method, the soil content in the straw bag can be effectively reduced from the source. At the same time, by adding a straightening device to the picker, the picking needle is kept in a vertical state when it is pushed out to the ground, which can effectively prevent the picking needle from being blocked and deflected or offset during the picking process due to the resistance of the ground or agricultural waste, affecting the stability of the picking needle picking up the object to be picked up, and further improving the picking efficiency and the service life of the picking needle.

[0017] 2. The present invention effectively avoids the problem of the existing horizontal spring-tooth picker being damaged due to the uneven terrain and having a low pick-up rate when used in non-plain areas through the contoured friction contact between each annular motion mechanism and the ground. In addition, the existing picker needs to collect agricultural waste in advance before picking it up, while the present invention is based on the bionic picking technology and contoured structure, and does not need to collect scattered agricultural waste in advance before picking it up, which greatly saves manpower and picking time.

[0018] 3. In order to improve the picking rate and reduce the missed detection rate, the present invention adopts a piercing picking method to pick up agricultural waste, which has the advantages of simple structure, wide application range, high picking efficiency, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a single set of pickers;

[0020] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0021] Figure 3It is a position relationship diagram between the picking needle, the picking wheel and the correction device;

[0022] Figure 4 It is a schematic diagram of the structure of picking up needles;

[0023] Figure 5 is a cross-sectional view of the straightening device;

[0024] Figure 6 It is a position relationship diagram of the picking needle and the straightening device in a locked state when the top of the picking needle is forced to extend downward;

[0025] Figure 7 It is a position relationship diagram of the picking needle and the straightening device in the engaged state when the bottom side of the picking needle is subjected to force;

[0026] Figure 8 It is a structural schematic diagram of a pick-up with a profiling function;

[0027] Among them: 1 annular motion mechanism, 11 picking wheel, 12 picking needle, 120 needle rod, 121 needle cap, 122 outer protrusion, 13 comb teeth, 14 baffle, 2 picker mounting frame, 21 support arm, 22 connecting shaft, 3 rubber sleeve, 4 cam, 5 spike part, 6 fixed shaft, 7 straightening device, 71 straightening shell, 72 limit cavity. DETAILED DESCRIPTION

[0028] Various exemplary embodiments, features and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0029] The term "and / or" herein is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the term "at least one" herein represents any combination of at least two of any one or more of a plurality of. For example, including at least one of A, B, and C can represent including any one or more elements selected from the set consisting of A, B, and C.

[0030] In this paper, according to the different positions of the picked-up objects during the picking process, they are defined as: objects to be picked up, attached objects, and peeled objects.

[0031] The present invention relates to a picker, which picks up agricultural waste to be picked up from the ground by piercing and clamping. The picking method is obviously different from the existing horizontal spring-tooth picker. The existing spring-tooth picker relies on high-speed rotating horizontal spring teeth to apply kinetic energy to the ground objects to be picked up, so that they bounce up from the ground and achieve the picking effect in a hook-belt manner.

[0032] The picker described in this embodiment includes an annular motion mechanism 1 and a picker mounting frame 2 for installing the annular motion mechanism 1. The annular motion mechanism 1 includes a picking wheel 11 and a picking needle 12. The picking wheel 11 is the main structure of the picker, and its outer contour can be circular or non-circular. When a non-circular shape such as an elliptical or polygonal shape is adopted, the regularly arranged ridge furrows and ridge platforms form a catenary, so that the non-circular picking wheel 11 can move smoothly on the catenary, and the non-circular picking wheel 11 can realize the non-ridge operation of the picker. When a circular shape is adopted, the ridge operation of the picker can be realized.

[0033] Under the action of external force, the annular motion mechanism 1 rolls on the object to be picked up, so that the picking needle 12 contacts the object to be picked up. At the same time, through the gravity of the picker itself, the picking end of the picking needle 12 pierces into the object to be picked up or into the gap between the objects to be picked up, and relies on the bionic method of piercing and clamping to separate the object to be picked up from the ground, and make the object to be picked up adhere to the picking wheel 11 and move synchronously, thereby achieving the picking effect.

[0034] The picking wheel 11 in this embodiment is composed of a rim, a hub and spokes. The rim is concentrically sleeved on the outer side of the hub, and the spokes are evenly installed circumferentially between the rim and the hub. The rim can adopt a continuous arc curve or a plurality of discontinuous arc curves.

[0035] The wheel hub of the pickup wheel 11 can be installed on the pickup mounting frame 2, and the pickup mounting frame 2 includes two symmetrically arranged support arms 21 and a connecting shaft 22 fixed between the two support arms 21. The upper ends of the two support arms 21 are sleeved on the fixed shaft 6. The pickup wheel 11 is sleeved on the connecting shaft 22 of the pickup mounting frame 2 and rolls on the object to be picked up.

[0036] The picking needles 12 are vertically arranged on the side wall of the picking wheel 11, and the picking end of each picking needle 12 is located on the outside of the picking wheel 11, and the picking end of each picking needle 12 is located on the inside of the picking wheel 11. The picking needles 12 are made of a hard material, such as a metal rod, and are used to pierce or clamp the object to be picked up. Preferably, each picking needle 12 is perpendicular to the tangent of the side wall of the picking wheel 11 where it is located.

[0037] The picking needle 12 includes a needle rod 120, a needle cap 121 and an outer protrusion 122. The needle cap 121 is hemispherical and is threadedly mounted on the top of the needle rod 120. The side where the needle cap 121 is located is the control end of the picking needle 12, and the bottom end of the picking needle 12 is the picking end. The outer protrusion 122 is fixed to the outer periphery of the needle rod 120 and is arranged close to the control end of the picking needle 12. The longitudinal section of the outer protrusion 122 is a conical protrusion that gradually extends toward the outer periphery along the diameter of the needle rod 120. Preferably, the longitudinal section of the outer protrusion 122 is a biconical shape. This embodiment is described by taking the biconical outer protrusion 122 as an example, but the shape of the outer protrusion 122 is not limited thereto.

[0038] An active pressurizing mechanism is provided at the bottom of the pickup mounting frame 2, and the active pressurizing mechanism is used to push the pickup needle 12 in contact with the ground toward the ground.

[0039] The active boosting mechanism includes a cam 4, the raised portion of which is arranged toward the ground. When the picking needle 12 moves to the bottom of the picking wheel 11, since a fixed cam 4 is arranged, when the control end of the picking needle 12 contacts the raised portion of the cam 4, the cam 4 applies a downward pressure toward the ground to the picking needle 12 that moves to that position, so that the area where the working end of the picking needle 12 pierces the object to be picked up is reduced, and the pressure is increased, which can effectively improve the picking efficiency of the object to be picked up; when the control end of the picking needle 12 loses the ejection force of the cam 4, the picking needle 12 gradually returns to its original state (i.e., the picking needle 12 retracts) under the action of gravity.

[0040] In addition, the picker of this structure can not only pick up scattered objects to be picked up, but also dig up the roots of straw buried in the soil. The cam 4 applies downward pressure to the pick-up needle 12, so that the pick-up needle 12 penetrates into the surface soil. At the same time, the traction force of the pick-up wheel 11 is used to lift the roots of the straw to the outside of the ground, so as to dig up the roots of the straw. The active booster mechanism in this embodiment uses the pick-up needle 12 as a lever, and uses the lever principle to save distance to achieve efficient digging.

[0041] In order to improve the picking needle 12 in the process of extending, can maintain the vertical to the picking needle 12 in the picking wheel 11 side wall tangent, a straightening device 7 is provided between the picking wheel 11 and the picking needle 12. The straightening device 7 is fixed on the picking wheel 11, and sleeved on the outside of the picking needle 12.

[0042] The straightening device 7 is composed of a hollow hard straightening shell 71, and a limiting cavity 72 for accommodating the picking needle 12 and the outer protrusion 122 is processed inside the straightening shell 71. The upper and lower ends of the limiting cavity 72 are both connected to the outside of the straightening shell 71, and the outer protrusion 122 is slidably limited in the limiting cavity 72. For easy installation, the straightening shell 71 is composed of an upper shell and a lower shell. The lower shell is fixed on the picking wheel 11, and the lower end of the picking needle 12 is passed through the limiting cavity 72 of the lower shell, and the upper end of the picking needle 12 is passed through the limiting cavity 72 of the upper shell. Then, the upper shell is fixed to the lower shell by means of threading, welding, etc., and finally the needle cap 121 is fixed to the needle rod 120.

[0043] When the picking needle 12 is in a non-picking state, the outer protrusion 122 can be engaged in the limiting cavity 72 in an axial or longitudinal clearance state; when the picking needle 12 is in a downwardly extended picking state, the needle cap 121 of the picking needle 12 is subjected to force, so that the picking needle 12 drives the outer protrusion 122 to slide axially toward the outlet direction of the limiting cavity 72, and the outer protrusion 122 is completely engaged and restricted to the bottom of the limiting cavity 72 (that is, the outlet side of the limiting cavity 72). At this time, the outer protrusion 122 is coaxial with the straightening device 7, and the picking end of the picking needle 12 is convenient for piercing into the gap inside the object to be picked up or between the objects to be picked up, thereby achieving the purpose of picking up.

[0044] In addition, according to the above embodiment, a flexible matching mechanism may be added at the outlet of the straightening device 7 to assist in supporting the picking needle 12 during the moving process.

[0045] The flexible matching mechanism is fixedly arranged on the picking needle 12, and a mounting groove for embedding the flexible matching mechanism is also processed at the outlet of the straightening device 7, and the depth of the mounting groove is greater than the displacement of the picking needle 12 axially moving in the limiting cavity 72. This embodiment is introduced by taking the rubber sleeve 3 as an example of the flexible matching mechanism, but the material selection and shape of the flexible matching mechanism are not limited to this. When the needle cap 121 on the picking needle 12 is subjected to force, the picking needle 12 is in the process of extending, and the rubber sleeve 3 arranged at the outlet of the straightening device 7 enables the picking needle 12 to maintain a stable linear motion state.

[0046] When the picking needle 12 is in a non-picking stress state, the picking needle 12 slides and engages in the limiting cavity 72 according to the stress direction, and the rubber sleeve 3 generates elastic deformation in the installation groove according to the swing direction of the picking needle 12.

[0047] In addition, according to the above embodiment, in order to reduce the contact area between the picking needle 12 and the object to be picked up and increase the penetration force of the picking needle 12 when piercing the object to be picked up, a spike portion 5 is added to the picking end of each picking needle 12.

[0048] A spike portion 5 is added to the picking end of each picking needle 12, and the spike portion 5 can be conical. When the picking needle 12 moves along with the picking wheel 11, the spike portion 5 is used to pierce the object to be picked up, and the object to be picked up and the picking needle 12 move synchronously to form an attachment on the picking wheel 11. Further preferably, the spike portion 5 can be composed of a multi-stage truncated cone with a conical end to form a ratchet spike portion.

[0049] By providing the spike portion 5, the contact area between the picking needle 12 and the object to be picked up is reduced, and gravity is used to increase the pressure acting on the object to be picked up, so that the picking wheel 11 can pick up the object to be picked up during the rolling process, which can effectively prevent the object to be picked up from accidentally falling during the rotation of the picking wheel 11.

[0050] In order to improve the separation efficiency between the object to be picked up and the picking needle 12 , the spike portion 4 may also adopt a double cone structure, which facilitates the spike portion 4 to penetrate into the object to be picked up and facilitates the rapid separation of the object to be picked up and the picking needle 12 .

[0051] In addition, according to the above embodiment, in order to improve the feeding effect of the picking needle 12 during the picking process and prevent the attachments attached to the picking wheel 11 from falling off during the rotation of the picking wheel 11, a baffle 14 can also be provided on the outside of the picking wheel 11.

[0052] The baffle 14 is an arc-shaped hard plate that matches the arc of the pickup wheel 11. It is fixedly mounted on the pickup mounting frame 2, and the baffle 14 is located on the side of the pickup wheel 1 where the attachment is located. When the pickup wheel 11 rolls on the object to be picked up, the object to be picked up is clamped or inserted on the pickup needle 12. As the object to be picked up continues to rotate with the pickup wheel 1, attachments are formed on the pickup wheel 1. By setting the baffle 14, the attachment is squeezed toward the pickup wheel 11, so that the attachment fits the pickup needle 12 better, and the missed pickup rate is reduced.

[0053] In addition, according to the above embodiment, comb teeth 13 for peeling off the attachments attached to the picking wheel 11 or the picking needle 12 may be further provided at the discharging end of the picking wheel 11 .

[0054] One end of the comb teeth 13 is fixed between the two arms 21, and keeps a fixed position relative to the pick-up wheel 11, and the other end of the comb teeth 13 is suspended in the gap between the pick-up needles 12. The comb teeth 13 are composed of a plurality of hard bars arranged at intervals, such as metal bars. When the pick-up needles roll with the pick-up wheel 11, when the attachment attached to the pick-up wheel 11 and clamped between adjacent pick-up needles 12 moves to the comb teeth 13, the comb teeth 13 separate the attachment from the pick-up wheel 11 and the pick-up needles 12.

[0055] In addition, according to the above-described embodiments, in order to improve the overall efficiency of picking up and make the picker suitable for different terrains, this embodiment introduces a picker with an emulation function, which includes at least two groups of pickers as described in the above-described embodiments.

[0056] Each group of pickers is connected in combination through a common connection device. Preferably, each group of pickers is arranged in parallel, and the common connection device can share a fixed shaft 6, or other devices that can achieve the same effect. Multiple groups of pickers installed on the same fixed shaft 6 can swing independently in the same mode. During the operation, the annular motion mechanism 1 in each group of pickers adjusts the accompanying height according to the terrain height of its location to adapt to the contacted landform features, thereby achieving the contour with the ground, and then the picking needle 12 in the annular motion mechanism 1 clamps and pierces the object to be picked up to achieve bionic picking. The picker with contouring function described in this embodiment is not only suitable for plain areas, but also for mountainous areas, plateaus, and hilly areas, and is particularly suitable for picking up agricultural waste such as straw in ridges. In order to achieve synchronous and efficient picking of ridges and ridges, according to the actual width of the ridge, the overall width of the single or multiple groups of pickers located in the ridge is matched with the width of the ridge, thereby improving the picking rate in the ridge.

[0057] In addition, according to the above embodiments, the picker described in any one of the above embodiments can be applied to a collecting device, and the collecting device is a baler (also called a baler or a baler).

[0058] At present, there are two main types of balers, one is the round bale baler represented by the F5500 produced by McHale, and the other is the square bale baler represented by the LSB series of Kuhn. The two types of balers represent the principles of picking up, bale forming and tying of most or even all balers on the market. The shape of the bale is determined by the bale forming module and the tying module, and the above balers all use the same technical solution of horizontal spring teeth as the pick-up.

[0059] The above-mentioned baler mainly includes: a picking module, a bale forming module and a tying module. During operation, a tractor with at least 90 horsepower is used as a traction, and the tractor's PTO output shaft is connected to the power input shaft of the baler. The PTO power is distributed to the picking module and the bale forming module by the power distribution mechanism of the baler to drive the picking module and the forming module to work. Among them, the horizontal spring teeth in the picking module rotate in the opposite direction to the forward direction during operation.

[0060] The pickup module in the above-mentioned existing baler is replaced with the pickup described in any of the above-mentioned embodiments, so that the pickup no longer requires power input such as PTO or other power units, effectively reducing the overall horsepower requirement of the baler and achieving the purpose of reducing energy consumption.

[0061] The pick-up device of the baler described in this embodiment, during operation, attaches the object to be picked up to the pick-up needle 12 by the friction force generated by rolling on the ground. The PTO power is only responsible for the power input of the bale forming module. When the bale size is the same, the power requirement is only 50%-60% of that of the traditional baler, which greatly reduces the fuel consumption of the operation.

[0062] In the description of the above technical solutions, the pick-up device described in the above embodiments is combined with the existing round bale baler to form a baler different from the existing picking principle. Those skilled in the art should understand that by combining the bale forming module with the pick-up device described in the above embodiments with other shapes of pick-up mounting frames 2 or through other structural forms, the same technical solution as the present embodiment can be obtained without any creative work.

[0063] In addition, since the rotation speed of the picking wheel 11 is the same as the ground speed of the tractor, and the picking needle 12 does not rub against the ground and does not whip the surface soil, the soil content in the straw bale can be effectively reduced.

[0064] In addition, according to the above-mentioned embodiments, the picker described in any of the above-mentioned embodiments can be applied to another collecting device, the collecting device is a grass baler, which includes a picker arranged beside the baler, and the picker picks up the objects to be picked up scattered on the ground and conveys them to the baler. The picker can be the picker described in any of the above-mentioned embodiments. The picker is arranged on one side or both sides of the baler according to the size of the working width, and the discharge end of the picker conveys the materials to the feed end of the baler.

[0065] In addition, according to the above-described embodiments, the picker described in any of the above-described embodiments can be applied to another collecting device, which is a cage truck, including a picker arranged at the rear of the cage truck, and the picker is used to pick up the objects to be picked up scattered on the ground and transported to the cage truck. The picker can be the picker described in any of the above-described embodiments.

[0066] The above are only preferred specific embodiments of the present invention, which are all different implementations based on the overall concept of the present invention, and the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A picker, the picker is a ring-shaped motion mechanism, the ring-shaped motion mechanism comprises a pick-up wheel and a pick-up needle disposed on the periphery of the pick-up wheel, characterized in that: The annular motion mechanism is also provided with an active boosting mechanism for actively extending the picking needle toward the ground, and a straightening device provided between the picking needle and the picking wheel and having the picking needle straightened. The inner wall of the straightening device is processed with a limited cavity, and the straightening device is sleeved and restricted on the outside of the picking needle. When the picking wheel rolls, the active boosting mechanism applies an ejecting force toward the ground to the top of the picking needle in contact with the ground, so that the picking needle extends out, and at the same time cooperates with the straightening device to correct the movement direction of the picking needle so that it is coaxial with the straightening device. The ejected picking needle extends toward the ground in a vertical shape relative to the side wall of the picking wheel where it is located, pierces or clamps the objects to be picked up scattered on the ground on the picking wheel, and brings them off the ground.

2. A pick-up device as claimed in claim 1, characterized in that: An outer protrusion is provided on the outer wall of the picking needle, and the outer protrusion can be engaged in the limiting cavity in an axial or longitudinal clearance state. When the outer protrusion moves toward the outlet direction of the limiting cavity with the picking needle, the outer protrusion can slide axially and engage with the bottom of the limiting cavity.

3. A pick-up device as claimed in claim 2, characterized in that: The longitudinal section of the outer protrusion is in the shape of a double cone, and the inner diameter of the middle part of the limiting cavity is larger than the outer diameter of the outer protrusion.

4. A pick-up device as claimed in claim 1 or 3, characterized in that: A flexible matching mechanism is also provided between the straightening device and the picking needle. The flexible matching mechanism is sleeved on the picking needle and installed outside the outlet of the straightening device.

5. A pick-up device as claimed in claim 4, characterized in that: A sharp thorn portion for piercing the object to be picked up is arranged at the picking end of the picking needle.

6. A pick-up device as claimed in claim 5, characterized in that: The spike portion is a cone or a double cone.

7. A pick-up device according to any one of claims 1 to 3, characterized in that: A baffle matching the arc of the picking wheel is also arranged on the outer side of the picking wheel.

8. A pick-up device, characterized in that: The pickup has a contour-profiling function and comprises at least two groups of pickups as described in any one of claims 1 to 7 arranged in parallel, each group of pickups being mounted on a pickup mounting frame and combinedly connected through a common connecting device, and each group of pickups can independently swing according to the height of the ground to achieve contour-profiling picking of the ground.

9. A collection device using a picker, characterized in that: It includes a picker and comb teeth, the picker adopts the picker as described in any one of claims 1-8, the comb teeth are arranged at the discharge end of the picker, and are used to peel off the attachments from the picking needle and the picking wheel, and the picker is arranged at the front, side or rear of the collecting device, and is used to transport the peeled attachments from the discharge end of the picker to the feed end of the collecting device.

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