Electric self-absorption tail door lock

Abstract

According to the technical scheme, the electric self-absorption tail door lock is characterized in that the electric self-absorption tail door lock comprises a bottom plate, a cover plate, a motor, a worm assembly, an unlocking assembly, a microswitch assembly, a lock body assembly and a transmission assembly, the motor is connected with the worm assembly, and the unlocking assembly and the transmission assembly are both connected with the worm assembly; the transmission assembly and the unlocking assembly are both connected with the lock body assembly, the lock body assembly comprises a pawl assembly, a pawl spring, a ratchet wheel assembly and a ratchet wheel spring, the two ends of the pawl spring are fixedly connected with the bottom plate and the pawl assembly respectively, and the two ends of the ratchet wheel spring are fixedly connected with the bottom plate and the ratchet wheel assembly respectively. The pawl assembly abuts against the ratchet wheel assembly, the pawl assembly is connected with the unlocking assembly, the ratchet wheel assembly is connected with the transmission assembly, the pawl assembly and the ratchet wheel assembly are both connected with the microswitch assembly, a semi-locking state is added between an unlocking state and a locking state of the device, the overall size is reduced, and the device is safer.

Description

TECHNICAL FIELD

[0001] The utility model relates to a door lock more specifically, it relates to a kind of electric self-suction tail door lock. BACKGROUND

[0002] Electric tail door lock is a kind of automobile tail door closing device, and the locking and unlocking of tail door are realized by motor driving, its main function is to simplify tail door closing operation, improve use convenience and vehicle technology, it is generally installed in automobile tail door, can lock automobile tail door and realize opening by its internal structure, it is a very important vehicle body accessory, with safety protection function, both guarantee the reliable locking of vehicle door in normal use, and prevent accidental opening, also guarantee the smooth opening of vehicle door when needing to open, although there is self-suction structure in prior art in tail door lock, but in actual use, it is found that self-suction structure usually belongs to additional structure, resulting in the volume of overall tail door lock is large, and directly affect the switching of unlocking state and locking state, inconvenient to use, therefore a kind of electric self-suction tail door lock is required, the device adds half-lock state between unlocking state and locking state, reduces overall volume and is safer.

[0003] In view of the above reasons, how to add a half-lock state between the unlocking state and the locking state is the problem considered by the present application. SUMMARY

[0004] In view of the deficiencies in the prior art, an electric self-suction tail door lock is provided, which adds a half-lock state between the unlocking state and the locking state, reduces the overall volume and is safer.

[0005] To achieve the above purpose, the following technical scheme is provided: an electric self-suction tail door lock, characterized in that it comprises a bottom plate, a cover plate, a motor, a worm assembly, an unlocking assembly, a microswitch assembly, a lock body assembly and a transmission assembly, the bottom plate and the cover plate are fixedly connected and form a frame, the motor, the worm assembly, the lock body assembly and the transmission assembly are all installed in the frame, the worm assembly and the unlocking assembly are installed on the two sides outside the frame, the motor is connected with the worm assembly, the unlocking assembly and the transmission assembly are both connected with the worm assembly, the transmission assembly and the unlocking assembly are both connected with the lock body assembly, and the unlocking assembly and the lock body assembly are both connected with the microswitch assembly.

[0006] The lock body assembly comprises a pawl assembly, a pawl spring, a ratchet assembly and a ratchet spring, the two ends of the pawl spring are fixedly connected with the bottom plate and the pawl assembly respectively, the two ends of the ratchet spring are fixedly connected with the bottom plate and the ratchet assembly respectively, the pawl assembly abuts against the ratchet assembly, the pawl assembly is connected with the unlocking assembly, the ratchet assembly is connected with the transmission assembly, and the pawl assembly and the ratchet assembly are both connected with the microswitch assembly.

[0007] When the unlocking assembly drives the ratchet pawl assembly, the ratchet pawl assembly is separated from the micro switch assembly, the unlocking assembly drives the micro switch assembly to output an unlocking signal, the ratchet pawl assembly is separated from the ratchet wheel assembly, the ratchet wheel spring drives the ratchet wheel assembly to be unlocked, the ratchet wheel assembly drives the micro switch assembly to output an unlocking signal, and the motor is turned off.

[0008] When the ratchet wheel assembly is partially separated from the micro switch assembly, the micro switch assembly outputs an unlocking signal and a locking signal, the motor is started, and the motor drives the ratchet wheel assembly to be locked through the worm assembly and the transmission assembly in sequence.

[0009] When the ratchet wheel assembly is completely separated from the micro switch assembly, the micro switch assembly outputs a locking signal, and the motor is turned off.

[0010] In summary, the technical scheme has the following beneficial effects: compared with the traditional tail door lock without self-suction, the tail door lock is safer, the whole lock is small in size, the size is 124mm*98mm*70mm, the tail door lock is convenient to arrange in a narrow space of a vehicle body, the vehicle body is better to realize light weight, the unlocking and locking self-suction are controlled by the ECU of the whole vehicle, and the intelligentization is more convenient to realize. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is an internal three-dimensional structure diagram of one side of a worm assembly in the electric self-suction tail door lock.

[0012] Figure 2 It is an internal three-dimensional structure diagram of one side of a lock body assembly in the utility model.

[0013] Figure 3 It is a three-dimensional structure diagram of one side of a worm assembly in the utility model.

[0014] Figure 4 It is a three-dimensional structure diagram of a bottom in the utility model.

[0015] The drawings show that: 1, a bottom plate; 2, a cover plate; 3, a motor; 4, a worm assembly; 5, an unlocking assembly; 6, a micro switch assembly; 7, a lock body assembly; 8, a transmission assembly;

[0016] 41, a first worm; 42, a first turbine; 43, a second worm; 44, a second turbine; 45, a threaded rod;

[0017] 51, an unlocking half tooth; 52, an unlocking tab group; 53, an unlocking connecting rod; 54, an unlocking spring;

[0018] 61, a first micro switch; 62, a second micro switch; 63, a tab spring; 64, a micro switch tab; 65, a contact piece; 66, a second groove;

[0019] 71, pawl assembly; 72, pawl spring; 73, ratchet assembly; 74, ratchet spring; 75, first unlock handle; 76, second unlock handle; 77, unlock handle spring;

[0020] 711, first groove;

[0021] 81, transmission nut; 82, lock plate; 83, crank link assembly; 84, lock spring. DETAILED DESCRIPTION

[0022] The utility model is further explained in detail below in combination with the drawings and embodiments. Identical parts are indicated by identical reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" in the following description refer to the directions in the drawings, and the words "bottom surface" and "top surface", "inner" and "outer" refer to the directions towards or away from the geometric center of a particular part.

[0023] Referring to Figures 1-4 As shown in the drawings, an electric self-suction tail gate lock comprises a bottom plate 1, a cover plate 2, a motor 3, a worm assembly 4, an unlocking assembly 5, a micro switch assembly 6, a lock body assembly 7 and a transmission assembly 8. The bottom plate 1 and the cover plate 2 are fixedly connected and form a frame. The motor 3, the worm assembly 4, the lock body assembly 7 and the transmission assembly 8 are all installed in the frame. The worm assembly 4 and the unlocking assembly 5 are installed on the two sides outside the frame. The motor 3 is connected with the worm assembly 4. The unlocking assembly 5 and the transmission assembly 8 are both connected with the worm assembly 4. The transmission assembly 8 and the unlocking assembly 5 are both connected with the lock body assembly 7. The unlocking assembly 5 and the lock body assembly 7 are both connected with the micro switch assembly 6.

[0024] Further, the micro switch assembly 6 comprises a first micro switch 61, a second micro switch 62, a lever spring 63 and a micro switch lever 64. The unlocking assembly 5 and the lock body assembly 7 are both connected with the micro switch lever 64. The first micro switch 61 is connected with the micro switch lever 64. The second micro switch 62 is connected with the lock body assembly 7. The two ends of the lever spring 63 are fixedly connected with the bottom plate 1 and the micro switch lever 64 respectively.

[0025] When the unlocking assembly 5 drives the lock body assembly 7, the unlocking assembly 5 drives the lock body assembly 7 to unlock. The unlocking assembly 5 drives the micro switch lever 64 to move. The micro switch lever 64 drives the first micro switch 61 to output an unlock signal. The lock body assembly 7 drives the second micro switch 62 to output an unlock signal. The motor 3 is turned off.

[0026] When the lock body assembly 7 is separated from the second micro switch 62 and the first micro switch 61 outputs an unlock signal, the second micro switch 62 outputs a lock signal. The motor 3 is started. The motor 3 drives the lock body assembly 7 to lock in sequence through the worm assembly 4 and the transmission assembly 8.

[0027] When the unlocking assembly 5 is separated from the micro switch lever 64 and the second micro switch 62, the first micro switch 61 and the second micro switch 62 output the locking signal, and the motor 3 is closed.

[0028] Further, the lock body assembly 7 comprises a pawl assembly 71, a pawl spring 72, a ratchet assembly 73 and a ratchet spring 74. The two ends of the pawl spring 72 are fixedly connected with the bottom plate 1 and the pawl assembly 71 respectively. The two ends of the ratchet spring 74 are fixedly connected with the bottom plate 1 and the ratchet assembly 73 respectively. The pawl assembly 71 abuts against the ratchet assembly 73. The pawl assembly 71 is connected with the unlocking assembly 5. The ratchet assembly 73 is connected with the transmission assembly 8. The pawl assembly 71 and the ratchet assembly 73 are connected with the micro switch assembly 6.

[0029] When the unlocking assembly 5 drives the pawl assembly 71, the pawl assembly 71 is separated from the micro switch assembly 6. The unlocking assembly 5 drives the micro switch assembly 6 to output the unlocking signal. The pawl assembly 71 is separated from the ratchet assembly 73. The ratchet spring 74 drives the ratchet assembly 73 to be unlocked. The ratchet assembly 73 drives the micro switch assembly 6 to output the unlocking signal. The motor 3 is closed.

[0030] When the ratchet assembly 73 is partially separated from the micro switch assembly 6, the micro switch assembly 6 outputs the unlocking signal and the locking signal. The motor 3 is started. The motor 3 drives the ratchet assembly 73 to be locked through the worm assembly 4 and the transmission assembly 8 in sequence.

[0031] When the ratchet assembly 73 is completely separated from the micro switch assembly 6, the micro switch assembly 6 outputs the locking signal. The motor 3 is closed.

[0032] Further, the unlocking assembly 5 comprises an unlocking half tooth 51, an unlocking tab group 52, an unlocking connecting rod 53 and an unlocking spring 54. The unlocking half tooth 51 is connected with the worm assembly 4. The unlocking tab group 52 is fixedly connected with the unlocking half tooth 51. The unlocking connecting rod 53 is connected with the unlocking tab group 52. The pawl assembly 71 and the micro switch lever 64 are connected with the unlocking connecting rod 53 away from the unlocking tab group 52. The pawl assembly 71 and the micro switch lever 64 are respectively arranged on the two sides of the unlocking connecting rod 53. The two ends of the unlocking spring 54 are fixedly connected with the unlocking connecting rod 53 and the cover plate 2 respectively.

[0033] Further, the transmission assembly 8 comprises a transmission nut 81, a locking plate 82, a crank connecting rod assembly 83 and a locking spring 84. The transmission nut 81 is connected with the worm assembly 4. The locking plate 82 and the crank connecting rod assembly 83 are fixedly connected. The transmission nut 81 is used to abut against the locking plate 82. The crank connecting rod is used to abut against the ratchet assembly 73. The two ends of the locking spring 84 are fixedly connected with the locking plate 82 and the bottom plate 1 respectively.

[0034] The bottom plate 1 and the cover plate 2 constitute a lock body frame, in use, the unlocking half tooth 51 is driven to rotate by the motor 3 and the worm assembly 4, the unlocking half tooth 51 directly drives the unlocking paddle set 52 to rotate, the unlocking paddle set 52 rotates and abuts against the unlocking connecting rod 53, thereby driving the unlocking connecting rod 53 to abut against and push away the ratchet assembly 71, and simultaneously driving the micro switch lever 64 to rotate, the micro switch lever 64 abuts against the first micro switch 61, the first micro switch 61 outputs an unlocking (OFF) signal, and after the ratchet assembly 71 is pushed away, the ratchet assembly 71 is released, that is, no longer abuts against the ratchet wheel assembly 73, the ratchet wheel assembly 73 is unlocked under the action of the ratchet spring 74, at this time, the tail of the ratchet wheel assembly 73 touches the second micro switch 62, the second micro switch 62 outputs an (OFF) signal, when the ECU system receives two unlocking (OFF) signals, the movement of the tail door lock is stopped;

[0035] When the ratchet wheel assembly 73 is in the half-lock state, the ratchet wheel assembly 73 is separated from the second micro switch 62, at this time, the second micro switch 62 outputs a locking (ON) signal, and because it is in the half-lock state, the ratchet wheel assembly 73 still abuts against the micro switch lever 64, so the micro switch lever 64 still abuts against the first micro switch 61, so the first micro switch 61 outputs an unlocking (OFF) signal, therefore, the ECU system simultaneously receives the locking (ON) signal and the unlocking (OFF) signal, and at this time, the ECU system controls the motor 3 to start, and the motor 3 drives the transmission nut 81 to move through the worm assembly 4, the transmission nut 81 moves and abuts against the locking plate 82, and drives the crank connecting rod assembly 83 to rotate, so that the locking plate 82 and the crank connecting rod assembly 83 can rotate clockwise, the crank connecting rod assembly 83 abuts against the back stop of the ratchet wheel assembly 73 when rotating, thereby forcing the ratchet wheel assembly 73 to rotate to the full-lock direction, so that the action of the automobile tail door being sucked into the vehicle body is completed;

[0036] When the ratchet wheel assembly 73 is in the full-lock position, the ratchet wheel assembly 73 is separated from the micro switch lever 64, the first micro switch 61 outputs a locking (ON) signal, at this time, the ECU system receives two locking (ON) signals, indicating that the tail door is locked, and the movement of the tail door lock is stopped;

[0037] The motor 3 and the worm assembly 4 drive the transmission nut 81 and the unlocking half tooth 51, the unlocking half tooth 51 and the unlocking paddle set 52 move and push away the unlocking connecting rod 53, the unlocking connecting rod 53 pushes away the ratchet assembly 71, and the ratchet wheel assembly 73 is unlocked under the action of the torsional spring;

[0038] When the ratchet assembly 73 is in the semi-locked state, the transmission nut 81 is driven to move to the right by the motor 3 and the worm gear assembly 4. The transmission nut 81 touches the upper locking plate 82 and the crank connecting rod assembly 83 and rotates to the right. At this time, the crank connecting rod assembly 83 will hit the stop behind the ratchet, forcing the ratchet assembly 73 to rotate in the fully locked direction, thus completing the action of sucking the car tailgate into the car body.

[0039] This utility model is safer than traditional tailgate locks without self-closing mechanism, and the lock itself is compact, with dimensions of 124mm*98mm*70mm, making it easy to install in tight spaces in the vehicle body and allowing for better weight reduction. The self-closing and unlocking mechanisms are controlled by the vehicle's ECU, making it easier to achieve intelligent operation.

[0040] Furthermore, the lock body assembly 7 also includes a first unlocking handle 75, one end of which is located inside the frame and close to the unlocking link 53, and the other end of which is located outside the frame.

[0041] When actively unlocking, the first unlocking lever 75 abuts against the unlocking linkage 53, and the unlocking linkage 53 drives the first micro switch 61 to output a signal through the micro switch lever 64.

[0042] Furthermore, there is a gap between the unlocking linkage 53 and the first unlocking handle 75.

[0043] Furthermore, the lock body assembly 7 also includes a second unlocking handle 76, one end of which is located inside the frame and close to the crank connecting rod assembly 83, and the other end of which is located outside the frame.

[0044] When actively unlocking, the second unlocking lever 76 abuts against the crank connecting rod assembly 83, and the crank connecting rod assembly 83 abuts against the ratchet assembly 73.

[0045] Furthermore, a gap is provided between the crank connecting rod assembly 83 and the second unlocking lever lock 76.

[0046] Furthermore, the lock body assembly 7 also includes an unlocking handle spring 77, the two ends of which are fixedly connected to the first unlocking handle 75 and the second unlocking handle 76, respectively.

[0047] The two microswitches transmit information wirelessly and are directly controlled wirelessly by the ECU system. Therefore, a mechanical structure is required as a safety measure. For this purpose, a first unlocking lever 75 and a second unlocking lever 76 are provided, and the first unlocking lever 75 and the second unlocking lever 76 are linked by an unlocking lever spring 77 to avoid functional conflict between the two. In addition, since the vehicle body inevitably vibrates during driving, in order to reduce the possibility of the first unlocking lever 75 abutting the unlocking linkage 53 or the second unlocking lever 76 abutting the crank connecting rod assembly 83 in case of an accident, a gap is provided between the unlocking linkage 53 and the first unlocking lever 75, and a gap is provided between the crank connecting rod assembly 83 and the second unlocking lever 76, thereby enhancing safety while ensuring the practicality of the mechanical structure.

[0048] Furthermore, the pawl assembly 71 is provided with a first groove 711, and the micro switch lever 64 is fixedly connected to a contact member 65;

[0049] After the unlocking linkage 53 abuts against the pawl assembly 71, the pawl assembly 71 moves away from the micro switch lever 64, and the contact member 65 abuts against the inner wall of the first groove 711.

[0050] Furthermore, the contact member 65 is provided with a second groove 66;

[0051] When the contact member 65 contacts the inner wall of the first groove 711, the inner wall of the second groove 66 abuts against the inner wall of the first groove 711.

[0052] The microswitch lever 64 is an important medium for controlling the two microswitches, while the pawl assembly 71 is one of the components that directly affects the rotation of the microswitch lever 64. During the unlocking process, especially when in a semi-locked state, in order to prevent changes in the output signal of the microswitches, it is necessary to fix the relative position between the microswitch lever 64 and the pawl assembly 71. Therefore, an abutment 65 is provided. After the pawl assembly 71 is moved by the unlocking linkage 53, the abutment 65 increases the contact surface by abutting against the inner wall of the first groove 711, thereby preventing the microswitch lever 64 and the pawl assembly 71 from accidentally resetting. On this basis, a second groove 66 is provided on the abutment 65, and the inner wall of the second groove 66 abuts against the inner wall of the first groove 711. This not only increases the contact surface but also increases the contact direction, thereby further reducing the possibility of the microswitch lever 64 and the pawl assembly 71 accidentally resetting.

[0053] Furthermore, the unlocking paddle group 52 is located outside the frame, and the end of the unlocking linkage 53 facing the unlocking paddle group 52 is located outside the frame.

[0054] The unlocking paddle group 52 and the unlocking linkage 53 are the end of the unlocking assembly 5 closest to the drive source. Since the drive source adopts a half-tooth structure for connection, the unlocking paddle group 52 can be directly controlled from the outside. The unlocking paddle group 52 will not conflict with the worm gear assembly 4.

[0055] By placing the unlocking paddle group 52 and unlocking linkage 53 externally, the internal space of the frame can be simplified, making the layout of the core components on the inner wall more compact and reasonable. At the same time, it reduces the possibility of motion interference during the unlocking and locking processes. The external unlocking paddle group 52 can be operated directly through the additional components using special tools. In an emergency, it can be used as an independent emergency unlocking structure to prevent the inability to unlock directly when the ECU system fails. Furthermore, the physical isolation design can effectively prevent chain failures caused by accidental activation.

[0056] Furthermore, the worm gear assembly 4 includes a first worm 41, a first turbine 42, a second worm 43, a second turbine 44, and a threaded rod 45. The first worm 41 is connected to the motor 3, the first turbine 42 is connected to the first worm 41, the first turbine 42 and the second worm 43 are fixedly connected, the second worm 43 and the second turbine 44 are connected, the second turbine 44 and the threaded rod 45 are coaxially fixedly connected, the transmission nut 81 is connected to the threaded rod 45, and the unlocking half-tooth 51 is connected to the first worm 41.

[0057] Furthermore, the second worm gear 43 is tilted.

[0058] The motor 3 can increase torque through the cooperation of two worms and two turbines. If necessary, an additional worm gear structure can also be added. In addition, the tilt of the second worm 43 can increase the stability of the transmission process, and the stability of the second worm 43 itself can be maintained by the shape of the base plate 1 without affecting the transmission.

[0059] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. An electric self-sucking tailgate lock, characterized by, The application relates to a lock, which comprises a bottom plate, a cover plate, a motor, a worm assembly, an unlocking assembly, a micro-switch assembly, a lock body assembly and a transmission assembly. The lock body assembly comprises a pawl assembly, a pawl spring, a ratchet wheel assembly and a ratchet wheel spring. When the unlocking assembly drives the pawl assembly, the pawl assembly is separated from the micro-switch assembly, the unlocking assembly drives the micro-switch assembly to output an unlocking signal, the pawl assembly is separated from the ratchet wheel assembly, the ratchet wheel spring drives the ratchet wheel assembly to be unlocked, the ratchet wheel assembly drives the micro-switch assembly to output an unlocking signal, and the motor is turned off. When the ratchet wheel assembly is partially separated from the micro-switch assembly, the micro-switch assembly outputs an unlocking signal and a locking signal, the motor is started, the motor drives the ratchet wheel assembly to be locked through the worm assembly and the transmission assembly in sequence, and the motor is turned off when the ratchet wheel assembly is completely separated from the micro-switch assembly. The micro-switch assembly comprises a first micro-switch, a second micro-switch, a lever spring and a micro-switch lever.

2. The electric self-pumping tailgate lock of claim 1, wherein, The unlocking assembly comprises an unlocking half-tooth, an unlocking lever group, an unlocking connecting rod and an unlocking spring.

3. An electric self-sucking tailgate lock as defined in claim 2 wherein, The pawl assembly is provided with a first recess, and the micro-switch lever is fixedly connected with an abutting part.

4. An electric self-sucking tailgate lock as defined in claim 3 wherein, When the unlocking connecting rod abuts against the pawl assembly, the pawl assembly is separated from the micro-switch lever, and the abutting part abuts against the inner wall of the first recess. The abutting part is provided with a second recess.

5. An electric self-pumping tailgate lock as defined in claim 4, wherein, When the abutting part abuts against the inner wall of the first recess, the inner wall of the second recess abuts against the inner wall of the first recess. The unlocking lever group is arranged outside the frame, and the end of the unlocking connecting rod, which faces the unlocking lever group, is arranged outside the frame.

6. The electric self-pumping tailgate lock of claim 3, wherein, The unlocking lever group is arranged outside the frame, and the end of the unlocking connecting rod, which faces the unlocking lever group, is arranged outside the frame.

7. An electric self-servicing tailgate lock according to any one of claims 3-6, wherein, The transmission assembly comprises a transmission nut, an upper locking plate, a crank connecting rod assembly and an upper locking spring, the transmission nut is connected with the worm assembly, the upper locking plate and the crank connecting rod assembly are fixedly connected, the transmission nut is used for abutting against the upper locking plate, the crank connecting rod is used for abutting against the ratchet wheel assembly, and the upper locking spring is fixedly connected with the upper locking plate and the bottom plate at two ends respectively.

8. An electric self-sucking tailgate lock as defined in claim 7 wherein, The worm assembly comprises a first worm, a first turbine, a second worm, a second turbine and a threaded rod, the first worm is connected with the motor, the first turbine is connected with the first worm, the first turbine and the second worm are fixedly connected, the second worm is connected with the second turbine, the second turbine is fixedly connected with the threaded rod in a coaxial manner, the transmission nut is connected with the threaded rod, and the unlocking half tooth is connected with the first worm.

9. An electric self-sucking tailgate lock as defined in claim 8 wherein, The second worm is arranged in an inclined manner.

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