Large FPP fixed pitch propeller structure

Abstract

The utility model discloses a large FPP fixed pitch propeller structure, and particularly relates to the technical field of propeller devices.The large FPP fixed pitch propeller structure comprises a propeller hub, blade positioning grooves are formed in the outer surface of the propeller hub, threaded holes are formed in the blade positioning grooves, the propeller hub is exquisite in design, the blade positioning grooves provide accurate installation positions for blades, the rotation stability is enhanced, and the blade positioning grooves are matched with the threaded holes. Threaded holes facilitate fixation of the paddles through threaded connecting pieces, the mounting and dismounting processes are simplified, the three paddles are evenly distributed and serve as main thrust components, a vehicle is rotationally pushed to advance, it is ensured that the propelling force is balanced and efficient, a complex pitch changing mechanism is not needed after the paddles are mounted, and the structure is relatively simple; power of an engine is transmitted to the propeller hub and the propeller blades to drive the propeller hub and the propeller blades to rotate. The connecting strength of the tail shaft and the propeller hub is enhanced through the connecting disc, stable connection is guaranteed through the evenly-distributed bolts, loosening or falling off during high-speed rotation is prevented, and the overall safety and reliability are improved.

Description

Technical Field

[0001] This utility model relates to the field of propeller device technology, and more specifically, to a large FPP fixed-pitch propeller structure. Background Technology

[0002] FPP fixed-pitch propellers have been widely used in small-power light aircraft and ships due to their advantages such as simple structure, light weight and low cost.

[0003] A search revealed that patent publication number CN216301436U discloses an energy-saving fixed-pitch propeller, including a mounting block. The mounting block is equipped with fixing components on all four sides, and a propulsion component is provided on the other side of the fixing components. This novel solution obtains spiral propulsion force by torsionally driving the propulsion component. Through the interaction of forces, under the limiting action of the top block, the two sets of semicircular blocks run in opposite directions and are locked into the inner cavity of the slot, thereby completing the installation operation.

[0004] Existing propellers have limitations in use because their blades are often fixed and cannot be flexibly disassembled or replaced according to different working conditions, thus affecting their optimal performance.

[0005] Therefore, a large FPP fixed-pitch propeller structure is proposed to address the above problems. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a large FPP fixed-pitch propeller structure to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a large FPP fixed-pitch propeller structure, including a hub, a blade positioning groove is formed on the outer surface of the hub, a threaded hole is formed inside the blade positioning groove, a blade is detachably installed inside the hub, the number of blades is three, a stern shaft is connected to one side of the hub, a connecting plate is provided on the side of the stern shaft near the hub, bolts are threadedly installed on the upper side of the connecting plate, and the bolts are evenly arranged on the upper side of the connecting plate.

[0008] Preferably, the blade is divided into a blade surface and a blade back.

[0009] Preferably, a blade positioning plate is provided on the side of the blade near the blade positioning groove, and a positioning screw is threaded onto the upper side of the blade positioning plate.

[0010] Preferably, the head of the propeller hub is provided with a rectifier cap, and the upper side of the rectifier cap is provided with a through hole.

[0011] Preferably, a sealing gasket is installed on the side of the leaf positioning plate that is close to the connecting plate.

[0012] Preferably, the propeller hub and the connecting disc are positioned using the stern shaft.

[0013] The technical effects and advantages of this utility model are as follows:

[0014] Compared to existing technologies, this large FPP fixed-pitch propeller structure features a sophisticated hub design. The blade positioning grooves provide precise installation positions for the blades and enhance rotational stability. Threaded holes facilitate blade fixation via threaded connectors, simplifying the installation and disassembly process. The three evenly distributed blades, as the primary thrust components, rotate to propel the vehicle forward, ensuring balanced and efficient propulsion. After blade installation, no complex pitch-changing mechanism is required, resulting in a relatively simple structure.

[0015] Compared with existing technologies, this large FPP fixed-pitch propeller structure uses the stern shaft as the key power transmission point to transmit engine power to the propeller hub and blades, driving their rotation. The connecting disc strengthens the connection between the stern shaft and the propeller hub, and the evenly distributed bolts ensure a stable connection, preventing loosening or detachment during high-speed rotation, thus improving overall safety and reliability. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model.

[0017] Figure 2 This is a three-dimensional structural diagram of the other side of this utility model.

[0018] Figure 3 This is a schematic diagram of the connection between the propeller hub and the stern shaft of this utility model.

[0019] The attached diagram is labeled as follows: 1. Propeller hub; 2. Blade positioning groove; 3. Threaded hole; 4. Propeller blade; 5. Blade positioning plate; 6. Regulator cap; 7. Through hole; 8. Stern shaft; 9. Connecting plate; 10. Bolt. Detailed Implementation

[0020] 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.

[0021] Example 1

[0022] As attached Figures 1 to 3The large FPP fixed-pitch propeller structure shown includes a hub 1, with blade positioning grooves 2 on the outer surface of the hub 1 and threaded holes 3 inside the blade positioning grooves 2. Blades 4 are detachably installed inside the hub 1, and there are three blades 4. A stern shaft 8 is connected to one side of the hub 1, and a connecting plate 9 is provided on the side of the stern shaft 8 near the hub 1. Bolts 10 are threadedly installed on the upper side of the connecting plate 9, and the bolts 10 are evenly distributed on the upper side of the connecting plate 9.

[0023] Among them, the hub 1 is ingeniously designed. The blade positioning groove 2 on its outer surface not only provides a precise installation position for the blade 4, but also enhances the stability of the blade 4 during rotation. The threaded hole 3 allows the blade 4 to be firmly fixed in the blade positioning groove 2 through the threaded connector, which is convenient for installation and disassembly, maintenance and replacement. The three blades 4 are evenly distributed around the hub 1. The blade 4 is the main part of the propeller that generates thrust. It propels the vehicle forward by rotating in the water, ensuring balanced and efficient propulsion. After the blade 4 is installed and fixed, there is no need for a complicated pitch-changing mechanism, so the structure is relatively simple.

[0024] As a key component for power transmission, the stern shaft 8 transmits the engine's power to the propeller hub 1 and the propeller blades 4, driving them to rotate. The connecting plate 9 strengthens the connection between the stern shaft 8 and the propeller hub 1, while the evenly distributed bolts 10 further ensure the stability of the connection, preventing loosening or falling off during high-speed rotation, thus improving overall safety and reliability.

[0025] Example 2

[0026] Based on Embodiment 1, the solution in Embodiment 1 will be further described in detail below with reference to the specific working method, such as... Figures 1 to 3 As shown below, see details:

[0027] In a preferred embodiment, the blade 4 is divided into a blade surface and a blade back; further, the blade 4 is divided into a blade surface and a blade back. The blade surface is the side of the blade facing the incoming flow, and is designed to be relatively smooth to optimize the flow of water, reduce resistance and improve propulsion efficiency; the blade back faces the hub, and its shape is complex. It forms a specific profile with the blade surface, which helps to generate sufficient lift and thrust when rotating to propel the ship forward.

[0028] In a preferred embodiment, a blade positioning plate 5 is provided on the side of the blade 4 near the blade positioning groove 2, and a positioning screw is threaded on the upper side of the blade positioning plate 5. Furthermore, the blade positioning plate 5 is embedded in the blade positioning groove 2 to ensure the accuracy of the blade 4 installation. The positioning screw is threaded on the upper side of the blade positioning plate 5. By tightening the positioning screw, the blade 4 can be firmly locked in the blade positioning groove 2 to prevent shaking or falling off during high-speed rotation, thereby further improving the stability and safety of the blade 4.

[0029] In a preferred embodiment, the head of the propeller hub 1 is provided with a flow rectifier cap 6, and the upper side of the flow rectifier cap 6 is provided with a through hole 7. Furthermore, the flow rectifier cap 6 is provided at the head of the propeller hub 1 to optimize the flow pattern of water when passing through the propeller hub and reduce the resistance during rotation. The through hole 7 on the upper side of the flow rectifier cap 6 not only helps to balance the water pressure inside and outside the propeller hub, but also guides the water flow to pass through the propeller hub more smoothly, further improving the propulsion efficiency and reducing energy consumption.

[0030] In a preferred embodiment, a sealing gasket is installed on the side of the blade positioning plate 5 that is close to the connecting plate 9; furthermore, the sealing gasket installed on the side of the blade positioning plate 5 that is close to the connecting plate 9 ensures the sealing of the connection between the blade 4 and the hub 1 and the stern shaft 8, and is used to prevent water or other liquids from seeping into the hub 1, causing damage or affecting performance, avoiding corrosion or affecting the connection strength, thereby ensuring the stability and durability of the entire propulsion system.

[0031] In a preferred embodiment, the propeller hub 1 and the connecting disc 9 are positioned using the stern shaft 8; furthermore, the propeller hub 1 and the connecting disc 9 are precisely positioned together via the stern shaft 8. The stern shaft 8, as the central shaft, not only transmits power but also ensures the coaxiality of the propeller hub 1 and the connecting disc 9 during installation, avoiding vibration and noise caused by misalignment, improving the operational stability of the entire propulsion system, and extending the service life of the components.

[0032] The working process of this utility model is as follows: When in use, this large FPP fixed-pitch propeller device shows significant advantages. Since the installation angle of its blades 4 is fixed, there is no need to equip it with a complex pitch-changing mechanism, which makes its overall structure relatively simple. This not only improves the reliability of the equipment, but also reduces potential failure points. As a key component, the hub 1 is usually made of high-strength materials and has a large diameter to ensure that it can withstand the huge torque and thrust generated when the blades rotate. This simplification of the structure not only helps to reduce the overall weight of the propeller, but also further reduces manufacturing and maintenance costs, making maintenance work simpler and faster. In addition, the propeller is extremely efficient and can maximize the effective power of the engine, thereby improving the overall performance.

Claims

1. A large FPP fixed pitch propeller configuration comprising a propeller hub (1), characterized in that: The outer surface of the propeller hub (1) is provided with a blade positioning groove (2), and the inside of the blade positioning groove (2) is provided with a threaded hole (3). The propeller hub (1) is detachably installed with a propeller blade (4), and there are three propeller blades (4). A stern shaft (8) is connected to one side of the propeller hub (1). A connecting plate (9) is provided on the side of the stern shaft (8) near the propeller hub (1). Bolts (10) are threadedly installed on the upper side of the connecting plate (9). The bolts (10) are evenly arranged on the upper side of the connecting plate (9).

2. A large FPP fixed pitch propeller structure according to claim 1, characterized in that: The blade (4) is divided into a blade surface and a blade back.

3. A large FPP fixed pitch propeller structure according to claim 2, characterized in that: The blade (4) is provided with a blade positioning plate (5) on the side near the blade positioning groove (2), and a positioning screw is threaded on the upper side of the blade positioning plate (5).

4. A large FPP fixed pitch propeller structure according to claim 2, characterized in that: The head of the propeller hub (1) is provided with a rectifier cap (6), and the upper side of the rectifier cap (6) is provided with a through hole (7).

5. A large FPP fixed pitch propeller structure according to claim 3, characterized in that: A sealing gasket is installed on the side of the leaf positioning plate (5) that is close to the connecting plate (9).

6. A large FPP fixed pitch propeller structure according to claim 4, characterized in that: The propeller hub (1) and the connecting plate (9) are positioned by the stern shaft (8).

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