Patent ID: 6468186
Filing Date: 2002-10-22
Classification: A63B

Abstract:
An adjustable magnetic damping device installed in a flywheel supported on a fixed shaft of a stationary bicycle, said flywheel comprising a solid wheel body and metal lining fastened to the wheel body and defining a receiving chamber adapted to hold the magnetic damping device, the magnetic damping device comprising:a left cover shell, said left cover shell comprising a first circular flange protruded from an inner side thereof, a second circular flange protruded from the first circular flange of said left cover shell, a pivot hole at the center of the second circular flange of said left cover shell, which receives the fixed shaft of the stationary bicycle, a plurality of parallel guide blocks disposed at the inner side and equiangularly spaced around the first circular flange of said left cover shell, and a plurality of mounting posts disposed at the inner side and equiangularly spaced around the border area of said left cover shell; a plurality of adjustment members, said adjustment members each comprising a sector-like base, a plurality of rails extended from said sector-like base and inserted in between the guide blocks of said left cover shell, and a wedge-like push block; a plurality of smoothly arched magnets respectively fixedly fastened to said adjustment members at an outer side to attract the metal lining of said flywheel; a cam wheel, said cam wheel comprising a circular center opening coupled to the second circular flange of said left cover shell, a plurality of blades formed integral with one another around said circular center opening and respectively attached to the push block of each of said adjustment members, and a pull cable holder; a right cover shell, said right cover shell comprising a first circular flange protruded from an inner side thereof, a second circular flange protruded from the first circular flange of said right cover shell and inserted into the circular center opening of said cam wheel in contact with the second circular flange of said left cover shell, a pivot hole at the center of the second circular flange of said right cover shell, which receives the fixed shaft of said stationary bicycle, a plurality of parallel guide blocks disposed at the inner side and adapted to guide radial movement of said adjustment members, a plurality of mounting posts disposed at the inner side and respectively fastened to the mounting posts of said left cover shell by fastening elements, and a wire slot formed in the first circular flange of said right cover shell for the insertion of a pull cable for enabling the pull cable to be fastened to the pull cable holder of said cam wheel.