CONSTANT MESH GEARBOX
In these case all the gears are in mesh and engagement between the gears which are freely rotating on the transmission main shaft and transmission main shaft is effected by moving the dog clutches as explained below.
The gearbox shaft is integral with a pinion.The pinion meshes with a wheel on the layshaft.The layshaft is therefore driven by the engine shaft.There more wheels are fixed to the lay shaft as in the sliding mesh gearbox.These gears rotate with the layshaft.The transmission main shaft is just above the layshaft and in the line with the engine shaft.The three gears in the main shaft are perfectly free on the mainshaft.These gears are in constant mesh with the wheel on the layshaft through an idler wheel which is mounted and freely rotating on a pin fixed to the gearbox casing.The three main shaft gears are therefore constantly driven by the engine shaft,but at different speeds.
Watch working of constant mesh gearbox
In these case all the gears are in mesh and engagement between the gears which are freely rotating on the transmission main shaft and transmission main shaft is effected by moving the dog clutches as explained below.
The gearbox shaft is integral with a pinion.The pinion meshes with a wheel on the layshaft.The layshaft is therefore driven by the engine shaft.There more wheels are fixed to the lay shaft as in the sliding mesh gearbox.These gears rotate with the layshaft.The transmission main shaft is just above the layshaft and in the line with the engine shaft.The three gears in the main shaft are perfectly free on the mainshaft.These gears are in constant mesh with the wheel on the layshaft through an idler wheel which is mounted and freely rotating on a pin fixed to the gearbox casing.The three main shaft gears are therefore constantly driven by the engine shaft,but at different speeds.Watch working of constant mesh gearbox
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