RU168790U1 - CONTACT SUPPORT POSITIONING DEVICE FOR CONTACTOR AND CONTACTOR - Google Patents

Abstract

A device for positioning a contact holder for a contactor is proposed, comprising a base defining an internal cavity, the contact holder being located in the internal cavity of the base and configured to deviate between the first position and the second position, in which each of the outer surfaces of the two sides of the contact holder adjacent to the wall of the internal cavity of the base, respectively equipped with a position limiter; when the contact holder is in the first position, a gap remains between the outer surface of the contact holder and the wall of the inner cavity of the base and the position limiter has a lateral height slightly less than the width of the gap; and when the contact holder deviates to the second position, one of the position limiters is in contact with the wall of the internal cavity. A contactor positioner for a contactor can increase the shutdown speed and synchronism of movement of the contacts of a multi-pole contactor.

Description

CONTACT SUPPORT POSITIONING DEVICE FOR CONTACTOR AND CONTACTOR

FIELD OF TECHNOLOGY

The present utility model relates to the field of electrical components and, more specifically, to a positioning device of a contact holder inside a contactor and to a contactor comprising such a positioning device.

BACKGROUND OF USEFUL MODEL

Synchronism when opening contacts in a multi-pole contactor is one of the important indicators that reflect the operational qualities of such a contactor. In a three-phase AC contactor, for example, if the three-phase contacts are not disconnected at the same time, the generated electric arcs will have a different size, which, in turn, causes a different degree of wear of the three-phase contacts and limits the contactor service life to the contact life. A contact that wears out most quickly and has the shortest service life will cause the contactor to fail. In the design of the contactor, a lot of space is left between the movable elements to allow free movement of the contact system at the base of the contactor in order to set the movable contact in motion. However, the size of the space between the contact holder and the base is inversely related to the synchronism of the contacts. The larger the space, the greater the magnitude of the swings of the contact holder at the base. When the movable contacts are pushed out, the movable contact that touches the contact holder will disconnect first, and the movable contact that touches the contact holder later will be disconnected later. Thus, the desired synchronization cannot be achieved.

BRIEF DESCRIPTION OF USEFUL MODEL

To overcome the aforementioned problem, the present utility model proposes a new contact carrier positioning device for a contactor, which can limit the swing range of the contact holder to increase the synchronism of the multi-pole contactor when opening the contacts.

According to one aspect of the present utility model, a contact holder positioning device for a contactor is provided. The contact holder positioning device comprises a base forming an internal cavity, the contact holder being located in the internal cavity of the base and deviating between the first position and the second position, each of the outer surfaces of the two sides of the contact holder adjacent to the wall of the internal cavity of the base having a position limiter; when the contact holder is in the first position between the outer surface of the contact holder and the wall of the inner cavity of the base there is a gap and the position limiter has a lateral height slightly less than the width of the gap; and when the contact holder deviates to the second position, one of the position limiters is in contact with the wall of the internal cavity.

Preferably, the gap may have a width of from about 0.3 mm to 1.5 mm.

Preferably, the position limiter may be a protrusion located on the contact holder.

More preferably, the position limiter and the contact holder can be integrated into one, wherein the position limiter can be made of plastic and / or bakelite. Alternatively, the position limiter may be a separate part secured to the contact carrier, and preferably with a pin or ball, which is adapted to be inserted into the corresponding hole in the contact carrier.

Preferably, the position limiter may be located on the upper part or on the lower part of the outer surfaces of the two sides of the contact holder adjacent to the wall of the inner cavity of the base.

Preferably, the contactor may be a multi-pole contactor.

According to another aspect of the present utility model, a contactor is provided that includes a contact holder positioning device described above.

Taking into account the above technical solutions, when the contact holder deviates, one of the position limiters can be in contact with the wall of the internal cavity of the base at the moment when it is necessary to prevent further deviation of the contact holder, so that the movement of the contact holder can be limited to the extent necessary to increase the synchronism of movement of the contacts multi-pole contactor. In addition, the contact between the position limiter and the wall of the inner cavity of the base is the contact of the line with the surface in order to reduce the braking of the clamp during sliding and its resulting effect on the shut-off speed.

The present utility model will now be described with reference to the drawings and embodiments.

BRIEF DESCRIPTION OF GRAPHIC MATERIALS

The accompanying graphic materials illustrate one or more embodiments of the utility model and, together with the written description, serve to explain the principles of the utility model. Wherever possible, the same reference numbers will be used on all graphic materials to refer to the same or similar elements of an embodiment.

In FIG. 1 is a schematic diagram illustrating a contact holder positioning device for a contactor in accordance with one embodiment of the present utility model in which the contact holder is in a first position.

In FIG. 2 is a schematic view illustrating a contact holder positioning device for the contactor of FIG. 1, in which the contact holder is in a second position.

In FIG. 3 shows an enlarged local view of part A of figure 2.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

In the following description of embodiments, reference is made to the accompanying drawings, which form part of this description and which show, by way of illustration, specific examples of the utility model that may be practiced. It should be understood that other embodiments may be used and structural changes may be made without departing from the spirit and scope of the described embodiments.

As shown in FIG. 1-3, the positioning device of the contact holder for the contactor comprises a base 1 and a contact holder 2. The base 1 may define an internal cavity. Contact holder 2 may be located in the internal cavity. Each of the outer surfaces 21 of the two sides of the contact carrier 2 adjacent to the wall 11 of the inner cavity of the base 1 is provided with a limiter 211, respectively.

In this embodiment, the position limiter may be a protrusion located on the contact carrier. Preferably, the position limiter may be a protrusion made of plastic and / or bakelite, integral with the contact holder 2, to perform the function of the position limiter. Alternatively, the position limiter may be a pin or ball inserted into the corresponding hole in the contact carrier 2. It should be borne in mind that examples of the position limiter are not limited to this, that is, the position limiter can be made of any suitable material or be formed by any suitable structure if the function for a real utility model can be achieved.

The contact carrier 2 may deviate between the first position and the second position. When the contact holder 2 is in the first position, a gap remains between the outer surface of the contact holder 2 and the wall 11 of the inner cavity of the base 1, as shown in FIG. 1. In this embodiment, the gap may be approximately 0.3-1.5 mm wide and the position limiter has a lateral height slightly less than the width of the gap. Thus, when the contact holder 2 is in the first position, both the contact holder 2 and the position limiter 211 are not in contact with the wall 11 of the internal cavity, and there are gaps between the contact holder and the wall 11 of the internal cavity, and between the position limiter 211 and the wall 11 of the internal cavities.

When the contact carrier 2 deviates to the second position, the position limiter 211, rotated relative to the direction of the deviation, is in contact with the wall 11 of the internal cavity to prevent further deviation of the contact holder 2 and to leave the contact holder 2 deflected to this limit position so that the synchronism of the multi-pole contactor can be within the acceptable range. On the other hand, the contact between the position limiter 211 and the wall 11 of the inner cavity of the base 1 is a line contact with the surface, the friction force of which is much less than the contact of the surface with the surface in order to reduce the braking of the clamp during sliding and its resulting effect on the shutdown speed .

In this embodiment, the position limiter 211 may be located on the lower part of the outer surfaces 21 on two sides of the contact carrier 2 adjacent to the wall 11 of the inner cavity of the base 1. In other embodiments, the position limiter 211 may also be located on the upper part of the outer surfaces 21.

The foregoing is a detailed description of preferred embodiments of the utility model and should not be construed as limiting the scope of the present utility model. It should be noted that options and improvements will be apparent to those skilled in the art to which the present utility model relates, within its essence and scope. Thus, the scope of the present utility model is determined by the attached utility model formula.

Claims (12)

1. The positioning device of the contact holder for the contactor, containing: the basis (1) defining the internal cavity; a contact carrier (2) located in the inner cavity of the base and configured to deviate between the non-deflected position and the deflected position; the contact holder is equipped with two position limiters (211) located on the outer surfaces (21) of both sides of the contact holder adjacent to the wall of the inner cavity of the base, respectively; each position limiter is a protrusion located on the contact holder and has a lateral height slightly smaller than the width of the gap between the external surface of the contact holder and the wall of the internal cavity when the contact holder is in an undeflected position, while one of the position limiters is configured to contact the wall of the internal cavity when the contact holder deviates to the deviated position for contact of the line with the surface. 2. The positioning device of the contact carrier according to claim 1, wherein the gap has a width of approximately 0.3-1.5 mm. 3. The positioning device of the contact holder according to claim 1, wherein the position limiter and the contact holder are integral. 4. The positioning device of the contact carrier according to claim 3, wherein the position limiter is made of plastic and / or bakelite. 5. The positioning device of the contact holder according to claim 1, wherein the position limiter is a separate part mounted on the contact holder. 6. The positioning device of the contact holder according to claim 5, in which the position limiter is a pin or ball made with the possibility of installation in the corresponding hole in the contact holder. 7. The positioning device of the contact carrier according to claim 1, wherein the position limiter is located on the upper portion or on the lower portion of the outer surfaces of the two sides of the contact carrier adjacent to the wall of the inner cavity of the base. 8. The positioning device of the contact holder according to claim 1, wherein the contactor is a multi-pole contactor.

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