A kind of transmission device of motorcutters,It is that the power source output terminal of what motorcutters is equipped with a pedestal,Holding part is equipped in the pedestal,And the what holding part is equipped with the wears groove of connection outside,It is pivoted in the holding part of the what pedestal for the shaft for driving rotation,And one end of the what shaft is equipped with eccentric segment,The axle sleeve of tool Arc Axial bearing surface is equipped in the wears groove of another what pedestal,For installing a drive rod,The transmission leverage is equipped with the sliding section of tool arc surface,It is set in what axle sleeve for placing cunning,And the drive rod stretch through out pedestal outside one end be equipped with for install blade group connecting part,Then link the connecting rod that is pivoted between another end and the eccentric segment of shaft,And when the eccentric segment rotation actuation of what driving shaft,Drive rod is interlocked with connecting rod,And make the past polyslip of straight line path with the sliding section of the Arc Axial bearing surface of axle sleeve guiding drive rod,And blade is made to make the cutting action of shift reciprocately； Thereby,The arc surface of section is slid using the Arc Axial bearing surface guiding drive rod of axle sleeve,Can make drive rod it is smooth make straight line path toward polyslip,To reduce vibration and noise,And the group connecting part of drive rod is utilized,Can easy what more allowing blade replacement,And then reach the Practical Benefit of propose Noboru ease of use.一種動力刀具之傳動裝置，其係於動力刀具之動力源輸出端設有一座體，該座體內設有容置部，且於該容置部設有連通外部之穿槽，於該座體之容置部內樞設供驅動旋轉之軸桿，且於該軸桿之一端設有偏心段，另於座體之穿槽內設有具圓弧軸承面之軸套，以供裝設一傳動桿，該傳動桿係設有具圓弧面之滑移段，以供穿置滑設於軸套內，且該傳動桿穿伸出座體外部之一端設有供裝設刀片之組接部，另端與軸桿之偏心段間則連結樞設一連桿，而於驅動軸桿之偏心段擺轉作動時，即以連桿連動傳動桿，並以軸套之圓弧軸承面導引傳動桿之滑移段作直線路徑之往復滑移，而使刀片作往復位移之切割動作；藉此，利用軸套之圓弧軸承面導引傳動桿滑移段之圓弧面，即可使傳動桿平順的作直線路徑往復滑移，以降低振動及噪音，且利用傳動桿之組接部，即可易於更換刀片，進而達到提昇使用便利性之實用效益。
