Tripod type constant velocity joint

A tripod type constant velocity joint comprising:

• a hollow cylindrical housing fixed to an end of a first rotary shaft and formed with axially extending recessed grooves opened at one axial end and located at circumferentially trisectional positions on an inner peripheral surface;
• a tripod comprising a boss fixed to an end of a second rotary shaft, and end-spherical trunnion journals radially projecting from circumferentially trisectional positions on the boss;
• and
• roller assemblies, each roller assembly comprising an inner roller swingably fitted at the inner peripheral surface thereof on the spherical outer peripheral surface of the trunnion journal, and an outer roller supported for rotation and axial movement on the outer peripheral surface of the inner roller through needle rollers,
• wherein the outer rollers are received in the recessed grooves in the housing and roll axially within the housing, each recessed groove consists of guide surfaces contacting the outer peripheral surface of the outer roller and subjected to loads, and guide shoulder surfaces for guiding the outer roller axially within the housing,
• wherein at least one end of the inner peripheral surface of the outer roller is integrally provided with a needle roller retainer, and
• wherein the trunnion journals radially project from an outer surface of said boss that is chamfered more on a side of the tripod from which the second rotary shaft extends axially away from the housing than on a side of the tripod from which the first rotary shaft extends axially away from the housing.

A tripod type constant velocity joint comprising:

• a hollow cylindrical housing fixed to an end of a first rotary shaft and formed with axially extending recessed grooves opened at one axial end and located at circumferentially trisectional positions on an inner peripheral surface;
• a tripod comprising a boss fixed to an end of a second rotary shaft, and end-spherical trunnion journals radially projecting from circumferentially trisectional positions on the boss;
• and
• roller assemblies, each roller assembly comprising an inner roller swingably fitted at the inner peripheral surface thereof on the spherical outer peripheral surface of the trunnion journal, and an outer roller supported for rotation and axial movement on the outer peripheral surface of the inner roller through needle rollers,
• wherein the outer rollers are received in the recessed grooves in the housing and roll axially within the housing, each recessed groove consists of guide surfaces contacting the outer peripheral surface of the outer roller and subjected to loads, and guide shoulder surfaces for guiding the outer roller axially within the housing,
• wherein at least one end of the outer peripheral surface of the inner roller is integrally provided with a needle roller retainer, and
• wherein the trunnion journals radially project from an outer surface of said boss that is chamfered more on a side of the tripod from which the second rotary shaft extends axially away from the housing than on a side of the tripod from which the first rotary shaft extends axially away from the housing.