公开(公告)号：US3915141A

公开(公告)日：1975-10-28

申请号：US43582874

申请日：1974-01-23

Applicant: MASCHF AUGSBURG NUERNBERG AG

Inventor： OTTL ADOLF ,  PFLEIDERER ERNST

IPC: F02B3/06 ,  F02B23/06 ,  F02B75/02 ,  F02F3/00 ,  F02F3/22

CPC classification number: F02B23/0696 ,  F02B3/06 ,  F02B2075/027 ,  F02F3/0023 ,  F02F3/22 ,  F05C2201/021 ,  F05C2201/0448 ,  Y02T10/125 ,  Y10T29/49256

Abstract: A piston, particularly for use in heavy diesel motors, is built up of a piston head, an intermediate piece and a lower piston body piece. The piston head has internal annular ridges extending down to a plane joint surface and of a minimum height sufficient to accommodate tapped holes for the screws that fasten the middle piece to the piston head. The middle piece has a disc or annular base with a lower annular mounting surface and upwardly extending annular webs that meet the ridges of the piston head. The webs are disposed on conical surfaces that have their vertices on the piston axis, the outermost one having a vertex below the middle piece and the other having its vertex above. Additional webs and ridges may be used for very wide pistons. The bottom piece has a tapered annular upward extension meeting the base of the middle piece beneath the supporting webs and provision for screwing the bottom and middle piece together. An upper skirt forms part of the piston head and carries grooves for piston rings. An upward projection of the lower skirt serves to center the upper skirt. Efficient transmission of forces to the piston rod bearing with relatively light component parts and even distribution of thermal stresses is obtained as well as freedom from loosening the structure under suction.

Abstract translation: 特别是用于重型柴油发动机的活塞由活塞头，中间件和下部活塞主体构成。 活塞头具有向下延伸到平面接合表面的内部环形脊，并且具有足够的最小高度以容纳用于将中间件紧固到活塞头的螺钉的螺纹孔。 中间件具有带有下环形安装表面的盘或环形底座，并且向上延伸的环形腹板与活塞头的脊部相接。 腹板设置在其顶点在活塞轴上的锥形表面上，最外侧的顶点在中间件下方具有一个顶点，另一个顶点位于顶部。 额外的腹板和脊可用于非常宽的活塞。 底部件具有锥形的环形向上延伸部，其在支撑腹板下面的中间件的基部，并将底部和中间部件拧紧在一起。 上裙部形成活塞头的一部分，并承载活塞环的槽。 下裙部的向上突出部用于使上裙部居中。 获得了具有相对较轻的部件和均匀的热应力分布的活塞杆轴承的力的高效传递，并且不会在抽吸下松动结构。

公开(公告)号：US3903753A

公开(公告)日：1975-09-09

申请号：US44174974

申请日：1974-02-12

Applicant: MASCHF AUGSBURG NUERNBERG AG

Inventor： OTTL ADOLF ,  PFLEIDERER ERNST

IPC: F16C7/00 ,  F16C7/02

CPC classification number: F16C7/023 ,  Y10T74/2162 ,  Y10T403/645

Abstract: For ease of construction, maintenance and repair of piston rods for high power internal combustion engines, particularly large Diesel engines, the piston rod is made of at least three composite parts, one of them being formed with the bearings for the piston pin, and the second and third parts being formed with matching portions to provide a bearing for the crankshaft, the first and second parts being connected and having a junction plane that has matching, fitting contact surfaces located approximately in the middle between the axes of the piston pin and the crankshaft, and being secured together by screws located circumferentially around the matching fitting contact surfaces, for example by engaging lateral projections formed on the first and second parts and surrounding the power-transmitting portion, and engaging power-transmitting surfaces of the parts of the piston rod.