A hob headstock assembly for a small module CNC hobbing machine

Abstract

The present invention relates to the field of gear transmission technology, and specifically to a gear hobbing tool holder assembly for a small-module CNC gear hobbing machine, comprising an assembly bracket and a tool fixing bracket. The present invention realizes multiple driving modes for the tool connecting shaft by providing servo motor 1 and servo motor 2. Servo motor 1 can realize one transmission mode by driving a gear transmission combination of spur gear 1, transmission spur gear 1, transmission spur gear, adjustment spur gear 1, and matching spur gear 1; servo motor 2 can realize another transmission mode by combining a planetary gear structure, planetary gears, an inner gear ring, an outer gear ring, and the matching of adjustment spur gear 2 and matching spur gear 2. In actual processing, the operator can flexibly switch between different driving modes according to the specific requirements of the workpiece to be processed, such as the gear module, material, etc., thereby adjusting the speed and torque of the tool connecting shaft to meet diverse processing needs and improve the processing adaptability and processing capacity of the gear hobbing tool holder assembly.

Description

Technical Field

[0001] The invention relates to the technical field of gear transmission, in particular to a gear hobbing tool holder assembly for a small-module CNC gear hobbing machine. Background Art

[0002] Gear hobbing machines are the most widely used type of gear processing machine tools. They can cut spur and helical cylindrical gears, as well as worm gears, sprockets, and other gears. The hobbing toolholder is the most important and complex component of CNC machine tools. Its widespread use on high-performance machine tools has not only improved machining efficiency and precision, reduced production costs, but has also driven the rapid development of related industries.

[0003] Most traditional toolholder assemblies have a loose structural layout, with complex and unstable connections between components. This not only makes installation and disassembly cumbersome, requiring significant labor and time, but also, over long-term use, mechanical vibration and other factors can easily lead to component loosening and displacement, seriously impacting gear hobbing precision and equipment reliability. For example, some traditional toolholders utilize non-detachable connections such as welding between the bracket and the tool holder. Damage to any component can be extremely difficult to repair, potentially requiring the entire toolholder assembly to be replaced. Traditional gear hobbing toolholder assemblies typically rely on a single transmission method to drive the tool connection shaft. This single transmission method lacks the flexibility to adjust the transmission ratio and torque output to accommodate diverse machining conditions, such as machining gears of varying modules or workpiece materials. Machining small-module gears requires extremely high tool speed and precision, which traditional single transmission methods often struggle to meet. This results in low gear precision, poor surface quality, and high scrap rates. Summary of the Invention

[0004] The present invention aims to provide a gear hobbing tool holder assembly for a small-module CNC gear hobbing machine.

[0005] In order to achieve the above-mentioned effect, the technical solution adopted by the present invention is: a gear hobbing tool holder assembly for a small-module CNC gear hobbing machine, comprising: an assembly bracket and a tool fixing bracket, a tool fixing bracket is fixedly provided on one side of the assembly bracket, a gear hobbing cutter is rotatably provided inside the tool fixing bracket, a tool dismantling bracket is fixedly provided on the front of the tool fixing bracket through a bolt group, a rotating connecting block is rotatably provided on the side of the tool dismantling bracket close to the gear hobbing cutter, a tool connecting shaft is rotatably provided inside the assembly bracket, one end of the tool connecting shaft extends to the interior of the gear hobbing cutter, and the back side of the rotating connecting block is fixedly connected to one end of the tool connecting shaft through a coupling.

[0006] Preferably, the assembly bracket includes an assembly mounting frame and a fixed side panel, and fixed side panels are fixedly provided on both sides of the assembly mounting frame by a bolt group, servo motor 1 is fixedly provided on the front side of the fixed side panel located on the front, and servo motor 2 is fixedly provided on the back side of the fixed side panel located on the back.

[0007] Preferably, a fixed plate is fixedly provided on the left side inside the assembly mounting frame, a rotating shaft 1 is rotatably provided on one side of the front face of the fixed plate, a driving spur gear 1 is slidably provided on the surface of the rotating shaft 1 through an adjusting component, and the front end of the rotating shaft 1 is fixedly connected to one end of the output shaft of the servo motor 1 through a coupling; a transmission shaft is rotatably provided on one side of the front face of the fixed plate, a transmission spur gear 1 is fixedly provided on the rear side of the transmission shaft surface, and a transmission spur gear is fixedly provided on the front side of the transmission shaft surface, and the tooth surface of the transmission spur gear 1 is meshed with the tooth surface of the driving spur gear 1 for transmission.

[0008] Preferably, an adjusting shaft 1 is rotatably provided on one side of the front face of the fixed plate, and an adjusting spur gear 1 is slidably provided on the surface of the adjusting shaft 1 through an adjusting component, and the tooth surface of the adjusting spur gear 1 is meshed with the tooth surface of the transmission spur gear for transmission, and one end of the tool connecting shaft passes through the fixed plate and extends to the back side of the fixed plate, and a matching spur gear 1 meshing with the adjusting spur gear 1 is fixedly provided on one side of the surface of the tool connecting shaft.

[0009] Preferably, a rotating shaft 2 is rotatably provided on the back side of the fixed plate, and a driving spur gear 2 is slidably provided on the surface of the rotating shaft 2 through an adjusting component. One end of the output shaft of the servo motor 2 extends to the interior of the assembly mounting frame, and one end of the output shaft of the servo motor 2 is fixedly connected to one end of the rotating shaft 2 through a coupling.

[0010] Preferably, one end of the transmission shaft extends to the back side of the fixed plate, and the rear end of the transmission shaft is fixedly provided with a sun gear, and the back side of the fixed plate is provided with three planetary gears that rotate around the sun gear, and the tooth surfaces of the three planetary gears are all meshed with the tooth surfaces of the sun gear for transmission, and a limiting electric cylinder is fixedly provided on the front side of the fixed side plate located on the rear side, and a planetary carrier is rotatably provided on the back side of the three planetary gears through a rotating rod, and the back side of the planetary carrier is movably connected with the driving end of the limiting electric cylinder, and an inner gear ring is rotatably provided on the back side of the fixed plate, and an inner gear ring is provided for meshing transmission with the tooth surfaces of the three planetary gears, and an outer gear ring is fixedly provided on the back side of the inner gear ring, and the tooth surface of the outer gear ring is meshed with the tooth surface of the driving spur gear 2 for transmission.

[0011] Preferably, an adjusting shaft 2 is rotatably provided on the back side of the fixed plate, and an adjusting spur gear 2 is slidably provided on the surface of the adjusting shaft 2 through an adjusting component, and the tooth surface of the adjusting spur gear 2 is meshed with the tooth surface of the outer gear ring for transmission, and a matching spur gear 2 is fixedly provided on the rear end of the tool connecting shaft, and the tooth surface of the matching spur gear 2 is meshed with the tooth surface of the adjusting spur gear 2 for transmission.

[0012] Preferably, the adjustment assembly includes: an adjustment frame, fixedly arranged on one side of the adjustment shaft surface; a plurality of adjustment electric cylinders, fixedly arranged inside the adjustment frame; a plurality of adjustment connecting holes, arranged on the side of the spur gear close to the adjustment frame, cooperating with the driving end of the adjustment electric cylinder; an external hexagonal groove, arranged on the surface of the adjustment shaft, for sliding adjustment of the spur gear; an internal hexagonal groove, arranged inside the spur gear, cooperating with the external hexagonal groove.

[0013] Preferably, several adjusting electric cylinder driving ends inside the adjusting frame are connected to several adjusting connecting holes on one side of the spur gear, driving the spur gear to slide and control on the surface of the outer hexagonal groove of the adjusting shaft.

[0014] Preferably, the tool changing rack is fixed to the front side of the tool fixing rack by a bolt group, so as to facilitate the removal and installation of the gear hobbing cutter.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The assembly bracket consists of an assembly mounting frame and fixed side panels connected by bolts. This modular, detachable structural design makes the overall layout compact and reasonable. During the installation process, operators can quickly and accurately assemble the various components into place, greatly reducing installation time. During the equipment maintenance phase, if a component fails, the corresponding fixed side panel can be easily removed to inspect or replace the internal components without large-scale disassembly of the entire tool holder assembly, greatly improving maintenance efficiency and reducing maintenance costs. If servo motor 1 or servo motor 2 fails, simply remove the bolts on the corresponding fixed side panel to remove the motor for repair or replacement.

[0017] 2. By setting up servo motor 1 and servo motor 2, this solution realizes multiple driving modes for the tool connecting shaft. Servo motor 1 can realize one transmission mode by driving the gear transmission combination of spur gear 1, transmission spur gear 1, transmission spur gear, adjustment spur gear 1 and matching spur gear 1; servo motor 2 realizes another transmission mode through the planetary gear structure, planetary gear, inner gear ring, outer gear ring and the coordination of adjustment spur gear 2 and matching spur gear 2. In actual processing, the operator can flexibly switch different driving modes according to the specific requirements of the workpiece, such as gear module, material, etc., so as to adjust the speed and torque of the tool connecting shaft to meet diverse processing needs and improve the processing adaptability and processing capability of the hobbing tool holder assembly.

[0018] 3. The planetary gear structure (including the sun gear, planetary gears, inner ring gear, and outer ring gear) can achieve a large transmission ratio within a limited space. The sun gear drives the planetary gears to rotate, which in turn drives the inner ring gear, which is then transmitted through the outer ring gear. This complex motion transmission method not only achieves efficient power transmission within a small space, but also can withstand large loads. When machining large-module gears or workpieces requiring high cutting forces, the planetary gear structure can stably transmit power to the tool connecting shaft, ensuring smooth machining and improving the operating stability and reliability of the hobbing toolholder assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only represent some embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 Schematic diagram of a gear hobbing tool holder assembly structure for a small-module CNC gear hobbing machine according to an embodiment of the present invention;

[0021] Figure 2 Schematic diagram of a tool fixing frame and a gear hobbing cutter structure according to an embodiment of the present invention;

[0022] Figure 3 is a schematic diagram of the internal structure of the assembly installation frame according to an embodiment of the present invention;

[0023] Figure 4 Schematic diagram of the structure of the driving spur gear 2 and the mating spur gear 2 according to an embodiment of the present invention;

[0024] Figure 5 is a schematic diagram of the outer gear ring and inner gear ring structure according to an embodiment of the present invention;

[0025] Figure 6 Schematic diagram of the structure of a driving spur gear 1 and a mating spur gear 1 according to an embodiment of the present invention;

[0026] Figure 7 It is a schematic diagram of the structure of the second adjusting shaft and the second adjusting spur gear according to an embodiment of the present invention.

[0027] In the figure, 1. assembly bracket; 2. tool fixing bracket; 3. gear hobbing cutter; 4. tool removal and replacement bracket; 5. assembly mounting frame; 6. fixed side plate; 7. servo motor 1; 8. servo motor 2; 9. tool connecting shaft; 10. rotating connecting block; 11. driving spur gear 1; 12. rotating shaft 1; 13. transmission spur gear 1; 14. transmission shaft; 15. transmission spur gear; 16. adjusting shaft 1; 17. adjusting spur gear 1; 18. matching spur gear 1; 19. driving spur gear 2; 20. rotating shaft 2; 21. outer ring gear; 22. inner ring gear; 23. sun gear; 24. planetary gear; 25. planetary carrier; 26. limit electric cylinder; 27. adjusting shaft 2; 28. adjusting spur gear 2; 29. matching spur gear 2; 30. adjusting bracket; 31. adjusting electric cylinder; 32. adjusting connecting hole; 33. fixing plate. DETAILED DESCRIPTION

[0028] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0029] Example 1

[0030] See also Figures 1 to 7 As shown, this embodiment discloses a gear hobbing tool holder assembly for a small-module CNC gear hobbing machine, comprising: an assembly bracket 1 and a tool fixing bracket 2, wherein the tool fixing bracket 2 is fixedly provided on one side of the assembly bracket 1, and a gear hobbing cutter 3 is rotatably provided inside the tool fixing bracket 2, a tool dismantling bracket 4 is fixedly provided on the front of the tool fixing bracket 2 by a bolt group, and a rotating connecting block 10 is rotatably provided on the side of the tool dismantling bracket 4 close to the gear hobbing cutter 3, a tool connecting shaft 9 is also rotatably provided inside the assembly bracket 1, and one end of the tool connecting shaft 9 extends to the interior of the gear hobbing cutter 3, and the back side of the rotating connecting block 10 is fixedly connected to one end of the tool connecting shaft 9 by a coupling.

[0031] Specifically, the assembly bracket 1 includes an assembly mounting frame 5 and a fixed side plate 6. The fixed side plates 6 are fixedly mounted on both sides of the assembly mounting frame 5 via bolt groups. A servo motor 7 is fixedly mounted on the front side of the fixed side plate 6 located on the front, and a servo motor 8 is fixedly mounted on the back side of the fixed side plate 6 located on the back. Furthermore, a fixed plate 33 is fixedly mounted on the left side of the interior of the assembly mounting frame 5. A rotating shaft 12 is rotatably mounted on one side of the front of the fixed plate 33. A driving spur gear 11 is slidably mounted on the surface of the rotating shaft 12 via an adjustment assembly. The front end of the rotating shaft 12 is fixedly connected to one end of the output shaft of the servo motor 7 via a coupling. A transmission shaft 14 is rotatably mounted on one side of the front of the fixed plate 33. A transmission spur gear 13 is fixedly mounted on the rear side of the transmission shaft 14. A transmission spur gear 15 is also fixedly mounted on the front side of the transmission shaft 14. The teeth of the transmission spur gear 13 mesh with the teeth of the driving spur gear 11 for transmission.

[0032] It should be noted that the output shaft of the servo motor 7 cooperates with the rotating shaft 12 to control the driving spur gear 11 to rotate inside the assembly mounting frame 5, and the driving spur gear 11 drives the transmission spur gear 13 meshing with it to rotate synchronously, and the transmission spur gear 13 drives the coaxially arranged transmission spur gear 15 to rotate synchronously.

[0033] Furthermore, an adjusting shaft 16 is rotatably provided on one side of the front face of the fixed plate 33, and an adjusting spur gear 17 is slidably provided on the surface of the adjusting shaft 16 through an adjusting assembly, and the tooth surface of the adjusting spur gear 17 is meshed with the tooth surface of the transmission spur gear 15 for transmission. One end of the tool connecting shaft 9 passes through the fixed plate 33 and extends to the back face of the fixed plate 33, and a matching spur gear 18 meshing with the adjusting spur gear 17 is fixedly provided on one side of the surface of the tool connecting shaft 9.

[0034] It should be noted that the number of teeth of the driving spur gear 11 and the transmission spur gear 13, as well as the transmission spur gear 15, the adjustment spur gear 17 and the matching spur gear 18 are all different, so that the servo motor 17 can drive the tool connecting shaft 9 through the cooperation of multiple gears with different numbers of teeth.

[0035] Specifically, a rotating shaft 20 is rotatably provided on the back of the fixed plate 33, and a driving spur gear 2 19 is slidably provided on the surface of the rotating shaft 20 through an adjustment component. One end of the output shaft of the servo motor 2 8 extends to the interior of the assembly mounting frame 5, and one end of the output shaft of the servo motor 2 8 is fixedly connected to one end of the rotating shaft 20 through a coupling.

[0036] One end of the transmission shaft 14 extends to the back side of the fixed plate 33, and the rear end of the transmission shaft 14 is fixedly provided with a sun gear 23, and three planetary gears 24 are arranged on the back side of the fixed plate 33 to rotate around the sun gear 23, and the tooth surfaces of the three planetary gears 24 are all meshed with the tooth surfaces of the sun gear 23 for transmission. A limiting electric cylinder 26 is fixedly provided on the front side of the fixed side plate 6 located on the rear side, and a planetary carrier 25 is rotatably provided on the back side of the three planetary gears 24 through a rotating rod, and the back side of the planetary carrier 25 is movably connected to the driving end of the limiting electric cylinder 26, and an inner ring gear 22 is rotatably provided on the back side of the fixed plate 33, and the tooth surfaces of the three planetary gears 24 are meshed with the inner ring gear 22 for transmission, and an outer ring gear 21 is also fixed on the back side of the inner ring gear 22, and the tooth surface of the outer ring gear 21 is meshed with the tooth surface of the driving spur gear 2 19 for transmission.

[0037] An adjusting shaft 27 is also rotatably provided on the back of the fixed plate 33, and an adjusting spur gear 28 is slidably provided on the surface of the adjusting shaft 27 through an adjusting component. The tooth surface of the adjusting spur gear 28 is meshed with the tooth surface of the outer gear ring 21 for transmission. A matching spur gear 29 is also fixedly provided on the rear end of the tool connecting shaft 9, and the tooth surface of the matching spur gear 29 is meshed with the tooth surface of the adjusting spur gear 28 for transmission.

[0038] It should be noted that when the tool connecting shaft 9 is driven to rotate by the planetary gear structure, the rotating shaft 12 cooperates with the meshing transmission relationship of the driving spur gear 11 and the transmission spur gear 13, so that the transmission shaft 14 drives the sun gear 23 to rotate, the sun gear 23 drives the three planetary gears 24 to rotate, and the planetary gears 24 drive the inner ring gear 22 to rotate, so that the outer ring gear 21 set on the inner ring gear 22 rotates synchronously, and the meshing transmission between the outer ring gear 21 and the adjusting spur gear 2 28 and the meshing transmission between the adjusting spur gear 28 and the matching spur gear 2 29 is utilized to realize the driving of the tool connecting shaft 9.

[0039] When the tool connecting shaft 9 is driven to rotate by the outer ring gear 21, the output shaft of the servo motor 28 is used to control the rotation of the rotating shaft 20. At this time, the tooth surfaces of the control-driven spur gear 2 19 and the outer ring gear 21 are engaged in transmission. At the same time, the outer ring gear 21 drives the matching spur gear 2 29 to rotate synchronously through the adjusted spur gear 2 28 of the meshing transmission, thereby realizing the driving of the tool connecting shaft 9.

[0040] In a specific embodiment, the assembly bracket 1 in the present invention is composed of an assembly mounting frame 5 and a fixed side plate 6, which are fixed by a bolt group. This structure makes the overall layout compact and easy to install and disassemble. The servo motor 1 7 and the servo motor 2 8 are respectively fixed on the fixed side plate 6, with clear positions, which is convenient for maintenance and inspection. At the same time, the tool fixing frame 2 is fixed on one side of the assembly bracket 1, and the gear hobbing cutter 3 is installed in the tool fixing frame 2. The structural hierarchy is clear and the overall mechanical structure has good stability. By arranging the servo motor 1 7 and the servo motor 2 8, different driving modes of the tool connecting shaft 9 can be realized. The servo motor 1 7 drives the spur gear 1 11, the transmission spur gear 13, the transmission spur gear 15, the adjustment spur gear 17 and the matching spur gear. The gear transmission combination of gear 18 realizes one driving mode for the tool connecting shaft 9; the servo motor 28 can realize another driving mode for the tool connecting shaft 9 through the planetary gear structure sun gear 23, planetary gear 24, inner gear ring 22, outer gear ring 21 and the adjustment of spur gear 28 and matching spur gear 29. Multiple driving modes can be flexibly switched according to different processing requirements, thereby improving the adaptability and processing capacity of the hobbing tool holder assembly; the application of the planetary gear structure (sun gear 23, planetary gear 24, inner gear ring 22, outer gear ring 21) can achieve a larger transmission ratio and higher transmission efficiency in a limited space, and the sun gear 23 drives the planetary gear 24 to rotate, thereby driving the inner gear ring 22 to rotate, and then through The outer gear ring 21 is used for transmission. This structure can realize more complex motion transmission and can withstand larger loads, thereby improving the working stability and reliability of the gear hobbing tool holder assembly. Adjustment components are provided on the surfaces of the rotating shaft 12, the adjusting shaft 16, the rotating shaft 20 and the adjusting shaft 27, so that the driving spur gear 11, the adjusting spur gear 17, the driving spur gear 2 19 and the adjusting spur gear 2 28 can slide on the shaft. This design can flexibly adjust the meshing relationship between the gears according to different processing requirements, thereby changing the transmission ratio and the speed and torque of the tool connecting shaft 9, thereby improving the processing accuracy and flexibility of the gear hobbing tool holder assembly. The front of the tool fixing frame 2 is fixed with a tool replacement frame 4 by a bolt group, and the tool A rotating connecting block 10 is rotatably provided on the side of the disassembly and replacement frame 4 close to the gear hobbing cutter 3, and the rotating connecting block 10 is fixedly connected to the tool connecting shaft 9 by a coupling. This structure makes it possible to easily remove or install the gear hobbing cutter 3 by simply disassembling the tool disassembly and replacement frame 4, thereby improving the efficiency of tool replacement and reducing downtime; a limit electric cylinder 26 is fixedly provided on the front of the fixed side plate 6 located at the rear side, and the back of the planetary carrier 25 is movably engaged with the driving end of the limit electric cylinder 26. The limit electric cylinder 26 can accurately control and limit the position of the planetary carrier 25, ensuring the stability and reliability of the planetary gear structure during operation, preventing the planetary carrier 25 from shaking or displacing, thereby improving the overall working accuracy of the gear hobbing cutter frame assembly.

[0041] Example 2

[0042] In order to realize the sliding setting of the spur gear on the shaft surface in the above embodiment, the structural composition of the adjustment component is explained below by taking the structural adjustment spur gear 28 and the adjustment shaft 27 as examples. The other adjustment components all adopt the same structure; an adjustment frame 30 is fixedly provided on one side of the surface of the adjustment shaft 27, and a plurality of adjustment electric cylinders 31 are fixedly provided inside the adjustment frame 30. A plurality of adjustment connecting holes 32 that cooperate with the driving end of the adjustment electric cylinder 31 are provided on the side of the adjustment spur gear 2 28 close to the adjustment frame 30. The surface of the adjustment shaft 2 27 is provided with an external hexagonal groove at one end for adjusting the sliding adjustment of the spur gear 2 28, and an internal hexagonal groove that cooperates with the external hexagonal groove is provided inside the adjustment spur gear 2 28.

[0043] It should be noted that when the sliding control of the adjusting spur gear 28 on the surface of the adjusting shaft 27 is performed, the driving ends of several adjusting electric cylinders 31 inside the adjusting frame 30 are connected to several adjusting connecting holes 32 on one side of the adjusting spur gear 28, and then the adjusting spur gear 2 28 is driven by several adjusting electric cylinders 31 to slide on the surface of the outer hexagonal groove of the adjusting shaft 27, so that the adjusting spur gear 2 28 and the matching spur gear 2 29 and the outer ring gear 21 are disengaged, thereby releasing the gear transmission between the outer ring gear 21 and the matching spur gear 2 29.

[0044] In a specific embodiment, the present invention provides a stable installation foundation for the adjustment component by fixing the adjustment frame 30 on the adjustment shaft 27. Several adjustment electric cylinders 31 in the adjustment frame 30 can accurately control the extension and contraction of the driving end. After the driving end of the adjustment electric cylinder 31 is connected to the adjustment connecting hole 32 on one side of the adjustment spur gear 28, the adjustment spur gear 28 can be accurately driven to slide on the surface of the adjustment shaft 27 through the extension and contraction action of the adjustment electric cylinder 31. This precise control can meet the fine-tuning requirements of the gear meshing position under different working conditions. For example, when switching between different module gears, the position of the adjustment spur gear 28 can be quickly and accurately adjusted to achieve adaptation to different transmission ratios, thereby improving the accuracy and flexibility of the gear hobbing machine processing; the adjustment connecting hole 32 set on the adjustment spur gear 28 is closely matched with the driving end of the adjustment electric cylinder 31, ensuring the stability of force transmission during the driving process. When the transmission path needs to be changed, such as adjusting the adjustment spur gear 28 and the matching spur gear 29 and the outer ring gear 21, When the gears are disengaged, the adjusting electric cylinder 31 contracts, driving the adjusting spur gear 28 to slide on the surface of the adjusting shaft 27, achieving rapid disengagement and ensuring the reliability of switching between different transmission modes. This design enables the transmission structure to be changed in a timely and accurate manner according to the processing instructions during the operation of the gear hobbing machine, thereby improving the stability and processing efficiency of the equipment operation; the outer hexagonal groove on the surface of the adjusting shaft 27 cooperates with the inner hexagonal groove inside the adjusting spur gear 28. This structure not only ensures that the adjusting spur gear 28 can slide on the adjusting shaft 27, but also ensures synchronous rotation between the two during the sliding process. Compared with ordinary key connections, the cooperation between the outer hexagonal groove and the inner hexagonal groove reduces the transmission instability caused by factors such as keyway wear while ensuring the transmission torque. Moreover, when the adjusting spur gear 28 slides, the outer hexagonal groove and the inner hexagonal groove fit tightly together, making the adjustment process smoother, avoiding the jamming phenomenon caused by the fitting clearance, and further improving the working reliability and service life of the adjustment component.

[0045] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0046] The present invention is not limited to the above optional embodiments. Anyone can derive various other forms of products based on the teachings of the present invention. The above specific embodiments should not be construed as limiting the scope of protection of the present invention. The scope of protection of the present invention shall be based on the scope defined in the claims, and the description can be used to interpret the claims.

Claims

1. A gear hobbing tool holder assembly for a small-module CNC gear hobbing machine, characterized in that: include: An assembly bracket (1) and a tool fixing bracket (2), wherein the tool fixing bracket (2) is fixedly provided on one side of the assembly bracket (1), a gear hobbing cutter (3) is rotatably provided inside the tool fixing bracket (2), a tool dismantling bracket (4) is fixedly provided on the front side of the tool fixing bracket (2) via a bolt group, a rotating connecting block (10) is rotatably provided on the side of the tool dismantling bracket (4) close to the gear hobbing cutter (3), a tool connecting shaft (9) is rotatably provided inside the assembly bracket (1), one end of the tool connecting shaft (9) extends to the inside of the gear hobbing cutter (3), and the back side of the rotating connecting block (10) is fixedly connected to one end of the tool connecting shaft (9) via a coupling; The assembly bracket (1) comprises an assembly mounting frame (5) and a fixed side plate (6), both sides of the assembly mounting frame (5) are fixedly provided with fixed side plates (6) by means of bolt groups, a servo motor 1 (7) is fixedly provided on the front side of the fixed side plate (6) located on the front, and a servo motor 2 (8) is fixedly provided on the back side of the fixed side plate (6) located on the back; a fixed plate (33) is fixedly provided on the left side inside the assembly mounting frame (5), a rotating shaft 1 (12) is rotatably provided on one side of the front side of the fixed plate (33), and the rotating shaft 1 (12) is fixedly provided on the left side inside the assembly mounting frame (5). A driving spur gear (11) is slidably provided on the surface through an adjustment component, and the front end of the rotating shaft (12) is fixedly connected to one end of the output shaft of the servo motor (7) through a coupling; a transmission shaft (14) is rotatably provided on one side of the front face of the fixed plate (33), a transmission spur gear (13) is fixedly provided on the rear side of the surface of the transmission shaft (14), and a transmission spur gear (15) is fixedly provided on the front side of the surface of the transmission shaft (14), and the tooth surface of the transmission spur gear (13) meshes with the tooth surface of the driving spur gear (11) for transmission; The back of the fixed plate (33) is provided with a rotating shaft 2 (20) in rotation, and the surface of the rotating shaft 2 (20) is provided with a driving spur gear 2 (19) in a sliding manner through an adjustment component. One end of the output shaft of the servo motor 2 (8) extends to the interior of the assembly mounting frame (5), and one end of the output shaft of the servo motor 2 (8) is fixedly connected to one end of the rotating shaft 2 (20) through a coupling. One end of the transmission shaft (14) extends to the back of the fixed plate (33), and a sun gear (23) is fixedly provided at the rear end of the transmission shaft (14). Three planetary gears (24) are provided on the back of the fixed plate (33) to rotate around the sun gear (23). The tooth surfaces of the three planetary gears (24) are all meshed with the tooth surfaces of the sun gear (23) for transmission. A limited electric cylinder (26) is fixedly provided on the front of the fixed side plate (6) located at the rear side, and a planetary carrier (25) is provided on the back of the three planetary gears (24) to rotate through a rotating rod. ), the back of the planetary carrier (25) is movably connected to the driving end of the limit electric cylinder (26), the back of the fixed plate (33) is rotatably provided with an inner gear ring (22), the tooth surfaces of the three planetary gears (24) are meshed and driven with an inner gear ring (22), the back of the inner gear ring (22) is fixedly provided with an outer gear ring (21), the tooth surface of the outer gear ring (21) is meshed and driven with the tooth surface of the driving spur gear 2 (19), the fixed plate (3 The back of the tool connecting shaft (3) is rotatably provided with an adjusting shaft 2 (27), and the surface of the adjusting shaft 2 (27) is slidably provided with an adjusting spur gear 2 (28) through an adjusting component, and the tooth surface of the adjusting spur gear 2 (28) is meshed with the tooth surface of the outer gear ring (21) for transmission, and the rear end of the tool connecting shaft (9) is fixedly provided with a matching spur gear 2 (29), and the tooth surface of the matching spur gear 2 (29) is meshed with the tooth surface of the adjusting spur gear 2 (28) for transmission.

2. The gear hobbing tool holder assembly for a small-module CNC gear hobbing machine according to claim 1, characterized in that: An adjusting shaft (16) is rotatably provided on one side of the front face of the fixing plate (33); an adjusting spur gear (17) is slidably provided on the surface of the adjusting shaft (16) through an adjusting assembly; the tooth surface of the adjusting spur gear (17) meshes with the tooth surface of the transmission spur gear (15) for transmission; one end of the tool connecting shaft (9) passes through the fixing plate (33) and extends to the back face of the fixing plate (33); a matching spur gear (18) meshing with the adjusting spur gear (17) is fixedly provided on one side of the surface of the tool connecting shaft (9).

3. The gear hobbing tool holder assembly for a small-module CNC gear hobbing machine according to claim 2, characterized in that: The adjustment assembly comprises: an adjustment frame (30) fixedly arranged on one side of the adjustment shaft surface; a plurality of adjustment electric cylinders (31) fixedly arranged inside the adjustment frame (30); a plurality of adjustment connection holes (32) arranged on one side of the spur gear close to the adjustment frame (30) and matched with the driving end of the adjustment electric cylinder (31); an external hexagonal groove arranged on the surface of the adjustment shaft and used for sliding adjustment of the spur gear; and an internal hexagonal groove arranged inside the spur gear and matched with the external hexagonal groove.

4. The gear hobbing tool holder assembly for a small-module CNC gear hobbing machine according to claim 3, characterized in that: The driving ends of several regulating electric cylinders (31) inside the regulating frame (30) are connected to several regulating connection holes (32) on one side of the spur gear, driving the spur gear to slide on the outer hexagonal groove surface of the regulating shaft for control.

5. The gear hobbing tool holder assembly for a small-module CNC gear hobbing machine according to claim 1, characterized in that: The tool disassembly and replacement frame (4) is fixed to the front of the tool fixing frame (2) via a bolt group and is used for conveniently disassembling and installing the gear hobbing cutter (3).

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