Development of Motor-Driven Vibration Linear Feeder Balanced Transmissive Force

Development of a vibration feeder was performed as one application of a vibratory machine with a self-contained vibration-reducing function by means of interference of transmissive force. The most important conditions for a vibration proof of a vibratory machine are compatibility of functions which oppose each other, reduction of transmissive force on the machine base and amplification of vibration on the body. This study deals with application of the proposed design to the feeder. The machine consists of coupling of a pair of one-degree-of-freedom mass-spring system. An excitation spring is devided as a part of a coupling spring for generation of excitation force on the two bodies. One end of the spring is excited by harmonic displacement with a reciprocating mechanism such as a crank. In this paper, we present vibration characteristics with full consideration of transmissive force and the optimum design procedure of the system. The transmissive force is reduced by 30 dB in the linear feeder which is excited by the excitation spring in the first trial