Linear sliding rail

Abstract

The utility model relates to the field of mechanical transmission, in particular to a linear sliding rail. The utility model provides a linear sliding rail. According to the technical scheme, the linear sliding rail comprises a sliding block assembly and a guide rail. The sliding block assembly is embedded in the guide rail and is fixedly arranged, and the guide rail can slide relative to the sliding block assembly; the guide rail is provided with a rack arranged in the track direction of the guide rail. The linear sliding rail has the advantages that the transmission precision and stability are improved, the load capacity is enhanced, and the structural design is simplified.

Description

Technical Field

[0001] This utility model relates to the field of mechanical transmission, and in particular to a linear guide rail. Background Technology

[0002] A rack and pinion is a fundamental component of mechanical transmission, widely used in machine tools and other equipment. With the development of manufacturing, the requirements for transmission accuracy in equipment are becoming increasingly stringent, meaning higher precision requirements are placed on racks and pinions, as well as greater stability during operation. As a crucial part of linear transmission, the installation position and stability of the rack and pinion directly affect the performance of the entire system.

[0003] In traditional linear guideway designs, the rack is typically mounted on the slider. This design has some inherent drawbacks. First, the slider, as a moving component, is limited in size and load-bearing capacity, failing to provide sufficient installation space and stable support for the rack. Second, the slider may experience minor vibrations and misalignments during movement, which are directly transmitted to the rack, affecting the precise engagement between the rack and the meshing gear, thus reducing the accuracy and smoothness of the entire transmission system.

[0004] Furthermore, mounting a rack on the slider increases the slider's weight and complexity, affecting not only its motion performance but also its manufacturing and maintenance difficulties. Simultaneously, the slider's load-bearing capacity decreases as it bears the additional weight of the rack, limiting the overall application range and load-bearing capacity of the linear guide system. In applications requiring high precision and stability, such as precision machine tools and automated production lines, traditional rack-and-pinion mounting methods are no longer sufficient to meet the ever-increasing performance demands. Therefore, developing a linear guide design that provides higher stability and load-bearing capacity has become a pressing technical challenge in the field of mechanical transmission. Summary of the Invention

[0005] To address the aforementioned problems, the present invention aims to provide a linear guide rail that offers advantages such as improved transmission accuracy and stability, enhanced load capacity, and simplified structural design.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] This application provides a linear slide rail, the technical solution of which is as follows: it includes a slider assembly and a guide rail; the slider assembly is embedded in the guide rail and fixedly installed, and the guide rail can slide relative to the slider assembly; the guide rail is provided with a rack arranged along its track direction.

[0008] Furthermore, this application also proposes that a groove is formed in the concave end face of one side of the guide rail, and the slider assembly is embedded in the groove of the guide rail; the rack is disposed on the side wall of the guide rail.

[0009] Furthermore, this application also proposes that an installation area for a fixed carrier is constructed on the other end face of the guide rail.

[0010] Furthermore, this application also proposes that ball bearings are embedded on both sides of the slider assembly, and the slider assembly and the slide rail slide relative to each other through the ball bearings.

[0011] Furthermore, this application also proposes that the slider assembly has an annular raceway formed inside, and the annular raceway forms an edge raceway section at least at the edge of the slider assembly and the inner wall of the groove of the track; the annular raceway is filled with balls and the balls in the edge raceway section are at least partially exposed and in contact with the inner wall of the groove of the track; when the slider assembly slides relative to the guide rail, the balls roll in annularly along the annular raceway.

[0012] Furthermore, this application also proposes that the edge raceway segment includes a semi-circular raceway located at the edge of the slider assembly and a semi-circular raceway formed by the inward indentation of the inner wall of the groove of the track; the two semi-circular raceways are joined together to form the edge raceway segment.

[0013] Furthermore, this application also proposes that the slider assembly includes a slider body and end caps disposed on both sides of the slider body; the slider body has a straight raceway section with an annular raceway inside, and the end caps on both sides have an arc-shaped raceway section connecting the straight raceway section and the edge raceway section inside.

[0014] Furthermore, this application also proposes that the end cap is provided with a stop portion extending into the semi-circular raceway inside the inner wall of the track groove; the end of the arc-shaped raceway segment that connects with the edge raceway segment is formed in the stop portion.

[0015] Furthermore, this application also proposes that the end cap includes an upper cover plate and a lower cover plate, and the arc-shaped raceway section is formed by connecting arc-shaped raceway grooves respectively formed on the upper cover plate and the lower cover plate.

[0016] Furthermore, this application also proposes that a dovetail groove is constructed on the end of the slider body, and dovetail protrusions are respectively constructed on the upper and lower cover plates of the end cap; the upper and lower cover plates can be pushed into the dovetail groove based on the dovetail protrusions and thus snapped onto the end of the slider body.

[0017] As described above, this application provides a linear guide rail, including a slider assembly and a guide rail. The slider assembly is embedded in and fixedly mounted in the guide rail, and the guide rail is slidable relative to the slider assembly. A rack is provided on the guide rail, arranged along its track direction. By setting the rack on the guide rail, rather than on the traditional slider, the problems of rack installation space and stability are solved, improving transmission accuracy and stability, enhancing load capacity, and simplifying structural design. Attached Figure Description

[0018] Figure 1 This is a three-dimensional top view of a linear slide rail provided in this application.

[0019] Figure 2 This is a three-dimensional schematic diagram of the bottom surface of a linear slide rail provided in this application.

[0020] Figure 3 This is a cross-sectional schematic diagram of a linear slide rail provided in this application.

[0021] Figure 4 This is a schematic diagram of the slider assembly.

[0022] Figure 5 This is a schematic diagram of the partial separation state of the slider assembly. Detailed Implementation

[0023] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0024] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.

[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0028] like Figures 1-5As shown, this embodiment proposes a linear slide rail, including a slider assembly 1 and a guide rail 2. The slider assembly 1 is embedded in and fixedly installed in the guide rail 2, and the guide rail 2 can slide relative to the slider assembly 1. A rack 3 is provided on the guide rail 2 along its track direction. The rack 3 is arranged along the track direction of the guide rail 2, which allows the length of the rack 3 to be adjusted according to the length of the guide rail 2, thereby meeting the needs of different application scenarios. Furthermore, the slider assembly 1 is embedded in and fixedly installed in the guide rail 2, which allows the guide rail 2 to slide relative to the slider assembly 1, thereby improving the stability and load capacity of the slide rail. As a preferred embodiment, the rack 3 can be fixed to the guide rail 2 by bolts, welding, or integral molding to ensure a firm connection between them. Furthermore, the tooth profile of the rack 3 can be straight or helical to adapt to different transmission requirements. Specifically, straight teeth are suitable for high-precision transmission, while helical teeth are suitable for high-load transmission. In addition, the material of the rack 3 can be high-strength alloy steel or stainless steel to improve its wear resistance and service life. The technical solution of this application sets the rack 3 on the guide rail 2 instead of the traditional slider, and the length of the guide rail 2 meets the length requirements of the rack 3. Furthermore, the slider assembly 1 and the guide rail 2 adopt the form of a linear slide rail, thereby improving the stability and load capacity of the slide rail. The slider assembly 1 is embedded in and fixedly set in the guide rail 2, allowing the guide rail 2 to slide relative to the slider assembly 1. This design makes the slide rail more stable during movement and able to withstand greater loads. The rack 3 is arranged along the track direction of the guide rail 2, further enhancing the transmission accuracy and running smoothness of the slide rail. Compared with the prior art, the technical solution of this application significantly improves the stability and load capacity of the slide rail by optimizing the arrangement of the rack 3 and the connection method between the slider assembly 1 and the guide rail 2, solving the technical problem of insufficient sliding stability and load capacity between the slider assembly 1 and the guide rail 2 in linear slide rails.

[0029] In a specific implementation, a groove 20 is formed recessed on one end face of the guide rail 2, and the slider assembly 1 is embedded in the groove 20 of the guide rail 2; the rack 3 is disposed on the side wall of the guide rail 2. Specifically, the groove 20 can be formed by machining, such as milling or grinding, on one end face of the guide rail 2 to form a recessed groove 20 structure. The slider assembly 1 can be embedded into the groove 20 through a precision assembly process to ensure a tight fit between it and the guide rail 2. The rack 3 can be disposed by drilling or threading on the side wall of the guide rail 2, and then fixing the rack 3 to the side wall of the guide rail 2 by bolts or welding. As a preferred embodiment, the depth and width of the groove 20 can be designed according to the size and load requirements of the slider assembly 1 to ensure stable sliding of the slider assembly 1 in the groove 20. The tooth profile and spacing of the rack 3 can be designed according to the transmission accuracy requirements to improve the smoothness and accuracy of the transmission. Therefore, by forming a groove 20 recessed on one end face of the guide rail 2 and embedding the slider assembly 1 in the groove 20, the connection stability between the slider assembly 1 and the guide rail 2 can be enhanced. Simultaneously, by placing the rack 3 on the side wall of the guide rail 2, the connection between the rack 3 and the guide rail 2 becomes more stable, thereby improving the load capacity of the entire linear slide rail. This design not only enhances the stability of the structure but also improves the smoothness of the slide rail during operation, meeting the requirements of high-precision transmission. Compared with the prior art, the technical solution of this application significantly improves the stability and load capacity of the linear slide rail by optimizing the connection method between the guide rail 2 and the slider assembly 1, as well as the placement of the rack 3. This improvement not only solves the problem of insufficient stability of the slider assembly 1 in the prior art but also improves the smoothness of the slide rail under high load conditions, possessing significant technical advantages.

[0030] Furthermore, a mounting area 21 for fixing a carrier is constructed on the other end face of the guide rail 2. Specifically, this mounting area 21 can be achieved by machining threaded holes, slots, or other forms of connection structures on the other end face of the guide rail 2. For example, threaded holes can be used to fix the carrier to the guide rail 2 with bolts, while slots can be used to insert and fix the protruding part of the carrier. As a preferred embodiment, the mounting area 21 can also be designed to be adjustable to accommodate carriers of different sizes or shapes. This technical solution solves the technical problem of constructing a mounting area 21 for fixing a carrier in a linear guide rail by constructing a mounting area 21 for fixing a carrier on the other end face of the guide rail 2. This technical feature allows the guide rail 2 to not only provide a sliding function but also provide a mounting area 21 for fixing a carrier on the other end face, thereby enhancing the functionality and practicality of the guide rail 2. Through this design, the guide rail 2 can better adapt to different application scenarios and meet more diverse needs. Compared with existing technologies, this solution not only improves the load capacity and stability of the guide rail 2, but also simplifies the installation process of the carrier, reducing installation time and cost.

[0031] In such Figures 3-5 In the illustrated embodiment, ball bearings 11 are embedded on both sides of the slider assembly 1, and the slider assembly 1 slides relative to the guide rail via the ball bearings 11. Through this technical means, the contact between the slider assembly 1 and the guide rail 2 is changed from sliding friction to rolling friction, thereby significantly reducing friction and improving the smoothness of sliding. Simultaneously, the embedding of the ball bearings 11 increases the contact area, thus improving the load capacity. Through the relative sliding of the ball bearings 11, the movement between the slider assembly 1 and the guide rail 2 is smoother, reducing wear and extending service life. Compared with the prior art, the technical solution of this application not only improves the smoothness of sliding and load capacity, but also reduces energy loss and improves transmission efficiency through the rolling of the ball bearings 11.

[0032] In a specific implementation, an annular raceway 12 is formed inside the slider assembly 1. The annular raceway 12 forms an edge raceway section 121 at least at the edge of the slider assembly 1 and the inner wall of the groove 20 of the track. The annular raceway 12 is filled with balls 11, and at least part of the balls 11 in the edge raceway section 121 are exposed and in contact with the inner wall of the groove 20 of the track. When the slider assembly 1 slides relative to the guide rail 2, the balls 11 roll in annular motion along the annular raceway 12. Specifically, the design of the annular raceway 12 allows the balls 11 to contact the inner wall of the groove 20 during rolling, thereby increasing the contact area between the slider assembly 1 and the guide rail 2. This increased contact area not only improves the smoothness of sliding but also reduces friction, making the slider assembly 1 move more smoothly. Furthermore, the distribution and rolling pattern of the balls 11 enable the slider assembly 1 to withstand a greater load, enhancing its load-bearing capacity. For example, the annular raceway 12 can be designed so that multiple balls 11 simultaneously contact the inner wall of the groove 20, thereby distributing the load and avoiding localized stress concentration. Therefore, the technical solution of this application, through the design of the annular raceway 12 and the edge raceway section 121, effectively solves the technical problems of sliding smoothness and load capacity between the slider assembly 1 and the guide rail 2. Compared with the prior art, this solution not only improves the smoothness of sliding but also enhances the load capacity of the slider assembly 1, enabling it to adapt to more complex motion requirements.

[0033] Further as Figure 1As shown in Figures 3 and 4, the edge raceway section 121 includes a semi-circular raceway 121a located at the edge of the slider assembly 1 and a semi-circular raceway 121a formed by the inward indentation of the inner wall of the groove 20 of the track; the two semi-circular raceways 121a are joined together to form the edge raceway section 121. Specifically, the semi-circular raceway 121a at the edge of the slider assembly 1 can be achieved by machining a semi-circular groove on the edge of the slider assembly 1, while the semi-circular raceway 121a formed by the inward indentation of the inner wall of the groove 20 of the track can be achieved by machining a corresponding semi-circular groove on the inner wall of the groove 20 of the guide rail 2. When the two semi-circular raceways 121a are joined, through precise machining and assembly, the semi-circular grooves of the two can be perfectly aligned, thereby forming a complete raceway structure. In addition, the radius and depth of the semi-circular raceway 121a can be adjusted according to actual needs to adapt to different load and sliding speed requirements. As a preferred embodiment, the surface of the semi-circular raceway 121a can be hardened to improve its wear resistance and service life. Meanwhile, the surface roughness of the raceway can be controlled to a low level through precision machining to reduce the frictional resistance of the balls 11 during rolling. In this design, the edge raceway section 121 is designed to connect the semi-circular raceway 121a on the edge of the slider assembly 1 with the semi-circular raceway 121a on the inner wall of the guide rail 2 groove 20, forming a complete raceway structure. This design allows the balls 11 to roll more smoothly during sliding, reducing friction and vibration, thereby improving the smoothness of sliding and load capacity. Through this structure, the contact area between the slider assembly 1 and the guide rail 2 is increased and more evenly distributed, further enhancing the stability and load capacity of the system. Compared with the prior art, the technical solution of this application significantly improves the smoothness of sliding and load capacity between the slider assembly 1 and the guide rail 2 by optimizing the raceway structure, solving the technical problems existing in the prior art.

[0034] like Figure 4 and 5As shown, the slider assembly 1 includes a slider body 13 and end caps 14 disposed on both sides of the slider body 13. The slider body 13 has a straight raceway section 122 of an annular raceway 12 inside, and the end caps 14 have arc-shaped raceway sections 123 connecting the straight raceway section 122 and the edge raceway section 121 inside. Specifically, the straight raceway section 122 inside the slider body 13 and the arc-shaped raceway section 123 inside the end caps 14 together form a complete annular raceway 12, ensuring smooth rolling of the ball 11 between the slider assembly 1 and the guide rail 2. The end caps 14 not only enhance the structural stability of the slider assembly 1, but also optimize the movement path of the ball 11 through the connection between the arc-shaped raceway section 123 and the straight raceway section 122, thereby improving the sliding smoothness and load capacity between the slider assembly 1 and the guide rail 2. This design, through precise raceway layout and the auxiliary function of the end caps 14, effectively solves the problems of jamming and insufficient load that may occur during the sliding process of traditional slider assemblies 1. Therefore, the technical solution of this application, through the coordinated design of the slider body 13 and the end cap 14, achieves smooth rolling of the ball 11 within the annular raceway 12, significantly improving the sliding stability and load capacity between the slider assembly 1 and the guide rail 2. Compared with the prior art, this solution effectively solves the problems of jamming and insufficient load that may occur in the sliding process of the traditional slider assembly 1 by optimizing the raceway layout and the end cap 14 structure, and has high practicality and innovation.

[0035] In the specific design, the end cap 14 is provided with a stop extending into the semi-circular raceway 121a of the inner wall of the track groove 20; the end of the arc-shaped raceway section 123, which abuts against the edge raceway section 121, is formed in the stop. Specifically, the stop can be designed as a protruding structure with a certain thickness, the shape of which matches the semi-circular raceway 121a of the inner wall of the track groove 20 to ensure that the stop can fit tightly against the inner wall of the raceway. The material of the stop can be a metal or alloy with high wear resistance to enhance its service life. The end of the arc-shaped raceway section 123 is formed in the stop, which can be achieved by machining a groove inside the stop that matches the arc-shaped raceway section 123. This design not only ensures that the ball 11 will not detach from the raceway during rolling, but also improves the guidance and stability of the ball 11. Thus, the technical solution of this application effectively solves the stability problem that may occur in the rolling process of the ball 11 by setting the stop. The stop not only prevents the balls 11 from detaching from the raceway, but also further enhances the guidance and stability of the balls 11 by engaging with the end of the arc-shaped raceway section 123. This design allows the balls 11 to maintain a stable trajectory during rolling, thereby improving the smoothness and accuracy of the entire linear guide rail. Compared with the prior art, the technical solution of this application is more structurally reasonable and can significantly improve the performance and service life of the linear guide rail.

[0036] Further as Figure 5As shown, the end cap 14 includes an upper cover plate 141 and a lower cover plate 142. The arc-shaped raceway section 123 is formed by connecting arc-shaped raceway grooves respectively formed on the upper cover plate 141 and the lower cover plate 142. Specifically, the arc-shaped raceway grooves on the upper cover plate 141 and the lower cover plate 142 can be precision machined to ensure that the arc-shaped raceway section 123 after connection has high precision and consistency. Therefore, this application designs the end cap 14 to include an upper cover plate 141 and a lower cover plate 142, and the arc-shaped raceway section 123 is formed by connecting arc-shaped raceway grooves 144 respectively formed on the upper cover plate 141 and the lower cover plate 142. This design makes the connection between the end cap 14 and the slider body 13 more stable. Furthermore, this application proposes that a dovetail groove is constructed on the end of the slider body 13, and dovetail protrusions are respectively constructed on the upper cover plate 141 and the lower cover plate 142 of the end cap 14; the upper cover plate 141 and the lower cover plate 142 can be pushed into the dovetail groove based on the dovetail protrusions to engage with the end of the slider body 13. The dovetail groove 131 is constructed on the end of the slider body 13, and dovetail protrusions 143 are respectively constructed on the upper cover plate 141 and the lower cover plate 142 of the end cap 14. This design of the dovetail groove 131 and the dovetail protrusions 143 increases the ease of installation between the end cap 14 and the slider body 13, and further enhances the connection strength between the end cap 14 and the slider body 13. Specifically, the dovetail groove 131 is a groove with a specific shape, usually trapezoidal or inverted trapezoidal, with its two side walls inclined inwards, forming a shape similar to a dovetail. The dovetail protrusion 143 is a raised structure that matches the dovetail groove 131, and its shape complements the groove shape of the dovetail groove 131. By pushing the dovetail protrusion 143 into the dovetail groove 131, a stable connection can be achieved between the upper cover plate 141 and the lower cover plate 142 and the slider body 13. As a preferred embodiment, the size and shape of the dovetail groove 131 and the dovetail protrusion 143 can be adjusted according to actual needs to ensure the tightness and stability of the connection. In addition, the material of the dovetail groove 131 and the dovetail protrusion 143 can also be selected according to the usage environment. For example, in high-temperature or corrosive environments, high-temperature resistant or corrosion-resistant materials can be selected. Thus, this technical solution, through the cooperation of the dovetail groove 131 and the dovetail protrusion 143, achieves a stable connection between the upper cover plate 141 and the lower cover plate 142 and the slider body 13, thereby solving the technical problem of unstable connection between the slider body 13 and the end cap 14. Compared with the prior art, this solution not only improves the stability of the connection but also simplifies the installation process and enhances the reliability of the overall structure. Specifically, the design of the dovetail groove 131 and the dovetail protrusion 143 allows the upper cover plate 141 and the lower cover plate 142 to be quickly and securely snapped onto the slider body 13, avoiding the loosening or detachment problems that may occur in traditional connection methods. In addition, this design reduces the tools and steps required during installation, improving installation efficiency.

[0037] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0038] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.

Claims

1. A linear slide rail, comprising a slider assembly (1) and a guide rail (2); the slider assembly (1) is embedded in and fixedly disposed in the guide rail (2), and the guide rail (2) is slidable relative to the slider assembly (1); characterized in that: The guide rail (2) is provided with a rack (3) arranged along its track direction.

2. The linear guide rail according to claim 1, characterized in that: The guide rail (2) has a groove (20) formed in the indentation of one end face, and the slider assembly (1) is embedded in the groove (20) of the guide rail (2); the rack (3) is set on the side wall of the guide rail (2).

3. A linear guide rail according to claim 2, characterized in that: An installation area (21) for fixing the carrier is constructed on the other end face of the guide rail (2).

4. A linear guide rail according to claim 2, characterized in that: The slider assembly (1) is fitted with balls (11) on both sides, and the slider assembly (1) slides relative to the slide rail through the balls (11).

5. A linear guide rail according to claim 4, characterized in that: The slider assembly (1) has an annular raceway (12) inside. The annular raceway (12) forms an edge raceway section (121) at least at the edge of the slider assembly (1) and the inner wall of the groove (20) of the track. The annular raceway (12) is filled with balls (11) and the balls (11) in the edge raceway section (121) are at least partially exposed and in contact with the inner wall of the groove (20) of the track. When the slider assembly (1) slides relative to the guide rail (2), the balls (11) roll in annularly along the annular raceway (12).

6. A linear guide rail according to claim 5, characterized in that: The edge raceway section (121) includes a semi-circular raceway (121a) located at the edge of the slider assembly (1) and a semi-circular raceway (121a) formed by the inward indentation of the inner wall of the groove (20) of the track; the two semi-circular raceways (121a) are joined together to form the edge raceway section (121).

7. A linear guide rail according to claim 6, characterized in that: The slider assembly (1) includes a slider body (13) and end caps (14) disposed on both sides of the slider body (13); the slider body (13) is provided with a straight raceway section (122) of an annular raceway (12) inside, and the end caps (14) on both sides are provided with an arc-shaped raceway section (123) connecting the straight raceway section (122) and the edge raceway section (121).

8. A linear guide rail according to claim 7, characterized in that: The end cap (14) is provided with a stop in a semi-circular raceway (121a) that extends into the inner wall of the track groove (20); the end of the arc-shaped raceway section (123) that connects with the edge raceway section (121) is formed in the stop.

9. A linear guide rail according to claim 7, characterized in that: The end cap (14) includes an upper cover plate (141) and a lower cover plate (142), and the arc-shaped raceway section (123) is formed by connecting arc-shaped raceway grooves (144) respectively formed on the upper cover plate (141) and the lower cover plate (142).

10. A linear guide rail according to claim 9, characterized in that: The slider body (13) has a dovetail groove (131) at its end, and the upper cover plate (141) and lower cover plate (142) of the end cap (14) have dovetail protrusions (143) respectively. The upper cover plate (141) and lower cover plate (142) can be pushed into the dovetail groove (131) based on the dovetail protrusions (143) and thus be engaged with the end of the slider body (13).

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