Unipres Corporation

Hideyuki Nezu

Ryosuke Suzuki

Takashi Matsuura

Ryo Shirosaki

Atsushi Kobayashi

Yutaka Murata

Masamichi Miwa

Kentaro Furukawa

Yoichi Furuichi

Daichi Watanabe

Yuta Oono

Yuuta Oono

Kazuhiro Ohta

The present invention relates to a two-stage transmission for an electrically driven vehicle including a dog clutch and a friction clutch, and an object of the present invention is to prevent a torque drop when shifting gears. The two-stage transmission for the electrically driven vehicle includes a planetary gear mechanism (), a dog clutch (), a friction clutch (), an armature () to switch between the dog clutch () and the friction clutch (), and an electromagnetic coil () to drive the armature (). In the dog clutch () and the friction clutch (), the coupling relationship among the rotational elements of the planetary gear mechanism () is set such that the dog clutch () is fastened and the friction clutch () is not fastened in speed reduction (the first speed), and the dog clutch () is not fastened and the friction clutch () is fastened in speed increase (the second speed). To prevent the torque drop when shifting the gears, a ratchet-type one-way clutch () is disposed such that a rotational phase position of the ratchet-type one-way clutch () is coincident with that of the dog clutch (). When shifting from the second speed to the first speed, since the rotational phase of the dog clutch () is adjusted by the ratchet-type one-way clutch (), the shifting is instantaneously completed without waiting operation for the phase adjustment, resulting in preventing a transmission shock.

Two-stage transmission for electrically driven vehicle

The present invention relates to a two-speed transmission for an electric driving vehicle and the two-speed transmission for an electric vehicle has only one actuator. The transmission comprises a planetary gear mechanism (), an elastic body (), an armature () to integrally rotate with an input axis, an electromagnetic coil () and a multi-plate friction clutch (). A ring gear () is fixed to a housing. The armature () comprises clutch projection portions (-). A dog clutch is constituted by the clutch projection portions (-) and recess portions (-) of a sun gear (). When the electromagnetic coil () is not electrically energized, the dog clutch is engaged. The rotation of the input axis is reduced and is transmitted to an output axis via the sun gear () and a carrier (). When the electromagnetic coil () is electrically energized, the armature () is displaced against elastic force, the dog clutch becomes a non-engaging state, a multi-plate friction clutch () becomes an engaging state by pressing flange portions (-) of the armature () and the rotation of the input axis is transmitted to the output axis with a one-to-one relationship. The transmission can comprise a one-way clutch to prevent torque interruption when switching the gear ratio.

Two-speed transmission for electric driving vehicle

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

A wet-type multi plate clutch having a obtaining hydraulic chamber, which is capable of increasing a fuel consumption efficiency by reducing a load of an oil pump for clutch oil for engaging the clutch and which realizes a simplified structure by eliminating a necessity of a canceller chamber. A disk springis, at its outer peripheral part, is supported by a clutch drumand contacts, at its inner peripheral part, with a spring presser part-of the piston. The disk springfaces, at the side opposite the piston, with clutch pack. A forward movement of the pistonby operating pressure in a hydraulic chamber is transmitted to the clutch packvia the disk spring, resulting in an engaged condition of the clutch pack. A driving force of the pistonby the hydraulic oil pressure is boosted under a lever ratio a/b of the disk springand is transmitted to the clutch pack. The disk springto the spring presser part-without obstructing the slide movement of the pistonof obtaining an increased radial length of the spring, resulting in an increased return force of the springfor a positive reverse movement of the pistonfor obtaining a disengaged condition of the clutch.

Wet multi-plate clutch

A wet-type multi plate clutch is configured to be used for a transmission in an automobile. A clutch pack is provided with a plurality of drive plates and a plurality of driven plates. The drive plates have single surfaces on which first clutch facings are fixed and opposed surfaces on which annular grooves are formed along entire peripheral lengths. The driven plates have single surfaces on which second clutch facings are fixed and opposed surfaces on which annular grooves are formed along entire peripheral lengths. The sliding surfaces of the drive plates and the driven plates are arranged between the first and second clutch facings, which are axially adjacent with each other.

Growing community of inventors

Fuji, Japan

Hideyuki Nezu