5.2.12 Twin shaft gearboxes
Note
Gearboxes of this design are often used on vehicles with front wheel drive or front wheel drive with a connected rear axle.
This design has a drive shaft and a driven shaft. The drive shaft is connected to the crankshaft via a clutch. The gears on the drive shaft are rigidly mounted and mesh with the gears on the driven shaft, the rotation from which, in turn, is transmitted to the drive gear and differential, and from there to the wheels.
Note
Figure 5.12 shows an example of a two-shaft gearbox with an indication of the thrust path from the engine to the drive gear and wheels, depending on the gear currently engaged.
Figure 5.12 Example of two-shaft gearbox. Power flow when engaging different gears.
The advantage of this construction arrangement is its compactness (to confirm the words, Figure 5.13), as well as ease of maintenance and repair. The gearshift drive in this case is carried out by rods (outdated drive method) or cables, which can be easily adjusted.
Figure 5.13 Sectional view of manual two-shaft gearbox
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