Linear guide rail sliding block

Abstract

The invention provides a linear guide rail sliding block, which belongs to the technical field of linear guide rails and comprises a sliding block body, an end cover and a sealing cover, a mounting groove is formed in the sliding block body, and a first sliding groove and a second sliding groove are formed in the mounting groove; a first through hole and a second through hole are formed in the sliding block body, a first connecting hole and a first guide hole are formed in one side of the end cover, a second connecting hole and a second guide hole are formed in the other side of the end cover, a first circulating flow channel and a second circulating flow channel are formed in the end cover, and the first sliding groove, the first through hole and the first circulating flow channel form two first circulating channels. The second sliding groove, the second through hole and the second circulating flow channel form two second circulating passages; and four adding holes are formed in the end cover and are communicated with the first circulating flow channel and the second circulating flow channel. According to the linear guide rail sliding block provided by the invention, the number of required balls is reduced, and the weight of the whole linear guide rail sliding block is reduced; and the adding difficulty of the balls is reduced, and the mounting speed of the linear guide rail sliding block is increased.

Description

Technical Field

[0001] The invention belongs to the technical field of linear guide rails, and more specifically, relates to a linear guide rail slider. Background Art

[0002] Linear guide slider mechanisms are widely used in domestic CNC machine tool manufacturing and other industries. In the current linear guide slider mechanisms, when the guide rail and the slider make relative linear motion, the ball rolls along the slide on the guide rail and moves repeatedly in the ball slide, thereby satisfying the accurate movement of the slider on the guide rail.

[0003] In the existing slider, four independent circulation paths are symmetrically arranged, and multiple balls are installed in each circulation path, so that the slider and the guide rail can move relative to each other smoothly and accurately through the balls in the four circulation paths. This ball installation structure can reliably realize the matching installation of the slider and the guide rail, but the number of balls required is large, and the four circulation paths require a sufficient number of balls to work, resulting in a slow ball installation speed and a large overall weight of the slider. Summary of the invention

[0004] The object of the present invention is to provide a linear guide slider to solve the technical problems existing in the prior art that the ball installation speed is slow and the overall weight of the slider is large.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide a linear guide slider, including a slider body, two end covers respectively fixedly installed at two ends of the slider body and four sealing covers; a through mounting groove is provided in the slider body, and the mounting groove is used to cooperate with the linear guide for installation; two first slide grooves and two second slide grooves are provided on the left and right sides of the inner wall of the mounting groove; a through first through hole and a second through hole are provided on the slider body, and the first through hole and the second through hole are respectively located on both sides of the mounting groove; the first through hole and the two first slide grooves are located on one side of the slider body, and the second through hole and the two second slide grooves are located on the other side of the slider body; a first connecting hole and two first guide holes are provided on one side of the side of the end cover close to the slider body, and a second connecting hole and two second guide holes are provided on the other side of the side of the end cover close to the slider body, and the first connecting hole and the two first guide holes are respectively connected to the first through hole and the two The first sliding grooves correspond to the first sliding grooves, and the second connecting hole and the two second guide holes correspond to the second through holes and the two second sliding grooves respectively; two first circulation flow channels and two second circulation flow channels are arranged inside the end cover, and the two first circulation flow channels are used to connect the first connecting hole and the two first guide holes, and the two second circulation flow channels are used to connect the second connecting hole and the two second guide holes; the two first sliding grooves, the first through holes, and the four first circulation flow channels form two first circulation passages for the movement of the balls, and the two second sliding grooves, the second through holes, and the four second circulation flow channels form two second circulation passages for the movement of the balls; four adding holes are also arranged on the side of the end cover away from the slider body, and the four adding holes are respectively connected to the two first circulation flow channels and the two second circulation flow channels on the end cover, and the four sealing covers are respectively blocked in the four adding holes and are detachably connected to the end cover.

[0006] In a possible implementation, extended arc groove sections are provided on the inner hole walls of the two first guide holes at both ends of the first connecting hole, and extended arc groove sections are provided on the inner hole walls of the two second guide holes at both ends of the second connecting hole; the extended arc groove section is an arc-shaped bending structure arranged along the length direction of the first connecting hole or the second connecting hole, and the distance between the extended arc groove section and the central axis of the first connecting hole or the second connecting hole increases and then decreases from the inside to the outside.

[0007] In a possible implementation, the end of the first connecting hole away from the first through hole has a tapered hole section opening outward, the end of the second connecting hole away from the second through hole has a tapered hole section opening outward, and the extended arc groove section is opened on the inner hole wall of the tapered hole.

[0008] In a possible implementation, a side of the extended arc-shaped slot segment close to the opening of the first connecting hole is provided with a plurality of raised portions arranged along the length direction of the extended arc-shaped slot segment, and the heights of the plurality of raised portions gradually increase.

[0009] In a possible implementation, the plurality of protrusions have an inclined surface for guiding the balls to move outward.

[0010] In a possible implementation, the distance between the center of the first connecting hole and the centers of the two first guide holes is equal; the distance between the center of the second connecting hole and the centers of the two second guide holes is equal.

[0011] In a possible implementation, an oiling nozzle and a lubricating oil channel are also provided on the end cover away from the adding hole, and the lubricating oil channel is provided with an oil inlet and four oil outlets, and the oil inlet is connected to the oiling nozzle; the four oil outlets are respectively connected to the two first circulation channels and the two second circulation channels on the end cover.

[0012] In a possible implementation, an internal thread section is provided on the inner wall of the addition hole, and an external thread section is provided on the sealing cover to be mounted in cooperation with the internal thread section; the sealing cover is mounted on one end of the addition hole and has an arc-shaped concave surface; the arc-shaped concave surface is aligned with the orifice of the addition hole, and the center of the arc-shaped concave surface coincides with the center of the corresponding arc-shaped section of the first circulation channel or the second circulation channel.

[0013] In one possible implementation, the adding hole is a countersunk hole, the sealing cover includes a connecting rod and a limit plate fixedly mounted on the connecting rod, the external thread section is opened on the connecting rod, the arc-shaped concave surface is arranged at one end of the connecting rod away from the limit plate, and the limit plate is cooperatively mounted in the countersunk hole.

[0014] The beneficial effect of the linear guide slider provided by the present invention is that: compared with the prior art, the linear guide slider of the present invention, the two first slide grooves located in the slider body, the first through hole and the first connecting hole on the end cover, the first circulation channel and the two first guide holes constitute two first circulation passages with an intersection, wherein the first through hole on the slider body is a common area for the two first circulation passages; and the two second slide grooves, the second through hole and the second connecting hole on the end cover, the second circulation channel and the two second guide holes located in the slider body constitute two second circulation passages with an intersection, wherein the second through hole on the slider body is a common area for the two second circulation passages, and the working length of the two first circulation passages The length of a first through hole and the working length of two second circulation passages are reduced, and the length of a second through hole is reduced, so the installed balls do not need to fill the reduced lengths of the first through hole and the second through hole, thereby reducing the number of required balls and reducing the weight of the entire linear guide slider; when assembling the linear guide slider, a retaining frame is installed in the slider body, and end covers are fixedly installed at both ends of the slider body, and the sealing plate is opened to add balls from the four adding holes toward the two first circulation passages and the two second circulation passages, and after a sufficient number of balls are loaded, the sealing plate is used to seal the adding holes; the difficulty of adding balls is reduced, and the installation speed of the linear guide slider is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 A schematic diagram of the structure of a linear guide slider provided in an embodiment of the present invention;

[0017] Figure 2 A schematic diagram of the structure of a slider body provided in an embodiment of the present invention;

[0018] Figure 3 The structure of the end cover provided by the embodiment of the present invention is shown in FIG. Figure 1 ;

[0019] Figure 4 The structure of the end cover provided by the embodiment of the present invention is shown in FIG. Figure 2 ;

[0020] Figure 5 A schematic diagram of the structure of two first circulation paths provided in an embodiment of the present invention;

[0021] Figure 6A schematic diagram of the structure of two second circulation paths provided in an embodiment of the present invention;

[0022] Figure 7 A schematic structural diagram of a first connecting hole and an extended arc-shaped slot segment provided in an embodiment of the present invention;

[0023] Figure 8 A schematic diagram of the positional relationship between the first connecting hole, the first guiding hole and the adding hole provided in an embodiment of the present invention;

[0024] Fig. 9 A top view of a linear guide slider provided in an embodiment of the present invention

[0025] Fig.10 A schematic structural diagram of a sealing cover provided in an embodiment of the present invention.

[0026] Among them, the reference numerals in the figure are:

[0027] 1. Slider body; 11. Mounting groove; 12. First slide groove; 13. Second slide groove; 14. First through hole; 15. Second through hole;

[0028] 2. End cover; 21. First connecting hole; 22. First guide hole; 23. Second connecting hole; 24. Second guide hole; 25. First circulation channel; 26. Second circulation channel; 27. Adding hole; 28. Oiling nozzle;

[0029] 3. Sealing cover; 31. Connecting rod; 32. Limiting plate; 33. External thread section; 34. Arc-shaped concave surface;

[0030] 4. Extended arc groove section; 41. Conical hole. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0032] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0033] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0035] See also Figures 1 to 10, the linear guide slider provided by the present invention is now described. A linear guide slider comprises a slider body 1, two end covers 2 respectively fixedly mounted on both ends of the slider body 1, and four sealing covers 3; a through mounting groove 11 is provided in the slider body 1, and the mounting groove 11 is used for mounting in cooperation with the linear guide; two first slide grooves 12 and two second slide grooves 13 are provided on the left and right sides of the inner wall of the mounting groove 11; a through first through hole 14 and a second through hole 15 are provided on the slider body 1, and the first through hole 14 and the second through hole 15 are respectively located on both sides of the mounting groove 11; the first through hole 14 and the two first slide grooves 12 are located on one side of the slider body 1, and the second through hole 15 and the two second slide grooves 13 are located on the other side of the slider body 1; a first connecting hole 21 and two first guide holes 22 are provided on one side of the side of the end cover 2 close to the slider body 1, and a second connecting hole 23 and two second guide holes 24 are provided on the other side of the side of the end cover 2 close to the slider body 1, and the first connecting hole 21 and the two first guide holes 22 are respectively connected to the first through hole 14 and the two first slide grooves 12 corresponds to the second connecting hole 23 and the two second guide holes 24 respectively correspond to the second through hole 15 and the two second slide grooves 13; two first circulation channels 25 and two second circulation channels 26 are arranged inside the end cover 2, the two first circulation channels 25 are used to connect the first connecting hole 21 and the two first guide holes 22, and the two second circulation channels 26 are used to connect the second connecting hole 23 and the two second guide holes 24; the two first slide grooves 12, the first through hole 14, and the four first circulation channels 25 form two first circulation passages for the movement of the ball, and the two second slide grooves 13, the second through hole 15, and the four second circulation channels 26 form two second circulation passages for the movement of the ball; four adding holes 27 are also arranged on the side of an end cover 2 away from the slider body 1, and the four adding holes 27 are respectively connected to the two first circulation channels 25 and the two second circulation channels 26 on the end cover 2, and the four sealing covers 3 are respectively blocked in the four adding holes 27 and are detachably connected to the end cover 2.

[0036] Compared with the prior art, the linear guide slider provided by the present invention comprises two first chute grooves 12, a first through hole 14, a first connecting hole 21, a first circulation channel 25 and two first guide holes 22 located in the slider body 1, which form two first circulation passages with intersections, wherein the first through hole 14 on the slider body 1 is a region shared by the two first circulation passages; and two second chute grooves 13, a second through hole 15, a second connecting hole 23, a second circulation channel 26 and two second guide holes 24 located in the slider body 1, which form two second circulation passages with intersections, wherein the second through hole 15 on the slider body 1 is a region shared by the two second circulation passages, and the working lengths of the two first circulation passages are reduced. The length of the first through hole 14 is reduced, and the working length of the two second circulation passages is reduced by the length of the second through hole 15. Therefore, the installed balls do not need to fill the reduced lengths of the first through hole 14 and the second through hole 15, which reduces the number of required balls and reduces the weight of the entire linear guide slider. When assembling the linear guide slider, a retaining frame is installed in the slider body 1, and the end covers 2 are fixedly installed at both ends of the slider body 1. The sealing plate is opened and the balls are added from the four adding holes 27 toward the two first circulation passages and the two second circulation passages respectively. After a sufficient number of balls are loaded, the sealing plate is used to seal the adding holes 27. The difficulty of adding balls is reduced and the installation speed of the linear guide slider is improved.

[0037] See also Figures 4 to 7As a specific embodiment of the linear guide slider provided by the present invention, an extended arc groove section 4 is provided on the inner hole wall near the two first guide holes 22 at both ends of the first connecting hole 21, and an extended arc groove section 4 is provided on the inner hole wall near the two second guide holes 24 at both ends of the second connecting hole 23; the extended arc groove section 4 is an arc-shaped bending structure arranged along the length direction of the first connecting hole 21 or the second connecting hole 23, and the distance between the extended arc groove section 4 and the central axis of the first connecting hole 21 or the second connecting hole 23 increases from the inside to the outside and then decreases; with the help of the two extended arc groove sections 4 at the ends of the first connecting hole 21 The width of the balls when entering the first circulation channel 25 from the first connection hole 21 is increased, and when the balls enter the first connection hole 21 near one end of the first circulation channel 25, after the front ball enters one extended arc groove section 4, the rear ball enters another extended arc groove section 4, so that after the front ball passes through one extended arc groove section 4 and enters the corresponding first circulation channel 25, the rear ball enters the corresponding other first circulation channel 25 along the other extended arc groove section 4 due to the action of inertia and the limiting action of the extended arc groove section 4 on the ball. In this way, multiple balls that move continuously successively enter the two first circulation channels 25 one after another, and then enter the two first chutes 12 respectively; it is ensured that there are sufficient balls in the two first chutes 12 that are in direct contact with the linear guide.

[0038] Similarly, the width of the ball when entering the second circulation channel 26 from the second connection hole 23 is increased by means of the two extended arc groove sections 4 at the end of the second connection hole 23, and when the ball enters the end of the second connection hole 23 close to the second circulation channel 26, after the front ball enters one extended arc groove section 4, the rear ball enters another extended arc groove section 4, so that after the front ball passes through one extended arc groove section 4 and enters the corresponding second circulation channel 26, the rear ball enters the corresponding other second circulation channel 26 along the other extended arc groove section 4 due to the action of inertia and the limiting action of the extended arc groove section 4 on the ball. In this way, multiple continuously moving balls successively enter the two second circulation channels 26, and then enter the two first chutes 12 respectively; ensuring that there are sufficient balls in the two second chutes 13 that are in direct contact with the linear guide.

[0039] At the same time, the extended arcuate slot section 4 is a bent structure, so that the balls entering the extended arcuate slot section 4 first move inward and outward along the length direction of the extended arcuate slot section 4, so that the balls at the rear can smoothly enter another extended arcuate slot section 4.

[0040] See also Figure 7As a specific embodiment of the linear guide slider provided by the present invention, the end of the first connecting hole 21 away from the first through hole 14 has a tapered hole 41 section opening outward, the end of the second connecting hole 23 away from the second through hole 15 has a tapered hole 41 section opening outward, and the extended arc groove section 4 is opened on the inner hole wall of the tapered hole 41; the first connecting hole 21 is provided with a tapered hole 41 section at one end away from the first through hole 14, and the extended arc groove section 4 is opened on the inner wall of the tapered hole 41 section, so that the ball can move more smoothly in the extended arc groove section 4 and smoothly enter the corresponding first circulation channel 25.

[0041] As a specific embodiment of the linear guide slider provided by the present invention, a plurality of protrusions arranged along the length direction of the extended arc groove section 4 are provided on one side of the opening of the first connecting hole 21, and the heights of the plurality of protrusions gradually increase; after the ball enters the extended arc groove section 4, it gradually moves forward and upward under the action of the plurality of protrusions, so that it can smoothly escape from the extended arc groove section 4 and enter the corresponding first circulation channel 25. The heights of the plurality of protrusions are successively increased, so that the ball enters the first circulation channel 25 from the first connecting hole 21 more quickly and smoothly.

[0042] As a specific embodiment of the linear guide slider provided by the present invention, multiple protrusions are provided with inclined surfaces for guiding the balls to move outward; the inclined surfaces enable the balls to move better in the extended arc groove segment 4, and the movement along the inclined surfaces has a guiding effect and is more accurate.

[0043] See also Figures 1 to 4 , Figure 8 As a specific embodiment of the linear guide slider provided by the present invention, the distance between the center of the first connecting hole 21 and the center of the two first guide holes 22 is equal; the distance between the center of the second connecting hole 23 and the center of the two second guide holes 24 is equal; therefore, the spacing between the first connecting hole 21 and the two first guide holes 22 is equal, so in the process of the ball entering from the first connecting hole 21 to the two first guide holes 22, the distance moved is equal, so that multiple balls can enter the two first circulation paths more evenly.

[0044] The second connecting hole 23 and the two second guide holes 24 are spaced at equal distances, so that when the balls enter from the second connecting hole 23 to the two second guide holes 24, the distances they move are equal, so that multiple balls can enter the two second circulation paths more evenly.

[0045] See also Figure 1 and Fig. 9As a specific embodiment of the linear guide slider provided by the present invention, an oiling nozzle 28 and a lubricating oil channel are also provided on the end cover 2 away from the adding hole 27, and the lubricating oil channel is provided with an oil inlet and four oil outlets, and the oil inlet is connected to the oiling nozzle 28; the four oil outlets are respectively connected to the two first circulation flow channels 25 and the two second circulation flow channels 26 on the end cover 2; a lubricating oil channel is arranged inside one of the end covers 2, and the lubricating oil channel includes an oil inlet and four oil outlets, and the four oil outlets are respectively connected to the two first circulation flow channels 25 and the two second circulation flow channels 26, and the oil inlet is located at one end of the end cover 2 away from the slider body 1, and the oiling nozzle 28 is installed on the end cover 2 and connected to the oil inlet.

[0046] When in use, lubricating oil or grease is added to the oiling nozzle 28, and the lubricating oil or grease enters the lubrication channel through the oil inlet and enters the two first circulation channels 25 and the two second circulation channels 26 from the oil outlet, so that the balls in the two first circulation channels and the two second circulation channels can be wrapped by the oil film and move smoothly.

[0047] See also Figure 1 , Figure 3 , Figure 4 and Fig.10 As a specific embodiment of the linear guide slider provided by the present invention, an internal thread section is provided on the inner wall of the adding hole 27, and an external thread section 33 is provided on the sealing cover 3 to be installed in cooperation with the internal thread section; the sealing cover 3 is installed at one end of the adding hole 27 and has an arc-shaped concave surface 34; the arc-shaped concave surface 34 is aligned with the orifice of the adding hole 27, and the center of the arc-shaped concave surface 34 coincides with the center of the arc section of the corresponding first circulation channel 25 or the second circulation channel 26; the arc-shaped concave surface 34 at one end of the sealing cover 3 is aligned with the orifice of the adding hole 27, and the arc-shaped concave surface 34 is filled in the intersection of the first circulation channel 25, the second circulation channel 26 and the adding hole 27, so that the inner walls of the first circulation channel 25 and the second circulation channel 26 are complete and without defects, ensuring that the balls can move smoothly in the first circulation channel 25 and the second circulation channel 26.

[0048] The sealing cover 3 is provided with a hollow hole extending through the sealing cover 3 along its length, and a lubricating rod is provided in the hollow hole. One end of the lubricating rod enters the first circulation channel 25 or the second circulation channel 26 from the hollow hole, thereby adding lubricating oil to the ball bearings.

[0049] See also Figure 1 , Figure 3 , Figure 4 and Fig.10As a specific embodiment of the linear guide slider provided by the present invention, the adding hole 27 is a countersunk hole, the sealing cover 3 includes a connecting rod 31 and a limiting plate 32 fixedly installed on the connecting rod 31, the external thread section 33 is provided on the connecting rod 31, the arc-shaped concave surface 34 is provided at one end of the connecting rod 31 away from the limiting plate 32, and the limiting plate 32 is installed in the countersunk hole in cooperation; the connecting rod 31 and the limiting plate 32 form a stepped shaft shape, when installing the sealing cover 3, the staff inserts the connecting rod 31 into the adding hole 27 and is threadedly connected with the adding hole 27, and after the arc-shaped concave surface 34 and the first circulation channel 25, the second circulation channel 26 and the adding hole 27 are installed in cooperation, the limiting plate 32 enters the countersunk hole to complete the installation of the sealing cover 3. The limiting plate 32 is provided with an operation port for installing the sealing cover 3.

[0050] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A linear guide slider, characterized in that: The invention comprises a slider body, two end covers respectively fixedly mounted at both ends of the slider body and four sealing covers; a through mounting groove is arranged in the slider body, and the mounting groove is used for mounting in cooperation with the linear guide rail; two first slide grooves and two second slide grooves are arranged on the left and right sides of the inner wall of the mounting groove; a through first through hole and a second through hole are arranged on the slider body, and the first through hole and the second through hole are respectively located on the two sides of the mounting groove; the first through hole and the two first slide grooves are located on one side of the slider body, and the second through hole and the two second slide grooves are located on the other side of the slider body; the end cover is opened on one side close to the side of the slider body A first connecting hole and two first guide holes are provided, and a second connecting hole and two second guide holes are provided on the other side of the side of the end cover close to the slider body, the first connecting hole and the two first guide holes correspond to the first through hole and the two first slide grooves respectively, and the second connecting hole and the two second guide holes correspond to the second through hole and the two second slide grooves respectively; two first circulation flow channels and two second circulation flow channels are provided inside the end cover, the two first circulation flow channels are used to connect the first connecting hole and the two first guide holes, and the two second circulation flow channels are used to connect the second connecting hole and the two second guide holes; The two first chute grooves, the first through holes, and the four first circulation channels form two first circulation channels for the movement of the balls, and the two second chute grooves, the second through holes, and the four second circulation channels form two second circulation channels for the movement of the balls; Four adding holes are also provided on the side of one end cover away from the slider body, and the four adding holes are respectively connected to the two first circulation channels and the two second circulation channels on the end cover, and the four sealing covers are respectively sealed in the four adding holes and are detachably connected to the end cover.

2. The linear guide slider according to claim 1, characterized in that: Extended arc groove sections are provided on the inner hole walls of the two first guide holes at both ends of the first connecting hole, and extended arc groove sections are provided on the inner hole walls of the two second guide holes at both ends of the second connecting hole; the extended arc groove section is an arc-shaped bending structure arranged along the length direction of the first connecting hole or the second connecting hole, and the distance between the extended arc groove section and the central axis of the first connecting hole or the second connecting hole increases and then decreases from the inside to the outside.

3. The linear guide slider according to claim 2, characterized in that: The end of the first connecting hole away from the first through hole has a tapered hole section opening outward, the end of the second connecting hole away from the second through hole has a tapered hole section opening outward, and the extended arc groove section is opened on the inner hole wall of the tapered hole.

4. The linear guide slider according to claim 2, characterized in that: A side of the extended arc-shaped slot segment close to the opening of the first connecting hole is provided with a plurality of protrusions arranged along the length direction of the extended arc-shaped slot segment, and the heights of the plurality of protrusions gradually increase.

5. The linear guide slider according to claim 4, characterized in that: The plurality of protrusions are provided with inclined surfaces for guiding the balls to move outwards.

6. The linear guide slider according to claim 1, characterized in that: The distance between the center of the first connecting hole and the centers of the two first guide holes is equal; the distance between the center of the second connecting hole and the centers of the two second guide holes is equal.

7. The linear guide slider according to claim 6, characterized in that: An oiling nozzle and a lubricating oil channel are also provided on the end cover away from the adding hole. The lubricating oil channel is provided with an oil inlet and four oil outlets. The oil inlet is connected to the oiling nozzle; the four oil outlets are respectively connected to the two first circulation channels and the two second circulation channels on the end cover.

8. The linear guide slider according to claim 1, characterized in that: An internal thread section is provided on the inner wall of the addition hole, and an external thread section is provided on the sealing cover to be installed in cooperation with the internal thread section; the sealing cover is installed on one end of the addition hole and has an arc-shaped concave surface; the arc-shaped concave surface is aligned with the orifice of the addition hole, and the center of the arc-shaped concave surface coincides with the center of the corresponding arc section of the first circulation channel or the second circulation channel.

9. The linear guide slider according to claim 8, characterized in that: The adding hole is a countersunk hole, the sealing cover includes a connecting rod and a limiting plate fixedly installed on the connecting rod, the external thread section is opened on the connecting rod, the arc-shaped concave surface is arranged at one end of the connecting rod away from the limiting plate, and the limiting plate is installed in the countersunk hole.

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