A clamping mechanism for a multi-layer negative pressure machine

Abstract

This utility model discloses a clamping mechanism for a multi-layer negative pressure machine, including a base plate for mounting on each layer. A swing arm hook is rotatably connected to the base plate, and a fixed post is provided at the bottom of the base plate. The swing arm hook has a hook portion, and a drive source is provided on the base plate to drive the swing arm hook to rotate. The drive source drives the swing arm hook to rotate so that the hook portion hooks onto the fixed post on the base plate of the adjacent layer, thereby pressing and fixing it. After the adjacent layers are stacked, the swing arm hook is driven to rotate by a drive cylinder, and the hook portion at the end of the swing arm hook hooks onto the fixed post on the base plate of the adjacent layer, thereby achieving further pressing and fixing. This further clamps and fixes the adjacent layers together, thereby effectively preventing the layers from sagging and deforming due to the large weight of the placed plates, which would affect the sealing of the connection, and effectively preventing air leakage caused by the vacuuming process.

Description

Technical Field

[0001] This utility model relates to the field of negative pressure machines, and in particular to a clamping mechanism for a multi-layer negative pressure machine. Background Technology

[0002] A negative pressure machine is a device that operates using negative pressure (i.e., pressure lower than atmospheric pressure) and is widely used in many fields such as industrial production, medical care, environmental protection, and food processing.

[0003] RVs, refrigerated trucks, vans, or other special-purpose vehicles need to have insulation functions. The body panels consist of panels, insulation layers, and panels glued together in sequence. To ensure good bonding during the production process, the body panels are usually placed in a multi-layer negative pressure machine, where air is removed by vacuuming, ultimately improving the bonding quality.

[0004] A search of Chinese Patent Publication No. CN207931250U reveals a multi-layer vacuum adhesion mechanism, comprising multiple adhesion platforms for placing wall panels and a vacuum device for extracting air from the adhesion platforms. The vacuum device includes a vacuum membrane covering the adhesion platforms, and a mounting structure for fixing the vacuum membrane is provided between the vacuum membrane and the adhesion platforms. This multi-layer vacuum adhesion mechanism can improve the adhesion between different layers of the wall panel.

[0005] However, in actual production applications, we encounter situations where the cargo box panels of refrigerated trucks are very heavy. When these panels are placed on the shelves of a multi-layer negative pressure machine, the shelves may sag and deform, causing the gap between the upper and lower shelves to widen, the sealing effect to deteriorate, and air leakage to occur, ultimately making it impossible to perform vacuuming operations. Utility Model Content

[0006] To further prevent air leakage during the use of the negative pressure machine, this application provides a clamping mechanism for a multi-layer negative pressure machine.

[0007] This application provides a clamping mechanism for a multi-layer negative pressure machine, which adopts the following technical solution:

[0008] A clamping mechanism for a multi-layer negative pressure machine includes a base plate for mounting on each layer, a swing arm hook rotatably connected to the base plate, a fixing post provided at the bottom of the base plate, the swing arm hook having a hook portion, and a drive source provided on the base plate for driving the swing arm hook to rotate, the drive source driving the swing arm hook to rotate such that the hook portion hooks onto the fixing post on the base plate of the adjacent layer.

[0009] Optionally, the middle part of the swing arm hook is rotatably connected to the base plate, and the end of the swing arm hook away from the hook part is the driving end, and the driving source is connected to the driving end.

[0010] Optionally, the driving source includes a driving cylinder, one end of the cylinder body of the driving cylinder is hinged to the base plate, and the end of the piston rod of the driving cylinder is hinged to the driving end.

[0011] Optionally, the distance from the hinge point of the drive end to the rotation center of the swing arm hook is greater than the distance from the hook pressing point to the rotation center of the swing arm hook.

[0012] Optionally, the substrate is L-shaped and has a pressing portion at the lower end, and the top of the substrate has a supporting portion, which is used to abut against the pressing portion of the substrate on the adjacent layer.

[0013] Optionally, a bearing is installed on the fixing post, and the bearing is used to abut against the hook.

[0014] Optionally, the hook is used to engage with the inner wall of the pressing part, which is an inclined surface.

[0015] Optionally, the hook has an arcuate surface for avoiding the bearing.

[0016] Optionally, the piston rod end of the drive cylinder is threadedly connected to a hinge, and the drive end is hinged to the hinge.

[0017] Optionally, the width of the hook gradually decreases from the rotation center near the swing arm hook to the other end.

[0018] In summary, this application includes at least one of the following beneficial technical effects:

[0019] 1. After the adjacent shelves are stacked, the swing arm hook is driven to rotate by the drive cylinder. The hook at the end of the swing arm hook hooks onto the fixing post on the substrate of the adjacent shelf, thereby achieving further clamping and fixing. This further clamps and fixes the adjacent shelves together, effectively preventing the shelves from sagging and deforming due to the large weight of the board material, which would affect the sealing of the connection and effectively prevent air leakage caused by the vacuuming process.

[0020] 2. Only one drive cylinder is needed to drive the swing arm hook to press and release the fixed column on the adjacent platform by rotating it, making the structure more compact and simple.

[0021] 3. The lever arm length on the side of the swing arm hook closer to the drive end is greater than that on the other end. This way, the clamping force applied by the drive cylinder can be effectively increased through the lever arm transmission, ultimately increasing the actual clamping force applied to the fixed column.

[0022] 4. The fixed column bearing can reduce frictional resistance and facilitate the movement of the hook part of the swing arm along the bearing during rotation, thus improving the smoothness of rotation. Attached Figure Description

[0023] Figure 1This is a structural diagram of an embodiment of this application when the swing arm hook is in the released state.

[0024] Figure 2 This is a structural diagram of an embodiment of this application when the swing arm hook is in a pressed state.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Substrate; 2. Shelf; 3. Swing arm hook; 4. Fixing column; 5. Hook; 6. Drive end; 7. Drive cylinder; 8. Piston rod; 9. Pressing part; 10. Support part; 11. Bearing; 12. Inclined surface; 13. Curved surface; 14. Hinge. Detailed Implementation

[0027] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0028] A clamping mechanism for a multi-layer negative pressure machine, such as Figure 1 and Figure 2 As shown, the multilayer negative pressure machine includes a base plate 1 and multiple vertically stacked platforms 2. Sealing gaskets are provided between each platform 2 to ensure good sealing at the connection. The base plate 1 is fixed on the side wall of each platform 2. The base plate 1 and the platform 2 are arranged in a one-to-one correspondence. Each base plate 1 is provided with a swing arm hook 3 and a drive source. The base plate 1 is L-shaped and a fixing post 4 is installed at its bottom. The middle part of the swing arm hook 3 is rotatably connected to the base plate 1. One end of the swing arm hook 3 has a hook part 5 and the other end is a drive end 6. The drive source is connected to the drive end 6 to drive the swing arm hook 3 to rotate. In actual use, the drive source drives the swing arm hook 3 to rotate, so that the hook part 5 of the swing arm hook 3 rotates to the fixing post 4 of the base plate 1 on the adjacent upper platform 2 and presses it. This achieves further pressing and fixing between adjacent platforms 2.

[0029] This effectively prevents the shelf 2 from sagging and deforming, thus ensuring the airtightness between the shelves and preventing air leakage during the vacuuming process, even when the weight of the boards placed on shelf 2 is relatively heavy.

[0030] like Figure 1 and Figure 2 As shown, the driving source includes a driving cylinder 7. One end of the cylinder body of the driving cylinder 7 is hinged to the base plate 1, and the end of the piston rod 8 of the driving cylinder 7 is hinged to the driving end 6 of the swing arm hook 3. In this way, the extension and retraction of the piston rod 8 can drive the rotation of the swing arm hook 3 to realize the pressing and releasing of the hook part 5 on the fixed column 4. Thus, only one driving cylinder 7 is needed to drive the swing arm hook 3 to press and release the fixed column 4 on the adjacent platform 2 by rotation, making the structure more compact and simple.

[0031] like Figure 1 and Figure 2As shown, in this embodiment, the distance from the hinge point of the drive end 6 to the rotation center of the swing arm hook 3 is greater than the distance from the pressing point of the hook part 5 to the rotation center of the swing arm hook 3. This makes the lever arm of the drive end 6 longer during the driving process, and the force transmitted to the pressing point of the hook part 5 can be greater in actual use, and effectively reduces the requirement for the magnitude of the driving source force.

[0032] like Figure 1 and Figure 2 As shown, a pressing part 9 is provided at the lower end of the substrate 1, and a support part 10 corresponding to the pressing part 9 is provided at the top of the substrate 1. When the layers 2 are stacked, the pressing part 9 abuts against the support part 10 of the substrate 1 on the adjacent lower layer 2. In this way, the support part 10 on the lower layer 2 can effectively support the upper layer 2 in sequence, further reducing the phenomenon of the layer 2 sagging and deformation affecting the sealing performance.

[0033] like Figure 1 and Figure 2 As shown, bearings 11 are installed on each fixed column 4. The outer wall of the bearing 11 is used to abut against the hook part 5 of the swing arm hook 3. The bearing 11 on the fixed column 4 can reduce frictional resistance and facilitate the movement of the hook part 5 of the swing arm hook 3 along the bearing 11 during rotation, thereby improving the smoothness of rotation.

[0034] like Figure 1 and Figure 2 As shown, the inner wall of the hook 5 used to press against the bearing 11 is an inclined surface 12. The inclined surface 12 facilitates the rotation of the hook 5 to hook the bearing 11 on the fixed column 4, and facilitates the rotation of the hook 5 to press the bearing 11, reducing interference and jamming. In addition, an arc surface 13 is provided on the hook 5 to avoid the bearing 11. The design of the arc surface 13 provides a large space for the bearing 11, thus ensuring that the rotation of the swing arm hook 3 is smooth and avoiding interference between the bearing 11 and the hook 5.

[0035] like Figure 1 and Figure 2 As shown, the width of the hook 5 gradually decreases from the rotation center near the swing arm hook 3 to the other end. This allows the hook 5 to avoid internal space while maintaining effective structural strength. During use, the end of the hook 5 near the rotation center is less likely to break or break.

[0036] like Figure 1 and Figure 2 As shown, a hinge 14 is threadedly connected to the end of the piston rod 8 of the drive cylinder 7, and the drive end 6 is hinged to the hinge 14. In actual use, this threaded connection allows for fine-tuning of the length by rotating the hinge 14, thereby improving applicability and practicality and meeting the needs of more occasions.

[0037] 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 clamping mechanism for a multi-layer negative pressure machine, characterized by: Includes a base plate (1) for mounting on each shelf (2), a swing arm hook (3) is rotatably connected to the base plate (1), a fixing post (4) is provided at the bottom of the base plate (1), the swing arm hook (3) has a hook part (5), and a drive source is provided on the base plate (1) to drive the swing arm hook (3) to rotate, the drive source drives the swing arm hook (3) to rotate so that the hook part (5) hooks onto the fixing post (4) on the base plate (1) of the adjacent shelf (2).

2. The clamping mechanism of a multi-layer negative pressure machine according to claim 1, characterized in that: The middle part of the swing arm hook (3) is rotatably connected to the base plate (1), and the end of the swing arm hook (3) away from the hook part (5) is the driving end (6), and the driving source is connected to the driving end (6).

3. The clamping mechanism of a multi-layer negative pressure machine according to claim 2, characterized in that: The driving source includes a driving cylinder (7), one end of the cylinder body of the driving cylinder (7) is hinged to the base plate (1), and the end of the piston rod (8) of the driving cylinder (7) is hinged to the driving end (6).

4. The clamping mechanism of a multi-layer negative pressure machine according to claim 2, characterized in that: The distance from the hinge point of the drive end (6) to the rotation center of the swing arm hook (3) is greater than the distance from the pressing point of the hook part (5) to the rotation center of the swing arm hook (3).

5. The clamping mechanism of a multi-layer negative pressure machine according to claim 1, characterized in that: The substrate (1) is L-shaped and has a pressing part (9) at the lower end. The top of the substrate (1) has a support part (10). The support part (10) is used to abut against the pressing part (9) of the substrate (1) on the adjacent platform (2).

6. The clamping mechanism of a multi-layer negative pressure machine according to claim 1, characterized in that: A bearing (11) is installed on the fixed column (4), and the bearing (11) is used to abut against the hook (5).

7. The clamping mechanism of a multi-layer negative pressure machine according to claim 1 or 6, characterized in that: The hook (5) is used to hook the inner wall of the pressing part, which is an inclined surface (12).

8. The clamping mechanism of a multi-layer negative pressure machine according to claim 6, characterized in that: The hook (5) has an arc surface (13) for avoiding the bearing (11).

9. The clamping mechanism of a multi-layer negative pressure machine according to claim 3, characterized in that: The piston rod (8) of the drive cylinder (7) is threadedly connected to a hinge (14), and the drive end (6) is hinged to the hinge (14).

10. The clamping mechanism of a multi-layer negative pressure machine according to claim 1, characterized in that: The width of the hook (5) gradually decreases from the rotation center near the swing arm hook (3) to the other end.

Images