• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
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    • 专利摘要:
    sliding bearing made of synthetic resin this is a sliding bearing made of synthetic resin (1) which is provided with: an upper housing made of synthetic resin (2) which is attached to the vehicle through fixing members; a lower housing made of reinforced synthetic resin (3), which is stacked on the upper housing (2) so as to rotate freely with respect to the upper housing (2) around the axis center o in the circumferential direction (r); and a sliding bearing part made of synthetic resin (5) arranged in a space (4) between the upper housing (2) and the lower housing (3).
    公开号:BR112015024283B1
    申请号:R112015024283-9
    申请日:2014-03-05
    公开日:2022-01-18
    发明作者:Yoshikazu Sakairi；Robert Hamrodi；Kai METZLER；Yoshiteru Igarashi；Katsunori Saito
    申请人:Oiles Corporation；Oiles Deutschland Gmbh；
    IPC主号:
    专利说明:

    FIELD OF TECHNIQUE
    [0001] The present invention relates to a sliding bearing made of synthetic resin, and more particularly to a sliding bearing which is suitably incorporated as a sliding bearing of a strut type suspension (Macpherson type) in a motor vehicle. of four wheels. BACKGROUND OF THE TECHNIQUE
    [0002] In general, a stanchion-type suspension is primarily used for a front wheel of a four-wheel motor vehicle, and is arranged so that a stanchion assembly incorporating a hydraulic shock absorber in an external cylinder integrated with an axle main is combined with a coil suspension spring. Among such suspensions, there is a type of structure in which the geometric axis of the helical suspension spring is actively displaced in relation to the geometric axis of the strut, in order to allow the sliding of a piston rod of the damper incorporated in the strut to be performed smoothly, and there is another type of structure in which the axis of the helical suspension spring is arranged in alignment with the axis of the strut. In both structures, a slewing bearing, which uses balls or needles or a sliding member made of synthetic resin, is disposed between a mounting member for a motor vehicle body, and an upper spring seat member of the coil spring suspension. to allow the rotation to take place smoothly when the strut assembly rotates together with the helical suspension spring by the steering wheel steering operation. PRIOR ART DOCUMENTS PATENT DOCUMENTS
    [0003] [Patent Document 1] JP-A-2004-293589
    [0004] [Patent Document 2] JP-A-2009-250278
    [0005] Consequently, since the upper spring seat member, on which the bearing is arranged, is generally made of sheet metal and is therefore relatively heavy, and since the upper spring seat member is made of sheet metal metal needs to be coated with rust prevention, even if the sliding bearing made of synthetic resin is used instead of the expensive slewing bearing to acquire the light weight and low price of the motor vehicle chassis, there are limits to such attempts to the light weight and low price due to the weight, manufacturing cost, joining cost and the like of the upper spring seat member.
    [0006] In Patent Document 1, a sliding bearing is proposed which is provided with an upper housing made of synthetic resin which has a bearing surface from vehicle body side to vehicle body side and an annular lower surface ; a lower shell made of reinforced synthetic resin which contains reinforced fibers and is superimposed on the upper shell so as to be rotatable about the axis of the upper shell, and which has an annular upper surface opposite the annular lower surface of the upper shell; an annular thrust sliding bearing part made of synthetic resin and a tubular radial bearing part which are interposed between the annular lower surface and the annular upper surface; and a tubular radial bearing piece; wherein a spring bearing surface for a coil suspension spring is integrally formed in a lower housing portion on an outer peripheral side of the vehicle body side bearing surface and the thrust slide bearing part.
    [0007] Furthermore, in Patent Document 2, a thrust sliding bearing is proposed which is provided with an upper housing made of synthetic resin which has a bearing surface from vehicle body side to vehicle body side and an annular bottom surface; a lower housing made of reinforced synthetic resin which contains reinforced fibers and is superimposed on the upper housing so as to be rotatable about an axis of the upper housing, and wherein an annular upper surface opposite the annular lower surface and a spring bearing surface for a coil suspension spring are integrally formed; and a thrust sliding bearing part which is disposed in an annular gap between the annular lower surface and the annular upper surface and having an annular thrust sliding bearing surface which is slidably brought into contact with at least one of the lower surface annular and the annular top surface, wherein the vehicle body side bearing surface, the thrust sliding bearing surface and the spring bearing surface are arranged by being juxtaposed to each other in an axial direction.
    [0008] According to these sliding bearings, since the lower housing made of reinforced synthetic resin which contains reinforced fibers has the spring bearing surface for the helical suspension spring, it is possible to omit the upper spring seat member made of sheet metal so that it is possible to eliminate an increase in weight attributable to the upper spring seat member made of sheet metal and an increase in price attributable to such as the fabrication, coating and joining of the upper spring seat member made of sheet metal blade, which thereby makes it possible to acquire the light weight and low price of the motor vehicle chassis. SUMMARY OF THE INVENTIONPROBLEMS THAT THE INVENTION IS INTENDED TO SOLVE
    [0009] However, since the lower casing, which is the sliding coupling surface of the sliding bearing part, is formed of a reinforced synthetic resin that contains a reinforcing filler such as glass fibers, if a slip occurs between the part of sliding bearing made of synthetic resin and the lower housing, there may be a problem due to the fact that the thrust sliding bearing part is worn out by the lower housing, which thereby makes the durability and smoothness of the steering wheel steering operation decline.
    [0010] The present invention was conceived in view of the aspects described above, and the objective of the same is to provide a sliding bearing made of synthetic resin that has the ability to prevent sliding between the sliding bearing piece made of synthetic resin and the lower housing made of reinforced synthetic resin which contains a reinforcing filler such as glass fibers, which thereby makes it possible to maintain smooth steering wheel steering operation. MEANS TO SOLVE PROBLEMS
    [0011] A sliding bearing made of synthetic resin according to the present invention comprises: an upper housing made of synthetic resin, a lower housing made of reinforced synthetic resin superimposed on the upper housing so as to be rotatable about a geometric axis with respect to the upper housing, and a sliding bearing piece made of synthetic resin disposed between the upper housing and the lower housing, wherein the upper housing includes: an annular upper housing base portion; an inner cylindrical hanging portion having a first cylindrical outer peripheral surface continuously connected to an annular lower surface of the upper shell base portion and suspended from an inner edge portion of the lower annular surface of the upper shell base portion; a cylindrical engaging suspended portion which is suspended from an outer edge portion of the annular lower surface of the upper casing base portion and has a domed engagement portion on a lower portion of a first cylindrical inner peripheral surface continuously connected to the surface lower annular of the upper shell base portion; and an outer cylindrical suspended portion suspended from the annular lower surface of the upper casing base portion so as to form a first cylindrical recessed portion in cooperation with the cylindrical engaging suspended portion and the upper casing base portion, wherein the lower shell includes: an annular lower shell base portion; a corrugated entanglement portion that is formed with first projecting portions and indented portions and arranged alternately on an annular upper surface of the lower shell base portion along a circumferential direction about the axis; a cylindrical protuberance projecting from the annular upper surface of the lower housing base portion; and a cylindrical engaged protruding portion having a domed portion engaged with an upper portion of a second cylindrical outer peripheral surface and projecting from an outer edge portion of the annular upper surface of the lower shell base portion to form a second cylindrical recessed portion cooperating with the cylindrical protuberance and the lower housing base portion, and wherein the sliding bearing part includes: a thrust sliding bearing part portion having an annular bottom surface that is brought into contact with the annular top surface of the lower casing base portion and an annular top surface which is slidably brought into contact with the annular bottom surface of the upper casing base portion; a cylindrical radial sliding bearing part portion suspended from an inner edge portion of the annular bottom surface of the thrust sliding bearing part portion and having a second cylindrical inner peripheral surface which is slidably brought into contact with the first surface cylindrical outer peripheral of the first cylindrical suspended portion; and a corrugated entanglement portion which is formed with second projecting portions and indented portions alternately disposed on the annular bottom surface of the thrust sliding bearing piece portion along the circumferential direction about the axis, and which is entangled with the corrugated entanglement portion so that rotation about the axis with respect to the lower housing is prevented by the lower housing, wherein the upper housing is combined with the lower housing by arranging the protruding cylindrical engaged portion with the first cylindrical recessed portion, by arranging the portion external cylindrical suspension on the second cylindrical recessed portion, and through the resilient engagement of the domed engaging portion to the domed engaged portion.
    [0012] According to such a sliding bearing made of synthetic resin, since the sliding bearing part is integrated with the lower housing by being provided with a corrugated mesh portion which is formed with second projecting portions and indented portions arranged alternately on the surface lower annular portion of the thrust sliding bearing piece along the circumferential direction about the axis, and which is entangled with the corrugated entanglement portion so that rotation about the axis relative to the lower housing is prevented by the lower housing . Therefore, in rotation of the lower housing about the geometric axis with respect to the upper housing, the slip is confined to slipping between synthetic resins excellent in slip characteristics, i.e., between the annular upper surface of the thrust sliding bearing part portion and the annular bottom surface of the upper housing base portion and between the second cylindrical inner peripheral surface of the radially sliding bearing piece portion and the first cylindrical outer peripheral surface of the first cylindrical hanging portion of the upper housing.
    [0013] In the sliding bearing made of synthetic resin according to the present invention, the upper housing includes an inner cylindrical small drop-down portion suspended from an annular lower end face of the inner cylindrical drop-down portion and a drop-down outer cylindrical drop-down portion from an annular lower surface of the inner cylindrical hanging portion to form a third cylindrical recessed portion in cooperation with the inner cylindrical hanging portion and the inner cylindrical hanging portion, the lower housing includes a cylindrical hanging portion suspended from a cylindrical hanging portion. inner edge of the lower annular surface of the lower shell base portion, wherein a first annular protruding portion protrudes radially inwardly from a cylindrical inner peripheral surface of the cylindrical hanging portion, wherein a further cylindrical protuberance protrudes from a annular top surface of the first annular protruding portion to form a fourth cylindrical recessed portion in cooperation with the lower shell base portion and the first annular protruding portion, and wherein a second annular protruding portion protrudes radially inwardly from a lower edge portion of a cylindrical inner peripheral surface of the first annular raised portion, and the upper housing may be combined with the lower housing by arranging the other cylindrical protuberance of the lower housing in the third cylindrical recessed portion.
    [0014] According to such a sliding bearing made of synthetic resin, the upper housing is combined with the lower housing by arranging the cylindrical engaged protruding portion in the first cylindrical recessed portion, by arranging the outer cylindrical suspended portion in the second recessed portion cylindrical, and through resilient engagement of the domed engaging portion to the domed engaged portion; additionally, the upper housing is combined with the lower housing by arranging the other cylindrical protuberance of the lower housing in the third cylindrical recessed portion. Therefore, labyrinths are formed therein, with the result that dust and the like ingress into the sliding surfaces between the annular upper surface of the thrust sliding bearing part portion and the annular lower surface of the upper housing and between the second peripheral surface The cylindrical inner surface of the radially sliding bearing part portion and the first cylindrical outer peripheral surface of the first cylindrical hanging portion of the upper housing is prevented by such labyrinths, which thereby makes it possible to prevent as practically as possible a decline in characteristics sliding surfaces due to the ingress of dust and the like on these sliding surfaces.
    [0015] In the sliding bearing made of synthetic resin according to the present invention, the thrust sliding bearing part portion may have a plurality of inner recessed portions and outer recessed portions which are formed in an annular upper surface thereof along the circumferential direction about the geometric axis and in at least two rows that include an inner row and an outer row in the radial direction, in which case the inner recessed portions and the outer recessed portions may be arranged with phase differences with respect to each other in the circumferential direction about the axis, and the radial sliding bearing part portion may have a plurality of axial grooves which are formed in a second cylindrical inner peripheral surface thereof such that they are spaced at equal intervals in the circumferential direction about the axis. geometric and are open at both ends of them in a vertical direction.
    [0016] In a preferred example, each of the plurality of internal recessed portions is defined by an internal circular arc-shaped wall surface that extends in a circular arc shape about the axis as a center; an outer circular arc wall surface that extends in a circular arc shape about the axis as a radially outward center of the inner circular arc wall surface; a pair of semi-circular wall surfaces respectively continuously connected to the inner circular arc-shaped wall surface and the outer circular-arc-shaped wall surface, and opposite each other in the circumferential direction; and a back wall surface continuously connected to the respective ones of the inner circular arc-shaped wall surface, the outer circular-arc-shaped wall surface and the pair of semi-circular wall surfaces. Additionally, each of the plurality of external recessed portions is defined by an internal circular arc-shaped wall surface that extends in a circular arc shape about the axis as the center; an outer circular arc wall surface that extends in a circular arc shape about the axis as the radially outward center of the inner circular arc wall surface; a pair of semi-circular wall surfaces respectively continuously connected to the inner circular arc-shaped wall surface and the outer circular-arc-shaped wall surface and opposite each other in the circumferential direction; and a back wall surface continuously connected to the respective ones of the inner circular arc-shaped wall surface, the outer circular-arc-shaped wall surface and the pair of semi-circular wall surfaces.
    [0017] In another preferred example, the thrust sliding bearing part portion has at least two annular recessed grooves, which include an inner annular recessed groove and an outer recessed groove, which are formed in an annular upper surface thereof concentrically from each other in such a way as to extend along the circumferential direction about the geometric axis.
    [0018] It is sufficient if the ratio of a total area of opening surfaces of the plurality of internal recessed portions and external recessed portions, which are adapted to retain a lubricant, such as grease, on surfaces that combine the opening surfaces of the pluralities of inner recessed portions and outer recessed portions and the annular top surface of the thrust sliding bearing part portion, and the ratio of a total area of opening surfaces of the at least two annular recessed grooves, which include the inner annular recessed groove and the outer annular recessed groove, on surfaces that combine the opening surfaces of the at least two annular recessed grooves, which include the inner annular recessed groove and the outer annular recessed groove, and the annular top surface of the thrust sliding bearing part portion , are at least 20%. If these ratios exceed 50%, a decline in the strength of the thrust sliding bearing part portion is implied, and plastic deformation such as wrinkling is likely to occur in the thrust sliding bearing part portion, and therefore these ratios are preferably from 20% to 50%.
    [0019] The plurality of axial grooves, which are formed in the second cylindrical inner peripheral surface of the radial sliding bearing part portion in such a way as to be spaced at equal intervals in the circumferential direction about the geometric axis and are open at both ends of the even in the vertical direction, it can also serve as a crankcase section to retain lubricant such as grease.
    [0020] In the sliding bearing made of synthetic resin according to the present invention, the lower housing base portion may additionally have an annular recessed portion formed on an annular upper surface thereof in the circumferential direction about the geometric axis, in which case the first portions protrude and indented portions of the corrugated entanglement portion are formed on the annular upper surface of the lower casing base portion in the annular recessed portion, and the corrugated meshing portion may be entangled with the corrugated meshing portion in the annular recessed portion. In lieu of or in conjunction with such arrangements, the thrust sliding bearing part portion may additionally have an annular recessed portion formed on an annular lower surface thereof in the circumferential direction about the axis, in which case the second portions project. and indented portions of the corrugated mesh portion are formed on the annular bottom surface of the thrust sliding roller part portion in the annular recessed portion, and the corrugated mesh portion can be meshed with the corrugated mesh portion in the annular recessed portion.
    [0021] The slip bearing made of synthetic resin according to the present invention is preferably used as a slip bearing for a strut-type suspension of a four-wheel motor vehicle.
    [0022] The synthetic resin for forming the upper shell may be a thermoplastic synthetic resin such as polyacetal resin, polyamide resin or polybutylene terephthalate resin, and the synthetic resin for forming the lower shell may be a reinforced thermoplastic synthetic resin such as polyacetal resin, polyamide resin or polybutylene terephthalate resin which contains from 30 to 50% by mass of a reinforcing filler which includes glass fibers, glass powder, carbon fibers and the like. As well as the synthetic resin for forming the sliding bearing part, it is possible to cite a thermoplastic synthetic resin such as polyolefin resin which includes polyacetal resin, polyamide resin, polybutylene terephthalate resin and polyester resin as preferred examples. ADVANTAGES OF THE INVENTION
    [0023] According to the present invention, it is possible to provide a sliding bearing made of synthetic resin which has the ability to prevent slipping between the sliding bearing part made of synthetic resin and the lower housing made of reinforced synthetic resin which contains a load reinforcement such as glass fibers, which thereby makes it possible to maintain a smooth steering wheel steering operation. BRIEF DESCRIPTION OF THE DRAWINGS
    [0024] Figure 1 is an explanatory cross-sectional view, taken in the direction of arrows along the line I - I shown in Figure 2, of a preferred embodiment of the present invention;
    [0025] Figure 2 is an explanatory plan view of the embodiment shown in Figure 1;
    [0026] Figure 3 is a partially enlarged explanatory cross-sectional view of the embodiment shown in Figure 1;
    [0027] Figure 4 is an explanatory cross-sectional view of an upper casing of the embodiment shown in Figure 1;
    [0028] Figure 5 is a partially enlarged explanatory cross-sectional view of the upper housing shown in Figure 4;
    [0029] Figure 6 is an explanatory plan view of a lower casing of the embodiment shown in Figure 1;
    [0030] Figure 7 is an explanatory cross-sectional view, taken in the direction of arrows along line VII - VII, of the lower casing of the embodiment shown in Figure 6;
    [0031] Figure 8 is an explanatory bottom view of the lower housing shown in Figure 6;
    [0032] Figure 9 is a partially enlarged explanatory cross-sectional view of the lower housing shown in Figure 7;
    [0033] Figure 10 is a partially enlarged explanatory plan view of the lower housing shown in Figure 6;
    [0034] Figure 11 is an explanatory cross-sectional view, taken in the direction of arrows along line XI - XI, of the lower casing shown in Figure 6;
    [0035] Figure 12 is an explanatory perspective view of the lower housing of the embodiment shown in Figure 1;
    [0036] Figure 13 is an explanatory front view of a sliding bearing piece of the embodiment shown in Figure 1;
    [0037] Figure 14 is an explanatory plan view of the sliding bearing part shown in Figure 13;
    [0038] Figure 15 is an explanatory cross-sectional view, taken in the direction of arrows along the line XV - XV, of the sliding bearing part shown in Figure 14;
    [0039] Figure 16 is a partially enlarged explanatory cross-sectional view of the sliding bearing part shown in Figure 15;
    [0040] Figure 17 is a partially enlarged front view explanatory of a corrugated entanglement portion formed in the sliding bearing piece shown in Figure 13;
    [0041] Figure 18 is a partially enlarged plan view of the sliding bearing part shown in Figure 14;
    [0042] Figure 19 is an explanatory perspective view of the sliding bearing part shown in Figure 13;
    [0043] Figure 20 is an explanatory plan view of another example of the sliding bearing part of the embodiment shown in Figure 1;
    [0044] Figure 21 is an explanatory cross-sectional view, taken in the direction of arrows along line XXI - XXI, of the sliding bearing part shown in Figure 20; and
    [0045] Figure 22 is an explanatory cross-sectional view in which the sliding bearing shown in Figure 1 is incorporated into a strut-type suspension. METHOD OF IMPLEMENTING THE INVENTION
    [0046] In Figures 1 to 3, a sliding bearing made of synthetic resin 1 according to this embodiment for use in a strut type suspension of a four-wheel motor vehicle is provided with an upper housing made of synthetic resin 2 which is affixed to the side of the vehicle body via a mounting member; a lower housing made of reinforced synthetic resin 3 which is superimposed on the upper housing 2 so as to be rotatable about an axis O in a circumferential direction R with respect to the upper housing 2; and a sliding bearing part made of synthetic resin 5 arranged in a space 4 between the upper housing 2 and the lower housing 3.
    [0047] As shown particularly in Figures 4 and 5, the upper shell 2 integrally includes: an annular upper shell base portion 13 having an annular upper surface 11 and an annular lower surface 12 in an axial direction Y; an inner cylindrical hanging portion 17 having a cylindrical inner peripheral surface 15 defining a central through hole 14 and a cylindrical outer peripheral surface 16 opposite the cylindrical inner peripheral surface 15 in a radial direction X and which is suspended from a cylindrical outer peripheral surface 16 inner edge of the lower annular surface 12 of the upper shell base portion 13; a cylindrical engagement suspended portion 20 which is suspended from an outer edge portion of the annular lower surface 12 of the upper shell base portion 13 and has a domed engagement portion 19 on a lower portion of a cylindrical inner peripheral surface 18 thereof continuously connected to the lower annular surface 12 of the upper shell base portion 13; an outer cylindrical hanging portion 23 suspended from the annular lower surface 12 of the upper casing base portion 13 so as to form a wide cylindrical recessed portion 21 in cooperation with the cylindrical outer peripheral surface 16 of the inner cylindrical hanging portion 17 and the surface lower annular 12 of the upper casing base portion 13, while forming a narrow cylindrical recessed portion 22 in cooperation with the cylindrical inner peripheral surface 18 of the cylindrical hook suspended portion 20 and the annular lower surface 12 of the upper casing base portion 13; a small inner cylindrical hanging portion 25 suspended from an annular lower end face 24 of the inner cylindrical hanging portion 17; and a small outer cylindrical hanging portion 27 suspended from the annular lower end face 24 of the inner cylindrical hanging portion 17 so as to form a cylindrical recessed portion 26 in cooperation with the small inner cylindrical hanging portion 25 and the annular lower end face 24 of the inner cylindrical suspended portion 17
    [0048] The upper shell base portion 13 includes a thin wall base portion 31 having an annular lower surface 12 and an annular upper surface 30; a thick-walled base portion 34 formed integrally with the annular top surface 30 of the thin-walled base portion 31 and having a cylindrical inner peripheral surface 32 and a cylindrical outer peripheral surface 33; a plurality of rib portions 35 formed integrally on the annular top surface 30 of the thin-walled base portion 31 and on the cylindrical inner peripheral surface 32 of the thick-walled base portion 34, respectively, and disposed at equal intervals in the circumferential direction R in around the geometric axis O; and a plurality of hole portions 39 that are rectangular in plan view and are formed on an annular top surface 36 of the thick-walled base portion 34 by arranging, at equal intervals in the circumferential direction R, in two rows in the radial direction X and which are open in that annular top surface 36 and are each defined by a bottom wall surface 37 in the thick wall base portion 34 and a pair of sloping wall surfaces 38 which gradually approach each other at from the annular top surface 36 towards the bottom wall surface 37 in the axial direction Y. Thus, the annular top surface 11 of the top casing base portion 13 is constituted by the annular top surface 30 of the thin wall base portion 31 and the annular top surface 36 of the thick-walled base portion 34, and the thick-walled base portion 34 is integrally formed into the thin-walled base portion 31 on the top. annular top surface 30 of the thin wall base portion 31. The plurality of hole portions 39 extending in the axial direction Y are designed to make the thickness of the thick wall base portion 34 as uniform as possible to as much as possible avoid sink marks and the like occur during molding, and the plurality of ribs 35 reinforce the thick wall base portion 34 relative to the thin wall base portion 31.
    [0049] The cylindrical inner peripheral surface 18 is constituted by an annular inclined surface portion 41 which is gradually enlarged, in diameter, outward in the radial direction X from the annular bottom surface 12 towards an underside, and the engagement cup 19 which bulges from the cylindrical inner peripheral surface 18 inward in the radial direction X has an annular inclined surface 42 which is continuously connected to the annular inclined surface portion 41 and is gradually reduced in diameter inwards in the radial direction X from the annular inclined surface portion 41 towards a lower side, as well as an annular inclined surface portion 43 which is continuously connected to the annular inclined surface portion 42 and is gradually enlarged, in diameter, outwards in the radial direction X from the annular inclined surface 42 towards a lower side. The cylindrical engaging suspended portion 20 has a cylindrical outer peripheral surface 44 continuously connected to the annular upper surface 30.
    [0050] As shown particularly in Figures 6 to 12, the lower shell 3 includes: an annular lower shell base portion 53 having an annular upper surface 51 and an annular lower surface 52 in the Y-axial direction; a corrugated entanglement portion 56 which is formed with projecting portions 54 and indented portions 55 which, respectively, are triangular in shape in cross-sectional view and are alternatively disposed on the annular upper surface 51 of the lower casing base portion 53 along from the circumferential direction R about the geometric axis O; a cylindrical protuberance 57 projecting from the annular upper surface 51 of the lower shell base portion 53; a cylindrical engaged protruding portion 61 having a domed portion 60 engaged with an upper portion of a cylindrical outer peripheral surface 59 thereof and projecting from an outer edge portion of the annular upper surface 51 of the housing base portion lower 53 so as to form a cylindrical recessed portion 58 in cooperation with the cylindrical protuberance 57 and the lower shell base portion 53; a cylindrical hanging portion 62 suspended from an inner edge portion of the annular lower surface 52 of the lower shell base portion 53; an annular raised portion 64 projecting radially inwardly from a cylindrical inner peripheral surface 63 of the cylindrical hanging portion 62; a cylindrical protuberance 67 projecting from an annular top surface 65 of the annular protruding portion 64 to form a cylindrical recessed portion 66 in cooperation with the lower shell base portion 53 and the annular protruding portion 64; and an annular protruding portion 69 protruding radially inwardly from a lower edge portion of a cylindrical inner peripheral surface 68 of the annular protruding portion 64.
    [0051] The lower shell base portion 53 which has a cylindrical inner peripheral surface 70 continuously connected to the annular upper surface 65 has an annular recessed portion 71 formed in the annular upper surface 51 in the circumferential direction R about the axis O and a plurality of rectangular recessed portions 72 formed on the annular upper surface 51 at equiangular intervals in the circumferential direction R around the geometric axis O. Projecting portions 54 and indented portions 55 are formed on the annular upper surface 51 of the lower casing base portion 53 in the annular recessed portion 71. The cylindrical recessed portion 58 is defined by a cylindrical inclined surface 73 of the cylindrical engaged protruding portion 61 which is reduced in diameter from an annular upper surface 82 of the cylindrical engaged protruding portion 61 towards a lower side , a cylindrical inclined surface 75 of the cylindrical protuberance 57, which is enlarged in diameter from an annular top surface 74 of cylindrical protuberance 57 towards a lower side and an annular flat surface 76 of lower shell base portion 53. Engaged domed portion 60 has an inclined surface annular 77, which is opposite the annular inclined surface 42, is continuously connected to the annular top surface 82 and is gradually enlarged, in diameter, outwards in the radial direction X from the annular top surface 82 towards a lower side, as well as an annular sloped surface 78 which is opposite the annular sloped surface 43, is continuously connected to the annular sloped surface 77 and is gradually reduced in diameter inward in the radial direction X from the annular sloped surface 77 towards a lower side. The cylindrical hanging portion 62 has a cylindrical outer peripheral surface 79 continuously connected to the lower annular surface 52; annular raised portion 69 has a cylindrical inner peripheral surface 80; and the cylindrical inner peripheral surface 63, the cylindrical inner peripheral surface 68, the cylindrical inner peripheral surface 70 and the cylindrical inner peripheral surface 80 define a central through hole 81 that communicates with the central through hole 14.
    [0052] As shown particularly in Figures 13 to 19, the sliding bearing part made of synthetic resin 5 arranged in the space 4 includes: a portion of the thrust sliding bearing part 93 having an annular bottom surface 91 in the axial direction Y which is brought into contact with the annular top surface 51 of the lower casing base portion 53 and an annular top surface 92 in the axial direction Y which is brought into contact with the annular bottom surface 12 of the top casing base portion 13, slidingly, in the circumferential direction R about the geometric axis O; a cylindrical radial slide bearing piece portion 96 which is suspended from an inner edge portion of the annular bottom surface 91 of the thrust slide bearing piece portion 93 and has a cylindrical outer peripheral surface 94 which is brought into contact with the cylindrical inner peripheral surface 70 of the lower housing base portion 53 and a cylindrical inner peripheral surface 95 which is slidably contacted with the cylindrical outer peripheral surface 16 of the inner cylindrical hanging portion 17 in the circumferential direction R around of the geometric axis O; and a corrugated mesh portion 99 which is formed with protruding portions 97 and indented portions 98 which, respectively, are triangular in shape in cross-sectional view and are alternatively disposed on the annular bottom surface 91 of the thrust sliding bearing part portion 93 along the circumferential direction R about the axis O, and which is entangled with the corrugated entanglement portion 56 such that rotation in the circumferential direction R about the axis O, with respect to the lower casing 3, is avoided through the lower housing 3.
    [0053] The thrust sliding bearing part portion 93 has a plurality of inner recessed portions 101 and outer recessed portions 102 which are formed on the annular top surface 92 along the circumferential direction R about the axis O in two rows that include an inner row and an outer row in the radial direction X, wherein the inner recessed portions 101 and the outer recessed portions 102 are arranged with mutual phase differences in the circumferential direction R about the geometric axis O.
    [0054] Each of the inner recessed portions 101 formed in the inner row is defined by an inner circular arc-shaped wall surface 103 that extends, in a circular arc shape, around the axis O as the center; an outer circular arc-shaped wall surface 104 that extends, in a circular arc-shape, about the axis O as the outward center of the inner circular-arc-shaped wall surface 103 in the radial direction X, that is that is, the diameter of which is enlarged in the radial direction X relative to the inner circular arc-shaped wall surface 103; a pair of semi-circular wall surfaces 105, respectively, continuously connected to the inner circular arc-shaped wall surface 103 and the outer circular-arc-shaped wall surface 104 and opposite each other in the circumferential direction R; and a bottom wall surface 106 continuously connected to respective of the inner circular arc wall surface 103, the outer circular arc wall surface 104 and the pair of semicircular wall surfaces 105.
    [0055] Each of the plurality of outer recessed portions 102 disposed in the outer row is defined by an inner circular arc-shaped wall surface 108 that extends, in a circular arc shape, about the geometric axis O as the center; an outer circular arc-shaped wall surface 109 that extends, in a circular arc-shape, about the axis O as the outward center of the inner circular-arc-shaped wall surface 108 in the radial direction X, that is that is, the diameter of which is enlarged in the radial direction X relative to the inner circular arc-shaped wall surface 108; a pair of semi-circular wall surfaces 110, respectively, continuously connected to both the inner circular arc-shaped wall surface 108 and the outer circular arc-shaped wall surface 109 and opposite each other in the circumferential direction R; and a bottom wall surface 111 continuously connected to respective of the inner circular arc wall surface 108, the outer circular arc wall surface 109 and the pair of semicircular wall surfaces 110. Each outer recessed portion 102 is arranged in a position corresponding to a discontinuous portion 112 in the circumferential direction R between adjacent inner recessed portions 101 formed in the inner row. Thus, the inner recessed portions 101 and the outer recessed portions 102 are arranged with phase differences relative to each other in the circumferential direction R.
    [0056] The radial sliding bearing part portion 96 has a plurality of axial grooves 115 which are formed in the cylindrical inner peripheral surface 95 such that they are spaced at equal intervals in the circumferential direction R about the geometric axis O and which are open at both their ends in the axial direction Y, that is, the vertical direction.
    [0057] The plurality of inner recesses 101 and outer recesses 102 and the plurality of axial grooves 115 serve as a collection section for lubricating oil, such as grease.
    [0058] Thrust sliding bearing part portion 93 includes a thick wall thrust sliding bearing part portion 117 which has, in addition to the annular top surface 92 and annular bottom surface 91, a cylindrical outer peripheral surface 116 opposite the cylindrical inner peripheral surface of the cylindrical protuberance 57 outwards in the radial direction X, as well as a thin-wall thrust sliding bearing part portion 119 that is integrally connected continuously to the thrust sliding bearing part portion 119 thick wall 117 inwardly in the radial direction X and has the annular bottom surface 91 which is flush with the annular bottom surface 91 of the thick wall thrust sliding roller piece portion 117 and on which the corrugated mesh portion 99 is formed , as well as an annular top surface 118 located at a lower position than the annular top surface 92. The bearing part portion radial slider 96 is suspended from an inner edge portion of the annular bottom surface 91 of the thin wall thrust slider part portion 119, which constitutes an inner edge portion of the annular bottom surface 91 of the bearing part portion thrust slider 93. Thin wall base portion 31 of upper shell base portion 13 is brought into contact with annular top surface 92 of cylindrical protuberance 57, i.e., annular top surface 92 of bearing piece portion thrust slider 93 on the lower annular surface 12 slidably in the circumferential direction R about the geometric axis O. The lower housing base portion 53 of the lower housing 3 is respectively brought into contact with the respective annular lower surface 91 of the thick wall thrust slider part portion 117 and the thin wall thrust slider part portion 119, q which forms the annular bottom surface 91 of the thrust sliding bearing part portion 93 on the annular top surface 51.
    [0059] The plurality of inner recessed portions 101 and outer recessed portions 102, which are formed on the annular top surface 92 of the thick wall thrust sliding roller part portion 117 of the thrust sliding roller part portion 93 along the circumferential direction R and in two rows, which include the inner row and the outer row, in the radial direction X, are arranged in such a way that the ratio of the total area of the opening surfaces 120 of the inner recessed portions 101 to the outer recessed portions 102, in a total area that combines the opening surfaces 120 of the inner recessed portions 101 and the outer recessed portions 102 and the annular top surface 92 of the thick wall thrust sliding roller part portion 117, i.e., a surface of thrust sliding bearing, be 20 to 50%, preferably 30 to 40%.
    [0060] As shown in Figures 20 and 21, the thrust sliding bearing part portion 93 of the sliding bearing part portion 5 may have an inner annular recessed groove 121 and an outer annular recessed groove 122 which are formed in the upper surface annular 92 of the thick wall thrust slider part portion 117 concentrically with each other such that they extend in the circumferential direction R about the geometric axis O.
    [0061] The inner annular recessed groove 121 and the outer annular recessed groove 122 are formed such that the ratio of the total area of opening surfaces 120 of the inner annular recessed groove 121 to the outer annular recessed groove 122, in an area which combines the respective opening surfaces 120 of the inner annular recessed groove 121 and the outer annular recessed groove 122 and the annular top surface 92 of the thick wall thrust sliding bearing piece portion 117, i.e. a sliding bearing surface impulse, be 20 to 50%, preferably 30 to 40%.
    [0062] According to the thrust sliding bearing part portion 93 of the sliding bearing part 5 thus formed, whereas the inner recessed portions 101 and the outer recessed portions 102, or the inner annular recessed groove 121 and the recessed groove outer annular surface 122, are formed on the annular top surface 92, in relative sliding in the circumferential direction R about the geometric axis O between the annular top surface 92 of the thrust sliding bearing part portion 93 and the annular bottom surface 12 of the upper housing base 13, it is possible to reduce the contact area between the upper annular surface 92, which is the thrust sliding bearing surface and constitutes the sliding surface, and the coupling member, i.e. the lower annular surface 12 of the upper casing base portion 13, thereby making it possible to increase the surface pressure (load per unit area) acting on the annular upper surface 92 Therefore, it is possible to obtain additional lower friction through a combination of the lower friction due to the friction between the synthetic resins and the lower friction due to the presence, on the sliding surfaces, of the lubricating oil which is filled in the internal recessed portions 101 and in the outer recessed portions 102, or the inner annular recessed groove 121 and the outer annular recessed groove 122.
    [0063] The upper housing 2 is combined with the lower housing 3 through the arrangement of the cylindrical engaged protruding portion 61 in the cylindrical recessed portion 22, through the arrangement of the cylindrical protuberance 67 in the cylindrical recessed portion 26, through the arrangement of the outer cylindrical suspended portion 23 in the cylindrical recessed portion 58, and by resiliently engaging the domed engaging portion 19 with the domed, engaging cylindrical portion 61.
    [0064] In the combination of the upper housing 2 and the lower housing 3, as the corrugated entanglement portion 99 is entangled with the corrugated entanglement portion 56 in the annular recessed portion 71 through the arrangement of the projecting portions 97 in the indented portions 55 of the entanglement portion 56 and by arranging the indented portions 55 on the projecting portions 54 of the corrugated entanglement portion 56, the rotation of the sliding bearing piece 5 in the circumferential direction R about the geometric axis O with respect to the lower housing 3 is adapted to be avoided.
    [0065] In such a sliding bearing 1, sealing portions that exhibit labyrinth action on the outer peripheral side and the inner peripheral side are formed by arranging the cylindrical engaged protruding portion 61 in the cylindrical recessed portion 22 and by arranging the cylindrical hanging portion 23 in the recessed cylindrical portion 58 in the section for resiliently engaging the recessed engagement portion 19 with the recessed cylindrical recessed portion 61, as well as through the arrangement of the cylindrical protuberance 67 in the recessed cylindrical portion 26. As a result, the inlet of dust, muddy water and the like in the space 4 is avoided, thus preventing, as practically as possible, a decline in the sliding characteristics due to the ingress of dust and the like on the respective sliding surfaces between the annular upper surface 92 of the thrust slide bearing part portion 93 and annular bottom surface 12 of inv base portion the upper recess 13 and between the cylindrical inner peripheral surface 95 of the radial sliding bearing part portion 96 and the cylindrical outer peripheral surface 16 of the inner cylindrical hanging portion 17.
    [0066] Furthermore, with the sliding bearing 1, since the sliding bearing part 5 is prevented from rotating in the circumferential direction R around the geometric axis O with respect to the lower housing 3 and being integrated into the lower housing 3, the sliding between the sliding bearing part 5 and the lower housing 3 is avoided, and the sliding is therefore confined to the sliding between synthetic resins of excellent sliding characteristics, i.e. between the annular upper surface 92 of the bearing part portion thrust slider 93 and annular bottom surface 12 of upper housing base portion 13 and between cylindrical inner peripheral surface 95 of radial sliding bearing piece portion 96 and cylindrical outer peripheral surface 16 of inner cylindrical hanging portion 17.
    [0067] As shown in Figure 22, the slide bearing 1 can be applied to a strut-type suspension on a four-wheel motor vehicle by arranging the slide bearing 1 between a vehicle body side bearing surface 133 of a vehicle body side mounting member 131 and an upper end portion of a coil suspension spring 132 such that the annular upper surface 11 of the upper housing 2 is brought into contact with the vehicle body side mounting member. vehicle 131, and such that the annular lower surface 52 of the lower housing base portion 53, which serves as a spring bearing surface, is glued in contact with the upper end portion of the coil suspension spring 132.
    [0068] In the strut-type suspension shown in Figure 22, relative rotation in the circumferential direction R of the helical suspension spring 132, relative to the vehicle body side mounting member 131, is allowed in the slide bearing 1 by the relative sliding in the circumferential direction R between the respective synthetic resins, with excellent sliding characteristics, of the annular upper surface 92 of the thrust sliding bearing part portion 93 relative to the annular lower surface 12 of the upper casing base portion 13 and the peripheral surface internal cylindrical 95 of the radial sliding bearing part portion 96 relative to the cylindrical outer peripheral surface 16 of the inner cylindrical hanging portion 17. DESCRIPTION OF REFERENCE NUMBERS 1: sliding bearing 2: upper housing 3: lower housing 5: sliding bearing part 13: upper casing base17: inner cylindrical suspended portion20: enclosing suspended portion cylindrical gate23: outer cylindrical hanging portion25: inner cylindrical small hanging portion27: outer cylindrical small hanging portion53: lower casing base portion56: corrugated entanglement portion57: cylindrical protuberance61: cylindrical engaged protruding portion62: cylindrical hanging portion64: annular protruding portion67: cylindrical protuberance69 : annular protruding portion93: thrust sliding bearing part portion96: radial sliding bearing part portion99: corrugated mesh portion
    权利要求:
    Claims (10)
    [0001]
    1. Sliding bearing made of synthetic resin (1) CHARACTERIZED in that it comprises: an upper housing made of synthetic resin (2), a lower housing made of reinforced synthetic resin (3) superimposed on said upper housing (2) so as to to be rotatable about a geometric axis with respect to said upper housing (2), and a sliding bearing piece made of synthetic resin (5) arranged between said upper housing (2) and said lower housing (3), wherein said upper shell (2) includes: an annular upper shell base portion (13); an inner cylindrical hanging portion (17) having a first cylindrical outer peripheral surface (16) continuously connected to an annular lower surface (12) of the upper shell base portion (13) and suspended from an inner edge portion the annular lower surface (12) of the upper shell base portion (13); a cylindrical engaging suspended portion (20) which is suspended from an outer edge portion of the annular lower surface (12) of the upper shell base portion (13) and has a domed engagement portion (19) in a portion bottom of a first cylindrical inner peripheral surface (18) continuously connected to the annular bottom surface (12) of the upper shell base portion (13); and an outer cylindrical suspended portion (23) suspended from the annular lower surface (12) of the upper casing base portion (13) to form a first cylindrical recessed portion in cooperation with the cylindrical engaging suspended portion (20) and the upper shell base portion (13), wherein said lower shell (3) includes: an annular lower shell base portion (53); a corrugated entanglement portion (56) that is formed with first projecting portions (54) and indented portions (55) and arranged alternately on an annular upper surface (51) of the lower shell base portion (53) along a direction circumferential about the geometric axis; a cylindrical protuberance (57) protruding from the annular top surface (51) of the lower shell base portion (53); and a cylindrical engaged protruding portion (61) having a domed portion engaged (60) with an upper portion of a second cylindrical outer peripheral surface (59) and projecting from an outer edge portion of the annular upper surface (51) of the lower housing base portion (53) so as to form a second cylindrical recessed portion in cooperation with the cylindrical protuberance (57) and the lower housing base portion (53), wherein said sliding bearing part (5) includes: a thrust sliding bearing part portion (93) having an annular lower surface (91) that is contacted with the annular upper surface (51) of the lower housing base portion (53) and an upper surface annular (92) which is slidably brought into contact with the annular lower surface (12) of the upper casing base portion (13); a cylindrical radial slide bearing piece portion (96) suspended from an inner edge portion of the annular bottom surface (91) of the thrust slide bearing piece portion (93) and having a second cylindrical inner peripheral surface ( 95) which is slidably brought into contact with the first cylindrical outer peripheral surface (16) of the inner cylindrical hanging portion (17); and a corrugated mesh portion (99) which is formed with second projecting portions (97) and indented portions (98) arranged alternately on the annular bottom surface (91) of the thrust sliding bearing piece portion (93) along the circumferential direction about the axis, and which is entangled with the corrugated entanglement portion (56) so that rotation about the axis with respect to said lower housing (3) is prevented by said lower housing (3), wherein said upper housing (2) is combined with said lower housing (3) by arranging the cylindrical engaged protruding portion (61) in the first cylindrical recessed portion, by arranging the outer cylindrical hanging portion (23) in the second cylindrical recessed portion, and through resilient engagement of the domed engaging portion (19) to the domed engaged portion (60).
    [0002]
    2. Sliding bearing made of synthetic resin (1), according to claim 1, CHARACTERIZED by the fact that said upper housing (2) additionally includes an internal cylindrical small suspended portion (25) suspended from an end face lower annular (24) of the inner cylindrical suspended portion (17) and an outer cylindrical small suspended portion (27) suspended from an annular lower surface (24) of the inner cylindrical suspended portion (17) to form a third recessed cylindrical recessed portion (27) cooperation with the inner cylindrical hanging portion (25) and the inner cylindrical hanging portion (17), and wherein said lower shell (3) further includes a cylindrical hanging portion (62) suspended from an inner edge portion of the annular bottom surface (52) of the lower shell base portion (53), a first annular protruding portion (64) protruding radially inwardly from an inner peripheral surface One cylindrical portion (63) of the cylindrical hanging portion (62), another cylindrical protuberance (67) protruding from an annular upper surface (65) of the first annular raised portion (64) to form a cooperating fourth cylindrical recessed portion with the lower shell base portion (53) and the first annular raised portion (64), and a second annular raised portion (69) protruding radially inwardly from a lower edge portion of a cylindrical inner peripheral surface (68) of the first annular protruding portion (64), wherein said upper shell (2) is combined with said lower shell (3) by arranging the other cylindrical protuberance (67) of said lower shell (3) in the third cylindrical recessed portion.
    [0003]
    3. Sliding bearing made of synthetic resin (1), according to claim 1 or 2, CHARACTERIZED in that the thrust sliding bearing part portion (93) has a plurality of internal recessed portions (101) and recessed portions outer (102) which are formed on an annular top surface (92) thereof along the circumferential direction and in at least two rows which include an inner row and an outer row in the radial direction, the inner recessed portions (101) and the external recessed portions (102) are arranged with phase differences with respect to each other in the circumferential direction about the axis, and the radial sliding bearing piece portion (96) has a plurality of axial grooves (115) which are formed in a second cylindrical inner peripheral surface (95) thereof such that they are spaced at equal intervals in the circumferential direction about the geometric axis and are open at both ends thereof s in a vertical direction.
    [0004]
    4. Sliding bearing made of synthetic resin (1), according to claim 3, CHARACTERIZED by the fact that each of the plurality of internal recessed portions (101) is defined by an internal circular arc-shaped wall surface ( 103) which extends in a circular arc shape about the geometric axis as a center; an outer circular arc-shaped wall surface (104) extending in a circular arc shape about the axis as a radially outward center of the inner circular-arc-shaped wall surface (103); a pair of semi-circular wall surfaces (105) respectively continuously connected to the inner circular arc-shaped wall surface (103) and the outer circular-arc-shaped wall surface (104) and opposite each other in the circumferential direction ; and a back wall surface (106) continuously connected to the respective ones of the inner circular arc wall surface (103), the outer circular arc wall surface (104) and the pair of semicircular wall surfaces ( 105).
    [0005]
    5. Sliding bearing made of synthetic resin (1), according to claim 3 or 4, CHARACTERIZED by the fact that each of the plurality of external recessed portions (102) is defined by a wall surface in the form of a circular arc inner (108) extending in a circular arc shape about the axis as the center; an outer circular arc wall surface (109) extending in a circular arc shape about the axis as the radially outward center of the inner circular arc wall surface (108); a pair of semi-circular wall surfaces (110) respectively continuously connected to the inner circular arc-shaped wall surface (108) and the outer circular-arc-shaped wall surface (109) and opposite each other in the circumferential direction ; and a back wall surface (111) continuously connected to the respective ones of the inner circular arc wall surface (108), the outer circular arc wall surface (109) and the pair of semicircular wall surfaces ( 110).
    [0006]
    6. Sliding bearing made of synthetic resin (1), according to any one of claims 3 to 5, CHARACTERIZED in that a ratio of a total area of opening surfaces (120) of the plurality of internal recessed portions (101) and outer recessed portions (102) on surfaces that combine the opening surfaces (120) of the plurality of inner recessed portions (101) and outer recessed portions (102) and the annular upper surface (92) of the sliding bearing piece portion of impulse (93) is 20 to 50%.
    [0007]
    7. Slip bearing made of synthetic resin (1), according to claim 1 or 2, CHARACTERIZED in that the thrust sliding bearing part portion (93) has at least two annular recessed grooves (121, 122) , which include an inner annular recessed groove (121) and an outer recessed groove (122), which are formed in an annular top surface (92) thereof concentrically with each other such that they extend along the circumferential direction about the axis geometric.
    [0008]
    8. Sliding bearing made of synthetic resin (1), according to claim 7, CHARACTERIZED in that a ratio of a total area of opening surfaces (120) of the at least two annular recessed grooves (121, 122), which include the inner annular recessed groove (121) and the outer annular recessed groove (122), on surfaces that match the opening surfaces (120) of the at least two annular recessed grooves (121, 122), which include the annular recessed groove inner (121) and outer annular recessed groove (122), and the annular top surface (92) of the thrust sliding bearing part portion (93) is 20 to 50%.
    [0009]
    9. Sliding bearing made of synthetic resin (1), according to any one of claims 1 to 8, CHARACTERIZED in that the lower housing base portion (53) has an annular recessed portion (71) formed in a surface annular top (51) thereof in the circumferential direction about the geometric axis, wherein the first projecting portions (54) and indented portions (55) of the corrugated entanglement portion (56) are formed on the annular top surface (51) of the lower casing base (53) in the annular recessed portion (71), and the corrugated mesh portion (56) is entangled with the corrugated mesh portion (56) in the annular recessed portion (71).
    [0010]
    10. Sliding bearing made of synthetic resin (1) according to any one of claims 1 to 9, CHARACTERIZED in that the thrust sliding bearing part portion (93) has an annular recessed portion formed in a lower surface (91) thereof in the circumferential direction about the geometric axis, wherein the second projecting portions (97) and indented portions (98) of the corrugated entanglement portion (99) are formed on the annular lower surface (91) of the thrust slide bearing (93) in the annular recessed portion, and the corrugated mesh portion (99) is meshed with the corrugated mesh portion (56) in the annular recessed portion.
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    同族专利:
    公开号 | 公开日
    US9415656B2|2016-08-16|
    KR101753817B1|2017-07-04|
    EP2985479A4|2016-10-12|
    WO2014167771A1|2014-10-16|
    JP2014206206A|2014-10-30|
    ES2658700T3|2018-03-12|
    EP2985479B1|2017-11-22|
    CN105121870A|2015-12-02|
    CN105121870B|2018-04-10|
    PT2985479T|2018-02-26|
    EP2985479A1|2016-02-17|
    JP6057814B2|2017-01-11|
    US20160082800A1|2016-03-24|
    BR112015024283A2|2017-07-18|
    KR20150123336A|2015-11-03|
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    法律状态:
    2018-11-13| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2020-08-18| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2021-11-23| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2022-01-18| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 05/03/2014, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    JP2013083399A|JP6057814B2|2013-04-11|2013-04-11|Synthetic plastic plain bearing|
    JP2013-083399|2013-04-11|
    PCT/JP2014/001216|WO2014167771A1|2013-04-11|2014-03-05|Synthetic resin slide bearing|
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