Charging gun plug structure

Abstract

The utility model discloses a charging gun plug structure, comprising a charging plug, a plurality of DC jack terminals and a mounting member, two ends of the plurality of DC jack terminals are respectively plugged with the charging plug and the mounting member; the two ends of the DC jack terminal are both of a jack structure, and a terminal limiting boss is formed outside the DC jack terminal. During operation, the mounting piece and the charging plug are fixed through the screw, so that the DC jack terminal is fixedly arranged between the charging plug and the mounting piece, and the mounting positions between the DC jack terminal and the charging plug and between the DC jack terminal and the mounting piece are limited through the terminal limiting boss. According to the utility model, the DC jack terminal is not directly fixed with the charging plug, so that the DC jack terminal can be replaced independently, and the cost is saved; and the two ends of the DC jack terminal are of jack structures, and safe and reliable mechanical and electrical connection is achieved through pin hole plug-in and split groove and ring spring contact modes, so that rapid disassembly and assembly are facilitated, and the replacement efficiency of the DC jack terminal is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of charging guns for new energy vehicles, in particular to a charging gun plug structure. Background Art

[0002] With the popularization of the use of new energy technologies, new energy vehicle charging guns have been widely used, but there are still some problems. For example, after the charging plug of the charging gun is used for a long time, the charging terminal inside the charging gun head is prone to plating loss or wear, and most of the existing charging terminals are fixed inside the charging gun, which means that when the charging terminal is damaged, the entire charging plug needs to be replaced, and the maintenance cost is high. If the charging terminal is removed from the charging gun, it will not only waste time, but also greatly reduce the service life of the charging gun. Utility Model Content

[0003] The purpose of the utility model is to provide a charging gun plug structure to solve the technical problems mentioned in the prior art that the charging terminal is fixed inside the charging gun, resulting in high cost for replacing the charging terminal.

[0004] The utility model solves the above problems through the following technical solutions:

[0005] A charging gun plug structure comprises a charging plug, a plurality of DC jack terminals and a mounting piece, wherein two ends of the plurality of DC jack terminals are respectively plugged into the charging plug and the mounting piece; both ends of the DC jack terminal are jack structures, and a terminal limiting boss is formed outside the DC jack terminal; during operation, the mounting piece is fixed to the charging plug by screws, so that the DC jack terminal is fixedly arranged between the charging plug and the mounting piece, and the installation position between the DC jack terminal and the charging plug and the mounting piece is limited by the terminal limiting boss.

[0006] As a further improvement of the present invention, the jack structures at both ends of the DC jack terminal are respectively a vehicle seat end contact area connected to the vehicle seat end and a gun internal pin contact area for connecting to the gun internal pin; the external structure of the vehicle seat end contact area is a split groove, and the internal structure of the gun internal pin contact area is a ring spring.

[0007] As a further improvement of the utility model, a terminal through hole and a plurality of screw holes are formed on the charging plug, the vehicle seat end contact area is inserted and installed in the terminal through hole, and the freedom of the DC jack terminal in the circumferential direction is constrained by the terminal through hole; a plug limiting portion is formed at one end of the terminal through hole close to the DC jack terminal, and the plug limiting portion cooperates with the terminal limiting boss.

[0008] As a further improvement of the present invention, the DC jack terminal is gap-matched with the terminal through hole of the charging plug.

[0009] As a further improvement of the present invention, a socket limiting hole is formed on the mounting member, and the pin contact area in the gun is inserted into the socket limiting hole.

[0010] As a further improvement of the present invention, the charging gun plug structure also includes a sealing ring. A charging plug groove for installing the sealing ring is formed on the outside of one end of the charging plug close to the DC jack terminal, and the connection between the charging plug and the charging gun body is sealed by the sealing ring.

[0011] As a further improvement of the present invention, the sealing ring is circumferentially provided with a lip which is interference fit with the charging gun body, and a seal is formed by squeezing the lip with the charging gun body.

[0012] As a further improvement of the present invention, the charging plug and the charging gun body are locked by a sealing screw.

[0013] As a further improvement of the present invention, an O-ring is provided between the terminal through hole of the charging plug near the plug limiting portion and the DC jack terminal.

[0014] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0015] (1) The DC jack terminal of the utility model is not directly fixed to the charging plug. Instead, the DC jack terminal is first placed in the charging plug, and then pressed and installed on the charging plug with a mounting piece. Then, a sealing ring is assembled around the charging plug to make a radial seal. By turning the screw to remove the mounting piece from the charging plug, the DC jack terminal can be replaced separately, which saves costs.

[0016] (2) Both ends of the DC jack terminal of the utility model are jack structures, one end is connected to the vehicle seat end, and the other end is in contact with the pin in the gun; and through the pinhole insertion, split groove and ring spring contact, a safe and reliable mechanical and electrical connection is achieved, which is convenient for quick disassembly and assembly, and improves the replacement efficiency of the DC jack terminal. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is an exploded schematic diagram of a charging gun plug structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the assembly of the charging gun plug structure and the charging gun body of the utility model;

[0019] Figure 3 It is a cross-sectional schematic diagram of the contact portion between the DC jack terminal of the utility model and the pin inside the gun.

[0020] Reference numerals:

[0021] 1. Charging plug; 11. Terminal through hole; 12. Plug limiter; 13. Groove; 2. DC jack terminal; 21. Terminal limiter boss; 22. Vehicle seat end contact area; 23. Gun internal pin contact area; 3. Mounting parts; 31. Jack limiter hole; 4. Sealing ring; 5. Screw; 6. Gun internal pin; 7. Charging gun body; 8. Sealing screw; 9. O-ring. DETAILED DESCRIPTION

[0022] 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.

[0023] Example

[0024] Combined with Figure 1-3 As shown, a charging gun plug structure includes a charging plug 1, two DC jack terminals 2 and a mounting member 3, wherein the two ends of the DC jack terminal 2 are respectively plugged with the charging plug 1 and the mounting member 3; both ends of the DC jack terminal are jack structures, and a terminal limiting boss 21 is formed on the outside of the DC jack terminal 2. During operation, the mounting member 3 is fixed to the charging plug 1 by screws, so that the DC jack terminal is fixedly set between the charging plug 1 and the mounting member 3, and the installation position between the DC jack terminal and the charging plug and the mounting member is limited by the terminal limiting boss 21. The jack structures at both ends of the DC jack terminal are respectively a vehicle seat end contact area 22 and a gun internal pin contact area 23; the vehicle seat end contact area 22 is connected to the vehicle seat end, and the gun internal pin contact area 23 is in contact with the gun internal pin 6, and is connected to the gun internal pin 6 through pinhole plugging, so as to achieve a safe and reliable mechanical and electrical connection, which is convenient for quick disassembly and assembly.

[0025] The charging plug 1 is provided with two terminal through holes 11 perpendicular to the bottom surface and a plurality of screw holes. A plug limiting portion 12 is formed at one end of the two terminal through holes 11 near the DC jack terminal 2. The vehicle seat end contact area 22 of the DC jack terminal 2 is inserted and installed in the terminal through holes 11, and is matched with the plug limiting portion 12 to constrain the freedom of the DC jack terminal in the circumferential direction; the terminal limiting boss 21 cooperates with the plug limiting portion 12, and the depth of the DC jack terminal inserted into the charging plug is constrained by the terminal limiting boss 21; a jack limiting hole 31 is provided on the mounting member 3, so that the gun inner pin contact area 23 of the DC jack terminal 2 is inserted into the jack limiting hole 31; the screw 5 cooperates with the screw hole on the charging plug 1 to fix the mounting member 3 to the charging plug 1 and press the DC jack terminal 2 tightly.

[0026] Furthermore, a charging plug groove 13 is formed outside the end of the charging plug 1 near the DC jack terminal 2, and the sealing ring 4 is installed in the charging plug groove 13. The sealing ring 4 is designed with lips that are interference fit with the charging gun body 7 around it, and a radial seal is formed by squeezing the lips with the charging gun body 7. Specifically, the structure of the lip is that the outer diameter of the ends of the sealing ring is greater than the outer diameter of the middle part of the sealing ring, so that the outer periphery of the sealing ring forms an inverted U-shaped structure facing outward, and the design of the lip can increase the extrusion range of the sealing ring, thereby improving the extrusion sealing performance of the sealing ring.

[0027] In this embodiment, the charging plug 1 has five evenly distributed screw holes, three of which are fixed to the mounting member 3 by screws; the remaining two screw holes are locked to the charging gun body 7 by sealing screws 8, and the strength is reliable.

[0028] Preferably, the DC jack terminal 2 and the charging plug terminal through hole 11 are gap-matched to ensure that there is a certain tolerance when the DC jack terminal 2 contacts the seat end and the gun internal pin 6. The gun internal pin contact area 23 passes through the jack limit hole 31 and is connected to the gun internal pin 6. A groove for installing an O-ring 9 is provided on the outside of the DC jack terminal 2 near the terminal limit boss 21, and a radial seal is formed by squeezing the O-ring 9 and the terminal through hole 11. The end face radius of the vehicle seat end contact area 22 gradually decreases toward one end of the charging plug 1, thereby forming a bell-mouth structure; the end face radius of the gun internal pin contact area 23 gradually decreases toward one end of the mounting part 3, thereby forming a bell-mouth structure. The bell-mouth structure is used as a guide for contact during insertion. The guide and tolerance design ensure that the pinhole insertion is accurate and the operation is convenient.

[0029] In this embodiment, the outer structure of the contact area of ​​the vehicle seat end where the DC jack terminal is connected to the DC jack is designed as a split groove, and the inner structure of the contact area of ​​the gun inner pin is designed as a ring spring.

[0030] The DC jack terminal 2 of the utility model is not directly fixed to the charging plug 1. Instead, the DC jack terminal is first placed in the charging plug and is pressed and installed on the charging plug 1 by a mounting piece. The sealing ring is assembled around the charging plug to make a radial seal. Both ends of the DC jack terminal are jack structures, one end is connected to the vehicle seat end, and the other end is in contact with the pin in the gun. The mounting piece can be removed from the charging plug 1 by turning the screw, so that the DC jack terminal 2 can be replaced separately, which saves costs. In addition, a safe and reliable mechanical and electrical connection is achieved by means of pinhole insertion, split groove and ring spring contact, which is convenient for quick disassembly and assembly, and improves the replacement efficiency of the DC jack terminal, thereby extending the life of the charging gun.

[0031] Although the present invention is described herein with reference to the illustrative embodiments of the present invention, the above embodiments are merely preferred embodiments of the present invention, and the embodiments of the present invention are not limited to the above embodiments. It should be understood that those skilled in the art can design many other modifications and implementations, which will fall within the scope and spirit of the principles disclosed in this application.

Claims

1. A charging gun plug structure, characterized in that: It includes a charging plug, a plurality of DC jack terminals and a mounting piece, wherein both ends of the DC jack terminal are respectively plugged into the charging plug and the mounting piece; both ends of the DC jack terminal are jack structures, and a terminal limiting boss is formed outside the DC jack terminal; during operation, the mounting piece is fixed to the charging plug by screws, so that the DC jack terminal is fixedly arranged between the charging plug and the mounting piece, and the installation position between the DC jack terminal and the charging plug and the mounting piece is limited by the terminal limiting boss.

2. According to claim 1, a charging gun plug structure is characterized in that: The jack structures at both ends of the DC jack terminal are respectively a vehicle seat end contact area connected to the vehicle seat end and a gun internal pin contact area for connecting to the gun internal pin; the outer structure of the vehicle seat end contact area is a split groove, and the inner structure of the gun internal pin contact area is a ring spring.

3. According to claim 2, a charging gun plug structure is characterized in that: The charging plug is formed with a terminal through hole and a plurality of screw holes, the vehicle seat end contact area is inserted and installed in the terminal through hole, and the freedom of the DC jack terminal in the circumferential direction is constrained by the terminal through hole; a plug limiting portion is formed at one end of the terminal through hole close to the DC jack terminal, and the plug limiting portion cooperates with the terminal limiting boss.

4. According to claim 3, a charging gun plug structure is characterized in that: The DC jack terminal is gap-matched with the terminal through hole of the charging plug.

5. A charging gun plug structure according to claim 2, characterized in that: A socket limiting hole is formed on the mounting piece, and the pin contact area in the gun is inserted into the socket limiting hole.

6. A charging gun plug structure according to claim 2, characterized in that: The charging gun plug structure also includes a sealing ring. A charging plug groove for installing the sealing ring is formed outside one end of the charging plug close to the DC jack terminal, and the connection between the charging plug and the charging gun body is sealed by the sealing ring.

7. A charging gun plug structure according to claim 6, characterized in that: The sealing ring is circumferentially provided with a lip which is interference-fitted with the charging gun body, and a seal is formed by squeezing the lip with the charging gun body.

8. A charging gun plug structure according to claim 6, characterized in that: The charging plug and the charging gun body are locked by a sealing screw.

9. A charging gun plug structure according to claim 6, characterized in that: An O-ring is arranged between the terminal through hole of the charging plug near the plug limiting portion and the DC jack terminal.

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