Honda Giken Kogyo Kabushiki Kaisha

Yoshinobu Edure

Shigeru Koyama

Hiroyuki Makino

Teruhisa Kidokoro

In a transmission gear shift system for automobiles, a first spring seat and a second spring seat are supported in a slidable manner between a first stopper surface and a second stopper surface which are provided on a shift select shaft with a gap between them in the axial direction. The inner surfaces in the axial direction of the first and second spring seats are forced by a select spring in the direction in which they move away from each other to come into contact with the first and second stopper surfaces respectively. The outer surfaces in the axial direction of the first and second spring seats, are supported on first and second support surfaces respectively provided in a transmission case. Thus, it is possible to reduce the number of select springs required for maintaining the shift select shaft in a central select position and to shorten the overall length of the shift select shaft.

Transmission gear shift system

In a transmission for automobiles, the shift feeling is improved by smoothly transferring the operational load between a shift rod and a reverse shift fork. This is accomplished by cam faces formed on a reverse shift fork which shifts a reverse idle gear between a neutral position and a reverse position, and cam faces are formed on a drive cam which moves integrally with a shift rod. When the drive cam is moved from a neutral position to the reverse position, one of the cam faces presses against another of the cam faces moving the reverse shift fork in a circular manner in an anticlockwise direction, and the reverse idle gear moves to the reverse position. When the drive cam member is moved from the reverse position to the neutral position, another of the cam faces presses against still another of the cam faces moving the reverse shift fork in a circular manner in a clockwise direction, and the reverse idle gear moves to the neutral position.

A transmission breather system is provided in which a subassembly is formed by supporting a shift select shaft, moving in the axial direction according to a select operation of a shift lever, and a select spring, maintaining the shift select shaft in a neutral position, on a cover member. Moreover, a breather chamber is formed between the cover member and an indentation of a transmission case by inserting the shift select shaft into an opening formed on the bottom wall of the indentation of the transmission case to connect the cover member to the transmission case, and the select spring is housed in the breather chamber. Thus, with regard to the transmission breather system, it is possible to form a breather chamber whose maintenance is easy while avoiding an increase in the size of the transmission case.

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Saitama, Japan

Yoshinobu Edure