Gear Geometry & Applied Theory: Intro Maths Needed?

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    Gearing Theory
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Discussion Overview

The discussion revolves around the mathematical foundations necessary for understanding gear geometry as presented in the book "Gear Geometry and Applied Theory" by Litvin. Participants explore various branches of mathematics relevant to gear theory and suggest introductory resources for those new to the topic.

Discussion Character

  • Exploratory
  • Technical explanation
  • Homework-related

Main Points Raised

  • One participant suggests that the mathematics involved is more aligned with analytic geometry rather than differential geometry or topology.
  • Another participant mentions that a basic understanding of design principles is sufficient to grasp the theory of gearing without deep mathematical knowledge.
  • Some participants propose that if one is interested in designing gear profiles or analyzing forces, a deeper understanding of mathematics, including involutometry, may be beneficial.
  • Several participants recommend specific books, including "Shigley's Mechanical Engineering Design," "Dudley's Gear Handbook," and "Mechanics of Machines," as useful resources for understanding gears.
  • One participant notes that a good understanding of analytical geometry is required for Dudley's Gear Handbook.
  • A later reply mentions that knowledge of differential geometry and kinematics is necessary for advanced calculations, such as those involving hypoid gears.

Areas of Agreement / Disagreement

Participants express varying opinions on the level of mathematical knowledge required for understanding gear theory. While some suggest that only basic knowledge is needed, others argue that more advanced mathematics may be necessary depending on the depth of study desired. No consensus is reached on the specific mathematical requirements.

Contextual Notes

Participants highlight the difficulty of the diagrams and schematics in the book, indicating that understanding may depend on prior knowledge and the specific aspects of gear theory one intends to explore.

bugatti79
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Folks,

I have a book Gear Geometry and Applied Theory by Litvin. It looks pretty hairy and the diagrams/schematics of the kinematic relations etc are difficult to understand.
What branch of mathematics does this fall under, diferential geometry and topology?

I think I may need to get some introductory book before I delve into this gear theory...

Any suggestions?

Thanks
 
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I would say more towards analytic geometry. Unless you are actually trying to understand how to design the different gear profiles, I wouldn't lose much sleep over this book. The essential bit is knowing how the gear ratio affects shaft speed and torque.
 
you don't have to go in deep maths..u can understand theory of gearing if u have little bit knowledge of design..u should read theory of machines by khurmi and gupta
 
If you're interested in doing more than just working with gears, like designing different involute profiles or analyzing forces on the teeth (which isn't the case for 99% of people), then I'm sure that's a good resource. Otherwise, SteamKing's suggestion is the best course of action.
 
Shigley's Mechanical Engineering Design - Chapters 13, 14, 15 (in the 8th Edition) are for gears - has everything you need to know.
 
For involute gears, the branch of mathematics is called involutometry. As noted, most of this you don't need to derive if you are willing to accept the results without proof.
 
The OP asked for some introductory material on gearing. I would suggest

Mechanical Engineering Design - Shigley & Mischke
Mechanics of Machines - Doughty
Mechanisms and Dynamics of Machinery - Mabie & Ockvirk
 
Darle Dudely - Gear Handbook is very good. A good understanding of analytical geometry is required.
 
  • #10
I would second the Dudley book, Gear Handbook, if you can find a copy. This book is very hard to locate.
 
  • #12
You do have a very good book about gears in deep. You can calculate second order geometry of hypoid gears, for instance. I think you only need to know differential geometry and kinematics.
 
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  • #13
I have gone through the whole book several times.There is a gear design software called kissoft. I have customers sources too throughout the world. . .Please suggest me something.
 
  • #14
What do you want/mean when you say, "Please suggest me something"?
 
  • #15
Baluncore said:
bugatti79 said:
Folks,

I have a book Gear Geometry and Applied Theory by Litvin. It looks pretty hairy and the diagrams/schematics of the kinematic relations etc are difficult to understand.
What branch of mathematics does this fall under, diferential geometry and topology?

I think I may need to get some introductory book before I delve into this gear theory...

Any suggestions?

Thanks

Are you still studying gear design.
 

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