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CN-121813039-B - Vehicle-standard single-core via shielding connector

CN121813039BCN 121813039 BCN121813039 BCN 121813039BCN-121813039-B

Abstract

The invention provides a vehicle-standard single-core via shielding connector, and belongs to the technical field of new energy automobiles. The connector comprises a shell component, an O-shaped ring, a shielding ring, a wire sealing body and a tail cover, wherein the shell component is integrally formed by injection molding of a metal mounting head and a plastic shell, the shielding ring is an integrally drawn seamless metal component, and a crimping barrel, a stress isolation groove, a positioning step part and an annular contact part with a spherical convex hull are sequentially arranged along the axial direction. The invention uses the shielding ring structure of the seamless stress isolation groove to eliminate the crimping cracking risk and deformation interference, uses the C-shaped cutting groove to match with the spherical convex hull structure to realize the reliable shielding of vibration resistance, and uses the positioning step to realize the axial stop of the cable. In addition, the tail cover B adopts a movable hinge and a double buckle structure which are integrally injection molded, and is matched with a special deformation groove and an anti-rebound inclined plane, so that the corrugated pipe is firmly gripped and prevented from loosening. The invention has the characteristics of high vibration resistance, high sealing and convenient assembly.

Inventors

  • CHEN BING
  • Zou Dihe
  • XU WEIKUN
  • LI QIAOFEI
  • YANG XIAOHUI

Assignees

  • 上海文依电气股份有限公司

Dates

Publication Date
20260508
Application Date
20260310

Claims (9)

  1. 1. The vehicle-gauge single-core via-hole shielding connector is characterized by comprising an O-shaped ring (1), a shell component (2), a shielding ring (4), a wire sealing body (5) and a tail cover; the shell component (2) comprises a metal mounting head (21) and a plastic shell (22) which is coated outside the metal mounting head (21) in an injection molding way, wherein an annular groove is formed at the tail end of a screw tooth of the shell component (2), the O-shaped ring (1) is mounted in the annular groove, the shielding ring (4) is an integrally formed metal component, is sleeved and fixed on a shielding layer of a cable (7) and is arranged inside the shell component (2), the wire sealing body (5) is mounted on one side of the shielding ring (4) and is abutted against the tail cover, the tail cover is sleeved outside the cable (7) and is buckled with the shell component (2) to be fixed, the shielding ring (4) is a seamless cylindrical structure formed by multi-pass drawing, a crimping barrel body, a stress isolation groove (41), a positioning step part and an annular contact part are sequentially arranged along the axial direction, the crimping barrel body is fixedly arranged on the shielding layer of the cable (7) in an outward turned-over mode through plastic deformation, the stress isolation groove (41) is circumferentially arranged along the necking part, the annular step part is used for blocking the stress isolation groove, the stress isolation groove is formed along the annular step part, the annular part is formed and extends to the positioning step part to deform along the radial direction, and extends to the positioning step part, and is deformed outwards along the annular part, and is formed along the annular part, the annular contact part is provided with a plurality of C-shaped cutting grooves (43), the C-shaped cutting grooves (43) surround and form elastic contact tongue pieces protruding outwards, the elastic contact tongue pieces are provided with spherical convex hulls (42), and the elastic deformation capacity of the root parts of the C-shaped cutting grooves is utilized to keep interference contact with the inner wall of the metal mounting head (21).
  2. 2. The vehicle-mounted single-core via shielding connector according to claim 1, wherein the number of the spherical convex hulls (42) is 2-20, the spherical convex hulls are uniformly distributed along the circumferential direction of the annular contact part, and the convex direction of the spherical convex hulls (42) faces to the radial outer side.
  3. 3. The vehicle-sized single-core via shielded connector of claim 1, wherein the shield ring (4) and the housing assembly (2) are sized to fit a cable (7) having a cross-sectional area in the range of 25mm2 to 150mm2, and the external thread gauge of the metal mounting head (21) includes, but is not limited to, M16, M25, M32, and M36 standard metric threads.
  4. 4. The vehicle-gauge-level single-core via shielding connector according to claim 1, wherein the tail cover is a tail cover A (6), the tail cover A (6) comprises a tail cover body and a fastening structure, the fastening structure comprises cantilever beams arranged on two sides of the tail cover body and barbs positioned at the tail ends of the cantilever beams, and the shell assembly (2) is provided with clamping grooves matched with the barbs.
  5. 5. The vehicle-gauge-level single-core via shielding connector according to claim 1, wherein the tail cover is a tail cover B (8), the tail cover B (8) is used for being connected with a corrugated pipe (9), a first buckling groove (82) and a second buckling groove (81) are formed in the outer wall of the tail cover B (8), and a fastener is connected to the outer wall of the first buckling groove (82) through a movable hinge formed through integral injection molding.
  6. 6. The vehicle-mounted single-core via shielding connector according to claim 5, wherein a first buckle (83) is arranged at one end, close to the first buckle groove (82), of the fastener, the first buckle (83) is in clamping fit with the first buckle groove (82), a second buckle (84) is arranged at one end, away from the first buckle groove (82), of the fastener, and the second buckle (84) is in clamping fit with the second buckle groove (81).
  7. 7. The vehicle-gauge-level single-core via shielding connector according to claim 5, wherein a first limiting rib is arranged on the inner wall of the tail cap B (8), a second limiting rib is arranged on the inner wall of the fastener, and the first limiting rib and the second limiting rib (85) are matched to clamp the trough position of the corrugated pipe (9).
  8. 8. The vehicle-mounted single-core via shielded connector of claim 1, further comprising a terminal (3), the terminal (3) being crimped to a conductor end of a cable (7), and the terminal (3) passing through the shield ring (4) and protruding outside the housing assembly (2).
  9. 9. The vehicle-gauge single-core via shielded connector of claim 1, wherein the outer surface of the metal mounting head (21) is provided with a rotation stopping groove (211) and an axial limiting groove (212), and the rotation stopping groove (211) and the axial limiting groove (212) are filled with injection molding materials of the plastic housing (22) to form an interlocking fixing structure.

Description

Vehicle-standard single-core via shielding connector Technical Field The invention relates to the technical field of high-voltage connection systems of new energy automobiles, in particular to a vehicle-standard single-core via shielding connector. Background With the advancement of a voltage platform of a new energy automobile electrical system to 800V or even higher, the electromagnetic shielding performance of a high-voltage connector is one of important factors affecting the safety of the whole automobile. In the existing design of a single-core via shielded connector, a metal shielding ring structure is generally used to realize the conduction of a shielding loop. For example, chinese patent application publication No. CN110190451a discloses a wire connector and a shielding sleeve assembly thereof, in which the technical scheme includes a metal shielding sleeve, a plurality of elastic cantilevers turned outwards are disposed on the circumference of the front end of the shielding sleeve for elastically abutting against the inner wall of the housing, and the rear end is fixed on the cable shielding layer by crimping. However, in a practical vehicle-scale application scenario, in particular in the severe vibration regime described in GB/T38661-2020, such an cantilever beam contact structure exposes significant limitations: High frequency vibration failure-the cantilever structure is essentially a spring vibrator with a specific natural frequency. When the random vibration frequency generated by the running of the vehicle is overlapped with the natural frequency of the cantilever beam, resonance is caused, so that micron-sized repeated sliding abrasion of the contact is generated, oxidized fragments are generated, the contact resistance is rapidly increased, and the shielding effectiveness is greatly attenuated. The prior art shielding sleeve is usually an integral thin-walled cylinder, and when the hexagonal crimping operation is carried out on the crimping area at the rear end of the shielding sleeve, plastic flow and deformation stress of metal are easily transferred to the contact area at the front end, so that the roundness of the front end is distorted, and part of spring arms cannot be effectively contacted, so that shielding leakage is caused. The axial tensile capacity is weak, the cable is often resisted by the friction force of an external plastic nut to be drawn in the axial direction, and the cable is easy to be fixed and loosened due to plastic creep after long-term use. Disclosure of Invention The invention aims to solve the defects in the prior art and designs a connector with high vibration resistance, low contact resistance and high tensile strength. The technical scheme includes that the vehicle-gauge-level single-core through hole shielding connector comprises an O-shaped ring, a shell assembly, a shielding ring, a wire sealing body and a tail cover, wherein the shell assembly comprises a metal mounting head and a plastic shell which is coated on the outer portion of the metal mounting head in an injection molding mode, an annular groove is formed in the tail end of a screw thread of the shell assembly, the O-shaped ring is mounted in the annular groove to achieve sealing and waterproofing of a connector mounting interface, the wire sealing body is mounted on one side of the shielding ring and is abutted to the tail cover for sealing and buffering of the tail portion of a cable, and the tail cover is sleeved on the outer portion of the cable and is buckled with the shell assembly to achieve fixation. As a core improvement point of the invention, the shielding ring is a seamless cylindrical structure formed by drawing a metal strip by multiple passes, and is sequentially provided with a crimping cylinder, a stress isolation groove, a positioning step part and an annular contact part along the axial direction. The crimping barrel is fixed on the shielding layer of cable valgus through plastic deformation crimping, and the purpose is to realize low-resistance electric conduction and mechanical fixation between the shielding ring and the cable. The stress isolation groove is arranged between the crimping barrel and the positioning step part and is of a circumferential annular necking or thin-wall structure, and the stress isolation groove has the function of blocking plastic flow stress generated by the crimping barrel when in high-deformation crimping from being transmitted to the front end, and preventing the positioning step part and the annular contact part from being warped or out of round due to stress transmission, so that the precision of the contact size is ensured. The positioning step part extends outwards along the radial direction to form an abutting surface, a corresponding blocking step is arranged on the inner wall of the metal mounting head, the positioning step part is matched with the blocking step to form an axial stop structure, the purpose of directly bearing the axial