Patent Application
20230215674
The present disclosure relates to a movable contact bracket assembly, which includes a movable contact and a movable contact bracket. The present disclosure also provides a contactor, which includes the movable contact bracket assembly as described above.
In an existing movable contact bracket assembly, the movable contact is vulnerable to arc erosion, and the arc generated upon the movable contact and the stationary contact being separated is sometimes difficult to be guided to an arc extinguishing device, which has the problem of arc stagnation. In addition, during the movement of the movable contact, due to the lack of guidance, the movable contact may not be aligned with the stationary contact, resulting in safety problems.
Therefore, an purpose of the present disclosure provides a movable contact bracket assembly, which includes a movable contact and a movable contact bracket; the movable contact bracket assembly further includes a magnetic conductive frame, the magnetic conductive frame is configured to at least partially surround the movable contact to protect the movable contact from arc erosion.
Favorably, a contour of the magnetic conductive frame is configured to match a contour of the movable contact to at least partially surround the movable contact.
Favorably, the magnetic conductive frame includes an opening, and a contact of the movable contact extends through the opening by a predetermined distance, and the predetermined distance is selected to facilitate guiding an arc generated upon the movable contact and the stationary contact being separated from each other from the movable contact to the magnetic conductive frame.
Favorably, the magnetic conductive frame completely surrounds all portions except the contact of the movable contact.
Favorably, the magnetic conductive frame includes a notch to reduce a weight of the magnetic conductive frame.
Favorably, the magnetic conductive frame includes a first through hole, the movable contact includes a second through hole, and a guide shaft passes through the first through hole and the second through hole to connect the magnetic conductive frame and the movable contact.
Favorably, the movable contact bracket includes a guide groove along which the guide shaft can move.
Favorably, the movable contact bracket assembly further includes a heat insulation element, the heat insulation element is arranged between the movable contact and the movable contact bracket.
The present disclosure further provides a contactor, which includes the movable contact bracket assembly as described above.
The advantages and objectives of the present disclosure can be better understood from the following preferred embodiments of the present disclosure described in detail with the attached drawings. In order to better show the relationship of the components in the drawings, the drawings are not drawn to scale. In the attached drawings:
Various embodiments according to the present disclosure will be described in detail with reference to the drawings. Herein, it should be noted that, in the drawings, the same reference numerals are given to components that basically have the same or similar structures and functions, and repeated descriptions about them will be omitted. The term “including A, B, C, etc. in turn” only indicates the arrangement order of included components A, B, C, etc., and does not exclude the possibility of including other components between A and B and/or between B and C. The description of “first” and its variants is only to distinguish the components, and does not limit the scope of the present disclosure. Without departing from the scope of the present disclosure, the “first component” can be written as “second component” and so on. In this specification, the descriptions of “bottom” and “top” are involved, where the “top” of the movable contact refers to a side of the movable contact facing the stationary contact, and the “bottom” of the movable contact refers to a side of the movable contact away from the stationary contact.
The drawings in this specification are schematic diagrams, which assist in explaining the conception of the present disclosure and schematically show the shapes of various parts and their relationships.
Hereinafter, referring to
The movable contact bracket assembly 1 further includes a heat insulation element 13 disposed between the movable contact bracket 12 and the movable contact 11. The heat insulation element 13, such as but not limited to Normax paper, is flat in the drawings, but may have other shapes. The heat insulation element may be provided with protrusions 131 protruding from both sides, for example, for installing to the movable contact bracket. Of course, the heat insulation element may be installed to the movable contact bracket 12 by other suitable means. The heat insulation element avoids the direct contact between the movable contact bracket and the movable contact at high temperature, thus reducing the heat transfer from the movable contact to the movable contact bracket and the risk of the movable contact bracket breaking due to high temperature.
The movable contact bracket assembly also includes a magnetic conductive frame 14. In the examples of
The magnetic conductive frame 14 also includes an opening 142, preferably two openings 142 located at both ends of the magnetic conductive frame. In the case where the magnetic conductive frame surrounds the movable contact, two contacts 112 of the movable contact respectively extends through the two openings 142 by a predetermined distance, the predetermined distance is a distance from a top surface of the contact to the opening and is selected to facilitate guiding the arc generated upon the movable contact and the stationary contact being separated from each other from the movable contact to the magnetic conductive frame. Preferably, the predetermined distance is about 3 mm, for example. In this way, through the predetermined distance, it is convenient for the arc generated upon the movable contact and the stationary contact being separated to be guided from the contact of the movable contact to the magnetic conductive frame, thus avoiding the stagnation of the arc.
The movable contact bracket is provided with a convex column 123, which is used to install a pressure spring (not shown) between the movable contact bracket and the movable contact, so that one end of the pressure spring abuts against the convex column and the other end of the pressure spring abuts against the movable contact, thereby being able to press the movable contact and the magnetic conductive frame against the movable contact bracket.
The movable contact bracket 12 is provided with an opening 121 for receiving the movable contact, the magnetic conductive frame and the pressure spring. In addition, the movable contact bracket also includes a first guide slot 122 and a second guide slot 124. In the case where the movable contact and the magnetic conductive frame are connected by the guide shaft and accommodated in the opening 121, the guide shaft passes through the first guide slot and the second guide slot, so that the guide shaft can move in the first guide slot and the second guide slot. Through the cooperation of the guide shaft with the first guide groove and the second guide groove, the movable contact can be guided to move towards the stationary contact, and the alignment between the movable contact and the stationary contact can be ensured.
The movable contact bracket assembly according to the present disclosure is described above. The movable contact is at least partially surrounded by the magnetic conductive frame to protect the movable contact from arc. The contact of the movable contact extends a small distance from the opening of the magnetic conductive frame, which is convenient for the arc to be guided from the contact of the movable contact to the magnetic conductive frame, and then to the arc extinguishing device for arc extinguishing. Through the guide shaft and the guide groove on the movable contact bracket, the movable contact can be guided to move, thus reducing the heat generation.
Moreover, the technical features disclosed above are not limited to the disclosed combination with other features, and the skilled in art can also make other combinations among the technical features according to the purpose of the present disclosure, so as to realize the purpose of the present disclosure.
| Number | Date | Country | Kind |
|---|---|---|---|
| 202123409585.7 | Dec 2021 | CN | national |
