Rigid linear guide rail

Abstract

The utility model relates to a rigid linear guide rail which comprises a guide rail body, sliding grooves are formed in the two sides of the guide rail body respectively, and the sliding grooves extend to the two ends of the guide rail body in the length direction. A limiting sliding block is arranged on the inner side of the sliding seat, and the sliding seat is connected to the guide rail body in a sliding mode through the limiting sliding block; the oil absorption blocks are embedded in the groove walls of the sliding grooves and are close to the two ends of the guide rail body, and liquid storage cavities are formed in the positions, close to the two ends, in the guide rail body; according to the guide rail, the liquid storage cavity and the oil outlet groove are arranged and matched with the oil outlet hole and the oil suction block, so that when the limiting sliding block is in sliding friction with the first friction surface and the second friction surface, the limiting sliding block can make contact with the oil suction block at the positions, close to the two ends, of the guide rail body, and therefore lubricating oil is wiped to the limiting sliding block; therefore, friction force between the limiting sliding block and the first friction surface and the second friction surface is reduced, and the service life of the guide rail body is prolonged.

Description

A rigid linear guide Technical Field

[0001] This utility model relates to the field of rigid guide rail technology, specifically a rigid linear guide rail. Background Technology

[0002] Rigid linear guides are core components for achieving high-precision linear motion in industrial equipment. Their high rigidity design enables them to withstand heavy loads and impacts while maintaining motion stability.

[0003] Currently, rigid linear guides are used in conjunction with sliding blocks that are slidably connected to the guide rail for reciprocating motion. The sliding block and the guide rail are connected by ball bearings and limit sliders. The ball bearings ensure smooth sliding and reduce friction, while the limit sliders ensure stability during sliding and prevent the slide block from shifting. However, it has been found in use that because the friction between the limit slider and the guide rail is surface-to-surface, the friction is relatively high. Over long periods of reciprocating motion, the wear on the limit slider and the contact surface between the limit slider and the guide rail is quite severe, reducing the service life of the guide rail. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this utility model provides a rigid linear guide rail, which solves the technical problem of excessive friction between the existing rigid linear guide rail and the upper limit slider of the slide block, resulting in significant wear of the guide rail.

[0005] This utility model discloses a rigid linear guide rail, comprising: a guide rail body, wherein sliding grooves are provided on both sides of the guide rail body and the sliding grooves extend along the length direction to both ends of the guide rail body; and a slide block, wherein a limiting slider is provided on the inner side of the slide block and the slide block is slidably connected to the guide rail body through the limiting slider.

[0006] An oil-absorbing block is embedded in the groove wall of the slide and located near both ends of the guide rail body. A liquid storage cavity is provided inside the guide rail body near both ends. The oil-absorbing block includes an oil-absorbing surface and an oil-discharging surface. The oil-absorbing surface contacts the lubricating oil inside the liquid storage cavity. When the slide block slides, the limiting slider contacts the oil-discharging surface of the oil-absorbing block to lubricate the limiting slider.

[0007] As a further improvement of this utility model, the slide groove includes a first friction surface and a second friction surface. The first friction surface is inclined at 45°, and the second friction surface is perpendicular to the width direction of the guide rail body. The limiting slider is in contact with the first friction surface and the second friction surface, and the oil suction block is located between the limiting slider, the first friction surface, and the second friction surface.

[0008] As a further improvement of this utility model, multiple oil outlet grooves are provided on both the first friction surface and the second friction surface near both ends of the guide rail body. Each of the multiple oil outlet grooves has an oil outlet hole on its bottom wall. The oil outlet groove is connected to the liquid storage chamber through the oil outlet hole. The size of the oil outlet groove is adapted to the oil suction block, and the oil suction block is located in the oil outlet groove.

[0009] As a further improvement of this utility model, the limiting slider includes a mounting surface and two contact surfaces. The mounting surface is fixedly connected to the inner sidewall of the slide block, and the two contact surfaces are slidably connected to the first friction surface and the second friction surface, respectively.

[0010] As a further improvement of this utility model, slots are provided at both ends of the guide rail body at positions corresponding to the liquid storage cavity. The height, shape and size of the slots are the same as those of the liquid storage cavity. Oil injection holes and oil drainage holes communicating with the liquid storage cavity are provided at the top and bottom of the slots on the side close to the liquid storage cavity.

[0011] As a further improvement of this utility model, a sealing strip is movably inserted into the slot, and a sealing plug is provided on one side of the sealing strip at a position corresponding to the oil injection hole and the oil drain hole. The size of the sealing plug is adapted to the size of the oil injection hole and the oil drain hole.

[0012] As a further improvement of this utility model, the top surface of the guide rail body is provided with a plurality of fixing holes along the length direction. The plurality of fixing holes penetrate the guide rail body in the vertical direction. The inner walls of the plurality of fixing holes are smooth surfaces. The inner walls of the plurality of fixing holes have stepped limiting surfaces near the top. The slide is arranged in an n-shaped structure.

[0013] As a further improvement of this utility model, ball grooves are provided along the length direction on both sides of the guide rail body near the top, and multiple ball bodies are installed on the inner side of the slide block at positions corresponding to the ball grooves.

[0014] As a further improvement of this utility model, the ball groove is arc-shaped in side view, and the curvature of the ball groove matches the curvature of the outer surface of the ball body.

[0015] As a further improvement of this utility model, a threaded hole is provided through the sliding direction at the center position near the top on one side of the slide block, and the threaded hole is used for threaded connection with an external lead screw.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] In this invention, by setting up a liquid storage cavity and an oil outlet groove, along with an oil outlet hole and an oil suction block, the limiting slider can contact the oil suction block near both ends of the guide rail body when sliding and rubbing against the first friction surface and the second friction surface. This allows the lubricating oil to be wiped onto the limiting slider, thereby reducing the friction between the limiting slider and the first and second friction surfaces and extending the service life of the guide rail body. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0019] Figure 1 is a schematic diagram of the overall three-dimensional structure of this utility model;

[0020] Figure 2 is a schematic diagram of the overall three-dimensional bottom view of the present invention;

[0021] Figure 3 is a schematic diagram of the overall three-dimensional cross-sectional structure of this utility model;

[0022] Figure 4 is a schematic diagram of the overall side view of this utility model;

[0023] Figure 5 is an enlarged structural schematic diagram of point A in Figure 2 of this utility model.

[0024] In the figure: 1. Guide rail body; 11. First friction surface; 12. Second friction surface; 13. Ball groove; 14. Fixing hole; 2. Slide block; 21. Limiting slider; 22. Ball body; 23. Threaded hole; 211. Mounting surface; 212. Contact surface; 3. Slide groove; 31. Liquid storage chamber; 32. Oil outlet groove; 33. Oil outlet hole; 34. Sealing strip; 35. Slot; 36. Oil suction block; 341. Sealing plug; 351. Oil injection hole; 352. Oil drain hole. Detailed Implementation

[0025] The following illustrations will reveal several embodiments of the present invention. For clarity, many physical details will be described in the following description. However, it should be understood that these physical details should not be used to limit the present invention. That is, in some embodiments of the present invention, these physical details are not essential. Furthermore, for the sake of simplicity, some conventional structures and components will be shown in a simple schematic manner in the illustrations.

[0026] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0027] In the description of this technology, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "install," "connect," and "link" 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 technology based on the specific circumstances.

[0028] Furthermore, 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. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0029] Please refer to Figures 1-5. A rigid linear guide rail of this utility model includes: a guide rail body 1, and sliding grooves 3 are respectively provided on both sides of the guide rail body 1. The sliding grooves 3 extend along the length direction to the ends of both ends of the guide rail body 1.

[0030] Slide 2, with a limiting slider 21 on its inner side, slide 2 is slidably connected to guide rail body 1 through the limiting slider 21;

[0031] Oil-absorbing block 36 is embedded in the groove wall of slide groove 3 and close to both ends of guide rail body 1. Liquid storage chambers 31 are opened inside guide rail body 1 near both ends. Oil-absorbing block 36 includes oil-absorbing surface and oil-discharging surface. The oil-absorbing surface is in contact with the lubricating oil inside the liquid storage chamber 31. When slide seat 2 slides, limit slider 21 is in contact with the oil-discharging surface of oil-absorbing block 36 to lubricate limit slider 21.

[0032] The guide rail body 1 refers to the main structure of the linear guide rail, which is usually made of metal and has sufficient rigidity and wear resistance. The slide groove 3 refers to the groove structure opened on both sides of the guide rail body 1 for guidance, and its cross-sectional shape can be V-shaped, U-shaped or other shapes suitable for sliding. The slide block 2 refers to the sliding component installed on the guide rail body 1, and the limiting slider 21 set on its inner side can be a metal slider or a slider with a wear-resistant coating. The oil suction block 36 refers to a porous material block with oil suction and oil discharge functions, which can be sintered metal, porous ceramic or other materials with capillary action. The liquid storage cavity 31 refers to the cavity opened inside the guide rail body 1 for storing lubricating oil, and its volume and shape can be designed according to lubrication requirements.

[0033] The guide rail body 1 and the slide block 2 are slidably connected by the cooperation of the limiting slider 21 and the slide groove 3. Specifically, the limiting slider 21 is embedded in the slide groove 3 and can slide freely in the slide groove 3. The oil-absorbing block 36 is embedded in the groove wall of the slide groove 3 and can be fixed by mechanical pressing, bonding or snap-fitting. The oil-absorbing surface of the oil-absorbing block 36 is in contact with the lubricating oil inside the liquid storage cavity 31 and absorbs the lubricating oil through capillary action. When the slide block 2 slides, the limiting slider 21 will contact and rub against the oil outlet surface of the oil-absorbing block 36, thereby evenly applying the lubricating oil to the surface of the limiting slider 21 to achieve a continuous lubrication effect.

[0034] The statement that the oil-absorbing block 36 is embedded in the groove wall of the slide 3 and is located near both ends of the guide rail body 1 needs to be explained in detail. It means that the oil-absorbing block 36 is not set along the entire length of the slide 3, but is selectively installed near both ends of the guide rail body 1. This is because at both ends of the linear guide rail, the movement direction of the slide block 2 will change, and the friction between the limiting slider 21 and the slide 3 will be more intense, requiring more lubricating oil. This arrangement ensures the lubrication effect and avoids the waste of lubricating oil.

[0035] By setting oil suction blocks 36 and liquid storage chambers 31 at both ends of the guide rail body 1, the automatic lubrication function of the limit slider 21 is realized. Compared with the traditional method of manually adding lubricating oil periodically, it has the advantages of uniform lubrication, good continuity, and long maintenance cycle. At the same time, since the lubricating oil is stored in the liquid storage chamber 31 inside the guide rail body 1 and is slowly released through the oil suction blocks 36, the problem of lubricating oil leakage and environmental pollution is avoided. This structural design is particularly suitable for high-precision linear guide rail systems that require long-term stable operation, which can significantly extend the service life of the guide rail and maintain stable motion accuracy.

[0036] Please refer to Figures 1 and 5. In this embodiment, the slide 3 includes a first friction surface 11 and a second friction surface 12. The first friction surface 11 is inclined at 45°, and the second friction surface 12 is perpendicular to the width direction of the guide rail body 1. The limiting slider 21 is in contact with the first friction surface 11 and the second friction surface 12. The oil suction block 36 is located between the limiting slider 21 and the first friction surface 11 and the second friction surface 12.

[0037] Multiple oil outlet grooves 32 are provided on the first friction surface 11 and the second friction surface 12 near both ends of the guide rail body 1. Each of the multiple oil outlet grooves 32 has an oil outlet hole 33 on its bottom wall. The oil outlet grooves 32 are connected to the liquid storage chamber 31 through the oil outlet holes 33. The size of the oil outlet grooves 32 is adapted to the oil suction block 36, and the oil suction block 36 is located in the oil outlet grooves 32.

[0038] The limiting slider 21 includes a mounting surface 211 and two contact surfaces 212. The mounting surface 211 is fixedly connected to the inner side wall of the slide block 2, and the two contact surfaces 212 are slidably connected to the first friction surface 11 and the second friction surface 12, respectively.

[0039] The first friction surface 11 and the second friction surface 12 refer to the two guide surfaces in the groove 3 that are used to contact the limiting slider 21. The first friction surface 11 is inclined at 45° and can withstand radial and axial loads. The second friction surface 12 is set perpendicular to the width direction of the guide rail body 1 and mainly bears radial loads. The oil outlet groove 32 refers to the groove opened on the friction surface to accommodate the oil suction block 36. Its shape can be rectangular, circular or other regular shapes. The oil outlet hole 33 is the channel connecting the oil outlet groove 32 and the liquid storage chamber 31. The hole diameter can be designed according to the lubrication requirements. The mounting surface 211 refers to the plane on the limiting slider 21 that is connected to the slide block 2. It can be fixed by bolts, welding or bonding. The contact surface 212 refers to the sliding surface on the limiting slider 21 that is in direct contact with the friction surface. It usually needs to be treated with wear resistance.

[0040] The first friction surface 11 and the second friction surface 12 together form the guide structure of the slide groove 3. The two contact surfaces 212 of the limiting slider 21 contact the two friction surfaces respectively and slide relative to each other. The oil suction block 36 is set in the oil outlet groove 32. Its size matches the oil outlet groove 32 and can be fixed by pressing or bonding. The lubricating oil in the reservoir 31 enters the oil outlet groove 32 through the oil outlet hole 33. After being absorbed by the oil suction block 36, it seeps out through capillary action. When the limiting slider 21 slides, its contact surface 212 contacts the oil suction block 36, and the lubricating oil is evenly applied to the friction surface. The slide block 2 is fixedly connected through the mounting surface 211 of the limiting slider 21. It can be achieved by bolt connection, bonding or integral molding.

[0041] The statement that multiple oil outlet grooves 32 are provided on both the first friction surface 11 and the second friction surface 12 near both ends of the guide rail body 1 needs to be explained in detail. This indicates that the oil outlet grooves 32 are not evenly distributed across the entire friction surface, but are concentrated near both ends of the guide rail body 1. This is because the friction is more intense in the areas where the movement direction changes at both ends of the guide rail, requiring more concentrated lubrication. At the same time, the arrangement of multiple oil outlet grooves 32 can ensure the continuity and uniformity of lubricating oil supply, avoiding the occurrence of insufficient lubrication in certain areas.

[0042] Through a specific friction surface angle design and oil outlet groove 32 arrangement, multi-directional precise guidance and efficient lubrication of the limiting slider 21 are achieved; the 45° inclined first friction surface 11 can simultaneously bear radial and axial loads, improving the load-bearing capacity of the guide rail; the oil outlet grooves 32 concentrated at both ends ensure the lubrication needs of key positions while avoiding the waste of lubricating oil; the double contact surface 212 design of the limiting slider 21 ensures stable contact with the friction surface, improving motion accuracy and service life; compared with ordinary linear guide rails, this solution has significant advantages such as high lubrication efficiency, strong load-bearing capacity, and smooth motion.

[0043] Please refer to Figures 1 and 5. It should be noted that slots 35 are provided at both ends of the guide rail body 1 at positions corresponding to the liquid storage cavity 31. The height, shape and size of the slots 35 are the same as those of the liquid storage cavity 31. Oil injection holes 351 and oil discharge holes 352 communicating with the liquid storage cavity 31 are provided at the top and bottom of the slots 35 on the side close to the liquid storage cavity 31.

[0044] A sealing strip 34 is movably inserted into the slot 35. A sealing plug 341 is provided on one side of the sealing strip 34 at a position corresponding to the oil filling hole 351 and the oil drain hole 352. The size of the sealing plug 341 is adapted to the size of the oil filling hole 351 and the oil drain hole 352.

[0045] The slot 35 refers to the groove structure opened at both ends of the guide rail body 1 to accommodate the sealing strip 34. Its shape can be rectangular, trapezoidal or other regular shape, and its size matches the liquid storage cavity 31. The oil injection hole 351 is a channel set at the top of the slot 35 for injecting lubricating oil into the liquid storage cavity 31. It usually has internal threads for connecting the oil injection nozzle. The oil drain hole 352 is a channel set at the bottom of the slot 35 for draining waste oil. It can be equipped with a dust cover. The sealing strip 34 is a long strip-shaped sealing element inserted into the slot 35. It can be made of rubber, polyurethane or other elastic materials. The sealing plug 341 is a protrusion structure fixed on the sealing strip 34. Its material is usually the same as the sealing strip 34. It is used to seal the oil injection hole 351 and the oil drain hole 352.

[0046] The slot 35 and the liquid storage chamber 31 are positioned opposite each other and are the same size. They are connected by an oil filling hole 351 and an oil drain hole 352. The sealing strip 34 is installed in the slot 35 by a movable insertion method and can be pulled out as a whole for maintenance. The sealing plug 341 on the sealing strip 34 corresponds to the positions of the oil filling hole 351 and the oil drain hole 352. When the sealing strip 34 is fully inserted into the slot 35, the sealing plug 341 will press against the orifice to achieve a seal. When filling with oil, the sealing strip 34 can be partially pulled out to expose the oil filling hole 351. After filling, the sealing strip 34 can be fully inserted again. The oil draining operation is the same. The opening and closing of the oil drain hole 352 is controlled by adjusting the position of the sealing strip 34.

[0047] The statement that the height, shape, and size of the slot 35 are the same as those of the liquid storage cavity 31 needs to be explained in detail. This indicates that the slot 35 is not a simple through-hole structure, but has the same three-dimensional dimensions and shape characteristics as the liquid storage cavity 31. This design allows the sealing strip 34 to completely cover the opening area of ​​the liquid storage cavity 31, ensuring a sealing effect. At the same time, the movable plug-in connection means that the sealing strip 34 can be easily disassembled and installed, providing operating space for adding and replacing lubricating oil.

[0048] Through the innovative design of the slot 35 and the sealing strip 34, the oil storage chamber 31 is able to be sealed for oil filling and draining. Compared with the traditional fixed oil filling port design, it has the advantages of convenient maintenance, reliable sealing, and simple operation. The integrated design of the sealing strip 34 not only ensures the synchronous opening and closing of the oil filling and draining holes 352, but also avoids the problem of easy loss of individual seals. This structure is particularly suitable for high-precision guide rail systems that require regular maintenance. It can significantly extend the oil replacement cycle and maintain the cleanliness of the lubrication system, thereby improving the service life and motion accuracy of the guide rail.

[0049] Please refer to Figures 1 and 5. Specifically, the top surface of the guide rail body 1 has multiple fixing holes 14 along the length direction. The multiple fixing holes 14 penetrate the guide rail body 1 in the vertical direction. The inner walls of the multiple fixing holes 14 are smooth surfaces. The inner walls of the multiple fixing holes 14 have stepped limiting surfaces near the top. The slide 2 is arranged in an n-shaped structure.

[0050] The guide rail body 1 has ball grooves 13 extending through the length direction on both sides near the top. Multiple ball bodies 22 are installed on the inner side of the slide block 2 at positions corresponding to the ball grooves 13.

[0051] The ball groove 13 is arc-shaped when viewed from the side, and the curvature of the ball groove 13 matches the curvature of the outer surface of the ball body 22.

[0052] A threaded hole 23 is provided on one side of the slide block 2 near the center of the top, along the sliding direction. The threaded hole 23 is used for threaded connection with an external lead screw.

[0053] The fixing hole 14 is a through hole opened on the top surface of the guide rail body 1 for installation and fixing. Its smooth inner wall can reduce bolt friction, and the stepped limiting surface can prevent the bolt from being over-tightened. The n-shaped structure describes the cross-sectional shape of the slide 2, and its two side walls extend downward to form a structure that covers the guide rail body 1. The ball groove 13 is an arc-shaped channel opened on the top of both sides of the guide rail body 1 to accommodate the balls. Its curvature is precisely designed. The ball body 22 refers to the spherical rolling element installed on the inner side of the slide 2. It is usually made of wear-resistant materials such as bearing steel. The threaded hole 23 is an internal threaded hole 23 opened on the slide 2. It is used to cooperate with the lead screw to realize transmission. Its thread specification can be selected according to the load requirements.

[0054] The guide rail body 1 is connected to external equipment through the fixing hole 14. After the bolt passes through the fixing hole 14, it is positioned by the stepped limiting surface. The n-shaped structure of the slide 2 covers the guide rail body 1, and the inner ball body 22 is embedded in the ball groove 13 to achieve rolling contact. The arc design of the ball groove 13 is precisely matched with the curvature of the outer surface of the ball body 22 to ensure that the contact area 212 is maximized. The slide 2 is connected to the external lead screw through the threaded hole 23. When the lead screw rotates, it drives the slide 2 to slide along the guide rail body 1. The ball body 22 rolls in the ball groove 13, converting sliding friction into rolling friction, which significantly reduces motion resistance.

[0055] The statement that the ball groove 13 is arc-shaped when viewed from the side and that the arc of the ball groove 13 matches the arc of the outer surface of the ball body 22 needs to be explained in detail. This indicates that the ball groove 13 is not a simple planar channel, but a specially designed arc-shaped structure with a radius of curvature that is the same as or slightly larger than the radius of the ball body 22. This design ensures that the contact between the ball and the groove 3 is a line contact rather than a point contact, which not only ensures the load-bearing capacity but also reduces the contact stress, and at the same time effectively prevents the ball from shifting during movement.

[0056] The precise fit between the ball groove 13 and the ball body 22 enables high-precision, low-friction linear motion. The n-shaped slide 2 structure enhances overall rigidity and prevents deformation during movement. The stepped limiting surface design of the fixing hole 14 ensures installation and positioning accuracy. The fit between the threaded hole 23 and the lead screw enables precise transmission control. Compared with traditional sliding guides, this solution has significant advantages such as low motion resistance, high positioning accuracy, and long service life, making it particularly suitable for automated equipment requiring high-precision linear motion.

[0057] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A rigid linear guide rail, characterized in that, include: The guide rail body (1) has a sliding groove (3) on both sides, which extends along the length to both ends of the guide rail body (1); the slide block (2) has a limiting slider (21) on its inner side, and the slide block (2) is slidably connected to the guide rail body (1) through the limiting slider (21); the oil suction block (36) is embedded in the groove wall of the sliding groove (3) and close to both ends of the guide rail body (1), and a liquid storage cavity (31) is opened in the guide rail body (1) near both ends. The oil suction block (36) includes an oil suction surface and an oil outlet surface. The oil suction surface is in contact with the lubricating oil inside the liquid storage cavity (31). When the slide block (2) slides, the limiting slider (21) is in contact with the oil outlet surface of the oil suction block (36) to lubricate the limiting slider (21).

2. The rigid linear guide rail according to claim 1, characterized in that: The slide (3) includes a first friction surface (11) and a second friction surface (12). The first friction surface (11) is inclined at 45°, and the second friction surface (12) is perpendicular to the width direction of the guide rail body (1). The limiting slider (21) is in contact with the first friction surface (11) and the second friction surface (12). The oil suction block (36) is located between the limiting slider (21), the first friction surface (11), and the second friction surface (12).

3. The rigid linear guide rail according to claim 2, characterized in that: Multiple oil outlet grooves (32) are provided on the first friction surface (11) and the second friction surface (12) near both ends of the guide rail body (1). Each of the multiple oil outlet grooves (32) has an oil outlet hole (33) on its bottom wall. The oil outlet groove (32) is connected to the liquid storage chamber (31) through the oil outlet hole (33). The size of the oil outlet groove (32) is adapted to the oil suction block (36). The oil suction block (36) is located in the oil outlet groove (32).

4. The rigid linear guide rail according to claim 2, characterized in that: The limiting slider (21) includes a mounting surface (211) and two contact surfaces (212). The mounting surface (211) is connected and fixed to the inner wall of the slide block (2). The two contact surfaces (212) are slidably connected to the first friction surface (11) and the second friction surface (12) respectively.

5. The rigid linear guide rail according to claim 1, characterized in that: The guide rail body (1) has slots (35) at both ends corresponding to the liquid storage cavity (31). The height, shape and size of the slots (35) are the same as those of the liquid storage cavity (31). The top and bottom of the slots (35) near the liquid storage cavity (31) are provided with oil injection holes (351) and oil discharge holes (352) communicating with the liquid storage cavity (31).

6. The rigid linear guide rail according to claim 5, characterized in that: A sealing strip (34) is movably inserted into the slot (35). A sealing plug (341) is provided on one side of the sealing strip (34) at a position corresponding to the oil injection hole (351) and the oil drain hole (352). The size of the sealing plug (341) is adapted to the size of the oil injection hole (351) and the oil drain hole (352).

7. The rigid linear guide rail according to claim 1, characterized in that: The top surface of the guide rail body (1) has multiple fixing holes (14) along the length direction. The multiple fixing holes (14) penetrate the guide rail body (1) in the vertical direction. The inner walls of the multiple fixing holes (14) are smooth surfaces. The inner walls of the multiple fixing holes (14) have stepped limiting surfaces near the top. The slide block (2) is arranged in an n-shaped structure.

8. The rigid linear guide rail according to claim 7, characterized in that: The guide rail body (1) has ball grooves (13) extending through it along its length on both sides near the top. The slide block (2) has multiple ball bodies (22) installed at positions corresponding to the ball grooves (13) on its inner side.

9. The rigid linear guide rail according to claim 8, characterized in that: The ball groove (13) is arc-shaped when viewed from the side, and the curvature of the ball groove (13) matches the curvature of the outer surface of the ball body (22).

10. The rigid linear guide rail according to claim 8, characterized in that: A threaded hole (23) is provided on one side of the slide (2) near the center of the top along the sliding direction. The threaded hole (23) is used to connect with an external lead screw.

Images