A cover assembly for a circular bearing port in the yoke of a universal joint comprises a plurality of separate cover segments configured and dimensioned for insertion into the port in positions coacting with each other to close the port. Each of the cover segments has an outer edge seated in a locking groove circumscribing an interior surface of the port. The cover segments are interconnected to form an integral circular cover, and the cover is rotationally fixed with respect to the yoke.

A protective ring for a sealing arrangement of a bearing bushing of a journal cross assembly is disclosed. The protective ring has an annular sleeve segment, which is concentric to a longitudinal axis, an annular seat segment which extends radially inward at a rear axial end of the sleeve segment, and at least one protrusion, which protrudes radially inward at a front axial end region of the sleeve segment. The protective ring also has a plurality of webs, which are distributed over the circumference and which protrude axially from the seat segment and are arranged inside the sleeve segment.

A robot apparatus includes: a base plate; a rotation-driving motor provided on the base plate; a transmission mechanism that is provided on a bottom surface side of the base plate and to which a rotational force of the rotation-driving motor is transmitted; and a rotation-driving mechanism that is provided on the bottom surface side of the base plate and to which the rotational force of the rotation-driving motor is input via the transmission mechanism. A workpiece is rotated by the rotation-driving mechanism at an end of the rotation-driving mechanism opposite to the base plate.

A universal joint bearing having a cup that serves as an outer ring of the universal joint bearing. The universal joint bearing includes exactly one sealing ring that is provided for sealing a gap between the cup and a trunnion.

A sealing assembly for a cup bearing of a universal joint includes a seal sub-assembly configured to be positioned in a space between a cup of the cup bearing and a trunnion of the universal joint. The seal sub-assembly includes an elastic sealing member configured to contact an outer surface of the trunnion, and a seal insert attached to the elastic sealing member and configured to contact an inner surface of the cup. The seal insert includes an extension portion configured to contact and extend away from a rim surface of the cup. The sealing assembly further includes an external shield including an inner portion and an outer portion. The inner portion is configured to contact the outer surface of the trunnion, and the outer portion is attached to the extension portion of the seal insert.

A component of a universal joint bearing includes at least one casing having a cylindrical wall and a base and at least one formation projecting from the base. The at least one formation is receivable in a clamp of a rotational processing machine to secure the component to the rotational processing machine during a rotational machining of a wall of the component. Also a method that includes clamping the component by the formation and machining inner and outer surfaces of the component without unclamping the component.

The drive shaft (1) comprises end universal joints (5, 7) with accident-preventing end protections (19). Each accident-preventing end protection comprises a lubricant reservoir, delimited radially inwardly by a sleeve (63) of an inner fork (23) of the respective universal joint (5; 7) and radially outwardly by a rigid annular structure of the accident-preventing end protection.

A universal joint having a retainer ring that secures a bearing cup to a cross shaft. A bearing cup retainer may secure the bearing cup to the retainer ring. A cross shaft retainer may secure the retainer ring to the cross shaft. A seal may extend from the body of the retainer ring to the cross shaft.

A universal joint includes a joint cross having a plurality of bearing journals, each bearing journal being supported in a bearing bushing by a plurality of trunnion bearing rolling elements, the universal joint also including a seal assembly configured to seal the journal cross against the bearing bushing. The bearing bushing includes a sleeve for slidingly supporting at least one seal lip of the seal assembly, the sleeve has an axially inner region facing the rolling elements, and the axially inner region has a radially inner portion and a radially outer portion. The radially inner portion is axially offset from the radially outer portion towards the rolling elements by an offset amount.

A seal for a cross member unit for universal joints has a carrier ring to be inserted into a bearing cup of the cross member unit. The carrier ring has an L-shaped cross section with a cylindrical portion coaxial to a longitudinal axis and a flange portion extending form the cylindrical portion inwardly. An elastomeric sealing lip element is connected to the carrier ring. The sealing lip element has first engagement elements form fittingly engaging into first engagement apertures. The first engagement apertures extend through the flange portion of the carrier ring. The sealing lip element further has second engagement elements form fittingly engaging into second engagement apertures. The second engagement apertures extend through the cylindrical portion of the carrier ring.