STEEL ALLOYS OF TRANSMISSION BOX

 TRANSMISSION BOX

• History

The advanced gearbox of today has reverted to what it was back in 1928 – three-speed and non-synchromesh. At least that is the way it is for Volvo Trucks. The development span between that first gearbox and the very latest – the I-Shift – encompasses a huge amount of work and many landmark accomplishments.

1928 saw the very first Volvo truck leave the factory. It was a very popular vehicle – in fact far more popular than its passenger car ancestor the ÖV4, whose driveline components were carried over into the truck in their entirety. This first truck, known simply as the Volvo Truck Series 1, produced 28 horsepower and had a three-speed non-synchromesh gearbox.

In these non-synchromesh gearboxes, it was necessary to press the clutch twice to change gears. This heavy double-declutching and shifting of gears solely by manual force put considerable physical strain on the driver. That is why it was hailed as an important leap ahead when synchromesh gearboxes appeared on the market in the 1950s.

“They marked an immense improvement in the driver’s working conditions: from a job requiring special training for gearchanging, it became more like driving a passenger car,” says Åke Zander, technical director at Volvo Powertrain and the person responsible for drivelines and hybrids.

During the 1950s, Volvo also started experimenting with automatic transmissions. However, it would take another 40 years for automated transmission to make its breakthrough. Before that, auxiliary gears such as range-change and splitter transmissions made their entry into the truck cab.

The manual transmission is the simplest (and earliest) of transmissions, and consist of a system of interlocking gearwheels. These wheels are arranged so that by operating a lever the driver can choose one of several ratios of speed between the input shaft and the output shaft.

https://www.mistertransmission.com/transmission-history

https://www.pddnet.com/article/2011/01/short-history-gearbox

• INVENTOR/DISCOVERER

The automatic transmission was invented in 1921 by Alfred Horner Munro of Regina, Saskatchewan, Canada, and patented under Canadian patent CA 235757 in 1923. (Munro obtained UK patent GB215669 215,669 for his invention in 1924 and US patent 1,613,525 on 4 January 1927).

The earliest form of a manual transmission is thought ^[by whom?] to have been invented by Louis-René Panhard and Émile Levassor in the late 19th century. This type of transmission offered multiple gear ratios and, in most cases, reverse.

http://www.google.com.ph/search?sourceid=chrome&ie=UTF-8&q=TRANSMISSION+BOX+history#safe=active&q=manual+transmission+inventor

• COMPOSITION

Materials for Worm Gearing - The Hamilton Gear & Machine Co. conducted an extensive series of test on a variety of materials that might be used for worm gears , to ascertain which material is the most suitable.

• Aluminum Gears • Cast Iron Gears • Plastic Gears • Steel Gears • Other Metal Gears

• Brass Gears • Copper Gears • Powdered Metal Gears • Wood Gears

  As already stated, aluminum is the most common for automatics and front wheel drive manuals. Cast iron for most rear wheel drive manuals.

All transmissions will have steel, stainless steel and brass as well.

Very few "internals" will be aluminum. Gears made from soft aluminum just wouldn't last very long at all!

http://www.ashokagears.net/gears-material.html

• GOOD EFFECTS

A family of three new motorsport gear steels has been developed to meet the requirements for increased operating temperature and improved bending and rolling contact fatigue resistance relevant to gear.

And it’s easy to see why: there’s really no beating the convenience. Just put it in Drive, put your foot on the gas and off you go while the transmission picks the right gear for you no matter what the situation.

http://www.digitaltrends.com/cars/auto-manual-dct-cvt-whats-the-best-type-of-transmission-for-you-and-your-car/