CONNECTING ROD OF INTERNAL COMBUSTION ENGINE

• Main Authors: KITTAKA TOMOYUKI, TAJIMA KOKI
• Format: Patent
• Language: English; Japanese
• Published: 29.08.2019
• Subjects: BEARINGS; BLASTING; ELEMENTS OR CRANKSHAFT MECHANISMS; ENGINEERING ELEMENTS AND UNITS; FLEXIBLE SHAFTS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; ROTARY BODIES OTHER THAN GEARING ELEMENTS; SHAFTS; THERMAL INSULATION IN GENERAL; WEAPONS

To provide a connecting rod of an internal combustion engine capable of preventing a pressure from locally concentrating on an inner peripheral face of a hole to which a crank shaft is inserted.SOLUTION: A connecting rod for connecting a first end portion and a second end portion, includes a wide portion 32 of which a width orthogonal to both of a longitudinal direction and a thickness direction from a column portion 20 extended in the longitudinal direction orthogonal to the thickness direction, is gradually expanded, a wide width central portion 32a overlapped to a line segment orthogonal to a central axis of the connecting rod connecting the first end portion and the second end portion, and a pair of wide width outer edge portions 32b holding the wide width central portion from a width direction. The column portion includes a column central portion 20a and a column outer edge portion 20b, each of the pair of wide width outer edge portions has a thickness thicker than the wide width central portion, each of the pair of column outer edge portions has a thickness thicker than the column central portion, a ratio of a cross-sectional area orthogonal to the line segment of the wide width central portion, to a unit area orthogonal to the line segment is smaller than a ratio of a cross-sectional area orthogonal to the line segment of the column central portion to the unit area.SELECTED DRAWING: Figure 2 【課題】クランクシャフトが挿入される孔の内周面に局所的に圧力が集中することを抑制する内燃機関のコンロッドの提供。【解決手段】第１端部と第２端部とを繋ぐコンロッドは、厚み方向に直交する長手方向に延びたコラム部２０から長手方向及び厚み方向の双方に直交する幅が徐々に広がった幅広部３２と、第１端部と第２端部とを繋ぐコンロッドの中心軸に直交する線分に重なる幅広中心部３２aと、幅広中心部を幅方向から挟む一対の幅広外縁部３２bを含み、コラム部はコラム中心部２０aとコラム外縁部２０bとを含み、前記一対の幅広外縁部のそれぞれは幅広中心部よりも厚みが厚く、一対のコラム外縁部のそれぞれは前記コラム中心部よりも厚みが厚く、前記線分に直交する単位面積に占める、前記幅広中心部の前記線分に直交する断面積の割合は、前記単位面積に占める、前記コラム中心部の前記線分に直交する断面積の割合よりも小さくした内燃機関のコンロッド。【選択図】図２