The principal purposes of using a subframe are, to spread high chassis loads over a wide area of relatively thin sheet metal of a monocoque body shell, and to isolate vibrations and harshness from the rest of the body. For example, in an automobile with its powertrain contained in a subframe, forces generated by the engine and transmission can be damped enough that they will not disturb passengers. As a natural development from a car with a full chassis, separate front and rear subframes are used in modern vehicles to reduce the overall weight and cost. In addition a subframe yields benefits to production in that subassemblies can be made which can be introduced to the main bodyshell when required on an automated line.
There are generally three basic forms of the subframe.
A simple "axle" type which usually carries the lower control arms and steering rack.
A perimeter frame which carries the above components but in addition supports the engine.
A perimeter frame which carries the above components but in addition supports the engine, transmission and possibly full suspension. (As used on front wheel drive cars)
A subframe is usually made of pressed steel panels that are much thicker than bodyshell panels, which are welded or spot welded together. The use of hydroformed tubes may also be used.
The revolutionary monocoquetransverse enginedfront wheel drive 1959 Austin Mini, that set the template for modern front wheel drive cars, used front and rear subframes to provide accurate road wheel control while using a stiff lightweight body. The 1961 Jaguar E-type or XKE used a tubular spaceframe type front subframe to mount the engine gearbox and long bonnet / hood, to a monocoque 'tub' passenger compartment. The subframe saw regular production in the 1960s and 1970s General Motors X platform and F platform bodies and the 1985-05 M platform vans (Astro, Safari).
Subframes are prone to misalignment, which can cause vibration and alignment issues in the suspension and steering components. Misalignment is caused by space between the chassis-subframe mounting bolts and the mounting hole. There are a number of companies in the automotive aftermarket that offer solutions for the subframe misalignment and movement issue, including TyrolSport of the US and Spoon Sports of Japan.
Rear subframe and suspension of 1963 Jaguar E-Type.
Underbody with front and rear subframes of 2011 Ford Focus.
Referencesedit
^"Subframes & Engine Cradles". Retrieved 25 June 2022.
^"What is a Subframe? (with pictures)". Wiki Motors.
^"Crossmember vs. Subframe: What's the Difference?". September 6, 2021.
January 01, 1970
subframe, this, article, uses, bare, urls, which, uninformative, vulnerable, link, please, consider, converting, them, full, citations, ensure, article, remains, verifiable, maintains, consistent, citation, style, several, templates, tools, available, assist, . This article uses bare URLs which are uninformative and vulnerable to link rot Please consider converting them to full citations to ensure the article remains verifiable and maintains a consistent citation style Several templates and tools are available to assist in formatting such as reFill documentation and Citation bot documentation August 2022 Learn how and when to remove this message A subframe is a structural component of a vehicle such as an automobile or an aircraft that uses a discrete separate structure within a larger body on frame or unit body to carry certain components such as the engine drivetrain or suspension The subframe is bolted and or welded to the vehicle When bolted it is sometimes equipped with rubber bushings or springs to dampen vibration 1 2 3 4 The Lamborghini Aventador has a carbon fibre central monocoque with front and rear steel subframes mounting the mechanics Front subframe of a Vauxhall Vectra on display in Bedford Museum The principal purposes of using a subframe are to spread high chassis loads over a wide area of relatively thin sheet metal of a monocoque body shell and to isolate vibrations and harshness from the rest of the body For example in an automobile with its powertrain contained in a subframe forces generated by the engine and transmission can be damped enough that they will not disturb passengers As a natural development from a car with a full chassis separate front and rear subframes are used in modern vehicles to reduce the overall weight and cost In addition a subframe yields benefits to production in that subassemblies can be made which can be introduced to the main bodyshell when required on an automated line There are generally three basic forms of the subframe A simple axle type which usually carries the lower control arms and steering rack A perimeter frame which carries the above components but in addition supports the engine A perimeter frame which carries the above components but in addition supports the engine transmission and possibly full suspension As used on front wheel drive cars A subframe is usually made of pressed steel panels that are much thicker than bodyshell panels which are welded or spot welded together The use of hydroformed tubes may also be used The revolutionary monocoque transverse engined front wheel drive 1959 Austin Mini that set the template for modern front wheel drive cars used front and rear subframes to provide accurate road wheel control while using a stiff lightweight body The 1961 Jaguar E type or XKE used a tubular spaceframe type front subframe to mount the engine gearbox and long bonnet hood to a monocoque tub passenger compartment The subframe saw regular production in the 1960s and 1970s General Motors X platform and F platform bodies and the 1985 05 M platform vans Astro Safari Subframes are prone to misalignment which can cause vibration and alignment issues in the suspension and steering components Misalignment is caused by space between the chassis subframe mounting bolts and the mounting hole There are a number of companies in the automotive aftermarket that offer solutions for the subframe misalignment and movement issue including TyrolSport of the US and Spoon Sports of Japan Rear subframe and suspension of 1963 Jaguar E Type Underbody with front and rear subframes of 2011 Ford Focus References edit Subframes amp Engine Cradles Retrieved 25 June 2022 https www carparts com blog what you need to know about subframe repair What is a Subframe with pictures Wiki Motors Crossmember vs Subframe What s the Difference September 6 2021 Retrieved from https en wikipedia org w index php title Subframe amp oldid 1194800092, wikipedia, wiki, book, books, library,
