Motor shaft efficient continuous drilling processing device

Abstract

The application relates to an efficient continuous drilling device for a motor shaft, which comprises a rotating disc, a fixing base, a driving part one, a driving conversion assembly, three clamp assemblies and two drilling assemblies. The driving part one drives the rotating disc to rotate on the fixing base. An upper and lower material loading and unloading station, a center hole processing station and an inclined hole processing station are arranged on the rotating disc. The three clamp assemblies are arranged on the three stations respectively. The clamp assembly comprises a fixing frame, a clamp body and a first locking part. The fixing frame is fixedly arranged on the rotating disc. The clamp body is rotatably connected to the fixing frame through a first shaft. The driving conversion assembly is used for driving the clamp body on the corresponding station to switch to a preset state. The driving part one drives the rotating disc to intermittently rotate. The three stations can be synchronously operated. An operator only needs to stand at the upper and lower material loading and unloading station to take and place workpieces and preliminarily position the workpieces, so that the interval between processes is greatly shortened. The clamp body can be automatically switched to the processing preset state in cooperation with the driving conversion assembly, manual angle adjustment is not needed, and the processing efficiency of the motor shaft drilling is improved.

Description

Technical Field

[0001] This invention relates to the field of motor shaft machining equipment, and in particular to a high-efficiency continuous drilling machining equipment for motor shafts. Background Technology

[0002] The motor shaft is a key basic component in mechanical equipment. Its main functions are to transmit torque, bear loads, support rotating parts, and ensure their precise rotation. It is the core transmission hub connecting the drive source and the actuator, directly determining the power transmission efficiency, operating accuracy, and overall reliability of the equipment.

[0003] Related technologies for motor shafts 6 workpieces, such as Figure 1 As shown, a hole needs to be made along its central axis, and an inclined hole 62 is made along the inclined direction to connect the central hole 61.

[0004] The common machining method for the aforementioned motor shaft is as follows: First, the motor shaft is positioned and clamped on a fixture to complete the machining of the center hole; then, the operator needs to remove the workpiece and reposition and clamp it on another fixture to machine the oblique hole. This leads to interruptions in the production process and requires operators to repeatedly pick up, place, transfer, and re-clamp the workpiece between multiple workstations or fixtures, resulting in fragmented processes and low efficiency. Summary of the Invention

[0005] To improve the machining efficiency of drilling motor shafts, this application provides a high-efficiency continuous drilling device for motor shafts.

[0006] The high-efficiency continuous drilling device for motor shafts provided in this application adopts the following technical solution:

[0007] A high-efficiency continuous drilling device for motor shafts includes a turntable, a fixed base, a first driving component, a driving conversion assembly, three clamping assemblies, and two drilling assemblies. The first driving component drives the turntable to rotate on the fixed base. The turntable has three stations evenly arranged around its circumference. The three stations are, in order, a loading and unloading station, a center hole machining station, and an inclined hole machining station. The three clamping assemblies are respectively set at the three stations. The two drilling assemblies are respectively arranged in a one-to-one correspondence with the center hole machining station and the inclined hole machining station.

[0008] The fixture assembly includes a fixed frame, a fixture body, and a first locking member. The fixed frame is fixedly mounted on the turntable. The fixture body has a first shaft and is rotatably connected to the fixed frame through the first shaft. The fixture body is used to position the motor shaft. The first locking member is used to lock and fix the motor shaft to the fixture body. The drive conversion assembly is used to drive the fixture body at the corresponding workstation to switch to a preset state.

[0009] By adopting the above technical solution, the drilling process for motor shafts is integrated and can be carried out continuously, solving the pain points of traditional processing processes being scattered and requiring repeated clamping. The drive unit drives the turntable to rotate intermittently, allowing for simultaneous operation at the three stations. Operators only need to stand at the loading and unloading stations to simultaneously pick up and place workpieces and perform initial positioning, significantly shortening the process interval. The fixture body is rotatably connected to the fixed frame via the first shaft, and with the help of the drive conversion component, it can automatically switch to the preset processing state without requiring manual angle adjustment, thus improving the processing efficiency of drilling motor shafts.

[0010] Preferably, the fixed base includes a base and a fixed platform. The fixed platform is fixedly disposed above the base. The turntable is sleeved on the outer periphery of the fixed platform and rotates in cooperation with the fixed platform. The drive conversion assembly includes a fixed ring, a second locking member, and three linkage transmission assemblies. The three linkage transmission assemblies are connected to three clamping assemblies in a one-to-one correspondence, and are used to convert the rotation of the clamping body into the vertical movement of the linkage.

[0011] The fixing ring is fixedly installed on the fixing platform. The top surface of the fixing ring has a guide surface with varying height. Each of the linkage transmission components has an abutment part, which rolls or slides against the guide surface. The second locking member is used to completely lock the fixture body located at the work station.

[0012] By adopting the above technical solution, a stable angle adjustment and locking mechanism is formed, providing a guarantee for the switching of fixture states. With the help of the turntable power, the fixed ring guide surface drives the linkage transmission assembly to adjust the angle of the fixture, eliminating the need for a separate angle drive source, simplifying the structure, reducing energy consumption, and working with the second locking component to ensure stable drilling posture.

[0013] Preferably, the guide surface is recessed at the positions corresponding to the three workstations.

[0014] By adopting the above technical solution, the fixture is ensured to be accurate and stable at each station. The guide surface is recessed at the corresponding station to allow the abutment part to engage and be positioned, avoiding angular deviation.

[0015] Preferably, the linkage transmission assembly includes a wheel, a connecting rod, a lifting rod, a roller, and a second driving component. The wheel is coaxially fixedly connected to a first shaft, the lifting rod is slidably connected to a fixed frame in the vertical direction, the two ends of the connecting rod are respectively hinged to the wheel and the lifting rod, and the roller is rotatably mounted on the bottom end of the lifting rod and rolls against the guide surface as an abutment part. The second driving component is disposed on the fixed frame and is used to apply a downward preload to the lifting rod.

[0016] By adopting the above technical solution, precise transmission and stable adjustment of the fixture angle are achieved. The wheel is fixed coaxially with the first axis, which can accurately transmit the vertical movement of the lifting rod to the wheel through the connecting rod, driving the fixture body to rotate around the first axis. This results in high transmission efficiency and controllable angle accuracy, avoiding motion transmission deviation. The lifting rod is slidably connected to the fixed frame in the vertical direction to ensure the straightness of the lifting. The bottom roller acts as a contact part, converting sliding friction into rolling friction, greatly reducing resistance, reducing component wear, lowering power consumption, and improving the smoothness of angle adjustment. The second drive component applies a downward preload to the lifting rod to ensure that the roller is always in close contact with the guide surface, avoiding gaps that could cause angle adjustment lag or deviation, and coping with the impact of changes in guide surface height to ensure precise angle switching of the fixture body.

[0017] Preferably, the second driving component includes a cover and a spring. The cover is fixedly mounted on a corresponding fixing frame and covers the lifting rod. The two ends of the spring abut against the inner top wall of the cover and the top end of the lifting rod, respectively.

[0018] By adopting the above technical solution, continuous pre-tensioning of the lifting rod is achieved with a simple structure, balancing effectiveness and protection. The spring provides uniform pre-tension force and buffers vibration, extending component life; the cover protects against impurities from intrusion, and the limit spring ensures stable pre-tension force direction. No additional power is required, making it suitable for continuous processing and reducing maintenance costs.

[0019] Preferably, the second locking component includes three brackets and two locking slots opened at different height positions on the lifting rod. The three brackets are respectively fixedly installed on the fixed platform, and the three brackets correspond to three work positions. The locking slots of the loading / unloading work position and the center hole processing work position are at the same height and use the same locking slot. The top of the bracket is bent to form a locking block. When the turntable rotates to the position of the fixture body, the locking block enters the corresponding locking slot.

[0020] By adopting the above technical solution, automatic locking of the fixture station is achieved, adapting to continuous machining cycles. The bracket locking block automatically engages with the locking slot as the turntable arrives at its position, eliminating the need for manual operation. The shared locking slot between two stations simplifies the structure, while the dedicated slot for the angled hole station adapts to the machining angle, and automatic unlocking does not disrupt the workflow.

[0021] Preferably, the fixture body includes a main block and two support blocks. The top of the main block has a double-sloped positioning opening for the top of the motor shaft to abut against. The two support blocks are respectively fixed to the bottom of the main block by screws. The two support blocks are used to support the stepped surface at the bottom of the motor shaft. A gap is left between the two support blocks for the part of the motor shaft located below the stepped surface to pass through.

[0022] By adopting the above technical solution, precise positioning and fitting of the motor shaft are achieved, improving the versatility of the fixture. The double-beveled opening enables automatic centering of the motor shaft, ensuring coaxiality of the drilling; the spacing can be adjusted by replacing the support blocks to accommodate motor shafts of different specifications.

[0023] Preferably, the first locking component includes a hydraulic cylinder, which is fixedly mounted on a fixed base. The piston rod of the hydraulic cylinder extends out and abuts against the motor shaft. The piston rod of the hydraulic cylinder is coaxially arranged with the first shaft.

[0024] By adopting the above technical solution, the motor shaft is securely locked, ensuring machining stability. The hydraulic cylinder provides sufficient locking force to resist cutting vibration and prevent motor shaft displacement. The piston rod is coaxial with the first shaft, avoiding eccentric deformation and enhancing coaxiality to reduce errors. The hydraulic cylinder responds quickly, adapts to the turntable cycle time, and the hydraulic drive is reliable and durable, suitable for industrial production.

[0025] The main technical effects of this invention are reflected in the following aspects:

[0026] 1. This invention integrates and enables continuous operation of the motor shaft drilling process, solving the problems of scattered processes and repeated clamping in traditional machining. The drive unit intermittently rotates the turntable, allowing simultaneous operation at three stations. Operators only need to stand at the loading and unloading stations to simultaneously pick up and place workpieces and perform initial positioning, significantly shortening process intervals. The fixture body is rotatably connected to the fixed frame via the first shaft, and can automatically switch to the preset machining state with the drive conversion component, eliminating the need for manual angle adjustment and improving the machining efficiency of motor shaft drilling.

[0027] 2. This invention achieves automatic locking of the fixture station, adapting to continuous machining cycles. The bracket locking block automatically engages with the locking slot as the turntable reaches its position, requiring no manual operation. The shared locking slot for both stations simplifies the structure, and the dedicated slot for the angled hole station adapts to the machining angle; unlocking is completed automatically without affecting the workflow. Attached Figure Description

[0028] Figure 1 This is a structural schematic diagram of the motor shaft workpiece of this application.

[0029] Figure 2 This is a schematic diagram of the overall structure of an embodiment of this application.

[0030] Figure 3 This is a schematic diagram illustrating the interaction between the drive conversion component, the fixture component, and the turntable in an embodiment of this application.

[0031] Figure 4 This is a schematic diagram of the structure of the driving transformation component in an embodiment of this application.

[0032] Figure 5 This is a schematic diagram of the drive transformation component from another angle in an embodiment of this application.

[0033] Figure 6 This is a schematic diagram of the drive structure of the turntable in an embodiment of this application.

[0034] Explanation of reference numerals in the attached drawings: 1. Drilling assembly; 11. Coolant guide pipe; 2. Turntable; 21. Annular waste chip trough; 22. Motor; 23. Internal gear ring; 24. Gear; 25. Loading / unloading station; 26. Center hole machining station; 27. Inclined hole machining station; 3. Fixed seat; 31. Base; 32. Fixed platform; 4. Fixture assembly; 41. Fixed frame; 42. Fixture body; 421. Main block; 422. Support block; 43. First shaft; 44. Hydraulic cylinder; 5. Drive conversion assembly; 51. Fixed ring; 511. Guide surface; 52. Wheel; 53. Connecting rod; 54. Lifting rod; 55. Roller; 56. Cover; 57. Spring; 58. Bracket; 581. Locking block; 59. Locking groove; 6. Motor shaft; 61. Center hole; 62. Inclined hole. Detailed Implementation

[0035] The following is in conjunction with the appendix Figures 1-6 This application will be described in further detail to make the technical solution of this application easier to understand and master.

[0036] This application discloses a high-efficiency continuous drilling device for motor shafts.

[0037] Reference Figures 1-3 The high-efficiency continuous drilling device for motor shafts in this embodiment includes a turntable 2, a fixed base 3, a drive component 1, a drive conversion component 5, three clamping components 4, and two drilling components 1. The drive component 1 drives the turntable 2 to rotate on the fixed base 3. Three workstations are evenly arranged around the turntable 2 in a circumferential direction. The three workstations are, in order, a loading and unloading workstation 25, a center hole processing workstation 26, and an oblique hole processing workstation 27. The three clamping components 4 are respectively arranged on the three workstations. The two drilling components 1 are respectively arranged in a one-to-one correspondence with the center hole processing workstation 26 and the oblique hole processing workstation 27.

[0038] Reference Figure 2 and Figure 3 The fixture assembly 4 includes a fixed frame 41, a fixture body 42, and a first locking member. The fixed frame 41 is fixedly mounted on the turntable 2. The fixture body 42 has a first shaft 43 and is rotatably connected to the fixed frame 41 through the first shaft 43. The fixture body 42 is used to position the motor shaft 6. The first locking member is used to lock and fix the motor shaft 6 to the fixture body 42. The drive conversion assembly 5 is used to drive the fixture body 42 at the corresponding workstation to switch to a preset state.

[0039] Reference Figures 1-3This system integrates and enables continuous operation of the drilling process on the motor shaft 6, solving the problems of fragmented processing and repeated clamping in traditional machining. The drive unit 1 drives the turntable 2 to rotate intermittently, allowing simultaneous operation at all three stations. Operators only need to stand at the loading / unloading station 25 to simultaneously pick up and place workpieces and perform initial positioning, significantly reducing process intervals. The fixture body 42 is rotatably connected to the fixed frame 41 via the first shaft 43. With the help of the drive conversion component 5, it can automatically switch to the preset processing state, eliminating the need for manual angle adjustments and improving the machining efficiency of drilling on the motor shaft 6.

[0040] Reference Figures 2-4 The fixed base 3 includes a base 31 and a fixed platform 32. The fixed platform 32 is fixedly installed above the base 31. The turntable 2 is sleeved on the outer periphery of the fixed platform 32 and rotates in cooperation with the fixed platform 32. The drive conversion assembly 5 includes a fixed ring 51, a second locking member and three linkage transmission assemblies. The three linkage transmission assemblies are connected to the three clamp assemblies 4 one by one, and are used to convert the rotation of the clamp body 42 into the vertical movement of the linkage 53.

[0041] Reference Figures 2-4 The fixing ring 51 is fixedly installed on the fixing platform 32. The top surface of the fixing ring 51 has a guide surface 511 with varying height. Each linkage transmission assembly has an abutment part, which rolls or slides against the guide surface 511. The second locking member is used to completely lock the fixture body 42 located at the work station.

[0042] Reference Figures 2-4 This forms a stable angle adjustment and locking mechanism, ensuring the smooth switching of the fixture's state. Powered by the turntable 2, the guide surface 511 of the fixed ring 51 drives the linkage transmission assembly to adjust the fixture's angle. This eliminates the need for a separate angle drive source, simplifying the structure and reducing energy consumption. Combined with the second locking component, it ensures stable drilling posture.

[0043] Reference Figure 4 The guide surface 511 is recessed at each of the three workstations. This ensures the fixture is accurate and stable at each workstation. The recessed design of the guide surface 511 at each workstation allows the contact part to be positioned correctly, preventing angular deviation.

[0044] Reference Figures 3-5 The linkage transmission assembly includes a wheel 52, a connecting rod 53, a lifting rod 54, a roller 55, and a second driving component. The wheel 52 is coaxially fixedly connected to the first shaft 43. The lifting rod 54 is slidably connected to the fixed frame 41 in the vertical direction. The two ends of the connecting rod 53 are respectively hinged to the wheel 52 and the lifting rod 54. The roller 55 is rotatably mounted on the bottom end of the lifting rod 54 and rolls against the guide surface 511 as an abutment part. The second driving component is set on the fixed frame 41 and is used to apply a downward preload to the lifting rod 54.

[0045] Reference Figures 3-5This system enables precise transmission and stable adjustment of the clamp angle. The wheel 52 is coaxially fixed with the first shaft 43, allowing the vertical movement of the lifting rod 54 to be precisely transmitted to the wheel 52 via the connecting rod 53. This drives the clamp body 42 to rotate around the first shaft 43, resulting in high transmission efficiency and controllable angle precision, avoiding motion transmission deviations. The lifting rod 54 slides vertically to the fixed frame 41, ensuring straightness of the lifting motion. The bottom roller 55 acts as a contact point, converting sliding friction into rolling friction, significantly reducing resistance. This reduces component wear, lowers power consumption, and improves the smoothness of angle adjustment. The second drive component applies a downward preload to the lifting rod 54, ensuring that the roller 55 remains in close contact with the guide surface 511, preventing gaps that could cause angle adjustment lag or deviation, and handling impacts from changes in the height of the guide surface 511, ensuring precise angle switching of the clamp body 42.

[0046] Reference Figure 5 The second driving component includes a cover 56 and a spring 57. The cover 56 is fixedly mounted on the corresponding fixing frame 41 and covers the lifting rod 54. The two ends of the spring 57 abut against the inner top wall of the cover 56 and the top of the lifting rod 54, respectively.

[0047] Reference Figure 5 The lifting rod 54 is continuously pre-tensioned using a simple structure, balancing effectiveness and protection. The spring 57 provides uniform pre-tension force and buffers vibration, extending component life; the cover 56 protects against impurities from intrusion, and the limiting spring 57 ensures stable pre-tension force direction. No additional power is required, making it suitable for continuous processing and reducing maintenance costs.

[0048] Reference Figures 3-5 The second locking component includes three brackets 58 and two locking slots 59 at different heights on the lifting rod 54. The three brackets 58 are fixedly mounted on the fixed platform 32 by screws. The three brackets 58 correspond to three work stations. The locking slots 59 of the loading / unloading work station 25 and the center hole machining work station 26 are at the same height and use the same locking slot 59. The top of the bracket 58 is bent to form a locking block 581. When the turntable 2 rotates to the position of the fixture body 42, the locking block 581 enters the corresponding locking slot 59.

[0049] Reference Figures 3-5 This system enables automatic locking of the fixture station, adapting to continuous machining cycles. The locking block 581 of the bracket 58 automatically engages with the locking slot 59 as the turntable 2 reaches its position, requiring no manual operation. The shared locking slot 59 between the two stations simplifies the structure, while the dedicated slot for the angled hole 62 adapts to the machining angle, and automatic unlocking does not disrupt the workflow.

[0050] Reference Figure 2 and Figure 3The fixture body 42 includes a main block 421 and two support blocks 422, with a first shaft 43 fixed to the main block 421. The top of the main block 421 has a double-sloped positioning opening for the top of the motor shaft 6 to abut against. The two support blocks 422 are fixed to the bottom of the main block 421 by screws. The two support blocks 422 support the stepped surface at the bottom of the motor shaft 6, with a gap between them allowing the portion of the motor shaft 6 below the stepped surface to pass through. This design enables precise positioning and clamping of the motor shaft 6, improving the fixture's versatility. The double-sloped opening allows for automatic centering of the motor shaft 6, ensuring coaxiality during drilling; the spacing can be adjusted by replacing the support blocks 422 to accommodate motor shafts of different specifications.

[0051] Reference Figure 2 and Figure 3 The first locking component includes a hydraulic cylinder 44, which is fixedly mounted on the fixed base 3. After the piston rod of the hydraulic cylinder 44 extends out, it abuts against the motor shaft 6. The piston rod of the hydraulic cylinder 44 is coaxially arranged with the first shaft 43.

[0052] Reference Figure 2 and Figure 3 This ensures a secure lock-up of the motor shaft 6, guaranteeing machining stability. The hydraulic cylinder 44 provides ample locking force to resist cutting vibrations and prevent displacement of the motor shaft 6. The piston rod is coaxial with the first shaft 43, avoiding eccentric deformation and enhancing coaxiality to reduce errors. The hydraulic cylinder 44 offers rapid response, is compatible with two-stage turntable operation, and its hydraulic drive is reliable, durable, and suitable for industrial production.

[0053] Reference Figure 2 The drilling assembly 1 utilizes existing mature technology. Its internal drilling motor drives the drill spindle to rotate, causing the drill bit to feed vertically. Simultaneously, a coolant guide pipe 11 sprays coolant towards the drill bit. The turntable 2 has a circumferentially circumferentially arranged annular chip trough 21 to collect processing chips. A drain hole at the bottom discharges coolant. The discharged coolant needs to be recycled.

[0054] Reference Figure 2 and Figure 6The first driving component is a motor 22, which is fixedly mounted on the base 31. An internal gear ring 23 is provided on the inner circumferential wall of the bottom of the turntable 2. A gear 24 is provided on the output shaft of the motor 22, and the gear 24 meshes with the internal gear ring 23 to drive the turntable 2 to rotate. The first driving component can also adopt any structure capable of driving the turntable 2 to rotate. Regarding the oil supply to the cylinder 44, currently, a multi-channel hydraulic rotary joint is often installed on the fixed platform 32. The stationary part of the rotary joint is connected to the fixed platform 32 and connected to the oil supply and return pipes from an external hydraulic station. The rotating part of the rotary joint rotates synchronously with the turntable 2 and connects to the pipelines leading to the cylinders 44 at each workstation. When the turntable 2 rotates, the precision sealing structure inside the rotary joint maintains the independence and sealing of each channel during relative rotation, achieving continuous and non-entangled transmission of pressurized oil.

[0055] Reference Figure 3 and Figure 5 During the rotation of the fixture body 42, the piston rod of the hydraulic cylinder 44 can retract a certain distance, allowing the fixture body 42 to rotate smoothly. The lowest point of the recess of the guide surface 511 has a horizontal section to allow the locking block 581 to enter the locking groove 59.

[0056] Of course, the above are just typical examples of this application. In addition, this application may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed in this application.

Claims

1. A high-efficiency continuous drilling device for motor shafts, characterized in that: It includes a turntable (2), a fixed base (3), a drive component 1, a drive conversion component (5), three clamping components (4) and two drilling components (1). The drive component 1 drives the turntable (2) to rotate on the fixed base (3). The turntable (2) is evenly provided with three workstations around its circumference. The three workstations are loading and unloading workstation (25), center hole machining workstation (26) and oblique hole machining workstation (27) in sequence. The three clamping components (4) are respectively set on the three workstations. The two drilling components (1) are respectively arranged in a one-to-one correspondence with the center hole machining workstation (26) and the oblique hole machining workstation (27). The clamp assembly (4) includes a fixed frame (41), a clamp body (42), and a first locking member. The fixed frame (41) is fixedly mounted on the turntable (2). The clamp body (42) has a first shaft (43) and is rotatably connected to the fixed frame (41) through the first shaft (43). The clamp body (42) is used to position the motor shaft (6). The first locking member is used to lock and fix the motor shaft (6) to the clamp body (42). The drive conversion assembly (5) is used to drive the clamp body (42) at the corresponding workstation to switch to a preset state. The fixed base (3) includes a base (31) and a fixed platform (32). The fixed platform (32) is fixedly installed above the base (31). The turntable (2) is sleeved on the outer periphery of the fixed platform (32) and rotates in cooperation with the fixed platform (32). The drive conversion assembly (5) includes a fixed ring (51), a second locking member and three linkage transmission assemblies. The three linkage transmission assemblies are connected to the three clamp assemblies (4) one by one, and are used to convert the rotation of the clamp body (42) into the vertical movement of the linkage (53). The fixing ring (51) is fixedly installed on the fixing platform (32). The top surface of the fixing ring (51) has a guide surface (511) with varying height. Each of the linkage transmission components has an abutment part, which rolls or slides against the guide surface (511). The second locking member is used to completely lock the fixture body (42) located at the work station.

2. The high-efficiency continuous drilling device for motor shafts according to claim 1, characterized in that: The guide surface (511) is recessed at the positions corresponding to the three workstations.

3. The high-efficiency continuous drilling device for motor shafts according to claim 1, characterized in that: The linkage transmission assembly includes a wheel (52), a connecting rod (53), a lifting rod (54), a roller (55), and a second driving component. The wheel (52) is coaxially fixedly connected to the first shaft (43). The lifting rod (54) is slidably connected to the fixed frame (41) in the vertical direction. The two ends of the connecting rod (53) are respectively hinged to the wheel (52) and the lifting rod (54). The roller (55) is rotatably installed at the bottom end of the lifting rod (54) and rolls against the guide surface (511) as an abutment part. The second driving component is set on the fixed frame (41) and is used to apply a downward preload to the lifting rod (54).

4. The high-efficiency continuous drilling device for motor shafts according to claim 3, characterized in that: The second driving component includes a cover (56) and a spring (57). The cover (56) is fixedly mounted on the corresponding fixing frame (41). The cover (56) covers the top of the lifting rod (54). The two ends of the spring (57) abut against the inner top wall of the cover (56) and the top of the lifting rod (54), respectively.

5. The high-efficiency continuous drilling device for motor shafts according to claim 3, characterized in that: The second locking component includes three brackets (58) and two locking slots (59) at different heights on the lifting rod (54). The three brackets (58) are fixedly mounted on the fixed platform (32). The three brackets (58) correspond to three work stations. The locking slots (59) of the loading / unloading work station (25) and the center hole machining work station (26) are at the same height and use the same locking slot (59). The top of the bracket (58) is bent to form a locking block (581). When the turntable (2) rotates to the position of the fixture body (42), the locking block (581) enters the corresponding locking slot (59).

6. The high-efficiency continuous drilling device for motor shafts according to claim 1, characterized in that: The fixture body (42) includes a main block (421) and two support blocks (422). The top of the main block (421) has a double-sloped positioning opening for the top of the motor shaft (6) to abut. The two support blocks (422) are fixed to the bottom of the main block (421) by screws. The two support blocks (422) are used to support the stepped surface at the bottom of the motor shaft (6). A gap is left between the two support blocks (422) for the part of the motor shaft (6) located below the stepped surface to pass through.

7. The high-efficiency continuous drilling device for motor shafts according to claim 6, characterized in that: The first locking component includes a hydraulic cylinder (44), which is fixedly mounted on a fixed base (3). The piston rod of the hydraulic cylinder (44) extends out and abuts against the motor shaft (6). The piston rod of the hydraulic cylinder (44) is coaxially arranged with the first shaft (43).

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