JP2017044226A - Slide bearing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the deterioration of sliding performance due to the entry of dust, muddy water and the like.SOLUTION: A slide bearing 1 is equipped with: an upper case 2; a lower case 3 rotatably combined with the upper case 2, and forming an annular space 5; a center plate 4 which is disposed in the annular space 5, and supports a load applied on the upper case 2 while permitting rotations between the upper case 2 and the lower case 3; and a dust seal 6 which prevents a clearance of the annular space 5. The upper case 2 has an annular groove 25 formed on a lower surface 24. The lower case 3 has an annular projecting portion 33 formed on an upper surface 32 and inserted in the annular groove 25 to form the annular space 5. The dust seal 6 is joined with a side wall of the annular projecting portion 33, and inserted in seal installation grooves 320 and 321 having axial end portions 603 and 613 formed on the upper surface 32 of the lower case 3 along the side wall.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a sliding bearing that supports a load to be supported, and more particularly to a sliding bearing that supports a load of a vehicle body applied to a strut suspension while allowing a strut assembly of a strut suspension (McPherson strut) to rotate.

  A strut suspension used for a front wheel of an automobile has a structure in which a coil spring is combined with a strut assembly including a piston rod and a hydraulic shock absorber, and the strut assembly rotates together with the coil spring by a steering operation. Therefore, in order to support the load applied to the strut suspension while allowing the strut assembly to rotate smoothly, the upper mount, which is a mechanism for attaching the strut assembly to the vehicle body, and the spring seat at the upper end of the coil spring are usually used. A bearing is disposed between the upper spring seat.

  For example, Patent Document 1 discloses a sliding bearing made of synthetic resin as a bearing for a strut suspension. This sliding bearing is composed of a synthetic resin upper case attached to the upper mount side, a synthetic resin lower case attached to the upper spring seat side and rotatably coupled to the upper case, and between the upper case and the lower case. And a synthetic resin center plate for smoothly rotating.

  Here, an annular groove is formed on the surface of the upper case that faces the lower case, and an annular protrusion that is inserted into the annular groove of the upper case is formed on the surface of the lower case that faces the upper case. ing. By combining the upper case and the lower case, the annular protrusion of the lower case is inserted into the annular groove of the upper case to form an annular space. The center plate is disposed in this annular space.

  An outer seal is joined to the outer peripheral side wall surface of the annular projection of the lower case by insert molding, and an inner seal is joined to the inner peripheral side wall surface of the annular projection of the lower case by insert molding. . The outer seal bends and contacts the outer peripheral side wall surface of the annular groove of the upper case, thereby closing a gap between the outer peripheral side wall surface of the annular protrusion of the lower case and the outer peripheral side wall surface of the annular groove of the upper case. Further, the inner seal bends and contacts the inner peripheral side wall surface of the annular groove of the upper case, thereby forming a gap between the inner peripheral side wall surface of the annular protrusion of the lower case and the inner peripheral side wall surface of the upper case annular groove. Block it. For this reason, elastic bodies such as polyurethane resin and polyester elastomer are used for the outer seal and the inner and outer seals.

  According to the sliding bearing made of synthetic resin described in Patent Document 1, the annular space formed by combining the upper case and the lower case is sealed by the outer seal and the inner seal, and even under severe conditions, dust and muddy water Etc. can be prevented from entering the annular space, and therefore, it is possible to prevent the sliding performance from deteriorating due to the intrusion of dust, muddy water, etc. on the bearing surface of the center plate arranged in the annular space. it can.

JP 2013-083303 A

  As described above, in the synthetic resin sliding bearing described in Patent Document 1, the outer seal and the inner seal made of an elastic body such as polyurethane resin and polyester elastomer are provided in the lower case made of synthetic resin by insert molding. It is joined to the outer peripheral side wall surface and the inner peripheral side wall surface of the annular protrusion. However, the outer seal and the inner seal may be peeled off from the outer peripheral side wall surface or the inner peripheral side wall surface of the annular protrusion of the lower case during insert molding or due to long-term use. Due to the peeling of the outer seal or the inner seal, the sealing performance of the annular space formed by combining the upper case and the lower case is lowered, and dust, muddy water, etc. enter the annular space under severe conditions. As a result, the sliding performance may be reduced.

  This invention is made | formed in view of the said situation, The objective is to provide the sliding bearing which can prevent the fall of the sliding performance by infiltration of dust, muddy water, etc.

  In order to solve the above-described problem, in the sliding bearing of the present invention, a center plate is disposed in an annular space formed by combining an upper case and a lower case, and a dust seal is provided to close the annular space. A seal mounting groove is formed on a surface of the upper case facing the lower case or a surface facing the upper case of the lower case, and an axial end portion of the dust seal is mounted on the seal mounting groove.

For example, the sliding bearing of the present invention is
An upper case,
A lower case that is rotatably combined with the upper case to form an annular space with the upper case;
An annular center plate disposed in the annular space;
An annular dust seal that closes the gap in the annular space;
The dust seal is
An end of the dust seal in the axial direction is inserted into a seal mounting groove having a recess formed on a surface of the lower case facing the upper case or a surface facing the lower case of the upper case.

Here, the sliding bearing supports a load to be supported,
The upper case is
Having an annular groove formed on the surface facing the lower case;
The lower case is
Formed on a surface facing the upper case, and having an annular protrusion that forms the annular space by being inserted into the annular groove of the upper case,
The center plate is
The upper case and the lower case are allowed to rotate by being placed on the annular protrusion of the lower case and in sliding contact with a support target surface formed on the groove bottom of the annular groove of the upper case. While supporting the load of the support object applied to the upper case,
The seal mounting groove is
The lower case may be formed on the surface of the lower case facing the upper case or the surface of the upper case facing the lower case along the side wall of the annular groove of the lower case or the annular groove of the upper case. Good.

  The dust seal may be joined to the annular protrusion of the lower case or the annular groove side wall of the upper case by insert molding.

The sliding bearing supports the load of the vehicle body applied to the strut suspension while allowing the strut assembly of the strut suspension to rotate.
The upper case is attached to a mounting mechanism of the strut assembly to the vehicle body in a state where the strut assembly is inserted,
The lower case is attached to a spring seat at an upper end portion of a coil spring combined with the strut assembly in a state where the strut assembly is inserted,
The center plate may be disposed in the annular space in a state where the strut assembly is inserted.

  According to the present invention, the seal mounting groove is formed on the surface facing the lower case of the upper case or the surface facing the upper case of the lower case, and the axial end of the dust seal is mounted on the seal mounting groove. Therefore, it is possible to prevent the dust seal from peeling off from the lower case or the upper case. For this reason, it is possible to prevent the sealing performance of the annular space formed by combining the upper case and the lower case from being lowered, and therefore it is possible to prevent the sliding performance from being lowered due to intrusion of dust, muddy water, and the like. it can.

1A, FIG. 1B, and FIG. 1C are a plan view, a bottom view, and a front view of a plain bearing 1 according to an embodiment of the present invention, and FIG. It is AA sectional drawing of the plain bearing 1 shown to FIG. 1 (A). 2A is an enlarged view of a portion B of the plain bearing 1 shown in FIG. 1D, and FIG. 2B is an enlarged view of a portion C of the plain bearing 1 shown in FIG. 3A, 3B, and 3C are a plan view, a bottom view, and a front view of the upper case 2, and FIG. 3D is an upper case shown in FIG. FIG. 4A, 4B, and 4C are a plan view, a bottom view, and a front view of the lower case 3, and FIG. 4D is a lower case shown in FIG. 4A. FIG. 5A, FIG. 5B and FIG. 5C are a plan view, a bottom view and a front view of the center plate 4, and FIG. 5D is a center plate shown in FIG. 5A. FIG. 5E is an enlarged view of the G part of the center plate 4 shown in FIG. 5A. FIG. 6 is a view corresponding to FIG. 2B of a modification of the plain bearing 1 according to the embodiment of the present invention.

  Hereinafter, an embodiment of the present invention will be described.

  1A, FIG. 1B, and FIG. 1C are a plan view, a bottom view, and a front view of a plain bearing 1 according to the present embodiment, and FIG. It is AA arrow sectional drawing of the sliding bearing 1 shown to A). 2A is an enlarged view of a portion B of the plain bearing 1 shown in FIG. 1D, and FIG. 2B is an enlarged view of a portion C of the plain bearing 1 shown in FIG. 1D. is there.

  The sliding bearing 1 according to the present embodiment includes a housing hole 10 for housing a strut assembly (not shown) of a strut suspension, and allows the strut assembly housed in the housing hole 10 to rotate. Supports the body load applied to the strut suspension. As shown in the figure, the plain bearing 1 includes an upper case 2, a lower case 3 that is rotatably combined with the upper case 2, and forms an annular space 5 between the upper case 2 and the annular space 5. The annular center plate 4 arranged, the annular space 5 is hermetically sealed, an annular dust seal 6 in which foreign matters such as dust enter the annular space 5, and the lubrication filled in the annular space 5 (not shown). And grease.

  The upper case 2 is formed of a thermoplastic resin having excellent sliding characteristics such as a polyacetal resin impregnated with lubricating oil as necessary, and the strut assembly strut assembly is inserted into the vehicle body in a state where the strut assembly is inserted. It is attached to an upper support (not shown) which is an attachment mechanism.

  3A, 3B, and 3C are a plan view, a bottom view, and a front view of the upper case 2, and FIG. 3D is an upper case shown in FIG. FIG.

  As shown in the drawing, the upper case 2 is formed on an annular upper case main body 21 having an insertion hole 20 for inserting a strut assembly, and an upper surface 22 of the upper case main body 21, and is attached to an upper support. 23, an annular groove 25 formed on the lower surface 24 of the upper case main body 21 facing the lower case 3 and rotatably combined with the lower case 3, and a groove bottom 26 of the annular groove 25. And an annular support target surface 27 that is in sliding contact with a later-described bearing surface 42 of the center plate 4.

  In the groove bottom 26 of the annular groove 25, an annular barrier wall 28 protruding from the groove bottom 26 toward the lower surface 24 is formed on the outer peripheral edge side of the support target surface 27. The barrier wall 28 surrounds a side surface 49 on the outer peripheral side of the center plate 4 disposed in the annular space 5. When a load is applied to the strut suspension, the lubricating grease filled in the annular space 5 is filled with the center plate 4. It serves to prevent the bearing surface 42 from being pushed radially outward.

  The lower case 3 is an insert-molded product in which a steel plate 7 as a reinforcing material is embedded in a resin molded body using a thermoplastic resin such as a polyamide resin, and the strut in a state in which a strut assembly of a strut suspension is inserted. The suspension is attached to an upper spring seat (not shown) which is a spring seat at the upper end of a coil spring (not shown) of the suspension.

  4A, 4B, and 4C are a plan view, a bottom view, and a front view of the lower case 3, and FIG. 4D is a lower case shown in FIG. 4A. FIG.

  As shown in the figure, the lower case 3 is formed on a cylindrical lower case body 31 having an insertion hole 30 for inserting a strut assembly and an upper surface 32 of the lower case body 31 facing the upper case 2. When the case 3 is rotatably combined with the upper case 2, an annular protrusion 33 that is inserted into the annular groove 25 formed in the lower surface 24 of the upper case body 21 of the upper case 2 to form the annular space 5; , And a flange 35 projecting radially outward from the side surface 34 of the lower case main body 31.

  A mounting surface 331 for mounting the center plate 4 is formed on the upper surface 330 of the annular protrusion 33, and the center mounted on the mounting surface 331 is disposed on the outer peripheral side of the mounting surface 331. A plurality of rotation stops 332 for preventing the rotation of the plate 4 are formed at equal intervals in the circumferential direction.

  The flange 35 projects radially outward from the outer peripheral side surface 34 of the lower case body 31 on the upper surface 32 side of the lower case body 31, and the lower surface 350 of the flange 35 is attached to the upper spring seat.

  The dust seal 6 is formed of an elastic body such as polyurethane resin or polyester elastomer, and is attached to the annular protrusion 33 of the lower case body 31 of the lower case 3 by insert molding (see FIG. 4). As shown in FIGS. 2A and 2B, the dust seal 6 is an outer seal portion that prevents a gap between the outer peripheral side wall surface 333 of the annular protrusion 33 and the outer peripheral side wall surface 250 of the annular groove 25 of the upper case 2. 60, and an inner seal portion 61 that prevents a gap between the inner peripheral side wall surface 334 of the annular protrusion 33 and the inner peripheral side wall surface 251 of the annular groove 25 of the upper case 2.

  The outer seal portion 60 is a cylindrical outer seal body 601 joined to the outer peripheral side wall surface 333 of the annular protrusion 33, and extends radially outward from the outer peripheral surface 603 of the outer seal body 601. And an annular outer lip portion 602 that contacts the outer peripheral side wall surface 250 of the groove 25 while being bent. On the outer peripheral side of the upper surface 32 of the lower case body 31, an annular outer seal mounting groove 320 is formed along the outer peripheral side wall surface 333 of the annular protrusion 33, and the lower case in the axial center O direction of the outer seal body 601. The end portion 604 on the 3 side is mounted in the outer seal mounting groove 320.

  The inner seal portion 61 extends radially inward from the cylindrical inner seal main body 611 joined to the inner peripheral side wall surface 334 of the annular protrusion 33 and the inner peripheral surface 613 of the inner seal main body 611. And an annular inner lip portion 612 that contacts the inner peripheral side wall surface 251 of the annular groove 25 of the case 2 while being bent. On the inner peripheral side of the upper surface 32 of the lower case body 31, an annular inner seal mounting groove 321 is formed along the inner peripheral side wall surface 334 of the annular protrusion 33, and the inner seal body 611 in the axis O direction. An end 614 on the lower case 3 side is mounted in the inner seal mounting groove 321.

  In the present embodiment, the dust seal 6 is attached to the annular protrusion 33 of the lower case body 31 of the lower case 3 by insert molding, but the lower case body 31 of the lower case 3 is bonded by an adhesive or other methods. The dust seal 6 may be attached to the annular protrusion 33.

  The center plate 4 is formed of a thermoplastic resin having excellent sliding characteristics, such as a polyolefin resin impregnated with a lubricating oil as necessary, and is mounted with an annular protrusion 33 provided on the lower case body 31 of the lower case 3. It is fixed to the mounting surface 331 and is in sliding contact with the support target surface 27 of the annular groove 25 provided in the upper case body 21 of the upper case 2. Thus, it functions as a bearing body that realizes free rotation between the upper case 2 and the lower case 3 while supporting the vehicle body load applied to the strut suspension transmitted to the upper case 2.

  5A, FIG. 5B and FIG. 5C are a plan view, a bottom view and a front view of the center plate 4, and FIG. 5D is a center plate shown in FIG. 5A. FIG. 5E is an enlarged view of the G part of the center plate 4 shown in FIG. 5A.

  As shown in the figure, the center plate 4 includes an annular center plate main body 40, a bearing surface 42 formed on the upper surface 41 of the center plate main body 40, and an axis O direction from the inner peripheral side of the lower surface 43 of the center plate main body 40. , And a plurality of rotation stoppers 45 formed at equal intervals in the circumferential direction and projecting radially outward from the lower surface 43 of the center plate main body 40.

  A large number of lubricating grease reservoirs 46 are formed on the bearing surface 42.

  The annular rib 44 is arranged so that the lower surface 43 of the center plate main body 40 and the mounting surface 331 of the annular protrusion 33 provided on the lower case main body 31 of the lower case 3 are in contact with each other so that the center plate 4 is placed on the lower case 3. Is inserted into the annular projection 33.

  The rotation stopper 45 is arranged so that the lower surface 43 of the center plate main body 40 and the mounting surface 331 of the annular protrusion 33 provided on the lower case main body 31 of the lower case 3 are in contact with each other so that the center plate 4 is placed on the lower case 3. The center plate 4 rotates relative to the lower case 3 by engaging in the circumferential direction with the gap 335 between the rotation stoppers 332 provided on the annular protrusion 33. To prevent.

  In the sliding bearing 1 according to the present embodiment having the above-described configuration, the center plate 4 is fixed to the mounting surface 331 of the annular protrusion 33 formed on the upper surface 32 of the lower case body 31 of the lower case 3, and the center plate 4 is in sliding contact with the support target surface 27 of the annular groove 25 formed in the lower surface 24 of the upper case body 21 of the upper case 2. For this reason, the center plate 4 is supported by the upper spring seat attached to the back surface 350 of the flange 35 of the lower case 3 and the coil spring of the strut suspension, and allows rotation between the upper case 2 and the lower case 3. The vehicle body load applied to the strut suspension transmitted to the upper case 4 is supported.

  The embodiment of the present invention has been described above.

  According to the present embodiment, the outer peripheral side wall surface 333 of the annular protrusion 33 provided on the lower case main body 31 of the lower case 3 and the outer case side wall 333 of the annular protrusion 33 and the upper case main body 21 of the upper case 2 are arranged. The outer seal body 601 of the outer seal portion 60 that closes the gap between the annular groove 25 and the outer peripheral side wall surface 250 of the annular groove 25 is joined, and the lower case of the lower case 3 along the outer peripheral side wall surface 333 of the annular protrusion 33. An outer seal mounting groove 320 is formed on the outer peripheral side of the upper surface 32 of the main body 31, and an end portion 604 on the lower case 3 side in the axial center O direction of the outer seal main body 601 is mounted in the outer seal mounting groove 320. Therefore, the outer seal body 601 of the outer seal portion 60 is prevented from being peeled off from the outer peripheral side wall surface 333 of the annular protrusion 33 provided on the lower case body 31 of the lower case 3, and the sealing performance of the annular space 5 is improved. It can be prevented from lowering. Therefore, it is possible to prevent the sliding performance from being lowered due to the intrusion of dust, muddy water or the like.

  Further, according to the present embodiment, the inner peripheral wall surface 334 of the annular protrusion 33 and the upper case 2 are connected to the inner peripheral wall surface 334 of the annular protrusion 33 provided on the lower case body 31 of the lower case 3. The inner seal main body 611 of the inner seal portion 61 that closes the gap between the annular groove 25 provided in the upper case main body 21 and the inner peripheral side wall surface 251 is joined, and along the inner peripheral side wall surface 334 of the annular protrusion 33. An inner seal mounting groove 321 is formed on the inner peripheral side of the upper surface 32 of the lower case main body 31 of the lower case 3, and an end 614 on the lower case 3 side in the direction of the axis O of the inner seal main body 611 is formed on the inner seal mounting groove. 321 is attached. For this reason, the inner seal body 611 of the inner seal portion 60 is prevented from peeling off from the inner peripheral side wall surface 334 of the annular protrusion 33 provided on the lower case body 31 of the lower case 3, thereby sealing the annular space 5. Can be more reliably prevented. Accordingly, it is possible to more reliably prevent a decrease in sliding performance due to the intrusion of dust, muddy water, and the like.

  Further, since the sliding bearing 1 according to the present embodiment has a large number of lubricating grease reservoirs 46 formed on the bearing surface 42 of the center plate 4, more lubricating grease can be held on the bearing surface 42. For this reason, the bearing surface 42 can be covered with a lubricating grease film, and the load of the vehicle body applied to the strut suspension can be supported for a longer period of time while allowing the strut assembly of the strut suspension to rotate smoothly. it can.

  The sliding bearing 1 according to the present embodiment is formed by combining the upper case 2 and the lower case 3 with the groove bottom 26 of the annular groove 25 formed on the lower surface 24 of the upper case body 21 of the upper case 2. An annular barrier 28 surrounding the side surface 49 on the outer peripheral side of the center plate 4 disposed in the annular space 5 is provided. The barrier wall 28 prevents the lubricating grease filled in the annular space 5 from being pushed radially outward from the bearing surface 41 of the center plate 4 when a load is applied to the strut suspension. Can be more reliably covered with a lubricating grease film. Therefore, the load of the vehicle body applied to the strut suspension can be supported for a longer period while allowing the strut assembly of the strut suspension to smoothly rotate.

  In addition, this invention is not limited to said embodiment, Many deformation | transformation are possible within the range of the summary.

  For example, in the above embodiment, the outer seal is formed on the outer peripheral side of the upper surface 32 of the lower case body 31 of the lower case 3 along the outer peripheral side wall surface 333 of the annular protrusion 33 provided on the lower case body 31 of the lower case 3. A mounting groove 320 is formed, and an end 604 on the lower case 3 side in the direction of the axis O of the outer seal body 601 is mounted in the outer seal mounting groove 320. However, the present invention is not limited to this. As shown in FIG. 6, an outer seal mounting groove 320 a is formed on the outer peripheral side of the upper surface 330 of the annular protrusion 33 along the outer peripheral side wall surface 333 of the annular protrusion 33, and the outer seal body 601 in the axis O direction. The outer side wall surface of the annular protrusion 33 provided on the lower case body 31 of the lower case 3 by attaching the end portion 605 on the upper case 3 side to the outer seal mounting groove 320a with a hook shape. Separation from 333 may be prevented.

  Further, in the above embodiment, along the inner peripheral side surface 334 of the annular protrusion 33 provided on the lower case main body 31 of the lower case 3 on the inner peripheral side of the upper surface 32 of the lower case main body 31 of the lower case 3. An inner seal mounting groove 321 is formed, and an end 614 on the lower case 3 side in the direction of the axis O of the inner seal body 611 is mounted in the inner seal mounting groove 321. However, the present invention is not limited to this. As shown in FIG. 6, an inner seal mounting groove 321 a is formed on the inner peripheral side of the upper surface 32 of the lower case body 31 along the inner peripheral side wall surface 334 of the annular protrusion 33, and the axis O of the inner seal body 611 is formed. The end portion 615 on the upper case 3 side in the direction is formed into a hook shape and is mounted in the inner seal mounting groove 321 a, so that the inner seal portion 61 is located inside the annular protrusion 33 provided on the lower case body 31 of the lower case 3. The peeling from the peripheral side wall surface 334 may be prevented.

  Moreover, in said embodiment, although the dust seal 6 in which the outer side seal part 60 and the inner side seal part 61 were integrally formed is used, this invention is not limited to this. The outer seal portion 60 and the inner seal portion 61 may be separate parts.

  Then, instead of attaching the outer seal portion 60 to the outer peripheral side wall surface 333 of the annular protrusion 33 provided in the lower case body 31 of the lower case 3, the outer periphery of the annular groove 25 provided in the upper case body 21 of the upper case 2. An outer seal portion may be attached to the side wall surface 250. In this case, the outer seal portion includes a cylindrical outer seal body joined to the outer peripheral side wall surface 250 of the annular groove 25 provided in the upper case main body 21 of the upper case 2, and a radially inner side from the inner peripheral surface of the seal main body. And an annular inner lip portion that contacts the outer peripheral side wall surface 333 of the annular protrusion 33 provided on the lower case main body 31 of the lower case 3. The outer seal mounting groove is formed on the lower surface 24 of the upper case main body 21 along the outer peripheral side wall surface 250 of the annular groove 25 provided in the upper case main body 21 of the upper case 2, and is the upper in the axial direction of the outer seal main body 21. The end on the case 2 side is inserted.

  Further, instead of attaching the inner seal portion 61 to the inner peripheral side wall surface 334 of the annular protrusion 33 provided in the lower case body 31 of the lower case 3, the annular groove 25 provided in the upper case body 21 of the upper case 2 is provided. An inner seal portion may be attached to the inner peripheral side wall surface 251. In this case, the inner seal portion includes a cylindrical inner seal body joined to the inner peripheral side wall surface 251 of the annular groove 25 provided in the upper case main body 21 of the upper case 2, and a radially outer side from the outer peripheral surface of the seal main body. And an annular outer lip portion that contacts the inner peripheral side wall surface 334 of the annular projection 33 provided on the lower case body 31 of the lower case 3. Further, the inner seal mounting groove is formed on the lower surface 24 of the upper case body 21 along the inner peripheral side wall surface 251 of the annular groove 25 provided in the upper case body 21 of the upper case 2, and in the axial direction of the inner seal body. The end part on the upper case 2 side is inserted.

  In the above embodiment, the outer seal portion 60 and the inner seal portion 61 are used. However, the outer seal portion 60 and the inner seal portion 61 may be used as long as they do not affect the intrusion of dust, muddy water, and the like into the annular space 5. One of these may be omitted.

  In the above embodiment, the center plate 4 is placed and fixed on the lower case 3. However, the center plate 4 may be placed so as to be rotatable with respect to the lower case 3. That is, like the upper surface 41 of the center plate 4, a bearing surface is formed on the lower surface 43 of the center plate 4, and this bearing surface is formed on the annular protrusion 33 formed on the upper surface 32 of the lower case body 31 of the lower case 3. The mounting surface 331 may be slidably contacted. In this case, in order to hold more lubricating grease on the bearing surface formed on the lower surface 43 of the center plate 4, a large number of lubricating grease reservoirs may be formed on the bearing surface.

  The sliding bearing of the present invention is widely applicable to sliding bearings that support the load applied to the shaft member while allowing the shaft member to rotate in various mechanisms including a strut suspension.

1: sliding bearing, 2: upper case, 3: lower case, 4: center plate, 5: annular space, 6: dust seal, 7: steel plate, 10: receiving hole of sliding bearing 1, 20: insertion of upper case 2 Hole: 21: upper case body, 22: upper surface of upper case body 21, 23: mounting surface of upper case body 21, 24: lower surface of upper case body 21, 25: annular groove of upper case body 21, 26: annular groove 25: Groove bottom 27: Support surface of upper case body 21 28: Wall of upper case body 21 30: Insertion hole of lower case 3 31: Lower case body 31, 32: Upper surface of lower case body 31 33: An annular protrusion of the lower case body 31, 34: A side surface of the lower case body 31, 35: A lower case body 31 40: Center plate body 41: Upper surface of center plate body 41 42: Bearing surface of center plate body 41 43: Lower surface of center plate body 41 44: Annular rib of center plate body 41 45: Center Rotation stop of plate body 41, 46: Lubricating grease reservoir of bearing surface 42, 49: Side surface on the outer peripheral side of the center plate 4, 60: Outer seal portion, 61: Inner seal portion, 320: Outer seal mounting groove, 321: Inner side Seal mounting groove, 330: upper surface of annular protrusion 33 of lower case body 31, 331: placement surface of lower case body 31, 332: rotation stop of lower case body 31, 333: annular protrusion 33 of lower case body 31 334: the inner peripheral side wall surface of the annular protrusion 33 of the lower case main body 31, 335: Clearance between the stoppers 332, 350: Back surface of the flange, 601: Outer seal body, 602: Outer lip portion, 604, 605: End portion of the outer seal body, 611: Inner seal body, 612: Inner lip portion : End of inner seal body

Claims (8)

An upper case,
A lower case that is rotatably combined with the upper case to form an annular space with the upper case;
An annular center plate disposed in the annular space;
An annular dust seal that closes the gap in the annular space;
The dust seal is
An axial end portion of the dust seal is inserted into a seal mounting groove having a recess formed on a surface of the lower case facing the upper case or a surface facing the lower case of the upper case. And sliding bearing. The sliding bearing according to claim 1,
The sliding bearing supports a load to be supported,
The upper case is
Having an annular groove formed on the surface facing the lower case;
The lower case is
Formed on a surface facing the upper case, and having an annular protrusion that forms the annular space by being inserted into the annular groove of the upper case,
The center plate is
The upper case and the lower case are allowed to rotate by being placed on the annular protrusion of the lower case and in sliding contact with a support target surface formed on the groove bottom of the annular groove of the upper case. While supporting the load of the support object applied to the upper case,
The seal mounting groove is
The lower case is formed on the surface of the lower case facing the upper case or the surface of the upper case facing the lower case along the side wall of the annular groove of the lower case or the annular groove of the upper case. Sliding bearing characterized by The sliding bearing according to claim 2,
The dust seal is
A cylindrical seal body joined to the outer peripheral side wall surface of the annular protrusion of the lower case;
An annular lip portion extending radially outward from the outer peripheral surface of the seal body and contacting an outer peripheral side wall surface of the annular groove of the upper case;
The seal mounting groove is
Along the outer peripheral side wall surface of the annular protrusion of the lower case, the lower case is formed on a surface facing the upper case, and the axial end of the seal body of the dust seal is inserted. Sliding bearing. The sliding bearing according to claim 2,
The dust seal is
A cylindrical seal body joined to the inner peripheral side wall surface of the annular protrusion of the lower case;
An annular lip portion extending radially inward from the inner peripheral surface of the seal body and contacting an inner peripheral side wall surface of the annular groove of the upper case;
The seal mounting groove is
The lower case is formed on the surface of the lower case facing the upper case along the inner peripheral side wall surface of the annular protrusion, and the axial end of the seal body of the dust seal is inserted. And sliding bearing. The sliding bearing according to claim 2,
The dust seal is
A cylindrical seal body joined to the outer peripheral side wall surface of the annular groove of the upper case;
An annular lip portion extending radially inward from the inner peripheral surface of the seal body and in contact with the outer peripheral side wall surface of the annular protrusion of the lower case,
The seal mounting groove is
Along the outer peripheral side wall surface of the annular groove of the upper case, the upper case is formed on the surface facing the lower case, and the axial end of the seal body of the dust seal is inserted. Plain bearing. The sliding bearing according to claim 2,
The dust seal is
A cylindrical seal body joined to the inner peripheral side wall surface of the annular groove of the upper case;
An annular lip portion extending radially outward from the outer peripheral surface of the seal body and in contact with an inner peripheral side wall surface of the annular protrusion of the lower case,
The seal mounting groove is
Along the inner peripheral side wall surface of the annular groove of the upper case, the upper case is formed on a surface facing the lower case, and the axial end of the seal body of the dust seal is inserted. Sliding bearing. A sliding bearing according to any one of claims 2 to 6,
The dust seal is
A slide bearing characterized in that it is joined to a side wall of the annular protrusion of the lower case or the annular groove of the upper case by insert molding. A sliding bearing according to any one of claims 1 to 7,
The sliding bearing supports the load of the vehicle body applied to the strut suspension while allowing the strut assembly of the strut suspension to rotate.
The upper case is attached to a mounting mechanism of the strut assembly to the vehicle body in a state where the strut assembly is inserted,
The lower case is attached to a spring seat at an upper end portion of a coil spring combined with the strut assembly in a state where the strut assembly is inserted,
The slide bearing according to claim 1, wherein the center plate is disposed in the annular space in a state where the strut assembly is inserted.

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