A demolition-free sound-absorbing reinforcing renovation decorative panel for external wall tiles

Abstract

The application discloses an outer wall ceramic tile demolition-free sound-absorbing reinforcing renovation decorative panel, and relates to the technical field of decorative panels, which comprises two cross beams, anchor rods arranged on the outer sides of the two cross beams, a plurality of positioning holes formed in the front sides of the cross beams, a bearing plate arranged on the front side of the cross beam, a fixed frame fixedly connected to the front side of the bearing plate, a sound-absorbing assembly fixedly connected to the inner side of the fixed frame, a decorative plate arranged on the front side of the fixed frame, a mounting unit arranged on the rear side of the bearing plate, and a plurality of positioning rods fixedly connected to the rear side of the bearing plate. The outer wall ceramic tile demolition-free sound-absorbing reinforcing renovation decorative panel is provided with cross beams, anchor rods, a bearing plate and a mounting frame, so that the cross beams can be conveniently mounted on the ceramic tiles, the limiting rods and the friction blocks on the two sides can be controlled to move by rotating the threaded rods, the decorative panel can be quickly mounted on the cross beams, and the decorative panel is convenient to mount and dismount.

Description

Technical Field

[0001] This invention relates to the field of decorative panel technology, specifically to a non-removable sound-absorbing and reinforcing decorative panel for exterior wall ceramic tiles. Background Technology

[0002] In many parts of the world, exterior wall tiling (fabricating bricks) has become the mainstream exterior decoration process for residential and public buildings due to its durability, ease of cleaning, and moderate cost. However, as these buildings age, they often experience a mid-life crisis, revealing systemic defects such as hollow and falling tiles (posing a safety hazard from falling objects), aging grout causing water seepage, outdated and unsightly appearance, and high energy consumption due to the lack of insulation. The traditional repair method is to completely remove the old tiles and redo the insulation and exterior walls. This method is extremely costly, time-consuming, generates a huge amount of construction waste, causes serious dust and noise pollution, and the high-risk high-altitude tile removal operation is prone to accidents.

[0003] The dry-hanging system of stone curtain walls has a history of several decades. Its core is to establish an independent metal keel support system outside the building structure. The panels are connected to the keel through hangers. The keel is installed on the outside of the exterior wall tiles, and the decorative panels are laid on the keel. It is economical and does not require the removal of tiles. However, there are two installation methods for the decorative panels. One is to install them directly with bolts, which is laborious. The other is to connect them with clips, which is convenient to install, but difficult to remove later.

[0004] Therefore, this invention proposes a non-removable sound-absorbing and reinforcing decorative panel for exterior wall ceramic tiles to solve the aforementioned problems. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a non-removable sound-absorbing and reinforcing decorative panel for exterior wall ceramic tiles, solving the problem of inconvenient installation and removal of decorative panels on exterior wall ceramic tiles.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A non-removable sound-absorbing and reinforcing decorative panel for exterior wall ceramic tiles includes two crossbeams. Anchor rods are installed on the outer sides of both crossbeams. Multiple positioning holes are provided on the front side of each crossbeam. A support plate is installed on the front side of each crossbeam. A fixing frame is fixedly connected to the front side of the support plate. A sound-absorbing component is fixedly connected to the inner side of the fixing frame. A decorative panel is installed on the front side of the fixing frame. An installation unit is installed on the rear side of the support plate. The installation unit includes multiple positioning rods, which are fixedly connected to the rear side of the support plate. Installation holes are provided on the outer sides of the positioning rods. An installation frame and multiple fixing blocks are fixedly connected to the rear side of the support plate. A movable rod is provided on the outer side of each fixing block. A movable block is fixedly connected to the outer end of the movable rod. A sliding rod is provided on the front side of the movable block. A limit rod is fixedly connected to the outer side of the sliding rod. Through holes are provided on both the upper and lower sides of the crossbeams.

[0007] Preferably, a control plate is fixedly connected to the end of the moving rods at both ends away from the moving block, and a rotating block one is fixedly connected to the outer side of each of the two control plates. An inclined plate is rotatably connected to the outer side of the rotating block one, and a rotating block two is rotatably connected to the outer side of the inclined plate. A control block is fixedly connected to the rear side of the rotating block two. A cover plate is fixedly connected to the rear side of the mounting frame, and a threaded rod is rotatably connected to the front side of the cover plate. The limiting rod is adapted to the mounting hole. A partition plate is fixedly connected to the inner side of the crossbeam. An adhesive frame is fixedly connected to the rear side of the cover plate. Protective covers are fixedly connected to both the upper and lower sides of the mounting frame.

[0008] Preferably, the front side of the threaded rod passes through the front side of the sound-absorbing assembly, the threaded rod is threadedly connected to the control block, a side block is fixedly connected to the outer side of the control block, a stabilizing rod is fixedly connected to the outer side of the cover plate, and the stabilizing rod is slidably connected to the side block.

[0009] Preferably, the sound-absorbing component includes a substrate, which is fixedly connected to the front side of the support plate, a concrete layer is fixedly connected to the front side of the substrate, and a fiber layer is fixedly connected to the front side of the concrete layer.

[0010] Preferably, the slide bar is slidably connected to the moving block, and a fixed rod is fixedly connected to the side of the moving block near the crossbeam, and a friction block is fixedly connected to the outer end of the fixed rod.

[0011] Preferably, a connecting rod is fixedly connected to the outer side of the sliding rod away from the limiting rod, a connecting block is fixedly connected to the rear side of the bearing plate, a horizontal rail is fixedly connected to the rear side of the connecting block, and an inclined rail is fixedly connected to the rear side of the horizontal rail. The connecting rod is slidably connected to the inclined rail and the horizontal rail.

[0012] Preferably, the bearing plate has reinforcing grooves on both the upper and lower sides, and a connecting block is provided on the inner side of the reinforcing grooves on both the upper and lower sides. A sliding groove is provided on the rear side of the bearing plate, and a sliding plate is slidably connected to the inner side of the sliding groove. The sliding plate is fixedly connected to the connecting block, and a rectangular plate is fixedly connected to the rear side of the sliding plate on both the upper and lower sides.

[0013] Preferably, movable plates are fixedly connected to the outer sides of the rectangular plates on both the upper and lower sides, and rear blocks are fixedly connected to the rear sides of the movable plates. A bidirectional screw is rotatably connected to the inner side of the mounting frame. The two ends of the bidirectional screw are provided with opposite threads. The two ends of the bidirectional screw are respectively threaded to the rear blocks on both sides. A gear is fixedly connected to the middle of the bidirectional screw. A fixing plate is fixedly connected to the outer side of the side block. A toothed plate that meshes with the gear is fixedly connected to the outer side of the fixing plate.

[0014] This invention provides a non-removable sound-absorbing and reinforcing decorative panel for exterior wall ceramic tile renovation. Compared with existing technologies, it has the following advantages: (1) The exterior wall ceramic tile non-removable sound-absorbing and reinforcing renovation decorative panel is equipped with a beam, anchor rod, bearing plate and installation frame, which makes it easy to install the beam on the ceramic tile. The limit rod and friction block on both sides are controlled by rotating the threaded rod, so that the decorative panel can be quickly installed on the beam. The installation and removal of the decorative panel is convenient.

[0015] (2) The exterior wall ceramic tile non-removable sound-absorbing and reinforced renovation decorative panel is equipped with moving blocks, sliding rods, connecting rods, inclined rails and horizontal rails, which facilitates the insertion of the limiting rod into the inner side of the installation hole, so that the limiting rod moves backward and the decorative panel is tightly attached to the beam, further improving the stability of the decorative panel installation.

[0016] (3) The exterior wall ceramic tile non-removable sound-absorbing and reinforced renovation decorative panel is equipped with a reinforcement groove, connecting block, sliding plate, rectangular plate and two-way screw, which facilitates the movement of the connecting block on the upper and lower sides during the installation of the decorative panel, so that the two decorative panels are connected together, further improving the overall stability of the decorative panel. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the crossbeam in this invention; Figure 3 This is a cross-sectional perspective view of the three-dimensional structure in this invention; Figure 4 This is a structural diagram of the sound-absorbing component in this invention; Figure 5 This is a partial exploded view of the support plate in this invention; Figure 6 for Figure 5Enlarged view of point A in the middle; Figure 7 for Figure 6 Enlarged view of point B in the middle; Figure 8 This is a partial three-dimensional structural diagram of the mounting unit in this invention; Figure 9 for Figure 8 Enlarged view of point C in the middle; Figure 10 This is a three-dimensional structural view of the mounting unit in this invention from another perspective.

[0018] In the diagram: 1. Anchor bolt; 2. Crossbeam; 3. Bearing plate; 4. Fixing frame; 5. Decorative panel; 6. Installation unit; 7. Positioning hole; 8. Partition plate; 9. Perforation; 10. Sound absorption component; 101. Base plate; 102. Concrete layer; 103. Fiber layer; 61. Positioning rod; 62. Installation frame; 63. Cover plate; 64. Bonding frame; 65. Protective cover; 67. Installation hole; 68. Reinforcing groove; 69. Slide groove; 610. Moving rod; 611. Moving block; 612. Slide rod; 613. Limiting rod; 614. Fixing rod; 6 15. Friction block; 616. Connecting rod; 617. Inclined track; 618. Horizontal track; 619. Connecting block; 620. Fixing block; 621. Control panel; 622. Bidirectional screw; 623. Rotating block one; 624. Inclined plate; 625. Rotating block two; 626. Control block; 627. Side block; 628. Stabilizing rod; 629. Threaded rod; 630. Fixing plate; 631. Gear; 632. Tooth plate; 633. Connecting block; 634. Slide plate; 635. Rectangular plate; 636. Moving plate; 637. Rear block. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] This invention provides the following technical solutions: Example

[0021] Please see Figure 1 - Figure 8A non-removable sound-absorbing and reinforcing decorative panel for exterior wall ceramic tiles includes two horizontal beams 2, each with an anchor rod 1 on its outer side. Multiple positioning holes 7 are provided on the front side of each horizontal beam 2. A bearing plate 3 is provided on the front side of the horizontal beam 2, and a fixing frame 4 is fixedly connected to the front side of the bearing plate 3. A sound-absorbing component 10 is fixedly connected to the inner side of the fixing frame 4. A decorative panel 5 is provided on the front side of the fixing frame 4. An installation unit 6 is provided on the rear side of the bearing plate 3, and the installation unit 6 includes multiple positioning rods 61. The positioning rods 61 are fixedly connected to the rear side of the bearing plate 3, and mounting holes 67 are provided on the outer side of each positioning rod 61. The rear side of the beam 3 is fixedly connected to the mounting frame 62 and multiple fixing blocks 620. The outer side of the fixing block 620 is provided with a moving rod 610. The outer end of the moving rod 610 is fixedly connected to a moving block 611. The front side of the moving block 611 is provided with a sliding rod 612. The outer side of the sliding rod 612 is fixedly connected to a limit rod 613. The inner side of the beam 2 is fixedly connected to a partition plate 8. When installing decorative panels on exterior wall tiles, the panels are first installed in the mortar layer of the tiles through anchor rods 1. Then, the anchor rods 1 and the beam 2 are installed together. Then, the bearing plate 3 is installed in the beam 2 through the mounting unit 6 to facilitate attraction and reinforcement operations.

[0022] A control plate 621 is fixedly connected to the end of the two moving rods 610 away from the moving block 611. Rotating blocks 623 are fixedly connected to the outer sides of both control plates 621. An inclined plate 624 is rotatably connected to the outer side of rotating blocks 623. A rotating block 625 is rotatably connected to the outer side of the inclined plate 624. A control block 626 is fixedly connected to the rear side of rotating blocks 625. A cover plate 63 is fixedly connected to the rear side of the mounting frame 62. A threaded rod 629 is rotatably connected to the front side of the cover plate 63. The limiting rod 613 is connected to the mounting hole. 67. The threaded rod 629 passes through the front of the sound-absorbing assembly 10. The threaded rod 629 is threadedly connected to the control block 626. A side block 627 is fixedly connected to the outer side of the control block 626. A stabilizing rod 628 is fixedly connected to the outer side of the cover plate 63. The stabilizing rod 628 is slidably connected to the side block 627. An adhesive frame 64 is fixedly connected to the rear side of the cover plate 63. The adhesive frame 64 is bonded to the ceramic tile. Protective covers 65 are fixedly connected to both the upper and lower sides of the mounting frame 62. The decorative panel 5 is... The glue connects the fixed frame 4 together. When installing the decorative panel, first insert the positioning rod 61 into the inside of the crossbeam 2 through the positioning hole 7. At this time, the bearing plate 3 is not tightly connected to the crossbeam 2. Use a tool to rotate the threaded rod 629. The threaded rod 629 drives the control block 626 to move forward. The control block 626 drives the inclined plate 624 to rotate. The inclined plate 624 drives the control plate 621 on the rotating block 623 to move. Since the inclined plates 624 on both sides are symmetrically distributed, the control plates 621 on both sides move away from each other. 621 drives the moving rod 610 to move, the moving rod 610 drives the moving block 611 to move, and the moving block 611 drives the limiting rod 613 to move closer to the crossbeam 2. The limiting rod 613 enters the inner side of the crossbeam 2 through the through hole 9 and enters the inner side of the mounting hole 67, so that the positioning rod 61 is limited. Since the limiting rods 613 on both sides pass through the positioning rod 61 at the same time, it is convenient to quickly install the bearing plate 3. When disassembling, the decorative plate 5 is removed and the threaded rod 629 is rotated in the opposite direction. The operation is simple.

[0023] The sound-absorbing component 10 includes a substrate 101, which is fixedly connected to the front side of the support plate 3. A concrete layer 102 is fixedly connected to the front side of the substrate 101, and a fiber layer 103 is fixedly connected to the front side of the concrete layer 102. The fiber layer 103 and the concrete layer 102 work together to facilitate the absorption of external sound and improve the absorption effect.

[0024] The sliding rod 612 is slidably connected to the moving block 611. The moving block 611 is fixedly connected to the side near the crossbeam 2 with a fixed rod 614. The outer end of the fixed rod 614 is fixedly connected to a friction block 615. When installing the decorative panel, the moving block 611 drives the fixed rod 614 to move, and the fixed rod 614 drives the friction block 615 to move, so that the friction blocks 615 on the upper and lower sides are close to the crossbeam 2, further improving the installation stability.

[0025] A connecting rod 616 is fixedly connected to the outer side of the end of the slide rod 612 away from the limiting rod 613. A connecting block 619 is fixedly connected to the rear side of the bearing plate 3. A horizontal rail 618 is fixedly connected to the rear side of the connecting block 619. An inclined rail 617 is fixedly connected to the rear side of the horizontal rail 618. The connecting rod 616 is slidably connected to both the inclined rail 617 and the horizontal rail 618. When the limiting rod 613 moves to the inner side of the mounting hole 67, the moving block 611 drives the connecting rod 616 to move. The connecting rod 616 moves to the inner side of the inclined rail 617. At this time, the moving rod 610 continues to move. Under the action of the inclined rail 617, the connecting rod 616 drives the slide rod 612 to move backward. The slide rod 612 drives the limiting rod 613 to move backward. The limiting rod 613 drives the positioning rod 61 to move backward. The positioning rod 61 drives the bearing plate 3 to move backward, so that the bearing plate 3 and the crossbeam 2 fit tightly together, further improving the stability of the decorative panel installation. Example

[0026] Based on Example 1, such as Figure 9 , Figure 10 As shown, the upper and lower sides of the bearing plate 3 are provided with reinforcing grooves 68, and the inner side of the upper and lower reinforcing grooves 68 is provided with a connecting block 633. The rear side of the bearing plate 3 is provided with a sliding groove 69, and the inner side of the sliding groove 69 is slidably connected to a sliding plate 634. The sliding plate 634 is fixedly connected to the connecting block 633. The rear side of the upper and lower sliding plates 634 is fixedly connected to a rectangular plate 635. The outer side of the upper and lower rectangular plates 635 is fixedly connected to a movable plate 636. The rear side of the movable plate 636 is fixedly connected to a rear block 637. The inner side of the mounting frame 62 is rotatably connected to a double-acting screw 622. The two ends of the double-acting screw 622 are provided with opposite threads. The two ends of the double-acting screw 622 are respectively threaded to the two rear blocks 637. The middle part of the double-acting screw 622 is fixedly connected to a gear 631. The outer side of the side block 627 is fixedly connected to a fixing plate 630. A toothed plate 632, which meshes with a gear 631, is fixedly connected to the outer side. When installing the decorative panel, a piece with a connecting block 633 is attached to two pieces without connecting blocks 633. At the same time, the control block 626 drives the side block 627 to move, the side block 627 drives the fixing plate 630 to move, the fixing plate 630 drives the toothed plate 632 to move, the toothed plate 632 drives the gear 631 to rotate, the gear 631 drives the double-acting screw 622 to rotate, the double-acting screw 622 drives the rear block 637 to move, the rear block 637 drives the moving plate 636 to move, the moving plate 636 drives the rectangular plate 635 to move, the rectangular plate 635 drives the sliding plate 634 to move, and the sliding plate 634 drives the connecting block 633 to move, so that the connecting block 633 moves to the inside of the reinforcing groove 68 of the other piece, so that the two decorative panels are installed together, improving the overall stability of the decorative panel installation.

[0027] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0028] During operation, the crossbeam 2 is first installed on the exterior wall using anchor rod 1. Then, the bearing plate 3 is placed on the crossbeam 2, allowing the positioning rod 61 to insert into the crossbeam 2. Next, the threaded rod 629 is rotated to move the control block 626. Under the action of the inclined plate 624 and the control plate 621, the moving rod 610 moves. The moving rod 610 moves the limiting rod 613 on the moving block 611, causing the limiting rods 613 on both the upper and lower sides to insert into the positioning rod 61, allowing the decorative panel to be installed quickly. When the limiting rod 613 is fully inserted into the inner side of the mounting hole 67, under the action of the connecting rod 616 and the inclined track 617, the limiting rod 613 moves the positioning rod 61 backward. The support plate 3 is moved backward to further improve the stability of the decorative panel. At the same time, the two decorative panels without the connecting block 633 are attached to the decorative panel with the connecting block 633. At this time, the side block 627 drives the fixing plate 630 to move the toothed plate 632. The toothed plate 632 drives the gear 631 to rotate. The gear 631 drives the double-headed screw 622 to rotate. The double-headed screw 622 drives the moving plate 636 on the rear block 637 to move. The moving plate 636 drives the rectangular plate 635 to move. The rectangular plate 635 drives the connecting block 633 on the sliding plate 634 to move, so that the connecting block 633 is inserted into the reinforcing groove 68 of the other support plate 3, making the installation of the two decorative panels more stable.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A non-removable sound-absorbing and reinforcing decorative panel for exterior wall ceramic tiles, comprising two crossbeams (2), characterized in that: Anchor rods (1) are provided on the outer sides of both crossbeams (2). Multiple positioning holes (7) are provided on the front side of the crossbeams (2). A bearing plate (3) is provided on the front side of the crossbeams (2). A fixing frame (4) is fixedly connected to the front side of the bearing plate (3). A sound-absorbing component (10) is fixedly connected to the inner side of the fixing frame (4). A decorative panel (5) is provided on the front side of the fixing frame (4). An installation unit (6) is provided on the rear side of the bearing plate (3). The installation unit (6) includes multiple positioning rods (61). The positioning rods (61) are fixedly connected to the bearing plate. On the rear side of the carrier plate (3), an installation hole (67) is provided on the outer side of the positioning rod (61). An installation frame (62) and multiple fixing blocks (620) are fixedly connected to the rear side of the carrier plate (3). A moving rod (610) is provided on the outer side of the fixing block (620). A moving block (611) is fixedly connected to the outer end of the moving rod (610). A sliding rod (612) is provided on the front side of the moving block (611). A limit rod (613) is fixedly connected to the outer side of the sliding rod (612). Through holes (9) are provided on both the upper and lower sides of the crossbeam (2).

2. The exterior wall ceramic tile non-removable sound-absorbing reinforcement and renovation decorative panel according to claim 1, characterized in that: A control plate (621) is fixedly connected to the end of the moving rod (610) away from the moving block (611). A rotating block (623) is fixedly connected to the outer side of the control plate (621) on both sides. An inclined plate (624) is rotatably connected to the outer side of the rotating block (623). A rotating block (625) is rotatably connected to the outer side of the inclined plate (624). A control block (626) is fixedly connected to the rear side of the rotating block (625). A cover plate (63) is fixedly connected to the rear side of the mounting frame (62). A threaded rod (629) is rotatably connected to the front side of the cover plate (63). The limiting rod (613) is adapted to the mounting hole (67). A partition plate (8) is fixedly connected to the inner side of the crossbeam (2). An adhesive frame (64) is fixedly connected to the rear side of the cover plate (63). Protective covers (65) are fixedly connected to the upper and lower sides of the mounting frame (62).

3. The exterior wall ceramic tile non-removable sound-absorbing reinforcement and renovation decorative panel according to claim 2, characterized in that: The front side of the threaded rod (629) passes through the front side of the sound-absorbing assembly (10). The threaded rod (629) is threadedly connected to the control block (626). A side block (627) is fixedly connected to the outside of the control block (626). A stabilizing rod (628) is fixedly connected to the outside of the cover plate (63). The stabilizing rod (628) is slidably connected to the side block (627).

4. The exterior wall ceramic tile non-removable sound-absorbing reinforcement and renovation decorative panel according to claim 1, characterized in that: The sound-absorbing component (10) includes a substrate (101), which is fixedly connected to the front side of the support plate (3). A concrete layer (102) is fixedly connected to the front side of the substrate (101), and a fiber layer (103) is fixedly connected to the front side of the concrete layer (102).

5. The exterior wall ceramic tile non-removable sound-absorbing reinforcement and renovation decorative panel according to claim 3, characterized in that: The slide bar (612) is slidably connected to the moving block (611), and a fixed rod (614) is fixedly connected to the side of the moving block (611) near the crossbeam (2), and a friction block (615) is fixedly connected to the outer end of the fixed rod (614).

6. The exterior wall ceramic tile non-removable sound-absorbing reinforcement and renovation decorative panel according to claim 5, characterized in that: A connecting rod (616) is fixedly connected to the outer side of the sliding rod (612) away from the limiting rod (613). A connecting block (619) is fixedly connected to the rear side of the bearing plate (3). A horizontal rail (618) is fixedly connected to the rear side of the connecting block (619). An inclined rail (617) is fixedly connected to the rear side of the horizontal rail (618). The connecting rod (616) is slidably connected to both the inclined rail (617) and the horizontal rail (618).

7. The exterior wall ceramic tile non-removable sound-absorbing and reinforcing renovation decorative panel according to claim 6, characterized in that: The upper and lower sides of the bearing plate (3) are provided with reinforcing grooves (68), and the inner sides of the upper and lower reinforcing grooves (68) are provided with connecting blocks (633). The rear side of the bearing plate (3) is provided with a sliding groove (69), and the inner side of the sliding groove (69) is slidably connected with a sliding plate (634). The sliding plate (634) is fixedly connected to the connecting block (633), and the rear sides of the upper and lower sliding plates (634) are fixedly connected with rectangular plates (635).

8. The exterior wall ceramic tile non-removable sound-absorbing reinforcement and renovation decorative panel according to claim 7, characterized in that: Movable plates (636) are fixedly connected to the outer sides of the rectangular plates (635) on both the top and bottom sides. Rear blocks (637) are fixedly connected to the rear sides of the movable plates (636). A bidirectional screw (622) is rotatably connected to the inner side of the mounting frame (62). The two ends of the bidirectional screw (622) are provided with opposite threads. The two ends of the bidirectional screw (622) are respectively threaded to the rear blocks (637) on both sides. A gear (631) is fixedly connected to the middle of the bidirectional screw (622). A fixing plate (630) is fixedly connected to the outer side of the side block (627). A toothed plate (632) that meshes with the gear (631) is fixedly connected to the outer side of the fixing plate (630).

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