Four-guide-rail crown block structure

Abstract

The invention discloses a four-guide-rail crown block structure, and relates to the technical field of numerical control machine tool machining, the four-guide-rail crown block 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 folding and unfolding mechanism is arranged on the sliding block, and the folding and unfolding mechanism comprises a back face part and two side face parts which are connected to the sliding block in a sliding mode. A lubricating assembly is arranged on the back surface part; and the driving assembly has a first stroke for driving the back surface part to be close to the sliding rail and a second stroke for driving the two side surface parts to be close to each other. According to the four-guide-rail crown block structure, the back face part and the two side face parts are driven to be far away from each other through the first stroke and the second stroke of the driving assembly, so that the sliding rail mounting space and the lubricating assembly overhauling space are increased, and one end of a sliding rail can be placed between the back face part and the two side face parts at will; and then the driving assembly drives the back face part and the two side face parts to get close to each other, so that the sliding rail is aligned with the sliding block.

Description

Technical Field

[0001] The invention relates to the technical field of numerical control machine tool processing, and in particular to a four-guide rail overhead crane structure. 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 CN119427014A and application publication date February 14, 25, and titled "Vertical five-axis machining center with inverted T-shaped cross slide", includes a base, X-axis linear guide, saddle, Y-axis linear guide, turntable support, five-axis cradle turntable, column, Z-axis linear guide, spindle box, and vertical tool magazine. Compared with the traditional vertical five-axis machining center, this patent adopts a cross slide structure, which can effectively reduce the overhang of the saddle and worktable.

[0004] CNC machine tools are generally equipped with multiple sets of sliders and slide rails. The sliders and slide rails are tightly fitted, and a lubrication structure is also provided on the side of the slider close to the slide rail. Obviously, the integral slider structure is not only inconvenient for the installation of the slider and the slide rail, but also inconvenient for the maintenance of the lubrication structure. Summary of the invention

[0005] The object of the present invention is to provide a four-guide rail overhead travelling crane 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 rail overhead crane 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 slider is provided with:

[0008] The retracting and extending mechanism comprises a back portion and two side portions slidably connected to the slider, wherein the back portion is provided with a lubrication assembly; and a driving assembly having a first stroke for driving the back portion to approach the slide rail and a second stroke for driving the two side portions to approach each other.

[0009] In the above-mentioned four-guide rail overhead crane structure, four sliders are fixed on the saddle, and four slide rails are fixed on the spindle box.

[0010] In the above-mentioned four-guide rail overhead crane structure, the slider is constructed with a first slide groove and two second slide grooves, the back portion is slidably connected in the first slide groove, and the two side portions are slidably connected in the two second slide grooves respectively.

[0011] In the above-mentioned four-guide rail overhead crane structure, the driving assembly includes a driving frame slidably connected to a slider, the driving frame is provided with an inclined plate, the inclined plate is provided with a first inclined groove, the back portion is provided with a first connecting column, and the first connecting column is slidably connected in the first inclined groove.

[0012] In the above-mentioned four-guide rail overhead crane structure, the driving assembly also includes a connecting block constructed on the back portion, the connecting block is constructed with a second inclined groove, and the side portion is constructed with a second connecting column, and the second connecting column is slidably connected in the second inclined groove.

[0013] In the above-mentioned four-guide rail overhead crane structure, the drive frame has a first position and a second position. In the first position, the back portion and the two side portions are separated from each other, and in the second position, the back portion and the two side portions are attached to each other.

[0014] In the above-mentioned four-guide rail overhead crane structure, the lubrication assembly includes a movable groove constructed on the back portion, a through hole connected to the movable groove is constructed on the back portion, an oil storage channel is constructed in the slide rail, a branch pipe connected to the oil storage channel is constructed in the movable groove, a movable tube is provided on the sliding sleeve of the branch pipe, and a ball is provided on the end of the movable tube away from the branch pipe.

[0015] In the above-mentioned four-guide rail overhead crane structure, an end of the movable tube away from the branch tube is configured with an opening, and a first elastic member for forcing the ball to seal the opening is arranged in the movable tube.

[0016] In the above-mentioned four-guide rail overhead crane structure, a trigger rod is inserted on the back portion, the trigger rod extends into the movable groove and is fixed to the movable tube, and a second elastic member for forcing the movable tube to be retracted into the movable groove is arranged in the movable groove.

[0017] In the above-mentioned four-guide rail overhead crane structure, one end of the trigger rod is constructed with a wedge-shaped surface and the wedge-shaped surface is exposed on the back side, and the drive frame is constructed with a vertical groove connected to the first inclined groove. The drive frame also has a third position. In the third position, the first connecting column is located in the vertical groove to contact the wedge-shaped surface through the inclined plate and force the movable tube to fit the through hole.

[0018] In the above technical scheme, the present invention provides a four-guide rail overhead crane structure, which drives the back part and the two side parts to move away from each other through the first stroke and the second stroke of the driving component, thereby increasing the space for installing the slide rail and the space for inspecting the lubrication component, so that one end of the slide rail can be placed arbitrarily between the back part and the two side parts, and then the back part and the two side parts are driven to move closer to each other by the driving component to force the slide rail to be aligned with the slider, so that the back part and the two side parts constitute the extension part of the slider. 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 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.

[0020] Figure 1 A schematic diagram of the overall structure provided by an embodiment of the present invention;

[0021] Figure 2 A schematic diagram of the spindle box structure provided in yet another embodiment of the present invention;

[0022] Figure 3 A schematic diagram of the structure of a folding and unfolding mechanism provided in yet another embodiment of the present invention;

[0023] Figure 4 A schematic diagram of the structure of a drive frame provided in yet another embodiment of the present invention;

[0024] Figure 5 A schematic diagram of the structure of a first chute provided in yet another embodiment of the present invention;

[0025] Figure 6 A schematic diagram of a connecting groove structure provided in yet another embodiment of the present invention;

[0026] Figure 7 A schematic diagram of the structure of a second chute provided in yet another embodiment of the present invention;

[0027] Figure 8 A schematic diagram of the structure inside the movable slot provided by another embodiment of the present invention;

[0028] Fig. 9 A schematic diagram of a trigger rod structure provided by another embodiment of the present invention;

[0029] Fig.10 A schematic diagram of a connecting rod structure provided by another embodiment of the present invention;

[0030] Fig.11 A schematic diagram of a vertical slot structure provided by another embodiment of the present invention;

[0031] Fig.12 A schematic diagram of the structure of a drive frame provided by another embodiment of the present invention;

[0032] Fig.13 A schematic diagram of a baffle structure provided in yet another embodiment of the present invention;

[0033] Fig.14 A schematic diagram of a hinged rod structure provided in yet another embodiment of the present invention.

[0034] Description of reference numerals:

[0035] 1. Saddle; 2. Spindle box; 3. Slider; 4. Slide rail; 5. Back part; 6. Side part; 7. First slide groove; 8. Second slide groove; 9. Drive frame; 10. Inclined plate; 11. First inclined groove; 12. First connecting column; 13. Extension part; 14. Connecting block; 15. Second inclined groove; 16. Second connecting column; 17. Through hole; 18. Oil storage channel; 19. Branch pipe; 20. Movable pipe; 21. Ball; 22. Annular plate; 23. Arc plate; 24. Elastic sheet; 25. Trigger rod; 26. Second elastic member; 27. Wedge surface; 28. Vertical groove; 29. ​​Baffle; 30. Articulated rod; 31. 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 1-14 An embodiment of the present invention provides a four-guide rail overhead crane 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 retracting and extending mechanism is provided on the slider 3, the retracting and extending mechanism includes a back portion 5 and two side portions 6 slidably connected to the slider 3, a lubrication assembly is provided on the back portion 5; and a driving assembly is also included, which has a first stroke for driving the back portion 5 to approach the slide rail 4 and a second stroke for driving the two side portions 6 to approach each other.

[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 back portion 5 and two side portions 6 are arranged on the slider 3, and a driving component is arranged to drive the back portion 5 and the two side portions 6. The driving component can be a combination of multiple linear driving structures, such as a cylinder or a hydraulic cylinder structure, to drive the back portion 5 close to the slide rail 4 or drive the two side portions 6 close to each other; the lubrication component can use a ball lubrication structure in the prior art, which is located on the side of the back portion 5 close to the slide rail 4 to lubricate the slide rail 4 when the back portion 5 is in contact with the slide rail 4; the advantage of such a setting is that when the slider 3 and the slide rail 4 are adapted and installed, the back portion 5 and the two side portions 6 are driven away from each other through the first stroke and the second stroke of the driving component, so as to achieve the desired effect. By increasing the installation space of the slide rail 4, one end of the slide rail 4 can be placed arbitrarily between the back portion 5 and the two side portions 6, and then the back portion 5 and the two side portions 6 are driven by the driving component to approach each other (that is, approach the slide rail 4), so that the slide rail 4 is forced to align with the slider 3, so that the back portion 5 and the two side portions 6 constitute an extension of the slider 3, and then the slider 3 can slide along the length direction of the slide rail 4. During the process, the slider 3 and the slide rail 4 can be lubricated by the lubricating part to reduce the friction between the slider 3 and the slide rail 4; when the back portion 5 and the two side portions 6 are driven away from each other by the driving component, the space between the back portion 5 and the side portions 6 becomes larger, which is convenient for inspecting and repairing the lubrication part.

[0039] In another embodiment provided by the present invention, further, four sliders 3 are fixed on the saddle 1, and four slide rails 4 are fixed on the spindle box 2. Specifically, the saddle 1 is hollow inside to surround the spindle box 2, and the four sliders 3 are respectively fixed on the four inner walls of the saddle 1, and correspondingly, the four slide rails 4 are respectively fixed on the four outer walls of the spindle box 2, so that the stability of the spindle box 2 can be improved by the four sliders 3 and the four slide rails 4; 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, so that the rigidity of the spindle box 2 is relatively weak, and the vibration amplitude of the tool on the spindle box 2 is relatively large during the cutting movement; in this embodiment, four slide rails 4 are arranged on the spindle box 2, and the four slide rails 4 are respectively arranged on the four 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 slider 3 is configured with a first slide groove 7 and two second slide grooves 8, the back portion 5 is slidably connected in the first slide groove 7, and the two side portions 6 are slidably connected in the two second slide grooves 8. Specifically, the first slide groove 7 and the second slide groove 8 are both configured on one end of the slider 3, the first slide groove 7 is arranged along the thickness direction of the slider 3, and the two second slide grooves 8 are symmetrically arranged and arranged along the width direction of the slider 3; such an arrangement enables the back portion 5 to approach or move away from the slide rail 4 along the first slide groove 7, and enables the two side portions 6 to approach or move away from each other along the second slide grooves 8.

[0041] As an alternative to the above-mentioned scheme of driving the back portion 5 to slide along the slider 3 through the linear drive structure, preferably, the drive assembly includes a drive frame 9 slidably connected to the slider 3, the drive frame 9 is configured with an inclined plate 10, the inclined plate 10 is configured with a first inclined groove 11, the back portion 5 is configured with a first connecting column 12, and the first connecting column 12 is slidably connected in the first inclined groove 11. Specifically, the drive frame 9 fits on the outer wall of the slider 3 and extends toward the two side walls of the slider 3, the drive frame 9 is configured with an extension portion 13, the inclined plate 10 is located at the end of the extension portion 13 away from the drive frame 9, and the end of the inclined plate 10 close to the extension portion 13 is closer to the back portion 5; the first inclined groove 11 is arranged along the inclined plate 10, that is, the end of the first inclined groove 11 close to the drive frame 9 is closer to the back portion 5, and the first connecting column 12 is adapted to the first inclined groove 11; the drive frame 9 is arranged along the length direction of the slider 3, and a linear drive mechanism can be arranged on the slider 3 to drive the drive frame 9 slides along the length direction of the slider 3, and the linear drive mechanism can select a screw rod or a cylinder structure in the prior art. This is the prior art. The linear drive mechanism is not shown in the figure and will not be described here. The advantage of such a configuration is that when the drive frame 9 approaches the back portion 5 along the slider 3 (in the length direction), the inner wall of the first inclined groove 11 can force the connecting column and the back portion 5 to approach the slide rail 4. When the drive frame 9 moves away from the back portion 5 along the slider 3, the inner wall of the first inclined groove 11 can force the connecting column and the back portion 5 to move away from the slide rail 4. This is the first stroke of the drive component.

[0042] As an alternative to the above-mentioned linear drive structure driving the two side parts 6 to approach each other, preferably, the driving assembly further includes a connecting block 14 constructed on the back part 5, a second inclined groove 15 is constructed on the connecting block 14, and a second connecting column 16 is constructed on the side part 6, and the second connecting column 16 is slidably connected in the second inclined groove 15. Specifically, the connecting block 14 is located on the side of the back part 5 close to the side part 6, and the end of the second inclined groove 15 close to the back part 5 is closer to the slide rail 4; the side part 6 is far from the slide rail 4. The side part 6 is constructed with a connecting groove, and the second connecting column 16 is constructed in the connecting groove. The connecting block 14 is slidably connected in the connecting groove. When the connecting block 14 extends into the connecting groove, the second connecting column 16 and the side part 6 can be forced to approach the slide rail 4 through the inner wall of the second inclined groove 15, which is the second stroke of the driving assembly; such a configuration enables the driving frame 9 to have a first position and a second position. In the first position, the back part 5 and the two side parts 6 are separated from each other, and in the second position, the back part 5 and the two side parts 6 are attached to each other. The driving frame 9 has a first position on the slider 3, at which the back portion 5 and the two side portions 6 are separated from each other to increase the space between the three, which is convenient for installing the slide rail 4 or inspecting the lubrication component; when the driving frame 9 approaches the back portion 5, it switches to the second position. During the process, the first connecting column 12 and the back portion 5 can be forced to approach the slide rail 4 through the first inclined groove 11. At the same time, the second connecting column 16 and the side portion 6 can be forced to approach the slide rail 4 through the second inclined groove 15. In this way, the back portion 5 and the two side portions 6 can be driven to synchronously fit the slide rail 4 during the process of the driving frame 9 switching to the second position. Conversely, the back portion 5 and the two side portions 6 can be driven to synchronously move away from the slide rail 4 during the process of the driving frame 9 switching to the first position.

[0043] In another embodiment provided by the present invention, further, the lubrication assembly includes a movable groove configured on the back portion 5, a through hole 17 communicating with the movable groove is configured on the back portion 5, an oil storage channel 18 is configured in the slide rail 4, a branch pipe 19 communicating with the oil storage channel 18 is configured in the movable groove, a movable tube 20 is slidably sleeved on the branch pipe 19, and a ball 21 is provided at one end of the movable tube 20 away from the branch pipe 19. An opening is configured at one end of the movable tube 20 away from the branch pipe 19, and a first elastic member for forcing the ball 21 to block the opening is provided in the movable tube 20. Specifically, the movable groove is constructed inside the slider 3, and the through hole 17 is located on the side of the movable groove close to the slide rail 4, so that the movable tube 20 can fit in the through hole 17 and the ball 21 at its end is exposed from the slider 3; the oil storage channel 18 is arranged along the length direction of the slider 3, and the oil storage channel 18 is filled with lubricating oil; the branch pipe 19 is fixed in the movable groove along the thickness direction of the slide rail 4, and the inner diameter of the movable tube 20 is adapted to the outer diameter of the branch pipe 19, so that the movable tube 20 can be slidably sleeved on the branch pipe 19 and slide along the thickness direction of the slider 3. The movable tube 20 is movable, and an opening is configured on one end away from the branch tube 19. The ball 21 is located in the movable tube 20 and can block the opening under the action of the first elastic member; the first elastic member can be a spring structure in the prior art. Preferably, the first elastic member includes an annular plate 22 slidably connected in the movable tube 20, and an arc plate 23 adapted to the ball 21 is configured on the annular plate 22. An elastic sheet 24 is fixed on the annular plate 22, and the other end of the elastic sheet 24 is fixed on the inner wall of the movable tube 20. The diameter of the annular plate 22 is larger than the diameter of the ball 21, and the diameter of the ball 21 is larger than the diameter of the opening. The two ends of the elastic sheet 24 are respectively fixed on the inner wall of the movable tube 20 and the annular plate 22, so that the annular plate 22 is forced to approach the opening through the elastic sheet 24, thereby forcing the ball 21 to block the opening through the arc plate 23.

[0044] With such arrangement, when the movable tube 20 is retracted into the movable groove, the annular plate 22 can be forced away from the branch tube 19 through the elastic sheet 24, thereby forcing the ball 21 to block the opening through the arc plate 23, and the lubricating oil in the oil storage channel 18 cannot flow out through the opening; when the movable tube 20 is away from the branch tube 19 and fits against the inner wall of the through hole 17, the ball 21 is exposed from the slider 3 at the opening and the through hole 17, and the slide rail 4 now contacts the ball 21 to force the ball 21 and the annular plate 22 to approach the branch tube 19, thereby opening the opening, so that the lubricating oil can flow through the opening to the slide rail 4, and the ball 21 can keep rotating between the arc plate 23 and the slide rail 4, so that the lubricating oil can be rolled onto the slide rail 4 through the rotation of the ball 21, thereby reducing the friction and improving the lubrication efficiency.

[0045] Furthermore, a trigger rod 25 is inserted into the back portion 5 , and the trigger rod 25 extends into the movable groove and is fixed to the movable tube 20 . A second elastic member 26 for forcing the movable tube 20 to be retracted into the movable groove is provided in the movable groove. Specifically, the trigger rod 25 passes through the back portion 5 and extends into the movable groove. A connecting rod 31 is fixed to the end of the trigger rod 25. The other end of the connecting rod 31 is fixed to the movable tube 20. The second elastic member 26 can select a spring structure in the prior art, which is sleeved on the trigger rod 25. One end of the second elastic member 26 is fixed to the outer wall of the trigger rod 25, and the other end is fixed to the inner wall of the movable groove, so that the trigger rod 25 and the movable tube 20 are forced to move away from the through hole 17 by the second elastic member 26 until the end of the trigger rod 25 hits the inclined plate 10 (that is, the inclined plate 10 can act as a limiting structure); in this way, the movable tube 20 is retracted into the movable groove under the action of the second elastic member 26. When the slide rail 4 needs to be lubricated, the trigger rod 25 is forced into the movable groove by external force to drive the movable tube 20 to fit into the through hole 17, thereby lubricating the slide rail 4 through the ball 21.

[0046] Preferably, a wedge-shaped surface 27 is constructed at one end of the trigger rod 25 and the wedge-shaped surface 27 is exposed from the back portion 5, and a vertical groove 28 connected to the first inclined groove 11 is constructed on the drive frame 9, and the drive frame 9 also has a third position, in which the first connecting column 12 is located in the vertical groove 28 to contact the wedge-shaped surface 27 through the inclined plate 10 and force the movable tube 20 to fit the through hole 17. Specifically, the vertical groove 28 is constructed on the extension portion 13 and the vertical groove 28 is smoothly connected to the first inclined groove 11. When the driving frame 9 approaches the back portion 5 along the sliding block 3, it is in the first position, the second position and the third position in sequence. When the driving frame 9 moves from the first position to the second position, the first connecting column 12 moves relative to the connection between the first inclined groove 11 and the vertical groove 28, so that the back portion 5 and the two side portions 6 are close to each other to fit the slide rail 4. During the process, the wedge-shaped surface 27 at the end of the trigger rod 25 always contacts the outer wall of the inclined plate 10, and the relative positions of the movable tube 20 and the branch tube 19 do not change. When the driving frame 9 moves from the second position to the third position, the first connecting column 12 moves relative to the connection between the first inclined groove 11 and the vertical groove 28. A connecting column 12 moves relatively in the vertical groove 28 to contact the wedge surface 27 through the outer wall of the inclined plate 10, thereby forcing the trigger rod 25 to extend into the movable groove, and then forcing the movable tube 20 to fit in the through hole 17 and expose the ball 21 from the slider 3; the advantage of such a configuration is that through the movement of the drive frame 9, the back portion 5 and the two side portions 6 can be first driven to approach each other to fit the slide rail 4, and then the trigger rod 25 can be driven to fit in the through hole 17 to be lubricated by the ball 21, and when the slider 3 and the slide rail 4 do not need lubrication, the drive frame 9 can be reset to the second position to keep the position of the back portion 5 and the two side portions 6 while retracting the movable tube 20 into the movable groove.

[0047] In another embodiment provided by the present invention, further, two baffles 29 are symmetrically arranged at the through hole 17, and the two baffles 29 are slidably connected to the slider 3. When the two baffles 29 are close to each other, the through hole 17 can be blocked, and when the two baffles 29 are away from each other, the through hole 17 can be opened to expose the ball 21. The outer walls of the movable tube 20 on opposite sides are hinged with hinge rods 30, and the other ends of the two hinge rods 30 are respectively hinged to the two baffles 29; in this way, when the movable tube 20 is close to the through hole 17, the two baffles 29 can be forced to move away from each other to open the through hole 17 (such as Fig.14 As shown in FIG. 1 , when the movable tube 20 is received in the adapting groove, the two baffles 29 can be driven to move closer to each other through the hinge rod 30 to block the through hole 17 (as shown in FIG. 1 ). Fig.13 The advantage is that the hinge rod 30 can passively drive the two baffles 29 to open or close, so as to block the through hole 17 when the slide rail 4 does not need lubrication, and try to avoid impurities entering the through hole 17 and affecting the operation of the lubrication component.

[0048] 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 rail overhead crane 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 slider is provided with: The retracting and extending mechanism comprises a back portion and two side portions slidably connected to the slider, wherein the back portion is provided with a lubrication assembly; and a driving assembly having a first stroke for driving the back portion to approach the slide rail and a second stroke for driving the two side portions to approach each other.

2. A four-guide rail overhead crane structure according to claim 1, characterized in that: Four slide blocks are fixed on the saddle, and four slide rails are fixed on the spindle box.

3. The four-guide rail overhead crane structure according to claim 1, characterized in that: The sliding block is provided with a first sliding groove and two second sliding grooves, the back portion is slidably connected in the first sliding groove, and the two side portions are slidably connected in the two second sliding grooves respectively.

4. The four-guide rail overhead crane structure according to claim 1, characterized in that: The driving assembly includes a driving frame slidably connected to the slider, the driving frame is provided with an inclined plate, the inclined plate is provided with a first inclined groove, the back portion is provided with a first connecting column, and the first connecting column is slidably connected in the first inclined groove.

5. A four-guide rail overhead crane structure according to claim 4, characterized in that: The driving assembly further comprises a connecting block constructed on the back portion, the connecting block is provided with a second oblique groove, and the side portion is provided with a second connecting column, the second connecting column is slidably connected in the second oblique groove.

6. A four-guide rail overhead crane structure according to claim 5, characterized in that: The drive frame has a first position and a second position. In the first position, the back portion and the two side portions are separated from each other. In the second position, the back portion and the two side portions are attached to each other.

7. A four-guide rail overhead crane structure according to claim 6, characterized in that: The lubrication assembly includes a movable groove constructed on the back portion, a through hole connected to the movable groove is constructed on the back portion, an oil storage channel is constructed in the slide rail, a branch pipe connected to the oil storage channel is constructed in the movable groove, a movable tube is slidably sleeved on the branch pipe, and a ball is provided at one end of the movable tube away from the branch pipe.

8. A four-guide rail overhead crane structure according to claim 7, characterized in that: An opening is configured at one end of the movable tube away from the branch tube, and a first elastic member for forcing the ball to seal the opening is arranged in the movable tube.

9. A four-guide rail overhead crane structure according to claim 8, characterized in that: A trigger rod is inserted on the back portion, and the trigger rod extends into the movable groove and is fixed to the movable tube. A second elastic member for forcing the movable tube to be retracted into the movable groove is arranged in the movable groove.

10. A four-guide rail overhead crane structure according to claim 9, characterized in that: A wedge-shaped surface is constructed at one end of the trigger rod and the wedge-shaped surface is exposed on the back side. A vertical groove connected to the first oblique groove is constructed on the drive frame. The drive frame also has a third position. In the third position, the first connecting column is located in the vertical groove to contact the wedge-shaped surface through the inclined plate and force the movable tube to fit the through hole.

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