Electrically attracted, electrically opened back door lock

Abstract

This utility model relates to an electrically operated and electrically unlocked rear door lock, belonging to the technical field of automotive door lock structures. An electrically operated and electrically unlocked rear door lock includes an electric actuator, a locking mechanism, a signal feedback system, an engaging mechanism, and an unlocking mechanism. The actuator transmission mechanism of this utility model uses two switches, achieving high reliability through closed-loop control and supporting dynamic torque control. The engaging motor, releasing motor, electric actuator, locking mechanism, engaging mechanism, and signal feedback system are highly integrated into a compact and lightweight lock body module. The wiring harness connection between the switches and terminals reduces complexity and improves reliability. A "single-motor dual-function" mechanism has been developed, using a single motor and ingenious mechanical design to achieve both engaging / locking and unlocking / releasing actions, significantly reducing cost, weight, and size.

Description

Technical Field

[0001] This utility model relates to an electrically operated and electrically unlocked rear door lock, belonging to the technical field of automotive door lock structure. Background Technology

[0002] With technological advancements and societal progress, the application of electrically operated and electrically closed car doors is becoming increasingly widespread. Consequently, the tailgate (rear door / trunk) of motor vehicles has begun to adopt tailgate locks with electrically operated opening and closing functions.

[0003] Traditional electric magnetic locks have the following main drawbacks:

[0004] 1. Generally, these rear door locks are equipped with a drive motor and three position switches. The lock is unlocked and locked by the forward and reverse rotation of the drive motor. The three switches identify the open, half-locked, and fully locked positions of the rear door, as well as the position of the actuator transmission mechanism. However, traditional rear door locks typically only use one switch for the actuator transmission mechanism, which can only identify the initial position and cannot fully identify the specific and final positions of electrical engagement or release. This results in low tolerance for component tolerances, aging, and environmental changes (such as increased lubricant viscosity at low temperatures). If the actual travel is insufficient due to increased resistance, mechanical wear, or low temperature, it may cause a "false lock" (not locked); if the resistance decreases, it may cause "over-engagement" (excessive tension, damaging the mechanism).

[0005] 2. Traditional electric magnetic locks are heavy, bulky, and have complex internal structures (generally containing two motors, one for electric engagement and one for electric unlocking; complex mechanical structures such as gears, cables, and linkages), resulting in too many mechanical failures.

[0006] 3. In order to ensure sufficient suction power, traditional electric magnetic locks use most of their internal transmission parts in metal, resulting in redundant design and making them uncompetitive in terms of weight, size, and cost. Utility Model Content

[0007] The present invention aims to solve the various problems mentioned above, and thereby provide an electrically operated and electrically opened back door lock.

[0008] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0009] An electrically operated and electrically unlocked back door lock includes an electric actuator, a locking mechanism, a signal feedback system, an engaging mechanism, and an unlocking mechanism;

[0010] The electric actuator includes a transmission nut that slides onto the lead screw. The transmission nut has a signal triggering part and a power output part. The signal triggering part is used to touch the signal feedback system, and the power output part is used to drive and control the engaging mechanism and the opening mechanism.

[0011] The locking mechanism includes a locking plate and a stop pawl that are adapted to each other. The locking plate has a locking plate signal triggering part for a touch signal feedback system and a locking plate operating part for controlling the suction mechanism. The stop pawl has a stop pawl operating part that is driven and controlled by the opening mechanism.

[0012] The signal feedback system includes a first signal component and a second signal component; the first signal component is disposed in the locking mechanism and includes switch one and switch two controlled by the card plate signal triggering part; the second signal component is disposed in the electric actuator and includes switch three and switch four touched by the signal triggering part of the transmission nut;

[0013] 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 via a suction push rod torsion spring. The suction drive rod has a first limiting surface, a second limiting surface, and a bending surface. The first limiting surface is used to contact and limit the protrusion of the substrate, the second limiting surface is used to abut against the suction push rod, and the bending surface is used to abut against the power output part of the transmission nut. The suction push rod has a fork-shaped part, a protrusion, and a bending part. The fork-shaped part abuts against the clamping plate operating part, the protrusion contacts the second limiting surface, and the bending part is used to attach the suction push rod torsion spring.

[0014] The opening mechanism includes a rotatably mounted release rod, which has a curved release rod portion and a flat release rod portion. The curved release rod portion is used to abut against the power output portion of the transmission nut, and the flat release rod portion is used to abut against the operating portion of the stop pawl.

[0015] Furthermore, the electric actuator also includes a motor, a worm gear, and a helical gear. The motor output is connected to the worm gear, and the helical gear meshes with the worm gear for transmission. One end of the lead screw is fixedly connected to the center of the helical gear and is coaxial.

[0016] Furthermore, when the tailgate lock is electrically opened, the transmission nut moves along the first direction of the lead 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 engaged, the transmission nut moves along the second direction of the lead screw axis, and its power output part pushes the engagement drive rod bending surface to control the engagement mechanism to perform the engagement action.

[0017] Furthermore, the card plate signal triggering part has an arc-shaped structure, and the first switch and the second switch each have a spring portion adapted to it. In the fully locked position, the card plate signal triggering part does not press the spring portion of the first switch, and the signal is disconnected; in the half-locked and open positions, the card plate signal triggering part presses the spring portion of the first switch, and the signal is triggered, thus identifying whether the card plate is in the fully locked position; in the fully locked and half-locked positions, the card plate signal triggering part presses the spring portion of the second switch, and the signal is disconnected; in the open position, the card plate signal triggering part does not press the spring portion of the second switch, and the signal is triggered, thus identifying whether the card plate is in the half-locked position.

[0018] Furthermore, the signal triggering part of the transmission nut is configured as a parallel offset double cam structure; switches three and four are respectively triggered by the signal triggering part of the transmission nut. In the stationary state, the signal triggering part presses switches three and 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 closing 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 closing are reset, the signal triggering part of the transmission nut presses switches three and four simultaneously again, and the feedback is that the vehicle body rear door lock returns to the initial position.

[0019] Furthermore, during the closing process of the back door lock, the closing drive rod rotates around the closing drive rod axis, and the protruding part of the closing push rod separates from the second limiting surface of the closing drive rod; the fork-shaped part of the closing push rod and the locking plate operating part have three kinds of cooperation relationships; in the static state, there is a gap between the fork-shaped part of the closing push rod and the locking plate operating part; in the initial stage of the closing process, one side of the fork-shaped part of the closing push rod is in single-sided contact with the locking plate operating part; as the closing mechanism rotates, both sides of the fork-shaped part of the closing push rod are in double-sided contact with the locking plate operating part, and the double-sided contact point changes with the rotation angle of the closing mechanism.

[0020] Furthermore, the bent portion of the suction push rod slides in contact with one leg of the suction push rod torsion spring, and the torque of the torsion spring acts on the bent portion of the suction push rod, realizing the four-bar linkage between the suction push rod, the suction drive rod, and the locking plate.

[0021] Furthermore, the release rod is an injection-molded part, which is rotatably mounted on the fixing post of the rear cover via the release rod rotating part.

[0022] Furthermore, the helical gear and the lead screw are fixedly connected by the threaded structure on the lead screw, and the helical gear is wrapped in the threaded area of ​​the lead screw by injection molding; the surface of the thread is provided with a small tooth profile structure with concave and convex shapes, and the thread is a double-start thread or a triple-start thread.

[0023] The main technological innovations of this utility model regarding an electrically operated and electrically unlocked back door lock, compared to traditional back locks, are as follows:

[0024] 1. The actuator transmission mechanism employs two switches, ensuring high reliability of closed-loop control: accurately sensing the start and end points to avoid under-locking and over-locking issues. It supports dynamic torque control: combined with current detection, it can reduce speed / force as it approaches the end point, minimizing impact and noise (e.g., buffering at the end of electric engagement).

[0025] 2. High Integration and Modularization: The locking motor, release motor, electric actuator, locking mechanism, and signal feedback system are highly integrated into a compact and lightweight lock body module. Complexity is reduced and reliability is improved through wiring harness connections between switches and terminals. A "single-motor dual-function" mechanism has been developed, using a single motor and ingenious mechanical design to achieve both locking and unlocking actions, significantly reducing cost, weight, and size.

[0026] 3. Lightweight Gear and Lead Screw: Because the helical gear and lead screw are an integrated structure, high-strength engineering plastics are used to replace traditional metal parts to reduce the overall weight while ensuring sufficient strength. The gear and lead screw are fixed together by a threaded structure, achieving sufficient holding strength between them. Attached Figure Description

[0027] The accompanying drawings illustrate exemplary embodiments of the present invention and, together with their description, serve to explain the principles of the present invention and enhance further understanding of it. The drawings are included in and constitute a part of this specification.

[0028] Figure 1 : A schematic diagram of the external shape of an electrically operated and electrically opened back door lock according to this utility model;

[0029] Figure 2 This utility model discloses a schematic diagram of the structure of an electric actuator for an electrically operated and electrically opened rear door lock.

[0030] Figure 3 This utility model discloses a structural schematic diagram of a locking mechanism for removing the cover plate of an electrically operated and electrically opened rear door lock.

[0031] Figure 4 This utility model discloses a schematic diagram of a fully locked position switch 1 and a fully locked position switch 2 for an electrically operated and electrically unlocked back door lock.

[0032] Figure 5 This utility model discloses a schematic diagram of a half-lock position switch 1 and a second switch for an electrically operated and electrically opened back door lock.

[0033] Figure 6 This utility model discloses a fully open position switch 1 and a fully open switch 2 for an electrically operated and electrically operated back door lock.

[0034] Figure 7This utility model discloses a schematic diagram of the middle position of an electric actuator for an electrically operated and electrically opened rear door lock.

[0035] Figure 8 This utility model discloses a schematic diagram of an electric actuator for an electrically operated and electrically opened rear door lock, showing the mechanism in the open position.

[0036] Figure 9 This utility model discloses a schematic diagram of an electric actuator for an electrically operated and electrically opened rear door lock being engaged in position.

[0037] Figure 10 : A schematic diagram of an electric suction and electric opening back door lock suction mechanism of this utility model;

[0038] Figure 11 This utility model provides a schematic diagram of a single-sided contact between the electric suction and opening push rod of an electric suction and opening rear door lock and the operating part of the card plate.

[0039] Figure 12 This utility model provides a schematic diagram of the bilateral contact between the electric suction and opening back door lock suction push rod and the card plate operation part;

[0040] Figure 13 This utility model discloses a schematic diagram of an electric suction and electric opening mechanism for a back door lock.

[0041] Figure 14 This utility model relates to a schematic diagram of the screw thread of an electrically operated and electrically opened tailgate lock.

[0042] Figure 15 : A schematic diagram of an electric latching and electric opening back door lock overlock buffer block according to this utility model;

[0043] Figure 16 This utility model discloses a torsion spring for an electric suction and electric opening rear door lock suction drive rod.

[0044] In the diagram, 10 is the motor, 20 is the worm gear, 30 is the helical gear, 40 is the lead screw, 41 is the thread, 50 is the transmission nut, 51 is the internal thread part, 52 is the power output part, 53 is the signal trigger part, 60 is the base plate, 70 is the locking plate, 71 is the locking plate operating part, 72 is the locking plate signal trigger part, 80 is the stop pawl, 81 is the stop pawl operating part, 82 is the cylindrical rod, 90 is the cover plate, 100 is the pin, 110 is the switch one, 111 is the spring part, 120 is the switch two, 130 is the switch three, 140 is the switch four, 150 is the switch base one, 160 is the switch base two, 170 is the lock bracket, 180 is the upper housing, 181 is the fixing post, 190 is the wiring harness, 200 is the terminal, 210 is the suction drive rod, and 211 is the locking bracket. 212. First limiting surface of the attraction drive rod; 213. Second limiting surface of the attraction drive rod; 220. Bending surface of the attraction drive rod; 221. Attraction push rod; 222. Protrusion of the attraction push rod; 223. Fork-shaped part of the attraction push rod; 224. Bending part of the attraction push rod; 235. Torsion spring of the attraction push rod; 236. Support leg one; 237. Support leg two; 238. Spring body one; 290. Spring body two; 200. Shaft of the attraction drive rod; 201. Shaft of the attraction push rod; 212. Spring hanging shaft; 213. Release rod; 224. Rotating part of the release rod; 275. Curved part of the release rod; 276. Flat part of the release rod; 277. Torsion spring of the release rod; 278. Bearing; 300. Bushing; 310. Overlock buffer block; 320. Limiting shaft. Detailed Implementation

[0045] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be noted that, for ease of description, only the parts relevant to the present invention are shown in the accompanying drawings.

[0046] It should be noted that, where there is no conflict, the embodiments and features described in these embodiments can be combined with each other. The technical solution of this utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0047] Unless otherwise stated, the exemplary embodiments / exemplifications shown are to be understood as providing exemplary features of various details of ways in which the technical concept of this utility model can be implemented in practice. Therefore, unless otherwise stated, the features of various embodiments / exemplifications may be additionally combined, separated, interchanged and / or rearranged without departing from the technical concept of this utility model.

[0048] This utility model aims to provide an electrically operated and electrically unlocked rear door lock that features accurate signal prompts, low cost, and small size. According to one aspect of this utility model, an electrically operated and electrically unlocked rear door lock is provided, comprising:

[0049] Electric actuators, such as Figure 2 As shown, the electric actuator includes a motor 10, a worm gear 20, a helical gear 30, a lead screw 40, and a transmission nut 50. The worm gear 20 is a metal part rotatably mounted on the output shaft of the motor 10 and fixedly connected to the motor shaft. The helical gear 30 is an injection-molded part driven to rotate by the worm gear 20, thus transmitting torque. The lead screw 40 is a metal part whose rotation axis is the same as the rotation axis of the helical gear 30, and this axis is perpendicular to the rotation axis of the worm gear 20. The transmission nut 50 has an internal thread portion 51, a power output portion 52, and a signal trigger portion 53. The internal thread portion 51 of the transmission nut 50 is axially driven by the lead screw 40, enabling the transmission nut 50 to move linearly along the lead screw axis in a first or second direction. The power output part 52 of the transmission nut 50 is located below the internal thread and is a cylindrical structure. When the tailgate lock is electrically opened, the transmission nut 50 moves along the first direction of the lead screw axis, and its power output part 52 pushes the release rod curved surface 272 of the release rod 270. When the tailgate lock is electrically engaged, the transmission nut 50 moves along the second direction of the lead screw axis, and its power output part 52 pushes the engagement drive rod bending surface 213. The signal trigger part 53 of the transmission nut 50 is located above the internal thread part 51 and has a parallel offset double cam structure. The signal trigger part 53 of the transmission nut 50 needs to trigger switches three 130 and four 140. Because the transmission nut 50 has a long stroke, in this embodiment, switches three 130 and four 140 are arranged on different planes, i.e., they are arranged in a staggered parallel arrangement. Correspondingly, the cams of the signal trigger part 53 used to trigger switches three 130 and four 140 are also parallel offset structures.

[0050] Locking mechanism, such as Figure 3 As shown, the locking mechanism includes components such as a base plate 60, a locking plate 70, a stop pawl 80, a cover plate 90, and a pin 100. The locking plate 70 is rotatably mounted on the base plate 60 and linked to the vehicle door. The stop pawl 80 is also rotatably mounted on the base plate 60 and has an engaging portion that abuts against the teeth of the locking plate, holding the rear door lock in a fully locked or half-locked position. The locking plate 70 also includes a locking plate operating portion 71 and a locking plate signal trigger portion 72, and the stop pawl 80 includes a stop pawl operating portion 81.

[0051] The signal feedback system includes switch one 110, switch two 120, switch three 130, switch four 140, switch base one 150, switch base two 160, lock bracket 170, upper housing 180, wiring harness 190, terminal 200, etc. For example... Figure 4As shown, after being welded to the wiring harness 190, switches 110 and 120 are installed in switch holders 150 and 160, respectively. Then, the switches, wiring harness, and switch holders are installed together onto the lock bracket 170. This series of parts is placed within the locking mechanism. Switches 110 and 120 each have a spring-loaded portion 111. In the fully locked position, the latch signal triggering part 72 does not press the spring-loaded portion 111 of switch 110, and the signal is disconnected. In the half-locked and open positions, the latch signal triggering part 72 presses the spring-loaded portion 111 of switch 110, triggering the signal. This principle is used to identify whether the latch 70 is in the fully locked position and to provide a corresponding position signal to the vehicle body. In the fully locked and partially locked positions, the card plate signal triggering unit 72 presses the spring portion 121 of switch two 120, and the signal is disconnected; in the open position, the card plate signal triggering unit 72 does not press the spring portion 121 of switch two 120, and the signal is triggered. This principle is used to identify whether the card plate 70 is in the partially locked position, providing a signal to the vehicle body to control the motor 10 to engage; alternatively, it can identify when the motor is fully open, providing a signal to the vehicle body to control the motor 10 to de-energize. Figure 7 As shown, after switches 130 and 140 are installed on the upper housing 180, they are welded to the terminal 200. This series of parts is placed in the electric actuator. Switches 130 and 140 are triggered by the signal triggering part 53 of the transmission nut 50. In the stationary state, the signal triggering part 53 presses down on switches 130 and 140, and the signal is disconnected. After the electric actuator is in the correct position, as... Figure 8 As shown, after the transmission nut 50 is opened to the first position, the signal triggering part 53 of the transmission nut 50 does not press the switch 130, and the signal is triggered. After the electric engagement is completed, as shown... Figure 9 As shown, after the transmission nut 50 is engaged in the second direction, the signal triggering part 53 of the transmission nut 50 does not press switch 4 140, and the signal is triggered. When the electric opening and electric engagement reset are in place, the signal triggering part 53 of the transmission nut 50 simultaneously presses switch 3 130 and switch 4 140 again, and the feedback indicates that the vehicle body rear door lock has returned to the initial position.

[0052] Suction mechanism such as Figure 10As shown, the suction mechanism includes components such as a suction drive rod 210, a suction push rod 220, a clamping plate operating part 71, a suction push rod torsion spring 230, a suction drive rod shaft 240, a suction push rod shaft 250, and a spring hanging shaft 260. The suction drive rod 210 is rotatably mounted on the substrate 60 via the suction drive rod shaft 240, and has a first limiting surface 211, a second limiting surface 212, and a bending surface 213. In a stationary state, the first limiting surface 211 contacts and limits contact with a protrusion on the substrate. 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 fork-shaped portion 222, and a bending portion 223. In a stationary state, the suction push rod protrusion 221 contacts the second limiting surface 212 of the suction drive rod. During the closing process of the back 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. The closing push rod fork-shaped portion 222 and the locking plate operating portion 71 have three possible engagement relationships. In the stationary state, there is a gap between the closing push rod fork-shaped portion 222 and the locking plate operating portion 71; in the initial stage of the closing process, one side of the closing push rod fork-shaped portion 222 contacts the locking plate operating portion 71 on one side; as the closing mechanism rotates, both sides of the closing push rod fork-shaped portion 222 contact the locking plate operating portion 71 on both sides. The contact point on both sides changes with the rotation angle of the closing mechanism. The bending portion 223 of the suction push rod slides in contact with one leg of the torsion spring 230 of the suction push rod. The torque of the torsion spring acts on the bending portion 223 of the suction push rod, realizing the four-bar linkage between the suction push rod 220, the suction drive rod 210, and the clamping plate 70.

[0053] Opening mechanism such as Figure 13 As shown, the opening mechanism includes a release rod 270, a release rod torsion spring 280, and a fixing post 181. The release rod 270 is an injection-molded part with a release rod rotating portion 271, a release rod curved portion 272, and a release rod flat portion 273. The fixing post 181 is part of the rear cover 180 and is used to rotatably fix the release rod rotating portion 271. The release rod curved portion 272 is located on one side of the release rod 270 and has a mating relationship with the transmission nut 50 in the electric actuator mechanism. In the stationary state, there is a gap between the release rod curved portion 272 and the transmission nut 50. When electrically opened, the release rod curved portion 272 is pushed by the transmission nut 50, and the release rod 270 rotates around the fixing post 181 to open. The flat part 273 of the release rod is located on the opposite side of the curved part 272 of the release rod and slides in contact with the stop pawl operating part 81. When the motor is opened, the flat part 273 of the release rod slides and pushes the stop pawl operating part 81, so that the engagement part of the stop pawl 80 disengages from the teeth of the clamping plate 70.

[0054] like Figure 14 As shown, in at least one embodiment of the rear door lock of this utility model, the helical gear 30 and the lead screw 40 are fixedly connected by a thread 41 on the lead screw 40, and the helical gear 30 is wrapped in the thread 41 area of ​​the lead screw 40 by injection molding. The surface of the thread 41 is provided with a small tooth profile structure with concave and convex shapes, and is not a smooth plane, to enhance the connection strength between the helical gear 30 and the lead screw 40. The thread 41 on the lead screw 40 is usually a double-start thread or a triple-start thread.

[0055] like Figure 7 As shown, in at least one embodiment of the rear door lock according to this utility model, the electric actuator further includes:

[0056] Bearing 290 has its inner ring interference-fitted onto the end of the lead screw 40 near the helical gear 30. The outer ring of bearing 290 is clamped and fixed by the upper housing 180 and the rear cover. The lead screw 40 achieves low-friction rotation via the inner ring of bearing 290.

[0057] A bushing 300 is installed at the end of the lead screw 40 away from the helical gear 30. The outer ring of the bushing 300 is clamped and fixed by the upper housing 180 and the rear cover.

[0058] like Figure 15 As shown, according to at least one embodiment of the back door lock of this utility model, the locking mechanism further includes:

[0059] An overlock buffer block 310, which has a U-shaped structure, is interference-fitted onto the lock bracket 170. The flat surface of the overlock buffer block 310 fits snugly against the locking plate 70 without gap in the fully locked position. The U-shaped arc surface of the overlock buffer block 310 contacts a metal shaft.

[0060] A limiting shaft 320, a metal shaft, contacts the U-shaped arc surface of the overlock 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 overlocking process of the back door, the locking plate 70 presses against the overlock buffer block 310, and the U-shaped arc surface of the overlock buffer block 310 is rigidly limited by the limiting shaft 320, providing a large overlocking resistance.

[0061] According to at least one embodiment of the back door lock of this utility model, the suction mechanism further includes:

[0062] The attraction drive rod torsion spring 230 comprises five parts: a first support leg 231, a second support leg 232, a third support leg 233, a first spring body 234, and a second spring body 235. The spring body is a spirally wound cylindrical portion of the torsion spring. The supports are connected to the spring body and serve as either the torsion spring torque output end or the fixed end. The first support leg 231 is fixed to the base plate 60 and serves as the fixed end. The second support leg 232 acts on the spring hanger 260, which is riveted to the attraction drive rod 210 and serves as the torsion spring torque output end. The third support leg 233 acts on the bent portion 223 of the attraction push rod and also serves as the torsion spring torque output end. The first spring body 234 is circumferentially mounted on the outside of the attraction drive rod shaft 240, and the second spring body 235 is circumferentially mounted on the outside of the spring hanger 260. The torsion spring 230 of the attraction drive rod is a single component. Through the above-mentioned mating relationship, the reset action of the attraction drive rod 210 and the fixed trajectory action of the attraction push rod 220 are realized.

[0063] According to at least one embodiment of the rear door lock of this utility model, an emergency opening mechanism is also provided. This mechanism is a cylindrical rod 82 that passes through the lock bracket 170 and the cover plate 90, and protrudes outside the cover plate 90. The emergency opening function is achieved by manually pushing the cylindrical rod 82. The cylindrical rod 82 is mounted on the stop pawl 80 and is a single part.

[0064] According to another aspect of the present invention, a motor vehicle is also provided, which includes the aforementioned rear door lock.

[0065] Those skilled in the art should understand that the above embodiments are merely for clearly illustrating the present invention and are not intended to limit the scope of the present invention. Those skilled in the art can make other changes or modifications based on the above disclosure, and these changes or modifications still fall within the scope of the present invention.

Claims

1. An electrically engaging and electrically opening rear door lock, comprising an electric actuator, a locking mechanism, a signal feedback system, an engaging mechanism, and an opening mechanism; The electric actuator includes a transmission nut that slides onto the lead screw. The transmission nut has a signal triggering part and a power output part. The signal triggering part is used to touch the signal feedback system, and the power output part is used to drive and control the engaging mechanism and the opening mechanism. The locking mechanism includes a locking plate and a stop pawl that are adapted to each other. The locking plate has a locking plate signal triggering part for a touch signal feedback system and a locking plate operating part for controlling the suction mechanism. The stop pawl has a stop pawl operating part that is driven and controlled by the opening mechanism. The signal feedback system includes a first signal component and a second signal component; the first signal component is disposed in the locking mechanism and includes switch one and switch two controlled by the card plate signal triggering part; the second signal component is disposed in the electric actuator and includes switch three and switch four touched by the signal triggering part of the transmission nut; The suction mechanism comprises a rotationally 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 torsional spring, the suction drive rod has a suction drive rod first limiting surface, a suction drive rod second limiting surface and a suction drive rod bending surface, wherein, The first limiting surface of the suction drive rod is used to contact and limit the protrusion of the substrate, the second limiting surface of the suction drive rod is used to abut against the suction push rod, and the bent surface of the suction drive rod is used to abut against the power output part of the transmission nut; the suction push rod has a suction push rod fork-shaped part, a suction push rod protrusion part, and a suction push rod bent part, wherein the suction push rod fork-shaped part is used to abut against the clamping plate operating part, the suction push rod protrusion part is used to contact and cooperate with the second limiting surface of the suction drive rod, and the suction push rod bent part is used to hook the suction push rod torsion spring; The opening mechanism includes a rotatably mounted release rod, which has a curved release rod portion and a flat release rod portion. The curved release rod portion is used to abut against the power output portion of the transmission nut, and the flat release rod portion is used to abut against the operating portion of the stop pawl.

2. The electrically engaging and electrically opening back door lock as described in claim 1, characterized in that, The electric actuator also includes a motor, a worm gear, and a helical gear. The motor output is connected to the worm gear, and the helical gear meshes with the worm gear for transmission. One end of the lead screw is fixedly connected to the center of the helical gear and is coaxial.

3. The electrically engaging and electrically opening rear door lock as described in claim 1, characterized in that, When the tailgate lock is electrically opened, the transmission nut moves along the first direction of the lead 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 engaged, the transmission nut moves along the second direction of the lead screw axis, and its power output part pushes the engagement drive rod bending surface to control the engagement mechanism to perform the engagement action.

4. The electrically engaging and electrically opening rear door lock as described in claim 1, characterized in that, The card plate signal triggering part has an arc-shaped structure. Switch 1 and switch 2 each have a corresponding spring part. In the fully locked position, the card plate signal triggering part does not press the spring part of switch 1, and the signal is disconnected. In the half-locked and open positions, the card plate signal triggering part presses the spring part of switch 1, and the signal is triggered. This principle is used to identify whether the card plate is in the fully locked position. In the fully locked and half-locked positions, the card plate signal triggering part presses the spring part of switch 2, and the signal is disconnected. In the open position, the card plate signal triggering part does not press the spring part of switch 2, and the signal is triggered. This principle is used to identify whether the card plate is in the half-locked position.

5. The electrically engaging and electrically opening rear door lock as described in claim 1, characterized in that, The signal triggering part of the transmission nut is configured with a parallel offset double cam structure; switches three and four are triggered by the signal triggering part of the transmission nut respectively. In the stationary state, when the signal triggering part presses switches three and four, the signal is disconnected; after the electric opening is completed, the signal triggering part of the transmission nut does not press switch three, and the signal is triggered; after the electric closing is completed, the signal triggering part of the transmission nut does not press switch four, and the signal is triggered; when the electric opening and electric closing are completed, the signal triggering part of the transmission nut presses switches three and four simultaneously again, and the feedback indicates that the vehicle body rear door lock has returned to its initial position.

6. The electrically engaging and electrically opening rear door lock as described in claim 1, characterized in that, During the closing process of the back door lock, the closing drive rod rotates around the closing drive rod axis, and the protruding part of the closing push rod separates from the second limiting surface of the closing drive rod; the fork-shaped part of the closing push rod and the locking plate operating part have three kinds of cooperation relationships; in the stationary state, there is a gap between the fork-shaped part of the closing push rod and the locking plate operating part; in the initial stage of the closing process, one side of the fork-shaped part of the closing push rod is in single-sided contact with the locking plate operating part; as the closing mechanism rotates, both sides of the fork-shaped part of the closing push rod are in double-sided contact with the locking plate operating part, and the double-sided contact point changes with the rotation angle of the closing mechanism.

7. The electrically engaging and electrically opening rear door lock as described in claim 1, characterized in that, The bent part of the suction push rod slides in contact with one leg of the suction push rod torsion spring. The torque of the torsion spring acts on the bent part of the suction push rod, realizing the four-bar linkage between the suction push rod, the suction drive rod, and the clamping plate.

8. The electrically engaging and electrically opening back door lock as described in claim 1, characterized in that, The release rod is an injection-molded part, which is rotatably mounted on the fixing post of the rear cover via the release rod rotating part.

9. The electrically engaging and electrically opening rear door lock as described in claim 1, characterized in that, The helical gear and the lead screw are fixedly connected by the threaded structure on the lead screw. The helical gear is wrapped in the threaded area of ​​the lead screw by injection molding. The surface of the thread is provided with small tooth profile structure with concave and convex shapes. The thread is a double-start thread or a triple-start thread.

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