Long-distance moving air floatation guide rail system

Abstract

The invention relates to the technical field of industrial production equipment, in particular to a long-distance moving air floating guide rail system. The long-distance moving air floating guide rail system comprises a sliding block installed on a guide rail, the guide rail is provided with a plurality of air channels and air paths connected with an air supply pipeline, a set of air outlet holes are formed in the portion, corresponding to each air path, between the guide rail and the sliding block and connected with the air paths, and air flows out of the air outlet holes to form an air film; the top end of the air throttle is fixed to the side wall of the guide rail, the inner wall of the sliding block makes contact with the top end of the air throttle and presses downwards to open the air throttle, and the air throttle automatically rebounds and is closed after the sliding block leaves. According to the long-distance moving air floating guide rail system, the normally-closed air throttle is arranged on the air passage to control opening and closing of the air passage, the air throttle is extruded to be opened through movement of the sliding block, the air throttle can be opened and closed at any time according to movement of the sliding block, and the influence of delay of an induction equipment control system is avoided while the air consumption is reduced; extra wiring work is not needed, the structure is simple, and the installation workload is small.

Description

Technical Field

[0001] The invention relates to the technical field of industrial production equipment, and in particular to a long-distance mobile air-floating guide rail system. Background Art

[0002] In the process of industrial production and processing, the air-floating guide rail system has the advantages of high precision, low friction and long life, and is widely used. During the operation, the air-floating guide rail needs to ensure the air-floating stiffness and air film thickness, which leads to excessive gas output of the air-floating guide rail during operation. How to reduce gas leakage and pressure loss while maintaining the stability of the air path pressure is an important technical problem for the existing air-floating rail equipment technology. In the prior art, sensing devices such as photoelectric switches, magnetic switches and solenoid valves are often used to control the switching of each air channel in the air-floating guide rail. However, the response speed of the sensing device has a certain delay relative to the movement of the slider, and the reliability is insufficient. At the same time, additional line layout and wiring work are required when installing the sensing device. The device structure is complex and the installation workload is large. Therefore, in view of the above shortcomings, a long-distance mobile air-floating guide rail system is proposed. Summary of the invention

[0003] 1. Technical issues to be resolved In view of the deficiencies of the prior art, the present invention provides a long-distance mobile air-floating guide rail system, which solves the problems of slow response speed, insufficient reliability, complex structure and large installation workload of the existing air-floating guide rail equipment when reducing gas leakage and pressure loss.

[0004] (II) Technical solution In order to solve the above problems, the present invention provides a long-distance mobile air-floating guide rail system, comprising: A slider and a guide rail, wherein the bottom surface of the slider is provided with a guide rail groove that matches the guide rail and is buckled downward onto the guide rail and moves forward and backward along the guide rail direction; a number of vertical air channels are evenly arranged inside the guide rail along the front-to-back direction, each air channel is provided with an air path horizontally arranged along the left-right direction of the guide rail, an air supply pipeline is provided below the guide rail, and the bottom end of the air channel is connected to the air supply pipeline; on the longitudinal section corresponding to each air channel on the guide rail surface, the part in contact with the slider is evenly provided with a plurality of air outlet holes, the air outlet holes are connected to the air path, and the gas in the air supply pipeline flows out from the air outlet holes to form an air film between the guide rail and the slider; a horizontal and normally closed throttle valve is provided below the air path on each of the air channels, and the top of the throttle valve is fixed on the side wall of the guide rail, and the slider moves along the guide rail to squeeze the top of the throttle valve to open the throttle valve, and the top of the throttle valve automatically rebounds and closes after the slider leaves.

[0005] Preferably, an upper air plug is provided at the top of each airway, and a side air plug is provided at the end of each airway.

[0006] Preferably, the throttle valve includes a sleeve, and a radially penetrating outer air hole corresponding to the position of the air supply branch is provided on the side wall of the sleeve; a valve core and a cylindrical cam are provided in the sleeve, and the lower end of the cylindrical cam is inserted into the valve core, and the top end is fixed on the side wall of the guide rail; the side wall of the valve core is provided with a radially penetrating inner air hole, and the slider moves back and forth along the guide rail to press down the top end of the cylindrical cam and rotate the valve core to make the inner air hole and the outer air hole coincide with each other.

[0007] Preferably, sealing rings are provided at the upper and lower ends of the valve core respectively; and a pressure cover is provided at the bottom end of the sleeve.

[0008] Preferably, the cross-section of the bottom end of the cylindrical cam and the valve core is polygonal, the top end of the cylindrical cam is cone-shaped, and a spring is provided between the bottom end of the cone and the top end of the valve core; a plurality of guide grooves obliquely extending from top to bottom are evenly arranged on the outer wall of the cone at the top end of the cylindrical cam along the circumferential direction, and a guide pin is provided at the position of the inner wall of the sleeve corresponding to the position of the guide groove, and the bottom end of the guide pin is inserted into the guide groove.

[0009] Preferably, washers are provided between the upper and lower ends of the spring and the valve core and the cylindrical cam.

[0010] Preferably, a ball retainer is provided at the top of the cylindrical cam, and balls are provided between the cylindrical cam and the ball retainer; the balls extend out of the side wall of the guide rail, and the slider moves back and forth along the guide rail to squeeze the balls and press the cylindrical cam downward.

[0011] Preferably, an end cover is provided above the ball retainer, the end cover and the side wall of the guide rail are in the same plane, and the top end of the ball extends out from the center of the end cover.

[0012] Preferably, a retaining ring is provided around the ball on the end cover, and a protective cover is provided above the retaining ring.

[0013] Preferably, an inward chamfered structure is provided at the position where the inner wall of the slider contacts the ball.

[0014] (III) Beneficial effects The long-distance movable air-floating guide rail system provided by the present invention has a normally closed throttle valve on the airway and fixes the top end of the throttle valve on the side wall of the guide rail, and the throttle valve is squeezed open by the movement of the slider. When the slider moves on the slide rail, each throttle valve is opened synchronously to form an air film between the slider and the guide rail. The air valve can be switched on and off at any time according to the movement of the slider, thereby reducing the gas consumption of the device during operation. At the same time, the throttle valve is used to replace the traditional sensing equipment, which is not affected by the delay of the sensing equipment control system, the device has a fast response speed, does not require additional wiring work, has a simple structure, and has a small installation workload. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the long-distance mobile air-floating guide rail system of the present invention; Figure 2 It is a cross-sectional view of the long-distance mobile air-floating guide rail system of the present invention; Figure 3 It is a structural diagram of the throttle valve of the long-distance mobile air-floating guide rail system of the present invention; Figure 4 This is a disassembled diagram of the throttle valve of the long-distance movable air floating guide rail system of the present invention.

[0016] Among them, 1. slider; 2. guide rail; 201. upper air plug; 202. side air plug; 203. air supply pipeline; 3. throttle valve; 301. pressure cover; 302. sealing ring; 303. valve core; 304. sleeve; 305. guide pin; 306. gasket; 307. spring; 308. cylindrical cam; 309. ball; 3010. ball retainer; 3011. end cover; 3012. retaining ring; 3013. protective cover. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0018] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by “upper”, “lower”, “inside”, “outside”, “top”, “bottom”, etc. are all based on the orientations or positional relationships shown in the accompanying drawings. The purpose is only to facilitate the description of the present invention and simplify the description. It does not indicate or imply that the referred parts must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0019] like Figure 1-4As shown, the present invention provides a long-distance mobile air-floating guide rail system, specifically comprising: a slider 1 and a guide rail 2, wherein the bottom surface of the slider 1 is provided with a guide rail groove that matches the guide rail 2 and is buckled downward onto the guide rail 2 and moves forward and backward along the guide rail 2. The position of the guide rail 2 is fixed and unchanged, and during the working process, the slider 1 moves back and forth along the front-back direction of the guide rail 2 according to the working requirements. The inside of the guide rail 2 is evenly provided with a plurality of vertical air channels along the front-back direction, and each air channel is provided with an air path horizontally arranged along the left-right direction of the guide rail 2, and an air supply pipeline 203 is provided below the guide rail 2, and the bottom end of the air channel is connected to the air supply pipeline 203; on the longitudinal section corresponding to each air channel on the surface of the guide rail 2, the part in contact with the slider 1 is evenly provided with a plurality of air outlets, and the air outlets are connected to the air path, and the gas in the air supply pipeline 203 flows out from the air outlet to form an air film between the guide rail 2 and the slider 1. During the working process, after the input end of the air supply pipeline 203 is connected to the pressure air source, the pressure air source is turned on to continuously deliver the working air to the air supply pipeline 203. The working air flows into the air channel and the air path along the air supply pipeline 203 and then flows out from the air outlet to between the slider 1 and the guide rail 2, forming a layer of air film between the slider 1 and the guide rail 2 to separate the slider 1 and the guide rail 2. When the slider 1 moves on the surface of the guide rail 2, the air film slightly lifts the slider 1 upwards, thereby reducing the friction between the slider 1 and the guide rail 2. While ensuring that the slider 1 can move back and forth along the guide rail 2, the wear between the slider 1 and the guide rail 2 is reduced, thereby extending the service life of the device.

[0020] The strength and thickness of the air film are determined by the gas output and the pressure of the gas output from the air outlet. During operation, the greater the gas output and the gas output pressure, the higher the strength of the formed air film. Generally, as the weight of the object that the slider 1 needs to bear and carry increases, the strength of the air film also needs to be increased. At this time, the gas output pressure can be increased by controlling the output pressure of the pressure gas source. When the gas output pressure remains unchanged, increasing the diameter of the air outlet can increase the gas output of the air outlet. During operation, the output pressure of the air outlet well and the pressure gas source are adjusted according to actual work needs.

[0021] It should be noted that in order to reduce the processing difficulty and workload of the device, when making the guide rail 2, the air duct is usually formed by a processing drill bit penetrating the guide rail 2 from top to bottom, and the air duct is formed by a processing drill tool extending from the side wall of the guide rail 2 into the guide rail 2 to a designated position. In order to prevent the gas from overflowing from the air path and the processing position of the air path during operation, resulting in an increase in the gas consumption of the device, an upper air plug 201 is usually provided at the top of each air duct and a side air plug 202 is provided at the end of each air path. The air duct and the air path are sealed by the upper air plug 201 and the side air plug 202, thereby improving the sealing of the device and avoiding excessive gas consumption caused by leakage of the device during operation.

[0022] like Figure 2-4As shown, each of the air passages in the present invention is provided with a horizontal and normally closed throttle valve 3 below the air passage, and the throttle valve 3 controls the opening and closing state of the air passage. When the throttle valve 3 is opened, the air passage is opened, and the working gas normally flows from the air passage to the air outlet to form an air film between the guide rail 2 and the slider 1. When the throttle valve 3 is closed, the air passage is blocked, and the air film disappears.

[0023] Among them, the throttle valve 3 includes a sleeve 304, and a radially penetrating outer air hole corresponding to the position of the air supply branch is provided on the side wall of the sleeve 304; a valve core 303 and a cylindrical cam 308 are provided in the sleeve 304, and the lower end of the cylindrical cam 308 is inserted into the valve core 303, and the top end is fixed on the side wall of the guide rail 2; the side wall of the valve core 303 is provided with a radially penetrating inner air hole, and the slider 1 moves forward and backward along the guide rail 2 to press down the top end of the cylindrical cam 308 and rotate the valve core 303 to make the inner air hole and the outer air hole coincide. The sleeve 304 serves as the body of the throttle valve 3 and is installed in the guide rail 2. The throttle valve 3 controls the switch of the throttle valve 3 through the valve core 303 and the inner and outer air holes on the sleeve 304. When the positions of the inner air hole and the outer air hole coincide with each other, the air passage is opened, and the working air flows upward into the air passage along the inner and outer air holes through the throttle valve, forming an air film between the guide rail 2 and the slider 1; conversely, when the valve core 303 rotates to separate the inner and outer air holes, the throttle valve 3 is closed, and the air film of the corresponding part disappears. The cylindrical cam 308 is used as the switch and transmission device of the throttle valve 3. After the top of the cylindrical cam 308 is fixed on the side wall of the guide rail 2, the slider 1 will contact the top of the guide rail 2 when it moves along the guide rail 2. As the slider 1 continues to move, the inner wall of the slider 1 will squeeze the top of the cylindrical cam 308 into the guide rail 2. When the cylindrical cam 308 moves inward, it converts the pressure of the slider 1 squeezing inward into a torsional force that drives the valve core 303 to rotate, so that the valve core 303 rotates, thereby realizing the control of the opening of each throttle valve 3 while the slider 1 moves. The throttle valve 3 controls the switch of the airway and the formation of the air film, and does not need to use sensors such as sensors to control the formation of the air film. It only relies on the mechanical structure, and can respond to the action immediately when the slider 1 passes by. The response speed is fast and no additional wiring work is required when installing the sensor instrument, which reduces the workload of assembling the device and simplifies the device structure.

[0024] It should be noted that the cross section of the bottom end of the cylindrical cam 308 and the valve core 303 is polygonal, and the top end of the cylindrical cam 308 is truncated; the outer wall of the truncated cone at the top end of the cylindrical cam 308 is evenly provided with a plurality of guide grooves that run obliquely from top to bottom along the circumferential direction, and the inner wall of the sleeve 304 is provided with a guide pin 305 at the position corresponding to the guide groove, and the bottom end of the guide pin 305 is inserted into the guide groove. Under the action of the guide pin 305 and the guide groove, when the slider 1 moves into the guide rail 2 to push the cylindrical cam 308, since the position of the guide pin 305 is fixed, the guide pin 305 contacts the inner wall of the guide groove and pushes the cylindrical cam 308 to rotate along the shape of the guide groove. When the cylindrical cam 308 rotates, since the cross-section of the bottom where it cooperates with the valve core 303 is polygonal, when the cylindrical cam 308 rotates, the wall at the bottom contacts the inner wall of the valve core 303 and transmits the rotational force of the cylindrical cam 308 to the valve core 303, driving the valve core 303 to rotate synchronously, thereby realizing opening of the throttle valve 3 when the cylindrical cam 308 is pushed inward.

[0025] In order to save the air output of the device, the throttle valve 3 should automatically close the throttle valve after the slider 1 passes so that the air film on the surface of the guide rail 2 disappears after the slider 1 passes. Therefore, it is necessary to make the top of the cylindrical cam 308 in the throttle valve 3 automatically rebound after the slider 1 passes. To achieve the above effect, a spring 307 is usually provided between the bottom end of the truncated cone and the top end of the valve core 303. When the top end of the cylindrical cam 308 loses the pressure of the slider 1 after the slider 1 passes, the spring 307 pushes the cylindrical cam 308 outward under its own elastic action. In the process of the cylindrical cam 308 moving upward, the guide pin 305 pushes the cylindrical cam 308 to rotate along the guide groove, and the rotation direction of the cylindrical cam 308 is opposite to the rotation direction when the cylindrical cam 308 is squeezed inward. At this time, the bottom end of the rotating cylindrical cam 308 drives the valve core 303 to rotate synchronously, thereby restoring the valve core 303 and the cylindrical cam 308 to their original positions, and realizing the automatic closing of the throttle valve 3.

[0026] In order to improve the sealing performance of the device, sealing rings 302 are respectively provided at the upper and lower ends of the valve core 303 to prevent the working gas from leaking from the two ends of the valve core 303 when the throttle valve 3 is closed, resulting in an increase in the gas consumption of the device. At the same time, a gland 301 is provided at the bottom end of the sleeve 304, and the gland 301 is mainly used to seal the sleeve 304 to seal the throttle valve 3 and the internal components into a whole. Washers 306 are provided between the upper and lower ends of the spring 307 and the valve core 303 and the cylindrical cam 308. The washers 306 play a buffering role between the upper and lower ends of the spring 307 and the valve core 303 and the cylindrical cam 308, preventing the spring 307 from wearing the valve core 303 and the cylindrical cam 308 during repeated compression and extension, reducing the wear of the device during use, and extending the service life of the device.

[0027] In the present invention, a ball holder 3010 is provided at the top of the cylindrical cam 308, and a ball 309 is provided between the cylindrical cam 308 and the ball holder 3010; the ball extends out of the side wall of the guide rail 2, and the slider 1 moves forward and backward along the guide rail 2 to squeeze the ball 309 and press the cylindrical cam 308 downward. The ball holder 3010 fixes the ball 309 at the top of the cylindrical cam 308. When the slider 1 passes by, the inner wall of the slider 1 contacts the ball 309 and gradually pushes the ball 309 and the cylindrical cam 308 inward to open the throttle valve. When the ball 309 contacts the inner wall of the slider 1, it rotates according to the direction of the pressure it receives, balances the tangential squeezing force it receives, reduces the friction when it is released from the slider 1, and increases its service life.

[0028] An end cap 3011 is provided above the ball retainer 3010, and the end cap 3011 is in the same plane as the side wall of the guide rail 2, and the top of the ball 309 extends out from the center of the end cap 3011. The end cap 3011 fixes the throttle valve 3 in the guide rail 2 to prevent the throttle valve 3 from moving outward during operation, and at the same time keeps the area around the ball 309 flat, so that the slider 1 remains flat during movement, and prevents the slider 1 from bumping and affecting the working efficiency of the device.

[0029] It should be noted that a retaining ring 3012 is provided around the ball 309 on the end cover 3011, and a protective cover 3013 is provided above the retaining ring 3012. The retaining rings 3012 and 3013 cooperate to fill the gap around the ball 309 and protect the ball 309, preventing dust, gravel and other debris from falling into the gap between the ball 309 and the end cover 3011 during operation, causing the ball to be stuck in rotation.

[0030] In addition, an inward chamfered structure is provided at the contact position between the inner wall of the slider 1 and the ball 309. When the slider 1 contacts the ball 309, the ball 309 contacts the chamfered structure. As the slider 1 moves, the ball 309 is gradually pressed down to reduce the friction force on the ball 309. At this time, the ball 309 will roll along the chamfered structure and will not produce rigid contact with the slider 1, further reducing the wear between the slider 1 and the ball 309 when the ball 309 is pressed.

[0031] The long-distance mobile air-floating guide rail system provided by the present invention can reduce gas leakage and pressure loss while maintaining stable gas line pressure and has strong reliability. The specific operation process of the device is as follows: Step 1: Select a guide rail of appropriate length according to work requirements and install the slider on the guide rail.

[0032] Step 2: Start the pressure gas source connected to the gas supply pipeline. At this time, the working gas flows into the airway along the gas supply pipeline, and after the throttle valve is opened, the working gas flows out from the gas outlet along the gas channel and the gas path.

[0033] Step 3: Move the slider on the guide rail according to the working requirements. In this process, when the slider moves in the specified direction, the inner wall of the slider will contact and press the ball protruding from the side wall of the guide rail in the forward direction, and the ball will press the cylindrical cam and drive the valve core to rotate, so that the inner air hole on the valve core coincides with the outer air hole on the sleeve. At this time, the throttle valve opens, and the working air flows out from the airway and the air outlet hole along the inner edge of the air path corresponding to the opened throttle valve. At this time, the working air flows into the space between the slider and the guide rail to form a layer of air film to reduce the friction between the guide rail and the slider.

[0034] Step 4: The slider continues to move. At this time, the slider continues to move forward and opens the throttle valve in front of it one by one along the motion trajectory as described in step 3, so that there is always an air film between the slider and the guide rail; at the same time, after the end of the slider passes, the ball separated from the slider loses the pressure applied by the slider, and bounces up under the action of the spring and drives the valve core to rotate back to its original position to separate the inner air hole and the outer air hole, realize the closure of the throttle valve, and make the air film disappear in the area after the slider passes.

[0035] Step 5. Repeat steps 3 and 4. When the slider moves on the guide rail, the throttle valve at the position is opened as it moves so that there is always an air film between the slider and the guide rail. When the slider leaves, the throttle valve in the passing area is automatically closed to eliminate the air film, saving gas consumption of the device.

[0036] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A long-distance mobile air-floating guide rail system, characterized in that: include: A slider (1) and a guide rail (2), wherein the bottom surface of the slider (1) is provided with a guide rail groove that matches the guide rail (2) and is buckled downward onto the guide rail (2) and moves forward and backward along the guide rail (2); a plurality of vertical air passages are evenly arranged inside the guide rail (2) along the front-back direction, each air passage is provided with an air passage horizontally arranged along the left-right direction of the guide rail (2); an air supply pipeline (203) is provided below the guide rail (2), and the bottom end of the air passage is connected to the air supply pipeline (203); on the longitudinal section corresponding to each air passage on the surface of the guide rail (2), the portion in contact with the slider (1) A plurality of air outlet holes are evenly arranged, the air outlet holes are connected to the air path, and the gas in the air supply pipeline (203) flows out from the air outlet holes to form an air film between the guide rail (2) and the slider (1); a horizontal and normally closed throttle valve (3) is provided below the air path on each of the air paths, and the throttle valve (3) controls the opening and closing state of the air path; the top end of the throttle valve (3) is fixed on the side wall of the guide rail (2), the slider (1) moves along the guide rail (2) to squeeze the top end of the throttle valve (3) to open the throttle valve (3), and the top end of the throttle valve (3) automatically rebounds and closes after the slider (1) leaves.

2. The long-distance mobile air-floating guide rail system according to claim 1, characterized in that: An upper air plug (201) is provided at the top of each air passage, and a side air plug (202) is provided at the end of each air passage.

3. The long-distance mobile air-floating guide rail system according to claim 2, characterized in that: The throttle valve (3) comprises a sleeve (304), the side wall of which is provided with an outer air hole which penetrates radially and corresponds to the position of the air supply branch; a valve core (303) and a cylindrical cam (308) are provided in the sleeve (304), the lower end of the cylindrical cam (308) is inserted into the valve core (303), and the top end is fixed on the side wall of the guide rail (2); the side wall of the valve core (303) is provided with an inner air hole which penetrates radially, and the slider (1) moves forward and backward along the guide rail (2) to press down the top end of the cylindrical cam (308) to rotate the valve core (303) so that the inner air hole and the outer air hole overlap.

4. The long-distance mobile air-floating guide rail system according to claim 3, characterized in that: The upper and lower ends of the valve core (303) are respectively provided with sealing rings (302); and the bottom end of the sleeve (304) is provided with a pressure cover (301).

5. The long-distance mobile air-floating guide rail system according to claim 3, characterized in that: The cross-section of the fitting portion between the bottom end of the cylindrical cam (308) and the valve core (303) is polygonal, the top end of the cylindrical cam (308) is truncated, and a spring (307) is provided between the bottom end of the truncated cone and the top end of the valve core (303); a plurality of guide grooves obliquely extending from top to bottom are evenly provided on the outer wall of the truncated cone at the top end of the cylindrical cam (308) along the circumferential direction, and a guide pin (305) is provided at a position on the inner wall of the sleeve (304) corresponding to the position of the guide groove, and the bottom end of the guide pin (305) is inserted into the guide groove.

6. The long-distance mobile air-floating guide rail system according to claim 5, characterized in that: Washers (306) are provided between the upper and lower ends of the spring (307) and the valve core (303) and the cylindrical cam (308).

7. The long-distance mobile air-floating guide rail system according to claim 5, characterized in that: A ball retainer (3010) is provided at the top of the cylindrical cam (308), and a ball (309) is provided between the cylindrical cam (308) and the ball retainer (3010); the ball extends out of the side wall of the guide rail (2), and the slider (1) moves forward and backward along the guide rail (2) to squeeze the ball (309) and press the cylindrical cam (308) downward.

8. The long-distance mobile air-floating guide rail system according to claim 7, characterized in that: An end cover (3011) is provided above the ball retainer (3010), the end cover (3011) and the side wall of the guide rail (2) are in the same plane, and the top end of the ball (309) extends out from the center of the end cover (3011).

9. The long-distance mobile air-floating guide rail system according to claim 8, characterized in that: A retaining ring (3012) is provided on the end cover (3011) around the ball (309), and a protective cover (3013) is provided above the retaining ring (3012).

10. The long-distance mobile air-floating guide rail system according to claim 9, characterized in that: An inward chamfered structure is provided at the contact position between the inner wall of the slider (1) and the ball (309).

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