2. An automatic bending machine requires a very large torque and slow rpm. Suppose you are to design this project; you have to reduce the speed of a 1400 rpm motor to 18 rpm. Usually, a speed reduction this large is achieved by worm gear drives, however it is quite expensive and not available. The challenge is you are left with only spur gears. Make calculations for the number of teeth, diameter, and speed of the gears in your gearbox design. (The dimensions must be realistic).

2. An automatic bending machine requires a very large torque and slow rpm. Suppose you are to design this project; you have to reduce the speed of a 1400 rpm motor to 18 rpm. Usually, a speed reduction this large is achieved by worm gear drives, however it is quite expensive and not available. The challenge is you are left with only spur gears. Make calculations for the number of teeth, diameter, and speed of the gears in your gearbox design. (The dimensions must be realistic).

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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The figure below shows the power transmitted through a gear drive to multiple output shafts. Gear A is mounted on an electric motor with a rotational speed of 600rpm. Gear A drives a simple gear train consisting in gears B, C, D, and E and transfers the input power to each gear to the shaft on which is mounted. The power delivered from shafts B, C, D, and E are: 8hp, 12hp, 5hp, and 5hp, respectively. For simplicity, all gears have a diametral pitch of 3 and the following numbers of teeth: NA=75, NB=15, NC=120, ND=15, NE=36. The torque on shaft D is most likely: 2015 lb in 105 lb in 250 lb in 630 lb in
The figure below shows the power transmitted through a gear drive to multiple output shafts. Gear A is mounted on an electric motor with a rotational speed of 600rpm. Gear A drives a simple gear train consisting in gears B, C, D, and E and transfers the input power to each gear to the shaft on which is mounted. The power delivered from shafts B, C, D, and E are: 8hp, 12hp, 5hp, and 5hp, respectively. For simplicity, all gears have a diametral pitch of 3 and the following numbers of teeth: NA=75, NB=15, NC=120, ND=15, NE=36. The expected rotational speed on shaft E is most likely: 375 rpm 600 rpm 1250 rpm 3000 rpm
Explain, with a sketch, the working of Worm and Worm gears. In what kind of applications are worm gears preferred over traditional gear trains? What is back-driving?
If the maximum chain speed for a sprocket having 19 teeth is 750 fpm, estimate its minimum chain speed.
A planetary gear used on the Mars rover uses a 25-tooth helical gear withψ = 20° has a 25° pressure angle in the plane of rotation (figure Q2a). Whatis the pressure angle in the normal plane, ϕn, and the equivalent number ofteeth, Ne? What pressure angle and number of teeth would a straight spurgear tooth of comparable bending strength have?
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. A wheel has traveled for 100 m with 50 rpm. If we want to convert the wheel into a spurgear with 60 teeth, what do you think will be the tooth-to-tooth travel time? ?