A DC charging socket with quick-change terminals

Abstract

The present invention relates to a DC charging socket with quick-change terminals, which belongs to the technical field of charging sockets. The socket comprises a socket body, an end cover on one side of the socket body, a terminal gland, a cable sealing pad and a tail cover. A PE terminal, a low-voltage terminal and a quick-change terminal are installed in the socket body and fixed by the terminal gland and self-tapping bolts. The present invention adopts a structure in which the terminal gland cooperates with the socket body to realize the constraint on the terminal displacement, while reducing the overall volume of the socket, and can meet the installation requirements of most vehicles; the quick-change terminal sleeve structure adopts an embedded double spring design, and the sleeve and the spring are used as an independent unit, which is convenient for overall replacement and has more stable performance; further, the terminal protection cover adopts a snap-on locking device to avoid damage to the structure during disassembly, and at the same time, a secondary rotation locking device is added to enhance the structural reliability; the terminal protection cover is located at the outer ring of the top of the terminal and does not affect the terminal position.

Description

Technical Field

[0001] The present invention relates to the technical field of charging sockets, and in particular to a DC charging socket with quick-change terminals. Background Art

[0002] With the rapid development of new energy vehicle technology, the requirements for fast charging are also increasing. The DC charging socket is connected to the charging gun, which can provide fast charging services for electric vehicles, meeting the needs of electric vehicle users for charging speed, and is currently widely used in various types of electric vehicles. During the use of the charging socket, dust and impurities in the environment enter the socket terminals, increasing friction during the plugging and unplugging process, causing damage to the socket terminals in the long run, posing a great safety hazard. At this time, the socket needs to be replaced in time. Replacing the entire socket is costly, and the remaining charging socket components have a longer service life and are less prone to damage. Replacing the entire socket will cause unnecessary waste. Replacing the damaged terminals separately can reduce maintenance costs.

[0003] The existing charging socket capable of realizing quick terminal replacement realizes separate replacement of the DC+ / - terminal socket by separating the DC charging socket outer shell, the DC+ / - terminal socket and the DC+ / - terminal wiring terminal.

[0004] 1. The structure of the DC+ / - quick-change terminal in the prior art is relatively complicated, resulting in a large size of the charging socket;

[0005] 2. The socket is connected to the terminal through a reed, which is located at the terminal. If the reed at the terminal is damaged, the entire socket needs to be replaced;

[0006] 3. The size of the reed at the connection terminal and the socket is small, and the current carrying capacity is poor, which cannot meet the demand for high current charging;

[0007] 4. When replacing the terminal, the external shell structure of the socket needs to be replaced at the same time. The replacement area of ​​the socket shell will have a certain impact on the terminal position;

[0008] 5. The process of replacing the terminal is complicated and many parts need to be disassembled and assembled. Summary of the invention

[0009] The present invention aims to solve the above technical problems and provides a DC charging socket with quick-change terminals.

[0010] In order to solve the above technical problems, the technical solution provided by the present invention is:

[0011] A DC charging socket with quick-change terminals, comprising a socket body, an end cover on one side of the socket body, a terminal gland, a cable sealing pad and a tail cover;

[0012] A DC terminal limiting column is installed in the socket body, and a DC terminal protection cover is installed on the DC terminal limiting column;

[0013] The cable sealing gasket and tail cover are installed at the rear of the socket, and the tail cover is fixed to the socket body by a buckle;

[0014] The socket body is equipped with a PE terminal, a low-voltage terminal and a quick-change terminal, and is fixed by a terminal gland and self-tapping bolts.

[0015] Preferably, the terminal gland includes a gland body, on which PE terminal and low-voltage terminal slots for mounting the PE terminal and the low-voltage terminal are provided, and on which quick-change terminal limiting holes for mounting the quick-change terminal are provided.

[0016] Preferably, the quick-change terminal comprises a socket, in which springs are relatively installed, the lower end of the socket is connected to a wiring terminal and one end of the wiring terminal is inserted into the socket, and the wiring terminal and the socket are connected by bolts and spring washers.

[0017] Preferably, a limiting step is provided on the outer side of the wiring terminal, which cooperates with the limiting hole of the terminal gland to realize the constraint of the axial and circumferential displacement of the wiring terminal.

[0018] Preferably, a sealing ring for sealing is installed in the contact area between the wiring terminal and the socket body.

[0019] Preferably, two groups of buckle stop columns are installed on the DC terminal limit column, two groups of limit convex ribs are installed on the outer side of the DC terminal limit column, and a pressing groove and a locking groove are provided on the DC terminal limit column.

[0020] Preferably, a push switch is installed on the DC terminal protection cover, a buckle inserted into a card slot is installed on the push switch, a rib groove used in conjunction with a limiting rib is installed in the DC terminal protection cover, and a schematic mark is provided on the front of the DC terminal protection cover.

[0021] After adopting the above structure, the present invention has the following advantages:

[0022] The present invention adopts a structure in which the terminal pressure cover cooperates with the socket body to realize the constraint on the terminal displacement, while reducing the overall volume of the socket, which can meet the installation requirements of most vehicles; the quick-change terminal sleeve structure adopts an embedded double spring design, and the sleeve and the spring are an independent unit, which is convenient for overall replacement and has more stable performance; at the same time, the selected spring current carrying capacity can reach 380A, which meets the high current requirements of fast charging; further, the terminal protection cover adopts a snap-on locking device to avoid damage to the structure during disassembly, and at the same time adds a secondary rotating locking device to enhance the structural reliability; the terminal protection cover is located at the top outer circle of the terminal and does not affect the terminal position.

[0023] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present invention will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is an exploded view of the present invention.

[0026] Figure 2 It is a schematic diagram of the internal structure of the present invention;

[0027] Figure 3 It is a schematic diagram of the quick-change terminal structure of the present invention;

[0028] Figure 4 It is a schematic diagram of the connection between the quick-change terminal and the wiring terminal of the present invention;

[0029] Figure 5 It is a schematic structural diagram of the terminal gland of the present invention;

[0030] Figure 6 It is a structural schematic diagram of the socket body of the present invention;

[0031] Figure 7 is a front view of a DC terminal protection cover of the present invention;

[0032] Figure 8 It is a schematic structural diagram of a DC terminal protection cover of the present invention.

[0033] As shown in the figure: 1. End cover; 2. Socket body; 201. Buckle stop column; 202. Limiting convex rib; 203. Pressing groove; 204. Slot; 3. DC terminal protection cover; 301. Press switch; 302. Schematic mark; 303. Buckle; 304. Concave rib groove; 4. PE terminal and low-voltage terminal; 5. Self-tapping bolt; 6. Temperature sensor; 7. PCBA assembly; 8. Quick-change terminal; 801. Plug sleeve; 802. Spring; 803. Bolt; 804. Spring washer; 805. Sealing ring; 806. Wiring terminal; 9. Terminal cover; 901. PE terminal and low-voltage terminal slot; 902. Cover body; 903. Quick-change terminal limiting hole; 10. Cable sealing pad; 11. Tail cover. DETAILED DESCRIPTION

[0034] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0035] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0036] The present invention is further described in detail below in conjunction with the full text.

[0037] Combined with Figure 1-Figure 8 A DC charging socket with quick-change terminals includes a socket body 2, an end cover 1 on one side of the socket body 2, a terminal pressure cover 9, a cable sealing gasket 10 and a tail cover 11. A DC terminal limiting column is installed in the socket body 2, and a DC terminal protective cover 3 is installed on the DC terminal limiting column. The cable sealing gasket 10 and the tail cover 11 are installed on one side of the terminal pressure cover 9 and inserted into the socket body 2. The terminal pressure cover 9 is fixed to the socket body 2 by a buckle; specifically, the end cover 1 includes a flange, and the DC terminal protective cover 3 is installed above the DC terminal limiting column of the socket body 2; the PE terminal and the low-voltage terminal 4 and the quick-change terminal 8 are installed in the socket body 2 card slot and fixed by the terminal pressure cover 9 and the self-tapping bolt 5; the PCBA assembly 7 is installed at the bottom of the terminal pressure cover 9 and fixed by a buckle; the cable sealing gasket 10 and the tail cover 11 are installed behind the terminal pressure cover 9 and fixed to the socket body 2 by a buckle.

[0038] When the present invention is specifically implemented, Figure 5As shown, the socket body 2 is installed with PE terminals, low-voltage terminals 4 and quick-change terminals 8, and fixed by terminal glands 9 and self-tapping screws 5. The terminal gland 9 includes a gland body 902. The gland body 902 is provided with PE terminal and low-voltage terminal slots 901 for matching the PE terminal and low-voltage terminal 4. The gland body 902 is provided with quick-change terminal limiting holes 903 for matching the quick-change terminal 8. The PE terminal and low-voltage terminal slots 901 fix the positions of the PE terminal and the low-voltage terminal through the limiting slots to prevent the terminals from shaking; and prevent the wiring terminal 806 from rotating; the terminal gland 9 is fixed to the socket body 2 by self-tapping screws 5, and the terminal limiting holes 903, the wiring terminal 806 and the socket body 2 cooperate with each other to limit the axial displacement of the wiring terminal 806.

[0039] When the present invention is specifically implemented, Figure 3 and Figure 4 As shown, the quick-change terminal 8 includes a socket 801, a spring 802 is relatively installed in the socket 801, a terminal 806 is connected to the lower end of the socket 801, and one end of the terminal 806 is inserted into the socket 801, and the terminal 806 and the socket 801 are connected by a bolt 803 and a spring washer 804. A limiting step is provided on the outside of the terminal 806, and the terminal 806 is inserted into the quick-change terminal limiting hole 903 and is limited by the limiting step, and a sealing ring 805 for sealing is installed on the outside of the terminal 806. Specifically, the spring 802 is installed in the internal slot of the socket 801, and contacts the charging gun terminal (not shown in the figure) and the wiring terminal 806 to generate a retaining force, thereby ensuring the effective connection between the socket 801 and the wiring terminal 806, and between the socket 801 and the charging gun terminal; the socket 801 and the wiring terminal 806 are connected by bolts 803 (hexagon socket bolts) and spring washers 804; the sealing ring 805 is installed in the groove of the wiring terminal 806, and cooperates with the socket body 2 to realize the sealing function.

[0040] The terminal gland 9 is provided with a PCBA assembly 7 . Specifically, the PCBA assembly 7 is a circuit board. The temperature sensor 6 is installed in the terminal gland 9 .

[0041] When the present invention is specifically implemented, Figure 7 and Figure 8As shown, two groups of buckle stop posts 201 are installed on the DC terminal limit post, two groups of limit convex ribs 202 are installed on the outside of the DC terminal limit post, and a pressing groove 203 and a clamping groove 204 are provided on the DC terminal limit post. A push switch 301 is installed on the DC terminal protection cover 3, and a buckle 303 that is clamped into the clamping groove 204 is installed on the push switch 301. A convex rib groove 304 used in conjunction with the limit convex rib 202 is installed in the DC terminal protection cover 3, and a schematic mark 302 is provided on the front of the DC terminal protection cover 3. The DC terminal plastic pressure cover 3 is installed on the top of the DC terminal limiting column of the socket body 2 through the buckle 303. The buckle 303 cooperates with the card slot 204 to prevent the DC terminal protection cover from falling off; the schematic mark 302 contains the terminal mark and the open / close lock mark. The DC terminal protection cover 3 rotates counterclockwise to close and clockwise to open; in the open state, the push switch 301 is located at the push slot. By pressing the push switch, the buckle 303 can be disengaged from or enter the card slot 204. At the same time, a limit step is set at the push switch 301 to prevent the buckle from breaking due to excessive pressing; in the closed state, the buckle stop column 201 clamps the push switch 301, the push switch 301 cannot be pressed, and the buckle 303 is stuck with the card slot 204; the limiting rib 202 cooperates with the rib groove 304 to prevent the DC terminal protection cover 3 from rotating in the open / close state, and when the DC terminal protection cover is opened / closed in place, a "click" prompt sound is generated.

[0042] The quick-change terminal socket 801 of the present invention adopts a double-headed female terminal with an embedded double reed design. The socket and the reed are an independent unit, which is convenient for overall replacement, has more stable performance, simple processing technology, small size, and meets the needs of high-current fast charging; the socket and the terminal are connected by bolts, which is convenient for replacement.

[0043] The DC terminal protection cover of the present invention adopts a snap lock device combined with a rotating secondary lock device, which enhances the structural reliability, is convenient for disassembly and assembly, and can be recycled.

[0044] The terminal gland of the present invention is provided with a quick-change terminal limiting hole, and the terminal gland cooperates with the socket body to constrain the position of the quick-change terminal, thereby avoiding the difficulty of plugging and unplugging caused by inaccurate terminal position during use.

[0045] The quick-change terminal of the present invention is provided with a groove, and a sealing ring is installed to cooperate with the socket body to achieve sealing between the quick-change terminal and the inside of the socket, with good sealing effect and low cost.

[0046] The present invention adopts a structure in which the terminal pressure cover cooperates with the socket body to realize the constraint on the terminal displacement, while reducing the overall volume of the socket, which can meet the installation requirements of most vehicles; the quick-change terminal sleeve structure adopts an embedded double spring design, and the sleeve and the spring are an independent unit, which is convenient for overall replacement and has more stable performance; at the same time, the selected spring current carrying capacity can reach 380A, which meets the high current requirements of fast charging; further, the terminal protection cover adopts a snap-on locking device to avoid damage to the structure during disassembly, and at the same time adds a secondary rotating locking device to enhance the structural reliability; the terminal protection cover is located at the top outer circle of the terminal and does not affect the terminal position.

[0047] The present invention and its embodiments are described above, and such description is not restrictive. What is shown in the full text is only one of the embodiments of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A DC charging socket with quick-change terminals, characterized in that: It comprises a socket body (2), an end cover (1) on one side of the socket body (2), a terminal gland (9), a cable sealing gasket (10) and a tail cover (11); A DC terminal limiting column is installed in the socket body (2), and a DC terminal protection cover (3) is installed on the DC terminal limiting column; The cable sealing gasket (10) and the tail cover (11) are installed on one side of the terminal gland (9) and inserted into the socket body (2); the terminal gland (9) is fixed to the socket body (2) by means of a buckle; A PE terminal, a low-voltage terminal (4) and a quick-change terminal (8) are installed in the socket body (2) and are fixed by a terminal gland (9) and a self-tapping bolt (5).

2. A DC charging socket with quick-change terminals according to claim 1, characterized in that: The terminal cover (9) comprises a cover body (902), on which a PE terminal and a low-voltage terminal slot (901) are provided for mounting in cooperation with a PE terminal and a low-voltage terminal (4), and on which a quick-change terminal limiting hole (903) is provided for mounting in cooperation with a quick-change terminal (8).

3. A DC charging socket with quick-change terminals according to claim 2, characterized in that: The quick-change terminal (8) comprises a socket (801), a spring sheet (802) is relatively installed in the socket (801), a wiring terminal (806) is connected to the lower end of the socket (801), and one end of the wiring terminal (806) is inserted into the socket (801), and the wiring terminal (806) and the socket (801) are connected by a bolt (803) and a spring washer (804).

4. A DC charging socket with quick-change terminals according to claim 3, characterized in that: A stepped protrusion is installed on the outer side of the connecting terminal (806), and the connecting terminal (806) is inserted into the quick-change terminal limiting hole (903) and is limited by the stepped protrusion.

5. According to claim 3, a DC charging socket with quick-change terminals is characterized in that: A sealing ring (805) for sealing is installed on the outer side of the connection terminal (806).

6. According to claim 1, a DC charging socket with quick-change terminals is characterized in that: Two groups of buckle stop posts (201) are installed on the DC terminal limit post, two groups of limit convex ribs (202) are installed on the outer side of the DC terminal limit post, and a pressing groove (203) and a locking groove (204) are provided on the DC terminal limit post.

7. A DC charging socket with quick-change terminals according to claim 6, characterized in that: The DC terminal protection cover (3) is provided with a push switch (301), the push switch (301) is provided with a buckle (303) which is inserted into a buckle slot (204), the DC terminal protection cover (3) is provided with a rib groove (304) which cooperates with the limiting rib (202), and a schematic mark (302) is provided on the front of the DC terminal protection cover (3).

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