JP2012206636A - Strut mount - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a strut mount capable of suppressing the generation of an abnormal sound at a large displacement input time.SOLUTION: Since a groove 32d is formed in a concave form at a bottom face of a recessed part 32c located between a first projection 32b1 and a second projection 32b2, even if an upper stopper 32 is largely crushed by a flange plate of an inner member 10 by a large displacement input, the formation of a closed space between the upper stopper part 32 and the inner member 10 is suppressed. That is, an inner space between the upper stopper 32 and the inner member 10 is made to communicate with an outer space via the groove 32d and air is discharged from the inner space, so that such trouble that the air in the inner space is compressed or its pressure becomes negative pressure is suppressed. As a result, the generation of the abnormal sound by a discharge sound and a suction sound is suppressed at the large displacement input time.

Description

  The present invention relates to a strut mount, and more particularly to a strut mount that can suppress the generation of abnormal noise when a large displacement is input.

  In a suspension mechanism in a vehicle such as an automobile, a rod end of a shock absorber is elastically coupled to the vehicle body side via a strut mount, thereby suppressing vibration from the wheel side from being transmitted to the vehicle body side.

  As this type of strut mount, for example, Patent Document 1 discloses an inner cylinder fitting 1 (inner member) attached to the tip of the rod R of the shock absorber SB, and an outer cylinder fitting 2 (outer member) attached to the vehicle body F side. A rebound stopper 7 (stopper plate) that connects the inner cylinder fitting 1 and the outer cylinder fitting 2 and has a rubber elastic body 3 (vibration-proof base) composed of a rubber elastic body and projects outward in the radial direction. A strut mount 100 in which a rubber stopper 17 is provided on the rubber-like elastic body 3 for receiving the displacement of the rebound stopper 7 is disclosed.

  According to the strut mount 100, the rubber stopper portion 17 is provided with the annular first stopper portion 18, and the plurality of second stopper portions 19 protruding from the upper surface of the first stopper portion 18 are distributed in the circumferential direction. The third stopper portion 20 is protruded from the upper surface of each second stopper portion 19. Therefore, when the displacement of the rebound stopper 7 is received by the rubber stopper portion 17 by the input in the rebound direction, the third stopper portion 20 is first compressed, and then the second stopper portion 19 and the first stopper portion 20. Are sequentially compressed, so that a non-linear characteristic in which the spring constant gradually increases can be obtained.

JP 2006-281827 A (FIG. 1, FIG. 3, paragraph [0006], etc.)

  However, in the above-described conventional strut mount 100, when full rebound is input to the vehicle, the rubber stopper portion 17 is crushed by the rebound stopper 7 and is sealed between the rubber stopper portion 17 and the inner tube fitting 1. Since the space is formed, exhausted air is generated by discharging the compressed air in the space, and thereafter the negative pressure in the space is released when the rebound stopper 7 is separated from the rubber stopper portion 17. In other words, there was a problem that an adsorption sound was generated.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a strut mount that can suppress the generation of abnormal noise when a large displacement is input.

Means for Solving the Problems and Effects of the Invention

  According to the strut mount of the first aspect, the rubber stopper portion projects toward the stopper plate portion of the inner member and protrudes from the annular annular base portion that is continuous in the circumferential direction, and the projecting tip surface of the annular base portion. And a plurality of projecting portions distributed in the circumferential direction, the inner member is displaced relative to the outer member, and the stopper plate portion of the inner member is received by the rubber stopper portion. First, each protrusion is compressed, and then the annular base is compressed, so that a non-linear characteristic in which the spring constant gradually increases can be obtained.

  In this case, according to the first aspect of the present invention, since a groove-shaped groove portion is provided on the bottom surface of the concave portion located between the plurality of projecting portions and extends along the radial direction of the annular base portion, an input of a large displacement is provided. Thus, even when the rubber stopper portion is largely crushed by the stopper plate portion of the inner member, it is possible to suppress the formation of a sealed space between the rubber stopper portion and the inner member. That is, the internal space between the rubber stopper portion and the inner member can be communicated with the external space via the groove portion so that air can escape, so that the air in the internal space can be compressed or become negative pressure. Can be suppressed. As a result, there is an effect that it is possible to suppress the generation of abnormal noise due to the discharged sound and suction sound when a large displacement is input.

  In addition, since a protrusion part is a site | part which repeatedly deform | transforms with a displacement input and the deformation amount is also large, when a groove part is provided, a fall of durability will be caused. However, in Claim 1, a groove part is recessedly provided. Is the bottom surface of the recess, and is the part where the number of deformations and the amount of deformation at the time of the displacement input are the smallest, so that the durability can be improved accordingly.

  According to the strut mount of the second aspect, in addition to the effect achieved by the strut mount of the first aspect, the rubber stopper portion includes a plurality of protrusions having different protrusion heights from the protrusion front end surface of the annular base portion. Since these protrusions are sequentially compressed, the non-linear characteristic in which the spring constant gradually increases can be obtained more reliably.

  In this case, since the plurality of protrusions are provided with a minimum protrusion having a minimum protrusion height in the circumferential direction, and a groove is provided in a recess located between the minimum protrusions provided side by side. There is an effect that generation of abnormal noise can be more reliably suppressed. In other words, since the projecting portion is compressed in order from the highest projecting height, when the large displacement is input, the projecting portion with the higher projecting height has a higher compression rate, and the surplus generated with the compression becomes larger. Since the projecting portion has a small volume and a minimum compression rate, it is possible to prevent the groove portion from being blocked by the surplus wall by providing the groove portion in the recess between the minimum projecting portions. As a result, even when a large displacement is input, the effect of escaping air can be maintained, and the generation of abnormal noise can be more reliably suppressed.

  Moreover, since the groove portion is provided in the recess between the minimum protrusions provided in this manner, the cross-sectional area of the groove portion can be reduced, and accordingly, the volume of the rubber-like elastic body in the vicinity of the recess ( The rubber volume) can be secured to improve durability. Moreover, since the said recessed part by which a groove part is recessedly provided is a site | part with the least frequency | count of the repeated deformation | transformation accompanying a displacement input, and the deformation amount in that case, durability can be aimed at by that much.

  According to the strut mount of the third aspect, the rubber stopper portion protrudes toward the stopper plate portion of the inner member and protrudes from the protruding tip end surface of the annular base portion that is continuous in the circumferential direction and the annular base portion. And a plurality of projecting portions distributed in the circumferential direction, the inner member is displaced relative to the outer member, and the stopper plate portion of the inner member is received by the rubber stopper portion. First, each protrusion is compressed, and then the annular base is compressed, so that a non-linear characteristic in which the spring constant gradually increases can be obtained. In addition, since each protrusion has a different protruding height from the protruding tip surface of the annular base, each of the protrusions is compressed in turn, so that the non-linear characteristic in which the spring constant gradually increases can be more reliably ensured. Obtainable.

  In this case, according to the third aspect, the minimum protruding portion having the minimum protruding height among the plurality of protruding portions is provided in the circumferential direction, and within the plurality of recessed portions positioned between the plurality of protruding portions. Since the recess depth of the minimum recess located between the minimum protrusions provided side by side is maximized, there is an effect that air can escape through the minimum recess and the generation of abnormal noise can be suppressed.

  In other words, since the projecting portion is compressed in order from the highest projecting height, when the large displacement is input, the projecting portion with the higher projecting height has a higher compression rate, and the surplus generated with the compression becomes larger. Since the protruding portion has a small volume and the lowest compression ratio, the minimum recessed portion is blocked by the surplus thickness by setting the depth of the recessed portion between the minimum protruding portions to the maximum. This can be suppressed. As a result, even when a large displacement is input, air can escape from the internal space formed between the inner member and the rubber stopper to the external space by the minimum recess, so that the air in the internal space is compressed and Negative pressure can be suppressed. As a result, there is an effect that it is possible to suppress the generation of abnormal noise due to the discharged sound and suction sound when a large displacement is input.

  In addition, as described above, since the groove is not required to be recessed by setting the depth of the recessed portion between the minimum protrusions to be the maximum, thereby eliminating the air, durability due to stress concentration is reduced. There is an effect that the decrease can be suppressed. Moreover, since it is not necessary to provide a small convex part in the vulcanization mold in order to provide the groove, the manufacturing cost and maintenance cost of the vulcanization mold can be reduced.

  According to the strut mount according to claim 4, in addition to the effect of the strut mount according to any one of claims 1 to 3, the groove portion according to claim 1 or 2, or the minimum gap portion according to claim 3. Is recessed to a position deeper than the projecting tip surface of the annular base, and one end side opens to the inner peripheral surface of the annular base and the other end opens to the projecting tip surface of the annular base. Even when the rubber stopper part is largely crushed by the stopper plate part of the inner member at the time of position input, the groove part or the concave part between the minimums is prevented from being blocked by the excess wall, and the role of escaping air is surely exhibited. Can do. That is, even when a large displacement is input, a passage that communicates the internal space formed between the inner member and the rubber stopper portion with the external space can be ensured, so that air can be surely escaped. There is an effect that it can be more reliably suppressed.

It is a top view of the strut mount in a 1st embodiment of the present invention. It is sectional drawing of the strut mount in the II-II line | wire of FIG. It is a top view of a molded product. It is sectional drawing of the molded article in the IV-IV line of FIG. It is a bottom view of a molded product. (A) is the elements on larger scale of the molded article in the VIa-VIa line of FIG. 3, (b) is the elements on larger scale of the molded article in the VIb-VIb line of FIG. 6 (a). (A) is the elements on larger scale of the molded article in the VIIa-VIIa line of FIG. 5, (b) is the elements on larger scale of the molded article in the VIIb-VIIb line of FIG. 7 (a). It is a top view of the molded product in 2nd Embodiment. (A) is the elements on larger scale of the molded article in the IXa-IXa line of FIG. 8, (b) is the elements on larger scale of the molded article in the IXb-IXb line of FIG. 8 (a). (A) is the elements on larger scale of the molded article in 3rd Embodiment, (b) is the elements on larger scale of the molded article in the Xb-Xb line | wire of Fig.10 (a).

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a top view of the strut mount 1 according to the first embodiment of the present invention, and FIG. 2 is a cross-sectional view of the strut mount 1 taken along the line II-II in FIG. FIGS. 1 and 2 illustrate a state in which the shock absorber rod R is fastened and fixed to the inner member 10 and the dust cover DC is attached to the outer member 20.

  As shown in FIGS. 1 and 2, the strut mount 1 is interposed between a rod R of a shock absorber and a vehicle body side (not shown) in an automobile suspension mechanism (suspension mechanism, not shown). Thus, it is a vibration isolator that reduces vibration transmitted from the wheel side to the vehicle body side, the inner member 10 to which the tip of the rod R of the shock absorber is fastened and fixed, and the outer member 20 that is fastened and fixed to the vehicle body side, A vibration-proof base 30 that connects the inner member 10 and the outer member 20 is provided.

  The inner member 10 has a vibration-proof base 3 vulcanized and bonded to the outer peripheral side and a cylindrical portion 11 formed into a cylindrical shape having a shaft O from a steel material, and is press-fitted into the cylindrical portion 11 and is cupped from the steel material. The upper cup portion 12 is formed in a shape, and the lower cup portion 13 is fixed to the upper cup portion 12 back to back (that is, in a state where the bottom surfaces are aligned) and is formed in a cup shape from a steel material. .

  A flange plate 12a is formed on the upper end side (upper side in FIG. 2) of the upper cup portion 12 so as to project radially outward. When a displacement is input in the rebound direction (the direction in which the inner member 10 moves downward in FIG. 2), the flange plate 12 a is received by the upper stopper portion 32 of the vibration-isolating base 30 and the pressure receiving portion 22 of the outer member 20. The relative displacement of the inner member 10 with respect to 20 is regulated while being buffered.

  The bottom plate 13a (upper side surface in FIG. 2) of the lower cup portion 13 is formed in a circular shape having an outer diameter dimension substantially equal to the flange plate 12a of the upper cup portion 12, and the bounce direction (the inner member 10 moves upward in FIG. 2). Direction), the bottom plate 13a of the lower cup portion 13 is received by the lower stopper portion 33 of the vibration isolating base 30 and the pressure receiving portion 22 of the outer member 20, so that the relative displacement of the inner member 10 with respect to the outer member 20 is reduced. Regulated while being buffered.

  The outer member 20 is formed of a steel material in a substantially triangular shape when viewed from above and is disposed so as to be inclined with respect to the axis O, and among the openings opened at the center of the upper surface plate 21. A pressure receiving portion 22 that is suspended from the periphery and formed in a coaxial cylindrical shape on the cylindrical portion 11 of the inner member 10 is provided. The pressure receiving portion 22 has a horizontal U-shaped cross-sectional shape, and its inner diameter is made smaller than the outer diameter of the flange plate 12a of the upper cup portion 12 and the bottom plate 13a of the lower cup portion 13.

  The upper surface plate portion 21 of the outer member 20 is formed such that the outer peripheral edge portion is bent toward the bottom surface side (the lower side in FIG. 2), and the dust cover DC is formed between the bent portion and the vibration isolation base 30. Hold it in place. Moreover, the fastening bolt B is press-fitted and fixed to the upper surface plate portion 21 in a state where the fastening bolts B protrude to the upper surface side at three locations that become corner portions.

  The anti-vibration base 30 is a member that connects the inner member 10 and the outer member 20, and is formed in a thick annular shape from a rubber-like elastic body. The anti-vibration base 30 is vulcanized and bonded to the cylindrical portion 11 and the outer member 20 before the inner member 10 is assembled.

  That is, the strut mount 1 first vulcanizes and molds a molded product H1 (for example, see FIG. 4) in which the cylindrical portion 11 and the outer member 20 are connected by the vibration-isolating base 30 in the vulcanization process. Then, after the upper cup portion 12 is press-fitted into the cylindrical portion 11 in the direction of the axis O in the press-fitting step with respect to the molded product H1, the bottom surface of the lower cup portion 13 is placed on the bottom surface of the upper cup portion 12 in the welding step. Are arranged coaxially and are manufactured by fixing the bottom surfaces of both cup portions 12 and 13 by projection welding. In addition, in the state in which the bottom surfaces of both cup parts 12 and 13 are fixed by the welding process, the first projecting part 32b1 and the third projecting part 33b1 are compressed between the flange plate 12a and the bottom plate 13a (see FIG. 2). .

  Here, based on the molded product H1, the detailed structure of the outer member 20 and the vibration isolating base 30 will be described with reference to FIGS. 3 is a top view of the molded product H1, and FIG. 4 is a cross-sectional view of the molded product H1 taken along line IV-IV in FIG. FIG. 5 is a bottom view of the molded product H1. 3 to 5 show a state before the fastening bolt B is press-fitted and fixed to the molded product H1. 3 and 5 schematically illustrate the uneven shapes of the upper stopper portion 32 and the lower stopper portion 33 in order to clarify the shape and facilitate understanding.

  As shown in FIGS. 3 to 5, the pressure receiving portion 22 of the outer member 20 is a circular connection located on the innermost circumferential side and curved in a cross-sectional arc shape (an arc shape whose center is located on the outer circumferential surface side in FIG. 4). Section 22a, an inclined pressure receiving section 22b having a linear cross-sectional view rising upward from the upper end side (the upper side in FIG. 4) of the circular connecting section 22a toward the upper surface plate section 21, and the upper end side (extension) of the inclined pressure receiving section 22b. A connecting portion 22c extending along the axis O and connected to the inner peripheral edge of the upper surface plate portion 21, and radially outward from the lower end side (lower side in FIG. 4) of the circular connecting portion 22a. And a parallel pressure receiving portion 22d extending linearly toward the axis O (perpendicular to the axis O).

  In addition, the connection part 22c is formed in a substantially triangular shape when the side surface view is developed in a plane as the upper plate 21 is inclined with respect to the pressure receiving part 22 (axis O). That is, the height dimension of the connecting portion 22c is minimum (the height dimension is 0 in the present embodiment) on the most descending inclination side (left side in FIG. 4) of the upper surface plate portion 21, and on the most ascending inclination side (right side in FIG. 4). The height of the connecting portion 22c is maximized.

  The anti-vibration base 30 is vulcanized and bonded to the outer peripheral surface of the cylindrical portion 11 of the inner member 10 on the inner peripheral surface side, and the inner peripheral edge portion and the pressure receiving portion 22 of the upper surface plate portion 21 of the outer member 20 are embedded therein. The outer peripheral surface of the outer member 20 is exposed on the bottom surface side of the upper surface plate portion 21 and is formed into a thick annular ring coaxial with the axis O as a whole.

  The anti-vibration base 30 is connected to a connection main body 31 that connects the outer peripheral surface of the cylindrical portion 11 of the inner member 10 and the circular connection 22 a of the pressure receiving portion 22 of the outer member 20, and the connection main body 31. In addition, the upper stopper portion 32 disposed on the upper surface side (upper side in FIG. 4) of the inclined pressure receiving portion 22 b of the pressure receiving portion 22 of the outer member 20, and the parallel pressure receiving portion in the pressure receiving portion 22 of the outer member 20 while continuing to the connection main body portion 31. The lower stopper portion 33 disposed on the bottom surface side of 22d (lower side in FIG. 4), and the bottom surface of the outer peripheral side of the pressure receiving portion 22 of the outer member 20 and the inner peripheral edge portion of the upper surface plate portion 21. The outer peripheral part 34 arrange | positioned at the side is mainly provided.

  The upper stopper portion 32 protrudes from the upper surface of the inclined pressure receiving portion 22b of the pressure receiving portion 22 of the outer member 20 upward (upper side in FIG. 4) and is formed in an annular shape as viewed in the axial direction continuous in the circumferential direction. The first projecting portion 32b1 and the second projecting portion 32b2 which are projected from the projecting tip end surface (upper side surface in FIG. 4) of the upper annular portion 32a and distributed in the circumferential direction, and the respective projecting portions 32b1. , 32b2 is provided with a groove-shaped groove portion 32d that is recessed in a part of the bottom surface of the recess portion 32c and extends along the radial direction of the upper annular portion 32a.

  The upper annular portion 32 a is formed with a predetermined gap between the inner peripheral surface thereof and the outer peripheral surface of the cylindrical portion 11 of the inner member 10. Therefore, when the displacement in the rebound direction is input and the flange plate 12a (see FIG. 2) of the upper cup portion 12 is received, the deformability of the upper stopper portion 32 (upper annular portion 32a) is ensured by the gap. The

  As shown in FIG. 3, a plurality of the first protrusions 32b1 and the second protrusions 32b2 are alternately arranged in the circumferential direction (four in this embodiment, a total of eight), and each of the protrusions 32b1. , 32b2 is separated by a recess 32c. That is, the first projecting portion 32b1 and the second projecting portion 32b2 project from the upper surface of the upper annular portion 32a (projecting tip surface, front side surface in FIG. 3) as viewed in the axial direction shown in FIG. Are each formed in a shape that is divided by a plurality of recesses 32c.

  The recesses 32c are formed in a symmetrical shape with a pair of first protrusions 32b1 (or second protrusions 32b2) sandwiched therebetween, and the depths of the recesses 32c (the axial direction of the bottom surface of the recesses 32c ( In FIG. 4, the vertical direction) positions) are the same. In the present embodiment, the central angle of the first protrusion 32b1 is the maximum angle when viewed in the axial direction shown in FIG. 3, and the center with the axis O as the center in the order of the second protrusion 32b2 and the recess 32c. The corner is set to a small angle.

  The groove 32d communicates the internal space formed between the upper stopper portion 32 and the inner member 10 (upper cup portion 12) with the external space, and allows air to flow between the two spaces. The bottom surface of the recess 32c is a narrow groove extending linearly from the inner peripheral surface side to the outer peripheral surface side of the triangular section (see FIG. 6B) protruding from the upper annular portion 32a. Is recessed.

  The groove 32d is disposed only in the predetermined recess 32c. That is, the groove portions 32d are not provided in all the recessed portions 32c, but the groove portions 32d are provided only in some of the recessed portions 32c (in this embodiment, two recessed portions 32c). Volume can be secured and durability can be improved. In this case, the plurality of groove portions 32d (two in the present embodiment) are arranged at equal intervals in the circumferential direction (180 ° intervals in the present embodiment), so that the upper stopper portion 32 is deformed. The symmetry at the time can be secured. Therefore, durability can be improved also from this point.

  Here, with reference to FIG. 6, the detailed structure of the upper stopper part 32 is demonstrated. 6A is a partial enlarged cross-sectional view of the molded product H1 along the line VIa-VIa in FIG. 3, and FIG. 6B is a partial enlarged view of the molded product H1 along the line VIb-VIb in FIG. 6A. It is sectional drawing. 6A illustrates a state where the cross section taken along the line VIa-VIa in FIG. 3 is expanded in a plane, and FIG. 6B illustrates a cross section obtained by cutting the state expanded in the plane. The

  As shown in FIG. 6, the first protrusion 32 b 1, the second protrusion 32 b 2, the recess 32 c, and the groove 32 d are triangular in cross section and protrude upward from the upper annular portion 32 a (upper side in FIG. 6B). The part is formed. The section with a triangular cross section is formed such that the inner peripheral side (left side in FIG. 6B) is substantially perpendicular to the axis O (see FIG. 4) and the outer peripheral side (right side in FIG. 6B) is an upper ring from the top. It is formed so as to be inclined downward toward the upper surface of the portion 32a (protruding front end surface, upper side surface of FIG. 6B).

  In the cross-sectional view shown in FIG. 6A, the first projecting portion 32b1 has a maximum projecting height at a substantially central portion in the circumferential direction (FIG. 6A left-right direction). The protrusion is formed as a protrusion whose protrusion height gradually decreases toward the recess 32c. Further, in the cross-sectional shape shown in FIG. 6B, the first projecting portion 32b1 is formed in the same shape as the triangular cross-sectional portion protruding from the upper annular portion 32a.

  The second projecting portion 32b2 is a projecting portion whose projecting height from the upper surface of the upper annular portion 32a (projecting tip surface, upper surface in FIG. 6B) is lower than that of the first projecting portion 32b1, and FIG. In the cross-sectional view shown in a), the protruding height is formed as a protruding portion that is substantially constant along the circumferential direction. In addition, the second protrusion 32b2 is formed as a protrusion having a shape in which the crest of the first protrusion 32b1 is crested with a plane orthogonal to the axis O (see FIG. 4) in the cross-sectional view shown in FIG. 6B. Is done.

  The recess 32c is a recess in which both side surfaces are formed by the adjacent first projecting portion 32b1 and second projecting portion 32b2, and the bottom surface connecting both the side surfaces is formed as a flat surface orthogonal to the axis O (see FIG. 4). The Moreover, as for the cross-sectional shape of the recessed part 32c, the shape shown to Fig.6 (a) continues along the left-right direction of FIG.6 (b).

  The groove 32d is a narrow groove that is recessed in the bottom surface of the recess 32c and extends linearly outward from the axis O (see FIG. 3), as shown in FIG. 6 (a). The cross-sectional shape is formed in a substantially U shape. Further, the groove portion 32d is disposed substantially at the center in the width direction (FIG. 6 (a) left-right direction) of the recess 32c.

  The depth of the recessed portion of the groove 32d (the position of the bottom surface in the axial direction (FIG. 6 (b) vertical direction)) is a depth that does not reach the upper surface of the upper annular portion 32a (protruding tip surface, upper surface of FIG. 6 (b)). Is done. Moreover, as for the cross-sectional shape of the groove part 32d, the shape shown to Fig.6 (a) continues along the left-right direction of FIG.6 (b). Accordingly, both ends in the extending direction of the groove 32d are respectively provided on the inner peripheral surface (left side in FIG. 6 (b)) and the outer peripheral surface (right side in FIG. 6 (b)) protruding from the upper annular portion 32a. Opened.

  The groove 32d has a groove width (dimension in the left-right direction in FIG. 6A) set to approximately 20% or more and 40% or less with respect to the bottom width of the recess 32c (the width in the left-right direction in FIG. 6A). The recess depth (the dimension from the opening to the bottom of the groove 32d, the vertical dimension in FIG. 6A) is the axial length from the top of the second protrusion 32b2 to the bottom of the recess 32c (see FIG. 6B). ) Is preferably set to approximately 90% to 110%. This is to prevent the groove 32d from being blocked when a large displacement is input in the rebound direction, and to ensure the effect of escaping air while ensuring the durability in the vicinity of the groove 32d.

  As described above, the upper stopper portion 32 protrudes upward from the upper surface of the inclined pressure receiving portion 22b (see FIG. 4) of the outer member 20 (that is, the flange plate 12a of the upper cup portion 12, see FIG. 2). Displacement in the rebound direction since the upper annular portion 32a and the first projecting portion 32b1 and the second projecting portion 32b2 that protrude from the upper surface (projecting tip surface) of the upper annular portion 32a and are distributed in the circumferential direction are provided. When the inner member 10 is relatively displaced by the input (displaced downward in FIG. 2) and the flange plate 12a in the upper cup portion 12 of the inner member 10 is received by the upper stopper portion 32 ( First, the projecting portions 32b1 and 32b2 are compressed, and then the upper annular portion 32a is compressed, so that a non-linear characteristic in which the spring constant gradually increases with displacement input can be obtained.

  In this case, the groove portion 32d is recessed on the bottom surface of the recess portion 32c located between the projecting portions 32b1 and 32b2, so that a large displacement in the rebound direction is input, and the upper stopper portion 32 is connected to the upper cup of the inner member 10. Even if the flange plate 12 a in the portion 12 is largely crushed, it is possible to suppress the formation of a sealed space between the upper stopper portion 32 and the inner member 10. That is, the internal space formed between the upper stopper portion 32 and the inner member 10 can be communicated with the external space via the groove portion 32d so that the air can escape, so that the air in the internal space is compressed. Negative pressure can be suppressed. As a result, it is possible to suppress the generation of abnormal noise due to the discharged sound and suction sound when a large displacement is input in the rebound direction.

  In addition, since each protrusion part 32b1, 32b2 is a part which is repeatedly deformed with displacement input and its deformation amount is large, if the groove part 32d is provided on the upper surface or side surface thereof, the durability is lowered. In the present embodiment, the groove 32d is recessed in the bottom surface of the recess 32c (that is, the portion where the number of deformations and the amount of deformation associated with the displacement input are the smallest), so that the durability is improved accordingly. be able to.

  Returning to FIG. 3 from FIG. The lower stopper portion 33 protrudes from the bottom surface (lower side surface in FIG. 4) to the lower side (lower side in FIG. 4) of the circular coupling portion 22a, the parallel pressure receiving portion 22d, and the inclined pressure receiving portion 22b in the pressure receiving portion 22 of the outer member 20. The lower annular portion 33a formed in an annular shape in the axial direction continuous in the circumferential direction, and protrudes from the projecting tip surface (lower side surface in FIG. 4) of the lower annular portion 33a and is dispersed in the circumferential direction. A groove shape that is recessed in the bottom surface of the recess 33c2 positioned between the third protrusion 33b1 and the fourth protrusion 33b2, and between the fourth protrusions 33b2, and extends along the radial direction of the lower annular portion 33a. Groove portion 33d.

  The lower annular portion 33a is formed with a predetermined gap between the inner peripheral surface thereof and the outer peripheral surface of the cylindrical portion 11 of the inner member 10 in the same manner as the upper annular portion 32a. Therefore, when the displacement in the bound direction is input and the bottom plate 13a (see FIG. 2) of the lower cup portion 13 is received, the deformability of the lower stopper portion 33 (lower annular portion 33a) is secured by the gap. .

  As shown in FIG. 5, there are a plurality of third protrusions 33b1 and fourth protrusions 33b2 in the circumferential direction (in the present embodiment, four third protrusions 33b1 and eight fourth protrusions 33b2 are 12 in total). And the projections 33b1 and 33b2 are separated by the recesses 33c1 and 33c2. That is, the third projecting portion 33b1 and the fourth projecting portion 33b2 are projected from the bottom surface (projecting tip surface, front side surface of FIG. 5) of the lower annular portion 33a and are centered on the axis O in the axial direction shown in FIG. Are each formed into a shape divided by a plurality of recesses 33c1 and 33c2.

  In addition, as for the 3rd protrusion part 33b1 and the 4th protrusion part 33b2, one 3rd protrusion part 33b1 is arrange | positioned whenever the two 4th protrusion parts 33b2 are arrange | positioned in the circumferential direction. Further, the third projecting portion 33b1 and the fourth projecting portion 33b2 are separated by a recess 33c1, and the fourth projecting portions 33b2 are separated by a recess 33c2.

  The recess 33c1 is formed in a symmetrical shape with a pair of the third protrusions 33b1 interposed therebetween. The recessed depths of the recesses 33c1 and 33c2 (the positions of the bottom surfaces of the recesses 33c1 and 33c2 in the axial direction (vertical direction in FIG. 4)) are the same. In the present embodiment, the central angle of the fourth protrusion 33b2 is the maximum angle when viewed in the axial direction shown in FIG. 5, and the axis O is the center in the order of the third protrusion 33b1 and the recesses 33c1 and 33c2. The center angle to be set is set to a small angle.

  The groove portion 33d allows the internal space formed between the lower stopper portion 33 and the inner member 10 (the upper cup portion 12 and the lower cup 13) to communicate with the outer space, and allows air to flow between the two spaces. As a narrow groove extending linearly from the inner peripheral surface side to the outer peripheral surface side of the trapezoidal section (see FIG. 7B) protruding from the lower annular portion 33a. A recess is provided on the bottom surface of the recess 33c2.

  In addition, the groove part 33d is arrange | positioned at all the recessed parts 33c2. As will be described later, the recess 33c2 is a recess positioned between the fourth protrusions 33b2, and therefore, deformation due to displacement input is small. That is, if it is the recessed part 33c2, durability can be ensured even if it provides the groove part 33c2. On the other hand, by providing the groove 33d in all the recesses 33c2 in this way, it is possible to reliably exhibit the function of escaping air.

  Here, with reference to FIG. 7, the detailed structure of the lower stopper part 33 is demonstrated. 7A is a partially enlarged cross-sectional view of the molded product H1 along the line VIIa-VIIa in FIG. 5, and FIG. 7B is a partially enlarged view of the molded product H1 along the line VIIb-VIIb in FIG. 7A. It is sectional drawing. 7A illustrates a state where the cross section taken along the line VIIa-VIIa in FIG. 5 is developed in a plane, and FIG. 7B illustrates a cross section obtained by cutting the state expanded in the plane. The

  As shown in FIG. 7, the third projecting portion 33 b 1, the fourth projecting portion 33 b 2, the recessed portion 33 c, and the groove portion 33 d are trapezoidal in cross section projecting downward from the lower annular portion 33 a (upper side in FIG. 7B). (See FIG. 7B). The trapezoidal cross section is formed such that the inner peripheral side (right side in FIG. 7B) is substantially perpendicular to the axis O (see FIG. 4) and the outer peripheral side (left side in FIG. 7B) is the upper bottom ( It is formed so as to incline downward from the upper part of FIG. 7B toward the bottom surface of the lower annular portion 33a (protruding front end surface, upper side surface of FIG. 7B).

  The third projecting portion 33b1 has a shape that is curved in an arc shape having a maximum projecting height at a substantially central portion in the circumferential direction (FIG. 7 (a) left-right direction) in the cross-sectional view shown in FIG. 7 (a). Formed as a protrusion. Further, in the cross-sectional shape shown in FIG. 7B, the third projecting portion 33b1 is formed in a trapezoidal shape similar to the above-mentioned cross-sectional trapezoidal shape protruding from the lower annular portion 33a. That is, in the trapezoidal cross-section portion protruding from the lower annular portion 33a, only the portion of the third protrusion 331b1 is enlarged on the outer peripheral side (left side in FIG. 7B) (see FIG. 5).

  The fourth projecting portion 33b2 is a projecting portion whose projecting height from the bottom surface of the lower annular portion 33a (projecting tip surface, upper surface in FIG. 7B) is lower than that of the third projecting portion 33b1, and FIG. In the cross-sectional view shown in a), the projecting height is maximized at a substantially central portion in the circumferential direction (FIG. 7 (a) left-right direction) and is curved in an arc shape with a larger radius than the third projecting portion 33b1. It is formed as a protruding part.

  The concave portion 33c1 is a concave portion in which both side surfaces are formed by the adjacent third protruding portion 33b1 and the fourth protruding portion 33b2, and the concave portion 33c2 is formed by the adjacent fourth protruding portion 33b2. These recesses 33c1 and 33c2 have a shape curved in an arc shape having a maximum recess depth at a substantially central portion in the circumferential direction (FIG. 7 (a) left-right direction) in the cross-sectional view shown in FIG. 7 (a). A portion (bottom surface) that is formed as a recess and has a maximum recess depth is extended in a direction perpendicular to the axis O (see FIG. 4), as shown in FIG. 7B. In the present embodiment, the concave portion 33c2 is curved in an arc shape with a larger radius than the concave portion 33c1, and the groove portion 33d is prevented from being blocked when a large displacement is input.

  The groove 33d is a narrow groove that is recessed in the recess 33c2 and extends linearly outward from the axis O (see FIG. 5) in the radial direction. The cross-sectional shape shown in FIG. Is formed in a substantially U-shape. Further, the groove 33d is disposed at a position (bottom surface) that is substantially the center of the width direction (FIG. 7A, left-right direction) of the recess 33c2.

  The depth of the groove 33d (the position of the bottom surface in the axial direction (FIG. 7 (b) vertical direction)) does not reach the bottom surface of the lower annular portion 33a (the projected tip surface, the upper side surface of FIG. 7 (b)). Is done. Moreover, as for the cross-sectional shape of the groove part 33d, the shape shown to Fig.7 (a) continues along the left-right direction of FIG.7 (b). Therefore, both ends in the extending direction of the groove 33d are respectively formed on the inner circumferential surface (left side in FIG. 7 (b)) and the outer circumferential surface (right side in FIG. 7 (b)) protruding from the lower annular portion 33a. Opened.

  The groove 33d has a groove width (dimension in the left-right direction in FIG. 7A) that is the width of the recess 33c2 (the distance between the intersections of the arc of the pair of adjacent fourth protrusions 33b2 and the arc of the recess 33c2, 7 (b) horizontal dimension) is set to approximately 10% or more and 30% or less, and the recessed depth (dimension from the opening of the groove 33d to the bottom surface, FIG. 7 (a) vertical dimension), It is preferably set to be approximately 40% or more and 80% or less with respect to the axial length (the vertical dimension in FIG. 7 (b)) from the top of the fourth protrusion 33b2 to the bottom surface (deepest part) of the recess 33c2. . This is to prevent the groove 33d from being blocked when a large displacement is input in the bounce direction, and to ensure the durability of the groove 33d in the vicinity while ensuring the effect of escaping air.

  As described above, the lower stopper portion 33 protrudes downward from the bottom surface of the pressure receiving portion 22 (see FIG. 4) of the outer member 20 (ie, the bottom plate 13a of the lower cup portion 13, see FIG. 2). Since it includes the annular portion 33a and the third projecting portion 33b1 and the fourth projecting portion 33b2 that project from the bottom surface (projecting tip surface) of the lower annular portion 33a and are distributed in the circumferential direction, the displacement input in the bound direction When the inner member 10 is displaced relative to the outer member 20 (displaced upward in FIG. 2) and the bottom plate 13a of the lower cup portion 13 of the inner member 10 is received by the lower stopper portion 33 (see FIG. 2). ) As in the case of displacement input in the rebound direction described above, first, the protrusions 33b1 and 33b2 are compressed, and then the lower annular portion 33a is compressed, so that the spring constant gradually increases with displacement input. Become non- It can be obtained form characteristics.

  In this case, since the lower stopper portion 33 is provided with the groove portion 33d, the lower stopper portion 33 and the inner member 10 (the upper and lower cup portions 12, 13) are interposed via the groove portion 33d as in the case of the displacement input in the rebound direction described above. The internal space formed between and the external space can be communicated with the external space, and the generation of abnormal sounds due to the discharged sound and suction sound when a large displacement is input in the bound direction can be suppressed.

  Here, the lower stopper portion 33 is provided with a fourth protrusion portion 33b2 (that is, a protrusion portion having a minimum protrusion height in the lower stopper portion 33) in the circumferential direction, and the fourth stopper portion 33 is additionally provided. A groove 33d is formed in the recess 33c2 located between the protrusions 33b2. Therefore, generation | occurrence | production of unusual noise can be suppressed more reliably.

  That is, when the displacement of the bottom plate 13a of the lower cup portion 13 is received by the lower stopper portion 33 in accordance with the displacement input in the bounce direction, the protrusions are compressed in order from the projecting height (that is, firstly, 3), the third protrusion 33b1 is compressed, and then the fourth protrusion 33b2 is compressed. Therefore, when a large displacement is input, the protrusion having a higher protrusion height (that is, the third protrusion 33b1) has a higher compressibility. Moreover, the surplus generated with compression also increases.

  In this case, since the protrusion having the minimum protrusion height (that is, the fourth protrusion 33b2) has a small volume and a minimum compression rate, the groove is formed in the recess 33c2 between the fourth protrusions 33b2. By providing the recess 33d, it is possible to suppress the groove 33d from being blocked by the excess wall. As a result, even when a large displacement is input, the effect of escaping air can be maintained, and the generation of abnormal noise can be more reliably suppressed.

  In addition, the groove 33d is provided in the recess 33c2 between the fourth protrusions 33b2 (projections having the minimum protrusion height) provided side by side, thereby reducing the cross-sectional area of the groove 33d. it can. Therefore, the volume (rubber volume) of the rubber-like elastic body in the vicinity of the concave portion 33c2 can be ensured accordingly, and the durability can be improved. Further, the concave portion 33c2 in which the groove portion 33d is provided is a portion where the number of repeated deformations (pressing by the bottom plate 13a of the lower cup portion 13) accompanying the displacement input and the amount of deformation at that time are the smallest, and accordingly, durability is increased accordingly. It is possible to improve the performance.

  Next, a strut mount according to the second embodiment will be described with reference to FIGS. In the first embodiment, the case where the groove portions 32d and 33d are provided in the recess portions 32c and 33c2 as air grooves has been described. However, the recess portion 232c3 in the second embodiment is not provided with a groove portion. 232c3 itself is configured to function as an air groove. In addition, the same code | symbol is attached | subjected about the part same as 1st Embodiment, and the description is abbreviate | omitted.

  FIG. 8 is a top view of the molded product H2 in the second embodiment. FIG. 8 shows a state before the fastening bolt B (see FIG. 2) is press-fitted and fixed to the molded product H2. Further, in FIG. 8, the concavo-convex shape of the upper stopper portion 232 is schematically illustrated in order to clarify the shape and facilitate understanding.

  The molded product H2 in the second embodiment has the same configuration as that of the anti-vibration base 230 except that the configuration of the anti-vibration base 230 of the molded product H1 in the first embodiment is different from that of the first embodiment. It is the same as the molded product H1 in the embodiment. Further, the anti-vibration base 230 in the second embodiment has other configurations except that the upper stopper portion 232 has a different configuration from the upper stopper portion 32 in the first embodiment. This is the same as the vibration proof substrate 30 in the first embodiment. The description of these same configurations is omitted.

  As shown in FIG. 8, the upper stopper portion 232 protrudes from the upper annular portion 32a and the projecting tip surface (the front side surface of FIG. 8) of the upper annular portion 32a and is distributed in the circumferential direction. The high protrusion part 232b1, the middle protrusion part 232b2, the low protrusion part 232b3, and the recessed parts 232c1 to 232c3 located between these protrusion parts 232b1 to 232b3 are provided.

  As shown in FIG. 8, the high protrusion 232b1, the middle protrusion 232b2, and the low protrusion 232b3 are distributed in the circumferential direction, and the protrusions 232b1 to 232b3 are separated by the recesses 232c1 to 232c3. . That is, each of the protrusions 232b1 to 232b3 protrudes from the upper surface of the upper annular portion 32a (protruding front end surface, front side surface of FIG. 8) in the axial direction shown in FIG. 8 as in the first embodiment. An annular shape centered on the axis O is formed into a shape divided by a plurality of recesses 232c1 to 232c3.

  In the present embodiment, two middle projecting portions 232b2 are disposed between the two low projecting portions 232b3, and one high projecting portion 232b1 is disposed between the two middle projecting portions 232b2. A group is formed as a group, and a plurality of groups (three groups in the present embodiment) are disposed in the circumferential direction.

  The high protrusion 232b1 and the middle protrusion 232b2 are separated by a recess 232c1, the middle protrusion 232b2 and the low protrusion 232b3 are separated by a recess 232c2, and the low protrusions 232b3 are separated by a recess 232c3. The concave portion 232c1 and the concave portion 232c2 are formed in a symmetrical shape with the high protruding portion 232b1 interposed therebetween, and the depths of the concave portions (the positions of the bottom surfaces of the concave portions 232c1 and 232c2 in the axial direction (vertical direction in FIG. 8)) are the same. It is said. On the other hand, the recessed depth of the recessed portion 232c3 is made deeper than the recessed depth of the recessed portions 232c1 and 232c2 (see FIG. 9B).

  Further, in the present embodiment, when viewed in the axial direction shown in FIG. 8, the central angle around the axis O of the middle protruding portion 232b2 and the low protruding portion 232b3 is the same, and the axis O of each of the recesses 232c1 to 232c3 The central angle with respect to is the same. The central angle of the high protrusion 232b1 is the largest, and the central angle is set to a small angle in the order of the middle protrusion 232b2, the low protrusion 232b3, and the recesses 232c1 to 232c3.

  Here, with reference to FIG. 9, the detailed structure of the upper stopper part 232 in 2nd Embodiment is demonstrated. 9A is a partially enlarged sectional view of the molded product H2 along the line IXa-IXa in FIG. 8, and FIG. 9B is a partially enlarged view of the molded product H2 along the line IXb-IXb in FIG. 9A. It is sectional drawing. 9A shows a state where the cross section taken along the line IXa-IXa in FIG. 8 is expanded in a plane, and FIG. 9B shows a cross section obtained by cutting the state expanded in the plane. The

  As shown in FIG. 9, the high projecting portion 232b1, the middle projecting portion 232b2, and the low projecting portion 232b3 are formed in a triangular section that projects upward from the upper annular portion 32a (upper side in FIG. 9B). It is formed. Note that the triangular section is formed such that the inner peripheral side (left side in FIG. 9B) is substantially perpendicular to the axis O (see FIG. 8) and the outer peripheral side (right side in FIG. 9B) is an upper ring from the top. It is formed to be inclined downward toward the upper surface of the portion 32a (protruding tip surface, upper surface in FIG. 9B).

  In the cross-sectional view shown in FIG. 9 (a), the high protrusion 232b1 has a maximum projecting height at a substantially central portion in the circumferential direction (FIG. 9 (a) left-right direction), and concave portions on both sides from the substantially central portion. It is formed as a projecting portion whose projecting height is inclined downward toward 232c1. Further, in the cross-sectional shape shown in FIG. 9B, the high protruding portion 232b1 is formed in the same shape as the triangular section that protrudes from the upper annular portion 32a.

  The middle projecting portion 232b2 and the low projecting portion 232b3 are projecting portions whose projecting height from the upper surface of the upper annular portion 32a (projecting tip surface, upper side surface in FIG. 9B) is lower than the high projecting portion 232b1. In the cross-sectional view shown in FIG. 9A, the protruding height is formed as a protruding portion that is substantially constant along the circumferential direction. Further, the middle projecting portion 232b2 and the lower projecting portion 232b3 have a shape in which the base side of the high projecting portion 232b1 is chamfered with a plane orthogonal to the axis O (see FIG. 8) in the sectional view shown in FIG. 9B. Formed as a protrusion. The protruding height of the middle protruding portion 232b2 is set to a dimension that is half or less than the protruding height of the high protruding portion 232b1, and is set to a dimension that is larger than the protruding height of the low protruding portion 232b3.

  The concave portion 232c1 is a concave portion having both side surfaces formed by the adjacent high protruding portion 232b1 and the middle protruding portion 232b2, and the concave portion 232c2 is formed by the adjacent middle protruding portion 232b2 and the low protruding portion 232b3. These recesses 232c1 and 232c2 have a shape that is curved in an arc shape with the maximum depth of the recess in the substantially central portion in the circumferential direction (FIG. 9 (a) left-right direction) in the cross-sectional view shown in FIG. 9 (a). It is formed as a recess.

  In addition, as for the cross-sectional shape of the recessed parts 232c1 and 232c2, the shape shown in FIG. 9A continues along the left-right direction of FIG. 9B. Further, the recessed depth (the position of the bottom surface in the axial direction (FIG. 9 (b) vertical direction)) of the recessed portions 232c1 and 232c2 is on the upper surface of the upper annular portion 32a (protruding tip surface, upper surface of FIG. The depth is not reached. Therefore, both ends of the recesses 232c1 and 232c2 in the extending direction are the above-described triangular triangular inner peripheral surface (left side in FIG. 9B) and outer peripheral surface (right side in FIG. 9 (b)) protruding from the upper annular portion 32a. Each is opened.

  The recess 232c3 is a recess in which both side surfaces are formed by the adjacent low protrusions 232b3. In the sectional view shown in FIG. 9A, the concave portion 232c3 has a shape having a bottom surface curved in an arc shape having a maximum concave depth at a substantially central portion in the circumferential direction (left and right direction in FIG. 9A). It is formed as a recess. Moreover, as for the cross-sectional shape of the recessed part 232c3, the shape shown to Fig.9 (a) continues along the left-right direction of FIG.9 (b).

  Here, the recessed depth (the position of the bottom surface in the axial direction (FIG. 9 (b) vertical direction)) of the recessed portion 232c3 exceeds the upper surface of the upper annular portion 32a (protruding tip surface, upper surface of FIG. 9 (b)). It is said to be deep. That is, the bottom surface side portion of the recess 232c3 formed in a semicircular shape in FIG. 9A is disposed at a position deeper than at least the upper surface of the upper annular portion 32a (lower side in FIG. 9B). Moreover, the end of one side in the extending direction of the recess 232c3 (right side in FIG. 9B) extends beyond the formation region of the projecting portions 232b1 to 232b3 to the outer peripheral side of the upper annular portion 32a.

  Therefore, the recess 232c3 is not only opened on the inner and outer peripheral surfaces of the portion projecting from the upper annular portion 32a and forming the high protruding portion 232b1, etc., but also on one end side (the left side in FIG. 9B) is the upper side. It opens to the inner peripheral surface of the annular portion 32a, and the other end side (right side in FIG. 9B) opens to the upper surface (protruding tip end surface, upper side surface in FIG. 9B) of the upper annular portion 32a.

  As described above, the upper stopper portion 232 in the second embodiment includes the upper annular portion 32a and the protruding portions 232b1 that protrude from the upper surface (projecting tip surface) of the upper annular portion 32a and are distributed in the circumferential direction. Since the projections 232b1 to 232b3 and the upper annular portion 32a are sequentially compressed in the same manner as in the first embodiment, when the displacement is input in the rebound direction, the displacement input is performed. Along with this, it is possible to obtain nonlinear characteristics in which the spring constant gradually increases.

  In this case, the upper stopper portion 232 in the second embodiment is formed through the groove portion 32d in the first embodiment because the concave portion 232c3 has a larger depth than the other concave portions 232c1 and 232c2. In the same manner as described above, the internal space formed between the upper stopper portion 232 and the inner member 10 (see the upper cup portion 12, see FIG. 2) can be communicated with the external space via the recess portion 232c3. In addition, it is possible to suppress the generation of abnormal noise due to the discharge sound and suction sound when a large displacement is input in the bound direction.

  Here, in the second embodiment, the low protruding portion 232b3 (that is, the protruding portion having the minimum protruding height in the upper stopper portion 232) is provided in the circumferential direction, and the low protruding portion 232b3 provided side by side. By increasing the recess depth of the recess 232c3 positioned between the two, it is used as an air groove for letting air escape. Therefore, generation | occurrence | production of unusual noise can be suppressed more reliably.

  That is, when the displacement of the flange plate 12a of the upper cup portion 12 is received by the upper stopper portion 232 in accordance with the displacement input in the rebound direction, the protrusions are compressed in order from the projecting portion having the highest projecting height (that is, first, The high protrusion 232b1 is compressed, then the middle protrusion 232b2 is compressed, and finally the low protrusion 232b3 is compressed. Therefore, when a large displacement is input, the protrusion having a high protrusion height (that is, the high protrusion) 232b1 side), the compression rate increases, and the surplus generated with compression increases.

  In this case, since the protrusion having the minimum protrusion height (that is, the low protrusion 232b3) has a small volume and a minimum compression rate, the recess 232c3 between the low protrusions 232b3 has a surplus. Is prevented from being blocked. Therefore, by increasing the recessed depth of the recess 232c3 and using it as an air groove, the effect of escaping air is maintained even when a large displacement is input, and the generation of abnormal noise is more reliably suppressed. it can.

  The recessed portion 232c3 used as the air groove is recessed to a position deeper than the upper surface of the upper annular portion 32a (projecting tip surface, upper side surface in FIG. 9B), and one end side of the upper annular portion 32a. Since it opens to the inner peripheral surface and the other end opens to the upper surface (projecting tip surface) of the upper annular portion 32a, a large displacement is input, and the upper stopper portion 232 is enlarged by the flange plate 12a of the upper cup portion 12. Even if it is crushed, the concave portion 232c3 can be prevented from being blocked by the excess wall, and the role of air can be reliably exerted.

  That is, even when a large displacement is input, the recess 232c3 secures a passage that communicates the internal space formed between the inner member 10 (upper cup portion 12, see FIG. 2) and the upper stopper portion 232 with the outer space. Air can be surely released, and as a result, the generation of abnormal noise can be more reliably suppressed.

  Moreover, since the recessed part 232c3 is a part where the number of repeated deformations (pressing by the flange plate 12a of the upper cup part 12) accompanying the displacement input and the amount of deformation at that time are the smallest, the durability is improved accordingly. Can do.

  Furthermore, in the second embodiment, since it is not necessary to provide a narrow groove (for example, the groove 32d shown in FIG. 6A), it is possible to suppress a decrease in durability due to stress concentration. Moreover, since it is not necessary to provide a small convex part in the vulcanization mold in order to provide the groove part, the manufacturing cost and maintenance cost of the vulcanization mold can be reduced accordingly.

  Next, a strut mount in the third embodiment will be described with reference to FIG. In the first embodiment, the description has been given of the case where the recessed depth of the groove portion 32d is set to a depth that does not reach the upper surface of the upper annular portion 32a. However, the groove portion 332d in the third embodiment is an upper surface of the upper annular portion 32a. It is recessed to a depth position exceeding. In addition, the same code | symbol is attached | subjected about the part same as 1st Embodiment, and the description is abbreviate | omitted.

  FIG. 10A is a partially enlarged cross-sectional view of a molded product H3 in the third embodiment, and FIG. 10B is a partially enlarged cross-sectional view of the molded product H3 taken along line Xb-Xb in FIG. 10A. It is. 10A corresponds to FIG. 6A, and FIG. 10B corresponds to FIG. 6B.

  In the molded product H3 in the third embodiment, the configuration of the upper stopper portion 332 of the vibration isolation base 330 is different from the upper stopper portion 32 of the vibration isolation base 30 of the molded product H1 in the first embodiment (specifically, Except for the point that the recessed depth of the groove portion 332d in the third embodiment is deeper than the recessed depth of the groove portion 32d in the first embodiment), the other configuration is the molded product in the first embodiment. Since it is the same as H1, its description is omitted.

  As shown in FIG. 10, the groove portion 332d in the third embodiment has a concave depth (a position in the axial direction of the bottom surface (vertical direction in FIG. 10B)) of the upper annular portion 32a (protruding tip). Surface, and the depth exceeding the upper surface in FIG. That is, the bottom surface side portion of the groove portion 332d formed in a semicircular shape in FIG. 10A is disposed at a position deeper than the upper surface of the upper annular portion 32a (lower side in FIG. 10B). Further, the end portion of the groove portion 332d on one side in the extending direction (right side in FIG. 10B) extends beyond the formation region of the projecting portions 32b1 and 32b2 to the outer peripheral side of the upper annular portion 32a. Therefore, the groove 332d is not only opened on the inner and outer peripheral surfaces of the portion projecting from the upper annular portion 32a and forming the first projecting portion 32b1 and the like, but also on one end side (left side in FIG. 10 (b)). It opens to the inner peripheral surface of the upper annular portion 32a, and the other end side (right side in FIG. 10B) opens to the upper surface (projecting tip surface, upper side surface in FIG. 10B) of the upper annular portion 32a.

  As described above, in the upper stopper portion 332 in the third embodiment, the recessed depth of the groove portion 332d used as an air groove is deeper than in the first embodiment, and one end side is the inner portion of the upper annular portion 32a. Since it opens to the peripheral surface and the other end opens to the upper surface (projecting tip surface) of the upper annular portion 32a, a large displacement is input, and the upper stopper portion 332 is largely pushed by the flange plate 12a of the upper cup portion 12. Even if it is crushed, the internal space formed between the inner member 10 (see the upper cup portion 12 and FIG. 2) and the upper stopper portion 332 is prevented from being blocked by the extra space, so that the groove portion 332d is blocked by the extra space. The channel 332d can secure a passage communicating with the. Thereby, the role which escapes air can be exhibited reliably, As a result, generation | occurrence | production of abnormal noise can be suppressed more reliably.

  The present invention has been described above based on the embodiments. However, the present invention is not limited to the above embodiments, and various improvements and modifications can be made without departing from the spirit of the present invention. It can be easily guessed.

  The numerical values described in the above embodiments are merely examples, and other numerical values can naturally be adopted. For example, in the first embodiment, when the adjacent first protrusion 32b1 and second protrusion 32b2 are set as one group, the case where the number of groups is four is described. It may be 3 or less, or 5 or more. The number of protrusions constituting one group can be arbitrarily set. Moreover, although the case where the number of the groove parts 32d was set to 2 was demonstrated, the number of the groove parts 32d may be set to 1, or may be 3 or more. Since the same applies to other embodiments, the description thereof will be omitted.

  The shapes of the protrusions 32b1, etc., the recesses 32c, etc. and the grooves 32d described in the above embodiments are merely examples, and other shapes can naturally be adopted.

  In each of the above-described embodiments, the case where the upper stopper portions 32, 232, 332 and the lower stopper portion 33 are configured differently has been described. However, the present invention is not necessarily limited to this, and it is naturally possible to have the same configuration. It is. Moreover, you may comprise combining the upper stopper part 32,232,332 and the lower stopper part 33 in each embodiment.

1 Strut Mount 10 Inner Member 11 Tube Part (Part of Inner Member)
12 Upper cup part (a part of the inner member)
12a Flange plate (stopper plate)
13 Lower cup part (part of inner member)
13a Bottom plate (stopper plate)
20 Outer member 30, 230, 330 Anti-vibration base 32, 232, 332 Upper stopper part (rubber stopper part)
32a Upper annular part (annular base part)
32b1 First protrusion 32b2 Second protrusion 32c Recess 32d Groove 33 Lower stopper (rubber stopper)
33a Lower annular part (annular base part)
33b1 Third protrusion 33b2 Fourth protrusion (minimum protrusion)
33c1 Concave part 33c2 Concave part (concave part located between minimum protrusion parts)
33d, 332d Groove (groove formed in the recess located between the minimum protrusions)
232b1 High protrusion 232b2 Medium protrusion 232b3 Low protrusion (minimum protrusion)
232c1, 232c2 recess 232c3 recess (minimum recess)
R rod

Claims (4)

An inner member attached to the rod tip of the shock absorber, an outer member attached to the vehicle body, a vibration-proof base that connects the inner member and the outer member and is made of a rubber-like elastic body, and has a stopper plate portion In the strut mount that the vibration-proof base includes the rubber stopper portion that receives the stopper plate portion and includes the inner member,
The rubber stopper is
An annular base portion projecting toward the stopper plate portion of the inner member and continuing in the circumferential direction;
A plurality of projecting portions that are projected from the projecting tip surface of the annular base and are distributed in the circumferential direction;
A strut mount, comprising: a groove-like groove portion that is provided in a bottom surface of a concave portion located between the plurality of projecting portions and extends along a radial direction of the annular base portion.   The rubber stopper portion includes a plurality of the protruding portions having different protruding heights from the protruding front end surface of the annular base portion, and the minimum protruding height that minimizes the protruding height of the plurality of protruding portions. 2. The strut mount according to claim 1, wherein the groove portion is provided in a circumferential direction, and the groove portion is provided in a recessed portion located between the provided minimum projecting portions. An outer member that is attached to the tip of the rod of the shock absorber, an outer member that is attached to the vehicle body, a vibration-proof base that connects the inner member and the outer member and is made of a rubber-like elastic body, and radially outward In the strut mount that the inner member is provided with a stopper plate portion that protrudes to the rubber plate and that the vibration-proof base includes a rubber stopper portion that receives the stopper plate portion,
The rubber stopper is
An annular base portion projecting toward the stopper plate portion of the inner member and continuing in the circumferential direction;
A plurality of projecting portions that protrude from the projecting tip surface of the annular base and are distributed in the circumferential direction, and have different projecting heights from the projecting tip surface of the annular base,
Among the plurality of protrusions, a minimum protrusion having the minimum protrusion height is provided in the circumferential direction, and the plurality of protrusions are provided in the plurality of recesses located between the plurality of protrusions. A strut mount characterized in that the recess depth between the minimum protrusions located between the minimum protrusions is maximized.   The groove portion according to claim 1 or 2 or the recess between the minimum intervals according to claim 3 is recessed to a position deeper than the projecting tip surface of the annular base, and one end side is open to the inner peripheral surface of the annular base. The strut mount according to any one of claims 1 to 3, wherein the other end side opens to a protruding front end surface of the annular base portion.

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