Friction connector for rail transit switch machine

Abstract

The invention relates to the technical field of rail transit equipment and discloses a friction connector for a rail transit switch machine, the machine comprises a base, the top end of the base is fixedly provided with a speed reducing shell, the front part of the base is hinged with a friction braking plate, the inner part of the friction braking plate is provided with an inner gear, and the inner part of the inner gear fixedly sleeves a ball bearing. By arranging a permanent magnet and a electromagnet, when an AC motor is powered off, the electromagnet is electrified to attract the permanent magnet to move oppositely, and a connecting plate compresses an adjusting spring through a cushion cylinder, so that the pressure of the friction braking plate is removed, so as to release the friction connection performance between the friction braking plate and the inner gear, so that the friction braking plate and the inner gear can rotate relatively under the action of inertia force, namely,the friction braking plate and the inner gear can rotate relatively for once after the machine finishes the task of each normal switching action, thereby effectively avoiding the problem that the friction braking plate and the inner gear are difficult to separate after being corroded and bonded due to long-term bonding.

Description

technical field [0001] The invention relates to the technical field of rail transit equipment, in particular to a friction coupling for a rail transit switch machine. Background technique [0002] The switch machine is an important driving control device in the field of rail transit. It is used to reliably change the position of the switch, change the opening direction of the switch, lock the point rail of the switch, and reflect the signal of the position of the switch. According to the action energy and transmission mode, it can be divided into electric switch machines, electro-pneumatic switch machines and electro-hydraulic switch machines. Among them, electric switch machines can be divided into DC switch machines and AC switch machines according to the type of power supply. However, due to the existence of commutators and brushes, DC motors are easily damaged and have a high failure rate. Therefore, AC motors are mostly used as power devices. [0003] In the AC point m...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies in the use of the existing friction couplings in point machines proposed in the background technology, the present invention provides a friction coupling for rail transit point machines, which has inner and outer friction plates that move relative to each other in a timely manner, friction The coefficient is relatively stable, which solves the problem that the inner and outer friction plates are stuck together for a long time and are difficult to separate due to corrosion.

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