Chassis
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Chassis
Motor vehicle chassis with its suspension, exhaust system, and steering box

A chassis (,[1];[2] plural chassis ) is the internal framework of an artificial object, which supports the object in its construction and use. An example of a chassis is a vehicle frame, the underpart of a motor vehicle, on which the body is mounted; if the running gear such as wheels and transmission, and sometimes even the driver's seat, are included, then the assembly is described as a rolling chassis.

Examples of use

Vehicles

1950s Jeep FC cowl and chassis for others to convert into finished vehicles
PowerMac G4 chassis opened to expose computer components

In the case of vehicles, the term rolling chassis means the frame plus the "running gear" like engine, transmission, drive shaft, differential, and suspension.

An under body (sometimes referred to as "coachwork"), which is usually not necessary for integrity of the structure, is built on the chassis to complete the vehicle.

For commercial vehicles, a rolling chassis consists of an assembly of all the essential parts of a truck (without the body) to be ready for operation on the road.[3] The design of a pleasure car chassis will be different than one for commercial vehicles because of the heavier loads and constant work use.[4] Commercial vehicle manufacturers sell "chassis only", "cowl and chassis", as well as "chassis cab" versions that can be outfitted with specialized bodies. These include motor homes, fire engines, ambulances, box trucks, etc.

In particular applications, such as school buses, a government agency like National Highway Traffic Safety Administration (NHTSA) in the U.S. defines the design standards of chassis and body conversions.[5]

An armoured fighting vehicle's hull[6] serves as the chassis and comprises the bottom part of the AFV that includes the tracks, engine, driver's seat, and crew compartment. This describes the lower hull, although common usage might include the upper hull to mean the AFV without the turret. The hull serves as a basis for platforms on tanks, armoured personnel carriers, combat engineering vehicles, etc.

Electronics

In an electronic device, the chassis consists of a frame or other internal supporting structure on which the circuit boards and other electronics are mounted.[7]

In some designs, such as older sets, the chassis is mounted inside a heavy, rigid cabinet, while in other designs such as modern computer cases, lightweight covers or panels are attached to the chassis.

The combination of chassis and outer covering is sometimes called an enclosure.

Firearms

In firearms, the chassis is a bedding frame on long guns such as rifles to replace the traditionally wooden stock, for the purpose of better accurizing the gun. The chassis is usually made from metallic material such as aluminium alloy due to the more superior stiffness and compressive strength of metals compared with wood or synthetic polymer, which are commonly used in conventional rifle stocks. The chassis essentially functions as a more extensive pillar bedding, providing a metal-on-metal bearing surface for the that has reduced potential shifting under the stress of recoil. A barreled action bedded into a metal chassis would theoretically operate more consistently during repeated firing, resulting in better precision.

See also

References

  1. ^ Company, Houghton Mifflin Harcourt Publishing. "The American Heritage Dictionary entry: chassis". www.ahdictionary.com. Retrieved . 
  2. ^ "Chassis definition and meaning | Collins English Dictionary". www.collinsdictionary.com. Retrieved . 
  3. ^ Association of Licensed Automobile Manufacturers (U.S.) (1922). Official Handbook of Automobiles. National Automobile Association. p. 180. OCLC 6360726. Retrieved 2010. 
  4. ^ Sturmey, Henry (2 April 1908). "The Use of Unsuitable Vehicles". Commercial Motor. 7 (160): 146-147. Retrieved 2010. 
  5. ^ Grenzeback, Lance R.; Lin, Sandi; Meunier, Jacob (2005). Operational Differences and Similarities among the Motorcoach, School Bus, and Trucking Industries. Transportation Research Board. p. 13. ISBN 978-0-309-08821-3. Retrieved 2010. 
  6. ^ Starry p. 45, 79, 129, 143, 153, etc.
  7. ^ Khandpur, Raghbir Singh (2006). Troubleshooting Electronic Equipment. McGraw-Hill Professional. p. 45. ISBN 978-0-07-147731-4. Retrieved 2010. 

  This article uses material from the Wikipedia page available here. It is released under the Creative Commons Attribution-Share-Alike License 3.0.

Chassis
 



 

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