Patent ID: 8646578
Filing Date: 2014-02-11
Classification: B66F

Abstract:
1. An extendable mast structure for a fork-lift truck, comprising: an outer mast having spaced columns, wherein the outer mast is fixed to a carriage and the spaced columns are interconnected with via an upper and a lower traverse; an extendable inner mast having columns, wherein the inner mast is guided by said outer mast a load-carrying member is on said inner mast guided to be movable up and down, and the columns of the inner mast are interconnected via an upper and a lower traverse; one mast lift cylinder for each of said columns inner mast, wherein each mast lift cylinder is supported on said outer mast; and a setting member for an adjustment of lift, said setting member being disposed between at least one of said mast lift cylinders and said outer mast; wherein said setting member comprises: a setting component which has a male thread and is mounted at a lower end of one of said mast lift cylinders, and a bushing which has a female thread screwed onto the male thread and which is supported on said lower traverse of said outer mast; characterized in that said bushing has a clamping member for securing said bushing on said setting component; characterized in that said bushing is split and a locking screw is provided to tighten said bushing on said setting component.