HANGZHOU CHINABASE MACHINERY CO., LTD is one of leading suppliers of power transmission products in China, we offer one-stop solution for your transmission requirement: chain sprocket, belt, pulley, gear rack, gearboxes, motor, and many other power transmissions products. OEM inquiries are also welcome we are able to make special parts requirement: Coupling,chain sprocket, belt, pulley,gear rack, gearbox, motor, and many other power transmission products. OEM inquiries are also welcome we are able to make special parts.We are waitting for your visiting.More information please visit :http://www.power-transmissions.com

Real boat gearboxes look more complicated, but depend on exactly this principle. In fact, the main difference between the simple gear train and the Volvo MS2 is that the MS2 uses coneshaped bevel gears, so that although the input shaft is horizontal, the central driven shaft is vertical.

The motive for this is that it provides a simple way of achieving a choice of ahead or astern bevel gear.

The bevel gear on the input shaft turns two slightly larger bevel gears that spin freely on the vertical shaft. One is driven by the top of the input gear and the other by the bottom of it, so they rotate in opposite directions, but they are the same size as each other so they turn at the same speed.

Between the two gears is a sliding clutch assembly, shaped like two shallow cones mounted base-to-base on the shaft. Ridges called splines on the pto shaft and matching grooves in the clutch ensure that it can easily slide up and down, but can't turn without turning the shaft as well. Moving the gear lever slides the clutch up or down so that one of the cones engages into a matching hollow in one of the spinning gears, which locks that gear on to the shaft.

At the bottom of the shaft, a relatively small bevel gear engages with a much larger gear on the output shaft, to give a horizontal output, at a much lower speed of rotation.