Wheel assembly of exercise machine capable of presetting resistance parameters

Abstract

A wheel assembly of an exercise machine includes a base having a fixed disk. A flywheel is provided on the base. A damper, which is provided on the fixed disk, has a displacement mechanism and a magnet assembly connected to the displacement mechanism and moved by the displacement mechanism toward or away from the flywheel. A motor is provided on the fixed disk and connected to the displacement mechanism for adjusting a position of the magnet assembly. A control circuit, which has a processor, an angle sensor connected to the processor and a memory, is connected to the motor and the damper to sense the position of the magnet assembly and control the motor driving the displacement mechanism to adjust the position of the magnet assembly. Therefore, the memory stores resistance parameters of presetting the magnet assembly acting on the flywheel to achieve the presetting function.

1 . A wheel assembly of an exercise machine, comprising:
 a base having a fixed disk;   a flywheel provided on the base;   a damper, which is provided on the fixed disk, having a displacement mechanism and a magnet assembly connected to the displacement mechanism and moved by the displacement mechanism toward or away from the flywheel;   a motor provided on the fixed disk and connected to the displacement mechanism for adjusting a position of the magnet assembly; and   a control circuit, which has a processor, an angle sensor connected to the processor and a memory, connected to the motor and the damper to sense the position of the magnet assembly and control the motor driving the displacement mechanism to adjust the position of the magnet assembly.   
   
   
       2 . The wheel assembly as defined in  claim 1 , wherein the motor is connected to a gear box, and the magnet assembly of the damper includes two curved magnetic plates with ends pivoted on the disk and free ends even with a circumference of the fixed disk, and the displacement mechanism includes a knob with an elongated body through the fixed disk, a connecting block on a tail end of the body and two connecting arms on opposite sides and two links with opposite ends pivoted on distal ends of the connecting arms and the free ends of the curved magnetic plates. 
   
   
       3 . The wheel assembly as defined in  claim 2 , wherein the angle sensor is a variable resistance corresponding and connected to the knob. 
   
   
       4 . The wheel assembly as defined in  claim 3 , wherein the memory is a nonvolatile memory storing a table of a relationship of an angle of the knob and a resistance therein. 
   
   
       5 . The wheel assembly as defined in  claim 1 , wherein the base has an upright frame pole, on which the fixed disk is mounted.