| 摘要 |
A device ( 1 ) that compensates the weight of a suspended load, for example a tool or welding tongs, is provided as a spring tensioner with at least one barrel ( 4 ) or supporting wire that can be reeled off a barrel ( 3 ) against the force of a spring ( 2 ). The barrel ( 3 ) is supported on a shaft ( 6 ), to which the spring ( 2 ) engages directly with its interior end or via a sheath connected to the shaft ( 6 ), while the opposite exterior end of the spring ( 2 ) is mounted to the barrel ( 3 ) at the inside. A shaft drive ( 7 ) can be activated to change the pull force at the spring ( 2 ) via the shaft ( 6 ). The spring ( 2 ) is connected to the shaft drive ( 7 ) or to a drive wheel ( 8 ) allocated thereto via a freewheel. The freewheel is embodied with a catching latch arrangement ( 9 ) which, in the blocking direction has at least three or four latches ( 10 ) that simultaneously engage the recesses or catching recesses ( 11 ) which receive them, said latches being arranged at the inside at a circular drive wheel ( 12 ) allocated to a drive wheel ( 8 ). An interior body ( 13 ) of the catching latch arrangement located inside the circular drive wheel ( 12 ) supports the latches ( 10 ) and is simultaneously a part of a slide bearing for the circular drive wheel ( 12 ) for rotation in the freewheel direction. In this way, in a small space strong forces can be transferred.
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