A linear slide

Abstract

The application discloses a linear slide rail, which comprises a hollow rail and a sliding block sliding in the hollow rail, wherein the cross-sectional shape of the hollow rail is a polygon with an even number of edges, and a supporting opening is arranged on the hollow rail; the sliding block comprises a main body and at least two plane supporting bearings arranged along the length direction of the main body, the plane supporting bearings are installed between the two symmetrical edges of the hollow rail, and the diameter value of the plane supporting bearings is smaller than the interval value of the two symmetrical edges of the hollow rail. The linear slide rail disclosed by the application is characterized in that the diameter value of the plane supporting bearings is smaller than the interval value of the two symmetrical edges of the hollow rail, so that a gap is left between the sliding block and the rail when the sliding block slides, and space is provided for adjustment when the sliding block encounters a turning part or an obstacle of the rail, so that the sliding block can overcome the defects and obstacles when moving on the rail, the turning of the sliding block is facilitated, the flexibility of the sliding block is improved, and the problem of poor operation is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of slide rails, in particular to a linear slide rail. Background Art

[0002] Slide rails, as a structure that reduces resistance and facilitates sliding, are widely used in people's daily lives. Slide rails on the market are composed of two parts: a slider and a slideway. The slider carries the weight and is stuck in the slideway. The slideway's support overcomes the weight of the weight. When moving the weight, you only need to push and pull the slider in the direction of movement, which saves effort. Generally, the slider on the slide rail is equipped with a pulley that is locked in the slideway to maintain the slider's stability. Lubricating oil is also applied to the pulley to further reduce friction between the pulley and the slideway, thereby reducing frictional resistance.

[0003] However, as the use scenarios of slide rails increase, sometimes the length of the slide rail is required to be very long. In order to facilitate manufacturing and transportation, the slide rail can only be divided into sections and then spliced ​​and assembled when in use. Obstacles are inevitable at the splicing points due to physical contact; sometimes the position of heavy objects needs to be changed on a plane or even in three-dimensional space, so the slide rail needs to be bent into an arc; when the slider passes through an obstacle or a curved track, the pulley is restricted and can only move along the length of the track, so it has the defect of insufficient flexibility, which can easily lead to problems with poor operation.

[0004] Therefore, the existing technology still needs to be improved and developed. Summary of the Invention

[0005] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide a linear slide rail, aiming to solve the problem that the slider on the slide rail is not flexible enough, resulting in poor operation during the movement of heavy objects.

[0006] The technical solutions of the present invention are as follows:

[0007] A linear slide rail, comprising a hollow track and a slider sliding in the hollow track, wherein the cross-sectional shape of the hollow track is a polygon with an even number of sides, and a support opening is provided on the hollow track; the slider comprises a main body and at least two planar support bearings arranged along the length direction of the main body, the planar support bearings being installed between two symmetrical sides of the hollow track, and the diameter value of the planar support bearing is smaller than the spacing value between the two symmetrical sides on the hollow track.

[0008] The linear slide rail, wherein the cross-sectional shape of the hollow track is rectangular, the hollow track is composed of two symmetrically arranged first side walls and two symmetrically arranged second side walls, the first side walls and the second side walls are arranged perpendicular to each other, and the support opening is formed on the first side wall; the planar support bearing is arranged between the two first side walls, and the rotation plane of the planar support bearing is perpendicular to the plane where the first side walls are located.

[0009] In the linear slide rail, there are four planar support bearings, which are arranged in groups of two on both sides of the main body.

[0010] In the linear slide rail, the slider further includes a planar stabilizing bearing, which is arranged between the two second side walls, and the rotation plane of the planar supporting bearing is perpendicular to the plane where the second side walls are located.

[0011] The linear slide rail, wherein the diameter of the planar stabilizing bearing is equal to the spacing between the two second side walls; and / or, two planar stabilizing bearings are provided, which are located at both ends of the main body along the moving direction of the slider.

[0012] The linear slide rail, wherein the edge position of the support opening is provided with a first support wall and a second support wall parallel to each other, the surface of the first support wall facing the first side wall away from the support opening is a first contact surface, and the surface of the first support wall facing the second support wall is a second contact surface; the surface of the first side wall on the second support wall facing the side away from the support opening is a third contact surface, and the surface of the second support wall facing the first support wall is a fourth contact surface; the first contact surface and the third contact surface are used to contact the planar support bearing; the second contact surface and the fourth contact surface are used to contact the planar stabilizing bearing.

[0013] In the linear slide rail, the width of the main body is smaller than the diameter of the planar support bearing, and the main body is connected to the center position of the planar support bearing.

[0014] In the linear slide rail, the planar support bearing includes a metal raceway and ceramic balls.

[0015] In the linear slide rail, the diameter of the planar support bearing is 0.1 to 0.5 mm smaller than the distance between the two symmetrical sides of the hollow track.

[0016] In the linear slide rail, the support opening is arranged at a corner of the hollow track.

[0017] Compared with the prior art, the embodiments of the present invention have the following advantages:

[0018] The linear slide rail disclosed in the present application increases the contact points between the main body of the slider and the hollow track and improves stability by arranging at least two planar support bearings inside the hollow track; the cross-sectional shape of the hollow track is a polygon with an even number of sides, and during the sliding of the slider, the planar support bearings between the two symmetrical sides on the hollow track are relatively stable, reducing left and right deviation; in particular, the diameter value of the planar support bearings is set to be smaller than the spacing value of the two symmetrical sides on the hollow track, so that there is a gap between the slider and the track when sliding, and there is space for adjustment when encountering a turn or obstacle on the track, and when the movement of one planar support bearing is blocked, the other pulley is still in a normal movement state, so the overall movement trend of the slider will push the blocked planar support bearing to break away from the obstacle, or change the direction of movement and continue to move along the curved track, that is, the slider can overcome defective obstacles when moving on the track, easily turn, increase the flexibility of the slider, and solve the problem of poor operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 It is a partial structural schematic diagram of the linear slide rail in the present invention;

[0021] Figure 2 Schematic diagram of the structure of the linear slide rail in the present invention;

[0022] Figure 3 Schematic cross-sectional views of the linear slide rails along the length direction of the hollow rails in several embodiments of the present invention;

[0023] Figure 4 Schematic front views of linear guide rails in several embodiments of the present invention;

[0024] Figure 5 A schematic structural diagram of a slider in one embodiment of the present invention;

[0025] Figure 6 Schematic diagram of the structure of a slider in another embodiment of the present invention.

[0026] Among them, 100, hollow track; 110, support opening; 120, first side wall; 130, second side wall; 140, first support wall; 141, first contact surface; 142, second contact surface; 150, second support wall; 151, third contact surface; 152, fourth contact surface; 200, slider; 210, main body; 220, plane support bearing; 221, metal raceway; 222, ceramic ball; 230, plane stable bearing. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0028] Linear slides, also known as linear guides or linear guideways, consist of sliders and rails and are used for linear reciprocating motion in mechanical devices. They have a wide range of applications, from simple drawer rails in furniture to instrument motion in high-precision machinery. Common applications include grinders, milling machines, precision measuring instruments, handling devices, conveying equipment, industrial automation equipment, semiconductor machinery, laser engraving machines, packaging machines, CNC processing machines, CNC grinders, and large gantry machine tools. Because linear guides accelerate the movement of equipment, they are the equivalent of highways or high-speed rail systems in mechanical systems.

[0029] The slider and track of a linear slide are components used to support and guide movement, respectively. The slider reciprocates in the direction given by the track. The medium between the slider and track can be sliding, rolling, fluid, or magnetic levitation. Sliding sliders use materials with relatively low friction, such as brass or nylon. Holes are usually punched into the slider and lubricated to further reduce friction between the slider and track. This type of track has high bearing capacity and is commonly found in telescopic booms of cranes. Rolling slides use balls or rollers to reduce friction and are the most widely used linear slides. Fluid slides drill small holes in the track and spray liquid or gas to eliminate contact between the slider and track, thus avoiding friction and increasing the slider's movement speed. Magnetic levitation slides use the magnetic force between magnets or superconductors to separate the sliders, also avoiding friction. For example, the well-known maglev train uses this type of slide.

[0030] In the prior art, rolling slides often use rolling steel balls as sliders. For example, the slides on both sides of a common drawer use a string of balls rolling back and forth to drive the drawer's opening and closing. When moving long distances, the slide has many closed ball channels (grooves), and as the slider moves forward, the balls circulate in these channels. The advantages of rolling slides include: First, the slide and slider make contact through multiple balls, resulting in minimal wobbling, making them suitable for equipment with high precision requirements; second, the friction of point contact is low, allowing for subtle movements and achieving high-precision positioning of control devices; third, point contact is less likely to generate frictional heat during movement and is less susceptible to deformation due to heat, making it suitable for higher-speed movement; fourth, the balls have separate ball channels, each containing multiple balls, so the force on the slider's rotating surface is distributed across multiple balls, allowing for a larger load capacity.

[0031] However, existing ball-type linear slides also have disadvantages: First, the balls circulate and reciprocate in the ball channel, and the balls in the slider can contact each other, so there is more mutual collision and friction during movement. Therefore, their lubrication requirements are higher than those of ordinary drawer slides and deep groove rolling bearings. This is also the reason why the ball grooves are usually made of lubricated plastic; Second, the balls are in constant contact with the slide, causing lubricating oil to remain on the slide. Over time, dust easily condenses on the slide, and then adheres to the balls during movement, and even is carried into the ball channel, which ultimately leads to poor movement of the balls and hinders the circulation of the balls; Third, After using lubricating oil, the slide needs to be maintained frequently, oiled and wiped clean, which increases maintenance costs; fourth, many environments, such as clean rooms for chip processes, do not allow too many oil molecules to appear. In addition, lubricating oil is not allowed in vacuum systems or high-temperature environments, which limits the use environment of ball linear slides; fifth, the multi-point contact fault tolerance between the ball and the slide is poor. If there is a defect on the slide that is the same size as the ball, then the movement of the slider will be greatly affected, that is, the movement has high requirements for the slide. If the slide needs to be extended or spliced, or a curved slide is required, it is easy to have a significant impact on the sliding process.

[0032] In short, linear slides are difficult to use in non-lubricated clean, vacuum, and high-temperature environments. In addition, the poor fault tolerance and low load-bearing capacity of linear slides limit their application in important aspects such as extension, curves, and load-bearing. Their own lack of flexibility can easily lead to poor operation.

[0033] like Figure 1 and Figure 2As shown, in one embodiment of the present application, a linear slide rail is disclosed, which includes a hollow track 100 and a slider 200 sliding in the hollow track 100, the cross-sectional shape of the hollow track 100 is a polygon with an even number of sides, and a support opening 110 is provided on the hollow track 100; the slider 200 includes a main body 210 and at least two planar support bearings 220 arranged along the length direction of the main body 210, the planar support bearing 220 is installed between the two symmetrical sides of the hollow track 100, and the diameter value of the planar support bearing 220 is smaller than the spacing value between the two symmetrical sides on the hollow track 100.

[0034] The linear slide rail disclosed in this embodiment increases the contact points between the main body 210 of the slider 200 and the hollow track 100 by providing at least two planar support bearings 220 inside the hollow track 100, thereby improving stability; the bearings have a strong load-bearing capacity, which can increase the ability of the slider 200 to carry heavy objects; the cross-sectional shape of the hollow track 100 is a polygon with an even number of sides. During the sliding process of the slider 200, the planar support bearings 220 between the two symmetrical sides on the hollow track 100 are relatively stable, reducing left and right deviation.

[0035] Secondly, the diameter of the planar support bearing 220 disclosed in this embodiment is smaller than the spacing between the two symmetrical sides of the hollow track 100, so that there is a gap between the slider 200 and the track when sliding. When encountering a turn or obstacle on the track, there is space for adjustment, and when the movement of one planar support bearing 220 is blocked, the other pulley is still in a normal movement state, so the overall movement trend of the slider 200 will push the blocked planar support bearing 220 to break away from the obstacle, or change the direction of movement and continue to move along the arc track. In other words, the slider 200 can overcome defective obstacles when moving on the track, easily turn, increase the flexibility of the slider 200, and solve the problem of poor operation.

[0036] In addition, when the slider 200 disclosed in this embodiment moves on the hollow track 100, the front and rear two planar support bearings 220 are in contact with the hollow track 100, and the surface contact between the main body 210 and the hollow track 100 is replaced by point contact, thereby reducing friction resistance and facilitating smooth sliding. Moreover, through the cooperation of the front and rear two planar support bearings 220, the slider 200 is in point contact with the hollow track 100 in any state, maintaining a stable moving state.

[0037] For example, the diameter values ​​of the two planar support bearings 220 are both larger than the width value of the main body 210, and the main body 210 is connected to the center position of the planar support bearing 220, as shown in Figure (3) (a). When the support opening 110 is set on the bottom wall of the hollow track 100, the main body 210 is connected to the weight through the bottom surface, and the weight is suspended below the main body 210 during the movement. When the slider 200 moves at a constant speed, the gravity of the weight pulls the slider 200 close to the bottom wall of the hollow track 100, and the two planar support bearings 220 contact the lower side wall of the hollow track 100 at the same time, supporting the main body 210 away from the hollow track 100 through multi-point contact, reducing friction and avoiding wear of the main body 210.

[0038] As shown in Figure (3) (b), when the slider 200 accelerates, due to the influence of inertia, the pulling force of the weight on the slider 200 changes from vertically downward to tilted backward along the moving direction. At this time, the front planar support bearing 220 on the slider 200 is close to the bottom wall of the hollow track 100, and the rear planar support bearing 220 is lifted and contacts the top wall of the hollow track 100. The rolling directions of the two planar support bearings 220 are opposite, and the main body 210 can still be stabilized inside the hollow track 100 without contacting the hollow track 100, but reducing friction through point contact.

[0039] As shown in Figure (3) (c), when the slider 200 decelerates, due to the influence of inertia, the pulling force of the weight on the slider 200 changes from vertically downward to tilted forward along the moving direction. At this time, the rear planar support bearing 220 on the slider 200 is close to the bottom wall of the hollow track 100, and the front planar support bearing 220 is lifted and contacts the top wall of the hollow track 100. The rolling directions of the two planar support bearings 220 are opposite, and the main body 210 can still be stabilized inside the hollow track 100 without contacting the hollow track 100, but reducing friction through point contact.

[0040] To sum up, under any circumstances, the slider 200 disclosed in this embodiment can maintain point contact with the hollow track 100, maintain stable movement while reducing friction, and as the movement speed and direction change, the contact position between the planar support bearing 220 and the hollow track 100 can be flexibly adjusted, thereby improving the flexibility of the slider 200 and making it suitable for various high-speed movement occasions.

[0041] like Figure 4As shown in the embodiment, the hollow track 100 is a quadrilateral, hexagonal, octagonal, dodecagonal, etc. According to different use scenarios, different numbers of hollow pipes with even edges can be used as the hollow track 100; in order to make the slider 200 stable during movement, the support port 110 can be arranged on the symmetry axis of the cross-sectional shape of the hollow track 100, and the plane support bearing 220 can be arranged on both sides of the symmetry axis to stabilize the main body 210, which is conducive to overlapping the center of gravity of the main body 210 with the center of gravity of the hollow track 100, thereby avoiding excessive pressure on one side of the hollow track 100, and facilitating the sliding of the slider 200.

[0042] As shown in the embodiment, the hollow track 100 is a quadrilateral, hexagonal, octagonal, dodecagonal, etc. According to different use scenarios, different numbers of hollow pipes with even edges can be used as the hollow track 100; in order to make the slider 200 stable during movement, the support port 110 can be arranged on the symmetry axis of the cross-sectional shape of the hollow track 100, and the plane support bearing 220 can be arranged on both sides of the symmetry axis to stabilize the main body 210, which is conducive to overlapping the center of gravity of the main body 210 with the center of gravity of the hollow track 100, thereby avoiding excessive pressure on one side of the hollow track 100, and facilitating the sliding of the slider 200. Figure 4 As shown in the embodiment, the hollow track 100 is a quadrilateral, hexagonal, octagonal, dodecagonal, etc. According to different use scenarios, different numbers of hollow pipes with even edges can be used as the hollow track 100; in order to make the slider 200 stable during movement, the support port 110 can be arranged on the symmetry axis of the cross-sectional shape of the hollow track 100, and the plane support bearing 220 can be arranged on both sides of the symmetry axis to stabilize the main body 210, which is conducive to overlapping the center of gravity of the main body 210 with the center of gravity of the hollow track 100, thereby avoiding excessive pressure on one side of the hollow track 100, and facilitating the sliding of the slider 200.

[0043] As shown in the embodiment, the hollow track 100 is a quadrilateral, hexagonal, octagonal, dodecagonal, etc. According to different use scenarios, different numbers of hollow pipes with even edges can be used as the hollow track 100; in order to make the slider 200 stable during movement, the support port 110 can be arranged on the symmetry axis of the cross-sectional shape of the hollow track 100, and the plane support bearing 220 can be arranged on both sides of the symmetry axis to stabilize the main body 210, which is conducive to overlapping the center of gravity of the main body 210 with the center of gravity of the hollow track 100, thereby avoiding excessive pressure on one side of the hollow track 100, and facilitating the sliding of the slider 200. Figure 2 As shown in the embodiment, the hollow track 100 is a quadrilateral, hexagonal, octagonal, dodecagonal, etc. According to different use scenarios, different numbers of hollow pipes with even edges can be used as the hollow track 100; in order to make the slider 200 stable during movement, the support port 110 can be arranged on the symmetry axis of the cross-sectional shape of the hollow track 100, and the plane support bearing 220 can be arranged on both sides of the symmetry axis to stabilize the main body 210, which is conducive to overlapping the center of gravity of the main body 210 with the center of gravity of the hollow track 100, thereby avoiding excessive pressure on one side of the hollow track 100, and facilitating the sliding of the slider 200.

[0044] Generally, the supporting opening 110 is vertically upward or vertically downward, the two first side walls 120 are horizontally arranged, and the plane supporting bearing 220 is vertically arranged. When the main body 210 is loaded with a heavy object, the gravity of the heavy object is vertically downward, so that the plane supporting bearing 220 is only subjected to the force in the vertical plane during movement, and generates pressure on the first side wall 120, and is not deviated to the second side wall 130, so that the side of the plane supporting bearing 220 collides with the second side wall 130 is reduced, and the damage risk of the plane supporting bearing 220 is reduced.

[0045] As shown in Figure 5 , as another embodiment of the present embodiment, it is disclosed that the plane supporting bearing 220 is provided with four, and the four plane supporting bearings 220 are arranged in two groups on the two sides of the main body 210, respectively. Because the supporting opening 110 needs to occupy a part of the space on the first side wall 120, if only two plane supporting bearings 220 are arranged on one side of the supporting opening 110, it is easy to cause the main body 210 to tilt towards the other side of the supporting opening 110, which is not conducive to stable sliding. The arrangement of four plane supporting bearings 220 can increase the stability of the main body 210, and the main body 210 is not easy to tilt. Preferably, two plane supporting bearings 220 are arranged on the two sides of the supporting opening 110, respectively, and the central position of the main body 210 is connected with the heavy object, so that the two sides of the main body 210 are supported, and the risk of tilting is avoided. Of course, in order to increase the stability of the main body 210, the number of plane supporting bearings 220 can be appropriately increased according to the size, which is not listed one by one in this embodiment.

[0046] As shown in Figure 5 , as another embodiment of the present embodiment, it is disclosed that the slider 200 further comprises a plane stabilizing bearing 230, the plane stabilizing bearing 230 is arranged between the two second side walls 130, and the rotation plane of the plane supporting bearing 220 is perpendicular to the plane where the second side wall 130 is located. Although the above arrangement of multiple plane supporting bearings 220 can stabilize the main body 210, the heavy object loaded on the main body 210 has inertia during sliding, and still easily generates torsion during turning or lifting, so that the main body 210 has the risk of lateral movement. The arrangement of the plane stabilizing bearing 230 between the two second side walls 130 can further increase the stability of the main body 210. When the main body 210 is forced to laterally collide with the second side wall 130, the plane stabilizing bearing 230 contacts the second side wall 130, supports the main body 210 away from the second side wall 130, and protects the main body 210, the side of the plane supporting bearing 220, and the second side wall 130.

[0047] Secondly, there is another benefit in providing the planar stabilizing bearing 230 in this embodiment. The planar stabilizing bearing 230 can also rotate, so when it contacts the second side wall 130, it is a rolling contact. The contact area is small, and the friction resistance generated is also small, which reduces the negative impact on the overall movement of the slider 200.

[0048] In addition, the plane stabilizing bearing 230 disclosed in this embodiment can use the same type and model of bearing as the plane supporting bearing 220. Using the same bearing can firstly facilitate procurement and save costs; secondly, it is convenient for assembly and design.

[0049] Specifically, as another implementation of this embodiment, it is disclosed that the diameter value of the planar stabilizing bearing 230 is equal to the spacing value between the two second side walls 130, so that the planar stabilizing bearing 230 always maintains contact with the two second side walls 130 during movement, does not shake left and right, reduces collisions, and at the same time, is conducive to maintaining stability during high-speed movement.

[0050] It should be noted that the diameter value of the planar stabilizing bearing 230 can be smaller than the spacing value between the two second side walls 130, but must be greater than the length value of the main body 210 along the direction of the two second side walls 130. When the slider 200 is subjected to a lateral force, it is ensured that the planar stabilizing bearing 230 contacts the second side wall 130 before the main body 210 and starts to roll, thereby protecting the main body 210 from wear.

[0051] like Figure 5 As shown, as another implementation of this embodiment, two planar stabilizing bearings 230 are provided, located at both ends of the main body 210 along the movement direction of the slider 200. Providing planar stabilizing bearings 230 at both the head and tail of the main body 210 further enhances the overall stability of the slider 200, preventing either end of the slider 200 from tilting during sliding. Preferably, in this embodiment, two planar stabilizing bearings 230 having a diameter equal to the distance between the two second sidewalls 130 can be provided at both ends of the main body 210.

[0052] like Figure 2 and Figure 6As shown, as another implementation of this embodiment, it is disclosed that the edge position of the support opening 110 is provided with a first support wall 140 and a second support wall 150 parallel to each other, the surface of the first support wall 140 facing the first side wall 120 away from the support opening 110 is a first contact surface 141, and the surface of the first support wall 140 facing the second support wall 150 is a second contact surface 142; the surface of the first side wall 120 on the second support wall facing the side away from the support opening 110 is a third contact surface 151, and the surface of the second support wall 150 facing the first support wall 140 is a fourth contact surface 152; the first contact surface 141 and the third contact surface 151 are used to contact the planar support bearing 220; the second contact surface 142 and the fourth contact surface 152 are used to contact the planar stabilizing bearing 230.

[0053] The planar stabilizing bearing 230 in this embodiment is arranged between the first support and the second support wall 150, and has no contact with the second side wall 130. At the same time, even if the planar support bearing 220 moves sideways during movement and presses against the first support wall 140 or the second support wall 150, the side collision of the planar support bearing 220 with the second side wall 130 can be better avoided; that is, in this embodiment, by arranging a slightly smaller planar stabilizing bearing 230 at the support opening 110, the main body 210 of the slider 200 is maintained in the middle position of the hollow track 100, reducing the collision or friction with the second side wall 130 during the movement of the slider 200, which is beneficial to protecting the slider 200 and the hollow track 100, and increasing the sliding speed, facilitating high-speed movement.

[0054] The first contact surface 141 and the third contact surface 151 are respectively used to contact the planar support bearings 220 on both sides of the support opening 110. The first contact surface 141 and the third contact surface 151 have smaller areas, which can further reduce the friction contact surface and allow the slider 200 to move faster; the second contact surface 142 and the fourth contact surface 152 are used to contact the planar stabilizing bearing 230.

[0055] When the support opening 110 is set in the middle position of the first side wall 120, it can be seen that the first side wall 120 is divided into two parts, and these two parts are used to support the slider 200, which requires a high bearing capacity of the structure. Setting the first support wall 140 and the second support wall 150 can also increase the structural strength and prevent the hollow track 100 from breaking.

[0056] like Figure 6As shown, as another implementation of this embodiment, the planar support bearing 220 is disclosed to include a metal raceway 221 and ceramic balls 222. Ceramic materials have high hardness, and after being processed into balls, the surface is smooth and the friction coefficient is low. Similarly, metal materials, such as stainless steel, are also hard materials and can play an excellent load-bearing role. Therefore, the planar support bearing 220 in this embodiment can be made entirely of stainless steel, using an assembly method of metal raceways 221 and metal balls, or an assembly method of metal raceways 221 and ceramic balls 222, thereby improving the load-bearing capacity of the planar support bearing 220. At the same time, its own friction coefficient is very small, and no lubricating oil is required during use. Therefore, the linear slide is more suitable for high-vacuum, ultra-high vacuum, high-temperature, high-cleanliness, and high-speed motion environments.

[0057] It should be noted that, when the planar stable bearing 230 is provided, an assembly method of the metal raceway 221 and the metal balls, or an assembly method of the metal raceway 221 and the ceramic balls 222 may also be adopted.

[0058] Specifically, as another implementation of this embodiment, the diameter of the planar support bearing 220 is disclosed as being 0.1 to 0.5 mm smaller than the distance between the two symmetrical sides of the hollow track 100. Leaving a gap between the planar support bearing 220 and the hollow track 100 helps increase the flexibility of the slider 200. However, the gap should not be too large, as this can easily cause the slider 200 to derail. A gap that is too small can result in insufficient flexibility for the slider 200 and still limit its movement speed. Therefore, it is more appropriate to set the diameter of the planar support bearing 220 to be within a range of 0.1 to 0.5 mm smaller than the distance between the two symmetrical sides of the hollow track 100.

[0059] Specifically, as another implementation of this embodiment, the support opening 110 is provided at a corner of the hollow track 100. When the support opening 110 is provided on the axis of symmetry of the cross-sectional shape of the hollow track 100, it is easier to keep the slider 200 stable. If the cross-sectional shape of the hollow track 100 is a regular hexagon, a regular octagon, etc., it has many axes of symmetry, so the support opening 110 can also be formed at the corner. Because the left and right corners are respectively a side of the hollow track 100, the flat support bearings 220 can be provided on both sides to keep the slider 200 stable.

[0060] Specifically, as an implementation manner of the embodiment, the main body 210 is provided with a connecting portion (not shown in the drawings) for connecting a load, and the connecting portion is arranged opposite to the supporting opening 110. The position of the main body 210 for connecting the load is the connecting portion. When the connecting portion is arranged opposite to the supporting opening 110, the load can be connected by a connecting rope, a connecting rod or the like in a straight line. During movement, the connecting rope or the connecting rod is kept in a taut state, reducing the contact friction with the hollow track 100 and avoiding wear. In addition, when the connecting portion is detachably connected with the load, the connecting portion is directly arranged on the side of the main body 210 facing the supporting opening 110. The slider 200 does not need to be disassembled, and the load can be conveniently connected or removed through the supporting opening 110.

[0061] In summary, the application discloses a linear sliding rail, which comprises a hollow track 100 and a slider 200 sliding in the hollow track 100. The cross-sectional shape of the hollow track 100 is a polygon with an even number of sides. A supporting opening 110 is arranged on the hollow track 100. The slider 200 comprises a main body 210 and at least two planar supporting bearings 220 arranged along the length direction of the main body 210. The planar supporting bearings 220 are arranged between the two symmetrical sides of the hollow track 100, and the diameter of the planar supporting bearings 220 is smaller than the distance between the two symmetrical sides of the hollow track 100. In the embodiment, the diameter of the planar supporting bearings 220 is smaller than the distance between the two symmetrical sides of the hollow track 100, so that a gap is left between the slider 200 and the track when the slider 200 slides. When the slider 200 encounters a turning part or an obstacle of the track, there is space for adjustment. When one planar supporting bearing 220 is blocked, the other planar supporting bearing 220 is still in a normal movement state. Therefore, the movement trend of the slider 200 can push the blocked planar supporting bearing 220 out of the obstacle or change the movement direction to continue movement along the arc-shaped track. That is, the slider 200 can overcome defects and obstacles and easily turn when moving on the track, increasing the flexibility of the slider 200 and solving the problem of poor operation.

[0062] It should be noted that the embodiments and features in the embodiments of the application can be combined with each other without conflict.

[0063] It should be noted that the application is introduced by taking a linear sliding rail as an example, but the application is not limited to linear sliding rails and can be applied to other similar workpieces.

[0064] It should be understood that the application is not limited to the precise structures described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the application is only limited by the appended claims.

[0065] The above merely describes preferred embodiments of the present application, and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A linear slide rail, characterized in that: The invention comprises a hollow track and a slider sliding in the hollow track, wherein a support opening is formed on the hollow track and is vertically upwardly arranged; the slider comprises a main body and at least two planar support bearings arranged along the length direction of the main body, wherein the planar support bearings are installed between two symmetrical sides of the hollow track, and the diameter value of the planar support bearings is smaller than the distance value between the two symmetrical sides of the hollow track; the diameter value of the planar support bearings is larger than the width value of the main body; The cross-section of the hollow track is rectangular, and the hollow track is composed of two symmetrically arranged first side walls and two symmetrically arranged second side walls, the first side walls and the second side walls are perpendicular to each other, and the support opening is formed on one of the first side walls; the planar support bearing is arranged between the two first side walls, and the rotation plane of the planar support bearing is perpendicular to the plane on which the first side walls are located; A first supporting wall and a second supporting wall are provided at the edge of the supporting opening, and are parallel to each other. The surface of the first supporting wall facing the first side wall away from the supporting opening is a first contact surface, and the surface of the first supporting wall facing the second supporting wall is a second contact surface. The surface of the second supporting wall facing the first side wall away from the supporting opening is a third contact surface, and the surface of the second supporting wall facing the first supporting wall is a fourth contact surface; The first contact surface and the third contact surface are used to contact the planar support bearing; The slider further includes a planar stabilizing bearing, the planar stabilizing bearing being disposed between the first supporting wall and the second supporting wall of the supporting opening, the second contact surface and the fourth contact surface being configured to contact the planar stabilizing bearing; and the rotation plane of the planar support bearing being perpendicular to the plane on which the second side wall is located; The diameter of the planar stabilizing bearing is equal to the distance between the first supporting wall and the second supporting wall; two planar stabilizing bearings are provided, and are located at both ends of the main body along the moving direction of the slider.

2. The linear guide rail according to claim 1, wherein: There are four planar support bearings, and the four planar support bearings are arranged in groups of two on both sides of the main body.

3. The linear guide rail according to claim 1, wherein: The width of the main body is smaller than the diameter of the planar support bearing, and the main body is connected to the center of the planar support bearing.

4. The linear guide rail according to claim 1, wherein: The planar support bearing includes a metal raceway and ceramic balls.

5. The linear guide rail according to claim 1, wherein: The diameter of the planar support bearing is 0.1 to 0.5 mm smaller than the distance between the two symmetrical sides of the hollow track.

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