Patent ID: 8167778
Filing Date: 2012-05-01
Classification: A63B

Abstract:
1. A transmission structure of a waist twirling exercise machine for body-building, comprising left and right stepping rods having first ends obliquely connected to two sides of a front end of a machine base, left and right pneumatic cylinders pivotally connected between the left and right stepping rods and the machine base, and a linking mechanism having two ends secured to the left and right stepping rods, the left and right stepping rods compressing the left and right pneumatic cylinders in turn for a damping motion to provide a synchronous stepping and twirling effect, the left and right stepping rods being disposed obliquely for providing left and right swing motions, the transmission structure comprising: the left and right stepping rods having left and right through holes; left and right stepping platforms being pivotable on the left and right stepping rods; left and right transmission members having first ends connected to the left and right stepping platforms and second ends provided with eccentric blocks; left and right connecting rods having first ends connected to the eccentric blocks of the left and right transmission members and second ends pivotally connected to either of the machine base and the pneumatic cylinders; thereby, when a user treads on the left and right stepping platforms in turn for providing left and right swing motions, the left and right connecting rods pushing the left and right transmission members, the left and right stepping platforms being driven to synchronously turn left or right at an angle back and forth to orient in substantially the same direction, the swing motions driving the left and right stepping platforms to synchronously turn to orient in substantially the same direction for enhancing a waist twirling effect.