A copper-aluminum combined pin terminal

Abstract

The utility model discloses a copper -aluminium combination contact pin terminal belongs to contact pin terminal technical field, including copper needle and aluminium plate, the welding connection between copper needle and aluminium plate, be equipped with the stepped surface between copper needle and aluminium plate, through the design of stepped surface, make injection -moulded part and wrap aluminium plate are connected in the stepped surface, can ensure that the firmness of contact pin terminal installation in the charging gun, avoid after bearing larger impact force, appear loose or fall off, further avoid the charging gun internal circuit, appear the phenomenon of open circuit, even short -circuit, reduce the potential safety hazard.

Description

Technical Field

[0001] This utility model relates to the field of pin terminal technology, and in particular to a copper-aluminum combined pin terminal. Background Technology

[0002] With the rapid development of new energy sources, the demand for pin terminals used for electrical or signal connections is also increasing.

[0003] For example, a charging gun used for charging new energy vehicles connects to the charging port by inserting the pin terminals inside the charging gun with the socket terminals inside the vehicle's charging port.

[0004] In such cases, when users insert the charging gun into the car's charging port, they often do not align it perfectly and it is inserted at an angle. When the pin contacts the socket, the pin is subjected to an impact force. In addition, after charging is completed, some users may throw the charging gun heavily on the ground, which will also cause a large impact force.

[0005] Over time, the pin terminals inside the existing charging guns will easily become loose, leading to open circuits or even short circuits in the internal circuitry of the charging gun, thus posing a safety hazard. Furthermore, given the large quantity of pin terminals used, reducing manufacturing costs is also an important direction for the development of pin terminals. Utility Model Content

[0006] The purpose of this invention is to solve the technical problems of existing charging guns where the pin terminals are prone to shaking and how to reduce manufacturing costs due to the large number of pin terminals used. Therefore, a copper-aluminum combined pin terminal is proposed.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A copper-aluminum composite pin terminal includes a copper pin and an aluminum plate, which are welded together; a stepped surface is provided between the copper pin and the aluminum plate.

[0009] Preferably, the aluminum plate is in sheet form.

[0010] Preferably, one end of the copper needle is provided with a first connecting part, and the side wall of the aluminum plate is provided with a second connecting part; the first connecting part and the second connecting part are welded together.

[0011] Preferably, both the first connecting part and the first connecting part are cylinders.

[0012] Preferably, the welded connection is a friction weld.

[0013] Preferably, the stepped surface is located between the first connecting portion and the first connecting portion.

[0014] Preferably, the copper needle has a groove at one end near the first connecting part.

[0015] Preferably, the end of the copper needle away from the aluminum plate has a groove.

[0016] Preferably, a retaining strip is provided in the groove.

[0017] Preferably, the end of the copper needle away from the aluminum plate is chamfered.

[0018] Compared with the prior art, this utility model provides a copper-aluminum combined pin terminal, which has the following beneficial effects:

[0019] 1. The copper-aluminum combined pin terminal, through the stepped surface design, allows the injection molded part to be snapped onto the stepped surface and wrapped with an aluminum plate, which can ensure the firmness of the pin terminal installed in the charging gun, and prevent it from loosening or falling off after being subjected to a large impact force. This avoids the phenomenon of open circuit or even short circuit in the internal circuit of the charging gun, reducing safety hazards.

[0020] 2. This copper-aluminum combined pin terminal is designed with aluminum plates and copper pins separately, and then combined by friction welding. This allows some components to be replaced with aluminum, which can reduce manufacturing costs. Also, since the copper pins and aluminum plates can be processed separately and then welded together, the processing difficulty is reduced, which indirectly reduces manufacturing costs. At the same time, since aluminum has a lower density than copper, the pin terminal also has the effect of reducing weight. Attached Figure Description

[0021] Figure 1 This utility model provides a schematic diagram of the structure of a copper-aluminum combined pin terminal. Figure 1 ;

[0022] Figure 2 This utility model provides a schematic diagram of the structure of a copper-aluminum combined pin terminal. Figure 2 ;

[0023] Figure 3 This is a cross-sectional view of a copper-aluminum combined pin terminal proposed in this utility model;

[0024] Figure 4 This utility model proposes a copper-aluminum combined pin terminal. Figure 3 Enlarged view of section A.

[0025] In the figure: 1. Copper needle; 101. First connecting part; 102. Groove; 103. Locking strip; 104. Locking slot; 2. Aluminum plate; 201. Second connecting part; 3. Stepped surface; 4. Welding area; 5. Chamfer. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0027] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying 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.

[0028] Example:

[0029] like Figures 1-4 A copper-aluminum combined pin terminal includes a copper pin 1 and an aluminum plate 2. The copper pin 1 is made of copper and the aluminum plate 2 is made of aluminum. The copper pin 1 and the aluminum plate 2 are welded together by friction welding. A stepped surface 3 is provided between the copper pin 1 and the aluminum plate 2. An injection molded part is snapped onto the stepped surface 3. At the same time, the injection molded part wraps around the aluminum plate 2.

[0030] The aluminum plate 2 is a sheet-like design. The connecting lines inside the charging gun are fixed to the aluminum plate 2 by ultrasonic welding to prevent them from loosening or falling off after being subjected to a large impact.

[0031] The stepped surface 3 design allows the injection molded part to be snapped onto the stepped surface 3 and wrapped with the aluminum plate 2, which ensures the firmness of the pin terminal installed in the charging gun and prevents it from loosening or falling off after being subjected to a large impact. This also prevents the internal circuit of the charging gun from having an open circuit or even a short circuit, reducing safety hazards.

[0032] Furthermore, by designing the aluminum plate 2 and copper pin 1 separately and then combining them by friction welding, the material of some components can be replaced from copper to aluminum, which can reduce manufacturing costs. Also, since the copper pin 1 and aluminum plate 2 can be processed separately and then welded together, the processing difficulty is reduced, which indirectly reduces manufacturing costs. At the same time, since aluminum has a lower density than copper, the pin terminal also has the effect of reducing weight.

[0033] like Figure 2 and Figure 3One end of the copper needle 1 is provided with a first connecting part 101, and the side wall of the aluminum plate 2 is provided with a second connecting part 201.

[0034] The copper needle 1 and the first connecting part 101 are integrally formed and made of the same material.

[0035] The aluminum plate 2 and the second connecting part 201 are integrally formed and are made of the same material.

[0036] The first connecting part 101 and the first connecting part 101 are welded together, such as Figure 3 The welding location is welding area 4.

[0037] Furthermore, both the first connecting part 101 and the first connecting part 101 are cylinders.

[0038] The design of the first connecting part 101 facilitates friction welding.

[0039] The stepped surface 3 is located between the first connecting part 101 and the first connecting part 101.

[0040] The injection-molded part encases the aluminum plate 2, the second connecting part 201, and the first connecting part 101 to improve stability and prevent shaking.

[0041] The copper needle 1 has a slot 104 at one end near the first connecting part 101. A sealing ring made of rubber is fitted inside the slot 104 to seal and prevent external moisture and dust from entering the charging gun.

[0042] The injection-molded part also encloses the sealing ring.

[0043] like Figure 4 The copper pin 1 has a groove 102 at the end away from the aluminum plate 2. The groove 102 is used to fix the insulating cap. The insulating cap is made of rubber and is used in some special occasions to prevent electric arc when the pin terminal is plugged into the socket terminal while it is energized.

[0044] The groove 102 is provided with a retaining strip 103, and the insulating cap is also matched with a retaining groove. The two are engaged together to prevent the insulating cap from accidentally falling off.

[0045] During the process of fixing the insulating cap into the groove 102, glue is also applied to the insulating cap or the groove 102.

[0046] The end of the copper pin 1 away from the aluminum plate 2 is chamfered 5 to facilitate the insertion of the pin terminal into the socket terminal.

[0047] When inserting, the copper pin 1 is inserted into the matching socket terminal on the side away from the aluminum plate 2, that is, the side closer to the chamfer 5.

[0048] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A copper-aluminum composite pin terminal, comprising a copper pin (1) and an aluminum plate (2), characterized in that, The copper needle (1) and the aluminum plate (2) are welded together; A stepped surface (3) is provided between the copper needle (1) and the aluminum plate (2).

2. The copper-aluminum combined pin terminal according to claim 1, characterized in that, The aluminum plate (2) is in sheet form.

3. The copper-aluminum combined pin terminal according to claim 1, characterized in that, One end of the copper needle (1) is provided with a first connecting part (101), and the side wall of the aluminum plate (2) is provided with a second connecting part (201). The first connecting part (101) and the first connecting part (101) are welded together.

4. A copper-aluminum combined pin terminal according to claim 3, characterized in that, Both the first connecting part (101) and the first connecting part (101) are cylinders.

5. A copper-aluminum combined pin terminal according to claim 1 or 4, characterized in that, The welding connection is friction welding.

6. A copper-aluminum combined pin terminal according to claim 3, characterized in that, The stepped surface (3) is located between the first connecting part (101) and the first connecting part (101).

7. A copper-aluminum combined pin terminal according to claim 3, characterized in that, The copper needle (1) has a slot (104) at one end near the first connecting part (101).

8. A copper-aluminum composite pin terminal according to claim 1, characterized in that, The copper needle (1) has a groove (102) at the end away from the aluminum plate (2).

9. A copper-aluminum combined pin terminal according to claim 8, characterized in that, The groove (102) is provided with a retaining strip (103).

10. A copper-aluminum composite pin terminal according to claim 1, characterized in that, The copper needle (1) is chamfered (5) at the end away from the aluminum plate (2).

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