Working of the Mechanical jack:

The basic idea of the working of the mechanical jack will be the movement taken from the drive shaft. There is a drive shaft connecting engine and the rear wheel drive to move the tires. The concept behind to move the tires is that the movement of the shaft is given to the rear wheel drive that is attached to the tires through driving axles, allowing tires to move. This concept or idea can be used for our mechanical jack too. We have discovered an idea to lift the car that is stuck in the deserts using the same concept of shaft and its movement. We will be placing jacks in front of the tires up to an extent through which we can expect a lift. This will be mechanically attached to the lower portion of the car.

The circle drawn with black color in bold is the set of worm gear attached to the shaft as per mentioned previously. The upper worm gear will be attached to the jack as per shown in the figure. Now when the car is stuck in the desert, driver will set the car in neutral position. He will then operate the first jacking lever which will set the worm gear. Worm gear will take the shaft movement now. Depending on how much lift is needed, driver can operate the other lever through the dashboard. The more lift needed, the more will be lever moved forward.

Now once the desired lift is obtained, the first lever will be again operated to release the worm gear movement. Then the driver can operate the car gears to Drive (in automatic cars) or first gear (in manual cars) and with enough acceleration car will move forward. In this way without wasting energy, car can overcome the situation of getting stuck

Working of driveshaft:

A drive shaft is a mechanical component for transmitting torque and rotation, usually used to connect other compoenets of a drive train that cannot be connected directly because of distnce or the need to allow for relative movement between them. Drive shafts are carriers of torque: they are subject to torison and shear stress, equivalent to the difference between the in the input torqure and the load. They must therefore be stronge enough to bear the stress, whilst avoiding tooo much additional weight as that would in turn increase their inertia. To allow for varivtions in the alignment and distane between the driving and driven compnoents, drive shafts frequently incorporate one more universal joints, jaw coupling, or rag joints, and sometimes a splined joint or primsatic joints.

The drive shaft is connected to the two ends, one to the tailshaft and the other to the rear differential. During driving, drive shaft is being turned by transmission which in return turns the gear in the rear differential. This is the way how torque is distributed to the rear differential from the transmission.

Limitations to Mechanical jack:

•      With an effective solution to move the car, proper modification is required. This does not come by default and not many engineers would have come across this idea so it is difficult to spread this knowledge.
•      For suppose the knowledge is spread across everywhere still the cost for this major modification will be very high 
•     Parts are not easily available so as to match the size of a gear and shaft is very difficult until and unless it is being ordered in a bulk
•      Time consuming modification with enough complexities
•      Due to the cost it will not be the first choice among customers
  
  
  
  
  
  
  Due to so many limitations we have skipped this jack and have moved to another jacking system which will not face these limitations.