A ceiling mounted fan or ceiling fan includes a body defining an interior passage having an inlet and an outlet provided on the body. The inlet, outlet, and interior passage can be annular. An impeller mounted is mounted within the interior passage and driven by a motor mounted within the body to draw a volume of air through the interior passage from the inlet to the outlet. The impeller blades include a set of extensions extending from the tip.

A ceiling mounted fan or ceiling fan includes a body defining an interior passage having an inlet and an outlet provided on the body. The inlet, outlet, and interior passage can be annular. An impeller mounted is mounted within the interior passage and driven by a motor mounted within the body to draw a volume of air through the interior passage from the inlet to the outlet. The impeller blades include a set of extensions extending from the tip.

A ceiling fan having double-layer blades includes a motor unit, a blade frame unit, a first blade unit, and a second blade unit. The blade frame unit has a blade frame body. The first blade unit includes a plurality of first blades. The second blade unit includes a plurality of second blades. The first blades and the second blades surround the outside of the blade frame body, so that there is no need for the motor unit to provide a motor housing for connecting the first blades and the second blades, thereby saving costs and installation costs. With the arrangement of the first blades and the second blades, the ceiling fan can increase the current of air for cooling.

A ceiling fan having double-layer blades includes a motor unit, a blade frame unit, a first blade unit, and a second blade unit. The blade frame unit has a blade frame body. The first blade unit includes a plurality of first blades. The second blade unit includes a plurality of second blades. The first blades and the second blades surround the outside of the blade frame body, so that there is no need for the motor unit to provide a motor housing for connecting the first blades and the second blades, thereby saving costs and installation costs. With the arrangement of the first blades and the second blades, the ceiling fan can increase the current of air for cooling.

A quick buckle structure of a fan blade of a ceiling fan comprises a base fixed on a rotor of a ceiling fan motor, wherein the base is provided with a bottom wall and a front wall, the front wall is provided with an insertion opening, the bottom wall is provided with a guide rail part adjacent to the insertion opening, and the bottom wall is provided with a fixing frame located above the guide rail part. The fan blade is inserted into the insertion opening with a tongue part, wherein the tongue part extends along the guide rail part. The tongue part is provided with a base area located behind the fixing frame, a stop block is integrally erected on the base area, and the stop block abuts against the fixing frame so that the fan blade cannot exit from the insertion port.

A quick buckle structure of a fan blade of a ceiling fan comprises a base fixed on a rotor of a ceiling fan motor, wherein the base is provided with a bottom wall and a front wall, the front wall is provided with an insertion opening, the bottom wall is provided with a guide rail part adjacent to the insertion opening, and the bottom wall is provided with a fixing frame located above the guide rail part. The fan blade is inserted into the insertion opening with a tongue part, wherein the tongue part extends along the guide rail part. The tongue part is provided with a base area located behind the fixing frame, a stop block is integrally erected on the base area, and the stop block abuts against the fixing frame so that the fan blade cannot exit from the insertion port.

Composite fan blade platform includes forward and aft portions and transition portion therebetween. Platform mounting holes extend through increased section thickness in transition portion and conical countersinks centered about centerlines of mounting holes extend into transition portion. Bolts include bolt shanks extending away from boltheads through center bolt holes in conical load spreaders in conical countersink. Boltheads engage conical load spreader. Bolthead is disposed entirely within cylindrical counterbore into top of load spreader and engages shoulder at bottom of cylindrical counterbore. Radial gap between bolthead and cylindrical counterbore surface of cylindrical counterbore may be filled by filler or filler ring. Bolts may join platform supports to disk hooks attached, fixed or joined to, or integral with disk posts of disk. Nuts threaded on threaded inner end of bolt shank may secure bases attached to platform supports to fan blade platform.

Composite fan blade platform includes forward and aft portions and transition portion therebetween. Platform mounting holes extend through increased section thickness in transition portion and conical countersinks centered about centerlines of mounting holes extend into transition portion. Bolts include bolt shanks extending away from boltheads through center bolt holes in conical load spreaders in conical countersink. Boltheads engage conical load spreader. Bolthead is disposed entirely within cylindrical counterbore into top of load spreader and engages shoulder at bottom of cylindrical counterbore. Radial gap between bolthead and cylindrical counterbore surface of cylindrical counterbore may be filled by filler or filler ring. Bolts may join platform supports to disk hooks attached, fixed or joined to, or integral with disk posts of disk. Nuts threaded on threaded inner end of bolt shank may secure bases attached to platform supports to fan blade platform.

A detachable blades for a ceiling fan comprises a blade seat for the connecting portion of the blade to be assembled on the same, a spherical cover having a plurality of slots for the connecting portion of the blade to be inserted through and assembled to the blade seat, a cover plate to cover the connecting portion of the blade on the blade seat and a detachable member contained in the cover plate to firmly catching the connecting portion of the blade. The blade assembly according to the invention is strong in its structure and also easily for the blade to be detached for a replacement.

A detachable blades for a ceiling fan comprises a blade seat for the connecting portion of the blade to be assembled on the same, a spherical cover having a plurality of slots for the connecting portion of the blade to be inserted through and assembled to the blade seat, a cover plate to cover the connecting portion of the blade on the blade seat and a detachable member contained in the cover plate to firmly catching the connecting portion of the blade. The blade assembly according to the invention is strong in its structure and also easily for the blade to be detached for a replacement.