Abstract: A tripot universal joint includes a first rotatable shaft member having a longitudinal axis and three longitudinal guide channels, each having two opposing concave side surfaces and a back surface. The joint also includes a rotatable second shaft member having a longitudinal axis and comprising a spider having three radially extending trunnions equally, each of the trunnions having a convex outer surface disposed within an associated longitudinal guide channel. The joint further includes three rotatable ball assemblies, each disposed on a convex outer surface of a trunnion, each ball assembly having an outer ball with a convex outer surface that is disposed within the concave side surfaces of the longitudinal guide channel with which it is associated for moveable engagement within the channel and an inner ball with an inner surface that is rotatably disposed on the convex surface of the trunnion with a detachably reattachable coupling.

Abstract: A tripot universal joint includes a first rotatable shaft member having a first longitudinal axis and three longitudinal guide channels disposed parallel to the first longitudinal axis, each having two opposing concave side surfaces and a back surface. The joint also includes a rotatable second shaft member having a second longitudinal axis and comprising a spider having three radially extending trunnions equally, each of the trunnions having a convex outer surface disposed within an associated longitudinal guide channel. The joint further includes three rotatable rollers, each rotatably disposed on a convex outer surface of a respective trunnion, each roller having a convex outer surface that is configured for disposition within the concave side surfaces of the longitudinal guide channel with which it is associated for moveable engagement within the channel and an inner surface that is rotatably disposed on the convex surface of the trunnion.

Abstract: A structure for a tripod constant velocity joint and a method of assembling a roller assembly maintains the structural stability of the tripod constant velocity joint, and minimizes the frictional force between a trunnion and a track, thus remarkably reducing the generation of axial force, therefore ensuring the stable operation and durability of the constant velocity joint. The structure for the tripod constant velocity joint includes an inner roller and an outer roller provided between a track of a housing and a trunnion of a spider. A roller groove is formed on a central portion of an outer surface of the outer roller in a circumferential direction of the outer roller. Further, a plurality of recesses is formed on a surface of the trunnion to reduce a contact area with the inner roller.

Abstract: A constant velocity joint (1) comprising: a male element (2) with multiple arms (4), a female element (8) having a central axis (X?-X?) and defining tracks (9A, 9B) which are symmetrical in relation to a radial longitudinal plane (P), and an outer roller (12) with a rolling surface (30). The tracks and the rolling surface define two contact points (Z1, Z2) therebetween. The tangent planes of the track and rolling surface coincide and are parallel to the plane (P) at not less than one contact point. The cross profiles of the tracks and rolling surface at not less than one contact point are rectilinear or convex.

Abstract: An intermediate member is rockably provided around an outer periphery of a corresponding one of tripod shaft portions. Shaft-like rolling elements are retained by corresponding retainers so that the shaft-like rolling elements are able to circulate around the corresponding intermediate members and are able to roll between side surfaces of a corresponding one of raceway grooves of an outer ring and a torque transmitting surface of a corresponding one of the intermediate members. Then, raceway recesses are formed on the side surfaces of each raceway groove so as to extend in a direction of a rotation axis of the outer ring. The shaft-like rolling elements are fitted in the corresponding raceway recesses and are able to roll along bottom surfaces of the respective raceway recesses. Thus, the retainers are arranged outside the raceway recesses.

Abstract: Tripod roller for a constant velocity joint in a tripod construction having an interior ring, an exterior ring, and roller bodies arranged therebetween, whereby provided on the interior and on the exterior ring are two mutually opposing annular shoulders that limit the axial movement of the roller bodies in one direction. One of the rings has another annular shoulder for limiting the axial movement of the roller bodies in the other direction, while other ring is axially extended and has a circumferential annular groove in which is received a radially projecting locking ring that laterally overlaps the one ring.

Abstract: A tripod constant velocity universal joint includes among others an inner joint member having a boss 22 and journals 24 radially protruding from the boss, a radius of curvature R1 as viewed in a cross section of a journal bottom part 23 connecting the boss 22 to the journal 24 and as measured at opposing locations in a circumferential direction of the joint is larger than a radius of curvature R2 of the journal bottom part as viewed in its cross section and as measured at opposing locations in an axial direction of the joint and R1 gradually decreases down to R2.

Abstract: In a tripod type constant velocity joint, in order to produce a recovery couple to correct the inclination of the rolling direction of a roller and to reduce surface pressure without using angular contact provided by a Gothic arch-shaped roller guide surface, it is arranged that where r1 and r2 are the minimum and maximum values, respectively, of the radius of curvature of the generatrix for the outer peripheral surface of the roller within the range where solid contact is effected by elastic deformation of the contact section between the roller and the roller guide surface under a predetermined torque load with respect to the radius of curvature of the roller guide surface, the radius of curvature (r) of the generatrix be set in the range r1?r?r2.

Abstract: A constant velocity joint may include a roller including a roller body and a bearing receiving portion formed on one lateral side of the roller body, wherein the roller is guided and moved on a track of the constant velocity joint, and a bearing mounted in the bearing receiving portion and a portion of which protrudes outside the one lateral side of the roller in rotation axis direction of the roller, wherein the bearing is guided and moved in the bearing receiving portion of the roller.

Abstract: A constant velocity joint, where the tilt angle of a first trunnion relative to a plane crossing perpendicularly to the axis of a second shaft is set to be different from the tilt angle of a second trunnion and the tilt angle of a third trunnion. The tilt angle of the second trunnion and the tilt angle of the third trunnion are set to be equal to or different from each other, and three axes of the first to third trunnions are set to be included on a same plane.

Abstract: A tripod type constant velocity joint including a hollow cylindrical housing fixed to the end of a first rotary shaft and formed with axially extending recessed grooves opened at one axial end and located at circumferentially trisectional positions on the inner peripheral surface, a tripod consisting of a boss fixed to the end of a second rotary shaft, and end-spherical trunnion journals radially projecting from circumferentially trisectional positions on the boss, and roller assemblies each consisting of an inner roller swingably fitted at the inner peripheral surface thereof on the spherical outer peripheral surface of the trunnion journal, and an outer roller supported for rotation and axial movement on the outer peripheral surface of the inner roller through needle rollers, wherein the outer rollers are received in the recessed grooves in the housing and are rollable axially of the housing.

Abstract: A needle bearing functioning as a rolling element comprises a uniform-diameter body part and bottom surfaces shaped in flat surfaces. A tapered reduced-diameter part and a chamfered part are interposed between the body part and the bottom surface. A gentle reduction in diameter is first made by the tapered reduced-diameter part, and then a relatively sharp reduction in diameter is made by the chamfered part. Consequently, in the needle bearings adjacent to each other, their tapered reduced-diameter parts are separated from each other.

Abstract: A tripod type constant velocity universal joint that includes an outer joint member having three track grooves axially extending on an inner circumferential surface thereof; an inner joint member having three radially projecting trunnions; a boot fitted to an outer periphery of the outer joint member at an end portion and to a shaft extended from the inner joint member at another end portion to seal an inner region of the joint; wherein the outer joint member includes a first reduced-thickness portion on an outer periphery thereof in a region corresponding to the region between the track grooves, and a second reduced-thickness portion on an outer periphery thereof in a region corresponding to the region where the track grooves are located; and wherein the second reduced-thickness portion is of a groove shape axially extending with respect to the outer joint member.

Abstract: A sliding-type tripod-shaped constant-velocity universal joint that can reduce induced thrust force by preventing the tangent-point back-surface side of rollers from contacting with roller grooves in the case where the rollers and the roller grooves make an angular contact at two locations. An outer peripheral surface of the rollers makes an angular contact with respect to the roller grooves at two locations, and an inner peripheral surface of the rollers is formed as a convex-shaped curve that is directed to the inner side in an axially cross section of the rollers. And, the rollers are made swingable with respect to tripod-shaft portions.

Abstract: A pod type universal joint is disclosed in which a roller assembly (30) is rotatably carried by each trunnion journal (26), the roller assembly (30) comprising a spherical roller (32) having its outer peripheral surface of a true sphere-shape and needle rollers (34) arrayed between the spherical roller (32) and each of the trunnion journal (26), a raceway (28) for the needle rollers (34) and flanges (28a and 28b) for restricting an axial movement of the needle rollers (34) being formed on an outer periphery of each of the trunnion journals (26), a projection (38C) beyond the circumscribing circle of the needle rollers (34) being provided on the outer periphery of the tip end of each of the trunnion journals (26) by performing plastic working on the tip end surface of each of the trunnion journals (26).

Abstract: The disclosure relates to a homokinetic joint that comprises a male member with several arms, a female member for receiving the male member, a roller mounted and freely rotating on each arm, a spring provided between the male member and the female member and for urging the male member away from the female member, and a cup provided between the spring and the male member. The cup includes a skirt comprising an outer surface designed to contact at least one of the rollers when the joint is in the separated state.

Abstract: A tripod constant velocity universal joint including an outer joint member having axially extending track grooves formed at three circumferentially equispaced positions in the inner periphery. A tripod member having a trunnion barrel adapted to be fitted to a shaft for torque transmission and trunnion journals radially projecting from three circumferentially equispaced positions in the trunnion barrel. Rollers respectively attached to the trunnion journals for rotation through a plurality of needle rollers and received in the track grooves. Each roller is guided at its outer peripheral surface by roller guide surfaces formed in opposite lateral walls of the track groove. A skew angle of the needle rollers is controlled so that it is within a predetermined specified value.

Abstract: An annular member is installed on a circular cylinder section of a trunnion, and a roller member, in the inner periphery of which a needle bearing is held, is installed on the circular cylinder section. The needle bearing is held between a flange section formed on one end of the roller member and the annular member installed on the trunnion with a predetermined gap between them. Further, a gap (X) between the needle bearing and the annular member is set to satisfy the following relationship. X>R/2·(1/cos ? max?1) where R: Radius of rotation of the center of the roller member relative to the center axis of an outer member. ? max: Maximum inclination angle of an inner member.

Abstract: A compact tripod type constant velocity joint with double roller type roller units capable of preventing plastic deformation of snap rings in assembling. In each of the roller units, an outer roller has an inner diameter ‘Do’ of 26.4 mm or less. The inner diameter ‘Do’ (mm) of the outer roller, a groove depth ‘Depth’ (mm) of engaging grooves formed on the outer roller and an outer diameter ‘Ds’ (mm) of the snap rings satisfy the formula below. Then, in a state where the snap rings are seated in the engaging grooves, diametrical gaps of 0.1 mm or more are formed between outer peripheral ends of the snap rings and groove bottoms of the engaging groove. Do+2×Depth?Ds?0.1.

Abstract: A constant velocity joint for a drive system with a first rotating shaft and a second rotating shaft, comprises: a hollow housing having a plurality of guide grooves therein, the guide grooves extending in an axial direction of the housing and spaced equally apart in a circumferential direction of the housing; a tripod having a plurality of trunnions, each trunnion positioned in a corresponding one of the guide grooves of the hollow housing; and a roller assembly disposed on each trunnion, the roller assembly including an outer roller for rollably receiving in the corresponding guide groove; wherein the outer roller includes a convex outer surface, the convex outer surface having a first radius (Rry) seen from a cross section taken in an orthogonal direction relative to a central axis of the outer roller, the convex outer surface having a second radius (Rrx) seen from a cross section taken along the central axis of the outer roller, a center of the second radius (Rrx) displaced outwardly from a center of the

Abstract: A shaft assembly comprises a tubular shaft and a joint, wherein at least a portion of the joint is disposed within the tubular shaft. The present invention may also include a shaft assembly comprising a shaft and a constant velocity joint wherein the constant velocity joint is integrated into the shaft by inserting at least a portion of the constant velocity joint into the shaft. In one method of the invention, the method comprises the steps of integrating a constant velocity joint into a propeller shaft by inserting at least a portion of the constant velocity joint into the propeller shaft.

Abstract: A transmission joint consists of two drive shafts connected by an articulated mechanical connection. This connection is protected by an elastic socket, such as a sealing bellows, connecting the shafts. One end of this socket is multilobed to cover upon contact a multilobed element of the articulated mechanical connection and works with a tightening element of the collar type that surrounds the multilobed end of the socket. The multilobed end of the protective socket has, to the right of the zones of greater thickness of the multilobed wall, a reinforcement of the thickness to obtain an external radial bulge of the wall of the socket, at least when mounted on the multilobed connection element. The bulge works with the collar type tightening element to balance the tightening forces between the thin and reinforced portions of the multilobed wall.

Abstract: A constant velocity joint, wherein all rolling elements annularly held by a tool are inserted into an inner diameter part from one end opposite to the flange part of a roller member along the axis of the inner diameter part of the roller member or the rolling elements remaining after one rolling element is removed from all rolling elements are charged into the inner diameter part and the removed one rolling element is inserted into a clearance between the rolling elements from the other end along the axis of the inner diameter part. After all rolling elements are fitted into the inner diameter part of the rolling member, a snap ring is fitted into an annular groove formed at the end part of the inner diameter part on the opposite side of the flange part to hold the rolling elements between the flange part and the snap ring.

Abstract: In a universal joint boot including a bellows part, a ring-shaped mounting part that is formed at one end of the bellows part and into which a cup for receiving one member of two members moving relatively to each other is inserted; and a seal that is formed toward the peripheral direction of the inner peripheral surface of the mounting part to which the cup is mounted, the inner peripheral surface has protrusions protruding toward the axial center of the ring-shaped mounting part and the height of the seal lip becomes lower from the bottom of the protrusion to a peak and width of the seal lip becomes wider from the bottom of the protrusion to the peak, whereby sealing performance can be improved.

Abstract: A constant velocity universal joint is provided, having a hollow outer joint member, an inner joint member, an outer roller including a cylindrical surface, an inner roller including a concave sphere, and plural leg shafts each including a convex sphere formed in a tip portion and engaging with the concave sphere, where the cylindrical surface of the outer roller satisfies the following: W1>PCR (1?cos ?)/2+?3R3+?2R1 W2>3PCR (1?cos ?)/2??3R3+?2R1, where W1 indicates a length of the cylindrical surface from a center of the leg shaft and an intersection of the cylindrical surface and an upper side taper portion of the outer roller, W2 indicates a length of the cylindrical surface from the center of the leg shaft and an intersection of the cylindrical surface and a lower side taper portion of the outer roller, and ? indicates a maximum joint angle.

Abstract: In a tripod-type constant velocity joint having an inner joint member, an outer joint member, and three roller units, the radius R1, outer width W1, and inner width W2 of the outer periphery cylindrical surface of each roller unit, and the radius R3 of the center hole of each roller unit satisfy the inequalities: 0.5Rtc(1/cos 0.3??1)+(R1?R3)?<W1 and 1.5Rtc(1?cos 0.3?)+(R1?R3)?<W2, where Rtc: the radius of a circle passing through the respective centers of tripod spherical surfaces of the inner joint member, ?: the maximum joint angle between the outer joint member and the inner joint member, and ?: coefficient of friction between each tripod spherical surface and the wall surface of the center hole of the corresponding roller unit.

Abstract: A constant velocity joint for a drive system with a first rotating shaft and a second rotating shaft, comprises: a hollow housing having a plurality of guide grooves therein, the guide grooves extending in an axial direction of the housing and spaced equally apart in a circumferential direction of the housing; a tripod having a plurality of trunnions, each trunnion positioned in a corresponding one of the guide grooves of the hollow housing; and, a roller assembly including an inner roller, the inner roller having a spherical inner face for receiving a corresponding one of the trunnions therein, and an outer roller mounted on an outer face of each inner roller, the roller assembly for transmitting a load between the first and second rotating shafts to drive the driving system.

Abstract: A constant velocity joint comprises an outer race, inner race and torque transmitting elements. The outer race has a cylindrical hollow part with an opening at one end and plural walls on an inner surface of the cylindrical hollow part. At the opening of the cylindrical hollow part, the walls have projections formed by a pin-drive. The inner race is assembled with the torque transmitting elements and press-fitted into the cylindrical hollow part of the outer race.

Abstract: A constant velocity universal joint is provided, having a hollow outer joint member, an inner joint member, an outer roller including a cylindrical surface, an inner roller including a concave sphere, and plural leg shafts each including a convex sphere formed in a tip portion and engaging with the concave sphere, where the cylindrical surface of the outer roller satisfies the following: W1>PCR(1?cos ?)/2+?3R3+?2R1 W2>3PCR(1?cos ?)/2??3R3+?2R1, where W1 indicates a length of the cylindrical surface from a center of the leg shaft and an intersection of the cylindrical surface and an upper side taper portion of the outer roller, W2 indicates a length of the cylindrical surface from the center of the leg shaft and an intersection of the cylindrical surface and a lower side taper portion of the outer roller, and ? indicates a maximum joint angle.

Abstract: A joint assembly has a pair of constant velocity universal joints and a connecting drive shaft. A cover unit protects the constant velocity universal joints and prevents hanging down of the joints under their own weight. The unit cover is arranged to cover the outer circumferential surfaces of the pair of constant velocity universal joints and boots. The unit cover is formed from elastomer material by injection molding. The cover unit inner circumferential surface has a configuration corresponding to the outline configurations of the pair of constant velocity universal joints and the boots.

Abstract: This homokinetic joint includes a roller assembly (9) having an inner ring (10) with a ring end surface (16) which is directed in a direction (S1), an outer roller (11) having a roller end surface (32) which is directed in the direction (S1), a needle ring (12), and a mechanism (13) for axially retaining the needle ring (12) on the inner ring (10). The ring end surface (16) is axially offset relative to the roller end surface (32) in the direction (S1).

Abstract: The present invention provides a lightweight, compact, and low-cost tripod type constant velocity universal joint while maintaining strength of overall tripod type constant velocity universal joint. The dimensional ratio of each component of the tripod type constant velocity universal joint is set as follows: 0.80<Dor<0.90, 0.105<Tor<0.115, 0.025<fir<0.045, 0.025<t2r<0.075, 0.53<Dir<0.63, 0.065<Tir<0.085, 0.32<Dj1r<0.42, and 0.32<Dj2r<0.35. In this event, the subscript “r” means that each dimension is divided by the trunnion journal pitch circle diameter D (=PCD) of the joint.

Abstract: A constant velocity joint, wherein all of those rolling elements excluding a plurality of rolling elements are divided into a plurality of rolling element groups and arranged along the inner diameter part of a roller member. The excluded plurality of rolling elements are dispersed in first to third cam grooves at intervals in the circumferential direction. When the rolling elements are pressed in the radial outer direction by the first to third pressing faces of a cam rotating in the arrow A direction, they are simultaneously press-fitted into first to third clearances between the rolling elements from the side of the inner diameter part of the roller member.

Abstract: A constant velocity universal unit includes an outer joint member whose inner peripheral face is formed with three guide grooves, an inner joint member including three tripod shafts each formed with a tripod spherical face, three roller units each including an outer peripheral face and an inner peripheral face coaxially formed with each other. The guide groove includes a pair of strip-shaped inner side faces formed with a pair of guide projections having a substantially half arc shape in cross section whose diameter is smaller than a height of the inner side face of the guide groove. The constant velocity universal joint further includes an annular recess formed on a substantially center portion in a height direction of the outer peripheral face of the roller unit and engaging with the pair of guide projections in a rolling manner and rotatable relative to a central axis of the guide projection.

Abstract: A constant velocity joint for a drive system with a first rotating shaft and a second rotating shaft, comprises: a hollow housing having an open end and a closed end and fixed to the first rotating shaft, an inner face of the housing including a plurality of guide grooves extending in an axial direction and spaced equally apart in a circumferential direction of the housing; and a tripod disposed at an end of the second rotating shaft, having a plurality of trunnions each positioned in a corresponding one of the guide grooves and being spaced equally apart in a circumferential direction of and at an angle normal to the second rotating shaft; and, an inner roller mounted to an outer end portion of each of the trunnions, an outer roller mounted on an outer face of each inner roller with needle rollers engaged between the inner and outer rollers, and allowing the outer face of each outer roller to roll and move in the corresponding one of the guide grooves and for transmitting a load between the first and second

Abstract: A constant velocity joint for a drive system having a first rotating shaft and a second rotating shaft coupled with the constant velocity joint, wherein the constant velocity joint comprises: a hollow housing having an opening at one end, and a closing at its opposite end fixed to an end of the first rotating shaft, an inner face of the housing including a plurality of guide grooves extending in an axial direction of the housing and spaced equally apart in a circumferential direction of the housing, each groove having a pair of side faces opposing to each other; and a tripod disposed at an end of the second rotating shaft, having a plurality of trunnions each positioned in a corresponding one of the guide grooves and being spaced equally apart in a circumferential direction of and at an angle normal to the second rotating shaft; and, an inner roller mounted to an outer end portion of each of the trunnions, an outer roller mounted on an outer face of each inner roller with needle rollers engaged between the in

Abstract: The universal joint includes an outer joint member having a rotational axis and three guide grooves extending parallel to its rotational axis. The three guide grooves are equally circumferentially spaced about the axis and each has opposed side portions. The universal joint also includes an inner joint member disposed inside the outer member. The inner joint member has a rotational axis and three arms equally spaced about this rotational axis extending radially into the guide grooves of the outer joint member. Each aim carries a roller having an external surface which engages the opposed side portions of the guide groove into which the arm extends. The roller is constrained to roll along the guide groove and each roller being able to rotate about, move lengthwise of, and tilt relative to the arm by which it is carried.

Abstract: A tripod type constant velocity universal joint that includes an outer joint member having three track grooves axially extending on an inner circumferential surface thereof; an inner joint member having three radially projecting trunnions; a boot fitted to an outer periphery of the outer joint member at an end portion and to a shaft extended from the inner joint member at another end portion to seal an inner region of the joint; wherein the outer joint member includes a first reduced-thickness portion on an outer periphery thereof in a region corresponding to the region between the track grooves, and a second reduced-thickness portion on an outer periphery thereof in a region corresponding to the region where the track grooves are located; and wherein the second reduced-thickness portion is of a groove shape axially extending with respect to the outer joint member.

Abstract: A ball assembly (118) for a tripot-style joint includes an annular outer ball (124) having a central axis (L) extending therethrough and a depression (182) formed therein. A plurality of needle rollers (122) is positioned along an interior of the outer ball (124). A needle roller retainer (140) is provided for retaining the needle rollers (122) within the outer ball (124) during operation of the ball assembly (118). The retainer (140) has a base portion (142) axially opposed to an end portion (121) of the needle roller (122), and a flange portion (144) extending from the base portion (142) into the depression (182), the flange portion (144) of the retainer (140) being resiliently pivotable within the depression (182) in response to application of an axial load to the retainer (140). In a particular embodiment, an inner ball (120) is positioned in the interior of the outer ball (124f), and a series of resilient tabs (148f) extends from the base portion (142f) of the retainer (140f).

Abstract: A tripod type constant velocity joint comprising a hollow cylindrical housing fixed to the end of a first rotary shaft and formed at the inner peripheral surface thereof with axially extending recessed grooves opened at one axial end and located at circumferentially trisectional positions on the inner peripheral surface, a tripod consisting of a boss fixed to the end of a second rotary shaft, and end-spherical trunnion journals radially projecting from circumferentially trisectional positions on the boss, a roller assemblies each consisting of an inner roller swingably fitted at the inner peripheral surface thereof on the spherical outer peripheral surface of the trunnion journal, and an outer roller supported for rotation and axial movement on the outer peripheral surface of the inner roller through needle rollers, wherein the outer rollers are received in the recessed grooves in the housing and are rollable axially of the housing, each recessed groove consists of guide surfaces contacting the outer peripher

Abstract: An apparatus and a method for manufacturing an outer ring member for a constant velocity joint and an intermediate molded body. The apparatus includes a molding land formed in circular arc shape in cross section with a prescribed radius of curvature, a relief part continued with the molding land part, and a correcting land part continued with the relief part and larger than the outer diameter of the relief part formed at one end outer peripheral surface of a second punch for forming a hole in a shaft part drawn by a shaft part molding part. The entire part of the molding land part of the second punch is formed to be positioned between the upper end F1 and the lower end F2 of the shaft part molding part in the vertical direction of the through hole of a lower die.

Abstract: A tripod constant-velocity universal joint has three guide grooves extending axially along an outer cup, trunnions projecting from a spider inserted into the outer cup, and rollers rotatably mounted on the trunnions through rolling elements. The rollers rotate and slide against guide surfaces of the guide grooves. The rolling elements have flat end faces and are assembled into the rollers by a keystone process. The rollers have flanges for preventing dislodgement of the rolling elements from the rollers. If a distance X by which a rolling element moves radially is maximum, the ratio (W/Dn) of the width W of contact between inner side surfaces of the flanges to the diameter Dn of the rolling element is in a range of from 0% to 30%, and the height h of the flanges also is set to satisfy the ratio value (W/Dn).

Abstract: A tripod type constant velocity joint comprising a hollow cylindrical housing fixed to the end of a first rotary shaft and formed at the inner peripheral surface thereof with axially extending recessed grooves opened at one axial end and located at circumferentially trisectional positions on the inner peripheral surface, a tripod consisting of a boss fixed to the end of a second rotary shaft, and end-spherical trunnion journals radially projecting from circumferentially trisectional positions on the boss, a roller assemblies each consisting of an inner roller swingably fitted at the inner peripheral surface thereof on the spherical outer peripheral surface of the trunnion journal, and an outer roller supported for rotation and axial movement on the outer peripheral surface of the inner roller through needle rollers, wherein the outer rollers are received in the recessed grooves in the housing and are rollable axially of the housing, each recessed groove consists of guide surfaces contacting the outer peripher

Abstract: The tripod member has three trunnions which are projected radially. Each of the trunnions carries a roller, and this roller is accommodated in one of the track grooves in the outer joint member. The outer peripheries of the rollers and the roller guideways make angular contact with each other. Support rings are fitted onto the outer peripheries of the trunnions. These support rings and the rollers are assembled (unitized) via a plurality of needle rollers to constitute roller assemblies capable of relative rotations. In longitudinal sections, the outer peripheries of the trunnions have straight shapes parallel to the axes of the trunnions. In cross sections, the outer peripheries are elliptic in shape, with their respective major axes perpendicular to the axis of the joint. The inner peripheries of the support rings have arcuate convex sections.

Abstract: A torsional vibration damper has two mutually pivoted masses and a friction device that is active between the masses. This friction device can include a first friction device that is a spring friction device and an auxiliary friction device comprising at least one entraining wedge. The entraining wedge can function as a dual wedge having at least two frictional surfaces for contacting at least one of the two mutually pivoted masses. There can also be at least one additional entraining wedge disposed parallel to the at least one entraining wedge inside of a chamber formed between the two mutually pivoted masses. The friction device and the auxiliary friction device frictionally couple the two mutually pivoted masses together.

Abstract: The tripod member has three trunnions which are projected radially. Each of the trunnions carries a roller, and this roller is accommodated in one of the track grooves in the outer joint member. The outer peripheries of the rollers and the roller guideways make angular contact with each other. Support rings are fitted onto the outer peripheries of the trunnions. These support rings and the rollers are assembled (unitized) via a plurality of needle rollers to constitute roller assemblies capable of relative rotations. In longitudinal sections, the outer peripheries of the trunnions have straight shapes parallel to the axes of the trunnions. In cross sections, the outer peripheries are elliptic in shape, with their respective major axes perpendicular to the axis of the joint. The inner peripheries of the support rings have arcuate convex sections.

Abstract: A tripod type constant-velocity joint includes an outer ring formed with three axially extending track grooves circumferentially spaced apart from each other by 120 degrees. Each track groove has a pair of opposed, axially extending side faces. A tripod member is inserted in the outer ring. The tripod member includes three protrusions each slidably received in one of the track grooves and having a pair of circumferentially curved side faces each opposing one of the pair of side faces of each track groove. Torque is thus transmitted between the outer ring and the tripod member. At least the protrusions of the tripod member are formed of a synthetic resin.

Abstract: To provide a constant velocity universal joint having a high resistance to cracking, a high dimensional stability and an excellent rolling fatigue life, the constant velocity universal joint includes an outer coupling member (5), an inner coupling member such as a tripod member (2), and a drive transmitting member such as rollers (7) operatively interposed between the outer and inner coupling members (5 and 2). At least one of the outer coupling member (5), the tripod member (2) and the rollers (7) has a carbonitrided layer and, at the same time, an austenite grain size is greater than the grade of No. 10.

Abstract: Disclosed herein are a structure for a tripod constant velocity joint and a method of assembling a roller assembly, which maintain the structural stability of the tripod constant velocity joint, and minimize the frictional force between a trunnion and a track, thus remarkably reducing the generation of axial force, therefore ensuring the stable operation and durability of the constant velocity joint. The structure for the tripod constant velocity joint includes an inner roller and an outer roller provided between a track of a housing and a trunnion of a spider. A roller groove is formed on a central portion of an outer surface of the outer roller in a circumferential direction of the outer roller. Further, a plurality of recesses is formed on a surface of the trunnion to reduce a contact area with the inner roller.

Abstract: A telescopic tripot universal joint comprises an outer drive member having three longitudinal drive channels which include two opposing concave side surfaces, an inner drive member having three radial trunnions having a radially outward facing semi-spherical surface for tiltably mounting a drive ball assembly which has a bearing train disposed radially between an inner ball tiltably engaged to the trunnion and an outer ball having a tread face which directly opposes the concave side surfaces of the drive channels. The ball assembly being free to wobble about a Z-axis wherein the assembly pivots about an X-axis disposed laterally to the outer drive member and pivots about a Y-axis disposed longitudinally to the outer drive member. The channel carries a guide rail which extends longitudinally lengthwise to the channel and projects radially inward in order to contact the outer ball when the ball assembly pivots about the X-axis, i.e., tilts relative to the axis of the outer drive member.