A low-loss high-efficiency folding stem type pineapple picker

Abstract

The application discloses a low-loss and high-efficiency stem-folding type pineapple harvesting device and belongs to the technical field of pineapple harvesting devices. The application solves the problem that the existing rotary feeding type pineapple picking device greatly disturbs fruit clusters and easily causes damage to fruits and offshoots. The device comprises a rack and a picking execution mechanism, a power transmission system, a slide rail assembly and a limiting collection mechanism, wherein the power transmission system, the slide rail assembly and the limiting collection mechanism are fixedly connected with the rack, a plurality of picking units are uniformly distributed along the circumference of the main frame, the main frame is a shaft roller-free frame structure, the power transmission system is located at one end of the main frame and provides rotary power for the main frame, the limiting collection mechanism is located inside the main frame, the bottom of the limiting collection mechanism is an arc surface structure and is used for limiting fruits in the picking units moving below the limiting collection mechanism, and the upper part of the limiting collection mechanism is an open structure and is used for collecting and guiding the falling fruits of the picking units above the limiting collection mechanism, so that the integrity and quality of the fruits are effectively protected and the damage risk is reduced. The physical burden of laborers is greatly reduced, and the working environment is improved.

Description

Technical Field

[0001] This invention relates to a low-damage, high-efficiency stem-breaking pineapple harvester, belonging to the technical field of pineapple harvesting equipment. Background Technology

[0002] Pineapples are widely loved by consumers for their rich nutrition and sweet taste. As demand continues to increase, the planting area has expanded accordingly, driving the rapid development of pineapple cultivation and related industries. However, the pineapple harvesting season is short, generally only about one and a half months, and the widespread planting area and relatively high yield present significant challenges and difficulties for harvesting. Currently, pineapple harvesting is mainly done manually, and labor costs during the entire harvesting period account for about 40% of the profits from pineapple production. Fruit farmers' desire to alleviate the pressure of pineapple harvesting through mechanization is becoming increasingly urgent.

[0003] Existing pineapple harvesting equipment, such as CN115735545A, describes a pineapple harvesting machine and equipment with a fruit-supporting device and a fruit-picking device. This harvesting machine includes a frame, a traveling mechanism mounted on the frame, a fruit-supporting device, a fruit-picking device, and a cutter. The fruit-supporting device straightens pineapple fruits in different positions, and then the rotating fruit-picking device moves the straightened pineapple stems into the cutter for cutting, enabling batch harvesting of pineapple fruits and improving harvesting efficiency. CN114731834A discloses a pineapple harvesting device that combines a wire roller and a rigid rod roller. This device includes multiple double-roller mechanisms, a mounting bracket, multiple angle adjustment mechanisms, a stalk cutter, and a fruit-supporting device. During operation, the pineapple plants are tilted backward by the rotating double-roller mechanism, entering the fruit-supporting device. Under the action of the fruit stalk cutter and rigid rod, the pineapple stalks are quickly separated from the plant and fall into the fruit collector, thus completing the harvesting of the pineapple fruit. Publication number CN113892342B describes a comb-tooth reel-type pineapple harvester, which includes a high-clearance fruit-collecting cart, a frame, a conveying device, a first motor, and a harvesting main body. During forward movement, the rotating reel feeds the pineapples sequentially. The pineapple plants are supported by the comb teeth, pushed by the reel, and pulled by the rootstock. Under the combined force, the fruit stalks break at the connection point, achieving fruit stalk separation and completing the fruit harvesting.

[0004] The aforementioned pineapple harvesting equipment all employ a rotating mechanism to feed the pineapple fruits, resulting in high work efficiency and representing a significant step forward in the mechanization of pineapple harvesting. However, during the sweeping motion of the rotary feeder through the pineapple bushes, the feeding mechanism, moving radially into the bushes with the rotating drum, is prone to colliding with the pineapple fruits and their offshoots. This can lead to fruit damage and accidental detachment of offshoots, negatively impacting the quality and efficiency of the harvesting operation. Summary of the Invention

[0005] The present invention addresses the problem that existing rotary feeding pineapple harvesting devices cause significant disturbance to the fruit cluster, easily leading to damage to the fruit and buds, and provides a low-damage, high-efficiency stem-breaking pineapple harvester.

[0006] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0007] A low-damage, high-efficiency stem-breaking pineapple harvester includes a frame and a harvesting mechanism. The harvesting mechanism comprises a power transmission system, a main frame, a slide rail assembly, a limiting and collecting mechanism, and several harvesting units. The power transmission system, the slide rail assembly, and the limiting and collecting mechanism are all fixedly connected to the frame. The harvesting units are evenly distributed circumferentially along the main frame. The main frame is a shaftless roller frame structure. The power transmission system is located at one end of the main frame and provides rotational power. The limiting and collecting mechanism is located inside the main frame. The bottom of the limiting and collecting mechanism has an arc-shaped structure to limit the fruit in the harvesting units below it. The upper part of the limiting and collecting mechanism has an open structure to collect and discharge fruit falling from the harvesting units above it.

[0008] The harvesting unit includes rollers, a baffle component, a base plate component, two support plates, and two limiting slide plates. The baffle component and the base plate component are fixedly mounted on the main frame parallel to the main frame axis. The two limiting slide plates are arranged parallel to each other and correspondingly on opposite sides of the two support plates. One end of each limiting slide plate is rotatably connected to the support plate on the same side. A slide rail is provided on the limiting slide plate. The base plate component is fixed between the two limiting slide plates. The rollers are mounted on one support plate. One end of the baffle component in the width direction is installed between the two support plates and its rotation is controlled by the rollers. The other end in the width direction is slidably installed in the slide rails of the two limiting slide plates.

[0009] The slide rail assembly includes an inner slide rail and an outer slide rail. The arc-shaped outer surface of the inner slide rail and the arc-shaped inner surface of the outer slide rail are staggered along the rotation direction of the main frame. The arc-shaped outer surface of the inner slide rail and the arc-shaped inner surface of the outer slide rail provide rotational friction for the rollers that cooperate with them.

[0010] Furthermore, the picking unit also includes a push plate component and a lever component, wherein the baffle component and the push plate component are fixedly connected by bolts, and the lever component includes a lever shaft and a lever adjusting wheel. The lever shaft is located on one side of the width direction of the base plate component and is rotatably mounted between two limiting slide plates. The lever adjusting wheel is rotatably mounted on a support plate and arranged on the same side as the roller. The lever adjusting wheel is coaxially fixedly connected to the lever shaft. During the feeding and picking of the pineapple, the lever adjusting wheel contacts the arc-shaped outer surface of the outer slide rail.

[0011] Furthermore, the arc length of the outer curved surface of the inner slide rail is equal to that of the arc length of the inner curved surface of the outer slide rail.

[0012] Furthermore, the lever shaft is covered with a silicone sleeve with a plum blossom-shaped cross section, and the push plate component includes a push plate body and a connecting frame. The push plate body is fixedly connected to the baffle component through the connecting frame, and the push plate body is a silicone plate.

[0013] Furthermore, the limiting and collecting mechanism includes an arc-shaped limiting plate, a shock-absorbing slide plate, and a slide plate bracket. The top of the arc-shaped limiting plate is an open end. The shock-absorbing slide plate is obliquely fixed to the arc-shaped limiting plate through the slide plate bracket. The arc-shaped limiting plate is fixed to the frame through the slide plate bracket. The lower end of the shock-absorbing slide plate faces the side of the main frame away from the power transmission system and extends out of the main frame.

[0014] Furthermore, the frame includes a suspension frame, a support beam, a support frame, and a hydraulic cylinder, wherein the suspension frame is fixedly mounted on the rear side of the support beam, the support frame is rotatably mounted on the front side of the support beam, the hydraulic cylinder is inclinedly mounted between the support beam and the support frame, and the power transmission system, the slide rail assembly, and the limiting collection mechanism are all fixedly connected to the support frame.

[0015] Furthermore, the power transmission system includes a drive body and a chain drive assembly. The drive body is fixed on the frame, and the drive body drives the main frame to rotate through the chain drive assembly.

[0016] Furthermore, the main frame includes a first frame body and a second frame body arranged coaxially and both having a closed-loop structure. Several picking units are arranged between the first frame body and the second frame body. A hub is coaxially fixed at the center of the first frame body through several support rods, and the support rods are radially distributed outward from the hub. The hub is rotatably connected to the frame, and the limiting collection mechanism passes through the second frame body and is fixed to the frame.

[0017] Furthermore, the baffle component includes a baffle frame and a baffle grid surface laid on the baffle frame, wherein the baffle frame is a rectangular frame structure.

[0018] Furthermore, the base plate component includes a base plate frame and a base plate grid surface laid on the base plate frame.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] This invention discloses a low-loss, high-efficiency stem-breaking pineapple harvester. Its highly integrated design seamlessly combines four key stages: low-loss feeding, precise harvesting, automatic lifting, and unified collection, forming a unified and efficient operational process. This innovation not only significantly improves harvesting efficiency and reduces fruit processing time, but also effectively protects the integrity and quality of the fruit, reducing the risk of damage. Simultaneously, this low-loss, high-efficiency stem-breaking pineapple harvester greatly reduces the physical burden on workers and improves the working environment.

[0021] This invention discloses a low-damage, high-efficiency stem-breaking pineapple harvester with strong adaptability. It can flexibly adjust operating parameters according to varying planting patterns in orchards, such as different row spacing, plant spacing, and fruit height above the ground. By precisely controlling the height above the ground to adapt to terrain changes, optimizing the rotation speed to match fruit cluster density, and increasing or decreasing the number of harvesting units to meet the needs of large-scale production, this harvester ensures efficient and stable operation even in large-scale orchard environments.

[0022] This invention discloses a low-damage, high-efficiency stem-breaking pineapple harvester. During operation, the harvesting unit can structurally transform according to the specific needs of different work sections, realizing the transformation from traditional radial sweeping harvesting to axial cutting harvesting. This perfectly matches key operational aspects such as precise axial cutting into the pineapple cluster, biomimetic stem-breaking harvesting, and efficient autonomous lifting. By reducing unnecessary mechanical contact, this design significantly reduces the potential risk of damage to the fruit and buds during harvesting, and avoids the physical impact that may be caused by rotary sweeping harvesting.

[0023] This invention discloses a low-damage, high-efficiency stem-breaking pineapple harvester. The structural conversion mechanism of the harvesting unit cleverly utilizes the friction generated between the rollers and the slide rail, eliminating the need for an external power source. This achieves energy conservation and environmental protection while simplifying operation. Through carefully designed slide rail installation positions and tilt angles, this mechanism ensures that the harvesting unit can precisely and smoothly convert its structure when needed. This adaptive adjustment capability allows the harvesting unit to seamlessly connect to each stage of the pineapple harvesting process, excellently completing designated tasks whether it's precise positioning, stable picking, or efficient lifting and collection.

[0024] This invention discloses a low-damage, high-efficiency stem-breaking pineapple harvester. As pineapple fruits ripen, the connection between the fruit stem and the stem becomes mechanically vulnerable due to the accumulation of abscisic acid, providing a natural entry point for harvesting. The bottom beam of the harvesting unit acts on this vulnerable connection between the fruit and stem, achieving a stem-breaking harvesting action as precise and efficient as manual labor. This design not only accurately separates the fruit from the stem, ensuring high efficiency in the harvesting process, but also simulates the gentle touch of manual harvesting to the greatest extent possible, effectively avoiding fruit damage that may occur with traditional harvesting methods. Attached Figure Description

[0025] Figure 1 This is a first three-dimensional structural schematic diagram of the low-damage and high-efficiency stem-breaking pineapple harvester of the present invention;

[0026] Figure 2 This is a second three-dimensional structural schematic diagram of the low-damage and high-efficiency stem-breaking pineapple harvester of the present invention;

[0027] Figure 3 This is a first three-dimensional structural diagram of the harvesting actuator in the low-damage and high-efficiency stem-breaking pineapple harvester of the present invention;

[0028] Figure 4 This is a schematic diagram of the second three-dimensional structure of the harvesting actuator in the low-damage and high-efficiency stem-breaking pineapple harvester of the present invention.

[0029] Figure 5 This is a three-dimensional structural diagram of the main frame in the low-damage and high-efficiency stem-breaking pineapple harvester of the present invention;

[0030] Figure 6 This is a three-dimensional structural diagram of the power transmission system in the low-loss and high-efficiency stem-breaking pineapple harvester of the present invention;

[0031] Figure 7 This is a three-dimensional structural diagram of the limiting collection mechanism in the low-damage and high-efficiency stem-breaking pineapple harvester of the present invention;

[0032] Figure 8 This is a three-dimensional structural diagram of the slide rail assembly in the low-damage, high-efficiency stem-breaking pineapple harvester of the present invention;

[0033] Figure 9 This is a schematic diagram of the first three-dimensional structure of the harvesting unit in the open state of the low-damage and high-efficiency stem-breaking pineapple harvester of the present invention.

[0034] Figure 10 This is a schematic diagram of the second three-dimensional structure of the low-damage and high-efficiency stem-breaking pineapple harvester of the present invention in the open state of the harvesting unit;

[0035] Figure 11This is a schematic diagram of the first three-dimensional structure of the harvesting unit in the closed state of the low-damage and high-efficiency stem-breaking pineapple harvester of the present invention;

[0036] Figure 12 This is a schematic diagram of the second three-dimensional structure of the harvesting unit in the closed state of the low-damage and high-efficiency stem-breaking pineapple harvester of the present invention;

[0037] Figure 13 This is a schematic diagram of the cooperation structure between the picking unit and the slide rail assembly in the low-damage and high-efficiency stem-breaking pineapple harvester of the present invention.

[0038] Figure 14 This is a schematic diagram of the first three-dimensional structure of the frame in the low-damage and high-efficiency stem-breaking pineapple harvester of the present invention.

[0039] Figure 15 This is a schematic diagram of the second three-dimensional structure of the frame in the low-damage and high-efficiency stem-breaking pineapple harvester of the present invention.

[0040] Figure 16 This is a schematic diagram showing the functional division of the harvesting unit in the low-damage, high-efficiency stem-breaking pineapple harvester of the present invention throughout a whole working cycle.

[0041] In the picture:

[0042] 1. Frame; 1-1. Suspension frame; 1-2. Support beam; 1-3. Hydraulic cylinder; 1-4. Support frame;

[0043] 2. Harvesting execution mechanism; 2-1. Power transmission system; 2-11. Drive body; 2-12. Chain drive assembly; 2-2. Main frame; 2-21. First frame body; 2-22. Second frame body; 2-23. Support rod; 2-24. Wheel hub; 2-31. Inner slide rail; 2-32. Outer slide rail; 2-33. Slide rail bracket; 2-4. Rolling limit collection mechanism; 2-41. Arc-shaped limit plate; 2-42. Shock-absorbing slide plate; 2-43. Slide plate bracket; 2-5. Harvesting sheet Yuan; 2-51, Roller; 2-52, Baffle component; 2-521, Baffle frame; 2-522, Baffle mesh surface; 2-53, Base plate component; 2-531, Base plate frame; 2-532, Base plate mesh surface; 2-54, Support plate; 2-55, Limiting slide plate; 2-56, Push plate component; 2-561, Push plate body; 2-562, Hanging ear; 2-563, Push plate crossbeam; 2-57, Toggle component; 2-571, Toggle adjustment wheel; 2-572, Silicone sleeve. Detailed Implementation

[0044] Specific implementation method one: Combining Figures 1 to 16This description of embodiments provides a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] It should be noted that the descriptions of "front," "rear," "left," "right," "inner," "outer," "left side," "right side," "upper part," "lower part," "top," and "bottom" in this invention are defined based on the orientation or positional relationships shown in the accompanying drawings. They are merely for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the described structure must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0046] In the description of this invention, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0047] A low-damage, high-efficiency stem-breaking pineapple harvester includes a frame 1 and a harvesting mechanism 2. The harvesting mechanism 2 includes a power transmission system 2-1, a main frame 2-2, a slide rail assembly, a limiting and collecting mechanism 2-4, and several harvesting units 2-5. The power transmission system 2-1, the slide rail assembly, and the limiting and collecting mechanism 2-4 are all fixedly connected to the frame 1. The harvesting units 2-5 are evenly distributed circumferentially along the main frame 2-2. The main frame 2-2 is a shaftless roller frame structure. The power transmission system 2-1 is located at one end of the main frame 2-2 and provides rotational power to the main frame 2-2. The limiting and collecting mechanism 2-4 is located inside the main frame 2-2. The bottom of the limiting and collecting mechanism 2-4 has an arc-shaped structure to limit the fruit moving into the harvesting unit 2-5 below it. The upper part of the limiting and collecting mechanism 2-4 has an open structure to collect and discharge fruit falling from the harvesting unit 2-5 above it.

[0048] The harvesting unit 2-5 includes a roller 2-51, a baffle component 2-52, a base plate component 2-53, two support plates 2-54, and two limiting slide plates 2-55. The baffle component 2-52 and the base plate component 2-53 are fixedly mounted on the main frame 2-2 parallel to its axial direction. The two limiting slide plates 2-55 are arranged parallel to each other and correspondingly on opposite sides of the two support plates 2-54. One end of each limiting slide plate 2-55 is rotatably connected to the support plate 2-54 on the same side. A slide rail is provided on the limiting slide plate 2-55. The base plate component 2-53 is fixed between the two limiting slide plates 2-55. The roller 2-51 is mounted on one support plate 2-54. One end of the baffle component 2-52 in the width direction is mounted between the two support plates 2-54 and its rotation is controlled by the roller 2-51. The other end in the width direction is slidably mounted in the slide rail of the two limiting slide plates 2-55.

[0049] The slide rail assembly includes an inner slide rail 2-31 and an outer slide rail 2-32. The arc-shaped outer surface of the inner slide rail 2-31 and the arc-shaped inner surface of the outer slide rail 2-32 are staggered along the rotation direction of the main frame 2-2. The arc-shaped outer surface of the inner slide rail 2-31 and the arc-shaped inner surface of the outer slide rail 2-32 provide rotational friction for the roller 2-51 that cooperates with them.

[0050] The main frame 2-2 can be a circular roller frame, a polygonal roller frame, etc., as long as it can achieve circumferential rotation and the installation of several picking units 2-5.

[0051] The frame 1 serves as the core load-bearing and connecting mechanism, used to mount the harvesting actuator 2 onto the traveling power vehicle.

[0052] The harvesting mechanism 2 integrates multiple functions such as fruit feeding, harvesting, lifting, and fruit collection, and is the core working component of the harvester.

[0053] The power transmission system 2-1 is used to provide working power to the harvesting actuator 2, specifically controlling the main frame 2-2 along... Figure 1 It rotates counterclockwise as shown.

[0054] The main frame 2-2 is the supporting structure of the picking execution mechanism 2, which is used to drive the movement of each picking unit 2-5.

[0055] Harvesting units 2-5 are the core working components of the harvesting actuator 2, used to perform the harvesting action. Preferably, the number of harvesting units 2-5 in this invention is eight.

[0056] The slide rail is a key component ensuring the effective operation of the harvesting unit 2-5. Both the inner slide rail 2-31 and the outer slide rail 2-32 are fixed to the frame 1 via slide rail brackets 2-33. The inner slide rail 2-31 and slide rail brackets 2-33, as well as the outer slide rail 2-32 and slide rail brackets 2-33, are bolted together for easy position adjustment and disassembly. The slide rail brackets 2-33 are welded to the frame 1. The inner slide rail 2-31 is shorter than the outer slide rail 2-32, and its outer surface is a curved surface that contacts the roller 2-51 when it moves to its position. The outer slide rail 2-32 is longer than the inner slide rail 2-31, and its lower third is a curved surface that contacts the roller 2-51. The installation positions of the inner slide rail 2-31 and the outer slide rail 2-32 should ensure that the outer side of the inner slide rail 2-31 and the arc-shaped inner side of the outer slide rail 2-32 are tangent to the roller 2-51.

[0057] The arc-shaped outer surface of the inner slide rail 2-31 and the arc-shaped inner surface of the outer slide rail 2-32 are located at two different positions in the rotation direction of the main frame 2-2, respectively, to realize the I-shaped closed state and the L-shaped open state of the baffle component 2-52 and the bottom plate component 2-53 in the picking unit 2-5. The movement of one of the picking units 2-5 is shown below as an example:

[0058] Before the roller 2-51 contacts the outer side of the inner slide rail 2-31, the baffle component 2-52 and the bottom plate component 2-53 in the picking unit 2-5 are in an L-shaped open state.

[0059] After roller 2-51 contacts the outer surface of inner slide rail 2-31, it performs... Figure 1 The baffle component 2-52 rotates counterclockwise, causing one end of the baffle component 2-52 connected to it to rotate together in the width direction, thereby causing the entire baffle component 2-52 to rotate. The other end of the baffle component 2-52 slides along the slide rail of the limiting slide plate 2-55, causing one end of the limiting slide plate 2-55 to rotate, thereby causing the bottom plate component 2-53 to rotate. When the roller 2-51 disengages from the arc-shaped outer side of the inner slide rail 2-31, the limiting slide plate 2-55 rotates to the limit position. At this time, the baffle component 2-52 and the bottom plate component 2-53 form an I-shaped closed state.

[0060] After roller 2-51 contacts the inner side of outer slide rail 2-32, it performs... Figure 1As shown, rotating clockwise causes one end of the baffle component 2-52 connected to it to rotate together in the width direction, thereby causing the entire baffle component 2-52 to rotate. The other end of the baffle component 2-52 in the width direction slides along the slide rail of the limiting slide plate 2-55, causing one end of the limiting slide plate 2-55 to rotate, thereby causing the bottom plate component 2-53 to rotate. When the roller 2-51 disengages from the arc-shaped inner side of the outer slide rail 2-32, the limiting slide plate 2-55 rotates to its limit position. At this time, the baffle component 2-52 and the bottom plate component 2-53 form an L-shaped open state.

[0061] The limiting collection mechanism 2-4 is used to limit the lateral displacement of the pineapple top and to sequentially transport the harvested pineapple fruits out of the harvesting execution mechanism 2.

[0062] This invention discloses a low-damage, high-efficiency stem-breaking pineapple harvester. The device ingeniously integrates multiple functions, including precise axial cutting, low-damage rotary feeding, biomimetic stem-breaking harvesting, and efficient continuous lifting. It comprehensively optimizes every step from continuous feeding and precise harvesting to stable delivery, ensuring low damage rates to the pineapple and its offspring throughout the harvesting process. Simultaneously, it meets the dual demands of modern agriculture for efficient operation and meticulous management. This invention effectively reduces the potential damage to pineapple fruits and their offspring during harvesting, and significantly improves harvesting efficiency and quality, providing strong technical support for the sustainable development of pineapple cultivation. Specifically:

[0063] This invention discloses a low-loss, high-efficiency stem-breaking pineapple harvester. Its highly integrated design seamlessly combines four key stages: low-loss feeding, precise harvesting, automatic lifting, and unified collection, forming a unified and efficient operational process. This innovation not only significantly improves harvesting efficiency and reduces fruit processing time, but also effectively protects the integrity and quality of the fruit, reducing the risk of damage. Simultaneously, this low-loss, high-efficiency stem-breaking pineapple harvester greatly reduces the physical burden on workers and improves the working environment.

[0064] This invention discloses a low-damage, high-efficiency stem-breaking pineapple harvester with strong adaptability. It can flexibly adjust operating parameters according to varying planting patterns in orchards, such as different row spacing, plant spacing, and fruit height above the ground. By precisely controlling the height above the ground to adapt to terrain changes, optimizing the rotation speed to match fruit cluster density, and increasing or decreasing the number of harvesting units by 2-5 to meet the needs of large-scale production, this harvester ensures efficient and stable operation even in large-scale orchard environments.

[0065] This invention discloses a low-damage, high-efficiency stem-breaking pineapple harvester. During operation, the harvesting units 2-5 can structurally transform according to the specific needs of different work sections, realizing the transformation from traditional radial sweeping harvesting to axial cutting harvesting. This perfectly matches key operational aspects such as precise axial cutting into the pineapple cluster, biomimetic stem-breaking harvesting, and efficient autonomous lifting. By reducing unnecessary mechanical contact, this design significantly reduces the potential risk of damage to the fruit and buds during harvesting, and avoids the physical impact that may be caused by rotary sweeping harvesting.

[0066] This invention discloses a low-damage, high-efficiency stem-breaking pineapple harvester. The structural conversion mechanism of the harvesting unit 2-5 cleverly utilizes the friction generated between the roller 2-51 and the slide rail, eliminating the need for an additional power source. This achieves energy conservation and environmental protection while simplifying operation. Through carefully designed slide rail installation positions and tilt angles, this mechanism ensures that the harvesting unit 2-5 can precisely and smoothly convert its structure when needed. This adaptive adjustment capability allows the harvesting unit 2-5 to seamlessly connect to each stage of the pineapple harvesting process, excellently completing designated tasks whether it's precise positioning, stable picking, or efficient lifting and collection.

[0067] This invention discloses a low-damage, high-efficiency stem-breaking pineapple harvester. As the pineapple ripens, the connection between the fruit stem and the stem becomes mechanically vulnerable due to the accumulation of abscisic acid, providing a natural entry point for harvesting. The bottom beam of the harvesting unit 2-5 acts on this vulnerable connection between the fruit and stem, achieving a stem-breaking harvesting action as precise and efficient as manual labor. This design not only accurately separates the fruit from the stem, ensuring high efficiency in the harvesting process, but also simulates the gentle touch of manual harvesting to the greatest extent possible, effectively avoiding fruit damage that may occur with traditional harvesting methods.

[0068] The picking unit 2-5 also includes a push plate component 2-56 and a lever component 2-57. The baffle component 2-52 is fixedly connected to the push plate component 2-56 by bolts. The lever component 2-57 includes a lever shaft and a lever adjusting wheel 2-571. The lever shaft is located on one side of the width direction of the base plate component 2-53 and is rotatably mounted between two limiting slide plates 2-55. The lever adjusting wheel 2-571 is rotatably mounted on a support plate 2-54 and arranged on the same side as the roller 2-51. The lever adjusting wheel 2-571 is coaxially fixedly connected to the lever shaft. During the feeding and picking of pineapples, the lever adjusting wheel 2-571 contacts the arc-shaped outer surface of the outer slide rail 2-32. In this design, the baffle component 2-52 and the push plate component 2-56 are bolted together to form a whole, and the base plate component 2-53 and the lever component 2-57 are connected together by the limiting slide plate 2-55. These two parts are further connected by a triangular support plate 2-54. The picking unit 2-5 is bolted to the main frame 2-2 through the bolt holes on the support plate 2-54. The push plate component 2-56 moves along the extension plane of the baffle component 2-52, pushing back any pineapple fruits that might come into direct contact with the picking unit 2-5, thus preventing direct collisions. When the lever adjusting wheel 2-571 contacts the arc-shaped outer surface of the outer pulley, it drives the lever shaft... Figure 1 The counter-clockwise rotation shown will also push the contacting pineapple fruit back to before the harvesting unit 2-5, thus providing double protection for the pineapple fruit in the feeding area. The lever shaft and the lever adjusting wheel 2-571 are connected by a key, and the lever shaft is connected to the limiting slide plate 2-55 and the support plate 2-54 by a bushing connection. The outer surface of the outer slide rail 2-32 is entirely a curved surface that contacts the lever adjusting wheel 2-571.

[0069] The arc length of the outer curved surface of the inner slide rail 2-31 is equal to that of the arc length of the inner curved surface of the outer slide rail 2-32. The arc of rotation of the roller 2-51 in the picking zone is the same as that in the feeding zone.

[0070] The lever shaft is externally covered by a silicone sleeve 2-572 with a plum blossom-shaped cross-section. The push plate component 2-56 includes a push plate body 2-561 and a connecting frame. The push plate body 2-561 is fixedly connected to the baffle component 2-52 through the connecting frame. The push plate body 2-561 is a silicone plate. In this design, the silicone sleeve 2-572 is a mixed bushing made of silicone material with a plum blossom-shaped cross-section. Its length is the same as the width of the baffle mesh surface 2-522 in the baffle component 2-52. The silicone sleeve 2-572 wraps around the lever shaft, and the push plate body 2-561, being a silicone plate, further protects the pineapple fruit, effectively preventing damage. The connecting frame includes a pair of hanging ears 2-562 and a push plate crossbeam 2-563 fixed between the pair of hanging ears 2-562. The silicone plate is fixedly mounted on the push plate crossbeam 2-563. By adjusting the installation position, it is ensured that the silicone plate and the baffle mesh surface 2-522 are always coplanar, and the push plate component 2-56 and the baffle component 2-52 are assembled into a whole, with no relative displacement during the movement.

[0071] The limiting and collecting mechanism 2-4 includes an arc-shaped limiting plate 2-41, a shock-absorbing slide plate 2-42, and a slide plate bracket 2-43. The top of the arc-shaped limiting plate 2-41 is an open end. The shock-absorbing slide plate 2-42 is obliquely fixed on the arc-shaped limiting plate 2-41 through the slide plate bracket 2-43. The arc-shaped limiting plate 2-41 is fixed to the frame 1 through the slide plate bracket 2-43. The lower end of the shock-absorbing slide plate 2-42 faces the side of the main frame 2-2 away from the power transmission system 2-1 and extends out of the main frame 2-2. With this design, the overall structure of the limiting and collecting mechanism 2-4 resembles a horizontally placed, obliquely cut hollow cylinder. Its arc-shaped limiting plate 2-41 is concentric with the main frame 2-2, so as to keep the fruit in the picking unit 2-5 below the arc-shaped limiting plate 2-41 in place during the rotation of the main frame, preventing the fruit from falling. The top of the arc-shaped limiting plate 2-41 is open, so that the pineapple fruit can fall onto the shock-absorbing slide plate 2-42. The shock-absorbing slide plate 2-42 is preferably a silicone slide plate.

[0072] The frame 1 includes a suspension frame 1-1, a support beam 1-2, a support frame 1-4, and a hydraulic cylinder 1-3. The suspension frame 1-1 is fixedly mounted on the rear side of the support beam 1-2, and the support frame 1-4 is rotatably mounted on the front side of the support beam 1-2. The hydraulic cylinder 1-3 is inclinedly mounted between the support beam 1-2 and the support frame 1-4. The power transmission system 2-1, the slide rail assembly, and the limiting and collecting mechanism 2-4 are all fixedly connected to the support frame 1-4. With the machine's forward direction as a reference, the suspension frame 1-1 is located on the rear side of the support beam 1-2, and the support frame 1-4 is located on the front side of the support beam 1-2. The suspension frame 1-1 serves as the connection mechanism between the frame 1 and the traveling power implement. It is fixedly connected to the support beam 1-2 via a U-shaped clip, ensuring a stable connection and facilitating installation and disassembly. It also facilitates the alignment and adjustment of the picking actuator 2 and the traveling power implement. Two suspension frames 1-1 can be used for a more stable connection. The support beam 1-2, serving as the main load-bearing component of the frame 1, is connected to the suspension frame 1-1 via a U-shaped clip. Its bottom is hinged to the support frame 1-4, forming a stable triangular support structure via hydraulic cylinders 1-3. This allows the support frame 1-4 to be flexibly adjusted in angle according to operational needs, thereby achieving precise control over the ground clearance of the harvesting actuator 2 and giving the frame 1 greater adaptability and flexibility. The entire frame 1 is connected to the counterweight support frame 1-4 or the front axle bracket at the front of the traveling power implement via the suspension frame 1-1, achieving integrated operation of the pineapple harvester and the traveling power implement. The ground clearance and angle of the harvesting actuator 2 can be adjusted according to the actual growth of the pineapples in the field and diverse operational needs, ensuring operational efficiency and accuracy. This design not only simplifies the installation process but also ensures smooth and stable harvesting operations, improving overall operational efficiency and safety. There are two support frames 1-4, arranged parallel to each other on both sides of the harvesting actuator 2, and correspondingly, there are also two hydraulic cylinders 1-3.

[0073] The power transmission system 2-1 includes a drive body 2-11 and a chain drive assembly 2-12. The drive body 2-11 is fixedly mounted on the frame 1, and drives the main frame 2-2 to rotate via the chain drive assembly 2-12. In this design, the drive body 2-11 can be a hydraulic pump, which is fixedly mounted on the frame 1 via a support. The hydraulic pump and the support are bolted together, and the support is welded to the frame 1. The driving sprocket in the chain drive assembly 2-12 is connected to the hydraulic pump output via a key connection, and the driven sprocket is connected to the hub 2-24 of the main frame 2-2 via a key connection.

[0074] The main frame 2-2 includes a first frame body 2-21 and a second frame body 2-22, both coaxially arranged and closed-loop structures. Several harvesting units 2-5 are disposed between the first frame body 2-21 and the second frame body 2-22. A hub 2-24 is coaxially fixed to the center of the first frame body 2-21 via several support rods 2-23, with the support rods 2-23 radiating outwards from the hub 2-24. The hub 2-24 is rotatably connected to the frame 1. A limiting collection mechanism 2-4 passes through the second frame body 2-22 and is fixedly connected to the frame 1. In this design, the hub 2-24 is rotatably connected to one support frame 1-4 in the frame 1 via a connecting shaft and bearings. The lower end of the limiting collection mechanism 2-4 faces the second frame body 2-22 and is fixedly connected to the other support frame 1-4 in the frame 1. The second frame body 2-22 is a closed-loop structure and does not have a hub 2-24 or other structures, which facilitates the discharge of harvested pineapple fruits from the harvesting execution mechanism 2 via the limiting collection mechanism 2-4. The first frame body 2-21 is equipped with a hub 2-24 and radially distributed support rods 2-23, which serve a similar function as wheel spokes in terms of support, fixation, and load transmission. The central axis of the hub 2-24 is connected to the driven sprocket of the power transmission system 2-1 via a spline. During operation, the power transmission system 2-1 transmits working power to the harvesting execution mechanism 2, thereby driving the harvesting execution mechanism 2 to rotate.

[0075] Both the first frame body 2-21 and the second frame body 2-22 are preferably octagonal frame structures, with eight picking units 2-5 installed accordingly. The octagonal frame structure is formed by welding eight connecting rods of equal length end to end. The picking units 2-5 are fixed to the octagonal frame structure by bolt connection.

[0076] The baffle component 2-52 includes a baffle frame 2-521 and a baffle grid surface 2-522 laid on the baffle frame 2-521. The baffle frame 2-521 is a rectangular frame structure.

[0077] The base plate component 2-53 includes a base plate frame 2-531 and a base plate grid surface 2-532 laid on the base plate frame 2-531.

[0078] Working principle:

[0079] The low-damage and high-efficiency stem-breaking pineapple harvester of this invention needs to work in conjunction with a motorized vehicle such as a tractor or a high-clearance self-propelled chassis. The low-damage and high-efficiency stem-breaking pineapple harvester is attached to the front suspension point at the front end of the motorized vehicle, ensuring that it can move stably and flexibly with the motorized vehicle in complex and ever-changing field environments, thereby achieving efficient and precise pineapple harvesting operations.

[0080] Before operation, observe the overall stability of the machine's center of gravity to prevent tipping or lodging during field travel. Connect the hydraulic system of the traveling implement to the hydraulic pump of the low-loss, high-efficiency stem-breaking pineapple harvester, drive the hydraulic pump, and check the stability of power output and transmission. Check the smoothness of the lifting process of hydraulic cylinders 1-3 and support beam 1-2. Before harvesting, adjust the travel path of the traveling implement to ensure that the front-end harvester corresponds to the pineapple planting row, achieving accurate feeding and harvesting of the pineapple fruits. Adjust the rotational speed of the harvesting actuator 2 through the power transmission system 2-1 to keep its linear speed relatively consistent with the tractor's travel speed, ensuring smooth pineapple feeding and harvesting, avoiding blockages or misalignment, and thus ensuring the smooth progress of the harvesting work. This completes the preparatory work for the low-loss, high-efficiency stem-breaking pineapple harvester.

[0081] Working principle of power transmission system 2-1:

[0082] The hydraulic pump is connected to the hydraulic system of the traveling power implement to drive the drive sprocket. The drive sprocket drives the driven sprocket connected to the hub 2-24 via chain drive, thereby driving the harvesting actuator 2 to operate continuously. The power transmission system 2-1 has high torque to ensure the stress required for pineapple harvesting.

[0083] Breakdown of the main structure and working process of harvesting execution mechanism 2:

[0084] Under normal operating conditions, the harvesting actuator 2 rotates in the forward direction. The main frame 2-2 drives eight harvesting units 2-5, which are evenly distributed at equal angles, to rotate at a constant speed around the central axis of the main frame 2-2, while the inner slide rail 2-31 and outer slide rail 2-32, which are fixed on the frame 1, remain stationary.

[0085] To facilitate understanding of the working process of the harvesting execution mechanism 2, the entire working cycle of the harvesting execution mechanism 2 is divided according to function, taking the running trajectory of a random harvesting unit 2-5 as an example:

[0086] Starting from the contact point between the roller 2-51 of the picking unit 2-5 and the inner slide rail 2-31, and ending at the contact point between the roller 2-51 and the inner side of the outer slide rail 2-32, this interval is the feeding interval of the picking actuator 2.

[0087] Starting from the end of the feeding interval and ending at the lowest point of the arc-shaped limiting plate 2-41 of the limiting collection mechanism 2-4, this interval is the picking interval of the picking execution mechanism 2.

[0088] Starting from the end of the picking interval and ending at the end of the arc-shaped limiting plate 2-41 of the limiting collection mechanism 2-4, this interval is the lifting interval of the picking execution mechanism 2.

[0089] Starting from the end of the lifting interval and ending from the beginning of the feeding interval, this interval is the fruit drop interval of the harvesting execution mechanism 2.

[0090] All harvesting units 2-5 of harvesting execution agency 2 carry out pineapple feeding, harvesting, lifting and collection work in this order in a cyclical manner.

[0091] Working process and principle of the feeding zone:

[0092] Starting with the feeding section, the working principle of the harvesting execution mechanism 2 will be explained.

[0093] When the harvesting unit 2-5 moves with the main frame 2-2 to the feeding section, the roller 2-51 runs between the outer slide rail 2-32 and the inner slide rail 2-31. The roller 2-51 is tangent to the inner side of the outer slide rail 2-32 and the outer side of the inner slide rail 2-31. Since the first two-thirds section of the outer slide rail 2-32 has no solid inner side, the roller 2-51 only contacts the outer side of the inner slide rail 2-31. Under the action of the rolling friction generated by the contact, the roller 2-51 begins to rotate, which in turn drives the baffle component 2-52 to rotate in the opposite direction, and the angle between the baffle component 2-52 and the bottom plate component 2-53 gradually increases. In addition, during this process, the push plate component 2-56 also moves in the direction of the extended plane of the baffle component 2-52, forming a back-pushing action opposite to the forward direction of the machine. Until the roller 2-51, driven by the main frame 2-2, disengages from the inner slide rail 2-31 and ceases contact, the rolling friction disappears. At this point, the roller 2-51 stops rotating, and the baffle component 2-52 and the base plate component 2-53 change from an initial L-shaped structure that is perpendicular to each other to a planar structure that is parallel to each other and tightly superimposed, i.e., an I-shaped structure. During this process, the lever adjusting wheel 2-571 moves to the outside of the outer slide rail 2-32, and the lever adjusting wheel 2-571 is tangent to the outer surface of the outer slide rail 2-32. Under the action of friction, it drives the lever shaft to rotate in the same direction as the picking actuator 2.

[0094] The relative position of the picking unit 2-5 within the feeding zone to the pineapple to be picked is the process of the picking unit 2-5 falling from above the pineapple to below it and undergoing deformation. At the initial point of the feeding zone, the baffle component 2-52 and the base plate component 2-53 are perpendicular to each other, forming an L-shaped structure. As the main frame 2-2 rotates, the roller 2-51 rotates, and the picking unit 2-5 deforms, changing from an L-shaped structure with a larger projected area on the ground to an L-shaped structure with a straight line projected on the ground. Since the rotational linear velocity of the picking actuator 2 is the same as and opposite to the forward speed of the whole machine, the L-shaped picking unit 2-5 is inserted into the fruit cluster in a direction perpendicular to the ground and enters below the connection point between the fruit and the stem. This minimizes the problem of collision damage between the mechanism and the fruit and buds caused by the picking actuator 2 sweeping through the fruit cluster. The pineapple fruit gradually and orderly enters the picking zone under the action of the picking unit 2-5. Simultaneously, when the harvesting unit 2-5 deforms, it causes the pusher plate component 2-56 to retract in the opposite direction to the overall machine's forward movement. This retracts any pineapple fruits that might come into direct contact with the harvesting unit 2-5, moving them in front of the unit to prevent direct collisions. The part of the pusher plate component 2-56 that directly contacts the fruit is a silicone plate, a soft contact that will not damage the fruit. Furthermore, the rotating, plum blossom-shaped silicone sleeve 2-572 also retracts any pineapple fruits it comes into contact with, moving them in front of the harvesting unit 2-5, thus providing double protection for the pineapple fruits within the feeding zone.

[0095] Harvesting area working process and principle:

[0096] After passing through the feeding zone, the picking unit 2-5 enters the picking zone. At this point, the roller 2-51 begins to contact the inner side of the outer slide rail 2-32. The resulting friction causes the roller 2-51 to rotate until, driven by the main frame 2-2, the roller 2-51 disengages from the inner side of the outer slide rail 2-32. Since the inner side of the outer slide rail 2-32 and the outer side of the inner slide rail 2-31 have the same arc length, the rotation arc of the roller 2-51 is the same as in the feeding zone. However, because the relative positions of the roller 2-51 and the slide rail are opposite, the friction generated is reversed, and the rotation direction of the roller 2-51 is also reversed. In this way, the picking unit 2-5 begins to fold in reverse order of its actions in the feeding zone. The angle between the push plate component 2-56 and the base plate component 2-53 gradually decreases from 180° to 90°, changing from a parallel planar relationship to an L-shaped perpendicular right-angle relationship. During this process, the lever adjusting wheel 2-571 continues to contact the outer side of the outer slide rail 2-32. Since the lever adjusting wheel 2-571 is always tangent to the outer side of the outer slide rail 2-32, the direction of rotation remains unchanged until it disengages from the outer slide rail 2-32 at the same time as the roller 2-51. The friction disappears, the lever adjusting wheel 2-571 stops rotating, and the folding action of the picking unit 2-5 also ends.

[0097] The relative positions of the picking units 2-5 and the pineapples to be picked within the picking area are as follows: Under the action of the picking units 2-5, the pineapples sequentially and orderly pass through the feeding area into the picking area and enter the gap between two adjacent picking units 2-5. At this time, the bottom plate grid surface 2-532 of the picking unit 2-5 is parallel to the ground and located below the connection point of the pineapple stem. The fruit contacts the arc-shaped limiting plate 2-41 of the limiting collection mechanism 2-4, preventing it from continuing to move under the action of the picking units 2-5. The pineapple fruit receives a thrust in the same direction as the machine's forward movement from the arc-shaped limiting plate 2-41 of the limiting collection mechanism 2-4, while the picking units 2-5 exert a force on the pineapple stem in the opposite direction to the machine's forward movement. Simultaneously, the pineapple stem receives a tensile force from the pineapple roots. These three forces create bending stress on the pineapple plant. Mature pineapples produce abscisic acid at the stem-stalk junction, making this the area of ​​least stress on the entire pineapple plant and most prone to breakage. Therefore, under bending stress, the stem-stalk junction is the first point of breakage, separating the fruit from the stem. The fallen pineapple fruit then falls into the L-shaped harvesting unit 2-5, where it is supported by the base plate component 2-53 and shielded by the baffle structure, preventing it from slipping. This completes the stem-breaking harvesting process.

[0098] Lifting section working process and principle:

[0099] After passing through the picking section, the picking unit 2-5 enters the lifting section. In this section, the picking unit 2-5 continues to operate under the drive of the main frame 2-2. Since there is no sliding rail mechanism in this section, the roller 2-51 and the lever adjusting wheel 2-571 do not rotate, and the picking unit 2-5 does not deform. The L-shaped structure continues to rotate around the central axis of the picking unit 2-5.

[0100] The relative position of the picking unit 2-5 and the pineapple to be picked within the lifting zone is as follows: after the fruit stem is separated, the stem remains in its original position on the ground, while the pineapple fruit is supported by the L-shaped picking unit 2-5 and gradually lifted as the mechanism rotates. During the lifting process, the angle between the rotating picking unit 2-5 and the ground gradually increases, but the L-shaped picking unit 2-5 and the arc-shaped limiting plate 2-41 below the limiting collection mechanism 2-4 form a U-shaped closed zone. The opening of this zone always faces upward, so the fruit can be gradually lifted within this zone as the picking unit 2-5 rotates without falling off.

[0101] Working process and principle of the fruit drop zone:

[0102] After passing through the lifting zone, the picking unit 2-5 enters the fruit dropping zone. In this zone, the picking unit 2-5 does not deform, but simply rotates around the central axis of the picking unit 2-5 with the main frame 2-2.

[0103] The relative position of the picking unit 2-5 and the pineapple to be picked within the fruit drop zone is as follows: When the picking unit 2-5 is raised to the end of the arc-shaped limiting plate 2-41 of the limiting collection mechanism 2-4, the arc-shaped limiting plate 2-41 below the picking unit 2-5 disappears and is replaced by a shock-absorbing sliding plate 2-42 at a certain angle to the ground. The U-shaped structure previously formed by the L-shaped picking unit 2-5 and the arc-shaped limiting plate 2-41 is broken, the support under the fruit disappears, and the fruit falls onto the shock-absorbing sliding plate 2-42 under the action of gravity and rolls down the slope to the outside of the picking execution mechanism 2. A conveyor belt or a collection box can be placed outside the picking execution mechanism 2 to collect the picked pineapples.

[0104] At this point, harvesting unit 2 has completed the feeding, harvesting, lifting and collection processes of the pineapple. Harvesting units 2-5 then enter the feeding area to carry out the next cycle of work, and so on.

[0105] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A low-damage, high-efficiency stem-breaking pineapple harvester, characterized in that: The machine includes a frame (1) and a harvesting mechanism (2), wherein the harvesting mechanism (2) includes a power transmission system (2-1), a main frame (2-2), a slide rail assembly, a limiting and collecting mechanism (2-4), and several harvesting units (2-5). The power transmission system (2-1), the slide rail assembly, and the limiting and collecting mechanism (2-4) are all fixedly connected to the frame (1). The several harvesting units (2-5) are evenly distributed around the main frame (2-2). The main frame (2-2) is shaftless. The roller frame structure has a power transmission system (2-1) located at one end of the main frame (2-2) and providing rotational power to the main frame (2-2). A limiting and collecting mechanism (2-4) is located inside the main frame (2-2). The bottom of the limiting and collecting mechanism (2-4) has an arc-shaped structure to limit the movement of fruits into the harvesting unit (2-5) below it. The upper part of the limiting and collecting mechanism (2-4) has an open structure to collect and discharge fruits falling from the harvesting unit (2-5) above it. The harvesting unit (2-5) includes rollers (2-51), baffle components (2-52), base plate components (2-53), two support plates (2-54), and two limiting slide plates (2-55). The baffle components (2-52) and base plate components (2-53) are fixedly mounted on the main frame (2-2) parallel to the axial direction of the main frame (2-2). The two limiting slide plates (2-55) are arranged parallel to each other and correspondingly on opposite sides of the two support plates (2-54). One end of each limiting slide plate (2-55) All are rotatably connected to the support plate (2-54) on the same side. A sliding track is provided on the limiting slide plate (2-55). The base plate component (2-53) is fixed between the two limiting slide plates (2-55). A roller (2-51) is mounted on one support plate (2-54). One end of the baffle component (2-52) in the width direction is installed between the two support plates (2-54) and its rotation is controlled by the roller (2-51). The other end in the width direction is slidably installed within the sliding track of the two limiting slide plates (2-55). The slide rail assembly includes an inner slide rail (2-31) and an outer slide rail (2-32). The arc-shaped outer surface of the inner slide rail (2-31) and the arc-shaped inner surface of the outer slide rail (2-32) are staggered along the rotation direction of the main frame (2-2). The arc-shaped outer surface of the inner slide rail (2-31) and the arc-shaped inner surface of the outer slide rail (2-32) provide rotational friction for the roller (2-51) that it cooperates with.

2. The low-damage, high-efficiency stem-breaking pineapple harvester according to claim 1, characterized in that: The picking unit (2-5) also includes a push plate component (2-56) and a lever component (2-57). The baffle component (2-52) and the push plate component (2-56) are fixedly connected by bolts. The lever component (2-57) includes a lever shaft and a lever adjusting wheel (2-571). The lever shaft is located on one side of the width direction of the base plate component (2-53) and is rotatably mounted between two limiting slide plates (2-55). The lever adjusting wheel (2-571) is rotatably mounted on a support plate (2-54) and arranged on the same side as the roller (2-51). The lever adjusting wheel (2-571) is coaxially fixedly connected to the lever shaft. During the feeding and picking of the pineapple, the lever adjusting wheel (2-571) contacts the arc-shaped outer surface of the outer slide rail (2-32).

3. A low-damage, high-efficiency stem-breaking pineapple harvester according to claim 1 or 2, characterized in that: The arc-shaped outer surface of the inner slide rail (2-31) has the same arc length as the arc-shaped inner surface of the outer slide rail (2-32).

4. The low-damage, high-efficiency stem-breaking pineapple harvester according to claim 2, characterized in that: The lever shaft is covered with a silicone sleeve (2-572) with a plum blossom-shaped cross section. The push plate component (2-56) includes a push plate body (2-561) and a connecting frame. The push plate body (2-561) is fixedly connected to the baffle component (2-52) through the connecting frame. The push plate body (2-561) is a silicone plate.

5. The low-damage, high-efficiency stem-breaking pineapple harvester according to claim 1, characterized in that: The limiting and collecting mechanism (2-4) includes an arc-shaped limiting plate (2-41), a shock-absorbing slide plate (2-42), and a slide plate bracket (2-43). The top of the arc-shaped limiting plate (2-41) is an open end. The shock-absorbing slide plate (2-42) is obliquely fixed on the arc-shaped limiting plate (2-41) through the slide plate bracket (2-43). The arc-shaped limiting plate (2-41) is fixed to the frame (1) through the slide plate bracket (2-43). The lower end of the shock-absorbing slide plate (2-42) faces the side of the main frame (2-2) away from the power transmission system (2-1) and extends out of the main frame (2-2).

6. The low-damage, high-efficiency stem-breaking pineapple harvester according to claim 1, characterized in that: The frame (1) includes a suspension frame (1-1), a support beam (1-2), a support frame (1-4), and a hydraulic cylinder (1-3). The suspension frame (1-1) is fixedly mounted on the rear side of the support beam (1-2), the support frame (1-4) is rotatably mounted on the front side of the support beam (1-2), and the hydraulic cylinder (1-3) is obliquely mounted between the support beam (1-2) and the support frame (1-4). The power transmission system (2-1), the slide rail assembly, and the limiting collection mechanism (2-4) are all fixedly connected to the support frame (1-4).

7. The low-damage, high-efficiency stem-breaking pineapple harvester according to claim 1, characterized in that: The power transmission system (2-1) includes a drive body (2-11) and a chain drive assembly (2-12). The drive body (2-11) is fixed on the frame (1), and the drive body (2-11) drives the main frame (2-2) to rotate through the chain drive assembly (2-12).

8. The low-damage, high-efficiency stem-breaking pineapple harvester according to claim 1, characterized in that: The main frame (2-2) includes a first frame body (2-21) and a second frame body (2-22) arranged coaxially and both being closed-loop structures. Several picking units (2-5) are arranged between the first frame body (2-21) and the second frame body (2-22). A hub (2-24) is coaxially fixed at the center of the first frame body (2-21) through several support rods (2-23). ​​The support rods (2-23) are radially distributed outward from the hub (2-24) as the center. The hub (2-24) is rotatably connected to the frame (1). The limiting collection mechanism (2-4) passes through the second frame body (2-22) and is fixedly connected to the frame (1).

9. A low-damage, high-efficiency stem-breaking pineapple harvester according to claim 1, characterized in that: The baffle component (2-52) includes a baffle frame (2-521) and a baffle grid surface (2-522) laid on the baffle frame (2-521). The baffle frame (2-521) is a rectangular frame structure.

10. A low-damage, high-efficiency stem-breaking pineapple harvester according to claim 1, characterized in that: The base plate component (2-53) includes a base plate frame (2-531) and a base plate grid surface (2-532) laid on the base plate frame (2-531).

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