Electrically-actuated and electrically-opened back door lock

Abstract

The invention relates to an electric suction and electric opening back door lock, and belongs to the technical field of automobile door lock structures. The invention discloses an electric pull-in and electric opening back door lock which comprises an electric actuating mechanism, a locking mechanism, a signal feedback system, a pull-in mechanism and an opening mechanism, the actuator transmission mechanism adopts two switches, the closed-loop control reliability is high, dynamic torque control is supported, and a suction motor, a release motor, an electric actuating mechanism, a locking mechanism, a suction mechanism and a signal feedback system are highly integrated in a compact and lightweight lock body module. Through wire harness connection between the switch and the terminal, complexity is reduced, and reliability is improved. A single-motor double-function mechanism is developed, two actions of pull-in locking and opening and releasing are realized by using one motor through ingenious mechanical design, and the cost, the weight and the size are remarkably reduced.

Description

Technical Field

[0001] The invention relates to an electrically closed and opened tailgate lock, belonging to the technical field of automobile door lock structures. Background Art

[0002] With the development of science and technology and the progress of the times, the application of electric opening and closing of car doors has become more and more widespread. Therefore, the tailgate (back door / trunk) of motor vehicles has begun to adopt tailgate locks with electric opening and closing functions.

[0003] Traditional electric suction locks have the following main defects: 1. Generally, these back door locks are equipped with a drive motor and three position switches. The forward and reverse rotation of the drive motor unlocks and locks the back door. These three switches identify the back door's open, partially locked, and fully locked positions, as well as the position of the actuator mechanism. However, the actuator mechanism in traditional back door locks typically uses only one switch, which can only identify the initial position and cannot fully identify the specific position of electrical engagement or release, or the end position. This has low tolerance for component tolerances, aging, and environmental changes (such as increased lubrication viscosity at low temperatures). If the actual travel is insufficient due to increased resistance, mechanical wear, or low temperatures, a "false lock" (incomplete locking) may occur. If the resistance decreases, "overengagement" (overtightening, damaging the mechanism) may occur.

[0004] 2. Traditional electric suction locks are heavy, too large, and have a complex internal structure (usually containing two motors, one for electric suction and one for electric opening; the mechanical structure of gears, cables, connecting rods, etc. is complex), and there are too many mechanical failures.

[0005] 3. In order to ensure sufficient suction capacity, most of the internal transmission parts of traditional electric suction locks are made of metal, resulting in design redundancy, and the weight, volume and cost are not competitive. Summary of the Invention

[0006] The present invention aims to solve the various problems mentioned above and further provide an electric closing and opening tailgate lock.

[0007] In order to solve the above problems, the technical solution adopted by the present invention is: An electrically closed and opened tailgate lock, comprising an electric actuator, a locking mechanism, a signal feedback system, a closing mechanism, and an opening mechanism; The electric actuator includes a transmission nut slidably adapted on the lead screw, the transmission nut having a signal triggering portion and a power output portion, the signal triggering portion is used to touch the signal feedback system, and the power output portion is used to drive and control the suction mechanism and the opening mechanism; The locking mechanism includes a card plate and a stop claw that are adapted to each other, the card plate having a card plate signal triggering portion for a touch signal feedback system and a card plate operating portion for controlling the suction mechanism, and the stop claw having a stop claw operating portion driven and controlled by an opening mechanism; The signal feedback system includes a first signal component and a second signal component; the first signal component is configured in the locking mechanism and includes switch 1 and switch 2 controlled by the card plate signal trigger unit; the second signal component is configured in the electric actuator and includes switch 3 and switch 4 triggered by the signal trigger unit of the transmission nut; The suction mechanism includes a rotatably mounted suction driving rod and a suction pushing rod rotatably mounted on the upper surface of the suction driving rod by a torsion spring of the suction pushing rod, the suction driving rod having a first limiting surface of the suction driving rod, a second limiting surface of the suction driving rod and a bent surface of the suction driving rod, wherein the first limiting surface of the suction driving rod is used to contact and limit with the protrusion of the substrate, the second limiting surface of the suction driving rod is used to abut and cooperate with the suction pushing rod, and the bent surface of the suction driving rod is used to abut and cooperate with the power output part of the transmission nut; the suction pushing rod has a suction pushing rod fork-shaped portion, a suction pushing rod protrusion and a suction pushing rod bent portion, wherein the suction pushing rod fork-shaped portion is used to abut and cooperate with the clamping plate operating portion, the suction pushing rod protrusion is used to contact and cooperate with the second limiting surface of the suction driving rod, and the suction pushing rod bent portion is used to hang the suction pushing rod torsion spring; The opening mechanism includes a rotatably mounted release lever having a release lever curved portion and a release lever flat portion. The release lever curved portion is used to abut against the power output portion of the drive nut, and the release lever flat portion is used to abut against the locking claw operating portion.

[0008] Furthermore, the electric actuator also includes a motor, a worm and a helical gear. The motor output is connected to the worm, and the helical gear is meshed with the worm for transmission. One end of the lead screw is fixedly connected to the center of the helical gear and is coaxial.

[0009] Furthermore, when the tailgate lock is electrically opened, the transmission nut moves along the first direction of the screw axis, and its power output part pushes the release rod curved surface of the release rod to drive the opening mechanism to perform the opening action; when the tailgate lock is electrically closed, the transmission nut moves along the second direction of the screw axis, and its power output part pushes the closing drive rod bent surface to control the closing mechanism to perform the closing action.

[0010] Furthermore, the card board signal triggering part is an arc surface structure, and the switch one and switch two respectively have a spring part adapted thereto. In the fully locked position, the card board signal triggering part does not press the spring part of switch one, and the signal is disconnected; in the half-locked and open positions, the card board signal triggering part presses the spring part of switch one, and the signal is triggered. Based on this principle, it is identified whether the card board is in the fully locked position; in the fully locked position and the half-locked position, the card board signal triggering part presses the spring part of switch two, and the signal is disconnected; in the open position, the card board signal triggering part does not press the spring part of switch two, and the signal is triggered. Based on this principle, it is identified whether the card board is in the half-locked position.

[0011] Furthermore, the signal triggering part of the transmission nut is set as a parallel staggered double cam structure; the switch three and switch four are respectively triggered by the signal triggering part of the transmission nut. In the static state, the signal triggering part presses switch three and switch four, and the signal is disconnected; after the electric opening is in place, the signal triggering part of the transmission nut does not press switch three, and the signal is triggered; after the electric attraction is in place, the signal triggering part of the transmission nut does not press switch four, and the signal is triggered; when the electric opening and electric attraction are reset to the position, the signal triggering part of the transmission nut presses switch three and switch four again at the same time, and the feedback vehicle body tailgate lock returns to the initial position.

[0012] Furthermore, during the attraction process of the tailgate lock, the attraction drive rod rotates around the attraction drive rod axis, and the attraction push rod protrusion is separated from the second limit surface of the attraction drive rod; there are three types of matching relationships between the attraction push rod fork-shaped portion and the card plate operating portion; in a stationary state, there is a gap between the attraction push rod fork-shaped portion and the card plate operating portion; in the initial stage of the attraction process, one edge of the attraction push rod fork-shaped portion is in unilateral contact with the card plate operating portion; as the attraction mechanism rotates, the two edges of the attraction push rod fork-shaped portion are in bilateral contact with the card plate operating portion, and the bilateral contact point changes with the rotation angle of the attraction mechanism.

[0013] Furthermore, the bent portion of the suction push rod is in sliding contact with one leg of the suction push rod torsion spring, and the torsion spring torque acts on the bent portion of the suction push rod to realize the four-bar linkage motion between the suction push rod, the suction drive rod and the clamping plate.

[0014] Furthermore, the release lever is an injection molded part, which is rotatably mounted on the fixing column of the rear cover through the release lever rotating portion.

[0015] Furthermore, the helical gear and the lead screw are fixedly connected by a threaded structure on the lead screw, and the helical gear is wrapped in the threaded area of ​​the lead screw through an injection molding process; the surface of the thread is provided with a concave and convex small tooth structure, and the thread is a double-start thread or a triple-start thread.

[0016] Compared with traditional back door locks, the main technical innovations of the electric closing and opening back door lock of the present invention are as follows: 1. The actuator transmission mechanism uses two switches for highly reliable closed-loop control: precise sensing of the starting and ending points prevents under- and over-locking issues. Dynamic torque control is supported: combined with current sensing, speed and force can be reduced near the end point, reducing impact and noise (e.g., electric pull-in end-stage buffering).

[0017] 2. Highly Integrated and Modular: The closing motor, release motor, electric actuator, locking mechanism, closing mechanism, and signal feedback system are highly integrated into a compact, lightweight lock module. Wiring harnesses connect the switch to the terminals, reducing complexity and improving reliability. A "single-motor, dual-function" mechanism has been developed, using a single motor through ingenious mechanical design to achieve both closing and releasing actions, significantly reducing cost, weight, and size.

[0018] 3. Lightweight Gear and Screw: Because the helical gear and screw are an integrated structure, high-strength engineering plastics are used instead of traditional metal components to reduce overall weight while ensuring sufficient strength. The gear and screw are connected by a threaded structure, ensuring sufficient holding strength between them. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings illustrate exemplary embodiments of the present invention and, together with the description, are used to explain the principles of the present invention and provide a further understanding of the present invention. The accompanying drawings are incorporated in and constitute a part of this specification.

[0020] Figure 1 : A schematic diagram of the appearance of an electrically closed and opened back door lock of the present invention; Figure 2 : A structural diagram of an electric actuator for an electric closing and opening back door lock according to the present invention; Figure 3 : A schematic diagram of the structure of a locking mechanism for removing a cover plate of an electrically closed and opened back door lock according to the present invention; Figure 4 : Schematic diagram of the fully locked position switch 1 and switch 2 of the electric closing and opening back door lock of the present invention; Figure 5 : Schematic diagram of switch 1 and switch 2 for the half-lock position of an electrically closed and opened back door lock according to the present invention; Figure 6 : Schematic diagram of switch 1 and switch 2 for fully open position of electric closing and opening of back door lock of the present invention; Figure 7 : Schematic diagram of the middle position of an electric actuator for an electric tailgate lock according to the present invention; Figure 8 : Schematic diagram of the electric actuator of the electric-closed and electric-opened tailgate lock of the present invention; Figure 9: Schematic diagram of an electric actuator for an electrically closed and opened back door lock according to the present invention; Figure 10 : Schematic diagram of an electrically closed and opened back door lock mechanism of the present invention; Figure 11 : Schematic diagram of a single-sided contact between the pull rod of an electrically closed and opened back door lock and the card operating part of the present invention; Figure 12 : Schematic diagram of the bilateral contact between the pull rod and the card plate operating part of the electric closing and opening back door lock of the present invention; Figure 13 : Schematic diagram of an electric-closed and electric-opened back door lock opening mechanism of the present invention; Figure 14 : Schematic diagram of the screw thread of an electric-closed and electric-opened back door lock of the present invention; Figure 15 : Schematic diagram of an electric-close and electric-open back door lock overlock buffer block of the present invention; Figure 16 : Schematic diagram of a torsion spring for an electrically closed and opened back door lock according to the present invention; In the figure, 10, motor, 20, worm, 30, bevel gear, 40, lead screw, 41, thread, 50, transmission nut, 51, internal thread part, 52, power output part, 53, signal trigger part, 60, base plate, 70, card board, 71, card board operating part, 72, card board signal trigger part, 80, stop claw, 81, stop claw operating part, 82, cylindrical rod, 90, cover, 100, pin, 110, switch one, 111, spring part, 120, switch two, 130, switch three, 140, switch four, 150, switch seat one, 160, switch seat two, 170, lock bracket, 180, upper shell, 181, fixing column, 190, wiring harness, 200, terminal, 210, suction drive rod, 211, 21. First limiting surface of the suction drive rod, 212. Second limiting surface of the suction drive rod, 213. Bending surface of the suction drive rod, 220. Suction push rod, 221. Protruding portion of the suction push rod, 222. Forked portion of the suction push rod, 223. Bending portion of the suction push rod, 230. Torsion spring of the suction push rod, 231. Leg one, 232. Leg two, 233. Leg three, 234. Spring body one, 235. Spring body two, 240. Suction drive rod shaft, 250. Suction push rod shaft, 260. Spring hanging shaft, 270. Release rod, 271. Rotating portion of the release rod, 272. Curved portion of the release rod, 273. Flat portion of the release rod, 280. Torsion spring of the release rod, 290. Bearing, 300. Bushing, 310. Overlocking buffer block, 320. Limiting shaft. DETAILED DESCRIPTION

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It will be understood that the specific embodiments described herein are intended only to explain the relevant content and are not intended to limit the present invention. It should also be noted that, for ease of description, only portions relevant to the present invention are shown in the accompanying drawings.

[0022] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0023] Unless otherwise stated, the exemplary embodiments / examples shown are to be understood as providing exemplary features of various details of some ways in which the technical concept of the present invention can be implemented in practice. Therefore, unless otherwise stated, the features of the various embodiments / examples may be further combined, separated, interchanged, and / or rearranged without departing from the technical concept of the present invention.

[0024] The present invention aims to provide an electric-close and electric-open tailgate lock with accurate signal prompts, low cost, and small size. According to one aspect of the present invention, an electric-close and electric-open tailgate lock is provided, which comprises: Electric actuators, such as Figure 2As shown, the electric actuator includes parts such as a motor 10, a worm 20, a bevel gear 30, a screw 40, and a transmission nut 50. The worm 20 is a metal part, which is rotatably mounted on the output shaft end of the motor 10 and is fixedly connected to the motor shaft. The bevel gear 30 is an injection molded part, which is driven to rotate by the worm 20 to achieve torque transmission. The screw 40 is a metal part, and its rotation axis is the same axis as the rotation axis of the bevel gear 30, and the axis is perpendicular to the rotation axis of the worm 20. The transmission nut 50 has an internal threaded portion 51, a power output portion 52 and a signal triggering portion 53. The internal threaded portion 51 of the transmission nut 50 is driven by the axial thread of the screw 40 to achieve linear motion of the transmission nut 50 along the first direction or the second direction of the screw axis. The power output portion 52 of the drive nut 50 is located below the internal threaded portion and is a cylindrical structure. When the tailgate lock is electrically unlocked, the drive nut 50 moves along the first direction of the screw axis, and its power output portion 52 pushes the release lever curved surface 272 of the release lever 270. When the tailgate lock is electrically closed, the drive nut 50 moves along the second direction of the screw axis, and its power output portion 52 pushes the curved surface 213 of the closing drive lever. The signal trigger portion 53 of the drive nut 50 is located above the internal threaded portion 51 and is designed as a parallel offset dual cam structure. The signal trigger portion 53 of the drive nut 50 is required to trigger switch three 130 and switch four 140. Because the drive nut 50 has a long travel range, this embodiment arranges switches three 130 and four 140 on different planes, i.e., adopts an offset parallel arrangement. Accordingly, the cams of the signal trigger portion 53 used to trigger switches three 130 and four 140 are also parallel offset structures.

[0025] Locking mechanism, such as Figure 3 As shown, the locking mechanism includes a base plate 60, a clamping plate 70, a pawl 80, a cover plate 90, a pin 100, and other components. The clamping plate 70 is rotatably mounted on the base plate 60 and interlocks with the vehicle door. The pawl 80 is also rotatably mounted on the base plate 60 and has a meshing portion that abuts against the teeth of the clamping plate to maintain the tailgate lock in the fully locked or partially locked position. The clamping plate 70 also has a clamping plate operating portion 71 and a clamping plate signal triggering portion 72, and the pawl 80 has a pawl operating portion 81.

[0026] The signal feedback system includes switch 1 110, switch 2 120, switch 3 130, switch 4 140, switch base 1 150, switch base 2 160, lock bracket 170, upper shell 180, wiring harness 190, terminal 200, etc. Figure 4As shown, the switch 1 110 and the switch 2 120 are welded to the wiring harness 190 respectively, and then installed in the switch seat 150 and the switch seat 2 160. Then, the switch, wiring harness and switch seat are installed together on the lock bracket 170. This series of parts is placed in the locking mechanism. The switch 1 110 and the switch 2 120 each have a spring part 111. In the fully locked position, the card plate signal trigger part 72 does not press the spring part 111 of the switch 1 110, and the signal is disconnected; in the half-locked and open positions, the card plate signal trigger part 72 presses the spring part 111 of the switch 1 110, and the signal is triggered. Based on this principle, it is identified whether the card plate 70 is in the fully locked position and the corresponding position signal is fed back to the vehicle body. In the fully locked position and the half-locked position, the card plate signal triggering part 72 presses the spring part 121 of the switch 2 120, and the signal is disconnected; in the open position, the card plate signal triggering part 72 does not press the spring part 121 of the switch 2 120, and the signal is triggered. Based on this principle, it is recognized whether the card plate 70 is in the half-locked position, and a signal is fed back to the vehicle body to control the motor 10 to power on; it can also be recognized that the power is fully opened, and a signal is fed back to the vehicle body to control the motor 10 to power off. Figure 7 As shown, the switch 3 130 and switch 4 140 are installed on the upper housing 180 and then welded to the terminal 200. This series of parts is placed in the electric actuator. The switch 3 130 and switch 4 140 are respectively triggered by the signal triggering part 53 of the transmission nut 50. In the static state, the signal triggering part 53 presses the switch 3 130 and switch 4 140, and the signal is disconnected. After the electric opening is in place, as shown in FIG. Figure 8 As shown, after the transmission nut 50 is opened in the first direction, the signal triggering part 53 of the transmission nut 50 does not press the switch 3 130, and the signal is triggered. Figure 9 As shown, after the transmission nut 50 is fully engaged in the second direction, the signal triggering unit 53 of the transmission nut 50 does not press the switch 4 140, and the signal is triggered. When the electric opening and electrical engagement are reset to the full position, the signal triggering unit 53 of the transmission nut 50 again presses the switch 3 130 and the switch 4 140 simultaneously, and the feedback body tailgate lock returns to the initial position.

[0027] Suction mechanism such as Figure 10As shown, the suction mechanism includes a suction drive rod 210, a suction push rod 220, a card operating portion 71, a suction push rod torsion spring 230, a suction drive rod shaft 240, a suction push rod shaft 250, a spring hanging shaft 260, and other parts. The suction drive rod 210 is rotatably mounted on the base plate 60 via the suction drive rod shaft 240, and has a first suction drive rod limiting surface 211, a second suction drive rod limiting surface 212, and a suction drive rod bending surface 213. When in a static state, the first suction drive rod limiting surface 211 contacts the base plate protrusion to limit position. The suction push rod 220 is rotatably mounted on the upper surface of the suction drive rod 210, and has a suction push rod protrusion 221, a suction push rod fork 222, and a suction push rod bending portion 223. When in a static state, the suction push rod protrusion 221 contacts the second suction drive rod limiting surface 212. During the closing process of the rear door lock, the closing drive rod 210 rotates around the closing drive rod shaft 240, and the closing push rod protrusion 221 separates from the second limiting surface 212 of the closing drive rod. There are three types of matching relationships between the closing push rod fork 222 and the card plate operating part 71. In the static state, there is a gap between the closing push rod fork 222 and the card plate operating part 71; in the initial stage of the closing process, one edge of the closing push rod fork 222 is in unilateral contact with the card plate operating part 71; as the closing mechanism rotates, the two edges of the closing push rod fork 222 are in bilateral contact with the card plate operating part 71. The bilateral contact point changes with the rotation angle of the closing mechanism. The bent portion 223 of the suction push rod is in sliding contact with one leg of the suction push rod torsion spring 230 , and the torsion spring torque acts on the bent portion 223 of the suction push rod to realize the four-bar linkage motion between the suction push rod 220 and the suction drive rod 210 and the clamping plate 70 .

[0028] Opening mechanism such as Figure 13 As shown, the opening mechanism includes a release rod 270, a release rod torsion spring 280 and a fixed column 181. The release rod 270 is an injection molded part, having a release rod rotating portion 271, a release rod curved portion 272 and a release rod flat portion 273. The fixed column 181 is a part of the back cover 180 and is used to rotate and fix the release rod rotating portion 271. The release rod curved portion 272 is located on one side of the release rod 270 and is in a mating relationship with the drive nut 50 in the electric actuator mechanism. In the static state, there is a gap between the release rod curved portion 272 and the drive nut 50. When electrically opened, the release rod curved portion 272 is pushed by the drive nut 50, and the release rod 270 rotates around the fixed column 181 to open. The release lever flat portion 273 is located on the opposite side of the release lever curved portion 272 and is in sliding contact with the stop claw operating portion 81. When electrically opened, the release lever flat portion 273 slides and pushes the stop claw operating portion 81, thereby disengaging the engaging portion of the stop claw 80 from the tooth portion of the clamping plate 70.

[0029] like Figure 14 As shown, in a back door lock according to at least one embodiment of the present invention, the helical gear 30 and the lead screw 40 are securely connected via threads 41 on the lead screw 40. The helical gear 30 is encapsulated within the threads 41 of the lead screw 40 through an injection molding process. The threads 41 have a small, concave and convex surface, rather than a smooth surface, to strengthen the connection between the helical gear 30 and the lead screw 40. The threads 41 on the lead screw 40 are typically double-start or triple-start threads.

[0030] like Figure 7 As shown, according to the back door lock of at least one embodiment of the present invention, the electric actuator further includes: The inner ring of the bearing 290 is interference-fitted on the end of the lead screw 40 near the bevel gear 30. The outer ring of the bearing 290 is clamped and fixed by the upper housing 180 and the rear cover. The lead screw 40 rotates with low friction through the inner ring of the bearing 290.

[0031] The shaft sleeve 300 is installed at the end of the lead screw 40 away from the bevel gear 30. The outer ring of the shaft sleeve 300 is clamped and fixed by the upper shell 180 and the rear cover.

[0032] like Figure 15 As shown, according to at least one embodiment of the back door lock of the present invention, the locking mechanism further includes: The locking buffer block 310 is a U-shaped structure and is interference-mounted on the locking bracket 170. The plane of the locking buffer block 310 fits seamlessly with the clamping plate 70 in the fully locked position. The U-shaped arc surface of the locking buffer block 310 contacts a metal shaft.

[0033] The limiting shaft 320 is a metal shaft that contacts the U-shaped arc surface of the locking buffer block 310. The lower end of the limiting shaft 320 is riveted to the base plate. The upper end of the limiting shaft is riveted to the cover plate 90. During the back door locking process, the clamping plate 70 squeezes the locking buffer block 310, and the U-shaped arc surface of the locking buffer block 310 is rigidly limited by the limiting shaft 320, and the locking buffer block 310 can provide greater locking resistance.

[0034] According to at least one embodiment of the back door lock of the present invention, the suction mechanism further includes: The torsion spring 230 of the suction drive rod comprises five parts: leg 1 231, leg 2 232, leg 3 233, spring body 1 234 and spring body 2 235. The spring body is the cylindrical winding part of the torsion spring spirally rising, and the legs are connected to the spring body, which belongs to the torque output end or fixed end of the torsion spring. The leg 1 231 is fixed on the base plate 60 and belongs to the fixed end. The leg 2 232 acts on the spring hanging shaft 260, and the spring hanging shaft 260 is riveted on the suction drive rod 210 and belongs to the torque output end of the torsion spring. The leg 3 233 acts on the bending part 223 of the suction push rod and belongs to the torque output end of the torsion spring. The spring body 1 234 is circumferentially mounted on the outside of the suction drive rod shaft 240, and the spring body 2 235 is circumferentially mounted on the outside of the spring hanging shaft 260. The attraction drive rod torsion spring 230 is a single component, and through the above-mentioned matching relationship, the reset action of the attraction drive rod 210 and the fixed track action of the attraction push rod 220 are achieved.

[0035] According to at least one embodiment of the present invention, the tailgate lock is further equipped with an emergency opening mechanism, which comprises a cylindrical rod 82 that passes through the lock bracket 170 and the cover plate 90 and is exposed outside the cover plate 90. The emergency opening function is achieved by manually pushing the cylindrical rod 82. The cylindrical rod 82 is provided on the locking claw 80 and is the same component.

[0036] According to another aspect of the present invention, a motor vehicle is provided, which includes the above-mentioned tailgate lock.

[0037] It should be understood by those skilled in the art that the above embodiments are merely for the purpose of illustrating the present invention clearly, and are not intended to limit the scope of the present invention. For those skilled in the art, other changes or modifications may be made based on the above disclosure, and such changes or modifications are still within the scope of the present invention.

Claims

1. An electrically closed and opened tailgate lock, comprising an electric actuator, a locking mechanism, a signal feedback system, a closing mechanism, and an opening mechanism; The electric actuator includes a transmission nut slidably adapted on the lead screw, the transmission nut having a signal triggering portion and a power output portion, the signal triggering portion is used to touch the signal feedback system, and the power output portion is used to drive and control the suction mechanism and the opening mechanism; The locking mechanism includes a card plate and a stop claw that are adapted to each other, the card plate having a card plate signal triggering portion for a touch signal feedback system and a card plate operating portion for controlling the suction mechanism, and the stop claw having a stop claw operating portion driven and controlled by an opening mechanism; The signal feedback system includes a first signal component and a second signal component; the first signal component is configured in the locking mechanism and includes switch 1 and switch 2 controlled by the card plate signal trigger unit; the second signal component is configured in the electric actuator and includes switch 3 and switch 4 triggered by the signal trigger unit of the transmission nut; The suction mechanism includes a rotatably mounted suction drive rod and a suction push rod rotatably mounted on the upper surface of the suction drive rod through a suction push rod torsion spring, wherein the suction drive rod has a first limiting surface of the suction drive rod, a second limiting surface of the suction drive rod and a bending surface of the suction drive rod, wherein: The first limiting surface of the suction drive rod is used to contact and limit with the protrusion of the base plate, the second limiting surface of the suction drive rod is used to abut and cooperate with the suction push rod, and the bent surface of the suction drive rod is used to abut and cooperate with the power output part of the transmission nut; the suction push rod comprises a suction push rod fork-shaped portion, a suction push rod protrusion and a suction push rod bent portion, wherein the suction push rod fork-shaped portion is used to abut and cooperate with the card operating portion, the suction push rod protrusion is used to contact and cooperate with the second limiting surface of the suction drive rod, and the suction push rod bent portion is used to hang the suction push rod torsion spring; The opening mechanism includes a rotatably mounted release lever having a release lever curved portion and a release lever flat portion. The release lever curved portion is used to abut against the power output portion of the drive nut, and the release lever flat portion is used to abut against the locking claw operating portion.

2. The electric closing and opening tailgate lock according to claim 1, characterized in that: The electric actuator also includes a motor, a worm and a helical gear. The motor output is connected to the worm, and the helical gear is meshed with the worm for transmission. One end of the lead screw is fixedly connected to the center of the helical gear and is coaxial.

3. The electric closing and opening tailgate lock according to claim 1, characterized in that: When the tailgate lock is electrically opened, the transmission nut moves along the first direction of the screw axis, and its power output part pushes the release rod curved surface of the release rod to drive the opening mechanism to perform the opening action; when the tailgate lock is electrically closed, the transmission nut moves along the second direction of the screw axis, and its power output part pushes the closing drive rod bent surface to control the closing mechanism to perform the closing action.

4. The electrically closed and opened tailgate lock according to claim 1, characterized in that: The card board signal trigger part is an arc surface structure, and the switch one and switch two respectively have a spring part adapted thereto. In the fully locked position, the card board signal trigger part does not press the spring part of switch one, and the signal is disconnected; in the half-locked and open positions, the card board signal trigger part presses the spring part of switch one, and the signal is triggered. Based on this principle, it is identified whether the card board is in the fully locked position; in the fully locked position and the half-locked position, the card board signal trigger part presses the spring part of switch two, and the signal is disconnected; in the open position, the card board signal trigger part does not press the spring part of switch two, and the signal is triggered. Based on this principle, it is identified whether the card board is in the half-locked position.

5. The electric closing and opening tailgate lock according to claim 1, characterized in that: The signal trigger part of the transmission nut is set to a parallel staggered double cam structure; the switch three and switch four are respectively triggered by the signal trigger part of the transmission nut. When in a stationary state, the signal trigger part presses switch three and switch four, and the signal is disconnected; after the electric opening is in place, the signal trigger part of the transmission nut does not press switch three, and the signal is triggered; after the electric attraction is in place, the signal trigger part of the transmission nut does not press switch four, and the signal is triggered; when the electric opening and electric attraction are reset to the position, the signal trigger part of the transmission nut presses switch three and switch four again at the same time, and the feedback vehicle body tailgate lock returns to the initial position.

6. The electrically closed and opened tailgate lock according to claim 1, characterized in that: During the suction process of the back door lock, the suction drive rod rotates around the suction drive rod axis, and the suction push rod protrusion is separated from the second limit surface of the suction drive rod; there are three types of matching relationships between the suction push rod fork-shaped portion and the card plate operating portion; in a static state, there is a gap between the suction push rod fork-shaped portion and the card plate operating portion; in the initial stage of the suction process, one edge of the suction push rod fork-shaped portion is in unilateral contact with the card plate operating portion; as the suction mechanism rotates, the two edges of the suction push rod fork-shaped portion are in bilateral contact with the card plate operating portion, and the bilateral contact point changes with the rotation angle of the suction mechanism.

7. The electrically closed and opened tailgate lock according to claim 1, characterized in that: The bent portion of the suction push rod is in sliding contact with one leg of the suction push rod torsion spring, and the torsion spring torque acts on the bent portion of the suction push rod to realize the four-bar linkage motion between the suction push rod, the suction drive rod and the clamping plate.

8. The electrically closed and opened tailgate lock according to claim 1, characterized in that: The release lever is an injection molded part and is rotatably mounted on the fixing column of the rear cover through the release lever rotating portion.

9. The electrically closed and opened tailgate lock according to claim 1, characterized in that: The helical gear and the lead screw are fixedly connected via a threaded structure on the lead screw, and the helical gear is wrapped in the threaded area of ​​the lead screw through an injection molding process; the surface of the thread is provided with a concave and convex small tooth structure, and the thread is a double-start thread or a triple-start thread.

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