Buckling device for barrel body, barrel cover and barrel bottom

Abstract

The invention belongs to the technical field of outer packaging, and discloses a barrel body, barrel cover and barrel bottom buckling device which comprises a barrel body main body, a barrel bottom main body is arranged on the outer wall of the bottom end of the barrel body main body through a second connecting mechanism, and a buffering mechanism is arranged on the outer wall of the bottom end of the barrel bottom main body. A barrel cover main body is arranged on the outer wall of the top end of the barrel main body through a first connecting mechanism; the first connecting mechanism comprises a connecting block, a rotating wheel A and a rotating wheel B are rotationally connected to the inner wall of the connecting block, and traction ropes are wound around the outer walls of the rotating wheel A and the rotating wheel B. Through cooperation of structures such as the connecting block and the mounting block A, when the barrel cover main body is mounted, the barrel cover main body can be fixed by clamping the check block and the through groove, and when the barrel cover main body is dismounted, the barrel cover main body and the connecting block can be conveniently and quickly taken down from the barrel main body at the same time by pulling the partition plate, so that the barrel cover is convenient to dismount. And therefore, the barrel cover main body can be disassembled and assembled conveniently.

Description

Technical Field

[0001] The invention belongs to the technical field of outer packaging, and in particular is a buckling device for a barrel body, a barrel cover and a barrel bottom. Background Art

[0002] In the field of packaging technology, the structural design of containers is of vital importance. The design of the fastening devices of the barrel body, barrel cover and barrel bottom directly affects the sealing, durability and ease of use of the barrel. The research and development and innovation of this fastening device is aimed at meeting the needs of different industries for packaging containers. For example, the chemical, food, pharmaceutical and other industries require reliable packaging to ensure the safety of products during storage and transportation.

[0003] In the production process of existing barrels, the barrel body, barrel cover and barrel bottom are separate types, and they need to be snapped together and assembled to form the whole barrel after production. In some existing technologies, when the barrel cover and the barrel bottom are installed on the barrel body, they are generally fixed by bolts, or connected by welding or the like. This process is relatively troublesome, and it is also relatively troublesome when the barrel cover and the barrel bottom need to be separated later, which affects the efficiency of installation or disassembly of the barrel body, barrel cover and barrel bottom. Therefore, in view of the above problem, a snap-fitting device for the barrel body, barrel cover and barrel bottom is proposed. Summary of the invention

[0004] In order to solve the problems raised in the above background technology, the present invention provides a buckling device for a barrel body, a barrel cover and a barrel bottom, which solves the problem of the prior art that the barrel cover and the barrel bottom are relatively troublesome to install.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a buckling device for a barrel body, a barrel cover and a barrel bottom, comprising a barrel body main body, a barrel bottom main body is arranged on the outer wall of the bottom end of the barrel body main body through a second connecting mechanism, a buffer mechanism is arranged on the outer wall of the bottom end of the barrel bottom main body, and a barrel cover main body is arranged on the outer wall of the top end of the barrel body main body through a first connecting mechanism;

[0006] The first connecting mechanism includes a connecting block, the inner wall of the connecting block is rotatably connected with a rotating wheel A and a rotating wheel B, the outer walls of the rotating wheel A and the rotating wheel B are both wrapped with a traction rope, the top outer wall of the connecting block is fixedly connected with a handle, the outer wall of the handle is slidably connected with a partition, the inner wall of the connecting block is slidably connected with a slider, the outer wall of the slider is hinged with a connecting rod, the inner wall of the connecting block is elastically connected with a stopper through a connecting spring, the bottom outer wall of the stopper is fixedly connected with a T-block, the inner wall of the connecting block is provided with a T-slot, and the outer wall of the barrel body is fixedly connected with a mounting block A.

[0007] Preferably, a through groove is formed on the outer wall of the mounting block A, the connecting block is fixedly connected to the top outer wall of the barrel cover body, and the connecting rod is hinged to the outer wall of the stopper.

[0008] Preferably, one end of the traction rope is fixedly connected to the bottom outer wall of the partition, the other end of the traction rope is fixedly connected to the top outer wall of the slider, and the T-block is slidably connected to the inner wall of the T-slot.

[0009] Preferably, one end of the connecting spring is fixedly connected to the outer wall of the stopper, the other end of the connecting spring is fixedly connected to the inner wall of the connecting block, the stopper is slidably connected to the inner wall of the connecting block, and the stopper is engaged with the through slot.

[0010] Preferably, the second connecting mechanism comprises a mounting block B, an outer wall of the mounting block B is provided with a slot, the outer wall of the barrel body is fixedly connected with a fixing block, and the inner wall of the fixing block is elastically connected with an insert block via a return spring.

[0011] Preferably, the mounting block B is fixedly connected to the outer wall of the barrel bottom body, one end of the return spring is fixedly connected to the outer wall of the insert block, and the other end of the return spring is fixedly connected to the inner wall of the fixing block.

[0012] Preferably, the outer wall of the inserting block is slidably connected to the inner wall of the fixing block, and the inserting block is snap-fitted to the slot.

[0013] Preferably, the buffer mechanism includes a base, the inner wall of the bottom end of the base is elastically connected to a moving block through a buffer spring, the inner wall of the base is provided with a groove, the inner wall of the base is slidably connected to a ring, and the outer wall of the bottom end of the ring is fixedly connected to a rubber pad.

[0014] Preferably, the circular ring and the moving block are both fixedly connected to the outer wall of the bottom end of the barrel bottom body, and the rubber pad is in contact with the inner wall of the groove.

[0015] Preferably, one end of the buffer spring is fixedly connected to the inner wall of the bottom end of the base, the other end of the buffer spring is fixedly connected to the outer wall of the bottom end of the moving block, and the moving block is slidably connected to the inner wall of the base.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention provides the cooperation of the connection block and the installation block A and other structures. When installing the barrel cover body, the connection block can be inserted into the installation block A, and the barrel cover body can be fixed by the engagement of the stopper with the through groove. When disassembling, the partition is pulled so that the traction rope drives the slider to move upward, and the stopper is moved and disengaged from the through groove by the connecting rod, so that the barrel cover body and the connection block can be conveniently and quickly removed from the barrel body at the same time, thereby facilitating the process of disassembling and installing the barrel cover body.

[0018] The present invention provides a fixing block and an installation block B and other structures. When installing the barrel bottom body, the insert block can be pulled outward to make the barrel bottom body contact with the barrel body. The barrel bottom body can be fixed by engaging the insert block with the card slot. When removing the barrel bottom body, the insert block can also be pulled to make the insert block disengage from the card slot, so that the barrel bottom body can be released from fixation, thereby facilitating the process of fixing or removing the barrel bottom body from the barrel body by the operator.

[0019] The present invention cooperates with structures such as a buffer spring and a circular ring. When the barrel contacts the ground and is collided, the moving block squeezes the buffer spring, and the buffer spring can provide a buffering effect. The circular ring drives the rubber pad to move along the inner wall of the base. The rubber pad contacts the inner wall of the groove to increase friction, thereby reducing the amplitude of vibration and further improving the buffering effect, so as to prevent the items in the barrel from being damaged by excessive impact force. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the structure after the connection block section, the barrel cover main body and the barrel body are exploded according to the present invention;

[0022] Figure 3 For the present invention Figure 2 The enlarged structural diagram of part A in the middle;

[0023] Figure 4 It is a schematic diagram of the cross section of the connecting block, T-block and T-slot structure of the present invention;

[0024] Figure 5 It is a schematic diagram of the second connecting mechanism and the base structure of the present invention;

[0025] Figure 6 For the present invention Figure 5 The enlarged structural diagram of part B in the middle;

[0026] Figure 7 It is a schematic diagram of the base cross section and buffer mechanism structure of the present invention.

[0027] In the figure: 1. barrel body; 2. barrel cover body; 3. first connecting mechanism; 301. connecting block; 302. rotating wheel A; 303. rotating wheel B; 304. traction rope; 305. partition; 306. handle; 307. slider; 308. connecting rod; 309. connecting spring; 310. stopper; 311. T-block; 312. T-slot; 313. mounting block A; 314. through slot; 4. barrel bottom body; 5. second connecting mechanism; 501. mounting block B; 502. slot; 503. fixing block; 504. reset spring; 505. insert block; 6. buffer mechanism; 601. moving block; 602. ring; 603. rubber pad; 604. groove; 605. buffer spring; 606. base. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] like Figures 1 to 7 As shown, the present invention provides a buckling device for a barrel body, a barrel cover and a barrel bottom, comprising a barrel body main body 1, a barrel bottom main body 4 is arranged on the outer wall of the bottom end of the barrel body main body 1 through a second connecting mechanism 5, a buffer mechanism 6 is arranged on the outer wall of the bottom end of the barrel bottom main body 4, and a barrel cover main body 2 is arranged on the outer wall of the top end of the barrel body main body 1 through a first connecting mechanism 3; the first connecting mechanism 3 comprises a connecting block 301, a rotating wheel A302 and a rotating wheel B303 are rotatably connected to the inner wall of the connecting block 301, and a traction rope is wound around the outer walls of the rotating wheels A302 and B303 304, the top outer wall of the connecting block 301 is fixedly connected with a handle 306, the outer wall of the handle 306 is slidably connected with a partition 305, the inner wall of the connecting block 301 is slidably connected with a slider 307, the outer wall of the slider 307 is hinged with a connecting rod 308, the inner wall of the connecting block 301 is elastically connected with a stopper 310 through a connecting spring 309, the bottom outer wall of the stopper 310 is fixedly connected with a T-block 311, the inner wall of the connecting block 301 is provided with a T-slot 312, and the outer wall of the barrel body 1 is fixedly connected with a mounting block A313.

[0030] The barrel body 1, the barrel bottom body 4 and the barrel cover body 2 are all prior art. Through the first connecting mechanism 3 and the second connecting mechanism 5, the barrel bottom body 4 and the barrel cover body 2 can be installed on the barrel body 1 to complete the buckling, and it is relatively convenient and quick, and there is no need to use bolts or welding to fix them; the buffer mechanism 6 can provide a better buffering effect for the barrel when the barrel is in use, so as to prevent the barrel bottom from contacting and colliding with the ground, and the impact force is too large to cause damage; the traction rope 304, the rotating wheel A302, the rotating wheel B303, the slider 307, the connecting rod 308, the connecting spring 309, the stopper 310, the T-block 311, and the T-slot 312 are all provided with two groups, which are symmetrically distributed on the inner walls on both sides of the connecting block 301. When the partition 305 is pulled, one end of the traction rope 304 on both sides can be driven to move upward, and the traction rope 304 moves along the outer walls of the rotating wheel A302 and the rotating wheel B303, so that the two rotate, and the traction rope 304 can drive the sliders 307 on both sides to move upward synchronously.

[0031] like Figures 2 to 4 As shown, a through slot 314 is provided on the outer wall of the mounting block A313, the connecting block 301 is fixedly connected to the top outer wall of the barrel cover body 2, and the connecting rod 308 is hinged to the outer wall of the stopper 310; one end of the traction rope 304 is fixedly connected to the bottom outer wall of the partition 305, and the other end of the traction rope 304 is fixedly connected to the top outer wall of the slider 307, and the T-block 311 is slidably connected to the inner wall of the T-slot 312; one end of the connecting spring 309 is fixedly connected to the outer wall of the stopper 310, and the other end of the connecting spring 309 is fixedly connected to the inner wall of the connecting block 301, the stopper 310 is slidably connected to the inner wall of the connecting block 301, and the stopper 310 is clamped with the through slot 314.

[0032] There are two groups of mounting blocks A313, which are symmetrically distributed on the outer walls of both sides of the barrel body 1. The two ends of the connecting block 301 can be inserted into the inner wall of the mounting block A313, and the stopper 310 is engaged with the through groove 314 to fix the connecting block 301, thereby fixing the barrel cover body 2 and the barrel body 1; the stopper 310 keeps the straight surface facing upward, and when it is engaged with the through groove 314, the straight surface contacts the inner wall of the through groove 314, so that the connecting block 301 can no longer move upward; when the connecting block 301 is inserted into the mounting block A313 from below, the arc surface of the stopper 310 first contacts the outer wall of the mounting block A313, and is squeezed by the outer wall and moves to the inner wall of the connecting block 301, and the connecting spring 309 is contracted under force, so that the connecting block 301 can be inserted into the inner wall of the mounting block A313;

[0033] When the position of the stopper 310 corresponds to the through slot 314, the connecting spring 309 drives the stopper 310 to pop outward due to its own elastic force, and can be engaged with the through slot 314 to fix the barrel cover body 2; when the traction rope 304 pulls the slider 307 to move upward, the connecting rod 308 flips, and its bottom end drives the stopper 310 to move. Since the T-block 311 is always in contact with the inner wall of the T-slot 312, the stopper 310 can only move horizontally. Under the flipping action of the connecting rod 308, it moves to the inner wall of the connecting block 301 and breaks contact with the through slot 314, so that the limit of the connecting block 301 can be released, so that the connecting block 301 and the barrel cover body 2 can be removed at the same time conveniently and quickly.

[0034] like Figure 5 and Figure 6 As shown, the second connecting mechanism 5 includes a mounting block B501, the outer wall of which is provided with a slot 502, the outer wall of the barrel body 1 is fixedly connected with a fixing block 503, and the inner wall of the fixing block 503 is elastically connected with an insert block 505 via a return spring 504; the mounting block B501 is fixedly connected to the outer wall of the barrel bottom body 4, one end of the return spring 504 is fixedly connected to the outer wall of the insert block 505, and the other end of the return spring 504 is fixedly connected to the inner wall of the fixing block 503; the outer wall of the insert block 505 is slidably connected to the inner wall of the fixing block 503, and the insert block 505 is snap-fitted into the slot 502.

[0035] There are two groups of mounting blocks B501 and fixing blocks 503, which are symmetrically distributed on the outer walls of the barrel body 1 and the barrel bottom 4. The lower part of the insert block 505 can be engaged with the card slot 502 to fix the barrel body 1 and the barrel bottom 4, so that the barrel bottom 4 cannot be separated from the barrel body 1; the operator can pull the insert block 505 to drive the reset spring 504 to be stretched, so as to install or disassemble the barrel bottom 4, which is more convenient. Therefore, when installing the barrel cover body 2 and the barrel bottom 4, there is no need to fix them by bolts or welding, so that it is easy to disassemble and install them, saving time and effort.

[0036] like Figure 7 As shown, the buffer mechanism 6 includes a base 606, the inner wall of the bottom end of the base 606 is elastically connected to the moving block 601 through a buffer spring 605, the inner wall of the base 606 is provided with a groove 604, the inner wall of the base 606 is slidably connected to a ring 602, and the outer wall of the bottom end of the ring 602 is fixedly connected to a rubber pad 603; the ring 602 and the moving block 601 are both fixedly connected to the outer wall of the bottom end of the barrel bottom body 4, and the rubber pad 603 is in contact with the inner wall of the groove 604; one end of the buffer spring 605 is fixedly connected to the inner wall of the bottom end of the base 606, and the other end of the buffer spring 605 is fixedly connected to the outer wall of the bottom end of the moving block 601, and the moving block 601 is slidably connected to the inner wall of the base 606.

[0037] The buffer mechanism 6 can provide a buffering effect on the barrel as a whole. When the bottom of the barrel collides with the ground, the impact force can be reduced to prevent the items inside the barrel from being damaged. When the collision produces an impact, the moving block 601 moves along the inner wall of the base 606, compresses the buffer spring 605 and then rebounds, reducing the impact of vibration. When the moving block 601 moves, the ring 602 moves synchronously along the inner wall of the base 606, and the rubber pad 603 continuously moves along the inner wall of the groove 604. The groove 604 has multiple groups of grooves vertically opened. When the rubber pad 603 moves, it is squeezed by the inner wall of the groove 604 to produce a certain deformation, thereby increasing the friction between the two, thereby reducing the amplitude of the movement of the ring 602 and the moving block 601, further achieving a buffering effect.

[0038] The working principle and use process of the present invention:

[0039] When installing the barrel cover body 2, the two ends of the connecting block 301 can be inserted into the inner walls of the mounting blocks A313 on both sides. During the insertion process of the connecting block 301 below, the arc surface of the stop block 310 first contacts the outer wall of the mounting block A313, and is squeezed by the outer wall and moves to the inner wall of the connecting block 301, and the connecting spring 309 is forced to shrink; when the position of the stop block 310 corresponds to the position of the through groove 314, the connecting spring 309 drives the stop block 310 to pop outward due to its own elastic force, and the stop block 310 is engaged with the through groove 314. The stop block 310 directly contacts the inner wall of the through groove 314, so that the connecting block 301 cannot move upward, and the connecting block 301 is fixed, so that the barrel cover body 2 and the barrel body 1 can be quickly fixed to complete the installation.

[0040] When removing the barrel cover body 2, the handle 306 can be held and the partition 305 can be pulled to drive one end of the traction ropes 304 on both sides to move upward, and the traction ropes 304 move along the outer walls of the rotating wheel A302 and the rotating wheel B303 to rotate the two and drive the sliders 307 on both sides to move upward synchronously; when the slider 307 moves upward, the connecting rod 308 flips over, and its bottom end drives the stopper 310 to move. Since the T-block 311 is always in contact with the inner wall of the T-slot 312, the stopper 310 can only move horizontally. Under the flipping action of the connecting rod 308, it moves to the inner wall of the connecting block 301 and breaks contact with the through slot 314, thereby releasing the limit of the connecting block 301, and the connecting block 301 and the barrel cover body 2 can be conveniently and quickly removed at the same time.

[0041] When installing the barrel bottom body 4, the operator can first pull the plug block 505 to drive the return spring 504 to be stretched, and then move the installation block B501 of the barrel bottom body 4 close to the fixed block 503 of the barrel body 1, so that the vertical positions of the two correspond, and the barrel body 1 and the barrel bottom body 4 are in contact. At this time, the lower part of the plug block 505 corresponds to the position of the card slot 502. When the plug block 505 is released, the elastic force of the return spring 504 drives the plug block 505 to rebound and reset, and the lower part of the plug block 505 corresponds to the card slot 502. By snapping together, the barrel body main body 1 and the barrel bottom main body 4 can be fixed, so that the barrel bottom main body 4 cannot be separated from the barrel body main body 1; when removing the barrel bottom main body 4, the plug block 505 can also be pulled to make the bottom of the plug block 505 disengage from the card slot 502, so that the limit of the barrel bottom main body 4 can be released and the barrel bottom main body 4 can be removed; thus, the barrel cover main body 2 and the barrel bottom main body 4 can be conveniently and quickly installed or disassembled through the first connecting mechanism 3 and the second connecting mechanism 5, without the need for fixing by bolts or welding, thus saving time and effort.

[0042] When the barrel is filled with items, the buffer mechanism 6 can play a buffering role when the bottom of the barrel collides with the ground, so as to reduce the damage to the items in the barrel caused by the collision impact; when the bottom of the barrel collides with the ground, the moving block 601 moves along the inner wall of the base 606, compresses the buffer spring 605 and then rebounds, and the elastic force of the buffer spring 605 can reduce the impact of vibration; when the moving block 601 moves, the ring 602 moves synchronously along the inner wall of the base 606, and the rubber pad 603 continuously moves along the inner wall of the groove 604, and is squeezed by the force of the inner wall of the groove 604 to produce a certain deformation, thereby increasing the friction between the two. The cooperation between the rubber pad 603 and the groove 604 can reduce the amplitude of the movement of the ring 602 and the moving block 601, thereby reducing the impact force on the barrel body, further playing a buffering effect, and protecting the items inside the barrel.

[0043] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A buckling device for a barrel body, a barrel cover and a barrel bottom, comprising a barrel body (1), characterized in that: The outer wall of the bottom end of the barrel body (1) is provided with a barrel bottom body (4) via a second connection mechanism (5), the outer wall of the bottom end of the barrel bottom body (4) is provided with a buffer mechanism (6), and the outer wall of the top end of the barrel body (1) is provided with a barrel cover body (2) via a first connection mechanism (3); The first connection mechanism (3) comprises a connection block (301), the inner wall of the connection block (301) is rotatably connected to a rotating wheel A (302) and a rotating wheel B (303), the outer walls of the rotating wheels A (302) and B (303) are both wound with a traction rope (304), the top outer wall of the connection block (301) is fixedly connected to a handle (306), the outer wall of the handle (306) is slidably connected to a partition (305), and the connection block (301) The inner wall of the connecting block (301) is slidably connected to a slider (307), the outer wall of the slider (307) is hinged with a connecting rod (308), the inner wall of the connecting block (301) is elastically connected to a stopper (310) via a connecting spring (309), the outer wall of the bottom end of the stopper (310) is fixedly connected to a T-shaped block (311), the inner wall of the connecting block (301) is provided with a T-shaped groove (312), and the outer wall of the barrel body (1) is fixedly connected to a mounting block A (313).

2. The buckling device for the barrel body, barrel cover and barrel bottom according to claim 1 is characterized in that: The outer wall of the mounting block A (313) is provided with a through slot (314), the connecting block (301) is fixedly connected to the outer wall of the top end of the barrel cover body (2), and the connecting rod (308) is hinged to the outer wall of the stopper (310).

3. The buckling device for the barrel body, barrel cover and barrel bottom according to claim 1 is characterized in that: One end of the traction rope (304) is fixedly connected to the bottom outer wall of the partition (305), and the other end of the traction rope (304) is fixedly connected to the top outer wall of the slider (307). The T-block (311) is slidably connected to the inner wall of the T-slot (312).

4. The buckling device for the barrel body, barrel cover and barrel bottom according to claim 1 is characterized in that: One end of the connecting spring (309) is fixedly connected to the outer wall of the stopper (310), and the other end of the connecting spring (309) is fixedly connected to the inner wall of the connecting block (301). The stopper (310) is slidably connected to the inner wall of the connecting block (301), and the stopper (310) is snap-fitted to the through groove (314).

5. The buckling device for the barrel body, barrel cover and barrel bottom according to claim 1 is characterized in that: The second connection mechanism (5) comprises a mounting block B (501), the outer wall of the mounting block B (501) is provided with a slot (502), the outer wall of the barrel body (1) is fixedly connected with a fixing block (503), and the inner wall of the fixing block (503) is elastically connected with an insert block (505) via a return spring (504).

6. The buckling device for the barrel body, barrel cover and barrel bottom according to claim 5, characterized in that: The mounting block B (501) is fixedly connected to the outer wall of the barrel bottom body (4), one end of the return spring (504) is fixedly connected to the outer wall of the insert block (505), and the other end of the return spring (504) is fixedly connected to the inner wall of the fixing block (503).

7. The buckling device for the barrel body, barrel cover and barrel bottom according to claim 5, characterized in that: The outer wall of the insert block (505) is slidably connected to the inner wall of the fixed block (503), and the insert block (505) is snap-fitted to the slot (502).

8. The buckling device for the barrel body, barrel cover and barrel bottom according to claim 1 is characterized in that: The buffer mechanism (6) comprises a base (606), the inner wall of the bottom end of the base (606) is elastically connected to a moving block (601) via a buffer spring (605), the inner wall of the base (606) is provided with a groove (604), the inner wall of the base (606) is slidably connected to a circular ring (602), and the outer wall of the bottom end of the circular ring (602) is fixedly connected to a rubber pad (603).

9. The buckling device for the barrel body, barrel cover and barrel bottom according to claim 8, characterized in that: The circular ring (602) and the moving block (601) are both fixedly connected to the outer wall of the bottom end of the barrel bottom body (4), and the rubber pad (603) is in contact with the inner wall of the groove (604).

10. The buckling device for the barrel body, barrel cover and barrel bottom according to claim 8, characterized in that: One end of the buffer spring (605) is fixedly connected to the inner wall of the bottom end of the base (606), and the other end of the buffer spring (605) is fixedly connected to the outer wall of the bottom end of the moving block (601), and the moving block (601) is slidably connected to the inner wall of the base (606).

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