Self-locking plug and socket assembly and electric vehicle power supply device

Abstract

The utility model provides a self-locking plug and socket assembly and an electric vehicle power supply device, the self-locking plug and socket assembly comprises a plug and a socket, the plug comprises an insertion part, the insertion part is provided with two mutually independent groove structures, a positive pole, a negative pole and a communication line are respectively fixed in the two groove structures, and the plug and the socket are connected with the positive pole and the negative pole. The positive pole and the negative pole are both located at the central positions in the corresponding groove structures, and the communication lines are arranged around the corresponding positive pole or negative pole at intervals; a receiving groove is formed in the socket, two mutually independent convex block structures are arranged in the receiving groove, and an anode jack and a cathode jack are respectively formed in the two convex block structures; when the insertion part is inserted into the receiving groove, the bump structure is inserted into the corresponding groove structure, and the positive pole and the positive jack as well as the negative pole and the negative jack are inserted and electrically connected. According to the structure, the positive pole and the negative pole are positioned in the corresponding groove structures and are not exposed, so that the electrical safety is ensured, and more communication lines can be arranged conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of electric vehicles, in particular to a self-locking plug and socket assembly and an electric vehicle power supply device. Background Art

[0002] In the prior art, an electric vehicle is provided with a socket on the charger, and an electrical connection can be achieved when a power plug is plugged into the socket, thereby supplying power to the electric vehicle.

[0003] The sockets of existing electric two-wheeled vehicles basically all use a three-pin socket in the shape of a triangle. The ground pin, N pin, and L pin of the three plugs are in a triangle shape, among which the N pin and the L pin are in an outward-facing "X" shape. The N pin and the L pin are exposed, which poses a certain safety hazard and can no longer prevent the occurrence of danger caused by misuse of the charger.

[0004] The applicant has discovered that the prior art has at least the following technical problems: in the prior art, the positive and negative electrode pins are exposed, posing a safety hazard; and communication lines that are electrically connected to each other need to be set in the plug and the socket. Due to the limited space in the plug and the socket, the communication lines and the positive and negative electrode pins are difficult to arrange. Utility Model Content

[0005] The purpose of the utility model is to provide a self-locking plug and socket assembly and an electric vehicle power supply device to solve the technical problem of exposed positive and negative poles and potential safety hazards in the prior art; the many technical effects that can be produced by the preferred technical solution among the many technical solutions provided by the utility model are described in detail below.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] The utility model provides a self-locking plug and socket assembly, comprising a plug and a socket, wherein:

[0008] The plug comprises an insertion portion, the insertion portion is provided with two mutually independent groove structures, a positive pole, a negative pole and a communication line are respectively fixed in the two groove structures, the positive pole and the negative pole are both located at the center position of the corresponding groove structure, and the communication line is arranged around the corresponding positive pole or the negative pole at intervals;

[0009] A receiving groove is provided on the socket, and two independent protrusion structures are provided in the receiving groove, and a positive electrode socket and a negative electrode socket are respectively provided in the two protrusion structures; when the insertion part is inserted into the receiving groove, the protrusion structure is inserted into the corresponding groove structure, and the positive pole column and the positive electrode socket, and the negative pole column and the negative electrode socket are plugged and electrically connected.

[0010] Preferably, the groove structure comprises a first groove and a second groove for respectively fixing the positive electrode column and the negative electrode column, and there is a distance between the first groove and the second groove;

[0011] The protrusion structure includes a first protrusion and a second protrusion respectively fixing the positive electrode socket and the negative electrode socket. When the insertion portion is inserted into the receiving groove, the first protrusion is inserted into the first groove, the positive electrode column is plugged into and electrically connected to the positive electrode socket, and the second protrusion is inserted into the second groove, the negative electrode column is plugged into and electrically connected to the negative electrode socket.

[0012] Preferably, the first groove and the second groove are both square holes, the shapes of the first protrusion and the second protrusion are matched with the first groove and the second groove respectively, more than two communication lines are distributed around the positive pole and / or the negative pole, and more than two communication sockets are distributed around the positive pole socket and the negative pole socket, and the communication sockets are used to be plugged in with the communication lines and communicated.

[0013] Preferably, a positioning partition is provided at one end of the opposite side of the first groove and the second groove, and the positioning partition is located inside the corresponding groove. A positioning chamfer is provided at one end of the opposite side of the first protrusion and the second protrusion, and the positioning partition can only extend into the positioning chamfer to prevent the positive and negative poles from being connected in reverse.

[0014] Preferably, the self-locking plug and socket assembly also includes a locking rod assembly, which is rotatably connected to the plug, and a locking hook is provided on the locking rod assembly. A positioning groove is provided on the socket. After the plug is inserted into the socket, the locking rod assembly is rotated, and the locking hook can extend into the positioning groove and be clamped and fixed with the positioning groove, thereby locking the plug to the socket.

[0015] Preferably, the locking rod assembly comprises a rotating shaft, a locking rod and an abutting portion, wherein:

[0016] The locking rod is a U-shaped rod, the rotating shaft is fixed to the relatively inner side of the U-shaped rod, the rotating shaft is rotatably connected to the socket, the locking hook and the locking rod are an integrally formed structure, the abutting portion is formed at the end of the locking rod away from the hand-holding portion, the abutting portion is an arc-shaped structure, which is used to abut against the socket when the locking rod is lifted and rotated, thereby pulling out the plug.

[0017] Preferably, a positioning block is provided on the side wall of the socket, the positioning groove is formed on the positioning block, and the abutting portion is used to abut against the positioning block when the locking rod is lifted and rotated.

[0018] Preferably, one of the locking hook and the positioning groove is provided with a protrusion, and the other is provided with a slot, the locking hook extends into the positioning groove, and the protrusion can be fixedly engaged with the slot.

[0019] Preferably, a clearance groove is constructed between the lock hook and the lock rod, the clearance groove and the abutment portion are connected by an arc-shaped transition portion, a rib is arranged in the clearance groove, and an arc-shaped limiting groove is arranged on the side wall of the positioning groove, after the plug is inserted into the socket, the rib can rotate in the arc-shaped limiting groove when the lock rod rotates, thereby enabling the lock hook to be engaged or separated from the positioning groove.

[0020] Preferably, the clearance groove is an arc-shaped groove, the rib plate is an arc-shaped plate and is fixed to the concave side of the clearance groove, and the concave side of the arc-shaped plate is arranged toward the convex side of the arc-shaped limiting groove.

[0021] The utility model also provides an electric vehicle power supply device, comprising the self-locking plug and socket assembly.

[0022] Compared with the prior art, the self-locking plug and socket assembly and electric vehicle power supply device provided by the utility model have the following beneficial effects: the positive pole and the negative pole are located in the corresponding groove structure and are not exposed to the outside, so as to prevent short circuit; when the inserting part is inserted into the receiving groove, the convex block structure is inserted into the corresponding groove structure, and the positive pole and the positive pole jack, and the negative pole and the negative pole jack are plugged and electrically connected, so as to ensure the safety of electricity use; and the above arrangement of the positive pole, the negative pole and the communication line can facilitate the arrangement of more communication lines, so as to ensure that the electrical equipment can communicate normally and realize multi-party communication. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a structural schematic diagram of a self-locking plug and socket assembly;

[0025] Figure 2 yes Figure 1 A partial enlarged view of the middle A;

[0026] Figure 3 It is a schematic diagram of the structure of the socket;

[0027] Figure 4 This is a schematic diagram of the structure of the plug from another perspective;

[0028] Figure 5 This is a bottom view of the plug;

[0029] Figure 6 Schematic diagram of the structure of the locking rod assembly.

[0030] In the figure, 1, plug; 11, insertion part; 111, peripheral groove; 12, first groove; 13, second groove; 14, positive pole; 15, negative pole; 16, communication line; 17, positioning partition; 2, socket; 21, hanging ear; 22, receiving groove; 23, first protrusion; 24, second protrusion; 25, positive electrode jack; 26, negative electrode jack; 27, communication jack; 28, positioning chamfer; 31, locking rod; 32, rotating shaft; 33, abutment part; 4, locking hook; 41, slot; 5, positioning block; 51, positioning groove; 511, raised part; 52, arc-shaped limit groove; 6, clearance groove; 61, rib plate. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.

[0032] In the description of the present invention, it should be understood that the terms "center", "length", "width", "height", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "side" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0033] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Combine the following Figure 1-Figure 6 The technical solution provided by the utility model is described in more detail.

[0035] Embodiment 1:

[0036] In the prior art, the socket 2 of the electric two-wheeled vehicle basically adopts a three-pin socket in the shape of a triangle. The ground pin, N pin and L pin of the three-pin plug 1 are distributed in a triangle shape, wherein the N pin and the L pin are in an outward eight shape. This layout has a large area, and the N pin and the L pin are exposed to the outside, posing certain safety hazards, and cannot prevent the occurrence of danger caused by misuse of the charger.

[0037] For the above questions, see Figure 4 and Figure 5 As shown, the self-locking plug and socket assembly of this embodiment includes a plug 1 and a socket 2, the plug 1 includes an insertion part, the insertion part is provided with two independent groove structures, the two groove structures are respectively fixed with a positive pole, a negative pole and a communication line, the positive pole and the negative pole are both located at the center position of the corresponding groove structure, and the communication line is arranged around the corresponding positive pole or negative pole at intervals; a receiving groove is provided on the socket 2, the receiving groove is provided with two independent protrusion structures, the two protrusion structures are respectively provided with a positive pole jack and a negative pole jack; when the insertion part is inserted into the receiving groove, the protrusion structure is inserted into the corresponding groove structure, and the positive pole column and the positive pole jack, as well as the negative pole column and the negative pole jack are plugged and electrically connected.

[0038] Specifically, the insertion portion 11 is provided with a first groove 12 and a second groove 13, there is a gap between the first groove 12 and the second groove 13, and a positive electrode column 14 and a negative electrode column 15 are fixed in the first groove 12 and the second groove 13 respectively; Figure 3 As shown, the socket 2 is provided with a receiving groove 22, and a first protrusion 23 and a second protrusion 24 are provided in the receiving groove 22, and a positive electrode socket 25 and a negative electrode socket 26 are provided in the first protrusion 23 and the second protrusion 24 respectively; when the insertion part 11 is inserted into the receiving groove 22, the first protrusion 23 is inserted into the first groove 12, the positive electrode column 14 is plugged into and electrically connected with the positive electrode socket 25, and the second protrusion 24 is inserted into the second groove 13, and the negative electrode column 15 is plugged into and electrically connected with the negative electrode socket 26.

[0039] See also Figure 3 and Figure 5 As shown, the positive pole is located at the center of the first groove 12, the negative pole is located at the center of the second groove 13, and the communication lines are arranged around the corresponding positive pole or negative pole.

[0040] The above arrangement of the positive pole, negative pole and communication line can facilitate the arrangement of more communication lines, ensuring that the electrical equipment can communicate normally, such as serial port communication, and can realize multi-party communication.

[0041] In the above structure, the positive pole 14 and the negative pole 15 are respectively located in the first groove 12 and the second groove 13, and the positive pole jack 25 and the negative pole jack 26 are respectively located on the first protrusion 23 and the second protrusion 24, which can prevent the positive and negative poles from short-circuiting, reduce safety hazards, and facilitate the positive pole 14 and the negative pole 15 to be quickly inserted into the positive pole jack 25 and the negative pole jack 26.

[0042] As an alternative embodiment, see Figure 5 As shown, the first groove 12 and the second groove 13 are both square holes, see Figure 3 As shown, the shapes of the first protrusion 23 and the second protrusion 24 are matched with the first groove 12 and the second groove 13 respectively, and more than two communication lines 16 are distributed around the positive pole 14 and / or the negative pole 15, and more than two communication sockets 27 are distributed around the positive pole socket 25 and the negative pole socket 26. The communication sockets 27 are used to be plugged in with the communication line 16 and communicated.

[0043] The first groove 12 and the second groove 13 are both square holes, which can facilitate the arrangement of the communication line 16, the positive pole 14 or the negative pole 15, see Figure 5 As shown, in this example, four communication lines 16 are distributed around the positive pole 14. Compared with grooves of other shapes, the shapes of the first groove 12 and the second groove 13 in this embodiment can easily arrange more communication lines. Ensure that the electrical equipment can communicate normally, such as serial communication, and realize multi-party communication.

[0044] As an alternative embodiment, see Figure 5 As shown, a positioning partition 17 is provided at one end of the first groove 12 and the second groove 13 on the opposite side, and the positioning partition 17 is located inside the corresponding groove, see Figure 3 As shown, a positioning chamfer 28 is provided at one end of the opposite side of the first protrusion 23 and the second protrusion 24, and the positioning partition 17 can only extend into the positioning chamfer 28 to prevent the positive and negative poles from being connected in reverse.

[0045] If the plugging direction of the plug 1 is opposite, the positioning partition 17 and the positioning chamfer 28 do not correspond, and the insertion portion 11 of the plug 1 cannot be inserted into the receiving groove 22 of the socket 2. The above structure can prevent the position deviation and direction error of the plug 1, and facilitate the operator to correctly plug the plug 1 and the socket 2.

[0046] See also Figure 4 As shown, a peripheral groove 111 is provided on the plug 1, and a sealing ring can be nested on the peripheral groove 111, so as to facilitate the sealed plugging of the plug 1 and the socket 2, and play a role in waterproofing and dustproofing.

[0047] Embodiment 2:

[0048] In the prior art, when the power plug is inserted into the socket, on the one hand, when the electric vehicle vibrates, the power plug is easily vibrated and falls off from the socket; on the other hand, it takes a lot of force to plug and unplug the power plug from the socket, which is inconvenient to operate.

[0049] See also Figure 1-Figure 6 As shown, the self-locking plug and socket assembly provided by the utility model comprises a plug 1, a socket 2 and a locking rod assembly, wherein: the locking rod assembly is rotatably connected to the plug 1, a locking hook 4 is provided on the locking rod assembly, and a positioning groove 51 is provided on the socket 2. After the plug 1 is inserted into the socket 2, the locking rod assembly is rotated, and the locking hook 4 can extend into the positioning groove 51 and be clamped and fixed with the positioning groove 51, thereby locking the plug 1 on the socket 2.

[0050] The self-locking plug and socket assembly can be applied to the power supply of electric vehicles, such as Figure 3 As described, the socket 2 is provided with a hanging ear 21, and the hanging ear 21 is provided with a hole. The socket 2 is fixed to a charger such as a battery by screws or bolts, and when the plug 1 is electrically connected to the socket 2, power supply of the device can be realized.

[0051] In the self-locking plug and socket assembly of the present embodiment, after the plug 1 is inserted into the socket 2, the locking rod assembly is rotated, and the locking hook 4 can extend into the positioning groove 51 along the pressing direction and be fixedly engaged with the positioning groove 51, thereby locking the plug 1 on the socket 2, and preventing the plug 1 from falling off from the socket 2 when vibrated, making the connection structure of the plug 1 and the socket 2 more stable, thereby ensuring stable power supply for equipment such as electric vehicles, and by providing the locking rod assembly, it is easy to pull out the plug 1, which is convenient to use.

[0052] As an alternative embodiment, see Figure 1 , Figure 2 and Figure 6 As shown, the locking rod assembly of this embodiment includes a rotating shaft 32, a locking rod 31 and an abutment portion 33, wherein: the locking rod 31 is a U-shaped rod, the rotating shaft 32 is fixed to the relatively inner side of the U-shaped rod, the open end of the U-shaped rod is arranged toward the plug 1, the rotating shaft 32 is rotatably connected to the socket 2, the lock hook 4 and the locking rod 31 are an integrally formed structure, the abutment portion 33 is formed at one end of the locking rod 31 away from the hand-holding portion, and the abutment portion 33 is an arc-shaped structure, which is used to abut against the socket 2 when the locking rod 31 is lifted and rotated, thereby pulling out the plug 1.

[0053] See also Figure 1 As shown, the end of the locking rod 31 away from the abutting portion 33 is used for the user to hold. When the user holds the locking rod 31 at this part and rotates the locking rod 31 and pulls it, the abutting portion 33 rotates to a position abutting against the socket 2, see Figure 1As shown, specifically, as an optional embodiment, a positioning block 5 is provided on the side wall of the socket 2, a positioning groove 51 is formed on the positioning block 5, and the abutting portion 33 is used to abut against the positioning block 5 when the locking rod 31 is pulled and rotated. When the abutting portion 33 abuts against the positioning block 5, the locking rod 31 is equivalent to a lever, which is convenient for applying force, and the plug 1 can be pulled out of the socket 2 with more effort.

[0054] The abutting portion 33 has an arc-shaped surface. When the locking rod 31 rotates, the arc-shaped surface abuts against the upper surface of the positioning block 5, so that the positioning block 5 is evenly stressed and the plug 1 can be pulled out stably.

[0055] As an alternative embodiment, see Figure 2 As shown, one of the lock hook 4 and the positioning groove 51 is provided with a protrusion 511 , and the other is provided with a clamping groove 41 . The lock hook 4 extends into the positioning groove 51 , and the protrusion 511 can be clamped and fixed with the clamping groove 41 .

[0056] When the lock hook 4 is inserted into the positioning groove 51, it can be inserted and fixed. In order to further improve the stability of the connection structure, for details, see Figure 2 A protrusion 511 is provided on the inner wall of the positioning groove 51, and a card slot 41 is provided on the lock hook 4. When the lock hook 4 extends into the positioning groove 51, the protrusion 511 is card-engaged and fixed with the card slot 41, which can more stably realize the card-engagement and fixation of the lock hook 4 and the positioning groove 51, so that the plug 1 can be more stably locked on the socket 2.

[0057] As an alternative embodiment, see Figure 2 and Figure 6 As shown, a clearance groove 6 is constructed between the lock hook 4 and the lock rod 31, and the clearance groove 6 is connected to the abutment portion 33 through an arc-shaped transition portion. A rib plate 61 is arranged in the clearance groove 6, and an arc-shaped limiting groove 52 is arranged on the side wall of the positioning groove 51. After the plug 1 is inserted into the socket 2, the rib plate 61 can rotate in the arc-shaped limiting groove 52 when the lock rod 31 rotates, thereby making the lock hook 4 engage or separate with the positioning groove 51.

[0058] In the above structure, on the one hand, the matching structure of the arc-shaped limit groove 52 and the rib plate 61 facilitates the lock hook 4 to automatically enter the positioning groove 51 of the socket 2 along the pressing direction, thereby preventing mutual interference between the structures; on the other hand, the rib plate 61 can rotate in the arc-shaped limit groove 52 when the lock rod 31 rotates, so that the lock rod 31 can stably rotate under the limiting action of the arc-shaped limit groove 52, thereby facilitating the lock hook 4 to be engaged or separated from the positioning groove 51.

[0059] As an alternative embodiment, see Figure 2 As shown, the clearance groove 6 is an arc-shaped groove, the rib plate 61 is an arc-shaped plate and is fixed to the concave side of the clearance groove 6 , and the concave side of the rib plate 61 is arranged toward the convex side of the arc-shaped limiting groove 52 .

[0060] The above structure facilitates the rib plate 61 to stably rotate in the arc-shaped limiting groove 52 when the locking rod 31 rotates, thereby improving the stability of the structure.

[0061] Embodiment 3:

[0062] This embodiment provides an electric vehicle power supply device, including the above-mentioned self-locking plug and socket assembly.

[0063] The electric vehicle power supply device of this embodiment has the above-mentioned self-locking plug and socket assembly, so it also has the advantage of a more stable connection structure between the plug 1 and the socket 2, which can ensure stable power supply to the electric vehicle, and by providing the locking rod assembly, it is easy to pull out the plug 1, which is convenient to use.

[0064] In the description of this specification, specific features, structures or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0065] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0066] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A self-locking plug and socket assembly, characterized in that: It consists of a plug and a socket, where: The plug comprises an insertion portion, the insertion portion is provided with two mutually independent groove structures, a positive pole, a negative pole and a communication line are respectively fixed in the two groove structures, the positive pole and the negative pole are both located at the center position of the corresponding groove structure, and the communication line is arranged around the corresponding positive pole or the negative pole at intervals; A receiving groove is provided on the socket, and two independent protrusion structures are provided in the receiving groove, and a positive electrode socket and a negative electrode socket are respectively provided in the two protrusion structures; when the insertion part is inserted into the receiving groove, the protrusion structure is inserted into the corresponding groove structure, and the positive pole column and the positive electrode socket, and the negative pole column and the negative electrode socket are plugged and electrically connected.

2. The self-locking plug and socket assembly according to claim 1, characterized in that: The groove structure comprises a first groove and a second groove for fixing the positive electrode column and the negative electrode column respectively, and there is a distance between the first groove and the second groove; The protrusion structure includes a first protrusion and a second protrusion respectively fixing the positive electrode socket and the negative electrode socket. When the insertion portion is inserted into the receiving groove, the first protrusion is inserted into the first groove, the positive electrode column is plugged into and electrically connected to the positive electrode socket, and the second protrusion is inserted into the second groove, the negative electrode column is plugged into and electrically connected to the negative electrode socket.

3. The self-locking plug and socket assembly according to claim 2, characterized in that: The first groove and the second groove are both square holes, the shapes of the first protrusion and the second protrusion are matched with the first groove and the second groove respectively, more than two communication lines are distributed around the positive pole and / or the negative pole, and more than two communication sockets are distributed around the positive pole socket and the negative pole socket, and the communication sockets are used to be plugged in with the communication lines and communicated.

4. The self-locking plug and socket assembly according to claim 2, characterized in that: A positioning partition is provided at one end of the opposite side of the first groove and the second groove, and the positioning partition is located inside the corresponding groove. A positioning chamfer is provided at one end of the opposite side of the first protrusion and the second protrusion, and the positioning partition can only extend into the positioning chamfer to prevent the positive and negative poles from being connected in reverse.

5. The self-locking plug and socket assembly according to claim 1, characterized in that: The self-locking plug and socket assembly also includes a locking rod assembly, which is rotatably connected to the plug. A locking hook is provided on the locking rod assembly, and a positioning groove is provided on the socket. After the plug is inserted into the socket, the locking rod assembly is rotated, and the locking hook can extend into the positioning groove and be clamped and fixed with the positioning groove, thereby locking the plug on the socket.

6. The self-locking plug and socket assembly according to claim 5, characterized in that: The locking rod assembly comprises a rotating shaft, a locking rod and an abutting portion, wherein: The locking rod is a U-shaped rod, the rotating shaft is fixed to the relatively inner side of the U-shaped rod, the rotating shaft is rotatably connected to the socket, the locking hook and the locking rod are an integrally formed structure, the abutting portion is formed at the end of the locking rod away from the hand-holding portion, the abutting portion is an arc-shaped structure, which is used to abut against the socket when the locking rod is lifted and rotated, thereby pulling out the plug.

7. The self-locking plug and socket assembly according to claim 6, characterized in that: A positioning block is provided on the side wall of the socket, the positioning groove is formed on the positioning block, and the abutment portion is used to abut against the positioning block when the locking rod is pulled and rotated; One of the locking hook and the positioning groove is provided with a protruding portion, and the other is provided with a clamping groove. The locking hook extends into the positioning groove, and the protruding portion can be clamped and fixed with the clamping groove.

8. The self-locking plug and socket assembly according to claim 6, characterized in that: A clearance groove is constructed between the lock hook and the lock rod, and the clearance groove is connected to the abutment portion via an arc-shaped transition portion. A rib is arranged in the clearance groove, and an arc-shaped limiting groove is arranged on the side wall of the positioning groove. After the plug is inserted into the socket, the rib can rotate in the arc-shaped limiting groove when the lock rod rotates, thereby causing the lock hook to be engaged with or separated from the positioning groove.

9. The self-locking plug and socket assembly according to claim 8, characterized in that: The displacement groove is an arc-shaped groove, the rib plate is an arc-shaped plate and is fixed to the concave side of the displacement groove, and the concave side of the arc-shaped plate is arranged toward the convex side of the arc-shaped limiting groove.

10. An electric vehicle power supply device, characterized in that: It comprises a self-locking plug and socket assembly as described in any one of claims 1 to 9.

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