RU2324997C1 - Elecromagnetic switching device - Google Patents

Abstract

FIELD: electric engineering.

SUBSTANCE: electromagnetic switching device contains body equipped with straight-traversing electromagnet with E-type keeper and core furnished with making coil on middle core, block with fixed contacts, keeper hinged cross-arm with moving contacts, return spring, dampers pivotally connected with core through the latter and cover fixed on block. Device body is thin-walled and upper part of coil former is furnished with longitudinal edge flanges adjusted in dips of upper part of body side walls and with fixed flanges of block side walls. Lower part of coil former is mounted on dampers with flanges on upper edge and located on side walls of core base.

EFFECT: reduction of dimensions, weight and materials consumption.

4 cl, 8 dwg

Description

The invention relates to the field of electrical engineering and can be used in the construction of electromagnetic relays, contactors and starters.

There are many designs of electromagnetic devices with laced W-shaped forward-flow electromagnets of alternating current, in which the contact system is installed above the magnetic system. Such devices include, for example, starters of the PME-200 and PMA-3100 types, the design of which is unified among themselves and they differ only in the size of the contacts. These starters [1] contain a plastic case (base), a core with a coil installed inside the case, an anchor pivotally connected to the traverse with movable bridge contacts and contact springs installed in it, a block with fixed contacts and an arcing chamber mounted on the said block .

The disadvantages of these starters are large dimensions, weight and material consumption.

The closest to the proposed device in technical essence and the achieved result is an electromagnetic switching device (starter) of the PML-4100 type [2], containing the base in the form of a metal panel on which a switching coil is installed. The terminals of the apparatus are made in the form of plates, the flexible conductors of the coil leads are soldered to them, while the coil and the terminals of the apparatus are sealed together in a premix, which is the body of the apparatus. The core is fixed to the panel using rubber shock absorbers fixed on the core using axles and special bends made on the panel and pressing the shock absorbers. A block with fixed contacts, which also serves as an arcing chamber, together with a switching coil is fixed with two screws on a metal panel. The anchor of the electromagnet is pivotally connected to the traverse with the help of an axis, which serves as the guide of the traverse and moves in special grooves of the block with fixed contacts. On top of the block (interrupter chamber) is a cover that is attached to the block with two screws.

The disadvantages of this apparatus design are the large dimensions, weight and material consumption, since in this apparatus the coil is pressed into the premix during manufacturing, which increases the overall dimensions of the entire apparatus.

The objective of the invention is to reduce the size, weight and material consumption.

The problem is achieved due to the fact that in the electromagnetic switching apparatus containing the housing, in which there is a linear electromagnet with a W-shaped armature and a core, on the middle core of which there is a switching coil, a block with fixed contacts, which is also an arcing chamber, a traverse with movable contacts pivotally connected to the armature, return springs, shock absorbers connected to the core by means of axes passing through the core, and a cover fixed to the block, cor the apparatus pus is made thin-walled, and the upper part of the frame of the including coil is made with longitudinal protrusions at the edges installed in the recesses of the upper part of the side walls of the housing and fixed protrusions of the side walls of the block, while the coil is mounted on shock absorbers that are located on the sides of the core base. It is the execution of the coil frame with longitudinal protrusions that allows you to fix the inclusion coil in the apparatus between the side walls of the thin-walled case and the shoe without any additional fasteners and significantly reduce the dimensions of the apparatus, without using a premix, the amount of materials necessary for the manufacture of the reduced coil frame is reduced.

In addition, the shock absorbers are made not continuous, but with protrusions on the upper and outer side faces, the base of the housing is made with sockets on the sides, and the lower part of the coil frame is made with recesses, while the shock absorbers are mounted on their side protrusions in the sockets of the base of the housing, and the coil through recesses on the lower part of the frame is fixed on the upper protrusions of the shock absorber. The use of shock absorbers of the proposed shape and their location provide not only material savings, but also high mechanical wear resistance of the apparatus.

Also, grooves are made in the upper part of the coil frame, in which the flexible conductors of the coil leads are laid, while the device leads are made in the form of conductive metal staples and are installed in the nests of the device casing in its upper part relative to the working position.

In order to exclude fasteners for installing and fixing the apparatus cover on the block, the apparatus cover is made with two elastic elements made integrally with it, located on each of two opposite sides and rigidly fixed in grooves made on the edges of the block insulating poles.

The technical result provided by the above set of essential features consists in creating an electromagnetic switching apparatus of a simplified design with reduced weight and dimensions and material consumption, convenient to maintain during operation.

The proposed electromagnetic switching device is presented in the drawings, where:

figure 1 shows an electromagnetic switching device, a longitudinal section;

figure 2 - electromagnetic switching apparatus, General view;

figure 3 - including coil with conclusions;

figure 4 - the apparatus, top view;

figure 5 - shock absorber;

figure 6 - core;

Fig.7 - case with installed in it a core and a switching coil;

in Fig.8 - block (interrupter chamber).

The electromagnetic switching device contains a housing 1 made of a thin-walled thermoplastic material by injection molding, a W-shaped magnetic system with a core 2, on the middle core of which is installed a switching coil 3, shock absorbers 4, an anchor 5, a block (arc chamber) 6, on which fixed contacts 7 and arc brackets 8, a cross-arm 9 pivotally connected to the armature using the axis 10, movable bridge contacts 11 and contact springs 12, a cover 13 and return springs 14 are mounted. len to the housing with screws 15. On each fixed contact 7 is mounted a bracket 16 in the form of a clamp with a threaded hole, in which a screw 17 with a slot for connecting client wires of the power circuit is installed.

The upper part of the frame 18 of the coil 3 is made with longitudinal protrusions 19 at the edges, which are installed in the recesses 20 of the upper part of the side walls of the housing 1 and are fixed by the protrusions 21 of the side walls of the shoe 6. In addition, grooves 22 are made in the upper part of the frame 18 of the coil 3, in which flexible conductors 23 of the conclusions of the coil 3 are laid, while the conclusions of the apparatus are made in the form of conductive metal brackets 24, fixed in plastic pads 25, ensuring safety of service, and installed in the slots 26 of the apparatus 1 in its upper portion with respect to the operating position.

Shock absorbers 4 are made with protrusions 27 on the upper side and protrusions 28 on the outer side face, mounted on the sides of the core 2 with the help of axes 30, rivet heads 31 and fixed in the base of the housing 1 through the protrusions 28, which are installed in the sockets 32 made in the base case 1. The lower part of the frame 18 of the coil 3 is made with recesses 33, with which the coil 3 is installed on the upper protrusions 27 of the shock absorbers 4.

The cover 13 is mounted on the block 6 using elastic snap-on elements 34 made on two opposite sides of the cover 13, sealed with it, and fixed in the grooves 35 of the block 6, which are located on the ribs 36, insulating poles. The elasticity of the snap elements 34 is provided by making the lid 13 of thermoplastic material.

The device operates as follows.

When power is applied to the switching coil 3, the anchor 5 is attracted to the core 2, the movable bridge contacts 11 are closed with the fixed contacts 7 due to the movement of the beam 9 connected to the armature 5 using the axis 10. To reduce the vibration of the movable bridge contacts 11 and cancel the energy of the moving armature 5, shock absorbers 4 and contact springs 12 are included in operation. When power is disconnected from coil 3, armature 5 returns to its original position under the action of return springs 14.

Information sources

1. Catalog Informelectro 07.14.27-02. "Starters electromagnetic PMA-3000".

2. Informelectro catalog 07.14.01-02. "PML electromagnetic starters."

Claims (4)

1. An electromagnetic switching apparatus comprising a housing in which a linear electromagnet with a Sh-shaped armature and a core is installed, on the middle core of which is a coil, a block with fixed contacts, a cross-arm with movable contacts, pivotally connected to the armature, return springs, shock absorbers connected with a core by means of axes passing through the core, a cover fixed to the block, characterized in that the housing is made thin-walled, and the upper part of the coil frame is made with longitudinal The protrusions at the edges installed in the recesses of the upper part of the side walls of the housing and the fixed protrusions of the side walls of the block, while the coil is mounted on shock absorbers that are located on the sides of the core base. 2. The electromagnetic switching apparatus according to claim 1, characterized in that the shock absorbers are made with protrusions on the upper and outer side faces, the base of the housing is made with sockets on the sides, and the lower part of the coil frame is made with recesses, while the shock absorbers are mounted with their side protrusions in the nests of the base of the housing, and the inclusion of the coil using the recesses on the bottom of the frame is rigidly fixed on the upper protrusions of the shock absorber. 3. The electromagnetic switching apparatus according to claim 2, characterized in that grooves are made in the upper part of the coil frame, in which flexible conductors of the coil leads are laid, while the device leads are made in the form of conductive metal staples and are installed in the nests of the device casing in its upper part regarding working position. 4. The electromagnetic switching apparatus according to claim 3, characterized in that the lid of the apparatus is rigidly fixed to the block by means of two elastic elements made on the cover from two opposite sides and fixed in grooves located on the edges of the block, insulating poles.

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