A high-rigidity linear slide rail with automatic centering and four-way load capacity

Abstract

The application discloses a high-rigidity linear sliding rail with automatic centering and four-direction load capacity, and particularly relates to the technical field of linear sliding rails, and comprises a guide rail, a sliding block is slidably arranged on the top of the guide rail, and a transmission unit is arranged on the inner side top end of the sliding block and comprises two groups of upper load bearings arranged in a symmetrical mode. The four-column circular-arc ball groove and the 45-degree contact angle of the steel ball can balance the four-direction load of the radial direction, the reverse radial direction and the horizontal and vertical directions, and realize automatic centering. Four groups of pre-pressing clamping positioning blocks are arranged between the sliding block and the bottom end of the guide rail, so that the installation precision and the operation stability of the sliding block on the guide rail can be obviously improved, the deviation and vibration in the sliding process can be further inhibited, the accurate positioning and the guiding constraint for the linear motion can be continuously provided, the high-precision smooth sliding of the sliding block along the guide rail axis direction is realized, and the positioning precision and the motion smoothness in the linear transmission process are double-protected.

Description

Technical Field

[0001] This invention relates to the field of linear guide rail technology, and specifically to a high-rigidity linear guide rail with self-aligning and four-way equal load capacity. Background Technology

[0002] Linear guideways, as core actuators in precision transmission systems, are widely used in high-end equipment with stringent motion accuracy requirements, such as CNC machine tools, automated production lines, semiconductor equipment, and precision measuring instruments. In the high-speed cutting operations of CNC machine tools, their positioning accuracy directly determines the dimensional tolerances and surface roughness of the workpiece. In semiconductor chip packaging equipment, micron-level motion stability is crucial to avoiding chip damage and ensuring packaging yield. In automated precision assembly lines, their smooth operation directly affects the line's operational efficiency and continuous stability. Therefore, the positioning accuracy and operational stability of linear guideways are not only important indicators of equipment core performance but also directly determine the equipment's processing quality, operational efficiency, and service life. However, existing linear guideway designs have some shortcomings, making them difficult to adapt to the precision transmission requirements of high-end equipment. Currently, most linear guideways use a snap-fit ​​connection between the slider and the guide rail, with rolling steel balls forming the connection. This lacks effective pre-clamping and flexible adaptation structures, which not only makes it difficult to form a continuous tight constraint between the slider and the guide rail positioning surface, but also easily creates inherent assembly gaps that are difficult to eliminate through structural self-compensation. Over long-term use, this can cause the slider to lose stable positioning constraints, resulting in lateral offset, circumferential oscillation, and high-frequency vibration. Especially in high-speed cutting and high-frequency reciprocating transmission conditions, small deviations accumulate with the motion cycle, leading to a significant increase in positioning repeatability errors. Furthermore, the inability to accommodate small errors in the mounting surface further damages positioning stability and motion smoothness, resulting in poor performance. Summary of the Invention

[0003] The purpose of this invention is to provide a high-rigidity linear guide rail with self-alignment and four-way equal load capacity. Through a design of four rows of arc-shaped ball grooves and a 45° contact angle with the steel balls, it can evenly bear radial, anti-radial, and longitudinal loads and achieve self-alignment. Furthermore, by setting four sets of pre-loaded clamping positioning blocks between the bottom of the slider and the guide rail, the installation accuracy and operational stability of the slider on the guide rail can be significantly improved, further suppressing offset and vibration during sliding. This provides continuous precise positioning and guiding constraints for linear motion, enabling high-precision and smooth sliding of the slider along the guide rail axis, thus achieving dual guarantees of positioning accuracy and smooth movement during linear transmission. By setting a limiting unit, which consists of multiple sets of flexibly telescopically distributed annular positioning heads on the top and bottom sides of the positioning blocks, this structure not only greatly reduces the gap between the positioning blocks and positioning grooves to ensure positioning reliability, but also achieves flexible floating adaptation and vibration buffering on the positioning contact surface, accommodating minor installation errors and dynamic deviations, reducing friction loss, improving smoothness of movement, and enhancing the impact resistance of the positioning structure, thus extending the overall service life and addressing the aforementioned shortcomings in the technology.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a high-rigidity linear guide rail with self-aligning and four-way equal load capacity, comprising: A guide rail, wherein a slider is slidably mounted on the top of the guide rail; The transmission unit includes two sets of upper bearing bearings symmetrically arranged on the top inner side of the slider, and two sets of lower bearing bearings symmetrically arranged on the inner side of the slider near the lower part of the upper bearing bearings. The top two sides of the guide rail are symmetrically arranged with upper arc guide rails, and the two sides of the guide rail are symmetrically arranged with lower arc guide rails near the lower part of the upper arc guide rails. The upper arc guide rails and the upper bearing bearings are movably connected with upper steel balls, and the lower arc guide rails and the lower bearing bearings are movably connected with lower steel balls. The positioning mechanism includes fixed frames symmetrically arranged at both ends of the bottom side of the slider. Fixed blocks are symmetrically arranged at both ends of the internal side of the fixed frames, and support members are rotatably connected to both ends of the external side of the fixed frames via rotating shafts. A first spring is fixedly connected between the two fixed blocks, and a connecting rod is rotatably connected between the fixed blocks and the support members. A U-shaped mounting bracket is provided at one end of the support member relative to the fixed frame. A positioning block is movably connected to the inner side of the U-shaped mounting bracket via a rotating shaft, and a limiting unit is provided on the positioning block. Positioning grooves are symmetrically arranged on both sides of the bottom end of the guide rail, and one end of the positioning block slides into the positioning groove.

[0005] Preferably, the perpendicular line of the chord corresponding to the arc of the upper and lower circular arc guide rails is set at a 45° angle with the horizontal plane.

[0006] Preferably, both ends of the slider are provided with end caps, the side walls of the end caps are provided with protective baffles, and the outer side of the end face of the end cap is provided with an oil nozzle.

[0007] Preferably, a guide rod is fixedly connected inside the fixing frame, and the fixing block and the first spring are both sleeved on the outside of the guide rod.

[0008] Preferably, the support member includes a support arm and a support rod. One end of the support arm is movably connected to the fixed frame, and the other end of the support arm is provided with a sliding cavity. One end of the support rod is slidably fitted in the sliding cavity, and the other end of the support rod is fixedly connected to the U-shaped mounting frame. A fixing component is provided between the support arm and the support rod. The fixing component includes a fixing knob that is threadedly connected to the side wall of the support arm near one end of the support rod, and the side wall of the support rod is provided with a plurality of threaded holes facing the fixing knob.

[0009] Preferably, the limiting unit includes a plurality of first cavities arranged in a ring array within the positioning block. A second spring is installed in the middle of the interior of each of the first cavities. Two stops are symmetrically fixed at both ends of the second spring. A positioning head is connected to one end of each of the two stops relative to the second spring. Multiple sets of through holes communicating with the first cavities are symmetrically arranged in a ring array on the top and bottom sides of the positioning block. One end of the positioning head passes through the through hole and extends to the outside of the positioning block.

[0010] Preferably, the end of the positioning head is provided with a smooth transition structure.

[0011] Preferably, the slider has mounting holes at all four ends, and dustproof strips are provided on both inner edges of the bottom end of the slider.

[0012] Preferably, the end cap has an oil delivery channel communicating with the oil injector inside, both ends of which are connected to the lubricating oil channel inside the slider, and the end cap has an oil volume control structure.

[0013] Preferably, the oil volume control structure includes a second cavity groove disposed in the end cap, a third spring fixed at one end of the second cavity groove, a sliding plate connected to one end of the third spring, the sliding plate slidingly engaging in the second cavity groove, and a plug connected to one end of the sliding plate relative to the third spring, one end of the plug extending to the middle of the oil delivery channel and facing the fuel injector.

[0014] The technical effects and advantages provided by the present invention in the above technical solution are as follows: This invention, through the design of four rows of arc-shaped ball grooves and a 45° contact angle with the steel balls, can evenly bear the radial, anti-radial, and transverse and longitudinal loads and achieve automatic self-alignment. Furthermore, by setting four sets of pre-loaded clamping and positioning blocks between the bottom of the slider and the guide rail, the installation accuracy and running stability of the slider on the guide rail can be significantly improved, further suppressing the offset and vibration during the sliding process, providing precise positioning and guiding constraints for linear motion, and realizing high-precision and smooth sliding of the slider along the axis of the guide rail. Thus, it achieves dual protection of positioning accuracy and smooth motion in the linear transmission process. By setting support components on the positioning blocks, the support components are composed of support rods, support arms and fixing components. With the cooperation of this structure, the length of the support components can be quickly adjusted, and the extension range of the four sets of positioning blocks can be further adjusted according to positioning and installation requirements to meet the positioning adaptation requirements of guide rails of different specifications, the precise alignment requirements in complex installation scenarios and the usage scenarios of different preload adjustment. By setting a limiting unit, which consists of multiple sets of ring-shaped positioning heads that can be flexibly extended and retracted on the top and bottom sides of the positioning block, the gap between the positioning block and the positioning groove can be greatly reduced to ensure positioning reliability. It can also realize flexible floating adaptation and vibration buffering on the positioning contact surface, be compatible with minor installation errors and dynamic deviations, reduce friction loss, improve smoothness of movement, enhance the impact resistance of the positioning structure, and extend the overall service life. By incorporating an oil volume control structure within the end cap, the oil volume can be controlled by adjusting the diameter of the oil inlets on both sides during oil injection using oil pressure impacting the plug column. This allows for precise adjustment of the oil volume as needed, greatly improving the device's performance. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0016] Figure 1 This is one of the overall structural schematic diagrams of the present invention; Figure 2 This is the second schematic diagram of the overall structure of the present invention; Figure 3 This is a schematic diagram of the slider of the present invention; Figure 4 This is a schematic diagram of the guide rail structure of the present invention; Figure 5 This is a schematic diagram of the connection structure between the fixing frame and the positioning block of the present invention; Figure 6 This is a schematic diagram of the internal structure of the fixing frame of the present invention; Figure 7 This is a schematic diagram of the connection structure between the support arm and the support rod of the present invention; Figure 8 This is a schematic diagram of the connection structure between the support rod and the positioning block of the present invention; Figure 9 This is a longitudinal sectional view of the positioning block of the present invention; Figure 10 This is a schematic diagram of the internal structure of the end cap of the present invention.

[0017] Explanation of reference numerals in the attached figures: 1. Guide rail; 2. Slider; 3. End cap; 4. Injector nozzle; 5. Upper bearing; 6. Lower bearing; 7. Upper steel ball; 8. Lower steel ball; 9. Upper arc guide rail; 10. Lower arc guide rail; 11. Fixing bracket; 12. Fixing block; 13. First spring; 14. Connecting rod; 15. Support arm; 16. Support rod; 17. U-shaped mounting bracket; 18. Positioning block; 19. Fixing knob; 20. Slide cavity; 21. Threaded hole; 22. Positioning groove; 23. First cavity groove; 24. Second spring; 25. Stop block; 26. Positioning head; 27. Through hole; 28. Second cavity groove; 29. ​​Third spring; 30. Slide plate; 31. Plug; 32. Oil supply channel; 33. Mounting hole; 34. Guide rod. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," 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 invention. In this specification, 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.

[0020] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0021] like Figures 1-10 As shown, this invention provides a high-rigidity linear guide rail with self-aligning and four-way equal load capacity, including a guide rail 1, a slider 2 slidably mounted on the top of the guide rail 1; end caps 3 are provided at both ends of the slider 2, protective baffles are provided on the side walls of the end caps 3, and oil nozzles 4 are provided on the outer side of the end faces of the end caps 3; mounting holes 33 are provided at all four ends of the slider 2, and dustproof strips are provided on the two inner edges of the bottom end of the slider 2. Based on this, components can be easily assembled on the slider 2 through the mounting holes 33, dustproof strips can prevent dust from entering the slider 2 from the bottom, and oil supply can be connected through the oil nozzles 4. The device uses an oil pump and hose to draw lubricating oil into the nozzle 4, and then the nozzle 4 delivers it into the internal oil passage of the slider 2 to efficiently lubricate the bearing structure and the ball structure. Since the plug 31 extends into the oil delivery channel 32 and faces the nozzle 4, the plug 31 can block the oil inlets at both ends of the oil delivery channel 32. When the oil is sprayed, the oil rushes towards the plug 31, causing the plug 31 to drive the slide plate 30 to slide in the second cavity groove 28 and squeeze the third spring 29, thereby exposing the oil inlets on both sides. This allows the lubricating oil to flow smoothly into the slider 2 and act on the bearing structure and the ball structure through the lubricating oil passage.

[0022] For details on the transmission unit, please refer to [link / reference]. Figure 3 and Figure 4 As shown, the transmission unit includes two sets of upper bearing bearings 5 ​​symmetrically arranged on the top inner side of the slider 2, and two sets of lower bearing bearings 6 symmetrically arranged on the inner side of the slider 2 near the lower part of the upper bearing bearings 5. Upper arc guide rails 9 are symmetrically arranged on both sides of the top of the guide rail 1, and lower arc guide rails 10 are symmetrically arranged on both sides of the guide rail 1 near the lower part of the upper arc guide rails 9. Upper arc guide rails 9 and upper bearing bearings 5 ​​are movably connected by upper steel balls 7, and lower arc guide rails 10 and lower bearing bearings 6 are movably connected by lower steel balls 8. The perpendicular line of the chord corresponding to the arc of the upper arc guide rails 9 and the lower arc guide rails 10 is set at a 45° angle with the horizontal plane. Therefore, it can be seen that the present invention utilizes four rows of arc-shaped ball grooves (upper arc guide rail 9 and lower arc guide rail 10) and steel balls (upper steel ball 7 and lower steel ball 8), and with the steel balls having a 45° contact angle, so that the steel balls achieve an ideal two-point contact structure, which can withstand the same load capacity from four directions: radial, anti-radial, and transverse and longitudinal. Furthermore, by utilizing the elastic deformation of the steel balls and the transfer of contact points, it can automatically compensate for the assembly error of the mounting surface, generate self-aligning capability, and apply preload to improve rigidity when necessary.

[0023] Positioning mechanism, specifically by Figure 2 , Figure 5 and Figure 6It is understood that the positioning mechanism includes a fixed frame 11 symmetrically arranged at both ends of the bottom side of the slider 2. Fixed blocks 12 are symmetrically arranged at both ends of the inner side of the fixed frame 11, and support members are rotatably connected to both ends of the outer side of the fixed frame 11 via a rotating shaft. A first spring 13 is fixedly connected between the two fixed blocks 12, and a connecting rod 14 is rotatably connected between the fixed blocks 12 and the support members. A U-shaped mounting bracket 17 is provided at one end of the support member relative to the fixed frame 11. A positioning block 18 is movably connected to the inner side of the U-shaped mounting bracket 17 via a rotating shaft. Based on this, the support members pull the connecting rod 14 to rotate, causing the connecting rod 14 to drive the fixed blocks 12 to... The fixed frame 11 moves and stretches the first spring 13, causing the support member to open the two symmetrical positioning blocks 18 via the U-shaped mounting bracket 17. After the fixed frame 11 is fixedly installed on the bottom side of the slider 2, under the action of elasticity, the two sets of symmetrical positioning blocks 18 can be reset and synchronously pressed onto the guide rail 1. Since the positioning blocks 18 can always be subjected to an inward preload, the ends of the positioning blocks 18 can always be pressed against the positioning grooves 22. The positioning blocks 18 are provided with limiting units, and the bottom ends of the guide rail 1 are symmetrically provided with positioning grooves 22. One end of the positioning block 18 slides in the positioning groove 22. As can be seen from the above, by symmetrically arranging four sets of positioning blocks 18 at the bottom of the slider 2, and symmetrically arranging two sets of positioning grooves 22 matching the positioning blocks 18 on both sides of the bottom end of the guide rail 1, during installation, the connecting rod 14 is rotated by the support member, causing the connecting rod 14 to move the fixing block 12 within the fixing frame 11 and stretch the first spring 13. This allows the support member to drive the two symmetrical positioning blocks 18 to open through the U-shaped mounting bracket 17. After the fixing bracket 11 is fixedly installed on the bottom side of the slider 2, under the action of elasticity, the two symmetrical sets of positioning blocks 18 can be reset and synchronously pressed onto the guide rail 1. Furthermore, since the positioning blocks 18 can always... The pre-pressure applied to move inward ensures that the end of the positioning block 18 is always pressed against the positioning groove 22. Under the pre-pressure clamping of the four sets of positioning blocks 18, the installation accuracy and running stability of the slider 2 on the guide rail 1 can be significantly improved, further suppressing the offset and vibration during the sliding process. As the slider 2 slides on the guide rail 1, the positioning block 18 can slide accordingly, thereby continuously providing precise positioning and guiding constraints for the linear movement of the slider 2, realizing high-precision and smooth sliding of the slider 2 along the axial direction of the guide rail 1, so as to achieve dual protection of positioning accuracy and smooth movement during the linear transmission process.

[0024] The guide rod 34 is fixedly connected inside the fixing frame 11. The fixing block 12 and the first spring 13 are both sleeved on the guide rod 34. Based on this, the guide rod 34 can further support and limit the fixing block 12 and the first spring 13, thereby greatly ensuring the stability of the structure.

[0025] In one specific embodiment of the present invention, reference is made to... Figure 7As shown, the support includes a support arm 15 and a support rod 16. One end of the support arm 15 is movably connected to the fixed frame 11, and the other end of the support arm 15 is provided with a sliding cavity 20. One end of the support rod 16 is slidably fitted in the sliding cavity 20, and the other end of the support rod 16 is fixedly connected to the U-shaped mounting frame 17. A fixing component is provided between the support arm 15 and the support rod 16. As can be seen from the above, by the relative telescopic movement of the support rod 16 and the support arm 15, and with the cooperation of the fixing components, the support rod 16 and the support arm 15 can be locked and fixed, thereby quickly adjusting the length of the support component. Furthermore, the extension range of the four sets of positioning blocks 18 can be further adjusted according to positioning and installation requirements to meet the positioning adaptation requirements of guide rails 1 of different specifications, the precise alignment requirements in complex installation scenarios, and the usage scenarios of different preload adjustment.

[0026] The fixing component includes a fixing knob 19 that is threadedly connected to the side wall of the support arm 15 near the support rod 16. The side wall of the support rod 16 is provided with a plurality of threaded holes 21 facing the fixing knob 19. Based on this, by loosening the fixing knob 19 with a tool, the support rod 16 is pulled to slide back and forth in the sliding cavity 20. After it moves into place, the fixing knob 19 is tightened to tighten it in the threaded hole 21, so that the support rod 16 and the support arm 15 are locked and fixed. This allows for quick adjustment of the length of the support component, and further adjustment of the extension range of the four sets of positioning blocks 18 according to positioning and installation requirements.

[0027] In one specific embodiment of the present invention, specifically by Figure 8 and Figure 9 It is understood that the limiting unit includes multiple first cavities 23 arranged in a ring array within the positioning block 18. A second spring 24 is installed in the middle of the interior of each first cavity 23. Two stops 25 are symmetrically fixed to both ends of the second spring 24. A positioning head 26 is connected to one end of each stop 25 relative to the second spring 24. Multiple sets of through holes 27 communicating with the first cavities 23 are symmetrically arranged in a ring array on both the top and bottom sides of the positioning block 18. One end of the positioning head 26 passes through the through hole 27 and extends outside the positioning block 18. Therefore, when the positioning block 18 is embedded in the positioning groove 22, the positioning head 26 can be subjected to the force of the inner wall of the positioning groove 22. The compression is inserted into the through hole 27, and the upper and lower positioning heads 26 can drive the stop block 25 to slide in the first cavity groove 23 and squeeze the second spring 24. Under the reaction force of the second spring 24, the smooth ends of the upper and lower multiple sets of positioning heads 26 can press against the top and bottom sides of the inner wall of the positioning groove 22. Under the action of this structure, not only can the gap between the positioning block 18 and the positioning groove 22 be greatly reduced, ensuring tight fit and positioning reliability, but also flexible floating adaptation and vibration buffering on the positioning contact surface can be realized, so as to better accommodate the small errors of the mounting surface of the guide rail 1 and the dynamic deviation of the slider 2 during the sliding process.

[0028] The end of the positioning head 26 is designed with a smooth transition structure. Based on this, the friction coefficient can be greatly reduced through the smooth transition structure design, ensuring smooth sliding.

[0029] As can be seen from the above, by setting a limiting unit on the positioning block 18, the limiting unit includes positioning heads 26 arranged in an upper and lower ring array at the top and bottom of the positioning block 18. When the positioning block 18 is embedded in the positioning groove 22, the positioning heads 26 can be squeezed into the through hole 27 by the inner wall of the positioning groove 22. The upper and lower positioning heads 26 can drive the stop block 25 to slide in the first cavity groove 23 and squeeze the second spring 24. Under the reaction force of the second spring 24, the smooth ends of the upper and lower multiple sets of positioning heads 26 can be pressed against the top and bottom sides of the inner wall of the positioning groove 22. Under the action of this structure, not only can the gap between the positioning block 18 and the positioning groove 22 be greatly reduced, ensuring tight fit and positioning reliability, but also flexible floating adaptation and vibration buffering on the positioning contact surface can be realized, so as to better accommodate the small errors of the mounting surface of the guide rail 1 and the dynamic deviation of the slider 2 during the sliding process, greatly reduce sliding friction loss, improve the smoothness of movement, and enhance the impact resistance and service life of the positioning structure.

[0030] In one specific embodiment of the present invention, reference is made to... Figure 10 As shown, the end cap 3 has an oil delivery channel 32 communicating with the fuel injector 4 inside. Both ends of the oil delivery channel 32 are connected to the lubricating oil passages in the slider 2. The end cap 3 also has an oil volume control structure. The oil volume control structure includes a second cavity 28 inside the end cap 3. A third spring 29 is fixed to one end of the second cavity 28. One end of the third spring 29 is connected to a sliding plate 30. The sliding plate 30 is slidably fitted in the second cavity 28. A plug 31 is connected to one end of the sliding plate 30 relative to the third spring 29. One end of the plug 31 extends to the middle of the oil delivery channel 32 and faces the fuel injector 4. Thus, the plug 31 extends into the oil delivery channel 32 and faces the fuel injector 4, and the plug 31 can block... When oil is sprayed, the oil rushes towards the plug 31 at both ends of the oil supply channel 32. This causes the plug 31 to drive the slide plate 30 to slide in the second cavity groove 28 and squeeze the third spring 29, thereby exposing the oil inlets on both sides. This allows the lubricating oil to flow smoothly into the slide plate 2 and act on the bearing structure and the steel ball structure through the lubricating oil channel in the slide plate 2. By controlling the oil spraying pressure of the nozzle 4 (which is a current technology and will not be described in detail), the impact force on the plug 31 can be adjusted. The greater the impact force, the larger the opening diameter of the oil inlets on both sides, thereby increasing the oil intake. Conversely, the oil intake can be reduced by controlling the oil intake. This allows for precise adjustment of the oil volume as needed, greatly improving the actual performance of the device.

[0031] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A high-rigidity linear guide rail with self-aligning and four-way equal load capacity, characterized in that, include: Guide rail (1), with a slider (2) slidably mounted on the top of the guide rail (1); The transmission unit includes two sets of upper bearing bearings (5) symmetrically arranged on the top of the inner side of the slider (2), and two sets of lower bearing bearings (6) symmetrically arranged on the inner side of the slider (2) near the lower part of the upper bearing bearings (5). The top of the guide rail (1) is symmetrically arranged with upper arc guide rails (9) on both sides, and lower arc guide rails (10) are symmetrically arranged on both sides of the guide rail (1) near the lower part of the upper arc guide rails (9). The upper arc guide rails (9) and the upper bearing bearings (5) are movably connected with upper steel balls (7), and the lower arc guide rails (10) and the lower bearing bearings (6) are movably connected with lower steel balls (8). The positioning mechanism includes a fixed frame (11) symmetrically arranged at both ends of the bottom side of the slider (2). The fixed frame (11) has fixed blocks (12) symmetrically arranged at both ends inside. The fixed frame (11) has a support member rotatably connected to both ends of the outside through a rotating shaft. A first spring (13) is fixedly connected between the two fixed blocks (12). A connecting rod (14) is rotatably connected between the fixed block (12) and the support member. A U-shaped mounting bracket (17) is provided at one end of the support member relative to the fixed frame (11). A positioning block (18) is movably connected to the inner side of the U-shaped mounting bracket (17) through a rotating shaft. A limiting unit is provided on the positioning block (18). Positioning grooves (22) are symmetrically arranged on both sides of the bottom end of the guide rail (1). One end of the positioning block (18) is slidably engaged in the positioning groove (22).

2. The high-rigidity linear guide rail with self-aligning and four-way equal load capacity according to claim 1, characterized in that: The vertical line of the chord corresponding to the arc of the upper circular arc guide rail (9) and the lower circular arc guide rail (10) is set at a 45° angle with the horizontal plane.

3. A high-rigidity linear guide rail with self-aligning and four-way equal load capacity according to claim 1, characterized in that: Both ends of the slider (2) are provided with end caps (3), the side walls of the end caps (3) are provided with protective baffles, and the outer side of the end face of the end caps (3) is provided with an oil nozzle (4).

4. A high-rigidity linear guide rail with self-aligning and four-way equal load capacity according to claim 1, characterized in that: The guide rod (34) is fixedly connected inside the fixing frame (11), and the fixing block (12) and the first spring (13) are both sleeved on the outside of the guide rod (34).

5. A high-rigidity linear guide rail with self-aligning and four-way equal load capacity according to claim 1, characterized in that: The support includes a support arm (15) and a support rod (16). One end of the support arm (15) is movably connected to the fixed frame (11), and the other end of the support arm (15) is provided with a sliding cavity (20). One end of the support rod (16) is slidably fitted in the sliding cavity (20), and the other end of the support rod (16) is fixedly connected to the U-shaped mounting frame (17). A fixing component is provided between the support arm (15) and the support rod (16). The fixing component includes a fixing knob (19) that is threadedly connected to the side wall of the support arm (15) near the support rod (16), and the side wall of the support rod (16) is provided with a plurality of threaded holes (21) facing the fixing knob (19).

6. A high-rigidity linear guide rail with self-aligning and four-way equal load capacity according to claim 1, characterized in that: The limiting unit includes a plurality of first cavities (23) arranged in a ring array within the positioning block (18). A second spring (24) is installed in the middle of the interior of the first cavity (23). Two stops (25) are symmetrically fixed at both ends of the second spring (24). A positioning head (26) is connected to one end of each of the two stops (25) relative to the second spring (24). The top and bottom sides of the positioning block (18) are symmetrically arranged in a ring array with a plurality of through holes (27) communicating with the first cavity (23). One end of the positioning head (26) passes through the through hole (27) and extends to the outside of the positioning block (18).

7. A high-rigidity linear guide rail with self-aligning and four-way equal load capacity according to claim 6, characterized in that: The end of the positioning head (26) is designed with a smooth transition structure.

8. A high-rigidity linear guide rail with self-aligning and four-way equal load capacity according to claim 1, characterized in that: The slider (2) has mounting holes (33) at all four ends, and dustproof strips are provided on both inner edges of the bottom end of the slider (2).

9. A high-rigidity linear guide rail with self-aligning and four-way equal load capacity according to claim 3, characterized in that: The end cap (3) has an oil delivery channel (32) that communicates with the oil injector (4) inside. Both ends of the oil delivery channel (32) are connected to the lubricating oil channel in the slider (2), and the end cap (3) has an oil quantity control structure.

10. A high-rigidity linear guide rail with self-aligning and four-way equal load capacity according to claim 9, characterized in that: The oil volume control structure includes a second cavity (28) located in the end cap (3). A third spring (29) is fixed at one end of the second cavity (28). A sliding plate (30) is connected to one end of the third spring (29). The sliding plate (30) is slidably fitted in the second cavity (28). A plug (31) is connected to one end of the sliding plate (30) relative to the third spring (29). One end of the plug (31) extends to the middle of the inside of the oil delivery channel (32) and faces the fuel injector (4).

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