Rear axle supporting structure in three-wheeled motor vehicle

A rear axle supporting structure in a three-wheeled motor vehicle having a drive chain for driving two rear wheels rotatably supported at the rear end of a swing arm, the front end of which is vertically pivotably attached to a body frame of the motor vehicle, comprising:

• a pipe member fixed to the rear end of said swing arm;
• a bearing holder member rotatably fitted in said pipe member and having an eccentric bore which has an axis eccentric with respect to the axis of said pipe member;
• a rear axle for said two rear wheels, said rear axle being rotatably fitted in said eccentric bore concentrically therewith;
• a driven sprocket fixed on said rear axle and operatively cooperating with said drive chain so as to be driven thereby;
• a brake disc being fixed on said rear axle;
• a brake caliper for braking said brake disc and supported by said bearing holder member concentrically pivotably with respect to said eccentric bore of said bearing holder member;
• said brake caliper being supported by said bearing holder member through a caliper supporting member, said caliper supporting member being connected to said bearing holder member concentrically pivotably with respect to said eccentric bore of said bearing holder member;
• said caliper supporting member comprising a stay connected to said bearing holder member concentrically pivotably with respect to said eccentric bore of said bearing holder member, and at least one bracket which is connected to said stay and to which said brake caliper is connected;
• at least one said bracket being connected to said body frame of said motor vehicle through a link, said link being pivotably connected at the fore end thereof to said body frame of said motor vehicle and at the rear end thereof to said bracket;
• at least one said bracket comprising a first bracket connected to said stay and pivotably connected to said link;
• and
• at least one said bracket comprising a second bracket which is detachably connected to said first bracket and to which said brake caliper is connected.