JP7284715B2 - strut mount - Google Patents

Description

The present invention relates to strut mounts.
This application claims priority based on Japanese Patent Application Nos. 2018-008706 and 2018-008708 filed in Japan on January 23, 2018, the contents of which are incorporated herein.

Conventionally, for example, as shown in Patent Document 1 below, an inner member to which the upper end of the rod of the shock absorber is fixed, and an outer member that surrounds the inner member in the circumferential direction along the rod axis and is attached to the vehicle body side. , and an elastic body disposed between the inner member and the outer member to support the inner member and the outer member so that the inner member and the outer member can be elastically displaced relative to each other.
Conventionally, an inner member to which the upper end of the rod of the shock absorber is fixed, an outer member that encloses the inner member in the circumferential direction along the rod axis and is attached to the vehicle body, and a space between the inner member and the outer member. A strut mount is known that includes an elastic body that is disposed in and supports the inner member and the outer member so that they can be elastically displaced relative to each other.
As a strut mount of this type, for example, as shown in Patent Document 2 below, an elastic body is a laminated portion in which an elastic member and a rigid member are alternately laminated in the radial direction in a vertical cross-sectional view along the axial direction of the rod. and the rigid member is formed in a plate shape having a thickness in the radial direction. According to this strut mount, the spring constant in the radial direction that intersects the rod axis when viewed from the rod axis direction is higher than the spring constant in the rod axis direction, achieving both comfortable ride comfort and steering stability. be able to.

Japanese Patent Application Laid-Open No. 2001-124130 Japanese Patent Application Laid-Open No. 2008-150037

However, in the conventional strut mount, it is difficult to vary the radial spring constant intersecting the rod axis when viewed from the rod axis direction for each position in the circumferential direction. There is room for improvement in increasing the axial spring constant.

However, in the conventional strut mount, when the inner member and the outer member are relatively displaced in the axial direction of the rod, the elastic member undergoes shear deformation mainly in the axial direction of the rod and is difficult to deform in other directions. There is a problem that it is difficult to ensure the amount of elastic deformation in the axial direction. As a means for solving such a problem, for example, it is conceivable to increase the number of rigid members, but in this case, the radial thickness of each of the rigid members and the elastic members becomes thin, making manufacturing difficult. .

The present invention has been made in view of the circumstances described above. It is an object of the present invention to provide a strut mount that can be increased to

Further, the present invention has been made in view of the circumstances described above, and is capable of reliably increasing the spring constant in the radial direction relative to the spring constant in the axial direction of the rod, and An object of the present invention is to provide a strut mount capable of securing an elastic deformation amount.

A first aspect of the strut mount according to the present invention includes an inner member to which the upper end of the rod of the shock absorber is fixed, and an outer member that surrounds the inner member in the circumferential direction along the rod axis and is attached to the vehicle body. and an elastic body disposed between the inner member and the outer member and supporting the inner member and the outer member so as to be elastically displaceable relative to each other, wherein the elastic body comprises: A lamination section in which elastic members and rigid members are alternately laminated in a radial direction, and a single layer section composed of the elastic member and arranged at a position different from the lamination section in the circumferential direction. .

A second aspect of the strut mount according to the present invention includes an inner member to which the upper end of the rod of the shock absorber is fixed, and an outer member that surrounds the inner member in the circumferential direction along the rod axis and is attached to the vehicle body. and an elastic body disposed between the inner member and the outer member and supporting the inner member and the outer member so as to be elastically displaceable relative to each other, wherein the elastic body comprises: A lamination portion in which an elastic member and a rigid member are alternately laminated in a radial direction is provided, and the rigid member is arranged on the front and rear surfaces facing the rod axis direction and on the outer circumference of the inner member in a cross-sectional view orthogonal to the rod axis. It is formed in a block shape having an inner surface extending along the surface and an outer surface extending along the inner peripheral surface of the outer member.

According to the present invention, it is possible to easily vary the radial spring constant for each position in the circumferential direction, and to reliably increase the spring constant in the axial direction of the rod. Moreover, according to the present invention, it is possible to reliably increase the spring constant in the radial direction relative to the spring constant in the axial direction of the rod, and to secure the amount of elastic deformation of the laminated portion in the axial direction of the rod.

FIG. 2 is a vertical cross-sectional view along the left-right direction of the vehicle, showing a state in which a shock absorber is attached to the strut mounts according to the first and second embodiments of the present invention; FIG. 2 is a vertical cross-sectional view along the vehicle front-rear direction, showing a state in which a shock absorber is attached to the strut mounts according to the first and second embodiments of the present invention; Figure 3 is a semi-cross-sectional view of the strut mount shown in Figures 1 and 2; 2 is an enlarged view of the strut mount shown in FIG. 1, showing the inner and outer members displaced relative to each other in the axial direction of the rod; FIG. FIG. 5 is a schematic diagram of load displacement curves obtained when the inner member and the outer member are relatively displaced in the axial direction of the rod in the strut mounts according to the first and second embodiments of the present invention;

A first embodiment of a strut mount 10 according to the present invention will now be described with reference to FIGS. 1 to 5. FIG.
First, the shock absorber 21 attached to the strut mount 10 and the vehicle body side panel 31 to which the strut mount 10 is attached will be described.

The shock absorber 21 has a rod 22 , a cylinder 23 , and a sealing body 24 that extends substantially vertically and prevents the fluid in the cylinder 23 from leaking from the upper end opening of the cylinder 23 . Rod 22, cylinder 23, and seal body 24 are arranged coaxially with a common axis. Hereinafter, this common axis is referred to as the rod axis O, the direction crossing the rod axis O as viewed from the direction of the rod axis O is referred to as the radial direction, and the direction rotating around the rod axis O is referred to as the circumferential direction.

The rod 22 projects upward from the cylinder 23 . A portion of the rod 22 protruding upward from the cylinder 23 is surrounded from the radially outer side by a bump stopper 36 . A male thread is formed at the upper end of the rod 22 .
The seal body 24 is arranged inside the upper end portion of the cylinder 23 . The spring constant of the seal body 24 is such that, in the shock absorber 21 alone, the rod 22 and the cylinder 23 are moved in the direction of the rod axis O while elastically deforming the seal body 24 in a state where the rod 22 does not slide against the seal body 24. It can be obtained from the relationship between the load and displacement obtained when relative displacement is performed.

The vehicle body side panel 31 includes a bottomed cylindrical body portion 32 in which the strut mount 10 is accommodated, an annular lid body 33 disposed at the upper end portion of the body portion 32 , and radially extending from the body portion 32 . A flange portion 34 that protrudes outward and extends over the entire circumference, and a lower tubular portion 35 that protrudes downward from the body portion 32 . The main body portion 32, the lid body 33, the flange portion 34, and the lower cylindrical portion 35 are arranged coaxially with the rod axis O. As shown in FIG.

A bottom wall of the body portion 32 is formed in an annular shape coaxial with the rod axis O. As shown in FIG. The upper end of the rod 22 of the shock absorber 21 is inserted inside the bottom wall.
An upper end portion of a bump stopper 36 is fitted in the lower cylindrical portion 35 .
An annular strut bearing 37 is externally fitted to a portion of the body portion 32 located below the flange portion 34 . The lower surface of the strut bearing 37 supports the upper end of the coil spring 38 .

The strut mount 10 includes an inner member 11 to which the upper end of the rod 22 is fixed, an outer member 12 that surrounds the inner member 11 in the circumferential direction and is attached to the vehicle body, and is arranged between the inner member 11 and the outer member 12 . and an elastic body 13 provided to support the inner member 11 and the outer member 12 so as to be relatively elastically displaceable.

The outer member 12 is formed in a tubular shape and is fitted into the body portion 32 of the vehicle body side panel 31 .
The outer member 12 is cylindrically formed. The outer member 12 is made of, for example, a metal material.
The inner member 11 is made of, for example, a metal material, and has a mounting hole 11c into which the upper end of the rod 22 is inserted. A shock absorber 21 is attached to the strut mount 10 by screwing a nut 25 onto a portion of the upper end of the rod 22 that protrudes upward from the inner member 11 . The mounting hole 11c is arranged coaxially with the rod axis O. As shown in FIG. The size of the inner member 11 in the rod axis O direction is smaller than the size of the outer member 12 in the rod axis O direction. The outer peripheral surface of the inner member 11 is spaced radially inward from the inner peripheral surface of the outer member 12 .

As shown in FIG. 3, the elastic body 13 is composed of a laminated portion 16 in which elastic members 14 and rigid members 15 are alternately laminated in the radial direction, and an elastic member 14. and a single layer portion 17 arranged at different directional positions. For example, the elastic member 14 is formed of a rubber material or the like, and the rigid member 15 is formed of a synthetic resin material or the like having a lower hardness than the material forming the inner member 11 and a higher hardness than the material forming the elastic member 14. there is The elastic member 14 is vulcanized and bonded to the rigid member 15 , the inner member 11 and the outer member 12 .

A plurality of laminated portions 16 and a plurality of single layer portions 17 are provided. In the illustrated example, two laminated portions 16 are separately provided on both sides of the rod axis O in the radial direction, and two single layer portions 17 are separately provided on both sides of the rod axis O in the radial direction. It is The laminated portions 16 are individually arranged on both sides of the rod axis O in the lateral direction X of the vehicle, and the single layer portions 17 are separately arranged on both sides of the rod axis O in the longitudinal direction Y of the vehicle. The circumferential sizes of the laminated portion 16 and the single layer portion 17 are equal to each other. The maximum value of the radial size of the laminated portion 16 is larger than the maximum value of the radial size of the single layer portion 17 . The radial size of each of the laminated portion 16 and the single layer portion 17 is the radial distance between the outer peripheral surface of the inner member 11 and the inner peripheral surface of the outer member 12 . The radial size of the single layer portion 17 is uniform over the entire circumference.

In the laminated portion 16 , the elastic members 14 are separately arranged between the rigid member 15 and the inner member 11 and between the rigid member 15 and the outer member 12 . The total radial thickness of the plurality of elastic members 14 in the laminated portion 16 is equal to the radial thickness of the elastic members 14 in the single layer portion 17 . In the laminated portion 16 , the radial thickness of the elastic member 14 positioned between the rigid member 15 and the inner member 11 is equal to the radial thickness of the elastic member 14 positioned between the rigid member 15 and the outer member 12 . thinner than In the laminated portion 16 , the radial thickness of each elastic member 14 is smaller than the radial size of the rigid member 15 .

As shown in FIGS. 3 and 4, the rigid member 15 extends along front and back surfaces 15a and 15b facing the direction of the rod axis O and along the outer peripheral surface of the inner member 11 in a cross-sectional view orthogonal to the rod axis O. It is formed in a block shape having an inner side surface 15 c and an outer side surface 15 d extending along the inner peripheral surface of the outer member 12 . The rigid member 15 is formed in a rectangular parallelepiped shape extending in the circumferential direction. In the illustrated example, the rigid member 15 is formed in a rectangular parallelepiped shape extending in the longitudinal direction Y of the vehicle. In the cross-sectional view, the inner side surface 15c of the rigid member 15 extends straight in the vehicle front-rear direction Y, and the outer side surface 15d of the rigid member 15 presents a curvilinear shape that protrudes outward in the vehicle left-right direction X. As shown in FIG.

The rigid member 15 is formed with a positioning hole 15e through which a positioning pin of a mold device is inserted when the elastic member 14 is vulcanized. The front and back surfaces 15a and 15b of the rigid member 15 are covered with a rubber film integrally formed with the elastic member 14, and the rubber film is also formed with a through hole communicating with the positioning hole 15e.

On the outer peripheral surface of the inner member 11, a portion (hereinafter referred to as an overhang portion 11a) connecting to the single layer portion 17 in the radial direction is radially wider than a portion connecting to the laminated portion 16 (hereinafter referred to as a relief portion 11b) in the radial direction. It protrudes outward. The protruding portion 11a presents a curvilinear shape protruding in the vehicle front-rear direction Y in the cross-sectional view. The relief portion 11b extends straight in the vehicle front-rear direction Y in the cross-sectional view. The radial distance between the circumferential central portion of the relief portion 11b and the rod axis O is smaller than the radius of the projecting portion 11a. The inner member 11 has a rectangular shape elongated in the vehicle front-rear direction Y when viewed from the rod axis O direction. The volume of inner member 11 is greater than the volume of rigid member 15 .

Both end portions of the inner side surface 15c of the rigid member 15 in the vehicle front-rear direction Y face the relief portions 11b of the inner member 11 in the vehicle left-right direction X. As shown in FIG. In the central portion in the vehicle front-rear direction Y, the radial distance between the inner peripheral surface of the mounting hole 11c of the inner member 11 and the relief portion 11b is the same as the radial distance between the inner surface 15c and the outer surface 15d of the rigid member 15. are equal.

As shown in FIG. 4, in a vertical cross-sectional view along the direction of the rod axis O, either one of the inner side surface 15c of the rigid member 15 and the escape portion 11b of the inner member 11 is curved toward the other. and one of them has a concave curve along one side. In the illustrated example, the relief portion 11b of the inner member 11 presents a curvilinear shape projecting toward the inner side surface 15c of the rigid member 15, and the inner side surface 15c of the rigid member 15 extends toward the inner side surface 15c of the inner member 11 in the longitudinal cross-sectional view. It has a concave curved shape along the relief portion 11b.

Here, the sizes of the rigid member 15 and the inner member 11 in the direction of the rod axis O are equal to each other. The central portions of the rigid member 15 and the inner member 11 in the direction of the rod axis O match each other.
A portion of the inner side surface 15 c of the rigid member 15 that is positioned most radially outward is positioned at the central portion of the rigid member 15 in the rod axis O direction. In the relief portion 11 b of the inner member 11 , the radially outermost portion is located at the central portion of the inner member 11 in the rod axis O direction.
In the vertical cross-sectional view, the outer side surface 15d of the rigid member 15 presents a curvilinear shape that protrudes toward the inner peripheral surface of the outer member 12 . A portion of the outer side surface 15 d of the rigid member 15 that is positioned radially outward is positioned at the center of the rigid member 15 in the rod axis O direction.

As shown in FIGS. 2 and 3, stopper elastic bodies 18 capable of coming into contact with the vehicle body are provided on the front and rear surfaces of the inner member 11 facing the direction of the rod axis O. As shown in FIGS. The stopper elastic body 18 is formed in the shape of a ridge extending in the circumferential direction. The stopper elastic bodies 18 are separately arranged on the outer peripheral edges of the front and back surfaces of the inner member 11 , which are connected to the single layer portion 17 of the elastic body 13 in the radial direction. In the illustrated example, the stopper elastic body 18 is arranged over the entire area of the outer peripheral edge portions of the front and back surfaces of the inner member 11, which are connected to the projecting portion 11a. The stopper elastic body 18 is in contact with the upper surface of the bottom wall of the body portion 32 and the lower surface of the lid 33 of the vehicle body side panel 31 . The stopper elastic body 18 is formed integrally with the elastic member 14 .

In the strut mount 10 alone, the load-displacement curve obtained when the inner member 11 and the outer member 12 are relatively displaced in the direction of the rod axis O is, as shown in FIG. and a second line portion L2 connected to the first line portion L1 and having a tangent line smaller in inclination than the tangent line of the first line portion L1.

In this load-displacement curve, the load increases as the amount of displacement increases, and the slope of the tangential line, that is, the spring constant, is greater at the first line portion L1 than at the second line portion L2. The first line portion L1 and the second line portion L2 extend linearly. The mechanical properties of the elastic body 13 predominantly appear in the first wire portion L1 and the second wire portion L2.

In the illustrated example, the load-displacement curve has a third line portion L3 that indicates a state in which the displacement has increased from the second line portion L2, and the mechanical properties of the stopper elastic body 18 are dominant in the third line portion L3. , and the inclination of the tangent line is greater than that of the tangent line of the second line portion L2. The third line portion L3 extends linearly.
In the shock absorber 21 alone, the load in the direction of the rod axis O required for the rod 22 to slide on the seal body 24 is substantially constant regardless of the amount of displacement of the rod 22. It is included in the load range where the line portion L2 is located. Also, the inclination of the tangential line of the second line portion L2 is less than or equal to the spring constant of the seal body 24 .

As described above, according to the strut mount 10 according to the present embodiment, since the elastic body 13 includes the laminated portion 16 having the rigid member 15, the elastic body 13 is laminated with respect to the rod axis O in the radial direction. The spring constant in the direction toward the side where the portion 16 is located, that is, in the vehicle left-right direction X can be reliably increased, and the spring constant in the vehicle left-right direction X is made higher than the spring constant in the rod axis O direction. be able to.

In addition, since the laminated portion 16 is configured by alternately laminating the elastic members 14 and the rigid members 15 in the radial direction, depending on the size of the rigid members 15 occupying the laminated portion 16, It becomes possible to vary the spring constant, and the spring constant can be adjusted easily and accurately.
In addition, since the elastic body 13 includes not only the laminated portion 16 but also the single layer portion 17, it is possible to easily vary the radial spring constant for each position in the circumferential direction.

Further, on the outer peripheral surface of the inner member 11, the protruding portion 11a radially connected to the single layer portion 17 protrudes radially outward from the relief portion 11b radially connected to the laminated portion 16. Among them, it is possible to increase the spring constant in the direction toward the side where the single layer portion 17 of the elastic body 13 is located with respect to the rod axis O, that is, in the longitudinal direction Y of the vehicle. The constant can be high relative to the spring constant in the rod axis O direction. As a result, it is possible to prevent the radial spring constant of the strut mount 10 from being excessively different at each position in the circumferential direction.

Moreover, since the rigid member 15 includes the inner side surface 15c extending along the outer peripheral surface of the inner member 11 and the outer side surface 15d extending along the inner peripheral surface of the outer member 12 in the lateral cross-sectional view, the rigid member 15 and the inner member 11 and the outer member 12, the spring constant of the laminated portion 16 in the lateral direction X of the vehicle can be reliably increased while suppressing the load applied to each elastic member 14 positioned between the inner member 11 and the outer member 12.
Further, since the rigid member 15 is formed in a block shape rather than a plate having a thickness in the radial direction, the rigidity of the rigid member 15 in the radial direction is surely increased, and the laminated portion 16 is formed in the lateral direction X of the vehicle. can reliably increase the spring constant of

In addition, since the rigid member 15 is formed in the block shape rather than in a plate-like shape having a thickness in the radial direction, the size of the rigid member 15 in the radial direction is ensured. is relatively displaced in the direction of the rod axis O, the rigid member 15 is not rigidly displaced in the direction of the rod axis O, but is displaced so as to be inclined with respect to the rod axis O as shown in FIG. As a result, the elastic member 14 of the laminated portion 16 can be not only shear-deformed in the direction of the rod axis O, but also tensile-deformed in a direction inclined with respect to the rod axis O. The amount of elastic deformation in the direction can be secured.

In addition, since the stopper elastic bodies 18 are arranged on the front and back surfaces of the inner member 11, when the inner member 11 and the outer member 12 tend to relatively displace greatly in the direction of the rod axis O, the inner member 11 comes into contact with the vehicle body side via the stopper elastic body 18 . Therefore, it is possible to reliably prevent the inner member 11 and the outer member 12 from relatively displacing in the rod axis O direction.
Moreover, since the stopper elastic body 18 is arranged not in the laminated part 16 having the rigid member 15 in the inner member 11 but in the part that is connected to the single layer part 17 in the radial direction, the stopper elastic body 18 is arranged. space can be easily secured.

The technical scope of the present invention is not limited to the above embodiments, and various modifications can be made without departing from the gist of the present invention.

Although the outer peripheral surface of the inner member 11 has the projecting portion 11a and the escape portion 11b in the first embodiment, an inner member having the same outer diameter over the entire circumference may be employed.
Although the block-shaped rigid member 15 is shown in the first embodiment, a plate-shaped rigid member having a thickness in the radial direction may be employed.

In the first embodiment, one of the inner side surface 15c of the rigid member 15 and the relief portion 11b of the inner member 11 presents a curvilinear shape that protrudes toward the other in the vertical cross-sectional view. or the other has a concave curve shape along one side, but this is not limiting. The configuration may be changed as appropriate.
In the first embodiment, the outer side surface 15d of the rigid member 15 has a curved shape that protrudes toward the inner peripheral surface of the outer member 12 in the longitudinal cross-sectional view. The outer surface 15d of the rigid member 15 may be changed as appropriate, such as a configuration in which the outer surface 15d extends in the rod axis O direction.
In the first embodiment, the inclination of the tangent to the second line portion L2 is less than or equal to the spring constant of the seal body 24. It may be larger than the spring constant.

According to this invention, since the elastic body includes the laminated portion having the rigid member, the laminated portion of the elastic body is positioned with respect to the rod axis in the radial direction intersecting the rod axis when viewed from the rod axis direction. It is possible to reliably increase the spring constant in the direction toward the rod (hereinafter referred to as the first direction), and the spring constant in the first direction can be made higher than the spring constant in the axial direction of the rod.
In addition, since the laminated portion is configured by alternately laminating the elastic member and the rigid member in the radial direction, the spring constant in the first direction is varied according to the size of the rigid member occupying the laminated portion. This makes it possible to adjust the spring constant easily and accurately.
In addition, since the elastic body includes not only the laminated portion but also the single layer portion, it is possible to easily vary the spring constant in the radial direction for each position in the circumferential direction.

Here, on the outer peripheral surface of the inner member, a portion radially connected to the single layer portion may protrude radially outward from a portion radially connected to the laminated portion.

In this case, on the outer peripheral surface of the inner member, the portion radially connected to the single layer portion protrudes radially outward from the portion radially connected to the laminated portion. It is possible to increase the spring constant in the direction toward the side where the single layer portion of the elastic body is located (hereinafter referred to as the second direction), and the spring constant in the second direction is made higher than the spring constant in the axial direction of the rod. can be made higher. As a result, it is possible to prevent the radial spring constant of the strut mount from being excessively different at each position in the circumferential direction.

In addition, the rigid member includes front and back surfaces facing the rod axis direction, inner side surfaces extending along the outer peripheral surface of the inner member in a cross-sectional view perpendicular to the rod axis, and along the inner peripheral surface of the outer member. It may be formed in a block shape with an extending outer surface.

In this case, the rigid member has an inner surface extending along the outer peripheral surface of the inner member and an outer surface extending along the inner peripheral surface of the outer member in the cross-sectional view. and the outer member, the spring constant of the laminated portion in the first direction can be reliably increased while suppressing the load applied to each elastic member positioned between the outer member and the outer member.
In addition, since the rigid member is formed in a block shape rather than a plate having a thickness in the radial direction, the rigidity of the rigid member in the radial direction is reliably increased, and the spring constant of the laminated portion in the first direction is increased. can be definitely increased.
In addition, since the rigid member is formed in the block-like shape rather than in a plate-like shape having a thickness in the radial direction, the size of the rigid member in the radial direction is ensured. When displacing in the axial direction of the rod, the rigid member is not rigidly displaced in the axial direction of the rod, but is displaced so as to be inclined with respect to the axis of the rod. In addition, it is possible to cause tensile deformation in a direction inclined with respect to the rod axis, so that the amount of elastic deformation of the laminated portion in the rod axis direction can be secured.

Further, in the inner member, stopper elastic bodies capable of coming into contact with the vehicle body may be disposed on front and back surfaces of a portion that is radially connected to the single layer portion.

In this case, since the stopper elastic bodies are provided on the front and rear surfaces of the inner member, the inner member acts against the stopper elastic body when the inner member and the outer member are relatively displaced in the rod axial direction. It comes into contact with the vehicle body side through. Therefore, it is possible to reliably prevent the inner member and the outer member from relatively displacing in the axial direction of the rod.
In addition, since the stopper elastic body is arranged not in the laminated part having the rigid member but in the portion of the inner member that is radially connected to the single layer part, a space for arranging the stopper elastic body can be easily secured. can do.

A second embodiment of the strut mount 10 according to the present invention will be described below with reference to FIGS. 1 to 5, similarly to the first embodiment. The parts similar to those of the first embodiment are omitted, and only different points are described.

In the second embodiment of the strut mount 10 according to the present invention, the rigid member 15 has an inner surface 15c extending along the outer peripheral surface of the inner member 11 and along the inner peripheral surface of the outer member 12 in the cross-sectional view. , and the outer side surface 15d that extends, the load applied to each elastic member 14 positioned between the rigid member 15 and the inner member 11 and the outer member 12 is suppressed, and the spring of the laminated portion 16 in the vehicle left-right direction X is reduced. You can definitely increase the constant.
Further, since the rigid member 15 is formed in a block shape rather than a plate having a thickness in the radial direction, the rigidity of the rigid member 15 in the radial direction is surely increased, and the laminated portion 16 is formed in the lateral direction X of the vehicle. can reliably increase the spring constant of

In addition, since the rigid member 15 is formed in the block shape rather than in a plate-like shape having a thickness in the radial direction, the size of the rigid member 15 in the radial direction is ensured. is relatively displaced in the direction of the rod axis O, the rigid member 15 is not rigidly displaced in the direction of the rod axis O, but is displaced so as to be inclined with respect to the rod axis O as shown in FIG. As a result, the elastic member 14 of the laminated portion 16 can be not only shear-deformed in the direction of the rod axis O, but also tensile-deformed in a direction inclined with respect to the rod axis O. The amount of elastic deformation in the direction can be secured.

Further, in the vertical cross-sectional view, one of the inner side surface 15c of the rigid member 15 and the relief portion 11b of the inner member 11 presents a curvilinear shape projecting toward the other, and the other , the load applied to the elastic member 14 positioned between the inner member 11 and the rigid member 15 can be suppressed when the inner member 11 and the outer member 12 are displaced relative to each other. , durability can be ensured.

In addition, in the vertical cross-sectional view, the outer side surface 15d of the rigid member 15 exhibits a curvilinear shape that protrudes toward the inner peripheral surface of the outer member 12. Therefore, when the inner member 11 and the outer member 12 are displaced relative to each other, the outer side surface 15d It becomes possible to suppress the load applied to the elastic member 14 located between the member 12 and the rigid member 15, thereby ensuring durability.
In addition, since the elastic body 13 includes not only the laminated portion 16 but also the single layer portion 17, it is possible to easily vary the radial spring constant for each position in the circumferential direction.

Further, on the outer peripheral surface of the inner member 11, the protruding portion 11a radially connected to the single layer portion 17 protrudes radially outward from the relief portion 11b radially connected to the laminated portion 16. Among them, it is possible to increase the spring constant in the direction toward the side where the single layer portion 17 of the elastic body 13 is located with respect to the rod axis O, that is, in the longitudinal direction Y of the vehicle. The constant can be high relative to the spring constant in the rod axis O direction. As a result, it is possible to prevent the radial spring constant of the strut mount 10 from being excessively different at each position in the circumferential direction.

The technical scope of the present invention is not limited to the above embodiments, and various modifications can be made without departing from the gist of the present invention.

In the second embodiment, one of the inner side surface 15c of the rigid member 15 and the relief portion 11b of the inner member 11 exhibits a curvilinear shape that protrudes toward the other in the longitudinal cross-sectional view. or the other has a concave curve shape along one side, but this is not limiting. The configuration may be changed as appropriate.
In the second embodiment, in the vertical cross-sectional view, the outer surface 15d of the rigid member 15 has a curved shape that protrudes toward the inner peripheral surface of the outer member 12. However, the present invention is not limited to this, for example, The outer surface 15d of the rigid member 15 may be changed as appropriate, such as a configuration in which the outer surface 15d extends in the rod axis O direction.
In the second embodiment, the elastic body 13 includes the laminated portion 16 and the single layer portion 17, but a configuration without the single layer portion 17 may be adopted.
In the second embodiment, the outer peripheral surface of the inner member 11 has the protruding portion 11a and the relief portion 11b, but an inner member having the same outer diameter over the entire circumference may be employed.
In the second embodiment, the inclination of the tangent to the second line portion L2 is equal to or less than the spring constant of the seal body 24. It may be larger than the spring constant.

According to this invention, since the elastic body includes the laminated portion having the rigid member, the laminated portion of the elastic body is positioned with respect to the rod axis in the radial direction intersecting the rod axis when viewed from the rod axis direction. It is possible to reliably increase the spring constant in the direction toward the rod (hereinafter referred to as the first direction), and the spring constant in the first direction can be made higher than the spring constant in the axial direction of the rod.
In addition, since the laminated portion is configured by alternately laminating the elastic member and the rigid member in the radial direction, the spring constant in the first direction is varied according to the size of the rigid member occupying the laminated portion. This makes it possible to adjust the spring constant easily and accurately.
In addition, since the rigid member has an inner surface extending along the outer peripheral surface of the inner member and an outer surface extending along the inner peripheral surface of the outer member in the transverse cross-sectional view, the rigid member, the inner member and It is possible to reliably increase the spring constant of the laminated portion in the first direction while suppressing the load applied to each elastic member positioned between the outer member and the elastic member.
In addition, since the rigid member is formed in the block shape rather than in the plate shape having a thickness in the radial direction, the rigidity in the radial direction of the rigid member is reliably increased, and the spring constant of the laminated portion in the first direction is increased. can be definitely increased.
In addition, since the rigid member is formed in the block shape rather than in a plate shape having a thickness in the radial direction, the size of the rigid member in the radial direction is ensured, so that the inner member and the outer member are relatively When displacing in the rod axial direction, the rigid member is not rigidly displaced in the rod axial direction, but displaced so as to be inclined with respect to the rod axis, and the elastic member of the laminated portion undergoes shear deformation in the rod axial direction. In addition, it is possible to cause tensile deformation in a direction inclined with respect to the rod axis.

Here, in a vertical cross-sectional view along the axial direction of the rod, either one of the inner surface of the rigid member and the outer peripheral surface of the inner member exhibits a curvilinear shape protruding toward the other, and the other may exhibit a concave curve along one side.

In this case, when viewed in longitudinal section, one of the inner surface of the rigid member and the outer peripheral surface of the inner member exhibits a curvilinear shape that protrudes toward the other, and the other is concave along the other. Since it has a curved shape, it is possible to suppress the load applied to the elastic member positioned between the inner member and the rigid member when the inner member and the outer member are relatively displaced, thereby ensuring durability. can.

Further, in a vertical cross-sectional view along the axial direction of the rod, the outer surface of the rigid member may have a curvilinear shape that protrudes toward the inner peripheral surface of the outer member.

In this case, in the vertical cross-sectional view, the outer surface of the rigid member exhibits a curvilinear shape that protrudes toward the inner peripheral surface of the outer member. It is possible to suppress the load applied to the elastic member located between and to ensure durability.

Further, the elastic body may include a single layer portion which is configured by an elastic member and which is arranged at a position different from that of the laminated portion in the circumferential direction.

In this case, since the elastic body includes not only the laminated portion but also the single layer portion, it is possible to easily vary the radial spring constant for each position in the circumferential direction.

Further, on the outer peripheral surface of the inner member, a portion radially connected to the single layer portion may protrude radially outward from a portion radially connected to the laminated portion.

In this case, on the outer peripheral surface of the inner member, the portion radially connected to the single layer portion protrudes radially outward from the portion radially connected to the laminated portion. It is possible to increase the spring constant in the direction toward the side where the single layer portion of the elastic body is located (hereinafter referred to as the second direction), and the spring constant in the second direction is made higher than the spring constant in the axial direction of the rod. can be made higher. As a result, it is possible to prevent the radial spring constant of the strut mount from being excessively different at each position in the circumferential direction.

In addition, it is possible to appropriately replace the components in the above-described embodiment with well-known components without departing from the scope of the present invention, and the above-described modifications may be combined as appropriate.

By applying the strut mount of the present invention, which includes an inner member, an outer member, and an elastic body, to the relevant field, the spring constant in the radial direction can be easily varied for each position in the circumferential direction, and the can be reliably increased with respect to the spring constant of
Further, by applying the strut mount of the present invention, which includes an inner member, an outer member, and an elastic body, to the relevant field, the spring constant in the radial direction is reliably increased with respect to the spring constant in the axial direction of the rod. It is possible to ensure the amount of elastic deformation of the part in the rod axial direction.

10 strut mount 11 inner member 11a projecting portion (portion connected to the single layer portion in the radial direction)
11b Relief portion (portion connected to the laminated portion in the radial direction)
REFERENCE SIGNS LIST 12 outer member 13 elastic body 14 elastic member 15 rigid member 15a front surface of rigid member 15b rear surface of rigid member 15c inner surface of rigid member 15d outer surface of rigid member 16 laminated portion 17 single layer portion 18 stopper elastic body 21 shock absorber 22 rod O rod axis

Claims (8)

an inner member to which the upper end of the rod of the shock absorber is fixed;
an outer member that encloses the inner member in a circumferential direction along the rod axis and is attached to the vehicle body;
an elastic body disposed between the inner member and the outer member and supporting the inner member and the outer member so as to be relatively elastically displaceable, the strut mount comprising:
The elastic body is
a laminated portion in which elastic members and rigid members are alternately laminated in the radial direction;
A single-layer portion composed of an elastic member and arranged at a position different from the laminated portion in the circumferential direction ,
A strut mount, wherein a portion of the outer peripheral surface of the inner member that is radially connected to the single layer portion protrudes radially outward from a portion that is radially connected to the laminated portion. The rigid member has front and back surfaces facing the rod axis direction, an inner surface extending along the outer peripheral surface of the inner member in a cross-sectional view perpendicular to the rod axis, and an outer surface extending along the inner peripheral surface of the outer member. 2. The strut mount of claim 1 , formed in a block having side surfaces. 3. The strut mount according to claim 1, wherein stopper elastic bodies capable of coming into contact with the vehicle body are provided on front and rear surfaces of a portion of the inner member that is radially connected to the single layer portion. an inner member to which the upper end of the rod of the shock absorber is fixed;
an outer member that encloses the inner member in a circumferential direction along the rod axis and is attached to the vehicle body;
an elastic body disposed between the inner member and the outer member and supporting the inner member and the outer member so as to be relatively elastically displaceable, the strut mount comprising:
The elastic body includes a laminated portion in which elastic members and rigid members are alternately laminated in a radial direction,
The rigid member has front and back surfaces facing the rod axis direction, an inner surface extending along the outer peripheral surface of the inner member in a cross-sectional view perpendicular to the rod axis, and an outer surface extending along the inner peripheral surface of the outer member. A strut mount formed into a block with side surfaces. In a vertical cross-sectional view along the axial direction of the rod, one of the inner surface of the rigid member and the outer peripheral surface of the inner member exhibits a curvilinear shape that protrudes toward the other, and the other 5. The strut mount of claim 4 , wherein the strut mount presents a concave curve along the . 6. A strut mount according to claim 4 or 5 , wherein the outer surface of said rigid member presents a curvilinear shape protruding toward the inner peripheral surface of said outer member when viewed in a vertical cross section along the axial direction of the rod. The strut mount according to any one of claims 4 to 6 , wherein the elastic body comprises an elastic member and includes a single layer portion arranged at a position different from the laminated portion in the circumferential direction. 8. The strut mount according to claim 7 , wherein a portion of the outer peripheral surface of the inner member that is radially connected to the single layer portion protrudes radially outward from a portion that is radially connected to the laminated portion.

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