A new waterproof linear guide rail module structure

Abstract

The application relates to the technical field of linear guide rail modules, in particular to a novel waterproof linear guide rail module structure, which comprises a main frame, a sliding assembly, a sealing cover and a drainage device. The main frame adopts a double-layer structure design, the inner layer is made of aluminum alloy material, the outer layer is made of a corrosion-resistant coating, and a flow guide groove is arranged between the two layers; the sliding assembly realizes waterproofing through a plurality of sealing cavities and O-shaped sealing rings; the sealing cover is designed in an arc shape and forms a double waterproof barrier in cooperation with elastic pressing strips; and the drainage device discharges liquid through a water collecting groove and a drainage pipe provided with a one-way valve. Through optimization of structure design and material selection, the waterproof performance is significantly improved, the problem of liquid intrusion under complex working conditions is solved, stable operation of equipment is ensured, maintenance cost is reduced, and the novel waterproof linear guide rail module structure is suitable for the demand of the industrial automation field.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical transmission and precision motion control technology, specifically a novel waterproof linear guide module structure. Background Technology

[0002] Linear guide modules are widely used in industrial automation, providing high-precision linear motion support for equipment. Their performance directly affects the overall operating efficiency and reliability of the equipment. However, existing linear guide modules have certain limitations in terms of waterproofing. For example, traditional designs often use basic sealing structures, which are insufficient to completely prevent liquid or dust intrusion under complex working conditions, potentially affecting the module's lifespan and operational stability. Furthermore, some waterproofing structures are complex in design, increasing the difficulty of manufacturing and maintenance.

[0003] A high-speed load-bearing optical axis linear module, disclosed in CN111255867B on October 11, 2022, achieves dual-axis application through optimized guide rail structure and improves the overall sealing of the slider. This design primarily addresses accuracy and lifespan issues in high-speed load scenarios, but its consideration for waterproofing is limited. Specifically, its sealing structure may be susceptible to moisture penetration in long-term high-humidity or splashing environments, thus affecting the module's stability and reliability.

[0004] A cleanroom-type linear motor module, with publication number CN119315793B and publication date March 25, 2025, improves the module's safety and lifespan by placing the guide structure on the outside of the motor base, thus avoiding the influence of operating temperature on the guide wheels. However, this design focuses on dustproofing and temperature adaptability, and its protection against liquid intrusion is relatively weak. Especially in applications requiring frequent cleaning or humid environments, its waterproof performance may not meet practical requirements.

[0005] The aforementioned problems indicate that there is still room for improvement in the waterproof performance of current linear guide modules on the market. Therefore, this utility model aims to provide a novel waterproof linear guide module structure to overcome the shortcomings of existing technologies and meet the needs of modern industry for high-waterproof linear guide modules. Summary of the Invention

[0006] This utility model relates to the field of linear guide module technology, specifically a novel waterproof linear guide module structure. The novel waterproof linear guide module structure includes a main frame, a sliding component, a sealing cover, and a drainage device. The sliding component is fixed to the internal track of the main frame via an embedded installation method. The sealing cover is fixed to the outer surface of the main frame by bolts, and an elastic sealing strip is provided between the sealing cover and the main frame to form a first waterproof barrier. The drainage device is installed at the bottom edge of the main frame via a slot structure to quickly drain any infiltrated liquid.

[0007] The main frame of this utility model adopts a double-layer structure design. The inner layer is made of high-strength aluminum alloy, and the outer layer is wrapped with a corrosion-resistant coating. A guide channel is provided between the two layers, extending along the length of the main frame to guide the liquid flow to the drainage device. The sliding component includes a slider and a rolling unit. The slider is precision-machined to form a multi-stage stepped sealing cavity. The rolling unit is nested inside the slider and is limited by end caps at both ends. The end caps and the slider are tightly connected by O-rings to prevent liquid from entering the slider.

[0008] The sealing cover features an arc-shaped cross-section with an angled top to facilitate liquid sliding down the surface without accumulation. The two side edges of the sealing cover are tightly fitted to the side walls of the main frame via elastic strips made of silicone, which offer excellent elasticity and wear resistance, maintaining stable sealing performance over long-term use. Furthermore, the bottom edge of the sealing cover has a raised structure that works in conjunction with the flow channels of the main frame to form a second waterproof barrier, further preventing liquid from entering the main frame.

[0009] The drainage system includes a water collection tank and a drain pipe. The water collection tank is fixed to the bottom edge of the main frame via a slot structure, and its opening faces the guide channel of the main frame to receive liquid flowing out from the guide channel. One end of the drain pipe is connected to the water collection tank, and the other end extends to the external environment. The drain pipe is equipped with a one-way valve, which is controlled to open and close by a spring mechanism to ensure that the liquid can only flow in one direction and prevent external liquid from flowing back into the main frame.

[0010] The sliding component of this invention adopts a modular design for connection with the main frame. A positioning pin is provided at the bottom of the slider, which matches the track groove of the main frame, allowing for precise positioning of the slider through pin insertion. A mounting hole is provided at the top of the slider for fixing external load equipment. The inner wall of the mounting hole is anodized to improve its corrosion resistance. The rolling unit consists of multiple balls separated by partitions made of engineering plastic, which have a low coefficient of friction and high wear resistance, effectively reducing wear during rolling.

[0011] In practical applications, when liquid comes into contact with the outer surface of the main frame, it is first blocked by the sealing cover and slides down its curved surface. Some liquid may enter the guide channel through the tiny gap between the sealing cover and the main frame. The guide channel directs the liquid to the collection tank, and the liquid is then discharged through the drain pipe, thus preventing liquid accumulation from damaging the module. The multi-stage stepped sealing cavity design of the sliding component, combined with the application of O-ring seals, effectively prevents liquid from intruding into the slider, ensuring the normal operation of the rolling unit.

[0012] This invention solves the problem of insufficient waterproofing performance of existing linear guide rail modules under complex working conditions through the synergistic effect of a double-layer structure design, an arc-shaped sealing cover, a flow guide groove, and a drainage device. The arc-shaped design of the sealing cover and the application of elastic pressure strips significantly improve the module's sealing performance while reducing maintenance costs. The combined use of the flow guide groove and drainage device not only quickly drains infiltrated liquid but also avoids the risk of liquid backflow. The modular design of the sliding components and the multi-stage sealing structure further enhance the module's reliability and service life.

[0013] The technical solution of this utility model, through optimized structural design and material selection, overcomes the shortcomings of existing technologies in terms of waterproof performance, meets the demand of the industrial automation field for high-waterproof linear guide modules, and provides a strong guarantee for the stable operation of equipment. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 for Figure 1 Enlarged schematic diagram of part A of the structure; Figure 3 This is a schematic diagram of the sliding component. Figure 4 This is a schematic diagram of the structure of an O-ring seal.

[0015] The attached figures are labeled as follows: 1. Main frame; 2. Sliding assembly; 3. Sealing cover; 4. Drainage device; 5. Guide channel; 6. Slider; 7. Rolling unit; 8. End cap; 9. O-ring seal; 10. Elastic pressure strip; 11. Water collection tank; 12. Drain pipe; 13. One-way valve; 14. Positioning pin; 15. Mounting hole. Detailed Implementation

[0016] This utility model provides a novel waterproof linear guide module structure, the specific implementation of which is as follows (in conjunction with the attached diagram). Figure 1 To be continued Figure 4 Please provide a detailed explanation. Figure 1The assembly relationship of the overall structure is shown, including the main frame 1, sliding assembly 2, sealing cover 3, and drainage device 4. The main frame 1, as the core supporting component, adopts a double-layer structure design. The inner layer is made of high-strength aluminum alloy, and the outer layer is coated with a corrosion-resistant coating. A flow guide channel 5 is provided between the two layers, extending along the length of the main frame 1 to guide liquid to the drainage device 4. The internal track of the main frame 1 is used to install the sliding assembly 2. The sliding assembly 2 is fixed in the track by an embedded installation method. A positioning pin 14 is provided at the bottom of the sliding assembly 2, which matches the positioning groove in the track of the main frame 1 to achieve precise positioning. The sealing cover 3 is fixed to the outer surface of the main frame 1 by bolts. An elastic sealing strip is provided between the sealing cover 3 and the main frame 1, forming the first waterproof barrier. Simultaneously, the raised structure at the bottom of the sealing cover 3 cooperates with the flow guide channel 5 of the main frame 1 to form the second waterproof barrier. The drainage device 4 is installed on the bottom edge of the main frame 1 through a slot structure. The opening of its water collection tank 11 faces the guide channel 5 to receive the liquid flowing out from the guide channel 5. One end of the drain pipe 12 is connected to the water collection tank 11, and the other end extends to the external environment. A one-way valve 13 is provided inside the drain pipe 12 to ensure that the liquid can only flow in one direction.

[0017] Further integration Figure 2 The double-layer structure design of the main frame 1 is described in detail. The inner layer of the main frame 1 is made of high-strength aluminum alloy, which has good mechanical strength and rigidity and can withstand large loads. The outer layer is coated with a corrosion-resistant coating made of polytetrafluoroethylene (PTFE), which has excellent chemical corrosion resistance and can be used for a long time in humid or corrosive environments. A flow guide channel 5 is provided between the inner and outer layers. The flow guide channel 5 has a U-shaped cross-section with a slightly inclined bottom to facilitate liquid flow. The flow guide channel 5 is 2 mm deep and 5 mm wide, and is continuously arranged along the length of the main frame 1. The two ends of the flow guide channel 5 are connected to the drainage devices 4 on both sides of the main frame 1 to ensure that the liquid can be discharged quickly. The design of the flow guide channel 5 not only guides the liquid to the drainage device 4, but also prevents the liquid from accumulating inside the main frame 1, thereby reducing the impact on the sliding component 2.

[0018] Combination Figure 3The specific structure of the sliding assembly 2 is described below. The sliding assembly 2 includes a slider 6 and a rolling unit 7. The slider 6 is precision-machined to form a multi-stage stepped sealing cavity, with three layers. Each sealing cavity has a height of 1 mm and a width of 3 mm. Adjacent sealing cavities have rounded transition corners to reduce stress concentration. The rolling unit 7 is nested inside the slider 6 and consists of multiple balls separated by partitions made of polyoxymethylene engineering plastic, which has a low coefficient of friction and high wear resistance, effectively reducing wear during rolling. The two ends of the rolling unit 7 are limited by end caps 8, which are tightly connected to the slider 6 via O-rings 9. The O-rings 9 are made of nitrile rubber, which has good elasticity and anti-aging properties, maintaining a stable sealing effect during long-term use. The top of the slider 6 has a mounting hole 15 with a diameter of 8 mm and a depth of 10 mm, used to fix external load equipment. The inner wall of the mounting hole 15 is anodized to improve its corrosion resistance. The bottom of the slider 6 is provided with a positioning pin 14. The positioning pin 14 has a diameter of 4 mm and a length of 6 mm. It matches the positioning groove in the track of the main frame 1. The precise positioning of the slider 6 is achieved by inserting the positioning pin 14.

[0019] Combination Figure 4 The specific structure of the sealing cover 3 is described below. The sealing cover 3 adopts an arc-shaped cross-section structure with a 15-degree inclined top, facilitating liquid sliding down the surface without accumulation. The two side edges of the sealing cover 3 are tightly fitted to the side walls of the main frame 1 via elastic strips 10. The elastic strips 10 are made of silicone, possessing good elasticity and wear resistance, ensuring stable sealing performance during long-term use. The bottom edge of the sealing cover 3 has a raised structure, 3 mm high and 5 mm wide, which cooperates with the guide groove 5 of the main frame 1 to form a second waterproof barrier. The sealing cover 3 is fixed to the outer surface of the main frame 1 by bolts of M6 specification with a bolt spacing of 100 mm to ensure a firm and reliable connection between the sealing cover 3 and the main frame 1.

[0020] The drainage device 4 includes a water collection tank 11 and a drain pipe 12. The water collection tank 11 is fixed to the bottom edge of the main frame 1 via a slot structure. The opening of the water collection tank 11 faces the guide channel 5, with an opening width of 8 mm and a depth of 10 mm, for receiving liquid flowing out from the guide channel 5. One end of the drain pipe 12 is connected to the water collection tank 11, and the other end extends to the external environment. The drain pipe 12 has a diameter of 12 mm and a length of 500 mm. A one-way valve 13 is installed inside the drain pipe 12. The one-way valve 13 is controlled to open and close by a spring mechanism with an elastic coefficient of 5 Newtons per millimeter, ensuring that the liquid can only flow in one direction and preventing external liquid from flowing back into the main frame 1. The water collection tank 11 and the drain pipe 12 are fixed by a threaded connection with a thread specification of G1 / 2. A sealing gasket is provided at the connection point. The sealing gasket is made of EPDM rubber, which has good sealing performance and aging resistance.

[0021] In practical applications, when liquid comes into contact with the outer surface of the main frame 1, it is first blocked by the sealing cover 3 and slides down its arc-shaped surface. Some liquid may enter the guide channel 5 through the tiny gap between the sealing cover 3 and the main frame 1. The guide channel 5 guides the liquid to the water collection tank 11, and the liquid is then discharged through the drain pipe 12, thus preventing liquid accumulation from damaging the module. The multi-stage stepped sealing cavity design of the sliding component 2, combined with the application of the O-ring seal 9, effectively prevents liquid from intruding into the slider 6, ensuring the normal operation of the rolling unit 7. When the slider 6 slides in the track of the main frame 1, the cooperation between the positioning pin 14 and the track groove ensures the precise positioning of the slider 6. The mounting hole 15 on the top of the slider 6 is used to fix the external load equipment, and the anodizing treatment of the mounting hole 15 improves its corrosion resistance. The balls in the rolling unit 7 are isolated by the separator, reducing friction and wear during the rolling process and extending the service life of the sliding component 2. The arc-shaped design of the sealing cover 3 and the application of the elastic pressure strip 10 significantly improve the sealing performance of the module while reducing maintenance costs. The combined use of the flow channel 5 and the drainage device 4 not only enables the rapid discharge of seepaged liquid but also avoids the risk of liquid backflow. The modular design and multi-stage sealing structure of the sliding component 2 further enhance the reliability and service life of the module.

[0022] To enable those skilled in the art to fully understand and implement this utility model, the specific implementation principles of this utility model are further explained below in conjunction with specific application scenarios.

[0023] In practical applications, when the linear guide module is installed in industrial environments with high humidity or frequent cleaning, liquid may come into contact with the surface of the main frame 1 from the outside. In this case, the sealing cover 3 first comes into play; its arc-shaped cross-section design allows the liquid to slide off at an inclined angle, preventing accumulation. Simultaneously, the elastic pressure strip 10 fits tightly against the side wall of the main frame 1, forming the first waterproof barrier. If a small amount of liquid enters through the tiny gap between the sealing cover 3 and the main frame 1, it will be guided to the guide channel 5. The U-shaped cross-section and slightly inclined bottom design of the guide channel 5 ensure that the liquid can quickly flow to the drainage devices 4 at both ends of the main frame 1, thereby preventing liquid accumulation inside the main frame 1.

[0024] Furthermore, after the liquid enters the guide channel 5, it flows into the collection tank 11. The opening of the collection tank 11 faces the guide channel 5 to ensure smooth liquid entry. Subsequently, the liquid is discharged to the external environment through the drain pipe 12. The one-way valve 13 inside the drain pipe 12 is controlled to open and close by a spring mechanism to ensure that the liquid can only flow in one direction, preventing external liquid from flowing back into the main frame 1. This process, through the synergistic effect of the guide channel 5, the collection tank 11, and the drain pipe 12, achieves the technical effect of rapid drainage and prevention of liquid backflow.

[0025] When the sliding assembly 2 runs in the track of the main frame 1, its multi-stage stepped sealing cavity design, combined with the application of O-ring seals 9, effectively prevents liquid from entering the interior of the slider 6. Specifically, the three-layer sealing cavity of the slider 6 progressively blocks liquid intrusion, and the transition rounded corner design between adjacent sealing cavities reduces stress concentration and improves the durability of the sealing cavity. The balls in the rolling unit 7 are isolated by separators, reducing friction and wear during rolling and extending the service life of the sliding assembly 2. The end cap 8 and the slider 6 are tightly connected by O-ring seals 9. The O-ring seals 9 are made of nitrile rubber, which has good elasticity and anti-aging properties, and can maintain a stable sealing effect during long-term use.

[0026] When slider 6 slides within the track of main frame 1, its bottom locating pin 14 mates with the track groove, ensuring precise positioning of slider 6. The mounting hole 15 at the top of slider 6 is used to fix external load equipment. The inner wall of mounting hole 15 is anodized, improving its corrosion resistance and adapting to humid or corrosive environments. The modular design of sliding assembly 2 facilitates installation and maintenance, while the multi-stage sealing structure further enhances the module's reliability and service life.

[0027] The raised structure at the bottom of the sealing cover 3 cooperates with the guide groove 5 of the main frame 1 to form a second waterproof barrier. This design significantly improves the sealing performance of the module by physically blocking and guiding the liquid. The sealing cover 3 is fixed to the outer surface of the main frame 1 by bolts with a bolt spacing of 100 mm to ensure a firm and reliable connection between the sealing cover 3 and the main frame 1. The elastic pressure strip 10 is made of silicone, which has good elasticity and wear resistance, and can maintain stable sealing performance during long-term use.

[0028] In summary, this invention solves the problem of insufficient waterproofing performance of existing linear guide rail modules under complex working conditions through the synergistic effect of a double-layer structure design, an arc-shaped sealing cover, a flow guide groove, and a drainage device. The arc-shaped design of the sealing cover and the application of elastic pressure strips significantly improve the sealing performance of the module while reducing maintenance costs. The combined use of the flow guide groove and drainage device not only quickly drains infiltrated liquid but also avoids the risk of liquid backflow. The modular design of the sliding components and the multi-stage sealing structure further enhance the reliability and service life of the module.

[0029] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A novel waterproof linear guide rail module structure, comprising a main frame (1), a sliding assembly (2), a sealing cover (3) and a drainage device (4), characterized in that, The sliding assembly (2) is fixed in the internal track of the main frame (1) by embedded installation, the sealing cover (3) is fixed on the outer surface of the main frame (1) by bolt connection, and the elastic sealing strip is arranged between the sealing cover (3) and the main frame (1), and the drainage device (4) is installed at the bottom edge of the main frame (1) by the clamping groove structure.

2. The waterproof linear guide rail module structure according to claim 1, characterized in that, The main frame (1) adopts a double-layer structure design, the inner layer is made of high-strength aluminum alloy material, the outer layer is wrapped with a corrosion-resistant coating, and the flow guide groove (5) is arranged between the two layers and extends along the length direction of the main frame (1).

3. The waterproof linear guide rail module structure according to claim 1, characterized in that, The sliding assembly (2) comprises a sliding block (6) and a rolling unit (7), the sliding block (6) is formed by precise machining to form a multi-stage stepped sealing cavity, the rolling unit (7) is nested in the sliding block (6) and is limited by the end cover (8) at both ends, and the end cover (8) and the sliding block (6) are tightly connected by the O-shaped sealing ring (9).

4. The waterproof linear guide rail module structure according to claim 1, characterized in that, The sealing cover (3) adopts an arc cross-section structure, the top of the sealing cover (3) is provided with an inclined angle, the two side edges of the sealing cover (3) are tightly combined with the side wall of the main frame (1) through the elastic pressing strip (10), the elastic pressing strip (10) is made of silica gel material, and the bottom edge of the sealing cover (3) is provided with a protruding structure matched with the flow guide groove (5) of the main frame (1).

5. The waterproof linear guide rail module structure according to claim 1, characterized in that, The drainage device (4) comprises a water collecting tank (11) and a drain pipe (12), the water collecting tank (11) is fixed at the bottom edge of the main frame (1) by the clamping groove structure, the opening direction of the water collecting tank (11) faces the flow guide groove (5) of the main frame (1), one end of the drain pipe (12) communicates with the water collecting tank (11), the other end extends to the external environment, and the inside of the drain pipe (12) is provided with a one-way valve (13).

6. The waterproof linear guide rail module structure according to claim 3, characterized in that, The bottom of the sliding block (6) is provided with a positioning pin (14) matched with the track groove of the main frame (1), and the top of the sliding block (6) is provided with a mounting hole (15), and the inner wall of the mounting hole (15) is subjected to anodic oxidation treatment.

7. The waterproof linear guide rail module structure according to claim 3, characterized in that, The rolling unit (7) is composed of a plurality of balls, the balls are isolated by a partition plate, and the material of the partition plate is engineering plastic.

8. The waterproof linear guide rail module structure according to claim 5, characterized in that, The one-way valve (13) is controlled to open and close by a spring mechanism.

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