Crane and work machine

A crane arrangement, comprising:

• a crane;
• and
• a base for attaching the crane to a work machine;
• the crane comprising:
• a pillar boom attached rotatably to the base,
• a lifting boom comprising a first end and a second end, a hollow cast connecting piece arranged at the first end of the lifting boom, and a welded hollow box structure connected to the hollow cast connecting piece and including the second end of the lifting boom, wherein both the hollow cast connecting piece and the welded hollow box structure include connector surfaces joining each to the other, the lifting boom being pivoted at the first end to the pillar boom;
• a folding boom comprising two ends, the folding boom being pivoted at the second end of the lifting boom to suspend a tool from the crane;
• a lifting cylinder comprising a third end and a fourth end, the lifting cylinder being pivoted at the third end in connection with the pillar boom and at the fourth end to the lifting boom to operate the lifting boom,
• a folding cylinder comprising a fifth end and a sixth end, the folding cylinder being pivoted at the fifth end to the lifting boom and at the sixth end pivoted to the folding boom to operate the folding boom,
• wherein the hollow cast connecting piece comprises a first pivot point connecting the pillar boom to the lifting boom and receiving moments acting on the lifting boom, a second pivot point connecting the lifting cylinder to the lifting boom, and a third pivot point connecting the folding cylinder to the first end of the lifting boom and wherein at least the first pivot point, the second pivot point and the third pivot point are arranged at the hollow cast connecting piece and the hollow cast connecting piece includes an opening for routing conductors through the hollow cast connecting piece into the welded hollow box structure of the lifting boom, wherein the opening in the hollow cast connecting piece is arranged in a surface of the hollow cast connecting piece between the first pivot point and the third pivot point and a plane of the surface surrounding the opening is parallel to axes of rotation of the fisrt, second and third pivot points to provide open access to the welded hollow box structure at the first end of the lifting boom;
• and
• wherein the pillar boom comprises a fork attaching the pillar point to the first pivot point around the connecting piece.