Cushion device for exercise machine

Abstract

A cushion device for an exercise machine, such as treadmill, includes a linkage, a spring and a mount. The linkage is pivoted on a bottom of the exercise machine, and wheel is pivoted on a distal end of the linkage. The mount is fixed to the bottom of the exercise machine, on which the spring is provided to urge the linkage. When user takes exercise on the machine, the vibration from different orientations will transmit to the linkage and make it swing, such that the spring is compressed to absorb the vibration.

1 . A cushion device, which is mounted on an exercise machine to absorb vibration, comprising a linkage having an end pivot on a bottom of the exercise machine to be swung by the vibration; and an elastic member having opposite end urging the exercise machine and the linkage respectively to be elastically deformed when the linkage is swung, wherein an angle between the linkage and the ground is less than ninety degrees.  
   
   
       2 . The cushion device as defined in  claim 1 , further comprising a mount fixed to the exercise machine, which has a shaft through a bore of the linkage and a nut screwed to a distal end of the shaft, wherein the elastic member is fitted to the shaft.  
   
   
       3 . The cushion device as defined in  claim 1 , further comprising a wheel pivoted on the linkage to touch the ground.  
   
   
       4 . The cushion device as defined in  claim 1 , wherein the linkage includes two substantially parallel arms and a plate connected to the arms.  
   
   
       5 . The cushion device as defined in  claim 4 , further comprising a wheel between the arms and pivoted thereon to touch the ground.  
   
   
       6 . The cushion device as defined in  claim 4 , further comprising a mount fixed to the exercise machine, wherein the mount has a shaft though a bore on the plate with a nut screwed to a distal end thereof and the elastic member is fitted to the shaft.  
   
   
       7 . The cushion device as defined in  claim 1 , wherein the angle between the linkage and the ground is preferred less than forty-five degrees.