Elliptical exercise machine

Abstract

An elliptical exercise machine in which a raise angle of an elliptical path can be adjusted consists of a foot base, a pair of arms, a pair of foot pedaling members, and a raise angle member. When handle parts are held by hands, an opposite exercise can be taken by a left and right grip pole, as the arms are coupled to pedal rods, and a roller slides on a link rod. When both feet step on pedals, the pedal rods will slide on the link rods which drive a pulley to operate, by a function of the foot pedaling members, to achieve a purpose of workout. Furthermore, by using the raise angle member, the pedal rods and the link rods will have a change of raise angle, and the raise angle of the elliptical path is adjusted.

1 . An elliptical exercise machine comprising:
 a foot base, which is put up on a floor, and is provided with a front underframe and a rear underframe, with the front underframe being extended with an upright post, a pulley being disposed on the aforementioned post, and left and right sides of the pulley being provided respectively with a crank;   a pair of left and right arms, which is disposed at two sides of the aforementioned post, with an upper end of each of the left and right arms being a handle part to be held by a user;   a pair of left and right foot pedaling members, each including a link rod, a pedal rod, and an adjustment rod, with an end of the aforementioned link rod being pivoted on the aforementioned crank, a rear end being provided with a frame seat on which is disposed with a movable roller, an end of the adjustment rod being pivoted on the aforementioned arm, the other end being pivoted on the link rod, an end of the pedal rod being pivoted on the aforementioned arm at a location close to a bottom end, a tail end being crossed over on the aforementioned link rod with a roller, and a top surface at a tail end of the aforementioned pedal rod being disposed with a foot pedal to be stepped on by the user, and;   a raise angle member including a shaft seat and a drive seat, with the drive seat being provided with a motor, and a stretcher, left and right sides of the aforementioned shaft seat each being fixed on the aforementioned rear underframe with a bracket, the shaft seat being extended with a plurality of slide rods allowing the roller at the tail end of the aforementioned link rod to cross over thereon, a bottom end of each slide rod being fixed with a fixing rod, the drive seat being disposed on the aforementioned rear underframe, the drive seat being provided with the stretcher, and one end of the stretcher being pivoted on the aforementioned fixing rod;   with this kind of structure, when the motor operates to result in a change of stroke of elongation or shortening for an inner screw of the aforementioned stretcher, the shaft seat rotating about a pivot, which allows a free end of the fixing rod, also a free end of the slide rod, to have a change of angle of raise-up or drop-down, thereby forming an elliptical path of a different raise angle.