Machining center tool holder kit capable of adjusting the rotation angle of the clamping tool bar

Abstract

The present invention discloses a machining center tool holder kit capable of adjusting the rotation angle of a clamping tool bar, which relates to the technical field of numerical control machine tools. The kit includes a housing, a tool holder nut tightening and loosening assembly, and a tool bar rotation angle control assembly. The tool holder nut tightening and loosening assembly and the tool bar rotation angle control assembly are arranged inside the housing. Through holes are provided in the middle of the housing, the tool holder nut tightening and loosening assembly, and the tool bar rotation angle control assembly. The connecting part of the tool holder and the tool bar is arranged in the through hole, and the tool bar is fixed by a nut. The device of the present invention can conveniently and quickly replace the tool while locking the machine tool spindle, and can also finely adjust the rotation angle of the tool.

Description

Technical Field

[0001] The present invention relates to the technical field of numerical control machine tools, and particularly to a machining center tool holder kit capable of adjusting the rotation angle of a clamped tool shank. Background Art

[0002] The numerical control machining center is developed from the numerical control milling machine, integrating various functions such as milling, boring, drilling, tapping, and threading. By installing different-purpose tools in the tool magazine, various machining functions can be achieved. Its main cutting motion is generally the rotational motion of the spindle, and the tool feed is completed by the movement of the machining platform. In some special machining tasks or machining tests, it is necessary to complete tasks with special feed methods such as broaching, planing, or shaping. Purchasing corresponding broaching machines, planing machines, etc. separately not only reduces the machining efficiency but also greatly increases the production cost. Therefore, the machining center can be used to clamp and customize tools for machining. While locking the spindle, the movement of the machining platform acts as the main motion to complete special machining.

[0003] The spindle drive modes of the machining center include belt drive and gear drive. Neither of the two drive modes can provide a large enough force to directly disassemble, replace, or adjust the tool shank on the spindle. At the same time, such limitations make it impossible to accurately adjust the rotation angle of special tools when the tool holder is clamped on the spindle, thus affecting the machining effect. Summary of the Invention

[0004] To solve at least one of the above problems, the present invention proposes a machining center tool holder kit capable of adjusting the rotation angle of a clamped tool shank.

[0005] The technical solution of the present invention is: a machining center tool holder kit capable of adjusting the rotation angle of a clamped tool shank, including a housing, a tool holder nut tightening and loosening assembly, and a tool shank rotation angle control assembly. The tool holder nut tightening and loosening assembly and the tool shank rotation angle control assembly are arranged inside the housing. Through holes are provided in the middle of the housing, the tool holder nut tightening and loosening assembly, and the tool shank rotation angle control assembly. The connecting part of the tool holder and the tool shank is arranged in the through hole, and the tool holder fixes the tool shank through a nut.

[0006] The tool holder nut tightening and loosening assembly includes a first worm gear, a first drive disk, and a first annular gear. A first worm is also provided, which meshes with the first worm gear. A first planetary gear set is arranged inside the first worm gear. The first drive disk is simultaneously connected to the first worm gear and the first sun gear in the first planetary gear set. The first planetary gear in the first planetary gear set meshes with the first annular gear. The first planetary gear is fixed to the housing through a needle bearing. The first annular gear is fixedly connected to a third drive disk. Nut tightening teeth are provided on the through hole of the third drive disk, and the nut tightening teeth match the nut.

[0007] The tool bar rotation angle control assembly includes a second worm gear, a second transmission disk, and a second annular gear. A second worm is also provided and meshes with the second worm gear. A second planetary gear set is disposed inside the second worm gear. The second transmission disk is connected to both the second worm gear and the second sun gear in the second planetary gear set. The second planetary gears of the second planetary gear set mesh with the second annular gear. The second planetary gears are fixed to the housing through needle bearings. The second annular gear is fixedly connected to a fourth transmission disk. The fourth transmission disk is fixedly connected to a tool bar transmission disk. A second fastening ring is provided on the tool bar transmission disk, and the tool bar is fastened through the second fastening ring.

[0008] In an embodiment of the present invention, the first worm and the second worm are disposed on one side of the housing. A first fastening ring is provided on the side of the housing close to the tool holder nut tightening and loosening assembly, and the tool holder is fixed through the first fastening ring.

[0009] In an embodiment of the present invention, auxiliary rotating members are provided on both the first worm and the second worm, and the first worm and the second worm are driven to rotate through the auxiliary rotating members.

[0010] Further, the auxiliary rotating member is one of a rotating handle or an internal hexagonal bolt groove.

[0011] In an embodiment of the present invention, the transmission ratio of the first worm and the first worm gear is 1:30 - 80, and the transmission ratio of the first planetary gear set is 1:1.5 - 3; the transmission ratio of the second worm and the second worm gear is 1:30 - 80, and the transmission ratio of the second planetary gear set is 1:1.5 - 3.

[0012] In an embodiment of the present invention, the first worm gear, the first transmission disk, the first sun gear, the first annular gear, and the third transmission disk are coaxially arranged; the second worm gear, the second transmission disk, the second sun gear, the second annular gear, the fourth transmission disk, and the tool bar transmission disk are coaxially arranged.

[0013] In an embodiment of the present invention, a scale disk is provided on the second worm, and the scale disk is used to detect the rotation angle of the second worm. Beneficial Effects

[0014] 1. The tool holder nut tightening and loosening assembly and the tool bar rotation angle control assembly of the present invention have almost the same structure and the parts are common, which is convenient for processing and procurement, and at the same time, it is convenient for part replacement during subsequent maintenance;

[0015] 2. The tool holder nut gear set directly acts on the tool holder and its nut with torque, and the torque is not transmitted to the main shaft, which can play a role in protecting the accuracy of the main shaft;

[0016] 3. The device has a compact structure and can set a large transmission ratio at the same time. The transmission disc is used to reduce the speed from the outer ring to the inner ring of the planetary gear train, amplifying the torque and adjusting precision.

[0017] 4. Adopting a kit mode, it has strong adaptability. Users do not need to purchase a separate tool holder and can match a variety of tool holders and tool bars.

[0018] The device of the present invention can conveniently and quickly replace the tool while locking the machine tool spindle, and can also finely adjust the rotation angle of the tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is the structural schematic diagram of the use of the device in this embodiment;

[0020] Figure 2 is Figure 1 the split structural schematic diagram of;

[0021] Figure 3 is Figure 2 the exploded structural schematic diagram of the tool holder nut tightening and loosening assembly and the tool bar rotation angle control assembly in;

[0022] Figure 4 is Figure 2 the sectional structural schematic diagram of the tool holder nut tightening and loosening assembly and the tool bar rotation angle control assembly in.

[0023] In the figure, 1 - tool holder, 101 - nut, 2 - tool bar, 3 - housing, 4 - tool holder nut tightening and loosening assembly, 5 - tool bar rotation angle control assembly, 6 - first transmission disc, 7 - first sun gear, 8 - first planetary gear, 9 - first ring gear, 10 - first worm gear, 11 - third transmission disc, 1101 - nut tightening tooth, 12 - first worm, 13 - second worm, 14 - second transmission disc, 15 - second ring gear, 16 - second worm gear, 17 - second planetary gear, 18 - second sun gear, 19 - fourth transmission disc, 20 - tool bar transmission disc, 21 - second fastening ring, 22 - first fastening ring, 23 - auxiliary rotating part. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] Next, the specific embodiments of the present invention will be clearly and completely described in conjunction with the examples and the drawings. Obviously, the described examples are only a part of the embodiments of the present invention, rather than all the embodiments.

[0025] Such as Figures 1-4As shown in the figure, it includes a housing 3, a handle nut tightening and loosening assembly 4, and a tool bar rotation angle control assembly 5. The handle nut tightening and loosening assembly 4 and the tool bar rotation angle control assembly 5 are arranged inside the housing 3. Through holes are provided in the middle of the housing 3, the handle nut tightening and loosening assembly 4, and the tool bar rotation angle control assembly 5. The connecting part of the handle 1 and the tool bar 2 is arranged in the through hole, and the tool bar 2 is fixed by the nut 101 to the handle 1.

[0026] The handle nut tightening and loosening assembly 4 includes a first worm gear 10, a first drive disk 6, and a first ring gear 9. A first worm 12 meshing with the first worm gear 10 is also provided. A first planetary gear set is arranged inside the first worm gear 10. The first drive disk 6 is connected to both the first worm gear 10 and the first sun gear 7 in the first planetary gear set. The first planetary gear 8 of the first planetary gear set meshes with the first ring gear 9. The first planetary gear 8 is fixed to the housing 3 through a needle roller bearing. The first ring gear 9 is fixedly connected to a third drive disk 11. Nut tightening teeth 1101 are provided on the through hole of the third drive disk 11, and the nut tightening teeth 1101 match the nut 101.

[0027] The tool bar rotation angle control assembly 5 includes a second worm gear 16, a second drive disk 14, and a second ring gear 15. A second worm 13 meshing with the second worm gear 16 is also provided. A second planetary gear set is arranged inside the second worm gear 16. The second drive disk 14 is connected to both the second worm gear 16 and the second sun gear 18 in the second planetary gear set. The second planetary gear 17 of the second planetary gear set meshes with the second ring gear 15. The second planetary gear 17 is fixed to the housing 3 through a needle roller bearing. The second ring gear 15 is fixedly connected to a fourth drive disk 19. The fourth drive disk 19 is fixedly connected to a tool bar drive disk 20. A second fastening ring 21 is provided on the tool bar drive disk 20, and the tool bar 2 is fastened through the second fastening ring 21.

[0028] Specifically, in this embodiment, the housing 3, the handle nut tightening and loosening assembly 4, and the tool bar rotation angle control assembly 5 are three main components to achieve the purpose of this embodiment. Among them, the main function of the housing 3 is to arrange the handle nut tightening and loosening assembly 4 and the tool bar rotation angle control assembly 5 in a relatively enclosed space. At the same time, the housing 3 can also provide corresponding bearing points.

[0029] For ease of practical use, the first worm 12 and the second worm 13 are respectively arranged on one side of the housing 3. A first fastening ring 22 is provided on the side of the housing 3 close to the tool holder nut tightening and loosening assembly 4, and the tool holder 1 is fixed by the first fastening ring 22. For the first fastening ring 22, a conventional fastening ring in the prior art can be used, such as a fastening ring fastened by bolts or a fastening ring fastened by a buckle, which is a conventional fastening ring in the art. At the same time, since the first fastening ring 22 needs to transmit torque, it is required that the first fastening ring 22 is rigid and will not deform during the torque transmission process.

[0030] For the tool holder nut tightening and loosening assembly 4 and the tool rod rotation angle control assembly 5, their structures are basically the same. The difference is that a second fastening ring 21 fixed to the tool rod 2 is provided at one end of the tool rod rotation angle control assembly 5. And the connection relationship between the tool holder nut tightening and loosening assembly 4 and the tool rod rotation angle control assembly 5 is not limited, but a part of both the tool holder nut tightening and loosening assembly 4 and the tool rod rotation angle control assembly 5 are fixedly connected to the housing 3.

[0031] For the tool holder nut tightening and loosening assembly 4, it is used to control the tightening and loosening of the nut 101 on the tool holder 1 so as to achieve the purpose of disassembling the tool rod 2 from the tool holder 1. Specifically, the first worm gear 10 and the first worm 12 are meshed. Through the first worm 12, the first worm gear 10 can be rotated. The first transmission disk 6 is simultaneously connected to the first worm gear 10 and the first sun gear 7. When the first worm gear 10 rotates, the first transmission disk 6 rotates and simultaneously drives the first sun gear 7 to rotate. Since the first sun gear 7 and the first planetary gear 8 belong to the first planetary gear set, when the first sun gear 7 rotates, it will drive the first planetary gear 8 to rotate. The first planetary gear 8 is fixed to the housing 3 through a needle bearing. Since the first planetary gear 8 is meshed with the first annular gear 9, the rotation of the first planetary gear 8 will drive the first annular gear 9 to rotate. Since the first annular gear 9 is connected to the third transmission disk 11, the rotation of the first annular gear 9 will drive the third transmission disk 11 to rotate. When the third transmission disk 11 rotates, since the third transmission disk 11 is provided with nut tightening teeth 1101 matching the nut 101, the third transmission disk 11 will drive the nut 101 to rotate, thereby tightening or disassembling the nut 101.

[0032] In this embodiment, the first worm 12 and the first worm gear 10 are used to provide the initial torque. As is known to those skilled in the art, the worm and worm gear can amplify the torque, so that the nut 101 that was originally not easily disassembled can be easily disassembled, thus enabling operations such as tool change. Particularly, when the transmission ratio of the first worm 12 and the first worm gear 10 is 1:30 - 80 and the transmission ratio of the first planetary gear set is 1:1.5 - 3, the tool holder nut tightening and loosening assembly 4 can relatively easily disassemble the nut 101.

[0033] For the tool bar rotation angle control component 5, it is used to adjust the angle of the tool bar 2 to increase the transmission accuracy of the tool bar 2. Specifically, the second worm gear 16 meshes with the second worm 13. Through the second worm 13, the second worm gear 16 can be rotated. The second transmission disk 14 is connected to both the second worm gear 16 and the second sun gear 18 at the same time. When the second worm gear 16 rotates, the second transmission disk 14 rotates and drives the second sun gear 18 to rotate at the same time. Since the second sun gear 18 and the second planet gear 17 belong to the second planetary gear set, when the second sun gear 18 rotates, it will drive the second planet gear 17 to rotate. The second planet gear 17 is fixed to the housing 3 through a needle bearing. Since the second planet gear 17 meshes with the second ring gear 15, the rotation of the second planet gear 17 will drive the second ring gear 15 to rotate. Since the second ring gear 15 is connected to the fourth transmission disk 19, the rotation of the second ring gear 15 will drive the fourth transmission disk 19 to rotate. When the fourth transmission disk 19 rotates, since the fourth transmission disk 19 is connected to the tool bar transmission disk 20, the fourth transmission disk 19 will drive the tool bar transmission disk 20 to rotate. Since the second fastening ring 21 is provided on the tool bar transmission disk 20, when the tool bar transmission disk 20 rotates, it can drive the second fastening ring 21 to rotate, and then finely adjust the angle of the tool bar 2 connected to the second fastening ring 21. Since the second fastening ring 21 needs to transmit torque, it is required that the second fastening ring 21 be rigid and will not deform during the process of transmitting torque.

[0034] Similarly, in this embodiment, the second worm 13 and the second worm gear 16 are used to provide the initial torque. As is known to those skilled in the art, the worm and worm gear can amplify the torque and reduce the stroke at the same time, so that the tool bar angle can be easily adjusted and the adjustment accuracy is higher. In particular, when the transmission ratio of the second worm 13 and the second worm gear 16 is 1:30 - 80 and the transmission ratio of the second planetary gear set is 1:1.5 - 3, the tool bar rotation angle control component 5 can more accurately adjust the rotation angle of the tool bar 2.

[0035] During the implementation process, a corresponding scale disk can also be set on the second worm 13. Through this scale disk, the rotation angle of the second worm 13 can be measured. Through the total transmission ratio of the second worm 13 and the tool bar transmission disk 20, the ratio of the rotation angle of the second worm 13 to the rotation angle of the tool bar 2 can be obtained, so that the rotation angle of the tool bar 2 can be controlled more conveniently; for example, when the total transmission ratio of the second worm 13 and the tool bar transmission disk 20 is 1:100, the ratio of the rotation angle of the second worm 13 to the rotation angle of the tool bar 2 is 100:1, so that accurate control of the rotation angle can be achieved.

[0036] Specifically, for more convenient and faster use in actual operation and to avoid errors, we specify that the first worm gear 10, the first drive disk 6, the first sun gear 7, the first ring gear 9, and the third drive disk 11 are coaxially arranged; the second worm gear 16, the second drive disk 14, the second sun gear 18, the second ring gear 15, the fourth drive disk 19, and the tool bar drive disk 20 are coaxially arranged.

[0037] To facilitate applying torque to the first worm 12 and the second worm 13, an auxiliary rotating member 23 is provided on each of the first worm 12 and the second worm 13. Through this auxiliary rotating member 23, it is possible to drive the first worm 12 and the second worm 13 to rotate more conveniently, thereby applying torque to the first worm gear 10 and the second worm gear 16. Specifically, for the auxiliary rotating member 23, it can be set as an electric auxiliary rotating member 23, such as a motor driving the first worm 12 and the second worm 13 to rotate, or a manual auxiliary rotating member 23 can be used, such as a conventional rotating handle or an internal hexagonal bolt hole. By turning the rotating handle or using an internal hexagonal wrench, a rotating torque can be applied. Considering the convenience of use, a manual auxiliary rotating member 23, such as an internal hexagonal bolt hole or a rotating handle, is often used. In this embodiment, an internal hexagonal bolt hole is selected.

[0038] During use, the device of this embodiment is installed at the connection part between the tool holder 1 and the tool bar 2, and the tool holder nut tightening and loosening assembly 4 is close to the tool holder 1, and the tool bar rotation angle control assembly 5 is close to the tool bar 2. The nut 101 on the tool holder 1 cooperates with the nut tightening teeth 1101 provided on the through hole of the third drive disk 11.

[0039] When the tool needs to be disassembled, turn the first worm 12 with an internal hexagonal wrench, and amplify the torque through the first worm gear 10, the first planetary gear set, and the first ring gear 9. Since the first fastening ring 22 on the housing 3 is fixed to the tool holder 1, and the first planetary gear 8 in the first planetary gear set is fixed to the housing 3, the amplified torque can unscrew the nut 101 on the tool holder 1, so that the tool can be replaced; when installing the tool, turn the first worm 12 in the opposite direction.

[0040] When the direction of the tool needs to be finely adjusted, turn the second worm 13 with an internal hexagonal wrench, and amplify the torque through the second worm gear 16, the second planetary gear set, and the second ring gear 15. Since the second fastening ring 21 on the tool bar drive disk 20 is fixed to the tool bar 2, and the second planetary gear 17 in the second planetary gear set is fixed to the housing 3, the reduced rotation stroke can accurately control the rotation angle of the tool bar 2.

[0041] In the actual use process, we can cope with different sizes of tool shanks 2, tool holders 1 and nuts 101 by replacing the tool shank drive disks 20, the first fastening rings 22 and the third drive disks 11 with different sizes.

[0042] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments by using the disclosed technical content within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A machining center tool holder kit capable of adjusting the rotation angle of a clamping tool bar, characterized in that, It includes a housing, a tool holder nut tightening and loosening assembly, and a tool bar rotation angle control assembly. The tool holder nut tightening and loosening assembly and the tool bar rotation angle control assembly are arranged inside the housing. Through holes are provided in the middle of the housing, the tool holder nut tightening and loosening assembly, and the tool bar rotation angle control assembly. The connecting part of the tool holder and the tool bar is arranged in the through hole, and the tool bar is fixed by the nut through the tool holder. The tool holder nut tightening and loosening assembly includes a first worm gear, a first transmission disk, and a first annular gear. A first worm meshing with the first worm gear is also provided. A first planetary gear set is arranged inside the first worm gear. The first transmission disk is connected to both the first worm gear and the first sun gear in the first planetary gear set at the same time. The first planetary gear in the first planetary gear set meshes with the first annular gear. The first planetary gear is fixed to the housing through a needle bearing. The first annular gear is fixedly connected with a third transmission disk. Nut tightening teeth are provided on the through hole of the third transmission disk, and the nut tightening teeth match the nut. The tool bar rotation angle control assembly includes a second worm gear, a second transmission disk, and a second annular gear. A second worm meshing with the second worm gear is also provided. A second planetary gear set is arranged inside the second worm gear. The second transmission disk is connected to both the second worm gear and the second sun gear in the second planetary gear set at the same time. The second planetary gear in the second planetary gear set meshes with the second annular gear. The second planetary gear is fixed to the housing through a needle bearing. The second annular gear is fixedly connected with a fourth transmission disk. The fourth transmission disk is fixedly connected with a tool bar transmission disk. A second fastening ring is provided on the tool bar transmission disk, and the tool bar is fastened through the second fastening ring.

2. The kit according to claim 1, characterized in that The first worm and the second worm are arranged on one side of the housing. A first fastening ring is provided on one side of the housing close to the tool holder nut tightening and loosening assembly, and the tool holder is fixed through the first fastening ring.

3. The kit according to claim 1, wherein Auxiliary rotating parts are provided on both the first worm and the second worm, and the first worm and the second worm are driven to rotate through the auxiliary rotating parts.

4. The kit according to claim 3, characterized in that, The auxiliary rotating part is one of a rotating handle or an internal hexagonal bolt groove.

5. The kit according to claim 1, characterized in that, The transmission ratio of the first worm and the first worm gear is 1:30 - 80, and the transmission ratio of the first planetary gear set is 1:1.5 - 3; the transmission ratio of the second worm and the second worm gear is 1:30 - 80, and the transmission ratio of the second planetary gear set is 1:1.5 - 3.

6. The kit according to claim 1, wherein The first worm gear, the first transmission disk, the first sun gear, the first annular gear, and the third transmission disk are coaxially arranged; the second worm gear, the second transmission disk, the second sun gear, the second annular gear, the fourth transmission disk, and the tool bar transmission disk are coaxially arranged.

7. The kit according to claim 1, wherein A scale disk is provided on the second worm, and the scale disk is used to detect the rotation angle of the second worm.

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