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H-drive
An H-drive drivetrain is a system used for heavy off-road vehicles with Six-wheel drive, 6×6 or Eight-wheel drive, 8×8 drive to supply power to each wheel station. H-drives do not use axles but rather individual wheel stations, usually carried on a punt chassis. A single differential (mechanical device), differential splits the drive into separate left and right drive shafts, which each run fore and aft inside the bottom corners of the chassis. At each wheel station a bevel gear, bevel box drives the half shaft out to the wheel. Advantages * Each wheel station has independent suspension. * Greater ground clearance than conventional axles, as there is no central housing for the differential and final drive. * Lower unsprung weight as only the halfshafts are carried, not the centre differential of an axle. * Only one differential is required; however, this also requires that final drive to transmit all of the vehicle's torque. * Losing traction with one wheel still retains trac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Driveline Windup
Driveline windup is also known as "axle binding" or "driveline binding". Mechanical components in the drivetrain of vehicles may bind and wear, which may occur when tires of varying sizes are used on one vehicle. It is a particular issue in 4WD cars with tires having varied tread patterns or brands. Despite marked size, different brands often differ in actual size. Even if both front and rear are the same brand, and marked with the same size they may still differ in actual size. A pull to the right or left when driving or braking could trigger windup caused by mismatched tire tread/sizes. H-drive Heavy off-road vehicles using 6×6 or 8×8 may use a H-drive drivetrain. These are particularly prone to driveline windup. H-drives do not use axles but rather individual wheel stations, carried on a punt or backbone chassis. A single differential splits the drive into separate left and right drive shafts, which each run fore and aft inside the bottom corners of the chassis. At ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Six-wheel Drive
Six-wheel drive (6WD or 6×6) is an all-wheel drive drivetrain configuration of three axles with at least two wheels on each axle capable of being driven simultaneously by the vehicle's engine. Unlike four-wheel drive drivetrains, the configuration is largely confined to heavy-duty off-road and military vehicles, such as all-terrain vehicles, armored vehicles, and prime movers. When such a vehicle only has six wheels by definition all are driven. When it has ten – with two pairs of ganged "dual" wheels on each rear axle as on a GMC CCKW – all are also driven but the 6×6 designation remains. For most military applications where traction/mobility are considered more important than payload capability, single wheels on each axle (often referred to as super singles) are the norm. Heavy hauler and ballast tractor 6×6s have had a long history as prime movers both in the military (as tank transports and artillery tractors), and commercially in logging and heavy equi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
6×6
Six-wheel drive (6WD or 6×6) is an all-wheel drive drivetrain configuration of three axles with at least two wheels on each axle capable of being driven simultaneously by the vehicle's engine. Unlike four-wheel drive drivetrains, the configuration is largely confined to heavy-duty off-road and military vehicles, such as all-terrain vehicles, armored vehicles, and prime movers. When such a vehicle only has six wheels by definition all are driven. When it has ten – with two pairs of ganged "dual" wheels on each rear axle as on a GMC CCKW – all are also driven but the 6×6 designation remains. For most military applications where traction/mobility are considered more important than payload capability, single wheels on each axle (often referred to as super singles) are the norm. Heavy hauler and ballast tractor 6×6s have had a long history as prime movers both in the military (as tank transports and artillery tractors), and commercially in logging and heavy equip ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DAF YP-408
The DAF YP-408 is a Dutch 8×6 armoured personnel carrier, with three out of four axles driven by the typical DAF H-drive. It has a 6-litre, 6-cylinder diesel engine with a 5-speed gearbox and a 2-speed transfer case. Prototypes were developed in the late 1950s, with the production of 750 vehicles taking place in the 1960s. The YP-408 entered service in 1964 and remained in use with the Dutch army until 1987. A number of vehicles serving with the Netherlands Army in Suriname were handed to the new Surinamese army when that country became independent in 1975. The Portuguese Air Force received 28 ex-Dutch examples in 1992. These were used by its ''Polícia Aérea'' (military police), in the air base security role, until the early 2000s. Variants * YP-408 PWI-S /Pantserwiel Infanterie Standaard: Basic version with a two-man crew (driver and gunner), able to carry up to ten passengers and armed with a Browning HB 12.7mm HMG. Of the 429 vehicles produced, around 84 were later con ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DAF Trucks
DAF Trucks is a Dutch truck manufacturing company and a division of Paccar. Its headquarters and main plant are in Eindhoven. Cabs and axle assemblies are produced at its Westerlo plant in Belgium. Some of the truck models sold with the DAF brand are designed and built by Leyland Trucks at its Leyland plant in England. History In 1928, Hubert "Hub" van Doorne founded the company as ''Commanditaire Vennootschap Hub van Doorne's Machinefabriek''. His co-founder and investor was A. H. Huenges, managing director of a brewery. Van Doorne had repaired Huenges' car several times, and Huenges, pleased with his work, offered to finance him in business. Hub started to work in a small workshop on the grounds of the brewery. In 1932, the company, by then run by Hub and his brother, Wim van Doorne, changed its name to ''Van Doorne's Aanhangwagen Fabriek'' (Van Doorne's Trailer Factory), abbreviated to ''DAF''. Huenges left the company in 1936 and the DAF company was then complet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Drivetrain
A drivetrain (also frequently spelled as drive train or sometimes drive-train) is the group of components that deliver mechanical power from the prime mover to the driven components. In automotive engineering, the drivetrain is the components of a motor vehicle that deliver power to the drive wheels. This excludes the engine or motor that generates the power. In marine applications, the drive shaft will drive a propeller, thruster, or waterjet rather than a drive axle, while the actual engine might be similar to an automotive engine. Other machinery, equipment and vehicles may also use a drivetrain to deliver power from the engine(s) to the driven components. In contrast, the powertrain is considered to include both the engine and/or motor(s) as well as the drivetrain. Function The function of the drivetrain is to couple the engine that produces the power to the driving wheels that use this mechanical power to rotate the axle. This connection involves physically linking the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Final Drive
A drivetrain (also frequently spelled as drive train or sometimes drive-train) is the group of components that deliver mechanical power from the prime mover to the driven components. In automotive engineering, the drivetrain is the components of a motor vehicle that deliver power to the drive wheels. This excludes the engine or motor that generates the power. In marine applications, the drive shaft will drive a propeller, thruster, or waterjet rather than a drive axle, while the actual engine might be similar to an automotive engine. Other machinery, equipment and vehicles may also use a drivetrain to deliver power from the engine(s) to the driven components. In contrast, the powertrain is considered to include both the automotive engine, engine and/or motor(s) as well as the drivetrain. Function The function of the drivetrain is to couple the engine that produces the power to the driving wheels that use this mechanical power to rotate the axle. This connection involves phys ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Punt Chassis
A platform chassis is a form of vehicle frame / automobile chassis, constructed as a flat plate or platform, sometimes integrating a backbone or frame-structure with a vehicle's floor-pan. Design A platform chassis is a separate chassis for a car or small vehicle. It is distinguished from other forms of chassis by being arranged as largely a single flat steel sheet, usually with additional box section stiffeners. Platform chassis developed after the ladder chassis or cruciform chassis designs in the 1930s, once car bodies began to be pressed from large steel sheets, rather than the chassis assembled from rolled channel sections. As a semi-monocoque they are still a form of body-on-frame construction, rather than a monocoque or unibody where the bodyshell and chassis are integrated into one component. Although both body and platform chassis are each made from similar pressed steel panels welded together, they were often bolted as the final two units and so may still be separabl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eight-wheel Drive
Eight-wheel drive, often notated as 8WD or 8×8, is a drivetrain configuration that allows all eight wheels of an eight-wheeled vehicle to be drive wheels (that is, to receive power from the engine) simultaneously. Unlike four-wheel drive drivetrains, the configuration is largely confined to heavy-duty off-road and military vehicles, such as all-terrain vehicles, armored vehicles, and prime movers. Other types of smaller 8x8 vehicles include such things as the Argocat. Operation When such a vehicle only has eight wheels by definition all are driven. When it has twelve – with two pairs of ganged "dual" wheels on each rear axle – all are also driven but the 8×8 designation remains. Very occasionally, on the Sterling T26 for example, the two front axles can be fitted with ganged "dual" wheels. For most military applications where traction/mobility are considered more important than payload capability, single wheels on each axle (often referred to as super singles) are the no ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trado
The Trado was a truck manufactured by DAF in the Netherlands. It was named after the co-founder of DAF Hubertus van Doorne and captain engineer Piet van der Trappen (Trappen — Doorne). Design The Trado consisted of a leaf-springed bogie with two actuated road wheels that could be easily attached to, driven by and rotate on the back axis of any commercial truck, thus adding a "walking beam" to the vehicle that significantly improved its cross-country performance. Trado III The Trado III suspension system, an improved version, was a considerable commercial success and applied to many existing and new civilian and military truck types. Pantrado The armoured vehicle projects had the designation Pantrado in common, a contraction of the Dutch word ''Pantserwagen'' (armoured car), and Trado. The Trado III suspension could be fitted with a track on the lines of the Kégresse track, changing a vehicle into a half-track. Pantrado 1 The first project, the Pantrado 1, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Worm Gear
A worm drive is a gear arrangement in which a worm (which is a gear in the form of a screw) meshes with a worm wheel (which is similar in appearance to a spur gear). The two elements are also called the worm screw and worm gear. The terminology is often confused by imprecise use of the term ''worm gear'' to refer to the worm, the worm wheel, or the worm drive as a unit. The worm drive or "endless screw" was invented by either Archytas of Terentum, Apollonius of Perga, or Archimedes, the last one being the most probable author.Witold Rybczynski, '' One good turn : a natural history of the screwdriver and the screw''. London, 2000. Page 139. The worm drive later appeared in the Indian subcontinent, for use in roller cotton gins, during the Delhi Sultanate in the thirteenth or fourteenth centuries.Irfan Habib''Economic History of Medieval India, 1200–1500'', page 53 Pearson Education Explanation A gearbox designed using a worm and worm wheel is considerably smaller than on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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