In depth analysis of Low Clearance Electric Hoist

Core Definition and Core Values

Low clearance electric hoist is a lifting equipment designed specifically for limited height spaces. By optimizing the mechanical structure and transmission system, it significantly reduces the overall height of the equipment while maintaining lifting capacity, breaking through the traditional dependence of lifting equipment on factory height. Its core value lies in:

Space utilization rate increased by 30% -50%: an additional layer of work area or three-dimensional shelves can be arranged in traditional factories

Reduce investment costs by more than 20%: reduce the height of factory construction or renovation costs

Improve homework efficiency by 15% -25%: shorten lifting path, reduce space avoidance waiting time

Structural and Technological Innovation

Three dimensional space compression technology

Integrated design of drum: adopting multi-layer winding drum, replacing the traditional external drum with an internal one, reducing the vertical height of the equipment (such as CD1 type traditional hoist with a height of 1.2m vs low clearance type with 0.7m)

Motor reducer integration: traditional coupling connection is eliminated, and the height of the motor is reduced by 40% through a direct coupled hard tooth surface reducer

Innovation of rope guide: Using a new type of stepless self-aligning rope guide to achieve uniform arrangement of steel wire ropes in a limited space

Breakthrough in transmission system

Planetary gear reduction technology: transmission efficiency increased to 92% (traditional worm gear is only 65% -75%)

Application of dual speed motor: Switching between light load high speed (8m/min) and heavy load low speed (0.8m/min) through electromagnetic braking and variable frequency speed regulation

Optimization of wire rope ratio: using a 4/1 or 8/1 ratio system to reduce the requirement for drum diameter at the same lifting height

Application scenarios and adaptability

Highly restricted scenario

Old factory renovation: Implementing three-dimensional storage in old workshops with a floor height of less than 6m (traditional requires a floor height of 8m)

Underground space operations: such as pipe lifting during subway shield tunneling construction (with a clearance height of ≤ 4m)

Ship construction: segmented hoisting inside the cabin (cabin height generally<8m)

Industry adaptation matrix

Recommended Typical Application Models in the Industry

Machining precision machine tool loading and unloading (lifting capacity ≤ 5t) LDH-CD1-5t-6m

Logistics warehousing automation three-dimensional warehouse stacker crane supporting LDH-MD1-10t-9m

Wind power manufacturing blade mold lifting (lifting capacity ≥ 20t) LDH-HC type (customized)

Lifting of equipment inside the nuclear island of nuclear power engineering (radiation protection requirements) LDH-EX type (explosion-proof grade)

Selection and usage points

Key selection parameters

Calculation of net clearance: Effective lifting height=Building height - Equipment height - Hook group height - Safety distance (recommended ≥ 0.3m)

Selection of wire rope ratio: For lifting weights ≤ 5t, use a 4/1 ratio, and for weights>5t, it is recommended to use an 8/1 ratio

Protection level matching: IP55 or above is required for humid environments, and fully enclosed for dusty environments

Operational safety regulations

Prohibit overloading: Configure real-time load monitoring system, automatically limit amplitude when overloaded by 10%

Anti sway control: using PLC+variable frequency vector control, positioning accuracy ± 5mm

Maintenance cycle: Check the steel wire rope every 200 hours and change the oil of the reducer every 500 hours

Technological development trends

Intelligent upgrade

Integrate IoT modules to achieve remote monitoring and fault pre diagnosis

Equipped with laser collision avoidance system, automatically avoiding obstacles

Materials Innovation

Using carbon fiber composite material drum, weight reduction of 40%

Develop self-lubricating bearings and extend maintenance intervals to 2000 hours

Energy efficiency breakthrough

Application of permanent magnet synchronous motor, comprehensive energy efficiency meets IE5 standard

Energy feedback system, braking energy recovery rate>80%

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