A vehicle door water sealing structure and vehicle

Abstract

The application discloses a kind of car door water seal structure and vehicle, it is related to automobile door sealing technical field, including at least two sealing strips, the sealing strip is formed by sealing strip upper segment and sealing strip lower segment connection closed structure;Bubble tube inside in the sealing strip lower segment is equipped with magnetic structure, the magnetic structure can increase the sealing load after door closing, so that sealing strip lower segment and sealing strip upper segment form differentiation load.The application reduces the sealing strip load when door closing on the basis of improving the sealing performance of car door, without affecting the sound quality of opening and closing door.

Description

Technical Field

[0001] This invention relates to the field of automotive door sealing technology, and in particular to a water-sealing structure for automotive doors and a vehicle thereof. Background Technology

[0002] Traditional car door sealing solutions typically consist of two sealing strips, installed on the side panel and the door respectively. Each sealing strip is a single-piece rubber extrusion with a uniform cross-sectional shape and structural parameters. The seal is achieved by the compression and deformation of the rubber tube by the door sheet metal when the door is closed, causing the tube to elastically recover. Because the sealing strip is a complete rubber strip, increasing the pressure on the entire strip increases the pressure across the entire strip, affecting the sound quality when the door opens and closes.

[0003] Existing technology discloses a door sealing strip that fills the inside of a sponge tube with magnetic elements and places an electromagnet inside the door. The magnetic force between the magnetic elements and the electromagnet provides sealing assistance when the door is closed. However, the magnetic sealing enhancement effect of the above solution is applied to the entire length of the sealing strip. When it is necessary to improve the waterproof sealing performance under water conditions, the sealing load of the entire sealing strip will increase simultaneously, resulting in an overall increase in closing force, which in turn affects the sound quality of opening and closing the door. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a water-sealing structure and vehicle for car doors that improves door sealing performance while reducing the load on the sealing strip when closing the door, without affecting the sound quality of opening and closing the door.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: In a first aspect, embodiments of the present invention provide a water-sealing structure for a vehicle door, including at least two sealing strips, wherein the sealing strips are connected by an upper section and a lower section to form a closed structure; the bubble tube in the lower section of the sealing strip is provided with a magnetic structure, which can increase the sealing pressure after the door is closed, so that the lower section and the upper section of the sealing strip form a differentiated pressure.

[0006] Secondly, embodiments of the present invention also provide a water-sealing structure for a vehicle door, including at least two sealing strips, wherein the sealing strips are connected by an upper section and a lower section to form a closed structure; the bubble tube in the lower section of the sealing strip is connected to a pressurizing structure, the pressurizing structure can increase the sealing ballast after the door is closed, so that the lower section and the upper section of the sealing strip form a differentiated ballast.

[0007] As a further implementation, the magnetic structure uses a magnetic material.

[0008] As a further implementation, the magnetic structure is an electromagnet, which is used to energize the door for a set period of time after it is closed.

[0009] As a further implementation, the control circuit of the electromagnet is connected to a controller, which is used to control the electromagnet to be energized according to the water wading signal.

[0010] As a further implementation, the pressurization structure employs a hydraulic pump or a pneumatic pump, which is connected to the connector at the lower end of the sealing strip via a hose.

[0011] As a further implementation, the connector is fitted with a proportional valve or a solenoid valve.

[0012] As a further implementation, the junction of the upper and lower sections of the sealing strip is located above the water level line.

[0013] Thirdly, embodiments of the present invention also provide a vehicle, including a front door and a rear door, both of which are equipped with the aforementioned door water-sealing structure.

[0014] As a further implementation, both the front and rear doors are equipped with a first sealing strip and a second sealing strip arranged sequentially from the outside to the inside.

[0015] The beneficial effects of this invention are as follows: The sealing strip of this invention consists of an upper section and a lower section connected to form a closed structure. The lower section of the sealing strip has a magnetic structure inside its bubble tube. By superimposing the deformation ballast of the bubble tube with magnetic force, the lower section of the sealing strip forms a differential sealing ballast greater than that of the upper section. Alternatively, the bubble tube of the lower section of the sealing strip is connected to a pressurization structure such as a hydraulic pump or a pneumatic pump. By injecting hydraulic oil or compressed gas into the bubble tube, the internal pressure of the bubble tube is increased, similarly achieving differential ballast between the lower and upper sections of the sealing strip. By applying additional sealing force only to the lower section of the sealing strip below the vehicle's wading water level, while maintaining the conventional ballast above the water level, the waterproof sealing performance of the door under wading conditions is improved without increasing the overall closing force or affecting the sound quality of opening and closing the door, thus balancing wading safety and overall vehicle quality experience. Attached Figure Description

[0016] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0017] Figure 1 This is a schematic diagram of a traditional car door sealing structure; Figure 2 This is a cross-sectional view of a traditional car door sealing structure; Figure 3 This is a schematic diagram of the segmented structure of the sealing strip according to one or more embodiments of the present invention; Figure 4This is a schematic diagram of the sealing strip installation state according to one or more embodiments of the present invention.

[0018] Among them, 1-front door; 2-second sealing strip of front door; 3-first sealing strip of front door; 4-rear door; 5-second sealing strip of rear door; 6-first sealing strip of rear door; 7-side panel; 8-upper section of second sealing strip; 9-upper section of first sealing strip; 10-lower section of second sealing strip; 11-lower section of first sealing strip. Detailed Implementation

[0019] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0020] For ease of description, the terms "upper," "lower," "front," and "rear" appearing in this invention only indicate that they correspond to the upper, lower, front, and rear directions in the accompanying drawings. They do not limit the structure and are merely used to facilitate the description and simplification of the invention. They do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. In the description of this invention, terms such as "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0022] like Figure 1 and Figure 2 As shown, traditional car door sealing strips typically use a single-section, uniformly structured, integral rubber extrusion. Their sealing principle relies on the elastic recovery force generated by the compression deformation of the foam tube by the door sheet metal when the door is closed. While existing door sealing strips fill the foam tube with magnetic components and utilize electromagnets for magnetic-assisted sealing, the magnetic force is applied across the entire strip without differentiating between different height areas of the door. When improved waterproof sealing performance in wading conditions is required, the sealing load on the entire sealing strip must be increased, leading to an overall increase in closing force and affecting the sound quality of opening and closing the door. Therefore, it is impossible to simultaneously achieve both waterproof performance and good sound quality when opening and closing the door.

[0023] Based on this, the present invention provides a water-sealing structure for vehicle doors, which divides the sealing strip into an upper section and a lower section along the height direction, and only strengthens the sealing of the lower section below the water level line to achieve differentiated ballast, thereby improving water-resistant performance while keeping the sound quality of opening and closing the door unaffected.

[0024] like Figure 3 and Figure 4As shown, the front door 1 and rear door 4 of the vehicle door wading sealing structure each include at least two sealing strips. Each sealing strip consists of an upper section and a lower section connected to form a closed structure. By setting a magnetic structure or connecting a pressurizing structure inside the bubble tube in the lower section of the sealing strip, the sealing ballast after the door is closed is increased, thus creating differentiated ballast between the lower and upper sections of the sealing strip. This invention divides each sealing strip into an upper section and a lower section along the height direction. The upper section maintains the same conventional ballast as the traditional structure, while the lower section achieves directional enhancement of the sealing ballast through a special structural design, thereby creating differentiated ballast between the upper and lower sections of the sealing strip.

[0025] Taking two sealing strips as an example, for the front door 1, from the outside to the inside, there are the first sealing strip 3 and the second sealing strip 2; for the rear door 4, from the outside to the inside, there are the first sealing strip 6 and the second sealing strip 5.

[0026] like Figure 3 As shown, taking the front door 1 as an example, the second sealing strip 2 of the front door is divided into the upper section 8 and the lower section 10 of the second sealing strip along the height direction; the first sealing strip 3 of the front door is divided into the upper section 9 and the lower section 11 of the first sealing strip along the height direction. The dividing line should be located above the safe setting height of the water level line under the normal wading or floating conditions of the vehicle, that is, the water surface will not exceed the dividing line when the vehicle is at the designed wading depth.

[0027] The joint ends of the upper section 9 and lower section 11 of the first sealing strip, and the joint ends of the upper section 8 and lower section 10 of the second sealing strip, are connected using a corner joint process. Each sealing strip has two corner joints to form a complete closed sealing ring. The sealing strip of the rear door 4 is treated in the same way as that of the front door 1, and will not be described again here.

[0028] Based on the above segmented structure, the present invention provides three specific implementation methods for the lower section of the sealing strip, corresponding to Embodiment 1 (permanent magnet material scheme), Embodiment 2 (electromagnet active control scheme), and Embodiment 3 (hydraulic / pneumatic boosting scheme), respectively.

[0029] Example 1: This embodiment provides a water-sealing structure for a vehicle door, which uses magnetic materials to achieve differentiated ballast on the lower section of the sealing strip. The specific structure is as follows: like Figure 3 and Figure 4As shown, this embodiment takes the front door 1 as an example, including a second front door sealing strip 2 and a first front door sealing strip 3. The second front door sealing strip 2 is installed on the side panel 7 along the circumference of the door, and the first front door sealing strip 3 is installed on the edge of the front door frame 1. The two sealing strips together fill the inner gap between the front door 1 and the side panel 7, forming a double sealing barrier. The second front door sealing strip 2 is divided into an upper section 8 and a lower section 10 along the height direction, and the first front door sealing strip 3 is divided into an upper section 9 and a lower section 11 along the height direction.

[0030] The cross-sectional structure of the upper section 8 and lower section 9 of the second sealing strip is consistent with that of the traditional sealing strip, and its bubble tube ballast is the same as the original design, ensuring that the sealing performance of the vehicle is not affected under normal driving conditions, while maintaining good door opening and closing feel and sound quality. The bubble tubes of the lower section 10 of the second sealing strip and the lower section 11 of the first sealing strip are filled with magnetic material, so that the lower section obtains additional magnetic force ballast after the door is closed, achieving differentiated sealing ballast from the upper section.

[0031] In this embodiment, the magnetic material filled in the lower section 10 of the second sealing strip and the lower section 11 of the first sealing strip can be one or more combinations of neodymium iron boron permanent magnets, ferrite permanent magnets, AlNiCo permanent magnets, or other magnetic materials with sufficient magnetic strength. Considering the temperature range of the automotive operating environment (typically -40℃ to +85℃) and corrosion resistance requirements, neodymium iron boron permanent magnets or ferrite permanent magnets with anti-corrosion surface treatment are preferred.

[0032] Magnetic materials can be filled in two ways: First, the magnetic material is processed into strip or block magnets that match the cross-section of the bubble tube's inner cavity. After the sealing strip is extruded, these magnets are embedded into the bubble tube's inner cavity and fixed by end sealing. Second, the magnetic material is mixed with a rubber matrix in powder or granule form, and a composite rubber bubble tube containing the magnetic material is directly prepared through a co-extrusion process, ensuring that the magnetic material is evenly distributed within the bubble tube wall. The former method yields higher magnetic strength, while the latter offers better process consistency; the choice can be made based on actual sealing force requirements.

[0033] The sealing enhancement principle of this embodiment is similar to the working principle of the refrigerator door sealing strip. The lower section 10 of the second sealing strip and the lower section 11 of the first sealing strip are filled with magnetic material. After the door is closed, the magnetic material is magnetically attracted to the door sheet metal or the side panel 7 sheet metal (iron component). On the basis of the elastic deformation ballast of the bubble tube itself, additional magnetic force is superimposed, thereby realizing the differentiated sealing ballast between the lower section and the upper section of the sealing strip.

[0034] It should be noted that the original structural dimensions and elastic load-bearing performance of the bubble tubes of the lower section 10 of the second sealing strip and the lower section 11 of the first sealing strip remain unchanged: the rubber hardness, wall thickness, cross-sectional shape and size of the bubble tubes are consistent with those of the upper section 8 of the second sealing strip and the lower section 9 of the second sealing strip. The addition of magnetic material does not change the structural parameters and elastic deformation characteristics of the bubble tube body, so as to ensure the continuity of the sealing strip in the extrusion process.

[0035] After the door is closed, the bubble tubes of the lower section 10 of the second sealing strip and the lower section 11 of the first sealing strip come into contact with the door sheet metal or side panel sheet metal 7 and undergo compression deformation, forming a basic ballast F0 generated by the elastic restoring force of the bubble tube itself. This basic ballast is the same as the ballast of the upper section 8 and the lower section 9 of the second sealing strip. At the same time, the magnetic material inside the bubble tube generates magnetic attraction with the door sheet metal or side panel sheet metal 7, forming an additional magnetic force F. m The actual combined sealing load of the lower section 10 of the second sealing strip and the lower section 11 of the first sealing strip is F0 + F. m The ballast F0 formed by the elastic recovery force of the bubble tube alone is greater than that of the upper section 8 and the lower section 9 of the second sealing strip, thus achieving differentiated sealing performance between the upper and lower sections.

[0036] During the opening and closing of the door, the magnetic material constantly generates a magnetic force, which must be overcome when opening the door. m The door can only be opened when the sum of the elastic restoring force F0 of the foam tube is reached. Therefore, the permanent magnet material solution in this embodiment is suitable for applications where the opening and closing force requirements are not high or the magnetic force design value is relatively small.

[0037] To reduce the operating force when opening the door, the following measures can be taken: First, control the magnetic strength of the permanent magnet, so that F m Within an appropriate range, minimize the opening resistance while meeting water-sealing requirements; secondly, optimize the installation position of the permanent magnet so that its magnetic force decays rapidly in the initial stage of opening (the instant the bubble tube separates from the sheet metal), reducing the peak opening force; thirdly, in the cross-sectional design of the lower section of the bubble tube of the sealing strip, appropriately reduce the rubber wall thickness of the bubble tube to reduce the foundation ballast F0, so that the comprehensive ballast F0+F m The proportion of magnetic force contribution increases, thereby achieving enhanced sealing through magnetic force without increasing the opening force.

[0038] This embodiment achieves the following effects by filling the lower section of the sealing strip with magnetic material: First, the lower section of the sealing strip obtains a significantly greater overall sealing ballast (F0+F) than the upper section of the sealing strip after the door is closed. mFirst, it effectively improves the waterproof sealing performance of the door below the water level under wading conditions, resisting the intrusion of water pressure on the door seal. Second, the upper section of the sealing strip maintains the conventional structure and ballast, and the contribution of the upper sealing strip to the closing force when opening and closing the door is consistent with the traditional solution, so the overall sound quality of opening and closing the door is not affected. Third, the magnetic material does not require any external controller, sensor or electrical wiring harness, has a simple structure and low manufacturing cost, and is suitable for mass engineering applications. Fourth, the magnetic force of the magnetic material is not affected by the vehicle's electrical system failure, and can still maintain the sealing reinforcement function under extreme conditions such as power failure, with a high functional safety margin.

[0039] Example 2: This embodiment provides a water-sealing structure for a vehicle door, which uses an electromagnet and active control logic to achieve differentiated ballast on the lower section of the sealing strip. The specific structure is as follows: like Figure 3 and Figure 4 As shown, electromagnet components are installed inside the bubble tubes of the lower section 10 of the second sealing strip and the lower section 11 of the first sealing strip. The electromagnet can be a solenoid electromagnet or an E-type iron core electromagnet. The iron core material is a soft magnetic material with high permeability and low coercivity (such as electrical pure iron, silicon steel, etc.). The coil winding is made of enameled copper wire and is encapsulated with oil-resistant and heat-resistant insulating material to meet the requirements of the automotive environment for waterproofing, vibration resistance and temperature resistance.

[0040] Electromagnets are evenly distributed along the length of the lower section 10 of the second sealing strip and the lower section 11 of the first sealing strip. The spacing between adjacent electromagnets is determined based on the length of the lower section of the sealing strip and the required uniformity of magnetic force distribution. After each electromagnet is connected by a wire, it is led out through a waterproof connector at the corner of the sealing strip, connected to the vehicle body wiring harness, and finally connected to the body control module (BCM). In this embodiment, a waterproof connector is selected. The wiring harness is laid along the sheet metal fold of the inner door panel and can be protected by a waterproof corrugated pipe. It is led out through the wiring harness channel built into the door hinge to the vehicle body, avoiding the wiring harness from being exposed in the inner gap between the inner and outer door panels.

[0041] The control system in this embodiment includes a body control module (BCM), a door lock status sensor, a wading depth sensor, an electromagnet drive circuit, and related wiring harnesses. The BCM acquires signals from the door lock status sensor (door open / closed / locked status) and the wading depth sensor (current wading depth or wading mode activation status) in real time, and sends power-on or power-off commands to the electromagnet drive circuit according to a preset control strategy. The electromagnet drive circuit uses a power MOSFET or relay to control the on / off current of the electromagnet coil, and is equipped with a current detection circuit to monitor the electromagnet's operating status in real time to achieve fault diagnosis. The electromagnet drive circuit and the current detection circuit are existing technologies and will not be described in detail here.

[0042] The electromagnet control logic in this embodiment has two working states: normal mode and wading mode, as detailed below: (1) Door closing procedure in normal mode: The prerequisite is that the door is in the open state, the electromagnet is in the de-energized state, and the lower section of the sealing strip is in the normal ballast state (only the elastic restoring force F0 of the bubble tube). When the door is closed, the bubble tube of the sealing strip begins to contact and compress the corresponding sheet metal; the door moves to the closed position, the door lock tongue engages with the latch, and the door lock signal is transmitted to the body controller; after receiving the door lock signal, the body controller sends an energizing command to the electromagnet drive circuit after a set delay time T1 (usually 0.5s~2s, used to confirm that the door is completely closed and the sealing strip has been fully compressed); when the electromagnet is energized, the lower section 10 of the second sealing strip, the lower section 11 of the first sealing strip and the corresponding door sheet metal or side panel 7 sheet metal are magnetically attracted F. m The overall sealing ballast of the lower section of the sealing strip increases to F0+F. m The sealing and reinforcement effect is effective.

[0043] (2) Door opening procedure in normal mode: The prerequisites are that the door is closed and locked, the electromagnet is energized, and the lower section of the sealing strip is in a reinforced ballast state (F0+F). m When the door is opened (by pulling the inner / outer door handle), the door lock unlock signal is transmitted to the body controller. Upon receiving the door lock unlock signal, the body controller immediately (or within a very short delay, usually no more than 100ms) sends a power-off command to the electromagnet drive circuit. With the electromagnet de-energized, the magnetic force F between the lower section of the sealing strip and the sheet metal... m The seal disappears, and the lower section of the sealing strip returns to the normal ballast state relying solely on the elastic restoring force F0 of the bubble tube; then the door lock unlocking mechanism activates, and the door can be opened normally; since the additional magnetic force has been removed before opening the door, the door only needs to overcome the elastic restoring force F0 of the bubble tube when opening, and the opening force is consistent with the traditional solution, so the sound quality of opening and closing the door is not affected.

[0044] (3) Control logic in wading mode: When the vehicle enters the wading condition, the wading depth sensor detects a wading signal (water depth exceeds the set threshold), or the driver actively activates the wading mode switch. After receiving the wading signal, the body controller immediately sends a power-on command to the electromagnets of each door, regardless of the current state of the door. The sealing enhancement function is automatically activated without manual operation by the driver. During the wading mode activation, even if the door is briefly opened (such as when passengers get in or out), the electromagnets are de-energized according to the above door opening procedure before the door is opened to ensure that the sound quality of the door opening and closing is not affected. After the door is closed and locked again, the electromagnets are energized again, and the sealing enhancement function is restored. When the vehicle leaves the wading area and the wading signal disappears, the body controller can close the wading mode according to a preset strategy (such as delayed exit or manual exit), and the electromagnets return to the normal mode control logic.

[0045] This embodiment utilizes the elastic deformation ballast of the original sealing strip combined with the magnetic force of the electromagnet and the sheet metal to achieve seal reinforcement. Through the combination of the electromagnet and active control logic, the following technical effects are achieved: First, the lower section of the sealing strip is actively activated by the body controller to reinforce the seal after the door is closed, resulting in a combined sealing ballast of F0+F. m The first feature is that the ballast load F0 of the upper section is greater than that of the upper section, which greatly improves the water resistance performance. The second feature is that the electromagnet is disconnected before the door is opened, and the additional magnetic force is completely removed, so the sound quality of opening and closing the door is not affected. The third feature is that it is linked with the water wading sensor to realize automatic sealing enhancement under water wading conditions, which has a high degree of active safety. The fourth feature is that the on / off status of the electromagnet can be monitored in real time by the body controller, which has fault diagnosis capability and helps to improve the reliability of the system.

[0046] Example 3: This embodiment provides a water-sealing structure for a vehicle door, which uses hydraulic or pneumatic pressurization to achieve differentiated ballast on the lower section of the sealing strip. The specific structure is as follows: like Figure 3 and Figure 4 As shown, the pressurization structure in this embodiment includes a miniature hydraulic pump (or pneumatic pump), a liquid storage chamber (or air tank), a hose, a lower section connector of the sealing strip, a proportional valve (or solenoid valve), a pressure sensor, and a controller. The bubble tubes of the lower section 10 of the second sealing strip and the lower section 11 of the first sealing strip are sealed elastic chambers, which are connected to the hose through a connector installed at the end or middle of the lower section of the sealing strip. The hose is connected to the hydraulic pump / pneumatic pump installed inside the door hinge or in the hinge support after passing through the internal wiring of the door.

[0047] In this embodiment, a hydraulic pump or pneumatic pump is embedded inside the door hinge or in the hinge support. The hinge serves as a fixing bracket and wiring channel. The air / oil circuit passes through the hinge's central hole into the door interior and connects to the flexible hose of the lower section of the sealing strip connector, achieving a neat arrangement without exposed pipelines. The lower section of the sealing strip connector is a quick-connect waterproof connector, installed at the end or middle of the lower section 10 of the second sealing strip and the lower section 11 of the first sealing strip. The connector body is made of oil-resistant and heat-resistant engineering plastic, and the sealing ring is made of fluororubber to ensure the sealing reliability of the connector under high-pressure conditions.

[0048] Install a proportional valve or solenoid valve at the joint to precisely control the internal pressure of the bubble tube: the proportional valve can achieve continuous pressure adjustment and is suitable for high-end applications that require dynamic adjustment of the sealing force according to the wading depth; the solenoid valve has a simple structure and low cost and is suitable for basic applications that only require two-state control (on / off).

[0049] The sealing enhancement principle of this embodiment is as follows: The hydraulic / pneumatic solution increases the internal ballast of the bubble tube by injecting hydraulic oil or compressed gas into it, thereby increasing the internal pressure and causing the bubble tube to expand. This increases the contact area and pressure between the bubble tube and the sheet metal, thus improving the sealing performance. After being pressurized, the bubble tube expands in volume, increasing the contact width with the sheet metal and significantly increasing the contact pressure, effectively resisting the hydrostatic pressure under water-related conditions.

[0050] Furthermore, the working principle of the pneumatic drive scheme in this embodiment is as follows: The pneumatic drive system uses a miniature pneumatic pump as the booster source, combined with a solenoid valve and pressure sensor to achieve precise control of the air pressure inside the bubble tube. The depressurization process during door opening is as follows: Upon execution of the door opening action, the door lock unlock signal is transmitted to the controller; the controller immediately sends a depressurization command to the solenoid valve, which opens the depressurization channel, allowing the compressed gas inside the bubble tube to be discharged through the depressurization channel, and the pressure inside the bubble tube rapidly drops to atmospheric pressure or a slight negative pressure; after the pressure inside the bubble tube decreases, the contact tension between the bubble tube and the sheet metal returns to the normal elastic restoring force level, and the lower section of the sealing strip is in a relaxed, low-load state; subsequently, the door opens normally, and the sound quality of opening and closing the door is unaffected.

[0051] The inflation process during the door closing is as follows: when the door is closed, the door moves to the closed position and the door lock signal is transmitted to the controller; after a set delay T1, the controller sends an inflation command to the air pump and the solenoid valve; the air pump starts and injects compressed gas into the bubble tubes of the lower section 10 of the second sealing strip and the lower section 11 of the first sealing strip through the hose; the air pressure in the bubble tube gradually increases, the volume of the bubble tube expands, and the contact area and contact pressure between the bubble tube and the sheet metal increase simultaneously.

[0052] The pressure sensor monitors the air pressure inside the bubble tube in real time. When the air pressure reaches the set working pressure P, s Afterwards, the controller sends a stop command to the air pump, and the solenoid valve switches to the pressure holding state to maintain a constant air pressure in the bubble tube. After the vehicle is locked, the accumulator (small gas accumulator) maintains a constant air pressure in the bubble tube to compensate for pressure loss caused by temperature changes or minor leaks, ensuring that the lower section of the sealing strip maintains a high-pressure expansion state during long-term parking, and that the waterproof sealing performance remains effective.

[0053] Furthermore, the working principle of the hydraulic drive scheme in this embodiment is as follows: The hydraulic drive system uses a miniature hydraulic pump as the booster source and hydraulic oil as the working medium, in conjunction with a proportional solenoid valve and an accumulator to achieve precise control of the hydraulic pressure within the bubble tube. The hydraulic system's working cycle is as follows: When the door is opened, the controller sends a full-open command to the proportional solenoid valve, which fully opens the return oil channel. Driven by the elastic restoring force of the bubble tube, the hydraulic oil in the bubble tube flows back to the oil reservoir, reducing the hydraulic pressure to near zero. The bubble tube is in a naturally relaxed state, and the contact pressure between it and the sheet metal is only the elastic restoring force of the bubble tube rubber itself. The lower section of the sealing strip is under low load, allowing the door to open easily. When the door is closed, the door lock signal triggers the controller, which sends a pressurization command to the hydraulic pump and the proportional valve. The hydraulic pump starts, injecting a measured amount of hydraulic oil into the bubble tube. The hydraulic pressure in the bubble tube gradually increases, causing the bubble tube to expand and increasing the contact tension with the sheet metal. When the hydraulic pressure reaches the set working pressure P... h Afterwards, the controller commands the hydraulic pump to stop, the proportional valve switches to the pressure holding position, and the accumulator maintains a constant system hydraulic pressure; after the vehicle is locked, the accumulator continues to compensate for system pressure loss, the bubble tube remains in a high-pressure expansion state, and the sealing performance continues to be enhanced.

[0054] Compared to pneumatic solutions, hydraulic solutions offer faster pressure build-up, higher pressure stability, and eliminate the pressure instability issues caused by gas compressibility, making them suitable for applications requiring higher sealing precision.

[0055] This embodiment achieves the following technical effects through hydraulic / pneumatic pressurization: First, the lower section of the sealing strip expands after pressurization, significantly increasing the contact area and pressure with the sheet metal. This results in superior sealing performance compared to traditional solutions that rely solely on the elastic deformation of the sealing strip, making it particularly suitable for amphibious vehicles with extremely high requirements for water sealing performance. Second, the internal pressure of the sealing strip is reduced to atmospheric pressure before opening the door through a depressurization / oil return operation, without affecting the sound quality of opening and closing the door. Third, the sealing force of the hydraulic / pneumatic solution can be continuously adjusted by regulating the working pressure, facilitating precise matching for different wading depths and water pressure conditions. Fourth, the hydraulic / pneumatic pump and piping system are embedded inside the door hinge, with no exposed pipelines, ensuring a clean and reliable appearance without affecting the aesthetics of the door interior.

[0056] Example 4: This embodiment provides a vehicle equipped with the water-sealing structure for the vehicle door described in Embodiment 1, Embodiment 2, or Embodiment 3.

[0057] The vehicle in this embodiment includes a vehicle body, a front door 1, a rear door 4, and a side panel 7. Both the front door 1 and the rear door 4 are hinged to the side panel 7 via door hinges, allowing them to rotate around the hinge axis to open and close. Both the front door 1 and the rear door 4 are equipped with a water-sealing structure. Each door is equipped with a first sealing strip and a second sealing strip arranged sequentially from the outside to the inside, namely, a first sealing strip 3 and a second sealing strip 2 for the front door, and a first sealing strip 6 and a second sealing strip 5 for the rear door, forming a double-seal layout to further improve overall waterproof reliability.

[0058] like Figure 2 As shown, the second sealing strip is installed around the door opening of side panel 7, mainly serving as the primary seal between the door and the vehicle body; the first sealing strip is installed on the outer door panel, mainly serving as an auxiliary seal and sound insulation function. Both sealing strips adopt a segmented structure, that is, they are divided into an upper section and a lower section. The lower section adopts sealing reinforcement measures to form a dual-layer differentiated ballast sealing structure, which constitutes two independent waterproof barriers under wading conditions, reducing the risk of water ingress.

[0059] The segmentation scheme for the sealing strips of the front door 1 and the rear door 4 is as follows: the second sealing strip 2 of the front door is divided into an upper section 8 and a lower section 10; the first sealing strip 3 of the front door is divided into an upper section 9 and a lower section 11. The dividing height between the upper and lower sections of the front door sealing strip is determined according to the wading design water level line of the vehicle's front door, ensuring that the lower section of the sealing strip below the dividing line is completely submerged below the water surface and withstands the wading water pressure at the design wading depth, while the upper section of the sealing strip above the dividing line is always above the water surface and does not need to withstand water pressure.

[0060] The sealing strip of the rear door 4 is segmented in the same way as that of the front door 1, that is, the second sealing strip 5 of the rear door is divided into the upper section 8 and the lower section 10 of the second sealing strip, and the first sealing strip 6 of the rear door is divided into the upper section 9 and the lower section 11 of the first sealing strip. The dividing height of the sealing strips of the front and rear doors can be kept consistent, or they can be set separately according to the geometric differences between the front and rear doors.

[0061] The lower section of the sealing strips of the front door 1 and the rear door 4 can adopt the same reinforcement method, or different solutions can be adopted according to the structural characteristics and cost requirements of the front door 1 and the rear door 4. For example, the front door 1 has higher requirements for the sound quality of opening and closing the door, so the electromagnet solution of embodiment 2 or the hydraulic / pneumatic solution of embodiment 3 can be preferred; the rear door 4 is used at a relatively low frequency, so the magnetic material solution of embodiment 1 with a simpler structure can be adopted.

[0062] In this embodiment, when both the front door 1 and the rear door 4 adopt the electromagnet solution of Embodiment 2 or the hydraulic / pneumatic solution of Embodiment 3, the architecture of the vehicle wading sealing control system is as follows: The system is managed centrally by the Body Controller (BCM), which communicates with each subsystem via a CAN bus. Input signals include: front door lock status signals, rear door lock status signals, wading depth sensor signals (installed on the bottom of the vehicle body, typically using an ultrasonic or capacitive level sensor), wading mode switch signals (installed on the center console), vehicle speed signals, and vehicle attitude signals (used to determine whether the vehicle is floating in water).

[0063] Output control includes: power on / off control of the lower section electromagnet (or hydraulic pump / pneumatic pump) of the front door sealing strip, power on / off control of the lower section electromagnet (or hydraulic pump / pneumatic pump) of the rear door sealing strip, and instrument display and fault alarm of the sealing system working status.

[0064] The vehicle's wading sealing control system operates in the following three modes: In normal driving mode, the vehicle drives normally on non-water-bound roads. The wading depth sensor does not send a wading signal, the wading mode switch is not activated, and the lower section of the sealing strip automatically gains enhanced sealing after the door is closed and automatically depressurizes before the door is opened, balancing sealing performance and door opening / closing quality.

[0065] In wading driving mode, when the vehicle enters a flooded area, the wading depth sensor detects a wading signal, or the driver actively activates the wading mode switch. The vehicle body controller then enters wading driving mode and sends a sealing reinforcement command to the lower section of all door seals. All lower sections of door seals are in a maximum sealing ballast state, forming a tight water-proof barrier for the entire vehicle.

[0066] In floating / navigating mode, the vehicle enters a floating or water-navigating state. The vehicle attitude sensor detects that the vehicle is off the ground and floating on the water surface. The body controller enters floating / navigating mode and sends a maximum sealing reinforcement command to the lower section of all door seals. At the same time, it activates other waterproof systems of the vehicle to form a comprehensive waterproof sealing system for the entire vehicle.

[0067] In this embodiment, each door is equipped with a first sealing strip and a second sealing strip. The lower sections of both sealing strips are reinforced with a seal, forming a series of double-layer waterproof barriers. Under wading conditions, water pressure first acts on the lower section 10 of the second sealing strip on the outer side of the door. The lower section 10 of the second sealing strip, under the reinforced seal, generates a contact pressure greater than the water pressure, forming the first waterproof barrier and preventing most water from entering the gap between the door and the side panel. Even if the first waterproof barrier experiences minor leakage, the water that seeps into the gap will be intercepted by the lower section 11 of the first sealing strip. The lower section 11 of the first sealing strip, also under the reinforced seal, forms the second waterproof barrier, further preventing water from entering the vehicle interior. The double-sealing waterproof structure improves the overall vehicle's waterproof reliability under wading conditions and reduces the risk of water ingress due to partial failure of a single sealing strip. The double sealing strips of the rear door 4 are the same as those of the front door 1, and will not be described further here.

[0068] This embodiment achieves the following technical effects by installing a water-sealing structure on the front door 1 and the rear door 4: First, both the front door 1 and the rear door 4 are equipped with double-segmented sealing strips, forming four independent waterproof barriers (two on the front door and two on the rear door) under water-wading conditions, improving the overall vehicle's water-wading reliability; Second, the vehicle's water-wading sealing control system is linked with multiple sources of signals such as water-wading sensors, vehicle speed signals, and vehicle attitude signals to achieve intelligent and automated control of the water-wading sealing function, improving active safety; Third, the sealing enhancement function is activated as needed under non-water-wading conditions, without affecting the sound quality and ease of operation when opening and closing the doors in daily use.

[0069] All the above embodiments can achieve a significantly greater sealing load on the lower section of the sealing strip after the door is closed than on the upper section, effectively enhancing the waterproof seal in the area below the water level when the vehicle is wading through water, while the upper section of the sealing strip above the water level always maintains the normal ballast load, and the sound quality of opening and closing the door is not affected in any way.

[0070] Those skilled in the art will understand that the specific parameters in the above embodiments (such as permanent magnet specifications, electromagnet coil parameters, hydraulic / pneumatic working pressure, control delay time, etc.) can be adjusted according to the engineering requirements of specific vehicle models, and do not constitute a limitation on the scope of protection of this invention.

[0071] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A water-sealing structure for a vehicle door, characterized in that, It includes at least two sealing strips, wherein the sealing strips are connected by an upper section and a lower section to form a closed structure; the bubble tube in the lower section of the sealing strip has a magnetic structure inside, which can increase the sealing pressure after the door is closed, so that the lower section and the upper section of the sealing strip form a differentiated pressure.

2. A water-sealing structure for a vehicle door, characterized in that, It includes at least two sealing strips, wherein the sealing strips are connected by an upper section and a lower section to form a closed structure; the bubble tube in the lower section of the sealing strip is connected to a pressurizing structure, which can increase the sealing ballast after the door is closed, so that the lower section and the upper section of the sealing strip form a differentiated ballast.

3. The water-sealing structure for a vehicle door according to claim 1, characterized in that, The magnetic structure is made of magnetic material.

4. The water-sealing structure for a vehicle door according to claim 1, characterized in that, The magnetic structure is an electromagnet, which is used to energize the door for a set time after it is closed.

5. The water-sealing structure for a vehicle door according to claim 4, characterized in that, The control circuit of the electromagnet is connected to a controller, which is used to control the electromagnet to be energized according to the water wading signal.

6. The water-sealing structure for a vehicle door according to claim 2, characterized in that, The pressurization structure uses a hydraulic pump or a pneumatic pump, which is connected to the connector at the lower end of the sealing strip via a hose.

7. The water-sealing structure for a vehicle door according to claim 6, characterized in that, The connector is fitted with a proportional valve or a solenoid valve.

8. A water-sealing structure for a vehicle door according to claim 1 or 2, characterized in that, The junction of the upper and lower sections of the sealing strip is located above the water level line.

9. A vehicle, characterized in that, The vehicle includes a front door and a rear door, both of which are equipped with a water-sealing structure as described in any one of claims 1-8.

10. A vehicle according to claim 9, characterized in that, Both the front and rear doors are equipped with a first sealing strip and a second sealing strip arranged sequentially from the outside to the inside.

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