Mechanical transmission is a kind of, and the key, semicircular key, oblique key function is the same, is the transfer of mechanical torque.
Structure
Longitudinal keyways are provided on the surface of the shaft, and corresponding keyways are provided for the rotating parts on the shaft, which can be rotated synchronously with the shaft. At the same time of rotation, some can also be longitudinal sliding on the shaft, such as gearbox shift gear, etc.
Application examples:
In the brake, steering mechanism. Another is a retractable shaft, composed of an inner and outer tube, the outer tube has an inner tooth, the inner tube has an outer tooth, set together. When used, it can be telescopic in the length direction while transferring the rotating torque.
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