摘要:
A needle roller bearing (21) as a roller bearing comprises an outer ring (22) formed by connecting a plurality of arc-shaped outer ring members in a circumferential direction, and a plurality of needle rollers (23) arranged along the inner diameter surface of the outer ring (22), and an oil groove (22i) extending in a circumferential direction so as to contain a position opposed to an opening (13e) of an oil path of a housing is formed in the outer diameter surface of the outer ring member.
摘要:
A rocker arm (63) has a valve connection section (63a) to which tappet screws (70) individually in contact with a pair of engine valves are screwed such that the positions of the tappet screws in an advance/retreat direction are adjustable. The rocker arm (63) further has a cam contact section (65) in contact with a valve operating cam (69), and the rocker arm (63) is interlinked and connected to the engine valves. One end section of a first link arm (61) pivotally supported at the position where an engine body is fixed and one end section of a second link arm (62) pivotally supported by a movable shaft (68a) capable of being displaced are pivotally connected to the rocker arm (63). The rocker arm (63) is formed such that the width of the valve connection section (63a), which width is in the direction of the rotation axis of the valve operating cam (69), is greater than the width of other portions. This structure enables the amount of lift of the engine valves to be continuously varied, and makes a valve operating device more compact while achieving excellent following ability of the engine valves in opening and closing operation.
摘要:
A valve gear system of an engine, wherein a first connection part (61a) and a second connection part (62a) are connected to a rocker arm (36) parallel with each other so as to be rotated relative to each other, and the movable support part (62b) of a second link arm (62) is disposed on the engine valve (19) side of the fixed support part (61b) of a first link arm (61). Thus, the size of the system can be reduced, the reliability and durability of a drive means can be increased while securing the follow-up capability of opening/closing operations, and the lift amount of the engine valve can be continuously varied.
摘要:
A needle roller bearing has an outer ring having two outer ring members (12) split by a split line extending in the direction of the axis of the bearing, and also has needle rollers rollably placed on the raceway surface of the outer ring. The needle roller bearing satisfies the relationship of L/w
摘要翻译:滚针轴承具有外圈,该外圈具有由在轴承的轴线方向上延伸的分割线分开的两个外圈构件(12),并且还具有可滚动地放置在外圈的滚道表面上的滚针。 滚针轴承满足L / w <0.5的关系,其中L是外环部件(12)组与穿过其间的对接部分的一组滚针(14)之间的非接触长度 两个外圈构件,并且w是每个滚针(14)的有效长度。
摘要:
A valve system of an engine, wherein a rocker arm swung according to the movement of a valve cam is brought into contact with an engine valve through a hydraulic tappet. A receiving member (41) receiving the hydraulic tappet (12) is slidably fitted to the rocker arm (13) to which the hydraulic tappet (12) is fitted, a restriction part (29) facing the receiving member (41) is formed on the opposite side of the hydraulic tappet (12), and an adjust screw (44) for adjusting a clearance between the restriction part (29) and the receiving member (41) when the engine valve is closed is threaded to an engine body (5) so that the forward/backward movement position thereof can be adjusted to bring it into contact with the receiving member (41) when the engine valve is closed. Thus, the lift of the engine valve can be easily and accurately adjusted while eliminating complicated machining and production control to openably drive the engine valve by the rocker arm through the hydraulic tappet.