A main shaft device of an extra-heavy vertical power spinning machine

Abstract

This invention discloses a spindle device for a heavy-duty vertical high-power spinning machine, belonging to the technical field of forming and manufacturing devices for large spherical box-bottom parts. The invention includes a base for fixed connection to the machine bed, a turntable for supporting the mandrel, an output shaft that outputs driving force to the turntable, and a reduction gearbox that transmits power to the output shaft. The base is rotatably connected to the turntable via bearings on its vertical axis, enabling the turntable to rotate on a horizontal plane. The rotation center axis of the turntable is parallel to the axis of the output shaft. The output shaft and the reduction gearbox are located on the side of the base. This invention features a simple overall structure, easy manufacturing, time-saving and labor-saving clamping, convenient centering, applicability to heavy-duty molds, and stepless speed regulation, thus improving manufacturing efficiency.

Description

Technical Field

[0001] This invention relates to the technical field of forming and manufacturing equipment for large spherical box bottom parts, and particularly to the spindle device of an ultra-heavy vertical high-power spinning machine. Background Technology

[0002] Currently, for spinning spherical box-bottom parts with a diameter of 3m, the only existing technology is a large-scale horizontal high-power spinning machine, which includes a horizontal spindle box, an adjustable-angle symmetrically arranged longitudinal and transverse feed device, a tailstock, etc. Figure 1 As shown, the spindle box structure of this large horizontal high-power spinning machine is similar to that of a heavy-duty horizontal lathe. The spindle structure has a three-stage reduction mechanism and a shifting mechanism, consisting of an input shaft assembly, a two-axis assembly, a spindle assembly, and a shifting assembly. The spindle assembly contains a large-sized bearing with an inner diameter of 506mm. The front end of the spindle assembly can be fitted with different turntables according to the size of the mandrel to meet the processing requirements of parts with different diameters. The shifting assembly can achieve stepped speed change. During operation, the mandrel weighing about 30 tons is first clamped at the front end of the spindle. After alignment, the blank of the circular sheet is clamped at the front end of the mandrel. Finally, the tailstock clamping fixture is used to support the blank, completing the preparation work. During processing, the spindle rotates, driving the mandrel, blank, and tailstock to rotate together. The heating gun preheats the blank. After reaching the specified temperature, the longitudinal and transverse devices drive the spinning wheel to process the blank step by step.

[0003] This large horizontal high-power spinning machine, while having low requirements for factory buildings, simple foundations, and easy access for operators to the adjacent work area, offering convenient operation and high flexibility, suffers from several drawbacks. Its layout references the structure of heavy-duty horizontal lathes, allowing it to support heavy molds and workpieces. Since the spinning force is hundreds of times greater than the cutting force, the strength and rigidity requirements for related parts are higher than on a lathe, necessitating a more robust design for the spindle and other structures. This ultimately leads to manufacturing difficulties and increased costs for multiple bearings and the spindle. Furthermore, during preparation, the heavy mold requires a large clearance in the positioning shaft holes due to its weight, resulting in poor coaxiality between the mold and the spindle. Because the spindle turntable is smaller than the mold, it's impossible to add ejector pins or other mechanisms, leading to poor mold alignment. In summary, the existing technology results in significant workpiece eccentricity and uneven wall thickness, affecting the precision of the bottom parts. Therefore, it is necessary to add another processing step and its equipment to further ensure the precision of the bottom parts.

[0004] Furthermore, as the final product rises and falls, the spinning force of its larger diameter box-bottom parts approaches 1200kN. If the existing technology structure is used, it will pose a greater challenge to the rigidity of the spindle, and its defects will be further amplified. For example, based on analogy calculations, the spindle assembly of the new equipment needs to use angular contact ball bearings, self-aligning bearings, thrust bearings, etc. with a diameter of nearly 1000m. The manufacturing difficulty of its precision matching is very high. As the workpiece diameter increases, the center height of the spindle also increases, making the operation of centering and locking the mandrel inconvenient. It loses the advantages of the horizontal layout. The larger the part, the heavier the mandrel, and the more laborious and time-consuming it is to clamp and center the mandrel.

[0005] Therefore, based on the above problems, those skilled in the art urgently need to develop a spindle device for an ultra-heavy vertical high-power spinning machine. Summary of the Invention

[0006] The purpose of this invention is to overcome the defects of the existing technology and provide a spindle device for an ultra-heavy-duty vertical high-power spinning machine. It changes the clamping method of molds and parts from horizontal support to vertical support. It has the characteristics of simple overall structure, easy manufacturing, time-saving and labor-saving clamping, convenient centering, applicability to heavy-duty molds, and stepless speed regulation, thereby improving manufacturing efficiency.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] The present invention discloses a spindle device for an ultra-heavy-duty vertical high-power spinning machine, comprising:

[0009] The base is fixedly connected to the bed, the turntable carries the core mold, the output shaft outputs driving force to the turntable, and the gearbox transmits power to the output shaft. The base is rotatably connected to the turntable on the vertical axis via bearings, so that the turntable can rotate on the horizontal plane. The rotation center axis of the turntable is parallel to the axis of the output shaft. The output shaft and the gearbox are located on the side of the base.

[0010] Furthermore, the gearbox is equipped with an input shaft whose axis is perpendicular to the output shaft, so that the input shaft can transmit power horizontally.

[0011] Furthermore, one side of the base has a mounting surface, which is fixedly connected to the housing on which the output shaft is mounted. One end of the output shaft is driven by the input shaft through a bevel gear, and the other end is driven by the turntable through a helical gear.

[0012] Furthermore, the gearbox includes the housing, a motor, a support for the motor, and an output shaft mounted on the housing. The power shaft of the motor is fixedly connected to the output shaft via a coupling.

[0013] Furthermore, the base includes a square-structured base portion, which is integrally formed with a thin-walled annular portion for accommodating the turntable. The bearing includes an inner ring and an outer ring, with the base portion fixedly connected to the inner ring and the outer ring fixedly connected to the turntable.

[0014] Furthermore, the turntable has a circular structure;

[0015] The lower part of the turntable has a countersunk hole with a circular structure that mates with the outer ring. The countersunk hole has a stepped shoulder with a structure concentric with the countersunk hole, and a gear ring is installed on the shoulder.

[0016] A positioning ring is fixedly connected to the upper part of the turntable for positioning the core mold.

[0017] Furthermore, the upper surface of the turntable is circumferentially arrayed with several T-slots, and a push rod assembly is installed between two adjacent T-slots;

[0018] The upper surface of the turntable is also provided with a combination wedge key for connecting the turntable and the core mold.

[0019] Furthermore, a window is provided between two adjacent T-slots on the upper surface of the turntable, and the window communicates with the interior of the turntable.

[0020] Furthermore, a ring-shaped boss is formed on the upper surface of the base portion. The outer wall of the boss is in clearance fit with the inner ring, and a first guide structure for guiding the inner ring into position is provided at the top edge of the boss, and a second guide structure for guiding the turntable into position is provided at the top edge of the outer ring.

[0021] Furthermore, the top of the annular portion is provided with a labyrinth sealing structure for preventing foreign objects from entering between the annular portion and the turntable, and the lower part of the annular portion is provided with a number of reinforcing ribs in the circumferential direction, the reinforcing ribs being cast together with the annular portion and the base portion.

[0022] In the above technical solution, the spindle device of the ultra-heavy-duty vertical high-power spinning machine provided by the present invention has the following advantages:

[0023] 1) The core mold position adjustment is simple and convenient, reducing labor intensity;

[0024] 2) The base and turntable can vertically bear the 5000kN axial force given by the core mold, workpiece weight, spinning force and tail force. Compared with the existing technology, the combined force will not cause bending deformation of the spindle.

[0025] 3) The gearbox contains a primary reduction mechanism that directly connects the motor to the input shaft and the bevel gear. Compared with the prior art, it eliminates the shifting system and pulley. After the output shaft gear meshes with the gear ring, a secondary reduction is formed, which completes the transmission of the main motor torque. Compared with the horizontal spindle layout of the prior art, the spindle device of the present invention has fewer parts and a simpler structure, which not only shortens the manufacturing cycle, but also reduces the usage and maintenance time, and has higher economic and technical efficiency. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0027] Figure 1 This is a schematic diagram of a horizontal spindle box in the prior art;

[0028] Figure 2 This is a top view of the spindle assembly of an ultra-heavy vertical high-power spinning machine disclosed in this invention;

[0029] Figure 3 yes Figure 2 AA section view;

[0030] Figure 4 yes Figure 3 A magnified view of a portion of position B;

[0031] Figure 5 yes Figure 3 A magnified view of the C position;

[0032] Figure 6 This is a sectional view of the turntable of the main shaft device of an ultra-heavy vertical high-power spinning machine disclosed in this invention;

[0033] Figure 7 This is a schematic diagram of the main shaft device turntable of an ultra-heavy vertical high-power spinning machine disclosed in this invention, with a mandrel installed.

[0034] Figure 8 yes Figure 7 A magnified view of a portion of the image.

[0035] Explanation of reference numerals in the attached figures:

[0036] 10. Base; 11. Base portion; 111. Mounting surface; 112. Boss; 113. First chamfer; 114. Second chamfer; 12. Circular portion; 121. Protrusion; 13. Reinforcing rib;

[0037] 20. Turntable; 21. Countersunk hole; 22. Shoulder; 23. Round hole; 24. T-slot; 25. Keyway; 26. Window; 27. Rib; 28. Annular groove;

[0038] 30. Bearing; 31. Inner ring; 32. Outer ring; 321. Third chamfer; 322. Fourth chamfer;

[0039] 40. Gearbox; 41. Output shaft; 411. Helical gear; 412. Bevel gear; 42. Input shaft; 43. Motor; 431. Support; 44. Coupling;

[0040] 50. Push rod assembly; 51. Push rod seat; 52. Push rod;

[0041] 60. Combination wedge key; 61. Clamping key; 62. Wedge key seat;

[0042] 70. Gear ring;

[0043] 80. Positioning ring;

[0044] 90. Core mold;

[0045] Prior art reference numerals;

[0046] 1. Input shaft assembly; 2. Two-axis assembly; 3. Spindle assembly; 4. Gear shifting assembly; 5. Core mold. Detailed Implementation

[0047] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0048] See Figure 2-8 As shown;

[0049] An invention relates to a spindle assembly for an ultra-heavy-duty vertical high-power spinning machine, comprising:

[0050] The base 10 is fixedly connected to the bed, the turntable 20 carries the core mold 90, the output shaft 41 outputs driving force to the turntable 20, and the gearbox 40 transmits power to the output shaft 41. The base 10 is rotatably connected to the turntable 20 on the vertical axis via a bearing 30, so that the turntable 20 can rotate on the horizontal plane. The rotation center axis of the turntable 20 is parallel to the axis of the output shaft 41. The output shaft 41 and the gearbox 40 are located on the side of the base 10.

[0051] For details, see Figure 3As shown, in this structure, the lower part of the base 10 is fixedly connected to the bed, and the upper part of the base 10 is rotatably connected to the turntable 20 through the bearing 30. The bearing 30 is a prior art model 132.60.3380.03P5, manufactured by Luoyang Special Heavy Machinery. The bearing is a four-row cylindrical roller combination bearing, with an integral outer ring and an inner ring composed of two semi-circles. The axial clearance of the complete bearing is +0.05 to +0.15 mm, and the radial clearance is +0.10 to +0.2 mm. The structure is stable and highly reliable. When the diameter of the outer ring 32 of the bearing 30 does not exceed 500 mm, a greater output capacity can be achieved.

[0052] The upper surface of the turntable 20 is equipped with a core mold 90. The turntable 20 can rotate around the vertical axis of the base 10 on the horizontal plane, making the turntable 20 more stable and the force more balanced when carrying the core mold 90. The output shaft 41 and the reduction gearbox 40 are located on the side of the base 10, and the rotation center axis of the turntable 20 is parallel to the axis of the output shaft 41. That is to say, the base 10 and the reduction gearbox 40 are arranged horizontally, which lowers the physical center of gravity of the main shaft device of the ultra-heavy vertical high-power spinning machine and improves the overall stability of the main shaft device.

[0053] See Figure 3 As shown, preferably, the reduction gearbox 40 is equipped with an input shaft 42 whose axis is perpendicular to the output shaft 41, so that the input shaft 42 transmits power horizontally.

[0054] It helps to reduce the size of the housing, the number of shaft parts, and the outer diameter of the bearings, which facilitates the installation of DC motors and ensures safe horizontal use, further improving the overall stability and reliability of the spindle assembly.

[0055] See Figure 3 As shown, preferably, the base 10 has a mounting surface 111 on one side, which is fixedly connected to the housing on which the output shaft 41 is mounted. One end of the output shaft 41 is driven by the input shaft 42 through a bevel gear 412, and the other end is driven by the turntable 20 through a helical gear 411.

[0056] Specifically, in this structure, the output shaft 41 is integrated into the side of the base 10 through a housing. The housing is made of integral casting, which has good rigidity, is easy to process, has a compact structure, and high precision, ensuring precise transmission. The output shaft 41 is vertically installed in the housing. A helical gear 411 is fixedly connected to the top of the output shaft 41. A gear ring 70 is installed on the turntable 20. The helical gear 411 meshes with the gear ring 70. A bevel gear 412 is fixedly connected to the bottom of the output shaft 41. The output shaft 41 and the input shaft 42 are driven by a pair of bevel gears.

[0057] join Figure 3As shown; preferably, the gearbox 40 includes a housing, a motor 43, a support 431 for supporting the motor 43, and an input shaft 42 mounted on the housing. The power shaft of the motor 43 is fixedly connected to the input shaft 42 through a coupling 44.

[0058] Specifically, the gearbox 40 has an input shaft 42 horizontally mounted on the side away from the base 10. One end of the input shaft 42 is placed inside the gearbox and meshes with a bevel gear 412 through a gear. The other end of the input shaft 42 is fixedly connected to the power shaft of the motor 43 through a coupling 44. Preferably, the motor 43 is a DC motor, which can achieve uniform and smooth stepless speed regulation under heavy load conditions, and has a wide speed regulation range. The lower part of the motor 43 can be fixedly connected to the foundation building through a support 431.

[0059] See Figure 3 As shown, preferably, the base 10 includes a square base portion 11, the base portion 11 being integrally formed with a thin-walled annular portion 12 for accommodating the turntable 20, the bearing 30 including an inner ring 31 and an outer ring 32, the base portion 11 being fixedly connected to the inner ring 31, and the outer ring 32 being fixedly connected to the turntable 20.

[0060] Specifically, the base 10 is cast, and the lower part of the base 10 is a square base part 11 to increase the contact area. At the same time, the square has a precision-machined surface around the perimeter, which is conducive to positioning and adjustment around the perimeter. The bottom of the base part 11 is fixedly connected to the machine tool bed by bolts. The top of the base part 11 has an integrally formed circular thin-walled ring part 12. The ring part 12 covers the gear ring 70 and part of the rotary table 20 inside the base 10. In order to improve the connection strength between the ring part 12 and the base part 11, several reinforcing ribs 13 are provided in the lower circumferential direction of the ring part 12. The reinforcing ribs 13 are cast together with the ring part 12 and the base part 11, thereby improving the strength of the transition position between the ring part 12 and the base part 11.

[0061] The bearing 30 includes an inner ring 31 and an outer ring 32. The inner ring 31 is fixedly connected to the base 11 by bolts, and the outer ring 32 is fixedly connected to the bottom wall of the countersunk hole 21 of the turntable 20 by bolts.

[0062] See Figure 2 As shown, preferably, the turntable 20 has a circular structure;

[0063] The lower part of the turntable 20 has a countersunk hole 21 with a circular structure that mates with the outer ring 32. The countersunk hole 21 has a stepped shoulder 22 concentric with the countersunk hole 21. A gear ring 70 is installed on the shoulder 22.

[0064] A positioning ring 80 is fixedly connected to the upper part of the turntable 20 for positioning the core mold 90.

[0065] Specifically, the turntable 20 is a cast disc-shaped part. Ribs 27 are evenly distributed inside the turntable 20, enabling it to withstand a resultant force of 5000KN. (See [reference]). Figure 6 As shown, the turntable 20 has a countersunk hole 21 at the bottom, which is fitted with the outer ring 32 of the bearing 30 with a small clearance through the countersunk hole 21. The turntable 20 has a shoulder 22 outside the countersunk hole 21, and the shoulder 22 is concentric with the countersunk hole 21. The gear ring 70 is fitted on the outside of the shoulder 20, and the top of the gear ring 70 is fixedly connected to the end face of the shoulder 22 by bolts. The upper surface of the turntable 20 is positioned by a positioning ring 80 to locate the core mold 90.

[0066] See Figure 2 As shown, preferably, the upper surface of the turntable 20 has a plurality of T-slots 24 arranged in a circular array, and a push rod assembly 50 is installed between two adjacent T-slots 24. The upper surface of the turntable 20 is also provided with a combination wedge key 60 for connecting the turntable 20 and the core mold 90.

[0067] Specifically, the upper surface of the turntable 20 in this structure is provided with multiple T-slots 24. The T-slots 24 extend along the diameter of the turntable 20. T-bolts or T-nuts are inserted through the T-slots 24 to fix the core mold 90.

[0068] The surface of the turntable 20 is provided with a plurality of circular holes 23 for mounting the push rod assembly 50. The push rod assembly 50 includes a push rod seat 51 that can be inserted into the circular holes 23. The push rod seat 51 is threadedly connected to the push rod 52. The push rod 52 contacts the side of the core mold 90 for fine adjustment of the core mold 90 to center the core mold 90.

[0069] The surface of the rotary table 20 is also provided with a keyway 25, through which a combination wedge key 60 is installed. The combination wedge key 60 transmits the torque of the spindle to the mandrel 90. (See below) Figure 7 , 8 As shown, the combined wedge key 60 includes a clamping key 61 and a wedge key seat 62. During assembly, the wedge key seat 62 is inserted into the keyway 25. After the core mold 23 slides into the positioning ring 80, one end of the keyway of the core mold 80 is attached to the side of the wedge key seat 62. The clamping key 61 is inserted into the gap between the keyway of the core mold 80 and the wedge key seat 62. The clamping key 61 is then struck until it stops moving.

[0070] See Figure 3 As shown, preferably, a window 26 is provided between two adjacent T-slots 24 on the upper surface of the turntable 20, and the window 26 communicates with the interior of the turntable 20.

[0071] Specifically, in this structure, in order to facilitate the fixing of the outer ring 32 of the bearing 30, a window 26 is opened on the upper surface of the turntable 20. The bolts fixing the outer ring 32 can be operated through the window 26, which makes the operation convenient.

[0072] To prevent accidental foreign objects from entering the base 10 from between the turntable 20 and the annular portion 12, preferably, the top of the annular portion 12 is provided with a labyrinth sealing structure to prevent foreign objects from entering between the annular portion 12 and the turntable 20.

[0073] Specifically, in this structure, the annular groove 28 on the lower surface of the turntable 20 and the top of the annular part 12 are provided with a protrusion 121 that cooperates with the annular groove 28. The annular groove 28 and the protrusion 121 form a labyrinth sealing structure to block foreign objects and prevent external foreign objects from entering the transmission.

[0074] See figure Figure 4 , 5 As shown, preferably, a ring-shaped boss 112 is formed on the upper surface of the base portion 11. The outer wall of the boss 112 is in clearance fit with the inner ring 31, and a first guide structure for guiding the inner ring 31 into position is provided at the top edge of the boss 112, and a second guide structure for guiding the turntable 20 into position is provided at the top edge of the outer ring 32.

[0075] Specifically, due to the heavy weight of the inner ring 31, outer ring 32, and turntable 20 of bearing 30 (each component weighing approximately 40 tons), to ensure high coaxiality and rotational accuracy between the base 10 and the inner ring 31, and between the outer ring 32 and the turntable 20, the inner ring 31 and the boss 112 of the base portion 11, and the outer ring 32 and the countersunk hole 31 of the turntable 20, are all fitted with small clearance. To resolve the technical contradiction between achieving high coaxiality with a very small clearance fit for heavy components and ease of assembly, and to avoid surface damage and rework during assembly, a first guide structure is provided at the top edge of the boss 112 of the base portion 11. This first guide structure guides the inner ring 31 into position, and a second guide structure is provided at the top edge of the outer ring 32. This second guide structure guides the turntable 20 into position.

[0076] See Figure 4 As shown, the boss 112 serves as a stationary component during installation. The outer edge of the top of the boss 112 is sequentially machined with a first chamfer 113 and a second chamfer 114. The first chamfer 113 and the second chamfer 114 are smoothly transitioned, making it easier for the inner ring 31 to slide in from above. The first chamfer 113 and the second chamfer 114 are the first guide structure.

[0077] See Figure 5 As shown, the outer edge of the top of the outer ring 32 of the bearing 30 is sequentially machined with a third chamfer 321 and a fourth chamfer 322. The third chamfer 321 and the fourth chamfer 322 are also smoothly transitioned to facilitate the sliding of the turntable 20 that falls from above. Similarly, in order to facilitate the assembly of the core mold 90, the core mold 90 and the positioning ring 80 are fitted with a small clearance. The outer edge of the top of the positioning ring 80 can also adopt a first guide structure or a second guide structure to facilitate the core mold 90, which weighs about 60 tons, to be inserted into the positioning surface.

[0078] In the above technical solution, the present invention provides a spindle device for an ultra-heavy-duty vertical high-power spinning machine, the working process of which is as follows:

[0079] First, clean the surface of the turntable 20, ensuring no foreign objects remain. The core mold 90 is then hoisted to a position 100mm above the turntable 20 using external hoisting equipment. The chamfer of the circular groove on the core mold 90 will slide into the chamfer of the positioning ring 80. After the core mold 90 continues to descend 50mm, rotate it so that one end of the square keyway is against the side of the wedge-shaped key seat 62. Insert the wedge-shaped clamping key 61 to rotate the core mold 90 to the accurate position. After a slow descent, the core mold 90 is firmly attached to the turntable. The motor 43 starts, and the output... The input shaft 42 rotates, driving the output shaft 41 to rotate. The output shaft 41 drives the gear ring 70 to rotate the turntable 20. One end of the dial indicator is fixed on the stationary indicator rod, and the other end is pressed against the surface of the core mold 90. According to the runout value, it can be rotated further. The push rod 52 presses against the edge of the core mold 90 to move the core mold 90 a small distance, thereby obtaining a smaller runout value, and thus obtaining a higher precision coaxiality between the core mold 90 and the turntable 20. Finally, the T-bolts and nuts in the T-slot 24 are locked to fix the core mold 90.

[0080] Beneficial effects:

[0081] 1) The core mold position adjustment is simple and convenient, reducing labor intensity;

[0082] 2) The base and turntable can vertically bear the 5000kN axial force given by the core mold, workpiece weight, spinning force and tail force. Compared with the existing technology, the combined force will not cause bending deformation of the spindle.

[0083] 3) The gearbox contains a primary reduction mechanism that directly connects the motor to the input shaft and the bevel gear. Compared with the prior art, it eliminates the shifting system and pulley. After the output shaft gear meshes with the gear ring, a secondary reduction is formed, which completes the transmission of the main motor torque. Compared with the horizontal spindle layout of the prior art, the spindle device of the present invention has fewer parts and a simpler structure, which not only shortens the manufacturing cycle, but also reduces the usage and maintenance time, and has higher economic and technical efficiency.

[0084] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A spindle assembly for an ultra-heavy-duty vertical high-power spinning machine, characterized in that, include: The base (10) is fixedly connected to the bed, the turntable (20) carries the core mold (90), the output shaft (41) outputs driving force to the turntable (20), and the gearbox (40) transmits power to the output shaft (41). The base (10) is rotatably connected to the turntable (20) on the vertical axis via a bearing (30), so that the turntable (20) can rotate on the horizontal plane. The rotation center axis of the turntable (20) is parallel to the axis of the output shaft (41). The output shaft (41) and the gearbox (40) are located on the side of the base (10). The base (10) includes a square base portion (11), which is integrally formed with a thin-walled annular portion (12) for accommodating the turntable (20). The bearing (30) includes an inner ring (31) and an outer ring (32). The base portion (11) is fixedly connected to the inner ring (31), and the outer ring (32) is fixedly connected to the turntable (20). The turntable (20) has a circular structure; The turntable (20) has a circular countersunk hole (21) at the bottom that mates with the outer ring (32). The countersunk hole (21) has a stepped shoulder (22) concentric with the countersunk hole (21) on the outside. A gear ring (70) is installed on the shoulder (22). A positioning ring (80) is fixedly connected to the upper part of the turntable (20) for positioning the core mold (90). The upper surface of the turntable (20) has a circumferential array of several T-slots (24). The T-slots (24) extend along the diameter of the turntable (20). The T-slots (24) are suitable for inserting T-bolts or T-nuts. A window (26) is provided between two adjacent T-slots (24). The window (26) communicates with the interior of the turntable (20). A push rod assembly (50) is installed between two adjacent T-slots (24). The push rod assembly (50) includes a push rod seat (51) provided on the turntable (20). The push rod seat (51) is threadedly connected to a push rod (52) and contacts the side of the core mold (90) through the push rod (52). The upper surface of the turntable (20) is also provided with a combination wedge key (60) for connecting the turntable (20) and the core mold (90). The combination wedge key (60) includes a clamping key (61) and a wedge key seat (62). The wedge key seat (62) is adapted to contact the keyway of the core mold (90), and the clamping key (61) is adapted to be placed between the wedge key seat (62) and the core mold (90). The upper surface of the base (11) has a ring-shaped boss (112). The outer wall of the boss (112) is in clearance fit with the inner ring (31). The top edge of the boss (112) is provided with a first guide structure composed of a first chamfer (113) and a second chamfer (114). The first guide structure is used to guide the inner ring (31) into place. The top edge of the outer ring (32) is provided with a second guide structure for guiding the turntable (20) into place.

2. The spindle assembly of a heavy-duty vertical high-power spinning machine according to claim 1. Its characteristics are: The gearbox (40) is equipped with an input shaft (42) whose axis is perpendicular to the output shaft (41) so that the input shaft (42) can transmit power horizontally.

3. The spindle assembly of a heavy-duty vertical high-power spinning machine according to claim 2, characterized in that... ； The base (10) has a mounting surface (111) on one side. The mounting surface (111) is fixedly connected to the housing on which the output shaft (41) is mounted. One end of the output shaft (41) is driven by the input shaft (42) through a bevel gear (412), and the other end is driven by the turntable (20) through a helical gear (411).

4. The spindle assembly of a heavy-duty vertical high-power spinning machine according to claim 3. Its characteristics are: The gearbox (40) includes the housing, the motor (43), the support (431) for supporting the motor (43), and the input shaft (42) mounted on the housing. The power shaft of the motor (43) is fixedly connected to the input shaft (42) through a coupling (44).

5. The spindle assembly of a heavy-duty vertical high-power spinning machine according to claim 1, characterized in that... ； The top of the annular part (12) is provided with a labyrinth sealing structure for preventing foreign objects from entering between the annular part (12) and the turntable (20). The lower part of the annular part (12) is provided with a number of reinforcing ribs (13) in the circumferential direction. The reinforcing ribs (13) are cast together with the annular part (12) and the base part (11).

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