A noise reduction construction for a gravure roller engraving machine

Abstract

The application discloses a noise reduction structure for a gravure roller engraving machine, relates to the technical field of noise reduction devices, and comprises a machine body, an engraving part arranged on the top of the machine body, a noise reduction cover, a bearing plate, a top plate, side plates and an opening and closing door, wherein the bearing plate is fixed to the top of the machine body, the opening and closing door is slidably connected to the top of the machine body and is parallel to the bearing plate, the top plate is hingedly connected to the top of the bearing plate, the side plates are symmetrically arranged and are respectively hingedly connected to vertical side walls on opposite sides of the bearing plate, a control assembly, when the side plates are flipped to be in the same vertical plane as the bearing plate, the control assembly controls the top plate to be flipped to a vertical state, when the side plates are flipped to be parallel to each other, the side plates abut against the opening and closing door, the control assembly controls the top plate to be flipped to a horizontal state, and the top plate abuts against the side plates and the opening and closing door respectively, a fixing assembly, the side plates and the machine body are detachably fixed through the fixing assembly, and a plurality of noise reduction plates are arranged in the inner wall of the noise reduction cover. The application can reduce noise during production.

Description

Technical Field

[0001] This application relates to the technical field of noise reduction devices, and in particular to a noise reduction structure for a gravure printing roller engraving machine. Background Technology

[0002] Gravure printing rollers, also known as steel rollers, are commonly used in printing applications such as plastic packaging. They are steel cylinders that, after being machined, polished, and then engraved or electroplated, are used to create the gravure printing plate.

[0003] Currently, in the production of gravure printing rollers, gravure plates are usually made using an engraving machine. The engraving machine includes a turntable, a clamping fixture, and an engraving unit. The turntables are symmetrically arranged, and the clamping fixtures are placed on the turntables. The roller to be engraved is clamped between the two turntables by the clamping fixtures. Then, the turntables drive the roller to rotate, and the engraving unit engraves the roller.

[0004] However, the printing rollers are quite heavy, and using lifting equipment to hoist them during replacement and placement greatly reduces the difficulty of the process. Therefore, some engraving machines have an open setting, in which case the noise generated during printing roller production will spread in all directions. Utility Model Content

[0005] To facilitate the replacement of printing rollers while reducing noise during production, this application provides a noise reduction structure for a gravure printing roller engraving machine.

[0006] This application provides a noise reduction structure for a gravure printing roller engraving machine, employing the following technical solution:

[0007] A noise reduction structure for a gravure printing roller engraving machine includes a machine body, wherein an engraving section is provided on the top of the machine body;

[0008] A noise reduction cover is installed on the machine body and covers the engraved part;

[0009] The noise reduction cover includes a support plate, a top plate, a side plate, and an opening and closing door. The support plate is fixed to the top of the machine body, and the opening and closing door is slidably connected to the top of the machine body and parallel to the support plate.

[0010] The top plate is hinged to the top of the support plate, and the side plates are symmetrically arranged and respectively hinged to the vertical side walls on opposite sides of the support plate;

[0011] A control component, disposed on the support plate, controls the top plate to rotate to a vertical state when it is flipped relative to the side plate to be in the same vertical plane as the support plate;

[0012] When the side panels are flipped to be parallel to each other, the side panels abut against the door. The control component controls the top plate to flip to a horizontal state, and the top plate abuts against the side panels and the door respectively.

[0013] A fixing component is provided on the body, and the side plate and the body are detachably fixed together by the fixing component;

[0014] There are multiple noise reduction plates, each disposed on the inner wall of the noise reduction cover.

[0015] By adopting the above technical solution, an engraving section is set on the top of the gravure printing roller engraving machine, and a noise reduction cover is set on the machine body to cover the engraving section, which can block the noise generated during engraving from spreading outward. The noise reduction cover consists of a support plate, a top plate, side plates, and an opening and closing door. The parts are reasonably hinged and slidably connected for easy operation and adjustment. The control component can control the state of the top plate according to the position of the side plate, so that the noise reduction cover can be opened and closed flexibly, which is convenient for replacing and placing the printing roller. The fixing component realizes the detachable fixing of the side plate to the machine body, which is convenient for maintenance and repair. Multiple noise reduction plates are set on the inner wall of the noise reduction cover to further enhance the noise reduction effect.

[0016] Optionally, the control assembly includes a control belt, a control helical gear, and a connecting helical gear;

[0017] The support plate is rotatably connected to a rotating shaft for supporting the top plate, and the control helical gear is disposed on the outer periphery of the rotating shaft;

[0018] The support plate is rotatably connected to a connecting shaft for supporting the side plate, and the top of the support plate is rotatably connected to a transmission shaft. The control belt is sleeved on the connecting shaft and the outer periphery of the transmission shaft.

[0019] The connecting helical gear is disposed on the outer circumference of the transmission shaft, and the connecting helical gear meshes with the control helical gear.

[0020] By adopting the above technical solution, the control component utilizes the cooperation of the control belt, control helical gear, connecting helical gear, rotating shaft, connecting shaft, and transmission shaft to control the top plate to flip to a vertical state when the side plate is flipped to the same vertical plane as the bearing plate, and to control the top plate to flip to a horizontal state and abut against the side plate and the opening and closing door when the side plates are flipped to be parallel to each other, which facilitates the adjustment of the opening and closing state of the noise reduction cover.

[0021] Optionally, connecting gears are respectively provided on the outer periphery of the connecting shaft and the transmission shaft, and the control belt meshes with the connecting gears.

[0022] By adopting the above technical solution, in the noise reduction structure of the gravure printing roller engraving machine, a connecting gear is set on the outer periphery of the connecting shaft and the transmission shaft so that the control belt meshes with it. This can enhance the transmission stability between the control belt and the connecting shaft and the transmission shaft, and ensure that the control component can more accurately control the flipping of the top plate according to the flipping state of the side plate, so that the noise reduction cover can better realize the opening and closing function.

[0023] Optionally, noise reduction strips are provided on the side panel, and there are multiple noise reduction strips, each corresponding to one of the top panel and the opening and closing door;

[0024] When the side panels are parallel to each other, the top plate and the opening / closing door respectively abut against the corresponding noise reduction strip.

[0025] By adopting the above technical solution, noise reduction strips corresponding to the top plate and the opening and closing door are set on the side plate, and the top plate, the opening and closing door and the corresponding noise reduction strips are made to abut against each other when the side plates are parallel to each other, which further enhances the sealing performance of the noise reduction cover and improves the noise reduction effect.

[0026] Optionally, the door includes a first door panel and a second door panel;

[0027] The first door panel is symmetrically fixed to the top of the body, and the second door panel is slidably connected to the top of the body. The second door panel and the first door panel are in one-to-one correspondence and slidably connected.

[0028] By adopting the above technical solution, the opening and closing door is set as a first door panel and a second door panel. The first door panel is fixed and the second door panel is slidably connected, and the two are slidably connected to each other, which makes it convenient to open or close the opening and closing door, thereby making it easier to observe the engraving of the gravure roller and operate the machine body. At the same time, in the closed state, it can be combined with other components to form a noise reduction cover, which can effectively reduce the noise diffusion generated when the engraving machine is working.

[0029] Optionally, a partition is provided on the side of the noise reduction plate away from the noise reduction cover.

[0030] By adopting the above technical solution, the partition further enhances the sound insulation capability of the noise reduction structure, effectively reducing the outward transmission of noise during the carving process.

[0031] Optionally, the side plate includes a first plate and a second plate, the first plate being hinged to the support plate, and the second plate being hinged to the side of the first plate away from the support plate.

[0032] By adopting the above technical solution, a side plate is formed by a first plate and a second plate that can be hinged, so that the side plate can be folded, which makes it easy to adjust the shape of the noise reduction cover, facilitates the installation and disassembly of the printing roller, and can also play a normal noise reduction role during the engraving process.

[0033] Optionally, the fixing component includes a fixing pin and a fixing block;

[0034] The fixing blocks are multiple and are respectively disposed on the outer walls of the first plate and the second plate. The fixing pins are threaded to the outer wall of the machine body and correspond one-to-one with the fixing blocks. The fixing blocks are provided with fixing pin holes for the fixing pins to be inserted.

[0035] By adopting the above technical solution, the side plate (including the first plate and the second plate) and the machine body are detachably fixed by inserting the fixing pin into the fixing pin hole on the fixing block. This facilitates the movement and fixation of the side plate, thereby making it easier to maintain the engraving part or replace the printing roller. At the same time, it ensures that the side plate can be stably connected to the machine body during operation, ensuring the stability of the noise reduction cover structure and better exerting the noise reduction effect.

[0036] In summary, this application includes at least one of the following beneficial effects:

[0037] 1. A noise-reducing cover is installed on the machine body to enclose the engraving section, and multiple noise-reducing plates are installed on the inner wall of the cover. This effectively reduces the spread of noise generated during the printing roller production process, improves the working environment, and reduces noise pollution. At the same time, the control component can control the top plate to flip according to the flipping state of the side plate, so that the noise-reducing cover can be opened for easy replacement and placement of the printing roller.

[0038] 2. The side panels are foldable, which makes it easy to adjust the shape of the noise reduction cover, facilitates the installation and disassembly of the printing roller, and allows the noise reduction cover to function normally during the engraving process. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the external structure of an embodiment of this application;

[0040] Figure 2 This is a schematic diagram of the overall structure of an embodiment of this application;

[0041] Figure 3 yes Figure 2 Enlarged schematic diagram of part A;

[0042] Figure 4 yes Figure 1 Enlarged schematic diagram of part B.

[0043] Reference numerals: 1. Body; 11. Engraving section; 12. Mounting block; 2. Noise reduction cover; 3. Support plate; 31. Rotating shaft; 32. Connecting shaft; 33. Transmission shaft; 34. Connecting gear; 4. Top plate; 5. Side plate; 51. Noise reduction strip; 52. First plate; 53. Second plate; 6. Opening / closing door; 61. First door panel; 62. Second door panel; 7. Control assembly; 71. Control belt; 72. Control helical gear; 73. Connecting helical gear; 8. Fixing assembly; 81. Fixing pin; 82. Fixing block; 821. Fixing pin hole; 9. Noise reduction plate; 91. Partition. Detailed Implementation

[0044] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0045] This application discloses a noise reduction structure for a gravure printing roller engraving machine.

[0046] See Figure 1 and Figure 2 The noise reduction structure for a gravure printing roller engraving machine provided in this application includes a machine body 1. An engraving section 11 is disposed on the top of the machine body 1. The engraving section 11 includes a clamping turntable and an engraving blade. Two clamping turntables are symmetrically arranged and detachably fixed to the top of the machine body 1. During use, the machine body 1 can control the clamping turntables to move closer or further apart. The engraving blade is movably disposed on the top of the machine. During engraving, the printing roller to be engraved is first clamped and fixed between the two clamping turntables. Then, the machine body 1 is started. At this time, the engraving blade moves to the side of the printing roller to engrave the outer wall of the printing roller. Simultaneously, the printing roller is rotated by the clamping turntable, changing the engraving position of the engraving blade. In this application embodiment, the clamping and engraving of the printing roller by the machine body 1 is prior art, and therefore will not be described in detail here.

[0047] The noise reduction structure also includes a noise reduction cover 2, which is set on the machine body 1 and covers the engraving part 11, which helps to reduce the noise generated during the engraving of the printing roller.

[0048] See Figure 2 and Figure 3 Specifically, the noise reduction cover 2 includes a support plate 3, a top plate 4, side plates 5, and an opening / closing door 6. The support plate 3 is fixed to the top of the machine body 1, serving to support the noise reduction cover 2. The support plate 3 has a cuboid structure, extending horizontally along its length and parallel to the central axis of the printing roller. The support plate 3 can be made of high-strength steel, or lightweight metal materials such as aluminum alloy can be used to reduce the overall weight.

[0049] See Figure 1 and Figure 2 The opening / closing door 6 is slidably connected to the top of the machine body 1 and parallel to the support plate 3, facilitating the opening or closing of the noise reduction cover 2 for operations such as changing the printing roller. The opening / closing door 6 can be connected to the top of the machine body 1 via a slide rail, such as a linear guide rail with a "T"-shaped cross-section, making the sliding of the opening / closing door 6 smoother. The opening / closing door 6 has a cuboid structure, and its length is parallel to the length of the support plate 3.

[0050] The opening / closing door 6 includes a first door panel 61 and a second door panel 62. There are two first door panels 61, symmetrically fixed to the top of the machine body 1. The second door panels 62 are slidably connected to the top of the machine body 1, with two second door panels 62 corresponding one-to-one with the first door panels 61. The two second door panels 62 are located between the two first door panels 61, and the first door panels 61 and second door panels 62 are slidably connected. In use, the two second door panels 62 can be slid towards the two first door panels 61 on either side to open the noise reduction cover 2, facilitating close-up observation of the printing rollers on the machine body 1 or operation of the machine body 1. This structure makes the opening and closing of the opening / closing door 6 more flexible, allowing operators to adjust the opening size according to actual needs. A fixed glass window can be embedded in the upper part of the second door panel 62, facilitating observation of the printing rollers without opening the noise reduction cover 2.

[0051] See Figure 2 and Figure 3 The top of the support plate 3 has a rotating groove, and a rotating shaft 31 is rotatably connected to the support plate 3. The rotating shaft 31 is located within the rotating groove, and its central axis is parallel to the length direction of the support plate 3. The rotating shaft 31 can be a solid metal shaft to ensure its strength and stability. The top plate 4 is fixedly connected to the outer periphery of the rotating shaft 31. In the initial state, the top plate 4 is in a horizontal state, and the side of the top plate 4 away from the support plate 3 abuts against the top of the door 6. In use, the top plate 4 can be flipped upwards to a vertical state. The top plate 4 can be a flat structure, and its material can be the same as that of the support plate 3, such as steel or aluminum alloy.

[0052] Connecting grooves are respectively formed on the opposite side walls of the support plate 3 in the width direction, and the bottom of the connecting grooves extends to the outside of the support plate 3. The support plate 3 is rotatably connected to a connecting shaft 32, which is located in the connecting groove. The top side of the connecting shaft 32 is rotatably connected to the support plate 3, and the bottom side of the connecting shaft 32 is rotatably connected to the machine body 1. The connecting shaft 32 and the rotating shaft 31 are perpendicular to each other and misaligned.

[0053] See Figure 1 and Figure 3 There are two side plates 5, each corresponding to a connecting shaft 32, and the side plates 5 are fixedly connected to the outer periphery of the connecting shaft 32. In the initial state, the two side plates 5 are positioned opposite each other and parallel to each other, with the bottom of the side plates 5 abutting against the top of the machine body 1. The opening / closing door 6 is located between the two opposite side plates 5 and abuts against each other, and the top of the side plates 5 abuts against the bottom of the top plate 4. The side plates 5 are generally rectangular in shape, and their material can be the same as that of the support plate 3. When the noise reduction cover 2 needs to be opened for roller replacement or placement, the side plates 5 and the top plate 4 can be flipped accordingly; when the noise reduction cover 2 needs to be closed, they can combine to form a closed space.

[0054] The noise reduction structure also includes a control component 7, which is mounted on the support plate 3. The control component 7 includes a control belt 71, a control helical gear 72, and a connecting helical gear 73. Both ends of the rotating shaft 31 protrude beyond the support plate 3. The control helical gear 72 is fixedly connected to the outer periphery of the rotating shaft 31 and located outside the support plate 3. The top of the connecting shaft 32 protrudes beyond the support plate 3. A drive shaft 33 is rotatably connected to the top of the support plate 3. The drive shaft 33 is located directly above and perpendicular to the rotating shaft 31. The control belt 71 is connected end-to-end and sleeved on the outer periphery of the connecting shaft 32 and the drive shaft 33.

[0055] A connecting helical gear 73 is fixedly connected to the outer periphery of the drive shaft 33, and the connecting helical gear 73 meshes with the control helical gear 72. When one of the side plates 5 flips, the connecting shaft 32 rotates, which drives the drive shaft 33 to rotate via the control belt 71. This, in turn, causes the connecting helical gear 73 to drive the control helical gear 72 to rotate, ultimately achieving the upward flipping of the top plate 4. Simultaneously, when the top plate 4 flips upward, the control belt 71 on the other side drives the drive shaft 33 on the other side to rotate, which then drives the other side plate 5 to flip synchronously via the connecting helical gear 73 and the control helical gear 72 on the other side. Specifically, for example, when one of the side panels 5 is flipped to be on the same vertical plane as the support plate 3, the control component 7 controls the top plate 4 to be flipped to a vertical state, and at the same time controls the other opposite side panel 5 to be flipped to be on the same vertical plane as the support plate 3; when the side panels 5 are flipped to be parallel to each other, the side panels 5 abut against the opening and closing door 6, and the control component 7 controls the top plate 4 to be flipped to a horizontal state, and the top plate 4 abuts against the side panels 5 and the opening and closing door 6 respectively, thereby forming a closed noise reduction space.

[0056] In addition, connecting gears 34 are fixedly connected to the outer periphery of connecting shaft 32 and transmission shaft 33 respectively. Control belt 71 meshes with connecting gears 34, which can increase the transmission efficiency and stability between control belt 71 and connecting shaft 32 and transmission shaft 33, and reduce the possibility of slippage.

[0057] Noise-reducing strips 51 are fixedly connected to the outer wall of the side panel 5. There are multiple noise-reducing strips 51, and each noise-reducing strip 51 corresponds to a top panel 4 and an opening / closing door 6. When the side panels 5 are parallel to each other, the top panel 4 and the opening / closing door 6 abut against the corresponding noise-reducing strips 51. The noise-reducing strips 51 can be made of sound-absorbing cotton or other materials, which can further enhance the noise reduction effect and reduce noise leakage from the connection between the side panel 5 and the top panel 4 and the opening / closing door 6.

[0058] The side panel 5 includes a first plate 52 and a second plate 53. The first plate 52 is fixedly connected to the connecting shaft 32, and the second plate 53 is hinged to the side of the first plate 52 away from the supporting plate 3. This structure makes the side panel 5 easier to fold or unfold, and can also adapt to different working scenarios.

[0059] The noise reduction structure also includes a noise reduction plate 9 and a fixing component 8 (the fixing component 8 is in Figure 4 (As indicated by the bid), there are multiple noise reduction panels 9, which are respectively fixedly connected to the top plate 4, the first plate 52, the second plate 53, the support plate 3, and the inner wall of the opening and closing door 6 facing the carving section 11. When the side plate 5, the top plate 4, and the opening and closing door 6 abut against each other, adjacent noise reduction panels 9 abut against each other, which can further block and absorb the noise generated by the carving section 11 during operation, thereby reducing the possibility of noise spreading to the surroundings. The noise reduction panels 9 can be made of porous sound-absorbing materials, such as glass wool and mineral wool, which have good sound absorption properties and can effectively absorb the noise generated by the carving section 11.

[0060] A partition 91 is fixedly connected to the side of the noise reduction plate 9 away from the inner wall of the noise reduction cover 2. The partition 91 can reduce the damage caused by the splashing of the debris generated during the printing roller engraving of the noise reduction plate 9, and reduce the amount of debris generated during the printing roller engraving remaining on the noise reduction plate 9. It can also play a certain role in sound insulation.

[0061] See Figure 3 and Figure 4 A fixing component 8 is disposed on the body 1. The fixing component 8 includes fixing pins 81 and fixing blocks 82. Multiple fixing blocks 82 are fixedly connected to the outer walls of the first plate 52 and the second plate 53 respectively. Mounting blocks 12 are fixedly connected to the outer wall of the body 1, with each mounting block 12 corresponding to one of the fixing blocks 82, and the mounting blocks 12 are located directly below the fixing blocks 82. The fixing pins 81 are threadedly connected to the mounting blocks 12, and move vertically when the fixing pins 81 rotate. The fixing blocks 82 have fixing pin holes 821, which correspond to and are adapted to the fixing pins 81. When the two opposing side plates 5 are rotated to be parallel to each other and perpendicular to the bearing plate 3, the fixing pins 81 are rotated forward. At this time, the fixing pins 81 slide upward and insert into the fixing pin holes 821 of the fixing blocks 82, realizing the detachable fixing of the side plates 5 to the body 1, and raising the noise reduction cover 2 (the noise reduction cover 2 is in...). Figure 1 (Winning bid) Stability during operation.

[0062] The implementation principle of a noise reduction structure for a gravure printing roller engraving machine according to an embodiment of this application is as follows:

[0063] By setting a noise-reducing cover 2 to enclose the engraving section 11 and installing a noise-reducing plate 9 on the inner wall of the noise-reducing cover 2, the noise generated by the engraving section 11 during operation can be effectively blocked and absorbed, reducing the spread of noise to the surroundings. The control component 7 can automatically control the flipping of the top plate 4 according to the flipping state of the side plate 5, making it easy to open and close the noise-reducing cover 2, facilitating operations such as changing the printing roller. The opening and closing door 6 adopts a sliding connection structure of the first door plate 61 and the second door plate 62, increasing the flexibility of opening. The fixing component 8 ensures the stability of the noise-reducing cover 2 during operation.

[0064] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A noise reduction structure for a gravure printing roller engraving machine, characterized in that: Includes a body (1), and the top of the body (1) is provided with an engraving part (11); A noise reduction cover (2) is provided on the body (1) and covers the engraved part (11). The noise reduction cover (2) includes a support plate (3), a top plate (4), a side plate (5) and an opening and closing door (6). The support plate (3) is fixed to the top of the body (1), and the opening and closing door (6) is slidably connected to the top of the body (1) and parallel to the support plate (3). The top plate (4) is hinged to the top of the bearing plate (3), and the side plates (5) are symmetrically arranged and respectively hinged to the vertical side walls on opposite sides of the bearing plate (3); The control component (7) is disposed on the support plate (3). When the side plate (5) is flipped to be on the same vertical plane as the support plate (3), the control component (7) controls the top plate (4) to flip to a vertical state. When the side panels (5) are flipped to be parallel to each other, the side panels (5) abut against the door (6), and the control component (7) controls the top plate (4) to flip to a horizontal state, and the top plate (4) abuts against the side panels (5) and the door (6) respectively. A fixing component (8) is disposed on the body (1), and the side plate (5) and the body (1) are detachably fixed together by the fixing component (8); There are multiple noise reduction plates (9) and they are respectively disposed on the inner wall of the noise reduction cover (2).

2. The noise reduction structure for a gravure printing roller engraving machine according to claim 1, characterized in that: The control component (7) includes a control belt (71), a control helical gear (72), and a connecting helical gear (73). The bearing plate (3) is rotatably connected to a rotating shaft (31) for supporting the top plate (4), and the control helical gear (72) is disposed on the outer periphery of the rotating shaft (31); The support plate (3) is rotatably connected to a connecting shaft (32) for supporting the side plate (5), and the top of the support plate (3) is rotatably connected to a transmission shaft (33). The control belt (71) is sleeved on the outer periphery of the connecting shaft (32) and the transmission shaft (33). The connecting helical gear (73) is disposed on the outer periphery of the transmission shaft (33), and the connecting helical gear (73) meshes with the control helical gear (72).

3. The noise reduction structure for a gravure printing roller engraving machine according to claim 2, characterized in that: Connecting gears (34) are respectively provided on the outer periphery of the connecting shaft (32) and the transmission shaft (33), and the control belt (71) meshes with the connecting gears (34).

4. The noise reduction structure for a gravure printing roller engraving machine according to claim 1, characterized in that: The side panel (5) is provided with noise reduction strips (51), and there are multiple noise reduction strips (51) that correspond one-to-one with the top panel (4) and the door (6); When the side panels (5) are parallel to each other, the top panel (4) and the door (6) abut against the corresponding noise reduction strip (51).

5. The noise reduction structure for a gravure printing roller engraving machine according to claim 1, characterized in that: The opening and closing door (6) includes a first door panel (61) and a second door panel (62); The first door panel (61) is symmetrically fixed to the top of the body (1), and the second door panel (62) is slidably connected to the top of the body (1). The second door panel (62) and the first door panel (61) correspond to each other and are slidably connected.

6. The noise reduction structure for a gravure printing roller engraving machine according to claim 1, characterized in that: A partition (91) is provided on the side of the noise reduction plate (9) away from the noise reduction cover (2).

7. The noise reduction structure for a gravure printing roller engraving machine according to claim 1, characterized in that: The side plate (5) includes a first plate (52) and a second plate (53), the first plate (52) being hinged to the support plate (3), and the second plate (53) being hinged to the side of the first plate (52) away from the support plate (3).

8. A noise reduction structure for a gravure printing roller engraving machine according to claim 7, characterized in that: The fixing component (8) includes a fixing pin (81) and a fixing block (82); There are multiple fixing blocks (82) respectively disposed on the outer walls of the first plate (52) and the second plate (53). The fixing pins (81) are threaded to the outer wall of the machine body (1) and correspond one-to-one with the fixing blocks (82). The fixing blocks (82) are provided with fixing pin holes (821) for the fixing pins (81) to be inserted.

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