CN2578046Y - Four tile style hydrodynamic bearing spindle structure - Google Patents
Four tile style hydrodynamic bearing spindle structure Download PDFInfo
- Publication number
- CN2578046Y CN2578046Y CN 02257981 CN02257981U CN2578046Y CN 2578046 Y CN2578046 Y CN 2578046Y CN 02257981 CN02257981 CN 02257981 CN 02257981 U CN02257981 U CN 02257981U CN 2578046 Y CN2578046 Y CN 2578046Y
- Authority
- CN
- China
- Prior art keywords
- main shaft
- grinding
- frame
- screw
- utility
- 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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- Crushing And Grinding (AREA)
Abstract
The utility model belongs to a main part of a centerless grinding machine. The utility model is used for supporting a grinding wheel, and causing a main shaft of a grinding wheel to keep in high rotation precision in the process of grinding, and has the main technical proposal that the utility model comprises a grinding frame and a main shaft arranged on the grinding frame. The utility model is characterized in that the combined part of both ends of the main shaft and the grinding frame is provided with four bearing liners along the circumferential direction of the main shaft; the grinding frame is provided with threaded holes. After screws are screwed in the threaded holes, the spherical end parts of the screws are matched with the concave spherical faces on the bearing liners. The screws are provided with at least two bolt holes. After the bolts penetrate through the through holes on screw covers, the bolts are connected with the bolt holes in a matched way, and the end faces of the screw covers are larger than that of the screws. The utility model can improve the dynamic stiffness and the rotation precision of the main shaft of a grinding wheel of the centerless grinding machine at the time of work, and cause the main shaft of a grinding wheel to be conveniently adjusted.
Description
Technical field
The utility model belongs to a critical piece of centerless grinder, in order to the supporting emery wheel, and makes grinding wheel spindle keep higher rotating accuracy in grinding process.
Background technology
In the hydrodynamic bearing main axle structure of centerless grinder, three slices watts of formulas are arranged with five slices watts of formulas, promptly support by sphere screw with three or five bearing shells, bearing shell can not only be transposed in the Plane of rotation of axle, and can in axial plane, transpose.In the prior art, three slices watts of formula hydrodynamic bearings exist bearing capacity and the relatively poor problem of rigidity, and then there is complex structure in five chip hydrodynamic bearings and adjusts inconvenient shortcoming.
Summary of the invention
The purpose of this utility model is four slices watts of formula hydrodynamic bearings of a kind of centerless grinder of design main axle structure, with the dynamic stiffness and the rotating accuracy of raising centerless grinder grinding wheel spindle when working, and makes it easy to adjust.
Its main technical schemes comprises the mill frame and is installed on the main shaft that grinds on the frame, it is characterized in that being provided with along 4 bearing shells of the circumferential arrangement of main shaft with the joint portion of grinding frame at the two ends of main shaft.
Screwed hole is set at mill on the frame, after screw was screwed into screwed hole, its ball-shaped end cooperated with spill sphere on the bearing shell; At least two bolts hole are set on screw, and bolt is connected with bolt hole after passing through hole on the screw cover, and the end face of screw cover is greater than the end face of screw.
Position corresponding to screwed hole on the mill frame is provided with pit, and screw cover is positioned at pit, at the end face and the step place of grinding frame of screw cover sealing ring is set; The middle part of main shaft is provided with the axial thrust ring with the joint portion of mill frame, and this thrust ring is positioned at the both sides of the step on the main shaft.
On the circumference of grinding wheel spindle, evenly arrange four bearing shells, each bearing shell is used the self-aligning spherical support of supporting screw respectively, the sphere of supporting screw and the sphere of bearing shell grind mutually, and be good to guarantee contact, and make bearing shell can swing in these are bearing in the main axis rotation plane, transpose.Main shaft oil is housed in the sleeve of main shaft, when main shaft rotates at a high speed, between rotary main shaft and bearing shell, forms oil film wedge, produce dynamic pressure effect.Bearing shell is not when transposing, and its sliding surface cross section is the circular arc concentric with the alignment of shafts.When main axis rotation, bearing shell is adjusted the structural parameters of oil film wedge, the oil film pressure of formation and external applied load balance, and the supporting-point of making a concerted effort to pass through of oil film pressure just around the supporting swing.Because the supporting of positioning can only swing aside not in the centre of bearing shell, forms unidirectional oil film wedge, so be specially adapted to the grinding wheel spindle of centerless grinder.
In addition, it is simple that the utility model also has processing technology, long service life, and characteristics such as maintenance cost is low, it is more simple for structure than five slices watts of formula hydrodynamic bearings again than three slices watts of formula hydrodynamic bearing good rigidlies, and easily adjusts.
Description of drawings
Fig. 1 is the structure chart of utility model.
Fig. 2 is the enlarged drawing of B among Fig. 1.
Fig. 3 is the A-A view of Fig. 1.
The specific embodiment
As shown in the figure: grinding wheel spindle 2 is installed on the mill frame 1, its left end dress emery wheel, the right-hand member wheel that thongs, the rotary power of grinding wheel spindle 2 by grinding wheel drive mitor by the belt transmission.Middle part at main shaft 2 is provided with axial thrust ring 3 with the joint portion of grinding frame 1, and this thrust ring 3 is positioned at the both sides of the step 14 on the main shaft 2.Axial thrust ring 3 is used for controlling the axial float of grinding wheel spindle 2 at turning course.
As shown in Figure 3: four bearing shells 6 have been formed the supporting of grinding wheel spindle 2.This version can be eliminated to greatest extent because main shaft axle journal not round (majority is oval) to the influence that rotating accuracy produces, has guaranteed the grinding accuracy of centerless grinder.
As shown in Figure 2: screwed hole 10 is set at mill on the frame 1, after screw 5 was screwed into screwed hole 10, its ball-shaped end 9 cooperated with spill sphere on the bearing shell 6.Every bearing shell 6 all has sphere screw 5 supportings, for sphere contacts, is beneficial to the adjustment of bearing shell 6 angle when working between screw 5 and the bearing shell 6.Two bolts hole 11 are set on screw 5, and bolt 4 is connected with bolt hole 11 after passing through hole 12 on the screw cover 8, and the end face of screw cover 8 is greater than the end face of screw 5.Each sphere screw 5 all uses two clamping screws 4 locked, avoids screw 5 loosening, thereby the dwell lock between bearing shell 6 and the grinding wheel spindle 2 is fixed between 0.015～0.025mm of regulation.
Position corresponding to screwed hole 10 on mill frame 1 is provided with pit 13, and screw cover 8 is positioned at pit 13, at the end face and the step place of grinding frame 1 of screw cover 8 sealing ring 7 is set.Screw cover 8 compresses O RunddichtringO 7 in the process of locking sphere screw 5, solved mill frame 1 in the course of the work, the problem of supporting spherical screw 5 place's oil impregnates of bearing shell 6.
Claims (5)
1, four slices watts of formula hydrodynamic bearings of centerless grinder main axle structure comprises mill frame (1) and is installed on the main shaft (2) that grinds on the frame (1), it is characterized in that being provided with along 4 bearing shells (6) of the circumferential arrangement of main shaft (2) with the joint portion of grinding frame (1) at the two ends of main shaft (2).
2, structure according to claim 1 is characterized in that on mill frame (1) screwed hole (10) being set, and after screw (5) was screwed into screwed hole (10), its ball-shaped end (9) cooperated with spill sphere on the bearing shell (6).
3, structure according to claim 1, it is characterized in that going up setting at least two bolts hole (11) at screw (5), bolt (4) is connected with bolt hole (11) after passing through hole (12) on the screw cover (8), and the end face of screw cover (8) is greater than the end face of screw (5).
4, according to claim 1 or 2 or 3 described structures, it is characterized in that pit (13) being set at the position that mill frame (1) is gone up corresponding to screwed hole (10), screw cover (8) is positioned at pit (13), at the end face and the step place of grinding frame (1) of screw cover (8) sealing ring (7) is set.
5, structure according to claim 1 is characterized in that the middle part of main shaft (2) and the joint portion of grinding frame (1) are provided with axial thrust ring (3), and this thrust ring (3) is positioned at the both sides of the step (14) on the main shaft (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02257981 CN2578046Y (en) | 2002-10-22 | 2002-10-22 | Four tile style hydrodynamic bearing spindle structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02257981 CN2578046Y (en) | 2002-10-22 | 2002-10-22 | Four tile style hydrodynamic bearing spindle structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2578046Y true CN2578046Y (en) | 2003-10-08 |
Family
ID=33725828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02257981 Expired - Fee Related CN2578046Y (en) | 2002-10-22 | 2002-10-22 | Four tile style hydrodynamic bearing spindle structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2578046Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102554772A (en) * | 2010-12-30 | 2012-07-11 | 大连冶金轴承股份有限公司 | Grinding wheel and main shaft assembly of spherical roller grinder |
| CN102785137A (en) * | 2012-08-20 | 2012-11-21 | 无锡键禾数控机床有限公司 | Grinding wheel spindle structure for valve stem numerical-control centerless grinder |
| CN104100637A (en) * | 2014-07-25 | 2014-10-15 | 温州华聚科技有限公司 | Protective mechanism for hybrid bearing matched with machine tool main shaft and machine tool |
-
2002
- 2002-10-22 CN CN 02257981 patent/CN2578046Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102554772A (en) * | 2010-12-30 | 2012-07-11 | 大连冶金轴承股份有限公司 | Grinding wheel and main shaft assembly of spherical roller grinder |
| CN102785137A (en) * | 2012-08-20 | 2012-11-21 | 无锡键禾数控机床有限公司 | Grinding wheel spindle structure for valve stem numerical-control centerless grinder |
| CN104100637A (en) * | 2014-07-25 | 2014-10-15 | 温州华聚科技有限公司 | Protective mechanism for hybrid bearing matched with machine tool main shaft and machine tool |
| CN104100637B (en) * | 2014-07-25 | 2016-05-11 | 温州华聚科技有限公司 | Protection mechanism and lathe with the supporting dynamic and hydrostatic bearing of machine tool chief axis |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |