FULL SPUR GEAR MEETS HALF SPUR GEAR - LOCKUP
FULL SPUR GEAR MEETS HALF SPUR GEAR - LOCKUP
(OP)
Does anyone know of a way to minimise the possibility of gears locking in the following scenario.
Imagine a full ratcheted gear attached to a crankshaft. At a specific distance from the crankshaft axis is another gear axis, but this is only a quadrant of a gear, with a return spring. This is used to rotate the crankshaft, and then it is released and springs back to its parked position.
The crankshaft can be stopped at any point of rotation, so the problem arises when the first tooth on the quadrant coincides directly with a tooth on the ratcheted crank gear.
No rotation can be achieved since one gear tooth is pressing squarely on its counterpart tooth. Is there any way to minimise this likelyhood, other than making both of the teeth sets really pointy, and adding some correction to the root to accommodate the pointy teeth? Thanks
Imagine a full ratcheted gear attached to a crankshaft. At a specific distance from the crankshaft axis is another gear axis, but this is only a quadrant of a gear, with a return spring. This is used to rotate the crankshaft, and then it is released and springs back to its parked position.
The crankshaft can be stopped at any point of rotation, so the problem arises when the first tooth on the quadrant coincides directly with a tooth on the ratcheted crank gear.
No rotation can be achieved since one gear tooth is pressing squarely on its counterpart tooth. Is there any way to minimise this likelyhood, other than making both of the teeth sets really pointy, and adding some correction to the root to accommodate the pointy teeth? Thanks





RE: FULL SPUR GEAR MEETS HALF SPUR GEAR - LOCKUP
Is this intended to turn the crankshaft backward as it springs back?
RE: FULL SPUR GEAR MEETS HALF SPUR GEAR - LOCKUP
No. The gear on the crank has a ratchet to allow the quadrant to rotate backwards without influencing crank rotation. Its the starting mechanism for a two stroke engine, so once the crank has been turned forward, and the engine has started, (i.e. the crank is spinning), the quadrant is just returning back to its parked postion.
RE: FULL SPUR GEAR MEETS HALF SPUR GEAR - LOCKUP
RE: FULL SPUR GEAR MEETS HALF SPUR GEAR - LOCKUP
RE: FULL SPUR GEAR MEETS HALF SPUR GEAR - LOCKUP
RE: FULL SPUR GEAR MEETS HALF SPUR GEAR - LOCKUP
I'd want a stout detent holding the gear segment securely, and safelyaway from the spinning gear.
RE: FULL SPUR GEAR MEETS HALF SPUR GEAR - LOCKUP