Abstract: A constant velocity universal joint smoothly rotates under a high operating angle and large torque and reduces an excessive load applied to the cage. The universal joint includes an outer joint member having an inner spherical surface with multiple track grooves and an inner joint member having an outer spherical surface with multiple track grooves paired with the track grooves of the outer joint member. The universal joint also includes multiple balls interposed between the track grooves of the inner and outer joint members to transmit torque and a cage interposed between the outer joint member and the inner joint member to retain the balls. A tapered relief portion retracted with respect to the outer spherical surface is formed with low curvature at a back end portion of the outer spherical surface of the inner joint member to be smoothly continuous with the outer spherical surface.

Abstract: A light and compact slide-type constant velocity universal joint has a maximum operating angle of 30° or more through optimization of a ball contact angle relative to ball grooves, a ball contact ratio, and a cage offset amount. In the slide-type constant velocity universal joint, a ratio of ball diameter to outer ring outer diameter is 0.21 to 0.25, a ratio of ball pitch diameter to outer ring outer diameter is 0.64 to 0.68, a contact angle of the ball groove is 30° to 35°, a contact ratio of the ball groove is 1.02 to 1.08, and a ratio of cage offset amount to ball pitch diameter is 0.07 to 0.09.

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 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 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 having different chamfer angles is provided at a shaft insertion side end portion of the shaft hole. The two-step chamfer includes a first chamfer section situated on a shaft hole opening side and a second chamfer section provided on the side opposite to the shaft hole opening so as to be continuous with the first chamfer section. The chamfer angle ? of the first chamfer section is set larger than the chamfer angle ? of the second chamfer section.

Abstract: Provided is an outer joint member for a fixed type constant velocity universal joint, the outer joint member contributing to reduction of the number of man-hours through reduction of the number of post processes after a forging process, and to an increase in yield, and reduction of manufacturing cost. The outer joint member for a fixed type constant velocity universal joint includes a cup section (16) and a shaft section (18) extending in an axial direction from a bottom portion of the cup section (16). The outer joint member is made of machine-structural carbon steel. The following portions of the outer joint member are finished by cold forging: track grooves (12); radially inner spherical-surface portions (14a); a cup-inlet chamfer (12b); track chamfers (12c); track-inlet chamfers (12a); a part except for a boot fixing portion (19) on a radially outer surface of the cup section (16); and a center hole (13) at an end surface (18a) of the shaft section (18).

Abstract: Provided is a fixed type constant velocity universal joint, including: an outer joint member having an inner spherical surface provided with a plurality of track grooves extending in an axial direction; an inner joint member having an outer spherical surface provided with a plurality of track grooves extending in the axial direction in pairs with the plurality of track grooves of the outer joint member; a plurality of balls interposed between the plurality of track grooves of the outer joint member and the plurality of track grooves of the inner joint member so as to transmit torque; and a cage interposed between the inner spherical surface of the outer joint member and the outer spherical surface of the inner joint member so as to hold the plurality of balls, at least one of the plurality of track grooves of the outer joint member and the plurality of track grooves of the inner joint member being formed by cold-forging finishing, in which components including the outer joint member, the inner joint member, t

Abstract: Provided is a fixed type constant velocity universal joint which is capable of achieving the following even at the time of an unexpected high-angle operation, in particular, even when an angle expected during use of a constant velocity universal joint is exceeded: reduction of stress generated when balls and edge portions interfere with each other, suppression of chipping of the edge portions, and prolongation of a service life of the joint as a whole.

Abstract: The present invention provides a compact constant velocity universal joint having high strength, and superior operability and durability. In the constant velocity universal joint of the present invention, an offset angle øT formed by a center of curvature OT0 of a guiding groove 2b of an outer component 2, an intersecting point Q between a joint plane P and a PCD, and a center of curvature OT1 of a guiding groove 3b of an inner component 3 is set to 11.0°?øT?15.0°.

Abstract: Provided is a fixed type constant velocity universal joint capable of obtaining, in every angular region, wear resistance against rolling of balls and a stable high fatigue strength characteristic. The fixed type constant velocity universal joint includes: an outer joint member including an inner surface (21) in which a plurality of track grooves (22) are formed; an inner joint member including an outer surface (24) in which a plurality of track grooves (25) are formed; a plurality of balls (27) interposed between the track grooves (22) of the outer joint member and the track grooves (25) of the inner joint member so as to transmit torque; and a cage (28), which has pockets (29) for housing the balls (27), and is interposed between the outer joint member and the inner joint member. When a maximum operating angle is formed, the balls (27) roll up to track-groove-opening-end portions (22a) of the outer joint member.

Abstract: A fixed constant velocity universal joint using eight torque transmitting balls has a ratio which a non-hardened layer assumes in a bar 48 of a cage 40 is set to be 0.30?C/S?0.75, where S represents a cross-sectional area of the bar 48 and C represents an area of the non-hardened layer.

Abstract: In order to ensure sufficient strength of an inner joint member even when the thickness of the inner joint member is reduced for achieving reduction in weight and size and even when a high operating angle is formed and high load torque is applied, a constant velocity universal joint includes: an outer joint member (10) having an inner surface (12) in which a plurality of track grooves (14) extending in an axial direction are formed; an inner joint member (20) having an outer surface (22) in which a plurality of track grooves (24) extending in the axial direction are formed while being paired with the track grooves (14) of the outer joint member (10), and an inner surface having a shaft hole (26) in which a spline (28) extending in the axial direction is formed; a plurality of balls (30) interposed between the track grooves (14) of the outer joint member (10) and the track grooves (24) of the inner joint member (20) so as to transmit torque; and a cage (40) interposed between the inner surface (12) of the oute

Abstract: Provided is a constant velocity universal joint capable of being smoothly rotated even when a high operating angle is formed and large torque is born and of reducing excessive load applied to the cage so as to strengthen the cage. The constant velocity universal joint includes an outer joint member having an inner spherical surface (1) in which multiple track grooves (2) are formed; an inner joint member having an outer spherical surface (4) in which multiple track grooves (5) paired with the track grooves (2) of the outer joint member are formed; multiple balls (7) interposed between the track grooves (2) of the outer joint member and the track grooves (5) of the inner joint member so as to transmit torque; and a cage (9) interposed between the inner spherical surface (1) of the outer joint member and the outer spherical surface (4) of the inner joint member so as to retain the balls (7).

Abstract: The constant velocity universal joint includes a plurality of vehicle body attachment flanges provided apart from each other in the outer circumferential direction of the joint outer ring and partly protruding in the radial direction. The joint outer ring has a flower outer circumferential shape corresponding to the inner circumferential shape, and the vehicle body attachment flanges are provided at outer recesses positioned between the track grooves of the joint outer ring. In this joint, the number of the balls is six, and the pitches of the ball tracks are random, unequal and not less than 55.

Abstract: Provided is a fixed type constant velocity universal joint capable of securing smooth rotation and reducing a load on a cage even at a large operating angle and at a time of bearing large torque.

Abstract: The present invention provides a light and compact slide-type constant velocity universal joint that can have a maximum operating angle of 30° or more through optimization of a ball contact angle relative to ball grooves, a ball contact ratio, and a cage offset amount.

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 outer diameter of a joint outer ring is reduced using simple means, so that a constant velocity universal joint that can easily be reduced in weight and size is provided. It is an object to improve the unnerving vibrations, muffled noises, and the like. The constant velocity universal joint includes a joint outer ring having a plurality of track grooves formed in the inner circumference, a joint inner ring provided with track grooves corresponding to the track grooves of the joint outer ring, a plurality of balls provided in the ball tracks interposed between the joint outer ring and the joint inner ring and formed by cooperation of the track grooves to transmit torque, and a cage having pockets for retaining the balls. In the constant velocity universal joint having a plurality of vehicle body attachment flanges provided apart from each other in the outer circumferential direction of the joint outer ring and partly protruding in the radial direction.

Abstract: The constant velocity universal joint includes a plurality of vehicle body attachment flanges provided apart from each other in the outer circumferential direction of the joint outer ring and partly protruding in the radial direction. The joint outer ring has a flower outer circumferential shape corresponding to the inner circumferential shape, and the vehicle body attachment flanges are provided at outer recesses positioned between the track grooves of the joint outer ring. In this joint, the number of the balls is six, and the pitches of the ball tracks are random, unequal and not less than 55 degree.

Abstract: In a drive shaft which is installed in a mounted type vehicle designed to traverse uneven terrains and which transmits drive power to the wheels through constant velocity joints on the inboard and outboard sides, a double offset type constant velocity joint is used on the inboard side and an undercut free type constant velocity joint is used on the outboard side, the ratio of the PCD of the double offset type constant velocity joint to the ball diameter (PCD/d=r1) being in the range 3.0<r1<3.2.

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 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 procedure for finding and identifying red cell antibodies by means of the solid-phase method, comprising contacting erythrocytes having selected antigen patterns with sera or plasmas that are to be tested for antibodies and transferred along with a polyspecific anti-human globulin reagent onto a substrate coated with protein A or protein G, thereby to transfer the detection or identification cells or, in the case of autocontrols, inherent cells.