Motor end cover drilling tool

Abstract

The invention belongs to the technical field of motor end cover machining, and discloses a motor end cover drilling tool which comprises a rack, a drill bit is arranged on the rack, a first moving frame capable of transversely moving is arranged on the rack, a supporting pipe is fixedly connected to the first moving frame, the supporting pipe is rotationally sleeved with a supporting disc, and a lantern ring is transversely and slidably connected to one side of the supporting pipe. One side of the supporting pipe communicates with an air inlet pipe, a movable pipe is slidably connected into the supporting pipe, vent holes are formed in the movable pipe, a first pipeline and a second pipeline which can communicate with the movable pipe are arranged in the supporting disc, and centering blocks are slidably arranged at the tail ends of the first pipeline and the second pipeline; the moving pipe is fixedly connected with a push rod, the side, away from the air inlet pipe, of the supporting pipe is slidably connected with a supporting block, the push rod can push the supporting block to move in the radial direction of the supporting pipe, and the supporting block is fixedly connected with an extrusion block capable of pushing the end cover. The drilling device has the effect of improving the drilling quality and efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of motor end cover processing, and in particular to a motor end cover drilling tool. Background Art

[0002] The three-phase asynchronous motor is a kind of motor used in industry and daily life. It is powered by a three-phase AC power supply and realizes rotational motion through the principle of electromagnetic induction. The three-phase asynchronous motor is a type of motor that is powered by 380V three-phase AC with a phase difference of 120 degrees. Since the rotor and stator rotating magnetic fields of the three-phase asynchronous motor rotate in the same direction and at different speeds, there is a slip rate, so it is called a three-phase asynchronous motor.

[0003] During the assembly process of the motor, the motor end cover plays a role of protection and sealing. In order to ensure the fixation and installation of the end cover and other components, it is usually necessary to drill holes on the motor end cover. The holes on the side of the end cover are used to install screws, brackets and other components, and drilling tools are required in the drilling process.

[0004] Reference Figure 1 When drilling holes in the existing motor end cover, the motor end cover is first placed on the drilling tool, and then the worker manually supports the motor end cover and drills the hole. After the drilling is completed, the drilling tool is rotated to rotate the motor end cover and drill the hole again. Referring to the Chinese patent document with the announcement number CN222344266U, a three-phase asynchronous motor end cover drilling device is disclosed, which determines the drilling position by a laser spotlight and clamps and fixes the end cover by a clamping mechanism.

[0005] With respect to the above-mentioned related technologies, during the drilling process, after placing the motor end cover on the drilling tool, the workers need to continuously adjust the position of the motor end cover before drilling, which will affect the quality of the motor end cover. Then, the above process is repeated to drill the remaining drilling positions of the motor end cover, which is not conducive to improving efficiency. In addition, the patent document uses a laser spotlight to determine the drilling position, and it is necessary to continuously adjust the end cover position and cooperate with the laser spotlight to determine the drilling position, which is also not conducive to improving work efficiency. Summary of the invention

[0006] In view of this, the present invention provides a motor end cover drilling tool, aiming to solve the problems of inaccurate positioning and low efficiency of the motor end cover in the prior art.

[0007] In order to solve the above technical problems, the present invention provides a motor end cover drilling tool, comprising a frame, the frame is provided with a drill bit for drilling holes in the end cover, the frame is provided with a movable frame that can move laterally, the movable frame is fixedly connected with a support tube, a support plate is rotatably sleeved on the outside of the support tube, and a collar is laterally slidably connected to one side of the support tube; one side of the support tube is connected to an air intake pipe, a movable tube is slidably connected inside the support tube, a vent is provided on the movable tube, a first pipeline and a second pipeline that can be connected to the movable tube are provided in the support plate, and centering blocks are slidably provided at the ends of the first pipeline and the second pipeline; the movable tube is fixedly connected with a push rod, and a support block is slidably connected to the side of the support tube away from the air intake pipe, the push rod can push the support block to move along the radial direction of the support tube, and an extrusion block that can push the end cover is fixedly connected to the support block.

[0008] By adopting the above technical solution, when drilling a hole in the motor end cover, first the sleeve ring is inserted into the center hole of the motor end cover, the motor pushes the sleeve ring to move, then airflow is introduced into the air intake pipe, the airflow enters the moving tube, and enters the first pipeline through the moving tube, and then the airflow pushes the centering block to move, with the movement of the centering blocks on both sides, the two centering blocks can push the reinforcing ribs of the motor end cover and center them, so as to facilitate drilling of the reinforcing ribs of the motor end cover and improve the accuracy of the drilling position; then the air intake pipe is continuously supplied with air, the airflow will push the moving tube to move, and the movement of the moving tube can drive the pusher The rod moves, and the push rod will abut against the support block during the movement, and then push the support block to move in the radial direction of the motor end cover, so as to abut the motor end cover and improve the stability when drilling it. The support block can drive the extrusion block to move together when moving, and the extrusion block abuts against the motor end cover and pushes the motor end cover to move, so as to achieve axial positioning of the motor end cover; the motor end cover can be positioned with the cooperation of the centering block and the extrusion block to ensure the accuracy of the drilling position of the motor end cover, and there is no need for the staff to frequently adjust the position of the motor end cover, which is beneficial to improving its processing efficiency.

[0009] Optionally, a first rotation source is fixedly installed on the frame, a movable frame 2 is vertically slidably connected to the frame, the first rotation source can drive the movable frame 2 to move, a second rotation source is installed on the movable frame 2, a driving shaft of the second rotation source is fixedly connected to a collet, and the drill bit is arranged on the collet.

[0010] By adopting the above technical solution, when the drill bit needs to drill a hole in the motor end cover, the drill bit can be moved in the vertical direction through the cooperation of the first rotation source and the movable frame 2, and the drill bit can be rotated through the second rotation source to facilitate drilling the motor end cover.

[0011] Optionally, a push plate is provided under the collet, a return spring is fixedly connected between the push plate and the bottom of the collet, a push frame is vertically slidably connected to the top of the movable frame, a limiting rod is horizontally slidably connected to the movable frame, and a limiting hole matching the limiting rod is opened on the support plate.

[0012] By adopting the above technical solution, when the drilling position needs to be quickly adjusted, the side of the limiting rod close to the support disk is set to a hemispherical shape. When the support disk is rotated, one end of the hemispherical limiting rod can extend into the limiting hole. At this time, the position of the motor end cover can be preliminarily adjusted to facilitate the subsequent precise positioning of the motor end cover, which is beneficial to improving work efficiency; when the drilling is completed, the supporting disk can be rotated to retract the limiting rod. When the spherical end of the limiting rod enters the limiting hole again, the rotation is stopped, and the next drilling position can be preliminarily positioned to facilitate improving the drilling efficiency.

[0013] Optionally, the outer side wall of the limiting rod is fixedly connected with a support plate, and a second return spring is fixedly connected between the support plate and the movable frame.

[0014] By adopting the above technical solution, the arrangement of the support plate and the return spring can enable the limiting rod to be extended and retracted along the axial direction of the support plate, so as to quickly achieve the initial positioning of the motor end cover.

[0015] Optionally, a support frame is fixedly connected to the frame, and a third rotation source is fixedly connected to the support frame, and the third rotation source can drive the movable frame to move horizontally.

[0016] By adopting the above technical solution, the position of the movable frame 1 can be adjusted by starting the third rotation source to reduce the error generated after the equipment is used for a long time, thereby ensuring the quality of the product.

[0017] Optionally, the pushing frame includes a pressure plate and an extrusion rod. The pressure plate is vertically slidably connected to the top of the movable frame one. A return spring three is fixedly connected between the pressure plate and the movable frame one. The extrusion rod is fixedly connected to one side of the pressure plate. When the extrusion rod moves downward, it can squeeze the limiting rod to move horizontally.

[0018] By adopting the above technical solution, the push plate abuts against the pressure plate during the downward movement, and then the push plate pushes the pressure plate to move downward. The pressure plate moves downward and drives the extrusion rod to move downward. During the downward movement of the extrusion rod, it abuts against the limiting rod and pushes the limiting rod to move into the limiting hole.

[0019] Optionally, a pressure surface one is provided on the side of the push rod close to the support block, a pressure surface one matching the pressure surface is provided on the support block, a pressure surface two is provided at the bottom of the extrusion rod, a pressure surface two is provided on one side of the limiting rod, and a pressure surface three is provided on the extrusion block. When the pressure surface one pushes the pressure surface one, the support block can be moved to press against the end cover tightly, and when the pressure surface two pushes the pressure surface two, the limiting rod can be moved into the limiting hole, and the pressure surface three can push the end cover to move.

[0020] By adopting the above technical scheme, the cooperation between pressure-applying surface one and pressure-receiving surface one can realize the movement of the support block away from the central axis of the support tube when the push rod moves in the horizontal direction. The cooperation between pressure-applying surface two and pressure-receiving surface two can realize the movement of the limiting rod toward the support disk when the extrusion rod moves downward. The cooperation between pressure-applying surface three and the motor end cover can realize the movement of the motor end cover toward the support disk when the support block moves away from the central axis of the support tube, thereby enabling quick preparation work.

[0021] Optionally, a connecting plate is fixedly connected to one side of the support tube, a return spring four is fixedly connected between the support block and the connecting plate, and a return spring five is fixedly connected between the collar and the support tube.

[0022] By adopting the above technical solution, the setting of reset spring four can reset the support block after drilling is completed, so as to prepare for the next drilling work. The setting of reset spring five can reset the ring after drilling is completed, so as to improve work efficiency.

[0023] Optionally, the driving shaft of the first rotation source is fixedly connected to screw 1, and the movable frame 2 is threadedly connected to screw 1; the driving shaft of the third rotation source is fixedly connected to screw 2, and screw 2 is threadedly connected to movable frame 1.

[0024] By adopting the above technical solution, the movement of the movable frame 2 and the movable frame 1 can be realized through the rotation of the lead screw 1 and the lead screw 2, and it has the advantages of high efficiency and precise positioning.

[0025] Optionally, the drill bit is detachably connected to the collet.

[0026] By adopting the above technical solution, holes of various diameters can be drilled by replacing the drill bit, which is beneficial to improving the applicability of the device.

[0027] In summary, compared with the prior art, the present invention includes at least one of the following beneficial technical effects: 1. The motor end cover can be centered by the airflow to improve the drilling accuracy, and then the airflow is further introduced to tighten the motor end cover. At the same time, the motor end cover can be pushed to move to achieve the axial positioning of the motor end cover, which is conducive to improving the drilling quality; 2. The setting of the limiting rod can facilitate the operator to preliminarily locate the punching position of the motor end cover, so as to facilitate the operation of the staff and improve the work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the structure of the motor end cover; Figure 2 It is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 3 This is a structural schematic diagram of the assembly of the vertical plate and the support plate according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the collar according to an embodiment of the present invention; Figure 5 It is a schematic diagram of the structure of the centering block and the support plate assembled in an embodiment of the present invention; Figure 6 is a cross-sectional view of a support plate according to an embodiment of the present invention; Figure 7 This is a schematic structural diagram of a support block according to an embodiment of the present invention; Figure 8 For the embodiment of the present invention Figure 3 A partial enlarged view of area A in the middle.

[0029] Description of reference numerals: 1, frame; 11, drill bit; 12, moving frame 1; 121, support frame; 122, third rotation source; 123, lead screw 2; 124, vertical plate; 13, support pipe; 131, connecting plate; 132, return spring 4; 14, support plate; 15, collar; 151, return spring 5; 2, air inlet pipe; 21, moving pipe; 22, vent hole; 23, first pipeline; 24, second pipeline; 25, centering block; 26, push rod; 261, pressure surface 1; 27. Support block; 271. Pressure surface one; 28. Extrusion block; 281. Pressure surface three; 3. First rotation source; 31. Moving frame two; 32. Second rotation source; 33. Collet; 34. Lead screw one; 4. Push plate; 41. Return spring one; 42. Push frame; 421. Pressing plate; 422. Extrusion rod; 423. Pressure surface two; 424. Return spring three; 43. Limiting rod; 431. Support plate; 432. Return spring two; 433. Pressure surface two; 44. Limiting hole. DETAILED DESCRIPTION

[0030] To make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the following will be combined with the embodiments of the present invention. Figure 1-Figure 8 , a clear and complete description of the technical solution of the embodiment of the present invention is given.

[0031] Reference Figure 2 , Figure 3 and Figure 4The present invention provides a motor end cover drilling tool, comprising a frame 1, a drill bit 11 for drilling the motor end cover, an air intake pipe 2, an adjustment mechanism for centering the motor end cover, and a positioning mechanism for fixing the motor end cover. The frame 1 is placed on a horizontal plane, and a first rotating source 3 is fixedly installed on the frame 1. In this embodiment, the first rotating source 3 is a motor. In other embodiments, the first rotating source 3 can also be a device whose driving shaft can realize rotation, such as a rotary cylinder or a hydraulic motor. The driving shaft of the first rotating source 3 is fixedly connected to a lead screw 1 34, and the lead screw 1 34 is threadedly connected to a movable frame 2 31. A second rotating source 32 is fixedly installed on the movable frame 2 31, and a drive shaft of the second rotating source 32 is fixedly connected to a collet 33. The drill bit 11 is detachably connected to the collet 33 to facilitate its replacement. The adjustment mechanism and the positioning mechanism can be operated by introducing airflow into the air intake pipe 2. A support frame 121 is fixedly connected to the frame 1, a third rotation source 122 is fixedly installed on the support frame 121, a driving shaft of the third rotation source 122 is fixedly connected to a lead screw 123, the lead screw 123 is threadedly connected to a movable frame 12 that can be slid laterally, a vertical plate 124 is fixedly connected to the movable frame 12, a support tube 13 is fixedly connected to the movable frame 12, a support plate 14 is rotatably sleeved on the outside of the support tube 13, a collar 15 for inserting the center hole of the motor end cover is slidably connected to the side of the support plate 14 away from the intake pipe 2, a reset spring 5 151 is fixedly connected between the collar 15 and the support tube 13 to achieve reset of the collar 15.

[0032] When it is necessary to drill a hole in the motor end cover, first insert the ring 15 into the center hole of the motor end cover, and push the ring 15 to move in the direction close to the air inlet pipe 2, then introduce air into the air inlet pipe 2, and then the adjustment mechanism starts to work to center the motor end cover, and then continue to introduce air flow, and the positioning mechanism starts to work to position and fix the motor end cover; then start the second rotation source 32 to drive the collet chuck 33 to rotate, and the drill bit 11 rotates with the collet chuck 33, and then start the first rotation source 3 to drive the screw 1 34 to rotate, and the rotation of the screw 1 34 can drive the movable frame 2 31 to move downward, so that the drill bit 11 drills a hole in the motor end cover.

[0033] Reference Figure 3 , Figure 5 and Figure 6The adjusting mechanism includes a moving tube 21, a vent 22, a first pipeline 23, a second pipeline 24 and a centering block 25; the moving tube 21 is slidably connected to the support tube 13 in a transverse direction, and a vent 22 is provided on the tube wall of the moving tube 21. The first pipeline 23 and the second pipeline 24 are both provided in the support plate 14, and the first pipeline 23 is connected to the second pipeline 24. A hole is provided on the support tube 13 to connect the moving tube 21 with the first pipeline 23 and the second pipeline 24. Two centering blocks 25 are provided, and are respectively provided at the ends of the first pipeline 23 and the second pipeline 24. Restriction rings are provided in the first pipeline 23 and the second pipeline 24 to limit the movement of the centering block 25. The centering block 25 can be reset by providing a reset spring between the restriction ring and the centering block 25.

[0034] When the motor end cover needs to be centered, air flow is introduced into the air inlet pipe 2, the air flow enters the support tube 13 and flows into the moving tube 21, and then the air flow flows from the vent 22 to the first pipeline 23 and the second pipeline 24. As the air flow flows, the air flow pushes the centering block 25 to move, and the centering block 25 will abut against the reinforcement ribs of the motor end cover during the movement, and then the centering block 25 pushes the reinforcement ribs of the motor end cover and rotates the motor end cover, so as to facilitate the adjustment of the drilling position of the motor end cover, thereby facilitating the drilling of the reinforcement ribs of the motor end cover.

[0035] Reference Figure 3 and Figure 7 The fixing mechanism includes a push rod 26, a support block 27 and an extrusion block 28. The push rod 26 is fixedly connected to the side of the moving tube 21 away from the intake pipe 2. The support block 27 is vertically slidably connected to the support tube 13. The side of the support tube 13 away from the intake pipe 2 is fixedly connected with a connecting plate 131. A return spring 132 is fixedly connected between the support block 27 and the connecting plate 131 to achieve the reset of the support block 27. In this embodiment, three support blocks 27 are provided. In other embodiments, the number can be selected according to actual needs. A pressure surface 261 is provided on the side of the push rod 26 close to the support block 27. The pressure surface 261 is a conical surface. The support block 2 A pressure surface 1 271 is provided on the side close to the push rod 26, and the pressure surface 1 271 is set as an arc surface. When the push rod 26 moves in the direction close to the support block 27, the push rod 26 can push the support block 27 to move it along the radial direction of the support tube 13. The extrusion block 28 is fixed on the side wall of the support block 27, and a pressure surface 3 281 is provided on the side wall of the extrusion block 28 close to the push rod 26. When the support block 27 moves, it can press the electric end cover tightly to fix the electric motor end cover, and at the same time, the pressure surface 3 281 can push the electric motor end cover to move along the axial direction of the support tube 13 to achieve the axial positioning of the electric motor end cover.

[0036] When the motor end cover needs to be fixed and positioned, with the continuous flow of airflow through the intake pipe 2, the airflow can push the movable tube 21 to move, and the movable tube 21 can drive the push rod 26 to move during the movement, and the push rod 26 pushes the support block 27 to move during the movement. With the movement of the support block 27, the three support blocks 27 cooperate with each other to fix the position of the motor end cover, and at the same time, the extrusion block 28 moves with the support block 27, and can push the motor end cover to move in the direction close to the support disk 14 through the pressure surface three 281, so as to realize the axial positioning of the motor end cover, which is beneficial to drilling the motor end cover.

[0037] Reference Figure 3 and Figure 8 A return spring 41 is fixedly connected to the bottom of the collet 33, and the return spring 41 surrounds the outside of the drill bit 11. A push plate 4 is fixedly connected to the bottom of the return spring 41, and a hole is provided at the center of the push plate 4 to facilitate the movement of the drill bit 11. A push frame 42 is vertically slidably connected to the top of the vertical plate 124. The push frame 42 includes a pressure plate 421 and an extrusion rod 422. The pressure plate 421 is slidably connected to the top of the vertical plate 124. A return spring 3 424 is fixedly connected between the pressure plate 421 and the vertical plate 124. A hole for the drill bit 11 to pass through is provided on the pressure plate 421. The extrusion rod 422 is fixedly connected to the bottom wall of the pressure plate 421 and extends in the vertical direction. A pressure surface 423 is provided at the bottom of the extrusion rod 422, and the pressure surface 423 is set to an inclined surface. A limiting rod 43 is horizontally slidably connected in the vertical plate 124, and the limiting rod 43 is close to the extrusion rod A second pressure surface 433 is provided on one side of 422, and the second pressure surface 433 is set as an inclined surface. The extrusion rod 422 can abut against the limiting rod 43 during the downward movement. As the extrusion rod 422 continues to move, under the action of the second pressure surface 423 and the second pressure surface 433, the extrusion rod 422 can push the limiting rod 43 to move toward the direction close to the support plate 14. The side of the limiting rod 43 close to the support plate 14 is set in a hemispherical shape and extends out of the vertical plate 124. A limiting hole 44 compatible with the limiting rod 43 is provided on the support plate 14. In this embodiment, three limiting holes 44 are set to provide for drilling three reinforcing ribs of the motor end cover. The outer wall of the limiting rod 43 is fixedly connected to the support plate 431, and a second return spring 432 is fixedly connected between the support plate 431 and the movable frame to realize the extension and retraction of the limiting rod 43.

[0038] When it is necessary to facilitate the staff to determine the drilling position, after the motor end cover is placed on the tooling, the support plate 14 is rotated, and the motor end cover can rotate together with the support plate 14. When the limiting rod 43 enters the limiting hole 44, the rotation of the support plate 14 is stopped. At this time, the drilling position of the motor end cover can be preliminarily located, so as to facilitate the adjustment of the position of the motor end cover, which is beneficial to the positioning and drilling of the motor end cover in the subsequent process; when drilling the motor end cover, the extrusion rod 422 moves downward to push the limiting rod 43 to move, and the limiting rod 43 enters the limiting hole 44 to improve the stability during drilling; when it is necessary to switch the drilling position, the support plate 14 is rotated, and the support plate 14 can squeeze the spherical part of the limiting rod 43 and shrink the limiting rod 43, and then the support plate 14 is rotated. After the support plate 14 rotates until the spherical part of the limiting rod 43 enters the limiting hole 44, the support plate 14 stops rotating, and then drilling continues, so as to facilitate the operation of the operator and improve work efficiency.

[0039] The implementation principle of a motor end cover drilling tool in an embodiment of the present invention is: first, the motor end cover is placed on the ring 15 and the ring 15 is pushed to move, then the support plate 14 is rotated to make the spherical part of the limiting rod 43 extend into the limiting hole 44 on the support plate 14, and then air is introduced into the intake pipe 2, the airflow enters the support pipe 13 and enters the moving pipe 21, and then the airflow enters the first pipeline 23 and the second pipeline 24 through the through hole, and pushes the centering block 25 to move. During the movement, the centering block 25 can push the reinforcing ribs of the motor end cover to center the motor end cover.

[0040] Then, air flow is continuously introduced into the air intake pipe 2, and the air flow can push the moving tube 21 to move. During the movement of the moving tube 21, the push rod 26 can move together. During the movement, the push rod 26 can push the support block 27 to move. During the movement, the support block 27 can tighten the motor end cover. At the same time, the support block 27 can drive the extrusion block 28 to push the motor end cover to move, so as to achieve axial positioning of the motor end cover. Then, the motor end cover is drilled by the drill bit 11. During the downward movement of the drill bit 11, the push plate 4 is driven to move downward together. During the downward movement of the push plate 4, the pressure plate 421 can be pushed downward to move. During the downward movement of the pressure plate 421, the extrusion rod 422 is driven to push the limiting rod 43 to extend into the limiting hole. Then the drill bit 11 drills the motor end cover. Finally, the above process is repeated to drill holes in the remaining positions of the motor end cover.

[0041] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A motor end cover drilling tool, comprising a frame (1), wherein the frame (1) is provided with a drill bit (11) for drilling holes in the end cover, wherein: The frame (1) is provided with a movable frame (12) capable of moving laterally, a support tube (13) is fixedly connected to the movable frame (12), a support plate (14) is rotatably sleeved on the outside of the support tube (13), and a collar (15) is slidably connected to one side of the support tube (13) laterally; One side of the support tube (13) is connected to an air inlet tube (2), a movable tube (21) is slidably connected inside the support tube (13), a vent hole (22) is provided on the movable tube (21), a first pipeline (23) and a second pipeline (24) that can be connected to the movable tube (21) are provided inside the support plate (14), and a centering block (25) is slidably provided at the ends of the first pipeline (23) and the second pipeline (24); The movable tube (21) is fixedly connected to a push rod (26); a side of the support tube (13) away from the air inlet tube (2) is slidably connected to a support block (27); the push rod (26) is capable of pushing the support block (27) to move along the radial direction of the support tube (13); and an extrusion block (28) capable of pushing the end cover is fixedly connected to the support block (27).

2. The motor end cover drilling tool according to claim 1, characterized in that: A first rotation source (3) is fixedly mounted on the frame (1), a second moving frame (31) is vertically slidably connected to the frame (1), the first rotation source (3) can drive the second moving frame (31) to move, a second rotation source (32) is mounted on the second moving frame (31), a driving shaft of the second rotation source (32) is fixedly connected to a collet (33), and a drill bit (11) is arranged on the collet (33).

3. The motor end cover drilling tool according to claim 2, characterized in that: A push plate (4) is provided below the collet (33); a return spring (41) is fixedly connected between the push plate and the bottom of the collet (33); a push frame (42) is vertically slidably connected to the top of the movable frame (12); a limiting rod (43) is horizontally slidably connected to the movable frame (12); and a limiting hole (44) matching the limiting rod (43) is provided on the support plate (14).

4. The motor end cover drilling tool according to claim 3, characterized in that: The outer side wall of the limiting rod (43) is fixedly connected to a support plate (431), and a second return spring (432) is fixedly connected between the support plate (431) and the movable frame.

5. The motor end cover drilling tool according to claim 2, characterized in that: The frame (1) is fixedly connected to a support frame (121), and the support frame (121) is fixedly connected to a third rotation source (122), and the third rotation source (122) can drive the movable frame (12) to move horizontally.

6. The motor end cover drilling tool according to claim 3, characterized in that: The push frame (42) comprises a pressing plate (421) and an extrusion rod (422). The pressing plate (421) is vertically slidably connected to the top of the moving frame (12). A return spring (424) is fixedly connected between the pressing plate (421) and the moving frame (12). The extrusion rod (422) is fixedly connected to one side of the pressing plate (421). When the extrusion rod (422) moves downward, it can squeeze the limiting rod (43) to move horizontally.

7. The motor end cover drilling tool according to claim 3, characterized in that: The push rod (26) is provided with a pressure surface 1 (261) on one side close to the support block (27), the support block (27) is provided with a pressure receiving surface 1 (271) matched with the pressure surface, the bottom of the extrusion rod (422) is provided with a pressure surface 2 (423), one side of the limiting rod (43) is provided with a pressure receiving surface 2 (433), and the extrusion block (28) is provided with a pressure surface 3 (281), when the pressure surface 1 (261) pushes the pressure receiving surface 1 (271), the support block (27) can be moved to press against the end cover, when the pressure surface 2 (423) pushes the pressure receiving surface 2 (433), the limiting rod (43) can be moved into the limiting hole (44), and the pressure surface 3 (281) can push the end cover to move.

8. The motor end cover drilling tool according to claim 1, characterized in that: A connecting plate (131) is fixedly connected to one side of the support tube (13), a return spring four (132) is fixedly connected between the support block (27) and the connecting plate (131), and a return spring five (151) is fixedly connected between the collar (15) and the support tube (13).

9. The motor end cover drilling tool according to claim 5, characterized in that: The driving shaft of the first rotation source (3) is fixedly connected to a lead screw 1 (34), the movable frame 2 (31) is threadedly connected to the lead screw 1 (34), and the driving shaft of the third rotation source (122) is fixedly connected to a lead screw 2 (123), the lead screw 2 (123) is threadedly connected to the movable frame 1 (12).

10. The motor end cover drilling tool according to claim 2, characterized in that: The drill bit (11) is detachably connected to the collet (33).

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