A liquid-cooled charging gun and the gun head therein

Abstract

The present invention discloses a liquid-cooled charging gun and a gun head therein. The gun head includes: a gun head seat, a split-type terminal mounting skeleton, a PE terminal, two power terminals, and a plurality of signal terminals. The signal terminal and the PE terminal both include, from front to back: a contact section and a terminal mounting section thicker than the contact section; the power terminal includes, from front to back: a contact section, a terminal mounting section thicker than the contact section, and a rear mounting section thicker than the terminal mounting section. The split-type terminal mounting skeleton includes: a card slot type mounting support, and a perforated mounting support mounted on the card slot type mounting support. A terminal connection channel is provided on the perforated mounting support; the signal terminal and the PE terminal are snap-fitted on the card slot type mounting support, and the power terminal passes through the perforated mounting support and is fixed by a snap spring. The gun head of the present invention is mainly used in a high-power liquid-cooled charging gun.

Description

Technical Field

[0001] The present invention relates to a charging gun for an electric vehicle, and particularly to a liquid-cooled charging gun and a gun head therein. Background Art

[0002] At present, the structure of a traditional charging gun generally includes: a housing, and a gun head seat provided at the front end of the housing. A terminal mounting skeleton is provided in the gun head seat, and all power terminals and signal terminals are inserted through the terminal mounting skeleton. In this way, during the installation process of the charging gun, both the signal terminals and the power terminals need to be pre-inserted through the terminal mounting skeleton and then the corresponding wires are connected thereto by means of crimping or welding, making the installation of the terminals rather troublesome; moreover, the crimping or welding of the terminals and the wires can only be manually operated, greatly affecting the assembly efficiency and increasing the labor cost. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a gun head in a liquid-cooled charging gun of a charging gun with terminals that can be installed with wires.

[0004] To solve the above technical problems, the technical solution adopted by the present invention is as follows: A gun head in a liquid-cooled charging gun, the structure of which includes: a gun head seat, a split-type terminal mounting skeleton, a PE terminal, two power terminals, and several signal terminals. The signal terminals, PE terminal, and power terminals are all in a stepped shape. The PE terminal and signal terminals each include, from front to back: a contact section and a terminal mounting section that is thicker than the contact section. The power terminal includes, from front to back: a contact section, a terminal mounting section that is thicker than the contact section, and a rear mounting section that is thicker than the terminal mounting section. On the front end face of the gun head seat, there are terminal insertion holes corresponding one-to-one to the power terminals, PE terminal, and signal terminals. On the bottom wall of the terminal insertion holes, there are terminal mounting holes that cooperate with the contact sections of the corresponding power terminals, PE terminal, or signal terminals. The split-type terminal mounting skeleton includes: a card slot type mounting support, and a perforated type mounting support mounted on the card slot type mounting support. There is a terminal connection channel provided on the perforated type mounting support. At the rear of the gun head seat, there is an installation chamber for installing the card slot type mounting support and the perforated type mounting support, and terminal placement holes corresponding one-to-one to the terminal mounting sections of all power terminals, PE terminal, and signal terminals. On the card slot type mounting support, there are card slots corresponding one-to-one to the signal terminals and PE terminal. At the front end of the card slot, there is a positioning boss. On the terminal mounting sections of the signal terminals and PE terminal, there are an annular sealing groove and an annular card slot provided from front to back. The terminal mounting sections of the signal terminals and PE terminal are clamped in the corresponding card slots on the card slot type mounting support. Moreover, the annular card slots on the terminal mounting sections of the signal terminals and PE terminal are clamped on the positioning bosses of the corresponding card slots. After the terminal mounting sections of the signal terminals and PE terminal are sleeved with sealing rings in their annular sealing grooves, they are inserted into the corresponding terminal placement holes. The contact sections of the signal terminals and PE terminal pass through the corresponding terminal mounting holes and extend into the corresponding terminal insertion holes. In the perforated type mounting support, there is a power terminal mounting through hole corresponding to the terminal mounting section of the power terminal and communicating with the power terminal mounting through hole. The aperture of the power terminal mounting through hole is smaller than the aperture of the power terminal through hole, so that the power terminal mounting through hole and the power terminal through hole form a stepped hole.

[0005] As a preferred solution, in the gun head of the liquid-cooled charging gun, in the perforated type mounting support, there is also a power terminal through hole corresponding to the rear mounting section of the power terminal and communicating with the power terminal mounting through hole. The aperture of the power terminal mounting through hole is smaller than the aperture of the power terminal through hole, so that the power terminal mounting through hole and the power terminal through hole form a stepped hole.

[0006] As a preferred solution, in the gun head of the liquid-cooled charging gun, the specific installation method of the slot-type mounting seat and the perforated mounting seat is as follows: at least two positioning holes are provided on the rear end face of the slot-type mounting seat, and positioning columns corresponding one-to-one to the positioning holes on the mounting seat are provided on the perforated mounting seat.

[0007] As a preferred solution, in the gun head of the liquid-cooled charging gun, the positioning column is in a "cross" shape.

[0008] As a preferred solution, in the gun head of the liquid-cooled charging gun, an annular mounting boss is further provided on the gun head seat, at least two mounting through holes are provided along the circumferential direction on the annular mounting boss, mounting fixing holes corresponding one-to-one to the mounting through holes are provided on the perforated mounting seat, and a screw is selected to pass through the mounting through holes on the annular mounting boss of the gun head seat and be tightened in the mounting fixing holes on the perforated mounting seat.

[0009] The present invention also provides a liquid-cooled charging gun, including: a housing, and a handle provided on the housing, and the gun head described in the present invention is provided at the front end of the housing.

[0010] The beneficial effects of the present invention are: by setting the terminal mounting skeleton into a split structure, arranging a terminal connection wire channel on the perforated mounting seat, adopting a snap-fit structure between the signal terminal and the PE terminal and the slot-type mounting seat, and adopting a structure of post-inserting and adding a circlip between the power terminal and the perforated mounting seat, the terminal with wire installation is realized, so that wires can be pre-connected to the terminals, which greatly facilitates the installation of the terminals. More importantly, the connection of the terminals can be automated, which can further reduce the labor cost, reduce the labor intensity of the operators, improve the working environment, and be beneficial to the physical health of the operators. Description of the Drawings

[0011] Figure 1 is a schematic structural diagram of the liquid-cooled charging gun described in the present invention.

[0012] Figure 2 is an exploded structural diagram of the liquid-cooled charging gun described in the present invention.

[0013] Figure 3 is a schematic installation structural diagram of the signal terminal described in the present invention.

[0014] Figure 4 is a schematic installation structural diagram of the power terminal described in the present invention.

[0015] Figure 5 is a three-dimensional structural diagram of the slot-type mounting seat.

[0016] Figure 6 It is a schematic three-dimensional structure diagram of a perforated mounting support.

[0017] Figure 7 It is a partial exploded structure diagram of the gun head in the liquid-cooled charging gun of the present invention.

[0018] Figures 1 to 7 The reference numerals in it are respectively: 1, gun head; 11, signal terminal; 111, contact section; 112, terminal mounting section; 1121, annular clamping groove; 115, sealing ring; 12, power terminal; 121, contact section; 122, terminal mounting section; 1221, annular clamping groove; 123, rear mounting section; 125, sealing ring; 13, PE terminal; 131, contact section; 132, terminal mounting section; 1321, annular clamping groove; 135, sealing ring; 20, gun head seat; 200, annular mounting boss; 201, terminal insertion hole; 202, terminal insertion hole; 203, terminal insertion hole; 21, card slot type mounting support; 211, power terminal through hole; 212, card slot; 2121, positioning boss; 22, perforated mounting support; 220, mounting and fixing hole; 221, power terminal mounting through hole; 222, "cross"-shaped positioning post; 223, terminal connection channel; 224, surrounding edge; 225, snap ring; 91, housing; 93, handle. Detailed implementation manners

[0019] The following combines with the attached Figures 1 to 7 drawings to describe in detail the specific implementation schemes of the liquid-cooled charging gun and the gun head therein of the present invention.

[0020] Such as Figure 1 、 Figure 2As shown, the gun head 1 in a liquid-cooled charging gun according to the present invention has a structure including: a gun head seat 20, a split terminal mounting skeleton, a PE terminal 13, two power terminals 12, and six signal terminals 11. The signal terminals 11, the PE terminal 13, and the power terminals 12 are all in a stepped shape. The signal terminal 11 includes, from front to back: a contact section 111 and a terminal mounting section 112 that is thicker than the contact section 111 (the specific structure of the signal terminal 11 belongs to the conventional technology in the art and will not be described in detail here); the power terminal 12 includes: a contact section 121, a terminal mounting section 122 that is thicker than the contact section 121, and a rear mounting section 123 that is thicker than the terminal mounting section 122 (the specific structure of the power terminal 12 belongs to the conventional technology in the art and will not be described in detail here); the PE terminal 13 includes, from front to back: a contact section 131 and a terminal mounting section 132 that is thicker than the contact section 131 (the specific structure of the PE terminal 13 belongs to the conventional technology in the art and will not be described in detail here); on the front end face of the gun head seat 20, there are respectively provided terminal insertion holes 202 corresponding to the power terminals 12 one by one, a terminal insertion hole 203 corresponding to the PE terminal 13, and terminal insertion holes 201 corresponding to the signal terminals 11 one by one. On the bottom wall of the terminal insertion hole 201, there are respectively provided terminal mounting holes that cooperate with the corresponding signal terminals 11. On the bottom wall of the terminal insertion hole 202, there is provided a terminal mounting hole that cooperates with the corresponding power terminal 12. On the bottom wall of the terminal insertion hole 203, there is provided a terminal mounting hole that cooperates with the PE terminal 13; the split terminal mounting skeleton includes: a card slot type mounting support 21 and a perforated type mounting support 22 mounted on the card slot type mounting support 21. On the perforated type mounting support 22, there is provided a terminal connection channel 223 (see Figure 7 shown), on the card slot type mounting support 21, there is provided a power terminal through hole 211 for passing through the power terminals 12 (see Figure 3 and Figure 5 shown). The specific installation method of the card slot type mounting support 21 and the perforated type mounting support 22 is: on the rear end face of the card slot type mounting support 21, there are provided four positioning holes (belonging to the conventional technology in the art and not shown in the figure), and on the perforated type mounting support 22, there are provided "cross"-shaped positioning posts 222 corresponding to the positioning holes on the mounting support 21 one by one (see Figure 4 , Figure 6As shown); at the rear of the gun head seat 20, there is an installation chamber for installing the card slot type installation support 21 and the perforated type installation support 22, as well as terminal placement holes corresponding one-to-one to the terminal installation sections 122 of all power terminals 12, the terminal installation section 132 of the PE terminal 13, and the terminal installation section 112 of the signal terminal 11. On the card slot type installation support 21, there are card slots 212 corresponding one-to-one to the signal terminal 11 and the PE terminal 13. At the front end of the card slot 212, there is a positioning boss 2121. The terminal installation section 122 of the signal terminal 11 is provided with an annular card slot 1121 and an annular sealing groove from front to back. In the annular sealing groove of the signal terminal 11, there is a sealing ring 125; on the terminal installation section 132 of the PE terminal 13, there are an annular card slot 1321 and an annular sealing groove from front to back. In the annular sealing groove of the PE terminal 13, there is a sealing ring 135. The terminal installation section 112 of the signal terminal 11 and the terminal installation section 132 of the PE terminal 13 are clamped in the corresponding card slots 212 on the card slot type installation support 21. Moreover, the annular card slot 1121 on the terminal installation section 112 of the signal terminal 11 and the annular card slot 1321 on the terminal installation section 132 of the PE terminal 13 are clamped on the positioning boss 2121 of the corresponding card slot 212. The terminal installation section 122 of the signal terminal 11 with the sealing ring 115 sleeved thereon and the terminal installation section 132 of the PE terminal 13 with the sealing ring 135 sleeved thereon are inserted into the corresponding terminal placement holes. The contact section 111 of the signal terminal 11 passes through the corresponding terminal installation hole and extends into the corresponding terminal insertion hole 201. The contact section 131 of the PE terminal 13 passes through the corresponding terminal installation hole and extends into the terminal insertion hole 203; in the perforated type installation support 22, there are power terminal installation through holes 221 corresponding to the terminal installation sections 122 of the power terminals 12 and power terminal through holes corresponding to the rear installation sections 123 of the power terminals 12. The power terminal installation through holes 221 are connected to the power terminal through holes to form stepped holes. On the terminal installation section 122 of the power terminal 12, there are an annular sealing groove and an annular card slot 1221 from front to back. After the terminal installation section 122 of the power terminal 12 passes through the corresponding power terminal installation through hole 221, a snap ring 225 is clamped on its annular card slot 1221. The rear installation section 123 of the power terminal 12 abuts against the perforated type installation support 22. After the terminal installation section 122 of the power terminal 12 is sleeved with the sealing ring 125 in its annular sealing groove, it is arranged in the corresponding terminal placement hole. The contact section 121 of the power terminal 12 passes through the corresponding terminal placement hole and extends into the corresponding terminal insertion hole 202.The described gun head seat 20 is further provided with an annular mounting boss 200. Four mounting through holes are circumferentially formed on the annular mounting boss 200. The perforated mounting support 22 is provided with mounting and fixing holes 220 corresponding one-to-one to the mounting through holes on the annular mounting boss 200 of the gun head seat 20. Select a screw to pass through the mounting through holes on the annular mounting boss 200 of the gun head seat 20 and tighten it in the mounting and fixing holes 220 on the perforated mounting support 22.

[0021] During actual application, on the outer side of the power terminal mounting through hole 221 of the perforated mounting support 22, a surrounding edge 224 that cooperates with the snap ring 225 is disposed back to back. The surrounding edge 224 is further provided with notches that cooperate with the two end portions of the snap ring 225. The rear mounting section 123 of the power terminal 12 is used for mounting a cooling channel (which is a conventional technique in the art and will not be described in detail here).

[0022] The liquid-cooled charging gun of the present invention includes: a housing 91, and a handle 93 disposed on the housing 91. The front end of the housing 91 is provided with the gun head 1 of the present invention.

[0023] The installation process of the present invention is as follows: First, connect the wire to the corresponding signal terminal 11, power terminal 12, and PE terminal 13. Then, directly snap the signal terminal 11 and the PE terminal 13 into the card slots 212 of the card slot type mounting support 21, pass the power terminal 12 through the power terminal mounting through hole 221 of the perforated mounting support 22, and use the snap ring 225 to fix the power terminal 12 on the perforated mounting support 22.

[0024] In summary, the above are only the preferred embodiments of the present invention, and are not used to limit the scope of implementation of the present invention. Any equivalent changes and modifications made to the shape, structure, features, and spirit described in the claims of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A gun head in a liquid-cooled charging gun, comprising: A gun head base, a PE terminal, two power terminals and several signal terminals. The signal terminals, the PE terminal and the power terminals are all in a stepped shape. The PE terminal and the signal terminals each include, from front to back: a contact section, and a terminal mounting section thicker than the contact section. The power terminal includes, from front to back: a contact section, a terminal mounting section thicker than the contact section, and a rear mounting section thicker than the terminal mounting section. On the front end face of the gun head base, there are terminal insertion holes corresponding one by one to the power terminals, the PE terminal and the signal terminals. On the bottom wall of the terminal insertion holes, there are terminal mounting holes adapted to the contact sections of the corresponding power terminals, PE terminal or signal terminals. It is characterized in that the charging gun head further includes: a split-type terminal mounting skeleton, which includes: a card slot type mounting support, and a perforated type mounting support mounted on the card slot type mounting support. A terminal connection channel is provided on the perforated type mounting support. At the rear of the gun head base, there is an installation chamber for installing the card slot type mounting support and the perforated type mounting support, and terminal placement holes corresponding one by one to the terminal mounting sections of all the power terminals, the PE terminal and the signal terminals. On the card slot type mounting support, there are card slots corresponding one by one to the signal terminals and the PE terminal. At the front end of the card slot, there is a positioning boss. On the terminal mounting sections of the signal terminals and the PE terminal, there are annular sealing grooves and annular card slots from front to back. The terminal mounting sections of the signal terminals and the PE terminal are clamped in the corresponding card slots on the card slot type mounting support. And, the annular card slots on the terminal mounting sections of the signal terminals and the PE terminal are clamped on the positioning bosses of the corresponding card slots. After the terminal mounting sections of the signal terminals and the PE terminal are sleeved with sealing rings in their annular sealing grooves, they are inserted into the corresponding terminal placement holes. The contact sections of the signal terminals and the PE terminal pass through the corresponding terminal mounting holes and extend into the corresponding terminal insertion holes. In the perforated type mounting support, there is a power terminal mounting through hole corresponding to the terminal mounting section of the power terminal. On the terminal mounting section of the power terminal, there are annular sealing grooves and annular card slots from front to back. After the terminal mounting section of the power terminal passes through the corresponding terminal mounting through hole, a snap ring is clamped on its annular card slot. The rear mounting section of the power terminal abuts against the perforated type mounting support. After the terminal mounting section of the power terminal is sleeved with a sealing ring in its annular sealing groove, it is arranged in the corresponding terminal placement hole. The contact section of the power terminal passes through the corresponding terminal mounting hole and extends into the corresponding terminal insertion hole. In the perforated type mounting support, there is also a power terminal through hole corresponding to the rear mounting section of the power terminal and communicating with the power terminal mounting through hole. The aperture of the power terminal mounting through hole is smaller than the aperture of the power terminal through hole, so that the power terminal mounting through hole and the power terminal through hole form a stepped hole;The specific installation methods of the described clamping groove type mounting support and the perforated type mounting support are as follows: at least two positioning holes are provided on the rear end face of the described clamping groove type mounting support, and positioning columns corresponding to the positioning holes on the mounting support are provided on the perforated type mounting support.; 2. The gun head in a liquid-cooled charging gun according to claim 1, characterized in that, The gun head seat is further provided with an annular mounting boss, and at least two mounting through holes are circumferentially formed in the annular mounting boss. Mounting fixing holes corresponding to the mounting through holes one by one are formed in the perforated mounting support. A screw is selected to pass through the mounting through holes in the annular mounting boss of the gun head seat and is tightened in the mounting fixing holes on the perforated mounting support.

3. A liquid-cooled charging gun, comprising: A housing and a handle provided on the housing, characterized in that a gun head according to claim 1 or 2 is provided at the front end of the housing.

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