Yutaka Giken Co., Ltd.

Honda Motor Co., Ltd.

Akira Kitajima

Tokuji Yoshimoto

Hiroya Abe

Tomoya Okaji

Tomohiko Tsuchiya

Yoshitaka Mishima

Tomohiko Usui

Yoshihisa Yamamoto

Among first and second stators of a torque converter supported on a fixed part by a one-way clutch corresponding to the stators, the number of second stator blades of the second stator on the downstream side in the direction of flow of oils larger than the number of first blades of the first stator on the upstream side, and the maximum value tfor blade thickness of the second stator blade is smaller than the minimum value tfor blade thickness of the first stator blade. Therefore, it is possible to ensure that there is a sufficient gap (&#x3b2;) between a trailing edge of the first stator blade and a leading of the second stator blade, thus preventing the flow of oil from being stopped by the gap (&#x3b2;), and it is possible to align effectively the flow of oil by means of the second stator blades.

Torque converter stator structure

In a fluid transmission device, a male fitting surface of a periphery of a diameter-expanded portion of a pump shell is fitted to a female fitting surface of an inner circumference of a peripheral wall portion of a cylindrical transmission cover, and a fillet weld being is formed between an end surface of the peripheral wall portion and a peripheral surface of the diameter-expanded portion along an entire circumference, thereby connecting together the pump shell and the transmission cover. An annular recess is formed in an inner circumferential surface of the peripheral wall portion to adjoin the female fitting surface on the side opposite from the fillet weld. A portion of the transmission cover corresponding to the recess constitutes an annular thin-walled portion which has a thickness smaller than the portions of the transmission cover along the opposite sides of the annular thin wall portion. Therefore, even if the diameters of the pump shell and the transmission cover are increased, the durability of the pump shell and the transmission cover can be improved by alleviating excessive stress concentration on the fillet weld between the pump shell and the transmission cover.

Fluid transmission device

Growing community of inventors

Hamamatsu, Japan

Akira Kitajima