| 摘要 |
A vibrator for removing air bubbles in concrete is provided to increase sealing capacity not to let alkali-containing substances of concrete, water and air through by outputting stable oscillation frequency with a vibrating cable and to prevent overload of a motor by reducing the rotational frequency provided from the motor and thereby redoubling torque. A vibrator(100) for removing air bubbles in concrete comprises a driving unit(110) having a DC brush motor(112) built-in to impart high torque to a vibrator to increase efficiency at air bubble removal work with low noise, a speed reducing unit(120) having a through hole(121c) and a housing space(121b) engaged with an electronic gear(113) and a reduction gear(122) to reduce the rotational frequency of driving force provided by the motor and to output the torque increased by a driven shaft(122a) fixed to the center of the reduction gear, and a vibrating cable installed to the speed reducing unit to set up vibrations and converting the torque of a cable into repeated vibration force by combining a coupling(131) to the front of a coupling flange(121a) to make the driven shaft located in the coupling and connected with one side of a flexible cable, and combining a vibrating rod to the other side of the cable, wherein a body formed by coupling the driving unit and the speed reducing unit is installed at a mounting bracket(140) to maximize portability of the vibrator.
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