Gearbox Problems: Info, Theory, Ratios & Calc.

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Discussion Overview

The discussion revolves around the theory, calculation, and ratios related to gearboxes, particularly in the context of a 12V stepper motor application. Participants explore the complexities of gearboxes and seek to clarify specific aspects of gear calculations.

Discussion Character

  • Exploratory, Technical explanation, Conceptual clarification, Homework-related

Main Points Raised

  • One participant requests comprehensive information about gearboxes, including theory and calculations, indicating a lack of prior knowledge on the topic.
  • Another participant suggests that gearboxes are complex and advises asking specific questions rather than seeking broad information.
  • A participant explains that gearboxes consist of gears and that the calculation of ratios is based on the number of teeth on each gear, providing an example of how to calculate gear ratios and their effects on speed and torque.
  • There is mention of factors such as efficiency losses due to friction, heat control, lubrication, and shifting mechanisms that may affect gearbox performance.

Areas of Agreement / Disagreement

Participants generally agree on the basic principles of gear calculations and the relationship between gears in a gearbox, but there is no consensus on the depth of information required or the specific questions to be addressed.

Contextual Notes

The discussion highlights a lack of clarity regarding the distinction between gears and gearboxes, as well as the need for more specific inquiries to facilitate effective assistance.

Who May Find This Useful

Students or individuals studying mechanical engineering, electromechanical systems, or anyone interested in the practical applications of gearboxes in motors.

ecid
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Hallo all!

Anyone have any legitible info about gearbox? It's theory, it's ratio, it's calculation, everything about gearbox?
 
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Welcome to PF, ecid. I'm afraid that your post doesn't quite conform to the way we do things here. What you are essentially asking is for someone to write a very big book for you (illustrated, no less). Gearboxes are in fact an extremely complex subject. What you need to do is ask specific questions, one or two at a time, and we can deal with them as they arise. It would help if you tell us how much you know already, and what level of education you're at. :smile:
 
Gearbox

My mistake... :bugeye:

I need info about gear calculation in a gearbox, the ratio calculation, if I'm not mistaken, and just a simple n short theory of a gearbox, if it's possible.

Now I'm in my last year of my electrotechnik diplom study, I'm doing my final now, and i know null about gearbox, and unfortunately i occupied my self with it. :redface:

i've browsed it, but only found about gear, not it with the box.

oh yeah, I'm working on a 12V stepper motor with a gearbox.

so.. how is it?
 
I'm a bit confused about your problem. You say that you found 'gears', but not 'gearboxes'. That's all you need for calculation. A gearbox is just some gears... in a box. Your ratios work the same way: compare the number of teeth on each gear. The end result is the cumulative interaction. For instance, a gear with 100 teeth driving another with 50 gives a ratio of 2:1. If it's turning at 20 rpm, the driven gear will turn at 40... in the opposite direction. (The torque will essentially be cut in half as well.) Now say the second gear shares a shaft with another 100 tooth piece, which in turn drives another 50 tooth one. Since the ones on the same shaft are turning at the same speed, the final gear will be driven at 80 rpm, with approximately 1/4 of the original torque, and will be turning the same way as the first one. No matter how many gears there are in series, you just keep adding them up like that. The torque doesn't follow the exact ratio because of efficiency losses such as friction, but it's close.
The only other things to worry about in a boxed set of gears are heat control, lubrication, and shifting mechanism (if any).
 
okay... thanks a lot.. i think that's what i need...
 

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