Transmission wheel series with periodically varied speed ratio and having reciprocally displacing auxiliary pulley for storing/releasing kinetic energy

摘要

The present invention is installed with a unidirectional transmission device at the active side, so when a transmission belt is tightened while the active pulley driving a passive pulley in periodically varied speed ratios, an auxiliary pulley (312) is linked simultaneously so as to form a prestressed force for storing energy, when the force applied by the active pulley to the passive pulley through the transmission belt is zero or relatively smaller, the auxiliary pulley (312) is enabled to release energy for recovering so as to apply force to the transmission belt, because the transmission belt is coupled to the active pulley and/or one end of the active wheel shaft combined with the active pulley is restrained by the unidirectional transmission device, the transmission belt is enabled to link the passive pulley to operate in the original revolving direction for feeding back the kinetic energy.

主权项

1. A transmission wheel series with periodically varied speed ratio comprising:
an active pulley assembly (500) driven by a power source, said active pulley assembly (500) comprising an active wheel shaft (111), an active pulley (112, 113) and a unidirectional rotating transmission device (300), wherein said active pulley (112, 113) is combined with said active wheel shaft (111), said active wheel shaft (111) being configured to input rotational kinetic energy to a machine, said unidirectional rotating transmission device (300) being installed between the active wheel shaft (111) and a machine body (800), wherein said active pulley (112, 113) comprises at least one pulley formed in one of a circular, or bimodal elliptical, or eccentric circular, or eccentric elliptical or eccentric bimodal elliptical shape; a passive pulley assembly (600) comprising a passive wheel shaft (211) and a passive pulley (212, 213, 413), said passive pulley (212, 213, 413) being configured to rotate on the passive wheel shaft (211), wherein said passive pulley (212, 213, 413) comprises at least one pulley formed in one of a circular, or bimodal elliptical, or eccentric circular, or eccentric elliptical or eccentric bimodal elliptical shape; a transmission belt (100) comprising a chain or a tooth-shaped transmission belt for linking the active pulley assembly (500) and the passive pulley assembly (600) to cause the passive pulley (212, 213, and 413) to rotate in response to rotation of the active pulley (112, 113), wherein as a result of different shapes or eccentricities of the active pulley (112,113) and the passive pulley (212, 213, 214), a speed ratio between the active pulley (112, 113) and the passive pulley (212, 213, 413) varies periodically during rotation of the active pulley (112, 113), and wherein the wheel set comprises at least one of (a) a chain-shaped transmission belt and a chain wheel and (b) a tooth-shaped pulley and a tooth-shaped transmission belt; and an auxiliary pulley assembly (700) configured to store and release kinetic energy comprising at least one auxiliary pulley (312) and at least one auxiliary wheel press helve (301), said auxiliary pulley (312) being configured to apply a prestress force to a portion of the transmission belt (100) between the passive pulley (212, 213, 413) and the active pulley (112, 113) so that as a speed ratio between the active pulley (112, 113) and the passive pulley (212, 213, 413) varies periodically during rotation of the active pulley (112, 113), a tightness of the transmission belt is varied correspondingly wherein: when the transmission belt (100) is gradually tightened during a rotation of the active pulley (112, 113), the auxiliary wheel press helve (301) is displaced for storing energy by having the transmission belt bear against the auxiliary pulley, and when the transmission belt (100) is gradually loosened during the driving of the passive pulley (212, 213, 413) by the active pulley (112, 113), the auxiliary wheel press helve (301) is configured to have an energy releasing displacement to bear the auxiliary pulley (312) against the transmission belt, so that the auxiliary pulley assembly (700) is configured to perform an energy releasing drive by bearing against the transmission belt to (100) to maintain the linking between the passive pulley (212, 213, 413) and the active pulley (112, 113) in the original rotating direction.