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在运行中,为了不使电动葫芦的吊钩超出极限位置,引起事故,为此都安装有限位开关,以自动切断电源。用于粉尘比较大场合的电动葫芦,在限位动作过程中,当起重钢丝绳到达极限位置时机械推动限位杆滑动。断开限位开关,达到可靠限位。但复位时,因粉尘影响导致限位开关内部弹簧回弹产生的力克服不了外部由于限位杆摩擦等引起的过大阻力,使限位杆不能可靠复位,往往需要人工操作,很不方便。我们在电动葫芦限位机构的限位杆上套入合适的压缩弹簧(见附
In operation, in order not to exceed the limit position of the electric hoist hook, causing accidents, for which are installed limit switches to automatically cut off the power. Electric hoist for dust larger occasions, in the process of limiting action, when the lifting wire rope reaches the limit position mechanical push limit rod sliding. Disconnect the limit switch to reach a reliable limit. However, when reset, the force generated by the internal spring rebound of the limit switch can not overcome the external resistance caused by the friction caused by the limiter rod, which makes the limiter rod unable to be reset reliably. Therefore, manual operation is often required and inconvenient. We put a suitable compression spring on the limit rod of the electric hoist limit mechanism (see attached