Self-tightening rotor

摘要

Systems, methods, and devices for propelling self-propelled movable objects are provided. In one aspect, a rotor assembly for a self-propelled movable object comprises: a hub comprising a first fastening feature; a drive shaft comprising a second fastening feature and directly coupled to the hub by a mating connection of the first and second fastening features, wherein the drive shaft is configured to cause rotation of the hub such that the mating connection of the first and second fastening features is tightened by the rotation; and a plurality of rotor blades coupled to the hub and configured to rotate therewith to generate a propulsive force.

主权项

1. A multi-rotor self-propelled movable object, the movable object comprising:
(a) a first rotor assembly comprising:
a first hub coupled to a first plurality of blades, wherein the first hub comprises a first fastening feature including a first aperture and a first pair of stops;a first adapter coupled to the first hub, wherein the first adapter comprises a second fastening feature including a first pair of protrusions; anda first drive shaft coupled to the first hub through the first adapter by a mating connection of the first and second fastening features,wherein the first drive shaft is configured to cause rotation of the first hub in a first direction via a rotational force component that is transmitted from the first drive shaft to the first hub via contact between the first pair of protrusions and the first pair of stops, and wherein the first plurality of blades coupled to the first hub are configured to rotate therewith in the first direction to generate a first propulsive force providing lift to the movable object; and (b) a second rotor assembly comprising:
a second hub coupled to a second plurality of blades, wherein the second hub comprises a third fastening feature including a second aperture and a second pair of stops;a second adapter coupled to the second hub, wherein the second adapter comprises a fourth fastening feature including a second pair of protrusions; anda second drive shaft coupled to the second hub through the second adapter by a mating connection of the third and fourth fastening features, wherein the second drive shaft is configured to cause rotation of the second hub in a second direction opposite to the first direction via a rotational force component that is transmitted from the second drive shaft to the second hub via contact between the second pair of protrusions and the second pair of stops, and wherein the second plurality of blades coupled to the second hub are configured to rotate therewith in the second direction to generate a second propulsive force providing lift to the movable object.