US20170080282A1

US20170080282A1 - Elliptical exerciser

Info

Publication number: US20170080282A1
Application number: US15/367,457
Authority: US
Inventors: Ying-Chou Lai
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-07-16
Filing date: 2016-12-02
Publication date: 2017-03-23

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.

Description

FIELD OF THE INVENTION

The present invention relates to an elliptical trainer, and more particularly to an elliptical trainer capable for being stepped elliptically.

BACKGROUND OF THE INVENTION

The conventional elliptical trainer is used for consuming the movement of stepping by stepping the footboards to drive the flywheel(s), such as inertia wheel. The flywheel may be user to drive the drag rod through a flexible member, such as belt. However, when the drag rod is pulling the flywheel to rotate, the torque of the flywheel may be overlapped the drag rod so that the total torque is zero to result in that the flywheel is unable to be driven or rotates unsmoothly.
In order to solve above drawback, China patent no. 201010563057.7 has disclosed that a magnetic actuator is used to prevent the flywheel from stopping rotating. However, if another magnetic member is used, the cost may be higher and increased and alignment is necessary while assembling to prevent from vibrating and swinging.
In addition, the footboards and the handlebars of the conventional elliptical trainer are linked so that they may not step up and down or operate with the handlebars separately and individually. Therefore, the conventional elliptical trainer may only provide to swing forward and backward and step elliptically. It may not provide to step up and down individually. Besides, the damping of the conventional elliptical trainer is performed by the magnetic-control wheel. It is unable to train the hands or feet individually. The amplitude and range of the damping is controlled electronically or by hand. It is inconvenient to use.
Accordingly, the present invention may be stepped up and down and swung forward and backward. The ranges of moving up and down and forward and back may be adjusted while the user is training based on the amount of exercise. The damping is not necessary to be controlled electronically or by hand. Obviously, the functions and operations of the present invention are improved.
In view of the foregoing circumstances, the inventor has invested a lot of time to study the relevant knowledge, compare the pros and cons, research and develop related products. After quite many experiments and tests, the “elliptical trainer” of this invention is eventually launched to improve the foregoing shortcomings, to meet the public use.

SUMMARY OF THE INVENTION

An objective of this invention is providing an elliptical trainer. 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 the stand ear. At this time, the drag rods of the two stand ears arranged right and left may pull the corresponding eccentric link assembly to rotate an angle of 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.
To achieve above objectives, an elliptical trainer is disclosed. The 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 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. The first transmission rod, the holding flywheel assembly, the swing rod, and the two footboard assemblies are synchronized to forward and backward swing and operate with damping. The second transmission rod, the stand flywheel assembly, the drag rod, the two eccentric link rods, and the two footboard assemblies are synchronized to up-and-down step and operate with damping. The forward and backward and up-and-down damping is mixed so that the two footboard assemblies may be individually stepped up-and-down and forward and backward elliptically. The elbow(s) and feet may take exercise.
In some embodiments, 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.
In some embodiments, 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.
In some embodiments, a holding rod is pivoted with the stand ear and extended upwardly.
In some embodiments, a holding rod is arranged at a top end of each first transmission rod.
To achieve above objectives, an elliptical trainer is further disclosed. The 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 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. The first transmission rod, the stand flywheel assembly, the swing rod, the eccentric link rod, the stand rod, the second transmission rod, the two footboard assemblies, and the holding flywheel assembly are synchronized to swing forward and backward and step up and down elliptically so as to provide the elbow(s) and feet to take exercise.
In some embodiments, 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.
In some embodiments, 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.
In some embodiments, a holding rod is pivoted with the stand ear and extended upwardly.
In some embodiments, a holding rod is arranged at a top end of each second transmission rod.
Further features and advantages of the present invention will become apparent to those of skill in the art in view of the detailed description of preferred embodiments which follows, when considered together with the attached drawings and claims.

BRIEF DESCRIPTION OF THE DRAWINGS

All the objects, advantages, and novel features of the invention will become more apparent from the following detailed descriptions when taken in conjunction with the accompanying drawings.

FIG. 1 is a right-side perspective view of a first embodiment of an elliptical trainer of the present invention.

FIG. 2 is a left-side perspective view of the first embodiment of the elliptical trainer of the present invention.

FIG. 3 is a partially enlarged view of the eccentric link assemblies of the first embodiment of the present invention.

FIGS. 4 and 5 are operational view of the eccentric link assemblies of the first embodiment of the present invention.

FIG. 6 is a right-side perspective view of a second embodiment of an elliptical trainer of the present invention.

FIG. 7 is a right-side perspective view of a third embodiment of an elliptical trainer of the present invention.

FIG. 8 is a right-side perspective view of a fourth embodiment of an elliptical trainer of the present invention.

FIG. 9 is a right-side perspective view of a fifth embodiment of an elliptical trainer of the present invention.

FIG. 10 is a right-side perspective view of a sixth embodiment of an elliptical trainer of the present invention.

FIG. 11 is a right-side perspective view of a seventh embodiment of an elliptical trainer of the present invention.

FIG. 12 is a right-side perspective view of an eighth embodiment of an elliptical trainer of the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring now to the drawings where like characteristics and features among the various figures are denoted by like reference characters.
Please refer to FIGS. 1 to 5, a first embodiment of an elliptical trainer 100 of the present invention may comprise a frame set 1, two first transmission rods 2, two second transmission rods 3, two footboard assemblies 4, a holding flywheel assembly 5, a stand flywheel assembly 6, and two eccentric link assemblies 7. The two first transmission rods 2 are spaced apart from each other right and left and arranged in front of the frame set 1. The two second transmission rods 3 are spaced apart from each other right and left and arranged in back of the frame set 1. The two footboard assemblies 4 are spaced apart from each other right and left and arranged at bottom of the frame set 1. The holding flywheel assembly 5, the stand flywheel assembly 6, and the eccentric link assemblies 7 are pivoted in the frame set 1 and arranged alternatively top to bottom.
A rectangular frame 11 is arranged at top of the frame set 1. Two boards 12 are spaced apart from each other and arranged at a middle section of the rectangular frame 11 so that the rectangular frame 11 is divided into three receiving spaces. The two first transmission rods 2 are respectively arranged at two front sides of the right receiving space and the left receiving space of the rectangular frame 11. The two second transmission rods 3 are respectively arranged at two rear sides of the right receiving space and the left receiving space of the rectangular frame 11. The receiving space between the two boards 12 may receive the holding flywheel assembly 5. A front rod 13 is arranged at the front end which is at bottom of the frame set 1 and a rear rod 14 is arranged at a rear end which is at bottom of the frame set 1. A first holding-flywheel-assembly fixing stand 15, a second holding-flywheel-assembly fixing stand 16, a first stand-flywheel-assembly fixing stand 17, and a second stand-flywheel-assembly fixing stand 18 are arranged between the front rod 13 and the rear rod 14. A foundation 19 is arranged at bottom of the front rod 13 and the rear rod 14.
The two first transmission rods 2 are respectively arranged at two front sides of the right receiving space and the left receiving space of the rectangular frame 11. A bottom side of each first transmission rod 2 is connected with a swinging rod 23 with an arc shape. The bottom side of each first transmission rod 2 is connected with a plate 21 and spaced apart from the swinging rod 23. One end of the plate 21 opposite to the first transmission rod 2 is pivoted with an L-shaped link rod 22. One end of the L-shaped link rod 22 opposite to the plate 21 is linked to an axle of a first flywheel 51 of the holding flywheel assembly 6.
The two second transmission rods 3 are respectively arranged at two rear sides of the right receiving space and the left receiving space of the rectangular frame 11. One side of each second transmission rod 3 has a stand ear 32. Each second transmission rod 3 is upwardly pivoted to a holding rod 31 through the stand ear 32 and downwardly pivoted to a stand rod 33 with an arc shape. That is, each second transmission rod 3 has the stand ear 32 and a drag ear 34 which are arranged at the same side of each second transmission rod 3. The stand ear 32 is pivoted with a top end of the stand rod 33 and the stand rod 33 is extended downwardly. The drag ear 34 is pivoted with a top end of a drag rod 73.
The two footboard assemblies 4 are respectively arranged at two bottom sides of each first transmission rod 2 and each second transmission rod 3. Each footboard assembly 4 may include an elongated rectangular tube 41, a front ear 42, a rear ear 43, and a footboard 44. The front ear 42 and the rear ear 43 are respectively arranged at a front end and a middle section of the elongated rectangular tube 41. The footboard 44 is arranged at a rear end of the elongated rectangular tube 41. The front ear 42 may be pivoted to the bottom end of the corresponding drag rod 23 and the rear ear 43 may be pivoted to the bottom end of the corresponding stand rod 33.
The holding flywheel assembly 5 may include a first flywheel 51 and a second flywheel 52. A belt 53 covers the peripheral of the first flywheel 51 and the axle of the second flywheel 52. The first flywheel 51 is rotated to drive the second flywheel 52 to rotate through the belt 53. The axle of the first flywheel 51 is pivoted to the first holding-flywheel-assembly fixing stand 15 and the axle of the second flywheel 52 is pivoted to the second holding-flywheel-assembly fixing stand 16.
The stand flywheel assembly 6 may include a third flywheel 61, a fourth flywheel 62, and a fifth flywheel 63. The axle 611 of the third flywheel 6 passes through the first stand-flywheel-assembly fixing stand 17. A bet 64 covers the peripheral of the third flywheel 61 and the axle of the fourth flywheel 62. The third flywheel 61 is rotated to drive the fourth flywheel 62 to rotate through the belt 64. Another belt 65 covers the peripheral of the fourth flywheel 62 and the axle of the fifth flywheel 63. The fourth flywheel 62 is rotated to drive the fifth flywheel 63 to rotate through the belt 65. The axle of the fifth flywheel 63 is pivoted to the fifth-flywheel fixing stand 6 of the stand flywheel assembly 6 and the fifth-flywheel fixing stand 60 is arranged on the foundation 19.
Please refer to FIGS. 3 and 4, the two eccentric link assemblies 7 are respectively arranged at two sides of the third flywheel 61 of the stand flywheel assembly 6 and connected to an axle thereof. Each eccentric link assembly 7 is connected to the bottom end of the corresponding drag rod 73. Each eccentric link assembly 7 may include a first link rod 71 and a second link rod 72. One end of the first link rod 71 is pivoted with the axle 611 of the third flywheel 61 of the stand flywheel assembly 6. One end of the first link rod 71 opposite to the axle 611 of the third flywheel 61 of the stand flywheel assembly 6 is pivoted with one end of the second link rod 72. One end of the second link rod 72 opposite to the first link rod 71 is pivoted with the bottom end of the corresponding drag rod 73.
Accordingly, the tail end of the swinging rod 23 of each first transmission rod 2 is pivoted to the front ear 42 of the corresponding footboard assembly 4 and the tail end of the stand rod 33 of each second transmission rod 3 is pivoted to the rear ear 43 of the corresponding footboard assembly 4. When the two swinging rods 23 is swung and the two footboard assemblies 4 is stepped up and down, the two first transmission rods 2 may drive the stand flywheel assembly 6 and the two second transmission rods 3 may drive the holding flywheel assembly 5 so that the energies generated from exercising may be consumed by the stand flywheel assembly 6 and the holding flywheel assembly 5. Furthermore, the two first transmission rods 2 and the two second transmission rods 3 may be operated to take exercise with one elbow or two feet separately or operated together to take exercise with elbows and two feet. Each second transmission rod 3 is pivoted to the corresponding stand ear 32 and the stand ear 32 is connected with corresponding first transmission rod 2 and second transmission rod 3. Therefore, when each first transmission rod 2 and each second transmission rod 3 are rotated, the stand ear 32 may drive the corresponding holding rod 31 to swing up and down centered in each first transmission rod 2 and each second transmission rod 3.
Please refer to FIG. 5, when a user is stepping the two footboard assemblies 4 and taking exercise with elbows on the two second transmission rods 3, the two footboard assemblies 4 may be stepped up and down to recycle and each second transmission rod 3 may be rotated to reciprocate along an arc and centered in the stand ear 32. At this time, the drag rods 73 of the two stand ears arranged right and left may pull the corresponding eccentric link assembly 7 to rotate an angle of 360 degree and the torque of the third flywheel 61 may not overlap each drag rod 73 of each eccentric link assembly 7 vertically. Accordingly, the arrangement of each eccentric link assembly 7 may prevent the swing operation from being stuck to pause or operate unsmoothly.
Please refer to FIG. 6, a second embodiment of the present invention is illustrated. The difference between the second embodiment and the first embodiment is described as follows. A holding rod 31 is connected to the top end of each second transmission rod 3. The stand ear 32 is arranged at one side of each second transmission rod 3. The drag ear 34 is arranged at the side of each second transmission rod 3 opposite to the stand ear 32. The drag ear 34 is provided the drag rod 73 to pivot with.
Please refer to FIG. 7, a third embodiment of the present invention is illustrated. The difference between the third embodiment and the first embodiment is described as follows. The holding rod 31 id arranged at the top end of each first transmission rod 2.
Please refer to FIG. 8, a fourth embodiment of the present invention is illustrated. The difference between the fourth embodiment and the second embodiment is described as follows. The holding rod 31 is arranged at the top end of each first transmission rod 2.
Please refer to FIG. 9, a fifth embodiment of the present invention is illustrated. The difference between the fifth embodiment and the third embodiment is described as follows. The stand ear 32 is arranged at one side of each first transmission rod 2. Each first transmission rod 2 is upwardly pivoted to the holding 31 through the stand ear 31 and downwardly pivoted to the stand rod 33 with the arc shape. The drag ear 34 is arranged at the side of each first transmission rod 3 having the stand ear 32 and spaced apart from the stand ear 32. The drag ear 34 is provided the drag rod 73 to pivot with.
The bottom side of each second transmission rod 3 is connected with the plate 21 and spaced apart from the holding rod 31. The end of the plate opposite to the second transmission rod 3 is pivoted to the L-shaped link rod 22. The end of the L-shaped link rod opposite to the plate 21 is linked to the axle of the first flywheel 51.
Please refer to FIG. 10, a sixth embodiment of the present invention is illustrated. The difference between the sixth embodiment and the fifth embodiment is described as follows. The stand ear 32 is arranged at one side of each first transmission rod 2. The drag ear 34 is arranged at the side of each first transmission rod 3 opposite to the stand ear 32. The drag ear 34 is provided the drag rod 73 to pivot with.
Please refer to FIG. 11, a seventh embodiment of the present embodiment is illustrated. The difference between the seventh embodiment and the first embodiment is described as follows. The stand ear 32 is arranged at one side of each first transmission rod 2. The drag ear 34 is arranged at the side of each first transmission rod 2 having the stand ear 32 and spaced apart from the stand ear 32. The drag ear 34 is provided for the drag rod 73 to pivot with.
Please refer to FIG. 12, the eighth embodiment of the present invention is illustrated. The difference between the eighth embodiment and the first embodiment is described as follows. The stand ear 32 is arranged at one side of each first transmission rod 2. The drag ear 34 is arranged at the side of each first transmission rod 2 opposite to the stand ear 32 and spaced apart from the stand ear 32. The drag ear 34 is provided for the drag rod 73 to pivot with.
The above mentioned embodiments may achieve the effect of taking exercise with elbow(s) and two feet for stepping so as to prevent the swing operation from being stuck to pause or operate unsmoothly. In addition, according to the above mentioned embodiments, the two footboard assemblies may cooperate with the damping while being stepped up and down and operated, and the two footboard assemblies may also individually be stepped up and down or forward and backward elliptically to provide the hand(s) and feet for taking exercise.
The foregoing descriptions are merely the exemplified embodiments of the present invention, where the scope of the claim of the present invention is not intended to be limited by the embodiments. Any equivalent embodiments or modifications without departing from the spirit and scope of the present invention are therefore intended to be embraced.
The disclosed structure of the invention has not appeared in the prior art and features efficacy better than the prior structure which is construed to be a novel and creative invention, thereby filing the present application herein subject to the patent law.

Claims

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.