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The main components of the  single girder EOT crane  is the electric hoist. electric single girder crane has total six movement, while the electric hoist accounted for four, and the main motor to control the upper and lower movement of the electric hoist, so can be seen that the electric hoist is important in the electric single beam crane.The main  overhead crane motor  of the 5 tons rated lifting weight of single girder crane is 7.5KW , the improper use in the long-term use will sometimes damage the main motor, such as outdoor running without rainproof causing the motor short circuit; such as lack phase operation causing the motor burned; and such as motor wear causing rotor bearing damage and so on. In this case, we need to replace or remove the motor, how to remove the main motor of the  electric cable hoist  hanging on the crane? The steps are as follows: 1.Preparation work, scaffolding or ladders, two  lever hoists , other related tools; ...

It is great significance for safe production and improvement of production efficiency to select the appropriate fetching device. Due to the double girder bridge crane has a wide variety loading and unloading of objects, there are pieces, scattered and liquid, and so on, their physical properties and characteristics are so different. In order to adapt to load and unload all kinds of goods, commonly used extraction device as grab, electromagnetic sucker, rings, bar, clamp, vacuum suction, hopper, bucket and bearing beam, in addition to the special container spreader and other special tools. Hook is the most widely used device for double girder bridge crane. Grab bucket is mainly used for loading and unloading a large number of bulk materials, but also used to grab the logs. Grab bucket is a kind of automatic fetching device, and its grasping and discharging action is controlled by the driver in the driver’s cab, without the assistance of the auxiliary personnel, which greatly improves...

Before the use of the chain fall hoist will have a simple operation test, the following WOKAITE introduce the operation steps for you in detail: 1.Press the “down” button, drive the chain fall hoist down until the limit position, the motor will automatically stop. 2.Press the “up” button, until the chain is fully retracted into the chain bag, and the motor stops running. 3.Check the lubrication of the load chain. The load chain has already lubricated before delivery, but it’s probably going to dry up in transit, any ready-made lubricating oil can be used to lubricate the lifting chain, we recommend that you keep a small amount of lubricating oil in the chain in the bag, so that the chain can be immersed in the lubricating oil. 4.When the load chain of the  chain electric hoist  is double chain or multi chain, it is strictly prohibited to turn down the lower hook from the chain to avoid danger. 5.Check the direction of the chain, all the welding points should be in the same di...

The  electric chain hoist  which is most widely used light lifting equipment has the characteristics of repeated short run, frequent lifting, braking and reverse current, overload, multi metal dust and dust operating environment, strong vibration. Therefore, in order to meet the needs of electric hoist, as its main power source of the  crane motor  should have the following characteristics: 1.First, the  electric hoist motor  should have characteristics of stronger intermittent cycle working than the ordinary industrial motor, according to the load duration, the number of contacts and the number of times as an important parameter of motor selection. 2.Electric  crane duty motor  should have better lifting torque and overload capacity. 3.Electric hoist motor due to smaller rotor inertia, greater rotor length diameter ratio, less sight braking. 4.Electric hoist motor should have the maximum safe speed which is several times the rated speed, gener...

1.Can not eliminate the slip phenomenon of trolley. Some repair work that need frequent refueling to make electric trolley rolling on the I-steel track flexibly, in fact as long as put some ZG-3 calcium based grease on the wheel (once every 6 months). Too much oil on the track is easy to adsorb foreign body, leading to wheel slip, affect the normal use of  electric chain block . When the trolley slips, it should be timely to remove the cover on the track, must not add oil to the track. 2.Improper handling of wire rope winding. Wire rope winding is one of the common faults of  electrical chain block , when some maintenance personnel found this kind problem, try to continue to rotate the drum to loosen the wire rope, the result is to caused damage to the wire rope. The right way is to remove the rope guide first, rotate the drum to straighten out the wire rope, and then re install the rope guide. 3.Speed reducer run lack of oil. It will increase noise. When the speed reducer ma...

The safety inspection of  overhead EOT crane  in order to ensure the safe operation, during the operation of the need for a number of safety routine inspection, inspection items and key points are as follows: 1.The lifting height limiter, the travel limit switch and the interlock mechanism are normal, safe and reliable. 2.The main components meet the safety requirements: opening increase less than 15% of the original size, the torsional deformation is less than 10%; the 50% plate hook bushing wear is 5% smaller than the original size, the plate hook spindle wear less than 5%, no peeling, burr, welding. 3.Hook rack and pulley without obvious defects. 4.The wear and corrosion of the surface of the steel wire rope is less than 40% of the diameter of steel wire, broken wire within a twist less than 10% of the total number, no break, no thinning, no core extrusion, no blind angle twisting, no extrusion deformation, no annealing, no burning phenomenon. 5.The clips,clamp and wedge c...

The use rate of  electric chain block hoist  in china is very high, there are a lot of people do not understand how it works,  WOKAITE  tell you the relationship between the components of electric hoist. First of all, in the process of production, the electric hoist can participate in the specific process operation, its basic structure is similar to that of the ordinary overhead electric hoist, but it also has a special working mechanism or device on the electric hoist. This kind of electric hoist is characterized by frequent use, bad condition and high working level. Four truss type structure is composed of four pieces of plane truss combined into a closed space structure, generally install the platen in the upper horizontal truss surface, light weight, high stiffness, manufacturing is complex and has less production. Truss structure is similar to bias rail box girder, composed of four pieces of steel plate to form a closed structure, in addition to the main web is...

1.Fix the hook of the  lever hoist  with objects reliably , the chain hook hang the heavy item reliably. 2.Weight lifting. The knob is pulled to a position of the label “up”, and then pull the handle reciprocally, the load rise steadily. 3.Drop down weight. Turn the knob to the “down” position, and then pull the handle with the reciprocating, the load rise drop down steadily. 4.Hoist hook position adjustment. When no-load, the knob is pulled to the “0” position, and then rotate the handwheel, the hook chain can be adjusted on the lower position. This is available from the ratchet pawl, hand chain pull easily and quickly adjust the chain hook position. WOKAITE is a professional manufacturer of  3 ton lever chain hoist ,high quality and reasonable price,serve for B2B customers,looking forward to get your inquiry.

Family decoration and other fields often use  single-phase hoist . Let WOKAITE introduce you how to connect  single phase hoist . Three connect lines of the  electric hoist motor , one is public end line, the other two are the winding lines. If it is not divided into main and auxiliary line, the resistance of the two winding lines is as large as the the public end line; if it is divided into main and auxiliary line, the resistance of the main winding line and the public end line is greater than the auxiliary winding and a public end line. In addition, can also be judged based on the number of motor outlet line, if it is divided into main and auxiliary line and is required to be positive, then the number is at least 4. If it is 3, that is, it is not divided into main and auxiliary line.