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1. 发明授权

US4103873A Overload protection apparatus for hoisting machine 失效
标题翻译：起重机过载保护装置
公开(公告)号：US4103873A
公开(公告)日：1978-08-01
申请号：US778934
申请日：1977-03-18
申请人： Isao Sato , Shigenori Gomi , Mitsuyuki Furuichi
发明人： Isao Sato , Shigenori Gomi , Mitsuyuki Furuichi
IPC分类号： B66D1/58 , B66D1/00
CPC分类号： B66D1/58
摘要： The disclosure relates to an overload protection apparatus for hoisting machines such as rope hoists or chain blocks. One gear incorporated in the reduction gear train of the hoisting machine is composed of an outer and an inner gear units between which torque is transmitted through resilient means acting therebetween. The resilient means are adapted to be compressed, upon receipt of an excessively large torque, i.e. in case of an overload, to allow a relative movement in the direction of rotation between the outer and the inner gear units. The relative movements of the gear units in the direction of rotation is then converted into a movement in the direction of thrust. Detecting switch is provided for opening an electric circuit for lifting, upon detecting the movement in the direction of thrust, thereby to stop the lifting operation.
摘要翻译：本公开涉及一种用于起重机例如绳索葫芦或链条块的过载保护装置。结合在曳引机的减速齿轮系中的一个齿轮由外部和外部齿轮单元构成，在该齿轮单元之间通过作用在其间的弹性装置传递扭矩。弹性装置适于在收到过大扭矩时，即在过载的情况下被压缩，以允许在外齿轮单元与内齿轮单元之间的旋转方向上的相对运动。齿轮单元在旋转方向上的相对运动然后被转换成沿推力方向的运动。提供检测开关，用于在检测到推力方向上的运动时，打开用于提升的电路，从而停止提升操作。

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