Magnetoelectric absolute type encoder for planetary gear structure

Abstract

The invention provides a magnetoelectric absolute type encoder for a planetary gear structure. The magnetoelectric absolute type encoder comprises an encoder main shaft, a main body, a strut, a circuit board, a magnet, a magnet supporter and a planetary gearbox, wherein the encoder main shaft is fixed with the main body through a bearing structure; the planetary gearbox is embedded into the main body; the gear ring is tightly matched with the main body; the encoder main shaft is tightly matched with a first layer of solar gear in the planetary gear box; the power is thus input; the magnet supporter is tightly matched onto the output shaft of the planetary gearbox; the magnet is arranged on the magnet supporter; the circuit board is fixed with the main body through the strut; a high-precision magnetoelectric chip is arranged on the circuit board arranged right above the magnet for detecting the position; the distance between the magnetoelectric chip and the magnet is about 1mm; the plane is parallel to the magnet plane. The planetary gear structure is used for completing the specific speed reducing ratio; the single-circle and multi-circle position can be detected by only using onemagnetoelectric chip; the function of the mechanical multi-circle encoder can be realized. The magnetoelectric absolute type encoder has the advantages that the cost is low; the installation is easy;the reliability is high; the durability is high, and the like.

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 encoder. The encoder uses a 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 other advantages

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