High-efficiency workpiece automatic locking mechanism for gear hobbing machine

Abstract

The utility model belongs to the workpiece fixing technical field of gear hobbing machine, and disclose a kind of high -efficient workpiece automatic locking mechanism for gear hobbing machine, realize workpiece automatic fastening and follow-up processing using the tailstock hydraulic system of machine self, solve the shortcomings of low efficiency of traditional manual fixing operation and difficult to control the fastening force of nut, with the tailstock hydraulic system of gear hobbing machine, push movable rotary needle and the movement of connected components, make docking pressure head compress workpiece, and the quantitative control of compressing force, avoid the drawbacks of traditional mode;Through the bearing housing and the rotating connection fitting design, realize the synchronous rotation of docking pressure head, pressure head shaft and workpiece, while maintaining constant compressing force, without affecting the subsequent operation of workpiece. The mechanism does not need additional complex power system, which not only improves efficiency and reduces operation requirements, but also adapts to processing needs, provides key support for the automation transformation of gear hobbing machine, and has remarkable practicality.

Description

Technical Field

[0001] This utility model relates to the field of workpiece fixing technology for gear hobbing machines, specifically a high-efficiency automatic workpiece locking mechanism for gear hobbing machines. Background Technology

[0002] Currently, semi-automatic gear hobbing machines generally use the traditional method of threaded nut locking to fix the workpiece to be processed. This process requires full manual intervention: First, the operator must precisely place the annular or cylindrical workpiece onto the machine tool's spindle, ensuring coaxiality between the workpiece and the spindle. Since the core of this fixing method lies in the threaded connection, the surface of the machine tool's spindle is pre-machined with external threads, and the matching fastening nut has a matching internal thread. After the workpiece is placed, the operator must manually tighten the nut with a wrench or similar tool. Through the threaded engagement between the nut and the spindle, the workpiece is pressed firmly onto the positioning surface of the machine tool's spindle until the desired fixing effect is achieved. Only then can the gear hobbing machine be started for gear machining. After a single workpiece is processed, the nut must be manually tightened again in the opposite direction to release the fixation and remove the workpiece, completing one machining cycle. This traditional fixing method has several significant drawbacks that severely impact production operations: First, it is extremely slow and inefficient. The entire fixing and disassembly process relies on manual operation, and tightening the nuts consumes a considerable amount of time. Especially in batch processing scenarios, frequent manual operation significantly extends the workpiece turnaround time, reducing the effective processing time of the gear hobbing machine and making it difficult to meet the cycle time requirements of large-scale production. Second, it places high demands on operator skills. The control of the tightening force of the nuts depends entirely on the operator's experience. If the operator is not skilled or makes a mistake in judgment, problems such as inadequate fixing or over-tightening can easily occur. This not only increases the training cost for new employees but also leads to inconsistent fixing of different workpieces due to differences in human operation, affecting the stability of processing accuracy. Third, controlling the fastening force is difficult and poses a double risk: if the fastening force is too small, the workpiece will not be firmly fixed, and the workpiece is prone to loosening and slipping during the high-speed operation of the gear hobbing machine. This will not only cause processing deviations, but may also cause serious malfunctions such as the machine gears breaking due to the workpiece offset colliding with the hob, increasing equipment maintenance costs and production safety hazards. If the fastening force is increased to avoid loosening, it will cause the nut and the core shaft thread to be over-engaged, making subsequent disassembly difficult. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a high-efficiency automatic workpiece locking mechanism for gear hobbing machines, thereby solving the problems mentioned in the background section regarding the inconvenience of workpiece fixing in existing gear hobbing machines.

[0004] To achieve the above-mentioned objectives, this utility model provides the following technical solution: a high-efficiency automatic workpiece locking mechanism for a gear hobbing machine, comprising a machine tool spindle and a machine tool tailstock block, wherein a machine tool tailstock hole is formed in the machine tool tailstock block, characterized in that it further comprises: A movable rotating ejector pin is disposed within the tailstock hole of the machine tool; The bearing housing is disposed on the side of the movable rotating ejector pin opposite to the tailstock hole of the machine tool, and the bearing housing is fixedly connected to the coaxial axis. A pressure head shaft is disposed inside the bearing housing, with one end of the pressure head shaft extending to the outside of the bearing housing; A positioning sleeve is fitted onto the pressure head shaft and is located at the bottom of the bearing housing. The pressure head shaft is installed inside the bearing housing via the positioning sleeve. A rotating connection fitting, comprising multiple sets of bearing components, wherein the pressure head shaft is rotatably connected to the bearing housing via the rotating connection fitting; A mating pressure head is provided at the end of the pressure head shaft. A structural ring is provided at the connection between the mating pressure head and the pressure head shaft. The end of the mating pressure head is provided with a mating hole corresponding to the machine tool core shaft.

[0005] Preferably, the positioning sleeve is provided with multiple sets of fixing holes, and the bearing housing is provided with multiple sets of fixing screw holes corresponding to the fixing holes. The positioning sleeve is fixedly installed on the underside of the bearing housing by multiple sets of bolts.

[0006] Preferably, the rotating connection accessory includes a spacer, a first bearing component, and a second bearing component. The spacer is sleeved on the pressure head shaft, and the first and second bearing components are sleeved on the pressure head shaft. The inner rings of the first and second bearing components are fixedly connected to the pressure head shaft. The first bearing component is located on the side of the spacer near the end of the pressure head shaft, and the second bearing component is located between the spacer and the positioning sleeve.

[0007] Preferably, the outer ring of the spacer is fixedly connected to the bearing housing, and spacer abutments are provided on both sides of the spacer, with the outer rings of the first bearing component and the second bearing component abutting against the spacer abutments.

[0008] Preferably, the positioning sleeve has a positioning sleeve abutment on the side adjacent to the second bearing component, and the outer ring of the second bearing component abuts against the positioning sleeve abutment.

[0009] Preferably, a locking nut is fixedly provided at the end of the pressure head shaft, the locking nut is fixedly connected to the pressure head shaft, and the locking nut abuts against the inner ring of the first bearing component.

[0010] Preferably, the positioning sleeve has a third bearing fixing groove on the side opposite to the second bearing component, and a third bearing component is provided in the third bearing fixing groove. The inner ring of the third bearing component is fixedly connected to the pressure head shaft, and the inner ring of the third bearing component abuts against the structural ring.

[0011] Preferably, an inner convex ring is provided in the fixing groove of the third bearing component, and the outer ring of the third bearing component is fixedly connected to the positioning sleeve through the inner convex ring.

[0012] Compared with the prior art, this utility model provides a high-efficiency automatic workpiece locking mechanism for gear hobbing machines, which has the following advantages: This gear hobbing machine uses a high-efficiency automatic workpiece locking mechanism, which includes a machine tool spindle, machine tool tailstock block, movable rotating ejector pin, bearing housing, pressure head shaft, positioning sleeve, rotating connecting accessories, and docking pressure head. The device utilizes the gear hobbing machine's built-in tailstock hydraulic system, replacing the original fixed tailstock ejector pin with a movable rotating ejector pin. The hydraulically driven docking pressure head presses down, causing it to press against the workpiece and secure it. The docking pressure head and pressure head shaft can rotate with the workpiece without affecting subsequent processing. Compared to existing nut-fixing methods, it eliminates the need for manual tightening of nuts, offers faster fixing speed, significantly improves production efficiency, and avoids the disadvantages of overly tight and difficult disassembly, as well as loosening and slippage. It provides a foundation for the automation transformation of gear hobbing machines and is highly practical. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is an exploded view of the overall structure of this utility model; Figure 3 This is an exploded view of the overall structure of this utility model; Figure 4 This is a schematic diagram of the pressure head shaft and the rotating connection accessory of this utility model; Figure 5 This is a schematic diagram of the rotating connection accessory of this utility model.

[0014] In the diagram: 1. Machine tool spindle; 2. Machine tool tailstock block; 3. Machine tool tailstock hole; 4. Movable rotating ejector pin; 5. Bearing housing; 6. Indenter shaft; 7. Positioning sleeve; 8. Connecting indenter; 9. Structural ring; 10. Fixing hole; 11. Fixing screw hole; 12. Spacer; 13. First bearing component; 14. Second bearing component; 15. Spacer anti-protrusion; 16. Positioning sleeve anti-protrusion; 17. Pin nut; 18. Third bearing component fixing groove; 19. Third bearing component; 20. Inner convex ring. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figure 1-5 This utility model provides a technical solution: A high-efficiency automatic workpiece locking mechanism for a gear hobbing machine includes a machine tool spindle 1 and a machine tool tailstock block 2, wherein a machine tool tailstock hole 3 is formed in the machine tool tailstock block 2, characterized in that it further includes: The movable rotating ejector pin 4 is located inside the tailstock hole 3 of the machine tool. Unlike the existing ones, the existing fixed tailstock ejector pin is replaced by the movable rotating ejector pin 4 in this solution.

[0017] The bearing housing 5 is located on the side of the movable rotating ejector pin 4 away from the tailstock hole 3 of the machine tool, and the bearing housing 5 is fixedly connected to the coaxial axis. The pressure head shaft 6 is disposed inside the bearing housing 5, and one end of the pressure head shaft 6 extends to the outside of the bearing housing 5. Positioning sleeve 7 is sleeved on the pressure head shaft 6 and is located at the bottom of the bearing housing 5. The pressure head shaft 6 is installed inside the bearing housing 5 through the positioning sleeve 7. Rotary connecting fittings, which include multiple sets of bearing components, and the pressure head shaft 6 is rotatably connected to the bearing housing 5 through the rotary connecting fittings; The mating pressure head 8 is located at the end of the pressure head shaft 6. A structural ring 9 is provided at the connection between the mating pressure head 8 and the pressure head shaft 6. The end of the mating pressure head 8 has a mating hole corresponding to the machine tool core shaft 1. The workpiece to be processed is placed on the machine tool core shaft 1. The hydraulic system of the gear hobbing machine drives the movable rotating ejector pin 4 to press down, and the mating pressure head 8 presses down and covers the machine tool core shaft 1, pressing the workpiece with its edge to fix the workpiece. The entire mating pressure head 8 and pressure head shaft 6 can rotate with the workpiece without affecting subsequent operations. By fixing the workpiece in a self-contained manner, the entire operation process can be automated, and the workpiece to be processed can be automatically fixed, providing a foundation for the automation transformation of gear hobbing machines.

[0018] Furthermore, the positioning sleeve 7 is provided with multiple sets of fixing holes 10, and the bearing housing 5 is provided with multiple sets of fixing screw holes 11 corresponding to the fixing holes 10. The positioning sleeve 7 is fixedly installed on the underside of the bearing housing 5 by multiple sets of bolts. It is recommended to machine grooves on the outer side of the fixing holes 10 to hide the ends of the bolts.

[0019] Furthermore, the rotating connection accessories include a spacer 12, a first bearing 13, and a second bearing 14. The spacer 12 is sleeved on the pressure head shaft 6, and the first bearing 13 and the second bearing 14 are sleeved on the pressure head shaft 6. The inner rings of the first bearing 13 and the second bearing 14 are fixedly connected to the pressure head shaft 6. The first bearing 13 is located on the side of the spacer 12 near the end of the pressure head shaft 6, and the second bearing 14 is located between the spacer 12 and the positioning sleeve 7.

[0020] Furthermore, the outer ring of the spacer 12 is fixedly connected to the bearing housing 5, and spacer abutments 15 are provided on both sides of the spacer 12. The outer rings of the first bearing component 13 and the second bearing component 14 abut against the spacer abutments 15.

[0021] Furthermore, a positioning sleeve abutment 16 is provided on the side of the positioning sleeve 7 near the second bearing component 14, and the outer ring of the second bearing component 14 abuts against the positioning sleeve abutment 16. The cooperation between the spacer sleeve abutment 15 and the positioning sleeve abutment 16 allows the outer rings of the first bearing component 13 and the second bearing component 14 to be fixedly connected to the bearing housing 5, so that bearing components with slightly smaller outer rings can be used, which is convenient for assembly and disassembly.

[0022] Furthermore, a locking nut 17 is fixedly provided at the end of the pressure head shaft 6. The locking nut 17 is fixedly connected to the pressure head shaft 6, and the locking nut 17 abuts against the inner ring of the first bearing component 13.

[0023] Furthermore, a third bearing fixing groove 18 is provided on the side of the positioning sleeve 7 away from the second bearing component 14. A third bearing component 19 is provided in the third bearing fixing groove 18. The inner ring of the third bearing component 19 is fixedly connected to the pressure head shaft 6, and the inner ring of the third bearing component 19 abuts against the structural ring 9. The rotating connecting fittings, the locking nut 17, the positioning sleeve 7, the third bearing fixing groove 18, and the structural ring 9 secure the entire pressure head shaft 6 to the positioning sleeve 7. The various bearing components press against each other, ultimately fixing the entire pressure head shaft 6 to the positioning sleeve 7. The pressure head shaft 6 can rotate relative to the positioning sleeve 7. The positioning sleeve 7 is fixed to the underside of the bearing housing 5 by multiple sets of bolts. The entire bearing housing 5 encloses the first bearing component 13 and the second bearing component 14, and the positioning sleeve 7 encloses the third bearing component 19. This prevents dust from entering the bearing components and significantly improves the service life of the device. The specific models of the first bearing component 13, the second bearing component 14, and the third bearing component 19 are not limited. It is recommended that the first bearing component 13 and the second bearing component 14 use 6210 bearings, and that the third bearing component 19 use 51310 bearings.

[0024] Furthermore, an inner convex ring 20 is provided in the fixing groove 18 of the third bearing component, and the outer ring of the third bearing component 19 is fixedly connected to the positioning sleeve 7 through the inner convex ring 20.

[0025] Structural Description: Machine tool core 1: A component on the gear hobbing machine, used to mount the workpiece to be processed. Compared with the conventional setup, it does not have threads. Machine tool tailstock block 2: A basic block structure that supports the movable rotating ejector pin 4. It has a machine tool tailstock hole 3 inside to provide space for the installation and axial movement of the movable rotating ejector pin 4 and to support the locking mechanism and related components. Machine tool tailstock hole 3: A hole-like structure opened in the machine tool tailstock block 2, used to accommodate and limit the movable rotating ejector 4, to ensure the stability of the movable rotating ejector 4 when it moves along the axial direction and to avoid deviation; Movable rotating ejector pin 4: A movable ejector pin structure (replacing the traditional fixed ejector pin) placed in the tailstock hole 3 of the machine tool. One end is coaxially fixedly connected to the bearing housing 5. It is driven to move axially through the hydraulic system of the gear hobbing machine tailstock, which drives the subsequent components to press the workpiece. Bearing housing 5: A housing structure located on the side of the movable rotating ejector pin 4 away from the tailstock hole 3 of the machine tool. It houses the pressure head shaft 6, the first bearing component 13 and the second bearing component 14. The outer wall is provided with a fixing screw hole 11 corresponding to the fixing hole 10, which is used to connect the positioning sleeve 7 and protect the internal bearing components. Press head shaft 6: A shaft structure that passes through the bearing housing 5. One end extends to the outside of the bearing housing 5 and connects to the mating press head 8. The outer periphery is fitted with a spacer 12, a first bearing component 13, a second bearing component 14 and a third bearing component 19. The end is provided with a pin nut 17, which can rotate synchronously with the workpiece. Positioning sleeve 7: An annular structure fitted on the pressure head shaft 6 and located at the bottom of the bearing housing 5, with multiple sets of fixing holes 10 (which cooperate with fixing screw holes 11), a positioning sleeve abutment 16, and a third bearing component fixing groove 18 on one side for installing the pressure head shaft 6 and the third bearing component 19. The mating head 8 is a pressing structure set at the end of the head shaft 6. A structural ring 9 is provided at the connection with the head shaft 6. The end of the ring has a mating hole corresponding to the machine tool core shaft 1. The machine tool core shaft 1 can be fitted onto the head shaft 6 and abut against the workpiece, so as to fix the workpiece and allow it to rotate with the workpiece. Structural ring 9: An annular fitting located at the connection between the mating pressure head 8 and the pressure head shaft 6, used to connect the two and abut against the inner ring of the third bearing component 19, assisting in positioning the third bearing component 19 and preventing its axial movement; Fixing hole 10: A hole-like structure formed on the positioning sleeve 7, corresponding to the fixing screw hole 11 of the bearing housing 5, for bolts to pass through to fix the positioning sleeve 7 to the bottom of the bearing housing 5, and a groove can be machined on the outside to hide the bolt end; Fixed screw hole 11: A threaded hole structure opened on the bearing housing 5, corresponding to the fixed hole 10 of the positioning sleeve 7. The positioning sleeve 7 and the bearing housing 5 are stably connected by bolts to ensure the integrity of the structure. Spacer 12: A ring structure fitted on the pressure head shaft 6. The outer ring is fixedly connected to the bearing housing 5. Spacer protrusions 15 are provided on both sides to limit the outer rings of the first bearing component 13 and the second bearing component 14. The bearing outer ring does not need to be fixed to the housing. First bearing component 13: A bearing structure sleeved on the pressure head shaft 6 and located on the side of the spacer 12 near the end of the pressure head shaft 6. The inner ring is fixed to the pressure head shaft 6, the outer ring abuts against the spacer abutment 15, and the inner ring is held in place by the pin nut 17 to assist the pressure head shaft 6 in rotating stably. Second bearing component 14: A bearing structure sleeved on the pressure head shaft 6 and located between the spacer sleeve 12 and the positioning sleeve 7. The inner ring is fixed to the pressure head shaft 6, and the outer ring abuts against the spacer sleeve protrusion 15 and the positioning sleeve protrusion 16, further assisting the pressure head shaft 6 to rotate smoothly. Spacer sleeve protrusion 15: The protrusion structure set on both sides of the spacer sleeve 12 abuts against the outer rings of the first bearing component 13 and the second bearing component 14 respectively, thereby limiting the axial movement of the two bearing components and simplifying the bearing installation and fixing method. Positioning sleeve protrusion 16: A protrusion structure provided on the side of the positioning sleeve 7 near the second bearing member 14, abutting against the outer ring of the second bearing member 14, and cooperating with the spacer sleeve protrusion 15 to form a bidirectional limiting of the second bearing member 14; Pin nut 17: A nut structure fixed to the end of the pressure head shaft 6, threadedly connected to the pressure head shaft 6 and abutting against the inner ring of the first bearing member 13, fixing the position of the first bearing member 13 and preventing it from moving axially along the pressure head shaft 6; Third bearing component fixing groove 18: A groove-shaped structure opened on the side of the positioning sleeve 7 away from the second bearing component 14, with an inner protruding ring 20 inside, used to accommodate and position the third bearing component 19, and to provide installation space for the third bearing component 19. Third bearing component 19: A bearing structure placed in the fixing groove 18 of the third bearing component. The inner ring is fixed to the pressure head shaft 6 and abuts against the structural ring 9. The outer ring is fixed to the positioning sleeve 7 through the inner convex ring 20, which assists the rotation of the pressure head shaft 6 close to the end of the mating pressure head 8. Inner convex ring 20: An annular protrusion structure set in the fixing groove 18 of the third bearing component, abutting against the outer ring of the third bearing component 19, thereby limiting the radial and axial movement of the third bearing component 19 and ensuring its stable installation.

[0026] Working principle: First, the workpiece to be processed is placed on the machine tool spindle 1. The core power of the locking mechanism comes from the tailstock hydraulic system of the gear hobbing machine. The operator starts the tailstock hydraulic system through the existing control system, which drives the movable rotating ejector pin 4 to move axially towards the workpiece. At this time, the mating pressure head 8, which is connected to the movable rotating ejector pin 4 through the bearing housing 5, the pressure head shaft 6, and the rotating connecting accessories, moves axially synchronously with the movable rotating ejector pin 4. When the mating pressure head 8 contacts the end face of the workpiece, the hydraulic system continuously provides stable pressure, so that the mating pressure head 8 applies axial clamping force to the workpiece until the clamping force reaches the preset value (this is existing technology and can be precisely controlled by the pressure regulating valve of the hydraulic system). At this time, the workpiece to be processed is firmly fixed on the machine tool spindle 1, completing the entire fastening process. Compared to the time-consuming manual tightening of nuts in traditional methods, the hydraulic drive action at this stage can be completed in just a few seconds. Moreover, the clamping force can be quantitatively controlled by hydraulic pressure (existing technology), avoiding the problems of insufficient or excessive clamping force in manual operation. When the hydraulic pressure is set within a reasonable range, it can ensure that the workpiece will not loosen or slip due to insufficient clamping force, and also avoid the difficulty of subsequent disassembly due to excessive pressure. This fundamentally solves the shortcomings of traditional fixing methods in controlling the clamping force.

[0027] During gear hobbing, the workpiece needs to rotate at high speed around the axis of the machine tool's core shaft 1. If the mating pressure head 8 and the pressure head shaft 6 are fixed structures, friction between the stationary and rotating workpieces will cause damage to the workpiece surface or deviation in machining accuracy. Therefore, the mechanism is equipped with a bearing housing 5 and rotating connecting accessories between the movable rotating ejector pin 4 and the pressure head shaft 6, allowing the entire pressure head shaft 6 to rotate relative to the bearing housing 5. When the gear hobbing machine drives the machine tool spindle 1 to rotate synchronously with the workpiece, the friction between the workpiece end face and the mating pressure head 8 causes the mating pressure head 8 and the pressure head shaft to rotate together. Supported by the first bearing component 13, the second bearing component 14, and the third bearing component 19 within the bearing housing 5, the pressure head shaft 6 can rotate freely around its own axis, ultimately achieving synchronous rotation of the mating pressure head 8, the pressure head shaft 6, and the workpiece. During this process, the bearing housing 5 provides fixed support, ensuring that the rotation axis of the pressure head shaft 6 remains coaxial with the rotation axis of the machine tool spindle 1, avoiding fluctuations in clamping force due to rotational offset. Simultaneously, the hydraulic system maintains a stable pressure, ensuring that the mating pressure head 8 always applies a constant axial clamping force to the workpiece, ensuring that the workpiece remains stable and fixed during high-speed rotational processing, without affecting machining accuracy. This follow-up rotation design allows the mechanism to fully adapt to the processing requirements of the gear hobbing machine while performing its fixed function. There is no need to remove the fixed position or adjust the structure during processing, realizing a continuous operation mode of one-time fixing and full-process processing. This provides key support for the automated production line operation of the gear hobbing machine. After a single workpiece is processed, the hydraulic circuit of the tailstock is closed by the control system, the hydraulic pressure is released, and the movable rotating ejector pin 4 drives the docking pressure head 8 to retract in the opposite direction, so that the workpiece can be easily removed.

[0028] In summary, this automatic locking mechanism uses the hydraulic resources of the gear hobbing machine to fix the workpiece to be processed, which not only solves the problems of low efficiency, difficult operation and high risk of traditional nut fixing methods, but also achieves perfect matching with the processing action. It provides a core workpiece fixing solution for the transformation of gear hobbing machines from semi-automatic to fully automatic, and has significant technical practicality and production applicability.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency automatic workpiece locking mechanism for a gear hobbing machine, comprising a machine tool spindle (1) and a machine tool tailstock block (2), wherein a machine tool tailstock hole (3) is provided in the machine tool tailstock block (2), characterized in that, Also includes: A movable rotating ejector pin (4) is disposed in the tailstock hole (3) of the machine tool; The bearing housing (5) is located on the side of the movable rotating ejector pin (4) away from the machine tool tailstock hole (3), and the bearing housing (5) is fixedly connected to the coaxial axis. A pressure head shaft (6) is disposed inside the bearing housing (5), and one end of the pressure head shaft (6) extends to the outside of the bearing housing (5); Positioning sleeve (7) is fitted on the pressure head shaft (6) and the positioning sleeve (7) is placed at the bottom of the bearing housing (5). The pressure head shaft (6) is installed inside the bearing housing (5) through the positioning sleeve (7). Rotary connecting fitting, the rotary connecting fitting includes multiple sets of bearing components, the pressure head shaft (6) is rotatably connected to the bearing housing (5) through the rotary connecting fitting; The mating head (8) is located at the end of the head shaft (6). A structural ring (9) is provided at the connection between the mating head (8) and the head shaft (6). The end of the mating head (8) is provided with a mating hole corresponding to the machine tool core shaft (1).

2. The high-efficiency automatic workpiece locking mechanism for a gear hobbing machine according to claim 1, characterized in that, The positioning sleeve (7) is provided with multiple sets of fixing holes (10), and the bearing housing (5) is provided with multiple sets of fixing screw holes (11) corresponding to the fixing holes (10). The positioning sleeve (7) is fixedly installed below the bearing housing (5) by multiple sets of bolts.

3. The high-efficiency automatic workpiece locking mechanism for a gear hobbing machine according to claim 1, characterized in that, The rotating connection fitting includes a spacer (12), a first bearing (13) and a second bearing (14). The spacer (12) is sleeved on the pressure head shaft (6). The first bearing (13) and the second bearing (14) are sleeved on the pressure head shaft (6). The inner rings of the first bearing (13) and the second bearing (14) are fixedly connected to the pressure head shaft (6). The first bearing (13) is placed on the side of the spacer (12) near the end of the pressure head shaft (6). The second bearing (14) is placed between the spacer (12) and the positioning sleeve (7).

4. The high-efficiency automatic workpiece locking mechanism for a gear hobbing machine according to claim 3, characterized in that, The outer ring of the spacer (12) is fixedly connected to the bearing housing (5). Spacer abutments (15) are provided on both sides of the spacer (12). The outer rings of the first bearing component (13) and the second bearing component (14) abut against the spacer abutments (15).

5. The high-efficiency automatic workpiece locking mechanism for a gear hobbing machine according to claim 4, characterized in that, The positioning sleeve (7) has a positioning sleeve protrusion (16) on the side near the second bearing member (14), and the outer ring of the second bearing member (14) abuts against the positioning sleeve protrusion (16).

6. The high-efficiency automatic workpiece locking mechanism for a gear hobbing machine according to claim 5, characterized in that, The end of the pressure head shaft (6) is fixedly provided with a pin nut (17), which is fixedly connected to the pressure head shaft (6) and abuts against the inner ring of the first bearing component (13).

7. The high-efficiency automatic workpiece locking mechanism for a gear hobbing machine according to claim 6, characterized in that, The positioning sleeve (7) has a third bearing fixing groove (18) on the side away from the second bearing component (14). The third bearing component (19) is provided in the third bearing fixing groove (18). The inner ring of the third bearing component (19) is fixedly connected to the pressure head shaft (6), and the inner ring of the third bearing component (19) abuts against the structural ring (9).

8. The high-efficiency automatic workpiece locking mechanism for a gear hobbing machine according to claim 7, characterized in that, An inner protruding ring (20) is provided in the fixing groove (18) of the third bearing component, and the outer ring of the third bearing component (19) is fixedly connected to the positioning sleeve (7) through the inner protruding ring (20).

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