Adjustable stride elliptical motion exercise machine with large stride variability and fast adjustment

摘要

Elliptical exercise machines with a footskate on a reciprocating rail that provides for the ability to alter the horizontal stride of the user utilizing the machine, without significantly altering their vertical stride height on the machine. This is generally performed by altering the angle through which any point on the rail can, and does, move. Such adjustment may be performed by having the rail attached to a swing arm, where the arc of rotation of the swing arm relative to the frame is altered.

主权项

1. An adjustable stride elliptical exercise machine comprising:
a frame comprising:
a base; anda vertical riser extending away from said base; a stride mechanism comprising:
a swing arm rotationally connected at a first end to said vertical riser at a position spaced from said base so that said swing arm has an arc of rotation about a pivot axis relative to said vertical riser;a crankshaft having a crank arm;an elongated rail moveably positioned on said crank arm, a first end of said rail being rotationally attached to a second end of said swing arm said second end of said swing arm being spaced from said first end of said swing arm; anda footskate mounted on said elongated rail; and an adjustment mechanism comprising:
a push bar rotationally attached at a first end to said crank arm and rotationally attached at a second end, spaced from said first end of said push bar, to a first end of a sleeve bar, said sleeve bar being rotationally connected at a second end, spaced from said first end of said sleeve bar, to a first end of an adjustment bracket, a second end of said adjustment bracket, spaced from said first end of said adjustment bracket, being rotationally attached to said vertical riser;a sleeve slideably attached to said sleeve bar, said sleeve also being rotationally attached to said swing arm; anda drive screw screwably connected to a nut, said nut being rigidly attached to said adjustment bracket; wherein, rotation of said drive screw causes said adjustment bracket to rotate relative said vertical riser, which in turn causes said sleeve to slide on said sleeve bar; and wherein sliding said sleeve on said sleeve bar causes said arc of rotation of said swing arm to be altered.