CN108581953B - Broken screw take-out device - Google Patents
Broken screw take-out device Download PDFInfo
- Publication number
- CN108581953B CN108581953B CN201810690432.8A CN201810690432A CN108581953B CN 108581953 B CN108581953 B CN 108581953B CN 201810690432 A CN201810690432 A CN 201810690432A CN 108581953 B CN108581953 B CN 108581953B
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- Prior art keywords
- working part
- shell
- drill bit
- thread
- broken screw
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Links
- 230000007246 mechanism Effects 0.000 claims abstract description 12
- 230000007704 transition Effects 0.000 claims description 10
- 238000000605 extraction Methods 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 11
- 229910052742 iron Inorganic materials 0.000 abstract description 5
- 230000009471 action Effects 0.000 abstract description 3
- 230000008878 coupling Effects 0.000 description 6
- 238000010168 coupling process Methods 0.000 description 6
- 238000005859 coupling reaction Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
- B25B27/18—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same withdrawing broken threaded parts or twist drills
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drilling And Boring (AREA)
Abstract
The invention provides a broken screw taking-out device, which comprises a drill bit, a magnetic horn-shaped cover, a driving mechanism, an air suction system and a shell, wherein one end of the shell is an open end, and the other end of the shell is a closed end; the air suction system is arranged at the bottom of the closed end of the shell; the magnetic horn cover is arranged at the opening end of the shell, and the inner cavity of the magnetic horn cover is communicated with the inner cavity of the shell; meanwhile, the driving mechanism is arranged in the shell and connected with one end of the drill bit, and the other end of the drill bit extends out of the magnetic horn-shaped cover; according to the invention, when the driving mechanism drives the drill bit to take out broken screws, scrap iron generated by the drill bit can be sucked into the magnetic horn cover due to the suction of the suction system and the action of the magnetic horn cover and then accumulated near the filter screen, so that the scrap iron cannot fall on a working site.
Description
Technical Field
The invention relates to the field of mechanical tools, in particular to a broken screw taking-out device.
Background
The screw is very common in use, and the conditions of a straight-line pattern or a cross pattern of the screw cap, screw cap fracture, screw fracture and the like caused by unexpected situations are also very common. Without the aid of a screw cap, how to remove the screw embedded in the screw hole is a very troublesome problem. In the mechanical field, the medical orthopaedics field is more troublesome, and after a fixing screw in an orthopaedics patient breaks due to accidents, how to take out the broken screw on the premise of reducing the damage to the patient is a problem to be solved urgently in the orthopaedics field.
Disclosure of Invention
The invention aims to provide a broken screw taking-out device, which solves the defect that the existing broken screw embedded in a screw hole cannot be taken out or is difficult to take out.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the invention provides a broken screw taking-out device, which comprises a drill bit, a magnetic horn-shaped cover, a driving mechanism, an air suction system and a shell, wherein one end of the shell is an open end, and the other end of the shell is a closed end; the air suction system is arranged at the bottom of the closed end of the shell;
the magnetic horn cover is arranged at the opening end of the shell, and the inner cavity of the magnetic horn cover is communicated with the inner cavity of the shell; meanwhile, the driving mechanism is arranged in the shell and connected with one end of the drill bit, and the other end of the drill bit extends out of the magnetic horn-shaped cover;
the drill bit comprises a working part, the working part comprises a first working part, a second working part and a third working part, wherein the first working part, the second working part and the third working part are of an integrated structure, the third working part is connected with the handle part of the drill bit, the first working part is the end part of the drill bit, and the two ends of the second working part are respectively connected with the first working part and the third working part;
the first working part is a twist drill, the second working part is a common thread, the third working part is a special-shaped thread, and the screwing directions of the three working parts are opposite to the screwing directions of the broken screws.
Preferably, the major diameters of the special-shaped threads gradually increase from the junction of the third working part and the second working part to the end part; the sharpness of the profile thread gradually decreases from the junction of the third working part and the second working part to the end part.
Preferably, the maximum diameter of the profiled thread is smaller than the minor diameter of the broken screw.
Preferably, the driving mechanism is a motor, and an output shaft of the motor is connected with the drill bit; meanwhile, a chuck is arranged between the motor and the drill bit.
Preferably, one end of the chuck is a mounting end, the other end of the chuck is a screwing end, a transition section is arranged between the mounting end and the screwing end, and the transition section and the mounting end are of an integrated structure;
the transition section is provided with external threads; the center hole has been seted up to the one end of screwing, and the screw hole has been seted up to the other end, the screw hole is connected with the external screw thread cooperation on the changeover portion, installs the jump ring in the center hole on the end of screwing, the jump ring is connected with the drill bit.
Preferably, the air suction system comprises a fan motor, and an output shaft of the fan motor is connected with a fan.
Preferably, the shell comprises an outer shell and an inner shell, wherein the inner shell is arranged in the outer shell, an air outlet is formed at the bottom of the outer shell, and an air suction duct, the air outlet, the air suction duct and a magnetic horn-shaped cover are formed between the inner shell and the air outlet; meanwhile, the air suction system is arranged at the bottom of the outer shell, and the driving mechanism is arranged at the bottom of the inner shell.
Preferably, the magnetic horn-shaped cover comprises a cover body of a magnetic structure, the small end of the cover body is provided with external threads, the external threads are connected with the internal threads of the opening end of the outer shell in a matched mode, meanwhile, a filter screen is arranged between the opening end of the outer shell and the external thread end of the cover body, and a sealing ring is arranged between the filter screen and the inner shell.
Preferably, the outer shell and the inner shell are fixedly connected through a connecting body.
Compared with the prior art, the invention has the beneficial effects that:
according to the device for taking out the broken screw, the drill bit is aligned to the broken screw, and then the drill bit is driven by the driving mechanism to start working, wherein a small hole is drilled at the upper end of the broken screw by the first working part of the drill bit, after the first working part completely enters, the rotating speed is properly reduced, and if the screw is hard in material, the speed is not required to be reduced; at this moment, the second working part starts tapping, after the third working part enters, the drill bit is actually reversely screwed off the screw, and along with the continuous rotation of the third working part, the resistance is continuously increased until the drill bit can not continuously rotate relative to the screw, and at this moment, the drill bit can continuously rotate to drive the screw to withdraw from the threaded hole. In the working process, the air suction system is started at the same time, and scrap iron generated by the drill bit can be sucked into the magnetic trumpet-shaped cover due to the air suction of the air suction system and the action of the magnetic trumpet-shaped cover and then accumulated near the filter screen, so that the scrap iron cannot fall on a working site.
Further, as the large diameter of the special-shaped thread is enlarged and the tooth shape is dulled, the resistance is enlarged continuously along with the continuous rotation of the third working part, so that the drill bit and the broken screw are kept in a static state, and finally the broken screw is withdrawn from the threaded hole.
Further, a filter screen is arranged between the magnetic horn cover body and the inner shell body to prevent dust from falling into the shell body.
Drawings
FIG. 1 is an exploded view of a take-out device according to the present invention;
fig. 2 is a cross-sectional view of a front view of the extraction device according to the present invention;
FIG. 3 is a schematic view of the structure of the drill bit;
FIG. 4 is a schematic structural view of a chuck;
FIG. 5 is a bottom view of the outer housing;
FIG. 6 is a schematic view of the magnetic horn;
wherein, 1, drill 101, clamping part 102, working part 2, magnetic horn-shaped cover 201, external screw thread 202, cover body 203, inner hole 204, filter screen 3, chuck 4, gasket 5, shaft coupling 6, motor 7, fan 8, fan motor 9, casing 901, gas outlet 902, outer casing 903, inner casing 904, connector 905, suction duct 906, internal screw thread.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1 and 2, the invention provides a broken screw taking-out device, which comprises a drill bit 1, a magnetic horn-shaped cover 2, a chuck 3, a gasket 4, a coupling 5, a motor 6, a fan 7, a fan motor 8 and a shell 9, wherein the shell 9 comprises an outer shell 902 and an inner shell 903, one end of the outer shell 902 is an open end, and the other end is a closed end.
Specifically: an internal thread 906 is formed at the opening end of the outer shell 902, and the internal thread 906 is matched and connected with an external thread 201 formed on the magnetic horn cover 2; a fan motor 8 is mounted at the bottom of the outer housing 902, and a fan 7 is connected to an output shaft of the fan motor 8.
One end of the inner housing 903 is an open end and the other end is a closed end, wherein the open end of the inner housing is connected to the open end of the outer housing 902.
The outer wall of the inner casing 903 is provided with a connector 4, and the outer casing 902 is fixedly connected with the connector 4.
The motor 6 is installed to the bottom of inner casing 903, and the output shaft of motor 6 has shaft coupling 5, and the free end of shaft coupling 5 stretches out the inner casing 903 outside, and is connected with the one end of the chuck 3 that is arranged in magnetic horn cover 2 inner chamber, wherein, is provided with packing ring 4 between shaft coupling 5 and the chuck 3.
The other end of the chuck 3 is connected with a drill bit 1, and meanwhile, the free end of the drill bit 1 extends out of the magnetic horn cover 2.
As shown in fig. 3, the drill bit 1 includes a grip portion 101 and a working portion 102, wherein the grip portion 101 is connected with the chuck 3; the working part 102 extends out of the magnetic horn-shaped cover 2 and comprises three parts, namely a first working part c, a second working part d and a third working part e, wherein the first working part c is a twist drill, the second working part d is a common thread, the third working part e is a special-shaped thread, and the rotation directions of the three working parts are all opposite rotation.
Specifically: the diameter of the first working part c is between the major diameter and the minor diameter of the thread of the second working part d;
the larger diameter of the special-shaped thread is approximately equal to the larger diameter of the common thread of the second working part d near the junction of the third working part e and the second working part d, and the farther the junction is, the larger diameter of the special-shaped thread is;
in the vicinity of the junction of the third working portion e and the second working portion d, the sharpness of the profile thread is equivalent to that of the normal thread of the second working portion d, and the further from the junction, the duller the profile thread profile is.
In the scheme, the first working part c is used for drilling, so that a space is provided for the second working part d to enter; the second working part d continuously attacks a small section of thread, so that the special-shaped thread of the third working part e is convenient to enter, and the third working part e is used for increasing the resistance of relative rotation movement between the first working part c and the screw, so that the rotation moment for reversely screwing out the screw is provided.
The screw driver has the beneficial effects that due to the increase of relative rotation resistance, the drill bit is actually fixedly connected with the broken screw, and the rotation moment of the drill bit can be transmitted to the broken screw, so that the broken screw can be screwed out.
As shown in fig. 4, one end of the chuck 3 is a mounting end 301, the other end is a screwing end 302, a transition section 303 is arranged between the mounting end 301 and the screwing end 302, and the transition section 303 and the mounting end 301 are of an integrated structure.
Wherein the mounting end 301 is connected with the coupling 5; the transition section 303 is provided with external threads; the center hole has been seted up to the one end of end 302 of screwing, and the screw hole has been seted up to the other end, the screw hole is connected with the external screw thread cooperation on the changeover portion 303, installs jump ring 304 in the center hole on the end 302 of screwing, jump ring 304 is connected with the clamping part 101 of drill bit 1.
When the screwing end 302 is screwed, the snap spring 304 is pressed to elastically deform and shrink inwards, so that the clamping part 101 of the drill bit 1 is clamped, and the drill bit 1 is clamped.
As shown in fig. 5, the closed end of the outer casing 902 is provided with an air outlet 901, and the air outlets 901 are arranged in an annular array.
An air suction duct 905 is arranged between the outer shell 902 and the inner shell 903, and the air suction duct 905 is used for communicating the inner cavity of the magnetic horn cover 2 with the inner cavity of the outer shell 902; this structure makes it possible to generate air suction force in the suction port when the fan motor 8 rotates the fan 7 at high speed, sucking the screw powder into the magnetic horn cover.
Wherein the air flow is schematically indicated by the thin lines with arrows in fig. 2.
As shown in fig. 6, the magnetic horn-shaped cover 2 includes a cover 202, an external thread 201 is provided at a small end of the cover 202, the external thread 201 is connected with an internal thread at an opening end of an outer casing 901 in a matching manner, meanwhile, a filter screen 204 is provided between the opening end of the outer casing 903 and the external thread end 201 of the cover, and a sealing ring 203 is provided between the filter screen 204 and the inner casing 903.
The cover 202 has a magnetic structure, and is capable of adsorbing the screw powder and preventing the iron powder from being sucked into the housing 9.
The working principle is as follows:
the screw thread of the common screw is normally positive rotation, and when the screw breaks, the method for taking out the broken screw by using the invention comprises the following steps:
1. the appropriate size of the counter-rotating drill bit is chosen, which means that the largest major diameter of the profiled thread part of the drill bit should be smaller than the minor diameter of the screw to be removed.
2. The drill bit and the magnetic horn-shaped cover are arranged, the rotation direction switch is adjusted to be in reverse rotation, then the speed regulating switch is used for enabling the drill bit to rotate at a high speed, and the fan switch is started.
3. Drilling a small hole at the upper end of the broken screw by using a first working part c of the drill bit, properly reducing the rotating speed after the first working part completely enters, and if the screw is made of harder materials, not reducing the speed; at this time, after the normal thread of the second working portion d starts tapping and the third working portion e enters, the rotation resistance of the drill bit 1 becomes large because the major diameter of the special-shaped thread becomes large and the tooth shape becomes blunt, the drill bit 1 is actually reversely screwing the broken screw, and the resistance continues to become large along with the continuous rotation of the third working portion e until the drill bit 1 cannot continuously rotate relative to the broken screw, and at this time, the drill bit 1 can be driven to withdraw from the threaded hole by continuously rotating the broken screw.
Meanwhile, in the process, due to the suction of the fan 7 and the action of the magnetic horn 2, the scrap iron generated by the drill bit 1 is sucked into the magnetic horn 2 and then accumulated near the filter screen, and does not fall on the work site. And the magnetic horn cover 2 is convenient to replace and clean due to being detachable.
Claims (7)
1. The utility model provides a take-out device of broken screw which characterized in that: the device comprises a drill bit (1), a magnetic horn-shaped cover (2), a driving mechanism, an air suction system and a shell (9), wherein one end of the shell (9) is an open end, and the other end is a closed end; the air suction system is arranged at the bottom of the closed end of the shell (9);
the magnetic horn-shaped cover (2) is arranged at the opening end of the shell (9), and the inner cavity of the magnetic horn-shaped cover (2) is communicated with the inner cavity of the shell (9); meanwhile, the driving mechanism is arranged in the shell (9) and is connected with one end of the drill bit (1), and the other end of the drill bit (1) extends out of the magnetic horn-shaped cover (2);
the drill bit (1) comprises a working part (102), wherein the working part (102) comprises a first working part (c), a second working part (d) and a third working part (e), the first working part (c), the second working part (d) and the third working part (e) are of an integrated structure, the third working part (e) is connected with the handle part of the drill bit (1), the first working part (c) is the end part of the drill bit, and the two ends of the second working part (d) are respectively connected with the first working part (c) and the third working part (e);
the first working part (c) is a twist drill, the second working part (d) is a common thread, the third working part (e) is a special-shaped thread, and the screwing directions of the three working parts are opposite to the screwing directions of the broken screws;
the major diameter of the special-shaped thread increases gradually from the junction of the third working part (e) and the second working part (d) to the end part; the sharpness of the profile of the special-shaped thread is gradually reduced from the junction of the third working part (e) and the second working part (d) to the end part;
the maximum diameter of the special-shaped thread is smaller than the small diameter of the broken screw.
2. The broken screw extraction device according to claim 1, wherein: the driving mechanism is a motor (6), and an output shaft of the motor (6) is connected with the drill bit (1); meanwhile, a chuck (3) is arranged between the motor (6) and the drill bit (1).
3. A broken screw extraction device according to claim 2, wherein: one end of the chuck (3) is a mounting end (301), the other end of the chuck is a screwing end (302), a transition section (303) is arranged between the mounting end (301) and the screwing end (302), and the transition section (303) and the mounting end (301) are of an integrated structure;
the transition section (303) is provided with external threads; the center hole is formed in one end of the screwing end (302), the threaded hole is formed in the other end of the screwing end, the threaded hole is connected with the external threads on the transition section (303) in a matched mode, the clamping spring (304) is installed in the center hole of the screwing end (302), and the clamping spring (304) is connected with the drill bit (1).
4. The broken screw extraction device according to claim 1, wherein: the air suction system comprises a fan motor (8), and an output shaft of the fan motor (8) is connected with a fan (7).
5. The broken screw extraction device according to claim 1, wherein: the shell (9) comprises an outer shell (902) and an inner shell (903), the inner shell (903) is arranged in the outer shell (902), an air outlet (901) is formed in the bottom of the outer shell (902), an air suction duct (905) is formed between the air outlet (901) and the inner shell (903), and the air outlet (901), the air suction duct (905) and the magnetic horn-shaped cover (2) are communicated; meanwhile, the air suction system is arranged at the bottom of the outer shell (902), and the driving mechanism is arranged at the bottom of the inner shell (903).
6. The broken screw extraction device according to claim 5, wherein: the magnetic horn-shaped cover (2) comprises a cover body (202) with a magnetic structure, an external thread (201) is arranged at the small end of the cover body (202), the external thread (201) is connected with an internal thread of the opening end of the outer shell body (902) in a matched mode, meanwhile, a filter screen (204) is arranged between the opening end of the outer shell body (902) and the external thread end of the cover body, and a sealing ring (203) is arranged between the filter screen (204) and the inner shell body (903).
7. The broken screw extraction device according to claim 5, wherein: the outer shell (902) and the inner shell (903) are fixedly connected through a connecting body (904).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810690432.8A CN108581953B (en) | 2018-06-28 | 2018-06-28 | Broken screw take-out device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810690432.8A CN108581953B (en) | 2018-06-28 | 2018-06-28 | Broken screw take-out device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108581953A CN108581953A (en) | 2018-09-28 |
| CN108581953B true CN108581953B (en) | 2024-03-19 |
Family
ID=63634961
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810690432.8A Active CN108581953B (en) | 2018-06-28 | 2018-06-28 | Broken screw take-out device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108581953B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109015531B (en) * | 2018-10-15 | 2020-05-12 | 安徽铸星机械制造有限公司 | Method for taking out broken-end screw |
| CN109176410A (en) * | 2018-10-27 | 2019-01-11 | 徐州巨业机械制造有限公司 | It is a kind of to facilitate the device for taking out disconnected arm screw |
| CN109464185A (en) * | 2019-01-07 | 2019-03-15 | 张树波 | A kind of orthopedic nail extractor convenient for taking out broken nail |
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| JP2011000648A (en) * | 2009-06-16 | 2011-01-06 | Chugoku Electric Power Co Inc:The | Shaft member removing tool and method for removing shaft member |
| CN201701293U (en) * | 2010-02-11 | 2011-01-12 | 上海创亿医疗器械技术有限公司 | Metal bone screw extractor |
| CN203831351U (en) * | 2014-02-26 | 2014-09-17 | 宁波博高国际贸易有限公司 | End-broken screw extractor |
| CN106976043A (en) * | 2017-05-17 | 2017-07-25 | 朱贝康 | A kind of dustless environment protecting electric hammer with dust catcher |
| CN206623054U (en) * | 2017-02-16 | 2017-11-10 | 张伟 | A kind of electric hammer dust guard |
| CN107349008A (en) * | 2017-07-12 | 2017-11-17 | 王丰岩 | Damage screw and take out drill bit and device |
| CN208575786U (en) * | 2018-06-28 | 2019-03-05 | 榆林学院 | A kind of disconnected screw withdrawing device |
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2018
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB361908A (en) * | 1929-12-28 | 1931-11-27 | Greenfield Tap & Die Corp | A device for extracting screws |
| US3850254A (en) * | 1972-07-06 | 1974-11-26 | R Hirdes | Suction device for extracting drill chippings |
| GB1431353A (en) * | 1972-07-06 | 1976-04-07 | Hirdes R | Dust etc removal from the vicinity of driven work tools |
| EP0451256A1 (en) * | 1989-11-02 | 1991-10-16 | Alden Corp | Broken bolt extractor. |
| CN101474096A (en) * | 2009-01-13 | 2009-07-08 | 上海创亿医疗器械技术有限公司 | Hole wall squeezed type bone-knitting screw extractor |
| JP2011000648A (en) * | 2009-06-16 | 2011-01-06 | Chugoku Electric Power Co Inc:The | Shaft member removing tool and method for removing shaft member |
| CN201701293U (en) * | 2010-02-11 | 2011-01-12 | 上海创亿医疗器械技术有限公司 | Metal bone screw extractor |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN108581953A (en) | 2018-09-28 |
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