A tassel-picking structure for fresh corn

Abstract

This utility model proposes a corn ear-picking structure for fresh corn, relating to corn ear-picking technology. Specifically, it discloses a method that uses a threaded guide on the ear-picking roller to precisely guide the corn stalk into the working area, while simultaneously assisting in feeding and improving the stability of stalk conveying. A toothed straight-pull section is used to increase friction with the stalk, achieving a forced downward pull and solving the problems of ears failing to detach smoothly from the stalk and incomplete ear picking. The angle and gap between the two ear-picking rollers can be adjusted by the extension length of the hydraulic cylinder piston rod and the guide device, improving the adaptability of the ear-picking structure. Wear-resistant rubber pads are installed on the ear-picking plates, and the gap between the plates is adjustable, further reducing the occurrence of ear squeezing and pinching damage, achieving low-loss mechanical harvesting of fresh corn.

Description

Technical Field

[0001] This utility model relates to the field of corn ear-picking technology, and more specifically, to an ear-picking structure for fresh corn. Background Technology

[0002] The corn harvesting and ear-picking device is the core component of corn harvesting machinery, its main function being to separate the corn ears from the stalks. Traditional ear-picking devices, when mechanically picking ears of fresh sweet corn, are prone to damaging the kernels at the base of the ear due to the high moisture content, soft kernels, and low ear strength of the corn. Furthermore, if the picking device components make hard contact with the ear, it can cause scratches on the ear's surface or deformation. Fresh sweet corn includes several varieties such as sweet corn and waxy corn, with significant differences in ear size, thickness, and stalk toughness among different varieties. If the core parameters of the ear-picking device, such as the roller gap, are fixed, its adaptability will be greatly limited, making it difficult to accommodate the characteristics of different ear varieties: if the roller gap is too narrow, it can easily cause crushing damage to thinner ears; if the roller gap is too wide, it cannot effectively block thicker ears, resulting in incomplete ear picking.

[0003] Currently, the horizontal roller, vertical roller, or combined ear-picking plate harvesting devices used in existing fresh corn harvesting technologies all suffer from problems such as ear root damage, epidermal scratches, or deformation. Therefore, how to reduce mechanical harvesting damage to fresh corn has become an urgent technical problem to be solved in this field. Utility Model Content

[0004] The purpose of this invention is to provide a tassel-picking structure for fresh corn, which addresses the shortcomings of existing technologies and solves the problems mentioned in the background.

[0005] The technical solution of this utility model is implemented as follows: This utility model provides a picking structure for fresh corn, including two picking rollers that are longitudinally inclined on the same side of the header fixing frame; A transmission box is provided on the side of the header fixing frame away from the picking roller, and the transmission box is connected to the two picking rollers respectively. A hydraulic cylinder is installed on the header frame. One of the picking rollers has a support seat on its outer wall. The support seat contains a sliding bushing that is connected to the picking roller. The telescopic end of the hydraulic cylinder is connected to the support seat. The other picking roller has a fixed seat on its outer wall. The fixed seat is fixedly connected to the header frame. The cutter stand is equipped with a guide assembly for guiding the reciprocating motion of the support base; The header fixing frame is equipped with two picking plates in pairs, and a picking channel is provided between the two picking plates.

[0006] In some technical solutions of this utility model, a rubber pad is installed on the side wall of the ear-picking plate away from the ear-picking roller, and a number of protrusions are equidistantly arranged on the side wall of the rubber pad along its extension direction.

[0007] In some technical solutions of this utility model, both picking plates are detachably mounted on the top of the cutting platform fixing frame along the extension direction of the cutting platform fixing frame.

[0008] In some technical solutions of this utility model, the ear-picking roller includes a roller body, with a number of toothed straight tension ribs arranged around the side of the roller body near the cutter table fixing frame, and a spiral conical strip arranged on the side of the roller body away from the cutter table fixing frame.

[0009] In some technical solutions of this utility model, the guide assembly includes a bracket installed on the cutter table fixing frame, a guide rod installed on the bracket, an arc-shaped guide groove opened on the outer side wall of the support seat, and a portion of the guide rod is embedded in the guide groove.

[0010] In some technical solutions of this utility model, the transmission box includes two transmission shafts arranged in pairs on the header fixing frame, a transmission structure is provided between the two ear-picking rollers and connected to the two transmission shafts, gears are provided on both transmission shafts, the two gears mesh with each other, and a reducer is provided on the side of the header fixing frame away from the ear-picking rollers and connected to one of the transmission shafts.

[0011] In some technical solutions of this utility model, the transmission structure consists of two first universal joint connectors, which are respectively connected to two transmission shafts, and the sides of the two picking rollers near the header fixing frame are respectively connected to the two first universal joint connectors.

[0012] In some technical solutions of this utility model, the transmission structure includes a second universal joint connector, which is connected to the picking roller for mounting the support seat, and the picking roller for mounting the fixed seat is connected to its corresponding transmission shaft.

[0013] Compared with the prior art, this utility model has at least the following advantages or beneficial effects: This utility model adjusts the gap between the two ear-picking rollers in real time by hydraulic cylinder, which can avoid excessive squeezing of the ears due to the gap being too small. This is especially important for fresh corn with thin skin, lots of juice, and is easily damaged. The hydraulic stepless adjustment method allows the structure to quickly adapt to the harvesting needs of different varieties, different growth levels, and even different moisture contents of corn, improving the versatility of the machine and the stability of the operation quality. The guide component ensures that the movable ear-picking roller moves smoothly along the predetermined trajectory during the adjustment process, avoiding jamming or swaying, thereby ensuring the consistency of the ear-picking gap after adjustment and during the working process, making the force on the ear-picking process more uniform and the ear separation effect more reliable. Attached Figure Description

[0014] Figure 1This is a top view schematic diagram of the ear-picking structure in this utility model.

[0015] Figure 2 This is a side view of the installation structure of the ear-picking structure of this utility model.

[0016] Figure 3 This is a top view schematic diagram of the installation structure of the ear-picking roller and ear-picking plate of this utility model.

[0017] Figure 4 for Figure 3 A partially enlarged structural diagram of the central guide component.

[0018] Figure 5 for Figure 2 A magnified schematic diagram of the structure at point A in the middle.

[0019] Reference numerals: 1-Picking roller; 101-Support seat; 102-Roller body; 103-Toothed straight tension bar section; 104-Conical strip; 1011-Guide groove; 2-Fixed seat; 3-Cutting table fixing frame; 4-Hydraulic cylinder; 5-Transmission box; 501-Transmission shaft; 502-Transmission structure; 503-First universal joint connector; 504-Second universal joint connector; 505-Gear; 506-Reducer; 6-Guide assembly; 601-Bracket; 602-Guide rod; 7-Picking plate; 701-Picking channel; 8-Rubber pad; 801-Raised strip. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.

[0022] Example This utility model provides a tassel-picking structure for fresh corn, such as... Figures 1-5As shown, it includes two picking rollers 1 that are longitudinally inclined and placed on the same side of the header fixing frame 3; the two picking rollers 1 rotating in opposite directions form a pair of clamping and pulling mechanisms. They grab the corn stalks and pull them downwards, taking advantage of the weak point in the connection between the ear and the stalk, and the fact that the size of the ear is larger than the gap between the picking rollers 1, to achieve the separation of the ear from the stalk.

[0023] A hydraulic cylinder 4 is installed on the header fixing frame 3. One of the ear-picking rollers 1 has a support seat 101 sleeved on the outer wall. The support seat 101 has a sliding bushing connected to the ear-picking roller 1. The telescopic end of the hydraulic cylinder 4 is connected to the support seat 101. The other ear-picking roller 1 has a fixing seat 2 sleeved on the outer wall. The fixing seat 2 is fixedly connected to the header fixing frame 3. The header fixing frame 3 is equipped with a guide assembly 6 for guiding the reciprocating motion of the support seat 101. The support seat 101 is driven by a hydraulic cylinder 4, making one of the picking rollers 1 a movable roller. Combined with the constraint of the guide assembly 6, the picking roller 1 can change the gap with the fixed roller, achieving passive or active adjustment of its position to accommodate ears of different diameters. The goal is to ensure that both picking rollers 1 can grip the stem, while the gap between the picking plates 7 on top of them is too large for the ear to pass through. The picking plates 7 reduce the squeezing force on the ear, preventing damage caused by the stem slipping due to excessive gaps, resulting in incomplete picking and requiring secondary pulling. The longitudinally inclined picking roller 1 forms a downward-sloping working surface, facilitating the smooth pulling of the stem. It is then blocked by two paired picking plates 7 on the header fixing frame 3, with a picking channel 701 between the two picking plates 7 for the stem to pass through. Furthermore, the ear-picking channel 701 formed by the ear-picking plate 7 acts as a fixed rigid blocking surface, cooperating with the moving ear-picking roller 1 to form a "pull and block" ear-picking structure. The cutting table fixing frame 3 is equipped with a transmission box 5 on the side away from the ear-picking roller 1. The transmission box 5 is connected to the two ear-picking rollers 1 respectively; it is directly connected to the two ear-picking rollers 1, which is reasonable in layout, short in transmission chain, high in efficiency, and easy to maintain.

[0024] The process of collecting fresh sweet corn plants in this structure: Under the action of an external conveying or guiding device, fresh corn plants are fed into a picking channel 701 consisting of two picking plates 7. Two paired, longitudinally inclined picking rollers 1 rotate in opposite directions under the drive of a transmission box 5. The corn stalks are guided within the picking channel 701 to the gap between the two picking rollers 1, where they are gripped and pulled downwards by the picking rollers 1. To accommodate different varieties or growth conditions of corn ears, a hydraulic cylinder 4 is activated, its telescopic end pushing a support seat 101 to reciprocate along a path set by a guide assembly 6. Since the support seat 101 is connected to one picking roller 1 via a sliding bushing, this picking roller 1 can move relative to the other picking roller 1 mounted on a fixed base 2, thereby adjusting the working gap between the two picking rollers 1 in real time and flexibly. Under the pull of the picking rollers 1, the stalks move downwards, while larger fresh corn ears are blocked by the picking plates 7 above. Under the combined action of the stalk tension and the resistance of the picking plate 7, the ear of fruit is forcibly peeled (picked) from the stalk and collected through the picking channel 701.

[0025] In some technical solutions of this utility model, a rubber pad 8 is installed on the side wall of the ear-picking plate 7 away from the ear-picking roller 1. Several raised strips 801 are equidistantly arranged on the side wall of the rubber pad 8 along its extending direction. The cross-section of the raised strips 801 is circular, rectangular, triangular, or other irregular or regular cross-sections. During the process of the ears being picked and contacting and sliding down the inner side of the ear-picking plate 7, the rubber pad 8 and its raised strips 801 provide a buffer and resistance-increasing surface. The rubber raised strips 801 and the rubber pad 8 utilize elasticity to absorb the impact energy during ear collisions. The soft contact method effectively prevents fresh corn kernels from breaking due to hard collisions with the metal plate. Furthermore, the raised strip structure 801 can moderately increase friction, preventing the ears from bouncing randomly at high speed on the inclined surface, and also form a guiding channel, facilitating the orderly and stable sliding of the ears to the collection device, reducing the risk of accumulation and blockage at the ear-picking plate 7.

[0026] In some technical solutions of this utility model, both ear-picking plates 7 are detachably mounted on the top of the header fixing frame 3 along the extension direction of the header fixing frame 3. When it is necessary to replace or repair the ear-picking plates 7, or adjust the width of the ear-picking channel 701 according to the corn variety, disassembly can be performed, enabling quick replacement and shortening downtime for maintenance. Different specifications of ear-picking plates 7 can be replaced or the width of the ear-picking channel 701 between the two ear-picking plates 7 can be adjusted according to different agronomical requirements (such as varieties with particularly large or small ears), further expanding the machine's applicability.

[0027] In some technical solutions of this utility model, the picking roller 1 includes a roller body 102. Several toothed straight pull sections 103 are arranged around the side of the roller body 102 closest to the header fixing frame 3, while a spiral conical strip 104 is provided on the side of the roller body 102 furthest from the header fixing frame 3. During operation, the toothed straight pull sections 103 near the header fixing frame 3 primarily function to strongly grip and initially pull the stalks, effectively biting into and gripping smooth or slippery corn stalks to prevent slippage. The spiral conical strip 104 furthest from the header, while pulling, generates an axial pushing force on the stalks. The axial force generated by the spiral conical strip 104 causes the stalks to move slightly laterally or roll while moving downwards, helping to straighten tangled stalks and allow them to enter and pass through the two picking rollers 1 more smoothly, reducing blockages and stalk breakage, and improving operational smoothness.

[0028] In some technical solutions of this utility model, the guide assembly 6 includes a bracket 601 mounted on the header fixing frame 3. A guide rod 602 is mounted on the bracket 601. An arc-shaped guide groove 1011 is opened on the outer side wall of the support seat 101, and the guide rod 602 is partially embedded in the guide groove 1011. When the hydraulic cylinder 4 pushes the support seat 101 to move, the arc-shaped guide groove 1011 on the support seat 101 slides along the guide rod 602 fixed on the bracket 601. The cooperation between the guide rod 602 and the arc-shaped guide groove 1011 strictly restricts the movement of the support seat 101 (along with the movable ear-picking roller 1) to a defined path, so that the ear-picking roller 1 maintains a relatively parallel movement of the axis when adjusting the gap, rather than swinging randomly. This design can withstand the lateral force generated during operation, prevent the support seat 101 from twisting or shifting when under force, and ensure that the gap between the two ear-picking rollers 1 is uniform and consistent throughout the entire length, thereby ensuring stable ear-picking quality.

[0029] In some technical solutions of this utility model, the transmission box 5 includes two transmission shafts 501 arranged in pairs on the header fixing frame 3. A transmission structure 502 is provided between the two picking rollers 1 and is connected to the two transmission shafts 501. Each of the two transmission shafts 501 is provided with a gear 505, and the two gears 505 mesh with each other. A reducer 506 is provided on the side of the header fixing frame 3 away from the picking rollers 1 and is connected to one of the transmission shafts 501. External power is input to a transmission shaft 501 through the reducer 506. The power is transmitted synchronously and in opposite directions to the two transmission shafts 501 through the meshing pair of gears 505. Then, the transmission structure 502 drives the two picking rollers 1 to rotate in opposite directions. The use of two meshing gears 505 can strictly ensure that the rotation speed of the two picking rollers 1 is synchronized and the rotation direction is opposite, so as to realize the effective clamping and pulling of the stalks by the two picking rollers 1.

[0030] In some technical solutions of this utility model, Figure 3This demonstrates the installation method of the two first universal joint connectors 503. The transmission structure 502 consists of two first universal joint connectors 503, which are respectively connected to two drive shafts 501. The sides of the two picking rollers 1 closest to the header mounting bracket 3 are respectively connected to the two first universal joint connectors 503. When power is transmitted from the drive shaft 501 to the picking roller 1 through the first universal joint connectors 503, the universal joint connectors allow for a certain degree of angular and axial offset. This is particularly important when one picking roller 1 needs to move closer to or further away from the other. The universal joint connectors allow for effective power transmission even when the picking roller 1 moves with the support base 101 to adjust the clearance, avoiding the problems of stiffness, wear, or damage that may be caused by rigid connections. This also reduces the stringent requirements for alignment accuracy between the transmission components and the picking roller 1, facilitating assembly and maintenance.

[0031] In some technical solutions of this utility model, Figure 2 This demonstrates the lateral mounting method of the second universal joint connector 504. The transmission structure 502 includes the second universal joint connector 504, which connects to the picking roller 1 used to mount the support base 101. The picking roller 1 used to mount the fixed base 2 is connected to its corresponding drive shaft 501. The fixed picking roller 1 is directly connected to the drive shaft 501 via a rigid or conventional coupling; the movable picking roller 1 is connected to its corresponding drive shaft 501 via the second universal joint connector 504. Different designs are implemented for the different motion characteristics of the fixed and movable rollers. The fixed roller requires no displacement and can be simply connected; the movable roller requires displacement compensation and is equipped with a universal joint connector. This design, while ensuring the necessary flexibility of the movable roller, may simplify some parts of the structure, is more economical, and solves the problem of power transmission reliability during dynamic gap adjustment of the movable roller.

[0032] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A structure for picking ears of fresh corn, characterized by, Includes two picking rollers that are longitudinally inclined and placed on the same side of the header fixing frame; The cutting platform fixing frame is provided with a transmission box on the side opposite to the picking roller, and the transmission box is connected to the two picking rollers respectively. A hydraulic cylinder is installed on the header fixing frame. One of the ear-picking rollers has a support seat on its outer side wall. The support seat has a sliding bushing connected to the ear-picking roller. The telescopic end of the hydraulic cylinder is connected to the support seat. The other ear-picking roller has a fixing seat on its outer side wall. The fixing seat is fixedly connected to the header fixing frame. The cutting table fixing frame is provided with a guide component for guiding the reciprocating motion of the support base; The cutting platform fixing frame is equipped with two picking plates in pairs, and a picking channel is provided between the two picking plates.

2. A structure for picking ears of fresh corn according to claim 1, characterized in that, A rubber pad is installed on the side wall of the ear-picking plate away from the ear-picking roller, and a number of raised strips are provided at equal intervals along the extension direction of the side wall of the rubber pad.

3. A tassel-picking structure for fresh corn according to claim 1 or 2, characterized in that, Both picking plates are detachably mounted on top of the header fixing frame along the extension direction of the header fixing frame.

4. The ear-picking structure for fresh corn according to claim 1, characterized in that, The ear-picking roller includes a roller body, with a plurality of toothed straight tension ribs arranged around the side of the roller body near the cutting table fixing frame, and a spiral conical strip arranged on the side of the roller body away from the cutting table fixing frame.

5. A tassel-picking structure for fresh corn according to claim 1 or 4, characterized in that, The guiding assembly includes a bracket mounted on the cutting table frame, a guide rod mounted on the bracket, an arc-shaped guide groove on the outer side wall of the support base, and a portion of the guide rod being embedded in the guide groove.

6. The ear-picking structure for fresh corn according to claim 5, characterized in that, The transmission box includes two transmission shafts arranged in pairs on the header fixing frame. A transmission structure is provided between the two picking rollers and is connected to the two transmission shafts. Gears are provided on both transmission shafts and the two gears mesh with each other. A reducer is provided on the side of the header fixing frame away from the picking rollers and is connected to one of the transmission shafts.

7. The ear-picking structure for fresh corn according to claim 6, characterized in that, The transmission structure consists of two first universal joint connectors, which are respectively connected to two transmission shafts. The two picking rollers are respectively connected to the two first universal joint connectors on the side near the header fixing frame.

8. The ear-picking structure for fresh corn according to claim 6, characterized in that, The transmission structure includes a second universal joint connector, which is connected to the picking roller for mounting the support base, and the picking roller for mounting the fixed base is connected to its corresponding transmission shaft.

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