Telescopic ladder assembly for picking fruits and vegetables

Abstract

The utility model relates to the technical field of fruit and vegetable picking, and discloses a telescopic ladder assembly for fruit and vegetable picking, which comprises a device main body, a telescopic mechanism is arranged at the lower end of the device main body, and the telescopic mechanism comprises a gear, a rotating shaft, a connecting plate, a clamping block, a turntable, a rack, a plurality of clamping grooves, a moving plate and a moving groove. A base is fixedly arranged at the lower end of the telescopic mechanism, a two-way lead screw is rotatably arranged in the base, two sliding blocks are in threaded connection with the outer portion of the two-way lead screw, connecting blocks are rotatably arranged at the lower ends of the two sliding blocks, and a supporting plate is rotatably arranged between the lower ends of the two connecting blocks; and a second crawling ladder is fixedly arranged at the upper end of the two-way screw rod. According to the fruit picking ladder assembly, a fruit farmer can freely adjust the height of the ladder assembly according to the picking requirement through the telescopic mechanism, the use flexibility and convenience are improved, the bidirectional lead screw rotates, then the supporting plate slides, a stable supporting structure is formed, and therefore the stability of the ladder assembly is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of fruit and vegetable picking, in particular to a telescopic ladder for fruit and vegetable picking. Background Technique

[0002] Fruit and vegetable picking, as an indispensable part of the agricultural field, refers to picking ripe fruits and vegetables in farmland or orchards, usually during the ripe season of fruits or vegetables to ensure fresh products are picked. Fruit and vegetable picking is of great significance to agricultural production and market supply. During the fruit and vegetable picking process, ladders become the main auxiliary tools. Many fruits and vegetables such as apples, pears, peaches, etc. often grow at high places on trees, and pickers often need to rely on stable and adjustable ladders to approach and safely pick these crops. Through the application of these auxiliary tools, the fruit and vegetable picking work can proceed more smoothly, ensuring that agricultural products can enter the market in a timely manner and with high quality to meet the needs of consumers.

[0003] Most of the existing ladders for fruit and vegetable picking have a fixed use height and cannot be flexibly adjusted according to the actual height of the fruit trees and the personal needs of the pickers. When encountering higher fruits, pickers have to adopt unstable methods such as tiptoeing, jumping, or even using other tools to try to pick, which not only increases safety hazards but also greatly reduces the picking speed and quality. Although some ladders have a height adjustment function, most of them only have a single safety guarantee and may not be able to fully protect the safety of users, increasing the risks during the picking process.

[0004] Therefore, the technical personnel in this field have provided a telescopic ladder for fruit and vegetable picking to solve the problems raised in the above background technique. Content of the Utility Model

[0005] The purpose of the utility model is to solve the deficiencies existing in the prior art, and a telescopic ladder for fruit and vegetable picking is proposed. By sliding the rotating shaft inside the connecting plate, then sliding the clamping block out of the inside of the connecting plate, and driving the rotating shaft to rotate through the turntable, further driving the gear to drive the rack to move upward. At this time, the moving plate follows it to move upward, thus completing the rising operation of the device main body. When the device main body rises to a suitable position, the rotating shaft drives the clamping block to move inside the connecting plate, and then the clamping block slides into the inside of the clamping groove to achieve limiting, which is convenient for fruit farmers to perform the fruit and vegetable picking operation.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A telescopic ladder for fruit and vegetable picking includes a device main body, and a telescopic mechanism is arranged at the lower end of the device main body. The telescopic mechanism includes a gear, a rotating shaft, a connecting plate, a clamping block, a turntable, a rack, a plurality of clamping grooves, a moving plate, and a moving groove;

[0008] A base is fixedly arranged at the lower end of the telescopic mechanism. A bidirectional lead screw is rotatably arranged inside the base. Two sliders are threadedly connected to the outside of the bidirectional lead screw. Connecting blocks are rotatably arranged at the lower ends of the two sliders. A support plate is rotatably arranged between the lower ends of the two connecting blocks. A second ladder is fixedly arranged at the upper end of the bidirectional lead screw. A first ladder is slidably arranged at the front end of the second ladder. Two springs are fixedly arranged inside the second ladder. Two limit blocks are slidably arranged inside the second ladder. A pull plate is fixedly arranged between the rear ends of the two limit blocks. Four universal wheels are fixedly arranged at the lower end of the base;

[0009] Through the above technical solution, when adjusting the height, the block on the outside of the rotating shaft drives the gear to rotate, and then the gear drives the rack to move, so that the moving plate drives the device body to move upward. When supporting the ladder frame, the bidirectional lead screw drives the two sliders to move relatively inside the base through rotation, so that the connecting block drives the support plate to slide at the lower end of the base, thus playing a supporting role. When the first ladder slides at the front end of the second ladder, the limit block will be embedded in the limit groove to play a stabilizing role.

[0010] Further, the upper end of the moving plate is fixedly arranged at the rear end of the lower end of the device body. The outside of the moving groove is opened on one side of the inside of the moving plate. The lower end of the connecting plate is fixedly arranged at the upper end of the base;

[0011] Through the above technical solution, when the moving plate moves inside the connecting plate, it will drive the device body to move synchronously. The moving groove on one side of the moving plate makes the movement stable.

[0012] Further, the outside of the gear is rotatably arranged inside the connecting plate. One side of the rack is fixedly arranged on the side of the moving plate close to the gear. The outside of the gear is meshed and connected to the other side of the rack;

[0013] Through the above technical solution, when the gear rotates, it will drive the rack meshed with it to move inside the moving plate, and the operation is convenient.

[0014] Further, the lower end of the block is fixedly arranged at the upper end of the rotating shaft. The outside of the block is slidably arranged inside the gear. The outside of multiple card slots is opened inside the connecting plate. The outside of the rotating shaft is slidably arranged inside the gear. The side of the rotating shaft away from the block is fixedly arranged on the side of the turntable close to the gear;

[0015] Through the above technical solution, by sliding the block out of the card slots opened inside the connecting plate and all sliding into the gear, then, rotating the turntable, driving the rotating shaft to rotate, and transmitting it to the gear, so that the gear drives the rack to move upward, thus meeting the requirements for picking fruits and vegetables at different heights.

[0016] Further, a plurality of limiting grooves are formed at the rear end of the first ladder, and the outer parts of the two limiting blocks are slidably arranged inside two of the plurality of limiting grooves, and the front ends of the two springs are respectively fixedly arranged at the rear ends of the two limiting blocks;

[0017] Through the above technical solution, when the first ladder slides, the limiting block will slide in the limiting groove formed at its rear end and squeeze the spring. When the limiting block is embedded in the limiting groove, it will provide additional safety protection.

[0018] Further, the upper end of the first ladder is fixedly arranged at the front end of the device main body, the outer part of the support plate is slidably arranged at the lower end of the base, and a scale line is fixedly arranged on one side of the telescopic mechanism;

[0019] Through the above technical solution, when the device main body rises, it will drive the first ladder to move accordingly. When the support plate operates, it will slide at the lower end of the base. The scale line enables the operator to accurately adjust, and the operation is convenient.

[0020] Further, a handrail is fixedly arranged at the upper end of the device main body, and a guardrail is hinged at the front end of the handrail;

[0021] Through the above technical solution, the handrail and the guardrail improve the safety factor of the fruit farmers during the picking operation and build a solid protection barrier.

[0022] The utility model has the following beneficial effects:

[0023] 1. For the retractable ladder frame for fruit and vegetable picking proposed by the utility model, when the height of the ladder frame needs to be adjusted, the rotating shaft slides inside the connecting plate, so that the clamping block at the upper end of the rotating shaft slides out of the clamping groove formed inside the connecting plate and completely slides into the gear, thereby releasing the limit on the rotating shaft. Then, the rotating shaft and the clamping block are rotated through the turntable, and the clamping block will drive the gear to rotate. Since the gear meshes with the rack, the rotation of the gear will push the rack and the moving plate to move inside the connecting plate. The moving groove on one side of the moving plate plays a stabilizing role to avoid shaking, thus realizing the telescopic function of the ladder frame.

[0024] 2. For the retractable ladder for fruit and vegetable picking proposed by the present utility model, when the main body of the device rises, it will drive the first ladder to rise synchronously, causing the first ladder to slide at the front end of the second ladder. The first ladder squeezes the limit block inside the second ladder, causing it to contract together with the spring. As the main body of the device and the first ladder reach the required height, the compressed spring will release energy and push the limit block to move, which makes the limit block re-engage into the limit slot of the first ladder, thereby locking the relative positions of the first ladder and the second ladder. This not only ensures the stability of the ladder but also provides additional safety protection, effectively reducing the accidental risks during fruit and vegetable picking. When the ladder needs to be firmly supported, the bidirectional lead screw rotates to drive the slider to move relatively inside the base. The slider drives the support plate to slide at the lower end of the base through the connecting block, causing the support plate to gradually contact the ground, converting the ladder from a moving state to a stable support state, thereby improving the safety of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is the front axonometric schematic diagram of the present utility model;

[0026] Figure 2 is the rear axonometric schematic diagram of the present utility model;

[0027] Figure 3 is the top cross-sectional axonometric schematic diagram of the telescopic mechanism of the present utility model;

[0028] Figure 4 is the partial rear cross-sectional axonometric schematic diagram of the telescopic mechanism of the present utility model;

[0029] Figure 5 is the partial top cross-sectional axonometric schematic diagram of the first ladder and the second ladder of the present utility model;

[0030] Figure 6 is the axonometric schematic diagram of the present utility model near the bidirectional lead screw.

[0031] LEGEND DESCRIPTION:

[0032] 1. Main body of the device; 2. First ladder; 3. Second ladder; 4. Base; 5. Handrail; 6. Guardrail; 7. Telescopic mechanism; 8. Bidirectional lead screw; 9. Universal wheel; 10. Scale line; 11. Limit slot; 12. Pulling plate; 13. Limit block; 14. Spring; 15. Slider; 16. Connecting block; 17. Support plate; 701. Gear; 702. Rotating shaft; 703. Connecting plate; 704. Clamping block; 705. Turntable; 706. Rack; 707. Card slot; 708. Moving plate; 709. Moving groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0034] Referring to Figure 1-6 , an embodiment provided by the present invention is as follows:

[0035] A retractable ladder for fruit and vegetable picking, comprising a device main body 1. A telescopic mechanism 7 is arranged at the lower end of the device main body 1. The telescopic mechanism 7 includes a gear 701, a rotating shaft 702, a connecting plate 703, a clamping block 704, a turntable 705, a rack 706, a plurality of card slots 707, a moving plate 708 and a moving groove 709. The upper end of the moving plate 708 is fixedly arranged at the rear end of the lower end of the device main body 1. The moving groove 709 is externally opened on one side of the inner part of the moving plate 708. The lower end of the connecting plate 703 is fixedly arranged at the upper end of the base 4. The gear 701 is externally rotatably arranged inside the connecting plate 703. One side of the rack 706 is fixedly arranged on the side of the moving plate 708 close to the gear 701. The outer part of the gear 701 is meshed and connected to the other side of the rack 706. The lower end of the clamping block 704 is fixedly arranged at the upper end of the rotating shaft 702. The outer part of the clamping block 704 is slidably arranged inside the gear 701. A plurality of card slots 707 are externally opened inside the connecting plate 703. The outer part of the rotating shaft 702 is slidably arranged inside the gear 701. One side of the rotating shaft 702 away from the clamping block 704 is fixedly arranged at the side of the turntable 705 close to the gear 701. A scale line 10 is fixedly arranged on one side of the telescopic mechanism 7;

[0036] When picking fruits and vegetables and the ladder needs to be adjusted to a specific height, first, rotate the turntable 705 to make the rotating shaft 702 slide inside the connecting plate 703, causing the block 704 outside the rotating shaft 702 to disengage from the slot 707 inside the connecting plate 703. Immediately afterwards, the block 704 will be completely embedded inside the gear 701, thus releasing the limit operation on the rotating shaft 702 and the gear 701. When the rotating shaft 702 does not slide, a part of the block 704 at the upper end of the rotating shaft 702 is always inside the gear 701. Subsequently, by rotating the turntable 705, the connected rotating shaft 702 and the block 704 are driven to rotate together. Since the block 704 completely slides into the gear 701, the gear 701 is driven to start rotating. Since the gear 701 meshes with the rack 706, when the gear 701 rotates, it will push the rack 706 and the moving plate 708 fixedly connected thereto to slide smoothly inside the connecting plate 703. The moving groove 709 on one side of the moving plate 708 plays a crucial role in guiding and stabilizing during this process, ensuring the linear movement path of the moving plate 708, effectively avoiding the shaking phenomenon that may occur during the telescoping process, and ensuring the smoothness and stability of the telescoping process of the ladder. Through the linkage mechanism of the block 704, the gear 701 and the rack 706, combined with the stable guiding structure of the moving plate 708 and the moving groove 709, the convenient adjustment of the height of the ladder is realized, which not only ensures the smoothness and safety during the operation process, but also greatly improves the flexibility and efficiency of the use of the ladder, enabling the ladder to be adjusted in height according to fruits and vegetables at different heights, improving the flexibility and efficiency of the picking operation. At the same time, there are scale lines 10 on one side of the connecting plate 703, which are used to indicate the telescoping length of the ladder, facilitating the fruit farmers to accurately adjust to the required height and helping to improve the picking quality.

[0037] A base 4 is fixedly arranged at the lower end of the telescoping mechanism 7. A bidirectional lead screw 8 is rotatably arranged inside the base 4. Two sliders 15 are threadedly connected to the outside of the bidirectional lead screw 8. Connecting blocks 16 are rotatably arranged at the lower ends of the two sliders 15. A support plate 17 is rotatably arranged between the lower ends of the two connecting blocks 16. The outside of the support plate 17 is slidably arranged at the lower end of the base 4. Four universal wheels 9 are fixedly arranged at the lower end of the base 4;

[0038] The universal wheel 9 enables the ladder frame to move easily, improving the portability of the ladder frame. When changing the form of the ladder frame, by rotating the bidirectional lead screw 8, the two sliders 15 threadedly connected thereto will be affected by the driving force and move relative to each other along the axis direction of the bidirectional lead screw 8. When the slider 15 moves, it will drive the support plate 17 to operate through the connecting block 16, and the support plate 17 will move along the sliding track inside the base 4, thereby ensuring that the support plate 17 can accurately and smoothly contact the ground. When the support plate 17 contacts the ground, the change in its weight and position causes the universal wheel 9 at the lower end of the base 4 to gradually lift and finally leave the ground, thus realizing the conversion of the ladder frame from the moving state to the stable support state, not only improving the flexibility and adaptability of the ladder frame, but also ensuring stable and reliable support in the fruit and vegetable picking environment, greatly improving the safety and efficiency of the operation.

[0039] A second ladder 3 is fixedly arranged at the upper end of the bidirectional lead screw 8. A first ladder 2 is slidably arranged at the front end of the second ladder 3. Two springs 14 are fixedly arranged inside the second ladder 3. Two limit blocks 13 are slidably arranged inside the second ladder 3. A pull plate 12 is fixedly arranged between the rear ends of the two limit blocks 13. A plurality of limit grooves 11 are formed at the rear end of the first ladder 2. The outer parts of the two limit blocks 13 are slidably arranged inside two of the plurality of limit grooves 11. The front ends of the two springs 14 are respectively fixedly arranged at the rear ends of the two limit blocks 13. The upper end of the first ladder 2 is fixedly arranged at the front end of the device main body 1 near the rear end.

[0040] When the device main body 1 moves upward, it will synchronously drive the connected first ladder 2 to move upward, causing the first ladder 2 to slide at the front end of the second ladder 3. At this time, the first ladder 2 will squeeze the limit block 13 inside the second ladder 3, causing it to drive the connected spring 14 to contract and making the pull plate 12 slide at the rear end of the second ladder 3. When the first ladder 2 follows the device main body 1 to reach the required position, the compressed spring 14 will rebound and drive the connected limit block 13 to move, causing the limit block 13 to re-engage with the limit groove 11 and locking the position between the first ladder 2 and the second ladder 3, thereby ensuring the stability of the ladder during use, adding additional safety guarantees, and reducing the accidental risks during fruit and vegetable picking.

[0041] At the upper end of the device main body 1, a handrail 5 is fixedly arranged. The handrail 5 provides an additional gripping point for fruit farmers. Especially when balance and posture conversion are needed, it can effectively help fruit farmers maintain body stability and reduce the accidental risk caused by imbalance. At the front end of the handrail 5, a guardrail 6 is hingedly arranged. The guardrail 6 further strengthens the safety protection. The guardrail 6 can be flexibly adjusted according to actual needs, thus forming an enclosed protection space, effectively preventing fruit farmers from inadvertently crossing the boundary when concentrating on their work, and greatly reducing the possibility of falling from a height. The integration of the handrail 5 and the guardrail 6 not only improves the overall safety of the ladder frame but also creates a more reassuring working environment for fruit farmers, enabling them to focus more on the work itself when performing the picking task without excessive concern about potential safety hazards. At the same time, the handrail 5 is convenient for hanging tools and storing fruits.

[0042] Working principle: When adjusting the height of the device main body 1, first make the rotating shaft 702 slide within the connecting plate 703, driving the clamping block 704 to disengage from the clamping slot 707 in the connecting plate 703, so that the clamping block 704 is completely embedded in the inner cavity of the gear 701, thereby eliminating the constraint on the rotating shaft 702 and the gear 701. Subsequently, by means of the turntable 705, the rotating shaft 702 and the clamping block 704 are synchronously rotated. The rotation of the clamping block 704 will cause the gear 701 to rotate accordingly. The rotation of the gear 701 will push the rack 706 engaged with it to move within the connecting plate 703, and then the moving plate 708 fixedly connected to the rack 706 will move synchronously. During this process, the opening of the moving groove 709 provides stability for the movement of the connecting plate 703, enabling the device main body 1 to expand and contract smoothly. When the device main body 1 rises, the first ladder 2 connected to it will also rise and slide along the front end of the second ladder 3. At this time, the first ladder 2 presses the limit block 13 inside the second ladder 3, causing the limit block 13 and the spring 14 connected to it to contract together, and making the pull plate 12 slide at the rear end of the second ladder 3. As the device main body 1 and the first ladder 2 reach the appropriate height, the compressed spring 14 will rebound, pushing the limit block 13 to move. The limit block 13 inside the second ladder 3 will re-engage with the limit slot 11 of the first ladder 2, thereby locking the first ladder 2 and the second ladder 3, providing additional safety protection, and effectively reducing the picking risk. When the ladder frame enters the operation stage that requires stable support, by rotating the bidirectional lead screw 8, the slider 15 threadedly connected to its outer part will move relatively inside the base 4, causing the slider 15 to drive the connecting block 16 and drive the support plate 17 to slide at the lower end of the base 4. The sliding of the support plate 17 will gradually contact the ground. When the support plate 17 is in full contact with the ground, the ladder frame will transition from the original moving mode to the stable support state, and the universal wheels 9 at the lower end of the base 4 will be lifted off the ground, thereby enhancing the stability of the ladder frame during operation.

[0043] Finally, it should be noted that the above are only preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A telescopic ladder for picking fruits and vegetables, comprising a device body (1), characterized in that: A telescopic mechanism (7) is provided at the lower end of the device body (1), and the telescopic mechanism (7) comprises a gear (701), a rotating shaft (702), a connecting plate (703), a clamping block (704), a rotating disk (705), a rack (706), a plurality of clamping slots (707), a moving plate (708) and a moving slot (709); A base (4) is fixedly provided at the lower end of the telescopic mechanism (7), a bidirectional screw rod (8) is rotatably provided inside the base (4), two sliders (15) are externally threadedly connected to the bidirectional screw rod (8), a connecting block (16) is rotatably provided at the lower ends of the two sliders (15), a supporting plate (17) is rotatably provided between the lower ends of the two connecting blocks (16), a second ladder (3) is fixedly provided at the upper end of the bidirectional screw rod (8), a first ladder (2) is slidably provided at the front end of the second ladder (3), two springs (14) are fixedly provided inside the second ladder (3), two limit blocks (13) are slidably provided inside the second ladder (3), a pull plate (12) is fixedly provided between the rear ends of the two limit blocks (13), and four universal wheels (9) are fixedly provided at the lower end of the base (4).

2. The retractable ladder for picking fruits and vegetables according to claim 1, characterized in that: The upper end of the movable plate (708) is fixedly arranged at the rear end of the lower end of the device body (1), the outer portion of the movable groove (709) is opened inside the movable plate (708) at one side, and the lower end of the connecting plate (703) is fixedly arranged at the upper end of the base (4).

3. The retractable ladder for picking fruits and vegetables according to claim 1, characterized in that: The gear (701) is externally rotatably arranged inside the connecting plate (703), one side of the rack (706) is fixedly arranged on a side of the moving plate (708) close to the gear (701), and the gear (701) is externally meshedly connected to the other side of the rack (706).

4. The retractable ladder for picking fruits and vegetables according to claim 1, characterized in that: The lower end of the clamping block (704) is fixedly arranged on the upper end of the rotating shaft (702); the outside of the clamping block (704) is slidably arranged inside the gear (701); the outsides of the plurality of clamping slots (707) are all opened inside the connecting plate (703); the outside of the rotating shaft (702) is slidably arranged inside the gear (701); and the side of the rotating shaft (702) away from the clamping block (704) is fixedly arranged on the side of the rotating disk (705) close to the gear (701).

5. The retractable ladder for picking fruits and vegetables according to claim 1, characterized in that: A plurality of limit slots (11) are provided at the rear end of the first climbing ladder (2), the two limit blocks (13) are externally slidably arranged inside two of the plurality of limit slots (11), and the front ends of the two springs (14) are respectively fixedly arranged at the rear ends of the two limit blocks (13).

6. The retractable ladder for picking fruits and vegetables according to claim 1, characterized in that: The upper end of the first ladder (2) is fixedly arranged at the front end of the device body (1) near the rear end, the support plate (17) is externally slidably arranged at the lower end of the base (4), and a scale mark (10) is fixedly arranged on one side of the telescopic mechanism (7).

7. The telescopic ladder for picking fruits and vegetables according to claim 1, characterized in that: A handrail (5) is fixedly provided at the upper end of the device body (1), and a guardrail (6) is hingedly provided at the front end of the handrail (5).

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