CN1003090B - Pretightening force cotroller of rolling bearing - Google Patents
Pretightening force cotroller of rolling bearing Download PDFInfo
- Publication number
- CN1003090B CN1003090B CN87105486A CN87105486A CN1003090B CN 1003090 B CN1003090 B CN 1003090B CN 87105486 A CN87105486 A CN 87105486A CN 87105486 A CN87105486 A CN 87105486A CN 1003090 B CN1003090 B CN 1003090B
- Authority
- CN
- China
- Prior art keywords
- bearing
- annulus
- pretightening force
- straight pin
- internal diameter
- 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
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Classifications
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- 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
- F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
- F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
- F16C19/16—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls
- F16C19/163—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls with angular contact
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- 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
- F16C19/54—Systems consisting of a plurality of bearings with rolling friction
- F16C19/541—Systems consisting of juxtaposed rolling bearings including at least one angular contact bearing
- F16C19/542—Systems consisting of juxtaposed rolling bearings including at least one angular contact bearing with two rolling bearings with angular contact
- F16C19/543—Systems consisting of juxtaposed rolling bearings including at least one angular contact bearing with two rolling bearings with angular contact in O-arrangement
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- 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
- F16C2229/00—Setting preload
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- 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
- F16C25/00—Bearings for exclusively rotary movement adjustable for wear or play
- F16C25/06—Ball or roller bearings
- F16C25/08—Ball or roller bearings self-adjusting
Abstract
When a precise mainshaft system works, the pretightening force of a bearing is controlled to a specific optimum value according to different rotary speeds and loads to reduce heat generation of the system as much as possible. The present invention has good rigidity and strong vibration resistance. The present invention has the technical scheme that micro displacement is generated from the outer ring of the bearing by pressure change in a hollow circular ring member, and thus, the pretightening force of the bearing is controlled. The present invention has the advantages of reliable control, simple structure, strong versatility and convenient installation in the existing bearing systems.
Description
The invention belongs to rolling bearing pretightening power control technique.
For the bigger accurate main shaft of speed range, its bearing pre-fastening must be controlled.For example, the main shaft of computer numerical control machining center, when milling casing plane, rotating speed is very low, and cutting force is very big, in order to improve machining accuracy, guarantees that axis system has favorable rigidity, to bear big cutting force, requires the pretightening force of bearing also very big; And the screw hole on the drilling casing, or during pin-and-hole, in order to reach certain cutting speed, the rotating speed of main shaft will be very high, and at this moment in order to prevent bearing running hot, its pretightening force is essential in time to be reduced.In the senior lathe of this class, all have the control system of best pretightening force.The power unit of pretightening force control the someone done many researchs, as German GMN company used be mechanism shown in Figure 5, the rear bearing of this mechanism is contained in the axially movable piston (4), variation by oil pressure P, just can realize moving forward and backward of piston, make the pretightening force in the front and back bearings controlled.Its shortcoming is the total complexity, and processing link is many, cost is high; In addition, increased slide relative part (piston and casing wall).The essential gapped existence in these positions, thereby the precision of system is reduced.The UKF company of West Germany adopts special bearing as shown in Figure 6 to control pretightening force.When oil pressure P changed, the deformation extent of outer ring was also different, and like this, pretightening force has just obtained adjusting.But, the thin-walled band ditch special bearing that it must be produced with the said firm, versatility is poor, the cost height, and bearing support must add seal arrangement in addition, complex structure the more important thing is that bearing itself is an easily damaged parts, and it is simultaneously as the control actuating component effect, control accuracy can change along with service time like this, made Control Failure.
The objective of the invention is under the prerequisite that does not change former shafting structure, create a kind of highly versatile, rolling bearing pretightening power control unit simple in structure, to realize the control of rolling bearing pretightening power in the precision bearing system.
Structural feature of the present invention is the airtight ring member of a hollow, shown in Fig. 1 and Fig. 4 (6).Annulus external diameter Φ Da is identical with the rolling bearing external diameter; Internal diameter is littler by 5% to 20% than the internal diameter of housing washer; Width does not have strict demand, can be identical with the middle cover width in the former shafting structure; Two operative end surface of annulus are fixing by welding, the metallic elastic film (2) of thickness between 0.05～0.3 millimeter; Intermediate medium abrim in the cavity (3) of sealing, when middle pressure medium changed, elastic film to bearing outer ring, applied different axial forces with outside bulging or contraction, to reach the purpose of control bearing pre-fastening.The closed cavity of annulus (3) is communicated with the endoporus of straight pin (1), and this endoporus and pressure feed system join, and fills intermediate medium and transmits pressure to film (2) by the endoporus of straight pin.Straight pin is fixed on the bearing housing (Fig. 4 (6)), makes the annulus axially locating.On the mating face of straight pin (1) and annulus sealing (5) is set.Intermediate medium can be general hydraulic oil, and the oil hydraulic circuit of the machine that is depended on by axle system is realized control to oil pressure.Intermediate medium shown in Figure 2 is gelatin liquid plastics (1).Make spring (4) produce different decrements by spring compression leg (5), thereby go up the different pressure of generation at piston (3), this pressure is delivered to both sides film (2) by liquid plastics (1), makes film work outside bulging in various degree, reaches the purpose of controlling pretightening force on request.And the motion of spring compression leg (5) can be used cam, machinery such as stroke dog or electric method control.Liquid plastics is difficult for leaking, and makes more convenient.
The invention has the advantages that the position of existing outer middle cover in the primitive axis system with one independently control unit replace, do not change the installation dimension of primitive axis system, control accuracy is not subjected to the influence of service time, so general axis system can be changed into the bearing pre-fastening controllable system, and needn't change and increase other member.It can be used in any rolling bearing structure that needs pretension, no matter be " back-to-back ", " face-to-face " or be arranged in parallel and can both use, thereby highly versatile, control force directly acts on bearing outer ring, and is highly sensitive, simple in structure, cheap.
Description of drawings:
Fig. 1 pretightening force control ring of oil pressure:
1-hollow pin; The 2-metallic thin film;
The 3-pressure chamber; 4-propagation of pressure passage;
The sealing of 5-mating face; The 6-hollow circular ring.
Fig. 2 pretightening force control ring of liquid plastics:
The 7-liquid plastics; The 2-metallic thin film;
The 8-piston; The 9-spring; 10-spring compression leg.
Fig. 3 diamond roller trimming device:
The 11-diamond roller; The 12-rear bearing;
The 13-angular contact ball bearing; Cover in the 14-;
The 15-overcoat; The 16-bearing sleeve.
The installation diagram of Fig. 4 pretightening force regulating ring in the diamond roller trimming device;
The 17-axle; 18-locking screw nurse; The 19-angular contact ball bearing outer ring; Middle cover in the 20-; 6-pretightening force control ring; The 16-bearing sleeve.
The controlled pretightening force main shaft of Fig. 5 GMN company:
The 21-axle; The 22-fore bearing; The 23-rear bearing; The 24-piston sleeve; The 25-oil pocket.
The controlled pretightening force main shaft of Fig. 6 UKF company:
The 29-axle; The 26-pressure oil chamber; The 27-seal ring; 28-thin-walled, trough of belt duplex pretightening force are regulated bearing.
Below by description of drawings one embodiment:
The diamond roller trimming device is used in the finishing of grinder wheel more and more, sees Fig. 3, diamond roller (11) is installed in the middle of the axle, the axle right-hand member is installed coupling (not shown) input power, and the right-hand member of axle is a pair of angular contact ball bearing 7306C(13), left end is 7302C(12).During finishing, contact with the emery wheel outer rim, to rolling, reach the purpose of finishing with different rotating speeds and emery wheel by the outer rim of roller.The surface topography of emery wheel is relevant with the coarse linear velocity with diamond roller of work, and according to the difference of grinding process, the surface topography of emery wheel also wants corresponding different with the work roughness, requires rotating speed variation from 300 rev/mins to 10000 rev/mins of diamond roller.Device among Fig. 3, its pretightening force is uncontrollable, thereby when high speed, bearing often takes place overheated and destroys.Fig. 4 adds pretightening force control ring (6) in the structure of Fig. 3, with the interior cover (14) among original device Fig. 3, be placed on the centre of two bearings (13), becomes interior middle cover (20), and pretightening force control ring (6) is installed between the two bearings outer ring as outer middle cover.All the other all keep former design.
Lower at rotating speed, grinding wheel dressing power is bigger, and when axle system needed higher rigidity, the oil pressure in the pressure chamber (3) raise, and two metallic films (2) outwards expand, and housing washer (19) raises the pretightening force of bearing, and the rigidity of whole system is improved.Otherwise, higher when rotating speed, in order to prevent that oil pressure in the bearing running hot, pressure chamber (3) from reducing, metallic film (2) also reduces the thrust of bearing outer ring (19), thereby reduced the pretightening force of bearing, move under high rotating speed to adapt to whole system.
Claims (6)
1, pretightening force cotroller of rolling bearing, utilize oil pressure to make housing washer produce displacement, realization applies pretightening force to bearing, it is characterized in that the controller member is the airtight ring member (6) of hollow, the external diameter of annulus (6) is identical with the rolling bearing external diameter, internal diameter is littler than the internal diameter of bearing outer ring (19), width is that original outer middle cover width is identical with axle, the both ends of the surface of annulus (6) are metallic elastic film (2), the cavity (3) of annulus (6) is full of intermediate medium, cavity (3) is communicated with the endoporus of straight pin (1), this endoporus and voltage supply system join, straight pin (1) interconnects by the radially circular hole of annulus (6), and straight pin (1) is fixed on the bearing housing (16), and annulus (6) is installed between two housing washers (19).
2, controller according to claim 1 is characterized in that its thickness of metallic thin film (2) between 0.05～0.3 millimeter, is welded on two end faces of annulus (6).
3, controller according to claim 1 is characterized in that annulus (6) internal diameter is littler by 5～20% than the internal diameter of bearing outer ring (19).
4, controller according to claim 1 is characterized in that described intermediate medium is a normal hydraulic oil, utilizes the oil hydraulic circuit control oil pressure of the axle system lathe that depends on, and acts on elastic film (2).
5, controller according to claim 1, it is characterized in that described intermediate medium is gelatin liquid plastics (7), make spring (9) produce different decrements by spring compression leg (10), thereby piston (8) is produced different pressure, and this pressure is delivered to elastic film (2) through this liquid plastics (7).
6,, it is characterized in that the straight pin (1) and the junction of annulus (6) are provided with sealing according to claim 1,4 described controllers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN87105486A CN1003090B (en) | 1987-08-05 | 1987-08-05 | Pretightening force cotroller of rolling bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN87105486A CN1003090B (en) | 1987-08-05 | 1987-08-05 | Pretightening force cotroller of rolling bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN87105486A CN87105486A (en) | 1988-11-16 |
| CN1003090B true CN1003090B (en) | 1989-01-18 |
Family
ID=4815339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN87105486A Expired CN1003090B (en) | 1987-08-05 | 1987-08-05 | Pretightening force cotroller of rolling bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1003090B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4098152B2 (en) * | 2003-05-09 | 2008-06-11 | 株式会社ジェイテクト | Eccentric thrust bearing and suspension built-in wheel using the same |
| CN101934683A (en) * | 2010-08-25 | 2011-01-05 | 安徽华菱车桥有限公司 | Pretightening force regulating device of front axle hub bearing of automobile |
| CN102039924B (en) * | 2010-09-08 | 2015-04-01 | 浙江万达汽车零部件有限公司 | Method for improving natural frequency of steering column |
| CN105312596A (en) * | 2014-07-31 | 2016-02-10 | 许保康 | Hydraulic pretightening structure for bearing |
| CN106402173B (en) * | 2015-07-27 | 2019-11-05 | 舍弗勒技术股份两合公司 | Pre-tightening apparatus and cantilevered axle mounting structure for transverse bearing |
| CN105650132A (en) * | 2016-03-07 | 2016-06-08 | 洛阳轴研科技股份有限公司 | Hydraulic device capable of adjusting bearing preloads |
| CN106623994B (en) * | 2017-02-23 | 2018-05-22 | 沈机集团昆明机床股份有限公司 | Machine-tool spindle system with pre-tightening force adjusting device |
| CN110332231B (en) * | 2019-07-15 | 2021-02-26 | 河北工业大学 | Bearing group capable of actively adjusting temperature and pretightening force |
| CN114473413A (en) * | 2022-01-25 | 2022-05-13 | 中国铁建重工集团股份有限公司 | Oil cylinder constant-pressure pre-tightening device and method for main bearing of tunneling machine |
-
1987
- 1987-08-05 CN CN87105486A patent/CN1003090B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN87105486A (en) | 1988-11-16 |
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