Linear guide rail facilitating roller pre-pressing

Abstract

The application relates to a linear guide rail facilitating roller pre-pressing, which comprises a guide rail and a slider moving along the length direction of the guide rail, and the slider is internally connected with a retainer on the left and right sides, and each side retainer is matched with the slider to form a rolling track for the circulation rotation of the roller, wherein, on the left and right side walls of the inner part of the slider, the slider matched with the retainer forms an outer rolling track for the activity of the roller, and the roller is abutted by the slider and the guide rail in the outer rolling track, so that when the slider drives the roller to move, the roller always maintains a preset pre-tightening force, the size of the rolling track on the slider, the size of the roller and the distance between the guide rail and the rolling track are accurately controlled, the roller always maintains a uniform pre-tightening force in the outer rolling track, thereby reducing the vibration and deviation of the slider in the moving process, and the precision and stability of the system are improved.

Description

Technical Field

[0001] This invention relates to the field of slider technology, and in particular to a linear guide rail that facilitates roller preloading. Background Technology

[0002] Linear guides, as an important transmission device, are widely used in various mechanical equipment, such as CNC machine tools and industrial robots. The main function of linear guides is to provide precise linear motion, ensuring that mechanical parts can move smoothly and accurately along a predetermined path. However, with the development of industrial technology and the continuous improvement of application requirements, traditional linear guides have gradually shown their shortcomings in some aspects.

[0003] Especially in applications with large-size sliders and long strokes, existing linear guides face the following main problems: 1. Due to the large size of the slider and the long stroke of the raceway, the fit between the roller, slider, and guide rail becomes complex. If the fit between the roller size, the raceway size on the slider, and the distance between the guide rail and the track is not proper, it is easy to cause uneven roller preload. This uneven preload will cause the slider to vibrate or deviate during movement, thus affecting the accuracy and stability of the entire system; 2. Large-size sliders usually need to withstand large loads, but traditional single external raceway designs often cannot meet the requirements of high load capacity. This not only limits the working range of the equipment, but may also cause premature wear of the slider, shortening its service life; 3. The direct contact between the roller, slider, and guide rail will generate large friction, especially in high-speed or high-frequency movements. Long-term friction will cause wear on the surfaces of the roller and guide rail, increasing maintenance costs and reducing the operating efficiency of the system. Summary of the Invention

[0004] The present invention aims to solve the problems existing in the prior art by providing a linear guide rail that facilitates roller preloading and ensures that the rollers achieve a suitable preload between the slider and the guide rail.

[0005] The technical solution adopted by this invention to solve its technical problem is as follows: This linear guide rail, which facilitates roller preloading, includes: a guide rail and a slider that moves along the length of the guide rail. The slider has retainers connected to its left and right sides respectively. Each retainer cooperates with the slider to form a raceway for the roller to rotate cyclically.

[0006] On the inner left and right side walls of the slider, the slider and the cage form an outer raceway for the movement of the roller. The roller is abutted against each other by the slider and the guide rail in the outer raceway to ensure that the roller always maintains a preset preload when the slider drives the roller to move.

[0007] Preferably, a flexible guide sleeve for mounting rollers is slidably connected in the raceway, and the flexible guide sleeve drives the rollers to move on the outer raceway.

[0008] Preferably, the guide rail has inwardly recessed guide grooves on both sides, the slider has limit blocks on the left and right sides inside, and the retainer has a central bracket for fixing the flexible guide sleeve. The central bracket is installed on the limit blocks and slidably connected to the guide grooves.

[0009] Preferably, the slider has two outer raceways on each side, and the two outer raceway holes on the same side are mirrored along the central support on the cage.

[0010] Preferably, guide grooves are formed on the left and right sides of the outer raceway, and guide blocks are provided on both sides of the flexible guide sleeve, with the guide blocks on both sides slidably connected to the guide grooves on the same side.

[0011] Preferably, the guide groove has guide portions on both sides, the guide portions are inclined to both sides along the guide groove, the limiting block is provided with a mounting portion, and the roller is interference-fitted with the mounting portion and the guide portion on the outer raceway.

[0012] Preferably, the guide portion is provided with a first guide surface, and the mounting portion is provided with a second guide surface, wherein the first guide surface and the second guide surface are arranged parallel to each other.

[0013] Preferably, the slider includes a slider body and end caps located at both ends of the slider body. The slider body has inner raceway holes on the left and right sides for the movement of the rollers. The end caps have detachable inner circulation end caps on their inner sides. The inner circulation end caps, together with the inner raceway, the cage, and the outer raceway, form a complete raceway for the flexible guide sleeve to rotate cyclically.

[0014] Preferably, the flexible guide sleeve is provided with a plurality of limiting members evenly along its length, and the two sides of the limiting members are respectively connected to the guide blocks on both sides, and adjacent limiting members form a groove for limiting the roller.

[0015] Preferably, the limiting member includes a first locking part and a second locking part located on the left and right sides of the first locking part and connected to the corresponding side guide block. The front and rear sides of the first locking part and the second locking part are provided with arc-shaped surfaces that are inclined from one end to the other end, wherein the orientation of the first locking part is opposite to the orientation of the second locking parts on the left and right sides.

[0016] The present invention has the following beneficial effects:

[0017] 1. By precisely controlling the raceway dimensions, roller dimensions, and the distance between the guide rails on the slider, the rollers are ensured to maintain a uniform preload in the outer raceway, thereby reducing the vibration and offset of the slider during movement and improving the accuracy and stability of the system.

[0018] 2. The design of the guide parts on both sides of the guide groove and the mounting parts on the limiting block make the rollers interference fit with the mounting parts and guide parts on the outer raceway, which further enhances the stability and consistency of the system operation. The design of the limiting parts on the flexible guide sleeve, including the arc-shaped surfaces of the first and second locking parts and their opposite orientation, helps the rollers to be correctly arranged in the flexible guide sleeve, improving positioning accuracy and stability.

[0019] 3. The slider has two outer raceways on each side, and the two outer raceway holes on the same side are mirrored along the middle support on the cage. This double outer raceway design increases the bearing area of ​​the slider and improves the load-bearing capacity of the system, enabling it to better cope with large-size sliders and high-load applications. In addition, the design of the flexible guide sleeve reduces the direct contact between the rollers and the slider and guide rail, reduces friction, effectively reduces wear on the roller and guide rail surfaces, extends the service life of the system, and improves operating efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a linear guide rail that is easy to preload with rollers;

[0021] Figure 2 This is a cross-sectional view of a linear guide rail that facilitates roller preloading;

[0022] Figure 3 An exploded view of a linear guide rail that facilitates roller preloading;

[0023] Figure 4 This is a schematic diagram of the flexible guide sleeve.

[0024] Figure 5 for Figure 4 A magnified view of a section at point A in the middle;

[0025] Figure 6 This is a schematic diagram of the guide rail structure;

[0026] Figure 7 This is a structural diagram of the guide channel and the central support.

[0027] Figure 8 This is a schematic diagram of the outer raceway in the slider;

[0028] Figure 9 This is a schematic diagram of the limiting block and cage in the slider.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Guide rail; 100. Guide groove; 101. Guide section; 102. First guide surface;

[0031] 2. Slider; 20. Cage; 21. Slider body; 22. End cap; 200. Outer raceway; 201. Flexible guide sleeve; 202. Limiting block; 203. Middle support; 204. Guide groove; 205. Guide block; 206. Second guide surface; 207. Inner raceway hole; 208. Inner circulation end cap; 209. Limiting component; 210. First locking part; 211. Second locking part; 212. Roller; 213. Mounting part. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings:

[0033] See attached document Figures 1 to 9 As shown: A linear guide rail for easy roller preloading includes: a guide rail 1 and a slider 2 that moves along the length of the guide rail 1. The left and right sides of the slider 2 are respectively connected to retainers 20. Each retainer 20 cooperates with the slider 2 to form a raceway for the roller 212 to rotate cyclically. On the left and right side walls inside the slider 2, the slider 2 cooperates with the retainers 20 to form an outer raceway 200 for the movement of the roller 212. The roller 212 is abutted against each other by the slider 2 and the guide rail 1 in the outer raceway 200 to ensure that the roller 212 always maintains a preset preload when the slider 2 drives the roller 212 to move.

[0034] In this embodiment, the guide rail 1 serves as a supporting base, providing a straight path. Cages 20 are connected to the left and right sides of the slider 2, respectively. The cages 20 and the slider 2 cooperate to form a raceway for the roller 212 to rotate cyclically. On the left and right side walls inside the slider 2, the slider 2 and the cages 20 together form an outer raceway 200 for the movement of the roller 212. The roller 212 is abutted against each other by the slider 2 and the guide rail 1 in the outer raceway 200, ensuring that the roller 212 always maintains a preset preload when the slider 2 moves it. By precisely controlling the raceway dimensions on the slider 2, the roller 212 dimensions, and the distance between the guide rail 1 and the raceway, a uniform preload is achieved, thereby reducing vibration and offset, and improving the system's accuracy and stability. This design reduces wear between the roller 212 and the slider 2 and the guide rail 1, extending the system's service life. It is suitable for applications with large-size sliders 2 and long strokes, meeting the requirements of high precision and high load-bearing capacity.

[0035] Preferably, such as Figure 2 , Figure 4 and Figure 5 As shown, a flexible guide sleeve 201 for mounting roller 212 is slidably connected in the raceway, and the flexible guide sleeve 201 drives the roller 212 to move on the outer raceway 200.

[0036] The flexible guide sleeve 201 is made of a wear-resistant and elastic material. Its internal design is used to fix the roller 212. The flexible guide sleeve 201 reduces the direct contact between the roller 212 and the slider 2 and the guide rail 1, reduces friction, reduces wear, and improves the operating efficiency and accuracy of the system. By precisely controlling the preload, the flexible guide sleeve 201 ensures that the roller 212 maintains uniform pressure during movement, reducing vibration and offset.

[0037] Furthermore, such as Figure 2 , Figure 6 , Figure 7 , Figure 8 and Figure 9 As shown, the guide rail 1 has inwardly recessed guide grooves 100 on both sides, the slider 2 has limit blocks 202 on the left and right sides inside, and the retainer 20 has a central bracket 203 for fixing the flexible guide sleeve 201. The central bracket 203 is installed on the limit block 202 and is slidably connected to the guide groove 100.

[0038] The guide rail 1 has inwardly recessed guide grooves 100 on both sides to provide guidance and support for the slider 2. Limiting blocks 202 are provided on the left and right sides inside the slider 2 to restrict the lateral movement of the slider 2 and provide a mounting base. The retainer 20 has a central bracket 203 for fixing the flexible guide sleeve 201. The bracket is installed on the limiting block 202 and is slidably connected to the guide groove 100 to ensure that the flexible guide sleeve 201 is stable in position inside the slider 2 and can move smoothly. This design improves the guiding accuracy and stability of the system, reduces friction and wear, and extends the service life.

[0039] Furthermore, such as Figure 6 and Figure 7 As shown, each side of the slider 2 has two outer raceways 200, and the holes of the two outer raceways 200 on the same side are mirrored along the middle support 203 on the retainer 20.

[0040] The slider 2 has two outer raceways 200 on each side. The holes of the two outer raceways 200 on the same side are arranged in a mirror symmetrical manner along the middle support 203 on the cage 20. The double outer raceway 200 design increases the contact area between the slider 2 and the guide rail 1, improves the load-bearing capacity and stability of the system, and the symmetrical arrangement ensures that the rollers 212 are evenly distributed inside the slider 2, reduces offset and vibration, optimizes the preload distribution, and thus improves the overall performance and accuracy of the system.

[0041] Furthermore, such as Figure 2 , Figure 4 , Figure 5 and Figure 7As shown, guide grooves 204 are formed on the left and right sides of the outer raceway 200, and guide blocks 205 are provided on both sides of the flexible guide sleeve 201. The guide blocks 205 on both sides are slidably connected to the guide grooves 204 on the same side.

[0042] Guide grooves 204 are formed on the left and right sides of the outer raceway 200, and guide blocks 205 are provided on both sides of the flexible guide sleeve 201. The guide blocks 205 on both sides are slidably connected to the guide grooves 204 on the same side, which ensures that the flexible guide sleeve 201 can move smoothly inside the slider 2, providing precise guidance and stable support, and reducing offset and vibration.

[0043] Preferably, such as Figure 2 , Figure 6 and Figure 7 As shown, the guide groove 100 has guide portions 101 on both sides, the guide portions 101 are inclined to both sides along the guide groove 100, the limiting block 202 is provided with a mounting portion 213, and the roller 212 is interference-fitted with the mounting portion 213 and the guide portion 101 on the outer raceway 200.

[0044] Guide sections 101 are provided on both sides of the guide groove 100. These guide sections 101 are located on the inner edge of the guide groove 100 and extend along the length of the guide groove 100. They are usually designed as inclined or arc-shaped surfaces that gradually slope from the bottom of the guide groove 100 to both sides. They are used to guide and support the roller 212, ensuring that it runs smoothly along a predetermined path during movement, reducing offset and vibration, and maintaining a stable position. A mounting section 213 is provided on the limiting block 202, located on the inner side of the limiting block 202, close to the outer raceway 200. It is used to fix the roller 212 and precisely control the preload, ensuring that the position of the roller 212 in the outer raceway 200 is stable. The roller 212 is interference-fitted with the mounting section 213 and the guide section 101 on the outer raceway 200. This means that the diameter of the roller 212 is slightly larger than the gap between the mounting section 213 and the guide section 101, thereby generating a certain clamping force to ensure that the roller 212 is always subjected to a uniform preload, reducing clearance and improving the rigidity and stability of the system.

[0045] It should be noted that, in the process of achieving uniform preload, while keeping the dimensions of the raceway and the guide rail 1 slide the same, the dimensions of the roller 212 will be several micrometers larger than the dimensions of the raceway and the guide rail 1 slide, so that the rollers can achieve surface-to-surface contact.

[0046] Furthermore, such as Figure 6 , Figure 7 and Figure 9 As shown, a first guide surface 102 is provided on the guide part 101, and a second guide surface 206 is provided on the mounting part 213. The first guide surface 102 and the second guide surface 206 are arranged in parallel.

[0047] The first guide surface 102 and the second guide surface 206 are arranged in parallel to ensure that the roller 212 is subjected to uniform guiding force and support force during movement, reducing offset and vibration, and improving the guiding accuracy and stability of the system. Through high-precision machining and measurement, the flatness and parallelism of the first guide surface 102 and the second guide surface 206 are guaranteed, thereby achieving uniform preload distribution, reducing the clearance between the roller 212 and the slider 2 and the guide rail 1, and improving the rigidity and stability of the system.

[0048] Preferably, such as Figure 3 and Figure 7 , Figure 8 and Figure 9 As shown, the slider 2 includes a slider body 21 and end caps 22 located at both ends of the slider body 21. The slider body 21 has inner raceway holes 207 on the left and right sides for the movement of the rollers 212. The end caps 22 have a detachable inner circulation end cap 208 on the inner side. The inner circulation end cap 208, together with the inner raceway, the cage 20 and the outer raceway 200, forms a complete raceway for the flexible guide sleeve 201 to rotate cyclically.

[0049] The slider 2 includes a slider body 21 and end caps 22 located at both ends of the slider body 21. The slider body 21 has inner raceway holes 207 on the left and right sides for the movement of the rollers 212. These inner raceway holes 207 provide an internal movement path for the rollers 212. The end caps 22 have a detachable inner circulation end cap 208 on their inner side. The inner circulation end cap 208, together with the inner raceway, the cage 20 and the outer raceway 200, form a complete raceway system, ensuring that the flexible guide sleeve 201 can rotate smoothly inside the slider 2. This not only improves the convenience of maintenance but also enhances the stability of the system. By precisely controlling the position and size of each component, a uniform preload distribution is achieved, reducing the clearance between the rollers 212 and the slider 2 and the guide rail 1, improving the rigidity and accuracy of the system, and extending its service life.

[0050] Preferably, such as Figure 2 , Figure 4 and Figure 5 As shown, the flexible guide sleeve 201 is uniformly provided with a number of limiting members 209 along its length. The two sides of the limiting member 209 are respectively connected to the guide blocks 205 on both sides. Adjacent limiting members 209 form a groove for limiting the roller 212.

[0051] The flexible guide sleeve 201 is provided with a number of limiting members 209 evenly along its length. The two sides of these limiting members 209 are respectively connected to the guide blocks 205 on both sides of the flexible guide sleeve 201. Adjacent limiting members 209 form a groove for limiting the roller 212, which ensures the stable arrangement and correct position of the roller 212 in the flexible guide sleeve 201, reduces offset and vibration, and enhances the overall stability of the system. By precisely controlling the size and shape of the groove, a uniform preload distribution is achieved, which improves the performance and accuracy of the system.

[0052] Furthermore, such as Figure 5 As shown, the limiting member 209 includes a first locking part 210 and a second locking part 211 located on the left and right sides of the first locking part 210 and connected to the corresponding side guide block 205. The front and rear sides of the first locking part 210 and the second locking part 211 are provided with arc-shaped surfaces that are inclined from one end to the other end. The orientation of the first locking part 210 is opposite to the orientation of the second locking parts 211 on the left and right sides.

[0053] The limiting member 209 includes a first engaging portion 210 and second engaging portions 211 located on its left and right sides and connected to the corresponding side guide blocks 205. The front and rear sides of the first engaging portion 210 and the second engaging portion 211 are provided with arc-shaped surfaces that slope from one end to the other. The arc-shaped surface of the first engaging portion 210 faces in the opposite direction to the arc-shaped surfaces of the second engaging portions 211 on the left and right sides. This design ensures the stable arrangement and correct position of the rollers 212 in the flexible guide sleeve 201, prevents the rollers 212 from coming out, reduces offset and vibration, and enhances the overall stability of the system. By precisely controlling the size and shape of the slot, a uniform preload distribution is achieved, which improves the performance and accuracy of the system.

[0054] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A linear guide rail that facilitates roller preloading, characterized in that, include: The system includes a guide rail and a slider that moves along the length of the guide rail. Cages are connected to the left and right sides of the slider's interior. Each cage cooperates with the slider to form a raceway for the rollers to rotate cyclically. On the inner left and right side walls of the slider, the slider and the cage form an outer raceway for the movement of the roller. The roller is abutted against each other by the slider and the guide rail in the outer raceway to ensure that the roller always maintains a preset preload when the slider drives the roller to move. A flexible guide sleeve for mounting rollers is slidably connected in the raceway, and the flexible guide sleeve drives the rollers to move on the outer raceway; the guide rail has inwardly recessed guide grooves on both sides, and limit blocks are provided on the left and right sides inside the slider; a central bracket for fixing the flexible guide sleeve is provided on the retainer, and the central bracket is mounted on the limit blocks and slidably connected to the guide grooves; each side of the slider has two outer raceways, and the two outer raceways on the same side are mirror images of each other along the central bracket on the retainer; guide grooves are formed on the left and right sides of the outer raceway, and guide blocks are provided on both sides of the flexible guide sleeve, with the guide blocks on both sides slidably connected to the guide grooves on the same side respectively; The flexible guide sleeve is provided with a plurality of limiting members evenly along its length. The two sides of the limiting members are respectively connected to the guide blocks on both sides, and adjacent limiting members form a groove for limiting the roller.

2. A linear guide rail for easy roller preloading according to claim 1, characterized in that: The guide groove has guide portions on both sides, and the guide portions are inclined to both sides along the guide groove. The limiting block is provided with a mounting portion, and the roller is interference-fitted with the mounting portion and the guide portion on the outer raceway.

3. A linear guide rail for easy roller preloading according to claim 2, characterized in that: The guide portion is provided with a first guide surface, and the mounting portion is provided with a second guide surface, wherein the first guide surface and the second guide surface are arranged parallel to each other.

4. A linear guide rail for easy roller preloading according to claim 1, characterized in that: The slider includes a slider body and end caps located at both ends of the slider body. The slider body has inner raceway holes on the left and right sides for the movement of the rollers. The end caps have detachable inner circulation end caps on their inner sides. The inner circulation end caps, together with the inner raceway holes, the cage, and the outer raceway, form a complete raceway for the flexible guide sleeve to rotate cyclically.

5. A linear guide rail for easy roller preloading according to claim 1, characterized in that: The limiting member includes a first locking part and a second locking part located on the left and right sides of the first locking part and connected to the corresponding side guide block. The front and rear sides of the first locking part and the second locking part are provided with arc-shaped surfaces that are inclined from one end to the other end. The orientation of the first locking part is opposite to the orientation of the second locking parts on the left and right sides.

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