KR19990065905A - Shading coil fixing structure of magnetic contactor - Google Patents

Abstract

The shading coil fixing structure of the electromagnetic contactor according to the present invention can not only easily fix the shading coil through the linkage structure of the upper lower frame and the fixing core, but also prevent the breaking phenomenon of the shading coil, thereby operating stability and productivity of the magnetic contactor. In order to provide an advantage that it is helpful to improve, the fixed core 20 and the bobbin coil 30 which exerts a magnetic force to attract the movable core 22 by being magnetized by the bobbin coil 30 is applied to the power, And the lower frame 10 on which the fixed core 20 is seated, the upper frame 12 coupled to the lower frame 10 and mounted thereon, and on which the movable core 22 is mounted, of the fixed core 20. It comprises an annular shading coil 70 to reduce the chattering phenomenon generated during magnetization, the lower end of the lower frame 10 in close proximity to the upper end side of the fixed core 20 and the side end of the fixed core 20Line grooves 20b and 10a are respectively formed on the surface, and one side of the shading coil 70 is simply inserted into the line groove 20b of the fixed core 20, and the other side thereof is the line groove of the lower frame 10. It is characterized in that the upper frame 12 is fixed as combined with the lower frame 10 in a simple inserted state (10a).

Description

Shading coil fixing structure of magnetic contactor

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic contactor, and more particularly, to a shaping coil fixing structure for reducing a chattering phenomenon occurring when a fixed core and a movable core are connected.

The magnetic contactor that opens and closes the electric circuit forms a magnetic switch in combination with a thermal relay for overload protection, and a contact part for directly blocking or connecting the electric circuit. , An electromagnet portion for controlling the operation of the contact portion, and an frame made of an insulating material provided with the contact portion and the electromagnet portion.

As shown in FIG. 1, the electromagnet portion includes a fixed core 20 mounted on the lower frame 10, a bobbin coil 30 mounted thereon, and magnetized around the fixed core 20 to magnetize the fixed core 20. It comprises a movable core 22 drawn by the fixed core 20, the movable core 22 is mounted to the lower end of the crossbar 40, the fixed core 20 and the movable core 22 A return spring 50 for returning the pulled movable core 22 to its original position is mounted therebetween.

Here, the movable core 22 is mounted by fitting the pin 24 penetrating the upper end of the crossbar 40, the fixing core 20 is fitted with a support pin (not shown) at the lower end Both ends of the support pin are seated on the lower frame 10 in a state where the cushion cover 25 made of elastic material such as rubber is fitted, and between the fixing core 20 and the lower frame 10 is also made of rubber or the like. A buffer plate 26 is provided.

The contact part is installed at both ends of the upper frame 12, and the left and right fixed contactors 60 and crossbars 40 are connected to the power input side terminal and the load side terminal of the electric circuit, respectively, and are fixed to the left and right sides. It consists of a plurality of movable contacts 62 for electrically connecting or disconnecting the contacts 60.

Therefore, according to the electromagnetic contactor configured as described above, when a current is applied to the bobbin coil 30 to magnetize the fixed core 20, the movable core 22 is attracted by the magnetic force of the fixed core 20. Accordingly, while the crossbar 40 provided with the movable core 22 is moved, the movable contactor 62 installed on the crossbar 40 and the fixed contactor 60 fixed to the upper frame 12 are connected so that the electric circuit is energized. do. At this time, the shock absorbing cover 25 and the shock absorbing plate 26 absorb the shock generated when the fixed core 20 and the movable core 22 are connected.

On the other hand, the magnetic force applied to the movable core 22 by the fixed core 20 during the operation of the magnetic contactor is irregular by the frequency of the current supplied to the bobbin coil 30, and thus the irregular magnetic force and the fixed core 20 The chattering phenomenon that causes the connection state of the movable core 22 to become unstable and causes vibration, such a chattering phenomenon not only causes noise when the magnetic contactor is operated, but also connects the circuit. The state also destabilizes.

Therefore, the shaping coil 70 for reducing the chattering phenomenon is mounted on the electromagnetic contactor. As shown in FIG. 2, the shading coil 70 is an elliptical metal piece of the fixed core 20. One by one is inserted into each of the double line groove (20a) formed on each side contact surface is fixed by a caulking (caulking) method.

Therefore, according to the related art, the shading coil 70 generates magnetic force and generates a magnetic flux having a phase different from that of the main magnetic flux generated in the fixed core 20, thereby reducing the chattering phenomenon by the combination of the two magnetic fluxes.

However, in the prior art as described above, since the shading coil is fixed to the fixed core by applying a strong pressure to a portion of the shading coil 70 such as caulking to deform the portion, the shading coil is fixed core. If the impact is applied due to the collision of the movable core and the fixed core when the magnetic contactor is installed in the state that the magnetic contactor is mounted on the shaft, the probability of breakage due to stress concentration on a part of the shading coil is increased, resulting in inferior operational stability of the magnetic contactor. In addition to this, there is also a problem that the productivity of the magnetic contactor is reduced by requiring a complex process such as caulking.

The present invention has been made to solve the problems of the prior art as described above, by providing a shading coil fixing structure of the magnetic contactor to help improve the operation stability and productivity of the magnetic contactor by simply fixing the shading coil. The purpose.

In order to achieve the above object, the present invention provides a fixed core that exerts a magnetic force to attract a movable core by magnetizing by a bobbin coil to which power is applied, a lower frame on which the bobbin coil and a fixed core are seated, and the lower frame and its A magnetic contactor including an upper frame coupled upwardly and equipped with a movable core, and an annular shading coil for reducing chattering occurring during magnetization of the fixed core, wherein the upper end side and the fixed side of the fixed core are fixed. A line groove is formed on the upper surface of the lower frame adjacent to the side end of the core, and the upper frame is lowered with the shading coil being simply inserted into one line groove of the fixed core and the other side simply inserted into the line groove of the lower frame. It provides a magnetic contactor, characterized in that is fixed in combination with the frame.

1 is an exploded perspective view showing the components of a general magnetic contactor

Figure 2 is a perspective view showing the shading coil fixing structure of the magnetic contactor according to the prior art

Figure 3 is an exploded perspective view showing the shading coil fixing structure of the magnetic contactor according to the present invention

4 is a cross-sectional view showing a state in which the shading coil is mounted by the shading coil fixing structure of the magnetic contactor according to the present invention.

Explanation of symbols for the main parts of the drawings

10: lower frame 10a: line groove

12: upper frame 20: fixed core

20a: line groove 20b: line groove

22: movable core 24: fixed pin

25: buffer cover 26: buffer plate

30: bobbin coil 40: crossbar

50: return spring 60: fixed contact

62: movable contact 70: shading coil

DETAILED DESCRIPTION Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 3 and 4, and the same parts as in the prior art will be given the same reference numerals.

3 is an exploded perspective view showing the shading coil fixing structure of the electromagnetic contactor according to the present invention, Figure 4 is a cross-sectional view showing a state in which the shading coil is mounted by the shading coil fixing structure of the magnetic contactor according to the present invention.

The shading coil fixing structure of the magnetic contactor according to the embodiment of the present invention is magnetized by the bobbin coil 30 (see FIG. 1) to which the power is applied as shown in FIG. 3 to move the movable core 22 (see FIG. 1). A fixed core 20 exerting a magnetic force, a lower frame 10 on which the bobbin coil 30 and the fixed core 20 are seated, and a lower portion of the lower frame 10 and a movable core 22 is mounted to the upper frame 12, and the shading coil 70 of the annular for reducing the chattering phenomenon occurs when the magnetization of the fixed core 20, the lower frame 10 Line grooves 10a and 20b in which the shading coil 70 is simply inserted are respectively formed on the upper surface of the upper surface and the side end upper surface of the fixing core 20 adjacent thereto.

And, as shown in Figure 4, the shading coil 70 is the upper frame 12 in the state that is simply inserted into the upper groove of the lower frame 10 and the line grooves (10a, 20b) formed on the upper surface of the fixed core 20. As combined with the lower frame 20, one side is fixed.

Therefore, according to the present invention configured as described above, when the fixed core 20 is mounted on the lower frame 10 when the magnetic contactor is manufactured, the shading coil 70 is lined with the lower frame 10 and the fixed core 20. Insert the upper frame 12 into the lower frame 10 by inserting it into the grooves 10a and 20b to remove a portion of the shading coil 70 into which the upper frame 12 is inserted into the line groove 10a of the lower frame 10. By binding the upper side, the shading coil 70 can be firmly fixed.

That is, a cumbersome process such as a caulking operation required to fix the shading coil 70 to the fixed core 20 as in the related art is omitted, and the shading coil 70 is simply placed at a predetermined position and the upper lower frame 12, It is possible to fix the shading coil 70 only by combining the 10).

As described above, the shading coil fixing structure of the electromagnetic contactor according to the present invention can not only easily fix the shading coil through the linkage structure of the upper lower frame and the fixing core, but also prevent the breaking phenomenon of the shading coil. The advantage arises that it helps to improve the operational stability and productivity of the system.

Claims (1)

A fixed core which magnetizes by a bobbin coil to which power is applied, thereby exerting a magnetic force to attract the movable core; A lower frame on which the bobbin coil and the fixing core are seated; An upper frame coupled to the lower frame and the upper frame and equipped with a movable core; In the magnetic contactor comprising an annular shading coil for reducing the chattering phenomenon generated during magnetization of the fixed core, A line groove is formed on an upper surface of the side end of the fixed core and an upper surface of the lower frame proximate to the side end of the fixed core. Magnetic contactor, characterized in that is fixed as the upper frame is coupled to the lower frame in a simple inserted state.