Self-positioning guide rail pair

Abstract

The invention relates to the technical field of guide rails, in particular to a self-positioning guide rail pair which comprises a guide rail base and a sliding block, the sliding block is slidably connected to the guide rail base and slides in the length direction of the guide rail base, a limiting groove is formed in the guide rail base and corresponds to the sliding block, the limiting groove is formed in the length direction of the guide rail base, and the sliding block is provided with a limiting strip corresponding to the limiting groove. The limiting strip is embedded in the limiting groove and can slide in the length direction of the limiting groove. A sliding groove is formed in the sliding block, a plurality of balls are arranged in the sliding groove in a sliding mode, the balls are limited in the sliding groove, the balls slide and rotate in the sliding groove, and the balls are used for abutting against the guide rail base; an oil groove is further formed in the sliding block, one side of the oil groove is communicated with the sliding groove, the other side of the oil groove is communicated with the outside, the sliding block is provided with a sealing plug corresponding to the oil groove, the sealing plug is detachably connected with the sliding block, and oil can flow out of the sliding groove and flow into the limiting groove. And balls and limiting strips in the sliding blocks can be well lubricated.

Description

Technical Field

[0001] The invention relates to the technical field of guide rails, and in particular to a self-positioning guide rail pair. Background Art

[0002] The parts that support and guide the moving components to move along a certain trajectory are called guide rails, and are often referred to as guide rails. The motion trajectory of the moving parts can be straight, circular or curved. Rolling circular guides can be classified as rolling thrust bearings, and curved guides are rarely used in machinery. Guide rails are a very important component in machines, especially in machine tools. The machining accuracy of machine tools is directly related to the accuracy of guide rails. For precision machine tools produced in small batches, the machining workload of guide rails accounts for about 40% of the entire machining workload of the entire machine tool. Moreover, once the guide rails are damaged, they are very difficult to repair.

[0003] The guide rail pair under the existing technology is usually composed of a slider and a guide rail. The slider can slide along the guide rail. The positioning of the slider is usually performed by a ball bearing. However, after long-term use, the lubrication performance of the ball bearing is easily reduced, thereby reducing the positioning effect and affecting the working stability of the guide rail pair. Summary of the invention

[0004] In order to solve the problem that the guide rail pair in the prior art is usually composed of a slider and a guide rail, the slider can slide along the guide rail, and the positioning of the slider is usually performed by ball bearings, but the lubrication performance of the ball bearings is prone to deterioration after long-term use, thereby reducing the positioning effect and affecting the working stability of the guide rail pair, the present application provides a self-positioning guide rail pair, and the specific solution is as follows.

[0005] A self-positioning guide rail pair, comprising a guide rail seat and a slider, wherein the slider is slidably connected to the guide rail seat, and the slider slides along the length direction of the guide rail seat, and a limiting groove is provided on the guide rail corresponding to the slider, and the limiting groove is provided along the length direction of the guide rail, and a limiting strip is provided on the slider corresponding to the limiting groove, and the limiting strip is embedded in the limiting groove and can slide along the length direction of the limiting groove; The slider is provided with a sliding groove, in which a plurality of balls are slidably arranged and the balls are restricted in the sliding groove, the balls slide and rotate in the sliding groove, and the balls are used to abut against the guide rail; An oil groove is also provided in the slider, one side of the oil groove is connected to the sliding groove, and the other side of the oil groove is connected to the outside. A sealing plug is provided on the slider corresponding to the oil groove, and the sealing plug is detachably connected to the slider, so that the oil can flow out of the sliding groove and flow into the limiting groove.

[0006] By adopting the above technical solution, the self-positioning guide pair realizes the function of stable sliding of the slider along the guide seat by setting the limit groove and the limit strip, avoiding the slider from deflecting or derailing during movement, and improving the reliability and safety of the system. At the same time, the sliding groove and ball design in the slider make the slider slide on the guide rail more smoothly, reduce friction, reduce wear, and extend the service life of the guide pair. The design of the oil tank can allow oil to flow into the limit groove to ensure the lubrication of the ball, and can also flow into the limit groove, further ensuring the lubrication between the limit strip and the limit groove, effectively preventing damage to metal parts due to dry friction, and further improving the operating efficiency and stability of the system.

[0007] Optionally, a polyurethane block treated with lipophilicity is further provided in the oil tank, and the polyurethane block is used to absorb oil. A thermal expansion and contraction strip is also provided in the oil tank corresponding to the polyurethane block, and the thermal expansion and contraction strip can squeeze the polyurethane block when expanded by heat.

[0008] By adopting the above technical scheme, a polyurethane block that has been oleophilically treated is provided. The polyurethane block can absorb oil and squeeze out the oil after being squeezed. At the same time, thermal expansion and contraction strips are provided to squeeze the oil. When the slider moves rapidly, the slider generates heat. Therefore, the thermal expansion and contraction strips can expand and squeeze the polyurethane block when heated to replenish the oil. The oil can both lubricate the slider and directly contact the slider, thereby cooling the slider.

[0009] Optionally, a guide groove is provided in the slider corresponding to the thermal expansion and contraction strip, one side of the guide groove is connected to the oil groove, and the other side of the guide groove is connected to the sliding groove, the thermal expansion and contraction strip is confined in the guide groove, and the polyurethane block extends into the guide groove and is provided with a pressure section, and the thermal expansion and contraction strip can resist the pressure section after expansion.

[0010] By adopting the above technical solution, when the thermal expansion and contraction strip expands due to heat, it can move along the guide groove, effectively resist the pressure-receiving section, and then squeeze the polyurethane block, so that the oil in the polyurethane block can flow along the guide groove into the sliding groove for lubrication, thereby improving the lubrication effect, reducing the friction between the slider and the guide rail, and extending the service life of the guide rail pair.

[0011] Optionally, the oil groove is arranged on the upper side of the guide groove, and the pressure sections of the polyurethane block are respectively arranged on both sides of the thermal expansion and contraction strip.

[0012] By adopting the above technical solution, the oil groove is set on the upper side of the guide groove, and the oil can flow normally into the guide groove under the action of gravity, so that the oil can flow normally into the sliding groove for lubrication, further improving the lubrication effect.

[0013] Optionally, the thermal expansion and contraction strip includes two strip bodies, and a clearance groove is left between the two strip bodies, and the clearance groove is for oil to pass through.

[0014] By adopting the above technical solution, two strips are used as thermal expansion and contraction strips, and a clearance groove is left for oil to pass through, which can reduce the situation where the oil is completely blocked, so that the oil can directly lubricate through the clearance groove, further improving the lubrication effect.

[0015] Optionally, extrusion blocks are protrudingly provided at both ends of the thermal expansion and contraction strip in the length direction, the extrusion blocks are fixedly connected to the thermal expansion and contraction strip, and the extrusion blocks are used to extrude the polyurethane block.

[0016] By adopting the above technical solution and setting an extrusion block to extrude the polyurethane block, it is possible to reduce the situation where the polyurethane block cannot be extruded due to different deformation shapes of the thermal expansion and contraction strips, thereby improving the extrusion effect on the polyurethane block and reducing the situation where the oil cannot play a lubricating effect.

[0017] Optionally, a guiding slope is provided on the extrusion block, and the guiding slope is provided on a side close to the pressure section, and a side of the guiding slope close to the polyurethane block is higher than a side away from the polyurethane block.

[0018] By adopting the above technical solution, a guiding slope is set on the extrusion block, and the oil can flow along the guiding slope when being squeezed out of the polyurethane block. After being squeezed, the oil can be used for lubrication more accurately under the guidance, reducing the situation where the oil cannot be used for lubrication.

[0019] Optionally, a plurality of positioning iron blocks are provided in the guide rail, and the positioning iron blocks are slidably connected to the guide rail. A locking piece is also provided on the positioning iron block, and the locking piece is used to limit the sliding of the positioning iron block. An electromagnet is provided on the slider, and the electromagnet is provided on both sides of the positioning iron block, and the electromagnet is used to adsorb the positioning iron block.

[0020] By adopting the above technical solution, multiple positioning iron blocks are set. Before working, the position of the positioning iron blocks is adjusted first, and the positions where the sliders need to stop are determined to fix the positioning iron blocks. After the fixation is completed, the electromagnet is started at a fixed time during the sliding process of the slider, and the position of the slider can be positioned by the electromagnet, thereby improving the accuracy of positioning.

[0021] Optionally, a mounting groove is provided on the lower side of the guide rail corresponding to the positioning iron block, the positioning iron block is slidably connected in the mounting groove and is confined in the mounting groove, an extension plate is provided on the slider corresponding to the mounting groove, and the electromagnet is installed on the extension plate.

[0022] By adopting the above technical solution, setting the installation groove can facilitate the installation of the positioning iron block. In summary, this application has at least the following beneficial effects: 1. The present application solves the problem that the guide rail pair under the prior art is usually composed of a slider and a guide rail, the slider can slide along the guide rail, and the positioning of the slider is usually performed by a ball bearing, but the lubrication performance of the ball bearing is easily reduced after long-term use, thereby reducing the positioning effect and affecting the working stability of the guide rail pair. The present application provides an oil tank that can pass oil to replenish the oil to the ball bearing and the guide rail seat, thereby reducing the situation in which the friction force increases due to long-term work and affects the accuracy of the guide rail.

[0023] 2. The present application also provides thermal expansion and contraction strips that can automatically squeeze the polyurethane block according to the temperature. When the slider repeatedly moves and causes friction and temperature rise, the polyurethane block can be squeezed by the thermal expansion and contraction strips. The oil can be automatically replenished for lubrication by the change of heat during the movement, further improving the convenience of oil replenishment, and the oil can also be used to reduce the temperature.

[0024] 3. The present application also sets a positioning iron block and an electromagnet. The positioning iron block can adjust the position in advance. After the slider stops moving, the electromagnet can be started to adsorb the positioning iron block to adjust the position of the slider, so that the slider can be positioned more accurately during the working process, further improving the production accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a three-dimensional diagram of the first embodiment.

[0026] Figure 2 It is a cross-sectional view of the first embodiment.

[0027] Figure 3 It is a cross-sectional view of the first embodiment.

[0028] Figure 4 It is a cross-sectional view of the second embodiment.

[0029] Figure 5 It is a cross-sectional view of the second embodiment.

[0030] Description of reference numerals: 1. Guide rail seat; 11. Limiting groove; 12. Mounting groove; 2. Slider; 21. Limiting strip; 22. Sliding groove; 23. Oil groove; 24. Sealing plug; 25. Polyurethane block; 251. Pressure section; 26. Thermal expansion and contraction strip; 261. Guide groove; 262. Strip body; 263. Displacement groove; 264. Extrusion block; 265. Guide slope; 27. Extension plate; 3. Positioning iron block; 31. Locking piece; 4. Electromagnet; DETAILED DESCRIPTION The present application is further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0031] Embodiment 1 A self-locating guide pair, such as Figure 1 and Figure 2 As shown, it includes a guide rail seat 1 and a slider 2, the slider 2 is slidably connected to the guide rail seat 1, the slider 2 slides along the length direction of the guide rail seat 1, the guide rail seat 1 is provided with a limiting groove 11 corresponding to the slider 2, the limiting groove is provided along the length direction of the guide rail seat 1, the slider 2 is provided with a limiting strip 21 corresponding to the limiting groove, the limiting strip 21 is embedded in the limiting groove and can slide along the length direction of the limiting groove. In specific implementation, the slider 2 can move along the guide rail under various drives such as electric, pneumatic, and hydraulic, so as to realize the movement of the slider 2.

[0032] like Figure 2 and Figure 3 As shown, a sliding groove 22 is provided in the slider 2, and a plurality of balls are slidably provided in the sliding groove 22 and the balls are restricted in the sliding groove 22. The balls slide and rotate in the sliding groove 22, and the balls are used to abut the guide rail seat 1. In specific implementation, the sliding groove 22 can be connected with the limiting groove, and the balls can contact the guide rail seat 1 at the limiting groove after being installed, thereby reducing the friction between the slider 2 and the guide rail seat 1, making the slider 2 slide more smoothly, thereby reducing the possibility of damage.

[0033] like Figure 1 and Figure 2 As shown, an oil groove 23 is also provided in the slider 2, one side of the oil groove 23 is connected to the sliding groove 22, and the other side of the oil groove 23 is connected to the outside. A sealing plug 24 is provided on the slider 2 corresponding to the oil groove 23, and the sealing plug 24 is detachably connected to the slider 2, and the oil can flow out of the sliding groove 22 and flow into the limit groove. In specific implementation, the sealing plug 24 is connected to the slider 2 in a threaded connection manner. After the sealing plug 24 is removed, oil can be introduced into the oil groove 23, and the oil can flow into the sliding groove 22 and the limit groove to lubricate the ball bearing and the guide rail seat 1, thereby achieving oil lubrication, improving the smoothness of the sliding of the slider 2, and increasing the service life of the product.

[0034] like Figure 2 and Figure 3As shown, a polyurethane block 25 treated with oleophilic treatment is also provided in the oil groove 23. The polyurethane block 25 is used to absorb oil. A heat expansion and cold contraction strip 26 is also provided in the oil groove 23 corresponding to the polyurethane block 25. The heat expansion and cold contraction strip 26 can squeeze the polyurethane block 25 when it expands under heat. In specific implementation, the polyurethane block 25 is similar to a sponge as a whole. After the oleophilic treatment, it can absorb and store oil. After squeezing, the stored oil can be discharged, reducing the situation where the oil lubricates once and causes the subsequent continuous lubrication. By detecting the overall temperature of the slider 2 by the heat expansion and cold contraction strip 26, it can be judged whether the slider 2 is in a high-intensity working state. When the temperature of the slider 2 rises, it can be judged that the slider 2 is moving repeatedly. At this time, the oil is passed through for lubrication, which can further improve the smoothness of the work. At the same time, the direct contact of the oil has a certain cooling effect, which can reduce the situation where the ball is damaged due to overheating, and further improve the service life.

[0035] like Figure 2 and Figure 3 As shown, a guide groove 261 is provided in the slider 2 corresponding to the thermal expansion and contraction strip 26, one side of the guide groove 261 is connected to the oil groove 23, and the other side of the guide groove 261 is connected to the sliding groove 22, the thermal expansion and contraction strip 26 is restricted in the guide groove 261, and the polyurethane block 25 extends into the guide groove 261 and is provided with a pressure section 251, and the thermal expansion and contraction strip 26 can resist the pressure section 251 after expansion. In specific implementation, the thermal expansion and contraction strip 26 can expand and contract along the guide groove 261, and after expanding and squeezing the pressure section 251, the oil can be squeezed out, thereby realizing the discharge of the oil.

[0036] like Figure 2 and Figure 3 As shown, the oil groove 23 is arranged on the upper side of the guide groove 261, and the pressure section 251 of the polyurethane block 25 is respectively arranged on both sides of the thermal expansion and contraction strip 26. The thermal expansion and contraction strip 26 includes two strip bodies 262, and a clearance groove 263 is left between the two strip bodies 262, and the clearance groove 263 is used for oil to pass through. In specific implementation, the two strip bodies 262 will shrink the clearance groove 263 to a certain extent after expansion, but the clearance groove 263 will always leave a certain gap for oil to flow out.

[0037] like Figure 2 and Figure 3As shown, extrusion blocks 264 are protruding from both ends of the thermal expansion and contraction strip 26 in the length direction. The extrusion blocks 264 are fixedly connected to the thermal expansion and contraction strip 26, and the extrusion blocks 264 are used to extrude the polyurethane block 25. A guide slope 265 is provided on the extrusion block 264, and the guide slope 265 is provided on a side close to the pressure section 251. The side of the guide slope 265 close to the polyurethane block 25 is higher than the side away from the polyurethane block 25. In specific implementation, the extrusion block 264 can extrude the polyurethane block 25 well, and after extrusion, the oil can flow along the guide slope 265, and the guide slope 265 can just guide the oil from the guide groove 261 to the sliding groove 22.

[0038] Working principle: When the slide works, friction heats up. When the temperature is high, it indicates that it is in working state. At this time, the thermal expansion and contraction strips 26 will squeeze out the stored oil, thereby lubricating the balls and the guide rail seat 1, while reducing the temperature and reducing overheating.

[0039] Embodiment 2 like Figure 4 and Figure 5 As shown, a plurality of positioning iron blocks 3 are also provided in the guide rail seat 1, and the positioning iron blocks 3 are slidably connected with the guide rail seat 1. The positioning iron blocks 3 are also provided with locking members 31, and the locking members 31 are used to limit the sliding of the positioning iron blocks 3. The slider 2 is provided with electromagnets 4, and the electromagnets 4 are provided on both sides of the positioning iron blocks 3, and the electromagnets 4 are used to adsorb the positioning iron blocks 3. In specific implementation, the positioning iron blocks 3 need to be set in advance before the movement of the slider 2, and are positioned by the locking members 31. The locking members 31 include bolts, and the bolts pass through the positioning iron blocks 3 and contact the slider 2 to achieve positioning. Subsequently, when the slider 2 moves to the vicinity of the positioning iron block 3, the electromagnet 4 is activated to fine-tune the position of the slider 2, so that the slider 2 is close to the positioning iron block 3 under magnetic adsorption, thereby achieving more accurate positioning.

[0040] like Figure 4 and Figure 5 As shown, the lower side of the guide rail seat 1 is provided with a mounting groove 12 corresponding to the positioning iron block 3, the positioning iron block 3 is slidably connected to the mounting groove 12 and is restricted in the mounting groove 12, and the slider 2 is provided with an extension plate 27 corresponding to the mounting groove 12, and the electromagnet 4 is installed on the extension plate 27. In specific implementation, the positioning iron block 3 / Working principle: The basic working principle of Example 2 is the same as that of Example 1, but Example 2 is provided with a positioning iron block 3 that can be adjusted along the guide rail seat 1, and the position of the positioning iron block 3 can be set in advance by measurement. When the slider 2 moves for the first time, the time when the slider 2 moves at each positioning iron block 3 is measured, and a self-starting program is written to the electromagnet 4. The electromagnet 4 is started according to the time when each positioning iron block 3 moves, so that the slider 2 can be adsorbed to a more precise position when the slider 2 moves, thereby further improving the positioning accuracy of the slider 2.

[0041] The above are preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A self-positioning guide rail pair, comprising a guide rail seat (1) and a slider (2), wherein the slider (2) is slidably connected to the guide rail seat (1), and the slider (2) slides along the length direction of the guide rail seat (1), characterized in that: The guide rail seat (1) is provided with a limiting groove (11) corresponding to the sliding block (2), the limiting groove is provided along the length direction of the guide rail seat (1), the sliding block (2) is provided with a limiting strip (21) corresponding to the limiting groove, the limiting strip (21) is embedded in the limiting groove and can slide along the length direction of the limiting groove; The slider (2) is provided with a sliding groove (22), and a plurality of balls are slidably arranged in the sliding groove (22) and the balls are confined in the sliding groove (22). The balls slide and rotate in the sliding groove (22), and the balls are used to abut against the guide rail seat (1); An oil groove (23) is also provided in the slider (2), one side of the oil groove (23) is connected to the sliding groove (22), and the other side of the oil groove (23) is connected to the outside. A sealing plug (24) is provided on the slider (2) corresponding to the oil groove (23), and the sealing plug (24) is detachably connected to the slider (2), so that oil can flow out of the sliding groove (22) and flow into the limit groove.

2. A self-positioning guide rail pair according to claim 1, characterized in that: A polyurethane block (25) which has been subjected to lipophilic treatment is also arranged in the oil groove (23). The polyurethane block (25) is used to absorb oil. A thermal expansion and contraction strip (26) is also arranged in the oil groove (23) corresponding to the polyurethane block (25). The thermal expansion and contraction strip (26) can squeeze the polyurethane block (25) when it expands due to heat.

3. A self-positioning guide rail pair according to claim 2, characterized in that: A guide groove (261) is provided in the slider (2) corresponding to the thermal expansion and contraction strip (26); one side of the guide groove (261) is connected to the oil groove (23), and the other side of the guide groove (261) is connected to the sliding groove (22); the thermal expansion and contraction strip (26) is confined in the guide groove (261); the polyurethane block (25) extends into the guide groove (261) and is provided with a pressure section (251); the thermal expansion and contraction strip (26) can resist the pressure section (251) after expansion.

4. A self-positioning guide rail pair according to claim 3, characterized in that: The oil groove (23) is arranged on the upper side of the guide groove (261), and the pressure-bearing section (251) of the polyurethane block (25) is respectively arranged on both sides of the thermal expansion and contraction strip (26).

5. A self-positioning guide rail pair according to claim 4, characterized in that: The thermal expansion and contraction strip (26) comprises two strip bodies (262), a clearance groove (263) is left between the two strip bodies (262), and the clearance groove (263) allows oil to pass through.

6. A self-positioning guide rail pair according to claim 4, characterized in that: Extrusion blocks (264) are protrudingly provided at both ends of the thermal expansion and contraction strip (26) in the length direction. The extrusion blocks (264) are fixedly connected to the thermal expansion and contraction strip (26). The extrusion blocks (264) are used to extrude the polyurethane block (25).

7. The self-positioning guide rail pair according to claim 6, characterized in that: The extrusion block (264) is provided with a guide slope (265), and the guide slope (265) is provided on a side close to the pressure section (251), and the side of the guide slope (265) close to the polyurethane block (25) is higher than the side away from the polyurethane block (25).

8. The self-positioning guide rail pair according to claim 1, characterized in that: A plurality of positioning iron blocks (3) are also arranged in the guide rail seat (1), the positioning iron blocks (3) are slidably connected to the guide rail seat (1), the positioning iron blocks (3) are also provided with locking members (31), the locking members (31) are used to limit the sliding of the positioning iron blocks (3), the slider (2) is provided with electromagnets (4), the electromagnets (4) are arranged on both sides of the positioning iron blocks (3), and the electromagnets (4) are used to adsorb the positioning iron blocks (3).

9. A self-positioning guide rail pair according to claim 8, characterized in that: The lower side of the guide rail seat (1) is provided with a mounting groove (12) corresponding to the positioning iron block (3); the positioning iron block (3) is slidably connected to the mounting groove (12) and is restricted in the mounting groove (12); an extension plate (27) is provided on the slider (2) corresponding to the mounting groove (12); and the electromagnet (4) is installed on the extension plate (27).

Images