SU585346A1 - Electromagnetic brake - Google Patents

Description

I

The invention relates to mechanical engineering mainly to devices for quenching the kinetic energy of moving parts of machines and mechanisms that perform plane-parallel motion.

Brake devices are known for rapidly and smoothly reducing the speed before stopping and reversing the mechanism, comprising a cavity with a metal filling in the form of balls and a moving element associated with the moving part of the brake mechanism.

The disadvantage of these brakes is the constancy of the law of inhibition to the low durability of the filler.

Also known is an electromagnetic brake comprising an electromagnet, a housing mounted on the cutting of an electromagnet, and a movable element associated with the braking mechanism 1 2.

The disadvantage of this brake is the law of inhibition.

The aim of the invention is to achieve a smooth change in braking force at

linear mixing of the rolling element.

This is achieved by the fact that the movable element is made in the form of a plate of variable width, installed along the body, and in section the plate has the shape of a wedge with a tip directed towards the linear movement of the movable element.

FIG. 1 shows the proposed electromagnetic brake; in fig. 2 - A-A in FIG. one.

In the dissection of the core of the electromagnet 1, a housing 2 is installed, made of non-magnetic material. Along the casing filled with ferromagnetic powder 3, a plate 4 of variable width, which is fixed on a nonmagnetic rod 5, is positioned, able to move without turning around its axis under the action of the decelerating mechanism. Return of the moving part to the ele &. the magnetic brake is reset to its initial position by a spring 6, which is activated when the coil 7 of the electromagnet 1 is disconnected

The electromagnetic brake is powered from a constant current source, and the voltage is applied by adjusting co-Topoix) according to the law of varying braking force (in time).

When a voltage is applied to the coil 7 of the electromagnet 1, a ferromagnetic Po-1msk 3 is excited in the brake housing 2 and

On} a photon bridge, orienteering 1) 1st along the magnetic field lines of force (across the travel of the moving element of the electromagnetic brake). When acting on the rod 5 of the movable part of the brake mechanism, the latter encounters more opposition from the brake than 6onbuie coil current 7 and the area of the working part of plate 4. In the cream of displacement of the rod 5, the braking force also changes with changing current in the coil 7. Thus, by ensuring a certain law of change in current, the corresponding regularity in the change in TOJV of a brain force over time is obtained.

As a function of the path, the braking force varies depending on the shape of the plate 4.

During the reverse course of the brake mechanism, the coil 7 is disconnected from the power source and the spring 6 returns the movable element of the brake to its original position. The presence of a counter spring 6, stiff

the bone of which is chosen according to

from the required braking effort, allows you to expand the possibility of adjusting the njie CH of the device.

The application of the proposed brake allows to increase the durability of the filler and ensure smooth adjustment of the braking force both in time and along the braking path.

Claims (2)

1. Journal of Youth Technique, No. 7, 1974, p. eleven. 2. The patent of France N 244447, cl. Р 16 D 27/00, 1971. F t one/ fg A A