Automobile and charging small door assembly thereof

Abstract

The utility model provides a charging small door assembly which comprises a shell, a cover plate, a transmission mechanism, a lock rod and a reset spring, and when the end portion of a protruding portion is located in a locking sliding groove, the cover plate covers the top of the shell; when the end of the protruding part is located at the starting point end of the locking sliding groove, the third special-shaped tooth abuts against the side wall of the first special-shaped tooth, a gap is formed between the third special-shaped tooth and the second special-shaped tooth, and the lock pin penetrates through the open hole to be inserted into the lock hole. When the end of the protruding part is located at the terminal end of the locking sliding groove, the third special-shaped teeth abut against the second special-shaped teeth, and the lock pin is separated from the lock hole. The utility model further provides an automobile which comprises the charging small door assembly. The door lock has the advantages that production cost is low, the cover plate is locked through a mechanical structure, reliability is high, and an existing door lock actuator locking mode and an existing motor self-locking mode can be replaced.

Description

Technical Field

[0001] The utility model relates to the technical field of automobiles, in particular to an automobile and a charging door assembly thereof. Background Art

[0002] Currently, car charging doors are primarily locked using two methods: a door lock actuator and a motor self-locking mechanism. The former requires specialized locking equipment to be installed on the door housing, resulting in high production costs. The latter utilizes the motor's inherent self-locking function, but this places high demands on the motor and results in poor reliability. Finding a cost-effective and reliable way to open, close, and lock car charging doors is a pressing challenge for those skilled in the art. Utility Model Content

[0003] The purpose of the utility model is to provide a charging door assembly with low production cost and stable operation.

[0004] The utility model provides a charging door assembly, comprising:

[0005] A shell having an open top and an inner cavity formed therein, wherein a side wall of the inner cavity is provided with an opening;

[0006] a cover plate having a lock hole thereon;

[0007] A transmission mechanism is provided in the housing and includes a rotational drive source, a driving gear that rotates under the drive of the rotational drive source, a driven gear transmission-connected to the driving gear, and a driving connecting rod; the driving gear includes a driving ring gear and a protrusion connected to the driving ring gear, a first special-shaped tooth, a second special-shaped tooth, and a plurality of driving teeth are distributed at intervals along the circumference of the driving ring gear, and the first special-shaped tooth and the second special-shaped tooth are adjacent to each other; the driven gear includes a driven ring gear, a third special-shaped tooth and a plurality of driven teeth are distributed at intervals along the circumference of the driven ring gear; a first end of the driving connecting rod is hinged to the bottom of the cover plate, and a second end thereof is connected to the driven gear;

[0008] a lock rod movably disposed on the housing, comprising a lock pin disposed at a first end and a slide portion disposed at a second end, the lock pin being engaged with the opening, the slide portion being provided with a locking slide groove, and an end portion of the protrusion being slidably engaged with the locking slide groove;

[0009] a return spring, disposed between the locking rod and the housing;

[0010] When the end of the protrusion is located in the locking slot, the cover plate covers the top of the housing;

[0011] When the end of the protrusion is located at the starting end of the locking slot, the third special-shaped tooth abuts against the side wall of the first special-shaped tooth and has a gap with the second special-shaped tooth, and the locking pin passes through the opening and is inserted into the locking hole;

[0012] When the end of the protrusion is located at the terminal end of the locking slide groove, the third special-shaped tooth abuts against the second special-shaped tooth, and the locking pin is separated from the locking hole.

[0013] Preferably, the transmission mechanism further comprises a driven connecting rod (32), a first end of the driven connecting rod (32) being hinged to the bottom of the cover plate, and a second end of the driven connecting rod (32) being hinged to the housing.

[0014] Preferably, the locking rod further includes a connecting portion connected to the sliding groove portion, and the return spring is sleeved on the connecting portion.

[0015] Preferably, the cross-sectional areas of the first special-shaped teeth and the second special-shaped teeth are both larger than the cross-sectional area of the active teeth.

[0016] Preferably, the cross-sectional area of the third special-shaped tooth is larger than the cross-sectional area of the driven tooth.

[0017] Preferably, the device further comprises a position sensor arranged near the driven gear, and the driven gear is provided with a rib.

[0018] Preferably, it also includes an emergency pull rope connected to the locking rod.

[0019] Preferably, the driving gear is further connected to an abutting portion, the outer periphery of which has a first abutting surface; the sliding groove portion is further provided with a second abutting surface facing the driving gear and an unlocking sliding groove connected to the locking sliding groove;

[0020] When the end of the protruding portion is located outside the sliding groove portion, the first abutting surface abuts against the second abutting surface, and the locking pin is separated from the opening.

[0021] Preferably, a cover support is further provided at the bottom of the cover, and the lock hole is provided on the cover support.

[0022] The utility model also provides a car, comprising the aforementioned charging small door assembly.

[0023] The benefits of this utility model lie in the fact that, through the coordination of the lock rod, return spring, rotary drive source, and gears, the lock rod simultaneously controls the opening and closing of the cover and achieves both locking and unlocking functions. This assembly offers low production costs and mechanically locks the cover, resulting in high reliability and replacing existing door lock actuator and motor self-locking methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a three-dimensional diagram of the charging door assembly in Example 1;

[0025] Figure 2 This is an exploded view of the charging door assembly in Example 1;

[0026] Figure 3 This is a schematic diagram of the state of the charging door assembly when the cover is open in Example 1;

[0027] Figure 4 This is a schematic diagram of the state of the charging door assembly when the cover is closed in Example 1;

[0028] Figure 5 Schematic diagram of the relative positions of the cover plate in the open and closed states in Example 1;

[0029] Figure 6 1. A side view of the charging door assembly in the locked state and a schematic diagram of the relative positions of the driving gear and the driven gear in Example 1;

[0030] Figure 7 is a schematic diagram of the position of the lock pin relative to the inner cavity of the housing in the locked state in Example 1;

[0031] Figure 8 1. A side view of the charging door assembly in the unlocked critical state and a schematic diagram of the relative positions of the driving gear and the driven gear in Example 1;

[0032] Figure 9 Schematic diagram of the position of the lock pin relative to the inner cavity of the housing in the critical unlocking state in Example 1;

[0033] Figure 10 is a structural diagram of the locking rod in Example 1;

[0034] Figure 11 1. This is a top view of the charging door assembly in the locked state and a cross-sectional view along the AA direction thereof in the first embodiment;

[0035] Figure 12 1. A top view of the charging door assembly in the unlocked critical state and a cross-sectional view thereof in the BB direction in Example 1;

[0036] Figure 13 1. This is a top view of the charging door assembly in the open state and a cross-sectional view along the CC direction thereof in Example 1;

[0037] Figure 14 Schematic diagram of the connection structure between the emergency cable and the locking rod in Example 1;

[0038] Figure 15 is a schematic structural diagram of the locking rod in the second embodiment;

[0039] Figure 16 It is a structural diagram of the driving gear in the second embodiment;

[0040] Figure 17 This is a side view of the charging door assembly in the locked state in the second embodiment;

[0041] Figure 18 This is a side view of the charging door assembly in the unlocked critical state in Example 2;

[0042] Figure 19 This is a side view of the unlocked charging door assembly in Example 2;

[0043] Figure 20 This is a side view of the charging door assembly in the open state in Example 2;

[0044] Component number description:

[0045] 1 Housing

[0046] 11 Shell cavity

[0047] 111 opening

[0048] 12 outer cover

[0049] 2 Cover

[0050] 21 Cover support

[0051] 211 Keyhole

[0052] 31 Active connecting rod

[0053] 32 follower connecting rod

[0054] 4 driven gear

[0055] 41 driven gear

[0056] 42 Third special-shaped tooth

[0057] 43 ribs

[0058] 5 driving gear

[0059] 51 driving gear

[0060] 52 First special-shaped tooth

[0061] 53 Second special-shaped tooth

[0062] 54 protrusion

[0063] 55 abutment

[0064] 551 first contact surface

[0065] 6 Position Sensor

[0066] 7 Rotation drive source

[0067] 8 Emergency cable

[0068] 91 Locking rod

[0069] 911 locking pin

[0070] 912 Connection

[0071] 913 Chute Department

[0072] 913a Locking slide

[0073] 913b Unlock chute

[0074] 9131 Second contact surface

[0075] 92 return spring DETAILED DESCRIPTION

[0076] The following is a further detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings. These embodiments are only used to illustrate the present invention, and are not intended to limit the present invention.

[0077] In the description of this utility model, it should be noted that the terms "upper," "lower," "front," "back," "left," "right," "top," "bottom," "inside," and "outside" and the like, indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific direction, be constructed, or operate in a specific direction. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0078] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0079] In addition, in the description of the present invention, unless otherwise specified, “a plurality of” means two or more.

[0080] Figure 3 The figure shows the state of the charging door assembly when the charging door is open in the first embodiment. In the following description, Figure 3The attached drawings in the figure serve as a reference for the direction. Figure 3 In the figure, the front direction is perpendicular to the viewing paper and facing outward, the back direction is perpendicular to the viewing paper and facing inward, the upward direction is along the viewing paper, the downward direction is along the viewing paper, the right direction is along the viewing paper, and the left direction is along the viewing paper.

[0081] Example 1

[0082] like Figure 1 and Figure 2 As shown, embodiment 1 provides a charging door assembly and a car including the charging door assembly. The charging door assembly includes a housing 1, a cover plate 2, a transmission mechanism, a locking rod 91 and a spring 92.

[0083] The top of the housing 1 is open, and a housing cavity 11 is provided inside. The housing cavity 11 is connected to the top opening and has a charging port inside. An opening 111 is provided on the right side wall of the housing cavity 11.

[0084] like Figure 3 and Figure 6 As shown, a cover support member 21 is provided at the bottom of the cover 2 , and a locking member extending downward is provided on the right side of the cover support member 21 , with a locking hole 211 being provided on the locking member.

[0085] like Figure 2 As shown, the transmission mechanism is arranged in the housing 1, which includes a rotation driving source 7, a driving gear 5 that rotates under the drive of the rotation driving source 7, a driven gear 4 that is transmission-connected to the driving gear 5, a driving connecting rod 31 and a driven connecting rod 32. Figure 6 As shown, the driving gear 5 includes a driving ring gear and a protrusion 54 connected to the driving ring gear, and a first special-shaped tooth 52, a second special-shaped tooth 53 and a plurality of driving teeth 51 are distributed at intervals along the circumference of the driving ring gear. The first special-shaped tooth 52 and the second special-shaped tooth 53 are adjacent to each other, and the cross-sectional areas of the first special-shaped tooth 52 and the second special-shaped tooth 53 are both larger than the cross-sectional area of the driving tooth 51. The driven gear 4 includes a driven ring gear, and a third special-shaped tooth 42 and a plurality of driven teeth 41 are distributed at intervals along the circumference of the driven ring gear, and the cross-sectional area of the third special-shaped tooth 42 is larger than the cross-sectional area of the driven teeth 41. Specifically, the cross-sections of the driving teeth 51 and the driven teeth 41 are both conical, and the cross-sections of the first special-shaped tooth 52, the second special-shaped tooth 53 and the third special-shaped tooth 42 are all rectangular. As shown Figure 3-5 As shown, the upper end (i.e., first end) of the active connecting rod 31 is hinged to the bottom left side of the cover plate 2, and the lower end (i.e., second end) thereof is connected to the driven gear 4. The upper end (i.e., first end) of the driven connecting rod 32 is hinged to the bottom right side of the cover plate 2, and the lower end (i.e., second end) thereof is hinged to the housing 1.

[0086] In the initial state, the cover 2 covers the top opening of the shell 1. When the rotary drive source 7 drives the active gear 5 to rotate clockwise, the driven gear 4 rotates counterclockwise, driving the active connecting rod 31 to rotate counterclockwise around the center axis of the driven gear 4 while driving the driven connecting rod 32 to rotate counterclockwise around its connection axis with the shell 1. The cover 2 rises from the top opening of the shell 1 and moves away from the shell 1, whereby the cover 2 is in the open state. Conversely, when the rotary drive source 7 drives the active gear 5 to rotate counterclockwise, the driven gear 4 rotates clockwise, the cover 2 moves toward the shell 1 and gradually descends, and finally covers the top opening of the shell 1, whereby the cover 2 is in the closed state. The rotary drive source 7 can specifically be a stepper motor or a servo motor, which is connected to the shell 1 through the outer cover 12. The transmission mechanism can keep the cover 2 horizontal (i.e., parallel to the left and right directions) at all times during the opening and closing process, preventing the cover 2 from tilting.

[0087] like Figure 6-10 As shown, the locking rod 91 is movably arranged on the housing 1, and includes a locking pin 911 arranged at the right end (i.e., the first end) of the locking rod 91, a sliding groove portion 913 arranged at the left end (i.e., the second end) of the locking rod 91, and a connecting portion 912 connected to the sliding groove portion 913. Among them, the locking pin 911 cooperates with the opening 111, and the sliding groove portion 913 is provided with a locking sliding groove 913a, and the end of the protrusion 54 slides with the locking sliding groove 913a. The locking sliding groove 913a includes a starting end and an end end, the starting end is located above the end end and relatively far away from the driving gear 5, and the end end is relatively close to the driving gear 5, that is, the distance between the end end and the central axis of the driving gear 5 is smaller than the distance between the starting end and the central axis of the driving gear 5. The reset spring 92 is sleeved on the connecting portion 912 and is arranged between the locking rod 91 and the housing 1.

[0088] like Figure 6-9 As shown, when the end of the protrusion 54 is located in the locking groove 913 a , the cover plate 2 covers the top of the housing 1 .

[0089] like Figure 6 and Figure 7 As shown, when the end of the protrusion 54 is located at the starting end of the locking groove 913a, the third special-shaped tooth 42 abuts against the side wall of the first special-shaped tooth 52 and has a gap with the second special-shaped tooth 53, and the locking pin 911 passes through the opening 111 into the inner cavity 11 of the shell and is inserted into the lock hole 211. The cover plate 2 and the shell 1 are locked, and the charging door assembly is in a locked state.

[0090] like Figure 8 and Figure 9 As shown, when the end of the protrusion 54 is located at the terminal end of the locking groove 913a, the third special-shaped tooth 42 abuts against the second special-shaped tooth 53, the locking pin 911 is separated from the lock hole 211, and the charging door assembly is in a critical unlocking state.

[0091] Combine Figure 6-13 It can be seen that the working principle of the first embodiment is as follows:

[0092] In the initial state, the cover plate 2 covers the top opening of the housing 1, and the end of the protrusion 54 is located at the starting end of the locking groove 913a, and the cover plate 2 and the housing 1 are locked;

[0093] When unlocking is required, the rotary drive source 7 drives the driving gear 5 to rotate clockwise. Since the distance between the terminal end and the central axis of the driving gear 5 is smaller than the distance between the starting end and the central axis of the driving gear 5, and the length of the protrusion 54 remains unchanged, the locking rod 91 continues to move to the right under the driving force of the protrusion 54, compressing the return spring 92; at the same time, the second special-shaped tooth 53 gradually approaches the third special-shaped tooth 42, and there is no power transmission between the two, so the driven gear 4 does not rotate and the cover plate 2 does not move; until the end of the protrusion 54 slides to the terminal end of the locking groove 913a, the third special-shaped tooth 42 and the second special-shaped tooth 53 are locked. When the locking pin 911 and the locking hole 211 are in contact with each other, the charging door assembly is in a critical unlocking state; as the driving gear 5 continues to rotate clockwise, the driven gear 4 rotates counterclockwise with the rotation of the driving gear 5, and the cover plate 2 rises from the top opening of the housing 1 and moves away from the housing 1. At the same time, the end of the protrusion 54 slides from the end end of the locking groove 913a to the outside of the groove portion 913, and the pushing force of the protrusion 54 on the locking rod 91 gradually decreases to 0. Under the elastic reset action of the reset spring 92, the locking rod 91 moves to the left, and the locking pin 911 remains stationary after being inserted into the opening 111.

[0094] When locking is required, the rotary drive source 7 drives the active gear 5 to rotate counterclockwise, and the end of the protrusion 54 moves from the outside of the slide groove 913 to the end point of the locking slide groove 913a. During this process, the cover plate 2 moves toward the shell 1 and gradually descends. At the same time, the protrusion 54 pushes the locking rod 91, and the locking rod 91 continues to move to the right, compressing the return spring 92. Until the end of the protrusion 54 reaches the end point of the locking slide groove 913a, the cover plate 2 covers the top opening of the shell 1, and the charging door assembly is in the unlocking critical state; then as the active gear 5 continues to rotate counterclockwise, the second special-shaped tooth 53 gradually moves away from the third special-shaped tooth 42, and the third special-shaped tooth 42 is gradually released. The side wall of the first special-shaped tooth 52 abuts against the third special-shaped tooth 42, the driven gear 4 and the cover plate 2 remain stationary, and the pushing force of the protrusion 54 on the locking rod 91 gradually decreases. Under the elastic reset action of the reset spring 92, the locking rod 91 moves to the left, and the locking pin 911 moves toward the lock hole 211; until the end of the protrusion 54 slides to the starting end of the locking groove 913a, the side wall of the first special-shaped tooth 52 and the third special-shaped tooth 42 are in contact with each other, and no power can be transmitted between the two. The ECU in the rotary drive source 7 controls the rotary drive source 7 to stop working. At this time, the locking pin 911 has been inserted into the lock hole 211, and the charging door assembly is in a locked state.

[0095] like Figure 6 As shown, when the charging door assembly is locked, the tip of one of the driven teeth 41 abuts the top surface of the second special-shaped tooth 53. In this state, if the cover plate 2 is pried for unusual reasons (such as theft), the driven tooth 41 cannot transmit power to the second special-shaped tooth 53, causing the driven gear 4 to become stuck with the driving gear 5, which remains stationary. The locking rod 91 will not move, thus maintaining a stable locked state for the charging door assembly, thus preventing theft.

[0096] Furthermore, the charging door assembly of embodiment 1 also includes a position sensor 6 arranged near the driven gear 4, and a rib 43 is provided on the driven gear 4. The position sensor 6 is specifically a contact sensor. When the end of the protrusion 54 slides to the starting end of the slide groove portion 913, the rib 43 continues to press the button on the position sensor 6, and the position sensor 6 thereby sends a signal to the car's cab instrument panel, and the cover indicator light (or prompt) on the car's cab instrument panel turns off, informing the user that the cover 2 is closed. Conversely, when the rib 43 is separated from the button on the position sensor 6, the cover indicator light (or prompt) on the car's cab instrument panel turns on, informing the user that the cover 2 is open. This arrangement helps prevent the cover 2 from being damaged due to opening during the driving of the car. Those skilled in the art can also choose other position sensors, such as proximity sensors, as needed to achieve the same detection function.

[0097] Furthermore, if Figure 14 As shown, the charging door assembly of embodiment 1 also includes an emergency cable 8 connected to the locking rod 91. When the rotary drive source 7 is damaged or cannot work normally, the emergency cable 8 can be pulled from outside the vehicle to manually drive the locking rod 91 to move to the right, so that the locking pin 911 disengages from the lock hole 211, thereby unlocking the cover plate 2 and charging the car.

[0098] Example 2

[0099] like Figure 15 and Figure 16 As shown, compared to Example 1, Example 2 differs in that the chute portion 913 of the locking rod 91 is further provided with a second abutment surface 9131 facing the driving gear 5, and an unlocking chute 913b communicating with the locking chute 913a. The terminal end of the locking chute 913a is connected to the starting end of the unlocking chute 913b, and the unlocking chute 913b is arc-shaped and has a constant diameter. The driving gear 5 is also connected to an abutment portion 55, and the outer periphery of the abutment portion 55 has a first abutment surface 551. The first abutment surface 551 is a convex surface protruding outward, while the second abutment surface 9131 is a concave surface that matches the shape of the first abutment surface 551.

[0100] The working principle of the second embodiment is as follows:

[0101] like Figure 17 As shown, in the initial state, the cover plate 2 covers the top opening of the housing 1, the end of the protrusion 54 is located at the starting end of the locking groove 913a, and the cover plate 2 and the housing 1 are locked;

[0102] like Figure 18 As shown, when unlocking is required, the rotary drive source 7 drives the driving gear 5 to rotate clockwise. Since the distance between the end end and the center axis of the driving gear 5 is smaller than the distance between the starting end and the center axis of the driving gear 5, and the length of the protrusion 54 remains unchanged, the locking rod 91 continues to move to the right under the pushing force of the protrusion 54, compressing the reset spring 92; at the same time, the second special-shaped tooth 53 gradually approaches the third special-shaped tooth 42, and there is no power transmission between the two, so the driven gear 4 does not rotate and the cover plate 2 does not move; until the end of the protrusion 54 slides to the end end of the locking groove 913a, the third special-shaped tooth 42 abuts against the second special-shaped tooth 53, the locking pin 911 is separated from the lock hole 211 and the opening 111, and the charging door assembly is in the critical state of unlocking.

[0103] like Figure 19 As shown, as the driving gear 5 continues to rotate clockwise, the driven gear 4 rotates counterclockwise along with the rotation of the driving gear 5, and the cover plate 2 rises from the top opening of the housing 1 and moves away from the housing 1, and the charging door assembly is in the open state; at the same time, the end of the protrusion 54 slides into the unlocking slot 913b. Since the unlocking slot 913b is a section of equal diameter, the pushing force of the protrusion 54 on the locking rod 91 remains unchanged, and the locking pin 911 is always located outside the opening 111 and separated from the opening 111;

[0104] like Figure 20 As shown, as the driving gear 5 continues to rotate clockwise, the end of the protrusion 54 moves from the unlocking slot 913b to the outside of the slot portion 913. At this time, the first abutting surface 551 abuts against the second abutting surface 9131, and the abutting portion 55 replaces the protrusion 54 to continue to apply pushing force to the locking rod 91, and the locking pin 911 remains separated from the opening 111.

[0105] Preferably, when the end of the protrusion 54 slides to the end end of the unlocking slot 913b, the first abutting surface 551 abuts against the second abutting surface 9131. This arrangement can ensure continuous compression of the return spring 92 and prevent the return spring 92 from resetting.

[0106] Compared with the first embodiment, the second embodiment can hide the lock pin 911 so that it is always located outside the shell cavity 11 when the charging door assembly is in the open state, thereby improving the aesthetics of the shell cavity 11.

[0107] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and replacements can be made without departing from the technical principles of the present invention. These improvements and replacements should also be regarded as the scope of protection of the present invention.

Claims

1. A charging door assembly, characterized in that: include: A shell having an open top and an inner cavity formed therein, wherein a side wall of the inner cavity is provided with an opening; a cover plate having a lock hole thereon; A transmission mechanism is provided in the housing and includes a rotational drive source, a driving gear that rotates under the drive of the rotational drive source, a driven gear transmission-connected to the driving gear, and a driving connecting rod; the driving gear includes a driving ring gear and a protrusion connected to the driving ring gear, a first special-shaped tooth, a second special-shaped tooth, and a plurality of driving teeth are distributed at intervals along the circumference of the driving ring gear, and the first special-shaped tooth and the second special-shaped tooth are adjacent to each other; the driven gear includes a driven ring gear, a third special-shaped tooth and a plurality of driven teeth are distributed at intervals along the circumference of the driven ring gear; a first end of the driving connecting rod is hinged to the bottom of the cover plate, and a second end thereof is connected to the driven gear; a lock rod movably disposed on the housing, comprising a lock pin disposed at a first end and a slide portion disposed at a second end, the lock pin being engaged with the opening, the slide portion being provided with a locking slide groove, and an end portion of the protrusion being slidably engaged with the locking slide groove; a return spring, disposed between the locking rod and the housing; When the end of the protrusion is located in the locking slot, the cover plate covers the top of the housing; When the end of the protrusion is located at the starting end of the locking slot, the third special-shaped tooth abuts against the side wall of the first special-shaped tooth and has a gap with the second special-shaped tooth, and the locking pin passes through the opening and is inserted into the locking hole; When the end of the protrusion is located at the terminal end of the locking slide groove, the third special-shaped tooth abuts against the second special-shaped tooth, and the locking pin is separated from the locking hole.

2. The charging door assembly according to claim 1, characterized in that: The transmission mechanism further comprises a driven connecting rod (32), a first end of the driven connecting rod (32) being hinged to the bottom of the cover plate, and a second end of the driven connecting rod (32) being hinged to the housing.

3. The charging door assembly according to claim 1, characterized in that: The locking rod further includes a connecting portion connected to the sliding groove portion, and the return spring is sleeved on the connecting portion.

4. The charging door assembly according to claim 1, characterized in that: The cross-sectional areas of the first special-shaped tooth and the second special-shaped tooth are both larger than the cross-sectional area of the active tooth.

5. The charging door assembly according to claim 1, characterized in that: The cross-sectional area of the third special-shaped tooth is larger than the cross-sectional area of the driven tooth.

6. The charging door assembly according to claim 1, characterized in that: It also includes a position sensor arranged near the driven gear, and the driven gear is provided with a rib.

7. The charging door assembly according to claim 1, characterized in that: Also included is an emergency pull rope connected to the locking rod.

8. The charging door assembly according to claim 1, characterized in that: The driving gear is further connected to an abutting portion, the outer periphery of which has a first abutting surface; the chute portion is further provided with a second abutting surface facing the driving gear and an unlocking chute connected to the locking chute; When the end of the protruding portion is located outside the sliding groove portion, the first abutting surface abuts against the second abutting surface, and the locking pin is separated from the opening.

9. The charging door assembly according to claim 1, characterized in that: A cover plate support is further provided at the bottom of the cover plate, and the lock hole is opened on the cover plate support.

10. An automobile, characterized in that: It comprises a charging door assembly as described in any one of claims 1-9.

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