A spindle system and a vertical gear machine tool

Abstract

The present application relates to a kind of main shaft system and vertical gear machine tool, and main shaft system includes column and is installed in the vertical main shaft integrated device of column;Vertical main shaft integrated device includes lifting carrier, main shaft assembly, main shaft drive unit and auxiliary function unit, lifting carrier includes the upper containing space defined by horizontal extension platform, back expansion plate and the side plate located in two sides;The center of horizontal extension platform is provided with the main shaft installation portion that suspends downwards, main shaft assembly is installed in main shaft installation portion, main shaft drive unit, auxiliary function unit are located in upper containing space, and are staggered arrangement in the side of main shaft installation portion;Along X axis direction, lifting carrier is divided into left side area and right side area with main shaft installation portion as weight symmetry center, and the weight of left side area and right side area is balanced.The main shaft system of the application is convenient to maintain, and weight distribution is balanced, and it is convenient to improve the dynamic performance of abrasive wheel or tool movement.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of machine tools, in particular to a spindle system of a machine tool. BACKGROUND

[0002] The vertical machine tool mainly refers to the tool spindle or the grinding wheel spindle of the machine tool arranged in the vertical direction. The vertical layout of the spindle has the advantage that the spindle is less affected by gravity in the radial direction.

[0003] For example, the vibration of the grinding wheel is mainly related to the unbalance of the rotating part of the spindle, mainly in the radial direction, and the unbalance calculation formula U = m x r, where m is the unbalance mass and r is the gravity center radius of the unbalance mass. The force generated by the unbalance acts together with the gravity of the spindle, which is easy to cause resonance of the spindle, so the vertical machine tool has a unique advantage in reducing vibration of the machine tool.

[0004] However, for machine tools with more functional accessories, such as a gear machining machine tool with application number 2021220034970, the spindle has a spindle drive unit and an auxiliary functional unit installed on the outer periphery of the spindle. These units are arranged in an additional form on the outer periphery of the spindle and are separated from the spindle by a partition plate. The layout of the spindle system is difficult to install and maintain, and the weight of the spindle system is not reasonably distributed, which affects the lifting accuracy and horizontal accuracy of the spindle, and increases the unbalance of the rotating part of the spindle, thereby affecting the dynamic performance of the grinding wheel or tool movement, making it difficult for the machine tool to meet the use requirements of high machining precision and machining efficiency. SUMMARY

[0005] The purpose of the present application is to provide a spindle system to solve the above technical problems.

[0006] Another purpose of the present application is to provide a vertical gear machine tool provided with the spindle system.

[0007] To achieve the above purpose, the present application provides a spindle system, comprising:

[0008] A column;

[0009] A lifting carrier seat comprising a horizontally extended platform and a back expansion plate; the back expansion plate is installed on the column through a Z-axis guide rail to realize the lifting of the lifting carrier seat along the Z-axis; the horizontally extended platform is perpendicular to the back expansion plate and constitutes an upper accommodation space; the center position of the horizontally extended platform is provided with a downwardly overhanging spindle mounting portion;

[0010] A spindle assembly installed on the spindle mounting portion, the power input end of the spindle assembly extending into the upper accommodation space;

[0011] A main shaft driving unit is located in the upper accommodation space and arranged beside the power input end, and the main shaft driving unit is connected to the power input end through a transmission mechanism;

[0012] An auxiliary function unit is partially located in the upper accommodation space and arranged beside the power input end, and the auxiliary function unit has a component passing through a hole of a horizontal extension platform;

[0013] In the Y-axis direction, the lifting carrier is divided into a left side area and a right side area with the main shaft mounting portion as the weight symmetry center, and the left side area and the right side area are balanced in weight.

[0014] Optionally, the main shaft driving unit is installed in the left side area, and the main shaft driving unit includes a main shaft motor and an eccentric main shaft motor, and the main shaft motor and the eccentric main shaft motor are arranged in the Y-axis direction.

[0015] The auxiliary function unit is installed in the right side area, and the auxiliary function unit includes a cooling nozzle servo unit and an online measurement unit, and the cooling nozzle servo unit and the online measurement unit are arranged in the Y-axis direction.

[0016] Optionally, in the X-axis direction, the lifting carrier is divided into an inner side area and an outer side area with the main shaft mounting portion as the weight symmetry center.

[0017] The weight of the main shaft motor is greater than the weight of the eccentric main shaft motor, the main shaft motor is installed in the inner side area, and the eccentric main shaft motor is installed in the outer side area.

[0018] The weight of the cooling nozzle servo unit is greater than the weight of the online measurement unit, the online measurement unit is installed in the inner side area, and the cooling nozzle servo unit is installed in the outer side area.

[0019] Optionally, in the X-axis direction, the lifting carrier is divided into an inner side area and an outer side area with the main shaft mounting portion as the weight symmetry center.

[0020] The main shaft driving unit is installed in the inner side area, and the main shaft driving unit includes a main shaft motor and an eccentric main shaft motor, and the weight of the main shaft motor is greater than the weight of the eccentric main shaft motor, the main shaft motor is installed in the left side area, and the eccentric main shaft motor is installed in the right side area.

[0021] The auxiliary function unit is installed on the outer side area, the auxiliary function unit comprises a cooling nozzle servo unit and an online measurement unit, the weight of the cooling nozzle servo unit is greater than the weight of the online measurement unit, the online measurement unit is installed on the left side area, and the cooling nozzle servo unit is installed on the right side area.

[0022] Optionally, the lifting carrier seat further comprises a first side plate and a second side plate, the first side plate is arranged on the left side area, the second side plate is arranged on the right side area, and the horizontal extension platform, the back expansion plate, the first side plate and the second side plate jointly form the upper containing space.

[0023] The horizontal extension platform, the back expansion plate, the first side plate, the second side plate and the main shaft mounting portion are connected as an integrated structure.

[0024] Optionally, the horizontal extension platform, the back expansion plate, the side plate and the main shaft mounting portion are an integrally formed casting.

[0025] Optionally, from top to bottom along the Z-axis direction, the widths of the first side plate and the second side plate in the Y-axis direction gradually increase, and the middle portions of the first side plate and the second side plate are each provided with a weight-reducing hole.

[0026] Optionally, the back expansion plate is provided with a longitudinal main rib plate, the main rib plate is arranged on the right side area, and the auxiliary function unit comprises an online measurement unit, the online measurement unit is arranged between the main rib plate and the second side plate.

[0027] The back expansion plate is further provided with crosswise arranged secondary rib plates, and the secondary rib plates are arranged between the main rib plate and the first side plate.

[0028] The height of the main rib plate is greater than that of the secondary rib plate.

[0029] Optionally, the Z-axis guide rail comprises a first Z-axis guide rail and a second Z-axis guide rail which are parallel to each other, and in the X direction, the first Z-axis guide rail is located on the inner side of the first side plate, and the second Z-axis guide rail is located on the inner side of the second side plate.

[0030] Optionally, the width of the horizontal extension platform and the back expansion plate is 700mm to 1200mm, and the distance between the first Z-axis guide rail and the first side plate and the distance between the second Z-axis guide rail and the second side plate are each less than or equal to 150mm.

[0031] Optionally, the lifting carrier seat further comprises a thickened portion, the thickened portion is connected to the main shaft mounting portion as an integrated structure and is arranged on one side of the horizontal extension platform close to the stand column.

[0032] The distance L1 between the lower surface of the horizontal extension platform and the lower end surface of the main shaft mounting portion is greater than the distance L2 between the lower surface of the thickened portion and the lower end surface of the main shaft mounting portion.

[0033] Optionally, the outer diameter of the main shaft mounting portion decreases in sequence from top to bottom along the Z-axis direction.

[0034] The main shaft assembly includes a main body portion and an annular flange, the main body portion is located between the power input end and the annular flange, the main body portion is arranged in the main shaft mounting portion, and the annular flange abuts against the lower end surface of the main shaft mounting portion.

[0035] Optionally, a first sealing ring is arranged between the main body portion of the main shaft assembly and the inner wall of the upper end port of the cavity, and a second sealing ring is arranged between the main body portion of the main shaft assembly and the inner wall of the lower end port of the cavity.

[0036] Optionally, the main body portion of the main shaft assembly has a reduced diameter section with a diameter smaller than that of the two ends, the outer peripheral surface of the reduced diameter section is provided with a spiral protrusion, the spiral protrusion and the inner wall of the cavity form a spiral liquid cooling groove, one end of the spiral liquid cooling groove is in communication with the liquid inlet port, and the other end is in communication with the liquid outlet port.

[0037] Optionally, the main shaft driving unit includes a main shaft motor, the main shaft motor is arranged at a position deviating from one side of the axis of the main shaft assembly, and is in transmission connection with the rotary power input end of the main shaft assembly through a first transmission mechanism; and the part of the auxiliary function unit located in the upper accommodation space is arranged at a position deviating from the other side of the axis of the main shaft assembly.

[0038] Optionally, the main shaft motor is vertically arranged, the power output end of the main shaft motor faces the horizontal extension platform and is in transmission connection with the rotary power input end of the main shaft assembly through a main shaft transmission belt mechanism, so as to drive the main shaft to rotate.

[0039] Optionally, the main shaft assembly includes an eccentric main shaft, and the main shaft driving unit includes an eccentric main shaft motor; the eccentric main shaft motor is arranged beside the power input end in a staggered manner and is in transmission connection with the eccentric power input end of the eccentric main shaft through a second transmission mechanism, the position of the eccentric power input end of the eccentric main shaft is higher than the horizontal extension platform and lower than the rotary power input end.

[0040] Optionally, the eccentric main shaft motor is vertically arranged, the power output end of the eccentric main shaft motor faces the horizontal extension platform and is in transmission connection with the eccentric power input end of the eccentric main shaft through an eccentric main shaft transmission belt mechanism, so as to drive the eccentric main shaft to rotate.

[0041] Optionally, the eccentric spindle motor is located at the side where the spindle motor is located inside the upper accommodation space, or the eccentric spindle motor is located at the side where the auxiliary functional unit is located inside the upper accommodation space.

[0042] Optionally, the auxiliary functional unit comprises a cooling nozzle follow-up unit and / or an online measurement unit.

[0043] Optionally, the cooling nozzle follow-up unit comprises a cooling nozzle follow-up motor and a cooling nozzle, the cooling nozzle is located below the horizontal extension platform, the cooling nozzle follow-up motor is in driving connection with the cooling nozzle through a screw rod transmission mechanism, so as to adjust the up-down position of the cooling nozzle according to the axial size of the grinding wheel or the tool; the cooling nozzle is provided with a lifting connecting rod, and the horizontal extension platform is provided with a first hole position through which the lifting connecting rod passes.

[0044] Optionally, the auxiliary functional unit comprises an online measurement unit; the online measurement unit comprises an online measurement driving cylinder and a detection mechanism, the online measurement driving cylinder is used to drive the detection mechanism to extend, so as to complete the online measurement of the workpiece, and is used to drive the detection mechanism to retract after the measurement is completed, and the horizontal extension platform is provided with a second hole position through which the online measurement unit passes when extending and retracting.

[0045] In order to achieve the above-mentioned another object, the application provides a vertical gear machine tool, comprising a spindle system provided with a grinding wheel or a tool, and the spindle system is the spindle system in any one of the above-mentioned embodiments.

[0046] The spindle system provided by the application designs a brand-new lifting bearing seat, which mainly comprises a horizontal extension platform, a back expansion plate, a spindle mounting portion suspended downward from the lower surface of the horizontal extension platform and the like, the whole lifting bearing seat is divided into two parts, i.e., an upper installation area and a lower installation area, by the horizontal extension platform, wherein the spindle assembly is installed in the lower cavity formed by the spindle mounting portion, and the spindle driving unit and the auxiliary functional unit are installed in the upper accommodation space formed by the horizontal extension platform and the back expansion plate.

[0047] Due to the partitioned installation, the upper and lower installation areas are relatively independent, the horizontal extension platform of the upper installation area can be further extended and expanded in the X direction and the Y direction, so as to have a large enough area, and space for installing the spindle drive unit and other important auxiliary functional units can be left, so as to facilitate the connection and maintenance of the spindle drive unit and the spindle assembly, and the installation and maintenance of the auxiliary functional units; moreover, the power input end of the spindle drive unit and the spindle assembly is arranged in a staggered manner, which effectively solves the problem of reasonable layout of the whole machine functional components, reasonably distributes the weight of each unit, increases the spindle stiffness, reduces the manufacturing difficulty of the spindle, improves the lifting precision and horizontal precision of the spindle, reduces the unbalance of the rotating part of the spindle, improves the dynamic performance of the movement of the grinding wheel or the tool, and improves the machining precision and machining efficiency.

[0048] The vertical gear machine tool provided by the application is provided with the spindle system, and due to the technical effects of the spindle system, the vertical gear machine tool provided with the spindle system also has corresponding technical effects. BRIEF DESCRIPTION OF DRAWINGS

[0049] The application will be further described below in combination with the drawings and embodiments, in which:

[0050] Figure 1 A structural schematic diagram of the spindle system provided for the first embodiment of the application is shown in the figure.

[0051] Figure 2 A perspective view of the vertical spindle integrated device shown in the figure. Figure 1

[0052] A perspective view of the vertical spindle integrated device shown in the figure from another angle. Figure 3 Figure 1 A perspective view of the vertical spindle integrated device shown in the figure.

[0053] Figure 4 A perspective view of the vertical spindle integrated device shown in the figure. Figure 2

[0054] Figure 5 A plan view of the vertical spindle integrated device shown in the figure. Figure 2

[0055] A comparison schematic diagram of the horizontal extension platform width of the spindle motor arranged in a staggered manner compared with the coaxial arrangement. Figure 6 LIST OF REFERENCE NUMBERS

[0056]

[0057] ​​​10. bed body; 20. slide table; 30. column; 40. vertical spindle integrated device; 50. X-axis guide rail; 60. Y-axis guide rail; 70. Z-axis guide rail; 71. first Z-axis guide rail; 72. second Z-axis guide rail; 73. Z-axis drive motor; 74. Z-axis screw; 41. lifting carrier; 411. horizontally extended platform; 412. back extension plate; 4121. auxiliary rib plate; 4123. main rib plate; 413. first side plate; 414. second side plate; 415. spindle mounting portion; 416. spindle transmission belt mechanism; 4161. spindle pulley; 417. eccentric spindle transmission belt mechanism; 4171. eccentric spindle pulley; 418. first hole position; 419. second hole position; 42. spindle assembly; 421. rotary power input end; 422. eccentric power input end; 423. main body portion; 424. annular flange; 425. reduced diameter section; 426. helical protrusion; 427. helical liquid cooling groove; 428. first sealing ring; 429. second sealing ring; 43. spindle drive unit; 431. spindle motor; 432. eccentric spindle motor; 44. auxiliary function unit; 441. cooling nozzle follow-up unit; 4411. cooling nozzle follow-up motor; 4412. cooling nozzle; 4413. screw transmission mechanism; 4414. lifting rod; 4415. cooling lifting slide rail; 442. on-line measurement unit; 4421. on-line measurement drive cylinder; A. mounting guide surface; B. thickened portion; C. first step; D. second step. DETAILED DESCRIPTION

[0058] Embodiments of the present application are described in detail below with reference to the attached drawing figures, wherein the same or like reference numerals and characters throughout the figures denote the same elements or elements with the same functions. The embodiments described below are merely exemplary for the purpose of explaining present application and are not to be construed as limiting present application.

[0059] In the description of present application, it needs to be understood that the orientation description, such as the orientation or position relationship indicated by up, down, etc. is based on the orientation or position relationship shown in the drawings, which is only for the purpose of facilitating the description of present application and simplifying the description, and is not intended to indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of present application.

[0060] In the description of present application, plural means more than two. If there is a description of first, second, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0061] In the description of the present application, the words such as arrangement, installation, connection and the like should be understood in a broad sense unless otherwise explicitly limited, and the skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0062] Please refer to Figures 1 to 6 , Figure 1 The structural schematic diagram of the spindle system provided by the first aspect embodiment of the present application is shown in the figure. Figure 2 The isometric view of the vertical spindle integrated device shown in Figure 1 Figure 3 The isometric view of the vertical spindle integrated device shown in Figure 1 from another angle.

[0063] As shown in Figure 1 , in a specific embodiment, the spindle system provided by the present application mainly consists of a bed body 10, a sliding table 20, a column 30 and a vertical spindle integrated device 40.

[0064] The sliding table 20 is installed above the bed body 10 through an X-axis guide rail 50, and the sliding table 20 can move horizontally along the X direction relative to the bed body 10; the column 30 is installed above the sliding table 20 through a Y-axis guide rail 60, and the column 30 can move forward and backward along the Y direction relative to the sliding table 20; the vertical spindle integrated device 40 is installed on the front side of the column 30 through a Z-axis guide rail 70, and can move up and down along the Z-axis direction relative to the column 30.

[0065] Specifically, referring to Figure 2 , Figure 3 , the vertical spindle integrated device 40 mainly consists of a lifting carrier 41, a spindle assembly 42, a spindle driving unit 43 and an auxiliary function unit 44, wherein the lifting carrier 41 has a horizontally extended platform 411, a back expansion plate 412 and first and second side plates 413 and 414 located on both sides.

[0066] The horizontally extended platform 411 and the back expansion plate 412 are generally rectangular, and both are "L" shaped in the longitudinal section; the back surface of the back expansion plate 412 is provided with a lead screw nut and Z-axis sliders located on both sides of the lead screw nut (not shown due to obstruction), which are in sliding fit with the first and second Z-axis guide rails 71 and 72 on the column 30, and the Z-axis driving motor 73 drives the lifting carrier 41 to move up and down through the cooperation of the Z-axis lead screw 74 and the lead screw nut. In the X direction, the first Z-axis guide rail 71 is located on the inner side of the first side plate 413, and the second Z-axis guide rail 72 is located on the inner side of the second side plate 414; the Z-axis sliders are in sliding fit with the first and second Z-axis guide rails 71 and 72 on the column 30, which can improve the stability of the lifting carrier 41 moving up and down.

[0067] ​Specifically, the width of the horizontal extension platform 411 and the back expansion plate 412 is 700mm-1200mm, the first Z-axis guide rail 71 and the second Z-axis guide rail 72 are respectively close to the first side plate 413 and the second side plate 414, and the distance between the first Z-axis guide rail 71 and the first side plate 413 and the distance between the second Z-axis guide rail 72 and the second side plate 414 are both less than or equal to 150mm.

[0068] The lateral projection of the first side plate 413 and the second side plate 414 is generally a right triangle, and the width gradually increases from top to bottom, so as to reduce the gravity center and the overall weight of the lifting bearing seat 41. The first side plate 413 and the second side plate 414 are both provided with a weight-reducing hole, and the shape of the weight-reducing hole can be set according to actual conditions, for example, it can be set as a triangular shape, a rectangular shape, etc.

[0069] In the embodiment, as shown in Figure 2 , Figure 3 the horizontal extension platform 411, the back expansion plate 412, the first side plate 413 and the second side plate 414 jointly constitute an upper containing space. The lower surface of the horizontal extension platform 411 is provided with a downward overhanging main shaft mounting portion 415 at the center position, the main shaft assembly 42 is installed on the main shaft mounting portion 415, and the power input end of the main shaft assembly 42 extends into the upper containing space from the main shaft mounting portion 415. The main shaft driving unit 43 is located in the upper containing space and is arranged beside the power input end and is in transmission connection with the power input end through a transmission mechanism. The auxiliary function unit 44 is located in the upper containing space and is partially beside the power input end. The auxiliary function unit 44 has a component connected through the horizontal extension platform 411 and a part located outside the upper containing space. The horizontal extension platform 411 is provided with a hole position corresponding to the component passing through the horizontal extension platform 411.

[0070] In the embodiment, as shown in Figure 4 the main shaft assembly 42 has an eccentric main shaft, the main shaft driving unit 43 is provided with a main shaft motor 431 and an eccentric main shaft motor 432, the main shaft motor 431 is vertically fixed on the horizontal extension platform 411 through a mounting seat, the power output end of the main shaft motor 431 faces the horizontal extension platform 411 and is in transmission connection with the rotary power input end 421 of the main shaft assembly 42 through a main shaft transmission belt mechanism 416, so as to drive the main shaft to work in rotation.

[0071] The position of the eccentric power input end 422 of the eccentric main shaft is higher than the horizontal extension platform 411 and lower than the rotary power input end 421. The eccentric main shaft motor 432 is vertically fixed on the horizontal extension platform 411 through a mounting seat, the power output end of the eccentric main shaft motor 432 faces the horizontal extension platform 411 and is in transmission connection with the eccentric power input end 422 of the eccentric main shaft through an eccentric main shaft transmission belt mechanism 417, so as to drive the eccentric main shaft to work in rotation.

[0072] The main shaft transmission belt mechanism 416 has a main shaft belt pulley 4161 arranged at the main shaft assembly rotating power input end 421, and the eccentric main shaft transmission belt mechanism 417 has an eccentric main shaft belt pulley 4171 arranged at the main shaft assembly eccentric power input end 422. The main shaft belt pulley 4161 is located above the eccentric main shaft belt pulley 4171. The diameter of the eccentric main shaft belt pulley 4171 is greater than that of the main shaft belt pulley 4161, and the width of the main shaft transmission belt 4161 is greater than that of the eccentric main shaft belt pulley 4171.

[0073] The number and type of auxiliary function units 44 can be increased or decreased according to different requirements of the machine tool. In the embodiment, as shown in FIGS. 1, 2 and 3, the number of auxiliary function units 44 is two, which are a cooling nozzle follow-up unit 441 and an online measurement unit 442. The cooling nozzle follow-up unit 441 and the online measurement unit 442 are located in the part inside the upper containing space and are installed at a position deviated from the axis of the main shaft assembly 42. Figure 2 Figure 3 The number of auxiliary function units 44 can be increased or decreased according to different requirements of the machine tool. In the embodiment, as shown in FIGS. 1, 2 and 3, the number of auxiliary function units 44 is two, which are a cooling nozzle follow-up unit 441 and an online measurement unit 442. The cooling nozzle follow-up unit 441 and the online measurement unit 442 are located in the part inside the upper containing space and are installed at a position deviated from the axis of the main shaft assembly 42.

[0074] The cooling nozzle follow-up unit 441 is provided with a cooling nozzle follow-up motor 4411 and a cooling nozzle 4412. The cooling nozzle 4412 is located below the horizontal extension platform 411. The cooling nozzle follow-up motor 4411 is vertically fixed to the inner side of the second side plate 414 through a lateral mounting plate. The power output end of the cooling nozzle follow-up motor 4411 has a certain spacing with the horizontal extension platform 411. The cooling nozzle follow-up motor 4411 is in transmission connection with the lifting rod 4414 of the cooling nozzle 4412 through a screw rod transmission mechanism 4413, so as to adjust the up-down position of the cooling nozzle 4412 according to the axial size of the grinding wheel or the tool.

[0075] The inner side of the second side plate 414 is fixed with a cooling lifting slide rail 4415. The nut part of the screw rod transmission mechanism 4413 is in up-down sliding cooperation with the cooling lifting slide rail 4415. The lifting rod 4414 is fixed to one side of the nut part. The horizontal extension platform 411 is provided with a first hole position 418 through which the lifting rod 4414 passes. The lifting rod 4414 can move up and down along the first hole position 418. The inside of the lifting rod 4414 can be designed with a corresponding cooling liquid flow path, so as to supply cooling liquid to the cooling nozzle 4412.

[0076] Taking the grinding wheel as an example, during work, with the use and dressing of the grinding wheel, the size in the axial direction becomes smaller. In order to avoid interference between the cooling nozzle 4412 and the workpiece being processed, and to achieve better cooling effect, the cooling nozzle follow-up motor 4411 drives the cooling nozzle 4412 to make corresponding adjustment upwards according to the axial size of the grinding wheel through the screw rod transmission mechanism 4413.

[0077] ​The online measurement unit 442 is provided with an online measurement driving cylinder 4421 and a detection mechanism. The online measurement driving cylinder 4421 is a vertically arranged air cylinder, the piston rod of which faces upward and is fixed to the back expansion plate 412, and the piston cylinder can move up and down relative to the piston rod. The detection mechanism is installed at the lower end of the piston cylinder. The online measurement driving cylinder 4421 can drive the detection mechanism to extend out so as to complete the online measurement of the workpiece, and can drive the detection mechanism to retract after the measurement is completed. The horizontal extension platform 411 is provided with a second hole position 419 through which the online measurement driving cylinder 4421 extends and retracts.

[0078] In the embodiment, as shown in FIGS. 1, 2 and 3, the lifting carrier 41 is divided into a left side region and a right side region with the spindle mounting portion 415 as the weight symmetry center, and the weights of the left side region and the right side region are balanced. Figure 2 Figure 3 For example, if the weight of the spindle driving unit 43 is basically consistent with the weight of the auxiliary function unit 44, the spindle driving unit 43 can be arranged in the left side region and the auxiliary function unit 44 can be arranged in the right side region, or the spindle driving unit 43 can be arranged in the right side region and the auxiliary function unit 44 can be arranged in the left side region.

[0079] For example, if the spindle driving unit 43 is arranged in the left side region and the auxiliary function unit 44 is arranged in the right side region, in order to further balance the weight of the lifting carrier 41 at each position and further improve the stability of the lifting carrier 41, the spindle motor 431 and the eccentric spindle motor 432 can be arranged in the Y-axis direction with a certain interval. Similarly, the cooling nozzle servo unit 441 and the online measurement unit 442 can be arranged in the Y-axis direction with a certain interval.

[0080] Specifically, in the X-axis direction, the lifting carrier 41 is divided into an inner side region and an outer side region with the spindle mounting portion 415 as the weight symmetry center. When the weight of the spindle motor 431 is greater than the weight of the eccentric spindle motor 432, and the weight of the cooling nozzle servo unit 441 is greater than the weight of the online measurement unit 442, if the spindle motor 431 is arranged in the inner side region and the eccentric spindle motor 432 is arranged in the outer side region, the online measurement unit 442 is arranged in the inner side region and the cooling nozzle servo unit 441 is arranged in the outer side region, so as to balance the weight of the inner side region and the outer side region of the lifting carrier 41.

[0081] ​It should be noted that in a specific actual product, the weight balance of each position of the lifting bearing seat 41 is given priority as the first priority to optimize the arrangement of the main shaft driving unit 43 and the sub-units of the auxiliary function unit 44. For example, in another embodiment of the present application, when the weight of the main shaft driving unit 43 is substantially the same as that of the auxiliary function unit 44, the main shaft driving unit 43 is arranged in the inner side area, and the auxiliary function unit 44 is arranged in the outer side area, or the main shaft driving unit 43 is arranged in the outer side area, and the auxiliary function unit 44 is arranged in the inner side area.

[0082] Further, when the weight of the main shaft motor 431 is greater than that of the eccentric main shaft motor 432, and the weight of the cooling nozzle follower unit 441 is greater than that of the online measurement unit 442, if the main shaft motor 431 is installed in the left side area and the eccentric main shaft motor 432 is installed in the right side area, then the online measurement unit 442 is installed in the left side area and the cooling nozzle follower unit 441 is installed in the right side area, and vice versa, to achieve weight balance of the left side area and the right side area of the lifting bearing seat 41.

[0083] It can be understood that in other embodiments, if the volume and weight of the main shaft motor 431 are large, the layout mode of the main shaft motor 431 being arranged alone in the left side area inside the lifting bearing seat 41, and the eccentric main shaft motor 432 and the auxiliary function unit 44 being located in the right side area, or the main shaft motor 431 being located in the right side area inside the lifting bearing seat 41, and the eccentric main shaft motor 432 and the auxiliary function unit 44 being located in the left side area can be adopted.

[0084] In summary, the main shaft motor 431 and the eccentric main shaft motor 432 of the present embodiment are both installed outside the main shaft assembly 42. According to conventional cognition, the coaxial arrangement of the main shaft motor 431 and the main shaft assembly 42 will be more compact and save more space, but in the embodiments of the present application, the staggered layout mode can save more space than the coaxial arrangement. Referring to FIG. 8, if the main shaft motor 431 is coaxially arranged with the main shaft assembly 42, the installation space of the eccentric main shaft motor 432 and the auxiliary function unit 44 will be inevitably squeezed, and finally the width of the lifting bearing seat 41 is L6; on the contrary, when the main shaft motor 431 is arranged in a staggered manner with the main shaft assembly 42, the width of the lifting bearing seat 41 can be made smaller, L5, and the difference ΔL=L6-L5. Figure 6

[0085] ​In addition, the main shaft motor 431 is arranged in a staggered manner with the main shaft assembly 42, compared with the coaxial arrangement of the main shaft motor 431 and the main shaft assembly 42, the staggered arrangement can reduce the performance requirements of the main shaft motor 431 and the eccentric main shaft motor 432, thereby reducing the manufacturing cost; moreover, each component can be arranged more flexibly, so that the weight carried by the left and right side regions and the inner and outer side regions of the lifting bearing seat 41 is balanced as much as possible, thereby improving the stability of the lifting bearing seat 41 moving up and down, and while maintaining the weight balance, the structure layout is more compact, thereby controlling the width of the lifting bearing seat 41 within a reasonable range, avoiding the problem of the lifting bearing seat 41 being too wide and large due to the simultaneous arrangement of the main shaft driving unit 43 and the auxiliary function unit 44 inside the lifting bearing seat 41.

[0086] In the embodiment, as shown in Figure 2 , Figure 3 , the inner surface of the back expansion plate 412 is provided with longitudinal and transverse intersecting secondary rib plates 4121 and a longitudinal main rib plate 4123, the height of the main rib plate 4123 is greater than that of the secondary rib plate 4121, and the main rib plate 4123 is deviated from the center position of the back expansion plate 412 relative to the main shaft motor 431, for example, as shown in 2, Figure 3 , the main rib plate 4123 is arranged in the right side region. The main rib plate 4123 and the second side plate 414 form a longitudinal channel, which can be used to install the online measurement driving cylinder 4421 of the online measurement unit 442; the secondary rib plate 4121 is arranged between the main rib plate 4123 and the first side plate 413.

[0087] Compared with the arrangement of the main rib plate 4123 at the center position, the deviated main rib plate 4123 can make full use of the internal space of the lifting bearing seat 41, so that it does not interfere with the main shaft mounting portion 415; the main rib plate 4123 cooperates with the secondary rib plate 4121 to ensure the rigidity and structural strength of the lifting bearing seat 41, thereby improving the dynamic performance of the grinding wheel or tool movement; the height of the main rib plate 4123 is greater than that of the secondary rib plate 4121, which is convenient for the installation of the online measurement unit 442, and can also avoid the extrusion of the secondary rib plate 4121 with the upper accommodation space, affecting the compactness and stability of the vertical spindle integrated device 40.

[0088] In the embodiment, as shown in Figure 4 , Figure 5 , the axial cross-sectional view of the vertical spindle integrated device is shown in Figure 4 , Figure 2 . Figure 5 Figure 2 ​The vertical spindle integrated device is shown in a planar cross-sectional view. The spindle mounting portion 415 is in the shape of an inverted hollow frustum, with the outer diameter of the upper end being larger than that of the lower end. The spindle mounting portion 415 has a cavity that accommodates the main body portion 423 of the spindle assembly 42. The main body portion 423 of the spindle assembly 42 is provided with an annular flange 424 at a position close to the lower end. The spindle assembly 42 is loaded into the spindle mounting portion 415 from the bottom, and the annular flange 424 abuts against the lower end surface of the spindle mounting portion 415. For the convenience of installation, the main body portion 423 of the spindle assembly 42 is provided with a tapered mounting guide surface A at the upper end.

[0089] The axial projection area of the horizontally extended platform 411 is larger than that of the spindle mounting portion 415. The axial projection of the spindle mounting portion 415 is located inside the axial projection of the horizontally extended platform 411. The horizontally extended platform 411 has a portion that is further extended outward in the X and Y directions under the condition that the spindle mounting portion 415 is arranged, so as to obtain a larger area.

[0090] The main body portion 423 of the spindle assembly 42 has a reduced diameter section 425 with a diameter smaller than that of the two ends. The outer peripheral surface of the reduced diameter section 425 is provided with a helical protrusion 426. The helical protrusion 426 and the inner wall of the cavity form a helical liquid cooling groove 427. One end of the helical liquid cooling groove 427 is in communication with the liquid inlet port, and the other end is in communication with the liquid outlet port. When the cooling liquid enters the helical liquid cooling groove 427 from the liquid inlet port, it can flow along the helical flow channel defined by the helical liquid cooling groove 427, and complete heat exchange with the spindle assembly 42 in the process of flowing, and then flow out from the liquid outlet port, so as to achieve the purpose of cooling the spindle assembly 42.

[0091] In order to ensure the sealing performance, two first sealing rings 428 are arranged between the main body portion 423 of the spindle assembly 42 and the inner wall of the upper end of the cavity. The second sealing ring 428 is arranged in the sealing groove of the inner wall of the cavity. One second sealing ring 429 is arranged between the main body portion 423 of the spindle assembly 42 and the inner wall of the lower end of the cavity. The second sealing ring 429 is arranged in the sealing groove of the outer wall of the spindle assembly 42.

[0092] In the embodiment, the horizontally extended platform 411, the back expansion plate 412, the first side plate 413, the second side plate 414 and the spindle mounting portion 415 are connected as an integrated structure, for example, an integrally formed casting. The spindle mounting portion 415 is integrally formed with the lifting bearing seat 41, which can improve the manufacturing efficiency, reduce the manufacturing cost, and improve the stability of the spindle mounting portion 415, and further improve the stability of the spindle assembly 42.

[0093] Further, with reference to Figure 5As shown, the rear side of the horizontally extended platform 411 is provided with a thickened part B, and the distance L1 between the lower surface of the front side of the horizontally extended platform 411 and the lower end surface of the main shaft mounting part 415 is greater than the distance L2 between the lower surface of the thickened part B and the lower end surface of the main shaft mounting part 415. The thickened part B can change the overall gravity center of the lifting carrier 41, so that the gravity center of the lifting carrier 41 is lower and closer to the column 30, thereby improving the stability of the lifting of the lifting carrier 41, and further improving the stability of the main shaft assembly 42.

[0094] In the embodiment, to further improve the structural strength of the lifting carrier 41, the front side of the main shaft mounting part 415 is transitioned to the lower surface of the front side of the horizontally extended platform 411 through a first step C, and the rear side of the main shaft mounting part 415 is transitioned to the lower surface of the thickened part B through a second step D, and the distance L3 between the first step C and the lower end surface of the main shaft mounting part 415 is greater than the distance L4 between the second step D and the lower end surface of the main shaft mounting part 415.

[0095] The above embodiment is only a preferred solution of the present application, and is not limited thereto. Based on the above, targeted adjustments can be made according to actual needs to obtain different embodiments. For example, in addition to driving the main shaft assembly 42 by using a belt mechanism, other driving modes can also be used, or the cooling nozzle follower unit 441 is manually adjusted, or the online measurement unit 442 is driven by using an oil cylinder or other telescopic or rotating components, etc. Since there are many possible modes, they will not be illustrated one by one here.

[0096] The main shaft system provided by the present application can leave space for installing the main shaft driving unit 43 and other important auxiliary functional units 44 in the interior of the lifting carrier 41, so that the main shaft driving unit 43 and the auxiliary functional unit 44 do not need to be installed outside, which facilitates the installation and maintenance of the main shaft driving unit 43 and the auxiliary functional unit 44. By reasonably arranging the positions of the main shaft driving unit 43 and the auxiliary functional unit 44 on the lifting carrier 41, the weight balance at each position of the lifting carrier 41 is ensured, which can improve the dynamic performance of the movement of the grinding wheel or the cutter, thereby improving the machining precision and the machining efficiency.

[0097] In addition to the above main shaft system, the present application also provides a vertical gear machine tool, which can be a gear grinding machine tool or a gear milling machine tool, and has a main shaft system for installing a grinding wheel or a cutter, and the main shaft system is the main shaft system described above. For the remaining structure of the vertical gear machine tool, please refer to the prior art, which will not be described here.

[0098] The embodiments of the present application are described in detail above in combination with the drawings, but the present application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the purpose of the present application.

Claims

1. A spindle system characterized by, The application relates to a vertical machining center, which comprises a column, a lifting carrier seat, a main shaft assembly, a main shaft driving unit and an auxiliary function unit. The lifting carrier seat comprises a horizontally extended platform and a back expansion plate; the back expansion plate is installed on the column through a Z-axis guide rail to realize the lifting of the lifting carrier seat along the Z-axis; the horizontally extended platform is perpendicular to the back expansion plate and forms an upper accommodating space; a main shaft mounting portion is arranged at the center of the horizontally extended platform and extends downward; The main shaft assembly is installed on the main shaft mounting portion, and a power input end of the main shaft assembly extends into the upper accommodating space; The main shaft driving unit is arranged beside the power input end in the upper accommodating space and is connected with the power input end through a transmission mechanism; The auxiliary function unit is partially arranged in the upper accommodating space and is arranged beside the power input end, and the auxiliary function unit has a component which passes through the horizontally extended platform and a hole position of the horizontally extended platform for the component to pass through; Along the Y-axis direction, the lifting carrier seat is divided into a left side area and a right side area with the main shaft mounting portion as a weight symmetry center, and the left side area and the right side area are balanced in weight; the main shaft driving unit is installed on the left side area, and the main shaft driving unit comprises a main shaft motor and an eccentric main shaft motor which are arranged in the Y-axis direction; the auxiliary function unit is installed on the right side area, and the auxiliary function unit comprises a cooling nozzle follow-up unit and an online measurement unit which are arranged in the Y-axis direction; Along the X-axis direction, the lifting carrier seat is divided into an inner side area and an outer side area with the main shaft mounting portion as a weight symmetry center; the weight of the main shaft motor is greater than that of the eccentric main shaft motor, the main shaft motor is installed on the inner side area, and the eccentric main shaft motor is installed on the outer side area; the weight of the cooling nozzle follow-up unit is greater than that of the online measurement unit, the online measurement unit is installed on the inner side area, and the cooling nozzle follow-up unit is installed on the outer side area; The lifting carrier seat further comprises a first side plate and a second side plate, the first side plate is arranged on the left side area, the second side plate is arranged on the right side area, and the horizontally extended platform, the back expansion plate, the first side plate and the second side plate jointly form the upper accommodating space; The horizontally extended platform, the back expansion plate, the first side plate, the second side plate and the main shaft mounting portion are connected into an integrated structure; The lifting carrier seat further comprises a thickened portion which is connected with the main shaft mounting portion into an integrated structure and is arranged on one side of the horizontally extended platform close to the column; The distance L1 between the lower surface of the horizontally extended platform and the lower end surface of the main shaft mounting portion is greater than the distance L2 between the lower surface of the thickened portion and the lower end surface of the main shaft mounting portion. Along the X-axis direction, the lifting carrier seat is divided into an inner side area and an outer side area with the main shaft mounting portion as a weight symmetry center; 2. The spindle system of claim 1, wherein, ​ The main shaft driving unit is installed in the inner side area, and the main shaft driving unit comprises a main shaft motor and an eccentric main shaft motor, the weight of the main shaft motor is greater than the weight of the eccentric main shaft motor, the main shaft motor is installed in the left side area, and the eccentric main shaft motor is installed in the right side area. The auxiliary function unit is installed in the outer side area, and the auxiliary function unit comprises a cooling nozzle servo unit and an online measurement unit, the weight of the cooling nozzle servo unit is greater than the weight of the online measurement unit, the online measurement unit is installed in the left side area, and the cooling nozzle servo unit is installed in the right side area.

3. The spindle system of claim 1, wherein, From top to bottom along the Z-axis direction, the widths of the first side plate and the second side plate in the Y-axis direction gradually increase, and the middle parts of the first side plate and the second side plate are each provided with a weight-reducing hole.

4. The spindle system of claim 1, wherein, The back expansion plate is provided with a longitudinal main rib plate, the main rib plate is arranged in the right side area, the auxiliary function unit comprises an online measurement unit, and the online measurement unit is arranged between the main rib plate and the second side plate. The back expansion plate is also provided with a transversely and longitudinally intersecting auxiliary rib plate, and the auxiliary rib plate is arranged between the main rib plate and the first side plate. The height of the main rib plate is greater than that of the auxiliary rib plate.

5. The spindle system according to any one of claims 1, wherein, From top to bottom along the Z-axis direction, the outer diameters of the main shaft mounting portions gradually decrease. The main shaft assembly comprises a main body portion and an annular flange, the main body portion is located between the power input end and the annular flange, the main body portion is arranged in the main shaft mounting portion, and the annular flange abuts against the lower end surface of the main shaft mounting portion.

6. A vertical gear machine tool comprising a spindle system provided with a grinding wheel or a tool, characterized in that The main shaft system is the main shaft system according to any one of claims 1 to 5.

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