Auxiliary contact leading-out structure of direct current contactor

Abstract

The utility model relates to the technical field of contactors, in particular to an auxiliary contact leading-out structure of a direct current contactor, which comprises a shell and two auxiliary contacts mounted on the shell, the shell comprises a bottom wall and a side wall enclosed on the bottom wall, and a mounting cavity is formed in the side wall; the two auxiliary contacts are symmetrically installed on the side wall in a penetrating mode, a creepage distance is formed between the two auxiliary contacts, and the creepage distance is larger than the width of the bottom wall. According to the technical scheme, the two auxiliary contacts are transversely arranged on the side wall of the shell, and the creepage distance between the two auxiliary contacts is larger than the width of the bottom wall; conventional auxiliary contacts are installed on the bottom wall like the main contacts, the creepage distance between the two auxiliary contacts is smaller than the width of the bottom wall, the creepage phenomenon is prone to occurring, in addition, the number of parts arranged on the bottom wall is reduced, the structure of the bottom wall is more stable, and the service life of the shell is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of contactors, in particular to an auxiliary contact lead-out structure of 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 main contacts and auxiliary contacts are usually arranged on the bottom wall of the cover body, which reduces the structural strength of the bottom wall of the cover body. The main contacts are usually arranged on both sides of the length of the cover body, and the auxiliary contacts are generally arranged on both sides of the width of the cover body. Therefore, the distance between the two is relatively close, which is prone to creepage and poses certain safety hazards. Summary of the invention

[0004] In order to solve the above problems, the purpose of the utility model is to provide an auxiliary contact lead-out structure of a DC contactor, adjust the lead-out structure of the auxiliary contacts, increase the creepage distance between the auxiliary contacts, make it safer when in use, and strengthen the structure of the shell.

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

[0006] An auxiliary contact lead-out structure for a DC contactor, characterized in that it comprises a shell and two auxiliary contacts mounted on the shell, the shell comprising a bottom wall and a side wall enclosed and formed on the bottom wall, a mounting cavity being formed in the side wall; the two auxiliary contacts are symmetrically arranged and mounted on the side wall, a creepage distance is formed between the two auxiliary contacts, and the creepage distance is greater than the width of the bottom wall.

[0007] In the above technical solution, the two auxiliary contacts are arranged horizontally on the side wall of the shell, and the creepage distance between the two auxiliary contacts is greater than the width of the bottom wall; conventional auxiliary contacts are installed on the bottom wall like the main contacts. In this arrangement, the creepage distance between the two auxiliary contacts is smaller than the width of the bottom wall, which is prone to creepage. In addition, the number of components set on the bottom wall is reduced, making the structure of the bottom wall more stable and improving the service life of the shell.

[0008] Preferably, the auxiliary contact is brazed on the side wall. In this technical solution, the auxiliary contact is brazed on the housing. The advantages of brazing are smooth joint surface and good air tightness, which makes the shape and size of the auxiliary contact more stable.

[0009] Preferably, at least one pair of reinforcing ribs are relatively constructed in the installation cavity, the bottom of the reinforcing ribs 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 improves the structural strength of the cover as a whole and improves the structural stability of the side wall, thereby preventing the structural stability of the side wall from being deteriorated when the auxiliary contact is installed on the side wall.

[0010] Preferably, two pairs of reinforcing ribs are relatively constructed in the installation cavity, and the two reinforcing ribs on one side are distributed on both sides of the auxiliary contact. In this technical solution, the arrangement of the two pairs of reinforcing ribs makes the structure of the shell more stable, and the reinforcing ribs on one side are symmetrically arranged on both sides of the auxiliary contact, so that the side wall structure on both sides of the auxiliary contact tends to be relatively stable.

[0011] Preferably, the inner ends of the two sides of the reinforcing ribs transition to the inner end surface of the side wall with an arc surface. In this technical solution, the inner ends of the two sides of the reinforcing ribs transition to the inner end surface of the side wall with an arc surface, which further increases the lateral connection area between the reinforcing ribs and the side wall, and improves the structural strength of the side wall.

[0012] Preferably, the outer end of the reinforcing rib is in an arc shape. In this technical solution, the outer end surface of the reinforcing rib protrudes from the outer end surface of the boss to 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. In addition, it should be noted that the upper end surface of the reinforcing rib is an inclined surface inclined inward and downward, which can relatively cooperate with the trend of inward assembly to avoid collision with internal brackets and insulating seats.

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

[0014] Preferably, the bottom wall, the side wall and the reinforcing ribs are made of ceramic material. In this technical solution, the bottom wall, the side wall and the reinforcing ribs are made of ceramic material, which has high structural strength and improved service life.

[0015] Preferably, two through holes for installing the main contacts are symmetrically provided on the bottom wall, and a reinforcement groove is constructed between the two through holes. In this technical solution, the through holes are relatively large, and a reinforcement groove is provided between the two to improve the structural strength of the bottom wall, thereby relatively improving the strength of the bottom wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the assembly diagram of auxiliary contacts and housing.

[0017] Figure 2 Schematic diagram of the arrangement of the reinforcement ribs in the shell.

[0018] Figure 3The figure is a cross-sectional schematic diagram of an auxiliary contact lead-out structure of a DC contactor when viewed from above.

[0019] Figure 4 The figure is a schematic cross-sectional view of the wide side of an auxiliary contact lead-out structure of a DC contactor.

[0020] Figure 5 Schematic diagram of the creepage distance L between auxiliary contacts in this case. DETAILED DESCRIPTION

[0021] 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.

[0022] 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 referred device or element 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] like Figures 1 to 5 An auxiliary contact lead-out structure of a DC contactor is shown, comprising a shell 1 and two auxiliary contacts 2 installed on the shell 1, wherein the shell 1 comprises a bottom wall 3 and a side wall 4 enclosed and formed on the bottom wall 3, and a mounting cavity 5 is formed in the side wall 4; the two auxiliary contacts 2 are symmetrically arranged and installed on the side wall 4, and a creepage distance L is formed between the two auxiliary contacts 2, and the creepage distance L is greater than the width of the bottom wall 3.

[0027] In the above technical solution, the two auxiliary contacts are arranged horizontally on the side wall of the shell, and the creepage distance between the two auxiliary contacts is greater than the width of the bottom wall; conventional auxiliary contacts are installed on the bottom wall like the main contacts. In this arrangement, the creepage distance between the two auxiliary contacts is smaller than the width of the bottom wall, which is prone to creepage. In addition, the number of components set on the bottom wall is reduced, making the structure of the bottom wall more stable and improving the service life of the shell.

[0028] Furthermore, the auxiliary contact 2 is brazed and arranged on the side wall 4. In this technical solution, the auxiliary contact is brazed and arranged on the housing. The advantages of brazing are smooth joint surface, good air tightness, and more stable shape and size of the auxiliary contact.

[0029] Furthermore, at least one pair of reinforcing ribs 6 are relatively constructed in the installation cavity 5, the bottom of the reinforcing ribs 6 is connected to the bottom wall 3, and the inner end is connected to the side wall 4. In this technical solution, the provision of the reinforcing ribs improves the structural strength of the cover as a whole and improves the structural stability of the side wall, thereby preventing the structural stability of the side wall from being deteriorated when the auxiliary contact is installed on the side wall.

[0030] Furthermore, two pairs of reinforcing ribs 6 are relatively constructed in the installation cavity 5, and the two reinforcing ribs 6 on one side are distributed on both sides of the auxiliary contact 2. In this technical solution, the arrangement of the two pairs of reinforcing ribs makes the structure of the housing more stable, and the reinforcing ribs on one side are symmetrically arranged on both sides of the auxiliary contact, so that the side wall structures on both sides of the auxiliary contact are relatively stable.

[0031] Furthermore, the inner ends of the two sides of the reinforcing rib 6 transition to the inner end surface of the side wall 4. In this technical solution, the inner ends of the two sides of the reinforcing rib transition to the inner end surface of the side wall, further increasing the lateral connection area between the reinforcing rib and the side wall, and improving the structural strength of the side wall.

[0032] Furthermore, the outer end of the reinforcing rib 6 is in an arc shape. In this technical solution, the outer end surface of the reinforcing rib protrudes from the outer end surface of the boss to 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. In addition, it should be noted that the upper end surface of the reinforcing rib is an inclined surface inclined inward and downward, which can relatively cooperate with the trend of inward assembly to avoid collision with internal brackets and insulating seats.

[0033] Furthermore, the bottom wall 3, the side wall 4 and the reinforcing rib 6 are integrally formed. In this technical solution, the bottom wall, the side wall and the reinforcing rib are integrally formed, the integrity is good, and the structural strength is further improved.

[0034] Furthermore, the bottom wall 3, the side wall 4 and the reinforcing ribs 6 are made of ceramic material. In this technical solution, the bottom wall, the side wall and the reinforcing ribs are made of ceramic material, which has high structural strength and improved service life.

[0035] Furthermore, two through holes 7 for installing the main contacts are symmetrically provided on the bottom wall 3, and a reinforcement groove 8 is constructed between the two through holes 7. In this technical solution, the through holes are relatively large, and a reinforcement groove is provided between the two to improve the structural strength of the bottom wall, thereby relatively improving the bottom wall strength.

[0036] In this specific embodiment, in view of the problems that the main contacts and auxiliary contacts in the existing contactor are both arranged on the bottom wall, the creepage distance between the auxiliary contacts is short, and there are more components arranged on the bottom wall, resulting in reduced strength, the above scheme increases the creepage distance between the auxiliary contacts and improves the safety of the contactor by arranging auxiliary contacts on the side walls, and reinforcing ribs are arranged on the inside of the shell to strengthen the structural strength of the shell, especially the structural strength of the side walls, so that the arrangement of the auxiliary contacts will not affect the structural strength of the side walls, thereby improving the life of the shell.

[0037] 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.

[0038] 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. An auxiliary contact lead-out structure of a DC contactor, characterized in that: The invention comprises a housing (1) and two auxiliary contacts (2) mounted on the housing (1), wherein the housing (1) comprises a bottom wall (3) and a side wall (4) enclosed and formed on the bottom wall (3), and a mounting cavity (5) is formed in the side wall (4); the two auxiliary contacts (2) are symmetrically arranged and mounted on the side wall (4), a creepage distance L is formed between the two auxiliary contacts (2), and the creepage distance L is greater than the width of the bottom wall (3).

2. The auxiliary contact lead-out structure of a DC contactor according to claim 1, characterized in that: The auxiliary contact (2) is brazed and arranged on the side wall (4).

3. The auxiliary contact lead-out structure of a DC contactor according to claim 1, characterized in that: At least one pair of reinforcing ribs (6) are relatively constructed in the installation cavity (5); the bottom of the reinforcing rib (6) is connected to the bottom wall (3), and the inner end is connected to the side wall (4).

4. The auxiliary contact lead-out structure of a DC contactor according to claim 3, characterized in that: Two pairs of reinforcing ribs (6) are relatively constructed in the installation cavity (5), and the two reinforcing ribs (6) on one side are distributed on both sides of the auxiliary contact (2).

5. The auxiliary contact lead-out structure of a DC contactor according to claim 4, characterized in that: There is an arc transition between the inner ends of both sides of the reinforcing rib (6) and the inner end surface of the side wall (4).

6. The auxiliary contact lead-out structure of a DC contactor according to claim 5, characterized in that: The outer end of the reinforcing rib (6) is in an arc shape.

7. The auxiliary contact lead-out structure of a DC contactor according to claim 4, characterized in that: The bottom wall (3), the side wall (4) and the reinforcing ribs (6) are integrally formed.

8. The auxiliary contact lead-out structure of a DC contactor according to claim 7, characterized in that: The bottom wall (3), the side wall (4) and the reinforcing ribs (6) are made of ceramic material.

9. The auxiliary contact lead-out structure of a DC contactor according to claim 1, characterized in that: Two through holes (7) for mounting main contacts are symmetrically provided on the bottom wall (3), and a reinforcement groove (8) is constructed between the two through holes (7).

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