Electric vehicle charging plug and socket assembly

Abstract

The present invention discloses an electric vehicle charging plug and socket assembly, comprising a plug assembly and a locking assembly, wherein the plug assembly comprises a shell, a PIN needle group, a fixing block for fixing the PIN needle group, a connector and a conductive wire, and the locking assembly comprises a locking switch and a pressing switch, wherein the locking switch can be rotatably mounted on the shell of the plug assembly, the pressing switch connects the conductive wire and the conductive sheet in the plug assembly, and the conductive sheet is connected to an external cable, and only when the locking switch is placed at a specified position, the pressing switch can connect the conductive sheet and the conductive wire, and in addition, an isolation chamber is provided in the inner cavity of the pressing switch for isolating the contacts of the conductive wire and the conductive sheet, thereby preventing the generation of electric arc and having good safety performance.

Description

Technical Field

[0001] The invention relates to an electric vehicle charging plug and socket assembly, belonging to the technical field of cables and wires. Background Art

[0002] With the popularity of electric vehicles, charging equipment and charging equipment accessories have undergone new innovations. The charging plug is one of the indispensable products in the charging equipment. It is a tool for connecting electrical equipment and power supply. In addition to the basic power supply function, safety is more important in considering whether it is qualified. It is precisely because of safety considerations to prevent arcing at the moment of power-on that the charging plugs on the market adopt a locking structure. After the connection is confirmed, the power is turned on. It is more common to use a contact switch that is pressed to trigger the connection. However, this locking structure only requires one press, and the safety performance is still not enough. There are cases of accidental touch. In addition, it is found in practice that even if a locking mechanism is used, the product still has arcing due to imperfect internal detail processing. Summary of the invention

[0003] In view of the above problems existing in the prior art, the purpose of the present invention is to provide an electric vehicle charging plug and socket assembly, which optimizes the point contact structure through two locking structures, prevents the generation of electric arcs, and improves the safety performance of the product.

[0004] In order to achieve the above-mentioned invention object, the technical solution adopted by the present invention is as follows:

[0005] A plug and socket assembly for charging an electric vehicle, comprising a plug assembly and a locking assembly, wherein the plug assembly comprises a housing, a PIN needle group, a fixing block for fixing the PIN needle group, a connector and a conductive wire, wherein the PIN needle group is plugged into the fixing block, the fixing block is hinged to the connector, the conductive wire passes through the connector and is connected to the PIN needle group, the housing comprises a housing I nested in the outer wall of the connector and a housing II hinged to the housing I, bosses are symmetrically arranged on both sides of the edge of the housing I in contact with the housing II, a hole position I is arranged on the boss, a hole position II is arranged on the housing II at a position corresponding to the boss on the housing I, a hole position III and a buckle are arranged on the top of the housing II, the locking assembly comprises a locking switch and a pressing switch, the locking switch can be rotatably installed Installed on the shell of the plug assembly, the connection positions with the shell I and the shell II are respectively provided with protrusions I and protrusions II for rotation, protrusion I is installed in hole position I, and protrusion II is installed in hole position II. The locking switch is also provided with a cross bar I for controlling the pressing switch and a cross bar II that cooperates with the buckle. The pressing switch includes an outer cover, a button, a spring and a pressing piece. The bottom of the outer cover is hinged on the connector, the pressing piece is hinged to the button, the spring is nested in the outer wall of the pressing piece and abuts against the limiter on the bottom of the connector, the pressing piece is located on the upper part of the conductive wire and is not in contact, the button passes through the hole position III on the top of the shell II and is exposed, the conductive piece is located between the conductive wire and the pressing piece without contact, and the conductive piece is connected to the external cable.

[0006] Preferably, the limit piece on the bottom of the connector is an integrally formed arc-shaped protruding structure and together with the press-fit switch cover forms a closed isolation chamber, the bottom of the isolation chamber is a through hole for connecting the conductive wire, the spring resistance position is the edge position of the top of the isolation chamber, the top edge of the isolation chamber acts as a limit, and the spring pressing drives the pressing piece to move up and down. When the spring is pressed to the bottom, the pressing piece will press the conductive piece until it contacts the conductive wire.

[0007] More preferably, the isolation chamber surrounds the conductive wire, the pressed sheet and the conductive sheet, and the contact position after pressing is located in the isolation chamber. The isolation chamber acts as a protective cover. When the conductive wire, the pressed sheet and the conductive sheet contact each other, once an arc is generated, they will also be isolated and will not affect the outside.

[0008] Further preferably, the outer wall of the isolation chamber is made of LCP material, which has better heat resistance and arc resistance.

[0009] Preferably, the terminals of the compression-fitting sheet are in an arc shape, and the contact position between the conductive sheet and the compression-fitting sheet is also in an arc shape, so that tip discharge and arcing can be avoided when the contacts are in contact or disconnected.

[0010] Preferably, the position on the conductive sheet to be in contact with the pressing sheet and the conductive wire is made of phosphor bronze and is provided with a silver oxide coating to reduce the probability of arcing.

[0011] Preferably, the hole position I provided on the boss on the shell I is a hole position structure with an arc-shaped trajectory, which cooperates with the protrusion I on the locking switch to form a first locking structure, and the second locking structure is produced by the cooperation between the buckle on the shell II and the cross bar II on the locking switch.

[0012] More preferably, the center of the trajectory of the arc-shaped hole position I is the same as the center of the hole position II, so that the press-fit switch will produce an upward displacement to form a lock when pressed.

[0013] Preferably, the outer wall of the shell II is coated with nylon, which not only prevents the inner and outer membranes of the plug from falling off, but also puts the isolation room in an oxygen-deficient state, thereby reducing the ability of arc generation.

[0014] Compared with the prior art, the beneficial effects of the present invention are: through the two locking structures, the safety of the plug when it is powered on is improved, and an isolation chamber is set at the internal contact position to effectively block the contact arc, and detail processing is also adopted at the contact point to avoid the occurrence of tip discharge arcing when the arc-shaped contact is in contact or disconnected. In addition, in terms of material, the outer wall of the isolation chamber is made of LCP material, which has better heat resistance and arc resistance. The contact position of the conductive sheet with the pressing sheet and the conductive wire is made of phosphor bronze and is provided with a silver oxide coating to reduce the probability of arcing. The outer wall of the shell II is coated with nylon, which not only prevents the inner and outer membranes of the plug from falling off, but also makes the isolation chamber in an oxygen-deficient state, thereby reducing the ability to generate arcs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a preferred embodiment of an electric vehicle charging plug and socket assembly provided by the present invention;

[0016] Figure 2 It is a schematic diagram of an exploded view of a preferred embodiment of an electric vehicle charging plug and socket assembly provided by the present invention;

[0017] Figure 3 It is a schematic diagram of a locking switch of a preferred embodiment of an electric vehicle charging plug and socket assembly provided by the present invention;

[0018] Figure 4 It is a schematic cross-sectional view of an isolation chamber of a preferred embodiment of an electric vehicle charging plug and socket assembly provided by the present invention. DETAILED DESCRIPTION

[0019] The invention will be further described in detail and completely below in conjunction with the accompanying drawings and preferred embodiments.

[0020] Figure 1-4 This is a schematic diagram of a preferred embodiment of an electric vehicle charging plug and socket assembly provided by the present invention. Figure 1-4As shown, the electric vehicle charging plug and socket assembly includes a plug assembly 1 and a locking assembly 2. The plug assembly 1 includes a housing 101, a PIN needle group 102, a fixing block 103 for fixing the PIN needle group 102, a connector 104, and a conductive wire 105. The PIN needle group 102 is plugged into the fixing block 103, the fixing block 103 is hinged with the connector 104, the conductive wire 105 passes through the connector 104 and is connected to the PIN needle group 102, and the housing 101 includes a fixing block 103 for fixing the PIN needle group 102, a fixing block 103 for fixing the PIN needle group 102, a connector 104, and a conductive wire 105. The outer wall of the housing Ⅰ106 and the housing Ⅱ107 hinged to the housing Ⅰ106, the housing Ⅰ106 is symmetrically provided with bosses 108 on both sides of the edge in contact with the housing Ⅱ107, the bosses 108 are provided with hole positions Ⅰ109, the housing Ⅱ107 is provided with hole positions Ⅱ110 at positions corresponding to the bosses 108 on the housing Ⅰ106, the top of the housing Ⅱ107 is provided with hole positions Ⅲ111 and buckle 112, the locking assembly 2 includes a locking switch 201 and a pressing switch 202, the locking switch 201 can be rotatably installed The plug assembly 1 is mounted on the housing 101, and the connection positions with the housing Ⅰ106 and the housing Ⅱ107 are respectively provided with protrusions Ⅰ203 and protrusions Ⅱ204 for rotation, the protrusion Ⅰ203 is arranged in the hole position Ⅰ109, and the protrusion Ⅱ204 is arranged in the hole position Ⅱ110. The locking switch 201 is also provided with a cross bar Ⅰ205 for controlling the pressing switch 202 and a cross bar Ⅱ206 for matching with the buckle 112. The pressing switch 202 includes an outer cover 207, a button 208, a spring 209 and a locking mechanism 210. The outer cover 207 is hinged on the connector 104 at the bottom, the pressing piece 210 is hinged to the button 208, the spring 209 is nested in the outer wall of the pressing piece 210 and contacts the limit piece 113 on the bottom of the connector 104, the pressing piece 210 is located on the upper part of the conductive wire 105 and is not in contact with it, the button 208 passes through the hole III 111 on the top of the shell II 107 and is exposed, the conductive sheet 3 is located between the conductive wire 105 and the pressing piece 210 without contact, and the conductive sheet 3 is connected to the external cable.

[0021] It is worth noting that the stopper 113 on the bottom of the connector 104 is an integrally formed arc-shaped protruding structure and forms a closed isolation chamber 114 together with the outer cover 207 of the press-fit switch 202. The bottom of the isolation chamber 114 is a through hole for connecting the conductive wire 105. The spring 209 abuts at the edge of the top of the isolation chamber 114. The isolation chamber 114 surrounds the conductive wire 105, the press-fit sheet 210 and the conductive sheet 3. The contact point after press-fitting is located inside the isolation chamber 114, and the outside of the isolation chamber 114 is closed. The wall is made of LCP material, the terminal of the pressing piece 210 adopts an arc structure, the contact position between the conductive sheet 3 and the pressing piece 210 is also set to an arc shape, the contact position between the conductive sheet 3 and the pressing piece 210 and the conductive wire 105 is made of phosphor bronze material and is provided with a silver oxide coating, the hole position Ⅰ109 set on the boss 108 on the shell Ⅰ106 is a hole structure with an arc trajectory, the trajectory center of the arc hole position Ⅰ109 is the same as the center of the hole position Ⅱ110, and the outer wall of the shell Ⅱ107 is coated with nylon.

[0022] During the implementation process, firstly, the PIN needle group is plugged into the charging device. When the locking switch is in the initial position, the protrusion I is located at the bottom of the hole position I. The protrusion II on the locking switch is rotated around the hole position II on the outer wall of the shell II. Since the hole position I set on the boss on the shell I is a hole position structure with an arc trajectory, the center of the trajectory of the arc-shaped hole position I is the same as the center of the hole position II. Then, the protrusion I will slide around the hole position II in the arc-shaped hole position I. At this time, the cross bar I will gradually approach the button on the press switch, and the cross bar II will gradually move toward the button on the shell II. The buckle is close, when the protrusion I contacts the top of the hole position I and the stroke is completed, the cross bar II needs to be fixed with the buckle so that the cross bar I presses the button, and the bottom of the spring of the press-fit switch contacts the edge of the isolation chamber. When the button is pressed, the spring will squeeze downward to drive the press-fit sheet to move downward. In the initial position, there is no contact between the press-fit sheet and the conductive sheet, and between the conductive sheet and the conductive wire. When the locking switch is rotated to the bottom, the press-fit sheet will make the conductive sheet contact the conductive wire to form power-on, and the contact position is just located in the isolation chamber.

[0023] Compared with the prior art, the beneficial effects of the present invention are: through the two locking structures, the safety of the plug when it is powered on is improved, and an isolation chamber is set at the internal contact position to effectively block the contact arc, and detail processing is also adopted at the contact point to avoid the occurrence of tip discharge arcing when the arc-shaped contact is in contact or disconnected. In addition, in terms of material, the outer wall of the isolation chamber is made of LCP material, which has better heat resistance and arc resistance. The contact position of the conductive sheet with the pressing sheet and the conductive wire is made of phosphor bronze and is provided with a silver oxide coating to reduce the probability of arcing. The outer wall of the shell II is coated with nylon, which not only prevents the inner and outer membranes of the plug from falling off, but also makes the isolation chamber in an oxygen-deficient state, thereby reducing the ability to generate arcs.

[0024] Finally, it is necessary to explain here that the above embodiments are only used to further illustrate the technical solution of the present invention in detail and cannot be understood as limiting the scope of protection of the present invention. Some non-essential improvements and adjustments made by technicians in this field based on the above content of the present invention all fall within the scope of protection of the present invention.

Claims

1. An electric vehicle charging plug and socket assembly, comprising a plug assembly and a locking assembly, wherein the plug assembly comprises a housing, a PIN needle group, a fixing block for fixing the PIN needle group, a connector and a conductive wire, wherein the PIN needle group is plugged into the fixing block, the fixing block is hinged to the connector, and the conductive wire passes through the connector and is connected to the PIN needle group, wherein: The shell includes a shell I nested in the outer wall of the connector and a shell II hinged to the shell I. Bosses are symmetrically arranged on both sides of the edge of the shell I that contacts the shell II. A hole position I is arranged on the boss. A hole position II is arranged on the shell II at a position corresponding to the boss on the shell I. A hole position III and a buckle are arranged on the top of the shell II. The locking assembly includes a locking switch and a pressing switch. The locking switch can be rotatably installed on the shell of the plug assembly. A protrusion I and a protrusion II for rotation are respectively arranged at the connection positions with the shell I and the shell II. The protrusion I is arranged in the hole position I, and the protrusion II is arranged in the hole position II. The locking switch is also provided with a cross bar I for controlling the pressing switch and a cross bar II that cooperates with the buckle. The pressing switch includes an outer cover, a button, a spring and a pressing sheet. The bottom of the outer cover is hinged to the connector. The pressing sheet and the button are connected to each other. The button is hinged, the spring is nested in the outer wall of the pressing piece and abuts against the limit piece on the bottom of the connector, the pressing piece is located on the upper part of the conductive wire and is not in contact, the button passes through the hole III on the top of the shell II and is exposed, the conductive sheet is located between the conductive wire and the pressing piece without contact, the conductive sheet is connected to the external cable, the limit piece on the bottom of the connector is an integrally formed arc-shaped protruding structure and forms a closed isolation chamber together with the pressing switch cover, the bottom of the isolation chamber is a through hole for connecting the conductive wire, the spring abutment position is the edge position of the top of the isolation chamber, the isolation chamber surrounds the conductive wire, the pressing piece and the conductive sheet, and the contact position after pressing is located in the isolation chamber, the outer wall of the isolation chamber is made of LCP material, the pressing piece terminal adopts an arc-shaped structure, and the contact position between the conductive sheet and the pressing piece is also set to an arc shape.

2. The electric vehicle charging plug and socket assembly according to claim 1, characterized in that: The position on the conductive sheet to be in contact with the pressing sheet and the conductive wire is made of phosphor bronze and is provided with a silver oxide plating layer.

3. The electric vehicle charging plug and socket assembly according to claim 1, characterized in that: The hole position I arranged on the upper boss of the shell I is a hole position structure with an arc-shaped track.

4. The electric vehicle charging plug and socket assembly according to claim 3, characterized in that: The center of the trajectory of the arc-shaped hole position I is the same as the center of the hole position II.

5. The electric vehicle charging plug and socket assembly according to claim 1, characterized in that: The outer wall of shell II is coated with nylon.

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