| 摘要 |
An oscillating drive mechanism for an air discharge nozzle, which is mounted for pivotal movement about an axis. The discharge nozzle includes end plates, each having a pivot pin extending along the pivot axis. One end plate has an elongated slot therein spaced from the pivot pin. The pivot pins are supported at opposite ends by support structure, which allows pivotal movement of the nozzle about the axis. The support structure adjacent one end includes an opening therethrough spaced from the axis and configured such that the elongated slot and one end plate will sweep across the opening as the air discharge nozzle pivots through a predetermined desired arcuate sweep. A drive motor having a drive axis is attached on the opposite side of the support structure, opposite the through opening. A drive mechanism is disposed in the opening. The drive mechanism is coupled to the drive motor on one side thereof and has a drive pin on the other side thereof, which is driven in an orbiting pattern around the motor drive axis. The drive pin is configured to engage the elongated slot in the end plate and to traverse the slot in alternating directions as the motor rotates the drive mechanism to thereby cause the air discharge nozzle to oscillate through the predetermined arcuate sweep. |
