CN101947658A - Machine tool chuck - Google Patents
Machine tool chuck Download PDFInfo
- Publication number
- CN101947658A CN101947658A CN 201010294166 CN201010294166A CN101947658A CN 101947658 A CN101947658 A CN 101947658A CN 201010294166 CN201010294166 CN 201010294166 CN 201010294166 A CN201010294166 A CN 201010294166A CN 101947658 A CN101947658 A CN 101947658A
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- CN
- China
- Prior art keywords
- expander
- main shaft
- chuck
- expansive
- tyre
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The invention discloses a machine tool chuck comprising a main shaft, a pressing cap and an expansive tyre, wherein an inner peripheral surface of one end of the main shaft is provided with a conical surface, the outer peripheral surface of the expansive tyre is matched with the conical surface, and the pressure cap is connected with the end of the main shaft by screw threads and is used for jacking up the outer end surface of the expansive tyre. Due to the adoption of the technical scheme, the invention uses simple and skillful connection of the screw threads and the conical surface, has the characteristics of large clamp force, good self-locking performance, high reliability and small axial size. Compared with the traditional chuck, the machine tool chuck is reduced by about 2/3, a problem on a large-diameter short-piece design space is solved, the space utilization rate of a machine tool is improved, and the invention has the advantages of good mechanism rigidity, large inner diameter of the expansive tyre, the characteristic of clamping large-sized workpieces, simple structure, convenience in processing, low cost and high automatic centering accuracy.
Description
Technical field
The present invention relates to a kind of machine tool component, particularly relate to a kind of machine chuck of holding workpiece.
Background technology
The most of tradition awl tooth transmission three-jaw centering chuck that adopts of the machine chuck of the holding workpiece on existing machinery formula or the digital control type machining tool main shaft, have following shortcoming: 1, its mechanism's complexity has three cover awl gear mechanisms in the chuck; 2, axial dimension is bigger, influences the design interval of lathe; 3, radial dimension is bigger, and it is less that the chuck maximum can be processed diameter parameters.
Development along with society, the production in enormous quantitiesization of part is more and more, and has all passed through The pre-heat treatment before the processing of most of workpiece, case hardness big (can reach HRC35), the workpiece aperture is big, and the short part of a lot of large apertures and length reaches the two ends cutting on common scroll chuck can't realize.And, influence the integral body cutting rigidity of lathe owing to size on the chuck axis is big.So traditional three-jaw centering chuck can't adapt to large-scale workpiece demands such as the short length of current processing, large aperture, high rigidity.
Summary of the invention
Technical problem to be solved by this invention provides that a kind of clamping is simple, convenient and rapid, and clamping force is big, and reliable operation can the machining large workpiece, the short machine chuck of axial dimension.
For solving the problems of the technologies described above, the present invention adopts following technical scheme: machine chuck, comprise main shaft, pressure cap, expander, the inner peripheral surface of described main shaft one end is provided with the conical surface, the described expander outer peripheral face and the described conical surface are complementary, and described pressure cap is by the end of the described main shaft that is threaded and the outer face of the described expander of roof pressure.
As preferably, be provided with plane spring between the inner face of described expander and the described main shaft, be provided with one groove in the described expander, be provided with piston ring in the described groove.
As preferably, described expander inner peripheral surface is provided with teeth, has increased clamping action.
As preferably, described expander is split type, comprises three uniform expanders, to increase its radiai adjustment scope.
As preferably, be evenly equipped with some cylindrical holes on the described pressure cap outer peripheral face, be used to assign the special spanner of rotation pressure cap.
The present invention utilizes the ingenious connection of simple screw thread, the conical surface owing to adopted technique scheme, and clamping force is big, and self-locking performance is good, the reliability height; Axial dimension is little, dwindles approximately 2/3 than traditional chuck, and the lathe space availability ratio has been improved in the design space that solves major diameter, short part; Mechanism's rigidity is good, and the expander internal diameter is big, has the characteristic that clamps large-scale workpiece; Chuck structure is simple, easy to process, cost is low, self-centering precision height.
Description of drawings
Fig. 1 is the structural representation of machine chuck of the present invention.
Fig. 2 is that A among Fig. 1 is to view.
The specific embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is further described.
Illustrated in figures 1 and 2 is machine chuck of the present invention, comprise main shaft 1, pressure cap 2, expander 3, the inner peripheral surface of described main shaft 1 one ends is provided with the conical surface 11, described expander 3 outer peripheral faces and the described conical surface 11 are complementary, and described pressure cap 2 is by the end of the described main shaft 1 that is threaded and the outer face of the described expander 3 of roof pressure.By being threaded on the screw thread on the main shaft and the pressure cap, all parts are installed on the main shaft, becoming one machine chuck.Inner conical surface on the main shaft combines with the male cone (strobilus masculinus) of expander, utilizes conical surface angle to change expander internal diameter size and comes clamping work pieces.
Be provided with plane spring 4 between the inner face of described expander 3 and the described main shaft 1, be provided with one groove 31 in the described expander 3, be provided with piston ring 5 in the described groove 31.Described plane spring is positioned at the expander bottom, and auxiliary expander toward extrapolation, reaches the effect of unclamping workpiece when unclamping workpiece.Described piston ring is arranged in the groove of expander inner ring, and expander is played a supportive role, and auxiliary simultaneously expander promotes when unclamping workpiece outward.The effect that its double action makes expander return automatically, unclamp when reaching the dismounting workpiece.
Described expander 3 inner peripheral surfaces are provided with teeth 32.Described expander 3 is split type, comprises three uniform expanders.Expander radiai adjustment scope is 2-3mm, the serial expander of the different big replaceable different wall of small workpiece of folder.
Be evenly equipped with some cylindrical holes 21 on described pressure cap 2 outer peripheral faces, be used to assign the special spanner of rotation pressure cap.
When unclamping pressure cap, expander slides under plane spring, piston ring effect outward, and the expander endoporus increases naturally.Workpiece is installed in the expander endoporus, in the small cylindrical opening on the special spanner insertion pressure cap external cylindrical surface, pull spanner, the reverse rotation pressure cap, this moment screw thread on pressure cap and main shaft cooperation under, pressure cap is moved inward, trim ring on the pressure cap promotes expander by the expander outer face and moves inward, while pressure planes spring, piston ring, the pressure cap male cone (strobilus masculinus) cooperates slip down with the main shaft inner conical surface, make expander past radially (center of circle) motion in (axially) motion inward, and the expander internal diameter dwindles, thereby make the teeth on the expander tightly push down the excircle of workpiece cylinder, reach the purpose of clamping work pieces.Behind the workpiece pressing, the pressure cap that stops the rotation takes out special spanner.Because threaded engagement has auto-lock function, the dual locking effects such as frictional force of trim ring on the pressure cap and expander outer face make piece-holder firm in addition, and are locking reliable.
The present invention is owing to adopted technique scheme, adopt the conical surface to match with self-locking thread, make less axial motive force be transformed into the bigger radial load of clamping work pieces, clamping force is big, and according to mechanics principle, clamping force is big more, self-lock ability is strong more, and simultaneously, the expander inner ring adopts circumferential teeth formula, strengthened the circumference clamping force, double effects makes chuck reach the clamping and the reliability of workpiece; Owing to use screw-threaded coupling mechanism, make that the axial dimension of chuck is little, dwindle approximately 2/3 than traditional chuck, improved the cutting rigidity of lathe greatly, improved the lathe space availability ratio; Because after clamping, by main shaft, pressure cap, expander and workpiece acting in conjunction, whole clamp mechanism rigidity is good, expander is frivolous, is strengthening under the main shaft endoporus, can have the characteristic that clamps large-scale workpiece so that the chuck internal diameter is big; Chuck structure is simple, easy and simple to handle, and is easy to process, cost is low, centering precision is high; Chuck belongs to the fine motion clamp mechanism, and the radiai adjustment scope is 2-3mm, and is swift to operate.
Claims (5)
1. machine chuck, it is characterized in that: comprise main shaft (1), pressure cap (2), expander (3), the inner peripheral surface of described main shaft (1) one end is provided with the conical surface (11), described expander (3) outer peripheral face and the described conical surface (11) are complementary, and described pressure cap (2) is by the end of the described main shaft (1) that is threaded and the outer face of the described expander of roof pressure (3).
2. according to the described machine chuck of claim 1, it is characterized in that: be provided with plane spring (4) between the inner face of described expander (3) and the described main shaft (1), be provided with one groove (31) in the described expander (3), be provided with piston ring (5) in the described groove (31).
3. according to the described machine chuck of claim 1, it is characterized in that: described expander (3) inner peripheral surface is provided with teeth (32).
4. according to the described machine chuck of claim 1, it is characterized in that: described expander (3) comprises three uniform expanders for split type.
5. according to the described machine chuck of claim 1, it is characterized in that: be evenly equipped with some cylindrical holes (21) on described pressure cap (2) outer peripheral face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010294166 CN101947658A (en) | 2010-09-26 | 2010-09-26 | Machine tool chuck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010294166 CN101947658A (en) | 2010-09-26 | 2010-09-26 | Machine tool chuck |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101947658A true CN101947658A (en) | 2011-01-19 |
Family
ID=43451355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010294166 Pending CN101947658A (en) | 2010-09-26 | 2010-09-26 | Machine tool chuck |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101947658A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104070196A (en) * | 2014-06-20 | 2014-10-01 | 周开雄 | Machine tool chuck with micro-displacement clamping function |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2346706A (en) * | 1943-05-04 | 1944-04-18 | Jacobs Mfg Co | Collet |
| GB587076A (en) * | 1944-10-18 | 1947-04-14 | Percy Blood | Improvements in and relating to chucks for machine tools |
| CN2170816Y (en) * | 1993-08-05 | 1994-07-06 | 李远坤 | Winding-spring type three gripper chuck |
| CN101415513A (en) * | 2006-04-02 | 2009-04-22 | 伊斯卡有限公司 | Chuck and article having mating features to prevent axial slippage |
| CN201833004U (en) * | 2010-09-26 | 2011-05-18 | 陈丰土 | Chuck of machine tool |
-
2010
- 2010-09-26 CN CN 201010294166 patent/CN101947658A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2346706A (en) * | 1943-05-04 | 1944-04-18 | Jacobs Mfg Co | Collet |
| GB587076A (en) * | 1944-10-18 | 1947-04-14 | Percy Blood | Improvements in and relating to chucks for machine tools |
| CN2170816Y (en) * | 1993-08-05 | 1994-07-06 | 李远坤 | Winding-spring type three gripper chuck |
| CN101415513A (en) * | 2006-04-02 | 2009-04-22 | 伊斯卡有限公司 | Chuck and article having mating features to prevent axial slippage |
| CN201833004U (en) * | 2010-09-26 | 2011-05-18 | 陈丰土 | Chuck of machine tool |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104070196A (en) * | 2014-06-20 | 2014-10-01 | 周开雄 | Machine tool chuck with micro-displacement clamping function |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20110119 |