Calculating Drive Axle Forces and Moments in Golf Buggy Design

In summary: Similarly, the bending moment at bearing B is 1961.31 * 0.5 = 980.65 Nm. In summary, to calculate the bending moments and reaction forces on the shaft, you need to determine the reaction forces at the bearings and the moment arm of the load from the wheel. These values can then be used to calculate the bending moments at each bearing.
  • #1
craigyoung1990
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Homework Statement



Hello

For a project I am designing a golf buggy and I am calculating conflicting information. The problem is as follows;

There is a drive shaft, A-B, 1.2m long.
There are bearings supporting the shaft 0.1m from the centre of the wheels (therefore 1m apart)
The wheels have a load of 1584.32N/wheel acting down.
There is a driver (bevel) gear 0.5m from the centre of the left wheel (A) with the following forces acting on the shaft - Axial = 1050.13N, Radial = 525.18N, Tangential = 3225.9.


Homework Equations



Can someone show me, by calculation, the bending moments and reaction forces on the shaft.
Ever so grateful



The Attempt at a Solution



I have been working on this all day and I calculate Reaction at bearing A = 2895.21N and 1961.31N at bearing B. However I not confident at all, hence the reason I have discovered this forum. All help would be gratefully aprreciated.
 
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  • #2
The reaction forces at the bearings are determined by the forces acting on the shaft. The bending moment at the bearings will be determined by the reaction forces and the force of the load from the wheel. To calculate the bending moments, you need to determine the moment arm of the load from the wheel relative to the bearing. The bending moment is then calculated as the product of the reaction force and the moment arm. For example, if the moment arm of the load from the wheel relative to bearing A is 0.5 m, then the bending moment at bearing A is 2895.21 * 0.5 = 1447.61 Nm.
 

1. What is a drive axle calculation?

A drive axle calculation is a process used to determine the appropriate size and ratio of a vehicle's drive axle. This calculation takes into account factors such as the vehicle's weight, engine power, and intended use to ensure optimal performance and efficiency.

2. Why is it important to calculate the drive axle?

Calculating the drive axle is important because it ensures that the vehicle's power is properly distributed to the wheels. This can affect the vehicle's acceleration, towing capacity, and fuel efficiency. A correctly calculated drive axle can also prolong the lifespan of the vehicle's drivetrain.

3. How do you calculate the drive axle ratio?

The drive axle ratio is calculated by dividing the number of teeth on the ring gear by the number of teeth on the pinion gear. This ratio determines how many times the driveshaft must rotate in order to turn the wheels once. A higher ratio means the wheels will turn more times for every rotation of the driveshaft, providing more torque but sacrificing fuel efficiency.

4. Can drive axle calculations be done manually?

Yes, drive axle calculations can be done manually using a formula and inputting the necessary data such as the vehicle's weight, engine power, and gear ratio. However, it is more common for these calculations to be done using computer software or by a specialist to ensure accuracy.

5. How can improper drive axle calculations affect a vehicle?

Improper drive axle calculations can cause various issues such as poor acceleration, decreased fuel efficiency, and premature wear and tear on the drivetrain. It can also lead to safety hazards if the drive axle is not able to handle the power and weight of the vehicle, causing potential breakdowns or accidents.

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