General Bevel Gear box question?????

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The challenge: I need to develop a mechanism involving two parallel shafts that are spaced some distance apart and rotate in the same direction, either clockwise or anticlockwise.

Given the considerable distance between the shafts (over 1 meter), using a chain of gears is impractical. Consequently, my solution is to employ a third shaft oriented at 90 degrees coupled with bevel gears; the driving motor would be connected to this third shaft. Although utilizing a pulley-belt system was suggested, I favor the 90-degree shaft approach due to the large distance between the parallel shafts.

As a novice in mechanical engineering, I delved into the subject of bevel gears and discovered various types, including straight, spiral, and others. The 3D library I'm leveraging for gear generation produces angled teeth.

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First question: For all types of bevel gears except straight bevel gears, do the teeth's geometry influence the rotation direction?

Since I aim to maintain consistent rotation speeds on the parallel shafts and have no speed constraints for the third 90-degree shaft, my plan involves creating gears of identical sizes (same number of teeth).

Second question: Should I opt for larger or smaller gears? How does the number of teeth impact the performance of bevel gears?

Additionally, I intend to 3D-print these gears for the prototype, so any observations related to this approach would be highly valuable.

Thank you in advance.

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Understanding some additional key points and common questions could enhance your comprehension and application of bevel gears:

• Spiral vs. Straight Bevel Gears: Spiral bevel gears facilitate smoother and more silent operation compared to straight bevel gears. However, due to their complex design, they are more challenging to fabricate.
• Material Selection: For 3D printing prototypes, plastic materials might suffice. However, for actual mechanical applications, metal gears are preferable due to greater durability and load-bearing capacity.
• Efficiency: While bevel gears are efficient, certain designs (e.g., hypoid bevel gears) can offer even better performance due to their offset shafts, allowing for more significant transfer of torque.

Frequently Asked Questions:

Q: What are the advantages of using bevel gears?
A: Bevel gears allow for changes in the drive direction, making them ideal for applications requiring angular gear arrangements such as in automobiles and industrial machinery.

Q: Can bevel gears be used for high-speed applications?
A: Yes, bevel gears can be used in high-speed applications; however, spiral bevel gears are generally preferred for such cases due to their ability to handle stress more effectively.

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