Unipres Corporation

Nissan Motor Company Limited

Jatco Corporation

Nobuhiko Furuya

Takumi Watanabe

Yasuhiro Ishikawa

Masamichi Miwa

Mitsuyoshi Tako

Ryuta Mori

Katsuyo Fukumoto

Daisuke Nakahara

Yosuke Sugisawa

Koshi Asao

Toshiyuki Ichikawa

Tsutomu Kaji

Daisuke Usui

The present invention relates to a lock-up clutch of a torque converter. A cover () is separated to a pilot () and includes an opening (-) for installing the pilot (). Before assembling a clutch driving portion such as a piston, a separator, drive plates, a seal ring, and driven plates, to the pilot (), rivets () are press-fitted into the pilot (), the cover () is abutted to respective head portions of the rivets (), and the pilot () is installed in the cover () and is fixed to the cover () by welding. Thereafter, the piston, the drive plates and the driven plates are disposed between the separator and the cover (), the seal ring is contact with the separator, the separator is press-fitted into projection ends of the rivets (), and then projection portions (-) of the rivets () are crimped.

Lock-up clutch for torque converter

The present invention relates to relates to an improvement of a dividing wall for a primary pulley in a belt-type continuously variable transmission. It is an object of the present invention to obtain a desired strength characteristic without performing a soft nitriding treatment and achieve cost reduction. A hydraulic pressure chamber is formed between the dividing wall and the movable sheave, and the dividing wall comprises a small-diameter annular disc portionextended from the central cylinder portion, which is attached to a rotational shaft, in a radial direction. In the small-diameter annular disc portion, a connecting portion which is connected to an intermediate body portionis a bent portionwhich is bent at substantially 90 [deg]. In a cross-section of an inner peripheral surface of the bent portion, the inner peripheral surface of the bent portionis constituted by an inner radius side arc-whose origin position is Oand curvature radius is R, an outer radius side arc-whose origin position is O, which is a different position from the origin position Oof the inner radius side arc-, and curvature radius is R, which is a different value from the curvature radius Rof the inner radius side arc-, and an intermediate portion-that the inner radius side arc-is smoothly connected to the outer radius side arc-. By adopting the above shape, when a load is applied to the dividing wall, a stress value at a concave surfacecan be reduced, and desired durability can be obtained without performing the soft nitriding treatment and achieve cost reduction.

Dividing wall for primary pulley in belt-type continuously variable transmission

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Fuji, Japan

Nobuhiko Furuya