# US 11,027,833 B2 · Aerial system propulsion assembly and method of use

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- Number: US 11,027,833 B2
- Document ID: US11027833B2
- Status: Granted
- Kind: B2
- Application number: 16/553,649
- Filed: 2019-08-28
- Published: 2019-12-19
- Granted: 2021-06-08
- Earliest claimed: 2016-04-24
- Assignees: Hangzhou Zero Zero Technology Co., Ltd.
- Applicants: Hangzhou Zero Zero Technology Co., Ltd.
- Inventors: Lei Zhang; Hanqing Guo; Zhaozhe Wang; Tong Zhang; Mengqiu Wang
- Web page: https://patentgrep.com/patent/US11027833B2

## CPC

- B64C 27/32: Rotors
- B64C 11/02: Hub construction
- B64C 11/04: Blade mountings
- B64C 27/14: Direct drive between power plant and rotor hub
- B64U 30/26: Ducted or shrouded rotors
- B64U 30/30: Lift-producing means using radial airflow
- B64C 27/001: {Vibration damping devices}
- B64C 2027/003: {mounted on rotor hub, e.g. a rotary force generator}
- B64U 10/14: with four distinct rotor axes, e.g. quadcopters
- B64U 50/19: using electrically powered motors
- B64C: AEROPLANES; HELICOPTERS
- B64U: UNMANNED AERIAL VEHICLES [UAV]; EQUIPMENT THEREFOR

## Abstract

An aerial vehicle including a housing, an outrunner motor including a stator mechanically coupled to the housing and a rotor rotationally coupled to the stator, and a propeller removably coupled to the rotor, the propeller including a hub and a plurality of propeller blades. A rotor, a propeller including a hub and a propeller blade, a radial alignment mechanism, a rotational retention mechanism, and an axial retention mechanism.

## Claims

### Claim 1

An aerial vehicle comprising:
a housing;
an outrunner motor comprising a stator mechanically coupled to the housing and a rotor rotationally coupled to the stator about a rotor axis, the rotor comprising:
a body centered around and extending parallel the rotor axis;
an outward protrusion from the body, the outward protrusion mechanically connected to the body and defined along an outer perimeter of a cross-section of the body, the cross-section normal the rotor axis;
a radial member mechanically connected to the body and extending radially inward from the body; and
a boss mechanically coupled to the body by the radial member, the boss centered around and extending parallel the rotor axis; and
a propeller removably coupled to the rotor, the propeller comprising a hub and a plurality of propeller blades mechanically coupled to the hub, the propeller defining a central propeller axis, the hub comprising:
an inner surface arranged around the body and defining a recess retaining the outward protrusion within the recess;
a limit member contacting the radial member and rotationally retaining the propeller about the rotor axis with respect to the rotor; and
a surface defining a hole centered around the central propeller axis, the boss arranged within the hole and retaining the central propeller axis substantially collinear with the rotor axis.

### Claim 2 (depends on 1)

The aerial vehicle of claim 1, wherein the hub is mounted below the rotor.

### Claim 3 (depends on 1)

The aerial vehicle of claim 1, wherein the body comprises a substantially cylindrical body segment.

### Claim 4 (depends on 1)

The aerial vehicle of claim 1, further comprising a set of radial members comprising the radial member, each radial member of the set mechanically connected to the body and to the boss.

### Claim 5 (depends on 1)

The aerial vehicle of claim 1, wherein the plurality of propeller blades define a regular angular spacing around the central propeller axis.