The core of the milling machine reducer is gear meshing, speed reduction, speed reduction and torque increase, and is used in conjunction with the milling machine spindle/feed transmission.
1. Basic principles
The motor has high-speed and low-torque input → multiple sets of gear pairs of large and small gears mesh alternately: the small gear drives the large gear, reducing the speed and amplifying the output torque, matching the low-speed and large torque required for milling machine cutting.
Driving pinion gear: few teeth, high speed; driven large gear: large number of teeth, low speed, relying on tooth surface meshing to transmit power.
2. Division of work between two types of reducers for milling machines
(1) Spindle variable speed reducer
The multi-stage sliding gear structure uses a shift fork to switch different gear pairs and change the transmission ratio to achieve switching between high and low spindle speeds, adapting to different cutting conditions of milling, drilling, and boring.
(2) Feed reducer
It is mostly used for tool feeding on the workbench. After deceleration, it drives the screw and converts the rotational power of the motor into linear feed of the workbench. The deceleration ensures smooth feed and sufficient thrust to prevent milling from being stressed and boring.
3. Principle of auxiliary structure
The box is sealed and filled with lubricating oil, and the gear oil bath is lubricated to reduce meshing wear; the bearing supports the gear shaft to ensure coaxial accuracy and reduce operating vibration and abnormal noise.
