A hollow shaft in a numerical control machine tool

Abstract

The utility model discloses a hollow shaft in numerical control machine tool, including hollow shaft body, the inside rotation of hollow shaft body is connected with rhombus cover, the inside slide of rhombus cover is connected with rhombic post, one end of rhombic post is fixedly connected with numerical control machine tool cutter, the outer wall fixed cover of numerical control machine tool cutter is equipped with concave clasp, the outer wall of hollow shaft body is equipped with two T grooves, the inner wall of two T grooves all slide all and are connected with T block, the outer wall of two T blocks all are equipped with rectangular positioning hole. The utility model discloses through setting up T groove, T block, rectangular positioning hole, arc clamping block, T type recess, work piece, rectangular positioning block, spring, rectangular rod, arc piece and concave clasp, pushes arc clamping block and can complete installation positioning, only needs to remove arc piece when disassembling can remove positioning, and the operation process is greatly simplified, and effectively promotes the efficiency of tool changing, and reduces manpower consumption.

Description

Technical Field

[0001] This utility model relates to the field of hollow shaft technology, and in particular to a hollow shaft for CNC machine tools. Background Technology

[0002] In the structural system of CNC machine tools, hollow shafts are a type of key shaft component with a special structure. Their core feature is that the center of the spindle or feed axis is designed as a through-hole shape, rather than a traditional solid structure. Since the spindle is the core actuator for CNC machine tools to perform cutting, drilling, and other machining operations, the hollow channel in the center becomes an important carrier for mounting cutting tools. For example, in machining centers, commonly used tool holders (such as BT tool holders) can be installed through the hollow part of the spindle.

[0003] In existing technologies, mounting tool holders on hollow shafts typically relies on multiple independent bolts or complex sleeve mechanisms for radial locking. Operators must use specialized tools and spend a lot of time and effort on alignment and tightening, making the installation process cumbersome and greatly reducing tool changing efficiency. Therefore, we propose a hollow shaft for CNC machine tools to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a hollow shaft for CNC machine tools.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A hollow shaft for a CNC machine tool includes a hollow shaft body, a rhomboid sleeve rotatably connected inside the hollow shaft body, a rhomboid column slidably connected inside the rhomboid sleeve, a CNC machine tool tool fixedly connected to one end of the rhomboid column, a concave retaining ring fixedly sleeved on the outer wall of the CNC machine tool tool, two T-slots formed on the outer wall of the hollow shaft body, T-blocks slidably connected to the inner walls of the two T-slots, rectangular positioning holes formed on the outer walls of the two T-blocks, and arc-shaped clamping blocks fixedly connected to one end of the two T-blocks, and a clamping assembly provided on the outer wall of the hollow shaft body.

[0007] Preferably, the clamping assembly includes two I-shaped blocks. The outer wall of the hollow shaft body has two T-shaped grooves. The inner walls of the two T-shaped grooves are slidably connected to the outer walls of the two I-shaped blocks. A rectangular positioning block is fixedly connected to one end of each of the two I-shaped blocks. A spring is fixedly connected to the other end of each of the two I-shaped blocks. One end of each spring is fixedly connected to the inner wall of the two T-shaped grooves. A rectangular rod is fixedly connected to the outer wall of each of the two I-shaped blocks. An arc-shaped piece is fixedly connected to one end of each of the two rectangular rods. By setting the clamping assembly, the concave retaining ring and the CNC machine tool tool are fixedly positioned without affecting their rotation.

[0008] Preferably, the inner walls of the two T-slots are provided with rectangular holes, and the inner walls of the two rectangular holes are slidably connected to the outer walls of the two rectangular positioning blocks, so that the T-blocks are fixed in position by setting the rectangular positioning blocks.

[0009] Preferably, the outer walls of the two rectangular rods are slidably connected to the inner walls of the two T-shaped grooves, and the rectangular rods drive the I-shaped block to move.

[0010] Preferably, the outer walls of both arc-shaped pieces are slidably connected to the outer wall of the hollow shaft body.

[0011] Preferably, the two arc-shaped pieces are arranged symmetrically.

[0012] Compared with the prior art, the advantages of this utility model are:

[0013] This solution uses a combination of T-slots, T-blocks, rectangular positioning holes, arc-shaped clamping blocks, T-grooves, I-blocks, rectangular positioning blocks, springs, rectangular rods, arc-shaped pieces, and concave retaining rings. Installation and positioning can be completed by pushing the arc-shaped clamping blocks, and disassembly can be completed by simply moving the arc-shaped pieces. This greatly simplifies the operation process, effectively improves tool changing efficiency, and reduces manpower consumption. Attached Figure Description

[0014] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a three-dimensional structural diagram of a hollow shaft in a CNC machine tool according to the present invention.

[0016] Figure 2 This is a schematic cross-sectional view of a hollow shaft in a CNC machine tool according to the present invention.

[0017] Figure 3 This utility model proposes a hollow shaft for a CNC machine tool. Figure 2 A magnified structural diagram of part A in the diagram.

[0018] In the diagram: 1. Hollow shaft body; 2. Rhomboid sleeve; 3. Rhomboid column; 4. CNC machine tool tool; 5. T-slot; 6. T-block; 7. Rectangular positioning hole; 8. Arc-shaped clamping block; 9. T-groove; 10. I-shaped block; 11. Rectangular positioning block; 12. Spring; 13. Rectangular rod; 14. Arc-shaped piece; 15. Concave retaining ring. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0020] Depend on Figures 1-3 As shown, a hollow shaft for a CNC machine tool is disclosed, comprising a hollow shaft body 1, a rhomboid sleeve 2 rotatably connected inside the hollow shaft body 1, the rhomboid sleeve 2 rotating via an existing drive device, and a rhomboid column 3 slidably connected inside the rhomboid sleeve 2, the rhomboid sleeve 2 ensuring that the rhomboid column 3 rotates synchronously with it, thereby ensuring the stable rotational cutting motion of the CNC machine tool tool 4.

[0021] One end of the rhomboid column 3 is fixedly connected to a CNC machine tool cutter 4. A concave retaining ring 15 is fixedly sleeved on the outer wall of the CNC machine tool cutter 4. The concave retaining ring 15 can limit the CNC machine tool cutter 4, prevent the CNC machine tool cutter 4 from moving out of the preset position due to excessive axial movement during operation, and can also assist in positioning the CNC machine tool cutter 4 during assembly or adjustment.

[0022] Two T-slots 5 are provided on the outer wall of the hollow shaft body 1. T-blocks 6 are slidably connected to the inner walls of the two T-slots 5. The T-shaped structure of the T-slots 5 can guide the sliding direction of the T-blocks 6. Rectangular positioning holes 7 are provided on the outer walls of the two T-blocks 6. Arc-shaped clamping blocks 8 are fixedly connected to one end of the two T-blocks 6.

[0023] The arc-shaped clamping block 8 is driven to move by the T-shaped block 6. Its arc-shaped structure has a higher degree of fit with the outer wall of the part to be clamped (such as tool-related components or other mating parts). The contact surface is coated with lubricating oil, and the outer wall of the hollow shaft body is equipped with a cooling pipe to cool its contact surface.

[0024] The outer wall of the hollow shaft body 1 is provided with a clamping assembly, which includes two I-shaped blocks 10. The outer wall of the hollow shaft body 1 has two T-shaped grooves 9. The inner walls of the two T-shaped grooves 9 are slidably connected to the outer walls of the two I-shaped blocks 10 respectively. A rectangular positioning block 11 is fixedly connected to one end of each of the two I-shaped blocks 10. The rectangular positioning hole 7 cooperates with the rectangular positioning block 11. When the rectangular positioning block 11 is inserted into the rectangular positioning hole 7, it can restrict the sliding of the T-shaped block 6 in the T-shaped groove 5.

[0025] The inner walls of the two T-slots 5 are provided with rectangular holes. The inner walls of the two rectangular holes are slidably connected to the outer walls of the two rectangular positioning blocks 11. The other ends of the two I-shaped blocks 10 are fixedly connected with springs 12. One end of the two springs 12 is fixedly connected to the inner walls of the two T-shaped grooves 9. The outer walls of the two I-shaped blocks 10 are fixedly connected with rectangular rods 13. The outer walls of the two rectangular rods 13 are slidably connected to the inner walls of the two T-shaped grooves 9. One end of the two rectangular rods 13 is fixedly connected with arc-shaped pieces 14. The outer walls of the two arc-shaped pieces 14 are slidably connected to the outer walls of the hollow shaft body 1. The two arc-shaped pieces 14 are symmetrically arranged.

[0026] When the I-shaped block 10 moves, the rectangular positioning block 11 can be inserted into or pulled out of the rectangular positioning hole 7 of the T-shaped block 6 to achieve positioning or release of the T-shaped block 6, thereby controlling the clamping and releasing state of the arc-shaped clamping block 8.

[0027] Working principle: In use, the left end of the hollow shaft body 1 is fixed to the CNC machine tool drive equipment. After installing the CNC machine tool tool 4, the rhomboid prism 3 is inserted into the rhomboid sleeve 2, and the concave retaining ring 15 is attached to the outer wall of the hollow shaft body 1. The two arc-shaped clamping blocks 8 are moved to fit against the concave surface of the concave retaining ring 15, thus limiting its movement. The two arc-shaped clamping blocks 8 move through the two T-blocks 6. After the two T-blocks 6 move to a certain position, the two rectangular positioning holes 7 move to the positions of the two rectangular positioning blocks 11. Two rectangular positioning blocks 11 enter the rectangular positioning holes 7 through the elastic force of two springs 12, fixing the positions of the two T-shaped blocks 6, thereby ensuring the position of the concave retaining ring 15 is fixed. When disassembling it, the two arc-shaped pieces 14 are moved, which drives the two rectangular rods 13 to move. The movement of the two rectangular rods 13 drives the two I-shaped blocks 10 to move. The movement of the two I-shaped blocks 10 drives the two rectangular positioning blocks 11 to slide out from the two rectangular positioning holes 7.

[0028] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A hollow shaft for a CNC machine tool, comprising a hollow shaft body (1), characterized in that, The hollow shaft body (1) is rotatably connected to a rhomboid sleeve (2), and the rhomboid sleeve (2) is slidably connected to a rhomboid column (3). One end of the rhomboid column (3) is fixedly connected to a CNC machine tool cutter (4). The outer wall of the CNC machine tool cutter (4) is fixedly fitted with a concave retaining ring (15). The outer wall of the hollow shaft body (1) has two T-slots (5). The inner walls of the two T-slots (5) are slidably connected to T-blocks (6). The outer walls of the two T-blocks (6) are each provided with rectangular positioning holes (7). One end of the two T-blocks (6) is fixedly connected to an arc-shaped clamping block (8). The outer wall of the hollow shaft body (1) is provided with a clamping assembly.

2. A hollow shaft for a CNC machine tool according to claim 1, characterized in that, The clamping assembly includes two I-shaped blocks (10). The outer wall of the hollow shaft body (1) has two T-shaped grooves (9). The inner walls of the two T-shaped grooves (9) are slidably connected to the outer walls of the two I-shaped blocks (10). A rectangular positioning block (11) is fixedly connected to one end of each of the two I-shaped blocks (10). A spring (12) is fixedly connected to the other end of each of the two I-shaped blocks (10). One end of each spring (12) is fixedly connected to the inner wall of the two T-shaped grooves (9). A rectangular rod (13) is fixedly connected to the outer wall of each of the two I-shaped blocks (10). An arc-shaped piece (14) is fixedly connected to one end of each of the two rectangular rods (13).

3. A hollow shaft for a CNC machine tool according to claim 2, characterized in that, The inner walls of the two T-slots (5) are provided with rectangular holes, and the inner walls of the two rectangular holes are slidably connected to the outer walls of the two rectangular positioning blocks (11).

4. A hollow shaft for a CNC machine tool according to claim 2, characterized in that, The outer walls of the two rectangular rods (13) are slidably connected to the inner walls of the two T-shaped grooves (9).

5. A hollow shaft for a CNC machine tool according to claim 2, characterized in that, The outer walls of the two arc-shaped pieces (14) are slidably connected to the outer wall of the hollow shaft body (1).

6. A hollow shaft for a CNC machine tool according to claim 2, characterized in that, The two arc-shaped pieces (14) are arranged symmetrically.

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