Driving mechanism

Abstract

The invention provides a driving mechanism, which comprises a static iron core, a movable iron core, an upper drive coil, a permanent magnet and a lower drive coil, wherein the static iron core is provided with an inner cavity, the inner cavity comprises an upper end surface, a lower end surface and a cylindrical movable iron core moving space positioned between the upper end surface and the lower end surface, the movable iron core can be movably arranged in the movable iron core moving space and is at least provided with a first working position, and the upper drive coil, the permanent magnet and the lower drive coil are respectively sleeved on the outer part of the movable iron core moving space. In the first working position, a first annular boss and a fourth annular boss are mutually matched to form a magnetic circuit in the radial direction, the upper end surface of the movable iron core is far away from the upper end surface of the inner cavity, and the lower end surface of the movable iron core is far away from the lower end surface of the inner cavity.

Description

technical field [0001] The invention relates to the field of drive equipment technology or electrical control, in particular to a drive mechanism, especially a tristable permanent magnet operating mechanism. Background technique [0002] Existing permanent magnet operating mechanisms are mainly divided into bistable permanent magnet mechanisms and monostable permanent magnet mechanisms in principle, the principles of which are briefly introduced below. [0003] Firstly, the principle of the bistable permanent magnet operating mechanism is introduced. The so-called bistable state refers to the two positions of the moving iron core at the end of the stroke, which can be maintained without mechanical locks. figure 1 It is a schematic diagram of the structure and principle of an existing bistable permanent magnet operating mechanism, such as figure 1 As shown, the bistable permanent magnet operating mechanism has seven main parts: 11 is the static iron core, which provides the...

AI Technical Summary

Problems solved by technology

[0009] The present invention provides a driving mechanism to solve the problems of complex structure and inaccurate control caused by the switching and maintaining of the three working positions in the prior art, which requires the assistance of springs and other components, especially to solve the problem that the working position is in the The middle position in the static iron core needs the assistance of springs and other components to achieve control

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