Charging seat terminal assembly

Abstract

The utility model discloses a terminal assembly of a charging seat, which relates to the technical field of electric connectors and aims to solve the problem that current bearing capacity is improved while wearing parts are convenient to replace, the terminal assembly comprises a male terminal and a female terminal, the male terminal is in a plate sheet shape, and the cross section of the male terminal is rectangular; the female terminal comprises a clamping plate end and a wire harness connecting end, the clamping plate end is fixedly connected with the wire harness connecting end, the clamping plate end comprises two parallel plates which are arranged in parallel and a connecting plate which is vertically connected with the two parallel plates, the two parallel plates are arranged in a spaced mode and form a socket, and an elastic reed is installed in the socket; and the male terminal can be inserted into the socket along the length direction of the female terminal and is in contact connection with the reed. The plate-shaped design of the male terminal and the clamping plate end design of the female terminal provide a wider contact surface, the current density per unit area is reduced, the current bearing capacity is effectively improved, the reed is utilized to ensure full contact between the male terminal and the female terminal when the male terminal is inserted, tight contact is ensured, and the connection stability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile charging seats, in particular to a charging seat terminal assembly. Background Art

[0002] At present, the energy supply of pure electric vehicles and hybrid electric vehicles mainly relies on external charging facilities, among which the charging seat and its matching charging plug play a vital role, especially the connecting terminal assembly in the charging seat. As the hub of power transmission, its performance is directly related to charging efficiency and safety. Taking the Chinese utility model patent: CN219371520U, a high-power DC charging seat, as an example of the charging seat in the prior art, it discloses its cylindrical connecting terminal, which has a plurality of elastic arms and axial grooves between the elastic arms in the circumferential direction. It is necessary to ensure that each elastic arm can form a stable and elastic close contact with the docking pin, so as to ensure that reliable current conduction can be maintained under higher current loads. Faced with the demand for improving current carrying capacity, traditional methods often focus on expanding the diameter of the connecting terminal to increase the cross-sectional area of ​​the current flow, thereby improving the current passing capacity. However, this approach also brings challenges: as the contact area increases, the friction and resistance between the terminals during the plugging and unplugging process increase significantly, which not only requires the spring clips to have a stronger clamping force to maintain continuous and stable electrical contact, but also makes the spring clips more susceptible to large deformations under repeated plugging and unplugging stress, accelerating fatigue, and ultimately resulting in insufficient contact between the terminals, affecting the normal transmission of current. In addition, maintenance requires replacing the entire terminal to restore normal effects, seriously affecting the use and reliability of the charging station. Summary of the invention

[0003] In order to cope with the challenges faced by charging seat connection terminals in the prior art, especially the problem of improving current carrying capacity while facilitating replacement of consumable parts, the utility model provides a charging seat terminal assembly.

[0004] The technical solution of the utility model comprises a male terminal and a female terminal, the male terminal is in the shape of a plate, and its cross section is rectangular; the female terminal comprises a clamping plate end and a wiring harness connecting end for connecting the wiring harness in the charging seat, the clamping plate end is fixedly connected to the wiring harness connecting end, the clamping plate end comprises two parallel plates arranged in parallel and a connecting plate vertically connecting the two parallel plates, the two parallel plates are arranged at intervals and form a socket, an elastic spring sheet is installed in the socket, and the male terminal can be plugged into the socket along the length direction of the female terminal and contact and connect with the spring sheet.

[0005] By adopting the above technical solution, the plate-shaped design of the male terminal and the clamping end design of the female terminal provide a wider contact surface compared with the traditional circular or other shapes, which helps to reduce the current density per unit area, thereby effectively improving the current carrying capacity. The spring is used to ensure that the male terminal is in full contact with the female terminal when inserted, ensuring close contact and improving the stability of the connection. In addition, the flat-plate male and female terminals have a relatively simple structure, are easy to mass produce and assemble, are easy to inspect and maintain, and reduce manufacturing and maintenance costs.

[0006] In a possible design, the wiring harness connection end includes a clamping column and a connecting tube that are integrally connected. A clamping groove is provided at the end of the clamping column, the clamping plate end is fixedly installed in the clamping groove, and a spring coil is installed in the connecting tube.

[0007] The above design is equivalent to fixing the clamping groove on the outside of the clamping plate end, which not only simplifies the assembly process and reduces additional fixing components, but also ensures a stable connection between the clamping plate end and the wiring harness connection end; and then uses the integrally connected connecting tube and spring coil to provide a path for direct connection to the wiring harness, which facilitates the connection of the wiring harness.

[0008] In a possible design, the socket passes through both sides of the clamping plate end in the width direction.

[0009] The above design allows the male terminal to have a larger alignment range when inserted, and the user can complete the plugging operation more easily. In addition, the heat generated when the current passes through can be dissipated through the wider surface area on both sides of the socket. Compared with the closed or narrow design, this structure is more conducive to air circulation and assists in heat dissipation, which is especially important for high-power charging and helps to maintain the charging station within a safe operating temperature range.

[0010] In a possible design, the spring sheet includes a first sheet, a second sheet and a bent sheet. The first sheet and the second sheet are arranged relative to each other in the height direction, and the bent sheet is connected between the edge positions of the first sheet and the second sheet and encloses a "U"-shaped cross section.

[0011] With the above design, the U-shaped reed can form elastic properties by itself, provide a certain resilience, increase the contact pressure between the male terminal and the reed after insertion, and can also be adaptive to a certain extent, and can adapt to male terminals of different sizes or slight deviations, achieve a close fit through elastic deformation, and improve compatibility and flexibility of use.

[0012] In a possible design, the first sheet and the second sheet each include a plurality of contact spring arms arranged linearly at intervals, and the contact spring arms are in the shape of an "H", including two arm bars and a connecting portion between the two arm bars, the two arm bars are arranged in parallel and are integrally connected through the connecting portion, and the arm bars of the first sheet and the second sheet are close to each other to form an arc-shaped protrusion, and the connecting portion is located at the highest point of the protrusion.

[0013] With the above design, the arc-shaped protrusion design of the arm bar can fit more closely when the male terminal is inserted, and can maintain good contact even under slight relative displacement, which significantly improves the reliability and stability of electrical contact. The contact spring arm can perform moderate elastic deformation according to the specific size and shape of the male terminal to achieve adaptive adjustment. The addition of a connecting portion at the highest point of the protrusion increases the total current transmission area and further improves the overall current carrying capacity. The connecting portion integrates adjacent arm bars to form a more stable overall structure, which provides additional mechanical support for the arm bars and ensures that the contact spring arm maintains good elastic properties.

[0014] In a possible design, elastic supporting cantilevers extend from both sides of the connecting portion along the length direction of the arm bar, and the supporting cantilevers are also inclined and bent toward the corresponding parallel plates.

[0015] With the above design, the supporting cantilever can be supported on the corresponding sheet body and the parallel plate to form an elastic supporting frame, which can provide additional elastic restoring force when the male terminal is inserted, helping the contact spring arm to quickly return to its original position and ensure stable contact between the contact spring arm and the male terminal.

[0016] In a possible design, a plurality of elastic positioning cantilevers are provided on one side edge of the first sheet and the second sheet away from the bending sheet, and the positioning cantilevers are bent out from the corresponding edge positions toward the contact elastic arms.

[0017] With the above design, the elastic positioning cantilever can not only play a good guiding role when the male terminal is inserted, but also provide additional lateral holding force to ensure that the male terminal remains in the preset position. The male terminal and the female terminal can maintain a good connection state, reduce the phenomenon of poor contact, and improve the stability of the charging process.

[0018] In a possible design, guide arms are further provided on the first sheet and the second sheet. The guide arms are arched and both ends thereof are integrally connected to the corresponding sheet. The guide arms are located on both outer sides of the positioning cantilever.

[0019] With the above design, the arched guide arm has a certain degree of rigidity compared to the positioning cantilever, and can provide a clearer guiding path during the insertion of the male terminal. Especially when subjected to the lateral force generated during repeated plugging and unplugging, it can effectively resist twisting and deformation, prevent excessive deflection of the male terminal, and ensure the center alignment of the male terminal.

[0020] In a possible design, a spacing protrusion is convexly provided on the bending sheet body, and the spacing protrusion presses against the inner side surface of the connecting plate to separate the bending sheet and the connecting plate.

[0021] With the above design, the tiny gaps formed by the spacer bumps can promote air circulation, further enhance the heat dissipation effect, and avoid direct contact and friction between the bent sheet and the connecting plate during vibration or movement, reducing potential wear and extending the service life of the component.

[0022] In a possible design, positioning rivets are also provided on the first sheet and the second sheet, and the positioning rivets are riveted and fixed to the parallel plates.

[0023] With the above design, the positioning rivets serve to fix the first sheet and the second sheet. The positioning rivets are fixed to the parallel plates by riveting, which is more secure than welding or bonding, and can effectively resist displacement or deformation, thereby ensuring the overall structural stability of the terminal assembly. Furthermore, the riveted structure can be disassembled and reassembled. During repair and maintenance, there is no need to replace the entire female terminal, only the spring leaf needs to be replaced, thereby reducing the cost and complexity of repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the appearance structure of a specific embodiment of the utility model.

[0025] Figure 2 It is a cross-sectional view of a specific embodiment of the utility model.

[0026] Figure 3 It is an exploded view of a specific embodiment of the utility model.

[0027] Figure 4 The structure of the reed of the utility model is shown in FIG. Figure 1 .

[0028] Figure 5 The structure of the reed of the utility model is shown in FIG. Figure 2 .

[0029] Figure 6 It is a bottom view of the reed of the utility model.

[0030] Among them, 1. Male terminal;

[0031] 2. Female terminal; 21. Clamping plate end; 211. Parallel plate; 212. Connecting plate; 213. Socket; 22. Wire harness connecting end; 221. Clamping column; 222. Connecting cylinder; 223. Clamping groove; 224. Spring coil;

[0032] 3. Spring leaf; 31. First sheet; 32. Second sheet; 33. Bent sheet; 311. Contact spring arm; 3111. Arm bar; 3112. Connecting portion; 312. Support cantilever; 313. Positioning cantilever; 314. Guide arm; 315. Positioning rivet; 331. Spacer bump. DETAILED DESCRIPTION

[0033] like Figure 1-3 The charging seat terminal assembly shown includes a male terminal 1 and a female terminal 2. The male terminal 1 is in the shape of a plate and has a rectangular cross section. The female terminal 2 includes a clamping plate end 21 and a wiring harness connection end 22 for connecting the wiring harness in the charging seat. The two are firmly integrated to ensure a seamless transition of the current from the charging seat to the wiring harness. The clamping plate end 21 is fixedly connected to the wiring harness connection end 22. The clamping plate end 21 includes two parallel plates 211 arranged in parallel and a connecting plate 212 vertically connecting the two parallel plates 211. The two parallel plates 211 are spaced apart and form a socket 213. The socket 213 is embedded with an elastic spring 3. The male terminal 1 can be inserted into the socket 213 along the length direction of the female terminal 2 and contact the spring 3 to form an electrical connection. The male terminal 1 can be directly inserted into the socket 213, and the two parallel plates 211 and the connecting plate 212 are semi-enclosed and clamped outside the inserted male terminal 1, and the spring 3 is in elastic and close contact with the male terminal 1, thereby realizing efficient, stable and lasting electrical connection between the male terminal 1 and the female terminal 2. Not only does it ensure the high efficiency and stability of the electrical connection, but it also realizes the stable clamping of the male terminal 1, and can maintain excellent contact continuity even under dynamic conditions, thereby improving the current carrying capacity.

[0034] The harness connection end 22 includes a clamping column 221 and a connecting tube 222 which are integrally connected. A clamping groove 223 is provided at the end of the clamping column 221. The clamping plate end 21 can be fixedly installed in the clamping groove 223 by welding. The clamping groove 223 firmly embeds the clamping plate end 21 therein, so that the clamping column 221 can also provide a certain clamping force to the clamping plate end 21, thereby improving the clamping force and ensuring the structural stability of the clamping plate end 21. A spring coil 224 is installed in the connecting tube 222. The spring coil 224 is used to connect the end of the harness, provide a docking path for the harness, simplify the installation and fixing process of the harness, and thus realize the plug-in connection between the harness and a metal row such as the male terminal 1.

[0035] The socket 213 passes through both sides of the clamp end 21 in the width direction, which means that the socket 213 has a more open access angle. No matter which side the male terminal 1 is inserted from, it can be successfully docked, which improves the flexibility and applicability of use, reduces the direction restriction during docking, and improves the convenience of plugging and unplugging. In addition, the through-design promotes air circulation and helps heat to be dissipated through both sides of the socket 213. For the heat that may be generated during high-current charging, it provides an additional heat dissipation path to improve the heat dissipation performance.

[0036] like Figure 4-6 As shown, the spring sheet 3 includes a first sheet 31, a second sheet 32 ​​and a bent sheet 33. The first sheet 31 and the second sheet 32 ​​are arranged opposite to each other in the height direction, and the two are arranged in a mirror image. The bent sheet 33 is connected between the edge positions of the first sheet 31 and the second sheet 32 ​​and encloses a "U"-shaped cross section. It is equivalent to manufacturing the first sheet 31, the bent sheet 33 and the second sheet 32 ​​as a whole, forming an elastic surrounding structure. When the male terminal 1 is inserted, the first sheet 31 and the second sheet 32 ​​contact the bottom and top surfaces of the male terminal 1, and the bent sheet 33 contacts the edge of the insertion side of the male terminal 1, forming a multi-directional contact, expanding the contact flow area, helping to reduce the contact resistance and improve the efficiency of power transmission.

[0037] The first sheet 31 and the second sheet 32 ​​each include a plurality of linearly spaced contact spring arms 311, which are arranged along the length direction of the corresponding sheet. The contact spring arms 311 are in an "H" shape and include two arm bars 3111 and a connecting portion 3112 between the two arm bars 3111. The two arm bars 3111 are arranged in parallel and are integrally connected via the connecting portion 3112. The arm bars 3111 of the first sheet 31 and the second sheet 32 ​​are close to each other and form an arc-shaped protrusion, and the connecting portion 3112 is located at the highest point of the protrusion. When the male terminal 1 is inserted, it first contacts the front end of the contact spring arm 311. As the male terminal 1 goes deeper, the contact spring arm 311 is bent by pressure and comes into close contact with the male terminal 1 through elastic deformation, forming a low-impedance electrical connection. The connecting portion 3112 located at the highest point of the protrusion will inevitably contact the male terminal 1, further increasing the current transmission area, and the connecting portion 3112 can provide additional elastic support and stability for the arm bars 3111 on both sides, so that the three form a stable and elastic contact structure, ensuring that the contact spring arm 311 maintains good elastic properties and keeps good contact with the male terminal 1.

[0038] Elastic support cantilevers 312 are extended from both sides of the connecting portion 3112 along the length direction of the arm bar 3111, and the support cantilevers 312 are also tilted and bent toward the corresponding parallel plates 211, which means that two support cantilevers 312 extend outward from each connecting portion 3112. After the first sheet 31 and the second sheet 32 ​​are subjected to the plugging pressure of the male terminal 1, the contact spring arm 311 is deformed outward by the force, and the support cantilever 312 can be supported between the corresponding sheet and the parallel plate 211, providing additional elastic force, improving the elastic performance of the first sheet 31 and the second sheet 32, and making the female terminal 2 and the male terminal 1 fully and tightly contacted.

[0039] A plurality of elastic positioning cantilevers 313 are provided on the edge of one side of the first sheet 31 and the second sheet 32 ​​away from the bent sheet 33. The positioning cantilevers 313 are arranged along the width direction of the sheet. The positioning cantilevers 313 are bent into the socket 213 from the corresponding edge position and extend in the direction of the contact elastic arm 311. When the male terminal 1 is inserted, the positioning cantilever 313 first contacts the male terminal 1 to guide the male terminal 1 to align, and when fully inserted, it can provide an elastic lateral holding force to ensure that the male terminal 1 is within the preset range of movement.

[0040] In order to further prevent the male terminal 1 from deflecting, a guide arm 314 is further provided on the first sheet 31 and the second sheet 32. The guide arm 314 is arched and its two ends are integrally connected to the corresponding sheet, so that the structural support of the guide arm 314 is strengthened through the two end points. The guide arm 314 is located on the two outer sides in the width direction of the positioning cantilever 313. The arched guide arm 314 is more rigid than the positioning cantilever 313, so that the male terminal 1 insertion process has a clearer insertion path, avoiding excessive deflection caused by improper operation or applying unnecessary pressure and deformation to other elastic components such as the positioning cantilever 313 and the contact spring arm 311.

[0041] The bent sheet 33 is provided with a plurality of spacer protrusions 331, which abut against the inner side of the connecting plate 212 to separate the bent sheet and the connecting plate 212, so that a certain distance is maintained between the bent sheet and the connecting plate 212. This not only helps air circulation and heat dissipation, but also avoids direct contact and friction between the bent sheet and the connecting plate 212, reducing wear caused by long-term plugging and unplugging or vibration.

[0042] The first sheet 31 and the second sheet 32 ​​are both provided with positioning rivets 315, which are riveted and fixed to the parallel plate 211, so as to fix the spring 3 to the clamping plate end 21. Compared with irreversible connection methods such as welding, the positioning rivets 315 can be disassembled and reassembled. When the spring 3 is worn or its performance degrades due to long-term use, the old spring 3 can be directly disassembled and replaced with a new spring 3 without replacing the entire complex female terminal 2 assembly. It can be upgraded or replaced according to actual needs, which reduces maintenance costs and shortens maintenance time, and the replacement of the old and new springs 3 will not affect the continuity and stability of the electrical connection.

Claims

1. The charging seat terminal assembly includes a male terminal and a female terminal, characterized in that: The male terminal is in the shape of a plate, and its cross-section is rectangular; the female terminal includes a clamping plate end and a wiring harness connection end for connecting the wiring harness in the charging seat, the clamping plate end is fixedly connected to the wiring harness connection end, the clamping plate end includes two parallel plates arranged in parallel and a connecting plate vertically connecting the two parallel plates, the two parallel plates are arranged at intervals and form a socket, and an elastic spring is installed in the socket, and the male terminal can be inserted into the socket along the length direction of the female terminal and contact and connect with the spring.

2. The charging seat terminal assembly according to claim 1, characterized in that: The wiring harness connection end includes a clamping column and a connecting tube which are integrally connected. A clamping groove is provided at the end of the clamping column. The clamping plate end is fixedly installed in the clamping groove. A spring coil is installed in the connecting tube.

3. The charging seat terminal assembly according to claim 1 or 2, characterized in that: The socket passes through both sides of the clamping plate end in the width direction.

4. The charging seat terminal assembly according to claim 1 or 2, characterized in that: The spring sheet includes a first sheet, a second sheet and a bent sheet. The first sheet and the second sheet are arranged opposite to each other in a height direction. The bent sheet is connected between the edge positions of the first sheet and the second sheet and encloses a "U"-shaped cross section.

5. The charging seat terminal assembly according to claim 4, characterized in that: The first sheet and the second sheet each include a plurality of contact spring arms linearly spaced apart, the contact spring arms are in an "H" shape, and include two arm bars and a connecting portion between the two arm bars, the two arm bars are arranged in parallel and are integrally connected via the connecting portion, the arm bars of the first sheet and the second sheet are close to each other and form an arc-shaped protrusion, and the connecting portion is located at the highest point of the protrusion.

6. The charging seat terminal assembly according to claim 5, characterized in that: Elastic supporting cantilevers are extended from both sides of the connecting portion along the length direction of the arm bar, and the supporting cantilevers are also inclined and bent toward the corresponding parallel plates respectively.

7. The charging seat terminal assembly according to claim 6, characterized in that: A plurality of elastic positioning cantilevers are arranged on one side edge of the first sheet body and the second sheet body away from the bent sheet body, and the positioning cantilevers are bent out from the corresponding edge positions toward the direction of contacting the elastic arms.

8. The charging seat terminal assembly according to claim 7, characterized in that: The first sheet body and the second sheet body are also provided with guide arms, which are arched and have both ends integrally connected with the corresponding sheet body, and are located at the two outer sides of the positioning cantilever.

9. The charging seat terminal assembly according to claim 4, characterized in that: The bending sheet body is provided with a spacing convex point, and the spacing convex point abuts against the inner side surface of the connecting plate to separate the bending sheet and the connecting plate.

10. The charging seat terminal assembly according to claim 4, characterized in that: The first sheet body and the second sheet body are also provided with positioning rivets, and the positioning rivets are riveted and fixed to the parallel plates.

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