A clamping mechanism for a box and a lid

Abstract

The present application relates to a kind of clamping mechanism of box and lid, belong to the field of handling machinery, solve the problem that box and lid cannot be quickly clamped or released in prior art.The present application includes tensioning assembly, adjusting assembly and compression assembly, the adjusting assembly is set on tensioning assembly, and is connected with compression assembly, so that tensioning assembly is connected with compression assembly;The compression assembly is fixedly connected with the lid of packaging box, and the tensioning assembly is fixedly connected with the box of packaging box, by moving compression assembly, so that tensioning assembly is tightened or separated from compression assembly, for quickly clamping or releasing box and lid.The present application realizes the quick clamping or release of box and lid, and it is easy to operate, time-saving and labor-saving.

Description

Technical Field

[0001] This invention relates to the field of loading and unloading machinery, and more particularly to a clamping mechanism for a box body and a box cover. Background Technology

[0002] Precision instruments and equipment often require moisture protection during transportation or storage. A common moisture-proofing measure is to place the precision instruments and equipment in a packaging box, press and seal the box body and lid, and then fill the box with dry gas to make the air pressure inside the box greater than the external atmospheric pressure, thereby preventing external humid air from entering the box and achieving moisture protection.

[0003] The existing clamping method for the box body and lid involves drilling a ring of bolts at the connection between the box body and lid. Tightening these bolts clamps the box body and lid together, maintaining a certain clamping force to ensure the sealing ring between the box body and lid seals the packaging box, preventing gas leakage and thus preventing external humid air from entering. However, using bolt clamping requires tightening or loosening each bolt individually, making it impossible to quickly clamp or release the box body and lid. This method is time-consuming, labor-intensive, and inconvenient. Summary of the Invention

[0004] Based on the above analysis, the present invention aims to provide a clamping mechanism for the box body and the box lid, so as to solve the problem that the box body and the box lid cannot be quickly clamped or loosened in the prior art.

[0005] The objective of this invention is mainly achieved through the following technical solutions:

[0006] A clamping mechanism for a box body and a box lid includes a tensioning component, an adjusting component, and a pressing component. The adjusting component is sleeved on the tensioning component and connected to the pressing component, thereby connecting the tensioning component and the pressing component. The pressing component is fixedly connected to the box lid, and the tensioning component is fixedly connected to the box body. By moving the pressing component, the tensioning component can be tightened or disengaged from the pressing component, for quickly clamping or loosening the box body and the box lid.

[0007] Furthermore, the tensioning assembly includes a first base and a pull rod.

[0008] Furthermore, the tie rod is hinged to the first base.

[0009] Furthermore, the pull rod has a threaded end and a connecting end.

[0010] Furthermore, a keyway is provided on the threaded end.

[0011] Furthermore, the keyway is oblong.

[0012] Furthermore, the clamping assembly includes a rocker arm, a second base, and a safety pin, wherein the rocker arm and the second base are hinged together.

[0013] Furthermore, the rocker arm includes a cam; the second base includes a mounting lug.

[0014] Furthermore, the cam is provided with a first pin hole; the mounting lug is provided with a second pin hole.

[0015] Furthermore, the safety pin can be inserted into the second pin hole and the first pin hole in sequence to prevent the rocker arm from rotating relative to the second base.

[0016] The technical solution of this invention can achieve at least one of the following effects:

[0017] (1) The present invention provides a clamping mechanism for a box body and a box lid, comprising a tensioning component, an adjusting component, and a pressing component. The adjusting component is sleeved on the tensioning component and connected to the pressing component, thereby connecting the tensioning component and the pressing component. The pressing component is fixedly connected to the box lid of the packaging box, and the tensioning component is fixedly connected to the box body of the packaging box. By moving the pressing component, the tensioning component can be tightened or disengaged from the pressing component, which is used to quickly clamp or release the box body and the box lid, thereby achieving quick clamping or release of the box body and the box lid. The operation is convenient, time-saving, and labor-saving. At the same time, the tension of the tensioning component can be adjusted by the adjusting component, thereby adjusting the tensioning force of the tensioning component, thereby adjusting the clamping force of the clamping mechanism on the box body and the box lid, ensuring reliable clamping.

[0018] (2) The present invention also adjusts the clamping force of the clamping mechanism by setting an adjustment component. The adjustment component includes a positioning nut, a tensioning shaft, a fastening nut, and a set screw. The positioning nut, tensioning shaft, and fastening nut are sequentially sleeved on the threaded end of the pull rod. The positioning nut and fastening nut are evenly threaded to the threaded end. By turning the positioning nut, its position on the pull rod can be adjusted, thereby limiting the position of the tensioning shaft on the pull rod and facilitating quick clamping of the tensioning shaft and the clamping component. By turning the fastening nut, its position on the pull rod can be adjusted, thereby adjusting the effective tensioning length of the pull rod, i.e., the tensioning amount, and thus adjusting the clamping force between the box body and the box cover. At the same time, the fastening nut can also lock the tensioning shaft, so that the tensioning amount of the pull rod remains unchanged, thereby ensuring that the clamping force between the box body and the box cover remains unchanged and achieving reliable clamping.

[0019] (3) The present invention also provides near-locking protection for the locking mechanism by setting a safety pin. The safety pin is inserted into the second pin hole and the first pin hole in sequence to prevent the rocker arm from rotating relative to the second base when it is in the locked position. This ensures that the rocker arm is always in the locked position and further ensures that the clamping mechanism is always in the locked state, thereby achieving the locking protection of the clamping mechanism and preventing the rocker arm from being accidentally loosened during the handling of the packaging box, which would cause the clamping mechanism to lose its clamping force.

[0020] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages may become apparent from the description or be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained from what is particularly pointed out in the description and drawings. Attached Figure Description

[0021] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0022] Figure 1 This is a schematic diagram of the clamping mechanism in Embodiment 1 of the present invention. Figure 1 ;

[0023] Figure 2 for Figure 1 Enlarged view of section A in the middle;

[0024] Figure 3 This is a schematic diagram of the clamping mechanism in Embodiment 1 of the present invention. Figure 2 ;

[0025] Figure 4 This is a schematic diagram of the tensioning assembly and the adjusting assembly according to Embodiment 1 of the present invention;

[0026] Figure 5 This is a schematic diagram of the tie rod structure of Embodiment 1 of the present invention;

[0027] Figure 6 This is an exploded view of the assembly of the tensioning shaft and the set screw in Embodiment 1 of the present invention;

[0028] Figure 7 for Figure 6 Sectional view along the BB line of the tensioning shaft;

[0029] Figure 8 This is a schematic diagram of the clamping assembly according to Embodiment 1 of the present invention;

[0030] Figure 9 This is a schematic diagram of the rocker arm in Embodiment 1 of the present invention. Figure 1 ;

[0031] Figure 10 This is a schematic diagram of the rocker arm in Embodiment 1 of the present invention. Figure 2 ;

[0032] Figure 11 This is a schematic diagram of the structure of the second base in Embodiment 1 of the present invention. Figure 1 ;

[0033] Figure 12 This is a schematic diagram of the structure of the second base in Embodiment 1 of the present invention. Figure 2 .

[0034] Figure label:

[0035] 1-Packaging box; 11-Box body; 12-Box lid; 2-Clamping mechanism; 21-Tensioning assembly; 211-First base; 212-Pull rod; 2121-Threaded end; 21211-Keyway; 2122-Connecting end; 22-Adjusting assembly; 221-Positioning nut; 222-Tensioning shaft; 2221-Through hole; 2222-Threaded hole; 223-Fastening nut; 224-Set screw; 23-Clamping assembly; 231-Rock arm; 2311-Handle; 2312-Cam; 23121-First shaft hole; 23122-First pin hole; 23123-Semicircular groove; 232-Second base; 2321-Mounting plate; 23211-Groove; 2322-Mounting lug; 23221-Second shaft hole; 23222-Second pin hole; 233-Rotating shaft; 234-Safety pin. Detailed Implementation

[0036] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0037] Example 1

[0038] In one specific embodiment of the present invention, a clamping mechanism between the box body and the box lid is disclosed, such as... Figure 1 , Figure 2 and Figure 3As shown, it can be used to quickly clamp or detach two objects. This embodiment takes the clamping mechanism 2 for quick clamping of a packaging box 1 as an example for specific explanation. The packaging box 1 includes a box body 11 and a box lid 12, which are separate when not in use. The clamping mechanism 2 includes a tensioning component 21, an adjusting component 22, and a pressing component 23. The adjusting component 22 is sleeved on the tensioning component 21 and is movably connected to the pressing component 23, thereby allowing the tensioning component 21 and the pressing component 23 to be connected. 3. Connection: The clamping component 23 is fixedly connected to the lid 12, and the tensioning component 21 is fixedly connected to the body 11. By moving the clamping component 23, the tensioning component 21 can be tightened or loosened, thereby realizing the quick clamping or loosening of the body 11 and the lid 12. The operation is convenient, time-saving and labor-saving. At the same time, the tension of the tensioning component 21 can be adjusted by adjusting the component 22, thereby adjusting the tensioning force of the tensioning component 21, thereby realizing the adjustment of the clamping force of the clamping mechanism 2 on the body 11 and the lid 12, ensuring reliable clamping.

[0039] Preferably, such as Figure 4 and Figure 5 As shown, the tensioning assembly 21 includes a first base 211 and a pull rod 212. The first base 211 is fixedly mounted on the housing 11. One end of the pull rod 212 is hinged to the first base 211 to form a connecting end 2122. The pull rod 212 is rotatable about the hinge point between the connecting end 2122 and the first base 211. The other end of the pull rod 212 is threaded to form a threaded end 2121. A keyway 21211 is provided on the cylindrical surface of the threaded end 2121. The keyway 21211 is preferably oblong and is used to restrict the adjustment assembly 22 from rotating along the axis of the pull rod 212.

[0040] Preferably, the adjusting assembly 22 consists of a positioning nut 221, a tensioning shaft 222, a fastening nut 223, and a set screw 224. The positioning nut 221, tensioning shaft 222, and fastening nut 223 are sequentially sleeved on the threaded end 2121 of the pull rod 212. The positioning nut 221 and fastening nut 223 are evenly threaded to the threaded end 2121. By turning the positioning nut 221, its position on the pull rod 212 can be adjusted, thereby limiting the position of the tensioning shaft 222 on the pull rod 212, facilitating quick mounting of the tensioning shaft 222 and the clamping assembly 23. By turning the fastening nut 223, its position on the pull rod 212 can be adjusted, thereby adjusting the effective tensioning length of the pull rod 212, i.e., the tension amount, and thus adjusting the clamping force between the housing 11 and the cover 12. At the same time, the fastening nut 223 can also lock the tensioning shaft 222, thereby... The tension of the pull rod 212 remains constant, thus ensuring that the clamping force between the box body 11 and the box cover 12 remains constant, achieving reliable clamping. In existing locking mechanisms, the tension shaft 222 can slide freely on the pull rod 212 when not in use. When in use, the tension shaft 222 needs to be adjusted to the tension position of the pull rod 212 before it can be installed and used. However, in this application, the position of the tension shaft 222 on the pull rod 212 is adjusted by setting positioning nuts 221 and fastening nuts 223 on both sides of the tension shaft 222, fixing the tension shaft 222 at the effective tension length of the pull rod 212. Therefore, after the tension shaft 222 is adjusted to the position on the pull rod 212 for the first time, it is fixed in that position. Each time it is installed and used afterward, there is no need to readjust the position of the tension shaft 222 on the pull rod 212, and it can be installed and used directly, which improves the installation efficiency and makes it more convenient to use.

[0041] Preferably, such as Figure 6 As shown, the tensioning shaft 222 is a cylinder; the tensioning shaft 222 is provided with a through hole 2221 and a threaded hole 2222. The through hole 2221 is provided on the cylindrical surface of the tensioning shaft 222 and passes through the tensioning shaft 222. The pull rod 212 can pass through the through hole 2221, so that the tensioning shaft 222 can move on the pull rod 212; the threaded hole 2222 is provided on the end face of the tensioning shaft 222 and passes through the through hole 2221 along the axis of the tensioning shaft 222.

[0042] Preferably, such as Figure 7As shown, the set screw 224 can be inserted into the threaded hole 2222 and threadedly connected to the threaded hole 2222. By tightening one end of the set screw 224, the other end can be inserted into the keyway 21211 of the threaded end 2121 of the pull rod 212 and pressed against the bottom wall of the keyway 21211. This is used to limit the tension shaft 222, thereby restricting the rotation of the tension shaft 222 along the axis of the pull rod 212. At the same time, it can also fix the tension shaft 222 on the pull rod 212, so that the position of the tension shaft 222 on the pull rod 212 remains unchanged, thereby further ensuring that the tension of the pull rod 212 remains unchanged. In the existing locking mechanism, the tension shaft 222 can rotate freely on the pull rod 212 when not in use, and the tension shaft 222 needs to be adjusted first when in use. Then, it is used for clamping. In this application, the end face of the tensioning shaft 222 is provided with a threaded hole 2222, which extends through the axis of the tensioning shaft 222 to the through hole 2221. The set screw 224 is screwed into the threaded through hole 2222 and inserted into the keyway 21211, so that it is pressed against the bottom wall of the keyway 21211, restricting the tensioning shaft 222 from rotating freely along the axis of the pull rod 212. This ensures that the axis of the tensioning shaft 222 is always parallel to the axis of the semi-circular groove 23123 in the two cams 2312. Therefore, restricting the rotation of the tensioning shaft 222 along the axis of the pull rod 212 allows the clamping mechanism 2 to be used directly without adjusting the tensioning shaft 222 each time, improving clamping efficiency and making it more convenient to use.

[0043] Preferably, the tensioning shaft 222 is clamped to the clamping assembly 23, thereby connecting the clamping assembly 23 to the tensioning assembly 21. This allows the rotation of the clamping assembly 23 to move the pull rod 212 in the tensioning assembly 21, causing the box body 11 and the box cover 12 to clamp or quickly separate.

[0044] Preferably, such as Figure 8As shown, the clamping assembly 23 includes a rocker arm 231, a second base 232, a rotating shaft 233, and a safety pin 234. The safety pin 234 is used to lock the rocker arm 231, ensuring that the rocker arm 231 will not rotate relative to the second base 232 when it is in the locked position, so that the rocker arm 231 is always in the locked position, thereby realizing the locking protection of the clamping mechanism 2 and preventing the rocker arm 231 from accidentally coming loose during the handling of the packaging box 1, which would cause the clamping mechanism 2 to lose its clamping force and ensure its reliable clamping. The rocker arm 231 is hinged to the second base 232 through the rotating shaft 233. The base 232 is fixedly installed on the edge of the cover 12 and is correspondingly set with the first base 211. By rotating the rocker arm 231, the rocker arm 231 is engaged in the second base 232. At this time, the rocker arm 231 is in the locked position, and the clamping component 23 is in the locked state, so that the clamping mechanism 2 clamps, thereby clamping the box body 11 and the cover 12. By rotating the rocker arm 231 in the opposite direction, the rocker arm 231 is rotated out from the second base 232. At this time, the rocker arm 231 is in the released position, the clamping component 23 is disengaged from the adjusting component 22, so that the clamping mechanism 2 can be quickly unlocked, thereby separating the box body 11 and the cover 12.

[0045] Preferably, such as Figure 9 and Figure 10 As shown, the rocker arm 231 includes a handle 2311 and two cams 2312 disposed on both sides of the end of the handle 2311, the two cams 2312 being symmetrically arranged; the cams 2312 are provided with a first shaft hole 23121, a first pin hole 23122, and a semi-circular groove 23123. The first shaft hole 23121 can be used to insert a rotating shaft 233, the first pin hole 23122 can be used to insert a safety pin 234, and the semi-circular groove 23123 is used to mount the tensioning shaft 222 in the adjusting assembly 22, thereby realizing the connection between the clamping assembly 23 and the tensioning assembly 21, and at the same time preventing the tensioning shaft 222 from moving freely in the semi-circular groove 23123, thereby affecting the clamping force of the clamping mechanism 2. The tensioning shaft 222 can be engaged or disengaged from the semicircular groove 23123, thereby enabling the tensioning assembly 21 and the pressing assembly 23 to quickly connect or separate, realizing the clamping mechanism 2 to quickly clamp or release the box body 11 and the box cover 12. Compared with the existing locking mechanism, when the rocker arm needs to be moved to the loosened position of the locking mechanism, the pull rod needs to be manually disengaged from the lock again in order to separate the box body 11 and the box cover 12. However, in this application, the tensioning shaft 222 can be disengaged from the semicircular groove 23123 in the rocker arm 213 simply by moving the rocker arm 231 to the loosened position, thereby enabling the tensioning assembly 21 and the pressing assembly 23 to quickly separate, realizing the quick separation of the box body 11 and the box cover 12, making the operation more convenient and faster.

[0046] Preferably, such as Figure 11 and Figure 12As shown, the second base 232 is U-shaped; the second base 232 includes a mounting plate 2321 and mounting lugs 2322 symmetrically arranged on both sides of the mounting plate 2321. The mounting plate 2321 is fixedly connected to the cover 12. The mounting plate 2321 is provided with a groove 23211. When the clamping mechanism 2 is in the clamping state, the pull rod 212 can be fully inserted into the groove 23211 to quickly determine whether the rocker arm 231 is in the locked position. The mounting lugs 2322 are provided with a second shaft hole 23221 and a second pin hole 23222. The second shaft hole 23221 can be used to insert the rotating shaft 233, and the second pin hole 23222 can be used to insert the safety pin 234.

[0047] Preferably, the rotating shaft 233 passes sequentially through the second shaft hole 23221 and the first shaft hole 23121, hinged to the rocker arm 231 and the second base 232, and with the rotating shaft 233 as the fulcrum, the rocker arm 231 and the second base 232 form a cam lever mechanism; by moving the crank 2311, the cam 2312 rotates with the rotating shaft 233 as the fulcrum, engaging the cam 2312 in the U-shaped groove of the second base 232. At this time, the rocker arm 231 is in the locked position. Under the tension of the pull rod 212, the cam 2312 is locked in the U-shaped groove of the second base 232, thereby securing the clamping assembly. When 23 is in the locked state, the clamping mechanism 2 is locked, thereby quickly clamping the box body 11 and the box cover 12. By reversing the rocker arm 2311, the cam 2312 rotates in the opposite direction with the pivot 233 as the fulcrum, and the cam 2312 rotates out of the U-shaped groove of the second base 232. Continue to move the rocker arm 2311 to the adjusting component 22, and the tensioning shaft 222 disengages from the semi-circular groove 23123 on the cam 2312. At this time, the rocker arm 231 is in the released position, thereby separating the tensioning component 21 from the pressing component 23, realizing the quick unlocking of the clamping mechanism 2, and thus quickly separating the box body 11 and the box cover 12.

[0048] Preferably, the safety pin 234 is inserted sequentially into the second pin hole 23222 and the first pin hole 23122 to prevent the rocker arm 231 from rotating relative to the second base 232 when it is in the locked position. This ensures that the rocker arm 231 is always in the locked position, and further ensures that the clamping mechanism 2 is always in the locked state. This achieves the locking protection of the clamping mechanism 2 and prevents the rocker arm 231 from being accidentally released during the handling of the packaging box 1, which would cause the clamping mechanism 2 to lose its clamping force.

[0049] Preferably, a retaining ring is installed on the end of the safety pin 234 that passes through the second pin hole 23222 and the first pin hole 23122 to prevent the safety pin 234 from coming out of the second pin hole 23222 and the first pin hole 23122; a retaining ring is installed on the end of the rotating shaft 233 that passes through the second shaft hole 23221 and the first shaft hole 23121 to prevent the rotating shaft 233 from coming out of the second shaft hole 23221 and the first shaft hole 23121.

[0050] Example 2

[0051] In another specific embodiment of the present invention, a clamping method for a box body and a box cover using the clamping mechanism of Embodiment 1 is disclosed, comprising the following steps:

[0052] Step S1: Install the clamping mechanism 2 onto the packaging box 1;

[0053] Step S2: Clamping mechanism 2 clamps the box body 11 and the box cover 12;

[0054] The adjusting component 22 is fitted onto the tensioning component 21, and its position on the pull rod 212 is adjusted according to the thickness of the lid 12. The effective tensioning length of the pull rod 212 is adjusted, i.e., the tension amount of the pull rod 212. The adjusted pull rod 212 is connected to the clamping component 23 through the adjusting component 22. The clamping component 23 is moved to lock it, thereby quickly clamping the box body 11 and the lid 12. Then, the safety pin 234 is inserted into the corresponding pin hole to lock and protect the clamping mechanism 2, ensuring that the clamping mechanism 2 reliably clamps the box body 11 and the lid 12. The specific steps include:

[0055] Step S201: Adjust the tension of the pull rod 212;

[0056] Based on the measured thickness of the cover 12, tighten the fastening nut 223 and adjust its position on the pull rod 212 to limit the tension of the pull rod 212; press the tensioning shaft 222 against the end face of the fastening nut 223, and then tighten the set screw 224, inserting the other end of the set screw 224 into the keyway 21211 of the threaded end 2121 of the pull rod 212, and press it against the bottom wall of the keyway 21211 to position the tensioning shaft 222 and restrict the rotation of the tensioning shaft 222 along the axis of the pull rod 212; tighten the positioning nut 221 to make it contact the tensioning shaft 222 to restrict the sliding of the tensioning shaft 222 on the pull rod 212, so as to facilitate the quick mounting of the tensioning shaft 222 into the semi-circular groove 23123 on the rocker arm 231 in the clamping assembly 23;

[0057] Step S202: Move the rocker arm 231 to lock the clamping mechanism 2;

[0058] Move the rocker arm 231 to the released position, and then install the tensioning shaft 222 into the semi-circular groove 23123 of the rocker arm 231; move the rocker arm 231 to engage the cam 2312 in the U-shaped groove of the second base 232, and drive the pull rod 212 to move through the tensioning shaft 222. Under the tensioning force of the pull rod 212, the box body 11 and the box cover 12 are quickly clamped together, and the clamping mechanism 2 can be locked at the same time. At this time, the rocker arm 231 is in the locked position.

[0059] Step S203: Locking protection;

[0060] When the rocker arm 231 is in the locked position, the safety pin 234 is inserted into the second pin hole 23222 and the first pin hole 23122 in sequence to prevent the rocker arm 231 from rotating relative to the second base 232. This ensures that the rocker arm 231 is always in the locked position, thereby achieving the locking protection of the clamping mechanism 2 and preventing the rocker arm 231 from being accidentally loosened during the handling of the packaging box 1, which would cause the clamping mechanism 2 to lose its clamping force.

[0061] Step S3: Release the clamping between the box body 11 and the box cover 12, so that the box body 11 and the box cover 12 are loosened and separated;

[0062] Pull the safety pin 234 out of the second pin hole 23222 and the first pin hole 23122 to release the locking protection of the clamping mechanism 2; move the rocker arm 2311 in the opposite direction to rotate the cam 2312 out of the U-shaped groove of the second base 232, so that the rocker arm 231 is in the loose position. At this time, the tensioning shaft 222 in the adjusting assembly 22 disengages from the semi-circular groove 23123 on the cam 2312, thereby separating the pull rod 212 from the clamping assembly 23, realizing the quick release of the clamping mechanism 2, and thus the box body 11 and the box cover 12 are quickly separated.

[0063] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A clamping mechanism for a box body and a box lid, characterized in that, The device includes a tensioning assembly (21), an adjusting assembly (22), and a clamping assembly (23). The tensioning assembly (21) includes a first base (211) and a pull rod (212), which is hinged to the first base (211). The adjusting assembly (22) includes a tensioning shaft (222). The clamping assembly (23) includes a rocker arm (231), a second base (232), and a safety pin (234), which is hinged to the second base (232). The rocker arm (231) includes a cam (2312), which has a semi-circular groove (23123). The second base (232) includes a mounting lug (2322). The tensioning shaft (222) of the adjusting component (22) is sleeved on the pull rod (212) of the tensioning component (21) and engages with the semi-circular groove (23123) of the pressing component (23), thereby connecting the tensioning component (21) and the pressing component (23); the pressing component (23) is fixedly connected to the lid (12) of the packaging box (1), and the tensioning component (21) is fixedly connected to the box body (11) of the packaging box (1). The tensioning component is adjusted by moving the pressing component (23). (21) Tighten or disengage from the clamping assembly (23) for quickly clamping or loosening the box body (11) and the box cover (12); the cam (2312) is provided with a first pin hole (23122); the mounting lug (2322) is provided with a second pin hole (23222); the safety pin (234) can be inserted into the second pin hole (23222) and the first pin hole (23122) in sequence, which can prevent the rocker arm (231) from rotating relative to the second base (232).

2. The clamping mechanism between the box body and the box lid according to claim 1, characterized in that, The pull rod (212) has a threaded end (2121) and a connecting end (2122).

3. The clamping mechanism between the box body and the box lid according to claim 2, characterized in that, The threaded end (2121) is provided with a keyway (21211).

4. The clamping mechanism between the box body and the box lid according to claim 3, characterized in that, The keyway (21211) is oblong.

5. A method for clamping a box body and a box lid, characterized in that, The clamping mechanism described in any one of claims 1 to 4 is used to clamp the box body and the box cover.

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