Folding propeller, power component and unmanned aerial vehicle

Patent metadata

Field	Value
Publication number	US-12110097-B2
Application number	US-202016906561-A
Country	US
Kind code	B2
Filing date	Jun 19, 2020
Priority date	Dec 19, 2017
Publication date	Oct 8, 2024
Grant date	Oct 8, 2024

Abstract

Embodiments of the present application relate to the technical field of propellers, and particularly to a folding propeller, a power component and an unmanned aerial vehicle. The folding propeller includes a hub, at least two blades and at least two connecting pieces, the hub being configured to mount the folding propeller to a driving device. The hub includes a first surface and a second surface disposed oppositely, the first surface facing the driving device, and the second surface facing away from the driving device. Each of the blades is mounted on the second surface by the corresponding connecting piece, and each of the blades is capable of rotating relative to the hub. In the above manner, according to the embodiments of the present application, during mold adjustment in injection molding, a rotary damping between the blade and the hub can be adjusted by only adjusting the friction force of one contact surface, which is convenient for mold adjustment, is beneficial to mass production and reduces the production cost.

First claim

What is claimed is:

1. A folding propeller, comprising a hub, at least two blades and at least two connecting pieces, the hub being configured to mount the folding propeller to a driving device;
wherein the hub comprises a first surface and a second surface disposed oppositely, the first surface facing the driving device, and the second surface facing away from the driving device;
each of the at least two connecting pieces comprises a first abutting portion, a second abutting portion and a connecting portion connecting the first abutting portion and the second abutting portion; each of the at least two blades is mounted on the second surface by a respective one of the at least two connecting pieces, and each of the at least two blades is capable of rotating relative to the hub;
each of the at least two blades is fixedly connected to the respective one of the at least two connecting pieces by injection molding, and the hub is pivoted to the at least two connecting pieces, allowing the at least two blades to rotate relative to the hub; or the hub is fixedly connected to the at least two connecting pieces by injection molding, and each of the at least two blades is pivoted to the respective one of the at least two connecting pieces, allowing the at least two blades to rotate relative to the hub;
the hub comprises a main body portion and at least two overlapping portions connected to the main body portion, and the main body portion and the at least two overlapping portions each comprise two surfaces disposed oppositely. one surfa e of the main body portion being connected to one surface of each of the at least two overlapping portions to form the first surface, and the other surface of the main body portion being connected to the other surface of each of the at least two overlapping portions to form the second surface;
each of the at least two overlapping portions is pivoted to a respective one of the at least two blades by the respective one of the at least two connecting pieces;
each of the at least two blades comprises a pivoting portion, and each pivoting portion is overlapped on a respective one of the at least two overlapping portions and pivoted to the pect one f the at least two overlapping portions by the respective one of the wo connecting pieces;
a through hole is formed in each of the at least two overlapping portions;
a mounting hole is formed in each of the at least two pivoting portions;
each connecting piece passes through a corresponding one mounting hole and a corresponding one through hole to mount each of the at least two blades to the respective one of the at least two overlapping portions;
a surface of the first abutting portion facing the second abutting portion abuts against the first surface;
a surface of the second abutting portion facing the first abutting portion abuts against a side surface of tl respective one of the at least two blades facing away from the at least two overlapping portions; and
the connecting portion passes through the corresponding one mounting hole and the corresponding one through hole.

2. The folding propeller according to claim 1 , wherein a lower surface of each pivoting portion is in contact with the second surface.

3. The folding propeller according to claim 1 , wherein the hub further comprises a boss disposed on the second surface a protruding edge extends from each pivoting portion and is overlapped on the boss.

4. The folding propeller according to claim 3 , wherein a lower surface of each protruding edge is in contact with an upper surface of the boss.

5. The folding propeller according to claim 3 , wherein the boss has an annular cross section.

6. The folding propeller according to claim 3 , wherein a center line of the boss coincides with a center line of a rotating shaft of the driving device.

7. The folding propeller according to claim 3 , wherein the hub comprises two bosses.

8. The folding propeller according to claim 7 , wherein the two units of bosses each has a semicircular or rectangular cross section.

9. The folding propeller according to claim 3 , wherein each protruding edge is in a circular arc shape.

10. The folding propeller according to claim 1 , wherein the hub further comprises a boss disposed on the second surface; and
a protruding edge extends from each pivoting portion and is located above the boss, wherein when the folding propeller is driven to rotate by the driving device, each protruding edge is in contact with an upper surface of the boss.

11. The folding propeller according to claim 1 , wherein when each of the at least two blades is fixedly connected to the respective one of the at least two connecting pieces by injection molding, and the hub is pivoted to the at least two connecting pieces, allowing the at least two blades to rotate relative to the hub, an annular groove is formed in each of the at least two connecting portions, an annular protrusion is disposed in each mounting hole, and each annular protrusion is locked in a corresponding annular groove.

12. The folding propeller according to claim 1 , wherein when each of the at least two blades is fixedly connected to the respective one of the at least two connecting pieces by injection molding, and the hub is pivoted to the at least two connecting pieces, allowing the at least two blades to rotate relative to the hub, each second abutting portion comprises a tooth portion, a limit slot is formed in each blade, and each tooth portion is locked in a corresponding limit slot.

13. The folding propeller according to claim 1 , wherein when the hub is fixedly connected to the at least two connecting pieces by injection molding, and each of the at least two blades is pivoted to the respective one of the at least two connecting pieces, allowing the at least two blades to rotate relative to the hub, an annular protrusion is disposed in each through hole, and each annular protrusion is locked in a corresponding annular groove.

14. The folding propeller according to claim 1 , wherein when the hub is fixedly connected to the at least two connecting pieces by injection molding, and each of the at least two blades is pivoted to the respective one of the at least two connecting pieces, allowing the at least two blades to rotate relative to the hub, each first abutting portion comprises a tooth portion, a limit slot is formed in the hub, and each tooth portion is locked in the limit slot.

Assignees

• Autel Robotics Co Ltd

Inventors

• Zhang Hailang
• Sun Wei
• Luo Dongdong

Classifications

• B64U10/14

  with four distinct rotor axes, e.g. quadcopters · CPC title

• B64U20/50

  Foldable or collapsible UAVs (with frangible components B64U20/30) · CPC title

• B64C11/28

  Collapsible or foldable blades · CPC title

• B64C11/20

  Constructional features · CPC title

• B64C11/10

  rigid · CPC title