Structure of manual hoist

When 1 ton manual chain hoist lifting the weight, clockwise drag manual and rotate hand chain wheel; while down, counterclockwise hands pulled the chain, brake block and brake separate, ratchet resting under the effect of the detent, five tooth long axis drive heavy chain wheel running in the opposite direction, so as to smooth dropped weights. 2 ton manual chain hoist generally use the unidirectional ratchet friction disc brake, can automatically brake under load, the pawl and the ratchet wheel are engaged under the action of the spring, ensure the brake work safely. It is safe and reliable, convenient maintenance, high mechanical efficiency, bracelet pull small, lighter weight for carrying and beautiful shape smaller sizes, durable, applicable to factories, mines, construction sites, piers, docks, warehouses and other used to install machinery, lifting goods, especially for the open and no power operation, show its superiority. The main parts of 3 ton manual chain hoist use the steel materials, using 800MPa high strength lifting chain, the material is generally 20M2, medium frequency quenching heat treatment, low wear and corrosion chain; high strength hook, material generally for alloy steel, forging type of hook design to ensure that the slow lifting to prevent overload; in line with European CE safety standards.

此博客中的热门博文

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 additional load

阅读全文

The reason of electrical wire rope hoist does not work after starting

Mainly because of the hoist does not reach to the rated operating voltage, there are generally 3 kinds of situations: 1.Find out whether the power supply system supply power to wire rope electric hoist , generally used test pencil, such as no power supply; 2.The main control circuit of the wire rope electric hoist is damaged, the line is broken or the contact is bad, can also let the hoist motor not be electrified. This situation, need to overhaul the main control circuit. When maintenance, in order to prevent missing phase to burn the motor casused by the main control circuit supply power to three-phase motor, or hoist motor suddenly operate and cause danger, must disconnect electrical wire rope hoist motor from the power supply, only supply power to the main control circuit. Then start and stop switch, check and analyze the working condition of the electric appliance and the line, repair or replace the failed electric appliance or line. When the main control circuit is confirmed

阅读全文

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 sale

阅读全文

WOKAITE

搜索此博客