Patent ID: 8231103
Filing Date: 2012-07-31
Classification: F16H,F16K,G05D,H02K

Abstract:
1. A flow control valve comprising: a motor assembly including a first motor that has a first power transmission shaft and rotates in one direction and a second motor that has a second power transmission shaft and rotates in the opposite direction of the first motor; a gear assembly including a first planetary gear configured to receive power from the first motor, a second planetary gear configured to receive power from the second motor, a sun gear that is disposed between the first planetary gear and the second planetary gear and engaged with the first and second planetary gears, a first clutch structure located between the first planetary gear and the first motor, and a second clutch structure located between the second planetary gear and the second motor, wherein the first and second clutch structures are configured to transmit or stop power; a valve actuator including a moving shaft that reciprocates up and down by a rotation of the sun gear, and a valve unit that is fitted on a lower portion of the moving shaft; wherein the first clutch structure comprises: a first plurality of locking portions protruding from the first power transmission shaft; a first plurality of continuous saw tooth-shaped protrusions positioned on an upper side of the first planetary gear; and a first plurality of bottoms, formed on a lower side of the first plurality of continuous saw tooth-shaped protrusions, between the first plurality of continuous saw tooth-shaped protrusions; wherein the second clutch structure comprises: a second plurality of locking portions protruding from the second power transmission shaft; a second plurality of continuous saw tooth-shaped protrusions positioned on an upper side of the second planetary gear; and a second plurality of bottoms, formed on a lower side of the second plurality of continuous saw tooth-shaped protrusions, between the second plurality of continuous saw tooth-shaped protrusions; wherein the first plurality of continuous saw tooth-shaped protrusions and the second plurality of continuous saw tooth-shaped protrusions include a slope that is formed between an apex of a top of each protrusion and each bottom; wherein the first and second clutch structures are configured such that power is transmitted when each locking portion is located on the bottom, and power is blocked when each locking portion is located on the slope.