A positive pressure protection device

Abstract

The utility model relates to a kind of positive pressure protection devices, including base, guide rail, workstation, workstation is slidably arranged on guide rail, the both sides of workstation are respectively provided with telescopic first dust cover, the both ends of guide rail are fixedly provided with sealing cover, two sealing covers are respectively connected with the first dust cover of corresponding side, gas blowing pipe is equipped in the space enclosed by first dust cover on base, the top of two sealing covers is jointly erected with dust cover, the workstation is equipped with the avoidance position of dust cover adaptation, drive assembly for driving workstation to move is further equipped in the space enclosed by first dust cover on base, dustproof assembly is equipped on drive assembly, closed space is formed by telescopic first dust cover and sealing cover, then positive pressure environment is formed by blowing gas into closed space by gas blowing pipe, actively prevent external pollutants from invading through gap using air pressure difference.

Description

Technical Field

[0001] This utility model relates to the field of machine tool protection technology, specifically to a positive pressure protection device. Background Technology

[0002] In the field of precision machining, lead screws and guide rails, as core transmission components, directly determine the machining quality and stability of the equipment through their operating accuracy and service life. However, contaminants such as iron filings, dust, and splashed coolant generated during machining can easily penetrate the threaded surfaces of the lead screws and the sliding surfaces of the guide rails, causing component wear, transmission jamming, and even loss of precision. Traditional dust covers can only passively block larger particles of contaminants. When the dust cover extends and retracts with the worktable, gaps easily form between its edges and the fixed components, allowing contaminants to penetrate through these gaps. This results in limited ability to block fine dust and liquid coolant. Once these tiny contaminants enter the mating gaps between the lead screw and the guide rail, they will form abrasive particles during movement, accelerating component fatigue wear. This not only increases the frequency and cost of equipment maintenance but may also affect production schedules due to sudden malfunctions. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a positive pressure protection device.

[0004] The objective of this utility model can be achieved through the following technical solution: A positive pressure protection device includes a base, a guide rail, and a worktable. The worktable is slidably mounted on the guide rail. Retractable first dust covers are provided on both sides of the worktable. A cover is fixedly provided at both ends of the guide rail. The two covers are respectively connected to the first dust covers on the corresponding sides. An air blowing pipe is provided on the base within the space enclosed by the first dust covers. A dust cover is mounted on the top of the two covers. An clearance position adapted to the dust cover is provided on the worktable. A drive component for driving the worktable to move is also provided on the base within the space enclosed by the first dust covers. A dust cover component is provided on the drive component.

[0005] Preferably, the drive assembly includes a lead screw rotatably mounted on the base, a lead screw nut seat at the bottom of the worktable, a lead screw nut threadedly connected to the lead screw on the lead screw nut seat, and a servo motor drivingly connected to one end of the lead screw.

[0006] Preferably, the dustproof assembly includes dustproof brackets disposed on both sides of the lead screw, and a second dustproof cover slidably connected to the dustproof bracket on both sides of the lead screw nut seat. One end of the dustproof bracket is connected to the housing of the servo motor, and the other end is provided with a cover plate. One end of the two second dustproof covers is fixedly connected to the cover plate on the corresponding side and the housing of the servo motor, respectively.

[0007] Preferably, side plates are fixed on both sides of the guide rail on the base, and baffles are protruding on the side plates. A matching slot is opened on the inner side of the first dust cover corresponding to the position of the baffle. An inclined guide surface is provided below the baffle, and the side end of the first dust cover slides against the guide surface.

[0008] Preferably, the bottom of the worktable is provided with a baffle, and a brush that fits against the guide surface is installed at the bottom of the baffle.

[0009] Preferably, the air blowing pipes are arranged parallel to both sides of the guide rail, and multiple air holes are spaced apart on the pipe wall, with the opening direction of the air holes facing the gap between the side plate and the first dust cover.

[0010] The beneficial effects of this utility model are as follows: a retractable first dust cover and a sealing cover form a closed space, and air is blown into the closed space through an air blowing pipe to create a positive pressure environment. The air pressure difference actively prevents external pollutants from entering through gaps, while the dustproof components on the drive assembly further block trace impurities that may remain in the closed space. This effectively solves the problem that traditional physical protection is difficult to deal with gap contamination, significantly improves the reliability of protection for lead screws and guide rails, and extends the service life and accuracy retention of components. Attached Figure Description

[0011] The present invention will be further described with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present invention. For those skilled in the art, other drawings can be obtained based on the following drawings without creative effort.

[0012] Figure 1 This is a structural schematic diagram of a positive pressure protection device according to the present invention.

[0013] Figure 2 This is another structural schematic diagram of a positive pressure protection device according to the present invention.

[0014] Figure 3 This is a schematic diagram of the dustproof component structure of a positive pressure protection device according to the present invention.

[0015] Figure 4 for Figure 1 A partial schematic diagram of point A in the middle.

[0016] Figure 5 for Figure 2 A partial schematic diagram of point B in the middle.

[0017] Figure 6 for Figure 3 A partial schematic diagram at point C.

[0018] The labels in the diagram represent: 1. Base; 2. Guide rail; 3. Workbench; 4. First dust cover; 5. Cover; 6. Air pipe; 7. Dust cover; 8. Clearance; 9. Drive assembly; 901. Lead screw; 902. Lead screw nut seat; 903. Lead screw nut; 904. Servo motor; 10. Dustproof assembly; 1001. Dustproof bracket; 1002. Second dust cover; 1003. Cover plate; 11. Side plate; 12. Stop bar; 13. Slot; 14. Guide surface; 15. Baffle; 16. Brush; 17. Air hole. Detailed Implementation

[0019] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0020] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0021] The technical solution of this utility model will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] See Figures 1 to 6As shown, the structure of this utility model is as follows: a positive pressure protection device, including a base 1, a guide rail 2, and a worktable 3. The worktable 3 is slidably mounted on the guide rail 2. Retractable first dust covers 4 are provided on both sides of the worktable 3. A cover 5 is fixedly provided at both ends of the guide rail 2, and the two covers 5 are respectively connected to the first dust covers 4 on the corresponding sides. An air blowing pipe 6 is provided on the base 1 within the space enclosed by the first dust covers 4. A dust cover 7 is mounted on the top of the two covers 5. A clearance position 8 adapted to the dust cover 7 is provided on the worktable 3. A drive assembly 9 for moving the worktable 3 is also provided on the base 1 within the space enclosed by the first dust covers 4. A dust cover assembly 10 is provided on the drive assembly 9. Specifically, the base 1 serves as the mounting foundation for the entire device, providing stable support for components such as the guide rail 2 and the drive assembly 9; the guide rail 2 guides the worktable 3 to slide precisely along a preset trajectory, ensuring its motion accuracy. The retractable first dust covers 4 on both sides of the workbench 3 cooperate with the caps 5 at both ends of the guide rail 2 to prevent external dust and iron filings from entering. The dust cover 7 on the top of the cap 5 provides further protection from above, preventing iron filings from falling directly onto the first dust cover 4 and causing it to be punctured during retraction. The clearance space 8 provides space for the workbench 3 to move, ensuring that the workbench 3 does not interfere with movement. On this basis, the air blowing pipe 6 on the base 1 blows air into the enclosed space to create a positive pressure environment, actively preventing external dust and iron filings from entering through the air pressure difference. The drive component 9 provides power to the workbench 3, and the dustproof component 10 specifically protects the drive component 9 to ensure its stable operation in a clean environment.

[0023] like Figure 3 As shown, the drive assembly 9 includes a lead screw 901 rotatably mounted on the base 1, a lead screw nut seat 902 at the bottom of the worktable 3, and a lead screw nut 903 threadedly connected to the lead screw 901 on the lead screw nut seat 902. One end of the lead screw 901 is connected to a servo motor 904. Specifically, the servo motor 904 outputs power to drive the lead screw 901 to rotate. The lead screw 901 and the lead screw nut 903 on the lead screw nut seat 902 at the bottom of the worktable 3 form a threaded transmission, converting the rotational motion into linear motion, so that the lead screw nut seat 902 drives the worktable 3 to slide smoothly along the guide rail 2.

[0024] like Figure 3As shown, the dustproof assembly 10 includes dustproof brackets 1001 disposed on both sides of the lead screw 901. Both sides of the lead screw nut seat 902 are provided with second dust covers 1002 that are slidably connected to the dustproof brackets 1001. One end of the dustproof bracket 1001 is connected to the housing of the servo motor 904, and the other end is provided with a cover plate 1003. One end of each of the two second dust covers 1002 is fixedly connected to the cover plate 1003 on the corresponding side and the housing of the servo motor 904, respectively. Specifically, the dustproof bracket 1001 provides stable sliding support for the second dust covers 1002. When the lead screw nut seat 902 moves the worktable 3, the second dust covers 1002 extend and retract synchronously with it. One end of each of the two second dust covers 1002 is sealed to the cover plate 1003 and the housing of the servo motor 904, respectively, forming an independent enclosed space enclosing the lead screw 901. This structure effectively prevents dust, iron filings and other impurities from entering the mating surface of the lead screw 901 and the lead screw nut 903, avoiding wear or jamming of the transmission components due to contamination, and ensuring the long-term stable operation of the drive assembly 9.

[0025] like Figure 1 , Figure 5 As shown, side plates 11 are fixed on both sides of the guide rail 2 on the base 1. A baffle 12 protrudes from the side plate 11. A matching groove 13 is formed on the inner side of the first dust cover 4 corresponding to the position of the baffle 12. An inclined guide surface 14 is provided below the baffle 12. The side end of the first dust cover 4 slides against the guide surface 14. Specifically, the baffle 12 on the side plate 11 fits into the groove 13 on the inner side of the first dust cover 4, enhancing the sealing performance and reducing the possibility of dust and iron filings intruding from side gaps. The inclined angle of the guide surface 14 below the baffle 12 allows iron filings falling on the surface to automatically slide off under gravity, preventing them from accumulating and being carried into the protected space. Simultaneously, the sliding contact between the side end of the first dust cover 4 and the guide surface 14 further enhances the sealing effect.

[0026] like Figure 4 As shown, the bottom of the workbench 3 is equipped with a baffle 15, and a brush 16 that fits against the guide surface 14 is installed on the bottom of the baffle 15. Specifically, the baffle 15 moves synchronously with the workbench 3, and the brush 16 at its bottom fits tightly against the guide surface 14. During the movement, it can clean up the tiny impurities remaining on the guide surface 14, preventing them from adhering to or entering critical areas such as the first dust cover 4 and the drive assembly 9. The flexible contact of the brush 16 not only ensures the cleaning effect but also helps to enhance the sealing between the baffle 15 and the guide surface 14.

[0027] like Figure 6As shown, the air blowing pipe 6 is arranged parallel to both sides of the guide rail 2. Multiple air holes 17 are spaced apart on the pipe wall of the air blowing pipe 6. The opening direction of the air holes 17 is towards the gap between the side plate 11 and the first dust cover 4. Specifically, the air blowing pipes 6 on both sides of the guide rail 2 are arranged parallel to the guide rail 2. One end of the air blowing pipe 6 is blocked, and the other end is connected to the external air source. The air holes 17 spaced apart along the length of the air blowing pipe 6 blow air in a directional manner towards the gap between the side plate 11 and the first dust cover 4. The air pressure difference is used to prevent external dust and iron filings from entering the enclosed space through the gap. At the same time, the directional airflow can also directly blow away the dust and iron filings attached to the gap.

[0028] In practical use, the drive assembly 9 drives the workbench 3 to slide along the guide rail 2. At this time, the retractable first dust cover 4 on both sides of the workbench 3 moves synchronously with the movement of the workbench 3. The first dust cover 4 on the side closer to the direction of movement of the workbench 3 is compressed, and the one on the other side is stretched. The first dust cover 4 always remains connected to the caps 5 at both ends of the guide rail 2, ensuring that the space enclosed by the two is always in a closed state to prevent external dust and iron filings from entering. At the same time, the dust cover 7 continuously protects from above to prevent iron filings from falling directly onto the first dust cover 4 and causing it to be punctured when it retracts. During the movement of the workbench 3, the air blowing pipe 6 on the base 1, located in the space enclosed by the first dust cover 4, continuously blows air into the space to form a positive pressure environment, which actively prevents external dust and iron filings from entering through the air pressure difference. The dustproof assembly 10 on the drive assembly 9 specifically protects the drive assembly 9 to ensure its stable operation in a clean environment.

[0029] The present invention has been further described above with reference to specific embodiments. However, it should be understood that the specific description herein should not be construed as limiting the substance and scope of the present invention. Various modifications made by those skilled in the art to the above embodiments after reading this specification are all within the scope of protection of the present invention.

Claims

1. A positive pressure protective device, characterized by: The system includes a base (1), a guide rail (2), and a worktable (3). The worktable (3) is slidably mounted on the guide rail (2). The worktable (3) is provided with retractable first dust covers (4) on both sides. Both ends of the guide rail (2) are fixedly provided with caps (5). The two caps (5) are respectively connected to the first dust covers (4) on the corresponding side. The base (1) is provided with an air blowing pipe (6) within the space enclosed by the first dust covers (4). The tops of the two caps (5) are jointly supported by a dust cover (7). The worktable (3) is provided with a clearance position (8) adapted to the dust cover (7). The base (1) is also provided with a drive assembly (9) for driving the worktable (3) to move within the space enclosed by the first dust cover (4). The drive assembly (9) is provided with a dust cover assembly (10).

2. The positive pressure guard of claim 1, wherein: The drive assembly (9) includes a lead screw (901) rotatably mounted on the base (1), a lead screw nut seat (902) is provided at the bottom of the worktable (3), a lead screw nut (903) is provided on the lead screw nut seat (902) and threadedly connected to the lead screw (901), and a servo motor (904) is driven to one end of the lead screw (901).

3. The positive pressure guard of claim 2, wherein: The dustproof assembly (10) includes dustproof brackets (1001) disposed on both sides of the lead screw (901). Both sides of the lead screw nut seat (902) are provided with second dust covers (1002) that are slidably connected to the dustproof brackets (1001). One end of the dustproof bracket (1001) is connected to the housing of the servo motor (904), and the other end is provided with a cover plate (1003). One end of each of the two second dust covers (1002) is fixedly connected to the cover plate (1003) on the corresponding side and the housing of the servo motor (904).

4. The positive pressure guard of claim 1, wherein: Side plates (11) are fixed on both sides of the guide rail (2) on the base (1). A baffle (12) is protruding on the side plate (11). A matching slot (13) is opened on the inner side of the first dust cover (4) corresponding to the position of the baffle (12). An inclined guide surface (14) is provided below the baffle (12). The side end of the first dust cover (4) slides against the guide surface (14).

5. The positive pressure guard of claim 4, wherein: The bottom of the workbench (3) is provided with a baffle (15), and a brush (16) that fits against the guide surface (14) is installed on the bottom of the baffle (15).

6. The positive pressure guard of claim 4, wherein: The air blowing pipe (6) is arranged parallel to both sides of the guide rail (2). Multiple air holes (17) are spaced apart on the pipe wall of the air blowing pipe (6). The opening direction of the air holes (17) is towards the gap between the side plate (11) and the first dust cover (4).

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