Reaming device for drilling

Abstract

The utility model discloses a broaching device for drilling, which belongs to the technical field of broaching devices and comprises a central column and a rotary gear ring sleeve rotatably arranged at the bottom end of the central column, a plurality of combined drill bits are circumferentially distributed at the bottom end of the rotary gear ring sleeve, and the top ends of the combined drill bits are slidably connected with the bottom end of the rotary gear ring sleeve. An expanding and supporting assembly is arranged on the inner side of the combined drill bit. The combined drill bits, the expanding and supporting assembly and the lifting threaded column are arranged, the lifting threaded column is pressed downwards through the pressing block, then the expanding and supporting assembly is used for enabling the combined drill bits at all positions to uniformly move all around, meanwhile, height rotation of the combined drill bits is matched, and drill bits of different specifications do not need to be replaced according to requirements. The drill holes are expanded into drill holes with different hole diameters, and meanwhile, the expanded drill holes are ensured to be standard cylindrical holes, so that the screw can be ensured to be attached to the inner walls of the drill holes after being inserted.

Description

Technical Field

[0001] The utility model relates to the technical field of hole enlarging devices, in particular to a hole enlarging device for drilling. Background Art

[0002] In the existing metal processing process, a tapered reamer is often used to expand the drilled hole. Due to the tapered structure of the reamer, the drilled hole after expansion is truncated into a cone shape. When the workpiece is thin, the taper of the drilled hole after expansion is not obvious, which does not affect the installation of the screw. However, when the workpiece is thick, the taper of the drilled hole after expansion becomes obvious. As a result, after the screw passes through the drilled hole, the side wall of the screw and the inner wall of the drilled hole cannot fit together, thereby affecting the stability of the screw installation.

[0003] In addition, when the existing conical reamer is used to expand the drill hole, the downward movement distance of the reamer depends entirely on the experience of the staff, and the diameter of the drill hole after expansion cannot be accurately controlled, which easily leads to over-expansion and under-expansion. Therefore, a drilling expansion device is proposed to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to solve the problem in the prior art that when the workpiece is thick, the taper of the drill hole after the tapered reamer is used becomes obvious, so that after the screw passes through the drill hole, the side wall of the screw cannot fit with the inner wall of the drill hole, thereby affecting the stability of the screw installation. A drilling reaming device is proposed to solve the problem in the prior art that when the workpiece is thick, the taper of the drill hole becomes obvious after the screw passes through the drill hole,

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A hole-reaming device for drilling comprises a center column and a rotating gear ring sleeve rotatably arranged at the bottom end of the center column, a plurality of combination drill bits are distributed circumferentially on the bottom end of the rotating gear ring sleeve, the top end of the combination drill bit is slidably connected to the bottom end of the rotating gear ring sleeve, an expansion support assembly is provided on the inner side of the combination drill bit, a lifting groove is provided at the center of the top end of the center column, a guide groove symmetrical about the lifting groove is provided at the top end of the center column, a force-applying assembly is provided inside the lifting groove, a motor box is installed on the side wall of the center column, a servo motor is installed inside the motor box, the output end of the servo motor is fixedly connected to a driving gear meshing with the rotating gear ring sleeve, and a handle is fixedly connected to the side wall of the center column.

[0007] Preferably, a limiting slot is provided on the inner wall of the lifting slot, and the force-applying component includes a lifting thread column arranged on the inner side of the lifting slot, and the side wall of the lifting thread column is slidably connected to the limiting slot through a magnetic slider, and the magnetic slider and the inner wall of the limiting slot are magnetically attracted to each other.

[0008] Preferably, the top end of the lifting threaded column is fixedly connected to a pressing block, the surface of the lifting threaded column is threadedly connected to a threaded ring, the surface of the threaded ring is slidably provided with a U-shaped block, the bottom end of the U-shaped block is fixedly connected to a scale plate, and the scale plate is slidably connected to the guide groove.

[0009] Preferably, aligned sliding through holes are provided at the bottom centers of the central column and the rotating gear ring sleeve, and the expansion component includes a pressure rod provided through the sliding through hole.

[0010] Preferably, the top end of the pressure rod extends to the inner side of the lifting slot and is rotatably connected to the bottom end of the lifting threaded column, and the bottom end of the pressure rod is fixedly connected to a transfer block.

[0011] Preferably, the side wall of the adapter block and the inner wall of the combination drill bit are fixedly connected with a U-shaped hinge block, the U-shaped hinge block on the inner wall of the combination drill bit is positioned lower than the U-shaped hinge block on the side wall of the adapter block, and a transmission rod is rotatably connected between the U-shaped hinge blocks.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. This solution is equipped with a combination drill bit, an expansion assembly and a lifting threaded column. The lifting threaded column is pressed down by the pressing block, and then the expansion assembly is used to make the combination drill bits in various places move evenly to the surroundings. At the same time, the height rotation of the combination drill bit is coordinated. There is no need to replace drill bits of different specifications. The drill hole can be expanded into a drill hole of different diameters according to needs. At the same time, it is ensured that the drill hole after expansion is a standard cylindrical hole, thereby ensuring that the screw can fit with the inner wall of the drill hole after insertion.

[0014] 2. This solution is equipped with a lifting threaded column, a threaded ring and a scale. By rotating the threaded ring, the threaded ring drives the scale to rise and fall, which can accurately control the distance between the threaded ring and the top of the center column, thereby controlling the downward movement distance of the lifting threaded column, and then controlling the expansion distance of the combined drill bit, thereby achieving precise control of the expansion accuracy of the drilled hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the three-dimensional structure of a drilling expansion device proposed in this utility model Figure 1 ;

[0016] Figure 2 for Figure 1 A in the middle is an enlarged structural diagram;

[0017] Figure 3 A schematic diagram of the three-dimensional structure of a drilling expansion device proposed in this utility model Figure 2 ;

[0018] Figure 4This is a schematic cross-sectional view of a hole-reaming device for drilling proposed in the present invention;

[0019] Figure 5 for Figure 4 The enlarged structural diagram at B in the middle;

[0020] Figure 6 The utility model provides a schematic cross-sectional structure diagram of a center column and a rotating gear ring sleeve in a hole-reaming device for drilling.

[0021] In the figure: 1. Center column; 101. Lifting groove; 102. Guide groove; 2. Rotating gear ring sleeve; 3. Combination drill bit; 4. Handle; 5. Lifting threaded column; 6. Pressing block; 7. Driving gear; 8. Threaded ring; 9. U-shaped block; 10. Pressure rod; 11. Servo motor; 12. Adapter block; 13. Transmission rod; 14. Scale plate. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0023] Reference Figure 1-6 A drilling and reaming device includes a center column 1 and a rotating gear ring sleeve 2 rotatably arranged at the bottom end of the center column 1. A plurality of combined drill bits 3 are distributed circumferentially around the bottom end of the rotating gear ring sleeve 2. The plurality of combined drill bits 3 are spliced ​​together to form a complete drill bit structure.

[0024] The top of the combination drill bit 3 is slidingly connected to the bottom end of the rotating gear ring sleeve 2, and an expansion support assembly is provided on the inner side of the combination drill bit 3. Furthermore, aligned sliding through holes are opened at the bottom centers of the center column 1 and the rotating gear ring sleeve 2. The expansion support assembly includes a pressure rod 10 arranged through the sliding through hole. The top of the pressure rod 10 extends to the inner side of the lifting groove 101 and is rotatably connected to the bottom end of the lifting threaded column 5. The bottom end of the pressure rod 10 is fixedly connected to the adapter block 12, and the side walls of the adapter block 12 and the inner wall of the combination drill bit 3 are fixedly connected to U-shaped hinge blocks. The U-shaped hinge block on the inner wall of the combination drill bit 3 is lower than the U-shaped hinge block on the side wall of the adapter block 12, and a transmission rod 13 is rotatably connected between the U-shaped hinge blocks.

[0025] It should be noted that: when the lifting threaded column 5 is pressed down by the pressing block 6, the lifting threaded column 5 drives the pressure rod 10 to move downward, and the pressure rod 10 drives the top end of the transmission rod 13 to move downward through the adapter block 12, so that the bottom end of the transmission rod 13 pushes the combination drill bit 3 to move, realizing the function of the combination drill bit 3 spreading and moving around, providing the premise for the expansion of the drill hole.

[0026] A lifting groove 101 is provided at the center of the top of the center column 1, and a guide groove 102 symmetrical to the lifting groove 101 is provided at the top of the center column 1. A force-applying component is provided inside the lifting groove 101. Furthermore, a limiting slide groove is provided on the inner wall of the lifting groove 101. The force-applying component includes a lifting thread column 5 arranged on the inner side of the lifting groove 101. The side wall of the lifting thread column 5 is slidably connected to the limiting slide groove through a magnetic slider, and the magnetic slider and the inner wall of the limiting slide groove are magnetically attracted to each other.

[0027] It should be noted that the lifting threaded column 5 can be pressed downward by the pressing block 6 , and the lifting threaded column 5 drives the pressure rod 10 to move downward, providing driving force for the hole expansion of the combined drill bit 3 .

[0028] It is worth noting that when the magnetic slider slides to the top of the limiting slide groove, the magnetic slider and the inner top of the limiting slide groove are magnetically attracted to each other, so as to realize the temporary limiting function of the lifting thread column 5. At this time, the lifting thread column 5 is in the initial state.

[0029] A motor box is installed on the side wall of the central column 1, and a servo motor 11 is installed inside the motor box. The output end of the servo motor 11 is fixedly connected to a driving gear 7 that meshes with the rotating gear ring sleeve 2. The side wall of the central column 1 is fixedly connected to a handle 4.

[0030] It should be noted that the servo motor 11 drives the driving gear 7 to rotate, and the driving gear 7 drives the rotating gear ring sleeve 2 to rotate, and then drives the combined drill bit 3 to rotate, so as to realize the hole expansion function of the drilling.

[0031] Furthermore, the top of the lifting threaded column 5 is fixedly connected to a pressing block 6, the surface of the lifting threaded column 5 is threadedly connected to a threaded ring 8, the surface of the threaded ring 8 is slidably provided with a U-shaped block 9, the bottom end of the U-shaped block 9 is fixedly connected to a scale plate 14, and the scale plate 14 is slidably connected to the guide groove 102.

[0032] It should be noted that: by rotating the threaded ring 8, the threaded ring 8 drives the scale to rise and fall, and the distance between the threaded ring 8 and the top of the center column 1 can be accurately controlled, thereby controlling the downward movement distance of the lifting threaded column 5, and then controlling the expansion distance of the combination drill bit 3, thereby achieving precise control of the expansion accuracy of the drilling hole.

[0033] When the present invention is in use, the combined drill bits 3 are fitted together to form a complete drill bit structure, and at the same time, the lifting threaded column 5 is moved up to the initial state, and the combined drill bit 3 is inserted into the inner side of the drill hole to be expanded. Then, according to the expansion range, the threaded ring 8 is rotated, and the threaded ring 8 drives the scale to move downward. In conjunction with the scale, the distance between the threaded ring 8 and the top of the center column 1 can be accurately controlled, thereby controlling the downward movement distance of the lifting threaded column 5 (when the threaded ring 8 contacts the top of the center column 1, the lifting threaded column 5 cannot continue to move downward), thereby controlling the expansion distance of the combined drill bit 3, and realizing precise control of the expansion accuracy of the drill hole;

[0034] Then, the lifting threaded column 5 is pressed down by the pressing block 6, and the servo motor 11 is turned on at the same time. The servo motor 11 drives the driving gear 7 to rotate, and then drives the rotating gear ring sleeve 2 to rotate. The rotating gear ring sleeve 2 drives the combination drill bit 3 to rotate. When the lifting threaded column 5 drives the pressure rod 10 to move downward, the pressure rod 10 drives the top end of the transmission rod 13 to move downward through the adapter block 12, so that the bottom end of the transmission rod 13 pushes the combination drill bit 3 to move, realizing the function of the combination drill bit 3 to spread and move around. Under the high-speed rotation of the combination drill bit 3, when the combination drill bit 3 is rotated, the combination drill bit 3 is rotated. When the head 3 contacts the inner wall of the drill hole, it can realize the cutting function of the inner wall of the drill hole, and then realize the reaming function of the drill hole, until the threaded ring 8 contacts the top of the center column 1, and the lifting threaded column 5 cannot continue to move downward. At this time, the combined drill bit 3 cannot continue to move, and the further reaming of the drill hole is stopped. There is no need to replace drill bits of different specifications. The drill hole can be reamed into holes of different apertures according to needs, and at the same time, it is ensured that the drill hole after reaming is a standard cylindrical hole, thereby ensuring that the screw can fit with the inner wall of the drill hole after insertion, thereby ensuring the stability of the screw installation.

[0035] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A drilling reaming device, comprising a center column (1) and a rotating gear ring sleeve (2) rotatably arranged at the bottom end of the center column (1), characterized in that: A plurality of combined drill bits (3) are distributed circumferentially around the bottom end of the rotating gear ring sleeve (2), the top end of the combined drill bits (3) is slidably connected to the bottom end of the rotating gear ring sleeve (2), an expansion component is provided on the inner side of the combined drill bit (3), a lifting groove (101) is provided at the center of the top end of the center column (1), a guide groove (102) symmetrical with respect to the lifting groove (101) is provided at the top end of the center column (1), a force-applying component is provided inside the lifting groove (101), a motor box is installed on the side wall of the center column (1), a servo motor (11) is installed inside the motor box, an output end of the servo motor (11) is fixedly connected to a driving gear (7) meshing with the rotating gear ring sleeve (2), and a handle (4) is fixedly connected to the side wall of the center column (1).

2. A drilling reaming device according to claim 1, characterized in that: The inner wall of the lifting groove (101) is provided with a limiting sliding groove, and the force-applying component includes a lifting thread column (5) arranged inside the lifting groove (101), and the side wall of the lifting thread column (5) is slidably connected to the limiting sliding groove through a magnetic slider, and the magnetic slider and the inner wall of the limiting sliding groove are magnetically attracted to each other.

3. A drilling reaming device according to claim 2, characterized in that: The top end of the lifting threaded column (5) is fixedly connected to a pressing block (6), the surface of the lifting threaded column (5) is threadedly connected to a threaded ring (8), a U-shaped block (9) is slidably provided on the surface of the threaded ring (8), the bottom end of the U-shaped block (9) is fixedly connected to a scale plate (14), and the scale plate (14) is slidably connected to the guide groove (102).

4. A drilling reaming device according to claim 1, characterized in that: Aligned sliding through holes are provided at the bottom centers of the central column (1) and the rotating gear ring sleeve (2), and the expansion component includes a pressure rod (10) provided through the sliding through hole.

5. A drilling reaming device according to claim 4, characterized in that: The top end of the pressure rod (10) extends to the inner side of the lifting groove (101) and is rotatably connected to the bottom end of the lifting threaded column (5), and the bottom end of the pressure rod (10) is fixedly connected to the adapter block (12).

6. A drilling reaming device according to claim 5, characterized in that: The side wall of the adapter block (12) and the inner wall of the combination drill bit (3) are both fixedly connected with U-shaped hinge blocks, the U-shaped hinge block on the inner wall of the combination drill bit (3) is located lower than the U-shaped hinge block on the side wall of the adapter block (12), and a transmission rod (13) is rotatably connected between the U-shaped hinge blocks.

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