Vacuum tumbling machine

Abstract

The utility model relates to the technical field of vacuum tumbling machines, and provides a vacuum tumbling machine which comprises a vacuum tank, the vacuum tank is provided with a material opening, one side of the material opening is provided with a clamping groove, a cover body is arranged on the material opening and used for opening or closing the material opening, a pressing piece is arranged on the cover body in a swinging mode, the pressing piece is provided with a clamping part, and the clamping part is clamped into or canceled from being clamped into the clamping groove after swinging. After the clamping part is clamped into the clamping groove, the pressing piece presses the cover body on the material opening, the clamping groove is round, the clamping part is provided with at least two arc-shaped surfaces, after the clamping part enters the clamping groove, the arc-shaped surfaces and the clamping groove are concentrically arranged, the arc-shaped surfaces are used for abutting against the clamping groove, and the pressing piece is further provided with a receding notch which is located between the two arc-shaped surfaces. According to the technical scheme, the problem that a vacuum tumbler in the prior art is poor in sealing effect is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum tumblers, and specifically, to a vacuum tumbler. Background Art

[0002] In the field of food processing, the application of vacuum tumbling technology is becoming increasingly widespread. When traditional tumblers process food materials, it is often difficult to achieve a good vacuum sealing effect, which will have an adverse impact on the quality and processing efficiency of food.

[0003] For early tumblers, the sealing structure of their covers was relatively simple, usually relying solely on the direct contact between the cover and the material inlet to achieve sealing. However, this method is easily interfered by various factors, such as the vibration of the equipment, the change of internal pressure, and the wear of components caused by long-term use, resulting in gas leakage and an inability to maintain a stable vacuum environment.

[0004] In addition, the cover pressing device of traditional tumblers is complex to operate, not flexible enough, and difficult to quickly and effectively fix or loosen the cover. In actual production, this not only increases the operation time but may also affect the sealing effect due to improper operation.

[0005] At the same time, the previous sealing structure is also difficult to maintain and replace sealing components, with a high cost. The pressing force adjustment of the sealing parts is not precise enough and cannot be flexibly adjusted according to different working conditions and food material requirements, affecting the versatility and adaptability of the tumbler. Summary of the Utility Model

[0006] The utility model provides a vacuum tumbler, which solves the problem of poor sealing effect of the vacuum tumbler in related technologies.

[0007] The technical solution of the utility model is as follows:

[0008] A vacuum tumbler, comprising

[0009] a vacuum tank, the vacuum tank has a material inlet, and a card slot is provided on one side of the material inlet,

[0010] a cover body, the cover body is arranged on the material inlet for opening or closing the material inlet,

[0011] a pressing member, the pressing member is swingably arranged on the cover body, the pressing member has a clamping portion, the clamping portion swings into or out of the card slot, after the clamping portion is inserted into the card slot, the pressing member presses the cover body on the material inlet, the card slot is circular, the clamping portion has an arc surface, there are at least two arc surfaces, after the clamping portion enters the card slot, the arc surface is concentric with the card slot, the arc surface is used for abutting against the card slot, the pressing member also has a relief notch, and the relief notch is located between the two arc surfaces.

[0012] As a further technical solution, there are two card slots and two card parts, and they are symmetrically arranged. The card slot has an opening for the card part to enter or exit the card slot.

[0013] As a further technical solution, the cover body has a pressing end and an extending end. The extending end extends into the material inlet and abuts against the side wall of the material inlet. The cover body also has a first sealing surface and a second sealing surface. The first sealing surface is arranged on the end surface of the pressing end, and the second sealing surface is arranged at the abutting position between the side surface of the extending end and the side wall of the material inlet.

[0014] As a further technical solution, the cover body includes

[0015] a main body, which is arranged at the material inlet. The main body has a first sealing groove and a second sealing groove.

[0016] a first sealing member, which is arranged on the first sealing groove. The first sealing member has the first sealing surface.

[0017] a second sealing member, which is arranged in the second sealing groove. The second sealing member has a second sealing surface.

[0018] As a further technical solution, the main body also has an installation groove, which communicates with the second sealing member. It further includes

[0019] a first slider, which is arranged in the installation groove. There are two first sliders, and a pressing space is formed between the two first sliders. There are two pressing spaces. The second sealing member is pressed on the first slider.

[0020] a second slider, which is slidably arranged in the pressing space. The two ends of the second slider respectively abut against the side surfaces of one of the first sliders. After the second slider slides, the first slider moves, and the pressing space becomes larger or smaller.

[0021] As a further technical solution, the second slider has a slider extending end, and the slider extending end has a tooth part. The tooth parts of the two second sliders are arranged oppositely. It further includes

[0022] an idler gear, which is rotatably arranged in the installation groove and meshes with the tooth part.

[0023] As a further technical solution, the pressing member has a bevel gear part. It further includes

[0024] A first bevel gear is meshed with the bevel gear portion, and the first bevel gear is coaxially arranged with the idler gear.

[0025] As a further technical solution, the cover body has a through hole, and the pressing piece passes through the through hole.

[0026] As a further technical solution, the pressing piece has a handle portion.

[0027] The working principle and beneficial effects of the utility model are:

[0028] In the utility model, the vacuum tank is a core component, and the material port is a passage for the material to enter and exit. The slot on one side of the material port is circular, and the cover body is used to seal the material port to ensure a vacuum environment. The clamping piece is swingably set on the cover body, and the clamping part has at least two arc-shaped surfaces, and a clearance gap is provided between the two arc-shaped surfaces. When the material port needs to be closed, the clamping piece is swung to make the clamping part clamp into the slot. Due to the existence of the arc-shaped surface, and the arc-shaped surface is concentric with the slot after the clamping part enters the slot, so that the clamping part and the slot can fit tightly. When rolling and kneading meat ingredients, in order to maintain a vacuum state, the cover body is placed on the material port, and then the clamping piece is swung. The arc-shaped surface of the clamping part abuts against the circular slot, providing a stable clamping force. During the rolling and kneading process, the internal pressure changes, and due to the firm compression of the clamping piece, the cover body can still reliably seal the material port. The close fit between the arc-shaped surface and the slot avoids the thread wear caused by the thread setting method of the prior art during sealing, effectively prevents gas leakage, and ensures the effect of vacuum rolling and kneading. The compaction operation is completed with a simple swinging motion, saving time and manpower. The reliable seal reduces the food contamination and safety hazards that may be caused by leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present utility model.

[0030] Figure 1 It is a schematic diagram of the structure of the utility model;

[0031] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0032] Figure 3 It is a partial structural schematic diagram of the utility model;

[0033] In the figure: vacuum tank - 1, material inlet - 101, card slot - 102, opening - 103, cover body - 2, pressing end - 201, extending end - 202, first sealing surface - 203, second sealing surface - 204, main body - 205, first sealing groove - 206, second sealing groove - 207, first sealing member - 208, second sealing member - 209, installation groove - 210, pressing member - 3, clamping part - 301, arc surface - 302, relief notch - 303, bevel gear part - 304, handle part - 305, first slider - 4, pressing space - 401, second slider - 402, tooth part - 403, slider extending end - 404, idler gear - 5, first bevel gear - 6. Detailed implementation manners

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the specific implementation manners of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to these drawings, and other implementation manners can be obtained.

[0035] For the sake of simplicity of the drawings, only the parts related to the utility model are schematically shown in each drawing, and they do not represent the actual structure of the product. In addition, for the sake of simplicity and easy understanding of the drawings, in some drawings, parts with the same structure or function are only schematically shown for one of them, or only one of them is marked. In this article, "one" not only means "only this one", but also means "more than one" situation, and "several" includes "two" and "more than two".

[0036] In this article, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0037] In addition, in the description of this application, the terms "first", "second", etc. are only used for distinguishing descriptions, and cannot be understood as indicating or implying relative importance.

[0038] Refer to Figures 1 to 3, which is an embodiment of the present utility model, provides a vacuum tumbler, including a vacuum tank 1. The vacuum tank 1 has a material inlet 101, and there is a clamping groove 102 on one side of the material inlet 101. A cover body 2 is arranged on the material inlet 101 for opening or closing the material inlet 101. A pressing member 3 is swingably arranged on the cover body 2. The pressing member 3 has a clamping portion 301. After the clamping portion 301 swings, it is inserted into or removed from the clamping groove 102. After the clamping portion 301 is inserted into the clamping groove 102, the pressing member 3 presses the cover body 2 against the material inlet 101. The clamping groove 102 is circular, and the clamping portion 301 has an arc surface 302. There are at least two arc surfaces 302. After the clamping portion 301 enters the clamping groove 102, the arc surface 302 is concentric with the clamping groove 102. The arc surface 302 is used to abut against the clamping groove 102. The pressing member 3 also has a relief notch 303, and the relief notch 303 is located between the two arc surfaces 302.

[0039] In this embodiment, the vacuum tank 1 is the core component, and the material inlet 101 is the channel for materials to enter and exit. The clamping groove 102 on one side of the material inlet 101 is circular. The cover body 2 is used to seal the material inlet 101 to ensure a vacuum environment. The pressing member 3 is swingably arranged on the cover body 2. The clamping portion 301 has at least two arc surfaces 302, and there is a relief notch 303 between the two arc surfaces 302. When it is necessary to close the material inlet 101, swing the pressing member 3 to make the clamping portion 301 inserted into the clamping groove 102. Due to the existence of the arc surface 302 and the arc surface 302 being concentric with the clamping groove 102 after the clamping portion 301 enters the clamping groove 102, the clamping portion 301 can be closely attached to the clamping groove 102. When tumbling meat ingredients, to maintain the vacuum state, place the cover body 2 on the material inlet 101, and then swing the pressing member 3. The arc surface 302 of the clamping portion 301 abuts against the circular clamping groove 102, providing a firm pressing force. During the tumbling process, the internal pressure changes. Due to the firm pressing of the pressing member 3, the cover body 2 can still reliably seal the material inlet 101. The close fit between the arc surface 302 and the clamping groove 102 avoids the thread wear caused by the thread setting method in the prior art during sealing, effectively prevents gas leakage, and ensures the effect of vacuum tumbling. The pressing operation can be completed through a simple swinging action, saving time and labor. The reliable sealing reduces food contamination and safety hazards that may be caused by leakage.

[0040] Furthermore, both the clamping groove 102 and the clamping portion 301 are two and are symmetrically arranged. The clamping groove 102 has an opening 103, and the opening 103 is used for the clamping portion 301 to enter or exit the clamping groove 102.

[0041] In this embodiment, two clamping grooves 102 are symmetrically distributed on both sides of the material inlet 101 of the vacuum tank 1, and each clamping groove 102 has an opening 103. At the same time, two clamping parts 301 are also symmetrically provided on the pressing member 3 on the cover body 2. When preparing to close the material inlet 101 of the vacuum tank 1, place the cover body 2 on the material inlet 101, and then swing the pressing members 3 on both sides simultaneously, so that the clamping parts 301 smoothly enter the clamping grooves 102 through the openings 103 of the clamping grooves 102. During the tumbling operation, due to the symmetrically arranged clamping grooves 102 and clamping parts 301, the pressing force applied to the cover body 2 is evenly distributed. The two symmetric clamping grooves 102 and clamping parts 301 work together to enable the cover body 2 to receive uniform pressing force in all directions, effectively preventing the offset and leakage of the cover body 2. The operator can operate the pressing members 3 on both sides simultaneously to quickly fix the cover body 2, saving operation time. Even under long-term use and complex working environments, the symmetric structure can ensure the firm sealing of the cover body 2 and reduce the possibility of failures.

[0042] Furthermore, the cover body 2 has a pressing end 201 and an extending end 202. The extending end 202 extends into the material inlet 101 and abuts against the side wall of the material inlet 101. The cover body 2 also has a first sealing surface 203 and a second sealing surface 204. The first sealing surface 203 is arranged on the end surface of the pressing end 201, and the second sealing surface 204 is arranged at the place where the side surface of the extending end 202 abuts against the side wall of the material inlet 101.

[0043] In this embodiment, the cover body 2 has a pressing end 201 and an extending end 202. The extending end 202 can extend into the interior of the material inlet 101 and tightly abut against the side wall of the material inlet 101. In the structure of the cover body 2, a first sealing surface 203 is arranged on the end surface of the pressing end 201, and a second sealing surface 204 is arranged at the place where the side surface of the extending end 202 abuts against the side wall of the material inlet 101. When the cover body 2 is installed on the material inlet 101, the extending end 202 extends into the material inlet 101, and the second sealing surface 204 on its side forms the first sealing line of defense with the side wall of the material inlet 101. At the same time, the first sealing surface 203 on the end surface of the pressing end 201 contacts the edge of the material inlet 101 to form the second seal. During the vacuum tumbling process, the internal pressure changes. Due to this special structure of the cover body 2 and the setting of the double sealing surfaces, the airtightness of the vacuum tank 1 can be better guaranteed. The existence of the double sealing surfaces greatly reduces the possibility of gas leakage and ensures the stability of the vacuum environment. Even if there are slight problems with one of the sealing surfaces, the other sealing surface can still play a certain sealing role, providing guarantee for the normal operation of the equipment. Whether under high pressure or complex material environments, the sealing effect can be effectively maintained.

[0044] Furthermore, the cover body 2 includes a main body 205 which is disposed at the material inlet 101. The main body 205 has a first sealing groove 206 and a second sealing groove 207. A first seal 208 is disposed on the first sealing groove 206. The first seal 208 has a first sealing surface 203. A second seal 209 is disposed in the second sealing groove 207. The second seal 209 has a second sealing surface 204.

[0045] In this embodiment, the main body 205 of the cover body 2 is disposed at the material inlet 101, and is respectively provided with a first sealing groove 206 and a second sealing groove 207. The first seal 208 is installed in the first sealing groove 206, and its surface forms a first sealing surface 203. The second seal 209 is disposed in the second sealing groove 207, and its surface constitutes a second sealing surface 204. When assembling the cover body 2, the first seal 208 is accurately embedded in the first sealing groove 206, and the second seal 209 is embedded in the second sealing groove 207. When the vacuum tumbling mixer is working, the first seal 208 and the second seal 209 are respectively in close fit with the corresponding sealing grooves. When the seals are worn or aged, the seals can be replaced separately without replacing the entire cover body 2, reducing the maintenance cost. Seals with different materials and performances can be selected according to different working requirements and sealing requirements to achieve the best sealing effect. The precise fit between the seals and the sealing grooves effectively prevents the displacement and deformation of the seals during the working process, ensuring long-term stable sealing performance.

[0046] Furthermore, the main body 205 further has an installation groove 210 which communicates with the second seal 209. It further includes a first slider 4 which is disposed in the installation groove 210. There are two first sliders 4. A pressing space 401 is formed between the two first sliders 4. There are two pressing spaces 401. The second seal 209 is pressed on the first sliders 4. A second slider 402 is slidably disposed in the pressing space 401. The two ends of the second slider 402 respectively abut against the side surfaces of one first slider 4. After the second slider 402 slides, the first sliders 4 move, and the pressing space 401 becomes larger or smaller.

[0047] In this embodiment, the main body 205 not only has a first sealing groove 206 and a second sealing groove 207, but also has a mounting groove 210. Two first sliders 4 are installed in the mounting groove 210, and two pressing spaces 401 are formed between them. The second seal 209 is pressed on the first slider 4. The second slider 402 can slide within the pressing space 401. When it is necessary to adjust the pressing degree of the seal, slide the second slider 402. When the second slider 402 is slid, its two ends will push the first slider 4 to move outwards, so that the two pressing spaces 401 become larger, increasing the pressure on the second seal 209 and achieving a stable sealing effect. Through the second slider 402, the pressing degree can be precisely adjusted according to different working conditions and sealing requirements to ensure the best sealing effect. It can cope with the change of sealing performance caused by factors such as temperature change and equipment wear, and maintain good sealing by adjusting the pressing force. After installing or replacing the seal, the appropriate pressing force can be quickly found by sliding the second slider 402, improving the work efficiency.

[0048] Furthermore, the second slider 402 has a slider extension end 404, the slider extension end 404 has a tooth portion 403, the tooth portions 403 of the two second sliders 402 are arranged oppositely, and further includes an idler gear 5, the idler gear 5 is rotatably arranged in the mounting groove 210, and the idler gear 5 is meshed with the tooth portion 403.

[0049] In this embodiment, the slider extension end 404 of the second slider 402 protrudes and has a tooth portion 403. It should be noted that the tooth portions 403 of the two second sliders 402 are arranged oppositely. The idler gear 5 is rotatably arranged in the mounting groove 210 and meshes with the tooth portions 403 of the two second sliders 402. When it is necessary to synchronously adjust the positions of the two second sliders 402, operate one of the second sliders 402 to slide. Its tooth portion 403 drives the idler gear 5 to rotate, and the idler gear 5 then drives the tooth portion 403 of the other second slider 402, so that the two second sliders 402 can achieve synchronous sliding. In the actual sealing adjustment process, through this synchronous mechanism, it can be ensured that the pressures exerted by the two first sliders 4 on the second seal 209 are uniform. It ensures the accuracy and consistency of the sealing adjustment. The synchronous movement of the two second sliders 402 makes the pressing force received by the seal uniform at each part, avoiding the situation of local poor sealing. The operator does not need to adjust the two second sliders 402 separately, and only needs to operate one of them to achieve synchronous adjustment, improving the work efficiency. The uniform pressing force distribution helps to extend the service life of the seal and reduce the problems of seal wear and leakage caused by uneven pressure.

[0050] Furthermore, the pressing member 3 has a bevel tooth portion 304, and further includes a first bevel gear 6, the first bevel gear 6 is meshed with the bevel tooth portion 304, and the first bevel gear 6 is coaxially arranged with the idler gear 5.

[0051] In this embodiment, the pressing member 3 is provided with a bevel gear portion 304, and the first bevel gear 6 is meshed with the bevel gear portion 304, and the first bevel gear 6 is coaxial with the idler gear 5. When closing the material inlet 101, only the pressing member 3 needs to be rotated. The bevel gear portion 304 of the pressing member 3 drives the first bevel gear 6 to rotate. Since the first bevel gear 6 is coaxial with the idler gear 5, the idler gear 5 is driven to rotate. By rotating the pressing member 3, the pressing force on the sealing member can be indirectly adjusted, realizing the pressing of the cover body 2 and the sealing of the side wall of the material inlet 101 by the second sealing member 209. There is no need to directly operate the second slider 402 or the first slider 4. By rotating the pressing member 3, the operation can be completed, which is more convenient and flexible. Multiple components are connected by a clever gear drive, reducing complex mechanical structures and saving space. Through the gear transmission ratio, the change of the pressing force can be more accurately controlled to meet different sealing requirements.

[0052] Furthermore, the cover body 2 has a through hole, and the pressing member 3 penetrates through the through hole.

[0053] In this embodiment, a through hole is provided on the cover body 2, and the pressing member 3 can penetrate through this through hole. During assembly, the pressing member 3 can smoothly pass through the through hole to achieve connection and cooperation with the cover body 2. During the operation of the equipment, since the pressing member 3 penetrates through the through hole, the movement of the pressing member 3 can directly act on the cover body 2 to achieve the pressing and fixing of the cover body 2. The accuracy and directness of the pressing action are ensured. The pressing member 3 is in direct contact with the cover body 2 through the through hole, avoiding losses and deviations during the force transmission process, and ensuring the reliability of the pressing effect. The design of the through hole makes the combination of the pressing member 3 and the cover body 2 closer, reducing unnecessary space occupation and making the structure of the entire equipment more concise. The connection between the pressing member 3 and the cover body 2 through the through hole is more stable, and it is not easy to loosen or misalign, ensuring the stability and safety of the equipment during operation.

[0054] Furthermore, the pressing member 3 has a handle portion 305.

[0055] In this embodiment, the pressing member 3 has a specially designed handle portion 305. The handle portion 305 is a protruding, ergonomic grip, and its surface may have anti-slip textures or be wrapped with rubber material to increase friction and comfort. When it is necessary to close or open the cover body 2, the operator can directly hold the handle portion 305 to operate. The handle portion 305 provides a clear and comfortable force application point, enabling the operator to easily swing the pressing member 3 without having to search for the force application point laboriously. By holding the handle portion 305, the swinging amplitude and force of the pressing member 3 can be more accurately controlled to ensure that the pressing or loosening action is accurate. The comfortable design of the handle portion 305 reduces the fatigue of the hand, making long-term operation relatively easy.

[0056] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A vacuum tumbling machine, characterized in that: include A vacuum tank (1), wherein the vacuum tank (1) has a material opening (101), and a slot (102) is provided on one side of the material opening (101). a cover body (2), the cover body (2) being arranged on the material opening (101) and being used to open or close the material opening (101), A pressing member (3), the pressing member (3) being swingably arranged on the cover body (2), the pressing member (3) having a clamping portion (301), the clamping portion (301) being clamped into or un-clamped into the clamping slot (102) after being swung, the pressing member (3) pressing the cover body (2) onto the material opening (101) after the clamping portion (301) is clamped into the clamping slot (102), the clamping member (3) pressing the cover body (2) onto the material opening (101), the clamping slot (102) being circular, the clamping portion (301) 1) having an arcuate surface (302), wherein the arcuate surfaces (302) are at least two, and after the clamping portion (301) enters the clamping slot (102), the arcuate surface (302) is arranged concentrically with the clamping slot (102), and the arcuate surface (302) is used to abut against the clamping slot (102), and the pressing member (3) further has a clearance notch (303), and the clearance notch (303) is located between the two arcuate surfaces (302).

2. A vacuum tumbling machine according to claim 1, characterized in that: The card slot (102) and the card portion (301) are both two in number and are symmetrically arranged; the card slot (102) has an opening (103); the opening (103) is used for the card portion (301) to enter or move out of the card slot (102).

3. A vacuum tumbling machine according to claim 1, characterized in that: The cover body (2) has a clamping end (201) and an extending end (202), wherein the extending end (202) extends into the material opening (101) and abuts against the side wall of the material opening (101), and the cover body (2) also has a first sealing surface (203) and a second sealing surface (204), wherein the first sealing surface (203) is arranged on the end surface of the clamping end (201), and the second sealing surface (204) is arranged at the side surface of the extending end (202) abutting against the side wall of the material opening (101).

4. A vacuum tumbling machine according to claim 3, characterized in that: The cover body (2) comprises A main body (205), the main body (205) being arranged at the material inlet (101), the main body (205) having a first sealing groove (206) and a second sealing groove (207), a first sealing member (208), the first sealing member (208) being arranged on the first sealing groove (206), the first sealing member (208) having the first sealing surface (203), A second sealing member (209), wherein the second sealing member (209) is disposed in the second sealing groove (207), and the second sealing member (209) has a second sealing surface (204).

5. A vacuum tumbling machine according to claim 4, characterized in that: The main body (205) further comprises a mounting groove (210), wherein the mounting groove (210) is in communication with the second sealing member (209), and further comprises a first slider (4), the first slider (4) being arranged in the mounting groove (210), the number of the first sliders (4) being two, a compression space (401) being formed between the two first sliders (4), the number of the compression spaces (401) being two, the second sealing member (209) being pressed onto the first slider (4), A second slider (402), the second slider (402) is slidably arranged in the compression space (401), the two ends of the second slider (402) respectively abut against a side surface of the first slider (4), and after the second slider (402) slides, the first slider (4) moves, and the compression space (401) becomes larger or smaller.

6. A vacuum tumbling machine according to claim 5, characterized in that: The second slider (402) has a slider extension end (404), the slider extension end (404) has a tooth portion (403), the tooth portions (403) of the two second sliders (402) are arranged opposite to each other, and further comprises: An idle gear (5), the idle gear (5) being rotatably disposed in the mounting groove (210), the idle gear (5) being meshed with the tooth portion (403).

7. A vacuum tumbling machine according to claim 6, characterized in that: The pressing piece (3) has a bevel gear portion (304), and further comprises A first bevel gear (6), the first bevel gear (6) being arranged in meshing engagement with the bevel gear portion (304), and the first bevel gear (6) being arranged coaxially with the idler gear (5).

8. The vacuum tumbling machine according to claim 1, characterized in that: The cover body (2) has a through hole, and the pressing piece (3) passes through the through hole.

9. The vacuum tumbling machine according to claim 1, characterized in that: The pressing piece (3) has a handle portion (305).

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