Automatic tool changer mechanism and numerical control machine tool

Abstract

The present invention discloses an automatic tool changing mechanism and a numerical control machine tool, including a tool changing handle, and a tool clamping groove is formed at each of the two ends of the tool changing handle; the tool clamping groove is used for clamping a tool; a clamping ring is slidably arranged in the tool clamping groove along the thickness direction, and the clamping ring is used for being clamped into a clamping groove on the tool to fix the clamping tool; during tool changing, when the clamping ring is squeezed by the opening of the tool clamping groove of the tool, the clamping ring can adaptively slide so as to be clamped into the clamping groove; for the automatic tool changing mechanism and the numerical control machine tool provided by the present invention, in case of misalignment between the clamping ring and the clamping groove, when the clamping ring is squeezed by the opening of the tool clamping groove of the tool, the clamping ring can adaptively slide under the limit of the opening of the clamping groove so as to be clamped into the clamping groove, so that the clamping ring can be engaged with the clamping groove in a matching manner, thereby greatly improving the clamping effect on the tool, greatly reducing the occurrence of the situation that the tool is thrown out, and reducing potential safety hazards.

Description

Technical Field

[0001] The present invention relates to the technical field of numerical control machine tools, and particularly to an automatic tool changing mechanism and a numerical control machine tool. Background Art

[0002] With the progress of the times, industrial production is also innovating day by day. The use of machine tools has laid a relatively solid foundation for industrial development. A numerical control machine tool is an automated machine tool equipped with a program control system. Having advanced numerical control machine tool technology and equipment can improve the production efficiency, quality and flexibility of the manufacturing industry, promote industrial upgrading and transformation. The corresponding tools used are turning tools and a tool changing device for tool changing. The development of the tool changing mechanism can further improve the production efficiency of the numerical control machine tool.

[0003] For example, a Chinese patent with the authorization announcement number "CN114571273B" and the name "A tool clamping component and a tool changing mechanism" applied by the applicant in April 2022. This patent is provided with a cross bar, and a clamping head is symmetrically arranged at both ends of the cross bar about the center. Elastic parts are respectively arranged on both sides of the notch of the notch ring. The driving unit is used to drive the notch ring to rotate reciprocally, so that the notch of the notch ring can face at least two working positions, so that the cross bar can have the functions of clamping and loosening the tool in the process of rotating only in one direction.

[0004] The deficiencies of the prior art are as follows: In the prior art, during the use of the tool changing mechanism, for example, in the above patent, it can achieve the functions of clamping and loosening the tool by the notch ring during the process of rotating in one direction. However, the applicant found in actual use that when replacing the tool with the existing tool changing mechanism, if there is a position mismatch or deviation in the vertical direction between the tool slot and the clamping ring on the tool changing mechanism, it is difficult to stably clamp the tool on the lathe spindle and change the tool during tool changing. Therefore, when there is a position mismatch between the tool slot and the clamping ring on the tool changing mechanism as described above, the situation of the tool flying off after being clamped is likely to occur, which not only has a certain safety hazard, but also easily damages the tool tip. Summary of the Invention

[0005] The purpose of the present invention is to provide an automatic tool changing mechanism and a numerical control machine tool to solve the above deficiencies in the prior art.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] An automatic tool changing mechanism includes a tool changing handle, and a tool clamping groove is respectively formed at both ends of the tool changing handle; the tool clamping groove is used to clamp the tool; a clamping ring is slidably arranged in the tool clamping groove along the thickness direction, and the clamping ring is used to be clamped into a clamping groove on the tool to fix the clamped tool;

[0008] When changing the tool, when the snap ring is squeezed by the tool clamping groove opening, it can slide adaptively so as to be clamped into the clamping groove;

[0009] It further includes a fixing component arranged in the tool changing handle. When the snap ring is clamped in the clamping groove, it squeezes the fixing component to fix the snap ring.

[0010] As a further preferred solution in the embodiment of the present invention, a plurality of fixing blocks are arranged on the snap ring, and each of the fixing blocks is slidably arranged in a sliding groove opened on the tool changing handle;

[0011] It further includes an elastic member arranged in the sliding groove. Under its elastic force, the snap ring can be in the middle position of the tool clamping groove.

[0012] As a further preferred solution in the embodiment of the present invention, the elastic member includes a fifth elastic member. The fifth elastic member is arranged in the sliding groove, and one end of the fifth elastic member abuts in the sliding groove and the other end is fixedly connected to the fixing block.

[0013] As a further preferred solution in the embodiment of the present invention, the fixing component includes a sliding lock block slidably arranged on the snap ring. One end of the sliding lock block is provided with a first locking tooth, and a locking column is fixedly arranged in the tool changing handle. A second locking tooth is arranged on one side of the locking column. When the snap ring is clamped into the clamping groove, by squeezing the sliding locking block, the first locking tooth and the second locking tooth are engaged with each other to fix the snap ring.

[0014] As a further preferred solution in the embodiment of the present invention, it further includes a locking member arranged at the opening position of the tool clamping groove of the tool changing handle. The locking member is used to lock the tool in the tool clamping groove.

[0015] As a further preferred solution in the embodiment of the present invention, the locking member includes an elastic block slidably arranged along the long side direction of the tool changing handle. One end of the elastic block is fixedly provided with a second elastic member, and the other end of the second elastic member abuts in the tool changing handle.

[0016] As a further preferred solution in the embodiment of the present invention, a tightening component is arranged in the elastic block, and the tightening force of the tightening component acts in the tool clamping groove of the tool; the tightening component includes a locking block slidably arranged on the elastic block. One end of the locking block is provided with a first elastic member. One end of the first elastic member abuts on the elastic block and the other end abuts on the locking block. Under the elastic force of the first elastic member, the tightening block protrudes out of the elastic block.

[0017] In a further preferred embodiment of the present invention, a driving rod is slidably disposed within the elastic block, and a second fixing post is fixedly disposed at one end of the driving rod, and the second fixing post is inserted into a first elongated slot formed in the locking block.

[0018] In a further preferred embodiment of the present invention, a triggering mechanism is further included, and the triggering mechanism is in transmission connection with the elastic block through the driving rod;

[0019] The triggering mechanism has a locking position, an unlocking position, and a pressing position in the vertical direction respectively;

[0020] In the locking position, the triggering mechanism restricts the expansion and contraction of the elastic block through the driving rod;

[0021] In the unlocking position, the triggering mechanism releases the restriction so that the elastic block can expand and contract;

[0022] In the pressing position, the triggering mechanism presses against the locking block through the driving rod.

[0023] A numerical control machine tool includes the above automatic tool changing mechanism, and further includes a shaft box and a fixing disk, and a sealing disk is disposed within the shaft box, and the sealing disk and the mounting disk, and the mounting disk mounts the sealing disk to the fixing disk through a mounting component.

[0024] In the above technical solution, the beneficial effects of the automatic tool changing mechanism and the numerical control machine tool provided by the present invention are as follows:

[0025] By providing the movable snap ring and the fixing component, when in actual use, if the situation that the snap ring and the clamping groove are not aligned occurs, when the snap ring is squeezed by the opening of the tool clamping groove, the snap ring can adaptively slide under the limit of the opening of the clamping groove so as to be clamped into the clamping groove, so that the snap ring can be in snap fit with the clamping groove, thereby greatly improving the clamping effect on the tool. And by providing the fixing component, after the snap ring and the clamping groove are snap-fitted, the position of the snap ring in the vertical direction can be fixed, so that the stability of the snap ring after clamping the tool can be greatly improved, the occurrence of the situation that the tool is thrown out (tool throwing) can be greatly reduced, the potential safety hazard can be reduced, and the tool changing efficiency can be improved as a whole.

[0026] It should be understood that the foregoing general description and the following detailed description are merely exemplary and explanatory and are not intended to limit the present disclosure.

[0027] This application document provides an overview of various implementations or examples of the technology described in the present disclosure, and does not represent the full scope of the disclosed technology or a complete disclosure of all features. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the embodiments. Obviously, the drawings in the following description are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0029] Figure 1 Schematic diagram of the overall structure of the tool changing mechanism provided by the embodiment of the present invention;

[0030] Figure 2 Schematic diagram of the structure of the tool changing mechanism provided by the embodiment of the present invention;

[0031] Figure 3 Schematic diagram of the enlarged structure at A provided by the embodiment of the present invention;

[0032] Figure 4 Schematic diagram of the structure of the tool changing mechanism from another perspective provided by the embodiment of the present invention;

[0033] Figure 5 Schematic diagram of the structure of the triggering mechanism provided by the embodiment of the present invention;

[0034] Figure 6 Schematic diagram of the structure of the locking member provided by the embodiment of the present invention;

[0035] Figure 7 Schematic diagram of the structure of the snap ring and the sliding lock block provided by the embodiment of the present invention;

[0036] Figure 8 Schematic diagram of the cross-sectional structure of the tool holder provided by the embodiment of the present invention;

[0037] Figure 9 Schematic diagram of the cross-sectional structure of the elastic block provided by the embodiment of the present invention;

[0038] Figure 10 Schematic diagram of the structure of the locking member and the triggering mechanism provided by the embodiment of the present invention

[0039] Figure 11 Schematic diagram of the cross-sectional structure of the snap ring provided by the embodiment of the present invention

[0040] Figure 12 Schematic diagram of the cross-sectional structure of the tool holder and the snap ring provided by the embodiment of the present invention;

[0041] Figure 13 Schematic diagram of the structure of the axle box provided by the embodiment of the present invention;

[0042] Figure 14 Schematic diagram of the structure of the fixed disk, the sealing disk and the mounting disk provided by the embodiment of the present invention;

[0043] Figure 15 Schematic cross-sectional structure diagram provided by an embodiment of the present invention;

[0044] Figure 16 Enlarged structure diagram of part B provided by an embodiment of the present invention;

[0045] Figure 17 Schematic structure diagram of the installation component provided by an embodiment of the present invention;

[0046] Figure 18 Schematic structure diagram of the sealing disc provided by an embodiment of the present invention;

[0047] Figure 19 Schematic structure diagram of the mounting disc provided by an embodiment of the present invention.

[0048] Explanation of reference numerals:

[0049] 1. Tool changing handle; 11. Snap ring; 111. Sliding lock block; 1111. Fourth elastic member; 12. Locking post; 1112. First locking tooth; 121. Second locking tooth; 112. Fixed block; 1121. Fifth elastic member; 101. Tool clamping groove; 102. Sliding groove; 2. Tool; 21. Clamping groove; 3. Elastic block; 31. Locking block; 311. First elastic member; 312. Tightening block; 3101. First elongated groove; 32. Second elastic member; 33. Driving rod; 331. First fixing column; 332. Second fixing column; 103. Second elongated groove; 4. Movable column; 41. Partition surface; 42. Inclined extrusion surface; 43. Avoidance hole; 44. Third elastic member; 45. Pressing column;

[0050] 5. Axle box; 51. Bush; 52. Fixed disc; 521. Sealing gasket; 53. Sealing disc; 5301. Slot; 5302. Installation groove; 531. Driving column; 5311. Extrusion inclined surface; 5312. Bearing surface; 532. Fixed shaft; 5501. Limiting elongated groove; 5502. Second friction plate; 54. Mounting disc; 541. Clamping post; 5411. Clamping column; 55. Locking block; 551. Fixed resisting rod; 552. First friction plate; 56. Main shaft; 6. Sealing bearing. Detailed implementation manners

[0051] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. Apparently, the described embodiments are some but not all of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure.

[0052] Please refer to FIGS. 1-19, an automatic tool changing mechanism and a numerical control machine tool, including a tool changing handle 1, and a tool clamping groove 101 is formed at each end of the tool changing handle 1; the tool clamping groove 101 is used for clamping the tool 2; a clamping ring 11 is slidably arranged in the tool clamping groove 101 along the thickness direction, and the clamping ring 11 is used for being clamped to the clamping groove 21 on the tool 2 to fix the tool 2.

[0053] During tool changing, when the clamping ring 11 is squeezed by the opening of the clamping groove 21 of the tool 2, it can adaptively slide so as to be clamped into the clamping groove 21.

[0054] It further includes a fixing component arranged in the tool changing handle 1. When the clamping ring 11 is clamped in the clamping groove 21, the fixing component is squeezed to fix the clamping ring 11.

[0055] In the present invention, through the provided movable clamping ring 11 and the fixing component, when in specific use, if the situation that the clamping ring 11 and the clamping groove 21 are not aligned occurs, when the clamping ring 11 is squeezed by the opening of the clamping groove 21 of the tool 2, it can adaptively slide under the limit of the opening of the clamping groove 21 so as to be clamped into the clamping groove 21, thereby enabling the clamping ring 11 to be clamped with the clamping groove 21 in a matching manner, thus greatly improving the clamping effect on the tool 2. And through the provided fixing component, after the clamping ring 11 and the clamping groove 21 are clamped with each other, the position of the clamping ring 11 in the vertical direction can be fixed. Therefore, the stability of the clamping ring 11 after clamping the tool 2 can be greatly improved, the occurrence of the situation that the tool 2 is thrown out is greatly reduced, the safety hazard is reduced, and the tool changing efficiency is improved as a whole.

[0056] Specifically, the specific shape of the clamping ring 11 is as Figure 7 shown, its cross section is trapezoidal, and the matching clamping groove 21 is also trapezoidal.

[0057] In a further embodiment provided by the present invention, a plurality of fixing blocks 112 are arranged on the clamping ring 11, and each fixing block 112 is slidably arranged in a sliding groove 102 opened on the tool changing handle 1;

[0058] It further includes an elastic member arranged in the sliding groove 102. Under its elastic force, the clamping ring 11 can be in the middle position of the tool clamping groove 101.

[0059] In a further embodiment provided by the present invention, the elastic member includes a fifth elastic member 1121. The fifth elastic member 1121 is arranged in the sliding groove 102, and one end of the fifth elastic member 1121 abuts against the sliding groove 102 and the other end is fixedly connected to the fixing block 112.

[0060] In an embodiment further provided by the present invention, the fixing assembly includes a sliding locking block 111 slidably set on the retaining ring 11, and a first locking tooth 1112 is set at one end of the sliding locking block 111, and a locking column 12 is fixedly set in the tool changing handle 1, and a second locking tooth 121 is set on one side of the locking column 12. When the retaining ring 11 is clamped into the clamping groove 21, the sliding locking block 31 is squeezed to make the first locking tooth 1112 engage with the second locking tooth 121 to fix the retaining ring 11.

[0061] In an embodiment further provided by the present invention, a locking member is further provided at the opening position of the tool clamping slot 101 of the tool changing handle 1 , and the locking member is used to lock the tool in the tool clamping slot 101 .

[0062] In an embodiment further provided by the present invention, the locking member includes an elastic block 3 slidably arranged along the long side direction of the tool changing handle 1, and a second elastic member 32 is fixedly arranged at one end of the elastic block 3, and the other end of the second elastic member 32 abuts against the tool changing handle 1.

[0063] In an embodiment further provided by the present invention, a clamping assembly is arranged in the elastic block 3, and the clamping force of the clamping assembly acts in the clamping groove 21 of the tool 2; the clamping assembly includes a locking block 31 slidably arranged on the elastic block 3, and a first elastic member 311 is arranged at one end of the locking block 31, and one end of the first elastic member 311 abuts on the elastic block 3, and the other end abuts on the locking block 31, and under the elastic force of the first elastic member 311, the clamping block 312 protrudes to the elastic block 3.

[0064] The present invention provides a clamping assembly, which can make it possible for the tool 2 to be clamped in the clamping groove 21 of the tool 2 through the clamping assembly when the tool is changed, after being locked by the locking assembly, so that the tool 2 can be further clamped, which greatly improves the stability of the tool 2 on the tool changing mechanism and facilitates the replacement of the tool 2 on the spindle of the lathe.

[0065] In an embodiment further provided by the present invention, a driving rod 33 is slidably disposed in the elastic block 3 , and a second fixing column 332 is fixedly disposed at one end of the driving rod 33 , and the second fixing column 332 is inserted into the first elongated groove 3101 provided on the locking block 31 .

[0066] In an embodiment further provided by the present invention, a trigger mechanism is further included, and the trigger mechanism is transmission-connected to the elastic block 3 through a driving rod 33; the trigger mechanism has a locking position, an unlocking position and a pressing position in the vertical direction;

[0067] In the locked position, the trigger mechanism limits the extension and retraction of the elastic block 3 through the driving rod 33; in the unlocked position, the trigger mechanism releases the restriction so that the elastic block 3 can be extended and retracted;

[0068] In the tightened position, the triggering mechanism is tightened against the locking block 31 through the driving rod 33.

[0069] Through the provided triggering mechanism, the present invention enables the device to be locked and unlocked passively for the elastic block 3 following the stroke of the tool change shaft during use, that is, it can greatly improve the mobility and flexibility of the device.

[0070] Specifically, the triggering mechanism includes a movable column 4 slidably arranged along the thickness direction of the tool change handle 1, and an avoidance hole 43 is formed in the movable column 4. When one end of the driving rod 33 corresponds to the avoidance hole 43, the restriction on the elastic block 3 can be released, enabling the elastic block 3 to be inserted into the avoidance hole 43, causing the elastic block 3 to expand and contract, that is, enabling the tool 2 to be engaged in the tool clamping groove 101. A third elastic member 44 is sleeved at the lower end of the movable column 4, and the lower end of the third elastic member 44 abuts against the tool change handle 1. A pressing column 45 is fixedly arranged above the movable column 4. When the tool change main shaft moves up and down, the pressing column 45 can be squeezed, thereby unlocking the movable column 4.

[0071] When the present invention performs tool change, the drive shaft of the tool change handle 1 is controlled to be arranged at the middle position of the tool change handle 1. During tool change, the drive shaft drives the tool change handle 1 to move upward, and then the pressing column 45 is squeezed by the drive shaft housing, and then the pressing column 45 moves downward. During the downward movement, the pressing column 45 moves downward, and then drives the movable column 4 to move downward. Then, during the downward movement, the avoidance hole 43 can be made to correspond to the position of the drive rod 33. Then the drive shaft rotates, driving the tool change handle 1 to rotate and making the tool clamping groove 101 engage with the tool 2. At this time, the snap ring 11 will be clamped in the clamping groove 21 on the tool 2. When used for a long time, if there is a deviation in the position between the snap ring 11 and the clamping groove 21, the snap ring 11 can adaptively slide under the extrusion of the mouth of the clamping groove 21 of the tool 2 to be clamped into the clamping groove 21, so that the snap ring 11 can be engaged with the clamping groove 21 in a fitting manner. During the above clamping process of the snap ring 11, the tool 2 will gradually squeeze the elastic block 3, and then the elastic slider will retract inward. When retracting inward, it will also drive the abutting block 312 to retract inward synchronously. Then, after the tool 2 is completely engaged in the tool clamping groove 101, the elastic block 3 abuts against the clamping groove 21 on the tool 2 under the elastic force of the second elastic member 32, and at this time the abutting block 312 also abuts against the clamping groove 21. At this time, the abutting block 312 abuts against the clamping groove 21 under the elastic force of the first elastic member 311. And at this time, since the second fixing column 332 provided on the drive rod 33 is sleeved in the first long groove 3101 opened on the locking block 31, that is, at this time, the abutting block 312 drives the locking block 31 to move in the direction of the second fixing column 332 under the extrusion of the clamping groove 21 of the tool 2. Then the drive shaft drives the tool change handle 1 to move downward, so that the pressing column 45 on the drive handle is separated from the housing of the drive shaft. Then, under the elastic force of the third elastic member 44, the movable column 4 can move upward, and then the avoidance hole 43 does not correspond to the drive rod 33. One end of the drive rod 33 passes through the partition surface 41 and then through the inclined extrusion surface 42. Then, through the extrusion of the inclined extrusion surface 42, the drive rod 33 can be made to move in the direction of the elastic block 3. Then, during the movement, due to the action of the second fixing column 332 and the first fixing column 331, the drive rod 33 slides obliquely in the direction of the locking block 31. The first fixing column 331 is fixedly arranged on the drive rod 33, and the first fixing column 331 is slidably arranged in the second long groove 103, that is, the drive rod 33 moves obliquely along the first long groove 3101, and then the second fixing column 332 abuts against the uppermost part of the first long groove 3101. And under the extrusion of the elastic force of the third elastic member 44, the second fixing column 332 is more tightly abutted against the locking block 31, that is, the third elastic member 44 and the first elastic member 311 can simultaneously squeeze the locking block 31, further improving the locking force. And through the above structure, it can be made that after the abutting block 312 is worn after long-term use,Through the arrangement of the third elastic member 44 and the first elastic member 311, the pressing block 312 can continuously press the cutting tool 2. And through the arrangement of the inclined pressing surface 42, the elastic force between the driving rod 33 and the locking block 31 can cooperate with each other, and finally the pressing block 312 presses the cutting tool 2.

[0072] The present invention further provides a numerical control machine tool. The above-mentioned automatic tool changing mechanism further includes a shaft box 5 and a fixing plate 52. A sealing plate 53 is arranged in the shaft box. And there are a sealing plate 53 and a mounting plate 54. The mounting plate 54 is mounted on the fixing plate 52 through a mounting component. The mounting component is used to lock the sealing plate 53 on the fixing plate 52. When the mounting plate 54 is mounted on the sealing plate 53, the sealing plate 53 is mounted and locked by driving the mounting component. Through the arranged sealing plate 53 and the mounting component, and then through the arranged mounting component, the sealing plate 53 can be locked on the fixing plate 52. Moreover, when the mounting plate 54 is mounted on the sealing plate 53, the sealing plate 53 is mounted and locked by driving the mounting component. That is, installation can be carried out without screw-type installation, which is not only convenient for subsequent disassembly and maintenance, but also greatly improves the installation efficiency of the dynamic sealing plate 53.

[0073] In a further embodiment provided by the present invention, a plurality of clamping columns 541 are fixedly arranged on the mounting plate 54. And a clamping column 5411 is fixedly mounted on each clamping column 541. When the clamping column 5411 is inserted into the sealing plate 53, the mounting component is driven to lock on the fixing plate 52.

[0074] In a further embodiment provided by the present invention, the sealing plate 53 is provided with a slot 5301 adapted to the clamping column 5411 and a communicating mounting groove 5302. The clamping column 5411 is inserted and rotated along the slot 5301 to drive the movement of the mounting component.

[0075] In a further embodiment provided by the present invention, the mounting component includes a driving column 531 slidably arranged in the radial direction and a locking block 55 slidably arranged transversely. A first friction plate 552 is arranged on one side surface of the locking block 55. And a second friction plate 5502 is arranged on the inner wall of the fixing plate 52. When the second friction plate 5502 contacts the first friction plate 552, the sealing plate 53 is locked to the fixing plate 52.

[0076] In an embodiment further provided by the present invention, a limiting long groove 5501 is formed at one end of the locking block 55, and a fixed shaft 532 is fixedly arranged on the driving column 531. The fixed shaft 532 is inserted into the limiting long groove 5501. After the driving column 531 moves downward, the fixed shaft 532 is extruded through the limiting long groove 5501, so that the first friction plate 552 on the locking block 55 abuts against the second friction plate 5502. A spring is arranged below the driving column 531. Under the elastic force, the driving column 531 moves upward. And when the clamping column 5411 is not inserted into the installation groove 5302, under the elastic force, the first friction plate 552 on the locking block 55 can be made not to contact the second friction plate 5502. In an embodiment further provided by the present invention 6. An electric spindle dynamic sealing mechanism and a numerical control machine tool according to claim 5, characterized in that a sealing gasket 521 is sleeved on the sealing disc 53. And in the process of the installation component locking the sealing disc 53 to the fixed disc 52, the sealing gasket 521 is driven to abut against the inner wall of the fixed disc 52.

[0077] In an embodiment further provided by the present invention, an inclined surface is formed below the locking block 55, and a fixed abutting rod 551 is fixedly arranged on the inclined surface. The fixed abutting rod 551 abuts against the sealing gasket 521.

[0078] In an embodiment further provided by the present invention, the inclined surface on the locking block 55 slides obliquely along the sealing disc 53. When the locking block 55 slides obliquely, the first friction plate 552 abuts against the second friction plate 5502. Specifically, an inclined surface similar to that of the locking block 55 is arranged below the sealing gasket 521. That is, when the sealing gasket 521 is extruded by the fixed abutting rod 551, the sealing gasket 521 can protrude to the sealing disc 53 and tightly abut against the inner wall of the fixed disc 52.

[0079] In an embodiment further provided by the present invention, an extrusion inclined surface 5311 and a bearing surface 5312 are formed at the top of the driving column 531. When the clamping column 541 passes through the extrusion inclined surface 5311, the driving column 531 is extruded to move in the direction of the fixed shaft 532.

[0080] A sealing bearing 6 is sleeved inside the seal, and the sealing bearing 6 is sleeved on the outer side of the main shaft 56.

[0081] When the present invention is in use and during installation, first, the sealed bearing 6 is installed on the main shaft 56. Then, the sealed disc 53 is inserted into the fixed disc 52. Next, the mounting disc 54 is installed on the sealed disc 53. During the installation process, first, the clamping column 5411 is inserted into the slot 5301, and then rotated, so that the clamping column 5411 slides along the direction of the installation groove 5302. When sliding, the clamping column 5411 gradually presses the pressing inclined surface 5311. That is, under the extrusion of the clamping column 5411, the driving column 531 gradually moves downward. Then, the driving column 531 drives the fixed shaft 532 to move downward, and then makes the locking block 55 move towards the direction of the fixed abutting rod 551. That is, it can synchronously push the locking block 55 and the sealing gasket 521 to move towards the fixed disc 52. Specifically, a spring is arranged below the driving column 531 to make the driving column 531 move upward under the elastic force. And when the clamping column 5411 is not inserted into the installation groove 5302, the first friction plate 552 on the locking block 55 can be made not to contact the second friction plate 5502 under the elastic force, that is, the sealed disc 53 can be disassembled.

[0082] Only some exemplary embodiments of the present invention have been described by way of illustration above. Undoubtedly, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the protection scope of the claims of the present invention.

Claims

1. Automatic tool changing mechanism, characterized in that: It includes a tool changing handle (1), and a tool clamping groove (101) is formed at each end of the tool changing handle (1); the tool clamping groove (101) is used for clamping a tool (2); a clamping ring (11) is slidably arranged in the tool clamping groove (101) along the thickness direction, and the clamping ring (11) is used for being clamped to a clamping groove (21) on the tool (2) to fix the tool (2); When changing the tool, when the clamping ring (11) is squeezed by the mouth of the clamping groove (21) of the tool (2), it can slide adaptively so as to be clamped into the clamping groove (21); It further includes a fixing component arranged in the tool changing handle (1). When the clamping ring (11) is clamped in the clamping groove (21), the fixing component is squeezed to fix the clamping ring (11); A plurality of fixing blocks (112) are arranged on the clamping ring (11), and each fixing block (112) is slidably arranged in a sliding groove (102) formed on the tool changing handle (1); It further includes an elastic member arranged in the sliding groove (102). Under its elastic force, the clamping ring (11) can be in the middle position of the tool clamping groove (101); The elastic member includes a fifth elastic member (1121). The fifth elastic member (1121) is arranged in the sliding groove (102), and one end of the fifth elastic member (1121) abuts against the sliding groove (102) and the other end is fixedly connected to the fixing block (112); The fixing component includes a sliding lock block (111) slidably arranged on the clamping ring (11). One end of the sliding lock block (111) is provided with a first locking tooth (1112), and a locking post (12) is fixedly arranged in the tool changing handle (1). A second locking tooth (121) is arranged on one side of the locking post (12). When the clamping ring (11) is clamped into the clamping groove (21), by squeezing the sliding lock block (111), the first locking tooth (1112) is engaged with the second locking tooth (121) to fix the clamping ring (11); It further includes a locking member arranged at the opening position of the tool clamping groove (101) of the tool changing handle (1). The locking member is used for locking the tool in the tool clamping groove (101).

2. The automatic tool changing mechanism according to claim 1, wherein The locking member includes an elastic block (3) slidably arranged along the long side direction of the tool changing handle (1). One end of the elastic block (3) is fixedly provided with a second elastic member (32), and the other end of the second elastic member (32) abuts against the inside of the tool changing handle (1).

3. The automatic tool changing mechanism according to claim 2, wherein, A tightening component is arranged in the elastic block (3), and the tightening force of the tightening component acts on the clamping groove (21) of the tool (2); the tightening component includes a locking block (31) slidably arranged on the elastic block (3). One end of the locking block (31) is provided with a first elastic member (311). One end of the first elastic member (311) abuts against the elastic block (3), and the other end abuts against the locking block (31). Under the elastic force of the first elastic member (311), a tightening block (312) protrudes from the elastic block (3).

4. The automatic tool changing mechanism according to claim 3, characterized in that, A drive rod (33) is slidably arranged in the elastic block (3), and a second fixing column (332) is fixedly arranged at one end of the drive rod (33), and the second fixing column (332) is inserted into a first long groove (3101) formed in the locking block (31).

5. The automatic tool changing mechanism according to claim 4, characterized in that, It further includes a triggering mechanism, and the triggering mechanism is in transmission connection with the elastic block (3) through the drive rod (33); The triggering mechanism respectively has a locking position, an unlocking position and a pressing position in the vertical direction; In the locking position, the triggering mechanism restricts the expansion and contraction of the elastic block (3) through the drive rod (33); In the unlocking position, the triggering mechanism releases the restriction so that the elastic block (3) can expand and contract; In the pressing position, the triggering mechanism presses against the locking block (31) through the drive rod (33).

6. A numerical control machine tool, comprising the automatic tool changing mechanism according to any one of claims 1-5, characterized in that, It further includes an axle box (5) and a fixing disc (52), and a sealing disc (53) is arranged in the axle box, and the sealing disc (53) and a mounting disc (54), and the mounting disc (54) mounts the sealing disc (53) to the fixing disc (52) through a mounting component.

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