CN102189302B - Screw tap overload protection device - Google Patents
Screw tap overload protection device Download PDFInfo
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- CN102189302B CN102189302B CN 201110144794 CN201110144794A CN102189302B CN 102189302 B CN102189302 B CN 102189302B CN 201110144794 CN201110144794 CN 201110144794 CN 201110144794 A CN201110144794 A CN 201110144794A CN 102189302 B CN102189302 B CN 102189302B
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- screw tap
- tap
- knife
- screw
- square hole
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Abstract
The invention discloses a screw tap overload protection device. The screw tap overload protection device comprises a knife handle, wherein a transmission sleeve is sleeved outside the knife handle in a sliding manner; the conical bottom part of the knife handle extends out of the bottom of the transmission sleeve; a waist-shaped slot is arranged on the knife handle; a bolt passes through the transmission sleeve and extends into the waist-shaped groove of the knife handle to connect the transmission sleeve and the knife handle; a nut sleeve is sleeved outside the transmission sleeve; a screw tap chuck is mounted below the transmission sleeve in the nut sleeve; a square hole is arranged in the middle of the screw tap chuck; the two sides of the upper end of the middle square hole in the screw tap chuck are provided with an adjusting screw respectively; the inner side of each adjusting screw is provided with a steel ball; a compression spring sleeved on each adjusting screw exactly pushes against the corresponding steel ball; multiple small holes are uniformly arranged on the periphery of the upper end surface of the screw tap chuck; the lower end of the transmission sleeve is provided with a plurality of strip holes dead against the multiple small holes; and a ball column pushed by the corresponding compression spring is mounted in each strip hole. The screw tap overload protection device disclosed by the invention can automatically protect a screw tap and avoid the screw tap from being broken under the condition that the torque of the screw tap is increased, thereby reducing the production cost.
Description
Technical field
The present invention mainly is a kind of overload protection device for screw tap.
Background technology
A kind of gasoline engine cylinder body end face cylinder cap that our company produces connects the M9 screwed hole; attack dark 92; aperture counterbore φ 10 dark 55; the tapping of the work in-process heart; because screw thread is very dark in the hole, tapping length is long again, often can occur that the screw tap moment of torsion increases and situation that quilt is fractureed; bother and take out screw tap, screw tap can not be got out and is just caused whole cylinder block to be scrapped.Existing gasoline engine processing screw tap mostly adopts the import screw tap, and screw tap fractures and adds that cylinder block scraps, so that production cost increases.
Summary of the invention
Technical problem to be solved by this invention provides a kind of overload protection device for screw tap, and its structural design is ingenious rationally, can automatically protect screw tap in the situation that the screw tap moment of torsion increases, and avoids screw tap to fracture, and reduces production costs.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
A kind of overload protection device for screw tap includes handle of a knife, the tapered structure in the bottom of described handle of a knife, and the outer slip cap of described handle of a knife has a drive sleeve, and the conical lower portion of described handle of a knife is stretched out from the drive sleeve bottom surface; Have a waist type groove on the described handle of a knife, have bolt to pass in the waist type groove that drive sleeve extend into handle of a knife drive sleeve is connected with handle of a knife; Described drive sleeve overcoat has a nut sleeve, by locking nut drive sleeve and nut sleeve is fastenedly connected; The below that is positioned at drive sleeve in the described nut sleeve is equipped with a tap chuck by promoting ball bearing, have a square hole in the middle of the described tap chuck, the conical lower portion of described handle of a knife faces the center of square hole, the upper end diameter of described square hole is less than lower end diameter, and square hole upper end diameter size matches with screw tap; The both sides of square hole upper end are separately installed with adjustment screw in the middle of being positioned in the described tap chuck, and there is respectively steel ball the inboard of adjustment screw, and cover has Compress Spring on the described adjustment screw, and Compress Spring just in time withstands on the steel ball; The periphery of described tap chuck upper surface on average has several apertures; Several apertures that the lower end of described drive sleeve faces the tap chuck upper surface have several bar holes, be separately installed with the ball head column that is withstood by holddown spring in described several bar holes, the lower of described ball head column corrects on the aperture that withstands on the tap chuck upper surface.
The diameter of the aperture ratio ball head column of the aperture of described tap chuck upper surface is slightly little.
The screw tap square toes are arranged in the square hole in the middle of the tap chuck; The conical lower portion of handle of a knife faces the screw tap square toes in the square hole; The steel ball of both sides, tap chuck interior square hole upper end is clamping screw tap square toes just in time.
To be milled with waist type groove be for can the up-down adjustment handle of a knife and the axial location of drive sleeve, so that handle of a knife lower end pyramidal structure is withstood the position suitable of screw tap square toes in the square hole in handle of a knife upper bolt junction among the present invention.Steel ball plays clamping action to the screw tap square toes, and the size of chucking power is adjusted the pressure of Compress Spring and realized by adjustment screw.
Mode of operation of the present invention is:
Machine tool chief axis drives the handle of a knife rotation, drive the drive sleeve rotation by bolt, under normal moment of torsion, the bulb of several ball head columns is pressed in several apertures of tap chuck upper surface (aperture ratio bulb diameter is slightly little) all the time, it can be stirred tap chuck and rotate together, the screw tap square toes are arranged in the tap chuck square hole, can drive the screw tap rotation, carry out tapping.At the bottom of screw tap is run into the hole or during other foreign matters, moment of torsion increases, ball head column just slides at the end face of tap chuck, the collar of tap chuck and thrust ball bearing is stopped the rotation, and the loose ring of thrust ball bearing continues rotation with nut sleeve, drive sleeve, skidding occurs, at this moment restart the machine tool chief axis counter-rotating, make screw tap withdraw from workpiece.When adjusting the tap chuck breakaway torque, the releasable lock jack panel overlaps the pressure that distance is up and down controlled holddown spring with adjusting nut, thus the moment of torsion that change ball head column and tap chuck skid.Adjust completely, locking nut is screwed, nut sleeve is locked.
Advantage of the present invention is:
Structural design of the present invention is ingenious rationally, can automatically protect screw tap in the situation that the screw tap moment of torsion increases, and avoids screw tap to fracture, and reduces production costs.
Description of drawings
Fig. 1 is cutaway view of the present invention.
Fig. 2 is E-E cutaway view of the present invention.
Fig. 3 is F-F cutaway view of the present invention.
Fig. 4 is the structural representation of waist type groove on the handle of a knife of the present invention.
The specific embodiment
Referring to Fig. 1,2,3,4, a kind of overload protection device for screw tap includes handle of a knife 1, the tapered structure in the bottom of described handle of a knife 1, and described handle of a knife 1 outer slip cap has a drive sleeve 3, and the conical lower portion of described handle of a knife 1 is stretched out from drive sleeve 3 bottom surfaces; Have a waist type groove 13 on the described handle of a knife 1, have bolt 2 to pass that waist type groove that drive sleeve 3 extend into handle of a knife 13 is interior to be connected drive sleeve 3 with handle of a knife 1; Described drive sleeve 3 overcoats have a nut sleeve 12, by locking nut 4 drive sleeve 3 and nut sleeve 12 are fastenedly connected; The below that is positioned at drive sleeve 3 in the described nut sleeve 12 is equipped with a tap chuck 7 by promoting ball bearing 11, have a square hole 14 in the middle of the described tap chuck 7, the conical lower portion of described handle of a knife 1 faces the center of square hole, the upper end diameter of described square hole 14 is less than lower end diameter, and square hole 14 upper end diameter size matches with screw tap; The both sides of square hole 14 upper ends are separately installed with adjustment screw 10 in the middle of being positioned in the described tap chuck, and there is respectively steel ball 8 inboard of adjustment screw 10, and cover has Compress Spring 9, Compress Spring 9 just in time to withstand on the steel ball 8 on the described adjustment screw 10; The periphery of described tap chuck 7 upper surfaces on average has several apertures; Several apertures that the lower end of described drive sleeve 3 faces tap chuck 7 upper surfaces have several bar holes, be separately installed with the ball head column 6 that is withstood by holddown spring 5 in described several bar holes, the lower of described ball head column 6 corrects on the aperture that withstands on tap chuck 7 upper surfaces.
The diameter of the aperture ratio ball head column 6 of the aperture of described tap chuck 7 upper surfaces is slightly little.
The screw tap square toes are arranged in the square hole in the middle of the tap chuck; The conical lower portion of handle of a knife 1 faces the screw tap square toes in the square hole; The steel ball 8 of both sides, tap chuck 7 interior square hole upper end is clamping screw tap square toes just in time.
Claims (3)
1. an overload protection device for screw tap includes handle of a knife, and the tapered structure in the bottom of described handle of a knife is characterized in that: the outer slip cap of described handle of a knife has a drive sleeve, and the conical lower portion of described handle of a knife is stretched out from the drive sleeve bottom surface; Have a waist type groove on the described handle of a knife, have bolt to pass in the waist type groove that drive sleeve extend into handle of a knife drive sleeve is connected with handle of a knife; Described drive sleeve overcoat has a nut sleeve, by locking nut drive sleeve and nut sleeve is fastenedly connected; The below that is positioned at drive sleeve in the described nut sleeve is equipped with a tap chuck by promoting ball bearing, have a square hole in the middle of the described tap chuck, the conical lower portion of described handle of a knife faces the center of square hole, Width lower end, the upper end width of described square hole is little, and square hole upper end width size matches with screw tap; The both sides of square hole upper end are separately installed with adjustment screw in the middle of being positioned in the described tap chuck, and there is respectively steel ball the inboard of adjustment screw, and cover has Compress Spring on the described adjustment screw, and Compress Spring just in time withstands on the steel ball; The periphery of described tap chuck upper surface on average has several apertures; Several apertures that the lower end of described drive sleeve faces the tap chuck upper surface have several bar holes, be separately installed with the ball head column that is withstood by holddown spring in described several bar holes, the lower of described ball head column corrects on the aperture that withstands on the tap chuck upper surface.
2. a kind of overload protection device for screw tap according to claim 1, it is characterized in that: the diameter of the aperture ratio ball head column of the aperture of described tap chuck upper surface is slightly little.
3. a kind of overload protection device for screw tap according to claim 1 is characterized in that: the screw tap square toes are arranged in the square hole in the middle of the tap chuck; The conical lower portion of handle of a knife faces the screw tap square toes in the square hole; The steel ball of both sides, tap chuck interior square hole upper end is clamping screw tap square toes just in time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110144794 CN102189302B (en) | 2011-05-31 | 2011-05-31 | Screw tap overload protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110144794 CN102189302B (en) | 2011-05-31 | 2011-05-31 | Screw tap overload protection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102189302A CN102189302A (en) | 2011-09-21 |
| CN102189302B true CN102189302B (en) | 2013-04-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110144794 Active CN102189302B (en) | 2011-05-31 | 2011-05-31 | Screw tap overload protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102189302B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103707228B (en) * | 2013-12-26 | 2016-02-10 | 杭州潘工工具有限公司 | A kind of Multifunctional die tap wrench |
| CN109465505B (en) * | 2018-12-30 | 2023-09-22 | 广西玉柴机器股份有限公司 | Safe broken-wire-preventing cone chuck |
| CN112025002A (en) * | 2020-08-27 | 2020-12-04 | 北京俊南庆鑫物业管理有限公司 | Tapping clamp of numerical control milling machine |
| CN114515873B (en) * | 2022-03-04 | 2023-05-05 | 湖南精琢科技有限公司 | Full-automatic tapping machine for metal manufacturing |
| CN116372487B (en) * | 2023-05-24 | 2023-10-20 | 广州中益机械有限公司 | Automobile part clamping mechanism suitable for small-space spot welding |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1204482A (en) * | 1966-11-14 | 1970-09-09 | Clydeside Machine Tool Company | An improved device for the attachment of tools for tapping and studding operations to power operated drilling and like machines |
| GB1291146A (en) * | 1970-09-15 | 1972-09-27 | Masakazu Matsumoto | Tap chucks |
| US5409322A (en) * | 1992-09-28 | 1995-04-25 | Matsuura Machinery Co., Ltd. | Apparatus for holding tools |
| CN2504024Y (en) * | 2001-09-25 | 2002-08-07 | 柏雪兵 | Tapping attachment |
| CN202137477U (en) * | 2011-05-31 | 2012-02-08 | 滁州兴达机电有限公司 | Overload protection device for screw tap |
-
2011
- 2011-05-31 CN CN 201110144794 patent/CN102189302B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1204482A (en) * | 1966-11-14 | 1970-09-09 | Clydeside Machine Tool Company | An improved device for the attachment of tools for tapping and studding operations to power operated drilling and like machines |
| GB1291146A (en) * | 1970-09-15 | 1972-09-27 | Masakazu Matsumoto | Tap chucks |
| US5409322A (en) * | 1992-09-28 | 1995-04-25 | Matsuura Machinery Co., Ltd. | Apparatus for holding tools |
| CN2504024Y (en) * | 2001-09-25 | 2002-08-07 | 柏雪兵 | Tapping attachment |
| CN202137477U (en) * | 2011-05-31 | 2012-02-08 | 滁州兴达机电有限公司 | Overload protection device for screw tap |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102189302A (en) | 2011-09-21 |
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