Lower frame automatic lifting door

Abstract

The invention relates to a lower frame automatic lifting door which comprises a door frame and a door leaf and further comprises a transmission assembly, the transmission assembly can bear acting force and move in the horizontal direction when the door leaf is closed, and the transmission assembly can relieve the acting force and reset in the horizontal direction when the door leaf is opened. The driving assembly is connected with the transmission assembly, and when the transmission assembly moves or resets, the driving assembly is driven to rotate; and the lower frame assembly is connected with the driving assembly, and the driving assembly drives the lower frame assembly to descend or ascend when rotating. The problem that an existing door with a lifting structure cannot achieve automatic lifting of a lower frame assembly when the door is opened and closed can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of doors used in conjunction with buildings, and particularly to a bottom frame automatic lifting door. Background Art

[0002] At present, threshold-free designs are widely adopted for rooms in buildings to facilitate the entry and exit of people. However, due to the gap between the bottom of the door and the ground, external noise and harmful substances are easily penetrated, resulting in poor sound insulation and smoke barrier effects in the room, seriously affecting the indoor comfort and safety. Therefore, doors with liftable bottoms are often used to improve the airtightness inside threshold-free rooms.

[0003] In existing bottom liftable doors, the lifting components are usually integrated inside the door body. However, the adjustment process depends on manual operation, that is, the lifting components need to be manually lowered when the door is closed and manually raised when the door is opened. Therefore, it is impossible to automatically complete the lifting of the bottom frame assembly when the door is opened and closed.

[0004] In view of this, providing a bottom frame automatic lifting door to ensure that the bottom frame assembly automatically rises when the door is opened and automatically descends when the door is closed is an urgent problem to be solved at present. Summary of the Invention

[0005] Based on the foregoing analysis, the main object of the present invention is to provide a bottom frame automatic lifting door to solve the problem that the existing doors with lifting structures cannot automatically lift the bottom frame assembly when the door is opened and closed.

[0006] To solve the foregoing technical problems, the bottom frame automatic lifting door of the present invention includes: a door frame and a door leaf, and further includes: a transmission assembly, which can be subjected to a force and move horizontally when the door leaf is closed, and can be released from the force and reset horizontally when the door leaf is opened; a driving assembly, which is connected to the transmission assembly, and the driving assembly rotates when the transmission assembly moves or resets; a bottom frame assembly, which is connected to the driving assembly, and the driving assembly drives the bottom frame assembly to descend or ascend when it rotates.

[0007] Preferably, the transmission assembly includes: a spring, a rack, and a rack fixing plate; the first end of the spring is fixed to the rack, and the second end is fixed to the rack fixing plate; the rack can be subjected to a force when the door leaf is closed and move along the rack fixing plate, deforming the spring, and it can be released from the force when the door leaf is opened and receive the resilience of the spring to reset along the rack fixing plate.

[0008] As a further preference, a first guiding groove is provided at the first end of the rack, and a spring fixing post is also provided on the rack; corresponding to the position of the first guiding groove, a first guiding post is provided at the first end of the rack fixing plate, and the first guiding post is located within the first guiding groove; the first end of the spring is fixed to the rack through the spring fixing post, and the second end of the spring is fixed to the rack fixing plate through the first guiding post.

[0009] As a further preference, a second guiding groove is provided at the second end of the rack; corresponding to the position of the second guiding groove, a second guiding post is provided at the second end of the rack fixing plate, and the second guiding post is located within the second guiding groove.

[0010] As a further preference, the end of the rack at the end that is subjected to a force when the door leaf is closed is arc-shaped; or a roller is provided at the end of the rack at the end that is subjected to a force when the door leaf is closed.

[0011] As a further preference, the drive assembly includes a bearing, a stud, and a gear; the bearing is tightly connected to the gear so that the gear can only rotate in the horizontal direction; the stud is connected to the gear by screws, or the stud is connected to the gear by welding, or the stud and the gear are integrally machined; the teeth of the gear mesh with the rack so that when the rack moves or resets, it can drive the gear to rotate, thereby driving the stud to rotate to drive the lower frame assembly to descend or ascend.

[0012] As a further preference, the lower frame assembly includes a lower frame body, a nut fixing plate, and a nut; the nut fixing plate is connected to the lower frame body, and the nut is fixed on the nut fixing plate; the nut is in threaded cooperation with the stud, and when the stud rotates, the nut is loosened or locked to drive the nut to drive the lower frame body to descend or ascend along the axial direction of the stud.

[0013] As a preference, a soundproof board is installed at the ground corresponding to the lower frame body, and / or a soundproof board is installed near the ground corresponding to the lower frame body.

[0014] As a preference, it further includes an assembly housing; the assembly housing is integrated at the bottom of the door leaf, and the assembly housing houses the transmission assembly, the drive assembly, and the lower frame assembly.

[0015] As a preference, a lock core, a handle, an intelligent screen, and a door lock control device are further provided on the door leaf; the lock core, the handle, and the intelligent screen are all electrically connected to the door lock control device; a hinge is installed between the door frame and the door leaf to enable the door leaf to open or close relative to the door frame; a sealing strip is installed between the door frame and the door leaf.

[0016] An automatic lifting door for the lower frame of the present invention has the following beneficial effects: 1. When the door leaf is closed, the door frame provides a force towards the door leaf to the transmission component, prompting it to move horizontally. When the transmission component moves horizontally, it continuously drives the driving component to rotate in the same direction, so as to drive the lower frame component to descend to the bottom and contact the ground, which can effectively block external noise and harmful substances from entering.

[0017] 2. When the door leaf is opened, the transmission component gradually disengages from the force of the door frame and, under the action of the reset mechanism, horizontally resets in the direction away from the door leaf. By continuously driving the driving component to rotate in the direction opposite to that when the door leaf is closed, it drives the lower frame component to rise away from the ground to avoid friction between the lower frame and the ground affecting the opening of the door.

[0018] 3. For the automatic lifting door of the lower frame of the present invention, when the door leaf is closed and opened, through the cooperation of the door leaf, the door frame and the transmission component, and through the drive of the transmission component and the driving component, the lower frame component automatically descends and automatically rises. Different from the prior art which requires personnel to manually adjust the rise or fall of the lifting components inside the door, and there is no need for additional manual or electric operations. The automatic lifting of the lower frame component can be achieved by opening and closing the door leaf. Description of the Drawings

[0019] Figure 1 is a front view schematic diagram of the automatic lifting door for the lower frame according to an embodiment of the present invention; Figure 2 is a partial front view structural schematic diagram of the automatic lifting door for the lower frame according to an embodiment of the present invention; Figure 3 is a side view schematic diagram of the automatic lifting door for the lower frame according to an embodiment of the present invention; Figure 4 is a partial side view structural schematic diagram of the automatic lifting door for the lower frame according to an embodiment of the present invention; Figure 5 is a top view schematic diagram of the transmission component according to an embodiment of the present invention; Figure 6 is a top view schematic diagram when the door leaf is opened according to an embodiment of the present invention; Figure 7 is a top view schematic diagram when the door leaf is closed according to an embodiment of the present invention.

[0020] The reference signs in the drawings are indicated as follows: 11. Rack, 111. First guiding groove, 112. Second guiding groove, 113. Spring fixing post, 12. Rack fixing plate, 121. First guiding post, 122. Second guiding post, 13. Spring; 21. Gear, 22. Stud, 23. Bearing; 31. Nut, 32. Lower frame main body, 33. Nut fixing plate, 34. Sound insulation plate; 4. Component housing, 41. Bearing fixing plate, 42. Transmission fixing plate; 5. Door leaf, 51. Lock cylinder, 52. Handle, 53. Intelligent screen, 6. Door frame, 7. Hinge, 8. Sealing strip. Specific embodiments

[0021] The present invention will be described in more detail below with reference to the accompanying drawings. It should be noted that the description of the present invention with reference to the accompanying drawings below is illustrative only and not restrictive.

[0022] Where possible, the various different embodiments described below can be recombined with each other to form other embodiments not shown in the following description; the various different technical features described below can also be recombined with each other to form other embodiments not shown in the following description.

[0023] Please refer to the attached Figures 1 to 7 .

[0024] Embodiment 1 To solve the problem that the existing door with a lifting structure cannot realize the automatic lifting of the lower frame assembly when opening and closing the door, this embodiment provides an automatically lifting lower frame door. On the basis of having a door frame 6 and a door leaf 5, it further includes: a transmission assembly, which can be subjected to a force and move horizontally when the door leaf 5 is closed, and can be released from the force and reset horizontally when the door leaf 5 is opened; a driving assembly, which is connected to the transmission assembly, and the driving assembly rotates when the transmission assembly moves or resets; a lower frame assembly, which is connected to the driving assembly, and the lower frame assembly descends or ascends when the driving assembly rotates.

[0025] When the door leaf 5 opens relative to the door frame 6 and gradually closes, after one end of the transmission assembly contacts the door frame 6, it will be subjected to an external force provided by the door frame 6, and during the closing process, the external force gradually increases, prompting the transmission assembly to move horizontally towards the door leaf 5; since the driving assembly is connected to the transmission assembly, the movement of the transmission assembly will drive the driving assembly to rotate horizontally; since the lower frame assembly is connected to the driving assembly, the rotation of the driving assembly can drive the lower frame assembly to descend, that is, the driving assembly drives the lower frame assembly to descend along the axis of the driving assembly, effectively blocking external noise and harmful substances from entering, until the other end of the transmission assembly is in full contact with the inside of the door leaf 5, at which time the door leaf 5 is completely closed relative to the door frame 6.

[0026] When the door leaf 5 is closed relative to the door frame 6 and gradually opens, one end of the transmission assembly gradually moves away from the door frame 6, and the external force brought by the door frame 6 is gradually released. At this time, under the action of the self-resetting mechanism of the transmission assembly, the transmission assembly gradually resets in the direction away from the door leaf 5, and drives the driving assembly to rotate in the opposite direction to when the door leaf is closed. When the driving assembly rotates in the opposite direction, it drives the lower frame assembly to rise along the axial direction of the driving assembly and gradually move away from the ground, so as to avoid the friction between the lower frame and the ground and affect the opening of the door.

[0027] When the door leaf 5 opens and closes, the transmission assembly, the door leaf 5, and the door frame 6 cooperate closely, and at the same time, the internal components of the lifting assembly cooperate with each other, realizing that when the door leaf 5 opens, the lower frame assembly at the bottom automatically rises, and when the door leaf 5 closes, the lower frame assembly at the bottom automatically descends. Different from the prior art that requires personnel to manually adjust the rise or fall of the lifting components inside the door, nor is it necessary for additional manual or electric operations. By realizing the opening and closing of the door leaf, the automatic lifting of the lower frame assembly can be achieved.

[0028] Embodiment 2 This embodiment is a further refinement and improvement of the transmission assembly on the basis of Embodiment 1.

[0029] Specifically, the transmission assembly includes a spring 13, a rack 11, and a rack fixing plate 12. The first end of the spring 13 is fixed to the rack 11, and the second end is fixed to the rack fixing plate 12. The rack 11 can be subjected to a force when the door leaf 5 is closed and move along the rack fixing plate 12, causing the spring 13 to deform. And it can be released from the force when the door leaf 5 is opened and receive the resilience of the spring 13 to reset along the rack fixing plate 12. In this embodiment, the transmission assembly adopts a combined structure of the rack 11, the rack fixing plate 12, and the spring 13, in which the movement is transmitted between the rack 11 and the driving assembly. And one end of the rack 11 can be subjected to an external force, such as being pushed by the door frame 6, so as to have a horizontal displacement in the direction of the other end. At this time, the spring 13 generates compression or tensile deformation according to the installation method for storing the reset energy; when the external force is removed, the spring 13 drives the rack 11 to reset along the original path by its own elastic restoring force, return to the initial position, and act on the driving assembly again during this process, causing it to rotate in the reverse direction, thereby driving the lower frame assembly to rise. In this structure, the spring 13 not only plays a reset function, but also can adjust its stiffness coefficient according to the design to adapt to different response sensitivity requirements.

[0030] In order to ensure the stability and alignment accuracy of the rack 11 during the movement and avoid offset resulting in transmission failure, in a more specific embodiment, a guiding structure, such as a chute or a guide rail, can be selected between the rack 11 and the rack fixing plate 12. Specifically, it can be: The first end of the rack 11 is provided with a first guiding groove 111, and the rack 11 is also provided with a spring fixing post 113; corresponding to the position of the first guiding groove 111, the first end of the rack fixing plate 12 is provided with a first guiding post 121, and the first guiding post 121 is located within the first guiding groove 111; the first end of the spring 13 is fixed to the rack 11 through the spring fixing post 113, and the second end of the spring 13 is fixed to the rack fixing plate 12 through the first guiding post 121. In this embodiment, when the second end of the spring 13 is fixed to the first guiding post 121 and the first end is connected to the spring fixing post 113 on the rack 11, the rack 11 moves towards the second end under an external force, at this time the spring 13 is compressed and stores the compression deformation energy; when the external force is removed, the spring 13 relies on the compression restoring force to push the rack 11 to reset in the direction of the first end.

[0031] In this embodiment, in order to further ensure the stability and alignment accuracy of the rack 11 during the movement process, and to avoid transmission failure caused by deviation, a second guiding groove 112 can also be provided at the second end of the rack 11. Corresponding to the position of the second guiding groove 112, the second end of the rack fixing plate 12 is provided with a second guiding post 122, and the second guiding post 122 is located within the second guiding groove 112. The second end of the spring 13 can be fixed to the rack fixing plate 12 through the second guiding post 122, and the first end is still fixed to the rack 11 through the spring fixing post 113. At this time, when the rack 11 is subjected to an external force and moves towards the first end, the spring 13 is stretched and generates tensile deformation. After the external force is released, the spring 13 pulls the rack 11 to reset to the initial position through the tensile restoring force. The matching structures of the first guiding groove 111 and the first guiding post 121, and the second guiding groove 112 and the second guiding post 122 are mainly used to guide the rack 11 to slide precisely along the set path, prevent it from deviating or jamming during the horizontal movement process, and ensure the stability and repeatability of the transmission process. The guiding post is embedded in the guiding groove and slides synchronously with the movement of the rack 11, which not only plays a role in limiting and guiding, but also enhances the overall rigidity of the structure, and avoids component wear or failure caused by uneven external forces.

[0032] In order to improve the overall transmission performance and operation reliability, in a more specific embodiment, two springs can be selected to be provided simultaneously. The two ends of the first spring are respectively connected to the first guiding post 121 and the spring fixing post 113, and the two ends of the second spring are respectively connected to the second guiding post 122 and the spring fixing post 113, so that no matter which end the rack 11 moves towards, there is a corresponding spring to provide an immediate restoring force, thereby improving the overall transmission performance and operation reliability.

[0033] In order to ensure that the rack 11 can slide smoothly and maintain good positioning accuracy during the horizontal movement, and at the same time allow slight lateral displacement for easy assembly and adjustment, in a more specific embodiment, the first guiding groove 111 and the second guiding groove 112 can be designed with a U-shaped or V-shaped cross-section to match the shape of the guiding post.

[0034] In some other embodiments, the spring fixing post 113 is designed to be cylindrical, facilitating the stable sleeving of the spring 13 thereon, and its shape helps to reduce the offset of the spring 13 during compression and reset. The first guiding post 121 and the second guiding post 122 are designed to be cylindrical, and the ends are chamfered, which not only reduces the wear when contacting the guiding groove, but also makes the assembly smoother. The cooperative design of these guiding posts and the guiding groove effectively ensures the precise guiding and stable operation of the rack 11, while the spring fixing post 113 ensures that the spring can effectively provide a reset force. The whole design improves the stability and durability of the transmission assembly, and also simplifies the maintenance and adjustment work.

[0035] In order to reduce the contact resistance of the rack, improve the smoothness of transmission, and increase the service life of the rack, in more specific embodiments, the end of the rack 11 where the force is applied when the door leaf 5 is closed is arc-shaped, or, a roller is provided at the end of the rack 11 where the force is applied when the door leaf 5 is closed. The end of the rack 11 being arc-shaped is conducive to reducing the contact resistance and improving the smoothness of transmission, while setting a roller at the end of the rack 11 can effectively reduce the friction force, improve the transmission sensitivity and service life.

[0036] Embodiment 3 This embodiment is a further refinement and improvement of the drive assembly based on Embodiment 2.

[0037] Specifically, the drive assembly includes a bearing 23, a stud 22, and a gear 21. The bearing 23 is tightly connected to the gear 21, enabling the gear 21 to rotate only in the horizontal direction. The gear 21 is connected to the stud 22, and the teeth of the gear 21 mesh with the rack 11, such that when the rack 11 moves or resets, it can drive the gear 21 to rotate, thereby driving the stud 22 to rotate to drive the lower frame assembly to descend or ascend.

[0038] When closing the door leaf, the door frame 6 exerts a force on the rack 11, pushing the rack 11 to slide relative to the rack fixing plate 12, driving the gear 21 to rotate and causing the spring 13 to deform simultaneously; the gear 21 realizes stable horizontal rotation through the bearing 23 and drives the stud 22 below it to rotate synchronously, and the rotation of the stud drives the lower frame assembly to move downward along its axis, realizing the descent of the lower frame assembly.

[0039] When opening the door leaf, the rack gradually moves away from the door frame, the external force is gradually removed, and the reset of the spring 13 causes the rack 11 to slide in the opposite direction, continuing to drive the gear 21 and the stud 22 to rotate in the opposite direction as before, thereby driving the lower frame assembly to move upward along the axis of the stud 22.

[0040] It should be noted that in some specific embodiments, the stud 22 and the gear 21 can be connected by screws, while in other specific embodiments, the stud 22 and the gear 21 can also be connected by welding. Even in other specific embodiments, the stud 22 and the gear 21 can be integrally formed. No matter how the stud and the gear are connected, as long as the rotation of the gear can drive the rotation of the stud, it shall fall within the protection scope of the present invention.

[0041] It should be noted that the cooperation between the transmission component and the driving component can be realized in various structural forms: For example, in some other embodiments, a friction block or a roller is provided at the end of the transmission component and contacts the outer peripheral surface of the driving component, and the movement is transmitted by using the frictional force. When the transmission component moves, it pushes the driving component to rotate to realize the lifting function.

[0042] For another example, in some other embodiments, the transmission component is provided with a convex portion, which cooperates with a groove or a roller on the driving component. When the transmission component moves, the driving component is caused to generate a rotational movement through the action of a cam, and then the lower frame component is driven to lift.

[0043] For yet another example, in some other embodiments, the transmission component is connected to a swing link, and the other end of the link is hinged to the driving component. When the transmission component moves, it drives the link to swing, thereby pushing the driving component to rotate to realize the lifting control.

[0044] The above various structural forms can all realize the effective transmission of the transmission component to the driving component, and all shall fall within the protection scope of the present invention.

[0045] Embodiment 4 This embodiment is a further refinement and improvement of the lower frame component on the basis of Embodiment 3.

[0046] Specifically, the lower frame component includes a lower frame main body 32, a nut fixing plate 33 and a nut 31; the nut fixing plate 33 is connected to the lower frame main body 32, and the nut 31 is fixed on the nut fixing plate 33; the nut 31 is in threaded cooperation with the stud 22, and when the stud 22 rotates, the nut 31 is loosened or locked to drive the nut 31 to move along the axial direction of the stud 22, thereby driving the lower frame main body 32 to descend or ascend.

[0047] The nut 31 of the lower frame component is in threaded cooperation with the stud 22. The nut fixing plate 33 can be vertically fixed on the lower frame main body 32, or its fixing direction can be adjusted during actual application so that the nut 31 drives the lower frame main body 32 to lift stably. The nut 31 can also be fixed on the lower frame main body 32 at the same time.

[0048] The nut 31 is engaged with the stud 22 in the drive assembly through threads. When the stud 22 of the drive assembly rotates, since the nut 31 is threadedly connected to the stud 22 and the nut 31 is fixed to the nut fixing plate 33 and cannot rotate with the stud 22, during the rotation of the stud 22, the nut will loosen or tighten, causing the nut 31 to move axially along the stud and driving the lower frame body 32 fixed thereto to lift and lower synchronously. This structure realizes the lifting action through screw drive, with a compact structure, accurate positioning, and stable operation. In some other embodiments, the nut fixing plate 33 can be replaced with a linear slide rail to enable the nut 31 to slide up and down along the linear slide rail, improving the stability and guiding accuracy during the lifting process.

[0049] It should be noted that the cooperation between the drive assembly and the lower frame assembly can also be realized in various structural forms to achieve the transmission and control of the lifting action and adapt to different embodiments of the foregoing transmission assembly.

[0050] For example, in some other embodiments, the stud in the drive assembly and the nut in the lower frame assembly can be interchanged, and the same technical effect can also be achieved.

[0051] For another example, in some other embodiments, the drive assembly is provided with a threaded portion, and the lower frame assembly is provided with an internal threaded structure that cooperates with it. When the drive assembly rotates, it drives the lower frame assembly to move up and down axially through screw drive.

[0052] For another example, in some other embodiments, a gear-rack transmission structure is adopted between the drive assembly and the lower frame assembly. The drive assembly includes a driving gear that meshes with the rack on the lower frame assembly. When the drive assembly rotates, it drives the lower frame assembly to move linearly.

[0053] For another example, in some other embodiments, a cam-slider mechanism is provided between the drive assembly and the lower frame assembly. The drive assembly includes a cam with a specific contour that cooperates with the roller or slider on the lower frame assembly. When the drive assembly rotates, the lower frame assembly is pushed up and down through the change of the cam contour.

[0054] For another example, in some other embodiments, the drive assembly is connected to a link mechanism. The other end of the link mechanism is hinged to the lower frame assembly. When the drive assembly rotates, it drives the link to swing, thereby pushing the lower frame assembly to realize the lifting action.

[0055] The above various structural forms can all effectively drive the lower frame assembly by the drive assembly and cooperate with different forms of transmission assemblies to form a complete lifting control structure, and all should fall within the protection scope of the present invention.

[0056] Embodiment 5 In order to reduce the noise and friction when the lower frame component contacts the ground, based on Embodiments 1 to 4, this embodiment further refines and improves the lower frame component, that is, a sound insulation plate is installed at the position of the lower frame component corresponding to the ground.

[0057] Specifically, based on Embodiment 4, a sound insulation plate 34 is installed at the ground corresponding to the lower frame main body 32. It can also be that sound insulation plates are installed near the ground corresponding to the lower frame main body 32. It can also be that sound insulation plates are installed at the ground corresponding to the lower frame main body 32 and near the ground corresponding to the lower frame main body 32; the sound insulation plate can reduce the noise and friction when the lower frame main body 32 contacts the corresponding ground.

[0058] Embodiment 6 Based on Embodiments 1 to 5, a lower frame automatic lifting door provided in this embodiment further includes a component housing 4, which is integrated at the bottom of the door leaf 5, and the component housing 4 houses a transmission component, a driving component, and a lower frame component inside.

[0059] It should be noted that the transmission component and the driving component are integrally fixed inside the component housing 4, but one end of the transmission component protrudes from the component housing 4 and can be subjected to a force when the door leaf 5 is opened. And, an opening is provided at the lower end of the component housing 4 to reserve space for the lifting of the lower frame component.

[0060] In a preferred embodiment, a bearing fixing plate 41 and a transmission fixing plate 42 are provided inside the component housing 4. Among them, the bearing 23 is fixed on the bearing fixing plate 41, and the gear fixing plate 12 is fixed on the transmission fixing plate 42.

[0061] In some other embodiments, the bearing fixing plate 41 can be arranged above the transmission fixing plate 42. Correspondingly, the gear fixing plate 12 is fixed above the transmission fixing plate 42, and the bearing 23 is connected above the gear 21; when the bearing 23 is connected to the bearing fixing plate, the teeth of the gear 21 just mesh with the rack 11.

[0062] In some other embodiments, the nut 31, the lower frame main body 32, and the nut fixing plate 33 are located at the lower part of the entire component housing 4, and the nut 31 is connected to the lower end of the stud 22 and is in threaded cooperation.

[0063] Embodiment 7 Based on Embodiments 1 to 6, the lower frame automatic lifting door provided in this embodiment can further be refined and improved as follows: For example, a lock core 51, a handle 52, a smart screen 53, and a door lock control device can also be provided on the door leaf 5; the lock core 51, the handle 52, and the smart screen 53 are all electrically connected to the door lock control device. Integrating the lock core 51, the handle 52, and the smart screen 53 and electrically connecting them to the door lock control device improves the security and intelligent operation experience of the door.

[0064] For another example, a hinge 7 is installed between the door leaf 5 and the door frame 6. The hinge 7 enables the door leaf 5 to open or close relative to the door frame 6, ensuring that the door leaf 5 can open or close smoothly. In some other embodiments, in addition to the basic hinge configuration, an adjustable hinge design can be introduced, allowing users to fine-tune the gap between the door leaf 5 and the door frame 6 according to actual needs, ensuring tightness and smooth opening and closing after long-term use.

[0065] For yet another example, a sealing strip 8 is installed between the door leaf 5 and the door frame 6, which can effectively enhance the sealing performance of the door. This design not only prevents the penetration of air, water vapor, and noise, but also improves the indoor comfort and privacy protection. The presence of the sealing strip 8 also reduces the impact force when the door leaf 5 closes, extending the service life of the door body. The sealing strip 8 can be made of a multi-layer composite material, with better sound insulation and heat insulation effects, and can adapt to temperature differences in different seasons, maintaining elasticity without hardening. It should be noted that the sealing strip can be provided only on the door frame 6, or only on the door leaf 5, or on both the door frame and the door leaf. Regardless of where the sealing strip is provided and the number of sealing strips provided, it can achieve sealing of the gap between the door frame and the door leaf. It should be noted that in a further preferred embodiment, a magnetic material can be embedded inside the sealing strip 8 so that it can generate an attractive force with the metal component on the door frame 6 when the door is closed, enhancing the sealing effect. It should be noted that in a further preferred embodiment, the edge of the sealing strip 8 can be designed in the form of an oblique angle or a rounded corner, reducing wear and facilitating cleaning and maintenance. These improvement measures not only enhance the sealing performance and service life of the door, but also significantly improve its sound insulation, heat insulation capabilities, and convenience of use.

[0066] Of course, these above-mentioned refinements and improvements can be separate or in cooperation with each other.

[0067] It should be understood that the embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of this application.

Claims

1. A lower frame automatic lifting door, comprising a door frame and a door leaf, characterized in that: Also includes: A transmission assembly, which can be subjected to a force and move in a horizontal direction when the door leaf is closed, and which can release the force and return to the horizontal direction when the door leaf is opened; A driving assembly connected to the transmission assembly, and driving the driving assembly to rotate when the transmission assembly moves or resets; The lower frame assembly is connected to the driving assembly, and when the driving assembly rotates, the lower frame assembly is driven to descend or ascend.

2. The lower frame automatic lifting door according to claim 1, characterized in that: The transmission assembly includes: a spring, a rack and a rack fixing plate; The first end of the spring is fixed to the rack, and the second end is fixed to the rack fixing plate; The rack can be subjected to a force when the door leaf is closed and move along the rack fixing plate to deform the spring, and it can release the force when the door leaf is opened and be subjected to the rebound force of the spring to reset along the rack fixing plate.

3. The lower frame automatic lifting door according to claim 2, characterized in that: A first guide groove is provided at the first end of the rack, and a spring fixing column is also provided on the rack; Corresponding to the position of the first guide groove, a first guide column is provided at the first end of the rack fixing plate, and the first guide column is located in the first guide groove; The first end of the spring is fixed to the rack through the spring fixing column, and the second end of the spring is fixed to the rack fixing plate through the first guide column.

4. The lower frame automatic lifting door according to claim 3, characterized in that: The second end of the rack is provided with a second guide groove; Corresponding to the position of the second guide groove, a second guide column is provided at the second end of the rack fixing plate, and the second guide column is located in the second guide groove.

5. The lower frame automatic lifting door according to claim 2, characterized in that: The end of the rack that is subjected to the force when the door leaf is closed is arc-shaped, or the end of the rack that is subjected to the force when the door leaf is closed is provided with a roller.

6. The lower frame automatic lifting door according to any one of claims 2 to 5, characterized in that: The drive assembly includes a bearing, a stud and a gear; The bearing is tightly connected to the gear so that the gear can only rotate in the horizontal direction; The stud is connected to the gear by screws, or the stud is connected to the gear by welding, or the stud and the gear are integrally formed; The teeth of the gear mesh with the rack, so that when the rack moves or resets, it can drive the gear to rotate, thereby driving the stud to rotate, so as to drive the lower frame assembly to descend or ascend.

7. The lower frame automatic lifting door according to claim 6, characterized in that: The lower frame assembly comprises a lower frame body, a nut fixing plate and a nut; The nut fixing plate is connected to the lower frame body, and the nut is fixed on the nut fixing plate; The nut is threadably matched with the stud, and when the stud rotates, the nut is loosened or tightened to drive the nut along the axial direction of the stud to drive the lower frame body to descend or ascend.

8. The lower frame automatic lifting door according to claim 7, characterized in that: A mute plate is installed at the ground corresponding to the lower frame body, and / or a mute plate is installed at the lower frame body close to the corresponding ground.

9. The lower frame automatic lifting door according to claim 1, characterized in that: Also included is a component housing; The component housing is integrated at the bottom of the door leaf, and the component housing accommodates the transmission assembly, the drive assembly and the lower frame assembly.

10. The lower frame automatic lifting door according to claim 1, characterized in that: The door leaf is also provided with a lock core, a handle, a smart screen and a door lock control device; The lock core, the handle, and the smart screen are all electrically connected to the door lock control device; A hinge is installed between the door frame and the door leaf, so that the door leaf can be opened or closed relative to the door frame; A sealing strip is arranged between the door frame and the door leaf.

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