Abstract: An inner member of a constant velocity joint includes holding portions that hold roller assemblies. Each of the holding portions includes a first orthogonal part and a second orthogonal part brought into contact with an inner roller of the roller assembly. When first and second transmission shafts are coaxially disposed, top parts of the first and second orthogonal parts are brought into contact with the inner circumferential wall of the inner roller. The first and second orthogonal parts are each sectioned into a first curved surface extending from the proximal end of the holding portion to the top part and a second curved surface extending from the top part to the distal end of the holding portion. The curvature radius of the second curved surfaces is larger than the curvature radius of the first curved surfaces.

Abstract: A tripot housing and method of manufacture thereof. The tripot housing includes a housing body extending along an axis between a first end having an end wall and an open second end. A drive shaft extends from the end wall along the axis away from the second end. The housing body has an outer surface and an inner surface. The inner surface defines a guide channel that extends between the first end and the second end. The outer surface has a first region extending axially along a direction from the first end toward the second end to a shoulder that extends radially outwardly from the first region. The outer surface has a second region extending axially from the shoulder toward the second end. A ring has an inner surface disposed in an interference fit on first region and an outer surface extending radially outwardly from the second region.

Abstract: A tripot housing includes a housing body that extends between a first housing end and a second housing end along a longitudinal central axis. The housing body defines a guide channel that extends from the first housing end toward the second housing end. The guide channel has a first wall, a second wall, and a third wall that extends between the first wall and the second wall. An elliptical contact surface area transitions the first wall with the third wall and the second wall with the third wall, with the elliptical contact surface areas being configured for engagement with an outer roller of a roller assembly to inhibit a locking condition.

Abstract: A tripod constant-velocity joint including: an inner ring; three trunnions protruding from the inner ring; three roller units supported by the trunnions; and an outer ring storing the roller units. Each roller unit includes: an inner roller that is in contact with a convex outer-circumferential surface of the corresponding trunnion at a tangent point; an outer roller supported by the inner roller through rolling elements that are interposed between the inner and outer rollers; and a limiting portion protruding from the outer roller, so as to limit movements of the rolling elements and the inner roller. A clearance between the inner roller and the limiting portion is smaller than an axial length of a crowned end portion of each rolling element, and is larger than a stroke distance of reciprocating movement of the tangent point when a joint angle of the tripod constant-velocity joint is a predetermined value.

Abstract: A tripod constant-velocity joint including: an inner ring; three trunnions protruding from the inner ring; three roller units supported by the trunnions; and an outer ring storing the roller units. Each roller unit includes: an inner roller that is in contact with a convex outer-circumferential surface of the corresponding trunnion at a tangent point; an outer roller supported by the inner roller through rolling elements that are interposed between the inner and outer rollers; and a limiting portion protruding from the outer roller, so as to limit movements of the rolling elements and the inner roller. A clearance between the inner roller and the limiting portion is smaller than an axial length of a crowned end portion of each rolling element, and is larger than a stroke distance of reciprocating movement of the tangent point when a joint angle of the tripod constant-velocity joint is a predetermined value.

Abstract: A constant velocity joint includes a trunnion extending radially outwardly about a trunnion axis. The joint also includes a ball surrounding the trunnion and rotatable relative thereto about a plurality of needle rollers. The joint further includes a retainer that is a single, unitary structure coupled to the trunnion and positioned to limit movement of the ball and the needle rollers in a direction parallel to the trunnion axis.

Abstract: In a lateral cross section passing through a center of a trunnion in the form of a retaining member that constitutes part of a constant velocity joint, and an orthogonal site where a virtual tangent line at a contact region is perpendicular to a longitudinal direction of a guide groove, a curved surface having a first arcuate portion and a second arcuate portion is formed. The second arcuate portion is contiguous with the first arcuate portion, and has a smaller radius of curvature than the first arcuate portion. Further, the first arcuate portion and the second arcuate portion are arranged in this order from a side in proximity to an annular member of the trunnion.

Abstract: An angle-adjustable tripod universal joint which has one tripod, three rollers and one universal joint outer part. An inner wall of the universal joint outer part has three roller tracks, and one roller is disposed in each of the roller tracks and rolls along the roller track. The inner cavity of each roller has a rotatably disposed spherical shaft head of the tripod. The inner wall of each roller track has a guiding groove. The peripheral shape of each roller is cylindrical. The bottom surface of the guiding groove is a plane surface, and two side surfaces of the guiding groove are flat surfaces perpendicular to the plane surface. The peripheral surface of each roller is partially inserted into the corresponding guiding groove, and the peripheral surface of the roller is tangent to the corresponding plane surface.

Abstract: In a preferred embodiment, there is provided an adjustable roller bracket assembly for a belt conveyor system, and which comprises a first end portion, a second end portion, and an adjustment mechanism connecting the first and second end portions, the first end portion being for attachment to a system frame, the second end portion being for rotatably engaging a roller at an axial end thereof, and the adjustment mechanism being operable to permit selective movement of the second end portion relative to the first end portion against frictional resistance therebetween to effect adjustment of a rotational axis of the roller.

Abstract: A tripod constant-velocity joint includes: an outer joint member having a cavity elongated in a longitudinal direction and three roller tracks; an inner joint member having a center body and three journals outwardly radially protruded from the center body; and three roller assemblies respectively coupled to the journal in a state of being respectively disposed in the roller tracks. The respective roller assembly comprises: an inner race which is connected to the journal and is provided with a first inner ball groove and a second inner ball groove on both lateral sides thereof; a first ball array and a second ball array respectively having a plurality of balls which are respectively disposed in the first inner ball groove and in the second inner ball groove; and a ball cage which restricts movements of the first ball array and the second ball array in a longitudinal direction thereof.

Abstract: Provided is a tripod type constant velocity universal joint (1), including: an outer joint member (2) having track grooves (6) formed at trisected positions in a circumferential direction to extend in an axial direction; a tripod member (3) including leg shafts (9) radially projecting from trisected positions in the circumferential direction; and rollers (4) fitted in a freely rotatable manner about the leg shafts (9), respectively, and received in the track grooves (6), respectively, in which a radially outer surface (4a) of each of the rollers (4) is formed of a surface unsubjected to grinding or cutting work after heat treatment.

Abstract: A tripod type constant velocity universal joint includes an outer joint member having track grooves, a tripod member including trunnion journals, and spherical rollers each fitted in a rotatable manner about each of the trunnion journals through intermediation of a plurality of needle rollers. A corner portion is formed at a root portion of each of the trunnion journals so as to restrict movement of the plurality of needle rollers in the axial direction toward the root portion of each of the trunnion journals by interference between an end surface corner rounded portion of each of the plurality of needle rollers and the corner portion at the root portion.

Abstract: A first constant velocity joint is equipped with a cup part made of a light alloy. First ball grooves that receive a torque from torque transmitting members are formed on an inner wall of the cup part. A high hardness layer made of ceramic or cermet as a principal component thereof is formed on an inner surface of the cup part including at least inner surfaces of the first ball grooves.

Abstract: A constant velocity joint includes: an outer joint member having a raceway groove; an inner joint member having a leg shaft; a roller that is able to roll on the raceway groove; and a needle bearing that supports an inner periphery of the roller such that the inner periphery of the roller is able to rotate with respect to the leg shaft. The leg shaft includes: a roll portion that supports the needle bearing; a contact portion that is able to contact an end face of the needle bearing, the end face facing a first side in the direction of a central axis of the needle bearing; and a recess portion formed between the roll portion and the contact portion, in a position where the recess portion is recessed from a space in which the needle bearing is disposed.

Abstract: In a tripod type constant velocity universal joint 1, when D1 represents a large inner diameter being a diameter of a circle connecting radially outer end portions of roller guide surfaces 7 and D2 represents a small inner diameter being a diameter of a circle connecting radially inner end portions of the roller guide surfaces 7, a ratio D2/D1 between the small inner diameter D2 and the large inner diameter D1 is set within a range of from 0.73 to 0.80. Further, when d represents a large diameter of a spline formed in a trunnion hub 8 of a tripod member 3 and PCD represents a pitch circle diameter of the roller guide surfaces 7, a ratio d/PCD between the large diameter d and the pitch circle diameter PCD is set to 0.60 or more.

Abstract: A tripot constant velocity joint includes a housing defining a guide channel. A spider member is received within the housing and includes a trunnion having a functional outer surface with a convex profile defined by a first principal radius of curvature and a second principal radius of curvature different from the first principal radius of curvature. A first inner surface of a first ball member engages the functional outer surface of the trunnion. A first outer surface of the first ball member is provided with a non-symmetric piecewise continuous profile that engages the first sidewall.

Abstract: An inner joint part of a tripod constant velocity joint comprises a hub having an axis of rotation. Three projections extend radially outwardly. There is an adjoining transition region and a bearing region. A spherical circumferential surface of each projection forms a first surface line extending in a first plane. A resulting inner sphere contacts opposite points of the first surface line extending at least in first angle ranges adjacent to a respective point outside the inner sphere. A second surface line in a second plane touches the inner sphere at touch points only at the height of the largest diameter of the projection and extends at least in second angle ranges adjacent to the respective touch point within the inner sphere. A roller element has a convex inner circumferential surface, an extension line forming a radius having a maximum magnitude in a central region, less in an adjacent region.

Abstract: In a constant-velocity joint, an inner member thereof includes holders that serve to retain respective roller assemblies. When each of the holders is hypothetically divided into three equal parts made up of a proximal end portion, an intermediate portion, and a distal end portion from a side of an annular member, an inner wall surface of an inner roller of the roller assembly contacts only a side wall surface of the proximal end portion. The inner roller preferably has an inside diameter, which is minimum at a contact point that contacts the side wall surface of the proximal end portion. More specifically, the inside diameter of the inner roller gradually expands in diameter from the contact point to a side that faces toward the annular member, and further, gradually expands in diameter from the contact point to a side that faces toward the distal end portion.

Abstract: A drawer pull-out guide includes a carcass rail to be fixed to a furniture carcass, an extension rail displaceable relative to the carcass rail between a closed position and an open position, and a rolling body and a supporting body movable along a running limb of the carcass rail and a running surface of the extension rail upon a movement of the extension rail. A clearance is formed on the running limb of the carcass rail and/or on the running surface of the extension rail. The rolling body is accommodated within the clearance in the closed position of the extension rail and is thereby relieved from the load of the extension rail. In the closed position of the extension rail, the load of the extension rail is carried by the rolling body. The rolling body and the supporting body are arranged in a common running carriage.

Abstract: A constant-velocity joint 1 includes an outer ring with three raceway grooves formed therein, a tripod member having three tripod shaft portions, and roller units each having a cylindrical inner roller externally fitted over the corresponding tripod shaft portion and an outer roller. The outer roller has an annular surface facing a ceiling surface of a raceway groove. The ceiling surface includes first and second contact portions and that come into contact with an outer edge of the annular surface when the roller unit is tilted. When an outside diameter of the annular surface is represented as a roller end surface diameter A, a width of the outer roller in an axial direction is represented as a roller width B, and an interval between the first and second contact portions is represented as a contact portion interval H, a relational expression (A+B)/H?2.5 is satisfied.

Abstract: A boot for protecting the male and female elements of a transmission joint, one element is formed by a transmission shaft having radial arms for carrying rollers, the other is formed by a bell housing suitable for at least partially receiving the rollers suitable to be inserted into the bell housing's open end, the boot, has an elongate hollow body enabling the shaft to pass there through, with a “first” one of its ends suitable for being secured to the shaft, and its “second” end suitable for being positioned in overlapping and interfitting manner over the bell housing's open end. This boot has an internal peripheral shoulder, whose surface that faces towards the second end of the boot is provided with at least two recesses which open towards the second end, the inside of each recess forming a seat having a concave bearing surface for receiving a roller in thrusting contact.

Abstract: A tripod joint including an outer joint member with several axially extending elongate tracks; an inner joint member with several radial axle journals distributed over the outer circumference thereof; at least a number of rollers corresponding to the number of axle journals, where the roller is respectively pivotably retained with a central bore on the associated axle journal and is in engagement with the elongate tracks, where the roller is accommodated in the associated track so as to be displaceable in the axial direction of the outer joint member; where each axle journal includes on its circumference two outer diametrically opposed spherical end faces for engagement into the bore, where the bore has a cylindrical portion for engagement with the spherical end faces in order to support the roller so as to be displaceable relative to the journal, and at least a constricted portion that is adjacent thereto in the axial direction, while forming a continuous transition, on one side of the cylindrical portion, a

Abstract: A constant-velocity joint includes an inner member. The inner member has holders that hold respective roller assemblies. Each of the holders has contact regions, which are held in abutment against an inner circumferential wall surface of an inner roller of a corresponding one of the roller assemblies, and non-contact regions, which are spaced from the inner circumferential wall surface of the inner roller. The contact regions are formed by first through fourth lobes, and the non-contact regions are formed by first through fourth recesses, for example. Hypothetical tangential lines L1 and L3, which are tangential to the first lobe and the third lobe, extend parallel to the longitudinal directions of respective guide grooves. Hypothetical tangential lines L2 and L4, which are tangential to the second lobe and the fourth lobe, extend perpendicularly to the longitudinal directions of the guide grooves.

Abstract: A method of manufacturing an outer joint member of a constant velocity universal joint includes forming cup and shaft members of medium carbon steel, forging the cup member to have integrally formed cylindrical and bottom portions, and machining a joining end surface on an outer surface of the bottom portion after the forging. The method also includes preparing the shaft member to have a joining end surface to be joined to the bottom portion of the cup member, which is formed by machining, bringing the joining end surfaces of the cup and shaft members into abutment against each other and welding the cup and shaft members by radiating a beam from an outer side of the cup member to an abutment portion between the cup and shaft members in a radial direction of the cup member.

Abstract: A rolling boot comprises a first fastening region for fastening the boot to a joint casing, a second fastening region for fastening the boot to a shaft, and a fold region between the first and the second fastening region with a first fold near to the first fastening region and a second fold near to the second fastening region. The boot further comprises, between the first fastening region and the first fold, a first transition region comprising a first flange neighboring the first fastening region with a bottom. A ratio between a first minimal diameter D1, defined by the bottom of the first flange of the first transition region, and a second maximal diameter D2, defined by the first fold, where both are viewed in a longitudinal section direction along the main axis, is between approximately 1:1.01 to approximately 1:1.25.

Abstract: The properties of lubricating oil are utilized to avoid excessive quality in terms of the circularity of roller members while reducing the noise from a radial roller bearing alone during rotation and thereby reducing the noise from a rotary machine. The radial roller bearing includes an outer ring member (30A), a plurality of roller members (30B), and a retainer, and a lubricating oil (O) is supplied between the outer ring member (30A) or a rotating shaft and the roller members (30B). The circularity (?R) of the roller members (30B) in a cross section perpendicular to a centerline (CL) thereof is set to be lower than or equal to the minimum oil film thickness (hmin) of an oil film formed by the lubricating oil (O).

Abstract: One end face of an outer roller is provided with an annular rib that protrudes radially inward and that retains an inner roller and rolling elements. The other end face-side portion of the outer roller is provided with an inner component retaining portion that retains the inner roller and the rolling elements. In a roller unit in which the inner roller and the rolling elements are retained in the outer roller by the rib and the inner component retaining portion, an inner peripheral face of the inner roller through which a tripod shaft portion is passed is provided with a tripod shaft portion insertion restricting portion that allows the tripod shaft portion to be passed through the inner roller only from an end face side of the roller unit, on which the rib of the outer roller is not provided.

Abstract: Surgical tools having a two degree-of-freedom wrist, wrist articulation by linked tension members, mechanisms for transmitting torque through an angle, and minimally invasive surgical tools incorporating these features are disclosed. An elongate intermediate wrist member is pivotally coupled with a distal end of an instrument shaft so as to rotate about a first axis transverse to the shaft, and an end effector body is pivotally coupled with the intermediate member so as to rotate about a second axis that is transverse to the first axis. Linked tension members interact with attachment features to articulate the wrist. A torque-transmitting mechanism includes a coupling member, coupling pins, a drive shaft, and a driven shaft. The drive shaft is coupled with the driven shaft so as to control the relative orientations of the drive shaft, the coupling member, and the driven shaft.

Abstract: A flexible cover for an axle hub joint is provided. The flexible cover comprises a tubular member having a first end and a second end. The tubular member is configured to cover the axle hub joint. A first flange is defined at the first end of the tubular member and is rigidly attached to a wheel hub. A portion of the second end of the tubular member is configured to rotatably connect to a bearing groove and is free to rotate within the bearing groove.

Abstract: A rolling boot comprises a first fastening region for fastening the boot to a joint casing, a second fastening region for fastening the boot to a shaft, and a fold region between the first and the second fastening region with a first fold near to the first fastening region and a second fold near to the second fastening region. The boot further comprises, between the first fastening region and the first fold, a first transition region comprising a first flange neighbouring the first fastening region with a bottom. A ratio between a first minimal diameter D1, defined by the bottom of the first flange of the first transition region, and a second maximal diameter D2, defined by the first fold, where both are viewed in a longitudinal section direction along the main axis, is between approximately 1:1.01 to approximately 1:1.25.

Abstract: A mounting structure of a drive-shaft includes: a shaft; a housing; a spring guide slidably disposed inside the housing having one end facing the shaft; and a spring with one end supported by a spring guide and the other end supported by the housing, in which a transmission has a companion flange with a cup-shaped coupling portion at an end, so when the housing enters the coupling portion, an elastic force of the spring biases the housing into the coupling portion. Since a fixing bolt is not used, it is possible to quickly assemble and disassemble the drive-shaft in maintenance.

Abstract: After molding a product-to-be-preliminarily-molded to form a preliminarily molded product as a material, the preliminarily molded product is put into a full-enclosed forging die so that a product is molded with the full-enclosed forging die. On a preliminary leading-end surface to be formed as a leading end surface of a shaft portion of the product formed of the preliminarily molded product, there is formed a shear-drop suppressing portion for suppressing thickness reduction on a boss-portion side of an outer peripheral portion of the leading end surface of the shaft portion of the product. At a time of putting the preliminarily molded product into the full-enclosed forging die so as to mold the product, a relief portion is formed between the leading end surface of the shaft portion to be formed and a cavity of the full-enclosed forging die.

Abstract: A roller includes: an outer peripheral rolling contact surface which is shaped by a simultaneous process in a state where end faces of a plurality of rollers are in contact with each other; and a protrusion which is axially protruded further than an axial end of the outer peripheral rolling contact surface. The protrusion has a protruded end face which, when the outer peripheral rolling contact surface is ground, is in contact with the end face of one of the rollers which are adjacent to each other, and forms an axial gap between ends of the outer peripheral rolling contact surfaces of the rollers which are adjacent to each other, in a state where the protruded end face is in contact with the end face. The protrusion further has a gap with respect to a tool when the outer peripheral rolling contact surface is processed.

Abstract: In a sliding type constant velocity universal joint which includes a coil spring (14) employed to urge an intermediate shaft (13), a cylindrical portion (34) of a spring receptacle which supports an end of the coil spring (14) rises by a height h3, so that an edge (37) of the cylindrical portion (34) makes contact with a lower end surface of an outer ring (26) of a roller assembly (28) of an inner joint member (12) when the constant velocity universal joint takes a maximum operating angle.

Abstract: The invention relates to a tripod joint (1) comprising the following: an outer joint member (2) with several axially extending elongate tracks (4) formed therein and distributed over the inner circumference thereof; an inner joint member (3) with several radial axle journals (5) distributed over the outer circumference thereof; at least a number of rollers (6) corresponding to the number of axle journals (5), wherein the roller (6) is respectively pivotably retained with a central bore (20) on the associated axle journal (5) and is in engagement with the elongate tracks (4), wherein the roller (6) is displaceable in the associated track (4) in the axial direction of the outer joint member (2); wherein each axle journal (5) comprises on its circumference two outer diametrically opposed spherical end faces (16) for engagement into the bore (20).

Abstract: A tripod type constant velocity universal joint includes an outer joint member including three track grooves having roller-guide surfaces arranged to face each other in a circumferential direction, a tripod member including three leg shafts projecting in a radial direction, and roller units each including a roller and an inner ring for supporting the roller in a freely rotatable manner. The inner ring is externally fitted to corresponding one of the three leg shafts. The roller is movable along the roller-guide surfaces of corresponding one of the three track grooves. Each of the three leg shafts includes a region formed into a substantially circular-arc shape in horizontal cross-section that is orthogonal to an axial line of the each of the three leg shafts.

Abstract: One end face of an outer roller is provided with an annular rib that protrudes radially inward and that retains an inner roller and rolling elements. The other end face-side portion of the outer roller is provided with an inner component retaining portion that retains the inner roller and the rolling elements. In a roller unit in which the inner roller and the rolling elements are retained in the outer roller by the rib and the inner component retaining portion, an inner peripheral face of the inner roller through which a tripod shaft portion is passed is provided with a tripod shaft portion insertion restricting portion that allows the tripod shaft portion to be passed through the inner roller only from an end face side of the roller unit, on which the rib of the outer roller is not provided.

Abstract: The invention relates to a coupling device (200) to be installed between an output shaft and an input shaft, such as an output shaft of an electric motor and an input shaft of a reducing gear of an actuator for driving a screen or a hatch that is part of home-automation equipment for closure, solar protection, or projection. Said coupling device (200) includes a first member (201) which is rotatably secured, or suitable for being rotatably secured, to the output shaft, and which is provided with at least one longitudinal outer groove (2013), and a second member (202) which is rotatably secured, or suitable for being rotatably secured, to the input shaft, and which is provided with at least one longitudinal outer groove (2023).

Abstract: The present invention discloses a tripod joint including: a housing having one or more radially positioned track grooves; a spider having one or more radially positioned trunnions protruding from the outer circumferential surface of the spider, the one or more radially positioned trunnions disposed within the one or more radially positioned track grooves of the housing, wherein the spider is configured to move in the axial direction of the housing one or more rollers disposed on the one or more radially positioned trunnions, the one or more rollers in contact with the inner circumferential surface of the one or more track grooves of the housing; and a lubricating mechanism configured to supply oil to the trunnions and the rollers.

Abstract: The constant velocity joint consists of the input shaft (1), the output shaft (2), three spherical left arms (4L), three spherical right arms (4R), and the stabilising mechanism (3). The stabilising mechanism (3) is made up of three stabilising segments (3.1), (3.2), and (3.3). Stabilising segments have limited all degrees of freedom except the possibility of partial rotation around the axis of the stabilising mechanism (3). Each stabilising segment (3.1), (3.2) or (3.3) has one spherical arm (4L) and one spherical arm (4R) attached by means of a bolt (6), two groups of rolling elements (8), and a distance ring (12) in away they can only rotate around the axis of the bolt (6). The input shaft (1) carries on his body three arms (1.1), (1.2), and (1.3). The output shaft (2) carries on his body three arms (2.1), (2.2), and (2.3). In arms of both shafts there are outer rolling paths created for groups of rolling elements (9), which perform the function of radial-axial bearings.

Abstract: A sliding type tripod constant velocity joint includes a cage that supports the rolling elements such that the rolling elements circulate on an outer periphery of the intermediate member. The cage includes the first, second, third and fourth circulating paths having opening parts over an entire length in an outer peripheral side of the cage and widths of the opening parts of the third and fourth circulating paths are narrower than widths of the opening parts of the first and second circulating paths.

Abstract: A constant velocity joint includes a constant velocity joint housing with guide grooves on the inner side of the housing, a spider disposed in the constant velocity joint housing, combined with a shaft, and having a spider journal, and spherical rollers disposed in the guide grooves of the constant velocity joint housing. Needle bearings are disposed between the spherical rollers and the spider journals, in which a plurality of needle bearing insert holes is formed in the spherical rollers, and disposed in the needle bearing insert holes.

Abstract: Flexible transmission devices, for example for use a tool extensions for effecting rotation of fasteners that are difficult or impossible to access straight on using the normal output of a tool. A series of internal couplers are connected together end-to-end by constrained ball and socket joints that allow tilting between the axes of the couplers while constraining relative rotation of the couplers about said axes. The internal couplers form a flexible shaft inside an outer casing formed by a series of collar-shaped links joined in adjacent pairs by a single-axis pivot connection, each positioned to coincide with a respective one of the ball and socket joints.

Abstract: A constant velocity joint comprises: a hollow housing having a plurality of guide grooves; a tripod having a plurality of trunnions positioned in the guide grooves; and a roller assembly disposed on each trunnion. 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 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, in which the center of the second radius (Rrx) is displaced outwardly from the center of the first radius (Rry), and the second radius (Rrx) is shorter than the first radius (Rry).

Abstract: A sliding type tripod constant velocity joint includes a cage that supports the rolling elements such that the rolling elements circulate on an outer periphery of the intermediate member. The cage includes the first, second, third and fourth circulating paths having opening parts over an entire length in an outer peripheral side of the cage and widths of the opening parts of the third and fourth circulating paths are narrower than widths of the opening parts of the first and second circulating paths.

Abstract: A constant velocity joint for a drive system comprises: a tripod housing coupled to the first rotating shaft and having a plurality of guide grooves therein, each guide groove extending in an axial direction of the tripod housing; a spider coupled to the second rotating shaft and having a plurality of trunnions, each trunnion positioned in a corresponding guide groove of the tripod housing; and a spherical roller disposed between the trunnion and the guide groove of the tripod housing, and a plurality of needle rollers disposed between the trunnion and spherical roller. Each spherical roller is in angular contact with the guide groove of the tripod housing with two contact points displaced relative to a pitch circle diameter line of the tripod housing. The ratio of the length (CL) between two contact points of tripod housing groove to the length (SL) between two edges of spherical roller is between 0.5 and 0.

Abstract: A sliding type tripod constant velocity joint includes an outer ring of a tubular form having three raceway grooves which are formed on an inner peripheral surface and which extend in a direction of a rotation axis of the outer ring, a tripod including a boss part connected to a shaft and three tripod shaft parts which are provided upright so as to extend outward in a radial direction of the boss part from an outer peripheral surface of the boss part and which are inserted into the raceway grooves, respectively, and an intermediate member which is provided on an outer periphery of a corresponding one of the tripod shaft parts so as to be oscillated relative to the corresponding one of the tripod shaft parts and which has power transmission surfaces on both side surfaces and opposing the side surfaces of a corresponding one of the raceway grooves.

Abstract: A sliding type tripod constant velocity joint includes a pair of intermediate members arranged so as to sandwich a tripod shaft part from both sides of side surfaces of a raceway groove of an outer ring and to provide so as to be oscillated relative to the tripod shaft part. The sliding type tripod constant velocity joint further includes a plurality of rolling elements provided between side surfaces of the raceway groove and power transmission surfaces of the intermediate members opposing the side surfaces of the raceway grooves and a cage that supports the rolling elements such that the rolling elements circulate on outer peripheries of the intermediate members.

Abstract: A constant velocity joint comprises: a hollow housing having a plurality of axially-extending guide grooves; a tripod having a plurality of trunnions positioned in the guide grooves of the hollow housing; and a roller assembly including an inner roller having a spherical inner face 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. A cross sectional shape of the trunnion, taken in a direction perpendicular to the longitudinal axis of the trunnion, has a thickness at one or both lateral sides of the trunnion the same as or slightly less than a maximum non-interfering thickness of the trunnion, the maximum non-interfering thickness measured with the inner roller inclined by a predetermined degree relative to the longitudinal axis of the trunnion to assemble the trunnion into the inner roller.

Abstract: A sliding-type tripod constant velocity joint that includes needle units, each of which is able to prevent rolling elements from falling off in a state where the rolling elements are introduced in a cage, is provided. Each cage (60) of a constant velocity joint (1) forms circulation paths that are trajectories of circulating rolling elements (50), and is formed of a pair of first circulation path forming member (70) and second circulation path forming member (80) that are coupled to face each other so as to respectively support both axial ends of the rolling elements (50). Then, at least one of the circulation path forming members (70 (80)) has a window portion (75 (85)) that is open so as to be able to introduce the rolling elements (50) laterally with respect to a circulating direction into the circulation paths and a rib portion (76 (86)) that is formed so as to extend from a periphery of the window portion (75 (85)) in an introducing direction in which the rolling elements (50) are introduced.