Aisin Seiki Kabushiki Kaisha

Toyota Jidosha Kabushiki Kaisha

Toyota Jidosha Kogyo Kabushiki Kaisha

Ichiro Horiuchi

Mitsufumi Nishu

Shuichiro Ida

Masanori Sato

Keiji Takeshita

Shunichi Kawai

Koji Kiryu

Kenji Takeuchi

Katsuhiko Muramatsu

Shoich Ohshima

Shoichi Ooshima

A gear type transmission comprising a casing, an input shaft supported by the casing, an output shaft supported by the casing and disposed coaxial to the input shaft, a counter shaft supported by the casing and disposed parallel to and axially offset from the input and output shafts, plural pairs of shift gears mounted on the input and counter shafts for engagement with each other, a pair of output gears on the output and counter shafts for engagement with each other, one gear of at least a low shift side of the plural pairs of shift gears fixed to the input shaft so as to rotate always simultaneously with the input shaft, the other gear of the low shift side of the plural pairs of shift gears attached to the counter shaft so as to rotate freely to the counter shaft, and a synchronized equipment mounted on the counter shaft and operating so as to make it rotate the other gear of the low shift side simultaneously with the counter shaft.

Gear type transmission

An erroneous gearshifting prevention mechanism includes a sliding lever mounted on a shift lever shaft supported on a case cover attached to a transmission case. The sliding lever has a projection including a slanted surface engageable with a reverse restriction pin rotatably and axially movably disposed in a boss integral with the case cover. When a shift lever mounted on the shift lever shaft is shifted in error from a fifth-speed gear position toward a reverse gear position, the projection is engaged by the reverse restriction pin and prevented from further movement. Any force imposed by the projection on the reverse restriction pin is directed by the slanted surface toward a relatively thick wall portion of the boss. The boss is thus protected against damage or breakage.

Mechanism for preventing erroneous reverse gear shifting in gear

A shift lever support mechanism for a transmission comprises a shift lever having a partly spherical pivot body and a distal end extending from the partly spherical pivot body for engagement with a gear shifting actuator shaft of the transmission, a retainer member adapted to be mounted on the transmission casing and having a bore accommodating the spherical pivot body therein, the retainer member including a partly spherical seat supporting the partly spherical pivot body, the retainer member having a central opening through which the distal end extends, resilient means disposed in the bore in the retainer member for normally urging the partly spherical pivot body against the partly spherical seat, and a boot mounted on the shift lever and the retainer member and defining a space therein communicating with the bore in the retainer member. The retainer member has an escape passage defined in a wall thereof adjacent to the partly spherical seat for communication between the space and the interior of the transmission casing. With this arrangement, the space in the boot and the interior of the transmission casing are equally pressurized through the escape passage. No oil is filled in the boot space and will not leak out of an air vent in the boot.

Shift lever support mechanism for transmissions

A shift mechanism for a change-speed gear transmission includes a manual gearshift lever arranged to be selectively shiftable toward forward speed-ratio and reverse-ratio positions at the same gate in a gearshift pattern, a movable member integral with a selector shaft mounted within a housing assembly of the gear transmission for both axial and rotary movement and being operatively connected to the gearshift lever to be axially moved in selecting operation of the gearshift lever toward the gate and to be rotated in shifting operation of the gearshift lever toward one of the forward speed-ratio and reverse-ratio positions. The movable member is provided with a radial lever arm arranged to be selectively movable for engagement of the forward and reverse gear ratios and provided with a radial projection which is arranged to be engaged with a recessed portion formed on one end of a spring-loaded restrict pin in shifting operation of the gearshift lever from the forward speed-ratio position toward the reverse-ratio position across the same gate to prevent an error in the shifting operation.

Shift mechanism for change-speed gear transmission

Growing community of inventors

Chiryu, Japan

Ichiro Horiuchi