High-voltage direct current contactor

Abstract

The utility model relates to the technical field of contactors, in particular to a high-voltage direct-current contactor which comprises a pair of main contacts, a pair of auxiliary contacts, a driving reed, an auxiliary movable reed and a pushing assembly, and when the pushing assembly acts, the driving reed can be driven to be in contact with or separated from the pair of main contacts; the auxiliary movable contact spring is installed on the pushing assembly and moves synchronously along with the pushing assembly. The electric connector is characterized in that the pushing assembly at least comprises an insulating base located below the driving reed, the auxiliary movable reed comprises a connecting part and contact parts formed on the two sides of the connecting part, the contact parts make contact with or are separated from the pair of auxiliary contacts when the pushing assembly acts, the auxiliary movable reed and the insulating base are integrally formed in an injection molding mode, and the auxiliary movable reed is arranged on the insulating base. The connecting part is formed on the inner side of the insulating seat, and the contact part extends out of the insulating seat. According to the technical scheme, the connecting part of the auxiliary movable contact spring is injection-molded in the insulating seat, so that the structural stability of the auxiliary movable contact spring is greatly improved, and the auxiliary movable contact spring is not easy to loosen.

Description

Technical Field

[0001] The utility model relates to the technical field of contactors, in particular to a high-voltage direct current 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] In the existing contactor, an auxiliary movable spring is provided to cooperate with the auxiliary contact, and the auxiliary movable spring is often installed separately from the base in the contactor, or although part of the auxiliary movable spring is formed in the base, the contact pieces on both sides are still separate and independent, and the structural stability is poor. In this case, the auxiliary movable spring will generate large vibrations during the process of being pushed and frequently moved, making the auxiliary movable spring easy to fall off or break, reducing the monitoring effect of the auxiliary movable spring assembly, and even causing the auxiliary movable spring assembly to fail, and in severe cases, causing damage to the contactor. Summary of the invention

[0004] In order to solve the above problems, the purpose of the utility model is to provide a high-voltage DC contactor, in which the auxiliary moving spring is an integrated structure, and the middle part is injection-molded in the insulating seat, the structural stability is greatly enhanced, not easy to be damaged, and the integral injection molding directly installs the whole as a whole, which is lower than the cost of installing the auxiliary moving spring separately before.

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

[0006] A high-voltage DC contactor comprises a pair of main contacts, a pair of auxiliary contacts, an active spring, an auxiliary movable spring and a pushing assembly, wherein the pushing assembly can drive the active spring to contact or separate from the pair of main contacts when in motion; the auxiliary movable spring is mounted on the pushing assembly and moves synchronously with the pushing assembly; the characteristic is that the pushing assembly at least comprises an insulating seat located below the active spring, the auxiliary movable spring comprises a connecting portion and contact portions formed on both sides of the connecting portion, the contact portions contact or separate from the pair of auxiliary contacts when the pushing assembly is in motion, the auxiliary movable spring is integrally injection-molded with the insulating seat, the connecting portion is formed on the inner side of the insulating seat, and the contact portion extends out of the insulating seat.

[0007] In the above technical solution, the auxiliary movable spring is integrally formed by the connecting part and the contact parts on both sides, so its own structural stability is high. Furthermore, the connecting part is injection-molded in the insulating seat, which greatly improves the structural stability of the auxiliary movable spring and makes the auxiliary movable spring not easy to loosen. The insulating seat and the auxiliary movable spring are assembled as a whole after integral injection molding, avoiding the inconvenience of independent installation of the auxiliary movable spring and the insulating seat.

[0008] Preferably, the contact portion includes at least one U-shaped elastic segment and a contact piece formed on the U-shaped elastic segment and cooperating with the auxiliary contact. In this technical solution, the contact piece in the contact portion cooperates with the auxiliary contact, and the provision of at least one U-shaped elastic segment enables the contact piece to maintain elastic contact after repeated contact.

[0009] Preferably, the U-shaped elastic segment has two segments, including a first U-shaped elastic segment and a second U-shaped elastic segment from the inside to the outside, and the first U-shaped elastic segment is in an inverted U shape and is connected and matched with the second U-shaped elastic segment. In this technical solution, the U-shaped elastic segment has two segments, which greatly improves the elastic resistance performance of the contact part, is not easy to deform, has a fast reset response, and has a stable structure.

[0010] Preferably, an arc segment is formed between the first U-shaped elastic segment and the connecting portion. In this technical solution, the arrangement of the arc segment further improves the elastic performance of the contact portion, making its structure more stable.

[0011] Preferably, the contact piece is arranged horizontally. In this technical solution, the contact piece is arranged horizontally so that the contact surface between the contact piece and the auxiliary contact point is always in a good state.

[0012] Preferably, the pushing assembly further comprises a push rod, a spring, a bracket, a magnet and a magnetic block, wherein the upper end of the push rod is fixed in an insulating seat, the lower part of the bracket is injection molded in the insulating seat and does not contact the connecting part, and the active spring is transversely passed in the bracket; the magnet is U-shaped, with both sides clamped on the active spring, and the two ends of the spring are elastically abutted on the insulating seat and the magnet respectively; the magnetic block is fixed to the upper lower end of the bracket, and the magnet block and the magnet are arranged opposite to each other up and down, and the magnet block and the magnet can be magnetized and generate mutual attraction under the action of the magnetic field formed when the active spring is in contact with the two main contacts. In this technical solution, the lower part of the bracket is injection molded in the insulating seat, and the overall structure is more stable, and the two sides of the magnet are clamped on the active spring, and the matching structure is not easy to loosen.

[0013] Preferably, it also includes a ceramic cover, wherein the pair of main contacts, the pair of auxiliary contacts, the active spring, the auxiliary movable spring and the insulating seat are arranged in the ceramic cover, and the ceramic cover includes a bottom wall and a side wall formed on the bottom wall; the side wall is recessed inward to form 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 an installation groove is constructed on the inner side of the lead-out groove, and the auxiliary contact is penetrated on the installation groove, one end of the auxiliary contact extends into the lead-out groove, and the other end extends into the ceramic cover. In this 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.

[0014] Preferably, the lead-out groove forms a boss in the mounting 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; the upper end of the reinforcing rib extends out of the upper end of the boss; the inner ends of both sides of the reinforcing rib form an arc transition with the inner end surface of the side wall and the boss; the outer end surface of the reinforcing rib extends out of the outer end surface of the boss and is in an arc shape; the reinforcing rib is made of ceramic material, and the bottom wall, side wall and reinforcing rib are integrally formed. In this technical solution, the provision of the reinforcing rib not only further improves the structural strength of the cover body 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. The reinforcing rib is made of ceramic material, and the bottom wall, side wall and reinforcing rib are integrally formed, with good integrity and further improved structural strength.

[0015] 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.

[0016] 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 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 provided between the two, which relatively improves the strength of the bottom wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The figure is a partial structural schematic diagram of a high voltage DC contactor.

[0018] Figure 2This is a partial structural schematic diagram of a high-voltage DC contactor from another perspective.

[0019] Figure 3 It is a schematic diagram of the relative arrangement of the active reed and the auxiliary moving reed.

[0020] Figure 4 It is a schematic diagram of the assembly of the bracket, auxiliary moving spring and insulating seat.

[0021] Figure 5 It is a schematic diagram of the relative arrangement of the bracket and the auxiliary moving spring.

[0022] Figure 6 It is a schematic diagram of the three-dimensional structure of the auxiliary moving reed.

[0023] Figure 7 It is a schematic diagram of the assembly of the active reed and the magnetic conductor.

[0024] Figure 8 It is a schematic diagram of the three-dimensional structure of the ceramic cover. Implementation

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] like Figures 1 to 8 A high-voltage DC contactor shown in the figure includes a pair of main contacts, a pair of auxiliary contacts 1, an active spring 2, an auxiliary movable spring 3 and a pushing component. When the pushing component is in motion, it can drive the active spring 2 to contact or separate from the pair of main contacts; the auxiliary movable spring 3 is installed on the pushing component and moves synchronously with the pushing component; it is characterized in that: the pushing component at least includes an insulating seat 4 located below the active spring 2, the auxiliary movable spring 3 includes a connecting portion 5 and a contact portion 6 formed on both sides of the connecting portion 5, the contact portion 6 contacts or separates from the pair of auxiliary contacts 1 when the pushing component is in motion, the auxiliary movable spring 3 and the insulating seat 4 are integrally injection molded, the connecting portion 5 is formed on the inner side of the insulating seat 4, and the contact portion 6 extends out of the insulating seat 4.

[0031] In the above technical solution, the auxiliary movable spring is integrally formed by the connecting part and the contact parts on both sides, so its own structural stability is high. Furthermore, the connecting part is injection-molded in the insulating seat, which greatly improves the structural stability of the auxiliary movable spring and makes the auxiliary movable spring not easy to loosen. The insulating seat and the auxiliary movable spring are assembled as a whole after integral injection molding, avoiding the inconvenience of independent installation of the auxiliary movable spring and the insulating seat.

[0032] Furthermore, the contact portion 6 includes at least one U-shaped elastic segment and a contact piece 7 formed on the U-shaped elastic segment and matched with the auxiliary contact 1. In this technical solution, the contact piece in the contact portion matches with the auxiliary contact, and the provision of at least one U-shaped elastic segment enables the contact piece to maintain elastic contact after repeated contact.

[0033] Furthermore, the U-shaped elastic section has two sections, including a first U-shaped elastic section 8 and a second U-shaped elastic section 9 from the inside to the outside, and the first U-shaped elastic section 8 is in an inverted U shape and is connected and matched with the second U-shaped elastic section 9. In this technical solution, the U-shaped elastic section has two sections, which greatly improves the elastic resistance performance of the contact part, is not easy to deform, has a fast reset response, and has a stable structure.

[0034] Furthermore, an arc segment 10 is formed between the first U-shaped elastic segment 8 and the connecting portion 5. In this technical solution, the provision of the arc segment further improves the elastic performance of the contact portion, making its structure more stable.

[0035] Furthermore, the contact piece 7 is arranged horizontally. In this technical solution, the contact piece is arranged horizontally so that the contact surface between the contact piece and the auxiliary contact point is always kept in a good state.

[0036] Furthermore, the push assembly also includes a push rod 11, a spring 12, a bracket 13, a magnet 14 and a magnetic block 15, the upper end of the push rod 11 is fixed in the insulating seat 4, the lower part of the bracket 13 is injection molded in the insulating seat 4 and does not contact the connecting part 5, and the active spring 2 crosses in the bracket 13; the magnet 14 is U-shaped, and the two sides are clamped on the active spring 2, and the two ends of the spring 12 are elastically abutted on the insulating seat 4 and the magnet 14 respectively; the magnetic block 15 is fixed to the upper and lower ends of the bracket 13, and the magnetic block 15 and the magnet 14 are arranged opposite to each other up and down, and the magnetic block 15 and the magnet 14 can be magnetized under the action of the magnetic field formed when the active spring 2 is in contact with the two main contacts, and generate mutual attraction. In this technical solution, the lower part of the bracket is injection molded in the insulating seat, the overall structure is more stable, and the two sides of the magnet are clamped on the active spring, and the matching structure is not easy to loosen.

[0037] Furthermore, the contactor also includes a ceramic cover 16, the pair of main contacts, the pair of auxiliary contacts 1, the active spring 2, the auxiliary moving spring 3 and the insulating seat 4 are arranged in the ceramic cover 16, and the ceramic cover 16 includes a bottom wall 17 and a side wall 18 enclosed and formed on the bottom wall 17; the side wall 18 is recessed inward to form two lead-out grooves 19, the upper part of the lead-out groove 19 forms an opening on the bottom wall 17, and the lower part of the lead-out groove 19 forms an assembly surface 20 relative to the opening, and the assembly surface 20 is an inclined surface from high to low from the inside to the outside, and an installation groove is constructed on the inner side of the lead-out groove 19, and the auxiliary contact 1 is penetrated on the installation groove, one end of the auxiliary contact 1 extends into the lead-out groove 19, and the other end extends into the ceramic cover 16. In this 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.

[0038] Furthermore, the lead-out groove 19 forms a boss 21 in the installation cavity, and the two side ends of the boss 21 are constructed with reinforcing ribs 22, the bottom of the reinforcing rib 22 is connected to the bottom wall 17, and the inner end is connected to the side wall 18; the upper end of the reinforcing rib 22 extends out of the upper end of the boss 21; the inner ends of both sides of the reinforcing rib 22 and the inner end surface of the side wall 18 and the boss 21 are in an arc transition; the outer end surface of the reinforcing rib 22 extends out of the outer end surface of the boss 21 and is in an arc shape; the reinforcing rib 22 is made of ceramic material, and the bottom wall 17, the side wall 18 and the reinforcing rib 22 are integrally formed. In this technical solution, the setting of the reinforcing rib 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, so that the arrangement of the auxiliary contacts in the lead-out groove is more stable. The reinforcing rib is made of ceramic material, and the bottom wall, the side wall and the reinforcing rib are integrally formed, with good integrity and further improved structural strength.

[0039] Furthermore, the auxiliary contact 1 is brazed and arranged on the ceramic cover 16. 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.

[0040] Furthermore, two through holes 23 for installing the main contacts are symmetrically provided on the bottom wall 17, and a reinforcement groove 24 is constructed between the two lead-out grooves 19 and the two through holes 23 on the bottom wall 17. 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 provided between the two, which relatively improves the strength of the bottom wall.

[0041] In this specific embodiment, in order to solve the problem that the existing auxiliary movable spring piece is easy to loosen during installation, the above scheme greatly improves the structural stability of the auxiliary movable spring piece by forming the connecting part of the auxiliary movable spring piece and the contact parts on both sides into one piece, and then injecting the connecting part into the insulating seat, and arranging two U-shaped elastic parts on the contact part, so that the auxiliary movable spring piece is not easy to loosen, and the insulating seat after integral injection molding is integrally assembled with the auxiliary movable spring piece, avoiding the inconvenience of independent installation of the auxiliary movable spring piece and the insulating seat. In addition, the ceramic cover has a special-shaped structure, high structural strength, and improved service life.

[0042] 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.

[0043] 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 high-voltage DC contactor, comprising a pair of main contacts, a pair of auxiliary contacts (1), an active spring (2), an auxiliary movable spring (3) and a push assembly, wherein the push assembly can drive the active spring (2) to contact or separate from the pair of main contacts when in motion; the auxiliary movable spring (3) is mounted on the push assembly and moves synchronously with the push assembly; and is characterized in that: The pushing component at least comprises an insulating seat (4) located below the active spring (2); the auxiliary moving spring (3) comprises a connecting portion (5) and contact portions (6) formed on both sides of the connecting portion (5); the contact portions (6) contact or separate with a pair of auxiliary contacts (1) when the pushing component is in motion; the auxiliary moving spring (3) and the insulating seat (4) are integrally injection molded; the connecting portion (5) is formed on the inner side of the insulating seat (4), and the contact portion (6) extends out of the insulating seat (4).

2. A high voltage DC contactor according to claim 1, characterized in that: The contact portion (6) comprises at least one U-shaped elastic segment and a contact sheet (7) formed on the U-shaped elastic segment and cooperating with the auxiliary contact (1).

3. A high voltage DC contactor according to claim 2, characterized in that: The U-shaped elastic section has two sections, including a first U-shaped elastic section (8) and a second U-shaped elastic section (9) from the inside to the outside, and the first U-shaped elastic section (8) is in an inverted U shape and is connected and matched with the second U-shaped elastic section (9).

4. A high voltage DC contactor according to claim 3, characterized in that: An arc segment (10) is formed between the first U-shaped elastic segment (8) and the connecting portion (5).

5. A high voltage DC contactor according to claim 2, characterized in that: The contact piece (7) is arranged horizontally.

6. A high voltage DC contactor according to claim 1, characterized in that: The pushing assembly further comprises a push rod (11), a spring (12), a bracket (13), a magnet (14) and a magnet block (15); the upper end of the push rod (11) is fixed in the insulating seat (4); the lower part of the bracket (13) is injection-molded in the insulating seat (4) and does not contact the connecting part (5); the active spring (2) crosses the bracket (13); the magnet (14) is U-shaped, with two sides clamped on the active spring (2); the two ends of the spring (12) are elastically abutted on the insulating seat (4) and the magnet (14) respectively; the magnet block (15) is fixed to the upper and lower ends of the bracket (13); the magnet block (15) and the magnet (14) are arranged opposite to each other in the upper and lower parts; the magnet block (15) and the magnet (14) can be magnetized under the action of the magnetic field formed when the active spring (2) is in contact with the two main contacts, and generate mutual attraction.

7. A high voltage DC contactor according to claim 1, characterized in that: It also includes a ceramic cover (16), wherein the pair of main contacts, the pair of auxiliary contacts (1), the active spring (2), the auxiliary active spring (3) and the insulating seat (4) are arranged in the ceramic cover (16), and the ceramic cover (16) includes a bottom wall (17) and a side wall (18) formed on the bottom wall (17); the side wall (18) is recessed inward to form two lead-out grooves (19), the upper part of the lead-out groove (19) forms an opening on the bottom wall (17), and the lower part of the lead-out groove (19) forms an assembly surface (20) relative to the opening, and the assembly surface (20) is an inclined surface from high to low from the inside to the outside, and the inner side of the lead-out groove (19) is constructed with a mounting groove, and the auxiliary contact (1) is inserted into the mounting groove, and one end of the auxiliary contact (1) extends into the lead-out groove (19), and the other end extends into the ceramic cover (16).

8. A high voltage DC contactor according to claim 7, characterized in that: The lead-out groove (19) forms a boss (21) in the installation cavity, and reinforcing ribs (22) are constructed on both side ends of the boss (21); the bottom of the reinforcing rib (22) is connected to the bottom wall (17), and the inner end is connected to the side wall (18); the upper end of the reinforcing rib (22) extends out of the upper end of the boss (21); the inner ends of both sides of the reinforcing rib (22) and the inner end surface of the side wall (18) and the boss (21) form an arc transition; the outer end surface of the reinforcing rib (22) extends out of the outer end surface of the boss (21) and is in an arc shape; the reinforcing rib (22) is made of ceramic material, and the bottom wall (17), the side wall (18) and the reinforcing rib (22) are integrally formed.

9. A high voltage DC contactor according to claim 7, characterized in that: The auxiliary contact (1) is brazed and arranged on the ceramic cover (16).

10. A high voltage DC contactor according to claim 7, characterized in that: Two through holes (23) for mounting main contacts are symmetrically provided on the bottom wall (17), and a reinforcement groove (24) is constructed on the bottom wall (17) between the two lead-out grooves (19) and the two through holes (23).

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