Starter motor construction

F - Mech Eng,Light,Heat,Weapons – 02 – N

Patent

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74/8

F02N 15/06 (2006.01)

Patent

CA 2022256

STARTER MOTOR CONSTRUCTION Abstract of the Disclosure A starter motor construction including a drive shaft and a spline having an external helical thread is disposed concentrically of the shaft and rotates therewith. An internally threaded pinion is engaged with the spline and moves axially outward on rotation of the drive shaft against the force of a biasing spring to effect engagement of the pinion with a ring gear on the flywheel of the engine. A cushion- ing mechanism is incorporated between the drive shaft and the spline and includes a pair of metal plates, one of which is secured to the drive shaft and the other to the spline. A resilient disc composed of a rubber-like material is bonded to the opposed faces of the plates and is provided with a continuous peripheral groove. The cushioning mechanism acts to absorb radial torque and axial force as the pinion is moved into engagement with the ring gear.

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