A modular foundation support system includes modular foundation support components including self-aligning and torque transmitting coupler features wherein a plurality of axially elongated ribs are aligned with a plurality of axially elongated ribs on a second distal end to rotationally interlocked the modular foundation support components to one another. First and second pair of fastener holes are self-aligning with one another to receive a fastener therethrough such that the fastener is mechanically isolated from rotational torque transmission.

Provided is a power transmission shaft, including: a metal shaft member; and a resin shaft member connected to the metal shaft member in an axial direction of the power transmission shaft. The resin shaft member is made of fiber reinforced plastic. The metal shaft member and the resin shaft member are joined to each other through a close-contact fitting portion between a male spline, which is formed in an outer surface of the metal shaft member, and a female spline formed by press-fitting the male spline into the resin shaft member. An edge is formed at a radially outer edge portion of a press-fitting-start end surface of the male spline of the metal shaft member.

A connector system facilitates the connection of a first tree trunk to a second tree trunk of an artificial tree system. The connector system can prohibit rotation of the first tree trunk relative to the second tree trunk.

A power transmission shaft includes: a bearing including a cylindrical portion, an internal spline portion, and an internal spline side annular groove including a bottom surface, and a first side wall and a second side wall, the first side wall which includes a first inclination surface inclined with respect to the rotation axis of the shaft portion, and on which the circlip is abutted in a state where a radius of the circlip is decreased within the internal spline side annular groove, and the second side wall on which the circlip is abutted in the state where the radius of the circlip is decreased within the internal spline side annular groove.

For providing a shaft-hub connection which doesn't require additional transmission elements or intermediate elements, assures a better position of the load transfer angle and can be manufactured economically with the required quality and precision, the disclosure proposes a shaft-hub connection having an alignment gearing with a plurality of dogs, wherein the dogs comprise a contour in cross section, which runs, at least partially, along a prolonged trochoid.

A connection system for connecting a component to a gear wheel, wherein the gear wheel comprises helical gearing having a tooth helix angle and a first connecting section, and the component comprises a second connecting section by way of which the component can be connected or is connected to the first connecting section, wherein the component, in the second connecting section, comprises at least one depression or elevation that is operatively connected to the first connecting section when the component is connected to the first connecting section, wherein the depression has a connection helix angle, and the connection helix angle is defined as follows: 0. The disclosure furthermore relates to a device for transmitting a rotational movement, comprising a rotatable component and a gear wheel, wherein the gear wheel and the component are connected by way of such a connection system.

A motor vehicle steering system is disclosed. The system includes a steering spindle consisting of spindle members which are non-rotatably connected to one another. One end of a spindle member has a spline shaft profile and is introduced into a sleeve-like intermediate piece which is arranged on the other spindle member and, on the inner periphery, has a negative-shaped spline shaft profile with respect to the spline shaft profile such that the spindle member is plug-connected to the intermediate piece. In order for the spindle members to be able to be connected to each other with minimal effort even in the event of visual inaccessibility, a circumferential guide contour pointing toward the intermediate piece is formed on the spindle member. The guide contour is upstream of the spline shaft profile toward the intermediate piece and is perforated by grooves of the spline shaft profile to form convex guide segments.

A shaft (1) is shown comprising a shaft section (2) having an axis (3), a tooth geometry (4) at least at one end of said shaft section, said tooth geometry (4) having a first end (5) opposite said shaft section (2) and a second end (6) adjacent said shaft section (2), a number of teeth (7) distributed in circumferential direction around said axis (3), a bottom curve (9) between adjacent teeth (7), and an outer tooth curve (12), said bottom curve (9) having a positive slope from said first end (5) towards said shaft section (2) and a negative slope (14) at said second end (6). In such a shaft wear should be made as small as possible. To this end said bottom curve (9) comprises a section having a concave bottom curvature (15) between said positive slope and said negative slope.

A drive shaft is formed by welding two spline shaft heads to a hollow middle section of tubing. The spline shaft head includes teeth which are crowned to permit an angular offset of the drive shaft relative to cylindrical splines of connectors, such that the end faces of the teeth define a barrel shape. The teeth of the spline shaft head include a side face curvature, defining a football-shaped tooth cross-section. Torque is rotationally transmitted across a permitted angular offset of the drive shaft relative to cylindrically arranged linear splines of drive and driven connectors (i.e., relative to the engine output axis of rotation and the differential input axis of rotation), thereby avoiding the use of prior art universal joints.

A joint assembly having a first joint member drivingly connected to a second joint member via a third joint member. The second joint member has a shaft portion extending from an intermediate portion of the second joint member. A plurality of shaft portion splines circumferentially extend from the outer surface of the shaft portion. At least a portion of a second end portion of the plurality of shaft portion splines includes an installation aid having a first end, a transition portion and a second end. The installation aid further includes a first portion from the first end to the transition portion and a second portion from the transition portion to the second end of the installation aid. An outermost diameter of the plurality of shaft portion splines of the first and/or the second portion of the installation aid is defined by a radius from a centerline of the joint assembly.