Honda Motor Co., Ltd.

Kabushiki Kaisha Toshiba

Fujisawa Pharmaceutical Company, Ltd.

Hirokazu Tanaka

Yasushi Fujimoto

Taku Hirayama

Masakuni Okuhara

Takeshi Sugano

Hiroshi Hatanaka

Toru Kisaichi

Toshio Goto

Hiroyuki Makita

Tohru Kino

Tatsunori Saito

Shoichiro Yamasaki

Hiromasa Emura

A crank case structure that can reduce a front-rear dimension of the crank case to reduce the size of a power unit. A crank case structure adapted to a crank case () that houses a crankshaft (C) of a power unit (P), including a crank case cover () attached to a side surface of the crank case (), a push rod () that is disposed parallel to the crankshaft (C) and reciprocates to disengage a clutch (CL), and a clutch drive unit () that reciprocates the push rod (). A through hole (), through which the push rod () passes, is formed within an area of a sealing surface (), the sealing surface () is formed in the crank case () to attach to the crank case cover (), and the clutch drive unit () is attached to the crank case cover ().

Crank case structure

In a vehicle engine transmission apparatus, a shift spindle sensor is mounted in and extends through a through spindle sensor mount hole defined in a spindle sensor mount seat formed on a portion of a case, and a shift drum sensor is mounted in and extends through a through drum sensor mount hole defined in a drum sensor mount seat formed on a portion of the case. The direction in which the shift spindle sensor is mounted and the direction in which the shift drum sensor is mounted are same as each other. The shift spindle sensor and the shift drum sensor can be easily attached to and detached from their mount seats and can be well serviced for excellent maintainability, and the mount seats can be machined with ease and excellent machinability.

Transmission apparatus

A transmission casesupports a shift shaftthat constitutes a part of a speed change operation mechanism, and which receives an operating input and transmits a speed change motion of a transmission. A part of a transmission holderM in which part the shift shaftis disposed includes a shaft insertion opening portionthat the shift shaftis disposed so as to pass through.

Transmission structure for vehicle

A shift fork shafthas both end portions movably fitted in shaft supportsandof a gear transmission. Clearances are left between bottom surfacesandof the shaft supportsandand both end facesof the shift fork shaft. Capsare mounted in both axial ends of the shift fork shaft

Vehicular gear transmission structure

Growing community of inventors

Wako, Japan

Hirokazu Tanaka