CN102473554B - There is the catalyst of damping device - Google Patents

Abstract

The present invention relates to a kind of switching device (12), especially catalyst, have: switch region (14), this switch region has contact system；With drive area (15), this drive area includes armature (19), with the coil (17) of coil case (21) and yoke (16).It is a feature of the present invention that yoke (16) is flexibly placed in described coil case (21) by damper element (13a).

Description

Contactor with shock absorber

technical field

The invention relates to a switching device, in particular a contactor, having a switching region with a contact system and a drive region comprising an armature, a coil with a coil body, and a yoke.

Background technique

When the electromagnetic switching device is switched on, the impact of the magnetic armature with the magnetic core leads to undesired vibrations, which lead to so-called armature vibrations. In addition, the impact of the movable switching element with the stationary switching element produces contact oscillations, wherein the armature-core impact also counteracts the contact oscillations.

Both of these effects are to be avoided as much as possible, because on the one hand, they shorten the service life of the magnetic system (especially the pole faces) and on the other hand, they generate a vibrating arc on the contacts, which is harmful to the material. Losses are eliminated and the contacts are soldered in the worst case.

Multiple lifts of the contacts can lead to uncontrolled miscontrol of the device. In addition, vibrations have a detrimental effect on the stability of electrical connections, the fastening of switching devices and the service life of components.

Switching devices with AC-drive units have a very high switching speed when closing the magnetic system. In this case, the armature with the contact carrier strikes the yoke, and the movable contact bridge strikes from the off position onto the fixed contact in the on position. Due to the high striking speed, the armature can strike again with the contact carrier and its movable contact bridge back into the open position, which is referred to as so-called contact bounce.

As a result, arcs are produced between the movable contact and the fixed contact, which have a negative effect on the mechanical and electrical service life of the switching device.

A magnetic damper is known from EP 0 855 084 B1, wherein the yoke in the housing is placed on a strip-shaped rubber damper extending longitudinally along the yoke on the housing floor and between the coils A conical damping pressure spring is arranged between the body and the yoke, which presses the yoke in the direction of the housing floor and weakens the armature against the yoke by means of the spring force of the damping pressure spring when the magnetic system is closed. hit.

A magnetic damping device is known from EP 0 855 085 B1, wherein the housing floor is designed to be vibrated, the yoke is placed under a rubber-embedded intermediate layer and the magnetic chamber floor is designed with two Different elastic support areas, one area is less elastic and the other area is relatively strong. Depending on the design of the support bars in the magnetic chamber base, the spring action can be adapted to the required damping.

A disadvantage of the prior art is that the damping of the yoke is based on an embedded rubber arranged between the yoke and the magnetic chamber floor, which cannot The shock absorption provided is very poor, so this shock still results in a strong rebound when the magnetic system is closed.

Contents of the invention

It is therefore the object of the present invention to realize a switching device having a damping device which significantly reduces springback when the magnetic system is closed.

This object is achieved by the switching device of the invention.

A switching device according to the invention, in particular a contactor, has a switching area with a contact system and an actuating area comprising an armature, a coil with a coil body, and a yoke. The invention is characterized in that the yoke is elastically accommodated in the coil body via a damping element. It is provided that the coil body completely surrounds the damping element. The damping element is preferably made of rubber.

In a further advantageous embodiment it is provided that the coil body itself is also elastically accommodated in the magnetic chamber, thereby producing a two-part damping, in that on the one hand the yoke is elastically accommodated in the coil body and on the other hand On the one hand, the coil body itself is also elastically mounted. Preferably, the coil body is elastically seated in the magnetic chamber by means of a spring. According to the invention, it is provided in a particular embodiment that the coil body is elastically mounted by the plastic arms serving as spring elements.

The damping device according to the invention is characterized in that the yoke is elastically seated in the coil body via the damping element and that the coil body completely surrounds the damping element. In addition, the entire coil body can be further elastically mounted, so that the damping device is divided into two damping devices.

Description of drawings

Further advantages and embodiments of the invention are explained below with the aid of examples and with the aid of the drawings.

Among them, schematically shows:

Figure 1 shows a perspective view of an electromagnetic switchgear with a shock absorber in the prior art;

Figure 2 shows a front view of an electromagnetic switching device with a damping device according to the invention;

FIG. 3 shows a perspective sectional view according to FIG. 2;

FIG. 4 shows a perspective view of another embodiment of the invention with an additional damping device for the coil former.

detailed description

FIG. 1 shows a switching device 1 with a damping device 2 known from the prior art. The switching device 1 has a housing 3 which is composed of two parts, a housing lower part 4 and a housing upper part 5 . The housing lower part 4 is designed as a magnetic chamber 6 which has a magnetic chamber base 7 on its underside. The damping device 2 is arranged on the magnetic chamber floor 7 . Arranged in the magnetic chamber is a drive unit 8 comprising a yoke 9 placed on the magnetic chamber floor 7 , a coil 10 arranged above the yoke 9 and an armature 11 movably arranged above the coil 10 .

FIG. 2 shows an electromagnetic switching device 12 with a damping device 13 according to the invention. The switching device 12 has a switching area 14 which has a contact system and is arranged above an actuation area 15 . The drive region 15 includes a yoke 16 , a coil 17 arranged above the yoke 16 and an armature 19 arranged movably above the coil 17 . The coil 17 has a coil winding 20 and a coil body 21 which has a recess 22 below the coil winding 20 . In the groove 22 there is a damping device 13 according to the invention which is completely surrounded by the coil body 21 and is designed as a damping element 13 a, preferably made of rubber.

FIG. 3 shows a perspective sectional view according to FIG. 2 . Basically shown is a drive region 15 comprising a yoke 16 , a coil 17 arranged above the yoke 16 and an armature 19 arranged movably above the coil 17 . The coil 17 comprises a coil winding 20 and a coil body 21 which has a recess 22 below the coil winding 20 . In the groove 22 there is a damping device 13 according to the invention which is completely surrounded by the coil body 21 and is designed as a damping element, preferably made of rubber.

FIG. 4 shows a solenoid switching device 12 with a further damping device 23 according to the invention. The damping device 23 elastically mounts the entire coil body 21 on the housing base 24 of the electromagnetic switching device 12 . The damping device 23 preferably comprises two bearing blocks 25 , 26 arranged parallel to one another, which elastically mount the coil body 21 on the magnetic chamber floor.

The damping device according to the invention is characterized in that the yoke is elastically accommodated in the coil body via the damping element and that the coil body completely surrounds the damping element. In addition, the entire coil body can furthermore be mounted elastically, so that the damping device is divided into two damping devices.

Claims (5)

1. A switching device (12), having: a switching area (14), said switching area having a contact system; and an actuating area (15), said actuating area comprising an armature (19), with a coil body (21) The coil (17) and the yoke (16) are characterized in that the yoke (16) is elastically arranged in the coil body (21) through the shock absorbing element (13a), wherein the switch device (12) also includes a further damping device (23), by means of which the coil body (21) is elastically mounted in the magnetic chamber, the coil body completely enclosing the damping element. 2. Switching device (12) according to claim 1, characterized in that the damping element (13a) is made of rubber. 3. The switching device (12) according to claim 1 or 2, characterized in that the coil body (21) is elastically seated in the magnetic chamber by means of a spring. 4. Switching device (12) according to claim 1 or 2, characterized in that the coil body is elastically mounted by a plastic arm. 5. Switching device (12) according to claim 1, characterized in that the switching device is a contactor.