CN102765003B - Clamping structure for shaft parts - Google Patents
Clamping structure for shaft parts Download PDFInfo
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- CN102765003B CN102765003B CN201210259045.1A CN201210259045A CN102765003B CN 102765003 B CN102765003 B CN 102765003B CN 201210259045 A CN201210259045 A CN 201210259045A CN 102765003 B CN102765003 B CN 102765003B
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- sleeve
- pull bar
- main shaft
- bar
- thrust
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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 for axial workpiece.
Background technology
The clamp structure of existing axial workpiece, its structure is shown in Fig. 1, it comprises main shaft 1, main shaft 1 has the central shaft locating hole running through, the afterbody of workpiece 6 is felt relieved by top 3, top in thrust sleeve 2 slidably, be loaded on pin 10 on thrust sleeve 2 in top 3 the interior slip of groove 11, top 3 stroke determines by the length of himself groove 11, and 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, and top 3 power that withstand on workpiece 6 tail end centre bores are provided 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 mobile process, and top 3 also move right simultaneously.Then insert workpiece 6, workpiece 6 end faces come to support and stop axially-movable at 9 o'clock.At this moment top 3 centre bores that withstand workpiece 6 afterbodys.Then, pull bar 4 moves backward under the effect of oil cylinder power, and the thrust sleeve 2 fastening with pull bar 4 also moves backward, and thrust sleeve 2 is thrown off with film 7.At this moment top 3 because spring force still withstands workpiece 6, top 3 and thrust sleeve 2 between relative sliding.On film 7, there is no external force, film 7, returning in the process of original shape, fills claw 8 clamping work pieces 6 cylindricals thereon.
The process of this clamping workpiece, exists following not enough:
1, workpiece inserts after main shaft, is difficult for aiming at top.Due to the adaptation of considering different-diameter workpiece, the diameter of thrust sleeve endoporus is larger with respect to workpiece.When the diameter of workpiece hour, it is top more difficult to aim at;
2, relative sliding between top and thrust sleeve, the Gap-Ratios coordinating between them is larger, and thrust sleeve is also matched in clearance with coordinating of main shaft on the other hand, causes top coaxially poorly with main shaft, has a strong impact on centering precision;
3, spring force can diminish in the process clamping, and because this type of workpiece is generally manual loading and unloading, inserting workpiece can not be larger to the spring force that is close to when support, otherwise operator's working strength is too large.Inserting after workpiece, in the process of clamping, pull bar driven rod moves backward, and top motionless, spring force diminishes, and the power of top top workpiece diminishes, and makes the location of workpiece afterbody more loose, and when workpiece rotation, whipping is larger, affects machining accuracy;
4, when workpiece more in short-term, toply to stretch out the very long workpiece afterbody that just can withstand, at this moment top painstaking position from the position coordinating with thrust sleeve away from, centering precision decreases again.At this moment spring is also stretched longlyer, top likely too small to the power of workpiece, the adaptability deficiency of this structure to length workpiece.
Summary of the invention
For the problems referred to above, the invention provides the clamp structure for axial workpiece, it makes, and workpiece and top aligning facilitate, centering precision is good, have guaranteed machining accuracy, and can be good to the adaptability of the length of axial workpiece.
For the clamp structure of axial workpiece, its technical scheme is such: it comprises main shaft, thrust sleeve, top, bar, pull bar, film, claw, support, the front end of described main shaft is provided with film, the front end of described film is provided with claw, support, described main shaft has the center positioning hole running through, in described center positioning hole, be provided with thrust sleeve, pull bar, the front end of described pull bar is fastenedly connected the rear end of described thrust sleeve, the external push action cylinder of afterbody of described pull bar, it is characterized in that: the center of described thrust sleeve has spline groove, centring sleeve correspondence is flush-mounted in described spline groove, and the exterior arc surface of described centring sleeve is close to the interior anchor ring of described main shaft, the center of described centring sleeve has taper hole, described top tip is set in described taper hole, and expose at tip and towards described film, described top afterbody is set in adapter sleeve, between the afterbody front end face of described top tail end face and described adapter sleeve, be provided with gap, described adapter sleeve is positioned at the centre bore of described pull bar, between the front end face of described adapter sleeve and the rear end face of described centring sleeve, be top-loaded with spring, the tail end of described adapter sleeve is fastenedly connected bar, described bar is positioned at the centre bore of described pull bar, described bar, both afterbodys of pull bar do not connect.
Adopt after 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 composition centering parts, thrust sleeve forms thrust part with pull bar, and its relay cylinder power makes deformation of thin membrane.From structure was different in the past, pull bar and bar contact with main shaft separately, relatively independent between them, the different workpiece of corresponding length, only need the front and back position of adjusting rod, thereby make it strong to the length adaptability of workpiece, can not affect the top power to workpiece because of the length 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 workpiece tail end is easily aimed at top;
3, centring sleeve directly coordinates with inner hole of spindle, has lacked one deck cooperation, and be taper fit between top and centring sleeve in the middle of structure than usual, can make so top highlyer with axiality main shaft, and centering precision is better;
4, between top and centring sleeve, be taper fit, the top position with respect to centring sleeve is fixed, top painstaking part from centring sleeve very close to, stressed better, centering precision is high;
in sum, it makes, and workpiece and top aligning facilitate, centering precision is good, have guaranteed machining accuracy, and can be good to the adaptability of the length of axial workpiece.
Brief description of the drawings
Fig. 1 is the structural representation of the clamp structure of existing axial workpiece;
Fig. 2 is front view structural representation of the present invention;
Fig. 3 is the A-A cutaway view structural representation of Fig. 2.
Detailed description of the invention
See Fig. 2, Fig. 3, it comprises main shaft 1, thrust sleeve 2, top 4, bar 7, pull bar 5, film 9, claw 10, support 11, the front end of main shaft 1 is provided with film 9, the front end of film 9 is provided with claw 10, support 11, main shaft 1 has the center positioning hole running through, in center positioning hole, be provided with thrust sleeve 2, pull bar 5, the front end of pull bar 5 is fastenedly connected the rear end of thrust sleeve 2, the external push action cylinder of afterbody of pull bar 5 is (not shown in FIG., belong to existing mature structure), the center, posterior segment of thrust sleeve 2 has spline groove 12, 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, top 4 tip is set in taper hole 14, and expose at tip and towards film 9, top 4 afterbody is set in adapter sleeve 6, between the afterbody front end face of top 4 tail end face and adapter sleeve 6, be provided with clearance D, adapter sleeve 6 is positioned at the centre bore of pull bar 5, between the rear end face of the front end face of adapter sleeve 6 and centring sleeve 3, be top-loaded with spring 13, the tail end of adapter sleeve 6 is fastenedly connected bar 7, bar 7 is positioned at the centre bore of pull bar 5, bar 7, both afterbodys of pull bar 5 do not connect.In figure, 8 is workpiece.
Claims (1)
1. for the clamp structure of axial workpiece, it comprises main shaft, thrust sleeve, top, bar, pull bar, film, claw, support, the front end of described main shaft is provided with film, the front end of described film is provided with claw, support, described main shaft has the center positioning hole running through, in described center positioning hole, be provided with thrust sleeve, pull bar, the front end of described pull bar is fastenedly connected the rear end of described thrust sleeve, the external push action cylinder of afterbody of described pull bar, it is characterized in that: the center of described thrust sleeve has spline groove, centring sleeve correspondence is flush-mounted in described spline groove, and the exterior arc surface of described centring sleeve is close to the interior anchor ring of described main shaft, the center of described centring sleeve has taper hole, described top tip is set in described taper hole, and expose at tip and towards described film, described top afterbody is set in adapter sleeve, between the afterbody front end face of described top tail end face and described adapter sleeve, be provided with gap, described adapter sleeve is positioned at the centre bore of described pull bar, between the front end face of described adapter sleeve and the rear end face of described centring sleeve, be top-loaded with spring, the tail end of described adapter sleeve is fastenedly connected described bar, described bar is positioned at the centre bore of described pull bar, described 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 CN102765003A (en) | 2012-11-07 |
| CN102765003B true CN102765003B (en) | 2014-08-27 |
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| 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) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4834066Y1 (en) * | 1970-03-10 | 1973-10-15 | ||
| CN88210824U (en) * | 1988-02-11 | 1988-11-02 | 刘其汉 | Brute force putting centre |
| JPH08281504A (en) * | 1995-04-14 | 1996-10-29 | Okuma Mach Works Ltd | Disconnecting machanism for tool clamp |
| JP3586381B2 (en) * | 1998-10-08 | 2004-11-10 | 株式会社牧野フライス製作所 | Attachment 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 |
| CN102371374B (en) * | 2011-09-14 | 2013-04-03 | 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 |
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2012
- 2012-07-25 CN CN201210259045.1A patent/CN102765003B/en active Active
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| CN102765003A (en) | 2012-11-07 |
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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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