Inner armature type high precision positioning electromagnet

Abstract

The invention discloses an inner armature type high precision positioning electromagnet which comprises a shell, an armature, a coil, an end cover and a positioning shaft. One end of the shell is sealed through the end cover, three supporting assemblies are arranged at the end, far away from the end cover, of the shell, bearings of the three supporting assemblies are all tightly attached to the positioning shaft, and the positioning shaft can move freely in the axial direction of the positioning shaft. Two supporting assemblies are fixed supporting assemblies, another supporting assembly is a movable supporting assembly, and a kidney-shaped hole is formed in a supporting block of the movable supporting assembly in the length direction of the supporting block. A screw sequentially penetrates through a pressing plate and the kidney-shaped hole and then is connected with the shell. A compressed spring is arranged at the end, far away from the positioning shaft, of the movable supporting assembly, one end of the compressed spring is fixedly connected with the shell, and the other end of the compressed spring is tightly pressed on the supporting block of the movable supporting assembly. By means of the inner armature type high precision positioning electromagnet, gap variation caused by temperature variation can be compensated automatically, and high positional accuracy and low temperature drift are achieved.

Description

technical field [0001] The invention relates to an electromagnet, in particular to an inner armature type high-precision positioning electromagnet. [0002] Background technique [0003] An electromagnet is an industrial device that uses a energized coil to generate a magnetic field. The magnetic field magnetizes the iron core and the armature in it. The magnetized iron core and the armature attract each other to generate electromagnetic attraction, and finally push the armature to move. It is widely used in many mechanical equipment and electronic devices, such as electromagnetic relays, electromagnetic power-off brakes, electromagnetic chucks of cranes, locking electromagnets, etc., all of which belong to the category of electromagnets. [0004] In the prior art, the axial movement unit of the electromagnet for positioning is often in the form of a linear sliding bearing or a ball linear bearing, both of which have difficulties in ensuring the coaxiality of the front and ...

AI Technical Summary

Problems solved by technology

[0006] In view of the above-mentioned deficiencies existing in the prior art, the purpose of the present invention is how to solve the problems of high assembly accuracy requirements of existing electromagnets, large variations in positioning accuracy with temperature, poor repeatability, and easy jamming, and provide an inner armature type high-precision electromagnet. The positioning electromagnet can automatically compensate the gap change caused by temperature changes, and has high positioning accuracy and low temperature drift

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