Anti-winding protective fence mechanism for cleaning ship propeller

Abstract

The invention discloses an anti-winding protective fence mechanism for a cleaning ship propeller, and belongs to the technical field of ship propeller protection. The mechanism aims at solving the problem that an existing fixed protective fence is prone to being wound and blocked by flexible sundries. According to the main technical scheme, the crushing device comprises symmetrically arranged L-shaped baffles, a connecting shaft arranged between the L-shaped baffles, a mounting plate and a plurality of groups of crushing units composed of crushing shafts and crushing cutters, the thruster part comprises a protection plate, a transmission shaft and a propeller. The key point is that a first worm is fixed on the transmission shaft, and a first worm gear meshed with the first worm is fixed on the connecting shaft; a plurality of second worms are further fixed to the connecting shaft, and each second worm is meshed with a second worm wheel fixed to the upper end of the smashing shaft. The device realizes the fundamental conversion from passive interception to active removal, and has the advantages of good anti-winding effect, reliable structure, no need of extra power and simplicity and convenience in maintenance.

Description

Technical Field

[0001] This invention relates to the field of waterway cleaning vessel technology, and in particular to an anti-winding protective fence mechanism for a cleaning vessel propeller. Background Technology

[0002] Specialized vessels performing cleaning, salvage, and rescue missions in lakes, rivers, and ports often operate in environments filled with various flexible floating debris such as aquatic plants, fishing nets, ropes, and plastic bags. These debris can easily entangle the vessel's propellers, causing a sharp decline in propulsion efficiency, increased fuel consumption, and intensified vibration. In severe cases, it can lead to engine overload and shutdown or damage to the drive shaft, affecting not only cleaning efficiency but also posing a serious threat to the vessel's navigation safety and mission execution.

[0003] Currently, common protective measures mainly involve installing fixed grilles or guardrails around the propeller. While these static protective structures can block some large debris, flexible materials such as weeds and thin ropes are more likely to adhere to and accumulate on the grilles, eventually forming dense tangles that block the water intake channels. Their protective effect is limited and can create new blockage problems. Furthermore, once entanglement occurs, the vessel must be stopped for tedious manual cleaning by divers or using tools, which is time-consuming and labor-intensive, severely impacting the vessel's availability and operational continuity. Therefore, there is an urgent need for a protective mechanism that can actively prevent entanglement, possess self-cleaning capabilities, and does not affect propulsion efficiency. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of existing static protective barriers that are prone to clogging and require frequent cleaning, and to provide an anti-entanglement protective barrier mechanism for clean ship propellers. This mechanism can utilize the rotational power of the propeller itself to drive the cutting components to actively pulverize potentially entangled debris, changing passive interception to active elimination, thereby effectively preventing entanglement and ensuring the continuous, efficient, and safe operation of the propeller.

[0005] To achieve the above objectives, the present invention provides the following technical solution: In a first aspect, the present invention provides an anti-winding protective barrier mechanism, comprising: L-shaped baffles, wherein the L-shaped baffles are symmetrically arranged; A connecting shaft is rotatably connected between L-shaped baffles; Mounting plate, which is fixedly connected between L-shaped baffles; Several crushing shafts are rotatably connected to the lower surface of the mounting plate, and each crushing shaft has a crushing blade fixedly connected to its bottom end; Several second worm gears are fixedly connected to the crushing shaft; Several second worm gears are fixedly connected to the connecting shaft at positions corresponding to the second worm wheel.

[0006] Preferably, the L-shaped baffle has several through holes. This design helps to reduce water flow resistance and allows some small debris to pass through, avoiding the entire load acting on the crushing system.

[0007] Preferably, the L-shaped baffle is fixedly connected with a plurality of fixing plates for fixing to the hull.

[0008] Preferably, the second worm gear meshes with the corresponding second worm.

[0009] Preferably, a first worm gear is fixedly connected at the middle position of the connecting shaft.

[0010] Secondly, the present invention provides a clean boat propulsion device based on the aforementioned anti-entanglement protective grid mechanism.

[0011] Preferred, including: The protective plates are symmetrically arranged and fixedly connected to the rear side of the corresponding L-shaped baffles; A connecting plate, which is fixedly connected between the protective plates; A drive shaft is rotatably connected to a protective plate, and a propeller is fixedly connected to the rear end of the drive shaft.

[0012] Preferably, connecting rods are fixedly connected to the upper and lower sides of the protective plates.

[0013] Preferably, a first worm gear is fixedly connected at the middle position of the drive shaft.

[0014] Preferably, the first worm is meshed with the first worm wheel.

[0015] Compared with the prior art, the beneficial effects of the present invention are: Through a clever worm gear transmission system, part of the propeller's rotational power is converted into the cutting power of the shredder. The shredder forms a high-speed rotating cutting net in front of the propeller, which can actively cut up the water plants, ropes and other debris it comes into contact with into small pieces, so that they can be washed away by the water flow, thus fundamentally avoiding the formation and accumulation of entanglement. The entire crushing drive system relies entirely on the propeller's own power, without the need for independent motors, hydraulic systems, or control systems. It has a simple structure, high reliability, and does not increase the ship's energy consumption. It adopts a two-stage worm gear transmission with a large reduction ratio, which can convert the high-speed rotation of the propeller into a relatively low-torque rotation of the crushing blades, ensuring that the cutting process can handle tougher debris. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a rear view of the present invention; Figure 3 This is a schematic diagram of the first worm gear and the first worm shaft structure of the present invention; Figure 4 This is a front view of the present invention; Figure 5 This is a bottom view of the present invention.

[0017] In the diagram: 1. L-shaped baffle; 2. Through hole; 3. Protective plate; 4. Connecting rod; 5. Connecting plate; 6. Drive shaft; 7. Propeller; 8. Connecting shaft; 9. Mounting plate; 10. Crushing shaft; 11. Crushing blade; 12. Fixing plate; 13. First worm gear; 14. First worm; 15. Second worm; 16. Second worm gear. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figure 1-5 This invention provides a technical solution: an anti-winding protective grid mechanism for a clean ship propeller, comprising two symmetrically arranged L-shaped baffles 1, a connecting shaft 8, a mounting plate 9, and multiple crushing units connected between the two L-shaped baffles 1. A protective plate 3 is fixed behind the L-shaped baffles 1, and a drive shaft 6 and a propeller 7 are arranged between the protective plates 3.

[0020] In this embodiment, a protective grid consisting of multiple sets of rotating shredders 11 is installed in front of the propeller 7, and the propeller 7 itself drives these shredders 11 to rotate in the opposite direction. When weeds, ropes, and other debris approach with the water flow, they are first cut and shredded by the high-speed rotating shredders 11, thus preventing them from tangling and accumulating on the propeller at the source, ensuring the cleaning vessel's continuous operation capability in complex waters.

[0021] To transmit power from the propeller 7 to the shredder assembly 11, this device employs the following technical solution: a first worm gear 14 is fixedly installed in the middle section of the drive shaft 6. A first worm wheel 13, meshing with the first worm gear 14, is fixedly installed in the middle section of the connecting shaft 8 located in front of the propeller 7. When the drive shaft 6 drives the propeller 7 to rotate, the first worm gear 14 drives the first worm wheel 13, thereby driving the entire connecting shaft 8 to rotate.

[0022] The power transmission direction is changed by a single-stage worm gear drive, and the power is transferred from the rear propeller 7 to the front protective area, providing a power source for the crusher blade 11.

[0023] To achieve synchronous, high-torque rotation of multiple sets of crushing blades 11 for effectively crushing tangled materials, this device employs the following technical solution: A second worm gear 15 is fixedly installed on the connecting shaft 8, corresponding to the position above each crushing shaft 10. A second worm wheel 16 is fixedly installed at the upper end of each crushing shaft 10, meshing with the upper second worm gear 15. The lower end of the crushing shaft 10 passes through the mounting plate 9 and is fixedly fitted with the crushing blades 11.

[0024] The connecting shaft 8 drives multiple second worm gears 15 to rotate synchronously, and each second worm gear 15 drives the corresponding second worm wheel 16 and crushing shaft 10 to rotate. The two-stage worm gear transmission further increases the reduction ratio, ensuring that the crushing blade 11 has sufficient cutting torque at a lower speed, which can effectively handle tough debris.

[0025] To achieve stable installation, reduce water flow resistance, and facilitate maintenance, this device employs the following technical solution: Multiple through holes 2 are provided on the vertical surface of the L-shaped baffle 1. A fixing plate 12 is welded to the back of the L-shaped baffle 1, used to install the entire protective mechanism onto the stern plate or rudder plate of the ship using bolts. The protective plates 3 are reinforced with connecting plates 5 and upper and lower connecting rods 4, forming a rigid protective frame.

[0026] The through-hole 2 effectively diverts part of the water flow, reducing the obstruction effect of the protective mechanism. The mounting plate 12 provides a reliable and detachable connection. The protective frame enhances the rigidity of the entire tail structure, protects the drive shaft 6 and propeller 7 from external impacts, and places all transmission components in a location that allows for easy maintenance.

[0027] The working principle and usage of this invention are as follows: When the cleaning vessel starts normally and the propeller is working, the rotational power of the propeller 7 drives the connecting shaft 8 to rotate through the meshing of the first worm 14 and the first worm wheel 13. The rotation of the connecting shaft 8 is then transmitted to each of the meshing second worm wheels 16 through multiple second worms 15 on it, thereby driving all the crushing shafts 10 and the crushing blades 11 to rotate synchronously. The rotating crushing blades 11 form a dynamic cutting barrier in front of the propeller inlet, crushing the incoming debris in real time. The crushed debris is discharged with the water flow through the gaps in the protective grid and cannot reach the propeller 7. The entire protection process is automatic and continuous. As long as the propeller is working, the protection function is effective, thus ensuring that the propeller can operate continuously without entanglement.

[0028] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An anti-tangle protective fence mechanism, characterized in that, include: L-shaped baffles (1), wherein the L-shaped baffles (1) are symmetrically arranged; A connecting shaft (8) is rotatably connected between L-shaped baffles (1); Mounting plate (9), which is fixedly connected between L-shaped baffles (1); Several crushing shafts (10) are rotatably connected to the lower surface of the mounting plate (9), and each crushing shaft (10) is fixedly connected to a crushing blade (11) at its bottom end. Several second worm gears (16) are fixedly connected to the crushing shaft (10); Several second worm gears (15) are fixedly connected to the connecting shaft (8) at positions corresponding to the second worm wheel (16).

2. The anti-winding protective fence mechanism according to claim 1, characterized in that: The L-shaped baffle (1) has several through holes (2).

3. The anti-winding protective fence mechanism according to claim 1, characterized in that: The L-shaped baffle (1) is fixedly connected with several fixing plates (12) for fixing to the hull.

4. The anti-winding protective fence mechanism according to claim 1, characterized in that: The second worm gear (16) meshes with the second worm (15).

5. The anti-winding protective fence mechanism according to claim 1, characterized in that: The first worm gear (13) is fixedly connected at the middle position of the connecting shaft (8).

6. A clean-boat propulsion device, characterized in that, It is based on an anti-winding protective fence mechanism according to any one of claims 1 to 5.

7. A clean-boat propulsion device according to claim 6, characterized in that, include: Protective plates (3) are symmetrically arranged and fixedly connected to the rear side of the corresponding L-shaped baffles (1); Connecting plate (5), which is fixedly connected between protective plates (3); The drive shaft (6) is rotatably connected to the protective plate (3), and a propeller (7) is fixedly connected to the rear end of the drive shaft (6).

8. A clean-ship propulsion device according to claim 7, characterized in that: Connecting rods (4) are fixedly connected to the upper and lower sides of the protective plates (3).

9. A clean-boat propulsion device according to claim 8, characterized in that: The first worm gear (14) is fixedly connected at the middle position of the drive shaft (6).

10. A clean-ship propulsion device according to claim 9, characterized in that: The first worm (14) is meshed with the first worm wheel (13).

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