OPENTECHNICAL PUBLICATION
OT-2026-000003419

Magnetic gripper

Published: 2026-09-15T20:25:27.346273Z
Permanent URL: https://opentechnical.org/p/OT-2026-000003419
Categories: Lifting, Positioning & Manipulation > Hoists and Cranes

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ABSTRACT

A magnetic gripper avoiding the disadvantages of the well-known devices of
reduced lifting capacity, increased electric power consumption and small
gripping force finds application in mechanical engineering for the
transportation of ferromagnetic materials. The device has a U-shaped casing of
magnetic soft material, at least two pairs of permanent magnets, one of their
ends resting on the casing and the other on a common pole terminal enveloped
in a neutralizing winding and all magnets are enveloped by a magnetizing
winding. The magnetic gripper can lift thick sheets and packs of thin sheets
when short-time current pulse of the magnetizing winding is fed and the
permanent magnets are magnetized in one direction, the magnetic flux formed is
collected in the common pole terminal. To free the sheets, a current pulse of
the common neutralizing winding is fed and the direction of magnetization is
reversed. For the regulation of the gripping force in some sectors of the
poles, the magnetic flux is summed and in others is subtracted, thus achieving
changes of the gripping force on a wide range with reduced energy consumption.

1. Drawings

[0001] Sheet 1.

[0002] Sheet 2.

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OpenTechnical publication OT-2026-000003419
Published 2026-09-15T20:25:27.346273Z
https://opentechnical.org/p/OT-2026-000003419