The first evidence of carts, wheel, cars or their models, there is from the second half of 4th millennium BC. BC. Between northern Germany and Mesopotamia, z. B. In Northern Europe under the Funnel Beaker Culture and the Baden culture, in foothills of Alps in northwest and the Southern Caucasus (Maikop culture), in Mesopotamia and the Indus Valley Civilization (Karaoke on 4 Wheels).
The rolling resistance on a firm, dry ground and the sliding resistance in bearings are common to substantially less than the sliding resistance with the use of a loop or of a carriage for transporting a load on dry ground. The abrasion material is also less than in grinding. Fellow with wheel and draft animals were readily available and durable for transportation for loads and people in parts of world.
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.
The design of wheel was always (later paths and roads) matched to surface to be traversed, and improves the surface corresponding to increased requirements. Steel frost on wooden rim wheel for wheelbarrows, two- or four-wheeled wagons, carts or carriages on farmland, field or boardwalks or cobbled streets or the first commercially operated electric tram in FOTG on rails.
A little earlier or at the same time also provided with bearings, rapidly rotating potter's wheel was known. An indication that the machine element and plain bearings was now well controlled: lubrication and minimize play. The first transport devices with which you could carry loads on land without wearing them were carriage and rod grinding.
In book holes put the wheel made of birch wood bushings which show by their (soft) material that the car was not designed for prolonged use. Lateral forces (for example when changing direction) caused a funnel-shaped enlargement of ends. Of other material found is to open up, the wheel were removed from parked cars to maintain elasticity of axes of wood.
Most accurate wheel made of plastic are used in precision engineering for power transmission as well as on switch. The wheel and axle system is used mainly for transport; on the one hand on vehicles other than to force deflection of hoists. Axes are used for carrying loads and therefore stressed mainly by bending; Waves and transmit torques (torsion) are therefore mainly exposed to torque.
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 rolling resistance on a firm, dry ground and the sliding resistance in bearings are common to substantially less than the sliding resistance with the use of a loop or of a carriage for transporting a load on dry ground. The abrasion material is also less than in grinding. Fellow with wheel and draft animals were readily available and durable for transportation for loads and people in parts of world.
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.
The design of wheel was always (later paths and roads) matched to surface to be traversed, and improves the surface corresponding to increased requirements. Steel frost on wooden rim wheel for wheelbarrows, two- or four-wheeled wagons, carts or carriages on farmland, field or boardwalks or cobbled streets or the first commercially operated electric tram in FOTG on rails.
A little earlier or at the same time also provided with bearings, rapidly rotating potter's wheel was known. An indication that the machine element and plain bearings was now well controlled: lubrication and minimize play. The first transport devices with which you could carry loads on land without wearing them were carriage and rod grinding.
In book holes put the wheel made of birch wood bushings which show by their (soft) material that the car was not designed for prolonged use. Lateral forces (for example when changing direction) caused a funnel-shaped enlargement of ends. Of other material found is to open up, the wheel were removed from parked cars to maintain elasticity of axes of wood.
Most accurate wheel made of plastic are used in precision engineering for power transmission as well as on switch. The wheel and axle system is used mainly for transport; on the one hand on vehicles other than to force deflection of hoists. Axes are used for carrying loads and therefore stressed mainly by bending; Waves and transmit torques (torsion) are therefore mainly exposed to torque.
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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