Transmission structure of gantry numerical control machining center

Abstract

The utility model discloses a transmission structure of a gantry numerical control machining center, and relates to the technical field of numerical control machine tools, in particular to a fixed plate and a sliding seat, one side of the fixed plate is movably connected with a ball screw, and the outer ring of the ball screw is in threaded connection with a ball nut. The sliding seat comprises a driving part connected with the ball nut and a driven part movably connected with the fixing plate, the driving part is fixedly connected with the driven part, the outer rings of the two ends of the ball screw are wrapped with telescopic pipes, one end of each telescopic pipe is connected with the driving part, and the other end of each telescopic pipe is connected with the fixing plate. According to the transmission structure of the gantry numerical control machining center, through the arrangement of the first cooling structure, the second cooling structure and the oil pump, the first cooling structure and the second cooling structure can achieve the cooling and lubricating functions at the same time, and the friction force and friction heat between the ball nut and the ball screw are reduced; friction force and friction heat between the rollers and the fixing plate are reduced, and the service life of the transmission structure is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of numerical control machine tools, in particular to a transmission structure of a gantry numerical control machining center. Background Technique

[0002] With the development of the manufacturing industry, the application of numerical control machine tools is becoming more and more extensive, and among them, gantry machining machine tools are also becoming more and more widely used. In order to enable the machine tool spindle to make a linear reciprocating motion along the slide rail in the current numerical control gantry machining center, a transmission mechanism capable of driving the slide seat to move needs to be set in the machine tool. In the prior art, some solutions for the transmission structure of a gantry numerical control machining center are disclosed. For example, the solution disclosed in the authorized patent document with the application number CN201821067967.1 uses a lead screw for transmission, and the slide seat connected to the ball nut can move on the X-axis by using the lead screw. When this type of transmission structure is used, the debris generated during the machining of the workpiece by the gantry numerical control machining center may splash onto the ball screw, affecting the movement of the ball nut, and the ball nut will generate frictional heat when moving in the direction of the ball screw, aggravating the wear of the ball screw and reducing the service life of the ball screw; based on this, this application proposes a transmission structure of a gantry numerical control machining center. Content of the Utility Model

[0003] The utility model provides a transmission structure of a gantry numerical control machining center, which solves the problems that the debris generated during the machining of the workpiece may splash onto the ball screw, which is not conducive to the movement of the slide seat; and the ball nut will generate frictional heat when moving in the direction of the ball screw, aggravating the wear of the ball screw and reducing the service life of the ball screw as mentioned in the above background technique.

[0004] The utility model provides the following technical solution: A transmission structure of a gantry numerical control machining center, including a fixing plate and a slide seat. One side of the fixing plate is movably connected with a ball screw, and the outer circle of the ball screw is threadedly connected with a ball nut. The slide seat includes a driving part connected to the ball nut and a driven part movably connected to the fixing plate. The driving part and the driven part are fixedly connected. The outer circles at both ends of the ball screw are wrapped with telescopic tubes. One end of the telescopic tube is connected to the driving part, and the other end of the telescopic tube is connected to the fixing plate;

[0005] The active part includes a fixed part fixedly connected to the driven part and a detachable part bolted to the fixed part. Grooves are provided in the middle of both the fixed part and the detachable part, and the two grooves form a through hole adapted to the ball nut. A limiting groove is provided on the outer ring of the ball nut, and a limiting block adapted to the limiting groove is fixed in the inner cavity of the groove. First cooling structures are provided at both ends of the groove; A cooling lubricating oil tank and an oil pump are fixed on the top of the active part. The liquid inlet end of the oil pump is connected to the cooling lubricating oil tank through an oil inlet pipe. The driven part includes a driven sleeve fixedly connected to the fixed part. The driven sleeve contacts the fixed plate through rollers. Second cooling structures are provided at both ends of the driven sleeve. A refrigerator is provided in the cooling lubricating oil tank;

[0006] The first cooling structure includes an oil injection ring I fixedly connected to the active part. Sponge rings I adapted to the ball screw are provided on both sides of the oil injection ring I. The oil injection ring I is connected to the oil outlet end of the oil pump through a first oil pipe; The second cooling structure includes a wiping ring and an oil injection ring II movably connected to the fixed plate. Sponge rings II are provided on both sides of the oil injection ring II. The oil injection ring II is connected to the oil outlet end of the oil pump through a second oil pipe.

[0007] Preferably, the inner wall of the sponge ring I contacts the outer surface of the ball screw. An oil-repellent coating is applied to the inner wall of the sponge ring I. The sponge ring I is of a semi-circular structure.

[0008] Preferably, the inner walls of both the sponge ring II and the wiping ring contact the outer surface of the fixed plate, and an oil-repellent coating is applied to the outer surface of the wiping ring and the inner wall of the sponge ring II.

[0009] Preferably, rollers are movably connected to the inner wall of the driven sleeve. The rollers contact the outer surface of the fixed plate. A rotating motor is fixedly connected to one end of the fixed plate. The end of the output shaft of the rotating motor is fixedly connected to one end of the ball screw.

[0010] Preferably, electric ball valves are provided at one ends of both the first oil pipe and the second oil pipe.

[0011] Preferably, bolt holes adapted to the bolts are provided at both ends of the detachable part and one end of the fixed part.

[0012] Compared with the prior art, the present utility model has the following beneficial effects:

[0013] 1. For the transmission structure of this gantry CNC machining center, through the arrangement of the wiping ring and the telescopic tube, the wiping ring can wipe off the impurities adhered to the fixed plate, reducing the friction between the roller and the fixed plate and facilitating the movement of the sliding seat. Through the arrangement of the telescopic tube, the telescopic tube can protect the ball screw, preventing the chips generated during the workpiece processing from splashing onto the ball screw and facilitating the movement of the sliding seat.

[0014] 2. The transmission structure of the gantry CNC machining center, through the settings of the first cooling structure, the second cooling structure and the oil pump, the operation of the oil pump can pump the cooled lubricating oil into the first oil injection ring and the second oil injection ring. The lubricating oil sprayed by the first oil injection ring is sprayed onto the ball screw to lubricate the ball nut, reduce the friction force and frictional heat between the ball nut and the ball screw. The lubricating oil sprayed by the second oil injection ring is sprayed onto the fixing plate to lubricate the roller, reduce the friction force and frictional heat between the roller and the fixing plate, and extend the service life of the transmission structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a front schematic view of the structure of the present utility model;

[0016] Figure 2 is the structure of the present utility model Figure 1 back schematic view;

[0017] Figure 3 is a schematic cross-sectional view of the driven sleeve of the structure of the present utility model;

[0018] Figure 4 is an internal schematic view of the driven sleeve of the structure of the present utility model;

[0019] Figure 5 is an exploded schematic view of the second cooling structure of the structure of the present utility model;

[0020] Figure 6 is a schematic view of the active part of the structure of the present utility model;

[0021] Figure 7 is the structure of the present utility model Figure 6 exploded schematic view;

[0022] Figure 8 is an inner side schematic view of the disassembly part of the structure of the present utility model.

[0023] In the figure: 1. Fixing plate; 2. Rotating motor; 3. Fixing part; 4. Driven sleeve; 5. Oil pump; 6. Cooling lubricating oil tank; 7. Wiping ring; 8. Second oil pipe; 9. Roller; 10. Sponge ring two; 11. Second oil injection ring; 12. First oil pipe; 13. Bolt hole; 14. Sponge ring one; 15. First oil injection ring; 16. Ball nut; 17. Limiting groove; 18. Disassembly part; 19. Limiting block; 20. Ball screw; 21. Expansion pipe; 22. Refrigerator. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0025] The present utility model provides a transmission structure of a gantry CNC machining center, including a fixed plate 1 and a sliding seat. One side of the fixed plate is movably connected with a ball screw 20. One side of the fixed plate is fixedly connected with a rotating motor 2. The end of the output shaft of the rotating motor 2 is fixedly connected with one end of the ball screw 20 through a speed reducer. Through the setting of the rotating motor 2, the rotation of the rotating motor 2 can drive the ball screw 20 fixedly connected thereto to rotate.

[0026] The outer ring of the ball screw 20 is threadedly connected with a ball nut 16. The sliding seat is connected with the ball nut 16. When the ball screw 20 rotates, the ball nut 16 threadedly connected with the ball screw 20 can move in the direction where the ball screw 20 is located. When the ball nut 16 moves, it can drive the sliding seat to move. When this transmission structure is applied to a gantry CNC machining center, the saddle can be fixed on the sliding seat, and this transmission structure is used to drive the saddle to move.

[0027] The above-mentioned sliding seat includes a driving part connected with the ball nut 16 and a driven part movably connected with the fixed plate 1. The driven part includes a driven sleeve 4 movably sleeved on the fixed plate 1. The inner wall of the driven sleeve 4 is movably connected with a roller 9. The driven sleeve 4 contacts the fixed plate 1 through the roller 9. Through the setting of the roller 9, the friction between the driven sleeve 4 and the fixed plate 1 can be reduced, facilitating the movement of the driven sleeve 4 in the direction where the fixed plate 1 is located. And when this transmission structure is in use, the structure fixed to the sliding seat is fixed on the driven sleeve 4, and the fixed plate 1 supports the structure connected to the sliding seat, reducing the influence on the ball screw 20 and prolonging the service life of the ball screw 20.

[0028] Both ends of the driven sleeve 4 are provided with a second cooling structure. The second cooling structure includes a wiping ring 7 and a second oil spraying ring 11 that are movably connected to the fixed plate 1. Both sides of the second oil spraying ring 11 are provided with second sponge rings 10. The inner walls of both the second sponge ring 10 and the wiping ring 7 are in contact with the outer surface of the fixed plate 1. The outer surface of the wiping ring 7 and the inner wall of the second sponge ring 10 are both coated with an oil-repellent coating. Through the setting of the wiping ring 7, during the movement of the driven sleeve 4, the wiping ring 7 can wipe off the impurities attached to the driven sleeve 4, facilitating the movement of the roller 9. Through the setting of the second oil spraying ring 11, lubricating oil can be sprayed onto the fixed plate 1 to lubricate the roller 9, reducing the friction between the roller 9 and the fixed plate 1. Moreover, the lubricating oil can cool the fixed plate 1, reducing the wear of the fixed plate 1. Through the setting of the second sponge ring 10, the second sponge ring 10 can adsorb the splashed oil liquid, reducing the waste of oil liquid, and the second sponge ring 10 can evenly apply the sprayed lubricating oil.

[0029] The active part includes a fixed part 3 fixedly connected to the driven sleeve 4 and a disassembly part 18 bolted to the fixed part 3. Both ends of the disassembly part 18 and one end of the fixed part 3 are provided with bolt holes 13 adapted to the bolts. Through the setting of the bolt holes 13, it is convenient to fix the disassembly part 18 to the fixed part 3.

[0030] Both the middle of the fixed part and the middle of the disassembly part 18 are provided with grooves. The two grooves form a through hole adapted to the ball nut 16. The outer ring of the ball nut 16 is provided with a limiting groove 17. A limiting block 19 adapted to the limiting groove 17 is fixed in the inner cavity of the groove. Through the setting of the limiting block 19, when the ball nut 16 moves, the active part can be driven by the limiting block 19, and the active part drives the driven part fixedly connected thereto to move. Thus, when the ball screw 20 rotates, the position of the sliding seat can be changed.

[0031] From the above description of the active part, it can be seen that after the disassembly part 18 is separated from the fixed part 3, the user can separate the ball nut 16 from the fixed part 3 by translation, facilitating the separation of the sliding seat from the ball nut 16.

[0032] Both ends of the groove are provided with a first cooling structure. The first cooling structure includes a first oil spraying ring 15 fixedly connected to the active part. The outer side of the first oil spraying ring 15 is provided with a first sponge ring 14 adapted to the ball screw 20. The inner wall of the first sponge ring 14 is in contact with the outer surface of the ball screw 20. The inner wall of the first sponge ring 14 is coated with an oil-repellent coating. The first sponge ring 14 is of a semi-circular structure. Through the setting of the first sponge ring 14, when the disassembly part 18 is fixed to the fixed part 3, the first sponge ring 14 on the disassembly part 18 and the first sponge ring 14 on the fixed part 3 can be in contact, and the first oil spraying ring 15 on the disassembly part 18 and the first oil spraying ring 15 on the fixed part 3 can be in contact. The cooling lubricating oil can be evenly sprayed onto the ball screw 20, and the first sponge ring 14 can evenly apply the lubricating oil.

[0033] At the top of the driving part, a cooling lubricating oil tank 6 and an oil pump 5 are fixed. A refrigerator 22 is arranged in the cooling lubricating oil tank 6. When the refrigerator 22 is a semiconductor refrigerator, the hot end of the refrigerator 22 is exposed to the air. Through the arrangement of the refrigerator 22, the refrigerator 22 can cool the lubricating oil. When the cooled lubricating oil is sprayed onto the ball screw 20, it can lubricate the ball nut 16, reduce the friction force between the ball nut 16 and the ball screw 20, and can also cool the frictional heat generated when the ball nut 16 and the ball screw 20 rub, thus prolonging the service life of the ball screw 20.

[0034] The liquid inlet end of the oil pump 5 is connected to the cooling lubricating oil tank 6 through an oil inlet pipe. The first oil spraying ring 15 is connected to the oil outlet end of the oil pump 5 through a first oil pipe 12. The second oil spraying ring 11 is connected to the oil outlet end of the oil pump 5 through a second oil pipe 8. And one ends of both the first oil pipe 12 and the second oil pipe 8 are provided with electric ball valves. Through the arrangement of the oil pump 5, the work of the oil pump 5 can pump the cooled lubricating oil into the inner cavity of the first oil spraying ring 15 or the second oil spraying ring 11. The lubricating oil in the first oil spraying ring 15 can be sprayed onto the outer surface of the ball screw 20 through the spray holes arranged on its side wall. The lubricating oil in the second oil spraying ring 11 can be sprayed onto the fixing plate 1 through the spray holes arranged on its side wall.

[0035] The outer rings at both ends of the above-mentioned ball screw 20 are both wrapped with telescopic tubes 21. One end of the telescopic tube 21 is magnetically connected to the driving part, and the other end of the telescopic tube 21 is magnetically connected to the fixing plate 1.

[0036] The material of the telescopic tube 21 can be a corrugated tube. Through the arrangement of the telescopic tube 21, the telescopic tube 21 can protect the ball screw 20, avoiding debris from splashing onto the ball screw 20 during the workpiece processing of the gantry CNC machining center.

[0037] In some embodiments of the present application, a magnet ring is fixed at the end of the corrugated tube, and metal iron is fixed on the outer surfaces of both the fixing plate 1 and the driving part. The oil-repellent coating is nano-silica. Through the arrangement of the oil-repellent coating, it can prevent the sponge from adsorbing the lubricating oil on the fixing plate 1 or the ball screw 20.

[0038] The electrical components involved in the present application are all prior arts. Those skilled in the art understand their connection methods. Through those skilled in the art, all the electrical components in the present application are connected to their adapted power supplies through wires, and a suitable controller is selected according to the actual situation to meet the control requirements. For the specific connection and control sequence, refer to the following description. The electrical components are electrically connected in the order of their successive operations. Their detailed connection means are well-known techniques in the art. The following mainly introduces the working principle and process, and no further description of electrical control will be made.

[0039] In summary: When the transmission structure of the gantry CNC machining center is in use, the fixing plate 1 is used to fix the transmission structure on the gantry CNC machining center. The saddle of the gantry CNC machining center is fixed on the driven sleeve 4. When the rotating motor 2 works, the rotating motor 2 can drive the ball screw 20 fixedly connected thereto to rotate. The rotation of the ball screw 20 causes the ball nut 16 threadedly connected thereto to move in the direction where the ball screw 20 is located. During the movement of the ball nut 16, the slide is driven through the limit block 19, the saddle is driven by the slide, and the saddle can drive the spindle of the gantry CNC machining center connected thereto to move, facilitating the machining of workpieces. During the movement of the slide, the wiping ring 7 wipes off the impurities attached to the fixing plate 1, facilitating the movement of the roller 9. The telescopic tube 21 protects the ball screw 20, preventing the chips generated during the workpiece machining from falling on the ball screw 20. Moreover, the oil pump 5 can pump the cooled lubricating oil into the first oil injection ring 15 and the second oil injection ring 11. The lubricating oil sprayed by the first oil injection ring 15 is sprayed onto the ball screw 20 to lubricate the ball nut 16, reducing the friction force and frictional heat between the ball nut 16 and the ball screw 20. The lubricating oil sprayed by the second oil injection ring 11 is sprayed onto the fixing plate 1 to lubricate the roller 9, reducing the friction force and frictional heat between the roller 9 and the fixing plate 1, and extending the service life of the transmission structure.

[0040] The standard parts used in the present utility model can all be purchased from the market. The special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts, and equipment all adopt conventional models in the prior art, which will not be elaborated here. The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art. Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A transmission structure of a gantry CNC machining center, comprising a fixed plate (1) and a slide seat, characterized in that: A ball screw (20) is movably connected to one side of the fixed plate (1), and the outer ring of the ball screw (20) is threadedly connected to a ball nut (16). The sliding seat comprises an active part connected to the ball nut (16) and a driven part movably connected to the fixed plate (1), and the active part and the driven part are fixedly connected. The outer rings of both ends of the ball screw (20) are wrapped with telescopic tubes (21), one end of the telescopic tube (21) is connected to the active part, and the other end of the telescopic tube (21) is connected to the fixed plate (1); The active part comprises a fixed part (3) fixedly connected to the driven part and a disassembly part (18) connected to the fixed part (3) by bolts, the middle part of the fixed part and the middle part of the disassembly part (18) are both provided with grooves, the two grooves form a through hole adapted to the ball nut (16), the outer ring of the ball nut (16) is provided with a limit groove (17), the inner cavity of the groove is fixed with a limit block (19) adapted to the limit groove (17), and both ends of the groove are provided with a first cooling structure; a cooling lubricating oil tank (6) and an oil pump (5) are fixed to the top of the active part, the liquid inlet end of the oil pump (5) is connected to the cooling lubricating oil tank (6) through an oil inlet pipe, the driven part comprises a driven sleeve (4) fixedly connected to the fixed part (3), the driven sleeve (4) is in contact with the fixed plate (1) through a roller (9), and both ends of the driven sleeve (4) are provided with a second cooling structure, and a refrigerator (22) is provided in the cooling lubricating oil tank (6); The first cooling structure comprises an oil injection ring (15) fixedly connected to the active part, and sponge rings (14) adapted to the ball screw (20) are provided on both sides of the oil injection ring (15), and the oil injection ring (15) is connected to the oil outlet end of the oil pump (5) through a first oil pipe (12); the second cooling structure comprises a wiping ring (7) and an oil injection ring (11) movably connected to the fixed plate (1), and sponge rings (10) are provided on both sides of the oil injection ring (11), and the oil injection ring (11) is connected to the oil outlet end of the oil pump (5) through a second oil pipe (8).

2. The transmission structure of a gantry CNC machining center according to claim 1, characterized in that: The inner wall of the sponge ring (14) contacts the outer surface of the ball screw (20), the inner wall of the sponge ring (14) is coated with an oleophobic coating, and the sponge ring (14) is a semicircular structure.

3. The transmission structure of a gantry CNC machining center according to claim 1, characterized in that: The inner walls of both the second sponge ring (10) and the wiping ring (7) are in contact with the outer surface of the fixing plate (1), and the outer surface of the wiping ring (7) and the inner wall of the second sponge ring (10) are both coated with an oleophobic coating.

4. The transmission structure of a gantry CNC machining center according to claim 1, characterized in that: The inner wall of the driven sleeve (4) is movably connected to a roller (9), and the roller (9) contacts the outer surface of the fixed plate (1). One end of the fixed plate (1) is fixedly connected to a rotating motor (2), and the end of the output shaft of the rotating motor (2) is fixedly connected to one end of the ball screw (20).

5. The transmission structure of a gantry CNC machining center according to claim 1, characterized in that: One end of each of the first oil pipe (12) and the second oil pipe (8) is provided with an electric ball valve.

6. The transmission structure of a gantry CNC machining center according to claim 1, characterized in that: Both ends of the disassembly portion (18) and one end of the fixing portion (3) are provided with bolt holes (13) adapted to be bolted.

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