Prolong-tracked elliptical exercise machine

Abstract

A prolong-tracked elliptical exercise machine has a base, two poles, two pedal assemblies and a wheel assembly. The pedal assemblies are mounted oppositely beside the base and each pedal assembly has a linking bar, a rail and a pedal. The linking bar is pivotally mounted between the corresponding pole and the wheel assembly. The rail is mounted securely on the linking bar. The pedal is mounted slidably on the rail and is synchronized to and moved along the rail by a driving assembly driven by movement of the wheel assembly. Accordingly, since pedals move relative to the rail, a distance of pedal movement is increased to provide greater exercise advantages at low cost.

1 . A prolong-tracked elliptical exercise machine comprising
 a base having a front end, a rear end and two sides;   two poles being pivotally mounted oppositely on the two sides of the base near the front end, each pole having a lower end;   a wheel assembly being mounted rotatably in the rear end of the base and providing resistance and having an edge and two sides;   two pedal assemblies being mounted oppositely on the sides of the base, being connected respectively to the poles and the sides of the wheel assembly, and each pedal assembly comprising
 a linking bar being connected to the lower end of a corresponding pole and the edge of the wheel assembly and having
 a front end being connected pivotally to the lower end of the corresponding pole; 
 a rear end; 
 a rear sleeve being formed transversely in the rear end of the linking bar; and 
 a front sleeve being securely mounted transversely in the linking bar near the rear end of the linking bar; 
 
 a rail being mounted securely on the linking bar near the front end of the linking bar; 
 a sliding member being covering and mounted slidably on the rail; and 
 a pedal being mounted securely on the sliding member; and 
   two driving assemblies being respectively connected to the pedal assemblies and connected to both sides of the wheel assembly at the edge of the wheel assembly, and each driving assembly comprising
 a driving gear having
 a securing shaft protruding concentrically from the driving gear;
 wherein the securing shafts of the driving assemblies are diametrically mounted securely in the edge of the wheel assembly; and 
 
 a mounting shaft concentrically protruding from the driving gear opposite to the securing shaft and being mounted rotatably in the rear sleeve of the linking bar; 
 
 a transmission gear engaging the driving gear and having a driving shaft being formed concentrically on and protruding from the transmission gear and being mounted rotatably through the front sleeve of the linking bar and having a distal end; 
 a linking element having
 a drive end being mounted securely on the distal end of the driving shaft of the transmission gear; and 
 a pedal end; 
 
   
     an actuating element being connected to the pedal end of the linking element and the sliding member. 
   
   
       2 . The prolong-tracked elliptical exercise machine as claimed in  claim 1 , wherein
 the rail further comprises
 a top panel being substantially U-shaped in cross section and having a bottom surface and two side edges; 
 two clamping panels being longitudinally formed parallelly on the bottom surface of the top panel to clamp the linking bar, corresponding to and securing the rail on the linking bar; and 
 two tracks being formed respectively on and protruding transversely from the side edges of the top panel and extending toward the clamping panels; 
   the sliding member further comprises
 a main panel being shorter than the rail and having two side edges, a top surface and multiple pinholes; 
 two wheel mounts being substantially U-shaped and formed longitudinally along the side edges of the main panel and comprising
 a connected side being formed on and protruding form the main panel; and 
 an open side being parallel and opposite to the connected side; and 
 
 multiple wheels being mounted rotatably on the open sides of the wheel mounts, and being mounted slidably on the track of the rail. 
   
   
   
       3 . The prolong-tracked elliptical exercise machine as claimed in  claim 1 , wherein
 the driving assembly further comprises
 a rear bearing assembly being mounted in the pedal end of the linking element; and
 a front bearing assembly being mounted in the sliding member; and 
 
 the actuating element is further connected between and mounted pivotally on the front and rear bearing assemblies. 
   
   
   
       4 . The prolong-tracked elliptical exercise machine as claimed in  claim 1 , wherein the driving gears and transmission gears have same diameters and numbers of teeth.