Patent ID: 8152701
Filing Date: 2012-04-10
Classification: A63B

Abstract:
1. An improved counterweight module structure of a weight trainer, wherein said counterweight module is assembled at a preset load of a weight trainer, and used to provide the counterweight and adjust the weight required for weight training; said counterweight module comprising: two vertical guide rods, arranged vertically by spaced parallel; a bottom counterweight block, assembled transversely at lower part of two vertical guide rods; the bottom counterweight block is provided with two spaced sleeving holes for sleeving into two vertical guide rods; a top counterweight block, assembled transversely onto two vertical guide rods overhead the bottom counterweight block; the top counterweight block is provided with two spaced punch holes for sleeving into two vertical guide rods; at least an intermediate counterweight block, superimposed transversely between the bottom and top counterweight blocks; and a pin threading portion is set laterally onto every intermediate counterweight block; a liner ring assembly, only assembled onto the bottom and top counterweight blocks; the liner ring assembly includes upper liner rings set into two punch holes of the top counterweight block, and lower liner rings set into two sleeving holes of the bottom counterweight block; and the annular rings of upper and lower liner rings are mated slidably with two vertical guide rods; and a guide rod pulling portion, set vertically onto every intermediate counterweight block for penetration of the vertical guide rod; there is a spacing between the guide rod pulling portion and vertical guide rod; a mating portion, arranged between the bottom and intermediate counterweight blocks, or between the intermediate counterweight blocks, or between the intermediate and top counterweight blocks, so that the intermediate counterweight blocks can be limited to avoid displacement; an actuating column through-hole, arranged correspondingly at middle of the bottom, top and intermediate counterweight blocks; a lifting actuator, including a lifting actuating column and a locating pin, of which the lifting actuating column penetrates vertically the actuating column through-holes of the bottom, top and intermediate counterweight blocks; and pin holes are arranged vertically at interval onto the lifting actuating column correspondingly to the pin threading portion of every intermediate counterweight block; the locating pin can be selectively inserted into the pin threading portion of either intermediate counterweight block and pivoted into the corresponding pin hole of the lifting actuating column, allowing to adjust the weight for weight training.