Self-lubricating linear guide rail mechanism

Abstract

The invention discloses a self-lubricating linear guide rail mechanism, which relates to the precision linear transmission technology and comprises a guide rail body, a sliding block is slidably mounted on the guide rail body, a plurality of ball sliding grooves are formed in the sliding block, a plurality of balls are movably arranged in the ball sliding grooves, and contact grooves are formed in the sides, close to the guide rail body, of the ball sliding grooves. A return groove is formed in the side, away from the guide rail body, of the ball sliding groove, a downward-concave through groove is formed in the middle of the return groove, and an oil storage opening is formed in the lower end of the downward-concave through groove. According to the self-lubricating linear guide rail mechanism, the combination of the downwards-concave through groove and the oil storage opening is provided, and the self-lubricating linear guide rail mechanism mainly has two functions that firstly, lubricating oil on balls passing through the downwards-concave through groove naturally slides down and returns into the accumulated lubricating oil again, the amount of the lubricating oil brought out by the balls is reduced, and the lubricating oil is prevented from being accumulated; impurities in the downward-concave through groove can be concentrated at the bottom of the downward-concave through groove and enter the oil storage opening, the impurities are stripped from the movement path of the ball, and the phenomenon that the impurities are repeatedly adhered to the ball is avoided.

Description

Technical Field

[0001] The invention relates to a precision linear transmission technology, and in particular to a self-lubricating linear guide mechanism. Background Art

[0002] As the core transmission component of precision machinery and automation equipment, linear guide mechanisms are widely used in CNC machine tools, robot joints, semiconductor equipment, medical devices and other fields. Their core function is to achieve precise guidance and load support through the relative sliding of the slider and the guide rail. Due to the frequent movement of linear guides, linear guides need to be added with lubricating oil or grease to maintain the lubrication effect between the slider and the guide rail. The lubrication performance also directly determines the movement accuracy, wear life and operation stability of the mechanism.

[0003] For example, the patent with the authorization announcement number CN117189776B and the authorization announcement date is May 28, 2024, and the name is a self-lubricating ball linear guide pair, including: a linear slide, a slider assembly, the slider assembly including a slider body and a ball, two parallel ball grooves are provided on both sides of the slider body, and a ball channel is provided corresponding to each of the ball grooves, and two rows of balls are respectively arranged in the ball grooves and the ball channel, and ball return devices are provided at both ends of the slider body to connect the ball grooves and the ball channels. The ball return devices enable the balls to circulate and roll in the slider body, and the slider body contacts the working surface of the linear slide through the surface of the ball to achieve a sliding connection. The inner wall of the ball channel is provided with a group of axially extending and circumferentially arranged capillary oil grooves, and the inner end of each capillary oil groove is provided with an axially extending oil storage hole.

[0004] Another example is the patent with the authorization announcement number CN115435010B and the authorization announcement date September 13, 2024, entitled "A Linear Guide Sub-Slider with Self-Lubricating Structure", which includes a linear guide sub-body and a slider body arranged horizontally in a factory building, wherein the slider body is arranged in a sliding engagement with the outer side of the upper end of the linear guide sub-body; a roller, whose bearing is installed inside the slider body; a rotating drum and a guide gear, both of which are installed on bearings inside the slider body; a scraper, which is movably installed inside the slider body, and an oil collecting drawer is provided below the scraper. The linear guide sub-slider with self-lubricating structure uses a sponge filled with lubricating oil so that when the roller rotates, it can be coated with the lubricating oil absorbed by the sponge, and the lubricating oil is adhered to the sponge to avoid leakage of the lubricating oil, thereby achieving self-lubrication. At the same time, it can prevent the lubricating oil contacting the linear guide sub-body from contaminating the lubricating oil stored inside the slider, thereby ensuring normal use.

[0005] The shortcoming of the existing technology is that due to the limitation of the volume of the slider itself, the amount of oil that can be stored in the oil storage hole is limited. Even if the oil output is limited by the circumferentially arranged oil storage holes and capillary oil grooves, or the oil is stored by a sponge, the ball will still bring out a lot of lubricating oil after being oiled and coat it on the guide rail, which not only wastes the lubricating oil, but also increases the frequency of adding lubricating oil. Summary of the Invention

[0006] The purpose of the present invention is to provide a self-lubricating linear guide mechanism to solve the above-mentioned deficiencies in the prior art.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] A self-lubricating linear guide mechanism includes a guide rail body, a slider is slidably mounted on the guide rail body, a plurality of ball slide grooves are provided in the slider, a plurality of balls are movably provided in the ball slide grooves, a side of the ball slide groove close to the guide rail body is a contact groove, a side of the ball slide groove away from the guide rail body is a return groove, a concave through groove is provided in the middle of the return groove, the concave through groove is filled with lubricating oil, and an oil storage port is provided at the lower end of the concave through groove.

[0009] In the above-mentioned self-lubricating linear guide mechanism, an oil inlet pipe is installed at the end of the slider, and the oil inlet pipe is connected to the return groove through a connecting groove.

[0010] In the above-mentioned self-lubricating linear guide mechanism, the oil storage port is a square structure, and the width of the oil storage port is smaller than the diameter of the ball.

[0011] In the above-mentioned self-lubricating linear guide mechanism, a discharge hole is provided on the outer wall of the slider, the discharge hole and the oil storage port are arranged in a one-to-one correspondence, the discharge hole is connected to the corresponding oil storage port, and a discharge assembly is installed on the outer side of the discharge hole.

[0012] In the above-mentioned self-lubricating linear guide mechanism, the outward side of the bottom wall of the discharge hole is inclined downward.

[0013] The above-mentioned self-lubricating linear guide mechanism, the discharge assembly includes a blocking block slidably installed in the discharge hole, and a connecting frame is formed at the outer end of the blocking block, and the connecting frame is detachably fixed to the outer wall of the slider by bolts.

[0014] The above-mentioned self-lubricating linear guide mechanism has a connecting rod formed at one end of the blocking block close to the discharge hole, the connecting rod is parallel to the bottom wall of the discharge hole, and a scraper is fixed at the inner end of the connecting rod. The lower end of the scraper is attached to the bottom wall of the discharge hole, and the width of the scraper is equal to the width of the discharge hole.

[0015] In the above-mentioned self-lubricating linear guide mechanism, the cross-section of the return groove is circular and the diameter of the cross-section of the return groove is larger than the diameter of the ball.

[0016] In the above-mentioned self-lubricating linear guide mechanism, the shape of the concave through groove is a downwardly concave arc groove, and the cross section of the concave through groove is circular, and the diameter of the cross section of the concave through groove is greater than the diameter of the ball.

[0017] In the above-mentioned self-lubricating linear guide mechanism, a sealing strip is provided on the outer side wall of the blocking block, and the sealing strip is used to seal between the blocking block and the inner wall of the discharge hole.

[0018] In the above technical solution, the present invention provides a self-lubricating linear guide mechanism, including a concave through groove arranged in the middle of the return groove, the concave through groove is filled with lubricating oil, and an oil storage port is opened at the lower end of the concave through groove. The combination of the concave through groove and the oil storage port mainly has two functions. One is to allow the lubricating oil on the ball passing through the concave through groove to slide down naturally and return to the accumulated lubricating oil, thereby reducing the amount of lubricating oil brought out by the ball; the other is to allow impurities in the concave through groove to be concentrated at the bottom of the concave through groove and enter the oil storage port, thereby peeling off the impurities from the movement path of the ball and avoiding repeated sticking of impurities on the ball. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0020] Figure 1 A schematic diagram of the three-dimensional structure of a self-lubricating linear guide mechanism provided in one embodiment of the present invention.

[0021] Figure 2 A cross-sectional view of a self-lubricating linear guide mechanism provided in accordance with an embodiment of the present invention.

[0022] Figure 3 For the present invention Figure 2 A partial enlarged view of point X.

[0023] Figure 4 For the present invention Figure 2 AA section view.

[0024] Figure 5 The present invention also provides a schematic diagram of the three-dimensional structure of a self-lubricating linear guide mechanism according to another embodiment of the present invention.

[0025] Figure 6 For the present invention Figure 5A local enlarged view of point Y.

[0026] Figure 7 A cross-sectional view of a self-lubricating linear guide mechanism provided in another embodiment of the present invention.

[0027] Figure 8 For the present invention Figure 7 A local enlarged view of point Z.

[0028] Figure 9 A partial three-dimensional structural schematic diagram of an opening limiting assembly provided in another embodiment of the present invention.

[0029] Figure 10 A partial three-dimensional structural diagram of an opening limiting assembly provided in yet another embodiment of the present invention.

[0030] Description of reference numerals:

[0031] 1. Guide rail body; 2. Slider; 21. Oil inlet pipe; 211. Connecting groove; 212. Discharge hole; 22. Discharge assembly; 221. Blocking block; 222. Connecting frame; 223. Bolt; 224. Sealing strip; 225. Connecting rod; 226. Scraper; 23. Ball bearing slide; 231. Contact groove; 232. Return groove; 233. Concave through groove; 234. Lubricating oil; 235. Oil storage port; 24. Ball bearing; 236. Semicircular groove; 237. Mounting groove; 25. Opening restriction assembly; 251. Rotating shaft; 252. Restriction plate; 253. Connecting part; 254. Pin; 255. Movable plate; 256. Pull rope; 257. Driving gear; 258. Rotating rod; 259. Spring rod; 260. Elastic block. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0033] like Figure 1-10 As shown, an embodiment of the present invention provides a self-lubricating linear guide mechanism, including a guide rail body 1, a slider 2 is slidably mounted on the guide rail body 1, a plurality of ball grooves 23 are provided in the slider 2, a plurality of balls 24 are movably provided in the ball grooves 23, the side of the ball groove 23 close to the guide rail body 1 is a contact groove 231, and the side of the ball groove 23 away from the guide rail body 1 is a return groove 232, a concave through groove 233 is provided in the middle of the return groove 232, the concave through groove 233 is filled with lubricating oil 234, and an oil storage port 235 is provided at the lower end of the concave through groove 233.

[0034] Specifically in this embodiment, the guide rail body 1 and the slider 2 are both existing technologies. The guide rail body 1 is mainly used to limit the movement of the slider 2. The guide rail body 1 and the slider 2 are not described in detail. The ball groove 23 is a groove that is connected end to end and is approximately annular. The multiple balls 24 in the ball groove 23 fit together. In this way, when the balls 24 close to one side of the guide rail body 1 move, the multiple balls 24 in the entire ball groove 23 will move together. The balls 24 in the contact groove 231 are used to contact with the guide rail to reduce the friction when the slider 2 moves. The contact groove 231 is open at one end close to the guide rail body 1, so that The purpose is to facilitate the contact between the ball 24 and the guide rail body 1. The ball 24 in the return groove 232 is mainly used to promote the synchronous movement of multiple balls 24. In addition, when the ball 24 moves into the return groove 232, the ball 24 can also be lubricated by the lubricating oil 234. The contact groove 231 and the return groove 232 are the division and definition of the ball slide 23 in this embodiment. The contact groove 231 and the return groove 232 are also prior art and are not described here. The concave through groove 233 is actually a section of the return groove 232, except that the section of the groove (the concave through groove 233) is bent downward and is concave in an arc shape. The lubricating oil 234 in the concave through groove 233 is heavy. The oil in the oil reservoir 235 is connected to the lower end of the concave groove 233, and the oil in the oil reservoir 235 is mainly used to store the lubricating oil 234 so that the lubricating oil 234 maintains a certain amount, ensuring that the amount of lubricating oil 234 can at least completely cover one ball 24 in the concave groove 233. It should also be noted that the lubricating oil 234 cannot fill the entire concave groove 233. The innovation of this embodiment is that the concave groove 233 provided in the middle of the return groove 232 is used to store the lubricating oil 234 when the slider 2 is moved. During the movement, the ball 24 that has entered the return groove 232 will immediately enter the descending channel of the concave groove 233, and the ball 24 will then come into contact with the lubricating oil 234 in the concave groove 233 and be immersed in it. The lubricating oil 234 in the concave groove 233 will lubricate the ball 24, and the slider 2 will continue to move. At this time, the oiled ball 24 enters the ascending channel. When the ball 24 leaves the accumulated lubricating oil 234, the lubricating oil 234 attached to the ball 24 slides downward under the action of gravity and returns to the concave groove 233. In this way, while ensuring that the ball 24 is fully lubricated, the amount of lubricating oil 234 brought out by the ball 24 is reduced.The oil reservoir 235 is a container that is filled with lubricating oil 234 and that is filled with oil. When the oil is in the container 234, the oil is collected and the oil is pumped out of the container 234. When the oil is in the container 234, the oil is pumped out of the container 234. When the oil is in the container 234, the oil is pumped out of the container 234. When the oil is in the container 234, the oil is pumped out of the container 234. ;

[0035] In another embodiment provided by the present invention, an oil inlet pipe 21 is installed at the end of the slider 2, and the oil inlet pipe 21 is connected to the multiple return grooves 232 through a connecting groove 211. The oil inlet pipe 21 is used to add lubricating oil 234, and the lubricating oil 234 can be squeezed into the oil inlet pipe 21 through an external device. The lubricating oil 234 entering the oil inlet pipe 21 will enter into each concave groove 233 along the connecting groove 211.

[0036] In another embodiment provided by the present invention, the oil storage port 235 is a square structure, and the width of the oil storage port 235 is smaller than the diameter of the ball 24. This is to prevent the ball 24 from entering the oil storage port 235, and also to prevent impurities entering the oil storage port 235 from contacting the ball 24.

[0037] In another embodiment provided by the present invention, a discharge hole 212 is provided on the outer wall of the slider 2, and the discharge hole 212 is preferably a square structure. The discharge hole 212 and the oil storage port 235 are arranged in a one-to-one correspondence, and the discharge hole 212 is communicated with the bottom of the corresponding oil storage port 235. A discharge assembly 22 is installed on the outer side of the discharge hole 212, and the discharge assembly 22 is used to open the connection channel between the oil storage port 235 and the outside under specific circumstances to remove impurities or replace the lubricating oil 234; the outward side of the bottom wall of the discharge hole 212 is inclined downward, so that impurities and lubricating oil 234 can move outward; the discharge assembly 22 includes a sliding member installed on the discharge hole 212. The blocking block 221 in the material hole 212 is a square structure, and a connecting frame 222 is formed at the outer end of the blocking block 221. The connecting frame 222 is detachably fixed to the outer wall of the slider 2 by a bolt 223. When the discharge hole 212 needs to be opened, the bolt 223 is rotated and removed, and the connecting frame 222 is pulled out. At this time, the connecting frame 222 drives the blocking block 221 to move outward, and the lubricating oil 234 and impurities in the discharge hole 212 will be discharged together; a sealing strip 224 is provided on the outer wall of the blocking block 221, and the sealing strip 224 is used to seal between the blocking block 221 and the inner wall of the discharge hole 212 to prevent the lubricating oil 234 from leaking.

[0038] In another embodiment provided by the present invention, a connecting rod 225 is formed at one end of the blocking block 221 close to the discharge hole 212, and the connecting rod 225 is parallel to the bottom wall of the discharge hole 212. A scraper 226 is fixed at the inner end of the connecting rod 225, and the lower end of the scraper 226 is attached to the bottom wall of the discharge hole 212. The width of the scraper 226 is equal to the width of the discharge hole 212, and the width of the connecting rod 225 is smaller than the width of the scraper 226. When the connecting rod 225 is connected, the end of the scraper 226 is fixed to the inner end of the blocking block 221. When the frame 222 moves outward, it drives the blocking block 221 to move outward synchronously. At this time, the connecting rod 225 and the scraper 226 also move outward. Since the lower end of the scraper 226 is in contact with the bottom wall of the discharge hole 212, the impurities on the bottom wall of the discharge hole 212 are scraped off by the scraper 226. That is, while the discharge hole 212 is opened, the bottom wall of the discharge hole 212 is scraped off, which speeds up the output process of impurities and prevents impurities from sticking to the bottom of the discharge hole 212.

[0039] In another embodiment provided by the present invention, the cross-section of the return groove 232 is circular and the diameter of the cross-section of the return groove 232 is slightly larger than the diameter of the ball 24. The circular cross-section of the return groove 232 is mainly to provide a limit for the ball 24 to ensure that multiple balls 24 can move smoothly. The diameter of the cross-section of the return groove 232 is slightly larger than the diameter of the ball 24 mainly to reduce the friction damage between the ball 24 and the top wall or bottom wall of the return groove 232; the shape of the concave through groove 233 is a downwardly concave arc groove, and the cross-section of the concave through groove 233 is circular, and the diameter of the cross-section of the concave through groove 233 is slightly larger than the diameter of the ball 24.

[0040] Furthermore, during the use of the guide rail body 1, if the ball 24 needs to be replaced, the slider 2 needs to be removed from the guide rail body 1, and then the end cover and the return device of the slider 2 (both of which are structures in the prior art) need to be disassembled, and finally the ball 24 needs to be poured out. This method is relatively cumbersome and has low maintenance efficiency. For this reason, this embodiment provides a further solution to replace the ball 24 using the concave through groove 233 and the oil storage port 235; in this embodiment, unlike the previous embodiment, the lower side of the concave through groove 233 has a horizontal slide groove, the horizontal slide groove is horizontally arranged, and the upper end face of the horizontal slide groove is semicircular (defined as a semicircular groove 236), the diameter of the semicircular groove 236 is larger than the diameter of the ball 24, and the lower end face of the horizontal slide groove is square The mounting groove 237 is a square structure (defined as a mounting groove 237), which continues to restrict the ball 24 through the semicircular groove 236. The mounting groove 237 is designed to be a square structure, mainly to facilitate the installation of subsequent structures. The width of the mounting groove 237 is greater than the diameter of the ball 24, and the width of the oil storage port 235 and the discharge hole 212 is also greater than the diameter of the ball 24. This design is to enable the ball 24 to slide out from the oil storage port 235 and the discharge hole 212. An opening restriction component 25 is installed in the mounting groove 237. The opening restriction component 25 is mainly used to ensure that the ball 24 can pass through the concave through-groove 233 smoothly, and when the ball 24 needs to be replaced, the opening is expanded to make the ball 24 fall out. The opening restriction component 25 includes a rotatable member that is threaded through the mounting groove There are two oppositely arranged rotating shafts 251 in 237, and a limiting plate 252 is installed on the rotating shaft 251. The limiting plate 252 is located in the mounting groove 237 as a whole. The limiting plate 252 is preferably a square plate structure. The length of the limiting plate 252 (parallel to the direction of the rotating shaft 251) is equal to the length of the mounting groove 237. In this way, the ball 24 can move smoothly to the limiting plate 252. The lower ends of the two limiting plates 252 are inclined in the direction of approaching each other. In this way, the ball 24 can move smoothly to the limiting plate 252. In addition, more preferably, the two limiting plates 252 are not symmetrically arranged, that is, the rotation amplitudes of the two limiting plates 252 are inconsistent, and the upper end surfaces of the limiting plates 252 The two sides of the limiting plate 252 are provided with inclined surfaces to facilitate contact with the ball 24. The shortest distance between the lower ends of the two limiting plates 252 is defined as a variable distance. In the initial state, the length of the variable distance is smaller than the diameter of the ball 24. In this way, the ball 24 is prevented from falling out of the variable distance. One end of the rotating shaft 251 passes through the slider 2 and extends to the outside. A driving gear 257 is fixed to the outer end of the rotating shaft 251. The two driving gears 257 are meshed with each other. A rotating rod 258 is fixed on one of the driving gears 257. The rotating rod 258 is used to drive the driving gear 257 to rotate. In addition, a spring rod 259 is installed on the outer side wall of the slider 2, and an elastic block 260 is installed on the movable end of the spring rod 259. Preferably,The elastic block 260 has a trapezoidal structure. In its initial state, under the elastic action of the spring rod 259, the elastic block 260 is engaged with one of the drive gears 257. This limits the rotation of the drive gear 257, thereby limiting the rotation range of the limiting plate 252, thereby controlling the size of the variable spacing. In addition, in this embodiment, the oil storage port 235 and the discharge hole 212 are both circular structures to facilitate the output of the ball 24. The outer side of the discharge hole 212 is sealed by a spiral block.

[0041] In this embodiment, the limiting plates 252 have two working states, namely, a normal conveying state and a maintenance discharging state. In the normal conveying state, the two limiting plates 252 maintain the initial state. After the continuously moving ball 24 moves onto the limiting plates 252, since the two limiting plates 252 are not symmetrically arranged, that is, the inclination angles of the two limiting plates 252 are inconsistent, when the ball 24 enters between the two limiting plates 252, the ball 24 itself will have a certain degree of irregular movement (generally a composite movement of rotation and sliding), and the ball 24 continues to move so as to When the ball 24 leaves the limiting plate 252, during this process, the movement of the ball 24 itself can make the lubricating oil 234 better coated on the surface of the ball 24. Obviously, when the ball 24 moves by itself, the contact position between the ball 24 and the ball 24 and the contact position between the ball 24 and the limiting plate 252 will change, ensuring the application effect of the lubricating oil 234. Moreover, when the ball 24 after irregular movement contacts the guide rail body 1 again, its contact position will also change, thereby slowing down the wear of the ball 24 and extending the life of the ball 24. When maintaining the discharge state, the ball 24 needs to be cleaned. 24 is replaced. At this time, the rotating rod 258 is toggled, and the driving gear 257 connected to the rotating rod 258 rotates and synchronously drives the other driving gear 257 to rotate. The driving gear 257 pushes the elastic block 260 to continuously reciprocate up and down under the elastic action of the spring rod 259. When it moves to a specific position (when the length of the variable spacing is greater than the ball 24), the movement of the rotating rod 258 is stopped. At this time, under the elastic action of the spring rod 259, the elastic block 260 is re-stuck on one of the driving gears 257 to limit it. At the same time, the two driving gears The movement of the wheel 257 causes the two rotating shafts 251 to move in opposite directions. The rotation of the two rotating shafts 251 drives the two limiting plates 252 to rotate outward synchronously, so that the two limiting plates 252 approach a vertical state. When the length of the variable spacing is greater than the balls 24, the balls 24 on the limiting plates 252 fall into the discharge hole 212 first. At this time, the spiral block is rotated and removed, causing the balls 24 to slide out along the discharge hole 212. At this time, the lubricating oil 234 also flows out. However, it is only necessary to replace the lubricating oil 234 later (a flexible pipe can be connected to the outside of the discharge hole 212).In addition, it should be specially noted that, obviously, the balls 24 located in the concave groove 233 will slide under the action of their own gravity and contact the horizontal slide groove and fall into the discharge hole 212. However, since the contact groove 231 is arranged horizontally, it is obvious that the balls 24 in the contact groove 231 cannot naturally move into the concave groove 233. Therefore, the continuous reciprocating motion of the slider 2 can cause the balls 24 in the contact groove 231 to move into the concave groove 233. Even if the balls 24 in the concave groove 233 are not fitted together, under the reciprocating motion of the slider 2, the balls 24 can still rely on inertia to enter the concave groove 233. In this way, all the balls 24 can be discharged from the discharge hole 212 in the middle of the concave groove 233. Obviously, the discharge hole 212 in this embodiment can discharge impurities and lubricating oil 234, or it can discharge impurities, lubricating oil 234 and balls 24. In summary, the limiting plate 252 in this embodiment has three main functions. First, it limits the conveyance of the balls 24, allowing them to move normally and sequentially within the concave grooves 233. Furthermore, impurities will flow into the discharge hole 212 along the limiting plate. Second, by controlling the rotational amplitude of the limiting plate 252, the balls 24 can fall out of the limiting plate 252 and into the discharge hole 212, thereby allowing for quick removal of the balls 24 without disassembling the slider 2 (the balls 24 can also be injected sequentially in the reverse direction through the discharge hole 212), ensuring efficient maintenance. Third, the asymmetric limiting plate 252 causes the balls 24 to move irregularly within the horizontal chute, thereby ensuring the effective application of the lubricating oil 234 and varying the contact position between the balls 24 and the guide rail.

[0042] Furthermore, since the discharge hole 212 is opened in the middle position of the concave through groove 233, the balls 24 need to be discharged in sequence and the sizes of the mounting groove 237 and the discharge hole 212 are limited. Therefore, the balls 24 may be stuck in the mounting groove 237 when being discharged. When there are balls 24 in the contact groove 231, the reciprocating slider 2 can also be used to make the balls 24 in the contact groove 231 impact the balls 24 in the concave through groove 233, so that multiple balls 24 slide in the concave through groove 233 to avoid getting stuck. However, when there are no balls 24 in the contact groove 231, it is difficult to solve the problem of the balls 24 being stuck in the mounting groove 237. Therefore, this embodiment provides a further solution to solve the above technical problems. Problem, in this embodiment, the limiting plate 252 is changed to a split structure, the limiting plate 252 includes a connecting portion 253 fixed on the rotating shaft 251, the connecting portion 253 is a block structure, the lower end of the connecting portion 253 is installed with a pin shaft 254, and the two ends of the pin shaft 254 are rotatably installed with movable plates 255, and a limiting spring (not shown in the figure) is connected between the two movable plates 255. The limiting elasticity is located on the side of the movable plate 255 away from the ball 24. The limiting spring is used to maintain the rotation amplitude of the movable plate 255, so that the rotation amplitude of the two movable plates 255 is consistent and the upper ends of the two movable plates 255 are located in the same inclined plane. In addition, the movable plate 255 is away from the ball When the limiting plate 252 is rotated in the direction of approaching each other (from the initial state), the two movable plates 255 will rotate under the restriction of the pull rope 256, so that the limiting plate 252 becomes a V-shaped structure. At this time, when the limiting plate 252 contacts the ball 24, it will push the ball 24 to slide in the concave through groove 233. Specifically, when the ball 24 is stuck, the rotating rod 258 can be continuously moved back and forth. When the limiting plate 252 rotates inwardly at an angle greater than its initial state and the horizontal plane When the angle between them is 0.05, the connecting portion 253 and the pin 254 continue to rotate inward. At this time, since the pull rope 256 cannot continue to move, the two movable plates 255 are forced to rotate, so that the limiting plate 252 as a whole becomes a V-shaped structure. When the V-shaped limiting plate 252 contacts the ball 24, the ball 24 can be pushed to slide in the concave groove 233. In this way, the ball 24 in contact with the movable plate 255 is squeezed to slide, so that the ball 24 in the appropriate position enters the discharge hole 212. By improving the above-mentioned limiting plate 252 and utilizing the opening limiting component 25, the limiting plate 252 also has the function of squeezing the ball 24 to slide in the concave groove 233 to avoid the ball 24 getting stuck.

[0043] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims.

Claims

1. A self-lubricating linear guide mechanism, comprising a guide rail body, on which a slider is slidably mounted, characterized in that: A plurality of ball sliding grooves are provided in the slider, and a plurality of balls are movably arranged in the ball sliding grooves. The side of the ball sliding groove close to the guide rail body is a contact groove, and the side of the ball sliding groove away from the guide rail body is a return groove. A concave through groove is provided in the middle of the return groove, and the concave through groove is filled with lubricating oil. An oil storage port is provided at the lower end of the concave through groove.

2. A self-lubricating linear guide mechanism according to claim 1, characterized in that: An oil inlet pipe is installed at the end of the sliding block, and the oil inlet pipe is connected to the return groove through a connecting groove.

3. The self-lubricating linear guide mechanism according to claim 1, characterized in that: The oil storage port is a square structure, and the width of the oil storage port is smaller than the diameter of the ball.

4. The self-lubricating linear guide mechanism according to claim 1, characterized in that: A discharge hole is provided on the outer wall of the slider, and the discharge hole and the oil storage port are arranged in a one-to-one correspondence. The discharge hole is communicated with the corresponding oil storage port, and a discharge assembly is installed outside the discharge hole.

5. The self-lubricating linear guide mechanism according to claim 4, characterized in that: The outward side of the bottom wall of the discharge hole is inclined downward.

6. The self-lubricating linear guide mechanism according to claim 4, characterized in that: The discharging assembly includes a blocking block slidably mounted in the discharging hole, and a connecting frame is formed on an outer end of the blocking block. The connecting frame is detachably fixed to the outer side wall of the sliding block by bolts.

7. The self-lubricating linear guide mechanism according to claim 6, characterized in that: A connecting rod is formed at one end of the blocking block close to the discharge hole, and the connecting rod is parallel to the bottom wall of the discharge hole. A scraper is fixed at the inner end of the connecting rod, and the lower end of the scraper is attached to the bottom wall of the discharge hole. The width of the scraper is equal to the width of the discharge hole.

8. The self-lubricating linear guide mechanism according to claim 3, characterized in that: The cross section of the return groove is circular and the diameter of the cross section of the return groove is larger than the diameter of the ball.

9. The self-lubricating linear guide mechanism according to claim 1, characterized in that: The shape of the concave through groove is a downwardly concave arc groove, and the cross section of the concave through groove is circular. The diameter of the cross section of the concave through groove is greater than the diameter of the ball.

10. The self-lubricating linear guide mechanism according to claim 6, characterized in that: A sealing strip is provided on the outer side wall of the blocking block, and the sealing strip is used to seal between the blocking block and the inner wall of the discharge hole.

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