The gear housing is a

mechanical housing In engineering, a housing or enclosure is a container, a protective exterior (e.g. shell) or an enclosing structural element (e.g. chassis or exoskeleton) designed to enable easier handling, provide attachment points for internal mechanisms (e.g ...

that surrounds the mechanical components of a

gear box Propulsion transmission is the mode of transmitting and controlling propulsion power of a machine. The term ''transmission'' properly refers to the whole drivetrain, including clutch, gearbox, prop shaft (for rear-wheel drive vehicles), differe ...

. It provides mechanical support for the moving components, a mechanical protection from the outside world for those internal components, and a fluid-tight container to hold the lubricant that bathes those components.

Types of housings

A split housing is like a walnut shell, the housing is divided in two parts, and lower part that tie down the Gear Box to the structure, support all the components during the assembly stage and hold the lubrication oil; and the upper part that complete the enclosure and provide mechanical integrity to the Housing. The upper and lower parts of the housing have a mating surface that seals perfectly the housing to avoid oil leaks and fatigue of the housing. A bathtub housing is made on a single piece and have a top opening for servicing the gear box and side opening to accommodate the bearing housing associated to the gear shafts. Have in general a better leak free performance but is more difficult to assemble and repair. Triumph Gearbox with Overdrive

Methods of manufacture

Traditionally, it is made from cast iron or cast aluminium, using methods of

permanent mold casting Permanent mold casting is a metal casting process that employs reusable molds ("permanent molds"), usually made from metal. The most common process uses gravity to fill the mold, however gas pressure or a vacuum are also used. A variation on the ...

. or

shell molding Shell molding, also known as shell-mold casting, is an expendable mold casting process that uses resin covered sand to form the mold (manufacturing), mold. As compared to sand casting, this process has better dimensional accuracy, a higher productiv ...

.. Experimentally, though,

composite materials A composite material (also called a composition material or shortened to composite, which is the common name) is a material which is produced from two or more constituent materials. These constituent materials have notably dissimilar chemical or ...

have also been used.

References

Bibliography

* * {{DEFAULTSORT:Gear Housing Automotive transmission technologies

Types of housings

Methods of manufacture

See also

References

Bibliography