CN1258046C - Synthetic resin thrust bearing - Google Patents
Synthetic resin thrust bearing Download PDFInfo
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- CN1258046C CN1258046C CN 01121076 CN01121076A CN1258046C CN 1258046 C CN1258046 C CN 1258046C CN 01121076 CN01121076 CN 01121076 CN 01121076 A CN01121076 A CN 01121076A CN 1258046 C CN1258046 C CN 1258046C
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Abstract
The present invention relates to a thrust bearing made of synthetic resin, which is provided with an upper shell body and a lower shell body which are made of synthetic resin and a bearing sheet which is arranged between the upper shell body and the lower shell body and is made of synthetic resin, wherein the outer circumference of the upper shell body is elastically arranged on the outer circumference of the lower shell body to form a thrust bearing made of synthetic resin. At least one of the upper shell body and the lower shell body is formed by adding olefin copolymers and polyacetal of a functional group in a heat plasticity elastomer containing a certain proportion of styrene. The bearing sheet is made of polyethylene resin composed of ultrahigh molecular weight polyethylene with the intrinsic viscosity of 10 to 40 dl/g and low to high molecular weight polyethylene with the limit viscosity of 0.1 to 5 dl/g. The bearing of the present invention can smoothly slide without friction sound.
Description
Technical field
The present invention relates to synthetic resin thrust bearing, particularly be suitable for being assembled in the synthetic resin thrust bearing on traveller connecting rod (Mai Fuxun) the formula suspension in the four-wheel-type automobile.
Background technique
Usually, strut and link suspension mainly is the front-wheel that is used for the four-wheel-type automobile, is to make up disc spring in strut assemblies, and this strut assemblies is being in the urceolus of one hydra-shock absorber to be housed with main shaft.The structure of above-mentioned suspension can be divided into two kinds: (1) make energetically disc spring the relative pillar of axis axis and setover, the piston lever of reducer that is loaded on this pillar in making slides smoothly; (2) make the axis of disc spring consistent with the axis of pillar.These two kinds of structures all are between the upper springs seat of the installation component of car body and disc spring bearing to be set, and its objective is for this revolution is able to along sliding into row.
And, on this bearing, have because of supporting body load (thrust load) and adopt radial load that suspension frame structure causes in action, promptly, in former structure because of the axis of disc spring axis bias, so under static state also can be because of disc spring produces radial load to the recuperability of pillar axes direction, in latter's structure with respect to pillar, owing to the axis of pillar and the axis of disc spring will be configured on the same axis, the difficulty in the making can cause angular error and cause radial load to produce.
For satisfy above-mentioned requirement, rolling bearing that is to use roller or needle roller that on this bearing, adopted or synthetic resin sliding bearing in the past.Yet rolling bearing can cause ball or needle roller fatigue damage because of small sway or vibration loading etc., is difficult to keep steering operation flexibly.Again, the synthetic resin sliding bearing has strengthened the sense of heaviness of steering operation than the friction ractor height of above-mentioned rolling bearing.And, no matter use any bearing, all to invade the dust cover of packing into and forming to slip surface for preventing foreign matters such as dust by rubber elastomer, friction increases as a result, the sense of heaviness that causes steering operation, particularly when using the synthetic resin sliding bearing, steering operation is more heavy.
For solving above-mentioned bearing problem in the past, the inventor provides (real fair 2-6263 number) scheme the clear 61-196804 of real hope number.Illustrate with reference to the accompanying drawings below.In Fig. 7, synthetic resin controlling push-force axle 1 comprises: plastic upper body 10, plastic lower case 20 and being configured on this, lower shell body 10,20 plastic bearing plate 30, upper body 10 is provided with the discoideus planar surface portion 12 that central part has circular hole 11, the engaging hook portion 14 that integrally formed cylinder engages dip portion 13 and engages the end inner peripheral surface formation of dip portion 13 at this cylinder in the outer periphery of this discoideus planar surface portion 12, lower case 20 is provided with the cylindrical part 22 with inner peripheral surface that through hole 21 is decided, outer circumferential face in this cylindrical part 22 makes the part 23 of this cylindrical part 22 protrude the ring-type wide cut lip part 24 that the back forms, the engagement portion 26 that engages bump 25 with the integrally formed cylinder in the outer periphery of this ring-type wide cut lip part 24 and on the lower end outer circumferential face of this cylinder engaging bump 25, form, this engaging hook portion 14 flexibly is installed on the engagement portion 26 of this lower case 20, so that this upper body 10 and lower case 20 are made up.
Above-mentionedly real be willing to that the synthetic resin thrust bearing that proposes in clear 61 1 No. 19680 communiques is with the problem that solves synthetic resin sliding bearing in the past, promptly prevents that dust etc. from invading the bearing slip surface and being its purpose, can solve because of the problem of the steering force that dust cover the caused increase of being made up of rubber elastomer is installed around slip surface between this slip surface, and can do one's utmost to prevent that dust etc. from invading slip surface, obtain stable and steering force flexibly.
Yet, as shown in Figure 8, above-mentioned synthetic resin thrust bearing cause because of above-mentioned suspension frame structure radial load, promptly because of the axis of disc spring with respect to the axis bias of pillar, so when under static state the radial load that also produces to the recuperability of pillar axes direction because of disc spring acts on this bearing, the engaging hook portion 14 that forms at the end inner peripheral surface of the cylinder of upper body 10 engaging dip portion 13 is collided mutually with the engagement portion 26 that the cylinder in lower case 20 engages the lower end outer circumferential face formation of bump 25, tends to produce stridulation.Again, adopt the upper and lower part housing 10,20 and the synthetic resin system of the bearing plate 30 that is configured in 10,20 of this upper and lower part housings to make up, can between upper and lower part housing 10,20 and bearing plate 30, produce crawl, tend to give birth to stridulation because of this crawl.
Again, though as long as add the desirable oiling agents such as butter that are filled in usually between this upper and lower part housing 10,20 in each gap between 10,20 of upper and lower part housings and upper and lower casing 10,20 and bearing plate 30, can eliminate above-mentioned stridulation basically, but because of the effect of radial load or thrust load and use oiling agent disappearance etc. for a long time, often can not guarantee the oiling agent perfect condition in each gap.
The inventor has inquired into the generation reason of this stridulation, and the result has found its reason from the synthetic resin that the synthetic resin system that forms the upper and lower part housing and formation are configured in the bearing plate between the housing of upper and lower part.
Summary of the invention
The present invention is exactly in order to address the above problem, its purpose is, even provide a kind of can effectively the utilization to be willing to that in fact clear 61-196804 number the original advantage of synthetic resin system synthetic resin thrust bearing, the oiling agent in each gap of while do not reach the synthetic resin thrust bearing that perfect condition also can not produce stridulation.
For achieving the above object, the synthetic resin thrust bearing of the present invention's the 1st technological scheme possesses plastic upper body, plastic lower case and being configured on this, synthetic resin system bearing plate between lower case, this upper body is by on the outer periphery that its outer periphery flexibly is installed in lower case and be combined into synthetic resin thrust bearing with this lower case, it is characterized in that, on being somebody's turn to do, at least one side of lower case forms by containing the polyacetal resin that has added olefin copolymer and functional group in a certain proportion of polystyrene thermoplastic elastomer and this polystyrene thermoplastic elastomer, olefin copolymer is by ethylene-propylene-olefinic rubber 30～70 weight %, the vinylacetic acid salt content is constituted by the copolymer 1～25 weight % of the alkene-1 of vinyl-vinyl acetate copolymers 29～70 weight % of 18～40 weight % and ethene and carbon number 4～6, polyacetal resin is by polyacetal resin 100 weight portions, olefin copolymer 0.3～10 weight portion and polystyrene thermoplastic elastomer 0.1～1.0 weight portion that has added functional group constitute, and this bearing plate is that the polyethylene resin that the ultra-high molecular weight polyethylene of 10～40dl/g and low molecular weight to High molecular weight polyethylene that limiting viscosity is 0.1～5dl/g are formed constitutes by limiting viscosity.
Polyacetal resin is with the synthetic resin of of the same race or xenogenesis during as subject material, can bring into play good especially sliding properties, the synthetic resin thrust bearing of the present invention's the 1st technological scheme is by thereon, at least one side of lower case is by this polyacetal resin, particularly by containing a certain proportion of polystyrene thermoplastic elastomer, and the polyacetal resin that this polystyrene thermoplastic elastomer has added olefin copolymer and functional group forms, even so cause this position generation sliding friction because of the effect that the is subjected to radial load elastic mounting part between the outer periphery of the outer periphery of upper body and lower case produces interference, also this radial load can be born sleekly, stridulation can be do not produced.Again, the polyacetal resin of the 1st technological scheme is made of polyacetal resin 100 weight portions, olefin copolymer 0.3～10 weight portion and polystyrene thermoplastic elastomer 0.1～1.0 weight portion that added functional group, and the bearing plate that synthetic resin thrust bearing is configured between this upper and lower part housing is that the ultra-high molecular weight polyethylene of 10～40dl/g and polyethylene resin that limiting viscosity is formed by low molecular weight to the High molecular weight polyethylene of 0.1～5dl/g are constituted by limiting viscosity.Therefore have high mechanicalness intensity, wearability and low friction property, can not produce the creep of material, can carry out the slip of upper and lower part housing and bearing plate sleekly, when the slip of upper and lower part housing and bearing plate, can not produce crawl, can not cause stridulation because of this crawl.
The synthetic resin thrust bearing of the present invention's the 2nd technological scheme is in the synthetic resin thrust bearing of the 1st technological scheme, and polyacetal resin also contains the lubricating oils of 0.1～10 weight portion ratio with respect to polyacetal resin 100 weight portions,
Oiling agent in the synthetic resin thrust bearing of the 2nd technological scheme preferably adopts for example spindle oil, engine oil, turbine oil, dynamo oil, refrigerator oil, cylinder oil, gear wet goods mineral oil, hydrocarbons such as mobile paraffin, paraffin wax, Tissuemat E, fatty acid esters such as stearoyl stearate, mountain Yu acid 20 diester, glycerol monostearate; Artificial oils such as polyethyleneglycol, polyhenylene ether, silicone; Whale oil, castor-oil plant wet goods vegetable and animals oils; Metallic soap such as sodium stearate, zine stearate; Natural wax such as Carnauba wax, Montan wax etc.
The synthetic resin thrust bearing of the present invention's the 3rd technological scheme is in the synthetic resin thrust bearing of the 1st or the 2nd scheme, and the content ratio of the ultra-high molecular weight polyethylene in the polyethylene resin of being made up of ultra-high molecular weight polyethylene and low molecular weight to High molecular weight polyethylene accounts for ultra-high molecular weight polyethylene and low molecular weight 15～40 weight % to the gross weight of High molecular weight polyethylene.
The synthetic resin thrust bearing of the present invention's the 4th technological scheme is in the synthetic resin thrust bearing of the 1st or the 2nd scheme, plastic upper body comprises: central part has the discoideus planar surface portion of circular hole, the engaging hook portion that integrally formed cylinder engages dip portion and engages the end inner peripheral surface formation of dip portion at this cylinder in the outer periphery of this discoideus planar surface portion, plastic lower case comprises: central part has and the circular hole of the described upper body discoideus planar surface portion with the through hole in footpath, the cylindrical part identical that forms above the cylindric planar surface portion at this with this through hole internal diameter, radius vector to foreign side and this cylindrical part separate decide to engage bump at the integrally formed cylinder in the outer periphery of this discoideus planar surface portion at interval, and in the engagement portion that the lower end outer circumferential face of this cylinder engaging bump forms, this upper body will be by engaging hook portion elasticity and be installed in the engagement portion of this lower case and making up with lower case.
Adopt the synthetic resin thrust bearing of the 4th technological scheme, the upper and lower part housing is to be installed on the engagement portion of this lower case and combination mutually by the engaging hook portion elasticity with this upper body, so but the utmost point is finished assembling operation simply.And, even the synthetic resin thrust bearing of the 5th technological scheme produces interference and causes this position generation sliding friction because of the effect that is subjected to radial load makes engaging hook portion in the cylinder of upper body engaging dip portion engage elastic mounting part between the engagement portion of bump with the cylinder of lower case, also form by described polyacetal resin owing at least one side of upper and lower part housing, therefore this radial load can be born sleekly, stridulation can be do not produced.
The synthetic resin thrust bearing of the present invention's the 5th technological scheme is in the synthetic resin thrust bearing of the 4th technological scheme, plastic bearing plate is made of less than the plectane of this cylinder engaging bump internal diameter greater than this cylindrical part external diameter, external diameter internal diameter, the slip underneath of the discoideus planar surface portion of top and this upper body of this plectane contacts, the top sliding contact of the discoideus planar surface portion of following and this lower case of this plectane so is configured between this upper and lower part housing.
Adopt the synthetic resin thrust bearing of the 5th technological scheme, because plastic bearing plate is formed by described polyethylene resin, be configured between this upper and lower part housing, the slip slyness of upper and lower part housing and bearing plate is carried out, between upper and lower part housing and bearing plate, can not produce crawl, thus can be because of this crawl sound that causes friction.
The synthetic resin thrust bearing of the present invention's the 6th technological scheme is in the synthetic resin thrust bearing of the 1st or the 2nd scheme, plastic upper body comprises: central part has the discoideus planar surface portion of circular hole, separate the cylinder dip portion that institute decide the interval setting from this circular hole periphery radius vector to foreign side, radius vector to foreign side and this cylinder dip portion separate decide to engage dip portion at the integrally formed cylinder in the outer periphery of this planar surface portion at interval, engaging hook portion in the inner peripheral surface formation of the end of this cylinder engaging dip portion, plastic lower case comprises: central part has and the circular hole of the described upper body discoideus planar surface portion with the through hole in footpath, the cylindrical part identical that forms above the discoideus planar surface portion at this with this through hole internal diameter, radius vector to foreign side and this cylindrical part separate decide at interval and at this cylinder bump integrally formed above discoideus planar surface portion, radius vector to foreign side and this cylinder bump separate decide to engage bump at the integrally formed cylinder in the outer periphery of this discoideus planar surface portion at interval, and in the engagement portion that the lower end outer circumferential face of this cylinder engaging bump forms, this upper body by with the cylinder bump of cylinder dip portion and this lower case radially overlapping and will engage hook portion elasticity and be installed on the engagement portion of this lower case and make up with lower case.
Adopt the synthetic resin thrust bearing of the 6th technological scheme, since upper body be by with the cylinder bump of cylinder dip portion and lower case radially overlapping and will engage hook portion elasticity and be installed on the engagement portion of lower case and make up with lower case, therefore overlapping between this cylinder dip portion and cylinder bump and engage hook portion and the elastic mounting part of engagement portion forms sealed department because of the labyrinth acts on is so can prevent between intrusion upper and lower part housing such as sharp dust.
Again, adopt the synthetic resin thrust bearing of the 6th technological scheme, even take place to disturb and cause this position to produce sliding friction because of being subjected to radial load to engage elastic mounting part between the engagement portion of the engaging hook portion of dip portion and ring-type bump at overlapping between the cylinder bump of the cylinder dip portion of upper body and lower case and cylinder, also form by described polyacetal resin because of at least one side of upper and lower part housing, so can slyness bear this radial load, can not produce stridulation.
The synthetic resin thrust bearing of the present invention's the 7th technological scheme is in the synthetic resin thrust bearing of the 6th technological scheme, plastic bearing plate is made of less than the plectane of this cylinder bump internal diameter greater than this cylindrical part external diameter, external diameter internal diameter, the slip underneath of the discoideus planar surface portion of top and this upper body of this plectane contacts, the top sliding contact of the discoideus planar surface portion of following and this lower case of this plectane so is configured between this upper and lower part housing.
Adopt the synthetic resin thrust bearing of the 7th technological scheme, because plastic bearing plate is formed by described polyacetal resin, be configured between this upper and lower part housing, therefore can carry out the slip of upper and lower part housing and bearing plate sleekly, between upper and lower part housing and bearing plate, can not produce crawl, thus can be because of this crawl sound that causes friction.
The synthetic resin thrust bearing of the present invention's the 8th technological scheme is in the synthetic resin thrust bearing of the 1st or the 2nd scheme, plastic upper body comprises: central part has the discoideus planar surface portion of circular hole, be located on this circular hole periphery and the 1st cylinder dip portion identical with this circular hole internal diameter, to the outer circumferential face of radially foreign side and the 1st cylinder dip portion separate decide to be located at interval this discoideus planar surface portion below the 2nd cylinder dip portion, radius vector to foreign side and the 2nd cylinder dip portion separate decide to engage dip portion at the integrally formed cylinder in the outer periphery of this planar surface portion at interval, the engaging hook portion that the end inner peripheral surface of vertical component effect forms under this cylinder engaging, plastic lower case comprises: central part has and the circular hole of the described upper body discoideus planar surface portion with the through hole in footpath, at this this through hole of process and ring-type shoulder and the 1st integrally formed cylinder bump above discoideus planar surface portion, this above discoideus planar surface portion radius vector to foreign side and the 1st cylinder bump separate decide the 2nd integrally formed at interval cylinder bump, radius vector to foreign side and the 2nd cylinder bump separate decide to engage bump at the integrally formed cylinder in the outer periphery of this discoideus planar surface portion at interval, the engagement portion that the lower end outer circumferential face that protrudes in the engaging of this cylinder forms, this upper body by with the 1st cylinder bump of the 1st cylinder dip portion and this lower case radially overlapping, with the 2nd cylinder bump of the 2nd cylinder dip portion and this lower case radially overlapping, and will engage hook portion elasticity and be installed on the engagement portion of this lower case and make up with lower case.
Adopt the synthetic resin thrust bearing of the 8th technological scheme, since upper body by with the 1st cylinder bump of the 1st cylinder dip portion and this lower case radially overlapping, with the 2nd cylinder bump of the 2nd cylinder dip portion and this lower case radially overlapping, and will engage hook portion elasticity and be installed on the engagement portion of this lower case and make up with lower case, so overlapping portion between the 1st cylinder dip portion and the 1st cylinder bump, between the 2nd cylinder dip portion and the 2nd cylinder bump overlapping and engage hook portion and the engagement portion between elastic mounting part forms sealed department because of the labyrinth effect, so can prevent in the intrusion such as sharp dust, between the lower case.
Again, adopt the synthetic resin thrust bearing of the 8th technological scheme, even produce to disturb and cause this position to produce sliding friction because of being subjected to radial load to engage elastic mounting part between the engagement portion of bump with cylinder in the engaging hook portion that overlapping between the overlapping portion between the 1st cylinder cylinder bump of the 1st cylinder dip portion of upper body and lower case, the 2nd cylinder dip portion and the 2nd cylinder bump and cylinder engage dip portion, also form by described polyacetal resin because of at least one side of upper and lower part housing, so can slyness bear this radial load, can not produce stridulation.
The synthetic resin thrust bearing of the present invention's the 9th technological scheme is in the synthetic resin thrust bearing of the 8th technological scheme, plastic bearing plate by internal diameter greater than the 1st cylinder bump external diameter, external diameter constitutes less than the plectane of the 2nd cylinder bump internal diameter, the slip underneath of the discoideus planar surface portion of top and this upper body of this plectane contacts, the top sliding contact of the discoideus planar surface portion of following and this lower case of this plectane, so be configured on this, between the lower case
Adopt the synthetic resin thrust bearing of the 9th technological scheme, because plastic bearing plate is formed by described polyethylene resin, be configured between this upper and lower part housing, therefore can carry out the slip of upper and lower part housing and bearing plate sleekly, between upper and lower part housing and bearing plate, can not produce crawl, thus can be because of this crawl sound that causes friction.
The synthetic resin thrust bearing of the present invention's the 10th technological scheme is in the synthetic resin thrust bearing of the 1st or the 2nd scheme, plastic upper body comprises: central part has the discoideus planar surface portion of circular hole, integrally formed and identical the 1st cylinder dip portion below discoideus planar surface portion with this circular hole internal diameter, radius vector to foreign side and the 1st cylinder dip portion separate decide at interval and below discoideus planar surface portion integrally formed the 2nd cylinder dip portion, radius vector to foreign side and the 2nd cylinder dip portion separate decide at interval and below discoideus planar surface portion integrally formed the 3rd cylinder dip portion, radius vector to foreign side and the 3rd cylinder dip portion separate decide to engage dip portion at the integrally formed cylinder in the outer periphery of discoideus planar surface portion at interval, engaging hook portion in the inner peripheral surface formation of the end of this cylinder engaging dip portion, plastic lower case comprises: central part has and the circular hole of the described upper body discoideus planar surface portion with the through hole in footpath, at this this through hole of process and the 1st integrally formed cylinder bump of ring-type shoulder above discoideus planar surface portion, radius vector to foreign side and the 1st cylinder bump separate decide at interval and at this 2nd integrally formed above discoideus planar surface portion cylinder bump, radius vector to foreign side and the 2nd cylinder bump separate decide at interval and at this 3rd integrally formed above discoideus planar surface portion cylinder bump, radius vector to foreign side and the 3rd cylinder bump separate decide to engage bump at the integrally formed cylinder in the outer periphery of this discoideus planar surface portion at interval, and in the engagement portion that the lower end outer circumferential face of this cylinder engaging bump forms, this upper body by with the 1st cylinder dip portion and the 2nd cylinder dip portion separately with the 1st cylinder bump of this lower case and the 2nd cylinder bump radially overlapping, with the 3rd cylinder bump of the 3rd cylinder dip portion and this lower case radially overlapping, and the engaging hook portion elasticity of this cylinder engaging dip portion is installed in this lower case cylinder engaging bump the engagement portion and make up with lower case.
Adopt the synthetic resin thrust bearing of the 10th technological scheme, overlapping portion between the 1st cylinder dip portion of upper body and the 1st cylinder bump of lower case, overlapping portion between the 2nd cylinder dip portion and the 2nd cylinder bump, the engaging hook portion that between the 3rd cylinder dip portion and the 3rd cylinder bump overlapping and cylinder engage dip portion engages elastic mounting part between the engagement portion of bump because of labyrinth effect formation sealed department with cylinder, therefore, on can preventing that not only dust etc. from invading, between the lower case, even cause this position to produce sliding friction because of being subjected to radial load to make them produce interference, also because of last, lower case at least one side formed by described polyacetal resin, so can bear this radial load sleekly, can not produce stridulation.
The synthetic resin thrust bearing of the present invention's the 11st technological scheme is in the synthetic resin thrust bearing of the 10th technological scheme, plastic bearing plate is made of less than the plectane of the 3rd cylinder bump internal diameter greater than the 2nd cylinder bump external diameter, external diameter internal diameter, the slip underneath of the discoideus planar surface portion of top and this upper body of this plectane contacts, the top sliding contact of the discoideus planar surface portion of following and this lower case of this plectane so is configured between this upper and lower part housing.
Adopt the synthetic resin thrust bearing of the 11st technological scheme, because plastic bearing plate is formed by described polyethylene resin, be configured between the housing of upper and lower part, therefore can carry out the slip of upper and lower part housing and bearing plate sleekly, between upper and lower part housing and bearing plate, crawl can be do not produced, thereby the stridulation that causes because of this crawl can not be produced.
The synthetic resin thrust bearing of the present invention's the 12nd technological scheme is in the synthetic resin thrust bearing of the 5th scheme, and this lower case has the integrally formed in its lower section cylindrical part identical with this through hole internal diameter.
In addition, in the synthetic resin thrust bearing of the 6th to the 12nd technological scheme, the upper and lower part housing also all is that the engaging hook portion elasticity with this upper body is installed on the engagement portion of this lower case and combination mutually, so its assembling operation is extremely simple.
Description of drawings
Fig. 1 is the sectional view of the present invention's the 1st example one example.
Fig. 2 is the plan view of synthetic resin system bearing plate shown in Figure 1.
Fig. 3 is the sectional view of the present invention's the 2nd example one example.
Fig. 4 is the sectional view of the present invention's the 3rd example one example.
Fig. 5 is the sectional view of the present invention's the 4th example one example.
Fig. 6 is the sectional view of the present invention's the 5th example one example.
Fig. 7 is the sectional view of synthetic resin thrust bearing in the past.
Sectional view when Fig. 8 acts on synthetic resin thrust bearing shown in Figure 7 for radial load.
Embodiment
Below, with reference to illustrated suitable example explanation the present invention and example thereof.But the present invention is not limited to these examples.
In Fig. 1 and Fig. 2, the plastic bearing plate 300 that the synthetic resin controlling push-force axle 1 of the 1st example of this example has plastic upper body 100, plastic lower case 200 and is configured in 100,200 of this upper and lower part housings.Plastic upper body 100 comprises: the engaging hook portion 104 that central part has the discoideus planar surface portion 102 of circular hole 101, integrally formed cylinder engages dip portion 103 and engages the end inner peripheral surface formation of dip portion 103 at this cylinder on the outer periphery of this discoideus planar surface portion 102.Plastic lower case 200 comprises: central part has and the circular hole 101 of the described upper body 100 discoideus planar surface portion 202 with the through holes 201 in footpath, in this cylindrical part 203 identical integrally formed above discoideus planar surface portion 200 with these through hole 201 internal diameters, radius vector to foreign side and this cylindrical part 203 separate decide at interval and integrally formed and engage bump 205 with this cylindrical part 203 and cooperation forms annular recessed portion 204 above the discoideus planar surface portion 202 cylinder in the outer periphery of this discoideus planar surface portion 202, and the engagement portion 206 that engages the lower end outer circumferential face formation of bump 205 at this cylinder.Plastic bearing plate 300 is made of less than the plectane of these cylinder engaging bump 205 internal diameters cylindrical part 203 external diameters, the external diameter of internal diameter greater than this lower case 200.This bearing plate 300 is configured between this upper and lower part housing 100,200, the cylindrical part 203 of this lower case 200 is configured in the circular hole that inner peripheral surface limited 301 by this bearing plate 300, the slip underneath of this discoideus planar surface portion 102 of top and this upper body 100 of bearing plate 300 contacts, the top sliding contact of the discoideus planar surface portion 202 of following and this lower case 200 of bearing plate 300.And, this upper body 100 by engaging hook portion 104 elasticity and being installed on the engagement portion 206 of this lower case 200 and with lower case 200 combinations.
The above and below of plastic bearing plate 300 have the annular recess 302 that forms around this circular hole 301 and a square end portion at these annular recess 302 openings and the opposing party end in a plurality of (this example is 6) radial groove 303 of the outer circumferential face opening of this bearing plate 300.This radial groove 303 along the circumferential direction is formed at the above and below of this bearing plate 300 with 30 ° phase difference.This annular recess 302 and radial groove 303 become the portion that accumulates of oiling agents such as butter.
In the synthetic resin thrust bearing 1 of said structure, upper body 100 and lower case 200 at least one sides are by containing the polystyrene thermoplastic elastomer of quantitative ratio to some extent, and the polyacetal resin that has added olefin copolymer and functional group in this polystyrene thermoplastic elastomer constitutes, specifically, by polyacetal resin 100 weight portions, ethylene-propylene-olefinic rubber 30～70 weight %, the vinylacetic acid salt content is constituted by copolymer 1～olefin copolymer 0.3～10 weight portion that 25 weight % are constituted and polystyrene thermoplastic elastomer 0.1～10 weight portion that has added functional group of the alkene-1 of vinyl-vinyl acetate copolymers 29～70 weight % of 18～40 weight % and ethene and carbon number 4～6.
Above-mentioned polyacetal resin is particularly with the synthetic resin of of the same race or xenogenesis during as subject material, and sliding properties such as friction ractor, wear resistance are good.Even synthetic resin thrust bearing 1 causes this position generation sliding friction because of the elastic mounting part that is subjected to radial load engage 206 of the engagement portions of bump 205 with the cylinder of lower case in the engaging hook portion 104 of the cylinder of upper body 100 engaging dip portion 103 produces interference, also this radial load can be born sleekly, stridulation can be do not produced.
Below, hold (upper body) by the polyacetal resin that will form by mentioned component as the revolution square shaft, and the synthetic resin that will hold identical or different kind with the revolution square shaft is with the square bar material (lower case) that fixes, test and have or not stridulation.
(the revolution square shaft holds A)
With ethylene contents be 70 weight % be that ethylene-propylene-olefinic rubber 45 weight portions, the vinylacetate amount of alkene composition is that vinyl-vinyl acetate copolymers 45 weight portions of 28 weight % and copolymer 10 weight portion of low density polyethylene and hexane-1 drop in the screw type extrusion press with the dicyclopentadiene; after mixing reaction of fusing under 200 ℃ of temperature, make granular olefin copolymer.
With respect to polyacetal resin 100 weight portions, styrene series elastomer 1 weight portion that adds above-mentioned olefin copolymer 1 weight portion and be added with anhydrous maleic acid as functional group stirs the back and obtains mixture in homogenizer.This mixture is dropped in the twin shaft curved shaft type extrusion press, after fusing is mixing, make granular moulding material.Adopt the screw type injection machine with this moulding material injection moulding, make the cylindrical bearing of internal diameter 20mm, external diameter 25.6mm, length 10mm, it is held A as the revolution square shaft.
(the revolution square shaft holds B)
With respect to polyacetal resin 100 weight portions, add above-mentioned olefin copolymer 1 weight portion, added styrene series elastomer 1 weight portion of anhydrous maleic acid and as mobile paraffin 1 weight portion of oiling agent as functional group, with method injection moulding same as described above, make the cylindrical bearing of internal diameter 20mm, external diameter 25.6mm, length 10mm, it is held B as the revolution square shaft.
(the revolution square shaft holds C)
Will be as the oil-containing polyacetal resin that contains mineral oil 3 weight % of lubricating oils as moulding material, use the screw type injection machine, with this moulding material injection moulding, make the cylindrical bearing of internal diameter 20mm, external diameter 25.6mm, length 10mm, it is held C as the revolution square shaft.
(fixedly the square bar material a)
Use and to hold the identical moulding material of A with described revolution square shaft, making the length of side is the square plate of 30mm, thickness 3mm, with it as fixing square bar material a.
(fixedly square bar material b)
Use and to hold the identical moulding material of B with described revolution square shaft, making the length of side is the square plate of 30mm, thickness 3mm, with it as fixing square bar material b.
(fixedly square bar material c)
Use and to hold the identical moulding material of c with described revolution square shaft, making the length of side is the square plate of 30mm, thickness 3mm, with it as fixing square bar material c.
Above-mentioned revolution square shaft held and fixedly the square bar material respectively by: (1) revolution square shaft hold A and fixedly square bar material a, (2) revolution square shaft hold A and fixedly square bar material c, (3) revolution square shaft hold B and fixedly square bar material b, (4) turn round square shaft and hold C and the fixedly combination of square bar material c, under the test conditions shown in the table 1, test its sliding properties and have or not stridulation.Its test result sees table 2 and table 3 for details.
Table 1
(test conditions)
Thrust load: face is pressed 5kgf/cm
2, later per 10 minutes accumulative total load 5kgf/cm
2
Speed: 0.5m/min
Environment temperature: room temperature (25 ℃)
Lubricating condition: unlubricated
Table 2
| Face is pressed | Combination (1) | Face is pressed | Combination (2) | ||
| Friction ractor | Stridulation | Friction ractor | Stridulation | ||
| 5 | 0.09～0.20 | Do not have | 5 | 0.11～0.20 | Do not have |
| 10 | 0.13～0.20 | Do not have | 10 | 0.14～0.21 | Especially |
| 15 | 0.14～0.20 | Do not have | 15 | 0.16～0.22 | Do not have |
| 20 | 0.1 6～0.19 | Do not have | 20 | 0.17～0.21 | Do not have |
| 25 | 0.1 5～0.18 | Do not have | 25 | 0.19～0.22 | Do not have |
| 30 | 0.1 5～0.18 | Do not have | 30 | 0.17～0.19 | Do not have |
| 35 | 0.15～0.18 | Do not have | 35 | 0.17～0.20 | Do not have |
| 40 | 0.15～0.18 | Do not have | 40 | 0.17～0.18 | Do not have |
| 45 | 0.16～0.18 | Do not have | 45 | 0.17～0.19 | Do not have |
| 50 | 0.16·0.19 | Do not have | 50 | 0.16～0.19 | Do not have |
In combinations thereof (1), face is pressed 50kg/fcm
2It is 8 μ m that revolution square shaft after the load holds wear extent, and fixedly the wear extent of square bar material is 10 μ m, and in combination (2), face is pressed 50kgf/cm
2It is 7 μ m that revolution square shaft after the load holds wear extent, and fixedly square bar grinding abrasion amount is 9 μ m.
Table 3
| Face is pressed | Combination (3) | Face is pressed | Combination (4) | ||
| Friction ractor | Stridulation | Friction ractor | Stridulation | ||
| 5 | 0.08～0.13 | Do not have | 5 | 0.09～0.14 | Do not have |
| 10 | 0.09～0.14 | Do not have | 10 | 0.10～0.16 | Do not have |
| 15 | 0.11～0.15 | Do not have | 15 | 0.11～0.15 | Do not have |
| 20 | 0.12～0.17 | Do not have | 20 | 0.13～0.15 | Have |
| 25 | 0.12～0.17 | Do not have | 25 | 0.14～0.17 | Have |
| 30 | 0.12～0.17 | Do not have | 30 | 0.14～0.19 | Have |
| 35 | 0.13～0.18 | Do not have | 35 | - | - |
| 40 | 0.13～0.18 | Do not have | 40 | - | - |
| 45 | 0.13～0.18 | Do not have | 45 | - | - |
| 50 | 0.13～0.18 | Do not have | 50 | - | - |
In combinations thereof (3), the face that applies is pressed 50kg/fcm
2The wear extent that revolution square shaft after the load holds is 6 μ m, and fixedly the wear extent of square bar material is 8 μ m, and in combination (4), the face that applies is pressed 20kgf/cm
2Produce stridulation after the load, then, until the face that applied is pressed 30kg/fcm
2Load till, stridulation does not disappear yet, so press 30kg/fcm at arrival face
2In time, end to test.
From above-mentioned test result as can be seen, because on being somebody's turn to do, at least one side of lower case forms by containing the polyacetal resin that has added olefin copolymer and functional group in a certain proportion of polystyrene thermoplastic elastomer and this polystyrene thermoplastic elastomer, therefore, produce at the engaging hook portion 104 of the cylinder of upper body 100 engaging dip portion 103 engage 206 of the engagement portions of bump 205 with the cylinder of lower case 200 elastic mounting part even synthetic resin thrust bearing 1 is subjected to the effect of radial load and to disturb and, also can not produce the stridulation that causes because of sliding friction owing to bearing this radial load sleekly at this position generation sliding friction.
The bearing plate 300 that is configured in 100,200 of upper and lower part housings is that the polyethylene resin that the ultra-high molecular weight polyethylene of 10～40dl/g and low molecular weight to High molecular weight polyethylene that limiting viscosity is 0.1～5dl/g are formed constitutes by limiting viscosity, and ultra-high molecular weight polyethylene is made of relative ultra-high molecular weight polyethylene and low molecular weight have 15～40 weight % to the High molecular weight polyethylene gross weight polyethylene resin.
The bearing plate 300 that is formed by above-mentioned polyethylene resin is configured between the upper and lower part housing 100,200 that is combined to form by synthetic resin, can bring into play good friction characteristics when synthetic resin rubs mutually, when between this upper and lower part housing 100,200 and bearing plate 300, sliding, can not produce crawl, can slide sleekly, can not produce the stridulation that causes because of this crawl.
Fig. 3 represents the synthetic resin thrust bearing 1 of this example the 2nd example.This synthetic resin thrust bearing 1 is on the basis of synthetic resin thrust bearing 1 structure of aforementioned the 1st example, forms the cylindrical part 207 identical with this through hole 201 internal diameters below the discoideus planar surface portion 202 of lower case 200
Fig. 4 represents the synthetic resin thrust bearing 1 of this example the 3rd example.Synthetic resin thrust bearing 1 comprises: plastic upper body 100, plastic lower case 200 and the synthetic resin system bearing plate 300 that is configured in 100,200 of this upper and lower part housings.Upper body 1001 comprises: central part has the discoideus planar surface portion 102 of circular hole 101, from these circular hole 101 peripheral radius vectors to foreign side separate decide at interval and below discoideus planar surface portion 102 integrally formed cylinder dip portion 105, for with this cylinder dip portion 105 cooperate form annular slots 106 and radius vector to foreign side and this cylinder dip portion 105 separate decide the interval and engage dip portion 103 at the integrally formed cylinder in the outer periphery of this discoideus planar surface portion 102, and the clamping hooked 104 that engages the end inner peripheral surface formation of dip portion 103 at this cylinder.Lower case 200 comprises: central part has and the circular hole 101 of the described upper body 100 discoideus planar surface portion 202 with the through holes 201 in footpath, in these integrally formed and the cylindrical part 203 of this through hole 201 above discoideus planar surface portion 202 with the footpath, radius vector to foreign side and this cylindrical part 203 separate decide at interval and this above discoideus planar surface portion 202 integrally formed and with cooperate the cylinder bump 208 that forms annular recessed portion 204 above this cylindrical part 203 and the discoideus planar surface portion 202, for with this cylinder bump 208 cooperate form annular slots 209 and radius vector to foreign side and this cylinder bump 208 separate decide the interval and engage bump 205 at the integrally formed cylinder in the outer periphery of this discoideus planar surface portion 202, and the engagement portion 206 that engages the lower end outer circumferential face formation of bump 205 at this cylinder.Plastic bearing plate 300 is made of less than the plectane of the internal diameter of this cylinder bump 208 external diameter, the external diameter of internal diameter greater than this cylindrical part 203.Between these bearing plate 300 these upper and lower part housings 100,200 of configuration, formation is configured in this cylindrical part 203 in the circular hole 301 that is limited by inner circumferential surface, the slip underneath of the discoideus planar surface portion 102 of top and this upper body 100 of bearing plate 300 contacts, the slip underneath state of contact of the cylindric planar surface portion 202 of following and this lower case 200 of bearing plate 300.And, this upper body 100 by with the outer circumferential face of cylinder dip portion 105 and the cylinder bump 208 of this bottom 200 radially overlapping and will engage hook portion 104 elasticity be installed in this lower case 200 engagement portion 206 and with lower case 200 combinations.In addition, this routine bearing plate 300 also the 1st example with shown in Figure 1 is the same, has annular recess 302 and radial groove 303.
In the synthetic resin thrust bearing 1 of above-mentioned the 3rd example, since this upper body 100 by with the outer circumferential face of cylinder dip portion 105 and the cylinder bump 208 of this bottom 200 radially overlapping and will engage hook portion 104 elasticity and be installed in the engagement portion 206 of this lower case 200 and make up with lower case 200, therefore, at overlapping of 208 of cylinder dip portion 105 and cylinder bumps with engage hook portion 104 and the elastic mounting part of 206 of engagement portions forms sealed department because of the labyrinth effect, so can prevent between the intrusion upper and lower part housing 100,200 such as dust.
On the synthetic resin thrust bearing 1 of the 3rd example, lower case 100, the 200th, use the synthetic resin identical to combine with above-mentioned the 1st example, this kind synthetic resin especially can be brought into play good friction characteristics when rubbing mutually, therefore, produce at the engaging hook portion 104 that overlapping of 208 of the cylinder bumps of the cylinder dip portion 105 of upper body 100 and lower case 200 and cylinder engage dip portion 103 engages 206 of the engagement portions of bump 205 with cylinder elastic mounting part even this synthetic resin thrust bearing 1 is subjected to the effect of radial load and to disturb and cause this position to produce sliding friction, also can bear this radial load sleekly, can be at overlapping and elastic mounting part generation stridulation.
Again, the bearing plate 300 of the 3rd example that forms with the polyethylene resin identical with above-mentioned the 1st example is owing to can bring into play when being configured in friction mutually between the upper and lower part housing 100,200 that the synthetic resin of good friction characteristics is combined into, therefore, when between this upper and lower part housing 100,200 and bearing plate 300, sliding, can not produce crawl, can slide sleekly, can not produce the unusual stridulation that causes because of this crawl.
Fig. 5 represents the synthetic resin thrust bearing 1 of this example the 4th example.Synthetic resin thrust bearing 1 comprises: plastic upper body 100, plastic lower case 200 and the plastic bearing plate 300 that is configured in 100,200 of this upper and lower part housings.Upper body 100 comprises: central part has the discoideus planar surface portion 102 of circular hole 101, integrally formed and the 1st cylinder dip portion 107 of this circular hole 101 below discoideus planar surface portion 102 with the footpath, radius vector to the outer circumferential face of foreign side and the 1st cylinder dip portion 107 separate decide at interval and below this discoideus planar surface portion 102 integrally formed the 2nd cylinder dip portion 105, for with the 2nd cylinder dip portion 105 cooperate form annular slots 106 and radius vector to foreign side and the 2nd cylinder dip portion 105 separate decide the interval and engage dip portion 103 at the integrally formed cylinder in the outer periphery of this discoideus planar surface portion 102, and the engaging hook portion 104 that engages the end inner peripheral surface formation of dip portion 103 at this cylinder.Lower case 200 comprises: central part has and the circular hole 101 of the described upper body 100 discoideus planar surface portion 202 with the through holes 201 in footpath, pass through this through hole 201 and ring-type shoulder 210 and the 1st integrally formed cylinder bump 211, radius vector to foreign side and the 1st cylinder bump 211 separate decide at interval and this above discoideus planar surface portion 202 integrally formed and with cooperate the 2nd cylinder bump 212 that forms annular recessed portion 204 above the 1st cylinder bump 211 and the plectane planar surface portion 202, in order to form annular slot 209 with the top cooperation of the 2nd cylinder bump 212 and discoideus planar surface portion 202 radius vector to foreign side and the outer circumferential face of the 2nd cylinder bump 212 separate decide the interval and engage bump 205 at the integrally formed cylinder in the outer periphery of this discoideus planar surface portion 202, and the engagement portion 206 that engages the lower end outer circumferential face formation of bump 205 at this cylinder.Bearing plate 300 is made of less than the plectane of the internal diameter of the 2nd cylinder bump 212 external diameter, the external diameter of internal diameter greater than the 1st cylinder bump 211 of this lower case 200, and be configured between this upper and lower part housing 100,200, form that the 1st cylinder bump 211 is configured in the circular hole 301 that the inner peripheral surface by bearing plate 300 limits, the slip underneath of the circular-arc planar surface portion 102 of top and this upper body 100 of bearing plate 300 contacts, the state of the top sliding contact of the discoideus planar surface portion 202 of following and this lower case 200 of bearing plate 300.And, this upper body 100 be by with the inner peripheral surface of the outer circumferential face of the 1st cylinder dip portion 107 and the 1st cylinder bump 211 of lower case 200 radially overlapping, with the outer circumferential face of the 2nd cylinder dip portion 105 and the 2nd cylinder bump 212 of this lower case 200 radially overlapping, and will engage hook portion 104 and flexibly be installed on the engagement portion 206 of this lower case 200 and make up with lower case 200.
In the synthetic resin thrust bearing 1 of above-mentioned the 4th example, since upper body 100 be by with the inner peripheral surface of the 1st cylinder bump 211 of the outer circumferential face of the 1st cylinder dip portion 107 and lower case 200 radially overlapping, with the outer circumferential face of the 2nd cylinder dip portion 105 and the 2nd cylinder bump 212 of this lower case 200 radially overlapping, and will engage that hook portion 104 flexibly is installed on the engagement portion 206 of this lower case 200 and with lower case 200 combinations, therefore, on the inner peripheral surface of this synthetic resin thrust bearing 1, overlapping 211 of the 1st cylinder bumps of the 1st cylinder dip portion 107 and lower case 200 is utilized the labyrinth effect to form sealed department, on the outer circumferential face of synthetic resin thrust bearing 1, at overlapping of 212 of the 2nd cylinder bumps of the 2nd cylinder dip portion 105 and this lower case 200 and engage hook portion 104 and the elastic mounting part of 206 of engagement portions utilizes the labyrinth effect to form sealed department, can prevent that therefore dust etc. from invading, lower case 100, between 200.
On the synthetic resin thrust bearing 1 of the 4th example, lower case 100,200 owing to be to use the synthetic resin identical with aforementioned the 1st example to combine, this synthetic resin especially can be brought into play good friction characteristics when rubbing mutually, therefore, even this synthetic resin thrust bearing 1 be subjected to radial load effect and in the overlapping portion of 211 of the 1st bumps of the 1st cylinder dip portion 107 of upper body 100 and lower case 200, the elastic mounting part that overlapping of 212 of the 2nd cylinder bumps of the 2nd cylinder dip portion 105 and this lower case 200 and cylinder engage 206 of the engagement portions of the engaging hook portion 104 of dip portion 103 and ring-type bump 205 produces and disturbs and cause this position to produce sliding friction, also can slyness bear this radial load, can be at overlapping and elastic mounting part generation stridulation.
Again, owing to can bring into play when using the bearing plate 300 of the 4th example that the polyethylene resin identical with above-mentioned the 1st example form to be configured between the upper and lower part housing 100,200 that the above-mentioned synthetic resin of good friction characteristics is combined to form by mutual friction, therefore, when between this upper and lower part housing 100,200 and bearing plate 300, sliding, can not produce crawl, can slide sleekly, can not produce the unusual stridulation that causes because of this crawl.
Fig. 6 represents the synthetic resin thrust bearing 1 of the 5th example of this example.Synthetic resin thrust bearing 1 comprises: plastic upper body 100, plastic lower case 200 and be configured in plastic bearing plate 300 between this upper and lower part housing 100,200.Upper body 100 comprises: central part has the discoideus planar surface portion 102 of circular hole 101, the integrally formed 1st cylinder dip portion 107 identical below discoideus planar surface portion 102 with these circular hole 101 internal diameters, radius vector to foreign side and the 1st cylinder dip portion 107 separate decide at interval and integrally formed and cooperate the 2nd cylinder dip portion 109 that forms annular slot 108 with the outer circumferential face of the 1st cylinder dip portion 107 below discoideus planar surface portion 102, radius vector to foreign side and the 2nd cylinder dip portion 109 separate decide at interval and integrally formed and below the 2nd cylinder dip portion 109 and discoideus planar surface portion 102, cooperate the 3rd cylinder dip portion 105 that forms wide cut annular recess 110 below discoideus planar surface portion 102, for with the 3rd cylinder dip portion 105 cooperate form annular slots 106 and radius vector to foreign side and the 3rd cylinder dip portion 105 separate decide the interval and engage dip portion 103 at the integrally formed cylinder in the outer periphery of discoideus planar surface portion 102, and the engaging hook portion 104 that engages the end inner peripheral surface formation of dip portion 1 03 at this cylinder.Lower case 200 comprises: central part has and the circular hole 101 of the described upper body 100 discoideus planar surface portion 202 with the through holes 201 in footpath, through this through hole 201 and ring-type shoulder 210 integrally formed the 1st cylinder bump 211 on discoideus planar surface portion 202, radius vector to foreign side and the 1st cylinder bump 211 separate decide at interval and integrally formed and cooperate the 2nd cylinder bump 214 that forms annular slot 213 with the 1st cylinder bump 211 above the discoideus planar surface portion 202 at this, this above discoideus planar surface portion 202 radius vector to foreign side and this 2 cylinder bump 214 separate decide integrally formed at interval and with cooperate the 3rd cylinder bump 212 that forms annular recess 204 above the 2nd cylinder bump 214 and the discoideus planar surface portion 202, for with the 3rd cylinder bump 212 cooperate form annular slots 209 and radius vector to foreign side and the 3rd cylinder bump 212 separate decide the interval and engage bump 205 at the integrally formed cylinder in the outer periphery of this discoideus planar surface portion 202, and the engagement portion 206 that engages the lower end outer circumferential face formation of bump 205 at this cylinder.Bearing plate 300 is by the external diameter of internal diameter greater than the 2nd cylinder bump 212 of this lower case 200, external diameter constitutes less than the plectane of the 3rd cylinder bump 214 internal diameters of this lower case 200, and be configured on this, lower case 100, between 200, formation is with the 1st of this lower case 200 the, the 2nd cylinder bump 211, in the circular hole 301 that 214 configurations are limited by the inner peripheral surface of bearing plate 300, the slip underneath of the discoideus planar surface portion 102 of top and this upper body 100 of bearing plate 300 contacts, the state of the top sliding contact of the discoideus planar surface portion 202 of following and this lower case 200 of bearing plate 300, and, this upper body 100 be by with the 1st and the 2nd cylinder dip portion 107 and 109 separately the end and the end of the 1st and the 2nd cylinder bump 211 of this lower case 200 and 214 radially overlapping, with the end of the 3rd cylinder bump 212 of the end of the 3rd cylinder dip portion 105 and this lower case 200 radially overlapping, and the engaging hook portion 104 of this cylinder engaging dip portion 103 flexibly is installed on the engagement portion 206 of cylinder engaging bump 205 of this lower case 200 and with lower case 200 combinations.
In the synthetic resin thrust bearing 1 of above-mentioned the 5th example, because upper body 100 is by with the 1st, the 2nd, the 3rd cylinder dip portion 107,109,105 separately the end respectively with the 1st of lower case 200, the 2nd, the 3rd cylinder bump 211,214,212 end radially overlapping and will engage that hook portion 104 flexibly is installed on the engagement portion 206 and with lower case 200 combinations, therefore, inner peripheral surface side at this synthetic resin thrust bearing 1, the 1st, the 2nd cylinder dip portion 107,109 with lower case 200 the 1st, the 2nd cylinder bump 212, overlapping of 214 is utilized the labyrinth effect to form sealed department, outer circumferential side at synthetic resin thrust bearing 1, at overlapping of 212 of the 3rd cylinder bumps of the 3rd cylinder dip portion 105 and lower case 200 and engage hook portion 104 and the elastic mounting part of 206 of engagement portions utilizes the labyrinth effect to form sealed department, so can prevent in the intrusion such as dust, lower case 100, between 200.
On the 5th example, lower case 100,200 is the same with aforementioned the 1st example, be to combine by the synthetic resin that when synthetic resin rubs each other, especially can bring into play good friction characteristics, even this synthetic resin thrust bearing 1 be subjected to radial load effect and in the overlapping portion of 211 of the 1st cylinder bumps of the 1st cylinder dip portion 107 of above-mentioned housing 100 and lower case 200, the overlapping portion that the 2nd cylinder bump of the 2nd cylinder dip portion 109 and this lower case 200 is 214, the engaging hook portion 104 that overlapping of 212 of the 3rd cylinder bumps of the 3rd cylinder dip portion 105 and this lower case 200 and cylinder engage dip portion 103 engages 206 of the engagement portions of bump 205 with cylinder elastic mounting part produces and disturbs and cause this position to produce sliding friction, also can slyness bear this radial load, can be at overlapping and elastic mounting part generation stridulation.
Again owing to can bring into play when using the bearing plate 300 of the 5th example that the polyethylene resin identical with aforementioned the 1st example constitute to be configured between the upper and lower part housing 100,200 that the synthetic resin of good friction characteristics combines by mutual friction, therefore, when between this top and the bottom housing 100,200 and bearing plate 300, sliding, can not produce crawl, can slide sleekly, can not produce the unusual stridulation that causes because of this crawl.
In addition, also can be on the architecture basics of the synthetic resin thrust bearing 1 of aforementioned the 3rd, the 4th and the 5th example, the same with the synthetic resin thrust bearing 1 of the 2nd example, the integrally formed cylindrical part 207 identical below the discoideus planar surface portion 202 of lower case 200 with these through hole 201 internal diameters.
Adopt the present invention, because it is last, at least one side of lower case is by containing a certain proportion of polystyrene thermoplastic elastomer, and the polyacetal resin that this polystyrene thermoplastic elastomer has added olefin copolymer and functional group forms, and be configured on this, bearing plate between lower case is that the ultra-high molecular weight polyethylene of 10～40dl/g and polyethylene resin that limiting viscosity is formed by low molecular weight to the High molecular weight polyethylene of 0.1～5dl/g are constituted by limiting viscosity, so last, when sliding between lower case and the bearing plate, can not wriggle by generating material, can slide sleekly, can not cause unusual stridulation because of this crawl.In addition, even synthetic resin thrust bearing causes this position to produce sliding friction because of the effect that is subjected to radial load produces to disturb at the elastic mounting part of upper and lower part housing or upper and lower part housing overlapping and elastic mounting part, also can bear this radial load sleekly, can be at overlapping and elastic mounting part generation stridulation.
Claims (12)
1. synthetic resin thrust bearing, possesses plastic upper body, plastic lower case and being configured on this, synthetic resin system bearing plate between lower case, this upper body is by on the outer periphery that its outer periphery flexibly is installed in lower case and be combined into synthetic resin thrust bearing with this lower case, it is characterized in that, on being somebody's turn to do, at least one side of lower case forms by containing the polyacetal resin that has added olefin copolymer and functional group in a certain proportion of polystyrene thermoplastic elastomer and this polystyrene thermoplastic elastomer, olefin copolymer is by ethylene-propylene-olefinic rubber 30～70 weight %, the vinylacetic acid salt content is constituted by the copolymer 1～25 weight % of the alkene-1 of vinyl-vinyl acetate copolymers 29～70 weight % of 18～40 weight % and ethene and carbon number 4～6, polyacetal resin is by polyacetal resin 100 weight portions, olefin copolymer 0.3～10 weight portion and polystyrene thermoplastic elastomer 0.1～1.0 weight portion that has added functional group constitute, and this bearing plate is that the polyethylene resin that the ultra-high molecular weight polyethylene of 10～40dl/g and low molecular weight to High molecular weight polyethylene that limiting viscosity is 0.1～5dl/g are formed constitutes by limiting viscosity.
2. synthetic resin thrust bearing according to claim 1, its feature in, polyacetal resin also contains the lubricating oils of 0.1～10 weight portion ratio with respect to polyacetal resin 100 weight portions.
3. synthetic resin thrust bearing according to claim 1 and 2, it is characterized in that, in the polyethylene resin of being made up of ultra-high molecular weight polyethylene and low molecular weight to High molecular weight polyethylene, the content ratio of ultra-high molecular weight polyethylene accounts for ultra-high molecular weight polyethylene and low molecular weight 15～40 weight % to the gross weight of High molecular weight polyethylene.
4. synthetic resin thrust bearing according to claim 1 and 2, it is characterized in that, plastic upper body comprises: central part has the discoideus planar surface portion of circular hole, the engaging hook portion that integrally formed cylinder engages dip portion and engages the end inner peripheral surface formation of dip portion at this cylinder in the outer periphery of this discoideus planar surface portion, plastic lower case comprises: central part has and the circular hole of the described upper body discoideus planar surface portion with the through hole in footpath, the cylindrical part identical that forms above the cylindric planar surface portion at this with this through hole internal diameter, radius vector to foreign side and this cylindrical part separate decide to engage bump at the integrally formed cylinder in the outer periphery of this discoideus planar surface portion at interval, and in the engagement portion that the lower end outer circumferential face of this cylinder engaging bump forms, this upper body will be by engaging hook portion elasticity and be installed in the engagement portion of this lower case and making up with lower case.
5. synthetic resin thrust bearing according to claim 4, it is characterized in that, plastic bearing plate is made of greater than this cylindrical part external diameter, external diameter plectane less than this cylinder engaging bump internal diameter internal diameter, and with the slip underneath of the discoideus planar surface portion of top and this upper body of this plectane contact, the state configuration of the top sliding contact of the discoideus planar surface portion of following and this lower case of this plectane is between this upper and lower part housing.
6. synthetic resin thrust bearing according to claim 1 and 2, it is characterized in that, plastic upper body comprises: central part has the discoideus planar surface portion of circular hole, separate the cylinder dip portion that institute decide the interval setting from this circular hole periphery radius vector to foreign side, radius vector to foreign side and this cylinder dip portion separate decide to engage dip portion at the integrally formed cylinder in the outer periphery of this planar surface portion at interval, engaging hook portion in the inner peripheral surface formation of the end of this cylinder engaging dip portion, plastic lower case comprises: central part has and the circular hole of the described upper body discoideus planar surface portion with the through hole in footpath, the cylindrical part identical that forms above the discoideus planar surface portion at this with this through hole internal diameter, radius vector to foreign side and this cylindrical part separate decide at interval and at this cylinder bump integrally formed above discoideus planar surface portion, radius vector to foreign side and this cylinder bump separate decide to engage bump at the integrally formed cylinder in the outer periphery of this discoideus planar surface portion at interval, and in the engagement portion that the lower end outer circumferential face of this cylinder engaging bump forms, this upper body by with the cylinder bump of cylinder dip portion and this lower case radially overlapping and will engage hook portion elasticity and be installed on the engagement portion of this lower case and make up with lower case.
7. synthetic resin thrust bearing according to claim 6, it is characterized in that, plastic bearing plate is made of less than the plectane of this cylinder bump internal diameter greater than this cylindrical part external diameter, external diameter internal diameter, with the slip underneath of the discoideus planar surface portion of top and this upper body of this plectane contact, the state configuration of the top sliding contact of the discoideus planar surface portion of following and this lower case of this plectane is between this upper and lower part housing.
8. synthetic resin thrust bearing according to claim 1 and 2, it is characterized in that, plastic upper body comprises: central part has the discoideus planar surface portion of circular hole, be located on this circular hole periphery and the 1st cylinder dip portion identical with this circular hole internal diameter, to the outer circumferential face of radially foreign side and the 1st cylinder dip portion separate decide to be located at interval this discoideus planar surface portion below the 2nd cylinder dip portion, radius vector to foreign side and the 2nd cylinder dip portion separate decide to engage dip portion at the integrally formed cylinder in the outer periphery of this planar surface portion at interval, the engaging hook portion that the end inner peripheral surface of vertical component effect forms under this cylinder engaging, plastic lower case comprises: central part has and the circular hole of the described upper body discoideus planar surface portion with the through hole in footpath, at this this through hole of process and ring-type shoulder and the 1st integrally formed cylinder bump above discoideus planar surface portion, this above discoideus planar surface portion radius vector to foreign side and the 1st cylinder bump separate decide at interval and the 2nd integrally formed cylinder bump, radius vector to foreign side and the 2nd cylinder bump separate decide to engage bump at the integrally formed cylinder in the outer periphery of this discoideus planar surface portion at interval, the engagement portion that the lower end outer circumferential face that protrudes in the engaging of this cylinder forms, this upper body by with the 1st cylinder bump of the 1st cylinder dip portion and this lower case radially overlapping, with the 2nd cylinder bump of the 2nd cylinder dip portion and this lower case radially overlapping, and will engage hook portion elasticity and be installed on the engagement portion of this lower case and make up with lower case.
9. synthetic resin thrust bearing according to claim 8, it is characterized in that, plastic bearing plate is made of less than the plectane of the 2nd cylinder bump internal diameter greater than the 1st cylinder bump external diameter, external diameter internal diameter, slip underneath with the discoideus planar surface portion of top and this upper body of this plectane contacts, the state configuration of the top sliding contact of the discoideus planar surface portion of following and this lower case of this plectane is between this upper and lower part housing
10. synthetic resin thrust bearing according to claim 1 and 2, it is characterized in that, plastic upper body comprises: central part has the discoideus planar surface portion of circular hole, integrally formed and identical the 1st cylinder dip portion below discoideus planar surface portion with this circular hole internal diameter, radius vector to foreign side and the 1st cylinder dip portion separate decide at interval and below discoideus planar surface portion integrally formed the 2nd cylinder dip portion, radius vector to foreign side and the 2nd cylinder dip portion separate decide at interval and below discoideus planar surface portion integrally formed the 3rd cylinder dip portion, radius vector to foreign side and the 3rd cylinder dip portion separate decide to engage dip portion at the integrally formed cylinder in the outer periphery of discoideus planar surface portion at interval, engaging hook portion in the inner peripheral surface formation of the end of this cylinder engaging dip portion, plastic lower case comprises: central part has and the circular hole of the described upper body discoideus planar surface portion with the through hole in footpath, at this this through hole of process and ring-type shoulder and the 1st integrally formed cylinder bump above discoideus planar surface portion, radius vector to foreign side and the 1st cylinder bump separate decide at interval and at this 2nd integrally formed above discoideus planar surface portion cylinder bump, radius vector to foreign side and the 2nd cylinder bump separate decide at interval and at this 3rd integrally formed above discoideus planar surface portion cylinder bump, radius vector to foreign side and the 3rd cylinder bump separate decide to engage bump at the integrally formed cylinder in the outer periphery of this discoideus planar surface portion at interval, and in the engagement portion that the lower end outer circumferential face of this cylinder engaging bump forms, this upper body by with the 1st cylinder dip portion and the 2nd cylinder dip portion separately with the 1st cylinder bump of this lower case and the 2nd cylinder bump radially overlapping, with the 3rd cylinder bump of the 3rd cylinder dip portion and this lower case radially overlapping, and the engaging hook portion elasticity of this cylinder engaging dip portion is installed in this lower case cylinder engaging bump the engagement portion and make up with lower case.
11. synthetic resin thrust bearing according to claim 10, it is characterized in that, plastic bearing plate is made of less than the plectane of the 3rd cylinder bump internal diameter greater than the 2nd cylinder bump external diameter, external diameter internal diameter, with the slip underneath of the discoideus planar surface portion of top and this upper body of this plectane contact, the state configuration of the top sliding contact of the discoideus planar surface portion of following and this lower case of this plectane is between this upper and lower part housing.
12. synthetic resin thrust bearing according to claim 4 is characterized in that, this lower case has the integrally formed in its lower section cylindrical part identical with this through hole internal diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01121076 CN1258046C (en) | 2001-06-14 | 2001-06-14 | Synthetic resin thrust bearing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01121076 CN1258046C (en) | 2001-06-14 | 2001-06-14 | Synthetic resin thrust bearing |
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| Publication Number | Publication Date |
|---|---|
| CN1392350A CN1392350A (en) | 2003-01-22 |
| CN1258046C true CN1258046C (en) | 2006-05-31 |
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| CN 01121076 Expired - Fee Related CN1258046C (en) | 2001-06-14 | 2001-06-14 | Synthetic resin thrust bearing |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4378983B2 (en) * | 2003-03-25 | 2009-12-09 | オイレス工業株式会社 | Strut plain bearing |
| JP5233370B2 (en) * | 2008-04-02 | 2013-07-10 | オイレス工業株式会社 | Thrust sliding bearing |
| JP5309791B2 (en) | 2008-08-26 | 2013-10-09 | オイレス工業株式会社 | Synthetic plastic thrust plain bearing |
| JP5704625B2 (en) * | 2009-12-11 | 2015-04-22 | オイレス工業株式会社 | Synthetic plastic thrust plain bearing |
| JP5444270B2 (en) * | 2011-02-23 | 2014-03-19 | オイレス工業株式会社 | Thrust slide bearing made of synthetic resin |
| CN102797748A (en) * | 2012-08-15 | 2012-11-28 | 宁波三泰轴承有限公司 | Plane thrust bearing |
| DE102013201965A1 (en) * | 2013-02-07 | 2014-08-07 | Schaeffler Technologies Gmbh & Co. Kg | Strut mounts |
| JP6466708B2 (en) * | 2014-12-12 | 2019-02-06 | オイレス工業株式会社 | Thrust bearing for vehicles |
| JP2017089666A (en) * | 2015-11-02 | 2017-05-25 | オイレス工業株式会社 | Synthetic resin-made slide bearing |
-
2001
- 2001-06-14 CN CN 01121076 patent/CN1258046C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1392350A (en) | 2003-01-22 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060531 Termination date: 20190614 |