| 摘要 |
The invention relates to a crane comprising bogie structures ( 3 ) in the corners of the crane, a tandem drive wheel and idle wheel ( 8, 9 ) arranged in each bogie structure and provided to turn in the bogie structure offset from their vertical axes, and a turning device arrangement ( 15, 16 ) provided between each wheel pair for turning the wheel pair in cooperation to a selected position, the turning device arrangement comprising at least two turning rods ( 15, 16 ) connecting the wheels, which turning rods are connected to counterparts ( 17, 18, 19, 20 ) provided for each turning position or function in load-bearing structures ( 10, 11 ) of the wheels ( 8, 9 ) and turning along therewith, whereby at one wheel the position of the turning rods or the counterparts in the load-bearing structure is slidable around the load-bearing structure, yet the one of the counterparts or turning rods that corresponds to the selected turning position may be locked with a locking mechanism ( 21, 22, 23, 24 ) immobile with respect to the load-bearing structure for enabling wheel turning.
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