Permanent magnet adsorption unit

Abstract

The invention relates to the technical field of adsorption devices. More specifically, the present invention relates to a permanent magnet adsorption unit. The permanent magnet adsorption unit comprises a frame, a permanent magnet assembly, a yoke base, a radially magnetized magnetic core and a reversing assembly capable of driving the magnetic core to rotate. The permanent magnet assembly comprises a plurality of groups of permanent magnets surrounding the periphery of the magnetic core, the plurality of permanent magnets are sequentially connected in a heteropolar manner, the first group ofpermanent magnets and the last group of permanent magnets are mounted on the yoke base, the reversing assembly is connected to the end part of the magnetic core, and the magnetic core, the permanent magnet assembly and the yoke base are all fixed on the frame. The yoke base is used for guiding a magnetic circuit. The magnetic pole direction of the magnetic core is changed through the reversing assembly. The distribution and the flow direction of a magnetic loop among the magnetic core, the permanent magnet assembly and an adsorbed object are changed, so that the external magnetic force of thepermanent magnet adsorption unit is controlled, the permanent magnet assembly arranged on the outer ring of the magnetic core increases the proportion of magnets in the whole permanent magnet adsorption unit, the attraction is large, the weight is light, switching is convenient, and the closed-state magnetic flux leakage is small.

Description

technical field [0001] The present invention relates to the technical field of adsorption devices, more specifically, to a permanent magnetic adsorption unit. Background technique [0002] In production and life, magnets are needed in many fields, ranging from the fixing of a hook to the lifting of magnetic materials such as steel in metallurgy, mining, machinery, and transportation industries. Magnets play an extremely important role. Where the magnetic force needs to be adjusted, an electromagnet scheme is usually used to control the magnetic force of the magnet by adjusting the coil current. However, electromagnets have disadvantages such as complex structure, heavy weight, high cost, and lack of self-locking power-off protection properties. Therefore, solutions such as switchable permanent magnet adsorption devices have been proposed. Chinese patent CN201620481069.5 discloses a magnetic adsorption device, which uses a single magnet to rotate and a yoke base for magnetic...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the disadvantages of the magnet module in the prior art, such as large weight, low suction-to-weight ratio, no power-off protection, and poor switching performance, and provide a permanent magnet adsorption unit with large suction, light weight, convenient switching, and close The state magnetic flux leakage is small, and has the advantages of self-locking properties, etc.

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