Patent ID: 11873823
Assignee: nan
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A fan component of a fan lamp, wherein the fan component comprises a blade mounting disc and a plurality of fan blades that are rotationally mounted along a circumferential direction and on a same side of the blade mounting disc, one side of the blade mounting disc away from the fan blades is provided with planetary gears synchronously rotating with corresponding fan blades and a solar gear capable of rotating relative to the blade mounting disc, the planetary gears are distributed along a circumferential direction around the solar gear, and are meshed with the solar gear, wherein a peripheral surface of the solar gear is provided with first spring mounting structures, one side of the blade mounting disc away from the fan blades is provided with second spring mounting structures respectively located on the same side of the first spring mounting structures, a return tension spring is connected between each pair of the first spring mounting structures and the second spring mounting structures, and each return tension spring is arranged on a circumferential outside of the solar gear; and
when the blade mounting disc rotates at a high speed, the solar gear rotates relative to the blade mounting disc in a direction of pulling the return tension springs, so that the fan blades expand outward; when the blade mounting disc stops rotating, the solar gear rotates reversely under driving of each return tension spring, so that each fan blade packs up inwards;
wherein part of a peripheral surface of each of the planetary gears is provided with a segment of driven teeth, part of the peripheral surface of the solar gear is provided with driving teeth respectively matched with the segment of the driven teeth, and a maximum angle of rotation of the solar gear is defined through a rotation limit structure;
wherein the solar gear comprises a solar wheel base ring with a ring structure; each segment of the driving teeth is distributed on a peripheral surface of the solar wheel base ring along the circumferential direction; one side of the blade mounting disc away from the fan blades protrudes to form a cylindrical boss matched with the solar wheel base ring; the solar wheel base ring is rotationally sleeved on the cylindrical boss; the rotation limit structure comprises a rotation limit bulge protruding outwardly from the cylindrical boss along a radial direction, a rotation limit stop protruding inwardly from the solar wheel base ring along a radial direction and a locking step protruding outwardly from the solar wheel base ring along a radial direction; and the locking step is provided at a same end of at least one segment of driving teeth; and
when the rotation limit bulge abuts against the rotation limit stop, the maximum angle of rotation of the solar gear in one direction is defined; and when the driven teeth are locked on the locking step, the maximum angle of rotation of the solar gear in an other direction is defined.