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A tripot universal joint of the end motion type is provided. The joint includes a first shaft with a cup-shaped member at one end having three axially-extending, parallel grooves in its inner periphery. Another shaft has a spider at one end with three trunnions extending radially outwardly. A roller

A tripot universal joint of the end motion type is provided. The joint includes a first shaft with a cup-shaped member at one end having three axially-extending, parallel grooves in its inner periphery. Another shaft has a spider at one end with three trunnions extending radially outwardly. A roller is mounted on each trunnion for slidable, rotatable, and pivotal movements with respect to the trunnion. The roller is maintained with its axis perpendicular to the associated groove, even when the spider shaft is positioned at a substantial angle to the axis of the first shaft and the cup-shaped member. The roller mounting includes a guide ring slidably mounted on the trunnion for axial movement with respect thereto, the guide ring having an outer segmental spherical surface. Bearings having surfaces formed by a curved generatrix with a radius extending away from the longitudinal axis of the bearings and being substantially equal to the radius of the spherical surface of the guide ring are located around the guide ring which forms an inner race. The roller is positioned around the bearings and forms an outer race. The annular surface of the roller adjacent the bearings can be curved in transverse cross section to fully support the bearings. The surface can also be flat in transverse cross section to support end portions of the bearings. In that instance, the bearings having generally cylindrical end portions engaged by the flat surface of the roller for support.

대표청구항 ▼

In a slidable universal joint of the end motion type having an outer cup-shaped member, a plurality of generally axially-extending grooves positioned substantially parallel to one another in said member, a shaft having a spider affixed to an end portion thereof, said spider having a plurality of rad

In a slidable universal joint of the end motion type having an outer cup-shaped member, a plurality of generally axially-extending grooves positioned substantially parallel to one another in said member, a shaft having a spider affixed to an end portion thereof, said spider having a plurality of radially-extending trunnions, there being one for each of said grooves, a guide ring located on each of said trunnions for slidable movement therealong, a plurality of bearings located in two rows around each of said guide rings, each of said bearings being of circular transverse cross section throughout its length and having a contour, between outer end portions of the bearing, similar to a portion of the contour of the outer surface of said guide ring, with the surfaces of said bearings between the outer end portions fully contacting the outer surfaces of said guide rings, each of said bearings having a truncated conical end portion beyond each of said outer end portions, the truncated conical end portions of each of said bearings tapering in a common direction, a roller around each of said rings and said two rows of bearings, each of said rollers having two inner, annular grooves therein, one of which contacts and supports peripheral surfaces of the bearings in one row and the other of which contacts and supports peripheral surfaces of the bearings in the other row, the truncated conical end portons of all of the rollers in one row tapering in a common direction opposite to the direction of taper of the truncated conical end portions of the bearings in the other row.