A punching device for motor end cover

Abstract

The application discloses a punching device for a motor end cover and relates to the field of punching equipment, and solves the problem that it is difficult to remove burrs at both ends of a hole during punching and the processing efficiency is relatively low when the punching device for the motor end cover is used, comprising a machine body, a punching mechanism, an edge grinding mechanism and a dust collection mechanism, the punching mechanism comprises a driving shaft and a drill bit, the edge grinding mechanism comprises a rotating pipe and an edge grinding block, the driving shaft is driven to rotate and lift by the punching mechanism, so that the drill bit realizes the punching function, when the driving shaft rotates forward, the edge grinding block is simultaneously introduced into the rotating pipe through the edge grinding mechanism, when the driving shaft reversely rotates, the two sets of edge grinding blocks are controlled to extend and converge to the middle part, synchronous edge grinding operation is performed on the upper and lower edge positions of the hole of the motor end cover, the efficiency of removing the burrs is improved, and dust generated during the operation of the edge grinding mechanism is sucked and stored through linkage of the dust collection mechanism.

Description

Technical Field

[0001] This invention relates to the field of drilling equipment technology, specifically a drilling device for motor end caps. Background Technology

[0002] The motor end cover is an important component of the motor, and its machining precision affects the motor's performance to a certain extent. Motor end covers are usually made of stretched steel plates, die-cast aluminum alloys, or injection molded plastics, and serve to protect the motor fan blades and provide overall protection for the motor in accordance with certain protection level requirements.

[0003] Existing motor end cover drilling devices mostly use punching or drilling to open holes. After drilling, burrs will appear at the edges of the holes. At this time, it is necessary to use a grinding mechanism to grind the edges of the holes to avoid the burrs being too sharp and causing safety hazards. However, this segmented processing operation is relatively inefficient and requires multiple sets of processing equipment to be combined. Sometimes, it is also necessary to transport and convey the motor end cover, which greatly reduces production efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a drilling device for motor end caps that facilitates simultaneous grinding and deburring of both ends of the hole during the drilling process, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a drilling device for a motor end cap, comprising a body, a drilling mechanism, an edge grinding mechanism, and a dust extraction mechanism. A fixed frame is fixedly connected to the body. The drilling mechanism includes a drive shaft mounted on the upper side of the body, with a drill bit at the bottom of the drive shaft. The drilling mechanism drives the drive shaft to rotate and lift, enabling the drill bit to perform the drilling function. The edge grinding mechanism includes a rotating tube rotatably connected to the outer wall of the drive shaft. Two sets of edge grinding blocks are provided on the rotating tube. The two sets of edge grinding blocks are... The grinding blocks are positioned at different heights, and each group includes multiple grinding blocks. The grinding mechanism is used to synchronously retract the grinding blocks into the rotating tube when the drive shaft rotates in the forward direction. When the drive shaft rotates in the reverse direction, it controls the two groups of grinding blocks to extend and close towards the center, synchronously grinding the upper and lower edges of the motor end cover hole. The dust collection mechanism is installed on the upper side of the machine body and is used to suck up and store the dust generated when the grinding mechanism is running, so as to simultaneously complete the grinding and deburring operation at both ends of the hole during the drilling process.

[0006] Preferably, the edge grinding mechanism further includes a guide block fixedly installed on the edge grinding block. Multiple sets of sliding grooves are evenly opened on the outer wall of the rotating tube. A guide frame is slidably connected in the sliding groove along the vertical direction. The guide block is slidably connected to the inner wall of the guide frame along the horizontal direction. The inclined sides of the upper and lower sets of edge grinding blocks are arranged opposite each other. The drive shaft is provided with a pusher for controlling the horizontal sliding state of the guide block. The rotating tube is provided with a lifting member for controlling the lifting state of the guide frame. This facilitates the synchronous retraction of the edge grinding block into the rotating tube when the drive shaft rotates in the forward direction. When the drive shaft rotates in the reverse direction, it controls the two sets of edge grinding blocks to extend and close towards the center, so as to perform synchronous edge grinding operation on the upper and lower edges of the motor end cover hole.

[0007] Preferably, the pushing component includes a connecting rod rotatably connected to the side of the grinding block, and two sets of driving grooves are provided on the driving shaft. A fixed rod is fixedly connected in the driving groove, and the fixed rod passes through the connecting rod and is movably sleeved with the inner wall of the connecting rod, so as to facilitate control of the horizontal sliding state of the guide block.

[0008] Preferably, the lifting component includes a lifting rod fixedly installed on the grinding block, two sets of annular grooves are provided inside the rotating tube, and multiple sets of lifting grooves connected to the annular grooves are provided inside the rotating tube. A tension spring fixedly connected to the annular groove is fixedly connected to the lifting rod. The lifting rod is slidably connected to the inner wall of the lifting groove in the vertical direction. A conveying pipe connected to both sets of annular grooves is provided inside the rotating tube. An inflation component is provided on the rotating tube for inflating the conveying pipe when the drive shaft rotates, so as to facilitate control of the lifting state of the guide frame.

[0009] Preferably, the inflation component includes multiple sets of drive blades fixedly installed on the outer wall of the upper end of the rotating tube. The rotating tube has an air inlet groove that communicates with the delivery tube. An air inlet net is rotatably connected to the outer wall of the rotating tube. The outer wall of the drive blade is in contact with the inner wall of the air inlet net and rotates to facilitate inflation of the delivery tube when the drive shaft rotates.

[0010] Preferably, the drilling mechanism further includes an electric telescopic rod fixedly installed on the fixed frame. The telescopic end of the electric telescopic rod is fixedly connected to a device box. A drive motor is fixedly connected inside the device box. The output end of the drive motor is coaxially fixedly connected to the upper end of the drive shaft, so as to drive the drive shaft to rotate and lift, so that the drill bit can perform the drilling function.

[0011] Preferably, the dust collection mechanism includes a threaded tube threadedly connected to the bottom end of the device box, a storage box threadedly connected to the inner wall of the threaded tube, the inner wall of the storage box rotatably fitting against the outer wall of the drive shaft, an air inlet screen fixedly connected to the storage box, an air inlet hole communicating with the air inlet screen on the storage box, a dust collection pipe communicating with the sliding groove on the rotating tube, a connecting pipe inside the drive shaft, a first side hole communicating with the dust collection pipe on the lower side of the drive shaft, and a second side hole communicating with the storage box on the upper side of the drive shaft. Both the first side hole and the second side hole are connected to the connecting pipe, facilitating the simultaneous suction and storage of dust generated during the operation of the edge grinding mechanism.

[0012] Preferably, the machine body has a mating hole that can be connected to the drill bit, and the bottom end of the drive shaft is fixedly connected to an installation tube. The drill bit can be threadedly connected to the inner wall of the installation tube, so that the drill bit can completely pass through the motor end cover to make a hole.

[0013] Preferably, a filter screen is fixedly connected to the side of the storage box near the air inlet, which facilitates the blocking of dust in the storage box while allowing airflow to be transported.

[0014] Preferably, a baffle is fixedly connected to the side of the guide frame, which facilitates synchronous lifting and lowering of the baffle during the lifting and lowering of the guide frame. The baffle blocks the lifting and lowering position of the connecting rod, preventing dust from entering the drive groove through the sliding groove.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] This invention provides a drilling device for motor end caps, solving the problem of low processing efficiency caused by the difficulty in directly removing burrs from both ends of the hole during the drilling process in existing motor end cap drilling devices. The device uses a drilling mechanism to drive a drive shaft to rotate and lift, enabling the drill bit to perform the drilling function. When the drive shaft rotates forward, a grinding mechanism simultaneously retracts the grinding blocks into the rotating tube. When the drive shaft rotates in the reverse direction, two sets of grinding blocks extend and converge towards the center, simultaneously grinding the upper and lower edges of the hole in the motor end cap, improving burr removal efficiency. During the operation of the grinding mechanism, a dust extraction mechanism is used to suck up and store the generated dust. This device has a compact structure and small size, enabling direct grinding of the hole edges during the drilling process, greatly improving the efficiency of hole grinding. It eliminates the need for handling and secondary processing, making operation highly efficient and convenient. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 This is a partial structural diagram of the punching mechanism of the present invention;

[0019] Figure 3 for Figure 2 Enlarged view of region A in the middle;

[0020] Figure 4 This is a partial structural diagram of the edge grinding mechanism of the present invention;

[0021] Figure 5 This is a partial structural cross-sectional view of the dust collection mechanism of the present invention;

[0022] Figure 6 for Figure 5 Enlarged view of region B in the middle;

[0023] Figure 7 This is an exploded view of a portion of the structure of the inflatable component of the present invention;

[0024] Figure 8 This is a partial structural cross-sectional view of the edge grinding mechanism of the present invention;

[0025] Figure 9 for Figure 8 Enlarged view of region C;

[0026] Figure 10 This is a partial structural diagram of the actuator of the present invention.

[0027] In the diagram: 1-Main body; 2-Fixed frame; 3-Drilling mechanism; 4-Drive shaft; 5-Drill bit; 6-Edge grinding mechanism; 7-Rotating tube; 8-Edge grinding block; 9-Dust suction mechanism; 10-Guide block; 11-Sliding groove; 12-Guide frame; 13-Pushing component; 14-Lifting component; 15-Connecting rod; 16-Drive groove; 17-Fixed rod; 18-Lifting rod; 19-Annular groove; 20-Lifting groove; 21-Tension spring; 2 2-Conveying pipe; 23-Inflating component; 24-Drive blade; 25-Inlet slot; 26-Inlet screen; 27-Electric telescopic rod; 28-Device box; 29-Drive motor; 30-Threaded pipe; 31-Storage box; 32-Inlet hole; 33-Dust suction pipe; 34-Connecting pipe; 35-First side hole; 36-Second side hole; 37-Mating hole; 38-Filter screen; 39-Mounting pipe; 40-Baffle; 41-Motor end cover. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Please see Figures 1-10 This invention provides a technical solution: a drilling device for motor end caps, comprising a body 1, a drilling mechanism 3, an edge grinding mechanism 6, and a dust extraction mechanism 9. A fixing frame 2 is fixedly connected to the body 1. The drilling mechanism 3 includes a drive shaft 4 mounted on the upper side of the body 1, with a drill bit 5 at the bottom of the drive shaft 4. The drilling mechanism 3 drives the drive shaft 4 to rotate and lift, enabling the drill bit 5 to perform the drilling function. The edge grinding mechanism 6 includes a rotating tube 7 rotatably connected to the outer wall of the drive shaft 4, with two sets of... The edge grinding blocks 8 are arranged in two groups at different heights, and each group includes multiple edge grinding blocks 8. The edge grinding mechanism 6 is used to synchronously retract the edge grinding blocks 8 into the rotating tube 7 when the drive shaft 4 rotates in the forward direction. When the drive shaft 4 rotates in the reverse direction, it controls the two groups of edge grinding blocks 8 to extend and close towards the center, so as to synchronously grind the upper and lower edges of the hole in the motor end cover 41. The dust collection mechanism 9 is installed on the upper side of the body 1 and is used to suck up and store the dust generated when the edge grinding mechanism 6 is running.

[0030] The edge grinding mechanism 6 also includes a guide block 10 fixedly installed on the edge grinding block 8. Multiple sets of sliding grooves 11 are evenly opened on the outer wall of the rotating tube 7. A guide frame 12 is slidably connected in the vertical direction in the sliding groove 11. The guide block 10 and the inner wall of the guide frame 12 are slidably connected in the horizontal direction. The inclined sides of the upper and lower sets of edge grinding blocks 8 are arranged opposite each other. The drive shaft 4 is provided with a pusher 13 for controlling the horizontal sliding state of the guide block 10. The rotating tube 7 is provided with a lifting member 14 for controlling the lifting state of the guide frame 12. The pusher 13 includes a connecting rod 15 rotatably connected to the side of the edge grinding block 8. Two sets of drive grooves 16 are opened on the drive shaft 4. A fixed rod 17 is fixedly connected in the drive groove 16. The fixed rod 17 passes through the connecting rod 15 and is movably sleeved with the inner wall of the connecting rod 15. A baffle 40 is fixedly connected to the side of the guide frame 12.

[0031] The lifting component 14 includes a lifting rod 18 fixedly installed on the grinding block 8. Two sets of annular grooves 19 are opened in the rotating tube 7. Multiple sets of lifting grooves 20 connected to the annular grooves 19 are opened in the rotating tube 7. A tension spring 21 fixedly connected to the annular grooves 19 is fixedly connected to the lifting rod 18. The lifting rod 18 and the inner wall of the lifting groove 20 are slidably connected in the vertical direction. A conveying pipe 22 connected to both sets of annular grooves 19 is opened in the rotating tube 7. An inflation component 23 is provided on the rotating tube 7 for inflating the conveying pipe 22 when the drive shaft 4 rotates.

[0032] The inflation component 23 includes multiple sets of drive blades 24 fixedly installed on the upper outer wall of the rotating tube 7. The rotating tube 7 has an air inlet groove 25 that communicates with the delivery tube 22. The opening area of ​​the air inlet groove 25 facing the delivery tube 22 is smaller than the opening area facing the drive blades 24, which facilitates the improvement of the efficiency of gas delivery into the delivery tube 22. An air inlet net 26 is rotatably connected to the outer wall of the rotating tube 7. The outer wall of the drive blades 24 is in contact with the inner wall of the air inlet net 26 and rotates.

[0033] The drilling mechanism 3 also includes an electric telescopic rod 27 fixedly installed on the fixed frame 2. The telescopic end of the electric telescopic rod 27 is fixedly connected to a device box 28. A drive motor 29 is fixedly connected inside the device box 28. The drive motor 29 is preferably a YYHS-40. The output end of the drive motor 29 is coaxially fixedly connected to the upper end of the drive shaft 4. The machine body 1 is provided with a mating hole 37 that can be connected to the drill bit 5. The bottom end of the drive shaft 4 is fixedly connected to an installation tube 39. The drill bit 5 can be threadedly connected to the inner wall of the installation tube 39.

[0034] The vacuuming mechanism 9 includes a threaded tube 30 that is threaded to the bottom of the device box 28. A storage box 31 is threaded to the inner wall of the threaded tube 30. The inner wall of the storage box 31 is rotatably fitted to the outer wall of the drive shaft 4. An air intake screen 26 is fixedly connected to the storage box 31. An air intake hole 32 communicating with the air intake screen 26 is opened on the storage box 31. A filter screen 38 is fixedly connected to the side of the storage box 31 near the air intake hole 32. A vacuuming pipe 33 communicating with the sliding groove 11 is opened on the rotating tube 7. A connecting pipe 34 is opened inside the drive shaft 4. A first side hole 35 communicating with the vacuuming pipe 33 is opened on the lower side of the drive shaft 4. A second side hole 36 communicating with the storage box 31 is opened on the upper side of the drive shaft 4. Both the first side hole 35 and the second side hole 36 are connected to the connecting pipe 34.

[0035] In this implementation plan, (the provisions are attached) Figure 10 (The drive shaft 4 rotates clockwise for forward rotation and counterclockwise for reverse rotation.) Place the motor end cover 41 on the upper side of the machine body 1. Control the electric telescopic rod 27 to push the device box 28 to rise and fall, thereby driving the drive motor 29 and drive shaft 4 to rise and fall together. When the drive motor 29 drives the drive shaft 4 to rotate forward, the drive shaft 4 drives the fixed rod 17 to pull the connecting rod 15, so that the connecting rod 15 is in an inclined state to pull the connected grinding block 8. The guide block 10 slides along the guide frame 12, so that the grinding block 8 can be controlled to be retracted into the sliding groove 11. At this time, the drive shaft 4 drives the drill bit 5 and the rotating tube 7 to rotate and move downward. The bottom of the drill bit 5 drills a hole in the motor end cover 41. After drilling is completed, the electric telescopic rod 27 continues to push so that the drill bit 5 is inserted into the docking hole 37 until the two sets of grinding blocks 8 are respectively on the upper and lower sides of the hole in the motor end cover 41, and the lifting and lowering state stops.

[0036] The drive motor 29 is controlled to rotate in the opposite direction. At this time, the drive groove 16 on the drive shaft 4 pushes the fixed rod 17, causing the connecting rod 15 to swing in the opposite direction and push the grinding block 8 out to all sides. The inclined surfaces of the upper and lower grinding blocks 8 are opposite each other. Then, the drive shaft 4 continues to drive the rotating tube 7 to rotate in the opposite direction. During the rotation, the rotating tube 7 drives the drive blade 24 to rotate, drawing gas into the air inlet groove 25 through the air inlet net 26 and conveying it into the conveying pipe 22. The air pressure in the conveying pipe 22 increases, and the gas enters the lifting groove 20 through the annular groove 19, pushing the lifting rod 18 to slide in the lifting groove 20. The tension spring 21 is stretched, which allows the upper guide frame 12 to slide downward and the lower guide frame 12 to slide upward. At the same time, the connecting rod 15 will slide on the fixed rod 17, which allows multiple grinding blocks 8 to be in an unfolded state for lifting and lowering until the grinding block 8 abuts against the edge of the hole in the motor end cover 41, thus removing the burrs at the edge.

[0037] It is worth noting that the gas pressure input through the delivery pipe 22 is not too high, and is only used to push the grinding block 8 to move up and down. The contact force between the grinding block 8 and the hole of the motor end cover 41 does not need to be too high to avoid the hole enlargement. After the grinding block 8 contacts the edge of the motor end cover 41, it can no longer move. At this time, the rotating pipe 7 will drive the grinding block 8 to rotate and remove the burrs on the edge of the hole.

[0038] During the edge grinding process, the drive blade 24 draws the gas around the air intake net 26 into the air intake net 26, allowing the gas in the storage box 31 to flow through the filter 38 and the air intake hole 32 to the air intake net 26. The air pressure in the storage box 31 decreases, and the gas is drawn into the first side hole 35 through the dust suction pipe 33, then transported to the second side hole 36 through the connecting pipe 34, and finally discharged into the storage box 31. During this process, the dust generated around the edge grinding block 8 can be sucked up by the dust suction pipe 33 and transported into the storage box 31. After being filtered by the filter 38, the dust accumulates in the storage box 31, and the gas is discharged through the air intake hole 32. This cycle achieves the purpose of automated dust collection. During this process, only a part of the gas input to the air intake net 26 comes from the storage box 31, and the rest comes from the outside. This can avoid the situation where poor airflow in the storage box 31 causes slow suction and prevents the air pressure in the lifting groove 20 from increasing rapidly.

[0039] After the edge grinding is completed, the drive motor 29 drives the drive shaft 4 to rotate forward again. At the same time, the electric telescopic rod 27 moves the drill bit 5 upward, allowing the drill bit 5 to be removed from the motor end cover 41, completing the drilling operation. During this process, the drive shaft 4 drives the connecting rod 15 again to pull the edge grinding block 8 and the guide block 10 to slide inside the guide frame 12 into the sliding groove 11, thereby releasing the obstruction of the two sets of edge grinding blocks 8 on the hole of the motor end cover 41. The rotating tube 7 can then be freely pulled out from the hole of the motor end cover 41. During the reverse rotation of the drive blade 24, reverse air extraction will occur, causing the air pressure in the lifting groove 20 to decrease. With the action of the tension spring 21, the grinding block 8 will slide in the reverse direction to one end of the sliding groove 11 to complete the reset. During the process of the air intake net 26 blowing air to all sides, some gas will be transported to the storage box 31 through the filter 38. Since the holes of the second side hole 36 are relatively small, it is difficult for the gas to carry dust and flow back into the second side hole 36. At this time, most of the gas will be discharged to the outside through the air intake net 26.

[0040] After use, the side of the storage box 31 can be opened by rotating the threaded tube 30, which makes it easy to discharge dust and replace the filter screen 38. The drill bit 5 can be disassembled and replaced by rotating the drill bit 5 in the opposite direction to the drilling direction. Sandpaper with a certain thickness and elasticity can be pasted on the inclined surface of the grinding block 8 to make it easier to fit and grind the edge of the hole.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A punching device for an electric motor end cap, comprising: The machine body, on which a fixed frame is fixedly connected; characterized in that it further includes: The drilling mechanism includes a drive shaft mounted on the upper side of the machine body, and a drill bit is provided at the bottom of the drive shaft. The drilling mechanism drives the drive shaft to rotate and lift, so that the drill bit can perform the drilling function. The edge-grinding mechanism includes a rotating tube rotatably connected to the outer wall of the drive shaft. Two sets of edge-grinding blocks are mounted on the rotating tube at different heights, with each set containing multiple edge-grinding blocks. When the drive shaft rotates forward, the mechanism synchronously retracts the edge-grinding blocks into the rotating tube. When the drive shaft rotates in the reverse direction, it controls the two sets of edge-grinding blocks to extend and converge towards the center, synchronously grinding the upper and lower edges of the motor end cover hole. The mechanism also includes guide blocks fixedly mounted on the edge-grinding blocks. Multiple sets of sliding grooves are evenly distributed on the outer wall of the rotating tube. Guide frames are slidably connected vertically within these grooves. The guide blocks are slidably connected horizontally to the inner wall of the guide frames. The inclined surfaces of the upper and lower sets of edge-grinding blocks are positioned opposite each other. The drive shaft has a pusher for controlling the horizontal sliding state of the guide blocks, and the rotating tube has a lifting mechanism for controlling the lifting state of the guide frames. The pushing component includes a connecting rod rotatably connected to the side of the grinding block. Two sets of driving grooves are provided on the drive shaft, and a fixed rod is fixedly connected within each driving groove. The fixed rod passes through the connecting rod and is movably sleeved with the inner wall of the connecting rod. The lifting component includes a lifting rod fixedly installed on the grinding block. Two sets of annular grooves are provided inside the rotating tube. Multiple sets of lifting grooves connected to the annular grooves are provided inside the rotating tube. A tension spring fixedly connected to the lifting rod and the annular groove is fixedly connected. The lifting rod and the inner wall of the lifting groove are slidably connected in the vertical direction. A conveying pipe connected to both annular grooves is provided inside the rotating tube. An inflation component for inflating the conveying pipe when the drive shaft rotates is provided on the rotating tube. The inflation component includes multiple sets of driving blades fixedly installed on the upper outer wall of the rotating tube. An air inlet groove connected to the conveying pipe is provided on the rotating tube. An air inlet net is rotatably connected to the outer wall of the rotating tube. The outer wall of the driving blades rotates in contact with the inner wall of the air inlet net.

2. The punching device for a motor end cover according to claim 1, characterized in that: The drilling mechanism also includes an electric telescopic rod fixedly installed on a fixed frame. The telescopic end of the electric telescopic rod is fixedly connected to a device box, and a drive motor is fixedly connected inside the device box. The output end of the drive motor is coaxially fixedly connected to the upper end of the drive shaft.

3. The punching device for a motor end cap according to claim 2, characterized in that: It also includes a dust collection mechanism, which is installed on the upper side of the machine body and is used to suck up and store the dust generated during the operation of the edge grinding mechanism. The dust collection mechanism includes a threaded tube that is threaded to the bottom of the device box. The inner wall of the threaded tube is threaded to a storage box. The inner wall of the storage box is rotatably fitted with the outer wall of the drive shaft. The air intake screen is fixedly connected to the storage box. The storage box has an air intake hole that communicates with the air intake screen. The rotating tube has a dust collection pipe that communicates with the sliding groove. The drive shaft has a connecting pipe. The lower side of the drive shaft has a first side hole that communicates with the dust collection pipe. The upper side of the drive shaft has a second side hole that communicates with the storage box. Both the first side hole and the second side hole are connected to the connecting pipe.

4. The punching device for a motor end cover according to claim 1, characterized in that: The machine body has a mating hole that can be connected to the drill bit, and the bottom end of the drive shaft is fixedly connected to an installation tube, which can be threadedly connected to the inner wall of the installation tube.

5. A punching device for a motor end cap according to claim 3, characterized in that: A filter screen is fixedly connected to the side of the storage box near the air inlet.

6. A punching device for a motor end cap according to claim 1, characterized in that: A baffle is fixedly connected to the side of the guide frame.

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