Gear reducer the transmission ratio of gear reducer is fixed, but in the practical activities of engineering projects, some mechanical equipment often have to work under many different speed ratios, so the transmission ratio between the transmission device and the working mechanical equipment should be adjusted anytime and anywhere according to the application regulations. The structure of reducer is mainly composed of transmission gear (or vortex rod), shaft, rolling bearing, shell, etc. The box body must have sufficient bending stiffness. In order to better ensure the bending stiffness and heat removal of the box body, lifting ribs are generally set on the surface of the box body.

In order to facilitate the manufacture, installation and application of bevel gear reducer, the manufacturer of helical gear reducer also sets a series of accessories on bevel gear reducer, such as inspection hole, air vent, oil level indicator, lifting hook and cover screw, etc. Distribution transmission ratio: select the least inertia moment to make the oil change depth of each driving wheel in each transmission device approximately the same, make the bearing capacity of each transmission device close to the same, and make the external profile specification and quality of bevel gear reducer to the least extent; basic principle of operation: with the help of friction transmission system, change the master-slave relationship, and change the output semi meridian of the moving parts, so that the transmission ratio will not change. Function: the transmission ratio can be changed anytime and anywhere when necessary. Form: stepwise gearbox --- stepwise gearbox can adjust speed only according to the control organization and according to the specified level of the design scheme, while continuously variable gearbox can change the transmission ratio according to the scope of the design scheme.