Patent ID: 6062097
Filing Date: 2000-05-16
Classification: F16H,Y10T

Abstract:
An automatic speed-change apparatus for a gear transmission having a select-shift rod extended out thereof;said automatic speed-change apparatus connected with said select-shift rod for performing automatic shift operation of said gear transmission by converting driving force of motors into the rotational and the axial movement of said select-shift rod to transmit the movement to the shift fork of the transmission;said automatic speed-change apparatus provided with a select mechanism for performing the select operation and a shift mechanism for performing the shift operation;said select mechanism comprising a select motor rotatable forward and backward and controllable for a designated angle of rotation, gears for transmitting the rotation of said select motor comprising a select drive gear on the side of the select motor and a sectorial select driven gear formed integrally with a select shift sleeve, the select drive gear having a long gear tooth portion in the axial direction and being meshed with the select driven gear, a rotatable and axially movable select-shift sleeve having a first end and a second end, receiving the rotation and having a spherical hollow portion formed on said first end and said second end being connected coaxially with said select-shift rod; andsaid shift mechanism comprising a shift motor controllable for forward an backward rotation, a worm gear to be rotated by said shift motor, a swing gear comprising a sectorial worm wheel gear meshing with said worm gear and swinging on an intermediate shaft as a fulcrum, stoppers for controlling the swinging range of the sectorial worm wheel gear, and a connecting rod having a first end and a second end, said first end being connected with said swing gear at a peripheral portion of said swing gear by a first point member and said second end comprising a second joint member having a spherical shape and connected to said spherical hollow portion of said select-shift sleeve.