A large-torque high-rigidity five-axis head

Abstract

The application relates to a large-torque high-rigidity five-axis head, belonging to the technical field of five-axis heads, which comprises a shell, connecting shafts are rotationally connected to the two sides of the shell, all the connecting shafts are jointly connected with an A main shaft assembly, each connecting shaft is connected with a first driven gear, the same number of first servo motors as the connecting shafts are installed in the shell, the first servo motors are connected with first driving gears, the first driving gears correspond to the first driven gears one by one, the first driven gears are in mesh with the corresponding first driving gears, the first servo motors drive the first driving gears, the first driven gears and the connecting shafts to rotate in sequence, and all the first rotating shafts drive the A main shaft assembly to rotate around an X shaft. The application has the effect of realizing that the five-axis head can meet the machining of workpieces with different rigidity and improve the adaptability of the five-axis head.

Description

Technical Field

[0001] This application relates to the field of five-axis head technology, and in particular to a high-torque, high-rigidity five-axis head. Background Technology

[0002] The five-axis head is an important component of a five-axis CNC machine tool. When machining workpieces with high rigidity, a torque motor and a reducer are usually used as the drive source for the spindle in the A-axis (rotating around the X-axis) direction to ensure that the milling cutter on the spindle can smoothly cut the workpiece along the A-axis direction.

[0003] Regarding the aforementioned technologies, since torque motors need to rotate within a suitable speed range, if the speed of the torque motor is adjusted beyond its suitable speed range, the driving efficiency of the torque motor will decrease. Therefore, when using a torque motor as a drive source, the torque of the spindle connecting shaft of the five-axis head is usually unchangeable. This results in the inability to provide sufficient torque to the spindle when cutting workpieces with greater rigidity due to the limitations of the torque motor itself, thus preventing normal processing. Summary of the Invention

[0004] In order to enable the five-axis head to process workpieces with different stiffnesses and improve the adaptability of the five-axis head, this application provides a high-torque, high-rigidity five-axis head.

[0005] The high-torque, high-rigidity five-axis head provided in this application adopts the following technical solution:

[0006] A high-torque, high-rigidity five-axis head includes a housing, with connecting shafts rotatably connected to both sides of the housing. All the connecting shafts are connected to a main spindle assembly (A). Each connecting shaft is connected to a first driven gear. The housing contains the same number of first servo motors as the connecting shafts. Each first servo motor is connected to a first drive gear. The first drive gear corresponds one-to-one with the first driven gear, and the first driven gear meshes with the corresponding first drive gear. The first servo motors sequentially drive the first drive gear, the first driven gear, and the connecting shafts to rotate. All the connecting shafts together drive the main spindle assembly (A) to rotate around the X-axis.

[0007] A C-spindle body is fixedly connected to the housing, and a C-spindle mounting shell is rotatably connected to the C-spindle body. The C-spindle mounting shell is connected to the machine tool, and a drive assembly for driving the C-spindle body to rotate is provided on the C-spindle mounting shell.

[0008] By adopting the above technical solution, the first servo motor drives the first driving gear to rotate, the first driving gear drives the first driven gear to rotate, and the first driven gear drives the connecting shaft to rotate, thereby realizing the rotation of the A spindle assembly around the X-axis. The drive assembly drives the C spindle body to rotate, and the C spindle body drives the housing to rotate, thereby realizing the rotation of the A spindle assembly around the Z-axis.

[0009] The transmission ratio is adjusted by the cooperation of the first driving gear and the first driven gear, so that the first servo motor can provide the same torque to the connecting shaft for normal workpiece processing, just like the torque motor.

[0010] If only a single gear set is used, there will be a gap between the first driving gear and the first driven gear. A single gear set plus a servo motor cannot achieve the rotational accuracy and response speed of directly driving the connecting shaft with a torque motor. Therefore, by utilizing the principle of multi-gear sets and dual-motor backlash elimination, and driving according to the dual-motor backlash elimination control curve, the output torque of both first servo motors will never be zero simultaneously. That is, at any time, at least one of the two first servo motors will apply a non-zero torque to the corresponding first driving gear, eliminating the gap between the first driven gear and the first driving gear, thereby improving the response speed and rotational accuracy of the rotating shaft.

[0011] When machining workpieces with greater rigidity, the speed of the first servo motor can be adjusted. Therefore, by reducing the speed of the first servo motor, the first driven gear can provide greater torque to the connecting shaft, thereby enabling the five-axis head to machine workpieces with different rigidities and improving the adaptability of the five-axis head.

[0012] Optionally, idler gears are rotatably connected to both sides of the housing. The idler gear located on the same side of the housing meshes with the first driven gear and the first driving gear, and the idler gear is located between the first driven gear and the first driving gear.

[0013] By adopting the above technical solution, the setting of the idler gear can appropriately reduce the size of the first driving gear. Compared with directly meshing the first driving gear with the first driven gear, the combination of the first driving gear and the idler gear is conducive to reducing the space occupied by the housing, thereby appropriately reducing the size of the housing and reducing the space occupied by the housing on the machine tool.

[0014] Optionally, the drive assembly includes a second servo motor, which is mounted on the C-spindle mounting housing. The second servo motor is connected to a second drive gear, and the C-spindle body is connected to a second driven gear. The second drive gear meshes with the second driven gear.

[0015] By adopting the above technical solution, the transmission ratio is adjusted by the cooperation of the second driving gear and the second driven gear, so that the second servo motor can provide the same torque to the C spindle body for normal workpiece processing, just like the torque motor.

[0016] When machining workpieces with greater rigidity, the speed of the second servo motor can be adjusted. Therefore, by reducing the speed of the second servo motor, the second driven gear can provide greater torque to the C spindle body, thus improving the adaptability of the five-axis head.

[0017] Optionally, two second servo motors are mounted on the mounting housing, each of the two second servo motors is connected to a second drive gear, and both second drive gears simultaneously mesh with the second driven gear.

[0018] By adopting the above technical solution and utilizing the principle of dual-motor backlash elimination, the drive is performed according to the dual-motor backlash elimination control curve. There will never be a situation where the output torque of the two second servo motors is zero at the same time. That is, at any time, at least one of the two second servo motors will apply a non-zero torque to the corresponding second driving gear, eliminating the movement backlash between the second driving gear and the second driven gear, thereby improving the response speed and rotational accuracy of the C-spindle body.

[0019] Optionally, the second driven gear is an internal gear, and the second driving gear is located inside the second driven gear.

[0020] By adopting the above technical solution, the internal gear configuration can reduce the space occupied by the second drive gear, thereby appropriately reducing the size of the C-spindle mounting housing and reducing the space occupied by the C-spindle mounting housing on the machine tool.

[0021] Optionally, an A-axis reading head bracket is installed on one side of the housing, and an A-axis encoder for measuring the rotation angle of the connecting shaft is installed on the A-axis reading head bracket. A C-axis reading head bracket is installed on the C-spindle mounting housing, and a C-axis encoder for measuring the rotation angle of the C-spindle body is installed on the C-axis reading head bracket.

[0022] By adopting the above technical solution, the A-axis encoder can accurately read the rotation angle of the connecting shaft, and the C-axis encoder can accurately read the rotation angle of the C-axis spindle body, thereby improving the control of the rotation angle of the A-axis spindle assembly.

[0023] Optionally, the C-spindle body is a hollow shaft, and a cable guide tube is rotatably provided on the C-spindle body. The cable guide tube is coaxial with the C-spindle body. An installation slot is provided inside the housing, and the first servo motor is fixed in the installation slot. The housing has a connection port that communicates with the installation slot and the connection port communicates with the C-spindle body.

[0024] By adopting the above technical solution, the first servo motor is located in the mounting slot, which reduces the space occupied by the first servo motor and helps to reduce the size of the housing. Furthermore, the wiring can be connected to the first servo motor by passing through the C-spindle body and the connection port in sequence through the conduit, reducing the exposure of the wiring and improving the protection of the wiring.

[0025] Optionally, the A-axis assembly includes a spindle body and an A-spindle sleeve. The A-spindle sleeve is fitted onto and fixed to the A-spindle. Snap-fit ​​grooves are provided on both sides of the A-spindle sleeve. The connecting shaft is provided with a snap-fit ​​part, which snaps into the snap-fit ​​groove on the same side. A space is left between the connecting shaft and the housing for the snap-fit ​​part to be pulled out of the snap-fit ​​groove.

[0026] By adopting the above technical solution, during installation, the connecting shaft is first inserted into the housing for pre-positioning. Then, the connecting shafts on both sides are pulled to move them away from each other so that the A spindle sleeve can be inserted between the two connecting shafts. Then, the two connecting shafts are pushed closer together so that the snap-fit ​​part is inserted into the snap-fit ​​groove to complete the connection between the connecting shaft and the A spindle sleeve. When disassembling the A spindle sleeve, simply pull the two connecting shafts away from each other to remove the A spindle sleeve from between the two connecting shafts, thus facilitating the installation and removal of the A spindle sleeve and the spindle body.

[0027] Optionally, the connecting shaft has a threaded hole on the side facing the main sleeve, the main sleeve A has a movable groove, the movable groove communicates with the threaded hole and extends out from the end face of the main sleeve, a rotating sleeve is slidably disposed in the movable groove, the inner wall of the rotating sleeve has a sliding groove, a fixing bolt is disposed in the rotating sleeve, a sliding key is disposed on the fixing bolt, and the sliding groove is located in the sliding groove;

[0028] A push block is slidably disposed in the movable groove. A rotating sleeve is connected to a rotating shaft. The rotating shaft is inserted into the push block. A worm wheel is disposed on the rotating shaft. The worm wheel is located inside the push block. A worm is rotatably connected inside the push block. The worm meshes with the worm wheel. The worm extends from the end face of the A main shaft sleeve. The push block and the rotating sleeve can slide in the sliding groove.

[0029] By adopting the above technical solution, the push block is pushed back, which drives the rotating sleeve to move. The rotating sleeve drives the end of the fixing bolt to be inserted into the threaded hole. The worm gear is rotated, which drives the worm wheel to rotate. The worm wheel drives the rotating shaft and the rotating sleeve to rotate. The rotating sleeve drives the fixing bolt to rotate, and the fixing bolt slides against the rotating sleeve. The fixing bolt extends into the threaded hole, thereby completing the fixing of the A main shaft sleeve and the connecting shaft. This allows the connection operation between the A main shaft sleeve and the connecting shaft to be performed directly on the top and bottom surfaces of the A main shaft sleeve, which is convenient for installation and fixing, and further strengthens the connection between the connecting shaft and the A main shaft sleeve.

[0030] Optionally, a first positioning hole is provided on the top surface of the A main spindle sleeve, and a second positioning hole is provided on the side of the housing facing the A main spindle sleeve. A first positioning rod is inserted into the first positioning hole, and a second positioning rod is inserted into the second positioning hole. The first positioning rod is threadedly connected to a first rotating sleeve, and the second positioning rod is threadedly connected to a second rotating sleeve. The first rotating sleeve and the second rotating sleeve are rotatably connected to a connecting rod. The first positioning rod passes through the first rotating sleeve and is slidably connected to the connecting rod, and the second positioning rod passes through the second rotating sleeve and is slidably connected to the connecting rod.

[0031] By adopting the above technical solution, the first rotating sleeve is aligned with the first positioning hole, and then the first rotating sleeve is rotated so that one end of the first positioning rod extends out of the first rotating sleeve and is inserted into the first positioning hole. Then the second rotating sleeve is aligned with the second positioning hole, and the second rotating sleeve is rotated so that one end of the second positioning rod extends out of the second rotating sleeve and is inserted into the second positioning hole, thereby positioning the A main shaft sleeve and enabling the fixing bolt to be aligned with the threaded hole and smoothly inserted.

[0032] In summary, this application includes at least one of the following beneficial technical effects:

[0033] 1. The transmission ratio is adjusted by the cooperation of the first driving gear and the first driven gear, so that the first servo motor can provide the same torque to the connecting shaft for normal workpiece processing, just like the torque motor;

[0034] When machining workpieces with greater rigidity, the speed of the first servo motor can be adjusted. Therefore, by reducing the speed of the first servo motor, the first driven gear can provide greater torque to the connecting shaft, thereby enabling the five-axis head to machine workpieces with different rigidities and improving the adaptability of the five-axis head.

[0035] 2. By utilizing the principle of dual-motor backlash elimination, the motion gap between the first driven gear and the second driving gear is eliminated, thereby improving the response speed and rotation accuracy of the rotating shaft. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application.

[0037] Figure 2 This is a schematic diagram of the structure of the connecting shaft and the C-spindle body in Embodiment 1 of this application.

[0038] Figure 3 yes Figure 2 An enlarged schematic diagram of part A in the middle.

[0039] Figure 4 yes Figure 2 Enlarged schematic diagram of part B.

[0040] Figure 5 This is a schematic diagram of the overall structure of Embodiment 2 of this application.

[0041] Figure 6 yes Figure 5 An enlarged schematic diagram of section C.

[0042] Explanation of reference numerals in the attached drawings: 1. Housing; 11. Mounting slot; 12. Connection port; 13. First servo motor; 14. First drive gear; 15. Idler gear; 16. A-axis reading head bracket; 17. A-axis encoder; 2. Connecting shaft; 21. First combined thrust bearing; 22. First driven gear; 23. First sealing ring; 24. Snap-fit ​​part; 25. Threaded hole; 26. Second positioning hole; 3. A-spindle assembly; 31. Spindle body; 32. A-spindle sleeve; 321. Snap-fit ​​groove; 322. Movable groove; 323. First positioning hole; 33. Top cover; 4. C-spindle body; 41. Second combined... Thrust bearing; 5. C-axis spindle mounting housing; 51. Sealing gasket; 52. Second sealing ring; 53. Sealing groove; 54. C-axis reading head bracket; 55. C-axis encoder; 56. Conduit; 6. Drive assembly; 61. Second servo motor; 62. Second driving gear; 63. Second driven gear; 7. Moving space; 8. Rotating sleeve; 81. Sliding groove; 82. Fixing bolt; 83. Sliding key; 84. Push block; 85. Rotating shaft; 86. Worm gear; 87. Worm; 9. Connecting rod; 91. First rotating sleeve; 92. Second rotating sleeve; 93. First positioning rod; 94. Second positioning rod. Detailed Implementation

[0043] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0044] Example 1

[0045] Embodiment 1 of this application discloses a high-torque, high-rigidity five-axis head.

[0046] like Figure 1 and Figure 2 The high-torque, high-rigidity five-axis head includes a housing 1. The longitudinal section of the housing 1 is U-shaped. Two mounting slots 11 are opened inside the housing 1. Both mounting slots 11 are located on the top of the housing 1. A connection port 12 communicating with the two mounting slots 11 is opened on the top surface of the housing 1. A first servo motor 13 is installed in each of the two mounting slots 11. The drive shafts of the two first servo motors 13 are each facing one side of the housing 1.

[0047] The first servo motor 13 is connected to the first drive gear 14. Idler gears 15 are rotatably connected to both sides of the housing 1. The first drive gear 14 and the idler gears 15 mesh. Connecting shafts 2 are inserted into both sides of the housing 1. A first combined thrust bearing 21 is installed on the connecting shaft 2. The first combined thrust bearing 21 is bolted to the housing 1. A first driven gear 22 is bolted to the ends of the two connecting shafts 2 that are far apart from each other. The first driven gear 22 is coaxial with the connecting shaft 2 and meshes with the idler gear 15.

[0048] like Figure 3 The two first connecting shafts 2 are connected to the A main shaft assembly 3 on opposite sides, and the A main shaft assembly 3 is located in the recess of the housing 1. The two first connecting shafts 2 are each fitted with a first sealing ring 23 on opposite sides, and the first sealing ring 23 fits snugly against the housing 1.

[0049] like Figure 1 A-axis reading head bracket 16 is bolted to one side of housing 1. An A-axis encoder 17 for measuring the rotation angle of connecting shaft 2 is mounted on the A-axis reading head bracket 16. The A-axis encoder 17 is located directly below the connecting shaft 2.

[0050] like Figure 2 and Figure 4 The top surface of housing 1 is bolted to a C-spindle body 4. The C-spindle body 4 is fitted with and bolted to a second combined thrust bearing 41. The second combined thrust bearing 41 is bolted to a C-spindle mounting shell 5. The C-spindle mounting shell 5 is connected to the machine tool. The top surface of housing 1 is bolted to a sealing gasket 51. The sealing gasket 51 is fitted with a second sealing ring 52. The C-spindle mounting shell 5 has a sealing groove 53. The second sealing ring 52 is located in the sealing groove 53 and fits against the sealing gasket 51. The sealing gasket 51 fits against the inner wall of the C-spindle mounting shell 5.

[0051] The C-spindle mounting housing 5 is equipped with a drive assembly 6 for rotating the C-spindle body 4. A C-axis reading head bracket 54 is bolted inside the C-spindle mounting housing 5. A C-axis encoder 55 for measuring the rotation angle of the C-spindle body 4 is mounted on the C-axis reading head bracket 54. The C-axis encoder 55 is located inside the C-spindle body 4.

[0052] The C-spindle body 4 is a hollow shaft and is connected to the connection port 12. The C-spindle body 4 is rotatably connected to the cable tube 56, which is coaxial with the C-spindle body 4 and connected to the C-axis.

[0053] During processing, the first servo motor 13 drives the first drive gear 14 to rotate, which in turn drives the idler gear 15 and the first driven gear 22 to rotate. The first driven gear 22 drives the connecting shaft 2 to rotate, thereby enabling the A spindle assembly 3 to rotate around the X-axis. The drive assembly 6 drives the C spindle body 4 to rotate, which in turn drives the housing 1 to rotate, thereby enabling the A spindle assembly 3 to rotate around the Z-axis. The A-axis encoder 17 can accurately read the rotation angle of the connecting shaft 2, and the C-axis encoder 55 can accurately read the rotation angle of the C spindle body 4, thus improving the control of the rotation angle of the A spindle assembly 3.

[0054] The transmission ratio is adjusted by the cooperation of the first driving gear 14 and the first driven gear 22, so that the first servo motor 13 can provide the same torque to the connecting shaft 2 for normal workpiece processing, just like the torque motor.

[0055] By utilizing the principle of multi-gear sets and dual-motor backlash elimination, and driving according to the dual-motor backlash elimination control curve, there will never be a situation where the output torque of the two first servo motors 13 is zero at the same time. That is, at any time, at least one of the two first servo motors 13 will apply a non-zero torque to the corresponding first driving gear 14, eliminating the movement gap between the first driven gear 22 and the first driving gear 14, thereby improving the response speed and rotation accuracy of the connecting shaft 2.

[0056] When it is necessary to process workpieces with greater rigidity, since the speed of the first servo motor 13 can be adjusted, by reducing the speed of the first servo motor 13, the first driven gear 22 can provide greater torque to the connecting shaft 2, thereby enabling the five-axis head to process workpieces with different rigidities and improving the adaptability of the five-axis head.

[0057] Furthermore, the arrangement of the idler gear 15 can appropriately reduce the size of the first driving gear 14. Compared to directly meshing the first driving gear 14 with the first driven gear 22, the combination of the first driving gear 14 and the idler gear 15 helps to reduce the space occupied by the housing 1.

[0058] Meanwhile, the first servo motor 13 is located in the mounting slot 11, which reduces the space occupied by the first servo motor 13 and helps to further reduce the size of the housing 1, thereby reducing the space occupied by the housing 1 on the machine tool.

[0059] The wiring can pass through the C-spindle body 4 and the connector 12 in sequence via the conduit 56 and connect to the first servo motor 13, reducing the exposure of the wiring and improving the protection of the wiring.

[0060] like Figure 2 and Figure 4The drive assembly 6 includes two second servo motors 61. The two second servo motors 61 are bolted to the C-spindle mounting housing 5. Both second servo motors 61 are connected to a second drive gear 62. The two second servo motors 61 are symmetrically arranged about the central axis of the C-spindle body 4. A second driven gear 63 is bolted to the top surface of the C-spindle body 4. The second driven gear 63 is an internal gear. Both second drive gears 62 are located inside the second driven gear 63 and mesh with the second driven gear 63.

[0061] Similarly, the transmission ratio is adjusted by the cooperation of the second driving gear 62 and the second driven gear 63, so that the second servo motor 61 can provide the same torque to the C spindle body 4 for normal workpiece processing, just like the torque motor.

[0062] When machining workpieces with greater rigidity, the speed of the second servo motor 61 can be adjusted. Therefore, by reducing the speed of the second servo motor 61, the second driven gear 63 can provide greater torque to the C spindle body 4, thus improving the adaptability of the five-axis head.

[0063] By utilizing the principle of dual-motor backlash elimination and driving according to the dual-motor backlash elimination control curve, the output torque of the two second servo motors 61 will never be zero at the same time. That is, at any time, at least one of the two second servo motors 61 will apply a non-zero torque to the corresponding second driving gear 62, eliminating the movement backlash between the second driving gear 62 and the second driven gear 63, and improving the response speed and rotation accuracy of the C spindle body 4.

[0064] Furthermore, the internal gear configuration can reduce the space occupied by the second drive gear 62, thereby appropriately reducing the size of the C spindle mounting housing 5 and reducing the space occupied by the C spindle mounting housing 5 on the machine tool.

[0065] like Figure 2 and Figure 3 The A spindle assembly 3 includes a spindle body 31 and an A spindle sleeve 32. The A spindle sleeve 32 is sleeved on the A spindle and the two are fixed by bolts. The top end of the A spindle sleeve 32 is bolted to a top cover 33. The connection end of the spindle body 31 and the milling cutter extends from the bottom end of the A spindle sleeve 32, and the other end of the spindle body 31 extends from the top end of the A spindle sleeve 32 and is located inside the top cover 33.

[0066] Both sides of the main spindle sleeve 32 are provided with snap-fit ​​grooves 321. The snap-fit ​​grooves 321 are circular grooves. The opposite ends of the two connecting shafts 2 are integrally formed with snap-fit ​​parts 24. The snap-fit ​​parts 24 are annular blocks. The snap-fit ​​parts 24 are adapted to the snap-fit ​​grooves 321. The snap-fit ​​parts 24 are snapped into the snap-fit ​​grooves 321 on the same side. There is a space 7 between the connecting shafts 2 and the housing 1 for the snap-fit ​​parts 24 to be pulled out of the snap-fit ​​grooves 321.

[0067] During installation, the first combined thrust bearing 21 is first installed on the connecting shaft 2. Then, the first combined thrust bearing 21 and the connecting shaft 2 are installed together into the housing 1 for pre-positioning. When installing the A main shaft sleeve 32, since there is a moving space 7 between the connecting shaft 2 and the housing 1 for the connecting shaft 2 to move laterally along the C axis, the two connecting shafts 2 can be pulled to move away from each other so that the A main shaft sleeve 32 can be inserted between the two connecting shafts 2. Then, the two connecting shafts 2 are pushed closer to each other so that the snap-fit ​​part 24 is inserted into the snap-fit ​​groove 321 to complete the connection between the connecting shaft 2 and the A main shaft sleeve 32. When disassembling the A main shaft sleeve 32, the two connecting shafts 2 can be pulled away from each other to remove the A main shaft sleeve 32 from between the two connecting shafts 2, thus facilitating the installation and removal of the A main shaft sleeve 32 and the main shaft body 31.

[0068] The implementation principle of this application embodiment is as follows: the transmission ratio is adjusted by the cooperation of the first driving gear 14 and the first driven gear 22, so that the first servo motor 13 can provide the same torque to the connecting shaft 2 for normal workpiece processing, just like the torque motor.

[0069] When it is necessary to process workpieces with greater rigidity, since the speed of the first servo motor 13 can be adjusted, by reducing the speed of the first servo motor 13, the first driven gear 22 can provide greater torque to the connecting shaft 2, thereby enabling the five-axis head to process workpieces with different rigidities and improving the adaptability of the five-axis head.

[0070] Example 2

[0071] Reference Figure 5 and Figure 6 The difference between this embodiment and embodiment 1 is that the connecting shaft 2 has a threaded hole 25 on its circumference along the side facing the A main shaft sleeve 32. The A main shaft sleeve 32 has a movable groove 322 corresponding to the threaded hole 25. The movable groove 322 is an L-shaped groove. The movable groove 322 communicates with the corresponding threaded hole 25 and extends out from the end face of the A main shaft sleeve 322. A rotating sleeve 8 is slidably disposed in the movable groove 322. The opening of the rotating sleeve 8 faces the threaded hole 25. A sliding groove 81 is provided on the inner wall of the rotating sleeve 8 along its length direction. A fixing bolt 82 is inserted in the rotating sleeve 8. A sliding key 83 is fixed on the fixing bolt 82. The sliding key 83 is located in the sliding groove 81.

[0072] A push block 84 is slidably disposed in the movable groove 322. A rotating sleeve 8 is connected to a rotating shaft 85. The rotating shaft 85 is inserted into the push block 84. The longitudinal sections of the rotating sleeve 8 and the push block 84 are spliced ​​together to form an L-shape. A worm gear 86 is coaxially mounted on the rotating shaft 85. The worm gear 86 is located inside the push block 84. A worm 87 is rotatably connected inside the push block 84. The worm 87 meshes with the worm gear 86. The worm 87 extends out from the end face of the push block 84. A groove is opened on the end face of the worm 87 extending out of the push block 84 to facilitate the rotation of the worm 87. The push block 84 and the rotating sleeve 8 can slide in the sliding groove 81.

[0073] Two first positioning holes 323 are provided on the top surface of the main spindle sleeve 32. Two second positioning holes 26 are provided on the side of the two connecting shafts 2 facing the main spindle sleeve 32. A first positioning rod 93 is inserted into the first positioning hole 323, and a second positioning rod 94 is inserted into the second positioning hole 26. The first positioning rod 93 is threaded to a first rotating sleeve 91, and the second positioning rod 94 is threaded to a second rotating sleeve 92. The first rotating sleeve 91 and the second rotating sleeve 92 are rotatably connected to a connecting rod 9. The connecting rod 9 is an L-shaped rod. The first positioning rod 93 passes through the first rotating sleeve 91 and is inserted into the connecting rod 9. The second positioning rod 94 passes through the second rotating sleeve 92 and is inserted into the connecting rod 9.

[0074] After the two snap-fit ​​parts 24 are snapped into the corresponding snap-fit ​​grooves 321, the first rotating sleeve 91 is aligned with the first positioning hole 323. Then, the first rotating sleeve 91 is rotated so that one end of the first positioning rod 93 extends out of the first rotating sleeve 91 and is inserted into the first positioning hole 323. Next, the connecting shaft 2 is adjusted so that the second rotating sleeve 92 is aligned with the second positioning hole 26. The second rotating sleeve 92 is rotated so that one end of the second positioning rod 94 extends out of the second rotating sleeve 92 and is inserted into the second positioning hole 26, thereby achieving the positioning of the A main shaft sleeve 32 and enabling each fixing bolt 82 to be aligned with the corresponding threaded hole 25.

[0075] Then push the push block 84, which drives the rotating sleeve 8 to move. The rotating sleeve 8 drives the end of the fixing bolt 82 to be inserted into the threaded hole 25. Then use a screwdriver to rotate the worm 87, which drives the worm wheel 86 to rotate. The worm wheel 86 drives the rotating shaft 85 and the rotating sleeve 8 to rotate. The rotating sleeve 8 drives the fixing bolt 82 to rotate, and the fixing bolt 82 slides in the rotating sleeve 8. The fixing bolt 82 is threadedly connected in the threaded hole 25.

[0076] Finally, rotate the first rotating sleeve 91 and the second rotating sleeve 92 again to separate the first positioning rod 93 from the first positioning hole 323 and the second positioning rod 94 from the second positioning hole 26. Take out the connecting rod 9 and install the top cover 33, thereby completing the fixation of the A main spindle sleeve 32 and the connecting shaft 2. The connection operation between the A main spindle sleeve 32 and the connecting shaft 2 can be performed directly on the top and bottom surfaces of the A main spindle sleeve 32, which is convenient for installation and fixation, and further strengthens the connection between the connecting shaft 2 and the A main spindle sleeve 32.

[0077] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A high-torque, high-rigidity five-axis head, characterized in that: The assembly includes a housing (1), with connecting shafts (2) rotatably connected to both sides of the housing (1). All the connecting shafts (2) are connected to an A-spindle assembly (3). Each connecting shaft (2) is connected to a first driven gear (22). The housing (1) contains the same number of first servo motors (13) as the connecting shafts (2). Each first servo motor (13) is connected to a first driving gear (14). The first driving gear (14) corresponds one-to-one with the first driven gear (22). The first driven gear (22) meshes with the corresponding first driving gear (14). The first servo motors (13) sequentially drive the first driving gear (14), the first driven gear (22), and the connecting shafts (2) to rotate. All the connecting shafts (2) together drive the A-spindle assembly (3) to rotate around the X-axis. A C-spindle body (4) is fixedly connected to the housing (1), and a C-spindle mounting shell (5) is rotatably connected to the C-spindle body (4). The C-spindle mounting shell (5) is connected to the machine tool, and a drive assembly (6) for driving the C-spindle body (4) to rotate is provided on the C-spindle mounting shell (5). The A spindle assembly (3) includes a spindle body (31) and an A spindle sleeve (32). The A spindle sleeve (32) is sleeved on the spindle body (31) and fixed thereto. The A spindle sleeve (32) has snap-fit ​​grooves (321) on both sides. The connecting shaft (2) is provided with a snap-fit ​​part (24). The snap-fit ​​part (24) snaps into the snap-fit ​​groove (321) on the same side. There is a moving space (7) between the connecting shaft (2) and the housing (1) for the snap-fit ​​part (24) to be pulled out of the snap-fit ​​groove (321). The connecting shaft (2) has a threaded hole (25) on the side facing the A main shaft sleeve (32). The A main shaft sleeve (32) has a movable groove (322). The movable groove (322) communicates with the threaded hole (25) and extends out from the end face of the A main shaft sleeve (32). A rotating sleeve (8) is slidably arranged in the movable groove (322). A sliding groove (81) is opened on the inner wall of the rotating sleeve (8). A fixing bolt (82) is arranged in the rotating sleeve (8). A sliding key (83) is arranged on the fixing bolt (82). The sliding key (83) is located in the sliding groove (81). A push block (84) is slidably disposed in the movable groove (322). A rotating sleeve (8) is connected to a rotating shaft (85). The rotating shaft (85) is inserted into the push block (84). A worm gear (86) is disposed on the rotating shaft (85). The worm gear (86) is located in the push block (84). A worm (87) is rotatably connected in the push block (84). The worm (87) meshes with the worm gear (86). The worm (87) extends out from the end face of the A main shaft sleeve (32). The push block (84) and the rotating sleeve (8) can slide in the sliding groove (81). The top surface of the A main shaft sleeve (32) is provided with a first positioning hole (323), and the housing (1) is provided with a second positioning hole (26) on the side facing the A main shaft sleeve (32). A first positioning rod (93) is inserted into the first positioning hole (323), and a second positioning rod (94) is inserted into the second positioning hole (26). The first positioning rod (93) is threadedly connected to a first rotating sleeve (91), and the second positioning rod (94) is threadedly connected to a second rotating sleeve (92). The first rotating sleeve (91) and the second rotating sleeve (92) are rotatably connected to a connecting rod (9). The first positioning rod (93) passes through the first rotating sleeve (91) and is slidably connected to the connecting rod (9). The second positioning rod (94) passes through the second rotating sleeve (92) and is slidably connected to the connecting rod (9).

2. The high-torque, high-rigidity five-axis head according to claim 1, characterized in that: Idler wheels (15) are rotatably connected to both sides of the housing (1). The idler wheel (15) located on the same side of the housing (1) meshes with the first driven gear (22) and the first driving gear (14). The idler wheel (15) is located between the first driven gear (22) and the first driving gear (14).

3. The high-torque, high-rigidity five-axis head according to claim 1, characterized in that: The drive assembly (6) includes a second servo motor (61), which is mounted on the C-spindle mounting housing (5). The second servo motor (61) is connected to a second drive gear (62), and the C-spindle body (4) is connected to a second driven gear (63). The second drive gear (62) meshes with the second driven gear (63).

4. The high-torque, high-rigidity five-axis head according to claim 3, characterized in that: Two second servo motors (61) are mounted on the C spindle mounting housing (5). Both second servo motors (61) are connected to the second drive gear (62), and the two second drive gears (62) mesh with the second driven gear (63) at the same time.

5. The high-torque, high-rigidity five-axis head according to any one of claims 3 or 4, characterized in that: The second driven gear (63) is an internal gear, and the second driving gear (62) is located inside the second driven gear (63).

6. The high-torque, high-rigidity five-axis head according to claim 1, characterized in that: An A-axis reading head bracket (16) is installed on one side of the housing (1), and an A-axis encoder (17) for measuring the rotation angle of the connecting shaft (2) is installed on the A-axis reading head bracket (16). A C-axis reading head bracket (54) is installed on the C-axis main shaft mounting housing (5), and a C-axis encoder (55) for measuring the rotation angle of the C-axis main shaft body (4) is installed on the C-axis reading head bracket (54).

7. The high-torque, high-rigidity five-axis head according to claim 1, characterized in that: The C-spindle body (4) is a hollow shaft. The C-spindle body (4) is rotatably equipped with a cable guide tube (56). The cable guide tube (56) is coaxial with the C-spindle body (4). The housing (1) has an installation groove (11). The first servo motor (13) is fixed in the installation groove (11). The housing (1) has a connection port (12) that communicates with the installation groove (11). The connection port (12) communicates with the C-spindle body (4).

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