Crankcase multi-angle rapid drilling device

Abstract

The invention discloses a crankcase multi-angle rapid drilling device, and relates to the technical field of crankcase drilling devices.The crankcase multi-angle rapid drilling device comprises a workbench, and a driving hinge base is fixedly installed on the upper wall of the workbench; a positioning table is fixedly installed at the driving end of the driving hinge base, four evenly-distributed guide rods are fixedly installed on the upper wall of the positioning table, and limiting blocks are detachably connected to the top ends of the guide rods. A positioning frame is connected to the guide rod in a sliding manner; a transmission motor is fixedly mounted on the upper wall of the positioning frame, a transmission lead screw is fixedly connected to the driving end of the transmission motor, and a drilling assembly is screwed on the transmission lead screw; the problem that the drilling angle is fixed and cannot adapt to multi-angle machining is solved through the matching mode that the adjusting motor drives the driving gear to be meshed with the driven gear and drives the hinge base to drive the positioning table and the drilling assembly to rotate integrally.

Description

Technical Field

[0001] This invention relates to the field of crankcase drilling device technology, specifically a crankcase multi-angle rapid drilling device. Background Technology

[0002] The crankcase rapid drilling device is a special tooling for crankcase machining. It adopts a precision positioning fixture and a multi-axis drilling structure, which can complete the machining of multiple holes in one go. The device comes with a quick clamping and guiding mechanism to ensure hole position accuracy and coaxiality, reduce clamping and tool changing time, and improve drilling efficiency. It has a stable structure, is easy to operate, and is suitable for mass production. It is a key piece of equipment for efficient machining of crankcase hole systems. For example, the invention patent with announcement number CN218555677U discloses a drilling device suitable for the cylinder bore of a compressor crankcase, including a base, a worktable fixedly connected to the top of the base, a sleeve fixedly connected to one side of the top of the worktable, a first electric telescopic rod fixedly connected inside the sleeve, a vertical rod fixedly connected to the top of the first electric telescopic rod, and a horizontal plate fixedly connected to one side of the top of the vertical rod. By setting a transmission motor, a drive gear can be driven to rotate. The drive gear meshes with a rack, allowing the slide to move in the Y-axis direction, thereby causing the drill bit to move synchronously. By setting a third electric telescopic rod, the drilling platform can be driven to move in the X-axis direction. In cooperation with the transmission motor, the drill bit can perform drilling operations at various positions in the crankcase. However, this drilling device has the following shortcomings: The drilling angle is fixed, and it can only complete vertical drilling in a plane. It cannot adapt to the multi-angle machining needs such as crankcase inclined holes and side shoulder holes, and has poor adaptability. Without a precise depth limiting structure, the hole depth consistency is poor during batch processing, which cannot guarantee the machining accuracy of the crankcase hole system. When machining deep holes, since the drilling part cannot be seen, operators usually cut an extra three to five millimeters of hole diameter depth to ensure the hole diameter depth. This requires a high level of operator experience and causes unnecessary additional wear on the cutting tools. Machining multi-directional holes in crankcases requires repeated adjustments to the workpiece clamping position, which is cumbersome and results in low efficiency for mass production. When drilling, the single set of guide structure is used for limiting the position, without a two-way buffer and shock absorption structure. This results in large drilling vibrations, which can easily lead to drill bit deviation and poor hole wall quality. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a multi-angle rapid drilling device for crankcases. This solves the problems of existing devices having fixed drilling angles, only capable of vertical planar drilling, and unable to adapt to the multi-angle machining requirements of crankcases such as oblique holes and side shoulder holes, resulting in poor adaptability; lacking a precise depth-limiting structure, leading to poor hole depth consistency during batch processing and failing to guarantee the machining accuracy of crankcase hole systems; requiring repeated adjustments to the workpiece clamping position for multi-directional crankcase hole machining, resulting in cumbersome operation and low batch production efficiency; and relying solely on a single set of guide structures for limiting drilling without a bidirectional buffer and shock absorption structure, leading to significant drilling vibration and easily causing drill bit deviation and poor hole wall quality.

[0004] To achieve the above objectives, the present invention provides the following technical solution: A crankcase multi-angle rapid drilling device, characterized in that it comprises: A workbench has a drive hinge base fixedly installed on its upper wall; a positioning platform is fixedly installed on the drive end of the drive hinge base; four evenly distributed guide rods are fixedly installed on the upper wall of the positioning platform; a limit block is detachably connected to the top of each guide rod; a positioning frame is slidably connected to each guide rod; a drive motor is fixedly installed on the upper wall of the positioning frame; a drive screw is fixedly connected to the drive end of the drive motor; and a drilling assembly is screwed onto the drive screw. The vertical wall is fixedly installed on the upper wall of the positioning frame and is rotatably connected to the drive end of the transmission motor; two optical rods and a support arm are fixedly installed on the side wall of the vertical wall away from the transmission motor, and the two optical rods and the support arm are symmetrically distributed along both sides of the transmission screw. A drive block is fixedly installed at the end of the support arm away from the vertical wall, and handles are fixedly installed on both its left and right side walls; a lead screw adapter sleeve is fixedly installed on the side wall of the drive block facing the vertical wall, and the lead screw adapter sleeve is adapted to the rotation of the transmission lead screw. An adjustable motor is fixedly installed on the upper wall of the workbench, and a drive gear is fixedly installed on its drive end; a driven gear is fixedly installed on the hinge end of the drive hinge base on the side away from the vertical wall, and the driven gear meshes with the drive gear. A positioning screw is fixedly installed at the center of the upper wall of the positioning platform, and a stepped positioning block is screwed onto its outer wall; the lower wall of the stepped end of the stepped positioning block has several evenly distributed insertion positioning holes, and a flange is fitted on its outer wall surface; several limiting rods are fixedly installed on the upper wall of the flange, and the limiting rods correspond one-to-one with the insertion positioning holes and are inserted and adapted; several evenly distributed spring telescopic rods are fixedly installed on the lower wall of the flange. A crankcase clamp is detachably mounted on the upper wall of the worktable, and the crankcase body is clamped on the crankcase clamp.

[0005] Preferably, the drilling assembly includes: a transmission box, in which a driving bevel gear is rotatably connected at the top center, and two driven bevel gears are rotatably connected to the bottom wall of the transmission box, the two driven bevel gears being symmetrically distributed along the driving bevel gear and both meshing with the driving bevel gear; The drive motor is fixedly mounted on the upper wall of the transmission box, and its drive end is fixedly connected to the drive bevel gear. The tool holder passes through the transmission box and is fixedly connected to the end of the driven bevel gear away from the drive motor; The drill bit is detachably connected to the tool holder via a chuck. A transmission frame is fixedly installed on the outer wall of the transmission box; a screw sleeve is fixedly installed at the center of the transmission frame, and the screw sleeve is screwed into the transmission screw; the transmission frame has two guide holes, and the guide holes correspond one-to-one with the guide rod and are slidably adapted.

[0006] Preferably, corrugated splash guards are fixedly installed between the transmission frame and the vertical wall, and between the transmission frame and the drive block.

[0007] Preferably, a limit frame is fixedly installed on the upper wall of the worktable, and the limit frame is sleeved around the adjustment motor; a top rod is fixedly installed on the side wall of the limit frame facing the drive gear, and a rotating top sleeve is fixedly installed at the end of the top rod, and the rotating top sleeve is rotatably connected to the driven gear.

[0008] Preferably, a return spring is sleeved on the outer wall of the guide rod, and the two ends of the return spring are fixedly connected to the upper wall of the positioning platform and the lower wall of the positioning frame, respectively.

[0009] Preferably, a driven hinge base is fixedly installed on the upper wall of the worktable, and the driven hinge base corresponds vertically to the driving block; an auxiliary sleeve is fixedly installed on the driving end of the driven hinge base, a top plate is slidably connected inside the auxiliary sleeve, and several auxiliary springs are fixedly installed between the top plate and the bottom wall of the auxiliary sleeve.

[0010] Preferably, the upper wall of the auxiliary sleeve has two guide holes; the lower wall of the drive block is fixedly equipped with two plug rods, which are plugged into and adapted to the guide holes; the plug-in end of the guide hole has an assembly chamfer.

[0011] Preferably, a splash guard is fixedly installed on the upper wall of the worktable, and the splash guard is located between the drive hinge base and the crankcase body; the edge of the splash guard is provided with a guide angle.

[0012] Preferably, a structural reinforcing rib is fixedly installed between the support arm and the vertical wall.

[0013] Preferably, a splash-proof corrugated cover is fixedly installed between the upper wall of the positioning platform and the lower wall of the positioning frame.

[0014] This invention provides a multi-angle rapid drilling device for crankcases, which has the following beneficial effects: By adjusting the motor to drive the drive gear and driven gear to mesh, the hinge base is driven to rotate the positioning table and drilling assembly as a whole, which solves the problem of fixed drilling angle and inability to adapt to multi-angle processing. The limiting height is adjusted by screwing the positioning screw into the stepped positioning block, and the locking mechanism of the limit rod driven by the ring to the insertion positioning hole solves the problems of no fixed depth limit and poor hole depth consistency in batch processing. By using an integrated adjustment mechanism that drives the hinged base to adjust the drilling angle, the transmission screw to adjust the horizontal position of the drill bit, and the stepped positioning block to limit the drilling depth, the problems of repeated part adjustments, cumbersome operation, and low efficiency in multi-directional processing are solved. By employing a two-way balanced mechanism—with an upward buffer provided by a return spring on the outer wall of the guide rod and a downward reverse buffer provided by an auxiliary spring inside the auxiliary sleeve—the problems of excessive drilling vibration, easy drill bit deviation, and insufficient machining accuracy are solved. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional view of the overall structure of the present invention; Figure 3 A schematic diagram of the transmission lead screw and guide screw structure, which is a schematic diagram of the overall structure of the present invention; Figure 4 This is a schematic diagram of the drive hinge base structure of the present invention; Figure 5 This is a schematic diagram of the positioning screw and stepped positioning block structure of the present invention; Figure 6 This is a schematic diagram of the drilling assembly structure of the present invention; Figure 7 This is a schematic diagram of the positioning frame, upright wall, and drive block structure of the present invention.

[0016] In the diagram: 1. Workbench; 2. Drive hinge base; 3. Positioning table; 4. Guide rod; 5. Limiting block; 6. Positioning frame; 7. Drive motor; 8. Drive screw; 9. Vertical wall; 10. Guide bar; 11. Support arm; 12. Drive block; 13. Handle; 14. Screw adapter sleeve; 15. Adjusting motor; 16. Drive gear; 17. Driven gear; 18. Positioning screw; 19. Stepped positioning block; 20. Insertion positioning hole; 21. Ring; 22. Limiting rod; 23. Spring telescopic rod; 24. Crankcase clamp; 25. Crankcase body; 26. Transmission... 27. Drive bevel gear; 28. Driven bevel gear; 29. ​​Drive motor; 30. Tool holder; 31. Drill bit; 32. Chuck; 33. Transmission frame; 34. Screw sleeve; 35. Guide hole; 36. Corrugated splash guard; 37. Limiting frame; 38. Top rod; 39. Rotating top sleeve; 40. Return spring; 41. Driven hinge base; 42. Auxiliary sleeve; 43. Top plate; 44. Auxiliary spring; 45. Guide hole; 46. Insert rod; 47. Assembly chamfer; 48. Splash guard; 49. Guide tilt angle; 50. Structural reinforcing rib; 51. Splash guard corrugated cover. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0018] Please see Figures 1-7 A crankcase multi-angle rapid drilling device, comprising: The workbench 1 has a drive hinge base 2 fixedly installed on its upper wall; a positioning table 3 is fixedly installed on the drive end of the drive hinge base 2; four evenly distributed guide rods 4 are fixedly installed on the upper wall of the positioning table 3; a limit block 5 is detachably connected to the top of the guide rods 4; a positioning frame 6 is slidably connected to the guide rods 4; a transmission motor 7 is fixedly installed on the upper wall of the positioning frame 6; a transmission screw 8 is fixedly connected to the drive end of the transmission motor 7; and a drilling assembly is screwed onto the transmission screw 8. The vertical wall 9 is fixedly installed on the upper wall of the positioning frame 6 and is rotatably connected to the drive end of the transmission motor 7; two optical rods 10 and a support arm 11 are fixedly installed on the side wall of the vertical wall 9 away from the transmission motor 7, and the two optical rods 10 and the support arm 11 are symmetrically distributed along both sides of the transmission screw 8. The drive block 12 is fixedly installed at the end of the support arm 11 away from the vertical wall 9, and handles 13 are fixedly installed on both its left and right side walls; a screw adapter sleeve 14 is fixedly installed on the side wall of the drive block 12 facing the vertical wall 9, and the screw adapter sleeve 14 is adapted to the rotation of the transmission screw 8. The adjusting motor 15 is fixedly installed on the upper wall of the workbench 1, and a drive gear 16 is fixedly installed on its drive end; a driven gear 17 is fixedly installed on the hinge end of the drive hinge base 2 on the side away from the vertical wall 9, and the driven gear 17 meshes with the drive gear 16. A positioning screw 18 is fixedly installed at the center of the upper wall of the positioning platform 3, and a stepped positioning block 19 is screwed onto its outer wall; the lower wall of the stepped end of the stepped positioning block 19 is provided with several evenly distributed insertion positioning holes 20, and a flange 21 is fitted on its outer wall surface; several limiting rods 22 are fixedly installed on the upper wall of the flange 21, and the limiting rods 22 correspond one-to-one with the insertion positioning holes 20 and are inserted and adapted; several evenly distributed spring telescopic rods 23 are fixedly installed on the lower wall of the flange 21. The crankcase clamp 24 is detachably mounted on the upper wall of the worktable 1, and the crankcase body 25 is clamped on the crankcase clamp 24.

[0019] In use, the worktable 1 provides a stable bearing and installation foundation for the entire device; the crankcase clamp 24 firmly clamps the crankcase body 25 to prevent workpiece displacement during drilling and ensure machining accuracy; the adjusting motor 15 drives the drive hinge base 2 to rotate through the meshing of the drive gear 16 and the driven gear 17, thereby driving the positioning table 3 and positioning frame 6 to rotate synchronously, realizing rapid switching of drilling angles to adapt to the machining needs of holes in different orientations of the crankcase body 25; the guide rod 4 provides precise guidance for the vertical sliding of the positioning frame 6, and the limit block 5 limits the maximum lifting stroke of the positioning frame 6 to prevent it from dislodging from the guide rod 4; the transmission motor 7 drives the transmission screw 8 to rotate, driving the drilling assembly to move axially along the transmission screw 8, realizing precise feed adjustment of the drilling position, and the screw adapter sleeve 14 provides rotational support for the end of the transmission screw 8 to ensure... The transmission is stable; the support arm 11 and the vertical wall 9 cooperate to provide stable support for the transmission screw 8 and the guide rod 10. The operator holds the handle 13 to drive the drive block 12 to move downward. At the same time, the support arm 11 drives the positioning frame 6 to move downward along the four guide rods 4 through the vertical wall 9 to realize the drilling operation of the drilling assembly. The lever ring 21 is pulled down, and several limit rods 22 disengage from the corresponding insertion positioning holes 20. Then, the stepped positioning block 19 is rotated around the positioning screw 18 to move vertically along the positioning screw 18. The height of the stepped positioning block 19 is adjusted to achieve precise limit of the drilling depth of the positioning frame 6. Then, the lever ring 21 is released, the spring telescopic rod 23 is reset, and several limit rods 22 are re-inserted into the corresponding insertion positioning holes 20 to lock the adjustment position of the stepped positioning block 19, preventing the depth limit from shifting during the drilling process and ensuring the consistency of the drilling depth of batch crankcases.

[0020] The drilling assembly includes a transmission box 26, a drive motor 29, a tool holder 30, a drill bit 31, and a transmission frame 33. A drive bevel gear 27 is rotatably connected to the top center of the transmission box 26, and two driven bevel gears 28 are rotatably connected to the bottom wall of the transmission box 26. The two driven bevel gears 28 are symmetrically distributed along the drive bevel gear 27 and both mesh with it. The drive motor 29 is fixedly mounted on the upper wall of the transmission box 26, and its drive end is fixedly connected to the drive bevel gear 27. The tool holder 30 passes through the transmission box 26 and is fixedly connected to the end of the driven bevel gear 28 away from the drive motor 29. The drill bit 31 is detachably connected to the tool holder 30 via a chuck 32. The transmission frame 33 is fixedly mounted on the outer wall of the transmission box 26. A threaded sleeve 34 is fixedly mounted at the center of the transmission frame 33, and the threaded sleeve 34 engages with the transmission lead screw 8. The transmission frame 33 has two guide holes 35, which correspond one-to-one with the guide rod 10 and are slidably fitted.

[0021] In use, the drive motor 29 drives the drive bevel gear 27 to rotate. Through the meshing of the drive bevel gear 27 with two symmetrically distributed driven bevel gears 28, the two tool holders 30 and the drill bit 31 are driven to rotate synchronously, realizing the synchronous drilling operation of the two drill bits 31, which greatly improves the processing efficiency of multi-hole positions in the crankcase. The chuck 32 realizes the detachable connection between the drill bit 31 and the tool holder 30, which facilitates the quick replacement of different specifications of drill bits 31 according to the hole diameter requirements of the crankcase, improving the versatility of the device. The transmission frame 33 is screwed with the transmission screw 8 through the screw sleeve 34, which converts the rotational motion of the transmission screw 8 into the linear feed motion of the transmission box 26. The guide hole 35 is slidably matched with the guide rod 10, which provides precise guidance for the movement of the transmission frame 33, restricts its circumferential rotation, ensures the straightness and positional accuracy of the drill bit 31 feed, and avoids drilling deviation.

[0022] Corrugated splash guards 36 are fixedly installed between the transmission frame 33 and the vertical wall 9, and between the transmission frame 33 and the drive block 12.

[0023] When in use, the corrugated splash guard 36 can adapt to the axial movement of the transmission frame 33 by expanding and contracting, without affecting the feed adjustment of the drilling assembly; at the same time, it completely covers the transmission lead screw 8 and the guide rod 10, effectively preventing the iron filings and cutting coolant splashed during the drilling process from entering the transmission thread and sliding fit clearance, preventing thread jamming, component corrosion and wear, and ensuring transmission accuracy and component service life.

[0024] A limit frame 37 is fixedly installed on the upper wall of the workbench 1. The limit frame 37 is sleeved around the adjustment motor 15. A push rod 38 is fixedly installed on the side wall of the limit frame 37 facing the drive gear 16. A rotating top sleeve 39 is fixedly installed at the end of the push rod 38. The rotating top sleeve 39 is rotatably connected to the driven gear 17.

[0025] In use, the limit bracket 37 protects the adjusting motor 15 and provides stable mounting support for the push rod 38. The push rod 38 provides end rotation support for the driven gear 17 through the rotating top sleeve 39, restricting the radial movement of the driven gear 17, ensuring the meshing accuracy between the drive gear 16 and the driven gear 17, reducing the angle adjustment deviation caused by gear movement due to the rotation clearance of the drive hinge base 2, and improving the positioning accuracy of multi-angle drilling of the crankcase.

[0026] A return spring 40 is sleeved on the outer wall of the guide rod 4, and the two ends of the return spring 40 are fixedly connected to the upper wall of the positioning platform 3 and the lower wall of the positioning frame 6, respectively.

[0027] In use, the return spring 40 provides continuous upward elastic support for the positioning frame 6. After the drilling operation is completed, it drives the positioning frame 6 to automatically lift and reset along the guide rod 4, so that the drill bit 31 can quickly disengage from the machining hole of the crankcase body 25. At the same time, when the positioning frame 6 descends to drill, it provides reverse buffer force to absorb the vibration and impact generated during the drilling process, avoid rigid collision damage to the parts, and improve the stability of the drilling process.

[0028] A driven hinge base 41 is fixedly installed on the upper wall of the workbench 1. The driven hinge base 41 corresponds vertically to the drive block 12. An auxiliary sleeve 42 is fixedly installed on the drive end of the driven hinge base 41. A top plate 43 is slidably connected inside the auxiliary sleeve 42. Several auxiliary springs 44 are fixedly installed between the top plate 43 and the bottom wall of the auxiliary sleeve 42. In use, when the positioning frame 6 slides down along the guide rod 4, the elastic force of the auxiliary spring 44 is the same as that of the return spring 40; the driven hinge base 41 and the driving hinge base 2 rotate synchronously to ensure that the auxiliary sleeve 42 always corresponds vertically with the driving block 12; when the positioning frame 6 descends to perform drilling operations, the driving block 12 presses down on the top plate 43 through the plug rod 46, and the auxiliary spring 44 is compressed. Its elastic force, which is the same as that of the return spring 40, forms a bidirectional balanced buffer, effectively offsetting the axial impact force during drilling, preventing the positioning frame 6 from shaking or vibrating, further improving the stability of the drill bit 31 feed, and ensuring the hole wall quality and positional accuracy of the crankcase drilling.

[0029] The upper wall of the auxiliary sleeve 42 has two guide holes 45; the lower wall of the drive block 12 is fixedly installed with two plug rods 46, which are plugged into and adapted to the guide holes 45; the plug end of the guide hole 45 is provided with an assembly chamfer 47.

[0030] In use, when the positioning frame 6 drives the drive block 12 to descend, the insertion rod 46 is precisely inserted into the guide hole 45 of the auxiliary sleeve 42 through the guiding effect of the assembly chamfer 47, so as to achieve precise docking and positioning of the drive block 12 and the auxiliary sleeve 42. This effectively prevents lateral displacement when the positioning frame 6 descends to drill, ensures the coaxiality of the drill bit 31 and the crankcase machining hole, and improves drilling accuracy. The assembly chamfer 47 reduces the difficulty of alignment during insertion and docking, and improves the ease of operation.

[0031] A splash guard 48 is fixedly installed on the upper wall of the workbench 1. The splash guard 48 is located between the drive hinge base 2 and the crankcase body 25. The edge of the splash guard 48 is provided with a guide angle 49.

[0032] In use, the splash guard 48 forms a physical barrier, effectively blocking the iron filings and cutting coolant that splash towards the drive hinge base 2 during drilling, preventing the iron filings and coolant from intruding into the hinge rotation structure of the drive hinge base 2, and avoiding component jamming and corrosion; the guide angle 49 guides the iron filings and coolant falling on the splash guard 48 to slide down to the crankcase machining area side, blocking the iron filings and cutting coolant that bounce back during drilling, further preventing the iron filings and coolant from intruding into the hinge rotation structure of the drive hinge base 2.

[0033] A structural reinforcing rib 50 is fixedly installed between the support arm 11 and the vertical wall 9.

[0034] In use, the structural reinforcing rib 50 strengthens the connection structure between the support arm 11 and the vertical wall 9, greatly improving the structural rigidity and deformation resistance of the support arm 11, effectively offsetting the vibration and cutting force generated during drilling operations, preventing the support arm 11 from deforming or bending, ensuring the coaxiality and rotational stability of the transmission screw 8, avoiding feed deviation of the drill bit 31 due to structural deformation, and improving drilling accuracy and device service life.

[0035] A splash-proof corrugated cover 51 is fixedly installed between the upper wall of the positioning platform 3 and the lower wall of the positioning frame 6.

[0036] During use, the anti-splash corrugated cover 51 can adapt to the vertical lifting and lowering of the positioning frame 6 by extending and contracting, without affecting the drilling depth adjustment of the positioning frame 6; at the same time, it completely covers the core components such as the guide rod 4, the return spring 40, the positioning screw 18, and the stepped positioning block 19, preventing iron filings and coolant splashed from the drilling from entering the sliding fit gap and thread structure, preventing the components from jamming and corroding, and ensuring the smooth lifting and lowering of the positioning frame 6 and the accuracy of the depth limit.

[0037] In this embodiment, by adjusting the angle drive of the motor 15 and the feed adjustment of the transmission screw 8, combined with the synchronous transmission of the double drill bit 31, the crankcase body 25 can be quickly positioned and synchronously processed in different orientations, adapting to the changeover requirements of multiple crankcase specifications.

[0038] Specifically, the crankcase body 25 to be processed is securely clamped onto the worktable 1 using the crankcase clamp 24. Based on the required angle of the machining hole, the adjusting motor 15 is started, driving the drive gear 16 to rotate. Through meshing with the driven gear 17, the hinge base 2 rotates, thereby causing the positioning table 3, positioning frame 6, and drilling assembly to rotate synchronously, adjusting to the target drilling angle. The top rod 38 on the limit frame 37 provides rotational support for the driven gear 17 via the rotating top sleeve 39, ensuring meshing accuracy and preventing angular deviation.

[0039] After the angle adjustment is completed, the drive motor 7 is started, driving the drive screw 8 to rotate. Through the engagement of the screw sleeve 34 with the drive screw 8, the drive frame 33 is moved axially along the guide rod 10, adjusting the horizontal feed position of the drill bit 31 so that the drill bit 31 is precisely aligned with the machining hole position of the crankcase body 25. The drive motor 29 of the drilling assembly is started, driving the drive bevel gear 27 to rotate. Through two symmetrical driven bevel gears 28, the two tool holders 30 and the drill bit 31 are driven to rotate synchronously. The corrugated splash guards 36 on both sides of the drive frame 33 extend and retract synchronously with the drive frame 33, covering the drive screw 8 and the guide rod 10 to prevent iron filings from entering.

[0040] By gripping the handles 13 on both sides of the drive block 12 and applying downward force, the positioning frame 6 slides downward along the four guide rods 4, the reset spring 40 is compressed, and at the same time, the plug rod 46 under the drive block 12 is guided by the assembly chamfer 47 and accurately inserted into the guide hole 45 of the auxiliary sleeve 42 on the driven hinge base 41, pressing down the top plate 43 to compress the auxiliary spring 44, forming a two-way buffer; thus realizing the synchronous drilling operation of the two drill bits 31.

[0041] After drilling is completed, release handle 13. The return spring 40 will drive the positioning frame 6 to automatically lift and reset, and the drill bit 31 will disengage from the machining hole. If it is necessary to change to a drill bit 31 with a different hole diameter, simply disassemble the chuck 32. If it is necessary to change the type of crankcase to machine a different hole depth, move the ring 21 to disengage the limit rod 22 from the insertion positioning hole 20, rotate the stepped positioning block 19 to adjust the height along the positioning screw 18, and the drilling depth limit can be reset. After releasing the ring 21, the spring telescopic rod 23 will drive the limit rod 22 to reset and lock, quickly completing the type change and debugging.

[0042] In this embodiment, the depth of crankcase drilling is controlled consistently by using the stepped positioning block 19 for depth limiting and the bidirectional buffer support of the auxiliary sleeve 42, combined with multiple anti-splash protection structures, thus ensuring the stability of long-term processing and the service life of components.

[0043] Specifically, before batch processing, the drilling depth is calibrated: The lever 21 is pulled down to disengage the limiting rod 22 from the insertion positioning hole 20 of the stepped positioning block 19. The stepped positioning block 19 is rotated around the positioning screw 18, moving vertically along the screw to the set depth position until the insertion positioning hole 20 aligns with the limiting rod 22 again (the vertical movement distance of the stepped positioning block 19 is quantitatively determined by setting the thread pitch, ensuring a fixed rotation around the positioning screw 18). The lever 21 is then released, and the spring telescopic rod 23 drives the limiting rod 22 to re-insert into the corresponding insertion positioning hole 20, locking the position of the stepped positioning block 19 as the depth limit reference for batch processing. The splash-proof corrugated cover 51 covers the guide rod 4, the return spring 40, and the positioning screw 18, preventing iron filings from intruding into the sliding and threaded structures.

[0044] The first crankcase body 25 is clamped on the worktable 1 using the crankcase fixture 24. After adjusting the drilling angle and the position of the drill bit 31, the handle 13 is held down to press down the drive block 12, which drives the positioning frame 6 to descend until the lower wall of the positioning frame 6 abuts against the stepped end of the stepped positioning block 19, thus completing the drilling of the first piece. After verifying that the hole depth meets the process requirements, batch processing can begin.

[0045] During batch processing, once each crankcase is clamped, simply press down handle 13 to complete the fixed-depth drilling without needing to repeatedly adjust the depth, ensuring the consistency of hole depth in batch processing.

[0046] In this embodiment, the triple protection structure of the corrugated splash guard 36, the splash guard corrugated cover 51, and the splash guard plate 48, combined with the rotation support of the rotating top sleeve 39 and the sliding guidance of the guide rod 4, achieves comprehensive protection of the core transmission components under continuous production conditions, reduces component wear and jamming caused by iron filings and cutting fluid, extends the service life of the device, and reduces the equipment failure rate.

[0047] Specifically, for the continuous batch production of crankcases, the protective assembly of the device is completed in advance: corrugated splash guards 36 are installed between the transmission frame 33 and the vertical wall 9, and between the transmission frame 33 and the drive block 12, to completely cover the transmission lead screw 8 and the guide screw 10; a splash corrugated cover 51 is installed between the positioning table 3 and the positioning frame 6 to completely cover the guide rod 4, the return spring 40, the positioning screw 18, and the stepped positioning block 19; and a splash guard 48 is installed between the drive hinge base 2 and the crankcase body 25 to form a physical barrier between the processing area and the transmission area.

[0048] During continuous production, the splash guard 48 blocks high-pressure splashes of iron filings and cutting fluid generated during drilling. Its guide angle 49 at the edge guides the iron filings and cutting fluid to slide off into the machining area, preventing them from intruding into the hinge rotation gap of the drive hinge base 2 and the meshing gap between the drive gear 16 and the driven gear 17, thus preventing gear corrosion and hinge structure jamming. The limit bracket 37 provides peripheral protection for the adjusting motor 15, preventing iron filings from impacting the motor housing. The rotating top sleeve 39 at the end of the push rod 38 provides stable support for the driven gear 17, reducing radial movement during gear meshing and minimizing wear during continuous operation.

[0049] The corrugated anti-splash sleeve 36 adapts to the feed movement of the transmission frame 33, completely sealing the thread clearance of the transmission screw 8 and the sliding clearance of the guide rod 10, preventing iron filings from entering the thread and causing transmission jamming and decreased feed accuracy, and avoiding thread corrosion caused by cutting fluid; the anti-splash corrugated cover 51 adapts to the lifting and lowering of the positioning frame 6, blocking iron filings from entering the sliding clearance between the guide rod 4 and the positioning frame 6, preventing the return spring 40 from jamming and failing, and preventing the depth adjustment accuracy of the positioning screw 18 from decreasing.

[0050] After continuous production shutdown, there is no need to disassemble the overall structure. Only the end fasteners of the corrugated splash guard 36 and the splash guard 51 need to be removed to clean and lubricate the internal transmission components, making maintenance convenient. The triple protection structure effectively reduces component wear during continuous production, ensures the transmission accuracy and stability of the equipment during long-term operation, and reduces equipment failure rate and maintenance costs.

[0051] 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 multi-angle rapid drilling device for crankcases, characterized in that, include: A workbench (1) has a drive hinge base (2) fixedly installed on its upper wall; a positioning table (3) is fixedly installed on the drive end of the drive hinge base (2); four evenly distributed guide rods (4) are fixedly installed on the upper wall of the positioning table (3); a limit block (5) is detachably connected to the top of the guide rods (4); a positioning frame (6) is slidably connected on the guide rods (4); a transmission motor (7) is fixedly installed on the upper wall of the positioning frame (6); a transmission screw (8) is fixedly connected to the drive end of the transmission motor (7); and a drilling assembly is screwed onto the transmission screw (8). The vertical wall (9) is fixedly installed on the upper wall of the positioning frame (6) and rotatably connected to the drive end of the transmission motor (7); two optical rods (10) and a support arm (11) are fixedly installed on the side wall of the vertical wall (9) away from the transmission motor (7), and the two optical rods (10) and the support arm (11) are symmetrically distributed along both sides of the transmission screw (8). The drive block (12) is fixedly installed at the end of the support arm (11) away from the vertical wall (9), and handles (13) are fixedly installed on both its left and right side walls; a screw adapter sleeve (14) is fixedly installed on the side wall of the drive block (12) facing the vertical wall (9), and the screw adapter sleeve (14) is rotatably adapted to the transmission screw (8); The adjusting motor (15) is fixedly installed on the upper wall of the workbench (1), and a driving gear (16) is fixedly installed on its driving end; a driven gear (17) is fixedly installed on the hinge end of the driving hinge base (2) on the side away from the vertical wall (9), and the driven gear (17) meshes with the driving gear (16). A positioning screw (18) is fixedly installed at the center of the upper wall of the positioning platform (3), and a stepped positioning block (19) is screwed onto its outer wall; the lower wall of the stepped end of the stepped positioning block (19) is provided with several evenly distributed insertion positioning holes (20), and a flange (21) is fitted on its outer wall surface; several limiting rods (22) are fixedly installed on the upper wall of the flange (21), and the limiting rods (22) correspond one-to-one with the insertion positioning holes (20) and are inserted and adapted; several evenly distributed spring telescopic rods (23) are fixedly installed on the lower wall of the flange (21). A crankcase clamp (24) is detachably mounted on the upper wall of the worktable (1), and a crankcase body (25) is clamped on the crankcase clamp (24).

2. The crankcase multi-angle rapid drilling device according to claim 1, characterized in that, The drilling assembly includes: The transmission box (26) has a drive bevel gear (27) rotatably connected at the top center. The bottom wall of the transmission box (26) is rotatably connected to two driven bevel gears (28). The two driven bevel gears (28) are symmetrically distributed along the drive bevel gear (27) and both mesh with the drive bevel gear (27). The drive motor (29) is fixedly installed on the upper wall of the transmission box (26), and its drive end is fixedly connected to the drive bevel gear (27); The tool holder (30) passes through the transmission box (26) and is fixedly connected to the end of the driven bevel gear (28) away from the drive motor (29); The drill bit (31) is detachably connected to the tool holder (30) via the chuck (32); The transmission frame (33) is fixedly installed on the outer wall of the transmission box (26); a screw sleeve (34) is fixedly installed in the center of the transmission frame (33), and the screw sleeve (34) is screwed into the transmission screw (8); the transmission frame (33) has two guide holes (35), and the guide holes (35) correspond one-to-one with the light bar (10) and are slidably adapted.

3. The crankcase multi-angle rapid drilling device according to claim 2, characterized in that, Corrugated splash guards (36) are fixedly installed between the transmission frame (33) and the vertical wall (9) and between the transmission frame (33) and the drive block (12).

4. The crankcase multi-angle rapid drilling device according to claim 1, characterized in that, A limiting frame (37) is fixedly installed on the upper wall of the workbench (1), and the limiting frame (37) is sleeved around the adjusting motor (15). A top rod (38) is fixedly installed on the side wall of the limiting frame (37) facing the drive gear (16), and a rotating top sleeve (39) is fixedly installed at the end of the top rod (38). The rotating top sleeve (39) is rotatably connected to the driven gear (17).

5. The crankcase multi-angle rapid drilling device according to claim 1, characterized in that, The guide rod (4) is fitted with a reset spring (40) on its outer wall. The two ends of the reset spring (40) are fixedly connected to the upper wall of the positioning platform (3) and the lower wall of the positioning frame (6), respectively.

6. The crankcase multi-angle rapid drilling device according to claim 5, characterized in that, A driven hinge base (41) is fixedly installed on the upper wall of the workbench (1), and the driven hinge base (41) corresponds vertically to the drive block (12); an auxiliary sleeve (42) is fixedly installed on the drive end of the driven hinge base (41), a top plate (43) is slidably connected inside the auxiliary sleeve (42), and a number of auxiliary springs (44) are fixedly installed between the top plate (43) and the bottom wall of the auxiliary sleeve (42).

7. A crankcase multi-angle rapid drilling device according to claim 6, characterized in that, The upper wall of the auxiliary sleeve (42) has two guide holes (45); the lower wall of the drive block (12) is fixedly equipped with two plug rods (46), which are plugged into and adapted to the guide holes (45); the plug end of the guide hole (45) is provided with an assembly chamfer (47).

8. The crankcase multi-angle rapid drilling device according to claim 1, characterized in that, A splash guard (48) is fixedly installed on the upper wall of the workbench (1). The splash guard (48) is located between the drive hinge base (2) and the crankcase body (25). The edge of the splash guard (48) is provided with a guide angle (49).

9. A crankcase multi-angle rapid drilling device according to claim 1, characterized in that, A structural reinforcing rib (50) is fixedly installed between the support arm (11) and the vertical wall (9).

10. A crankcase multi-angle rapid drilling device according to claim 1, characterized in that, A splash-proof corrugated cover (51) is fixedly installed between the upper wall of the positioning platform (3) and the lower wall of the positioning frame (6).

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