Why won't the car roll around?
I wondered how the rolling wheels connected to the carbody that is parallel to the ground.
I could have guessed that cogs and bearings would be in between.
But can they withstand that enormous weight? I was curious about the detailed structure. So I decided to find out.
Drive shaft, Differential, Suspension, Wagon wheel .. In the process of learning, I learned various interesting concepts. But I haven't found anything I'm really curious about. However, while watching a video explaining how the engine works, the concept of how to change the rotation into a linear force emerged. I thought this is it. Then I got to know the bearing and found the real answer. Bearings are mechanical elements that reduce friction between moving objects. In short, several small balls play a role in transmitting one turn to the other.
*Tribology : the science of wear, friction and lubrication, and encompasses how interacting surfaces and other tribo-elements behave in relative motion in natural and artificial systems.This inclues bearing design and lubrication)
Bearing is chrome alloy steel. Then how medieval people deal with this axle-friction problem? To know this, let's take a look at the history of tribology.
500,000 to 50,000 B.C.
during the Prehistoric Epoch (before 3500 BC), the concept of using friction to start a fire by rubbing two pieces of wood together was used. This is one of the most primitive ways of producing heat/fire was via friction. Fire can be created through friction by rapidly grinding pieces of solid burnable material (such as wood) against each other or a hard surface. Hand Drill, Two-Man Friction Drill, Fire Plough, Pump Fire Drill, Bow Drill, Fire piston, Flint and Steel are some of the friction fire methods. In this way, primitive men were the first to understand the concept of friction and utilize it to produce fire needed for their daily activities.
8000 B.C.
Invention of Wheel: The invention of wheels helped vehicles to move along by transferring and reducing friction. The wheel was probably invented around 8,000 B.C. in Asia. The oldest known wheel found in an archaeological excavation is from Mesopotamia, and dates to around 3500 BC. This period was known as the Bronze Age.
2400 B.C.
The period of early civilization (post 3500 BC), saw many advances in the field of tribology including stone sockets, lubricants to reduce friction, and different surface materials to reduce wear. Possible lubricants used were water, mud, and rendered fat from sheep or cows. The picture of transportation of an Egyptian statue to the grave of Tehuti-Hetep, El-Bersheh indicates the concept of lubrication was already used by ancient Egyptians. The picture depicts slaves are dragging a large statue along sand or ground. One man, standing on the sledge supporting the statue, pours a liquid (oil/water) as a lubricant in order to reduce friction between sledge and ground/sand.
As you can see, not only the fact that the perception of friction has long been, but also the attempts to reduce friction, in terms of energy efficiency, have been around for quite some time.
I could have guessed that cogs and bearings would be in between.
But can they withstand that enormous weight? I was curious about the detailed structure. So I decided to find out.
Drive shaft, Differential, Suspension, Wagon wheel .. In the process of learning, I learned various interesting concepts. But I haven't found anything I'm really curious about. However, while watching a video explaining how the engine works, the concept of how to change the rotation into a linear force emerged. I thought this is it. Then I got to know the bearing and found the real answer. Bearings are mechanical elements that reduce friction between moving objects. In short, several small balls play a role in transmitting one turn to the other.
*Tribology : the science of wear, friction and lubrication, and encompasses how interacting surfaces and other tribo-elements behave in relative motion in natural and artificial systems.This inclues bearing design and lubrication)
Bearing is chrome alloy steel. Then how medieval people deal with this axle-friction problem? To know this, let's take a look at the history of tribology.
500,000 to 50,000 B.C.
during the Prehistoric Epoch (before 3500 BC), the concept of using friction to start a fire by rubbing two pieces of wood together was used. This is one of the most primitive ways of producing heat/fire was via friction. Fire can be created through friction by rapidly grinding pieces of solid burnable material (such as wood) against each other or a hard surface. Hand Drill, Two-Man Friction Drill, Fire Plough, Pump Fire Drill, Bow Drill, Fire piston, Flint and Steel are some of the friction fire methods. In this way, primitive men were the first to understand the concept of friction and utilize it to produce fire needed for their daily activities.
8000 B.C.
Invention of Wheel: The invention of wheels helped vehicles to move along by transferring and reducing friction. The wheel was probably invented around 8,000 B.C. in Asia. The oldest known wheel found in an archaeological excavation is from Mesopotamia, and dates to around 3500 BC. This period was known as the Bronze Age.
2400 B.C.
The period of early civilization (post 3500 BC), saw many advances in the field of tribology including stone sockets, lubricants to reduce friction, and different surface materials to reduce wear. Possible lubricants used were water, mud, and rendered fat from sheep or cows. The picture of transportation of an Egyptian statue to the grave of Tehuti-Hetep, El-Bersheh indicates the concept of lubrication was already used by ancient Egyptians. The picture depicts slaves are dragging a large statue along sand or ground. One man, standing on the sledge supporting the statue, pours a liquid (oil/water) as a lubricant in order to reduce friction between sledge and ground/sand.
As you can see, not only the fact that the perception of friction has long been, but also the attempts to reduce friction, in terms of energy efficiency, have been around for quite some time.
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