An automotive door self-latching lock

Abstract

An automotive door self-locking latch, belonging to the technical field of automotive door locks, includes a first base and a second base. One end face of the second base facing the first base is adhesively provided with a suction cylinder. A driving motor is fixedly installed on the end face of the second base away from the first base. One end face of the first base facing the second base is fixedly connected with an induction cylinder. When closing the door of the present invention, the system cooperates with a trigger rod and a pressure sensor, and the driving motor controls the suction cylinder to rotate. The door is automatically tightened from semi-locked to fully locked by using a sliding column and a guide groove, without modifying the original vehicle lock structure, ensuring easy design and usability. At the same time, a buffer rod and a flow-limiting hole cooperate to perform positioning buffering by adjusting the hydraulic oil flow rate, reducing impact and noise, so that the door stops stably at the semi-locked position without affecting the operation of the suction components. In addition, the design of the guide groove and the separation groove can automatically unlock, and no additional operation is required to open the door, greatly improving the usability and enhancing the reliability of the device.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive door locks, and particularly to an auto door self - engaging lock catch. Background Art

[0002] Automotive door locks are an important part of the vehicle body. They are special components integrating safety, decoration, and craftsmanship. With the development of the automotive industry, the functions and types of automotive door locks are increasing day by day. As passengers' understanding of automotive knowledge grows, their requirements for automotive comfort are also getting higher and higher. Among them, for car doors, the degree of attention paid by customers and vehicle manufacturers to user - friendly opening and closing is also getting deeper and deeper.

[0003] Currently, when a traditional side door lock closes, after the ratchet rotates to a certain angle, the pawl catches the ratchet due to the action of the spring to achieve the locking function. This process depends on the closing force of the occupant. If the force is insufficient, the door cannot be completely locked, and the occupant needs to close the door again until it is fully locked. To make the use of the car more convenient and fast, electric self - engaging door locks have gradually emerged in the market to replace traditional mechanical door locks. This type of lock can automatically engage the door to enter the fully locked state after manually closing the door initially to a semi - locked state, enabling users to close the door without exerting force.

[0004] For existing automotive door locks with self - engaging functions, some side door locks achieve the engaging function through the relative movement of the lock catch plate, and some achieve the engagement through an engaging link connecting the actuator mechanism. However, converting a traditional mechanical door lock into a self - engaging lock usually requires changing the structure inside the original vehicle lock, which increases the structural complexity. In some cases, it even requires replacing the entire lock, greatly increasing the use and maintenance costs. Moreover, during the door closing process, the noise generated by forcefully closing the door causes discomfort to people and affects its service life. Summary of the Invention

[0005] The object of the present invention is to solve the problem that converting a traditional mechanical door lock into a self - engaging lock in the prior art usually requires changing the structure inside the original vehicle lock, thereby increasing the structural complexity, and to propose an auto door self - engaging lock catch.

[0006] To achieve the above object, the present invention adopts the following technical scheme:

[0007] An auto door self - engaging lock catch includes a first base and a second base. One end face of the second base facing the first base is adhesively provided with an engaging cylinder. A drive motor is fixedly installed on the end face of the second base away from the first base. One end face of the first base facing the second base is fixedly connected with an induction cylinder;

[0008] One end face of the base one is provided with a suction component, so that when the vehicle door is closed, the vehicle door can be tightened from the half-locked state to the fully-locked state without changing the structure inside the original vehicle lock;

[0009] A buffer positioning component is arranged inside the induction cylinder, so that when the vehicle door is closed, the closed vehicle door can be buffered and positioned, and the impact and noise when the vehicle door is closed are reduced.

[0010] Furthermore, the suction component includes fixed rods. The two fixed rods are symmetrically and fixedly connected to one end face of the base one facing the base two, and an activity groove is penetrated and opened inside the end of the fixed rod away from the base one. A sliding column is fitted and slidably connected to the inner wall of the activity groove. Connecting blocks are fixedly connected to the ends of the two sliding columns away from each other, and a tension spring is fitted on the outer wall of the sliding column. One end of the tension spring is fixedly connected to the outer walls of the two fixed rods away from each other, and the other end of the tension spring is fixedly connected to the end faces of the two connecting blocks close to each other.

[0011] Furthermore, guiding grooves are symmetrically opened on the outer wall of the suction cylinder corresponding to the sliding columns. The sliding columns and the connecting blocks form a telescopic structure through the tension spring. The ends of the two sliding columns close to each other are pressed against the inner wall of the guiding groove through the tension spring. Separation grooves are symmetrically opened on the end face of the suction cylinder facing the base one, and the inner wall of the separation groove is communicated with the inner wall of the guiding groove.

[0012] Furthermore, auxiliary rings are symmetrically and fixedly connected to the end face of the suction cylinder facing the base one, and the end face of the auxiliary ring facing the base one is bevel-shaped. A driving rod is fixedly connected to one end output shaft of the driving motor, and the outer wall of the driving rod is fixedly connected to the inside of the suction cylinder.

[0013] Furthermore, a circular groove is opened at the center of the end face of the induction cylinder facing the base two, and a pressure sensor is fixedly installed on the inner wall of the circular groove. One end face of the pressure sensor is fixedly connected to a first spring, and the other end of the first spring is fixedly connected to a trigger rod. The outer wall of the trigger rod is in sliding fit with the inner wall of the circular groove. The pressure sensor is electrically connected to the driving motor.

[0014] Furthermore, the buffer positioning component includes sliding grooves. The four sliding grooves are equidistantly opened inside the induction cylinder, and buffer rods are fitted and slidably connected to the inner walls of the sliding grooves. A rubber pad is fixedly connected to the end of the buffer rod facing the suction cylinder. Storage grooves are opened inside the induction cylinder corresponding to the sliding grooves, and flow-limiting holes are opened on the inner walls of the sliding grooves. The sliding grooves are communicated with the storage grooves through the flow-limiting holes, and the inner diameter of the inner wall of the flow-limiting hole is smaller than the inner diameter of the inner wall of the sliding groove. Limiting grooves are symmetrically opened on the inner walls of the sliding grooves. Limiting blocks are symmetrically and fixedly connected to the outer wall of the buffer rod away from the rubber pad, and the outer wall of the limiting block is in sliding fit with the inner wall of the limiting groove.

[0015] Furthermore, a second spring is fixedly connected to the inner wall of the storage groove, and a push plate is fixedly connected to the other end of the second spring corresponding to the flow limiting hole. The outer wall of the push plate is in sliding fit with the inner wall of the storage groove, and the push plate and the storage groove form a telescopic structure through the second spring.

[0016] Furthermore, mounting blocks are symmetrically and fixedly installed on the outer walls of the first base and the second base.

[0017] Compared with the prior art, the above solution has the following beneficial effects:

[0018] 1. When closing the car door, through the cooperation of the trigger rod and the pressure sensor, the driving motor can be controlled to rotate the suction cylinder. Thus, through the cooperation of the sliding column and the guide groove, the car door can be tightened, enabling the car door to change from the semi-locked state to the fully locked state without changing the structure inside the original car lock. The structure is simple, ensuring the compatibility and usability of the design. And through the cooperation of the guide groove and the separation groove, after tightening the car door, the suction component can automatically enter the unlocked state. When opening the car door, no additional unlocking operation is required, greatly improving the convenience of use.

[0019] 2. When closing the car door, through the cooperation of the buffer rod and the flow limiting hole, the hydraulic oil flow regulation and energy conversion can be used to position and buffer the closing car door, effectively reducing the impact and noise when the car door is closed, enabling the car door to stop steadily at the semi-locked position without affecting the tightening and adsorption of the suction component on the car door, thereby improving the reliability of the device during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structural schematic diagram of the overall self-suction lock for a car door proposed by the present invention;

[0021] Figure 2 It is a three-dimensional structural schematic diagram of the suction state of the self-suction lock for a car door proposed by the present invention;

[0022] Figure 3 It is a three-dimensional structural schematic diagram of the parts of the self-suction lock for a car door proposed by the present invention installed on the second base;

[0023] Figure 4 It is a three-dimensional structural schematic diagram of the parts of the self-suction lock for a car door proposed by the present invention installed on the first base;

[0024] Figure 5 It is a three-dimensional structural schematic diagram of the suction component of the self-suction lock for a car door proposed by the present invention;

[0025] Figure 6Schematic three-dimensional structure diagram of a buffer positioning component of a self - suction lock for a car door proposed by the present invention. Detailed implementation manners

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0027] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "top surface", "bottom surface", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated position or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish an entity or operation from another entity or operation, and do not require or imply any actual relationship, order or relative importance between these entities or operations.

[0028] Embodiment 1, referring to Figures 1-6 , a self - suction lock for a car door, including a first base 1 and a second base 2. A suction cylinder 3 is attached to one end face of the second base 2 facing the first base 1. A driving motor 4 is fixedly installed on the other end face of the second base 2 away from the first base 1. A sensing cylinder 5 is fixedly connected to one end face of the first base 1 facing the second base 2;

[0029] A suction component 6 is arranged on one end face of the first base 1. The suction component 6 includes a fixed rod 601. Two fixed rods 601 are symmetrically and fixedly connected to one end face of the first base 1 facing the second base 2. An activity slot 602 is penetrated and opened inside the end of the fixed rod 601 away from the first base 1. A sliding column 603 is slidably connected to the inner wall of the activity slot 602 in a fitting manner. Connecting blocks 604 are fixedly connected to the ends of the two sliding columns 603 away from each other. A tension spring 605 is attached to the outer wall of the sliding column 603. One end of the tension spring 605 is fixedly connected to the outer wall on the side where the two fixed rods 601 are away from each other, and the other end of the tension spring 605 is fixedly connected to the end face where the two connecting blocks 604 are close to each other;

[0030] In this embodiment, first, in this device, the first base 1 is fixedly installed on the car door through a mounting block 16, and the second base 2 is fixedly installed at the corresponding position on the vehicle body through a mounting block 16. Thus, when the car door is closed, the first base 1 can move towards the position of the second base 2;

[0031] Then, when the vehicle door is closed, two fixing rods 601 are symmetrically and fixedly connected to one end face of the base one 1 facing the base two 2. An activity groove 602 is internally and penetratingly formed at one end of the fixing rod 601 far away from the base one 1. A sliding column 603 is in sliding connection with the inner wall of the activity groove 602 in a fitting manner, so as to be able to synchronously drive the two sliding columns 603 to move towards the position of the suction cylinder 3;

[0032] Then, during the process of closing the vehicle door, auxiliary rings 10 are symmetrically and fixedly connected to the end face of the suction cylinder 3 facing the base one 1 corresponding to the sliding columns 603. The end face of the auxiliary ring 10 facing the base one 1 is in an inclined shape. The sliding column 603 and the connecting block 604 form a telescopic structure through a tension spring 605. Thus, when the vehicle door is about to be initially closed, the ends of the two sliding columns 603 will come into contact with the inclined surface of the auxiliary ring 10 in advance, so that the two sliding columns 603 contract and continue to move. When the vehicle door is initially closed and enters the semi-locked state, at this time, guiding grooves 8 are symmetrically formed in the outer wall of the suction cylinder 3 corresponding to the sliding columns 603. The ends of the two sliding columns 603 close to each other are pressed against the inner wall of the guiding groove 8 through the tension spring 605, so that the ends of the two sliding columns 603 close to each other are located at the initial position of the guiding groove 8;

[0033] Then, at this time, a driving rod 11 is fixedly connected to the output shaft at one end of the driving motor 4. The outer wall of the driving rod 11 is fixedly connected to the inside of the suction cylinder 3. A circular groove 12 is formed at the center of the end face of the induction cylinder 5 facing the base two 2. A pressure sensor 13 is fixedly installed on the inner wall of the circular groove 12. One end face of the pressure sensor 13 is fixedly connected to a first spring 14. The other end of the first spring 14 is fixedly connected to a trigger rod 15. The outer wall of the trigger rod 15 is in sliding connection with the inner wall of the circular groove 12 in a fitting manner. Thus, when the sliding column 603 is just located at the initial position of the guiding groove 8, at this time, the trigger rod 15 will abut against the inner wall of the suction cylinder 3 and contract a certain distance, so as to be able to squeeze the pressure sensor 13 by using the first spring 14, so that the pressure sensor 13 sends a signal to the driving motor 4, and then the driving motor 4 can drive the driving rod 11 to rotate, so as to drive the suction cylinder 3 to rotate, so that the two sliding columns 603 slide on the inner wall of the guiding groove 8, so as to tighten the vehicle door and make the vehicle door change from the semi-locked state to the fully locked state without changing the structure inside the original vehicle lock, and the structure is simple;

[0034] Next, a separation groove 9 is symmetrically opened on one end face of the suction cylinder 3 facing the base 1, and the inner wall of the separation groove 9 is communicated with the inner wall of the guide groove 8. Thus, under the guidance of the guide groove 8, when the sliding column 603 slides to the final position of the guide groove 8, the car door will enter the fully locked state by its own car lock. At the same time, the sliding column 603 will slide into the separation groove 9 from the guide groove 8 accordingly. When the car door needs to be opened, the original car lock unlocking wrench inside the car door can be directly pulled to open the car door. At this time, the sliding column 603 will be able to slide out of the separation groove 9 accordingly. Thus, after the car door is tightened, the suction component 6 can be automatically unlocked. When opening the car door, no additional unlocking operation is required, greatly improving the convenience of use;

[0035] Next, after the car door is opened, the trigger rod 15 is no longer pressed by the suction cylinder 3 at this time, so that the pressure sensor 13 returns to the normal pressure value, thereby reversing and resetting the suction cylinder 3 to wait for the next car door closing;

[0036] Through the above description, when closing the car door, the driving motor 4 can be controlled to rotate the suction cylinder 3 through the cooperation of the trigger rod 15 and the pressure sensor 13. Thus, the car door can be tightened through the cooperation of the sliding column 603 and the guide groove 8, so that the car door changes from the semi-locked state to the fully locked state without changing the structure inside the original car lock. The structure is simple, ensuring the compatibility and usability of the design. And through the cooperation of the guide groove 8 and the separation groove 9, after the car door is tightened, the suction component 6 can be automatically unlocked. When opening the car door, no additional unlocking operation is required, greatly improving the convenience of use.

[0037] Embodiment 2, a buffer positioning component 7 is arranged inside the induction cylinder 5. The buffer positioning component 7 includes a sliding groove 701. Four sliding grooves 701 are equidistantly opened inside the induction cylinder 5, and a buffer rod 702 is slidably connected to the inner wall of the sliding groove 701 in a fitting manner. One end of the buffer rod 702 facing the suction cylinder 3 is fixedly connected with a rubber pad 703. A storage groove 704 is opened inside the induction cylinder 5 corresponding to the sliding groove 701, and a flow limiting hole 705 is opened on the inner wall of the sliding groove 701. The sliding groove 701 is communicated with the storage groove 704 through the flow limiting hole 705, and the inner wall aperture of the flow limiting hole 705 is smaller than the inner wall aperture of the sliding groove 701. Limiting grooves 706 are symmetrically opened on the inner wall of the sliding groove 701. On the outer wall of the end of the buffer rod 702 far from the rubber pad 703, limiting blocks 707 are symmetrically fixedly connected, and the outer wall of the limiting block 707 is in sliding fit with the inner wall of the limiting groove 706;

[0038] In this embodiment, when the sliding column 603 is at the initial position of the guiding groove 8, at this time, the buffer rod 702 is in sliding connection with the inner wall of the sliding groove 701 in a fitting manner, and a rubber pad 703 is fixedly connected to one end of the buffer rod 702 facing the suction cylinder 3, so that the buffer rod 702 is in fitting contact with the inner wall of the suction cylinder 3 through the rubber pad 703. At this time, when the vehicle door continues to move, a storage groove 704 is provided in the induction cylinder 5 corresponding to the sliding groove 701, a flow limiting hole 705 is provided in the inner wall of the sliding groove 701, and the sliding groove 701 is communicated with the storage groove 704 through the flow limiting hole 705. At the same time, the inner wall aperture of the flow limiting hole 705 is smaller than the inner wall aperture of the sliding groove 701, so that the hydraulic oil in the sliding groove 701 can be extruded by the buffer rod 702. At this time, since the inner wall aperture of the flow limiting hole 705 is smaller than the inner wall aperture of the sliding groove 701, the flow rate of the hydraulic oil can be limited by the flow limiting hole 705, thereby generating a damping effect, which can effectively reduce the impact and noise when the vehicle door is closed, enable the vehicle door to stop stably at the semi-locked position, and when the vehicle door is subsequently sucked, the tensioning rate of the vehicle door will not generate a large damping effect, and thus will not affect the tensioning and adsorption of the vehicle door by the suction component 6, thereby improving the reliability of the equipment during use;

[0039] Then when the vehicle door is opened, limiting grooves 706 are symmetrically provided in the inner wall of the sliding groove 701, limiting blocks 707 are symmetrically fixedly connected to the outer wall of one end of the buffer rod 702 away from the rubber pad 703, and the outer wall of the limiting block 707 is in sliding contact with the inner wall of the limiting groove 706. At the same time, a second spring 708 is fixedly connected to the inner wall of the storage groove 704, a pushing plate 709 is fixedly connected to the other end of the second spring 708 corresponding to the flow limiting hole 705, and the outer wall of the pushing plate 709 is in sliding contact with the inner wall of the storage groove 704. At the same time, the pushing plate 709 and the storage groove 704 form a telescopic structure through the second spring 708, so that the second spring 708 can drive the pushing plate 709 to push the hydraulic oil flowing into the storage groove 704 from the flow limiting hole 705 back into the sliding groove 701, and the buffer rod 702 is pushed back to its original position accordingly, and the cooperation between the limiting block 707 and the limiting groove 706 is used to prevent the buffer rod 702 from disengaging from the sliding groove 701, completing the reset of the buffer positioning component 7;

[0040] Through the above description, when the vehicle door is closed, the buffer rod 702 and the flow limiting hole 705 can be used in cooperation to position and buffer the closed vehicle door by adjusting the flow rate of the hydraulic oil and energy conversion, which can effectively reduce the impact and noise when the vehicle door is closed, enable the vehicle door to stop stably at the semi-locked position, and does not affect the tensioning and adsorption of the vehicle door by the suction component 6, thereby improving the reliability of the equipment during use.

[0041] Working principle of the present invention: When the vehicle door is closed, two fixed rods 601 are symmetrically and fixedly connected to one end surface of the first base 1 facing the second base 2. An activity groove 602 is penetrated and opened inside the end of the fixed rod 601 far from the first base 1. A sliding column 603 is fitted and slidably connected to the inner wall of the activity groove 602, so as to be able to synchronously drive the two sliding columns 603 to move towards the position of the suction cylinder 3. Then, auxiliary rings 10 are symmetrically and fixedly connected to the end surface of the suction cylinder 3 facing the first base 1 corresponding to the sliding columns 603. The end surface of the auxiliary ring 10 facing the first base 1 is bevel-shaped. The sliding column 603 and a connecting block 604 form a telescopic structure through a tension spring 605. Thus, when the vehicle door is about to be initially closed, the ends of the two sliding columns 603 will pre-contact the bevel surface of the auxiliary ring 10 at this time, so that the two sliding columns 603 contract and continue to move. When the vehicle door is initially closed and enters the semi-locked state, the approaching ends of the two sliding columns 603 are located at the initial position of the guiding groove 8;

[0042] Then, the outer wall of the trigger rod 15 is in sliding fit with the inner wall of the circular groove 12. Thus, when the sliding column 603 is just located at the initial position of the guiding groove 8, the trigger rod 15 will abut against the inner wall of the suction cylinder 3 and contract a certain distance at this time, so as to be able to squeeze the pressure sensor 13 by the first spring 14, so that the pressure sensor 13 sends a signal to the driving motor 4. Furthermore, the driving rod 11 can be driven to rotate by the driving motor 4 to drive the suction cylinder 3 to rotate, so that the two sliding columns 603 slide on the inner wall of the guiding groove 8 to tighten the vehicle door, so that the vehicle door changes from the semi-locked state to the fully locked state;

[0043] Then, separation grooves 9 are symmetrically opened on the end surface of the suction cylinder 3 facing the first base 1. The inner wall of the separation groove 9 is communicated with the inner wall of the guiding groove 8. Thus, under the guidance of the guiding groove 8, when the sliding column 603 slides to the final position of the guiding groove 8, the vehicle door will enter the fully locked state from its own vehicle lock at this time. At the same time, the sliding column 603 will slide into the separation groove 9 from the guiding groove 8 accordingly. When the vehicle door needs to be opened, the original vehicle lock unlocking wrench inside the vehicle door can be directly pulled to open the vehicle door. At this time, the sliding column 603 will be able to slide out of the separation groove 9 accordingly. Thus, after the vehicle door is tightened, the suction component 6 can be automatically unlocked. When the vehicle door is opened, no additional unlocking operation is required;

[0044] Then, when the slide column 603 is located at the initial position of the guide groove 8, when the door continues to move, a storage groove 704 is opened in the corresponding slide groove 701 through the inner part of the sensing cylinder 5, and a limiting flow hole 705 is opened on the inner wall of the slide groove 701, and the slide groove 701 is connected to the storage groove 704 through the limiting flow hole 705. At the same time, the inner wall diameter of the limiting flow hole 705 is smaller than the inner wall diameter of the slide groove 701, so that the hydraulic oil in the slide groove 701 can be squeezed through the buffer rod 702. Since the inner wall diameter of the flow-limiting hole 705 is smaller than the inner wall diameter of the slide groove 701, the flow-limiting hole 705 can be used to limit the flow rate of the hydraulic oil, thereby producing a damping effect, which can effectively reduce the impact and noise when the door is closed, so that the door can be stably stopped in the semi-locked position. Moreover, when the door is subsequently sucked in, the tightening rate of the door will not produce a large damping effect, thereby not affecting the tightening adsorption of the door by the suction component 6, thereby improving the reliability of the device when in use;

[0045] Then, when the car door is opened, a limiting groove 706 is symmetrically formed on the inner wall of the slide groove 701, and the outer wall of the end of the buffer rod 702 away from the rubber pad 703 is symmetrically fixedly connected to the limiting block 707, and the outer wall of the limiting block 707 slides in contact with the inner wall of the limiting groove 706. At the same time, the inner wall of the storage groove 704 is fixedly connected to the spring 2 708, and the other end of the spring 2 708 is fixedly connected to the push disk 709 corresponding to the flow limiting hole 705, and the outer wall of the push disk 709 is in contact with the flow limiting hole 705. The inner walls of the storage groove 704 slide in contact with each other, and at the same time, the pushing plate 709 forms a telescopic structure with the storage groove 704 through the spring 2 708, so that the spring 2 708 can drive the pushing plate 709 to push the hydraulic oil flowing into the storage groove 704 from the flow limiting hole 705 back into the slide groove 701, and push the buffer rod 702 back to its original position, and use the cooperation of the limit block 707 and the limit groove 706 to prevent the buffer rod 702 from detaching from the slide groove 701, thereby completing the reset of the buffer positioning component 7.

[0046] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. An automotive door self-locking latch, comprising a first base and a second base, characterized in that, One end face of the second base facing the first base is fittingly provided with a suction cylinder, one end face of the second base away from the first base is fixedly installed with a driving motor, and one end face of the first base facing the second base is fixedly connected with an induction cylinder; One end face of the first base is provided with a suction component to tightly pull the vehicle door from the semi-locked state to the fully locked state when the vehicle door is closed; The interior of the induction cylinder is provided with a buffer positioning component to buffer and position the closed vehicle door and reduce the impact and noise when the vehicle door is closed; Installation blocks are symmetrically and fixedly installed on the outer walls of both the first base and the second base; The first base is fixedly installed on the vehicle door through the installation block, while the second base is fixedly installed at the corresponding position on the vehicle body through the installation block; The suction component includes fixed rods. The two fixed rods are symmetrically and fixedly connected to one end face of the first base facing the second base, and an activity groove is formed through the interior of the end of the fixed rod away from the first base. A sliding column is fittingly and slidably connected to the inner wall of the activity groove. One ends of the two sliding columns away from each other are fixedly connected with a connecting block, and a tension spring is fittingly arranged on the outer wall of the sliding column. One end of the tension spring is fixedly connected to the outer walls of the two fixed rods away from each other, and the other end of the tension spring is fixedly connected to one end face of the two connecting blocks close to each other; Guide grooves are symmetrically formed in the outer wall of the suction cylinder corresponding to the sliding columns. The sliding columns and the connecting block form a telescopic structure through the tension spring. One ends of the two sliding columns close to each other are pressed against the inner wall of the guide groove through the tension spring. Separation grooves are symmetrically formed in one end face of the suction cylinder facing the first base, and the inner wall of the separation groove is communicated with the inner wall of the guide groove; Auxiliary rings are symmetrically and fixedly connected to one end face of the suction cylinder facing the first base, and one end face of the auxiliary ring facing the first base is beveled. One output shaft of the driving motor is fixedly connected with a driving rod, and the outer wall of the driving rod is fixedly connected to the interior of the suction cylinder; The driving motor drives the driving rod to rotate to drive the suction cylinder to rotate, so that the two sliding columns slide on the inner wall of the guide groove to tighten the vehicle door.

2. The self - suction lock catch for a vehicle door according to claim 1, wherein, A circular groove is formed in the center of one end face of the induction cylinder facing the second base, and a pressure sensor is fixedly installed on the inner wall of the circular groove. One end face of the pressure sensor is fixedly connected with a first spring, and the other end of the first spring is fixedly connected with a trigger rod. The outer wall of the trigger rod is fittingly and slidably connected to the inner wall of the circular groove. The pressure sensor is electrically connected to the driving motor.

3. The self - suction locking buckle for a car door according to claim 2, characterized in that, The buffer positioning component includes sliding grooves. The four sliding grooves are equidistantly formed in the interior of the induction cylinder, and a buffer rod is fittingly and slidably connected to the inner wall of the sliding groove. One end of the buffer rod facing the suction cylinder is fixedly connected with a rubber pad. Storage grooves are formed in the interior of the induction cylinder corresponding to the sliding grooves, and flow-limiting holes are formed in the inner wall of the sliding groove. The sliding groove is communicated with the storage groove through the flow-limiting hole, and the inner diameter of the inner wall of the flow-limiting hole is smaller than the inner diameter of the inner wall of the sliding groove. Limiting grooves are symmetrically formed in the inner wall of the sliding groove. Limiting blocks are symmetrically and fixedly connected to the outer wall of the buffer rod away from the rubber pad, and the outer wall of the limiting block is fittingly and slidably connected to the inner wall of the limiting groove.

4. The self - sucking lock catch for a car door according to claim 3, characterized in that, The inner wall of the storage groove is fixedly connected with a second spring, and the other end of the second spring is fixedly connected with a push plate corresponding to the current limiting hole. The outer wall of the push plate is in sliding fit with the inner wall of the storage groove, and the push plate and the storage groove form a telescopic structure through the second spring.

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