I have a mechanical design test coming up where we need to design a gearbox/speed reducer. We were given a practice one and I was wondering if you could just draw the assembly drawing for it (it does not need to be done with a ruler, just simple sketches of the different views, we need more than 2). 

 

The information we were given was that:

• input and output are parallel but not necessarily colinear. (so parallel but not colinear)
• gear ratio is 50, parallel input and output shafts
• high output torque
• high axial forces applied to input and output shafts, two directions
• the rotation of the output shaft is subjected to very irregular resistance and can be stopped abruptly
• no particular concern about noise level, minimum cost desired

in addition to the drawing, could you please show steps (if calculations need to be made), and answer these following questions (if able)? (for the questions you can totally do point form, it doesn't need to be totally in depth, just so I understand the concepts and such)

Image transcription text

Note: make any engineering assumption that you deem necessary regarding loads, operating conditions
and any other aspect of the reducer, and state these assumptions clearly in the booklet. TYour
assumptions, if any, cannot contradict the information provided above. A table of minimum ... 

 

(question d is the drawing i just added it incase of)

 

Just note: as said this isn't the true question for the test, its just an example the prof gave.

 

Help would be great! I really like this class and this test is stressing me out because the prof hasn't really given examples and wont look over the practice we do, so thanks in advance!

 

also this is the only other piece of info we are given:

Image transcription text

Number of Gear Tent . N5 Helix angle; in deg 1D 15 29 1.5 Number of E in # of gear teeth "H"

that's all we are going to be given on the test, sorry that i cant provide more!

again, i just need help in how it would be designed, it could be a worm gear speed reducer, or what ever speed reducer, i just need to know the process or steps even to go about making the sketch if you don't want to provide a sketch