Tread sweeper

Abstract

The invention discloses a tread sweeper. The sweeper comprises a brake head, a cylinder and a piston rod. The brake head is provided with a connecting end and a mounting end; a brake shoe is installedat the mounting end, one end, provided with a piston, of the piston rod is arranged in the cylinder in a sealed and sliding mode, an inner cavity of the cylinder is divided into a rod cavity and a rodless cavity through the piston, an air inlet hole connected with the rodless cavity is formed in the inner wall of the cylinder, and an extending end of the piston rod is movably connected with the brake head; and a sliding groove is formed in the end surface of the extending end, an connecting end extends towards the piston end and extends into the sliding groove, and a pre-tightening mechanismfor applying an axial thrust to the connecting end is arranged between the bottom surface of the sliding groove and the end surface of the connecting end. The brake head is pressed through thrust of the pre-tightening mechanism, a friction resistance is provided for rotation of the brake head, and therefore the brake head is locked in a relieving state, gaps between the upper end and the lower endof the brake shoe and a wheel set tread are kept uniform, and the brake shoe is prevented from being attached to the wheel set tread.

Description

technical field [0001] The invention relates to the technical field of components for rail transit foundation braking systems, in particular to a tread cleaner. Background technique [0002] Tread sweeper is a device for cleaning wheel tread on rolling stock. The principle is: when cleaning the brake, the compressed air pushes the piston, the brake shoe support and the brake shoe to contact the wheel tread in turn to produce a cleaning and braking action. [0003] Under different vehicle load conditions, the frame and the wheel set will have vertical relative displacement, and the tread cleaner installed on the frame will also have a vertical displacement with the wheel set accordingly. In order to make the brake shoe close to the tread surface of the wheel set during cleaning and braking, the brake shoe holder and the piston are usually connected in a hinged manner, such as Chinese utility model patent CN201220479124. [0004] At present, the common problem of tread clean...

AI Technical Summary

Problems solved by technology

[0004] At present, the common problem of tread cleaners is: in the relief state, the brake shoe holder will rotate around the connection end under the action of its own total amount and vibration, and the upper end of the brake shoe will abut against the tread of the wheel set, causing the brake shoe and the wheel set to The wheel-to-tread surface is abnormally heated due to long-term contact with the tread surface, which in turn affects the wheel-rail adhesion coefficient and ultimately affects the safe operation of the rolling stock

[0005] Another relatively common problem is that after the tread cleaner has been in operation for a period of time, the upper and lower sides of the brake shoe appear to be eccentrically worn.

The phenomenon of eccentric wear of brake shoes seriously affects the service life of brake shoes and causes waste of resources

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