Concept analysis of electric hoist

Definition and Core Features

Electric hoist is an electric lifting equipment that uses an electric motor as its power source and achieves vertical lifting, horizontal movement, or precise positioning of heavy objects through mechanical transmission devices. Its core features include:

Electric drive: replacing human labor, achieving heavy, high-frequency, long-distance lifting operations with significantly higher efficiency than manual hoists.

Modular structure: It integrates modules such as motors, reducers, drums/sprockets, brakes, control devices (such as button boxes, remote controls), limiters, etc., making it easy to maintain and upgrade.

Intelligent control: supports wired/wireless remote control, PLC programming control, variable frequency speed regulation, overload protection, limit automatic shutdown and other functions to adapt to complex working conditions.

Classification system

According to the transmission method:

Wire rope electric hoist: It can be lifted by winding the wire rope, with a wide lifting capacity range (0.5 tons to hundreds of tons), suitable for large-span and high head scenarios.

Ring chain electric hoist: It adopts high-strength alloy steel ring chain transmission, with small volume and light weight, suitable for narrow spaces or frequent lifting operations.

By operating mode:

Fixed type: Installed on a fixed bracket or track, only capable of vertical lifting.

Running type (electric single beam/double beam crane matching): equipped with a running trolley that can move horizontally along the track to achieve the transfer of heavy objects in three-dimensional space.

According to special functions:

Explosion proof electric hoist: used in flammable and explosive environments (such as chemical plants and oil depots), the shell adopts explosion-proof design, and the motor and control box meet explosion-proof standards.

Low clearance electric hoist: By optimizing the structure (such as flat drum, built-in motor), the equipment height can be reduced to adapt to low rise factories or space limited scenarios.

Dual speed/variable frequency electric hoist: supports lifting speed adjustment (such as fast lifting/slow precise positioning), improving work efficiency and safety.

Structure composition and working principle

Motor: As the power core, a conical rotor motor or a side magnet brake motor is usually used, which has both driving and braking functions.

Reducer: Reduce the motor speed through gear transmission, increase the output torque, and achieve heavy-duty lifting.

Drum/Chain Wheel: A winding device for steel wire ropes or ring chains, which is used in conjunction with guide pulleys to achieve vertical movement of heavy objects.

Brake: Automatically holds the brake in case of power failure or overload to prevent heavy objects from falling and ensure safe operation.

Control device: including button box, remote control device or PLC control system, realizing functions such as lifting, lowering, left and right operation, emergency stop, etc.

Safety devices: upper/lower limit switches (to prevent tipping or bottoming), overload protection devices (such as thermal relays, electronic limiters), emergency stop buttons, etc.

Application scenarios and advantages

Industrial production: widely used in factories, warehouses, docks, logistics centers and other scenarios, for equipment installation, cargo lifting, material handling and other operations.

In the field of architecture, it is used for lifting steel bars, formwork, prefabricated components, and vertical transportation of construction materials for high-rise buildings on construction sites.

Special environment: Explosion proof electric hoist is suitable for flammable and explosive places such as petroleum, chemical, pharmaceutical, etc; Low temperature resistant electric hoist can work stably in an environment of -40 ℃, suitable for cold chain storage or outdoor operations in northern winter.

Advantage comparison: Compared with manual hoists, electric hoists have the advantages of large lifting capacity, easy operation, high efficiency, remote control, and are suitable for heavy loads and high-frequency operations; Compared to large cranes such as bridge cranes and gantry cranes, electric hoists have advantages such as small size, low cost, flexible installation, and easy maintenance.

Safety precautions

Installation and commissioning: Professional personnel are required to install according to the instructions to ensure the strength of the load-bearing structure, the straightness of the track, and the correctness of electrical wiring. After installation, no-load, static load (125% rated load), and dynamic load (110% rated load) tests are required.

Operating standards: Overloading is strictly prohibited, and diagonal pulling, lifting, or impact loads are prohibited. Operators must undergo professional training, be familiar with equipment performance and operating procedures, and non professionals are strictly prohibited from operating.

Maintenance: Regularly inspect the wear and tear of key components such as motors, reducers, brakes, chains/wire ropes, and lubricate and replace vulnerable parts in a timely manner. When the equipment is idle, it should be stored in a dry and ventilated environment to prevent rust or electrical failure.

Safety protection: Warning signs should be set up in the work area, and safety fences or protective nets should be equipped. When working at heights, it is necessary to wear safety belts and install anti fall devices (such as safety ropes and anti fall devices).

development trend

Intelligence: Integrating IoT, sensors, and big data technology to achieve real-time monitoring of equipment status, fault warning, remote control, and intelligent scheduling.

Energy saving: Adopting efficient motors, variable frequency speed regulation, and energy feedback technology to reduce energy consumption and improve energy efficiency.

Modularization and Customization: Through modular design, rapid assembly and functional expansion can be achieved, and electric hoists with special specifications (such as explosion-proof, low-temperature resistant, and low clearance) can be customized according to customer needs.

Greenization: Adopting environmentally friendly materials, low-noise design, and recyclable structures to reduce environmental impact and meet sustainable development requirements.

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