JP6807284B2 - Bearing equipment - Google Patents

Description

The present invention relates to a bearing device that supports a vehicle body load applied to a suspension having a shock absorber and a coil spring, and more particularly to a spring seat of the bearing device that functions as a spring seat of the coil spring.

The strut suspension (MacPherson strut) used for the front wheels of automobiles is equipped with a shock absorber and a coil spring arranged around the shock absorber, and the coil spring attaches the strut suspension to the vehicle body by steering operation. It rotates relative to the upper mount of. Therefore, a thrust bearing device is usually arranged between the upper mount and the coil spring in order to support the load applied to the strut suspension while smoothly allowing this relative rotation.

For example, Patent Document 1 includes bearings such as rolling bearings and slide bearings as thrust bearing devices for strut type suspensions, and synthetic resin spring seats (cups) that function as spring seats for coil springs. Thrust bearing devices are disclosed. In this thrust bearing device, the spring seat has an upper surface including a contact portion with a lower surface of the bearing and a lower surface including an annular support portion for supporting an upper end portion of the coil spring. The contact portion with the lower surface of the bearing is composed of radial, circular, concentric and other ribs. In addition, the spring seat has an annular support portion, and further has an annular folded portion that forms a cylindrical accommodating portion for accommodating the upper end portion of the rubber bump stopper inside the support portion. A discharge orifice is formed in the folded portion to discharge the liquid accumulated on the upper surface side to the lower surface side. Further, the spring seat has a lug that engages with the outer skirt portion of the bearing upper case (protective cover) to form a labyrinth seal.

Special Table 2016-532064

However, in the bearing device described in Patent Document 1, since the bearing and the spring seat are only engaged in the axial direction by the outer peripheral skirt portion of the upper case of the bearing and the lug of the spring seat, the axial circumference is relative. It is rotatable to. Then, when both are relatively rotated, there is a problem that the contact portion between the lower surface of the bearing and the upper surface of the spring seat slides, causing wear of the spring seat made of synthetic resin.

The present invention has been made in view of the above circumstances, an object thereof is to provide a shaft receiving device that can be suppressed wear of the spring seat.

In order to solve the above problems, the present invention, the synthetic resin spring seat, penetrates the upper and lower surfaces, to form a mounting hole for mounting the bearing, the inner peripheral surface of the mounting hole, the circumferential direction A plurality of guide grooves arranged side by side were formed along the axis. Here, the groove depth of at least one guide groove may be made shallower from the upper surface side to the lower surface side.

For example , the bearing device of the present invention
A bearing device that supports a load applied to a suspension having a shock absorber and a coil spring.
A spring seat made of synthetic resin that functions as a spring seat of the coil spring, and
It is provided with a bearing which is arranged between the upper mount for attaching the suspension to the vehicle body and the spring seat and allows the spring seat to rotate relative to the upper mount.
The spring seat is
The upper surface located on the upper mount side for attaching the suspension to the vehicle body,
The lower surface located on the coil spring side and
A support portion formed on the lower surface and supporting the upper end portion of the coil spring, and a support portion.
It is provided with a mounting hole that penetrates the upper surface and the lower surface and mounts a bearing.
On the inner peripheral surface of the mounting hole,
A plurality of guide grooves arranged side by side in the circumferential direction are formed along the axis.
The bearing is
A plurality of times formed on the outer peripheral surface of the bearing in a circumferential direction and inserted into the guide groove formed on the inner peripheral surface of the mounting hole when mounted in the mounting hole of the spring seat. Has a stop.

In the present invention, a plurality of guide grooves arranged side by side in the circumferential direction are formed along the axial center on the inner peripheral surface of the mounting hole in which the bearing of the spring seat is mounted. Therefore, it is possible to prevent the bearing from rotating with respect to the spring seat by providing a detent that is inserted into the guide groove when the bearing is mounted in the mounting hole of the spring seat on the outer peripheral surface of the bearing. .. Therefore, according to the present invention, wear of the spring seat can be suppressed. Further, if the bearing is made of synthetic resin, wear of the bearing can be suppressed.

Here, by making the groove depth of at least one guide groove shallower from the upper surface side toward the lower surface side, the rotation stopper inserted into the guide groove becomes a squeeze with respect to the guide groove, thereby bearing the bearing. Is fixed to the spring seat, and rattling between the spring seat and the bearing can be prevented. Therefore, in this case, it is possible to further prevent the generation of abnormal noise.

1 (A), 1 (B) and 1 (C) are a plan view, a bottom view and a front view of the bearing device 1 according to the embodiment of the present invention, and FIG. 1 (D) is a front view. It is a cross-sectional view of AA of the bearing device 1 shown in FIG. 1 (A). 2 (A) and 2 (B) are a plan view and a bottom view of the spring seat 2, and FIGS. 2 (C) and 2 (D) are BB of the spring seat 2 shown in FIG. 2 (A). It is a sectional view and CC sectional view. 3 (A), 3 (B) and 3 (C) are a plan view, a bottom view and a front view of the slide bearing 3, and FIG. 3 (D) is a slide bearing shown in FIG. 3 (A). 3 is an enlarged view of a DD cross section of No. 3. FIG. 4 is a schematic cross-sectional view of a strut suspension 4 to which the bearing device 1 according to the embodiment of the present invention is applied.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

1 (A), 1 (B) and 1 (C) are a plan view, a bottom view and a front view of the bearing device 1 according to the present embodiment, and FIG. 1 (D) is FIG. 1 (D). It is a cross-sectional view of AA of the bearing apparatus 1 shown in A).

The bearing device 1 according to the present embodiment is a device for supporting a load applied to the strut suspension 4 (see FIG. 4) while allowing rotation around an axis, and as shown in the figure, a spring seat 2 and a bearing device 1 , A slide bearing 3 mounted on the spring seat 2 and the like.

2 (A) and 2 (B) are a plan view and a bottom view of the spring seat 2, and FIGS. 2 (C) and 2 (D) are BB of the spring seat 2 shown in FIG. 2 (A). It is a sectional view and CC sectional view.

The spring seat 2 is formed of a high-strength thermoplastic resin such as a glass-containing polyamide resin, and as shown, the upper surface 20 including an annular mounting surface 200 on which the slide bearing 3 is mounted and the strut type suspension 4 A lower surface 21 including an annular support surface 210 that supports the upper end of the coil spring 42 (see FIG. 4) and an upper end of the bump stopper 43 (see FIG. 4) of the strut suspension 4 formed on the lower surface 21. It is provided with a tubular accommodating portion 22.

On the upper surface 20, a plurality of ribs 201 are formed radially around the mounting surface 200, whereby a meat steal 202 is formed between the adjacent ribs 201. In FIG. 2, only some of the ribs 201 and the meat theft 202 are coded.

In the center of the upper surface 20, a mounting hole 23 for mounting the lower case 31 described later of the slide bearing 3 penetrates the lower surface 21 and is formed so that the accommodating portion 22 and the axis O coincide with each other.

The inner peripheral surface 230 of the mounting hole 23 has a guide groove 231 having a constant groove depth d1 along the axis O, and a tapered guide whose groove depth d2 becomes shallower from the upper surface 20 side to the lower surface 21 side. A plurality of grooves 232 are alternately formed at equal intervals in the circumferential direction. The rotation stopper 314 of the lower case 31, which will be described later, of the slide bearing 3 is inserted into the guide groove 231 and the tapered guide groove 232. As a result, it is possible to prevent the lower case 31 from rotating with respect to the mounting surface 200 of the spring seat 2 and prevent the lower case 31 and the spring seat 2 from being worn due to sliding between them. Further, the rotation stopper 314 inserted into the tapered guide groove 232 becomes a mesh with respect to the tapered guide groove 232, so that the lower case 31 is fixed to the spring seat 2 and between the spring seat 2 and the slide bearing 3. It is possible to prevent the generation of abnormal noise due to rattling. In FIG. 2, only some of the guide grooves 231 and the tapered guide grooves 232 are designated by reference numerals.

On the bottom surface 203 of the meat steal 202, a drain hole 204 for draining the liquid accumulated in the meat steal 202 is formed through the end surface 220 of the accommodating portion 22. The drainage hole 204 has a small diameter portion 205 formed on the bottom surface 203 side of the meat stealing 202, and a large diameter portion 206 having an inner diameter larger than the small diameter portion 205 and formed on the end surface 220 side of the accommodating portion 22.

The small diameter portion 205 is tapered so that the inner diameter becomes smaller as it approaches the end face 220 side of the accommodating portion 22, and the large diameter portion 206 is tapered so that the inner diameter becomes smaller as it approaches the bottom surface 203 side of the meat steal 202. Is attached. Then, the two are connected to each other with their axes (the axis C1 of the small diameter portion 205 and the axis C2 of the large diameter portion 206) deviated from each other.

In the drain hole 204, the inner diameter of the small diameter portion 205 located on the bottom surface 203 side of the meat steal 202 is made smaller than the inner diameter of the large diameter portion 206 located on the end surface 220 side of the accommodating portion 22, and the axis C1 of the small diameter portion 205 Since the axis C2 of the large diameter portion 206 is displaced, the lower side (end surface of the accommodating portion 22) does not have to be small enough to affect the drainage property of the liquid accumulated in the meat steal 202. It is possible to weaken the momentum of the water entering the large diameter portion 206 from the 220 side) and prevent the liquid from entering the meat steal 202 from the lower side.

A plurality of inwardly projecting protrusions 222 are formed on the inner peripheral surface 221 of the accommodating portion 22 at equal intervals in the circumferential direction. The protrusion 222 presses the bump stopper 43 housed in the housing 22 inward in the radial direction to fix the bump stopper 43. Further, corresponding to the individual protrusions 222, the upper surface 20 is formed with a window hole 207 that penetrates to the lower surface 21 and accommodates the protrusion 222 in the frame in a virtual plane perpendicular to the axis O. By providing the window hole 207 corresponding to each protrusion 222, the protrusion 222 is formed without a slide mold by using two molds (upper mold and lower mold) that move relative to the axial center O direction. can do.

3 (A), 3 (B) and 3 (C) are a plan view, a bottom view and a front view of the slide bearing 3, and FIG. 3 (D) is a slide bearing shown in FIG. 3 (A). 3 is an enlarged view of a DD cross section of No. 3.

As illustrated, the sliding bearing 3, the upper case 30 of the annular, with the piston rod 40 of the shock absorber 41 that constitute the strut suspension 4 is inserted, the upper case 3 0 and rotatably combined is cylindrical The lower case 31 is provided with an annular center plate 32 and a metal washer 33 arranged between the upper case 30 and the lower case 31.

The upper case 30 is made of a high-strength thermoplastic resin such as a glass-containing polyamide resin, and the upper surface 300 thereof has a mounting surface 301 on the upper mount 5 (see FIG. 4) for mounting the strut suspension 4 on the vehicle body. Is formed. Further, the lower surface 302 of the upper case 30, mounting holes 303 for mounting the metal washer 33 is formed through the top surface 30 0, around the mounting hole 303 of the lower surface 302, upper surface of the metal washer 33 An annular lower surface 304 that comes into contact with the 330 is formed.

The piston rod 40 of the shock absorber 41 constituting the strut suspension 4 is inserted into the lower case 31. The lower case 31 is formed of a thermoplastic resin having excellent sliding characteristics, such as a polyacetal resin impregnated with lubricating oil, if necessary, and an annular upper surface 311 on which a center plate 32 is placed is placed on the upper end surface 310 thereof. Is formed.

The outer peripheral surface 312 of the lower case 31 is formed with a flange portion 313 that comes into contact with the mounting surface 200 of the upper surface 20 of the spring seat 2 when the sliding bearing 3 is mounted on the spring seat 2. Further, when the slide bearing 3 is mounted on the spring seat 2, the outer peripheral surface 312 is inserted into the guide groove 231 or the tapered guide groove 232 formed on the inner peripheral surface 230 of the mounting hole 23 of the spring seat 2. A plurality of bearing stoppers 314 are formed at equal intervals in the circumferential direction.

The center plate 32 is made of a resin having excellent sliding characteristics such as polyethylene and a thermoplastic polyester elastomer, and is arranged between the annular lower surface 304 of the upper case 30 and the annular upper surface 311 of the lower case 31. As a result, the upper case 30 and the lower case 31 rotate relative to each other via the center plate 32.

The metal washer 33 is arranged between the annular lower surface 304 of the upper case 30 and the upper surface 320 of the center plate 32, and the piston rod 40 of the shock absorber 41 constituting the strut suspension 4 is inserted. Washers 33 are steel, steel, such as stainless steel or a copper alloy, it is formed of a nonferrous alloy plate such as a titanium alloy, in its upper surface 330, a cylindrical boss which is attached to the attachment hole 303 of the upper casing 3 0 331 is formed.

Next, an application example of the bearing device 1 according to the present embodiment will be described.

FIG. 4 is a schematic cross-sectional view of the strut suspension 4 to which the bearing device 1 according to the present embodiment is applied.

As shown in the figure, the bearing device 1 according to the present embodiment is attached to a strut suspension 4 of an automobile provided with, for example, a shock absorber 41 and a coil spring 42 arranged around the shock absorber 41. The strut suspension 4 to which the bearing device 1 is attached is attached to a vehicle body (not shown) via an upper mount 5.

The shock absorber 41 includes a piston rod 40 and a bump stopper 43 arranged so as to surround the piston rod 40.

The upper mount 5 is composed of an elastic member 50 such as rubber in which a core metal 51 is embedded, and accommodates the slide bearing 3 so as to be in contact with the mounting surface 301 of the upper case 30 of the slide bearing 3.

The bearing device 1 composed of the spring seat 2 and the slide bearing 3 is arranged between the upper mount 5 and the coil spring 42, and the support surface 210 of the spring seat 2 is provided with the piston rod 40 inserted into the slide bearing 3. While supporting the upper end portion of the coil spring 42, the accommodating portion 22 of the spring seat 2 accommodates the upper end portion of the bump stopper 43.

The piston rod 40 is integrally formed with the large diameter portion 400 inserted into the lower case 31 of the slide bearing 3 and the large diameter portion 400, and is inserted into the metal washer 33 with a smaller diameter portion smaller than the large diameter portion 400. It includes a 401 and a threaded portion 402 formed on the small diameter portion 401.

The large-diameter portion 400 of the piston rod 40 is in rotatably contacting the inner peripheral surface 315 of the lower case 31 in the circumferential direction R.

A nut 6 is screwed into the threaded portion 402 of the small diameter portion 401 of the piston rod 40. The nut 6 is screwed into the screw portion 402 and fixed to the piston rod 40, and is housed in the upper mount 5 so as not to rotate in the circumferential direction R with respect to the upper mount 5.

The metal washer 33 of the slide bearing 3 is sandwiched between the stepped surface 403 formed between the large diameter portion 400 and the small diameter portion 401 of the piston rod 40 and the nut 6 screwed into the threaded portion 402. There is.

In the slide bearing 3, the upper case 30 is pushed to the upper mount 5 by the metal washer 33 fixed to the stepped surface 403 of the piston rod 40 by attaching the strut suspension 4 to the upper mount 5 via the slide bearing 3. You can guess. As a result, the relative rotation between the upper case 30 and the metal washer 33 is prevented, and the upper case 30 is held by the upper mount 5 so as not to rotate in the circumferential direction R with respect to the piston rod 40. On the other hand, the lower case 31 is attached to the spring seat 2 in a state where the relative rotation between the lower case 31 and the spring seat 2 is prevented, and rotates in the circumferential direction R according to the spring seat 2.

In the strut type suspension 4 having the above configuration, when the coil spring 42 rotates in the circumferential direction R around the axis O by a steering operation, the spring seat 2 supporting the coil spring 42 and the lower case 31 of the sliding bearing 3 also have a coil spring. It rotates in the circumferential direction R together with 42. On the other hand, the metal washer 33 and the upper case 30 of the slide bearing 3 are held by the upper mount 5 so as not to rotate in the circumferential direction R with respect to the piston rod 40, and as a result, the metal washer in the slide bearing 3 is held. A relative rotation in the circumferential direction R occurs between the 33 and the upper case 30 and the lower case 31. This relative rotation is smoothly performed by the center plate 32 arranged between the annular upper surface 311 of the lower case 31 and the metal washer 33, whereby the steering operation is also performed without resistance.

In this way, the bearing device 1 allows the coil spring 42 to rotate in the circumferential direction R with respect to the upper mount 5 by the slide bearing 3, and the spring seat 2 makes the strut suspension 4 via the coil spring 42. Supports the applied vehicle body load.

The embodiment of the present invention has been described above.

In the present embodiment, a guide groove 231 having a constant groove depth d1 is formed on the inner peripheral surface 230 of the mounting hole 23 of the spring seat 2 along the axial center O, and a groove is formed from the upper surface 20 side toward the lower surface 21 side. A plurality of tapered guide grooves 232 having a shallow depth d2 are provided alternately at equal intervals in the circumferential direction, and the guide grooves 231 and the tapered guide grooves 232 are provided with a rotation stop 314 of the lower case 31 of the slide bearing 3. Is being inserted. As a result, according to the present embodiment, the lower case 31 is prevented from rotating with respect to the mounting surface 200 of the spring seat 2, and the lower case 31 and the spring seat 2 are worn by sliding between them. Can be prevented. Further, the rotation stopper 314 inserted in the tapered guide groove 232 becomes a mesh with respect to the tapered guide groove 232, so that the lower case 31 is fixed to the spring seat 2 and between the spring seat 2 and the slide bearing 3. It is possible to prevent the generation of abnormal noise due to rattling.

Further, in the present embodiment, a plurality of ribs 201 are formed radially around the mounting surface 200 of the spring seat 2, and meat stealing 202 is provided between the adjacent ribs 201. As a result, the weight can be reduced while maintaining the strength of the spring seat 2.

Further, in the present embodiment, the bump stopper 43 accommodated in the accommodating portion 22 is fixed by the protruding portion 222 provided on the inner peripheral surface 221 of the accommodating portion 22 of the spring seat 2, so that the accommodating portion of the spring seat 2 It is not necessary to set the inner diameter of 22 to the outer diameter of the bump stopper 43 over the entire circumference. Therefore, as compared with the case where the inner diameter of the accommodating portion 22 is set to be squeezed over the entire circumference, the pressure required when inserting the upper end portion of the bump stopper 43 into the accommodating portion 22 of the spring seat 2 is reduced to reduce the resistance. It can be made smaller. Therefore, according to the present embodiment, the workability of the mounting work on the bump stopper 43 can be improved.

Further, in the present embodiment, a window hole that penetrates the upper surface of the spring seat 2 to the lower surface 21 corresponding to each protrusion 222 and accommodates the protrusion 222 in the frame in a virtual plane perpendicular to the axis O. 207 is provided. Therefore, the protrusion 222 can be formed without the slide mold by using two molds (upper mold and lower mold) that move relative to the axial center O direction. Therefore, according to the present embodiment, the workability of the mounting work on the bump stopper 43 can be improved without increasing the cost.

Further, in the present embodiment, a drain hole 204 for draining the liquid accumulated in the meat steal 202 is provided on the bottom surface 203 of the meat steal 202 of the spring seat 2, and in this drain hole 204, the meat steal 202 The axis C1 of the small diameter portion 205 located on the bottom surface 203 side and the axis C2 of the large diameter portion 206 located on the end surface 220 side of the accommodating portion 22 are offset from each other. Therefore, water that invades the large diameter portion 206 from the lower side (end surface 220 side of the accommodating portion 22) without reducing the inner diameter of the small diameter portion 205 so as to affect the drainage property of the liquid accumulated in the meat steal 202. It is possible to weaken the momentum of the meat and prevent the liquid from entering the meat steal 202 from below. Therefore, according to the present embodiment, it is possible to prevent the liquid from entering from the lower side while maintaining the discharge property of the liquid accumulated in the meat steal 202.

In addition, in the drain hole 204, the small diameter portion 205 is tapered so that the inner diameter becomes smaller as it approaches the end face 220 side of the accommodating portion 22, and the large diameter portion 206 is tapered so that the inner diameter becomes smaller as it approaches the bottom surface 203 side of the meat steal 202. Is tapered so that Therefore, it is possible to more effectively prevent the intrusion of the liquid from the lower side while maintaining the discharge property of the liquid accumulated in the meat steal 202.

Further, unlike the spring seat described in Patent Document 1, the spring seat 2 of the present embodiment does not have an annular folded portion, so that the strength of the spring seat 2 can be prevented from decreasing.

The present invention is not limited to the above-described embodiment, and many modifications can be made within the scope of the gist thereof.

For example, in the above embodiment, a plurality of guide grooves 231 and tapered guide grooves 232 are alternately formed on the inner peripheral surface 230 of the mounting hole 23 of the spring seat 2 at equal intervals in the circumferential direction, and the guide grooves 231 and the tapered guide grooves 232 are alternately formed at equal intervals in the circumferential direction. Therefore, a plurality of rotation stoppers 314 are formed on the outer peripheral surface 312 of the lower case 31 of the slide bearing 3 at equal intervals in the circumferential direction, but the present invention is not limited to this. The guide groove 231 and the tapered guide groove 232 may be formed on the inner peripheral surface 230 of the mounting hole 23 of the spring seat 2 so as to be aligned in the circumferential direction, and the rotation stopper 314 is also a slide bearing. A plurality of lower cases 31 may be formed on the outer peripheral surface 312 of the lower case 31 side by side in the circumferential direction. Further, the tapered guide groove 232 may be omitted. Even in this case, it is possible to prevent the lower case 31 from rotating with respect to the mounting surface 200 of the spring seat 2 and prevent the lower case 31 and the spring seat 2 from being worn due to sliding between them. ..

Further, in the above embodiment, in the drain hole 204, the inner diameter of the upper portion (small diameter portion 205) located on the bottom surface 203 side of the meat steal 202 is located on the end surface 220 side of the accommodating portion 22 (large diameter portion 206). Although it is smaller than the inner diameter of, the present invention is not limited to this. The inner diameters of both may be the same, or the inner diameter of the upper part may be larger than the inner diameter of the lower part. Further, the drainage hole 204 does not have to be a circular hole, and may have another shape such as a square hole.

Further, in the above embodiment, the upper end portion of the coil spring 42 is in direct contact with the support surface 210 of the spring seat 2, but the lower surface 21 of the spring seat 2 or the lower surface 21 of the spring seat 2 and the accommodating portion 22. A cushioning material made of rubber, elastoma, or the like that covers the outer peripheral surface may be provided, and the upper end portion of the coil spring 42 may be brought into contact with the support surface 210 of the spring seat 2 via the cushioning material. In this case, the cushioning material may be integrated with the spring seat 2 or may be separate.

Further, in the above embodiment, the case where the slide bearing 3 is used as the bearing to be combined with the spring seat 2 has been described as an example, but the present invention is not limited to this. The bearing may be a rolling bearing, for example, as long as it can allow the coil spring 42 to rotate in the circumferential direction R with respect to the upper mount 5. In this case, instead of the center plate 32, a plurality of rolling members such as balls and rollers function as shaft members.

Further, the present invention is not limited to the strut type suspension, and can be widely applied to a bearing device that supports a load applied to a suspension having a shock absorber and a coil spring.

1: Bearing device, 2: Spring seat, 3: Sliding bearing, 4: Strut type suspension, 5: Upper mount, 6: Nut, 20: Upper surface of spring seat 2, 21: Lower surface of spring seat 2, 22: Spring seat 2 accommodating part, 23: Spring seat 2 mounting hole, 30: Upper case, 31: Lower case, 32: Center plate, 33: Metal washer, 40: Piston rod, 41: Shock absorber, 42: Coil spring, 43 : Bump stopper, 50: Elastic member, 51: Core metal, 200: Mounting surface, 201: Rib, 202: Meat steal, 203: Bottom of meat steal 202, 204: Drain hole, 205: Small diameter part of drain hole 204 , 206: Large diameter portion of drain hole 204, 207: Window hole, 210: Support surface of spring seat 2, 220: End surface of accommodating portion 22, 221: Inner peripheral surface of accommodating portion 22, 222: Projection of spring seat 2. Part, 230: Inner peripheral surface of mounting hole 23, 231: Guide groove of spring seat 2, 232: Tapered guide groove of spring seat 2, 300: Upper surface of upper case 30, 301: Mounting surface of upper case 30, 302 : Lower surface of upper case 30, 303: Mounting hole of upper case 30, 304: Ring lower surface of upper case 30, 310: Upper end surface of lower case 31, 311: Circular upper surface of lower case 31, 312: Outer circumference of lower case 31 Surface, 313: Flange portion of lower case 31, 314: Rotation stop of lower case 31, 315: Inner peripheral surface of lower case 31, 320: Upper surface of center plate 32, 330: Upper surface of metal washer 33, 331: Metal washer 33 boss part, 400: large diameter part of piston rod 40, 401: small diameter part of piston rod 40, 402: threaded part of piston rod 40, 403: stepped surface of piston rod 40

Claims (3)

A bearing device that supports a load applied to a suspension having a shock absorber and a coil spring.
A spring seat made of synthetic resin that functions as a spring seat of the coil spring, and
It is provided with a bearing which is arranged between the upper mount for attaching the suspension to the vehicle body and the spring seat and allows the spring seat to rotate relative to the upper mount.
The spring seat is
The upper surface located on the upper mount side for attaching the suspension to the vehicle body,
The lower surface located on the coil spring side and
A support portion formed on the lower surface and supporting the upper end portion of the coil spring, and a support portion.
It is provided with a mounting hole that penetrates the upper surface and the lower surface and mounts a bearing.
On the inner peripheral surface of the mounting hole,
A plurality of guide grooves arranged side by side in the circumferential direction are formed along the axis.
The bearing is
A plurality of times formed on the outer peripheral surface of the bearing so as to be arranged in the circumferential direction and inserted into the guide groove formed on the inner peripheral surface of the mounting hole when mounted in the mounting hole of the spring seat. A bearing device characterized by having a stopper. The bearing device according to claim 1.
A bearing device having at least one of the plurality of guide grooves provided in the spring seat, wherein the groove depth becomes shallower from the upper surface side to the lower surface side. The bearing device according to claim 1 or 2.
The spring seat is a bearing device characterized by further having a plurality of ribs formed radially on the upper surface thereof.

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