Elliptical trainer
View Patent ↗An elliptical trainer includes a frame; two pedal units, disposed on two opposite sides of the frame; two linkage units, disposed on the two opposite sides of the frame and connected to the two pedal units; and a resistance unit, disposed on the frame. The two pedal units are connected to the resistance unit via the corresponding linkage units.
1 . An elliptical trainer, comprising:
a frame, including a base, a post and a front connecting bracket, the base extending in a horizontal direction, the post being fixed to the base and extending in a height direction, the front connecting bracket being connected between the base and the post, the frame having a first pivot part, a second pivot part and a third pivot part that are arranged on the frame sequentially from high to low in the height direction, the second pivot part being located between the first pivot part and the third pivot part in the horizontal direction, the first pivot part and the second pivot part being disposed on the post, the third pivot part being disposed on the front connecting bracket;
two pedal units, disposed on two opposite sides of the frame, the pedal units each including a handlebar rod, a pedal rod, and a foot pedal, the foot pedal having a pedal face, one end of the handlebar rod being pivotally connected to the first pivot part, one end of the pedal rod being pivotally connected to an upper pivot point of the foot pedal, the pedal rod having a pedal rod connection point between two opposite ends thereof, the handlebar rod having a handlebar rod connection point between the upper and lower ends thereof, the pedal rod connection point being connected to the handlebar rod connection point so that the pedal rod is pivotally connected to the handlebar rod;
two linkage units, disposed on the two opposite sides of the frame and connected to the two pedal units respectively, the linkage units each including a first bar, a second bar, a third bar, a fourth bar and a rotating shaft connecting member, one end of the first bar being pivotally connected to the second pivot part, another end of the first bar being pivotally connected to one end of the second bar, another end of the second bar and one end of the third bar being pivotally connected to one end of the rotating shaft connecting member, another end of the rotating shaft connecting member being pivotally connected to the third pivot part, the rotating shaft connecting members of the two linkage units on the two sides of the frame being arranged 180 degrees apart in a radial direction of the third pivot part; the first bar having a first bar connection point between the two opposite ends of the first bar, the fourth bar having a fourth bar connection point between two opposite ends of the fourth bar, one end the fourth bar being pivotally connected to the first bar connection point, another end of the third bar being pivotally connected to the fourth bar connection point, the other end the fourth bar being pivotally connected to the other end of the pedal rod;
a resistance unit, disposed on the frame and connected to the third pivot part, the two pedal units being connected to the resistance unit via the corresponding linkage units;
wherein when in use, the foot pedals of the two pedal units on the two sides of the frame are driven to move along a closed path, and the two foot pedals are located on two opposite sides of a center of the closed path when moved.
2 . The elliptical trainer as claimed in claim 1 , wherein the first bar, the second bar, the third bar and the fourth bar are connected to form a four-bar linkage.
3 . The elliptical trainer as claimed in claim 1 , wherein each pedal unit includes a pedal bottom rod, another end of the handlebar rod is pivotally connected to one end of the pedal bottom rod, another end of the pedal bottom rod is pivotally connected to a lower pivot point of the foot pedal, the upper pivot point and the lower pivot point are arranged adjacent to each other in the height direction, and a first distance from the handlebar rod connection point to the end of the handlebar rod connected to the pedal bottom rod is less than a second distance between the upper pivot point and the lower pivot point; wherein when the two foot pedals are moved and located on the two opposite sides of the center of the closed path in the horizontal direction, the pedal faces of the two foot pedals are inclined at an angle toward the center of the closed path.
4 . The elliptical trainer as claimed in claim 1 , wherein the pedal units each include a movable handlebar, the movable handlebar is connected to the upper end of the handlebar rod, and the two movable handlebars of the pedal units extend in the height direction and have a gradually enlarged section and a gripping section.
5 . The elliptical trainer as claimed in claim 1 , wherein the frame further includes an upper arm, two immovable handlebars and a display screen, the upper arm extends in the height direction and is fixed to the post, the two immovable handlebars are fixed to two sides of the upper arm, and the display screen is fixed to an upper end of the upper arm.
6 . The elliptical trainer as claimed in claim 1 , wherein the base includes a base body and two transverse supports, the two transverse supports are connected to two opposite ends of the base body, and the two transverse supports each have two support feet and two guide wheels.
7 . The elliptical trainer as claimed in claim 6 , wherein the frame includes two side armrests, front ends of the two side armrests are connected to two opposite sides of the post, rear ends of the two side armrests are connected to a rear one of the two transverse supports, and the two pedal units are located between the two side armrests.
8 . The elliptical trainer as claimed in claim 1 , wherein the front connecting bracket includes a left connecting bracket and a right connecting bracket, the left connecting bracket and the right connecting bracket are spaced a determined distance apart from each other, the third pivot part includes two shaft seats and a rotating shaft, the two shaft seats are respectively fixed to the left connecting bracket and the right connecting bracket, and the rotating shaft is rotatably connected to the two shaft seats.
9 . The elliptical trainer as claimed in claim 8 , wherein the third pivot part further includes two adjustment screw assemblies, the two adjustment screw assemblies are respectively arranged adjacent to the two shaft seats, the two adjustment screw assemblies each have two adjustment screws, and the two adjustment screws are rotatable and are against two opposite ends of a corresponding one of the shaft seats, respectively.
10 . The elliptical trainer as claimed in claim 8 , wherein the resistance unit includes an output wheel, a transmission wheel and a resistance wheel, the output wheel is disposed on the rotating shaft and rotates synchronously along with the rotating shaft, the transmission wheel and the resistance wheel are rotatably connected to the frame, the output wheel drives and is connected to the transmission wheel via a first belt, and the transmission wheel drives and is connected to the resistance wheel via a second belt.