Plugging female end for power connection of new energy automobile

Abstract

The utility model relates to the field of power connection terminals, in particular to a plug female end for power connection of a new energy automobile, which comprises an insulating base and two conductive substrates, the conductive substrates are fixedly mounted in the insulating base, power connection pin groups are integrally formed on the conductive substrates, the power connection pin groups of the two conductive substrates are mutually symmetrical, and the power connection pin groups of the two conductive substrates are mutually connected. An auxiliary retaining plate is arranged at the ends, away from each other, of the two conductive substrates, the auxiliary retaining plate comprises a fixing part and an elastic extrusion part, the fixing part is fixedly connected with the surfaces of the conductive substrates, the elastic extrusion part extends to the outer sides of the power connection pin groups, and the elastic extrusion part is fixedly connected with the surfaces of the conductive substrates. The end, away from the fixing part, of the elastic extrusion part is tightly pressed on the outer side of the power connection pin set, a bidirectional clamping structure is formed through the two symmetrically-distributed conductive substrates and the integrally-formed power connection pin set, the elastic extrusion part of the auxiliary retaining plate is matched to continuously press the outer side of the pin set, and the radial clamping force on the male end is remarkably enhanced.

Description

Technical Field

[0001] This utility model relates to the field of electrical terminals, and in particular to female plug terminals used for connecting new energy vehicles. Background Technology

[0002] The female connector used for connecting new energy vehicles is one of the core components of the charging system. It transmits electrical energy through a conductive substrate and a male connector. In existing technology, the female connector typically consists of an insulating base and an internal conductive substrate, with the conductive substrate integrating a set of power-connecting pins to hold the male connector.

[0003] Power connection pin assemblies often employ a flexible metal sheet structure, forming an insertion area through symmetrically distributed flexible clamping plates, utilizing elastic deformation to generate clamping force. This type of structure is widely used in charging interfaces, but its long-term insertion and removal stability and resistance to deformation directly affect charging safety and service life.

[0004] The elastic clamping tabs of the current-connecting pins of existing plug-in females are prone to plastic deformation after repeated insertion and removal, resulting in a gradual decrease in clamping force. Especially under high-voltage and high-current conditions, the elastic clamping tabs are subjected to frequent heating and mechanical stress, further reducing their resilience and causing problems such as increased contact resistance and abnormal temperature rise. Utility Model Content

[0005] In order to overcome the shortcomings of existing technical solutions, this utility model provides a plug-in female terminal for connecting new energy vehicles to power, which can effectively solve the technical problem of attenuation of the clamping force of the power connection pin group.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A female connector for connecting new energy vehicles includes an insulating base and a conductive substrate. The conductive substrate is fixedly installed in the insulating base. Two conductive substrates are provided, and each conductive substrate is integrally formed with a power-connecting pin group. The power-connecting pin groups of the two conductive substrates are symmetrical to each other, and a male terminal insertion area is formed between the two power-connecting pin groups. An auxiliary retaining plate is provided at the ends of the two conductive substrates that are far apart from each other. The auxiliary retaining plate includes a fixing part and an elastic pressing part. The fixing part is fixedly connected to the surface of the conductive substrate. The elastic pressing part extends to the outside of the power-connecting pin group. An movable gap is formed between the middle section of the elastic pressing part and the power-connecting pin group. The end of the elastic pressing part away from the fixing part is pressed against the outside of the power-connecting pin group. A positioning plate is integrally formed at the end of the conductive substrate away from the power-connecting pin group. A positioning slot is provided on the inner wall of the insulating base. The positioning plate can be paired and inserted into the positioning slot.

[0008] Furthermore, the surfaces of the positioning plate and the positioning slot are provided with bolt holes, and the surface of the insulating base is provided with wiring studs. The wiring studs can pass through the bolt holes to fix the positioning plate and the positioning slot together. A wiring groove is provided at one end of the wiring stud near the surface of the wiring stud.

[0009] Furthermore, the surface of the terminal stud is provided with a wire clamping screw, which is threadedly connected to the terminal stud and extends into the terminal groove.

[0010] Furthermore, the power-connecting pin group is composed of several elastic clamping pieces arranged at equal intervals. Each elastic clamping piece includes an elastic deformation part and a clamping part. The elastic deformation part is connected to the conductive substrate, and the clamping part is arc-shaped and located at the end of the elastic deformation part away from the conductive substrate.

[0011] Furthermore, the end of the clamping part away from the elastic deformation part extends outward to form a guide arc surface. The ends of the symmetrical guide arc surfaces that are far apart from each other form a positioning groove. The end of the elastic compression part away from the fixing part presses against the inner wall of the positioning groove.

[0012] Furthermore, the end of the elastic deformation portion away from the conductive substrate is inclined inward, and the end of the male terminal insertion area near the opening gradually shrinks.

[0013] Furthermore, the surface of the conductive substrate is provided with positioning notches and positioning pieces, and the positioning pieces in one conductive substrate can be paired and inserted into the positioning notches in another conductive substrate.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: By forming a bidirectional clamping structure through two symmetrically distributed conductive substrates and an integrally formed power-connecting pin group, the elastic pressing part of the auxiliary retaining plate continuously presses the outer side of the pin group, significantly enhancing the radial clamping force on the male end, avoiding contact loosening caused by vibration or external force during the insertion process. The elastic pressing part and the power-connecting pin group are designed with an movable gap, allowing the pin group to produce moderate elastic deformation during insertion and removal. At the same time, the reverse constraint force of the elastic pressing part limits excessive deformation, effectively preventing metal fatigue and plastic deformation, ensuring stable clamping force after long-term use. The power-connecting pin group and the auxiliary retaining plate work together to make the male plug be subjected to uniform force in the insertion area. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0016] Figure 2 This is an exploded view of the structure of this utility model;

[0017] Figure 3 This is a cross-sectional view of the structure of this utility model;

[0018] The following are the labels in the diagram: 1-Insulating base, 2-Conductive substrate, 3-Power pin group, 4-Male terminal insertion area, 5-Auxiliary retaining plate, 501-Fixing part, 502-Elastic compression part, 6-Moveable gap, 7-Positioning plate, 8-Positioning slot, 9-Bolt hole, 10-Wire stud, 11-Wire groove, 12-Wire clamping screw, 13-Elastic clamping piece, 1301-Elastic deformation part, 1302-Clamping part, 1303-Guide arc surface, 1304-Positioning groove, 14-Positioning notch, 15-Positioning piece. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] The following is combined with Figures 1-3 The present invention provides a detailed description of the plug-in female terminal for connecting new energy vehicles to power.

[0021] A female connector for connecting new energy vehicles includes an insulating base 1 and a conductive substrate 2. The conductive substrate 2 is fixedly installed in the insulating base 1. Two conductive substrates 2 are provided. Each conductive substrate 2 is integrally formed with a power connection pin group 3. The power connection pin groups 3 of the two conductive substrates 2 are symmetrical to each other, and a male terminal insertion area 4 is formed between the two power connection pin groups 3. An auxiliary holding plate 5 is provided at the ends of the two conductive substrates 2 that are far apart from each other. The auxiliary holding plate 5 includes a fixing part 501 and an elastic pressing part 502. The fixing part 501 is fixedly connected to the surface of the conductive substrate 2. The elastic pressing part 502 extends to the outside of the power connection pin group 3. An movable gap 6 is formed between the middle section of the elastic pressing part 502 and the power connection pin group 3. The end of the elastic pressing part 502 that is far away from the fixing part 501 is pressed against the outside of the power connection pin group 3. A positioning plate 7 is integrally formed at the end of the conductive substrate 2 that is far away from the power connection pin group 3. A positioning slot 8 is provided on the inner wall of the insulating base 1. The positioning plate 7 can be paired and inserted into the positioning slot 8.

[0022] Two symmetrically distributed conductive substrates 2 and an integrally formed power-connecting pin group 3 form a bidirectional clamping structure. The elastic pressing part 502 of the auxiliary retaining plate 5 continuously presses the outer side of the pin group, significantly enhancing the radial clamping force on the male end and preventing contact loosening caused by vibration or external force during the insertion process. An movable gap 6 is designed between the elastic pressing part 502 and the power-connecting pin group 3, allowing the pin group to produce moderate elastic deformation during insertion and removal. At the same time, the reverse constraint force of the elastic pressing part 502 limits excessive deformation, effectively preventing metal fatigue and plastic deformation, and ensuring stable clamping force after long-term use. The power-connecting pin group 3 and the auxiliary retaining plate 5 work together to make the male plug be subjected to uniform force in the insertion area.

[0023] Both the positioning plate 7 and the positioning slot 8 have bolt holes 9 on their surfaces, and the insulating base 1 has a stud 10 on its surface. The stud 10 passes through the bolt holes 9 to fix the positioning plate 7 and the positioning slot 8. A wiring groove 11 is provided at one end of the stud 10 near its surface. The fixed connection between the stud 10 and the bolt holes 9 enhances the assembly rigidity of the conductive substrate 2 and the insulating base 1, preventing the positioning plate 7 from loosening due to vibration and ensuring that the conductive substrate 2 maintains its alignment accuracy over a long period. A wire clamping screw 12 is provided on the surface of the stud 10. The wire clamping screw 12 is threadedly connected to the stud 10 and extends into the wiring groove 11. The wiring groove 11 simplifies the connection process of external wires. The extended structure of the stud 10 increases the contact area of ​​the wires, reduces contact resistance, and improves the stability of high-current transmission. The threaded connection facilitates wire installation and maintenance. Adjusting the screw depth of the wire clamping screw 12 adapts to different wire diameter requirements, improving versatility and ease of operation.

[0024] The power connection pin group 3 is composed of several elastic clamping pieces 13 arranged at equal intervals. Each elastic clamping piece 13 includes an elastic deformation part 1301 and a clamping part 1302. The elastic deformation part 1301 is connected to the conductive substrate 2, and the clamping part 1302 is arc-shaped. The clamping part 1302 is located at the end of the elastic deformation part 1301 away from the conductive substrate 2. The equidistant distribution of the elastic clamping pieces 13 makes the male plug uniformly stressed at each point in the insertion area, reducing metal fatigue caused by local stress concentration and extending the service life of the clamping pieces. The arc-shaped clamping part 1302 forms a surface contact with the surface of the male plug, which significantly increases the effective contact area, reduces temperature rise and contact resistance, and improves conductivity compared to the traditional point contact structure. The clamping part 1302 extends outward from the end away from the elastic deformation part 1301, thereby forming a guide arc surface 1303. The symmetrical guide arc surfaces 1303 form a positioning groove 1304 at their ends away from each other. The end of the elastic squeezing part 502 away from the fixing part 501 presses against the inner wall of the positioning groove 1304. The guide arc surface 1303 provides progressive guidance when the male end is inserted, avoiding rigid collision between the plug and the clamping part 1302, reducing insertion and extraction resistance and metal surface wear. The pressing action of the elastic squeezing part 502 on the inner wall of the positioning groove 1304 forms a lateral limit on the clamping part 1302, preventing the clamping part 1302 from excessively expanding and deforming outward during frequent insertion and extraction, and maintaining the durability of the clamping force.

[0025] The end of the elastic deformation portion 1301 away from the conductive substrate 2 is inclined inward, and the end of the male plug area 4 near the opening gradually shrinks. The inward inclination design of the elastic deformation portion 1301 generates a progressive clamping force when the male plug is inserted. The initial insertion resistance is small, and the clamping force automatically increases after the plug is in place. This realizes the plug-in logic of first guiding and then locking, constrains plug offset, ensures that the plug is inserted along the preset path, and reduces the risk of poor contact caused by plug misalignment.

[0026] The conductive substrate 2 has a positioning notch 14 and a positioning piece 15 on its surface. The positioning piece 15 in one conductive substrate 2 can be paired and inserted into the positioning notch 14 in another conductive substrate 2. The interlocking structure of the positioning piece 15 and the positioning notch 14 enables the precise alignment and installation of the two conductive substrates 2, avoiding asymmetry of the power connection pin group 3 or imbalance of clamping force due to misalignment during assembly. It provides lateral restraint when the conductive substrate 2 is subjected to thermal expansion or mechanical impact, preventing relative displacement of the conductive substrate 2 and ensuring the long-term cooperative stability of the bidirectional clamping structure.

[0027] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A female connector for connecting new energy vehicles to power, comprising an insulating base and a conductive substrate, wherein the conductive substrate is fixedly installed in the insulating base, characterized in that: The conductive substrate comprises two pieces, each integrally formed with a set of power-connecting pins. The power-connecting pin sets of the two conductive substrates are symmetrical to each other, and a male terminal insertion area is formed between the two sets of power-connecting pins. An auxiliary retaining plate is provided at the ends of the two conductive substrates that are far apart from each other. The auxiliary retaining plate includes a fixing part and an elastic pressing part. The fixing part is fixedly connected to the surface of the conductive substrate. The elastic pressing part extends to the outside of the power-connecting pin set. An movable gap is formed between the middle section of the elastic pressing part and the power-connecting pin set. The end of the elastic pressing part away from the fixing part is pressed against the outside of the power-connecting pin set. A positioning plate is integrally formed at the end of the conductive substrate away from the power-connecting pin set. A positioning slot is provided on the inner wall of the insulating base. The positioning plate can be paired and inserted into the positioning slot.

2. The plug-in female terminal for connecting new energy vehicles to power as described in claim 1, characterized in that: Both the positioning plate and the positioning slot have bolt holes on their surfaces, and the insulating base has wiring studs on its surface. The wiring studs can pass through the bolt holes to fix the positioning plate and the positioning slot together. A wiring groove is provided at one end of the wiring stud near the surface of the wiring stud.

3. The plug-in female terminal for connecting new energy vehicles to power as described in claim 2, characterized in that: The surface of the terminal stud is provided with a wire clamping screw, which is threadedly connected to the terminal stud and extends into the terminal groove.

4. The plug-in female terminal for connecting new energy vehicles to power according to any one of claims 1-3, characterized in that: The power-connecting pin group is composed of several elastic clamping pieces arranged at equal intervals. Each elastic clamping piece includes an elastic deformation part and a clamping part. The elastic deformation part is connected to the conductive substrate, and the clamping part is arc-shaped and located at the end of the elastic deformation part away from the conductive substrate.

5. The plug-in female terminal for connecting new energy vehicles to power as described in claim 4, characterized in that: The clamping part extends outward from the end away from the elastic deformation part to form a guide arc surface. The symmetrical guide arc surfaces form a positioning groove at their ends that are far apart from each other. The end of the elastic extrusion part that is far away from the fixing part presses against the inner wall of the positioning groove.

6. The plug-in female terminal for connecting new energy vehicles to power as described in claim 4, characterized in that: The end of the elastic deformation portion away from the conductive substrate is inclined inward, and the end of the male terminal insertion area near the opening gradually shrinks.

7. The plug-in female terminal for connecting new energy vehicles to power according to any one of claims 1-3, characterized in that: The conductive substrate has a positioning notch and a positioning piece on its surface. The positioning piece in one conductive substrate can be paired and inserted into the positioning notch in another conductive substrate.

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