CRANK CASE, CAP MEMBER, AND CRANK CASE MANUFACTURING METHOD

• Main Authors: YOSHIDA TAKAHIRO, UEDA SHUSAKU
• Format: Patent
• Language: English; Japanese
• Published: 07.01.2021
• Subjects: ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES; BLASTING; COMBUSTION ENGINES; CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ENGINEERING ELEMENTS AND UNITS; FRAMES, CASINGS, OR BEDS OF ENGINES OR OTHER MACHINES ORAPPARATUS NOT SPECIFIC TO AN ENGINE, MACHINE, OR APPARATUSPROVIDED FOR ELSEWHERE; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MECHANICAL ENGINEERING; STANDS OR SUPPORTS; THERMAL INSULATION IN GENERAL; WEAPONS

To provide a crank case which makes a shape and a cut processing portion of each component proper to facilitate manufacturing, and to provide a cap member and a manufacturing method of the crank case.SOLUTION: A crank case includes: a crank chamber 2 in which a crank shaft 1 is disposed; bearing caps 32, each of which is fixed to a bearing lower part 31 in the crank chamber 2 and forms a bearing metal attachment part 3 and in which the crank shaft 1 is inserted; double-end cap upper parts 42, each of which is fixed to a double-end cap lower part 41 in the crank chamber 2 and forms a double-end cap 4 and in which one end side of the crank shaft 1 is inserted; and seal members 5, each of which is attached to an end surface of the double-end cap 4. End surfaces of the double-end cap upper part 42 and the double-end cap lower part 41 are cut surfaces and located on the same plane.SELECTED DRAWING: Figure 1 【課題】構成各部品の形状及び切削加工箇所を的確にして、製造を容易化したクランクケース、キャップ部材及びクランクケースの製造方法を提供する。【解決手段】クランク軸１が内部に配置されたクランク室２と、クランク室２内の軸受け下部３１に固定されて軸受メタル装着部３を構成しクランク軸１を挿通させている軸受けキャップ３２と、クランク室２内の両端キャップ下部４１に固定されて両端キャップ４を構成しクランク軸１の一端側を挿通させている両端キャップ上部４２と、両端キャップ４の端面に取付けられたシール部材５とを備え、両端キャップ上部４２及び両端キャップ下部４１の端面は、切削加工面であって、同一平面上にある。【選択図】図１