Dual-motor anti-backlash indexing turning and milling composite spindle device

Abstract

The utility model discloses a double motor anti-backlash indexing turn-milling composite spindle device relates to horizontal turn-milling composite machining center machine tool spindle field, include: spindle, rotation setting in the spindle box body, and one end of spindle is used for with spindle motor drive connection, two C axle assemblies are set up on the spindle box body, and C axle assembly includes C axle slip gear and servo motor, and the translation direction of C axle slip gear is parallel with the axial direction of spindle, and servo motor passes through C axle spline shaft and C axle slip gear slip connection, hydraulic combination oil cylinder sets up on the spindle box body, and hydraulic combination oil cylinder includes the right end piston rod of telescopic movement, and right end piston rod is connected with two C axle slip gear through the yoke, when right end piston rod telescopic movement, yoke drives C axle slip gear and the meshing or disengaging of main shaft gear on spindle, this device meets high accuracy, high rigidity, high reliability, still has compact structure, easy installation and so on.

Description

Technical Field

[0001] This utility model belongs to the field of horizontal turning and milling composite machining center spindles, and more specifically, relates to a dual-motor backlash-eliminating indexing turning and milling composite spindle device. Background Technology

[0002] Traditional horizontal milling and turning machining centers use mechanical backlash-free indexing on the spindle to combine turning and milling functions. Wear on the mechanical backlash-free indexing structure reduces C-axis indexing accuracy, lowers reliability, and results in poor rigidity and accuracy retention. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a dual-motor backlash-free indexing milling and turning composite spindle device. This device not only meets the requirements of high precision, high rigidity, and high reliability, but also features a compact structure and easy installation and adjustment.

[0004] To achieve the above objectives, this utility model provides a dual-motor backlash-free indexing milling and turning composite spindle device, comprising:

[0005] The spindle is rotatably mounted in the spindle housing, and one end of the spindle is used to connect to the spindle motor drive.

[0006] Two C-axis assemblies are mounted on the spindle housing. Each C-axis assembly includes a C-axis sliding gear and a servo motor. The translational direction of the C-axis sliding gear is parallel to the axial direction of the spindle. The servo motor is slidably connected to the C-axis sliding gear via a C-axis spline shaft.

[0007] A hydraulic combination cylinder is mounted on the spindle housing. The hydraulic combination cylinder includes a retractable right piston rod. The right piston rod is connected to two C-axis sliding gears via a shift fork. When the right piston rod retracts, the shift fork drives the C-axis sliding gears to engage or disengage with the spindle gears on the spindle.

[0008] Optionally, the two C-axis sliding gears are not on the same plane.

[0009] Optionally, it also includes a detection component, the detection component comprising:

[0010] A shaft is slidably mounted on the main shaft housing via a sleeve, and one end of the shaft is fixed to the shift fork.

[0011] A rocker block is mounted on the other end of the shaft;

[0012] A switch bracket is connected to the spindle housing. A first proximity switch, a second proximity switch, and a third proximity switch are respectively provided on the switch bracket. The rocker block cooperates with the first proximity switch, the second proximity switch, and the third proximity switch.

[0013] Optionally, both ends of the spindle are connected to the spindle housing via a front spindle bearing and a rear spindle bearing.

[0014] Optionally, a flat key is provided on the outer side of the spindle and the inner side of the spindle gear, and the two ends of the spindle gear are respectively fitted to the locking nut and the inner wall of the spindle housing.

[0015] Optionally, a reducer connecting plate and a reducer are provided between the output end of the servo motor and the C-axis spline shaft, and the reducer connecting plate is connected to the spindle housing.

[0016] Optionally, the hydraulic combination cylinder further includes:

[0017] The hydraulic cylinder connecting plate is mounted on the main spindle housing;

[0018] The left end cap of the hydraulic cylinder is located on one side of the hydraulic cylinder connecting plate;

[0019] The left-end cylinder is movably mounted on one side of the cylinder connecting plate, and the left-end piston rod of the left-end cylinder movably passes through the cylinder connecting plate;

[0020] The right-end cylinder is movably mounted on the other side of the cylinder connecting plate. The left-end piston rod is connected to the right-end cylinder, and the right-end piston rod on the right-end cylinder movably passes through the right-end cylinder end cover.

[0021] Optionally, the left end cylinder end cap, the left end cylinder, and the left end piston rod together form a first oil chamber, and the left end cylinder, the left end piston rod, and the cylinder connecting plate together form a second oil chamber, with the first oil chamber and the second oil chamber being arranged correspondingly.

[0022] Optionally, the cylinder connecting plate, the right-end cylinder, and the right-end piston rod together form a third oil chamber, and the right-end cylinder, the right-end piston rod, and the right-end cylinder end cap together form a fourth oil chamber, with the third oil chamber and the fourth oil chamber being arranged correspondingly.

[0023] Optionally, the two C-axis splined shafts are arranged symmetrically about the axis of the main shaft.

[0024] This invention provides a dual-motor backlash-eliminating indexing milling and turning composite spindle device. Its advantages include: the device employs dual-motor backlash-eliminating indexing, eliminating errors caused by mechanical wear and improving C-axis indexing accuracy. It is easy to install, maintain, and has a compact structure. Furthermore, the C-axis sliding gear can be disengaged from the spindle gear, reducing wear on the C-axis sliding gear during turning. The backlash-eliminating gear is driven by a hydraulic combination cylinder, ensuring smooth gear switching.

[0025] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0026] The above and other objects, features and advantages of the present invention will become more apparent from the accompanying drawings, in which like reference numerals generally represent like parts.

[0027] Figure 1 An internal unfolded view of a dual-motor backlash-free indexing milling and turning composite spindle device according to an embodiment of the present invention is shown.

[0028] Figure 2 A schematic diagram showing the connection between a hydraulic combination cylinder and a detection component according to an embodiment of the present invention is provided.

[0029] Figure 3 A cross-sectional structural schematic diagram of a dual-motor backlash-free indexing milling and turning composite spindle device according to an embodiment of the present invention is shown.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Spindle housing; 2. C-axis sliding gear; 3. C-axis splined shaft; 4. Locking nut; 5. Flat key; 6. Spindle; 7. Spindle gear; 8. Spindle front bearing; 9. Shift fork; 10. Right piston rod; 11. Reducer; 12. Right cylinder end cover; 13. Right cylinder; 14. Left piston rod; 15. Shaft; 16. Cylinder connecting plate; 17. Sleeve; 18. First proximity switch; 19. Switch bracket; 20. Second proximity switch; 21. Third proximity switch; 22. Rocker; 23. Left cylinder; 24. Second oil chamber; 25. First oil chamber; 26. Third oil chamber; 27. Left cylinder end cover; 28. Fourth oil chamber; 29. ​​Servo motor; 30. Reducer connecting plate; 31. Spindle rear bearing. Detailed Implementation

[0032] Preferred embodiments of the present invention will now be described in more detail. While preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0033] This utility model provides a dual-motor backlash-free indexing milling and turning composite spindle device, comprising:

[0034] The spindle is rotatably mounted in the spindle housing, and one end of the spindle is used to connect to the spindle motor drive.

[0035] Two C-axis assemblies are mounted on the spindle housing. Each C-axis assembly includes a C-axis sliding gear and a servo motor. The translational direction of the C-axis sliding gear is parallel to the axial direction of the spindle. The servo motor is slidably connected to the C-axis sliding gear via a C-axis spline shaft.

[0036] The hydraulic combination cylinder is mounted on the spindle housing. The hydraulic combination cylinder includes a retractable right piston rod, which is connected to two C-axis sliding gears via a shift fork. When the right piston rod retracts, the shift fork drives the C-axis sliding gears to engage or disengage with the spindle gears on the spindle.

[0037] Specifically, the spindle assembly includes a spindle gear and a C-axis sliding gear. The spindle gear is fixedly mounted on the spindle. When turning is required, the spindle motor drives the spindle to rotate, thus turning the workpiece. When milling is required, the C-axis sliding gear moves axially on the C-axis spline shaft using a shift fork, meshing with the spindle gear. A servo motor provides power, causing the C-axis spline shaft to drive the C-axis sliding gear to rotate, ultimately achieving the meshing of the spindle gears and the spindle rotation. This results in highly precise spindle rotation angles and accurate workpiece positioning. Additionally, the spindle assembly includes a hydraulic combination cylinder, which drives the shift fork to reciprocate, switching between the engagement and disengagement states of the C-axis shift gear and the spindle gear.

[0038] Optionally, the two C-axis sliding gears are not on the same plane.

[0039] Optionally, the two C-axis splined axes are arranged symmetrically about the axis of the spindle.

[0040] Specifically, two C-axis splined shafts are symmetrically arranged on the outer periphery of the main shaft, and a hydraulic combination cylinder is set on the other side of the two C-axis splined shafts. The shift fork moves synchronously with the two C-axis sliding gears. However, since the two C-axis sliding gears are not on the same plane, the two C-axis sliding gears mesh with the main shaft gear in sequence, which can ensure that the gears are properly meshed and avoid the situation of mutual tooth knocking.

[0041] Optionally, it also includes a detection component, which includes:

[0042] The shaft is slidably mounted on the spindle housing via a sleeve, and one end of the shaft is fixed to the shift fork.

[0043] A rocker block is mounted on the other end of the shaft;

[0044] A switch bracket is connected to the spindle housing. A first proximity switch, a second proximity switch, and a third proximity switch are respectively installed on the switch bracket. A rocker block cooperates with the first proximity switch, the second proximity switch, and the third proximity switch.

[0045] Specifically, a detection component is installed on the spindle housing. Three proximity switches are fixedly installed on the spindle housing, with their orientation parallel to the spindle's axial direction. When the shift fork moves the C-axis sliding gear, the shaft and the rocker block move synchronously with the shift fork. The position of the rocker block relative to the corresponding switch indicates the relative engagement state between the C-axis sliding gear and the spindle gear. When the rocker block moves to the sensing range of the first proximity switch, it indicates that both C-axis sliding gears driven by the shift fork are engaged with the spindle gear. When the rocker block moves to the sensing range of the second proximity switch, it indicates that one C-axis sliding gear is engaged with the spindle gear, while the other is disengaged. When the rocker block moves to the sensing range of the third proximity switch, it indicates that both C-axis sliding gears are disengaged from the spindle.

[0046] Optionally, both ends of the spindle are connected to the spindle housing via a front spindle bearing and a rear spindle bearing.

[0047] Optionally, a flat key is provided on the outer side of the spindle and the inner side of the spindle gear, and the two ends of the spindle gear are respectively fitted to the locking nut and the inner wall of the spindle housing.

[0048] Specifically, the spindle rotates with the spindle housing through two bearings, ensuring that the spindle's relative position on the spindle housing is fixed. In addition, the axial position of the spindle gear on the spindle can also be kept stable. When the shift fork drives the C-axis sliding gear to switch between meshing and disengaging with the spindle gear, the positional relationship between the two gears can be accurately switched.

[0049] Optionally, a reducer connecting plate and a reducer are provided between the output end of the servo motor and the C-axis spline shaft, and the reducer connecting plate is connected to the spindle housing.

[0050] Specifically, the output of the servo motor drives the C-axis spline shaft to rotate through the connecting plate and the reducer. This allows the C-axis sliding gear to drive the spindle gear to rotate precisely, so that the spindle can rotate the workpiece to the required machining angle position.

[0051] Optionally, the hydraulic combination cylinder also includes:

[0052] The hydraulic cylinder connecting plate is mounted on the spindle box.

[0053] The left end cap of the hydraulic cylinder is located on one side of the hydraulic cylinder connecting plate;

[0054] The left-end hydraulic cylinder is movably mounted on one side of the hydraulic cylinder connecting plate, and the left-end piston rod of the left-end hydraulic cylinder movably passes through the hydraulic cylinder connecting plate;

[0055] The right-end cylinder is movably mounted on the other side of the cylinder connecting plate. The left-end piston rod is connected to the right-end cylinder, and the right-end piston rod on the right-end cylinder moves through the right-end cylinder end cover.

[0056] Optionally, the left end cylinder cover, the left end cylinder, and the left end piston rod together form a first oil chamber, and the left end cylinder, the left end piston rod, and the cylinder connecting plate together form a second oil chamber, with the first oil chamber and the second oil chamber being arranged correspondingly.

[0057] Optionally, the oil cylinder connecting plate, the right-end oil cylinder and the right-end piston rod together form a third oil chamber, and the right-end oil cylinder, the right-end piston rod and the right-end oil cylinder end cover together form a fourth oil chamber, with the third oil chamber and the fourth oil chamber being set accordingly.

[0058] Specifically, the hydraulic combination cylinder includes a left-end cylinder and a right-end cylinder. When it is necessary to engage the C-axis sliding gear with the main shaft gear, oil is first injected into the first oil chamber. This causes the left-end piston rod to extend the right-end cylinder outward, which in turn moves the shift fork. When the left-end piston rod contacts the cylinder connecting plate, the left-end cylinder extends to its full position, and one of the C-axis sliding gears engages with the main shaft gear. Then, oil is injected into the third oil chamber, allowing the right-end piston rod to extend further, and the shift fork continues to move the C-axis sliding gear until both C-axis sliding gears are engaged with the main shaft gear. Conversely, when it is necessary to disengage the two C-axis sliding gears from the main shaft gear, oil is injected into the fourth and second oil chambers sequentially, causing the right-end piston rod to move the shift fork back.

[0059] Example

[0060] like Figures 1 to 3As shown, this utility model provides a dual-motor backlash-free indexing milling and turning composite spindle device, comprising:

[0061] The spindle 6 is rotatably mounted in the spindle housing 1, and one end of the spindle 6 is used to connect to the spindle motor drive.

[0062] Two C-axis assemblies are mounted on the spindle housing 1. Each C-axis assembly includes a C-axis sliding gear 2 and a servo motor 29. The translation direction of the C-axis sliding gear 2 is parallel to the axial direction of the spindle 6. The servo motor 29 is slidably connected to the C-axis sliding gear 2 via the C-axis spline shaft 3.

[0063] A hydraulic combination cylinder is mounted on the spindle housing 1. The hydraulic combination cylinder includes a retractable right piston rod 10. The right piston rod 10 is connected to two C-axis sliding gears 2 via a shift fork 9. When the right piston rod 10 retracts, the shift fork 9 drives the C-axis sliding gears 2 to engage or disengage with the spindle gears 7 on the spindle 6.

[0064] In this embodiment, the two C-axis sliding gears 2 are not on the same plane.

[0065] In this embodiment, a detection component is also included, which includes:

[0066] Shaft 15 is movably mounted on spindle housing 1 via sleeve 17, and one end of shaft 15 is fixed to shift fork 9;

[0067] The rocker block 22 is located on the other end of the shaft 15;

[0068] The switch bracket 19 is connected to the spindle housing 1. The switch bracket 19 is respectively equipped with a first proximity switch 18, a second proximity switch 20 and a third proximity switch 21. The rocker block 22 cooperates with the first proximity switch 18, the second proximity switch 20 and the third proximity switch 21.

[0069] In this embodiment, the two ends of the spindle 6 are connected to the spindle housing 1 through the front spindle bearing 8 and the rear spindle bearing 31.

[0070] In this embodiment, a flat key 5 is provided on the outer side of the spindle 6 and the inner side of the spindle gear 7, and the two ends of the spindle gear 7 are respectively attached to the locking nut 4 and the inner wall of the spindle housing 1.

[0071] In this embodiment, a reducer connecting plate 30 and a reducer 11 are provided between the output end of the servo motor 29 and the C-axis spline shaft 3. The reducer connecting plate 30 is connected to the spindle housing 1.

[0072] In this embodiment, the hydraulic combination cylinder further includes:

[0073] The hydraulic cylinder connecting plate 16 is mounted on the spindle housing 1;

[0074] The left end cap 27 of the hydraulic cylinder is located on one side of the hydraulic cylinder connecting plate 16;

[0075] The left-end cylinder 23 is movably mounted on one side of the cylinder connecting plate 16, and the left-end piston rod 14 on the left-end cylinder 23 is movably mounted on the cylinder connecting plate 16.

[0076] The right-end cylinder 13 is movably mounted on the other side of the cylinder connecting plate 16. The left-end piston rod 14 is connected to the right-end cylinder 13, and the right-end piston rod 10 on the right-end cylinder 13 is movably mounted on the right-end cylinder end cover 12.

[0077] In this embodiment, the left end cylinder cap 27, the left end cylinder 23 and the left end piston rod 14 together form a first oil chamber 25, and the left end cylinder 23, the left end piston rod 14 and the cylinder connecting plate 16 together form a second oil chamber 24. The first oil chamber 25 and the second oil chamber 24 are arranged correspondingly.

[0078] In this embodiment, the cylinder connecting plate 16, the right-end cylinder 13 and the right-end piston rod 10 together form a third oil chamber 26, and the right-end cylinder 13, the right-end piston rod 10 and the right-end cylinder end cap 12 together form a fourth oil chamber 28. The third oil chamber 26 and the fourth oil chamber 28 are arranged correspondingly.

[0079] In this embodiment, the two C-axis spline shafts 3 are symmetrically arranged with respect to the axis of the main shaft 6.

[0080] In summary, when the device needs to mill a workpiece, the workpiece is mounted on the spindle 6, and then oil is injected into the first oil chamber 25. This causes the right piston rod 10 to move the shift fork 9 to the right, thereby causing the shift fork 9 to move the two C-axis sliding gears 2 closer to the spindle gear 7. When the left piston rod 14 contacts the cylinder connecting plate 16, one of the C-axis sliding gears 2 meshes with the spindle gear 7. Next, oil is injected into the third oil chamber 26, and the right piston rod 10 continues to move the shift fork 9 to the right, causing the other C-axis sliding gear 2 to mesh with the spindle gear 7. Both C-axis sliding gears 2 are now meshed with the spindle gear 7, and the servo motor 29 drives the C-axis spline shaft 3 to rotate, thus enabling the C-axis sliding gears 2 to drive the spindle 6 to rotate precisely.

[0081] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A dual-motor backlash-free indexing milling and turning composite spindle device, characterized in that, include: The main spindle is rotatably mounted in the spindle housing, and one end of the main spindle is used to connect to the main spindle motor drive. Two C-axis assemblies are mounted on the spindle housing. Each C-axis assembly includes a C-axis sliding gear and a servo motor. The translational direction of the C-axis sliding gear is parallel to the axial direction of the spindle. The servo motor is slidably connected to the C-axis sliding gear via a C-axis spline shaft. A hydraulic combination cylinder is mounted on the spindle housing. The hydraulic combination cylinder includes a retractable right piston rod. The right piston rod is connected to two C-axis sliding gears via a shift fork. When the right piston rod retracts, the shift fork drives the C-axis sliding gears to engage or disengage with the spindle gears on the spindle.

2. The dual-motor backlash-free indexing milling and turning composite spindle device according to claim 1, characterized in that, The two C-axis sliding gears are not on the same plane.

3. The dual-motor backlash-free indexing milling and turning composite spindle device according to claim 1, characterized in that, It also includes a detection component, which includes: A shaft is slidably mounted on the main shaft housing via a sleeve, and one end of the shaft is fixed to the shift fork. A rocker block is mounted on the other end of the shaft; A switch bracket is connected to the spindle housing. A first proximity switch, a second proximity switch, and a third proximity switch are respectively provided on the switch bracket. The rocker block cooperates with the first proximity switch, the second proximity switch, and the third proximity switch.

4. The dual-motor backlash-free indexing milling and turning composite spindle device according to claim 1, characterized in that, The two ends of the spindle are connected to the spindle housing through a front spindle bearing and a rear spindle bearing.

5. The dual-motor backlash-free indexing milling and turning composite spindle device according to claim 4, characterized in that, A flat key is provided on the outer side of the main shaft and the inner side of the main shaft gear. The two ends of the main shaft gear are respectively attached to the locking nut and the inner wall of the main shaft housing.

6. The dual-motor backlash-free indexing milling and turning composite spindle device according to claim 1, characterized in that, A reducer connecting plate and a reducer are provided between the output end of the servo motor and the C-axis spline shaft, and the reducer connecting plate is connected to the spindle housing.

7. The dual-motor backlash-free indexing milling and turning composite spindle device according to claim 1, characterized in that, The hydraulic combination cylinder also includes: The hydraulic cylinder connecting plate is mounted on the main spindle housing; The left end cap of the hydraulic cylinder is located on one side of the hydraulic cylinder connecting plate; The left-end cylinder is movably mounted on one side of the cylinder connecting plate, and the left-end piston rod of the left-end cylinder movably passes through the cylinder connecting plate; The right-end cylinder is movably mounted on the other side of the cylinder connecting plate. The left-end piston rod is connected to the right-end cylinder, and the right-end piston rod on the right-end cylinder movably passes through the right-end cylinder end cover.

8. The dual-motor backlash-free indexing milling and turning composite spindle device according to claim 7, characterized in that, The left end cap of the hydraulic cylinder, the left end cylinder, and the left end piston rod together form a first oil chamber, and the left end cylinder, the left end piston rod, and the hydraulic cylinder connecting plate together form a second oil chamber. The first oil chamber and the second oil chamber are arranged correspondingly.

9. The dual-motor backlash-free indexing milling and turning composite spindle device according to claim 7, characterized in that, The oil cylinder connecting plate, the right-end oil cylinder, and the right-end piston rod together form a third oil chamber, and the right-end oil cylinder, the right-end piston rod, and the right-end oil cylinder end cap together form a fourth oil chamber. The third oil chamber and the fourth oil chamber are arranged correspondingly.

10. The dual-motor backlash-free indexing milling and turning composite spindle device according to claim 1, characterized in that, The two C-axis splined shafts are arranged symmetrically about the axis of the main shaft.

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