Ceramic cover for direct current contactor

Abstract

The utility model relates to a ceramic cover for a direct current contactor, which comprises a cover body, the cover body comprises a bottom wall and a side wall enclosed on the bottom wall, and a mounting cavity is formed in the side wall; the side wall is recessed inwards to form at least two leading-out grooves, openings are formed in the upper portions of the leading-out grooves in the bottom wall, assembling faces are formed in the lower portions of the leading-out grooves relative to the openings, the assembling faces are inclined faces from high to low from inside to outside, installation grooves are formed in the inner sides of the leading-out grooves, auxiliary contacts are arranged on the installation grooves in a penetrating mode, one ends of the auxiliary contacts extend into the leading-out grooves, and the other ends of the auxiliary contacts extend into the leading-out grooves. And the other end extends into the mounting cavity. According to the scheme, the side wall of the ceramic cover is recessed inwards to form the lead-out groove, so that mounting parts on the bottom wall are reduced, and the structural strength of the bottom wall is improved; in addition, due to the arrangement of the lead-out grooves, some special shapes of the ceramic cover are different from those of a conventional cover body, and the overall structural strength is enhanced; in addition, the inclined arrangement of the assembly surface is matched with the lead-out groove, so that the auxiliary contact is very convenient to assemble from the side surface and connect the circuit, and the assembly convenience is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of contactors, in particular to a ceramic cover for a DC contactor. Background Art

[0002] High-voltage DC contactors are widely used in new energy vehicles, charging piles, photovoltaic power generation, energy storage systems, etc. In addition to the main contacts, existing high-voltage DC contactors usually have auxiliary contacts as auxiliary logic switches for the circuit control system to determine the working state of the contactor and monitor the adhesion failure of the main circuit contacts.

[0003] The ceramic cover of the existing high-voltage DC contactor is basically square or round, the service life of the cover is relatively general, and the main contacts and auxiliary contacts are usually arranged on one side of the cover, which reduces the structural strength of the cover surface and makes the auxiliary contacts quite troublesome when wiring. Summary of the invention

[0004] In order to solve the above problems, the purpose of the utility model is to provide a ceramic cover for a DC contactor, which can set the main contacts and the auxiliary contacts relatively far apart, and improve the structural strength of the ceramic cover and the service life of the cover.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0006] A ceramic cover for a DC contactor includes a cover body, characterized in that: the cover body includes a bottom wall and a side wall formed on the bottom wall, and a mounting cavity is formed in the side wall; the side wall is recessed inward to form at least two lead-out grooves, the upper part of the lead-out groove forms an opening on the bottom wall, and the lower part of the lead-out groove forms an assembly surface relative to the opening, and the assembly surface is an inclined surface from high to low from the inside to the outside, and a mounting groove is constructed on the inner side of the lead-out groove, and an auxiliary contact is penetrated on the mounting groove, one end of the auxiliary contact extends into the lead-out groove, and the other end extends into the mounting cavity.

[0007] In the above technical solution, the side wall of the ceramic cover is recessed inward to form a lead-out groove, and the auxiliary contact is installed in the lead-out groove, which is equivalent to the auxiliary contact sinking and vertically installed on the side wall, thereby reducing the number of installation components on the bottom wall and improving the structural strength of the bottom wall; and, the setting of the lead-out groove makes the ceramic cover somewhat different from the conventional cover body, and the overall structural strength is enhanced; in addition, the inclined setting of the assembly surface cooperates with the lead-out groove, which not only ensures the structural strength, but also makes it very convenient to assemble the auxiliary contacts and connect the lines from the side, thereby improving the convenience of assembly.

[0008] Preferably, two lead-out grooves are symmetrically arranged, and two through holes for installing the main contacts are symmetrically opened on the bottom wall, and the two lead-out grooves and the two through holes are arranged in a cross shape. In this technical solution, the two lead-out grooves and the two through holes are arranged in a cross shape, so that the setting of the lead-out grooves and the through holes where the main contacts are located are regularly staggered, and the arrangement is more reasonable.

[0009] Preferably, the lead-out groove forms a boss in the installation cavity, and reinforcing ribs are constructed on both side ends of the boss, the bottom of the reinforcing rib is connected to the bottom wall, and the inner end is connected to the side wall. In this technical solution, the provision of the reinforcing ribs not only further improves the structural strength of the cover as a whole, but also can maintain the structural stability of the boss formed relative to the lead-out groove, thereby making the arrangement of the auxiliary contacts in the lead-out groove more stable.

[0010] Preferably, the upper end of the reinforcing rib extends out of the upper end of the boss. In this technical solution, the upper end of the reinforcing rib extends out of the upper end of the boss, which means that the reinforcing rib is vertically extended longer, increasing the connection area between the reinforcing rib and the side wall, and having better stability.

[0011] Preferably, the inner ends of both sides of the reinforcing ribs have an arc transition with the inner end surface of the side wall and the boss. In this technical solution, the inner ends of both sides of the reinforcing ribs have an arc transition with the inner end surface of the side wall and the boss, which further increases the lateral connection area between the reinforcing ribs and the side wall, and also increases the connection length between the reinforcing ribs and the boss, thereby increasing the structural strength of the side wall and the boss of the cover body.

[0012] Preferably, the outer end surface of the reinforcing rib extends out of the outer end surface of the boss and is in an arc shape. In this technical solution, the outer end surface of the reinforcing rib extending out of the outer end surface of the boss can protect the boss, making the setting of the lead-out groove more stable, and the arc shape can avoid wear when touching the internal components during installation or maintenance.

[0013] Preferably, the reinforcing ribs are made of ceramic material, and the bottom wall, side wall and reinforcing ribs are integrally formed. In this technical solution, the reinforcing ribs are made of ceramic material, and the bottom wall, side wall and reinforcing ribs are integrally formed, so the integrity is good and the structural strength is further improved.

[0014] Preferably, the auxiliary contact is brazed on the ceramic cover. In this technical solution, the advantages of brazing are that the joint surface is smooth and airtight, and the shape and size of the auxiliary contact are more stable.

[0015] Preferably, a reinforcement groove is constructed between the two lead-out grooves and the two through holes on the bottom wall. In this technical solution, the through holes are relatively large, and in order to improve the structural strength of the bottom wall, a reinforcement groove is arranged between the two, which relatively improves the strength of the bottom wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1The figure is a schematic diagram of the assembly structure of a ceramic cover and auxiliary contacts for a DC contactor.

[0017] Figure 2 The figure is a schematic diagram of the three-dimensional structure of a ceramic cover for a DC contactor.

[0018] Figure 3 A schematic structural diagram of a ceramic cover and auxiliary contacts for a DC contactor from another perspective. Implementation

[0019] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0020] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0021] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "plurality" means two or more, unless otherwise clearly defined.

[0022] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0024] like Figures 1 to 3 A ceramic cover for a DC contactor is shown, comprising a cover body 1, wherein the cover body 1 comprises a bottom wall 2 and a side wall 3 enclosed and formed on the bottom wall 2, wherein a mounting cavity 4 is formed in the side wall 3; the side wall 3 is recessed inwardly to form at least two lead-out grooves 5, wherein the upper portion of the lead-out groove 5 forms an opening 6 on the bottom wall 2, and the lower portion of the lead-out groove 5 forms an assembly surface 7 relative to the opening 6, wherein the assembly surface 7 is an inclined surface from high to low from the inside to the outside, and an installation groove 8 is constructed on the inner side of the lead-out groove 5, wherein an auxiliary contact 9 is penetrated on the installation groove 8, wherein one end of the auxiliary contact 9 extends into the lead-out groove 5, and the other end extends into the mounting cavity 4.

[0025] In the above technical solution, the side wall of the ceramic cover is recessed inward to form a lead-out groove, and the auxiliary contact is installed in the lead-out groove, which is equivalent to the auxiliary contact sinking and vertically installed on the side wall, thereby reducing the number of installation components on the bottom wall and improving the structural strength of the bottom wall; and, the setting of the lead-out groove makes the ceramic cover somewhat different from the conventional cover body, and the overall structural strength is enhanced; in addition, the inclined setting of the assembly surface cooperates with the lead-out groove, which not only ensures the structural strength, but also makes it very convenient to assemble the auxiliary contacts and connect the lines from the side, thereby improving the convenience of assembly.

[0026] Furthermore, two lead-out grooves 5 are symmetrically arranged, and two through holes 10 for installing the main contacts are symmetrically opened on the bottom wall 2, and the two lead-out grooves 5 and the two through holes 10 are arranged in a cross shape. In this technical solution, the two lead-out grooves and the two through holes are arranged in a cross shape, so that the setting of the lead-out grooves and the through holes where the main contacts are located are regularly staggered, and the arrangement is more reasonable.

[0027] Furthermore, the lead-out groove 5 forms a boss 11 in the mounting cavity 4, and reinforcing ribs 12 are constructed at both side ends of the boss 11, the bottom of the reinforcing rib 12 is connected to the bottom wall 2, and the inner end is connected to the side wall 3. In this technical solution, the provision of the reinforcing ribs not only further improves the structural strength of the cover as a whole, but also can maintain the structural stability of the boss formed relative to the lead-out groove, thereby making the arrangement of the auxiliary contacts in the lead-out groove more stable.

[0028] Furthermore, the upper end of the reinforcing rib 12 extends out of the upper end of the boss 11. In this technical solution, the upper end of the reinforcing rib extends out of the upper end of the boss, which means that the reinforcing rib is vertically extended longer, increasing the connection area between the reinforcing rib and the side wall, and having better stability.

[0029] Furthermore, the inner ends of both sides of the reinforcing rib 12 have an arc transition with the inner end surface of the side wall 3 and the boss 11. In this technical solution, the inner ends of both sides of the reinforcing rib have an arc transition with the inner end surface of the side wall and the boss, which further increases the lateral connection area between the reinforcing rib and the side wall, and also increases the connection length between the reinforcing rib and the boss, thereby increasing the structural strength of the side wall and the boss of the cover body.

[0030] Furthermore, the outer end surface of the reinforcing rib 12 extends out of the outer end surface of the boss 11 and is in an arc shape. In this technical solution, the outer end surface of the reinforcing rib extending out of the outer end surface of the boss can protect the boss, making the setting of the lead-out groove more stable, and the arc shape can avoid wear when touching the internal components during installation or maintenance.

[0031] Furthermore, the reinforcing ribs 12 are made of ceramic material, and the bottom wall 2, the side wall 3 and the reinforcing ribs 12 are integrally formed. In this technical solution, the reinforcing ribs are made of ceramic material, and the bottom wall, the side wall and the reinforcing ribs are integrally formed, so the integrity is good and the structural strength is further improved.

[0032] Furthermore, the auxiliary contact 9 is brazed and arranged on the ceramic cover 1. In this technical solution, the advantage of brazing is that the joint surface is smooth and the air tightness is good, so that the shape and size of the auxiliary contact are more stable.

[0033] Furthermore, a reinforcement groove 13 is constructed on the bottom wall 2 between the two lead-out grooves 5 and the two through holes 10. In this technical solution, the through holes are relatively large, and a reinforcement groove is arranged between the two to improve the structural strength of the bottom wall, thereby relatively improving the bottom wall strength.

[0034] In this specific embodiment, in order to address the problems that the service life of the existing more regular contactor cover is relatively short, and the auxiliary contacts are installed close to the main contacts for ease of assembly and wiring, the above-mentioned scheme provides lead-out grooves on the cover for installing auxiliary contacts. The setting of the lead-out grooves makes the cover have an irregular shape, and the structural strength is greatly improved. The inner assembly surface is inclined to further facilitate the exposure of the auxiliary contacts, thereby improving the convenience of assembly. In addition, reinforcing ribs are provided on the inner side of the cover to further improve the structural strength of the cover, thereby improving the service life of the ceramic cover.

[0035] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0036] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention.

Claims

1. A ceramic cover for a DC contactor, comprising a cover body (1), characterized in that: The housing (1) comprises a bottom wall (2) and a side wall (3) enclosed and formed on the bottom wall (2), wherein a mounting cavity (4) is formed in the side wall (3); the side wall (3) is recessed inwardly to form at least two lead-out grooves (5), the upper portion of the lead-out groove (5) forms an opening (6) on the bottom wall (2), the lower portion of the lead-out groove (5) forms an assembly surface (7) relative to the opening (6), the assembly surface (7) is an inclined surface from high to low from inside to outside, a mounting groove (8) is constructed on the inner side of the lead-out groove (5), an auxiliary contact (9) is penetrated on the mounting groove (8), one end of the auxiliary contact (9) extends into the lead-out groove (5), and the other end extends into the mounting cavity (4).

2. The ceramic cover for a DC contactor according to claim 1, characterized in that: Two lead-out grooves (5) are symmetrically arranged, and two through holes (10) for mounting main contacts are symmetrically opened on the bottom wall (2), and the two lead-out grooves (5) and the two through holes (10) are arranged in a cross shape.

3. The ceramic cover for a DC contactor according to claim 1, characterized in that: The lead-out groove (5) forms a boss (11) in the installation cavity (4), and reinforcing ribs (12) are constructed on both side ends of the boss (11). The bottom of the reinforcing rib (12) is connected to the bottom wall (2), and the inner end is connected to the side wall (3).

4. The ceramic cover for a DC contactor according to claim 3, characterized in that: The upper end of the reinforcing rib (12) extends out of the upper end of the boss (11).

5. The ceramic cover for a DC contactor according to claim 4, characterized in that: The inner ends of both sides of the reinforcing rib (12) form a transition arc between the inner end surface of the side wall (3) and the boss (11).

6. The ceramic cover for a DC contactor according to claim 5, characterized in that: The outer end surface of the reinforcing rib (12) extends out of the outer end surface of the boss (11) and is in an arc shape.

7. The ceramic cover for a DC contactor according to claim 3, characterized in that: The reinforcing rib (12) is made of ceramic material, and the bottom wall (2), the side wall (3) and the reinforcing rib (12) are integrally formed.

8. The ceramic cover for a DC contactor according to claim 1, characterized in that: The auxiliary contact (9) is brazed and arranged on the ceramic cover.

9. The ceramic cover for a DC contactor according to claim 2, characterized in that: A reinforcement groove (13) is constructed on the bottom wall (2) between the two lead-out grooves (5) and the two through holes (10).

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