CN1652278A - Electromagnetic relay with spring push mechanism - Google Patents

Abstract

The disclosed electromagnetic relay is composed of magnetic circuit part static and moving springs and base, and middle mechanism. In magnetic circuit, winding and yoke are positioned on the base. Armature, static and moving springs are setup at the base. The static spring consists of static contact and riveted spring leaves. Moving contact for forming circuital channel is riveted on head part of the moving spring leaves including two pieces of spring leaves riveted. Rivets form bulge structure of positioning springs. The said middle mechanism is composed of promoting block and spring. One end of the spring is installed on bulge structure in window of upper part of the promoting block, and the other end of the spring is installed on bulge structure on combined head of the moving spring. Overtravel of contact is generated by compression deformation of spring, and not generated from deformation of moving spring directly so as to solve problem of high cyclic fatigue of moving spring.

Description

Electromagnetic relay with spring push mechanism

technical field

The invention relates to a magnetic latching relay, in particular to an electromagnetic relay with a spring pushing structure.

Background technique

At present, one of the development directions of electronic technology is high reliability, high power, low power consumption, small size, and low cost. As an electromechanical component, magnetic latching relays are widely used in various industrial controls, power systems, office equipment, household appliances, communication equipment, aerospace and other fields. Especially when the magnetic latching relay is working, the permanent magnet in the magnetic circuit part replaces the electromagnetic generated by the coil of the ordinary electromagnetic relay, and the coil does not need to be energized for a long time, so that it has the characteristics of close to "0" power consumption. It is getting higher and higher today, and its application is becoming more and more extensive.

Fig. 1 is a structural schematic diagram of an existing small high-power magnetic latching relay (patent number: 99202168.5). It consists of a magnetic circuit part, a base part and an intermediate mechanism. The base part includes a base 16, a static spring combination 17 and a moving spring combination 18. The magnetic circuit part is composed of a coil 12, a yoke 13 and an armature combination 14. The armature combination can be moved along its The metal rotating shaft 19 inserted in the center rotates. The intermediate mechanism is only played by a pushing block 15 with draw-in slots on both sides. When the coil is energized to drive the armature to rotate, the armature drives the push block to directly push the small moving spring at the end of the moving spring assembly to deform, thereby realizing switching of the contacts and generating overtravel of the contacts. Therefore, the relay with this structure requires the moving spring to have sufficient flexibility, which greatly limits the current carrying capacity of the moving spring. At the same time, it is easy to cause high cycle fatigue of the small moving spring at the end of the moving spring assembly due to deformation, resulting in mechanical parameters. Failure problems such as changes or even fractures.

How to solve the high-cycle fatigue of the moving spring and ensure the necessary overtravel of the contacts has become a difficult point in the design of this type of magnetic latching relay.

Contents of the invention

The object of the present invention is to provide an electromagnetic relay with a spring pushing structure. The intermediate mechanism of this type of relay is composed of a push block and a spring. The contact overtravel is not directly generated by the deformation of the moving spring, but by the compression deformation of the spring. Therefore, it can not only meet the design requirements of the specific contact overtravel of the relay, but also solve the problems of high cycle fatigue caused by the deformation of the moving spring.

The invention is provided with a magnetic circuit part, a static spring combination, a moving spring combination, a base, an intermediate mechanism and a shell. The structure of the magnetic circuit part is similar to the structure shown in Figure 1. It is composed of a coil, a yoke and an armature. After the coil and the yoke are inserted into each other, they are positioned on the positioning groove of the base by the yoke, and the armature is positioned on the base by its central rotating shaft. On the shaft hole; the static spring combination and the moving spring combination are set on the base, the static spring combination is composed of a static contact and the static reed riveting, and the moving spring combination is formed by two moving reeds stacked and riveted with the lead-out piece. The head is riveted with the movable contact to form the channel of the circuit, and the riveted rivets form the raised structure of the positioning spring; the intermediate mechanism is composed of a push block and a spring, one end of the spring is installed on the raised structure in the window on the upper part of the push block, and the other end It is installed on the protruding structure of the head of the moving spring combination, thereby establishing the connection between the moving spring combination and the push block, and the pull rod structure of the lower part of the push block is provided with a card slot to cooperate with the head of the armature combination. Therefore, the intermediate mechanism becomes an intermediate transmission mechanism connecting the armature assembly and the base part.

The spring of the said intermediate mechanism is installed under the window of the push block to form a single pole single throw (SPST) type product, and the static spring combination is provided with a static spring combination; or the spring of the said intermediate mechanism is installed above and below the window, A single-pole double-throw (SPDT) product is formed, and the static spring combination is provided with an upper static spring combination and a lower static spring combination.

In the present invention, a spring is installed in the window of the upper part of the pushing block. When the coil drives the armature assembly to rotate around the rotating shaft, it drives the action of the intermediate mechanism at the same time. The intermediate mechanism drives the combined action of the moving spring through the compression of the spring to realize the connection of the contacts and the overtravel of the contact, which solves the problem of fatigue of the moving spring caused by the overtravel of the contact caused by the deformation of the moving spring in the traditional structure.

In the present invention, in order to prevent the spring from departing from the predetermined working position during the action and ensure the reliability of the spring operation, a protruding structure is provided in the window of the upper part of the push block and on the moving spring combination to position the spring.

In the present invention, for SPST and SPDT two types of products, the form and working principle of the intermediate mechanism are slightly different: for the intermediate mechanism of SPST type products, the spring is only installed under the window of the push block The breaking of the contact is realized by the combination of pulling the spring on the upper window edge of the push block window, and the connection of the contact and the overtravel of the contact are realized by the compression force of the spring; the middle of the single-pole double-throw (SPDT) type product The spring of the mechanism is installed above and below the window at the same time, and the opening and closing of the contacts are all realized by the pressure difference after the compression of the upper and lower springs to pull the moving spring combination.

Description of drawings

Fig. 1 is a structural schematic diagram of an existing small high-power magnetic latching relay.

Fig. 2 is a schematic structural diagram of an embodiment of the present invention (single pole double throw type).

Fig. 3 is a schematic structural diagram of an embodiment of the present invention (single pole single throw type).

Fig. 4 is a structure diagram of an intermediate mechanism of an embodiment of the present invention (single pole double throw type).

Fig. 5 is a structure diagram of an intermediate mechanism of an embodiment of the present invention (single pole single throw type).

Fig. 6 is a structural diagram of the push block of the embodiment of the present invention (single pole double throw type).

Fig. 7 is a structural diagram of the push block of the embodiment of the present invention (single pole single throw type).

Fig. 8 is a structural diagram of the moving spring combination of the present invention.

Detailed ways

As shown in Figure 2, the present invention (single pole double throw type) consists of a base part, an intermediate mechanism, a magnetic circuit part and a casing. Among them: the base part is assembled by the upper static spring combination 2, the lower static spring combination 4 and the moving spring combination 3 directly inserted into the base 1; the intermediate mechanism is composed of a push block 6 and a spring 5; the magnetic circuit part is composed of a coil 9 , the yoke 8 and the armature combination 7, the coil and the yoke are positioned on the positioning groove of the base by the yoke after being inserted into each other, and the armature combination is positioned on the axis hole of the base by the rotating shaft in the center; the intermediate mechanism is connected by a spring and The combined connection of the movable spring is combined with the armature through the card slot of the part of the pull rod structure under the push block. When the coil drives the armature combination to rotate around the rotating shaft 10, it simultaneously drives the push block to move, and then drives the moving spring combination to move through the compressed spring, so as to realize the connection of the contacts and generate the overtravel of the contacts.

Similar to the SPDT product shown in Figure 2, Figure 3 shows the product structure of the SPST type, the difference is that the static spring combination of the base part only uses the upper static spring combination 11 (Note: SPST type does not have this part) , The intermediate mechanism is loaded with springs by pushing block 11.

As shown in Figures 4 and 5, for the SPDT and SPDT products, the form and working principle of the intermediate mechanism are slightly different: the intermediate mechanism of the SPDT (see Figure 4) The spring is installed above and below the window at the same time, and the breaking and connecting of the contacts are all realized by pulling the moving spring combination through the pressure difference after the compression of the upper and lower springs.

In the intermediate mechanism (see Figure 5) of single-pole single-throw (SPST) products, the spring is only installed under the window of the push block, and the breaking of the contact is realized by pulling the moving spring combination on the upper window edge of the push block window. The connection and overtravel of the contact are realized by the compression force of the spring;

As shown in Figure 6, the upper part of the single pole double throw (SPDT) push block is a window-shaped structure 6.1, and the upper and lower window edges of the window are provided with protrusions 6.2 as a positioning structure for the spring. The lower part of the push block is a pull rod structure and is provided with a card slot 6.3 to be combined with the armature.

As shown in Figure 7, the upper part of the single pole single throw (SPST) type push block is divided into a window-shaped structure 11.1, and the lower edge of the window is provided with a protrusion 11.2 as a positioning structure for the spring. The lower part of the push block is a pull rod structure and is provided with a card slot 11.3 to be combined with the armature.

The moving spring combination shown in Figure 8 is composed of two moving reeds stacked and riveted with the lead-out piece, and the head is riveted with rivets or other methods to form the convex structure 3.1 of the positioning spring.

Claims (3)

1, the electromagnetic relay of band spring pushing structure, be provided with the magnetic circuit part, quiet spring combination, moving spring combination, base, intermediary agency and shell, the magnetic circuit part is by coil, yoke and armature are formed, rely on yoke to be positioned on the location notch of base behind the mutual plug-in mounting of coil and yoke, armature relies on the rotating shaft at its center to be positioned on the axis hole of base, it is characterized in that quiet spring combination and move the spring combination being located on the base, quiet spring combination is made up of fixed contact and static contact spring piece riveted joint, moving spring combination is formed poststack and lead-out tablet riveted joint by two movable contact springs, the passage of head riveted joint movable contact dot circuit, the riveted joint rivet forms the bulge-structure of retainer spring; Intermediary agency is made up of pushing block and spring, and an end of spring is contained on the bulge-structure in the window on pushing block top, and the other end is contained on the bulge-structure of moving spring headgear combination.

2, the electromagnetic relay of band spring pushing structure as claimed in claim 1 is characterized in that the spring of said intermediary agency is contained in the below of pushing block window, and the upper electrostatic spring combination is established in quiet spring combination.

3, the electromagnetic relay of band spring pushing structure as claimed in claim 1 is characterized in that the spring of said intermediary agency is contained in the above and below of window, and upper electrostatic spring combination and down quiet spring combination are established in quiet spring combination.

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