Self-sucking tailgate lock assembly

Abstract

This utility model relates to the field of automotive door lock technology, specifically to a self-closing tailgate lock assembly, including a housing, a transmission component and a sector tooth disposed within the housing, a center position switch above the sector tooth, the sector tooth being mounted on the housing by sector tooth rivets, a center position switch stop block and a self-closing pin shaft located around the sector tooth rivets on the side wall of the sector tooth, and a connecting rod. One end of the connecting rod has an arc-shaped groove that engages with the self-closing pin shaft, and the other end is rotatably connected to the self-closing rod via the connecting rod rivets. In this utility model, the arc-shaped groove design of the connecting rod and the self-closing pin shaft, combined with a torsion spring reset mechanism, achieves efficient engagement and automatic reset of the self-closing rod and ratchet, improving the continuity and stability of the self-closing action and simplifying the structure. Unlocking can be achieved by manually rotating the emergency unlocking linkage. During the self-closing process, the emergency unlocking linkage can also disengage from the self-closing state through contact between the arc surface and the flange, improving the response speed and safety of emergency operations.

Description

Technical Field

[0001] This utility model relates to the field of automotive door lock technology, specifically to a self-closing tailgate lock assembly. Background Technology

[0002] With the increasing intelligence of automobiles, the functional requirements of tailgate lock assemblies are becoming increasingly complex, especially the reliability of the self-closing function and the convenience of emergency operation, which have become technical challenges. In existing technologies, tailgate lock assemblies mostly use a structure combining motor drive and mechanical transmission to achieve the self-closing function, but they generally suffer from the following problems:

[0003] Self-priming transmission structures are complex, often employing multi-stage connecting rods and gear meshing, resulting in a less streamlined design that increases manufacturing costs and makes maintenance difficult.

[0004] Emergency unlocking is inconvenient; manual emergency unlocking requires specialized tools or complex procedures, making rapid response difficult in emergencies. Furthermore, in existing technologies, door locks cannot self-lock during the self-priming process, posing a safety hazard. Therefore, those skilled in the art have provided a self-priming tailgate lock assembly to address the problems mentioned in the background. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a self-closing tailgate lock assembly, comprising:

[0006] The housing, and the transmission components disposed within the housing;

[0007] Sector teeth; the sector teeth mesh with the transmission components and are connected to the housing by sector tooth rivets; the sidewalls of the sector teeth are provided with a center position switch block and a self-priming pin.

[0008] Connecting rod; one end of the connecting rod engages with the self-priming pin shaft through an arc-shaped groove, and the other end is connected to the self-priming rod through a connecting rod rivet, wherein the end of the self-priming rod is provided with a self-priming rod rivet;

[0009] Unlocking link; the unlocking link is fitted onto the sector tooth rivet and can rotate around it as an axis;

[0010] Emergency unlocking linkage; it is inserted into the unlocking linkage and can be manually adjusted to drive the unlocking linkage to complete the unlocking or self-priming process of disengagement;

[0011] When the self-priming mechanism disengages, the arc surface at the bottom of the unlocking linkage acts on the plastic-coated flange on the side wall of the connecting rod, thereby causing the connecting rod to separate from the self-priming pin.

[0012] It also includes a lock body assembly, an unlocking linkage, and a self-closing lever that work together with the lock body assembly to open and close the lock body assembly.

[0013] Preferably, the transmission assembly includes a motor, a worm gear connected to the motor output shaft, and a turbine gear meshing with the worm gear, the turbine gear meshing with sector teeth.

[0014] Preferably, the connecting rod and the connecting rod rivet, as well as the self-closing rod and the connecting rod rivet, and the self-closing rod rivet are all rotatably connected, and a torsion spring is provided at the connecting rod rivet and the self-closing rod rivet.

[0015] Preferably, the bottom of the unlocking connection is provided with a push block, and a slot is opened on one side of its bottom.

[0016] Preferably, the emergency unlocking linkage is located on the outside of the housing and can rotate with the housing. The emergency unlocking linkage is provided with a plug inside the housing. The plug is cylindrical and is placed in a slot.

[0017] Preferably, the lock body assembly includes a pawl and a ratchet. Both the pawl and the ratchet are rotatably connected to the housing by mounting rivets. A snow lever is mounted on the pawl, and a stop is provided at one end near the unlocking link. A pawl switch is provided inside the housing at the snow lever, and a spring is provided at the end of the pawl switch. One end of the ratchet is a locking tongue, and the other end is a locking block that mates with the arc-shaped groove on the side of the pawl. Two arc-shaped strip protrusions are also provided on the side wall of the ratchet. A ratchet switch is installed inside the housing at the ratchet.

[0018] Preferably:

[0019] During the tailgate unlocking process: the pawl is pushed by the unlocking linkage to rotate counterclockwise, disengaging from the ratchet; the snow lever rotates under the push of the return spring to lock the pawl, preventing the pawl from locking again.

[0020] During the tailgate opening process: the ratchet rotates counterclockwise under the action of the latch, and the rotation of the ratchet will push the snow load bar to rotate clockwise;

[0021] When the tailgate is fully open: the ratchet rotates counterclockwise to reach the fully open position by the action of the latch and the ratchet spring, and pushes open the snow load bar. The snow load bar no longer holds the pawl, and the pawl rotates clockwise to reset by the rebound force of the spring.

[0022] During the tailgate locking process: the ratchet rotates to lock and no longer contacts the snow load bar, and the snow load bar returns to its original position under the action of the spring.

[0023] The technical effects and advantages of this utility model are as follows:

[0024] In this utility model, the arc-shaped groove design of the connecting rod and the self-priming pin, combined with the torsion spring reset mechanism, realizes the efficient engagement and automatic reset of the self-priming rod and the ratchet, improves the continuity and stability of the self-priming action, and simplifies the structure.

[0025] In this invention, the flange of the connecting rod is made of plastic coating, which reduces movement noise, enhances wear resistance, and extends service life.

[0026] In this invention, the emergency unlocking link and the unlocking link are connected by a plug-in structure. The unlocking link can be unlocked by manual rotation. At the same time, during the self-priming process, the emergency unlocking link can also disengage from the self-priming state through the contact between the arc surface and the flange, thereby improving the response speed and safety of emergency operations. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of a self-closing tailgate lock assembly provided in an embodiment of this application;

[0028] Figure 2 This is a partial structural schematic diagram of a self-closing tailgate lock assembly provided in an embodiment of this application;

[0029] Figure 3 This is a structural schematic diagram of the self-priming trigger position in a self-priming tailgate lock assembly provided in an embodiment of this application;

[0030] Figure 4 This is a schematic diagram of the structure of a self-closing tailgate lock assembly in the self-closing to fully locked position provided in an embodiment of this application;

[0031] Figure 5 This is a schematic diagram of the structure of a self-closing tailgate lock assembly when the self-closing rod and ratchet begin to engage, according to an embodiment of this application.

[0032] Figure 6 This is a structural schematic diagram of the self-priming process in a self-priming tailgate lock assembly provided in an embodiment of this application;

[0033] Figure 7 This is a schematic diagram of the self-closing rod engaging in a self-closing tailgate lock assembly according to an embodiment of this application;

[0034] Figure 8 This is a schematic diagram of the self-closing state of a self-closing tailgate lock assembly provided in an embodiment of this application;

[0035] Figure 9 This application provides a self-closing tailgate lock assembly. Figure 8 Schematic diagram of the structure at point A;

[0036] Figure 10 This is a schematic diagram of the structure of a self-closing tailgate lock assembly provided in this application embodiment, showing the ratchet pushing open the snow bar when the tailgate is initially opened;

[0037] Figure 11 This is a structural diagram of the position of the snow lever when the pawl is pushed open during unlocking in a self-closing tailgate lock assembly provided in this application embodiment;

[0038] Figure 12 This is a schematic diagram of the position of the snow lever in the ratchet fully open state in a self-closing tailgate lock assembly provided in an embodiment of this application;

[0039] Figure 13 This is a structural schematic diagram of the snow lever position in the ratchet fully locked state of a self-closing tailgate lock assembly provided in an embodiment of this application.

[0040] In the picture:

[0041] 1. Motor; 2. Worm gear; 3. Turbine; 4. Neutral position switch; 5. Sector gear; 6. Sector gear rivet; 7. Unlocking linkage; 8. Neutral position switch stop; 9. Pawl; 10. Ratchet; 11. Mounting rivet; 12. Pawl switch; 13. Ratchet switch; 14. Snow load bar; 15. Emergency unlocking linkage; 16. Self-priming pin; 17. Connecting rod; 18. Self-priming rod; 19. Connecting rod rivet; 20. Self-priming rod rivet; 701. Curved surface; 171. Flanged edge. Detailed Implementation

[0042] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical applications of the present invention, and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for a particular purpose. Example

[0043] Please see Figures 1-9 This embodiment provides a self-closing tailgate lock assembly, including a housing, in which structural components are installed. The housing is not shown in this document, but the specific structure can be set according to the specific structural components in actual applications. It also includes a transmission assembly disposed in the housing, which consists of a motor 1, a worm gear 2 and a turbine 3. The output shaft of the motor 1 is connected to the worm gear 2, and the worm gear 2 meshes with the turbine 3. Through mutual cooperation, power transmission is realized, serving as the power source for the automation of the assembly.

[0044] It also includes a sector tooth 5, with a neutral position switch 4 above the sector tooth 5. The sector tooth 5 is mounted on the housing via a sector tooth rivet 6. The sector tooth 5 meshes with the turbine 3 in the transmission assembly. The turbine 3 meshes with the sector tooth 5 and drives it to rotate around the sector tooth rivet 6. A neutral position switch block 8 and a self-priming pin 16 are provided on the side wall of the sector tooth 5 around the sector tooth rivet 6. The neutral position switch block 8 serves as a neutral position signal to determine the assembly status.

[0045] It also includes a connecting rod 17, which is wear-resistant and noise-reducing. One end of the connecting rod 17 is provided with an arc-shaped groove, which cooperates with the self-priming pin 16. The other end is rotatably connected to the self-priming rod 18 through the connecting rod rivet 19. The end of the self-priming rod 18 that cooperates with the connecting rod 17 is provided with an arc-shaped bevel, and the other end is provided with a self-priming rod rivet 20. Through the setting of both, the self-priming rod 18 and the connecting rod 17 can both be rotated.

[0046] It also includes an unlocking link 7 and an emergency unlocking link 15. The unlocking link 7 is sleeved on the sector tooth rivet 6 and can rotate around it. It meshes with the turbine 3. The bottom of the unlocking link 7 is provided with a push block and a slot is opened on one side of its bottom. The emergency unlocking link 15 is installed on the outside of the housing and can rotate with the housing. The emergency unlocking link 15 is provided with a rod inside the housing. The rod is cylindrical and is placed in the slot so that it can push the unlocking link 7 to rotate to achieve emergency unlocking. The bottom side wall of the unlocking link 7 is provided with an arc surface 701. Correspondingly, the side wall of the connecting rod 17 is provided with a flange 171. It adopts a plastic coating process, which is wear-resistant and noise-reducing. This setting can achieve self-priming disengagement.

[0047] It also includes a lock body assembly, which consists of a pawl 9, a ratchet 10, and other structures. Both the pawl 9 and the ratchet 10 are rotatably connected to the housing by mounting rivets 11. A snow load bar 14 is mounted on the pawl 9, and a stop is provided at one end near the unlocking link 7. In addition, a pawl switch 12 is provided inside the housing at the snow load bar 14. The end of the pawl switch 12 is provided with a spring. Correspondingly, one end of the ratchet 10 is a locking tongue, and the other end is a locking block that cooperates with the arc-shaped groove on the side of the pawl 9. Two arc-shaped strip protrusions are also provided on the side wall of the ratchet 10. Similarly, a ratchet switch 13 is installed inside the housing at the ratchet 10.

[0048] Inside the housing, at the location of ratchet 10 and pawl 9, there are buffer blocks for their protection. Each buffer block is placed independently and does not affect each other. They are installed in the housing by direct snap-fit, without the need for bolts.

[0049] Specifically, the door lock assembly of this utility model has three states: fully open, half-locked, and fully locked. The specific state of the assembly is determined by signals from three switches: the center switch 4, the pawl switch 12, and the ratchet switch 13. The system is configured such that when a switch is triggered, the signal is "1," and when the switch is open, the signal is "0."

[0050] (1) The signal of the neutral switch 4 is “0”, the signal of the pawl switch 12 is “1”, and the signal of the ratchet switch 13 is “1”; at this time, the assembly is in the fully open state: the snow load bar 14 contacts the spring of the pawl switch 12, the ratchet switch 13 contacts the protrusion on the ratchet 10, the locking tongue of the ratchet 10 is opened, and the locking block abuts against the arc groove on the side of the pawl 9;

[0051] (2) The signal of the neutral switch 4 is “0”, the signal of the pawl switch 12 is “1”, and the signal of the ratchet switch 13 is “0”. At this time, the assembly is in a half-lock state, and it will self-prime to change the door lock to a fully locked state. After the vehicle receives the signal, the motor 1 in the transmission assembly starts, which drives the worm gear 2 and the turbine 3 to mesh and rotate, thereby causing the sector gear 5 to rotate. After the sector gear 5 rotates, the self-priming pin 16 rotates, which drives the connecting rod 17 to move, and through the action of the connecting rod rivet 19, drives the self-priming rod 18 to move. The self-priming rod 18 will move the latch on the ratchet 10, thereby driving the ratchet 10 to rotate, making it slide with the pawl 9, thereby completing the meshing and completing the full lock operation. At this time, the self-priming rod 18 will be reset under the action of the torsion spring (the torsion spring is set at the connecting rod rivet 19 and the self-priming rod rivet 20 for reset), and at the same time drive the connecting rod 17 to reset. After the reset operation, the neutral switch block 8 and the neutral switch 4 are in contact, making its signal “0”.

[0052] In this utility model, a manual self-priming disengagement function is also provided. When a malfunction occurs during the self-priming process, the emergency unlocking linkage 15 can be manually rotated. After it is rotated, the insertion rod will also rotate. The rotation of the insertion rod will drive the unlocking linkage 7 to move. The arc surface 701 at the bottom of the unlocking linkage 7 will contact the flange 171 on the connecting rod 17, thereby pushing the connecting rod 17 to move and separate it from the self-priming pin 16, thereby realizing the reset of the self-priming rod 18 and achieving the purpose of self-priming disengagement.

[0053] When unlocking, if it is an electric unlock, the motor 1 reverses, which drives the unlocking linkage 7 to rotate via the turbine 3. The push block at the bottom of the unlocking linkage 7 contacts the stop block at the end of the pawl 9, thereby pushing the pawl 9 to move. The pawl 9 is pushed open (the pawl 9 rotates counterclockwise, and it has a spring inside, which is twisted), disengaging from the ratchet 10. The snow lever 14 first engages the pawl 9 under the action of the spring to prevent the pawl 9 from locking again. When the tailgate is opened, the ratchet 10 rotates counterclockwise under the action of the latch. The rotation of the ratchet 10 will push the snow lever 14 to rotate clockwise. The ratchet 10 rotates counterclockwise to reach the fully open position under the action of the latch and the ratchet spring, and pushes the snow lever 14 open. The snow lever 14 no longer engages the pawl 9. The pawl 9 rotates clockwise to reset under the rebound force of the spring. When closing the door, the ratchet 10 rotates to lock and no longer contacts the snow lever 14. The snow lever 14 resets under the action of the spring.

[0054] Similarly, if manual unlocking is required, pushing the emergency unlocking lever 15 will cause the unlocking lever 7 to move in the same way as described above, and will not be repeated here.

[0055] Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of this utility model without creative effort should fall within the protection scope of this utility model. Structures, devices, and operating methods not specifically described and explained in this utility model, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A self-closing tailgate lock assembly, comprising a housing and a transmission component disposed within the housing, characterized in that: Sector tooth (5); The sector tooth (5) meshes with the transmission assembly and is connected to the housing by sector tooth rivets (6). The side wall of the sector tooth (5) is provided with a center position switch block (8) and a self-priming pin (16). Connecting rod (17); One end of the connecting rod (17) is engaged with the self-suction pin (16) through an arc-shaped groove, and the other end is connected to the self-suction rod (18) through the connecting rod rivet (19). The self-suction rod (18) is provided with a self-suction rod rivet (20) at its end. Unlocking link (7); the unlocking link (7) is sleeved on the sector tooth rivet (6) and can rotate around it; Emergency unlocking linkage (15); it is connected to the unlocking linkage (7), and manual adjustment can drive the unlocking linkage (7) to complete the unlocking or self-priming process of disengagement; When the self-priming disengages, the arc surface (701) at the bottom of the unlocking link (7) acts on the plastic-coated flange (171) on the side wall of the connecting rod (17), thereby causing the connecting rod (17) to separate from the self-priming pin (16); It also includes a lock body assembly, an unlocking linkage (7), and a self-closing lever (18) that work together with the lock body assembly to open and close the lock body assembly.

2. The self-closing tailgate lock assembly according to claim 1, characterized in that, The transmission assembly includes a motor (1), a worm gear (2) connected to the output shaft of the motor, and a turbine gear (3) meshing with the worm gear, the turbine gear (3) meshing with sector teeth (5).

3. The self-closing tailgate lock assembly according to claim 1, characterized in that, The connecting rod (17) and the connecting rod rivet (19), as well as the self-closing rod (18) and the connecting rod rivet (19) and the self-closing rod rivet (20), are rotatably connected. A torsion spring is provided at the connecting rod rivet (19) and the self-closing rod rivet (20).

4. A self-closing tailgate lock assembly according to claim 1, characterized in that The bottom of the unlocking link (7) is provided with a push block, and a slot is opened on one side of its bottom.

5. A self-closing tailgate lock assembly according to claim 1, wherein The emergency unlocking link (15) is located on the outside of the housing and can rotate with the housing. The emergency unlocking link (15) is located inside the housing and has a plug rod. The plug rod is cylindrical and is placed in a slot.

6. A self-closing tailgate lock assembly according to claim 1, wherein The lock body assembly includes a pawl (9) and a ratchet (10). Both the pawl (9) and the ratchet (10) are rotatably connected to the housing by mounting rivets (11). A snow load bar (14) is mounted on the pawl (9), and a stop is provided at one end of the pawl (9) near the unlocking link (7). A pawl switch (12) is provided inside the housing at the snow load bar (14). A spring is provided at the end of the pawl switch (12). One end of the ratchet (10) is a locking tongue, and the other end is a locking block that cooperates with the arc groove on the side of the pawl (9). Two arc-shaped strip protrusions are also provided on the side wall of the ratchet (10). A ratchet switch (13) is installed inside the housing at the ratchet (10).

7. A self-closing tailgate lock assembly according to claim 6, characterized in that: During the tailgate unlocking process: the pawl (9) is pushed by the unlocking linkage (7) to rotate counterclockwise, disengaging from the ratchet (10), and the snow load bar (14) rotates under the push of the reset spring to lock the pawl (9) to prevent the pawl (9) from locking again; During the tailgate opening process: the ratchet (10) rotates counterclockwise under the action of the latch, and the rotation of the ratchet (10) will push the snow load bar (14) to rotate clockwise; When the tailgate is fully open: the ratchet (10) rotates counterclockwise to reach the fully open position by the action of the latch and the ratchet spring, and pushes open the snow load bar (14). The snow load bar (14) no longer holds the pawl (9). The pawl (9) rotates clockwise to reset by the rebound force of the spring. During the tailgate locking process: the ratchet (10) rotates to lock and no longer contacts the snow load bar (14), and the snow load bar (14) resets under the action of the spring.

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