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 needle bearing (11), comprising an outer ring (13) having a plurality of outer ring members (12) divided by a parting line extending in the axial direction of the bearing, a plurality of needle rollers (14) rollingly disposed on the raceway surface of the outer ring (13), and a retainer (15) holding the intervals of the needle rollers (14). Each of the outer ring members (12) comprises a projection (12a) as a positioning engagement part for positioning the outer ring (13) on a housing at a position displaced from the circumferential center part of its outer peripheral surface and an engagement claw (12b) projecting from the axial end part of the outer ring member (12) to the radial inner side to restrict the axial movement of the retainer (15).
摘要:
A needle roller bearing has an outer ring (13) having a split section in the circumferential direction, rollers (14) rollable along the inner circumferential surface of the outer ring (13), and a retainer (15) for retaining the rollers (14). The outer ring (13) has an engagement claw (12b) projecting radially inward at an end in the width direction of the outer ring and restricting the movement in the axial direction of the retainer (15).
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.
摘要:
An engine, wherein an intake valve openably driven by an intake side valve system having an intake side camshaft and an exhaust valve openably driven by an exhaust side valve system having an exhaust side camshaft are disposed in a cylinder head forming a part of an engine body. The intake side camshaft (30) is disposed at a position such that the distance thereof from a combustion chamber (17) is larger than that in the case of the exhaust side camshaft (35) along the axis (C) of the cylinder of the engine body (11) to position the intake side camshaft higher than the exhaust side camshaft (35). Thus, the exhaust side valve system can be efficiently lubricated and cooled by easily using a lubricating oil, used for lubricating and cooling the intake side valve system, for the exhaust side valve system.
摘要:
A variable valve lift device of an internal combustion engine, wherein a first link rocker arm (58) rotatably pivoted at the fixed position of an engine body is rotatably connected to a rocker arm (31). A movable pivot shaft (60) rotatably pivoting the other end part of a second link arm (59) having one end part rotatably connected to the rocker arm (31) comprises crank webs (61a) holding the second link arm (59) from both sides and connection parts (61c) integrally connecting both crank webs (61a) to each other at positions where the interference thereof with the second link arm (59) can be avoided, and is connected to a crank member (61) formed in a crank shape so that the crank member (61) can be drivingly rotated by a drive means. Thus, the lift amount of an engine valve can be steplessly varied, the torsional rigidity of the crank member can be secured while securing the assembling workability of the second link arm to the crank member, and the size of the device can be reduced.