Gear box of fan

Abstract

The invention discloses a gear box of a fan. The gear box comprises a gear box body and a box cover, wherein a motor shaft, a hand-pulling shaft, a worm wheel and a worm-wheel shaft are arranged in the gear box body; the hand-pulling shaft stretches to the exterior of the gear box body through a hand-pulling through hole; the worm-wheel shaft stretches to the exterior of the gear box body through a worm-wheel shaft through hole; the worm wheel is mutually meshed with the motor shaft together; a groove is arranged in the interior of the worm wheel; the worm-wheel shaft is provided with a connecting bulge; the worm wheel is arranged at the bottom of the hand-pulling shaft; the connecting bulge is arranged in the groove; when the hand-pulling shaft is pulled up, the worm wheel upwards moves along the connecting bulge to leave the motor shaft but not to disengage the connecting bulge. When the handle shaft is pulled up, the worm wheel can leave the motor shaft, but the hand-pulling shaft, the worm wheel and the worm-wheel shaft cannot be separated mutually; therefore, the condition that the groove and the connecting bulge generate deflection to cause that the hand-pulling shaft cannot be pressed down cannot occur when the handle shaft is pulled and pressed; therefore, an exception can be guaranteed not to occur to the head shaking function of the fan.

Description

technical field [0001] The invention relates to the field of oscillating fans, in particular to a fan gear box. Background technique [0002] The current oscillating fans all have a gear box, and when the puller in the gear box is pulled up or pressed down, a corresponding effect on the oscillating head of the fan can be realized. In the structure of the existing fan gear box, such as the gear box structure of the horn fan, the pumping shaft, the worm wheel and the worm shaft are independently separated from each other, and the pumping shaft is connected with the worm wheel and the worm shaft through a buckle. When the hand shaft is connected with the worm wheel and the worm shaft, the motor shaft drives the worm wheel to rotate, and the worm wheel drives the hand shaft to rotate through the buckle, so the worm wheel shaft rotates under the drive of the hand shaft, so that the fan shakes its head; When the hand shaft is used, the hand shaft leaves the worm wheel, and the wo...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the above problems, the object of the present invention is to provide a fan gearbox, the puller shaft and the worm gear are connected together, after the puller shaft is pulled out, the worm wheel can be separated from the motor shaft, but the puller shaft, the worm wheel and the worm shaft are mutually There will be no separation between them, so there will be no deviation of the connection between the worm wheel and the worm gear shaft when pulling out and pressing the pumping shaft, so that the pumping shaft cannot be pressed down, so it can ensure that the shaking head function of the fan will not appear abnormal

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