Assembling structure of sliding table lead screw on machine tool workbench

Abstract

The utility model discloses an assembling structure of a sliding table lead screw on a machine tool workbench, which comprises a base arranged on the workbench, the base is provided with a driver, the sliding table lead screw, a coupler assembly, a protective supporting seat and the like, one end of the base far away from the driver is provided with a semi-open type bearing seat, a bearing assembly is arranged in the bearing seat, and the bearing assembly is connected with the driver. The other end of the sliding table lead screw penetrates through the bearing seat and is connected with the bearing assembly. The assembling structure can effectively connect and support the sliding table lead screw, drive the sliding table lead screw to rotate and improve the installation and operation stability of the sliding table lead screw, so that the moving stability and accuracy of the sliding table can be improved, the machining stability and precision of a whole machine tool are improved, and the machining efficiency is improved. The machining error caused by equipment installation is reduced, the connecting parts at the two ends of the sliding table lead screw can be protected, and the adverse effects of sweeps generated in the machining process of a machine tool and sprayed cooling liquid on the connecting parts are avoided.

Description

Technical Field

[0001] This utility model relates to the field of machine tool equipment technology, specifically to an assembly structure for a slide screw on a machine tool worktable. Background Technology

[0002] The worktable is one of the most important components of a machine tool, serving as the main platform for supporting the machine's machining components and the workpiece to be processed. Machine tool worktables typically feature moving parts such as slides to enhance control flexibility. Most slides are driven by servo motors and lead screws. The quality of the lead screw installation and connection, as well as the stability of power transmission, directly impacts the stable operation of the slide. The stability and accuracy of the slide's movement, in turn, affect the machining precision of the machine tool. Therefore, the installation of the lead screw is crucial for machine tool assembly.

[0003] In addition, during many machining processes, coolant is sprayed onto the machining area to cool or rinse the workpiece. This coolant will inevitably splash into the area where the slide is located, and the waste generated during the machining process will also splash into the slide area. If this liquid or waste enters the transmission part of the lead screw, it will have an adverse effect on the stable operation of the slide and will also increase the amount of cleaning work after machining. Summary of the Invention

[0004] The purpose of this utility model is to address the problems existing in the prior art by providing an assembly structure for the slide screw on a machine tool worktable.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] An assembly structure for a slide screw on a machine tool worktable includes a base mounted on the worktable, a driver mounted on the base, an output shaft of the driver connected to the slide screw, the output shaft connected to one end of the slide screw via a coupling assembly, a protective support seat provided at the connection point between the output shaft and the slide screw, the protective support seat having a support portion rotatably connected to the slide screw, and a protective portion disposed at the end of the support portion, the end of the protective portion abutting against the end face of the driver, so that the protective portion forms a closed chamber accommodating the coupling assembly; a semi-open bearing seat is provided at one end of the base away from the driver, a bearing assembly is disposed within the bearing seat, and the other end of the slide screw passes through the bearing seat and is connected to the bearing assembly.

[0007] This assembly structure effectively connects and supports the slide table lead screw, driving its rotation and improving its installation and operational stability. This, in turn, enhances the slide table's movement stability and accuracy, ultimately improving the overall machining stability and precision of the machine tool and reducing machining errors caused by equipment installation. Furthermore, it protects the connecting parts at both ends of the slide table lead screw, preventing the adverse effects of machining debris and sprayed coolant on the connection points. It also eliminates the need for post-processing cleaning of the connection points, reducing workload.

[0008] Furthermore, the protective support base is an integrated structure or a structure with an installation notch at the bottom, and a support base plate is provided below the protective support base, which is connected to the base by several bolts.

[0009] Furthermore, the inner periphery of the end of the protective part and the end face of the driver are provided with a mutually cooperating concave-convex structure, and the end face of the driver is connected to the end of the protective part by a number of screws.

[0010] Furthermore, the inner circumference of the support portion is rotatably connected to the slide screw via several bearings, the inner end face of the support portion is connected to an inner end cover, and a first step structure is provided near the port on the inner circumference of the support portion. Several bearings are arranged in the area between the inner end cover and the first step structure.

[0011] Furthermore, a limiting bushing is fitted on the outer periphery of the slide screw where the inner end cover is located. One end of the limiting bushing abuts against the bearing, and the other end abuts against the first locking nut, which is screwed onto the slide screw.

[0012] Furthermore, the coupling assembly includes a pair of half couplings, which are arranged opposite to each other and respectively sleeved on the output shaft and the slide screw. A plurality of diaphragms are provided between the pair of half couplings and connected together by a plurality of bolts. A limiting disc is also sleeved on the output shaft and the slide screw, and the limiting disc is disposed at the end of the half coupling and connected and fixed to the half coupling by bolts.

[0013] Furthermore, the bearing housing has an opening on the side facing away from the driver, and a second step structure is provided inside the opening, and the bearing assembly is installed at the second step structure.

[0014] Furthermore, the bearing assembly includes an inner ring sleeved on the slide screw, and a first outer ring, a second outer ring, and a third outer ring. A plurality of rollers are provided between the first outer ring and the inner ring. The second outer ring is connected to the bearing seat by bolts. The two ends of the second outer ring are respectively connected to the first outer ring and the third outer ring by bolts. The slide screw is also sleeved with a bearing front end cap and a bearing rear end cap that abut against the two ends of the inner ring. The end of the slide screw is also provided with a plurality of second locking nuts that abut against the bearing rear end cap.

[0015] Furthermore, the second outer ring has several axial through holes arranged around the central axis, and each axial through hole is provided with a spring. One end of the spring abuts against the end face of the first outer ring, and the other end abuts against a limiting ring located on the inner circumference of the third outer ring.

[0016] Compared with the prior art, the beneficial effects of this utility model are: 1. This assembly structure can effectively connect and support the slide table screw and drive the slide table screw to rotate, improving the installation and operation stability of the slide table screw, thereby improving the movement stability and accuracy of the slide table, which in turn helps to improve the machining stability and precision of the entire machine tool and reduce machining errors caused by equipment installation; 2. The protective support seat uses its support part and the bearing seat to support both ends of the slide table screw, and uses the closed cavity formed by its protective part to protect the connection part. The coupling assembly will not be exposed to the outside, and the bearing assembly will not be exposed to the outside, which can effectively prevent waste liquid and waste residue from entering the connection part and transmission part, reduce the risk of damage to the connection part and transmission part, ensure the stability of transmission, and extend service life. Attached Figure Description

[0017] Figure 1 This is an overall schematic diagram of the assembly structure of the slide screw on the machine tool worktable according to the present invention;

[0018] Figure 2 This is a cross-sectional structural diagram of the connection between the slide table lead screw and the output shaft of this utility model;

[0019] Figure 3 This is a three-dimensional structural diagram of the connection between the slide table lead screw and the output shaft of this utility model;

[0020] Figure 4 This is a three-dimensional structural diagram of the protective support base of this utility model;

[0021] Figure 5 This is a schematic diagram of the connection between the lead screw and the bearing seat of the slide table according to this utility model;

[0022] Figure 6 This is a schematic cross-sectional view of the connection between the slide screw and the bearing seat of this utility model.

[0023] Figure 7 This is a schematic diagram of the connection between the slide table lead screw and the bearing assembly of this utility model;

[0024] Figure 8 This is a schematic diagram of the structure of the second outer ring in the bearing assembly of this utility model;

[0025] In the diagram: 1. Worktable; 2. Base; 3. Driver; 301. Output shaft; 4. Slide screw; 5. Protective support seat; 501. Support part; 502. Protective part; 503. Enclosed chamber; 504. Support base plate; 505. First step structure; 6. Bearing seat; 601. Opening cavity; 602. Second step structure; 7. Slide table; 8. Slide rail; 9. Concave-convex structure; 10. Bearing; 11. Inner end cover; 12. Limiting bushing; 13. First locking nut; 14. Half coupling; 15. Diaphragm; 16. Limiting disc; 17. Inner ring; 18. First outer ring; 19. Second outer ring; 20. Third outer ring; 21. Roller; 22. Bearing front end cover; 23. Bearing rear end cover; 24. Second locking nut; 25. Axial through hole; 26. Spring; 27. Limiting ring. Detailed Implementation

[0026] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0027] In the description of this utility model, it should be noted that the terms "middle," "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] like Figures 1-6As shown, an assembly structure for a slide screw on a machine tool worktable includes a base 2 mounted on a worktable 1. A driver 3 is mounted on the base 2. The output shaft 301 of the driver 3 is connected to a slide screw 4. The output shaft 301 is connected to one end of the slide screw 4 via a coupling assembly. A protective support 5 is provided at the connection point between the output shaft 301 and the slide screw. The protective support 5 has a support portion 501 rotatably connected to the slide screw 4, and a protective portion 502 located at the end of the support portion 501. The end of the protective portion 502 abuts against the end face of the driver 3, forming a closed chamber 503 that accommodates the coupling assembly. A semi-open bearing seat 6 is provided at one end of the base 2 away from the driver 3. A bearing assembly is housed within the bearing seat 6. The other end of the slide screw 4 passes through the bearing seat 6 and is connected to the bearing assembly.

[0029] This assembly structure effectively connects and supports the slide table lead screw, driving its rotation and improving its installation and operational stability. This, in turn, enhances the movement stability and accuracy of the slide table, thereby improving the overall machining stability and precision of the machine tool and reducing machining errors caused by equipment installation. Furthermore, it protects the connecting parts at both ends of the slide table lead screw, preventing the adverse effects of machining debris and sprayed coolant on the connection points during machining.

[0030] The protective support base 5 supports both ends of the slide screw 4 using its support part 501 and the bearing seat 6, and the closed cavity formed by its protective part 502 protects the connection parts. The coupling assembly and the bearing assembly are not exposed to the outside. This effectively prevents waste liquid and waste residue from entering the connection and transmission parts, reduces the risk of damage to the connection and transmission parts, ensures transmission stability, and extends service life.

[0031] In addition to serving as a shaft connection and power transmission component, the coupling assembly can dynamically compensate for displacement and improve the dynamic characteristics of the shaft system, reduce transmission errors, and enhance accuracy and stability. The protective part 502 allows it to better fulfill these functions. Furthermore, there is no need to install an additional independent protective cover at the coupling.

[0032] The semi-open bearing housing 6 can both cooperate with the bearing assembly to support the slide screw and facilitate the installation of the bearing assembly.

[0033] In this embodiment, the slide table lead screw 4 is provided with a lead screw sleeve, which is connected to the slide table 7. The two sides of the slide table 7 are respectively connected to the slide rails 8 on both sides of the base through several sliders to play a guiding and supporting role.

[0034] Furthermore, the protective support base 5 is an integrated structure, and a support base plate 504 is provided below the protective support base 5. The support base plate 504 is connected to the base 2 by several bolts.

[0035] The inner periphery of the end of the protective part 502 and the end face of the driver 3 are provided with a mating concave-convex structure 9. The concave-convex structure 9 can form a positioning and sealing structure so that the two can be accurately connected. The end face of the driver 3 is connected to the end of the protective part 502 by a number of screws. The driver 3 can be a rotary cylinder, servo motor, etc.

[0036] In this embodiment, the driver 3 is provided with a detachable cover. The end face of the cover is connected to the end of the protective part 502. Since the protective support 5 is provided with the coupling assembly in its closed cavity, the cover can be installed on the outer cover of the driver 3 after the coupling assembly is connected to the output shaft 301 and the slide screw 4. The cover is fixed to the end of the protective part 502 by several screws.

[0037] In some other embodiments, the bottom of the protective support base 5 is provided with an installation notch, which is located between a pair of support base plates 504. In this case, there are no special requirements for the cover of the driver 3. The installation notch is used directly to connect and install internal components such as couplings. After installation, the support base plate 504 can be flipped over and fixed on the base 2.

[0038] Furthermore, the inner circumference of the support portion 501 is rotatably connected to the slide screw 4 via a plurality of bearings 10. An inner end cap 11 is connected to the inner end face of the support portion 501. A first step structure 505 is provided near the port on the inner circumference of the support portion 501. The plurality of bearings 10 are arranged in the area between the inner end cap 11 and the first step structure 505. The first step structure 505 and the inner end cap 11 effectively limit the axial movement of these bearings 10 (outer rings), allowing them to provide good rotatable support for the slide screw.

[0039] Furthermore, a limiting sleeve 12 is fitted around the outer periphery of the slide screw 4 where the inner end cover 11 is located. One end of the limiting sleeve 12 abuts against the bearing 10, and the other end abuts against the first locking nut 13, which is screwed onto the slide screw 4. The limiting sleeve 12 and the shoulder on the slide screw 4 can further limit the bearings 10 (inner rings), and the first locking nut 13 can lock them axially, with the tightness adjustable according to the degree of tightening.

[0040] Furthermore, the coupling assembly includes a pair of half-couplings 14, which are arranged opposite to each other and respectively sleeved on the output shaft 301 and the slide screw 4. A plurality of diaphragms 15 are provided between the pair of half-couplings 14 and connected together by a plurality of bolts. A limiting disc 16 is also sleeved on the output shaft 301 and the slide screw 4, respectively. The limiting disc 16 is disposed at the end of the half-coupling 14 and connected and fixed to the half-coupling by bolts. Specifically, an annular insertion interface is provided on the inner circumference of the end of the half-coupling, and the axial end of the limiting disc 16 is inserted into the annular insertion interface.

[0041] This type of coupling assembly not only facilitates the connection between the output shaft 301 and the slide screw 4, but also provides good synchronization performance, ensuring that both rotate synchronously and transmit motion and torque. The diaphragm 15 can also compensate for the relative displacement between the two, such as axial offset, axis deviation caused by installation errors, radial offset, etc., thereby improving the transmission stability of the slide screw 4 and reducing its offset, which helps to ensure the stability and accuracy of the movement of the slide driven by it.

[0042] Furthermore, in combination Figures 5-8 As shown, the bearing housing 6 has an opening 601 on the side facing away from the driver, and a second step structure 602 is provided inside the opening 601. The bearing assembly is installed at the second step structure 602. The opening 601 facilitates the installation of the bearing assembly, and placing it on the outer end face can also prevent liquids and waste from splashing in from above or the middle of the machine tool; the second step structure 602 provides a better connection and installation position.

[0043] Furthermore, the bearing assembly includes an inner ring 17 sleeved on the slide screw 4, and a first outer ring 18, a second outer ring 19, and a third outer ring 20. A plurality of rollers 21 and roller retainers are provided between the first outer ring 18 and the inner ring 17. The second outer ring 19 is connected to the bearing seat 6 by bolts. The two end faces of the second outer ring 19 are respectively connected to the first outer ring 18 and the third outer ring 20 by bolts. The slide screw 4 is also sleeved with a bearing front end cap 22 and a bearing rear end cap 23 abutting against the two ends of the inner ring 17. The end of the slide screw 4 is also provided with a plurality of second locking nuts 24 abutting against the bearing rear end cap 23.

[0044] The inner ring 17, the first outer ring 18, the second outer ring 19, and the third outer ring 20 can be pre-assembled to form a complete bearing assembly before being fitted onto the end of the slide screw 4 for installation. The second outer ring 19 not only connects and fixes the entire bearing assembly within the bearing seat 6, but also connects the first outer ring 18 and the third outer ring 20 on both sides, and can be appropriately locked at the end using the second locking nut 24.

[0045] Furthermore, the second outer ring 19 has several axial through holes 25 arranged around its central axis. Each of the axial through holes 25 contains a spring 26. One end of each spring 26 abuts against the end face of the first outer ring 18, and the other end abuts against a limiting ring 27 located on the inner circumference of the third outer ring 20. The spring 26, positioned within the bearing housing, ensures smooth bearing reset and stable operation. During movement, it smoothly returns to its initial position while also providing support, improving the axial force on the bearing, and enhancing support stability.

[0046] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An assembly structure of a slide table screw rod on a machine tool worktable, comprising a base arranged on the worktable, a drive is arranged on the base, and an output shaft of the drive is connected with a slide table screw rod, characterized in that, The output shaft is connected to one end of the slide screw via a coupling assembly. A protective support is provided at the connection between the output shaft and the slide screw. The protective support has a support portion that is rotatably connected to the slide screw, and a protective portion disposed at the end of the support portion. The end of the protective portion abuts against the end face of the driver, so that the protective portion forms a closed chamber to accommodate the coupling assembly. A semi-open bearing seat is provided at one end of the base away from the driver. A bearing assembly is disposed in the bearing seat. The other end of the slide screw passes through the bearing seat and is connected to the bearing assembly.

2. The assembly structure of the slide-on-lathe-bed-surface screw rod according to claim 1, characterized in that, The protective support base is an integrated structure, and a support base plate is provided below the protective support base. The support base plate is connected to the base by several bolts.

3. The assembly structure of the slide-on-lathe-bed-surface screw rod according to claim 1, wherein, The inner periphery of the end of the protective part and the end face of the driver are provided with a mating concave-convex structure, and the end face of the driver is connected to the end of the protective part by a number of screws.

4. The assembly structure of the slide-on-trestle screw of the machine tool worktable according to claim 1, characterized in that, The inner circumference of the support part is rotatably connected to the slide screw through a number of bearings. An inner end cover is connected to the inner end face of the support part. A first step structure is provided near the port on the inner circumference of the support part. A number of the bearings are arranged in the area between the inner end cover and the first step structure.

5. The assembly structure of the slide screw on the machine tool worktable according to claim 4, characterized in that, The slide screw is fitted with a limiting bushing in the outer peripheral area where the inner end cover is provided. One end of the limiting bushing abuts against the bearing, and the other end abuts against the first locking nut, which is screwed onto the slide screw.

6. The assembly structure of the slide-on-trestle screw of the machine tool worktable according to claim 1, characterized in that, The coupling assembly includes a pair of half couplings, which are arranged opposite to each other and respectively sleeved on the output shaft and the slide screw. Several diaphragms are provided between the pair of half couplings and connected together by several bolts. Limiting discs are also respectively sleeved on the output shaft and the slide screw. The limiting discs are located at the ends of the half couplings and are connected and fixed to the half couplings by bolts.

7. The assembly structure of the slide-on-trestle screw of the machine tool worktable according to claim 1, characterized in that, The bearing housing has an opening on the side facing away from the driver, and a second step structure is provided inside the opening. The bearing assembly is installed at the second step structure.

8. The assembly structure of the slide-on-trestle screw of the machine tool worktable according to claim 1, characterized in that, The bearing assembly includes an inner ring sleeved on the slide screw, and a first outer ring, a second outer ring, and a third outer ring. A plurality of rollers are provided between the first outer ring and the inner ring. The second outer ring is connected to the bearing seat by bolts. The two ends of the second outer ring are respectively connected to the first outer ring and the third outer ring by bolts. The slide screw is also sleeved with a bearing front end cap and a bearing rear end cap that abut against the two ends of the inner ring. The end of the slide screw is also provided with a plurality of second locking nuts that abut against the bearing rear end cap.

9. The assembly structure of the slide-on-trestle screw of the machine tool worktable according to claim 8, characterized in that, The second outer ring has several axial through holes arranged around its central axis. Each of the axial through holes is equipped with a spring. One end of the spring abuts against the end face of the first outer ring, and the other end abuts against a limiting ring located on the inner circumference of the third outer ring.

Images