- Live axle
A live axle is a type of
beam axlesuspension system that uses the driveshafts that transmit power to the wheels to connect the wheels laterally so that they move together as a unit.
A live axle consists of a central differential in a single housing that also contains the driveshafts that connect the differential to the driven wheels. The differential is connected to the engine via a swinging
propellor shaftand a universal joint. The complete assembly may typically be suspended with leaf springs, coil springs or air bags.
Some live axles use
trailing arms, semi-trailing arms, Panhard rod, or Watt's linkageto control the vertical and lateral movements of the axle. Others, particularly older vehicles, use Hotchkiss drive, in which the leaf springs provide axle location as well as suspension.
Advantages and disadvantages
As with any beam axle, the advantages of the live axle are relative simplicity, lower manufacturing costs, lighter overall vehicle weight, and the fact that the axle and suspension systems take up little interior volume. Because the axle assembly is a fairly simple and rigid arrangement, it can easily be made strong and robust, which is an advantage for vehicles with substantial power or that are intended for use in rugged environments or off-road usage. A further advantage of a live/beam axle in off-road use is that ground clearance under the axle remains constant, even if one wheel rises over a bump and the other doesn't.
, the useful ability to change toe and camber independently left to right under cornering loads is not given with a live axle.
Until the 1980s the live axle was the most common rear suspension system on
rear-wheel drivecars in the United States. It remains common on trucks, buses and other heavy vehicles, owing to its greater potential robustness and relatively low maintenance requirements, but most passenger cars have now adopted independent rear suspension instead.
Examples of some passenger-vehicle types that have employed a live axle with various suspension elements are:
Leaf springs — the early Land-Roverand Jeepmodels;
Coil springs — the Range Rover1 & 2, Rover SD1, Volvo 240;
#Air bags — the
* [http://www.roversd1.nl/sd1web/suspension.html Rover SD1 suspension]
* [http://www.solidaxlesuspension.com/ SolidAxleSuspension.com]
Wikimedia Foundation. 2010.
Look at other dictionaries:
live axle — noun the axle of a self propelled vehicle that provides the driving power • Syn: ↑driving axle • Hypernyms: ↑axle • Part Holonyms: ↑drive line, ↑drive line system * * * noun … Useful english dictionary
live axle — A driven axle upon which the wheels are firmly attached. Usually there are two half shafts with a differential in between. Each axle drives the wheel it supports. Live axles are non independent, i.e., when one wheel moves up or down, it affect… … Dictionary of automotive terms
live axle — /laɪv ˈæksəl/ (say luyv aksuhl) noun an axle to which the wheels are fixed, so that axle and wheels rotate together. Compare dead axle … Australian English dictionary
plain live axle — noun : an axle carrying both differential and road wheels … Useful english dictionary
Axle — For other uses, see Axle (disambiguation). Not to be confused with Axl (disambiguation) or Axel (disambiguation). Train wheels are affixed to a straight axle, such that both wheels rotate in unison. This is called a wheelset. An axle is a… … Wikipedia
axle — An axle is a shaft on which the wheels revolve. A full floating axle is used to drive the rear wheels. It does not hold them on nor support them. A semi floating or one quarter floating axle is used to drive the wheels, hold them on, and support… … Dictionary of automotive terms
live — I. verb (lived; living) Etymology: Middle English, from Old English libban; akin to Old High German lebēn to live Date: before 12th century intransitive verb 1. to be alive ; have the life of an animal or plant 2. to continue alive 3. to maintain … New Collegiate Dictionary
axle wind up — The phenomenon in which the torque transmitted to the wheels by the axle which causes the live axle to turn in its own centerline … Dictionary of automotive terms
Axle Whitehead — Infobox Musical artist Name = Axle Whitehead Img capt = Axle Whitehead on the Coke Live n Local 2006 tour Background = solo singer Birth name = Alias = Died = Origin = Genre = Occupation = Singer Years active = 2003–present Label = Sony BMG… … Wikipedia
live — 1. v. 1 intr. have (esp. animal) life; be or remain alive. 2 intr. (foll. by on) subsist or feed (lives on fruit). 3 intr. (foll. by on, off) depend for subsistence (lives off the family; lives on income from investments). 4 intr. (foll. by on,… … Useful english dictionary