Improved three-axis linkage deep hole machining device

Abstract

The utility model discloses an improved three-axis linkage deep hole machining device, which relates to the technical field of deep hole machining and comprises a base, a first guide rail, a first propelling mechanism and a stand column are arranged on the base, a workbench movably mounted on the first guide rail is arranged on the first guide rail, and the first propelling mechanism is in transmission connection with the workbench. The stand column is provided with a second guide rail, a second pushing mechanism and a balance weight mechanism, the second guide rail is provided with a main shaft mechanism, the second pushing mechanism is in transmission connection with the main shaft mechanism, and the balance weight mechanism is fixedly connected with the main shaft mechanism. The movable chuck is movably mounted on the third guide rail; a movable supporting block movably installed on the third guide rail is arranged between the fixed chuck and the movable chuck, a first elastic piece is arranged between the movable supporting block and the fixed chuck, a second elastic piece is arranged between the movable supporting block and the movable chuck, the workpiece can be evenly supported, and the machining precision is improved.

Description

Technical Field

[0001] This utility model relates to the field of deep hole machining technology, and in particular to an improved three-axis linkage deep hole machining device. Background Technology

[0002] Multi-axis linkage refers to the simultaneous machining on multiple coordinate axes (including linear and rotary coordinates) of a single machine tool, which can be coordinated and operated simultaneously under the control of a computer numerical control (CNC) system. Multi-axis linkage machining can improve the machining accuracy, quality, and efficiency of free-form surfaces in space. Modern CNC machining is developing towards high speed, high precision, high intelligence, high flexibility, high automation, and high reliability, and multi-axis CNC machine tools embody this trend.

[0003] Existing technologies typically employ a lifting mechanism composed of a motor and a lead screw. The lifting mechanism drives the spindle mechanism to move up and down. However, in practical applications, it has been found that the heavy weight of the spindle mechanism results in a large load on the lifting mechanism, making it difficult to move accurately and reducing machining accuracy. At the same time, the heavy spindle mechanism puts a strain on the lead screw's lifespan, seriously affecting product lifespan and maintenance costs. Therefore, it is necessary to improve upon these issues.

[0004] In view of this, the applicant applied for a Chinese patent in 2020 with authorization announcement number CN213496599U: "A Three-Axis Linkage Deep Hole Machining Device" (hereinafter referred to as Prior Artwork 1). By setting up a counterweight mechanism, the counterweight mechanism includes a pulley, a steel cable and a counterweight block. The pulley is fixedly installed on the upper end face of the column and is connected to the steel cable for transmission. One end of the steel cable is fixedly connected to the counterweight block and the other end is fixedly connected to the main spindle mechanism. The counterweight balances the torque, reduces the load of the main spindle mechanism on the lead screw, makes the lifting of the main spindle mechanism more precise, and avoids the impact of high load on the life of the lead screw, thus achieving the effect of high machining accuracy and long service life.

[0005] However, in practical applications, when using Prior Artwork 1 for deep hole machining of optical fiber preforms, a workpiece clamping device is typically added to the worktable. Common clamping methods include three-jaw chucks and four-jaw single-action chucks. This device secures the optical fiber preform, ensuring its stability throughout the deep hole machining process. However, current workpiece clamping devices still have some drawbacks. For example, when dealing with slender optical fiber preforms, the common practice is to fix both ends of the workpiece before deep hole machining. During this process, the portion of the workpiece between the clamping devices is not supported, causing slight vibration when the deep hole drill bit is used, affecting machining accuracy. Therefore, based on Prior Artwork 1, the applicant proposes an improved three-axis linkage deep hole machining device.

[0006] Therefore, it is necessary to propose a new technical solution to address the above problems. Utility Model Content

[0007] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the aforementioned problems.

[0008] To achieve the above objectives, this utility model provides the following technical solution: an improved three-axis linkage deep hole machining device, comprising a base, on which a first guide rail, a first propulsion mechanism, and a column are arranged. The first guide rail is fixedly installed on the base, and a worktable is arranged on the first guide rail, the worktable being movably installed on the first guide rail. The first propulsion mechanism is fixedly installed on the base and is drively connected to the worktable. The column is fixedly installed on the base at one end away from the worktable, and a second guide rail, a second propulsion mechanism, and a counterweight mechanism are arranged on the column. The second guide rail is fixedly installed on the side of the column, and a spindle mechanism is arranged on the second guide rail, the spindle mechanism being movably installed on the second guide rail. The second propulsion mechanism is fixedly installed on the column and is drively connected to the spindle mechanism. The counterweight mechanism is fixedly installed on the column and is fixedly connected to the spindle mechanism. The device is characterized in that...

[0009] An assembly table is installed on the workbench. A fixed chuck is provided on the side of the assembly table near the column, and a movable chuck is provided on the side of the assembly table away from the column, facing the fixed chuck. A third guide rail is provided on the assembly table, and the movable chuck is movably installed on the third guide rail.

[0010] A movable support block is provided between the fixed chuck and the movable chuck, and the movable support block is movably mounted on the third guide rail. A first elastic element is provided between the movable support block and the fixed chuck, and a second elastic element is provided between the movable support block and the movable chuck.

[0011] As a further embodiment of this utility model: a first guide rod is provided on one side of the fixed chuck, and the first guide rod passes through the movable support block and the movable chuck in sequence, so that the movable support block and the movable chuck can be movably connected to the first guide rod;

[0012] The first elastic element and the second elastic element are both sleeved on the first guide rod.

[0013] As a further embodiment of this utility model: the movable support block includes a bottom block and a top block. The bottom block is movably mounted on a third guide rail. A groove is opened on the upper surface of the bottom block. A third elastic element is provided in the groove. The third elastic element is connected to the top block.

[0014] As a further embodiment of this utility model: a guide groove is provided on the bottom surface of the slot, and a second guide rod is movably arranged in the guide groove, the second guide rod being fixedly connected to the top block.

[0015] As a further embodiment of this utility model: the top surface of the top block has an arc-shaped structure.

[0016] As a further embodiment of this utility model: the first elastic element, the second elastic element, and the third elastic element are all springs.

[0017] As a further embodiment of this utility model: the counterweight mechanism includes a pulley, a steel cable and a counterweight block. The pulley is fixedly installed on the upper end face of the column and is connected to the steel cable in a transmission manner. One end of the steel cable is fixedly connected to the counterweight block and the other end is fixedly connected to the main shaft mechanism.

[0018] As a further embodiment of this utility model: the spindle mechanism includes a cantilever, a fourth guide rail, a fifth guide rail, a propulsion assembly, a rotation assembly, a guide seat, and a follower post. The cantilever is fixedly connected to the counterweight mechanism and movably connected to the second guide rail. The propulsion assembly, the fourth guide rail, and the fifth guide rail are all fixedly mounted on the cantilever. The rotation assembly is movably mounted on the fourth guide rail and is drively connected to the propulsion assembly. The guide seat is movably mounted on the fourth guide rail at the end away from the rotation assembly. The follower post is movably mounted on the fifth guide rail.

[0019] Compared with the prior art, the beneficial effects of this technical solution are as follows: the sliding adjustment design of the movable chuck on the third guide rail allows for clamping of workpieces of different sizes. Therefore, when processing workpieces of different sizes, operators do not need to spend time and effort changing the fixtures, thereby improving processing efficiency and operational convenience.

[0020] The movable support block supports the middle part of the workpiece, which improves the overall stability of the workpiece during processing and reduces vibration and tremor, especially under high-speed rotation conditions. This not only helps to improve the surface finish of deep holes, but also reduces drill wear and improves processing accuracy. In addition, the movable support block is movable, so that the position of the movable support block can be adjusted to the optimal support position according to the size of the workpiece.

[0021] While the movable chuck clamps the workpiece according to its size, it also compresses the second elastic element. The compressed second elastic element pushes the movable support block towards the fixed chuck, which in turn compresses the first elastic element. The thrust generated by the compressed first elastic element counteracts the thrust of the second elastic element. When the thrusts exerted by the first and second elastic elements on the movable support block tend to balance, the position of the movable support block can be pushed to the middle position between the fixed and movable chucks to achieve the best support effect for the workpiece. No manual intervention is required, which can flexibly adapt to workpieces of different lengths, simplify the adjustment process, and reduce operation time and costs.

[0022] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the assembly table structure of this utility model;

[0026] Figure 3 This is a schematic diagram of the movable support block structure of this utility model;

[0027] Figure 4 This is a schematic cross-sectional view of the movable support block of this utility model;

[0028] Figure 5 This is a schematic diagram of the counterweight mechanism and main shaft mechanism of this utility model;

[0029] The corresponding labels in the attached diagram are explained as follows:

[0030] 1. Base; 2. First guide rail; 3. First propulsion mechanism; 4. Column; 5. Worktable; 6. Second guide rail; 7. Second propulsion mechanism; 8. Counterweight mechanism; 9. Spindle mechanism; 10. Assembly table; 11. Fixed chuck; 12. Movable chuck; 13. Third guide rail; 14. Movable support block; 15. First elastic element; 16. First guide rod; 17. Bottom block; 18. Top block; 19. Groove; 20. Third elastic element; 21. Guide groove; 22. Second guide rod; 23. Pulley; 24. Steel cable; 25. Counterweight block; 26. Cantilever; 27. Fourth guide rail; 28. Fifth guide rail; 29. ​​Propulsion assembly; 30. Rotation assembly; 31. Guide seat; 32. Tool holder; 33. Second elastic element. Detailed Implementation

[0031] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Please see Figure 1-5 An improved three-axis linkage deep hole machining device includes a base 1, on which a first guide rail 2, a first propulsion mechanism 3, and a column 4 are mounted. The first guide rail 2 is fixedly mounted on the base 1, and a worktable 5 is mounted on the first guide rail 2. The worktable 5 is movably mounted on the first guide rail 2. The first propulsion mechanism 3 is fixedly mounted on the base 1 and is drively connected to the worktable 5. The column 4 is fixedly mounted on the base 1 at one end away from the worktable 5, and a second guide rail 6, a second propulsion mechanism 7, and a counterweight mechanism 8 are mounted on the column 4. The second guide rail 6 is fixedly mounted on the side of the column 4, and a spindle mechanism 9 is mounted on the second guide rail 6. The spindle mechanism 9 is movably mounted on the second guide rail 6. The second propulsion mechanism 7 is fixedly mounted on the column 4, and the second... The propulsion mechanism 7 is driven by the spindle mechanism 9. The counterweight mechanism 8 is fixedly mounted on the column 4 and is also fixedly connected to the spindle mechanism 9. The spindle mechanism 9 includes a cantilever 26, a fourth guide rail 27, a fifth guide rail 28, a propulsion assembly 29, a rotating assembly 30, a guide seat 31, and a follower post 32. The cantilever 26 is fixedly connected to the counterweight mechanism 8 and is also movably connected to the second guide rail 6. The propulsion assembly 29, the fourth guide rail 27, and the fifth guide rail 28 are all fixedly mounted on the cantilever 26. The rotating assembly 30 is movably mounted on the fourth guide rail 27 and is driven by the propulsion assembly 29. The guide seat 31 is movably mounted on the fourth guide rail 27 at the end away from the rotating assembly 30. The follower post 32 is movably mounted on the fifth guide rail 28.

[0033] An assembly table 10 is installed on the workbench 5. A fixed chuck 11 is provided on the side of the assembly table 10 near the column 4. A movable chuck 12 is provided on the side of the assembly table 10 away from the column 4, facing the fixed chuck 11. A third guide rail 13 is provided on the assembly table 10, and the movable chuck 12 is movably installed on the third guide rail 13.

[0034] When performing deep hole machining on a workpiece (optical fiber preform), the deep hole drill bit is mounted on the rotating assembly 30 after passing through the guide seat 31 and the follower 32 in sequence. Then, one end of the workpiece is first fixed on the fixed chuck 11 of the assembly table 10. Then, the movable chuck 12 moves laterally on the third guide rail 13 according to the length of the workpiece, and then fixes the other end of the workpiece. At this time, the second propulsion mechanism 7 drives the entire spindle mechanism 9 to perform X-axis feed motion, so that the height of the deep hole drill bit is aligned with the workpiece. The first propulsion mechanism 3 drives the worktable 5 and the assembly table 10 to perform Y-axis feed motion, so that the workpiece is aligned with the deep hole drill bit. Then, the rotating assembly 30 drives the deep hole drill bit to rotate, and the propulsion assembly 29 drives the rotating assembly 30 to perform Z-axis feed motion, thereby enabling the deep hole drill bit to perform deep hole machining on the workpiece.

[0035] The movable chuck 12 has a sliding adjustment design on the third guide rail 13, which allows for clamping of workpieces of different sizes. Therefore, when processing workpieces of different sizes, operators do not need to spend time and effort changing the fixtures, thereby improving processing efficiency and ease of operation.

[0036] The rotating assembly 30 drives the deep hole drill bit to rotate. When the feed assembly 29 drives the rotating assembly 30 and the deep hole drill bit to feed towards the workpiece, the guide seat 31 is used to accurately guide the drill bit into the workpiece, effectively preventing the drill bit from deviating when drilling begins, and ensuring that the drill bit enters the workpiece along the correct axis. The follower 32 is used to support the long and thin drill rod. It can provide additional support for the drill rod during the drilling process, preventing the drill rod from bending or deviating due to its own weight or cutting force, ensuring the stability and accuracy of the deep hole drill bit, thereby obtaining a high-quality deep hole.

[0037] The rotating assembly 30 is movably mounted on the fourth guide rail 27 so that the rotating assembly 30 can slide stably when it makes a feed motion. The guide seat 31 is movably mounted on the other end of the fourth guide rail 27, and the position of the guide seat on the fourth guide rail 27 is adjustable. For example, it can be fixed by bolts when the sliding guide seat 31 slides to adjust the distance from the rotating assembly 30, so as to accommodate deep hole drill bits of different lengths. The rotating assembly 30 includes a rotary motor and a slider. The slider is used to be movably connected to the fourth guide rail 27, and the rotary motor is used to drive the deep hole drill bit.

[0038] There are two follower posts 32, which are movably mounted on the fifth guide rail 28, so that the movement path of the follower posts 32 does not interfere with the rotating component 30. This avoids movement conflict between the follower posts 32 and the push component 29 when driving the rotating component 30 to perform feed movement. It also makes it easy to adjust the follower posts 32 to a suitable position to achieve the ideal use effect.

[0039] The first propulsion mechanism 3 consists of a motor, a lead screw connected to the motor, and a fixed block screwed to the lead screw. The fixed block is connected to the worktable 5. When in use, the motor is started, and the motor drives the lead screw, so that the fixed block drives the worktable 5 to move, thereby achieving the effect of driving the assembly table 10 and the workpiece. The composition and working principle of the second propulsion mechanism 7 and the propulsion assembly 29 are similar to those of the first propulsion mechanism 3, and will not be described in detail here.

[0040] Preferably, a movable support block 14 is provided between the fixed chuck 11 and the movable chuck 12, and the movable support block 14 is movably mounted on the third guide rail 13. A first elastic element 15 is provided between the movable support block 14 and the fixed chuck 11, and a second elastic element 33 is provided between the movable support block 14 and the movable chuck 12.

[0041] After the workpiece is clamped by the fixed chuck 11 and the movable chuck 12, the movable support block 14 located between the fixed chuck 11 and the movable chuck will support the middle part of the workpiece, thereby improving the overall stability of the workpiece during deep hole machining. This can effectively reduce the vibration and tremor of the workpiece during machining, especially under high-speed rotation conditions. This not only helps to improve the surface finish of the deep hole, but also reduces the wear of the drill bit and improves the machining accuracy. Furthermore, the movable support block 14 is movably mounted on the third guide rail 13, so that the position of the movable support block 14 can be adjusted according to the size of the workpiece to ensure that the movable support block 14 is in the optimal support position.

[0042] During the process of clamping the workpiece by moving the movable chuck 12 according to its dimensions, the movement of the movable chuck 12 compresses the second elastic element 33 between the movable chuck 12 and the movable support block 14. Since the movable chuck 12 is clamped to the workpiece, and due to the fixed chuck 11, its position is fixed, the compressed second elastic element 33, utilizing its elastic recovery property, pushes the movable support block 14 towards the fixed chuck 11. This causes the first elastic element 15 between the movable support block 14 and the fixed chuck 11 to be compressed. At this time, the compressed second elastic element 33... The thrust generated by the elastic recovery of the first elastic element 15 will counteract the thrust of the second elastic element 33. Since the elastic strength and length of the first elastic element 15 and the second elastic element 33 are the same, when the thrust applied by the first elastic element 15 and the second elastic element 33 to the movable support block 14 tends to be balanced, the position of the movable support block 14 can be pushed to the position between the fixed chuck 11 and the movable chuck 12 to achieve the best support effect for the workpiece. No manual intervention is required, which can flexibly adapt to workpieces of different lengths, simplify the adjustment process, and reduce operation time and cost.

[0043] In this embodiment, please refer to Figure 2 Furthermore, it is proposed that a first guide rod 16 is provided on one side of the fixed chuck 11. The first guide rod 16 passes through the movable support block 14 and the movable chuck 12 in sequence, so that the movable support block 14 and the movable chuck 12 can be movably connected to the first guide rod 16.

[0044] The first elastic element 15 and the second elastic element 33 are both sleeved on the first guide rod 16;

[0045] Through holes are provided on both the movable support block 14 and the movable chuck 12 for the first guide rod 16 to pass through, so that the movable support block 14 and the movable chuck 12 can move on the third guide rail 13 without being affected. The first elastic element 15 and the second elastic element 33 are sleeved on the first guide rod 16. The first guide rod 16 can be used to prevent the first elastic element 15 and the second elastic element 33 from folding when they are squeezed, and to prevent the first elastic element 15 (or the second elastic element 33) from jamming after folding, thereby improving stability.

[0046] In this embodiment, please refer to Figure 3-4 Furthermore, the movable support block 14 includes a bottom block 17 and a top block 18. The bottom block 17 is movably installed on the third guide rail 13. A slot 19 is opened on the upper end face of the bottom block 17. A third elastic element 20 is provided in the slot 19. The third elastic element 20 is connected to the top block 18.

[0047] When dealing with workpieces of different diameters, taking the workpiece with a smaller diameter as an example, the third elastic element 20 provided in the slot 19 of the bottom block 17 can be used to push the top block 18 on the top of the bottom block 17 upward, so that the top block 18 contacts the workpiece and supports the workpiece, thereby enabling support for workpieces of different diameters.

[0048] Preferably, a guide groove 21 is provided on the bottom surface of the slot 19, and a second guide rod 22 is movably arranged in the guide groove 21. The second guide rod 22 is fixedly connected to the top block 18.

[0049] The guide groove 21 opened in the slot 19 is used to provide space for the second guide rod 22 to move up and down when the top block 18 moves up and down. It can also make the second guide rod 22 move in a directional manner, so that the top block 18 always keeps a straight line and avoids the top block 18 from tilting and affecting the support effect on the workpiece. Furthermore, the third elastic element 20 can be sleeved on the second guide rod 22 to prevent the third elastic element 20 from tilting.

[0050] Preferably, the top surface of the top block 18 has an arc-shaped structure;

[0051] The arc-shaped structure on the top surface of the top block 18 allows for better contact with the workpiece, resulting in a wider range of support adaptability.

[0052] Furthermore, the first elastic element 15, the second elastic element 33, and the third elastic element 20 are all springs; the use of springs allows the first elastic element 15 and the second elastic element 33 to be better fitted onto the first guide rod 16, and allows the third elastic element 20 to be better fitted onto the second guide rod 22.

[0053] In this embodiment, please refer to Figure 5 Furthermore, it is proposed that the counterweight mechanism 8 includes a pulley 23, a steel cable 24 and a counterweight block 25. The pulley 23 is fixedly installed on the upper end face of the column 4, and the pulley 23 is connected to the steel cable 24 in a transmission connection. One end of the steel cable 24 is fixedly connected to the counterweight block 25, and the other end is fixedly connected to the main shaft mechanism 9.

[0054] When the second propulsion mechanism 7 drives the main spindle mechanism 9 to perform a forceful motion, the main spindle mechanism 9 will use the steel cable 24 and pulley 23 to drive the counterweight 25. The counterweight 25 can balance the torque, thereby reducing the load on the second propulsion mechanism 7 when driving the main spindle mechanism 9. This makes the movement position of the main spindle mechanism 9 more accurate, while avoiding the impact of high load on the life of the second propulsion mechanism 7, achieving the effect of high processing accuracy and long service life.

[0055] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An improved three-axis linkage deep hole machining device, comprising a base (1), wherein a first guide rail (2), a first propulsion mechanism (3), and a column (4) are provided on the base (1), the first guide rail (2) is fixedly installed on the base (1), and a worktable (5) is provided on the first guide rail (2), the worktable (5) is movably installed on the first guide rail (2), the first propulsion mechanism (3) is fixedly installed on the base (1), and the first propulsion mechanism (3) is drively connected to the worktable (5), and the column (4) is fixedly installed on the base (1) at one end away from the worktable (5), and The column (4) is provided with a second guide rail (6), a second propulsion mechanism (7), and a counterweight mechanism (8). The second guide rail (6) is fixedly installed on the side of the column (4), and a main shaft mechanism (9) is provided on the second guide rail (6). The main shaft mechanism (9) is movably installed on the second guide rail (6). The second propulsion mechanism (7) is fixedly installed on the column (4), and the second propulsion mechanism (7) is drively connected to the main shaft mechanism (9). The counterweight mechanism (8) is fixedly installed on the column (4), and the counterweight mechanism (8) is fixedly connected to the main shaft mechanism (9). The column (4) is characterized in that... An assembly table (10) is installed on the workbench (5). A fixed chuck (11) is provided on the side of the assembly table (10) near the column (4). A movable chuck (12) is provided on the side of the assembly table (10) away from the column (4) and facing the fixed chuck (11). A third guide rail (13) is provided on the assembly table (10). The movable chuck (12) is movably installed on the third guide rail (13). A movable support block (14) is provided between the fixed chuck (11) and the movable chuck (12), and the movable support block (14) is movably installed on the third guide rail (13). A first elastic element (15) is provided between the movable support block (14) and the fixed chuck (11), and a second elastic element (33) is provided between the movable support block (14) and the movable chuck (12).

2. The improved three-axis linkage deep hole machining device according to claim 1, characterized in that, The fixed chuck (11) is provided with a first guide rod (16) on one side. The first guide rod (16) passes through the movable support block (14) and the movable chuck (12) in sequence, so that the movable support block (14) and the movable chuck (12) can be movably connected to the first guide rod (16). The first elastic element (15) and the second elastic element (33) are both sleeved on the first guide rod (16).

3. The improved three-axis linkage deep hole machining device according to claim 2, characterized in that, The movable support block (14) includes a bottom block (17) and a top block (18). The bottom block (17) is movably mounted on the third guide rail (13). A slot (19) is opened on the upper surface of the bottom block (17). A third elastic element (20) is provided in the slot (19). The third elastic element (20) is connected to the top block (18).

4. The improved three-axis linkage deep hole machining device according to claim 3, characterized in that, A guide groove (21) is provided on the bottom surface of the slot (19), and a second guide rod (22) is movably arranged in the guide groove (21). The second guide rod (22) is fixedly connected to the top block (18).

5. The improved three-axis linkage deep hole machining device according to claim 3, characterized in that, The top surface of the top block (18) has an arc-shaped structure.

6. The improved three-axis linkage deep hole machining device according to claim 3, characterized in that, The first elastic element (15), the second elastic element (33) and the third elastic element (20) are all springs.

7. The improved three-axis linkage deep hole machining device according to claim 1, characterized in that, The counterweight mechanism (8) includes a pulley (23), a steel cable (24) and a counterweight block (25). The pulley (23) is fixedly installed on the upper end face of the column (4) and the pulley (23) is connected to the steel cable (24) in a transmission connection. One end of the steel cable (24) is fixedly connected to the counterweight block (25) and the other end is fixedly connected to the main shaft mechanism (9).

8. The improved three-axis linkage deep hole machining device according to claim 1, characterized in that, The main spindle mechanism (9) includes a cantilever (26), a fourth guide rail (27), a fifth guide rail (28), a propulsion assembly (29), a rotating assembly (30), a guide seat (31), and a follower post (32). The cantilever (26) is fixedly connected to the counterweight mechanism (8) and movably connected to the second guide rail (6). The propulsion assembly (29), the fourth guide rail (27), and the fifth guide rail (28) are all fixedly mounted on the cantilever (26). The rotating assembly (30) is movably mounted on the fourth guide rail (27) and is connected to the propulsion assembly (29) via a transmission. The guide seat (31) is movably mounted on the fourth guide rail (27) at one end away from the rotating assembly (30). The follower post (32) is movably mounted on the fifth guide rail (28).

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