tailieunhanh - Manual Gearbox Design Part 2

Tham khảo tài liệu 'manual gearbox design part 2', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 6 Manual Gearbox Design Kc unit conversion factor when Te is in Kc when TE is in Kc Te maximum engine output torque or mT lowest internal gear ratio mc transmission converter ratio manual transmission mc 1 where m torque converter stall ratio mG crown wheel and pinion ratio N n N number of teeth - crown wheel n number of teeth - pinion e transmission efficiency 75-100 . e to Axle torque - from wheel slip TWSG calculated in or T wsg where WD loaded weight on driving axle - front or rear lb or kg D i. d t f r passenger cars WL overall weight of vehicle max. including driver lb or kg fd weight distribution factor - drive axle . proportion of JFt on driving axle. When not available use ft dynamic weight transfer K X Gp . Dynamic weight transfer give the proportion of load transferred to driving axle due to acceleration. When not available use Kt for rear axle drive K for front axle drive Gp see page 4 fs coefficient of friction between tyres and road. Use for normal tyres on dry roads and for high-performance cars with special or oversize tyres rR rolling radius of tyre in or m Note To calculate the value of Gp performance factor see the formula on page 4. Drive pinion torque Tp calculated in or Crown wheel and pinion 7 where n number of teeth - pinion N number of teeth - crown wheel TG axial torque - drive gear Use TpFG see page 4 or TpMG see page 5 or Twsa see page 6 Stress determination and scoring resistance Checking the strength of the gears using the new higher torques should be carried out by checking the pair of gears for their resistance to tooth breakage and surface failure. Resistance to tooth breakage is normally dependent upon the bending stress occurring in the root area of the tooth and the resistance to surface failure usually depends on contact stress occurring on the tooth surfaces while the scoring resistance is measured by the .

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