As China's leading crane manufacturer, Weihua Group's bridge crane reducer is the core transmission component, which directly affects the operating efficiency, stability and life of the equipment. The following is a detailed technical analysis of Weihua bridge crane reducer/gearbox:
1. Common
crane reducer/gearbox types
QJ series crane-specific reducer
Standard: in accordance with JB/T 8905 (equivalent to German FLENDER technology)
Features: three-stage helical gear transmission, hardened tooth surface (carburizing and quenching HRC58-62), high load capacity, suitable for lifting mechanism and trolley running mechanism.
Speed ratio range: 12.5~100 (common models such as QJRS, QJRD).
Three-in-one reducer motor
Integrated design: reducer + motor + brake integration, compact structure (such as SEW's K series, Weihua's self-made WH series).
Advantages: easy installation, suitable for trolley running mechanism or light crane.
2. Technical features of
Weihua crane reducer/gearbox
Material and process
The gear is made of 20CrMnTi alloy steel, and the grinding accuracy reaches ISO 6 after carburizing and quenching.
The housing is made of high-strength cast iron (HT250) or welded steel structure with good shock resistance.
Seal and lubrication
Double-lip skeleton oil seal + labyrinth seal, oil leakage prevention (IP65 protection level).
Forced lubrication (large reducer) or splash lubrication (small and medium-sized).
Adaptive design
The input shaft and the motor are directly connected through a coupling (plum blossom shape, gear type).
The output shaft can be selected as a solid shaft or a hollow shaft (with a locking disc), which is suitable for Weihua standard wheel set.
