CN105149620A - Main shaft structure for high-precision machine tool - Google Patents
Main shaft structure for high-precision machine tool Download PDFInfo
- Publication number
- CN105149620A CN105149620A CN201510519212.5A CN201510519212A CN105149620A CN 105149620 A CN105149620 A CN 105149620A CN 201510519212 A CN201510519212 A CN 201510519212A CN 105149620 A CN105149620 A CN 105149620A
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- CN
- China
- Prior art keywords
- main shaft
- bearing
- machine tool
- periphery
- axle structure
- 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.)
- Pending
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/70—Stationary or movable members for carrying working-spindles for attachment of tools or work
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/04—Headstocks; Working-spindles; Features relating thereto
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Support Of The Bearing (AREA)
Abstract
The invention relates to and provides a main shaft structure for a high-precision machine tool. The main shaft structure comprises a shell with a cavity. A main shaft penetrates the cavity of the shell. A plurality of first bearings and a plurality of second bearings are further connected in the cavity of the shell and connected to the periphery of the main shaft. The periphery of the part, between the first bearing on the innermost side and the second bearing, of the main shaft is sleeved with a space ring in a connected manner. The two ends of the shell are fixedly connected with end covers respectively. sealing rings are further arranged in step grooves in inner rings of the end covers. The part between the inner ring of at least one end cover and the periphery of the main shaft is further provided with a bearing locking adjusting piece. The bearing locking adjusting pieces are fixedly connected with the main shaft through fasteners. The main shaft structure has the beneficial effects of being high in precision and long in service life. Using of a high-precision lathe, a grinding machine and a numerical control machine tool can be effectively achieved, precision and rigidity are good, and good waterproof performance is achieved.
Description
Technical field
The present invention relates to machine tool, particularly relate to a kind of main axle structure for high precision machine tools such as smooth turning lathe, grinding machine and Digit Control Machine Tools.
Background technology
At present, the existing problem not high for the main axle structure ubiquity precision of high precision machine tool, should be 0.005 ~ 0.010mm for diameter in the precision of the high-precision grinder main shaft of about 170, and for diameter about 170 high precision lathe spindle precision should at more than 0.020mm, and existing machine tool chief axis precision all cannot reach above-mentioned requirements.In addition existing machine tool chief axis due to bearing select unreasonable, cause poor spindle rigidity, existing main shaft adopts felt seal mode simultaneously, this sealing means is unsuitable for Long-Time Service, main axle structure inside is very easily made to enter cooling fluid, cause main axle structure internal bearings to be damaged, greatly reduce the service life of main shaft, and original spring sealed circle easily produces heating problem to spindle abrasion and for the increase of running moment.Last existing main axle structure assemble time cannot Timeliness coverage bearing install quality, the quality that bearing is installed could be determined after main axle structure all installs, and dismounting inconvenience.
Summary of the invention
The applicant is for above-mentioned existing issue, be studied improvement, a kind of main axle structure for high precision machine tool is provided, this main axle structure has the advantage that precision is high, the life-span is long, it effectively meets the use of smooth turning lathe, grinding machine and Digit Control Machine Tool, precision good rigidly, and there is good water proofing property.
The technical solution adopted in the present invention is as follows:
A kind of main axle structure for high precision machine tool, comprise one with the housing of cavity, main shaft runs through the inside cavity being arranged on described housing, multiple clutch shaft bearing and the second bearing is also connected respectively, on main shaft between the clutch shaft bearing of inner side and the second bearing, be also socketed spacer ring in the periphery of described main shaft in the cavity of described housing, in the periphery of described main shaft; In the affixed end cap of the two ends of described housing difference, in the step groove at described end cap inner ring place, also sealing ring is installed, at least between the inner ring and the periphery of main shaft of an end cap, bearing locking trimmer is also installed, described bearing trimmer by securing member and main shaft affixed.
Its further technical scheme is:
Described housing is circular shell, along the circumferential direction evenly offers multiple threaded mounting hole in the periphery of described housing, the hold-down nut be spirally connected in described threaded mounting hole for compressing spacer ring;
Along the circumferential direction offer the first groove in the periphery of described main shaft, along the circumferential direction offer the second groove at the inwall of described housing, described first groove and the second groove to offer position corresponding each other;
Described clutch shaft bearing is angular contact ball bearing, and described second bearing is angular contact bearing, and each clutch shaft bearing abuts each other and is arranged on main shaft, and each second bearing also abuts each other and is arranged on main shaft;
Described sealing ring is skeleton rubber seal;
In the junction of described housing and end cap, in described end cap, go back mounting O-shaped sealing ring.
Beneficial effect of the present invention is as follows:
Structure of the present invention is simple, convenient disassembly, and it has the following advantages:
(1) mode by adopting bearing locking trimmer to replace original nut check bearing, nut check can be avoided to make the problem of matched bearings bias voltage, main shaft precise decreasing on the one hand, make main shaft after a long time use on the other hand, can, by the pretightning force regulating bearing locking trimmer to increase bearing, main shaft precision be made to keep optimum state.
(2) by adopting skeleton rubber seal to replace original felt seal, solve original spring sealed circle and the spindle heat generation problem caused is increased to the wearing and tearing of main shaft and running moment, adopt skeleton rubber seal that the running moment of main shaft is not increased, guarantee foreign, cooling fluid enter main shaft inside, substantially increase the main shaft life-span.
(3) the present invention adopts the mode that multi-joint high accuracy angular contact ball bearing and multi-joint high accuracy angular contact bearing coordinate, the rigidity of the main shaft of increase and bearing capacity.
(4) middle shell structure of the present invention is simple, easy to process, the assembling of itself and main shaft is quick and convenient, assemble with housing again after main shaft and bearing assemble simultaneously, utilize the quality of this assembling mode energy Rapid Detection bearing, make the installation of main axle structure quick and convenient, guarantee the quality of each bearing, ensure that the service life of main axle structure.
(5) the present invention by being evenly arranged threaded mounting hole on housing, and lock spacer ring by hold-down nut, avoids the situation that the stressed rear generation rigidity of main shaft reduces.
Accompanying drawing explanation
Fig. 1 is sectional structure schematic diagram of the present invention.
Wherein: 1, main shaft; 101, the first groove; 2, sealing ring; 3, end cap; 301, step groove; 4, housing; 401, threaded mounting hole; 402, the second groove; 5, clutch shaft bearing; 6, spacer ring; 7, the second bearing; 8, bearing locking trimmer; 9, hold-down nut; 10, clamping screw; 11, O RunddichtringO.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described.
As shown in Figure 1, a kind of main axle structure for high precision machine tool comprises one with the housing 4 of cavity, housing 4 is circular shell, main shaft 1 runs through the inside cavity being arranged on housing 4, in the cavity of housing 4, multiple clutch shaft bearing 5 and the second bearing 7 is also connected respectively in the periphery of main shaft 1, clutch shaft bearing 5 is angular contact ball bearing, second bearing 7 is angular contact bearing, each clutch shaft bearing 5 abuts each other and is arranged on main shaft 1, each second bearing 7 also abuts each other and is arranged on main shaft 1, in the present invention, clutch shaft bearing 5 is 4, second bearing 7 is 3 (quantity of clutch shaft bearing 5 and the second bearing 7 adjusts according to practical condition).As shown in Figure 1, on main shaft 1 between the clutch shaft bearing 5 of inner side and the second bearing 7, be also socketed spacer ring 6 in the periphery of main shaft 1, multiple threaded mounting hole 401 is along the circumferential direction evenly offered in the periphery of housing 4, the hold-down nut 9 be spirally connected in threaded mounting hole 401 for compressing spacer ring 6, utilize hold-down nut 9 to lock spacer ring 6, avoid the situation that the stressed generation rigidity of main shaft 1 reduces.As shown in Figure 1, fix end cap 3 in the two ends of housing 4 respectively by clamping screw 10, in the step groove 301 at end cap 3 inner ring place, also install sealing ring 2, sealing ring 2 is skeleton rubber seal.At least between the inner ring and the periphery of main shaft 1 of an end cap 3, bearing locking trimmer 8 is also installed, bearing locking trimmer 8 is also affixed by clamping screw 10 and main shaft 1, utilize bearing locking trimmer 8 to replace original nut check easily to cause bearing bias voltage, cause main shaft precision to reduce situation, main shaft 1 in use after a period of time, can, by the pretightning force of bearing locking trimmer 8 (regulating the elasticity of bearing locking trimmer 8 pairs of bearings) increase to bearing, make main shaft 1 accuracy guarantee in optimum state.As shown in Figure 1, along the circumferential direction offer the first groove 101 in the periphery of main shaft 1, the inwall of housing 4 along the circumferential direction offer the second groove 402, first groove 101 and the second groove 402 to offer position corresponding each other.The grinding length offered for reducing housing 4, main shaft 1 of the first groove 101 first groove 101 and the second groove 402, when assembling clutch shaft bearing 5 and the second bearing 7, it is easier to assemble each bearing is assembled to the other end during from main shaft 1 one end simultaneously.As shown in Figure 1, in the junction of above-mentioned housing 4 and end cap 3, in end cap 3, go back mounting O-shaped sealing ring 11, O RunddichtringO 11 improve housing 4 and the sealing property of end cap 3, prevent main shaft 1 inside from entering foreign matter or cooling fluid.
Main axle structure of the present invention is applied in numerically control grinder 3MK1410 workpiece spindle, through long-term test, numerically control grinder after improvement is beated by original precision 0.006mm and is reduced to≤0.004mm, main axle structure of the present invention is applied in numerically control grinder 3MK1310B workpiece spindle, through long-term test, precision after improvement reaches 0.003mm, after main axle structure of the present invention is applied to numerically control grinder 3MK1412, numerically control grinder main shaft stable accuracy is at below 0.002mm, apply the present invention to 3MZ1310 equally, in the working shaft of 3MK147 and 3MK145, through long-term test, its main shaft precision is all stabilized in 0.002-0.003.
More than describing is explanation of the invention, and be not the restriction to invention, limited range of the present invention is see claim, and when without prejudice to basic structure of the present invention, the present invention can do any type of amendment.
Claims (6)
1. the main axle structure for high precision machine tool, it is characterized in that: comprise one with the housing (4) of cavity, main shaft (1) runs through the inside cavity being arranged on described housing (4), in the cavity of described housing (4), in the periphery of described main shaft (1), also connect multiple clutch shaft bearing (5) and the second bearing (7) respectively, between the clutch shaft bearing (5) being positioned at inner side on main shaft (1) and the second bearing (7), be also socketed spacer ring (6) in the periphery of described main shaft (1); In the two ends of described housing (4) the affixed end cap of difference (3), in the step groove (301) at described end cap (3) inner ring place, sealing ring (2) is also installed, at least between the inner ring and the periphery of main shaft (1) of an end cap (3), bearing locking trimmer (8) is also installed, described bearing trimmer (8) by securing member and main shaft (1) affixed.
2. a kind of main axle structure for high precision machine tool as claimed in claim 1, it is characterized in that: described housing (4) is circular shell, along the circumferential direction evenly offer multiple threaded mounting hole (401) in the periphery of described housing (4), be spirally connected in described threaded mounting hole (401) for the hold-down nut (9) compressing spacer ring (6).
3. a kind of main axle structure for high precision machine tool as claimed in claim 1, it is characterized in that: along the circumferential direction offer the first groove (101) in the periphery of described main shaft (1), along the circumferential direction offer the second groove (402) at the inwall of described housing (4), described first groove (101) and the second groove (402) to offer position corresponding each other.
4. a kind of main axle structure for high precision machine tool as claimed in claim 1, it is characterized in that: described clutch shaft bearing (5) is angular contact ball bearing, described second bearing (7) is angular contact bearing, each clutch shaft bearing (5) abuts each other and is arranged on main shaft (1), and each second bearing (7) also abuts each other and is arranged on main shaft (1).
5. a kind of main axle structure for high precision machine tool as claimed in claim 1, is characterized in that: described sealing ring (2) is skeleton rubber seal.
6. a kind of main axle structure for high precision machine tool as claimed in claim 1, is characterized in that: in the junction of described housing (4) and end cap (3), in described end cap (3), go back mounting O-shaped sealing ring (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510519212.5A CN105149620A (en) | 2015-08-21 | 2015-08-21 | Main shaft structure for high-precision machine tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510519212.5A CN105149620A (en) | 2015-08-21 | 2015-08-21 | Main shaft structure for high-precision machine tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105149620A true CN105149620A (en) | 2015-12-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510519212.5A Pending CN105149620A (en) | 2015-08-21 | 2015-08-21 | Main shaft structure for high-precision machine tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105149620A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106392143A (en) * | 2016-12-12 | 2017-02-15 | 鲁东大学 | Clamping mechanism of mechanical main shaft for drilling and tapping center machine tool |
| CN113210641A (en) * | 2021-05-10 | 2021-08-06 | 上海第二工业大学 | Dynamic precision adjusting device for electric spindle of high-speed machine tool |
| CN114454091A (en) * | 2022-02-09 | 2022-05-10 | 广东创能精密机械有限公司 | Main shaft capable of adjusting bearing pretightening force electromagnetically |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4117750A (en) * | 1977-04-19 | 1978-10-03 | Fridrikh Lvovich Kopelev | Spindle assembly for a precision machine tool |
| JP2004268212A (en) * | 2003-03-10 | 2004-09-30 | Seiko Instruments Inc | Main spindle device |
| CN201969885U (en) * | 2010-12-10 | 2011-09-14 | 陈志长 | Novel main shaft component |
| CN203170987U (en) * | 2013-03-29 | 2013-09-04 | 西安北村精密机械有限公司 | Machine tool spindle combined with guide device |
| CN203679294U (en) * | 2013-08-29 | 2014-07-02 | 昆山允可精密工业技术有限公司 | Double-mandrel direct-connection precise rotating shaft |
| CN204094157U (en) * | 2014-08-06 | 2015-01-14 | 东莞市诚和数控机械制造有限公司 | A kind of main axle structure being applied to machining center |
| CN204381419U (en) * | 2014-12-26 | 2015-06-10 | 广州市昊志机电股份有限公司 | A kind of lathe spindle |
| CN204892986U (en) * | 2015-08-21 | 2015-12-23 | 无锡市三立轴承有限公司 | A main shaft structure for high precision machine tool |
-
2015
- 2015-08-21 CN CN201510519212.5A patent/CN105149620A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4117750A (en) * | 1977-04-19 | 1978-10-03 | Fridrikh Lvovich Kopelev | Spindle assembly for a precision machine tool |
| JP2004268212A (en) * | 2003-03-10 | 2004-09-30 | Seiko Instruments Inc | Main spindle device |
| CN201969885U (en) * | 2010-12-10 | 2011-09-14 | 陈志长 | Novel main shaft component |
| CN203170987U (en) * | 2013-03-29 | 2013-09-04 | 西安北村精密机械有限公司 | Machine tool spindle combined with guide device |
| CN203679294U (en) * | 2013-08-29 | 2014-07-02 | 昆山允可精密工业技术有限公司 | Double-mandrel direct-connection precise rotating shaft |
| CN204094157U (en) * | 2014-08-06 | 2015-01-14 | 东莞市诚和数控机械制造有限公司 | A kind of main axle structure being applied to machining center |
| CN204381419U (en) * | 2014-12-26 | 2015-06-10 | 广州市昊志机电股份有限公司 | A kind of lathe spindle |
| CN204892986U (en) * | 2015-08-21 | 2015-12-23 | 无锡市三立轴承有限公司 | A main shaft structure for high precision machine tool |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106392143A (en) * | 2016-12-12 | 2017-02-15 | 鲁东大学 | Clamping mechanism of mechanical main shaft for drilling and tapping center machine tool |
| CN106392143B (en) * | 2016-12-12 | 2019-05-17 | 鲁东大学 | A kind of brill attacks center machine tool mechanical main shaft clamping device |
| CN113210641A (en) * | 2021-05-10 | 2021-08-06 | 上海第二工业大学 | Dynamic precision adjusting device for electric spindle of high-speed machine tool |
| CN113210641B (en) * | 2021-05-10 | 2023-11-28 | 上海第二工业大学 | Dynamic precision adjusting device for electric spindle of high-speed machine tool |
| CN114454091A (en) * | 2022-02-09 | 2022-05-10 | 广东创能精密机械有限公司 | Main shaft capable of adjusting bearing pretightening force electromagnetically |
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Application publication date: 20151216 |