Abstract: A power distribution apparatus of high reliability and long life and that can be reduced in size. A differential gear identified as a power transmission mechanism includes a drive shaft, a diff case provided with an opening that opens towards the drive shaft, constant velocity universal joints connected to the drive shaft, and side gears connected to drive shafts via the constant velocity universal joints. Outer races of the constant velocity universal joints are formed at the end of drive shafts. Inner races of the constant velocity universal joints are formed at side gears. The outer races are arranged so as to block an opening.

Abstract: Automatic installation of a circlip is facilitated even when an axial length (inner race width) of a protrusion of an inner race is reduced. An inner race (6) is installed in a constant velocity universal joint for transmitting torque while allowing angular displacement between itself and an outer race, with a shaft being inserted in a shaft hole (12) formed in an inner bore to be spline-fitted thereto so as to be prevented from coming off by virtue of the circlip. A two-step chamfer (20) having different chamfer angles is provided at a shaft insertion side end portion of the shaft hole (12). The two-step chamfer (20) includes a first chamfer section (21) situated on a shaft hole opening side and a second chamfer section (22) provided on the side opposite to the shaft hole opening so as to be continuous with the first chamfer section (21). The chamfer angle ? of the first chamfer section (21) is set larger than the chamfer angle ? of the second chamfer section (22).

Abstract: The present invention provides a fixed constant velocity universal joint that can be made compact, has little decrease in load capacity even when the fixed constant velocity universal joint is made compact and is at an operating angle, and can improve high angle strength and durability through lessening instances in which a ball runs over a track at a high angle. A cage 28 includes four pockets 29, a pair of long pockets 30 of which a circumferential direction spacing is wide and a pair of short pockets 31 of which the circumferential direction spacing is narrow. The pair of long pockets 30 are shifted by 180 degrees along a circumferential direction and a pair of short pockets 31 are shifted by 180 degrees along the circumferential direction. The long pockets 30 and the short pockets 31 are alternately disposed along the circumferential direction. A long pocket 30 houses two balls 27. A short pocket 31 houses one ball.

Abstract: A self-retained constant velocity joint has a ring-shaped cage disposed substantially concentrically to and spaced radially from a race of the joint. A plurality of grooves in and distributed circumferentially about the race preferably includes longitudinal, clockwise and counter-clockwise grooves that extend substantially axially and communicate radially through the arcuate surface. A ball is located in each groove and extends through respective windows in the cage. Preferably, the windows associated with the clockwise and counter-clockwise grooves extend circumferentially further than the windows associated with the longitudinal grooves. The cage carries an arcuate face that is one of a convex and concave profile and radially opposes the arcuate surface that is the other of the convex and concave profiles. The radial distance between the face and surface is such that axial movement between the race and cage is limited by intermittent contact of the face with the surface.

Abstract: A fixed-center constant velocity joint has a race located concentrically to a rotational first axis, and a ring-shaped cage located concentrically to a rotational second axis. Both the race and the cage are centered to a common center point lying on the first and second axes regardless of the angular state of the joint. A spherical surface carried by the race radially opposes a spherical face carried by the cage for angular movement with respect to the center point. The surface and face are in close or contacting relationship to prevent telescoping movement with respect to the first and second axes.

Abstract: A constant velocity joint having an inner hub and an outer hub (1) in which races or tracks (3) associated with one another in pairs are provided and with balls received in respective pairs of races or tracks for transmitting torque. The constant velocity joint is further provided with at least one joint connector (2) which, when the joint is assembled, is connected in a rotationally fixed manner to one of the hubs (1) by mating profile members (6, 7) in order to transmit torque.

Abstract: A constant velocity fixed joint having an outer and inner joint part forming pairs of ball tracks, wherein the track base lines of the pairs of tracks each form an opening angle relative to one another. The track base lines of the outer ball tracks, at the attaching part end, form a radius whose center is positioned on a first longitudinal axis and is offset by a first offset from the central plane of the outer joint part towards the attaching part. The track base lines of the inner ball tracks, at the aperture end, comprise a radius whose center is positioned on the second longitudinal axis and is offset by a second offset from the central plane of the inner joint part towards the aperture.

Abstract: A constant velocity joint includes an outer race and an inner race arranged within the outer race. The joint includes a cage arranged between the outer race and inner race and a rolling element arranged between the outer race and inner race. The cage includes relatively flat portions on an outer face the cage surrounding window areas that hold the rolling elements in place.

Abstract: A drive shaft is configured from a shaft body, a shaft portion provided with extensions and boot mounting parts coaxially and integrally formed on ends thereof, and constant velocity joints attached to ends of the extensions via interior members. The outer diameter of intermediate portions of the extensions is smaller than that of the ends and the boot mounting parts. Formed on the opening-sides of the inner surfaces of the exterior members of the constant velocity joints are flanks that face outward and leave a slight clearance with the intermediate portions. Edges forming the boot mounting part sides of the intermediate portions are set to positions corresponding to outer edges of the flanks, and tapered portions connect the edges and the boot mounting parts.

Abstract: A ball and socket joint (1) which is constructed as a counter track joint and which includes an inner hub (4) in which first outer grooves (16) and second outer grooves (17) are arranged in an alternating and distributed manner around the axis (9) on the outer surface of the inner hub. An annular cage (5) which is guided on the inner hub (4) is arranged between the inner hub (4) and an outer hub. Insertion surfaces (24, 25) are provided, which extend from the driven-side end, which have an undercut free design, and which extend toward the drive-side end.

Abstract: A displacement unit and a jointed shaft which includes such a displacement unit. The displacement unit is formed of an external part and of an internal part which can be displaced in an axial direction in the external part, in which the external and internal parts have guide paths provided with balls arranged in the guide paths for the transmission of torque.

Abstract: A vehicular steering apparatus, includes an input shaft for transmitting rotation from a steering wheel, an intermediate shaft including an upper intermediate shaft, a lower intermediate shaft and a buffer coupling for coupling the upper intermediate shaft and the lower intermediate shaft, an output shaft for driving a steering mechanism on a side of a vehicle, and universal joints for respectively coupling the input shaft and the upper intermediate shaft as well as the lower intermediate shaft and the output shaft, in which at least one of the universal joints is a universal ball joint.

Abstract: Provided is a slidable constant velocity universal joint which holds an elastic member (coil spring) in a stable attitude even if an associated shaft makes an oscillating motion, thereby achieving an improvement in terms of stability in torque transmission. The slidable constant velocity universal joint includes an outer joint member (4) connected to a power transmission member (2), and an inner joint member (5) connected to an end portion of a shaft (1), with torque transmission being possible between the outer joint member (4) and the inner joint member (5) while allowing angular displacement and axial displacement. At a forward end of the shaft (1), there is provided an elastic member (21) for elastically urging the outer joint member (4) toward the power transmission member (2), and, between the elastic member (21) and the forward end of the shaft (1), there is interposed a bearing member (24) for guiding the forward end of the shaft (1) while in contact therewith.

Abstract: A constant velocity join has an input shaft side member having first guiding grooves formed in it; an output shaft member having guiding grooves formed in it, the second guiding grooves intersecting the first guiding grooves; a retainer having retaining windows formed in it; and a torque transmission member that is held so as to be displaceable along the retaining windows of the retainer and in which a first ring body and a second ring body are rotatably supported by a first shaft body and a second shaft body through a needle bearing, the first shaft body and the second shaft body being in rotating contact with side walls of the first guiding grooves and/or with side walls of the second guiding grooves.

Abstract: A constant velocity universal ball joint 11 having first and second outer ball tracks 16, 18, and first and second inner ball tracks 17, 19, forming first pairs of tracks 16, 17 which widen in a first axial direction Ri1 (?), and forming second pairs of tracks 18, 19 which widen in a second axial direction Ri2 (?). Balls 20 are guided in the pairs of tracks and have centers Z positioned on a pitch circle radius PCR around a joint centre M. A ball cage 21 holds the balls 20 in a common central plane E on to the angle-bisecting plane when the joint is articulated. There is provided an axial clearance permitting a relative axial displacement S wherein, when in the aligned condition, the ratio between the axial clearance S and the pitch circle radius PCR ranges between 0.01 and 0.09 (0.01<S/PCR<0.09).

Abstract: A ball-and-socket joint comprising an inner hub (1) and an outer hub (6) inside which tracks are disposed that are associated with each other in pairs. At least one ball is arranged in each track in order to transmit torque between the inner hub and the outer hub. The ball-and-socket joint further includes at least one diaphragm which seals the outer hub with respect to a joining element that can be connected in a torsion-proof manner to the inner hub. The outer hub is provided with a metallic interior element encompassing the tracks, a dampening element which embraces the interior element in at least some areas, and a cap that embraces the damping element in at least some areas in order to connect the outer hub to a driving part or a part to be driven. The damping element is made of a material having a modulus of elasticity lower than the modulus of elasticity of the metallic material of the interior element and/or the cap of the outer hub while being greater than the modulus of elasticity of the diaphragm.

Abstract: An ATV drive shaft which can be produced at low costs is provided. In a drive shaft installed in an uneven terrain traversing, mounted type vehicle and adapted to transmit drive power to wheels through constant velocity joints J1 and J2 on the inboard and outboard sides, a double offset type constant velocity joint J2 is used on the inboard side and an undercut free type constant velocity joint J1 is used on the outboard side, and the track clearances of the constant velocity joints J1 and J2 are in the range of 20 ?m-200 ?m.

Abstract: A constant velocity joint includes an outer race having a plurality of ball grooves formed in an inner spherical surface thereof, which ball grooves extend in a direction of a rotation axis of the outer race, an inner once having a plurality of ball grooves formed in an outer spherical surface thereof, which ball grooves extend in a direction of a rotation axis of the inner race and are paired with the ball grooves of the outer race, and a plurality of balls disposed between the ball grooves of the outer race and the ball grooves of the inner race. In the constant velicity joint, the ball grooves of at least one of the outer race and the inner race are partially formed with relief profiles to provide a plurality of relief groove portions such that a load applied to each of the balls located in the relief groove portions during torque transmission between the inner race and the outer race is smaller than a load applied to each of the balls located in the other portions of the ball grooves.

Abstract: The invention relates to a drive shaft, in particular a longitudinal shaft for a motor vehicle, comprising at least one hollow shaft cross-section and at least one homocinetic joint (1) whose external hub (3) is connected to the hollow shaft cross-section (8).

Abstract: An opposed path joint comprising an inner hub, which is provided with first inner grooves and second inner grooves, and comprising an outer hub, which is provided with first outer grooves and second outer grooves that respectively form a pair with the first and second inner grooves. The opposed path joint also comprises an annular cage, which is placed between the inner hub and the outer hub and which has a radial openings whose number corresponds to that of the groove pairs. Balls that engage inside the grooves are guided inside these radial openings. According to the invention, the outer hub of the opposed path joint is a single-piece closed ring, in which the outer grooves are formed without cutting. Alternatively, the outer hub has at least two elements that are located one behind the other on the outer hub axis and, together, center the cage.

Abstract: A constant velocity counter track joint (11) having an outer joint part with first outer ball tracks (18) and second outer ball tracks (20), an inner joint part with first inner ball tracks (19) and second inner ball tracks (21). A ball cage (16) is positioned between the outer joint part and the inner joint part with cage windows which each accommodate at least one of the balls. When the joint is in the aligned condition, the aperture angle (?1) of the pairs of first tracks opens in the central joint plane (E) from the aperture end to the attaching end of the outer joint part (12), and the aperture angle (?2) of the pairs of second tracks opens in the opposite direction. The central track lines (L18, L19) of the first pairs of tracks each have a turning point (T1-2), and the center angle (?) from the joint center to the turning point (T1-2), is greater than 4°.

Abstract: A constant-velocity fixed joint includes an outer joint part with ball raceways and an inner joint part with ball raceways which are separated by webs. A cage, which is disposed between the outer joint part and the inner joint part, has windows for holding balls. The inner joint part can be inserted into the cage only when at least one of its webs engages in a window in the cage. As a result of certain ratios of the raceway angle to the web angle, a high resistance to fracturing at large deflection angles is achieved and a weakening at the functional faces of the inner joint part is avoided. The large angle of wrap around the balls at the ends of the raceways is advantageous for the load bearing capacity of the raceways. Due to its simple form, the cage can be manufactured with a small thickness.

Abstract: An Rzeppa joint 1 comprises an inner hub 4, an outer hub 7 and a cage 5, which is guided between the two and which holds a number of balls 6 inside radial openings 8. The aim of the invention is to facilitate the assembly of the Rzeppa joint 1. To this end, the inner hub 4 is provided with a first element 10a, 10b and with a second element 11a, 11b that are located, in essence, one behind the other along the inner hub axis 4.

Abstract: A counter track joint having an outer joint part (10), inner joint part (20), a ball cage (30) and torque transmitting balls. First outer tracks and first inner tracks form first pairs of tracks which widen in a first direction, and second outer tracks and second inner tracks form second pairs of tracks which widen in an opposed second direction. The annular cage (30) includes four first and four second circumferentially distributed cage windows which each accommodate one of the balls and which hold the balls in one plane. The second outer ball tracks (12), at one end, include widened, non-contacting assembly portions (13) for inserting balls (32) into the second cage windows from the radial outside, with all the first cage windows already having balls, and with the second cage windows axially projecting from the outer joint part (10) as a result of the joint being over-articulated.

Abstract: A constant velocity universal joint includes: an outer joint part 10 having a plurality of track grooves 14 formed on its cylindrical inner circumferential surface 12 and extending in an axial direction; an inner joint part 20 having a plurality of track grooves 24 formed on its spherical outer circumferential surface 22 and extending in the axial direction; six torque transmitting balls 30, each being put in a ball track formed by a pair of the track groove 14 of the outer joint part 10 and the track groove 24 of the inner joint part 20; and a cage 40 having pockets 46 for retaining the torque transmitting balls 30. The center Oo of curvatures of the spherical outer circumferential surface 42 and the center Oi of the spherical inner circumferential surface 44 of the cage 40 are offset by the same distance in the opposite directions along the axis about the center of the joint O.

Abstract: A convoluted boot for constant velocity joints and a constant velocity joint lubricant for use in such a convoluted boot. An additive which is added to the constant velocity joint lubricant and/or to the convoluted boot material is provided. The additive comprises amide waxes and also may include hydrocarbon oils. Use is made, in particular, of monoamides and/or diamides of carboxylic acids with 8 to 50 carbon atoms to form, by diffusion, a lubricating film on the surface of a convoluted boot. Furthermore, oleic acid amide and/or ethylenediamine distearate result in a particularly early formation of a lubricating film on the outer boot surface and thus to a long-term prevention of noise.

Abstract: In a wheel hub module for motorized land vehicles, there is provided an arrangement comprising a hub module casing member, a hub subassembly composed of permanently joined pre-loaded co-rotating inboard and outboard members, inboard and outboard complements of bearing rolling elements and a constant velocity joint wherein the CV joint's outer race proper is the inboard wheel bearing's inner race, and wherein the respective inboard and outboard wheel bearing's raceways may be of identical or of mutually different geometric dimensions, and wherein the inboard wheel bearing provides full end support to the CV joint outer race itself, making for a simple, robust and compact hub module.

Abstract: A pair of spherical gears connects the intersecting shafts of a CV-joint. One gear has internal teeth, and the other has external teeth. The gear design is based on pitch circles that are great circles on theoretical pitch spheres that are concentric and have identical radii. The internal teeth are either conically or spherically shaped, while the external tooth faces are cylindrical with tangential flat extensions. The spherical gears are shown on half-shafts. The preferred embodiments have six teeth on each gear, and one preferred embodiment also uses balls for the internal teeth. The gears, while rotating at high speeds under load, can intersect throughout a continuous maximum range of 60° or more in any direction.

Abstract: A constant-velocity joint includes an outer ring formed with an annular space therein having an opening at one end thereof. The annular space is defined by a radially outer wall and a radially inner wall. One of the radially inner and outer walls is formed with three axially extending track grooves circumferentially spaced apart from each other by 120 degrees. A cage is inserted in the annular space with one end thereof protruding from the opening of the annular space. A second shaft is provided on the one end of the cage. Balls are retained by the cage and adapted to roll in the track grooves. At least one of the outer ring and the cage is formed of a synthetic resin.

Abstract: A fixed type constant velocity joint comprising an outer ring (1), an inner ring (2), torque transmitting balls (3), a cage (4), and a preloading mechanism in which either a pressing section for axially applying an elastic pressing force or a receiving section for receiving the pressing force from the pressing section is disposed in the cage (4), the other being disposed in the inner ring (2). The axial clearance between the inner ring (2) and the cage (4) is greater than the axial clearance which is due to the radial clearance of the track, and the axial clearance which is produced by the radial clearance of the track is 2.5-6.5 times as large as the radial clearance of the track. Further, the center of the outer spherical surface (2b) of the inner ring (2) is shifted to the spread side of the ball tracks (1a, 2a) over the center of the inner spherical surface (4b) of the cage, thereby improving the cross operation.

Abstract: A constant velocity joint 1 disposed on the outboard side of a drive axle for transmitting drive power to a wheel, comprising an outer joint member 2 having a plurality of track grooves 3 on the spherical inner peripheral surface 2a, an inner joint member 4 having a plurality of track grooves 5 on the spherical outer peripheral surface 4a, torque transmitting balls 6 disposed in a plurality of ball tracks formed by the opposed track grooves 3 and 5 of both joint members 2 and 4, and a cage 8 interposed between both joint members 2 and 4 and receiving and holding the torque transmitting balls 6 in pockets 7, wherein the outboard-side end of the cage 8 is formed with an opening 8x for removably inserting the inner joint member 4 and the inboard-side end is formed with an opening 8y whose diameter is smaller than that of the outboard-side opening 8x.

Abstract: The invention relates to a homokinetic displacement joint for longitudinal shafts of motor vehicles, consisting of an outer and inner joint body having ball raceways, a cage between the joint bodies, and balls provided in the individual pairs of ball raceways. The balls are guided in the cage and the ball raceways are provided in alternating sequence, alternately rising to the right and left, to form slanted, spatially arranged ball raceways in the assembled state of the joint bodies. The individual ball raceways possess a track slant angle ? 8 and an incline angle ?? 9 at are determined, relative to one another, by the ratio ?:??=5:3.

Abstract: A cross groove type constant velocity joint 10 comprises a cuplike outer race 11, an inner race 12, plural balls 13 and a cage 14. The outer race 11 has plural outer grooves 11a twisting about a rotational axis of the outer race 11 on its inner surface. The outer race 11 itself has plural restrictions 11b at the back of the outer grooves 11a to prevent the balls 13 from dropping out of the outer grooves 11a where the respective ball 13 is at the innermost end of the outer groove 11a.

Abstract: A constant velocity joint and a boot for a constant velocity joint are disclosed. The boot generally includes a first channel and a second channel. The first channel is in fluid communication with a joint chamber of the constant velocity joint. The first channel is also in communication with the second channel and generally allows airflow therethrough while resisting clogs from lubricant. Additionally, the second channel generally allows airflow therethrough to the atmosphere while resisting passage of foreign contaminants therethrough.

Abstract: A constant velocity joint (11) in the form of a counter track joint wherein, when the joint is in the aligned condition, the ratio (V1) of the pitch circle diameter (PCDS) of the shaft toothing in the inner joint part (15) in the power of three relative to the product of the ball diameter (DK) squared and pitch circle diameter (PCDB) of the balls (17) assumes a value ranging between 0.9 and 1.3.

Abstract: A constant velocity joint 10 comprises an outer race 12, an inner race 11, balls 14 and a cage 13. The outer race 12 has a partially spherical inner surface 12a provided with plural outer ball grooves 12b. The inner race 11 has a partially spherical outer surface 11 a provided with plural inner ball grooves 11b arranged to correspond to the outer ball grooves 12b. The balls 14 are interposed between the outer ball grooves 12b and the inner ball grooves 11b. The radial distance of the outer ball grooves 12b from the rotational axis of the outer race increases toward an opening end of the outer race 12 in a predetermined zone H, and a contact angle ? between each ball 14 and each outer ball groove 12b decreases toward the opening end of the outer race 12 in the predetermined zone H.

Abstract: A fixed type constant velocity universal joint having an outer joint member having eight arcuate guide grooves extending in the axial direction in an inner spherical surface, an inner joint member having eight arcuate guide grooves extending in the axial direction in an outer spherical surface. Eight balls are disposed between the guide grooves of the outer joint member and guide grooves of the inner joint member. A cage is interposed between the outer and inner joint members for retaining the balls. A center of the guide grooves of the outer joint member is offset from the center of the inner spherical surface, and the center of the guide grooves of the inner joint member is offset from the center of the outer spherical surface by an equal distance to opposite sides in the axial direction. A relation of 0.45?B/A?0.65 is established, where A represents the wall thickness of the cage, and B represents the radial displacement of balls at a maximum joint angle.

Abstract: A torque transfer device, such as a transfer case for a motor vehicle, having a constant velocity joint integrated therewith is disclosed. In one embodiment, the constant velocity joint includes an outer race rotatably mounted within the torque transfer device and an inner race positioned within the outer race and operatively connected to the outer race by one or more torque transmitting balls. The torque transfer device further includes a drive mechanism that is connected to the outer race of the constant velocity joint, wherein the drive mechanism transfers torque received from an input shaft to the outer race of the constant velocity joint such that the outer race drives the inner race. The torque transfer device further includes an output shaft that is rotatably connected to the inner race.

Abstract: A wheel bearing device having a unitized hub ring, double-row bearing and constant velocity universal joint with one of double-row inner raceways formed on the joint outer ring. An end portion of the joint outer ring is fitted to an outside periphery of the hub ring through serrated portions. The hub ring is plastically deformed and expanded from an inside diameter side toward an outside diameter side by pushing a steel ball into a through hole of the hub ring preventing play in the serrated portions by the diameter expansion. A surface-hardened layer is formed at least on a base portion of the wheel mounting flange.

Abstract: A high performance constant velocity universal joint is based on a body which encloses the constant velocity joint components and provides a smooth spherical outer surface. A one-piece semi-rigid plastic boot in the form of a truncated sphere has a smooth internal spherical surface sized to match the outer surface of the body. The plastic of the boot is sufficiently elastic to allow the boot to snap over the body, yet sufficiently resilient to snap the open end closed after the boot is snapped over the body to provide a substantial seal preventing entry of debris under the seal. A retaining ring is positioned on the boot near the truncated end to resist plastic creep which would result in enlarging the opening and allowing debris to enter the seal.

Abstract: A fixed constant velocity universal joint includes: an outer ring having a plurality of track grooves extending axially in its inner spherical surface; an inner ring having a plurality of track grooves extending axially in its outer spherical surface; torque transmission balls arranged in ball tracks formed by cooperation of the track grooves of the outer ring and the track grooves of the inner ring; and a cage having pockets for retaining the torque transmission balls. The center of the track grooves of the outer ring and the center of the track grooves of the inner ring are offset from the spherical center of the inner spherical surface and the spherical center of the outer spherical surface, respectively, by the same distance axially in opposite directions. An axial clearance between the pockets and the torque transmission balls is set within the range of ?0.006 and ?0.035 mm.

Abstract: A constant velocity joint is provided that includes an outer race having a bore with an inner surface, a cage arranged within the bore of the outer race, an inner race having an outer surface, a plurality of balls arranged within the cage, and a shaft connected to the inner race. The cage, outer race, inner race, and balls interrelate to center and support the cage. The cage remains in a non-supporting state with the outer race and the inner race through a no angle and a high angle position of the shaft.

Abstract: A fixed constant velocity joint is provided, which is suitable for an application where a rotational backlash should be avoided. A pressing member is attached to a shaft, and simultaneously a receiving member is attached to a cage. Then, an elastic force of an elastic member elastically bring a pressing part of the pressing member in contact with a receiving part of the receiving member. As a result, an inner race and a cage relatively travel in the axial direction, balls are pushed toward a direction along which wedge-shape ball tracks narrow, and consequently a track clearance in the axial direction decreases.

Abstract: A constant velocity joint has an outer part, an inner part, and a full cage that is accommodated in a self-holding manner between these parts. The cage is formed with windows for holding balls inside races on the outer part and on the inner part. The cage is guided around a common center of curvature via spherical outer surfaces on the outer part and via spherical inner surfaces on the inner part. During assembly, the outer part and the cage can be slid inside one another in the direction of their component axes. This permits a particularly compact design of constant velocity joints with Stuber offset. Special openings on the outer part enable the balls to be inserted when the inner part is already connected to a shaft.

Abstract: A fixed type constant velocity joint includes a cylindrical joint outer ring having an inner spherical surface formed with circumferentially equispaced axially extending track grooves, a joint inner ring having an outer spherical surface formed with circumferentially equispaced axially extending track grooves, balls disposed in ball tracks defined by cooperation between the track grooves in the joint outer and inner rings, and a cage for holding the balls in the ball tracks. The rear open end of the joint outer ring has an inner diameter larger than the outer diameter of the joint inner ring, an inner diameter surface of said cage is a surface having a shape such that the region located forwardly of the axial center is capable of controlling the forward movement of the joint inner ring while the region located rearwardly of the axial center is capable of allowing the axial movement of the joint inner ring.

Abstract: A fixed type constant velocity joint is disclosed in which the angle defined by a straight line connecting a contact point between a cage and an outer joint member and a contact point between the cage and an inner joint member, and the centerline of the cage is made not more than 10 degrees.

Abstract: A constant velocity joint includes an outer joint member, an inner joint member, torque transmitting ball assemblies guided in pairs of tracks, and a cage having windows for receiving the ball assemblies and cage webs defined between the windows. Each ball assembly comprises a slide shaft having lugs at the ends, a roller shaft rotatably and slidably disposed on the slide shaft, and a first and second annular sub-rollers rotatably disposed on the roller shaft. Each of cage webs includes web grooves formed radially at the circumferential faces, engaging the lugs of the slide shaft, thereby allowing a limited radial movement of the ball assembly relative to the cage window, and transmitting any axial force to and from the ball assembly. The ball assemblies reduce the friction loss and wear of constant velocity joints by providing the sub-rollers that roll independently on the inner or outer tracks.

Abstract: The contact angle of the ball 15 with each first guide track 21 of an inner joint member 12 is made to become smaller gradually from an opening portion side toward a bottom portion side, and the curvature radius for the first guide track 21 is made to become larger gradually from the opening portion side toward the bottom portion side. If the contact angle only were made to become smaller gradually from the opening portion side toward the bottom portion side, the contact angle would become too small thereby to cause chattering in rotation to be generated. If the curvature radius only were made to become larger gradually from the opening portion side toward the bottom portion side, a contact ellipse M2 defined by the ball 15 and the first guide track 21 would become tool small, which would cause the ball 15 to make dents on the surface of the first guide track 21.

Abstract: A constant velocity counter track joint having an outer joint part (12) and an inner joint part forming first and second pairs of tracks (22, 23; 24, 25) each accommodating a torque transmitting ball (14), and a ball cage (15) with windows (18) each receiving at least one of the balls (14). When the joint is aligned, the opening angle (?) of the first pairs of tracks (22, 23) opens from the aperture end to the attaching end, and the opening angle (?) of the second pairs of tracks (24, 25) opens from the attaching end to the aperture end. The first pairs of tracks (22, 23) are designed in such a way that, when the joint is articulated, the opening angle (?) of the first pairs of tracks (22, 23), at a ball (14) entering the outer joint part (12) via the central plane (EM), initially becomes zero and then opens towards the aperture end.

Abstract: A constant velocity universal joint has an outer joint member having eight curved track grooves axially extending along an inner circumferential surface, an inner joint member having eight curved track grooves axially extending along an outer circumferential surface, eight balls respectively arranged in eight ball tracks provided as pairs of the track grooves of the outer and inner joint members. The center of each track groove of the outer joint member is axially displaced a predetermined distance from the spherical center of the inner circumferential surface. The center of each track groove of the inner joint member is axially displaced the same distance from the spherical center of the outer circumferential surface in the direction opposite to that of the outer joint member. A PCD gap in the ball track is in the range of 5 ?m to 50 ?m.