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Encyclopedia > Axle

An axle is a central shaft for a rotating wheel or gear. In some cases the axle may be fixed in position with a bearing or bushing sitting inside the hole in the wheel or gear to allow the wheel or gear to rotate around the axle. In other cases the wheel or gear may be fixed to the axle, with bearings or bushings provided at the mounting points where the axle is supported. Sometimes, especially on bicycles, the latter type is referred to as a spindle. Rotation of a plane, seen as the rotation of the terrain relative to the plane (exposure time 1. ... A driving wheel on a steam locomotive. ... Spur gears found on a piece of farm equipment. ... A bearing is a component used to reduce friction in a machine. ... It has been suggested that Bush (mechanical) be merged into this article or section. ... This racing bicycle is built using lightweight, shaped aluminium tubing and carbon fiber stays and forks. ... The word spindle might (or might not) have several meanings: A spindle (shrub), a poisonous shrub or small tree of the genus Euonymus. ...

Contents


Vehicle axles

Axles are an important structural component of a wheeled vehicle. The axles maintain the position of the wheels relative to each other and to the vehicle body. Since for most vehicles the wheels are the only part touching the ground, the axles must bear the weight of the vehicle plus any cargo, and also any acceleration forces between the vehicle and the ground. In addition to the structural purpose, axles may serve one or more of the following purposes depending on the design of the vehicle: To meet Wikipedias quality standards, this article or section may require cleanup. ... Cargo is a term used to denote goods or produce being transported generally for commercial gain, usually on a ship, plane, train or truck. ...

  • Drive
    One or more axles may be an integral part of the drivetrain. A mechanical system (typically a motor) exerts a rotational force on the axle, which is transferred to the wheel(s) to accelerate the vehicle.
  • Braking
    Conversely a vehicle may be slowed by applying force to brake the rotation of the axle. Consumer vehicles' brakes are part of the wheel assembly and therefore exert friction on the wheels directly, but engine braking may still be effected via the axle.
  • Steering
    The front axle of most automobiles is a steering axle. The vehicle is maneuvered by controlling the direction of the front wheels' rotational axis relative to the body and rear wheels.

Drivetrain is the twelfth studio album by southern rock band . ... Drivetrain is the twelfth studio album by southern rock band . ... Rotating magnetic field as a sum of magnetic vectors from 3 phase coils. ... For other uses, see Brake (disambiguation). ... Engine braking is the act of using the energy-requiring compression stroke of the internal combustion engine to dissipate energy and slow down a vehicle. ... Steering is the term applied to the collection of components, linkages, etc. ... This article or section does not cite its references or sources. ... The axis of rotation of a rotating body is a line such that the distance between any point on the line and any point of the body remains constant under the rotation. ...

Structural features

A straight axle is a single rigid shaft connecting a wheel on the left side of the vehicle to a wheel on the right side. The wheels rotate in unison, and about the same axis. Such a design can keep the wheel positions steady under heavy stress, and can therefore support heavy loads. Straight axles are used on trains, for the rear axles of commercial trucks, and on heavy duty off-road vehicles. The axle can be protected and further reinforced by enclosing the length of the axle in a housing. For other uses, see Train (disambiguation). ... The driver of this DAF tractor with an auto-transport semi-trailer prepares to offload Å koda Octavia cars in Cardiff, Wales For other meanings, see Truck (disambiguation). ... The term off-road refers to a driving surface which is not conventionally paved. ...


In a split axle design, the wheel on each side is attached to a separate shaft. Modern passenger cars generally have split front and rear axles. This allows independent suspension of the left and right wheels, and therefore a smoother ride. It also permits the left and right wheels to rotate at different speeds as the automobile turns, improving traction and extending tire life. An Independent Suspension is an automobile suspension system that allows the wheels on an axle to move independent of each other. ...


A tandem axle is a group of two or more axles situated close together. Trucks designs will use such a configuration to provide a greater weight capacity than a single axle. Semi trailers usually have a tandem axle at the rear. semi-trailer truck with sleeper behind the cab. ...


Drive axles

An axle that is driven by the engine is called a drive axle.


Modern front wheel drive cars typically combine the transmission and front axle into a single unit called a transaxle. The drive axle is a split axle with a differential and universal joints between the two half axles. Each half axle connects to the wheel by use of a constant velocity (CV) joint which allows the wheel assembly to move freely vertically as well as to pivot when making turns. Front wheel drive is the most common form of engine/transmission layout used in modern passenger cars, where the engine drives the front wheels. ... In mechanics, a transmission or gearbox is the gear and/or hydraulic system that transmits mechanical power from a prime mover (which can be an engine or electric motor), to some form of useful output device. ... A transaxle, in the automotive field, is a component that combines the functionality of the transmission, the differential and the drive axle into one integrated assembly. ... Input torque is applied to the ring gear, which turns the entire carrier (all blue), providing torque to both side gears (red and yellow), which in turn may drive the left and right wheels. ... A universal joint A universal joint, U joint, Cardan joint or Hardy-Spicer joint is a joint in a rigid rod that allows the rod to bend in any direction. ... Cross-section through a typical outer CV joint (Saab 96) Constant Velocity Joints or homokinetic or CV joints allow a rotating shaft to transmit power through a variable angle, at constant rotational speed, without an appreciable increase in friction or play. ...


In rear wheel drive cars and trucks, the engine turns a driveshaft which transmits rotational force to a drive axle at the rear of the vehicle. The drive axle may be a live axle, but modern automobiles generally use a split axle with a differential. Rear wheel drive was a common form of engine/transmission layout used in automobiles throughout the 20th century. ... Solid axle and Panhard rod on a 2002 Mazda MPV A live-axle (also called solid-axle, beam, or dead-axle) suspension is an automobile suspension that uses a single-piece axle to connect the front or rear wheels, side-to-side. ...


Some simple vehicle designs, such as go-karts, may have a single drive wheel. The drive axle is a split axle with only one of the two shafts driven by the engine. A kart racer takes a turn on an indoor track Kart racing (as the word is so spelled by enthusiasts) or karting is a variant of open-wheeler motor sport with simple, small four-wheeled vehicles called karts, go-karts, or gearbox/shifter karts depending on the design. ...


Dead axles

This dump truck has an airlift pusher axle, shown in the raised position.
Enlarge
This dump truck has an airlift pusher axle, shown in the raised position.

A dead axle is not part of the drivetrain but is instead free-rotating. The rear axle of a front-wheel drive car may be considered a dead axle. Many trucks and trailers use dead axles for strictly load-bearing purposes. A dead axle located immediately in front of a drive axle is called a pusher axle. A tag axle is a dead axle situated behind a drive axle. Image File history File links Download high resolution version (1326x645, 80 KB) Summary Description: triaxle dump truck Source: photo taken 6 October 2005 by Ky MacPherson Permission: released to Wikimedia Commons on 6 October 2005 under GFDL Licensing File links The following pages link to this file: Axle Dump truck... Image File history File links Download high resolution version (1326x645, 80 KB) Summary Description: triaxle dump truck Source: photo taken 6 October 2005 by Ky MacPherson Permission: released to Wikimedia Commons on 6 October 2005 under GFDL Licensing File links The following pages link to this file: Axle Dump truck...


Some dump trucks and trailers are configured with airlift axles, which may be mechanically raised or lowered. The axle is lowered to increase the weight capacity, or to distribute the weight of the cargo over more wheels, for example to cross a weight restricted bridge. When not needed, the axle is lifted off the ground, to save wear on the tires and axle and increase traction in the remaining wheels. A dump truck or production truck is a truck used for transporting loose material (such as sand, gravel, or dirt) for construction. ... A log bridge in the French Alps near Vallorcine. ...


See also

The wheel and axle is a simple machine. ... For the Guns N Roses lead singer, see Axl Rose. ... Axel is the name of: Axel jump, a type of jump in figure skating; Axel (Netherlands) a town in the municipality of Terneuzen, the Netherlands; Axel, a character from Kingdom Hearts: Chain of Memories and Kingdom Hearts II. Axel F, the 1985 instrumental theme song of Beverly Hills Cop by...

Patents

  • U.S. Patent 772571, D. Balachowsky and P Caire, Driving Axle

  Results from FactBites:
 
Sheldon Brown's Bicycle Glossary An-Az (1439 words)
Internal gear hubs use the axle as a fulcrum for the gearing.
There is some controversy as to whether "axle" or "spindle" should be used in particular contexts.
The distinction is based on whether the axle/spindle is stationary, as that in a hub, or rotates, as that in a bottom bracket.
Axle Assembly - Partstrain.com (467 words)
A combination of an axle shaft, one or two constant velocity joints or maybe a U-joint, the axle assembly is designed to pass on rotational force coming from the transmission to the wheels of the vehicle.
Axles are significant structural components of a wheeled vehicle.
Axles also carry the acceleration forces between the ground and the vehicle.
  More results at FactBites »

 
 

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