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公开(公告)号：US4015485A
公开(公告)日：1977-04-05
申请号：US598565
申请日：1975-07-24
CPC分类号： F16C3/08 , Y10T74/2174 , Y10T74/2185
摘要： A crank shaft for a multi-cylinder, short stroke internal combustion engine in which the diameters of the crank pin and of the shaft journal overlap each other, and in which the crank web decreases in thickness approximately from the center of the crank pin with increasing distance from the shaft center. In the crank webs within the region of the crank pin, relief bores are provided the axes of which are inclined with regard to the axis of said shaft journals. The relief bores are designed as blind bores with a flat bottom surface and with a circumferential surface merging with the flat bottom surface along a rounded surface section. The merging portion nearest to the area of the respective pertaining shaft journal is located approximately in the plane perpendicular to the longitudinal axis of the crank shaft and approximately in the middle between the crank pin and the shaft journal. With a diameter ratio of the crank pin to the shaft journal of about 0.8, the diameter of the relief bore corresponds to from 0.35 to 0.55 times the diameter of the shaft journal but at a maximum is so great that the overlapping of the respective relief bore with the outer contour of the respective adjacent web is spaced from the shaft axis by a minimum distance of 0.6 times the diameter of the shaft journal and that the respective relief bore is at a minimum spaced from the rounded merging surface section of the crank pin with the respective adjacent web by a distance of approximately 12mm.
摘要翻译： 一种用于多缸短行程内燃机的曲轴，其中曲柄销和轴颈的直径彼此重叠，并且其中曲柄腹板的大小近似于曲柄销的中心逐渐减小， 距离轴心的距离。 在曲柄销区域内的曲柄腹板中，提供了浮雕孔，其轴线相对于所述轴轴颈的轴线倾斜。 浮雕孔被设计为具有平坦底表面的盲孔，并且具有沿着圆形表面部分与平坦底表面合并的圆周表面。 最靠近相应轴颈的区域的合并部分大致位于与曲轴的纵向轴线垂直的平面中，大致位于曲柄销和轴轴颈之间的中间。 曲柄销与轴颈的直径比约为0.8，泄压孔的直径对应于轴颈直径的0.35至0.55倍，但最大值大到相应的卸载孔的重叠 其中相应的相邻腹板的外轮廓与轴轴线间隔开轴颈的直径的0.6倍的最小距离，并且相应的释放孔与曲柄销的圆形合并表面部分间隔开最小， 各个相邻的纸幅的距离约为12mm。
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