Frame-type leg lifting machine with steady pedaling and swinging

Abstract

A frame-type leg lifting machine includes a main frame unit for mounting two driving leg swing arm assemblies, two pedals, a swinging assembly, a magnetic resistance mechanism, and a speed ratio adjustment mechanism. The speed ratio adjustment mechanism is linked between the swinging assembly and the magnetic resistance mechanism. Each of the driving leg swing arm assemblies includes a main leg swing arm and an auxiliary leg swing arm. Upper ends of the main leg swing arm and the auxiliary leg swing arm are pivotally mounted on the main frame unit to serve as pivoting fulcrums, so that the driving leg swing arm assemblies swing within the main frame unit. Each of the pedals has a front section and a rear section pivotally connected with lower ends of the auxiliary leg swing arm and the main leg swing arm.

1 . A leg lifting machine comprising:
 a main frame unit, two driving leg swing arm assemblies, two pedals, a swinging assembly, a magnetic resistance mechanism, and a speed ratio adjustment mechanism;   wherein:   the main frame unit includes a lower base frame, two side supporting frames, two front upright frames, and two rear upright frames;   the two front upright frames and the two rear upright frames are respectively connected between two sides of the lower base frame and front and rear sections each of the two side supporting frames;   a front fixing frame is transversely connected to a front section of the lower base frame;   a rear fixing frame is transversely connected to a rear section of the lower base frame;   a first pivot frame and a second pivot frame are longitudinally connected between a front end of the lower base frame and the front fixing frame;   the first pivot frame and the second pivot frame are spaced from each other;   each of the two driving leg swing arm assemblies includes a main leg swing arm and an auxiliary leg swing arm;   upper ends of the main leg swing arm and the auxiliary leg swing arm are respectively and pivotally mounted on each of the two rear upright frames and each of the two side supporting frames to serve as pivoting fulcrums, and swing in alternating forward and backward arcuate trajectories within the main frame unit;   a pivotal connection portion extends from the upper end of the main leg swing arm;   the pivotal connection portion is pivotally connected downward to an upper end of a first driven member;   the first driven member has a lower end pivotally connected to a first end of a rear swing member;   the rear swing member is pivotally mounted on each of the two rear upright frames;   each of the two pedals has a front section pivotally connected with a lower end of the auxiliary leg swing arm and a rear section pivotally connected with a lower end of the main leg swing arm;   the swinging assembly at least includes a transverse swing base, two linking members, two bottom rods, two front swing members, and a rotating spindle;   the transverse swing base is swingably and pivotally mounted on the rear fixing frame;   the transverse swing base has two ends respectively and pivotally connected to a first end of each of the two linking members;   each of the two linking members has a second end pivotally connected to the rear swing member;   each of the two bottom rods has a rear end respectively and pivotally connected to a second end of the rear swing member;   each of the two bottom rods has a front end pivotally connected to a first end of one of the two front swing members;   each of the two front swing members has a second end axially and pivotally dispose the rotating spindle;   the magnetic resistance mechanism is assembled at the front section of the lower base frame and provides resistance to the swinging assembly;   the magnetic resistance mechanism at least includes a rotatable magnetic resistance wheel;   the magnetic resistance wheel has an axis provided with a pivot wheel;   the speed ratio adjustment mechanism is assembled at the front section of the lower base frame and linked between the swinging assembly and the magnetic resistance mechanism, to adjust a ratio of resistance rotational speed;   the speed ratio adjustment mechanism includes a first transmission module, a second transmission module, and a third transmission belt;   the first transmission module includes a rotatable first pulley and a first transmission belt;   the first pulley has an axis provided with a first pivot wheel;   the first pulley and the first pivot wheel are respectively and pivotally mounted on two different sides of the first pivot frame;   the second transmission module includes a rotatable second pulley and a second transmission belt;   the second pulley has an axis provided with a second pivot wheel;   the second pulley and the second pivot wheel are respectively and pivotally mounted on two different sides of the second pivot frame;   the first transmission belt is commonly wound around the pivot wheel of the magnetic resistance wheel and the first pulley;   the second transmission belt is commonly wound around the first pivot wheel and the second pulley; and   the third transmission belt is commonly wound around the second pivot wheel and one end of the rotating spindle.   
     
     
         2 . The leg lifting machine as claimed in  claim 1 , wherein the main frame unit further includes a front bracket connected between the front sections of the two side supporting frames, a placement rack mounted on the front bracket, and two handlebar frames mounted on the two side supporting frames respectively. 
     
     
         3 . The leg lifting machine as claimed in  claim 1 , further comprising:
 two handlebar swing arms mounted on two sides of the lower base frame; and   two transverse driven rods connected with the two handlebar swing arms respectively;   wherein:   each of the two handlebar swing arms has a lower end pivotally mounted on the lower base frame;   each of the two transverse driven rods has a first end pivotally connected to a middle section of one of the two handlebar swing arms and a second end pivotally connected to the pivotal connection portion of the main leg swing arm;   the main frame unit further includes two first covering members mounted on the two side supporting frames respectively and covering the two transverse driven rods respectively; and   each of the two first covering members is longitudinally formed with a slot allowing passage and swinging of each of the two handlebar swing arms.   
     
     
         4 . The leg lifting machine as claimed in  claim 1 , wherein:
 the upper end of the first driven member is pivotally connected to a first pivotal connection member;   the lower end of the first driven member is pivotally connected to a second pivotal connection member;   the first pivotal connection member is pivotally connected to the pivotal connection portion of the main leg swing arm; and   the second pivotal connection member is pivotally connected to the first end of the rear swing member.   
     
     
         5 . The leg lifting machine as claimed in  claim 1 , wherein the first driven member is a rod. 
     
     
         6 . The leg lifting machine as claimed in  claim 1 , wherein the first driven member is a cable. 
     
     
         7 . The leg lifting machine as claimed in  claim 1 , wherein the front fixing frame is provided with two pivot ears, and the two pivot ears and the two front swing members pivotally dispose the rotating spindle. 
     
     
         8 . The leg lifting machine as claimed in  claim 1 , wherein the main frame unit further includes a front cover plate covering the magnetic resistance mechanism, a rear cover plate covering the swinging assembly, and two second covering members respectively covering the two rear upright frames, and the front cover plate and the rear cover plate are mounted on the lower base frame. 
     
     
         9 . The leg lifting machine as claimed in  claim 1 , further comprising:
 a swingable lifting frame pivotally connected to a bottom of the lower base frame; and   a lifting mechanism connected between the lower base frame and the lifting frame;   wherein the lifting mechanism links and drives the lifting frame to swing, thereby causing the lower base frame to change different inclination angles.