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1. 发明授权

US4258832A Automatically resetting safety brake 失效
标题翻译：自动复位安全刹车
公开(公告)号：US4258832A
公开(公告)日：1981-03-31
申请号：US81048
申请日：1979-10-02
申请人： James T. Thorp
发明人： James T. Thorp
IPC分类号： B66B5/04 , B66D5/14 , F16D59/00 , B60T7/12
CPC分类号： B66D5/14 , B66B5/048 , F16D59/00
摘要： Antifrictional screws are used to permit the resetting of safety brakes of the type used in hoists. As in prior brakes, centrifugally operated dogs connect braking members, but in the present brakes the dogs also engage actuating members of the antifrictional screws, the screws being rotatable independently of their respective braking members. The dogs can be disengaged from the actuating members by merely operating the usual controls to raise cages of the hoists. The antifrictional screws in one embodiment are then free to be turned automatically independent of the rate of rotation of a braking member by force of usual spring washers disposed between the screws and respective braking members until the brakes are normally released. In modified types, dogs or pawls for controlling the amount of braking continue to engage respective actuating members for controlling rate of rotation of the screws until the cages have been raised sufficiently to release the brakes. For testing purposes, the dogs have easily operated rods associated with them for pushing outwardly the dogs at speeds below the usual speeds required for operation. In heavy-duty hoists, second dogs positioned to clear the actuating members are included to provide a moderate amount of braking in an ascending direction.
摘要翻译：安全螺钉用于允许复位起重机中使用的安全制动器。如在先前的制动器中，离心操作的狗连接制动构件，但是在当前的制动器中，所述制动器还接合所述摩擦螺丝的致动构件，所述螺钉可独立于它们各自的制动构件旋转。通过仅仅操作通常的控制来提升起重机的笼子，可以将狗从致动件脱离。一个实施例中的防摩螺钉随后可以通过设置在螺钉和各个制动构件之间的通常的弹簧垫圈的力而自动地与制动构件的旋转速率自动转动，直到制动器正常释放。在修改类型中，用于控制制动量的制动器的爪或爪继续啮合相应的致动构件，用于控制螺杆的旋转速度，直到保持架已经被充分升高以释放制动器。为了测试目的，狗可以轻松操作与它们相关联的杆，以低于操作所需的通常速度的速度向外推动狗。在重型起重机中，包括定位成清除致动构件的第二杆，以在上升方向上提供中等量的制动。

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