Switching device for switching driving force between forward and reverse directions

A switching device for switching driving force between forward and reverse directions, said device comprising a fixed shaft (11), an input gear (14) and an output gear (15) fitted on the fixed shaft (11) so as to face each other, a switching mechanism (10) disposed between said input gear and said output gear, said switching mechanism (10) being configured to transmit driving torque applied to said input gear (14) to said output gear (15) to selectively rotate said output gear (15) in one of two opposite directions,

• wherein said switching mechanism (10) comprises an input bevel gear (16) integral with said input gear (14), an output bevel gear (17) integral with said output gear (15), an intermediate shaft (12) fitted on the fixed shaft (11), support shafts (13) extending from said intermediate shaft (12) perpendicular to the intermediate shaft (12), intermediate bevel gears (22) supported on the respective support shafts (13) and meshing with said input bevel gear (16) and said output bevel gear (17), a one-way clutch disposed between the intermediate shaft (12) and the input bevel gear (16), and a control means for selectively locking and unlocking said one-way clutch, and
• wherein said one-way clutch includes an adaptor portion (30, 57) fitted to the intermediate shaft (12), and coupled to the intermediate shaft (12) through a complementary coupling structure.