A boot includes a large-diameter tubular portion, a small-diameter tubular portion, and a bellows portion. The large-diameter tubular portion includes a fastening groove into which a fastening member is fitted, an opening end to which the bellows portion is coupled and into which an outer case is inserted, at least one seal lip having an annular shape and protruding from an inner circumferential surface of the large-diameter tubular portion at the position where the fastening groove is projected to the inside in the radial direction, so as to be continuous over the entire circumference, and a protrusion protruding from the inner circumferential surface on the opening end side with respect to the seal lip so as to be provided over the entire circumference. A height of the protrusion is set to be smaller than a height of the seal lip.

A half-shaft assembly includes a first constant velocity (CV) joint, a second CV joint and an axial movement joint connected between the first CV joint and the second CV joint. The axial movement joint includes a first shaft coupled to the first CV joint and a second shaft coupled to the second CV joint, wherein mechanical input received on the first shaft is communicated to the second shaft, and wherein the second shaft slides axially within the first shaft. The axial movement joint further includes an axial boot cover coupled on a first end to the first shaft and on a second end to the second shaft that accommodates axial movement of the first shaft relative to the second shaft. The first constant velocity (CV) joint is coupled to provide torsional input received at an input to the first shaft, the first CV joint having a first CV boot cover. The second CV joint coupled to provide torsional output received from the second shaft to an output, the second CV joint having a second CV boot cover.

The present disclosure relates to a ball spline device, an automated guided vehicle and a stereoscopic warehouse system. The ball spline device includes: a spline shaft, an outer side wall of which is provided with a raceway groove extending along an axial direction, the raceway groove includes a first groove section and a second groove section communicated along the axial direction, a width of the second groove section being greater than the width of the first groove section; a spline nut coaxially, sleeved outside the spline shaft; and a first rolling body, movably disposed in the raceway groove along the axial direction to achieve relative movement of the spline nut and the spline shaft. When the spline nut is in a first position, the first rolling body is in the first groove section, and cooperates with the first groove section in a constrained manner to cause synchronous rotation of the spline nut and the spline shaft; and when the spline nut is in a second position, the first rolling body is in the second groove section, so that there is a predetermined gap in a circumferential direction between the spline shaft and the spline nut.

A half-shaft assembly includes a first constant velocity (CV) joint, a second CV joint and an axial movement joint connected between the first CV joint and the second CV joint. The axial movement joint includes a first shaft coupled to the first CV joint and a second shaft coupled to the second CV joint, wherein mechanical input received on the first shaft is communicated to the second shaft, and wherein the second shaft slides axially within the first shaft. The axial movement joint further includes an axial boot cover coupled on a first end to the first shaft and on a second end to the second shaft that accommodates axial movement of the first shaft relative to the second shaft. The first constant velocity (CV) joint is coupled to provide torsional input received at an input to the first shaft, the first CV joint having a first CV boot cover. The second CV joint coupled to provide torsional output received from the second shaft to an output, the second CV joint having a second CV boot cover.

A turbomachine includes a low-pressure shaft that drives a fan shaft in rotation by a coupling assembly including a first shaft on which are formed plural first axial grooves, a second shaft on which are formed plural second axial grooves, and a coupling device including rolling elements and an annular cage positioned between the first shaft and the second shaft. The rolling elements are positioned between one of the first axial grooves and one of the second axial grooves to couple in rotation the first and the second shaft. Each first and second groove has a first and a second substantially planar surface inclined with respect to one another and extending along the axis.

A shaft characterized by its length to diameter ratio being less than about 1.75 having a drive connection at one end where the wall thickness of the shaft is selected to be thick enough to avoid ellipticalization strain error in torsional measurement of less than 5%. One specific application is for a crankset spindle that can be used to measure a cyclist right, left, and total leg torque.

A steering shaft assembly comprising female shaft and a male shaft. The female shaft includes an inner surface defining a plurality of outer roller bearing tracks. The male shaft includes an outer surface defining a plurality of inner roller bearing tracks. An adaptable sleeve assembly is located between the inner surface of the female shaft and the outer surface of the male shaft and includes a body. The body defines an outer surface for contacting the inner surface of the female shaft and an inner surface for contacting the outer surface of the male shaft. The body defines at least one rib projecting radially outwardly from the outer surface of the body and projecting radially inwardly from the inner surface of the body. The at least one rib is inserted into one of the plurality of inner roller bearing tracks and one of the plurality of outer roller bearing tracks.

A foldable infant bed with an unfolded position and a folded position, comprising a plurality of vertical supports and a chassis support arranged between the plurality of vertical supports. A folding joint including a first main support frame, a second main support frame, a first auxiliary support rod, and a second auxiliary support rod, and a rotation mechanism for the foldable infant bed is also provided.

An installation device for installing rollers in a shaft-hub connection includes a base ring having radially inwardly opening recesses configured to receive axial end portions of the rollers. The recesses extend axially and are distributed circumferentially, and the base ring including the received rollers is configured to be pushed onto a shaft. Also an installation method of installing the installation unit and rollers between a shaft and a hub.

A steering column is disclosed for a motor vehicle, including an actuating unit, in which a steering spindle is rotatably mounted about a longitudinal axis. The actuating unit includes a casing unit which has at least three casing tubes which are arranged so as to be axially telescopable relative to one another. One of the casing tubes forms an outer casing tube in which at least one intermediate casing tube, in which an inner casing tube is accommodated, is accommodated. Rolling bodies are arranged between the casing tubes such that they are able to roll in the axial direction. First rolling bodies are arranged between the outer casing tube and the intermediate casing tube, and second rolling bodies are arranged between the intermediate casing tube and the inner casing tube, the first rolling bodies being arranged offset in the circumferential direction relative to the second rolling bodies.