Nippon Seiko Kabushiki Kaisha

Takaaki Shiratani

Hiroshi Suzuki

Yasuo Murakami

Hisashi Machida

Kyozaburo Furumura

Youichi Matsumoto

Moichi Chiba

Kenji Takei

Soji Nishida

Seiji Namba

An apparatus for supporting a rotating shaft of a vehicle transmission with a roller bearing has a pair of seals which have an inner peripheral edge slanted toward and come very close to the end surface of the rollers of the roller bearing, whereby when the rotating shaft is tilted and inserted into the roller bearing, it is hard for the end of the rotating shaft to hit the seal on the opposite side from insertion.

Apparatus for supporting rotary shaft in vehicle transmission

In a toroidal type infinitely variable transmission wherein power is transmitted between input and output discs by a transmission roller, the angle .theta. formed by the points of contact with the two discs with respect to the center of rotation of the transmission roller is set to 105.degree. or greater. Also, the curvature ratio R.sub.2 /R.sub.1 between the radius of curvature R.sub.2 of the traction surface of the transmission roller and the radius of curvature R.sub.1 of the toroidal surfaces of the input and output discs is 0.6 or more.

Toroidal type infinitely variable transmission

A rolling bearing, comprising an inner race, an outer race and rolling members which roll therebetween, at least one of the inner and outer races being subjected to carburizing and heating treatment, is characterized in that:

Ball-and-roller bearing system

A seal plate for sealing the axial end opening between the outer ring and the inner ring of a cylindrical roller bearing includes a mandrelor core. The mandrel has a fixing portion at the peripheral part to be fitted to the outer ring, a slant portion protruding obliquely and outwardly, an intermediate portion extending from the slant portion perpendicularly to the axis, and bent portion protruding inwardly in the axial direction from the inner edge of the intermediate portion. A lip portion formed of an elastic member is bonded to the bent portion to extend in the opposite direction to the fixing portion. In the cylindrical outside surface of the flange of the inner ring, there is a step-formed portion in two steps at a position facing the bent portion and the lip portion of the mandrel of the seal plate. The bent portion is positioned close to a cutout surface (step surface) and an end face of the first step with a minute axial and a minute radial clearance to form a non-contact type sealing portion, and the inner edge of the lip portion is positioned slidingly in contact with a cutout surface of the second step to form a contact type sealing portion.

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Hiratsuka, Japan

Takaaki Shiratani