A wheel is a disc-shaped object with ideally circular contour, which is mounted rotatably about its axis of symmetry and is most commonly used as a wagon wheel. This invention and use of carts or wagons was an important for the development of technical culture in prehistoric event. Is an essential advantage unrolling its circumference on the ground. Sliding takes place only in lubricated bearings (Karaoke on 4 Wheels).
The oldest evidence Eastern Georgia in Caucasus was 2012 in Lagodekhi, excavated to a 4,000 year old Kurgan containing two 2-axis four-wheeled cart with small rather primitive pulley wheel. This vehicle was drawn not from domesticated horses, but probably of cattle, such as the excavator of Georgian National Museum suspected.
Not until the invention of steam engine and the internal combustion engine, which led to higher transport services and speeds, the wheel were completely in iron and later steel plate welded together designed as rim. The lubricated hub sleeves were replaced by roller bearings. Wheel for low loads were provided in lightweight construction with wire spokes that are biased and loaded on train.
For a long time the Sumerian culture of origin. Today, the dating of finds or representations of cars and bikes from Central Europe and Eastern Europe as well as from Mesopotamia to middle of 4th millennium lie v. Chr. Close together. A more detailed temporal and spatial arrangement of invention is not yet possible. In pre-Columbian America and in Australia the wheel was unknown for transport.
The edge of tread was chamfered or rounded. Some faces were so well preserved that smoothing strokes of a tool can be seen. The wheel created from alder wood belonged to a car whose front could not swing. When changing the direction the draft animals dragged the front of car to side until the drawbar pointed in desired direction.
Today, hard rubber tires are used on steel wheel as training wheel for. As for tracked vehicles, for carousels for cable cars and chairlifts or industrial vehicles such as forklifts. Plastic wheel with or without metal hub or bearings, often without tires are available for mobile tables, ladders (also above), Furniture, Pallet Trucks for euro-pallets and shopping carts (even with ridges for clawing on moving walkways).
Proved rolling transport from the Bronze Age Egypt. The disadvantage was that the wheel all the way designed or repeatedly taken back and had to be placed in front of object to be transported over again. But you could move relatively heavy loads, as they are spread over a larger area than it is in bearings of wheel later.
Metal spokes were until the 19th century again a leader, be it due to higher loads and speeds, such as rail transport, it was after the invention of spokes fall made it possible to build very light sturdy wheel with thin taut wire spokes as they especially when today bicycle are common.
The oldest evidence Eastern Georgia in Caucasus was 2012 in Lagodekhi, excavated to a 4,000 year old Kurgan containing two 2-axis four-wheeled cart with small rather primitive pulley wheel. This vehicle was drawn not from domesticated horses, but probably of cattle, such as the excavator of Georgian National Museum suspected.
Not until the invention of steam engine and the internal combustion engine, which led to higher transport services and speeds, the wheel were completely in iron and later steel plate welded together designed as rim. The lubricated hub sleeves were replaced by roller bearings. Wheel for low loads were provided in lightweight construction with wire spokes that are biased and loaded on train.
For a long time the Sumerian culture of origin. Today, the dating of finds or representations of cars and bikes from Central Europe and Eastern Europe as well as from Mesopotamia to middle of 4th millennium lie v. Chr. Close together. A more detailed temporal and spatial arrangement of invention is not yet possible. In pre-Columbian America and in Australia the wheel was unknown for transport.
The edge of tread was chamfered or rounded. Some faces were so well preserved that smoothing strokes of a tool can be seen. The wheel created from alder wood belonged to a car whose front could not swing. When changing the direction the draft animals dragged the front of car to side until the drawbar pointed in desired direction.
Today, hard rubber tires are used on steel wheel as training wheel for. As for tracked vehicles, for carousels for cable cars and chairlifts or industrial vehicles such as forklifts. Plastic wheel with or without metal hub or bearings, often without tires are available for mobile tables, ladders (also above), Furniture, Pallet Trucks for euro-pallets and shopping carts (even with ridges for clawing on moving walkways).
Proved rolling transport from the Bronze Age Egypt. The disadvantage was that the wheel all the way designed or repeatedly taken back and had to be placed in front of object to be transported over again. But you could move relatively heavy loads, as they are spread over a larger area than it is in bearings of wheel later.
Metal spokes were until the 19th century again a leader, be it due to higher loads and speeds, such as rail transport, it was after the invention of spokes fall made it possible to build very light sturdy wheel with thin taut wire spokes as they especially when today bicycle are common.
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