TRANSMISSION SHIFT DEVICE

摘要

A transmission shift device includes a rotary shaft rotationally connected to an input shaft of a transmission, first and second clutch rings rotationally connected to an output shaft of the transmission at a first gear ratio and a second gear ratio, respectively, a clutch hub fixed to the rotary shaft between the first clutch ring and the second clutch ring, a sleeve restricted a relative rotation with the clutch hub and movably engaged with the rotary shaft in the axial direction, first and second dog clutch portions projected from respective side surfaces of the first and second clutch rings and engageably and disengageably meshing with sleeve spline formed at the sleeve, and an elastic member positioned between the clutch hub and the sleeve and restricting a movement of the sleeve in the axial direction in each of a neutral state, a first shift state and a second shift state.

主权项

1. A transmission shift device, comprising:
a rotary shaft rotationally connected to an input shaft of a transmission and rotatably supported about an axis of the rotary shaft; a first clutch ring rotatably supported to the rotary shaft and rotationally connected to an output shaft of the transmission at a first gear ratio; a second clutch ring rotatably supported to the rotary shaft and rotationally connected to the output shaft of the transmission at a second gear ratio; a clutch hub being fixed to the rotary shaft between the first clutch ring and the second clutch ring; a sleeve being restricted a relative rotation with the clutch hub and movably engaged with the rotary shaft in the axial direction; a first dog clutch portion being projected from a side surface of the first clutch ring to face the sleeve and engageably and disengageably meshing with a sleeve spline formed at the sleeve in response to a shaft drive of the sleeve; a second dog clutch portion being projected from a side surface of the second clutch ring to face the sleeve and engageably and disengageably meshing with the sleeve spline formed at the sleeve in response to the shaft drive of the sleeve; a shaft drive device moving the sleeve in the axial direction; and an elastic member being positioned between the clutch hub and the sleeve and restricting a movement of the sleeve in the axial direction in each of a neutral state where the sleeve spline does not mesh with the first dog clutch portion and the second dog clutch portion, of a first shift state where the sleeve spline meshes with the first dog clutch portion, and of a second shift state where the sleeve spline meshes with the second dog clutch portion; wherein the elastic member includes a first engaging portion and a second engaging portion and is fixed at one of an inner circumferential surface of the sleeve and an outer circumferential surface of the clutch hub, and a first engaged portion and a second engaged portion are provided at the other one of the inner circumferential surface of the sleeve and the outer circumferential surface of the clutch hub; the first engaging portion engages with the first engaged portion while the second engaging portion engages with the second engaged portion in the neutral state; the first engaging portion engages with the second engaged portion in the first shift state; and the second engaging portion engages with the first engaged portion in the second shift state.