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2. 发明授权

US4655327A Impeller type descent slowing device 失效
标题翻译：叶轮式下降减速装置
公开(公告)号：US4655327A
公开(公告)日：1987-04-07
申请号：US666764
申请日：1984-10-31
申请人： Hisatsugu Tomioka , Tazuo Waki , Hiroyuki Sugaya
发明人： Hisatsugu Tomioka , Tazuo Waki , Hiroyuki Sugaya
IPC分类号： A62B1/10 , A62B1/12 , F16D57/02 , F16D57/00 , B66D3/04
CPC分类号： F16D57/02 , A62B1/12
摘要： A descent slowing device is disclosed that includes a housing having an input driving shaft and a driving pulley fitted thereon and accommodating therein a gear train and an impeller adapted to be driven through the gear train by a driving pulley about which is trained a rope or line. When one end of the line descends owing to a load acting thereon to rotatively drive the driving pulley and hence the impeller, the rotation of the impeller is restrained by rotation control oil or similar viscous fluid in which the impeller is immersed, thereby controlling the descent of the load at a constant slow speed. According to the invention, the impeller comprises four blades, the rotating speed ratio of the impeller to the input driving shaft being more than 40:1. Moreover, the driving pulley is formed with a rope receiving groove comprising line abutting projections and non-contact recesses alternately arranged. There are provided a stationary pulley and pendulum pulleys, the line passing between the pendulum pulleys, respectively, and the stationary pulley to cause a frictional compression of the rope between one of the pendulum pulleys and the stationary pulley. Descent is thus controlled if the load is very large, and line slippage is avoided. With the above arrangement, the device according to the invention operates smoothly and securely even after long unused periods of time, under continuous load conditions, and at high or low temperature conditions.
摘要翻译：公开了一种下降减速装置，其包括具有安装在其上的输入驱动轴和驱动皮带的壳体，其中容纳有齿轮系和叶轮，该齿轮系和叶轮适于通过驱动皮带轮驱动，所述驱动皮带轮被训练了绳索或线。当线路的一端由于作用在其上的负载而转动地驱动驱动皮带轮和叶轮时，叶轮的旋转被旋转控制油或其中浸入叶轮的类似粘性流体所限制，从而控制下降的负载以恒定的慢速。根据本发明，叶轮包括四个叶片，叶轮与输入驱动轴的转速比大于40:1。此外，驱动滑轮形成有包括交替布置的线接触突起和非接触凹部的绳索容纳槽。提供了一个固定皮带轮和摆锤皮带轮，分别通过摆动皮带轮和固定皮带轮之间的线路，使得绳索在一个摆动皮带轮和固定滑轮之间产生摩擦压缩。如果负载非常大，则可以控制下降，并避免线滑。利用上述结构，即使在长时间不使用的时间段，连续负载条件下，以及在高温或低温条件下，根据本发明的装置也能平稳且可靠地运行。

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