B3-KV-27-D ith reinforced bearing see page Flender GmbH F Bevel-helical gear units B3

Flender/Flender Gear Units/Bevel-helical gear units B3

s of length- wise tooth curvature mrc0 (2. The iterative calculation from Equation (2. to Equation (2. is repeated rst with 1.1 and then with interpolated values for ,until the condition lim/C1/C1/C1/C1/C1/C1/C1/C1/C2:0 is satised. End of iteration Face width factor cbe2de2 2 sin 2Rm2 b2(2.3 2 Fundamentals of Bevel Gears 2.3.3 Calculation of Gear Dimensions Additional input data Once the pitch cone parameters have been determined, number of additional input data are needed in order to calculate gear dimensions(see Table 2.. Data for bevel and hypoid gears may be given either as data type or as data type . Permissible data for the values in Table 2.8are predened at the design stage (see Sect. 3.. For this purpose, data type values can be converted into data type values and vice versa. Table 2.9summarises the relations between the two data types. Figure 2.2 presents the tooth prole of the basic rack for the wheel and the tooth prole withshift. All variables for both data types are plotted.Table 2.8 Additional input data to calculate gear dimensions Data type Data type Symbol Description Symbol Description dD Nominal design pressure angle, drive sideadD Nominal design pressureangle, drive side dC Nominal design pressure angle, coast sideadC Nominal design pressureangle, coast side flim Inuence factor of limit pressure angleaflim Inuence factor of limit pressure anglea xhm1 Prole shift coefcientbcham Mean addendum factorbof wheel khap Basic crown gear addendum factorbkd Depth factorb khfp Basic crown gear dedendumfactork Clearance factorb xsmn Thickness modication coefcientbkt Wm2Thickness factorbor Mean slot width of the wheel For data types and : jmn,jmt2, jen,jet2Backlash (one of four) a2 Addendum angle, wheel f2 Dedendum angle, wheel aThe pressure angles on the drive and coast sides of hypoid gears are generally balanced. Certain applications, however, may be performed without this compensation (see Sect. 2.2.5.3 ) bAll dimensionless fac