23-09-2014, 04:38 PM
Brainstorming on the project: Since it was a complex project, Our team of two engineering inters, tried our best to get every possible solution for the problem. After many brainstorming sessions, we came up with the following solutions for the same: � To make threads/grove on the drive shaft to hold and pull out the drive shaft � To make gearbox with detachable parts � To develop a hydraulic tool, which could be inserted behind the drive shaft? � To change the method of fitment of the drive shaft � To design a three-jaw-chuck tool and a detachable puller with a power screw mechanism to pull drive shaft out Due to design complexities, only one suggestion of designing a tool with three jaw chuck is was accepted for consideration by the senior engineers, the one having a three jaw chuck tool. The drawing below can explain how it works actual
PROJECT DETAILS: basically swaraj produces two types of gear boxes for the tractors in this plant. The first one produces 1000 rpm at PTO shaft as a standard value and the other one produces 540 rpm at PTO shaft. The tractors use sliding mesh type of gearbox. The gear box consists of 8+2 gears. But to produce the higher torque at lower rpm, the 540 rpm PTO type gearbox uses an additional drive shaft, which is fitted inside by the manual hammering. But once it gets fitted inside the gearbox, it is difficult to remove it by any proper method. In case of a faulty gearbox, it is very complex to remove the drive shaft. And since it is mounted on the input shaft of the gearbox, the whole gearbox cannot be disassembled without taking it out of the gearbox.
Since the start of the production of 540 rpm gearbox, the issue of removing the drive shaft is a headache in order to disassemble the gearbox. Still they remove it by manual hammering, which results in a breakdown of the whole drive shaft and sometimes even the whole gearbox gets damaged