The invention discloses a crane and a main girder thereof. The main girder of the crane comprises multiple main girder subsections; the multiple main girder subsections are sequentially and fixedly connected in a detachable manner to form the main girder of the crane; and when fixed connection between two adjacent main girder subsections is broken, the two main girder subsections can stretch and contract for adjustment, so that the length of the main girder of the crane is adjusted. The length of the main girder of the crane disclosed by the invention can be adjusted in a certain range, so that the adjustment requirement on the span of the crane is met; meanwhile, produced main girders of cranes can be upgraded and improved by adopting the structure disclosed by the invention; and under the premise that safety is ensured, the length of the main girder can be adjusted appropriately.
Crane and main girder thereof
2016-01-13
Patent
Elektronische Ressource
Englisch
IPC: | B66C Krane , CRANES |