CN201033353Y - Numerical control heavy duty engine lathe head shaft fore bearing seat structure - Google Patents
Numerical control heavy duty engine lathe head shaft fore bearing seat structure Download PDFInfo
- Publication number
- CN201033353Y CN201033353Y CNU2007200706960U CN200720070696U CN201033353Y CN 201033353 Y CN201033353 Y CN 201033353Y CN U2007200706960 U CNU2007200706960 U CN U2007200706960U CN 200720070696 U CN200720070696 U CN 200720070696U CN 201033353 Y CN201033353 Y CN 201033353Y
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- China
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- bearing
- main shaft
- main spindle
- steel bushing
- bushing seat
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- Expired - Fee Related
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Abstract
The utility model relates to a front bearing seat structure for the main shaft of a numerical control heavy lathe, which comprises a main shaft, a main shaft box, a double-row cylindrical rolling bearing, and a plurality of planar roller bearings, the utility model is characterize in that: the structure also comprises a steel bush seat which is in the shape of a bowl and is arranged on the front end of the main shaft box, and the external circle of the steel bush seat is interference fitted with the inner hole of the main shaft box; the double-row cylindrical rolling bearing is arranged between the front support part of the main shaft and the steel bush seat, and two planar roller bearings are arranged on the two sides of the bowl bottom of the steel bush seat respectively. Compared with the prior art, the utility model has the advantages that because the steel bush seat is connected with inner hole of the main shaft box through the interference fit, the processing technology is improved, and the rigidity of the main shaft is increased and the precision of the main shaft is improved, therefore, the bearing capacity of the main shaft is good, the rigidity is good, the processing precision of the machine tool is high and the manufacturability is good.
Description
Technical field
The utility model relates to a kind of lathe spindle bearing block structure, especially a kind of CNC heavy turning machine main spindle front bearing holder structure.
Background technology
Heavy type numerical control lathe spindle fore bearing version does not all have bearing block at present, and its shortcoming is that the distance of fore bearing and plane bearing is excessive, and the main shaft front-extending quantity that the thermal expansion of main shaft causes is excessive, influences machining accuracy.Fore bearing is after radial clearance is adjusted, and the fore bearing front end face can not be fixed with the spindle shoulder rank, influences main axis stiffness.The plane bearing model selects to be subjected to the structural limitations can not be excessive, influences the axial pressure of main shaft.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of CNC heavy turning machine main spindle front bearing holder structure, and this bearing block structure can significantly improve base bearing loading capability and rigidity, machine finish and improve anufacturability.
For solving the problems of the technologies described above, technical solutions of the utility model are as follows:
A kind of CNC heavy turning machine main spindle front bearing holder structure comprises main shaft, main spindle box, biserial short cylindrical rolling bearing, the roller plane bearing is characterized in: this structure also comprises the steel bushing seat, the steel bushing seat is bowl shape, and is installed in the front end of main spindle box, its cylindrical and main spindle box endoporus interference fit; Biserial short cylindrical rolling bearing is installed between preceding supporting place of main shaft and the described steel bushing seat, and the bowl ends two side of steel bushing seat respectively is equipped with the roller plane bearing.
The front end of steel bushing seat is equipped with sealing flange; On the main shaft, be provided with dismountable adjustment ring at the biserial short cylindrical rolling bearing front end of being installed; On the main shaft, be provided with the fore bearing nut in the biserial short cylindrical rolling bearing rear end of being installed; On the main shaft, in the steel bushing seat, be provided with the plane bearing packing ring at the roller plane bearing front end of being installed; On the main shaft, outside the steel bushing seat, be provided with the plane bearing nut in the roller plane bearing rear end of being installed; Its cylindrical of steel bushing seat and main spindle box endoporus value of interference fit are 0.02-0.03mm.
The beneficial effect that the utility model is compared with prior art had is: the steel bushing seat is connected with the main spindle box endoporus by interference fit, improves processing technology, increases main axis stiffness and improves the main shaft precision.Therefore, the base bearing loading capability reaches good rigidity, machine finish height greatly, and anufacturability is good.
Description of drawings
Fig. 1 is a structure chart of the present utility model.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail.
As shown in Figure 1, a kind of CNC heavy turning machine main spindle front bearing holder structure comprises main shaft 1, main spindle box 6, biserial short cylindrical rolling bearing 5, roller plane bearing 9, steel bushing seat 4, sealing flange 3, dismountable adjustment ring 2, fore bearing nut 7, plane bearing packing ring 8, plane bearing nut 10.
Steel bushing seat 4 is bowl shape, and is installed in the front end of main spindle box 6, its cylindrical and main spindle box 6 endoporus interference fit; Biserial short cylindrical rolling bearing 5 is installed between preceding supporting place of main shaft 1 and the described steel bushing seat 4, and the bowl ends two side of steel bushing seat 4 respectively is equipped with roller plane bearing 9.
The front end of steel bushing seat 4 is equipped with sealing flange 3; On the main shaft 1, dismountable adjustment ring 2 is installed at biserial short cylindrical rolling bearing 5 front ends of being installed; Fore bearing nut 7 is installed in the rear end.
On the main shaft 1, in the steel bushing seat 4, the roller plane bearing 9 front end mounting plane bearing washers of being installed 8; Outside the steel bushing seat 4, roller plane bearing (9) the rear end mounting plane bearing nut of being installed 10;
Front-end bearing pedestal of the present utility model be designed to steel bushing seat 4, its structure is the deep hole flange-type.Internally, outer ring and all end faces all propose higher dimensional precision and morpheme error requirements.To adopt the magnitude of interference be 0.02 ~ 0.03 interference fit cooperating with main spindle box 6 endoporus.Forbid during assembling being pressed into, adopt the dry ice cooling, dwindle bearing block outer ring size and be loaded in main spindle box 6 endoporus.In 6 designs of steel bushing seat, also be provided with the locus that fore bearing nut 7 is adjusted usefulness, bearing oil passes in and out oily passage.
Fore bearing (biserial short cylindrical rolling bearing 5) is when being adjusted radially intermittently by fore bearing nut 7, bearing inner race is axially having mobilely, and its end face and distance between the main shaft 1 shoulder rank should equal to adjust encircles 2 thickness.As adjusting ring 2, to make full circle then very inconvenient, so be designed to semi-circularly, is beneficial to mounting or dismounting.When adjusting the forward spindle bearing once more later on, need the reconditioning adjustment to encircle at 2 o'clock, install and remove also very convenient.
The design of sealing flange 3, the wedge angle in the time of can making lubricating oil that fore bearing spilt when rotated by main axis rotation gets rid of oily effect and is collected in the cavity, flows into oil sump by the gravity effect from lower channel at last.
Plane bearing is selected roller for use, and journal bearing is selected biserial short cylindrical roller bearing for use, and endoporus is 1: 12 taper hole.Such combination makes main shaft have minimum footpath, intermittently axial, and has very high rigidity. Fore bearing nut 7 and 10 designs of plane bearing nut, internal thread is a high accuracy, and internal thread and front end face perpendicularity 0.002 guarantee bearing when being subjected to the nut active force, and precision does not descend.Fore bearing nut 7 and plane bearing nut 10 are equipped with self-locking grooves, utilize the effect of self-locking grooves, make fore bearing nut 7 and 10 firm being positioned on the main shaft 1 of plane bearing nut.
The dismounting design of fore bearing (biserial short cylindrical rolling bearing 5) is provided with asphalt channel at main shaft 1 front end.When oil circuit linked to each other with the high pressure oil gun, under action of hydraulic force, pressure oil passed on 1: 12 inner conical surface of bearing inner race, because inner conical surface is at the component that axially produces, and made the dismounting of fore bearing inner ring.
Claims (7)
1. CNC heavy turning machine main spindle front bearing holder structure, comprise main shaft (1), main spindle box (6), biserial short cylindrical rolling bearing (5), roller plane bearing (9) is characterized in that, this structure also comprises steel bushing seat (4), described steel bushing seat (4) is bowl shape, and is installed in the front end of main spindle box (6), its cylindrical and main spindle box (6) endoporus interference fit; Biserial short cylindrical rolling bearing (5) is installed between preceding supporting place of described main shaft (1) and the described steel bushing seat (4), and the bowl ends two side of steel bushing seat (4) respectively is equipped with roller plane bearing (9).
2. according to the described CNC heavy turning machine main spindle front bearing of claim 1 holder structure, it is characterized in that the front end of described steel bushing seat (4) is equipped with sealing flange (3).
3. according to the described CNC heavy turning machine main spindle front bearing of claim 1 holder structure, it is characterized in that, on the described main shaft (1), be provided with dismountable adjustment ring (2) at biserial short cylindrical rolling bearing (5) front end of being installed.
4. according to the described CNC heavy turning machine main spindle front bearing of claim 1 holder structure, it is characterized in that, on the described main shaft (1), be provided with fore bearing nut (7) in biserial short cylindrical rolling bearing (5) rear end of being installed.
5. according to the described CNC heavy turning machine main spindle front bearing of claim 1 holder structure, it is characterized in that, on the described main shaft (1), in the steel bushing seat (4), be provided with plane bearing packing ring (8) at roller plane bearing (9) front end of being installed.
6. according to the described CNC heavy turning machine main spindle front bearing of claim 1 holder structure, it is characterized in that, on the described main shaft (1), outside the steel bushing seat (4), be provided with plane bearing nut (10) in roller plane bearing (9) rear end of being installed.
7. according to the described CNC heavy turning machine main spindle front bearing of claim 1 holder structure, it is characterized in that its cylindrical of described steel bushing seat (4) and main spindle box (6) endoporus value of interference fit are 0.02-0.03mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200706960U CN201033353Y (en) | 2007-06-06 | 2007-06-06 | Numerical control heavy duty engine lathe head shaft fore bearing seat structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200706960U CN201033353Y (en) | 2007-06-06 | 2007-06-06 | Numerical control heavy duty engine lathe head shaft fore bearing seat structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201033353Y true CN201033353Y (en) | 2008-03-12 |
Family
ID=39194246
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200706960U Expired - Fee Related CN201033353Y (en) | 2007-06-06 | 2007-06-06 | Numerical control heavy duty engine lathe head shaft fore bearing seat structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201033353Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102049534A (en) * | 2010-11-05 | 2011-05-11 | 山东普利森集团有限公司 | Nut pre-tightening structure for mainshaft bearing of heavy duty lathe |
| CN102825268A (en) * | 2012-09-17 | 2012-12-19 | 长沙金岭机床有限责任公司 | Transmission main shaft structure of numerical control drilling and milling machine |
| CN105465194A (en) * | 2016-01-28 | 2016-04-06 | 泊头巨人重工机械有限公司 | Large precise double-row ball roller bearing adjustment structure and adjustment method thereof |
-
2007
- 2007-06-06 CN CNU2007200706960U patent/CN201033353Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102049534A (en) * | 2010-11-05 | 2011-05-11 | 山东普利森集团有限公司 | Nut pre-tightening structure for mainshaft bearing of heavy duty lathe |
| CN102049534B (en) * | 2010-11-05 | 2012-07-04 | 山东普利森集团有限公司 | Nut pre-tightening structure for mainshaft bearing of heavy duty lathe |
| CN102825268A (en) * | 2012-09-17 | 2012-12-19 | 长沙金岭机床有限责任公司 | Transmission main shaft structure of numerical control drilling and milling machine |
| CN105465194A (en) * | 2016-01-28 | 2016-04-06 | 泊头巨人重工机械有限公司 | Large precise double-row ball roller bearing adjustment structure and adjustment method thereof |
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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: 20080312 Termination date: 20160606 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |