When evaluating the quality of European wire rope electric hoists, a systematic analysis should be conducted from five dimensions: design, manufacturing, performance, safety, and cost. Specific quality issues and improvement directions are as follows:

1、 Design dimension

Compact structure:

Advantages: The European wire rope electric hoist adopts a compact design, and the overall size is usually less than half of domestic cranes. It is lightweight, with less wheel pressure shared by the body weight, and has a large effective working space.

Disadvantage: Strict requirements for working conditions, one type of crane can generally only be suitable for one working condition, which is basically a customized type and lacks flexibility.

Low clearance design:

Advantages: By raising the upper limit of the hook, reducing the size of the hook head to the upper edge of the machine, and even compressing it to only one-third of that of domestic cranes, the lifting height is greatly increased.

Disadvantages: When the lifting point approaches its lifting limit, the angle between the steel wire rope will increase, the contact area between the movable pulley and the steel wire rope will decrease, and at the same time, the fixed pulley will fix the force of the inclined sleeve in the horizontal direction, which will also increase significantly, resulting in an increase in the horizontal internal force and posing a test to the stability of the structure.

2、 Manufacturing dimension

Material selection:

Advantages: High quality components are selected, such as high-quality seamless steel pipe drums, high-strength imported steel wire ropes with a tensile strength of 2160N/㎡, etc., with good safety and long service life.

Disadvantages: European devices generally have intellectual property protection, and due to their excellent manufacturing, the finished product prices are relatively expensive.

Processing technology:

Advantages: Advanced processing technology, such as the drum being made of high-quality seamless steel pipes processed by CNC machine tools. The precision machined rope groove is matched with a rope guide, effectively preventing loose and disorderly ropes.

Disadvantage: Some European brands use accessories produced by their own companies, such as motors, reducers, brakes, etc. Once damaged, they can only purchase from their own manufacturers, and the price is relatively expensive.

3、 Performance dimension

Energy consumption:

Advantages: Small power and high-speed motors are often used, with motor speeds generally between 2000 and 3000. The power is generally less than half of domestic cranes of the same tonnage, reducing energy consumption during operation.

Disadvantage: Due to the small lifting power, the speed is relatively low under a certain lifting load.

Stability of operation:

Advantages: Adopting full frequency conversion control, combined with advanced manufacturing technology, the impact during operation is relatively small, and the operation is relatively stable.

Disadvantage: During the running in period, due to the small clearance between newly assembled components and the difficulty in ensuring the uniformity of clearance during assembly, lubricating oil (grease) is not easy to form a uniform oil film on the friction surface, which may lead to early abnormal wear of the parts.

4、 Security dimension

Safety protection device:

Advantages: Equipped with precise gear transmission type limiters, electronic overload protectors and other safety protection devices, the lifting circuit is automatically cut off when the total lifting weight exceeds the rated value, ensuring equipment operation and personnel safety.

Disadvantage: Some European brands' safety protection devices may be incompatible with domestic equipment and require additional attention.

Braking system:

Advantages: Advanced braking systems such as electromagnetic brakes are used to ensure reliable braking.

Disadvantage: The matching problem between the electromagnetic brake and the electric motor may lead to excessive sliding of the brake and the occurrence of hook slipping. This is usually due to electrical wiring personnel not being familiar enough with the performance and electrical control of European electric hoists, or wiring problems with the brake rectifier module.

5、 Cost dimension

Purchase cost:

Disadvantages: The price of European wire rope electric hoists varies depending on factors such as lifting capacity, brand, and configuration, but generally speaking, the larger the lifting capacity, the higher the price; The higher the brand awareness, the higher the price. Taking a 5-ton European electric hoist as an example, the market price is roughly between 30000 and 80000 yuan.

Maintenance cost:

Disadvantage: Due to European brands using accessories produced by their own companies, once damaged, they can only purchase from their own manufacturers, and the price is relatively expensive. In addition, the after-sales service of some European brands may not be timely or comprehensive enough, which increases maintenance costs.

The main equipment produced by Hebei Makita: stage electric hoist, electric chian hoist, wire rope electric hoist，Hand chain hoist, lever hoist, pneumatic hoist and other lifting equipment