A gearbox is a mechanism that consists of gear or worm gears and serves to transfer engine power to the working mechanism. Reducers differ in: type of transmission (gear, worm, gear-worm); type of gears (cylindrical, bevel, etc.); the number of stages (one-stage, two-stage, etc.); the relative position of the shafts in space (vertical, horizontal); features of the kinematic scheme (deployed coaxial, with a bifurcated stage, etc.)
Instructions
Step 1
Usually, in order to draw a gearbox, it is necessary to calculate and design it. For this, the simplest kinematic diagram of the gearbox, its operating conditions, the nature of the load, the required service life, etc. are given.
Step 2
The sequence of calculating the gearbox:
Select the electric motor and its kinematic calculation. Calculate gears (for example, V-belt) based on mechanical engineering formulas with simultaneous geometric calculation and drawing.
Step 3
Make the calculation of the gear train (calculate the gears, the number of teeth, center distance, gear ratio, meshing modulus). Remember that it is also produced with the simultaneous graphical construction of the drawing.
Step 4
Calculate the load of the gearbox shaft, which is a stepped cylinder, its dimensions and the number of steps depend on the number and dimensions of the parts mounted on the shaft. The gear shaft is a stepped cylindrical body, the number and dimensions of the steps of which depend on the number and dimensions of the parts installed on the shaft. The design calculation aims to determine the approximate geometric dimensions of each stage of the shaft: its diameter and length. Calculation of the dimensions of the gear shafts.
Step 5
Based on clause 4, calculate and design the gearbox shaft, then the diameter and length of each stage of the shaft with the simultaneous construction of a drawing in accordance with the ESKD. The next stage of the calculation is the choice of a coupling for connecting the output end of the gearbox shaft with the drum shaft.
Step 6
All drawings of gearbox parts are drawn up in accordance with GOST. Drawings must accurately reflect the device and design of the gearbox, their number and types depend on the complexity of the mechanism. Recently, many computer programs have been developed that calculate and design gearboxes according to given parameters. These are AutoCAD programs, Compass, etc.
