Variable pitch propeller structure of unmanned aerial vehicle

Abstract

The utility model discloses a variable pitch propeller structure of an unmanned aerial vehicle, which relates to the field of unmanned aerial vehicle structures and comprises a propeller mounting seat, the bottom end of the propeller mounting seat is connected with a telescopic propeller shaft structure, and propeller blades are arranged on the periphery of the propeller mounting seat; the ends, close to the propeller mounting base, of the propeller blades are connected with propeller blade adjusting shafts, the ends, close to the propeller mounting base, of the propeller blade adjusting shafts are connected with the propeller mounting base, and the propeller blade adjusting shafts are further connected with limiting clamping rings. The outer wall of the limiting clamping ring is connected with an upper limiting clamp and a lower limiting clamp through bolts, and the lower limiting clamp is used for being connected with a propeller mounting base. According to the propeller structure, the included angle (pitch) between the rotating plane of the propeller blades of the propeller structure and airflow can be adjusted according to needs, so that the propeller system optimizes thrust and efficiency in different flight states, and the unmanned aerial vehicle can adapt to different environments.

Description

TECHNICAL FIELD

[0001] The utility model relates to unmanned plane structure field, concretely is a kind of unmanned plane variable pitch propeller structure. BACKGROUND

[0002] Unmanned plane is a kind of not carrying person aircraft by radio remote control or autonomous program control, is widely used in military, civilian field.According to use can be divided into military unmanned plane and civilian unmanned plane two big categories, former emphasis reconnaissance, strike etc.Tasks, latter covers aerial photography, agricultural monitoring, logistics transportation etc.Scenario.

[0003] The propeller of present use's civilian unmanned plane is all invariable, when flying, cannot satisfy different use demand, use environment has great limitation. CONTENT OF UTILITY MODEL

[0004] The utility model aims to realize by following technical scheme:

[0005] A kind of unmanned plane variable pitch propeller structure, including propeller mounting seat, the bottom end of the propeller mounting seat is liftably connected with the telescopic propeller shaft structure of telescopic setting, the periphery of the propeller mounting seat is rotatably adjusted and is provided with propeller blade;

[0006] The end of the propeller blade close to propeller mounting seat is connected with propeller blade adjusting shaft, the end of the propeller blade adjusting shaft close to propeller mounting seat is connected with propeller mounting seat by rotating bearing, limit snap ring is also connected on the propeller blade adjusting shaft, the outer wall of the limit snap ring is detachably connected with limit upper clamp and limit lower clamp by bolt, the limit lower clamp is used to be connected with propeller mounting seat, the bolt of the limit upper clamp and limit lower clamp is used to limit the rotation of propeller blade adjusting shaft.

[0007] Preferably, the telescopic propeller shaft structure includes screw connection shaft;

[0008] The bottom end of the screw connection shaft is connected with driving device for driving screw connection shaft to rotate, the top end of the screw connection shaft is provided with guide connection cylinder, and the top end of the screw connection shaft is provided with guide connection cylinder;

[0009] Telescopic adjusting hydraulic telescopic rod is provided in the guide connection cylinder, the bottom end of the hydraulic telescopic rod is used to be connected with the top end of the screw connection shaft that is arranged in the guide connection cylinder, and the other end of the hydraulic telescopic rod is telescopically movable and extends out from the top end of the guide connection cylinder, and is used to be connected with propeller mounting seat;

[0010] The cylinder shell of the hydraulic telescopic rod is used to be connected with the inner wall of the guide connection cylinder.

[0011] Preferably, the hydraulic telescopic rod is connected with a flange plate at one end close to the propeller mounting base, and the hydraulic telescopic rod is connected with the propeller mounting base through the flange plate.

[0012] Preferably, the output end rod body of the hydraulic telescopic rod is movably arranged on the protection spring, one end of the protection spring is connected with the inner wall of the guide connecting cylinder body, and the other end of the protection spring is connected with the bottom end of the flange plate.

[0013] Preferably, the driving device comprises a servo driving motor.

[0014] The output shaft of the servo driving motor is connected with a driving rotary pedestal, the driving rotary pedestal is rotatably connected with the outer shell of the servo driving motor through a bearing, and the driving rotary pedestal is driven to rotate by the servo driving motor.

[0015] Preferably, the driving rotary pedestal is connected with rotary connecting arms at two sides, respectively, and the other end of the rotary connecting arm is connected with the bottom end of the screw connecting shaft through a fixing seat.

[0016] The utility model discloses a beneficial effect is: the utility model discloses a kind of variable pitch propeller structure of unmanned aerial vehicle, the propeller structure is based on the original "fixed type" propeller structure, a series of design improvements are carried out;Through the propeller structure of this design improvement:

[0017] 1, the propeller structure can be adjusted according to needs, the included angle (pitch) between the rotation plane of propeller blade of propeller structure and airflow, so that the propeller system of optimizing thrust and efficiency under different flight states;

[0018] 2, the propeller structure can also adjust the height distance between propeller blade and unmanned aerial vehicle body, so as to indirectly realize the included angle (pitch) between the rotation plane of propeller blade and airflow, so as to adapt to different environments for unmanned aerial vehicle. DRAWINGS

[0019] Fig. 1 It is the whole connection effect schematic view of the utility model discloses a kind of variable pitch propeller structure of unmanned aerial vehicle;

[0020] Fig. 2 It is the connection structure schematic view of the utility model discloses a kind of variable pitch propeller structure of unmanned aerial vehicle;

[0021] In the drawing, 1-propeller mounting base, 2-propeller blade, 3-screw connecting shaft, 4-guide connecting cylinder body, 5-servo driving motor, 21-propeller blade adjusting shaft, 22-rotary bearing, 23-limiting snap ring, 51-driving rotary pedestal, 52-rotary connecting arm. DETAILED DESCRIPTION

[0022] In order to make the purpose of the utility model, the technical scheme and the advantage are more clear and obvious, the following combines the figure and the example, carries out the further detailed explanation to the utility model.

[0023] As Figs. 1-2 The utility model discloses a variable pitch propeller structure of unmanned plane, the propeller structure has carried out a series of design improvement on the basis of original "fixed type" propeller structure. The propeller structure includes propeller mounting seat 1, the bottom end of propeller mounting seat 1 is installed and is connected with the telescopic propeller shaft structure of telescopic setting, and the periphery of propeller mounting seat 1 is rotatably adjusted and is provided with propeller blade 2. The one end of propeller blade 2 close to propeller mounting seat 1 is connected with propeller blade adjusting shaft 21, and the one end of propeller blade adjusting shaft 21 close to propeller mounting seat 1 is rotatably connected with propeller mounting seat 1 through rotating bearing 22, and the outer wall of limit snap ring 23 on propeller blade adjusting shaft 21 is detachably connected with limit upper clamping hoop and limit lower clamping hoop through bolt, and limit lower clamping hoop is used to be connected with propeller mounting seat 1, and the bolt of limit upper clamping hoop and limit lower clamping hoop is used to rotatably limit propeller blade 2 adjusting shaft.

[0024] In the embodiment, by adjusting and controlling the relative height of the telescopic propeller shaft structure, the height between the propeller blade 2 and the unmanned plane body can be adjusted, so as to indirectly adjust (change) the included angle (pitch) between the rotation plane of the propeller blade and the airflow. At the same time, by adjusting and controlling the relative angle position of each propeller blade 2 and the propeller mounting seat 1, the included angle (pitch) between the rotation plane of the propeller blade and the airflow can be changed, so as to optimize the propeller system in different flight states and adapt the unmanned plane to different environments.

[0025] Further, the telescopic propeller shaft structure includes a screw connection shaft 3. The bottom end of the screw connection shaft 3 is connected with a driving device for driving the screw connection shaft 3 to rotate. The top end of the screw connection shaft 3 is provided with a guide connection cylinder 4, and the top end of the screw connection shaft 3 is arranged in the guide connection cylinder 4. A hydraulic telescopic rod is arranged in the guide connection cylinder 4 for telescopic adjustment. The bottom end of the hydraulic telescopic rod is connected with the top end of the screw connection shaft 3 arranged in the guide connection cylinder 4. The other end of the hydraulic telescopic rod is telescopically movable and extends out of the top end of the guide connection cylinder 4 and is arranged for connection with the propeller mounting seat 1. The cylinder body shell of the hydraulic telescopic rod is connected with the inner wall of the guide connection cylinder 4. It should be noted that the guide connection cylinder 4 is connected with the screw connection shaft 3, and the guide connection cylinder 4 plays a guiding protection role.

[0026] Meanwhile, the hydraulic telescopic rod is connected with a flange plate at one end close to the propeller mounting base 1, and the hydraulic telescopic rod is connected and fixed with the propeller mounting base 1 through the flange plate at one end close to the propeller mounting base 1. The output end rod body of the hydraulic telescopic rod is movably arranged on the protection spring, one end of the protection spring is used for being connected with the inner wall of the guide connecting cylinder body 4, and the other end of the protection spring is used for being connected with the bottom end of the flange plate.

[0027] In this embodiment, by controlling the extension of the hydraulic telescopic rod, the hydraulic telescopic rod drives the propeller mounting base 1 connected through the flange plate to relatively move relative to the guide connecting cylinder body 4, so that the relative height distance between the propeller blade 2 and the unmanned aerial vehicle body is adjusted, and the included angle (pitch) between the rotation plane of the propeller blade 2 and the airflow is indirectly changed, so that the unmanned aerial vehicle is adapted to different environments. Moreover, the protection spring can play a certain protection role when the height is adjusted.

[0028] Further, the driving device comprises a servo driving motor 5; the output shaft of the servo driving motor 5 is connected with a driving rotary pedestal 51, the driving rotary pedestal 51 is rotatably connected with the outer shell of the servo driving motor 5 through a bearing, and the driving rotary pedestal 51 is driven to rotate by the servo driving motor 5. The two sides of the driving rotary pedestal 51 are respectively connected with rotary connecting arms 52, and the other ends of the rotary connecting arms 52 are connected with the bottom end of the screw connecting shaft 3 through a fixed seat.

[0029] In this embodiment, the servo driving motor 5 is installed at the designed position of the unmanned aerial vehicle, and the telescopic propeller shaft structure can be movably and adaptively passed through the outer shell of the designed position of the unmanned aerial vehicle. By controlling the servo driving motor 5 to drive the driving rotary pedestal 51 to rotate around the outer shell of the servo driving motor 5 which is fixed at this time, the driving rotary pedestal 51 drives the screw connecting shaft 3 connected through the rotary connecting arms 52 to rotate, and finally drives the propeller mounting base 1 to rotate, so as to drive the propeller blade 2 installed on the propeller mounting base 1 to rotate.

[0030] The preferred embodiments of the utility model are described in detail above combined with the drawings, however, any modification, equivalent replacement, improvement and the like made within the spirit and principle of the utility model should be included in the protection scope of the utility model; meanwhile, various different embodiments of the utility model can also be combined arbitrarily, as long as it does not deviate from the thought of the utility model, it should also be regarded as the disclosed content of the utility model.

Claims

1. A variable pitch propeller structure for a drone, characterized by, The propeller mounting seat is provided with propeller blades rotatably adjustable around the propeller mounting seat, and the end of the propeller blades close to the propeller mounting seat is connected with a propeller blade adjusting shaft. The end of the propeller blade adjusting shaft close to the propeller mounting seat is connected with the propeller mounting seat through a rotating bearing, and the propeller blade adjusting shaft is further connected with a limiting snap ring.

2. The variable pitch propeller structure of claim 1, wherein, The telescopic propeller shaft structure comprises a screw connecting shaft. The bottom end of the screw connecting shaft is connected with a driving device for driving the screw connecting shaft to rotate, the top end of the screw connecting shaft is provided with a guide connecting cylinder, and the top end of the screw connecting shaft is arranged in the guide connecting cylinder. The guide connecting cylinder is provided with a telescopic adjusting hydraulic telescopic rod, the bottom end of the hydraulic telescopic rod is connected with the top end of the screw connecting shaft arranged in the guide connecting cylinder, and the other end of the hydraulic telescopic rod is telescopically movable from the top end of the guide connecting cylinder and is arranged in connection with the propeller mounting seat. The cylinder shell of the hydraulic telescopic rod is connected with the inner wall of the guide connecting cylinder.

3. The variable pitch propeller structure of claim 2, wherein, The end of the hydraulic telescopic rod close to the propeller mounting seat is connected with a flange, and the end of the hydraulic telescopic rod close to the propeller mounting seat is connected with the propeller mounting seat through the flange.

4. The variable pitch propeller structure of claim 3, wherein, The output end rod of the hydraulic telescopic rod is movably arranged in a protection spring, one end of the protection spring is connected with the inner wall of the guide connecting cylinder, and the other end of the protection spring is connected with the bottom end of the flange.

5. The variable pitch propeller structure of claim 4, wherein, The driving device comprises a servo driving motor. The output shaft of the servo driving motor is connected with a driving rotary pedestal, the driving rotary pedestal is rotatably connected with the shell of the servo driving motor through a bearing, and the driving rotary pedestal is driven to rotate by the servo driving motor.

6. The variable pitch propeller structure of claim 5, wherein, The two sides of the driving rotary pedestal are respectively connected with rotary connecting arms, and the other ends of the rotary connecting arms are connected with the bottom end of the screw connecting shaft through a fixing seat.

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