A pump-jet propulsion integrated lotus root harvesting machine with lotus stem crushing function

Abstract

This utility model belongs to the field of lotus root harvesting technology and discloses a pump-jet propulsion integrated lotus root harvesting machine with lotus stem crushing function. It includes a frame assembly, a propulsion system, a crushing system, a collection-pre-cleaning system, and a water jet system. The propulsion system is installed at the bottom of the frame assembly and drives its movement. The crushing system is installed at the bottom of the frame assembly and crushes the lotus stems. The collection-pre-cleaning system is installed at the bottom of the frame assembly and collects and cleans the lotus roots. The water jet system is installed at the bottom of the frame assembly and washes away the mud from the lotus roots. The crushing system includes crushing blades and a crushing motor. The output end of the crushing motor is connected to a drive shaft, which is mounted at the bottom of the frame assembly via a bearing seat and connected to the crushing blades. The beneficial effects of this utility model are: reducing lotus root harvesting costs, improving harvesting efficiency, and promoting the development of lotus root and its by-products.

Description

Technical Field

[0001] This utility model relates to the field of lotus root harvesting technology, and in particular to a pump-jet propulsion integrated lotus root harvesting machine with lotus stem crushing function. Background Technology

[0002] Lotus root, as an economic crop, grows in the high-viscosity silt at the bottom of water bodies, with lotus leaves, stems, and other entwined structures densely distributed on the water surface. Currently, it is mainly harvested through traditional manual labor or semi-mechanized equipment. Traditional manual harvesting requires workers to be submerged in the muddy water, pulling the lotus roots by hand or using high-pressure water jets. This method is labor-intensive, inefficient, and severely limited by water depth and temperature. Semi-mechanized harvesting relies on manual labor to propel the machine through the water, or the use of large self-propelled equipment. This method is costly, has poor environmental adaptability, high energy consumption, and poor system reliability.

[0003] Traditional lotus root harvesting techniques have several problems and shortcomings, limiting the speed, efficiency, and applicability of harvesting. Here are some common problems and shortcomings of lotus root harvesting techniques: 1. Lack of mobility: Traditional lotus root harvesting machinery, such as tracked self-propelled lotus root harvesters, cannot simultaneously navigate shallow water areas and avoid getting stuck in deep mud, resulting in insufficient maneuverability. 2. Poor environmental adaptability: Traditional harvesting devices, such as semi-mechanical self-propelled lotus root diggers, lack anti-entanglement design, and their propulsion systems are easily entangled by weeds, leading to malfunctions and shutdowns. 3. Poor functional integration: Traditional split-type equipment, such as self-propelled hydraulic lotus root diggers, can complete the harvesting work through water jets, but cannot achieve collection and washing functions. The separation of harvesting and washing processes easily leads to secondary pollution. 4. Imbalance between efficiency and energy consumption: Small portable equipment, such as a single-person handheld excavator, can harvest more lotus roots per day than manual labor, but it cannot meet the needs of large-scale operations; large self-propelled equipment, such as a passenger-type harvester, can harvest a large amount of lotus roots per day, but it consumes a lot of energy and has high purchase costs, which are difficult for small and medium-sized growers to afford, and the investment return cycle is long.

[0004] Therefore, it is necessary to provide a pump-jet propulsion integrated lotus root harvester with lotus stem crushing function, which has the advantages of high integration and automation, strong environmental adaptability, high harvesting efficiency, low cost, and minimal damage to lotus roots, thereby reducing the cost of harvesting lotus roots, improving harvesting efficiency, and promoting the development of lotus root and its by-products. Utility Model Content

[0005] This utility model discloses a pump-jet propulsion integrated lotus root harvesting machine with lotus stem crushing function, which can effectively solve the technical problems involved in the background art.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows:

[0007] A pump-jet propulsion integrated lotus root harvester with lotus stem crushing function includes a frame assembly, a propulsion system, a crushing system, a collection-pre-cleaning system, and a water jet system. The propulsion system is installed at the bottom of the frame assembly and is used to move the frame assembly. The crushing system is installed at the bottom of the frame assembly and is used to crush the lotus stems. The collection-pre-cleaning system is installed at the bottom of the frame assembly and is used to collect and clean the lotus roots. The water jet system is installed at the bottom of the frame assembly and is used to flush away the silt from the lotus roots.

[0008] The crushing system includes a crushing blade and a crushing motor. The output end of the crushing motor is connected to a second drive shaft. The second drive shaft is mounted on the bottom of the frame assembly through a bearing seat. The second drive shaft is connected to the crushing blade.

[0009] The propulsion system includes a hull and a pump-jet propulsion unit. The hull is mounted on the bottom of the frame assembly, and the pump-jet propulsion unit is disposed within the hull. The hull has a water inlet and a water outlet. A filter screen is provided at the water inlet. The pump-jet propulsion unit includes a pump-jet housing. The pump-jet housing has a water inlet connected to the water inlet and a water outlet connected to the water outlet. A bearing support is provided inside the pump-jet housing, and a rotating shaft is provided on the bearing support. A rotating impeller is connected to the side of the rotating shaft near the water outlet. A propulsion motor is provided inside the hull. The propulsion motor is connected to the rotating shaft through a second coupling, and the propulsion motor is connected to a remote control module.

[0010] As a preferred improvement of this utility model: the second drive shaft is connected to the driven shaft via a bevel gear, the driven shaft is connected to the crusher, the second drive shaft is horizontally arranged, the driven shaft is vertically arranged, and the number of propulsion systems is two and they are located on both sides of the frame assembly.

[0011] As a preferred improvement of this utility model: the frame assembly includes a frame bottom layer, the frame bottom layer is connected to the frame top layer through a hollow tube, the outer wall of the hollow tube is slidably connected to the frame vertical moving layer, the frame top layer is provided with a lead screw motor, the lead screw motor is connected to the frame vertical moving layer through a lead screw and is used to drive the frame vertical moving layer to move up and down, and the water jet system is installed on the frame vertical moving layer.

[0012] As a preferred improvement of this utility model: the water jet system includes a water pump, the water pump is connected to a water jet pinion nozzle, the water jet pinion nozzle is installed on the vertical moving layer of the frame, the bottom of the water jet pinion nozzle is connected to a water jet nozzle connector, the bottom of the water jet nozzle connector is connected to a water jet nozzle extension pipe, the bottom of the water jet nozzle extension pipe is connected to a water jet nozzle, the water jet pinion nozzle is connected to a drive gear, the drive gear has a first transmission shaft at its center, the first transmission shaft is connected to a rudder, and the rudder is connected to a servo motor.

[0013] As a preferred improvement of this utility model: the number of water jet pinion nozzles, water jet nozzle connectors, water jet nozzle extension pipes and water jet nozzles are all 4 and connected in a one-to-one correspondence; the number of drive gears, the first drive shaft, the rudder disc and the servo motor are all 2 and connected in a one-to-one correspondence; one drive gear connects two water jet pinion nozzles; the water pump is connected to a four-way water distributor through a hose; and the four-way water distributor connects to four water jet pinion nozzles.

[0014] As a preferred improvement of this utility model, the crushing motor, the second transmission shaft and the bearing seat are provided with protective covers.

[0015] As a preferred improvement of this utility model: the collection-pre-cleaning system includes an upper right bearing seat and an upper left bearing seat of the collection system mounted on the frame assembly. An upper rotating shaft of the collection system is provided on the upper right bearing seat and the upper left bearing seat of the collection system. The upper rotating shaft is connected to an upper rotating wheel, which is connected above the tracked chain mesh belt. A lower rotating wheel is connected below the tracked chain mesh belt, and the lower rotating wheel is mounted on a lower bearing seat of the collection system. The lower bearing seat of the collection system is mounted at the bottom of the frame assembly. The upper rotating shaft of the collection system is connected to a mesh belt motor. Hooks are provided on the tracked chain mesh belt.

[0016] As a preferred improvement of this utility model: a collection guide plate is provided at the lower bearing seat of the collection system, a water pipe support is provided on the frame assembly, a straight pipe is provided on the water pipe support, the straight pipe is located at the track chain mesh belt, the straight pipe is provided with multiple cleaning nozzles, and the straight pipe is connected to the water source through a tee fitting.

[0017] As a preferred improvement of this utility model: the frame assembly is provided with a collection frame mounting slot, the collection frame mounting slot is provided with a tilting motor, the tilting motor is connected to a steering mechanism via a belt, the steering mechanism is connected to the collection frame, and the collection frame is located at the outlet of the track chain mesh belt.

[0018] As a preferred improvement of this utility model: the lotus root harvesting machine is equipped with a solar panel, a control board, an infrared high-definition camera and a storage battery.

[0019] The beneficial effects of this utility model are as follows:

[0020] The integrated lotus root harvester with pump-jet propulsion and lotus stem crushing has optimized the propulsion system and adopted a pump-jet catamaran structure. Combined with the lotus stem crushing system, it greatly improves the passability in complex waters. At the same time, it is equipped with a collection-pre-cleaning-turning device to realize the integration of the entire harvesting process. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0022] Figure 1 This is a schematic diagram of a pump-jet propulsion integrated lotus root harvesting machine with a lotus stem crusher according to the present invention.

[0023] Figure 2 This is a schematic diagram of the frame assembly structure of this utility model;

[0024] Figure 3 This is a schematic diagram of the crushing system of this utility model;

[0025] Figure 4 This is a schematic diagram of the collection-pre-cleaning system of this utility model;

[0026] Figure 5 This is a schematic diagram of the propulsion system structure of this utility model;

[0027] Figure 6 This is a schematic diagram of the pump-jet propulsion structure of this utility model;

[0028] Figure 7 This is a schematic diagram of the tipping structure of this utility model;

[0029] Figure 8 This is a schematic diagram of the installation of the planetary gear set and water jet nozzle of this utility model;

[0030] Figure 9 This is a schematic diagram of the water jet system structure of this utility model;

[0031] Figure 10 This is a schematic diagram of the installation of the top component of the frame assembly of this utility model.

[0032] In the diagram: 1-Bottom layer of the frame, 2-Collection frame mounting slot, 3-Right-side bearing seat of the upper part of the collection system, 4-Upper rotating shaft of the collection system, 5-Crawler chain mesh belt, 6-Upper layer of the frame, 7-Waterproof battery box, 8-Solar panel, 9-Screw motor seat, 10-Hollow tube, 11-Vertical moving layer of the frame, 12-Water jet nozzle connector, 13-Water jet nozzle extension pipe, 14-Water pump, 15-Water jet nozzle, 16-Lower limiting fixing plate, 17- 18-Upper limiting and fixing plate, 19-Hull, 20-Drive gear, 21-Rudder, 22-Water jet nozzle, 23-Vertical lifting layer screw mounting hole, 24-Limiting and fixing plate mounting hole, 25-Looper hook, 26-Upper left side bearing seat of collection system, 27-Wire mesh belt motor, 28-Hollow tube mounting hole, 29-Lower water jet nozzle mounting hole, 30-Lower screw mounting hole, 31-Collection guide plate, 32-Lower bearing of collection system 33-Pump-jet propulsion unit, 34-Crushing blade, 35-Screw screw, 36-Long plug, 37-First coupling, 38-First drive shaft, 39-Steering gear, 40-Water jet pinion nozzle hole, 41-Drive shaft hole, 42-Steering gear mounting hole, 43-Hose, 44-Four-way water distributor, 45-Upper rotating wheel, 46-Protective cover, 47-Control board, 48-Infrared high-definition camera, 49-Battery, 50-T-fitting, 51-Cleaning nozzle, 5 2-Water pipe support, 53-Propulsion motor, 54-Second coupling, 55-Remote control module, 56-Filter screen, 57-Tilting motor, 58-Belt, 59-Steering mechanism, 60-Collection frame, 61-Crushing motor, 62-Bearing seat, 63-Bevel gear, 64-Driven shaft, 65-Second transmission shaft, 66-Straight pipe, 67-Rotating impeller, 68-Rotating shaft, 69-Bearing support, 70-Inlet, 71-Outlet, 72-Screw motor. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to 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 the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0034] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0035] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0036] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0037] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0038] Please see Figure 1 As shown, this utility model provides a pump-jet propulsion integrated lotus root harvester with lotus stem crushing, which consists of a frame, a propulsion system, a crushing system, a collection-pre-cleaning system and a water jet system.

[0039] The rack consists of three base plates: a bottom layer, a vertical movement layer, and a top layer. The three layers are connected by hollow tubes. From bottom to top, four-hole plugs are inserted into the bottom of the hollow tubes, with the end of the plug inserted into the bottom of each tube and screwed into the four holes with self-tapping screws, thus securing the four hollow tubes to the bottom layer. These four hollow tubes are then inserted into the vertical movement layer along their guide direction. From top to bottom, four-hole plugs are inserted into the top layer, with the end of a longer plug inserted into the bottom of each tube and screwed into the four holes with self-tapping screws, thus securing the four hollow tubes to the top layer. Lead screws run through all three layers from top to bottom.

[0040] The propulsion system comprises a hull, filter screen, pump-jet propulsion unit, motor, remote control module, and coupling. The system utilizes a catamaran structure, with the propulsion system securely connected to the bottom frame via brackets and bolts. A water inlet is located at the bottom of the hull, where a filter screen is installed to remove impurities from the water. A water outlet is located at the stern of the hull. The pump-jet propulsion unit, consisting of a rotating impeller, rotating shaft, bearing supports, inlet, and outlet, is welded to the hull's bottom plate and primarily generates water flow for propulsion. The motor and remote control module are integrated and fixed to the hull's bottom plate, connected to the pump-jet propulsion unit's rotating shaft via a coupling, thereby driving the rotating impeller. The motor drives the rotating impeller, drawing external water into the hull through the inlet. The rotating impeller accelerates the water flow, which is then ejected through the outlet. The reaction force of the water flow generates propulsion, propelling the hull forward.

[0041] The crushing system consists of crushing blades, bevel gears, a rotating shaft, and bearing housings. A pair of meshing bevel gears are connected to the drive shaft and driven shaft respectively via flat keys. The drive shaft passes through the bearing housing and is fixed to the bottom layer of the frame. The driven shaft runs vertically downwards through the bottom layer of the frame, and its end passes through the center hole of the crushing blade and is secured with bolts. Power is transmitted to the driven shaft via the bevel gears, driving the crushing blades to rotate and achieve the function of crushing the stalks.

[0042] The collection-pre-cleaning system consists of a tracked chain mesh belt, lotus root hooks, a rotating shaft, a rotating wheel, bearing housings, guide plates, water pipe supports, a water pump, water pipes, cleaning nozzles, and T-fittings. The rotating shaft passes through the rotating wheel and is secured to both with set screws. The rotating shaft drives the rotating wheel through the tracked chain mesh belt and simultaneously passes through the bearing housing, where it is fixed to the bottom of the frame with bolts and nuts. The tracked chain mesh belt is angled, and lotus root hooks are installed on it. The main body of the hook has a U-shaped structure, with its two arms bent at right angles, extending to the surface of the object. The hook design ensures a firm grip. The inner surface of the hook is smoothed to reduce damage to the lotus root and ensure effective gripping. Due to the angle of the track, the hooks stably lift the lotus root during gripping and move it along the track chain towards the end of the track. When there is a height difference between the end of the track and the rear collection frame, the hooked lotus root naturally detaches and falls into the collection frame. The water pump is bolted to the front end of the base plate and connected to the pipe. The inlet of the pipe is connected to a tee fitting. One outlet of the tee fitting is connected to a straight pipe, which is fixed to the bottom of the frame with bolts and nuts and passes through the reserved holes of two water pipe supports. The nozzle is vertically installed at the end of the straight pipe, suspended directly above the conveyor belt, to spray and clean the lotus roots being transported.

[0043] The tipping system consists of a collection frame mounting slot, a collection frame, a rotating shaft, a belt, and a steering mechanism. The collection frame mounting slot passes through a pre-set slot at the bottom of the frame and is fixed to the bottom of the frame with bolts and nuts. The bottom support of the steering mechanism is fixed to both sides of the bottom of the collection frame mounting slot with bolts. The bottom of the collection frame aligns with the pre-drilled holes in the tipping module of the steering mechanism and is secured with bolts. The belt-driven rotating shaft of the steering mechanism outputs power, driving the collection frame to tip over when fully loaded, transferring the harvested lotus roots to the bank and preventing material from remaining in the collection frame, thus preparing for the next work cycle.

[0044] The waterjet system consists of a waterjet nozzle, nozzle connector, limiting and fixing plate, four-way water distributor, drive gear, rotating shaft, and hoses. The entire waterjet system is fixed in the vertical lifting layer of the frame. The waterjet nozzle is divided into three sections: a nozzle pinion section, a nozzle extension section, and a nozzle section. The nozzle pinion section passes through a pre-drilled hole in the vertical lifting layer of the frame and is fixed thereto. The nozzle extension section passes through a pre-drilled hole in the bottom layer of the frame. The waterjet nozzles are bonded together using the nozzle connector; the rotating shaft passes through the center of each of the two drive gears and is placed in a pre-drilled circular groove in the vertical lifting layer. The two drive gears mesh with gears in the two nozzle pinion sections, forming a planetary gear mechanism; the limiting and fixing plate passes through the nozzle pinion section and the rotating shaft and is fixed to the vertical lifting layer using double-ended bolts; a servo motor is mounted on the limiting plate; the four-way water distributor is connected to the four nozzles via hoses. The power system consists of solar panels, batteries, motors, and servo motors, providing energy for the movement of the fuselage.

[0045] Specifically, the pump-jet propulsion lotus root harvesting machine with lotus stem crusher is primarily driven by an electric motor and a servo motor. It is also equipped with solar panels, providing sufficient power to all systems via batteries and solar energy. The propulsion system consists of the frame base, hull, filter screen, pump-jet propulsion unit, motor, remote control, and coupling. Pump-jet propulsion offers greater flexibility, resistance to entanglement, and reliability, and is highly adaptable to complex water conditions. The crushing system, composed of blades, bevel gears, a rotating shaft, and bearing seats, simultaneously removes lotus leaves, stems, and weeds from the water surface, ensuring unobstructed passage and avoiding entanglement or blockage risks. A tracked chain mesh belt mechanism collects lotus roots that float to the surface, completing collection while the machine is moving forward. Lotus root hooks are installed on the tracked chain mesh belt to prevent lotus roots from slipping off the track, ensuring proper collection. Cleaning nozzles are installed above the tracked chain mesh belt for scheduled cleaning of the lotus roots, preventing secondary contamination during transport. The machine utilizes a planetary gear mechanism and a screw drive mechanism to control the raising, lowering, and rotating of the nozzles, enabling large-area rinsing of the lotus roots. The nozzles are arranged in an arc to expand the rinsing range and adapt to different water depths in the lotus pond, ensuring work quality. A water pump draws water from the lotus pond and converts it into a high-pressure water jet to rinse the lotus roots. The control system employs an OpenRF4 control board equipped with a high-performance STM32F407VET6 main control chip, and also features Bluetooth and Wi-Fi wireless communication for remote control. A web portal allows users to interact with the machine, displaying and controlling its operation, including path recording and display, remote control, and log recording and display. A solar power system is incorporated to absorb solar energy during operation, providing environmentally friendly power. This pump-jet propulsion lotus root harvesting machine with stalk crushing adopts a modular architecture, allowing for interchangeable harvesting, collection, and power units, improving production line compatibility, reducing mass production costs, and facilitating market promotion.

[0046] In summary, the advantages of this solution include the following: Improved mobility: Overcoming the obstacle of deep mud, a pump-jet propulsion catamaran structure is provided, solving the technical barrier of tracked equipment sinking beyond its limits in deep mud areas. Replacing traditional propellers with pump-jet propulsion avoids the problem of propulsion efficiency attenuation in shallow water. Eliminating stoppages caused by entanglement: An active rotating crusher system is designed to solve the problem of frequent failures caused by lotus leaves / stems entangled in moving parts. Constructing a closed-loop function for the entire harvesting process: Integrating harvesting, cleaning, collection, and dumping functions eliminates secondary pollution and damage caused by traditional separate operations. Modular architecture for easy mass production: Adopting standard interface quick-release modules, the harvesting, collection, and power units are interchangeable, eliminating redundant components of traditional equipment, improving production line compatibility, and reducing mass production costs. Intelligent control system: Replacing manual wading harvesting with remote control mode reduces labor costs while improving operational efficiency. Precise matching of pump-jet power and jet power consumption further reduces energy consumption per acre, achieving energy-efficient utilization. In summary, the pump-jet propulsion lotus root harvester with lotus stem crusher has optimized the propulsion system and adopted a pump-jet catamaran structure. Combined with the lotus stem crushing system, it greatly improves the passability in complex waters. At the same time, it is equipped with a collection-pre-cleaning-turnover device to achieve a high degree of integration of the entire harvesting process.

[0047] Example 1

[0048] This pump-jet propulsion lotus root harvesting machine with lotus stem crushing function consists of a frame, water jet system, collection system, power system, propulsion system, and automation and control system.

[0049] The frame consists of a bottom layer 1, an upper layer 6, hollow tubes 11, a vertical moving layer 11, lead screws 35, and long plugs 36. The hollow tubes 11 pass through the hollow tube mounting holes 29 on all three layers of the frame. The long plugs 36 are inserted into the hollow tubes 11 from bottom to top in the bottom layer 1 and secured with self-tapping screws. The lead screws 35 (used for the vertical movement of the vertical moving layer 11, or other lifting structures can be used) are fixed in the lower lead screw mounting hole 30 and pass through the vertical moving layer lead screw mounting hole 23, while also being connected and secured to the upper layer 6 with bolts and nuts. The long plugs 36 are inserted into the hollow tubes 11 from top to bottom in the upper layer 6 and secured with self-tapping screws.

[0050] The water jet system consists of a water jet pinion nozzle 22, a water jet nozzle extension pipe 13, a water jet nozzle 15, a water jet nozzle connector 12, a drive gear 20, a lower limiting fixing plate 16, an upper limiting fixing plate 17, a first drive shaft 38, a rudder disc 21, a rudder motor 39, a hose 43, a four-way water distributor 44, and a water pump 14. The water jet pinion nozzle 22 passes through the pre-reserved mounting hole in the vertical moving layer 11 of the frame and is connected to the water jet nozzle extension pipe 13 through the water jet nozzle connector 12, and then passes out through the pre-reserved mounting hole in the bottom layer 1 of the frame. This whole assembly is again connected to the water jet nozzle 15 through the water jet nozzle connector 12 to form a water jet nozzle. The first drive shaft 38 passes out from the center hole of the drive gear 20 and is fixed by a flat key. The whole assembly is placed in the pre-reserved mounting groove in the vertical moving layer 11 of the frame and meshes with the water jet pinion nozzle 22 to form a planetary gear set. The lower limiting and fixing plate 16 has a water jet pinion nozzle hole 40 and a drive shaft hole 41 reserved. The water jet pinion nozzle 22 and the first drive shaft 38 pass through the reserved holes. The rudder disk 21 is fixed to the first drive shaft 38 with screws. The rudder motor (used to adjust the water spray direction) is transmitted from the rudder motor mounting hole 42 reserved in the upper limiting and fixing plate 17 and connected to the rudder disk 21. The end face of the water jet pinion nozzle 22 is connected to the four-way water distributor 44 through the hose 43. The four-way water distributor 44 is connected to the water pump 14 through the hose 43.

[0051] The propulsion system consists of a hull 18, a filter screen 56, a pump-jet propulsion unit 33, a propulsion motor 53 (a two-phase hybrid stepper motor), a remote control module 55, a second coupling 54, and a bracket 19. The hull 18 is bolted to the bottom of the frame via the bracket 19. A water inlet is located at the bottom of the hull 18, where the filter screen 56 is installed; a water outlet is located at the rear of the hull. The pump-jet propulsion unit 33 is welded to the bottom plate of the hull 18. The two-phase hybrid stepper motor integrates the remote control module 55 and is fixed to the bottom plate of the hull with screws; its output shaft is connected to the pump-jet propulsion unit 33 via the second coupling 54. The pump-jet propulsion unit 33 mainly consists of a rotating impeller 67, a rotating shaft 68, a bearing support 69, a water inlet 70, and a water outlet 71. The rotating impeller 67 is coaxially fixed to the end of the rotating shaft 68, which passes through and is supported by the bearing support 69. During operation, the impeller 67 rotates at high speed, drawing water in through the inlet 70 and pressurizing and accelerating the water flow using centrifugal force. Subsequently, the pressurized and accelerated water flow is ejected at high speed through the outlet 71. The fluid reaction force generated by this high-speed jet provides the necessary propulsion for the hull.

[0052] The crushing system consists of crushing blades 34, bevel gears 63, a protective cover 48, a crushing motor 61 (gear motor), a second drive shaft 65, a driven shaft 64, and a bearing housing 62. The gear motor 61 is fixed to the front end of the frame, and its output shaft serves as the second drive shaft 65, passing through the bearing housing 62 for support and fixation. A pair of meshing bevel gears 63 are respectively mounted on the second drive shaft 65 and the driven shaft 64 via flat keys. The driven shaft 64 extends vertically downward through the bottom layer of the frame, and its end passes through the central hole of the crushing blades 34 and is secured with bolts. The protective cover 46 covers the bevel gears 63 for protection.

[0053] The collection-pre-cleaning system consists of a right-side bearing housing 3 at the top of the collection system, a left-side bearing housing 26 at the top of the collection system, an upper rotating shaft 4, a crawler chain mesh belt 5, a hook 25, a lower bearing housing 32 at the bottom of the collection system, a mesh belt motor 27 (JGA25-370 geared motor), a collection guide plate 31, an upper rotating wheel 45, a tee fitting 50, a cleaning nozzle 51, a water pipe bracket 52, and a straight pipe 66. The upper rotating shaft 4 passes through the upper rotating wheel 45 and is fixed by a set screw. The crawler chain mesh belt 5 is nested around the outer edge of the rotating wheel 45 and is arranged along the top and bottom of the collection system. The two ends of the upper rotating shaft 4 are supported in the left-side bearing housing 26 and the right-side bearing housing 3 at the top of the collection system, respectively. Its lower part is supported by the lower bearing housing 32 and connected to the JGA25-370 geared motor via a coupling. Lotus root hooks 25 are evenly distributed on the crawler chain mesh belt 5 via clips for gripping lotus roots. In the pipeline section, the outlet of the tee fitting 50 is connected to the straight pipe 62; the straight pipe 62 passes through the reserved holes of the two water pipe supports 52 and is fixed to the bottom of the frame with bolts and nuts; the cleaning nozzle 51 is vertically installed at the end of the straight pipe 62 and suspended directly above the crawler chain mesh belt 5. The collection guide plate 31 is installed on the side of the mesh belt to guide the direction of lotus root transportation.

[0054] The tipping system consists of a collection frame mounting slot 2, a collection frame 60, a belt 58, a steering mechanism 59, and a tipping motor 57 (planetary geared motor). The collection frame mounting slot 2 passes through a pre-set slot at the bottom of the frame and is fixed to the bottom of the frame with bolts and nuts. The bottom supports of the steering mechanism 59 are bolted to both sides of the bottom of the collection frame mounting slot 2. The bottom of the collection frame 60 aligns with the pre-drilled holes in the tipping module of the steering mechanism 59 and is secured with bolts. One end of the belt 58 is connected to the output shaft of the planetary geared motor, and the other end is linked to the rotation shaft of the steering mechanism 59 to transmit power.

[0055] The power system consists of a JGA25-370 geared motor, a servo motor 39, a planetary geared motor, a two-phase hybrid stepper motor, a geared motor, a solar panel 8, and a battery 49, providing the necessary torque and energy for the movement of each part.

[0056] The control system consists of an OpenRF4 control board 47 with an STM32F407VET6 main control chip and an infrared high-definition camera 48, both of which are fixed on the upper layer 6 of the rack. The infrared high-definition camera 48 records the surrounding environment and transmits the data to the control board 47, which then transmits the data to the Web terminal to realize the monitoring of the test screen and perform path planning.

[0057] Working principle:

[0058] Solar panels 8 and batteries 49 provide power to the water pump 14. The water pump 14 draws water from the pond and pressurizes it. The water is then distributed through a three-way pipe 50 to a hose 43, which in turn delivers the water to a four-way water distributor 44. The four-way water distributor 44 divides the water into four streams, which are then delivered through hoses 43 to water jet nozzles 22 and finally to water jet nozzles 15. High-pressure water jets are sprayed from the nozzles to wash away the silt covering the lotus roots. After the silt around the lotus roots is removed, the lotus roots float to the surface. The two-phase hybrid stepper motor in the hull 19 drives the pump-jet propulsion unit 33 through the second coupling 54 to provide forward thrust to the hull. During the forward movement of the hull, the GA25-370 geared motor drives the upper rotating shaft 4 of the collection-pre-cleaning system to rotate, which in turn causes the tracked chain mesh belt 5 to rotate. The lotus root hooks 25, which are fastened to the tracked chain mesh belt 5, grab and transport the collected lotus roots. Pressurized water is diverted through the three-way fitting 50 to the straight pipe 66 to deliver water to the cleaning nozzle 51 to pre-clean the transported lotus roots. The cleaned lotus roots continue to be transported to the collection frame 60. The planetary geared motor drives the belt 58 to drive the rotating shaft of the steering mechanism 59 to output power, driving the collection frame 60 to flip and achieve full-load unloading.

[0059] During the device's movement, the geared motor 61 at the front of the machine drives the second transmission shaft 65 to rotate, transmitting power to the driven shaft 64 via the bevel gear 63, which in turn drives the pulverizing blades 34 to rotate at high speed. Simultaneously, it removes obstacles such as lotus leaves, stems, and weeds from the water surface, ensuring a clear path for the equipment and avoiding the risk of entanglement or blockage.

[0060] During the high-pressure water jet ejection process of the water jet nozzle 15, the servo motor 39 drives the first drive shaft 38 to rotate, which in turn drives the water jet pinion nozzle 22 to rotate, thereby causing the water jet nozzle 15 to rotate. This process enables the device to flush away silt over a large area at the same location, significantly improving the efficiency of lotus root harvesting.

[0061] Simultaneously, during the rotation, the lead screw motor 72, fixed to the upper layer 6 of the frame, rotates, driving the lead screw to rotate and thus causing the vertical moving layer 11 of the frame to move up and down. Since the water jet system is fixed to the vertical moving layer 11, it moves vertically along with the frame during its vertical movement. This function causes the water jet nozzle 15 to decrease in depth as the silt is washed away, ensuring that the nozzle 15 is always in close contact with the silt, further improving harvesting efficiency. This function also enhances the device's adaptability to different water depths, making it more widely applicable than traditional lotus root harvesting machines.

[0062] The integrated lotus root harvesting machine with pump-jet propulsion and lotus stem crushing is an innovative product designed to solve the technical problems existing in the practical application of traditional lotus root harvesting machinery, thereby improving production efficiency and expanding its applicability. The following are the technical problems solved by the large-angle flushing integrated lotus root harvesting device: 1. Improved mobility: Overcoming the obstruction of deep mud, a pump-jet propulsion catamaran structure is provided, solving the technical obstacle of tracked equipment sinking beyond limits in deep mud areas. The pump-jet propeller replaces the traditional propeller, avoiding the problem of reduced propulsion efficiency in shallow water areas. 2. Elimination of stoppages caused by entanglement: An active rotating crushing blade system is designed to eliminate frequent malfunctions caused by lotus leaves / stems entangled in moving parts. 3. Construction of a closed-loop operation for the entire harvesting process: Integrating harvesting, cleaning, collection, and dumping functions, eliminating secondary pollution and damage caused by traditional separate operations. 4. Modular architecture for easy mass production: Adopting standard interface quick-release modules, the harvesting, collection, and power units are interchangeable, eliminating redundant components of traditional equipment, improving production line compatibility, and reducing mass production costs. 5. Intelligent control system: It replaces manual wading harvesting with remote control mode, which reduces labor costs and improves work efficiency. Through precise matching of pump power and jet power consumption, it further reduces energy consumption per acre and achieves energy-efficient utilization.

[0063] In summary, the pump-jet propulsion lotus root harvester with lotus stem crusher has optimized the propulsion system and adopted a pump-jet catamaran structure. Combined with the lotus stem crushing system, it greatly improves the passability in complex waters. At the same time, it is equipped with a collection-pre-cleaning-turning device to achieve full integration of the harvesting process.

[0064] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A pump-jet propulsion integrated lotus root harvesting machine with lotus stem crushing function, characterized in that: The device includes a frame assembly, a propulsion system, a crushing system, a collection-pre-cleaning system, and a water jet system. The propulsion system is installed at the bottom of the frame assembly and is used to move the frame assembly. The crushing system is installed at the bottom of the frame assembly and is used to crush the lotus stems. The collection-pre-cleaning system is installed at the bottom of the frame assembly and is used to collect and clean the lotus roots. The water jet system is installed at the bottom of the frame assembly and is used to flush away the silt from the lotus roots. The crushing system includes a crushing blade (34) and a crushing motor (61). The output end of the crushing motor (61) is connected to a second drive shaft (65). The second drive shaft (65) is mounted on the bottom of the frame assembly through a bearing seat (62). The second drive shaft (65) is connected to the crushing blade (34). The propulsion system includes a hull (18) and a pump-jet propulsion unit (33). The hull (18) is mounted on the bottom of the frame assembly. The pump-jet propulsion unit (33) is located inside the hull (18). The hull (18) has a water inlet and a water outlet. A filter screen (56) is provided at the water inlet. The pump-jet propulsion unit (33) includes a pump-jet housing. The pump-jet housing has an inlet (70) connected to the water inlet and an outlet (71) connected to the water outlet. A bearing support (69) is provided inside the pump-jet housing. A rotating shaft (68) is provided on the bearing support (69). A rotating impeller (67) is connected to the side of the rotating shaft (68) near the outlet (71). A propulsion motor (53) is provided inside the hull (18). The propulsion motor (53) is connected to the rotating shaft (68) through a second coupling (54). The propulsion motor (53) is connected to a remote control module (55).

2. The integrated lotus root harvesting machine with a pump-jet propulsion system for crushing lotus stems as described in claim 1, characterized in that: The second drive shaft (65) is connected to the driven shaft (64) via a bevel gear (63), and the driven shaft (64) is connected to the crusher (34). The second drive shaft (65) is horizontally arranged, and the driven shaft (64) is vertically arranged. There are two propulsion systems located on both sides of the frame assembly.

3. The integrated lotus root harvesting machine with a pump-jet propulsion system for crushing lotus stems as described in claim 1, characterized in that: The frame assembly includes a frame bottom layer (1), which is connected to the frame top layer (6) through a hollow tube (10). A frame vertical moving layer (11) is slidably connected to the outer wall of the hollow tube (10). The frame top layer (6) is provided with a lead screw motor (72), which is connected to the frame vertical moving layer (11) through a lead screw (35) and is used to drive the frame vertical moving layer (11) to move up and down. The water jet system is installed on the frame vertical moving layer (11).

4. The integrated lotus root harvesting machine with a pump-jet propulsion system for crushing lotus stems as described in claim 3, characterized in that: The water jet system includes a water pump (14), which is connected to a water jet pinion nozzle (22). The water jet pinion nozzle (22) is installed on the vertical moving layer (11) of the frame. The bottom of the water jet pinion nozzle (22) is connected to a water jet nozzle connector (12). The bottom of the water jet nozzle connector (12) is connected to a water jet nozzle extension pipe (13). The bottom of the water jet nozzle extension pipe (13) is connected to a water jet nozzle (15). The water jet pinion nozzle (22) is connected to a drive gear (20). The drive gear (20) has a first drive shaft (38) at its center. The first drive shaft (38) is connected to a rudder disk (21). The rudder disk (21) is connected to a servo motor (39).

5. The integrated lotus root harvesting machine with a pump-jet propulsion system for crushing lotus stems as described in claim 4, characterized in that: The number of water jet pinion nozzles (22), water jet nozzle connectors (12), water jet nozzle extension pipes (13), and water jet nozzles (15) are all 4 and connected one-to-one. The number of drive gears (20), the first drive shaft (38), the rudder disc (21), and the rudder motor (39) are all 2 and connected one-to-one. One drive gear (20) connects to two water jet pinion nozzles (22). The water pump (14) is connected to a four-way water distributor (44) through a hose (43). The four-way water distributor (44) connects to four water jet pinion nozzles (22).

6. The integrated lotus root harvesting machine with a pump-jet propulsion system for crushing lotus stems as described in claim 1, characterized in that: The crushing motor (61), the second drive shaft (65) and the bearing housing (62) are provided with protective covers (46).

7. The integrated lotus root harvesting machine with a pump-jet propulsion system for crushing lotus stems as described in claim 1, characterized in that: The collection-pre-cleaning system includes an upper right bearing seat (3) and an upper left bearing seat (26) of the collection system mounted on the frame assembly. The upper right bearing seat (3) and the upper left bearing seat (26) of the collection system are provided with an upper rotating shaft (4). The upper rotating shaft (4) of the collection system is connected to an upper rotating wheel (45). The upper rotating wheel (45) is connected above the track chain mesh belt (5). The track chain mesh belt (5) is connected below a lower rotating wheel. The lower rotating wheel is mounted on a lower bearing seat (32) of the collection system. The lower bearing seat (32) of the collection system is mounted at the bottom of the frame assembly. The upper rotating shaft (4) of the collection system is connected to a mesh belt motor (27). The track chain mesh belt (5) is provided with a hook (25).

8. The integrated lotus root harvesting machine with a pump-jet propulsion system for crushing lotus stems as described in claim 7, characterized in that: The collection system has a collection guide plate (31) at the lower bearing seat (32), the frame assembly has a water pipe support (52), the water pipe support (52) has a straight pipe (66), the straight pipe (66) is located at the track chain mesh belt (5), the straight pipe (66) has multiple cleaning nozzles (51), and the straight pipe (66) is connected to the water source through a tee fitting (50).

9. A pump-jet propulsion integrated lotus root harvesting machine with lotus stem crushing as described in claim 7, characterized in that: The frame assembly is provided with a collection frame mounting slot (2), the collection frame mounting slot (2) is provided with a tilting motor (57), the tilting motor (57) is connected to a steering mechanism (59) via a belt (58), the steering mechanism (59) is connected to a collection frame (60), and the collection frame (60) is located at the outlet of the track chain mesh belt (5).

10. A pump-jet propulsion integrated lotus root harvesting machine with lotus stem crushing as described in claim 1, characterized in that: The lotus root harvesting machine is equipped with a solar panel (8), a control board (47), an infrared high-definition camera (48), and a storage battery (49).

Images