Views: 0 Author: Site Editor Publish Time: 2023-08-24 Origin: Site
The formation surface of the cylindrical gear is tangent to the base column, and the occurrence line is β b from the axis.
When the angle β b=0, the tooth profile surface of the straight cylindrical gear is formed.
Geometric parameters of the cylindrical gear The end surface tooth profile of the cylindrical gear is the accurate involute, and the normal surface tooth profile is the involute, as shown in Figure 8.27.
Its end surface is not the same as the normal surface parameters.
(1) The helical angle on the base cylindrical surface and the helical angle on the dividing circle (2) The normal surface modulus mn and the end surface modulus number mt of the cylindrical gear (3) The normal surface pressure Angle and the end surface pressure Angle of the cylindrical gear (4) The high coefficient of tooth top and tooth root of inclined gear (5) The helical angle on the base cylindrical surface and the helical angle on the dividing circle (6) Correct engagement conditions for cylindrical gear transmission The relationship between the modulus, pressure angle and spiral Angle of a pair of cylindrical gears is 8.9.3 Equivalent gear for the cylindrical gear 8.9.4 Coincidence degree of the cylindrical gear drive The upper left figure shows the engagement surface of the straight gear drive, and the lower left figure is the engagement surface of the oblique gear drive. In the figure, B2B2 shows the pair of wheel teeth entering the engagement position, and B1B1 shows the position of the wheel teeth leaving the engagement position.
8.9.5 Features of the cylindrical gear drive Advantages: 1) good engagement characteristics, 2) large coincidence degree, and 3) the number of small teeth without root cutting is less than straight teeth.
Disadvantages: the axial force is generated during working.
