High-voltage direct-current contactor with connector leading-out form

Abstract

The utility model discloses a high-voltage direct-current contactor with a connector leading-out form. The high-voltage direct-current contactor comprises a shell, an end cover which covers the opening side of the shell in a sealing manner, and an arc extinguishing cover, a guide plate and a coil assembly which are all arranged in an inner cavity of the shell, the coil assembly is provided with a framework for winding a coil and a coil terminal arranged on the framework and electrically connected with the coil, and the end cover is provided with a coil leading-out terminal used for being connected with external equipment A; the control circuit board is used for controlling the coil to work, the conversion terminal A and the conversion terminal B are electrically connected with the control circuit board, the conversion terminal A is further connected with the coil terminal in a clamped mode, and the conversion terminal B is further fixedly connected with the coil leading-out terminal in a welded mode. The high-voltage direct-current contactor is simple, reasonable and novel in structure and easy to produce and implement, the production cost is reduced, and the production efficiency, the product quality and the yield are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of contactors, in particular to a high-voltage DC contactor with a connector lead-out form. Background Art

[0002] An epoxy-encapsulated high-voltage DC contactor is an electrical component that controls the on / off switching of high-voltage DC circuits. It primarily controls the circuit by disconnecting or connecting the current in the DC circuit. Compared to conventional AC contactors, it offers higher withstand voltage, interrupting capacity, and better electrical performance. Currently, epoxy-encapsulated high-voltage DC contactors are widely used in industries such as power systems, rail transit, new energy, and energy storage.

[0003] In epoxy-encapsulated high-voltage DC contactors currently on the market, the coil control terminals are often wired. However, this method is not only difficult to control during the manufacturing process, increasing production costs, but is also prone to poor wire connections, resulting in high product defect / scrap rates, seriously impacting the production and development of contactor products.

[0004] In view of this, the present utility model is proposed. Summary of the Invention

[0005] In order to overcome the above defects, the utility model provides a high-voltage DC contactor with a connector lead-out form, which has a simple, reasonable and novel structure, is easy to produce and implement, reduces production costs, and improves production efficiency, product quality and yield.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a high-voltage DC contactor with a connector lead-out form, comprising a shell, an end cover sealed on the opening side of the shell, and an arc extinguishing cover, a guide plate and a coil assembly all arranged in the inner cavity of the shell; the coil assembly is provided with a skeleton for winding the coil and a coil terminal arranged on the skeleton and electrically connected to the coil, and the end cover is provided with a coil lead-out terminal for connecting to an external device A; the arc extinguishing cover is provided with a control circuit board for controlling the operation of the coil, and a conversion terminal A and a conversion terminal B respectively electrically connected to the control circuit board, and the conversion terminal A is also snap-connected to the coil terminal, and the conversion terminal B is also welded and fixedly connected to the coil lead-out terminal.

[0007] As a further improvement of the present invention, the opening side of the housing is defined as the upper side, and the arc extinguishing cover, the guide plate and the frame are arranged in sequence from top to bottom.

[0008] As a further improvement of the present invention, a mounting block is integrally provided on the top side of the skeleton, and the coil terminal is partially embedded in the mounting block; in addition, a snap-fit ​​block portion is formed on the portion of the coil terminal exposed outside the mounting block for snap-fitting with the conversion terminal A.

[0009] As a further improvement of the present invention, the skeleton adopts an I-wheel structure; the skeleton, the mounting block and the coil terminal are fixedly connected into one body through an injection molding process; or, the skeleton and the mounting block are injection molded as one body, and the coil terminal is partially press-fitted into the mounting block.

[0010] As a further improvement of the present invention, the arc extinguishing hood is provided with an arc extinguishing cover body and an arc extinguishing wall body fixedly connected to the lower side of the arc extinguishing cover body;

[0011] The control circuit board is fixedly arranged on the top side of the arc extinguishing cover body, the conversion terminal A and the conversion terminal B are both arranged vertically, and at the same time, the upper end of the conversion terminal A is welded and fixedly connected to the control circuit board, the lower end of the conversion terminal A is extended into the space formed by the arc extinguishing cover body and the arc extinguishing wall body, the lower end of the conversion terminal B is welded and fixedly connected to the control circuit board, and the upper end of the conversion terminal B is welded and fixedly connected to the coil lead-out terminal.

[0012] As a further improvement of the present invention, a clamping groove for clamping and cooperating with the clamping block portion is integrally provided on the lower end of the conversion terminal A.

[0013] As a further improvement of the present invention, the arc extinguishing cover is provided with a mounting hole for mounting the static contact;

[0014] The card slot is a U-shaped slot structure with an opening facing downward, and a guiding slope is formed on the inner wall of the opening of the card slot.

[0015] As a further improvement of the present invention, the end cover is further provided with an auxiliary switch lead terminal for connecting to an external device B;

[0016] The high-voltage DC contactor is also provided with an auxiliary switch assembly, which is provided with a micro switch and a transfer terminal electrically connected to the micro switch. The micro switch is arranged on the guide plate, and the transfer terminal passes through the arc extinguishing cover and is welded and fixedly connected to the auxiliary switch lead terminal.

[0017] As a further improvement of the present invention, the coil lead-out terminal and the auxiliary switch lead-out terminal are fixedly connected to the end cover through an injection molding process or a press-fitting process.

[0018] As a further improvement of the present invention, the guide plate is provided with a plate body fixedly arranged on the lower side of the arc extinguishing wall body, a receiving block integrally provided on one side of the plate body and for fixing the micro switch, and a avoiding portion recessed on the other side of the plate body and used to avoid the mounting block;

[0019] The arc extinguishing cover is also provided with a through hole A for the adapter terminal to pass through.

[0020] The beneficial effects of the present invention are as follows: Compared with the prior art, ① the present invention improves the structure of the high-voltage DC contactor product and designs the lead-out method of its "coil assembly" and "auxiliary switch assembly" to be a connector lead-out form. This greatly reduces the difficulty of control during the production and manufacturing process of the contactor product, making its production easy to implement, thereby improving production efficiency and reducing production costs; and also based on the fact that the connector (i.e., each terminal) is not easily damaged or damaged during the production and manufacturing process, thereby improving the quality and yield of the contactor product. ② The present invention also specifically optimizes the connection method between the coil terminal and the conversion terminal A to a snap-on connection, which can achieve convenient, fast, and reliable assembly between the coil terminal and the conversion terminal A while being less affected by the size of the shell volume, thereby facilitating high-efficiency and high-accuracy assembly of the product. ③ The connector lead-out form provided by the present invention has a simple, reasonable, and novel structure, is easy to process and manufacture, and has a low manufacturing cost. In short, the present invention greatly promotes the production and development of high-voltage DC contactor products by making the above-mentioned structural improvements to the high-voltage DC contactor product. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the exploded structure of the high-voltage DC contactor of the present invention;

[0022] Figure 2 This is a schematic cross-sectional view of the high-voltage DC contactor of the present invention (partial view);

[0023] Figure 3 This is a schematic diagram of the assembly structure of the coil lead terminal and the auxiliary switch lead terminal of the utility model assembled on the end cover;

[0024] Figure 4 This is a schematic diagram of the assembly structure of the control circuit board, conversion terminal A and conversion terminal B of the utility model assembled on the arc extinguishing cover;

[0025] Figure 5 for Figure 4 A schematic cross-sectional view of the assembly structure shown;

[0026] Figure 6 for Figure 5An enlarged structural diagram of part A is shown;

[0027] Figure 7 This is a schematic diagram of the assembly structure of the auxiliary switch assembly of the present invention assembled on the guide plate;

[0028] Figure 8 for Figure 7 The structural schematic diagram of the guide plate shown is in another perspective;

[0029] Figure 9 This is a schematic structural diagram of the coil assembly of the present invention;

[0030] Figure 10 for Figure 9 The enlarged structural diagram of part B is shown.

[0031] The following description is made with reference to the accompanying drawings:

[0032] 1. Outer shell; 2. End cover; 3. Arc extinguishing cover; 30. Arc extinguishing cover body; 31. Arc extinguishing wall body; 32. Perforation A; 4. Guide plate; 40. Plate body; 41. Receiving block; 42. Avoidance part; 5. Coil assembly; 51. Skeleton; 52. Coil terminal; 520. Clamping block; 53. Mounting block; 60. Coil lead-out terminal; 61. Auxiliary switch lead-out terminal; 70. Control circuit board; 71. Conversion terminal A; 710. Clamping slot; 711. Guide slope; 72. Conversion terminal B; 8. Auxiliary switch assembly; 80. Micro switch; 81. Transfer terminal; 82. Push rod; 9. Static contact; 10. Push rod; 11. Moving contact piece; 12. Upper cover; 13. Iron cup. DETAILED DESCRIPTION

[0033] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0034] Example 1:

[0035] Please see the attached Figure 1 To the attached Figure 10As shown, this embodiment 1 provides a high-voltage DC contactor with a connector lead-out form, which mainly includes a housing 1, an end cover 2 sealed on the open side of the housing 1, and an arc extinguishing cover 3, a guide plate 4, a coil assembly 5 and an auxiliary switch assembly 8, all of which are arranged in the inner cavity of the housing 1, wherein the end cover 2 is provided with a coil lead-out terminal 60 for connecting to an external device A (such as a power supply device) and an auxiliary switch lead-out terminal 61 for connecting to an external device B (such as a signal detection device); the coil assembly 5 is provided with a skeleton 51 for winding a coil (not shown in the figure, but does not affect the technical understanding) and a coil terminal 52 provided on the skeleton 51 and electrically connected to the coil. (i.e.: the coil terminal 52 is welded to one end of the coil); the arc extinguishing cover 3 is provided with a control circuit board 70 for controlling the operation of the coil, and a conversion terminal A71 and a conversion terminal B72 electrically connected to the control circuit board 70 respectively, and the conversion terminal A71 is also snap-connected to the coil terminal 52, and the conversion terminal B72 is also welded and fixedly connected to the coil lead-out terminal 60; the auxiliary switch assembly 8 is provided with a micro switch 80 and a transfer terminal 81 electrically connected to the micro switch 80, the micro switch 80 is arranged on the guide plate 4, and the transfer terminal 81 passes through the arc extinguishing cover 3 and is welded and fixedly connected to the auxiliary switch lead-out terminal 61.

[0036] From the above, it can be seen that ① the present invention improves the structure of the high-voltage DC contactor product and designs the lead-out method of its "coil assembly" and "auxiliary switch assembly" to be a connector lead-out form. This greatly reduces the difficulty of control during the production and manufacturing process of the contactor product, making its production easy to implement, thereby improving production efficiency and reducing production costs; and also based on the fact that the connector (i.e., each terminal) is not easily damaged or damaged during the production and manufacturing process, thereby improving the quality and yield of the contactor product. ② The present invention also specifically optimizes the connection method between the coil terminal 52 and the conversion terminal A71 to a snap-on connection, which can achieve convenient, fast, and reliable assembly between the coil terminal 52 and the conversion terminal A71, while not being easily affected by the volume size of the housing 1, which is conducive to high-efficiency and high-accuracy assembly of the product. ③ The connector lead-out form provided by the present invention has a simple, reasonable, and novel structure, is easy to process and manufacture, and has a low manufacturing cost. In short, the present invention greatly promotes the production and development of high-voltage DC contactor products by making the above-mentioned structural improvements to the high-voltage DC contactor product.

[0037] The specific structure of the high-voltage DC contactor with a connector lead-out form described in this embodiment is described in detail below.

[0038] First, regarding the layout of the various components / assemblies in the high-voltage DC contactor product.

[0039] Please continue to refer to the attached Figure 2 As shown, in this embodiment 1, if the opening side of the shell 1 is defined as the upper side, accordingly, the end cover 2, the arc extinguishing cover 3, the guide plate 4 and the skeleton 51 are arranged in sequence from top to bottom, and the auxiliary switch assembly 8 is located in the space inside the arc extinguishing cover 3.

[0040] Next, the specific molding methods of the components / assemblies in the high-voltage DC contactor product and the connection methods between them are described.

[0041] Please continue to refer to the attached Figure 1 and 3 As shown, in this embodiment 1, the coil lead terminal 60 and the auxiliary switch lead terminal 61 are fixedly connected to the end cover 2 through an injection molding process or a press-fitting process. It can be understood that the end cover 2 is made of insulating plastic material, and the coil lead terminal 60 and the auxiliary switch lead terminal 61 are made of copper. Moreover, based on product design requirements, ① the coil lead terminal 60 and the auxiliary switch lead terminal 61 are respectively arranged on opposite sides of the end cover 2. ② In this embodiment 1, the coil lead terminal 60 and the auxiliary switch lead terminal 61 are preferably fixedly arranged on the end cover 2 through a press-fitting process.

[0042] In addition, based on product design requirements, a through hole is also opened on the end cover 2 for the static contact 9 to pass through.

[0043] Please continue to refer to the attached Figure 1 and 2 , Attachment Figure 9 and 10 As shown, in this embodiment 1, a mounting block 53 is integrally provided on the top side of the skeleton 51, and the coil terminal 52 is partially buried in the mounting block 53. Moreover, a snap-fit ​​block portion 520 is formed on the portion of the coil terminal 52 exposed outside the mounting block 53 for snap-fitting with the conversion terminal A71.

[0044] Furthermore, the frame 51 utilizes an I-shaped wheel structure, and the frame 51, the mounting block 53, and the coil terminals 52 are integrally connected via injection molding. Therefore, the frame 51 and the mounting block 53 are both made of insulating plastic, while the coil terminals 52 are made of copper. Alternatively, in practical applications, the following molding method can be employed: after integrally connecting the frame 51 and the mounting block 53 via injection molding, the coil terminals 52 are partially press-fitted into the mounting block 53 via a press-fit process.

[0045] Please continue to refer to the attached Figure 1 and 2 , and attached Figure 4 and 5 As shown, in this embodiment 1, the arc extinguishing hood 3 is provided with an arc extinguishing cover 30 and an arc extinguishing wall 31 fixedly connected to the lower side of the arc extinguishing cover 30. Based on the above structure of the arc extinguishing hood 3, the control circuit board 70 is fixedly arranged on the top side of the arc extinguishing cover 30 by gluing. The conversion terminal A71 and the conversion terminal B72 are both arranged vertically, and the upper end of the conversion terminal A71 is welded and fixedly connected to the control circuit board 70. The lower end of the conversion terminal A71 is extended into the space enclosed by the arc extinguishing cover 30 and the arc extinguishing wall 31. The lower end of the conversion terminal B72 is welded and fixedly connected to the control circuit board 70, and the upper end of the conversion terminal B72 is welded and fixedly connected to the coil lead terminal 60.

[0046] Furthermore, based on product design requirements, the arc extinguishing cover 3 is made of ceramic or insulating plastic material; the arc extinguishing cover body 30 is provided with a mounting hole for installing the static contact 9, and it can be understood that the mounting hole corresponds one-to-one to the through hole; and the arc extinguishing cover body 30 is also provided with a through hole A32 for the adapter terminal 81 to pass through.

[0047] Furthermore, based on product design requirements, in this embodiment 1, a card slot 710 is integrally provided on the lower end of the conversion terminal A71 for card connection with the coil terminal 52 (specifically, the card block 520); Figure 6 shown.

[0048] Furthermore, the slot 710 is a U-shaped slot structure with an opening facing downward, and a guiding slope 711 is formed on the inner wall of the opening of the slot 710 to facilitate the slot 710 to be easily and accurately connected to the connecting block 520.

[0049] Please continue to refer to the attached Figure 1 and 2 , and attached Figure 7 and 8As shown, in this embodiment 1, the guide plate 4 is made of insulating plastic material, and the guide plate 4 is provided with a plate body 40, a receiving block 41 integrally provided on one side of the plate body 40, and a avoidance portion 42 recessed on the other side of the plate body 40, wherein the plate body 40 can be fixedly arranged on the lower side of the arc extinguishing wall 31 by snap connection, riveting, gluing or welding (this example preferably adopts a snap connection method, which can be understood that the plate body 40 and the arc extinguishing wall 31 are respectively formed with snap-fitting structural features, such as: blocks, slots, etc.; which belong to conventional technical means, so they are not described in detail here), that is, the guide plate 4 and the arc extinguishing cover 3 together form an arc extinguishing cavity / or arc extinguishing space; the receiving block 41 is used for fixed setting / installation of the micro switch 80, and the avoidance portion 42 is used to avoid the mounting block 53, which can be attached Figure 2 It can be seen in.

[0050] Furthermore, the plate body 40 is provided with a through hole B for the push rod 10 to pass through, and the moving contact piece 11 and the push rod 82 in the auxiliary switch assembly 8 are both installed on the push rod 10.

[0051] In addition, in this embodiment 1, the high voltage DC contactor is further provided with an upper cover 12 and an iron cup 13. Please continue to refer to the attached Figure 1 and 2 As shown, the upper cover 12 is arranged beside the outer side of the end cover 2, and is detachably fixed to the open side of the shell 1; the iron cup 13 is a hollow cylindrical structure with an opening on the top side, and is coaxially arranged with the shell 1 and built into the shell 1, and at the same time, the middle and lower outer walls of the iron cup 13 are seamlessly connected to the lower inner wall of the shell 1, and there is a gap between the upper outer wall of the iron cup 13 and the upper inner wall of the shell 1; the arc extinguishing cover 3, the guide plate 4 and the coil assembly 5 are all built into the iron cup 13 and are coaxially arranged with the iron cup 13, and the upper part of the arc extinguishing cover 30 and the arc extinguishing wall 31 are also sealed and extended out of the iron cup 13, and epoxy resin glue is also filled between the upper part of the shell 1 and the upper part of the iron cup 13, the arc extinguishing cover 30 and the upper part of the arc extinguishing wall 31 to improve the protection level of the contactor product.

[0052] Finally, the suffixes "A", "B", etc. in the component names in the specification of this utility model patent (such as conversion terminal A, conversion terminal B, etc.) are only for the convenience of description and are not used to limit the scope of implementation of this utility model patent.

[0053] In summary, the high-voltage DC contactor with connector lead-out in the present invention has a simple, reasonable, novel structure and is easy to produce and implement, thereby reducing production costs and improving production efficiency, product quality and yield.

[0054] In the above description, many specific details are set forth in order to fully understand the present invention. However, the above description is only a preferred embodiment of the present invention. The present invention can be implemented in many other ways different from those described herein, so the present invention is not limited by the specific implementation disclosed above. At the same time, any person skilled in the art can use the above-disclosed methods and technical contents to make many possible changes and modifications to the technical solution of the present invention without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of protection of the technical solution of the present invention.

Claims

1. A high-voltage DC contactor with a connector lead-out form, comprising a housing (1), an end cover (2) sealed to an opening side of the housing (1), and an arc extinguishing hood (3), a guide plate (4), and a coil assembly (5) all arranged in an inner cavity of the housing (1); characterized in that: The coil assembly (5) is provided with a frame (51) for winding the coil and a coil terminal (52) provided on the frame (51) and electrically connected to the coil; the end cover (2) is provided with a coil lead-out terminal (60) for connecting to an external device A; the arc extinguishing cover (3) is provided with a control circuit board (70) for controlling the operation of the coil, and a conversion terminal A (71) and a conversion terminal B (72) respectively electrically connected to the control circuit board (70); the conversion terminal A (71) is also snap-connected to the coil terminal (52), and the conversion terminal B (72) is also welded and fixed to the coil lead-out terminal (60).

2. The high-voltage DC contactor with a connector lead-out form according to claim 1, characterized in that: The opening side of the housing (1) is defined as the upper side, and the arc extinguishing cover (3), the guide plate (4) and the frame (51) are arranged in sequence from top to bottom.

3. The high-voltage DC contactor with a connector lead-out form according to claim 2, characterized in that: A mounting block (53) is integrally provided on the top side of the skeleton (51), and the coil terminal (52) is partially embedded in the mounting block (53); in addition, a clamping block portion (520) is formed on the portion of the coil terminal (52) exposed outside the mounting block (53) for clamping and matching with the conversion terminal A (71).

4. The high-voltage DC contactor with a connector lead-out form according to claim 3, characterized in that: The skeleton (51) adopts an I-wheel structure; The skeleton (51), the mounting block (53) and the coil terminal (52) are fixedly connected into one piece through an injection molding process; or, the skeleton (51) and the mounting block (53) are integrally injection molded, and the coil terminal (52) is partially press-fitted into the mounting block (53).

5. The high-voltage DC contactor with a connector lead-out form according to claim 3, characterized in that: The arc extinguishing cover (3) is provided with an arc extinguishing cover body (30) and an arc extinguishing wall body (31) fixedly connected to the lower side of the arc extinguishing cover body (30); The control circuit board (70) is fixedly arranged on the top side of the arc extinguishing cover (30), the conversion terminal A (71) and the conversion terminal B (72) are both arranged in the vertical direction, and at the same time, the upper end of the conversion terminal A (71) is welded and fixedly connected to the control circuit board (70), the lower end of the conversion terminal A (71) is extended and placed in the space surrounded by the arc extinguishing cover (30) and the arc extinguishing wall (31), the lower end of the conversion terminal B (72) is welded and fixedly connected to the control circuit board (70), and the upper end of the conversion terminal B (72) is welded and fixedly connected to the coil lead terminal (60).

6. The high-voltage DC contactor with a connector lead-out form according to claim 5, characterized in that: A clamping slot (710) for clamping and cooperating with the clamping block portion (520) is integrally provided on the lower end of the conversion terminal A (71).

7. The high-voltage DC contactor with a connector lead-out form according to claim 6, characterized in that: The arc extinguishing cover (30) is provided with a mounting hole for mounting the static contact (9); The clamping slot (710) is a U-shaped slot structure with an opening facing downward, and a guiding inclined surface (711) is formed on the inner wall of the opening of the clamping slot (710).

8. The high-voltage DC contactor with a connector lead-out form according to claim 5, characterized in that: The end cover (2) is also provided with an auxiliary switch lead-out terminal (61) for connecting to an external device B; The high-voltage DC contactor is further provided with an auxiliary switch assembly (8), wherein the auxiliary switch assembly (8) is provided with a micro switch (80) and a transfer terminal (81) electrically connected to the micro switch (80), wherein the micro switch (80) is arranged on the guide plate (4), and the transfer terminal (81) passes through the arc extinguishing cover (3) and is welded and fixedly connected to the auxiliary switch lead terminal (61).

9. The high-voltage DC contactor with a connector lead-out form according to claim 8, characterized in that: The coil lead-out terminal (60) and the auxiliary switch lead-out terminal (61) are both fixedly connected to the end cover (2) through an injection molding process or a press-fitting process.

10. The high-voltage DC contactor with a connector lead-out form according to claim 8, characterized in that: The guide plate (4) is provided with a plate body (40) fixedly arranged on the lower side of the arc extinguishing wall (31), a receiving block (41) integrally arranged on one side of the plate body (40) and for fixing the micro switch (80), and a avoiding portion (42) recessed on the other side of the plate body (40) and used to avoid the mounting block (53); The arc extinguishing cover (30) is also provided with a through hole A (32) for the transfer terminal (81) to pass through.

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