3-Speed Gearbox Mechanism


EOI: 10.11242/viva-tech.01.09.34

Download Full Text here



Citation

Rohan More,Amar Bhave,Atharv Batale,Krutika Mhatre,"3-Speed Gearbox Mechanism", VIVA-IJRI Volume 1, Issue 9, Article 34, pp. 1-9, 2026. Published by Mechanical Engineering Department, VIVA Institute of Technology, Virar, India.

Abstract

A gearbox is an important mechanical device used to transmit power and change the speed of a machine. This project deals with the design with the design and working of a 3-speed gearbox mechanism which provides three different speed ratios according to the requirement .The gearbox consists spur gears mounted on parallel shafts along with gear shifting mechanism to select the required speed .The main objective of this project is to achieve smooth speed variation ,simple construction ,and reliable operation .Basic design Calculations are carried out to determine gear ratios, speed, and torque transmission .A working model of the 3 speed gearbox is fabricated and tested to study its performance under different operating conditions .The results show that the gearbox efficiently transmits power and provides effective speed control.

Keywords

3 Speed Gearbox, Gearbox Mechanism, Spur gears, Speed Variation, Power transmissions, Gear Shifting Mechanism, Mechanical System, Torque Transmission.

References

  1. Design of Machine Elements—V. B. Bhandari,Gear design theory, shafts, bearings and gearbox calculation.
  2. Machine Design—R. S. Khurmi and J. K. Gupta,Gear tooth design, torque transmission and gearbox construction.
  3. Mechanical Engineering Design—Shigley and Budynas,Strength analysis of gears, fatigue failure and shaft design.
  4. Theory of Machines—S. S. Rattan,Gear mechanisms and power transmission systems.
  5. Fundamentals of Machine Component Design—Robert L. Mott,Transmission system design and gear ratio analysis.
  6. International Journal of Mechanical Engineering and Technology (IJMET)—Gearbox performance studies.
  7. International Journal of Engineering Research and Technology (IJERT)—Manual transmission and gearbox design analysis.
  8. SAE International Technical Papers—Automotive transmission and speed gearbox research.
  9. AGMA (American Gear Manufacturers Association) Standards—Gear strength and safety factors.
  10. ISO Gear Design Standards—Tooth geometry and load capacity.
  11. Automotive engineering lecture notes and gearbox design manuals from university mechanical departments—Reference material for academic transmission studies.
  12. Engineering Toolbox and Mechanical Design Data Books—Practical formulas, charts and design data for gearbox and mechanical systems.