| 摘要 |
PURPOSE: An automatic opening and closing device of a hopper for a shotcrete vehicle is provided to improve the rapidity and stability of maintenance and repair inside a hopper by rapidly and stably opening or closing a grid. CONSTITUTION: An automatic opening and closing device of a hopper for a shotcrete vehicle comprises a rotary shaft(100), a forward and backward motor, a stopper, a limit switch(400), and a brake. The rotary shaft is formed in one side of a grid(13) and is installed in one upper side of a hopper(10). The forward and backward motor is connected to the rotary shaft for opening and closing the grid by rotating. The brake comprises a friction block(510) and a cylinder(520). The brake fixes the rotary shaft with the opened state of the grid at a predetermined angle.
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