A copper-aluminum terminal

Abstract

The utility model discloses a copper aluminum terminal, including the wiring portion and the terminal portion, the wiring portion is used for with the aluminum cable connection, the terminal portion one end is equipped with the terminal connecting body for with the wiring screw connection, and the other end of terminal portion is fixedly connected with the wiring portion, wherein the one end of terminal portion and wiring portion connection is extended to the wiring portion, and the sharp sandwich layer is formed in the wiring portion. The utility model solves the connection problem of the existing aluminum cable and wiring terminal box wiring screw, and the terminal portion of terminal is wrapped the end of aluminum wire, is convenient for with aluminum wire connection, and the terminal portion is connected with the wiring screw, and the reaction between aluminum wire and wiring screw does not occur, and the connection relation is more safe and reliable.

Description

Technical Field

[0001] This utility model relates to the field of electrical cable connector technology, specifically a copper-aluminum terminal. Background Technology

[0002] Terminal blocks are accessories used to achieve electrical connections, and are classified as connectors in industry. With increasing industrial automation and more stringent and precise control requirements, the use of terminal blocks is gradually rising. With the development of the electronics industry, the application range of terminal blocks is expanding, and the types are also increasing. High-current terminal boxes are a special type of terminal block, mainly used for high-current transmission in industrial automation, new energy equipment, and power systems. Their structure includes an insulating base, connecting plates, and a U-shaped support frame, with wires clamped using screws and nuts. Current manufacturing technology typically uses special terminals to clamp cables (cores) and connect them with connecting screws.

[0003] Due to copper's excellent conductivity, copper cables were previously the primary material for cables. However, this technology had two problems: firstly, copper cables were heavy, making installation difficult; and secondly, copper was expensive to produce. To address these issues, aluminum gradually replaced copper as the cable material. Aluminum is lightweight, easier to install and process, enabling product weight reduction, and its cost is significantly lower than copper. However, existing terminal blocks still primarily use copper screws and nuts to hold the wires. If directly connected to aluminum cables, the cables would overheat under high current conditions, causing a reaction between the copper and aluminum. Therefore, a terminal is needed that holds the aluminum cable at one end and connects to the screw at the other. Aluminum terminals are now available, but their drawback is that they are processed by stamping. Aluminum is relatively soft, making it easy to process but prone to deformation, which is detrimental to long-term use. Therefore, there is an urgent need to develop a high-strength, easily manufactured terminal for holding cables. Summary of the Invention

[0004] The purpose of this invention is to provide a copper-aluminum terminal to solve the problems mentioned in the background art.

[0005] The technical solution of this utility model is: a copper-aluminum terminal, including a wiring part and a terminal part. The wiring part is used to connect with an aluminum cable. One end of the terminal part is provided with a terminal connector for connecting with a wiring screw. The other end of the terminal part is fixedly connected to the wiring part. The end of the terminal part connected to the wiring part extends into the wiring part and forms a spike-shaped interlayer in the wiring part.

[0006] Preferably, the spiked sandwich structure includes a wedge-shaped spike and a substrate encased in the spike. The root and terminal of the spike are integrally formed, and the tip of the spike is inserted into the center of the substrate. The spike and the terminal are inlays, and the substrate is a base material. The inlay and the base material are dissimilar metals, and the hardness of the inlay is higher than that of the base material. The two sides of the spike are physically and metallurgically bonded to the substrate.

[0007] As a further preferred embodiment, the thickness of the wiring portion is greater than the thickness of the terminal portion, the upper and lower surfaces of the wiring portion form a base, and the connection between the base and the terminal portion is a sloped transition connection.

[0008] As a further preferred embodiment, the thickness of the wiring portion is greater than the thickness of the terminal portion, the lower surface of the wiring portion is a base, and the connection between the base and the terminal portion is a sloped transition connection; the upper surface of the wiring portion and the terminal portion are flat, wherein the side of the wiring portion closer to the terminal portion is the exposed root of the spike, and the entire surface of the wiring portion away from the terminal portion is a base.

[0009] As a further preferred embodiment, the tip of the spike is located in the base and does not pierce the end of the wiring portion away from the terminal portion.

[0010] As a further preferred embodiment, the substrate is aluminum and the inlay is copper.

[0011] Preferably, the overall shape of the wiring portion includes an open structure and a cylindrical structure, and its longitudinal cross-section along the central axis direction from the wiring portion to the terminal portion is a spike-shaped sandwich structure.

[0012] As a further preferred embodiment, the wiring portion is a sheet body. When the sheet body is flattened, its width is greater than that of the terminal portion. The middle part of the sheet body is aligned with the direction of the terminal portion, and the two sides of the sheet body are bent upward to form a "U"-shaped structure, which is the open structure of the wiring portion.

[0013] As a further preferred embodiment, the wiring portion is a sheet body. When the sheet body is flattened, its width is greater than that of the terminal portion. The middle part of the sheet body is aligned with the direction of the terminal portion. The two sides of the sheet body are bent upward and joined together to form a cylindrical structure.

[0014] Preferably, the structure of the terminal connector includes hole type, fork type, hook type, and insert type.

[0015] Compared with existing technologies, the beneficial effects of this utility model are as follows: This utility model solves the connection problem between existing aluminum cables and terminal screws. The terminal part wraps around the end of the aluminum wire, facilitating connection with the aluminum wire. The connection between the terminal part and the terminal screw prevents any reaction between the aluminum wire and the terminal screw, making the connection safer and more reliable. Furthermore, the spiked sandwich structure in this utility model solves the problem of insufficient strength in aluminum pressure terminals. Additionally, the spikes and the substrate are physically and metallurgically bonded, preventing stress concentration during stamping and reducing the likelihood of cracking. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of Embodiment 1 of the present utility model; Figure 2 This is a front view of Embodiment 1 of the present utility model; Figure 3 This is a left view of Embodiment 1 of the present invention; Figure 4 This is a bottom view of Embodiment 1 of the present utility model; Figure 5 This is a cross-sectional view (AA) of the present invention; Figure 6 This is a schematic diagram of the wiring section in the unfolded state in Embodiment 2 of this utility model; Figure 7 This is a schematic diagram of the wiring part of Embodiment 1 of the present invention, which has a cylindrical structure.

[0017] Figure 8 This is a three-dimensional structural diagram of one side of Embodiment 2 of the present invention.

[0018] Figure 9 This is a three-dimensional structural diagram of the other side of Embodiment 2 of this utility model.

[0019] Figure 10 This is a schematic diagram of the usage state of Embodiment 2 of this utility model.

[0020] Label Explanation: 1: Wiring section; 2: Spiked interlayer; 3: Terminal section; 4: Terminal connector; 5: Spiked body; 6: Sloping transition; 7: Base; 51: Root of the spiked body; 52: Tip of the spiked body; 8: Aluminum cable. Detailed Implementation

[0021] Example 1 like Figure 1-5As shown, a copper-aluminum terminal includes a wiring portion 1 and a terminal portion 3. The wiring portion 1 is used to connect with an aluminum cable. One end of the terminal portion 3 is provided with a terminal connector 4 for connecting with a wiring screw. The other end of the terminal portion 3 is fixedly connected to the wiring portion 1. The end of the terminal portion 3 connected to the wiring portion 1 extends into the wiring portion 1, forming a spike-shaped interlayer 2 inside the wiring portion 1.

[0022] In this embodiment, the spiked interlayer 2 structure includes a wedge-shaped spike 5 and a substrate 7 surrounding the spike 5. The root 51 of the spike and the terminal portion 3 are integrally formed, and the tip 52 of the spike is inserted into the center of the substrate 7. The spike 5 and the terminal portion 3 are inlays, and the substrate 7 is a base material. The inlay and the base material are dissimilar metals, and the hardness of the inlay is higher than that of the base material. The two sides of the spike 5 are physically and metallurgically bonded to the substrate 7. This connection is very tight, and stress is not concentrated during the stamping process of product processing, making it less prone to cracking.

[0023] like Figure 5 As shown, in this embodiment, the thickness of the wiring portion 1 is greater than the thickness of the terminal portion 3, the upper and lower surfaces of the wiring portion 1 are the base 7, and the connection between the base 7 and the terminal portion 3 is a slope transition 6.

[0024] In this embodiment, the tip 52 of the spike is located in the base 7 and does not pierce the end of the wiring portion 1 away from the terminal portion 3. This structure is to prevent the exposed copper at this end from contacting the aluminum cable.

[0025] In this embodiment, the substrate is aluminum and the inlay is copper. The spiked interlayer 2 introduces the inlay into the substrate with wedge-shaped spikes 5, increasing the overall strength of the part and improving the problem of insufficient hardness of the original aluminum material. Moreover, compared with the stacked structure, the stacked structure has stress concentration and is prone to cracking during the stamping process. The spiked interlayer 2 of this utility model effectively solves the above problems.

[0026] In this case, both the upper and lower surfaces of the wiring part 1 are made of aluminum substrate 7, and there is no distinction between the front and back during stamping, which facilitates processing.

[0027] In this embodiment, the overall shape of the wiring portion 1 includes an open structure and a cylindrical structure. Along the central axis direction from the wiring portion 1 to the terminal portion 3, its longitudinal cross-section has a spike-shaped interlayer 2 structure. The open structure and the cylindrical structure are two methods of terminal use.

[0028] In this embodiment, the wiring portion 1 is a sheet. When flattened, the width of the sheet is greater than that of the terminal portion 3. The middle of the sheet is aligned with the direction of the terminal portion 3, and the two sides of the sheet are bent upwards to form a "U"-shaped structure, which is the open structure of the wiring portion 1. In actual operation, the aluminum cable is placed into the opening of the "U"-shaped structure, and the opening is clamped to the aluminum cable with pliers.

[0029] In this embodiment, the connector 1 is a sheet. When flattened, the sheet is wider than the terminal 3. The middle of the sheet is aligned with the terminal 3. The two sides of the sheet are bent upwards and joined together to form a cylindrical structure. In actual operation, this is the nose tip. The aluminum cable is directly inserted into the cylinder, and the cylinder is flattened with pliers to clamp and connect with the aluminum cable.

[0030] In this embodiment, the terminal connector 4 includes hole-type, fork-type, hook-type, and insert-type structures. For example... Figure 1-5 In the middle, the terminal connector 4 is a hole type, and the wiring part 1 is an open structure. For example... Figure 7 In the middle, the terminal connector 4 is a plug-in type, and the wiring part 1 is a cylindrical structure.

[0031] In actual operation, the end of the aluminum cable 8 is inserted into the connector 1 from one side, ensuring that the end of the aluminum cable 8 does not extend beyond the connection point between the connector 1 and the terminal 3. The terminal connector 4 of the terminal 3 is connected to the wiring screw inside the terminal box. In this case, there is an aluminum-aluminum connection between the aluminum cable 8 and the connector, and a copper-copper connection between the terminal 3 and the wiring screw. During operation, there will be no aluminum-copper connection between the aluminum cable 8 and the wiring screw, and no reaction will occur between them even if the temperature rises.

[0032] Example 2 like Figure 6 , 8 As shown in Figure 9, the difference between this embodiment and Embodiment 1 is that the thickness of the wiring portion 1 is greater than the thickness of the terminal portion 3. The lower surface of the wiring portion 1 is the base 7, and the connection between the base 7 and the terminal portion 3 is a sloped transition 6. The upper surface of the wiring portion 1 and the terminal portion 3 are flat. The side of the wiring portion 1 closest to the terminal portion 3 is the exposed root 51 of the spike, and the entire surface of the wiring portion 1 away from the terminal portion 3 is the base 7. In this structure, the sheet of the wiring portion 1 has a front and a back. Typically, during the stamping process, the side of the upper surface of the wiring portion 1 with the exposed root 51 of the spike is used for the outer side of the open structure or cylindrical structure, and the side of the lower surface of the wiring portion 1 with the entire surface of the base 7 is used for the inner side of the open structure or cylindrical structure. This structure shows the front and back of the product. The exposed root 51 of the spike can indicate from the outside of the product that the inner core of the terminal is copper, which can avoid the situation of mixing this utility model with ordinary pure aluminum terminals. Figure 10As shown, during connection, the end of the aluminum cable 8 is inserted into the connector 1 from one side, and the end of the aluminum cable 8 does not extend beyond the connection point between the connector 1 and the terminal 3. The terminal connector 4 of the terminal 3 is connected to the wiring screw inside the terminal box. In this case, the aluminum cable 8 and the connector have an aluminum-aluminum connection, and the terminal 3 and the wiring screw have a copper-copper connection.

[0033] In this embodiment, the overall shape of the connecting part 1 can be an open structure or a cylindrical structure, and the structure of the terminal connector 4 includes hole type, fork type, hook type, and insert type, which are selected and produced according to the actual working conditions.

[0034] In the description of this utility model, it should be understood that the terms "one end", "the other end", "center", "upper surface", "lower surface", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0035] In this utility model, unless otherwise explicitly specified and limited, the term "connection" and other such terms should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part; it can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A copper-aluminum terminal, characterized in that... It includes a wiring part (1) and a terminal part (3). The wiring part (1) is used to connect with aluminum cables. One end of the terminal part (3) is provided with a terminal connector (4) for connecting with a wiring screw. The other end of the terminal part (3) is fixedly connected to the wiring part (1). The end of the terminal part (3) connected to the wiring part (1) extends into the wiring part (1) and forms a spike-shaped interlayer (2) in the wiring part (1).

2. A copper-aluminum terminal according to claim 1, characterized in that... The spiked interlayer (2) structure includes a wedge-shaped spike (5) and a substrate (7) wrapped around the spike (5). The root (51) of the spike and the terminal (3) are an integral structure. The tip (52) of the spike is inserted into the center of the substrate (7). The spike (5) and the terminal (3) are inlays. The substrate (7) is a base material. The inlay and the base material are dissimilar metals. The hardness of the inlay is higher than that of the base material. The two sides of the spike (5) are physically and metallurgically bonded to the substrate (7).

3. A copper-aluminum terminal according to claim 2, characterized in that... The thickness of the wiring part (1) is greater than the thickness of the terminal part (3). The upper and lower surfaces of the wiring part (1) are the base (7), and the connection between the base (7) and the terminal part (3) is a slope transition (6).

4. A copper-aluminum terminal according to claim 2, characterized in that... The thickness of the wiring part (1) is greater than the thickness of the terminal part (3). The lower surface of the wiring part (1) is the base (7), and the connection between the base (7) and the terminal part (3) is a slope transition (6). The upper surface of the wiring part (1) and the terminal part (3) are flat. The side of the wiring part (1) near the terminal part (3) is the root of the exposed spike (51), and the side of the wiring part (1) away from the terminal part (3) is entirely the base (7).

5. A copper-aluminum terminal according to claim 2, 3, or 4, characterized in that... The tip (52) of the spike is located in the base (7) and does not pierce the end of the wiring part (1) away from the terminal part (3).

6. A copper-aluminum terminal according to claim 2, 3, or 4, characterized in that... The substrate is aluminum, and the inlay is copper.

7. A copper-aluminum terminal according to claim 1, characterized in that... The overall shape of the wiring part (1) includes an open structure and a cylindrical structure. Along the central axis direction from the wiring part (1) to the terminal part (3), its longitudinal section has a spike-shaped sandwich (2) structure.

8. A copper-aluminum terminal according to claim 7, characterized in that... The wiring part (1) is a sheet body. When the sheet body is flattened, its width is greater than that of the terminal part (3). The middle part of the sheet body is in the same direction as the terminal part (3). The two sides of the sheet body are bent upward to form a "U" shaped structure, which is the open structure of the wiring part (1).

9. A copper-aluminum terminal according to claim 7, characterized in that... The wiring part (1) is a sheet body. When the sheet body is flattened, its width is greater than that of the terminal part (3). The middle part of the sheet body is in the same direction as the terminal part (3). The two sides of the sheet body are bent upward and connected to form a cylindrical structure.

10. A copper-aluminum terminal according to claim 1, characterized in that... The terminal connector (4) has the following structures: hole type, fork type, hook type, and insert type.

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