Hollow motor direct drive type ejector pin punching drill structure

Abstract

The invention belongs to the technical field of cutting beds, and particularly relates to a hollow motor direct drive type ejector pin punching drill structure which comprises a rack, an assembling plate is arranged on the side edge of the rack, an air cylinder and first guide sleeves are arranged above the assembling plate, the number of the first guide sleeves is two, first guide rods are arranged in the first guide sleeves in a sliding mode, and a piston rod of the air cylinder and the lower ends of the first guide rods are connected with a mounting plate. A hollow motor is arranged on the mounting plate, the lower end of the hollow rotating shaft is connected with a chuck assembly, a guide sleeve fixing seat is connected between the two first guide sleeves, an ejector rod is arranged on the guide sleeve fixing seat, and the ejector rod penetrates through the hollow rotating shaft and extends into the hollow drill. The device is good in structural stability, high in machining precision, long in service life, simple in structure, stable in transmission and not prone to faults; the price is low, and the cost is effectively saved; the hollow drill is convenient, fast, time-saving and labor-saving to disassemble Meanwhile, the structure is compact, interference with the cutter head is avoided, the space between the hollow drill and the movable disc is large, the cutter and the hollow drill in the cutter head can be replaced conveniently, and the device is suitable for the automatic cutting bed.

Description

Technical field:

[0001] The invention belongs to the technical field of cutting machines, and in particular relates to a hollow motor direct-driven ejector drilling structure. Background technology:

[0002] Automatic cutting machines are cutting equipment used to cut fabrics and are widely used in industries such as clothing manufacturing and car seat manufacturing. When cutting, some cutting patterns need to be positioned and punched, and the cutting fabrics are relatively thick. When punching once, there will be a lot of waste blocking the drill bit, making it impossible to punch holes continuously. Therefore, an ejector is provided to eject the waste in the drilling hole.

[0003] The Chinese invention patent (publication number CN107471309A, application date 2017.08.19, publication date 2017.12.15) discloses a hollow drill mechanism for an automatic cutting machine, including a frame: a driver is arranged on the frame, the driver includes a movable part that can be raised and lowered, a motor is arranged on the movable part and can be raised and lowered with the movable part, the motor is connected to the hollow drill through a transmission mechanism, the motor drives the transmission mechanism to move and then drives the hollow drill to rotate, and the lower end of the hollow drill is a drilling edge. A motor bracket is arranged on the movable part of the driver, and the motor is arranged on the motor bracket. A mounting plate is arranged on the motor bracket, and the transmission mechanism is arranged on the mounting plate. The transmission mechanism includes a driving gear and a driven gear, the driving gear is connected to the rotating shaft of the motor and is driven to rotate by the motor, the driven gear is meshed with the driving gear for transmission, one end of the gear shaft of the driven gear is rotatably arranged on the mounting plate, and the other end is connected to the hollow drill, and the gear shaft of the driven gear is a hollow shaft. One end of the gear shaft of the driven gear is rotatably set on the mounting plate, and the other end is connected to the hollow drill. The gear shaft of the driven gear is a hollow shaft. The upper end of the hollow drill is inserted into the lower part of the gear shaft of the driven gear and is fixed by a radially arranged set screw. The motor is a pneumatic motor, and a muffler is provided on the pneumatic motor. A connecting plate is provided on the frame, and a push rod is provided at the outer end of the connecting plate. The push rod is located above the hollow drill, and the push rod can be extended into the hollow drill to eject the waste located in the hollow drill. In addition to the above-mentioned gear transmission mechanism, the transmission mechanism can also be replaced by a synchronous belt transmission mechanism, a chain transmission mechanism, etc.

[0004] The above-mentioned hollow drill mechanism for automatic cutting machines has the following shortcomings: 1. The rotating shaft of the pneumatic motor is connected to the hollow drill through a transmission mechanism. The rotating shaft and the axis of the hollow drill are not in the same straight line, the structural stability is poor, and the hollow drill is subjected to uneven force when working, which leads to low processing accuracy and short service life. In addition, the structure is complex, the transmission is unstable, and it is easy to fail. 2. The pneumatic motor is expensive, which is not conducive to reducing production costs. 3. The hollow drill is fixed to the gear shaft of the driven gear by a set screw. Replacing the hollow drill is troublesome, time-consuming and labor-intensive.

[0005] The Chinese utility model patent (publication number CN220762904U, application date 2023.07.27, publication date 2024.04.12) discloses an anti-blocking knife drilling mechanism, including a hollow shaft motor, a hollow drill, an L-shaped base, a linear guide, a cylinder and a push rod; a knife pad is provided on the transverse part of the L-shaped base, and a push rod fixing plate, a linear guide and a cylinder are installed on the longitudinal part. The hollow shaft motor is fixed to the slider on the linear guide through a motor fixing seat, and the cylinder is connected to the motor fixing seat through a floating joint; the hollow shaft motor is connected to the hollow drill through a hollow connecting sleeve, the upper end of the push rod is fixedly mounted on the push rod fixing plate, and the lower end passes through the hollow shaft motor, the hollow connecting sleeve and the hollow drill and extends out of the drill; the knife pad is located directly below the hollow drill. Although it discloses a hollow shaft motor, the upper end of the push rod is fixedly mounted on the push rod fixing plate, and the lower end passes through the hollow shaft motor, the hollow connecting sleeve and the hollow drill and extends out of the drill, its layout is not compact enough and occupies a large space. In addition, the cylinder arranged between the hollow drill and the L-shaped base will interfere with the knife disc arranged under the frame, so its structure cannot be directly applied to automatic cutting machines. Summary of the invention:

[0006] The purpose of the present invention is to provide a hollow motor direct-driven thimble punching drill structure, which has good structural stability, uniform force when the hollow drill is working, high processing accuracy, long service life, simple structure, stable transmission, and is not prone to failure; at the same time, it is cheap and effectively saves costs; the hollow drill is convenient and quick to disassemble and assemble, saves time and effort, and is conducive to maintenance; at the same time, it has a compact structure and will not interfere with the cutter disc located under the frame, and the space between the hollow drill and the moving disc is large, which is convenient for replacing the cutting knife and the hollow drill in the cutter disc, and is suitable for automatic cutting machines.

[0007] The present invention is achieved in that:

[0008] A hollow motor direct-driven ejector drilling structure comprises a frame, a mounting plate is provided on the side of the frame, a cylinder and a guide sleeve are provided above the mounting plate, two guide sleeves are provided, the cylinder is located between the two guide sleeves, a guide rod is slidably provided inside the guide sleeve, a piston rod of the cylinder and a lower end of the guide rod are connected to the mounting plate, a hollow motor is provided on the mounting plate, a chuck assembly is connected to the lower end of the hollow rotating shaft of the hollow motor, a hollow drill coaxial with the hollow rotating shaft is provided on the chuck assembly, a guide sleeve fixing seat is connected between the two guide sleeves, a ejector rod for ejecting waste in the hollow drill is provided on the guide sleeve fixing seat, and the ejector rod passes through the hollow rotating shaft and extends into the hollow A core drill, wherein the chuck assembly comprises a chuck body whose upper end is connected to a hollow rotating shaft, a sleeve mounted outside the chuck body, and an elastic member whose elastic force causes the sleeve to move downward; the upper end of the hollow drill is inserted into the chuck body, a through hole is provided in the chuck body for a push rod to pass through, a lower limit platform is provided at the lower end of the chuck body for lower limiting the sleeve, a accommodating through hole is provided on the side wall of the chuck body, a ball is provided in the accommodating through hole, a limit block is provided on the inner side of the sleeve, and when the sleeve is at the lowest position, the limit block limits the ball in the clamping hole of the hollow drill, and the hollow drill is fixed relative to the chuck body; when the sleeve is moved upward and the limit block leaves the ball, the hollow drill can slide relative to the chuck body.

[0009] In the above-mentioned hollow motor direct-driven ejector drilling structure, the limit block is annular, and the lower surface of the limit block is a conical surface with a smaller diameter at the top and a larger diameter at the bottom.

[0010] In the above-mentioned hollow motor direct-driven ejector drilling structure, the chuck body is provided with an upper limit platform located above the lower limit platform, and the elastic member is a compression spring sleeved outside the chuck body, the upper end of the compression spring abuts against the upper limit platform, and the lower end abuts against the limit block.

[0011] In the above-mentioned hollow motor direct-driven ejector drilling structure, the elastic member may also be a tension spring or a leaf spring.

[0012] In the above-mentioned hollow motor direct-driven ejector drilling structure, the upper limit platform can be a nut screwed onto the outside of the chuck body, or a convex edge that is an integral structure with the chuck body; the lower limit platform can be a nut screwed onto the outside of the chuck body, or a convex edge that is an integral structure with the chuck body.

[0013] In the above-mentioned hollow motor direct-driven ejector drilling structure, there are a plurality of the clamping holes evenly distributed around the circumference, and correspondingly, there are a plurality of accommodating through holes and a plurality of clamping holes evenly distributed around the circumference.

[0014] In the above-mentioned hollow motor direct-driven ejector drilling structure, the hollow motor is located above the mounting plate, the upper end of the chuck body passes through the mounting plate to connect the coupling, and the lower end of the hollow shaft is connected to the coupling.

[0015] In the above-mentioned hollow motor direct-driven ejector drilling structure, a bearing sleeved outside the chuck body is provided between the chuck body and the mounting plate.

[0016] In the above-mentioned hollow motor direct-driven thimble drilling structure, the lower end of the hollow rotating shaft is inserted into the upper end of the coupling, and the upper end of the chuck body is inserted into the lower end of the coupling. Notches are respectively provided on the upper and lower side walls of the coupling, and are respectively locked by locking screws.

[0017] In the above-mentioned hollow motor direct-driven ejector drilling structure, a hollow connecting flange is provided between the hollow motor and the mounting plate, and the coupling is arranged in the connecting flange.

[0018] In the above-mentioned hollow motor direct-driven ejector drilling structure, the guide sleeve fixing seat protrudes toward one side of the hollow motor and forms a groove for avoiding the cylinder on the side away from the hollow motor. The guide sleeve fixing seat is provided with an ejector fixing seat, and the upper end of the ejector rod is connected to the ejector fixing seat.

[0019] In the above-mentioned hollow motor direct-driven ejector drilling structure, a bearing sleeved on the guide rod one is provided between the guide sleeve one and the guide rod one.

[0020] In the above-mentioned hollow motor direct-driven ejector drilling structure, a mounting sleeve is fixed to the ejector fixing seat by means of a ball screw, the ejector rod is screwed in the mounting sleeve, and the upper end thereof extends out of the mounting sleeve connection handle.

[0021] In the above-mentioned hollow motor direct-driven thimble punching drill structure, a cloth pressing block is provided under the mounting plate, and two guide rods are provided at both ends of the cloth pressing block, and the two guide rods are respectively located on both sides of the hollow drill, and a reset spring one is provided between the mounting plate and the cloth pressing block and is sleeved on the guide rod two. The upper end of the guide rod two is slidably arranged in the mounting plate, and the upper end of at least one guide rod two passes through the mounting plate to connect the stopper, and a reset spring two is provided between the stopper and the mounting plate and is sleeved on the guide rod two.

[0022] In the above-mentioned hollow motor direct-driven ejector drilling structure, two guide sleeves 2 are provided on the mounting plate, guide rod 2 is slidably arranged in the corresponding guide sleeve 2, a bearing sleeved on guide rod 2 is provided between guide sleeve 2 and guide rod 2, the upper end of reset spring 1 abuts against the corresponding bearing, and the lower end of reset spring 2 abuts against the corresponding bearing.

[0023] In the above-mentioned hollow motor direct-driven thimble punching drill structure, a guide sleeve for guiding the hollow drill is provided on the cloth pressing block.

[0024] The outstanding advantages of the present invention compared with the prior art are:

[0025] 1. The present invention provides a hollow motor, and the hollow drill is directly connected to the lower end of the hollow shaft of the hollow motor. The push rod passes through the hollow shaft and extends into the hollow drill. The hollow shaft and the hollow drill are coaxially arranged, and the structural stability is good. The hollow drill is evenly stressed during operation, has high machining accuracy, and has a long service life. The structure is simple, the transmission is stable, and it is not easy to fail. At the same time, the hollow motor is used for driving, which is cheap and effectively saves costs. The hollow drill is connected to the lower end of the hollow shaft through a chuck assembly, and the hollow drill can be quickly replaced by moving the sleeve. The hollow drill is convenient and quick to disassemble and assemble, which saves time and effort, is conducive to maintenance, and can adapt to the scene where the hollow drill needs to be frequently replaced, thereby greatly improving the cutting efficiency. The cylinder and the guide sleeve of the present invention are both located above the assembly plate arranged on the side of the frame, and the structure is compact, and will not interfere with the cutter disc located below the frame. The space between the hollow drill and the moving disc is large, which is convenient for replacing the cutting knife and the hollow drill in the cutter disc, and is suitable for automatic cutting machines.

[0026] 2. The stop block of the present invention is annular, and the lower surface of the stop block is a conical surface with a smaller diameter at the top and a larger diameter at the bottom, which is convenient for the sleeve to move downward and for the ball to reset;

[0027] 3. The ejector pin fixing seat of the present invention is fixed with a mounting sleeve by means of a ball screw, the ejector rod is screwed into the mounting sleeve, and the upper end thereof extends out of the mounting sleeve connecting handle, so that the ejector rod can be quickly disassembled and assembled, and the length of the ejector rod extending into the hollow drill can be adjusted. Description of the drawings:

[0028] Figure 1 The present invention is a three-dimensional Figure 1 ;

[0029] Figure 2 The present invention is a three-dimensional Figure 2 ;

[0030] Figure 3 is a cross-sectional view of the present invention without a frame;

[0031] Figure 4 yes Figure 3 Enlarged view of point A.

[0032] 1. Assembly plate; 2. Guide rod; 3. Guide pin; 4. Guide rod 5. Guide rod 6. Guide rod 7. Clamp body; 8. Sleeve; 9. Elastic member; 10. Lower limit platform; 11. Accommodating through hole; 12. Ball bearing; 13. Limit block; 14. Conical surface; 15. Upper limit platform; 16. Coupling; 17. Connecting flange; 18. Cylinder; 19. Guide sleeve 1; 20. Guide rod 1; 21. Ejector fixing seat; 22. Cloth pressing block; 23. Guide rod 2; 24. Reset spring 1; 25. Stop block; 26. Reset spring 2; 27. Guide sleeve 2; 28. Ball screw; 29. ​​Mounting sleeve; 30. Handle; 31. Guide sleeve fixing seat; 32. Guide sleeve; 33. Assembly plate. Specific implementation method:

[0033] The present invention is further described below with reference to specific embodiments. Figure 1 —4:

[0034] A hollow motor direct-driven ejector drilling structure, comprising a frame 1, a mounting plate 33 is provided on the side of the frame 1, a cylinder 18 and a guide sleeve 19 are provided above the mounting plate 33, two guide sleeves 19 are provided, the cylinder 18 is located between the two guide sleeves 19, a guide rod 20 is slidably provided in the guide sleeve 19, the piston rod of the cylinder 18 and the lower ends of the guide rod 20 are connected to the mounting plate 2, a hollow motor 3 is provided on the mounting plate 2, a chuck assembly is connected to the lower end of the hollow shaft 4 of the hollow motor 3, a hollow drill 5 coaxial with the hollow shaft 4 is provided on the chuck assembly, a guide sleeve fixing seat 31 is connected between the two guide sleeves 19, a ejector rod 6 for ejecting waste in the hollow drill 5 is provided on the guide sleeve fixing seat 31, and the ejector rod 6 passes through the hollow shaft 4 and extends into A hollow drill 5, wherein the chuck assembly comprises a chuck body 7 whose upper end is connected to the hollow rotating shaft 4, a sleeve 8 sleeved on the outside of the chuck body 7, and an elastic member 9 whose elastic force causes the sleeve 8 to move downward. The upper end of the hollow drill 5 is inserted into the chuck body 7, and a through hole is provided in the chuck body 7 for the push rod 6 to pass through. The lower end of the chuck body 7 is provided with a lower limit platform 10 for lower limiting the sleeve 8. A accommodating through hole 11 is provided on the side wall of the chuck body 7, and a ball 12 is provided in the accommodating through hole 11. A limit block 13 is provided on the inner side of the sleeve 8. When the sleeve 8 is at the lowest position, the limit block 13 limits the ball 12 in the clamping hole of the hollow drill 5, and the hollow drill 5 is fixed relative to the chuck body 7; when the sleeve 8 is moved upward and the limit block 13 leaves the ball 12, the hollow drill 5 can slide relative to the chuck body 7.

[0035] The working principle of the present invention is as follows: Figure 1-4 As shown, the existing cutting machine CNC control system is operated to control the hollow shaft 4 of the hollow motor 3 to rotate, driving the chuck assembly and the hollow drill 5 to rotate. When the cylinder 18 drives the mounting plate 2 to move down to punch holes, the push rod 6 does not move. After the punching is completed, the cylinder 18 drives the mounting plate 2 to move up, driving the chuck assembly and the hollow drill 5 to move up, and the push rod 6 pushes out the waste in the hollow drill 5, greatly improving the punching efficiency. The guide rod 20 and the guide sleeve 19 guide the vertical sliding of the mounting plate 2, so that the mounting plate 2 can move vertically smoothly.

[0036] The clamping process of the chuck assembly of the present invention is as follows: the sleeve 8 is moved upward, the elastic member 9 undergoes elastic deformation, the limit block 13 leaves the ball 12, and after the hollow drill 5 is installed, the sleeve 8 is released, and the sleeve 8 moves downward under the elastic force of the elastic member 9 until it contacts the lower limit platform 10 and is in the lowest position, and the limit block 13 pushes the ball 12 to move toward the inside of the chuck body 7 until the ball 12 is inserted into the clamping hole of the hollow drill 5, and the ball 12 is limited in the clamping hole, and the hollow drill 5 is fixed relative to the chuck body 7, and the installation is completed; when the hollow drill 5 needs to be removed, the sleeve 8 is moved upward, the limit block 13 leaves the ball 12, and the hollow drill 5 can slide relative to the chuck body 7, and the hollow drill 5 is removed.

[0037] like Figure 1-4 As shown, the present invention is provided with a hollow motor 3, a hollow drill 5 is directly connected to the lower end of the hollow shaft 4 of the hollow motor 3, a push rod 6 passes through the hollow shaft 4 and extends into the hollow drill 5, the hollow shaft 4 and the hollow drill 5 are coaxially arranged, the structural stability is good, the hollow drill 5 is subjected to uniform force during operation, the processing accuracy is high, the service life is long, and the structure is simple, the transmission is stable, and it is not easy to fail; at the same time, it is driven by a hollow motor, which is cheap and effectively saves costs; and the hollow drill is connected to the lower end of the hollow shaft 4 through a chuck assembly, and moves The sleeve 8 can quickly realize the replacement of the hollow drill 5. The hollow drill 5 is convenient and quick to disassemble and assemble, which saves time and effort and is conducive to maintenance. It can adapt to the scene where the hollow drill 5 needs to be replaced frequently, thereby greatly improving the cutting efficiency. The cylinder 18 and the guide sleeve 19 of the present invention are both located above the assembly plate 33 arranged on the side of the frame 1. The structure is compact and will not interfere with the cutter disc located below the frame 1. The space between the hollow drill 5 and the moving disc is large, which is convenient for replacing the cutting knife and the hollow drill 5 in the cutter disc, and is suitable for automatic cutting machines.

[0038] In order to prevent the ball 12 from completely leaving the receiving through hole 11 when the sleeve 8 is moved upward, the ball 12 is reset when the sleeve 8 is moved downward. Figure 3 , 4 As shown, the limit block 13 is annular, and the lower surface of the limit block 13 is a conical surface 14 with a smaller diameter at the top and a larger diameter at the bottom. During the downward movement of the sleeve 8, the conical surface 14 gradually pushes the ball 12 to move into the chuck body 7, facilitating the downward movement of the sleeve 8.

[0039] The structure of the elastic member 9 is as follows: Figure 3 , 4 As shown, the chuck body 7 is provided with an upper limit platform 15 located above the lower limit platform 10, and the elastic member 9 is a compression spring sleeved outside the chuck body 7, the upper end of the compression spring abuts against the upper limit platform 15, and the lower end abuts against the limit block 13. The structure is simple and easy to install.

[0040] Furthermore, the upper limit platform 15 can be a nut screwed onto the outside of the chuck body 7, or a convex edge with an integral structure with the chuck body 7; the lower limit platform 10 can be a nut screwed onto the outside of the chuck body 7, or a convex edge with an integral structure with the chuck body 7. In this embodiment, the upper limit platform 15 is a nut screwed onto the outside of the chuck body 7, and the lower limit platform 10 is a convex edge with an integral structure with the chuck body 7.

[0041] Preferably, there are a plurality of the locking holes evenly distributed on the circumference, and correspondingly, there are a plurality of the accommodating through holes 11 and the locking holes evenly distributed on the circumference.

[0042] The installation structure of the chuck body 7 and the hollow rotating shaft 4: the hollow motor 3 is located above the mounting plate 2, the upper end of the chuck body 7 passes through the mounting plate 2 to connect to the coupling 16, and the lower end of the hollow rotating shaft 4 is connected to the coupling 16.

[0043] Furthermore, a bearing sleeved outside the chuck body 7 is provided between the chuck body 7 and the mounting plate 2 .

[0044] The installation structure of the hollow shaft 4 and the coupling 16, and the chuck body 7 and the coupling 16: the lower end of the hollow shaft 4 is inserted into the upper end of the coupling 16, the upper end of the chuck body 7 is inserted into the lower end of the coupling 16, and the side walls at the upper and lower ends of the coupling 16 are respectively provided with notches, and are respectively locked by locking screws.

[0045] In order to ensure a stable installation structure of the hollow motor 3 , a hollow connecting flange 17 is provided between the hollow motor 3 and the mounting plate 2 , and the coupling 16 is disposed in the connecting flange 17 .

[0046] In order to make the structure more compact: Figure 1-3 As shown, the guide sleeve fixing seat 31 protrudes toward one side of the hollow motor 3 and forms a groove for avoiding the cylinder 18 on the side away from the hollow motor 3. The guide sleeve fixing seat 31 is provided with an ejector pin fixing seat 21, and the upper end of the ejector rod 6 is connected to the ejector pin fixing seat 21.

[0047] Furthermore, a bearing sleeved on the guide rod 20 is provided between the guide sleeve 19 and the guide rod 20.

[0048] In order to quickly disassemble and assemble the ejector rod 6 and adapt to the scene where the hollow drill 5 needs to be frequently replaced, thereby greatly improving the cutting efficiency, a mounting sleeve 29 is locked and fixed on the ejector pin fixing seat 21 by a ball screw 28, and the ejector rod 6 is screwed in the mounting sleeve 29, and the upper end extends out of the mounting sleeve 29 to connect the handle 30. By rotating and adjusting the position of the ejector rod 6 relative to the mounting sleeve 29, the length of the ejector rod 6 extending into the hollow drill 5 can be adjusted.

[0049] Furthermore, a cloth pressing block 22 is provided below the mounting plate 2, and two guide rods 23 are provided at both ends of the cloth pressing block 22, and the two guide rods 23 are respectively located at both sides of the hollow drill 5. A reset spring 24 sleeved on the guide rod 23 is provided between the mounting plate 2 and the cloth pressing block 22, and the upper end of the guide rod 23 is slidably arranged in the mounting plate 2, and at least one upper end of the guide rod 23 passes through the mounting plate 2 to connect the stopper 25, and a reset spring 26 sleeved on the guide rod 23 is provided between the stopper 25 and the mounting plate 2. When the mounting plate 2 moves downward, the cloth pressing block 22 is driven to move downward until the cloth pressing block 22 is pressed on the cloth, and the reset spring 24 is compressed, and the mounting plate 2 and the hollow drill 5 continue to move downward to punch holes in the cloth; after the punching is completed, the mounting plate 2 moves upward, and the reset spring 26 is compressed until the elastic force of the reset spring 26 can drive the cloth pressing block 22 to move upward, and the mounting plate 2 moves upward, driving the cloth pressing block 22 to move upward.

[0050] In order to better guide the hollow drill 5 to punch holes, Figure 1-3 As shown, two guide sleeves 27 are provided on the mounting plate 2, and the guide rods 23 are slidably arranged in the corresponding guide sleeves 27. A bearing sleeved on the guide rods 23 is provided between the guide sleeves 27 and the guide rods 23, and the upper end of the reset spring 1 24 abuts against the corresponding bearing, and the lower end of the reset spring 26 abuts against the corresponding bearing.

[0051] Preferably, the cloth pressing block 22 is provided with a guide sleeve 32 for guiding the hollow drill 5 .

[0052] The above embodiment is only one of the preferred embodiments of the present invention, and is not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes made based on the shape, structure, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A hollow motor direct-driven ejector drilling structure, comprising a frame (1), characterized in that: The frame (1) is provided with an assembly plate (33) on the side, and a cylinder (18) and a guide sleeve (19) are provided above the assembly plate (33). Two guide sleeves (19) are provided, and the cylinder (18) is located between the two guide sleeves (19). A guide rod (20) is slidably provided inside the guide sleeve (19). The piston rod of the cylinder (18) and the guide rod (20) are connected to the mounting plate (2) at their lower ends. The mounting plate (2) is provided with a center A hollow motor (3), the lower end of the hollow rotating shaft (4) of the hollow motor (3) is connected to a chuck assembly, the chuck assembly is provided with a hollow drill (5) coaxial with the hollow rotating shaft (4), a guide sleeve fixing seat (31) is connected between two guide sleeves (19), the guide sleeve fixing seat (31) is provided with a push rod (6) for ejecting waste in the hollow drill (5), the push rod (6) passes through the hollow rotating shaft (4) and extends into the hollow drill (5), the chuck assembly includes an upper end A chuck body (7) connected to the hollow rotating shaft (4), a sleeve (8) sleeved outside the chuck body (7), and an elastic member (9) whose elastic force causes the sleeve (8) to move downward, the upper end of the hollow drill (5) is inserted into the chuck body (7), the chuck body (7) is provided with a through hole for the push rod (6) to pass through, the lower end of the chuck body (7) is provided with a lower limit platform (10) for lowering the sleeve (8), and the side wall of the chuck body (7) is provided with a container A through hole (11) is provided to accommodate a ball (12) in the through hole (11); a limit block (13) is provided on the inner side of the sleeve (8); when the sleeve (8) is located at the lowest position, the limit block (13) limits the ball (12) in the clamping hole of the hollow drill (5), and the hollow drill (5) is fixed relative to the chuck body (7); when the sleeve (8) is moved upward and the limit block (13) leaves the ball (12), the hollow drill (5) can slide relative to the chuck body (7).

2. A hollow motor direct-driven ejector drilling structure according to claim 1, characterized in that: The limiting block (13) is annular, and the lower surface of the limiting block (13) is a conical surface (14) with a smaller diameter at the top and a larger diameter at the bottom.

3. A hollow motor direct-driven ejector drilling structure according to claim 2, characterized in that: The chuck body (7) is provided with an upper limit platform (15) located above the lower limit platform (10); the elastic member (9) is a compression spring sleeved outside the chuck body (7); the upper end of the compression spring abuts against the upper limit platform (15) and the lower end abuts against the limit block (13).

4. The hollow motor direct-driven ejector drilling structure according to claim 1, characterized in that: The hollow motor (3) is located above the mounting plate (2), the upper end of the chuck body (7) passes through the mounting plate (2) to connect to the coupling (16), and the lower end of the hollow rotating shaft (4) is connected to the coupling (16).

5. The hollow motor direct-driven ejector drilling structure according to claim 4, characterized in that: A hollow connecting flange (17) is provided between the hollow motor (3) and the mounting plate (2), and the coupling (16) is arranged in the connecting flange (17).

6. The hollow motor direct-driven ejector drilling structure according to claim 4, characterized in that: The guide sleeve fixing seat (31) protrudes toward one side of the hollow motor (3) and forms a groove for avoiding the cylinder (18) on the side away from the hollow motor (3). The guide sleeve fixing seat (3) is provided with an ejector pin fixing seat (21), and the upper end of the ejector rod (6) is connected to the ejector pin fixing seat (21).

7. The hollow motor direct-driven ejector drilling structure according to claim 6, characterized in that: A mounting sleeve (29) is locked and fixed on the ejector pin fixing seat (21) by means of a ball screw (28); the ejector rod (6) is screwed into the mounting sleeve (29), and the upper end thereof extends out of the mounting sleeve (29) to connect with a handle (30).

8. The hollow motor direct-driven ejector drilling structure according to claim 1, characterized in that: A cloth pressing block (22) is provided below the mounting plate (2), and two guide rods (23) are provided at both ends of the cloth pressing block (22). The two guide rods (23) are respectively located on both sides of the hollow drill (5). A return spring (24) sleeved on the guide rod (23) is provided between the mounting plate (2) and the cloth pressing block (22). The upper end of the guide rod (23) is slidably arranged in the mounting plate (2), and the upper end of at least one guide rod (23) passes through the mounting plate (2) to connect to a stopper (25). A return spring (26) sleeved on the guide rod (23) is provided between the stopper (25) and the mounting plate (2).

9. The hollow motor direct-driven ejector drilling structure according to claim 8, characterized in that: The mounting plate (2) is provided with two guide sleeves (27), the guide rods (23) are slidably arranged in the corresponding guide sleeves (27), a bearing sleeved on the guide rods (23) is arranged between the guide sleeves (27) and the guide rods (23), the upper end of the return spring (24) abuts against the corresponding bearing, and the lower end of the return spring (26) abuts against the corresponding bearing.

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