Magnetoelectric absolute type encoder for planetary gear structure

Abstract

The invention provides a magnetoelectric absolute encoder with a planetary gear structure, which includes an encoder main shaft, a main body, a pillar, a circuit board, a magnet, a magnet holder and a planetary gear box. The encoder main shaft is fixed to the main body through a bearing structure, and the planetary gear box Embedded in the main body, the gear ring is closely matched with the main body; the encoder shaft is closely matched with the first layer of sun gear in the planetary gearbox, and the power is input from it, and the output shaft of the planetary gearbox is closely matched with the magnet holder, and the magnet holder is placed on the There is a magnet, and the circuit board is fixed to the main body through a pillar. There is a high-precision magnetoelectric chip on the circuit board directly above the magnet to detect the position. The distance between the magnetoelectric chip and the magnet is about 1mm, and the plane is parallel to the magnet plane. The invention uses the planetary gear structure to achieve a specific reduction ratio, and only one magnetoelectric chip can detect the single-turn and multi-turn positions, realizing the function of a mechanical multi-turn encoder. This invention has low cost, easy installation, and reliability High, good durability and so on.

Description

technical field [0001] The invention relates to the field of encoders, in particular to a magnetoelectric absolute encoder with a planetary gear structure, which realizes the function of a multi-turn encoder through the structure of a planetary gear set. Background technique [0002] An encoder is a device that converts angle or displacement information into electrical signals for transmission and communication. Encoders are mainly divided into two types: absolute and incremental. Compared with the incremental rotary encoder, the absolute rotary encoder does not need to count and has unique position data, while the single-turn absolute encoder can only reflect the position within one turn and cannot record the position data of multiple turns. The electronic multi-turn absolute encoders on the market rely on low-power devices to realize the memory of multi-turn data under power-off conditions, read the single-turn and multi-turn position data after power on again, and send t...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a magnetoelectric absolute encoder with a planetary gear structure in order to overcome the shortcomings of the limited service time of the electronic multi-turn encoder and the high cost, high difficulty of debugging, and poor durability of the gear photoelectric multi-turn encode

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