Height adjusting mechanism for a pedaling device of a pedal exerciser

Abstract

A pedal exerciser includes a base having a coupling tube extending substantially vertically from a bottom of the base. The coupling tube includes a coupling hole and a first notch extending vertically and in communication with the coupling hole. A pedaling device includes a column having a rack. The column is received in the coupling hole of the base. The rack is received in the first notch and has a toothed portion extending outside of the first notch. A height adjusting mechanism includes a motor and a reduction gear box having an output shaft driven by the motor. A transmission gear is mounted on the output shaft and meshes with the toothed portion of the rack. The motor is operable to drive the output shaft to move the rack in a vertical direction via the transmission gear, adjusting a height of the pedaling device in the vertical direction.

1 . A pedal exerciser comprising:
 a base adapted to be located on a ground, with the base including a coupling tube extending substantially vertically from a bottom of the base, with the coupling tube including a coupling hole and a first notch extending vertically and in communication with the coupling hole;   a pedaling device adapted to be rotated by legs or hands or a user, with the pedaling device including a column on a lower portion thereof, with the column including a rack having a toothed portion, with the column received in the coupling hole of the base, with the rack received in the first notch, with the toothed portion extended outside of the first notch;   a height adjusting mechanism including a motor, with the motor adapted to be controlled by a controller, with the height adjusting mechanism further including a reduction gear box having an output shaft driven by the motor, with a transmission gear mounted on the output shaft and meshed with the toothed portion of the rack, with the motor operable to drive the output shaft to move the rack in a vertical direction via the transmission gear, adjusting a height of the pedaling device in the vertical direction.   
     
     
         2 . The pedal exerciser as claimed in  claim 1 , with the base including a seat on a rear end thereof, with the height adjusting mechanism further including a sleeve and a coupling seat, with the sleeve having a bottom portion received in the coupling hole of the base, with the column received in the sleeve, with the sleeve having a second notch, with the rack received in the second notch, with the coupling seat mounted around an upper portion of the sleeve, with the coupling seat including a coupling section coupled with the reduction gear box, with the coupling section including a compartment, with the transmission gear rotatably received in the compartment, with the compartment including an opening facing the second notch, with the column of the pedaling device extending through the sleeve and the coupling hole of the coupling tube of the seat, with the transmission gear meshed with the rack via the opening of the compartment. 
     
     
         3 . The pedal exerciser as claimed in  claim 1 , with the coupling seat further including a third notch, with the coupling seat further including a first tightening bolt hole in a location corresponding to the opening of the compartment and a second tightening bolt hole in a location corresponding to the third notch, with first and second tightening bolts mounted in the first and second tightening bolt holes.