how to make structural formula in gearbox" ?

Gear box
To learn more about the "switch", and, to complete the picture, first check my article about gear ratios and transmission.
The classic response to the question "what is the gear?" is "to keep the oil in," which is a pretty fair if you do not want to find out more!
Some call it a certain transmissions and transmission depends on which side of the Atlantic you are. For Europeans, this gear box. In British English the term transfer refers to the entire transmission, including transmission, clutch, differential and final drive shaft. In American English, however, the distinction that the gear box is any device that converts the speed and torque, while the transmission gears that can be "pushed" to dynamically change the speed/torque ratio, for example, in the vehicle, but we can say that the gear box is the central component of the transmission system.
And now, when you read the gear article and understand how simple transmission work, let's talk about the more complicated stuff!
The two main functions of any case rigidly mounted bearings gear any gear shafts, so that the pinion to maintain precise gearing under farewell loads caused by how they transmit torque to keep the dirt and keep lubricating oil in addition, the case must find mechanisms for selector and oil pumps, and have the access panel to the collection. In accordance with the plan of almost any modern race car, in this case, is part of the primary structure of the chassis, mounting the rear suspension and suspension load on the rear side of the engine. Free space inside the gearbox can be used to place oil for engine, transmission, if it is dry sumped, hydraulics, and be sure to catch tank. Finally, in recent years, gearboxes used in leading the formula should be installed in a rear impact absorbing structure, usually integrated in the removable back cover for final drive/differential, which is also mounted on the rear wing designs.
"Simple" transmission, as described at the beginning of this article, do not use Gears in racing anymore. Only the most basic sports categories are using it. In formula 1 this type of gear is not used for more than 20 years. Sequential gear box things in our sport, to rally, DTM, formula 1, almost all open wheel lessons, WTCC, Indy, truck racing ... Sequential transmissions typically use a rotating drum to switch gears.For many years it was Convention for the F1 cars to find the gear cluster behind
differential, for easy access to change gear ratios, even though it compromised weight distribution and aerodynamics. the current trend, with jagged clusters at the front (engine) end of the transmission, means that the transmission will need to be removed to change the gear box gear (input shaft and output shaft) mounted in a removable cassette that can be removed after the gearbox/rear suspension/wing assemblies have been removed from the rear of the car. Input shaft and output shaft of each perform seven shows, and every pair of gears (one on the input shaft and one on the output shaft) are carefully selected to give the desired gear ratio.