| 摘要 |
[Summary] [Problem] To provide a load compensation device which can compensate loads on a working arm, and has excellent safety and durability. [Means of Resolution] A working arm 104 is supported by a first pivot-mounting part 103 on a supporting body 102, an actuator cylinder 105 is supported by a second pivot-mounting part 107 above the first pivot-mounting part 103, and a piston rod 108 of the actuator cylinder 105 is linked to a third pivot-mounting part 109 of the working arm 104. A piston rod 112 of a compensation cylinder 110 is linked to a movable frame 113, and a piston 112A of the compensation cylinder 110 is urged upward by means of a compression coil spring 114 which pushes the movable frame 113 upward. The actuator cylinder 105 and the compensation cylinder 110 are linked by the inside of a conduit 115, and when the working arm 104 is pivoted, the displacement of the piston of the actuator cylinder 105 urges the piston of the compensation cylinder 110, a torque which balances the load torque of a load W on the working arm 4 is generated, and a balanced state is maintained regardless of the angle of the working arm 104. |
