Motorcycle combination brake rotor and belt pulley assembly

A belt pulley for use with a motorcycle having a rear wheel rotating on an axle in response to a drive belt or a drive chain, and having a rear disk brake rotor in the shape of an annular ring and a disk brake caliper, the belt pulley comprising:

• a body in the shape of a thick annular ring with
• a circumferential flange extending transversely substantially to one side of the annular ring, with
• an exterior surface to the transversely-extending circumferential flange which surface is suitably contoured so as to engage the drive belt or the drive chain,
• wherein the axle passes through a central aperture of the annulus while the drive belt or the drive chain engages the outer surface of the circumferential flange;
• first mounting means for affixing the rear wheel to the body's thick annular ring with the body's transverse circumferential flange extending oppositely to the wheel, wherein a rotation of the body by the drive belt of the drive chain also serves to co-rotate the wheel;
• and
• second mounting means, located near the circumferential flange of the body in a position not interfering with the engagement of the drive belt or the drive chain by the outer surface of this flange, for affixing the body at and to an outer circumferential portion of the annular rotor whereupon a remaining, interior, portion of the rotor extends substantially spaced parallel to the body's annular ring;
• wherein the disk brake caliper suitably positioned and oriented can engage the interior portion of the rotor.

A combination disk brake rotor and belt pulley for a motorcycle also having (i) a frame, (ii) a wheel rotating relative to the frame, and (iii) a disk brake caliper that is affixed to the frame and activated during braking, the combination disk brake rotor and belt pulley comprising:

• a disk brake rotor having a body in the shape of an annular ring
• with a peripheral circumferential region of the annulus having and presenting features that are suitable to stably affix an external structure for imparting rotation to the body, while
• an interior region to the annulus that is pressured against the disk brake caliper during braking so as to retard rotation of the body relative to the frame;
• wherein the disk brake rotor is distinguished in that its annular body is engaged and affixed for rotation at its peripheral region while its annular body is pressured against the disk brake caliper at its interior region to retard rotation during braking;
• and
• a belt pulley affixed to both (i) the peripheral circumferential region of the annulus of the disk brake rotor body by action of the features present at this region, and, also, (ii) to the wheel of the motorcycle for co-rotation therewith.

A rear wheel drive and brake apparatus for a motorcycle having (i) a frame, (ii) a belt or chain drive, (ii) a wheel rotating on (iv) an axle in response to the belt or chain drive, and (v) a suspension swing arm pivotally mounting the axle to the frame, the drive-and-brake apparatus comprising:

• 1) a combination belt pulley and disk brake rotor assembly including
• 1.1) a belt pulley having
• 1. 1.1) a circular plate region suitably affixed to the wheel in position about the axle for rotation concentrically therewith, and
• 1.1.2) a transversely-extending peripheral flange region having a circumferential exterior surface suitably contoured so as to engage the drive belt or chain,
• wherein a wheel affixed to the belt pulley may be rotated upon and about the axle under force of the drive belt or chain,
• a volume of the belt pulley within its peripheral flange being at least partially vacant, and
• 1.2) a disk brake rotor in the shape of an annular ring, the exterior circumference of the annulus being affixed to the peripheral flange region of the belt pulley;
• and
• 2) a disk brake caliper having and defining (i) at a one end portion an aperture through which passes the axle, and (ii) at another end portion a feature that attaches the suspension swingarm, and (iii) a central yoke through which passes the rotating disk brake rotor.

For use with a vehicle having (i) a frame, (ii) a belt or chain drive means, (iii) a wheel rotating on an axle in response to the belt or chain drive means, and (iv) a disk brake caliper mounted to the frame, a combination belt pulley and disk brake rotor assembly comprising:

• a belt pulley means, (1) having an exterior circumferential surface engaging the belt or chain drive means and (2) affixed to the wheel for rotation therewith, for, in response to force communicated by the belt or chain drive means, inducing rotation of the wheel, the belt pulley means having and defining within at least a portion of its interior a hollow volume;
• and
• a disk brake rotor in the shape of an annular ring located at least partially within the hollow volume of the belt pulley means, the rotor affixed at an exterior region of its annulus to the belt pulley means for rotation therewith while engaging at an interior region of its annulus the disk brake caliper;
• wherein pressured engagement of the brake caliper to the disk brake rotor during braking of the vehicle retards rotation of the wheel relative to the frame.

For use with a vehicle having (i) a frame, (ii) a belt drive, (iii) a wheel rotating on an axle in response to the belt drive, and (iv) a disk brake caliper mounted to the frame, a combination belt pulley and disk brake rotor assembly comprising:

• a belt pulley having
• a central plate region affixed to the wheel about the axle for rotation with the wheel,
• a hollow interior circular pulley engaging the belt drive, and
• means for connecting the central plate region to an interior of the circular pulley,
• the belt pulley having and defining a void in at least a portion of the region interior to its circular pulley nonetheless to the means for connecting;
• and
• a disk brake rotor in the shape of an annular ring located at least partially within the void of the belt pulley;
• and
• means for affixing an exterior annular region of the brake rotor to the belt pulley for rotation therewith;
• wherein the mounting of the disk brake caliper to the frame permits the caliper to engage and pressure against the annular rotor at an interior region of its annulus during breaking of the vehicle, retarding rotation of the wheel relative to the frame.