18 results about "Folding propeller" patented technology

The invention provides a water-air two-domain self-adaptive state switching efficient propelling folding propeller, which comprises a propeller hub, a propeller blade, a propeller blade, a propeller blade and a propeller blade, the N fixed paddles are uniformly distributed on the side wall of the cylinder in the circumferential direction; the inner sides of the fixed paddles are fixedly connected with the outer surface of the side wall of the cylinder; the fixed blades are arranged along the water pushing direction; the outer side of the fixed paddle is bent upwards, and a connecting plate is arranged at the end part of the outer side; the N folding and unfolding paddles are correspondingly mounted at the outer ends of the fixed paddles, and each folding and unfolding paddle comprises a blade and a root ring fixedly connected with the root of the blade; the N rotating joints comprise pin shafts, and the pin shafts penetrate through the connecting holes and the root ring; wherein N is greater than or equal to 3; when the propeller hub rotates and is located above the water surface, the folding and unfolding blades are unfolded under the action of centrifugal force; and when the paddle is located below the water surface, the folding and unfolding paddle is folded under the action of water resistance. The efficient propelling folding paddle has sufficient propelling power in water and is high in water-air transition efficiency. The invention also provides an unmanned aerial vehicle equipped with the efficient propelling folding paddle.

The utility model discloses a folding paddle assembly and an unmanned aerial vehicle, and belongs to the technical field of unmanned aerial vehicles. The folding paddle assembly comprises a paddle blade, a paddle clamp, a wear-resistant part and an elastic part, the paddle blade comprises a mounting part and a main body part connected with the mounting part, the mounting part is rotationally connected to the paddle clamp, the wear-resistant part is clamped between the paddle clamp and the mounting part, and the elastic part is elastically supported between the wear-resistant part and the paddle clamp; a limiting structure is arranged at the position, close to the mounting part, of the main body part; when the paddle rotates relative to the paddle clamp, the limiting structure can abut against the paddle clamp so as to limit the rotation range of the paddle. According to the folding paddle assembly, the paddles are convenient to install, rotation of the paddles can be achieved without adjusting the locking force of the paddle clamps, the locking force is high and firm, and the problems that the paddles are prone to vibration and screws are loosened in the using process of the unmanned aerial vehicle are solved.

1. Name of the product in this design: Paddle Clip (HEPF30). 2. Purpose of this design: For the fixed installation of folding propeller blades. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

The invention discloses a multi-rotor manned flight simulator based on a Stewart platform, and belongs to the technical field of rotor unmanned aerial vehicles. The multi-rotor manned flight simulator based on the Stewart platform comprises a rotor unmanned aerial vehicle body, the rotor unmanned aerial vehicle body comprises a rack, first servo motors and folding propellers, and four sets of servo motors are symmetrically and fixedly distributed on the side face of the rack; the three-degree-of-freedom parallel mechanism comprises a fixed platform, a movable platform and driving branch chains, the fixed platform is fixedly connected to the lower side of the rack, and the fixed platform and the movable platform are hinged through a plurality of driving branch chains; the driving branch chain comprises a second servo motor, a ball screw and a telescopic rod. The second servo motor is fixedly connected to the lower side of the fixed platform and connected with the ball screw through a coupler. And the manned cabin is rotationally connected to the lower portion of the movable platform and used for bearing passengers, and the stability and riding comfort of the cabin are remarkably improved by means of the active control characteristic of the Stewart platform.

The invention relates to the technical field of ship propeller testing, in particular to an integrated testing device for a foldable propeller, which comprises a hollow propeller hub with a plurality of mounting holes uniformly distributed in the surface along the circumferential direction, and a folding device for the propeller is arranged in the hollow propeller hub. The folding device is correspondingly connected with blades extending out of the hollow propeller hub through each mounting hole, an energy recovery device integrally connected with the folding device is arranged in the propeller hub transition section, and the propeller hub transition section is connected with a load testing device through a fixing frame transition section. The propeller folding device, the load testing device and the energy recovery device are integrated into a whole, the trim angle of the folding propeller is adjustable, hydrodynamic testing is carried out in different tilt angle states, and the hydrodynamic testing range is widened. In the propelling process of the propeller, kinetic energy is converted into electric energy and stored, energy recovery and power generation are achieved, and the application potential and value of the foldable propeller are greatly expanded.

The present invention relates to an air-land-water flight vehicle. Within a main frame, the front and rear ends of an upper frame are provided with propeller compartments for placement of folding propeller assemblies, a parachute compartment being provided between the folding propeller compartments; the front section of a lower frame is provided with a control cabin for piloting and loading of passengers and cargo, two sides of the middle rear section of the lower frame are provided with wing compartments for placement of retractable folding wing assemblies, two rear sides of the rear section of the lower frame are respectively provided with storage compartments, an integrated compartment being provided between the storage compartments, and a balloon compartment for placement of a balloon deployment and retraction system is provided below the middle of the lower frame; the folding propeller assemblies are mounted on the main frame, the retractable folding wing assemblies are symmetrically mounted on two sides at the rear of the main frame by means of connecting structures, and traveling wheels are provided below the main frame. The air-land-water fight vehicle has a compact structure, can travel and park on land and water and can perform vertical take-off and landing on land and water, and can change the form in mid-air; the flight vehicle is an electric flight vehicle that maintains long endurance with a certain payload, and ensures safe flight.

The invention discloses an umbrella-shaped folding ground effect aircraft which comprises an umbrella-shaped folding propeller made of flexible materials or rigid materials, a main driving device is installed on propeller blades, and blade connecting and fixing rings supported by elastic frameworks are arranged on the outer sides of the propeller blades, or rigid multi-wing centrifugal machine fan-shaped blade connecting and fixing rings are arranged on the inner sides and the outer sides of the propeller blades. The connecting and fixing ring blade is provided with a groove type jet engine nozzle or an electric rotor wing type auxiliary driving device, the multi-wing centrifugal machine fan-shaped blade connecting and fixing ring is conical, the conical centrifugal machine fan-shaped blade connecting and fixing ring is connected with a turbine pump or a center shaft, and the propeller blade is connected with an upper tray and a lower tray of the center shaft through an umbrella type framework. A turbine pump or other energy supply devices are installed on the center shaft, a safety air bag is arranged on the lower portion of the lower tray, the center shaft is connected with a load cabin, a tail vane of the load cabin is a telescopic rod, and a pushing device for controlling the direction such as a jet engine or an electric rotor wing is installed at the tail of the telescopic rod.

The present invention relates to a propeller device of an airborne mobile body, which is arranged to fold the propeller when the airborne mobile body falls, thereby preventing additional accidents caused by fragments resulting from the propeller hitting the ground, and enabling the propeller to be reused by unfolding the folded propeller after the airborne mobile body lands.

The invention belongs to the technical field of aircrafts, and particularly relates to a folding propeller with conformal propeller blades and propeller hubs, which is characterized in that the center-of-gravity position of each propeller blade is set, and the mass of each single propeller blade and the distance from the center-of-gravity of each propeller blade to the rotation center are designed; the aerodynamic force thrust and the component force in the negative direction of the normal of the centripetal force of the propeller blade are equal and opposite in direction, so that the blade deformation caused by the thrust is compensated, the center line of the propeller blade can coincide with the rotating plane, and at the moment, the propeller blade and the propeller hub form a complete integrated propeller. According to the folding propeller, the appearance and the structure of the propeller blades are designed, so that the gravity center deviates from a rotating plane and deviates towards the thrust direction by a certain distance, the axial aerodynamic force and the axial component force of centrifugal force borne by the propeller blades during rotation are balanced, the folding propeller is in a design point state during working, the efficiency of the propeller is improved, and the propeller is more stable during rotation.

The application discloses a dual-speed-ratio water-air dual-purpose power device, which mainly comprises a power input device, a rotating speed switching device and a paddle. The power input device provides power in a high rotating speed and low torque state under different media, and the rotating speed switching device converts the power input into torque meeting the requirement of the medium under different media through a one-way bearing and a planetary reduction mechanism. When the power unit is in the air, the planetary reduction mechanism loses the effect, the output of the rotating speed switching device is equal to the rotating speed and torque of the power input device, when the power unit is in the water, the planetary reduction mechanism operates, the output rotating speed of the rotating speed switching device is less than the rotating speed of the power input device, and the output torque of the rotating speed switching device is greater than the torque of the power input device. The output shaft of the rotating speed switching device drives a passive folding propeller to provide power, and the passive folding propeller is passively stretched and folded according to the rotating speed and the different media, so that the efficiency under different media is ensured.

A propeller with folding blades for the propulsion of a mobile vehicle inside a fluid is provided having a movement mechanism rotatable around a central rotation axis of the propeller; and a plurality of blades. Each blade has a root end connected to the movement mechanism by a gear to allow the movement of the blade from an opening position to a closed position and vice versa, wherein in the closed position the plurality of blades are configured to form a continuous solid in the form of a spindle wherein a leading edge of a first blade (S′) is configured to osculate a trailing edge of a second blade following the first blade (S′) in such a way as to form a continuous surface between the first blade (S′) and the second blade (S″).

Foldable propeller for air mobility, wherein the foldable propeller includes: a shaft (100) with a hub (500) at an upper end section of the shaft (100); Blades (700), each of which is attached to the hub (500) via a rotating shaft (710) in order to be rotated with the hub (500) or to be rotated relative to the hub (500); a movable section (300) which is slidably mounted on the shaft (100); and a link arrangement (900) with a plurality of links (910, 920, 930, 940) connecting the movable section (300) and the vane blades (700) and enabling the vane blades (700) to be rotated around the hub (500) while the movable section (300) slides along the shaft (100) such that the vane blades (700) are folded towards each other or folded away from each other, wherein the plurality of members (910, 920, 930, 940) comprises a first member (910) and a second member (920), and wherein a first end section of the first member (910) is pivotably connected to the movable section (300) and a first end section of the second member (920) is pivotably connected to a point on the shaft (100) between the movable section (300) and the hub (500).

The invention discloses a driving device for a folding propeller of an unmanned aerial vehicle, and relates to the technical field of propellers, the driving device comprises blades, a first folding assembly, a second folding assembly and a propeller arm folding mechanism, the first folding assembly comprises a rotating shaft, an H-shaped frame, a mounting block, a lower clamping arm and an upper clamping arm, and the blades are fixedly mounted between the upper clamping arm and the lower clamping arm; a first folding driving part is arranged between the lower clamping arm and the H-shaped frame; the first folding driving part drives the paddle to be adjusted from a horizontal state to a vertical state; the second folding assembly comprises a mounting flange and a clamping cylinder, a second folding driving part is arranged between the clamping cylinder and the mounting flange, and the second folding driving part drives the rotating shaft to be adjusted to the horizontal state from the vertical state; the paddles are sequentially adjusted to be in the vertical state and the horizontal state through the first folding assembly and the second folding assembly, then the paddles are combined with the paddle arm folding mechanism to be recycled to the edge of the rack, and finally the space occupancy rate after the paddles are folded is further reduced through the dislocation mechanism.

The invention relates to a folding propeller assembly and an unmanned aerial vehicle. The folding propeller assembly comprises a propeller clamp and a propeller, the paddle is rotatably clamped between the paddle clamps so as to selectively have a folding position and an unfolding position; the adjusting assembly is arranged between the paddle and the paddle clamp and is used for dynamically adjusting the clamping force of the paddle clamp to the paddle; wherein the adjusting assembly comprises a hollow air bag structure, and the hollow air bag structure is used for providing elastic clamping force for the paddle; or the adjusting assembly comprises a magnetic piece, and the magnetic piece is used for providing magnetic clamping force for the paddle. According to the technical scheme, the rotating friction force of the paddles can be adjusted in a unified mode through the folding paddle assembly.

The utility model relates to the technical field of testing devices, and discloses a simple folding propeller tension and power testing device which comprises a first fixing frame and a second fixing frame, the top end of the first fixing frame is provided with a tension tester, the inner side of the first fixing frame and the inner side of the second fixing frame are fixedly connected with transverse plates, and the transverse plates are fixedly connected with the first fixing frame and the second fixing frame. A plurality of folding assemblies are arranged between the side end of the bottom of the first fixing frame and the side end of the bottom of the second fixing frame, the top end of each folding assembly is provided with a limiting assembly used for fixing the corresponding folding assembly, and a translation assembly is arranged between the side end of the top of the first fixing frame and the side end of the top of the second fixing frame. According to the propeller tension and power testing device, through the arrangement of the folding assembly, the limiting assembly and the translation assembly, folding of the propeller tension and power testing device is achieved, the overall size of the testing device is reduced, the propeller tension and power testing device is convenient to carry by people, and the working efficiency is improved.

The present application relates to the field of paddle forming die, especially to a folding propeller paddle forming die and its using method, the forming die comprises an upper die seat and a lower die seat, the upper end of the lower die seat is provided with multiple groups of cavities side by side, each group of cavities comprises a pair of center-symmetrically arranged paddle cavities, the paddle cavities of each group are communicated through a first channel, the surface of the lower die seat is provided with a second channel, the two ends of the second channel are provided with control seats for controlling the opening and closing state between the first channel and the second channel, the control seat is provided with a connecting channel in the center, and one end of the connecting channel is communicated with the first channel. The present application can realize the synchronous forming of multiple groups of paddles, improve the efficiency of hot pressing forming, and ensure that the forming environment of the left paddle and the right paddle is the same based on the same molten flowing resin, thereby ensuring that the structural strength of the left paddle and the right paddle remains highly consistent, and avoiding the influence on use due to the strength difference of the paddles.

1. Name of the product in this design: Flat Paddle Mount (Dynamic Balance Adjustment Folding Mount). 2. Purpose of this design: An adjustable, dynamically balanced, folding propeller mount for model aircraft. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D rendering 1.

1. Name of the product in this design: Folding Propeller Folding Arm Drone. 2. Intended use of this design: for use in unmanned aerial vehicles (UAVs). 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.