CN211192176U - Variable-diameter drill bit - Google Patents
Variable-diameter drill bit Download PDFInfo
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- CN211192176U CN211192176U CN201921649818.0U CN201921649818U CN211192176U CN 211192176 U CN211192176 U CN 211192176U CN 201921649818 U CN201921649818 U CN 201921649818U CN 211192176 U CN211192176 U CN 211192176U
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- drill bit
- variable
- diameter
- reducing
- adjusting screw
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Abstract
The utility model discloses a variable diameter drill bit, it includes an elasticity chip removal section of thick bamboo, a center pole, reducing adjusting screw, first reducing tapering axle, second reducing tapering axle, first drill bit and a plurality of interval sliding connection are at the epaxial second drill bit of second reducing tapering, center pole runs through elasticity chip removal section of thick bamboo, reducing adjusting screw locates in the center pole, first reducing tapering axle threaded connection is in the upper end of reducing adjusting screw, second reducing tapering axle threaded connection is at the lower extreme of reducing adjusting screw, the other end activity of second drill bit passes center pole, interval sliding connection has the expansion arm on the first reducing tapering axle, the other end hub connection of expansion arm has first gyro wheel; the utility model discloses a set up reducing adjusting screw and the cooperation of the tapered axle of second reducing, reach the radial purpose of activity of adjusting the second drill bit, can realize the hole of the multiple aperture specification of a drill bit drilling, improved the commonality of drill bit greatly, improve the efficiency of drilling work.
Description
Technical Field
The utility model relates to a drilling equipment technical field especially relates to a but reducing drill bit.
Background
The movable radius of the existing drill bit is fixed and unchangeable, and when holes with different aperture specifications need to be drilled, the drill bits with different specifications often need to be replaced, so that the drilling work is complicated and inflexible, and the efficiency of the drilling work is influenced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the shortcoming above, provide a but reducing drill bit.
In order to achieve the above purpose, the specific scheme of the utility model is as follows: including elasticity chip removal section of thick bamboo, well core rod, reducing adjusting screw, first reducing tapering axle, second reducing tapering axle, first drill bit and a plurality of interval sliding connection at the epaxial second drill bit of second reducing tapering, the both ends of elasticity chip removal section of thick bamboo are provided with flexible rubber ring respectively, well core rod runs through elasticity chip removal section of thick bamboo setting, reducing adjusting screw locates in the well core rod, first reducing tapering axle threaded connection is in reducing adjusting screw's upper end, second reducing tapering axle threaded connection is at reducing adjusting screw's lower extreme, the second drill bit is located the lower tip of elasticity chip removal section of thick bamboo, the other end activity well core rod of second drill bit passes the back and supports with flexible rubber ring and lean on, first drill bit activity joint is at well core rod's lower extreme and is located the below of second drill bit, interval demountable installation has three first blade on the first drill bit, the second drill bit is detachably provided with a second blade, the first reducing taper shaft is connected with an expansion arm at intervals in a sliding mode, the other end of the expansion arm is connected with a first roller in a shaft mode, and the first roller abuts against the flexible rubber ring.
The drill bit comprises a first reducing taper shaft, a second reducing taper shaft and a first drill bit, wherein the first reducing taper shaft is arranged on the drill bit, and the second reducing taper shaft is arranged on the drill bit.
The second drill bit further comprises a reducing sliding arm and a second roller arranged on the reducing sliding arm, the second blade is detachably connected to the reducing sliding arm, and the second roller is abutted to the flexible rubber ring.
Wherein, the elastic chip removal cylinder is provided with wave-shaped pipe walls at intervals.
And a bearing is connected between the upper end of the reducing adjusting screw rod and the central rod in a matching manner.
The utility model has the advantages that: compared with the prior art, the utility model achieves the purpose of adjusting the movable radius of the second drill bit by arranging the reducing adjusting screw rod to be matched with the second reducing taper shaft, so that one drill bit can drill holes with various aperture specifications, thereby greatly improving the universality of the drill bit and improving the efficiency of the drilling work;
in addition, the utility model adopts a two-stage drill bit structure mode, the first drill bit is responsible for centering micro-drilling, the second drill bit is responsible for reaming and heavy cutting, the cutting resistance can be effectively reduced, and simultaneously, the self-centering is higher, and the axial straightness of the hole and the roundness of the hole are improved;
still, the utility model discloses a set up an elasticity chip removal section of thick bamboo, discharge behind the piece that makes the drilling produce through an elasticity chip removal section of thick bamboo to make the piece can not rub drilling surface, reach the higher effect of drilling surface finish.
Drawings
Fig. 1 is a schematic structural diagram of a variable-diameter drill bit according to an embodiment of the present invention;
fig. 2 is a cross-sectional view of a variable diameter drill bit provided by an embodiment of the present invention;
fig. 3 is a schematic structural diagram of the variable-diameter drill bit provided by the embodiment of the present invention after the elastic chip removal cylinder is detached;
fig. 4 is a schematic structural view of the variable-diameter drill bit according to the embodiment of the present invention after the elastic chip removal cylinder and the center rod are removed;
fig. 5 is a schematic structural diagram of a first drill bit provided by an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a second drill bit provided in an embodiment of the present invention;
description of reference numerals: 1-an elastic chip removal cylinder; 11-a flexible rubber ring; 12-wave-shaped pipe wall; 2-a central rod; 3-a variable-diameter adjusting screw rod; 4-a first variable-diameter taper shaft; 5-a second variable-diameter taper shaft; 6-a first drill bit; 61-a first blade; 7-a second drill bit; 71-a second blade; 72-variable diameter sliding arm; 73-a second roller; 8-an expansion arm; 9-a first roller; 100-cooling channels.
Detailed Description
The following detailed description of the present invention, taken in conjunction with the accompanying drawings and specific examples, is not intended to limit the scope of the invention.
As shown in fig. 1 to 6, the variable diameter drill bit of this embodiment includes an elastic chip removal cylinder 1, a central rod 2, a variable diameter adjusting screw rod 3, a first variable diameter taper shaft 4, a second variable diameter taper shaft 5, a first drill bit 6 and a second drill bit 7 slidably connected to the second variable diameter taper shaft 5 at intervals, wherein flexible rubber rings 11 are respectively disposed at two ends of the elastic chip removal cylinder 1, the central rod 2 passes through the elastic chip removal cylinder 1, the variable diameter adjusting screw rod 3 is disposed in the central rod 2, the first variable diameter taper shaft 4 is screwed to the upper end of the variable diameter adjusting screw rod 3, the second variable diameter taper shaft 5 is screwed to the lower end of the variable diameter adjusting screw rod 3, the second drill bit 7 is located at the lower end of the elastic chip removal cylinder 1, the other end of the second drill bit 7 is movably connected to the flexible rubber rings 11 after passing through the central rod 2, the first drill bit 6 is movably connected to the lower end of the central rod 2 and located below the second drill, interval demountable installation has three first blade 61 on the first drill bit 6, demountable installation has second blade 71 on the second drill bit 7, interval sliding connection has expansion arm 8 on the first reducing tapering axle 4, the other end coupling of expansion arm 8 has first gyro wheel 9, first gyro wheel 9 supports and leans on flexible rubber ring 11, can set up the ring recess on flexible rubber ring 11, and a part structure of first gyro wheel 9 is located in the ring recess, can make first gyro wheel 9 can not slide for flexible rubber ring 11 on the vertical direction, and the structure is firm. Preferably, the first blade 61 and the second blade 71 both adopt hard alloy blades, can be disassembled and replaced, reduce the use cost, and can also adapt to high-speed drilling with high drilling efficiency. Preferably, as shown in fig. 4, the number of the second drill 7 is three, and correspondingly, the number of the expansion arm 8 and the number of the first roller 9 are three respectively.
The upper end part of the reducing adjusting screw 3 is provided with a hexagonal notch for facilitating screwing of the reducing adjusting screw 3, when in use, according to the aperture size of a hole to be drilled, the reducing adjusting screw 3 is screwed, the reducing adjusting screw 3 rotates, so that the first reducing taper shaft 4 and the second reducing taper shaft 5 simultaneously move downwards in the vertical direction relative to the reducing adjusting screw 3, the first reducing taper shaft 4 drives the expansion arm 8 to slide, the expansion arm 8 drives the first roller 9 to extend outwards and supports against the flexible rubber ring 11 to expand the upper end of the elastic chip removal cylinder 1, meanwhile, the second reducing taper shaft 5 drives the second drill bit 7 to expand outwards and supports against the flexible rubber ring 11, thereby changing the movable radius of the second drill bit 7 until the movable radius of the second drill bit 7 reaches the aperture to be drilled, at the moment, the lower end of the elastic chip removal cylinder 1 expands, and the purpose of synchronous diameter change of the elastic chip removal cylinder 1 and the second drill bit 7 is realized, and the upper end and the lower end of the elastic chip removal cylinder 1 are ensured to be in diameter change synchronization, then the upper end of the central rod 2 is in transmission connection with an external power mechanism, the central rod 2 rotates under the drive of the external power mechanism, the central rod 2 transmits cutting torque to the expansion arm 8, the second drill bit 7 and the first drill bit 6, at the moment, the expansion arm 8 drives the first reducing taper shaft 4 to rotate, the second drill bit 7 drives the second reducing taper shaft 5 to rotate, the first reducing taper shaft 4 and the second reducing taper shaft 5 drive the reducing adjusting screw 3 to rotate under the self-locking force among threads, so that the drilling and cutting work is carried out, the first drill bit 6 drives the first blade 61 to be responsible for cutting the central area of the drilled hole and carrying out centering micro-cutting, the second drill hole drives the second blade 71 to be responsible for cutting the edge area of the drilled hole and carrying out the reaming work, and chips generated during the cutting and drilling are discharged through the elastic chip removal, by adopting an internal chip removal mode, the surface of the hole is separated from the drilling part by the elastic chip removal cylinder 1, the elastic chip removal cylinder 1 and the wall of the hole are kept static without sliding friction, so that the surface smoothness of the hole is higher; and the movable radius of the second drill bit 7 needs to be reduced, and the movable radius of the second drill bit 7 can be adjusted only by reversely screwing the reducing adjusting screw 3.
In the embodiment, the variable-diameter adjusting screw 3 is matched with the second variable-diameter taper shaft 5, so that the purpose of adjusting the movable radius of the second drill bit 7 is achieved, one drill bit can drill holes with various hole diameters, the universality of the drill bit is greatly improved, and the drilling efficiency is improved;
in addition, the embodiment adopts a two-stage drill bit structure mode, the first drill bit 6 is responsible for centering micro drilling, the second drill bit 7 is responsible for reaming and heavy cutting, cutting resistance can be effectively reduced, and meanwhile, the self-centering performance is higher, and the axial straightness of the hole and the roundness of the hole are improved;
in addition, in the embodiment, the elastic chip removal cylinder 1 is arranged, so that chips generated by drilling are discharged after passing through the elastic chip removal cylinder 1, and therefore the chips cannot rub the surface of a drilled hole, and the effect of higher smoothness of the surface of the drilled hole is achieved.
Preferably, as shown in fig. 2, in the cutting and drilling process, a cooling channel 100 is arranged to inject cooling fluid into a central cutting area of the first drill 6, so that the first drill 6 and the second drill 7 can be cooled more uniformly, the cooling effect is better, the first blade 61 and the second blade 71 are protected, and the cooling channel 100 sequentially penetrates through the variable diameter adjusting screw 3, the second variable diameter taper shaft 5 and the first drill 6 from top to bottom along the axial direction of the central rod 2.
As shown in fig. 3, 4 and 6, the second drill 7 further includes a reducing sliding arm 72 and a second roller 73 mounted on the reducing sliding arm 72, the second blade 71 is detachably connected to the reducing sliding arm 72, the second roller 73 abuts against the flexible rubber ring 11, and a circular groove is formed in the flexible rubber ring 11, so that the second roller 73 can be limited to slide relative to the flexible rubber ring 11 in the vertical direction, the structure is firmer, when the drill is used, the reducing adjusting screw 3 is screwed to enable the second reducing taper shaft 5 to slide downwards, the second reducing taper shaft 5 abuts against the reducing sliding arm 72 to expand outwards, the second roller 73 abuts against the flexible rubber ring 11 to expand the lower end of the elastic chip removal cylinder 1, so that the second drill 7 and the elastic chip removal cylinder 1 keep synchronous reducing, and when the drill rotates, the second roller 73 slides along the circumferential direction of the circular groove.
Based on the above embodiments, as shown in fig. 1 and fig. 2, further, the elastic chip removal cylinder 1 is provided with the wavy pipe walls 12 at intervals, and preferably, the wavy pipe walls 12 are uniformly arranged at intervals, which is favorable for the expansion of the elastic chip removal cylinder 1.
Based on the above embodiment, further, a bearing is connected between the upper end of the reducing adjusting screw rod 3 and the central rod 2 in a matching manner, so that the effect of reducing the rotation resistance is achieved.
The above is only a preferred embodiment of the present invention, so all the equivalent changes or modifications made by the structure, features and principles in accordance with the claims of the present invention are included in the protection scope of the present invention.
Claims (5)
1. The variable-diameter drill bit is characterized by comprising an elastic chip removal cylinder (1), a central rod (2), a variable-diameter adjusting screw rod (3), a first variable-diameter taper shaft (4), a second variable-diameter taper shaft (5), a first drill bit (6) and a second drill bit (7) which is connected onto the second variable-diameter taper shaft (5) in a sliding mode at intervals, wherein flexible rubber rings (11) are respectively arranged at two ends of the elastic chip removal cylinder (1), the central rod (2) penetrates through the elastic chip removal cylinder (1) to be arranged, the variable-diameter adjusting screw rod (3) is arranged in the central rod (2), the first variable-diameter taper shaft (4) is in threaded connection with the upper end of the variable-diameter adjusting screw rod (3), the second variable-diameter taper shaft (5) is in threaded connection with the lower end of the variable-diameter adjusting screw rod (3), and the second drill bit (7) is located at the lower end, the other end activity of second drill bit (7) is passed well core rod (2) back and is leaned on with flexible rubber ring (11), first drill bit (6) activity joint is in the lower extreme of well core rod (2) and is located the below of second drill bit (7), interval demountable installation has three first blade (61) on first drill bit (6), demountable installation has second blade (71) on second drill bit (7), interval sliding connection has expansion arm (8) on first reducing taper axle (4), the other end coupling of expansion arm (8) has first gyro wheel (9), first gyro wheel (9) are supported and are leaned on flexible rubber ring (11).
2. The variable-diameter drill bit according to claim 1, further comprising a cooling channel (100), wherein the cooling channel (100) sequentially penetrates through the variable-diameter adjusting screw (3), the second variable-diameter tapered shaft (5) and the first drill bit (6) from top to bottom.
3. The variable-diameter drill bit according to claim 1, wherein the second drill bit (7) further comprises a variable-diameter sliding arm (72) and a second roller (73) arranged on the variable-diameter sliding arm (72), the second blade (71) is detachably connected to the variable-diameter sliding arm (72), and the second roller (73) abuts against the flexible rubber ring (11).
4. A variable diameter drill bit according to claim 1, characterized in that the elastic chip removal cylinder (1) is provided with wave-shaped pipe walls (12) at intervals.
5. A variable diameter drill bit according to claim 1, characterized in that a bearing is fittingly connected between the upper end of the variable diameter adjusting screw (3) and the central rod (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921649818.0U CN211192176U (en) | 2019-09-30 | 2019-09-30 | Variable-diameter drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921649818.0U CN211192176U (en) | 2019-09-30 | 2019-09-30 | Variable-diameter drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211192176U true CN211192176U (en) | 2020-08-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921649818.0U Active CN211192176U (en) | 2019-09-30 | 2019-09-30 | Variable-diameter drill bit |
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| CN (1) | CN211192176U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112096293A (en) * | 2020-11-17 | 2020-12-18 | 胜利油田固邦石油装备有限责任公司 | Variable-diameter drill bit for oil field drilling |
-
2019
- 2019-09-30 CN CN201921649818.0U patent/CN211192176U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112096293A (en) * | 2020-11-17 | 2020-12-18 | 胜利油田固邦石油装备有限责任公司 | Variable-diameter drill bit for oil field drilling |
| CN112096293B (en) * | 2020-11-17 | 2021-02-09 | 胜利油田固邦石油装备有限责任公司 | Variable-diameter drill bit for oil field drilling |
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