During the Sowing, Ploughing, and harvesting, it is very important to cover most areas of the fields. The small and lightweight is beneficial for easy control. That is why tractor rear wheels are big. The next reason is that small front wheels provide a better view in the forward direction.
With smaller front wheels, the driver can see the front view, and it is much easier to see everything when the tyres are not in your way. Due to the bigger rear wheels, the driver seat set at a higher position that provides good visibility and corners of the field ploughs.
It makes farming work easy and productive. That is why tractor wheels are big. As we know, large tyres come at a higher price, and the small tyres price is low. So, the replacement of small tyres is easy and cheaper. That is why tractors have big wheels. The heavy rear wheels provide a proper weight distribution while the tractor pulls any weight.
That is why the tractor rear wheel is big. The driving axle settled higher above the ground indicates the tractor can pull more weight without the front wheel rising. It works like a lever where the twice height means twice pulling force. The engine of a tractor is very heavy and powerful, located at the front of a tractor. So, the large wheels at the rear distribute the weight more evenly to counter a heavy front. Mainly tractors are used to prepare the field before sowing seeds, and they also maintain healthy plants.
A farmer needs to care for the soil as well as crops. The bigger rear tyres have a much larger surface area, the weight of the tractor is distributed across a large area, so the tyres do not compress the soil quality as much, which is why the rear wheels of the tractor are bigger.
It seems like too simple of an answer but that is all it is. More contact with the ground provides more friction and less slippage. It is not about torque. Torque is the rotational force about the axle.
There is more torque required to spin a larger wheel than a smaller wheel so it would be better to have a smaller wheel, but because of necessity of traction larger wheels are used. In order to overcome the additional torque to spin bigger and higher mass wheels appropriate gear ratios are used. Many automobiles have hp ratings in excess of very large tractors but cannot achieve the same work because they are built for speed different gear ratios and traction requirements. All of the answers give great reasons for large rear wheels.
Another reason for small front wheels in maneuverability: large front wheels can't be swiveled through as large an angle as small ones. Tractors are normally used for rough terrains and plughing fields. The terrains may be filled with mud or provide an imbalanced drive! The Big wheels are located underneath the seat of the tractor and cover a maximum area.
They wheels help the tractor in spreading the load uniformly over a larger area. The deep treads on the tyres give it an excellent grip.
Thus, the tires stop the tractor from sinking in to soil and mud.. Thats why, mud can never sink a tractor but, can quickly bog down a conventional car!! The tractors, which we see normally , are two-wheeled drives. Since the rear wheels take care of load distribution and pulling, the front wheels are spared off that duty unlike in a conventional automobile!!
Thus, their only purpose is for steering the vehicle!! Tractors are designed to run on soil of farm which is obviously not a smooth way.
Besides, tractor is used to tilling the soil that requires much power and extreme friction to its tires. This is the reason very big size wheels also known as giant wheels are mounted on tractor.
These giant wheels also let it work efficiently in wet fields without sink. It is simple physics that maximum load of a tractor is applied at back side via pulling and digging, thus rear tires are big in size. Purpose of front tire is for steering the vehicle, hence being light weight and small is beneficial for ease of control.
Tractors commonly have larger rear wheels for several reasons. One of these reasons is weight distribution. The larger the rear wheels, the further the wheel will have to sink into the ground to become stuck, which, on the common automobile, is a little over halfway between the center of the rim wheel , and the contact point to the ground.
This is the point where tires have to climb their way out increasingly more vertically, instead of pulling themselves out more horizontally. Another reason why this is common is for ground clearance. This one's pretty simple.
The further off of the ground the non functional bottom of the vehicle is, the larger objects it will be able to pass over without contact and damage. And yet another reason for this, is incredible toque put out by a tractors transmission. You may have noticed, your little four door sedan can be more powerful than a tractor, or you may be surprised about this. It is common to think that the higher horsepower you have, the more your vehicle will be able to pull. This is not always the case.
For example, my school owns a small You may be wondering how so little power, can mean such high results. Well, mostly due to the low gear ratios of the tractors transmission, this is possible. As some of you may know, the larger the diameter of a circle, or the higher the circumference, the larger amount of torque the object will have due.
This is due to a simple law of physics this is also why car differentials were invented. I'll put this into terms that are easy to understand. When you spin a circle, or any shape for that matter let's say a ruler on the end of a pencil "helicopter" style , the outside edges of that object have to spin fast than the inside of the object to keep up with the inside.
The outside edge has a farther distance than the inside to cover in the same amount of time, making it spin faster and with more power.
Transmissions use the same excact principle. The larger the gear is, the higher the torque. Events, Workshops, Latest News, Offers — receive it all by signing up to our mailing list…. Each week, we ask you to share your questions about farming, food or Sacrewell with us on Facebook. The person who writes the best question wins a free tractor ride for a child and accompanying adult, as well as having their question answered on our website. Tractors have large and powerful diesel engines and, in theory, that means they should be able to go incredibly fast, just like sports cars.
Most tractors have a two-wheel drive , with the large rear wheels driven from the engine the rear wheels are the drive-wheels and are connected to the drive shaft and the smaller front wheels are used for steering. We explore some of the benefits of a two wheel drive below. Farm tractors spend a lot of their life working in muddy, bumpy fields. Also, because a tractor is usually pulling things, the heavy weight behind it pushes the rear wheels down, increasing their grip by providing more contact and less slippage.
This is really important to cover the maximum area of the field while carrying out different jobs like ploughing, sowing and harvesting. Being light weight and small is also really beneficial for ease of control.
Small tyres cost less than larger tyres, and therefore it is much cheaper to replace small tyres that the very expensive big ones! Having the driving axle higher above the ground means the tractor can pull more weight without the front of the tractor rising up.
0コメント