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    • 8. 发明授权
    • Roof support suitable for use in mines
    • 屋顶支撑适用于矿山
    • US4548527A
    • 1985-10-22
    • US622844
    • 1984-06-21
    • Christopher J. BishopGeoffrey M. CumnerJohn H. Waters
    • Christopher J. BishopGeoffrey M. CumnerJohn H. Waters
    • E21D17/02E21D17/05E21D17/054E21D23/06E21D15/14
    • E21D23/066E21D17/02
    • A roof support suitable for use in mines comprises a main roof-supporting structure, a cantilever carried by the structure, an actuator and a link member through the intermediary of which the actuator is connected to one end portion of the cantilever for moving the cantilever between retracted and extended positions. The end portion of the cantilever has projections which come into engagement with an abutment when, upon advancing movement of the actuator, the cantilever reaches its fully extended position. The abutment and projections are so shaped that when they are in engagement they form pivot means about which the cantilever can be tilted. The link member is so formed and so connected to the cantilever that upon further advancing movement of the actuator the cantilever is caused to tilt about the pivot means into a roof-supporting position.
    • 适用于矿山的屋顶支撑件包括主屋顶支撑结构,由结构承载的悬臂,致动器和连杆构件,通过该连杆构件将致动器连接到悬臂的一个端部,以使悬臂在 缩回和延伸位置。 悬臂的端部具有与基座接合的突起,当在致动器的前进运动时,悬臂到达其完全伸出的位置。 邻接和突起的形状是这样的,使得当它们处于啮合状态时,它们形成枢转装置,悬臂可围绕该枢转装置倾斜。 连杆构件如此形成并且连接到悬臂,当致动器进一步前进运动时,使悬臂绕枢轴装置倾斜成屋顶支撑位置。