Hoist / Elevator Reducer

Hoist/Elevator Reducer is a core transmission component in vertical transportation equipment such as elevators and construction hoists. Its core function is to convert the high speed of the electric motor into the low speed and high torque output required by the traction sheave or drum, thereby driving the car or cage to operate smoothly and safely. Compared with general industrial reducers, this equipment is specifically optimized for the load characteristics of vertical lifting scenarios (such as frequent starts and stops, impact loads, and precise leveling requirements): it uses high-strength alloy steel gears (such as 20CrMnTi) and undergoes carburizing and quenching treatment, with a tooth surface hardness of HRC58-62, ensuring wear resistance under continuous start-stop conditions; structurally, it often adopts worm gear, planetary gear, or helical gear designs to achieve high torque transmission (transmission efficiency of 90%-98%) and precise speed ratio control (range 5:1 to 60:1) in a compact space. Its core advantages lie in its high-rigidity housing structure to resist impact vibrations during lifting, low backlash design (≤1 arc minute for precision models) to ensure leveling accuracy, and integrated overload protection mechanisms (such as friction plate safety brakes) to prevent overload operation. In addition, the reducer's internal lubrication system uses circulating oil lubrication or long-life grease, adapting to the long-term continuous operation requirements of elevators. Some models have an IP65 protection rating, suitable for dusty environments such as construction sites.

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Product Description

Performance Characteristics
High Torque Density and Compact Transmission Structure: Through planetary gear or worm gear splitting design, it provides 30%-50% higher torque output than standard reducers within the same volume, making it especially suitable for narrow spaces such as elevator shafts or machine rooms.
Precise Speed Control and Smooth Operation: Precision grinding technology combined with optimized tooth profile allows backlash to be controlled within ≤1 arc minute (precision type), ensuring no vibration during car start-up, stopping, and leveling, with noise levels below 65dB, improving passenger comfort.
High Safety and Reliability: Integrated mechanical overload protection (such as torque limiter) and reverse self-locking function (worm gear type) prevent overload slippage; the brake meets safety standards (such as 125% rated load braking capacity), ensuring safe stopping of the car in the event of a sudden power outage.
High efficiency and energy saving: The multi-tooth meshing design of worm gears or planetary gears reduces friction loss, achieving a transmission efficiency of over 95% (up to 98% for permanent magnet synchronous gearless systems), reducing energy consumption by 30%-40% compared to traditional asynchronous motors.
Long lifespan and low maintenance requirements: Gears are made of carburized and quenched alloy steel, and the housing is a cast iron or cast steel welded structure, with a design life exceeding 100,000 hours; sealed bearings and a centralized lubrication system reduce maintenance frequency and are suitable for continuous operation under high loads.

Technical configuration and adaptability:
Reducer types: Includes worm gear reducers (strong self-locking, suitable for low-speed elevators), planetary gear reducers (high torque density, used in high-speed elevators), and helical gear reducers (smooth and low noise).
Speed ratio range: Single-stage speed ratios cover 5:1 to 60:1, and multi-stage combinations can reach 200:1, adapting to different lifting speed requirements (e.g., 0.3-4.0 m/s elevators).
Installation Method: Supports horizontal or vertical installation, flange connection or direct integration with traction machine units, adaptable to the compact layout of machine-room-less elevators.
Environmental Adaptability: Operating temperature -40℃ to 45℃, protection rating up to IP65, resistant to construction site dust and humidity fluctuations.

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