Heavy sliding door with enhanced sound and heat insulation

Abstract

This invention discloses a heavy-duty sliding door with enhanced sound and heat insulation performance, belonging to the field of sliding door technology. It includes: a door leaf with a bottom abutment cavity; a door track having a track groove for the door leaf to slide in and a receiving cavity located in the middle of the track groove, the receiving cavity having an embedded lower track on the top of the rear cavity relative to the sliding direction, and a heat insulation block housed in the front cavity relative to the door leaf; and a partition assembly for raising the heat insulation block when the door leaf is closed, so that the heat insulation block abuts in the abutment cavity. The partition assembly includes: a gear set; a rack; and a swing assembly. This invention converts the rotational motion of the gears into the vertical lifting motion of the heat insulation block through the swing assembly, and combines this with a parallel linkage mechanism to improve the uniformity of force on the heat insulation block, allowing it to rise and fall smoothly and vertically without shaking or tilting, ensuring reliable sealing. The entire sealing action is linked to the door closing action, requiring no additional steps from the user; closing the door automatically seals the door.

Description

Technical Field

[0001] This invention relates to the field of sliding door technology, and in particular to a heavy-duty sliding door with enhanced sound and heat insulation performance. Background Technology

[0002] The sound and heat insulation performance of existing heavy-duty sliding doors mainly relies on the multi-chamber thermal break structure of the door frame, double-glazed windows, and sealing strips between the door leaf and the frame. While this improves performance to some extent, it still has shortcomings. First, the lower track structure is the main channel for energy leakage and sound transmission. To ensure smooth sliding, the lower track is usually designed as a continuous, through-type channel. Even with a sealing strip at the bottom of the door leaf, this through-type channel still forms a passage connecting the interior and exterior, creating a sound bridge and a thermal bridge. Sound and heat can easily propagate along this channel, severely weakening the sound and heat insulation effect of the door leaf itself and the surrounding seals. Second, there is a fundamental contradiction between drainage and sealing. To prevent rainwater accumulation, drainage holes are usually installed in the lower track of sliding doors. These drainage holes compromise the track's airtightness, leading to a further decrease in sound and heat insulation performance. Existing technology cannot switch between the two states of closing the drainage holes when sealing is needed and opening them when drainage is needed. Furthermore, the traditional method of sealing the door leaf and the bottom track relies on the door leaf's own weight pressing the sealing strip. When the door leaf may sag slightly due to long-term use, especially when the sealing strip is pushed out by the bottom track inside the door leaf, it not only increases the weight and complexity of the door leaf, but also leads to uneven sealing pressure or even local failure, affecting its service life and sealing effect. Summary of the Invention

[0003] The purpose of this invention is to provide a heavy-duty sliding door with enhanced sound and heat insulation performance, so as to solve one or more technical problems existing in the prior art, and at least provide a beneficial option or create conditions.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0005] This invention provides a heavy-duty sliding door with enhanced sound and heat insulation performance, comprising:

[0006] The door leaf has an abutment cavity at the bottom that extends along the sliding direction of the door leaf, and the cross-section of the abutment cavity is a U-shaped groove that opens downwards;

[0007] The door track has a track groove for the door leaf to slide and a receiving cavity located in the middle of the track groove. The receiving cavity is covered with an embedded lower track on the top of the relative rear cavity in the pushing and pulling direction, and a heat insulation block is housed in the relative front cavity. The heat insulation block is located below the door leaf when the door leaf is in the closed state and its length is the same as the width of the door leaf.

[0008] A partition assembly is used to raise the heat insulation block when the door is in the closed state, such that the heat insulation block abuts against the abutment cavity, the partition assembly comprising:

[0009] A gear set, which is vertically mounted on the cavity wall of the receiving cavity and supported by bearings or bushings, with some gears passing through the cavity wall of the receiving cavity to enable the gear set to drive on both the inside and outside sides of the cavity wall;

[0010] A rack is installed on the outer bottom of the door leaf, with its teeth facing the gear set, and it engages with the gear set for transmission when the door leaf is pushed or pulled to the closed state;

[0011] The swing assembly has a first slide rod that moves horizontally along the push-pull direction, a second slide rod disposed at the bottom of the heat insulation block, and a plurality of connecting rods hinged to the first and second slide rods. The plurality of connecting rods are arranged in parallel. The first slide rod has a toothed surface that meshes and drives with the gear set, so that the first slide rod moves horizontally when the gear set rotates. The connecting rods drive the second slide rod and the heat insulation block to be vertically pushed upward into the abutment cavity in the receiving cavity.

[0012] In operation, the user pushes the door towards the closed position. As the door approaches full closure (near the closed state), a rack mounted on the bottom outer side of the door engages with a gear set mounted on the side wall of the receiving cavity. The continued linear movement of the door drives the rack, which in turn rotates the gear set. The first slide rod (whose toothed side is equivalent to a section of the rack), which meshes with the gear set, moves horizontally in the pushing / pulling direction under the drive of the gear set. The horizontal movement of the first slide rod is transmitted to the second slide rod through several parallel connecting rods hinged to it. According to the parallelogram principle, this transmission method converts the horizontal movement of the first slide rod into the vertical lifting and lowering movement of the second slide rod. The second slide rod rises vertically upward, pushing the heat insulation block up from the receiving cavity, where the heat insulation block is embedded in the downward-opening U-shaped abutment cavity at the bottom of the door. When the door is in the closed position (completely closed), the top of the heat insulation block fits tightly against the inner contour of the abutment cavity, forming a continuous and uninterrupted sealing interface. The top of the heat insulation block is provided with a sealing layer, which is compressed between the heat insulation block and the inner wall of the abutment cavity when the heat insulation block is raised, thereby forming an airtight and watertight seal, enhancing the sound and heat insulation performance of the heavy-duty sliding door.

[0013] In this technical solution, the heat insulation block is simultaneously lifted by the second sliding rod at the bottom, ensuring uniform force distribution and a synchronized seal along its entire length. This solves the core problem of uneven sealing pressure, improving reliability. After being raised, the heat insulation block embeds itself into the door's contact cavity. A heat-insulating sealed chamber is also formed between the heat insulation block and the U-shaped groove. For sound and heat to penetrate the heat insulation block embedded in the contact cavity, the path must first pass through the seal between one side of the heat insulation block and the contact cavity, then through the heat-insulating sealed chamber formed by the U-shaped groove and the heat insulation block, and finally through the seal between the other side of the heat insulation block and the contact cavity. This path is more convoluted and longer than traditional methods, further improving sound and heat insulation performance. The multi-segment contact and large contact area significantly enhance sealing efficiency. Furthermore, the partition components are hidden within the track, resulting in a clean and complete appearance for both the door and the track, with internal linkage only during functional operation.

[0014] This technical solution solves the problem of the traditional sliding door's lower track serving as a channel for energy and sound transmission by raising a heat insulation block of the same width as the door leaf in the middle of the lower track and embedding it into the abutment cavity under the door leaf. It uses a rack and pinion system as the primary transmission to convert the linear motion of the door leaf into rotational motion, ensuring good synchronization and preventing slippage or jamming. Then, a swing mechanism further converts the rotational motion of the gears into the vertical lifting and lowering motion of the heat insulation block. Because the heat insulation block is a single unit, supported and lifted by a second sliding rod at its bottom through multiple linkage points, the lifting force is evenly distributed, ensuring consistent sealing pressure along the entire length of the sealing strip and preventing seal failure caused by excessive or insufficient force at a single point. Combined with a parallel linkage mechanism, the uniformity of force on the heat insulation block is improved, allowing for smooth and vertical lifting and lowering without wobbling or tilting, ensuring reliable sealing. The entire sealing action is linked to the door's closing action, eliminating the need for additional steps (such as manually locking the bottom device); closing the door automatically seals the seal, improving the product's ease of use.

[0015] As an extension of the above solution: the receiving cavity is provided with a partition at the end of the heat insulation block, dividing the receiving cavity into a heat insulation cavity enclosed by the embedded lower rail and a heat insulation block receiving cavity for storing the heat insulation block; the heat insulation block receiving cavity is provided with a vertical guide slot, and the heat insulation block is provided with a vertical guide protrusion corresponding to the guide slot, so that the heat insulation block moves up and down in the vertical direction under the push of the second slide rod.

[0016] This extended solution divides the receiving cavity into an insulation cavity and an insulation block receiving cavity by setting a partition. The insulation cavity can be filled with insulation material to form a static and fixed heat insulation barrier. The insulation block receiving cavity, through the cooperation of guide slots and guide protrusions, with the cross-sections of the guide slots and guide protrusions being rectangular, trapezoidal, or other shapes, mainly provides vertical guidance for the lifting and lowering of the insulation block. This ensures that the insulation block will not sway or deflect horizontally during the lifting and lowering process, thus allowing it to be embedded in the abutment cavity at the bottom of the door leaf, avoiding sealing failure or mechanism jamming due to misalignment.

[0017] As an extension of the above scheme: the several connecting rods in the swing group together with the first slide rod and the second slide rod form a parallelogram-shaped lifting linkage mechanism. The first slide rod and the second slide rod are arranged in parallel, and the lengths of the several connecting rods are equal and parallel to each other, so that when the first slide rod moves horizontally, the second slide rod and the heat insulation block move vertically up and down in the receiving cavity.

[0018] This extended solution uses a parallelogram mechanism. During the movement, since the second slide rod is a rigid rod, it is synchronously driven by the first slide rod through multiple parallel connecting rods. Therefore, the lifting force on the upper insulation block is evenly distributed along its entire length, which solves the problem of poor sealing caused by uneven force in traditional single-point or a few-point ejection solutions.

[0019] As an extension of the above solution: the heat insulation block is an integral strip-shaped component, continuously bent in the width direction to form several heat insulation chambers, the heat insulation chambers including:

[0020] The central cavity is located in the middle of the heat insulation block, with the cavity opening facing upwards;

[0021] The two side cavities are located on either side of the central cavity, with their openings facing downwards.

[0022] This extended solution forms an insulation chamber through a continuous bending process, which is equivalent to building multiple static air layers. Air is an excellent thermal insulator and sound wave damping medium. This multi-chamber structure greatly increases the difficulty and impedance of heat conduction and sound wave propagation paths, thereby significantly improving the performance of the insulation block itself.

[0023] As an extension of the above solution: the top of the heat insulation block is provided with a sealing part, the cross-section of which is T-shaped and the lower part of the T-shape is inserted into the central cavity, and the top surface of the sealing part is arched upward; the inner walls of the opposite sides of the abutting cavity are provided with abutting protrusions that protrude horizontally toward the opposite center, and the abutting protrusions on both sides are spaced apart and the distance between them is less than the width of the sealing part, so that after the heat insulation block is raised, the top surface of the sealing part abuts against the abutting protrusions near its edge.

[0024] This extended solution uses the arched T-shaped sealing part to cooperate with the abutment protrusions on both sides to form two independent, high-pressure sealing contact lines. Only a small force is needed to generate extremely high critical sealing pressure on the two lines, resulting in higher efficiency. Moreover, the two high-pressure sealing lines have low requirements for overall flatness and strong fault tolerance.

[0025] As an extension of the above solution: the top of the inlaid lower rail is provided with a decorative part, the top surface contour of which is consistent with the top surface contour of the sealing part, and the inlaid lower rail is connected to the end of the heat insulation block, so that the top surface of the decorative part and the top surface of the sealing part are flush and continuous when the door is not closed. When the door is open, the top surface of the decorative part of the inlaid lower rail is flush with the top surface of the sealing part of the heat insulation block and the contour is consistent, forming a visually continuous and seamless track plane, which enhances the aesthetics and overall appearance of the product and meets the requirements of the high-end market for details.

[0026] As an extension of the above solution: a fixed seat is provided at the bottom of the outer side of the door leaf, and the rack is connected to the side of the fixed seat through an elastic compensation component. The elastic compensation component includes a compression spring so that the rack has a buffer stroke when it meshes with the gear set.

[0027] This extended solution uses an elastic compensation component to enable the rack to automatically absorb misalignment caused by machining errors, installation deviations, or thermal expansion and contraction at the moment of meshing, thus avoiding tooth surface wear, impact noise, or even jamming caused by rigid impact.

[0028] As an extension of the above solution, a drainage hole is provided at the bottom of the side wall of the receiving cavity. The drainage hole can prevent water from accumulating in the receiving cavity, thereby avoiding corrosion, freezing and dirt accumulation caused by water accumulation, and improving the operational reliability of the partition assembly.

[0029] As an extension of the above solution: the bottom wall of the receiving cavity is provided with a slide rail extending in the width direction and a valve core slidably connected to the slide rail. One end of the valve core facing the drain hole is covered with a rubber layer for sealing the drain hole. The other end of the valve core is hinged to the first slide rod through a valve stem, so that the first slide rod drives the heat insulation block to rise while pushing the valve core on the slide rail toward the drain hole through the valve stem.

[0030] This extended solution addresses the challenge of balancing drainage and sealing in traditional solutions. While traditional methods use drainage holes in the lower track of sliding doors to prevent rainwater accumulation, these holes compromise the track's airtightness, further reducing sound and heat insulation. In this embodiment, as the first slide rod drives the second slide rod to vertically lift and close the door, a valve rod transmits the movement of the first slide rod to the valve core. This causes the valve core to move towards and block the drainage hole, resolving the long-standing structural problem of balancing drainage and sealing. Furthermore, it requires no additional power or control, utilizing the door's own movement as the power source, resulting in high reliability.

[0031] As an extension of the above solution, a state detection module located within the receiving cavity is also included, the state detection module comprising:

[0032] Magnets are embedded in the side of the heat insulation block;

[0033] A Hall sensor is fixed to the inner wall of the receiving cavity and electrically connected to an LED indicator light located on the door handle;

[0034] When the heat insulation block rises to its highest point, the magnet is aligned with the Hall sensor, triggering the LED indicator to light up.

[0035] This extended solution places the detection point on the insulation block, which can accurately reflect the final position of the insulation block and provide users with precise visual feedback on whether the seal is in place. Attached Figure Description

[0036] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0037] Figure 1 This is a structural schematic diagram of the door leaf and door track in an embodiment, where the left side is the indoor side and the right side is the outdoor side;

[0038] Figure 2 yes Figure 1 A schematic diagram of the local structure at point A;

[0039] Figure 3 This is a schematic diagram of the structure of the indoor door in the closed state according to the embodiment;

[0040] Figure 4 This is a top view of the indoor side door track in an embodiment.

[0041] Figure 5 This is a schematic diagram of the partition component in the embodiment;

[0042] Figure 6 yes Figure 1 A schematic diagram of the local structure at point B.

[0043] In the attached diagram: 100: door leaf, 110: abutment cavity, 111: abutment protrusion, 120: fixed seat, 130: compression spring, 200: door track, 210: track groove, 220: receiving cavity, 221: partition, 222: heat insulation cavity, 223: heat insulation block receiving cavity, 224: guide groove, 230: drain hole, 240: slide rail, 250: valve core, 260: valve stem, 300: heat insulation block, 310: central cavity, 320: side cavities, 330: sealing part, 410: gear set, 420: rack, 430: swing assembly, 431: first slide rod, 4311: tooth side surface, 432: second slide rod, 433: connecting rod. Detailed Implementation

[0044] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0045] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0046] In the description of this invention, if there are words such as "several", they mean one or more, "multiple" means two or more, "greater than", "less than", "exceeding" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself.

[0047] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0048] Reference Figures 1 to 6 The following are several embodiments of a heavy-duty sliding door with enhanced sound and heat insulation performance according to the present invention.

[0049] In some embodiments, such as Figures 1 to 5 As shown, the present invention provides a heavy-duty sliding door with enhanced sound and heat insulation performance, comprising:

[0050] The door leaf 100 has an abutment cavity 110 extending along the door leaf sliding direction at its bottom. The cross-section of the abutment cavity 110 is a U-shaped groove that opens downwards.

[0051] The door track 200 has a track groove 210 for the door leaf 100 to slide on and a receiving cavity 220 located in the middle of the track groove 210. The receiving cavity 220 is covered with an embedded lower track on the top of the relative rear cavity in the push-pull direction, and a heat insulation block 300 is housed in the relative front cavity. The heat insulation block 300 is located below the door leaf when it is in the closed state and its length is the same as the width of the door leaf 100.

[0052] A partition assembly is used to raise the heat insulation block 300 when the door leaf 100 is in the closed state, such that the heat insulation block 300 abuts against the abutment cavity 110. The partition assembly includes:

[0053] The gear set 410 is vertically mounted on the cavity wall of the receiving cavity 220 and supported by bearings or bushings, with part of the gears passing through the cavity wall of the receiving cavity 220 so that the gear set 410 can drive on both sides of the cavity wall.

[0054] A rack 420 is installed on the outer bottom of the door leaf 100, with its tooth surface facing the gear set 410. When the door leaf 100 is pushed or pulled to the closed state, it meshes with the gear set 410 for transmission.

[0055] The swing assembly 430 has a first slide rod 431 that moves horizontally along the push-pull direction, a second slide rod 432 disposed at the bottom of the heat insulation block 300, and a plurality of connecting rods 433 hinged to the first slide rod 431 and the second slide rod 432. The plurality of connecting rods 433 are arranged in parallel. The first slide rod 431 is provided with a toothed surface 4311 that meshes and drives with the gear set 410, so that the first slide rod 431 moves horizontally when the gear set 410 rotates. Through the connecting rods 433, the second slide rod 432 and the heat insulation block 300 are driven vertically upward in the receiving cavity 220 to the abutment cavity 110.

[0056] In this embodiment, the gear set is preferably a gear shaft with one or more gears fixed on it. Upper and lower connecting seats are fixed to the outer side wall of the receiving cavity. The gear shaft is supported between the upper and lower connecting seats by bearings and bushings, ensuring smooth rotation and stable position. One gear in the gear set meshes with a rack. The length of the rack must ensure effective meshing with the gear in the last segment of the door closing stroke (e.g., within 50-80mm) to complete the entire lifting action. Some gears in the gear set (or other coaxial gears or other gears in meshing transmission) pass through the cavity wall and mesh with the tooth side of the first slide rod on the inner side of the cavity wall. A horizontal guide rail or guide groove is provided inside the receiving cavity corresponding to the first slide rod, matching the shape of the first slide rod. For example, the first slide rod can be designed with a "T" or "I" shaped cross section and slide in the matching guide rail or guide groove, ensuring that the first slide rod can only move horizontally in the push-pull direction.

[0057] In this embodiment, the user pushes the door towards the closed position. As the door approaches full closure (near the closed state), a rack mounted on the bottom outer side of the door begins to engage with a gear set mounted on the side wall of the receiving cavity. During this process, in some preferred embodiments, a guide bevel or large arc chamfer is machined on the teeth of the rack at the meshing end, i.e., the end that first contacts the gear. Simultaneously, the ends of the gear teeth are also chamfered accordingly. If a slight misalignment occurs, the rack guide bevel will contact the chamfered ends of the gear teeth, and the resulting horizontal force will push the rack or gear to make a slight, adaptive positional adjustment, allowing the rack to smoothly slide into the correct meshing position.

[0058] The continued linear motion of the door drives the rack, which in turn rotates the gear set. The first slide rod (whose tooth flanks are equivalent to a section of the rack), meshing with the gear set, moves horizontally in the push-pull direction under the drive of the gear set. This horizontal movement of the first slide rod is transmitted to the second slide rod via several parallel connecting rods hinged to it. Based on the parallelogram principle, this transmission method converts the horizontal movement of the first slide rod into the vertical lifting and lowering movement of the second slide rod. In this embodiment, since the heat insulation block is housed in the receiving cavity, the cavity can horizontally limit its movement through its side walls, restricting its horizontal movement and allowing it to only lift and lower vertically. In the optional embodiments described below, a guide structure is provided to further guide the vertical movement; details will not be elaborated here.

[0059] The second sliding rod rises vertically upwards, pushing the heat insulation block up from the receiving cavity. The heat insulation block then embeds itself into the downward-opening U-shaped abutment cavity at the bottom of the door. When the door is in the closed position (completely closed), the top of the heat insulation block fits tightly against the inner contour of the abutment cavity, forming a continuous and uninterrupted sealing interface. A sealing layer (such as an adhesive sealing strip) is provided on the top of the heat insulation block. This sealing layer is compressed between the heat insulation block and the inner wall of the abutment cavity (or, in the embodiments described below, a protruding abutment protrusion on the inner wall of the abutment cavity) when the heat insulation block is raised, thereby forming an airtight and watertight seal, enhancing the sound and heat insulation performance of the heavy-duty sliding door.

[0060] When the door is opened, the above process is reversed: the rack drives the gear set to reverse, the first slide rod moves horizontally in the opposite direction, the connecting rod pulls the second slide rod down, and the heat insulation block returns to the receiving cavity, allowing the door to be pushed and pulled without obstruction. In some preferred embodiments, a torsion spring or tension spring is provided at the hinge point of the swing assembly or on the first slide rod. When the door is opened, the driving force of the rack on the gear set disappears (i.e., the rack is pulled away from the gear set). At this time, the heat insulation block is stored in the receiving cavity under normal operation. In this preferred embodiment, in order to further ensure the reset of the heat insulation block, a torsion spring or tension spring is provided. Under its force, the heat insulation block is driven back into the receiving cavity, keeping the top surface of the heat insulation block flush with the top surface of the embedded lower rail.

[0061] In traditional solutions, if a door leaf is equipped with a push-out mechanism, it is usually located at one end or a few points of the door leaf. This mechanism drives the long strip of thermal insulation to deform and push out. Due to the length and relatively soft nature of the thermal insulation strip, the force it experiences when pushed out and acting on the track is uneven. This usually manifests as one end being tightly pushed out while the other end still has a gap, or a gap in the middle section. Furthermore, an opening needs to be made at the bottom of the door leaf for the thermal insulation strip to push out. The contact between the pushed-out thermal insulation strip and the track plane is a line contact or a narrow surface contact, resulting in limited sealing effect.

[0062] In this embodiment, the heat insulation block is simultaneously lifted by the second sliding rod at the bottom, ensuring uniform force distribution and a synchronized seal along its entire length. This solves the core problem of uneven sealing pressure, improving reliability. Simultaneously, after the heat insulation block is raised, it embeds into the door's abutment cavity. A heat-insulating sealed chamber is also formed between the heat insulation block and the U-shaped groove. For sound and heat to penetrate the heat insulation block embedded in the abutment cavity, the path must first pass through the seal between one side of the heat insulation block and the abutment cavity (this sealing performance is equivalent to the sealing performance of the heat insulation strip in contact with the track plane in a traditional solution), then through the heat-insulating sealed chamber formed by the heat insulation block within the U-shaped groove, and finally through the seal between the other side of the heat insulation block and the abutment cavity. This path is more convoluted and longer than the traditional method, further improving sound and heat insulation performance. The multi-segment contact and large contact area double the sealing efficiency. Furthermore, the partition component in this embodiment is hidden within the track, resulting in a clean and complete appearance for both the door and the track, with internal linkage only during functional operation.

[0063] This embodiment solves the problem of the traditional sliding door's lower track serving as a channel for energy and sound transmission by raising a heat insulation block of the same width as the door leaf in the middle of the lower track and embedding it into the abutment cavity under the door leaf. It uses a rack and pinion system as the primary transmission to convert the linear motion of the door leaf into rotational motion, ensuring good synchronization and preventing slippage or jamming. Then, a swing mechanism further converts the rotational motion of the gears into the vertical lifting motion of the heat insulation block. Because the heat insulation block is a single unit, supported and lifted by a second sliding rod at its bottom through multiple linkage points, the lifting force is evenly distributed, ensuring consistent sealing pressure along the entire length of the sealing strip and preventing seal failure caused by excessive or insufficient force at a single point. Combined with a parallel linkage mechanism, the uniformity of force on the heat insulation block is improved, allowing for smooth and vertical lifting without wobbling or tilting, ensuring reliable sealing. The entire sealing action is linked to the door's closing action, eliminating the need for additional steps (such as manually locking the bottom device); closing the door automatically seals the seal, improving the product's ease of use.

[0064] In some embodiments, such as Figure 2 and Figure 4 As shown, the receiving cavity 220 has a partition 221 at the end of the heat insulation block 300, which divides the receiving cavity 220 into a heat insulation cavity 222 that is enclosed by the embedded lower rail and a heat insulation block receiving cavity 223 that houses the heat insulation block; the heat insulation block receiving cavity 223 has a vertical guide slot 224, and the heat insulation block 300 has a vertical guide protrusion corresponding to the guide slot 224, so that the heat insulation block 300 moves up and down in the vertical direction under the push of the second slide rod 432.

[0065] This embodiment divides the receiving cavity into an insulated cavity and an insulated block receiving cavity by setting a partition. The insulated cavity can be filled with insulation material (such as polyurethane foam) to form a static and fixed thermal insulation barrier. The insulated block receiving cavity, through the cooperation of guide slots and guide protrusions, with the cross-sections of the guide slots and guide protrusions being rectangular, trapezoidal, or other shapes, primarily provides vertical guidance for the lifting and lowering of the insulated block, ensuring that the insulated block does not sway or deflect horizontally during the lifting and lowering process. This allows it to be embedded into the abutment cavity at the bottom of the door leaf, avoiding sealing failure or mechanism jamming due to misalignment. The presence of the partition enhances the structural rigidity of the receiving cavity and prevents the moving parts in the insulated block receiving cavity from interfering with the filling material in the insulated cavity, ensuring the long-term operational reliability of the mechanism.

[0066] In some embodiments, such as Figure 2 and Figure 5 As shown, the several connecting rods 433 in the swing assembly 430 together with the first slide rod 431 and the second slide rod 432 form a parallelogram-shaped lifting linkage mechanism. The parallel arrangement of the first slide rod 431 and the second slide rod 432, and the fact that the lengths of the several connecting rods 433 are equal and parallel to each other, means that when the first slide rod 431 moves horizontally, the second slide rod 432 and the heat insulation block 300 move vertically up and down within the receiving cavity 220.

[0067] This embodiment uses a parallelogram mechanism. During the movement, since the second slide rod is a rigid rod, it is synchronously driven by the first slide rod through multiple parallel connecting rods. Therefore, the lifting force on the upper heat insulation block is evenly distributed along its entire length, which solves the problem of poor sealing caused by uneven force in traditional single-point or a few-point ejection schemes.

[0068] In some embodiments, such as Figure 1 and Figure 2 As shown, the heat insulation block 300 is an integral strip-shaped component, continuously bent in the width direction to form several heat insulation chambers, each heat insulation chamber including:

[0069] The central cavity 310 is located in the middle of the heat insulation block 300, with the cavity opening facing upwards;

[0070] The two side cavities 320 are located on both sides of the central cavity 310, with their openings facing downwards.

[0071] The integrated continuous bending in this embodiment is manufactured by aluminum profile extrusion molding process. This process can form a continuous cross section in one go, which is efficient and low cost. The integrated continuous bending forms a heat insulation chamber, which is equivalent to building multiple static air layers. Air is an excellent thermal insulator and sound wave damping medium. This multi-chamber structure greatly increases the difficulty and impedance of heat conduction and sound wave propagation paths, thereby significantly improving the performance of the heat insulation block.

[0072] In some embodiments, such as Figure 2 and Figure 3 As shown, the top of the heat insulation block 300 is provided with a sealing part 330. The cross-section of the sealing part 330 is T-shaped and the lower part of the T-shape is inserted into the central cavity 310. The top surface of the sealing part 330 is arched upward. The inner walls of the opposite sides of the abutting cavity 110 are provided with abutting protrusions 111 that protrude horizontally toward the opposite center. The abutting protrusions 111 on both sides are spaced apart and the distance between them is less than the width of the sealing part 330, so that after the heat insulation block 300 is raised, the top surface of the sealing part 330 abuts against the abutting protrusions 111 near its edge.

[0073] In this embodiment, the lower part of the T-shaped sealing portion is inserted into the central cavity, forming a reliable mechanical anchor to prevent the sealing portion from falling off or shifting under long-term friction and pressure. Since the contact point is located on the top surface of the sealing portion, and the spacing between the abutting protrusions on both sides is fixed, the top surface of the sealing portion presses against the bottom of the abutting protrusions. The presence of interference fit between the abutting protrusions also ensures a seal. Traditional seals use surface contact, which requires extremely high flatness and is prone to leakage, requiring a large total pressure to achieve full surface contact. This embodiment, through the cooperation of the arched T-shaped sealing portion and the abutting protrusions on both sides, forms two independent, high-line-pressure sealing contact lines. Only a small force is needed to generate extremely high critical sealing pressure on these two lines, resulting in higher efficiency. Furthermore, the two high-line-pressure sealing lines have lower requirements for overall flatness and stronger fault tolerance.

[0074] In some embodiments, the top of the inlaid lower rail is provided with a decorative portion, the top surface contour of which is consistent with the top surface contour of the sealing portion, and the inlaid lower rail is connected to the end of the heat insulation block, so that the top surface of the decorative portion and the top surface of the sealing portion are flush and continuous when the door is in the open state. When the door is open, the top surface of the decorative portion of the inlaid lower rail is flush with and has the same contour as the top surface of the sealing portion of the heat insulation block, forming a visually continuous and seamless track plane, enhancing the aesthetics and overall appearance of the product, and meeting the requirements of the high-end market for details.

[0075] In some embodiments, such as Figure 2 As shown, a fixed base 120 is provided at the bottom outer side of the door leaf 100. The rack 420 is connected to the side of the fixed base 120 through an elastic compensation component. The elastic compensation component includes a compression spring 130, which provides a buffer stroke for the rack 420 when it meshes with the gear set 410. A guide post is provided inside the fixed base. The mounting base of the rack is sleeved on the guide post and can slide along the guide post. The compression spring is sleeved on the guide post. The fixed base adopts a guide structure of the prior art (such as a guide post or guide groove) to ensure that the rack can only move in a direction perpendicular to the tooth surface, avoiding random shaking.

[0076] In this embodiment, when the rack and gear make misaligned contact, the radial force on the rack compresses the spring, causing the rack to move slightly backward or laterally until the tooth groove aligns with the gear tooth tip. Under the action of the spring force, it smoothly slides into the meshing position. Through the elastic compensation component, the rack can automatically absorb misalignment problems caused by machining errors, installation deviations, or thermal expansion and contraction at the moment of meshing, avoiding tooth surface wear, impact noise, or even jamming caused by rigid impact.

[0077] In some embodiments, such as Figure 2 As shown, the bottom of the side wall of the receiving cavity 220 is provided with a drainage hole 230. The drainage hole can prevent water from accumulating in the receiving cavity, thereby avoiding corrosion, freezing and dirt accumulation caused by water accumulation, and improving the operational reliability of the partition assembly.

[0078] In some embodiments, such as Figure 2 and Figure 5 and Figure 6 As shown, a drain hole 230 is provided as in the above embodiment. Since the normally open drain hole becomes a sound bridge and a thermal bridge when the door is closed, weakening the overall sound and heat insulation performance, in order to further eliminate the potential impact of the drain hole on the sound and heat insulation performance, the following linkage drain valve mechanism is adopted to realize the automatic sealing of the drain hole when the door is closed and sealed. Specifically: the bottom wall of the receiving cavity 220 is provided with a slide rail 240 extending in the width direction and a valve core 250 slidably connected to the slide rail 240. The end of the valve core 250 facing the drain hole 230 is covered with a rubber layer for sealing the drain hole 230. The other end of the valve core 250 is hinged to the first slide rod 431 through the valve rod 260, so that the first slide rod 431 drives the heat insulation block 300 to rise while pushing the valve core 250 on the slide rail 240 toward the drain hole 230 through the valve rod 260. In some specific embodiments, such as Figure 6 As shown, it is the door leaf and door track on the outdoor side. Drainage holes 230 are provided at the bottom of both side walls of the receiving cavity 220 to achieve bidirectional drainage. When the door leaf is in the closed state, the valve core can block the drainage hole on one side to cut off the passage of sound, heat and water flow between the left and right sides of the door leaf indoors and outdoors.

[0079] In this embodiment, the slide rail ensures that the valve core can only slide in a straight line, blocking and leaving the drain hole. It can be a miniature linear guide or a simple T-slot + slider structure. The rubber layer of the valve core uses weather-resistant silicone rubber or EPDM, and the preferred sealing method is a conical seal, where the valve core head is conical and matches the conical inlet of the drain hole, resulting in a sealing effect far superior to a planar seal. One end of the valve stem is hinged to the valve core, and the other end is hinged to the heat insulation block. The vertical movement of the heat insulation block is converted into the horizontal movement of the valve core by the length of the valve stem and the position of the hinge point.

[0080] Those skilled in the art will understand that the hinge point can use pins and bushings to reduce wear, and the length and installation position of the valve stem can be determined by motion simulation or geometric calculation to ensure that the valve core completely blocks the drain hole at the same time the first slide rod drives the second slide rod to the highest point.

[0081] This embodiment solves the problem of balancing drainage and sealing in traditional solutions. To prevent rainwater accumulation, drainage holes are installed in the lower track of the sliding door. However, these drainage holes compromise the track's airtightness, further reducing sound and heat insulation performance. Existing technologies cannot automatically close the drainage holes when sealing is needed and open them when drainage is required, failing to achieve a natural transition between the two states. In this embodiment, when the door is closed, a first sliding rod drives a second sliding rod to rise vertically upwards. A valve rod then transmits the moving first sliding rod to the valve core, causing the valve core to move along the track towards the drainage hole, sealing it and automatically closing the hole. At this point, the lower track is isolated from the outside, allowing the insulation block to function effectively. When the door is pushed open, the insulation block descends, and the valve rod moves the valve core away from the drainage hole, automatically opening it and ensuring normal drainage. This achieves the ideal state for heavy-duty sliding doors: no holes when sealing is needed, and a passageway when drainage is required. This solves the long-standing structural problem of balancing drainage and sealing, and requires no additional power or control, utilizing the insulation block's own movement as the power source, resulting in high reliability.

[0082] In some embodiments, a state detection module located within the receiving cavity is further included, the state detection module comprising:

[0083] Magnets are embedded in the side of the heat insulation block;

[0084] A Hall sensor is fixed to the inner wall of the receiving cavity and electrically connected to an LED indicator light located on the door handle;

[0085] When the heat insulation block rises to its highest point, the magnet aligns with the Hall sensor, triggering the LED indicator to light up. By placing the detection point on the heat insulation block, the final position of the heat insulation block can be accurately reflected, providing users with precise visual feedback on whether the seal is in place.

[0086] In this embodiment, neodymium iron boron magnets are used to ensure a sufficiently strong magnetic signal. A digital switch type Hall sensor is used, whose operating characteristic is that the output level flips when the magnetic field strength exceeds a threshold. The effective sensing distance between the magnet and the Hall sensor is typically a few millimeters; therefore, when the heat insulation block is raised to its highest point, the vertical alignment accuracy between the two must be within the sensing distance. The LED indicator lights up green when triggered, and can be set to be off or flashing red when the door is not fully closed or the heat insulation block is not raised, to provide richer status information.

[0087] In this embodiment, after the user closes the door, the illumination of the LED indicator on the handle provides a clear and intuitive indication that the seal is in place, eliminating any doubts about whether the door is properly closed and bringing a sense of security and technological sophistication. It should be noted that the electrical connection between the LED indicator and the Hall sensor can be achieved using existing technology.

[0088] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A heavy-duty sliding door with enhanced sound and heat insulation performance, characterized in that, include: The door leaf (100) has an abutment cavity (110) at the bottom that extends along the pushing and pulling direction of the door leaf (100), and the cross-section of the abutment cavity (110) is a U-shaped groove that opens downwards; The door track (200) has a track groove (210) for the door leaf (100) to slide and a receiving cavity (220) located in the middle of the track groove (210). The receiving cavity (220) has an embedded lower track on the top of the relative rear cavity in the push-pull direction, and a heat insulation block (300) is housed in the relative front cavity. The heat insulation block (300) is located below the door leaf (100) when it is in the closed state and its length is the same as the width of the door leaf (100). A partition assembly for raising the heat insulation block (300) when the door leaf (100) is in the closed state, such that the heat insulation block (300) abuts against the abutment cavity (110), the partition assembly comprising: The gear set (410) is vertically arranged with the cavity wall of the receiving cavity (220) supported by bearings or bushings, and part of the gear passes through the cavity wall of the receiving cavity (220) so that the gear set (410) can drive on both sides of the cavity wall. A rack (420) is installed on the outer bottom of the door leaf (100), with its tooth surface facing the gear set (410), and is engaged with the gear set (410) for transmission when the door leaf (100) is pushed or pulled to the closed state; The swing assembly (430) has a first slide rod (431) that moves horizontally along the push-pull direction, a second slide rod (432) disposed at the bottom of the heat insulation block (300), and a plurality of connecting rods (433) hinged to the first slide rod (431) and the second slide rod (432). The plurality of connecting rods (433) are arranged in parallel. The first slide rod (431) is provided with a toothed surface that meshes and drives with the gear set (410), so that the first slide rod (431) moves horizontally when the gear set (410) rotates, and the second slide rod (432) and the heat insulation block (300) are driven vertically upward in the receiving cavity (220) to the abutment cavity (110) through the connecting rods (433). The receiving cavity (220) has a partition (221) at the end of the heat insulation block, which divides the receiving cavity (220) into a heat insulation cavity (222) enclosed by the inlaid lower rail and a heat insulation block receiving cavity (223) for receiving the heat insulation block; the heat insulation block receiving cavity (223) has a vertical guide slot (224), and the heat insulation block (300) has a vertical guide protrusion corresponding to the guide slot (224), so that the heat insulation block (300) moves up and down in the vertical direction under the push of the second slide rod (432); The heat insulation block (300) is an integral strip-shaped component, continuously bent in the width direction to form several heat insulation chambers, the heat insulation chambers including: The central cavity (310) is located in the middle of the heat insulation block (300), with the cavity opening facing upward; The two side cavities (320) are located on both sides of the central cavity (310), with the cavity openings facing downwards.

2. The heavy-duty sliding door with enhanced sound and heat insulation performance according to claim 1, characterized in that: The several connecting rods (433) in the swing assembly (430), together with the first slide rod (431) and the second slide rod (432), form a parallelogram-shaped lifting linkage mechanism. The first slide rod (431) and the second slide rod (432) are arranged in parallel. The lengths of the several connecting rods (433) are equal and parallel to each other, so that when the first slide rod (431) moves horizontally, the second slide rod (432) and the heat insulation block (300) move vertically up and down in the receiving cavity (220).

3. A heavy-duty sliding door with enhanced sound and heat insulation performance according to claim 1, characterized in that: The top of the heat insulation block (300) is provided with a sealing part (330), the cross-section of which is T-shaped and the lower part of the T-shape is inserted into the central cavity (310). The top surface of the sealing part (330) is arched upward. The inner walls of the opposite sides of the abutting cavity (110) are provided with abutting protrusions (111) that protrude horizontally toward the opposite center. The abutting protrusions (111) on both sides are spaced apart and the distance between them is less than the width of the sealing part (330), so that after the heat insulation block (300) is raised, the top surface of the sealing part (330) near the edge abuts against the abutting protrusions (111).

4. A heavy-duty sliding door with enhanced sound and heat insulation performance according to claim 3, characterized in that: The top of the inlaid lower rail is provided with a decorative part, the top surface contour of the decorative part is consistent with the top surface contour of the sealing part (330), and the inlaid lower rail is connected to the end of the heat insulation block (300), so that the top surface of the decorative part and the top surface of the sealing part (330) are flush and continuous when the door leaf (100) is in the open state.

5. A heavy-duty sliding door with enhanced sound and heat insulation performance according to claim 1, characterized in that: A fixed seat (120) is provided on the bottom outer side of the door leaf (100). The rack (420) is connected to the side of the fixed seat (120) through an elastic compensation component. The elastic compensation component includes a compression spring (130) so that the rack (420) has a buffer stroke when it meshes with the gear set (410).

6. A heavy-duty sliding door with enhanced sound and heat insulation performance according to claim 1, characterized in that: The bottom of the side wall of the receiving cavity (220) is provided with a drainage hole (230).

7. A heavy-duty sliding door with enhanced sound and heat insulation performance according to claim 6, characterized in that: The bottom wall of the receiving cavity (220) is provided with a slide rail (240) extending in the width direction and a valve core (250) slidably connected to the slide rail (240). One end of the valve core (250) facing the drain hole (230) is covered with a rubber layer for sealing the drain hole (230). The other end of the valve core (250) is hinged to the first slide rod (431) through the valve rod (260), so that the first slide rod (431) drives the heat insulation block (300) to rise while pushing the valve core (250) on the slide rail (240) toward the drain hole (230) through the valve rod (260).

8. A heavy-duty sliding door with enhanced sound and heat insulation performance according to claim 1, characterized in that: It also includes a status detection module located within the receiving cavity (220), the status detection module comprising: Magnets are embedded in the side of the heat insulation block (300); A Hall sensor is fixed to the inner wall of the receiving cavity (220) and electrically connected to an LED indicator light on the handle of the door leaf (100); When the heat insulation block (300) rises to its highest point, the magnet is aligned with the Hall sensor, triggering the LED indicator to light up.

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