Exercise bike

A rotor for an exercise bike, comprising:

• a hub configured to be rotatably mounted on the exercise bike;
• a plurality of blades fixed to the hub at a proximal end and extending outward from the hub to a distal end, wherein each of the plurality of blades has first major surface configured to be a trailing surface in a direction of travel of the blade and a second major surface opposite the first major surface and configured to be a leading surface in a direction of travel of the blade, wherein each of the plurality of blades comprises:
• a first section extending along a longitudinal direction from the proximal end toward the distal end, wherein the first section has a central portion that is elongated along the longitudinal direction and has a flat profile, such that the first and second major surfaces are flat at the central portion;
• a second section extending from the first section to the distal end, wherein the second section has a curved profile along the longitudinal direction, such that the first major surface has a convexly curved profile and the second major surface has a concavely curved profile;
• and
• a mount connected to the first section and fixed to the hub;
• wherein the first section of each of the blades further has an outer portion that is elongated along the longitudinal direction and offset from the central portion in a direction perpendicular to the longitudinal direction, and a step portion extending from the central portion to the outer portion, such that the outer portion extends from the step portion to a first outer edge of the blade, and the step portion forms angles with the central portion and the outer portion;
• and
• wherein the central portion, the outer portion, and the step portion extend continuously from the first section through the second section to the distal end of each of the blades.

An exercise bike comprising:

• a frame configured to rest on a ground surface;
• a pedal assembly mounted on the frame;
• a rotor mounted on the frame and configured for rotation about a rotation axis, the rotor operably connected to the pedal assembly to power rotation of the rotor, wherein the rotor comprises a hub with a plurality of fan blades extending radially outward from the hub;
• a rotor cover mounted on the frame and at least partially enclosing the rotor within a chamber defined by the rotor cover, the rotor cover having a first side portion and a second side portion on an opposite side of the rotor from the first side portion, a middle portion extending between the first and second side portions and circumferentially around at least a portion of the rotor, and an upper rear opening to the chamber located in the middle portion;
• an air shield connected to an outer side of the rotor cover and positioned outside the chamber, the air shield configured for selectively covering a portion of the upper rear opening to control a flow of air displaced by the rotor through the upper rear opening.

An exercise bike comprising:

• a frame configured to rest on a ground surface;
• a pedal assembly mounted on the frame;
• a rotor mounted on the frame and configured for rotation about a rotation axis, the rotor operably connected to the pedal assembly to power rotation of the rotor, wherein the rotor comprises a hub with a plurality of fan blades extending radially outward from the hub;
• a rotor cover mounted on the frame and at least partially enclosing the rotor, the rotor cover having a first opening on a first side of the rotor cover and a second opening on a second side of the rotor cover opposite the first side;
• a variable resistance assembly comprising:
• a first fixed baffle positioned adjacent to the first opening, wherein the first fixed baffle has a plurality of first air passages;
• a first moveable baffle that is moveable to cover a selectable portion of the plurality of first air passages to control airflow through the first air passages, thereby selectively restricting air passage through the first opening, wherein the first moveable baffle has a first disc-shaped body with a substantially circular outer profile, with a first gap extending from the outer profile to one of the first air passages;
• a second fixed baffle positioned adjacent to the second opening, wherein the second fixed baffle has a plurality of second air passages;
• and
• a second moveable baffle that is moveable to cover a selectable portion of the plurality of second air passages to control airflow through the second air passages, thereby selectively restricting air passage through the second opening, wherein the second moveable baffle has a second disc-shaped body with a substantially circular outer profile, with a second gap extending from the outer profile to one of the second air passages;
• and
• an actuator connected to the first moveable baffle and the second moveable baffle and configured for manipulation by a user to move the first and second moveable baffles, wherein the actuator is connected to the first moveable baffle on both sides of the first gap and extends across the first gap, and the actuator is connected to the second moveable baffle on both sides of the second gap and extends across the second gap.