Electric cushioning mechanism of a treadmill

Abstract

An electric cushioning mechanism of a treadmill having a cushioning rod assembly positioned at the rear end of the front support frame. The cushioning rod assembly is coupled to an electric cushioning mechanism. The electric cushioning mechanism includes a linking support, a cushioning drive motor, a slide element, and a slope guide plate. The linking support is provided with a roller at the bottom of both sides thereof, respectively. The cushioning drive motor has a guide screw rod. A pushing slope is formed at the bottom of both sides of the slide element. The pushing slope pushes against the slope guide plate. The roller of the linking support tends to slide on the path with different slopes by use of the angular change on the slope guide plate, thereby creating different reactive cushioning forces.

1 . An electric cushioning mechanism of a treadmill, the treadmill having a continuous moving belt positioned around a secondary base frame and driven by an electric motor, a handrail frame mounted at both sides of the front end of a primary base frame, the bottom of the front end of the primary base frame provided with a front support frame driven by a lifting motor to adjust the supporting angle of the primary base frame, several ground-touching elements fitted to the bottom of the rear side of the primary base frame, wherein a cushioning rod assembly is positioned at the rear end of the front support frame is and coupled to an electric cushioning mechanism; wherein the electric cushioning mechanism includes a linking support, a cushioning drive motor, a slide element, and a slope guide plate, and wherein the linking support is provided with a roller at the bottom of both sides thereof, respectively, and wherein the cushioning drive motor has a guide screw rod, and wherein a pushing slope is formed at the bottom of both sides of the slide element, and wherein the pushing slope pushes against the slope guide plate, whereby each roller of the linking support tends to slide on the path with different slopes by use of the angular change on the slope guide plate, thereby creating reactive cushioning forces in different intensity. 
     
     
         2 . The electric cushioning mechanism of a treadmill as recited in  claim 1 , wherein the cushioning drive motor is disposed on a fixing rib of the primary base frame such that the guide screw rod passes through the fixing rib and is screwed to the slide element. 
     
     
         3 . The electric cushioning mechanism of a treadmill as recited in  claim 1 , wherein the cushioning rod assembly consists of a connecting rod and an elastic element, and wherein the cushioning rod assembly is connected to the linking support. 
     
     
         4 . The electric cushioning mechanism of a treadmill of  claim 3 , wherein the front support frame is engaged with the linking support such that the elastic element cushions force from the front support frame upon the linking support. 
     
     
         5 . The electric cushioning mechanism of a treadmill of  claim 1 , wherein the cushioning drive motor and guide screw rod operate to drive the slide element and pushing slope in an axial to-and-fro movement to thereby impart an angular change to the slope guide plate.