COOLING FAN STRUCTURE OF INTERNAL COMBUSTION ENGINE

• Main Author: TAKI MASAFUMI
• Format: Patent
• Language: English; Japanese
• Published: 04.04.2016
• Subjects: BLASTING; COMBUSTION ENGINES; COMBUSTION ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES; COOLING OF MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; INTERNAL-COMBUSTION PISTON ENGINES; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; NON-POSITIVE DISPLACEMENT PUMPS; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; STEAM ENGINES; WEAPONS

PROBLEM TO BE SOLVED: To sufficiently secure a volume of cooling air by axially miniaturizing a central portion of a centrifugal cooling fan, in a cooling fan structure of an internal combustion engine including the centrifugal cooling fan relatively rotatably supported by a crank shaft through a bearing coaxial with the crank shaft, and a centrifugal weight supported by a supporting holder rotated with the crank shaft, and engaged with the centrifugal cooling fan according to increase of a rotating speed of the crank shaft.SOLUTION: A centrifugal weight 72 is entirely disposed outside with respect to a bearing 58 in a radial direction of a crank shaft 30.SELECTED DRAWING: Figure 3 【課題】クランクシャフトにそれと同軸のベアリングを介して相対回転可能に支持される遠心式冷却ファンと、クランクシャフトとともに回転する支持ホルダに支持されるとともに前記クランクシャフトの回転数増大に応じて前記遠心式冷却ファンに係合する遠心ウエイトとを備える内燃機関の冷却ファン構造において、遠心式冷却ファンの中心部の軸方向の小型化を図って冷却風量を充分に確保する。【解決手段】遠心ウエイト７２の全体が、クランクシャフト３０の半径方向でベアリング５８よりも外側に配置される。【選択図】 図３