Drilling device for motor rotor machining

Abstract

The invention discloses a drilling device for motor rotor machining, and belongs to the field of motor rotor machining. A drilling device for machining a motor rotor comprises a workbench and a drilling machine fixedly connected with the top of the workbench, and further comprises a pre-tightening mechanism arranged under the drilling machine and used for pre-tightening the motor rotor; the adjusting mechanism is arranged in the drilling machine and used for adjusting the clamped motor rotor; the driving mechanism is fixed under the top of the workbench; the rotor can be preliminarily pre-tightened and positioned, the problem that machining errors or rotor scrapping may be caused due to the fact that the rotor is difficult to adjust once positioning inaccuracy is found in final fixation is solved, secondary fixation is performed under friction force adjustment, and finally the rotor and the drilling head can be extruded and finally fixed. And the problem of shaking easily caused by insufficient clamping force is prevented, and the working quality of the drilling device is further improved.

Description

Technical Field

[0001] The invention relates to the technical field of motor rotor processing, and in particular to a drilling device for motor rotor processing. Background Art

[0002] The motor rotor is the rotating part in the motor. The motor consists of two parts, the rotor and the stator. It is a device used to realize the conversion of electrical energy into mechanical energy and mechanical energy into electrical energy. The motor rotor is divided into motor rotor and generator rotor. The motor rotor is divided into two types: inner rotor rotation mode and outer rotor rotation mode. The inner rotor rotation mode is that the core in the middle of the motor is the rotating body, outputting torque (referring to the motor) or inputting energy (referring to the generator). The outer rotor rotation mode is that the outer body of the motor is the rotating body, and the inner rotor is generally composed of a drive shaft and an iron core winding. Different methods facilitate the application in various occasions. In the process of motor processing, a drilling device for motor rotor processing is required to facilitate drilling of the motor rotor.

[0003] The existing drilling devices for motor rotor processing generally fix the rotor directly by means of a clamp during the process of drilling holes in the rotor, so as to ensure the stability of the rotor during operation. However, if the rotor surface is directly fixed for final purpose, once the positioning is found to be inaccurate, it will be difficult to adjust, which may lead to processing errors or rotor scrapping, further reducing the working efficiency of the drilling device. Summary of the invention

[0004] The purpose of the present invention is to solve the problem in the prior art that once the final fixation is found to be inaccurately positioned, it will be difficult to adjust, which may lead to processing errors or rotor scrapping, and to propose a drilling device for motor rotor processing.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A drilling device for processing a motor rotor comprises a workbench and a drilling machine fixedly connected to the top of the workbench, and also comprises: a pre-tightening mechanism arranged directly below the drilling machine for pre-tightening the motor rotor; an adjusting mechanism arranged inside the drilling machine for adjusting the motor rotor during clamping; a driving mechanism fixed directly below the top of the workbench for connecting and adjusting the side wall of the pre-tightening mechanism; and an ejector rod fixed directly above the workbench and directly below the pre-tightening mechanism.

[0006] Preferably, the pre-tightening mechanism includes a support tube 1 located directly below the hole-turning machine, the top of the support tube 1 is fixedly connected to a support tube 2, the interior of the support tube 2 is slidably connected to a sliding rod, the top of the sliding rod is fixedly connected to a placement plate, the bottom of the placement plate is rotatably connected to a clamping claw via a rotating shaft, and the clamping claw is used to pre-tighten the motor rotor.

[0007] Preferably, the adjustment mechanism includes an adjusting threaded barrel that rotates on the surface of the sliding rod through a bearing, the internal thread of the adjusting threaded barrel is connected to a hollow threaded rod, the end of the hollow threaded rod is slidably connected to the inner wall of the sliding rod, the interior of the hollow threaded rod is fitted with a plastic sleeve, and the end of the plastic sleeve is fixed in the sliding rod.

[0008] Preferably, the driving mechanism comprises a cylinder fixed just below the top of the workbench, an output end of the cylinder is connected to a connecting plate, and the connecting plate is fixed to the bottom of the supporting cylinder.

[0009] Preferably, the end of the hollow threaded rod is fixedly connected to a ratchet assembly, a matching outer disc is provided at the bottom of the ratchet assembly, a tooth groove is provided on the circumference of the inner wall of the outer disc, and the outer disc is fixed to an inner wall of the support tube.

[0010] Preferably, the ratchet assembly includes an inner disk fixed at the end of a hollow threaded rod, a mounting groove is provided at the bottom of the inner disk, a ratchet is rotatably connected to the interior of the mounting groove via a rotating shaft, a torsion spring is fixedly connected to the interior of the mounting groove, and one end of the torsion spring is attached to the surface of the ratchet.

[0011] Preferably, the clamping claw includes a support rod fixed at the top of the support cylinder, the interior of the support rod is rotatably connected to a rotating rod via a rotating shaft, one end of the rotating rod is rotatably connected to a linkage rod via a rotating shaft, and the other end of the linkage rod is rotatably connected to the bottom of the placement plate via a rotating shaft.

[0012] Preferably, the other end of the rotating rod is rotatably connected to an adjusting clamping block via a rotating shaft, and a rubber pad is fixedly connected to the surface of the adjusting clamping block.

[0013] Preferably, a return spring is sleeved on the surface of the sliding rod, and two ends of the return spring are respectively fixedly connected to the placement plate and the placement plate.

[0014] Compared with the prior art, the present invention provides a drilling device for motor rotor machining, which has the following beneficial effects: 1. The motor rotor machining drilling device, through the cooperation between the support tube 1, the support tube 2, the sliding rod and the placement plate, can pre-tighten the rotor by the weight of the rotor itself when installing it. Through this setting, the rotor can be preliminarily pre-tightened and positioned to prevent the rotor from being finally fixed. Once the positioning is found to be inaccurate, it will be difficult to adjust, which may cause machining errors or rotor scrapping, further reducing the working efficiency of the drilling device.

[0015] 2. The drilling device for motor rotor processing can adjust the friction between the installed rotor surfaces by adjusting the cooperation between the threaded barrel, the hollow threaded rod, the plastic ferrule and the ratchet assembly. This arrangement realizes secondary fixation under the adjustment of the friction force, preventing the rotor from easily following the synchronous rotation due to insufficient friction when turning the hole, thereby further improving the operability of the hole turning device.

[0016] 3. The motor rotor drilling device can move upward toward the installed rotor through the cooperation between the driving mechanism, the cylinder, and the connecting plate. This arrangement allows the rotor and the drilling head to be squeezed and finally fixed, preventing shaking problems caused by insufficient clamping force, thereby further improving the working quality of the drilling device.

[0017] The parts not involved in the device are the same as the prior art or can be implemented by the prior art. The present invention can perform preliminary pre-tightening and positioning processing on the rotor to prevent the rotor from being finally fixed. Once the positioning is found to be inaccurate, it will be difficult to adjust, which may cause processing errors or rotor scrapping. At the same time, secondary fixation is performed under adjusted friction force. Finally, the rotor and the hole turning head can be squeezed and finally fixed to prevent shaking problems caused by insufficient clamping force, thereby further improving the working quality of the hole turning device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the structure of a drilling device for machining a motor rotor proposed by the present invention; Figure 2 A schematic diagram of the structure of a pre-tightening mechanism of a drilling device for machining a motor rotor proposed by the present invention; Figure 3 This is a schematic cross-sectional structure diagram of a pre-tightening mechanism of a drilling device for machining a motor rotor proposed by the present invention; Figure 4 A drilling device for machining a motor rotor proposed by the present invention Figure 3 The enlarged structural diagram at A in the middle; Figure 5 This is a schematic diagram of the disassembled structure of the adjustment mechanism of a drilling device for machining a motor rotor proposed by the present invention; Figure 6 A schematic diagram of the cutaway structure of a workbench of a drilling device for machining a motor rotor proposed by the present invention; Figure 7 A schematic diagram of the structure of a ratchet assembly of a drilling device for machining a motor rotor proposed by the present invention; Figure 8 The present invention is a schematic diagram of the structure of the clamping claws of a drilling device for machining a motor rotor.

[0019] In the figure: 1. workbench; 2. hole turning machine; 3. pre-tightening mechanism; 31. support cylinder 1; 32. support cylinder 2; 33. sliding rod; 34. placement plate; 35. clamping claw; 351. support rod; 352. rotating rod; 353. linkage rod; 354. adjusting clamp block; 36. reset spring; 4. adjusting mechanism; 41. adjusting threaded cylinder; 42. hollow threaded rod; 43. plastic ferrule; 44. ratchet assembly; 441. inner disk; 442. mounting groove; 443. ratchet; 444. torsion spring; 45. outer disk; 5. driving mechanism; 51. cylinder; 52. connecting plate; 6. ejector rod. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0022] In one embodiment, reference Figure 1-Figure 8 A drilling device for processing a motor rotor comprises a workbench 1, and a drilling machine 2 fixedly connected to the top of the workbench 1, and also comprises: a pre-tightening mechanism 3, arranged directly below the drilling machine 2, for pre-tightening the motor rotor; an adjusting mechanism 4, arranged inside the drilling machine 2, for adjusting the motor rotor during clamping; a driving mechanism 5, fixed directly below the top of the workbench 1, for connecting and adjusting the side wall of the pre-tightening mechanism 3; an ejector rod 6, fixed directly above the workbench 1, and located directly below the pre-tightening mechanism 3.

[0023] By adopting such a solution, the workbench 1 can respectively support the preload mechanism 3, the preload mechanism 3 driving mechanism 5 and the ejector rod 6, thereby ensuring the stable performance of the rotor during operation and preventing vibration problems caused by insufficient stability.

[0024] During the specific operation, the rotor to be processed is placed on the pre-tightening mechanism 3, and then the pre-tightening mechanism 3 can be driven by the weight of the rotor itself to position and pre-tighten the rotor. Under the drive of the pre-tightening mechanism 3, the adjusting mechanism 4 can be driven to work synchronously to rotate the rotor in one direction. Then, the friction between the adjusting mechanism 4 and the rotor can be increased under the drive of the adjusting mechanism 4, so as to achieve secondary fixation. At this time, the driving mechanism 5 on the top of the workbench 1 can control the clamped rotor to be located at the bottom of the drilling machine 2, and the driving mechanism 5 continues to move upward to make it The hole turning machine 2 can apply pressure to the top of the rotor, so that the pre-tightening mechanism 3 can be driven again to finally fix the rotor, and then the hole turning work can be carried out on the top of the rotor under the drive of the hole turning machine 2. When the turning is completed, the friction between the adjusting mechanism 4 and the rotor is first released, and then the driving mechanism 5 is moved downward so that the pre-tightening mechanism 3 can contact the ejection rod 6. Under the supporting force of the driving mechanism 5, a thrust can be applied to the bottom of the adjusting mechanism 4, and the adjusting mechanism 4 synchronously drives the pre-tightening mechanism 3 to move upward, so that the constraint force on the rotor surface can be automatically released, thereby improving work efficiency.

[0025] In one embodiment, reference Figure 1 , Figure 2 , Figure 3 , Figure 6 and Figure 8 A drilling device for motor rotor processing includes a workbench 1 and a drilling machine 2 fixedly connected to the top of the workbench 1, and also includes: a pre-tightening mechanism 3, which is arranged just below the drilling machine 2 and is used for pre-tightening the motor rotor; an adjusting mechanism 4, which is arranged inside the drilling machine 2 and is used for adjusting the motor rotor during clamping; a driving mechanism 5, which is fixed just below the top of the workbench 1 and is used for connecting and adjusting the side wall of the pre-tightening mechanism 3; an ejector rod 6, which is fixed just above the workbench 1 and is located just below the pre-tightening mechanism 3, and the pre-tightening mechanism 3 includes a support cylinder 1 31 located just below the drilling machine 2, the top of the support cylinder 1 31 is fixedly connected to a support cylinder 2 32, the interior of the support cylinder 2 32 is slidably connected to a sliding rod 33, and the top of the sliding rod 33 A placement plate 34 is fixedly connected, and a clamping claw 35 is rotatably connected to the bottom of the placement plate 34 through a rotating shaft. The clamping claw 35 is used to pre-tighten the motor rotor. The clamping claw 35 includes a support rod 351 fixed to the top of the support tube 32, and the interior of the support rod 351 is rotatably connected to a rotating rod 352 through a rotating shaft. One end of the rotating rod 352 is rotatably connected to a linkage rod 353 through a rotating shaft, and the other end of the linkage rod 353 is rotatably connected to the bottom of the placement plate 34 through a rotating shaft, and the other end of the rotating rod 352 is rotatably connected to an adjusting clamp 354 through a rotating shaft, and a rubber pad is fixedly connected to the surface of the adjusting clamp 354, and a reset spring 36 is sleeved on the surface of the sliding rod 33, and the two ends of the reset spring 36 are respectively fixedly connected to the placement plate 34 and the placement plate 34.

[0026] By adopting such a scheme, through the setting of the pre-tightening mechanism 3, when the rotor is placed on the top of the placement plate 34, it is placed in the sliding rod 33 through the rotor driving shaft, and then the iron core position on the rotor surface is located above the placement plate 34. At this time, under the weight of the rotor itself, the placement plate 34 can drive the plastic sleeve 43 to move downward. When the placement plate 34 moves downward, the rotor surface can be initially positioned and pre-tightened. After the pre-tightening treatment, the position of the rotor can be adjusted to make it consistent with the rotation center of the hole turning machine 2, thereby laying the foundation for subsequent precise processing. If the final fixation is directly performed without pre-tightening treatment, once the positioning is found to be inaccurate, it will be difficult to adjust, which may cause processing errors or rotor scrapping.

[0027] During specific operation, the setting of the support cylinder 1 31 and the support cylinder 2 32 allows the sliding rod 33 to be guided and limited, and then the setting of the placement plate 34 on the top of the sliding rod 33 allows the rotor to be placed. Since the rotor is generally composed of components such as a rotating shaft and an iron core, the end of the rotating shaft can be located inside the sliding rod 33, and the iron core can be located on the placement plate 34. Then, the placement plate 34 can drive the sliding rod 33 to move downward through the weight of the rotor itself. The downward movement of the placement plate 34 can synchronously drive the clamping claw 35 to be tightened, so as to position and pre-tighten the rotor surface. Under the elastic force of the reset spring 36, the sliding rod 33 and the support cylinder 2 32 can be supported and protected to avoid direct contact that is prone to wear between each other. At the same time, under the elastic force of the reset spring 36, the sliding rod 33 and the support cylinder 2 32 can be better reset in the later stage. When the clamping claw 35 is working, since the support rod 351 is fixed on the surface of the support tube 32, the support rod 351 will not change. Then, the support rod 351 is used to connect the rotating rod 352. When the placement plate 34 moves downward, the bottom linkage rod 353 will be expanded outward. When the linkage rod 353 expands outward, it drives one end of the rotating rod 352 to expand outward, while the other end of the rotating rod 352 is tightened inward. When the clamping claw 35 is set in multiple groups, it can simultaneously position and pre-tighten multiple surfaces of the rotor surface.

[0028] In one embodiment, reference Figure 4 , Figure 5 , Figure 7 and Figure 8A drilling device for motor rotor processing includes a workbench 1 and a drilling machine 2 fixedly connected to the top of the workbench 1, and also includes: a pre-tightening mechanism 3, which is arranged directly below the drilling machine 2 and is used to pre-tighten the motor rotor; an adjusting mechanism 4, which is arranged inside the drilling machine 2 and is used to adjust the motor rotor during clamping; a driving mechanism 5, which is fixed directly below the top of the workbench 1 and is used to connect and adjust the side wall of the pre-tightening mechanism 3; an ejector rod 6, which is fixed directly above the workbench 1 and located directly below the pre-tightening mechanism 3, and the adjusting mechanism 4 includes an adjusting threaded cylinder 41 that rotates on the surface of a sliding rod 33 through a bearing, and the internal thread of the adjusting threaded cylinder 41 is connected to a hollow threaded rod 42, and the end of the hollow threaded rod 42 is slidably connected to the sliding rod 33 The inner wall, the interior of the hollow threaded rod 42 is fitted with a plastic sleeve 43, the end of the plastic sleeve 43 is fixed in the sliding rod 33, the end of the hollow threaded rod 42 is fixedly connected with a ratchet assembly 44, and a matching outer disk 45 is provided at the bottom of the ratchet assembly 44. The circumference of the inner wall of the outer disk 45 is provided with a tooth groove, and the outer disk 45 is fixed to the inner wall of the support tube 31. The ratchet assembly 44 includes an inner disk 441 fixed to the end of the hollow threaded rod 42, and the bottom of the inner disk 441 is provided with a mounting groove 442. The interior of the mounting groove 442 is rotatably connected with a ratchet 443 through a rotating shaft. The interior of the mounting groove 442 is fixedly connected with a torsion spring 444, and one end of the torsion spring 444 is fitted on the surface of the ratchet 443. A through groove is provided inside the hollow threaded rod 42, and the through groove is conically set.

[0029] By adopting such a scheme, under the setting of the adjustment mechanism 4, the rotor surface after the rotor is pre-tightened can be adjusted and fixed for the second time. Under the rotation of the adjustment threaded cylinder 41, the hollow threaded rod 42 can be controlled to move upward inside the sliding rod 33. When the hollow threaded rod 42 moves upward, it can contact the surface of the plastic sleeve 43. As the hollow threaded rod 42 continues to move upward, it can gradually squeeze the plastic sleeve 43 inward, so that the plastic sleeve 43 is tightly fitted to the surface of the rotor, thereby fixing the rotor surface for the second time again.

[0030] During specific operation, after the rotor is installed on the pre-tightening mechanism 3 and pre-tightened, the sliding rod 33 will drive the hollow threaded rod 42 to move downward. When the hollow threaded rod 42 moves downward, the ratchet assembly 44 fixed at the bottom of the hollow threaded rod 42 can be located inside the outer disk 45, so that the sliding rod 33 can be limited. At this time, by adjusting the clockwise rotation of the threaded cylinder 41, the hollow threaded rod 42 can be adjusted upward. When the hollow threaded rod 42 is adjusted upward, the plastic sleeve 43 fixed inside the sliding rod 33 can be squeezed inward. Since the rotor drive shaft is located in the plastic sleeve 43, when the hollow threaded rod 42 continues to move upward, a through groove is opened inside the hollow threaded rod 42. The through groove is set in a conical shape, so that it can gradually squeeze the plastic sleeve 43 inward, thereby increasing the friction force of the rotor drive shaft for secondary fixation; When the ratchet assembly 44 is located inside the outer disk 45, it can only rotate in one direction. In order to ensure that the hollow threaded rod 42 can move upward normally, it is necessary to adjust the ratchet assembly 44 to rotate clockwise synchronously. The ratchet assembly 44 rotates clockwise so that the inner disk 441 can rotate synchronously. The rotation of the inner disk 441 can respectively drive the ratchet teeth 443 and the torsion spring 444 inside the installation groove 442 to rotate synchronously. The ratchet teeth 443 rotate clockwise and can gradually enter different tooth grooves inside the outer disk 45. Then, the ratchet teeth 443 can be reset in time by the torsion spring 444 to prevent the torsion spring 444 from rotating counterclockwise. Under the one-way clockwise rotation, the staff can rotate the adjusting threaded cylinder 41 with more effort. When the hole-turning machine 2 rotates the top of the rotor counterclockwise, the rotor may rotate counterclockwise synchronously due to the counterclockwise rotation force of the hole-turning machine 2. At this time, the ratchet assembly 44 is clamped inside the outer disk 45, so that it can provide additional reaction force to the fixed rotor to offset the rotation force brought by the counterclockwise rotation, thereby ensuring the stability of the rotor processing and hole-turning project. When the hollow threaded rod 42 needs to be moved downward to reset the plastic sleeve 43, the placement plate 34 can be automatically reset without pressure, thereby driving the ratchet assembly 44 to separate from the outer disk 45, so that it can be switched to a free rotation state for rotation at any angle.

[0031] It is additionally explained that the one-way rotation modes of the ratchet assembly 44 and the outer disc 45 are arranged in opposite directions according to the rotation direction of the hole-turning machine 2, so as to achieve the problem of mutual force offset.

[0032] In one embodiment, reference Figure 1 , Figure 6 and Figure 8The driving mechanism 5 includes a cylinder 51 fixed just below the top of the workbench 1, and the output end of the cylinder 51 is connected to a connecting plate 52, which is fixed to the bottom of the supporting cylinder 31.

[0033] By adopting such a scheme, the driving mechanism 5 can control the pre-tightening mechanism 3 to adjust up and down. When the pre-tightening mechanism 3 moves upward, the top of the rotor clamped by the pre-tightening mechanism 3 can be attached to the bottom of the hole-turning machine 2. Then, the driving mechanism 5 continues to move, so that it can apply pressure again to the hole-turning machine 2 and the top of the rotor pre-tightened by the pre-tightening mechanism 3. Therefore, when the rotor moves downward, pressure can be applied to the top of the placement plate 34 again, so as to drive the outer disk 45 to be clamped more firmly on the rotor surface for limiting.

[0034] During specific operation, the cylinder 51 included in the driving mechanism 5 is driven to control the connecting plate 52 to adjust up and down. When the connecting plate 52 moves upward, the pre-tightening mechanism 3 and the adjusting mechanism 4 can be synchronously driven to move synchronously, so that the top of the rotor pre-tightened by the pre-tightening mechanism 3 is in contact with the hole-turning machine 2. As the cylinder 51 continues to move upward, the hole-turning machine 2 will exert pressure on the top of the rotor. When the top of the rotor is under pressure, the weight of the rotor will increase again, thereby driving the clamping claw 35 to fix the placement plate 34 again, so as to finally fix the rotor surface. When the rotor is fixed, when the cylinder 51 continues to move upward, the hole-turning machine 2 is driven to rotate at the same time to perform hole-turning work on the top of the rotor. The cylinder 51 continues to move upward, which can control the depth of the hole-turning on the top of the rotor.

[0035] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A drilling device for machining a motor rotor, comprising a workbench (1), and a drilling machine (2) fixedly connected to the top of the workbench (1), characterized in that: Also includes: A pre-tightening mechanism (3) is arranged directly below the hole-turning machine (2) and is used to pre-tighten the motor rotor; An adjustment mechanism (4) is arranged inside the hole turning machine (2) and is used to adjust the motor rotor during clamping; A driving mechanism (5) is fixed just below the top of the workbench (1) and is used to connect and adjust the side wall of the pre-tightening mechanism (3); The ejector rod (6) is fixed just above the workbench (1) and is located just below the preload mechanism (3).

2. A drilling device for machining a motor rotor according to claim 1, characterized in that: The pre-tightening mechanism (3) comprises a support cylinder 1 (31) located directly below the hole-turning machine (2); the top of the support cylinder 1 (31) is fixedly connected to a support cylinder 2 (32); the interior of the support cylinder 2 (32) is slidably connected to a sliding rod (33); the top of the sliding rod (33) is fixedly connected to a placement plate (34); the bottom of the placement plate (34) is rotatably connected to a clamping claw (35) via a rotating shaft; the clamping claw (35) is used to pre-tighten the motor rotor.

3. The drilling device for machining a motor rotor according to claim 1, characterized in that: The adjusting mechanism (4) comprises an adjusting threaded barrel (41) which rotates on the surface of the sliding rod (33) via a bearing, the internal thread of the adjusting threaded barrel (41) being connected to a hollow threaded rod (42), the end of the hollow threaded rod (42) being slidably connected to the inner wall of the sliding rod (33), the interior of the hollow threaded rod (42) being fitted with a plastic sleeve (43), the end of the plastic sleeve (43) being fixed in the sliding rod (33).

4. A drilling device for machining a motor rotor according to claim 1, characterized in that: The driving mechanism (5) comprises a cylinder (51) fixed just below the top of the workbench (1), the output end of the cylinder (51) being connected to a connecting plate (52), and the connecting plate (52) being fixed to the bottom of the supporting cylinder (31).

5. The drilling device for machining a motor rotor according to claim 3, characterized in that: The end of the hollow threaded rod (42) is fixedly connected to a ratchet assembly (44), and a matching outer disc (45) is provided at the bottom of the ratchet assembly (44). The inner wall of the outer disc (45) is provided with tooth grooves on its circumference, and the outer disc (45) is fixed to the inner wall of the support tube (31).

6. A drilling device for machining a motor rotor according to claim 5, characterized in that: The ratchet assembly (44) comprises an inner disk (441) fixed to the end of a hollow threaded rod (42); a mounting groove (442) is provided at the bottom of the inner disk (441); a ratchet (443) is rotatably connected to the inside of the mounting groove (442) via a rotating shaft; a torsion spring (444) is fixedly connected to the inside of the mounting groove (442); one end of the torsion spring (444) is attached to the surface of the ratchet (443).

7. A drilling device for machining a motor rotor according to claim 2, characterized in that: The clamping claw (35) comprises a support rod (351) fixed to the top of the second support cylinder (32); the interior of the support rod (351) is rotatably connected to a rotating rod (352) via a rotating shaft; one end of the rotating rod (352) is rotatably connected to a linkage rod (353) via a rotating shaft; the other end of the linkage rod (353) is rotatably connected to the bottom of the placement plate (34) via a rotating shaft.

8. The drilling device for machining a motor rotor according to claim 7, characterized in that: The other end of the rotating rod (352) is rotatably connected to an adjusting clamp block (354) via a rotating shaft, and a rubber pad is fixedly connected to the surface of the adjusting clamp block (354).

9. The drilling device for machining a motor rotor according to claim 2, characterized in that: A return spring (36) is sleeved on the surface of the sliding rod (33), and two ends of the return spring (36) are respectively fixedly connected to the placement plate (34) and the placement plate (34).

10. The drilling device for machining a motor rotor according to claim 3, characterized in that: A through groove is provided inside the hollow threaded rod (42), and the through groove is conical.

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