Grounding structure

Abstract

The utility model discloses a grounding structure, which comprises a support, a terminal group, a conductive cable and a common ground reed, the terminal group comprises at least two power terminals and a PE terminal, a shielding ring is crimped outside a shielding layer of the conductive cable, and the power terminals are electrically connected with the end part of a conductor of the conductive cable. At least part of the power terminal and the shielding ring are arranged in the mounting cylinder of the support, the common ground reed comprises a connecting part and a contact reed, the connecting part and the contact reed are connected through a plurality of connecting reeds, the contact reed is arranged in the inner wall of the mounting cylinder and electrically connected with the shielding ring in a contact mode, and the connecting part is electrically connected with the PE terminal. According to the utility model, the shielding layer of the conductive cable electrically connected with the adjacent power terminals is electrically connected with the integrated common ground reed through the shielding ring, and then is electrically connected with the PE terminal through the connecting part of the common ground reed, thereby forming a shielding loop, simplifying the structure of a grounding system, and detecting the shielding layer loop of the conductive cable during electric detection. The shielding effect is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy automobile circuits, and more specifically, to a grounding structure. Background Art

[0002] With the rapid development and popularization of new energy vehicles, the PE terminal in the charging seat of electric vehicles needs to be grounded to protect equipment and people when leakage occurs. Generally, in the design process of the charging interface, the grounding system often requires multiple connection components, usually the grounding terminal is crimped with a copper wire, and the other side of the copper wire is crimped with the terminal for grounding. The grounding structure is complex, and the installation and processing are time-consuming and labor-intensive. It is easy to make connection errors, causing short circuits and damage to the body line. After the power terminal in the charging seat is connected to the conductor of the conductive cable, the shielding layer of the conductive cable is generally not designed inside the charging seat and is not grounded. There is no shielding layer loop for detection during electrical inspection. Damage to the shielding layer cannot be detected, and it cannot be discovered and repaired in time. There will also be damage inside the cable, resulting in leakage current and leakage, resulting in the risk of electric shock and casualties. Therefore, a new solution is urgently needed in the existing technology to solve the above problems. Utility Model Content

[0003] The utility model aims to provide a grounding structure to solve the above-mentioned problems of complex grounding structure and no detectable shielding loop in the shielding layer.

[0004] According to the utility model, a grounding structure is provided, including a bracket, a terminal group, a conductive cable and a common ground spring, the bracket including a base and at least two through-mounting cylinders perpendicular to the base and parallel to each other, the conductive cable including a conductor, an inner insulating layer and a shielding layer connected from the inside to the outside, a shielding ring is sleeved on the outside of the shielding layer and electrically connected, the terminal group includes at least two power terminals and a PE terminal, one end of the power terminal is electrically connected to the end of the conductor, at least part of the power terminal and the shielding ring are arranged in the mounting cylinder, the common ground spring includes a connecting portion and at least two contact springs, the connecting portion and the contact springs are connected by a plurality of connecting springs, the contact springs are arranged in the inner wall of the mounting cylinder and are in contact with and electrically connected to the shielding ring, and the connecting portion is electrically connected to the PE terminal.

[0005] Optionally, the shielding ring comprises a crimping section crimped on the outer wall of the shielding layer and a contact section abutting against the contact spring, and a diameter of the contact section is greater than a diameter of the crimping section.

[0006] Optionally, the contact spring comprises an annular base band and a plurality of elastic contact arms circumferentially spaced along a lower edge of the annular base band, and the plurality of elastic contact arms abut against an outer wall of the contact section at their minimum inner diameters.

[0007] Optionally, the elastic contact arm is provided with a first contact portion bent in the axial direction, the first contact portion abuts against the outer wall of the contact section, and the elastic contact arm is also provided with a second contact portion bent away from the axial direction, the second contact portion abuts against the inner wall of the mounting tube.

[0008] Optionally, the upper edge of the annular base band is bent outward to form at least two hook portions disposed at intervals, and the hook portions are engaged with the cylinder wall of the mounting cylinder to fix the contact spring on the bracket.

[0009] Optionally, two of the hook portions that are closest to each other on adjacent contact springs are connected to the connecting portion via the connecting spring.

[0010] Optionally, the connecting portion, the plurality of connecting springs and the contact spring are integrally stamped from the same plate.

[0011] Optionally, there are two contact springs, and the connecting springs are formed by bending two ends of the connecting portion at 90 degrees, and the two contact springs are formed by stamping the ends of the connecting springs.

[0012] Optionally, the connecting portion and the base are both provided with corresponding mounting holes, and the connecting portion is electrically connected to the PE terminal by means of bolts passing through the mounting holes.

[0013] Optionally, the power terminal comprises a fixing portion and a wiring portion, wherein at least a portion of the wiring portion is flat, and at least a portion of the flat wiring portion is electrically connected to the conductor.

[0014] The beneficial effects produced by the utility model are:

[0015] This design adopts an integrated common ground spring, which includes a connecting part, at least two contact springs and a connecting spring. The contact spring is connected to the connecting part through multiple connecting springs, the power terminal is connected to the conductor of the charging cable, the shielding layer of the charging cable is crimped with a shielding ring, the shielding ring is electrically connected to the common ground spring through the contact spring, and then electrically connected to the PE terminal through the connecting part. The PE terminal is then connected to the vehicle body grounding system through the PE cable to complete the grounding, which solves the problem that the traditional grounding system requires multiple connectors, has a complex structure, and is time-consuming and labor-intensive to install and process.

[0016] After the power terminal of the present design is connected to the conductor of the conductive cable, the shielding ring on the outside of the shielding layer of the conductive cable is electrically connected to the PE terminal through an integrated common ground spring and then grounded. During electrical inspection, there is a shielding layer loop available for detection, and shielding layer damage can be discovered and repaired in time. The integrity and good condition of the shielding layer also avoids the phenomenon of leakage current caused by damage inside the conductive cable, thereby avoiding the risk of electric shock casualties.

[0017] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0019] Figure 1 This is a schematic diagram of a grounding structure of the utility model;

[0020] Figure 2 It is a cross-sectional view of a grounding structure of the utility model;

[0021] Figure 3 It is a structural schematic diagram of the common ground spring of the utility model.

[0022] The following are marked in the figure:

[0023] 1. Base; 2. Mounting tube; 3. Power terminal; 31. Wiring part; 32. Fixing part; 4. PE terminal; 5. Conductive cable; 51. Conductor; 52. Inner insulation layer; 53. Shielding layer; 6. Common ground spring; 61. Connecting part; 611. Mounting hole; 62. Connecting spring; 63. Contact spring; 631. First contact part; 632. Second contact part; 633. Hook part; 634. Ring base band; 7. Shielding ring; 71. Crimping section; 72. Contact section; 8. Bolt. DETAILED DESCRIPTION

[0024] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0025] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0026] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0027] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0028] The utility model Figure 1-Figure 3As shown, a grounding structure is provided, including a bracket, a terminal group, a conductive cable 5 and a common ground spring 6, the bracket includes a base 1 and at least two through-mounting tubes 2 perpendicular to the base 1 and parallel to each other, the conductive cable 5 includes a conductor 51, an inner insulating layer 52 and a shielding layer 53 connected from the inside to the outside, the shielding layer 53 is sleeved on the outside and electrically connected with a shielding ring 7, the terminal group includes at least two power terminals 3 and a PE terminal 4, one end of the power terminal 3 is electrically connected to the end of the conductor 51, at least part of the power terminal 3 and the shielding ring 7 are arranged in the mounting tube 2, the common ground spring 6 includes a connecting portion 61 and at least two contact springs 63, the connecting portion 61 and the contact spring 63 are connected by a plurality of connecting springs 62, the contact spring 63 is arranged in the inner wall of the mounting tube 2 and is in contact with and electrically connected to the shielding ring 7, and the connecting portion 61 is electrically connected to the PE terminal 4.

[0029] With the rapid development and popularization of new energy vehicles, the PE terminal 4 in the charging seat of electric vehicles needs to be grounded to protect equipment and people when leakage occurs. Generally, in the design process of the charging interface, the grounding system often requires multiple connectors, usually the grounding terminal is crimped with a copper wire, and the other side of the copper wire is crimped with a terminal for grounding. The grounding structure is complex, and the installation and processing are time-consuming and labor-intensive. It is easy to make connection errors, causing short circuits and damaging the body lines. After the power terminal 3 in the charging seat is connected to the conductor 51 of the conductive cable 5, the shielding layer 53 of the conductive cable 5 is generally not designed inside the charging seat and is not grounded. There is no shielding layer 53 loop available for detection during electrical inspection. Damage to the shielding layer 53 cannot be detected, and it cannot be discovered and repaired in time. Damage to the shielding layer 53 will also cause damage to the conductive cable 5, resulting in leakage current and leakage, resulting in the risk of electric shock and casualties.

[0030] The present design adopts an integrated common ground spring 6, which includes a connecting portion 61, at least two contact springs 63 and a connecting spring 62. The contact spring 63 is connected to the connecting portion 61 through a plurality of connecting springs 62, the power terminal 3 is connected to the conductor 51 of the charging cable, the shielding layer 53 of the conductive cable 5 is crimped with a shielding ring 7, the shielding ring 7 is electrically connected to the common ground spring 6 through the contact spring 63, the common ground spring 6 is electrically connected to the PE terminal 4 through the connecting portion 61, and the PE terminal 4 is connected to the vehicle body grounding system via the PE cable to complete the grounding, thereby solving the problem that the traditional grounding system requires multiple connectors, has a complex structure, and is time-consuming and labor-intensive to install and process.

[0031] After the power terminal 3 of the present design is connected to the conductor 51 of the conductive cable 5, the shielding ring 7 outside the shielding layer 53 of the conductive cable 5 is electrically connected to the PE terminal 4 through the integrated common ground spring 6, and the PE terminal 4 is then grounded. During the electrical inspection, there is a shielding layer 53 loop available for detection, and damage to the shielding layer 53 can be discovered and repaired in time. The integrity and good condition of the shielding layer 53 also avoids the phenomenon of leakage current caused by damage inside the conductive cable 5, thereby avoiding the risk of electric shock casualties.

[0032] In some embodiments, Figure 2 As shown, the shielding ring 7 includes a crimping section 71 crimped to the outer wall of the shielding layer 53 and a contact section 72 abutting against the contact spring 63 , and the diameter of the contact section 72 is greater than the diameter of the crimping section 71 .

[0033] The crimping section 71 at the lower end is electrically connected to the shielding layer 53 of the conductive cable 5, and the contact section 72 at the upper end is in contact with the contact spring 63. This structural design electrically connects the shielding layer 53 of the conductive cable 5 to the common ground spring 6 through the shielding ring 7 to form a shielding loop, and a shielding loop can be detected during electrical inspection; since the contact spring 63 needs to be designed between the inner wall of the mounting tube 2 and the outer wall of the contact section 72, the diameter of the contact section 72 is designed to be larger than the diameter of the crimping section 71, which can simplify the radial size of the contact spring 63 and reduce its material usage and the complexity of its molding.

[0034] In some embodiments, Figure 2-Figure 3 As shown, the contact spring 63 includes an annular base band 634 and a plurality of elastic contact arms circumferentially spaced along the lower edge of the annular base band 634 , and the plurality of elastic contact arms abut against the outer wall of the contact section 72 at their minimum inner diameters.

[0035] The smallest inner diameter of the plurality of elastic contact arms abuts against the outer wall of the contact section 72 , which can ensure that the contact spring 63 is in full contact with the shielding ring 7 , thereby ensuring a stable electrical connection.

[0036] In some embodiments, Figure 2 As shown, the elastic contact arm is provided with a first contact portion 631 bent in the axial direction, the first contact portion 631 abuts against the outer wall of the contact section 72, and the elastic contact arm is also provided with a second contact portion 632 bent away from the axial direction, the second contact portion 632 abuts against the inner wall of the mounting tube 2.

[0037] The design of the bent first contact portion 631 can strengthen the abutment between the elastic contact arm and the contact segment 72. Combined with the abutment between the second contact and the inner wall of the mounting tube 2, the two sides of the elastic contact arm are elastically abutted between the shielding ring 7 and the mounting tube 2 without shaking, thereby further strengthening the abutment between the first contact portion 631 and the contact segment 72, ensuring stable contact and good electrical connection between the contact spring 63 and the shielding ring 7, and preventing the two from detaching during use, thereby causing electrical hazards.

[0038] In some embodiments, Figure 1-Figure 2 As shown, the upper edge of the annular base band 634 is bent outward to form at least two spaced hook portions 633 , and the hook portions 633 are engaged with the wall of the mounting tube 2 to fix the contact spring 63 on the bracket.

[0039] The hook portion 633 and the outer wall of the end of the mounting tube 2 are hung on the wall of the mounting tube 2 to fix the common ground spring 6 on the bracket, thereby preventing the contact spring 63 from falling off and shaking from the mounting tube 2, thereby ensuring long-term and stable electrical contact between the contact spring 63 and the shielding ring 7, ensuring the conduction of the shielding circuit, and ensuring electrical safety.

[0040] In some embodiments, Figure 1-Figure 2 As shown, the two hook portions 633 closest to each other on the adjacent contact spring pieces 63 are connected to the connecting portion 61 via the connecting spring piece 62 .

[0041] The nearest hook portion 633 is connected to the connecting portion 61 through the connecting spring 62 to form an integral common ground spring 6, which can not only reduce the material used for the connecting spring 62 and simplify its structure, but also reduce the spatial layout of the entire grounding structure, reduce the overall structural cost, and make it more lightweight.

[0042] In some embodiments, Figure 3 As shown, the connecting portion 61, the plurality of connecting springs 62 and the contact spring 63 are integrally stamped from the same plate.

[0043] The connecting portion 61, the plurality of connecting springs 62 and the contact spring 63 are integrally stamped and formed, which is convenient for processing and forming, has high production efficiency, and can also ensure that the overall structure is more stable and has a long service life.

[0044] In some embodiments, Figure 3 As shown, there are two contact springs 63 , and the connecting springs 62 are formed by bending the two ends of the connecting portion 61 at 90 degrees. The two contact springs 63 are formed by stamping the ends of the connecting springs 62 .

[0045] The connecting spring 62, the connecting portion 61 and the contact spring 63 are the same sheet material, which is first formed into a prefabricated sheet by stamping and punching. The two ends of the prefabricated sheet are bent 90 degrees to form the connecting portions 61 at both ends. The ends of the connecting portion 61 are then stamped to form the contact spring 63. The entire structure is stamped and formed in one piece, with fast forming and stable overall structure.

[0046] In some embodiments, Figure 3 As shown, the connecting portion 61 and the base 1 are both provided with corresponding mounting holes 611 , and the connecting portion 61 is electrically connected to the PE terminal 4 through a bolt 8 (not shown in the figure) passing through the mounting hole 611 .

[0047] The connecting part 61 is electrically connected to the PE terminal 4 through the bolt 8, and the shielding ring 7 outside the shielding layer 53 of the conductive cable 5 is electrically connected to the PE terminal 4, completing the connection of the shielding circuit, facilitating electrical inspection of the shielding circuit, ensuring electrical safety, and the bolt 8 connection method is also convenient for installation, disassembly and maintenance.

[0048] In some embodiments, Figure 2 As shown, the power terminal 3 includes a fixing portion 32 and a wiring portion 31 . The wiring portion 31 is at least partially flat, and at least a portion of the flat wiring portion 31 is electrically connected to the conductor 51 .

[0049] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A grounding structure, characterized in that: It includes a bracket, a terminal group, a conductive cable and a common ground spring. The bracket includes a base and at least two through-mounting tubes perpendicular to the base and parallel to each other. The conductive cable includes a conductor, an inner insulating layer and a shielding layer connected from the inside to the outside. A shielding ring is sleeved on the outside of the shielding layer and electrically connected. The terminal group includes at least two power terminals and one PE terminal. One end of the power terminal is electrically connected to the end of the conductor. At least part of the power terminal and the shielding ring are arranged in the mounting tube. The common ground spring includes a connecting part and at least two contact springs. The connecting part and the contact spring are connected by a plurality of connecting springs. The contact spring is arranged in the inner wall of the mounting tube and is electrically connected to the shielding ring. The connecting part is electrically connected to the PE terminal.

2. A grounding structure according to claim 1, characterized in that: The shielding ring comprises a crimping section crimped on the outer wall of the shielding layer and a contact section abutting against the contact spring sheet, and a diameter of the contact section is greater than a diameter of the crimping section.

3. A grounding structure according to claim 2, characterized in that: The contact spring comprises an annular base band and a plurality of elastic contact arms circumferentially spaced along the lower edge of the annular base band, and the plurality of elastic contact arms abut against the outer wall of the contact section at their minimum inner diameters.

4. A grounding structure according to claim 3, characterized in that: The elastic contact arm is provided with a first contact portion bent in the axial direction, the first contact portion abuts against the outer wall of the contact section, and the elastic contact arm is also provided with a second contact portion bent away from the axial direction, the second contact portion abuts against the inner wall of the mounting tube.

5. A grounding structure according to claim 3, characterized in that: The upper edge of the annular base band is bent outward to form at least two hook portions arranged at intervals, and the hook portions are engaged with the cylinder wall of the mounting cylinder to fix the contact spring on the bracket.

6. A grounding structure according to claim 5, characterized in that: The two hook portions on the adjacent contact springs that are closest to each other are connected to the connecting portion via the connecting spring.

7. A grounding structure according to claim 1, characterized in that: The connecting portion, the plurality of connecting springs and the contact spring are integrally stamped from the same plate.

8. A grounding structure according to claim 7, characterized in that: There are two contact springs, and the connecting springs are formed by bending the two ends of the connecting portion at 90 degrees. The two contact springs are formed by stamping the ends of the connecting springs.

9. A grounding structure according to claim 1, characterized in that: The connecting portion and the base are both provided with corresponding mounting holes, and the connecting portion is electrically connected to the PE terminal by passing a bolt through the mounting hole.

10. A grounding structure according to claim 1, characterized in that: The power terminal includes a fixing portion and a wiring portion, wherein at least a portion of the wiring portion is flat, and at least a portion of the flat wiring portion is electrically connected to the conductor.

Images