Car tailgate lock

Abstract

The invention discloses a car tailgate lock, comprising a housing, a large lock tongue, a small lock tongue mechanical drive assembly, wherein the large lock tongue is provided with a lock groove, a semi-lock ratchet groove and a drive groove in sequence in a counterclockwise direction; the small lock tongue is provided with a lock tongue and a linkage arm, wherein the lock tongue is respectively engaged with the stop end of the semi-lock ratchet groove and the stop end of the lock groove; the mechanical drive assembly comprises a transmission gear set, a clutch and a drive arm, wherein the transmission gear set comprises an output gear and a drive gear, wherein the drive arm is meshed with the drive gear, wherein the drive arm is provided with a first drive part and a second drive part, wherein the first drive part is engaged with the linkage arm, and the second drive part is engaged with the drive end of the drive groove. The invention adopts one power to realize both self-priming closing of the tailgate lock and automatic unlocking, and has a more sophisticated structure and lower processing cost.

Description

Technical Field

[0001] The invention relates to an improved invention of a car tailgate lock, in particular to a car tailgate lock with a self-priming function. Background Art

[0002] At present, the tailgate of high-end cars is automatically opened and closed, replacing manual operation, which is more convenient to use. This type of tailgate is driven by a gas spring, see the invention patent with publication number CN112681925A and invention name "Gas Spring for Vehicles, Tailgate and Automobile". The manually opened tailgate uses external force and the gravity of the tailgate to completely press the lock into the lock groove of the lock tongue, so that the lock tongue is in a locked state. When closing, the tailgate vibrates very loudly and the closing sound is loud; the automatically opened and closed tailgate uses a gas spring to pull the tailgate downward until the lock of the tailgate enters the lock groove. At this time, the tailgate is not completely closed and is in a semi-locked state. In this case, the tailgate will not vibrate or make a closing sound due to vibration, but it needs to be equipped with a tailgate lock with a self-priming function, and the self-priming function of the tailgate lock is used to convert the semi-locked state of the lock tongue into a fully locked state.

[0003] The tailgate lock with self-priming function achieves the function of self-priming locking by driving the lock tongue to rotate through a motor. When unlocking, the motor drives the ratchet to swing, and the lock tongue disengages from the ratchet to turn to the unlocked state. At present, this type of tailgate lock with self-priming function needs to be equipped with two motors, one for unlocking and one for self-priming, see the publication number CN20780519U and the invention name "A Self-priming Tailgate Lock Assembly", but the dual-motor control is not only complex in structure, but also has a high cost. Summary of the invention

[0004] In view of the technical problems existing in the background technology, the technical problem solved by the present invention is to provide a car tailgate lock with a simplified structure and lower processing cost.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solution: the car tailgate lock is characterized in that: it includes

[0006] a housing, in which a mounting plate is provided;

[0007] A large lock tongue is rotatably arranged on a mounting plate, and is connected to a return spring 1 for rotating the lock tongue toward an unlocked state. The large lock tongue is provided with a lock groove, a semi-lock ratchet groove and a drive groove in sequence in a counterclockwise direction. The counterclockwise direction of the lock groove and the semi-lock ratchet groove is a stop end, and the counterclockwise direction of the drive groove is a drive end;

[0008] A small lock tongue is rotatably mounted on the mounting plate, the small lock tongue is provided with a lock tongue and a linkage arm, the lock tongue is respectively engaged with the stop end of the semi-locking ratchet groove and the stop end of the lock groove, and the small lock tongue is connected with a return spring 2 for pressing the lock tongue toward the large lock tongue;

[0009] and a mechanical drive assembly, which includes

[0010] The transmission gear set includes an input gear, an output gear and a driving gear, wherein the input gear is connected to the output shaft of the motor.

[0011] The clutch comprises a driving disc, a suction cup and a coil. The driving disc and the suction cup are provided with meshing gear rings on their facing end faces, and a spring is provided between the two. A connecting shaft is provided on the disc surface of the driving disc, and an axial hole matching the connecting shaft is provided on the end surface of the output gear. The suction cup is connected to the driving gear.

[0012] And a driving arm, which is rotatably arranged on the mounting plate, the surface of the driving arm is provided with teeth and meshes with the driving gear, the driving arm is provided with a first driving part and a second driving part, the first driving part faces the linkage arm and the linkage arm is arranged in the clockwise direction of the driving arm, the second driving part is arranged on the end face of the driving arm and is axially arranged relative to the large lock tongue, the second driving part cooperates with the driving end of the driving groove, and the driving arm is also connected with a return spring three and a return spring four for resetting it.

[0013] During self-priming, the driving disc of the clutch is engaged with the suction cup, the motor drives the driving arm to swing counterclockwise, the second driving part of the driving arm acts on the driving end of the large lock tongue, pushes the large lock tongue to rotate counterclockwise, and the small lock tongue slides on the surface of the large lock tongue until the lock tongue enters the lock groove and is pressed against the stop end of the lock groove to achieve full locking; after the driving arm completes the full locking operation, the driving disc of the clutch and the suction cup are separated, and the driving arm swings in the opposite direction and resets under the action of the return spring four. During unlocking, the driving disc of the clutch and the suction cup are engaged, the motor drives the driving arm to swing clockwise, the first driving part of the driving arm drives the small lock tongue to swing clockwise, the small lock tongue is separated from the lock groove, and the large lock tongue rotates clockwise to the unlocking state under the action of the return spring one, and then, the driving disc of the clutch and the suction cup are separated, and the driving arm is reset under the action of the return spring three. The present invention adopts one motor to achieve both self-priming closing of the tailgate lock and automatic unlocking, and has a more sophisticated structure and lower processing cost.

[0014] Preferably, the tailgate lock further comprises a manual unlocking assembly, which comprises a swing arm, which is rotatably arranged on the housing, which is connected to a return spring 5, and a first limiter corresponding to the return spring 5 is arranged on the housing, and the track of the swing arm rotation is arranged perpendicular to the track of the linkage arm swinging, and one end of the swing arm is connected to a pull rope, and the other end cooperates with the linkage arm. In the event of failure of the mechanical drive assembly, manual unlocking is also possible, and multi-path unlocking is more practical.

[0015] Preferably, the automobile tailgate lock further comprises a position sensor and a controller, wherein the position sensor, the clutch and the motor are all electrically connected to the controller, wherein the position sensor comprises a first sensor and a second sensor, wherein the first sensor senses a first signal arm of the large lock tongue, and the second sensor senses a second signal arm of the small lock tongue. The controller learns whether the large lock tongue is in a half-locked, fully locked or unlocked state through the positions of the large lock tongue and the small lock tongue acquired by the position sensor, and finally sends a command to the motor to close or open the tailgate lock.

[0016] Preferably, the housing is provided with a second limiter and a third limiter, the second limiter is used to limit the large lock tongue at the unlocking position, and the third limiter is used to limit the small lock tongue at the half-locking position and the full-locking position. The second limiter and the third limiter limit the rotation angles of the large lock tongue and the small lock tongue respectively, the second limiter makes the large lock tongue stay at the unlocking position, and the third limiter makes the pin lock tongue stay in the full-locking and half-locking states. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a three-dimensional diagram of the present invention after a portion of the housing is removed.

[0018] Figure 2 It is a schematic diagram of the inside of the housing of the present invention.

[0019] Figure 3 For the present invention Figure 2 main view.

[0020] Figure 4 For the present invention Figure 2 Rear view.

[0021] Figure 5 It is a partial cross-sectional view of the present invention.

[0022] Figure 6 Schematic diagram of the clutch of the present invention.

[0023] Figure 7 This is a state diagram of the large lock tongue of the present invention from fully locked to unlocked to half locked. DETAILED DESCRIPTION

[0024] The following describes the details and working principle of the embodiments and examples of the present invention in conjunction with the accompanying drawings. This type of automobile tailgate lock includes a housing 16, a large lock tongue 1, a small lock tongue 9 and a mechanical drive assembly. The housing is provided with a mounting plate 10, which divides the inner cavity of the housing into a first cavity and a second cavity, which is convenient for the installation of components and can separate the transmission components and the lock tongue; the large lock tongue 1 is rotatably arranged on the mounting plate 10, and the large lock tongue is connected to a return spring 1 that rotates it to the unlocked state. The large lock tongue is provided with a lock groove 8, a semi-lock ratchet groove 3 and a drive groove 6 in the counterclockwise direction. The counterclockwise direction of the lock groove and the semi-lock ratchet groove is the stop end 2, and the counterclockwise direction of the drive groove is the drive end 7; the small lock tongue 9 is rotatably mounted on the mounting plate 10 On the small lock tongue, a lock tongue 4 and a linkage arm 5 are provided. The lock tongue is respectively engaged with the stop end of the semi-locked ratchet groove and the stop end of the lock groove. The small lock tongue is connected with a return spring 2 that presses the lock tongue 4 toward the large lock tongue 1. In order to limit the rotation angle of the small lock tongue, a third limiter is provided on the housing. When the stop end 2 of the lock groove is pressed with the lock tongue 4, the limiter end of the small lock tongue is pressed with the third limiter, that is, the elastic force of the return spring 2 causes the small lock tongue to rotate counterclockwise until it is blocked by the third limiter, so that the small lock tongue stays in the semi-locked and fully locked state, and the lock tongue of the small lock tongue can support the stop end of the large lock tongue, so that the large lock tongue is in the fully locked position or the semi-locked position. Similarly, in order to limit the rotation angle of the large lock tongue, a second limiter is provided on the housing. The elastic force of the return spring 1 causes the large lock tongue to rotate clockwise until it is blocked by the second limiter, so that the large lock tongue stays in the unlocking position. The circumferential direction of the large lock tongue is provided with an unlocking position, a half-locking position and a full-locking position in sequence, see attached Figure 7 When the lock groove 8 of the large lock tongue is in the semi-locked position, the stop end of the semi-locked ratchet groove 3 is pressed against the lock tongue 4 of the small lock tongue, and it is in a semi-locked state; the large lock tongue rotates counterclockwise, the lock groove rotates to the full-locked position, the lock tongue enters the lock groove 8, and the stop end 2 of the lock groove is pressed against the lock tongue, and it is in a full-locked state; when the small lock tongue 9 is separated from the large lock tongue 1, the return torsion spring 1 causes the large lock tongue to rotate clockwise, and the lock groove rotates to the unlocking position, and the large lock tongue is in an unlocking state.

[0025] The mechanical drive assembly includes a transmission gear set, a clutch and a drive arm 18. The transmission gear set includes an input gear 22, an output gear 17 and a drive gear 15. The input gear is connected to the output shaft of the motor 21. The input gear 22 to the output gear undergoes three or four stages of reduction, so that the output torque becomes larger and reaches 600-800nm; the clutch includes a drive disk 23, a suction cup 24 and a coil. The facing end surfaces of the drive disk 23 and the suction cup 24 are provided with meshing gear rings 32, and a spring 26 is provided between the drive disk and the suction cup. A connecting shaft 29 is provided on the disk surface of the drive disk, and an axial hole matching the connecting shaft is opened on the end surface of the output gear. The suction cup 35 is connected to the drive gear 26, and the connecting shaft 29 of the drive disk is inserted into the axial hole. When the output gear moves axially, the connecting shaft moves in the shaft hole; the rotation of the output gear 17 drives the driving disc 23 to rotate, and the toothed rings of the driving disc and the suction cup are meshed, so the driving disc drives the suction cup 24 to rotate synchronously, and the suction cup rotates with the driving gear 15; in the figure, the output gear 17 is rotatably arranged on the mounting shaft 25, and the mounting shaft is rotatably arranged on the housing 16, the driving disc 23 is coaxially arranged with the output gear, and the driving disc 24 can move axially relative to the output gear, and a sleeve 27 is provided at the center of the suction cup 24, one end of the sleeve is connected to the central axis 28 of the driving gear, and the other end of the sleeve is connected to the mounting shaft, a coil is wound around the sleeve 27, and the coil is energized to generate magnetic force, which causes the driving disc to overcome the elastic force of the spring and move toward the suction cup, and the two are meshed, and at this time the output gear can drive the driving gear to rotate. The driving arm 18 is rotatably arranged on the mounting plate 10, and the surface of the driving arm is provided with a tooth pattern 19, and meshes with the driving gear 15. The driving arm is provided with a first driving part 11 and a second driving part 12, the first driving part faces the linkage arm 5, and the linkage arm is arranged in the clockwise direction of the driving arm, the second driving part is arranged on the end surface of the driving arm and is arranged axially relative to the large lock tongue, the second driving part cooperates with the driving end 7 of the driving slot 6, and the driving arm is also connected with a return spring 3 and a return spring 4 for resetting it, and the two return springs act on the driving arm in opposite directions, and the elastic forces of the two at the reset point of the driving arm cancel each other out. When the driving gear drives the driving arm to rotate clockwise, the first driving part pushes the linkage arm, so that the lock tongue of the small lock tongue leaves the large lock tongue, and the large lock tongue rotates to the unlocked state under the drive of the return spring 1; when the driving gear drives the driving ratio to rotate counterclockwise, the second driving part pushes the large lock tongue to rotate counterclockwise, so that the large lock tongue rotates to the fully locked state.

[0026] The automobile tailgate lock also includes a manual unlocking assembly, which includes a swing arm 20, which is rotatably arranged on the housing 16, and is connected to a return spring 5. A first limiter corresponding to the return spring 5 is provided on the housing, and the rotation trajectory of the swing arm 20 is vertically arranged to the swing trajectory of the linkage arm 5. The installation of the swing arm will not affect the installation of the mechanical drive assembly, and the structural layout is more reasonable and the disassembly and assembly are more convenient; one end of the swing arm is connected to a pull rope, and the other end cooperates with the linkage arm; adding manual unlocking gives users more choices, especially when the mechanical drive assembly fails, the tailgate can be manually unlocked and opened, that is, the pull rope is pulled to overcome the elastic force of the return spring 5, so that the swing arm rotates in the direction of the linkage arm, and the linkage arm is pushed to make the small lock tongue separate from the large lock tongue, and the large lock tongue rotates to the unlocking state, realizing manual unlocking. After unlocking, the elastic swing arm of the return spring 5 rotates in the opposite direction until the swing arm is pressed with the first limiter, and the swing arm is reset at this time.

[0027] The automobile tailgate lock also includes a position sensor and a controller. The position sensor, the clutch and the motor are all electrically connected to the controller. The position sensor includes a first sensor 13 and a second sensor 14. The first sensor senses the first signal arm 33 of the large lock tongue, and the second sensor senses the second signal arm 34 of the small lock tongue. The controller learns whether the large lock tongue is in a half-locked, fully locked or unlocked state through the positions of the large lock tongue and the small lock tongue collected by the position sensor, and finally sends a command to the motor to close or open the tailgate lock.

[0028] When the tailgate of the car needs to be closed, the tailgate of the car swings downward first, and the lock buckle enters the lock groove. At this time, the large lock tongue is in a semi-locked state, and the stop end of the semi-locked ratchet groove is pressed against the lock tongue. At this time, the first sensor 13 does not detect the first signal arm 33 of the large lock tongue, and the second sensor 14 detects the second signal arm 34 of the small lock tongue. The controller determines that the large lock tongue is in a semi-locked state through the information sent by the first sensor and the second sensor, and the controller sends an instruction to the motor 21 and the clutch, the coil is energized, the drive disk 23 and the suction cup 24 are engaged, and the motor drives the drive arm 18 to swing counterclockwise. The second drive part 12 of the drive arm acts on the drive end 7 of the large lock tongue, pushing the large lock tongue to rotate counterclockwise, and the small lock tongue slides on the surface of the large lock tongue until the lock tongue enters the lock groove 8 and is pressed against the stop end 2 of the lock groove to achieve full locking. At this time, the first sensor detects the first signal arm of the large lock tongue, the motor stops working, the coil is powered off, and the elastic force of the spring 26 makes the drive disk 23 away from the suction cup 24, and the drive arm swings in the opposite direction and resets under the action of the return spring four. When unlocking, the controller sends an unlocking command, the driving plate and suction cup of the clutch engage, the motor drives the driving arm to swing clockwise, the first driving part 11 of the driving arm drives the small lock tongue to swing clockwise, the small lock tongue 9 disengages from the lock slot 8, and the large lock tongue 1 rotates clockwise to the unlocking state under the action of return spring 1. At this time, the second sensor does not detect the second signal arm, the motor stops working, the driving plate and suction cup of the clutch separate, and the driving arm is reset under the action of return spring 3.

Claims

1. A car tailgate lock, characterized in that: It includes a housing, a large lock tongue, a small lock tongue, a mechanical drive component and a manual unlocking component. a housing, wherein a mounting plate is provided; A large lock tongue is rotatably arranged on a mounting plate, and is connected to a return spring 1 for rotating the lock tongue toward an unlocked state. The large lock tongue is provided with a lock groove, a semi-lock ratchet groove and a drive groove in sequence in a counterclockwise direction. The counterclockwise direction of the lock groove and the semi-lock ratchet groove is a stop end, and the counterclockwise direction of the drive groove is a drive end; A small lock tongue is rotatably mounted on the mounting plate, the small lock tongue is provided with a lock tongue and a linkage arm, the lock tongue is respectively engaged with the stop end of the semi-locking ratchet groove and the stop end of the lock groove, and the small lock tongue is connected with a return spring 2 for pressing the lock tongue toward the large lock tongue; A mechanical drive assembly, which includes a transmission gear set, a clutch and a drive arm, The transmission gear set includes an input gear, an output gear and a driving gear, wherein the input gear is connected to the output shaft of the motor. The clutch comprises a driving disc, a suction cup and a coil. The driving disc and the suction cup are provided with meshing gear rings on their facing end faces, and a spring is provided between the two. A connecting shaft is provided on the disc surface of the driving disc, and an axial hole matching the connecting shaft is provided on the end surface of the output gear. The suction cup is connected to the driving gear. and a driving arm, which is rotatably arranged on the mounting plate, the surface of the driving arm is provided with tooth patterns and meshes with the driving gear, the driving arm is provided with a first driving part and a second driving part, the first driving part faces the linkage arm and the linkage arm is arranged in the clockwise direction of the driving arm, the second driving part is arranged on the end surface of the driving arm and is axially arranged relative to the large lock tongue, the second driving part cooperates with the driving end of the driving groove, and the driving arm is also connected with a return spring three and a return spring four for resetting it; A manual unlocking assembly includes a swing arm, which is rotatably arranged on a shell, the swing arm is connected to a return spring five, a first limit piece corresponding to the return spring five is provided on the shell, the rotation trajectory of the swing arm is perpendicular to the swing trajectory of the linkage arm, one end of the swing arm is connected to a pull rope, and the other end cooperates with the linkage arm.

2. The automobile tailgate lock according to claim 1, characterized in that: The automobile tailgate lock also includes a position sensor and a controller. The position sensor, the clutch and the motor are all electrically connected to the controller. The position sensor includes a first sensor and a second sensor. The first sensor senses a first signal arm of a large lock tongue, and the second sensor senses a second signal arm of a small lock tongue.

3. The automobile tailgate lock according to claim 1, characterized in that: The housing is provided with a second limiting member and a third limiting member, wherein the second limiting member is used for limiting the position of the large locking tongue at the unlocking position, and the third limiting member is used for limiting the position of the small locking tongue at the half-locking position and the full-locking position.

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