| 摘要 |
<p>A dust collector for effectively collecting broken pieces and dust particles of concrete in a construction site. The dust collector includes a bowl-shaped dust catching body (14, 72) having a large opening at a first end thereof and a working port (15, 73) at a second end thereof opposite to the large opening. The working port is positioned at a center of the second end of the dust catching body, and permits a crushing tool (62) to move in the working port or move away from the working port. The dust collector also includes an air closing mechanism (16, 74) fixed to the working port for permitting the crushing tool to enter therethrough while substantially preventing air to flow through the air closing mechanism, a sealing mechanism (27, 29) fixed to a periphery of the large opening of the dust catching body wherein the sealing mechanism is made of a flexible material and contacts a crushing operation surface (B, G), and a dust discharge mechanism (22, 77) which communicates with the dust catching body for sucking air from inside the dust catching body. The large opening of the dust catching body is directed to and brought into contact with the crushing operation surface by way of the sealing mechanism. Air in a space (D, F) defined between the dust catching body and the crushing operation surface is sucked by the dust discharge mechanism, and dust generated when the crushing operating surface is crushed by the crushing tool that is inserted through the air closing mechanism is discharged by the dust discharge mechanism. <IMAGE></p> |
