| 摘要 |
PURPOSE:To obtain retracting and turning movement simultaneously or alternatively by connecting plural arms freely shakingably, giving degree of freedom to the supporting direction of an antenna, assembling one motor in the arm and delivering selectively the torque of the motor by a clutch. CONSTITUTION:The retracting movement of the antenna 2 is obtained by giving the turning movement to the 1st arm 3 around a horizontal shaft 8 and the turning movement (turning movement around the vertical shaft) of the antenna 2 is obtained by turning the 2nd arm 4 to the 3rd arm 5. The torque of the motor shaft 14 of the drive motor 13 is given to the shaft 8 with a large gear reduction ratio via a drive shaft 16, bevel gears 17, 22, a gear reducer 25, and gears 26, 27 in the drive source of the movements and given to the 2nd arm 4 via gears 19, 33, a gear reducer 31, an output shaft 36, and gears 37, 38. The elevating angle and turning angle are set by using clutches 23, 24. |
