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

摘要

The present invention is to installed a unidirectional transmission at the active side, so when a transmission belt is tightened while the active pulley driving a passive pulley in periodically varied speed ratios, meanwhile an auxiliary pulley (312) is linked for storing energy to form a prestressed force, 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 device (300) having 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 the machine or between the active pulley assembly (500) and the machine, 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 revolve 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), wherein the wheel set comprises at least one of a chain-shaped transmission belt and a chain wheel, or a tooth-shaped pulley and a tooth-shaped transmission belt; and an auxiliary pulley assembly (700) configured to store and release kinetic energy comprising a reciprocally displacing auxiliary pulley (312) for storing and releasing kinetic energy and an auxiliary wheel press helve (301) having one end coupled to the machine and the other end coupled to the auxiliary pulley (312), said auxiliary wheel press helve (301) comprises at least one of a plate-shaped helve having a spring function, a swingable support arm structure, and/or a prestressed energy storing and releasing spring installed between the press helve and the machine, wherein said auxiliary pulley (312) is configured to bear prestress force to a portion of the transmission belt (100) between the passive pulley (212, 213, 413) and a location where the active pulley (112, 113) is released from the transmission belt (100) so that when the active pulley of the active pulley assembly periodically drives the passive pulley of the passive pulley assembly at varied speed ratios, 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) to drive the passive pulley (212, 213, 413), 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) so that when force applied by the active pulley (112, 113) to the passive pulley (212, 213, 413) is zero or lower than a force applied during the tightening of the transmission belt, the auxiliary wheel press helve (301) is configured to have an energy releasing displacement to bear the auxiliary pulley (312) against the portion of the transmission belt near the passive pulley to pull the active pulley (112, 113) and the passive pulley (212, 213, 413) in the original rotating direction by the rotational direction restraining of the unidirectional rotating transmission device (300) so as to perform an energy releasing drive for feeding back the kinetic energy, wherein the speed ratio of driving the passive pulley is varied periodically, and wherein the transmission wheel series with periodically varied speed ratio is configured so that a non-releasing synchronous transmission relation is formed between the transmission belt and the active pulley assembly and the passive pulley assembly to form a non-sliding synchronous transmission wheel set.