A quick tool changer for a machining center

Abstract

This utility model belongs to the field of lathe tool changing technology and discloses a quick tool changing device for machining centers, including a tool head clamp, a positioning fixture, and a special wrench. One side of the tool head clamp is provided with a lathe mating lock head and a lathe mating cone corresponding to the lathe. A retaining ring is provided on the side of the lathe mating cone facing away from the lathe mating lock head, and a tool fixing component is provided on the side of the retaining ring facing away from the lathe mating lock head. A retaining groove is provided at the connection between the retaining ring and the tool fixing component. Two sets of positioning notches are provided on the outer side of the retaining ring and the tool fixing component. This utility model has a compact and reasonable structural design, which can fix the tool head on the clamp. By changing the clamp, the lathe tool can be quickly changed. The positioning fixture can be used to fix the tool head clamp, and the tool fixing component can be loosened or tightened by turning the tool head clamp with the special wrench, facilitating the replacement of damaged tools. The device has a long service life, is easy and simple to use, and can effectively improve work efficiency.

Description

Technical Field

[0001] This utility model relates to the field of lathe tool changing technology, specifically a quick tool changing device for machining centers. Background Technology

[0002] In the field of modern machining, with the rapid development of manufacturing, the precision, efficiency, and automation level of machining have become important indicators for measuring a company's competitiveness. Modern machining encompasses various processes, such as turning, milling, and drilling, and is widely used in many industries, including automobile manufacturing, aerospace, and electronic equipment, providing high-precision, high-quality parts for these industries.

[0003] In machining, cutting tools are key components that directly participate in cutting, and their performance and condition directly affect machining quality and efficiency. However, because cutting tools operate in harsh environments with high speed, high pressure, and high temperature, wear or damage is inevitable. Tool wear not only leads to decreased machining accuracy, increased workpiece dimensional deviations, and increased surface roughness, affecting product quality, but may also cause vibration and noise, further reducing machining stability. When a tool is damaged, machining can be completely halted. Therefore, timely replacement of worn or damaged cutting tools is a necessary measure to ensure the normal operation of machining.

[0004] However, existing lathe tool changing methods have many problems, seriously affecting production efficiency. Traditional tool changing methods usually require complex operating procedures. Operators must first stop the machine, then use various tools, such as wrenches and screwdrivers, to disassemble the components that hold the tool in place one by one, remove the old tool, and then install the new tool in reverse order. This process is not only cumbersome but also requires a high level of skill from the operator, making it prone to operational errors. In addition, the long tool changing time leads to increased machine downtime, significantly reducing production efficiency. Frequent tool changing can also affect the accuracy of the machine tool, as each disassembly and installation of the tool may introduce a certain amount of error, affecting the consistency and stability of machining. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a quick tool changing device for machining centers, which solves the problems mentioned in the background art, such as the inconvenience of replacing worn or damaged tools during machining.

[0006] To achieve the aforementioned objectives, this utility model provides the following technical solution: a quick-change tool changing device for a machining center, comprising a tool holder, a positioning fixture, and a special wrench. One side of the tool holder is provided with a lathe-fitting lock head and a lathe-fitting taper corresponding to the lathe. A retaining ring is provided on the side of the lathe-fitting taper facing away from the lathe-fitting lock head. A tool fixing assembly is provided on the side of the retaining ring facing away from the lathe-fitting lock head. A retaining groove is provided at the connection between the retaining ring and the tool fixing assembly. Two sets of positioning notches are provided on the outer sides of the retaining ring and the tool fixing assembly. The tool fixing assembly includes an outer sleeve, multiple sets of sector-shaped locking blocks, a locking disc, and a sealing sleeve head. The outer sleeve is welded to a retaining ring. A locking disc is provided at the bottom of the inner sleeve. Multiple sets of sector-shaped locking blocks are provided on the side of the locking disc opposite to the retaining ring. The multiple sets of sector-shaped locking blocks are spliced ​​into a ring shape with the tool holder fixing port at the center. A sealing sleeve head is fitted on the outer side of the multiple sets of sector-shaped locking blocks. An internal thread ring is machined on the inner side wall of the outer sleeve. An external thread ring corresponding to the internal thread ring is machined on the outer side wall of the sealing sleeve head. The sealing sleeve head is threadedly connected to the outer sleeve. An anti-detachment male ring is provided on the sealing sleeve head opposite to the external thread ring. A movable female groove is opened in the inner sleeve opposite to the internal thread ring. The anti-detachment male ring is engaged in the movable female groove. The sealing sleeve head is fixedly connected to the outer sleeve through the anti-detachment male ring.

[0007] Preferably, the locking disc is provided with two sets of anti-rotation protrusions, and the bottom of the outer sleeve is provided with a snap-fit ​​groove corresponding to the anti-rotation protrusions, and the anti-rotation protrusions snap into the snap-fit ​​grooves.

[0008] Preferably, the locking disc has multiple sets of track grooves corresponding to the sector-shaped locking blocks, and track rods are slidably engaged in the track grooves, with the multiple sets of track rods being welded to the corresponding sector-shaped locking blocks respectively.

[0009] Preferably, the fan-shaped locking block has a limiting groove on the side opposite to the locking disc, and a limiting slider is slidably engaged in the limiting groove. Multiple sets of limiting sliders are welded to the sealing sleeve head.

[0010] Preferably, the sealing sleeve head has an avoidance hole corresponding to the tool holder fixing port on the side opposite to the fan-shaped locking block, and the side wall of the sealing sleeve head has multiple sets of specially made slots that are circumferentially symmetrical.

[0011] Preferably, the positioning fixture includes a fixed plate and a positioning collar. The positioning collar is fixedly connected to one side of the fixed plate, and the positioning collar has an anti-rotation mating opening corresponding to the positioning notch.

[0012] Preferably, the special wrench includes an anti-slip handle, an arc block, and multiple sets of convex locking heads. An arc block is provided on one side of the anti-slip handle, and multiple sets of convex locking heads corresponding to the special locking slots are provided on the inner wall of the arc block.

[0013] Compared with the prior art, this utility model provides a quick tool changing device for machining centers, which has the following advantages: 1. This quick tool changer for machining centers is equipped with a tool head clamp, a positioning fixture, and a special wrench. It can fix the tool head on the clamp, and the tool can be quickly changed on the lathe by changing the clamp. The positioning fixture can be used to fix the tool head clamp, and the tool fixing component can be loosened or tightened by turning the tool head clamp with the special wrench. This facilitates the replacement of damaged tools. The device has a long service life, is easy and simple to use, and can effectively improve work efficiency.

[0014] 2. It is equipped with an anti-detachment male ring, which uses the sealing sleeve head to fix the precision structure together. The anti-detachment male ring and the movable female groove can prevent the sealing sleeve head from detaching from the outer sleeve, which can increase the stability of the device, prevent damage to the precision structure or loss of small parts, and effectively improve the service life of the device.

[0015] 3. It is equipped with a special wrench and a special slot. The convex head applies force against the side wall of the slot, making the clamp less prone to damage and deformation. If too much force is applied accidentally, the damage to the convex head can replace the damage to the more valuable cutter head clamp, thus preventing significant economic losses. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the cutter head clamp structure of this utility model; Figure 3 This is a schematic diagram of the tool fixing assembly structure of this utility model; Figure 4 This is a schematic diagram of the lock disc and the sector-shaped locking block of this utility model; Figure 5 This is a schematic diagram of the positioning tooling structure of this utility model; Figure 6 This is a schematic diagram of the specially designed wrench structure of this utility model.

[0017] In the diagram: 1. Tool holder; 2. Positioning fixture; 3. Special wrench; 4. Lathe-fitting lock head; 5. Lathe-fitting taper; 6. Snap ring; 7. Snap groove; 8. Positioning notch; 9. Tool fixing assembly; 10. Outer sleeve; 11. Sector-shaped locking block; 12. Locking disc; 13. Sealing sleeve head; 14. Internal threaded ring; 15. External threaded ring; 16. Anti-detachment male ring; 17. Movable female groove; 18. Anti-rotation convex; 19. Snap-fit ​​groove; 20. Track groove; 21. Track moving rod; 22. Limiting slide groove; 23. Limiting slider; 24. Clearance hole; 25. Special snap groove; 26. Fixing plate; 27. Positioning collar; 28. Anti-rotation mating port; 29. ​​Anti-slip handle; 30. Arc block; 31. Convex snap head. Detailed Implementation

[0018] 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.

[0019] Please see Figure 1-6 This utility model provides a technical solution: A quick-change tool changing device for a machining center includes a tool holder 1, a positioning fixture 2, and a special wrench 3. One side of the tool holder 1 is provided with a lathe-compatible locking head 4 and a lathe-compatible taper 5. A retaining ring 6 is provided on the side of the lathe-compatible taper 5 facing away from the lathe-compatible locking head 4. A tool fixing assembly 9 is provided on the side of the retaining ring 6 facing away from the lathe-compatible locking head 4. A retaining groove 7 is provided at the connection between the retaining ring 6 and the tool fixing assembly 9. Two sets of positioning notches 8 are provided on the outer sides of the retaining ring 6 and the tool fixing assembly 9. The tool holder 1 is directly inserted into the lower part of the lathe spindle and coaxially connected to the spindle.

[0020] Furthermore, the tool fixing assembly 9 includes an outer sleeve 10, multiple sets of sector-shaped locking blocks 11, a locking disc 12, and a sealing sleeve head 13. The outer sleeve 10 is welded to the retaining ring 6. A locking disc 12 is provided at the bottom of the inner sleeve 10. Multiple sets of sector-shaped locking blocks 11 are provided on the side of the locking disc 12 opposite to the retaining ring 6. The multiple sets of sector-shaped locking blocks 11 are spliced ​​into a ring shape with the tool holder fixing port at the center. The sealing sleeve head 13 is sleeved on the outer side of the multiple sets of sector-shaped locking blocks 11. The inner wall of the outer sleeve 10 The sealing sleeve head 13 has an internal threaded ring 14 and an external threaded ring 15 corresponding to the internal threaded ring 14 on its outer side wall. The sealing sleeve head 13 is threadedly connected to the outer sleeve 10. An anti-detachment male ring 16 is provided on the sealing sleeve head 13 away from the external threaded ring 15. A movable female groove 17 is provided inside the outer sleeve 10 away from the internal threaded ring 14. The anti-detachment male ring 16 is engaged in the movable female groove 17. The sealing sleeve head 13 is fixedly connected to the outer sleeve 10 through the anti-detachment male ring 16. The depth of the movable female groove 17 is greater than the height of the anti-detachment male ring 16, allowing the anti-detachment male ring 16 to move slightly within the movable female groove 17, leaving space for thread tightening.

[0021] Furthermore, the locking disc 12 is provided with two sets of anti-rotation protrusions 18, and the bottom of the outer sleeve 10 is provided with a corresponding snap-fit ​​groove 19, in which the anti-rotation protrusions 18 snap into the snap-fit ​​groove 19. The anti-rotation protrusions 18 are used to prevent the locking disc 12 from rotating relative to the outer sleeve 10, so as to ensure that the locking disc 12 will not rotate when the sealing sleeve head 13 is rotated.

[0022] Furthermore, the locking disc 12 has multiple sets of track grooves 20 corresponding to the sector-shaped locking blocks 11. Track rods 21 are slidably engaged within the track grooves 20, and the multiple sets of track rods 21 are welded to their respective sector-shaped locking blocks 11. When the locking disc 12 and the track rods 21 rotate relative to each other, the track rods 21 engage within the track grooves 20, changing their distance from the center of the locking disc 12. This changes the distance between the sector-shaped locking blocks 11 and the center of the locking disc 12, thereby achieving locking and unlocking.

[0023] Furthermore, a limiting groove 22 is provided on the side of the sector-shaped locking block 11 opposite to the locking disc 12. A limiting slider 23 is slidably engaged in the limiting groove 22, and multiple sets of limiting sliders 23 are welded to the sealing sleeve head 13. The limiting groove 22 and the limiting sliders 23 ensure that multiple sets of sector-shaped locking blocks 11 rotate together with the sealing sleeve head 13, and the sector-shaped locking blocks 11 can slide back and forth relative to the limiting sliders 23 without affecting their locking movement.

[0024] Furthermore, the sealing socket head 13 has a clearance hole 24 corresponding to the tool holder fixing opening on the side opposite to the fan-shaped locking block 11, and the side wall of the sealing socket head 13 has multiple sets of specially designed grooves 25 arranged in a circular symmetrical pattern. Compared with the traditional hex wrench, the use of specially designed grooves 25 allows the end of the sealing socket head 13 to remain round, which can greatly improve its durability. Moreover, if too much force is applied, the traditional hex wrench structure is prone to damage to the hexagon being tightened. This structure is also prone to damage and breakage of the convex locking head 31 that is engaged in the specially designed groove 25. It is not difficult to see from the precision of the structure that the value of the sealing socket head 13 is far higher than that of the specially designed wrench 3, which can avoid significant economic losses.

[0025] Furthermore, the positioning fixture 2 includes a fixing plate 26 and a positioning collar 27. The positioning collar 27 is fixedly connected to one side of the fixing plate 26, and the positioning collar 27 has an anti-rotation mating port 28 corresponding to the positioning notch 8. The fixing plate 26 has a fixing bolt hole on the side away from the positioning collar 27, which can be fixed to the table surface by bolts, generally fixed to one side of the table.

[0026] Furthermore, the special wrench 3 includes an anti-slip handle 29, an arc block 30, and multiple sets of convex locking heads 31. An arc block 30 is provided on one side of the anti-slip handle 29, and multiple sets of convex locking heads 31 corresponding to the special locking groove 25 are provided on the inner wall of the arc block 30.

[0027] Structural Description: Tool holder 1: A key component in the device that connects the lathe and the tool. It has a lathe mating lock head 4 and a lathe mating taper 5 on one side, which can be directly inserted into the lower part of the lathe's rotating spindle and connected coaxially to ensure the stability and accuracy of the tool during operation. Positioning fixture 2: a structure used to fix the tool head clamp 1 when changing tools, including a fixing plate 26 and a positioning collar 27. It is fixed to the table by the fixing plate 26, and the positioning collar 27 cooperates with the positioning notch 8 of the tool head clamp 1 to prevent it from rotating. Special wrench 3: A tool for tightening the tool fixing component on the tool head clamp. It consists of a non-slip handle 29, an arc block 30 and multiple sets of convex clasps 31. The convex clasps 31 cooperate with the special grooves 25 on the sealing sleeve head 13 to achieve the tightening operation. Lathe-fit lock head 4: Located on one side of the tool holder 1, corresponding to the lathe, it is used to connect with the lathe rotating spindle and is one of the key parts for connecting the tool holder 1 with the lathe; Lathe mating cone 5: Also located on one side of the tool holder 1, it mates with the lathe mating lock head 4, so that the tool holder 1 can be directly inserted into the lower part of the lathe rotating spindle and achieve coaxial connection; Snap ring 6: Located on the side of the lathe mating cone 5 away from the lathe mating lock head 4, used to connect the tool fixing assembly 9. A snap groove 7 and a positioning notch 8 are respectively opened at the connection with the tool fixing assembly 9 and on the outside. Slot 7: Located at the connection between the retaining ring 6 and the tool fixing assembly 9, it facilitates subsequent operations, such as fixing or adjusting with other components; Positioning notch 8: Located on the outside of the retaining ring 6 and the tool fixing assembly 9, corresponding to the anti-rotation mating port 28 inside the positioning collar 27 of the positioning fixture 2, used to prevent the tool head clamp 1 from rotating when changing tools; Tool fixing assembly 9: The core part that realizes tool clamping and loosening, including outer sleeve 10, multiple sets of sector locking blocks 11, locking disc 12 and sealing sleeve head 13, which fixes the tool holder through the coordinated work of each component; Outer sleeve 10: Welded to the retaining ring 6, with a locking disc 12 inside and an internal threaded ring 14 machined on the inner side wall for threaded connection with the sealing sleeve head 13, providing an installation base for other components; Fan-shaped locking block 11: Multiple sets are spliced ​​into a ring shape, with a tool holder fixing port in the center for fixing the tool holder. A sealing sleeve head 13 is sleeved on its outer side, and a limit groove 22 is opened on the side away from the locking disc 12. Locking disc 12: Located at the bottom inside the outer sleeve 10, it is provided with two sets of anti-rotation protrusions 18 and multiple sets of trajectory grooves 20. By cooperating with other components, it controls the fan-shaped locking block 11, thereby locking or releasing the tool. Sealing sleeve head 13: It is sleeved on the outside of multiple sets of fan-shaped locking blocks 11 and is threadedly connected to the outer sleeve 10 through an inner thread ring 14 and an outer thread ring 15. It is equipped with an anti-detachment ring 16, a special groove 25 is opened on the side wall, and an avoidance hole 24 is opened on the side away from the fan-shaped locking block 11. Internal thread ring 14: machined on the inner side wall of the outer sleeve 10, and mates with the external thread ring 15 on the outer side wall of the sealing sleeve head 13 to realize the threaded connection between the sealing sleeve head 13 and the outer sleeve 10. External threaded ring 15: Located on the outer side wall of the sealing sleeve head 13, corresponding to the internal threaded ring 14 on the inner side wall of the outer sleeve 10, and the sealing sleeve head 13 can move axially along the outer sleeve 10 through the threaded connection; Anti-detachment male ring 16: It is set on the sealing sleeve head 13 away from the external thread ring 15, and is engaged in the movable female groove 17 inside the outer sleeve 10 to prevent the sealing sleeve head 13 from detaching from the outer sleeve 10 and enhance the stability of the device. The movable groove 17 is located inside the outer sleeve 10 away from the inner thread ring 14, with a depth greater than the height of the anti-detachment male ring 16, so that the anti-detachment male ring 16 can move slightly, leaving space for thread tightening, and at the same time, it cooperates with the anti-detachment male ring 16 to prevent the sealing sleeve head 13 from disengaging. Anti-rotation protrusion 18: Set on the locking disc 12, corresponding to the snap-fit ​​groove 19 at the bottom of the inner side of the outer sleeve 10, snapping into the snap-fit ​​groove 19 to prevent the locking disc 12 from rotating relative to the outer sleeve 10, ensuring structural stability; Snap-fit ​​groove 19: It is opened at the bottom inside the outer sleeve 10 and cooperates with the anti-rotation protrusion 18 on the locking disc 12 to restrict the rotation of the locking disc 12 and ensure the stability of the entire structure during operation. Track groove 20: It is formed on the locking disc 12 and corresponds to the sector-shaped locking block 11. The track moving rod 21 is slidably engaged inside. The sliding of the track moving rod 21 pushes the sector-shaped locking block 11 to change its position, thereby realizing the locking and unlocking of the tool. Track moving rod 21: It is welded to the sector-shaped locking block 11 and is snapped into the track groove 20 of the locking disc 12. When the locking disc 12 and the track moving rod 21 rotate relative to each other, the sector-shaped locking block 11 moves. Limiting groove 22: It is opened on the side of the sector locking block 11 away from the locking disc 12, and the limiting slider 23 is slidably engaged inside to ensure that multiple sets of sector locking blocks 11 can rotate with the sealing sleeve head 13 without affecting their locking movement. Limiting slider 23: It is welded to the sealing sleeve head 13 and is snapped into the limiting slide groove 22 of the sector locking block 11, so that the sector locking block 11 can rotate with the sealing sleeve head 13 and maintain relative sliding, ensuring that the locking action is carried out normally. 24: The clearance hole is opened on the side of the sealing sleeve head 13 away from the fan-shaped locking block 11, corresponding to the tool holder fixing port, to provide space for tool holder installation and avoid interference; Special groove 25: It is symmetrically opened on the side wall of the sealing sleeve head 13 and cooperates with the convex clamp 31 of the special wrench 3 to facilitate the screwing operation of the sealing sleeve head 13, improve durability and reduce economic losses. Fixed plate 26: A component of positioning fixture 2, with a positioning collar 27 fixedly connected on one side and a fixing bolt hole on the other side for fixing positioning fixture 2 to the table surface; Positioning collar 27: Fixed on one side of the fixing plate 26, with an anti-rotation mating port 28 corresponding to the positioning notch 8. It prevents the tool head clamp 1 from rotating when changing tools by mating with the positioning notch 8 on the tool head clamp 1. Anti-rotation mating opening 28: It is opened inside the positioning collar 27 and corresponds to the positioning notch 8 on the tool head clamp 1. It serves to prevent the tool head clamp 1 from rotating and facilitates tool replacement operation. Anti-slip handle 29: Part of the special wrench 3, which makes it easy for the operator to hold, increases friction, makes the operation more stable, and makes it easier to turn the special wrench 3 for tightening operations; Arc block 30: It is set on one side of the anti-slip handle 29. Multiple sets of convex clips 31 are provided on its inner wall, which cooperate with the special slots 25 on the sealing sleeve head 13 to realize the screwing of the sealing sleeve head 13. The convex chuck 31 is located on the inner wall of the arc block 30 and corresponds to the special groove 25 on the sealing sleeve head 13. By applying force against the side wall of the special groove 25, the sealing sleeve head 13 can be screwed. It will be damaged first when the force is too large, thus avoiding damage to the cutter head clamp and causing significant economic losses.

[0028] Working Principle: The tool holder 1 is a key component connecting the lathe and the cutting tool. The lathe mating lock 4 and lathe mating taper 5 on one side allow the tool holder 1 to be directly inserted under the lathe's rotating spindle and coaxially connected, ensuring the stability and accuracy of the cutting tool during operation. A retaining ring 6 is located on the side of the lathe mating taper 5 opposite to the lathe mating lock 4. A groove 7 and a positioning notch 8 at the connection point between the retaining ring 6 and the tool fixing assembly 9 facilitate subsequent operations. The tool fixing assembly 9 is the core component for clamping and releasing the cutting tool. It includes an outer sleeve 10, multiple sets of sector-shaped locking blocks 11, a locking disc 12, and a sealing sleeve head 13. The outer sleeve 10 is welded to the retaining ring 6. The locking disc 12 is located at the bottom inner part of the outer sleeve 10. Multiple sets of sector-shaped locking blocks 11 are assembled into a ring, with a tool shank fixing opening at the center for fixing the tool shank. The sealing sleeve head 13 is fitted onto the outside of multiple sets of sector-shaped locking blocks 11 and is threadedly connected to the outer sleeve 10 via an internal threaded ring 14 and an external threaded ring 15. When the tool needs to be replaced, the sealing sleeve head 13 is turned with a special wrench 3. Since the sealing sleeve head 13 is threadedly connected to the outer sleeve 10, the rotation of the sealing sleeve head 13 will cause it to move axially along the outer sleeve 10. The design of the anti-detachment male ring 16 and the movable female groove 17 further enhances the stability of the device. The anti-detachment male ring 16 is engaged in the movable female groove 17, and the depth of the movable female groove 17 is greater than the height of the anti-detachment male ring 16. This allows the anti-detachment male ring 16 to move slightly within the movable female groove 17, leaving space for thread tightening, while preventing the sealing sleeve head 13 from detaching from the outer sleeve 10, avoiding damage to the precision structure or loss of small parts. The anti-rotation protrusion 18 on the locking disc 12 cooperates with the locking groove 19 at the bottom of the outer sleeve 10 to prevent the locking disc 12 from rotating relative to the outer sleeve 10. When the sealing sleeve head 13 is rotated, the locking disc 12 remains stationary, ensuring the stability of the entire structure. Multiple sets of track grooves 20 on the locking disc 12 slidably engage with the track rods 21 on the sector-shaped locking blocks 11. When the locking disc 12 and the track rods 21 rotate relative to each other, the track rods 21 slide within the track grooves 20, changing their distance from the center of the locking disc 12. This, in turn, pushes the sector-shaped locking blocks 11 to change their distance from the center of the locking disc 12, thus locking and unlocking the tool. Limiting grooves 22 and limiting sliders 23 on the side of the sector-shaped locking blocks 11 opposite to the locking disc 12 ensure that the multiple sets of sector-shaped locking blocks 11 rotate together with the sealing sleeve head 13. Simultaneously, the sector-shaped locking blocks 11 can slide back and forth relative to the limiting sliders 23 without affecting their locking motion. Clearance holes 24 on the side of the sealing sleeve head 13 opposite to the sector-shaped locking blocks 11 provide installation space for the tool holder. Multiple sets of specially designed grooves 25 arranged symmetrically on the side wall, together with the convex clamps 31 on the special wrench 3, facilitate the tightening of the sealing socket head 13. Compared with the traditional hex wrench tightening, the use of special grooves 25 ensures that the end of the sealing socket head 13 remains round, greatly improving its durability.If excessive force is applied, the traditional hexagonal wrench structure is prone to damage to the hexagon being tightened, and this structure is also prone to damage and breakage of the convex collet 31 that is engaged in the special collet groove 25. Since the value of the sealing socket head 13 is far higher than that of the special wrench 3, a large economic loss is avoided. The positioning fixture 2 is used to fix the tool head clamp 1 when changing tools. The positioning fixture 2 includes a fixing plate 26 and a positioning collar 27. The positioning collar 27 has an anti-rotation mating port 28 corresponding to the positioning notch 8. The fixing plate 26 is fixed to the table surface by bolts, usually on one side of the table. The positioning collar 27 engages with the positioning notch 8 on the tool head clamp 1 to prevent the tool head clamp 1 from rotating, facilitating tool changing operations. The special wrench 3 consists of an anti-slip handle 29, an arc block 30, and multiple sets of convex collets 31. The operator grips the non-slip handle 29, aligns the convex chuck 31 with the special groove 25 on the sealing sleeve head 13, and rotates the special wrench 3 to tighten the sealing sleeve head 13, thereby controlling the clamping and loosening of the tool. In summary, this quick-change tool changer for machining centers achieves rapid tool replacement through the coordinated operation of its components, improving work efficiency while ensuring the stability and durability of the device and reducing economic losses.

[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 quick tool changer for a machining center, characterized by: The tool includes a tool holder (1), a positioning fixture (2), and a special wrench (3). One side of the tool holder (1) is provided with a lathe mating lock head (4) and a lathe mating cone (5) corresponding to the lathe. A retaining ring (6) is provided on the side of the lathe mating cone (5) away from the lathe mating lock head (4). A tool fixing assembly (9) is provided on the side of the retaining ring (6) away from the lathe mating lock head (4). A retaining groove (7) is provided at the connection between the retaining ring (6) and the tool fixing assembly (9). Two sets of positioning notches (8) are provided on the outer side of the retaining ring (6) and the tool fixing assembly (9). The tool fixing assembly (9) includes an outer sleeve (10), multiple sets of fan-shaped locking blocks (11), a locking disc (12), and a sealing sleeve head (13). The outer sleeve (10) is welded to the retaining ring (6). A locking disc (12) is provided at the bottom of the inner sleeve (10). Multiple sets of fan-shaped locking blocks (11) are provided on the side of the locking disc (12) away from the retaining ring (6). The multiple sets of fan-shaped locking blocks (11) are spliced ​​into a ring shape with the tool holder fixing port at the center. A sealing sleeve head (13) is sleeved on the outer side of the multiple sets of fan-shaped locking blocks (11). The inner wall of the outer sleeve (10) The inner threaded ring (14) is machined, and the outer wall of the sealing sleeve head (13) is machined with an outer threaded ring (15) corresponding to the inner threaded ring (14). The sealing sleeve head (13) is threadedly connected to the outer sleeve (10). An anti-detachment male ring (16) is provided on the sealing sleeve head (13) away from the outer threaded ring (15). A movable female groove (17) is opened in the outer sleeve (10) away from the inner threaded ring (14). The anti-detachment male ring (16) is engaged in the movable female groove (17). The sealing sleeve head (13) is fixedly connected to the outer sleeve (10) through the anti-detachment male ring (16).

2. The quick tool changer of a machining center according to claim 1, characterized in that: The lock disc (12) is provided with two sets of anti-rotation protrusions (18), and the bottom of the outer sleeve (10) is provided with a snap-fit ​​groove (19) corresponding to the anti-rotation protrusions (18), and the anti-rotation protrusions (18) are snapped into the snap-fit ​​groove (19).

3. The quick tool changer of claim 1, wherein: The locking disc (12) has multiple sets of track grooves (20) corresponding to the sector-shaped locking block (11). Track moving rods (21) are slidably engaged in the track grooves (20), and the multiple sets of track moving rods (21) are welded to the corresponding sector-shaped locking blocks (11).

4. The quick tool changer of claim 1, wherein: The sector-shaped locking block (11) has a limiting groove (22) on the side away from the locking disc (12). The limiting slider (23) is slidably engaged in the limiting groove (22). Multiple sets of limiting sliders (23) are welded to the sealing sleeve head (13).

5. The quick tool changer of claim 1, wherein: The sealing sleeve head (13) has an avoidance hole (24) on the side opposite to the fan-shaped locking block (11) that corresponds to the knife rod fixing port, and the side wall of the sealing sleeve head (13) has multiple sets of specially made slots (25) that are circumferentially symmetrical.

6. The quick tool changer of a machining center according to claim 1, characterized in that: The positioning fixture (2) includes a fixing plate (26) and a positioning collar (27). The positioning collar (27) is fixedly connected to one side of the fixing plate (26). The positioning collar (27) has an anti-rotation mating port (28) corresponding to the positioning notch (8).

7. The quick tool changer of claim 5, wherein: The special wrench (3) includes an anti-slip handle (29), an arc block (30), and multiple sets of convex locking heads (31). An arc block (30) is provided on one side of the anti-slip handle (29), and multiple sets of convex locking heads (31) corresponding to the special locking groove (25) are provided on the inner wall of the arc block (30).

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