Electronic lock emergency unlocking mechanism for charging gun, electronic lock and charging gun

Abstract

The invention discloses an emergency unlocking mechanism of an electronic lock for a charging gun, the electronic lock and the charging gun. The emergency unlocking mechanism comprises a transmission shaft, a rotation driving ring, a lock pin, an axial pressing piece and an axial limiting structure. The transmission shaft is driven by the motor, the driving rotating ring is arranged on the outer side of the transmission shaft in a sleeving mode, the end of the driving rotating ring is provided with a first protruding tooth with a first inclined face, the locking pin is arranged on the outer side of the driving rotating ring in a sleeving mode, and the end of the locking pin is provided with a second protruding tooth with a second inclined face. The axial limiting structure limits the axial movement of the lock pin and maintains the axial pressing state of the axial pressing piece. During normal work, the transmission shaft can drive the rotating driving ring and the lock pin to rotate synchronously; when the transmission shaft is stuck due to the fault of the motor lock, external force acts on the lock pin, and the lock pin can independently rotate around the transmission shaft to achieve unlocking. The charging gun is simple in structure and reliable in unlocking, the unlocking force can be flexibly adjusted, and the safety and usability of the charging gun are improved.

Description

Technical Field

[0001] This invention relates to the field of charging gun technology, and in particular to an emergency unlocking mechanism for an electronic lock used in a charging gun, an electronic lock, and a charging gun. Background Technology

[0002] With the rapid development of the new energy vehicle industry, the popularity of electric vehicles is increasing year by year. As the core equipment for electric vehicle energy replenishment, the safety and reliability of charging guns have become a key focus of the industry. During operation, the charging gun needs to be stably locked to the vehicle's charging interface via an electronic lock to prevent it from falling off due to accidental collisions, vibrations, or other factors during charging, thus ensuring the safety and continuity of the charging process.

[0003] Currently, most mainstream electronic locks for charging guns on the market adopt a motor-driven rotary locking structure. The core principle is that the motor drives the transmission shaft to rotate, which in turn drives the locking components (such as the locking pin) to lock and unlock the charging gun. In existing technology, the transmission shaft and locking pin of electronic locks are usually integrated or use a rigid connection structure to transmit power. This structure can stably achieve locking and unlocking functions when the motor is working normally, but it has significant drawbacks in extreme situations: when the motor burns out due to overheating from prolonged operation, abnormal current, or other reasons, or when the transmission shaft jams due to mechanical jamming or foreign object entry, the transmission shaft cannot rotate normally. At this time, the unlocking function of the electronic lock is completely ineffective, and the charging gun will be forcibly locked to the vehicle's charging port, resulting in a "car lock phenomenon."

[0004] The phenomenon of locking the charging gun on the vehicle can cause a series of problems: From the user's perspective, the inability to unplug the gun after charging is completed affects the user experience and subsequent vehicle use plans; from a safety perspective, in emergency situations (such as vehicle malfunctions, fire hazards, etc.), if the charging gun cannot be quickly disconnected, it may lead to an escalation of safety risks; from the equipment maintenance perspective, forcibly unplugging the gun may cause mechanical damage to the charging gun or the vehicle's charging interface, increasing maintenance costs.

[0005] Therefore, there is an urgent need for an electronic lock emergency unlocking mechanism that can still forcibly unlock the vehicle when the drive shaft cannot rotate, in order to fill the existing technological gap, avoid the phenomenon of the charging gun locking the vehicle, and improve the safety and ease of use of the charging gun. Summary of the Invention

[0006] In view of this, the purpose of this invention is to provide an emergency unlocking mechanism for an electronic lock used in a charging gun, an electronic lock, and a charging gun. When the drive shaft is jammed, axial separation is achieved through inclined plane mechanical conversion, allowing the locking pin to rotate independently to drive unlocking. This enables rapid emergency unlocking of the electronic lock in a faulty state, ensuring the reliable use of the charging gun.

[0007] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: On one hand, this invention discloses an emergency unlocking mechanism for an electronic lock used in a charging gun, comprising: The drive shaft is configured to rotate under the drive of a motor; A drive ring is sleeved on the outside of the drive shaft, and its end is provided with a plurality of circumferentially distributed first protrusions, the first protrusions having a first inclined surface; A locking pin is coaxially sleeved on the outside of the drive ring, and its end is provided with a second protruding tooth that meshes with the first protruding tooth. The second protruding tooth has a second inclined surface corresponding to the first inclined surface. An axial clamping member applies an axial clamping force to the drive ring and locking pin to keep the two inclined surfaces in contact. An axial limiting structure is configured to limit the axial movement of the locking pin and maintain its axial clamping state by cooperating with an axial clamping member. When the drive shaft rotates normally, the drive ring drives the locking pin to rotate synchronously through the inclined surface mating structure. When the drive shaft is jammed, an external force is applied to the locking pin, and the first and second inclined surfaces slide relative to each other to generate an axial separation force. When the axial separation force is greater than the axial clamping force, the locking pin overcomes the clamping force of the axial clamping parts and moves axially to separate the drive ring from the locking pin. After separation, the locking pin rotates independently around the drive shaft to unlock.

[0008] Furthermore, the axial clamping member is sleeved on the drive shaft and disposed in the annular groove of the drive ring. One end of the axial clamping member abuts against the bottom surface of the annular groove, and the other end is limited by an axial limiting structure.

[0009] Furthermore, the axial clamping element is an elastic element or an airbag element.

[0010] Furthermore, the axial limiting structure includes: The first limiting unit is located at the end of the axial clamping member away from the drive ring; The second limiting unit, which is integrally formed with or detachably connected to the end of the drive shaft, is used to limit the axial displacement of the locking pin.

[0011] Furthermore, the inclination angles of the first and second inclined planes are 15°-75°.

[0012] Furthermore, both the first and second convex teeth are trapezoidal teeth, with the tooth tip width being smaller than the tooth root width, which facilitates the normal transmission of torque and enables them to withstand greater torque transmission.

[0013] Furthermore, the locking pin is provided with a mounting groove for accommodating the drive ring.

[0014] Furthermore, the outer periphery of the locking pin is provided with a tool operating section for receiving rotation driven by an external unlocking tool.

[0015] On the other hand, the present invention discloses an electronic lock, including a motor and an emergency unlocking mechanism, wherein the emergency unlocking mechanism adopts the above-mentioned emergency unlocking mechanism for an electronic lock for a charging gun; the output end of the motor is connected to a transmission shaft.

[0016] In another aspect, the present invention discloses a charging gun, including a gun shell, a locking hook assembly and an electronic lock. The locking hook assembly includes a locking hook body, one end of which is provided with a button and the other end is provided with a hook for engaging an external charging interface. The electronic lock is the aforementioned electronic lock.

[0017] Furthermore, the locking pin has a contact portion that abuts against the locking hook assembly.

[0018] Furthermore, the gun casing sidewall is provided with an unlocking hole, which corresponds to the tool operating part on the locking pin, allowing an unlocking tool to pass through and drive the tool operating part, so that the locking pin rotates from the locked position to the unlocked position; When the locking pin is in the locked position, the contact part abuts against the button to lock the latch; When the locking pin rotates to the unlock position, the restriction on the button is released.

[0019] Furthermore, a dust cover is provided on the unlocking hole.

[0020] As described above, the emergency unlocking mechanism for an electronic lock used in a charging gun, the electronic lock, and the charging gun of the present invention have the following beneficial effects: (1) Solving the problem of electronic lock failure and vehicle locking: This invention uses a split design of the drive shaft and the locking pin, combined with the cooperation of the drive ring and the axial clamping part, so that when the drive shaft is stuck, the locking pin can be driven to rotate independently by external force. This effectively solves the problem of charging gun locking caused by electronic lock motor burnout and drive shaft jamming, and ensures that the charging gun can still be unlocked normally in the fault state.

[0021] (2) Balancing normal working reliability and emergency unlocking flexibility: During normal operation, the axial clamping force of the axial clamping component makes the inclined surfaces of the first and second protrusions fit tightly together, and the drive ring and the locking pin are driven synchronously to ensure a stable and reliable locking process; during emergency unlocking, only an external force greater than the clamping force of the axial clamping component needs to be applied to separate the locking pin and the drive ring, which is convenient to operate and does not require complicated tools.

[0022] (3) Simple structure, easy to implement and maintain: The present invention uses a split design of drive shaft, drive ring and locking pin, combined with axial clamping parts and axial limiting structure, without the need to add complex drive parts. The overall structure is compact and the manufacturing cost is low. At the same time, each part adopts a detachable connection method such as snap-fit ​​and sleeve, which is convenient for later maintenance and part replacement.

[0023] (4) Improve the safety and ease of use of the charging gun: The implementation of the emergency unlocking function allows the charging gun to be quickly separated in an emergency, reducing safety risks; and the unlocking operation does not require professional skills, and users can complete it with simple tools, which improves the ease of use of the device.

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is one of the isometric views of the emergency unlocking mechanism in this invention.

[0027] Figure 2 This is the second isometric drawing of the emergency unlocking mechanism in this invention.

[0028] Figure 3 This is one of the schematic diagrams of the emergency unlocking mechanism in this invention.

[0029] Figure 4 yes Figure 3 Sectional view at point AA.

[0030] Figure 5 This is the second schematic diagram of the emergency unlocking mechanism in this invention.

[0031] Figure 6 This is a schematic diagram of the drive ring structure.

[0032] Figure 7 This is a schematic diagram of the locking pin structure.

[0033] Figure 8 This is a schematic diagram of the charging gun.

[0034] The diagram shows the following markings: 1. Drive shaft; 2. First retaining ring; 3. Washer; 4. Locking pin; 401. Mounting groove; 402. Tool operating part; 403. Contact part; 404. Second protruding tooth; 4041. Second inclined surface; 5. Second retaining ring; 6. Spring; 7. Drive ring; 701. Annular groove; 702. First protruding tooth; 7021. First inclined surface; 8. Gun casing; 801. Unlocking hole; 9. Locking hook assembly; 10. Motor. Detailed Implementation

[0035] The technical solution of the present invention will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0036] In the description of this invention, it should be understood that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0037] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0038] This invention provides an emergency unlocking mechanism for an electronic lock used in charging guns. Please refer to [link / reference]. Figures 1 to 7 The system includes a drive shaft 1, a drive ring 7, a locking pin 4, an axial clamping component, and an axial limiting structure. The drive shaft 1 is the power input component, the drive ring 7 is the power transmission intermediary, the locking pin 4 is the locking actuator, the axial clamping component provides axial clamping force, and the axial limiting structure ensures the relative position stability of each component. After assembly, all components form an organic whole, enabling power transmission during normal operation and allowing for emergency unlocking via external force in case of malfunction. The structure of each component is described in detail below.

[0039] Please refer to Figure 4The drive shaft 1 is configured to be driven to rotate by the motor 10 and serves as the power input component of the electronic lock. The drive shaft 1 is a cylindrical rod-shaped structure made of high-strength alloy steel. One end of the drive shaft 1 is connected to the output end of the motor 10 (the output shaft of the motor 10 can be used directly as the drive shaft 1, or another shaft connected to the output shaft of the motor 10 via a key or spline can be used as the drive shaft 1, thereby achieving torque transmission). The other end is provided with an axial limiting structure (such as a locking block) integrally formed with the drive shaft 1 or an annular groove that cooperates with the axial limiting structure. The outer wall of the middle part of the drive shaft 1 is provided with a milled surface, so that the cross-section of the middle part of the drive shaft 1 is a waist-shaped drum structure, which is clearance-fitted with the inner side wall of the drive ring 7, ensuring that the drive ring 7 can slide along the axial direction of the drive shaft 1 while avoiding radial sway that affects the accuracy of power transmission.

[0040] The drive ring 7 is a hollow annular structure, fitted onto the outside of the drive shaft 1, and is made of wear-resistant engineering plastic or alloy steel. Please refer to [reference needed]. Figure 6 The end of the drive ring 7 furthest from the motor 10 has several first protruding teeth 702 evenly distributed circumferentially, with grooves formed between adjacent first protruding teeth 702. Each first protruding tooth 702 has a first inclined surface 7021 on its end face. The angle between the first inclined surface 7021 and the axial direction of the drive ring 7 (i.e., the inclined surface angle) can be adjusted within the range of 15°-75° (the smaller the angle, the greater the separation force, and the greater the external force required for unlocking; the larger the angle, the smaller the separation force, and the easier the unlocking, but slippage is more likely to occur during normal transmission). The drive ring 7 has an annular groove 701 on the side facing the motor 10. The width and depth of the annular groove 701 are adapted to the size of the axial clamping component (such as an elastic element, airbag element, etc.) to accommodate the axial clamping component and radially limit its movement. The inner wall of the drive ring 7 is clearance-fitted with the outer wall of the transmission shaft 1, ensuring that the drive ring 7 can rotate synchronously with the transmission shaft 1 and slide axially along the transmission shaft 1.

[0041] Please refer to Figure 4 , Figure 5 and Figure 7 The locking pin 4 is an irregularly shaped ring structure, sleeved on the outside of the drive ring 7, and is made of high-strength engineering plastic or zinc alloy. A mounting groove 401 is provided in the middle of the side of the locking pin 4 facing the motor 10. The inner diameter of the mounting groove 401 is clearance-fitted with the outer diameter of the drive ring 7 to accommodate the drive ring 7 and radially limit its movement. Several second protruding teeth 404 are evenly distributed circumferentially on the bottom surface of the mounting groove 401. The number and tooth shape of the second protruding teeth 404 are adapted to the first protruding teeth 702 to ensure precise meshing. Each second protruding tooth 404 has a second inclined surface 4041 on its end face. The angle between the second inclined surface 4041 and the axial direction of the locking pin 4 is the same as that of the first inclined surface 7021, but the direction of the inclined surfaces is opposite, to ensure that when the first protruding tooth 702 and the second protruding tooth 404 mesh, the first inclined surface 7021 and the second inclined surface 4041 are in close contact.

[0042] It should be noted that the outer periphery of the locking pin 4 is provided with a tool operating part 402, which is compatible with commonly used unlocking tools (such as unlocking rods) to facilitate the application of external force. The outer periphery of the locking pin 4 is provided with a contact part 403, which is used to abut against the locking hook assembly 9 of the charging gun. The locking and unlocking of the locking hook assembly 9 is achieved by rotating the locking pin 4.

[0043] The axial clamping member applies an axial clamping force to the drive ring 7 and the locking pin 4 to keep the first inclined surface 7021 and the second inclined surface 4041 in contact. The axial clamping member is sleeved on the drive shaft 1 and located in the annular groove 701 of the drive ring 7. One end of the axial clamping member abuts against the bottom surface of the annular groove 701 in the drive ring 7, and the other end abuts against the axial limiting structure. Specifically, the axial clamping member can be an elastic element (such as a spring 6), an airbag element, or other elements that can achieve the axial clamping function, and its length or initial pressure can be selected according to the actual situation.

[0044] Please refer to Figure 4 The axial limiting structure is configured to limit the axial movement stroke of the locking pin 4 and maintain its axial pressing state by cooperating with the axial pressing member. The axial limiting structure includes a first limiting unit and a second limiting unit, which are used to limit the axial movement range of the drive ring 7 and the locking pin 4, while maintaining the axial pressing state of the axial pressing member. As one embodiment of the present invention, the first limiting unit may be a retaining ring (such as the first retaining ring 2) detachably connected to the drive shaft 1, or it may be an annular block integrally formed with the drive shaft 1, located at the end of the axial pressing member away from the drive ring 7, for limiting the axial displacement of the axial pressing member; the second limiting unit may be a retaining ring (such as the second retaining ring 5) or a block detachably connected to the end of the drive shaft 1, for limiting the maximum axial movement distance of the locking pin 4 and preventing the locking pin 4 from falling off the drive shaft 1. However, for ease of assembly, it is preferable that at least one limiting unit is detachably connected to the drive shaft 1. As another embodiment of the present invention, the first limiting unit can also be a limiting ring disposed at the end face of the locking pin. The limiting ring can axially press the axial clamping member, and the setting of the limiting ring will not interfere with the rotation of the transmission shaft 1. The shim 3 is an optional annular thin sheet structure, and its use can be determined according to the outer diameter adaptation requirements of the first limiting unit (such as a snap ring or limiting ring). If used, the clamping force of the axial clamping member can be adjusted by replacing the shim 3 with different thicknesses; if not used, the clamping force can be adjusted by adjusting the axial position of the first limiting unit and / or the second limiting unit. Of course, the first limiting unit and the second limiting unit can also take other forms, as long as the corresponding function can be achieved.

[0045] During normal operation, the drive shaft 1 drives the drive ring 7 to rotate. The drive ring 7 drives the locking pin 4 to rotate synchronously through the meshing of the first convex tooth 702 and the second convex tooth 404, thereby locking the electronic lock. When the drive shaft 1 is jammed due to a malfunction, an external force F acts on the locking pin 4. The first inclined surface 7021 and the second inclined surface 4041 slide relative to each other, generating an axial separation force. When the separation force is greater than the axial clamping force of the axial clamping member, the locking pin 4 overcomes the elastic force of the axial clamping member and moves axially and separates from the drive ring 7. The locking pin 4 can rotate independently around the drive shaft 1 to achieve emergency unlocking.

[0046] The assembly process of the emergency unlocking mechanism is described below, taking the axial limiting structure using a detachable first limiting unit (such as the first retaining ring 2 and the washer 3) and a detachable second limiting unit (such as the second retaining ring 5) as an example: (1) Install the first snap ring 2: snap the first snap ring 2 into the pre-set annular groove in the middle of the drive shaft 1 as a reference component for axial positioning, and restrict the axial displacement of the subsequent assembled components toward the end of the drive shaft 1 closer to the motor 10. (2) Installing shim 3: Install shim 3 coaxially on the drive shaft 1 so that one side of shim 3 is tightly fitted with the first snap ring 2. The thickness of shim 3 can be selected according to the axial clamping force requirement of the axial clamping component (spring 6). By adjusting the thickness of shim 3, a basis is provided for the control of the compression amount of spring 6 in the future. (3) Install spring 6: Install spring 6 coaxially on the outside of drive shaft 1. One end of spring 6 is in contact with the side of washer 3 away from the first snap ring 2. At this time, spring 6 is in a naturally extended state, which reserves compression space for subsequent cooperation with drive ring 7. (4) Install the drive ring 7: Coaxially sleeve the drive ring 7 on the outside of the drive shaft 1, so that the annular groove 701 in the drive ring 7 accommodates the spring 6, and the bottom surface of the annular groove 701 is in close contact with the end of the spring 6; at this time, the outer end of the drive ring 7 (with the first protruding tooth 702 and the first inclined surface 7021) faces the end of the drive shaft 1 (the side where the locking pin 4 is to be installed). (5) Install the locking pin 4: Coaxially sleeve the locking pin 4 on the outside of the drive ring 7 so that the second protrusion 404 on the locking pin 4 precisely meshes with the first protrusion 702 of the drive ring 7; the mounting groove 401 of the locking pin 4 must accommodate the drive ring 7 to ensure accurate radial positioning of the two. (6) Install the second snap ring 5: Snap the second snap ring 5 into the annular groove at the end of the drive shaft 1, with one side abutting against the end face of the locking pin 4 away from the drive ring 7; through the cooperation of the first snap ring 2 and the second snap ring 5, each component is axially limited: the spring 6 is compressed between the two snap rings, generating a continuous axial elastic force, so that the drive ring 7 and the drive shaft 1 form static friction due to the elastic force (ensuring synchronous rotation), while keeping the drive ring 7 and the convex toothed inclined surface of the locking pin 4 in contact, completing the overall assembly.

[0047] The above assembly process, through the step-by-step fixing of the axial limiting structure and the axial clamping control of the axial clamping component, not only ensures the reliability of synchronous rotation between the drive ring 7 and the transmission shaft 1 in the case of keyless connection, but also reserves axial movement space for the separation of the locking pin 4 and the drive ring 7 during emergency unlocking, ensuring that the mechanism can achieve the dual functions of normal transmission and emergency unlocking after assembly.

[0048] On the other hand, the present invention discloses an electronic lock, including a motor 10 and an emergency unlocking mechanism. The emergency unlocking mechanism adopts the above-mentioned electronic lock emergency unlocking mechanism. The driving end of the motor 10 is connected to the end of the transmission shaft 1 near the axial clamping member, and is used to drive the transmission shaft 1 to rotate.

[0049] Furthermore, this invention discloses a charging gun, please refer to... Figure 8 It includes the gun casing 8, the lock hook assembly 9, and the aforementioned electronic lock.

[0050] The locking hook assembly 9 includes a locking hook body, with a button at one end and a latch at the other. The latch engages with a groove in the vehicle's socket to achieve mechanical locking, while the button is pressed to lift the latch and release the lock. The locking hook body is a metal rod-shaped structure, with the button located near the handheld end and the latch at the front end. They are connected by a lever structure—pressing the button lifts the latch upwards; releasing it causes the latch to fall back under the action of a return spring. The specific structure of the locking hook assembly 9 is prior art, and the structure described in patent CN222883926U can be adopted.

[0051] It should be noted that the side wall of the gun casing 8 is provided with an unlocking hole 801, which corresponds to the tool operating part 402 on the locking pin 4, allowing the unlocking tool to pass through and drive the tool operating part 402, so that the locking pin 4 rotates from the locked position to the unlocked position: when the locking pin 4 is in the locked position, the contact part 403 is located below the button and prevents the button from moving down, so that the hook remains in the locked state; when the locking pin 4 rotates to the unlocked position, the contact part 403 moves away from below the button, releasing the obstruction to the button, and the button can be pressed down to drive the hook to lift.

[0052] Specifically, the unlocking tool is an unlocking lever. When performing emergency unlocking, one end of the unlocking lever is located outside the gun case 8 (for easy application of force), and the other end is aligned with the tool operating part 402 of the locking pin 4. When the unlocking lever is driven, the external force is transmitted to the locking pin 4 through the tool operating part 402, causing the locking pin 4 to rotate relative to the drive shaft 1.

[0053] To prevent dust and moisture from entering the unlocking hole 801 and affecting the performance of the mechanism, a dust cover (such as a rubber plug or a flip-top structure) can be added to the unlocking hole 801 of the charging gun housing 8. The dust cover and the unlocking hole 801 are connected by an interference fit or a hinge to ensure sealing performance while facilitating opening.

[0054] The following section uses a detachable first limiting unit (such as the first retaining spring 2 and the washer 3) and a detachable second limiting unit (such as the second retaining spring 5) for the axial limiting structure, and a spring 6 for the axial clamping component as an example to explain in detail the working process of the charging gun.

[0055] (a) Normal working status (1) When the motor 10 drives the transmission shaft 1 to rotate, the axial displacement range of each component on the transmission shaft 1 is limited by the axial limiting structure (first snap ring 2, washer 3 and second snap ring 5) through the washer 3. The spring 6 is compressed between the first snap ring 2 and the drive ring 7, generating a continuous axial thrust. This thrust causes the drive ring 7 to press along the transmission shaft 1 towards the locking pin 4. At the same time, static friction is generated between the drive ring 7 and the transmission shaft 1 due to the axial preload. The static friction is greater than the resistance to the relative rotation of the two. Under the action of friction, the drive ring 7 rotates synchronously with the transmission shaft 1. When the drive ring 7 rotates, the first tooth 702 at its end and the second tooth 404 of the locking pin 4 are tightly fitted through the inclined surface (the elastic force of the spring 6 ensures tight fit). The first tooth 702 transmits torque to the second tooth 404 through the inclined surface contact, driving the locking pin 4 to rotate synchronously. (2) The rotation of the locking pin 4 drives the contact part 403 on its outer periphery to move synchronously. The contact part 403 abuts against the button of the charging gun locking hook assembly 9, so that the hook of the locking hook assembly 9 is in the locked position (the hook engages with the slot of the vehicle charging interface), realizing the locking function of the charging gun. When unlocking is required, the motor 10 reverses, the transmission shaft 1 drives the drive ring 7 to rotate in the opposite direction, thereby driving the locking pin 4 to rotate in the opposite direction. The contact part 403 releases the contact with the button of the locking hook assembly 9, and the hook disengages from the slot under the action of the reset spring 6, realizing unlocking.

[0056] (ii) Emergency unlocking status for motor failure When the drive shaft 1 cannot rotate (is jammed) due to motor burnout or other malfunctions, external force is required to unlock it in an emergency. The specific process is as follows: (1) The user passes through the unlocking hole 801 on the charging gun housing 8 with an unlocking tool (such as an unlocking rod) and cooperates with the tool operation part 402 on the locking pin 4 to apply a rotational external force F to the locking pin 4 (in the same direction as the unlocking direction). (2) Since the drive shaft 1 and the drive ring 7 cannot rotate, the second inclined surface 4041 of the second tooth 404 of the locking pin 4 and the first inclined surface 7021 of the first tooth 702 will slide relative to each other under the action of external torque. According to the principle of inclined plane mechanics, the rotational torque will be decomposed into an axial component force (separation force), and the direction of this component force is opposite to the direction of the elastic force of the spring 6. (3) When the axial separation force is greater than the elastic force of the spring 6, the spring 6 is further compressed, the drive ring 7 moves along the transmission shaft 1 toward the first snap ring 2, and the first tooth 702 and the second tooth 404 gradually disengage. (4) When the drive ring 7 and the locking pin 4 are completely separated, the locking pin 4 is no longer constrained by the drive ring 7 and can rotate freely around the drive shaft 1. At this time, if external force is applied to drive the locking pin 4 to rotate, its contact part 403 will release the contact with the button of the locking hook assembly 9, the hook will be reset, the charging gun will be unlocked and can be pulled out.

[0057] This invention utilizes a normal transmission logic of "axial clamping force → static friction force → synchronous rotation" and an emergency unlocking logic of "external force → inclined plane separation force → component separation → independent rotation." Under the premise of keyless connection, it ensures reliable power transmission during normal operation while enabling quick emergency unlocking in fault conditions. Through an innovative split-structure design, this invention solves the technical problem of existing electronic locks being unable to unlock in emergency situations. Its core lies in the organic unity of normal transmission and emergency unlocking achieved by utilizing the convex toothed inclined plane cooperation between the drive ring 7 and the locking pin 4, along with the clamping action of the axial clamping component. This mechanism is simple in structure, highly reliable, and low in cost, and can be widely applied to various charging gun electronic locks, significantly improving the safety and ease of use of charging equipment.

[0058] The above provides a detailed description of the emergency unlocking mechanism, electronic lock, and charging gun for a charging gun provided by the present invention. Specific examples have been used to illustrate the principles and specific implementation methods of the invention. These embodiments are only used to help understand the method and core ideas of the present invention. It should be noted that any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention by those skilled in the art fall within the protection scope of the present invention.

Claims

1. An emergency unlocking mechanism for an electronic lock used in a charging gun, characterized in that, include: The drive shaft (1) is configured to be driven to rotate by the motor (10); The drive ring (7) is sleeved on the outside of the drive shaft (1), and its end is provided with a plurality of circumferentially distributed first protrusions (702), the first protrusions (702) having a first inclined surface (7021). Locking pin (4) is coaxially sleeved on the outside of the drive ring (7), and its end is provided with a second protruding tooth (404) that meshes with the first protruding tooth (702). The second protruding tooth (404) has a second inclined surface (4041) corresponding to the first inclined surface (7021). An axial clamping member applies an axial clamping force to the drive ring (7) and the locking pin (4) to keep the two inclined surfaces in contact; The axial limiting structure is configured to limit the axial movement stroke of the locking pin (4) and maintain its axial pressing state by cooperating with the axial pressing member; When the drive shaft (1) rotates normally, the drive ring (7) drives the locking pin (4) to rotate synchronously through the inclined surface mating structure; when the drive shaft (1) is jammed, the external force acts on the locking pin (4), and the first inclined surface (7021) and the second inclined surface (4041) slide relative to each other to generate an axial separation force. When the axial separation force is greater than the axial clamping force, the locking pin (4) overcomes the elastic force of the axial clamping part and moves axially to separate the drive ring (7) from the locking pin (4); after separation, the locking pin (4) rotates independently around the drive shaft (1) to unlock.

2. The emergency unlocking mechanism for an electronic lock on a charging gun according to claim 1, characterized in that, The axial clamping member is sleeved on the drive shaft (1) and located in the annular groove (701) of the drive ring (7). One end of the axial clamping member abuts against the bottom surface of the annular groove (701), and the other end is limited by the axial limiting structure.

3. The emergency unlocking mechanism for an electronic lock on a charging gun according to claim 1, characterized in that, The axial clamping element is an elastic element or an airbag element.

4. The emergency unlocking mechanism for an electronic lock on a charging gun according to claim 1, characterized in that, The axial limiting structure includes: The first limiting unit is located at the end of the axial clamping member away from the drive ring (7); The second limiting unit is integrally formed with or detachably connected to the end of the drive shaft (1) and is used to limit the axial displacement of the locking pin (4).

5. The emergency unlocking mechanism for an electronic lock on a charging gun according to claim 1, characterized in that, The inclination angles of the first inclined plane (7021) and the second inclined plane (4041) are 15°-75°.

6. The emergency unlocking mechanism for an electronic lock on a charging gun according to claim 1, characterized in that, Both the first convex tooth (702) and the second convex tooth (404) are trapezoidal teeth, and the width of the tooth tip is smaller than the width of the tooth root.

7. The emergency unlocking mechanism for an electronic lock on a charging gun according to claim 1, characterized in that: The locking pin (4) is provided with a mounting groove (401) for accommodating the drive ring (7).

8. The emergency unlocking mechanism for an electronic lock on a charging gun according to claim 1, characterized in that: The outer periphery of the locking pin (4) is provided with a tool operating part (402) for receiving rotation driven by an external unlocking tool.

9. An electronic lock, comprising a motor (10) and an emergency unlocking mechanism, characterized in that: The emergency unlocking mechanism is an electronic lock emergency unlocking mechanism for charging guns as described in any one of claims 1-8; the output end of the motor (10) is connected to the transmission shaft (1).

10. A charging gun, comprising a gun shell (8), a locking hook assembly (9), and an electronic lock, wherein the locking hook assembly (9) comprises a locking hook body, one end of which is provided with a button, and the other end is provided with a hook for engaging an external charging interface, characterized in that: The electronic lock is the electronic lock as described in claim 9.

11. The charging gun as described in claim 10, characterized in that: The locking pin (4) has a contact portion (403) that abuts against the locking hook assembly (9).

12. The charging gun as described in claim 11, characterized in that: The gun casing (8) has an unlocking hole (801) on its side wall. The unlocking hole (801) corresponds to the tool operating part (402) on the locking pin (4), allowing the unlocking tool to pass through and drive the tool operating part (402) so that the locking pin (4) rotates from the locked position to the unlocked position. When the locking pin (4) is in the locked position, the contact part (403) abuts against the button to lock the latch; When the locking pin (4) rotates to the unlock position, the limit on the button is released.

13. The charging gun as described in claim 12, characterized in that: The unlocking hole (801) is equipped with a dust cover.

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