A high efficiency gear hobbing machine

Abstract

The application discloses a high-efficiency gear hobbing machine and belongs to the technical field of gear hobbing machines. Mainly including machine tool main body, deburring assembly, driving displacement assembly and covering assembly. The deburring assembly includes an annular sleeve box and a milling disc which can slide axially along the boss; the covering assembly includes an arc-shaped cover arranged at the clamp base and a driving top shaft. The application drives the hobbing cutter frame stroke through the driving displacement assembly, drives the annular sleeve box to displace upward, uses the driving top shaft loaded by the annular sleeve box to push the arc-shaped cover to execute the starting operation, makes the milling disc exposed and close to the bottom surface of the gear to be processed, and synchronously executes the rotation cutting in the hobbing return stage. The application realizes the automatic avoidance, dynamic protection and online cleaning of the deburring mechanism by using the mechanical linkage logic, effectively removes the plastic flow deburring of the gear bottom, guarantees that the precise components are not interfered by the cutting chips, and improves the machining efficiency and the bottom surface cleanliness.

Description

Technical Field

[0001] This invention relates to the field of gear hobbing machine technology, and in particular to a high-efficiency gear hobbing machine. Background Technology

[0002] Gear hobbing is one of the most commonly used cutting processes in gear manufacturing. Traditional CNC gear hobbing machines typically use the linkage rotation of the hob shaft and the workpiece shaft, combined with the longitudinal feed of the hob holder along the workpiece axis to achieve gear machining. In actual production, the industry mostly uses a downward feed climb milling method. In this type of machine tool, during the machining process, the hob holder starts from the top of the gear to be machined and gradually moves downward as the gear rotates until it cuts through the bottom edge of the gear.

[0003] However, in existing gear hobbing processes, when the hob holder feeds downwards to the bottom end face of the workpiece, the material loses its physical support from below the cutting edge the instant it exits. This causes the cutting force to change from localized shearing to extrusion, resulting in plastic flow of the material and leaving extrusion burrs on the bottom end face of the gear. Currently, these extrusion burrs are mostly removed manually or through offline secondary processing in industrial settings. Because the burrs are unevenly distributed and firmly connected at the root, manual operation is not only labor-intensive but also prone to causing scratches on the end face or exceeding the dimensional tolerances of the gear chamfer due to inconsistent scraping force, making it difficult to meet the product consistency requirements of highly flexible automated production lines.

[0004] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Summary of the Invention

[0005] This invention provides a high-efficiency gear hobbing machine to solve the technical problems of plastic flow and extrusion burrs caused by material loss of support when climbing to the bottom exit in existing gear hobbing processes, and the low efficiency and poor processing consistency of traditional manual or offline deburring methods.

[0006] The present invention adopts the following technical solution: a high-efficiency gear hobbing machine. It includes a machine tool body, which is provided with a machine tool base. A worktable base is provided on the machine tool base, and a fixture base is vertically fixed on the worktable base. A boss is provided on the top of the fixture base, and a rotating turntable for supporting the workpiece is provided at the boss. A deburring assembly includes an annular sleeve that can slide along the axial direction of the boss, and a milling disc disposed above the annular sleeve. The surface of the milling disc is provided with a plurality of scraping and holding elements for cutting burrs and a ramp for guiding chips outward. The covering assembly includes an arc-shaped cover disposed at the fixture base and a drive top shaft that is linked to the annular sleeve. A drive displacement assembly is disposed inside the fixture base and is connected to the annular sleeve via a transmission connection. The drive displacement component is configured to drive the annular sleeve to move upward, and the drive top shaft loaded by the annular sleeve pushes the arc-shaped cover to perform an opening action, so as to expose the milling disk so that it is close to the bottom surface of the gear to be processed and perform a rotation cleaning action, and guide the stripped burrs to the chip removal path through the ramp.

[0007] Furthermore, the deburring assembly includes an annular sleeve, a bearing component, and an inner ring gear; the annular sleeve is vertically slidably fitted onto the outer periphery of the boss, the surface of the boss is provided with a plurality of vertically oriented embedding grooves, the inner wall of the annular sleeve is fixedly provided with a pin block embedded in the embedding groove of the surface of the boss, and the inner ring gear is rotatably disposed on the inner wall of the annular sleeve through the bearing component.

[0008] Furthermore, a return spring is connected between the bottom surface of the pin block and the bottom surface of the inner wall of the embedding groove. The return spring is configured to release preload energy and apply an axial downward pulling force to the pin block when the drive displacement assembly performs a descent avoidance or stops the lifting action. This drives the annular sleeve to move the pin block downward along the vertical trajectory of the embedding groove to reset. During the upward sliding driven by the drive displacement assembly, the return spring is passively stretched and cooperates with the side wall of the embedding groove to restrict the circumferential rotation of the pin block, thereby forcibly constraining the annular sleeve to only perform linear reciprocating lifting and lowering actions along the axial direction of the boss.

[0009] Furthermore, the deburring assembly also includes a support cover coaxially sleeved on the boss, the top surface of the inner ring gear has several upward-opening movable slots, the bottom of the support cover is fixed with several vertically downward support rods, the end of each support rod is slidably embedded in the corresponding movable slot, so as to realize the synchronous rotation drive of the inner ring gear on the support cover; the milling disc is fixedly set at the top outlet end of the support cover.

[0010] Furthermore, a buffer spring is connected between the end of each support rod and the bottom of the inner wall of the movable groove. The buffer spring is configured such that when the milling disc moves upward with the annular sleeve and touches the bottom surface of the workpiece, the axial micro-movement of the support rod in the movable groove generates elastic relief compensation, so as to maintain a constant scraping pressure on the bottom surface of the gear to be machined by the milling disc and absorb axial vibration during the cutting process.

[0011] Furthermore, the drive displacement assembly includes a base plate, two mounting seats, a rotating grooved wheel, and a servo motor. The base plate is vertically fixed to the bottom of the inner wall of the fixture base. The two mounting seats are symmetrically arranged on the base plate. The rotating grooved wheel is rotatably disposed between the two sets of mounting seats. The output end of the servo motor is connected to the rotating grooved wheel. The outer circumferential surface of the rotating grooved wheel has a closed spatial curved groove, and a follower pin is embedded in the spatial curved groove. The follower pin is connected to a driven slider, so that the rotating grooved wheel is continuously rotated by the servo motor, thereby driving the driven slider to perform reciprocating lifting motion in the vertical direction.

[0012] Furthermore, the drive displacement assembly also includes a servo motor, a U-shaped linkage fork, and a lifting transmission rod; two guide rods are symmetrically fixed between the two sets of mounting seats, the driven slider slides through the two guide rods to constrain deflection, the U-shaped linkage fork spans the side of the driven slider and is rigidly connected to the bottom end of the lifting transmission rod, and the top end of the lifting transmission rod passes through the internal space of the clamp base and contacts the bottom surface of the annular sleeve for transmission.

[0013] Furthermore, the drive displacement assembly also includes a keyway rod coaxially and fixedly connected to the rotating grooved wheel and a drive gear meshing with the inner ring gear. The drive gear bearing is disposed on the bottom surface of the inner wall of the annular sleeve, and its shaft hole is provided with a keyway that cooperates with the keyway rod to form a sliding spline pair. During the axial displacement of the annular sleeve driven by the lifting transmission rod, the drive gear performs a synchronous rotation action with the keyway rod and slides axially along the keyway rod to maintain the meshing state with the inner ring gear during the lifting process.

[0014] Furthermore, the covering assembly also includes several sets of right-angle frames fixed to the outer wall surface of the fixture base. Each right-angle frame is connected to an arc-shaped cover by a hinge. Several arc-shaped covers are spliced ​​together in the initial closed state to form a trumpet-shaped protective structure covering the milling disc.

[0015] Furthermore, the drive top shaft includes several mounting brackets fixed to the outer periphery of the annular sleeve, and a vertical top rod fixed to the surface of each mounting bracket. The vertical top rod rises synchronously with the annular sleeve, and its end is configured to press against and push the arc-shaped cover upward to flip open around the hinge.

[0016] The above-mentioned technical solution adopted in this invention can achieve the following beneficial effects: A high-efficiency gear hobbing machine integrates a drive displacement component inside the fixture base, which is linked to a deburring component fitted around the outer periphery of the boss. This successfully achieves online automatic cleaning during the return stroke of the gear hobbing process. The drive displacement component drives the annular sleeve to move upward, which not only allows the milling disc to rotate and cut close to the bottom surface of the workpiece to remove plastic burrs, but also simultaneously pushes the arc-shaped cover of the covering component through the drive top shaft loaded by the annular sleeve to open the milling disc and guide the waste chips out using the slope of its surface. This solution effectively solves the technical problem that traditional gear hobbing machines cannot simultaneously protect the precision deburring mechanism and automate cleaning. By using mechanical linkage logic to replace manual cleaning, it improves processing efficiency and the cleanliness of the gear bottom surface while ensuring that the milling disc is not disturbed by flying chips. Attached Figure Description

[0017] The accompanying drawings, which are provided to further illustrate the invention and constitute a part of this invention, are illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention.

[0018] In the attached diagram: Figure 1 This is an overall schematic diagram of a high-efficiency gear hobbing machine according to this application; Figure 2 for Figure 1 A partial structural diagram; Figure 3 for Figure 2 Schematic diagram of the structure of the mid-coverage component under coverage state; Figure 4 This is a structural diagram of the covered component in its unfolded state. Figure 5 for Figure 4 A magnified structural diagram at point A; Figure 6 for Figure 3 A partial structural diagram; Figure 7 for Figure 6 A magnified structural diagram at point B; Figure 8 for Figure 4 A magnified structural diagram at point C; Figure label: 1. Machine tool body; 12. Machine tool base; 13. Worktable base; 14. Fixture base; 141. Boss; 15. Rotary table; 16. Z-axis guide rail support; 161. Follower center; 17. Hob holder slide; 18. Hob spindle; 19. Hob drive motor; 110. Hob holder body; 2. Operating door; 3. Deburring assembly; 31. Annular sleeve; 32. Bearing components; 33. Inner ring gear; 34. Support cover; 341. Support rod; 35. Milling disc 351. Ramp; 352. Scraper; 311. Pin; 4. Drive displacement assembly; 41. Base plate; 411. Mounting seat; 42. Rotating grooved wheel; 43. Driven slider; 44. Guide rod; 45. Servo power motor; 46. U-shaped linkage fork; 47. Lifting transmission rod; 48. Keyway rod; 49. Drive gear; 5. Cover assembly; 51. Right angle bracket; 52. Torsion spring hinge; 54. Mounting bracket; 55. Vertical top rod; 56. Arc-shaped cover. Detailed Implementation

[0019] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0020] The technical solutions provided by the various embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0021] Reference Figures 1-8 As shown, the present invention provides a high-efficiency gear hobbing machine, mainly including a machine tool body 1, which provides a high-precision cutting space and a stable support for the overall machine structure; a deburring assembly 3, which is used to fit against the bottom surface of the gear and perform rotary cutting during the hob return phase to remove plastic flow burrs; a drive displacement assembly 4, which is used to realize the axial reciprocating lifting of the deburring mechanism and simultaneously provide rotational power; and a cover assembly 5, which is used to shield the precision components during gear hobbing and is controlled to open during the deburring phase to make room for processing. The machine tool body 1 has a machine tool base 12, and a worktable base 13 is horizontally arranged on the upper surface of the machine tool base 12 to support the entire processing load. A fixture base 14 is vertically fixed on the worktable base 13. The fixture base 14 is the core support component of the workpiece clamping system. A boss 141 is integrally provided on its top. A rotary table 15 is provided at the center of the boss 141. The rotary table 15 is arranged through the top of the fixture base 14 and the top of the boss 141 in sequence and is connected to the drive component arranged inside the fixture base 14. The rotary table 15 is used to support and drive the gear blank to be processed to perform the rotational motion required for cutting.

[0022] An operating door 2 is slidably provided on the machine tool body 1. The operating door 2 is used to open or close the machining area and prevent coolant and chips from splashing during machining. A Z-axis guide rail support 16 is vertically provided on one side of the inner wall of the machine tool body 1. It provides precision guide support for the longitudinal feed of the hob. A tailstock slide (not shown in the figure) slides on the Z-axis guide rail support 16. A follower tip 161 is provided at the cantilever end of the tailstock slide. The follower tip 161 is located directly above the rotary table 15 and is configured to be hydraulically driven to move downward before machining begins. Its conical end is inserted into the center hole of the gear blank, thereby clamping the gear blank from the top. It works with the rotary table 15 at the bottom to achieve bidirectional axial centering and clamping stability of the workpiece during high-speed rotary cutting.

[0023] Furthermore, a hob holder slide 17 is slidably provided on a lifting guide rail on the other side of the inner wall of the machine tool body 1. A hob holder body 110 is installed on the hob holder slide 17, and a hob spindle 18 is provided inside the hob holder body 110. A hob drive motor 19 is also provided on the hob holder slide 17, which serves as the main cutting power source and drives the hob on the hob spindle 18 to rotate and cut through the transmission pair.

[0024] In the actual machining cycle, the hob is fed downward along the Z-axis guide rail support 16 with the hob holder slide 17. When the hob cuts to the bottom end exit position of the workpiece, its position feedback signal will synchronously trigger the drive displacement component 4 located inside the fixture base 14, thereby controlling the deburring component 3 and the cover component 5 below to perform corresponding linkage avoidance or scraping actions.

[0025] like Figures 6-8 As shown, in order to fit the bottom surface of the gear and perform rotary cutting during the return stroke of the hob, the deburring assembly 3 includes an annular sleeve 31. The annular sleeve 31 is vertically slidably sleeved on the outer periphery of the boss 141. In order to achieve axial guidance and restrict circumferential rotation, a number of vertically oriented embedding grooves are provided on the surface of the boss 141. A pin block 311 embedded in the embedding groove is fixed on the inner wall of the annular sleeve 31. A return spring (not shown in the figure) is connected between the bottom surface of the pin block 311 and the bottom surface of the inner wall of the embedding groove.

[0026] When the drive displacement assembly 4 stops lifting or performs an avoidance action, the reset spring releases its preload energy and applies a downward pulling force to the pin 311, driving the annular sleeve 31 to slide down and reset along the vertical trajectory of the embedded groove. During the upward sliding, the reset spring is passively stretched and cooperates with the side wall of the embedded groove to restrict the rotation of the pin 311, forcibly constraining the annular sleeve 31 to only perform linear lifting and lowering actions along the axis of the boss 141.

[0027] Continue to refer to, for example Figures 6-8As shown, an inner ring gear 33 is rotatably mounted inside the annular sleeve 31 via a bearing 32. The deburring assembly 3 also includes a support cover 34 coaxially mounted on the boss 141. The top surface of the inner ring gear 33 has several upward-opening movable slots. Several vertically downward support rods 341 are fixedly mounted at the bottom of the support cover 34. The end of each support rod 341 is slidably embedded in the corresponding movable slot, thereby realizing the synchronous rotation drive of the inner ring gear 33 on the support cover 34. A milling disc 35 is fixedly mounted at the top outlet end of the support cover 34. The surface of the milling disc 35 is provided with several scraping and holding parts 352 for cutting burrs and ramps 351 for guiding chips outward. In addition, a buffer spring (not shown in the figure) is connected between the end of each support rod 341 and the bottom surface of the movable slot. When the milling disc 35 moves upward with the annular sleeve 31 and touches the bottom surface of the workpiece, the support rod 341 performs axial displacement in the movable slot to generate elastic relief compensation, maintain constant scraping pressure and absorb cutting vibration.

[0028] like Figures 3-5 As shown, a drive displacement assembly 4 for driving the deburring mechanism is provided inside the fixture base 14. The drive displacement assembly 4 includes a base plate 41 fixed at the bottom of the inner wall of the fixture base 14, two mounting seats 411 symmetrically arranged on the base plate 41, a rotating groove wheel 42 connected between the two mounting seats 411 by a rotating bearing, and a servo motor 45 for providing power.

[0029] The servo motor 45 is fixed inside the bottom surface of the fixture base 14, and its output end is connected to the rotating groove wheel 42 for transmission. The outer periphery of the rotating groove wheel 42 is provided with a closed spatial curved groove. A follower pin is embedded in the spatial curved groove, and a driven slider 43 is fixed on the follower pin. At the same time, two vertically arranged guide rods 44 are fixed between the two mounting seats 411. The driven slider 43 is slidably sleeved on the two guide rods 44. The servo motor 45 drives the rotating groove wheel 42 to rotate, and the driven slider 43 is driven to perform controlled reciprocating lifting and lowering motion along the guide rods 44 by the trajectory of the spatial curved groove.

[0030] Furthermore, the drive displacement assembly 4 also includes a U-shaped linkage fork 46 and a lifting transmission rod 47. The U-shaped linkage fork 46 is fixed to the side of the driven slider 43, and the bottom end of the lifting transmission rod 47 is rigidly connected to the U-shaped linkage fork 46. The top end of the lifting transmission rod 47 passes upward through the internal space of the clamp base 14 and contacts the bottom surface of the annular sleeve 31. Thus, through the linear reciprocating motion of the driven slider 43, power is transmitted to the deburring assembly 3 via the lifting transmission rod 47, achieving the axial lifting and lowering of the annular sleeve 31.

[0031] To achieve rotational power transmission, the drive displacement assembly 4 also includes a keyway rod 48 coaxially fixedly connected to the rotating grooved wheel 42. The keyway rod 48 passes upward through the internal space of the fixture base 14 and is fixed with a drive gear 49. The drive gear 49 is bearing a bearing on the bottom surface of the inner wall of the annular sleeve 31 and meshes with the inner ring gear 33. The shaft hole of the drive gear 49 and the keyway rod 48 cooperate to form a sliding spline pair. In the actual operation cycle, the servo power motor 45 first drives the drive gear 49 to perform rotational action through the keyway rod 48, thereby driving the inner ring gear 33 and the milling disk 35 to rotate.

[0032] During this rotation, the annular sleeve 31 is driven by the lifting transmission rod 47 to perform axial lifting displacement, while the drive gear 49, due to its axial limitation within the annular sleeve 31, rises synchronously with the annular sleeve 31 and performs axial sliding along the axis of the keyway rod 48. This sliding spline fit ensures that the deburring assembly 3 can always maintain stable power transmission coupling with the drive displacement assembly 4 during the complex lifting and reciprocating motion, thereby realizing the continuous rotation and cleaning of the milling disc 35.

[0033] like Figures 3-4 and Figure 8 As shown, the device is also provided with a cover assembly 5 for protecting the deburring. The cover assembly 5 includes several right-angle brackets 51 fixed to the outer wall surface of the fixture base 14, an arc-shaped cover 56 movably connected to one end of the right-angle brackets 51 via a torsion spring hinge 52, and a drive top shaft provided on the deburring assembly 3.

[0034] Specifically, the vertical section of each set of right-angle brackets 51 extends outward to the periphery of the milling disk 35. Several arc-shaped covers 56 hang downward under the action of torsion spring hinges 52 in the initial closed state and are spliced ​​together to form a trumpet-shaped protective structure that is narrow at the top and wide at the bottom. This structure covers the top of the milling disk 35 to guide the high-pressure cutting fluid and splashed iron chips generated during the gear hobbing process and prevent them from entering the deburring assembly 3.

[0035] Furthermore, the drive shaft includes several sets of mounting brackets 54 fixed to the outer periphery of the annular sleeve 31, and vertical push rods 55 fixed to the top surface of each mounting bracket 54. The vertical push rods 55 move axially synchronously with the annular sleeve 31, and the top of the vertical push rods 55 is located exactly on the inner force-bearing surface of the lower edge of the arc-shaped cover 56.

[0036] When the drive displacement component 4 drives the annular sleeve 31 to perform an upward cleaning stroke, the vertical push rod 55 rises synchronously, and its end directly abuts and pushes the inner wall of the arc-shaped cover 56. Since the arc-shaped cover 56 is axially constrained by the torsion spring hinge 52, it flips outward and upward around the hinge point under the action of the pushing force. As the arc-shaped cover 56 opens, the milling disc 35 is fully exposed and continues to rise until it is close to the bottom surface of the gear to be processed for cleaning. When the cleaning is completed and the annular sleeve 31 descends and resets, the vertical push rod 55 is withdrawn, and the arc-shaped cover 56 closes and resets again under the action of the torsion spring, forming a protective state again.

[0037] Working principle: Before the machining cycle begins, the operator places the gear blank on the rotary table 15. The follower center 161 moves downward along the Z-axis guide rail support 16 under hydraulic drive, pressing against the center hole at the top of the blank. Together with the rotary table 15 at the bottom, it completes the axial centering and stable clamping of the workpiece. At this time, the deburring assembly 3 is in the initial clearance position below, and the several arc-shaped protective covers 56 of the covering assembly 5 are closed under the preload of the torsion spring hinge 52, forming a trumpet-shaped protective shield to shield the milling disc 35. Subsequently, the hob drive motor 19 drives the hob to rotate at high speed, and the hob holder slide 17 drives the hob to feed downward along the Z-axis to perform hobbing. During this process, the trumpet-shaped protective structure effectively guides the high-pressure cutting fluid and splashed iron chips, ensuring that the precision deburring mechanism is not impacted by impurities and maintaining the initial cleanliness of the system.

[0038] After the hob is fed to the exit position at the bottom of the gear and completes the tooth cutting, the displacement component 4 is activated by a limit switch on the Z-axis or a servo drive signal linked to the CNC system. The servo motor 45 starts and drives the rotating grooved wheel 42 to rotate. The spatial curve groove on its surface forces the driven slider 43 to slide upward along the guide rod 44. The driven slider 43 drives the lifting transmission rod 47 to rise vertically through the U-shaped linkage fork 46, thereby pushing the annular sleeve 31. During the rise of the annular sleeve 31, the vertical push rod 55 fixed on it moves upward synchronously and abuts against the inner force-bearing surface of the arc-shaped cover 56. As the pushing force is continuously applied, the arc-shaped cover 56 overcomes the torsion spring force and flips outward and upward around the hinge point, revealing the previously covered milling disc 35, which continues to rise until it is close to the bottom surface of the gear to be processed. This linkage logic ensures precise phase matching between the deburring action and the hob return stroke, achieving seamless connection.

[0039] As the annular sleeve 31 is lifted, the power of the rotating grooved wheel 42 is transmitted to the drive gear 49 through the coaxial keyway rod 48. Since the drive gear 49 is engaged with the keyway rod 48 through a sliding spline pair, it can stably receive torque and drive the inner ring gear 33 to rotate while sliding axially with the annular sleeve 31. The inner ring gear 33 drives the milling disc 35 to rotate at high speed via the support rod 341. The scraper 352 on the milling disc 35 performs cutting and cleaning on the plastic burrs at the bottom of the gear. At this time, the buffer spring at the bottom of the support rod 341 ensures that the milling disc 35 maintains a constant scraping pressure on the bottom surface of the workpiece through slight axial displacement compensation. After the cleaning cycle ends, the rotating grooved wheel 42 rotates to the reset stroke, the lifting transmission rod 47 moves downward, and the annular sleeve 31 quickly retracts to its original position under the tension of the reset spring. As the vertical push rod 55 is withdrawn, the arc-shaped cover 56 automatically closes under the action of the torsion spring, re-entering the protective state, completing a complete deburring cycle.

[0040] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A high-efficiency gear hobbing machine, characterized in that, include The machine tool body (1) is provided with a machine tool base (12), a worktable base (13) is provided on the machine tool base (12), a fixture base (14) is vertically fixed on the worktable base (13), a boss (141) is provided on the top of the fixture base (14), and a rotating turntable (15) supporting the blank is provided at the boss (141). The deburring assembly (3) includes an annular sleeve (31) that can slide along the axial direction of the boss (141), and a milling disc (35) disposed above the annular sleeve (31). The surface of the milling disc (35) is provided with a plurality of scraper holders (352) for cutting burrs and a ramp (351) for guiding chips outward. The cover assembly (5) includes an arc-shaped cover (56) disposed at the clamp base (14) and a drive top shaft that is linked to the annular sleeve (31); A drive displacement assembly (4) is disposed inside the clamp base (14) and is connected in a transmission manner to the annular sleeve (31); The drive displacement component (4) is configured to drive the annular sleeve (31) to move upward, and the drive top shaft loaded by the annular sleeve (31) pushes the arc-shaped cover (56) to perform an opening action, so as to expose the milling disk (35) so that it is close to the bottom surface of the gear to be processed and performs a rotation cleaning action, and guides the stripped burrs to the chip removal path through the ramp (351).

2. The high-efficiency gear hobbing machine according to claim 1, characterized in that: The deburring assembly (3) includes an annular sleeve (31), a bearing (32), and an inner ring gear (33). The annular sleeve (31) is vertically slidably sleeved on the outer periphery of the boss (141). The surface of the boss (141) is provided with several vertically oriented embedding grooves. The inner wall of the annular sleeve (31) is fixedly provided with a pin (311) embedded in the embedding groove on the surface of the boss (141). The inner ring gear (33) is rotatably disposed on the inner wall of the annular sleeve (31) through the bearing (32).

3. The high-efficiency gear hobbing machine according to claim 2, characterized in that: A reset spring is connected between the bottom surface of the pin (311) and the bottom surface of the inner wall of the embedding groove. The reset spring is configured to release preload energy and apply an axial downward pulling force to the pin (311) when the drive displacement assembly (4) performs a descent avoidance or a stop lifting action. This drives the annular sleeve (31) to move the pin (311) downward along the vertical trajectory of the embedding groove to reset. During the upward sliding driven by the drive displacement assembly (4), the reset spring is passively stretched and cooperates with the side wall of the embedding groove to restrict the circumferential rotation of the pin (311) so as to forcibly constrain the annular sleeve (31) to only perform linear reciprocating lifting and lowering actions along the axial direction of the boss (141).

4. The high-efficiency gear hobbing machine according to claim 2, characterized in that: The deburring assembly (3) also includes a support cover (34) coaxially sleeved on the boss (141). The top surface of the inner ring gear (33) is provided with several upward-opening movable slots. The bottom of the support cover (34) is fixedly provided with several vertically downward support rods (341). The end of each support rod (341) is slidably embedded in the corresponding movable slot to realize the synchronous rotation drive of the inner ring gear (33) on the support cover (34). The milling disc (35) is fixedly set at the top outlet end of the support cover (34).

5. A high-efficiency gear hobbing machine according to claim 4, characterized in that: Each of the support rods (341) is connected to a buffer spring between its end and the bottom of the inner wall of the movable groove. The buffer spring is configured such that when the milling disc (35) moves upward with the annular sleeve (31) and touches the bottom surface of the workpiece, the axial micro-movement of the support rod (341) in the movable groove generates elastic relief compensation, so as to maintain a constant scraping pressure of the milling disc (35) on the bottom surface of the gear to be machined and absorb axial vibration during the cutting process.

6. A high-efficiency gear hobbing machine according to claim 2, characterized in that: The drive displacement assembly (4) includes a base plate (41), two mounting seats (411), a rotating grooved wheel (42), and a servo motor (45). The base plate (41) is vertically fixed to the bottom of the inner wall of the fixture base (14). The two mounting seats (411) are symmetrically arranged on the base plate (41). The rotating grooved wheel (42) is rotatably arranged between the two sets of mounting seats (411). The output end of the servo motor (45) is connected to the rotating grooved wheel (42) for transmission. The outer circumferential surface of the rotating grooved wheel (42) is provided with a closed spatial curve groove, and a follower pin is embedded in the spatial curve groove. The follower pin is connected to a driven slider (43) so that the rotating grooved wheel (42) can be continuously rotated by the servo motor (45), thereby driving the driven slider (43) to perform reciprocating lifting motion in the vertical direction.

7. A high-efficiency gear hobbing machine according to claim 6, characterized in that: The drive displacement assembly (4) also includes a servo motor (45), a U-shaped linkage fork (46), and a lifting transmission rod (47); two guide rods (44) are symmetrically fixed between the two sets of mounting seats (411), the driven slider (43) slides through the two guide rods (44) to constrain deflection, the U-shaped linkage fork (46) spans the side of the driven slider (43) and is rigidly connected to the bottom end of the lifting transmission rod (47), the top end of the lifting transmission rod (47) passes through the internal space of the clamp base (14) and contacts the bottom surface of the annular sleeve (31) for transmission.

8. A high-efficiency gear hobbing machine according to claim 7, characterized in that: The drive displacement assembly (4) further includes a keyway rod (48) coaxially fixedly connected to the rotating grooved wheel (42) and a drive gear (49) meshing with the inner ring gear (33). The drive gear (49) is bearing disposed on the bottom surface of the inner wall of the annular sleeve (31), and its shaft hole is provided with a keyway that cooperates with the keyway rod (48) to form a sliding spline pair. During the axial displacement of the annular sleeve (31) driven by the lifting transmission rod (47), the drive gear (49) rotates synchronously with the keyway rod (48) and slides axially along the keyway rod (48) to maintain the meshing state with the inner ring gear (33) during the lifting process.

9. A high-efficiency gear hobbing machine according to claim 1, characterized in that: The covering assembly (5) also includes several sets of right-angle brackets (51) fixed to the outer wall surface of the clamp base (14). Each right-angle bracket (51) is connected to an arc-shaped cover (56) by a torsion spring hinge (52). Several arc-shaped covers (56) are spliced ​​together in the initial closed state to form a trumpet-shaped protective structure covering the milling disc (35).

10. A high-efficiency gear hobbing machine according to claim 9, characterized in that: The drive shaft includes a plurality of mounting brackets (54) fixed to the outer periphery of the annular sleeve (31), and a vertical push rod (55) fixed to the surface of each mounting bracket (54). The vertical push rod (55) rises synchronously with the annular sleeve (31), and its end is configured to press against and push the arc-shaped cover (56) upward around the torsion spring hinge (52) to flip open upward.

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