CN204396903U - Live centre - Google Patents
Live centre Download PDFInfo
- Publication number
- CN204396903U CN204396903U CN201520062194.8U CN201520062194U CN204396903U CN 204396903 U CN204396903 U CN 204396903U CN 201520062194 U CN201520062194 U CN 201520062194U CN 204396903 U CN204396903 U CN 204396903U
- Authority
- CN
- China
- Prior art keywords
- mandrel
- bearing
- sleeve
- drive end
- taper surface
- 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
Links
Landscapes
- Mounting Of Bearings Or Others (AREA)
Abstract
The utility model provides a kind of live centre, belongs to field of mechanical technique.It solving existing top locating effect is not very Ideal Problem.This live centre, the mandrel comprising sleeve and be axially located in sleeve, the outer end of mandrel has cone centre, cone centre stretches out in the outer face of sleeve, the outer end madial wall of sleeve is taper surface one, the outer end of sleeve is threaded the drive end bearing bracket passed for mandrel, the inner of drive end bearing bracket is equipped with some elasticity convex bodys, the lateral wall of the correspondence of elasticity convex body forms taper surface two, taper surface two abuts on taper surface one, the inner of drive end bearing bracket is also provided with base bearing and base bearing is positioned at the inner side of elasticity convex body, the inner ring of base bearing is positioned on mandrel, its outer ring is resisted against the madial wall of described drive end bearing bracket.This live centre has the advantage ideal to the locating effect of mandrel.
Description
Technical field
The utility model belongs to field of mechanical technique, relates to a kind of top, particularly a kind of live centre.
Background technology
Live centre is widely used in various lathe, the Digit Control Machine Tool that especially foot is now fast-developing.Existing Digit Control Machine Tool have rotating speed fast, bear the large feature of load, this just proposes same requirement to the annex of circle turn this piece-holder top.
Long-term with rice, it is all be arranged on tailstock tool that the revolution top of most of lathe is lost, and generally includes sleeve, mandrel, mandrel is positioned at base bearing in sleeve and intermediate bearing.Wherein, intermediate bearing is located by the step that sleeve and mandrel are arranged, and base bearing is by step that mandrel is arranged and located by the drive end bearing bracket of thread seal at sleeve ends, makes mandrel can rotate in sleeve thus, realizes revolution.Because the spacing between two bearings is shorter, mandrel stretches out the top formation cantilever beam structure of sleeve part, when adding a large-scale workpiece, bearing larger load, larger axial force is very easy to inclined for this minor axis top, thus accelerate the wearing and tearing of bearing, make the radial run-out that top generation is larger, reduce the machining accuracy of lathe.
Top (the application number: 201320848912.5) of a kind of precision rotating disclosed in Chinese patent literature, it comprises housing, top mandrel is provided with in housing, the front end of top mandrel is provided with top, the front end of housing is provided with front round concave shape step, thrust ball bearing is provided with bottom round concave shape step, thrust ball bearing front end is provided with angular contact bearing, drive end bearing bracket is provided with by angular contact bearing front end, the rear end of housing is provided with rear round concave shape step, be provided with deep groove ball bearing bottom rear round concave shape step, the front end of deep groove ball bearing is provided with rear drive end bearing bracket.But being connected with housing by drive end bearing bracket is axially positioned in housing by angular contact bearing, not therefore very desirable to top locating effect.
Summary of the invention
The purpose of this utility model there are the problems referred to above for existing technology, proposes a kind of live centre ideal to the locating effect of mandrel.
The purpose of this utility model realizes by following technical proposal: live centre, the mandrel comprising sleeve and be axially located in described sleeve, the outer end of described mandrel has cone centre and described cone centre stretches out in the outer face of described sleeve, it is characterized in that, the outer end madial wall of described sleeve is taper surface one, the outer end of described sleeve is threaded the drive end bearing bracket passed for mandrel, the inner of described drive end bearing bracket is equipped with some elasticity convex bodys, the lateral wall of the correspondence of described elasticity convex body forms taper surface two and described taper surface two abuts on described taper surface one, the inner of described drive end bearing bracket is also provided with base bearing and described base bearing is positioned at the inner side of described elasticity convex body, the inner ring of described base bearing is positioned on described mandrel, its outer ring is resisted against the madial wall of described drive end bearing bracket.
When connecting, by being threaded of drive end bearing bracket and sleeve, taper surface two is made to abut on taper surface one, by the outer ring of the deformation extruding base bearing of elasticity convex body, mandrel is made to be axially positioned in sleeve, when mandrel is located, there is good axiality, be connected with the screw thread of sleeve by drive end bearing bracket, there is dismounting conveniently advantage.
In above-mentioned live centre, be provided with intermediate bearing between described mandrel and described sleeve and described intermediate bearing is positioned at the inner side of described base bearing.By arranging intermediate bearing, to mandrel, there is good supporting role, making the rotation of mandrel have good locating effect.
In above-mentioned live centre, the lateral wall of described sleeve be provided with oil filler point and described oil filler point between described intermediate bearing and described base bearing.By arranging oil filler point, being convenient to lubricate the intermediate bearing in sleeve and base bearing, making the advantage that its life-span is longer.
In above-mentioned live centre, be provided with convex shoulder in the cavity of the inner of described drive end bearing bracket, the end face of described base bearing is resisted against on described convex shoulder.
In above-mentioned live centre, between described drive end bearing bracket and described mandrel, be provided with sealing ring.Be provided with sealing ring between lid and described mandrel, there is good sealing effectiveness.
In above-mentioned live centre, between the other end of described sleeve and the other end of described mandrel, be provided with tail bearing.By arranging tail bearing, to the tail end of mandrel, there is good locating effect.
In above-mentioned live centre, described base bearing is needle bearing or roller bearing.
Compared with prior art, this live centre has the following advantages:
Being threaded 1, by drive end bearing bracket and sleeve, makes taper surface two abut on taper surface one, by the outer ring of the deformation extruding base bearing of elasticity convex body, makes mandrel be axially positioned in sleeve, has good axiality when mandrel is located;
2, be connected with the screw thread of sleeve by drive end bearing bracket, there is dismounting conveniently advantage;
3, by arranging intermediate bearing, to mandrel, there is good supporting role, making the rotation of mandrel have good locating effect.
Accompanying drawing explanation
Fig. 1 be this live centre partly cut open schematic diagram.
Fig. 2 is the schematic perspective view of the drive end bearing bracket of this live centre.
In figure, 1, sleeve; 1a, taper surface one; 2, mandrel; 3, cone centre; 4, drive end bearing bracket; 4a, elasticity convex body; 4b, taper surface two; 4c, convex shoulder; 5, base bearing; 6, intermediate bearing; 7, oil filler point; 8, sealing ring.
Detailed description of the invention
Be below specific embodiment of the utility model and by reference to the accompanying drawings, the technical solution of the utility model is further described, but the utility model be not limited to these embodiments.
As illustrated in fig. 1 and 2, live centre, the mandrel 2 comprising sleeve 1 and be axially located in sleeve 1, the outer end of mandrel 2 has cone centre 3, cone centre 3 stretches out in the outer face of sleeve 1, the outer end madial wall of sleeve 1 is taper surface one 1a, the outer end of sleeve 1 is threaded the drive end bearing bracket 4 passed for mandrel 2, the inner of drive end bearing bracket 4 is equipped with some elasticity convex body 4a, the lateral wall of the correspondence of elasticity convex body 4a forms taper surface two 4b, taper surface two 4b abuts on taper surface one 1a, the inner of drive end bearing bracket 4 is also provided with base bearing 5, for needle bearing or roller bearing.Base bearing 5 is positioned at the inner side of elasticity convex body 4a, and the inner ring of base bearing 5 is positioned on mandrel 2, and its outer ring is resisted against the madial wall of drive end bearing bracket 4, is provided with convex shoulder 4c in the cavity of the inner of drive end bearing bracket 4, and the end face of base bearing 5 is resisted against on convex shoulder 4c.
Be provided with intermediate bearing 6 between mandrel 2 and described sleeve 1, intermediate bearing 6 is positioned at the inner side of described base bearing 5.By arranging intermediate bearing 6, to mandrel 2, there is good supporting role, making the rotation of mandrel 2 have good locating effect.
The lateral wall of sleeve 1 is provided with oil filler point 7, and oil filler point 7 is between intermediate bearing 6 and base bearing 5, and oil filler point 7 is provided with oil nozzle, is convenient to lubricate the intermediate bearing 6 in sleeve 1 and base bearing 5, makes the advantage that its life-span is longer.Sealing ring 8 is provided with between end cap and described mandrel 2.Tail bearing is provided with between the other end of sleeve 1 and the other end of described mandrel 2.
When connecting, by being threaded of drive end bearing bracket 4 and sleeve 1, taper surface two 4b is made to abut on taper surface one 1a, by the outer ring of the deformation extruding base bearing 5 of elasticity convex body 4a, mandrel 2 is made to be axially positioned in sleeve 1, when mandrel 2 is located, there is good axiality, be connected by the screw thread of drive end bearing bracket 4 with sleeve 1, there is dismounting conveniently advantage.
Specific embodiment described herein is only to the explanation for example of the utility model spirit.The utility model person of ordinary skill in the field can make various amendment or supplements or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present utility model or surmount the scope that appended claims defines.
Although more employ the term such as sleeve 1, taper surface one 1a, mandrel 2, cone centre 3, drive end bearing bracket 4, elasticity convex body 4a, taper surface two 4b, convex shoulder 4c, base bearing 5, intermediate bearing 6, oil filler point 7, sealing ring 8 herein, do not get rid of the possibility using other term.These terms are used to be only used to describe and explain essence of the present utility model more easily; The restriction that they are construed to any one additional is all contrary with the utility model spirit.
Claims (7)
1. live centre, the mandrel (2) comprising sleeve (1) and be axially located in described sleeve (1), the outer end of described mandrel (2) has cone centre (3) and described cone centre (3) stretches out in the outer face of described sleeve (1), it is characterized in that, the outer end madial wall of described sleeve (1) is taper surface one (1a), the outer end of described sleeve (1) is threaded the drive end bearing bracket (4) passed for mandrel (2), the inner of described drive end bearing bracket (4) is equipped with some elasticity convex bodys (4a), the lateral wall of the correspondence of described elasticity convex body (4a) forms taper surface two (4b) and described taper surface two (4b) abuts on described taper surface one (1a), the inner of described drive end bearing bracket (4) is also provided with base bearing (5) and described base bearing (5) is positioned at the inner side of described elasticity convex body (4a), the inner ring of described base bearing (5) is positioned on described mandrel (2), its outer ring is resisted against the madial wall of described drive end bearing bracket (4).
2. live centre according to claim 1, it is characterized in that, be provided with intermediate bearing (6) between described mandrel (2) and described sleeve (1) and described intermediate bearing (6) is positioned at the inner side of described base bearing (5).
3. live centre according to claim 2, it is characterized in that, the lateral wall of described sleeve (1) is provided with oil filler point (7) and described oil filler point (7) is positioned between described intermediate bearing (6) and described base bearing (5).
4. the live centre according to claim 1 or 2 or 3, it is characterized in that, be provided with convex shoulder (4c) in the cavity of the inner of described drive end bearing bracket (4), the end face of described base bearing (5) is resisted against on described convex shoulder (4c).
5. the live centre according to claim 1 or 2 or 3, is characterized in that, is provided with sealing ring (8) between described drive end bearing bracket (4) and described mandrel (2).
6. the live centre according to claim 1 or 2 or 3, is characterized in that, is provided with tail bearing between the other end of described sleeve (1) and the other end of described mandrel (2).
7. the live centre according to claim 1 or 2 or 3, is characterized in that, described base bearing (5) is needle bearing or roller bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520062194.8U CN204396903U (en) | 2015-01-29 | 2015-01-29 | Live centre |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520062194.8U CN204396903U (en) | 2015-01-29 | 2015-01-29 | Live centre |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204396903U true CN204396903U (en) | 2015-06-17 |
Family
ID=53420801
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520062194.8U Expired - Fee Related CN204396903U (en) | 2015-01-29 | 2015-01-29 | Live centre |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204396903U (en) |
-
2015
- 2015-01-29 CN CN201520062194.8U patent/CN204396903U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103375494A (en) | Y shaft bearing pedestal of leading screw engraving machine | |
| CN104047960B (en) | Automobile-used bearing outer ring forging | |
| CN204396906U (en) | A kind of double-purpose is top | |
| CN204396903U (en) | Live centre | |
| CN103603932B (en) | One disappears gap diameter reducing type ripple tooth retarder in real time | |
| CN201446241U (en) | Built-in tailstock | |
| CN201779140U (en) | Elliptical static pressure sliding bearing | |
| CN202779838U (en) | Live center for turning of large long-axis type parts | |
| CN205309319U (en) | Activity live centre | |
| CN205533784U (en) | High -speed biserial tapered roller revolving stage bearing | |
| CN203390216U (en) | Aluminum ingot lathe tail frame | |
| CN2928320Y (en) | High speed heavy load rotary center | |
| CN208613773U (en) | Rolling center for hobboing cutter teeth | |
| CN107725531B (en) | Combinational gap formula multistage dumper hydraulic cylinder | |
| CN203770399U (en) | Angular contact bearing outer ring structure of electric spindle | |
| CN205668078U (en) | A kind of boring bar bearing guiding device for deep hole machining | |
| CN105312943A (en) | Net-shaped taper sleeve self-compensating centrifugal expansion high-speed cutter handle | |
| CN204819140U (en) | Planogrinder main shaft bearing structure | |
| CN204396904U (en) | Double-purpose is top | |
| CN204533249U (en) | Internal connecting type rotating shaft | |
| CN203770407U (en) | Angular contact bearing of electric spindle | |
| CN204419853U (en) | Novel angular contact articulated bearing | |
| CN205244129U (en) | Roller bearing | |
| CN217401446U (en) | Outer ring of double-row closed deep groove ball bearing | |
| CN205309320U (en) | Wear -resisting live centre |
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: 20150617 Termination date: 20160129 |
|
| EXPY | Termination of patent right or utility model |