Weight-adjustable dumbbell component

A weight-adjustable dumbbell component, comprising a dumbbell base, a plurality of dumbbell plates arranged on the dumbbell bases, and a dumbbell bar assembly for mounting the dumbbell plates, wherein the dumbbell bar assembly comprises a rotating shaft and a handle tube sleeved at the middle of the rotating shaft;

• an end face of the rotating shaft is in a large cut circle shape, and two ends of the rotating shaft are sequentially sleeved with the following parts:
• hollow inserting plates for fitting and fixing the dumbbell plates and symmetrically arranged at two sides of the handle tube, wherein the hollow inserting plates are provided with open grooves for assembling and disassembling the dumbbell plates;
• and
• limiting mechanisms, for limiting rotation of the rotating shaft and arranged at outer sides of the hollow inserting plates, wherein inserting holes are formed at the peripheries of the limiting mechanisms, and abutting bumps fitted with the inserting holes are arranged at two ends of the dumbbell base;
• wherein the limiting mechanisms are unlocked when the abutting bumps extend into the inserting holes, and various dumbbell plates are sequentially assembled on and disassembled from the hollow inserting plates through the rotation of the rotating shaft;
• and the limiting mechanisms are locked when the abutting bumps are separated from the inserting holes, and the limiting mechanisms are configured to limit relative rotation of the rotating shaft.