Hobbing tool rest assembly for small-modulus numerical control hobbing machine

Abstract

The invention relates to the technical field of gear transmission, in particular to a hobbing cutter holder assembly for a small-modulus numerical control gear hobbing machine, which comprises an assembly bracket and a cutter fixing frame. By arranging the first servo motor and the second servo motor, various driving modes of the tool connecting shaft are achieved, and the first servo motor can achieve one transmission mode through a gear transmission combination of a first driving straight gear, a first transmission straight gear, a transmission straight gear, a first adjusting straight gear and a first matching straight gear; the second servo motor achieves another transmission mode through cooperation of a planet wheel structure, a planet wheel, an inner gear ring, an outer gear ring, a second adjusting spur gear and a second matching spur gear. In actual machining, an operator can flexibly switch different driving modes according to specific requirements of machined workpieces, such as gear modulus and materials, so that the rotating speed and the torque of the cutter connecting shaft are adjusted, diversified machining requirements are met, and the machining adaptability and the machining capacity of the hobbing cutter rest assembly are improved.

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 numerically controlled gear hobbing machine. Background Art

[0002] Gear hobbing machine is the most widely used type of gear processing machine tool. It can cut spur gears, helical gears, worm gears, sprockets, etc. The gear hobbing tool holder is the most important and complex component of CNC machine tools. Its wide application in high-performance machine tools has not only improved processing efficiency and processing accuracy, reduced production costs, but also driven the rapid development of related industries.

[0003] Most traditional tool holder assemblies have loose structural layouts, and the connection methods between the components are complex and unstable. This not only makes the installation and disassembly process cumbersome, consuming a lot of manpower and time costs, but also, in the long-term use process, due to factors such as mechanical vibration, it is easy to have problems such as loosening and displacement of components, which seriously affects the accuracy of gear hobbing and the reliability of the equipment. For example, some traditional tool holders use non-detachable connection methods such as welding between the bracket and the tool fixing frame. Once a part is damaged, it is extremely difficult to repair, and the tool holder assembly may even need to be replaced as a whole. Traditional gear hobbing tool holder assemblies usually rely on only a single transmission method to drive the tool connection shaft. This single transmission method cannot flexibly adjust the transmission ratio and torque output according to different processing conditions, such as processing gears of different moduli and workpieces of different materials. When processing small-modulus gears, the speed and precision requirements of the tool are extremely high, which are often difficult to meet with the traditional single transmission method, resulting in low precision, poor surface quality and high scrap rate of the processed gears. Summary of the invention

[0004] The invention aims to provide a gear hobbing tool holder assembly for a small-module numerically controlled 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-modulus CNC gear hobbing machine, comprising: an assembly bracket and a tool fixing bracket, a tool fixing bracket is fixedly arranged on one side of the assembly bracket, a gear hobbing cutter is rotatably arranged inside the tool fixing bracket, a tool removal and replacement bracket is fixedly arranged on the front side of the tool fixing bracket through a bolt group, a rotatable connecting block is rotatably arranged on the side of the tool removal and replacement bracket close to the gear hobbing cutter, a tool connecting shaft is rotatably arranged 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 rotatable 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 means of a bolt group, a servo motor 1 is fixedly provided on the front side of the fixed side panel located at the front, and a servo motor 2 is fixedly provided on the back side of the fixed side panel located at the back.

[0007] Preferably, a fixing 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 fixing 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 a servo motor 1 through a coupling; a transmission shaft is rotatably provided on one side of the front face of the fixing 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 meshes 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, an adjusting spur gear 1 is slidably provided on the surface of the adjusting shaft 1 through an adjusting component, the tooth surface of the adjusting spur gear 1 meshes with the tooth surface of the transmission spur gear for transmission, 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 servo motor 2.

[0009] Preferably, a rotating shaft 2 is rotatably provided on the back side of the fixed plate, a driving spur gear 2 is slidably provided on the surface of the rotating shaft 2 via 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 via a coupling.

[0010] Preferably, one end of the rotating shaft 1 extends to the back side of the fixed plate, and a sun gear is fixedly provided at the rear end of the rotating shaft 1, and three planetary gears are arranged on the back side of the fixed plate to 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 and transmission on 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 meshes 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 meshes 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, and matched 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, and matched with the external hexagonal groove.

[0013] Preferably, a plurality of adjusting electric cylinder driving ends inside the adjusting frame are connected to a plurality of adjusting connecting holes on one side of the spur gear, thereby 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 frame is fixed to the front side of the tool fixing frame 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 is connected by a bolt group with an assembly mounting frame and a fixed side plate. This modular and detachable structural design makes the overall layout compact and reasonable. During the installation process, the operator can quickly and accurately assemble the components in place, greatly shortening the installation time. During the equipment maintenance stage, if a component fails, the corresponding fixed side plate can be easily removed to inspect or replace the internal components without large-scale disassembly of the entire tool holder assembly, which greatly improves maintenance efficiency and reduces maintenance costs; when servo motor 1 or servo motor 2 fails, only the bolts on the corresponding fixed side plate need to be removed to remove the motor for repair or replacement.

[0017] 2. By setting 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 to be processed, 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 capacity of the hobbing tool holder assembly.

[0018] 3. Through the application of the planetary gear structure (including the sun gear, planetary gear, inner gear ring, and outer gear ring) in a limited space, the structure can achieve a larger transmission ratio. The sun gear drives the planetary gear to rotate, which in turn drives the inner gear ring to rotate, and then transmits the power through the outer gear ring. This complex motion transmission method can not only achieve efficient power transmission in a smaller space, but also withstand a larger load. When processing large-module gears or workpieces with high cutting force requirements, the planetary gear structure can stably transmit power to the tool connecting shaft, ensuring the smooth progress of the processing process and improving the working stability and reliability of the hobbing tool holder assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. 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 related drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 It is a 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 is a 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 of an embodiment of the present invention;

[0023] Figure 4 is a schematic diagram of the structure of the driving spur gear 2 and the matching spur gear 2 according to an embodiment of the present invention;

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

[0025] Figure 6 Schematic diagram of the structure of a driving spur gear 1 and a matching 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 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 gear ring; 22. inner gear ring; 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 in conjunction with the accompanying drawings and specific embodiments.

[0029] Example 1

[0030] See also Figures 1 to 7 As shown, the present 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 arranged on one side of the assembly bracket 1, and a gear hobbing cutter 3 is rotatably arranged inside the tool fixing bracket 2, a tool dismantling and changing bracket 4 is fixedly arranged on the front side of the tool fixing bracket 2 through a bolt group, and a rotatable connecting block 10 is rotatably arranged on the side of the tool dismantling and changing bracket 4 close to the gear hobbing cutter 3, a tool connecting shaft 9 is also rotatably arranged inside the assembly bracket 1, and one end of the tool connecting shaft 9 extends to the inside of the gear hobbing cutter 3, and the back side of the rotatable connecting block 10 is fixedly connected to one end of the tool connecting shaft 9 through a coupling.

[0031] Specifically, the assembly bracket 1 includes an assembly mounting frame 5 and a fixed side panel 6. The fixed side panels 6 are fixedly provided on both sides of the assembly mounting frame 5 by means of a bolt group, and a servo motor 1 7 is fixedly provided on the front side of the fixed side panel 6 located at the front, and a servo motor 2 8 is fixedly provided on the back side of the fixed side panel 6 located at the back.

[0032] Furthermore, a fixed plate 33 is fixedly provided on the left side inside the assembly mounting frame 5, and a rotating shaft 12 is rotatably provided on one side of the front face of the fixed plate 33, a driving spur gear 11 is slidably provided on the surface of the rotating shaft 12 through an adjusting 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, and 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 also 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.

[0033] 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.

[0034] 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 component, and 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 fixed plate 33 and extends to the back side 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 servo motor 28.

[0035] It should be noted that the number of teeth of the driving spur gear 11, the transmission spur gear 13, the transmission spur gear 15, the adjustment spur gear 17 and the matching spur gear 18 are all different, so that the servo motor 7 can drive the tool connecting shaft 9 through the cooperation of multiple gears with different numbers of teeth.

[0036] Specifically, a rotating shaft 20 is rotatably provided on the back side 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 adjusting component. One end of the output shaft of the servo motor 28 extends to the interior of the assembly mounting frame 5, and one end of the output shaft of the servo motor 28 is fixedly connected to one end of the rotating shaft 20 through a coupling.

[0037] One end of the rotating shaft 12 extends to the back side of the fixed plate 33, and the rear end of the rotating shaft 12 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 meshed with the tooth surfaces of the sun gear 23 for transmission, and a limit electric cylinder 26 is fixedly provided on the front side of the fixed side plate 6 located on the rear side, and a planet 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 planet carrier 25 is movably engaged with the driving end of the limit electric cylinder 26, and an inner gear ring 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 gear ring 22 for transmission, and an outer gear ring 21 is also fixedly provided on the back side of the inner gear ring 22, and the tooth surface of the outer gear ring 21 is meshed with the tooth surface of the driving spur gear 2 19 for transmission.

[0038] An adjusting shaft 27 is 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, and the tooth surface of the adjusting spur gear 28 meshes 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 meshes with the tooth surface of the adjusting spur gear 28 for transmission.

[0039] 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 tool connecting shaft 9 is driven by the meshing transmission between the outer ring gear 21 and the adjusting spur gear 28 and the meshing transmission between the adjusting spur gear 28 and the matching spur gear 29.

[0040] When the tool connecting shaft 9 is driven to rotate by the outer gear ring 21, the output shaft of the servo motor 8 is used to control the rotation of the rotating shaft 20. At this time, the tooth surfaces of the control driving spur gear 2 19 and the outer gear ring 21 are engaged in transmission. At the same time, the outer gear ring 21 drives the matching spur gear 2 29 to rotate synchronously through the adjusting spur gear 2 28 of the meshing transmission, thereby realizing the driving of the tool connecting shaft 9.

[0041] 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 for the tool connecting shaft 9 can be realized. The servo motor 1 7 drives the spur gear 1 11, the transmission spur gear 1 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 coordination of adjusting 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 gear 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 arranged 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 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 side 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 one 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 through a coupling. This structure makes it possible to conveniently remove or install the gear hobbing cutter 3 by only 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 side of the fixed side plate 6 located on the rear side, and the back side 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, thereby ensuring the stability and reliability of the planetary gear structure during operation, preventing the planetary carrier 25 from shaking or displacing, and thus improving the overall working accuracy of the gear hobbing cutter frame assembly.

[0042] Example 2

[0043] 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, and the other adjustment components all adopt the same structure; an adjustment frame 30 is fixedly set on one side of the surface of the adjustment shaft 27, and a plurality of adjustment electric cylinders 31 are fixedly set inside the adjustment frame 30, and a plurality of adjustment connecting holes 32 matching with the driving end of the adjustment electric cylinder 31 are set on the side of the adjustment spur gear 28 close to the adjustment frame 30, and an external hexagonal groove at one end of the surface of the adjustment shaft 27 is used for sliding adjustment of the adjustment spur gear 28, and an internal hexagonal groove matching with the external hexagonal groove is set inside the adjustment spur gear 28.

[0044] 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 28 is driven by several adjusting electric cylinders 31 to perform sliding control on the surface of the outer hexagonal groove of the adjusting shaft 27, so that the adjusting spur gear 28 and the matching spur gear 29 and the outer gear ring 21 are disengaged, thereby releasing the gear transmission between the outer gear ring 21 and the matching spur gear 29.

[0045] 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. The several adjustment electric cylinders 31 in the adjustment frame 30 can accurately control the extension and retraction of the driving end. When 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 retraction 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 modulus 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, thereby ensuring the stability of force transmission during the driving process. When the transmission path needs to be changed, such as allowing the adjustment spur gear 28 and the matching spur gear 29 and the outer gear ring 21 to be adjusted, the adjustment spur gear 28 and the matching spur gear 29 and the outer gear ring 21 to be adjusted. 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 timely and accurately according to the processing instructions during the operation of the gear hobbing machine, thereby improving the stability of the equipment operation and the processing efficiency; 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 the 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 close fit between the outer hexagonal groove and the inner hexagonal groove makes the adjustment process smoother, avoids the jamming phenomenon caused by the matching clearance, and further improves the working reliability and service life of the adjustment component.

[0046] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0047] The present invention is not limited to the above optional implementations, and anyone can derive other various forms of products under the enlightenment of the present invention. The above specific implementations should not be understood as limiting the scope of protection of the present invention. The scope of protection of the present invention should be based on the definition 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 arranged on one side of the assembly bracket (1), a gear hobbing cutter (3) is rotatably arranged inside the tool fixing bracket (2), a tool dismantling bracket (4) is fixedly arranged on the front side of the tool fixing bracket (2) via a bolt group, a rotatable connecting block (10) is rotatably arranged on a side of the tool dismantling bracket (4) close to the gear hobbing cutter (3), a tool connecting shaft (9) is rotatably arranged inside the assembly bracket (1), one end of the tool connecting shaft (9) extends into the interior of the gear hobbing cutter (3), and the back side of the rotatable connecting block (10) is fixedly connected to one end of the tool connecting shaft (9) via a coupling.

2. The gear hobbing tool holder assembly for a small-module CNC gear hobbing machine according to claim 1, characterized in that: The assembly bracket (1) comprises an assembly mounting frame (5) and a fixed side plate (6), the fixed side plates (6) being fixedly arranged on both sides of the assembly mounting frame (5) by means of a bolt group, a servo motor 1 (7) being fixedly arranged on the front side of the fixed side plate (6) located at the front, and a servo motor 2 (8) being fixedly arranged on the back side of the fixed side plate (6) located at the back.

3. The gear hobbing tool holder assembly for a small-module CNC gear hobbing machine according to claim 2, characterized in that: A fixed plate (33) is fixedly arranged on the left side inside the assembly installation frame (5); a rotating shaft (12) is rotatably arranged on one side of the front face of the fixed plate (33); a driving spur gear (11) is slidably arranged on the surface of the rotating shaft (12) through an adjustment component; a front end of the rotating shaft (12) is fixedly connected to one end of an output shaft of a servo motor (7) through a coupling; a transmission shaft (14) is rotatably arranged on one side of the front face of the fixed plate (33); a transmission spur gear (13) is fixedly arranged on the rear side of the surface of the transmission shaft (14); a transmission spur gear (15) is fixedly arranged on the front side of the surface of the transmission shaft (14); a tooth surface of the transmission spur gear (13) meshes with a tooth surface of the driving spur gear (11) for transmission.

4. The gear hobbing tool holder assembly for a small-module CNC gear hobbing machine according to claim 3, characterized in that: An adjusting shaft 1 (16) is rotatably provided on one side of the front face of the fixing plate (33); an adjusting spur gear 1 (17) is slidably provided on the surface of the adjusting shaft 1 (16) through an adjusting assembly; the tooth surface of the adjusting spur gear 1 (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); and a matching spur gear 1 (18) meshing with the adjusting spur gear 1 (17) is fixedly provided on one side of the surface of the servo motor 2 (8).

5. The gear hobbing tool holder assembly for a small-module CNC gear hobbing machine according to claim 2, characterized in that: A second rotating shaft (20) is rotatably provided on the back of the fixed plate (33), and a second driving spur gear (19) is slidably provided on the surface of the second rotating shaft (20) via an adjustment assembly. One end of the output shaft of the second servo motor (8) extends into the interior of the assembly mounting frame (5), and one end of the output shaft of the second servo motor (8) is fixedly connected to one end of the second rotating shaft (20) via a coupling.

6. The gear hobbing tool holder assembly for a small-module CNC gear hobbing machine according to claim 5, characterized in that: One end of the rotating shaft (12) extends to the back side of the fixed plate (33); a sun gear (23) is fixedly arranged at the rear end of the rotating shaft (12); three planetary gears (24) are arranged on the back side of the fixed plate (33) to rotate around the sun gear (23); the tooth surfaces of the three planetary gears (24) are meshed with the tooth surfaces of the sun gear (23) for transmission; a limit electric cylinder (26) is fixedly arranged on the front side of the fixed side plate (6) located at the rear side; the tooth surfaces of the three planetary gears (24) are meshed with the tooth surfaces of the sun gear (23) for transmission; A planetary carrier (25) is rotatably arranged on the back side through a rotating rod, the back side of the planetary carrier (25) is movably engaged with the driving end of the limit electric cylinder (26), an inner gear ring (22) is rotatably arranged on the back side of the fixed plate (33), the tooth surfaces of the three planetary gears (24) are meshed and driven with the inner gear ring (22), an outer gear ring (21) is fixedly arranged on the back side of the inner gear ring (22), and the tooth surface of the outer gear ring (21) is meshed and driven with the tooth surface of the second driving spur gear (19).

7. The gear hobbing tool holder assembly for a small-module CNC gear hobbing machine according to claim 6, characterized in that: The back side of the fixed plate (33) is rotatably provided with an adjusting shaft (27), and the surface of the adjusting shaft (27) is slidably provided with an adjusting spur gear (28) through an adjusting assembly, and the tooth surface of the adjusting spur gear (28) meshes 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 (29), and the tooth surface of the matching spur gear (29) meshes with the tooth surface of the adjusting spur gear (28) for transmission.

8. A gear hobbing tool holder assembly for a small-module CNC gear hobbing machine according to any one of claims 1 to 7, 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 drive 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.

9. The gear hobbing tool holder assembly for a small-module CNC gear hobbing machine according to claim 8, characterized in that: The driving ends of a plurality of adjusting electric cylinders (31) inside the adjusting frame (30) are connected to a plurality of adjusting connecting holes (32) on one side of the spur gear, thereby driving the spur gear to slide on the surface of the outer hexagonal groove of the adjusting shaft for control.

10. 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 side of the tool fixing frame (2) by means of a bolt group, and is used for conveniently disassembling and installing the gear hobbing cutter (3).

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