Hidden rail broken bridge aluminum heavy sliding door

Abstract

The application relates to the technical field of broken bridge aluminum heat-insulating doors and windows, in particular to a hidden track broken bridge aluminum heavy-duty sliding door which comprises a bottom frame and a door body installed in the bottom frame, an installation groove with an upward opening is formed in the bottom frame, a track is arranged in the installation groove, the door body comprises at least two vertical frames, cover plates are arranged in the two vertical frames, a tension spring is arranged in the vertical frame, one end of the tension spring is fixed on the frame, the other end of the tension spring is fixedly connected with one end of the cover plate in a vertical mode, the end of the cover plate away from the tension spring extends out of the frame and is bent in a horizontal mode to cover the upward opening of the installation groove, the upper surface of the cover plate is flush with the upper portion of the bottom frame, the end of the cover plate away from the tension spring is fixed on the end portion of the bottom frame, the two cover plates are respectively arranged on the bottom frames on the two sides of the door body, a fixed pulley is arranged at the bending position of the cover plate, and the fixed pulley is used for guiding the bending of the cover plate. The application has the effect of reducing sundries falling into the groove on the bottom frame.

Description

Technical Field

[0001] This application relates to the technical field of thermally broken aluminum doors and windows, and in particular to a heavy-duty sliding door made of thermally broken aluminum with an invisible track. Background Technology

[0002] Thermally broken aluminum windows and doors offer excellent thermal insulation, reducing heat transfer between indoors and outdoors, thus contributing to energy conservation and environmental protection. Thermally broken aluminum sliding doors are constructed from thermally broken aluminum and glass. To achieve better insulation, the glass is often double- or triple-glazed, increasing the door's weight. A track is also installed at the bottom of the sliding door for installation.

[0003] A related technology discloses a heavy-duty aluminum alloy sliding door, including a bottom frame. The bottom frame is equipped with an outer door track, an inner door track, and a screen door track. A first outer sliding door and a second outer sliding door are mounted on the outer door track, and a first inner sliding door and a second inner sliding door are mounted on the inner door track. A first movable screen door and a second movable screen door are mounted on the screen door track. Because the bottom frame needs to support the first outer sliding door, the second outer sliding door, the first inner sliding door, and the second inner sliding door, it is located at the bottom and horizontally fixed to the floor.

[0004] However, in the above structure, the groove opening formed by the slide rail faces upwards, making it easy for debris to fall into the groove and difficult to clean. Summary of the Invention

[0005] To reduce the amount of debris falling into the grooves on the bottom frame, this application provides a concealed track thermally broken aluminum heavy-duty sliding door.

[0006] This application provides a concealed track thermal break aluminum heavy-duty sliding door, employing the following technical solution:

[0007] A concealed track aluminum alloy heavy-duty sliding door includes a bottom frame and a door body installed within the bottom frame. The bottom frame has an upward-opening mounting groove containing a track. The door body is slidably connected to the track. The door body includes at least two vertical side frames, each containing a cover plate. A tension spring is installed within each vertical side frame; one end of the tension spring is fixed to the side frame, and the other end is vertically fixed to one end of the cover plate. The end of the cover plate away from the tension spring extends from the side frame and is horizontally bent to cover the upward-facing opening of the mounting groove. The upper surface of the cover plate is flush with the upper part of the bottom frame. The end of the cover plate away from the tension spring is fixed to the end of the bottom frame. The two cover plates respectively cover the bottom frames on both sides of the door body. Fixed pulleys are provided at the bending positions of the cover plates to guide the bending of the cover plates.

[0008] By adopting the above technical solution, during use, the cover plates extend from inside the frame and the two cover plates respectively cover the bottom frame on both sides of the door body. This allows the upward-facing openings of the mounting slots on both sides of the door body to be covered by the cover plates. When the door body moves, one of the two cover plates gradually extends from inside the frame, while the other gradually retracts into the frame under the action of the tension spring. This ensures that the cover plates block the upward-facing openings of the mounting slots, thereby reducing the amount of debris falling into the mounting slots on the bottom frame. At the same time, since the force of the tension spring is transmitted to the door body through the cover plates and the fixed pulley, and the direction of the force exerted on the door body by the two cover plates through the tension spring is usually in the direction that the door body needs to move, the cover plates can also reduce the pulling force required for the door body to move, making it convenient for users to move the door body.

[0009] Preferably, sealing strips are provided on the inner walls of both sides of the mounting groove, and the sealing strips are used to abut against the side walls of both sides of the cover plate.

[0010] By adopting the above technical solution, the sealing strip is set on the inner wall on both sides of the mounting groove. When the cover plate is covering the mounting groove, the sealing strip abuts against the cover plate, thereby filling the gap between the cover plate and the inner wall of the mounting groove, further improving the sealing of the mounting groove and reducing the amount of debris falling into the mounting groove.

[0011] Preferably, the lower surface of the cover plate is provided with a support portion, the top of the track is provided with a noise reduction strip, the upper surface of the noise reduction strip is provided with an arc shape, and the lower part of the support portion is provided with an arc shape that cooperates with the noise reduction strip.

[0012] By adopting the above technical solution, the noise reduction strip can reduce the noise during the movement of the door. At the same time, the upper surface of the noise reduction strip is set in an arc shape, and the lower part of the support is set in an arc shape that matches the noise reduction strip, so that the support can deflect on the upper surface of the noise reduction strip, thereby reducing the damage to the cover plate caused by unilateral stepping.

[0013] Preferably, the support is a flexible magnetic strip, and a magnet is fixedly disposed on the track below the noise reduction strip.

[0014] By adopting the above technical solution, the support part is a flexible magnetic strip, so that when the cover plate is placed at the opening of the mounting groove, the support part is attracted by the magnet, so that the position of the cover plate and the mounting groove is stable and the cover plate is reduced from bulging upward. At the same time, the magnetic force of the magnet can automatically rotate the cover plate to a horizontal position after it is stepped on and rotated, which facilitates the reset of the cover plate.

[0015] Preferably, a locking assembly is provided above the fixed pulley. The locking assembly includes a pressure head, a guide rod, and a spring. The guide rod is vertically slidably connected to the frame. The pressure head is fixed to the lower end of the guide rod and is used to abut against the peripheral wall of the fixed pulley. The spring is sleeved on the guide rod and is used to apply a downward force to the pressure head. The guide rod is connected to a lock body for driving the guide rod to move up and down.

[0016] By adopting the above technical solution, the guide rod is slidably connected to the frame, the lower end of the guide rod is fixed to the pressure head, the force of the spring is applied to the pressure head, causing the pressure head to move downward and abut against the fixed pulley, thereby fixing the fixed pulley, thus fixing the door body, and allowing the door body to stop at any position along the length direction of the bottom frame.

[0017] Preferably, the lock body includes a main body, a rotating wheel, and a pull rope. The main body is fixed inside the frame, and a rotating shaft is rotatably connected to the main body. A handle is fixedly installed on the rotating shaft. One end of the pull rope is fixed to a guide rod, and the other end is connected to the rotating wheel. The rotating wheel is driven by the rotating shaft.

[0018] By adopting the above technical solution, when the handle is turned, the handle drives the rotating wheel to rotate through the rotating shaft, which in turn enables the rotating wheel to wind up the pull rope. The pull rope can pull the guide rod upward, causing the pressure head to disengage from the rotating wheel, allowing the door to move.

[0019] Preferably, a rotating wheel is provided at each of the two upper corners of the door body. The pull rope connected to the guide rod away from the rotating wheel passes through the two rotating wheels in sequence and is then connected to the rotating wheel. When the rotating wheel rotates, the two pull ropes are wound up or unwound simultaneously.

[0020] By adopting the above technical solution, the pull ropes on the guide rods on the door body, which are far from the rotating wheel, are connected to the rotating wheel after passing through two rotating wheels. Both pull ropes are retracted and extended through one rotating wheel, making it more convenient for users to move the door body.

[0021] Preferably, a protrusion is fixedly provided on the rotating shaft, and a stop block is provided at one end of the rotating wheel near the protrusion. When the protrusion abuts against the stop block, it drives the rotating wheel to wind up the rope. The rotating wheel is sleeved on the rotating shaft, and a ratchet is coaxially fixedly provided on the rotating wheel. The ratchet is connected to a pawl for one-way locking of the rotating wheel. The locking direction of the pawl on the ratchet is the rotation direction of the rotating wheel unwinding the rope.

[0022] By adopting the above technical solution, when the shaft rotates, the protrusion on the shaft abuts against the stop block, and then the stop block drives the rotating wheel to rotate. When the protrusion drives the rotating wheel to rotate through the stop block, the pull rope is wound up onto the rotating wheel, causing the guide rod to move upward. The ratchet is restricted by the pawl, keeping the guide rod in the position away from the fixed pulley, so that the user can move the door.

[0023] Preferably, a drive rod is fixedly mounted on the rotating shaft, and the pawl is rotatably connected to the main body. When the rotating shaft rotates, the drive rod is used to drive the pawl to rotate in the direction of releasing the ratchet. A torsion spring is connected to the pawl to drive the pawl to engage with the ratchet.

[0024] By adopting the above technical solution, the drive rod is fixed on the rotating shaft. When it is necessary to fix the fixed pulley by the pressure head, the drive rod is driven by the rotating shaft. The drive rod moves towards the pawl and drives the pawl to release the ratchet, so that the rotating wheel automatically unwinds the pull rope.

[0025] Preferably, the bottom frame and the track are integrally formed, and the bottom frame and the track are made of aluminum alloy profiles.

[0026] By adopting the above technical solution, the bottom frame and the track are integrated and both are made of aluminum alloy profiles, making the bottom frame and the track easy to install and convenient to install.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. The cover plates cover the upward-facing openings of the mounting slots on both sides of the door. When the door moves, one of the two cover plates gradually extends out from the frame, while the other gradually retracts into the frame under the action of the tension spring. This ensures that the cover plates seal the upward-facing openings of the mounting slots, thereby reducing the amount of debris falling into the mounting slots on the bottom frame.

[0029] 2. By using a flexible magnetic strip as the support, when the cover plate is placed over the opening of the mounting groove, the support is attracted by the magnet, which stabilizes the position of the cover plate and the mounting groove and reduces the upward bulging of the cover plate.

[0030] 3. When the stop block drives the rotating wheel to rotate, the pull rope is wound up onto the rotating wheel, causing the guide rod to move upward. The ratchet is restricted by the pawl, keeping the guide rod in the position away from the fixed pulley, so that the user can move the door. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0032] Figure 2 This is a schematic diagram showing the position of the tension spring in an embodiment of this application;

[0033] Figure 3 This is a schematic diagram of the installation structure of the locking component in an embodiment of this application;

[0034] Figure 4 This is a schematic diagram of the lock body in an embodiment of this application;

[0035] Figure 5This is a schematic diagram of the magnet installation position in an embodiment of this application.

[0036] Explanation of reference numerals in the attached drawings: 1. Bottom frame; 11. Mounting groove; 2. Door body; 21. Frame; 22. Glass; 23. Roller; 24. Rotary wheel; 3. Track; 4. Cover plate; 5. Fixed pulley; 6. Tension spring; 61. Mounting plate; 62. Connecting plate; 7. Locking assembly; 71. Mounting block; 72. Pressure head; 73. Guide rod; 74. Spring; 75. Guide hole; 8. Lock body; 81. Main body; 82. Rotating wheel; 821. Stop block; 83. Pull rope; 84. Rotating shaft; 841. Handle; 842. Protrusion; 85. Ratchet; 86. Pad; 87. Torsion spring; 88. Drive rod; 91. Sealing strip; 92. Support part; 93. Noise reduction strip; 94. Magnet. Detailed Implementation

[0037] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0038] This application discloses a concealed track thermal break aluminum heavy-duty sliding door, see reference. Figure 1 The system includes a bottom frame 1 and a door 2. The bottom frame 1 is installed in a pre-reserved groove in the floor, so that the upper part of the bottom frame 1 is flush with the upper surface of the floor. An upward-opening mounting groove 11 is formed on the bottom frame 1, and a track 3 is provided in the mounting groove 11. The track 3 is lower than the height of the bottom frame 1. The door 2 is installed on the track 3, and the lower part of the door 2 is inserted into the mounting groove 11, so that both sides of the lower part of the door 2 can be attached to the inner wall of the mounting groove 11. At the same time, a long strip cover plate 4 is provided at the opening of the mounting groove 11. One end of the cover plate 4 is fixed to the end of the bottom frame 1, and the other end is located inside the door 2. When the door 2 moves along the track 3, the cover plate 4 closes the position where the door 2 has moved away, so as to keep the opening of the mounting groove 11 outside the door 2 closed. At the same time, the upper surface of the cover plate 4 is flush with the upper surface of the bottom frame 1, so that the cover plate 4 hides the track 3 inside the mounting groove 11. It can also reduce the amount of debris falling into the mounting track from the opening of the mounting groove 11, which would affect the operation of the door 2 on the track 3.

[0039] refer to Figure 1 and Figure 2The cover plate 4 is made of a flexible material and can be bent arbitrarily along its length or arranged in a chain-like pattern along its length. In this embodiment, the cover plate 4 is made of rubber, and the portion of the cover plate 4 located within the mounting groove 11 is supported on top of the track 3. The door body 2 includes a frame 21 and glass 22. The frame 21 is made of thermally broken aluminum profile that can accommodate double-layer thermal insulation. The glass 22 has a double-layer hollow structure. The frame 21 is arranged around the glass 22, and a roller 23 is provided at the lower part of the frame 21 located at the bottom edge of the glass 22. The roller 23 is used to cooperate on the track 3 so that the roller 23 supports the door body 2. At least two rollers 23 are installed on one door body 2 along the length of the track 3. The middle of the cover plate 4 is bent at a 90-degree angle, so that one end of the cover plate 4 inside the door body 2 extends vertically upward to the frame 21. A fixed pulley 5 is provided at the bend of the cover plate 4, located on the upper surface of the cover plate 4, so that the fixed pulley 5 presses against the cover plate 4, and at the same time facilitates the bend of the cover plate 4 along the periphery of the fixed pulley 5. A cover plate 4 is provided in each of the two vertical frames 21 of the door body 2. The ends of the two cover plates 4 away from the door body 2 are respectively located at the two ends of the bottom frame 1, so that the two cover plates 4 respectively close the mounting grooves 11 on both sides of the door body 2. When the door body 2 moves along the track 3, one cover plate 4 gradually moves into the frame 21, and the other cover plate 4 gradually extends out from the frame 21, ensuring that the tracks 3 on both sides of the door body 2 are completely concealed. In this embodiment, two or three door bodies 2 and bottom frames 21 need to be used side by side.

[0040] refer to Figure 2Within the two vertical frame borders 21, tension springs 6 are installed. One end of each tension spring 6 is fitted with a mounting plate 61, which is fixed to the frame border 21. The upper end of the tension spring 6 hooks onto the mounting plate 61. A connecting plate 62 is installed at the lower end of the tension spring 6, fixed to the end of the cover plate 4 located within the frame border 21. The tension spring 6 hooks onto the connecting plate 62, causing the tension spring 6 to exert an upward force on the cover plate 4. The two tension springs 6 correspond one-to-one with the two cover plates 4. In use, when the door 2 moves to one end of the bottom frame 1, the force of one tension spring 6 is greater, while the force of the other tension spring 6 is smaller. Therefore, the tension generated by the two tension springs 6 on the two cover plates 4 is different. Furthermore, the cover plate 4 generates the same tension in its horizontal part through the fixed pulley 5. The force of the cover plate 4 acts on the door 2, thereby enabling the door 2 to receive a horizontal driving force. The direction of the driving force is the direction in which the door 2 moves towards the other end of the bottom frame 1. When the door 2 moves again, the force of the tension spring 6 can reduce the increase in tension required when the door 2 moves, making it easier for users to move the door 2. At the same time, when users move the door 2 while standing, the applied force is located in the middle of the door 2. The resistance between the heavy door 2 and the bottom frame 1 is greater. Therefore, applying the force from the bottom of the door 2 through the cover plate 4 makes it easier to drive the door 2 without causing the door 2 to get stuck in the bottom frame 1 due to rotation. Especially when the door 2 is in the closed position, it is usually inconvenient for the user to open or close it. At this time, the forces of the two tension springs 6 are at their maximum, which can reduce the difficulty for the user to open the door 2.

[0041] refer to Figure 2 and Figure 3 Locking components 7 are provided within the two vertical frame frames 21. The locking components 7 are located directly above the fixed pulley 5. The locking components 7 are used to abut against the side wall of the fixed pulley 5 to restrict the rotation of the fixed pulley 5. Due to the force of the tension spring 6, the cover plate 4 maintains the friction between itself and the fixed pulley 5. When the locking components 7 fix the fixed pulley 5, the door body 2 can no longer move along the bottom frame 1, so that the door body 2 can be fixed in any position by the locking components 7.

[0042] refer to Figure 3The locking assembly 7 includes a mounting block 71, a pressure head 72, a guide rod 73, and a spring 74. The mounting block 71 is fixed inside the vertical frame 21. A guide hole 75 is provided on the mounting block 71. The guide hole 75 is vertically arranged. The guide rod 73 is slidably connected in the guide hole 75, and both ends of the guide rod 73 pass through the mounting block 71. The cross-section of the guide rod 73 can be set to be rectangular. The pressure head 72 is fixed at the lower end of the guide rod 73. The pressure head 72 can be made of rubber material to make the friction between the pressure head 72 and the fixed pulley 5 greater. The spring 74 is sleeved on the guide rod 73 and is located below the mounting block 71, so that one end of the spring 74 abuts against the mounting block 71 and the other end abuts against the pressure head 72. The force of the spring 74 is used to press the pressure head 72 against the side wall of the fixed pulley 5, thereby fixing the fixed pulley 5 by the locking assembly 7.

[0043] refer to Figure 4 A lock body 8 is provided in the middle of the frame 21. The lock body 8 is connected to the locking assembly 7. The lock body 8 includes a main body 81, a rotating wheel 82, and a pull rope 83. The main body 81 is fixed to the frame 21. A rotating shaft 84 is provided on the main body 81. One end of the rotating shaft 84 extends from inside the frame 21 and is connected to a handle 841. The handle 841 is used to rotate the rotating shaft 84. The rotating wheel 82 is sleeved on the rotating shaft 84. A protrusion 842 for driving the rotating wheel 82 to rotate is fixedly provided on the rotating shaft 84. One end of the pull rope 83 is wound around the rotating wheel 82. The other end of the pull rope 83 is fixed to the upper end of the guide rod 73. Figure 2 There are two pull ropes 83. One pull rope 83 is fixedly connected downward to a guide rod 73, and the other pull rope 83 is upward and passes through two rotating wheels 24 in sequence. The rotating wheels 24 are rotatably installed at two corners on the upper part of the main body 81. The pull rope 83 passing through the two rotating wheels 24 is fixedly connected to the upper end of another guide rod 73, so that the two pull ropes 83 correspond one-to-one with the two guide rods 73. When the handle 841 drives the rotating wheel 82 to rotate through the protrusion 842, the rotating wheel 82 simultaneously winds the two pull ropes 83 onto the rotating wheel 82, thereby enabling the two guide rods 73 to move upward at the same time and unlocking the two fixed pulleys 5 at the same time, which facilitates the movement of the door body 2.

[0044] refer to Figure 4A ratchet 85 is fixedly mounted on one end of the rotating wheel 82, and a stop 821 is mounted on the other end. A protrusion 842 is mounted on the end of the rotating wheel 82 where the stop 821 is mounted. When the protrusion 842 abuts against the stop 821, the rotating wheel 82 rotates with the rotating shaft 84, and the maximum rotation angle of the rotating shaft 84 is set to 90 degrees so that the user can observe the position of the rotating shaft 84 to judge the state of the locking component 7. Thus, the protrusion 842 is only used to abut against the stop 821 in one direction to drive the rotating wheel 82 to rotate. The ratchet 85 is coaxial with the rotating wheel 82. A pawl 86 is mounted on the body 81. The pawl 86 cooperates with the ratchet 85 and is rotatably connected to the body 81. A torsion spring 87 is mounted between the pawl 86 and the body 81. One end of the torsion spring 87 is fixed to the body 81, and the other end can be fixed to the pawl 86. The force of the torsion spring 87 engages the pawl 86 in the ratchet 85. A drive rod 88 is also provided on the rotating shaft 84. The drive rod 88 is fixed on the rotating shaft 84 and is used to rotate with the rotating shaft 84. When the drive rod 88 rotates with the rotating shaft 84, the drive rod 88 abuts against the pawl 86. The force exerted by the drive rod 88 on the pawl 86 is opposite to the force exerted by the torsion spring 87 on the pawl 86. The drive rod 88 rotates the pawl 86 in the direction of disengaging from the ratchet 85. Thus, the ratchet 85 and the rotating wheel 82 automatically rotate after being pulled by the pull rope 83 and are locked to the fixed pulley 5 by the pressure head 72.

[0045] refer to Figure 5 The bottom frame 1 and track 3 are integrally formed and made of aluminum alloy profile. The track 3 is located in the middle of the bottom frame 1. Sealing strips 91 are provided on the inner walls of both sides of the mounting groove 11 formed by the bottom frame 1. The sealing strips 91 are used to abut against the sides of the door body 2 and the cover plate 4, so that the sealing strips 91 cooperate with the cover plate 4 to seal the bottom frame 1. A support part 92 is provided in the lower middle position of the cover plate 4. The support part 92 can be made of flexible magnetic strip and is integrally formed with the cover plate 4. A noise reduction strip 93 is fixedly installed on the top of the track 3. The noise reduction strip 93 is made of nylon material. The upper surface of the noise-reducing strip 93 is arc-shaped, and the lower part of the support 92 is arc-shaped to match the upper surface of the noise-reducing strip 93. A magnet 94 is fixed to the track 3 below the noise-reducing strip 93. The magnet 94 is used to attract the support 92, thereby keeping the cover plate 4 within the bottom frame 1, reducing the upward bulging of the cover plate 4, and also making it easier to position the cover plate 4 via the track 3 to prevent the cover plate 4 from tilting. When one side of the cover plate 4 is stepped on, the cover plate 4 can deflect around the upper surface of the noise-reducing strip 93, reducing damage to the cover plate 4 caused by being stepped on.

[0046] The usage process of this embodiment:

[0047] During the movement of the door 2, a cover plate 4 is gradually pulled out from the frame 21, causing the cover plate 4 to extend along with the tension spring 6. When the door 2 moves to the closed or open position, the tension spring 6 exerts a pulling force on the cover plate 4, which in turn acts on the door 2. Thus, when the door 2 changes from a stationary to a moving state, the tension spring 6 can save the user's pulling force, making it easier to move the door 2. When it is necessary to stop the door 2, turn the handle 841, which drives the rotating shaft 84. The drive rod 88 on the rotating shaft 84 releases the pawl 86 from the ratchet 85, so that the guide rod 73 automatically locks the fixed pulley 5 under the action of the spring 74. When it is necessary to move the door 2, turn the handle 841 in the opposite direction. The handle 841 drives the rotating wheel 82 through the protrusion 842 on the rotating shaft 84, which pulls up the guide rod 73 through the pull rope 83, and the pawl 86 locks the ratchet 85 to keep the door 2 movable.

[0048] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A concealed track thermally broken aluminum heavy-duty sliding door, comprising a bottom frame (1) and a door body (2) installed within the bottom frame (1), characterized in that: The bottom frame (1) has an upward-opening mounting groove (11), and a track (3) is provided in the mounting groove (11). The door body (2) is slidably connected to the track (3). The door body (2) includes at least two vertical frame sides (21). A cover plate (4) is provided in the two vertical frame sides (21). A tension spring (6) is provided in the vertical frame sides (21). One end of the tension spring (6) is fixed to the frame side (21), and the other end is vertically fixed to one end of the cover plate (4). The cover plate (4) The end of the cover plate (4) away from the tension spring (6) extends out from the frame (21) and is bent horizontally to cover the opening of the mounting groove (11) facing upward. The upper surface of the cover plate (4) is flush with the upper part of the bottom frame (1). The end of the cover plate (4) away from the tension spring (6) is fixed to the end of the bottom frame (1). The two cover plates (4) are respectively covered on the bottom frames (1) on both sides of the door body (2). A fixed pulley (5) is provided at the bending position of the cover plate (4). The fixed pulley (5) is used to guide the bending of the cover plate (4). A locking assembly (7) is provided above the fixed pulley (5). The locking assembly (7) includes a pressure head (72), a guide rod (73), and a spring (74). The guide rod (73) is vertically slidably connected to the frame (21). The pressure head (72) is fixed to the lower end of the guide rod (73) and is used to abut against the peripheral wall of the fixed pulley (5). The spring (74) is sleeved on the guide rod (73) and is used to apply a downward force to the pressure head (72). The guide rod (73) is connected to a lock body (8) for driving the guide rod (73) to move up and down. The lock body (8) includes a main body (81), a rotating wheel (82) and a pull rope (83). The main body (81) is fixed inside the frame (21). A rotating shaft (84) is rotatably connected to the main body (81). A handle (841) is fixedly installed on the rotating shaft (84). One end of the pull rope (83) is fixed to the guide rod (73), and the other end is connected to the rotating wheel (82). The rotating wheel (82) is driven by the rotating shaft (84).

2. The concealed track thermally broken aluminum heavy-duty sliding door according to claim 1, characterized in that: Sealing strips (91) are provided on the inner walls of both sides of the mounting groove (11), and the sealing strips (91) are used to abut against the side walls of both sides of the cover plate (4).

3. The concealed track thermally broken aluminum heavy-duty sliding door according to claim 2, characterized in that: The lower surface of the cover plate (4) is provided with a support part (92), the top of the track (3) is provided with a noise reduction strip (93), the upper surface of the noise reduction strip (93) is provided in an arc shape, and the lower part of the support part (92) is provided in an arc shape to cooperate with the noise reduction strip (93).

4. The concealed track thermally broken aluminum heavy-duty sliding door according to claim 3, characterized in that: The support (92) is a flexible magnetic strip, and a magnet (94) is fixedly installed on the track (3) below the noise reduction strip (93).

5. A concealed track thermally broken aluminum heavy-duty sliding door according to claim 1, characterized in that: The upper two corners of the door body (2) are respectively provided with a rotating wheel (24). The pull rope (83) connected to the guide rod (73) away from the rotating wheel (82) passes through the two rotating wheels (24) in sequence and then connects to the rotating wheel (82). When the rotating wheel (82) rotates, it simultaneously winds up or unwinds the two pull ropes (83).

6. A concealed track thermally broken aluminum heavy-duty sliding door according to claim 5, characterized in that: A protrusion (842) is fixedly provided on the rotating shaft (84). A stop (821) is provided at one end of the rotating wheel (82) near the protrusion (842). When the protrusion (842) abuts against the stop (821), it drives the rotating wheel (82) to wind up the pull rope (83). The rotating wheel (82) is sleeved on the rotating shaft (84). A ratchet (85) is fixedly provided on the rotating wheel (82) coaxially. The ratchet (85) is connected to a pawl (86) for one-way locking of the rotating wheel (82). The locking direction of the pawl (86) on the ratchet (85) is the rotation direction of the rotating wheel (82) unwinding the pull rope (83).

7. A concealed track thermally broken aluminum heavy-duty sliding door according to claim 6, characterized in that: A drive rod (88) is fixedly installed on the rotating shaft (84). The pawl (86) is rotatably connected to the body (81). When the drive rod (88) rotates with the rotating shaft (84), it is used to drive the pawl (86) to rotate in the direction of releasing the ratchet (85). A torsion spring (87) is connected to the pawl (86) for driving the pawl (86) to cooperate with the ratchet (85).

8. A concealed track thermally broken aluminum heavy-duty sliding door according to claim 1, characterized in that: The bottom frame (1) and the track (3) are integrally formed, and the bottom frame (1) and the track (3) are made of aluminum alloy profiles.

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