DC charging gun electronic lock and DC charging gun

Abstract

The present invention discloses a DC charging gun electronic lock and a DC charging gun. The DC charging gun electronic lock of the present invention adopts electromechanical control for locking and unlocking control, wherein the pushing out and retracting of the locking push rod are driven by a driving motor, and the speed and state of locking and unlocking are stable and controllable; moreover, a detection switch is also provided in the DC charging gun electronic lock, which can accurately sense the locking and unlocking states of the locking push rod, thereby realizing accurate feedback control. In addition, the DC charging gun electronic lock of the present invention is also provided with a manual reset rocker arm, which can be conveniently, quickly, easily and reliably manually reset when the locking push rod fails after being pushed out. The DC charging gun of the present invention includes the DC charging gun electronic lock, which has good automatic locking and unlocking functions. When used for charging electric vehicles, locking and unlocking are stable and controllable, and manual unlocking can be easily and reliably performed in case of failure, with high safety performance.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile charging equipment, and in particular to a DC charging gun electronic lock and a DC charging gun. Background Art

[0002] With the development of automotive technology and changes in energy structures, electric vehicles are becoming a new trend. As electric vehicles become more common, charging stations are like refueling stations, providing convenient, anytime, anywhere access to energy. These stations contain a charging gun, similar to a gas pump, that plugs directly into the car's charging port.

[0003] During charging, to prevent the charging gun from detaching from the charging dock, a locking device is installed inside the charging gun. This device temporarily locks the charging gun and the charging port on the charging dock, ensuring a relatively stable connection between the charging gun and the charging port to ensure charging safety. After charging is complete, the charging gun can be unlocked and removed from the charging port.

[0004] During the charging process, DC charging guns can directly charge with DC power without the need for current conversion, making them convenient and fast. However, the locking structure of current DC charging guns typically uses electromagnetic principles for locking and unlocking, which requires high voltage accuracy and is difficult to achieve precise control. Furthermore, the electromagnetic locking and unlocking states are unstable, and the speed is prone to being too fast to trigger the feedback signal. Furthermore, while existing DC charging gun locking structures, such as the electronic locking device disclosed in patent CN209687073U, also use the electronic locking principle, these electronic locks are difficult to manually reset after locking in the event of a malfunction, and unlocking is cumbersome and can easily damage the charging gun locking device. Summary of the Invention

[0005] To address the existing issues of DC charging guns, such as low feedback monitoring accuracy, unstable locking and unlocking states, and difficulty in manual resetting, this invention provides an electronic lock for DC charging guns that uses electromechanical control for locking and unlocking, ensuring stable locking and unlocking states and enabling precise control.

[0006] Another object of the present invention is to provide a DC charging gun, which, based on the above-mentioned DC charging gun electronic lock, can achieve stable and precisely controlled locking and unlocking, and can be manually unlocked conveniently, quickly, easily and reliably in the event of a fault.

[0007] The purpose of the present invention is achieved through the following technical solutions.

[0008] A DC charging gun electronic lock, comprising a locking push rod and a drive motor;

[0009] One end of the locking push rod is a locking end, and the locking end is provided with a locking head; the other end of the locking push rod is provided with a rack, and the driving motor is meshed and connected with the rack through a gear set, and can drive the locking end of the locking push rod to be pushed out or retracted;

[0010] A manual reset rocker arm is also provided; when a failure occurs after the locking push rod is pushed out and the locking push rod cannot be retracted, the manual reset rocker arm can be manually rotated to drive the locking push rod to retract and return to its original position.

[0011] In a preferred embodiment, the gear set includes a driving gear and a driven gear; the output end of the drive motor is meshed and connected to the driving gear through a worm; the driving gear is transmission-connected to the driven gear, and there is a transmission virtual position between the driving gear and the driven gear; the driven gear is meshed and transmission-connected to the rack.

[0012] In a more preferred embodiment, the driven gear and the driving gear are connected by a semi-clutch transmission, wherein the driving gear has a driving transmission protrusion protruding inwardly toward the axis, and the outer periphery of the driven gear has a transmission engaging portion that engages with the driving transmission protrusion in the circumferential direction. When the driving gear rotates relative to the driven gear, when the driving transmission protrusion and the transmission engaging portion are not in contact, a transmission dummy space is left between the driving transmission protrusion and the transmission engaging portion.

[0013] In a more preferred embodiment, the meshing teeth on the driven gear that mesh with the rack are missing teeth.

[0014] In a further preferred embodiment, the missing tooth has a half tooth I, and the rack has a half tooth II corresponding to the half tooth I.

[0015] In a more preferred embodiment, the gear set and the drive motor are arranged on an intermediate housing; the intermediate housing has a cavity for embedding the drive motor, and a gear shaft for installing the driving gear, the driven gear and the worm.

[0016] In a preferred embodiment, a push rod return spring is sleeved on the locking push rod. When the locking push rod is pushed out, the push rod return spring is compressed; and after the external force pushing out the locking push rod is released, the compressed push rod return spring releases elastic potential energy, which can drive the locking push rod to retract and return to its original position.

[0017] In a more preferred embodiment, the manual reset rocker arm has a contact piece; the locking head has a card platform corresponding to the rotation direction of the contact piece, when the contact piece rotates in the direction of pushing out the locking push rod until it contacts the card platform on the locking head, the card platform on the locking head can block the rotation of the contact piece, and when the contact piece continues to rotate, it can push the locking head to continue to push out in the pushing direction;

[0018] When the locking push rod fails after being pushed out and cannot be retracted, the manual reset rocker arm can be rotated to drive the locking push rod to continue to be pushed out and further compress the push rod reset spring. After the external force on the manual reset rocker arm is released, the compressed push rod reset spring can drive the locking push rod to retract and return to its original position.

[0019] In a preferred embodiment, the locking head of the locking push rod is provided with a positioning hook; the manual reset rocker arm is provided with a limiting hook corresponding to the positioning hook; after the locking push rod is pushed into place, the positioning hook and the limiting hook are engaged with each other to limit the stroke of the locking push rod.

[0020] In a preferred embodiment, a manual reset torsion spring is sleeved on the manual reset rocker arm, which can elastically drive the manual reset rocker arm to reset after rotation.

[0021] In a more preferred embodiment, one end of the manual reset torsion spring is connected to act on the manual reset rocker arm, and the other end is connected to act on a fixed housing arranged outside the electronic lock.

[0022] In a preferred embodiment, the manual reset rocker arm is provided with a manual transmission connection portion, including a slot or a hexagonal boss.

[0023] In a preferred embodiment, a micro switch I is further provided for detecting whether the locking push rod is pushed out or retracted into position.

[0024] In a more preferred embodiment, the locking push rod has a positioning groove and a positioning protrusion; when the locking push rod is retracted into position, the positioning groove corresponds to the micro switch I; when the locking push rod is pushed out into position, the positioning protrusion corresponds to and abuts against the micro switch I, triggering the micro switch I; there is a transition slope between the positioning groove and the positioning protrusion.

[0025] A DC charging gun, comprising a charging gun button, a charging gun hook, and a charging gun electronic lock;

[0026] The charging gun button is configured to be retractable and pressurized on the charging gun housing via a button return spring; the middle portion of the charging gun hook is rotatably configured on the charging gun housing via a rotating shaft; the charging gun button corresponds to one end of the charging gun hook and can be pressed to cause the charging gun hook to tilt; a latching hook is provided on the other end of the charging gun hook, and the latching hook is located in front of the front end of the charging gun housing; the charging gun electronic lock is based on any of the above-mentioned DC charging gun electronic locks;

[0027] After the locking push rod is pushed out, the locking head of the locking push rod corresponds to the charging gun button and can tighten the pressed charging gun button, so that the charging gun button cannot be pressed.

[0028] In a preferred embodiment, the inner end side of the charging gun button has an extended protruding push-lock positioning column; after the locking push rod is pushed out, the locking head of the locking push rod corresponds to the push-lock positioning column of the charging gun button, and can tighten the pressed push-lock positioning column.

[0029] In a more preferred embodiment, the charging gun electronic lock is arranged in an electronic lock housing; and a locking positioning groove is provided on the electronic lock housing to accommodate the push-lock positioning column to extend into; after the locking push rod is pushed out, the locking head extends into the locking positioning groove and can prevent the push-lock positioning column from extending into.

[0030] In a preferred embodiment, a micro switch II corresponding to the charging gun hook is provided between the rotating shaft and the charging gun button; when the charging gun button is pressed to drive the charging gun hook to tilt, the tilted charging gun hook can trigger the micro switch II.

[0031] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0032] The DC charging gun electronic lock of the present invention adopts electromechanical control for locking and unlocking control, wherein the extension and retraction of the locking push rod are driven by a drive motor, and the speed and state of locking and unlocking are stable and controllable; moreover, a detection switch is also provided in the DC charging gun electronic lock, which can accurately sense the locking and unlocking status of the locking push rod, thereby realizing precise feedback control.

[0033] The DC charging gun electronic lock of the present invention is also equipped with a manual reset rocker arm, making manual reset convenient, fast, easy, and reliable. A push rod reset spring is sleeved on the locking push rod. During the process of pushing the locking push rod out, the push rod reset spring is compressed and elastically drives the locking push rod to reset. The manual reset rocker arm has a contact piece. If the locking push rod fails after being pushed out and cannot be retracted, the manual reset rocker arm is manually rotated, causing the contact piece on the manual reset rocker arm to push the locking push rod further out, thereby increasing the compression of the push rod reset spring. When the external force on the manual reset rocker arm is released, the locking push rod can be retracted and reset under the elastic drive of the push rod reset spring. The cam is in a state of semi-clutch connection with the driving gear, so that when the locking rod is manually reset and the locking rod is continuously pushed out, the rack on the locking rod and the driven gear, as well as the driven gear and the driving gear are in a state of transmission separation, so that the driving gear will not be transmitted during the retraction and reset of the locking rod. During the retraction and reset movement, there is no need to drive the driven gear, the driving gear, the worm and the driving motor to rotate, that is, there is no need to overcome the reverse thrust caused by the driven gear, the driving gear, the worm and the driving motor, so that the reset work is smaller. Especially when encountering a device failure caused by a stuck gear or the driving motor, the reset is still easy and reliable, which improves the convenience of resetting the locking rod and effectively reduces damage to the internal components of the electronic lock.

[0034] In addition, the manual reset rocker arm is equipped with a limit hook. Under normal operating conditions, the limit hook can limit the extension stroke of the locking push rod to prevent excessive extension of the locking push rod. Moreover, after the manual reset rocker arm rotates to a limit or manual reset, it can be elastically driven by the manual reset torsion spring to reset.

[0035] The DC charging gun of the present invention includes the DC charging gun electronic lock, which has good automatic locking and unlocking functions. When used to charge electric vehicles, locking and unlocking are stable and controllable, and manual unlocking can be easily and reliably performed in the event of a fault, with high safety performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a schematic diagram of the overall structure of the DC charging gun electronic lock of the present invention in a specific embodiment;

[0037] Figure 2a and Figure 2b They are schematic diagrams of the partial decomposition structure of the DC charging gun electronic lock of the present invention at different viewing angles in specific embodiments;

[0038] Figure 3 This is a schematic diagram of the overall decomposition structure of the DC charging gun electronic lock of the present invention in a specific embodiment.

[0039] Figure 4 Schematic diagram of the structure of the intermediate shell;

[0040] Figure 5a and Figure 5b They are schematic diagrams of the structure of the locking push rod at different viewing angles;

[0041] Figure 6 It is a schematic diagram of the combination of the driving gear and the driven gear;

[0042] Figure 7 Schematic diagram of the assembly relationship between the driving gear and the driven gear;

[0043] Figure 8 Schematic diagram of the structure of the manual reset rocker arm;

[0044] Figure 9 This is a schematic diagram of the assembly relationship between the locking push rod and the manual reset rocker arm when the locking push rod is further pushed out for manual reset;

[0045] Figure 10 The figure is a schematic diagram of the assembly relationship between the locking push rod and the manual reset rocker arm when the locking push rod is pushed into place;

[0046] Figure 11a and Figure 11b They are schematic diagrams of the structure of micro switch I detecting the extension and retraction of the locking push rod;

[0047] Figure 12a A schematic diagram of the assembly relationship between the locking push rod in the retracted state, the gear set, and the manual reset rocker arm;

[0048] Figure 12b A schematic diagram of the assembly relationship between the locking push rod in the pushed-out state, the gear set, and the manual reset rocker arm;

[0049] Figure 12c A schematic diagram of the assembly relationship between the locking push rod, the gear set, and the manual reset rocker arm during the manual reset process;

[0050] Figure 13 This is a structural schematic diagram of the DC charging gun of the present invention in a locked state in a specific embodiment;

[0051] Figure 14 This is a structural diagram of the DC charging gun of the present invention in an unlocked state in a specific embodiment;

[0052] Figure markings: 1-electronic lock housing, 101-main housing, 1010-locking positioning groove, 102-auxiliary housing, 2-intermediate housing, 201-motor cavity, 202-gear shaft, 203-micro switch accommodating groove, 3-driving motor, 4-locking push rod, 401-locking head, 402-rack, 4021-half tooth II, 403-connecting part, 404-positioning hook, 405-positioning groove, 406-positioning protrusion, 407-transition slope, 5-gear set, 501-driving gear, 5010-driving transmission protrusion, 502-driven gear, 5020-missing tooth, 502 1-half tooth I, 5022-transmission clamping part, 503-worm, 504-transmission virtual position, 6-manual reset rocker arm, 601-rocker arm body, 602-limit hook, 603-contact piece, 604-slot, 7-push rod return spring, 8-manual reset torsion spring, 9-micro switch I, 100-electronic lock, 200-charging gun hook, 2001-clamping hook, 300-charging gun button, 3001-press locking positioning column, 3002-press contact, 400-charging gun housing, 500-micro switch II, 600-button return spring, 700-rotating shaft, 800-charging base. DETAILED DESCRIPTION

[0053] The technical solution of the present invention is further described in detail below in conjunction with specific embodiments and drawings, but the protection scope and implementation methods of the present invention are not limited thereto. In the description of specific embodiments, it should be noted that the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", etc. is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the product of the invention is usually placed when in use, and the terms "Ⅰ", "Ⅱ", etc. are only used to distinguish the description, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the structure 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, let alone an indication or implication of relative importance.

[0054] Example 1

[0055] The DC charging gun electronic lock of this embodiment is Figures 1 to 3 As shown, the DC charging gun electronic lock includes a locking push rod 4 and a driving motor 3, as well as an electronic lock housing 1 that accommodates various components of the electronic lock.

[0056] The electronic lock housing 1 is composed of a main housing 101 and a secondary housing 102, which are molded together. The electronic lock components including the locking push rod 4 and the drive motor 3 are all housed in the cavity formed by the molded main housing 101 and the secondary housing 102. In this embodiment, an intermediate housing 2 for accommodating the drive motor 3 is also provided inside the electronic lock housing 1. Figure 4As shown, the intermediate shell 2 is integrally formed with a placement structure including a motor cavity 201 according to the structure of the placed parts. The drive motor 3 is placed in the motor cavity 201 of the intermediate shell 2 during assembly, and then the various parts including the drive motor 3 are assembled together with the intermediate shell 2 in the shell formed by the main shell 101 and the auxiliary shell 102.

[0057] The output end of the drive motor 3 is in transmission connection with the locking push rod 4, driving the locking push rod 4 to reciprocate. In this embodiment, a locking positioning groove 1010 is defined in the main housing 101 of the electronic lock housing 1. One end of the locking push rod 4 serves as a locking end, and a locking head 401 is formed on the locking end. The upper surface of the locking head 401 is a flat surface capable of achieving a tightening effect. On the DC charging gun, the charging gun button can be pressed and positioned to extend into the locking positioning groove 1010, thereby unlocking the gun. During the locking operation, the drive motor 3 drives the locking head 401 of the locking push rod 4 to move out into the locking positioning groove 1010, thereby blocking the locking positioning groove 1010 and tightening the downwardly pressed charging gun button, preventing the charging gun button from being pressed and positioned to extend into the locking positioning groove 1010, thereby preventing unlocking the gun. When the gun needs to be taken out, the driving motor 3 can drive the locking push rod 4 to retract and reset, and the locking head 401 leaves the locking positioning groove 1010 and retracts into the electronic lock housing 1. At this time, the charging gun button can be pressed and positioned to extend into the locking positioning groove 1010 to take out the gun.

[0058] In this embodiment, the driving motor 3 is connected to the rack 402 through the gear set 5 and can drive the locking end of the locking push rod 4 to be pushed out or retracted. Figure 5a and Figure 5b As shown, one end of the locking push rod 4 is a locking end, and the other end has a rack 402, with a connecting portion 403 between the two ends. The output end of the drive motor 3 is meshed with the rack 402 of the locking push rod 4 through the gear set 5. The meshing transmission drives the rack 402 of the locking push rod 4 to move, thereby driving the locking end to move, thereby driving the locking head 401 to push out and retract.

[0059] Optionally, the gear set 5 includes a driving gear 501 and a driven gear 502. A secondary gear is provided on the output end of the drive motor 3. The secondary gear is meshed and connected to the driving gear 501 via a worm 503. The driving gear 501 is in transmission connection with the driven gear 502, and the driven gear 502 is in transmission connection with the rack 402.

[0060] In this embodiment, the drive motor 3 and the gear set 5 are both arranged on the intermediate housing 2, the drive motor 3 is arranged in the motor cavity 201, and the output end passes through the motor cavity 201 and is sleeved with the secondary gear; a gear shaft 202 for assembling gears is provided on the intermediate housing 2, and the worm 503 is sleeved on a gear shaft 202 and is connected to the secondary gear transmission on the output end of the drive motor 3.

[0061] See also Figure 6 and Figure 7 As shown, the driving gear 501 has a driving transmission protrusion 5010 protruding inwardly toward the axis, and the outer periphery of the driven gear 502 has a transmission clamping portion 5022 that is circumferentially engaged with the driving transmission protrusion 5010 for transmission. The driving gear 501 and the driven gear 502 are coaxially sleeved on another gear shaft 202. During the rotation of the driving gear 501 relative to the driven gear 502, when the driving transmission protrusion 5010 and the transmission clamping portion 5022 are not in contact, a transmission dummy space 504 is left between the driving transmission protrusion 5010 and the transmission clamping portion 5022, and no transmission occurs between the driving gear 501 and the driven gear 502. When the driving gear 501 rotates until the driving transmission protrusion 5010 and the transmission clamping portion 5022 come into contact, the driving gear 501 drives the driven gear 502 to rotate through the engagement between the driving transmission protrusion 5010 and the transmission clamping portion 5022. Thus, a semi-clutch transmission connection is formed between the driving gear 501 and the driven gear 502 .

[0062] The DC charging gun electronic lock of this embodiment is also provided with a manual reset rocker arm 6. If the locking push rod 4 fails to retract after being pushed out due to a fault including a fault in the drive motor 3 or the gear set 5, manually rotating the manual reset rocker arm 6 can drive the locking push rod 4 to retract and return to its original position. This avoids the problem of the locking push rod 4 being unable to reset due to a fault after being pushed out, which could lead to the inability to remove the gun, or the need to disassemble the charging gun for removal due to the inability to remove the gun, which could cause damage to the charging gun.

[0063] In an optional embodiment, a push rod return spring 7 is sleeved on the connecting portion 403 of the locking push rod 4. The end of the push rod return spring 7, which is closest to the locking head 401, is connected to and acts on a fixed surface including the inner wall of the electronic lock housing 1 or the intermediate housing 2. In this embodiment, it is connected to and acts on the intermediate housing 2, while the end of the push rod return spring 7, which is further away from the locking head 401, is connected to and acts on the locking push rod 4. When the locking push rod 4 is pushed out, the push rod return spring 7 is compressed. After the external force pushing out the locking push rod 4 is released, the compressed push rod return spring 7 can drive the locking push rod 4 to retract and return to its original position.

[0064] See also Figure 8As shown, the manual reset rocker arm 6 includes a rocker arm body 601, and a contact piece 603 is provided on the rocker arm body 601 of the manual reset rocker arm 6. The locking head 401 has a card table corresponding to the contact piece 603 along the rotation direction. When the contact piece 603 rotates in the direction of pushing out the locking push rod 4 until it contacts the card table on the locking head 401, the card table on the locking head 401 can block the rotation of the contact piece 603, and when the contact piece 603 continues to rotate, it can push the locking head 401 to continue to be pushed out in the pushing direction.

[0065] In this way, when the locking push rod 4 fails after being pushed out and cannot be retracted, in the process of rotating the manual reset rocker arm 6 in the direction of pushing out the locking push rod 4, see Figure 9 As shown, the contact piece 603 contacts the locking head 401 of the locking push rod 4 and pushes the locking push rod 4 to continue to be pushed out, thereby further compressing the push rod return spring 7. When the external force on the manual reset rocker arm 6 is released, the compressed push rod return spring 7 can drive the locking push rod 4 to retract and return to its original position.

[0066] Furthermore, a manual reset torsion spring 8 is sleeved on the manual reset rocker arm 6 to elastically reset the rotated manual reset rocker arm 6. Specifically, one end of the manual reset torsion spring 8 is connected to the manual reset rocker arm 6, and the other end is connected to a fixed surface including the inner wall of the electronic lock housing 1 or the intermediate housing 2. In this embodiment, the manual reset torsion spring 8 is connected to the intermediate housing 2. When the manual reset rocker arm 6 rotates under the action of an external force, the manual reset torsion spring 8 rotates synchronously and accumulates elastic potential energy. When the external force is released, the manual reset torsion spring 8 releases the elastic potential energy and drives the manual reset rocker arm 6 to rotate and return to its original position.

[0067] Optionally, one end of the rocker arm body 601 of the manual reset rocker arm 6 is exposed outside the electronic lock housing 1, and a manual transmission connection portion is provided on the exposed portion of the manual reset rocker arm 6, including a slot or a hexagonal boss. In this embodiment, the manual transmission connection portion is a slot 604. When manual reset is required, the manual reset rocker arm 6 can be manually assisted by rotating it with a handle or the like having a structure adapted to the manual transmission connection portion, thereby completing manual reset conveniently and quickly.

[0068] Furthermore, in this embodiment, the meshing teeth on the driven gear 502 are missing teeth 5020, and a semi-clutch transmission connection is formed between the driving gear 501 and the driven gear 502. During manual resetting and continued pushing out of the locking push rod 4, the rack 402 on the locking push rod 4 will disengage from the meshing portion of the missing teeth 5020 on the driven gear 502. There is no transmission relationship between the rack 402 of the locking push rod 4 and the driven gear 502, and there is no need to drive the driving gear 501 to rotate. Therefore, the continued pushing out of the locking push rod 4 does not require driving the driven gear 502 to rotate, and further, there is no need to overcome the reverse thrust of the driving gear 501, the worm 503, and the drive motor 3. This reduces the work required for manual resetting. In particular, in the event of a device failure caused by a stuck gear set 5 or the drive motor 3, manual resetting remains easy and reliable, improving the convenience of resetting the locking push rod 4 and effectively reducing damage to the internal components of the electronic lock.

[0069] Furthermore, in this embodiment, the missing tooth 5020 has a half tooth I 5021, and the rack 402 has a half tooth II 4021 corresponding to the half tooth I 5021. During the meshing transmission between the missing tooth 5020 of the driven gear 502 and the rack 402 on the locking push rod 4, which drives the locking push rod 4, the mutual meshing of the half tooth I 5021 and the half tooth II 4021 effectively reduces the occurrence of tooth jamming and tooth jacking, thereby effectively improving the meshing stability and safety of the missing tooth 5020 and the rack 402.

[0070] During the normal locking and pushing out process of the locking push rod 4, in order to prevent the locking push rod 4 from being pushed out excessively, thereby causing the rack 402 to disengage from the missing tooth 5020 of the driven gear 502, and thus preventing the driving motor 3 and the gear set 5 from properly driving the locking push rod 4 to retract and reset, a limit structure is provided to limit the pushing out stroke of the locking push rod 4. In this embodiment, a positioning hook 404 is provided on the locking head 401 of the locking push rod 4, and a limiting hook 602 corresponding to the positioning hook 404 is provided on the manual reset rocker arm 6. During normal operation, see Figure 10 As shown, during the pushing-out process of the locking head 401 of the locking push rod 4 , the limiting barb 602 will contact and engage with the positioning barb 404 , thereby limiting the pushing-out stroke of the locking push rod 4 .

[0071] In addition, in the DC charging gun electronic lock of this embodiment, a micro switch I9 is also provided for detecting whether the locking push rod 4 is pushed out to the position or retracted to the position.

[0072] Optionally, the locking push rod 4, specifically at the end of the rack 402 in the pushing direction in this embodiment, has a positioning groove 405 and a positioning protrusion 406. The micro switch I9 is fixedly arranged on the intermediate housing 2, and the terminals of the micro switch I9 are connected to the two ends of the circuit. Figure 11a and Figure 11b As shown, when the locking push rod 4 is retracted, the in-position groove 405 corresponds to the micro switch I9, and the micro switch I9 is disconnected; when the locking push rod 4 is pushed out to the position, the in-position protrusion 406 corresponds to and abuts against the micro switch I9, causing the micro switch I9 to close and trigger the micro switch I9; and there is a transition slope 407 between the in-position groove 405 and the in-position protrusion 406. In this way, when the locking push rod 4 is pushed out to the position, the micro switch I9 closes and sends a corresponding electrical signal to detect that the locking push rod 4 has been pushed out to the position; and when the locking push rod 4 is retracted to the position, the micro switch I9 opens and sends a corresponding electrical signal to detect that the locking push rod 4 has been retracted to the position.

[0073] See also Figures 12a to 12c As shown, when the DC charging gun electronic lock of this embodiment is working, during the pushing and retracting process of the locking push rod 4, the driving motor 3 and the gear set 5 drive the locking push rod 4 to move forward or backward, and when it is pushed into place, the positioning hook 404 limits the pushing stroke of the locking push rod 4; when a fault occurs after the locking push rod 4 is pushed out and needs to be manually reset, the locking push rod 4 continues to be pushed out under the drive of the manual reset rocker arm 6, and the rack 402 of the locking push rod 4 is disengaged from the missing tooth 5020 on the driven gear 502. After releasing the external force on the manual reset rocker arm 6, the locking push rod 4 is pushed back and reset under the elastic action of the push rod reset spring 7.

[0074] Example 2

[0075] The DC charging gun of this embodiment is based on the DC charging gun electronic lock of Example 1.

[0076] See also Figure 13 and Figure 14 As shown, the DC charging cable includes a charging cable button 300, a charging cable hook 200, and an electronic lock 100. The charging cable button 300 is mounted on the charging cable housing 400 and can be pressed upwards. A button return spring 600 is located between the charging cable button 300 and the interior of the charging cable housing 400. When the charging cable button 300 is pressed downwards, the button return spring 600 is compressed and retains its elastic potential energy, releasing the pressing force. The elastic action of the button return spring 600 allows the charging cable button 300 to return upwards. The front end of the charging cable hook 200 is located forward of the front end of the charging cable housing 400. The middle portion of the charging cable hook 200 is rotatably mounted on the charging cable housing 400 via a rotating shaft 700. The charging cable button 300 corresponds to the rear end of the charging cable hook 200 and can be pressed to cause the front end of the charging cable hook 200 to tilt. Furthermore, a latching hook 2001 is located on the front end of the charging cable hook 200.

[0077] When the DC charging gun is mounted on the charging base 800, the hook 2001 of the charging gun hook 200 located in front of the front end of the charging gun housing 400 engages with the groove on the charging base 800, securing the DC charging gun in place. To remove the gun, the charging gun button 300 is pressed downward to disengage the hook 2001 of the charging gun hook 200 from the groove on the charging base 800, allowing the DC charging gun to be removed.

[0078] The charging gun electronic lock 100 of this embodiment is based on the DC charging gun electronic lock described in Example 1. In this embodiment, the charging gun electronic lock 100 is disposed within an electronic lock housing 1 , and the locking and positioning groove 1010 on the electronic lock housing 1 corresponds to the charging gun button 300 .

[0079] Optionally, the inner end of the charging gun button 300 has a protruding push-lock positioning post 3001. Furthermore, the push-lock positioning post 3001 corresponds to the locking positioning groove 1010 and can be directed to extend into the locking positioning groove 1010 when the charging gun button 300 is pressed.

[0080] In addition, there is a raised pressing contact 3002 on the inner end side of the charging gun button 300. The pressing contact 3002 contacts the rear end of the charging gun hook 200 and can directly press the rear end of the charging gun hook 200 downward when the charging gun button 300 is pressed, thereby causing the front end of the charging gun hook 200 to tilt.

[0081] The DC charging gun of this embodiment can achieve a stable connection with the charging port of the charging base during the charging process through the locking effect of the charging gun electronic lock 100, and the DC charging gun can be easily removed by unlocking after charging is completed. In the specific working process, after the locking push rod 4 is pushed out, the locking head 401 of the locking push rod 4 extends into the locking positioning groove 1010 and corresponds to the pressing locking positioning column 3001 of the charging gun button 300. The locking head 401 will press the charging gun button 300 pressed downward, so that the charging gun button 300 cannot be pressed, thereby preventing the front end of the charging gun hook 200 from tilting. The engaging hook 2001 at the front end of the charging gun hook 200 remains engaged and locked with the groove on the charging base 800, so that the DC charging gun cannot be removed; and during the locking process, the DC charging gun cannot be removed. After the push rod 4 retracts, the locking positioning groove 1010 is not blocked. When the charging gun button 300 is pressed downward, the locking positioning column 3001 can be extended into the locking positioning groove 1010, and in the process of pressing the charging gun button 300, the pressing contact 3002 will touch the rear end of the charging gun hook 200, thereby causing the front end of the charging gun hook 200 to tilt, and the engaging hook 2001 at the front end of the charging gun hook 200 is disengaged from the groove on the charging seat 800, and the DC charging gun is disengaged from the charging seat 800, so that the DC charging gun can be removed smoothly.

[0082] In addition, in a preferred embodiment, a microswitch II 500 is provided between the rotating shaft 700 and the charging gun button 300, corresponding to the charging gun hook 200. The intermediate housing 2 has a microswitch receiving slot 203 for accommodating the microswitch II 500. The microswitch II 500 is placed in the microswitch receiving slot 203, located between the rotating shaft 700 and the charging gun button 300, and corresponding to the charging gun hook 200. When the charging gun button 300 is pressed downward, causing the front end of the charging gun hook 200 to tilt, the rear end of the charging gun hook 200 swings downward and triggers the microswitch II 500, which then sends a corresponding signal to detect the removal of the charging gun.

[0083] The above embodiments are merely preferred embodiments of the present invention and are intended to provide a further detailed description of the technical solutions of the present invention. However, the scope of protection and implementation of the present invention are not limited thereto. Any changes, combinations, deletions, replacements, or modifications that do not depart from the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A DC charging gun electronic lock, characterized in that: including a locking push rod and a driving motor; One end of the locking push rod is a locking end, and the locking end is provided with a locking head; the other end of the locking push rod is provided with a rack, and the driving motor is meshed and connected with the rack through a gear set, and can drive the locking end of the locking push rod to be pushed out or retracted; A push rod return spring is sleeved on the locking push rod. When the locking push rod is pushed out, the push rod return spring is compressed. When the external force pushing out the locking push rod is released, the compressed push rod return spring can drive the locking push rod to retract and return to its original position. A manual reset rocker arm is also provided; when the locking push rod fails after being pushed out and cannot be retracted, the manual reset rocker arm can be manually rotated to drive the locking push rod to continue to be pushed out, and after the external force on the manual reset rocker arm is released, the compressed push rod reset spring can drive the locking push rod to retract and return to its original position; The gear set includes a driving gear and a driven gear; the output end of the drive motor is meshed and connected to the driving gear through a worm; the driving gear and the driven gear are coaxially connected, and there is a transmission gap between the driving gear and the driven gear; the driven gear is meshed and connected to the rack; The driving gear has a driving transmission protrusion protruding inwardly toward the axis, and the outer periphery of the driven gear has a transmission engaging portion that engages with the driving transmission protrusion in the circumferential direction. The driving gear and the driven gear are coaxially sleeved on another gear shaft. When the driving gear rotates relative to the driven gear, when the driving transmission protrusion is not in contact with the transmission clamping portion, there is a transmission virtual position left between the driving transmission protrusion and the transmission clamping portion, and no transmission occurs between the driving gear and the driven gear; and when the driving gear rotates until the driving transmission protrusion is in contact with the transmission clamping portion, the driving gear will drive the driven gear to rotate through the clamping cooperation between the driving transmission protrusion and the transmission clamping portion; thereby, a semi-clutch transmission connection is formed between the driving gear and the driven gear.

2. A DC charging gun electronic lock according to claim 1, characterized in that: The meshing tooth on the driven gear meshing with the rack is a missing tooth; and the missing tooth has a half tooth I, and the rack has a half tooth II corresponding to the half tooth I.

3. The DC charging gun electronic lock according to claim 1, characterized in that: The manual reset rocker arm is provided with a contact piece; when the contact piece rotates in the direction of pushing out the locking push rod until it contacts the locking head, the locking head can block the rotation of the contact piece, and when the contact piece continues to rotate, it can push the locking head to continue to be pushed out in the pushing direction.

4. The DC charging gun electronic lock according to claim 1, characterized in that: The locking head of the locking push rod is provided with a positioning hook; the manual reset rocker arm is provided with a limiting hook corresponding to the positioning hook; after the locking push rod is pushed into place, the positioning hook and the limiting hook are engaged with each other to limit the stroke of the locking push rod.

5. The DC charging gun electronic lock according to claim 1, characterized in that: The manual reset rocker arm is sleeved with a manual reset torsion spring, which can elastically drive the rotated manual reset rocker arm to reset.

6. The DC charging gun electronic lock according to claim 1, characterized in that: The manual reset rocker arm is provided with a manual transmission connection portion, which includes a slot or a hexagonal boss.

7. A DC charging gun electronic lock according to any one of claims 1 to 6, characterized in that: A micro switch I is also provided for detecting the pushing out or retracting back into position of the locking push rod; The locking push rod is provided with a positioning groove and a positioning protrusion; when the locking push rod is retracted into position, the positioning groove corresponds to the micro switch I; when the locking push rod is pushed out into position, the positioning protrusion corresponds to and abuts against the micro switch I, triggering the micro switch I; there is a transition slope between the positioning groove and the positioning protrusion.

8. A DC charging gun, characterized in that: Including charging gun button, charging gun hook and charging gun electronic lock; The charging gun button is arranged on the charging gun housing so as to be pressable and retractable via a button return spring; the middle portion of the charging gun hook is rotatably arranged on the charging gun housing via a rotating shaft; the charging gun button corresponds to one end of the charging gun hook and can be pressed to drive the charging gun hook to tilt; a snap-fit hook is provided on the other end of the charging gun hook, and the snap-fit hook is located in front of the front end of the charging gun housing; the charging gun electronic lock is based on the DC charging gun electronic lock according to any one of claims 1 to 7; After the locking push rod is pushed out, the locking head of the locking push rod corresponds to the charging gun button and can tighten the pressed charging gun button, so that the charging gun button cannot be pressed.

9. The DC charging gun according to claim 8, characterized in that: The inner end side of the charging gun button is provided with an extended protruding press-lock positioning column; after the locking push rod is pushed out, the locking head of the locking push rod corresponds to the press-lock positioning column of the charging gun button, and can tighten the pressed press-lock positioning column.

10. The DC charging gun according to claim 9, characterized in that: The charging gun electronic lock is arranged in the electronic lock housing; and a locking positioning groove is provided on the electronic lock housing to accommodate the push-lock positioning column; after the locking push rod is pushed out, the locking head extends into the locking positioning groove and can prevent the push-lock positioning column from extending therein.

11. A DC charging gun according to any one of claims 8 to 10, characterized in that: A micro switch II corresponding to the charging gun hook is provided between the rotating shaft and the charging gun button; when the charging gun button is pressed to drive the charging gun hook to tilt, the tilted charging gun hook can trigger the micro switch II.

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