Abstract: A select mechanism for executing select operation and a change speed mechanism for executing change speed operation are incorporated into the automatic speed-change apparatus. The change speed mechanism is provided with a change speed motor 14 capable of controlling forward and backward rotation, a single or a plurality of intermediate shaft gear mechanisms 16 reducing and then transmitting the speed of the rotation of the speed change motor and each consisting of a large diameter gear 17, a small diameter gear 18 and an intermediate shaft 19 parallel to a select and change speed pull-rod 2, a change speed gear 24 engaged with the intermediate shaft gear mechanisms to transmit rotation and fixed to the select and change speed pull-rod 2, and a change speed sensor 28 provided on the outer end of the select and change speed pull-rod 2 and detecting the operating angle of the pull-rod 2 in rotation direction.

Abstract: The object is to provide a compact speed-change apparatus for performing the automatic gear shifting of the conventional gear transmission.In this apparatus the select mechanism comprises a select motor 2 rotatable forward and backward, gears 4, 6 for transmitting the rotation of the select motor 2, and a select-shift sleeve 7 receiving the rotation and one end of which is connected with a select-shift rod 9 of the gear transmission; and the shift mechanism comprises a shift motor 10, a gear 12 to be rotated by the shift motor 10, a swing gear 13 meshing with the gear 12 and swinging on an intermediate shaft 14 as a fulcrum, and a connecting rod 16 one end of which is connected with the swing gear 13 and the other end of which is connected with said select-shift sleeve 7.

Abstract: An automatic clutch operating control apparatus which can rapidly perform the disconnection of a friction clutch of a transmission by the assistance of the accumulated load in a coil spring. Comprising a motor 4 rotatable forward and backward; reduction means 27, 23 for reducing the rotation of the motor 4; movement conversion means 19, 21, 15, 9 for converting the rotation of the motor to the axial movement of a piston rod 6; a hydraulic master cylinder 3 including the piston rod 6 for supplying working oil into a friction clutch to compress the spring in the clutch so that the clutch will be disconnected; a coil spring 31 provided on the piston rod 6 of the hydraulic master cylinder 3 so as to accumulate the load by the compression due to the repulsive force of the spring in the clutch when the motor 4 is rotated backward to connect the clutch and so as to release the accumulated load when the motor 4 is rotated forward.

Abstract: An automatic operating apparatus for a friction clutch is disclosed which apparatus performs the disconnection of the clutch of a transmission by the assistance of the accumulated load in a load accumulator which can perform the accumulation and the release of the load by a simple mechanism. In the automatic clutch operating apparatus having a reducer 9, 13 to reduce the forward rotating force of a motor 1 and a movement converter 10, 12 to make a piston rod 4a of a hydraulic master cylinder 2 move in the axial direction so as to disconnect the friction clutch, a link mechanism is constructed for accumulating the loads due to the rotating force of the motor 1 and the repulsive force of the clutch spring in the load accumulator 16, 18 when the motor 1 is rotated backward to connect the friction clutch and for releasing the accumulated loads when the motor 1 is rotated forward to disconnect the clutch.

Abstract: The object is to provide a small-sized speed-change apparatus for performing the automatic gear shifting of the conventional gear transmission. In the speed-change apparatus 1, the select mechanism comprises a select motor 6 controllable for forward and backward rotation, gears 7, 8 for transmitting the rotation, a select-shift shaft 11 to be rotated forward and backward through said gears 7, 8 and connected with the select-shift rod 5 of the gear transmission M; and the shift mechanism comprises a piston 12 for moving the select-shift shaft 11 in the axial direction, hydraulic chambers 13, 14 accommodating the piston 12 and a shift-operating hydraulic-pressure generator for supplying the hydraulic oil through hydraulic tubes into the hydraulic chambers 13, 14.

Abstract: An automatic clutch control apparatus which can rapidly perform the disconnection of a friction clutch of a transmission by the assistance of the accumulated load in a coil spring comprising a motor 4 rotatable forward and backward; reduction means 27, 23 for reducing the rotation of the motor 4; movement conversion means 19, 21, 15, 9 for converting the rotation of the motor to the axial movement of a piston rod 6; a hydraulic master cylinder 3 including the piston rod 6 for supplying working oil into a friction clutch to compress a spring in the clutch so that the clutch will be disconnected; a coil spring 31 provided on the piston rod 6 of the hydraulic master cylinder 3 so as to accumulate the load by the compression due to the repulsive force of the spring in the clutch when the motor 4 is rotated backward to connect the clutch and so as to release the accumulated load when the motor 4 is rotated forward.

Abstract: A speed-change apparatus for satisfactorily performing the automatic gear shifting of the conventional gear transmission by controlling two motors comprises a select mechanisms including a stepping-motor 2, a select shaft provided with a select gear meshing with a motor gear 3 for transferring the rotation, a device for connecting the select shaft with the select-shift rod of the gear transmission, and a select sensor 6 for detecting an angle of rotation of the select shaft; the shift mechanism comprises a shift motor 9, an intermediate shaft 12, an actuator gear 11 meshing with a motor gear 10 for transferring rotation, a long actuator gear 13 provided on the periphery of the intermediate shaft 12, a shift shaft provided with a male screw 15, a cylindrical slider 17 with a female screw 16 meshing with the male screw 15 a shift gear 14 meshing with the long actuator gear 13, a mechanism coupled with the slider 17 for connecting the slider 17 with the select-shift rod, and a stroke sensor 19 for detecting an a