Telescopic type collision energy absorption device for rail vehicle

A rail vehicle, wherein the rail vehicle is mounted with a telescopic type collision energy absorption device for a rail, the device comprises a first tube and a second tube that can telescope within the first tube, the first tube is mounted with a cutting mechanism for cutting an outer wall of the second tube, wherein the energy absorption device comprises a telescopic mechanism connected with the second tube by passing through the first tube, the cutting mechanism comprises a cutter base and cutters mounted on the cutter base;

• when the energy absorption device is in a non-operating state, the telescopic mechanism pulls the second tube in such a way that the second tube is retracted into the interior of the first tube, the cutting mechanism is pressed against the outer wall of the second tube by the cutters;
• and in a state prior to a collision of the vehicle, the telescopic mechanism under an effect of a high-pressure air pushes the second tube in such a way that the second tube is ejected outwards, the cutters are capable of rotating and separating from the second tube, such that the cutters are again pressed, under an effect of a spring force, against locating slots of the second tube ejected outwards, and the cutters of the cutting mechanism cuts the second tube and absorbs energy when the second tube is subjected to an external force and retracts towards the interior of the first tube,
• the energy absorption device is mounted on a rail vehicle driven by a high-pressure air of the rail vehicle itself, or on a tool requiring energy absorption, which requires an additional provision of the high-pressure air;
• and the energy absorption device is automatically controlled by a sensor mounted on the rail vehicle, or controlled manually.