Gear-type magnetic multi-turn encoder

Abstract

The invention relates to a gear-type magnetic multi-turn encoder, and belongs to a multi-turn encoder. A main body is fixedly connected with a first housing, and a second housing is fixedly connected with the first housing. A PCB is fixedly connected with the main body, and a gear group is fixedly connected with an eccentric wheel, and is disposed in the main body. A first eccentric wheel magnetic resistance receiver and a second eccentric wheel magnetic resistance receiver are respectively in fixed connection with the main body at an outer side of the eccentric wheel, and the distances from the first and second eccentric wheel magnetic resistance receivers to a rotating shaft hole are the same. The first and second eccentric wheel magnetic resistance receivers are disposed in the radial direction of a rotating center, and are located in the same plane as the eccentric wheel. Parts, at the tooth crests of all gears in the group, of the main body are fixedly connected with the magnetic resistance receiver group, wherein all magnetic resistance receivers in the magnetic resistance receiver group are placed in the radial direction of the rotating center, and are located in the same plane with the respective gears. The encoder is advantageous in that the encoder is novel in structure, is strong in capability of resisting magnetic interference, employs an integrated sealed structure, achieves the miniaturization, and is suitable for miniature motors and small-size robots.

Description

technical field [0001] The invention belongs to a multi-turn encoder. Background technique [0002] At present, the multi-turn encoders on the market are mainly divided into two categories: photoelectric and magnetic. [0003] Photoelectric encoder: Its internal optical system has high requirements on the environment and is easily corroded by oil. The grating disc is made of glass, which is easily affected by external vibrations, shocks and other environments, and the code disc is broken. And it needs to be sealed. [0004] Magnetic encoder: The magnetic encoder uses a cutting magnetic field to obtain pulse signals. There is no optical system inside, so it has low environmental requirements and will not be affected by dust, oil, etc. And it has higher shock and vibration resistance. Common magnetic encoders are mostly magnetic ring type: a magnetic ring is fixed on the outside of the rotor, and the induction device is placed in the radial direction of the magnetic ring a...

AI Technical Summary

Problems solved by technology

[0006] The invention provides a gear-type magnetic multi-turn encoder to solve the problems of low precision, complex structure, poor anti-electromagnetic interference ability and inability to realize miniaturization existing in the current magnetic multi-turn encoder

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