Drag gain structure for gravity wheel of fitness equipments

Abstract

A drag gain structure for the gravity wheel of fitness equipment has an eccentric driving member located on the first side of gravity wheel, which has inner and outer side plate sections and an interconnecting piece. One end of outer side plate section is fitted over and fixed to the shaft. One end of inner side plate section is connected to an eccentric position of gravity wheel by the first bias joint pin. A separate bearing pedestal is located on the second side of gravity wheel, including bearings screwed on the shaft, a pedestal shell fitted over the bearing and a radial protruding plate on the periphery of pedestal shell. The protruding end of radial protruding plate is connected to an eccentric position of gravity wheel by the second bias joint pin.

I claim: 
     
         1 . A drag gain structure for the gravity wheel of fitness equipment, said gravity wheel is to be installed in a position of a shaft of fitness equipment; two ends of the shaft are to be driven by the preset power source to rotate; the gravity wheel comprises a first side and a second side; said drag gain structure comprises:
 an eccentric driving member, located on the first side of the gravity wheel; the eccentric driving member comprises an outer side plate section, an inner side plate section and an interconnecting piece located between the same ends of the outer side plate section and inner side plate section, wherein one end of the outer side plate section far from the interconnecting piece is provided with a coupling hole fitted over and fixed to the periphery of the shaft, so that the outer side plate section and the shaft are interlocked; one end of the inner side plate section far from the interconnecting piece is connected to an eccentric position of the gravity wheel by a first bias joint pin; the inner side plate section is connected to the end of the first bias joint pin, there is a pitch to the first side of the gravity wheel; an avoidance through hole is located in the intermediate section of the inner side plate section, the avoidance through hole allows the shaft to pass through in loose fit state;   a separate bearing pedestal, located on the second side of the gravity wheel and screwed on the periphery of the shaft; there is an axial spacing between the separate bearing pedestal and the gravity wheel; the separate bearing pedestal comprises more than one bearing, a pedestal shell fitted over the periphery of the bearing and a radial protruding plate on the periphery of the pedestal shell, wherein the bearing is screwed on the periphery of the shaft, the protruding end of the radial protruding plate is connected to an eccentric position of the gravity wheel by the second bias joint pin; the radial protruding plate is connected to the end of the second bias joint pin, there is a pitch to the second side of the gravity wheel;   an avoidance punch hole is located in the center of the gravity wheel for the shaft to pass through in loose fit state, forming the indirect transmission relationship of simultaneous motion of the gravity wheel and the separate bearing pedestal connected by the second bias joint pin.   
     
     
         2 . The drag gain structure for gravity wheel of fitness defined in  claim 1 , wherein the second bias joint pin and the first bias joint pin are located in the eccentric positions in different directions of the gravity wheel respectively, so that the second bias joint pin and the first bias joint pin are interlaced. 
     
     
         3 . The drag gain structure for gravity wheel of fitness defined in  claim 2 , wherein the interconnecting piece and the first bias joint pin are located in equidistant or approximately equidistant positions on two opposite sides in radial direction of the shaft respectively. 
     
     
         4 . The drag gain structure for gravity wheel of fitness defined in  claim 3 , wherein the central imaginary connecting line between the second bias joint pin and the first bias joint pin is any arrangement relationship of straight line or meander line through the center of the shaft. 
     
     
         5 . The drag gain structure for gravity wheel of fitness defined in  claim 4 , wherein the bearings of the separate bearing pedestal are two sets arranged in pair. 
     
     
         6 . The drag gain structure for gravity wheel of fitness defined in  claim 5 , wherein the plates of inner side plate section and outer side plate section of the eccentric driving member are arranged in parallel with an included angle of 0°. 
     
     
         7 . The drag gain structure for gravity wheel of fitness defined in  claim 6 , wherein the plates of inner side plate section and outer side plate section of the eccentric driving member are arranged in non-parallel with an included angle of 1° to 45°. 
     
     
         8 . The drag gain structure for gravity wheel of fitness defined in  claim 7 , wherein the second bias joint is dual column spaced. 
     
     
         9 . The drag gain structure for gravity wheel of fitness defined in  claim 1 , wherein the interconnecting piece of the eccentric driving member is a cylinder fixed between the same ends of the outer side plate section and inner side plate section. 
     
     
         10 . The drag gain structure for gravity wheel of fitness defined in  claim 8 , wherein the interconnecting piece of the eccentric driving member is a cylinder fixed between the same ends of the outer side plate section and inner side plate section. 
     
     
         11 . The drag gain structure for gravity wheel of fitness defined in  claim 1 , wherein the interconnecting piece is a plate integrated between the same ends of the outer side plate section and inner side plate section. 
     
     
         12 . The drag gain structure for gravity wheel of fitness defined in  claim 8 , wherein the interconnecting piece is a plate integrated between the same ends of the outer side plate section and inner side plate section.