Rotor-wing assembly and unmanned aerial vehicle

Patent metadata

Field	Value
Publication number	US-11524775-B2
Application number	US-201916401930-A
Country	US
Kind code	B2
Filing date	May 2, 2019
Priority date	Nov 14, 2016
Publication date	Dec 13, 2022
Grant date	Dec 13, 2022

Abstract

A rotor-wing assembly includes a motor, a propeller, and a connection assembly connecting the propeller to the motor. The motor includes a rotating portion. The connection assembly includes a locking member and a reinforcing member arranged between the propeller and the motor. The locking member locks the propeller to the rotating portion. A first end of the reinforcing member is mounted at the rotating portion. A second end of the reinforcing member opposite to the first end is engaged with the locking member, to reinforce the locking member to lock the propeller to the rotating portion.

First claim

What is claimed is:

1. A rotor-wing assembly comprising:
a motor comprising a rotating portion;
a propeller; and
a connection assembly connecting the propeller to the motor and comprising a locking member and a reinforcing member between the propeller and the motor,
wherein:
the locking member locks the propeller to the rotating portion;
a first end of the reinforcing member is mounted at the rotating portion, and a second end of the reinforcing member opposite to the first end engages with the locking member, to reinforce the locking member to lock the propeller to the rotating portion;
the rotating portion is formed with a first position-limiting structure;
the first end of the reinforcing member is formed with a second position-limiting structure;
when the second position-limiting structure is in a first position, the propeller is in a locked state, and the first position-limiting structure is coupled with the second position-limiting structure to fix the first end of the reinforcing member to the rotating portion; and
when the second position-limiting structure is in a second position, the propeller is in an unlocked state, and the locking member is capable of rotating relative to the propeller about a rotation axis of the propeller.

2. The rotor-wing assembly according to claim 1 , wherein:
one of the first position-limiting structure and the second position-limiting structure is a position-limiting block; and
another one of the first position-limiting structure and the second position-limiting structure is a position-limiting groove configured to engage with the position-limiting block.

3. The rotor-wing assembly according to claim 2 , wherein the position-limiting groove extends in a circumferential direction of a propeller disk formed by rotation of the propeller.

4. The rotor-wing assembly according to claim 1 , wherein:
the rotating portion is formed with a guide-rail groove extending in a circumferential direction of a propeller disk formed by rotation of the propeller;
the locking member comprises a mounting portion mounted at the rotating portion and a guiding portion extending from the mounting portion in a direction away from the propeller; and
the guiding portion is coupled with the guide-rail groove for guiding the locking member to rotate about the rotation axis.

5. The rotor-wing assembly according to claim 4 , wherein:
the guiding portion comprises a guiding section connected with the mounting portion and a holding section connected with the guiding section;
the guiding section is arranged at the guide-rail groove; and
the holding section engages with the rotating portion to prevent the locking member from being separated from the rotating portion.

6. The rotor-wing assembly according to claim 4 , wherein:
the first position-limiting structure is a position-limiting groove and the second position-limiting structure is a position-limiting block configured to engage with the position-limiting groove;
the guide-rail groove is connected with the position-limiting groove; and
the position-limiting block is configured to move from the position-limiting groove to the guide-rail groove, such that the locking member is capable of rotating relative to the propeller about the rotation axis.

7. The rotor-wing assembly according to claim 4 , wherein:
the locking member further comprises a locking catch extending from the mounting portion to the propeller;
the propeller comprises a hub, a blade arranged at a peripheral wall of the hub, and a locking block arranged at the peripheral wall and coupled with the locking catch; and
when the propeller is locked, the locking catch is connected with the locking block and the second end of the reinforcing member engages with the locking catch.

8. The rotor-wing assembly according to claim 7 , wherein:
the locking block is a first locking block;
one end of the locking catch connecting with the first locking block is formed with a second locking block coupled to the first locking block; and
the locking member is engaged with the first locking block to lock the propeller through the second locking block.

9. The rotor-wing assembly according to claim 8 , wherein:
two mutually coupled surfaces of the first locking block and the second locking block are both inclined surfaces tilted at a predetermined angle relative to the rotation axis of the propeller; and
in a direction of the rotation axis, sides of the surfaces proximal to the rotation axis are closer to the motor than sides distal from the rotation axis.

10. The rotor-wing assembly according to claim 9 , wherein the two mutually coupled surfaces of the first locking block and the second locking block are engaged with each other in an interference fit manner.

11. The rotor-wing assembly according to claim 7 , wherein:
the second locking block comprises a top surface, a first side surface connected to the top surface adjacent to and facing the peripheral wall, and a second side surface opposite to the first side surface;
the second end of the reinforcing member is formed with an engaging hook; and
one or more of the top surface, the first side surface, the second side surface, and the engaging hook satisfy at least one of the following:
the engaging hook comprises an engaging surface engaging with the top surface;
the engaging hook comprises two engaging surfaces connected with each other at an angle to each other, and the two engaging surfaces engaging on the top surface and the first side surface, respectively;
the top surface is provided with an engaging hole, the engaging hook comprises an engaging portion and a contact portion connected with each other at an angle to each other, the engaging portion is engaged with the engaging hole, the contact portion is in contact with the top surface;
the top surface is provided with a recess, a bottom of the recess is provided with the engaging hole, the engaging hook comprises the engaging portion and the contact portion connected with each other at an angle to each other, the engaging portion is engaged with the engaging hole, the contact portion is in contact with the bottom of the recess; and
the second side surface is provided with the engaging hole, and the engaging hook is engaged with the engaging hole.

12. The rotor-wing assembly according to claim 11 , wherein:
the reinforcing member further comprises a connection arm connecting the second position-limiting structure with the engaging hook; and
the connection arm is made of an elastic material.

13. The rotor-wing assembly according to claim 7 , wherein:
the blade is a first blade;
the propeller further comprises a second blade;
the first locking block is located between the first blade and the second blade; and
a space is formed between the first locking block and one of the first blade and the second blade, allowing the locking catch to pass through.

14. The rotor-wing assembly according to claim 7 , wherein:
the connection assembly further comprises a connection member connecting the propeller and the rotating portion; and
the connection member is configured to be detachably mounted at the locking member.

15. The rotor-wing assembly according to claim 14 , wherein the connection member comprises:
a connection plate holding against the locking member; and
a position-limiting shaft extending from the connecting plate to the propeller, the position-limiting shaft being connected with the propeller and configured to restrict the rotation of the propeller relative to the connection member.

16. The rotor-wing assembly accordin

Assignees

• Sz Dji Technology Co Ltd

Inventors

• Sun Liang
• Peng Tao
• Guo Xiaokai
• Ou di

Classifications

• B64C27/14 Primary

  Direct drive between power plant and rotor hub · CPC title

• B64C2211/00

  Modular constructions of airplanes or helicopters · CPC title

• B64C11/04

  Blade mountings · CPC title

• B64D27/24

  using steam or spring force (jet aircraft B64D27/16) · CPC title

• B64C27/473 Primary

  Constructional features · CPC title