CN211474673U - Full plastic-filled oil rolling bearing - Google Patents

Abstract

The utility model discloses a fill attitude oil rolling bearing of moulding, current holder with outer lane raceway or flange or/and with the clearance undersize of inner circle raceway or/and flange, lead to moulding the unable bearing inside free space that is full of attitude oil fluid, not only restricted the performance of moulding attitude oil lubrication bearing advantage, but also have other negative effects. The utility model discloses under the prerequisite that does not influence bearing performance, improve the unilateral radial clearance between holder and outer lane and the inner circle to more than 0.8 millimeter, to aligning roller bearing, still adopt the design of no well retaining ring, punching press metal holder tufftride, thereby ensured the accessible of moulding the state oil fluid and poured into, it moulds the state oil rolling bearing to obtain fully filling after the heating solidification, make mould the lubricated antifriction bearing antipollution of state oil, anti comdenstion water, anti low-speed, anti swing, advantage such as long lubrication life obtains abundant performance, has very important engineering practical meaning.

Description

Full plastic-filled oil rolling bearing

Technical Field

The utility model relates to a special type antifriction bearing technical field, in particular to full plastic filling state oil rolling bearing (rolling bearing with plastic-state oil or rolling bearing with plastic oil) and manufacturing method thereof.

Background

The plastic state oil is a porous oil-containing lubricating material taking polyethylene or ultrahigh molecular weight polyethylene (UHMWPE) and other polymers as a matrix, and compared with a grease-lubricated bearing, the plastic state oil-lubricated bearing has the outstanding characteristics of pollution resistance, leakage resistance, long lubricating life and the like, so that the plastic state oil-lubricated bearing is widely applied to the fields of agricultural machinery, mining machinery, food and beverage, medicine, textile and the like.

Unlike lubricating grease which is directly added into a bearing for use, plastic oil is a mixture before being added into the bearing, is composed of polymer powder, lubricating oil and additives, is in a viscous fluid state, is heated and cured after being injected into the bearing to form a porous oil-containing lubricating material which is in a plastic state, and is also called as plastic oil. When the bearing works, the lubricating oil in the plastic oil micropores overflows to lubricate the working surface of the bearing under the action of frictional heating and centrifugal force, and when the bearing stops working, the lubricating oil returns to the plastic oil micropores.

When the bearing runs, the plastic oil is different from the random flowing migration of lubricating grease in the bearing, and the positions of the plastic oil in the bearing relative to the rolling body and the retainer are fixed and unchanged, so if the free space in the bearing cannot be filled with the plastic oil fluid during injection, permanent material shortage can occur, the advantages of pollution resistance, condensate water formation resistance, long lubrication life and the like of the plastic oil bearing are influenced, and even the phenomena of discontinuous plastic oil in the bearing, plastic oil skin and poor local lubrication in the bearing can occur. Therefore, the method for filling the viscous fluid of the plastic oil into the inner cavity of the bearing has important engineering and practical significance.

SUMMERY OF THE UTILITY MODEL

A first object of the utility model is to provide a fill dynamic oil rolling bearing of moulding to solve prior art and mould the inside some free space of dynamic oil rolling bearing and not fill into and mould dynamic oil or be full of and mould dynamic oil, the performance of the lubricated advantage of dynamic oil is moulded in the influence and other negative effects's defect appears even.

The utility model discloses the purpose is realized through following technical scheme:

a fully-filled plastic state oil rolling bearing comprises an outer ring, an inner ring, a rolling body embedded between a raceway of the outer ring and a raceway of the inner ring, a retainer and porous plastic state oil containing lubricating materials for providing lubrication for each contact friction pair of the bearing, wherein a radial gap between the retainer and the outer ring or/and the inner ring is arranged to ensure that a plastic state oil fluid is filled in an inner cavity of the bearing without obstruction when injected,

the plastic state oil fluid with the bearing heating solidification back, with the rolling element the holder combines to present the plastic state together, forms rolling element + holder + plastic state oil's subassembly, during the bearing operation, this subassembly revolution, the rolling element is in rotation in holder fenestra or the pocket, what deposited in the plastic state oil micropore lubricating oil spills over from the micropore right the rolling element-outer raceway the rolling element-inner raceway with the contact friction pair that rolling element-holder constitutes lubricates.

Preferably, the fully plastic-filled oil rolling bearing is a fully plastic-filled oil strip window type stamping metal cage self-aligning roller bearing, and is characterized in that the setting of the radial clearance between the cage and the inner ring further comprises:

before the plastic state oil is filled, the unilateral radial clearance between the retainer window bottom, namely the inner edge of the retainer curling edge, and the inner ring raceway is more than 0.8 mm.

Preferably, the fully plastic-filled oil rolling bearing is a fully plastic-filled oil window type stamping metal retainer self-aligning roller bearing, the cross section of the window type stamping metal retainer comprises an inverted L shape, an inclined splayed shape and an inverted Z shape, and the shapes of the corresponding retainer window beams are respectively a large arc shape, a roof shape and an inclined straight shape.

Preferably, the fully plastic-filled oil rolling bearing is a fully plastic-filled oil self-aligning roller bearing with a window type stamping metal retainer, and the bearing is provided with a middle retainer ring without being guided by an outer ring or an inner ring.

Preferably, the fully plastic-filled oil rolling bearing is a fully plastic-filled oil windowed type stamped metal retainer cylindrical roller bearing and a tapered roller bearing, and the setting of the radial clearance between the retainer and the outer ring and the inner ring further comprises:

before the plastic oil is filled, the unilateral radial clearance between the retainer and the outer ring flange or the raceway and the inner ring flange or the raceway is larger than 0.8 mm at least at one side end face of the bearing.

Preferably, the fully-filled plastic state oil rolling bearing is a fully-filled plastic state oil ribbon wave-shaped stamped metal retainer ball bearing, and the setting of the radial clearance between the retainer and the outer ring and the inner ring further includes:

before the plastic state oil is filled, unilateral radial gaps among the retainer, the outer ring flange and the inner ring flange are all larger than 0.8 mm.

Preferably, the width Bc of the edge curl of the window bottom of the window type stamping metal retainer is reduced, so as to enlarge the radial clearance between the retainer and the inner ring; and setting the width Bc of the wave-shaped stamping metal retainer to be reduced so as to enlarge the radial clearance between the retainer and the outer ring or/and the inner ring.

Preferably, the stamped metal retainer is a soft nitrided retainer.

Preferably, the bearing outer ring or the bearing inner ring is provided with no oil groove or oil hole.

Preferably, the plastic state oil comprises a polymer base material, lubricating oil, fatty acid salt and a solid lubricant, the weight ratio is respectively 20-40%, 50-80%, 0.1-1.5% and 0-1%, and the plastic state oil is in a viscous fluid state before being heated and cured; after heated and solidified, the plastic is in a porous oil-containing plastic state, the diameter of each micropore is 1-10 micrometers, and all micropores are communicated with each other in a matrix form.

Preferably, the polymer base material is polyethylene or ultra-high molecular weight polyethylene; the lubricating oil in the plastic oil is industrial grade lubricating oil or food grade lubricating oil; the fatty acid salt is stearate; the solid lubricant is graphite or molybdenum disulfide or polytetrafluoroethylene.

The rolling bearing filled with plastic oil comprises an outer ring, an inner ring, rolling bodies embedded between a raceway of the outer ring and a raceway of the inner ring, a retainer for uniformly separating the rolling bodies along the circumferential direction of the bearing, and porous plastic oil containing lubricating materials for lubricating contact friction pairs of the bearing, wherein the plastic oil at each part in the bearing is mutually communicated and is filled in an inner cavity of the bearing.

The inside plastic state oil intercommunication of bearing and be full of the bearing inner chamber further includes: the plastic state oil completely occupies all the originally existing free spaces which are communicated with each other in the bearing; the free space is an annular space formed by wrapping the outer circle surface of the bearing outer ring, the inner circle surface of the bearing inner ring, the left sealing element of the bearing or the left end face of the bearing and the right sealing element of the bearing or the right end face of the bearing, and the residual space after the occupied space of all bearing part entities included in the annular space is subtracted.

Drawings

FIG. 1A is a cross-sectional view of a prior art oil or grease lubricated self-aligning roller bearing;

FIG. 1B is a side view of a prior art self-aligning roller bearing with oil or grease lubrication;

FIG. 2 is a schematic diagram showing that the plastic oil of the self-aligning roller bearing in the prior art cannot be fully injected;

FIG. 3 is a schematic view of a prior art oil or grease lubricated ball bearing construction;

fig. 4 is a schematic view of a first embodiment of the retainer window beam of the present invention, which is a roof-shaped self-aligning roller bearing structure filled with plastic oil;

fig. 5 is a schematic diagram of a second embodiment of the cage window beam of the present invention, which is a linear structure of the plastic-filled self-aligning oil roller bearing;

fig. 6 is a third schematic diagram of the tapered roller bearing structure filled with plastic oil according to the present invention.

Figure 4 is the utility model discloses fill plastic state oil self-aligning roller bearing structure sketch map (holder window roof beam is roof shape). In the figure, 41 is a bearing outer ring, 42 is a bearing inner ring, 43 is a self-aligning roller, 44 is a window-shaped stamping metal retainer, the cross section of the retainer presents an inclined splay shape, 45 is plastic oil, A1 is retainer window bottom curled edge, Bc is curled edge width, A2 is retainer window beam and presents a roof shape, it can be seen that Bc is reduced, a single-side radial gap i between the retainer and the inner ring is improved to more than 0.8 mm, and the larger the model is, the larger the gap is. The bearing is not provided with a middle check ring, and the outer ring is also not provided with an oil groove and an oil hole. As can be seen in the figure, the plastic oil 45 is fully filled in the bearing, and the plastic oil is continuously communicated in all places.

Fig. 5 is the structural schematic diagram of the plastic-filled self-aligning oil roller bearing (the cage window beam is in a straight line shape). In the figure, 51 is a bearing outer ring, 52 is a bearing inner ring, 53 is a self-aligning roller, 54 is a window-shaped stamping metal retainer, the cross section of the retainer presents an inverted Z shape, 55 is plastic oil, A1 is retainer window bottom curled edge, Bc is curled edge width, A2 is retainer window beam with the shape close to a straight line, A3 is retainer window edge, the retainer window edge is turned outwards, and the shape is close to a straight line, it can be seen that Bc is reduced, the unilateral radial clearance i between the retainer and the inner ring is improved to some extent, and reaches more than 0.8 mm, and the larger the model is, the larger the clearance is. The bearing is not provided with a middle check ring, and the outer ring is also not provided with an oil groove and an oil hole. As can be seen, the plastic oil 55 is filled in the bearing, and the plastic oil is continuously communicated with all the parts.

Fig. 6 is the structural schematic diagram of the plastic-filled tapered roller bearing of the present invention. In the figure, 61 is a bearing outer ring, 62 is a bearing inner ring, 63 is a tapered roller, 64 is a window-shaped stamped metal retainer, the cross section of the retainer is in an inverted L shape, 65 is plastic oil, A1 is a retainer window bottom curled edge, Bc is a curled edge width, A2 is a retainer window beam, and the shape is close to a straight line. The oL and the oR are unilateral radial gaps between the left side retainer and the right side retainer of the bearing and the outer ring raceway respectively, and at least one of the unilateral radial gaps is larger than 0.8 mm; and iL and iR are unilateral radial gaps between the left and right side retainers of the bearing and the inner ring raceway flange respectively, and at least one of the unilateral radial gaps is larger than 0.8 mm.

Detailed Description

The applicant finds that in order to fill the bearing inner cavity with the plastic oil fluid, the plastic oil fluid and a filling process are not enough, and the bearing structure manufactured based on oil lubrication and grease lubrication in the prior art has to be reasonably and purposefully innovated and adjusted according to the requirements of the plastic oil lubrication. In the prior art, for a self-aligning roller bearing, a tapered roller bearing and a cylindrical roller bearing which adopt a window type metal stamping retainer, the retainer is provided with a wider curled edge at the end face of a ferrule, and a single-side radial gap of 0.3-0.8 mm with an inner ring is formed, so that the mechanical strength of the retainer is mainly improved, but great difficulty is brought to injection of plastic oil fluid, the smaller the bearing model is, the smaller the gap is, the greater the injection difficulty is, and the self-aligning roller bearing is provided with a middle retainer ring which basically prevents the plastic oil fluid from flowing from the injection end of the bearing to the other end in the prior art. In the prior art, for ball bearings adopting a wave-shaped metal stamping metal retainer, such as deep groove ball bearings, ball bearings with seats and outer spherical surfaces, in order to improve the strength of the retainer and the stability of ball guiding, the width of the retainer is wider and wider, the gap between the retainer and an outer ring flange and the gap between the retainer and an inner ring flange are smaller and smaller, the middle and small models are more prominent, and the injection and filling of plastic oil fluid are not facilitated. Therefore, in order to fill the bearing inner cavity with the plastic state oil fluid, the fully plastic state oil filled rolling bearing is designed and manufactured, the design structure of the bearings is innovated and adjusted on the premise of not influencing the use performance of the bearing, adverse structures and factors which obstruct the injection of the plastic state oil and fill the free space in the bearing are eliminated, and meanwhile, the injection process of the plastic state oil fluid is innovated and optimized, so that the fully plastic state oil filled rolling bearing is designed and manufactured, the maximum advantage of the lubrication of the plastic state oil is played, and the increasingly personalized and harsh actual engineering requirements are met.

That is, the present applicant has conducted extensive research and analysis on the design and manufacturing method of the existing bearing.

Taking a self-aligning roller bearing, a cylindrical roller bearing and a tapered roller bearing which adopt a window type stamping metal retainer and a ball bearing which adopts a wave type stamping metal retainer as examples (such as a deep groove ball bearing, a spherical outside bearing with a seat and the like), in order to improve the strength of the retainer and the stability of ball guiding, the width of the retainer (or the width of a curled edge at the window bottom of the window type retainer) is wider and wider, the radial clearance between the retainer and an outer ring raceway or raceway flange and/or an inner ring raceway or raceway flange is smaller and smaller, the middle and small type bearings are more prominent, and direct challenges are brought to the injection of plastic oil fluid into the inner cavity of the bearing.

Fig. 1A is a cross-sectional view of an oil-lubricated or grease-lubricated self-aligning roller bearing in the prior art, in which 11 is a bearing outer ring, 12 is a bearing inner ring, 13 is a self-aligning roller, 14 is a window-shaped stamped metal cage, the cross section of the cage 14 presents an inverted L shape, 15 is a middle retainer ring, a1 is a cage window bottom curled edge, Bc is a curled edge width, a2 is a cage window beam which is a circular arc with a large radius, and it can be seen that a unilateral radial gap i between the cage 14 and the inner ring 12 is small due to a large curled edge width Bc. In the drawing, B is used to indicate the oil grooves and the oil holes. Fig. 1B is a side view of a prior art oil or grease lubricated self aligning roller bearing with the colored portion a1 showing the retainer window bottom curl. As can be seen from the figure, a circumferential gap which is large enough exists between two adjacent spherical rollers 13, a radial gap between the cage 14 and the outer ring 11 is large enough, when the viscous fluid of plastic state oil is injected, the viscous fluid of plastic state oil can easily pass through the gap between the cage 14 and the outer ring 11 at the end face of the ferrule, and flow into the free space formed between the window beam a2 of the inner cage 14 and the outer ring 11 of the bearing along the gap between the rollers 13 and the rollers 13, but because the guide gap between the window hole of the cage 14 and the spherical rollers 13, the axial gap between the two cages 14 is small and the middle retainer ring 15 exists (refer to fig. 1A), the fluid of plastic state oil which enters between the window beam a2 of the cage 14 and the outer ring 11 does not flow into the free space formed between the window beam a2 of the cage 14 and the inner ring 12, and because the unilateral radial gap i between the cage 14 and the inner ring 12 is, large size less than 0.8 mm), when the viscous fluid of plastic oil is injected, the viscous fluid is difficult to flow into the free space formed between the window beam A2 of the retainer 14 and the inner ring 12 through the tiny gap between the retainer 14 and the inner ring 12 at the end face of the ferrule, so that the free space between the window beam A2 of the retainer 14 and the inner ring 12 is free of plastic oil, and the plastic oil is seriously starved, as shown in figure 2.

FIG. 2 is a schematic diagram of the self-aligning roller bearing in the prior art that the plastic oil cannot be fully injected. In the figure, 21 is a bearing outer ring, 22 is a bearing inner ring, 23 is a self-aligning roller, 24 is a window-shaped stamping metal retainer, the cross section of the retainer presents an inverted L shape, 25 is a middle retainer ring, 26 is solidified and molded plastic oil and is a part of a fine honeycomb section, A1 is a retainer window bottom curled edge, Bc is a curled edge width, and A2 is a retainer window beam and is a circular arc with a large radius. It can be seen that there is no plastic oil beneath the cage window beam a2, i.e., between the cage 24 and the inner race 22, for the reasons described above with respect to fig. 1A and 1B.

Fig. 3 is a schematic structural diagram of an oil-lubricated or grease-lubricated ball bearing in the prior art. 31 is the outer lane, 32 is the inner circle, 33 is the ball, 34 is punching press metal wave shape holder, Bc is the holder width, i is the unilateral radial clearance between holder and the inner circle, o is the unilateral radial clearance between holder and the outer lane, and prior art is under the certain condition of ball diameter, in order to improve the intensity of holder and to the guide performance of ball, holder width Bc designs and makes more and more widelys for i or o is littleer and more, thereby causes the problem that plastic state oil can not fill fully.

In summary, the design structure of the existing bearing is not suitable for the requirements of the plastic oil rolling bearing:

(1) in order to improve the strength of the retainer and the guide stability of the rolling element, the width of the retainer or the width of a curled edge of the retainer is wider and wider, and the radial clearance between the retainer and an outer ring raceway or a raceway flange and an inner ring raceway or a raceway flange is smaller and smaller, so that the plastic oil is not favorably flowed in.

(2) The self-aligning roller bearing is provided with a middle retainer ring for the stability of the operation of the spherical roller. Taking the middle retainer ring guided by the inner ring as an example (the same applies to the middle retainer ring guided by the outer ring), the middle retainer ring guided by the inner ring is clung to the inner ring and spans between two rows of spherical rollers, even if i is large enough, the plastic oil can enter and fill the free space between one row of the retainer and the inner ring at the injection side, and can not enter and fill the free space between the other row of the retainer and the inner ring due to the obstruction of the middle retainer ring.

(3) For the plastic oil rolling bearing, the oil groove and the oil hole are redundant in design.

The solid retainer bearing, such as a copper solid retainer self-aligning roller bearing, a copper solid retainer cylindrical roller bearing, etc., is not preferred to adopt the solid retainer because the solid retainer occupies more space relative to the metal stamping retainer, so that the injection amount of the plastic oil fluid is less. The problem that the cloth-sandwiched bakelite retainer and the plastic retainer occupy more space compared with a metal stamping retainer is the same, and the temperature of the cloth-sandwiched bakelite and common plastic such as PA66 during the solidification and forming of plastic oil is a challenge because the cloth-sandwiched bakelite and the common plastic are not high-temperature resistant. Therefore, in rolling bearings with solid cages, cloth-sandwiched bakelite cages and plastic cages, the use of plastic oil lubrication is generally not recommended.

The self-aligning roller bearing with the window type stamping metal retainer in the prior art has the following technical characteristics: (1) the cross section of a part, which is contacted with the working surface and the end surface of the single spherical roller and is wrapped by the single spherical roller, of the metal stamping retainer with two windows is in an L shape, namely, a window bottom is a turned edge of the retainer and is in a straight shape, a window beam is in a circular arc shape with a large radius and has no window edge, the difference 2i between the guide diameter (namely the inner diameter of the window bottom of the retainer or the inner diameter of the turned edge) of the retainer and an inner ring and the theoretical intersection diameter of a raceway and the end surface of the inner ring is only 0.7 mm, and the larger bearing model is only 1.6 mm, so that the unilateral radial gap i between the retainer and the inner ring is only 0.35 mm at the end surface of a ferrule and is only 0.8 mm at the larger bearing model, and the specific value is shown in the following; (2) a middle retainer ring (also called a guide ring and a middle spacing ring) guided by the inner ring; (3) the outer ring is provided with an oil groove and an oil hole.

TABLE 1 unilateral radial clearance (unit: mm) between cage and inner race

These technical features, which are not a problem for grease lubrication and even less a problem for oil lubrication, are all based on the design of the bearings using oil lubrication or grease lubrication. Taking a grease-lubricated bearing as an example, when the unilateral radial clearance between the retainer and the inner ring is only 0.35 mm in the minimum model and is also 0.8 mm in the maximum model, grease is injected into the bearing from the clearance before the bearing leaves the factory, but the grease is injected into the bearing from the clearance without reason or necessity, because firstly, the grease injection amount in the bearing is generally only about 30% of the free space in the bearing, secondly, the unilateral radial clearance between the retainer and the outer ring is large enough, thirdly, grease is required to be homogenized before the bearing leaves the factory after grease injection, and the spherical roller can bring the grease between the retainer and the outer ring raceway into the space between the retainer and the inner ring raceway during grease homogenization, thus, when the bearing is used, all contacted friction pair working surfaces can not generate the phenomenon of oil starvation and abrasion at the initial starting stage. By the same token, the retainer ring in the bearing belt does not have any negative influence on the filling of grease and the use of the bearing. Because the grease injection amount in the bearing is only about 30 percent of the free space in the bearing, the gap between the retainer and the outer ring and the circumferential gap between two adjacent spherical rollers are far larger than the diameter of the oil hole, the oil hole does not need to be blocked by taking measures during grease injection, namely the grease injection efficiency is not influenced by the existence of the oil hole. Therefore, the technical characteristics of the self-aligning roller bearing with the window type stamping metal retainer in the prior art can be concluded that no problem or defect exists when oil lubrication or grease lubrication is adopted. On the contrary, the radial clearance between the retainer and the inner ring is small, so that the inner ring has a certain guiding function for the retainer, and the stable operation of the retainer is facilitated; under the condition that the size of the ferrule is unchanged, the smaller radial gap reflects that the width of the edge curl of the retainer at the bottom of the window is larger, which is beneficial to improving the integral strength of the retainer; the middle check ring is provided, so that the two rows of spherical rollers can be separated and guided, the rollers can be prevented from being inclined and slipping, and the bearing is beneficial to stable and reliable operation; the outer ring is provided with the oil groove and the oil hole, so that lubrication supply in the bearing operation service process is facilitated, and the stable and reliable operation of the bearing is also necessary.

From this it can be concluded that: the prior art characteristic of taking window formula punching press metal holder self-aligning roller bearing itself is useful harmless when adopting oil lubrication and fat lubrication scheme, and if remove to adopt the utility model discloses fill the technical characteristic that the attitude oil belt window formula punching press metal holder self-aligning roller bearing of moulding itself explains, then be harmful useless.

The plastic state oil is a porous oil-containing lubricating material, and compared with a grease-lubricated bearing, a fully-filled plastic state oil bearing has the following outstanding advantages: (1) contamination resistance because a fully filled plastic oil bearing leaves no space and possible gaps for foreign contaminants; (2) the anti-low-speed and ultra-low-speed running, the anti-reciprocating swing and even the high-frequency micro-amplitude swing are realized, because the rolling body is wrapped by the plastic oil, the anti-reciprocating swing has a forced lubrication effect on the rolling body, and the abrasion phenomenon caused by the fact that the contact friction pair of the rolling body and the roller path is not timely supplemented with oil does not exist; (3) the formation of condensed water is resisted and the problem of rusting caused by the formation of the condensed water is avoided, because the formation of the condensed water requires two necessary conditions of free space and temperature difference, and now the necessary condition of the free space disappears; (4) the lubrication life is long because base oil which is several times as long as that of the grease-lubricated bearing is sealed into the bearing. When the plastic oil can not fully fill the inner cavity of the bearing, the advantages are discounted, the more the residual free space is, the larger the discount is, even the plastic oil which is not connected with the main body plastic oil and is generated by injecting too little plastic oil raw material into some free spaces in the bearing can be generated, the skin or strip of the plastic oil which exists in isolation exists has the risk of clamping the bearing when the bearing runs. In addition, when the plastic oil can not fully fill the inner cavity of the bearing, the plastic oil can not flow because the plastic oil is combined with the retainer and the ball, the part with material shortage can not be compensated, and the contact friction pair at the part with material shortage can not be lubricated in time in the time period of each start and initial operation of the bearing, so that the risk of abrasion exists, therefore, when the bearing adopts a plastic oil lubrication scheme, the full filling of the plastic oil is important for the bearing.

Taking a self-aligning roller bearing with a window type punching metal retainer as an example, the unilateral radial clearance between the retainer and an outer ring is larger in the prior art, the filling of the plastic oil from the unilateral radial clearance is absolutely not problematic, but the unilateral radial clearance i between the retainer and an inner ring is smaller (as shown in the table 1 above), so that the plastic oil is difficult to be injected from the unilateral radial clearance i; the existence of the middle retainer ring guided by the inner ring basically blocks the flow of plastic oil from the injection side to the other side, so that the problem that the plastic oil of the self-aligning roller bearing with the window type stamping metal retainer cannot be fully injected is solved under the condition that the design of the ferrule and the rolling body is certain, and only the following measures can be considered: (1) increasing the guide diameter of the cage and the inner ring, i.e. the inner diameter of the cage window bottom, but this will result in a reduction in the bead width of the cage at the window bottom, which will not affect the strength of the cage? (2) Does the inner race guide center retainer removed, but does this not affect the smoothness of roller operation? By analyzing the characteristics of the plastic oil lubrication bearing, both measures can be taken, and no negative influence or controllable negative influence is caused after the measures are taken.

The plastic oil fluid injected into the bearing is combined with the roller and the retainer together after being heated and solidified with the bearing to present a plastic state, so as to form a roller + retainer + plastic oil component, when the bearing operates, the component revolves, the roller rotates in a retainer window, and lubricating oil stored in a plastic oil micropore overflows from the micropore to lubricate a roller-outer raceway, a roller-inner raceway and a roller-retainer contact friction pair. The formation of the assembly enables three elements of the roller, the retainer and the plastic oil in the assembly to be bound together, and the three elements are mutually reinforced and stabilized, so that the problem that the plastic oil of the self-aligning roller bearing with the window type stamping metal retainer cannot be fully filled can be completely solved by adopting the two measures. When the cross section of the retainer adopts an inclined splayed shape or an inverted zigzag shape, the structural strength of the retainer and the roller-retainer-plastic oil assembly can be further improved.

As described above, after the plastic oil is formed, the rolling element-cage-plastic oil assembly is formed, and the three components are wrapped together and are inseparable, so as to be reinforced and stabilized, but there is a side effect that once the wear and tear-off object occurs between the cage and the rolling element due to contact friction, the assembly cannot be discharged, and the tear-off object is parasitic between the rolling element-cage contact pair or in the vicinity thereof as a foreign object, which will certainly increase the wear of the rolling element and the cage. The utility model discloses a tufftride holder makes the abrasion resistance of holder obtain promoting by a wide margin, can effectively restrain the emergence of avoiding this side effect even.

Grease lubrication self-aligning roller bearing, the lubrication supply in the bearing operation process of considering, outer lane area oil groove and oilhole are normal or even necessary, however, after adopting the lubricated scheme of attitude oil, because the bearing inner chamber is full of to the attitude oil, has improved the lubricated life-span of bearing by times for the lubrication supply is no longer necessary. When moulding attitude oil fluid and pouring into and heating solidification, if outer lane area oil groove and oilhole, it is excessive that the oilhole is certain can be followed to moulding attitude oil fluid, and its result not only causes the waste, but also causes the unable problem of being full of the bearing inner chamber of moulding attitude oil, must carry out the shutoff to all oilholes, after moulding attitude oil solidification shaping, pulls out the part for the shutoff one by one again, and is very consuming time, moulds attitude oil treatment production efficiency to the bearing and influences obviously, consequently, the utility model discloses no longer design processing oil groove and oilhole on filling attitude oil self-aligning roller bearing outer lane.

Above-mentioned key use fully to fill and mould attitude oil bandwagon formula punching press metal holder self-aligning roller bearing for the example, explained why can not adopt current technical scheme, current technical scheme have which limitation and defect, the utility model discloses technical scheme is what, adopts the utility model discloses technical scheme has what basis, can produce after the adoption which good effect explains, its principle, thinking and scheme are applicable to fully to fill and mould attitude oil bandwagon formula punching press metal holder cylindrical roller bearing and tapered roller bearing, are applicable to fully to fill and mould attitude oil bandwagon shape punching press metal holder ball bearing completely, include but not limited to fully to fill and mould attitude oil deep groove ball bearing and fully fill and mould attitude oil bandwagon insert spherical surface ball bearing etc. and no longer give unnecessary detail here.

Before injecting the viscous fluid of the plastic state oil into the bearing, the bearing and the viscous fluid of the plastic state oil are preheated at different temperatures, which is very favorable for injecting the viscous fluid of the plastic state oil into the inner cavity of the bearing. Preheating the bearing not only temporarily enlarges the internal gap of the bearing, but also eliminates the cooling effect on the plastic oil fluid, which is beneficial to the flowing and filling of the plastic oil fluid in the inner cavity of the bearing. The plastic state oil fluid contains lubricating oil with high viscosity and the proportion can reach 70 percent at most, the higher the viscosity of the lubricating oil is, the larger the flow resistance is, the more unfavorable the injection into the inner cavity of the bearing is, the plastic state oil fluid is heated, the viscosity of the plastic state oil fluid can be obviously reduced, the flow resistance during the injection is reduced, and the flowing and the filling of the plastic state oil fluid in the inner cavity of the bearing are also very favorable. The adoption of the two preheating measures is also significant for efficiently and acceptably manufacturing the fully plastic-filled oil bearing.

A self-aligning roller bearing with a window type stamping metal retainer is characterized in that the cross section of the existing retainer is in an inverted L shape, and the self-aligning roller bearing is composed of a curled edge of the retainer at the bottom of a window and an arc-shaped window beam with a larger radius and has no window edge; the cross section of the retainer is designed and manufactured into an inclined ' splayed ' shape, the window bottom curled edge is the same as that of the prior art, but the window beam is in a relatively open ' herringbone shape or roof shape without a window edge; the cross section of the retainer is designed and manufactured into a Z shape, the edge of the window bottom is the same as that of the prior art, and the window beam is linear and is provided with an outward-turned window edge. Compared with the cage in the prior art, the strength of the cage is further improved.

The plastic state oil is a porous oil-containing lubricating material, and under certain working conditions of bearing operation, the plastic state oil lubricating bearing has unique advantages compared with a grease lubricating bearing and an oil lubricating bearing, but the plastic state oil is different from lubricating grease in many aspects such as a lubricating principle, a filling process, a material form and the like. Plastic oil lubrication is a novel lubrication method, and the design and manufacture of the conventional rolling bearings are based on oil lubrication and grease lubrication, and it is possible to design and manufacture a plastic oil bearing having good quality and good performance by moving the design and manufacture method of the conventional bearings without any consideration and innovation in the design and manufacture of the plastic oil bearings? The answer given by the utility model is negative. In the design of the plastic oil bearing, the principle and characteristics of plastic oil lubrication and the manufacturing process of the plastic oil need to be considered, and the bearing is innovatively designed. The utility model discloses around will moulding the theme that attitude oil is full of the bearing inner chamber, the innovation and the improvement to moulding attitude oil lubrication bearing of taking are all necessary, feasible, can produce very good engineering actual effect moreover, but these innovations and improvements to oil lubrication and grease lubrication bearing, do not necessarily need and feasible, can produce negative engineering effect even.

A fully-filled plastic state oil rolling bearing comprises an outer ring, an inner ring, a rolling body embedded between a raceway of the outer ring and a raceway of the inner ring, a retainer and porous plastic state oil containing lubricating materials for providing lubrication for each contact friction pair of the bearing, wherein a radial gap between the retainer and the outer ring or/and the inner ring is arranged to ensure that a plastic state oil fluid is filled in an inner cavity of the bearing without obstruction when injected,

the plastic state oil fluid with the bearing heating solidification back, with the rolling element the holder combines to present the plastic state together, forms rolling element + holder + plastic state oil's subassembly, during the bearing operation, this subassembly revolution, the rolling element is in rotation in holder fenestra or the pocket, what deposited in the plastic state oil micropore lubricating oil spills over from the micropore right the rolling element-outer raceway the rolling element-inner raceway with the contact friction pair that rolling element-holder constitutes lubricates.

The utility model discloses the biggest innovation point lies in following several points:

1) and a radial clearance between the retainer and the outer ring or/and the inner ring is set, and particularly, the radial clearance between the retainer and the outer ring or/and the inner ring is enlarged. After the increase, at the same side (such as the left side) of the bearing, the unilateral radial gaps among the retainer, the outer ring and the inner ring are all larger than 0.8 mm (the condition may not be met at the other side, namely the right side), and in this case, the plastic oil fluid needs to be injected into the bearing from the left side; or at least, the unilateral radial clearance between the retainer and the outer ring is more than 0.8 mm (the unilateral radial clearance between the retainer and the inner ring is less than 0.8 mm) on one side of the bearing, and the unilateral radial clearance between the retainer and the inner ring is more than 0.8 mm (the unilateral radial clearance between the retainer and the outer ring is less than 0.8 mm) on the other side of the bearing, in this case, the plastic oil fluid needs to be respectively injected into the bearing from the left side and the right side simultaneously or sequentially.

2) Hard obstacles such as a middle retainer ring of the self-aligning roller bearing, which can prevent plastic oil from freely flowing in the inner cavity of the bearing, are not arranged in the bearing;

3) the bearing ring is not provided with an oil groove and an oil hole;

some exemplary embodiments are described below in conjunction with the appended drawings.

Example one

1. Design and manufacture of fully-filled plastic state oil self-aligning roller bearing (retainer window beam is roof-shaped)

As shown in fig. 4, the self-aligning roller bearing filled with plastic oil comprises an outer ring 41, an inner ring 42, spherical rollers 43 embedded between the raceways of the outer ring and the raceways of the inner ring, a retainer 44 for uniformly separating the spherical rollers along the circumferential direction of the bearing, and plastic oil 45 of porous oil-containing lubricating material for providing lubrication to the contact parts of the bearing.

Compared with the plastic oil self-aligning roller bearing in the prior art shown in the attached drawing 2, the self-aligning roller bearing with the window type metal stamping retainer still has the following remarkable different characteristics: (1) the plastic oil fills all the originally existing free space in the bearing; (2) the unilateral radial clearance i between the retainer and the inner ring is obviously increased, and meanwhile, the curled edge width Bc of the retainer window bottom is correspondingly reduced; (3) without a middle retainer ring guided by the outer ring or the inner ring; (4) the cross section of the retainer is in an inclined splayed shape, and the shape of the retainer window beam is in a roof shape; (5) carrying out soft nitriding treatment on the retainer; (6) the outer ring is not provided with an oil groove and an oil hole. Among these several features, feature (1) is guaranteed by feature (2) and feature (3), feature (2) and feature (3) are means, feature (1) is purpose and result; the characteristic (4) makes up the problem of strength reduction of the single retainer caused by the implementation of the characteristic (2) to a certain extent; the characteristics (3), (5) and (6) are targeted technical measures which are adopted according to the unique characteristics of plastic oil lubrication, and are preferred technical schemes.

For a specific model plastic oil roller bearing, taking fig. 2 as an example, the unilateral radial gap i between the retainer and the inner ring is 0.35 mm, and the crimp width Bc of the retainer window bottom is 4.5 mm, in this embodiment, the unilateral radial gap i between the retainer and the inner ring is increased to 1.8 mm, and the crimp width Bc of the retainer window bottom is reduced to 3 mm. The unilateral radial clearance i between the retainer and the inner ring is multiplied and obviously increased, so that when the plastic oil fluid is filled, the fluid can smoothly and freely flow into a free gap between the filled retainer and the outer ring and can smoothly flow into a free space between the retainer and the inner ring on the filling side. The cross section of the retainer adopted by the embodiment is in a roof shape, and the window beam deviates a little distance from the center line of the spherical roller, so that the adverse effect of the strength reduction of the retainer caused by the reduction of the width of the curled edge of the window bottom is counteracted to a certain extent, the stability of roller guide is improved, and the design scheme of the bearing with larger roller diameter and more filling quantity is adopted, so that the bearing capacity of the bearing is improved.

The embodiment adopts the tufftride retainer, so that the abrasion resistance of the retainer is greatly improved, and the abrasion fallen objects cannot be discharged out of a component consisting of the spherical roller, the retainer and the plastic oil after the plastic oil lubrication scheme is adopted, so that the abrasion is further intensified, and the method has more special significance.

The outer ring of the embodiment does not have an oil groove and an oil hole, and because the micro-holes of the plastic oil store base oil which is several times of that stored in lubricating grease in the grease lubrication bearing after the inner cavity of the bearing is filled with the plastic oil, the refilling of the lubricating agent is not necessary. Moreover, with the oil groove and the oil hole, not only are the procedures for processing the oil groove and the oil hole added on the outer ring, but also more importantly, when the plastic oil fluid is filled into the bearing, the sealing measures are required to be taken, and the sealing measures are required to be removed after the plastic oil is heated and solidified, which is time-consuming and labor-consuming.

Example two

2. Design and manufacture of fully-filled plastic state oil self-aligning roller bearing (cage window beam is in a shape of Chinese character 'yi')

As shown in fig. 5, the self-aligning roller bearing filled with plastic oil in this embodiment includes an outer ring 51, an inner ring 52, spherical rollers 53 embedded between a raceway of the outer ring and a raceway of the inner ring, a retainer 54 for uniformly separating the spherical rollers along the circumferential direction of the bearing, and plastic oil 55 made of a porous oil-containing lubricating material for lubricating contact pairs of the bearing. The unilateral radial clearance between the retainer and the inner ring is i, and the retainer window bottom curled edge width Bc.

This embodiment is still a stamped metal holder with windows, but the cross-sectional shape of the holder is different from that of the first embodiment, and the cross-sectional shape is a laid-down "Z" shape, including a window bottom curl a1 portion, a linear window beam a2 portion, and an outward turned window edge A3 portion, compared to the prior art plastic oil self-aligning roller bearing shown in fig. 2, due to the window edge part A3, the strength of the retainer is improved, the adverse effect of strength reduction caused by the reduction of the curled width Bc of the window bottom of the retainer is counteracted, in addition, it can be seen that the distance of the part of the cage window beam a2 deviating from the center line of the spherical roller is larger than that of the plastic state oil self-aligning roller bearing in the prior art shown in fig. 2 and that of the fully-filled plastic state oil self-aligning roller bearing in the first embodiment of the present invention, which is very beneficial to adopting spherical rollers with larger diameters and more quantity, and significantly improves the bearing capacity of the bearing.

Except for the above, the design of the second embodiment is the same as or similar to that of the first embodiment, and is not repeated.

Two embodiments are full filling plastic state oil self-aligning roller bearing, mainly consider: (1) the plastic oil lubrication is particularly suitable for a plurality of application working conditions of the self-aligning roller bearing; (2) the most prominent and typical situation that the plastic state oil of the prior art plastic state oil self-aligning roller bearing is not full of plastic state oil; (3) the self-aligning roller bearing is relatively complicated in structure compared with a cylindrical roller, a tapered roller, a ball bearing, and the like.

EXAMPLE III

3. Design of fully-filled plastic oil tapered roller bearing

As shown in fig. 6, the tapered roller bearing filled with plastic oil comprises an outer ring 61, an inner ring 62, tapered rollers 63 embedded between raceways of the outer ring and the inner ring, a retainer 64 for uniformly separating the tapered rollers in the circumferential direction of the bearing, and plastic oil 65 of a porous oil-containing lubricating material for lubricating contact pairs of the bearing. The retainer is a window type stamping metal retainer, soft nitriding treatment is carried out, the cross section of the retainer is in an L shape, the retainer comprises a window bottom curled edge A1 part and a linear window beam A2 part, a unilateral radial gap between the retainer and a ferrule is shown, a subscript i shows a gap between the retainer and an inner ring, a subscript o shows a gap between the retainer and an outer ring, a subscript L shows the left side of a bearing, a subscript R shows the right side of the bearing, for example, iL shows a unilateral radial gap between the retainer and the inner ring at the left side of the bearing, and the meanings of oL, iR and oR are analogized in sequence.

In the design of the tapered roller bearing in the prior art, iL, oL, iR and oR are all small, and due to the structural limitation of the tapered roller bearing, some sizes of the retainer cannot be adjusted oR the adjustment range is very limited, the following 4 conditions are provided in this embodiment, and as long as the retainer can be adjusted to meet any one of the following conditions, the bearing inner cavity can be filled with the plastic oil fluid:

(1) iL and oL are both larger than 0.8 mm (one of iR and oR is smaller than 0.8 mm), and plastic oil is injected from the left side of the bearing; or

(2) iR and oR are both more than 0.8 mm (one of iL and oL is less than 0.8 mm), and the plastic oil is injected from the right side of the bearing; or

(3) The iL and the oR are simultaneously larger than 0.8 mm (both the oL and the iR are smaller than 0.8 mm), and the plastic oil is injected from the left side and the right side of the bearing; or

(4) And the oL and the iR are simultaneously larger than 0.8 mm (the iL and the oR are both smaller than 0.8 mm), and the plastic oil is injected from the left side and the right side of the bearing.

Fig. 6 shows the case (3) above, i.e. iL and oR are both greater than 0.8 mm (oL and iR are both less than 0.8 mm), the plastic oil fluid needs to be injected from the left and right sides of the bearing simultaneously, from the left side, the plastic oil fluid fills the free space between the cage and the inner ring, from the right side, the plastic oil fluid fills the free space between the cage and the outer ring.

When the plastic oil fluid has to be injected from the left and right sides of the bearing, the plastic oil fluid can be injected from both sides simultaneously, or can be injected from one side and then injected from the other side.

Two embodiments of the fully plastic-filled oil self-aligning roller bearing and one embodiment of the fully plastic-filled oil tapered roller bearing are given above, and other types of fully plastic-filled oil roller bearings are the same or similar in height to the fully plastic-filled oil self-aligning roller bearing, so that detailed description is not needed.

For the rolling bearing lubricated by adopting the plastic state oil, the free space in the bearing is enabled to be as large as possible, and the free space is ensured to be fully occupied by the plastic state oil, so that the advantages of the plastic state oil lubrication, such as pollution resistance, condensed water resistance (further avoiding the corrosion problem caused by the condensed water), low-speed and ultra-low-speed running resistance, swing resistance, long lubrication service life and the like, of the bearing lubricated by the grease are fully exerted.

In the rolling bearing, the design of the ring and the rolling body needs to consider more factors than that of the retainer, so the design is not easy to change, therefore, the design method which is implemented above and can ensure that the plastic oil fully fills the bearing inner cavity is changed and innovated for the retainer, but the embodiment does not exclude that the size and the structure of the bearing ring and the rolling body are adjusted under the necessary condition.

The plastic oil bearing is filled in the inner cavity of the bearing in a plastic state, and the rolling body, the retainer and the plastic oil are combined into a component which revolves together in the running process of the bearing, so that the leakage problem caused by lubricating grease is avoided, and the plastic oil bearing can be directly used without installing a sealing element. If a sealing element is additionally arranged on the plastic oil bearing, the pollution resistance of the bearing can be further improved. When the sealing ring is additionally arranged, a mould or an auxiliary tool is adopted, and when plastic oil fluid is filled, a space for installing the sealing element is reserved.

The rolling bearing (or bearing) filled with plastic oil covers all types and structures of rolling bearings, including single-row, double-row and multi-row ball bearings, cylindrical bearings, needle bearings, conical bearings, self-aligning roller bearings and the like.

EXAMPLE five

This embodiment provides a fill plastic attitude oil rolling bearing, including outer lane, inner circle, embedding outer lane raceway and inner circle raceway between the rolling element, with each rolling element along bearing circumferencial direction evenly separated holder and for the vice porous oily lubricating material plastic attitude oil that provides lubrication of each contact friction of bearing, choose for use and satisfy the utility model discloses above-mentioned technical requirement's antifriction bearing is equipped with and satisfies the utility model discloses the above-mentioned technical requirement's plastic attitude oil fluid is full of the bearing inner chamber and heating solidification with the plastic attitude oil fluid according to the above-mentioned technical requirement of the invention to obtain the porous lubricated oily material plastic attitude oil and fill the full plastic attitude oil rolling bearing that fills and communicate each other in the bearing inner chamber.

The inside plastic state oil intercommunication of bearing and be full of the bearing inner chamber further includes:

the plastic state oil completely occupies all the originally existing free spaces which are communicated with each other in the bearing; the free space is an annular space formed by wrapping the outer circle surface of the bearing outer ring, the inner circle surface of the bearing inner ring, the left sealing element of the bearing or the left end face of the bearing and the right sealing element of the bearing or the right end face of the bearing, and the residual space after the occupied space of all bearing part entities included in the annular space is subtracted. The free space between the retainer and the outer ring on the injection side and the free space between the retainer and the inner ring on the other row of the free space between the retainer and the inner ring are filled with plastic oil fluid completely.

It should be noted that, compared with the prior art, the present embodiment has the following advantages:

1) in the rolling bearing filled with the plastic oil, the plastic oil fluid injected into the bearing is heated and cured together with the bearing, and then is combined with the rolling element and the retainer to be in a plastic state, so that a rolling element + retainer + plastic oil assembly is formed. The formation of the assembly enables the rolling body, the retainer and the plastic oil in the assembly to be bound together, and mutually clamped, strengthened and stabilized. As can be seen, the plastic oil of the embodiment has the forced lubrication property of a 'wrapping' state on the rolling body of the central element in the contact friction pair; after the rolling element + the retainer + the plastic oil component is formed, the strength of the retainer is enhanced, the retainer does not need to be guided by a flange or a raceway of an inner ring or an outer ring, and the rolling element does not need to be guided by components such as a middle retainer ring, so that the precondition is created for reducing the width of the retainer, expanding the gap between the retainer and the inner ring or/and the outer ring, removing the middle retainer ring and the like.

2) In the prior art, bearings are designed based on oil lubrication and grease lubrication, in order to improve the guiding capacity of a ferrule to a retainer, the guiding capacity of the retainer to a rolling element and the strength of the retainer, the width of the retainer is increased, and the gap between the retainer and an outer ring and the gap between the retainer and an inner ring are designed to be smaller and smaller, in particular to a bearing with a stamping metal retainer (a self-aligning roller bearing, a cylindrical roller bearing, a tapered roller bearing, a deep groove ball bearing, a spherical outside bearing with a seat and the like), in particular to a bearing with a window type stamping metal retainer (a self-aligning roller bearing, a cylindrical roller bearing, a tapered roller bearing and the like), and the bearing is also provided with a middle retainer ring guided by the inner ring or the outer ring, all of which form hard obstacles for the entering of plastic oil fluid into the bearing and the flowing and filling of the plastic oil fluid in, the method directly causes the shortage of molding plastic oil, thereby causing serious problems of poor local lubrication in the bearing (especially the initial stage of each start and operation of the bearing), generation of condensed water in the bearing, further corrosion, shortened integral lubrication service life of the bearing and the like. On the basis of the above deep analysis on the principle and characteristics of plastic oil lubrication, the applicant overcomes the technical prejudice of the industry, and makes design and structure innovation and adjustment on the bearings, including but not limited to setting the width of the retainer to be reduced and setting the radial clearance between the retainer and the outer ring or/and the inner ring to be increased, so that the plastic oil fluid can enter the inner cavity of the bearing without obstruction when being injected; and removing elements such as a middle check ring and the like which obstruct the plastic oil fluid from flowing and filling in the inner cavity of the bearing, so that the plastic oil fluid is filled in the inner cavity of the bearing without obstruction, thereby realizing the full filling of the plastic oil fluid into the bearing, and obtaining the fully-filled plastic oil rolling bearing after heating and curing.

3) By adopting a novel retainer structure, such as a window type stamping metal retainer with an inclined splayed cross section and an inverted zigzag cross section, the adverse factors caused by the reduction of the width of the retainer are made up, and the strength of the retainer is further improved. After the metal retainer is subjected to soft nitriding treatment, and the rolling body, the retainer and the plastic oil component are formed, the abrasion particles of the retainer cannot be discharged out of the component, so that the adverse factor of aggravating abrasion is reduced to the minimum.

4) And on the basis of analyzing and grasping the lubricating property and the filling property of the plastic oil, the bearing outer ring and the bearing inner ring are not provided with an oil groove and an oil hole, so that the machining cost is reduced, the injection and solidification treatment cost of the plastic oil is reduced, and the manufacturing efficiency of the plastic oil is obviously improved.

5) When the fully-filled plastic oil rolling bearing is manufactured, the bearing and the plastic oil fluid are preheated in a temperature difference manner before injection, so that the plastic oil can enter and fill the inner cavity of the bearing, and the fully-filled plastic oil rolling bearing has double positive meanings of improving the production efficiency and ensuring the full filling of the plastic oil.

By adopting the above measures, the present embodiment can practically achieve the following technical effects: the full filling of the plastic oil in the bearing inner cavity is ensured, and the efficient manufacturing of the fully filled plastic oil bearing is ensured, so that the damage to the bearing operation caused by the shortage of the plastic oil is avoided, and the technical quality advantage of the plastic oil lubricating bearing relative to an oil lubricating bearing and a grease lubricating bearing is exerted to the maximum extent. The above disclosure is only for the purpose of describing several embodiments of the present application, but the present application is not limited thereto, and any variations that can be considered by those skilled in the art are intended to fall within the scope of the present application.

Claims (12)

1. A fully-filled plastic oil rolling bearing is characterized by comprising an outer ring, an inner ring, a rolling body embedded between a raceway of the outer ring and a raceway of the inner ring, a retainer and porous plastic oil containing lubricating materials for providing lubrication for each contact friction pair of the bearing, wherein a radial gap between the retainer and the outer ring or/and the inner ring is arranged to ensure that a plastic oil fluid fills an inner cavity of the bearing without being blocked when being injected,

the plastic state oil fluid with the bearing heating solidification back, with the rolling element the holder combines to present the plastic state together, forms rolling element + holder + plastic state oil's subassembly, during the bearing operation, this subassembly revolution, the rolling element is in rotation in holder fenestra or the pocket, what deposited in the plastic state oil micropore lubricating oil spills over from the micropore right the rolling element with outer raceway the rolling element with interior raceway with the contact friction pair that rolling element and holder constitute lubricates.

2. The fully plastic filled oil rolling bearing of claim 1, wherein the fully plastic filled oil rolling bearing is a fully plastic filled oil windowed stamped metal cage self-aligning roller bearing, and providing a radial clearance between the cage and the inner race further comprises:

before the plastic state oil is filled, the unilateral radial clearance between the retainer window bottom, namely the inner edge of the retainer curling edge, and the inner ring raceway is more than 0.8 mm.

3. The fully plastic-filled oil rolling bearing according to claim 1, wherein the fully plastic-filled oil rolling bearing is a self-aligning roller bearing with a window-type stamped metal retainer, the cross-sectional shape of the window-type stamped metal retainer comprises a laid L-shape, an inclined splayed shape and a laid zigzag shape, and the shapes of the retainer window beams corresponding to the cross-sectional shapes of the retainer window beams are respectively a large circular arc shape, a roof shape and an inclined straight shape.

4. A fully plastic filled oil rolling bearing as claimed in claim 1 wherein the fully plastic filled oil rolling bearing is a fully plastic filled oil with window stamped metal cage self aligning roller bearing provided without a central retainer ring guided by the outer ring or by the inner ring.

5. The fully plastic filled oil rolling bearing of claim 1 wherein the fully plastic filled oil rolling bearing is a fully plastic filled oil windowed stamped metal cage cylindrical roller bearing and a tapered roller bearing, and wherein providing a radial clearance between the cage and the outer and inner races further comprises:

before the plastic oil is filled, the unilateral radial clearance between the retainer and the outer ring flange or the raceway and the inner ring flange or the raceway is larger than 0.8 mm at least at one side end face of the bearing.

6. A fully filled oil rolling bearing as claimed in claim 1 wherein the fully filled oil rolling bearing is a fully filled oil ribbon stamped metal cage ball bearing, the providing of the radial clearance between the cage and the outer and inner races further comprises:

before the plastic state oil is filled, unilateral radial gaps among the retainer, the outer ring flange and the inner ring flange are all larger than 0.8 mm.

7. A fully plastic filled oil rolling bearing according to any one of claims 2 to 5 wherein the width of the bead Bc of the window of said windowed stamped metal cage is reduced to increase the radial clearance between said cage and said inner ring.

8. A fully plastic filled oil rolling bearing according to any one of claims 2 to 5 wherein the window stamped metal cage is a soft nitrided cage.

9. A fully filled oil rolling bearing according to claim 6, wherein the width Bc of the corrugated stamped metal cage is arranged to decrease to increase the radial clearance between the cage and the outer ring or/and the inner ring.

10. A fully filled oil rolling bearing according to claim 6 or 9 wherein the corrugated stamped metal cage is a soft nitrided cage.

11. A fully plastic filled oil rolling bearing according to claim 1, 5 or 6 wherein the bearing outer ring or inner ring is provided without oil grooves and holes.

12. The full plastic state oil filled rolling bearing is characterized by comprising an outer ring, an inner ring, rolling bodies embedded between a raceway of the outer ring and a raceway of the inner ring, a retainer for uniformly separating the rolling bodies along the circumferential direction of the bearing and porous plastic state oil containing lubricating materials for providing lubrication for contact friction pairs of the bearing, wherein radial gaps between the retainer and the outer ring or/and the inner ring are arranged, so that plastic state oil fluid is filled in an inner cavity of the bearing in an unimpeded manner when the plastic state oil fluid is injected, and the plastic state oil in the bearing is communicated with each other and filled in the inner cavity of the bearing.

Images