Working principle of lever hoist

Chain lever hoist as the upgraded version of fixed pulley , has all the advantages of the fixed pulley, and the combination of reverse non-return brake deceleration device and chain pulley, symmetrical arrangement of two gear rotating, which is simple, durable and high efficiency.

Manual lever chain hoist by rotate by pulling drag chain and chain wheel, the friction plate ratchet wheel and the brake seat are pressed into one to rotate together, the tooth long axis turn the piece gear, gear shaft and short splined gear. Then, the chain wheel arranged in the splined gear drive the chain, thus smoothly lifting the weights.The friction ratchet one-way brake, can automatically brake under load. Under the action of the spring, the pawl is engaged with the ratchet wheel, brake safety work.

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How to deal with 3 ton electric chain hoist motor overheating

Any machine has the cycle and time of operation, is not suitable for a long time continuous operation. Long time operation will cause mechanical damage and even accidents, but in general if the 3 ton electric chain hoist surface temperature is too high, we need to check what is the reason. Firstly to check whether it is because the electric hoist weight is too large, beyond the 3 ton electric chain hoist rated weight. Overweight operation will make the motor over heating, overload for a long time will cause irreparable damage to the electric chain hoists for sale. Electric hoist motor is not overloaded, but still heating, should check whether the motor bearing damaged; Should also check whether the motor Work according to regulations, which is one of the reasons causing the motor heating. When the electric hoist motor is running, brake clearance is too small, not completely disengaged, causing great friction, while the frictional heating is also equivalent to the additi...

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Cause analysis of the damage of electric hoist rope

Electric drum occurs electric chain block hoist rope breaking phenomenon after the replacement of the drum for a short time, although the rope guide device is vulnerable parts, but in addition, there is an unexplained collapse. Rope guide specifications: unless calibration, can generally be divided into for cast steel and for cast iron, the steel drum rope guide for the lifting height above 12 meters with smaller diameter, cast iron drum rope guide for lifting height below 12 meters with large diameter. After the replacement of the drum of the electric wire rope hoist is not the original component, it may lead to the uneven force of the guide rope, and may be because of the installation procedure or the components do not match. WOKAITE recommends you, if parts damaged, must try to contact the buyer at the time of the original components. The maintenance of explosion proof hoist should be carried out in accordance with GB3836.13, the danger zone r...

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Working level of overhead gantry crane

Overhead gantry crane installation site and the work conditions is vary greatly, the use of lifting capacity and working frequency are also different. In order to use the crane economically and reasonably, it is necessary to choose the appropriate working level according to the working condition of the crane. The working level of the bridge crane is divided into A1 ~ A8, according to the level of the crane and the load state, that is, according to the frequency and load degree of the crane through the calculation to determine. The crane has a certain number of working cycles during its useful life. A working cycle of a travelling gantry crane is to start the process of loading the goods from the beginning to the next. The total number of working cycles represent the utilization of cranes. In order to facilitate the calculation, the total number of working cycles can be divided into 10 categories. 200-400 ton heavy duty travelling overhead gantry crane for ...

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