CN203509067U - Ball main shaft - Google Patents
Ball main shaft Download PDFInfo
- Publication number
- CN203509067U CN203509067U CN201320575778.6U CN201320575778U CN203509067U CN 203509067 U CN203509067 U CN 203509067U CN 201320575778 U CN201320575778 U CN 201320575778U CN 203509067 U CN203509067 U CN 203509067U
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- CN
- China
- Prior art keywords
- main shaft
- shaft body
- ball
- knife
- conical
- 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.)
- Expired - Fee Related
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Abstract
A ball main shaft comprises a main shaft body and a knife handle which is fixedly arranged on the main shaft body end face of the main shaft body, the main shaft body end face of the main shaft body is provided with a main shaft body conical hole facing the inside of the main shaft body, the middle of the knife handle is provided with a conical locating protrusion which is fixed in the main shaft body conical hole, a layer of roll balls are arranged between the conical locating protrusion and the main shaft body conical hole, and all the roll balls have the same diameter which is 3-12 microns; the conical locating protrusion has the taper which is 7/24; the end, close to the knife handle, of the conical locating protrusion is provided with a knife handle flange. The ball main shaft is simple in structure and obvious in effect, the end face of the main shaft body and the conical face of the main shaft body conical hole are located simultaneously in a contacted mode, rigidity and high-speed performance are good, the main shaft body can not expand, and a bearing is not affected. Deformation of a contact area is large, and a knife rod jumps slightly.
Description
Technical field
The utility model relates to ball main shaft, and it is between a kind of taper shank and main shaft, to be provided with the main shaft of ball, belongs to mechanical field.
Background technology
Machine tool chief axis refers to the axle that drives workpiece or cutter rotation on lathe, conventionally by main shaft, bearing and driving member etc., forms spindle unit.In machine, be mainly used to support driving parts as gear, belt wheel, transmit motion and moment of torsion, as machine tool chief axis; What have is used for clamping workpiece, as axle.Most of lathes have spindle unit.The kinematic accuracy of spindle unit and the rigidity of structure are the key factors that determines crudy and stock-removing efficiency.The index of weighing spindle unit performance is mainly running accuracy, rigidity and velocity adaptive.1. running accuracy: beat affecting occur in the direction of machining accuracy radial and axial during main shaft rotation, depend mainly on manufacture and the assembly quality of main shaft and bearing.2. dynamic and static rigidity: depend mainly on the bending stiffness of main shaft, the rigidity of bearing and damping.3. velocity adaptive: the maximum speed of permission and the range of speeds, depend mainly on the structure of bearing and lubricated, and radiating condition.
The handle of a knife of current machine tool chief axis is generally cone shape, by establish driving key or keyway on the surface of handle of a knife, and driving key and keyway engaging, when work, realize transmission, but traditional like this kind of drive can cause dynamic equilibrium problems, cause the precision of processing to be difficult to control.
Summary of the invention
In order to solve the problem of above-mentioned existence, the utility model discloses a kind of ball main shaft, the main shaft end face of this main shaft is provided with spindle taper hole, handle of a knife can be fixed therein, and forms virtual cone, in the course of work by ball, under pulling force effect, ball generation strain
Ball main shaft, comprise main shaft and handle of a knife, handle of a knife is fixed on the main shaft end face of main shaft, the spindle end of main shaft is provided with spindle taper hole towards main shaft inside, in the middle of handle of a knife, be provided with circular cone positioning convex, circular cone positioning convex is fixed in spindle taper hole, has one deck ball between circular cone positioning convex and spindle taper hole, and all ball diameters are identical.
Described circular cone positioning convex is 7/24 tapering, and the diameter of ball is 3 ~ 12 μ m.
Described circular cone positioning convex is provided with handle of a knife flange near shank end.
The utility model, simple in structure, guarantee that ball diameter is identical, when having realized main shaft end face with the spindle taper hole conical surface, contact location, rigidity and high speed performance are good, and main shaft can not expand, on not impact of bearing; Contact zone distortion is large, and virtual tapering and spindle taper hole are very close to each other, so knife bar is beated little; The axial force that pull bar produces is little in the loss of contact tapering, and the pressure that is therefore applied to cutter shaft contact end face is large, and contact-making surface frictional force increases, and can be used to a certain extent transmitting torque, substitutes the effect of driving key, can cancel key, there is good dynamic balance performance.Under draw-bar pull 25kN effect, if contact-making surface coefficient of friction is 0.35, No. 50 cones connect transferable torque up to 360N
.m, is greater than the required torque of conventional milling, can cancel driving key.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model,
Reference numerals list: 1-handle of a knife, 2-main shaft end face, 3-ball, 4-main shaft, 5-handle of a knife flange, 6-spindle taper hole, 7-circular cone positioning convex.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, further illustrate the utility model.Should understand the following specific embodiment and only for the utility model is described, be not used in restriction scope of the present utility model.It should be noted that, word 'fornt', 'back', " left side ", " right side ", "up" and "down" that use is described below refer to the direction in accompanying drawing, and word " interior " and " outward " refer to respectively the direction towards or away from specific features geometric center.
Visible by reference to the accompanying drawings, this ball main shaft, comprise main shaft 4 and handle of a knife 1, handle of a knife 1 is fixed on the main shaft end face 2 of main shaft 4, and the main shaft end face 2 of main shaft 4 is provided with spindle taper hole 6 towards main shaft 4 inside, is provided with circular cone positioning convex 7 in the middle of handle of a knife 1, circular cone positioning convex 7 is fixed in spindle taper hole 6, between circular cone positioning convex 7 and spindle taper hole 6, have one deck ball 3, all ball 3 diameters are identical, and the diameter of ball 3 is 3 ~ 12 μ m; Circular cone positioning convex 7 is 7/24 tapering; Circular cone positioning convex 7 is provided with handle of a knife flange 5 near handle of a knife 1 end.
The utility model, the beneficial effect reaching: contact location when having realized main shaft end face 2 with spindle taper hole 6 conical surface, rigidity and high speed performance are good, and main shaft 4 can not expand, on not impact of bearing; Contact zone distortion is large, and virtual tapering and spindle taper hole are very close to each other, so knife bar is beated little; The axial force that pull bar produces is little in the loss of contact tapering, and the pressure that is therefore applied to cutter shaft contact end face is large, and contact-making surface frictional force increases, and can be used to a certain extent transmitting torque, substitutes the effect of driving key, can cancel key, there is good dynamic balance performance.Under draw-bar pull 25kN effect, if contact-making surface coefficient of friction is 0.35, No. 50 cones connect transferable torque up to 360N
.m, is greater than the required torque of conventional milling, can cancel driving key.
The disclosed technological means of the utility model scheme is not limited only to the disclosed technological means of above-mentioned technological means, also comprises the technical scheme being comprised of above technical characterictic.
Claims (3)
1. ball main shaft, it is characterized in that comprising main shaft and handle of a knife, handle of a knife is fixed on the main shaft end face of main shaft, the spindle end of main shaft is provided with spindle taper hole towards main shaft inside, in the middle of handle of a knife, be provided with circular cone positioning convex, circular cone positioning convex is fixed in spindle taper hole, has one deck ball between circular cone positioning convex and spindle taper hole, and all ball diameters are identical.
2. ball main shaft according to claim 1, is characterized in that described circular cone positioning convex is 7/24 tapering, and the diameter of ball is 3 ~ 12 μ m.
3. ball main shaft according to claim 1, is characterized in that described circular cone positioning convex is provided with handle of a knife flange near shank end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320575778.6U CN203509067U (en) | 2013-09-17 | 2013-09-17 | Ball main shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320575778.6U CN203509067U (en) | 2013-09-17 | 2013-09-17 | Ball main shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203509067U true CN203509067U (en) | 2014-04-02 |
Family
ID=50368049
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320575778.6U Expired - Fee Related CN203509067U (en) | 2013-09-17 | 2013-09-17 | Ball main shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203509067U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108481023A (en) * | 2018-04-18 | 2018-09-04 | 上海新山田精密刀具有限公司 | Taper connects handle of a knife |
-
2013
- 2013-09-17 CN CN201320575778.6U patent/CN203509067U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108481023A (en) * | 2018-04-18 | 2018-09-04 | 上海新山田精密刀具有限公司 | Taper connects handle of a knife |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140402 Termination date: 20140917 |
|
| EXPY | Termination of patent right or utility model |