Patent ID: 8282535

Claim:
A treadmill roller structure for a treadmill, comprising: a motor, wherein the motor is an out-runner motor having a spindle and a power output section, wherein the power output section the spindle; a gear set rotatably installed onto the spindle, wherein the power output section is engaged to the gear set; and a case, wherein the gear set is engaged to the case, causing the case to rotate about the spindle; wherein the case has an accommodation housing fixed at a periphery thereof and an inner gear ring, wherein the inner gear ring is fixedly installed onto an inner wall of the accommodation housing, the motor and the gear set are placed in the accommodation housing, the gear set is engaged with the inner gear ring, and the accommodation housing brings the case to rotate relatively to the spindle; wherein the case is externally installed with another motor, in which the motor and the installed another motor are respectively placed at the two ends of the case.