CN201281082Y - Main shaft bearing of high speed high precision machine tool - Google Patents
Main shaft bearing of high speed high precision machine tool Download PDFInfo
- Publication number
- CN201281082Y CN201281082Y CNU2008201916706U CN200820191670U CN201281082Y CN 201281082 Y CN201281082 Y CN 201281082Y CN U2008201916706 U CNU2008201916706 U CN U2008201916706U CN 200820191670 U CN200820191670 U CN 200820191670U CN 201281082 Y CN201281082 Y CN 201281082Y
- Authority
- CN
- China
- Prior art keywords
- machine tool
- speed
- inner ring
- raceway
- precision
- 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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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
- F16C19/34—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load
- F16C19/38—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers
- F16C19/383—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone
- F16C19/385—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone with two rows, i.e. double-row tapered roller bearings
- F16C19/386—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone with two rows, i.e. double-row tapered roller bearings in O-arrangement
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- Rolling Contact Bearings (AREA)
Abstract
The utility model relates to a high-speed high-precision machine tool main shaft bearing used for a precision high-speed CNC (computer numerical control) machine tool main shaft. Raceways are arranged between a bearing outer race and bearing inner races, a rolling body is arranged in the window of a retainer and is embedded in the middle of the raceways, and a hole is arranged in the center of the inner race; the inner raceway of the outer race, the outer raceway of the inner race and the rolling body are all convex, a large rib of the inner race is designed into a circular arc type, the material of the retainer is high-rigidity engineering plastic, two inner races are provided, and lug bosses are arranged at the middle parts of outer diameters of the two inner races and are connected into one body by a clamp ring; and rubber sealing rings with grooves are arranged at the two end faces between the outer race and the inner races. By improving the material of the retainer, the inner raceway, the outer raceway, the rolling body, and the shape of the large rib of the inner race, utilizing three-convex technology to contact, and adopting cold-rolling technology, surface nitrogen-increasing processing technology and high-speed grinding technology, the machine tool main shaft bearing with precision class can adapt to the rotating speed of a machine tool and has the characteristics of high rigidity, long service life and low noise; by enhancing the precision of the bearing, the rotating precision of the machine tool main shaft can be enhanced and the surface quality of precision components as well as the quality of mould cutting faces can be improved.
Description
Affiliated technical field
The utility model relates in a kind of mechanical transmissioning technology field, especially for bearing accurate, the high-speed numeric control machine tool chief axis.
Background technique
Bearing is the complete sets of basic equipment spare of lathe, it is the foundation stone that the machine finish index guarantees, its performance directly has influence on rotating speed, rotating accuracy, rigidity, trembling vibration cutting ability, noise, temperature rise and the thermal distortion etc. of lathe, and then has influence on precision, the surface quality of processing accessories.In traditional mechanical or common mechanical, rotating speed mainly forwards several thousand rev/mins at hundreds of.Along with the fast development of Numeric Control Technology, " compound, at a high speed, intelligence, accurate, environmental protection " become the main trend of current machine tool industry technical development because, High-speed machining can improve effectively lathe work efficiency, shorten process-cycle of workpiece.Modern High-Speed working machine tool, spindle speed require to reach several ten thousand and forward tens0000 rev/mins to.This just requires machine tool chief axis and associated components thereof will adapt to the demand of High-speed machining, therefore also the design of bearing has been proposed brand-new requirement.If the high speed adaptability of bearing is bad, the temperature rise meeting of axis system is very serious, even can burn inefficacy to death.Therefore, high performance lathe must the high performance bearing of adapted.The precision of bearing can be divided into P0, P6, P5, P4 and five grades of P2, morpheme error such as the circular runout of main shaft bearing, end face run-out, rolling element diameter are inconsistent can have a strong impact on the precision of axis system and workpiece thereof, be used for bearing accuracy on the modern machine main shaft should be P5 and more than, and for numerical control machine tool, machining center etc. at a high speed, the main shaft bearing of high-accuracy lathe, then need select P4 and higher level high-precision bearing thereof for use.Because modern machine main shaft bearing highi degree of accuracy, at a high speed, high reliability request, rolling element, retainer and inner and outer ring are all had some specific (special) requirements, and traditional bearing and processing technology thereof can not satisfy the requirement of modern machine to the high speed of main bearing bearing, high-precision, high reliability.
Summary of the invention
For overcoming the deficiencies in the prior art, goal of the invention of the present utility model is to provide a kind of high-speed, high precision machine tool mainshaft bearing, contact with inside and outside circle convex surface by rolling element, and change methods such as inner ring shelves limit shape, retainer material to realize high speed, the high precision int of bearing, the purpose of the main shaft rotation precision of raising lathe and the quality of precise part surface and die cuts bevel.
The technical solution of the utility model is: between outer ring and the inner ring raceway is arranged, rolling element is contained in the window of retainer, and in the middle of the raceway between embedding outer ring and the inner ring, the center of inner ring is porose, be used for linking to each other with machine tool chief axis, the transmission of realizable force is characterized in that: the interior raceway of outer ring, the outer raceway of inner ring and rolling element all have convexity, the big shelves of inner ring limit is designed to circular arc type, realizes contacting for putting between rolling element and outer ring, the inner ring.
The material of said retainer of the present utility model is high rigidity engineering plastics.
Inner ring of the present utility model is for being two, and the middle part of external diameter has boss, is connected as one by snap ring.
The both ends of the surface of the utility model between outer ring and inner ring are equipped with the rubber seal of band groove.
The utility model changes the material of retainer into high rigidity engineering plastics, the big shelves of inner ring limit improved shape is a circular arc type, contact between the interior raceway of outer ring, the outer raceway of inner ring and the rolling element is changed into a contact by line contact, to reach the main shaft rotation precision that improves lathe and the purpose of precise part surface and die cuts bevel quality.
The utility model is compared with traditional bearing, has the following advantages:
1, highi degree of accuracy: grade of accuracy reaches the P4 level;
2, high rotating speed: change more than the scooter 4200rpm;
3, the long lifetime: the life-span is more than 3 times of traditional bearing, is more than ten times of projected life;
4, resistance is little: rub-moment is 0.01-0.02Nm only, and the heat that produces during work is less, greatly reduces the stress of material and oiling agent in the traditional bearing.
5, thermal expansion coefficient is little: the temperature variant dimensional changes amount of high rigidity engineering plastics is little, and the hot preload that produces is lower, thereby has avoided too much heat accumulation to cause roller and raceway fatigue flake to lose efficacy.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further described.
Fig. 1 is a structural representation of the present utility model;
To be the inside and outside circle of Fig. 1 contact partial enlarged drawing with convexity between the rolling element to Fig. 2.
Embodiment
As shown in Figure 1, on the external diameter of the internal diameter of outer ring 2 of the present utility model and inner ring 4, be the raceway that has convexity with rolling element 6 contact position, rolling element 6 has convexity, the big shelves limit of inner ring 4 is designed to circular arc type, and like this, the contact between the interior raceway of outer ring 2, the outer raceway of inner ring 4 and the rolling element 6 is changed into a contact by the line contact, not only can reduce friction, increase flexibility, and can improve life of product; Torque is transmitted through the raceway of the raceway of inner ring 4, rolling element 6, outer ring 2; Inner ring 4 is two, the middle part of external diameter has boss, connected as one by snap ring 1, two inner ring internal diameter size mutual deviations must not be greater than 0.004mm, and outer ring 2, inner ring 4 usefulness Bearing Steels are made, through cold rolling forge, behind modified, thick, the finish turning, carry out surperficial nitrogen pick-up and handle, be shaped through isothermal tempering, corase grind, correct grinding, superfine milling, inside and outside raceway face roughness can reach 0.022～0.05 μ m, after above-mentioned special process is handled, can effectively strengthen inside and outside circle precision and intensity; Rolling element 6 is contained in the window of retainer 3, and rolling element 6 is two row, also can be single-row or 3 row, and in the middle of the raceway between embedding outer ring 2 and the inner ring 4; The center of inner ring 4 is porose, is used for linking to each other with axle the transmission of realizable force; Both ends of the surface between outer ring 2 and inner ring 4 are equipped with rubber seal 5, for having the structure of groove, add this seal ring and can stop that lubricating grease leaks from the bearing both sides, can stop the both sides intrusion of dirt from bearing again.
The material of retainer 3 is high rigidity engineering plastics, makes that 3 pairs of grease degradation influences of retainer are little, it is more abundant to lubricate, heat resistance is better.So, not only dimensional accuracy is improved, and the distortion that centrifugal force causes when rotating also reduced, and retainer 3 has also reduced half with the guide clearance of outer ring 2.
As shown in Figure 2,2 is the outer ring, 4 is inner ring, 6 is rolling element, on the external diameter of the internal diameter of outer ring 2 and inner ring 4, is the raceway that has convexity with rolling element 6 contact position, rolling element 6 also has convexity, between be cambered surface contact, the big shelves limit of inner ring 4 is designed to circular arc type, changes into a contact by the line contact.
Claims (6)
1, a kind of high-speed, high precision machine tool mainshaft bearing, between outer ring (2) and the inner ring (4) raceway is arranged, rolling element (6) is contained in the window of retainer (3), and in the middle of the raceway between embedding outer ring (2) and the inner ring (4), the center of inner ring (4) is porose, is used for linking to each other with machine tool chief axis the transmission of realizable force, it is characterized in that: the outer raceway and the rolling element (6) of the interior raceway of outer ring (2), inner ring (4) all have convexity, realize contacting for putting between rolling element (6) and outer ring (2), the inner ring (4).
2, high-speed, high precision machine tool mainshaft bearing according to claim 1 is characterized in that: the big shelves of inner ring (4) limit is designed to circular arc type, realizes that the large end face of rolling element (6) contacts for point with inner ring (4).
3, high-speed, high precision machine tool mainshaft bearing according to claim 1 is characterized in that: the material of retainer (3) is high rigidity engineering plastics.
4, high-speed, high precision machine tool mainshaft bearing according to claim 1 is characterized in that: inner ring (4) is two, and the middle part of external diameter has boss, is connected as one by snap ring (1).
5, high-speed, high precision machine tool mainshaft bearing according to claim 1 is characterized in that: the both ends of the surface between outer ring (2) and inner ring (4) are equipped with rubber seal (5).
6, high-speed, high precision machine tool mainshaft bearing according to claim 5 is characterized in that: rubber seal (5) is for having the sealing configuration of groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201916706U CN201281082Y (en) | 2008-10-23 | 2008-10-23 | Main shaft bearing of high speed high precision machine tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201916706U CN201281082Y (en) | 2008-10-23 | 2008-10-23 | Main shaft bearing of high speed high precision machine tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201281082Y true CN201281082Y (en) | 2009-07-29 |
Family
ID=40927957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201916706U Expired - Fee Related CN201281082Y (en) | 2008-10-23 | 2008-10-23 | Main shaft bearing of high speed high precision machine tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201281082Y (en) |
-
2008
- 2008-10-23 CN CNU2008201916706U patent/CN201281082Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: HUBEI NEW TORCH TECHNOLOGY CO., LTD. Free format text: FORMER NAME: HUBEI NEW TORCH SCIENCE + TECHNOLOGY CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 441004 automobile industry park, hi tech Industrial Development Zone, Hubei, Xiangfan Patentee after: The new torch Science and Technology Ltd. in Hubei Address before: 441004 automobile industry park, hi tech Industrial Development Zone, Hubei, Xiangfan Patentee before: Hubei New Torch Science & Technology Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090729 Termination date: 20161023 |