| 摘要 |
The present device relates to an air knocker that strikes wall surfaces of a powder storage tank such as a silo, hopper, etc. to prevent the function of the powder storage tank from being degraded. An aim of the present device is to solve the conventional problems by minimizing the impact generated when a magnetic piston returns to a cylinder head of the air knocker after striking. Another aim of the present device is to maintain the striking pressure of the magnetic piston by preventing a clearance at a fixing plate in the cylinder head and thus preventing air loss, and a further aim of the present device is to prevent vibration and noise by minimizing the impact during the return of the magnetic piston. To accomplish the above aims of the present device, a buffering ring is provided in the cylinder head to buffer the pressure generated during the return of the magnetic piston, thus preventing pressure from being generated in the cylinder head by the return of the magnetic piston.
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