The present invention relates to a boot assembly of a drive axle in which a bearing seal of a wheel bearing is removed to reduce drag torque and also reduce friction noise occurring in a wrinkled portion of the boot, and introduces a boot assembly of a drive axle configured to include: a wheel bearing assembled to a wheel housing; an outer ring formed in a ring shape and having an outer diameter part fixed to an outer wheel of the wheel bearing; a boot having a large diameter part of one end thereof, assembled to an inner diameter part of the outer ring; and a bearing seal unit assembled between a small diameter part of the other end thereof and a driveshaft by a band to prevent the introduction of foreign matter while restricting the rotation of the boot.

In a fixed type constant velocity universal joint according to the present invention, six torque transmitting ball tracks (20) are defined as a first track, a second track, a third track, a fourth track, a fifth track, and a sixth track along a circumferential direction. Further, in the fixed type constant velocity universal joint according to the present invention, an axial offset amount of a curvature center of each of track grooves (12) of an outer joint member (13) and an axial offset amount of a curvature center of each of track grooves (15) of an inner joint member (16) are set to 0. Further, in the fixed type constant velocity universal joint according to the present invention, the track grooves (12) of the outer joint member (13) and the track grooves (15) of the inner joint member (16) are each inclined with respect to an axis line.

An universal joint configured to transfer rotational movement from a first shaft to a second shaft at an angle and method of manufacturing the same.

An x-joint configured to transfer rotational movement from a first shaft to a second shaft at an angle and method of manufacturing the same.

A segmented driveshaft for transmission of torque and thrust loads from one member to another along an eccentric axis of rotation. The segmented driveshaft includes a plurality of pivotally interconnected vertebrae that is distributed along a connecting rod that is pivotally connected to a drivetrain assembly. The each vertebra has male and female interlocks that are pivotally mated with the male and female interlocks of an adjacent vertebra. Interposed between the adjacent vertebrae are independent male and female pivots that pivotally engage with each another. The pivotally mated interlocks of adjacent vertebrae and the pivotally engaged pivots allow the driveshaft to extend between connecting points of a drivetrain assembly that have offset axes of rotation.

A plunging type constant velocity universal joint has six torque transmission balls, and a curvature center of a spherical outer peripheral surface and a curvature center of a spherical inner peripheral surface of a cage are offset toward opposite sides in an axial direction with respect to a joint center. The plunging type constant velocity universal joint is used at a normal operating angle of from 8 to 12. A ratio D.sub.BALL/DS.sub.PCD of a diameter (D.sub.BALL) of the torque transmission ball to a spline pitch circle diameter (DS.sub.PCD) of a coupling hole of an inner joint member is within a range of 0.80 to 0.86. A contact angle of the torque transmission ball and a linear track groove is within a range of 32 to 35. A contact ratio of the torque transmission ball and the linear track groove is within a range of 1.05 to 1.08.

A constant velocity joint for a propeller shaft which is provided between a first propeller shaft and a second propeller shaft of a propeller shaft to connect the first propeller shaft and the second propeller shaft comprises an outer race member formed into a cylindrical shape, to which the first propeller shaft is connected, the outer race member including an outer race groove portion provided at an inner periphery of the outer race member in a recessed manner at a predetermined angle with respect to a rotational axis direction of the constant velocity joint; a ball member disposed in the outer race groove portion; a cage provided on an inner peripheral side of the outer race member and provided with a window portion that retains the ball member; and an inner race member provided on an inner peripheral side of the cage and connected to the second propeller shaft, the inner race member including an inner race groove portion provided at an outer periphery of the inner race member in a recessed manner so as to intersect with the outer race groove portion, the inner race groove portion in which the ball member is disposed; and a recessed portion formed on a second propeller shaft side in a bottom portion of the inner race groove portion to have a smaller diameter than rest of the bottom portion of the inner race groove portion.

A constant velocity universal joint is assembled as a crown ball meshed within a housing socket for rotation about respective rotational axes. The outside diameter of the crown ball is greater than the inside diameter of the socket. A plurality of channels, equally spaced around the crown ball perimeter are cut into the crown ball surface generally along or parallel with the crown ball drive axis. An arcuate cup is cut into each crown ball channel to confine a respective torque transfer element. A number, corresponding to the number of crown ball channels, of partial cylinder channels are cut into the inside surface of the housing socket. One of opposite side walls for each housing channel is given an arcuate radius corresponding to that of the force transfer elements. Ridges between adjacent crown ball channels mesh with ridges between adjacent housing socket channels. Torque transfer elements confined within said crown ball cups engage the partial cylinder wall of the housing channels to transfer drive forces between the crown ball and socket housing through a departure angle between the respective rotational axes.