Unipres Corporation

Masamichi Miwa

Hideyuki Nezu

Ryosuke Suzuki

Nobuhiko Furuya

Toshiyuki Ichikawa

Katsuyo Fukumoto

Yosuke Sugisawa

Daichi Watanabe

Tsutomu Kaji

A clutch hub which is engaged with the clutch plates in an outer circumference is a press-molding article made from one steel sheet. In its inner circumferential surface, plural oil grooves for cooling the clutch plates, which are extended to a shaft direction and have a space in a circumferential direction. Each of dams as a press-molding portion extending to radial inward is formed at an end portion of each of the oil groove. The dams include an upright front surface and a back surface, and the bottom surfaces and both side surfaces of the oil grooves are integrated with the dams at the front surface side and the back surface side.

Cylindrical component for holding clutch plates and press molding method therefor

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

Masamichi Miwa