Abstract: The power transmission apparatus for a vehicle has a main shaft having drive gears mounted thereto and a countershaft having driven gears mounted thereto, and the respective shafts are attached to a case. A reverse shaft attached to the case has an idler gear for reverse operation or a reverse idler gear rotatably attached thereto which is engaged with a drive gear for reverse operation and a driven gear for reverse operation. The reverse shaft has a projection which is integrally formed thereon and is in contact with one side surface of the reverse idler gear, and has a washer mounted thereto which is in contact with the other side surface of the reverse idler gear.

Abstract: A one-way clutch includes an inner race, an outer race driven in a specific direction and provided with a plurality of pockets in its inner circumference facing the outer circumference of the inner race and threaded attachment holes to be used for attaching a driven member to the outer race, rollers respectively placed in the plurality of pockets, and elastic members pressing the rollers in a specific direction. A center angular interval between the middle pocket in any three successive ones of the pockets and the adjacent pocket on the forward side of the middle pocket, and an center angular interval between the middle pocket and the adjacent pocket on the backward side of the middle pocket are different from each other. Thus the distance between the front end surface of the pocket and the threaded attachment hole on the forward side of the pocket can be sufficiently large, and reduction of the rigidity of the outer race can be prevented without increasing the diameter of the outer race.

Abstract: The power transmission apparatus for a vehicle has a main shaft having drive gears mounted thereto and a countershaft having driven gears mounted thereto, and the respective shafts are attached to a case. A reverse shaft attached to the case has an idler gear for reverse operation or a reverse idler gear rotatably attached thereto which is engaged with a drive gear for reverse operation and a driven gear for reverse operation. The reverse shaft has a projection which is integrally formed thereon and is in contact with one side surface of the reverse idler gear, and has a washer mounted thereto which is in contact with the other side surface of the reverse idler gear.

Abstract: A one-way clutch of the invention includes an inner race supported for rotation on a power transmission shaft, an outer race concentrically surrounding the inner race, and torque transmitting members interposed between the inner race and the outer race and capable of transmitting torque in one direction of the inner race to the outer race. The outer race is integrally provided with an extending portion that extends inwardly in a radius direction thereof. The extending portion is capable of being engaged with the power transmission shaft.

Abstract: A one-way clutch comprises an inner race (2), an outer race (3) driven in a specific direction and provided with a plurality of pockets (4) in its inner circumference facing the outer circumference of the inner race (2) and threaded attachment holes (3a) to be used for attaching a driven member to the outer race (3), rollers (5) respectively placed in the plurality of pockets (4), and elastic members (6) pressing the rollers (5) in a specific direction. An center angular interval between the middle pocket (4) in any three successive pockets (4) among the plurality of pockets (4) and the adjacent pocket (4) on the forward side of the middle pocket (4), and an center angular interval between the middle pocket (4) and the adjacent pocket (4) on the backward side of the middle pocket are different from each other.

Abstract: A one-way clutch of the invention includes an inner race supported for rotation on a power transmission shaft, an outer race concentrically surrounding the inner race, and torque transmitting members interposed between the inner race and the outer race and capable of transmitting torque in one direction of the inner race to the outer race. The outer race is integrally provided with an extending portion that extends inwardly in a radius direction thereof. The extending portion is capable of being engaged with the power transmission shaft.