Electric fan swing angle adjustment device

Abstract

The invention discloses an electric fan oscillating angle adjustment device and an angle adjustment sampling electric signal data acquisition method. A rotor marker is installed on the motor, and a rotor position sensing signal acquisition device is arranged at a distance corresponding to the rotor marker. The rotor position The sensing signal acquisition device is connected to the angle adjustment control chip through wires; in order to make the angle adjustment sampling electrical signal data acquired by the motor rotor position sensing signal acquisition device correspond to and regularize the lengthening motion track of the planetary wheel crank during the angle adjustment process, it must Define the "reference zero point" and "maximum displacement inflection point" positions of the planetary gear crank, and logically transform according to the predetermined transmission ratio of the power transmission mechanism of the variable-angle gearbox, so that when the motor rotor is running during the angle adjustment process, the planetary gear can be obtained. The crank's variable-length motion trajectory corresponds to and regularly samples electrical signal data. This device has the characteristics of non-contact sampling, stability, reliability and low cost.

Description

technical field [0001] The invention relates to an electric fan oscillating device, in particular to an electric fan oscillating angle adjustment device. The invention also relates to a sampling electric signal acquisition method of the swing angle adjusting device. Background technique [0002] An existing electric fan swing angle adjustment device (China Special Issue No. 200510037286.1) is characterized in that it consists of a set of worm-worm gear-worm shaft-big gear power transmission mechanism, planetary crank mechanism and large gear ——In the variable-angle gear box composed of the pawl clutch device, a set of reciprocating mechanical sampling device composed of cam-follower-swing rod is set, and the fork at the end of the reciprocating mechanical sampling device A set of sampling electrical signal conversion device is installed on the conductive signal conversion substrate with the slider conductive contact for reciprocating sliding. The sampling electrical signal ...

AI Technical Summary

Problems solved by technology

However, since the joint type between the conductive contact of the slider and the conductive signal conversion substrate is a frictional sliding elastic pressure contact changing device, as the use time prolongs, the more reciprocating sliding friction of the slider, the greater the friction between the conductive contact and the substrate. There will be more serious wear and oxidation (electrocorrosion). Due to the uneven thickness of the oxide layer and the uneven elastic pressure contact of the conductive contact, the sampling electrical signal fed back and transmitted during the angle adjustment operation often appears irregular and disordered. , leading to the failure of the operation of the angle adjustment control chip, which makes the adjustment and control of the electric fan swing angle fail, which needs to be improved

In addition, due to the small space of the variable-angle gearbox housing, the reciprocating mechanical action process of the built-in cam-follower-swing rod mechanical sampling mechanism is relatively short, generally only a few millimeters in stroke, and there are many reciprocating mechanisms. , the cumulative work difference of various coordination is large, resulting in the reciprocating mechanical sampling mechanism superimposed on the conductive contact of the slider - the sampling electrical signal output by the conductive signal conversion substrate transmission device has a low resolution, and the production cost is high, so it is difficult to meet the angle adjustment requirements. It is used in electric fans with slightly higher precision, which also needs to be improved

Images