final drive Flashcards
what does the final drive system provide
the last remaining gear reduction in the overall powertrain
each final drive component must be strong enough to withstand
forces and stresses often generated by overworking and overloading abuse encountered in off road terrain
planetary final drives can be either
in board mounted or outboard mounted
planetary final drives can be configured to have
a single reduction double reduction or a triple reduction
the higher the load rating of a planetary
the more number of planetary pinion gears
advantages of outboard mounted planetary
can increase the torque right at the wheels - allows for smaller powertrain components upstream - easy to maintain and service
chain final drive systems
uses a chain around a sprocket to drive two wheels on the same side of the machine
what machine would use a chain final drive system
motor grader or skid steer
chain drive final drives will act similar to what when they are traveling over rough terrain
walking beams
when used as a final drive system the components of a planetary gear set must be arranged so the system will operate
as a reduction gear set
what is the most common gear reduction configuration in single planetary final drives
in on the sun gear out on the carrier for the first speed reduction ( deepest reduction )
large haul trucks will often have
a double reduction planetary system
what are some advantages of a chain final drive
single input but multiple outputs - efficiently transmit torque without slippage across greater distances - provide a gear reduction to facilitate torque multiplications - more cost efficient
who invented the electric drive wheel
Robert Gilmour Letourneau
AC final drive systems typically have
higher efficiency then DC
