A linear voice coil motor

Abstract

Provided is a linear voice coil motor which comprises a motor housing, a magnet, a yoke, a coil frame, a coil, a leaf spring, and a compression spring. The leaf spring comprises an inner reed loop, an outer reed loop, and a reed filament connected with the inner reed loop and the outer reed loop. The outer reed loop is coupled to the yoke. The inner reed loop is coupled to the coil frame. The coil frame and the yoke are in radial connection through the leaf spring. The compression spring is disposed under the coil frame and forms elastic support on the coil frame in the axial direction. The coil is fixed to the coil frame and may motion relative to the magnet and the yoke in the axial direction when alive. The linear voice coil motor has advantages of large radial stiffness, resistance to axial impact, high motion precision, simple structure, low dynamic load, and steady operation, and can be widely used in industrial automation fields and high precision control occasions.

Description

technical field [0001] The invention relates to the field of electromechanical integration products, in particular to a linear voice coil motor. Background technique [0002] Voice coil motor has the advantages of simple structure, low maintenance cost, stable operation, small size, simple drive, flexible control, large thrust, small motion trajectory error, etc. In addition, in recent years, due to sensor technology, electronic component technology, rare earth magnet sintering The continuous improvement of technology and control algorithm makes the voice coil motor continue to break through its own limitations, and the scope of use is becoming wider and wider. As a special drive motor, the voice coil motor plays an important role in the field of modern industrial control. It is widely used in high-precision machine tool anti-shake, electronic component production platform, lithography equipment, aerial photography, large telescope matrix, robot and Various high-precision c...

AI Technical Summary

Problems solved by technology

[0004] There is a gap between the mover and the stator of the traditional voice coil motor. The solution to this problem is usually to add other precision guiding equipment such as linear guides, screws, pistons, etc. to reduce the motion error caused by this gap as much as possible. However, these practices will also bring defects such as increased load, complex mechanism, and difficult maintenance; at the same time, because the design of the magnet structure is not reasonable enough, it causes waste of magnets and uneven magnetic density in the air gap.

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