A lifting device for a platform of a treadmill includes a telescope shaft has a front end pivotally connected to a front portion of the platform. A power source is laterally mounted to the telescope shaft for reciprocally telescopically driving the telescope shaft. Two first linkages each has a first end pivotally connected to the two opposite sides of the base member and a second end pivotally connected to the two opposite sides of the platform. Two second linkages each includes a first end having a roller rotatably mounted thereto and a second end pivotally connected to the two opposite sides of the platform. A second connecting rod securely connected to the two second linkages. A pivot seat extends from the second connecting rod and a second end of the telescope shaft is pivotally mounted to the pivot seat.
A treadmill includes a base and a frame having a first end pivotably connected to the base by two parallel first links and two parallel second links. An endless belt is mounted to the frame. Two respective first ends of the two first links are pivotably connected to two respective first pivotal points on the two side rails of the base, and two respective second ends of the two first links are pivotably connected to two respective second pivotal points on two sides of the first end of the frame. Two respective first ends of the two second links are pivotably connected to two respective third pivotal points on the two side rails of the base, and two respective second ends of the two second links are pivotably connected to two respective fourth pivotal points on the two sides of the first end of the frame. The frame can be pivoted relative to the base by the first and second links.
A treadmill includes a base with two side rails, a frame with two side rods and an endless running belt, two first links, two second links, two third links, a fixing rod which is fixed in-between the two first links with a connection and an actuator is composed of a motor and a motor driven moving part which is pivotally connected to the connection of the fixing rod. Each group of the first links, the second links, the third links and the side rail is structured as a four-bar-link mechanism, which is working to bring up or down the first end of the frame when the actuator is driving the moving part, incline angle of the frame is changing, the purpose of adjusting the inclination of the frame and even folding the frame is simply and efficiently achieved.
A treadmill has a frame, a table assembly and an elevating apparatus to elevate the table assembly. The treadmill has a driving device provided at a bottom side of the table assembly. A transverse shaft is connected to the driving device. Two first linkages each has three pivot portions, wherein two of the pivot portions at ends thereof are pivoted on the table assembly and ends of the transverse shaft respectively. Two second linkages have opposite ends pivoted on the frame and the table assembly respectively, each of which has a pivot portion between the ends thereof to be pivoted on the first linkages at the third pivot portions respectively.
A treadmill includes a base and a frame has a first end thereof pivotably connected to the base and an endless belt is connected to the frame. A guide rod has its axis extending lengthwise of the frame and a first end of the guide rod is fixed to the base. A second end of the guide rod connected to the base. A sleeve extends through a through hole in a transverse bar of the base 10 and the guide rod is received in the sleeve which is able to move along the guide rod back and forth. A supporting rod has a first end thereof pivotably connected to a pivotal portion on the sleeve and a second end of the supporting rod is pivotably connected to a first pivotal portion on the frame. A securing device is connected to the sleeve so as to secure movement of the sleeve relative to the guide rod so that the frame can be kept at upright position.
