Elliptical exercise machine
An exercise machine may include a reciprocating linkage that supports one or more pedals configured to move in a closed loop (e.g., elliptical) path as a user exercises with the machine. The exercise machine may be adjustable to vary a characteristic of the exercise provided by the machine, for example by changing an incline of a rail supporting the reciprocating linkage, and thus an angle of the closed loop path. The exercise machine may vary the incline with a lift mechanism operatively associated with the front upright frame of the machine, which may also support a resistance assembly, all in a compact form factor that may be more aesthetically pleasing and practical for relatively smaller exercise spaces.
1. An exercise machine comprising:
a frame comprising a base configured to support the exercise machine on a support surface and a mast extending upwardly from the base and comprising:
a first upright support extending from a front end of the base,
a second upright support extending from the base, and
a third upright support connecting an intermediate location of the second upright support to the first upright support;
a crankshaft rotatably coupled to the frame to rotate about a first rotation axis;
a reciprocating member supporting a pedal such that the pedal is constrained to move in a closed loop path, and wherein the reciprocating member is operatively coupled to the crankshaft such that movement of the pedal in the closed loop path causes rotation of the crankshaft about the first rotation axis;
a rail pivotally coupled to the frame and movably supporting the reciprocating member, wherein the reciprocating member is configured to translate along the rail when the pedal moves in the closed loop path; and
a lift mechanism suspended from the mast from a location above the first rotation axis and operatively coupled to the rail for adjusting an incline of the rail.
2. The exercise machine of claim 1 , wherein the second upright support connects to an intermediate location of the first upright support.
3. The exercise machine of claim 2 , further comprising a resistance mechanism operatively coupled to the crankshaft to resist rotation of the crankshaft.
4. The exercise machine of claim 3 , wherein the resistance mechanism comprises a flywheel rotatably supported by the frame.
5. The exercise machine of claim 4 , wherein the flywheel is rotatably supported on the mast.
6. The exercise machine of claim 5 , wherein the crankshaft and the flywheel rotate at different rotational speeds.
7. The exercise machine of claim 6 , further comprising a transmission assembly that transmits the rotation of the crankshaft to the flywheel while changing the rotational speed thereof.
8. The exercise machine of claim 7 , wherein the transmission assembly comprises a rotating disk fixed to the crankshaft to rotate in synchrony with the crankshaft and wherein the rotating disk and the flywheel are located on opposite sides of the mast.
9. The exercise machine of claim 8 , wherein the lift mechanism is positioned between the rotating disk and the flywheel such that the driven portion moves in a plane parallel to and between respective planes of the rotating disk and the flywheel.
10. The exercise machine of claim 7 , wherein the transmission assembly comprises a single-stage belt-drive assembly.
11. The exercise machine of claim 5 , wherein the flywheel is rotatably supported on the mast at a vertical location below the crankshaft.
12. The exercise machine of claim 2 , further comprising a console supported by the frame, wherein the console includes a processor, a memory, and a display, and wherein the processor is in communication with one or more user input devices for controlling an operation of the exercise machine.
13. The exercise machine of claim 12 , wherein the one or more user input devices are configured to receive user input for varying at least one of the incline of the rail, a resistance level, and information displayed on the display.
14. The exercise machine of claim 13 , wherein the information displayed on the display comprises a video, and wherein the processor is configured to vary a playback rate of the video based on a rate of rotation of the crankshaft.
15. The exercise machine of claim 12 , wherein the one or more user input devices include one or more buttons located on a movable handle of the exercise machine.
16. The exercise machine of claim 12 , wherein the memory includes instructions that cause the processor to:
store exercise performance data in the memory;
adjust an exercise program stored in the memory based on the exercise performance data to generate an adapted exercise program; and
provide instructions, via the console, for adjusting at least one of the incline of the rail and the resistance level in accordance with the adapted exercise program, or automatically adjust at least one of the incline of the rail and the resistance level in accordance with the adapted exercise program.
17. The exercise machine of claim 2 , wherein the second upright support has a first end fixed to the base at a location aft of the first upright support.
18. The exercise machine of claim 17 , wherein the crankshaft is rotatably coupled to the mast at the intermediate location of the second upright support.
19. The exercise machine of claim 17 , wherein an upper portion of the first upright support and the third upright support are inclined toward a rear side of the exercise machine.
20. The exercise machine of claim 2 , wherein the frame comprises a cantilever fixed to the mast at the location above the first rotation axis and extending rearward toward the rail, and wherein the lift mechanism is suspended from the mast via the cantilever.
21. The exercise machine of claim 20 , wherein the lift mechanism comprises a first end portion including a motor, the first end portion pivotally joined to the cantilever, and a driven portion pivotally joined to the rail, the motor configured to move the driven portion toward and away from the first end portion to raise and lower the rail, respectively.
22. The exercise machine of claim 2 , wherein a length of the base is about 52 inches or less, and wherein the rail is adjustable to at least 20 degrees of incline.
23. The exercise machine of claim 2 , wherein a first end of the reciprocating member is slidably supported on the rail and a second end of the reciprocating member is configured to rotate about the crankshaft when the pedals move along the closed loop path.
24. The exercise machine of claim 2 , wherein the reciprocating member is coupled to the crankshaft via a crank arm.
25. The exercise machine of claim 2 , wherein the pedal is cantilevered from the reciprocating member.