A copper-aluminum friction-welded slotted terminal structure for a charging interface

Abstract

This utility model relates to the technical field of copper-aluminum friction-welded slotted terminal structure for charging interfaces, and in particular to a copper-aluminum friction-welded slotted terminal structure for charging interfaces, comprising a tail end assembly, a slotted spring assembly, and a spring; the spring is sleeved on the contact port at the front end of the slotted spring assembly; the tail end of the slotted spring assembly is welded to the tail end assembly as an integral structure through friction welding; the slotted spring assembly includes a welding tube at the tail end and several sets of contact springs distributed along the circumference of the front end of the welding tube; the contact springs are tightened along a straight line from the tail end to the front end; an annular limiting groove is provided on the outer wall of the front end of the contact springs; a spring is installed in the limiting groove. Combined with the innovative application of advanced welding technology, this successfully solves the industry pain points of serious waste of precious metal materials and lengthy process routes in traditional processing, thereby achieving cost reduction and efficiency improvement.

Description

Technical Field

[0001] This utility model relates to the technical field of copper-aluminum friction-welded slotted terminal structure for charging interfaces, and in particular to a copper-aluminum friction-welded slotted terminal structure for charging interfaces. Background Technology

[0002] The existing DC charging terminal for electric vehicles is a one-piece terminal. The terminal needs to be machined as a whole, which consumes a lot of time in the process and has serious material loss. In addition, the main material of the terminal is copper, which has a high cost of raw materials. Utility Model Content

[0003] To overcome the shortcomings of existing technologies, this utility model provides a copper-aluminum friction-welded slotted terminal structure for a charging interface.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a copper-aluminum friction-welded slotted terminal structure for a charging interface, including a tail end assembly, a slotted spring assembly, and a spring; the spring is sleeved on the contact port at the front end of the slotted spring assembly; the tail end of the slotted spring assembly is welded to the tail end assembly by friction welding to form an integral structure; the slotted spring assembly includes a welding tube at the tail end and several sets of contact springs distributed along the circumference of the front end of the welding tube; the contact springs are tightened along the straight direction from the tail end to the front end; an annular limiting groove is provided on the outer wall of the front end of the contact springs; a spring is installed in the limiting groove.

[0005] According to another embodiment of the present invention, the tail end assembly is further comprising an aluminum rod precision-formed using a cold heading process.

[0006] According to another embodiment of the present invention, the tail end assembly is further comprising a spiral tail end or a welded tail end.

[0007] According to another embodiment of the present invention, the spiral tail end is further characterized by a machined thread structure.

[0008] According to another embodiment of the present invention, the welding tail end is further comprising an ultrasonic welding port.

[0009] The beneficial effects of this invention are that the terminal structure optimizes the traditional one-piece machined slotted terminal into two independent components: a slotted spring and a tail aluminum rod. These two components are then welded together using a high-precision friction welding process. Compared to traditional one-piece machining, this new structure not only reduces the cost of high-value raw materials but also significantly reduces processing time by leveraging the solid-state connection advantage unique to friction welding, while ensuring conductivity and mechanical strength. This results in a technological breakthrough that reduces overall cost and increases production efficiency. This modular design, combined with the innovative application of advanced welding technology, successfully addresses industry pain points such as significant waste of precious metal materials and lengthy process routes in traditional machining, thereby achieving cost reduction and efficiency improvement. Attached Figure Description

[0010] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0011] Figure 1 This is a structural schematic diagram of Embodiment 1;

[0012] Figure 2 This is a structural schematic diagram of Embodiment 2;

[0013] Figure 3 This is a cross-sectional view of Embodiment 1;

[0014] Figure 4 This is a cross-sectional view of Embodiment 2.

[0015] In the figure: 1. Tail end assembly; 1-1. Spiral tail end; 1-2. Welded tail end; 2. Grooved spring assembly; 3. Spring spring; 4. Welded tube; 5. Contact spring; 6. Limiting groove. Detailed Implementation

[0016] like Figure 1-2 As shown, a copper-aluminum friction-welded slotted terminal structure for a charging interface is characterized by comprising a tail end assembly 1, a slotted spring assembly 2, and a spring 3; the spring 3 is sleeved on the contact port at the front end of the slotted spring assembly 2; the tail end of the slotted spring assembly 2 is welded to the tail end assembly 1 by friction welding to form an integral structure; the slotted spring assembly 2 includes a welding tube 4 at the tail end and several sets of contact springs 5 ​​distributed along the circumference of the front end of the welding tube 4; the contact springs 5 ​​are tightened along a straight line from the tail end to the front end; an annular limiting groove 6 is provided on the outer wall of the front end of the contact spring 5; the spring 3 is installed in the limiting groove 6.

[0017] According to another embodiment of the present invention, the tail end component 1 is an aluminum rod precision-formed using a cold heading process.

[0018] According to another embodiment of the present invention, the tail end assembly 1 is a spiral tail end 1-1 or a welded tail end 1-2.

[0019] According to another embodiment of the present invention, the spiral tail end 1-1 is further characterized by a machined thread structure.

[0020] According to another embodiment of the present invention, the welding tail end 1-2 is further comprising an ultrasonic welding port.

[0021] Detailed operation process:

[0022] Component fabrication stage: Tail-end component 1 is precision formed into an aluminum rod substrate using a multi-station cold heading machine, and the interface is processed. The spiral tail end 1-1 is formed into a thread structure by CNC turning of the aluminum rod end. The welded tail end 1-2 uses an ultrasonic welding machine to prepare a welding port at the end of the aluminum rod to ensure cable connection compatibility. The slotted spring component 2 is processed, and the welded tube 4 is formed. The front end is processed with several evenly distributed slots using a five-axis linkage CNC milling machine, and a variable diameter structure is formed through a progressive drawing process, with the front end tightened. An annular limiting groove 6 is processed on the outer wall of the contact spring front end. The spring 3 is continuously stamped into a spiral annular structure, and its inner diameter matches the limiting groove 6.

[0023] 2. Friction welding stage: Clean the welding surface of the tail end component 1 and the end of the welding tube 4 of the slotted spring component 2 to remove the surface oxide layer and oil stains. Clamp the tail end component 1 and the slotted spring component 2 in an inertial friction welding machine for welding.

[0024] In Example 1, the spiral tail end 1-1 is selected to be friction welded to the slotted spring assembly 2.

[0025] In Example 2, the welding tail end 1-2 is selected to be friction welded with the slotted spring assembly 2.

[0026] 3. Assembly stage: After the spring 3 is heated, it is quickly inserted into the limiting groove 6 of the contact spring 5 and then cooled naturally.

[0027] The above description is illustrative only and not restrictive of this utility model. Those skilled in the art will understand that many modifications, variations or equivalents can be made without departing from the spirit and scope defined by the appended claims, and all such modifications, variations or equivalents will fall within the protection scope of this utility model.

Claims

1. A charge interface copper-aluminum friction-welded split-slot terminal structure, characterized by, The assembly includes a tail end assembly (1), a slotted spring assembly (2), and a spring (3); the spring (3) is sleeved on the contact port at the front end of the slotted spring assembly (2); the tail end of the slotted spring assembly (2) is welded to the tail end assembly (1) by friction welding to form an integral structure; the slotted spring assembly (2) includes a welding tube (4) at the tail end and several sets of contact springs (5) distributed along the circumference of the front end of the welding tube (4); the contact springs (5) are tightened along the straight direction from the tail end to the front end; the outer wall of the front end of the contact springs (5) is provided with an annular limiting groove (6); the spring (3) is installed in the limiting groove (6).

2. The charge interface copper aluminum friction welded split slot terminal structure of claim 1, wherein, The tail end component (1) is an aluminum rod that is precision formed by cold heading process.

3. The charge interface copper aluminum friction welded split slot terminal structure of claim 1, wherein, The tail end assembly (1) is a spiral tail end (1-1) or a welded tail end (1-2).

4. The charge interface copper aluminum friction welded split slot terminal structure of claim 3, wherein, The spiral tail end (1-1) has a machined thread structure.

5. The charging interface copper-aluminum friction-welded slotted terminal structure according to claim 3, characterized in that, The welding tail end (1-2) is the ultrasonic welding port.

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