Mechanism for transmitting rotational motion from one shaft to another
AssigneeJaguar Cars Limited
InventorBryan N. V. Parsons
Life of this patent
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Abstract
A mechanism for transmitting rotational motion from a drive shaft such as a crankshaft of an engine to one or more parallel shafts such as camshafts comprising a triangular link connected to the crankshaft by an eccentric crank and connected to the camshafts by internal gears which engage with sprockets connected to the camshafts. The gear ratio between the crankshaft and camshafts is determined by the radii of the internal gears and the sprockets. The link can also be used to drive auxiliary components such as an alternator or a water pump, or to transmit drive from a starter motor to the crankshaft when the engine is started.
Claims11
A mechanism for transmitting rotational motion from a crankshaft to a camshaft comprising:
- a link member mounted at three non-linear points on a support so as to be moveable in an orbital manner with respect to the support but constrained against rotation relative thereto;
- a crankshaft drivingly connected to the link member such that rotation of the crankshaft causes the link member to undergo orbital movement with respect to the support;
- a first gear fixed to the link member so as to undergo orbital movement therewith;
- and a camshaft, lying parallel to the crankshaft, drivingly connected to the first gear such that orbital movement of the link member causes the camshaft to rotate at a speed different to that of the crankshaft.
Dependencies are inferred from the claim text.