Novel grounding device

Abstract

The utility model belongs to the technical field of new energy automobile charging equipment, and particularly relates to a novel grounding device which comprises a main body, a plug and three jacks are arranged on the main body, a circuit board is arranged in the main body, a live wire, a zero wire and a ground wire which are communicated with the plug and the three jacks are arranged on the circuit board, a branch line is arranged on the ground wire, and a power-off relay and a resistor are arranged on the branch line. The circuit board is provided with a power-off relay, the power-off relay can control connection of the branch line, the branch line is further provided with a switching relay, the switching relay can be switched to be connected with the zero line or the live line so that the branch line can be communicated with the zero line or the live line, and the circuit board is provided with a ground line detection module which can control whether the power-off relay works or not. The circuit board is provided with a detection chip used for detecting whether current exists on the null line, so that whether a ground wire exists in the household socket or not can be detected, whether the null line and a live line in the household socket are connected reversely or not can be detected, the ground wire in the grounding device is prevented from being connected with the null line all the time, and the situation that a leakage protector trips can be avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to new energy automobile charging equipment technical field, especially a new ground. BACKGROUND

[0002] New energy automobile refers to the unconventional vehicle fuel as power source, the advanced technology of comprehensive vehicle power control and drive, form the advanced technology principle, have new technology, new structure's automobile, although new energy car does not need to fill oil, but needs to give new energy automobile charging periodically, but new energy automobile charging is a problem that user needs to consider, when there is no special charging pile at home, many new energy vehicles will choose more fast portable charging gun, this kind of charging gun needs to be inserted into the socket on one end, and the other end is inserted into the charging port of the vehicle body, in order to charge safely, this kind of charging gun needs to have ground wire when using, when the ground wire detection module on the charging gun detects that the socket is not grounded, the charging gun cannot charge normally, and at present, a ground treasure appears on the market, for example, Chinese patent: CN219018060U, it is mainly used for detecting whether the zero line and the live wire in the socket are reversed, when the zero and live wire of household socket is reversed, at this time, the zero line without electricity will be electrified, the zero line will be electrified after the zero line, which will make the switching relay work, the switching relay can connect the ground wire to the original live wire, at this time, the live wire is not electrified, thereby avoiding the connection of the ground wire and the electrified line, when the zero and live wire of household socket is correct, at this time, the zero line in the socket is connected with the zero line in the ground treasure, the live wire in the socket is connected with the live wire in the ground treasure, and the ground treasure can work normally, but the above ground treasure does not matter whether the socket has ground wire or not, the ground wire in the ground treasure is always connected with the zero line in the ground treasure through the switching relay, so that the switching relay is always in working state, thereby causing the leakage protector to trip easily when the ground treasure is inserted into the socket with ground wire, thereby affecting the normal charging of new energy automobile. SUMMARY

[0003] The utility model aims at providing a kind of simple structure, not only can detect whether there is ground wire in household socket, but also can detect whether the zero line and the live wire in household socket are reversed, to avoid the ground wire in ground treasure is always connected with zero line, more practical, can avoid the tripping of leakage protector.

[0004] The utility model aims at providing a kind of simple structure, not only can detect whether there is ground wire in household socket, but also can detect whether the zero line and the live wire in household socket are reversed, to avoid the ground wire in ground treasure is always connected with zero line, more practical, can avoid the tripping of leakage protector.

[0005] The utility model provides a new type ground, including the main part, be equipped with the plug for connecting domestic socket and be equipped with three jack holes for connecting the plug of charging gun on the main part, be equipped with the circuit board in the main part, be equipped with the fire line, zero line and ground wire of intercommunication plug and three jack holes on the circuit board, be equipped with the branch line of zero line or fire line intercommunication on the ground wire, be equipped with the power-off relay and resistance on the branch line, the power-off relay can control the intercommunication of branch line, and still be equipped with the switching relay on the branch line, the switching relay can switch and connect zero line or fire line to make branch line with zero line or fire line intercommunication, be equipped with the ground wire detection module on the circuit board, the ground wire detection module can be used for detecting whether the ground wire in domestic socket to control whether the power-off relay works, still be equipped with the detection chip for detecting whether the current has in zero line on the circuit board, when the power-off relay stops working, and the detection chip detects that zero line has the current, when the detection chip control switching relay disconnects and connects with fire line and zero line.

[0006] Further, the main body includes a shell and a shell cover, the shell and the shell cover form a receiving cavity therebetween, the circuit board is located in the receiving cavity, a limiting groove is formed in the bottom of the shell cover, and the top end of the circuit board is located in the limiting groove and is clamped with the shell cover.

[0007] Further, the limiting groove is provided with clamping bosses on both sides, and the top end of the circuit board is provided with mounting bosses.

[0008] Further, a display hole is formed in the shell cover, a display screen is further arranged in the receiving cavity, the display screen is connected with the circuit board and located below the display hole, an observation cover is arranged on the shell cover to cover the display hole, and the observation cover is transparent.

[0009] Further, a plurality of buckle grooves are formed in the shell cover, a plurality of buckle members are arranged at the bottom of the observation cover, the buckle members are located in the buckle grooves, the bottom of the buckle member is provided with a buckle block, and the buckle block abuts against the lower surface of the observation cover.

[0010] Further, a guide inclined surface is arranged on the outer side of the buckle block.

[0011] The utility model discloses have the following beneficial effects compared with prior art:

[0012] The utility model belongs to new energy automobile charging equipment technical field, especially point to a kind of novel ground, including main body, and there is plug on main body, and plug is matched with the socket on domestic socket, to make ground can be smoothly inserted into domestic socket and use, three sockets are further equipped on main body, to make the plug on charging gun can be smoothly inserted into ground, there is wiring board in main body, and wiring board is equipped with live wire, zero line and ground wire that communicate plug and three sockets, to when the plug on main body is inserted into the socket of domestic socket, charging gun can be normally charged to new energy automobile after plug on charging gun is inserted into three sockets on main body at this time, and there is a branch line that can be communicated with zero line or live wire on ground wire, and power-off relay and resistance are equipped on branch line, and power-off relay can be used to control the communication of branch line, switching relay is further equipped on branch line, ground wire detection module is equipped on wiring board, and ground wire detection module controls the connection of switching relay and zero line or live wire to read voltage difference value on zero line and live wire, to detect whether there is ground wire in domestic socket to control whether power-off relay works, when switching relay is switched from zero line to live wire, when voltage difference value detected by ground wire detection module reaches 220V, after ground wire detection module identifies that there is ground wire in domestic socket, ground wire detection module will control power-off relay to stop working, so that branch line is in disconnected state, to make the ground wire in ground and the ground wire in domestic socket are connected separately, at this time, whether zero line and live wire in domestic socket are reversed, there is no security risk, and leakage protector will not appear tripping situation, so that new energy automobile can be normally charged, when voltage difference value detected by ground wire detection module is not 220V, after ground wire detection module identifies that there is no ground wire in domestic socket, ground wire detection module will control power-off relay to work normally, to make the branch line on ground wire is in communication state, and detection chip for detecting whether there is current on zero line is equipped on wiring board, when detection chip detects that zero line does not have current, at this time, it proves that although there is no ground wire in domestic socket, zero line and live wire are not reversed, switching relay will not be communicated with live wire, and resistance on branch line can be used to imitate the effect of real grounding, to mislead ground wire detection module on charging gun, so that domestic socket can be normally charged without ground wire, when detection chip detects that zero line has current, it proves that zero line and live wire in domestic socket are reversed, at this time, zero line in ground originally without current will have current, and live wire will not be electrified, and detection chip will control switching relay to be communicated with uncharged live wire, to avoid the situation that ground wire is connected with electrified line, to cause security risk, so that the utility model not only can detect whether there is ground wire in domestic socket, but also can detect whether zero line and live wire in domestic socket are reversed after detecting that there is no ground wire in domestic socket, and it is more practical. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the perspective drawing of the utility model.

[0014] Figure 2 is a sectional view of the utility model.

[0015] Figure 3 is Figure 2 is a local enlarged view of A in the middle.

[0016] Figure 4 is an explosion view of the shell and the shell cover of the utility model.

[0017] Figure 5 is an explosion view of the observation cover and the shell cover of the utility model.

[0018] Figure 6 is a perspective view of the observation cover of the utility model.

[0019] Figure 7 is a schematic diagram of the circuit when the power-off relay stops working.

[0020] Figure 8 is a schematic diagram of the circuit when the power-off relay works.

[0021] Figure 9 is a schematic diagram of the circuit when the power-off relay works.

[0022] Meaning represented by the reference signs in the drawing:

[0023] 1-main body;2-plug;3-three jack;4-circuit board;5-hot line;6-neutral line;7-ground;

[0024] 8-switching relay;9-resistor;11-shell;12-shell cover;13-housing cavity;

[0025] 14-limit slot;15-clamping boss;16-mounting boss;17-display hole;18-display screen;

[0026] 19-observation cover;20-buckling groove;21-buckling piece;22-buckling block;

[0027] 23-guiding slope;24-power-off relay;25-branch line. DETAILED DESCRIPTION

[0028] The utility model will be further described in combination with specific embodiments:

[0029] The utility model belongs to new energy automobile charging equipment technical field, especially a kind of novel ground, including main body 1, there is plug 2 on main body 1, and plug 2 is matched with the socket on domestic socket, so that ground can be inserted into domestic socket and use smoothly, three sockets 3 are further equipped on main body 1, so that the plug 2 on charging gun can be inserted into ground smoothly, there is circuit board 4 in main body 1, and circuit board 4 is equipped with the live wire 5, zero line 6 and ground wire 7 that communicate plug 2 and three sockets 3, so when plug 2 on main body 1 is inserted into the socket of domestic socket, after this, the plug 2 on charging gun is inserted into three sockets 3 on main body 1, charging gun can normally charge new energy automobile, and there is a branch line 25 that can be communicated with zero line 6 or live wire 5 on ground wire 7, branch line 25 is equipped with power-off relay 24 and resistance 9, power-off relay 24 can be used to control the communication of branch line 25, branch line 25 is further equipped with switching relay 8, circuit board 4 is equipped with ground wire detection module, ground wire detection module controls the connection of switching relay 8 and zero line 6 or live wire 5 to read the voltage difference value on zero line 6 and live wire 5, to detect whether there is ground wire in domestic socket to control whether power-off relay 24 works, when switching relay 8 is switched from zero line 6 to live wire 5, when the voltage difference value detected by ground wire detection module reaches 220V, after ground wire detection module identifies that there is ground wire in domestic socket, ground wire detection module will control power-off relay 24 to stop working, so that branch line 25 is in disconnected state, so that ground wire 7 in ground and ground wire in domestic socket are connected separately, at this time, whether the zero line and live wire in domestic socket are reversed or not, there is no security risk, and leakage protector will not trip, so that new energy automobile can be charged normally, when the voltage difference value detected by ground wire detection module is not 220V, after ground wire detection module identifies that there is no ground wire in domestic socket, ground wire detection module will control power-off relay 24 to work normally, so that branch line 25 on ground wire 7 is in communication state, and circuit board 4 is equipped with detection chip for detecting whether there is current on zero line 6, when detection chip detects that zero line 6 does not have current, at this time, it proves that although there is no ground wire in domestic socket, zero line and live wire are not reversed, switching relay 8 will not be communicated with live wire 5, and resistance 9 on branch line 25 can be used to simulate the effect of real grounding, to mislead the ground wire detection module on charging gun, so that domestic socket without ground wire can also be charged normally, after detection chip detects that zero line 6 has current, it proves that zero line and live wire in domestic socket are reversed, at this time, zero line 6 in ground originally without current will have current, and live wire 5 will not be electrified, detection chip will control switching relay 8 to be communicated with live wire 5 without electrification, so that the situation that ground wire 7 is connected with electrified line occurs, to make the utility model not only can detect whether there is ground wire in domestic socket, but also can detect whether zero line and live wire in domestic socket are reversed after detecting that there is no ground wire in domestic socket, and the practicability is stronger.

[0030] Preferably, the main body 1 comprises a shell 11 and a shell cover 12, a receiving cavity 13 is formed between the shell 11 and the shell cover 12, the circuit board 4 is located in the receiving cavity 13, a limiting groove 14 is formed in the bottom of the shell cover 12, and the top end of the circuit board 4 is located in the limiting groove 14 and is clamped with the shell cover 12; the receiving cavity 13 formed between the shell 11 and the shell cover 12 enables the circuit board 4 to be smoothly installed into the main body 1, and the top end of the circuit board 4 is located in the limiting groove 14 in the bottom of the shell cover 12 and is clamped with the shell cover 12, thereby limiting the circuit board 4 from moving randomly in the receiving cavity 13, and enabling the grounding treasure to be normally used.

[0031] Preferably, clamping bosses 15 are arranged on both sides of the limiting groove 14, the top end of the circuit board 4 is provided with a mounting boss 16, and the mounting boss 16 abuts against the clamping bosses 15; the mounting boss 16 at the top end of the circuit board 4 is located in the limiting groove 14 and is clamped with the clamping bosses 15 on both sides of the limiting groove 14, thereby enabling the mounting boss 16 to be unable to be separated from the limiting groove 14, and enabling the circuit board 4 to be more stably installed in the receiving cavity 13.

[0032] Preferably, a display hole 17 is formed in the shell cover 12, a display screen 18 is further arranged in the receiving cavity 13, the display screen 18 is connected with the circuit board 4 and is located below the display hole 17, an observation cover 19 is arranged on the shell cover 12 and covers the display hole 17, and the observation cover 19 is transparent; the observation cover 19 is a common transparent cover on the market, the user can observe the information on the display screen 18 in the receiving cavity 13 through the display hole 17 in the shell cover 12, and the display screen 18 displays the information whether there is a ground wire in the household socket and whether the zero line and the live wire in the household socket are reversed, thereby enabling the user to observe intuitively.

[0033] Preferably, a plurality of buckle grooves 20 are formed in the shell cover 12, a plurality of buckle members 21 are arranged at the bottom of the observation cover 19, the buckle members 21 are located in the buckle grooves 20, a buckle block 22 is arranged at the bottom of the buckle member 21, and the buckle block 22 abuts against the lower surface of the observation cover 19; the buckle members 21 at the bottom of the observation cover 19 are located in the buckle grooves 20 of the shell cover 12, and the buckle block 22 at the bottom of the buckle member 21 abuts against the lower surface of the observation cover 19, thereby limiting the observation cover 19 from being separated from the shell cover 12, and enabling the observation cover 19 to be stably installed on the shell cover 12.

[0034] Preferably, the outer side of the buckle block 22 is provided with a guide slope 23; when the user installs the observation cover 19, the user only needs to align the buckle piece 21 with the buckle groove 20 on the shell cover 12, and then, because the outer side of the buckle block 22 has the guide slope 23, the user only needs to apply pressure to the observation cover 19, so that the buckle block 22 can smoothly enter the buckle groove 20 and abut against the lower surface of the observation cover 19, thereby enabling the user to quickly install the observation cover 19 on the shell cover 12.

[0035] The above embodiments are only preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A novel grounding transformer, comprising a main body (1), characterized in that... The main body (1) is provided with a plug (2) for connecting to a household socket and a three-prong socket (3) for connecting a charging gun plug (2). A circuit board (4) is provided inside the main body (1). The circuit board (4) is provided with a live wire (5), a neutral wire (6), and a ground wire (7) connecting the plug (2) and the three-prong socket (3). A branch line (25) is provided on the ground wire (7) that can be connected to either the neutral wire (6) or the live wire (5). A power-off relay (24) and a resistor (9) are provided on the branch line (25). The power-off relay (24) can control the connection of the branch line (25), and a switching relay (8) is also provided on the branch line (25). The switching relay (8) can switch to connect with the neutral wire (6) or the live wire (5) so that the branch line (25) is connected to the neutral wire (6) or the live wire (5). The circuit board (4) is provided with a ground wire detection module. The ground wire detection module can be used to detect whether there is a ground wire in the household socket so as to control whether the power-off relay (24) works. The circuit board (4) is also provided with a detection chip for detecting whether there is current on the neutral wire (6). When the power-off relay (24) stops working and the detection chip detects that there is current in the neutral wire (6), the detection chip controls the switching relay (8) to disconnect from the neutral wire (6) and connect to the live wire (5).

2. The novel grounding transformer according to claim 1, characterized in that: The main body (1) includes a shell (11) and a cover (12), and a receiving cavity (13) is formed between the shell (11) and the cover (12). The circuit board (4) is located in the receiving cavity (13). A limiting groove (14) is opened at the bottom of the cover (12), and the top of the circuit board (4) is located in the limiting groove (14) and is engaged with the cover (12).

3. The novel grounding transformer according to claim 2, characterized in that: Both sides of the limiting channel (14) are provided with snap-fit ​​bosses (15), and the top of the circuit board (4) is provided with an mounting boss (16), which abuts against the snap-fit ​​bosses (15).

4. A novel grounding transformer according to any one of claims 2-3, characterized in that: The cover (12) has a display hole (17), and the cavity (13) is also provided with a display screen (18). The display screen (18) is connected to the circuit board (4) and located below the display hole (17). The cover (12) has an observation cover (19) that covers the display hole (17). The observation cover (19) is transparent.

5. A novel grounding transformer according to claim 4, characterized in that: The cover (12) has several snap-fit ​​grooves (20), and the bottom of the observation cover (19) has several snap-fit ​​parts (21). The snap-fit ​​parts (21) are located in the snap-fit ​​grooves (20), and the bottom of the snap-fit ​​parts (21) has a snap-fit ​​block (22). The snap-fit ​​block (22) abuts against the lower surface of the observation cover (19).

6. A novel grounding transformer according to claim 5, characterized in that: The outer side of the latching block (22) is provided with a guide slope (23).

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