Lettuce harvester
By designing a lettuce harvester, and adopting an adaptive steering chassis and a double circular saw cutting assembly, the problems of low harvesting efficiency and high damage rate of lettuce were solved, and lettuce was harvested quickly and safely.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHENGDU UNIVERSITY OF TECHNOLOGY
- Filing Date
- 2025-06-26
- Publication Date
- 2026-06-16
AI Technical Summary
Traditional lettuce harvesting relies on manual labor, which is inefficient and has a high damage rate. Existing mechanical equipment has poor adaptability and high energy consumption, making it difficult to achieve fast and safe harvesting of lettuce.
The design of the lettuce harvester adopts a mobile locomotive adaptive steering chassis, wheels, electromagnetic clutch differential steering mechanism, double circular saw cutting assembly and conveying clamping mechanism, combined with a cooling and lubrication system to achieve stable steering, adaptive clamping and efficient cutting.
Achieving stable cutting and efficient transport of lettuce in complex terrain improves the efficiency and safety of lettuce harvesting while reducing energy consumption.
Smart Images

Figure CN224356711U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of agricultural machinery technology, and in particular to a lettuce harvester. Background Technology
[0002] Lettuce, belonging to the Asteraceae family, is an annual or biennial herbaceous plant. The above-ground stem is edible; its skin is whitish-green, and the flesh is crisp and tender. Young stems are bright green, turning whitish-green as they mature. Lettuce is primarily consumed for its tender, fleshy stems, which can be eaten raw, in salads, stir-fried, dried, or pickled. The tender leaves are also edible. It is believed to have benefits such as promoting digestion, relieving indigestion, and providing nutrients. During the later stages of harvesting, lettuce harvesters are often used.
[0003] Traditional lettuce harvesting relies on manual bending over, which is inefficient and has a high damage rate. Sometimes mechanical harvesting equipment is used, but current mechanical harvesting equipment has poor adaptability and high energy consumption, making it inconvenient for the fast and safe harvesting of lettuce. Therefore, we propose a lettuce harvester to solve the above problems. Utility Model Content
[0004] The purpose of this invention is to provide a lettuce harvester to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A lettuce harvester includes a mobile adaptive steering chassis. A motor power unit is installed at the right end of the mobile adaptive steering chassis. Two sets of wheels are installed on the outer surface of the mobile adaptive steering chassis. A drive assembly is installed on the upper surface of the mobile adaptive steering chassis. A set of adjustable robotic arms is installed on the upper surface of the drive assembly. A conveying and clamping mechanism is connected to the outer surface of each adjustable robotic arm. A collection basket assembly is placed on the upper surface of the mobile adaptive steering chassis. A set of double circular saw cutting components is installed at the left end of the mobile adaptive steering chassis.
[0007] In a further embodiment, the conveying and clamping mechanism includes two mounting support frames, a conveyor belt, multiple rollers, and two support frames, wherein the mounting support frames are fixedly connected to the adjusting robotic arm via mounting pins.
[0008] In a further embodiment, the dual circular saw cutting assembly includes two drive housings, each drive housing having an output end connected to the dual circular saw body, and the drive housing is equipped with a cooling and lubrication system.
[0009] In a further embodiment, the collecting basket component includes a collecting basket frame, which is a funnel-shaped flow guide structure, and the inner wall of the collecting basket frame is connected to a polyurethane buffer layer.
[0010] In a further embodiment, the locomotive power unit includes a differential steering mechanism, which comprises an electromagnetic clutch and a bevel gear set, and the steering response time is ≤0.3s.
[0011] Compared with the prior art, the beneficial effects of this utility model are:
[0012] This device, through its mobile locomotive adaptive steering chassis, wheels, and electromagnetic clutch differential steering mechanism, enables the lettuce harvester to maintain stable steering and adaptive clamping in complex terrain, increasing its applicability. The dual-circular saw cutting assembly and conveying clamping mechanism fully consider the structural characteristics of lettuce, ensuring both stability and cut integrity during the cutting process, facilitating effective lettuce cutting. Furthermore, the conveying clamping mechanism maintains the continuity and efficiency of the lettuce conveying process, ensuring the efficient operation of the entire conveying system and facilitating efficient harvesting and collection of lettuce. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a lettuce harvester.
[0014] Figure 2 This is a three-dimensional structural diagram of the conveying and clamping mechanism in a lettuce harvester.
[0015] Figure 3 A three-dimensional structural diagram of the blue collection component in a lettuce harvester.
[0016] Figure 4 This is the assembly drawing of the adaptive steering chassis of the mobile locomotive in the lettuce harvester.
[0017] Figure 5 This is a side view of the double circular saw cutting assembly in a lettuce harvester.
[0018] In the diagram: 1. Mobile locomotive adaptive steering chassis; 2. Wheels; 3. Adjustable robotic arm; 4. Drive assembly; 5. Locomotive power assembly; 6. Conveying and clamping mechanism; 61. Mounting support frame; 62. Conveyor belt; 63. Rollers; 64. Support frame; 7. Collection basket assembly; 71. Collection basket frame; 72. Polyurethane buffer layer; 8. Double circular saw cutting assembly; 81. Drive housing; 82. Double circular saw body. Detailed Implementation
[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0020] Please see Figure 1-5 In this utility model, the lettuce harvester includes a mobile vehicle adaptive steering chassis 1. A vehicle power assembly 5 is installed on the right end of the mobile vehicle adaptive steering chassis 1. Two sets of wheels 2 are installed on the outer surface of the mobile vehicle adaptive steering chassis 1. A drive assembly 4 is installed on the upper surface of the mobile vehicle adaptive steering chassis 1. A set of adjustable mechanical arms 3 is installed on the upper surface of the drive assembly 4. A conveying and clamping mechanism 6 is connected to the outer surface of each adjustable mechanical arm 3. A collection basket assembly 7 is placed on the upper surface of the mobile vehicle adaptive steering chassis 1. A set of double circular saw cutting assemblies 8 is installed on the left end of the mobile vehicle adaptive steering chassis 1.
[0021] The conveying and clamping mechanism 6 includes two mounting support frames 61, a conveyor belt 62, multiple rollers 63, and two support frames 64. The mounting support frames 61 are fixedly connected to the adjusting mechanical arm 3 by mounting nails. The conveying and clamping mechanism 6 enables the mechanical conveying of lettuce, facilitating efficient and stable harvesting of lettuce. The double circular saw cutting assembly 8 includes two drive housings 81. The output end of each drive housing 81 is connected to the double circular saw body 82. The drive housing 81 is equipped with a cooling and lubrication system, which enables integrated double circular saw cutting of lettuce, facilitating effective and safe cutting of lettuce.
[0022] The collecting basket component 7 includes a collecting basket frame 71, which has a funnel-shaped flow guide structure. The inner wall of the collecting basket frame 71 is connected to a polyurethane buffer layer 72, which can protect the lettuce during collection and facilitate the safe collection of the lettuce. The locomotive power component 5 includes a differential steering mechanism, which includes an electromagnetic clutch and a bevel gear set. The steering response time is ≤0.3s, which can realize the angle steering of this harvester, increase its applicability, and facilitate the harvesting operation of lettuce.
[0023] The working principle of this utility model is as follows:
[0024] In use, the operator first moves the harvester to the lettuce field. Through the cooperation of the mobile vehicle adaptive steering chassis 1 and the vehicle power component 5, the wheels 2 can be driven to rotate, and the angle of the harvester can be adjusted to complete the steering and direction adjustment of the vehicle. Before approaching the lettuce, the drive component 4 controls the adjustment of the mechanical arm 3 to adjust the angle of the conveying clamping mechanism 6 appropriately, so that the conveying clamping mechanism 6 can stably contact and gather the lettuce. At the same time, the double circular saw cutting component 8 is controlled to work, driving the double circular saw body 82 to rotate at high speed, completing the stable and intact cutting of the lettuce. The cut lettuce is continuously and stably conveyed by the cooperation of the conveyor belt 62, rollers 63 and support frame 64, and then falls into the collection basket 71, completing the efficient harvesting and collection of lettuce.
[0025] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
[0026] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A lettuce harvester, characterized in that: The system includes a mobile locomotive adaptive steering chassis (1), a locomotive power assembly (5) is installed on the right end of the mobile locomotive adaptive steering chassis (1), two sets of wheels (2) are installed on the outer surface of the mobile locomotive adaptive steering chassis (1), a drive assembly (4) is installed on the upper surface of the mobile locomotive adaptive steering chassis (1), a set of adjusting mechanical arms (3) is installed on the upper surface of the drive assembly (4), a conveying clamping mechanism (6) is connected to the outer surface of each adjusting mechanical arm (3), a collection basket assembly (7) is placed on the upper surface of the mobile locomotive adaptive steering chassis (1), and a set of double circular saw cutting assembly (8) is installed on the left end of the mobile locomotive adaptive steering chassis (1).
2. The lettuce harvester according to claim 1, characterized in that: The conveying clamping mechanism (6) includes two mounting support frames (61), a conveyor belt (62), multiple rollers (63) and two support frames (64). The mounting support frames (61) are fixedly connected to the adjusting mechanical arm (3) by mounting nails.
3. The lettuce harvester according to claim 1, characterized in that: The dual circular saw cutting assembly (8) includes two drive housings (81), and the output end of each drive housing (81) is connected to the dual circular saw body (82). The drive housing (81) is equipped with a cooling and lubrication system.
4. The lettuce harvester according to claim 1, characterized in that: The collecting basket component (7) includes a collecting basket frame (71), which is a funnel-shaped flow guide structure, and the inner wall of the collecting basket frame (71) is connected to a polyurethane buffer layer (72).
5. The lettuce harvester according to claim 1, characterized in that: The locomotive power assembly (5) includes a differential steering mechanism, which comprises an electromagnetic clutch and a bevel gear set, and the steering response time is ≤0.3s.