Lunch box mold lifting mechanism

Abstract

The utility model provides a meal box mold lifting mechanism which comprises a frame body, a lifting mechanism and a lifting mechanism. The lifting device is mounted on the mounting plate; the lifting device comprises a driving device and a rebounding device; the pressing device penetrates through the mounting plate and is mounted on the side, away from the lifting device, of the mounting plate, and the lifting device is connected with the pressing device; wherein the driving device is mounted on the mounting plate and is connected with the pressing device; the rebounding device is mounted on the mounting plate and penetrates through the mounting plate to be connected with the pressing device; the driving device can drive the pressing device to move in the direction away from the mounting plate so as to press the meal box; the rebounding device can enable the pressing device to move in the direction close to the mounting plate. The utility model solves the technical problem that the production efficiency of the aluminum foil meal box is seriously influenced because the pressing of the meal box mould on the aluminum foil cannot be accurately controlled in the traditional aluminum foil tableware production process.

Description

Technical Field

[0001] The utility model relates to the technical field of lunch box production equipment, in particular to a lunch box mold lifting mechanism. Background Art

[0002] With the continuous development and advancement of technology, aluminum foil lunch boxes have become widely used in our lives due to their excellent sealing and thermal conductivity. Aluminum foil lunch boxes can be used not only for storing food but also for baking and steaming. Furthermore, aluminum foil lunch boxes are recyclable, helping to reduce environmental pollution and resource consumption. However, the traditional aluminum foil tableware production process requires precise control of parameters such as pressure and temperature to ensure that the aluminum foil is correctly pressed into the shape of the lunch box.

[0003] The existing problem is that in the traditional aluminum foil tableware production process, the production efficiency of the aluminum foil lunch box is seriously affected because the pressing of the aluminum foil by the lunch box mold cannot be accurately controlled. Utility Model Content

[0004] This utility model solves the technical problem in the traditional production process of aluminum foil tableware, which seriously affects the production efficiency of aluminum foil lunch boxes due to the inability to accurately control the pressing of the aluminum foil by the lunch box mold. The utility model realizes precise pressing of the aluminum foil through the drive device and rapid rebound of the pressing device through the rebound device, effectively increasing the production efficiency of aluminum foil lunch boxes.

[0005] In order to solve the above problems, the utility model provides a lunch box mold lifting mechanism, comprising: a frame, a mounting plate is provided in the frame; a lifting device, the lifting device is installed on the mounting plate; the lifting device includes a driving device and a rebound device; a pressing device, the pressing device passes through the mounting plate and is installed on the side of the mounting plate away from the lifting device, and the lifting device is connected to the pressing device; wherein, the driving device is installed on the mounting plate and connected to the pressing device; the rebound device is installed on the mounting plate and passes through the mounting plate to connect the pressing device; the driving device can drive the pressing device to move in a direction away from the mounting plate to press the lunch box; the rebound device can make the pressing device move in a direction close to the mounting plate.

[0006] Compared with the existing technology, the technical effect achieved by adopting this technical solution is as follows: the lifting device can enable the pressing device to move quickly in the direction of approaching or moving away from the aluminum foil, thereby accelerating the molding speed of the lunch box and improving production efficiency. Through the coordinated action of the driving device and the rebound device, the motion trajectory and pressing force of the pressing device can be accurately controlled, thereby improving the molding accuracy of the lunch box and ensuring stable product quality. The design of the driving device and the rebound device can more effectively utilize energy, reduce energy consumption, and reduce production costs. In addition, the setting of the lifting device and the pressing device makes the operation more stable and safe, reduces the operating risks of the operator, and improves the operational safety. The overall structural design is reasonable, and the various components are coordinated and cooperated, which improves the stability and reliability of the equipment, reduces the possibility of failure, and extends the service life of the equipment.

[0007] Furthermore, the pressing device includes: a movable shaft, one end of which passes through the mounting plate and is connected to a driving device; a fixed disk, which is fixed to the other end of the movable shaft, and a rebound device is connected to the fixed disk; wherein the driving device can drive the movable shaft to drive the fixed disk to move in a direction away from the mounting plate; the rebound device can enable the fixed disk to drive the movable shaft to move in a direction close to the mounting plate.

[0008] Compared with existing technologies, this technical solution achieves the following benefits: the design of the movable shaft and fixed plate makes the pressing mechanism more stable during movement, effectively reducing molding deviations caused by unstable movement and improving product molding precision. Furthermore, the design of the drive and rebound mechanisms allows operators to more flexibly control the movement direction and force of the pressing mechanism, thereby meeting different process requirements and improving production flexibility and adaptability. The design of the movable shaft and fixed plate reduces friction and vibration during movement, reducing equipment wear and extending its service life.

[0009] Furthermore, the pressing device also includes a heating plate, which is connected to the fixed plate via a plurality of fixing columns.

[0010] Compared with existing technologies, this solution achieves the following technical benefits: the heating plate heats the aluminum foil before pressing, accelerating the forming process and improving production efficiency. The heating plate's heating effect also smooths the foil surface, enhancing the product's appearance. The introduction of the heating plate also increases production process flexibility, allowing for adjustments to heating temperature and time to meet the production requirements of different products.

[0011] Furthermore, the pressing device also includes a movable fixing seat, which is installed through the mounting plate and is sleeved on the movable shaft.

[0012] Compared with the existing technology, the technical effect achieved by adopting this technical solution is as follows: the introduction of the movable fixing seat can better fix the movable shaft, making the movement of the pressing device more stable, thereby improving the forming accuracy. The design of the movable fixing seat can reduce the vibration and noise of the movable shaft during movement, improving the working environment and enhancing the operating comfort. Securing the movable shaft by the movable fixing seat can increase the stability of the entire pressing device and reduce the possibility of equipment failure caused by unstable movement. In addition, the movable fixing seat effectively reduces friction and vibration of the equipment during movement, which can reduce the degree of equipment wear and extend the service life of the equipment.

[0013] Furthermore, the driving device includes: a driving motor, which is installed on the mounting plate; a driving shaft, which is inserted into the driving motor; a driving roller, which is installed on the driving shaft, and the rotation of the driving shaft can drive the driving roller to rotate; wherein, the rotation of the driving roller can drive the movable shaft to move in a direction away from the driving shaft.

[0014] Compared with existing technologies, this technical solution achieves the following technical benefits: the drive motor, through the arrangement of the drive shaft and drive roller, can more efficiently rotate the drive roller, thereby improving drive efficiency and reducing energy loss. The rotation of the drive roller drives the movement of the movable shaft, making the movement of the entire pressing device more stable, improving the stability of the forming process and the consistency of product quality. By improving drive efficiency and movement stability, the forming process can be accelerated and production efficiency can be improved.

[0015] Furthermore, the lunch box mold lifting mechanism also includes a motor mounting seat; wherein the motor mounting seat is installed on a side of the mounting plate close to the drive motor, and the drive motor is fixed to the motor mounting seat.

[0016] Compared with existing technologies, this technical solution achieves the following benefits: the motor mount simplifies and facilitates drive motor installation, reducing installation complexity and time costs. The motor mount provides more stable support and fixation, making the drive motor more stable during operation and reducing the possibility of equipment failure caused by vibration and looseness. The stable motor mount reduces operational risks for the drive motor, improves operational safety, and reduces operator risk.

[0017] Furthermore, a rolling wheel is provided at one end of the movable shaft close to the driving device; the rolling wheel abuts against the driving roller, and the rotation of the driving roller drives the rolling wheel to rotate synchronously.

[0018] Compared with existing technologies, this technical solution achieves the following benefits: through the contact between the rolling wheel and the drive roller, the rotation of the drive roller directly drives the synchronous rotation of the rolling wheel, thereby improving movement efficiency and reducing energy loss. The design of the rolling wheel makes the movable shaft more stable during movement, reducing movement instability caused by friction and vibration, improving the stability of the molding process and the consistency of product quality. Furthermore, by improving movement efficiency and stability, friction and wear of the equipment during movement can be reduced, extending the equipment's service life. By improving movement efficiency and stability, the molding process can be accelerated, improving production efficiency.

[0019] Furthermore, a limiting groove is provided on the driving roller; when the rolling wheel abuts against the limiting groove, the driving roller is in an initial position.

[0020] Compared with existing technologies, this technical solution achieves the following benefits: by providing a limiting groove on the drive roller, the roller is ensured to be in its initial position when the rolling wheel abuts against the limiting groove, improving the accuracy and stability of the forming process. The limiting groove design makes it easier to determine the initial position of the drive roller, simplifying the operator's operation and reducing the possibility of operational errors. Ensuring the drive roller is in its initial position reduces adjustment and calibration time, improving production efficiency and shortening the production cycle.

[0021] Furthermore, the driving shaft is provided with a first fixing groove, and the driving roller is correspondingly provided with a second fixing groove. When the fixing block is correspondingly inserted into the first fixing groove and the second fixing groove, the driving shaft rotates, which will drive the driving roller to rotate.

[0022] Compared with existing technologies, this technical solution achieves the following technical benefits: The design of inserting the fixing block into the first and second fixing slots more effectively transmits the rotational force of the drive shaft to the drive roller, improving transmission efficiency and reducing energy loss. The insertion of the fixing block further stabilizes the connection between the drive shaft and the drive roller, reducing friction and vibration during transmission and improving transmission stability. The insertion of the fixing block also simplifies the connection between the drive shaft and the drive roller, facilitating maintenance and adjustment, and reducing the time and cost of maintenance and adjustment.

[0023] Furthermore, the rebound device includes: a rebound shaft, which passes through the mounting plate and is connected to the fixed disk; a fixing member, which is arranged at one end of the rebound shaft away from the fixed disk; and an elastic component, which is sleeved on the rebound shaft, with one end of the elastic component connected to the fixing member and the other end connected to the fixed disk.

[0024] Compared with existing technologies, this technical solution achieves the following technical benefits: The design of the rebound shaft, fixings, and elastic components allows for a more efficient rebound process, improving rebound efficiency and reducing time and energy consumption during production. The elastic components provide a more stable rebound process, reducing product quality issues caused by uneven rebound and improving production stability and consistency. The stable rebound mechanism design reduces shock and vibration during operation, minimizing wear and extending the life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the structure of a lunch box mold lifting mechanism according to an embodiment of the present invention. Figure 1 ;

[0026] Figure 2 This is a schematic diagram of the structure of a lunch box mold lifting mechanism according to an embodiment of the present invention. Figure 2 ;

[0027] Figure 3 for Figure 2 Enlarged view of area A in the middle;

[0028] Figure 4 This is a schematic diagram of the structure of a lunch box mold lifting mechanism according to an embodiment of the present invention. Figure 3 ;

[0029] Figure 5 This is a schematic diagram of the structure of a lunch box mold lifting mechanism according to an embodiment of the present invention. Figure 4 .

[0030] Description of reference numerals:

[0031] 10-frame; 20-mounting plate; 30-lifting device; 31-driving device; 311-driving motor; 312-driving shaft; 313-driving roller; 314-limiting groove; 315-first fixing groove; 316-second fixing groove; 32-rebound device; 321-rebound shaft; 322-fixing piece; 323-elastic component; 40-pressing device; 41-movable shaft; 42-fixing plate; 43-heating plate; 44-fixing column; 45-movable fixing seat; 46-rolling wheel; 50-motor mounting seat. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0033] See also Figures 1 to 5The present embodiment provides a lunch box mold lifting mechanism, comprising: a frame 10, in which a mounting plate 20 is provided; a lifting device 30, which is mounted on the mounting plate 20; the lifting device 30 includes a driving device 31 and a rebound device 32; a pressing device 40, which passes through the mounting plate 20 and is mounted on a side of the mounting plate 20 away from the lifting device 30, and the lifting device 30 is connected to the pressing device 40; wherein the driving device 31 is mounted on the mounting plate 20 and connected to the pressing device 40; the rebound device 32 is mounted on the mounting plate 20 and passes through the mounting plate 20 and is connected to the pressing device 40; the driving device 31 can drive the pressing device 40 to move in a direction away from the mounting plate 20 to press the lunch box; the rebound device 32 can make the pressing device 40 move in a direction close to the mounting plate 20.

[0034] Specifically, the mounting plate 20 is disposed inside the frame 10, and the mounting plate 20 is fixedly connected to the frame 10 on all sides. The pressing device 40 is disposed on the side of the mounting plate 20 away from the lifting device 30. The mounting plate 20 is provided with a through hole for the pressing device 40 to pass through, and the pressing device 40 is connected to the lifting device 30 through the through hole. Aluminum foil lunch boxes are usually formed by stamping aluminum foil. In this embodiment, the lifting device 30 includes a driving device 31 and a rebound device 32. The driving device 31 can drive the pressing device 40 to move away from the mounting plate 20 to stamp the aluminum foil. After the stamping is completed, the rebound device 32 will drive the pressing device 40 to reset, that is, drive the pressing device 40 to move towards the mounting plate 20.

[0035] In one embodiment of the present invention, the pressing device 40 includes: a movable shaft 41, one end of the movable shaft 41 passes through the mounting plate 20 and is connected to the driving device 31; a fixed disk 42, the fixed disk 42 is fixed to the other end of the movable shaft 41, and the rebound device 32 is connected to the fixed disk 42; wherein the driving device 31 can drive the movable shaft 41 to drive the fixed disk 42 to move in a direction away from the mounting plate 20; the rebound device 32 can enable the fixed disk 42 to drive the movable shaft 41 to move in a direction close to the mounting plate 20.

[0036] Specifically, one end of the movable shaft 41 is connected to the drive device 31, and the other end is connected to the fixed plate 42. When the drive device 31 is in operation, the drive device 31 drives the movable shaft 41, driving the fixed plate 42 away from the mounting plate 20, thereby stamping the aluminum foil. One end of the rebound device 32 is connected to the fixed plate 42, and the other end passes through the mounting plate 20 and is connected and fixed to the mounting plate 20. When stamping is completed, the drive device 31 releases the drive on the movable shaft 41, and the rebound device 32 drives the movable shaft 41 and the fixed plate 42 toward the mounting plate 20, causing the movable shaft 41 and the fixed plate 42 to return to their original position.

[0037] In one embodiment of the present invention, the pressing device 40 further includes a heating plate 43 , and the heating plate 43 is connected to the fixing plate 42 via a plurality of fixing columns 44 .

[0038] Specifically, the heating plate 43 and the fixed plate 42 are connected and fixed by six fixing posts 44. The fixing posts 44 extend through the fixed plate 42 from the side facing away from the heating plate 43 and are inserted into the heating plate 43, leaving a certain distance between the fixed plate 42 and the heating plate 43. The fixing posts 44 are provided with fixing heads on the end facing away from the fixed plate 42. The fixing heads are larger than the through-holes through which the fixing posts 44 pass through the fixed plate 42. Therefore, the fixing heads prevent the fixing posts 44 from completely passing through the fixed plate 42. During the pressing process of the aluminum foil lunch box, the heating plate 43 heats the aluminum foil to a certain temperature, making it softer and more malleable. This makes it easier for the forming tools to shape the desired lunch box shape during the pressing process. The heating effect of the heating plate 43 accelerates the deformation of the aluminum foil, thereby improving production efficiency. When heated, the aluminum foil exhibits better deformation properties, making it easier to be shaped by the forming tools, reducing forming time and energy consumption. The heating plate 43 ensures more uniform deformation of the aluminum foil, reducing stress concentration and uneven deformation during the forming process. This helps improve the molding quality and makes the edges and corners of the aluminum foil lunch box smoother and stronger.

[0039] In one embodiment of the present invention, the pressing device 40 further includes a movable fixing seat 45 . The movable fixing seat 45 is installed through the mounting plate 20 , and the movable fixing seat 45 is sleeved on the movable shaft 41 .

[0040] Specifically, the movable fixing seat 45 has a wide base and extends through the mounting plate 20 from the side away from the drive device 31. The base of the movable fixing seat 45 is connected to the mounting plate 20 via fasteners. A through-hole is defined in the center of the movable fixing seat 45 for the movable shaft 41 to pass through. The movable fixing seat 45 is sleeved onto the movable shaft 41. The movable fixing seat 45 reduces friction and vibration generated during the movement of the movable shaft 41, thereby improving the operational stability of the pressing device 40.

[0041] In one embodiment of the present invention, the driving device 31 includes: a driving motor 311, which is installed on the mounting plate 20; a driving shaft 312, which is inserted into the driving motor 311; a driving roller 313, which is installed on the driving shaft 312, and the rotation of the driving shaft 312 can drive the driving roller 313 to rotate; wherein, the rotation of the driving roller 313 can drive the movable shaft 41 to move in a direction away from the driving shaft 312.

[0042] Specifically, when the drive device 31 begins operating, the drive motor 311 rotates the drive shaft 312, which in turn drives the drive roller 313. The drive roller 313 is an irregular roller with uneven wall thickness, with some areas having thinner walls and others having thicker walls. When the drive shaft 312 drives the drive roller 313 from a thinner wall to a thicker wall, this movement causes the movable shaft 41 to be pushed away from the drive shaft 312 by the drive roller 313.

[0043] In one embodiment of the present invention, the lunch box mold lifting mechanism further includes a motor mounting seat 50 ; wherein the motor mounting seat 50 is mounted on a side of the mounting plate 20 close to the drive motor 311 , and the drive motor 311 is fixed to the motor mounting seat 50 .

[0044] Specifically, the motor mounting base 50 is fixed to the mounting plate 20 , and the drive motor 311 is mounted and fixed to the motor mounting base 50 ; the motor mounting base 50 can provide more stable support and fixation for the drive motor 311 , ensuring stable operation of the drive device 31 .

[0045] In one embodiment of the present invention, a rolling wheel 46 is provided at one end of the movable shaft 41 close to the driving device 31 ; the rolling wheel 46 abuts against the driving roller 313 , and the rotation of the driving roller 313 drives the rolling wheel 46 to rotate synchronously.

[0046] Specifically, a mounting opening is provided at one end of the movable shaft 41 near the drive device 31, and a scroll wheel 46 is mounted in the mounting opening. The scroll wheel 46 is connected to the movable shaft 41 via fasteners, and the scroll wheel 46 is rotatable relative to the movable shaft 41. The method of rotating the scroll wheel 46 driven by the drive roller 313 can reduce the friction generated when the drive roller 313 pushes the movable shaft 41, thereby improving the movement efficiency and stability of the movable shaft 41.

[0047] In one embodiment of the present invention, a limiting groove 314 is provided on the driving roller 313 ; when the rolling wheel 46 abuts against the limiting groove 314 , the driving roller 313 is in an initial position.

[0048] Specifically, the shape of the limiting groove 314 fits the shape of the rolling wheel 46. Therefore, when the rolling wheel 46 abuts against the limiting groove 314, the driving roller 313 is in the initial position and must be driven by an external force to move the driving roller 313 out of the initial position.

[0049] In one embodiment of the present invention, the drive shaft 312 is provided with a first fixed groove 315, and the drive roller 313 is correspondingly provided with a second fixed groove 316. When the fixing block is correspondingly inserted into the first fixed groove 315 and the second fixed groove 316, the drive shaft 312 rotates, which will drive the drive roller 313 to rotate.

[0050] Specifically, the first fixing groove 315 and the second fixing groove 316 together constitute the installation groove of the fixed block. Inserting the fixed block into the installation groove limits the positional relationship between the drive shaft 312 and the drive roller 313. When the drive shaft 312 rotates, it can drive the drive roller 313 to rotate together.

[0051] In one embodiment of the present invention, the rebound device 32 includes: a rebound shaft 321, the rebound shaft 321 passes through the mounting plate 20 and is connected to the fixed plate 42; a fixing member 322, the fixing member 322 is arranged at one end of the rebound shaft 321 away from the fixed plate 42; an elastic component 323, the elastic component 323 is sleeved on the rebound shaft 321, one end of the elastic component 323 is connected to the fixing member 322, and the other end is connected to the fixed plate 42.

[0052] Specifically, the rebound mechanism 32 comprises four springs, each connected to the fixed disk 42 and the mounting plate 20. The mounting plate 20 is provided with a through-hole corresponding to the rebound shaft 321, which passes through the through-hole and connects to the fixed disk 42. A fixing member 322 is provided at the top of the rebound shaft 321, away from the fixed disk 42. In this embodiment, the elastic member 323 is a spring, which is sleeved around the rebound shaft 321, with one end connected to the fixing member 322 and the other end connected to the mounting plate 20. When the drive mechanism 31 drives the fixed disk 42 away from the mounting plate 20, the spring member is pulled upward. When the drive mechanism 31 releases the drive on the fixed disk 42, the rebound of the spring member drives the fixed disk 42 toward the mounting plate 20, causing the movable shaft 41 to return to its original position.

[0053] Although the present invention is disclosed as above, it is not limited thereto. Any person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope defined by the claims.

Claims

1. A lunch box mold lifting mechanism, characterized in that: include: A frame (10), wherein a mounting plate (20) is provided in the frame (10); A lifting device (30), the lifting device (30) being mounted on the mounting plate (20); the lifting device (30) comprising a driving device (31) and a rebound device (32); a pressing device (40), the pressing device (40) passing through the mounting plate (20) and being mounted on a side of the mounting plate (20) away from the lifting device (30), the lifting device (30) being connected to the pressing device (40); The driving device (31) is mounted on the mounting plate (20) and connected to the pressing device (40); the rebound device (32) is mounted on the mounting plate (20) and passes through the mounting plate (20) to connect to the pressing device (40); the driving device (31) can drive the pressing device (40) to move in a direction away from the mounting plate (20) to press the lunch box; the rebound device (32) can enable the pressing device (40) to move in a direction close to the mounting plate (20).

2. The lunch box mold lifting mechanism according to claim 1, characterized in that: The pressing device (40) comprises: A movable shaft (41), one end of the movable shaft (41) passes through the mounting plate (20) and is connected to the driving device (31); A fixed disk (42), the fixed disk (42) being fixed to the other end of the movable shaft (41), and the rebound device (32) being connected to the fixed disk (42); The driving device (31) is capable of driving the movable shaft (41) to drive the fixed disk (42) to move in a direction away from the mounting plate (20); and the rebound device (32) is capable of causing the fixed disk (42) to drive the movable shaft (41) to move in a direction close to the mounting plate (20).

3. The lunch box mold lifting mechanism according to claim 2, characterized in that: The pressing device (40) further comprises a heating plate (43), wherein the heating plate (43) is connected to the fixed plate (42) via a plurality of fixed columns (44).

4. The lunch box mold lifting mechanism according to claim 2, characterized in that: The pressing device (40) further includes a movable fixing seat (45), the movable fixing seat (45) is installed through the mounting plate (20), and the movable fixing seat (45) is sleeved on the movable shaft (41).

5. The lunch box mold lifting mechanism according to claim 2, characterized in that: The driving device (31) comprises: a driving motor (311), the driving motor (311) being mounted on the mounting plate (20); A drive shaft (312), the drive shaft (312) being inserted into the drive motor (311); A driving roller (313), the driving roller (313) being mounted on the driving shaft (312), and the driving shaft (312) rotating can drive the driving roller (313) to rotate; The driving roller (313) rotates to drive the movable shaft (41) to move in a direction away from the driving shaft (312).

6. The lunch box mold lifting mechanism according to claim 5, characterized in that: The lunch box mold lifting mechanism also includes a motor mounting seat (50); The motor mounting seat (50) is mounted on a side of the mounting plate (20) close to the drive motor (311), and the drive motor (311) is fixed to the motor mounting seat (50).

7. The lunch box mold lifting mechanism according to claim 5, characterized in that: A rolling wheel (46) is provided at one end of the movable shaft (41) close to the driving device (31); the rolling wheel (46) abuts against the driving roller (313), and the rotation of the driving roller (313) drives the rolling wheel (46) to rotate synchronously.

8. The lunch box mold lifting mechanism according to claim 7, characterized in that: A limiting groove (314) is provided on the driving roller (313); when the rolling wheel (46) abuts against the limiting groove (314), the driving roller (313) is in an initial position.

9. The lunch box mold lifting mechanism according to claim 8, characterized in that: The driving shaft (312) is provided with a first fixing groove (315), and the driving roller (313) is correspondingly provided with a second fixing groove (316). When the fixing block is correspondingly inserted into the first fixing groove (315) and the second fixing groove (316), the driving shaft (312) rotates, which drives the driving roller (313) to rotate.

10. The lunch box mold lifting mechanism according to any one of claims 3 to 9, characterized in that: The rebound device (32) comprises: a rebound shaft (321), the rebound shaft (321) passing through the mounting plate (20) and connected to the fixed disk (42); a fixing member (322), the fixing member (322) being arranged at an end of the rebound shaft (321) away from the fixing disk (42); An elastic component (323) is sleeved on the rebound shaft (321), one end of the elastic component (323) is connected to the fixing member (322), and the other end is connected to the fixing disk (42).

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