A reusable crash energy-absorbing device for rail vehicles

Abstract

The invention provides a reusable collision and energy absorption device for a rail vehicle. The reusable collision and energy absorption device comprises an impacted rod, an outer pipe, a damping structure, a resetting structure and an end part base, wherein the damping structure comprises a damping plug, a guide pipe and a damping elastic element; the resetting structure comprises a resetting piston and a resetting elastic element; the outer pipe is of a tubular structure and the inner part of the outer pipe is separated into a front cavity and a rear cavity through a separation plate; the separation plate is provided with a damping hole with a through hole shape, so that damping fluid can circulate between the front cavity and the rear cavity; at least part of length of the damping plugis arranged in the damping hole when the damping plug is located at an initial position; the damping plug can move along a frontward-backward direction of the device when being impacted; a gap is formed between the radial thickest part of the damping plug and the damping hole and supplies the damping fluid to circulate between the front cavity and the rear cavity. The device provided by the invention has a good energy absorption effect and can be used for reducing injuries to passengers in secondary collision; the device can be repeatedly used so that the cost of the energy absorption devicecan be remarkably reduced.

Description

technical field [0001] The invention belongs to the field of safety devices for rail vehicles, in particular to a reusable collision energy-absorbing device for rail vehicles. Background technique [0002] With the development of rail transit, people pay more and more attention to the safety performance of rail vehicles. The current energy-absorbing structure of rail vehicles is mainly based on metal crushing energy absorption, and the structure cannot be used again after crushing. Its mechanical characteristic curve is generally a jagged wavy line with a large peak value, which has a high trigger threshold requirement, resulting in a large deceleration peak value, which is not conducive to the safety of the occupants. [0003] Invention patents CN201610860262.4 and CN201610115228.4 previously researched by the inventor of the present invention both provide a kind of collision energy-absorbing device for rail vehicles. These collision energy-absorbing devices have achieved ...

AI Technical Summary

Problems solved by technology

However, the shock velocity limits that these types of device structures can withstand and the energy levels they can absorb simply do not meet the relevant requirements in the field of rail vehicles

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