Bearing structure

• Main Authors: HOSHIKAWA HIROAKI, OOKUMA SATORU
• Format: Patent
• Language: Chinese; English
• Published: 10.05.2017
• Subjects: BEARINGS; BLASTING; COMBUSTION ENGINES; COMBUSTION ENGINES IN GENERAL; CRANKCASE VENTILATING; ELEMENTS OR CRANKSHAFT MECHANISMS; ENGINE PLANTS IN GENERAL; ENGINEERING ELEMENTS AND UNITS; FLEXIBLE SHAFTS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; INTERNAL-COMBUSTION PISTON ENGINES; LIGHTING; LUBRICATING INTERNAL COMBUSTION ENGINES; LUBRICATING OF MACHINES OR ENGINES IN GENERAL; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; ROTARY BODIES OTHER THAN GEARING ELEMENTS; SHAFTS; STEAM ENGINES; THERMAL INSULATION IN GENERAL; WEAPONS

The invention discloses a bearing structure. According to the invention, a main bearing metal (41) has: a main bearing metal planar portion (42); a main bearing metal oil groove (44) in which a main-bearing-metal-side oil groove (43) extending in a circumferential direction is formed along the entirety of an inner circumferential surface; a first oil hole (48), one end thereof opening into the main-bearing-metal-side oil groove (43) and the other end thereof communicating with a lower end of an in-block oil channel (27) that extends from a cylinder block oil gallery to a crankshaft bearing (12); and a second oil hole (49), one end thereof opening into the main-bearing-metal-side oil groove (43) and the other end communicating with an upper end of an in-cap oil channel (28) that extends from the crankshaft bearing (12) to a control shaft bearing (17). 主轴瓦(41)具有：主轴瓦平面部(42)；主轴瓦油槽部(44)，其在内周面的整个长度上形成有沿着周向的主轴瓦侧油槽(43)；第1油孔(48)，其端在主轴瓦侧油槽(43)处开口，另端与缸体内油通路(27)的下端连通，该缸体内油通路(27)从气缸体的油道到达至曲轴轴承部(12)；以及第2油孔(49)，其端在主轴瓦侧油槽(43