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A vehicle frame, also known as its ''chassis'', is the main supporting structure of a motor vehicle to which all other components are attached, comparable to the skeleton of an organism. Until the 1930s, virtually every (motor) vehicle had a structural frame, separate from the car's body. This construction design is known as ''body-on-frame''. Since then, nearly all passenger cars have received unibody construction, meaning their chassis and bodywork have been integrated into one another. The last UK mass-produced car with a separate chassis was the Triumph Herald, which was discontinued in 1971. However, nearly all trucks, buses and pickups continue to use a separate frame as their chassis. ==Functions== The main functions of a frame in motor vehicles are: # To support the vehicle's mechanical components and body # To deal with static and dynamic loads, without undue deflection or distortion. :These include: :: *Weight of the body, passengers, and cargo loads. :: *Vertical and torsional twisting transmitted by going over uneven surfaces. :: *Transverse lateral forces caused by road conditions, side wind, and steering the vehicle. :: *Torque from the engine and transmission. :: *Longitudinal tensile forces from starting and acceleration, as well as compression from braking. :: *Sudden impacts from collisions. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Vehicle frame」の詳細全文を読む スポンサード リンク
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