Abstract:
A bearing apparatus for including a camshaft, a plurality of cam blocks disposed in an axial direction on the camshaft, a housing member including an arc concave portion, a cap member which is fixed to the housing and includes an arc concave portion, a roller bearing interposed between the arc concave portion of the housing member and the arc concave portion of the cap member so as to rotatably support the camshaft, and annular first and second control rings which are separately provided from the camshaft, and are press-fitted and fixed to an outer surface of the camshaft at opposite side portions of the roller bearing in the axial direction. Surfaces of the first and second rings that face each other are formed as slide surfaces, and the slide surfaces come in contact with opposite side surfaces of at least one of the housing member and the cap member to receive an axial load.
Abstract:
A cage includes a radially inward-side annular plate, a radially outward-side annular wall, a plurality of pillar portions, and pockets formed in the pillar portions. Rollers are rotatably retained in the pockets. An inner peripheral surface of the radially outward-side annular wall is formed so as to be oblique toward a radially outward direction. A radially outward-side end surface of each of the rollers has a spherical surface shape.
Abstract:
The present invention provides a split outer race for use in a rolling bearing. The split outer race is formed by bending a strip-shaped metallic plate into a substantially semicircle shape. At least one end of the split outer race in a circumferential direction has a concave-and-convex shape including a first slope portion which is inclined to an axial direction and a second slope portion inclined in a direction opposite to a direction in which the first slope portion is inclined. An edge portion formed on an inner surface of the one end in the circumferential direction has a round shape.
Abstract:
A rocker arm includes: a body that is made of sheet metal and includes a pair of side walls; and a pair of axial holes that are respectively formed through the pair of side walls and have a first diameter and through which an axis is inserted. The pair of axial holes include thickened portions formed partially or overall of circumference of the pair of axial holes, and the thickened portion is formed by expanding a hole that has a second diameter smaller than the first diameter and is formed in a pre-arranged range for forming the axial hole in a blank material so as to causing plastic flow in a metallic material of the circumference of the hole
Abstract:
A balancer-shaft-supporting bearing unit is structured in such a manner that a balancer shaft, on which a driven gear that meshes with a driving gear provided on a crankshaft of an internal combustion engine is provided, is rotatably supported by a shaft-supporting portion of a housing via a roller bearing. Between the balancer shaft and the housing, a load-receiving portion that has a receiving face that receives the balancer shaft when the balancer shaft is elastically deflected by an impact load applied to the driven gear is formed at at least one of positions that are close to respective axial end portions of the driven gear.
Abstract:
The clearance between the outer peripheral surface of an annular portion of a cage and the inner peripheral surface of each of rib portions of outer-ring split pieces is set to be smaller than the clearance between the radial end surface of a projection portion of the cage and the inner peripheral surface of each of body portions of the outer-ring split pieces. When a centrifugal force due to engine rotation acts upon the cage, the inner peripheral surface of each of the rib portions of the outer-ring split pieces touches the outer peripheral surface of the annular portion of the cage before the inner peripheral surface of each of the body portions of the outer-ring split pieces touches the radial end surface of the projection portion of the cage. Thus, the radial displacement of the cage can be prevented in good time.
Abstract:
The shaft apparatus comprising a shaft, blocks fitted to an outer surface of the shaft in an axial direction at predetermined intervals, and a roller bearing. The roller bearing includes an inner ring fitted and fixed to the outer surface of the shaft, an outer ring, and a plurality of rollers interposed between the inner and outer rings to roll. First and second control rings for controlling the movement of the outer ring in the axial direction of the shaft are disposed between the shaft and the outer ring.
Abstract:
A rocker arm formed of material in a shape of sheet has a pair of side wall portions, a connection portion for a valve stem receiving portion and a connection portion for a pivot receiving portion which interconnect the side wall portions, and an open portion for arranging a roller which is formed between the two connection portions. A distance between outer side surfaces of the pair of side wall portions in the connection portion for the valve stem receiving portion is reduced in a direction from upper edges to lower edges in a step-like shape having two or more step differences, whereby a first outer side surface and a second outer side surface are formed.
Abstract:
The clearance between the outer peripheral surface of an annular portion of a cage and the inner peripheral surface of each of rib portions of outer-ring split pieces is set to be smaller than the clearance between the radial end surface of a projection portion of the cage and the inner peripheral surface of each of body portions of the outer-ring split pieces. When a centrifugal force due to engine rotation acts upon the cage, the inner peripheral surface of each of the rib portions of the outer-ring split pieces touches the outer peripheral surface of the annular portion of the cage before the inner peripheral surface of each of the body portions of the outer-ring split pieces touches the radial end surface of the projection portion of the cage. Thus, the radial displacement of the cage can be prevented in good time.
Abstract:
A rocker arm includes: a body that is made of sheet metal and includes a pair of side walls; and a pair of axial holes that are respectively formed through the pair of side walls and have a first diameter and through which an axis is inserted. The pair of axial holes include thickened portions formed partially or overall of circumference of the pair of axial holes, and the thickened portion is formed by expanding a hole that has a second diameter smaller than the first diameter and is formed in a pre-arranged range for forming the axial hole in a blank material so as to causing plastic flow in a metallic material of the circumference of the hole.