Four-guide-rail box-in-box structure

Abstract

The invention 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, a sliding block is fixed on the saddle, a sliding rail is fixed on the spindle box, a lubricating piece and a trigger mechanism are arranged on the sliding rail, and the lubricating piece is used for lubricating the sliding block; and trigger mechanisms are arranged on the two sides of the lubricating piece, and when the sliding block abuts against the two trigger mechanisms at the same time, the lubricating piece runs. According to the four-guide-rail box-in-box structure, in the process that the sliding blocks pass through the lubricating pieces, the sliding blocks abut against the two triggering mechanisms in sequence, so that the lubricating pieces can be triggered and lubricate the sliding blocks only when moving between the sliding blocks and the sliding rails, and the situation that the lubricating pieces run when the lubricating pieces make contact with the sliding blocks but not moving between the sliding blocks and the sliding rails is avoided as much as possible; lubricating oil in the lubricating piece is prevented from being coated on the outer wall of the sliding block as much as possible.

Description

Technical Field

[0001] The invention relates to the technical field of numerical control machine tool processing, and in particular to a box-in-box structure with four guide rails. Background Art

[0002] The cradle five-axis machine is a high-precision CNC machining equipment, which is widely used in aerospace, automobile manufacturing, mold processing and other fields. Its main feature is that it can perform complex processing in multi-axis directions, providing high efficiency and high precision processing capabilities.

[0003] For example, the patent document with application publication number CN117506546B and application publication date April 12, 2024, and titled "A Slider Lubrication Device for a Gantry Machining Center", includes a base, on which a gantry processing device is provided, a guide rail is provided on the base, and a slider is provided slidingly on the guide rail, and the slider is provided with a cleaning part for cleaning debris on the guide rail and scraping off and recovering excess lubricating oil; this patent effectively solves the problem that debris will stick to the guide rail of the gantry machining center, affecting the sliding of the slider on the rail.

[0004] Existing five-axis machining centers are equipped with multiple guide rail structures. When in use, they need to be frequently filled with lubricating oil to ensure the normal operation of the guide rail structures. Obviously, it is more cumbersome to fill the multiple guide rails on the five-axis machining centers with lubricating oil. Summary of the invention

[0005] The object of the present invention is to provide a four-guide rail box-in-box structure to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A four-guide box-in-box structure comprises a saddle and a spindle box, a slider is fixed on the saddle, a slide rail is fixed on the spindle box, and the slide rail is provided with:

[0008] A lubricating member, used for lubricating the sliding block;

[0009] Trigger mechanism: trigger mechanisms are arranged on both sides of the lubricating member, and when the sliding block contacts two trigger mechanisms at the same time, the lubricating member operates.

[0010] In the above-mentioned four-guide box-in-box structure, the saddle includes two detachable U-shaped plates, four sliders are fixed on the two U-shaped plates, four slide rails are fixed on the spindle box, and one slide rail is adapted to two sliders.

[0011] In the above-mentioned four-guide rail box-in-box structure, the lubricating member includes an adapting groove constructed in the slide rail, a through hole communicating with the adapting groove is constructed on the slide rail, and the lubricating member is slidably connected in the adapting groove.

[0012] In the above-mentioned four-guide box-in-box structure, an oil storage channel is constructed in the slide rail, a branch pipe connected to the oil storage channel is constructed in the adapter groove, the lubricating part includes a movable tube slidably mounted on the branch pipe, a ball is provided at one end of the movable tube away from the branch pipe, and a first elastic part is provided in the movable tube for forcing the ball to seal the end of the movable tube.

[0013] In the above-mentioned four-guide box-in-box structure, the first elastic member includes an annular plate slidably connected in the movable tube, the annular plate is constructed with an arc plate adapted to the ball, an elastic sheet is fixed on the annular plate, and the other end of the elastic sheet is fixed on the inner wall of the movable tube.

[0014] In the above-mentioned four-guide rail box-in-box structure, the trigger mechanism includes a movable groove constructed on the slide rail, a movable block is slidably connected in the movable groove, one end of the movable block is constructed as a hemisphere and extends out of the movable groove, and a second elastic member is arranged in the movable groove for forcing the movable block to move away from the movable groove.

[0015] The above-mentioned four-guide box-in-box structure has a connecting groove constructed between the movable groove and the adapting 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 member is arranged in the adapting groove for forcing 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 above-mentioned four-guide box-in-box structure, the elastic force of the third elastic member is smaller than the elastic force of the second elastic member. When the slider does not interfere with the movable block, the connecting ring can be forced to squeeze the third elastic member through the wedge-shaped groove and the linkage block to force the movable tube to move away from the through hole; when the slider interferes with two movable blocks at the same time, the linkage block can be forced to insert into the wedge-shaped groove through the third elastic member and the connecting ring to force the movable tube to approach the through hole and lubricate the slider through the ball bearings.

[0017] In the above-mentioned four-guide rail box-in-box structure, the lubricating parts and the trigger mechanisms are alternately arranged in the length direction of the slide rails.

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

[0019] In the above technical scheme, the present invention provides a four-guide box-in-box structure. In the process of the slider passing through the lubricating part, the slider will successively collide with two trigger mechanisms, so that the lubricating part moves between the slider and the slide rail to trigger and lubricate the slider, and try to avoid the lubricating part running when it just contacts the slider but has not moved between the slider and the slide rail, and try to avoid the lubricating oil in the lubricating part rolling onto the outer wall of the slider. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0021] Figure 1 A schematic diagram of the overall structure provided by an embodiment of the present invention;

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

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

[0024] Figure 4 A schematic diagram of the structure of an adapter slot provided in yet another embodiment of the present invention;

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

[0026] Figure 6 A schematic diagram of a linkage block structure provided by another embodiment of the present invention;

[0027] Figure 7 A schematic diagram of the structure inside a movable tube provided in yet another embodiment of the present invention;

[0028] Figure 8 A schematic diagram of a slide rail structure provided by another embodiment of the present invention;

[0029] Fig. 9 A schematic diagram of a sliding rod structure provided by another embodiment of the present invention;

[0030] Fig.10 A schematic diagram of the structure of a first wedge-shaped portion provided in yet another embodiment of the present invention;

[0031] Fig.11 A schematic diagram of the structure of a second wedge-shaped portion provided in another embodiment of the present invention;

[0032] Fig.12A schematic diagram of a baffle structure provided by another embodiment of the present invention;

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

[0034] Description of reference numerals:

[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; 10. Annular plate; 11. Arc plate; 12. Elastic sheet; 13. Movable block; 14. Hemisphere; 15. Second elastic member; 16. Linkage block; 17. Connecting ring; 18. Third elastic member; 19. Wedge surface; 20. Wedge groove; 21. Slide rod; 22. First wedge-shaped portion; 23. Second wedge-shaped portion; 24. Third wedge-shaped portion; 25. Baffle; 26. Connecting rod. DETAILED DESCRIPTION

[0036] 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.

[0037] Reference Figure 1-13 An embodiment of the present invention provides a four-guide box-in-box structure, including a saddle 1 and a spindle box 2, a slider 3 is fixed on the saddle 1, a slide rail 4 is fixed on the spindle box 2, a lubricating part and a trigger mechanism are provided on the slide rail 4, the lubricating part is used to lubricate the slider 3; trigger mechanisms are provided on both sides of the lubricating part, and when the slider 3 simultaneously contacts two trigger mechanisms, the lubricating part operates.

[0038] Specifically, the cradle five-axis machine, also known as a five-axis machining center, is a machining center with high technological content, high precision, and is specially used for machining complex curved surfaces. It has the characteristics of high efficiency and high precision. For the cradle five-axis machine, its spindle box 2 is centrally installed on the saddle 1 through a guide rail (that is, a slider 3 and a slide rail 4 structure), and the saddle 1 is suspended on a crossbeam through a guide rail, and the crossbeam is installed on the guide rail of the side wall of the bed, so that the spindle box 2 can perform multi-axis movement on the bed, thereby processing the workpiece clamped on the bed through the tool on the spindle box 2. The above are all existing technologies and will not be repeated here. The innovation of the embodiment of the present invention is that a lubricating part and a trigger mechanism are arranged on the slide rail 4. The lubricating part can be a ball lubrication structure in the prior art, which can roll the lubricating oil onto the slider 3 through contact and relative rolling; the trigger mechanism can be a sensor structure in the prior art, and trigger mechanisms are arranged on both opposite sides of the lubricating part. In the process of the slider 3 passing through the lubricating part, the slider 3 will first contact one trigger mechanism, then contact the lubricating part, and finally contact another trigger mechanism. In this way, the lubricating part can be triggered and lubricated only when it moves between the slider 3 and the slide rail 4. It is avoided as much as possible that the lubricating part runs when it just contacts the slider 3 but has not moved between the slider 3 and the slide rail 4, and it is avoided as much as possible that the lubricating oil in the lubricating part is rolled onto the outer wall of the slider 3 (the side that does not contact the slide rail 4, which will cause waste and pollution).

[0039] In another embodiment provided by the present invention, further, the saddle 1 includes two detachable U-shaped plates 101, four sliders 3 are fixed on each of the two U-shaped plates 101, four slide rails 4 are fixed on the spindle box 2, and one of the slide rails 4 is adapted to the two sliders 3. Specifically, the two U-shaped plates 101 are detachably connected by bolts, and when the two U-shaped plates 101 are fixed to each other, a saddle 1 box body is formed and surrounds the spindle box 2 (this is a split box-in-box structure); the four slide rails 4 are symmetrically arranged on two opposite sides of the spindle box 2, four sliders 3 are fixed on the inner wall of a U-shaped plate 101, and the four sliders 3 are arranged on two slide rails 4 on one side of the spindle box 2, that is, two sliders 3 are slidably arranged on one slide rail 4, and such an arrangement can improve the spindle The stability of the box 2; in the prior art, two slide rails 4 are generally arranged between the spindle box 2 and the saddle 1, and the two slide rails 4 are concentrated on the side of the spindle box 2 close to the saddle 1. Such an arrangement makes the rigidity of the spindle box 2 weak, and during the cutting movement, the vibration amplitude of the tool on the spindle box 2 is relatively large; in this embodiment, four slide rails 4 are arranged on the spindle box 2, and the four slide rails 4 are respectively arranged on two opposite sides of the spindle box 2, so as to increase the rigidity of the spindle box 2 and minimize the amplitude of the tool on the spindle box 2.

[0040] Furthermore, the lubricating member includes an adapting groove constructed in the slide rail 4, and a through hole 5 connected to the adapting groove is constructed on the slide rail 4, and the lubricating member is slidably connected in the adapting groove. Specifically, when the slider 3 does not collide with the two trigger mechanisms at the same time, the lubricating member needs to be received in the slide rail 4, and the lubricating member is avoided from directly contacting the slider 3 as much as possible. For this purpose, the adapting groove and the through hole 5 are provided, and the lubricating member is slidably provided in the adapting groove, so that when the slider 3 collide with the two trigger mechanisms at the same time, the lubricating member is controlled to move out of the adapting groove and fit at the through hole 5 (a driving structure, such as a piezoelectric driver, can be provided in the adapting groove to control the movement of the lubricating member based on the operation of the two trigger mechanisms), so as to lubricate the slider 3 moving relative to the slide rail 4.

[0041] Furthermore, an oil storage channel 6 is constructed in the slide rail 4, a branch pipe 7 connected to the oil storage channel 6 is constructed in the adapter groove, the lubricating component includes a movable tube 8 slidably mounted on the branch pipe 7, a ball 9 is provided at one end of the movable tube 8 away from the branch pipe 7, and a first elastic component for forcing the ball 9 to seal the end of the movable tube 8 is provided in the movable tube 8. Specifically, the oil storage channel 6 is arranged along the length direction of the slide rail 4, and the oil storage channel 6 is filled with lubricating oil; the branch pipe 7 is fixed in the adapting groove along the thickness direction of the slide rail 4, and the inner diameter of the movable tube 8 is adapted to the outer diameter of the branch pipe 7, so that the movable tube 8 can be slidably mounted on the branch pipe 7 and slide along the thickness direction of the slide rail 4, and an opening is constructed on the end of the movable tube 8 away from the branch pipe 7, and the ball 9 is located in the movable tube 8 and can seal the opening under the action of the first elastic member; with such a configuration, when the movable tube 8 is retracted into the adapting groove, the ball 9 seals the opening, and the lubricating oil in the oil storage channel 6 cannot flow out through the opening; when the movable tube 8 is away from the branch pipe 7 and fits against the inner wall of the through hole 5, the ball 9 exposes the slide rail 4 from the opening and the through hole 5, and at this time, the slider 3 resists the ball 9 and can force the ball 9 to open the opening, so that the lubricating oil can flow to the slider 3 through the ball 9, thereby lubricating the slider 3.

[0042] In the above embodiment, the first elastic member can be a spring structure. Preferably, the first elastic member includes an annular plate 10 slidably connected in the movable tube 8, and an arc plate 11 adapted to the ball 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 on the inner wall of the movable tube 8. Specifically, the diameter of the annular plate 10 is larger than the diameter of the ball 9, and the diameter of the ball 9 is larger than the opening diameter. The two ends of the elastic sheet 12 are respectively fixed on the inner wall of the movable tube 8 and the annular plate 10, so that the annular plate 10 is forced to approach the opening through the elastic sheet 12, thereby forcing the ball 9 to block the opening through the arc plate 11; when the slider 3 contacts the ball 9, the arc plate 11 and the annular plate 10 are contacted and squeeze the elastic sheet 12, thereby forcing the ball 9 to open the opening, and the ball 9 can keep rotating between the arc plate 11 and the slider 3, so that the lubricating oil can be rolled onto the slider 3 through the rotation of the ball 9, thereby reducing the friction and improving the lubrication efficiency.

[0043] In another embodiment provided by the present invention, as an alternative to the sensor structure selected for the trigger mechanism, the trigger 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, and a second elastic member 15 for forcing the movable block 13 away from the movable groove is provided in the movable groove. A connecting groove is constructed between the movable groove and the adapting groove, a linkage block 16 is slidably connected in the connecting groove, and 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, and a third elastic member 18 for forcing the connecting ring 17 to approach the through hole 5 is provided in the adapting groove, 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, the movable block 13 and the movable groove are both constructed as non-rotating bodies, that is, the movable block 13 can only slide relatively in the movable groove but cannot rotate relatively; the second elastic member 15 can select a spring structure in the prior art, one end of which is fixed to the inner wall of the movable groove, and the other end is fixed to the movable block 13; a hole adapted to the hemisphere 14 is constructed at one end of the movable groove, so that the hemisphere 14 at one end of the movable block 13 can be exposed through the hole to the slide rail 4 under the action of the second elastic member 15, and when the slider 3 passes through the hemisphere 14, it will resist the hemisphere 14 to force the hemisphere 14 and the movable groove to be retracted into the movable groove (the second elastic member 15 is in the process of the second elastic member 15). 15 is squeezed), when the slider 3 is separated from the hemispherical body 14, the movable block 13 will be reset under the action of the second elastic member 15 and drive the hemispherical body 14 to expose the slide rail 4; the two ends of the connecting groove are respectively connected to the movable groove and the adapting groove, and the wedge-shaped ends at both ends of the linkage block 16 are symmetrically arranged, one end of which is located in the adapting groove and adapted to the wedge-shaped surface 19 on the connecting ring 17, and the other end is located in the movable groove and adapted to the wedge-shaped groove 20 on the movable block 13; the third elastic member 18 can select a spring structure in the prior art, which can be sleeved on the branch pipe 7, one end of the third elastic member 18 is fixed on the inner wall of the adapting groove, and the other end is fixed on the connecting ring 17.

[0044] The two opposite sides of the adapting groove are both constructed with movable grooves, and movable blocks 13 and linkage blocks 16 are arranged in the two movable grooves, that is, linkage blocks 16 are arranged on the two opposite sides of a connecting ring 17; the elastic force of the third elastic member 18 is smaller than the elastic force of the second elastic member 15, and when the sliding block 3 does not interfere with the movable block 13, the connecting ring 17 can be forced to squeeze the third elastic member 18 through the wedge-shaped groove 20 and the linkage block 16 to force the movable tube 8 away from the through hole 5 (the elastic force of the second elastic member 15 is greater than the elastic force of the third elastic member 18, so that the wedge-shaped groove 20 can interfere with the end of the linkage block 16 to force the linkage block 16 to move toward the adapting groove, thereby forcing the connecting ring 17 to squeeze the third elastic member 18 and drive the movable tube 8 away from the through hole 5, as shown in FIG. Figure 4 and Figure 5As shown); when the slider 3 simultaneously contacts the two movable blocks 13, the third elastic member 18 and the connecting ring 17 can force the linkage block 16 to be inserted into the wedge-shaped 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 to be received in the movable groove, the other movable block 13 can force the movable tube 8 to be away from the through hole 5 through the wedge-shaped groove 20 and the linkage block 16. When the slider 3 simultaneously forces the two movable blocks 13 to be received in the corresponding movable blocks 13, the two linkage blocks 16 correspond to the two wedge-shaped grooves 20 respectively, so that the third elastic member 18 can force the connecting ring 17 to contact the two linkage blocks 16, so that the two linkage blocks 16 are inserted into the corresponding wedge-shaped 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 shown).

[0045] The advantage of such a configuration is that, in the process of the slider 3 passing through the lubricating part, the slider 3 will first collide with the two movable blocks 13 (hemispherical body 14) in turn. When the slider 3 only collide with 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 the slider 3 simultaneously collide with the two movable blocks 13, the movable tube 8 can approach the through hole 5 under the action of the third elastic part 18 and lubricate the slider 3 through the ball 9, so that the lubricating part can operate passively when it is between the slider 3 and the slide rail 4, and try to avoid the lubricating part directly releasing the lubricating oil when it just contacts the slider 3 and is still outside the slider 3, which will apply the lubricating oil to the outside of the slider 3 and cause waste and pollution.

[0046] In another embodiment provided by the present invention, further, in the length direction of the slide rail 4, the lubricating parts and the trigger mechanisms are alternately arranged. Specifically, in the above embodiment, a trigger mechanism is arranged on both sides of a lubricating part, that is, a lubricating part corresponds to two trigger mechanisms; in this embodiment, Figure 8 As shown, the lubricating parts and the trigger mechanism are alternately arranged along the length direction of the slide rail 4, and the trigger mechanism is close to the end of the slide rail 4 (ensuring that the trigger mechanism is arranged on both sides of the lubricating parts); the two opposite sides of the movable block 13 are constructed with wedge grooves 20. In this embodiment, wedge grooves 20 and linkage blocks 16 can be arranged on both sides of the movable block 13. When the slider 3 forces a movable block 13 to be retracted into the movable groove, the linkage blocks 16 on both sides of the movable block 13 can enter the wedge grooves 20 on both sides of the movable block 13 (that is, one movable block 13 can be used to trigger the lubricating parts on both sides at the same time); in this way, when the slider 3 moves from one end of the slide rail 4 to the other end, multiple movable blocks 13 can be triggered in sequence to enable multiple lubricating parts to lubricate the slider 3 in sequence, so that the slide rail 4 and the slider 3 can be lubricated more comprehensively; at the same time, one trigger mechanism can be used to trigger two adjacent lubricating parts at the same time, reducing the cost of the device while making the structure more compact and further improving the lubrication efficiency.

[0047] In the above embodiment, the lubricating member and the trigger mechanism can operate with the relative movement of the slider 3 and the slide rail 4, which can always maintain a good lubrication effect between the slider 3 and the slide rail 4. However, the slider 3 needs to contact a number of movable blocks 13 during operation. Obviously, this will affect the operation of the slider 3; further, the slide rail 4 is constructed with a through groove along its length direction, and a slide rod 21 is slidably connected in the through groove. The slide rod 21 is simultaneously inserted into the adapter groove and the movable groove. The slide rod 21 and the movable tube 8, the slide rod 21 and the movable block 13 are all staggered, that is, the movable tube 8 and the movable block 13 are not in contact with each other during operation. The slide bar 21 interferes; the slide bar 21 is configured with a first wedge-shaped portion 22 and a second wedge-shaped portion 23, and the outer wall of the movable block 13 is configured with a third wedge-shaped portion 24 (a movable groove is provided for the third wedge-shaped portion 24 to slide inside thereof), the first wedge-shaped portion 22 is adapted to the wedge-shaped surface 19 on the connecting ring 17, and the slide bar 21 can force the connecting ring 17 and the movable tube 8 to be received into the adapting groove by the first wedge-shaped portion 22 abutting against the wedge-shaped surface 19 when moving, and the second wedge-shaped portion 23 is adapted to the third wedge-shaped portion 24, and the slide bar 21 can force the movable block 13 to be received into the movable groove by the second wedge-shaped portion 23 abutting against the third wedge-shaped portion 24 when moving; The slide bar 21 has a first position and a second position when sliding along the through groove (a screw structure can be provided at the end of the slide rail 4 to drive the slide bar 21 to slide in the through groove, thereby switching the position of the slide bar 21. Driving the slide bar 21 to slide linearly by the screw structure is a prior art, which is not shown in the figure and will not be described here). In the first position, the first wedge-shaped portion 22 is separated from the wedge-shaped surface 19, and the first wedge-shaped portion 22 does not affect the movement of the connecting ring 17 and the movable tube 8. The second wedge-shaped portion 23 is separated from the third wedge-shaped portion 24, and the second wedge-shaped portion 23 does not affect the movement of the third wedge-shaped portion 24 and the movable block 13. When the slide bar 3 does not need to be lubricated, When sliding, the control slide bar 21 slides along the through groove to the second position. During the process, the first wedge-shaped portion 22 contacts the wedge-shaped surface 19 to force the movable tube 8 to be retracted into the adapting groove, and the second wedge-shaped portion 23 contacts the third wedge-shaped portion 24 to force the movable block 13 to be retracted into the movable groove. With this arrangement, when the slider 3 does not need to be lubricated, the slide bar 21 is switched to the second position to drive the movable block 13 and the movable tube 8 to be retracted into the slide rail 4, thereby reducing the friction between the slider 3 and the slide rail 4. In addition, during the process of switching the slide bar 21 to the second position, whether the lubricating member and the trigger mechanism are in operation (such as Fig. 9 and Fig.10 In the embodiment, the lubricating member is received in the adapting groove, and the movement of the slide rod 21 can force the movable block 13 and the movable tube 8 to be received in the slide rail 4. Fig.11As shown, the lubricating part operates, and the movement of the slide bar 21 can also force the movable block 13 and the movable tube 8 to be retracted into the slide rail 4). The slide bar 21 can force the movable block 13 and the movable tube 8 to be retracted into the slide rail 4 until the slider 3 needs to be lubricated. Then, the slide bar 21 is switched to the first position again to enable the lubricating part to operate based on the trigger mechanism. The advantage is that the state of the lubricating part and the trigger mechanism can be switched by controlling the position of the slide bar 21, so as to reduce the influence of the movable block 13 on the slider 3 when lubrication is not required.

[0048] Furthermore, in the above embodiment, when the lubricating member is not between the slider 3 and the slide rail 4, the movable tube 8 is in a position where it is retracted into the adapting groove. At this time, the through hole 5 is open and exposed to the outside, which will allow dust and other impurities to enter the adapting groove. Obviously, the dust and impurities will affect the operation of the lubricating member; for this reason, a baffle 25 is slidably arranged in the adapting groove, and two baffles 25 are symmetrically arranged in the adapting groove. The two baffles 25 are both slidably connected at the through hole 5. When the two baffles 25 are close to each other, the through hole 5 can be blocked. When the two baffles 25 are away from each other, the through hole 5 can be opened to expose the ball 9. Connecting rods 26 are hinged on the outer walls on opposite sides of the movable tube 8, and the other ends of the two connecting rods 26 are respectively hinged to the two baffles 25; with such a configuration, when the movable tube 8 is close to the through hole 5, the two baffles 25 can be forced to move away from each other to open the through hole 5 through the connecting rod 26, and when the movable tube 8 is retracted into the adapting groove, the two baffles 25 can be driven to move closer to each other to block the through hole 5 through the connecting rod 26. The advantage is that the two baffles 25 can be passively driven to open or close through the connecting rod 26, so as to block the through hole 5 when the lubricating component is not in operation, and to prevent impurities from entering the through hole 5 and affecting the operation of the lubricating component.

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

[0050] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that 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 above 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-guide box-in-box 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 member, used for lubricating the sliding block; Trigger mechanism: trigger mechanisms are arranged on both sides of the lubricating member, and when the sliding block contacts two trigger mechanisms at the same time, the lubricating member operates.

2. A four-guide rail box-in-box structure according to claim 1, characterized in that: The saddle comprises two detachable U-shaped plates, four sliders are fixed on the two U-shaped plates, four slide rails are fixed on the spindle box, and one slide rail is adapted to two sliders.

3. The four-guide rail box-in-box structure according to claim 1, characterized in that: The lubricating member comprises an adapting groove constructed in the slide rail, a through hole communicating with the adapting groove is constructed on the slide rail, and the lubricating member is slidably connected in the adapting groove.

4. A four-guide rail box-in-box structure according to claim 3, characterized in that: An oil storage channel is constructed in the slide rail, a branch pipe connected to the oil storage channel is constructed in the adapter groove, the lubricating component includes a movable tube slidably sleeved on the branch pipe, a ball is arranged at one end of the movable tube away from the branch pipe, and a first elastic component for forcing the ball to seal the end of the movable tube is arranged in the movable tube.

5. A four-guide rail box-in-box structure according to claim 4, characterized in that: The first elastic member comprises an annular plate slidably connected in the movable tube, the annular plate is constructed with an arc plate adapted to the ball, an elastic sheet is fixed on the annular plate, and the other end of the elastic sheet is fixed on the inner wall of the movable tube.

6. A four-guide rail box-in-box structure according to claim 5, characterized in that: The trigger mechanism comprises a movable groove constructed on the slide rail, a movable block is slidably connected in the movable groove, one end of the movable block is constructed as a hemisphere and extends out of the movable groove, and a second elastic member for forcing the movable block to stay away from the movable groove is arranged in the movable groove.

7. A four-guide rail box-in-box structure according to claim 6, characterized in that: A connecting groove is constructed between the movable groove and the adapting 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 member is arranged in the adapting groove for forcing 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.

8. The four-guide rail box-in-box structure according to claim 7, characterized in that: The elastic force of the third elastic member is smaller than the elastic force of the second elastic member. When the slider does not interfere with the movable block, the connecting ring can be forced to squeeze the third elastic member through the wedge-shaped groove and the linkage block to force the movable tube to move away from the through hole. When the slider interferes with two movable blocks at the same time, the linkage block can be forced to insert into the wedge-shaped groove through the third elastic member and the connecting ring to force the movable tube to approach the through hole and lubricate the slider through the ball bearing.

9. The four-guide rail box-in-box structure according to claim 7, characterized in that: In the length direction of the slide rail, the lubricating parts and the triggering mechanisms are arranged alternately.

10. A four-guide rail box-in-box structure according to claim 9, characterized in that: The movable block is provided with wedge-shaped grooves on two opposite sides thereof.

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