High-power quick plug for three-phase alternating-current charging pile

By designing a high-power fast plug of a 3-phase AC charging pile, using a buried structure, a steel ball guide ring and a rubber core anti-stupid positioning system, the problems of inconvenience in plugging and unplugging and the risk of electric shock are solved, and the plug is conveniently used and efficient charging is achieved.

CN222581713UActive Publication Date: 2025-03-07ZHONG SHAN SHI GUO GUANG XIN NENG KE JI YOU XIAN GONG SI
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Patent Information

Application Number
CN202323462127.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2023-12-18
Publication Date
2025-03-07
Estimated Expiration
2033-12-18

AI Technical Summary

Technical Problem

During use, the existing three-phase AC charging pile fast plugs have problems such as inconvenience in plugging and unplugging, risk of electric shock, poor conductivity, too fast temperature rise and poor waterproof performance, which affects the user experience and equipment safety.

Method used

A high-power fast plug of a three-phase AC charging pile is designed, adopting a buried structure and a steel ball guide ring, which achieves the convenience and safety of plugging and unplugging through the return spring and the spring. Through the coordination of the rubber core ribs and the rubber core grooves and the design of the front rubber core and the gland core of the main body, ensure that there is a gap in the axial direction of the needle core, reduce contact resistance, and improve conductivity.

Benefits of technology

The plug ensures smooth and safe plug-in and unplugging through the buried structure and guide ring system, and reduces the risk of electric shock; through the coordination of the glue core and the glue core groove, good contact between the needle core is achieved, contact resistance is reduced, and charging is ensured efficient and safe.

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Abstract

The utility model discloses a three-phase AC charging pile high-power quick plug, which relates to the technical field of AC charging pile plugs, and comprises a male connector, a female connector and a male pin, one side of the outer wall of the male connector is in butt joint with the female connector, and the male pin is arranged in the male connector. When the three-phase alternating-current charging pile high-power quick plug is used, people are ensured not to get an electric shock during use and equipment safety is ensured through a buried structure and ensuring that a ground wire pin preferentially contacts a female connector, so that an electric shock prevention effect is achieved, and through mutual matching of a rubber core rib and a rubber core groove, fool-proof positioning of a rubber core is achieved; and through the main body front rubber core and the gland rubber core, the axial gap of the pin core is ensured, so that the good contact between the male pin and the female pin is ensured, the contact resistance is reduced, the high-power charging of the charging pile is ensured, and the temperature rise is effectively reduced, thereby playing a role of convenient butt joint when the high-power quick plug of the three-phase alternating-current charging pile is used.
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Description

Technical Field

[0001] The utility model relates to the technical field of AC charging pile plugs, in particular to a three-phase AC charging pile high-power fast plug. Background Art

[0002] A 3-phase AC charging pile is a device that uses a three-phase AC power supply to provide charging capabilities for electric vehicles, and a quick plug is a very common auxiliary component on a 3-phase AC charging pile. It is a plug designed to increase the connection speed. It generally uses a three-phase AC power supply and has a high charging power, which can meet the charging needs of electric vehicles of different brands and models.

[0003] During the use of a 3-phase AC charging pile, when a high-power quick plug is needed for assistance, first pull the wire to connect the male connector with the female connector. At this time, the male pin and the female pin are connected, and then the power of the 3-phase AC charging pile is transmitted to the electric vehicle; but during the use of the quick plug, it is not convenient to align the center when plugging and unplugging the power plug, and there is a risk of electric shock, poor conductivity, excessive temperature rise and poor waterproof performance, which affects the use of the 3-phase AC charging pile plug. Utility Model Content

[0004] The purpose of the utility model is to provide a three-phase AC charging pile high-power fast plug to solve the problems raised by the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a 3-phase AC charging pile high-power quick plug, comprising a male connector, a female connector and a male pin, the outer wall of the male connector is butt-jointed with a female connector, a male pin is arranged inside the male connector, and the outer wall of the male pin is connected to the female pin, the outer wall of the female connector is butt-jointed with a steel ball guide ring on the side close to the male connector, and the steel ball guide ring is connected with a locking steel ball through a groove, and the inner wall of the steel ball guide ring is connected with a reset spring, and the outer wall of the reset spring is connected with a retaining spring on one side.

[0006] Preferably, it comprises a male connector, a male pin and a ground pin, wherein the ground pin is connected to the center of the male connector, a rubber core groove is provided inside the male connector, a plastic insulating head is butt-jointed to one side of the outer wall of the male pin, and the male pins are distributed at equal angles in the male connector.

[0007] Preferably, it includes a female connector, a female needle and a torsion spring leaf, wherein a rubber core rib is butted against one side of the inner wall of the female connector, and the inner walls of the female connector and the male connector are both connected to the front rubber core of the main body, and the outer wall of the front rubber core of the main body is connected to the pressure cover rubber core, the inside of the female needle is butted against a torsion spring leaf, and the middle parts of the outer walls of the female needle and the male needle are both sleeved with rubber rings, and the female needles are distributed at equal angles in the female connector.

[0008] Preferably, one side of the outer wall of the male needle is connected to the front rubber core of the main body, and the outer wall of the male needle is silver-plated.

[0009] Preferably, the outer wall of the female pin is silver-plated, and the torsion spring spring is silver-plated.

[0010] Preferably, one side of the outer wall of the female needle is connected to the front rubber core of the main body.

[0011] Compared with the prior art, the beneficial effect of the utility model is that when the 3-phase AC charging pile high-power quick plug is in use, the buried structure and the ground wire pin are guaranteed to contact the female connector first, so that people will not get electric shock when using it, and the equipment is safe, thereby playing a role in preventing electric shock. The rubber core ribs and the rubber core grooves cooperate with each other to achieve anti-misalignment positioning of the rubber core, and the front rubber core of the main body and the pressure cover rubber core ensure that there is an axial gap between the pin core, thereby ensuring good contact between the male pin and the female pin, reducing contact resistance, ensuring high-power charging of the charging pile, and effectively reducing temperature rise, so that when the 3-phase AC charging pile high-power quick plug is in use, it is easy to connect.

[0012] 1. During the use of the 3-phase AC charging pile, when a high-power quick plug is needed for assistance, after the male pin and the female pin are connected, the male pin and the torsion spring spring in the female pin are connected, and then the contact resistance is reduced through the torsion spring spring, and the conductivity is improved. The buried structure ensures that when the male connector contacts the female connector, the ground wire pin contacts the female connector first, and the male pin is connected with a plastic insulating head on one side to ensure that people will not get electric shock when using it, and the equipment is safe, so that when the high-power quick plug of the 3-phase AC charging pile is used, it plays a role in preventing electric shock;

[0013] 2. During the use of the 3-phase AC charging pile, when a high-power quick plug is needed for assistance, when the male pin and the female pin are connected, the front rubber core of the main body and the rubber core of the gland are clamped by screws to ensure that there is a gap in the axial direction of the pin core, ensuring that the male pin can move freely to find the concentricity when the female pin is inserted, and the rubber ring cooperates to ensure that the pin core can move freely to find the center, thereby ensuring good contact between the male pin and the female pin, reducing contact resistance, ensuring high-power charging of the charging pile, and effectively reducing temperature rise, so as to facilitate docking when the high-power quick plug of the 3-phase AC charging pile is used. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the explosion structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the main cutaway structure of the utility model;

[0016] Figure 3 This is a schematic diagram of the main structure of the steel ball guide ring of the utility model;

[0017] Figure 4 This is a schematic diagram of the utility model in a top view and cutaway structure;

[0018] Figure 5 This is a schematic diagram of the main structure of the male needle of the utility model;

[0019] Figure 6 This is a schematic diagram of the main structure of the female needle of the utility model;

[0020] Figure 7 This is a schematic diagram of the main cutaway structure of the male needle of the utility model;

[0021] Figure 8 This is a left-side structural schematic diagram of the rubber core tank of the utility model;

[0022] Fig. 9 This is a schematic diagram of the front cutaway structure of the male connector of the utility model;

[0023] Fig.10 This is a schematic diagram of the three-dimensional structure of the male connector of the utility model;

[0024] Fig.11 This is a schematic diagram of the main cutaway structure of the female needle of the utility model;

[0025] Fig.12 This is a right view of the structure of the torsion spring spring of the utility model;

[0026] Fig.13 This is a schematic diagram of the main cutaway structure of the female connector of the utility model;

[0027] Fig.14 This is a schematic diagram of the three-dimensional structure of the female connector of the utility model;

[0028] Fig.15 This is a schematic diagram of the three-dimensional structure of the torsion spring spring of the utility model;

[0029] Fig.16 It is a schematic diagram of the three-dimensional structure of the male needle of the utility model.

[0030] In the figure: 1. Male connector; 2. Female connector; 3. Male pin; 4. Female pin; 5. Steel ball guide ring; 6. Positioning steel ball; 7. Reset spring; 8. Circlip; 9. Rubber ring; 10. Gland rubber core; 11. Main body front rubber core; 12. Plastic insulating head; 13. Ground wire pin; 14. Rubber core rib; 15. Rubber core groove; 16. Torsion spring spring. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] See also Figure 1-Figure 16 The utility model provides a technical solution: a 3-phase AC charging pile high-power fast plug, including a male connector 1, a female connector 2 and a male pin 3, the male connector 1 is connected to the female connector 2 on one side of the outer wall, the male connector 1 is provided with a male pin 3, and the outer wall of the male pin 3 is connected to the female pin 4 on one side, and the outer wall of the female connector 2 is connected to a steel ball guide ring 5 on the side close to the male connector 1; the steel ball guide ring 5 is connected with a positioning steel ball 6 through a groove, and the inner wall of the steel ball guide ring 5 is connected with a reset spring 7; the outer wall of the reset spring 7 is connected with a retaining spring 8, and the outer wall of the male pin 3 is connected to a plastic insulating head 12; the inner center of the male connector 1 is connected with a ground wire pin 13, and the inner part of the female pin 4 is connected with a torsion spring shrapnel 16; the female pin 4 is arranged inside the female connector 2, the male pin 3 and the female pin 4 are both silver-plated, the torsion spring shrapnel 16 is silver-plated, the male pin 3 is distributed at equal angles in the male connector 1, and the female pin 4 is distributed at equal angles in the female connector 2.

[0033] In specific implementation, when a high-power quick plug is needed to assist in charging an electric vehicle during the use of a 3-phase AC charging pile, a torsion spring shrapnel 16 is provided inside the female pin 4. After the male pin 3 is docked with the female pin 4, the male pin 3 is docked with the torsion spring shrapnel 16 inside the female pin 4, and the torsion spring shrapnel 16 is silver-plated, thereby reducing the contact resistance through the torsion spring shrapnel 16, improving the conductivity, and improving the plugging and unplugging force through the torsion spring shrapnel 16;

[0034] The male pin 3 is buried in the male connector 1, the female pin 4 is buried in the female connector 2, and a ground pin 13 is arranged inside the male connector 1. When the male connector 1 contacts the female connector 2, the ground pin 13 is ensured to contact the female connector 2 first, and one side of the male pin 3 is docked with a plastic insulating head 12 for cooperation, to ensure that people will not get electric shock when using it, to ensure the safety of the equipment, and thus to play a role in preventing electric shock when using the high-power fast plug of the 3-phase AC charging pile.

[0035] See also Figure 4-Figure 13It can be seen that the inner walls of the male connector 1 and the female connector 2 are both connected to the main body front rubber core 11, and the outer wall of the main body front rubber core 11 is connected to the pressure cover rubber core 10; a rubber core rib 14 is connected to one side of the inner wall of the female connector 2, and a rubber core groove 15 connected to the rubber core rib 14 is opened inside the male connector 1; the middle part of the outer wall of the male needle 3 and the female needle 4 is sleeved with a rubber ring 9; the outer walls of the male needle 3 and the female needle 4 are both connected to the main body front rubber core 11.

[0036] In specific implementation, when a high-power fast plug is needed to assist in the use of a 3-phase AC charging pile, in order to charge an electric vehicle, the male connector 1 needs to be docked with the female connector 2. Since a rubber core groove 15 is provided inside the male connector 1, and a rubber core rib 14 is connected inside the female connector 2, the rubber core anti-foolproof positioning is achieved through the mutual cooperation between the rubber core rib 14 and the rubber core groove 15, which is simpler than the metal shell anti-foolproof structure;

[0037] When the male needle 3 and the female needle 4 are docked, the front rubber core 11 of the main body and the rubber core 10 of the gland are clamped by screw locking, and the shell structure is designed to ensure that there is a gap of 0.1mm-0.2mm in the axial direction of the needle core, so that the male needle 3 can move freely to find the concentricity when the female needle 4 is inserted, and the needle core and the rubber core have a clearance fit, which is stably fixed by the rubber ring 9, so that the axial clearance of the needle core can be accurately controlled, and the rubber ring 9 cooperates to ensure that the needle core can move freely to find the center, and then ensure the good fit of the male needle 3 and the female needle 4. Contact, reducing contact resistance, ensuring high-power charging of the charging pile, effectively reducing temperature rise, and the rubber ring 9 also has the function of waterproofing and improving plugging and extraction force, and the male pin 3 has three specifications of 34.5*5*3PCS, 38*6.6*1PC and 34.5*6.6*4PCS, all with plastic insulating heads 12, and the female pin 2 has two specifications of 40*5*3PCS and 40*6.6*5PC, so as to facilitate docking when the high-power quick plug of the 3-phase AC charging pile is used.

[0038] To sum up, when using this 3-phase AC charging pile high-power quick plug, first pull the wire to connect the male connector 1 with the female connector 2, then the male pin 3 is connected with the female pin 4, and then the power of the 3-phase AC charging pile is transmitted to the electric car. This is a prior art and will not be elaborated on here. Through the buried structure and ensuring that the ground wire pin 13 contacts the female connector 2 first, it is ensured that people will not get an electric shock when using it, and the safety of the equipment is ensured, thereby playing a role in preventing electric shock. Through the mutual cooperation of the rubber core rib 14 and the rubber core groove 15, the rubber core anti-fool positioning is achieved, and through the front rubber core 1 of the main body 1 and the gland rubber core 10 ensure that there is a gap in the axial direction of the needle core, thereby ensuring good contact between the male needle 3 and the female needle 4, reducing contact resistance, ensuring high-power charging of the charging pile, and effectively reducing temperature rise. The movement of the steel ball guide ring 5 drives the positioning steel ball 6 to move together until the positioning steel ball 6 slides into the groove, and the steel ball guide ring 5 squeezes the reset spring 7 and the retaining spring 8 to deform when it moves, and then the reset spring 7 and the retaining spring 8 are reset to assist the steel ball guide ring 5 to return to its position, thereby facilitating quick plugging and unplugging of the power plug. The contents not described in detail in this description belong to the prior art known to professional and technical personnel in this field.

[0039] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A three-phase AC charging pile high-power quick plug, comprising a male connector (1), a female connector (2) and a male pin (3), characterized in that: The outer wall of the male connector (1) is butted against a female connector (2), a male pin (3) is arranged inside the male connector (1), and a female pin (4) is connected to one side of the outer wall of the male pin (3), a steel ball guide ring (5) is butted against a side of the outer wall of the female connector (2) close to the male connector (1), and the steel ball guide ring (5) is connected to a retaining steel ball (6) via a groove, and a return spring (7) is connected to the inner wall of the steel ball guide ring (5), and a retaining spring (8) is connected to one side of the outer wall of the return spring (7).

2. A three-phase AC charging pile high-power fast plug according to claim 1, characterized in that: The invention comprises a male pin (3) and a ground pin (13); the ground pin (13) is connected to the center of the male connector (1), a rubber core groove (15) is provided inside the male connector (1), a plastic insulating head (12) is butt-jointed to one side of the outer wall of the male pin (3), and the male pins (3) are distributed at equal angles inside the male connector (1).

3. A three-phase AC charging pile high-power fast plug according to claim 1, characterized in that: The invention comprises a female pin (4) and a torsion spring leaf (16); a rubber core rib (14) is butted against one side of the inner wall of the female connector (2); the inner walls of the female connector (2) and the male connector (1) are both connected to a main body front rubber core (11); and the outer wall of the main body front rubber core (11) is connected to a pressure cover rubber core (10); the inner part of the female pin (4) is butted against a torsion spring leaf (16); the middle parts of the outer walls of the female pin (4) and the male pin (3) are both sleeved with a rubber ring (9); and the female pins (4) are distributed at equal angles in the female connector (2).

4. A three-phase AC charging pile high-power fast plug according to claim 3, characterized in that: One side of the outer wall of the male needle (3) is connected to the front rubber core (11) of the main body, and the outer wall of the male needle (3) is silver-plated.

5. A three-phase AC charging pile high-power fast plug according to claim 3, characterized in that: The outer wall of the female needle (4) is silver-plated, and the torsion spring spring (16) is silver-plated.

6. A three-phase AC charging pile high-power fast plug according to claim 3, characterized in that: One side of the outer wall of the female needle (4) is connected to the front rubber core (11) of the main body.