Gaugeable and separable alternating current charging gun

Abstract

The invention provides a measurable and separable alternating current charging gun, and belongs to the technical field of charging guns, the measurable and separable alternating current charging gun comprises a charging gun body, a built-in mounting cavity, a plunger head and a connecting cavity, and the plunger head is provided with a first wiring terminal; the metering module is positioned in the mounting cavity; one end of the connector is connected with a cable, the other end of the connector is provided with a second wiring terminal, and when the connector is inserted into the connecting cavity, the second wiring terminal and the first wiring terminal form male and female insertion fit; the rotary cover is provided with a first through groove, the rotary cover is detachably connected to the connecting cavity, and the structure, inserted into the connecting cavity, on the connector is locked in the connecting cavity or unlocked through rotation of the rotary cover. The charging gun body and the connector provided with the cable are of a separable structure, so that the charging gun body with the metering module is convenient to disassemble, calibrate and maintain, and accurate metering of the metering module is guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of charging guns, and relates to an alternating current charging gun, in particular to an alternating current charging gun that can be metered and separated. Background Art

[0002] Electric vehicle charging piles are the most basic power facilities for electric vehicle charging. The current metering device is installed inside the electric vehicle charging pile, resulting in a relatively long cable between the metering device and the charging gun. Due to cable losses, the metered power consumption is large, affecting the final metering result.

[0003] Patent application CN202010167614.4 discloses a charging gun with charging control and metering functions, in which the metering module is installed on the charging gun, so that the power consumed by the cable is not included in the metering module, improving the metering accuracy.

[0004] In actual use, when the charging gun has been used for a period of time, the metering module needs to be calibrated and the charging gun needs to be maintained. According to the charging gun disclosed in the comparative document, since one end of the cable is connected to the charging pile and the other end is integrally arranged with the charging gun body, when calibrating the metering module and maintaining the charging gun, the entire charging gun needs to be removed from the charging pile. At this time, the charging pile needs to be opened and a series of operations are required to complete the disassembly of the charging gun, which is rather troublesome and has low work efficiency. Summary of the Invention

[0005] The object of the present invention is to address the above problems existing in the prior art and propose an alternating current charging gun that is convenient for calibrating the metering module, maintaining, and has high-precision metering.

[0006] The object of the present invention can be achieved by the following technical solutions: An alternating current charging gun that can be metered and separated, comprising:

[0007] A charging gun body provided with a hollow interior, and the internal space of the charging gun body is divided into an installation cavity and a connection cavity along its axial direction by a plunger head. A first wiring terminal is provided on the plunger head, and the first end of the first wiring terminal is located in the installation cavity and extends out of the installation cavity along the length direction of the installation cavity, and the second end of the first wiring terminal is located in the connection cavity;

[0008] A metering module, located in the installation cavity, and the power data measured by the metering module is displayed on the charging gun body or on the charging pile;

[0009] The connector has a cable electrically connected to a charging pile at one end and a second terminal at the other end. The end face where the second terminal is located is flat. When the connector is inserted into the connection cavity, the second terminal forms a male-female plug-in fit with the first terminal to complete the electrical connection between the connector and the charging gun body.

[0010] The rotary cover is provided with a first through groove for the cable to pass through, and the rotary cover is detachably connected to the connection cavity. By rotating the rotary cover, the structure of the connector inserted into the connection cavity is locked in the connection cavity or unlocked.

[0011] In the above-mentioned metering and separable AC charging gun, the connection cavity includes a connection cavity opening, a connection cavity wall, and a connection cavity bottom. Among them, the first end of the first terminal penetrates the connection cavity bottom and extends into the installation cavity, and extends along the length direction of the installation cavity. The second end of the first terminal is located in the connection cavity and extends towards the connection cavity opening, and a first locking portion is provided on the connection cavity wall; the two ends along the axis direction of the rotary cover are respectively a second locking portion and a trigger portion. When the second locking portion is inserted at the connection cavity opening, the trigger portion is located outside the connection cavity. By rotating the trigger portion, the locking or unlocking between the second locking portion and the first locking portion is completed.

[0012] In the above-mentioned metering and separable AC charging gun, the second locking portion is provided with a concave cavity, and the axis of the concave cavity is coaxially arranged with the axis of the first through groove. Among them, the concave cavity includes a concave cavity bottom and a concave cavity opening, and the first through groove penetrates the concave cavity bottom and extends towards the concave cavity opening. The diameter of the first through groove is smaller than the circumferential diameter of the concave cavity. When the second locking portion is inserted at the connection cavity opening, the end of the connector provided with the cable abuts against the concave cavity bottom.

[0013] In the above-mentioned metering and separable AC charging gun, the first locking portion includes a guiding groove and a locking groove located on the connection cavity wall and communicating with each other. The extending direction of the guiding groove is consistent with the insertion direction of the rotary cover, and the extending direction of the locking groove is consistent with the rotation direction of the rotary cover. Among them, the second locking portion is in sliding fit with the guiding groove, and the second locking portion is in rotational fit with the locking groove.

[0014] In the above-mentioned metering and separable AC charging gun, the charging gun body includes an adapter, and the adapter is connected to the connection cavity opening through a fastener. Among them, the adapter is provided with a second through groove along the axis direction, and the second locking portion is arranged on the groove wall of the second through groove.

[0015] In the above-mentioned metering and separable AC charging gun, the adapter includes a first convex ring and a first convex platform connected to each other, and the diameter of the first convex ring is greater than that of the first convex platform. Among them, the second through groove penetrates through the first convex ring and the first convex platform, and the first locking portion is arranged on the first convex platform. Among them, the groove depth of the guiding groove is less than the wall thickness of the first convex platform, and the locking groove penetrates through the wall thickness of the first convex platform.

[0016] In the above-mentioned metering and separable AC charging gun, the rotary cover includes a second convex ring, and a second convex platform and a third convex platform are respectively arranged at both ends along the axis direction of the second convex ring. The second locking portion and the concave cavity are arranged on the second convex platform, and the third convex platform serves as a trigger portion. Among them, the first through groove sequentially penetrates through the third convex platform, the second convex ring and the second convex platform along the axis direction. When the second convex platform is inserted and matched with the second through groove, the second convex ring abuts against the first convex ring.

[0017] In the above-mentioned metering and separable AC charging gun, a first step is arranged at the orifice of the connection cavity, and the first step forms an abutment with the first convex ring. Among them, the sum of the thicknesses of the first convex ring and the second convex ring is not greater than the distance between the side of the first step in contact with the first convex ring and the plane where the orifice of the connection cavity is located.

[0018] In the above-mentioned metering and separable AC charging gun, a second step is arranged on the wall of the connection cavity, and a first sealing member is arranged between the first convex platform and the second step. When the connector is inserted into the connection cavity, it is nested and connected with the first sealing member. Among them, a plurality of first flanges are arranged on the outer peripheral surface of the first sealing member, and the plurality of first flanges are distributed along the axis direction of the first sealing member.

[0019] In the above-mentioned metering and separable AC charging gun, a positioning structure is arranged between one end of the connector provided with the second wiring terminal and the bottom of the connection cavity. The positioning structure includes a positioning concave portion or a positioning convex portion arranged on the connector, and a positioning convex portion or a positioning concave portion correspondingly arranged on the bottom of the connection cavity.

[0020] In the above-mentioned metering and separable AC charging gun, the connector includes:

[0021] A housing, on which a first end face, a second end face and a third through groove for the cable to run along the axis direction of the housing are arranged. Among them, the third through groove penetrates through the first end face, the second wiring terminal penetrates through the second end face, and the cable is connected to the second wiring terminal;

[0022] An anti-disconnection module, which is located inside the housing, and the anti-disconnection module includes:

[0023] A snap ring is clamped on the cable and is close to one end connected to the second terminal. At least three contact areas are formed between the inner side wall of the snap ring and the outer side wall of the cable through the deformation of the snap ring. The mutual sliding between the snap ring and the cable along the axial direction is defined by the contact areas.

[0024] A limiting member is nested on the cable and is located between the snap ring and the first end face. The two sides along the axial direction of the limiting member are respectively a first limiting portion and a second limiting portion. Among them, the first limiting portion is in abutting cooperation with the snap ring, the second limiting portion is in abutting cooperation with the first end face, and the maximum edge diameter of the limiting member is greater than the diameter of the third through groove and less than the maximum diameter of the first end face.

[0025] In the above-mentioned metering and separable AC charging gun, the contact area between the inner side wall of the deformed snap ring and the outer side wall of the cable is line-surface contact or surface-surface contact.

[0026] In the above-mentioned metering and separable AC charging gun, an anti-twist portion is further provided on the first limiting portion of the limiting member, and the anti-twist portion is nested and matched with the snap ring. Among them, at least one limiting plane on the inner circumferential surface of the anti-twist portion is in surface-surface contact with the outer circumferential surface of the snap ring.

[0027] In the above-mentioned metering and separable AC charging gun, a second sealing member is provided between the limiting member and the first end face, and the second sealing member is nested and matched with the cable. Among them, the two sides along the axial direction of the second sealing member are respectively abutted against the limiting member and the first end face, and multiple second flanges are provided on the outer circumferential surface of the second sealing member, and the multiple second flanges are distributed along the axial direction of the second sealing member.

[0028] In the above-mentioned metering and separable AC charging gun, at least two positioning plates are further provided in the connector. Multiple positioning holes along the axial direction are formed between the two positioning plates and between the positioning plates and the housing. Among them, the second terminal includes multiple wiring ends, the multiple wiring ends are connected to the cable, and the multiple wiring ends are correspondingly inserted into the multiple positioning holes.

[0029] In the above-mentioned metering and separable AC charging gun, the housing includes a separable outer shell and an end cover. The outer shell is hollow, and a third through groove for the cable to pass through is provided on the end cover. Among them, the first end face is provided on the end cover, the second end face is provided on the outer shell, and a detachable structure is provided between the outer shell and the end cover. A part of the detachable structure is provided on the side wall of the outer shell, and another part of the detachable structure is provided on the side wall of the end cover.

[0030] In the above-mentioned metering and separable AC charging gun, the charging gun body includes a gun body, and the gun body is arranged in a spliced manner or integrally. Among them, when the gun body is arranged in a spliced manner, the gun body includes an upper cover and a lower cover that can be spliced up and down.

[0031] In the above-mentioned metering and separable AC charging gun, the metering module is used to calculate the bidirectional flowing electricity between the charging pile and the electric vehicle load; the metering module at least includes:

[0032] A collection circuit, which is configured to obtain the electrical parameter signals flowing through the cable;

[0033] A calculation circuit, which is configured to calculate the corresponding electrical parameter values according to the obtained electrical parameter signals;

[0034] A control circuit, which is configured to output corresponding control signals according to the instruction signals of the terminal or the electrical parameter values calculated by the calculation circuit to send the electrical parameter values and the position information of the charging gun body to the terminal at regular intervals;

[0035] A communication circuit, which is configured to wirelessly send the electrical parameter values and the position data of the charging gun body to the terminal that has established a data connection with the charging gun body, and enable the terminal to determine the positioning information of the charging and discharging gun head device.

[0036] Compared with the prior art, the beneficial effects of the present invention are:

[0037] (1) For the metering and separable AC charging gun provided by the present invention, since the charging gun body and the connector provided with the cable are of a separable structure, it is convenient to disassemble, calibrate and maintain the charging gun body with the metering module, thereby ensuring the accurate metering of the metering module;

[0038] (2) Since the trigger part is located outside the connection cavity, it is convenient for the staff to rotate the rotary cover without tools, thereby restricting the movement of the connector in the axial direction after the connector and the charging gun body are electrically connected, and releasing the limit of the connector in the axial direction, realizing the detachable separation of the connector and the charging gun body;

[0039] (3) A concave cavity is provided on the second locking portion. On the one hand, when the connector is electrically connected to the charging gun body, the connector can be clamped between the bottom of the connection cavity and the bottom of the concave cavity, which not only realizes the axial limit of the connector in the connection cavity, but also improves the reliability of the electrical connection between the connector and the charging gun body, preventing loosening between the two. On the other hand, since one end of the cable is inserted into the concave cavity on the connector, the radial degree of freedom of the connector is limited, avoiding the shaking of the connector in the connection cavity during the movement of the charging gun. In addition, when the charging gun body needs to be separated from the connector, since the diameter of the first through groove is smaller than the circumferential diameter of the concave cavity, the rotary cover unscrewed from the mouth of the connection cavity can always be sleeved on the cable until the connector is plugged into the corresponding charging gun body again, and then it can be locked by the rotary cover, avoiding the loss of the rotary cover;

[0040] (4) By providing a guiding groove, when the rotary cover is inserted from the mouth of the connection cavity, it can move along a preset trajectory, ensuring that the second locking portion can be reliably inserted into the locking groove during the subsequent rotation process, improving the disassembly and assembly efficiency, and also avoiding damage to the second locking portion;

[0041] (5) By providing an adapter, the guiding groove and the locking groove originally required to be opened on the wall of the connection cavity are transferred to the wall of the second through groove of the adapter. The adapter is an independent structure, which is convenient for opening the guiding groove and the locking groove on the wall of the second through groove of the adapter, reducing the grooving process;

[0042] (6) By providing a first step, it can not only serve as a positioning structure when the adapter is connected to the connection cavity, but also make the diameter of the wall of the connection cavity smaller than the diameter of the mouth of the connection cavity, thereby further blocking water vapor or dust from entering the connection cavity;

[0043] (7) Since the sum of the thicknesses of the first convex ring and the second convex ring is not greater than the distance between the side of the first step in contact with the first convex ring and the plane of the mouth of the connection cavity, the side of the second convex ring connected to the third boss is indented into the mouth of the connection cavity, further limiting the shaking of the rotary cover during rotation and the shaking of the charging gun during movement, improving the connection reliability between the first locking portion and the second locking portion;

[0044] (8) By providing multiple first flanges on the outer peripheral surface of the first seal, and the first seal is generally made of a flexible material. When the first seal is embedded in the connection cavity, the first flanges on the first seal will be squeezed and deformed, thereby increasing the friction between the first seal and the wall of the connection cavity, and further improving the waterproof and dustproof effect;

[0045] (9) By setting the positioning recess and the positioning protrusion, accurate connection between the first terminal and the second terminal can be achieved. Additionally, by setting the positioning recess and the positioning protrusion, circumferential rotation of the connector can be avoided when the first terminal and the second terminal are inserted into each other, improving the quick connection between the first terminal and the second terminal;

[0046] (10) Through the cooperation between the retaining ring and the cable, an integral structure is formed between the retaining ring and the cable, and no relative slippage occurs between them. By the abutment of the limiting member against the retaining ring and the first end face, the freedom degree of the retaining ring in the axial direction is limited, and further the freedom degree of the cable in the axial direction is limited, realizing the anti-disengagement function of the cable;

[0047] (11) By setting the second seal, the relative distance between the retaining ring and the first end face is increased, and the second seal has a certain strength, which can further realize the anti-disengagement function of the cable. By arranging multiple second flanges on the outer peripheral surface of the second seal, and the second seal is generally made of a flexible material, when the second seal is embedded in the shell, the second flanges on the second seal will be squeezed and deformed, thereby increasing the friction force between the second seal and the inner wall of the shell. On the one hand, the waterproof and dustproof effect can be further improved, and on the other hand, the anti-disengagement ability of the second seal can be improved, thereby further indirectly improving the anti-disengagement ability of the cable;

[0048] (12) By setting the positioning plate, on the one hand, it is convenient for the quick assembly of the second terminal and ensures that the angle and clearance between any two adjacent terminals are constant. On the other hand, during the plugging and unplugging process of the connector, the second terminal will not shake inside the connector, improving the plugging and electrical connection effects. Thirdly, since the material of the positioning plate is an insulating material, it can achieve a good insulating effect;

[0049] (13) The gun body is spliced up and down, which is convenient for the assembly of the internal structure of the charging gun body. Additionally, the gun body is composed of an upper cover and a lower cover spliced up and down. Therefore, the force direction is the radial direction, while the plugging and unplugging direction between the charging gun body and the connector is the axial direction. So the plugging and unplugging force generated by the two will not affect the splicing between the upper cover and the lower cover, thus ensuring the strength and reliability of the charging gun body. Description of the Drawings

[0050] Figure 1 is a schematic structural diagram of an AC charging gun with metering and separable functions according to the present invention.

[0051] Figure 2 is Figure 1 a schematic structural diagram of the AC charging gun shown from another perspective.

[0052] Figure 3 isFigure 2 Cross-sectional view of the cutting plane line A-A

[0053] Figure 4 is Figure 1 Partial structural schematic diagram of the AC charging gun shown

[0054] Figure 5 is Figure 4 Another perspective of the partial structural schematic diagram of the AC charging gun shown

[0055] Figure 6 is Figure 5 Cross-sectional view of the cutting plane line B-B shown in

[0056] Figure 7 is Figure 1 Structural schematic diagram of the connector in

[0057] Figure 8 is Figure 7 Structural schematic diagram of another perspective of the connector shown

[0058] Figure 9 is Figure 8 Cross-sectional view of the cutting plane line C-C shown in

[0059] Figure 10 is Figure 7 Partial structural schematic of the connector shown Figure 1 .

[0060] Figure 11 is Figure 7 Partial structural schematic of the connector shown Figure 2 .

[0061] Figure 12 is Figure 11 Partial structural schematic diagram of another perspective of the connector shown

[0062] Figure 13 is Figure 1 Structural schematic diagram of the rotary cover in

[0063] Figure 14 is Figure 13 Structural schematic diagram of another perspective of the rotary cover shown

[0064] Figure 15 is Figure 14 Cross-sectional view of the cutting plane line D-D in

[0065] Figure 16 is Figure 1 Structural schematic diagram of the connector in

[0066] Figure 17 Functional block diagram of the metering module

[0067] In the figure,

[0068] 100, charging gun body; 110, plunger head; 120, installation cavity; 130, connection cavity; 131, connection cavity opening; 132, connection cavity wall; 133, connection cavity bottom; 134, first step; 135, second connection hole; 136, second step; 137, positioning convex part; 140, first terminal; 150, adapter; 151, guide groove; 152, locking groove; 153, second through groove; 154, first convex ring; 155, first boss; 156, first connection hole; 160, first seal; 161, first flange; 170, gun body; 171, upper cover; 172, lower cover;

[0069] 200, metering module;

[0070] 300, connector; 310, cable; 320, second terminal; 330, positioning recess; 340, housing; 341, first end face; 342, second end face; 343, third through groove; 344, outer shell; 3441, clamping block; 345, end cover; 3451, card slot; 350, anti - detachment module; 351, snap ring; 3511, contact area; 352, limiting part; 3521, first limiting part; 3522, second limiting part; 3523, anti - torsion part; 353, second seal; 3531, second flange; 360, positioning plate; 361, positioning hole;

[0071] 400, screw cap; 410, first through groove; 420, concave cavity; 421, concave cavity bottom; 422, concave cavity opening; 430, second convex ring; 440, second boss; 450, third boss; 460, locking block. Detailed implementation manners

[0072] The following are specific embodiments of the present invention and in combination with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

[0073] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If this specific posture changes, then the directional indications will also change accordingly.

[0074] As Figures 1 to 17 shown, an AC charging gun provided by the present invention, which is measurable and separable, includes:

[0075] The charging gun body 100 is provided with a hollow structure, and the internal space of the charging gun body 100 is divided into an installation cavity 120 and a connection cavity 130 along the axial direction thereof by a plunger head 110. A first wiring terminal 140 is provided on the plunger head 110. The first end of the first wiring terminal 140 is located in the installation cavity 120 and extends out of the installation cavity 120 along the length direction of the installation cavity 120. The second end of the first wiring terminal 140 is located in the connection cavity 130;

[0076] The metering module 200 is located in the installation cavity 120. The power consumption data measured by the metering module 200 is displayed on the charging gun body 100 or on the charging pile;

[0077] One end of the connector 300 is connected with a cable 310 electrically connected to the charging pile, and the other end is provided with a second wiring terminal 320. The end face where the second wiring terminal 320 is located is arranged as a plane. When the connector 300 is inserted into the connection cavity 130, the second wiring terminal 320 and the first wiring terminal 140 form a male-female plug-in fit to complete the electrical connection between the connector 300 and the charging gun body 100;

[0078] The rotary cover 400 is provided with a first through groove 410 for the cable 310 to pass through, and the rotary cover 400 is detachably connected to the connection cavity 130. By rotating the rotary cover 400, the structure of the connector 300 inserted into the connection cavity 130 is locked in the connection cavity 130 or unlocked.

[0079] It is worth mentioning that by rotating the rotary cover 400, the structure of the connector 300 inserted into the connection cavity 130 is locked in the connection cavity 130. At this time, when the charging gun is inserted and electrically connected to the charging port of the electric vehicle, the electric vehicle can be charged, and the charging power can be reflected on the charging gun in real time or on the charging pile; when it is necessary to calibrate the metering module 200 in the charging gun or perform maintenance on the charging gun, reverse the rotary cover 400 and remove the rotary cover 400 from the connection cavity 130. At this time, the connector 300 can be pulled out of the connection cavity 130 to realize the separation between the charging gun body 100 and the connector 300, so as to facilitate the staff to directly carry the charging gun body 100 to the calibration location or the maintenance location for calibration or maintenance, and the operation is convenient and reliable.

[0080] An AC charging gun provided by the present invention is metering and separable. Since the charging gun body 100 and the connector 300 provided with the cable 310 are of a separable structure, it is convenient to disassemble, calibrate and maintain the charging gun body 100 with the metering module 200, thereby ensuring the accurate metering of the metering module 200.

[0081] It is worth mentioning that for the charging gun disclosed in the similar background art, since the charging gun and the cable 310 are of an integrated structure, although the metering module 200 is arranged in the charging gun to improve the metering accuracy, when the metering module 200 in the charging gun needs to be calibrated and the charging gun needs to be maintained, generally two methods are adopted. One is to disassemble the charging gun together with the cable 310 from the charging pile and then go to the calibration location or the maintenance location for calibration and maintenance. However, the disassembly and assembly are not convenient. The other is to directly take the charging gun, the cable 310 and the charging pile to the calibration location or the maintenance location for calibration and maintenance. However, the charging pile is relatively large in volume, heavy and inconvenient to carry.

[0082] Therefore, whether method one or method two is adopted, it is not convenient for the calibration of the metering module 200 and the maintenance of the charging gun. Therefore, it is possible that the calibration of the metering module 200 and the maintenance of the charging gun are not carried out for a long time, or the number of calibrations of the metering module 200 and the number of maintenance of the charging gun are reduced. This may lead to, on the one hand, the reduction of the metering accuracy of the metering module 200 due to the lack of calibration for a long time, which is not beneficial to consumers, and on the other hand, the reduction of the service life of the charging gun due to the lack of maintenance for a long time. Therefore, the charging gun of the present invention can avoid the slackness of reducing the number of calibrations of the metering module 200 and the number of maintenance of the charging gun, ensure the reliability and accuracy of the metering module 200 during metering detection, and extend the service life of the charging gun.

[0083] Further preferably, the connection cavity 130 includes a connection cavity opening 131, a connection cavity wall 132 and a connection cavity bottom 133. Among them, the first end of the first wiring terminal 140 penetrates through the connection cavity bottom 133 and extends into the installation cavity 120 and extends along the length direction of the installation cavity 120. The second end of the first wiring terminal 140 is located in the connection cavity 130 and extends towards the connection cavity opening 131, and a first locking portion is arranged on the connection cavity wall 132; the two ends along the axis direction of the rotary cover 400 are respectively a second locking portion and a trigger portion. When the second locking portion is inserted at the connection cavity opening 131, the trigger portion is located outside the connection cavity 130, and the locking or unlocking between the second locking portion and the first locking portion is completed by rotating the trigger portion.

[0084] It is worth mentioning that when the rotary cap 400 is rotated, the connection between the first locking portion and the second locking portion is locked, and the structure of the connector 300 inserted into the connection cavity 130 is limited within the connection cavity 130, preventing the first wiring terminal 140 and the second wiring terminal 320 from being disengaged due to the movement of the connector 300 along the axis of the connection cavity 130. In addition, the connection cavity 130 is sealed by the rotary cap 400 to prevent external moisture or dust from entering the connection cavity 130 and affecting the electrical connection effect between the connector 300 and the charging gun body 100. When the trigger portion is rotated in the reverse direction, the connection between the first locking portion and the second locking portion is released. At this time, the rotary cap 400 can be detached from the connection cavity opening 131, and the limit on the connector 300 in the axial direction is released. At this time, the connector 300 can be directly pulled out from the charging gun body 100 to complete the separation between the two.

[0085] In this embodiment, since the trigger portion is located outside the connection cavity 130, it is convenient for the staff to rotate the rotary cap 400 without tools, thereby limiting the movement of the connector 300 along the axial direction after the electrical connection between the connector 300 and the charging gun body 100, and releasing the limit on the connector 300 in the axial direction, realizing the detachable separation between the connector 300 and the charging gun body 100.

[0086] Further preferably, a concave cavity 420 is provided on the second locking portion, and the axis of the concave cavity 420 is coaxially arranged with the axis of the first through groove 410. Among them, the concave cavity 420 includes a concave cavity bottom 421 and a concave cavity opening 422, and the first through groove 410 penetrates the concave cavity bottom 421 and extends towards the concave cavity opening 422. The diameter of the first through groove 410 is smaller than the circumferential diameter of the concave cavity 420. When the second locking portion is inserted into the connection cavity opening 131, one end of the cable 310 provided on the connector 300 abuts against the concave cavity bottom 421.

[0087] In this embodiment, a concave cavity 420 is provided on the second locking portion. On the one hand, when the connector 300 is electrically connected to the charging gun body 100, the connector 300 can be clamped between the bottom 133 of the connection cavity and the bottom 421 of the concave cavity, which not only realizes the axial limit of the connector 300 in the connection cavity 130, but also improves the reliability of the electrical connection between the connector 300 and the charging gun body 100, preventing loosening between the two. On the other hand, since one end of the cable 310 is inserted into the concave cavity 420 on the connector 300, the radial degree of freedom of the connector 300 is limited, avoiding the shaking of the connector 300 in the connection cavity 130 during the movement of the charging gun. In addition, when it is necessary to separate the charging gun body 100 from the connector 300, since the diameter of the first through groove 410 is smaller than the circumferential diameter of the concave cavity 420, the rotary cover 400 unscrewed from the opening 131 of the connection cavity can always be sleeved on the cable 310 until the connector 300 is plugged into the corresponding charging gun body 100 again, and then it can be locked by the rotary cover 400, avoiding the loss of the rotary cover 400.

[0088] Preferably, the first locking portion includes a guiding groove 151 and a locking groove 152 which are located on the wall 132 of the connection cavity and communicate with each other. The extending direction of the guiding groove 151 is the same as the inserting direction of the rotary cover 400, and the extending direction of the locking groove 152 is the same as the rotating direction of the rotary cover 400. When the second locking portion is inserted into the opening 131 of the connection cavity, the second locking portion first forms a plug-in fit with the guiding groove 151 and moves along the guiding groove 151. When the second locking portion reaches the intersection position of the guiding groove 151 and the locking groove 152, the rotating trigger portion is rotated to make the second locking portion move along the locking groove 152 until the second locking portion abuts against the end of the locking groove 152.

[0089] In this embodiment, by providing the guiding groove 151, when the rotary cover 400 is inserted from the opening 131 of the connection cavity, it can move along a preset track, ensuring that the second locking portion can be reliably inserted into the locking groove 152 during the subsequent rotation of the rotary cover 400, improving the disassembly and assembly efficiency, and avoiding damage to the second locking portion.

[0090] Furthermore, the number of the guiding grooves 151 and the locking grooves 152 is multiple, and the multiple guiding grooves 151 and the multiple locking grooves 152 are respectively annularly distributed along the axis direction of the connection cavity 130. Each guiding groove 151 and the locking groove 152 at the corresponding position are spliced to form the corresponding second locking portion, and the second locking portion is arranged in an L shape.

[0091] In this embodiment, by providing multiple guiding grooves 151 and multiple locking grooves 152, the reliability of the locking between the first locking portion and the second locking portion is improved. Even if one group of the guiding grooves 151 and the locking grooves 152 is damaged, the locking effect can still be achieved.

[0092] It is worth mentioning that, due to the relatively high process difficulty of directly forming the guiding groove 151 and the locking groove 152 on the wall 132 of the connection cavity, and it will also affect the strength and appearance of the entire charging gun body 100. Therefore, the charging gun body 100 includes an adapter 150, and the adapter 150 is connected to the opening 131 of the connection cavity through a fastener. Among them, the adapter 150 is provided with a second through groove 153 along the axial direction, and the second locking portion is arranged on the wall of the second through groove 153.

[0093] In this embodiment, by providing the adapter 150, the guiding groove 151 and the locking groove 152 that originally needed to be formed on the wall 132 of the connection cavity are transferred to the wall of the second through groove 153 of the adapter. And the adapter 150 is an independent structure, thus facilitating the formation of the guiding groove 151 and the locking groove 152 on the wall of the second through groove 153 of the adapter 150, reducing the grooving process.

[0094] Furthermore, the adapter 150 includes a first convex ring 154 and a first convex platform 155 that are connected to each other, and the diameter of the first convex ring 154 is larger than the diameter of the first convex platform 155. Among them, the second through groove 153 penetrates through the first convex ring 154 and the first convex platform 155, and the first locking portion is arranged on the first convex platform 155. Among them, the groove depth of the guiding groove 151 is less than the wall thickness of the first convex platform 155, and the locking groove 152 penetrates through the wall thickness of the first convex platform 155.

[0095] In this embodiment, the groove depth of the guiding groove 151 is less than the wall thickness of the first convex platform 155 because the function of the guiding groove 151 is to guide the rotary cover 400 when it is inserted into the connection cavity 130, so there is no need to form a relatively large groove depth. If the groove depth of the guiding groove 151 with a guiding function is too large, it will instead reduce the strength of the adapter 150. And the locking groove 152 penetrates through the wall thickness of the first convex platform 155 to ensure that the second locking portion can reliably complete the clamping with the locking groove 152, improving the locking effect.

[0096] It is worth mentioning that, for the convenience of installing the adapter 150 at the opening 131 of the connection cavity, therefore, a first step 134 is provided at the opening 131 of the connection cavity, and the first step 134 forms an abutment with the first convex ring 154. Among them, a plurality of first connection holes 156 are annularly arranged on the first convex ring 154, and the first connection holes 156 are connected to the second connection holes 135 on the first step 134 through fasteners.

[0097] It is worth mentioning that the first connection holes 156 are countersunk holes, so that the tails of the fasteners are hidden in the first connection holes 156, preventing an assembly gap from being formed between the rotary cover 400 and the adapter 150 when the rotary cover 400 is inserted into the adapter 150.

[0098] In this embodiment, by providing the first step 134, it can not only serve as a positioning structure when the adapter 150 is connected to the connection cavity 130, but also make the diameter of the wall 132 of the connection cavity smaller than the diameter of the opening 131 of the connection cavity, thereby further blocking water vapor or dust from entering the connection cavity 130.

[0099] Preferably, the rotary cover 400 includes a second convex ring 430. At both ends along the axial direction of the second convex ring 430, a second convex platform 440 and a third convex platform 450 are respectively provided. The second locking portion and the concave cavity 420 are provided on the second convex platform 440, and the third convex platform 450 serves as a trigger portion. Among them, the first through groove 410 axially penetrates through the third convex platform 450, the second convex ring 430, and the second convex platform 440 in sequence. When the second convex platform 440 is inserted and cooperated with the second through groove 153, the second convex ring 430 abuts against the first convex ring 154.

[0100] It is further pointed out that the sum of the thicknesses of the first convex ring 154 and the second convex ring 430 is not greater than the distance between the side of the first step 134 in contact with the first convex ring 154 and the plane where the opening 131 of the connection cavity is located.

[0101] In this embodiment, since the sum of the thicknesses of the first convex ring 154 and the second convex ring 430 is not greater than the distance between the side of the first step 134 in contact with the first convex ring 154 and the plane where the opening 131 of the connection cavity is located, the side of the second convex ring 430 connected to the third convex platform 450 retracts into the opening 131 of the connection cavity, thereby further limiting the shaking of the rotary cover 400 during rotation and the shaking of the charging gun during movement, and improving the connection reliability between the first locking portion and the second locking portion.

[0102] Further preferably, the second locking portion includes a plurality of locking blocks 460, and the plurality of locking blocks 460 are annularly distributed along the outer peripheral surface of the second convex platform 440. Among them, the number of the locking blocks 460 corresponds to the number of the guiding grooves 151.

[0103] In this embodiment, the function of providing a plurality of locking blocks 460 is equivalent to the function of providing a plurality of guiding grooves 151 and locking grooves 152, which not only improves the locking reliability, but also matches the number of the guiding grooves 151 and the locking grooves 152.

[0104] It is worth mentioning that the side of the locking block 460 facing the opening 422 of the concave cavity is provided with an inclined surface, and the side of the locking block 460 facing the bottom 421 of the concave cavity is provided with a flat surface.

[0105] In this embodiment, one side of the locking block 460 facing the opening 422 of the concave cavity is set as an inclined surface, which facilitates the locking block 460 to quickly complete the insertion fit with the guiding groove 151 and improves the assembly efficiency. And one side of the locking block 460 facing the bottom 421 of the concave cavity is set as a flat surface, which can increase the contact area between the locking block 460 and the wall of the locking groove 152 and improve the locking effect.

[0106] Preferably, a second step 136 is provided on the wall 132 of the connection cavity, and a first seal 160 is provided between the first boss 155 and the second step 136. When the connector 300 is inserted into the connection cavity 130, it is nested and connected with the first seal 160. Among them, a plurality of first flanges 161 are provided on the outer peripheral surface of the first seal 160, and the plurality of first flanges 161 are distributed along the axial direction of the first seal 160.

[0107] In this embodiment, by providing a plurality of first flanges 161 on the outer peripheral surface of the first seal 160, and the first seal 160 is generally made of a flexible material such as rubber. When the first seal 160 is embedded in the connection cavity 130, the first flanges 161 on the first seal 160 will be squeezed and deformed, thereby increasing the friction between the first seal 160 and the wall 132 of the connection cavity, and further improving the waterproof and dustproof effect.

[0108] Preferably, a positioning structure is provided between one end of the connector 300 provided with the second terminal 320 and the bottom 133 of the connection cavity, and the positioning structure includes a positioning recess 330 provided on the connector 300 and a positioning protrusion 137 correspondingly provided on the bottom 133 of the connection cavity.

[0109] In this embodiment, by providing the positioning recess 330 and the positioning protrusion 137, the precise connection between the first terminal and the second terminal 320 can be realized. In addition, by providing the positioning recess 330 and the positioning protrusion 137, the first terminal and the second terminal 320 can be prevented from rotating circumferentially when being inserted and connected, and the quick connection between the first terminal and the second terminal 320 can be improved.

[0110] It is worth mentioning that the positions of the positioning recess 330 and the positioning protrusion 137 can be interchanged, that is, the positioning recess 330 is provided on the bottom 133 of the connection cavity, and the positioning protrusion 137 is provided on the connector 300.

[0111] Furthermore, it is pointed out that the cross-section of the positioning recess 330 and the cross-section of the positioning protrusion 137 are similarly triangular.

[0112] In this embodiment, the cross-sections of the positioning recess 330 and the positioning protrusion 137 are set to be triangular. The inclined plane where the hypotenuse of the triangle is located can achieve the quick alignment and insertion of the positioning recess 330 and the positioning protrusion 137, improving the assembly efficiency of the connector 300 and the charging gun body 100.

[0113] It is worth mentioning that since the connector 300 and the charging gun body 100 are separable structures, when it is necessary to calibrate the metering module 200 on the charging gun body 100 or maintain the charging gun body 100, the connection between the connector 300 and the charging gun body 100 needs to be disconnected. Under normal conditions, the connector 300 is inserted into the connection cavity 130. If you want to separate the two, the staff can only pull the cable 310 located outside the connection cavity 130 to pull out the connector 300 from the connection cavity 130. After the cable 310 is inserted and removed multiple times, it is easy for the cable 310 to become detached from the connector 300, resulting in the connector 300 being unable to be used normally. Therefore, in order to improve the reliability of the connector 300, an anti-disconnection module 350 can be provided inside the connector 300 to improve the anti-disconnection function of the cable 310.

[0114] Preferably, the connector 300 includes:

[0115] A housing 340, on which a first end face 341, a second end face 342 and a third through groove 343 for the cable 310 to run along the axis of the housing 340 are provided. Among them, the third through groove 343 penetrates the first end face 341, the second wiring terminal 320 penetrates the second end face 342, and the cable 310 is connected to the second wiring terminal 320. The second end face 342 is arranged as a plane;

[0116] An anti-disconnection module 350, located inside the housing 340, and the anti-disconnection module 350 includes:

[0117] A snap ring 351, which is clamped on the cable 310 and is close to the end connected to the second wiring terminal 320. And at least three contact areas 3511 are formed between the inner side wall of the snap ring 351 and the outer side wall of the cable 310 through the deformation of the snap ring 351. The relative sliding of the snap ring 351 and the cable 310 along the axis direction is limited by the contact areas 3511;

[0118] A limiting member 352, which is nested on the cable 310 and is located between the snap ring 351 and the first end face 341. And on both sides along the axis direction of the limiting member 352 are a first limiting portion 3521 and a second limiting portion 3522 respectively. Among them, the first limiting portion 3521 is in abutting cooperation with the snap ring 351, the second limiting portion 3522 is in abutting cooperation with the first end face 341, and the maximum edge diameter of the limiting member 352 is greater than the diameter of the third through groove 343 and less than the maximum diameter of the first end face 341.

[0119] In this embodiment, through the cooperation between the snap ring 351 and the cable 310, an integral structure is formed between the snap ring 351 and the cable 310, and there is no relative slip between the two. Through the abutment between the limiting member 352 and the snap ring 351 and the first end face 341, the degree of freedom of the snap ring 351 in the axial direction is limited, and further the degree of freedom of the cable 310 in the axial direction is limited, realizing the anti-disconnection function of the cable 310.

[0120] It is further pointed out that the first limiting portion 3521 is a first limiting surface, forming a surface-to-surface contact with the snap ring 351, and the second limiting portion 3522 is a second limiting surface, forming a surface-to-surface contact with the first end face 341.

[0121] It is worth mentioning that the contact between surfaces can provide a larger contact area compared with point or line contact, thereby improving the stability and reliability of the limit. In addition, due to the increase in the contact area, the force applied to the structural member can be more evenly distributed, reducing the occurrence of local stress concentration.

[0122] It is worth mentioning that the limiting member 352 is arranged in a circular sheet shape, such as a gasket.

[0123] Preferably, the contact area 3511 between the inner side wall of the deformed snap ring 351 and the outer side wall of the cable 310 can be line-to-surface contact or surface-to-surface contact.

[0124] It is worth mentioning that generally the outer contour of the cable 310 is circular. In order to ensure that the snap ring 351 can be easily clamped and matched with the cable 310, the through hole of the snap ring 351 is also set to be circular. However, this results in an assembly gap between the snap ring 351 and the cable 310. In order to eliminate the assembly gap between the two, the snap ring 351 is designed to have a deformation function, and the cable 310 also has a deformation function. Through the deformation of the snap ring 351 and the cable 310, the snap ring 351 and the cable 310 are made to form a whole. In this way, while limiting the axial movement of the snap ring 351, the axial movement of the cable 310 can be limited, thus achieving the purpose of preventing the cable 310 from disconnecting. And line-to-surface contact and surface-to-surface contact can increase the contact area between the snap ring 351 and the cable 310, further avoiding relative slip between the snap ring 351 and the cable 310.

[0125] It is further pointed out that the deformed snap ring 351 is arranged in a polygon. Further preferably, the deformed snap ring 351 is arranged in a hexagon or an octagon.

[0126] Preferably, an anti-twist portion 3523 is further provided on the first limiting portion 3521 of the limiting member 352, and the anti-twist portion 3523 is nested and matched with the snap ring 351. Among them, at least one limiting plane on the inner circumferential surface of the anti-twist portion 3523 is in surface contact with the outer circumferential surface of the snap ring 351.

[0127] It is worth mentioning that by providing the anti-twist portion 3523, the cable 310 is prevented from twisting inside the housing 340. When the cable 310 is subjected to repeated torsional stress, the conductor and the insulating layer inside may be damaged due to fatigue. By providing the anti-twist portion 3523, the influence of such stress on the cable 310 can be effectively reduced, and the service life of the cable 310 can be extended. In addition, the setting of the anti-twist portion 3523 helps to maintain the stability of the electrical performance inside the cable 310 and ensure the quality of signal transmission.

[0128] It is further pointed out that the contour shape of the anti-twist portion 3523 is the same as the contour shape of the snap ring 351. That is, the anti-twist portion 3523 is provided in a polygonal shape. Further preferably, the anti-twist portion 3523 is provided in a hexagonal shape or an octagonal shape.

[0129] Preferably, a second sealing member 353 is provided between the limiting member 352 and the first end face 341, and the second sealing member 353 is nested and matched with the cable 310. Among them, both sides of the second sealing member 353 along the axial direction are abutted against the limiting member 352 and the first end face 341 respectively.

[0130] It is worth mentioning that in the actual application process, the installation position of the charging gun may be outdoors or indoors. When the charging gun is installed outdoors, due to the changeable outdoor weather, it may be windy or rainy. The charging gun exposed to the air will be eroded by rainwater, resulting in rainwater or dust entering the charging gun, affecting the use safety and service life of the charging gun. In this embodiment, by providing the second sealing member 353 inside the connector 300, rainwater, water vapor or dust can be blocked from entering the charging gun, thus ensuring the use safety and service life of the charging gun.

[0131] In addition, by providing the second sealing member 353, the relative distance between the snap ring 351 and the first end face 341 is increased, and the second sealing member 353 has a certain strength, which can further realize the anti-disconnection function of the cable 310. If you want to pull out the cable 310 from the housing 340, a considerable amount of pulling force is required, which generally only occurs in destructive tests and cannot be pulled out of the housing 340 during normal use.

[0132] It is further pointed out that a plurality of second flanges 3531 are provided on the outer circumferential surface of the second sealing member 353, and the plurality of second flanges 3531 are distributed along the axial direction of the second sealing member 353.

[0133] In this embodiment, by providing a plurality of second flanges 3531 on the outer peripheral surface of the second seal 353, and the second seal 353 is generally made of a flexible material such as rubber. When the second seal 353 is embedded in the housing 340, the second flanges 3531 on the second seal 353 will be squeezed and deformed, thereby increasing the frictional force between the second seal 353 and the inner wall of the housing 340. On the one hand, it can further improve the waterproof and dustproof effect, and on the other hand, it can improve the anti-disengagement ability of the second seal 353, thereby further indirectly improving the anti-disengagement ability of the cable 310.

[0134] It is worth mentioning that the plurality of second flanges 3531 provided on the outer peripheral surface of the second seal 353 can also be set as external threads, and internal threads are provided on the inner wall of the housing 340. Through the screwing connection between the external threads and the internal threads, the same effect as described above can be achieved, and it is also convenient for the problem of aging and replacement of the second seal 353 after long-term use.

[0135] Preferably, at least two positioning plates 360 are further provided in the connector 300, and a plurality of positioning holes 361 are formed in the axial direction between the two positioning plates 360 and between the positioning plates 360 and the housing 340. Among them, the second terminal 320 includes a plurality of terminals, the plurality of terminals are connected to the cable 310, and the plurality of terminals are inserted into the plurality of positioning holes 361 correspondingly.

[0136] In this embodiment, by providing the positioning plate 360, on the one hand, it is convenient for the rapid assembly of the second terminal 320 and ensures that the angle and gap between any two adjacent terminals are constant. On the other hand, during the insertion and extraction process of the connector 300, the second terminal 320 will not shake inside the connector 300, improving the insertion and electrical connection effects. Thirdly, since the material of the positioning plate 360 is an insulating material, it can achieve a good insulating effect.

[0137] Preferably, the housing 340 includes a separable outer shell 344 and an end cover 345, and the outer shell 344 is hollow, and a third through groove 343 for the cable 310 to pass through is provided on the end cover 345. Among them, the first end face 341 is provided on the end cover 345, and the second end face 342 is provided on the outer shell 344.

[0138] In this embodiment, splitting the housing 340 into a separable outer shell 344 and an end cover 345 is convenient for the assembly of the connector 300 and the replacement of the cable 310.

[0139] It is further pointed out that since the housing 344 and the end cap 345 are separable structures, in order to facilitate the fixation and disassembly between the housing 344 and the end cap 345, and to provide a good limiting function in the fixed state, a detachable structure will be provided between the housing 344 and the end cap 345, and a part of the detachable structure is arranged on the side wall of the housing 344, and the other part of the detachable structure is arranged on the side wall of the end cap 345.

[0140] It is worth mentioning that the form of the detachable structure can be diverse, and can be a snap structure, a threaded structure, a pin structure, etc., not limited to the several ways described above.

[0141] For the sake of easy understanding, in this embodiment, the snap structure and the threaded structure are taken as examples for description.

[0142] When the detachable structure is a snap structure, the detachable structure includes a snap block 3441 and a snap groove 3451, and the snap block 3441 is arranged on one of the side walls of the housing 344 and the end cap 345, and the snap groove 3451 is arranged on the other of the side walls of the housing 344 and the end cap 345. Among them, through the snap fit between the snap block 3441 and the snap groove 3451, the connection between the housing 344 and the end cap 345 is realized.

[0143] It is further pointed out that when the snap block 3441 is arranged on the side wall of the housing 344 and the snap groove 3451 is arranged on the side wall of the end cap 345, the number of snap blocks 3441 and the number of snap grooves 3451 can be multiple, and the multiple snap blocks 3441 are arranged in a ring along the outer peripheral surface of the housing 344, and the snap groove 3451 is arranged in a ring along the side wall of the end cap 345 and penetrates through the side wall of the end cap 345.

[0144] Similarly, when the snap block 3441 is arranged on the side wall of the end cap 345 and the snap groove 3451 is arranged on the side wall of the housing 344, the number of snap blocks 3441 and the number of snap grooves 3451 can be multiple, and the multiple snap blocks 3441 are arranged in a ring along the inner peripheral surface of the end cap 345, and the snap groove 3451 is arranged in a ring along the side wall of the housing 344 and penetrates through the side wall of the end cap 345.

[0145] It is further pointed out that when the snap block 3441 is arranged on the outer peripheral surface of the housing 344 or the inner peripheral surface of the end cap 345, the radial cross-section of the snap block 3441 is in a trapezoidal structure, and among them, the inclined surface of the snap block 3441 is arranged as an arc-shaped curved surface.

[0146] When the detachable structure is a threaded structure, the detachable structure includes an external thread and an internal thread. The external thread is disposed on the outer peripheral surface of the housing 344, and the internal thread is disposed on the inner peripheral surface of the end cap 345. Wherein, the connection between the housing 344 and the end cap 345 is completed through the screwing between the external thread and the internal thread.

[0147] Preferably, the charging gun body 100 includes a gun body 170, and the gun body 170 is arranged in a spliced manner or an integrated manner. Wherein, when the gun body 170 is arranged in a spliced manner, it includes an upper cover 171 and a lower cover 172 that can be spliced up and down.

[0148] In this embodiment, the gun body 170 is spliced up and down, which facilitates the assembly of the internal structure of the charging gun body 100. In addition, the gun body 170 is formed by splicing the upper cover 171 and the lower cover 172 up and down. Therefore, the force direction is the radial direction, while the plugging and unplugging direction between the charging gun body 100 and the connector 300 is the axial direction. So the plugging and unplugging force generated by the two will not affect the splicing between the upper cover 171 and the lower cover 172, thus ensuring the strength and reliability of the charging gun body 100.

[0149] Preferably, the metering module 200 is used to calculate the two-way flowing electric quantity between the charging pile and the electric vehicle load.

[0150] Among them, the metering module 200 includes:

[0151] A collection circuit, which is configured to obtain the electrical parameter signals flowing through the cable;

[0152] A calculation circuit, which is configured to calculate the corresponding electrical parameter values according to the obtained electrical parameter signals;

[0153] A control circuit, which is configured to output corresponding control signals according to the instruction signals of the terminal or the electrical parameter values calculated by the calculation circuit to regularly send the electrical parameter values and the position information of the charging gun body to the terminal;

[0154] A communication circuit, which is configured to wirelessly send the electrical parameter values and the position data of the charging gun body to the terminal that has established a data connection with the charging gun body, and enable the terminal to determine the positioning information of the charging and discharging gun head device.

[0155] In this embodiment, the metering module is first integrated on the charging gun body, and then a communication circuit is set in the metering module to transmit the electrically parameter values detected in real time to the terminal, so as to obtain the accurate charging or discharging power of the vehicle. And when an abnormal situation occurs in the metering module, the fault type and the corresponding gun head position data can be sent to the terminal through the communication circuit in a timely manner. Then the terminal can judge which charging gun body is abnormal according to the data transmitted in real time, so as to accurately locate the charging and discharging gun head device that may have a fault. At the same time, the terminal can provide the optimal path planning for the maintenance or calibration personnel to reach the corresponding charging gun device fastest according to the position information of the charging gun body 100.

[0156] Preferably, the electrically parameter values calculated in the calculation circuit include but are not limited to various electrical parameters such as the electrical energy value flowing into or out of the vehicle load, the real-time current value, and the real-time voltage value.

[0157] Preferably, each circuit in the metering module is arranged on the same circuit board or on multiple different circuit boards, and the circuit board is fixed to the charging gun body by bolts or plug-in structures.

[0158] Preferably, in order to achieve more accurate acquisition of the voltage value of the cable 310, in addition to obtaining the voltage value through the sensor, the voltage detection circuit includes but is not limited to sampling the voltage values between the cable 310 and the live wire (L) and the neutral wire (N) by setting a voltage dividing resistor, using a voltage transformer, or adopting a voltage sensor based on the fluxgate principle or the Hall principle, and then transmitting the corresponding values to the terminal through the communication circuit for data display or fault diagnosis.

[0159] At the same time, in order to prevent the cable 310 from overheating during charging, in this embodiment, a temperature sensor is also provided. The temperature sensor is connected to the control circuit to obtain the real-time temperature value of the cable 310. The real-time temperature signal obtained by the temperature sensor will be transmitted to the calculation circuit, and the real-time temperature signal will be converted into the corresponding temperature value in the calculation circuit. Then this temperature value will be transmitted to the terminal through the communication circuit on the one hand, and on the other hand, it will be judged in the calculation circuit whether this temperature value exceeds the threshold, so as to be used as the basis for whether the control circuit output continues to execute the charging operation.

[0160] It should be noted that in the present invention, descriptions such as "first", "second", "one", etc. are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined. Terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0161] In addition, the technical solutions between various embodiments of the present invention can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0162] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A metering and separable AC charging gun, characterized in that, Including: A charging gun body (100) that is hollow inside, and the internal space of the charging gun body (100) is divided into an installation cavity (120) and a connection cavity (130) along its axial direction by a plunger head (110). A first wiring terminal (140) is provided on the plunger head (110). The first end of the first wiring terminal (140) is located inside the installation cavity (120) and extends out of the installation cavity (120) along the length direction of the installation cavity (120). The second end of the first wiring terminal (140) is located inside the connection cavity (130). A metering module (200), located inside the installation cavity (120), and the power consumption data measured by the metering module (200) is displayed on the charging gun body (100) or on the charging pile. A connector (300), one end of which is connected to a cable (310) electrically connected to the charging pile, and the other end is provided with a second wiring terminal (320). The end face where the second wiring terminal (320) is located is flat. When the connector (300) is inserted into the connection cavity (130), the second wiring terminal (320) and the first wiring terminal (140) form a male-female plug-in fit to complete the electrical connection between the connector (300) and the charging gun body (100). A rotary cover (400), on which a first through groove (410) for the cable (310) to pass through is provided, and the rotary cover (400) is detachably connected to the connection cavity (130). By rotating the rotary cover (400), the structure of the connector (300) inserted into the connection cavity (130) is locked or unlocked inside the connection cavity (130).

2. The metering and separable AC charging gun according to claim 1, wherein The connection cavity (130) includes a connection cavity opening (131), a connection cavity wall (132), and a connection cavity bottom (133). Among them, the first end of the first wiring terminal (140) penetrates the connection cavity bottom (133) and extends into the installation cavity (120), and extends along the length direction of the installation cavity (120). The second end of the first wiring terminal (140) is located inside the connection cavity (130) and extends towards the connection cavity opening (131). A first locking portion is provided on the connection cavity wall (132). The two ends along the axial direction of the rotary cover (400) are respectively a second locking portion and a trigger portion. When the second locking portion is inserted at the connection cavity opening (131), the trigger portion is located outside the connection cavity (130). By rotating the trigger portion, the locking or unlocking between the second locking portion and the first locking portion is completed.

3. The metering and separable AC charging gun according to claim 2, wherein, A concave cavity (420) is provided on the second locking portion, and the axis of the concave cavity (420) is coaxially arranged with the axis of the first through groove (410). Wherein, the concave cavity (420) includes a concave cavity bottom (421) and a concave cavity opening (422), and the first through groove (410) penetrates through the concave cavity bottom (421) and extends towards the concave cavity opening (422). The diameter of the first through groove (410) is smaller than the circumferential diameter of the concave cavity (420). When the second locking portion is inserted at the connecting cavity opening (131), one end of the cable (310) provided on the connector (300) abuts against the concave cavity bottom (421).

4. A metering and separable AC charging gun according to claim 3, characterized in that, The first locking portion includes a guiding groove (151) and a locking groove (152) which are located on the connecting cavity wall (132) and communicate with each other. The extending direction of the guiding groove (151) is consistent with the inserting direction of the rotary cap (400), and the extending direction of the locking groove (152) is consistent with the rotating direction of the rotary cap (400). Wherein, the second locking portion is in sliding fit with the guiding groove (151), and the second locking portion is in rotational fit with the locking groove (152).

5. The metering and separable AC charging gun according to claim 4, wherein The charging gun body (100) includes an adapter (150), and the adapter (150) is connected to the connecting cavity opening (131) through a fastener. Wherein, a second through groove (153) is arranged along the axial direction of the adapter (150), and the second locking portion is arranged on the groove wall of the second through groove (153).

6. A measurable and separable AC charging gun according to claim 5, characterized in that, The adapter (150) includes a first convex ring (154) and a first convex platform (155) which are connected to each other, and the diameter of the first convex ring (154) is larger than the diameter of the first convex platform (155). Wherein, the second through groove (153) penetrates through the first convex ring (154) and the first convex platform (155), and the first locking portion is arranged on the first convex platform (155). The depth of the guiding groove (151) is smaller than the wall thickness of the first convex platform (155), and the locking groove (152) penetrates through the wall thickness of the first convex platform (155).

7. A metering and separable AC charging gun according to claim 6, characterized in that, The rotary cap (400) includes a second convex ring (430). Second convex platforms (440) and third convex platforms (450) are respectively arranged at both ends along the axis direction of the second convex ring (430). The second locking portion and the concave cavity (420) are arranged on the second convex platform (440), and the third convex platform (450) serves as the triggering portion. Wherein, the first through groove (410) sequentially penetrates through the third convex platform (450), the second convex ring (430) and the second convex platform (440) along the axial direction. When the second convex platform (440) is in plug-in fit with the second through groove (153), the second convex ring (430) abuts against the first convex ring (154).

8. A metering and separable AC charging gun according to claim 7, characterized in that, A first step (134) is provided at the orifice (131) of the connection cavity, and the first step (134) abuts against the first convex ring (154). Among them, the sum of the thicknesses of the first convex ring (154) and the second convex ring (430) is not greater than the distance between the side of the first step (134) in contact with the first convex ring (154) and the plane where the orifice (131) of the connection cavity is located.

9. The metering and separable AC charging gun according to claim 8, characterized in that, A second step (136) is provided on the wall (132) of the connection cavity, and a first sealing member (160) is provided between the first boss (155) and the second step (136). When the connector (300) is inserted into the connection cavity (130), it is nested and connected with the first sealing member (160). Among them, multiple first flanges (161) are provided on the outer peripheral surface of the first sealing member (160), and the multiple first flanges (161) are distributed along the axial direction of the first sealing member (160).

10. A metering and separable AC charging gun according to claim 2, characterized in that, A positioning structure is provided between one end of the second terminal (320) provided on the connector (300) and the bottom (133) of the connection cavity. The positioning structure includes a positioning recess (330) or a positioning protrusion (137) provided on the connector (300), and the positioning protrusion (137) or the positioning recess (330) correspondingly provided on the bottom (133) of the connection cavity.

11. A metering and separable AC charging gun according to any one of claims 1 to 10, characterized in that, The connector (300) includes: A housing (340) provided with a first end face (341), a second end face (342), and a third through groove (343) for the cable (310) to run along the axial direction of the housing (340). Among them, the third through groove (343) penetrates the first end face (341), the second terminal (320) penetrates the second end face (342), and the cable (310) is connected to the second terminal (320). An anti-disconnection module (350) located inside the housing (340), and the anti-disconnection module (350) includes: A snap ring (351) clamped on the cable (310) and close to the end connected to the second terminal (320). At least three contact areas (3511) are formed between the inner side wall of the snap ring (351) and the outer side wall of the cable (310) through the deformation of the snap ring (351). The mutual sliding of the snap ring (351) and the cable (310) in the axial direction is defined by the contact areas (3511). The limiting member (352) is nested on the cable (310) and is located between the snap ring (351) and the first end face (341). On both sides along the axial direction of the limiting member (352) are a first limiting portion (3521) and a second limiting portion (3522). Wherein, the first limiting portion (3521) is in abutting cooperation with the snap ring (351), the second limiting portion (3522) is in abutting cooperation with the first end face (341), and the maximum edge diameter of the limiting member (352) is greater than the diameter of the third through groove (343) and less than the maximum diameter of the first end face (341).

12. A metering and separable AC charging gun according to claim 11, characterized in that, The contact area (3511) between the inner side wall of the deformed snap ring (351) and the outer side wall of the cable (310) is a line-surface contact or a surface-surface contact.

13. A metering and separable AC charging gun according to claim 11, characterized in that, A torsion prevention portion (3523) is further provided on the first limiting portion (3521) of the limiting member (352), and the torsion prevention portion (3523) is nested and cooperated with the snap ring (351). Wherein, at least one limiting plane on the inner circumferential surface of the torsion prevention portion (3523) is in surface-surface contact with the outer circumferential surface of the snap ring (351).

14. A metering and separable AC charging gun according to claim 11, characterized in that, A second sealing member (353) is provided between the limiting member (352) and the first end face (341), and the second sealing member (353) is nested and cooperated with the cable (310). Wherein, both sides of the second sealing member (353) along the axial direction are respectively abutted against the limiting member (352) and the first end face (341). A plurality of second flanges (3531) are provided on the outer circumferential surface of the second sealing member (353), and the plurality of second flanges (3531) are distributed along the axial direction of the second sealing member (353).

15. A metering and separable AC charging gun according to claim 11, characterized in that, At least two positioning plates (360) are further provided in the connector (300). Between the two positioning plates (360) and between the positioning plates (360) and the housing (340), a plurality of positioning holes (361) are formed along the axial direction. Wherein, the second terminal (320) includes a plurality of terminal ends, the plurality of terminal ends are connected to the cable (310), and the plurality of terminal ends are correspondingly inserted into the plurality of positioning holes (361).

16. A metering and separable AC charging gun according to claim 11, characterized in that, The housing (340) includes a separable outer shell (344) and an end cover (345), and the outer shell (344) is provided in a hollow manner. The end cover (345) is provided with a third through groove (343) for the cable (310) to pass through. Wherein, the first end face (341) is provided on the end cover (345), the second end face (342) is provided on the outer shell (344), and a detachable structure is provided between the outer shell (344) and the end cover (345). A part of the detachable structure is provided on the side wall of the outer shell (344), and another part of the detachable structure is provided on the side wall of the end cover (345).

17. The metering and separable AC charging gun according to claim 1, characterized in that, The charging gun body (100) includes a gun body (170), and the gun body (170) is provided in a spliced form or an integral form. Wherein, when the gun body (170) is provided in a spliced form, the gun body (170) includes an upper cover (171) and a lower cover (172) that can be spliced up and down.

18. A metering and separable AC charging gun according to claim 1, characterized in that, The metering module (200) is used to calculate the bidirectional flow of electricity between the charging pile and the electric vehicle load; the metering module (200) at least includes: An acquisition circuit, which is configured to acquire the electrical parameter signal flowing through the cable; A calculation circuit, which is configured to calculate the corresponding electrical parameter value according to the acquired electrical parameter signal; A control circuit, which is configured to output a corresponding control signal according to the instruction signal of the terminal or the electrical parameter value calculated by the calculation circuit to send the electrical parameter value and the position information of the gun head body to the terminal at regular intervals; A communication circuit, which is configured to wirelessly send the electrical parameter value and the position data of the gun head body to the terminal that has established a data connection with the gun head body, and enable the terminal to determine the positioning information of the charging and discharging gun head device.

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