Elliptical exerciser

Abstract

An elliptical trainer comprises a frame set, two first transmission rods, two second transmission rods, two footboard assemblies, a holding flywheel assembly, a stand flywheel assembly, and two eccentric link rods. When a user is stepping the two footboard assemblies and taking exercise with elbows on the two second transmission rods, the two footboard assemblies may be stepped up and down to recycle and each second transmission rod may be rotated to reciprocate along an arc and centered in a stand ear. At this time, each drag rod of two stand ears arranged right and left may pull the corresponding eccentric link assembly to rotate 360 degree and the torque of the third flywheel may not overlap each drag rod of each eccentric link assembly vertically. Accordingly, the arrangement of each eccentric link assembly may prevent the swing operation from being stuck to pause or operate unsmoothly.

What is claimed is: 
     
         1 . An elliptical trainer, comprising a frame set, two first transmission rods, two second transmission rods, two footboard assemblies, a holding flywheel assembly, a stand flywheel assembly, and two eccentric link assemblies, the two first transmission rods are spaced apart from each other right and left and arranged in front of the frame set, the two second transmission rods are spaced apart from each other right and left and arranged in back of the frame set, the two footboard assemblies are spaced apart from each other right and left and arranged at bottom of the frame set, the holding flywheel assembly, the stand flywheel assembly, and the eccentric link assemblies are pivoted in the frame set and arranged alternatively top to bottom, wherein:
 the two first transmission rods are respectively arranged at two front sides of a right receiving space and a left receiving space of a rectangular frame disposed at top of the frame set, a bottom side of each first transmission rod is connected with a swinging rod with an arc shape, the bottom side of each first transmission rod is connected with a plate and spaced apart from the swinging rod, one end of the plate opposite to the first transmission rod is pivoted with an L-shaped link rod, one end of the L-shaped link rod opposite to the plate is linked to an axle of a first flywheel of the holding flywheel assembly;   the two second transmission rods are respectively arranged at two rear sides of the right receiving space and the left receiving space of the rectangular frame, each second transmission rod has a stand ear and a drag ear, the stand ear is pivoted with a top end of a stand rod and the stand rod is extended downwardly, the drag ear is pivoted with a top end of a drag rod; and   the two eccentric link assemblies are respectively arranged at two sides of a third flywheel of the stand flywheel assembly and connected to an axle thereof, each eccentric link assembly is connected to a bottom end of the corresponding drag rod, each eccentric link assembly includes a first link rod and a second link rod, one end of the first link rod is pivoted with the axle of the third flywheel of the stand flywheel assembly, one end of the first link rod opposite to the axle of the third flywheel of the stand flywheel assembly is pivoted with one end of the second link rod, one end of the second link rod opposite to the first link rod is pivoted with the bottom end of the corresponding drag rod.   
     
     
         2 . The elliptical trainer as claimed in  claim 1 , wherein the stand ear is arranged at one side of each second transmission rod, the drag ear is arranged at the side of each second transmission rod having the stand ear and spaced apart from the stand ear. 
     
     
         3 . The elliptical trainer as claimed in  claim 1 , wherein the stand ear is arranged at one side of each second transmission rod, and the drag ear is arranged at one end of each second transmission rod opposite to the stand ear. 
     
     
         4 . The elliptical trainer as claimed in  claim 2 , wherein a holding rod is pivoted with the stand ear and extended upwardly. 
     
     
         5 . The elliptical trainer as claimed in  claim 1 , wherein a holding rod is arranged at a top end of each first transmission rod. 
     
     
         6 . An elliptical trainer, comprising a frame set, two first transmission rods, two second transmission rods, two footboard assemblies, a holding flywheel assembly, a stand flywheel assembly, and two eccentric link assemblies, the two first transmission rods are spaced apart from each other right and left and arranged in front of the frame set, the two second transmission rods are spaced apart from each other right and left and arranged in back of the frame set, the two footboard assemblies are spaced apart from each other right and left and arranged at bottom of the frame set, the holding flywheel assembly, the stand flywheel assembly, and the eccentric link assemblies are pivoted in the frame set and arranged alternatively top to bottom, wherein:
 the two first transmission rods are respectively arranged at two front sides of a right receiving space and a left receiving space of a rectangular frame disposed at top of the frame set, a bottom side of each first transmission rod is connected with a swinging rod with an arc shape, each first transmission rod has a stand ear and a drag ear, the stand ear is pivoted with a top end of a stand rod, and the drag ear is pivoted with a top end of a drag ear;   the two second transmission rods are respectively arranged at two rear sides of the right receiving space and the left receiving space of the rectangular frame, the bottom side of each second transmission rod is connected with a plate, one end of the plate opposite to the second transmission rod is pivoted with an L-shaped link rod, one end of the L-shaped link rod opposite to the plate is linked to an axle of a first flywheel of the holding flywheel assembly; and   the two eccentric link assemblies are respectively arranged at two sides of a third flywheel of the stand flywheel assembly and connected to an axle thereof, each eccentric link assembly is connected to a bottom end of the corresponding drag rod, each eccentric link assembly includes a first link rod and a second link rod, one end of the first link rod is pivoted with the axle of the third flywheel of the stand flywheel assembly, one end of the first link rod opposite to the axle of the third flywheel of the stand flywheel assembly is pivoted with one end of the second link rod, one end of the second rod opposite to the first rod is pivoted with the bottom end of the corresponding drag rod.   
     
     
         7 . The elliptical trainer as claimed in  claim 6 , wherein the stand ear is arranged at one side of each first transmission rod, the drag ear is arranged at the side of each first transmission rod having the stand ear and spaced apart from the stand ear. 
     
     
         8 . The elliptical trainer as claimed in  claim 6 , wherein the stand ear is arranged at one side of each first transmission rod, and the drag ear is arranged at one end of each first transmission rod opposite to the stand ear. 
     
     
         9 . The elliptical trainer as claimed in  claim 7 , wherein a holding rod is pivoted with the stand ear and extended upwardly. 
     
     
         10 . The elliptical trainer as claimed in  claim 8 , wherein a holding rod is arranged at a top end of each second transmission rod.