JP2002227908A - Strut mount - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a strut mount capable of restraining pry at a mounting part by means of a fastening member to vehicle body side of an outside drum metallic ornament due to pry input transmitted from suspension side of a vehicle. SOLUTION: The strut mount 10 is provided with the outside drum metallic ornament 20 which comprises a tubular part and plate-like flange parts 22, 27 extensively arranged in direction approximately perpendicular to axis on an outside face of the tubular part and simultaneously including mounting holes 22a, 27a at a plurality of parts in peripheral direction, an tubular inside drum metallic ornament 11 on which at least one part is disposed concentric to the outside drum metallic ornament and inwardly of the tubular part and a tubular elastic body 31 elastically connecting between the inside drum metallic ornament and the tubular part of the outside drum metallic ornament. A recessed part 24, 29 axially indented toward suspension side to another part is provided in predefined range of periphery on the mounting hole of the flange part of the outside drum metallic ornament and at the same time a tubular protruding part which is axially protruded from the recessed part 24 toward the vehicle body side is provided at a circumferential edge part of the mount hole 22a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a strut mount for a vehicle suspension which is interposed between a vehicle suspension and a vehicle body-side member to reduce an input vibration which tends to propagate from the suspension side to the vehicle body.

[0002]

2. Description of the Related Art Conventionally, this type of strut mount is
For example, as shown in FIG. 12 to FIG. 14, a cylindrical inner tube 1 and an upper plate 3 and a lower plate 4 which are coaxially disposed outside thereof have flat flanges 3 a, 4a, the outer cylinder 2 is overlapped with the outer cylinder 2 and an elastic member 5 such as rubber elastically connects the inner cylinder 1 and the outer cylinder 2 to each other. The strut mount is the inner cylinder fitting 1
Is coaxially fixed to the upper end of a piston rod 103 of a shock absorber 102 of a vehicle suspension by a nut 1a, and an outer cylinder 2 is formed of flanges 3a and 4a.
Are fixed to the vehicle body side member 101 by bolts 6a and nuts 6b through the mounting holes 2a. Also, the inner tube fitting 1
The upper end of the coil spring 104 of the shock absorber 102 is in contact with a spring seat 106 fixed downward to a bearing and expanding downward in a conical shape via a thin-walled cylindrical dust cover 105. According to the strut mount having such a configuration, the input vibration that tends to propagate from the shock absorber 102 side to the vehicle body side through the piston rod 103 and the coil spring 104 is reduced.

[0003]

By the way, in the above-mentioned strut mount, when the vehicle turns, a prying input is transmitted from the suspension, and the prying input is transmitted to a mounting portion using bolts and nuts, and the mounting portion is prying. Therefore, there is a problem that a stable turning function of the vehicle cannot be obtained, and the steering stability of the vehicle is impaired.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem, and suppresses the twisting of an outer cylinder fitting at a mounting portion by a fastening member to a vehicle body side due to a twisting input transmitted from a suspension side of a vehicle. An object of the present invention is to provide a strut mount that can enhance the steering stability of a vehicle.

[0005]

In order to achieve the above object, the constitution of the invention according to the first aspect is characterized in that a cylindrical portion and an outer surface of the cylindrical portion are substantially perpendicular to the axis. An outer cylindrical member which is extended and has a plate-like flange portion having mounting holes at a plurality of positions in a circumferential direction, and coaxially disposed with respect to the outer cylindrical member and at least a part thereof is disposed inside the cylindrical portion. And a cylindrical elastic body for elastically connecting the cylindrical portion of the outer cylinder and the inner cylinder to the upper end of the piston rod of the vehicle suspension. A strut mount for a vehicle suspension in which the flange portion is coaxially fixed to the body portion and the flange portion is fixed to the vehicle body-side member in a state of being in close contact with the vehicle body side member via the mounting hole. Within a certain range, toward the suspension side with respect to other parts Along with providing a recess that is recessed in the axial direction,
There is provided a cylindrical projection protruding in the axial direction from the concave portion toward the vehicle body at a peripheral portion of the mounting hole.

According to the first aspect of the present invention, in the mounting portion of the flange portion of the outer cylinder fitting to the vehicle body by the tightening member, the flange portion receives a torsion input transmitted from the suspension side. The rigidity in the torsion direction of the tightening member is increased by interposing the cylindrical protrusion protruding from the concave portion of the flange between the vehicle body side member and, as a result, the rigidity to the torsion input at the mounting portion is increased. . Therefore, at the time of turning of the vehicle or the like, the twisting input transmitted from the suspension side is suppressed by the cylindrical projection.

According to a second aspect of the present invention, in the strut mount according to the first aspect, the recess extends to an outer peripheral edge of a predetermined range around the mounting hole of the flange portion. It is in. As described above, since the recess around the mounting hole is extended to a predetermined range around the mounting hole around the flange, the flange does not need to be folded back from the recess at the outer peripheral side. Can be reduced. Further, the processing for forming the concave portion can be facilitated.

According to a third aspect of the present invention, there is provided a strut mount according to the first or second aspect, wherein the outer cylinder is provided on a vehicle body having an outer flange portion. A first metal fitting and a second metal fitting disposed on the suspension side, wherein the first metal fitting and the second metal fitting are overlapped at each outer flange portion,
A concave portion is provided in a predetermined range around a mounting hole of each outer flange portion, and a cylindrical projection is provided at a peripheral portion of the mounting hole of the outer flange of the first metal fitting. As described above, the outer cylindrical metal fitting is constituted by the first metal fitting and the second metal fitting each having the outer flange part, and the outer flange part is overlapped, so that the entire flange part is thickened. The rigidity against the twisting input is further increased.

Further, the structural feature of the invention according to claim 4 is that, in the strut mount according to claim 1 or 2, the outer cylinder is formed by processing a single thin metal plate. Is to be formed.
As described above, by forming the outer tube fitting by processing one sheet metal sheet, it is possible to reduce the number of parts and the weight of the fitting.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a strut mount 10 for a vehicle suspension according to a first embodiment, which is provided with a piston rod 103 of a shock absorber 102. FIG. 2 is a cross-sectional view showing a state in which the strut mount 10 is interposed between the vehicle body-side member 101 and FIGS. 2 and 3 are a plan view and a cross-sectional view of the strut mount 10. This strut mount 10 is a shock absorber 10
This is a mount called an integrated input type in which vibration input from 2 is received only by the inner cylinder fitting 11 side.

The strut mount 10 includes a cylindrical inner cylinder fitting 11 made of a metal plate, an outer cylinder fitting 20 disposed coaxially outside the inner cylinder fitting 11, an inner cylinder fitting 11 and an outer cylinder fitting 2.
And a rubber elastic body portion 31 that elastically connects between the elastic member and the rubber member. Hereinafter, the vehicle body side on which the strut mount 10 is mounted will be described as an upper side, and the suspension side will be described as a lower side.

As shown in FIG. 3, the inner tube fitting 11 has a cylindrical tube portion 12, and the lower half of the tube portion 12 is a large-diameter portion 13 having a slightly enlarged diameter. A cylindrical bearing 14 is coaxially inserted into the large diameter portion 13, and is held in the large diameter portion 13 by slightly bending the lower end of the large diameter portion 13 toward the axial center. . In addition, large diameter part 1
A conical cylindrical outer member 15 is coaxially arranged outside the outer member 3. The outer member 15 has a small-diameter portion 16 having a slightly reduced diameter at the upper end, and a large-diameter portion 17 having a slightly increased diameter at the lower end. The outer member 15 is arranged such that the small-diameter portion 16 engages with the large-diameter portion 13 of the cylindrical portion 12 at the step 13a, and the large-diameter portion 17 extends slightly below the lower end of the large-diameter portion 13 in the axial direction. Have been. The outer member 15 has a small diameter portion 16.
Is fixed to the tubular portion 12 by welding at the position of the step 13a. As shown in FIG. 1, a spring seat 106 for receiving the coil spring 104 of the shock absorber 102 is attached to the exposed surface of the large diameter portion 13 at the lower end opening of the bearing 14.
The spring seat 106 has a conical cylindrical shape like the outer member 15, and has a flat receiving portion on the outer peripheral side that receives the coil spring 104 via the dust cover 105.

The outer tube fitting 20 includes an upper plate fitting 21 made of a metal plate.
And the lower metal plate 26 are overlapped. Each of the upper metal plate 21 and the lower metal plate 26 has an irregular shape in plan view, having the same substantially equilateral triangle and each apex notched in an arc shape, and having a circular shape formed with a predetermined radius from the center. The outside has flat flange portions 22 and 27. The diameter of this circle is slightly larger than the outer diameter of the enlarged diameter portion 17 of the outer member 15. The upper metal fitting 21 is provided with an annular inclined wall 23 which is slightly inclined upward at a predetermined angle with respect to the axis at the inner peripheral edge of the flange 22.
The flange portion 22 is provided with a mounting hole 22a at a center position of a predetermined region corresponding to each of the substantially regular triangular tops. A circular recess 24 slightly recessed downward is provided coaxially around the mounting hole 22a. Further, at the periphery of the mounting hole 22a of the recess 24, the recess 2 is provided.
A cylindrical protruding portion 25 that protrudes vertically from 4 to the plane of the flange portion 22 is provided.

The lower metal fitting 26 is provided with an annular wall 28 extending a predetermined length axially downward at the inner peripheral edge of the flange 27. The flange portion 27 is provided with a mounting hole 27a at a position corresponding to the flange portion 22. Mounting hole 27a
, A flat recess 29 slightly recessed downward like the recess 24 is provided coaxially. Upper plate fitting 21
The lower metal fitting 26 is formed by pressing a flat plate formed in an irregular shape. The upper metal plate 21 and the lower metal plate 26 are overlapped by the flange portions 22 and 27, and fixed by welding or the like to be integrated.

As shown in FIG. 3, the rubber elastic body 31 is
A range between the upper end of the cylindrical portion 12 of the inner cylindrical fitting 11 and the vicinity of the lower end of the outer member 15, and the lower metal fitting 26 from the upper end of the upper metal fitting 21.
Is disposed over the entire circumference in the circumferential direction between the lower ends of the metal members and elastically connects the metal fittings 11 and 20 to each other. The rubber elastic body portion 31 is integrally formed as the strut mount 10 by setting the inner cylinder fitting 11 and the outer cylinder fitting 20 in a molding die and performing rubber vulcanization molding.

As shown in FIGS. 1 and 3, the strut mount 10 is first inserted into the opening 101a of the vehicle body-side member 101 from below, and the strut mount 10 is mounted on the vehicle. Bolts 27b and nuts 27c at the positions of the mounting holes 22a, 27a of the portions 22, 27.
With this, it is fixed to the vehicle body side member 101. Next, the tip of the piston rod 103 of the shock absorber 102 attached to the wheel 107 is inserted into the bearing 14 in the inner cylinder fitting 11 and positioned, and the piston rod 10
By screwing a nut 14 a to the protruding end of the inner cylinder 3, the inner cylinder fitting 11 is fixed to the piston rod 103. The upper end of the coil spring 104 is the dust cover 1
05 is in pressure contact with the spring seat 106 via the upper end.

In the first embodiment configured as described above, the mounting holes 22 as mounting portions for the bolts 27b and the nuts 27c of the flange portions 22, 27 of the outer cylinder 20 are provided.
a, 27a, the flange portion 22 and the vehicle body side member 10
Since the cylindrical projection 25 protruding from the concave portion 24 of the flange portion 22 is interposed between the mounting portion 1 and the housing 1, the rigidity of the mounting portion against the prying input is increased. Therefore, the twisting input transmitted from the suspension side is suppressed by the cylindrical projection 25.

As a result, according to the present embodiment, the prying input transmitted from the shock absorber 102 of the suspension during the turning of the vehicle or the like is transmitted to the flange portion 22.
, The response delay to steering is improved, and the steering stability of the vehicle is enhanced. Further, by forming the outer tube fitting 20 by overlapping the flange portions 22 and 27 of the upper plate fitting 21 and the lower plate fitting 26, the rigidity of the entire flange portion against the twisting input is further increased, and the steering stability of the vehicle is improved. Is further enhanced. It should be noted that the flange portion 2 is not the entire outer tube fitting 20.
The thickness of the flange is increased by superimposing 2, 27, and the rigidity of the entire flange portion can be increased while suppressing an increase in the weight of the entire bracket.

Next, a modified example of the first embodiment will be described. In the modified example, the shape around the mounting hole of the outer cylinder fitting 20A in the first embodiment is changed. That is, as shown in FIGS. 4 and 5, the recesses 24A and 29A provided around the mounting holes 22a and 27a of the flange portions 22A and 27A of the upper and lower metal fittings 21A and 26A.
Are fan-shaped extending symmetrically with respect to the mounting holes 22a and 27a and extending to the outer peripheral edges of the flange portions 22A and 27A in a spread range of about 120 °. Since the outer peripheral edge side of the concave portions 24A and 29A does not need to be turned back by configuring the modification in this way, the shape of the flange portions 22A and 27A can be reduced in addition to the effect of the first embodiment. Thus, the strut mount can be reduced in size and weight, and processing for forming the concave portion can be facilitated. Therefore, the manufacturing cost of the strut mount can be reduced.

Next, a second embodiment will be described with reference to FIG.
A description will be given based on FIG. In the present embodiment, the strut mount 40 has substantially the same form as the strut mount 10, and has a coaxial shape between a cylindrical inner cylindrical metal member 41 made of a metal plate and both outer axial ends of the inner cylindrical metal member 41. And an elastic member 33 for elastically connecting the inner cylindrical member 41 and the outer cylindrical member 50 to each other.

As shown in FIG. 7, the inner tube fitting 41 has a cylindrical tube portion 42, and the lower half of the tube portion 42 is a slightly enlarged large diameter portion 43. A bearing 44 is coaxially inserted into the large-diameter portion 43, and is held in the large-diameter portion 43 by bending the lower end of the large-diameter portion 43 toward the axis. A substantially conical outer member 45 that is concave in the axial direction is coaxially disposed radially outside the large diameter portion 43, and the upper end of the outer member 45 has a slightly reduced small diameter portion 46. It has become. The outer member 45 is arranged such that the small-diameter portion 46 engages with the large-diameter portion 43 of the cylindrical portion 42 at the step 43a, and the lower end of the outer member 45 extends slightly below the lower end of the large-diameter portion 43 in the axial direction. I have. The outer member 45 is fixed to the cylindrical portion 42 by welding or the like at the position of the step portion 43a at the small diameter portion 46. Also, the outer peripheral portion on the upper end side of the cylindrical portion 42 is a thin portion removed in the axial direction, and a disc-shaped rebound stopper 48 is coaxially mounted on the thin portion so that the upper end of the thin portion is folded. Is fixed to the cylindrical portion 42 by the

The outer tube fitting 50 is formed by drawing, pressing, or the like of a single metal plate, and is folded outwardly over the entire circumference at the upper end of the tube portion 51 having a conical surface shape. The folded portion 52 extends substantially to the center of the tubular portion 51 in the axial direction and is overlapped with the tubular portion 51, and a flat flange portion 53 extending radially from the lower end of the folded portion 52 over the entire circumference. I have. The outer diameter of the lower end of the tubular portion 51 is slightly smaller than the outer diameter of the outer member 45. That is, the lower end portion of the outer member 45 is
It functions as a zero stopper.

The outer shape of the flange portion 53 is
Like the first and lower metal fittings 26, each of the vertices of the substantially equilateral triangle in plan view has an irregular shape in which the tops are cut out in an arc shape. An attachment hole 53a is provided in the flange portion 53 at a substantially central position of a predetermined region corresponding to the top of the substantially equilateral triangle. A flat circular recess 54 slightly recessed downward is provided coaxially around the mounting hole 53a. Further, a cylindrical projection 55 is provided at a peripheral edge position of the mounting hole 53 a of the concave portion 54, which vertically protrudes from the concave portion 54 to the plane of the flange portion 53.

As shown in FIG. 7, the rubber elastic portion 33 is
The entire circumference in the circumferential direction between a range between the lower side of the rebound stopper mounting position of the cylindrical portion 42 of the inner cylindrical fitting 41 and the vicinity of the lower end of the outer member 45 and a range between the upper and lower ends of the outer cylindrical fitting 50. The two metal fittings 41 and 50 are elastically connected to each other. The rubber elastic body portion 33 is integrally formed as a vulcanized molded product by setting the inner cylindrical member 41 and the outer cylindrical member 50 in a molding die and performing rubber vulcanization molding.
A rebound stopper 4 is attached to the inner cylindrical fitting 41 of this vulcanized molded product.
By fixing 8, a strut mount 40 is obtained. The mounting of the strut mount 40 to the vehicle is the same as in the first embodiment.

In the second embodiment configured as described above, similarly to the first embodiment, when the vehicle turns, the twist input transmitted from the suspension side is provided in the concave portion 54 of the flange portion 53. As a result, the response delay to steering is improved, and the steering stability of the vehicle is enhanced. In addition, by forming the outer cylinder by processing one thin metal plate, the rigidity of the flange part is slightly reduced compared to the case of two, but the number of parts can be reduced and strut mounts can be provided at low cost. it can. Further, the effect of reducing the weight of the strut mount can be obtained.

Next, a modification of the second embodiment will be described. In the modified example, the shape around the mounting hole of the outer cylinder fitting 50A is changed. That is, as shown in FIGS. 8 and 9, the concave portion 54A provided around the mounting hole 53a of the flange portion 53A extends symmetrically with respect to the mounting hole 53a to the outer peripheral edge of the flange portion 53A in a range of approximately 120 °. It has a fan shape. Mounting hole 53a
Is provided with a cylindrical projection 55A protruding from the recess 54A. Since the outer peripheral side of the concave portion 54A of the flange portion 53A does not need to be folded back by configuring the modification in this manner, the shape of the flange portion 53A can be reduced in addition to the effect of the second embodiment. Can,
The strut mount can be reduced in size and weight, and the processing for forming the concave portion can be facilitated. As a result, the manufacturing cost of the strut mount can be reduced.

Next, a third embodiment will be described with reference to FIG.
0 and FIG. Strut mount 6
0 is a cylindrical inner cylinder 61 made of a metal plate, an outer cylinder 70 disposed coaxially outside the inner cylinder 61, and an inner cylinder 61 and an outer cylinder, similarly to the above embodiments. A rubber elastic body portion 35 for elastically connecting with the cylindrical metal fitting 70;
The strut mount 60 is used for the shock absorber 1
A mount referred to as a separate input type in which an input from 02 is received by both the inner cylinder fitting 61 and the outer cylinder fitting 70.

As shown in FIG. 11, the inner tube fitting 61 has a cylindrical tube portion 62, and has an annular flange portion 63 extending radially outward at the upper end of the tube portion 62. are doing.
The upper end of the piston rod 103 of the shock absorber 102 is inserted into the shaft hole 64 of the cylindrical portion 62.

The outer cylinder 70 is an upper metal plate 71 made of a metal plate.
And the lower metal plate 81 are overlapped. Each of the upper metal plate 71 and the lower metal plate 81 has the same substantially equilateral triangular shape in plan view and has an irregular shape in which each apex is cut off in an arc shape, and is a substantially circular shape formed with a predetermined radius from the center. Outside portions are flat flange portions 72 and 82. The upper metal plate 71 has an annular vertical wall 73 extending vertically upward with respect to the axis at the inner peripheral edge of the flange 72, and an annular annular wall extending in the axial direction from the upper end of the vertical wall 73. The horizontal wall 74 is provided integrally. A center hole 74a is provided at the center of the horizontal wall 74.

The flange 72 is provided with a mounting hole 72a in the vicinity of the outer peripheral edge corresponding to the top of the substantially equilateral triangle. A flat recess 75 slightly recessed axially downward is provided around the mounting hole 72a. The concave portion 75 has a fan shape extending to the outer peripheral edge of the flange portion 72 in a range of approximately 120 ° symmetrically with respect to the mounting hole 72a. Further, a cylindrical projection 76 vertically protruding from the recess 75 to the plane of the flange portion 72 is provided at a peripheral position of the mounting hole 72a of the recess 75. The upper metal plate 71 is formed by pressing a flat plate formed in an irregular shape.

The lower metal plate 81 is provided with an annular lower wall 83 which is slightly inclined downward with respect to the axis at the inner peripheral edge of the flange 82 and extends horizontally in the axial direction. At the center of the lower wall portion 83, a center hole 83a having an inner diameter slightly larger than the outer diameter of the tube portion 62 of the inner tube fitting 61 is formed. The flange 82 is provided with a mounting hole 82 a at a position corresponding to the flange 72. A flat recess 84 slightly recessed downward like the recess 75 is provided around the mounting hole 82a. The lower metal plate 81 is formed by pressing a flat plate formed in an irregular shape. The upper metal plate 71 and the lower metal plate 81 are connected to the flange 7
They are superimposed at 2 and 82 and fixed and integrated by welding or the like.

At the bottom of the lower metal plate 81, a cylindrical container-shaped receiving member 86 is coaxially arranged. The receiving member 86 includes a circular flat portion 87 and a vertical portion 88 on the periphery thereof.
At the center of the plane portion 87, a center hole 87a identical to the center hole 83a of the lower wall portion 83 is provided. The receiving member 86 includes the flat portion 8.
7, the lower end is fixed to the lower wall portion 83 by welding, and the lower end thereof is arranged to extend slightly below the lower end of the cylindrical portion 62 of the inner cylindrical fitting 61 in the axial direction. An annular thrust bearing (not shown) is attached to the receiving member 86. A conical cylindrical spring seat (not shown) is fixed to the inner peripheral side of the thrust bearing, and as shown in FIG.
The coil spring 104 of the shock absorber 102 is received.

The rubber elastic portion 35 is provided between the upper and lower surfaces and the entire outer peripheral surface of the flange portion 63 of the inner cylindrical member 61 and the inner peripheral surfaces of the upper plate 71 and the lower plate 81 of the outer cylindrical member 70. The inner and outer cylindrical fittings 61, 70
The space is elastically connected. The rubber elastic body portion 35 is integrally molded as a vulcanized molded product by setting the inner cylinder fitting 61 in a molding die and performing rubber vulcanization molding. The rubber elastic body portion 35 of the vulcanized molded product is connected to the upper plate metal member 7 of the outer cylinder metal member 70.
1 and the lower metal plate 81 to fix them.
Are formed as strut mounts 60 by welding and fixing at the flange portions 72 and 82.

As described with reference to FIG. 1 in the first embodiment, the strut mount 60 is first inserted into the opening of the vehicle body-side member 101 from below, and the strut mount 60 is attached to the vehicle. It is fixed to the vehicle body-side member 101 by bolts 27b and nuts at the mounting holes 72a and 82a of the flange portions 72 and 82 of the tubular metal fitting 70. Next, the tip of the piston rod 103 of the shock absorber 102 attached to the wheel is inserted and positioned in the cylindrical portion 62 of the inner cylinder fitting 61, and a nut (not shown) is screwed to the protruding end of the piston rod 103. Thereby, the inner cylinder fitting 61 is fixed to the piston rod 103. In this embodiment, the shock absorber 1
The upper end of the coil spring 104 is pressed against a spring seat (not shown), so that the input vibration propagated from the coil spring can be received by the outer sleeve 70.

In the third embodiment configured as described above, similarly to the first embodiment, the twist input transmitted from the suspension side is provided in the concave portion 75 of the flange portion 72 when the vehicle is turning or the like. As a result, the response delay to steering is improved, and the steering stability of the vehicle is enhanced.

In the third embodiment, the recesses 75, 84 provided in the flanges 72, 82 of the upper metal fitting 71 and the lower metal fitting 81 extend from the periphery of the mounting holes 72a, 82a to the peripheral edge. However, instead of this, as shown in the first embodiment, a circular concave portion only around the mounting hole can be used.

In each of the above embodiments, the rubber elastic portion may be formed of an elastic elastomer or the like instead of the rubber elastic member. In addition, the strut mount described in the above embodiment is an example, and can be implemented in various forms without departing from the gist of the present invention.

[0038]

According to the first aspect of the present invention, when the vehicle is turning, the twisting input transmitted from the suspension is suppressed by the cylindrical projection, so that the response delay to steering is improved, and steering stability is improved. Sex is enhanced. Further, by extending the concave portion to the outer peripheral edge of a predetermined range around the mounting hole of the flange portion, the shape of the flange portion can be reduced, so that the strut mount can be reduced in size and weight, and processing for forming the concave portion is easy. become. Therefore, the manufacturing cost of the strut mount can be reduced (the effect of the invention of claim 2).

Further, since the outer cylinder is formed by laminating the first metal fitting and the second metal fitting each having an outer flange portion, the rigidity against the twisting input is further enhanced, and the steering stability of the vehicle is further enhanced. (Effect of the invention of claim 3). In addition, by forming the outer cylindrical metal part by processing one metal sheet, the rigidity of the flange part is slightly reduced as compared with the case of two metal sheets, but the number of parts can be reduced and the weight of the metal part can be reduced. Is obtained (the effect of the invention of claim 4).

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a state in which a strut mount according to a first embodiment of the present invention is interposed between a suspension and a vehicle body-side member.

FIG. 2 is a plan view showing the strut mount.

FIG. 3 is a view showing the strut mount, taken along the line III-I of FIG. 2;
It is sectional drawing of the II line direction.

FIG. 4 is a plan view showing a strut mount according to a modification of the first embodiment.

FIG. 5 is a cross-sectional view of the strut mount taken along line VV of FIG. 4;

FIG. 6 is a plan view showing a strut mount according to a second embodiment.

FIG. 7 shows the strut mount of FIG.
It is sectional drawing of the II line direction.

FIG. 8 is a plan view showing a strut mount according to a modification of the second embodiment.

FIG. 9 shows IX-IX of FIG. 8 showing the strut mount.
It is sectional drawing of a line direction.

FIG. 10 is a plan view showing a strut mount according to a third embodiment.

FIG. 11 shows the strut mount of FIG.
It is sectional drawing of the XI line direction.

FIG. 12 is a longitudinal sectional view showing a state in which a strut mount as a conventional example is interposed between a suspension and a vehicle body-side member.

FIG. 13 is a plan view showing the strut mount.

FIG. 14 is a ZZ of FIG. 13 showing the strut mount;
It is sectional drawing of a line direction.

[Explanation of symbols]

10 ... strut mount, 11 ... inner cylinder fitting, 20, 2
0A: outer tube fitting, 21: upper plate fitting, 22, 22A: flange portion, 22a: mounting hole, 24, 24A: concave portion, 25,
25A: cylindrical projection, 26: lower metal fitting, 27, 27A: flange, 27a: mounting hole, 27b: bolt, 27c ...
Nuts, 29, 29A recess, 31, 33, 35 rubber elastic body, 40 strut mount, 41 inner cylinder fitting, 50, 50A outer cylinder fitting, 51 tubular part, 53, 53
A: flange portion, 53a: mounting hole, 54, 54A: concave portion, 55, 55A: cylindrical projection, 60: strut mount, 61: inner cylinder, 70: outer cylinder, 71: upper plate, 72 ... Flange part, 72a mounting hole, 75 concave part,
76: cylindrical projection, 81: lower metal fitting, 82: flange,
82a: mounting hole, 84: recess, 101: body side member, 1
02: shock absorber, 103: piston rod,
104: coil spring; 106: spring seat.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3J059 AA03 AC05 AD05 BA42 BC06 BD05 CA14 CB03 CC10 EA02 EA03 EA13 GA03 3J069 AA50 CC34 DD47

Claims (4)

[Claims] 1. An outer cylindrical fitting comprising a cylindrical portion and a plate-like flange portion extending substantially perpendicularly to the axis on the outer surface of the cylindrical portion and having mounting holes at a plurality of positions in a circumferential direction. And a cylindrical inner cylinder fitting coaxially with the outer cylinder fitting and at least a part of which is disposed inside the cylindrical portion, and a tubular portion of the outer cylinder fitting and the inner cylinder fitting. The inner cylinder fitting is coaxially fixed to the upper end of a piston rod of a vehicle suspension, and the flange portion is fastened by a fastening member via the mounting hole. A strut mount for a vehicle suspension fixed to a vehicle body-side member in an intimate contact state, wherein the strut mount is axially recessed toward the suspension side with respect to other portions in a predetermined range around a mounting hole of a flange portion of the outer cylinder fitting. A concave portion is provided, and the vehicle Strut mount, characterized in that a tubular projection protruding axially from the recess towards. 2. The strut mount according to claim 1, wherein the recess extends to an outer peripheral edge of a predetermined range around a mounting hole of the flange portion. 3. The first and second fittings, wherein the outer tubular fitting comprises a first fitting disposed on the vehicle body side having an outer flange portion and a second fitting disposed on the suspension side. Are overlapped at each outer flange portion, the concave portion is provided in a predetermined range around a mounting hole of each outer flange portion, and the cylindrical protrusion is provided at a peripheral portion of the mounting hole of the outer flange of the first metal fitting. The strut mount according to claim 1 or 2, wherein the strut mount is provided. 4. The strut mount according to claim 1, wherein the outer metal fitting is formed by processing a single thin metal plate.