A combined processing device for automobile parts

Abstract

The present invention discloses an automobile parts combination processing device, which relates to the technical field of automobile parts processing, including a shaft seal feeding assembly on the top of a chassis body, and a bracket is provided at the middle position of the top of the chassis body; a shaft seal pressing assembly is installed on the bracket; an accessory clamping test assembly is provided below the shaft seal pressing assembly; the shaft seal feeding assembly has a sliding block for shaft seal transportation, and slide seats are fixed on both sides of the bottom of the sliding block; the slide seat is slidably connected to the slide rail; a circular groove is provided on the top of the sliding block for convenient shaft seal falling into, and a double-rod cylinder is provided at the bottom of the circular groove; the upper cylinder rod of the double-rod cylinder is provided with a tray, and a sealing disk is connected to the end of the lower cylinder rod of the double-rod cylinder; the present invention, when feeding one shaft seal, can detect the sealing between another shaft seal and the automobile parts; thereby realizing the combined processing of automobile parts, effectively reducing the labor intensity, and greatly improving the processing efficiency of automobile parts.

Description

Technical Field

[0001] The present invention relates specifically to the technical field of automobile parts processing, in particular to an automobile parts combined processing device. Background Art

[0002] An oil seal isolates lubricated transmission components from the external environment, preventing oil leakage. Typically, an oil seal is installed between the drive shaft and the mounting housing. A layer of lithium-based grease is applied between the seal lip and the drive shaft to ensure a good seal and lubrication.

[0003] After press-fitting an automotive oil seal, the following inspections and processing steps are typically required to ensure proper installation and proper functioning of the seal. Air pressure testing involves filling the seal's component with air at a certain pressure. The component is then immersed in water or soapy water is applied around the seal to observe for bubbles. If bubbles are present, this indicates a leaky seal, requiring investigation and reinstallation of the seal or repair of the affected component. For example, after press-fitting an oil seal on an engine block, this method is used to test its tightness and prevent oil leaks.

[0004] Existing oil seal press-fitting devices can only install oil seals on automotive parts. It is necessary to disassemble the automotive part with the oil seal installed and then install the automotive part on the testing equipment for air pressure testing. This requires the combined use of multiple devices and cannot achieve integrated testing of oil seal installation and sealing test. This results in high labor intensity and extremely low automotive parts processing efficiency. Summary of the Invention

[0005] The present invention aims to provide an assembly processing device for automobile parts that can install shaft seals on automobile parts and directly test the seals after installation, thereby reducing the number of devices used and eliminating the need for combination with other equipment, thereby improving the processing efficiency of automobile parts. This solves the technical problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] An automobile parts assembly processing device includes a shaft seal feeding assembly fixed to the top of a chassis, and a bracket is provided in the middle of the top of the chassis; a shaft seal pressing assembly is installed on the bracket; and a parts clamping and testing assembly is provided below the shaft seal pressing assembly.

[0008] The shaft seal feeding assembly has a sliding block for conveying the shaft seal, and sliding seats are fixed on both sides of the bottom of the sliding block; the sliding seats are slidably connected to the slide rails;

[0009] The top of the sliding block is provided with a circular groove for the shaft seal to fall into, and a double-rod cylinder is provided at the bottom of the circular groove; the upper cylinder rod of the double-rod cylinder is provided with a tray, and the end of the lower cylinder rod of the double-rod cylinder is connected to a sealing disk;

[0010] The accessory clamping test assembly includes a plurality of support pads and a clamping cylinder; the plurality of support pads and the clamping cylinder are arranged at intervals, and the support pads are provided with automobile accessories, wherein the clamping cylinder clamps the automobile accessories;

[0011] An annular sealing cylinder is provided at the bottom of the shaft hole of the automobile accessory; the annular sealing cylinder is hollow and is connected to the air source three-way connection in the air control cabinet through an air pipe, and a plurality of air outlet holes are provided on the inner side of the annular sealing cylinder.

[0012] As a further technical solution of the present invention, a rubber ring is provided on the top of the annular sealing cylinder, and the rubber ring is bonded to the annular sealing cylinder. When the automobile accessory is clamped by the clamping cylinder, the rubber ring fits tightly to the bottom of the automobile accessory shaft hole.

[0013] As a further technical solution of the present invention, there are two sliding rails, and the two sliding rails are respectively fixed on the inner sides of the two pads; the two pads are fixed above the convex plate; the sliding block is also fixed to the cylinder rod of the pushing cylinder; the pushing cylinder is fixed to the convex plate through the cylinder seat.

[0014] As a further technical solution of the present invention, two symmetrically arranged L-shaped frames are fixed on the top of the two pads, and a loading rack is slidably connected between the two L-shaped frames; a plurality of columns are fixed on the loading rack, with four columns forming a group, and a circular groove is opened under each group of columns to facilitate the falling of the shaft seal;

[0015] The bottom of the convex plate is fixed on the chassis through a supporting plate.

[0016] As a further technical solution of the present invention, one side of the loading rack is fixed to the cylinder rod of the sliding cylinder, and the sliding cylinder is fixed to the convex plate through a cylinder seat.

[0017] As a further technical solution of the present invention, the sealing disk is arranged in an inverted convex shape, and the bottom diameter of the sealing disk is larger than the diameter of the shaft seal.

[0018] As a further technical solution of the present invention, an upper shell is fixedly installed above the chassis, and a three-color warning light is fixed on the top of the upper shell; the three-color warning light is electrically connected to the control cabinet.

[0019] As a further technical solution of the present invention, the control cabinet is fixed to one side of the upper shell of the machine; an air pump is provided below the control cabinet; and the air pump is fixed to the air control cabinet.

[0020] As a further technical solution of the present invention, the shaft seal pressing assembly includes a pressing cylinder, which is fixed on the bracket, and the cylinder rod end of the pressing cylinder is connected to a pressing sleeve through a coupling; the pressing sleeve is arranged in a stepped shape, and a rubber ring is bonded to its bottom.

[0021] As a further technical solution of the present invention, a plurality of suction ports are evenly opened inside the circular groove, and air is exhausted inside the suction port through a pipe. The pipe extends to the outside of the sliding block and is connected to the exhaust fan. A plurality of sets of clamping blocks are fixedly installed at the outer edge of the circular groove 241, and a hook parallel to the circular groove is installed at one end of the clamping block.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The present invention takes shaft seal A and shaft seal B as an example. After shaft seal A is pressed into the shaft hole of an automobile accessory by the piston rod at the lower end of the double-rod cylinder, the piston rod at the upper end of the double-rod cylinder pushes out shaft seal B and sleeves onto the outside of the rubber ring at the bottom of the press-fit sleeve. At the same time, the piston rod at the lower end of the double-rod cylinder extends, so that the sealing disk is pressed onto shaft seal A. Then, the air pump is activated, and under the distribution of the air control cabinet, gas enters the annular sealing cylinder, is then discharged through the air outlet, and gathers in the cavity inside the annular sealing cylinder to form a cavity with air pressure. Then, the solenoid valve in the air control cabinet is closed, and the changes in the pressure gauge are observed. In this way, the sealing effect between shaft seal A and the automobile accessory can be obtained.

[0024] The present invention can detect the sealing performance between another shaft seal and an automobile part while loading one shaft seal; thereby realizing the combined processing of automobile parts, effectively reducing manual labor intensity, and greatly improving the processing efficiency of automobile parts;

[0025] According to the present invention, when loading the shaft seals, the stacked shaft seals are placed between the columns, and then the shaft seal at the bottom falls into the circular groove on the sliding block, and then the cylinder rod of the pushing cylinder is extended, so that the shaft seal and the circular groove are located below the shaft seal pressing assembly, so that the double-rod cylinder can lift the shaft seal; the pushing cylinder drives the sliding block to reciprocate, thereby realizing the loading of multiple shaft seals one by one, effectively saving the tedious manual loading. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0027] Figure 2 In the present invention Figure 1 Schematic diagram of the rear structure.

[0028] Figure 3 In the present invention Figure 1 main view.

[0029] Figure 4 In the present invention Figure 3 AA cross-sectional view.

[0030] Figure 5 It is a structural schematic diagram of the shaft seal feeding assembly in the present invention.

[0031] Figure 6 In the present invention Figure 1 Enlarged schematic diagram of point B.

[0032] Figure 7 In the present invention Figure 3 Enlarged schematic diagram of point C.

[0033] Figure 8 In the present invention Figure 4 Enlarged schematic diagram of point D.

[0034] Figure 9 It is an enlarged view of the sliding block in the present invention.

[0035] Figure 10 This invention Figure 9 An enlarged diagram of the middle clamping block.

[0036] In the figure: 1-chassis, 2-shaft seal feeding assembly, 3-bracket, 4-shaft seal pressing assembly, 5-accessory clamping test assembly, 6-air control cabinet, 7-air pump, 8-machine upper shell, 9-control cabinet, 10-three-color warning light;

[0037] 21-support plate, 22-convex plate, 23-pushing cylinder, 24-sliding block, 241-circular groove, 242-suction port, 243-clamping block, 2431-hook, 25-sliding seat, 26-slide rail, 27-double-rod cylinder, 28-sealing plate, 29-pad, 210-loading rack, 211-shaft seal, 212-sliding cylinder;

[0038] 41-pressing cylinder, 42-coupling, 43-pressing sleeve;

[0039] 51-supporting pad, 52-clamping cylinder, 53-automotive accessories, 54-annular sealing cylinder, 55-air outlet. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0041] See also Figures 1 to 10 In an embodiment of the present invention, an automobile parts assembly processing device includes a shaft seal feeding assembly 2 fixed to the top of a chassis 1, and a bracket 3 is provided in the middle of the top of the chassis 1; a shaft seal pressing assembly 4 is mounted on the bracket 3; and a parts clamping test assembly 5 is provided below the shaft seal pressing assembly 4;

[0042] The shaft seal feeding assembly 2 has a sliding block 24 for conveying the shaft seal, and a slide seat 25 is fixed on both sides of the bottom of the sliding block 24; the slide seat 25 is slidably connected to the slide rail 26;

[0043] The top of the sliding block 24 is provided with a circular groove 241 for the shaft seal to fall into, and a double-rod cylinder 27 is provided at the bottom of the circular groove 241; the upper cylinder rod of the double-rod cylinder 27 is provided with a tray, and the end of the lower cylinder rod of the double-rod cylinder 27 is connected to a sealing disk 28;

[0044] The accessory clamping test assembly 5 includes a plurality of support blocks 51 and a clamping cylinder 52 ; the plurality of support blocks 51 and the clamping cylinder 52 are arranged at intervals, and an automobile accessory 53 is provided on the support block 51 , wherein the clamping cylinder 52 clamps the automobile accessory 53 ;

[0045] An annular sealing cylinder 54 is provided at the bottom of the shaft hole of the automotive accessory 53 ; the annular sealing cylinder 54 is hollow and is connected to the air source in the air control cabinet 6 through an air pipe through a three-way connection, and a plurality of air outlet holes 55 are provided on the inner side of the annular sealing cylinder 54 .

[0046] More specifically, the shaft seal pressing assembly 4 includes a pressing cylinder 41, which is fixed on the bracket 3, and the cylinder rod end of the pressing cylinder 41 is connected to a pressing sleeve 43 through a coupling 42; the pressing sleeve 43 is arranged in a stepped shape, and a rubber ring is bonded to its bottom.

[0047] By adopting the above technical solution, when in use, the automobile part 53 is first placed on the multiple support blocks 51, and then the automobile part 53 is clamped and fixed by the clamping cylinder 52 and the clamping block on the cylinder rod, so that the bottom of the automobile part 53 is tightly attached to the annular sealing cylinder 54; then the shaft seal 211 is pushed out by the double-rod cylinder 27, and the shaft seal 211 is pushed up and sleeved on the outside of the rubber ring at the bottom of the press-fit sleeve 43;

[0048] Then, the rod of the pressing cylinder 41 extends, so that the pressing sleeve 43 sleeves the shaft seal 211 into the shaft hole of the automobile part 53 , thereby achieving the pressing of the shaft seal 211 into the shaft hole of the automobile part 53 .

[0049] To further illustrate, the double-rod cylinder 27 works in a manner of extending at both ends, with an air intake cavity between the two piston rods; when compressed air enters between the two piston rods, the two piston rods slide toward both ends respectively.

[0050] As an illustration of the above embodiment, taking shaft seal A and shaft seal B as an example, when shaft seal A is pressed into the shaft hole of the automotive accessory 53 by the piston rod at the lower end of the double-rod cylinder 27, the piston rod at the upper end of the double-rod cylinder 27 pushes out shaft seal B and is sleeved on the outside of the rubber ring at the bottom of the pressing sleeve 43, the piston rod at the lower end of the double-rod cylinder 27 is extended at the same time, so that the sealing disk 28 is pressed onto the shaft seal A; then the air pump 7 is activated, and under the distribution of the air control cabinet 6, the gas enters the annular sealing cylinder 54, and is then discharged through the air outlet 55, gathered in the cavity inside the annular sealing cylinder 54, and forms a cavity with air pressure; then the solenoid valve in the air control cabinet 6 is closed, and the changes in the pressure gauge are observed; in this way, the sealing effect between the shaft seal A and the automotive accessory 53 can be obtained.

[0051] By adopting the above technical solution, when loading one shaft seal, the sealing between another shaft seal and the automotive part 53 can be tested; thereby achieving combined processing of automotive parts, effectively reducing manual labor intensity, and greatly improving the processing efficiency of automotive parts.

[0052] In this embodiment, a rubber ring is provided on the top of the annular sealing cylinder 54 , and the rubber ring is bonded to the annular sealing cylinder 54 . When the automobile accessory 53 is clamped by the clamping cylinder 52 , the rubber ring fits tightly to the bottom of the shaft hole of the automobile accessory 53 .

[0053] By adopting the above technical solution, the rubber ring is tightly fitted to the bottom of the shaft hole of the automobile accessory 53, so that the uneven bottom of the automobile accessory 53 can be fitted, thereby ensuring its sealing effect and improving the air pressure sealing test effect.

[0054] In this embodiment, there are two slide rails 26, and the two slide rails 26 are respectively fixed on the inner sides of two pads 29; the two pads 29 are fixed above the convex plate 22; the sliding block 24 is also fixed to the cylinder rod of the pushing cylinder 23; the pushing cylinder 23 is fixed on the convex plate 22 through the cylinder seat.

[0055] Specifically, two symmetrical L-shaped frames are fixed to the tops of the two spacers 29, with a loading rack 210 slidably connected between them. Multiple columns are fixed to the loading rack 210, with four columns forming a group. Each group of columns has a circular groove below it to facilitate the lowering of the shaft seal. The bottom of the convex plate 22 is fixed to the chassis 1 via the support plate 21. One side of the loading rack 210 is fixed to the cylinder rod of the sliding cylinder 212, which is fixed to the convex plate 22 via a cylinder seat.

[0056] By adopting the above technical solution, when the shaft seals are loaded, the stacked shaft seals are placed between the columns, and then the shaft seal at the bottom falls into the circular groove on the sliding block 24, and then the cylinder rod of the cylinder 23 is pushed out, so that the shaft seal and the circular groove are located below the shaft seal pressing assembly 4, so that the double-rod cylinder 27 can lift the shaft seal.

[0057] The push cylinder 23 drives the sliding block 24 to reciprocate, thereby realizing the loading of multiple shaft seals one by one, effectively saving the tedious manual loading.

[0058] After one stack of shaft seals is loaded, the rod of the sliding cylinder 212 contracts, causing the loading rack 210 to slide one station, so that another stack of shaft seals can be loaded one by one.

[0059] In this embodiment, the sealing disk 28 is configured in an inverted convex shape, and the bottom diameter of the sealing disk 28 is larger than the diameter of the shaft seal.

[0060] The sealing disk 28 can fit and press the gap between the shaft seals to ensure that there is a cavity for air pressure testing under the shaft seal.

[0061] In this embodiment, an upper shell 8 is fixedly mounted above the chassis 1 , and a three-color warning light 10 is fixed on the top of the upper shell 8 ; the three-color warning light 10 is electrically connected to the control cabinet 9 .

[0062] In this embodiment, the control cabinet 9 is fixed to one side of the upper shell 8 ; an air pump 7 is provided below the control cabinet 9 ; and the air pump 7 is fixed to the air control cabinet 6 .

[0063] In this embodiment, a plurality of suction ports 242 are evenly arranged inside the circular groove 241. Air is exhausted from the interior of the suction port 242 through a pipe. The pipe extends to the outside of the sliding block 24 and is connected to the exhaust fan. A plurality of groups of clamping blocks 243 are fixedly installed at the outer edge of the circular groove 241, and a hook 2431 parallel to the circular groove 241 is installed at one end of the clamping block 243.

[0064] The working principle is as follows: when in use, the auto part 53 is first placed on the multiple support pads 51, and then the auto part 53 is clamped and fixed by the clamping cylinder 52 and the clamping block on the cylinder rod, so that the bottom of the auto part 53 is tightly attached to the annular sealing cylinder 54; then the shaft seal 211 is pushed out by the double-rod cylinder 27, and the shaft seal 211 is pushed up and sleeved on the outside of the rubber ring at the bottom of the press-fit sleeve 43;

[0065] Then, the rod of the press-fitting cylinder 41 extends, so that the press-fitting sleeve 43 sleeves the shaft seal 211 into the shaft hole of the automobile part 53, thereby achieving the press-fitting of the shaft seal 211 into the shaft hole of the automobile part 53;

[0066] Taking shaft seal A and shaft seal B as an example, when shaft seal A is pressed into the shaft hole of the automotive accessory 53 by the piston rod at the lower end of the double-rod cylinder 27, the piston rod at the upper end of the double-rod cylinder 27 pushes out shaft seal B and is sleeved on the outside of the rubber ring at the bottom of the pressing sleeve 43, the piston rod at the lower end of the double-rod cylinder 27 is extended at the same time, so that the sealing disk 28 is pressed onto the shaft seal A; then the air pump 7 is activated, and under the distribution of the air control cabinet 6, the gas enters the annular sealing cylinder 54, and is then discharged through the air outlet 55, gathered in the cavity inside the annular sealing cylinder 54, and forms a cavity with air pressure; then the solenoid valve in the air control cabinet 6 is closed, and the changes in the pressure gauge are observed; in this way, the sealing effect between the shaft seal A and the automotive accessory 53 can be obtained.

[0067] By adopting the above technical solution, when loading one shaft seal, the sealing between another shaft seal and the automotive part 53 can be tested; thereby achieving combined processing of automotive parts, effectively reducing manual labor intensity, and greatly improving the processing efficiency of automotive parts.

[0068] When the shaft seals are loaded, the stacked shaft seals are placed between the columns, and then the shaft seal at the bottom falls into the circular groove on the sliding block 24. Under the action of the gravity of the upper shaft seal, the shaft seal at the bottom is pushed to be connected to the inside of the hook 2431. In actual use, the height of the hook 2431 is fixed to the thickness of the shaft seal. At the same time, under the action of the suction port 242, the shaft seal is adsorbed to ensure that only one shaft seal can be extracted for operation at a time. Then, the cylinder rod of the cylinder 23 is pushed out, so that the shaft seal and the circular groove are located below the shaft seal pressing assembly 4, so that the double-rod cylinder 27 can lift the shaft seal.

[0069] The push cylinder 23 drives the sliding block 24 to reciprocate, thereby realizing the loading of multiple shaft seals one by one, effectively saving the tedious manual loading.

[0070] After one stack of shaft seals is loaded, the rod of the sliding cylinder 212 contracts, causing the loading rack 210 to slide one station, so that another stack of shaft seals can be loaded one by one.

[0071] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0072] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. An automobile parts assembly processing device, characterized by: It comprises a shaft seal feeding assembly (2) fixed on the top of the chassis (1), and a bracket (3) is provided at the middle position of the top of the chassis (1); a shaft seal pressing assembly (4) is installed on the bracket (3); and an accessory clamping test assembly (5) is provided below the shaft seal pressing assembly (4); The shaft seal feeding assembly (2) has a sliding block (24) for conveying the shaft seal, and slide seats (25) are fixed on both sides of the bottom of the sliding block (24); the slide seat (25) is slidably connected to the slide rail (26); The top of the sliding block (24) is provided with a circular groove (241) for the shaft seal to fall into, and a double-rod cylinder (27) is provided at the bottom of the circular groove (241); the upper cylinder rod of the double-rod cylinder (27) is provided with a tray, and the end of the lower cylinder rod of the double-rod cylinder (27) is connected to a sealing disk (28); The accessory clamping test assembly (5) comprises a plurality of support blocks (51) and a clamping cylinder (52); the plurality of support blocks (51) and the clamping cylinder (52) are arranged at intervals, and an automobile accessory (53) is provided on the support block (51), wherein the clamping cylinder (52) clamps the automobile accessory (53); An annular sealing cylinder (54) is provided at the bottom of the shaft hole of the automobile accessory (53); the annular sealing cylinder (54) is hollow and is connected to the air source in the air control cabinet (6) through an air pipe, and a plurality of air outlet holes (55) are provided on the inner side of the annular sealing cylinder (54); There are two slide rails (26), and the two slide rails (26) are respectively fixed on the inner sides of two pads (29); the two pads (29) are fixed above the convex plate (22); the sliding block (24) is also fixed to the cylinder rod of the pushing cylinder (23); the pushing cylinder (23) is fixed on the convex plate (22) through the cylinder seat; Two symmetrically arranged L-shaped frames are fixed on the top of the two pads (29), and a loading rack (210) is slidably connected between the two L-shaped frames; a plurality of columns are fixed on the loading rack (210), with four columns forming a group, and a circular groove is opened under each group of columns to facilitate the falling of the shaft seal; The bottom of the convex plate (22) is fixed to the chassis (1) via a support plate (21); One side of the loading rack (210) is fixed to the cylinder rod of the sliding cylinder (212), and the sliding cylinder (212) is fixed to the convex plate (22) via a cylinder seat.

2. The automobile parts assembly processing device according to claim 1, characterized in that: The top of the annular sealing cylinder (54) is provided with a rubber ring, which is bonded to the annular sealing cylinder (54). When the automobile accessory (53) is clamped by the clamping cylinder (52), the rubber ring is tightly fitted to the bottom of the shaft hole of the automobile accessory (53).

3. The automobile parts assembly processing device according to claim 1, characterized in that: The sealing disk (28) is arranged in an inverted convex shape, and the bottom diameter of the sealing disk (28) is larger than the diameter of the shaft seal.

4. The automobile parts assembly processing device according to claim 1, characterized in that: An upper shell (8) is fixedly mounted above the chassis (1), and a three-color warning light (10) is fixed on the top of the upper shell (8); the three-color warning light (10) is electrically connected to the control cabinet (9).

5. The automobile parts assembly processing device according to claim 4, characterized in that: The control cabinet (9) is fixed to one side of the upper shell (8); an air pump (7) is provided below the control cabinet (9); and the air pump (7) is fixed to the air control cabinet (6).

6. The automobile parts assembly processing device according to claim 1, characterized in that: The shaft seal pressing assembly (4) comprises a pressing cylinder (41), which is fixed on the bracket (3). The end of the cylinder rod of the pressing cylinder (41) is connected to a pressing sleeve (43) via a coupling (42); the pressing sleeve (43) is arranged in a stepped shape, and a rubber ring is bonded to its bottom.

7. The automobile parts assembly processing device according to claim 1, characterized in that: A plurality of suction ports (242) are evenly arranged inside the circular groove (241), and air is exhausted from the interior of the suction port (242) through a pipe. The pipe extends to the outside of the sliding block (24) and is connected to the exhaust fan. A plurality of groups of clamping blocks (243) are fixedly installed at the outer edge of the circular groove (241), and a clamping hook (2431) parallel to the circular groove (241) is installed at one end of the clamping block (243).

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