A tool shank positioning device

Abstract

The application discloses a tool shank positioning device capable of quickly replacing a tool, and relates to the field of machine tool equipment. The tool shank positioning device capable of quickly replacing a tool comprises a base, a positioning groove formed in the base, a plurality of clamping petals arranged in the positioning groove and capable of being relatively opened or folded, an execution assembly for driving the plurality of clamping petals to be relatively opened, and an auxiliary assembly for assisting in driving the plurality of clamping petals to be relatively folded. The auxiliary assembly comprises a driving ring arranged around the plurality of clamping petals, the driving ring is movably arranged along the axial direction of the positioning groove, a first driving groove is annularly formed in the inner circumferential side of the driving ring, the outer side of each clamping petal is respectively provided with a matching part, and the plurality of matching parts are all accommodated in the first driving groove. The tool shank positioning device can realize quick replacement of a tool shank, and the efficiency of tool replacement is greatly improved without waiting for the plurality of clamping petals to be automatically restored.

Description

Technical Field

[0001] This application relates to the field of machine tool equipment technology, and in particular to a tool holder positioning device for quick tool changing. Background Technology

[0002] A tool holder positioner is a positioning device used to clamp tool holders. It is installed on a machine tool to clamp the tool holder, on which a cutting tool or workpiece can be mounted to complete the machining process.

[0003] In existing technologies, tool holder clamping is generally achieved through multiple clamping flaps. The lower end of the tool holder has a mounting opening that fits around the periphery of the clamping flaps. During clamping, a drive head approaches and presses against the clamping flaps, causing them to open relative to each other and press against the inner periphery of the mounting opening, thus clamping the tool holder. During unlocking, the drive head moves away from the clamping flaps, and the flaps, under their own deformation-restoring force, close relative to each other, releasing the clamping force and unlocking the tool holder, which can then be removed.

[0004] However, due to the weak deformation recovery force of the clamping flap, it takes a long time for it to recover on its own. The tool holder can only be unlocked after the clamping flap has recovered, which greatly reduces the efficiency of tool holder replacement. Summary of the Invention

[0005] To overcome the shortcomings of the prior art, this application provides a tool holder positioning device that enables quick tool changing.

[0006] The tool holder positioning device provided in this application adopts the following technical solution: A tool holder positioning device for quick tool change includes a base, a positioning groove formed on the base, a plurality of clamping flaps that can be opened or closed relative to each other and disposed in the positioning groove, and an actuation component for driving the plurality of clamping flaps to open relative to each other. The tool holder positioning device also includes an auxiliary component for assisting in driving the plurality of clamping flaps to close relative to each other. The auxiliary component includes a drive ring circumferentially disposed around the plurality of clamping flaps. The drive ring is movably disposed along the axial direction of the positioning groove. A first drive groove is circumferentially formed on the inner circumferential side of the drive ring. A mating part is respectively provided on the outer side of each of the clamping flaps, and the plurality of mating parts are all accommodated in the first drive groove.

[0007] By adopting the above technical solution, multiple clamping flaps can quickly close under the relative action of the drive ring and the mating part, thereby enabling rapid tool holder replacement without waiting for multiple clamping flaps to self-recover, which greatly improves tool changing efficiency.

[0008] Preferably, a support seat is coaxially connected in the positioning groove, a first elastic element is provided on the support seat, and the driving ring is suspended on the support seat and connected to the first elastic element.

[0009] By adopting the above technical solution, multiple clamping flaps can squeeze the first elastic element when they are relatively open, so that the first elastic element can have sufficient rebound force. This allows the drive ring to quickly push the mating part under the action of the first elastic element and realize the rapid closing of multiple clamping flaps, further improving the tool changing efficiency.

[0010] Preferably, the support base has a mounting portion at one end near the clamping flap, the first elastic element is annular and surrounds the periphery of the mounting portion, and the drive ring is suspended on the mounting portion and coaxially connected to the first elastic element.

[0011] By adopting the above technical solution, the first elastic element can extend and retract along the axial direction of the mounting part, thus preventing the drive ring from shifting during movement and affecting its auxiliary closing effect on multiple clamping petals.

[0012] Preferably, the support base has a coaxial groove, and the actuating component includes a first drive seat slidably disposed in the groove, a first drive shaft disposed on the first drive seat, and a first drive head disposed at the end of the first drive shaft. The first drive shaft passes through the plurality of clamping flaps, and the first drive head can slide along the direction from the clamping flaps to the support base to open the plurality of clamping flaps, or slide along the direction from the support base to the clamping flaps to disengage from the plurality of clamping flaps. The first elastic element is connected to the end of the drive ring away from the first drive head.

[0013] By adopting the above technical solution, the first driving head can gradually push the multiple clamping petals outward as it approaches the clamping petals, so as to lock the tool holder with the multiple clamping petals and compress the first elastic element; when the first driving head moves away from the clamping petals, the first elastic element can quickly recover and push the driving ring, which pushes the clamping petals, so that the multiple clamping petals can quickly close and unlock the tool holder.

[0014] Preferably, the positioning groove includes a first groove and a second groove located at both ends of the support base, the plurality of clamping flaps are disposed in the first groove, and the execution component further includes a second drive seat slidably disposed in the second groove and a second drive shaft disposed on the second drive seat. The first drive seat has a second drive groove, and the second drive shaft can be inserted into or disengaged from the second drive groove.

[0015] By adopting the above technical solution, the second drive shaft can gradually drive the first drive seat during the insertion or disengagement of the second drive slot, so that the first drive head can more smoothly squeeze or disengage from multiple clamping petals, preventing the first drive head from damaging the clamping petals; at the same time, the second drive seat can start in advance and gradually push the first drive seat before the end of processing, further improving the tool holder assembly and disassembly efficiency.

[0016] Preferably, the second drive groove has multiple limiting openings circumferentially formed on its groove wall, and each limiting opening is provided with a movable limiting block. The multiple limiting blocks can pass through the limiting opening and abut against the peripheral side of the second drive shaft.

[0017] By adopting the above technical solution, the second drive shaft can be positioned in the second drive groove under the action of multiple limit blocks, which effectively improves the driving effect of the second drive shaft on the first drive seat.

[0018] Preferably, the end of the second drive shaft is provided with a second drive head, the diameter of the second drive head gradually increases along the direction from the second drive seat to the first drive seat, and the limiting block has a first mating surface on the side near the second drive head. The first mating surface is an inclined surface, and the plurality of the first mating surfaces are slidably attached to the periphery of the second drive head.

[0019] By adopting the above technical solution, multiple limiting blocks can gradually retract during the process of the second driving head being inserted into the second driving groove. The relatively retracted multiple limiting blocks can gradually press against the periphery of the second driving head to limit the second driving head. At the same time, the second driving head can gradually squeeze the multiple limiting blocks during the process of disengaging from the second driving groove, so that the multiple limiting blocks open relatively. The relatively open multiple limiting blocks can press against the first driving seat in the opposite direction, thereby driving the first driving head to quickly squeeze the multiple clamping flaps, improving the opening efficiency of the multiple clamping flaps.

[0020] Preferably, a limiting part is further provided between the second drive shaft and the second drive head. The diameter of the limiting part gradually increases along the direction from the second drive shaft to the second drive head. The limiting block also has a limiting surface on the side near the second drive head. The limiting surface is an inclined surface. The first mating surface and the limiting surface are arranged along the direction from the second drive seat to the first drive seat. The plurality of limiting surfaces can respectively support the periphery of the limiting part.

[0021] By adopting the above technical solution, the second drive head can be positioned in the second drive groove with the cooperation of the limiting part and the limiting surface, which effectively improves the driving effect of the second drive shaft on the first drive seat; while the second drive head is disengaged from the second drive groove, the limiting part can squeeze the limiting surface and push the limiting block, so that multiple limiting blocks squeeze the first drive seat, thereby driving the first drive head to quickly squeeze multiple clamping flaps, improving the opening efficiency of multiple clamping flaps.

[0022] Preferably, the end of the slide near the second drive seat has a groove opening, the diameter of the groove opening gradually increases along the direction from the first drive seat to the second drive seat, and the side of the limiting block away from the second drive head is provided with a second mating surface, the second mating surface being an inclined surface, and multiple second mating surfaces are slidably attached to the inner wall of the groove opening.

[0023] By adopting the above technical solution, the limiting block can move along the inner wall of the slot with the cooperation of the second mating surface, so as to limit the second driving head or push the first driving seat during the movement.

[0024] Preferably, the second groove includes groove a and groove b located at both ends of the second drive seat. The base has a first gas channel communicating with groove a and a second gas channel communicating with groove b. A second elastic member is also provided in groove b, and the two ends of the second elastic member are connected to the support seat and the second drive seat, respectively.

[0025] By adopting the above technical solution, the second drive seat can slide under the cooperation of the first gas channel, the second gas channel and the second elastic element. The three cooperate with each other to realize the rapid opening or closing of multiple clamping petals, thereby realizing the rapid locking and unlocking of the tool holder. At the same time, the cooperation of the second gas channel and the second elastic element can effectively improve the locking strength of the tool holder.

[0026] In summary, the present invention has at least one of the following beneficial technical effects: Multiple clamping flaps can quickly retract under the relative action of the drive ring and the mating part, thereby enabling rapid tool holder replacement without waiting for the multiple clamping flaps to self-recover, greatly improving tool changing efficiency. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural schematic diagram of the tool holder positioning device in the embodiments of this application; Figure 2 This is a front view of the tool holder positioning device in the embodiments of this application; Figure 3 yes Figure 2 Schematic diagram of section AA in the diagram; Figure 4 This is a side view of the tool holder positioning device in the embodiments of this application; Figure 5 yes Figure 4 Schematic diagram of the BB section in the diagram; Figure 6 yes Figure 4 A schematic diagram of the CC section.

[0028] Marked in the attached diagram: 1. Base; 2. Positioning groove; 21. First groove; 22. Second groove; 221. Groove a; 222. Groove b; 3. Clamping flap; 31. Mating part; 32. Clamping part; 4. Actuating component; 41. First drive seat; 42. First drive shaft; 43. First drive head; 431. Drive part; 432. Holding part; 44. Second drive seat; 45. Second drive shaft; 46. Second drive groove; 47. Limiting port; 48. Second drive head; 49. Limiting part; 5. Auxiliary components; 51. Drive ring; 52. First drive groove; 53. First elastic element; 6. Support base; 61. Mounting part; 62. Slide groove; 63. Groove opening; 7. Limiting block; 71. First mating surface; 72. Limiting surface; 73. Second mating surface; 8. First gas channel; 9. Second gas channel; 10. Second elastic element; 11. First air inlet; 12. Second air inlet; 13. Support seat; 131. Support surface; 14. Detection hole; 15. Third gas channel; 16. Detection port; 17. Fourth gas channel; 18. Cleaning port; 100. Tool holder; 101. Assembly port. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-6 The present invention will be described in further detail below.

[0030] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0031] See Figure 1-6As shown, a tool holder positioning device for quick tool change is illustrated, including a base 1, a positioning groove 2 formed on the base 1, a plurality of clamping flaps 3 that can be opened or closed relative to each other and disposed in the positioning groove 2, an execution component 4 for driving the plurality of clamping flaps 3 to open relative to each other, and an auxiliary component 5 for assisting in driving the plurality of clamping flaps 3 to close relative to each other.

[0032] The positioning groove 2 is used to install the tool holder 100, which is the handle part of the tool. It can not only fix the workpiece through the adapter plate, but also directly connect to the tool. The lower end of the tool holder 100 has an assembly port 101. When inserted, the assembly port 101 is fitted around the outer periphery of multiple clamping petals 3. The multiple clamping petals 3 are arranged circumferentially around the positioning groove 2. The multiple clamping petals 3 have a certain deformation capability. They can open relatively under the action of the actuating component 4 and press against the inner periphery of the assembly port 101 to clamp the tool holder 100. After the actuating component 4 removes the drive of the multiple clamping petals 3, the multiple clamping petals 3 are relatively closed and disengaged from the inner wall of the assembly port 101 with the cooperation of the auxiliary component 5, thereby unlocking the tool holder 100.

[0033] In this embodiment, combined with Figure 3 As shown, the auxiliary component 5 includes a drive ring 51 circumferentially disposed around the multiple clamping flaps 3. The drive ring 51 is coaxially disposed with the positioning groove 2 and is movable along the axial direction of the positioning groove 2. A first drive groove 52 is circumferentially formed on the inner circumferential side of the drive ring 51, and a mating part 31 is respectively provided on the outer side of each clamping flap 3. The multiple mating parts 31 are all accommodated in the first drive groove 52. In this way, the multiple clamping flaps 3 can quickly close under the relative action of the drive ring 51 and the mating parts 31, thereby realizing the rapid replacement of the tool holder 100 without waiting for the multiple clamping flaps 3 to return to their original position, which greatly improves the tool changing efficiency.

[0034] Specifically, the mating part 31 is disposed at one end of the clamping petal 3, and the clamping part 32 is disposed on the outer side of the other end of the clamping petal 3. When the drive ring 51 moves along the direction from the mating part 31 to the clamping part 32, it can push the mating part 31. After the mating part 31 is pressed, it can drive the clamping part 32 to close. When the actuator 4 drives the multiple clamping parts 32 to open relative to each other, the mating part 31 squeezes the drive ring 51 under the drive of the clamping part 32, so that the drive ring 51 resets along the direction from the clamping part 32 to the mating part 31.

[0035] In this embodiment, a support seat 6 is coaxially connected within the positioning groove 2. A first elastic element 53 is provided on the support seat 6. The end of the support seat 6 near the clamping flaps 3 has a mounting portion 61. The first elastic element 53 is a wave spring, which is annular and surrounds the periphery of the mounting portion 61. A drive ring 51 is suspended on the mounting portion 61 and coaxially connected to the first elastic element 53. When the multiple clamping flaps 3 are relatively open, they can squeeze the first elastic element 53 through the interaction of the mating portion 31 and the drive ring 51, so that the first elastic element 53 can accumulate sufficient rebound force. Thus, when the multiple clamping flaps 3 close, the first elastic element 53 can quickly recover and drive the drive ring 51 to move. The drive ring 51 can quickly push the mating portion 31 under the action of the rebound force of the first elastic element 53 to assist the multiple clamping flaps 3 in achieving rapid closing, further improving the tool changing efficiency.

[0036] In this embodiment, a groove 62 is coaxially provided in the support base 6. The execution component 4 includes a first drive base 41 slidably disposed in the groove 62, a first drive shaft 42 disposed on the first drive base 41, and a first drive head 43 disposed at the end of the first drive shaft 42. The first drive shaft 42 passes through the multiple clamping flaps 3. The first drive head 43 can slide along the direction from the clamping flaps 3 to the support base 6 and open the multiple clamping flaps 3, or slide along the direction from the support base 6 to the clamping flaps 3 and disengage from the multiple clamping flaps 3. The first elastic member 53 is connected to the end of the drive ring 51 away from the first drive head 43.

[0037] As the first drive head 43 approaches the clamping flaps 3, it can gradually push the multiple clamping flaps 3 outward to lock the tool holder 100 and compress the first elastic element 53. When the first drive head 43 moves away from the clamping flaps 3, the first elastic element 53 can quickly return to its original state and push the drive ring 51. The drive ring 51 pushes the clamping flaps 3, causing the multiple clamping flaps 3 to quickly close, thereby quickly unlocking the tool holder 100.

[0038] The first drive head 43 includes a drive portion 431 and a holding portion 432 arranged along a direction away from the clamping flap 3. The diameter of the drive portion 431 gradually increases along the direction from the clamping flap 3 to the holding portion 432, and the diameter of the holding portion 432 is the same as the maximum diameter of the drive portion 431. The gradually increasing diameter of the drive portion 431 can more smoothly open the multiple clamping portions 32; while the holding portion 432 can continuously abut against the multiple clamping portions 32 after the drive portion 431 moves into place, keeping the multiple clamping portions 32 in the open state, thereby improving the clamping effect of the multiple clamping portions 32 on the tool holder 100.

[0039] In this embodiment, the positioning groove 2 includes a first groove 21 and a second groove 22 located at both ends of the support base 6. Multiple clamping flaps 3 are disposed in the first groove 21. The execution component 4 also includes a second drive seat 44 slidably disposed in the second groove 22 and a second drive shaft 45 disposed on the second drive seat 44. The first drive seat 41 has a second drive groove 46. The second drive shaft 45 can be inserted into or disengaged from the second drive groove 46. The second drive shaft 45 can gradually drive the first drive seat 41 during insertion into or disengagement from the second drive groove 46, so that the first drive head 43 can more smoothly squeeze or disengage from the multiple clamping flaps 3, preventing the first drive head 43 from damaging the clamping flaps 3. At the same time, the second drive seat 44 can start in advance and gradually push the first drive seat 41 before the end of processing, further improving the disassembly and assembly efficiency of the tool holder 100.

[0040] In this embodiment, a plurality of limiting ports 47 are provided on the groove wall of the second drive groove 46 around its own circumference. Each limiting port 47 is provided with a movable limiting block 7. The plurality of limiting blocks 7 are wedge-shaped blocks that can pass through the limiting port 47 and abut against the circumferential side of the second drive shaft 45.

[0041] A second drive head 48 is provided at the end of the second drive shaft 45. The diameter of the second drive head 48 gradually increases along the direction from the second drive seat 44 to the first drive seat 41. The limiting block 7 has a first mating surface 71 on one side near the second drive head 48. The first mating surface 71 is an inclined surface. Multiple first mating surfaces 71 are slidably attached to the periphery of the second drive head 48.

[0042] During the process of the second drive head 48 being inserted into the second drive groove 46, multiple limiting blocks 7 can gradually retract along the peripheral inclined surface of the second drive head 48. The relatively retracted multiple limiting blocks 7 can gradually press against the peripheral surface of the second drive head 48 to limit the second drive head 48. At the same time, during the process of the second drive head 48 being disengaged from the second drive groove 46, it can gradually squeeze the multiple limiting blocks 7 through its peripheral inclined surface, causing the multiple limiting blocks 7 to open relatively. The relatively opened multiple limiting blocks 7 can press the first drive seat 41 in the opposite direction. The first drive seat 41 drives the first drive head 43 to quickly squeeze the multiple clamping petals 3, improving the opening efficiency of the multiple clamping petals 3.

[0043] In this embodiment, a limiting portion 49 is further provided between the second drive shaft 45 and the second drive head 48. The diameter of the limiting portion 49 gradually increases along the direction from the second drive shaft 45 to the second drive head 48, wherein the maximum diameter of the limiting portion 49 is the same as the minimum diameter of the second drive head 48. The limiting block 7 also has a limiting surface 72 on one side near the second drive head 48. The limiting surface 72 is an inclined surface. The first mating surface 71 and the limiting surface 72 are arranged along the direction from the second drive seat 44 to the first drive seat 41, and the multiple limiting surfaces 72 can respectively support the periphery of the limiting portion 49. After the second drive head 48 is inserted into the second drive groove 46 and moves into place, it can be positioned in the second drive groove 46 with the cooperation of the limiting part 49 and the limiting surface 72, which effectively improves the driving effect of the second drive shaft 45 on the first drive seat 41. During the process of the second drive head 48 disengaging from the second drive groove 46, the limiting part 49 can assist in squeezing the limiting surface 72 and pushing the limiting block 7, so that multiple limiting blocks 7 gradually open and squeeze the first drive seat 41, thereby driving the first drive head 43 to quickly squeeze multiple clamping petals 3, improving the opening efficiency of multiple clamping petals 3.

[0044] In this embodiment, the end of the slide 62 near the second drive seat 44 has a groove 63. The diameter of the groove 63 gradually increases along the direction from the first drive seat 41 to the second drive seat 44. The side of the limiting block 7 away from the second drive head 48 is provided with a second mating surface 73. The second mating surface 73 is an inclined surface, and multiple second mating surfaces 73 are slidably attached to the inner wall of the groove 63. The limiting block 7 can move along the inner wall of the groove 63 with the cooperation of the second mating surface 73, so as to limit the second drive head 48 or push the first drive seat 41 during the movement.

[0045] In this embodiment, combined with Figure 3 and Figure 5As shown, the second groove 22 includes groove a221 and groove b222 located at both ends of the second drive seat 44. The base 1 has a first gas channel 8 communicating with groove a221 and a second gas channel 9 communicating with groove b222. A second elastic element 10 is also provided inside groove b222, with both ends connected to the support seat 6 and the second drive seat 44, respectively. A first air inlet 11 communicating with the first gas channel 8 and a second air inlet 12 communicating with the second gas channel 9 are respectively provided at the bottom end of the base 1. The second elastic element 10 consists of multiple springs arranged circumferentially around the positioning groove 2. The first gas channel 8 and the second gas channel 9 are used to introduce compressed air. The second drive seat 44 can slide with the cooperation of the first gas channel 8, the second gas channel 9 and the second elastic element 10. The three cooperate with each other to realize the rapid opening or closing of multiple clamping petals 3, thereby realizing the rapid locking and unlocking of the tool holder 100. At the same time, the cooperation of the second gas channel 9 and the second elastic element 10 can effectively improve the locking strength of the tool holder 100.

[0046] In this embodiment, combined with Figure 5 As shown, the slot of the positioning groove 2 is also connected to a support base 13 for supporting the tool holder 100. The support base 13 has a support surface 131, and a detection hole 14 is opened on the support surface 131. The base 1 also has a third gas channel 15 communicating with the detection hole 14. The end of the third gas channel 15 away from the detection hole 14 has a detection port 16. When the tool holder 100 is inserted into the support base 13, if the tool holder 100 is clamped, its peripheral part can press against the support surface 131 and block the detection hole 14. If the tool holder 100 is not clamped, there will inevitably be a gap between it and the support surface 131, and the peripheral part of the tool holder 100 cannot completely block the detection hole 14. In this way, by simply connecting a gas flow sensor to the detection port 16, the clamping state of the tool holder 100 can be effectively detected and adjusted by the gas flow in the third gas channel 15, avoiding the tool holder 100 from being affected by an unstable fixation.

[0047] In this embodiment, combined with Figure 6 As shown, the base 1 also has multiple fourth gas channels 17, which are connected to the first tank 21. A cleaning port 18 connected to the multiple fourth gas channels 17 is provided at the bottom of the base 1. The multiple fourth gas channels 17 are used to introduce compressed air into the first tank 21 to clean up debris that falls into the first tank 21.

[0048] The implementation principle of the tool holder positioning device in this application embodiment is as follows: When disassembling the tool holder 100, compressed air is input into the first gas channel 8 through the first air inlet 11. The compressed air enters the groove a221 through the first gas channel 8 and pushes the second drive seat 44 to slide towards the first drive seat 41. During the sliding process, the second drive head 48 gradually inserts into the second drive groove 46 and pushes the first drive seat 41. Multiple limit blocks 7 gradually close and abut against the second drive head 48. Under the action of the thrust, the first drive head 43 disengages from multiple clamping petals 3. After the first elastic element 53 loses the squeezing force, it returns to its original state and pushes the drive ring 51. During its movement, the drive ring 51 pushes the mating part 31. The mating part 31 drives the clamping part 32 to close quickly, thereby realizing the quick unlocking of the tool holder 100. At this time, the tool holder 100 can be easily taken out from the positioning groove 2. When installing the tool holder 100, insert the tool holder 100 into the positioning groove 2. Then, the first air inlet 11 is shut off, and compressed air is simultaneously input into the second gas channel 9 through the second air inlet 12. The compressed air enters the groove b222 through the second gas channel 9 and cooperates with the second elastic element 10 to push the second drive seat 44 to slide away from the first drive seat 41. During the sliding process, the second drive head 48 squeezes multiple limit blocks 7. The multiple limit blocks 7 open relative to each other and squeeze the first drive seat 41. Under the action of the limit blocks 7, the first drive head 43 squeezes multiple clamping petals 3. Under the squeezing action, the multiple clamping petals 3 open relative to each other and lock the tool holder 100.

[0049] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A tool holder positioning device for quick tool change, comprising a base (1), a positioning groove (2) formed on the base (1), a plurality of clamping flaps (3) that can be opened or closed relative to each other and disposed in the positioning groove (2), and an actuating component (4) for driving the plurality of clamping flaps (3) to open relative to each other, characterized in that: The tool holder positioning device further includes an auxiliary component (5) for assisting in driving the multiple clamping flaps (3) to retract relative to each other. The auxiliary component (5) includes a drive ring (51) circumferentially disposed around the multiple clamping flaps (3). The drive ring (51) is movably disposed along the axial direction of the positioning groove (2). A first drive groove (52) is circumferentially opened on the inner circumferential side of the drive ring (51). A mating part (31) is respectively provided on the outer side of each clamping flap (3). The multiple mating parts (31) are all accommodated in the first drive groove (52). A support seat (6) is coaxially connected in the positioning groove (2). A first elastic element (53) is provided on the support seat (6). The drive ring (51) is suspended on the support seat (6) and connected to the first elastic element (53). The support seat (6) has a mounting part (61) near one end of the clamping flap (3). The first elastic element (53) is annular and surrounds the clamping flap (3). The drive ring (51) is suspended on the mounting part (61) and coaxially connected to the first elastic member (53) on the periphery of the mounting part (61). The support base (6) is coaxially provided with a sliding groove (62). The execution component (4) includes a first drive base (41) slidably disposed in the sliding groove (62), a first drive shaft (42) disposed on the first drive base (41), and a first drive head (43) disposed at the end of the first drive shaft (42). The first drive shaft (42) passes through the plurality of clamping petals (3). The first drive head (43) can slide along the direction from the clamping petals (3) to the support base (6) and open the plurality of clamping petals (3), or slide along the direction from the support base (6) to the clamping petals (3) and disengage from the plurality of clamping petals (3). The first elastic member (53) is connected to the end of the drive ring (51) away from the first drive head (43).

2. The tool holder positioning device for quick tool changing according to claim 1, characterized in that: The positioning groove (2) includes a first groove (21) and a second groove (22) located at both ends of the support base (6). A plurality of clamping flaps (3) are disposed in the first groove (21). The execution component (4) further includes a second drive seat (44) slidably disposed in the second groove (22) and a second drive shaft (45) disposed on the second drive seat (44). The first drive seat (41) has a second drive groove (46) and the second drive shaft (45) can be inserted into or disengaged from the second drive groove (46).

3. The tool holder positioning device for quick tool changing according to claim 2, characterized in that: The second drive groove (46) has multiple limiting ports (47) circumferentially opened on its groove wall. Each limiting port (47) is provided with a movable limiting block (7). The multiple limiting blocks (7) can pass through the limiting port (47) and abut against the circumferential side of the second drive shaft (45).

4. The tool holder positioning device for quick tool changing according to claim 3, characterized in that: The end of the second drive shaft (45) is provided with a second drive head (48). The diameter of the second drive head (48) gradually increases along the direction from the second drive seat (44) to the first drive seat (41). The limiting block (7) has a first mating surface (71) on one side near the second drive head (48). The first mating surface (71) is an inclined surface. The plurality of the first mating surfaces (71) are slidably attached to the periphery of the second drive head (48).

5. The tool holder positioning device for quick tool changing according to claim 4, characterized in that: A limiting part (49) is also provided between the second drive shaft (45) and the second drive head (48). The diameter of the limiting part (49) gradually increases along the direction from the second drive shaft (45) to the second drive head (48). The limiting block (7) near the side of the second drive head (48) also has a limiting surface (72). The limiting surface (72) is an inclined surface. The first mating surface (71) and the limiting surface (72) are arranged along the direction from the second drive seat (44) to the first drive seat (41). The multiple limiting surfaces (72) can support the periphery of the limiting part (49).

6. The tool holder positioning device for quick tool changing according to claim 4, characterized in that: The groove (62) has a slot (63) at one end near the second drive seat (44). The diameter of the slot (63) gradually increases along the direction from the first drive seat (41) to the second drive seat (44). The limiting block (7) has a second mating surface (73) on the side away from the second drive head (48). The second mating surface (73) is an inclined surface. Multiple second mating surfaces (73) are slidably attached to the inner wall of the slot (63).

7. A tool holder positioning device for quick tool changing according to claim 2, characterized in that: The second groove (22) includes groove a (221) and groove b (222) located at both ends of the second drive seat (44). The base (1) is provided with a first gas channel (8) communicating with groove a (221) and a second gas channel (9) communicating with groove b (222). A second elastic member (10) is also provided in groove b (222). The two ends of the second elastic member (10) are connected to the support seat (6) and the second drive seat (44) respectively.

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