CN1017542B - Bearings and bearing assemblies - Google Patents

Abstract

A sliding contact bearing (2), which may be used as a replacement for conventional ball and roller bearings, comprises a rotating bearing member (4) adapted to be mounted for rotation with a rotatable shaft and being in the form of a sleeve with at least one flange (17), and a stationary bearing member (6) being split radially and/or axially into two or more parts (12, 13) each having a groove (14, 15) such that when the parts of the stationary bearing member (6) are assembled about the rotating bearing member (4), the grooves are complementary to the circumferential flange (17) to facilitate location and relative rotation of the bearing members.

Description

Bearings and bearing assemblies

In general, the present invention relates to bearing and the bearing means that comprises assembly and bearing support, specifically relating to race ring element or assembly is split type, more particularly, invention includes the bearing of complementary fit face, for example has for a bearing element is positioned the yin, yang fitting surface of usefulness with respect to another bearing element.The present invention relates to a kind of replaceable or replace the common ball or the novel bearing of roller bearing.

Though the present invention is by being introduced with reference to having complementary flange of positioned internal and groove structure, but should point out, the present invention is not limited, and scope can be wider, and it can comprise the bearing of other structure and the application of complementary fit face and the others except that bearing.

Common various multi-form ball or roller bearing generally include an inner ring element that is securely fixed on the running shaft, so that correspondingly rotate with axle; Comprise that is fixed on the outer ring on the stationary element; Also comprise by the retainer between inside and outside coil element or flange or like and be fixed on ball or roller on the appropriate location.Ball or roller are kept inside and outside coil element and are rotated relative to one another, usually, because the retainer around ball or the roller has wave-like, so there are hole nest or depression in the side of ball bearing or roller bearing.

With a problem of various forms of common balls or roller bearing associated be, when damage of bearings or in the latter stage in working life, they can not be at the scene or the building site be repaired, and must change a brand-new bearing.In many cases, inner ring is fixedly connected on the axle, and the dismounting bearing need spend sizable strength, also needs equipment and funds.On the contrary, the invention provides a kind of permission at the scene or the entirely disassembled bearing structure in formula ground, the replaceable then part that one or several has worn and torn.And can ressemble bearing, thereby to have avoided be the operation of the whole bearing of expensive time-consuming again replacement.

The problem of ball that another is common or roller bearing associated is that all parts all are made of metal.Between these elements, for example between race ring and ball or roller.Be the contact of metal between ball or roller and the retainer, metal to metal contact makes the bearing parts scratch, produces lacklustre spot, rust staining or the like, thereby has reduced bearing working life.On the contrary, a part in bearing provided by the invention or the bearing unit is made with plastics, to reach the effect that does not produce the metal to metal contact.In some other embodiment, bearing can use sandwich type structural, and wherein metal and the mutual arranged alternate of plastic element are so that the contact of unlikely generation metal to metal.

The general in the past ball that plastic part is arranged or another problem of roller bearing are mounting and positioning devices outside, for example for exactly bearing fixing on axle and keep bearing member in place, a pair of opposed installing ring spaced from each other must be set.Two outer installing rings are set usually, and a place, any side that is arranged on bearing is used to make bearing outer ring with respect to the bearing inner race location of choosing a last position as required in advance.When using bearing, the mutual friction slip of each part produces heat, thereby makes heat accumulation in bearing.Because bearing heating gradually, so part outwards expands on radial and axial.Because have only very little gap outside between installing ring and the bearing, thus when bearing when roller rotates, increased the heat of bearing, bearing is expanded rapidly withstands outer installing ring, finally cause bearing stuck.In prior art, bearing comprises plastic components, and the heat of Chan Shenging can make plastic molting in some cases, so bearing is damaged.On the contrary, the invention provides a kind of built-in, form holistic positioning device with bearing, because heat savings is when expanding bearing, because also expansion thereupon of positioning device, so can be not stuck.The inner positioning device of installing promptly can separate with bearing surface, also can constitute the part of bearing surface.

Common bearing particularly is equipped with the bearing of plastic part, and another problem that those bearings ran into that plastic part is fixed on the part that relatively moves of bearing is that they require well-trained people that replacement bearing and positioning device are installed.When changing bearing and bearing parts at the scene, the gap of the outer installing ring of levelling will be judged by the technician.The too small meeting in gap makes bearing heating, thereby has reduced working life, and excesssive gap can make the bearing swing, causes too early wearing and tearing.Therefore, the technician needs the location and installation ring is adjusted in the quite limited tolerance range.On the contrary, positioning device of the present invention is to process with the tolerance of precision in factory.Because do not need the outside fix installing ring, thus do not need the technician to carry out any judgement, thereby at the scene dress just not have the people when changing bearing be the error component that causes.

Another problem chemistry, physics and biological pollution that common ball and roller bearing exists may appear in bearing or the bearing unit, and this is being open form in varying degrees, at outer surface gap, pit etc. because of common bearing.The pollution of grit, water, bacterium etc. can cause bearing surface to get rusty or burn into this can reduce the working life of bearing again.Because the present invention has bearing surface not to be exposed in the environment, be not subjected to the influence of environment, and the outside is level and smooth basically, thereby reduced the contaminated possibility of bearing of the present invention to greatest extent.

Another problem that the pass is housed with common metal bearing is the problem of bearing support.For example cast-iron chock, in the gap, produce corrosion, burn into biological pollution etc. when the metal shaft bearing is used for a long time.Food industry is not meet the requirements as produce this pollution in meat-industry plant, milk, medical industry.Because its may contaminated food products, cause too early burn into to cause waste.

Therefore the object of the present invention is to provide a kind of corrosion resisting bearing, its all or part of being made of plastics can be dismantled at an easy rate and assemble and do not needed ball or roller between the bearing race.

According to a kind of bearing that is used for axle or similarity piece of the present invention, comprising:

The clutch shaft bearing device of a bearing housing form;

Second bearing means is rotatably installed on the described bearing housing, it is characterized in that:

Described clutch shaft bearing device is fixedly connected on the described axle, and one of described first and second bearing meanss comprise a continuous flange.Another comprises the bearer ring of the ring of mutual linking, bearer ring is installed in the both sides of described flange separately, each described bearer ring comprises the groove of an annular, described groove is connected mutually and forms an annular groove, be used for holding described flange, limit the mutual axial motion between described first and second bearing meanss whereby, and allow relative rotary motion between first and second bearing meanss, the radial section of described second bearing means is circular, axial section is middle convex-shaped surface, and at least one in described first and second bearing meanss is made of plastic.

A kind of canonical form of the present invention relates to a kind of bearing support by filling glass thermoplastic materials, polyester resin mold pressing or machine shaping.The another kind of canonical form of the present invention relates to a kind of bearer ring, and this bearer ring can arbitrarily be placed in the bearing support by mold pressing of identical or different artificial synthetic thermoplastic resins material or processing.In addition, the invention still further relates to a kind of whole part, all be bearing means as bearing support, bearer ring and hollow shaft by plastic production.

The present invention also belongs to the stationary axle carrier ring that will make of artificial synthesizing polymeric material and is contained in the above-mentioned bearing support, this bearer ring connects or is contained on the rotatable hollow shaft or bearing housing of making by typical corrosion resistant metal, as stainless steel, the hollow shaft of this form of the present invention can be equivalent to the inner ring of common ball or roller bearing, and the bearer ring of bearing of the present invention can be equivalent to the outer ring of plain bearing.

Bearing means according to the present invention comprises that an outer bearing element centers on and accept the outer surface of described second bearing means, the outer bearing element comprises the surface configuration complementation of internal surface itself and described second bearing means of a recessed shape, the outer bearing element rotation and make bearing and described centering relatively of described whereby second bearing means.

The outer bearing element can be the various forms of bearing support, for example, pillow block, thrust bearing or flanged (FLGD) bearing support also can be that a race ring provides a die guide rail cam follower.

Should be pointed out that especially bearer ring of the present invention and tubular shaft member have replaced the race ring of rolling bearing, do not need ball, roller, retainer etc. have been saved the expense of making them, and can replace cast-iron chock with the plastic shaft bearing.

The present invention generally also relates to and replaces or replacement rolling bearing or similar products, be particularly related to the combine bearing unit of element of metal and synthesizing polymeric material, this bearing unit is suitable for replacing or exchanging the common die guide rail cam follower of roller or needle bearing.

Bearing modified model of the present invention is a kind of cam follower, and it comprises the bearer ring of a combination, and this bearer ring is contained on the hollow shaft, and hollow shaft and bearer ring are formed a bearing operation surface that does not have ball or roller.The bearer ring of this combination remains on the central flange of hollow shaft by a suitable fastening piece.

Design of the present invention also expands to two ball-type bearings, random automatic-positioning type ball bearing, and wherein ball bearing and race ring are replaced by the bearer ring/hollow shaft of a combination, and the bearer ring of combination leans against on the flange of hollow shaft.

An annular flange flange can be set on one of first, second bearing means, another is provided with groove, on the outer surface of clutch shaft bearing device continuous flange is set so in one embodiment, two annular grooves that are connected mutually is set on the internal surface of second bearing means is used for holding above-mentioned flange.

Among another embodiment, the continuous annular flange flange of inwardly stretching out is set on second bearing means, the clutch shaft bearing device comprises bearing housing, and on the outer surface of clutch shaft bearing device groove is set.

Second bearing means preferably comprises the bearer ring of a pair of mutual linking, makes or molded with synthetic polymer, does not for example have the thermoplastic polymer of the local-crystalized state of reinforcing material and makes, and is for example made by the polyethylene phthalic acid.

Part material of the present invention can be plastics, pottery, glass, pure carbon, carbon fiber, graphite impregnation material, Kai Fula (Kevlar) etc. or their combined material.

Typical clutch shaft bearing device is a bearing housing or hollow shaft, it is fixedly attached on the revolving part, for example is connected on the axle of rotation, so that rotate with the axis.

Typical second bearing means is that a bearer ring or race ring are rotatably installed in clutch shaft bearing device outside, is made up of the annulus of a pair of radially split type.

Each annulus is provided with around recess, the convex shoulder of ring circumference configuration, digs pit or groove, when install on the toroidal surface opposite, each recess or analogous shape element overlap, so that constitute a groove or analogous shape, the male member of the complementation on the inner bearing ring is rotated in this groove.

Another form of bearing structure of the present invention can comprise the fixedly outer bearing element of a filling glass, thermoplastic material polyester resin in assembling condition, it can be a bearing support, the outer bearing element that automatic-positioning type does not rotate; Adjustable fixed bearing block or the space element in the outer bearing element and the inner bearing element of a rotation that hard synthetic polymeric material is made.

The notched surface of Kong Youyi on the bearing support, the surface is a concave curvatures, and the outer surface of automatic-positioning type bearing member is the convex surface of ring, and it cooperates with the indent curved surface of bearing support, and two curved surfaces are to be made by different synthesizing polymeric materials.

Bearer ring is two segments that match, each segment is and has the cup-shaped of convex surface, it has external peripheral surface and interior stepped surfaces, and when bearer ring was contained on the bearing support, the outer surface of each segment and the curved inner peripheral surface of bearing support fovea superior formed the surface of the automatic location of a circumference, convex.

Before second bearing means and hollow shaft or bearing housing were adorned bearing support in couples, interior stepped surfaces was contained on the circumferential flange of inner bearing element in couples, for example is contained on the flange on the stainless steel hollow shaft.

The present invention also comprises the method for making bearing means, and it comprises that second bearing means with two bearer ring forms identical, that interior ladder fitting surface is arranged installs on the hollow shaft in couples, and second bearing means is made by synthesizing polymeric material.Circumferential flange on the hollow shaft is suitable for allocating in the interior circular groove that the bearer ring of second bearing means constitutes.The bearer ring of second bearing means constitutes an excircle convex surface, and this convex surface matches with indent circumferential surface on the bearing support, and bearing support can have identical or different synthetic or polymer material with second bearing means.

The inner bearing element of bearing of the present invention can be formpiston or the former part that complementary fit is connected, and therefore, second bearing means can be corresponding former or formpiston part.Formpiston partly is a flange, it can be the sectional shape of square, rectangle, crooked shape, wedge shape or similar shape, or arbitrary suitable desirable or easy sectional shape, or the sectional shape of combination, the groove or the groove that combine as straight flange and curve end.Because in use, the formpiston flange rotates in the former groove, with relative second bearing means of inner bearing ring location and a supporting surface is provided, so between former groove or annular groove and the formpiston flange with small tolerance interworking.

Flange width can extend arbitrarily with respect to the width of bearing, can be from almost waiting until mutually that with bearing width the lip that is very thin can.Internal bearing sleeve can be the manufacturing of metal or plastics, and outer collar bearing also can be with metal or plastic materials manufacturing.Inside and outside bearing element can be a plastic materials entirely.

Flange can be the continuous or discontinuous otch that has, and they match with recess or groove.In addition, the thermodiffusion device can be installed, as radiating fin, recessed screw thread etc. on flange.One of heat radiation form of the present invention is groove spiral or screw thread, or the spiral shell ridge on the flange side surface.The height of the depth ratio flange of spiral or thread groove or spiral shell ridge is little a lot.Bearing of the present invention can be rigid bearing or automatic positioning bearing, perhaps can be radial load bearing or thrust bearing or journal for axial load.

Second bearing means of the present invention can be provided with the overall fixed circle ring device, so that annulus directly be fixed on substrate or bearing support or have on other parts of bearing machine, therefore do not need to be provided with independent bearing support in some applications, annulus needs not to be ring like this, and can adopt any shape.

Some embodiments of the present invention are described with reference to the accompanying drawings.

Fig. 1 is the assembly perspective exploded view of a kind of form in the bearing of the present invention;

Fig. 2 is the partial sectional view along 2-2 line among Fig. 1;

Fig. 3 is bearing broken section and the partial side view that is assembled together among Fig. 1 and Fig. 2;

Fig. 4 is the perspective view of a kind of form in the bearing support of the present invention, has wherein embedded automatic-positioning type bearing of the present invention;

Fig. 5 is the front view of the bearing support showed of Fig. 4, and solid line is represented bearing normal position in use, and dot and dash line is expressed as and takes out bearing and position after turning 90 degrees from bearing;

Fig. 6 is the sectional view along 6-6 line among Fig. 5;

Fig. 6 a is the perspective view of a kind of form of the bearing support behind the taking-up bearing unit;

Fig. 7 is second embodiment's of a bearing unit of the present invention perspective view, showed simultaneously represent with dot and dash line, turn 90 degrees later position of bearings for taking out bearing;

Fig. 8 is the sectional view along 8-8 line among Fig. 7;

The sectional view of Fig. 9 another embodiment of the present invention;

Figure 10 is another an embodiment's of the present invention sectional view.

With reference to accompanying drawing, what Fig. 1 represented is a kind of simple form of bearing 2 of the present invention, and this form comprises the clutch shaft bearing device, and it is a hollow shaft or the internal bearing sleeve 4 and second bearing means, and it is a bearer ring or static outer bearing ring 6.Bearer ring or outer ring 6 are a pair of combination segment or split type annulus, i.e. two identical segments or annulus 10,11, they are made by synthetic polymeric thermoplastic resin material, and for example, the trade mark of selling on that Wei Sike (Vesco) Plastics Company is produced, the market is VESCONITE plastics etc.

Yet it should be noted that any suitable desirable or suitable material can be used for making annulus 10,11.The outer surface 12,13 of one convex bending is arranged respectively on each annulus 10,11, and have 14,15, two annulus of interior ladder surface to be suitable for being combined together Face to face respectively and form pair of bearings ring 6, rotating hollow shaft 4 rotates in bearer ring 6.Hollow shaft 4 is equivalent to rotating inner ring in the conventional bearing, and the most handy stainless steel is manufactured, and has the circumferential flange 17 of circle of position side face central authorities, it should be noted that can leave a kind of plastics or metal of hollow shaft 4 manufacture.Circumferential flange 17 is suitable for being placed in the bearer ring interior surface, promptly is placed in by interior ladder surface 14,15 to cooperate in the annular groove 18 that constitutes.When two annulus on hollow shaft to fashionable, ladder surface 14,15 be positioned at two the ring inner surfaces, as shown in Figure 3.

Though the flange shown in the figure is square or the squarish cross section, but should note, flange can adopt any simple, suitable or desirable shape, as square, rectangular, curvecd surface type, like the combination of lip or these shapes, as the straightsided shape of band nose circle.Certainly, be combined together the groove 18 that constitutes by ladder surface and have appearance profile with the complementation of flange profile.The optimised form of flange is that slight circular edge is arranged on the circumferential surface.In addition, the flange of any number all can or separate setting brokenly along the wall of hollow shaft 4 rule, and certainly, corresponding several grooves should be formed by the annular groove of splitting.Although represented two opposite opened annular grooves in the accompanying drawing, should expect, the opposite opened annular groove that several are faced can be set.

With reference to Fig. 4 to 6, the bearing that is assemblied among shown bearing and Fig. 1 to 3 in outer bearing element or the bearing support 20 is approximate.Bearing support in the illustrated embodiment is a thrust bearing form, and still, bearing support can be taked any form, as pillow block, flange or the like, perhaps as in another embodiment, can install the overall fixed device on the bearer ring 6, this device plays the effect of bearing support.

The bearer ring 6 that is made of two subdivision annulus has outer convex surface, because the outer surface of every annulus 10,11 is convex surfaces, be positioned at the external diameter maximum of two annulus apposition positions, around the external diameter minimum at bearer ring 6 sides places, the convex external surface of the bearer ring after the assembling should be designed to can be chimeric and remain in the spill circumferential inner surface 31 of the complementary shape on the bearing support 20.Also molded or manufacturing of bearing support 20 by the synthesizing polymeric material material, as thermoplastic materials, polyester resin, preferable VALO * 420 trade mark resins that are filling glass or glass fibre, make as General Electric Co. Limited.To drive then or bearing that the driven shaft (not shown) passes assembling is laid.

When using at a high speed,, grease nipple can be installed arbitrarily for the lubricating bearings surface.

With reference to Fig. 4 to 6a, wherein bearing means also comprises a bearing support 20, an inner ring or hollow shaft 4 and bearer ring 6.Bearer ring has the annulus 10,11 of the split type of 12,13 and two symmetries of outer convex surface.The outer surface of each annulus all is processed into convex surface.There is the hole of the bearing support 20 of interior breach and inner sunken face 31 to have the complete front face 23 of continuous periphery formation and the rear surface 24 that promptly disconnects of part by breach, it up and down on the vertical arc of equidistant extension, is breach to form than the bearing support aperture wideer passage of remaining part that its periphery ends at along bearing support imagination horizontal central line.Passage is the centre that breach extends to the bearing support both sides vertically, to form two identical breach 25,26, portion is tapered from the top to bottom along radius for breach, form opening at the bearing support back side, therefore bearer ring and hollow shaft assembly can be used as integral body around disassembling from bearing support as Fig. 5, dotted line horizontal rotational shaft 90 degree shown in Figure 6, promptly by breach bearer ring and hollow shaft assembly linear type are shifted out bearing support.Perhaps opposite, when being horizontal,, bearer ring and hollow shaft group linear type are moved in the bearing support, and then assembly revolved to turn 90 degrees get final product by the breach on the rear wall that opens wide.

(not shown) in another structure of bearing support of the present invention and bearer ring, hollow shaft, the bearer ring external peripheral surface can be replaced convex surface with the plane, the inner circumferential surface of bearing support also can correspondingly replace concave curved surface with the plane, and bearer ring and hollow shaft can utilize the circular mounting ring that is contained on every side to be fixed in the bearing support.

Another embodiment of the two circle bearings of the present invention is described below with reference to Fig. 7, Fig. 8.

Two circle bearing meanss 30 comprise bearer ring 34 and flanged stainless steel hollow shaft 32 of combination, and this hollow shaft is packed into the employed method in the plastic shaft bearing shown in being installed in bearer ring and hollow shaft on Fig. 4 to Fig. 6 a of being similar in the stainless outer shroud 36 that continuous outer surface arranged.The inner circumferential surface 45 of the ring that continuous surface is arranged of the present invention or its remodeling disconnects along a certain angular range, and is processed to form the concave curvatures of taper along same direction.Bearer ring and hollow shaft assembly are horizontal by moving in the horizontal direction in they enter outer shroud always, when they in outer shroud during with 20 upsets of the relative bearing support of the described method of similar above, this assembly can change the working position over to, and like this, this assembly just is assembled in the outer shroud.

To illustrate in greater detail this structure below.Outer shroud (bearing support) the 36th, smooth outer surface 43, this groove 44 of being manufactured by " 316 " stainless steel, have 41,42 and centres of identical flat sidewall to have shallow circumferential groove 44 extend around the outer shroud whole outer surface.This outer shroud 36 has a spill inner circumferential surface 45, and the channel slot 46,47 that this surface is oppositely arranged along diameter disconnects.Channel slot 46,47 radially partly stretches into the spill inner circumferential surface of outer shroud, and this channel slot 46,47 is used for the receiving axes carrier ring.The part of cutting away on the sidewall of these two channel slots by outer shroud forms, has an axial inside boundary wall that on the V-arrangement inclined-plane, forms with reference to channel slot 46, this channel slot, so that the convex external surface of the segment 35,37 of the synthetic bearer ring of assembled group, the most handy synthesizing polymeric material of bearer ring is manufactured, as Fan China Lars material (FECHNAPLAS) not. Segment 35,37 is installed on the stainless steel hollow shaft 32, join with the central outward flange 17 on the hollow shaft 32, bearer ring hollow shaft assembly in the outer shroud of spill wall around its axis of symmetry turn 90 degrees with its centering before, can prevent that bearer ring/hollow shaft assembly hollow shaft 32 when meeting at right angles the position with outer shroud from inserting bearing shell too much.With reference to the channel slot on the outer shroud 46, this channel slot is to be formed by the inner side surface 47 that cuts away outer shroud, this channel slot has crooked a radial sidewalls 49,50 and a platform 48, and radial sidewalls 49,50 partly extends on the outer shroud vertically, and its preceding seamed edge 51 is straight substantially.

With reference to Fig. 8, the hole 52 of hollow shaft can be that as shown in the figure taper or lineal shape is cylindrical or has the shape of same inner diameter in the axial direction.

Fig. 9 represents another embodiment, and wherein the hollow shaft 60 of bearing means is by subdivision radially and have a circular groove 62, and bearer ring 64 has a flange 66 with groove 62 rotations.In this embodiment, bearer ring 64 is cut open vertically rather than radially, has adopted bearing cap or similar structure.Bearing support or outer shroud 68 can be provided with around bearer ring 64.

Below with reference to Figure 10, an alternative embodiment of the invention-cam follower is described.Cam follower bearing unit 80 shown in Figure 10 comprises the bearing of a combination, this bearer ring is made up of two identical mating parts annulus 81,82, and with identical mold pressing or the sclerosis synthesizing polymeric material, as carbon fiber, or the polyester resin that graphite impregnation, glass fibre or shredded fibre are strengthened is made.Annulus 81,82 is contained on the hollow shaft made from stainless steel that circumferential flange 86 is arranged 83, and its interior ladder surface 84,85 and flange 86 are joined.One has the stainless steel outer shroud 87 that outside track operation surface 88 is arranged that constitutes the track cam follower and surrounds bearer ring.This track cam follower is provided with a concave surface 89 with the outer convex surface complementation of each annulus 81,82.The bearing unit that bearer ring and hollow shaft are formed is packed into behind the outer shroud work internal surface, is fixed together with link again.In this embodiment, link is a solid tap bolt 90, different alternative securing meanss such as press fit locking element one class can be housed on its bolt shank, for example packing ring 91 or nut, or can the auger shell hole on the solid hopkinson bar of tap bolt or on the hollow shaft 83, so that with (not shown)s such as one or more grub screws 120, A Lan (Allan) screws, tap bolt is clamped in the bearing, the end of bolt 118 can be smooth or threaded.

The advantage of bearing of the present invention is, than going slick of common metal bearing, in the situation that adopts a large amount of bearings, for example in indoor induction system, each roller of induction system is equipped with two bearings at least, adopts this moment bearing noise of the present invention significantly to reduce. Because can run into unhealthful and security problems when in limited space, using a large amount of various metal bearings, so when enclosed environment, wish the reduce noise.

Another advantage is the negative and positive adapting device of this bearing element, and this device is because with two bearing element relative positionings, and has increased area supported in the situation that does not strengthen bearing element appearance and size.

This bearing is corrosion-resistant, resistant to rust and pollution etc., and this is because outer surface is smoother, locking device and area supported are arranged in bearing inside and are not exposed to cause in the external environment.

Claims (10)

1, a kind of bearing that is used for axle or similarity piece comprises:

The clutch shaft bearing device of a bearing housing form,

Second bearing means is rotatably installed on the described bearing housing, it is characterized in that:

Described clutch shaft bearing device is fixedly attached on the described axle, one of described first and second bearing meanss comprise a continuous flange, another comprises the bearer ring of the ring of mutual linking, bearer ring is installed in the both sides of described flange separately, each described bearer ring comprises the groove of an annular, described groove is connected mutually and forms an annular groove and is used for holding described flange, limit the mutual axial motion between described first and second bearing meanss whereby, and allow relative rotary motion between first and second bearing meanss, the radial section of described second bearing means is circular, axial section is middle convex-shaped surface, and at least one in described first and second bearing meanss is made of plastic.

2, bearing according to claim 1, it is characterized in that device comprises that an outer bearing element centers on and accept the outer surface of described second bearing means, the outer bearing element comprises the surface configuration complementation of internal surface itself and described second bearing means of a recessed shape, the outer bearing element rotation and make bearing and described centering relatively of described whereby second bearing means.

3, bearing according to claim 1, it is characterized in that described clutch shaft bearing device comprises the continuous annular flange flange that is provided with on its outer surface, described second bearing means comprises two grooves that the annular groove that is connected mutually constitutes on internal surface, is used for holding described flange.

4, bearing according to claim 1 is characterized in that described second bearing means is provided with the continuous annular flange flange of inwardly stretching out, and described clutch shaft bearing device comprises bearer ring, and on the outer surface of clutch shaft bearing device groove is set.

5, bearing according to claim 2, it is characterized in that described outer bearing element is included in mutual opposed groove on a pair of diametric(al) on its internal surface, when bearing is not positioned on the described axle, second bearing means outer bearing element relatively rotates to a position, be substantially perpendicular to the axis of described outer bearing element at its axis of this position, described outer bearing element is included in mutual opposed groove on a pair of diametric(al) on its internal surface, when first, when two bearing meanss are positioned on the described rotational position, allow described second bearing means and clutch shaft bearing device to unload from the outer bearing element.

6, bearing according to claim 2, it is characterized in that described bearing be removably mounted on described axle go up with and be suitable for further being fixed on the described axle.

7, bearing according to claim 2 is characterized in that described bearing housing by stretching out on described second bearing means, and the extension of described bearing housing is provided with fixing device and is used for described bearing housing is fixed on described axle.

8, bearing according to claim 2 is characterized in that described second bearing means keeps static with respect to described outer bearing element, and described bearing surface is as the contact surface between the described bearing housing and second bearing means.

9, bearing according to claim 2, the internal surface that it is characterized in that described outer bearing element provide the relative rotation matching surface between an outer bearing element and described second bearing means.

10, bearing according to claim 2 is characterized in that first and second bearing meanss lock together by a fixing device.

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