A connection terminal and a three-phase post PCB terminal structure

Abstract

The utility model discloses a kind of connecting terminal and three-phase terminal post PCB terminal structure, belong to new energy automobile electrical connection technical field. Including the terminal base of being provided with several terminal solder leg, terminal base is provided with the terminal room for inserting embedded terminal post end part, several corner pieces that are bent from terminal room end part opening direction terminal room inner wall, several corner pieces are arranged in the form of circular array along the center axis of terminal room;Corner piece includes spring piece one, spring piece two and spring piece three that are bent to terminal room inner wall in sequence along its extension direction, spring piece one, spring piece two and spring piece three are smoothly connected, and spring piece one can elastically support spring piece two adhere to the surface of terminal post inserted in terminal room. The utility model of a kind of connecting terminal and three-phase terminal post PCB terminal structure, to improve the stability, safety and assembly efficiency of three-phase circuit connection in controller.

Description

Technical Field

[0001] This utility model belongs to the field of electrical connection technology for new energy vehicles, specifically relating to a connection terminal and a three-phase terminal block PCB terminal structure. Background Technology

[0002] In the field of electric compressor controllers for new energy vehicles, the transfer of electrical energy between the circuit board and the three-phase terminals on the compressor often relies on busbars. As a core conductive connector, the busbar needs to play a crucial role in the stable transmission of large currents.

[0003] However, existing busbars have significant technical drawbacks: on the one hand, their complex structural design requires multiple auxiliary fasteners and insulating components, resulting in redundant parts. This not only increases the overall assembly weight and cost but also makes them prone to installation errors due to misalignment of multiple parts. On the other hand, because the spacing between the three-phase terminals and the interface specifications of different compressor models vary, different busbar structures need to be designed specifically for them. This leads to frequent mold changes and complex process adjustments during production, making it difficult to achieve standardized mass production. This further restricts the improvement of the overall assembly efficiency of the controller and fails to meet the new energy vehicle industry's demand for high adaptability and high production efficiency of parts.

[0004] Therefore, there is an urgent need for a connection terminal and three-phase terminal block PCB terminal structure that can reduce the number of parts, simplify the assembly process, and significantly improve assembly efficiency. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a connection terminal and three-phase terminal block PCB terminal structure to improve the stability, safety and assembly efficiency of the three-phase circuit connection in the controller.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a connection terminal, including a terminal base with a plurality of terminal solder feet, wherein the terminal base is provided with a wiring chamber for inserting into the end of a terminal post, and a plurality of corner pieces that bend from the end opening of the wiring chamber toward the inner wall of the wiring chamber, and the plurality of corner pieces are arranged in a circumferential array along the central axis of the wiring chamber. The corner piece includes, along its extension direction, spring piece one, spring piece two, and spring piece three, which are bent toward the inner wall of the wiring chamber in sequence. Spring piece one, spring piece two, and spring piece three are smoothly connected, and spring piece one can elastically support spring piece two to fit against the surface of the terminal inserted into the wiring chamber.

[0007] Optionally, the terminal base includes a first segment, a second segment, a third segment, and a fourth segment that are continuously bent. The end of the fourth segment overlaps with the beginning of the first segment, and a locking hole is provided on the side wall of the first segment. The end of the fourth segment is provided with a clamp that can be fastened to the locking hole.

[0008] Optionally, the terminal base may have anti-reverse connection pin one and anti-reverse connection pin two on the side where the terminal solder feet are located.

[0009] Optionally, the terminal base may have several support feet on one side where the terminal solder feet are located.

[0010] Optionally, the terminal base, the corner piece, the terminal solder foot, the anti-reverse connection foot one, the anti-reverse connection foot two, the clamp, and the support foot are integrally formed.

[0011] A three-phase terminal block PCB structure is implemented using the connection terminals described in any of the preceding claims, comprising a circuit board and three connection terminals electrically connected to the circuit board, wherein the positions of the three connection terminals on the circuit board correspond one-to-one with the positions of the three-phase terminals.

[0012] Optionally, the terminal solder feet on the connection terminal are through-hole pins, which can pass through through holes provided on the circuit board and be soldered to the back of the circuit board; The back of the circuit board is tightly attached to a pressure plate that surrounds the outer periphery of the terminal solder feet. The pressure plate is hollow and has a cavity inside that communicates with the back of the circuit board. The cavity can be filled with epoxy resin.

[0013] Optionally, it also includes an insulating protective sleeve that can be fitted around the outer periphery of the connecting terminal. The insulating protective sleeve is integrally formed and has a contoured groove that can match the three connecting terminals respectively. The bottom of the contoured groove has a through hole for inserting the terminal into the wiring chamber.

[0014] Compared with the prior art, the beneficial effects achieved by this utility model are as follows: (1) By setting a terminal base with a wiring chamber and setting a corner piece bent towards the inner wall of the wiring chamber on the terminal base, the corner piece can accurately position the inserted terminal in conjunction with the wiring chamber, avoiding insertion misalignment. The corner piece is divided into three smoothly connected segments, which can enhance the contact stability between the corner piece and the terminal through the multi-segment elastic structure, reduce the contact resistance to ensure reliable electrical connection, and at the same time can be adapted to terminals of different diameters, improving the versatility of the connection terminal; (2) The overall structure of the connecting terminal is integrally formed. Compared with the complex structure of the busbar, the connecting terminal in this technical solution can not only reduce the error and hidden danger in the assembly process of the connecting terminal from the root, but also significantly improve the structural strength, connection reliability and production efficiency of the connecting terminal. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a schematic diagram of the connection terminal in a preferred embodiment of the present invention; Figure 2 This is a lower view of the connecting terminal structure in a preferred embodiment of the present invention; Figure 3 This is a preferred embodiment of the present invention. Figure 2 A schematic cross-sectional view at point AA; Figure 4 This is a front view of the connection terminal structure in a preferred embodiment of the present invention; Figure 5 This is a preferred embodiment of the present invention. Figure 4 Cross-sectional structural diagram at BB; Figure 6 This is a schematic diagram of the three-phase terminal block PCB structure in a preferred embodiment of the present invention; Figure 7 This is a cross-sectional view of the preferred embodiment of the present invention when the three-phase terminals and the three-phase terminal PCB terminal structure are plugged in. Figure 8 This is an exploded structural diagram of the three-phase terminal block PCB terminal structure in a preferred embodiment of this utility model; Among them, 1. Terminal base; 11. Wiring chamber; 101. First section; 102. Second section; 103. Third section; 104. Fourth section; 105. Locking hole; 106. Clamp; 107. Terminal welding foot; 108. Anti-reverse connection foot one; 109. Anti-reverse connection foot two; 1010. Support foot; 2. Corner piece; 201. Spring piece one; 202. Spring piece two; 203. Spring piece three; 3. Circuit board; 301. Through hole; 4. Pressure plate; 401. Cavity; 5. Insulating protective sleeve; 501. Contouring groove; 502. Through hole. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams, which are only used to illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0018] It should be noted that if directional indicators (such as up, down, bottom, top, etc.) are involved in this embodiment, these directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" and "second" may explicitly or implicitly include one or more of that feature. Unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances. Example 1

[0019] like Figures 1-8 As shown, a connection terminal includes a terminal base 1 with a plurality of terminal solder feet 107. The terminal solder feet 107 on the terminal base 1 can be electrically connected to a circuit board 3 by various methods such as welding, crimping, and riveting. The terminal base 1 is provided with a wiring chamber 11 for inserting and embedding the end of a terminal post, and a plurality of corner pieces 2 that bend from the end opening of the wiring chamber 11 toward the inner wall of the wiring chamber 11. The corner pieces 2 are arranged in a circumferential array along the central axis of the wiring chamber 11. Therefore, the corner pieces 2 can form a non-closed polygonal structure within the wiring chamber 11. Based on its own material, the corner pieces 2 have good toughness, conductivity, and deformation recovery ability. When the terminal post is inserted into the wiring chamber 11, the terminal post can be placed so that the corner pieces 2 forming the polygonal structure can abut against the surface of the terminal post, thereby ensuring the transfer of electrical energy between the terminal base 1 and the terminal post.

[0020] It is important to note that, such as Figure 1 , Figure 3As shown, the polygonal structure formed by several corner pieces 2 presents an overall trumpet shape, and the opening of the "trumpet" of this polygonal structure is larger than the diameter of the terminal block to facilitate the insertion of the terminal block into the terminal chamber 11. Based on this shape, the corner pieces 2 may include spring pieces 1 201, 202, and 3 203 bent sequentially toward the inner wall of the terminal chamber 11 along their extension direction. The spring pieces 1 201, 202, and 3 203 are smoothly connected to facilitate a smoother insertion of the terminal block into the terminal chamber 11. During the insertion of the terminal block into the terminal chamber 11, the terminal block will spread the spring pieces 202 on several corner pieces 2 outwards. The spring pieces 1 201 can elastically support the spring pieces 202 to fit against the surface of the terminal block inserted into the terminal chamber 11, thereby ensuring that the spring pieces 202 can stably abut against the surface of the terminal block. The end of spring contact 203 bends towards the inner wall of the wiring chamber 11, thus moving away from the surface of the terminal block. The smooth connection between spring contact 202 and spring contact 203 prevents deep scratches from being left on the terminal block surface, ensuring a tight contact between spring contact 202 and the terminal block surface. Compared to traditional busbars, the connection terminals in this technical solution have a relatively simple structure and component composition. Furthermore, based on the connection method between the terminal block and the connection terminal, the connection terminals in this technical solution can adapt to different types of terminal blocks within a certain range, exhibiting high compatibility.

[0021] In this embodiment, preferably, the terminal base 1 can be configured as a rectangle, specifically as follows: Figure 5 As shown, the terminal base 1 includes a first segment 101, a second segment 102, a third segment 103, and a fourth segment 104 that are continuously bent. The end of the fourth segment 104 overlaps the beginning of the first segment 101, and a locking hole 105 is provided on the side wall of the first segment 101. The end of the fourth segment 104 is provided with a clamp 106 that can be fastened to the locking hole 105, thereby ensuring the stability of the connection between the ends and the stability of the terminal block when it is inserted into the terminal housing 11. Compared with welding and other methods, the structure of the connection terminal is stabilized by fastening the clamp 106 to the locking hole 105, which simplifies the process of manufacturing the connection terminal and facilitates the standardized production of the connection terminal.

[0022] Furthermore, such as Figure 1 As shown, the terminal base 1 has anti-reverse connection pin 108 and anti-reverse connection pin 2 109 on one side of the terminal solder pad 107. It should be noted that anti-reverse connection pin 108 and anti-reverse connection pin 2 109 have different shape characteristics. For example, the width of anti-reverse connection pin 108 is smaller than the width of anti-reverse connection pin 2 109, or the width of anti-reverse connection pin 108 is larger than the width of anti-reverse connection pin 2 109, etc., and can match the size holes on the circuit board 3 for mounting the connection terminals, thereby ensuring the uniqueness of the position of the connection terminal on the circuit board 3.

[0023] Furthermore, such as Figure 1 As shown, the terminal base 1 has several support feet 1010 on one side where the terminal solder feet 107 are provided. The support feet 1010 can provide stable support for the position of the terminal base 1 during the process of soldering the terminal solder feet 107 onto the circuit board 3, and can control the depth of the terminal solder feet 107 inserted into the circuit board 3, thus ensuring the reliability of the connection between the terminal and the circuit board 3 from multiple dimensions.

[0024] In this embodiment, the terminal base 1, corner piece 2, terminal solder foot 107, anti-reverse connection foot one 108, anti-reverse connection foot two 109, clamp 106, and support foot 1010 are integrally formed. This reduces errors and potential problems in the connection terminal assembly process from the source, while significantly improving the structural strength, connection reliability, and production efficiency of the connection terminal. Example 2

[0025] like Figures 1-8 As shown, a three-phase terminal block PCB terminal structure is implemented using any of the aforementioned connection terminals. It includes a circuit board 3 and three connection terminals electrically connected to the circuit board 3. The positions of the three connection terminals on the circuit board 3 correspond one-to-one with the positions of the three-phase terminals. That is, when the three terminals on the three-phase terminals are plugged into the three connection terminals on the circuit board 3, the three-phase terminals can be electrically connected to the circuit board 3. The operation is simple and easy to assemble.

[0026] In this embodiment, preferably, the terminal solder feet 107 on the connecting terminals are through-hole pins. The terminal solder feet 107 can pass through the through holes 301 provided on the circuit board 3 and be soldered to the back of the circuit board 3. A pressure plate 4 is tightly attached to the back of the circuit board 3, surrounding the terminal solder feet 107. It should be noted that when the circuit board 3 is installed inside the controller housing, the pressure plate 4 can be fixed to the back of the circuit board 3 by bolts. That is, the bolts can pass through the pressure plate 4 and the circuit board 3 and be threaded to the controller housing or other internal structures to achieve a tight fit between the pressure plate 4 and the back of the circuit board 3. The pressure plate 4 is hollow, and the inner side of the pressure plate 4 is provided with a cavity 401 communicating with the back of the circuit board 3. The cavity 401 can be filled with epoxy resin to ensure the sealing and insulation of the terminal solder feet 107 on the back of the circuit board 3.

[0027] Furthermore, such as Figures 6-8As shown, the three-phase terminal block PCB structure also includes an insulating protective sleeve 5 that can be fitted around the outer periphery of the connecting terminals. The insulating protective sleeve 5 is made of insulating materials, such as rubber, silicone, or plastic, and can be integrally molded using existing injection molding technology. It is important to note that the insulating protective sleeve 5 has contoured grooves 501 that can respectively match the three connecting terminals. The three contoured grooves 501 are not interconnected, and each contoured groove 501 has a through hole 502 at its bottom for the terminal block to be inserted into the terminal housing 11. Therefore, by setting the insulating protective sleeve 5, short circuits between the three connecting terminals due to adverse external factors are prevented. It is also important to note that when the insulating protective sleeve 5 is made of materials with good flexibility and excellent deformation recovery, such as rubber or silicone, the size of the contoured grooves 501 can be proportionally reduced according to the size of the connecting terminals, so that the insulating protective sleeve 5 can be prevented from falling off the connecting terminals after being fitted onto them.

[0028] Working principle: By setting a terminal base 1 with a wiring chamber 11, and setting a corner piece 2 bent towards the inner wall of the wiring chamber 11 on the terminal base 1, the corner piece 2 can accurately position the inserted terminal in conjunction with the wiring chamber 11, avoiding insertion misalignment. The corner piece 2 is divided into three smoothly connected segments, which can enhance the contact stability between the corner piece 2 and the terminal through a multi-segment elastic structure, reduce contact resistance to ensure reliable electrical connection, and at the same time, can be adapted to terminals of different diameters, improving the versatility of the connection terminal.

[0029] Furthermore, the overall structure of the connecting terminal is integrally formed. Compared with the complex structure of the busbar, the connecting terminal in this technical solution can not only reduce the errors and hidden dangers in the assembly process of the connecting terminal from the source, but also significantly improve the structural strength, connection reliability and production efficiency of the connecting terminal.

[0030] Based on the preferred embodiments of this utility model described above, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A connecting terminal, characterized in that: The terminal base (1) includes a terminal base (1) with a plurality of terminal solder feet (107). The terminal base (1) is provided with a terminal chamber (11) for inserting into the end of the terminal post and a plurality of corner pieces (2) that bend from the end opening of the terminal chamber (11) toward the inner wall of the terminal chamber (11). The plurality of corner pieces (2) are arranged in a circular array along the central axis of the terminal chamber (11). The corner piece (2) includes, along its extension direction, spring piece one (201), spring piece two (202) and spring piece three (203) bent toward the inner wall of the wiring chamber (11) in sequence. Spring piece one (201), spring piece two (202) and spring piece three (203) are smoothly connected, and spring piece one (201) can elastically support spring piece two (202) to fit against the surface of the terminal inserted into the wiring chamber (11).

2. The connection terminal according to claim 1, characterized in that: The terminal base (1) includes a first section (101), a second section (102), a third section (103), and a fourth section (104) that are continuously bent. The end of the fourth section (104) overlaps the beginning of the first section (101), and a locking hole (105) is provided on the side wall of the first section (101). The end of the fourth section (104) is provided with a clamp (106) that can be fastened to the locking hole (105).

3. The connecting terminal according to claim 2, characterized in that: The terminal base (1) is provided with anti-reverse connection pin one (108) and anti-reverse connection pin two (109) on one side of the terminal solder foot (107).

4. The connecting terminal according to claim 3, characterized in that: The terminal base (1) has several support feet (1010) on one side where the terminal solder foot (107) is located.

5. The connection terminal according to claim 4, characterized in that: The terminal base (1), the corner piece (2), the terminal welding foot (107), the anti-reverse connection foot one (108), the anti-reverse connection foot two (109), the clamp (106), and the support foot (1010) are integrally formed.

6. A three-phase terminal block PCB structure, implemented using the connection terminals described in any one of claims 1-5, characterized in that: It includes a circuit board (3) and three connection terminals electrically connected to the circuit board (3), the positions of the three connection terminals on the circuit board (3) corresponding one by one to the positions of the three-phase terminals.

7. The three-phase terminal block PCB terminal structure according to claim 6, characterized in that: The terminal solder pads (107) on the connection terminal are through-hole pins. The terminal solder pads (107) can pass through the through holes (301) provided on the circuit board (3) and be soldered to the back of the circuit board (3). The back of the circuit board (3) is tightly attached to a pressure plate (4) that can surround the outer periphery of the terminal solder foot (107). The pressure plate (4) is hollow, and the inner side of the pressure plate (4) is provided with a cavity (401) that communicates with the back of the circuit board (3). The cavity (401) can be filled with epoxy resin.

8. The three-phase terminal block PCB terminal structure according to claim 6, characterized in that: It also includes an insulating protective sleeve (5) that can be fitted around the outer periphery of the connecting terminal. The insulating protective sleeve (5) is integrally formed and has a contoured groove (501) that can match the three connecting terminals respectively. The bottom of the contoured groove (501) has a through hole (502) for inserting the terminal into the wiring chamber (11).

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