04-11-2014, 12:46 PM
Abstracts: In this project a gear shifting mechanism is designed and applied to make the shifting process faster and less destructible for the driver and customer. The new device must be reliable, with small dimensions and with low construction and maintenances cost. This project aims to improve gear shifting process using devices as a manual two speed gear box, two pneumatic double acting cylinder, directional control, and electrical motor, a belt, two pulleys, push buttons, a table (holder) and power supply. According to suggested gear shifting method the driver can select the transmission gear ratio without moving his hands from the steering wheel by putting the gear shifting push buttons on the steering wheel. Using this method leaves to the driver the excitement of choosing the shifting moment. summry This study describes how to convert the traditional manually gear shifting mechanism to a semi-automated gear shifting mechanism. The development has concluded also the gearbox, which became much smoother and produces less noise. · This design helps the driver to increase his focusing on the road. Also reduces the time needed to engage the required reduction ratio, which increases the vehicles response. · This design may be considered as an educational model for gear shifting mechanism. So, we pointed to the Following: · The suitable dimensions for the main components holder. Keeping in mind the addition of other parts for enhancement and development. · A manual, 4-frontal speed gear box is used automobile drive is chosen for this design because it is easier to modify. · An electrical motor is used to create mechanical power instead of an internal combustion engine, which is difficult to be placed there. It is also used to make the engagement process easy. · A couple of pulley and a belt are used to transmit power from the electrical motor to the gear box. · We will use two pneumatic double acting cylinders per gear shifter. · One direction control valves are used to change the compressed air direction.