Tail door lock for electric tail door system

Abstract

The utility model relates to the field of automobile door locks, in particular to a tail door lock for an electric tail door system, which comprises a shell component and a lock body assembly. The lock body assembly comprises a driving assembly; the driving assembly comprises a driving motor, and the driving motor is connected with the lock body assembly through a transmission mechanism. The transmission mechanism comprises a first-stage worm connected with the motor, a first transmission part and a second transmission part; the first transmission part and the second transmission part are arranged in a stacked mode. According to the tail door lock disclosed by the utility model, through the stacking arrangement of the first transmission part and the second transmission part, the transverse size of the tail door lock actuator can be well reduced, so that the requirements on the thicknesses of a tail door and a corresponding back door can be reduced during the subsequent installation of the tail door lock, and the actual arrangement of the tail door lock is facilitated.

Description

Technical Field

[0001] The utility model relates to the field of automobile door locks, in particular to a tailgate lock for an electric tailgate system. Background Art

[0002] The current development of automobile electrification and intelligence is advancing by leaps and bounds. Against this background, more and more car models are beginning to be equipped with self-priming locks.

[0003] The existing self-priming lock requires two motors and two sets of transmission mechanisms to realize the unlocking and locking functions. It has many parts, large size, heavy weight, complex structure, complicated process and high cost.

[0004] In addition, when the self-priming mechanism in the traditional self-priming lock is pushed, a flange plate structure is generally set on the edge of the locking lever, and the subsequent driving component pushes the flange plate to realize the rotation operation of the locking lever; this causes a large contact area between the locking lever and the driving component, generally surface contact or line contact, such as the content disclosed in patent 201821332605.0-Self-priming mechanism of self-priming lock, self-priming lock and vehicle; although this contact method can realize the rotation operation of the locking lever and realize the closed locking of the lock hook; but because the movement trajectory of the locking lever is arc-shaped, in actual use, the driving component and the locking lever will have large contact noise and friction due to the large contact area; this will affect the smoothness of the self-priming lock transmission.

[0005] At the same time, the traditional self-priming lock takes up too much space vertically, and has high space requirements when actually arranged, and it is not convenient to arrange it on the tailgate.

[0006] Therefore, in order to improve or solve at least one of the above problems, it is necessary to optimize the design of the existing self-priming lock. Utility Model Content

[0007] The utility model aims to provide a self-priming mechanism which can reduce the excessive abnormal noise when the locking lever is locked.

[0008] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0009] A tailgate lock for an electric tailgate system comprises a housing component and a lock body assembly; the lock body assembly comprises a drive component;

[0010] The driving assembly includes a driving motor, and the driving motor is connected to the lock body assembly through a transmission mechanism;

[0011] The transmission mechanism includes a primary worm connected to the motor, a first transmission component and a second transmission component;

[0012] The first transmission component and the second transmission component are stacked.

[0013] The lock body assembly includes a drive component, a self-priming mechanism and a lock body component;

[0014] The driving assembly is connected to the lock body assembly via a self-priming mechanism;

[0015] The self-priming mechanism comprises a driving unit and a control unit;

[0016] The driving unit includes a thrust nut; the control unit includes a locking link; the locking link includes a locking lever;

[0017] The lock body assembly includes a lock hook and a pawl arranged in the housing assembly; the pawl cooperates with the lock hook for use;

[0018] The self-priming mechanism also includes an unlocking lever; the unlocking lever is used in conjunction with a ratchet pawl;

[0019] The locking hook is used in conjunction with the locking connecting rod in the self-priming mechanism;

[0020] The thrust nut in the driving unit can drive the pawl to rotate by controlling the unlocking lever;

[0021] The thrust nut in the driving unit can drive the lock hook to rotate by controlling the locking connecting rod.

[0022] The thrust nut comprises a nut body, on which a nut push column is arranged; on the locking lever a push column pin is arranged; and the nut push column and the push column pin are used in cooperation with each other.

[0023] The nut push column and the push column pin are arranged to intersect.

[0024] The first transmission component includes a primary large gear and a primary small gear; the second transmission component includes a secondary gear and a driving screw; a driving unit is provided on the driving screw; a thrust nut in the lock body assembly is sleeved on the driving screw.

[0025] The first transmission component is a double gear; the secondary gear and the driving screw are an integrated structure; the secondary gear and the driving screw are connected by injection molding; the first large gear is a helical gear; and the secondary gear is a spur gear.

[0026] The first-stage large gear, the first-stage small gear, the second-stage gear and the thrust nut are made of plastic materials; the driving screw rod and the pushing pin are made of metal materials.

[0027] The tailgate lock also includes an emergency unlocking mechanism;

[0028] The emergency unlocking mechanism includes an emergency reset lever and an emergency unlocking lever;

[0029] The emergency reset lever is connected to the housing assembly via a rotating portion, and the emergency reset lever extends into the housing assembly and cooperates with the locking connecting rod;

[0030] The emergency unlocking lever is connected to the housing assembly via a rotating portion; the emergency unlocking lever extends into the housing assembly and cooperates with the unlocking lever.

[0031] The emergency reset lever is connected to the emergency unlock lever through a linkage portion; the linkage portion includes a linkage rod arranged on the emergency unlock lever; the emergency reset lever and the emergency unlock lever are arranged to intersect; the emergency reset lever is pressed on the linkage rod.

[0032] The housing assembly comprises a transverse housing and a longitudinal housing; the transverse housing is arranged to intersect with the longitudinal housing;

[0033] The transverse housing comprises a lock body shell, wherein a bottom plate is provided inside the lock body shell and a lock body shell is arranged on the bottom plate;

[0034] The longitudinal housing includes an actuator housing and an actuator upper cover;

[0035] The drive assembly is arranged in the longitudinal housing;

[0036] The lock body assembly is arranged in the transverse housing.

[0037] The advantages of the utility model are:

[0038] The utility model discloses a tailgate lock for an electric tailgate system.

[0039] The tailgate lock disclosed by the utility model can well reduce the lateral size of the tailgate lock actuator through the stacking arrangement of the first transmission component and the second transmission component, so that when the tailgate lock is subsequently installed, the requirements for the thickness of the tailgate and the corresponding rear door can be reduced, thereby facilitating the actual arrangement of the tailgate lock. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The following is a brief description of the contents expressed in each of the drawings of the utility model specification and the marks in the drawings:

[0041] Figure 1 It is a structural schematic diagram of the utility model.

[0042] Figure 2 It is a structural schematic diagram of the lock body assembly of the utility model.

[0043] Figure 3 It is a structural schematic diagram of the utility model after the lock body assembly is connected to the emergency unlocking mechanism.

[0044] Figure 4 It is an explosion schematic diagram of the utility model.

[0045] Figure 5 It is a schematic diagram of the emergency reset lever, the emergency unlocking lever and the actuator housing embedded in soft rubber of the utility model.

[0046] Figure 6 It is a structural schematic diagram of the copper sheet of the connector of the utility model.

[0047] Figure 7 It is a schematic diagram of the connector and the actuator housing of the utility model being injection molded as one body.

[0048] Figure 8 It is a structural schematic diagram of the utility model after removing the actuator upper cover.

[0049] Fig. 9 It is a schematic diagram of the internal structure of the utility model.

[0050] The marks in the above figure are:

[0051] 1. Motor, 2. Primary worm gear, 101. First transmission component, 102. Second transmission component, 4. Primary large gear, 5. Primary small gear, 7. Secondary gear, 8. Thrust nut, 9. Screw, 11. Ratchet rivet, 12. Lock hook rivet, 13. Ratchet spring, 14. Ratchet, 15. Ratchet spring, 16. Lock hook, 19. Unlocking lever, 22. Push pin, 23. Locking lever, 24. Reset switch, 25. Ratchet switch, 26. Lock hook switch, 27. Emergency unlocking lever, 28. Emergency reset lever, 31. Actuator housing, 32. Connector copper sheet, 33. Lock body housing, 34. Soft rubber, 35. Lock body housing, 36. Bottom plate, 37. Actuator cover, 38. Screws, 39. Connector. DETAILED DESCRIPTION

[0052] The specific implementation methods of the present utility model will be further explained in detail below by describing the optimal embodiments with reference to the accompanying drawings.

[0053] A tailgate lock for an electric tailgate system comprises a housing assembly and a lock body assembly; the lock body assembly comprises a drive assembly; the drive assembly comprises a drive motor 1, and the drive motor 1 is connected to the lock body assembly through a transmission mechanism; the transmission mechanism comprises a primary worm 2 connected to the motor 1, a first transmission component 101 and a second transmission component 102; the first transmission component 101 and the second transmission component 102 are stacked; the tailgate lock disclosed by the utility model can well reduce the lateral size of the tailgate lock actuator through the stacked arrangement of the first transmission component 101 and the second transmission component 102, so that when the tailgate lock is subsequently installed, the requirements for the thickness of the tailgate and the corresponding back door can be reduced, thereby facilitating the actual arrangement of the tailgate lock.

[0054] At the same time, it should be noted that the stacked arrangement of the first transmission component 101 and the second transmission component 102 of the utility model essentially tends to be stacked in the longitudinal space, and in the subsequent arrangement, the stacked connection can be achieved by the meshing of gears.

[0055] Meanwhile, when the first transmission component 101 and the second transmission component 102 of the present invention are arranged on the whole vehicle, the first transmission component 101 and the second transmission component 102 are arranged along the Z direction of the whole vehicle.

[0056] A tailgate lock for an electric tailgate system comprises a housing assembly and a lock body assembly; the housing assembly and the lock body assembly disclosed in the utility model form the main structure of the tailgate lock, and the lock body assembly in the utility model comprises the self-priming mechanism, a driving assembly and a lock body assembly; the driving assembly is connected to the lock body assembly through the self-priming mechanism; in subsequent use, the corresponding action of the driving assembly can drive the self-priming mechanism to move, thereby realizing the rotation of the lock hook 16, realizing the opening and closing of the tailgate lock; and the lock body assembly comprises a lock hook 16 and a ratchet 14 arranged in the housing assembly; the lock hook 16 cooperates with the lock buckle when in use to realize The door body should be locked in closure; the pawl 14 plays a good limiting role, which is convenient for controlling the position of the lock hook 16, so that it can overcome the rotational force of the torsion spring connected to it, so that the lock hook 16 remains in position; so when in use, the pawl 14 is used in conjunction with the lock hook 16; when the tailgate lock is closed, the pawl 14 and the lock hook 16 are engaged with each other, and the pawl 14 limits the position of the lock hook 16, and when the tailgate lock needs to be opened, the pawl 14 rotates, so that the pawl 14 is disengaged from the lock hook 16, so that the restraining force of the pawl 14 on the lock hook 16 is released, so that the lock hook 16 returns to its position driven by the corresponding torsion spring, thereby realizing the actual unlocking operation.

[0057] At the same time, in the utility model, the self-priming mechanism mainly plays a linkage role, which is convenient for the driving component to control the working condition of the lock body component during actual use.

[0058] Specifically, in the utility model, the self-priming mechanism also includes an unlocking lever 19; the unlocking lever 19 is used in conjunction with the pawl 14; the locking hook 16 is used in conjunction with the locking link 2-2 in the self-priming mechanism; the thrust nut 8 in the driving unit can drive the pawl 14 to rotate by controlling the unlocking lever 19; the thrust nut 8 in the driving unit can drive the locking hook 16 to rotate by controlling the locking link 2-2; based on the above design, the self-priming mechanism can change the position of the locking hook 16 under the drive and push of the thrust nut 8, and then realize the corresponding unlocking and locking operations.

[0059] The self-priming mechanism disclosed in the utility model mainly includes a driving unit and a control unit; the driving unit includes a thrust nut 8; the thrust nut 8 includes a nut body 81, and a nut push column 82 is provided on the nut body 81; the control unit includes a locking connecting rod 2-2; the locking connecting rod 2-2 includes a locking lever 23; a pushing column pin 22 is provided on the locking lever 23; the nut push column 82 is used in conjunction with the pushing column pin 22; the self-priming mechanism disclosed in the utility model uses the thrust nut 8 with the nut push column 82 and the locking lever 23 with the pushing column pin 22 in conjunction with each other, so that the nut push column 82 and the pushing column pin 22 are in point contact, which can reduce the wear between the parts and increase the service life; at the same time, the contact noise between the thrust nut 8 and the locking lever 23 can be low, the friction force is small, and the transmission is smoother and more stable.

[0060] The self-priming mechanism disclosed in the utility model is mainly used in the field of self-priming locks, is located inside the self-priming lock, and is used to control the opening and closing of the self-priming lock; the tailgate lock disclosed in the utility model is essentially a self-priming lock structure.

[0061] Specifically, the self-priming mechanism disclosed in the utility model mainly includes a driving unit and a control unit; the control unit is mainly used to control the rotation of the lock hook 16 or the pawl 14 in the tailgate lock to realize the opening and closing control of the tailgate lock; and the setting of the driving unit is mainly used to drive the control unit to act, so as to facilitate the change of the working condition of the tailgate lock.

[0062] In addition, the driving unit described in the utility model includes a thrust nut 8; the thrust nut 8 is sleeved on the driving screw 9 of the driving assembly, and the position of the thrust nut 8 is subsequently changed by rotating the driving screw 9. At the same time, the utility model requires that the thrust nut 8 performs linear motion, so in actual use, it needs to be used in conjunction with the shell assembly. Through the limiting of the shell assembly, the thrust nut 8 cannot rotate with the driving screw 9. Based on such a setting, the rotational motion of the thrust nut 8 is converted into linear motion.

[0063] At the same time, in the utility model, the thrust nut 8 includes a nut body 81, which is the main structure of the thrust nut 8, and a nut push column 82 is provided on the nut body 81; the nut push column 82 is mainly used in conjunction with the locking lever 23 and the unlocking lever 19, and the locking and unlocking operations of the lock hook 16 are realized by pushing or driving the corresponding lever to perform corresponding actions.

[0064] The control unit includes a locking link 2-2; in the utility model, the main structure of the locking link is similar to the self-priming mechanism, self-priming lock and vehicle disclosed in Patent 201821332605.0-Self-priming Lock; the overall action and control logic are also similar. The main difference between the utility model and the patent is the structure. In the utility model, the locking link 2-2 includes a locking lever 23; the locking lever 23 is used to push the lock hook 16, which is convenient for the rotation and locking of the lock hook 16 during subsequent use, and a pushing pin 22 is provided on the locking lever 23; the nut push column 82 is used in conjunction with the pushing pin 22; the setting of the pushing pin 22 forms a protrusion on the locking lever 23, and when used later, the nut push column 82 on the thrust nut 8 and the pushing pin 22 are used in conjunction with each other; based on such a setting, the contact area between the traditional drive unit and the unlocking lever 19 can be changed to reduce the friction noise during operation.

[0065] Furthermore, in the utility model, the nut push column 82 and the pushing column pin 22 are arranged to intersect each other; based on such an arrangement, the utility model makes the nut push column 82 and the pushing column pin 22 form a point contact, and when the thrust nut 8 subsequently pushes the unlocking lever 19, the friction between the two is always a point contact, thereby reducing the contact noise, reducing the friction force, and making the transmission smoother and more stable.

[0066] At the same time, a lubricating layer is provided on the push pin 22 in the utility model, and the setting of the lubricating layer can better reduce the friction between the push pin 22 and the nut push pin 82, and reduce the contact noise. Of course, other coatings that can reduce the roughness of the outer surface of the push pin 22 are also feasible, and can be selected according to needs.

[0067] In actual selection, the type of lubricating layer can be selected according to needs, for example, a Teflon layer can be selected.

[0068] Furthermore, the tailgate lock described in the present invention also includes an emergency unlocking mechanism; through the provision of the emergency unlocking mechanism, the emergency unlocking mechanism can be controlled to unlock the tailgate lock in an emergency to ensure the safety of members.

[0069] Specifically, the emergency unlocking mechanism disclosed in the present invention includes an emergency reset lever 28 and an emergency unlocking lever 27; the emergency reset lever 28 and the emergency unlocking lever 27 respectively control the corresponding locking lever 23 and unlocking lever 19, thereby realizing the corresponding unlocking operation.

[0070] The emergency reset lever 28 of the utility model is connected to the housing assembly through a rotating part, and the emergency reset lever 28 extends into the interior of the housing assembly and is used in conjunction with the locking link 2-2; the emergency unlocking lever 27 is connected to the housing assembly through a rotating part; the emergency unlocking lever 27 extends into the interior of the housing assembly and is used in conjunction with the unlocking lever 19; the emergency reset lever 28 and the emergency reset lever 28 are connected to the housing assembly by a rotating part near the middle area, where the rotating part can rotate the shaft and the rotating pin and other structures, which are the corresponding rotation points of the emergency unlocking lever 27 and the emergency reset lever 28 in subsequent use. During subsequent use, by pulling or pushing the emergency reset lever 28, the emergency reset lever 28 drives the emergency unlocking lever 27 to move. The emergency reset lever 28 is located at one end of the housing assembly and moves the locking link 2-2 to disengage the lock hook 16, thereby releasing the push of the lock hook 16 by the locking link 2-2. At the same time, the emergency unlocking lever 27 pushes the unlocking lever 19 to rotate, so that the unlocking lever 19 pushes the pawl 14 to rotate, thereby releasing the restraint of the pawl 14 on the lock hook 16, and causing the lock hook 16 to rotate under the drive of the torsion spring connected to it, thereby realizing the unlocking operation of the tailgate lock.

[0071] Furthermore, in the present invention, the emergency reset lever 28 and the emergency unlocking lever 27 are connected through a linkage part; through the setting of the linkage part, the linkage of the movement of the emergency reset lever 28 and the emergency unlocking lever 27 can be achieved. There are various ways to set the linkage part, as long as the linkage movement of the emergency reset lever 28 and the emergency unlocking lever 27 can be achieved. In essence, as long as the movement of the emergency reset lever 28 can be controlled, the emergency reset lever 28 can drive the movement of the emergency unlocking lever 27, which is theoretically feasible.

[0072] Of course, for better implementation effect, the utility model includes a linkage rod 271 arranged on the emergency unlocking lever 27; the emergency reset lever 28 is arranged to intersect with the emergency unlocking lever 27; the emergency reset lever 28 is pressed on the linkage rod 271; the linkage rod 271 is equivalent to adding a transverse rod structure to the emergency unlocking lever 27. When the emergency reset lever 28 is pulled or pushed, the emergency reset lever 28 squeezes the linkage rod 271, and the linkage rod 271 drives the emergency unlocking lever 27 to rotate under the action of squeezing, thereby realizing the corresponding rotation operation.

[0073] Furthermore, in the utility model, the shell assembly includes a transverse shell 1-1 and a longitudinal shell 1-2; the transverse shell 1-1 of the utility model is mainly used for the arrangement and placement of the lock body assembly, and the longitudinal shell 1-2 is mainly used for the installation and arrangement of the drive assembly. At the same time, in the utility model, the transverse shell 1-1 and the longitudinal shell 1-2 are arranged to intersect; here, the angle between the transverse shell 1-1 and the longitudinal shell 1-2 can be selected according to the actual working conditions, and it is generally required that the angle between the longitudinal shell 1-2 and the transverse shell 1-1 is an obtuse angle. Such a setting can reduce the overall height of the shell assembly and facilitate the arrangement in the tailgate during subsequent use.

[0074] At the same time, in the utility model, the transverse shell 1-1 includes a lock body shell 33, which serves as an external protection. The lock body shell is used for the installation and arrangement of components such as the lock hook 16 and the pawl 14. The setting of the bottom plate 36 facilitates the connection and installation of components such as the lock body shell and the actuator shell 31; specifically, in the utility model, the lock body shell 33 is provided with a bottom plate 36 and a lock body shell arranged on the bottom plate 36. Through the setting of the lock body shell 33, the bottom plate 36 and the lock body shell, the arrangement and placement of the lock body assembly in the shell assembly is facilitated.

[0075] At the same time, in the utility model, the longitudinal shell 1-2 includes an actuator shell 31 and an actuator cover 37; the coordinated use of the actuator shell 31 and the actuator cover 37 facilitates the arrangement of the drive assembly, and also facilitates the design and placement of components such as connector copper sheets.

[0076] In addition, in the present invention, the driving assembly is arranged in the longitudinal shell 1-2; the lock body assembly is arranged in the transverse shell 1-1; the driving assembly includes a driving motor 1, and the driving motor 1 is connected to the thrust nut 8 through a transmission mechanism; the transmission mechanism includes a driving screw 9; the thrust nut 8 is sleeved on the driving screw 9; the driving screw 9 and the transverse shell 1-1 are arranged parallel to each other; the driving motor 1 drives the driving screw 9 to rotate through the transmission mechanism, and the driving screw 9 adjusts the thrust nut 8 to have a tendency to rotate, and the thrust nut 8 is limited by the inner cavity of the shell assembly, so that the thrust nut 8 cannot rotate, and because of the rotation of the driving screw 9, the thrust nut 8 will move laterally along the axial direction of the driving screw 9; thereby facilitating the control of the action of the self-priming mechanism during subsequent use.

[0077] Furthermore, in the utility model, the transmission mechanism includes a primary worm 2 connected to the motor 1, a first transmission component 101 and a second transmission component 102; the first transmission component 101 includes a primary large gear 4 and a primary small gear 5; the second transmission component 102 includes a secondary gear 7 and a driving screw 9; a driving unit is provided on the driving screw 9; through the setting of the transmission mechanism, the utility model can realize the electric unlocking and electric locking of the tailgate lock using a motor 1 and a set of transmission mechanisms, achieving the purposes of fewer parts, small size, light weight, simple structure and low cost.

[0078] Furthermore, in the present invention, the first transmission component 101 and the second transmission component 102 are stacked; based on such a configuration, the first transmission component 101 and the second transmission component 102 are equivalent to being distributed along the Z axis of the vehicle when assembled on the vehicle. Such a configuration can reduce the lateral width occupied by the transmission mechanism, thereby reducing the dependence on the thickness of the rear door; in other words, through such an arrangement, the arrangement of the tailgate lock in the rear door can be made more convenient, and at the same time, the overall thickness of the actuator housing 31 can be reduced, which is more convenient for actual installation and arrangement.

[0079] At the same time, during actual assembly, the driving screw rod 9 and the transverse shell 1 - 1 are arranged parallel to each other; such an arrangement facilitates the thrust nut 8 to move laterally on the driving screw rod 9, so that each lever can be better controlled.

[0080] Furthermore, in the present invention, the first transmission component 101 is a double gear; the secondary gear 7 and the driving screw 9 are an integrated structure; the secondary gear 7 and the driving screw 9 are connected by injection molding; the first large gear 4 is a helical gear; the secondary gear 7 is a spur gear; the present invention adopts a worm-helical gear, spur gear-thrust nut 8 reduction scheme, with a large reduction ratio and a simple structure; a small-power motor 1 can be selected for the same output force requirement, thereby reducing the volume, weight and cost of the motor 1.

[0081] In addition, the first transmission component 101 is a double gear; the secondary gear 7 and the driving screw 9 are an integrated structure; the secondary gear 7 and the driving screw 9 are connected by injection molding; such a setting ensures the integrity of the first transmission component 101 and the second transmission component 102, reduces the existence of separate parts, and facilitates subsequent assembly operations.

[0082] Furthermore, in the utility model, the first large gear 4 and the first small gear 5, the second gear 7 and the thrust nut 8 in the first transmission component 101 are made of plastic materials; the driving screw 9 and the pushing pin 22 are made of metal materials; through the above design, the problem of noise easily generated by friction between metals can be solved, and the cost of a single part can be reduced.

[0083] specific:

[0084] The utility model discloses a tailgate lock for an electric tailgate system; the tailgate lock mainly comprises a shell component and a lock body assembly, the lock body assembly comprises a self-priming mechanism, a driving component and a lock body assembly; the driving component comprises a driving motor 1, and the driving motor 1 is connected to the lock body assembly through a transmission mechanism and the self-priming mechanism.

[0085] The transmission mechanism includes a primary worm 2 fixedly connected to the motor 1 and a primary large gear 4 meshing with the primary worm 2; includes a primary small gear 5 fixedly connected to the above-mentioned primary large gear 4, and a secondary gear 7 meshing with the primary small gear 5; also includes a screw 9 fixedly connected to the above-mentioned secondary gear 7 and a thrust nut 8 screwed therewith, and the thrust nut 8 is used to output thrust to the unlocking lever 19 and the locking lever 23 when unlocking and locking.

[0086] The lock body assembly disclosed in the utility model includes a ratchet 14, a lock hook 16, a ratchet switch 25, a lock hook switch 26, a reset switch 24, a connector copper sheet 32, a ratchet spring 15 applying elastic force to the ratchet 14 and a lock hook spring 15 applying elastic force to the lock hook 16, the ratchet 14 cooperates with an unlocking lever 19, the ratchet 14 and the ratchet spring 13 are sequentially mounted on the ratchet rivet 11, the ratchet rivet 11 is riveted on the bottom plate 36 of the housing assembly, the lock hook 16 and the lock hook spring 15 are sequentially mounted on the lock hook rivet 12, and the lock hook rivet 12 is riveted on the bottom plate 36. The ratchet switch 25, the lock hook switch 26, and the reset switch 24 are mounted on the actuator housing 31.

[0087] The actuator upper cover 37 is mounted on the actuator housing 31 and the bottom plate 36 by means of screws 38 . The actuator housing 31 is mounted in cooperation with the lock housing 35 by means of screws 38 , and is positioned and mounted on the bottom plate 36 by means of positioning pins.

[0088] The connector copper sheet 32 ​​is embedded in the actuator housing 31. Figure 4 .

[0089] When the drive assembly rotates forward, the thrust nut 8 pushes the unlocking lever 19 to rotate; the unlocking lever 19 pushes the pawl 14 to rotate, and the lock hook 16 is pushed to the unlocking position under the elastic force applied by the lock hook spring 15 and the body seal reaction force, realizing electric unlocking. After unlocking is completed, the drive assembly reverses and resets; see Figure 4 .

[0090] The driving assembly is reversed, the thrust nut 8 pushes the locking lever 23 to rotate, and drives the push pin 22 to push the lock hook 16 to rotate; the lock hook 16 overcomes the elastic force applied by the lock hook spring 15 and the body seal reaction force to rotate to the full lock position, realizing the electric self-priming lock. After the lock is completed, the driving assembly is reset in the forward direction; see Figure 4 .

[0091] When the ratchet 14, the lock hook 16, and the thrust nut 8 are in motion, their structural features will trigger the ratchet switch 25, the lock hook switch 26, and the reset switch 24. The combined information of the ratchet switch 25, the lock hook switch 26, and the reset switch 24 represents the state of the lock body. The combined information is fed back to the controller in real time through the connector copper sheet 32. The controller determines the state of the lock body according to the combined information and controls the tailgate lock.

[0092] The utility model adopts a deceleration scheme of worm-helical gear, spur gear-helical nut 8, with a large reduction ratio and a simple structure; a small power motor 1 can be selected for the same output force requirement, thereby reducing the volume, weight and cost of the motor 1.

[0093] At the same time, the pushing pin 22 on the locking lever 23 and the thrust nut 8 are in rolling point contact. Specifically, when the thrust nut 8 outputs thrust, the cylindrical surface features of the thrust nut 8 contact the cylindrical surface features of the pushing pin 22 on the locking lever 23, and the locking lever 23 rotates around its own axis. The contact point between the two is a rolling point contact.

[0094] This double cylindrical staggered structure design of rolling point contact can reduce contact noise, reduce friction, and make transmission smoother and more stable.

[0095] In addition, an emergency unlocking mechanism is provided on the shell assembly for realizing reset and unlocking linkage in an emergency situation; the emergency unlocking mechanism includes an emergency reset lever 28 and an emergency unlocking lever 27; the emergency reset lever 28 and the emergency unlocking lever 27 respectively control the corresponding locking lever 23 and the unlocking lever 19, thereby realizing the corresponding unlocking operation.

[0096] In an emergency, the emergency reset lever 28 can be toggled to push the locking lever 23 to rotate and disengage from the lock hook 16, thereby achieving a mechanical reset function.

[0097] At the same time, the emergency reset lever 28 is continuously moved, so that it continues to rotate and contacts the emergency unlocking lever 27 and exerts a force; the emergency unlocking lever 27 rotates and pushes the unlocking lever 19 to rotate, and the unlocking lever 19 pushes the pawl 14 to move, thereby disengaging the pawl 14 from the lock hook 16 to achieve unlocking, thereby ensuring the safety of the occupants in the car; see Figure 2 .

[0098] The connector copper sheet 32 ​​is injection molded in the actuator housing 31, and the connector 39 and the actuator housing 31 are injection molded as one, which reduces the number of parts and reduces the product cost; Figure 4 .

[0099] The lock body shell 35 of the utility model is embedded with soft rubber 34. When locked, the soft rubber contacts the lock buckle to buffer the impact of the lock buckle, which not only protects the shell but also reduces noise.

[0100] The utility model can achieve the following benefits:

[0101] The utility model uses a motor 1 and a set of transmission mechanisms to realize the electric unlocking and electric locking of the tailgate lock, thereby achieving the purposes of fewer parts, small size, light weight, simple structure and low cost.

[0102] The utility model adopts a worm-bevel gear, spur gear-helical nut 8 reduction scheme, with a large reduction ratio and a simple structure; a small power motor 1 can be selected for the same output force requirement, thereby reducing the volume, weight and cost of the motor 1.

[0103] The push pin 22 on the locking link 23 is in rolling point contact with the thrust nut 8. Specifically, when the thrust nut 8 outputs thrust, the cylindrical surface feature of the thrust nut 8 contacts the cylindrical surface feature of the push pin 22 on the locking lever 23. The locking lever 23 rotates around its own axis, and the contact point between the two is rolling point contact. This double cylindrical surface staggered structure design of rolling point contact can reduce contact noise, reduce friction, and make transmission smoother and more stable.

[0104] At the same time, an emergency unlocking mechanism is provided on the housing assembly for realizing reset and unlocking linkage in an emergency situation; the emergency unlocking mechanism includes an emergency reset lever 28 and an emergency unlocking lever 27; the emergency reset lever 28 and the emergency unlocking lever 27 respectively control the corresponding locking lever 23 and the unlocking lever 19, thereby disengaging the pawl 14 from the lock hook 16 to realize unlocking, thereby ensuring the safety of the occupants in the car.

[0105] The utility model lock body shell 35 is embedded with soft rubber 34, and when locked, the soft rubber contacts the lock buckle to buffer the impact of the lock buckle, which not only protects the shell, but also reduces noise; Figure 2 .

[0106] Attached Figure 1-3 shown.

[0107] The electric locking process of the tailgate lock disclosed in the utility model is as follows: when the tailgate lock reaches the semi-locked state, the system detects the switch signal, the ECU sends a locking signal, the motor 1 starts to work, the transmission mechanism transmits the power to the nut 8, the nut 8 moves along the axial direction of the driving screw 9, and according to the attached figure, it moves along the positive direction of the X axis, the nut push column 82 pushes the column pin 22 to make the locking link 2-2 start to move, and the four-bar linkage here is the above-mentioned locking link 2-2; in the locking link 2 -2 A slot 201 is provided near one end of the lock hook 16, and a lock hook flange 16.1 is provided on the lock hook 16; when in use, the slot 201 abuts against the lock hook flange 16.1, pushing the lock hook 16 to rotate in a clockwise direction to reach the fully locked position, the pawl 14 is provided with a locking flange 14.1, and the lock hook 16 is provided with a locking groove 16.2; the locking flange 14.1 on the pawl 14 abuts against the locking groove 16.2, so that the lock hook 16 reaches a stable state, and the electric locking process is completed.

[0108] The electric unlocking process is as follows: the ECU sends an unlocking signal, the motor 1 starts working, the transmission mechanism transmits power to the thrust nut 8, the thrust nut 8 moves along the negative direction of the X-axis, pushing the unlocking lever 19 to rotate clockwise, and the unlocking lever 19 pushes the pawl 14 to rotate counterclockwise, so that the locking flange 14.1 and the locking groove 16.2 are disengaged, and the lock hook 16 is opened under the action of the torsion spring.

[0109] When the nut 8 is in the initial position, the emergency unlocking process is as follows: manually pull the finger pad 28.1 on the emergency reset lever 28, the emergency reset lever 28 rotates around the emergency reset lever pin hole 28.2, the emergency reset lever 28 presses on the pin shaft of the emergency unlocking lever 27, so that the emergency unlocking lever 27 rotates around the emergency unlocking lever pin hole 27.2, and the emergency unlocking lever push head 27.3 pushes the pawl 14 to rotate to achieve emergency unlocking.

[0110] When the power is cut off in an emergency, the emergency unlocking process is as follows: manually pull the finger pad 28.1 on the emergency reset lever 28, the emergency reset lever 28 rotates around the emergency reset lever pin hole 28.2, and the emergency reset lever push head 28.3 pushes the locking link 2-2 to disengage the slot 201 and the lock hook flange 16.1 to achieve emergency reset. At the same time, the emergency reset lever 28 presses on the emergency unlock lever pin shaft, so that the emergency unlock lever 27 rotates around the emergency unlock lever pin hole 27.2, and the emergency unlock lever push head 27.3 pushes the pawl 14 to rotate to achieve emergency unlocking.

[0111] In particular, emergency resetting and emergency unlocking can be accomplished simultaneously by only pulling the emergency resetting lever 28; the operation is simple, and misoperation caused by a complicated operation process can be avoided.

[0112] Obviously, the specific implementation of the present invention is not limited by the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, they are all within the protection scope of the present invention.

Claims

1. A tailgate lock for an electric tailgate system, characterized in that: It includes a housing component and a lock body assembly; the lock body assembly includes a drive component; The driving assembly includes a driving motor, and the driving motor is connected to the lock body assembly through a transmission mechanism; The transmission mechanism includes a primary worm connected to the motor, a first transmission component and a second transmission component; The first transmission component and the second transmission component are stacked.

2. The tailgate lock for an electric tailgate system according to claim 1, characterized in that: The lock body assembly includes a drive component, a self-priming mechanism and a lock body component; The driving assembly is connected to the lock body assembly via a self-priming mechanism; The self-priming mechanism comprises a driving unit and a control unit; The drive unit comprises a thrust nut; The control unit includes a locking link; the locking link includes a locking lever; The lock body assembly includes a lock hook and a pawl arranged in the housing assembly; the pawl cooperates with the lock hook for use; The self-priming mechanism also includes an unlocking lever; the unlocking lever is used in conjunction with a ratchet pawl; The locking hook is used in conjunction with the locking connecting rod in the self-priming mechanism; The thrust nut in the driving unit can drive the pawl to rotate by controlling the unlocking lever; The thrust nut in the driving unit can drive the lock hook to rotate by controlling the locking connecting rod.

3. The tailgate lock for an electric tailgate system according to claim 2, characterized in that: The thrust nut comprises a nut body, on which a nut push column is arranged; on the locking lever a push column pin is arranged; and the nut push column and the push column pin are used in cooperation with each other.

4. The tailgate lock for an electric tailgate system according to claim 3, characterized in that: The nut push column and the push column pin are arranged to intersect.

5. The tailgate lock for an electric tailgate system according to claim 1, characterized in that: The first transmission component includes a primary large gear and a primary small gear; the second transmission component includes a secondary gear and a driving screw; a driving unit is provided on the driving screw; a thrust nut in the lock body assembly is sleeved on the driving screw.

6. The tailgate lock for an electric tailgate system according to claim 5, characterized in that: The first transmission component is a double gear; the secondary gear and the driving screw are an integrated structure; the secondary gear and the driving screw are connected by injection molding; the first large gear is a helical gear; and the secondary gear is a spur gear.

7. The tailgate lock for an electric tailgate system according to claim 5, characterized in that: The first-stage large gear, the first-stage small gear, the second-stage gear and the thrust nut are made of plastic materials; the driving screw rod and the pushing pin in the lock body assembly are made of metal materials.

8. The tailgate lock for an electric tailgate system according to claim 1, characterized in that: The tailgate lock also includes an emergency unlocking mechanism; The emergency unlocking mechanism includes an emergency reset lever and an emergency unlocking lever; The emergency reset lever is connected to the housing assembly via a rotating portion, and the emergency reset lever extends into the housing assembly and cooperates with the locking connecting rod; The emergency unlocking lever is connected to the housing assembly via a rotating portion; the emergency unlocking lever extends into the housing assembly and cooperates with the unlocking lever.

9. The tailgate lock for an electric tailgate system according to claim 8, characterized in that: The emergency reset lever is connected to the emergency unlock lever through a linkage portion; the linkage portion includes a linkage rod arranged on the emergency unlock lever; the emergency reset lever and the emergency unlock lever are arranged to intersect; The emergency reset lever is pressed onto the linkage rod.

10. A tailgate lock for an electric tailgate system according to any one of claims 2 to 4, characterized in that: The housing assembly comprises a transverse housing and a longitudinal housing; the transverse housing is arranged to intersect with the longitudinal housing; The transverse housing comprises a lock body shell, wherein a bottom plate is provided inside the lock body shell and a lock body shell is arranged on the bottom plate; The longitudinal housing includes an actuator housing and an actuator upper cover; The drive assembly is arranged in the longitudinal housing; The lock body assembly is arranged in the transverse housing.

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