A charging gun and a charging socket adapted thereto

Abstract

The present invention provides a charging gun, which includes a housing. The housing is provided with a socket, a main chamber and a cable chamber. The housing is also provided with an unlocking swing rod. One end of the unlocking swing rod facing the front end of the housing is provided with a locking hook, and the other end is provided with a button. The socket is provided with two plug columns that are parallel to each other and spaced apart. The plug column is provided with a locking section, a rotating section and a wiring driving section. The cross section of the locking section is polygonal and spirally twisted in the circumferential direction of the plug column while the cross-sectional contour on one side close to the front end of the locking section is reduced. The rotating section is rotatably matched with the socket. The wiring driving section is located in the main chamber. The outer wall of the wiring driving section is provided with teeth and the rear end face is provided with a first wiring hole; a rack meshing with both of them is arranged between the teeth of the wiring driving sections of the two plug columns, and the rack is adapted to the unlocking swing rod. The present invention has the advantages of reliable connection, effectively reducing wear and insertion and extraction resistance, and at the same time ensuring connection reliability.

Description

Technical Field

[0001] The present invention relates to the field of charging guns, and particularly to a charging gun and a charging socket adapted thereto. Background Art

[0002] With the popularization of new energy vehicles, their charging often needs to be carried out through the adaptation of a charging gun and a vehicle body charging socket. Currently, the charging time of new energy vehicles is often a major drawback. Therefore, innovations are generally made in the battery and charging pile to improve the charging efficiency. However, the charging gun and the vehicle body charging socket are in a state of frequent plugging and unplugging. The traditional plugging method uses a tight fit between the male head and the female head to meet the reliability of electrical connection. However, although the tight plugging fit ensures the effective current-carrying area between conductors, it will increase the plugging and unplugging resistance. For some users using home charging piles, the amount of electricity charged every night is often difficult to compare with that of fast charging stations. Therefore, almost every day, a plugging and unplugging operation is required. After the number of plugging and unplugging operations accumulates too much, the effective electrical contact area between the originally tightly fitted male head and female head will become smaller, resulting in an increase in current at the local contact part, causing heating, ablation, and molten welding, and easily posing a safety hazard, which also leads to the problems of difficult plugging in the early stage and reduced reliability in the later stage; for some public charging piles, due to their high charging frequency, the number of plugging and unplugging operations also increases accordingly, further exacerbating the wear. Summary of the Invention

[0003] Based on the above problems, the purpose of the present invention is to provide a charging gun and a charging socket adapted thereto that are reliably connected, effectively reduce wear and plugging and unplugging resistance, and at the same time ensure the connection reliability.

[0004] In view of the above problems, the following technical solution is provided: A charging gun includes a housing. A plugging seat is provided at the front end of the housing. A main chamber and a cable chamber that communicate with each other are provided inside the housing. A control groove is provided at the top of the housing. An electronic lock is provided in the control groove. The housing is further provided with an unlocking swing rod. One end of the unlocking swing rod facing the front end of the housing is provided with a locking hook, and the other end is provided with a button adapted to lock or unlock the electronic lock. Two parallel and spaced plugging columns are provided on the plugging seat. The front, middle, and rear sections of the plugging column are respectively a locking section, a rotating section, and a wiring driving section. The cross-section of the locking section is polygonal and spirally twisted in the circumferential direction of the plugging column while the cross-sectional contour on the side close to the front end of the locking section shrinks. The rotating section is rotatably fitted with the plugging seat. The wiring driving section is located in the main chamber. Gear teeth are provided on the outer wall of the wiring driving section, and a first wiring hole is provided on the rear end face. The spiral directions of the locking sections of the two plugging columns are opposite to each other. A rack that meshes with both of them is provided between the gear teeth of the wiring driving sections of the two plugging columns. One end of the rack is adapted to the unlocking swing rod, and when the button is pressed, the locking hook is unlocked, and at the same time, the rack drives the two plugging columns to rotate in the screwing-out direction of the locking section.

[0005] In the above structure, before the electronic lock is unlocked, the button on the unlocking swing rod cannot be pressed; after the electronic lock is unlocked, the button on the unlocking swing rod can be in a freely pressable state. After the button is pressed, while the locking hook swings, the unlocking swing rod pulls the rack, causing the rack to engage with the gear teeth and drive the insertion column to rotate. Since the rack is located between the two insertion columns, when the rack moves, the rotation directions of the two insertion columns are opposite to each other. Cooperating with the two locking sections with opposite helix directions on the two insertion columns, the synchronous screwing-out rotation of the locking sections after the button is pressed is realized; when the button or the locking hook is reset, the rack moves in the reverse direction, and the two insertion columns rotate in the reverse direction to realize screwing-in rotation; the locking section has a polygonal cross-section and a certain taper. Therefore, when screwing out and rotating, it can be directly separated from the rotary locking hole on the charging socket by using its taper after rotating a small angle, realizing frictionless removal. When inserting, there is a large gap between the locking section and the rotary locking hole in the early stage, realizing frictionless insertion. In the later stage of insertion, when the button or the locking hook is released and reset, while the outer wall of the locking section comes into contact with the inner wall of the rotary locking hole, it cooperates with the screwing-in rotation, and the outer wall of the helical polygonal cross-section of the locking section with a taper is adapted and screwed with the inner wall of the helical polygonal cross-section of the rotary locking hole with a taper to realize quick locking contact and conduction in a short distance in the insertion direction, ensuring the reliability of the electrical connection; the helix pitch of the locking section is in the ratio of 5-20:1 to its maximum rotary contour cross-section, and the circumferential helix angle between the maximum section and the minimum section of the locking section profile is preferably 60 degrees. At this time, the helix pitch of the locking section is preferably in the ratio of 10:1 to its maximum rotary contour cross-section; the polygonal cross-section of the locking section is preferably a hexagon, ensuring an effective locking effect while increasing the conductive contact area as much as possible; the charging cable enters the main chamber from the cable chamber and is then connected to the first wiring hole. The core of the charging cable is preferably a flexible wire to ensure its flexibility and torsional property and avoid affecting the rotation of the insertion column.

[0006] The present invention is further configured such that a tail cover is provided at the rear end of the socket, and an anti-disengagement shoulder is provided on the insertion column, and the anti-disengagement shoulder is located between the socket and the tail cover.

[0007] In the above structure, the tail cover is used to block the anti-disengagement shoulder of the insertion column to prevent the insertion column from axially displacing during rotation.

[0008] The present invention is further configured such that the anti-disengagement shoulder is located on the rotary section, and a first sealing ring adapted to seal with the socket is further provided on the rotary section.

[0009] In the above structure, the first sealing ring is used for sealing to prevent water vapor from entering the main chamber and the cable chamber.

[0010] The present invention is further configured such that the first sealing ring is located on the outer cylindrical wall of the anti-disengagement shoulder.

[0011] In the above structure, the outer diameter of the anti-shifting shoulder is relatively large, and an outer groove needs to be opened for the setting of the first sealing ring. Therefore, setting the first sealing ring on the outer cylindrical wall of the anti-shifting shoulder can effectively utilize the outer diameter difference of the anti-shifting shoulder and reduce the weakening of the conductive cross-section of the rotating section caused by opening the outer groove.

[0012] The present invention is further configured such that the plug socket further includes a grounding socket and a data socket. The grounding socket and the data socket are provided with pins, and a second wiring hole communicating with the main chamber is provided at the rear end of each pin. A pin shoulder is provided on the pin, and the pin shoulder is located between the plug socket and the tail cover.

[0013] In the above structure, after the data line and the grounding line enter the main chamber from the cable chamber, they are respectively connected to the second wiring holes on the pins of the grounding socket and the second wiring holes on the pins of the data socket.

[0014] The present invention is further configured such that a second sealing ring is provided on the pin and is in sealing cooperation with the plug socket, and the second sealing ring is located on the outer cylindrical wall of the pin shoulder.

[0015] In the above structure, the outer diameter of the pin shoulder is relatively large, and an outer groove needs to be opened for the setting of the second sealing ring. Therefore, setting the second sealing ring on the outer cylindrical wall of the pin shoulder can effectively utilize the outer diameter difference of the pin shoulder and reduce the weakening of the conductive cross-section of the pin caused by opening the outer groove.

[0016] The present invention is further configured such that the housing is provided with a sliding cylinder. The rack includes an engaging section located in the main chamber and engaged with the gear teeth, and a sliding section located in the sliding cylinder. A third sealing ring is provided on the outer wall of the sliding section and is in sealing cooperation with the inner wall of the sliding cylinder; one end of the sliding section facing away from the engaging section penetrates through the housing and a clamping head is provided at the end face, and a clamping groove engaged with the clamping head is provided on the unlocking swing rod.

[0017] In the above structure, setting the third sealing ring on the sliding section can ensure that external moisture will not enter the main chamber when the sliding section slides in the sliding cylinder; a necking is provided between the clamping head and the sliding section, and the two end faces of the clamping head are hemispherical, and the cross-section of the clamping groove is T-shaped or dovetail-shaped. Since the position of the clamping groove of the unlocking swing rod belongs to an arc movement microscopically when the unlocking swing rod swings, and the sliding section can only perform axial sliding in the sliding cylinder, setting the hemispherical surface can ensure that there is a space for relative sliding and swinging between the clamping groove and the clamping head, and avoid interference and collision between the two during movement.

[0018] The present invention is further configured such that a meshing gear is provided on the outer wall of the wiring driving section, and the gear teeth are located on the outer cylindrical wall of the meshing gear.

[0019] In the above structure, the meshing gear can increase the force arm from the gear teeth to the center of the wiring driving section and effectively improve the locking force.

[0020] The present invention is further configured such that a sealing cover is provided at the notch of the control groove. The sealing cover includes a flexible pressing cap. A pressing hole for placing the flexible pressing cap is formed in the sealing cover. The middle section of the unlocking swing rod is hinged to the sealing cover or the housing, and the button abuts against the inner wall of the flexible pressing cap correspondingly.

[0021] A charging socket adapted to a charging gun includes a base. A socket for inserting a socket base is provided on the base. A locking groove adapted to a locking hook is provided on the socket. A conductive sleeve is provided in the socket. The conductive sleeve is provided with a rotary locking hole. The inner wall of the rotary locking hole is polygonal and twists in a spiral shape in the circumferential direction of the conductive sleeve, and the cross-sectional contour of the end facing the charging gun is larger than that of the end far from the charging gun. When the charging gun is inserted, after the locking section is inserted into the rotary locking hole, it is locked with the rotary locking hole by screwing in and rotating. When the charging gun is pulled out, the locking section is separated from the rotary locking hole by screwing out and rotating.

[0022] In the above structure, in addition to the traditional locking of the locking hook and the locking groove between the charging gun and the charging socket, the rotary locking hole and the locking section can also be locked by screwing together, resulting in a double-locking effect. The cooperation between the rotary locking hole and the locking section ensures the plugging and unplugging convenience of the charging gun and the charging socket, reduces the plugging and unplugging force while ensuring the effective electrical contact area after insertion, reduces the plugging and unplugging wear, and greatly improves the plugging and unplugging durability.

[0023] Advantages of the present invention: Before the electronic lock is unlocked, the button on the unlocking swing rod cannot be pressed; after the electronic lock is unlocked, the button on the unlocking swing rod can be in a freely pressable state. After the button is pressed, while the locking hook swings, the unlocking swing rod pulls the rack, causing the rack to engage with the gear teeth and drive the insertion column to rotate. Since the rack is located between the two insertion columns, when the rack moves, the rotation directions of the two insertion columns are opposite to each other. Cooperating with the two locking sections with opposite helix directions on the two insertion columns, the synchronous screwing-out rotation of the locking sections is achieved after the button is pressed; when the button or the locking hook is reset, the rack moves in the reverse direction, and the two insertion columns rotate in the reverse direction to achieve screwing-in rotation; the locking section has a polygonal cross-section and a certain taper. Therefore, when screwing out and rotating, it can be directly separated from the rotary locking hole on the charging socket by using its taper after rotating a small angle, realizing frictionless removal. When inserting, there is a large gap between the locking section and the rotary locking hole in the early stage, realizing frictionless insertion. In the later stage of insertion, when the button is released or the locking hook is reset, while the outer wall of the locking section comes into contact with the inner wall of the rotary locking hole, it cooperates with the screwing-in rotation, and the outer wall of the spiral polygonal cross-section of the locking section with a taper is adapted and screwed together with the inner wall of the spiral polygonal cross-section of the rotary locking hole with a taper to realize quick locking contact and conduction in a short distance in the insertion direction, ensuring the reliability of the electrical connection; the helix pitch of the locking section is in a ratio of 5 - 20:1 to its maximum rotary contour cross-section. Among them, the circumferential spiral angle between the maximum section of the locking section cross-section contour and the minimum section of the cross-section contour is preferably 60 degrees. At this time, the helix pitch of the locking section is preferably in a ratio of 10:1 to its maximum rotary contour cross-section; the polygonal cross-section of the locking section is preferably a hexagon, ensuring an effective locking effect while maximizing the conductive contact area as much as possible; the charging cable enters the main chamber from the cable chamber and then is connected to the first wiring hole. The core of the charging cable is preferably a flexible wire to ensure its flexibility and torsional property and avoid affecting the rotation of the insertion column. Description of the Drawings

[0024] Figure 1 It is a schematic diagram of the overall structure of Embodiment 1 of the present invention.

[0025] Figure 2 It is a schematic diagram of the partial cross-sectional structure of Embodiment 1 of the present invention.

[0026] Figure 3 It is an exploded structure schematic diagram of Embodiment 1 of the present invention.

[0027] Figure 4 It is a schematic diagram of the structure of the insertion column and the rack of Embodiment 1 of the present invention.

[0028] Figure 5 It is a schematic diagram of the full cross-sectional structure of Embodiment 1 of the present invention.

[0029] Figure 6 It is a schematic diagram of the overall structure of Embodiment 2 of the present invention.

[0030] Figure 7Schematic diagram of the full-section structure of Embodiment 2 of the present invention.

[0031] Figure 8 For the present invention Figure 5 Schematic diagram of the enlarged structure of part A.

[0032] The meanings of the reference numerals in the figure are as follows: 10 - housing; 101 - sliding cylinder; 11 - socket; 111 - end cap; 112 - grounding socket; 113 - data socket; 114 - pin; 1141 - second wiring hole; 1142 - pin shoulder; 1143 - second sealing ring; 12 - main chamber; 13 - cable chamber; 14 - control groove; 15 - unlocking swing rod; 151 - locking hook; 152 - button; 153 - spring; 154 - engaging groove; 16 - plug post; 161 - locking section; 162 - rotating section; 1621 - anti - detachment shoulder; 1622 - first sealing ring; 163 - wiring driving section; 1631 - gear teeth; 1632 - first wiring hole; 164 - meshing gear; 17 - rack; 171 - meshing section; 172 - sliding section; 1721 - third sealing ring; 173 - engaging head; 1731 - hemispherical surface; 174 - necking; 18 - sealing cover; 181 - flexible pressing cap; 182 - pressing hole; 20 - base; 21 - socket; 211 - locking groove; 22 - conductive sleeve; 221 - rotating locking hole; 23 - grounding interface; 24 - data interface. Specific embodiments

[0033] The following combines the drawings and embodiments to further describe in detail the specific embodiments of the present invention. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0034] Refer to Figures 1 to 8 As Figures 1 to 8A charging gun shown in the figure includes a housing 10. A socket 11 is provided at the front end of the housing 10. A main chamber 12 and a cable chamber 13 that communicate with each other are provided inside the housing 10. A control groove 14 is provided at the top of the housing 10. An electronic lock (prior art, not shown in the figure) is provided in the control groove 14. The housing 10 is further provided with an unlocking swing rod 15. A locking hook 151 is provided at one end of the unlocking swing rod 15 facing the front end of the housing 10, and a button 152 adapted to be locked or unlocked with the electronic lock is provided at the other end. Two parallel and spaced plug columns 16 are provided on the socket 11. The front, middle, and rear sections of the plug column 16 are a locking section 161, a rotating section 162, and a wiring driving section 163 respectively. The cross-section of the locking section 161 is polygonal and is spirally twisted in the circumferential direction of the plug column 16 while the cross-sectional contour on the side close to the front end of the locking section 161 is reduced. The rotating section 162 is rotatably fitted with the socket 11. The wiring driving section 163 is located in the main chamber 12. A gear 1631 is provided on the outer wall of the wiring driving section 163, and a first wiring hole 1632 is provided on the rear end face. The spiral directions of the locking sections 161 of the two plug columns 16 are opposite to each other. A rack 17 that meshes with the gears 1631 of the wiring driving sections 163 of the two plug columns 16 is provided between the gears 1631. One end of the rack 17 is adapted to the unlocking swing rod 15, and when the button 152 is pressed, the locking hook 151 is unlocked, and at the same time, the rack 17 drives the two plug columns 16 to rotate in the screwing-out direction of the locking section 161.

[0035] In the above structure, before the electronic lock is unlocked, the button 152 of the unlocking swing rod 15 cannot be pressed; after the electronic lock is unlocked, the button 152 of the unlocking swing rod 15 can be in a freely pressable state. After the button 152 is pressed, while its locking hook 151 swings, the unlocking swing rod 15 pulls the rack 17, causing the rack 17 to engage with the tooth 1631 and drive the insertion column 16 to rotate. Since the rack 17 is located between the two insertion columns 16, when the rack 17 displaces, the rotation directions of the two insertion columns 16 are opposite to each other. Cooperating with the two locking sections 161 with opposite helix directions on the two insertion columns 16, the synchronous screwing-out rotation of the locking section 161 is realized after the button 152 is pressed; when the button 152 or the locking hook 151 is reset, in fact, the spring 153 on the unlocking swing rod 15 is used for resetting (prior art), the rack 17 displaces in the reverse direction, and the two insertion columns 16 rotate in the reverse direction to realize screwing-in rotation; the locking section 161 adopts a polygonal cross-section and has a certain taper. Therefore, when screwing out and rotating, it can be directly separated from the rotary locking hole 221 on the charging socket in (Embodiment 2) after rotating a small angle, realizing frictionless removal. When inserting, there is a large gap between the locking section 161 and the rotary locking hole 221 in the early stage, realizing frictionless insertion. In the later stage of insertion, when the button 152 or the locking hook 151 is released and reset, while the outer wall of the locking section 161 comes into contact with the inner wall of the rotary locking hole 221, it cooperates with the screwing-in rotation, and the outer wall of the spiral polygonal cross-section of the locking section 161 with a taper is screwed and engaged with the inner wall of the spiral polygonal cross-section of the rotary locking hole 221 with a taper, realizing quick locking contact and conduction in a short distance in the insertion direction, ensuring the reliability of the electrical connection; the helix pitch of the locking section 161 and its maximum rotary contour cross-section ratio is 5 to 20:1. Among them, the circumferential spiral angle between the maximum section and the minimum section of the cross-section contour of the locking section 161 is preferably 60 degrees. At this time, the helix pitch of the locking section 161 and its maximum rotary contour cross-section ratio is preferably 10:1; the polygonal cross-section of the locking section 161 is preferably a hexagon, ensuring an effective locking effect while maximizing the conductive contact area as much as possible; the charging cable (not shown in the figure) enters the main chamber 12 from the cable chamber 13 and is then connected to the first wiring hole 1632. The core of the charging cable is preferably a flexible wire, ensuring its flexibility and torsional property and avoiding affecting the rotation of the insertion column 16.

[0036] In this embodiment, a tail cover 111 is provided at the rear end of the socket 11, and an anti-disengagement shoulder 1621 is provided on the insertion column 16. The anti-disengagement shoulder 1621 is located between the socket 11 and the tail cover 111.

[0037] In the above structure, the tail cover 111 is used to block the anti-disengagement shoulder 1621 of the insertion column 16 to prevent the insertion column 16 from having an axial displacement when rotating.

[0038] In this embodiment, the anti - disengagement shoulder 1621 is located on the rotary section 162, and a first sealing ring 1622 adapted to be sealed with the socket 11 is also provided on the rotary section 162.

[0039] In the above structure, the first sealing ring 1622 is used for sealing to prevent water vapor from entering the main chamber 12 and the cable chamber 13.

[0040] In this embodiment, the first sealing ring 1622 is located on the outer cylindrical wall of the anti - disengagement shoulder 1621.

[0041] In the above structure, the outer diameter of the anti - disengagement shoulder 1621 is relatively large, and an outer groove needs to be opened for the setting of the first sealing ring 1622. Therefore, setting the first sealing ring 1622 on the outer cylindrical wall of the anti - disengagement shoulder 1621 can effectively utilize the outer diameter difference of the anti - disengagement shoulder 1621 and reduce the weakening of the conductive cross - section of the rotary section 162 caused by opening the outer groove.

[0042] In this embodiment, the socket 11 is further provided with a grounding socket 112 and a data socket 113. Plug pins 114 are provided in the grounding socket 112 and the data socket 113. A second wiring hole 1141 communicating with the main chamber 12 is provided at the rear end of each plug pin 114. A plug - pin shoulder 1142 is provided on the plug pin 114, and the plug - pin shoulder 1142 is located between the socket 11 and the end cap 111.

[0043] In the above structure, data lines (not shown in the figure) and ground lines (not shown in the figure) enter the main chamber 12 from the cable chamber 13 and are respectively connected to the second wiring holes 1141 on the plug pins 114 of the grounding socket 112 and the second wiring holes 1141 on the plug pins 114 of the data socket 113.

[0044] In this embodiment, a second sealing ring 1143 in sealing fit with the socket 11 is provided on the plug pin 114, and the second sealing ring 1143 is located on the outer cylindrical wall of the plug - pin shoulder 1142.

[0045] In the above structure, the outer diameter of the plug - pin shoulder 1142 is relatively large, and an outer groove needs to be opened for the setting of the second sealing ring 1143. Therefore, setting the second sealing ring 1143 on the outer cylindrical wall of the plug - pin shoulder 1142 can effectively utilize the outer diameter difference of the plug - pin shoulder 1142 and reduce the weakening of the conductive cross - section of the plug pin 114 caused by opening the outer groove.

[0046] In this embodiment, the housing 10 is provided with a sliding cylinder 101. The rack 17 includes an engaging section 171 located in the main chamber 12 and meshing with the gear teeth 1631, and a sliding section 172 located in the sliding cylinder 101. A third sealing ring 1721 is provided on the outer wall of the sliding section 172 and is in sealing cooperation with the inner wall of the sliding cylinder 101. One end of the sliding section 172 facing away from the engaging section 171 penetrates through the housing 10 and a clamping head 173 is provided on the end face. A clamping groove 154 for clamping with the clamping head 173 is provided on the unlocking swing rod 15.

[0047] In the above structure, the third sealing ring 1721 provided on the sliding section 172 can ensure that external water vapor does not enter the main chamber 12 when the sliding section 172 slides in the sliding cylinder 101. A necking 174 is provided between the clamping head 173 and the sliding section 172. The two end faces of the clamping head 173 are hemispherical surfaces 1731. The cross section of the clamping groove 154 is T-shaped or dovetail-shaped. Since the position of the clamping groove 154 is an arc movement microscopically when the unlocking swing rod 15 swings, and the sliding section 172 can only perform axial sliding in the sliding cylinder 101, the hemispherical surface 1731 is provided to ensure that there is a space for relative sliding and swinging between the clamping groove 154 and the clamping head 173, and to avoid interference and collision between the two during movement.

[0048] In this embodiment, a meshing gear 164 is provided on the outer wall of the wiring driving section 163, and the gear teeth 1631 are located on the outer cylindrical wall of the meshing gear 164.

[0049] In the above structure, the meshing gear 164 can increase the force arm from the gear teeth 1631 to the center of the wiring driving section 163, and effectively improve the locking force.

[0050] In this embodiment, a sealing cover 18 is provided at the notch of the control groove 14. The sealing cover 18 includes a flexible pressing cap 181. A pressing hole 182 for placing the flexible pressing cap 181 is provided on the sealing cover 18. The middle section of the unlocking swing rod 15 is hinged to the sealing cover 18 or the housing 10, and the button 152 abuts against the inner wall of the flexible pressing cap 181 correspondingly.

[0051] In this embodiment, Figure 4 The arrow shows the unlocking direction of the locking hook 151, the sliding direction of the rack 17, and the screwing-out direction of the locking section 161 after the button 152 is pressed; when locked, the unlocking direction of the locking hook 151, the sliding direction of the rack 17, and the screwing-out direction of the locking section 161 are opposite to Figure 4 the arrow direction shown.

[0052] Embodiment 2

[0053] Refer to Figures 1 to 8 As shown in Figure 6 and Figure 7A charging socket adapted to a charging gun, for adapting to the charging gun of Embodiment 1, includes a base 20. A socket 21 for inserting a socket base 11 is provided on the base 20, and a locking groove 211 adapted to a locking hook 151 is provided on the socket 21. A conductive sleeve 22 is provided in the socket 21. The conductive sleeve 22 is provided with a rotary locking hole 221. The inner wall of the rotary locking hole 221 is polygonal and spirally twisted in the circumferential direction of the conductive sleeve 22, and the cross-sectional contour of the end facing the charging gun is larger than that of the end away from the charging gun. When the charging gun is inserted, after the locking section 161 is inserted into the rotary locking hole 221, it is locked with the rotary locking hole 221 by screwing in and rotating. When the charging gun is pulled out, the locking section 161 is separated from the rotary locking hole 221 by screwing out and rotating.

[0054] In the above structure, in addition to the traditional adaptation of the locking hook 151 and the locking groove 211 for locking between the charging gun and the charging socket, the rotary locking hole 221 and the locking section 161 can also be locked by screwing together, resulting in a double-locking effect. The cooperation between the rotary locking hole 221 and the locking section 161 ensures the convenience of plugging and unplugging the charging gun and the charging socket, reduces the plugging and unplugging force while ensuring the effective electrical contact area after insertion, reduces the plugging and unplugging wear, and greatly improves the plugging and unplugging durability. A ground interface 23 and a data interface 24 are also provided in the socket 21.

[0055] Advantages of the present invention: Before the electronic lock is unlocked, the button 152 of the unlocking swing rod 15 cannot be pressed; after the electronic lock is unlocked, the button 152 of the unlocking swing rod 15 can be in a freely pressable state. After the button 152 is pressed, while the locking hook 151 swings, the unlocking swing rod 15 pulls the rack 17, causing the rack 17 to engage with the gear teeth 1631 to drive the insertion column 16 to rotate. Since the rack 17 is located between the two insertion columns 16, when the rack 17 is displaced, the rotation directions of the two insertion columns 16 are opposite to each other. Cooperating with the two locking sections 161 with opposite helix directions on the two insertion columns 16, the synchronous screwing-out rotation of the locking sections 161 is realized after the button 152 is pressed; when the button 152 or the locking hook 151 is reset, in fact, the spring 153 on the unlocking swing rod 15 is used for resetting (prior art), the rack 17 is displaced in the reverse direction, and the two insertion columns 16 rotate in the reverse direction to screw in; the locking section 161 has a polygonal cross-section and a certain taper. Therefore, when screwing out and rotating, it can be directly separated from the rotary locking hole 221 on the charging socket in (Embodiment 2) after rotating a small angle, realizing frictionless removal. When inserting, there is a large gap between the locking section 161 and the rotary locking hole 221 in the early stage, realizing frictionless insertion. In the later stage of insertion, when the button 152 or the locking hook 151 is released and reset, while the outer wall of the locking section 161 comes into contact with the inner wall of the rotary locking hole 221, it cooperates with the screwing-in rotation, and the outer wall of the locking section 161 with a tapered spiral polygonal cross-section is screwed and engaged with the inner wall of the rotary locking hole 221 with a tapered spiral polygonal cross-section to realize quick locking contact and conduction in a short distance in the insertion direction, ensuring the reliability of the electrical connection; the helix pitch of the locking section 161 and its maximum rotary contour cross-section ratio is 5-20:1. Among them, the circumferential spiral angle between the largest section and the smallest section of the cross-sectional contour of the locking section 161 is preferably 60 degrees. At this time, the helix pitch of the locking section 161 and its maximum rotary contour cross-section ratio is preferably 10:1; the polygonal cross-section of the locking section 161 is preferably hexagonal, ensuring an effective locking effect while increasing the conductive contact area as much as possible; the charging cable (not shown in the figure) enters the main chamber 12 from the cable chamber 13 and then is connected to the first wiring hole 1632. The core of the charging cable is preferably a flexible wire to ensure its flexibility and torsional property and avoid affecting the rotation of the insertion column 16.

[0056] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and modifications can be made. These improvements and modifications made under the above assumptions should also be regarded as the protection scope of the present invention.

Claims

1. A charging gun, comprising a housing, a plug socket is provided at the front end of the housing, a main chamber and a cable chamber that communicate with each other are provided inside the housing, a control groove is provided at the top of the housing, and an unlocking swing rod is further provided on the housing. A locking hook is provided at one end of the unlocking swing rod facing the front end of the housing, and a button is provided at the other end. It is characterized in that: The plug socket is provided with two plug posts that are parallel to each other and spaced apart. The front, middle, and rear sections of the plug post are a locking section, a rotating section, and a wiring driving section respectively. The cross-section of the locking section is polygonal and is spirally twisted in the circumferential direction of the plug post while the cross-sectional contour on the side closer to the front end of the locking section shrinks. The rotating section is rotatably engaged with the plug socket. The wiring driving section is located in the main chamber. The outer wall of the wiring driving section is provided with gear teeth and the rear end face is provided with a first wiring hole; the spiral directions of the locking sections of the two plug posts are opposite to each other, and a rack that meshes with both is provided between the gear teeth of the wiring driving sections of the two plug posts. One end of the rack is adapted to an unlocking swing rod and unlocks the locking hook after the button is pressed. At the same time, the rack drives the two plug posts to rotate in the screwing-out direction of the locking section; the housing is provided with a sliding cylinder. The rack includes an engaging section that meshes with the gear teeth in the main chamber and a sliding section that is located in the sliding cylinder. The outer wall of the sliding section is provided with a third sealing ring that is hermetically engaged with the inner wall of the sliding cylinder; one end of the sliding section facing away from the engaging section penetrates through the housing and the end face is provided with a clamping head, and the unlocking swing rod is provided with a clamping groove that clamps with the clamping head.

2. The charging gun according to claim 1, characterized in that: A tail cover is provided at the rear end of the plug socket. The plug post is provided with an anti-disengagement shoulder, and the anti-disengagement shoulder is located between the plug socket and the tail cover.

3. The charging gun according to claim 2, characterized in that: The anti-disengagement shoulder is located on the rotating section, and a first sealing ring that is hermetically engaged with the plug socket is further provided on the rotating section.

4. The charging gun according to claim 3, wherein: The first sealing ring is located on the outer cylindrical wall of the anti-disengagement shoulder.

5. The charging gun according to claim 2, characterized in that: The plug socket is further provided with a grounding socket and a data socket. Plug pins are provided in the grounding socket and the data socket. A second wiring hole that communicates with the main chamber is provided at the rear end of each plug pin. A plug pin shoulder is provided on the plug pin, and the plug pin shoulder is located between the plug socket and the tail cover.

6. The charging gun according to claim 5, characterized in that: A second sealing ring that is hermetically engaged with the plug socket is provided on the plug pin, and the second sealing ring is located on the outer cylindrical wall of the plug pin shoulder.

7. The charging gun according to claim 1, characterized in that: The outer wall of the wiring driving section is provided with an engaging gear, and the gear teeth are located on the outer cylindrical wall of the engaging gear.

8. The charging gun according to claim 1, wherein: A sealing cover is provided at the notch of the control groove. The sealing cover includes a flexible pressing cap. The sealing cover is provided with a pressing hole for placing the flexible pressing cap. The middle section of the unlocking swing rod is hinged to the sealing cover or the housing, and the button abuts against the inner wall of the flexible pressing cap correspondingly.

9. A charging socket adapted to the charging gun according to any one of claims 1 to 8, comprising a base, wherein a socket for inserting a socket base is provided on the base, and a locking groove adapted to a locking hook is provided on the socket; a conductive sleeve is provided in the socket, and it is characterized in that: The conductive sleeve is provided with a rotary locking hole. The inner wall of the rotary locking hole is polygonal and is spirally twisted in the circumferential direction of the conductive sleeve while the cross-sectional contour at the end facing the charging gun is larger than the cross-sectional contour at the end away from the charging gun; when the charging gun is inserted, after the locking section is inserted into the rotary locking hole, it is locked with the rotary locking hole through screwing rotation; when the charging gun is pulled out, the locking section is separated from the rotary locking hole through screwing-out rotation.

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