CN102765003A - Clamping structure for shaft parts - Google Patents
Clamping structure for shaft parts Download PDFInfo
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- CN102765003A CN102765003A CN2012102590451A CN201210259045A CN102765003A CN 102765003 A CN102765003 A CN 102765003A CN 2012102590451 A CN2012102590451 A CN 2012102590451A CN 201210259045 A CN201210259045 A CN 201210259045A CN 102765003 A CN102765003 A CN 102765003A
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- sleeve
- main shaft
- pull bar
- thrust
- bar
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Abstract
The invention provides a clamping structure for shaft parts, which is convenient for the alignment of a device and a tip, good in centering precision, capable of ensuring the machining precision and good in adaptability to lengths of the shaft parts. The clamping structure comprises a main shaft, a thrust sleeve, a tip, a rod, a pull rod, a thin film, a clamping jaw and a support, wherein the front end of the main shaft is provided with the thin film, the front end of the thin film is provided with the clamping jaw and the support, the main shaft is provided with a through centre locating hole, the centre locating hole is internally provided with the thrust sleeve and the pull rod, the front end of the pull rod is firmly connected with the back end of the thrust sleeve, and the tail part of the pull rod is externally connected with a thrust cylinder. The clamping structure is characterized in that the centre of the thrust sleeve is provided with a splined through slot, a centering sleeve is correspondingly embedded in the splined through slot, the outer arc surface of the centering sleeve is closely clung to the inner annular surface of the main shaft, and the centre of the centering sleeve is provided with a taper hole.
Description
Technical field
The present invention relates to the technical field of part clamp structure, be specially the clamp structure that is used for axial workpiece.
Background technology
The clamp structure of existing axial workpiece, its structure is seen Fig. 1, it comprises main shaft 1; Main shaft 1 has the central shaft locating hole that runs through; The afterbody of workpiece 6 by top 3 centering, top in thrust sleeve 2 slidably, the pin 10 that is loaded on the thrust sleeve 2 slides in top 3 groove 11; Top 3 stroke determines that by the length of himself groove 11 pin 10 can prevent top rotation simultaneously.Top 3 afterbodys have spring 12, and spring 12 is pressed in bar 5 heads, and bar 5 is fastening all-in-one-pieces with pull bar 4 afterbodys, make top 3 withstand on workpiece 6 tail end centre bores power provide by spring 12.
In the time will workpiece being installed, pull bar 4 moves forward under the effect of rear end oil cylinder power, promotes thrust sleeve 2, and thrust sleeve 2 pushes away film 7, makes diaphragm deformation, and claw 8 opens.Pull bar 4 is in the process that moves, and top 3 also move right simultaneously.Insert workpiece 6 then, workpiece 6 end faces come to support and stopped axially-movable at 9 o'clock.At this moment top 3 withstand the centre bore of workpiece 6 afterbodys.Then, pull bar 4 moves under the effect of oil cylinder power backward, also moves backward with pull bar 4 fastening thrust sleeves 2, and thrust sleeve 2 is thrown off with film 7.At this moment top 3 since spring force still withstand workpiece 6, top 3 with thrust sleeve 2 between relatively the slip.Do not had external force on the film 7, film 7 is adorned claw 8 clamping work pieces 6 cylindricals on it in the process that returns to original shape.
The process of this clamping workpiece exists following not enough:
1, after workpiece inserts main shaft, be difficult for aiming at top.Because consider the adaptation to the different-diameter workpiece, the diameter of thrust sleeve endoporus is bigger with respect to workpiece.When the diameter of workpiece hour, aims at top difficulty;
2, slide relatively between the top and thrust sleeve, the gap that cooperates between them is bigger, and thrust sleeve also is a matched in clearance with cooperating of main shaft on the other hand, causes top coaxial relatively poorly with main shaft, has a strong impact on centering precision;
3, spring force can diminish in the process that clamps, because this type of workpiece generally is manual loading and unloading, inserting the spring force of workpiece when being close to support can not be bigger, otherwise operator's working strength is too big.After inserting workpiece, in the process of clamping, pull bar drives bar and moves backward, and top motionless, spring force diminishes, and the power of top top workpiece diminishes, and makes the location of workpiece afterbody loose, and whipping is bigger during the workpiece rotation, influences machining accuracy;
4, when workpiece more in short-term, top will stretching out very longly just can be withstood the workpiece afterbody, at this moment top painstaking position is far away from the position that cooperates with thrust sleeve, centering precision decreases again.At this moment spring is also stretched longlyer, and top power to workpiece might be too small, and this structure is not enough to the adaptability of length workpiece.
Summary of the invention
To the problems referred to above, the invention provides the clamp structure that is used for axial workpiece, it makes workpiece and top aligning is convenient, centering precision is good, has guaranteed machining accuracy, and can be good to the adaptability of the length of axial workpiece.
The clamp structure that is used for axial workpiece, its technical scheme is such: it comprises main shaft, thrust sleeve, top, bar, pull bar, film, claw, support, and the front end of said main shaft is provided with film; The front end of said film is provided with claw, support, and said main shaft has the center positioning hole that runs through, and is provided with thrust sleeve, pull bar in the said center positioning hole; The front end of said pull bar is fastenedly connected the rear end of said thrust sleeve, and the external push action cylinder of the afterbody of said pull bar is characterized in that: the center of said thrust sleeve has the spline groove; The centring sleeve correspondence is flush-mounted in said spline groove; And the exterior arc surface of said centring sleeve is close to the interior anchor ring of said main shaft, and the center of said centring sleeve has taper hole, and said top tip is set in the said taper hole; And expose at the tip and towards said film; Said top afterbody is set in the adapter sleeve, is provided with the gap between the afterbody front end face of said top tail end face and said adapter sleeve, and said adapter sleeve is positioned at the centre bore of said pull bar; Be top-loaded with spring between the front end face of said adapter sleeve and the rear end face of said centring sleeve; The tail end of said adapter sleeve is fastenedly connected bar, and said bar is positioned at the centre bore of said pull bar, and said bar, both afterbodys of pull bar do not connect.
After adopting structure of the present invention, it has following beneficial effect:
1, workpiece centering parts and thrust part are relatively independent.Main shaft, centring sleeve, top, spring, cover, bar are formed the centering parts, thrust sleeve and pull bar composition thrust part, and its relay cylinder power makes deformation of thin membrane.With structure was different in the past, pull bar and bar are got in touch with main shaft separately, and be relatively independent between them; Corresponding length different workpiece; Only need the front and back position of adjusting rod, thereby make it strong, can not influence top power because of the length of workpiece to workpiece to the length adaptability of workpiece; And, do not change in pull bar motion medi-spring power backward;
2, the taper hole of centring sleeve has the effect of guiding, and the workpiece tail end is prone to aim at top;
3, centring sleeve directly cooperates with the main shaft endoporus, has lacked one deck cooperation in the middle of than usual the structure, and has been taper fit between top and the centring sleeve, can make top higherly with axiality main shaft like this, and centering precision is better;
4, be taper fit between the top and centring sleeve, top position with respect to centring sleeve is fixed, and top painstaking part is very near from centring sleeve, stressed better, centering precision is high;
In sum, it makes workpiece and top aligning is convenient, centering precision is good, has guaranteed machining accuracy, and can be good to the adaptability of the length of axial workpiece.
Description of drawings
Fig. 1 is the structural representation of the clamp structure of existing axial workpiece;
Fig. 2 is a front view structural representation of the present invention;
Fig. 3 is the A-A cutaway view structural representation of Fig. 2.
The specific embodiment
See Fig. 2, Fig. 3, it comprises main shaft 1, thrust sleeve 2, top 4, bar 7, pull bar 5, film 9, claw 10, supports 11, and the front end of main shaft 1 is provided with film 9; The front end of film 9 is provided with claw 10, supports 11, and main shaft 1 has the center positioning hole that runs through, and is provided with thrust sleeve 2, pull bar 5 in the center positioning hole; The front end of pull bar 5 is fastenedly connected the rear end of thrust sleeve 2, the external push action cylinder of the afterbody of pull bar 5 (do not draw among the figure, belong to existing mature structure); The center, posterior segment of thrust sleeve 2 has spline groove 12, and centring sleeve 3 correspondences are flush-mounted in spline groove 12, and the exterior arc surface of centring sleeve 3 is close to the interior anchor ring of main shaft 1; The center of centring sleeve 3 has taper hole 14, and top 4 tip is set in the taper hole 14, and expose at the tip and towards film 9; Top 4 afterbody is set in the adapter sleeve 6, is provided with clearance D between the afterbody front end face of top 4 tail end face and adapter sleeve 6, and adapter sleeve 6 is positioned at the centre bore of pull bar 5; Be top-loaded with spring 13 between the rear end face of the front end face of adapter sleeve 6 and centring sleeve 3; The tail end of adapter sleeve 6 is fastenedly connected bar 7, and bar 7 is positioned at the centre bore of pull bar 5, and both afterbodys of bar 7, pull bar 5 do not connect.8 is workpiece among the figure.
Claims (1)
1. the clamp structure that is used for axial workpiece, it comprises main shaft, thrust sleeve, top, bar, pull bar, film, claw, support, the front end of said main shaft is provided with film; The front end of said film is provided with claw, support, and said main shaft has the center positioning hole that runs through, and is provided with thrust sleeve, pull bar in the said center positioning hole; The front end of said pull bar is fastenedly connected the rear end of said thrust sleeve, and the external push action cylinder of the afterbody of said pull bar is characterized in that: the center of said thrust sleeve has the spline groove; The centring sleeve correspondence is flush-mounted in said spline groove; And the exterior arc surface of said centring sleeve is close to the interior anchor ring of said main shaft, and the center of said centring sleeve has taper hole, and said top tip is set in the said taper hole; And expose at the tip and towards said film; Said top afterbody is set in the adapter sleeve, is provided with the gap between the afterbody front end face of said top tail end face and said adapter sleeve, and said adapter sleeve is positioned at the centre bore of said pull bar; Be top-loaded with spring between the front end face of said adapter sleeve and the rear end face of said centring sleeve; The tail end of said adapter sleeve is fastenedly connected bar, and said bar is positioned at the centre bore of said pull bar, and said bar, both afterbodys of pull bar do not connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210259045.1A CN102765003B (en) | 2012-07-25 | 2012-07-25 | Clamping structure for shaft parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210259045.1A CN102765003B (en) | 2012-07-25 | 2012-07-25 | Clamping structure for shaft parts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102765003A true CN102765003A (en) | 2012-11-07 |
| CN102765003B CN102765003B (en) | 2014-08-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210259045.1A Active CN102765003B (en) | 2012-07-25 | 2012-07-25 | Clamping structure for shaft parts |
Country Status (1)
| Country | Link |
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| CN (1) | CN102765003B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104029041A (en) * | 2014-06-23 | 2014-09-10 | 中国重汽集团大同齿轮有限公司 | End face drive type turning clamp for shaft parts |
| CN106112042A (en) * | 2016-07-22 | 2016-11-16 | 重庆美心翼申机械股份有限公司 | A kind of crank throw positioning fixture |
Citations (9)
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|---|---|---|---|---|
| US3681879A (en) * | 1970-03-10 | 1972-08-08 | Toyoda Machine Works Ltd | Head stock device for selective use between the dead center drive and the live center drive |
| CN88210824U (en) * | 1988-02-11 | 1988-11-02 | 刘其汉 | Brute force putting centre |
| US5662442A (en) * | 1995-04-14 | 1997-09-02 | Okuma Corporation | Tool clamping mechanism |
| JP2000117576A (en) * | 1998-10-08 | 2000-04-25 | Makino Milling Mach Co Ltd | Attachment main spindle device |
| CN2741715Y (en) * | 2004-12-02 | 2005-11-23 | 常州工业技术学院机电研究所 | Self contering clamp device for digital control cardan joint bell shell inner ball surface grinder |
| CN200948518Y (en) * | 2006-09-27 | 2007-09-19 | 成都宁江机床（集团）股份有限公司 | Secondary tool setting piece clamping device for small-modulus numeric control gear hobbing machine |
| CN202037349U (en) * | 2010-10-29 | 2011-11-16 | 无锡迪奥机械有限公司 | Clamping chuck of automatic lathe |
| CN102371374A (en) * | 2011-09-14 | 2012-03-14 | 无锡机床股份有限公司 | Special positioning tool for machining oil nozzle workpieces |
| CN202804756U (en) * | 2012-07-25 | 2013-03-20 | 无锡机床股份有限公司 | Clamping structure for shaft parts |
-
2012
- 2012-07-25 CN CN201210259045.1A patent/CN102765003B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3681879A (en) * | 1970-03-10 | 1972-08-08 | Toyoda Machine Works Ltd | Head stock device for selective use between the dead center drive and the live center drive |
| CN88210824U (en) * | 1988-02-11 | 1988-11-02 | 刘其汉 | Brute force putting centre |
| US5662442A (en) * | 1995-04-14 | 1997-09-02 | Okuma Corporation | Tool clamping mechanism |
| JP2000117576A (en) * | 1998-10-08 | 2000-04-25 | Makino Milling Mach Co Ltd | Attachment main spindle device |
| CN2741715Y (en) * | 2004-12-02 | 2005-11-23 | 常州工业技术学院机电研究所 | Self contering clamp device for digital control cardan joint bell shell inner ball surface grinder |
| CN200948518Y (en) * | 2006-09-27 | 2007-09-19 | 成都宁江机床（集团）股份有限公司 | Secondary tool setting piece clamping device for small-modulus numeric control gear hobbing machine |
| CN202037349U (en) * | 2010-10-29 | 2011-11-16 | 无锡迪奥机械有限公司 | Clamping chuck of automatic lathe |
| CN102371374A (en) * | 2011-09-14 | 2012-03-14 | 无锡机床股份有限公司 | Special positioning tool for machining oil nozzle workpieces |
| CN202804756U (en) * | 2012-07-25 | 2013-03-20 | 无锡机床股份有限公司 | Clamping structure for shaft parts |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104029041A (en) * | 2014-06-23 | 2014-09-10 | 中国重汽集团大同齿轮有限公司 | End face drive type turning clamp for shaft parts |
| CN104029041B (en) * | 2014-06-23 | 2016-06-15 | 中国重汽集团大同齿轮有限公司 | Axial workpiece end face drive-type automobile clamper |
| CN106112042A (en) * | 2016-07-22 | 2016-11-16 | 重庆美心翼申机械股份有限公司 | A kind of crank throw positioning fixture |
| CN106112042B (en) * | 2016-07-22 | 2018-08-21 | 重庆美心翼申机械股份有限公司 | A kind of crank throw positioning fixture |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102765003B (en) | 2014-08-27 |
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Address after: No. 189, Linghu Avenue, Wuxi Economic Development Zone, Jiangsu 214000 Patentee after: WUXI MACHINE TOOLS Co.,Ltd. Address before: 214161 No. 801 Qianhu Road, Hudai Industrial Park, Binhu District, Wuxi City, Jiangsu Province Patentee before: WUXI MACHINE TOOLS Co.,Ltd. |
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