A coaxial counter-rotating propeller structure for unmanned aerial vehicles

Abstract

The utility model relates to an unmanned plane technical field especially a kind of unmanned plane coaxial pair paddle structure, including mainframe shell, landing gear is arranged on mainframe shell, machine arm is arranged on landing gear, center coaxial is arranged on machine arm, motor and fixed seat are arranged on center coaxial, paddle is arranged on the motor shaft of motor, screw groove and countersunk hole are opened in fixed seat, the periphery of center coaxial is equipped with side shield, connecting rod is connected on side shield, screw rod is equipped on connecting rod, locking slot is opened in screw rod, locking stud is equipped on fixed seat, column handle is arranged on locking stud, damping pressure ring and sealing sleeve ring are equipped on column handle, weather-resistant scratch-resistant layer is arranged on side shield. Avoid the case that slightly inattentive outside motor and paddle can directly collide with hard material such as wall, improve the convenient replacement installation of side shield on unmanned plane with coaxial pair paddle structure, improve the weather-resistant scratch resistance of side shield outer wall surface.

Description

Technical Field

[0001] This utility model relates to the field of unmanned aerial vehicle (UAV) technology, and in particular to a coaxial propeller structure for UAVs. Background Technology

[0002] Unmanned aerial vehicles (UAVs), commonly known as "unmanned aircraft," are unmanned aircraft controlled by radio remote control equipment and their own program control devices. Among them, UAVs with coaxial rotor structure are widely used in high-quality shooting fields such as military and defense inspection, power line inspection, and aerial photography inspection.

[0003] A coaxial propeller structure drone refers to a propulsion system in which two identical propellers are mounted on the same central coaxial axis, but are layered and rotate in opposite directions. Through the two counter-rotating propellers, torque self-balancing is achieved, and power is concentrated and used efficiently to generate lift.

[0004] The specific structure and working principle are as follows: each arm is equipped with a central coaxial axis, and there is an independent motor at each end of the central coaxial axis. The two motors are controlled by the flight control system through an electronic speed controller. Combined with the antenna and the preset wireless remote controller, one motor is directly commanded to rotate forward and the other motor to rotate in reverse, so that the drone can take off and fly.

[0005] Currently, existing drones with coaxial propeller structures are prone to collisions with hard objects such as walls during flight if not handled carefully. This significantly reduces the collision protection of the motors and propellers of drones with coaxial propeller structures during flight.

[0006] To address this, we designed a drone with a coaxial propeller structure to provide collision protection for the motor and propeller blades, meeting the needs of practical applications. Utility Model Content

[0007] The purpose of this invention is to address the aforementioned shortcomings in the existing technology by proposing a coaxial propeller structure for unmanned aerial vehicles (UAVs).

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] Design a coaxial propeller structure for a drone, including a main body shell, an antenna at the top of the main body shell, a camera at the bottom of the main body shell, a landing gear on the main body shell, an arm on the landing gear, a central coaxial axis on the arm, a motor and a mounting base on the central coaxial axis, a propeller blade on the motor shaft of the motor, a screw groove and a countersunk screw hole on the mounting base, a side guard around the central coaxial axis, a connecting rod on the side guard, a screw on the connecting rod, and a locking groove on the screw.

[0010] The fixed base is provided with a locking stud, the locking stud is provided with a shank, the shank is provided with a damping pressure ring and a sealing sleeve, and the shank is provided with a buckling groove;

[0011] The side guard is provided with a weather-resistant and scratch-resistant layer, and the connecting rod is provided with reinforcing ribs and paddles.

[0012] In detail, the central coaxial structure is a vertically arranged cylindrical structure, the motor consists of two symmetrical sets, and the fixing base is a rectangular parallelepiped structure located on the outer wall of the central coaxial structure.

[0013] In detail, the side shield is a semi-circular shield structure, and the weather-resistant and scratch-resistant layer is uniformly coated along the outer side wall of the side shield. The weather-resistant and scratch-resistant layer is a polyurethane coating with a thickness of 30 to 50 micrometers.

[0014] In detail, the screw is threaded to the screw groove, and the locking stud is threaded to the countersunk screw hole and engages with the locking slot.

[0015] In detail, the paddles are arranged in two symmetrical sets, and the shank is not higher than the countersunk screw hole.

[0016] In detail, the damping pressure ring is pressed against the inner wall of the countersunk screw hole, and the sealing sleeve is evenly distributed along the outer wall of the shank and pressed against the inner wall of the countersunk screw hole.

[0017] In detail, the connecting rod is located on the inner wall of the side shield, and the reinforcing rib consists of four triangular structural plates arranged circumferentially between the connecting rod and the side shield.

[0018] In detail, the groove is an arc-shaped inner groove structure and its inner wall is provided with an anti-slip layer. The anti-slip layer is a diamond abrasive layer with a thickness of 80 to 90 micrometers.

[0019] The design scheme proposed in this utility model has the following beneficial effects in application:

[0020] 1. This utility model provides effective and comprehensive side protection for the motor and propellers on the central coaxial axis of the drone arm by setting a fixed base on the fixed base and installing side shield structures on the fixed base. During the flight of the drone, the four side shield structures effectively protect the motor and propellers on the central coaxial axis, effectively preventing the motor and propellers from directly colliding with hard objects such as walls if not careful, thus avoiding damage to the motor and propellers. This effectively improves the collision protection of the motor and propellers of the drone with the coaxial propeller structure during flight.

[0021] 2. This utility model greatly improves the ease of replacement and installation of the side shield on UAVs with coaxial propeller structure by opening a screw groove and countersunk screw hole on the fixed base, setting a locking stud with a shank, opening a buckling groove on the shank, and setting a connecting rod structure with a screw on the side shield.

[0022] 3. This utility model improves the weather resistance and scratch resistance of the outer wall of the side shield by setting a weather-resistant and scratch-resistant layer structure on the outer wall of the side shield, thereby increasing the service life of the outer wall of the side shield. Attached Figure Description

[0023] Figure 1 This is an exploded three-dimensional schematic diagram of the side guard and locking studs of this utility model in the uninstalled state;

[0024] Figure 2 For the present utility model Figure 1 Enlarged view of a section at point X;

[0025] Figure 3 For the present utility model Figure 1 A three-dimensional schematic diagram of the middle side shield;

[0026] Figure 4 This is an exploded three-dimensional schematic diagram of the side guard and locking studs of this utility model in the installed state;

[0027] Figure 5 For the present utility model Figure 4 Enlarged view of a portion of point Y in the middle;

[0028] Figure 6 For the present utility model Figure 1 A three-dimensional schematic diagram of a locking stud with a damping pressure ring and a sealing ring.

[0029] In the diagram: 1. Mainframe housing; 11. Antenna; 12. Camera; 13. Landing gear; 2. Arm; 21. Coaxial center; 22. Motor; 23. Propeller blade; 4. Mounting base; 41. Screw groove; 42. Countersunk screw hole; 5. Connecting rod; 51. Screw; 52. Locking slot; 53. Paddle; 54. Reinforcing rib; 6. Side guard; 61. Weather-resistant and scratch-resistant layer; 7. Locking stud; 71. Stud handle; 72. Damping pressure ring; 73. Sealing ring; 8. Snap groove; 81. Anti-slip layer. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0031] Reference Figures 1-6 A coaxial propeller structure for a drone includes a main body shell 1, an antenna 11 at the top of the main body shell 1, a camera 12 at the bottom of the main body shell 1, a landing gear 13 on the main body shell 1, an arm 2 on the landing gear 13, a central coaxial 21 on the arm 2, a motor 22 and a mounting base 4 on the central coaxial 21, a propeller blade 23 on the motor shaft of the motor 22, a screw groove 41 and a countersunk screw hole 42 on the mounting base 4, a side guard 6 around the central coaxial 21, a connecting rod 5 on the side guard 6, a screw 51 on the connecting rod 5, and a locking groove 52 on the screw 51.

[0032] The fixed base 4 is provided with a locking stud 7, the locking stud 7 is provided with a shank 71, the shank 71 is provided with a damping pressure ring 72 and a sealing sleeve 73, and the shank 71 is provided with a buckling groove 8.

[0033] The side shield 6 is provided with a weather-resistant and scratch-resistant layer 61, and the connecting rod 5 is provided with a reinforcing rib 54 and a lever 53. The main body shell 1, antenna 11, camera 12, landing gear 13, arm 2, central coaxial 21, motor 22, and propeller 23 described in this patent are all related structures of a UAV with a coaxial propeller structure. Among them, a PLC controller is pre-installed in the main body shell 1. The overall structure and operating principle are existing technologies. Some existing structures are not drawn and labeled, so they do not need to be described in detail.

[0034] It should be further explained that the central coaxial 21 is a vertically arranged cylindrical structure, the motor 22 consists of two symmetrical sets, the fixing seat 4 is a rectangular structure and is located on the outer wall of the central coaxial 21. The fixing seat 4 and the central coaxial 21 are made of aluminum alloy and are welded to the central coaxial 21.

[0035] It should be further noted that the side shield 6 has a semi-circular shield structure, which effectively and comprehensively protects the motor 22 and the blade 23 from the side.

[0036] The weather-resistant and scratch-resistant layer 61 is uniformly coated along the outer wall of the side cover 6. The weather-resistant and scratch-resistant layer 61 is a polyurethane coating with a thickness of 30 to 50 micrometers. The polyurethane coating has excellent weather resistance and scratch resistance.

[0037] It should be further explained that the screw 51 is threadedly connected to the screw groove 41. When the left end of the screw 51 contacts and is positioned with the inner wall of the screw groove 41, the locking groove 52 is just aligned with the locking stud 7.

[0038] The locking stud 7 is threadedly connected to the countersunk screw hole 42 and engages with the locking groove 52. When the locking stud 7 is removed from the locking groove 52, the locking stud 7 is still threadedly connected to the countersunk screw hole 42 to prevent the locking stud 7 from being lost.

[0039] It should be further noted that the paddles 53 are arranged in two symmetrical sets. The paddles 53 are easy to move with your fingers, which can drive the screw 51 to be threaded into the screw groove 41.

[0040] The shank 71 is not higher than the countersunk screw hole 42 to avoid the shank 71 protruding and causing collision with foreign objects.

[0041] It should be further explained that the damping pressure ring 72 is pressed against the inner wall of the countersunk screw hole 42. The damping pressure ring 72 is made of silicone rubber, which has high elasticity and damping friction. When the locking stud 7 is threadedly locked with the countersunk screw hole 42, the damping pressure ring 72 is compressed and generates a vertical rebound force. This vertical rebound force acts on the locking stud 7, achieving the anti-loosening effect.

[0042] The sealing ring 73 is evenly distributed along the outer wall of the shank 71 and presses against the inner wall of the countersunk screw hole 42. The sealing ring 73 is made of high-elasticity and corrosion-resistant rubber material, which ensures the sealing and waterproofing between the shank 71 and the countersunk screw hole 42.

[0043] It should be further noted that the connecting rod 5 is located on the inner wall of the side cover 6, and the number of reinforcing ribs 54 consists of four triangular structural plates arranged in a circle between the connecting rod 5 and the side cover 6. The connecting rod 5, the reinforcing ribs 54, and the side cover 6 are all made of aluminum alloy, which is lightweight and has high strength. The four triangular structural plates of the reinforcing ribs 54 further improve the structural stability between the connecting rod 5 and the side cover 6.

[0044] It should be further explained that the groove 8 is an arc-shaped inner groove structure and its inner wall is provided with an anti-slip layer 81. The anti-slip layer 81 is a diamond abrasive layer with a thickness of 80 to 90 micrometers. First, an epoxy resin primer is sprayed into the inner groove of the groove 8, and then diamond abrasive particles are evenly sprinkled. After curing and solidification, it can be bonded. When a finger is inserted into the groove 8 and rotated, the diamond abrasive particles can provide an extremely excellent anti-slip effect.

[0045] Operating mode: During the flight of the drone (the wireless remote control of the drone is existing technology and needs no further explanation), the four side shields 6 provide effective and comprehensive side protection for the motor 22 and propeller 23 on the central coaxial 21. This effectively prevents the motor 22 and propeller 23 from directly colliding with hard objects such as walls if not handled carefully, thus avoiding damage to the motor 22 and propeller 23. This effectively improves the collision protection of the motor 22 and propeller 23 of the drone with the coaxial propeller structure during flight.

[0046] Furthermore, if the side shield 6 requires replacement due to collision deformation after prolonged use, please refer to [reference needed]. Figure 3 and Figure 5 Insert your finger into the groove 8 and rotate it counterclockwise, causing the shank 71 and the locking stud 7 to rotate counterclockwise. Through the threaded transmission between the stud and the countersunk screw hole 42, the locking stud 7 moves and exits the locking slot 52. Stop rotating the shank 71. Then, hold the lever 53 and rotate it counterclockwise. Through the connecting rod 5, the side cover 6 and the screw 51 rotate counterclockwise as a whole. Through the threaded transmission of the screw groove 41, when the screw 51 moves outward and exits the screw groove 41, stop rotating the lever 53. The side cover 6 that has undergone collision deformation can then be removed. Then, take the new side cover 6 and thread its screw 51 into the screw groove 41. Next, thread the locking stud 7 into the locking slot 52 to secure the new side cover 6. This greatly improves the ease of replacement and installation of the side cover 6 on UAVs with coaxial propeller structures.

[0047] In addition, by setting a weather-resistant and scratch-resistant layer 61 structure on the outer wall of the side shield 6, the weather resistance and scratch resistance of the outer wall of the side shield 6 are further improved, thereby increasing the service life of the outer wall of the side shield 6.

[0048] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A coaxial propeller structure for an unmanned aerial vehicle (UAV), comprising a main body housing (1), characterized in that: The main housing (1) is provided with a landing gear (13), the landing gear (13) is provided with a boom (2), the boom (2) is provided with a central coaxial (21), the central coaxial (21) is provided with a motor (22) and a fixed base (4), the motor shaft of the motor (22) is provided with a blade (23), the central coaxial (21) is provided with a side guard (6), and the side guard (6) is provided with a connecting rod (5); The fixed base (4) is provided with a locking stud (7), the locking stud (7) is provided with a shank (71), the shank (71) is provided with a damping pressure ring (72) and a sealing sleeve (73), and the shank (71) is provided with a buckle groove (8). The side shield (6) is provided with a weather-resistant and scratch-resistant layer (61), and the connecting rod (5) is provided with a reinforcing rib (54) and a paddle (53).

2. The coaxial propeller structure for a UAV according to claim 1, characterized in that: The central coaxial (21) is a vertically arranged cylindrical structure, the motor (22) consists of two symmetrical sets, and the fixing base (4) is a rectangular parallelepiped structure located on the outer wall of the central coaxial (21).

3. The coaxial propeller structure for a UAV according to claim 1, characterized in that: The side shield (6) is a semi-arc-shaped shield structure. The weather-resistant and scratch-resistant layer (61) is uniformly coated along the outer side wall of the side shield (6). The weather-resistant and scratch-resistant layer (61) is a polyurethane coating with a thickness of 30 to 50 micrometers.

4. The coaxial propeller structure for a UAV according to claim 1, characterized in that: The connecting rod (5) is provided with a screw (51), and the screw (51) is provided with a locking groove (52); the fixing seat (4) is provided with a screw groove (41) and a countersunk screw hole (42); the screw (51) is threadedly connected to the screw groove (41), and the locking stud (7) is threadedly connected to the countersunk screw hole (42) and engages with the locking groove (52).

5. The coaxial propeller structure for a UAV according to claim 1, characterized in that: The paddles (53) are arranged in two symmetrical sets, and the shank (71) is not higher than the countersunk screw hole (42).

6. The coaxial propeller structure for a UAV according to claim 1, characterized in that: The damping pressure ring (72) is pressed against the inner wall of the countersunk screw hole (42), and the sealing sleeve (73) is evenly arranged along the outer wall of the shank (71) and pressed against the inner wall of the countersunk screw hole (42).

7. The coaxial propeller structure for a UAV according to claim 1, characterized in that: The connecting rod (5) is located on the inner wall of the side cover (6), and the number of the reinforcing ribs (54) is four triangular structural plates arranged in a circle between the connecting rod (5) and the side cover (6).

8. The coaxial propeller structure for a UAV according to claim 1, characterized in that: The groove (8) is an arc-shaped inner groove structure and its inner wall is provided with an anti-slip layer (81). The anti-slip layer (81) is a diamond abrasive layer with a thickness of eighty to ninety micrometers.

9. The coaxial propeller structure for a UAV according to claim 1, characterized in that: An antenna (11) is provided at the top of the main unit housing (1), and a camera (12) is provided at the bottom of the main unit housing (1).

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