A drilling device for processing copper bearing bush

Abstract

This invention provides a drilling device for processing copper bearing bushes, relating to the field of drilling technology. It includes a frame, with a worktable fixedly connected to the inner surface of the frame. An electric slide rail is fixedly connected to the upper surface of the worktable. A sliding frame is slidably connected to the outer surface of the electric slide rail. A cylinder is mounted on the inner surface of the sliding frame. A partition and a support plate are sequentially fixedly connected from top to bottom to the inner surface of the side wall of the mounting frame. This invention utilizes the axial reaction force generated during drilling to push the mounting rod upwards, disconnecting the power between the rotating disk and the second gear, and switching to a reduction transmission state formed by the first and third gears. This automatically reduces the drill bit speed according to changes in drilling load, reducing instantaneous impact on the drill bit and temperature rise in the cutting area. It also reduces drill bit vibration, wear, and chip adhesion problems caused by changes in material hardness during copper bearing bush processing, improving the stability of the drilling process.

Description

Technical Field

[0001] This invention relates to the field of drilling technology, and in particular to a drilling apparatus for machining copper bearing bushes. Background Technology

[0002] As a crucial support component in mechanical transmission systems, copper bearing shells typically require lubrication holes machined on their surface to allow lubricating media to enter between the bearing shell and the shaft, reducing frictional losses during operation. Currently, the machining of these oil holes on copper bearing shells usually employs drilling equipment, using a rotating drill bit to complete the hole structure. However, existing drilling equipment has certain shortcomings when machining copper bearing shells. During drilling, localized hardness differences may exist within the internal structure of the copper bearing shell during production. When the drill bit enters a hard region, the drilling resistance suddenly increases, and existing drilling equipment typically uses a fixed rotation speed. Traditional drilling methods cannot automatically adjust the working state of the drill bit according to changes in drilling load, which can easily cause drill bit vibration, impact, or even damage. In addition, some copper bearings have an arc-shaped structure, and their surfaces to be machined are not flat. Ordinary drill bits lack an effective guiding structure when initially contacting the bearing surface, which can easily cause drilling deviation due to insufficient contact stability, affecting the positional accuracy of the oil hole. At the same time, during the drilling process, traditional cooling and lubrication methods usually adopt a continuous fluid supply method, which cannot adjust the lubricant supply according to changes in drilling load. When the drilling resistance suddenly increases, the lubrication and cooling effect cannot be improved in time. To address these issues, we propose a drilling device for processing copper bearings. Summary of the Invention

[0003] The purpose of this invention is to solve the above-mentioned problems by providing a drilling device for machining copper bearing bushes.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a drilling device for processing copper bearing bushes, comprising a frame, a worktable fixedly connected to the inner surface of the frame, an electric slide rail fixedly connected to the upper surface of the worktable, a sliding frame slidably connected to the outer surface of the electric slide rail, a cylinder mounted on the inner surface of the sliding frame, a mounting bracket fixedly connected to the output end of the cylinder, a partition plate and a support plate fixedly connected sequentially from top to bottom on the inner surface of the side wall of the mounting bracket, a connecting rod rotatably connected between the partition plate and the support plate via a bearing, a first gear, a connecting plate, a rotating disk, and a second gear sequentially arranged from top to bottom on the outer surface of the connecting rod, the first gear fixedly connected to the outer surface of the connecting rod, the second gear rotatably connected to the connecting rod via a bearing, and multiple slots formed on the upper surface of the second gear. The plate is slidably sleeved on the outer surface of the connecting rod. The rotating disk is rotatably connected to the lower surface of the connecting plate via bearings. Multiple limiting blocks are fixedly connected to the inner surface of the rotating disk. Multiple limiting grooves are opened on the outer surface of the connecting rod. The limiting blocks are slidably connected to the limiting grooves. Multiple helical teeth are fixedly connected to the lower surface of the rotating disk. The helical teeth engage with the slots. A support cylinder is fixedly connected to the lower surface of the mounting frame. A lifting plate is slidably connected to the inner surface of the support cylinder. A drill bit is rotatably connected to the lower surface of the lifting plate via bearings. An installation rod is fixedly connected to the upper surface of the drill bit. A third gear and a fourth gear are fixedly connected to the outer surface of the installation rod from top to bottom. The third gear meshes with the first gear, and the fourth gear meshes with the second gear. The other end of the connecting plate is rotatably connected to the installation rod via bearings.

[0005] Preferably, the rotating disk is movably connected to the connecting rod, the mounting rod passes through the lifting plate and is rotatably connected to the lifting plate, and the drill bit is rotatably connected to the inner surface of the support cylinder.

[0006] Preferably, a plurality of limiting rods are fixedly connected to the upper surface of the lifting plate, the limiting rods pass through the support cylinder and are slidably connected to the support cylinder, and a spring is fixedly connected between the support cylinder and the lifting plate.

[0007] Preferably, the inner surfaces of the drill bit and the mounting rod are both provided with through holes, the inner surface of the through holes is provided with positioning holes, the inner surface of the positioning holes is slidably connected to a center drill, the upper surface of the center drill is fixedly connected to a connecting pipe, the connecting pipe is rotatably connected to the through holes, the upper surface of the mounting rod is fixedly connected to a fixing pipe, the center of the bottom inner surface of the fixing pipe is fixedly connected to an mounting pipe, the outer surface of the mounting pipe is provided with a lifting block and a fixing block from top to bottom, the outer surface of the lifting block is hinged with a plurality of first rotating plates, the outer surface of the fixing block is hinged with a plurality of second rotating plates, the other end of each of the second rotating plates is hinged to the center of the first rotating plate, the upper surface of the lifting block is fixedly connected to a lifting pipe, the lifting pipe is fixedly connected to the connecting pipe, and the other end of each of the first rotating plates is fixedly connected to a counterweight ball.

[0008] Preferably, the lifting pipe is slidably connected between the fixed pipe and the mounting pipe.

[0009] Preferably, the lifting block is slidably connected to the outer surface of the mounting tube, and the mounting tube is slidably connected to the outer surface of the connecting tube.

[0010] Preferably, a fixing plate is fixedly connected to the inner surface of the fixing tube, and a push rod is fixedly connected to the lower surface of the fixing plate, the push rod being slidably connected to the inner surface of the connecting tube.

[0011] Preferably, the upper surface of the fixed tube is connected to a liquid inlet pipe, the outer surface of the connecting tube is provided with multiple through holes, and the outer surface of the drill bit is provided with a liquid outlet hole.

[0012] Preferably, the inlet pipe is fixedly connected to the mounting bracket.

[0013] Preferably, a motor is fixedly connected to the inner surface of the top of the mounting bracket, and the output end of the motor is fixedly connected to the connecting rod.

[0014] Compared with the prior art, the advantages and positive effects of the present invention are as follows: 1. This invention proposes a drilling device for processing copper bearing bushes. By setting up a floating mounting rod, a lifting plate, a connecting plate, a rotating disk, and a double gear transmission structure, when the drill bit encounters a hard area inside the bearing bush during drilling, it can use the axial reaction force generated by drilling to push the mounting rod upward, thereby disconnecting the power between the rotating disk and the second gear and switching to a deceleration transmission state formed by the first gear and the third gear, thus automatically reducing the drill bit speed according to the change of drilling load.

[0015] 2. This invention proposes a drilling device for machining copper bearing bushes. It utilizes a centrifugal adjustment structure at the top of the mounting rod, consisting of a counterweight ball, a first rotating plate, a second rotating plate, and a lifting block. This structure allows the center drill to automatically extend and retract according to the drill bit's rotation speed. During high-speed drilling, centrifugal force drives the center drill to extend, pre-positioning the bearing bush machining area. This improves the guiding ability of the drill bit during initial entry and reduces the probability of drill bit deviation when machining curved bearing bush surfaces. When the drilling load increases, causing the rotation speed to decrease, the centrifugal force of the counterweight ball decreases, causing the center drill to automatically retract, preventing it from continuously bearing a large cutting load and extending its service life.

[0016] 3. This invention proposes a drilling device for machining copper bearing bushes. It utilizes the drilling reaction force to drive the mounting rod to move axially, and in conjunction with a fixed plate, push rod, connecting pipe, and unidirectional fluid supply structure, it can simultaneously squeeze the internally stored cutting fluid when the drill bit is subjected to large cutting resistance. The cutting fluid is then discharged to the machining area through the fluid outlet hole on the drill bit. This automatically enhances the lubrication and cooling effect of the drilling area according to the changes in drilling load, reduces the friction and adhesion between the copper material and the drill bit, and improves the machining quality of the hole wall. Attached Figure Description

[0017] Figure 1 This invention provides a schematic diagram of the external structure of a drilling device for machining copper bearing bushes. Figure 2 This invention provides a schematic diagram of the internal structure of a drilling device for machining copper bearing bushes. Figure 3 This invention provides a partial structural schematic diagram of a drilling device for machining copper bearing bushes. Figure 4 This invention provides a partial internal structural diagram of the mounting frame for a drilling device used in the machining of copper bearing bushes. Figure 5 This invention provides a partial internal structural diagram of the support cylinder of a drilling device for processing copper bearing bushes. Figure 6 This invention provides a partial cross-sectional view of the rotating disk of a drilling device for machining copper bearing bushes. Figure 7 This invention provides a partial structural diagram of the fixing tube of a drilling device for machining copper bearing bushes; Figure 8 for Figure 6 A magnified schematic diagram of the structure at point A in the middle.

[0018] Legend: 1. Frame; 2. Workbench; 3. Electric slide rail; 4. Sliding frame; 5. Cylinder; 6. Mounting frame; 7. Partition plate; 8. Support plate; 9. Connecting rod; 10. First gear; 11. Connecting plate; 12. Rotating disk; 13. Second gear; 14. Slot; 15. Helical gear; 16. Support cylinder; 17. Lifting plate; 18. Drill bit; 19. Mounting rod; 20. Third gear; 21. Fourth gear; 22. Limiting rod; 23. Through hole; 24. Positioning hole; 25. Center drill; 26. Connecting pipe; 27. Fixing pipe; 28. Mounting pipe; 29. ​​Lifting block; 30. Fixing block; 31. First rotating plate; 32. Second rotating plate; 33. Lifting pipe; 34. Fixing plate; 35. Push rod; 36. Liquid inlet pipe; 37. Through hole; 38. Liquid outlet hole; 39. Motor. Detailed Implementation

[0019] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0020] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways than those described herein, and therefore the invention is not limited to the specific embodiments disclosed in the following specification.

[0021] Example 1, as Figure 1 - Figure 8As shown, a drilling device for processing copper bearing bushes includes a frame 1. A worktable 2 is fixedly connected to the inner surface of the frame 1. An electric slide rail 3 is fixedly connected to the upper surface of the worktable 2. A sliding frame 4 is slidably connected to the outer surface of the electric slide rail 3. A cylinder 5 is installed on the inner surface of the sliding frame 4. A mounting frame 6 is fixedly connected to the output end of the cylinder 5. A partition plate 7 and a support plate 8 are fixedly connected sequentially from top to bottom on the inner surface of the side wall of the mounting frame 6. A connecting rod 9 is rotatably connected between the partition plate 7 and the support plate 8 via a bearing. A first gear 10, a connecting plate 11, a rotating disk 12, and a second gear 13 are sequentially arranged sequentially from top to bottom on the outer surface of the connecting rod 9. The first gear 10 is fixedly connected to the outer surface of the connecting rod 9. The second gear 13 is rotatably connected to the connecting rod 9 via a bearing. Multiple slots 14 are formed on the upper surface of the second gear 13. The connecting plate 11 is slidably sleeved on the outer surface of the connecting rod 9. The rotating disk 12 is rotatably connected to the lower surface of the connecting plate 11 via bearings. Multiple limiting blocks are fixedly connected to the inner surface of the rotating disk 12. Multiple limiting grooves are opened on the outer surface of the connecting rod 9. The limiting blocks are slidably connected to the limiting grooves. Multiple helical teeth 15 are fixedly connected to the lower surface of the rotating disk 12. The helical teeth 15 are engaged with the slots 14. A support cylinder 16 is fixedly connected to the lower surface of the mounting bracket 6. A lifting plate 17 is slidably connected to the inner surface of the support cylinder 16. A drill bit 18 is rotatably connected to the lower surface of the lifting plate 17 via bearings. An installation rod 19 is fixedly connected to the upper surface of the drill bit 18. A third gear 20 and a fourth gear 21 are fixedly connected to the outer surface of the installation rod 19 from top to bottom. The third gear 20 is meshed with the first gear 10, and the fourth gear 21 is meshed with the second gear 13. The other end of the connecting plate 11 is rotatably connected to the installation rod 19 via bearings.

[0022] The overall effect of Embodiment 1 is as follows: the electric slide rail 3 drives the sliding frame 4 to move along the worktable 2, causing the mounting frame 6 to move to the bearing bush to be processed position. Subsequently, the cylinder 5 pushes the mounting frame 6 downward, causing the drill bit 18 below the mounting frame 6 to approach the bearing bush processing area. The bottom helical teeth 15 of the rotating disk 12 below the connecting plate 11 are engaged with the slot 14 on the upper surface of the second gear 13, so that the rotating disk 12 can drive the second gear 13 to rotate synchronously. The second gear 13 drives the fourth gear 21 on the mounting rod 19 to rotate, thereby driving the mounting rod 19 and the drill bit 18 to rotate. As the mounting rod rotates, the central drill 25 inside the mounting rod rotates synchronously with the drill bit 18. The cutting reaction force on the drill bit 18 increases, and the helical teeth 15 at the bottom of the rotating disk 12 gradually disengage from the slot 14 on the upper surface of the second gear 13. At this time, the power transmission between the second gear 13 and the connecting rod 9 is disconnected, while the fourth gear 21 remains engaged with the second gear 13. As the mounting rod 19 continues to move upward, the third gear 20 engages with the first gear 10, causing the connecting rod 9 to drive the third gear 20 to rotate through the first gear 10, and thus driving the mounting rod 19 and the drill bit 18 to continue rotating.

[0023] Example 2, as Figure 1 - Figure 8 As shown, the rotating disk 12 is movably connected to the connecting rod 9. The mounting rod 19 passes through the lifting plate 17 and is rotatably connected to the lifting plate 17. The drill bit 18 is rotatably connected to the inner surface of the support cylinder 16. Multiple limiting rods 22 are fixedly connected to the upper surface of the lifting plate 17. The limiting rods 22 pass through the support cylinder 16 and are slidably connected to the support cylinder 16. A spring is fixedly connected between the support cylinder 16 and the lifting plate 17. Through holes 23 are opened on the inner surfaces of the drill bit 18 and the mounting rod 19. Positioning holes 24 are opened on the inner surface of the through holes 23. A center drill 25 is slidably connected to the inner surface of the positioning holes 24. A connecting pipe 26 is fixedly connected to the upper surface of the center drill 25. 6 is rotatably connected to the through hole 23. The upper surface of the mounting rod 19 is fixedly connected to the fixing tube 27. The center of the bottom inner surface of the fixing tube 27 is fixedly connected to the mounting tube 28. The outer surface of the mounting tube 28 is provided with a lifting block 29 and a fixing block 30 from top to bottom. Multiple first rotating plates 31 are hinged to the outer surface of the lifting block 29. Multiple second rotating plates 32 are hinged to the outer surface of the fixing block 30. The other end of each second rotating plate 32 is hinged to the center of the first rotating plate 31. The upper surface of the lifting block 29 is fixedly connected to the lifting tube 33. The lifting tube 33 is fixedly connected to the connecting tube 26. The other end of each first rotating plate 31 is fixedly connected to a counterweight ball.

[0024] The overall effect of Embodiment 2 is that the counterweight ball on the first rotating plate 31 rotates with the first rotating plate 31 and drives the first rotating plate 31 to deflect outward under the action of centrifugal force, which in turn pushes the second rotating plate 32 to deflect, causing the lifting block 29 to move downward along the mounting tube 28 and approach the fixed block 30. During the movement of the lifting block 29, the lifting tube 33 and the connecting tube 26 are driven to descend synchronously, so that the center drill 25 extends out along the positioning hole 24 at the end of the drill bit 18. The center drill 25 first contacts the processing position of the copper bearing and forms a positioning. When the drill bit 18 encounters a hard area inside the copper bearing during drilling, the cutting reaction force on the drill bit 18 increases, causing the drill bit 18, mounting rod 19, and lifting plate 17 connected to the mounting rod 19 to overcome the spring force and move upward along the axis of the support cylinder 16. After the rotation speed of the drill bit 18 decreases, the counterweight ball drives the first rotating plate 31 to retract, causing the lifting block 29 to move upward along the mounting tube 28. When the lifting block 29 moves upward, it drives the lifting tube 33 and the connecting tube 26 to rise synchronously, causing the center drill 25 to retract into the drill bit 18 along the direction of the positioning hole 24.

[0025] Example 3, as Figure 1 - Figure 8As shown, the lifting pipe 33 is slidably connected between the fixed pipe 27 and the mounting pipe 28. The lifting block 29 is slidably connected to the outer surface of the mounting pipe 28. The mounting pipe 28 is slidably connected to the outer surface of the connecting pipe 26. A fixed plate 34 is fixedly connected to the inner surface of the fixed pipe 27. A push rod 35 is fixedly connected to the lower surface of the fixed plate 34. The push rod 35 is slidably connected to the inner surface of the connecting pipe 26. An inlet pipe 36 is connected to the upper surface of the fixed pipe 27. Multiple through holes 37 are opened on the outer surface of the connecting pipe 26. An outlet hole 38 is opened on the outer surface of the drill bit 18. The inlet pipe 36 is fixedly connected to the mounting frame 6. A motor 39 is fixedly connected to the inner surface of the top of the mounting frame 6. The output end of the motor 39 is fixedly connected to the connecting rod 9.

[0026] The effect achieved by the entire embodiment 3 is as follows: the output end of the motor 39 drives the connecting rod 9 to rotate. When the mounting rod 19 is moved upward by the reaction force, the fixed tube 27 moves synchronously with the mounting rod 19, while the fixed plate 34 and the push rod 35 set below the fixed plate 34 remain in a constant relative position. The connecting tube 26 moves upward relative to the fixed tube 27, so that the push rod 35 gradually enters the interior of the connecting tube 26, which exerts a squeezing effect on the cutting fluid inside the connecting tube 26. Since the inlet pipe 36 is equipped with a one-way valve, the cutting fluid can only enter the interior of the fixed tube 27 from the outside through the inlet pipe 36. When the push rod 35 exerts a squeezing force on the liquid inside the connecting tube 26, the cutting fluid enters the interior of the drill bit 18 through the through hole 37 on the outer surface of the connecting tube 26, and is discharged to the drilling area through the outlet hole 38 on the outer surface of the drill bit 18, which lubricates and cools the contact position between the drill bit 18 and the copper bearing.

[0027] Working principle: The copper bearing to be processed is placed on the worktable 2. The sliding frame 4 is driven by the electric slide rail 3 to move along the worktable 2, so that the mounting frame 6 moves to the bearing to be processed position. Then, the cylinder 5 pushes the mounting frame 6 downward, so that the drill bit 18 below the mounting frame 6 is close to the bearing processing area. After the motor 39 is started, the output end of the motor 39 drives the connecting rod 9 to rotate. The connecting rod 9 drives the first gear 10 and the rotating disk 12 to rotate synchronously. During the initial drilling process, the axial resistance of the drill bit 18 is small. The mounting rod 19 is in the initial position inside the support cylinder 16. The bottom helical teeth 15 of the rotating disk 12 below the connecting plate 11 are engaged with the groove 14 on the upper surface of the second gear 13, so that the rotating disk 12 can drive the second gear 13 synchronously. The connecting rod 9 rotates, and the limiting block is always inside the limiting groove, so that the rotating disk 12 can rotate synchronously when the connecting rod 9 rotates. The second gear 13 drives the fourth gear 21 on the mounting rod 19 to rotate, thereby driving the mounting rod 19 and the drill bit 18 to rotate. Since the diameter of the second gear 13 is larger than the diameter of the fourth gear 21, the second gear 13 and the fourth gear 21 form a speed-increasing transmission, so that the drill bit 18 maintains a high speed for drilling. The center drill 25 inside the mounting rod 19 rotates synchronously with the drill bit 18. The mounting rod 19 drives the fixed tube 27 to rotate, and the fixed tube 27 drives the mounting tube 28 to rotate. The mounting tube 28 is provided with a lifting block 29 and a fixing block 30 on its outer side. When the drill bit 18 is in a high-speed rotating state, the first rotating plate 31 is provided with a lifting block 29 and a fixing block 30. The counterweight ball rotates with the first rotating plate 31 and, under the action of centrifugal force, drives the first rotating plate 31 to deflect outward, pushing the second rotating plate 32 to deflect as well. This causes the lifting block 29 to move downward along the mounting tube 28 and approach the fixed block 30. During the movement of the lifting block 29, the lifting tube 33 and the connecting tube 26 descend synchronously, causing the center drill 25 to extend out along the positioning hole 24 at the end of the drill bit 18. The cross-section of the center drill 25 and the positioning hole 24 is rectangular, allowing it to rotate synchronously with the drill bit 18. The center drill 25 preferentially contacts the processing position of the copper bearing and forms a positioning, guiding the cutting direction of the subsequent drill bit 18. When the drill bit encounters a hard area inside the copper bearing during drilling, the cutting reaction force on the drill bit 18 increases, causing the drill bit 18 to... The mounting rod 19 and the lifting plate 17 connected to the mounting rod 19 overcome the spring force and move upward along the axis of the support cylinder 16. During the upward movement of the lifting plate 17, the mounting rod 19 synchronously drives the connecting plate 11 to slide along the axis of the connecting rod 19. The connecting plate 11 pushes the rotating disk 12 upward, causing the helical teeth 15 at the bottom of the rotating disk 12 to gradually disengage from the slots 14 on the upper surface of the second gear 13. At this time, the power transmission between the second gear 13 and the connecting rod 9 is disconnected, while the fourth gear 21 remains engaged with the second gear 13. As the mounting rod 19 continues to move upward, the third gear 20 engages with the first gear 10, causing the connecting rod 9 to drive the third gear 20 to rotate through the first gear 10, and driving the mounting rod 19 and the drill bit 18 to continue rotating.Since the diameter of the first gear 10 is smaller than that of the third gear 20, the first gear 10 and the third gear 20 form a reduction transmission, causing the drill bit 18 to switch from high-speed drilling to low-speed drilling, thus improving drilling stability. After the drill bit 18's rotation speed decreases, the counterweight ball drives the first rotating plate 31 to retract, causing the lifting block 29 to move upward along the mounting tube 28. When the lifting block 29 moves upward, it drives the lifting tube 33 and the connecting tube 26 to rise synchronously, causing the center drill 25 to retract into the drill bit 18 along the direction of the positioning hole 24. At the same time, when the mounting rod 19 is subjected to a reaction force and moves upward, the fixing tube 27 moves synchronously with the mounting rod 19, while the fixing plate 34... The push rod 35, located below the fixed plate 34, remains in a fixed position. The connecting pipe 26 moves upward relative to the fixed pipe 27, causing the push rod 35 to gradually enter the connecting pipe 26. A seal is provided between the fixed pipe 27 and the rising pipe 33, which compresses the cutting fluid inside the connecting pipe 26. Because the inlet pipe 36 has a one-way valve, the cutting fluid can only enter the fixed pipe 27 from the outside via the inlet pipe 36. When the push rod 35 compresses the fluid inside the connecting pipe 26, the cutting fluid enters the drill bit 18 through the through hole 37 on the outer surface of the connecting pipe 26 and is discharged into the drilling area through the outlet hole 38 on the outer surface of the drill bit 18.

[0028] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A drilling device for machining copper bearing bushes, comprising a frame (1), characterized in that: A workbench (2) is fixedly connected to the inner surface of the frame (1). An electric slide rail (3) is fixedly connected to the upper surface of the workbench (2). A sliding frame (4) is slidably connected to the outer surface of the electric slide rail (3). A cylinder (5) is installed on the inner surface of the sliding frame (4). A mounting bracket (6) is fixedly connected to the output end of the cylinder (5). A partition plate (7) and a support plate (8) are fixedly connected from top to bottom on the inner surface of the side wall of the mounting bracket (6). The partition plate (7) and the support plate (8) are connected by a bearing. A connecting rod (9) is movably connected. From top to bottom, the outer surface of the connecting rod (9) is sequentially provided with a first gear (10), a connecting plate (11), a rotating disk (12), and a second gear (13). The first gear (10) is fixedly connected to the outer surface of the connecting rod (9), and the second gear (13) is rotatably connected to the connecting rod (9) via a bearing. The upper surface of the second gear (13) has multiple slots (14). The connecting plate (11) is slidably fitted onto the outer surface of the connecting rod (9), and the rotating disk (12)... 2) The rotating disk (12) is rotatably connected to the lower surface of the connecting plate (11) via bearings. Multiple limiting blocks are fixedly connected to the inner surface of the rotating disk (12). Multiple limiting grooves are opened on the outer surface of the connecting rod (9). The limiting blocks are slidably connected to the limiting grooves. Multiple helical teeth (15) are fixedly connected to the lower surface of the rotating disk (12). The helical teeth (15) engage with the slots (14). A support cylinder (16) is fixedly connected to the lower surface of the mounting bracket (6). A lifting plate (1) is slidably connected to the inner surface of the support cylinder (16). 7) The lower surface of the lifting plate (17) is rotatably connected to a drill bit (18) via a bearing. The upper surface of the drill bit (18) is fixedly connected to an installation rod (19). The outer surface of the installation rod (19) is fixedly connected to a third gear (20) and a fourth gear (21) from top to bottom. The third gear (20) meshes with the first gear (10), and the fourth gear (21) meshes with the second gear (13). The other end of the connecting plate (11) is rotatably connected to the installation rod (19) via a bearing.

2. The drilling device for machining copper bearing bushes according to claim 1, characterized in that: The rotating disk (12) is movably connected to the connecting rod (9), the mounting rod (19) passes through the lifting plate (17) and is rotatably connected to the lifting plate (17), and the drill bit (18) is rotatably connected to the inner surface of the support cylinder (16).

3. The drilling device for machining copper bearing bushes according to claim 2, characterized in that: The upper surface of the lifting plate (17) is fixedly connected with a plurality of limiting rods (22), the limiting rods (22) penetrate through the support cylinder (16) and are slidably connected to the support cylinder (16), and a spring is fixedly connected between the support cylinder (16) and the lifting plate (17).

4. The drilling device for machining copper bearing bushes according to claim 1, characterized in that: Both the drill bit (18) and the mounting rod (19) have through holes (23) on their inner surfaces. A positioning hole (24) is formed on the inner surface of the through hole (23). A center drill (25) is slidably connected to the inner surface of the positioning hole (24). A connecting pipe (26) is fixedly connected to the upper surface of the center drill (25). The connecting pipe (26) is rotatably connected to the through hole (23). A fixing pipe (27) is fixedly connected to the upper surface of the mounting rod (19). An mounting pipe (28) is fixedly connected to the center of the bottom inner surface of the fixing pipe (27). The outer surface of the 28) is provided with a lifting block (29) and a fixing block (30) from top to bottom. The outer surface of the lifting block (29) is hinged with a plurality of first rotating plates (31), and the outer surface of the fixing block (30) is hinged with a plurality of second rotating plates (32). The other end of each of the second rotating plates (32) is hinged to the center of the first rotating plate (31). The upper surface of the lifting block (29) is fixedly connected with a lifting pipe (33), and the lifting pipe (33) is fixedly connected to the connecting pipe (26). The other end of each of the first rotating plates (31) is fixedly connected with a counterweight ball.

5. The drilling device for machining copper bearing bushes according to claim 4, characterized in that: The lifting tube (33) is slidably connected between the fixed tube (27) and the mounting tube (28).

6. The drilling device for machining copper bearing bushes according to claim 4, characterized in that: The lifting block (29) is slidably connected to the outer surface of the mounting tube (28), and the mounting tube (28) is slidably connected to the outer surface of the connecting tube (26).

7. The drilling device for machining copper bearing bushes according to claim 4, characterized in that: A fixing plate (34) is fixedly connected to the inner surface of the fixing tube (27), and a push rod (35) is fixedly connected to the lower surface of the fixing plate (34). The push rod (35) is slidably connected to the inner surface of the connecting tube (26).

8. The drilling device for machining copper bearing bushes according to claim 7, characterized in that: The upper surface of the fixed tube (27) is connected to the liquid inlet tube (36), the outer surface of the connecting tube (26) is provided with multiple through holes (37), and the outer surface of the drill bit (18) is provided with a liquid outlet hole (38).

9. The drilling device for machining copper bearing bushes according to claim 8, characterized in that: The inlet pipe (36) is fixedly connected to the mounting bracket (6).

10. The drilling device for machining copper bearing bushes according to claim 9, characterized in that: A motor (39) is fixedly connected to the inner surface of the top of the mounting bracket (6), and the output end of the motor (39) is fixedly connected to the connecting rod (9).

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