CN116902091A

CN116902091A - Charging port assembly and emergency unlocking method

Info

Publication number: CN116902091A
Application number: CN202310940511.0A
Authority: CN
Inventors: 林金源; 汤桃峰; 游道亮; 骆旭薇
Original assignee: Jiangling Motors Corp Ltd
Current assignee: Jiangling Motors Corp Ltd
Priority date: 2023-07-28
Filing date: 2023-07-28
Publication date: 2023-10-20

Abstract

The application discloses a charging port assembly, which belongs to the technical field of electric automobiles and comprises a vehicle body exterior trim, a charging socket, a remote control key and an NFC card, wherein a lock plunger is arranged in the vehicle body exterior trim, and a charging port cover is movably connected to the front end of the vehicle body exterior trim; the surface of the lock bolt is provided with a lock hook; the charging port cover comprises a lock catch, a base and a decorative cover; the lock catch comprises a lock catch base and a fixed seat; the key fob includes a key body, keys, and emergency unlocking features. The charging port cover can be opened through a device carried by a driver, the device can be a remote control key or an NFC card, and the mode of opening the charging port cover can be to apply magnetic acting force at a specific position so as to change the locked charging port cover into an openable state; the charge flap unlocked by the magnetic force can be easily restored without spending maintenance costs, and the driver can be taught to complete the opening and restoring operation of the charge flap in a short time through an operation instruction or voice guidance.

Description

Charging port assembly and emergency unlocking method

Technical Field

The application belongs to the technical field of electric automobiles, and particularly relates to a charging port assembly and an emergency unlocking method.

Background

Based on the safety and the whole vehicle attractive aspect, the charging socket is shielded by the charging port cover when not in use, and is prevented from being opened under an unauthorized condition; normally, the charging port cover cannot be opened in the whole vehicle locking state, and the locking motor is in the locking state; after the whole vehicle is unlocked, the locking motor is switched to an unlocking state, and the charging socket can be further exposed by pressing the charging port cover to open the charging port cover; under the condition that the whole car 12V storage battery feeds, the car door cannot be unlocked, the charging port cover locking motor cannot be driven to an unlocking state by power supply, namely, a user cannot normally open the charging port cover, or a charging socket is required to be used by damaging the charging port cover in an anti-mode, and large labor force and maintenance cost are required to be consumed by damaging the charging port cover. The electric automobile is not provided with a mechanical key generally, is provided with a remote control key or is unlocked by NFC, bluetooth and the like; this makes it impossible to open the hood or trunk in the case of a feed, and the opening of the hood in a destructive manner also requires considerable labor and maintenance costs; and the 12V storage battery of some electric vehicles is arranged at a position which is not easy to operate, road rescue resources (storage batteries, power-taking cables and the like) are needed for supplementing electricity to the 12V storage battery, long waiting time is possibly needed for restoring the running function of the feed vehicle, the feed vehicle stopped on the charging parking space can be supplemented with electricity for the vehicle by using an overcharge pile after the charging port is opened, and the vehicle can be supplemented with electricity for the vehicle by using a V2V (vehicle-to-vehicle) function of an adjacent vehicle under the condition of no charging pile. The feed vehicle can provide convenience to the user in certain scenarios by opening the cover without damaging the charge flap.

Reference CN115431833a proposes an emergency energy supplementing system for feeding a low-voltage battery, which uses a direct-current charging interface as an interface for supplementing energy for low-voltage feeding of an electric automobile, so as to realize energy supplementing for various charging devices of the low-voltage battery. However, the locking device of the charging port cover is automatically unlocked when the electric automobile is fed at low voltage, so that a charging interface is undesirably exposed and loss is brought to a user; reference CN115084918A proposes a charging flip assembly, adding an emergency unlocking mechanism, which opens the charging flip when the electric locking device fails in the case that the charging flip is locked, in the prior art, an electric car without a mechanical key is difficult to open a car door, a bonnet or a charging flap by a non-destructive means under the condition of 12V battery feeding, and it takes a long maintenance time and a high maintenance cost to transport the feeding car to a maintenance point through a road rescue car and damage the bonnet or the charging port; the design scheme of automatic unlocking of the feed makes the device of the vehicle possibly be started under the condition of unauthorized, and has the problem of low safety.

Disclosure of Invention

The application aims to provide a charging port assembly, so as to solve the problems that the existing charging port assembly provided in the background art is difficult to open a vehicle door, an engine cover or a charging port cover by a nondestructive means under the condition of 12V battery feeding, and the device of a vehicle can be opened under the condition of unauthorized due to the design scheme of automatic unlocking of the feeding, and the safety is low.

In order to achieve the above purpose, the present application provides the following technical solutions: the charging port assembly comprises a vehicle body exterior trim, a charging socket, a remote control key and an NFC card, wherein a lock plunger is arranged in the vehicle body exterior trim, and a charging port cover is movably connected to the front end of the vehicle body exterior trim;

the surface of the lock bolt is provided with a lock hook;

the charging port cover comprises a lock catch, a base and a decorative cover;

the lock catch comprises a lock catch base and a fixed seat;

the remote control key comprises a key body, keys and emergency unlocking features;

the NFC card includes a card unlock feature and an operating instruction.

By adopting the scheme, the charging port cover is opened nondestructively under the feeding condition of the electric automobile; compared with the prior art, the vehicle window or the charging port cover is damaged violently, so that the maintenance cost is reduced; the recovery function can be assembled nondestructively and simply after the charging port cover is opened; the unlocking device is integrated to the remote control key or the NFC card, so that the unlocking device is convenient for a driver to carry about, and does not need to rely on external rescue for dealing with unexpected feeding conditions; the unlocking device integrates operation instruction instructions to instruct a driver to smoothly complete emergency unlocking and recovery of the charging port cover; the unlocking device has an error-proof or anti-theft function and prevents the charging port cover from being opened unexpectedly; the unlocking mode of the lock catch and the lock plunger is compatible with the prior art, so that the cost is reduced; the lock catch is detachably connected with the base, and the lock catch can be independently replaced after the lock catch is worn or accidentally damaged, so that the maintenance cost is reduced compared with the replacement of the whole charging cover.

As a preferred embodiment, the charging socket is fixed on a charging socket bracket, the charging socket bracket is installed on an electric automobile, and the charging socket and the automobile body exterior trim have fixed relative positions on the electric automobile.

As a preferred embodiment, the surface of the charging flap is provided with a pressing feature, which corresponds to the position of the catch.

As a preferred implementation mode, the surface of base is connected with the rocking arm, the other end of rocking arm is connected with the pivot, the base is through rocking arm around pivot swing, the decorative cover is installed on the base surface, the hasp is connected and can realize the separation with the base assembly, be equipped with the lockhole in the hasp.

As a preferred implementation mode, but hasp base and fixing base integrated into one piece or through other mode connection, the fixing base is equipped with the fixing base hole, be equipped with the recess in the fixing base hole, the cross-section of recess is semicircle shape, the laminating face of hasp base contacts with the base, supports the recess through a plurality of spheroidal cambered surfaces.

As a preferred implementation mode, one side of base is equipped with two spacing pieces, restriction hasp is rotatory relative S3 axis behind the binding face of hasp base and the base contact, install the base guide post on the base, the surface of base guide post is equipped with guide post first hole and guide post second hole, be equipped with a plurality of concave surface through-holes in the first hole of guide post, all can hold a spheroid in the concave surface through-hole, the spheroidal concave surface through-hole can make partial sphere protrusion in the guide post surface, the latus rectum of concave surface through-hole is less than spheroidal diameter, the spheroid whole outside that passes concave surface through-hole to move to the first hole of guide post of concave surface through-hole can be restricted.

As a preferred implementation mode, the diameter of the second inner hole of the guide post is smaller than that of the first inner hole of the guide post, the outer surface of the guide post is in clearance fit with the inner hole of the fixed seat, a plunger is arranged in the base guide post, the plunger is coaxially arranged in the base guide post, the plunger further comprises a plunger head part, a plunger middle part, a plunger guide part and a plunger tail part, the plunger head part is in clearance fit with the second inner hole of the guide post, the plunger guide part is in clearance fit with the first inner hole of the guide post, the plunger middle part is positioned at the middle ends of the plunger head part and the plunger guide part, the diameter of the plunger head part is smaller than that of the plunger middle part, and the diameter of the plunger middle part is smaller than that of the plunger guide part.

As a preferred embodiment, a spring is arranged between the plunger and the decorative cover, the spring limits the plunger to slide towards the decorative cover along the axis direction, the plunger can be magnetically adsorbed, a magnet is placed at the pressing feature, the plunger is attracted by the magnet and compresses the spring to slide towards the decorative cover further along the axis direction under the action of attraction force, a limiting block is arranged on the decorative cover, and the plunger stops sliding when moving to the tail of the plunger to contact the limiting block.

As a preferable implementation mode, the tail part of the plunger is an S pole, the magnet faces to the N pole of the plunger, and a second spring is arranged between the fixing seat and the base guide post.

As a preferred embodiment, the profile of the emergency unlocking feature is coupled to the pressing feature, a magnet is provided inside the emergency unlocking feature, and a magnet is provided inside the card unlocking feature to achieve the same emergency unlocking function as the key fob.

The charging port assembly and the emergency unlocking method comprise the following steps:

s1, in a locking state of an electric automobile, a locking motor is in a locking state, namely a lock plunger position is fixed, the lock plunger limits the position of a charging port cover to be in the locking state, the charging port cover is prevented from being opened accidentally under unauthorized conditions, after the electric automobile is unlocked, the locking motor is switched to an unlocking state, namely the lock plunger can be pressed to generate telescopic rotation, the lock plunger is pressed into a certain stroke by the charging port and then extends outwards under the action of spring force to synchronously rotate, the position of the charging port cover is not limited by the rotated lock plunger, namely the charging port cover can be pressed to open the charging port cover to expose a charging socket, under the condition that the electric automobile is fed by a 12V storage battery, the locking motor in the locking state cannot be switched to the unlocking state, namely the charging port cover cannot be opened through conventional pressing operation, and the charging port cover can be unlocked through an external unlocking device under the condition that the locking motor is in the locking state, so that the charging port cover can be used;

s2, the external unlocking device is a non-universal tool, the external unlocking device can be carried by a driver at any time, the external unlocking device is a remote control key or an NFC card, and a magnet is arranged in a partial area of the remote control key or the NFC card;

s3, the charging port cover is opened by applying magnetic force at a specific position of the charging port cover, namely, the magnetic part of the remote control key or the NFC card is attached to or close to the unlocking position of the charging port cover, and the locking structure of the charging port assembly moves and unlocks under the magnetic force so as to change the locked charging port cover into an openable state;

s3, the charging port cover unlocked through the magnetic force can be easily restored without spending maintenance cost, namely, the charging port cover can be assembled and restored to function through simple operation without tools;

s4, a charging port cover emergency unlocking operation instruction or a schematic diagram is arranged in a vehicle instruction or a remote control key and some areas of the NFC card;

s5, two-dimensional codes are arranged in certain areas of the remote control key and the NFC card, and a driver can further obtain a charging port cover emergency unlocking operation instruction or a schematic diagram through scanning the two-dimensional codes through a smart phone or a tablet computer;

s6, the driver can consult with the dealer, the after-sales service point or the manufacturer through a telephone to perform emergency unlocking operation on the charging port cover;

s7, the driver can be taught to complete opening and recovering operations of the charging port cover in a short time through operation instructions or voice guidance.

Compared with the prior art, the application has the beneficial effects that:

1. the charging cover is opened nondestructively under the feeding condition of the electric automobile; compared with the prior art, the vehicle window or the charging port cover is damaged violently, so that the maintenance cost is reduced;

2. the recovery function can be assembled nondestructively and simply after the charging port cover is opened;

3. the unlocking device is integrated to the remote control key or the NFC card, so that the unlocking device is convenient for a driver to carry about, and does not need to rely on external rescue for dealing with unexpected feeding conditions;

4. the unlocking device integrates operation instruction instructions to instruct a driver to smoothly complete emergency unlocking and recovery of the charging port cover;

5. the unlocking device has an error-proof or anti-theft function and prevents the charging port cover from being opened unexpectedly;

6. the unlocking mode of the lock catch and the lock plunger is compatible with the prior art, so that the cost is reduced;

7. the lock catch is detachably connected with the base, and the lock catch can be independently replaced after the lock catch is worn or accidentally damaged, so that the maintenance cost is reduced compared with the replacement of the whole charging cover.

Drawings

FIG. 1 is a schematic view of a closing structure of a charging port cover of an electric vehicle according to the present application;

FIG. 2 is a schematic view of an opening structure of a charging port cover of an electric vehicle according to the present application;

FIG. 3 is a schematic view of the structure of the charging port cover of the present application;

FIG. 4 is a schematic view of the structure of the latch of the present application in the locked or unlocked state, respectively;

FIG. 5 is a schematic view of the structure of the latch and shackle of the present application;

FIG. 6 is a schematic view of a latch structure of the present application;

FIG. 7 is a schematic view of a partial cross-sectional structure of the charge flap of the present application;

FIG. 8 is a schematic view of a plunger of the present application attracted by a magnet and slid over the plunger;

FIG. 9 is a schematic view of the ball shifting and latch and base separation structure of the present application;

FIG. 10 is a schematic view of a base and latch separation structure according to the present application;

FIG. 11 is a schematic view showing a state structure of the charge flap of the present application after the charge flap is unlocked and opened by a magnet;

FIG. 12 is a schematic view of another embodiment of a charging port cover of the present application;

FIG. 13 is a schematic view of the unlocking device of the present application;

FIG. 14 is a schematic view of the engagement of the unlocking device with the charging flap of the present application;

fig. 15 is a schematic view of the latch of the present application being reassembled to a base structure.

In the figure: 1. exterior finishing of the vehicle body; 11. a charging socket bracket; 12. a charging socket; 13. a lock bolt; 131. a locking hook; 2. a charging port cover; 2a, a pressing feature; 21. locking; 21a, a lock hole; 211. a latch base; 212. a fixing seat; 213. a groove; 214. an inner hole of the fixing seat; 22. a base; 221. a rotating arm; 222. a rotating shaft; 223. a limiting piece; 23. a decorative cover; 231. a limiting block; 3. a base guide post; 31. a guide post first bore; 32. a second bore of the guide post; 33. the outer surface of the guide post; 34. a concave through hole; 4. a sphere; 5. a plunger; 51. a plunger head; 52. the middle part of the plunger; 53. a plunger guide; 54. the tail part of the plunger; 6. a spring; 61. a second spring; 7. a magnet; 8. a remote control key; 81. a key body; 82. a key; 83. an emergency unlocking feature; 9. an NFC card; 91. a card unlocking feature; 92. and (5) operation guidance.

Description of the embodiments

For the understanding of the technical scheme of the application by those skilled in the art, the application is further described in detail with reference to the examples and the accompanying drawings; it should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application;

techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.

In the description of the embodiments of the present application, it should be understood that the terms "upper", "lower", "inner", "outer", "front", "rear", etc. indicate positional relationships based on the positional relationships shown in the drawings, and are merely for convenience of description of the present application and do not require that the present application be constructed in a specific positional relationship, and thus should not be construed as limiting the present application.

In the description of the embodiments of the present application, the terms "mounted" and "connected" are to be interpreted broadly, and may be fixed, removable, or directly connected or indirectly connected through an intermediary; those skilled in the art will understand the specific meaning of the terms above in the present application according to circumstances.

Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature.

As shown in fig. 1 and 2, the charging port assembly comprises a vehicle body exterior trim 1, a charging socket 12, a remote control key 8 and an NFC card 9, wherein the charging socket 12 is fixed on a charging socket bracket 11, the charging socket bracket 11 is arranged on an electric vehicle, the charging socket 12 and the vehicle body exterior trim 1 have fixed relative positions on the electric vehicle, and a charging port cover 2 can move relative to the vehicle body exterior trim 1; the vehicle body exterior trim 1 is provided with a lock bolt 13, and the charging cover 2 is provided with a lock catch 21. When the charging port cover 2 is closed, the lock bolt 13 is in a locking state, and the lock catch 21 is fixed/limited in position by the lock bolt 13, so that the opening of the charging port cover 2 is limited; the charging socket 12 is covered/shielded by the charging flap 2 at this time, i.e., the charging socket 12 is in a non-exposed/unavailable state. Optionally, the charging port cover 2 is provided with a pressing feature 2a, and the pressing feature 2a corresponds to the lock catch 21 in position. When the electric automobile is in the unlocking state, the area, close to the pressing feature 2a, of the charging port cover 2 is pressed, the lock plunger 13 in the locking state is pushed by the lock plunger 21 to retract inwards for a certain stroke, the lock plunger 13 is converted into the unlocking state in the retracting process, the lock plunger 13 further ejects a stroke outwards and rotates an angle in the ejecting process to release the constraint on the lock plunger 21, namely the charging port cover 2 is ejected and opened by being driven by the lock plunger 13. The operation principle of the lock bolt 13 is the prior art and will not be described in detail. In short, the closed charge door 2 can be opened by pressing the area near the pressing feature 2a of the charge door 2 when the electric vehicle is in the unlocked state. The closed charge flap 2 cannot be opened by pressing the area near the pressing feature 2a of the charge flap 2 when the electric automobile is in the locked state, in order to prevent the charge flap 2 from being opened under unauthorized conditions; after the electric automobile is unlocked, the locking motor of the lock plunger 13 is powered to be converted into an unlocking state, and under the condition that the electric automobile is fed by the 12V storage battery, the electric automobile cannot be normally unlocked and the locking motor cannot be powered, so that the charging flap 2 cannot be normally opened, namely, the charging socket 12 is not available due to the feeding of the 12V storage battery, and further, the charging socket 12 is not available through the charging socket 12 to supplement power for the 12V storage battery or other means for recovering the power supply of the electric automobile cannot be implemented.

As shown in fig. 3, 4 and 5, the charging flap 2 includes a latch 21, a base 22 and a decorative cover 23; the base 22 is provided with a rotating arm 221 and a rotating shaft 222, and the rotating shaft 222 is connected with the automobile body exterior trim 1; the base 22 can be swung around the axis of the rotation shaft 222 by the swivel arm 221 to switch the open and closed states of the charging flap 2. The decorative cover 23 is mounted on the base 22; typically, the latch 21 is integrally formed with the base 22 or otherwise attached and secured. In the embodiment, the lock catch 21 is assembled and connected with the base 22, and separation of the two can be achieved. Fig. 4 shows the lock plunger 13 in two states, locked and unlocked, respectively, the lock plunger 13 being provided with a lock hook 131, the lock hook 131 being approximately rectangular in the view; 13a is the locking state of the lock bolt 13, and the included angle between the long side/the parallel axis of the long side of the lock hook 131 and the horizontal reference line is A1; the latch 13 is unlocked by rotating the latch hook 131 by about 90 ° along the direction indicated by K1, and the state of the latch 13 after unlocking is indicated by 13b, where the angle between the parallel axes of the long side and the long side of the latch hook 131 and the horizontal reference line is A2, a2—a1=90°. The lock catch 21 is provided with a lock hole 21a, the lock hole 21a is approximately rectangular in the view angle state of fig. 5, the long side dimension of the lock hole 21a is larger than the long side dimension of the lock hook 131, the short side dimension of the lock hole 21a is larger than the short side dimension of the lock hook 131, and the short side dimension of the lock hole 21a is smaller than the long side dimension of the lock hook 131. When the long side/the axis parallel to the long side of the latch hook 131 is parallel to S1, the latch hook 131 cannot pass through the latch hole 21a, and the latch 13 is in a locked state; when the long side/the axis parallel to the long side of the latch hook 131 is parallel to S2, the latch hook 131 can smoothly pass through the latch hole 21a, and the latch 13 is in the unlocked state. The S1 and S2 are substantially at an angle of 90 °, i.e. the S1 position corresponds to the 13a state of the lock 13 and the S2 position corresponds to the 13b state of the lock 13. The cooperation of the lock 13 and the lock 21 is known in the art, and more specific structure and principle can be referred to in the prior art.

As shown in fig. 6, the latch 21 is provided with a latch base 211 and a fixing base 212; the latch base 211 and the fixing base 212 may be integrally formed, or may be connected by an assembling manner or other connection manners. In some embodiments, the latch base 211 and the fixing base 212 are die-cast of aluminum alloy; in other embodiments, the latch base 211 is made of plastic, the fixing base 212 is made of a material with higher strength than the latch base 211 by injection molding, the fixing base 212 can be made of a metal such as steel, aluminum, copper, etc., and the fixing base 212 is embedded into the latch base 211 during injection molding so as to be fixedly connected with the latch base 211. The inner hole 214 of the fixing seat is internally provided with a groove 213, and the section of the groove 213 is approximately semicircular arc-shaped. The contact surface 211a of the latch base 211 contacts with the base 22, and further abuts against the groove 213 through the arc surfaces of the plurality of spheres, that is, the spheres are partially accommodated in the groove 213, so that the spheres limit the fixed base 212 to move along the S3 axis direction, and further the latch 21 is fixed on the base 22, and the latch 21 cannot be separated from the base 22 along the S3 axis direction.

As shown in fig. 7, 8 and 9, the base 22 is provided with a limiting piece 223, and the limiting piece 223 plays a guiding role in the assembling process of the lock catch 21 and limits the lock catch 21 to rotate relative to the S3 axis after the abutting surface 211a of the lock catch base 211 contacts with the base 22. The base guide post 3 is mounted on the base 22, and the base guide post 3 may be constructed of a metal material; optionally, the base guide post 3 is attached to the base 22 by a process of embedding, riveting, screwing, bonding, or the like. The base guide post 3 is provided with a guide post first inner hole 31 and a guide post second inner hole 32, the guide post first inner hole 31 is provided with a plurality of concave through holes 34, each concave through hole 34 can accommodate one sphere 4, the sphere 4 can enable part of the sphere to protrude out of the outer surface 33 of the guide post at the concave through holes 34, but the diameter of the concave through holes 34 is smaller than that of the sphere 4, namely, the concave through holes 34 can limit the sphere 4 to integrally pass through the concave through holes 34 to move to the outside of the guide post first inner hole 31. Preferably, the diameter of the second bore 32 of the guide post is smaller than the diameter of the first bore 31 of the guide post. The outer surface 33 of the guide post is in clearance fit with the inner hole 214 of the fixed seat, and the lock catch 21 can slide along the axis S3 relative to the guide post 3 of the base under the condition that the fixed seat is not limited by the movement of the ball 4; optionally, applying a lubrication to the exterior surface 33 of the guide post further reduces the sliding resistance of the latch 21 during separation from the base 22. The plunger 5 is accommodated in the base guide post 3, and the plunger 5 is arranged coaxially with the base guide post 3; the plunger head 51 is in clearance fit with the second inner hole 32 of the guide post, and the plunger guide part 53 is in clearance fit with the first inner hole 31 of the guide post, namely, the plunger 5 can translate relative to the guide post 3 of the base along the axis S3 under the guiding/limiting action of the first inner hole 31 of the guide post and the second inner hole 32 of the guide post; optionally, a lubricating medium is applied to the outer surfaces of the plunger head 51 and the plunger guide 53, thereby allowing the plunger 5 to slide along the axis S3 with low resistance against the base guide post 3. The plunger middle 52 is located between the plunger head 51 and the plunger guide 53, preferably the diameter D1 of the plunger head 51 is smaller than the diameter D2 of the plunger middle 52, and the diameter D2 of the plunger middle 52 is smaller than the diameter D3 of the plunger guide 53, i.e. D1 < D2 < D3. The plunger head 51 smoothly transitions with the plunger middle 52.

Fig. 7 shows a state in which the lock catch 21 is coupled with the base 22, the plurality of balls 4 are restrained by the plunger middle 52 and accommodated in the concave through holes 34, the balls 4 are partially protruded from the outer surface 33 of the guide post, the protruded portions of the balls 4 are accommodated in the grooves 213, the spring 6 is provided between the plunger 5 and the decorative cover 23, and the elastic force of the spring 6 restricts the plunger 5 to slide toward the decorative cover 23 in the axial direction; the ball 4 restricts the fixed seat 212 from sliding and separating from the base guide post 3 along the S3 axis direction, so as to fix the lock catch 21 on the base 22, and the lock catch 21 cannot be separated from the base 22 along the S3 axis direction. Preferably, the sphere 4 is a round steel ball. In one embodiment, the diameter D2 of the plunger middle 52 is 4mm, the diameter D4 of the guide post outer surface 33 is 8mm, and the diameter D5 of the ball 4 is 2.8mm; as seen in cross section in connection with fig. 7, the two spheres 4 are arranged symmetrically with respect to the central plane of the plunger middle 52; the projection height h=d2/2+d5-D4/2=0.8 mm of the sphere 4 relative to the guide post outer surface 33. The convex portion of the ball 4 opposite to the outer surface 33 of the guide post is sunk into the groove 213 of the fixed base 212, and the plunger middle 52 of the plunger 5 restricts the ball 4 from retracting into the diameter contour surface of the outer surface 33 of the guide post, at this time, the fixed base 212 cannot slide and separate from the base guide post 3 along the S3 axis direction, i.e., the lock catch 21 is fixed on the base 22.

Fig. 8, 9, and 10 illustrate the process of decoupling the shackle 21 from the base 22. The plunger 5 may be attracted by a magnetic material, optionally the plunger 5 is at least partially composed of iron. At the pressing feature 2a of the decorative cover 23, the magnet 7 is placed, and the plunger 5 is attracted by the magnet 7 and further slides in the axial direction toward the decorative cover 23 by the compression spring 6 under the attraction force, that is, the plunger 5 slides in the direction shown by K2 in fig. 8 by the magnet 7. The decorative cover 23 is provided with a limiting block 231, and the plunger 5 stops sliding when the plunger tail 54 contacts the limiting block 231; at this time, the plunger head 51 is located in the second inner bore 32 of the guide post, the plunger guide 53 is located in the first inner bore 31 of the guide post, the plunger middle 52 no longer limits the retraction movement of the ball 4 after the plunger 5 slides, and the ball 4 is limited by the plunger head 51 after retraction. In connection with fig. 9, in one embodiment, the magnet 7 is placed at the pressing feature 2a of the decorative cover 23, and then the decorative cover 23 or the charging cover 2 is pulled to move in the direction indicated by K3 in fig. 9, the recess 213 of the fixing base 212 presses the ball 4 to move toward the inside of the base guide post 3, the ball 4 moves to a position contacting the plunger head 51 and further being restrained by the plunger head 51, at which time the ball 4 is fully accommodated within the diameter contour of the guide post outer surface 33, i.e., the ball 4 does not protrude relative to the guide post outer surface 33, and the fixing base 212 can slide along the axial center with low resistance relative to the base guide post 3. In an embodiment, the diameter D1 of the plunger head 51 is 2.2mm, the diameter D4 of the guide post outer surface 33 is 8mm, and the diameter D5 of the ball 4 is 2.8mm; when the balls 4 are retracted to be in contact with the plunger head 51, the envelope diameters d6=d1+d5×2=7.8 mm of the plurality of balls 4, and the envelope diameter D6 of the balls 4 is smaller than the diameter D4 of the guide post outer surface 33, that is, the balls 4 are completely accommodated in the diameter profile surface of the guide post outer surface 33. During the movement of the charging port cover 2 in the direction shown by K3 in fig. 9, the lock catch 21 is fixed by the lock bolt 13, and fig. 9 shows that the base guide post 3 slides out of the fixing base inner hole 214 of the fixing base 212, and at the same time, the attaching surface 211a of the lock catch 21 is separated from the base 22. Fig. 10 shows the state in which the charging flap 2 is completely separated from the latch 21, and in combination with fig. 11, the latch 21 is fixed by the latch 13, the latch 21 is held on the fixed side of the body trim 1, the charging flap 2 can be opened and the charging receptacle 12 is exposed; that is, in the case where the electric vehicle cannot be unlocked, the charging flap 2 has an opportunity to be opened without damaging the structure of the vehicle, and further the charging receptacle 12 is made available.

In another embodiment, as shown in fig. 12, the plunger 5 is constructed of magnets. Alternatively, the plunger tail 54 of the plunger 5 may be S-pole and the magnet 7 may be N-pole towards the plunger 5, the magnet 7 may attract the plunger 5 to slide along the axis and close to the magnet 7. After the plunger 5 slides, the plunger middle 52 no longer limits the movement of the ball 4, and the ball 4 approaches and contacts the plunger head 51 under the magnetic attraction of the plunger 5. A second spring 61 is arranged between the fixed seat 212 and the base guide post 3, the second spring 61 is in a compressed state, and optionally one end of the second spring 61 is fixed on the fixed seat 212; when the ball 4 is retracted into the diameter contour surface of the outer surface 33 of the guide post under the attraction of the magnetic force of the plunger 5, the base guide post 3 slides out of the inner hole 214 of the fixed seat 212 under the action of the resilience force of the second spring 61, and the charging cover 2 is further separated from the lock catch 21; the above can partially simplify the unlocking process of the charge flap 2 and reduce the operation force.

As shown in fig. 13, 14, in an embodiment, the key fob 8 is provided with a key 82 and an emergency unlocking feature 83; the profile structure of the emergency release feature 83 is coupled to the structure of the pressing feature 2a on the charging flap 2; in some embodiments, the pressing feature 2a is a circular groove, and the emergency unlocking feature 83 may be a circular protrusion, so that the emergency unlocking feature 83 may be embedded in the pressing feature 2a and coupled with the pressing feature 2 a; in other embodiments, the pressing feature 2a is a hexagonal raised structure and the emergency unlocking feature 83 may be a hexagonal recessed structure slightly larger than the pressing feature 2a in size. In connection with fig. 12, the emergency unlocking feature 83 is internally provided with a magnet 7. Under the condition that the electric automobile is normal in function, the locking or unlocking of the automobile door can be realized through operating the key 82, and the locking or unlocking operation of the locking motor of the lock plunger 13 is synchronously realized. As shown in fig. 14, when the 12V/low voltage battery of the electric vehicle is fed, the charging cover 2 is abutted by the remote key 8, the emergency unlocking feature 83 is aligned and abutted against the pressing feature 2a, and the base 22 and the decorative cover 23 of the charging cover 2 can be separated from the latch 21, at which time the latch 21 is fixed by the lock bolt 13, the latch 21 is held on the fixed side of the body trim 1, and the charging cover 2 can be opened and the charging socket 12 is exposed; that is, in the case where the electric vehicle cannot be unlocked, the charging flap 2 has an opportunity to be opened without damaging the structure of the vehicle, and further the charging receptacle 12 is made available. The NFC card 9 is another unlocking device that may be carried by a driver, the NFC card 9 may be provided with a card unlocking feature 91, and the inside of the card unlocking feature 91 is provided with a magnet 7 to achieve the same emergency unlocking function as the remote key 8, that is, to open the charging cover 2 without damaging the structure of the vehicle when the electric vehicle is fed. Preferably, the proper area of the NFC card is provided with operation instructions 92 for emergency unlocking of the charging flap; the operation instruction 92 may be in the form of operation step text, a guidance graphic, a two-dimensional code, a service telephone, etc. or a combination thereof; the purpose of the operation guide 92 is to instruct/teach the driver to smoothly/quickly complete the opening and restoration operation of the charge flap. Similarly, the back of key fob 8 may also be provided with instructions similar to or functionally identical to instructions 92. Preferably, the unlocking device such as the remote control key 8 or the NFC card 9 has an error/theft prevention function, and is intended to prevent the charging port cover 2 from being unlocked by a general-purpose magnet to some extent; the error/theft protection function may be achieved by a combination of the geometry of the pressing feature 2a, the polarity of the magnet 7, the magnetic force of the magnet 7, etc. It will be appreciated that unlocking is not achieved either if the magnets are in an incorrect position or if the magnets are not of matching polarity or if the magnetic force of the magnets is too small.

As shown in fig. 11 and 15, when the lock bolt 13 is kept in the unlock state, the lock catch 21 is rotated by about 90 ° along the axis of the lock bolt 13, and the lock hook 131 can pass through the lock hole 21a, that is, the lock catch 21 can be removed from the lock bolt 13 and separated. The lock catch 21 is removed to enable the fixing base 212 to be aligned with the base guide post 3 and mounted on the base 22, the remote control key 8 is removed when the fitting surface 211a of the lock catch 21 mounted on the lock catch base 211 contacts with the base 22, the groove 213 is aligned with the concave through hole 34, and the limiting piece 223 limits the phase of the lock catch 21. The plunger 5 moves along the direction shown by K4 under the action of the elastic force of the spring 6, the ball 4 is pressed by the transitional inclined plane between the plunger head 51 and the plunger middle 52 of the plunger 5, and the ball 4 slides into the corresponding concave through hole 34 along the direction shown by K5. With reference to fig. 7, as the plunger 5 moves further to the left, the ball 4 is pushed by the plunger middle 52, the ball 4 partially protrudes from the outer surface 33 of the guide post, the protruding portion of the ball 4 is accommodated in the groove 213, and the ball 4 fixes the fixing base 212 and the base guide post 3, and further fixes the lock catch 21 on the base 22; the lock catch 21 and the base 22 are restored to the coupled state, and the charging port cover 2 is restored.

s1, in a locking state of an electric automobile, a locking motor is in a locking state, namely the position of a lock plunger 13 is fixed, the lock plunger 13 limits the position of a charging port cover 2 to be in the locking state, the charging port cover 2 is prevented from being accidentally opened under the unauthorized condition, after the electric automobile is unlocked, the locking motor is switched to an unlocking state, namely the lock plunger 13 can be pressed to generate telescopic rotation movement, the lock plunger 13 is pressed into a certain stroke by a charging port and then extends outwards under the action of a spring 6 to synchronously rotate, the rotated lock plunger 13 does not limit the position of the charging port cover any more, namely the charging port cover 2 is pressed to open the charging port cover 2 so as to expose a charging socket 12, under the condition that the electric automobile is fed by a 12V storage battery, the locking motor in the locking state cannot be switched to the unlocking state by electric drive, namely the charging port cover 2 cannot be opened by conventional pressing operation, and the charging port cover 2 can be unlocked by an external unlocking device under the locking state of the locking motor, so that the charging port cover 12 can be used by the charging port cover 12;

s2, an external unlocking device is a non-universal tool, the external unlocking device can be carried by a driver at any time, the external unlocking device is a remote control key 8 or an NFC card 9, and a magnet 7 is arranged in a partial area of the remote control key 8 or the NFC card 9;

s3, the charging port cover 2 can be opened by applying magnetic force on a specific position of the charging port cover 2, namely, the magnetic part of the remote control key 8 or the NFC card 9 is attached to or close to the unlocking position of the charging port cover 2, and the locking structure of the charging port assembly moves and unlocks under the magnetic force so as to change the locked charging port cover 2 into an openable state;

s3, the charging port cover 2 unlocked through magnetic force can be easily restored without cost of maintenance, namely, the charging port cover 2 can be assembled and restored to function through simple operation without tools;

s4, a vehicle instruction book or a remote control key 8 and an emergency unlocking operation instruction or a schematic diagram of the charging flap 2 are arranged in certain areas of the NFC card 9;

s5, two-dimensional codes are arranged in certain areas of the remote control key 8 and the NFC card 9, and a driver can further obtain a quick unlocking operation instruction or a schematic diagram of the charging flap 2 by scanning the two-dimensional codes through a smart phone or a tablet computer;

s6, the driver can consult the dealer, the after-sales service point or the manufacturer to perform emergency unlocking operation on the charging port cover 2 through a telephone;

s7, the driver can be taught to complete the opening and restoration operation of the charge flap 2 in a short time by the operation instruction or the voice guidance.

The foregoing description of the preferred embodiments of the present application is provided for the purpose of aiding in the understanding of the method and its core concept, and is not intended to limit the application; it will be apparent to those skilled in the art that various changes and modifications can be made in the present application without departing from the spirit or scope of the application, and it is intended to cover all such modifications, equivalents, or improvements in the embodiments as fall within the true spirit and scope of the application.

Claims

1. Charging port subassembly, its characterized in that: the automobile body external ornament (1), a charging socket (12), a remote control key (8) and an NFC card (9) are included, a lock plunger (13) is arranged in the automobile body external ornament (1), and a charging cover (2) is movably connected to the front end of the automobile body external ornament (1);

the surface of the lock bolt (13) is provided with a lock hook (131);

the charging port cover (2) comprises a lock catch (21), a base (22) and a decorative cover (23);

the lock catch (21) comprises a lock catch base (211) and a fixed seat (212);

the remote control key (8) comprises a key body (81), a key (82) and an emergency unlocking feature (83);

the NFC card (9) comprises a card unlocking feature (91) and operation instructions (92).

2. The charging port assembly of claim 1, wherein: the charging socket (12) is fixed on the charging socket bracket (11), the charging socket bracket (11) is installed on the electric automobile, and the charging socket (12) and the automobile body exterior trim (1) have fixed relative positions on the electric automobile.

3. The charging port assembly of claim 1, wherein: the surface of the charging port cover (2) is provided with a pressing feature (2 a), and the pressing feature (2 a) corresponds to the position of the lock catch (21).

4. The charging port assembly of claim 1, wherein: the surface of base (22) is connected with rocking arm (221), the other end of rocking arm (221) is connected with pivot (222), base (22) are through rocking arm (221) swing around pivot (222), decorating lid (23) are installed in base (22) surface, hasp (21) and base (22) assembly connection and can realize the separation, be equipped with lockhole (21 a) in hasp (21).

5. The charging port assembly of claim 1, wherein: the lock catch base (211) and the fixing base (212) can be integrally formed or connected in other modes, the fixing base (212) is provided with a fixing base inner hole (214), a groove (213) is formed in the fixing base inner hole (214), the cross section of the groove (213) is in a semi-circular arc shape, the joint surface of the lock catch base (211) is in contact with the base (22), and the groove (213) is propped against through the cambered surfaces of the spheres (4).

6. The charging port assembly of claim 1, wherein: one side of base (22) is equipped with two spacing pieces (223), restriction hasp (21) are rotatory relative S3 axis behind the binding face of hasp base (211) and base (22) contact, install base guide post (3) on base (22), the surface of base guide post (3) is equipped with guide post first hole (31) and guide post second hole (32), be equipped with a plurality of concave surface through-hole (34) in guide post first hole (31), all can hold a spheroid (4) in concave surface through-hole (34), the concave surface through-hole (34) of spheroid (4) can make partial sphere protrusion in guide post surface (33), the latus rectum of concave surface through-hole (34) is less than the diameter of spheroid (4), concave surface through-hole (34) can restrict spheroid (4) wholly to pass the outside of concave surface through-hole (34) to guide post first hole (31).

7. The charging port assembly as defined in claim 6, wherein: the diameter of guide post second hole (32) is less than guide post first hole (31), guide post surface (33) and fixing base hole (214) clearance fit, be provided with plunger (5) in base guide post (3), plunger (5) are arranged with the base guide post (3) in the coaxial, plunger (5) still including plunger head (51), plunger middle part (52), plunger guide part (53) and plunger afterbody (54), plunger head (51) and guide post second hole (32) clearance fit, plunger guide part (53) and guide post first hole (31) clearance fit, plunger middle part (52) are located the middle-end of plunger head (51) and plunger guide part (53), the diameter of plunger head (51) is less than plunger middle part (52), the diameter of plunger middle part (52) is less than plunger guide part (53).

8. The charging port assembly as set forth in claim 7, wherein: be equipped with spring (6) between plunger (5) and decorative cover (23), spring (6) restriction plunger (5) are along axle center direction toward decorative cover (23) slip, plunger (5) can be by magnetic adsorption, place magnet (7) in pressing feature (2 a) department, plunger (5) are attracted by magnet (7) and compress spring (6) further along axle center direction toward decorative cover (23) slip under the effect of attraction, be equipped with stopper (231) on decorative cover (23), plunger (5) stop sliding when moving to plunger afterbody (54) contact stopper (231).

9. The charging port assembly as set forth in claim 7, wherein: the tail of the plunger (5) is an S pole, the magnet (7) faces to the N pole of the plunger (5), and a second spring (61) is arranged between the fixing seat (212) and the base guide column (3).

10. The charging port assembly of claim 1, wherein: the appearance of emergent unblock characteristic (83) and press characteristic (2 a) structure intercoupling, emergent unblock characteristic (83) are inside to be equipped with magnet (7), card unblock characteristic (91) are inside to be equipped with magnet (7) in order to realize the emergent unblock function the same with remote control key (8).

11. The charging port assembly and emergency unlocking method according to any one of claims 1 to 10, comprising the following scheme:

s1, in a locking state of an electric automobile, a locking motor is in a locking state, namely the position of a lock plunger (13) is fixed, the lock plunger (13) limits the position of a charging port cover (2) to be in a locking state, the charging port cover (2) is prevented from being accidentally opened under the condition of unauthorized, after the electric automobile is unlocked, the locking motor is switched to an unlocking state, namely the lock plunger (13) can be pressed to generate telescopic rotation, the lock plunger (13) is pressed into a certain stroke by the charging port and then extends outwards under the force of a spring (6) to synchronously rotate, the rotated lock plunger (13) does not limit the position of the charging port cover any more, namely the charging port cover (2) is pressed to open the charging port cover (2) so that a charging socket (12) is exposed, under the condition of feeding of a 12V storage battery of the electric automobile, the locking motor in the locking state cannot be switched to the unlocking state by electric drive, namely the charging port cover (2) cannot be opened by conventional pressing operation, and the charging port cover (2) can be unlocked by an external unlocking device under the condition of the locking motor, so that the charging port cover (12) can be used;

s2, an external unlocking device is a non-universal tool, the external unlocking device can be carried by a driver at any time, the external unlocking device is a remote control key (8) or an NFC card (9), and a magnet (7) is arranged in a part of the area of the remote control key (8) or the NFC card (9);

s3, the charging port cover (2) is opened by applying magnetic force at a specific position of the charging port cover (2), namely, the magnetic part of the remote control key (8) or the NFC card (9) is attached to or close to the unlocking position of the charging port cover (2), and the locking structure of the charging port assembly moves and unlocks under the magnetic force so as to change the locked charging port cover (2) into an openable state;

s3, the charging port cover (2) unlocked through magnetic force can be easily restored without cost of maintenance, namely, the charging port cover (2) can be assembled and restored to function through simple operation without tools;

s4, a vehicle instruction book or a remote control key (8) and an emergency unlocking operation instruction or a schematic diagram of the charging flap (2) are arranged in certain areas of the NFC card (9);

s5, two-dimensional codes are arranged in certain areas of the remote control key (8) and the NFC card (9), and a driver can further obtain a quick unlocking operation instruction or a schematic diagram of the charging flap (2) through scanning the two-dimensional codes through a smart phone or a tablet computer;

s6, the driver can consult with the dealer, the after-sales service point or the manufacturer through a telephone to conduct emergency unlocking operation on the charging port cover (2);

s7, the driver can be taught to complete the opening and recovering operation of the charging port cover (2) of the charging port cover in a short time through an operation instruction or voice guidance.