Gear pump machining drilling device with protection function

Abstract

The present application relates to the technical field of drilling, and discloses a drilling device with a protection function for gear pump machining, which comprises an anti-overload movement mechanism and a sleeving protection mechanism, and the structure comprises a movable protection plate fixedly installed on the periphery of a hollow rotating shaft body and used for protecting the area directly above a drill rod, a protection sleeve sleeved on the periphery of the movable protection plate and used for protecting the periphery of the drill rod, and a cutting fluid discharge channel used for discharging cutting fluid around the drill rod. The drilling device with the protection function for the gear pump machining can protect the metal swarf generated by the drill rod on the basis of ensuring machining cooling, in addition, the device can provide necessary protection measures when the drill rod is axially fed and twisted, can effectively reduce the phenomenon that the drill rod is forged due to large axial feeding stroke and torsional overload, and further improves the safety protection degree in the machining process.

Description

Technical Field

[0001] This invention relates to the field of drilling technology, specifically to a drilling device for processing gear pumps with protective functions. Background Technology

[0002] When processing gear pumps, drilling is required. Due to the high-speed rotation of the drill rod, the generated scrap metal chips will fly around under the action of kinetic energy, which can easily cause injury to processing personnel, posing a significant safety hazard.

[0003] Therefore, the mainstream gear pump drilling equipment with protective functions is to add a protective sleeve to the outside of the drill rod. When the drill rod drills, the metal chips generated are blocked inside the protective sleeve, thereby reducing the occurrence of metal chip splashes that could cause injury to the processing personnel.

[0004] In actual processing, due to the limitations of the protective sleeve, the drill rod and gear generate metallic heat during high-speed friction. This heat cannot be dissipated in time, which seriously affects the service life of the drill rod. In addition, the greatest danger of the drill rod during processing is that it may break due to excessive feed or structural jamming. This breakage, combined with the kinetic energy generated by high-speed rotation, can easily cause even greater damage. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a drilling device for gear pump machining with protective functions. It protects against metal shavings generated by the drill rod while ensuring machining cooling. Furthermore, the device provides necessary protective measures for the drill rod during axial feed and torsion, effectively reducing the risk of drill rod breakage due to large axial feed stroke and torque overload, further improving safety during machining, and solving the aforementioned technical problems.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a drilling device for gear pump machining with protective function, comprising a drive motor fixedly installed in a motor mounting base and a drill rod capable of drilling gears, and an overload protection motion mechanism, the structure of which includes a hollow rotating shaft that can rotate with the rotor of the drive motor and has a hollow internal structure, a lower movable disk that rotates with the hollow rotating shaft and can move longitudinally, a drive turntable that rotates with the lower movable disk and can drive the lower movable disk to move longitudinally, a driven turntable that rotates with the drive turntable and drives the drill rod to rotate, a wedge-shaped protrusion that enables the driven turntable to rotate with the drive turntable, and a piston plate that can change the downward pressure on the drive turntable under liquid pressure; and a sleeve-type protective mechanism, the structure of which includes a movable protective plate fixedly installed on the periphery of the hollow rotating shaft and protecting the area directly above the drill rod, a protective sleeve sleeved on the periphery of the movable protective plate and protecting the periphery of the drill rod, and a cutting fluid discharge channel for discharging cutting fluid around the drill rod.

[0007] Preferably, the overload protection mechanism further includes a raised shaft structure integrally disposed at the center of the top of the hollow shaft. The top of the raised shaft structure is provided with a rotor coupling integrally disposed with it and fixedly connected to the rotor of the drive motor. The interior of the top shaft of the hollow shaft is provided with a first longitudinal movable cavity. The top of the raised shaft structure is provided with a liquid flow-limiting cavity communicating with the first longitudinal movable cavity. The side of the raised shaft structure is provided with a first liquid hole communicating with the external space and the liquid flow-limiting cavity. The bottom center of the first longitudinal movable cavity is provided with a downward-facing first shaft through hole. The bottom end of the first shaft through hole is provided with a second longitudinal movable cavity. The bottom center of the second longitudinal movable cavity is provided with a second longitudinal shaft through hole. The bottom end of the second shaft through hole is provided with a third longitudinal movable cavity. The bottom center of the hollow shaft is provided with a first shaft mounting hole communicating with the space below it and the bottom end of the third longitudinal movable cavity.

[0008] Preferably, a rotatable third linkage shaft is mounted in the mounting hole of the first shaft body via a bearing. The bottom end of the third linkage shaft is provided with a first connecting plate fixedly connected to the drill pipe. The top end of the third linkage shaft is fixedly mounted with a driven turntable located inside the third longitudinal movable cavity. The upper surface of the driven turntable is provided with multiple wedge-shaped slots arranged in a ring array. A piston plate capable of moving along its axial direction is placed in the first longitudinal movable cavity. The bottom end of the piston plate is fixedly mounted with a first linkage shaft passing through a through hole in the first shaft body. An upper movable plate located inside the second longitudinal movable cavity is fixedly installed at the bottom end of the linkage shaft. A lower movable plate that can move axially along the second longitudinal movable cavity is located directly below the upper movable plate. A compressed helical spring is placed between the upper and lower movable plates. A second linkage shaft that passes through the second shaft body through a hole is fixedly installed at the bottom of the lower movable plate. A drive turntable located inside the third longitudinal movable cavity is fixedly installed at the bottom end of the second linkage shaft. The bottom surface of the drive turntable is provided with multiple wedge-shaped protrusions arranged in a ring array.

[0009] Preferably, the wedge-shaped protrusion and the wedge-shaped groove are adapted to each other, and when the wedge-shaped protrusion and the wedge-shaped groove reciprocate and overlap and misalign, the turntable is driven to generate a cyclic reciprocating longitudinal reciprocating motion.

[0010] Preferably, the cross-sectional shape of the second longitudinal movable cavity, the cross-sectional shape of the upper movable disk, and the cross-sectional shape of the lower movable disk are matched, all being polygonal structures, and the structural dimensions of the three cross-sections are mutually compatible.

[0011] Preferably, the sleeve-type protective mechanism further includes a protective chamber disposed inside the protective sleeve and having an open bottom. The top of the protective sleeve is provided with a shaft movement port that can slide along the hollow rotating shaft. A downward-sloping cutting fluid discharge channel is provided in the middle of one side of the protective sleeve. The cutting fluid discharge channel has a cutting fluid discharge hole with open ends inside. A second connecting plate is provided at one end of the cutting fluid discharge channel. The movable protective plate can move longitudinally along the upper half of the protective chamber. A shaft fixing sleeve integrally formed with the movable protective plate is provided on the inner circumference of the movable protective plate. A fixing sleeve hole for fixed installation at the hollow rotating shaft is provided at the center of the shaft fixing sleeve.

[0012] Preferably, the centerline of the cutting fluid discharge hole points to the longitudinal centerline of the protective sleeve.

[0013] Preferably, it also includes a kinetic energy control mechanism, the structure of which includes a hollow disc fixedly installed on the periphery of the raised shaft structure and having a hollow interior, a liquid injection pipe located on one side of the hollow disc for injecting liquid into the first liquid hole, and a movable valve plate placed inside the hollow disc and capable of controlling the pressure required for liquid discharge.

[0014] Preferably, the kinetic energy control mechanism further includes a second shaft mounting hole located at the center of the hollow disc and fixedly installed outside the raised shaft structure. The hollow disc has an annular liquid storage cavity connected to a first liquid hole in the outer periphery of the central area of ​​the second shaft mounting hole. A liquid injection pipe integrally formed with the hollow disc is provided on one side of the hollow disc. The liquid injection pipe has a liquid injection hole connecting to the annular liquid storage cavity inside. A liquid valve is installed at the port of the liquid injection hole. A horizontal hollow column integrally formed with the hollow disc is provided on the other side of the hollow disc. A horizontal movable cavity is provided inside the horizontal hollow column. One end of the horizontal movable cavity is connected to the annular liquid storage cavity through the No. 2 liquid hole. The other end of the horizontal movable cavity is provided with the No. 3 liquid hole, which connects to the external space. The interior of the horizontal movable cavity is equipped with a movable valve plate that can move along its axial direction. The circumferential side of the movable valve plate is provided with multiple concave liquid flow grooves. A sealing gasket is embedded in the end of the movable valve plate facing the No. 2 liquid hole. A No. 2 annular permanent magnet is embedded in the end face of the movable valve plate around the sealing gasket. A No. 1 annular permanent magnet is embedded in the corresponding end of the horizontal movable cavity. The No. 1 and No. 2 annular permanent magnets have opposite magnetic poles at their opposite ends, and the two form the required attraction strength between them.

[0015] Preferably, the center of mass of the kinetic energy control mechanism is located on the longitudinal center line of the hollow disc of the set.

[0016] Compared with the prior art, the present invention provides a drilling device for gear pump machining with protective function, which has the following beneficial effects: 1. It can protect the metal shavings generated by the drill rod while ensuring cooling during processing. In addition, the device can provide necessary protective measures for the drill rod during axial feed and torsion, effectively reducing the phenomenon of drill rod breakage due to large axial feed stroke and torque overload, and further improving the safety protection level during the processing.

[0017] 2. Equipped with an overload protection mechanism, the drill pipe is fed by a hollow rotating shaft as the main load-bearing structure, along with polygonal matching upper and lower movable discs, a compression helical spring, a drive turntable, and a driven turntable with a wedge-shaped groove. The rotation of the drill pipe is achieved through the meshing of the wedge-shaped protrusion and the wedge-shaped groove. Under normal drilling conditions, the wedge-shaped protrusion engages with the wedge-shaped groove to synchronously transmit torque, driving the drill pipe to complete gear pump drilling. If workpiece jamming or excessive feed occurs, and the feed pressure or torsional resistance exceeds the preset clamping force of the helical spring, the wedge-shaped protrusion will automatically disengage from the wedge-shaped groove, interrupting torque transmission. Simultaneously, the drive turntable rises with the lower movable disc, significantly reducing the axial pressure and torsional load on the drill pipe. This provides buffer protection from both torque overload and axial feed overload perspectives, reducing the risk of drill pipe bending and breakage at the source, and improving drill bit lifespan and processing safety.

[0018] 3. Equipped with a sleeve-type protective mechanism, consisting of a sliding protective sleeve, a movable protective plate fixed to the outside of the hollow rotating shaft, and an obliquely arranged cutting fluid discharge channel. The protective sleeve has a protective chamber with an open bottom. The movable protective plate can slide longitudinally along the inner wall of the protective chamber. The two work together to form an adaptive and expandable fully enclosed protective space. During drilling, high-speed flying metal chips are completely blocked inside the protective chamber, preventing iron chips from flying out and scratching the operator. The center line of the discharge hole of the cutting fluid discharge channel on one side of the mechanism is aligned with the center of the drill rod. After connecting an external fluid supply pump, cutting fluid can be continuously and precisely sprayed onto the drilling point. While achieving chip isolation and protection, it can also quickly remove the high temperature of cutting, improving the shortcomings of traditional single protective sleeves with poor heat dissipation and easy high-temperature wear of the drill rod. It takes into account both safety protection and cooling and lubrication functions.

[0019] 4. Equipped with a kinetic energy control mechanism, integrating a hollow disc, annular liquid storage chamber, hydraulic pipelines, and a movable valve plate with double annular permanent magnets. Hydraulic oil can be injected into the annular liquid storage chamber via an external hydraulic device. The hydraulic oil flows into the first longitudinal movable chamber through the first liquid hole, pushing the piston plate down to compress the helical spring. The preload pressure of the helical spring can be precisely adjusted according to different gear pump processing conditions, and the overload protection threshold of the equipment can be flexibly set. When the axial feed stroke exceeds the buffer limit of the helical spring or the hydraulic pressure exceeds the attraction between the first and second annular permanent magnets, the hydraulic system will push open the movable valve plate with a sealing gasket. The oil will quickly release pressure outward through the liquid flow channel, offsetting the excessive axial feed impact force. This forms a two-stage overload protection with the overload protection mechanism, doubly preventing the drill rod from breaking under excessive feed load. Furthermore, the overall center of gravity of the mechanism is located on the center line of the hollow disc, so there will be no eccentric vibration during high-speed rotation, resulting in stronger operational stability. Attached Figure Description

[0020] Figure 1 This is a perspective view of the present invention; Figure 2This is a three-dimensional cross-sectional view of the present invention; Figure 3 This is a perspective view of the anti-overload motion mechanism in this invention; Figure 4 This is a three-dimensional cross-sectional view of the anti-overload motion mechanism in this invention; Figure 5 This is a perspective view of the sleeve-type protective mechanism in this invention; Figure 6 This is a three-dimensional cross-sectional view of the sleeve-type protective mechanism in this invention; Figure 7 This is a perspective view of the kinetic energy control mechanism in this invention; Figure 8 This is a three-dimensional cross-sectional view of the kinetic energy control mechanism in this invention.

[0021] The components include: 1. Drive motor; 2. Motor mounting base; 3. Drill rod; 4. Overload protection mechanism; 41. Hollow rotating shaft; 42. Raised shaft structure; 43. Rotor coupling; 44. No. 1 longitudinal movable cavity; 45. Liquid flow limiting cavity; 46. No. 1 liquid hole; 47. No. 1 shaft through hole; 48. No. 2 longitudinal movable cavity; 49. No. 2 shaft through hole; 410. No. 1 shaft mounting hole; 411. Piston plate; 412. No. 1 linkage shaft; 413. Upper movable plate; 414. Lower movable plate; 415. Helical spring; 416. No. 2 linkage shaft; 417. Drive turntable; 418. Wedge-shaped groove; 419. Wedge-shaped protrusion; 420. Driven turntable; 421. No. 3 linkage shaft; 422. No. 1 connecting plate; 423. No. 3 5. Longitudinal movable cavity; 6. Sleeve-type protective mechanism; 7. Protective sleeve; 8. Protective chamber; 9. Shaft movement port; 10. Cutting fluid discharge channel; 11. Cutting fluid discharge hole; 12. Shaft fixing sleeve; 13. Fixing sleeve hole; 24. Movable protective plate; 35. No. 2 connecting plate; 46. Kinetic energy control mechanism; 57. Hollow disc; 68. No. 2 shaft mounting hole; 79. Annular liquid storage cavity; 80. Liquid injection pipe; 91. Liquid injection hole; 10. Liquid valve; 11. Horizontal hollow column; 12. No. 2 liquid hole; 13. Horizontal movable cavity; 14. No. 1 annular permanent magnet; 15. No. 2 annular permanent magnet. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see Figure 1 and Figure 2 A drilling device for processing gear pumps with protective functions includes a drive motor 1 fixedly installed in a motor mounting base 2 and a drill rod 3 capable of drilling gears. Before operation, the motor mounting base 2 needs to be fixedly connected to the moving end of the axial feed device, and then the gear pump to be drilled is fixedly installed directly below the drill rod 3 by a clamping device, thus completing the preparation work before operation.

[0024] To achieve the desired linkage effect and reduce drill pipe wear caused by large axial feed stroke and torque overload, please refer to [link to relevant documentation]. Figure 1 , Figure 2 , Figure 3 and Figure 4 An overload protection mechanism 4 needs to be installed. Its structure includes a hollow rotating shaft 41 that rotates with the rotor of the drive motor 1 and has a hollow internal structure; a lower movable disk 414 that rotates with the hollow rotating shaft 41 and can move longitudinally; a drive rotating disk 417 that rotates with the lower movable disk 414 and can drive the lower movable disk 414 to move longitudinally; a driven rotating disk 420 that rotates with the drive rotating disk 417 and drives the drill rod 3 to rotate; a wedge-shaped protrusion 419 that allows the driven rotating disk 420 to rotate with the drive rotating disk 417; and a mechanism that can change under liquid pressure. The piston plate 411, which applies downward pressure to the drive turntable 417, starts the drive motor 1. Its rotor drives the hollow shaft 41 to rotate in a specific direction. The hollow shaft 41 then drives the upper movable disk 413 and the lower movable disk 414 to rotate rapidly. The lower movable disk 414 then drives the drive turntable 417 to rotate. With the cooperation of the wedge-shaped protrusion 419 and the wedge-shaped slot 418, the driven turntable 420 drives the drill rod 3 to rotate in a specific direction. Through the axial feed device, the device moves downward. When the rotating drill rod 3 encounters the gear pump, it will drill a hole in the gear pump.

[0025] During drilling, when the feed pressure or torsional resistance is greater than the downward pressure exerted by the helical spring 415 on the drive turntable 417, the wedge-shaped protrusion 419 will disengage from the wedge-shaped groove 418 and move upward. At the same time, the drive turntable 417 drives the lower movable disc 414 to move upward. The torque of the drill rod 3 will not continue to increase during rotation, thereby achieving a linkage effect and reducing the phenomenon of drill rod breakage due to large axial feed stroke and torque overload.

[0026] For details regarding the structure of the overload protection motion mechanism 4, please refer to [link / reference]. Figure 3 and Figure 4It also includes a raised shaft structure 42 integrally disposed at the top center of the hollow rotating shaft 41. The top of the raised shaft structure 42 is provided with a rotor coupling 43 integrally disposed with it and fixedly connected to the rotor of the drive motor 1. A first longitudinal movable cavity 44 is provided inside the top shaft of the hollow rotating shaft 41. A liquid flow-limiting cavity 45 communicating with the first longitudinal movable cavity 44 is provided at the top of the raised shaft structure 42. A first liquid hole 46 communicating with the external space and the liquid flow-limiting cavity 45 is provided on the side of the raised shaft structure 42. A downward-facing first shaft through hole 47 is provided at the bottom center of the first longitudinal movable cavity 44. A second longitudinal movable cavity 4 is provided at the bottom end of the first shaft through hole 47. 8. A longitudinal second shaft through hole 49 is provided at the center of the bottom end of the second longitudinal movable cavity 48. A longitudinal third longitudinal movable cavity 423 is provided at the bottom end of the second shaft through hole 49. A first shaft mounting hole 410 is provided at the center of the bottom end of the hollow rotating shaft 41, connecting the space below it and the bottom end of the third longitudinal movable cavity 423. A rotatable third linkage shaft 421 is installed in the first shaft mounting hole 410 through a bearing. A first connecting plate 422 fixedly connected to the drill rod 3 is provided at the bottom end of the third linkage shaft 421. A driven turntable 420 located inside the third longitudinal movable cavity 423 is fixedly installed at the top end of the third linkage shaft 421. The upper surface of the driven turntable 420... Multiple wedge-shaped slots 418 arranged in a ring array are provided. A piston plate 411 capable of moving along its axial direction is placed in the first longitudinal movable cavity 44. A first linkage shaft 412 passing through the first shaft body through hole 47 is fixedly installed at the bottom end of the piston plate 411. An upper movable disk 413 located inside the second longitudinal movable cavity 48 is fixedly installed at the bottom end of the first linkage shaft 412. A lower movable disk 414 capable of moving along the axial direction of the second longitudinal movable cavity 48 is arranged directly below the upper movable disk 413. A compressed helical spring 415 is placed between the upper movable disk 413 and the lower movable disk 414. A second through hole 49 passing through the second shaft body is fixedly installed at the bottom of the lower movable disk 414. The bottom end of the second linkage shaft 416 is fixedly installed with a drive turntable 417 located inside the third longitudinal movable cavity 423. The bottom surface of the drive turntable 417 is provided with multiple wedge-shaped protrusions 419 arranged in a ring array. The wedge-shaped protrusions 419 and the wedge-shaped slots 418 are adapted to each other. When the wedge-shaped protrusions 419 and the wedge-shaped slots 418 reciprocate and overlap and misalign, the drive turntable 417 generates a cyclic reciprocating longitudinal reciprocating motion. The cross-sectional shape of the second longitudinal movable cavity 48, the cross-sectional shape of the upper movable disk 413 and the cross-sectional shape of the lower movable disk 414 are matched and are all polygonal structures. The cross-sectional dimensions of the three are adapted to each other.

[0027] To protect against metal shavings generated by the drill pipe while ensuring proper cooling during processing, please refer to [link to relevant documentation]. Figure 1 , Figure 2 , Figure 5 and Figure 6 A sleeve-type protective mechanism 5 needs to be installed. Its structure includes a movable protective plate 58 fixedly installed on the outer periphery of the hollow rotating shaft 41 to protect the area directly above the drill rod 3, a protective sleeve 51 sleeved on the outer periphery of the movable protective plate 58 to protect the outer periphery of the drill rod 3, and a cutting fluid discharge channel 54 for discharging cutting fluid around the drill rod 3. The second connecting plate 59 is connected to the discharge port of a liquid pump that provides cutting fluid. During the drilling process, the protective sleeve 51 can effectively protect the splashed metal chips within a certain range, blocking them inside the protective chamber 52. At the same time, the downward movement of the drill rod 3 and the hollow rotating shaft 41 allows the movable protective plate 58 to move inside the protective chamber 52, thereby achieving full-range protection against splashed metal chips. During the drilling process, the liquid pump can discharge cutting fluid toward the drill rod 3 to achieve effective cooling of the drilling area.

[0028] For details regarding the specific structure of the sleeve-type protective mechanism 5, please refer to [link / reference]. Figure 5 and Figure 6 It also includes a protective chamber 52 located inside the protective sleeve 51 with an open bottom. The top of the protective sleeve 51 is provided with a shaft movement port 53 that can slide along the hollow rotating shaft 41. A downward-sloping cutting fluid discharge channel 54 is provided in the middle of one side of the protective sleeve 51. The cutting fluid discharge channel 54 is provided with a cutting fluid discharge hole 55 with open ends inside. A second connecting plate 59 is provided at one end of the cutting fluid discharge channel 54. The movable protective plate 58 can move longitudinally along the upper half of the protective chamber 52. A shaft fixing sleeve 56 integrally formed with the movable protective plate 58 is provided on the inner circumference of the movable protective plate 58. A fixing sleeve hole 57 fixedly installed at the shaft of the hollow rotating shaft 41 is provided at the center of the shaft fixing sleeve 56. The center line of the cutting fluid discharge hole 55 points to the longitudinal center line of the protective sleeve 51.

[0029] To achieve effective control of the rated pressure, please refer to [link / reference]. Figure 1 , Figure 2 , Figure 7 and Figure 8A kinetic energy control mechanism 6 needs to be set up. Its structure includes a hollow disc 61 fixedly installed on the periphery of the raised shaft structure 42 and having a hollow internal structure, a liquid injection pipe 64 located on one side of the hollow disc 61 for injecting liquid into the first liquid hole 46, and a movable valve plate 611 placed inside the hollow disc 61 and capable of controlling the pressure required for liquid discharge. Liquid is injected into the liquid valve 66 through a hydraulic device. The liquid will be injected into the first longitudinal movable cavity 44 through the annular liquid storage cavity 63, the first liquid hole 46 and the liquid flow limiting cavity 45. The liquid will exert downward pressure on the helical spring 415 through the piston plate 411 and the upper movable disc 413. When the pressure generated by the amount of liquid reaches the rated strength, the helical spring 415 will transmit the rated strength to the drive turntable 417, thereby providing the rated downward pressure strength.

[0030] When the axial supply stroke of the equipment is overloaded and the stroke range exceeds the compressible stroke range of the helical spring 415, the movement of the axial supply stroke will cause the pressure of the liquid to react on the surface of the sealing gasket 613. When the pressure formed by the liquid is greater than the attraction between the first annular permanent magnet 614 and the second annular permanent magnet 615, the attraction between the first annular permanent magnet 614 and the second annular permanent magnet 615 will decrease instantly, and the movable valve plate 611 will move quickly. The liquid will be discharged outward along the movement gap of the movable valve plate 611 and the liquid flow groove 612, and the axial supply will not cause the drill rod 3 to break.

[0031] For details regarding the specific structure of the kinetic energy control mechanism 6, please refer to [link / reference]. Figure 7 and Figure 8It also includes a second shaft mounting hole 62 located at the center of the hollow disc 61 and fixedly installed on the outside of the raised shaft structure 42. The hollow disc 61 has an annular liquid storage cavity 63 connected to a first liquid hole 46 on the periphery of the central area of ​​the second shaft mounting hole 62. A liquid injection pipe 64 integrally formed with the hollow disc 61 is provided on one side of the hollow disc 61. A liquid injection hole 65 connecting to the annular liquid storage cavity 63 is provided inside the liquid injection pipe 64. A liquid valve 66 is installed at the port of the liquid injection hole 65. A horizontal hollow column 67 integrally formed with the hollow disc 61 is provided on the other side of the hollow disc 61. A horizontal movable cavity 69 is provided inside the horizontal hollow column 67. One end of the horizontal movable cavity 69 is connected to the annular liquid storage cavity 63 through a second liquid hole 68. The water... The other end of the horizontal movable cavity 69 is provided with a third liquid hole 610 that connects to the external space. Inside the horizontal movable cavity 69, a movable valve plate 611 that can move along its axial direction is placed. The circumferential side of the movable valve plate 611 is provided with a plurality of concave liquid flow grooves 612. A sealing gasket 613 is embedded in the end of the movable valve plate 611 facing the second liquid hole 68. A second annular permanent magnet 615 is embedded in the end face of the movable valve plate 611 around the sealing gasket 613. A first annular permanent magnet 614 is embedded in the corresponding end of the horizontal movable cavity 69. The first annular permanent magnet 614 and the second annular permanent magnet 615 have opposite magnetic poles at their opposite ends and form the required attraction strength between them. The center of mass of the kinetic energy control mechanism 6 is located on the longitudinal center line of the hollow disc 61.

[0032] In use, the motor mounting base 2 is fixedly connected to the moving end of the axial feed device, and then the gear pump to be drilled is fixedly installed directly below the drill rod 3 through the clamping device. At the same time, liquid is injected into the liquid valve 66 through the hydraulic device. The liquid will be injected into the first longitudinal moving chamber 44 through the annular liquid storage chamber 63, the first liquid hole 46 and the liquid flow limiting chamber 45. The liquid will exert downward pressure on the helical spring 415 through the piston plate 411 and the upper moving plate 413. When the pressure generated by the amount of liquid reaches the rated strength, the helical spring 415 will transmit the rated strength to the drive turntable 417, thereby providing the rated downward pressure strength. When the drive motor 1 is started, its rotor drives the hollow shaft 41 to rotate in a specific direction. The hollow shaft 41 then drives the upper movable disk 413 and the lower movable disk 414 to rotate rapidly. The lower movable disk 414 then drives the drive turntable 417 to rotate. With the cooperation of the wedge-shaped protrusion 419 and the wedge-shaped slot 418, the driven turntable 420 drives the drill rod 3 to rotate in a specific direction. Through the axial feed device, the device moves downward. When the rotating drill rod 3 encounters the gear pump, it will drill a hole in the gear pump. Connect the second connecting plate 59 to the drain port of a liquid pump that provides cutting fluid. During the drilling process, the protective sleeve 51 can effectively protect the splashed metal chips by blocking them inside the protective chamber 52. At the same time, the downward-moving drill rod 3 and the hollow rotating shaft 41 can move the movable protective plate 58 inside the protective chamber 52, thereby achieving full-range protection against splashed metal chips. During the drilling process, the liquid pump can discharge the cutting fluid toward the drill rod 3 to achieve effective cooling of the drilling part. During drilling, when the feed pressure or torsional resistance exceeds the downward pressure exerted by the helical spring 415 on the drive turntable 417, the wedge-shaped protrusion 419 will disengage from the wedge-shaped groove 418 and move upward. At the same time, the drive turntable 417 drives the lower movable disc 414 to move upward. The torque of the drill rod 3 will not continue to increase during rotation. When the axial supply stroke of the equipment is overloaded and the stroke range exceeds the compressible stroke range of the helical spring 415, the movement of the axial supply stroke will cause the pressure of the liquid to react on the surface of the sealing gasket 613. When the pressure formed by the liquid is greater than the attraction between the first annular permanent magnet 614 and the second annular permanent magnet 615, the attraction between the first annular permanent magnet 614 and the second annular permanent magnet 615 will decrease instantaneously. The movable valve plate 611 will then move rapidly, and the liquid will be discharged outward along the movement gap of the movable valve plate 611 and the liquid flow groove 612. The axial supply will not cause the drill rod 3 to break.

[0033] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A drilling device for processing gear pumps with protective functions, comprising a drive motor (1) fixedly installed in a motor mounting base (2) and a drill rod (3) capable of drilling gears, characterized in that: It also includes, The overload protection motion mechanism (4) includes a hollow rotating shaft (41) that can rotate with the rotor of the drive motor (1) and has a hollow internal structure, a lower movable disk (414) that rotates with the hollow rotating shaft (41) and can move longitudinally, a drive turntable (417) that rotates with the lower movable disk (414) and can drive the lower movable disk (414) to move longitudinally, a driven turntable (420) that can rotate with the drive turntable (417) and drive the drill rod (3) to rotate, a wedge-shaped protrusion (419) that can make the driven turntable (420) rotate with the drive turntable (417), and a piston plate (411) that can change the downward pressure on the drive turntable (417) under liquid pressure. And a sleeve-type protective mechanism (5), the structure of which includes a movable protective plate (58) fixedly installed on the outer periphery of the hollow rotating shaft (41) and protecting the area directly above the drill rod (3), a protective sleeve (51) sleeved on the outer periphery of the movable protective plate (58) and capable of protecting the outer periphery of the drill rod (3), and a cutting fluid discharge channel (54) for discharging cutting fluid around the drill rod (3).

2. The drilling device for machining a gear pump with protective function according to claim 1, characterized in that: The overload protection mechanism (4) further includes a raised shaft structure (42) integrally disposed at the top center of the hollow rotating shaft (41). The top of the raised shaft structure (42) is provided with a rotor coupling (43) integrally disposed with it and fixedly connected to the rotor of the drive motor (1). The interior of the top shaft of the hollow rotating shaft (41) is provided with a first longitudinal movable cavity (44). The top of the raised shaft structure (42) is provided with a liquid flow limiting cavity (45) communicating with the first longitudinal movable cavity (44). The side of the raised shaft structure (42) is provided with a space communicating with the outside space and the liquid flow limiting cavity (45). The first liquid hole (46) is provided with a downward first shaft through hole (47) at the bottom center of the first longitudinal movable cavity (44). The first shaft through hole (47) is provided with a longitudinal second longitudinal movable cavity (48) at the bottom center of the second longitudinal movable cavity (48). The second shaft through hole (49) is provided with a longitudinal second shaft through hole (49) at the bottom center of the second shaft through hole (49). The third longitudinal movable cavity (423) is provided with a longitudinal third shaft movable cavity (423) at the bottom center of the hollow rotating shaft (41). The first shaft mounting hole (410) is provided at the bottom center of the hollow rotating shaft (41) to connect the space below it and the bottom of the third longitudinal movable cavity (423).

3. The drilling device for machining a gear pump with protective function according to claim 2, characterized in that: A rotatable third linkage shaft (421) is installed in the first shaft mounting hole (410) via a bearing. The bottom end of the third linkage shaft (421) is provided with a first connecting plate (422) fixedly connected to the drill rod (3). The top end of the third linkage shaft (421) is fixedly installed with a driven turntable (420) located inside the third longitudinal movable cavity (423). The upper surface of the driven turntable (420) is provided with multiple wedge-shaped slots (418) arranged in a ring array. A piston plate (411) capable of moving along its axial direction is placed in the first longitudinal movable cavity (44). The bottom end of the piston plate (411) is fixedly installed with a first linkage shaft (412) that passes through the first shaft through hole (47). An upper movable disk (413) located inside the second longitudinal movable cavity (48) is fixedly installed at the bottom end. A lower movable disk (414) that can move along the axial direction of the second longitudinal movable cavity (48) is arranged directly below the upper movable disk (413). A coil spring (415) in a compressed state is placed between the upper movable disk (413) and the lower movable disk (414). A second linkage shaft (416) that passes through the second shaft body through hole (49) is fixedly installed at the bottom of the lower movable disk (414). A drive turntable (417) located inside the third longitudinal movable cavity (423) is fixedly installed at the bottom end of the second linkage shaft (416). A plurality of wedge-shaped protrusions (419) arranged in a ring array are arranged on the bottom surface of the drive turntable (417).

4. The drilling device for machining a gear pump with protective function according to claim 3, characterized in that: The wedge-shaped protrusion (419) and the wedge-shaped groove (418) are adapted to each other, and when the wedge-shaped protrusion (419) and the wedge-shaped groove (418) overlap and misalign during the reciprocating motion, the drive turntable (417) generates a cyclic reciprocating longitudinal reciprocating motion.

5. A drilling device for machining a gear pump with protective function according to claim 4, characterized in that: The cross-sectional shape of the second longitudinal movable cavity (48), the cross-sectional shape of the upper movable disk (413), and the cross-sectional shape of the lower movable disk (414) are all polygonal structures, and the cross-sectional dimensions of the three are mutually compatible.

6. A drilling device for machining a gear pump with protective function according to claim 5, characterized in that: The insertable protective mechanism (5) further includes a protective chamber (52) located inside the protective sleeve (51) and having an open bottom. The top of the protective sleeve (51) is provided with a shaft movement port (53) that can slide along the hollow rotating shaft (41). A downward-sloping cutting fluid discharge channel (54) is provided in the middle of one side of the protective sleeve (51). The cutting fluid discharge channel (54) has a cutting fluid discharge hole (55) with open ends inside. A second connecting plate (59) is provided at one end of the cutting fluid discharge channel (54). The movable protective plate (58) can move longitudinally along the upper half of the protective chamber (52). The inner circumference of the movable protective plate (58) is provided with a shaft fixing sleeve (56) that is integral with it. The center of the shaft fixing sleeve (56) is provided with a fixing sleeve hole (57) that is fixedly installed on the shaft of the hollow rotating shaft (41).

7. A drilling device for machining a gear pump with protective function according to claim 6, characterized in that: The centerline of the cutting fluid discharge hole (55) points to the longitudinal centerline of the protective sleeve (51).

8. A drilling device for machining a gear pump with protective function according to claim 7, characterized in that: It also includes a kinetic energy control mechanism (6), the structure of which includes a hollow disc (61) fixedly installed on the periphery of the raised shaft structure (42) and having a hollow interior, a liquid injection pipe (64) located on one side of the hollow disc (61) and used to inject liquid into the first liquid hole (46), and a movable valve plate (611) placed inside the hollow disc (61) and capable of controlling the pressure required for liquid to be discharged outward.

9. A drilling device for machining a gear pump with protective function according to claim 8, characterized in that: The kinetic energy control mechanism (6) further includes a second shaft mounting hole (62) located at the center of the hollow disc (61) and fixedly installed on the outside of the raised shaft structure (42). The hollow disc (61) has an annular liquid storage cavity (63) connected to the first liquid hole (46) on the periphery of the middle area of ​​the second shaft mounting hole (62). A liquid injection pipe (64) integrally formed with the hollow disc (61) is provided on one side of the hollow disc (61). A liquid injection hole (65) connecting to the annular liquid storage cavity (63) is provided inside the liquid injection pipe (64). A liquid valve (66) is installed at the port of the liquid injection hole (65). A horizontal hollow column (67) integrally formed with the hollow disc (61) is provided on the other side of the hollow disc (61). A horizontal movable cavity (69) is provided inside the horizontal hollow column (67). One end of the horizontal movable cavity (69) is connected to the first liquid hole (46). The second liquid hole (68) is connected to the annular liquid storage cavity (63). The other end of the horizontal movable cavity (69) is provided with a third liquid hole (610) that connects to the external space. The interior of the horizontal movable cavity (69) is equipped with a movable valve plate (611) that can move along its axial direction. The circumferential side of the movable valve plate (611) is provided with multiple concave liquid flow grooves (612). A sealing gasket (613) is embedded in the end of the movable valve plate (611) facing the second liquid hole (68). A second annular permanent magnet (615) is embedded in the end face of the movable valve plate (611) around the sealing gasket (613). A first annular permanent magnet (614) is embedded in the corresponding end of the horizontal movable cavity (69). The first annular permanent magnet (614) and the second annular permanent magnet (615) have opposite magnetic poles at their opposite ends and form the required attraction strength between them.

10. A drilling device for machining a gear pump with protective function according to claim 9, characterized in that: The center of mass of the kinetic energy control mechanism (6) is located on the longitudinal center line of the hollow disc (61) of the set.

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