CN201644814U - Main shaft of machine tool - Google Patents
Main shaft of machine tool Download PDFInfo
- Publication number
- CN201644814U CN201644814U CN2010201077489U CN201020107748U CN201644814U CN 201644814 U CN201644814 U CN 201644814U CN 2010201077489 U CN2010201077489 U CN 2010201077489U CN 201020107748 U CN201020107748 U CN 201020107748U CN 201644814 U CN201644814 U CN 201644814U
- Authority
- CN
- China
- Prior art keywords
- main shaft
- machine tool
- bearings
- bearing
- shaft body
- 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
The utility model provides a main shaft of a machine tool, which belongs to the technical field of the machine tool and comprises a main shaft body and bearings arranged at the two ends of the main shaft body. The main shaft is characterized in that: bearing sleeves are arranged at the two ends of the main shaft body, and are installed at the inner sides of the bearings at the two ends of the main shaft body; oil cavities are arranged on the inner circumferential surfaces of the bearing sleeves, and main shaft sleeves are sleeved at the peripheries of the bearing sleeves. The bearings are particularly bidirectional thrust angular contact ball bearings. With reasonable as well as simple structure, easy producing as well as manufacturing and high precision, the main shaft is beneficial for improving the processing precision of the machine tool and is particularly suitable for being used on occasions with large axial forces so as to meet the requirement of the NC (numerical control) machine tool for high processing precision. When in use, oil films are filled in the oil cavities between the main shaft body and the bearing sleeves and support rotation of the main shaft, so as to lead to stable rotation and little abrasion of the main shaft; in addition, the bearings provide high rigidity, and the service life is long.
Description
Technical field
The utility model relates to a kind of structure of machine tool chief axis, belongs to the machine tool technology field.
Background technology
Defectives such as machining accuracy of NC machine tool depends primarily on the precision of main shaft itself, and main shaft of numerical control machine tool in the market mainly adopts the hydraulic pressure main shaft of mechanical type rolling bearing and the research and development of my company, and the former precision is not high, wearing and tearing are big, service life is long.Though and latter's precision height, stable working shakes for a short time, axial stiffness is poor, is not suitable for the bigger occasion of axially loaded.
The utility model content
The purpose of this utility model is exactly the deficiency that exists at above-mentioned existing machine tool chief axis, and by the improvement to existing main shaft, provides a kind of good rigidly, precision height, the novel lathe main shaft that precision stability is good.
The purpose of this utility model realizes by the improvement to existing main shaft, machine tool chief axis, the bearing that comprises main shaft and be installed in the main shaft two ends, it is characterized in that the main shaft two ends are provided with bearing holder (housing, cover), bearing holder (housing, cover) is installed in the inboard of main shaft bearings at both ends, the inner peripheral surface of bearing holder (housing, cover) is provided with oil pocket, and bearing holder (housing, cover) is circumscribed with collar bush.
Described bearing is a bidirectional angular contact thrust ball bearing.
The utility model is rational in infrastructure simple, manufactures easily, and main shaft precision height helps improving the machining accuracy of lathe, particularly is applicable to the bigger occasion of axially loaded and satisfies the requirement of Digit Control Machine Tool machining high-precision.During use, be full of oil film in the oil pocket between main shaft and the bearing holder (housing, cover), by the rotation of oil film back shaft, make that the running of main shaft is steady, it is little to wear and tear, and bearing then provides stronger rigidity, long service life.
Description of drawings
Below in conjunction with accompanying drawing the specific embodiment of the present utility model is described in further detail:
Fig. 1 is a structural representation of the present utility model.
Among the figure: 1 main shaft, 2 collar bushes, 3 tail-hoods, 4 bearings, 5 bearing holder (housing, cover)s.
The specific embodiment
As shown in Figure 1, machine tool chief axis is made up of installations such as main shaft 1, collar bush 2, tail-hood 3, bearing 4, bearing holder (housing, cover)s 5, bearing 4 is installed at the two ends of main shaft 1, bearing holder (housing, cover) 5 is installed in the inboard of main shaft 1 bearings at both ends 4, establish oil pocket on the inner peripheral surface of bearing holder (housing, cover), bearing holder (housing, cover) periphery socket collar bush 2, tail-hood 3 is installed in the outside of main shaft 1 tail bearing 4.Described bearing is a bidirectional angular contact thrust ball bearing.
During use, be full of oil film in the oil pocket between main shaft 1 and the bearing holder (housing, cover) 5, by the rotation of oil film back shaft, main shaft 1 is axle systems of no abrasiveness with bearing holder (housing, cover) 5, combine the advantage of dynamic pressure and hydrostatic spindle and avoided the shortcoming of existing main shaft, bearing then provides stronger axial stiffness.This main axle unit has high accuracy, high efficiency, long service life, characteristics such as good rigidly, and than the rolling bearing axiality height of mechanical type main shaft, its axial rigidity is 150kg/1-1.5 μ m, the main shaft circular runout is 0.7-1 μ m.
Claims (2)
1. machine tool chief axis, the bearing that comprises main shaft and be installed in the main shaft two ends is characterized in that the main shaft two ends are provided with bearing holder (housing, cover), and bearing holder (housing, cover) is installed in the inboard of main shaft bearings at both ends, the inner peripheral surface of bearing holder (housing, cover) is provided with oil pocket, and the bearing holder (housing, cover) periphery is socketed with collar bush.
2. machine tool chief axis according to claim 1 is characterized in that described bearing is a bidirectional angular contact thrust ball bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201077489U CN201644814U (en) | 2010-01-28 | 2010-01-28 | Main shaft of machine tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201077489U CN201644814U (en) | 2010-01-28 | 2010-01-28 | Main shaft of machine tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201644814U true CN201644814U (en) | 2010-11-24 |
Family
ID=43110016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201077489U Expired - Fee Related CN201644814U (en) | 2010-01-28 | 2010-01-28 | Main shaft of machine tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201644814U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102019438A (en) * | 2010-11-26 | 2011-04-20 | 大连机床集团有限责任公司 | Spindle box with oil film damping sleeve auxiliary support |
| CN112122625A (en) * | 2020-09-15 | 2020-12-25 | 南京非云天电子商务有限公司 | Intelligent manufacturing cutting machine tool device capable of avoiding increase of resistance of main shaft bearing |
-
2010
- 2010-01-28 CN CN2010201077489U patent/CN201644814U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102019438A (en) * | 2010-11-26 | 2011-04-20 | 大连机床集团有限责任公司 | Spindle box with oil film damping sleeve auxiliary support |
| CN112122625A (en) * | 2020-09-15 | 2020-12-25 | 南京非云天电子商务有限公司 | Intelligent manufacturing cutting machine tool device capable of avoiding increase of resistance of main shaft bearing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101124 Termination date: 20120128 |