High-current-carrying composite terminal

Abstract

The utility model discloses a high current-carrying composite terminal, which belongs to the field of automobile connector terminal structures, and comprises a female terminal, a terminal box body, an elastic sheet in the box body and a crimping area, the terminal box body is a rectangular box body structure, the front end of the terminal box body is provided with a jack used for connecting a male terminal, the rear end of the terminal box body is fixedly connected with the crimping area, and the terminal box body is provided with an elastic sheet in the box body. The crimping area and the terminal box body are formed by integrally bending a metal sheet, a box body inner elastic sheet is arranged in the terminal box body, the box body inner elastic sheet comprises a riveting point, an elastic arm, contacts and an elastic sheet convex hull, the riveting point on the elastic sheet is aligned with the riveting point on the terminal box body, the elastic arm is arranged in the middle of the box body inner elastic sheet, and the elastic arm is provided with two contacts which are spaced front and back. A plurality of riveting points are arranged at the front end of the elastic arm, an elastic piece convex hull is arranged on the rear portion of the elastic arm, and a protruding limiting piece is arranged in the middle of the rear end of the elastic arm. The two sides of the male terminal PIN are provided with the elastic contact points, so that the vibration resistance of connection is improved, and the connection of the terminal is more reliable.

Description

Technical Field

[0001] This application belongs to the field of automotive connector terminal structure and relates to a high current-carrying composite terminal. Background Technology

[0002] Current Situation: In automotive circuit design, appropriate wire diameters and terminals are selected based on the current required by the electrical appliances. Currently, the largest terminal is 9.5mm². However, even the largest terminal cannot meet the demands of high current. Sometimes, it is necessary to use two terminals to share the high current. Increasing the number of terminals directly leads to higher wiring harness costs and fails to meet the current industry demands for lightweight and miniaturized designs. In automotive wiring harnesses, overheating at contact points frequently occurs due to the poor current-carrying capacity of the selected terminals.

[0003] Terminal: A conductor component at the end of a wire harness in a connector. Conductivity between wire harnesses is achieved through terminals. In a pair of connected terminals, one is a male terminal and the other is a female terminal. Terminals are classified into different grades according to size; the larger the terminal, the greater the current it can withstand.

[0004] Wiring harness: A collection of wires connecting an appliance to a power source, with terminals at both ends of the wires. Electrical continuity is achieved by connecting the wires to the terminals on the appliance.

[0005] Laser welding: High-energy laser irradiates the material, causing the material to melt and fuse together instantly, thus achieving the purpose of joining. Utility Model Content

[0006] To address the aforementioned problems, this invention proposes a high current-carrying composite terminal with a high current-carrying capacity.

[0007] The technical problem solved by this utility model is achieved through the following technical solution:

[0008] A high current-carrying composite terminal includes a female terminal comprising a terminal housing, an internal spring contact, and a crimping area. The terminal housing has a rectangular structure. A socket for connecting a male terminal is provided at the front end of the terminal housing. The crimping area is fixedly connected to the rear end of the terminal housing. The crimping area and the terminal housing are integrally formed by bending a metal sheet. An internal spring contact is installed inside the terminal housing.

[0009] The spring inside the housing includes rivets, elastic arms, contacts, and spring protrusions. The rivets on the spring are aligned with the rivets on the terminal box. The elastic arm is located in the middle of the spring inside the housing. The elastic arm has two contacts spaced apart at the front and rear. The front end of the elastic arm has multiple rivets, the rear end of the elastic arm has a spring protrusion, and the rear end of the elastic arm has a protruding limiting piece.

[0010] Furthermore, the terminal box includes laser welding points, steps, and bosses. The left and right ends of the terminal box are used for welding connections. Two laser welding points are provided in the middle of the left end of the terminal box, and steps are provided on the outer side of both laser welding points. A boss that mates with the steps is provided on the right end of the terminal box.

[0011] Furthermore, two process holes are spaced apart at the fold line position on one side of the terminal box.

[0012] Furthermore, a rectangular hole is provided at a corresponding position on the upper surface of the terminal box. When the terminal mates with the hole in the plastic part, the rectangular hole on the terminal box can engage with the hook inside the hole in the plastic part, thus fixing the terminal to the hole in the plastic part. Multiple rivet points are provided at the front end of the rectangular hole, and two support protrusions are provided at intervals behind the rectangular hole. A limit wall is provided at the rear end of the upper surface of the terminal box after bending.

[0013] Furthermore, a protruding step structure is provided in the middle of the port on the lower front end face of the terminal box, which increases the size of the terminal end face.

[0014] Furthermore, a central protrusion is provided on the lower end face of the terminal box, and long strip protrusions are provided on both the left and right sides of the central protrusion.

[0015] Furthermore, the crimping area includes a core crimping wing, an insulation crimping wing, and crimping grooves. When the terminal crimping area is crimped with the copper wire, the core crimping wing is crimped with the conductor portion of the wire, and the insulation crimping wing is crimped with the insulation portion of the wire. Multiple crimping grooves are provided on the core crimping wing to increase the holding force with the conductor.

[0016] Furthermore, the crimping area includes a dedicated crimping groove, a stop claw, a rib, and a rib. The front end of the crimping area is provided with a corresponding dedicated crimping groove. Multiple dedicated crimping grooves are provided inside the crimping groove at the corresponding position of the copper wire crimping. Multiple ribs are provided inside the crimping groove at the position of the wire insulation crimping. A rib is provided at the rear end of the crimping groove.

[0017] The advantages and positive effects of this utility model are:

[0018] This structure has 16 contact points between the internal spring contacts and the male pin, and 3 contact points between the terminal housing and the male pin. The large number of contact points allows the terminal connection to carry a larger current, significantly improving its current-carrying capacity. The male pin has elastic contact points on both sides, increasing the connection's vibration resistance and making the connection more reliable. Attached Figure Description

[0019] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a three-dimensional schematic diagram of the overall structure.

[0021] Figure 2 This is a schematic diagram of the exploded structure of the female terminal.

[0022] Figure 3 This is a schematic diagram of the female terminal box unfolded.

[0023] Figure 4 This is a schematic diagram of the main features of the spring clips inside the box.

[0024] Figure 5 This is a schematic diagram of the main features of the crimping area.

[0025] Figure 6 This is a schematic diagram of the crimping area in another embodiment.

[0026] Figure 7 This is the front view of the female terminal.

[0027] Figure 8 yes Figure 7 A sectional view along line AA.

[0028] Figure 9 yes Figure 8 The left view.

[0029] The markings in the diagram indicate:

[0030] 1. Male terminal; 2. Female terminal;

[0031] 21. Spring clips inside the housing;

[0032] 211. Rivet point; 212. Elastic arm; 213. Contact point; 214. Spring tab; 215. Limiting piece;

[0033] 22. Terminal box; 221. Outer protruding step; 222. Long strip protrusion; 223. Middle protrusion; 224. Laser weld point; 225. Rivet point; 226. Rectangular hole; 227. Support protrusion; 228. Limiting wall; 229. Process hole; 2210. Step; 2211. Boss;

[0034] 23. Crimping area; 231. Core crimping wing; 232. Insulation crimping wing; 2311. Crimping groove; 2312. Special crimping groove; 2313. Claw; 2321. Raised rib; 2322. Raised rib; Detailed Implementation

[0035] To make the structure and advantages of this utility model clearer, the structure of this utility model will be further described below with reference to the accompanying drawings.

[0036] In this embodiment, the vertical direction, horizontal direction, front end, and rear end are all relative position descriptions and do not limit the actual orientation of the product.

[0037] A high current-carrying composite terminal, see attached. Figure 1 As shown, it includes male terminals and female terminals. The male terminal can be inserted into the front socket of the female terminal to make the male terminal and the female terminal connected in a limited manner. This solution mainly describes the female terminal part.

[0038] See appendix Figure 2 As shown, the female terminal includes a terminal housing 22, a spring 22 inside the housing, and a crimping area 23. The terminal housing has a rectangular structure. A socket for connecting the male terminal is provided at the front end of the terminal housing. The crimping area is fixedly connected to the rear end of the terminal housing. The crimping area and the terminal housing are made of metal sheet bent as one piece. A spring is installed inside the terminal housing. The spring can abut against the male terminal and continuously provide preload to prevent the male terminal from coming out.

[0039] See appendix Figure 3 The terminal box shown is an unfolded view. The terminal box includes an outward protruding step 221, a long strip protrusion 222, a middle protrusion 223, a laser welding point 224, a rivet point 225, a rectangular hole 226, a support protrusion 227, a limiting wall 228, a process hole 229, a step 2210, and a boss 2211.

[0040] The left and right ends of the terminal box are used for welding connections. Two laser welding points are set in the middle of the left end of the terminal box, and steps are set on the outer side of the two laser welding points. The right end of the terminal box is provided with a boss that mates with the steps. When the terminal box is encased, a boss at the front and a boss at the back of the box are attached to the corresponding steps, and then laser welding is used to connect them at the laser welding points to complete the forming of the box 22.

[0041] Two process holes are provided at intervals on one side of the terminal box at the fold line position. The process holes 229 on the box 22 make it easier to bend and shape the terminals, and also increase the heat dissipation space of the connection to a certain extent.

[0042] A rectangular hole 226 is provided at a corresponding position on the upper surface of the terminal box 22. When the terminal mates with the hole in the plastic part, the rectangular hole 226 on the terminal box 22 can be hooked with the hook inside the hole in the plastic part to fix the terminal to the hole in the plastic part. Multiple rivet points 225 are provided at the front end of the rectangular hole, and two support protrusions 227 are provided at intervals behind the rectangular hole. A limit wall 228 is provided at the rear end of the upper surface of the terminal box.

[0043] The terminal housing 22 has an outwardly protruding step 221 structure in the middle of the port on the lower front end face, which increases the terminal end face size and facilitates the detection of the terminal by the electrical test probe during wire harness electrical testing.

[0044] A central protrusion is provided on the lower end face of the terminal box, and long strip protrusions are provided on both the left and right sides of the central protrusion to increase the friction of the terminal.

[0045] See appendix Figure 4 As shown, the spring contact 21 inside the housing includes a rivet point 211, an elastic arm 212, a contact point 213, and a spring contact protrusion 214. The rivet point on the spring contact is aligned with the rivet point on the terminal box. The elastic arm is located in the middle of the spring contact inside the housing. The elastic arm has two contacts spaced apart at the front and rear. The front end of the elastic arm has multiple rivet points, and the rear end of the elastic arm has a spring contact protrusion. A protruding limiting piece is located in the middle of the rear end of the elastic arm. The spring contact inside the housing is connected by a riveting process. In this case, the limiting piece at the rear end of the spring contact is restricted by the limiting wall on the terminal box. The riveting process is not limited to the two forms shown in the figure. Laser welding can also be used.

[0046] See appendix Figure 7 , 8 As shown in Figure 9, when the male terminal is inserted into the female terminal, the front and rear contacts on the spring contact sequentially contact the upper surface of the male terminal PIN. At this time, the protrusion on the spring contact abuts against the support protrusion on the housing, and the elastic arm undergoes elastic deformation, causing the spring contact protrusion to move backward on the support protrusion. Simultaneously, the front and rear contacts apply contact force to the upper surface of the male terminal PIN. At the same time, the elongated protrusion and the elastic protrusion on the housing contact the lower surface of the male terminal PIN, completing the contact between the female and male terminals.

[0047] like Figure 5 The crimping area 23 includes a core crimping wing 231, an insulation crimping wing 232, and crimp grooves 2311. When the terminal crimping area 23 is crimped with a copper wire, the core crimping wing is crimped with the conductor portion of the wire, and the insulation crimping wing is crimped with the insulation portion of the wire. Five crimp grooves 2311 are designed on the core crimping wing 231 to increase the holding force with the conductor.

[0048] Example 2

[0049] See appendix Figure 6 The schematic diagram of the crimping area in another embodiment shown differs from that in embodiment 1 in that the crimping area 23 includes a dedicated crimping groove 2312, a stop claw 2313, a rib 2321, and a rib 2322. A corresponding dedicated crimping groove is provided at the front end of the crimping area. Multiple dedicated crimping grooves are provided inside the crimping groove at the corresponding position of the copper wire crimping. Multiple ribs are provided inside the crimping groove at the position of the wire insulation crimping. A rib is provided at the rear end of the crimping groove.

[0050] When crimping aluminum wires, during the crimping process between the terminal crimping area 23 and the aluminum wire, because the aluminum conductor is softer than copper and the oxide film on the surface of the aluminum wire increases the crimping resistance, a closely spaced crimping groove 2311 is designed. During crimping, the aluminum conductor is squeezed into the crimping groove, and the inclined surfaces on both sides of the crimping groove pierce the oxide film on the surface of the aluminum conductor and come into contact with the aluminum inside the conductor. This not only improves the holding force on the aluminum wire but also reduces the connection resistance between the terminal and the wire. The raised ribs on the insulation crimping wings can improve the holding force on the wire insulation.

[0051] The above description is merely an embodiment of this utility model and is not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A high current composite terminal, characterized by, The female terminal includes a terminal box, an inner spring in the box, and a crimping area. The terminal box is a rectangular box structure. A socket for connecting a male terminal is arranged at the front end of the terminal box. The rear end of the terminal box is fixedly connected with the crimping area. The crimping area and the terminal box are integrally bent by a metal sheet. The inner spring in the box is arranged in the terminal box. The inner spring in the box includes rivet points, elastic arms, contact points, and spring bumps. The rivet points on the spring are aligned with the rivet points on the terminal box. The middle part of the inner spring in the box is the elastic arm. The elastic arm is provided with two front and rear spaced contact points. The front end of the elastic arm is provided with a plurality of rivet points. The rear part of the elastic arm is provided with a spring bump. The rear end of the elastic arm is provided with a protruding limiting sheet.

2. The high current composite terminal of claim 1, wherein, The terminal box includes laser welding points, steps, and bosses. The left and right ends of the terminal box are used for welding connection. The middle part of the left end of the terminal box is provided with two laser welding points. The outer sides of the two laser welding points are provided with steps. The right end of the terminal box is provided with a boss matched with the step.

3. The high current composite terminal of claim 2, wherein, Two process holes are arranged at the position of the folding line on one side of the terminal box.

4. The high current composite terminal of claim 1, wherein, A rectangular hole is arranged at the corresponding position of the upper end face of the terminal box. When the terminal cooperates with the hole of the plastic part, the rectangular hole on the terminal box can be hung with the hook in the hole of the plastic part, so as to fix the terminal and the hole of the plastic part. A plurality of rivet points are arranged at the front end of the rectangular hole. Two support bumps are arranged at the rear of the rectangular hole. A limiting wall is arranged at the rear end of the upper end face of the terminal box.

5. The high current composite terminal of claim 1, wherein, An outer boss step structure is arranged at the middle part of the lower end face of the front end of the terminal box, so as to increase the size of the terminal end face.

6. The high current composite terminal of claim 1, wherein, A middle bump is arranged at the middle part of the lower end face of the terminal box. Long bumps are arranged on the left and right sides of the middle bump.

7. The high current composite terminal of claim 1, wherein, The crimping area includes a wire core crimping wing, an insulating skin crimping wing, and a crimping groove. When the terminal crimping area is crimped with the copper wire, the wire core crimping wing is crimped with the conductor part of the wire, and the insulating skin crimping wing is crimped with the insulating skin part of the wire. A plurality of crimping grooves are arranged on the wire core crimping wing, so as to increase the holding force with the conductor.

8. The high current composite terminal of claim 1, wherein, The crimping area includes special crimping grooves, blocking claws, protruding ribs, and protruding ribs. The front end of the crimping area is provided with corresponding special crimping grooves. The inner side of the crimping groove at the corresponding position of the copper wire crimping is provided with a plurality of special crimping grooves. A plurality of protruding ribs are arranged in the crimping groove at the insulating skin crimping position.

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