Vacuumizing device

Abstract

The utility model belongs to the technical field of packaging equipment, and discloses a vacuumizing device which comprises a driving disc, the driving disc rotates circumferentially around the central axis of the driving disc, a cabin is rotationally connected to the driving disc, the cabin rotates relative to the driving disc in the rotating process of the driving disc so as to keep a preset posture, and a cover is hinged to the cabin. A limiting driving part is further arranged on the driving disc; a linkage part used for being matched with the limiting driving part is arranged on the cover body, and in the rotating process of the driving disc, the limiting driving part and the linkage part are switched between a limiting state and a separation state; when the limiting driving part and the linkage part are in a limiting state, the linkage part is in contact with the limiting driving part, and the cover body is limited by the limiting block and moves along with the driving disc to open the cover; and when the limiting driving part and the linkage part are in a separated state, the linkage part and the limiting driving part are separated, and the cover body synchronously rotates along with the cabin body to keep the cover closed. The vacuum chamber can be opened or closed at the preset position through a simple structure, debugging before use is not needed, and the structural size can be effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to packaging equipment technical field especially, relate to a kind of vacuumizing device. BACKGROUND

[0002] In the heat sealing process of packaging bag, the heat sealing environment of packaging bag is usually vacuumized to avoid mixing air in packaging bag and affecting the preservation period of material. The vacuum chamber is usually composed of a cabin body and a cover, so when the packaging bag is placed, the cabin body needs to be opened, and during the vacuum heat sealing process, the cabin body and the cover need to be kept closed. At present, the opening and closing of the cabin body is realized by a motion mechanism, which leads to complex equipment structure, high installation requirements, and the need to set precise action timing, thus being not conducive to structural simplification and easy debugging. SUMMARY

[0003] To solve the above technical problems, the utility model discloses a kind of vacuumizing device, opening or closing of vacuum chamber in preset position can be realized by simple structure, without front debugging, also can effectively reduce structure volume.

[0004] The specific technical scheme of the utility model is as follows:

[0005] A kind of vacuumizing device, including driving disc, the driving disc circumferentially rotates about its axis, the middle axis of the driving disc is along transverse, driving disc is rotationally connected with cabin body, cabin body rotates relative to driving disc to keep preset posture during the rotation of driving disc, lid is hinged on the cabin body;

[0006] Limiting driving part is further provided on the driving disc;The lid is provided with a linkage part for cooperating with the limiting driving part, the limiting driving part and the linkage part are switched between limiting state and separation state during the rotation of the driving disc;

[0007] When the limiting driving part and the linkage part are in limiting state, the linkage part is in contact with the limiting driving part, the lid is blocked and moves with the driving disc to open the cover;When the limiting driving part and the linkage part are in separation state, the linkage part is separated from the limiting driving part, and the lid rotates synchronously with the cabin body to keep the cover closed.

[0008] In the prior art, the vacuum chamber is usually opened and closed by a driving mechanism, the assembly of the driving mechanism needs to occupy a large space, and usually needs an independent power source, thus making the overall structure complex and the failure rate high, therefore, the application sets the limiting driving part and the linkage part which cooperate with each other, the limiting driving part blocks the linkage part, so as to avoid keeping the chamber body and the cover body closed during the movement of the driving disc, in other words, when the vacuum chamber is moved to the position where the vacuum chamber needs to be opened following the rotation of the driving disc, the limiting driving part and the linkage part can drive the cover body relative to the chamber body, so as to realize the insertion or removal of the packaging bag at the preset position; the structure does not need to set a driving mechanism which drives actively, thus does not need to configure an additional power source, thus simplifying the structure, reducing the debugging time, and reducing the failure amount caused by too many transmission members.

[0009] Preferably, the cover body and the chamber body are connected through a multi-point hinge structure, the multi-point hinge structure comprises a connecting rod one and a connecting rod two, and the connecting rod one and the connecting rod two are hinged between the chamber body and the cover body.

[0010] The multi-point hinge structure composed of the connecting rod one and the connecting rod two can reduce the rotation radius of the cover body relative to the chamber body, and can make the cover body completely separate from the chamber body during the opening of the cover, so as to reduce the structure volume and avoid the failure of the packaging bag entering the chamber due to obstruction.

[0011] Preferably, the linkage part is arranged on the multi-point hinge structure or the cover body.

[0012] The linkage part cooperates with the limiting driving part to achieve the purpose of opening the cover, therefore, when the linkage part is arranged on the multi-point hinge structure or the cover body, the movement of the cover body can be well blocked, thus meeting the requirement of opening the vacuum chamber.

[0013] Preferably, the limiting driving part is provided with a roller which cooperates with the linkage part, or the limiting driving part is a cylindrical structure.

[0014] The structure can reduce the friction between the limiting driving part and the linkage part, thus reducing the movement interference and making the opening process smoother.

[0015] Preferably, a posture maintaining mechanism is arranged between the driving disc and the chamber body, so as to keep the chamber body in a preset posture during the rotation of the driving disc.

[0016] Alternatively, the chamber body keeps the preset posture by the self-weight during the rotation of the driving disc.

[0017] In the application, the posture of the vacuum chamber can be maintained by the maintaining mechanism or the weight of the driving disc itself.

[0018] Preferably, the holding mechanism is a gear linkage mechanism or a cam linkage mechanism.

[0019] The structure is simple, convenient to set, and can well meet the attitude holding requirements of the vacuum cabin.

[0020] Preferably, when the holding mechanism is a gear linkage mechanism, the gear linkage mechanism comprises:

[0021] a gear one arranged at the center of the driving disc, the gear one being arranged stationary; and

[0022] a gear two connected with the cabin body, the gear two being in transmission connection with the gear one;

[0023] wherein, rotation of the driving disc relative to the gear one is at the same speed and opposite direction as rotation of the gear two relative to the driving disc;

[0024] When the holding mechanism is a cam linkage mechanism, the cam linkage mechanism comprises:

[0025] a stationary fixed disc arranged at one side of the driving disc, the fixed disc being provided with at least two circular grooves; and

[0026] a holding disc connected with the cabin body, the holding disc being provided with a guide part slidingly fitted in the circular groove;

[0027] wherein, the distance from the rotation axis of the cabin body on the driving disc to the rotation axis of the driving disc is consistent with the radius of the circular groove.

[0028] When the holding mechanism is a gear linkage mechanism, the gear two moves together with the cabin body, in the process, since the gear one is stationary and the gear one and the gear two are in transmission connection, the gear two drives the cabin body to rotate reversely relative to the driving disc, thus on the basis that the rotation directions of the gear one and the gear two are opposite and the rotation speeds are consistent, the vacuum cabin can be ensured to be in the preset attitude at all times to meet the actual use requirements; when the holding mechanism is a cam linkage mechanism, the holding disc is connected with the cabin body, since the holding disc and the fixed disc have the circular groove and the guide part matched with each other, in the process that the holding disc rotates together with the driving disc, the holding disc moves along the preset path, since the distance from the rotation axis of the cabin body on the driving disc to the rotation axis of the driving disc is consistent with the radius of the circular groove, the holding disc can avoid self-rotation relative to the fixed disc when moving along the preset path, thus the vacuum cabin can keep the preset attitude when rotating together with the driving disc.

[0029] Preferably, the parameters of the gear one and the gear two are consistent.

[0030] When the parameters of the first gear and the parameters of the second gear are consistent, the transmission structure between the first gear and the second gear is simple, and the consistent rotating speed of the first gear and the second gear can be well ensured.

[0031] Preferably, the first gear and the second gear are connected through a synchronous belt or a chain transmission or through a transition gear transmission.

[0032] The structure is simple, easy to realize, and has high compactness.

[0033] Preferably, a buffering mechanism is arranged between the cabin body and the cover body.

[0034] Since the closing of the vacuum cabin is due to the separation of the limiting driving part and the linkage part during the rotation of the driving disc, the cover body will impact the cabin body. In order to prevent the impact force from affecting the clamping of the packaging bag and / or vacuumizing and / or heat sealing, the buffering mechanism is arranged to offset or reduce the impact force, thereby ensuring the use stability of the vacuum cabin.

[0035] Compared with the prior art, the utility model has the advantages of simple structure, convenient use, and enabling the vacuum cabin to open at a preset position and keeping the vacuum cabin in a closed state in a certain work section during the rotation of the driving disc, thereby meeting the specific needs of vacuumizing and heat sealing. The utility model can also keep the vacuum cabin in a preset posture during use, thereby ensuring that the materials in the packaging bag fall out of the bag and ensuring the heat sealing effect. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 A schematic view of hiding a side driving disc in the embodiment of the utility model;

[0037] Figure 2 A side view of Figure 1

[0038] Figure 3 A schematic view of opening the vacuum cabin in the embodiment of the utility model;

[0039] Figure 4 A schematic view of closing the vacuum cabin in the embodiment of the utility model;

[0040] Figure 5 A front view of Figure 4

[0041] Figure 6 A front view of Figure 1

[0042] Figure 7 A schematic view of a retaining mechanism in the embodiment of the utility model;

[0043] Figure 8 ​​​It is a schematic view of a retaining mechanism in the embodiment of the utility model;

[0044] Figure 9 It is a state schematic view of the vacuum chamber located at the first station in the embodiment of the utility model;

[0045] Figure 10 It is a state schematic view of the vacuum chamber located at the second station in the embodiment of the utility model;

[0046] Figure 11 It is a state schematic view of the vacuum chamber located at the third station in the embodiment of the utility model;

[0047] Figure 12 It is a state schematic view of the vacuum chamber located at the fourth station in the embodiment of the utility model;

[0048] Figure 13 It is a state schematic view of the vacuum chamber located at the fifth station in the embodiment of the utility model.

[0049] In the drawing: 1 - driving disc; 2 - cabin body; 3 - cover body; 4 - limiting driving part; 5 - linkage part; 6 - connecting rod one; 7 - connecting rod two; 8 - roller; 9 - gear one; 10 - gear two; 11 - synchronous belt; 12 - transition gear; 13 - tension pulley; 14 - fixed disc; 15 - retaining disc; 16 - circular ring groove; 17 - guide part. DETAILED DESCRIPTION

[0050] In order to make the technical personnel in the art better understand the technical scheme of the utility model, the utility model is further explained in detail below in combination with specific implementation manners.

[0051] As Figures 1-6 shown, a kind of vacuumizing device, including driving disc 1, the driving disc 1 circumferentially rotates around its axis, the middle axis of the driving disc 1 is along transverse, driving disc 1 is rotationally connected with cabin body 2, cabin body 2 rotates relative to driving disc 1 to keep preset posture during the driving of driving disc 1, the cabin body 2 is hingedly connected with cover body 3, and cabin body 2 and cover body 3 combination constitute vacuum chamber;Limiting driving part 4 is also provided on the driving disc 1;Cover body 3 is provided with linkage part 5 for cooperating with limiting driving part 4, limiting driving part 4 and linkage part 5 are switched between limiting state and separation state during the rotation of driving disc 1;When limiting driving part 4 and linkage part 5 are in limiting state, the linkage part 5 is in contact with limiting driving part 4, and cover body 3 is limited to block and move with driving disc 1 to open cover;When limiting driving part 4 and linkage part 5 are in separation state, the linkage part 5 is separated from limiting driving part 4, and cover body 3 rotates synchronously with cabin body 2 to keep cover.

[0052] The vacuum chamber can be vacuumized during operation. The vacuumizing mechanism can be connected to the chamber body 2 or the cover body 3 to realize the vacuumizing action. During the rotation of the driving disc 1, the cover body 3 is opened from the chamber body 2 to load the packaging bag into the vacuum chamber or unload the packaging bag from the vacuum chamber when the vacuum chamber is in the opening cover section. When the vacuum chamber is in the closing cover section, the cover body 3 is closed to the chamber body 2 to realize the vacuumizing action by the vacuumizing mechanism. Since the chamber body 2 rotates relative to the driving disc 1 to maintain the preset posture during the rotation of the driving disc 1, the cover body 3 is tightly pressed on the chamber body 2 due to the negative pressure in the vacuumizing state, so that the cover body 3 and the chamber body 2 are connected as a rigid whole, the cover body 3 cannot move relative to the chamber body 2 and maintains the preset posture. When the vacuum is broken, the cover body 3 restores the freedom to move relative to the chamber body 2. When the linkage part 5 is in contact with the limiting driving part 4 and is limited, the cover body 3 cannot maintain the closing to the chamber body 2, and the linkage part 5 and the limiting driving part 4 slide relative to each other. In this process, the chamber body 2 maintains the preset posture, and the cover body 3 rotates with the driving disc 1, so that the cover body 3 and the chamber body 2 move relative to each other to realize the opening cover. In the opening cover state, the packaging bag to be vacuumized can be loaded into the chamber body 2, and then the vacuumizing and heat sealing actions are performed in the closing cover state. Then, the cycle is repeated to realize the vacuumizing and heat sealing processing. Specifically, as shown in Figures 9-13 , the vacuum chamber rotates clockwise and is located in five different positions. As shown in Figure 9 , when the vacuum chamber is located in the first position, the linkage part 5 and the limiting driving part 4 are in contact, and the chamber body 2 and the cover body 3 are still closed. With the rotation of the driving disc 1, the vacuum chamber reaches the second position as shown in Figure 10 . Since the limiting driving part 4 blocks the linkage part 5, the movement of the cover body 3 to maintain the preset posture is blocked, so that the cover body 3 rotates with the driving disc 1 and forms an angle with the chamber body 2 to realize the opening cover. As shown in Figure 11 , the third position, during the continuous rotation of the driving disc 1, the linkage part 5 and the limiting driving part 4 slide relative to each other, so that the linkage part 5 is separated from the limiting driving part 4, so that the cover body 3 rotates with the chamber body 2 to maintain the closing cover. Further as shown in Figure 12 and Figure 13The fourth station and the fifth station can be seen that after the cover is closed in the third station, the vacuum chamber is in a closed state in the fourth station and the fifth station, and the linkage part 5 and the limiting driving part 4 are in a separated state. After the vacuum chamber moves to the first station again, the linkage part 5 and the limiting driving part 4 are in contact again, and then the cover 3 is driven by the driving disc 1 to open the cover. In the embodiment, when the linkage part 5 and the limiting driving part 4 are separated, the cover 3 can be reset by its own gravity to realize the closing of the cover. The cover 3 can also be reset by the reset spring. The above structure is simple and easy to implement.

[0053] In the prior art, in addition to using a driving mechanism to realize the relative rotation of the cover 3 and the chamber 2, the cover 3 and the chamber 2 are configured as single-point hinged connection. This structure makes the distal end of the cover 3 have a long rotation radius when the cover 3 rotates relative to the chamber 2, thus causing low space utilization and easily causing the packaging bag to fail to be placed into the chamber 2. Therefore, the embodiment reduces the rotation radius of the cover 3 by using a multi-point hinged connection structure, so that the cover 3 is completely separated from the chamber 2 when the cover is opened, thereby providing more movement space for the packaging bag to ensure successful entry into the chamber. Specifically, as shown in Figure 3 and Figure 4 The cover 3 and the chamber 2 are connected by a multi-point hinged connection structure. The multi-point hinged connection structure includes a linkage rod one 6 and a linkage rod two 7, and the linkage rod one 6 and the linkage rod two 7 are hinged between the chamber 2 and the cover 3. The length of the linkage rod one 6 is greater than the length of the linkage rod two 7. Therefore, during the opening of the cover, the cover 3 can move to the upper part of the chamber 2, thereby reserving sufficient movement space for the packaging bag to be placed into the chamber 2. The cover 3 needs smaller movement space for opening and closing, and the rotation radius of the entire vacuum device can be reduced, the structure is compact, and the bag feeding device and the bag discharging device can be better and more compactly connected.

[0054] In the embodiment, the linkage part 5 is arranged on the multi-point hinged connection structure or the cover 3. The linkage part 5 can be a part of the cover 3 or a part of a linkage rod. The part of the linkage rod can also be regarded as an extension part of the cover 3. The linkage part 5 can be a fixed part relative to the cover 3 or a part that can move relative to the cover 3 to a certain extent, such as a handle with a certain degree of freedom. Further, in order to improve the movement stability between the limiting driving part 4 and the linkage part 5, the limiting driving part 4 is provided with a roller 8 matched with the linkage part 5, or the limiting driving part 4 is in a cylindrical structure.

[0055] In order to keep the packaging bag in the preset posture, the cabin 2 rotates relative to the driving disc 1 during the rotation of the driving disc 1 to keep the preset posture, and the cabin 2 can be kept by a retaining mechanism or by gravity. In the embodiment, the posture retaining mechanism is arranged between the driving disc 1 and the cabin 2 to keep the cabin 2 in the preset posture during the rotation of the driving disc 1. The retaining mechanism is a gear linkage mechanism or a cam linkage mechanism.

[0056] As shown in Figure 2 and Figure 7 , when the retaining mechanism is the gear linkage mechanism, the gear linkage mechanism comprises a gear one 9 arranged at the center of the driving disc 1 and a gear two 10 connected with the cabin 2; the gear one 9 is arranged stationary; the gear two 10 is in transmission connection with the gear one 9; the rotation of the driving disc 1 relative to the gear one 9 is at the same speed and opposite direction relative to the rotation of the gear two 10 relative to the driving disc 1. Since the gear two 10 is connected with the cabin 2 and rotates together with the driving disc 1, and the gear two 10 is in transmission connection with the gear one 9, the gear two 10 rotates opposite to the rotation direction of the driving disc 1 due to the stationary gear one 9 during the rotation of the driving disc 1. In the case that the rotation speed of the gear one 9 is consistent with the rotation speed of the gear two 10, the cabin 2 is kept in the preset posture all the time, so that the packaging bag put into the cabin 2 is kept in the posture with the bag opening upward, and the material in the packaging bag will not fall out, thereby meeting the requirement of vacuum heat sealing of the packaging bag. In order to simplify the transmission structure between the gear one 9 and the gear two 10, the parameters of the gear one 9 and the parameters of the gear two 10 are consistent, so that, as shown in Figure 2 , the gear one 9 and the gear two 10 are in transmission connection through a synchronous belt 11 or a chain, so that the rotation of the driving disc 1 relative to the gear one 9 is at the same speed and opposite direction relative to the rotation of the gear two 10 relative to the driving disc 1. In addition, as shown in Figure 7 , the gear one 9 and the gear two 10 can also be in transmission connection through a transition gear 12.

[0057] As shown in Figure 2 , in the embodiment, a plurality of vacuum cabins are arranged on the driving disc 1 along the circumferential direction, so that the gear one 9 and the gear two 10 are in transmission connection, so that the synchronous belt 11 or the chain is engaged with the gear one 9 and the gear two 10 at the same time, so that the posture of all the vacuum cabins can be kept by the retaining mechanism. Of course, a tensioning wheel 13 can be additionally arranged, which can realize the reversing of the synchronous belt 11 or the chain, increase the contact area with the gear one 9 and the gear two 10, and ensure the driving effect. In addition, as shown in Figure 7As shown, when using the transition gear 12 for transmission connection, a transition gear 12 is provided between the gear 2 10 and the gear 1 9 corresponding to each cabin 2. In this way, when the gear 1 9 rotates, all the transition gears 12 rotate synchronously and transmit power synchronously to the gear 2 10 corresponding to any transition gear 12. This also enables the synchronous attitude maintenance of all cabins 2.

[0058] like Figure 8 As shown, when the retaining mechanism is a cam linkage mechanism, the difference from the gear linkage mechanism described above is that the cam linkage mechanism includes a stationary fixed disk 14 and a retaining disk 15; the fixed disk 14 is located on one side of the drive disk 1 (hidden in the figure for ease of display), and the fixed disk 14 is provided with at least two annular grooves 16; the retaining disk 15 is connected to the cabin 2, and is provided with guide parts 17 that slide in the annular grooves 16; the distance from the rotation axis of the cabin 2 on the drive disk 1 to the rotation axis of the drive disk 1 is consistent with the radius of the annular groove 16. In this embodiment, the diameters of the multiple annular grooves 16 are consistent, and the distance from the rotation axis of the cabin 2 on the drive disk 1 to the rotation axis of the drive disk 1 is consistent with the radius of the annular groove 16. In this embodiment, the fixed disk 14 has two intersecting annular grooves 16. During the rotation of the drive disk 1, the retaining disk 15 rotates circumferentially along the drive disk 1 along with the entire cabin 2. The guide part 17 provided on the retaining disk 15 slides along the corresponding annular groove 16. The orientation of the two guide parts 17 relative to the hinge point of the cabin 2 on the drive disk 1 remains unchanged. Specifically, for example, one guide part is always located on the upper left side of the hinge point of the cabin 2 on the drive disk 1, and the other guide part is always located on the upper right side of the hinge point of the cabin 2 on the drive disk 1. Thus, the retaining disk 15 / cabin 2 can be kept in a state of attitude maintenance throughout the entire rotation of the drive disk 1. In other words, in this embodiment, by having the two guide parts 17 move along the corresponding annular groove 16 at the same speed and direction, the preset attitude of the retaining disk 15 can be ensured, thereby maintaining the preset attitude of the cabin 2.

[0059] In this embodiment, a buffer mechanism is provided between the chamber 2 and the cover 3. When the limiting drive part 4 and the linkage part 5 separate, the cover 3 is in a state of no obstruction, and can therefore rotate downwards by its own weight or a return spring. Due to the gravitational potential energy, the cover 3 exerts an impact force on the chamber 2, which may cause the vacuum chamber to shake, thus potentially affecting the vacuuming effect and / or the clamping effect and / or heat sealing effect of the packaging bag. Therefore, a buffer mechanism is provided to avoid large impacts that could lead to poor vacuuming and heat sealing effects. The buffer mechanism can be a buffer layer, such as rubber, foam, or plastic, placed on the contact surface of the chamber 2 and / or the cover 3. In other embodiments, the buffer mechanism can also be a buffer spring, damping device, etc., placed between the chamber 2 and the cover 3.

[0060] Further, as Figure 1 As shown in the embodiment, the two sides of the vacuum cabin are provided with driving discs 1, and the two driving discs 1 are in transmission connection to ensure the movement stability of the vacuum cabin.

[0061] The above is only the preferred embodiment of the present application, it should be pointed out that the above preferred embodiment should not be regarded as limiting the present application, the protection scope of the present application should be limited by the scope defined by the claims. For ordinary skilled in the art, without departing from the spirit and scope of the present application, a number of improvements and refinements can also be regarded as the protection scope of the present application.

Claims

1. A vacuum-pumping device, characterized in that The utility model provides a driving disc, the driving disc circumferentially rotates around the central axis, the central axis of driving disc is along the transverse, the cabin body is rotatably connected on the driving disc, the cabin body rotates relative to the driving disc to keep the preset posture during the rotation of driving disc, the cover body is hinged on the cabin body; The driving disc is further provided with a limiting driving part; the cover body is provided with a linkage part for cooperating with the limiting driving part, and the limiting driving part and the linkage part are switched between the limiting state and the separation state during the rotation of the driving disc; When the limiting driving part and the linkage part are in the limiting state, the linkage part is in contact with the limiting driving part, the cover body is limited and blocked to move with the driving disc to open the cover; when the limiting driving part and the linkage part are in the separation state, the linkage part is separated from the limiting driving part, and the cover body rotates synchronously with the cabin body to keep the cover closed.

2. A vacuuming device as claimed in claim 1, characterized in that The cover body and the cabin body are connected through a multi-point hinge structure, the multi-point hinge structure comprises a connecting rod one and a connecting rod two, and the connecting rod one and the connecting rod two are hinged between the cabin body and the cover body.

3. A vacuuming device as claimed in claim 2, characterized in that The linkage part is arranged on the multi-point hinge structure or the cover body.

4. A vacuuming device as claimed in claim 1, characterized in that The limiting driving part is provided with a roller matched with the linkage part, or the limiting driving part is a cylindrical structure.

5. A vacuuming device as claimed in claim 1, characterized in that A posture maintaining mechanism is arranged between the driving disc and the cabin body to keep the cabin body in the preset posture during the rotation of the driving disc. Alternatively, the cabin body keeps the preset posture by the weight during the rotation of the driving disc.

6. A vacuuming device as claimed in claim 5, characterized in that The maintaining mechanism is a gear linkage mechanism or a cam linkage mechanism.

7. A vacuuming device as claimed in claim 6, characterized in that When the maintaining mechanism is the gear linkage mechanism, the gear linkage mechanism comprises: A gear one arranged at the center of the driving disc, the gear one is arranged statically; and A gear two connected with the cabin body, the gear two is in transmission connection with the gear one; Wherein, the rotation of the driving disc relative to the gear one and the rotation of the gear two relative to the driving disc have the same speed and opposite directions; When the maintaining mechanism is the cam linkage mechanism, the cam linkage mechanism comprises: A fixed disc arranged statically, the fixed disc is located on one side of the driving disc, and the fixed disc is provided with at least two circular grooves; and A retaining disc connected with the cabin body, and the retaining disc is provided with a guide part slidingly matched with the circular groove; Wherein, the distance between the rotation axis of the cabin body on the driving disc and the rotation axis of the driving disc is consistent with the radius of the circular groove.

8. A vacuuming device as claimed in claim 7, characterized in that The parameters of the gear one and the gear two are consistent.

9. A vacuuming device as claimed in claim 8, characterized in that The gear one and the gear two are in transmission connection through a synchronous belt or a chain, or are in transmission connection through a transition gear.

10. A vacuuming device as defined in claim 1, wherein, A buffer mechanism is arranged between the cabin body and the cover body.

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