JP2013122252A - Strut mount - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a strut mount capable of preventing generation of abnormal noise such as hitting or rubbing noise with a simple structure.SOLUTION: A separation surface 24A, mounting raised surface 24B and receiving surface 24D are formed in a flange 24. The mounting raised surface 24B forms a convex surface that protrudes up more than the separation surface 24A. The separation surface 24A is disposed downward more than the mounting raised surface 24B, and separately disposed from a vehicle body side panel 60.

Description

  The present invention relates to a strut mount for mounting a shock absorber constituting a vehicle suspension mechanism on a vehicle body, and more particularly, an input separation type in which a piston rod of a shock absorber is elastically supported independently of a suspension spring with respect to a vehicle side body. The present invention relates to a strut mount that is preferably used in the suspension system of the above.

  In vehicles such as automobiles, in order to suppress vibration input from wheels from being transmitted to the vehicle body via the suspension device, the suspension device and the vehicle body panel are connected via a strut mount. .

  FIG. 7 shows an example of a suspension device and a strut mount, where 100 is a wheel disk, 102 is a suspension device, 104 is a lower arm, 106 is a shock absorber in the suspension device 102, 108 is a coil spring, and 110 is a strut mount. The suspension device 102 is connected to the vehicle body panel via the strut mount 110 (see Patent Document 1).

  The strut mount 110 includes an inner member 111, a metal outer cylinder member 115 disposed around the inner member 111, and a rubber member 113 disposed therebetween and bonded thereto, and the outer cylinder member 12 includes The flange portion 112 is made of metal and protrudes integrally outward in the radial direction. The flange portion 112 is connected to the vehicle body panel by a fastening bolt 114.

Accordingly, the vehicle body panel surface and the upper surface of the flange portion 112 are in contact with each other.

By the way, since various vibrations are generated when the vehicle travels and vibrations are transmitted to the strut mount mounting portion, for example, when vibrations are transmitted to the vehicle body panel, the vehicle body panel is a plate material or the like by press working. In other words, the vehicle body panel may bend due to vibration, and in particular, a slight gap may be generated between the mounting surface between one bolt fastening portion of the flange portion 112 and the other bolt fastening portion. Due to this, there is a possibility that abnormal sounds such as a hitting sound and a rubbing sound may be generated when the surfaces that are separated from each other come into contact with each other.

  Therefore, as a first measure for preventing this, in Patent Document 1, a thin plate-like elastic noise suppressing member 116 is attached to the mounting surface of the flange portion 112 facing the vehicle body panel using a double-sided tape, After preventing a vehicle body panel and the flange part 112 from contacting directly, these were fastened with the volt | bolt.

  Further, as a second measure for preventing the abnormal noise, a method of adhering and pressing ring-shaped vulcanized rubber to the flange portion 112 mounting surface using an adhesive or the like, or as a third measure, attaching the flange portion 112 A method of extending the rubber member to the surface and vulcanizing and bonding the rubber to the entire mounting surface has also been performed.

  However, in the above-described strut mount 110, the first measure, that is, the measure to stick the elastic noise suppressing member 116 to the mounting surface using the double-sided tape, is to attach the double-sided tape so that wrinkles do not occur. On the other hand, the second method, that is, the method of vulcanizing and bonding the rubber member to the mounting surface, takes time to position the vulcanized rubber member so as not to protrude from the mounting surface. . Further, the third measure has a problem that it is difficult to uniformly spread a thin rubber on the mounting surface and to reliably vulcanize and bond it over the entire surface. There has been a demand for a strut mount that can prevent such noise while solving such problems.

JP 2009-264511 A

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a strut mount that can prevent occurrence of abnormal sounds such as a hitting sound and a rubbing sound with a simple configuration.

  In order to achieve the above object, a strut mount according to claim 1 of the present invention includes an inner mounting member to which a piston rod of a shock absorber is attached, and a cylindrical outer tube portion disposed on the outer peripheral side of the inner mounting member. And a mounting projection surface that is formed integrally with the outer cylinder portion, extends radially outward from one end of the outer cylinder portion, and is attached at a plurality of locations while abutting on the vehicle body side panel with a flat surface. A spaced-apart surface portion that is continuously formed with the mounting projection surface portion and is retracted from the vehicle body side panel with respect to the mounting projection surface portion, and spaced apart from the vehicle body side panel, and is flush with the outer periphery of the outer cylinder portion An outer mounting member having a flange portion that is formed in an annular shape and has a receiving surface portion on which a spring or a bearing of a shock absorber is disposed, and is disposed between the inner mounting member and the outer mounting member Is provided with a rubber elastic body for connecting the two, a.

  In the strut mount according to the first aspect, the inner attachment member is attached to the piston rod of the shock absorber, and the outer attachment member is attached to the vehicle body side panel. The flange portion constituting the outer mounting member is formed integrally with the outer cylinder portion, and extends radially outward from one end of the outer cylinder portion, and has a mounting projection surface portion, a separation surface portion, and a receiving surface portion. Yes. The mounting protrusions are flush with each other and are mounted at a plurality of locations while abutting the vehicle body side panel with a flat surface. The separation surface portion is formed continuously with the attachment projection surface portion, is disposed at a position retracted from the vehicle body side panel with respect to the attachment projection surface portion, and is separated from the vehicle body side panel.

  By forming the separation surface portion in this way, a portion where the flange portion and the vehicle body side panel are separated from each other in advance is provided, so that even if the flange portion or the vehicle body side panel is bent and deformed due to vibration, the contact is made. Thus, it is possible to suppress the generation of abnormal sounds such as a hitting sound and a rubbing sound.

  In addition, since the receiving surface is formed in a flat and annular shape, the load is not applied as compared with the case where a step is formed instead of being flush, and the spring or bearing of the shock absorber is stably received. be able to. In addition, this can also suppress the generation of abnormal noise.

  The strut mount according to a second aspect of the present invention is characterized in that the spacing surface portion is formed at least on an outer peripheral edge of the flange portion.

  Thus, by forming the separation surface portion on the outer peripheral edge of the flange portion, it is possible to effectively suppress the generation of abnormal noise.

  In the strut mount according to a third aspect of the present invention, an upper stopper that protrudes upward from the mounting projecting surface portion is integrated continuously from the upper end of the outer cylinder portion in the cylinder axis direction on the radially inner side of the flange portion. It is characterized by being bent.

  According to the above configuration, by forming the upper stopper integrally, the stopper can be easily formed with a simple configuration without increasing the number of parts.

  In the strut mount according to a fourth aspect of the present invention, a lower stopper that is continuously bent radially outward from the outer cylinder portion is integrally formed at the lower end in the cylinder axis direction of the outer cylinder portion. It is characterized by that.

  According to the above configuration, by forming the lower stopper integrally, the stopper can be easily formed with a simple configuration without increasing the number of parts.

  The strut mount according to a fifth aspect of the present invention is characterized in that the outer cylinder portion has a tapered shape with a smaller diameter toward the lower side.

  When the lower stopper is formed integrally with the lower end of the outer cylinder part, the diameter of the lower stopper can be reduced by forming the outer cylinder part into a tapered shape having a smaller diameter toward the lower side. Thus, the diameter of the portion that restricts relative movement can be reduced.

  As described above, according to the strut mount of the present invention, it is possible to prevent the generation of abnormal sounds such as a hitting sound and a rubbing sound with a simple configuration.

It is sectional drawing which shows the strut mount which concerns on 1st Embodiment. It is a perspective view of the strut mount concerning a 1st embodiment. It is a top view of the strut mount concerning a 1st embodiment. It is sectional drawing which shows the strut mount which concerns on 2nd Embodiment. It is a perspective view of the strut mount concerning a 2nd embodiment. It is a top view of the strut mount concerning a 2nd embodiment. It is a perspective view which shows the suspension apparatus as a prior art example.

  [First Embodiment]

  Hereinafter, a strut mount 10 according to a first embodiment of the present invention will be described with reference to FIGS. The strut mount 10 according to the present embodiment is used as an upper mount for connecting a shock absorber constituting a part of a strut type suspension mechanism to a vehicle body of an automobile. As shown in FIG. 1, the shock absorber includes a cylinder part (not shown) with a built-in piston and a piston rod 2 connected to the piston and projecting outward from the cylinder part. The axial direction of the piston rod 2 is S.

  The strut mount 10 is attached to a vehicle body side panel 60 constituting a fender apron or the like of the vehicle body. The piston rod 2 is connected to the strut mount 10. A shock absorber constituting a part of the suspension mechanism is attached to the vehicle body via a strut mount 10.

  The strut mount 10 includes an outer mounting member 20, an inner mounting member 30, and an elastic body 40.

  The inner mounting member 30 has a bottomed cylindrical shape, and extends radially outward from the cylindrical inner tube portion 32, the bottom portion 34 formed at the lower end of the inner tube portion 32, and the upper end side of the inner tube portion 32. The flange portion 36 is provided. The inner cylinder part 32, the bottom part 34, and the flange part 36 are integrally formed. A fixing hole 34 </ b> A is formed at the center of the bottom 34. The inner cylinder portion 32 is disposed such that the cylinder axis coincides with the axial direction S of the piston rod 2. The flange portion 36 is disposed so as to face an upper stopper 26 described later in the axial direction S. An intermediate cylinder 38 is extrapolated on the outer periphery of the inner cylinder portion 32.

  A stopper fitting 50 is disposed below the inner mounting member 30. The stopper fitting 50 has a bottomed cylindrical shape, and is arranged with the bottom 53 facing upward. The outer diameter of the cylindrical outer portion 54 is larger than the outer diameter of the intermediate cylinder 38, and the lower receiving portion 52 is disposed on the outer peripheral edge portion of the bottom portion 53 so as to face a lower stopper rubber 28 </ b> A described later. Is formed. The lower receiving portion 52 is formed by a step which is lowered below the center portion of the bottom portion 53. A fixing hole 53A is formed at the center of the bottom 53 of the stopper fitting 50.

The stopper fitting 50 and the inner attachment member 30 are both pistons by inserting the tip 3 of the piston rod 2 into the fixing holes 53A and 34A from the stopper fitting 50 side and fastening with the nut N from the inner attachment member 30 side. It is connected to the rod 2.
An upper end portion of a dust cover (not shown) that covers the piston rod 2 is fitted to the inner periphery of the outer portion 54.

  The outer mounting member 20 includes an outer cylinder portion 22, a flange portion 24, an upper stopper 26, and a lower stopper 28. The outer cylinder part 22, the flange part 24, the upper stopper 26, and the lower stopper 28 are integrally formed. The outer cylinder part 22 is formed in a cylindrical shape, and is arranged on the outer periphery of the inner mounting member 30 so as to be coaxial with the inner cylinder part 32. The outer cylinder part 22 is made into the taper cylinder shape by which a lower side (piston rod 2 side) becomes a small diameter.

  The upper end of the outer cylinder portion 22 is bent so as to be folded back radially outward, and an upper stopper 26 that is convex upward is formed in an annular shape. Further, the lower end portion of the upper stopper 26 is bent and extended so as to extend outward in the radial direction, and a flange portion 24 is formed.

  As shown in FIGS. 2 and 3, the flange portion 24 has a substantially triangular shape when viewed from above, and the peripheral edge portion is folded downward. The flange portion 24 is formed with a separation surface portion 24A, a mounting projection surface portion 24B, and a receiving surface portion 24D. The separation surface portion 24A extends from the lower end portion of the upper stopper 26 and has a flush shape. The mounting projection surface portion 24B is a projection surface that protrudes upward from the separation surface portion 24A, and is formed at each of the three corners of the flange portion 24 (see the hatched portion in FIG. 3). The three mounting projection surface portions 24B are formed in a flush manner, and the outer peripheral edge portion of the mounting projection surface portion 24B is formed in an R shape. An attachment hole 24H is formed in the attachment protrusion 24B. A mounting hole 60H is formed in the vehicle body side panel 60. The vehicle body side panel 60 is brought into contact with the mounting protrusion 24B, and the flange portion 24 is fixed to the vehicle body side panel 60 by the bolt 4 through the mounting hole 24H and the mounting hole 60H.

  The separation surface portion 24 </ b> A occupies a region excluding the mounting projection surface portion 24 </ b> B on the upper surface of the flange portion 24 and reaches the outer peripheral edge. Since the separation surface portion 24A is retracted below the attachment projection surface portion 24B, the separation surface portion 24A is spaced apart from the vehicle body side panel 60.

  On the outer peripheral portion of the upper stopper 26 of the flange portion 24 and on the inner peripheral portion from the fastening position of the bolt 4, a receiving surface portion 24D for receiving the bearing 14 is constituted by a part of the separation surface portion 24A. The receiving surface portion 24D is a flat surface and has an annular shape.

  The lower end of the outer cylindrical portion 22 has an outer diameter smaller than that of the upper end and is bent radially outward to form a lower stopper 28.

  An elastic body 40 is disposed between the outer cylinder portion 22 and the intermediate cylinder 38. The elastic body 40 is vulcanized and bonded to the inner periphery of the outer tube portion 22 and the outer periphery of the intermediate tube 38 to elastically connect the two. The inner cylinder part 32 is elastically connected to the outer cylinder part 22 by an elastic body 40 via an intermediate cylinder 38.

  An upper stopper rubber 26 </ b> A extending from the elastic body 40 is formed on the upper surface of the upper stopper 26. The upper stopper rubber 26A and the lower surface of the flange portion 36 are spaced apart from each other. The elastic body 40 extends so as to cover the lower surface of the lower stopper 28 and protrudes downward to form a lower stopper rubber 28A. The lower stopper rubber 28 </ b> A is convex toward a receiving portion 52 of a stopper fitting 50 described later, and is integrally formed with the elastic body 40. The lower stopper rubber 28A and the lower receiving portion 52 are spaced apart from each other.

  An outer rubber part 42 is provided integrally with the elastic body 40 on the outer peripheral side of the outer cylinder part 22. The outer rubber portion 42 extends so as to cover the receiving surface portion 24D, and a bearing receiving portion 44 is formed below the receiving surface portion 24D. The bearing 14 is disposed in the bearing receiving portion 44 and receives a load from an upper end of a coil spring (not shown) disposed on the outer periphery of the piston rod 2.

  Next, the operation of the strut mount 10 having the above configuration will be described.

  When the outer mounting member 20 and the inner mounting member 30 are relatively moved in the axial direction S by vibration input from a shock absorber (not shown), the elastic body 40 is elastically deformed to absorb the vibration. When the amount of movement exceeds the distance between the upper stopper rubber 26A and the lower surface of the flange portion 36, or the distance between the lower stopper rubber 28A and the upper surface of the lower receiving portion 52, the upper stopper rubber 26A or the lower stopper rubber 28A 36 or the lower receiving portion 52 and the amount of relative movement is restricted while vibration is absorbed by elastic deformation.

  In the strut mount 10 of the present embodiment, the mounting projection surface portion 24B is in contact with the vehicle body side panel 60, but the separation surface portion 24A is disposed at a position retracted from the vehicle body side panel 60 and is separated from the vehicle body side panel 60. ing. Therefore, even if the flange portion 24 is bent and deformed by vibration, for example, the flange portion 24 is not brought into contact with the vehicle body side panel 60, and generation of abnormal sounds such as a hitting sound and a rubbing sound can be suppressed.

  Further, since the receiving surface portion 24D that is flush with the separation surface portion 24A is formed in an annular shape, an uneven load hardly acts and the bearing 14 can be received stably. Furthermore, since the bearing 14 is stably held, generation of abnormal noise can be suppressed.

  Further, since the separation surface portion 24A reaches the outer peripheral edge of the flange portion 24, it is possible to more effectively suppress the generation of abnormal noise.

  In this embodiment, since the upper stopper 26 and the lower stopper 28 are integrally formed by bending the outer mounting member 20, the stopper can be easily formed with a simple configuration without increasing the number of parts. can do.

  In the present embodiment, the outer cylindrical portion 22 of the outer mounting member 20 is formed in a tapered shape having a smaller diameter toward the lower side, so that the diameter of the lower stopper 28 can be reduced, and the lower receiving portion The diameter of 52 can be made small, and size reduction of an apparatus can be achieved.

  [Second Embodiment]

  Next, a second embodiment of the present invention will be described with reference to FIGS. In the present embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  The strut mount 70 of the present embodiment is different from the first embodiment in the configuration of the flange portion, and the other configurations are the same as those in the first embodiment. The strut mount 70 of the present embodiment is provided with a flange portion 74 instead of the flange portion 24 of the first embodiment.

  As shown in FIG. 5, the flange portion 74 has a substantially triangular shape as viewed from above. The flange portion 74 is formed with a separation concave surface portion 74A, a mounting projection surface portion 74B, and a receiving surface portion 74D. The attachment projection surface portion 74B extends from the lower end portion of the upper stopper 26 and is formed at each of the three corner portions of the flange portion 74 (see the hatched portion in FIG. 6). The three attachment projection surface portions 74B are flush with each other. A mounting hole 74H is formed in the mounting protrusion 74B. The vehicle body side panel 60 is brought into contact with the attachment projecting surface portion 74B, and the flange portion 74 is fixed to the vehicle body side panel 60 by the bolts 4 through the attachment holes 74H and 60H.

  The separation concave surface portion 74 </ b> A is formed between the adjacent mounting projection surface portions 74 </ b> B at the outer peripheral end of the flange portion 74. The separation concave surface portion 74 </ b> A has a concave shape that is retracted below the mounting projection surface portion 74 </ b> B, and is spaced from the vehicle body side panel 60.

  A receiving surface portion 74D for receiving the bearing 14 is formed on the outer peripheral portion of the upper stopper 26 of the flange portion 74 and on the inner peripheral portion from the fastening position of the bolt 4. The receiving surface portion 74D has an annular shape with a flat surface that is flush with the mounting protrusion surface portion 74B. The upper surface side of the receiving surface portion 74 </ b> D is in contact with the vehicle body side panel 60.

  An outer rubber portion 72 is provided integrally with the elastic body 40 on the outer peripheral side of the outer cylinder portion 22. The outer rubber portion 72 extends so as to cover the receiving surface portion 74D, and a bearing receiving portion 76 is formed below the receiving surface portion 74D. The bearing 14 is disposed in the bearing receiving portion 76 and receives a load from the upper end of a coil spring (not shown) disposed on the outer periphery of the piston rod 2.

  Next, the operation of the strut mount 70 configured as described above will be described.

  In the strut mount 70 of the present embodiment, the mounting projection surface portion 74B and the receiving surface portion 74D are in contact with the vehicle body side panel 60, but the separation concave surface portion 74A is disposed at a position retracted from the vehicle body side panel 60. It is separated from the panel 60. Therefore, even if the flange portion 74 is bent and deformed by vibration, for example, the flange portion 74 is not brought into contact with the vehicle body side panel 60, and generation of abnormal sounds such as a hitting sound and a rubbing sound can be suppressed.

  Further, since the mounting projecting surface portion 74B and the receiving surface portion 74D that is flush with the mounting surface are formed in an annular shape, an uneven load is unlikely to act, and the bearing 14 can be received stably. Furthermore, since the bearing 14 is stably held, generation of abnormal noise can be suppressed.

  Further, since the separation concave surface portion 74A is formed on the outer peripheral edge of the flange portion 74, it is possible to effectively suppress the generation of abnormal noise.

DESCRIPTION OF SYMBOLS 10 Strut mount 14 Bearing 20 Outer attachment member 22 Outer cylinder part 24A Separation surface part 24 Flange part 24B Installation protrusion part 24D Reception surface part 26 Upper stopper 28 Lower stopper 30 Inner attachment member 34 Flange part 40 Elastic body 42 Outer rubber part 50 Stopper metal fitting 52 Lower receiving portion 60 Car body side panel 70 Strut mount 74 Flange portion 74B Mounting projection surface portion 74D Receiving surface portion 74A Separation concave surface portion (separation surface portion)

Claims (5)

An inner mounting member to which the piston rod of the shock absorber is mounted;
A cylindrical outer tube portion disposed on the outer peripheral side of the inner mounting member, and formed integrally with the outer tube portion, extending radially outward from one end of the outer tube portion, and flat on the vehicle body side panel A mounting projection surface portion that is attached at a plurality of locations while abutting on the surface and is flush with the mounting projection surface portion, and is disposed at a position retracted from the vehicle body side panel with respect to the mounting projection surface portion, and the vehicle body side panel An outer mounting member having a spaced-apart surface portion, and a flange portion that is formed on the outer periphery of the outer cylinder portion so as to be flush with and annular, and on which a spring or a bearing of a shock absorber is disposed.
A rubber elastic body disposed between the inner mounting member and the outer mounting member and connecting the two;
With strut mount.   The strut mount according to claim 1, wherein the separation surface portion is formed at least on an outer peripheral edge of the flange portion.   An upper stopper that protrudes upward from the mounting projecting surface portion is formed on the radially inner side of the flange portion so as to be bent integrally and continuously from the upper end of the outer tube portion in the tube axis direction. The strut mount according to claim 1 or 2. The lower stopper bent continuously from the outer member to the radially outer side is integrally formed at the lower end of the outer tube portion in the tube axis direction. 4. The strut mount according to any one of items 3.   The strut mount according to claim 4, wherein the outer cylinder portion has a tapered shape with a smaller diameter toward the lower side.