Milling tool changing equipment

Abstract

The invention relates to the technical field of machine tools, in particular to milling tool changing equipment which comprises an outer cover, a tool changing disc, a rotating driver, a plurality of tool rests, a plurality of locking structures and a plurality of limiting mechanisms, and the multiple tool rests, the multiple locking structures and the multiple limiting mechanisms are arranged in a one-to-one correspondence mode. The multiple limiting mechanisms and the multiple locking structures are distributed in an arc shape around the rotating axis of the tool changing disc, the tool rest extends out of the edge of the tool changing disc in a cantilever mode, the locking structures are used for locking the tool rest on the tool changing disc, the tool rest is used for storing tools, and the limiting mechanisms are used for limiting the tools on the tool rest; a cutter outlet is formed in one side of the outer cover and used for allowing a cutter to stretch out of the outer cover. The outer end of the tool rest is concavely provided with a bayonet used for clamping a tool from outside to inside. The tool rest can be replaced conveniently, tools stored in the tool rest are limited through the limiting mechanism, loosening of the tools and the tool rest is prevented, and accidents that the tools fall off are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of wires, and in particular to a tool changing device for milling processing. Background Art

[0002] In the milling process of workpieces, different tools are required according to different processing technologies of the workpieces. For workpieces with complex processing structures, tool changing operations are required during the processing. Among them, a tool changer is used to supply different tools to improve the tool changing efficiency, and is particularly suitable for processing requirements that require frequent replacement of different tools, such as milling, turning, drilling, etc. It can be widely used in various fields such as mechanical manufacturing, mold manufacturing, and automotive parts processing. In the prior art, the tools in the tool changer are simply clamped on the tool holder. After long-term use and wear of the tool holder, the tool holder and the tool will become loose, and even the tool will fall off during tool changing. Moreover, during tool changing, the tool is likely to be separated from the tool holder due to too fast tool changing speed, which is not conducive to accelerating the tool changing speed. For example, in the existing patents, an automatic tool changing device disclosed in a Chinese patent document with the application number 201720155361.2 and an automatic tool changing device of a numerical control machining center disclosed in a Chinese patent document with the application number 202311313266.7.

[0003] Therefore, the defects are very obvious, and a solution is urgently needed. Summary of the Invention

[0004] In order to solve the above technical problems, the purpose of the present invention is to provide a tool changing device for milling processing.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A tool changing device for milling processing, which includes an outer cover, a tool changing disk rotatably arranged in the outer cover, a rotation driver installed on the outer cover and used to drive the tool changing disk to rotate, a plurality of tool holders detachably arranged on the tool changing disk, a plurality of locking structures arranged on the top surface of the tool changing disk, and a plurality of limiting mechanisms arranged on the bottom surface of the tool changing disk. The plurality of tool holders, the plurality of locking structures, and the plurality of limiting mechanisms are respectively arranged in one-to-one correspondence. The plurality of limiting mechanisms and the plurality of locking structures are respectively distributed in an arc shape around the rotation axis of the tool changing disk. The tool holders extend out of the edge of the tool changing disk in a cantilevered manner. The locking structures are used to lock the tool holders on the tool changing disk. The tool holders are used to store tools. The limiting mechanisms are used to limit the tools on the tool holders. An outlet opening is provided on one side of the outer cover, and the outlet opening is used for the tool to extend out of the outer cover. The outer end of the tool holder is recessed inward from the outside to form a bayonet for clamping the tool.

[0007] Further, the limiting mechanism includes two relatively arranged limiting plates and a limiting driving module installed on the bottom surface of the tool changer disk and used to drive the two limiting plates to approach or move away from each other. The two limiting plates project out of the edge of the tool changer disk in a cantilevered manner; the two limiting plates are used to limit the tool.

[0008] Further, the limiting driving module includes a sliding seat, two swing rods, and a linear driver. The linear driver is installed on the bottom surface of the tool changer disk. The sliding seat is slidably connected to the bottom surface of the tool changer disk. The linear driver is used to drive the sliding seat to reciprocate. The two swing rods are respectively arranged corresponding to the two limiting plates. The two ends of the swing rod are respectively hinged to the sliding seat and the inner end of the limiting plate. The inner ends of the two limiting plates are slidably connected to the bottom surface of the tool changer disk. The sliding direction of the sliding seat is arranged crosswise with the sliding direction of the limiting plate.

[0009] Further, a first sliding groove is radially arranged on the bottom surface of the tool changer disk. The sliding seat is provided with a first sliding block, and the first sliding block is slidably matched with the first sliding groove; two second sliding grooves are recessed on the bottom surface of the tool changer disk. The two second sliding grooves are on the same straight line, and the second sliding groove is perpendicular to the first sliding groove. The inner end of the limiting plate is provided with a second sliding block, and the second sliding block is slidably matched with the second sliding groove.

[0010] Further, a limiting block is convexly provided on one side surface of the two limiting plates facing each other. The limiting blocks on the two limiting plates are arranged in a staggered manner; when the two limiting plates approach each other, the two limiting blocks are superposed or spaced.

[0011] Further, a positioning column is convexly provided on the top surface of the tool changer disk, and a positioning hole is provided on the tool holder. The positioning column can be inserted into the positioning hole.

[0012] Further, the locking structure includes a sliding sleeve fixedly arranged on the top surface of the tool changer disk, a sliding rod slidably penetrating through the sliding sleeve, an insertion block arranged at one end of the sliding rod close to the tool holder, and a locking member used to lock the sliding rod on the sliding sleeve. The sliding rod is slidably matched with the sliding sleeve. A slot is provided at the inner end of the tool holder, and the insertion block can be inserted into the slot.

[0013] Further, a guide groove is provided at the inner end of the tool holder. The guide groove is recessed from the top wall of the slot. A guide block is convexly provided on the top surface of the insertion block. The guide block is in concave-convex fit with the guide groove; a guide post is arranged in the guide groove, and a guide hole is provided on the guide block. The guide post can be inserted into the guide hole.

[0014] Further, a limiting sliding groove is provided in the middle of the sliding rod, and a limiting rod penetrating through the limiting sliding groove is arranged in the middle of the sliding sleeve. The inner side wall of the limiting sliding groove is in sliding contact with the outer side wall of the limiting rod.

[0015] Further, the locking member is an elastic bolt disposed on the sliding sleeve. The unlocking hole and the locking hole are arranged in the length direction of the sliding rod. Both the unlocking hole and the locking hole communicate with the limiting chute. The unlocking hole and the locking hole are respectively located at both ends of the sliding rod. The unlocking hole is close to the inserting block. The pin shaft of the elastic bolt can be elastically pulled out or inserted into the unlocking hole or the locking hole.

[0016] Advantages of the present invention: In practical applications, the tool holder of the tool is clamped on the bayonet of the tool rest, so that the tool rest stores the tool, and the limiting mechanism limits the tool holder or the tool rod of the tool to ensure that the tool can be stably stored on the tool rest, avoiding loosening of the tool and the tool rest when the tool changer rotates to change the tool, preventing the problem of tool dropping during tool change, and at the same time being able to speed up the tool change speed; when tool change is required, the driver is rotated to drive the tool changer to rotate a preset angle, so that the tool rest storing the required tool rotates to the cutting port and extends out of the outer cover. When the tool changing manipulator picks up the tool, the limiting mechanism releases the limit on the tool, so that the tool changing manipulator can take the tool away from the tool rest and clamp the tool disassembled from the numerical control machine on the bayonet of the tool rest, and then the limiting mechanism limits the tool stored on the tool rest; when the corresponding tool rest needs to be replaced, the locking structure unlocks the tool rest, so that the tool rest can be disassembled from the tool changer, and then a new tool rest is installed on the tool changer, and the new tool rest is locked on the tool changer through the locking structure, which is convenient for replacing the tool rest. The present invention is convenient for replacing the tool rest, and the tool stored on the tool rest is limited by the limiting mechanism to prevent the tool from loosening from the tool rest and reducing the occurrence of accidental tool dropping accidents. Description of the Drawings

[0017] Figure 1 is a three-dimensional structure diagram of the present invention.

[0018] Figure 2 is a three-dimensional structure diagram of the present invention after hiding the outer cover.

[0019] Figure 3 is Figure 2 the enlarged view of part A in

[0020] Figure 4 is a three-dimensional structure diagram of another perspective of the present invention after hiding the outer cover.

[0021] Figure 5 is Figure 4 the enlarged view of part B in

[0022] Figure 6 is a three-dimensional structure diagram of the tool rest, the limiting mechanism and the tool of the present invention.

[0023] Figure 7 is a partial exploded view of the present invention.

[0024] Description of the Reference Numerals:

[0025] 1. Outer cover; 2. Tool changing disc; 3. Rotating driver; 4. Tool rest; 5. Locking structure; 6. Limiting mechanism; 7. Tool outlet; 8. Bayonet; 9. Limiting plate; 10. Limiting drive module; 11. Slide base; 12. Swing rod; 13. Linear driver; 14. First chute; 15. First slider; 16. Second chute; 17. Second slider; 18. Limiting block; 19. Positioning column; 20. Positioning hole; 21. Sleeve; 22. Slide bar; 23. Insert block; 24. Locking piece; 25. Slot; 26. Guide chute; 27. Guide block; 28. Guide post; 29. Guide hole; 30. Limiting chute; 31. Limiting rod; 32. Unlocking hole; 33. Locking hole; 34. Through hole; 35. Push-pull handle; 36. Baffle; 37. Tool. Detailed implementation manner

[0026] For the convenience of understanding by those skilled in the art, the present invention will be further described below in conjunction with embodiments and drawings. The content mentioned in the implementation manner does not limit the present invention.

[0027] As Figures 1 to 7 shown, a tool changing device for milling machining provided by the present invention includes an outer cover 1, a tool changing disc 2 rotatably arranged in the outer cover 1, a rotating driver 3 installed in the outer cover 1 and used to drive the rotation of the tool changing disc 2, a plurality of tool rests 4 detachably arranged on the tool changing disc 2, a plurality of locking structures 5 arranged on the top surface of the tool changing disc 2, and a plurality of limiting mechanisms 6 arranged on the bottom surface of the tool changing disc 2. The plurality of tool rests 4, the plurality of locking structures 5, and the plurality of limiting mechanisms 6 are respectively arranged in one-to-one correspondence. The plurality of limiting mechanisms 6 and the plurality of locking structures 5 are respectively distributed in an arc shape around the rotation axis of the tool changing disc 2. The tool rest 4 extends out of the edge of the tool changing disc 2 in a cantilever manner. The locking structure 5 is used to lock the tool rest 4 on the tool changing disc 2. The tool rest 4 is used to store the tool 37. The limiting mechanism 6 is used to limit the tool 37 on the tool rest 4. An outlet 7 is opened on one side of the outer cover 1, and the outlet 7 is used for the tool 37 to extend out of the outer cover 1. A bayonet 8 for clamping the tool 37 is recessed inward from the outer end of the tool rest 4.

[0028] In practical applications, the tool holder of the tool 37 is clamped on the bayonet 8 of the tool rest 4, so that the tool rest 4 stores the tool 37, and the limiting mechanism 6 limits the tool holder or the tool shank of the tool 37 to ensure that the tool 37 can be stably stored on the tool rest 4, avoid loosening of the tool 37 and the tool rest 4 when the tool changing disc 2 rotates to change the tool, prevent the problem of the tool 37 falling during tool change, and at the same time can speed up the tool change speed; when tool change is required, rotate the driver 3 to drive the tool changing disc 2 to rotate a preset angle, so that the tool rest 4 storing the required tool 37 rotates to the tool outlet 7 and extends outside the outer cover 1. When the tool changing manipulator picks up the tool 37, the limiting mechanism 6 releases the limit on the tool 37, so that the tool changing manipulator can take away the tool 37 from the tool rest 4, and clamp the tool 37 disassembled from the numerical control machine on the bayonet 8 of the tool rest 4. Then, the limiting mechanism 6 limits the tool 37 stored on the tool rest 4; when the corresponding tool rest 4 needs to be replaced, the locking structure 5 unlocks the tool rest 4, so that the tool rest 4 can be disassembled from the tool changing disc 2, and then a new tool rest 4 is installed on the tool changing disc 2, and the new tool rest 4 is locked on the tool changing disc 2 through the locking structure 5, which is convenient for replacing the tool rest 4. The present invention is convenient for replacing the tool rest 4, and limits the tool 37 stored on the tool rest 4 through the limiting mechanism 6, prevents the tool 37 from loosening from the tool rest 4, and reduces the occurrence of accidental accidents of the tool 37 falling.

[0029] In this embodiment, the limiting mechanism 6 includes two relatively arranged limiting plates 9 and a limiting driving module 10 installed on the bottom surface of the tool changing disc 2 and used for driving the two limiting plates 9 to approach or separate from each other. The two limiting plates 9 extend out of the edge of the tool changing disc 2 in a cantilevered manner; the two limiting plates 9 are used for limiting the tool 37.

[0030] In practical applications, the tool holder of the tool 37 is clamped on the bayonet 8 of the tool rest 4, the tool rest 4 stores the tool 37, and the limiting driving module 10 drives the two limiting plates 9 to approach until the two limiting plates 9 cooperate to limit the tool holder or the tool shank of the tool 37, so that the tool 37 can be stably stored on the tool rest 4.

[0031] In this embodiment, the limiting driving module 10 includes a sliding seat 11, two swing rods 12 and a linear driver 13. The linear driver 13 is installed on the bottom surface of the tool changing disc 2. The sliding seat 11 is slidably connected to the bottom surface of the tool changing disc 2. The linear driver 13 is used for driving the sliding seat 11 to reciprocate. The two swing rods 12 are respectively arranged in one-to-one correspondence with the two limiting plates 9. The two ends of the swing rod 12 are respectively hinged to the sliding seat 11 and the inner end of the limiting plate 9. The inner ends of the two limiting plates 9 are slidably connected to the bottom surface of the tool changing disc 2. The sliding direction of the sliding seat 11 and the sliding direction of the limiting plate 9 are arranged in a cross manner. Specifically, the linear driver 13 can adopt a cylinder or a linear motor, etc., and the sliding direction of the sliding seat 11 is perpendicular to the sliding direction of the limiting plate 9.

[0032] In practical applications, the two limit plates 9 approach each other to limit the tool holder or tool shank of the tool 37. When it is necessary to release the limit on the tool 37, the linear actuator 13 drives the slide 11 to move radially outward along the turret 2. The outward-moving slide 11 drives the two swing rods 12 to move outward. Since the two ends of the swing rod 12 are respectively hinged to the slide 11 and the limit plate 9, and the limit plate 9 can slide relative to the turret 2 along a direction perpendicular to the radial direction of the turret 2, as the swing rod 12 moves outward, the swing rod 12 will swing. The two swing rods 12 that move outward and swing will drive the two limit plates 9 away from each other, so that the two limit plates 9 release the limit on the tool 37. When it is necessary to limit the tool 37, the linear actuator 13 drives the slide 11 and the two swing rods 12 to move inward and swing. The two swing rods 12 that move inward and swing will drive the two limit plates 9 to approach each other until the two limit plates 9 limit the tool 37.

[0033] In this embodiment, a first chute 14 is radially provided on the bottom surface of the turret 2, a first slider 15 is provided on the slide 11, and the first slider 15 is slidably engaged with the first chute 14. Two second chutes 16 are recessed on the bottom surface of the turret 2. The two second chutes 16 are on the same straight line, and the second chute 16 is perpendicular to the first chute 14. A second slider 17 is provided at the inner end of the limit plate 9, and the second slider 17 is slidably engaged with the second chute 16. During the process of the linear actuator 13 driving the slide 11 to reciprocate, the first slider 15 of the slide 11 is slidably engaged with the first chute 14 of the turret 2 to improve the stability of the movement of the slide 11. And as the swing rod 12 moves and swings, the second slider 17 of the limit plate 9 will slide along the second chute 16, so that the two limit plates 9 approach or move away from each other. This structural design improves the working stability of the limiting mechanism 6.

[0034] In this embodiment, a limit block 18 is convexly provided on one side surface of each of the two limit plates 9 that approach each other, and the limit blocks 18 on the two limit plates 9 are arranged in a staggered manner; when the two limit plates 9 approach each other, the two limit blocks 18 are arranged in an overlapping manner or at a certain distance.

[0035] In practical applications, when the two limit plates 9 are completely closed, the limit block 18 of one limit plate 9 abuts against the inner side wall of the other limit plate 9 to limit the extreme closing position of the two limit plates 9, avoiding the hard impact and collision on the tool 37 caused by the excessive closing of the two limit plates 9, and also avoiding damage to the tool 37. And when the two limit plates 9 are completely closed, the two limit blocks 18 are overlapped together, and the two overlapped limit blocks 18 limit the tool holder or tool shank of the tool 37 within the two limit plates 9, or the two limit blocks 18 are arranged at a distance, and the tool holder or tool shank of the tool 37 is located between the two limit blocks 18 to realize the limitation of the tool 37.

[0036] In this embodiment, a positioning column 19 is convexly provided on the top surface of the tool changer 2, and a positioning hole 20 is provided on the tool holder 4, and the positioning column 19 can be inserted into the positioning hole 20. When the tool changer 2 and the tool holder 4 are assembled, the positioning column 19 of the tool changer 2 is inserted into the positioning hole 20 of the tool holder 4, which not only plays a positioning role in the assembly of the tool holder 4 and the tool changer 2, but also improves the firmness of the assembly of the tool holder 4 and the tool changer 2.

[0037] In this embodiment, the locking structure 5 includes a sleeve 21 fixedly arranged on the top surface of the tool changing disc 2, a slide rod 22 slidingly passing through the sleeve 21, an insert block 23 arranged at one end of the slide rod 22 close to the tool holder 4, and a locking piece 24 for locking the slide rod 22 on the sleeve 21. The slide rod 22 is slidably matched with the sleeve 21, and a slot 25 is arranged at the inner end of the tool holder 4, and the insert block 23 can be inserted into the slot 25.

[0038] When the locking structure 5 locks the tool holder 4 on the tool changer 2, the positioning column 19 of the tool changer 2 is inserted into the positioning hole 20 of the tool holder 4, the insert block 23 is inserted into the slot 25 of the tool holder 4, and the locking piece 24 locks the slide bar 22 on the slide sleeve 21; when the tool holder 4 needs to be disassembled, the locking piece 24 releases the slide bar 22, so that the slide bar 22 can slide relative to the slide sleeve 21, and at this time, an inward force is applied to the slide bar 22, so that the slide bar 22 moves inward relative to the slide sleeve 21, and the inward movement The slide bar 22 drives the insert block 23 to move out of the knife groove of the knife holder 4, and then the knife holder 4 can be disassembled upward from the knife changer 2; when the knife holder 4 needs to be assembled, the positioning hole 20 of the knife holder 4 is first inserted into the positioning column 19 of the knife changer, and then the slide bar 22 is moved outward, so that the slide bar 22 drives the insert block 23 to move outward until the insert block 23 is completely inserted into the slot 25, and finally the slide bar 22 is locked on the sliding sleeve 21 by the locking piece 24, so that the knife holder 4 is locked on the knife changer 2. This structural design facilitates the disassembly and assembly of the knife holder 4.

[0039] In this embodiment, a guide groove 26 is provided at the inner end of the tool holder 4, and the guide groove 26 is recessed from the top wall of the slot 25. A guide block 27 is convexly provided on the top surface of the insert block 23, and the guide block 27 is concavely matched with the guide groove 26; a guide column 28 is provided in the guide groove 26, and a guide hole 29 is opened in the guide block 27, and the guide column 28 can be inserted into the guide hole 29. When the slide bar 22 drives the insert block 23 to move outward, not only the insert block 23 is inserted into the slot 25, but the guide block 27 is also inserted into the guide groove 26, and the guide hole 29 of the guide block 27 is also inserted into the outside of the guide column 28 in the guide groove 26. The inner wall of the guide hole 29 contacts the outer wall of the guide column 28, thereby ensuring the position accuracy and stability of the insert block 23 inserted into the slot 25, and the guide hole 29 limits the guide column 28. Compared with relying solely on the locking piece 24 to lock the slide bar 22 on the sleeve 21, the firmness of the locking structure 5 to lock the tool holder 4 is further improved, so that the tool holder 4 assembled on the tool changing disc 2 is more stable and will not loosen.

[0040] Specifically, a push-pull handle 35 is provided on the top surface of the guide block 27; the push-pull handle 35 is for the operator's fingers to push and pull the guide block 27, so as to facilitate pushing and pulling the sliding rod 22 to reciprocate, which saves time and effort and is convenient to operate.

[0041] In this embodiment, a limit sliding groove 30 is provided in the middle of the sliding rod 22, and a limit rod 31 passing through the limit sliding groove 30 is provided inside the middle of the sliding sleeve 21. The inner side wall of the limit sliding groove 30 slidably abuts against the outer side wall of the limit rod 31. When the sliding rod 22 slides relative to the sliding sleeve 21, the limit sliding groove 30 slides along the limit rod 31, which further improves the stability of the sliding rod 22 sliding relative to the sliding sleeve 21, and the length of the limit sliding groove 30 limits the sliding stroke of the sliding rod 22 to prevent the sliding rod 22 from sliding excessively and detaching from the sliding sleeve 21.

[0042] In this embodiment, the locking member 24 is an elastic plug provided on the sliding sleeve 21. An unlocking hole 32 and a locking hole 33 are provided in the length direction of the sliding rod 22. Both the unlocking hole 32 and the locking hole 33 communicate with the limit sliding groove 30. The unlocking hole 32 and the locking hole 33 are respectively located at both ends of the sliding rod 22. The unlocking hole 32 is close to the insertion block 23. The pin shaft of the elastic plug can be elastically pulled out or inserted into the unlocking hole 32 or the locking hole 33.

[0043] When the insertion block 23 is inserted into the insertion slot 25 to lock the tool rest 4, the pin shaft of the elastic plug is inserted into the locking hole 33; when the tool rest 4 needs to be disassembled, the elastic plug is pulled, so that the pin shaft of the elastic plug is pulled out from the locking hole 33, and then an inward thrust is applied to the sliding rod 22, so that the sliding rod 22 drives the insertion block 23 to move inward, so that the insertion block 23 is pulled out from the insertion slot 25 until the unlocking hole 32 corresponds to the pin shaft of the elastic plug, and the pulling force on the elastic plug is released. The pin shaft of the elastic plug is inserted into the unlocking hole 32 under the action of elastic force to lock the sliding rod 22 in the unlocked state, which is convenient for the disassembly, assembly and replacement of the tool rest 4. With this structural design, the disassembly and assembly of the tool rest 4 can be easily realized without disassembly and assembly tools, and the disassembly and assembly are convenient, easy and efficient.

[0044] Specifically, through holes 34 are provided on both the limit rod 31 and the sliding sleeve 21. The through holes 34 are used to communicate coaxially with the unlocking hole 32 or the locking hole 33, and the pin shaft of the elastic plug can be inserted into the through hole 34. With this structural design, not only the structures of the elastic plug, the limit rod 31, the sliding rod 22 and the sliding sleeve 21 are compact, but also it is beneficial to lock the sliding rod 22 in the unlocked state or the locked state. When the pin shaft of the elastic plug is inserted into the unlocking hole 32, the sliding rod 22 is in the unlocked state, and when the pin shaft of the elastic plug is inserted into the locking hole 33, the sliding rod 22 is in the locked state.

[0045] Specifically, a baffle 36 is provided on one side of the eccentric position of the tool changing disc 2. The baffle 36 is in concave-convex fit with the tool outlet 7. The baffle 36 is used to close or open the tool outlet 7, and the baffle 36 can rotate into the outer cover 1. When the present invention is in an unused state, in order to prevent sundries from entering the outer cover 1, the baffle 36 is located at the tool outlet 7 and closes the tool outlet 7 to encapsulate structures such as the tool changing disc 2 and the tool 37 in the outer cover 1, playing a protective role; when tool changing is required, the rotation driver 3 is rotated to drive the tool changing disc 2 to drive the baffle 36 to rotate synchronously. When the tool changing disc 2 rotates the tool 37 to the tool outlet 7, the baffle 36 can rotate into the outer cover 1.

[0046] Specifically, the outer cover 1 is an arc-shaped cover larger than a semi-circle, that is, the outer cover 1 is generally in a shape structure obtained by longitudinally cutting a part at the eccentric position of a cylinder. An arc-shaped hole communicating with the tool outlet 7 is provided inside the outer cover 1. The tool changing disc 2 is an arc-shaped disc larger than a semi-circle. The outer cover 1 and the tool changing disc 2 are coaxially arranged. The radian of the arc-shaped cover, the radian of the arc-shaped disc, and the radian of the arc-shaped hole are the same. The radian of the arc-shaped hole is greater than π. The tool outlet 7 forms a section plane of the arc-shaped hole. The length of the section plane is less than the diameter of the arc-shaped hole. The diameter of the arc-shaped disc is less than the length of the section plane. An arc-shaped channel for the tool 37 stored in the tool holder 4 to rotate is provided between the edge of the arc-shaped disc and the inner arc surface of the arc-shaped hole. This structural design is novel, with a beautiful and compact appearance, and is conducive to the baffle 36 rotating into the outer cover 1 or the baffle 36 closing the tool outlet 7, and is also conducive to smooth tool changing.

[0047] Specifically, the rotation driver 3 can adopt a motor. The rotation driver 3 is arranged outside or inside the outer cover 1; when the rotation driver 3 is arranged outside the outer cover 1, the rotating shaft of the rotation driver 3 rotates into the outer cover 1 and is fixedly connected to the central position of the tool changing disc 2. When the rotation driver 3 is arranged outside the outer cover 1, the volume of the outer cover 1 can be reduced, which is conducive to the heat dissipation of the rotation driver 3; when the rotation driver 3 is arranged inside the outer cover 1, the outer cover 1 plays a protective role for the rotation driver 3, preventing the rotation driver 3 from being exposed to the environment for a long time, and the appearance is simple and beautiful.

[0048] All technical features in this embodiment can be freely combined according to actual needs.

[0049] The above embodiments are preferred implementation solutions of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the technical solution of the present invention is within the protection scope of the present invention.

Claims

1. A tool changing device for milling machining, characterized in that: It includes an outer cover (1), a tool-changing disc (2) rotatably arranged inside the outer cover (1), a rotation driver (3) installed on the outer cover (1) and used to drive the rotation of the tool-changing disc (2), a plurality of tool holders (4) detachably arranged on the tool-changing disc (2), a plurality of locking structures (5) arranged on the top surface of the tool-changing disc (2), and a plurality of limiting mechanisms (6) arranged on the bottom surface of the tool-changing disc (2). The plurality of tool holders (4), the plurality of locking structures (5), and the plurality of limiting mechanisms (6) are respectively arranged in one-to-one correspondence. The plurality of limiting mechanisms (6) and the plurality of locking structures (5) are respectively distributed in an arc shape around the rotation axis of the tool-changing disc (2). The tool holder (4) extends outwards in a cantilevered manner beyond the edge of the tool-changing disc (2). The locking structure (5) is used to lock the tool holder (4) on the tool-changing disc (2). The tool holder (4) is used to store the tool (37). The limiting mechanism (6) is used to limit the tool (37) on the tool holder (4). An outlet opening (7) is provided on one side of the outer cover (1). The outlet opening (7) is used for the tool (37) to extend out of the outer cover (1). The outer end of the tool holder (4) is recessed inwards from the outside to form a bayonet (8) for clamping the tool (37).

2. The milling tool changing device according to claim 1, characterized in that: The limiting mechanism (6) includes two relatively arranged limiting plates (9) and a limiting drive module (10) installed on the bottom surface of the tool-changing disc (2) and used to drive the two limiting plates (9) to approach or move away from each other. The two limiting plates (9) extend outwards in a cantilevered manner beyond the edge of the tool-changing disc (2). The two limiting plates (9) are used to limit the tool (37).

3. The milling tool changing device according to claim 2, wherein: The limiting drive module (10) includes a sliding seat (11), two swing rods (12), and a linear driver (13). The linear driver (13) is installed on the bottom surface of the tool-changing disc (2). The sliding seat (11) is slidably connected to the bottom surface of the tool-changing disc (2). The linear driver (13) is used to drive the sliding seat (11) to reciprocate. The two swing rods (12) are respectively arranged in one-to-one correspondence with the two limiting plates (9). The two ends of the swing rod (12) are respectively hinged to the sliding seat (11) and the inner end of the limiting plate (9). The inner ends of the two limiting plates (9) are slidably connected to the bottom surface of the tool-changing disc (2). The sliding direction of the sliding seat (11) is arranged crosswise with the sliding direction of the limiting plate (9).

4. A milling tool changing device according to claim 3, characterized in that: A first sliding groove (14) is radially arranged on the bottom surface of the tool-changing disc (2). The sliding seat (11) is provided with a first sliding block (15). The first sliding block (15) is slidably matched with the first sliding groove (14). Two second sliding grooves (16) are recessed on the bottom surface of the tool-changing disc (2). The two second sliding grooves (16) are on the same straight line. The second sliding groove (16) is perpendicular to the first sliding groove (14). The inner end of the limiting plate (9) is provided with a second sliding block (17). The second sliding block (17) is slidably matched with the second sliding groove (16).

5. The milling machining tool changing device according to claim 3, wherein: Limiting blocks (18) are respectively convexly arranged on one side surface of the two limiting plates (9) facing each other. The limiting blocks (18) on the two limiting plates (9) are arranged in a staggered manner. When the two limiting plates (9) approach each other, the two limiting blocks (18) are arranged in an overlapping manner or at a certain distance.

6. The milling tool changing device according to claim 1, characterized in that: Positioning columns (19) are convexly arranged on the top surface of the tool-changing disc (2). Positioning holes (20) are provided on the tool holder (4). The positioning columns (19) can be inserted into the positioning holes (20).

7. The milling tool changing device according to claim 6, characterized in that: The locking structure (5) includes a sliding sleeve (21) fixedly arranged on the top surface of the tool changing disc (2), a sliding rod (22) slidably penetrating through the sliding sleeve (21), a plug block (23) arranged at one end of the sliding rod (22) close to the tool holder (4), and a locking member (24) for locking the sliding rod (22) on the sliding sleeve (21). The sliding rod (22) is in sliding fit with the sliding sleeve (21). A slot (25) is arranged at the inner end of the tool holder (4), and the plug block (23) can be inserted into the slot (25).

8. The milling tool change device according to claim 7, characterized in that: A guide groove (26) is arranged at the inner end of the tool holder (4). The guide groove (26) is recessed from the top wall of the slot (25). A guide block (27) protrudes from the top surface of the plug block (23), and the guide block (27) is in concave-convex fit with the guide groove (26). A guide post (28) is arranged in the guide groove (26), and a guide hole (29) is formed in the guide block (27), and the guide post (28) can be inserted into the guide hole (29).

9. The milling tool changing device according to claim 7, characterized in that: A limiting chute (30) is arranged in the middle of the sliding rod (22), and a limiting rod (31) penetrating through the limiting chute (30) is arranged in the middle of the sliding sleeve (21). The inner side wall of the limiting chute (30) is in sliding contact with the outer side wall of the limiting rod (31).

10. A milling tool change device according to claim 8, characterized in that: The locking member (24) is an elastic plug arranged on the sliding sleeve (21). An unlocking hole (32) and a locking hole (33) are arranged in the length direction of the sliding rod (22). Both the unlocking hole (32) and the locking hole (33) communicate with the limiting chute (30). The unlocking hole (32) and the locking hole (33) are respectively located at both ends of the sliding rod (22). The unlocking hole (32) is arranged close to the plug block (23). The pin shaft of the elastic plug can be elastically pulled out or inserted into the unlocking hole (32) or the locking hole (33).

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