Abstract:
A roller assembly for a diesel engine used in a high mileage vehicle includes a roller having an exterior roller surface and an interior surface that defines a bore extending therethrough. A pin is positioned in the bore and defines an exterior pin surface. A plurality of rolling elements is positioned between the exterior pin surface and the roller interior surface. Each of the rolling elements rollingly engages the exterior pin surface and the roller interior surface. The roller assembly defines a clearance of between about 0.01 mm to about 0.03 mm between the rolling elements, the exterior pin surface and the interior surface. The roller assembly is configured to achieve extended life criteria wherein the clearance does not increase to more than 0.02 mm to 0.06 mm after 500,000 miles of travel of a vehicle powered by a diesel engine having the roller assembly installed therein.
Abstract:
A steering axle assembly (10) includes a wheel end having a knuckle section comprising(26) a first arm (30a) and a second arm (30b) each extending therefrom. The steering axle assembly includes an axle beam (12) having a connecting end (14). A pin (50) is disposed in respective bores of the first and second arms and of the connecting end. The steering axle assembly includes a self-lubricated bearing system that including a first tubular bushing (62), a second tubular busing (72) and an annular thrust bearing (80). The self-lubricated bearing system has an adequate amount of lubricant therein at a beginning of life state and the amount of the lubricant being sufficient for an end of life state defined by at least one million miles of operation of the heavy duty truck, without replenishment of the lubricant.
Abstract:
A spherical plain bearing and method of assembling the same is disclosed. The bearing has an outer ring having a bore, a concave surface, and at least one fracture. The bearing further includes an inner ring having a convex surface. The convex surface is in sliding disposition with the concave surface when the inner ring is disposed in the bore. The bearing has a groove in a face of the outer ring radially outside a first opening of the bore. The bearing further includes a band coupled to a portion of the outer ring defining the groove. The band retains the outer ring around the inner ring when the inner ring is disposed in the bore.
Abstract:
A shell-like insert (20) made from a low-friction material is useful in a coupler (10) for railway cars. The coupler may have a male connector (12) on one car and a female connector (14) on the other. The connectors conform to each other and provide a clearance space therebetween. The male connector may include a ball stud (12a) and the female connector may provide a socket (15) for the ball. The insert conforms to the clearance space and is made from a low-friction material, such as PTFE, a filament wound composite or an epoxy- impregnated PTFE and glass-fiber material, or the like. A railway car assembly may include two cars joined by a coupler (10) as described herein. The cars may be joined by providing a rear follower (16) and a front follower (18) in the female connector to provide the socket, and positioning an insert (20) in the socket between the ball and one or both followers.
Abstract:
In a hybrid spherical bearing (10), a ceramic ball (12) is provided and has a bore extending at least part way there through. A metallic outer race (14) is also provided and has an inner engagement surface (16) contoured to a shape complementary to a shape defined by an outer diameter of the ceramic ball. The ceramic ball is positioned within the outer race and slidably and rotatably engages the inner engagement surface.
Abstract:
A bearing (10) includes an outer member (12) having a base portion (14) and a first concave surface (16). The base portion (14) has a first convex surface (20) extending from a second axial end (22) thereof. The base portion (14) and the first concave surface (16) cooperate to define a cavity (24) in the outer member (12). The base portion (14) has a first aperture (26) extending therethrough. The bearing includes an inner member (28) having a second convex surface (30) and is positioned partially in the cavity (24) such that the second convex surface (30) slidingly engages the first concave surface (16). The inner member (28) has a second aperture (27) extending therethrough. The bearing includes an anchor member (34) defined by a shaft (36) and a head (38) extending radially outward from the shaft (36). A portion of the shaft (36) extends through the first aperture (26) and is removably secured in the second aperture (27). The head (38) has a second concave surface (40) that slidingly engages the first convex surface (20).
Abstract:
A cage for a roller bearing includes a first annular portion and a second annular portion opposite the first annular portion and a plurality of pillars interconnecting the first annular portion and the second annular portion. Adjacent pairs of the pillars each define a pocket for holding rollers. Each of the pockets is configured to receive at least one roller. One or more radially outward facing concave roller support surface is formed in one or more of the pillars at a position proximate a radially outer edge of the pillar. The concave roller support surface is configured to radially outwardly support a portion of one of the rollers.
Abstract:
A bearing assembly includes an inner member having an outer engagement surface and an outer race. The outer race has an inner surface defining a first end and a second end and an inner engagement surface therebetween, the inner engagement surface is positioned on the outer engagement surface of the inner member. A first annular groove is formed in the inner surface, proximate one of the first end and the second end. A second annular groove is formed in the inner surface and is positioned axially inward from the first annular groove. An external seal is positioned in first annular groove and slidably engages the inner member. An internal seal is positioned in the second annular groove and slidingly engages the inner member.
Abstract:
A load slot bearing system for a mounting system for a gearbox on a geared turbofan engine includes a load slot bearing assembly (10) having a cobalt alloy inner member (12) and a precipitation-harden- able alloy outer member (14). The inner member (12) defines an outer engagement surface (18) and the outer member (14) defines an inner engagement surface (22) slidably and rotatably engaged with the- outr engagement surface (18). One of the outer engagement surface (18) or the inner engagement surface (22) has boron diffused therein. The load slot bearing system includes first and second slots (20) extending inward from a face (21) defined by the outer member (14), the second slot being positioned generally diametrically opposite the first slot. A first element (44) is located in the bore (16) of the inner member (12) of the load slot bearing assembly (10) and is connected to the inner member (12). A second element (46) is connected to the outer member (14) of the load slot bearing assembly (10).
Abstract:
A high-cycle, short range-of-motion linkage apparatus (33) is provided for actuation of a positioning device. The linkage apparatus (33) includes a pivot member (26) having a stem (30)extending therefrom, a positioning member (32)including a receiving portion (31) into which the stem (30) is removably secured, and at least one spherical plain bearing (12, 14) secured to the pivot member. The spherical plain bearing has an inner member (12) having an outer engagement surface and a bore (16) extending at least partway therethrough, an outer member (14)positioned at least partially around the inner member (12), the outer member (14) having an inner engagement surface contoured to a shape complementary to the outer engagement surface of the inner member (12), and a liner disposed between the inner engagement surface of the outer member (14) and the outer engagement surface of the inner member (12), the liner comprising polytetrafluoroethylene and a phenolic resin reinforced with aramid fibers.