International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 09 Issue: 05 | May 2022
p-ISSN: 2395-0072
www.irjet.net
DESIGN DEVELOPMENT OF MECHANICAL VARIABLE TRANSMISSION SYSTEM WITH HIGH STARTING TORQUE FOR ELECTRICAL VEHICLES Mayank Mukesh Soni1, Hardik Bhatt2 1 PG Scholar, Dept. of Mechanical Engineering, Sal College of Engineering, Gujarat, India. Assistant Professor, Dept. of Mechanical Engineering, Sal College of Engineering, Gujarat, India ---------------------------------------------------------------------***--------------------------------------------------------------------2
Abstract - Mechanical variable drive system is specific
Even the wheel is no more attached to the vehicle, as in the case of two-wheeler bikes having an independent swing arm, wheel hub, driven chain sprocket arrangement.
transmission gear system to get high torque and relatively high speed. This system is generally applicable in Electric vehicle for high acceleration and to achieve high speed. In this project we are going to design and develop a variable gear transmission system to replace the fixed gear drive which is conventionally used in electric vehicle. Mechanical transmission system will help in reducing sudden load on Electric motor. This conversion is feasible and can be implemented by replacing the IC engine with a pre-assembled electric motor kit, as maximum parts are consciously chosen from the survey of market arability in INDIA
1.2 SCOPE OF THESIS WORK This hub Design of mid-drive can be used to support the wheel, give the wheel an attachment with a driven pulley, a drum brake system, scooter main stand can be fastened to the swingarm and this assembly together replace the IC engine completely getting all the necessary function back to work.
1.3 Objective of the project
BLDC Motor, Hub motor, Belt drive, mid-drive, Swing arm, IC Engine. Key Words:
1. INTRODUCTION
This hub is a solid attachment in between the wheel and the driveshaft. Hub holds the wheel and driveshaft together to make a connection between them and assure movement without lag, it also assures the axial alignment in rotary motion. This design also has an attachment for the driven pulley, which is further connected to a driving pulley. And also provides a drum for drum brake attachment. This hub is placed between the brake shoe case and another hub which is fastened with the driven pulley. Design universal for any type of scooter which has wheel size 90/100-10 E.g., Honda, Suzuki, Hero, TVS, etc. The whole effort is to replace the use of hub motor in electric drive to provide more power out of small BLDC motors
2. MATERIAL SELECTION Here aluminum alloy is preferred conceding the fact that Aluminum alloy’s main feature for its popularity is its low weight, this reduces the weight of the hub as well as in the vehicle. Aluminum alloy has a good machinability property compared with grey cast iron. Two aluminum alloys that are mainly used in manufacturing, are 319 and A356.
1.1 PROBLEM DEFINATION While converting an existing scooter into a pure electricpowered vehicle the main issue is that scooter engines are a design mixture of the swingarm, suspension mound, center stands mounding and driving wheel attachment, the brake drum, and brake shoe hub are also an integral part of IC engine casing. All these attachments and supports are gone as we remove the IC Engine.
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Impact Factor value: 7.529
Any old scooter (wheel size 90/100-10) can be converted to pure electric. Any type of mid-drive motor can be connected as the motor mound is universal. No power lag issue compared to hub motor in same wattage range. Rpm and power can be manipulated by just varying pulley size. Easy manufacturing and component availability in the INDIAN market. Low unsprung mass as compared to the hub motor. Direct shocks on the motor are reduced.
319 aluminum alloy Contains: 85.8 - 91.5 % of aluminum, 5.5 - 6.5 % of silicon, 3 - 4 % of copper, 0.35% of nickel,
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