Elastic knocking device for track fastener detection trolley

Abstract

For acquiring the ideal flexible torsion vibration state of a track, the invention provides an elastic knocking device synchronously moving with a track detection trolley in a running state of certain speed. The device is provided with a driving motor, and an up-and-down reciprocating oscillation knocking head is arranged on the output shaft of the motor. A crank drives a connecting rod, so that a swinging rod carries out bidirectional periodical swing; through an elastic arm arranged on the swinging rod, the knocking head generates an inertial impact force for knocking a steel rail, and the magnitude of the knocking force can be adjusted through an adjusting bolt; and the elastic knocking device continuously knocks the track in the running process, so that the track is in a continuous and stable periodic flexible torsion vibration state, and the stability of vibration signal transmission is kept all the time.

Description

technical field [0001] The invention is applicable to the field of track safety detection, especially to the field of safety detection of track fasteners. An elastic percussion device that produces bending and torsional vibrations. Background technique [0002] There is no structure or method similar to this device to generate bending torsional vibration on the track in the moving state. An electromagnetic exciter can knock the track to vibrate, but has the following disadvantages: 1. The amplitude and force of the knocking will weaken as the vibration frequency increases. 2. The percussion is a rigid percussion, the contact time between the percussion head and the rail surface is relatively long, and the relative friction is relatively large. The impact of these shortcomings on the vibration of the track is fatal, because the measurement frequency of the loosening of the track fastener is very high, and the decay period is extremely small. During the moving and knocking p...

AI Technical Summary

Problems solved by technology

An electromagnetic exciter can knock the track to vibrate, but it has the following disadvantages: 1. As the vibration frequency increases, its knocking amplitude and knocking force will weaken

2. The percussion is rigid percussion, the contact time between the percussion head and the rail surface is longer, and the relative friction is relatively large

The impact of these shortcomings on the vibration of the track is fatal, because the measurement frequency of the loosening of the track fastener is very high, and the decay period is extremely small. During the moving and knocking process of the electromagnetic exciter, the track amplitude will be weakened and the decay period will be shortened due to the long contact time. , so that the vibration signal that can determine the loosening of the rail fastener cannot be collected

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