Four-guide box-in-box structure

Abstract

The application discloses a four-guide-rail box-in-box structure and relates to the technical field of numerical control machine tool machining. The four-guide-rail box-in-box structure comprises a saddle and a spindle box. The saddle is fixed with a sliding block, and the spindle box is fixed with a sliding rail. A lubricating piece and a triggering mechanism are arranged on the sliding rail. The lubricating piece is used for lubricating the sliding block. Triggering mechanisms are arranged on the two sides of the lubricating piece. When the sliding block simultaneously touches the two triggering mechanisms, the lubricating piece operates. The four-guide-rail box-in-box structure provided by the application is characterized in that, during the process that the sliding block passes through the lubricating piece, the sliding block will touch the two triggering mechanisms in sequence, so that the lubricating piece can be moved to the position between the sliding block and the sliding rail to trigger and lubricate the sliding block. The lubricating piece is prevented from operating when it just contacts the sliding block without being moved to the position between the sliding block and the sliding rail, and the lubricating oil in the lubricating piece is prevented from being rolled and coated on the outer wall of the sliding block.

Description

Technical Field

[0001] This invention relates to the field of CNC machine tool processing technology, specifically to a four-guide rail box-in-box structure. Background Technology

[0002] The cradle five-axis machining center is a high-precision CNC machining equipment widely used in aerospace, automotive manufacturing, mold making, and other fields. Its main feature is its ability to perform complex machining in multiple axes, providing high efficiency and high precision.

[0003] For example, the patent document with application publication number CN117506546B, application publication date April 12, 2024, entitled "A Lubrication Device for a Slider in a Gantry Machining Center", includes a base, a gantry machining device mounted on the base, a guide rail mounted on the base, and a slider slidably mounted on the guide rail. The slider is equipped with a cleaning component for cleaning debris on the guide rail and scraping and recycling excess lubricating oil. This patent effectively solves the problem that debris sticking to the guide rail of a gantry machining center affects the sliding of the slider on the guide rail.

[0004] Existing five-axis machining centers are equipped with multiple sets of guide rail structures. During use, it is necessary to frequently add lubricating oil to these multiple sets of guide rail structures to ensure their normal operation. Obviously, adding lubricating oil to the multiple sets of guide rails on a five-axis machining center is quite cumbersome. Summary of the Invention

[0005] The purpose of this invention is to provide a four-rail box-in-box structure to overcome the above-mentioned shortcomings in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A four-rail box-type structure includes a saddle and a spindle box. A slider is fixed on the saddle, and a slide rail is fixed on the spindle box. The slide rail is provided with:

[0008] A lubricating component for lubricating the slider;

[0009] The lubricating component is equipped with triggering mechanisms on both sides. When the slider simultaneously contacts the two triggering mechanisms, the lubricating component operates.

[0010] In the aforementioned four-rail box-type structure, the saddle includes two detachable U-shaped plates, each with four sliders fixed on it. The main shaft box has four slide rails fixed on it, with one slide rail adapted to two sliders.

[0011] In the aforementioned four-rail box structure, the lubricant includes an adapter groove constructed within the slide rail, and the slide rail has a through hole communicating with the adapter groove. The lubricant is slidably connected within the adapter groove.

[0012] In the aforementioned four-rail box structure, the slide rail has an oil storage channel, the adapter groove has a branch pipe communicating with the oil storage channel, the lubrication component includes a movable tube slidably sleeved on the branch pipe, a ball bearing is provided at the end of the movable tube away from the branch pipe, and a first elastic element is provided inside the movable tube to force the ball bearing to seal the end of the movable tube.

[0013] In the aforementioned four-rail box structure, the first elastic element includes an annular plate slidably connected inside the movable tube. An arc-shaped plate adapted to the ball bearing is constructed on the annular plate, and an elastic sheet is fixed on the annular plate. The other end of the elastic sheet is fixed to the inner wall of the movable tube.

[0014] In the aforementioned four-rail box structure, the triggering mechanism includes a movable groove constructed on the slide rail, a movable block slidably connected in the movable groove, one end of the movable block being constructed as a hemisphere and extending outside the movable groove, and a second elastic element for forcing the movable block away from the movable groove is provided in the movable groove.

[0015] In the aforementioned four-rail box structure, a connecting groove is constructed between the movable groove and the adapter groove. A linkage block is slidably connected in the connecting groove. Both ends of the linkage block are constructed as wedge-shaped ends. A connecting ring is fixed on the outer wall of the movable tube. A third elastic element is provided in the adapter groove to force the connecting ring to approach the through hole. A wedge-shaped surface is constructed on the connecting ring, and a wedge-shaped groove is constructed on the movable block.

[0016] In the aforementioned four-rail box structure, the elastic force of the third elastic element is less than that of the second elastic element. When the slider does not contact the movable block, the wedge groove and the linkage block can force the connecting ring to squeeze the third elastic element, thereby forcing the movable tube away from the through hole. When the slider simultaneously contacts both movable blocks, the third elastic element and the connecting ring can force the linkage block to insert into the wedge groove, thereby forcing the movable tube closer to the through hole and lubricating the slider with balls.

[0017] In the aforementioned four-rail box structure, the lubricating element and the triggering mechanism are alternately arranged along the length of the slide rail.

[0018] In the aforementioned four-rail box structure, wedge-shaped grooves are constructed on both opposite sides of the movable block.

[0019] In the above technical solution, the present invention provides a four-rail box-in-box structure. During the process of the slider passing the lubricating component, the slider will successively contact two triggering mechanisms, so that the lubricating component can be triggered and lubricated when it moves between the slider and the slide rail. This avoids the operation when the lubricating component just contacts the slider but has not moved between the slider and the slide rail, and avoids the lubricating oil in the lubricating component being rolled onto the outer wall of the slider. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0021] Figure 1 This is a schematic diagram of the overall structure provided in an embodiment of the present invention;

[0022] Figure 2 A schematic diagram of the saddle structure provided in an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of a slide rail structure provided in another embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the adapter slot structure provided in another embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of a movable tube structure provided in another embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of a linkage block structure provided in another embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of the internal structure of the active tube provided in another embodiment of the present invention;

[0028] Figure 8 This is a schematic diagram of a slide rail structure provided in another embodiment of the present invention;

[0029] Figure 9 This is a schematic diagram of a sliding rod structure provided in another embodiment of the present invention;

[0030] Figure 10 This is a schematic diagram of the first wedge-shaped part structure provided in another embodiment of the present invention;

[0031] Figure 11 This is a schematic diagram of the second wedge-shaped part structure provided in another embodiment of the present invention;

[0032] Figure 12This is a schematic diagram of a baffle structure provided in another embodiment of the present invention;

[0033] Figure 13 This is a schematic diagram of a connecting rod structure provided in another embodiment of the present invention.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. Saddle; 101. U-shaped plate; 2. Spindle box; 3. Slider; 4. Slide rail; 5. Through hole; 6. Oil storage channel; 7. Branch pipe; 8. Movable pipe; 9. Ball bearing; 10. Annular plate; 11. Arc plate; 12. Elastic sheet; 13. Movable block; 14. Hemisphere; 15. Second elastic element; 16. Linkage block; 17. Connecting ring; 18. Third elastic element; 19. Wedge surface; 20. Wedge groove; 21. Slide rod; 22. First wedge part; 23. Second wedge part; 24. Third wedge part; 25. Baffle; 26. Connecting rod. Detailed Implementation

[0036] 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.

[0037] Reference Figure 1-13 This invention provides a four-rail box structure, including a saddle 1 and a spindle box 2. A slider 3 is fixed on the saddle 1, and a slide rail 4 is fixed on the spindle box 2. A lubricating element and a triggering mechanism are provided on the slide rail 4. The lubricating element is used to lubricate the slider 3. A triggering mechanism is provided on both sides of the lubricating element. When the slider 3 simultaneously abuts against the two triggering mechanisms, the lubricating element operates.

[0038] Specifically, the cradle five-axis machine tool, also known as a five-axis machining center, is a high-tech, high-precision machining center specifically designed for processing complex curved surfaces. It features high efficiency and high precision. For the cradle five-axis machine tool, its spindle box 2 is centrally mounted on the saddle 1 via guide rails (i.e., the slider 3 and slide rail 4 structure). The saddle 1 is suspended on the crossbeam via guide rails, and the crossbeam is mounted on the guide rails on the side wall of the machine bed, so that the spindle box 2 can move in multiple axes on the machine bed. Thus, the workpiece clamped on the machine bed is processed by the cutting tool on the spindle box 2. All of the above are existing technologies and will not be elaborated here. The innovation of this invention lies in the provision of a lubricating element and a triggering mechanism on the slide rail 4. The lubricating element can be a ball bearing lubrication structure as in the prior art, which can roll lubricating oil onto the slider 3 through contact and relative rolling. The triggering mechanism can be a sensor structure as in the prior art. Triggering mechanisms are provided on both opposite sides of the lubricating element. As the slider 3 passes the lubricating element, the slider 3 will first contact one triggering mechanism, then the lubricating element, and finally the other triggering mechanism. This arrangement ensures that the lubricating element can only be triggered and lubricate the slider 3 when it moves between the slider 3 and the slide rail 4, thus avoiding the operation of the lubricating element just after contacting the slider 3 without moving between the slider 3 and the slide rail 4, and minimizing the amount of lubricating oil in the lubricating element that rolls onto the outer wall of the slider 3 (the side that does not contact the slide rail 4, which would cause waste and contamination).

[0039] In another embodiment of the present invention, the saddle 1 further includes two detachable U-shaped plates 101, each with four sliders 3 fixed on it. The spindle box 2 is fixed with four slide rails 4, one of which is adapted to two sliders 3. Specifically, the two U-shaped plates 101 are detachably connected by bolts. When the two U-shaped plates 101 are fixed together, they form a saddle 1 housing that surrounds the spindle box 2 (this is a split-type box-within-a-box structure). The four slide rails 4 are symmetrically arranged on two opposite sides of the spindle box 2. Four sliders 3 are fixed to the inner wall of one U-shaped plate 101, and the four sliders 3 are arranged on two slide rails 4 on one side of the spindle box 2, meaning two sliders 3 slide on one slide rail 4. This arrangement can improve the spindle height. Stability of spindle box 2: In the prior art, two slide rails 4 are generally set between spindle box 2 and saddle 1, and the two slide rails 4 are concentrated on the side of spindle box 2 near saddle 1. This setting makes the rigidity of spindle box 2 weak, and the vibration amplitude of the tool on spindle box 2 is too large during cutting motion. In this embodiment, four slide rails 4 are set on spindle box 2, and the four slide rails 4 are respectively set on two opposite sides of spindle box 2, so as to increase the rigidity of spindle box 2 and minimize the vibration amplitude of the tool on spindle box 2.

[0040] Furthermore, the lubricant includes an adapter groove constructed within the slide rail 4, and the slide rail 4 has a through hole 5 communicating with the adapter groove. The lubricant is slidably connected within the adapter groove. Specifically, when the slider 3 is not simultaneously contacting the two triggering mechanisms, the lubricant needs to be retracted into the slide rail 4 to minimize direct contact between the lubricant and the slider 3. For this purpose, the adapter groove and through hole 5 are provided. The lubricant is slidably positioned within the adapter groove so that when the slider 3 simultaneously contacts the two triggering mechanisms, the lubricant is controlled to move out of the adapter groove and fit into the through hole 5 (a driving structure, such as a piezoelectric actuator, can be installed within the adapter groove to control the movement of the lubricant based on the operation of the two triggering mechanisms), thereby lubricating the slider 3 moving relative to the slide rail 4.

[0041] Furthermore, the slide rail 4 is provided with an oil storage channel 6, the adapter groove is provided with a branch pipe 7 that communicates with the oil storage channel 6, the lubricating component includes a movable pipe 8 that is slidably sleeved on the branch pipe 7, a ball bearing 9 is provided at the end of the movable pipe 8 away from the branch pipe 7, and a first elastic element is provided in the movable pipe 8 to force the ball bearing 9 to block the end of the movable pipe 8. Specifically, the oil storage channel 6 is arranged along the length of the slide rail 4, and the oil storage channel 6 is filled with lubricating oil; the branch pipe 7 is fixed in the fitting groove along the thickness direction of the slide rail 4, and the inner diameter of the movable pipe 8 is adapted to the outer diameter of the branch pipe 7 so that the movable pipe 8 can be slidably sleeved on the branch pipe 7 and slide along the thickness direction of the slide rail 4. An opening is constructed on the end of the movable pipe 8 away from the branch pipe 7, and the ball bearing 9 is located in the movable pipe 8 and can seal the opening under the action of the first elastic element; with this arrangement, when the movable pipe 8 is retracted into the fitting groove, the ball bearing 9 seals the opening, and the lubricating oil in the oil storage channel 6 cannot flow out through the opening; when the movable pipe 8 is away from the branch pipe 7 and fits against the inner wall of the through hole 5, the ball bearing 9 protrudes from the slide rail 4 from the opening and the through hole 5. At this time, the slider 3 abuts against the ball bearing 9, which can force the ball bearing 9 to open the opening so that the lubricating oil can flow through the ball bearing 9 to the slider 3, thereby lubricating the slider 3.

[0042] In the above embodiments, the first elastic element can be a spring structure. Preferably, the first elastic element includes an annular plate 10 slidably connected inside the movable tube 8. An arc-shaped plate 11 adapted to the ball bearing 9 is constructed on the annular plate 10. An elastic sheet 12 is fixed on the annular plate 10, and the other end of the elastic sheet 12 is fixed to the inner wall of the movable tube 8. Specifically, the diameter of the annular plate 10 is larger than the diameter of the ball bearing 9, and the diameter of the ball bearing 9 is larger than the opening diameter. Both ends of the elastic sheet 12 are fixed to the inner wall of the movable tube 8 and the annular plate 10, respectively, so that the annular plate 10 is forced to approach the opening through the elastic sheet 12, thereby forcing the ball bearing 9 to block the opening through the arc-shaped plate 11. When the slider 3 abuts against the ball bearing 9, the arc-shaped plate 11 and the annular plate 10 are abutted and squeeze the elastic sheet 12, thereby forcing the ball bearing 9 to open the opening. At the same time, the ball bearing 9 can rotate between the arc-shaped plate 11 and the slider 3. In this way, the rotation of the ball bearing 9 can roll the lubricating oil onto the slider 3, thereby reducing friction and improving lubrication efficiency.

[0043] In another embodiment of the present invention, as an alternative to the sensor structure used in the triggering mechanism, the triggering mechanism further includes a movable groove constructed on the slide rail 4. A movable block 13 is slidably connected in the movable groove. One end of the movable block 13 is constructed as a hemisphere 14 and extends outside the movable groove. A second elastic element 15 is provided in the movable groove to force the movable block 13 away from the movable groove. A connecting groove is constructed between the movable groove and the adapter groove. A linkage block 16 is slidably connected in the connecting groove. Both ends of the linkage block 16 are constructed as wedge-shaped ends. A connecting ring 17 is fixed on the outer wall of the movable tube 8. A third elastic element 18 is provided in the adapter groove to force the connecting ring 17 closer to the through hole 5. A wedge-shaped surface 19 is constructed on the connecting ring 17, and a wedge-shaped groove 20 is constructed on the movable block 13. Specifically, both the movable block 13 and the movable groove are constructed as non-rotating bodies, meaning that the movable block 13 can only slide relative to each other within the movable groove and cannot rotate relative to each other; the second elastic element 15 can be a spring structure from the prior art, with one end fixed to the inner wall of the movable groove and the other end fixed to the movable block 13; one end of the movable groove is constructed with a hole adapted to the hemisphere 14, so that the hemisphere 14 at one end of the movable block 13 can protrude from the slide rail 4 through the hole under the action of the second elastic element 15. When the slider 3 passes the hemisphere 14, it will abut against the hemisphere 14 to force the hemisphere 14 and the movable groove to retract into the movable groove (during which the second elastic element...). When the slider 3 is separated from the hemisphere 14 (15 is squeezed), the movable block 13 will reset under the action of the second elastic element 15 and drive the hemisphere 14 to expose the slide rail 4; the two ends of the connecting groove are respectively connected to the movable groove and the adapter groove, and the wedge-shaped ends of the linkage block 16 are symmetrically arranged. One end is located in the adapter groove and is adapted to the wedge surface 19 on the connecting ring 17, and the other end is located in the movable groove and is adapted to the wedge groove 20 on the movable block 13; the third elastic element 18 can be a spring structure in the prior art, which can be sleeved on the branch pipe 7. One end of the third elastic element 18 is fixed on the inner wall of the adapter groove, and the other end is fixed on the connecting ring 17.

[0044] Both sides of the adapter groove are provided with movable grooves, and each movable groove is provided with a movable block 13 and a linkage block 16 structure, that is, a linkage block 16 is provided on both sides of a connecting ring 17; the elastic force of the third elastic element 18 is less than the elastic force of the second elastic element 15. When the slider 3 does not abut against the movable block 13, the wedge groove 20 and the linkage block 16 can force the connecting ring 17 to squeeze the third elastic element 18, so as to force the movable tube 8 away from the through hole 5 (the elastic force of the second elastic element 15 is greater than the elastic force of the third elastic element 18, so that the wedge groove 20 can abut against the end of the linkage block 16 to force the linkage block 16 to move towards the adapter groove, thereby forcing the connecting ring 17 to squeeze the third elastic element 18 and drive the movable tube 8 away from the through hole 5, such as Figure 4 and Figure 5(As shown); When the slider 3 simultaneously abuts against the two movable blocks 13, the third elastic element 18 and the connecting ring 17 can force the linkage block 16 to insert into the wedge groove 20, so as to force the movable tube 8 to approach the through hole 5 and lubricate the slider 3 through the ball 9 (when the slider 3 forces one movable block 13 into the movable groove, the other movable block 13 can force the movable tube 8 away from the through hole 5 through the wedge groove 20 and the linkage block 16; when the slider 3 simultaneously forces both movable blocks 13 into their corresponding movable blocks 13, the two linkage blocks 16 correspond to the two wedge grooves 20 respectively, so that the third elastic element 18 can force the connecting ring 17 to abut against the two linkage blocks 16, so that the two linkage blocks 16 are inserted into the corresponding wedge grooves 20, and at the same time the connecting ring 17 drives the movable tube 8 to approach the through hole 5, as shown). Figure 6 (As shown).

[0045] The advantage of this arrangement is that, during the process of slider 3 passing the lubricating component, slider 3 will first abut against two movable blocks 13 (hemispherical 14). When slider 3 abuts against only one movable block 13, the movable tube 8 is located on the side away from the through hole 5 under the action of the other movable block 13. When slider 3 abuts against two movable blocks 13 at the same time, the movable tube 8 can approach the through hole 5 under the action of the third elastic element 18 and lubricate slider 3 through the ball 9. This allows the lubricating component to run passively when it is between slider 3 and slide rail 4, and avoids the lubricating component releasing lubricating oil directly when it just contacts slider 3 and is still outside slider 3, which would cause lubricating oil to be applied to the outside of slider 3, resulting in waste and pollution.

[0046] In another embodiment of the present invention, the lubricating element and the triggering mechanism are alternately arranged along the length of the slide rail 4. Specifically, in the above embodiment, a triggering mechanism is provided on both sides of a lubricating element, that is, one lubricating element corresponds to two triggering mechanisms; in this embodiment, as shown... Figure 8 As shown, lubricating components and triggering mechanisms are alternately arranged along the length of the slide rail 4, with the triggering mechanism located near the end of the slide rail 4 (ensuring that triggering mechanisms are provided on both sides of the lubricating components). The movable block 13 has wedge-shaped grooves 20 on both opposite sides. In this embodiment, wedge-shaped grooves 20 and linkage blocks 16 can be provided on both sides of the movable block 13. When the slider 3 forces a movable block 13 into its movable groove, the linkage blocks 16 on both sides of the movable block 13 can enter the wedge-shaped grooves 20 on both sides of the movable block 13 (that is, one movable block 13 can be used simultaneously to trigger the lubricating components on both sides). With this arrangement, as the slider 3 moves from one end of the slide rail 4 to the other, multiple movable blocks 13 can be triggered sequentially to lubricate the slider 3 sequentially, thus providing more comprehensive lubrication for the slide rail 4 and the slider 3. Simultaneously, one triggering mechanism can be used to trigger two adjacent lubricating components simultaneously, reducing device cost while making the structure more compact and further improving lubrication efficiency.

[0047] In the above embodiments, the lubricating element and the triggering mechanism can operate with the relative movement of the slider 3 and the slide rail 4, which can maintain a good lubrication effect between the slider 3 and the slide rail 4 at all times. However, the slider 3 needs to abut against several movable blocks 13 during operation, which obviously affects the operation of the slider 3. Furthermore, the slide rail 4 is constructed with a through groove along its length, and a slide rod 21 is slidably connected in the through groove. The slide rod 21 passes through both the fitting groove and the movable groove. The slide rod 21 and the movable tube 8, the slide rod 21 and the movable blocks 13 are all staggered, that is, the movable tube 8 and the movable blocks 13 do not interact with each other during operation. The slide bar 21 interferes with the movement. The slide bar 21 is constructed with a first wedge-shaped part 22 and a second wedge-shaped part 23. The outer wall of the movable block 13 is constructed with a third wedge-shaped part 24 (the movable groove allows the third wedge-shaped part 24 to slide inside it). The first wedge-shaped part 22 is adapted to the wedge-shaped surface 19 on the connecting ring 17. When the slide bar 21 moves, it can abut against the wedge-shaped surface 19 through the first wedge-shaped part 22 to force the connecting ring 17 and the movable tube 8 into the adapted groove. The second wedge-shaped part 23 is adapted to the third wedge-shaped part 24. When the slide bar 21 moves, it can abut against the third wedge-shaped part 24 through the second wedge-shaped part 23 to force the movable block 13 into the movable groove. When sliding along the through groove, the slide rod 21 has a first position and a second position (a lead screw structure can be provided at the end of the slide rail 4 to drive the slide rod 21 to slide in the through groove, thereby switching the position of the slide rod 21. Driving the slide rod 21 to slide linearly through the lead screw structure is existing technology, not shown, and will not be described here). In the first position, the first wedge 22 and the wedge surface 19 are separated, and the first wedge 22 does not affect the movement of the connecting ring 17 and the movable tube 8. The second wedge 23 and the third wedge 24 are separated, and the second wedge 23 does not affect the movement of the third wedge 24 and the movable block 13. When lubrication of the slider 3 is not required... During sliding, the control lever 21 slides along the through groove to the second position. During this process, the first wedge-shaped part 22 abuts against the wedge-shaped surface 19 to force the movable tube 8 into the fitting groove, and the second wedge-shaped part 23 abuts against the third wedge-shaped part 24 to force the movable block 13 into the movable groove. With this configuration, when lubrication of the slider 3 is not required, switching the lever 21 to the second position will drive the movable block 13 and the movable tube 8 into the slide rail 4, thereby reducing the friction between the slider 3 and the slide rail 4. Furthermore, during the switching of the lever 21 to the second position, regardless of whether the lubricating component and the triggering mechanism are in operation (e.g., ...), the lubrication is maintained. Figure 9 and Figure 10 In the middle, the lubricating component is inserted into the adapter groove. At this time, the movement of the slide rod 21 can force the movable block 13 and the movable tube 8 to retract into the slide rail 4, such as... Figure 11As shown, the lubricating element is in operation. At this time, the movement of the slide bar 21 can also force the movable block 13 and the movable tube 8 into the slide rail 4. The slide bar 21 can force the movable block 13 and the movable tube 8 into the slide rail 4 until lubrication of the slider 3 is required. Then, switching the slide bar 21 back to the first position will allow the lubricating element to operate based on the trigger mechanism. The advantage is that by controlling the position of the slide bar 21, the states of the lubricating element and the trigger mechanism can be switched, thereby reducing the influence of the movable block 13 on the slider 3 when lubrication is not required.

[0048] Furthermore, in the above embodiment, when the lubricant is not between the slider 3 and the slide rail 4, the movable tube 8 is in the position of being retracted into the adapter groove. At this time, the through hole 5 is open and exposed, which allows dust and other impurities to enter the adapter groove. Obviously, the dust and impurities will affect the operation of the lubricant. To address this, baffles 25 are slidably arranged in the adapter groove. Two baffles 25 are symmetrically arranged in the adapter groove, and both baffles 25 are slidably connected to the through hole 5. When the two baffles 25 approach each other, they can block the through hole 5. When the two baffles 25 move away from each other, they can open the through hole 5 to expose the ball 9. Connecting rods 26 are hinged to the outer walls on opposite sides of the movable tube 8. The other ends of the two connecting rods 26 are respectively hinged to the two baffles 25. With this arrangement, when the movable tube 8 approaches the through hole 5, the connecting rods 26 can force the two baffles 25 to move away from each other to open the through hole 5. When the movable tube 8 is retracted into the adapter groove, the connecting rods 26 can drive the two baffles 25 to approach each other to block the through hole 5. The advantage is that the connecting rod 26 can passively drive the two baffles 25 to open or close, thereby sealing the through hole 5 when the lubricating component is not running, and minimizing the entry of impurities into the through hole 5 that could affect the operation of the lubricating component.

[0049] In various embodiments of the present invention, the lubricating element and the triggering mechanism can be simultaneously disposed on the slide rail 4 to cooperate with the slider 3, or simultaneously disposed on the slider 3 to cooperate with the slide rail 4.

[0050] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A four-rail box-type structure, comprising a saddle and a spindle box, wherein a slider is fixed on the saddle and a slide rail is fixed on the spindle box, characterized in that, The slide rail is provided with: A lubricating component for lubricating the slider; The lubricating component is equipped with triggering mechanisms on both sides. When the slider simultaneously contacts the two triggering mechanisms, the lubricating component operates. The lubricant includes an adapter groove constructed in a slide rail, the slide rail having a through hole communicating with the adapter groove, and the lubricant being slidably connected in the adapter groove. The slide rail has an oil storage channel, the adapter groove has a branch pipe that communicates with the oil storage channel, the lubricating component includes a movable tube that is slidably sleeved on the branch pipe, a ball is provided at the end of the movable tube away from the branch pipe, and a first elastic element is provided inside the movable tube to force the ball to seal the end of the movable tube. The triggering mechanism includes a movable groove constructed on a slide rail, a movable block slidably connected in the movable groove, one end of the movable block being constructed as a hemisphere and extending outside the movable groove, and a second elastic element for forcing the movable block away from the movable groove is provided in the movable groove. A connecting groove is constructed between the movable groove and the adapter groove. A linkage block is slidably connected in the connecting groove. Both ends of the linkage block are constructed as wedge-shaped ends. A connecting ring is fixed on the outer wall of the movable tube. A third elastic element is provided in the adapter groove to force the connecting ring to approach the through hole. A wedge-shaped surface is constructed on the connecting ring. A wedge-shaped groove is constructed on the movable block.

2. The four-rail box-in-box structure according to claim 1, characterized in that, The saddle includes two detachable U-shaped plates, each with four sliders fixed on it. The spindle box has four slide rails fixed on it, with one slide rail adapted to two sliders.

3. The four-rail box-in-box structure according to claim 1, characterized in that, The first elastic element includes an annular plate slidably connected inside the movable tube. The annular plate is configured with an arc-shaped plate adapted to the ball bearing. An elastic sheet is fixed on the annular plate, and the other end of the elastic sheet is fixed to the inner wall of the movable tube.

4. The four-rail box-in-box structure according to claim 1, characterized in that, The elastic force of the third elastic element is less than that of the second elastic element. When the slider does not contact the movable block, the wedge groove and the linkage block can force the connecting ring to squeeze the third elastic element, thereby forcing the movable tube away from the through hole. When the slider simultaneously contacts both movable blocks, the third elastic element and the connecting ring can force the linkage block to insert into the wedge groove, thereby forcing the movable tube to approach the through hole and lubricating the slider with balls.

5. The four-rail box-in-box structure according to claim 1, characterized in that, Along the length of the slide rail, the lubricant and the triggering mechanism are alternately arranged.

6. The four-rail box-in-box structure according to claim 5, characterized in that, The movable block has wedge-shaped grooves on both opposite sides.

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