Patent ID: 7419432
Filing Date: 2008-09-02
Classification: B63H,F16D

Abstract:
1. A coupling joint structure for a power train of a boat where a revolution of an engine is transmitted to a propeller shaft by mounting the engine in the body of the boat and a propeller is provided at the back of the engine, the coupling joint structure comprising a first coupler on a driving side to an output shaft of the engine; a second coupler on a driven side to the propeller shaft of the propeller; extending pawl pieces on the driving side from a body of the first coupler on the driving side toward the rear of the boat; extending pawl pieces on the driven side from a body of the second coupler on the driven side toward the front of the boat; a damper member interposed between the pawl pieces on the driving side and the pawl pieces on the driven side, wherein the damper member is adapted to transmit the revolution of the engine to the damper member via the pawl pieces on the driving side, and to transmit the revolution of the damper member to the pawl pieces on the driven side, and wherein each of the pawl pieces on the driving side is provided with a wall thickness part on the driving side in which a wall thickness (t wherein each of the pawl pieces on the driven side is provided with a wall thickness part on the driven side in which a wall thickness (t wherein the pawl pieces on the driving side and the driven side overlap each other in an axial direction, wherein the wall thickness parts are formed only on portions of the pawl pieces of the driving side and the driven side that do not make contact with the damper member, and wherein the wall thicknesses (t