![]() ![]() In larger projects, the DCL and LSP files can be compiled into a single executable VLX file, but slide files cannot be included in the set of files compiled. I generally like to draw the images rather than use a slide file or slide library because that involves another file, and I like to only use the LSP and the DCL files. ![]() The DRAW-GEAR-IMAGE function draws the picture in the dialog box. The program starts with my usual error handler and system variable management functions SETV and RSETV, which are used throughout the program as well as at the beginning section. Most of the above information comes from the book The Fundamentals of Machine Component Design by Robert Juvinall and Kurt Marshek, John Wiley and Sons, published in 2000. In figure 3, b is L/3, and in figure 4, it is 10/P. Its value is the smaller of 10/P or L/3, and that is why the tooth face widths differ between figures 3 and 4. The face width (b in figure 1) depends on either the diametral pitch P or on the pitch cone length L (defined in figure 1). The dedendum (also shown in figure 1) is defined as 1.25/P, as it is for spur gears. ![]() The gear ratio can be given in terms of either the numbers of teeth or the pitch diameters. The gear addendum (shown in figure 1) varies from 1/P for a gear ration of 1, to 0.54/P for gear ratios of 6.8 or more. The working depth of the teeth (the addendum of the gear plus the addendum of the pinion) is 2/P as it is for spur gears. The gear pitch diameter is shown as dg in the first figure. The diametral pitch P of bevel gears is defined as the number of teeth per inch of pitch diameter. I simply used ratios of the pitch diameters, so there may be some odd sizes of shafts and lengths of the bushings for the shafts.īevel gear geometry. I found it difficult to decide on particular sizes because the pitch diameters of the gear and pinion can vary considerably as shown in the figures. There is no user control over the sizes of the shafts of either the gear or the pinion, and I leave it to you to stretch the geometry to suit any standard sizes that may be appropriate to your designs. The beveled gear with 120 teeth on the gear and 30 teeth on the pinion. ![]()
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