JP2002310209A - Strut mount - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a strut mount of a vehicle suspension capable of preventing a stopper board member from rotating and falling out of an inner cylinder clamp, and capable of preventing generation of abnormal noise. SOLUTION: The inner cylinder clamp 11 of the strut mount 10 is a thin attaching part 15 from which a prescribed thickness is removed in the direction of the shaft center all around the outer surface from the opening end of a small diameter part 12 in a prescribed range in the axial direction, and the boundary is a step part 15a. The stopper board member 20 is a flat clamp, having a center hole 22a, whose inner diameter is nearly the same as the outer diameter of the attaching part, on the bottom part 22, and a groove part 24 is formed all around the center hole on the inner side of the bottom part in the circumferential direction by the press working. The attaching part is bent outward in the radial direction, with the stopper board member inserted into the attaching part through the center hole and abutting to the step part, and is superposed on the periphery of the center hole. The superposed part 15b is pressed against the stopper board member and caulked. Accordingly, the stopper board member is firmly fixed to the inner cylinder clamp.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle which is interposed between a piston rod of a suspension of a vehicle and a vehicle body-side member or the like to reduce input vibration which propagates from the suspension side to the vehicle body through the piston rod. Related to strut mounts for suspension.

[0002]

2. Description of the Related Art Conventionally, a strut mount 10 of this type has been used.
A is, for example, as shown in FIG. 1, a bottomed cylindrical inner cylinder fitting 11, a stopper plate member 20 </ b> A which is a flat metal fitting fixed to an upper opening end of the inner cylinder fitting 11, and an inner cylinder fitting 11. An outer cylindrical metal fitting 25 arranged coaxially outside the inner cylindrical metal fitting 11
The inner cylinder fitting 11 is coaxial with the upper end of the piston rod 3 of the shock absorber 2 at the lower opening end side. And the outer tube fitting 25 is fixed to the vehicle body-side member 1 at the flange portion 28.

As shown in FIGS. 2 and 4, a predetermined thickness of the inner cylindrical member 11 is deleted in the axial direction over the entire outer peripheral surface from the opening end side of the small diameter portion 12 to a predetermined position in the axial direction. The thin mounting portion 15 is formed, and the boundary between the outer peripheral surface of the mounting portion 15 and the outer peripheral surface of the other portion of the small-diameter portion 12 is a step portion 15a.
It has become. A stopper plate member 20A having a center hole 22a having substantially the same inner diameter as the outer diameter of the mounting portion 15 is inserted into the mounting portion 15 at the center hole 22a with respect to the inner cylindrical metal fitting 11, and is brought into contact with the step portion 15a. By bending the mounting portion 15 radially outward and superimposing it around the central hole 22a of the stopper plate member 20A, and pressing and caulking the superimposed portion,
The stopper plate member 20A is fixed to the inner cylinder fitting 11. According to the strut mount 10A having such a configuration,
Vibration input that tends to propagate from the shock absorber 2 side to the vehicle body side through the piston rod 3 can be reduced by the vibration absorbing action of the elastic body portion 31.

[0004]

In the strut mount 10A, if the tightening of the bent inner cylinder fitting 11 to the stopper plate member 20A by the mounting portion 15 is weak, a rebound input from the piston rod 3 is generated. When the force is input to the stopper plate member 20A via the elastic member disposed at the upper end of the outer tube fitting 25, the fastening of the mounting portion 15 is easily loosened. For this reason, there is a possibility that the stopper plate member 20 </ b> A may rotate, or the stopper plate member 20 </ b> A may fall off from the inner cylinder fitting 11. Furthermore, when the stopper plate member 20A rotates, the stopper plate member 20A and the inner tube fitting 11 rub against each other on the contact surface, thereby generating an unusual noise, which may cause discomfort to the occupant of the vehicle.

An object of the present invention is to provide a strut mount for a vehicle suspension which can prevent the rotation of the stopper plate member and the falling off from the inner cylinder and can suppress the generation of abnormal noise. The purpose is to provide.

[0006]

In order to achieve the above object, a structural feature of the present invention according to the first aspect is that a cylindrical metal fitting is provided at a predetermined position in an axial direction from an upper opening end thereof. An inner cylindrical metal fitting in which the entire outer peripheral surface of the reaching range is a mounting portion recessed coaxially in the axial direction, and a boundary between the outer peripheral surface of the mounting portion and the outer peripheral surface of the other portion is a step portion, A flat metal fitting having a center hole with an inner diameter substantially the same as the outer diameter of the mounting portion of the inner cylindrical metal fitting, which is inserted into the outer peripheral surface side of the mounting portion at the center hole and abuts on the step portion. The stopper portion is fixed to the inner cylinder by being bent outward in the radial direction and overlapped around the center hole, and is pressed by the overlapped portion. The stopper plate is coaxially arranged and the end facing the stopper plate member against excessive vibration input. A cylindrical outer cylinder fitting whose axial movement is restricted by abutting on a cylindrical elastic body portion that elastically connects between the inner cylinder fitting and the outer cylinder fitting. A strut mount for a vehicle suspension in which an inner cylinder is fixed coaxially to an upper end of a piston rod of a shock absorber at a lower opening end side and an outer cylinder is fixed to a vehicle body side member; At least one contact surface of the stopper plate member contacting the overlapping portion and the step portion and / or the surface of at least one of the overlapping portion and the step portion contacting the stopper plate member in the mounting portion of the member are made uneven. It is in.

According to the first aspect of the present invention, at least one contact surface of the stopper plate member contacting the overlapping portion and the step portion of the mounting portion of the inner cylindrical member and the stopper plate member. At least one surface of at least one of the overlapping portion and the step portion of the attachment portion is made uneven. Therefore, in a state where the stopper plate member is inserted into the outer peripheral side of the mounting portion at the center hole and abuts on the step portion,
By bending the mounting portion radially outward and superimposing it around the center hole of the stopper plate member and pressing and caulking the overlapping portion of the superimposed mounting portion, the stopper plate member and the mounting portion The unevenness provided on at least any one of the contact surfaces causes the two to bite each other, and a close contact is formed between the two. For this reason, the stopper plate member is firmly fixed to the inner cylindrical fitting, and even if a rebound input is received from the suspension side, it is possible to prevent the attachment portion from loosening at the portion where the mounting portion is fastened to the stopper plate member.

In addition, when the pressing force applied to the stopper plate member varies due to the mounting portion of the inner cylindrical fitting, at least one of the contact surface of the stopper plate member, the overlapping portion of the mounting portion, and the step portion becomes uneven. If it is not, loosening tends to occur between the mounting part of the inner cylinder fitting and the stopper plate member, but even if the pressing force varies somewhat due to the unevenness, the stopper plate member overlaps the At least one of the contact surfaces with the part is in a state of biting each other. For this reason, it is possible to suppress the occurrence of slack between the mounting portion of the inner cylinder and the stopper plate member, and to stably maintain the stopper plate member fixed by the inner cylinder.

According to a second aspect of the present invention, in the strut mount according to the first aspect, the mounting portion of the inner cylindrical member extends from the upper open end to a predetermined position in the axial direction. The outer peripheral surface of the range is formed to be thin by removing a predetermined thickness in the axial direction over the entire outer peripheral surface, and the boundary between the outer peripheral surface of the mounting portion and the outer peripheral surface of the other portion is a step portion. .

According to the second aspect of the present invention, in a state where the stopper plate member is inserted into the mounting portion of the inner cylinder and is in contact with the step portion, the mounting portion is bent radially outward to form the stopper plate member. When overlapped around the center hole and pressed and caulked, the overlapped portion and the stepped portion of the stopper plate member and the mounting portion are caused by unevenness provided on at least one of the respective contact surfaces. Become biting each other,
An intimate contact between the two is formed. Further, since the mounting portion is made thin, the bending process becomes easy, and the weight of the inner tube fitting can be reduced.

According to a third aspect of the present invention, there is provided the strut mount according to the first aspect, wherein the inner cylindrical member is located at a predetermined axial distance from an upper open end thereof. It is formed in a step portion which is bent inward in the direction perpendicular to the axis and extends slightly inward in the radial direction over the entire periphery of the outer peripheral surface, and is further parallel to the axial direction at the radial inner end position of the step portion. That is, it is folded back and formed on the mounting portion.

According to the third aspect of the present invention, in a state where the stopper plate member is inserted into the mounting portion of the inner cylinder and is in contact with the stepped portion, the mounting portion is bent radially outward to form the stopper plate member. When overlapped around the center hole and pressed and caulked, the overlapped portion and the stepped portion of the stopper plate member and the mounting portion are caused by unevenness provided on at least one of the respective contact surfaces. Become biting each other,
An intimate contact between the two is formed. In addition, the step portion, the mounting portion, and the overlapping portion are formed by bending the inner cylindrical fitting, so that the plate thickness is reduced, and the fastening force by the overlapping portion is relatively reduced. The unevenness is provided on any one of the contact surfaces of the member and the mounting portion between the overlapping portion and the step portion, so that the reduction in the plate thickness can be covered, and the close contact between the two can be ensured.

According to a fourth aspect of the present invention, in the strut mount according to the first aspect, the inner cylindrical member is overlapped on the outer peripheral surface of the inner cylindrical portion and the inner cylindrical portion. It is configured integrally with the outer cylinder,
The upper end of the outer cylindrical portion is disposed at a predetermined distance in the axial direction from the upper open end of the inner cylindrical portion, and the upper end of the outer cylindrical portion is stepped with respect to the inner cylindrical portion. The part reaching the upper end opening end is the mounting part.

According to the fourth aspect of the present invention, in a state where the stopper plate member is inserted into the mounting portion of the inner cylindrical fitting and is in contact with the step of the outer cylindrical portion, the mounting portion on the distal end side of the inner cylindrical portion is removed. When bent outward in the radial direction and overlapped around the center hole of the stopper plate member, and when the overlapped portion is pressed and swaged, the overlapped portion and the step portion of the stopper plate member and the mounting portion are The irregularities provided on at least any one of the contact surfaces are in a state of biting each other, and a close contact between them is formed. Further, since the upper end of the outer cylindrical portion is stepped with respect to the inner cylindrical portion, a slight displacement occurs in the axial direction when the outer cylindrical fitting comes into contact with the stopper plate member, and the stopper plate member Loosening can occur. However, the unevenness is provided on one of the contact surfaces between the stopper plate member and the overlapping portion and the step portion of the mounting portion, and the close contact between the two is ensured, thereby preventing the stopper plate member from loosening. Can be.

According to a fifth aspect of the present invention, in the strut mount according to any one of the first to fourth aspects, the overlapping portion of the mounting portion of the inner cylindrical member abuts. The concave and convex shape provided on the contact surface of the stopper plate member is a linear groove.

According to the fifth aspect of the present invention, a linear groove is provided on the contact surface of the stopper plate member with which the overlapping portion of the mounting portion of the inner cylindrical member comes into contact, so that the overlapping portion of the mounting portion can be formed by the stopper plate. When pressed around the center hole of the member and swaged, the overlapped portion sufficiently digs into the groove provided in the stopper plate member, so that more tight contact between the overlapped portion and the stopper plate member is formed. Further, the length of the overlapped portion in the radial direction can be made longer than that of the stepped portion, and the groove can be formed in the stopper plate member accordingly. Therefore, the area of the contact surfaces of each other can be increased. . Therefore, the overlapping portion and the stopper plate member can be brought into more close contact. In addition, forming a groove in the stopper plate member can be easily performed as compared with forming an uneven portion in the overlapping portion or the step portion of the mounting portion.

According to a sixth aspect of the present invention, in the strut mount according to any one of the first to fifth aspects, the material of the stopper plate member is smaller than that of the inner cylinder. Is harder than the material. As described above, since the material of the stopper plate member is harder than the material of the inner cylindrical member, the mounting portion is bent radially outward, and is pressed by the overlapping portion around the center hole of the stopper plate member. When tightened, the concave and convex portions of the stopper plate member and the overlapping portion and the step portion are more strongly bitten by the concave and convex portions of the both contact surfaces, so that a more intimate contact between the two is formed. .

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing a state in which a strut mount 10 for a vehicle suspension according to a first embodiment is interposed between a piston rod 3 of a shock absorber 2 and a vehicle body-side member 1. 2 to 4 are cross-sectional views of the strut mount 10.
It is shown by a plan view and a sectional view of a main part. FIG. 5 is a sectional view showing a vulcanized molded product M constituting the strut mount 10, and FIG. 6 is a sectional view showing a stopper plate member.

The strut mount 10 includes a cylindrical inner cylinder 11 made of a thick metal plate (for example, SPHE) and a disk-shaped stopper plate member 2 fixed to the upper end of the inner cylinder 11.
0, an outer cylinder 25 disposed coaxially outside the inner cylinder 11, and a rubber elastic body 31 elastically connecting the inner cylinder 11 and the outer cylinder 25. I have. Less than,
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. 5, the inner tube fitting 11 has a cylindrical small diameter portion 12 and a large diameter portion 13 slightly larger than the small diameter portion 12 in the axial direction. The boundary is a step portion 14. The small diameter portion 12 has an upper end opening 12a.
A thin mounting portion 1 having a predetermined length in the axial direction removed from the entire outer peripheral surface in the radial direction to have a thickness of about half.
The boundary between the outer peripheral surface of the mounting portion 15 and the outer peripheral surface of the other portion of the small diameter portion 12 is a step portion 15a. The lower end of the large diameter portion 13 is a flange portion 1 slightly extending toward the axial center.
3a. A cylindrical ball bearing 16 is coaxially and tightly fitted in the large diameter portion 13 and is held in the large diameter portion 13 by a flange portion 13a.
The spring seat 6 for receiving the coil spring 4 of the shock absorber 2 is provided on the exposed surface of the bearing 16 from the opening of the flange portion 13a, as shown in FIG.
Can be attached. The spring seat 6 has a conical cylindrical shape like the outer member 17 described later, and has a flat receiving portion on the outer peripheral side for receiving the coil spring 4 via the dust cover 5.

A substantially conical outer member 17 made of a metal plate and slightly concave in the axial direction as a whole is coaxially disposed radially outside the large diameter portion 13. The upper end side of 17 is an engagement portion 18 having a slightly reduced diameter. The outer member 17 is configured such that the engaging portion 18 is engaged with the position of the step portion 14 between the small diameter portion 12 and the large diameter portion 13, and the lower end thereof extends slightly below the lower end of the large diameter portion 13 in the axial direction. Are located. The outer member 17 has the stepped portion 1 at the engagement portion 18.
It is fixed to the small diameter portion 12 at four positions by welding or the like.

As shown in FIG. 6, the stopper plate member 20 is made of a thick metal plate, has a flat circular container shape with an open top surface, and has an inverted conical cylindrical portion 21 having a short axial length. An annular bottom portion 22 slightly extending radially inward is integrally provided at the lower end. An annular flange portion 23 is provided integrally with the entire circumference of the upper end of the tubular portion 21 so as to extend radially outward with respect to the axis. A center hole 22 a is provided at an inner concentric position of the bottom portion 22, and the inner diameter thereof is slightly larger than the outer diameter of the mounting portion 15. Respective boundaries between the tubular portion 21 and the bottom portion 22 and between the tubular portion 21 and the flange portion 23 are arc-shaped curved surfaces.

Further, on the inner surface (upper surface in the figure) of the bottom portion 22, grooves 24 extending radially from the center hole 22a are provided at a plurality of circumferential positions around the center hole 22a. 6 (c) and 6 (d), the groove portion 24 is a concave portion having an inverted triangular cross section, and its radial end is substantially equal to the outer peripheral position of the overlapping portion 15b of the mounting portion 15 described later. The length is as follows. The material of the stopper plate member 20 is preferably a material that is harder than SPHE, which is the material of the inner tube fitting 11, such as SAPH440. This stopper plate member 2
Regarding 0, the entire shape is formed by subjecting the metal disk to drawing and pressing, and the center hole 22a is formed by punching out the center of the bottom surface portion 22 by punching. When the stopper plate member 20 is formed by press working, the groove 24 is also formed at the same time.

The outer tube fitting 25 is formed by drawing or pressing a single metal plate. The outer tube fitting 25 is formed by turning a conical tube portion 26 and outwardly over the entire circumference at the upper end of the tube portion 26. The folded portion 27 extends substantially to the center in the axial direction of the tubular portion 26 and overlaps the tubular portion 26, and a flat flange portion 28 extending radially from the lower end of the folded portion 27 over the entire circumference. I have. The outer diameter of the lower end of the cylindrical portion 26 is slightly smaller than the outer diameter of the outer member 17. That is, the lower end portion of the outer member 17 is
5 functions as a stopper.

As shown in FIG. 3, the outer shape of the flange portion 28 has an irregular shape in which a top of a substantially equilateral triangle is cut off in an arc shape in plan view. The flange portion 28 is provided with a mounting hole 28a at a substantially central position of a predetermined region corresponding to the top of the substantially equilateral triangle. In addition, at the peripheral edge position of the flange portion 28, the folded portion 2 is perpendicular to the flange portion.
A vertical section 29 is provided which extends slightly in the opposite direction to the section 7.

As shown in FIGS. 2 and 5, the rubber elastic body portion 31 is formed on the outer peripheral surface of the small-diameter portion 12 of the inner cylindrical member 11 from the slightly lower side in the axial direction of the stepped portion 15a. It is disposed over the entire circumference in the circumferential direction between the range between the nearby positions and the entire inner peripheral surface of the cylindrical portion 26 of the outer cylindrical fitting 25, and elastically connects the two fittings 11, 25. Further, a part of the rubber elastic body portion 31 is a protruding portion 32 protruding above the cylindrical portion 26. The protruding portion 32 abuts on the flange portion 23 of the stopper plate member 20 attached to the inner cylinder fitting 11 in a compressed state. The rubber elastic body portion 31 is integrally formed as a rubber vulcanized molded product M which is an intermediate product shown in FIG. 5 by setting the inner cylindrical metal member 11 and the outer cylindrical metal member 25 in a molding die and performing rubber vulcanization molding. Molded.

After the bearing 16 is inserted into the large-diameter portion 13 of the inner cylinder fitting 11 of the rubber vulcanized molded product M, the lower end of the large-diameter portion 13 is bent in the axial direction by drawing to form a flange portion. By forming 13a, the bearing 16 is held in the large diameter portion 13. Next, with respect to the attachment of the stopper plate member 20 to the inner cylinder fitting 11, first, the stopper plate member 20 is fitted to the outer peripheral side of the attaching portion 15 from the bottom surface portion 22 side through the center hole 22a to the step portion 15a. Place. In this state, as shown in detail in FIG.
5 is bent outward, and the overlapping portion 15 b on the tip end side of the mounting portion 15 is overlapped with the stopper plate member 20. The outer peripheral position of the overlapping portion 15b extends from the outer peripheral surface of the small diameter portion 12 to a position radially outside. Further, by pressing the overlapping portion 15b and caulking to the stopper plate member 20,
The stopper plate member 20 is fixed to the mounting portion 15 of the inner cylinder fitting 11 and is formed as the strut mount 10.

Here, a groove 24 is formed on the contact surface of the stopper plate member 20 which comes into contact with the overlapping portion 15b by press working, and the stopper plate member 20 is made of a material harder than the material of the inner cylinder fitting 11. It is formed with. for that reason,
The center hole 22 of the stopper plate member 20 is formed by the overlapping portion 15b.
When the periphery of “a” is pressed, the overlapping portion 15 b is in a state of being cut into the groove 24 of the stopper plate member 20. Further, the overlapping position of the overlapping portion 15b and the groove portion 24 is radially outward from the outer periphery of the small-diameter portion 12, and the contact area between them is widened. Therefore, close contact is formed between the stopper plate member 20 and the overlapping portion 15b, and the stopper plate member 20 is firmly fixed to the small diameter portion 12.

The mounting of the strut mount 10 to the vehicle is performed as described below. As shown in FIG. 1, the strut mount 10 is inserted from below into the opening 1 a of the vehicle body-side member 1, and a bolt 35 is inserted into the mounting hole 28 a of the flange portion 28 of the outer cylinder fitting 25.
The flange portion 28 is fixed to the vehicle body-side member 1 by screwing a nut 36 to a bolt 35 projecting from the vehicle body. The tip of the piston rod 3 of the shock absorber 2 attached to the wheel 7 is a strut mount 10.
Nut 3 is inserted into the shaft hole of the bearing 16
By screwing a, the piston rod 3 is fixed to the strut mount 10.

In the embodiment configured as described above, the groove 24 is provided around the center hole 22a on the inner surface of the bottom portion 22 of the stopper plate member 20, so that the stepped portion 15b of the mounting portion 15 is used. The stopper plate member 20 pressed against the portion 15a is in a state in which the overlapping portion 15b is firmly cut into the groove portion 24, and close contact is formed between the stopper portion 20 and the overlapping portion 15b. Therefore, the stopper plate member 20
Is firmly fixed to the inner tube fitting 11. Furthermore, since the material of the stopper plate member 20 is harder than the material of the inner cylinder fitting 11, the overlapping portion 15b bites into the groove 24 more firmly, and the stopper plate member 20 is more firmly attached to the inner cylinder fitting 11. It will be in a fixed state.

As a result, according to the present embodiment, even when a rebound input is received from the shock absorber 2, the loosening of the fastening portion of the stopper plate member 20 by the mounting portion 15 can be suppressed, and the stopper plate member 20 Rotate,
Further, the inconvenience of dropping from the inner cylinder fitting 11 can be reliably prevented. In addition, it is possible to prevent generation of abnormal noise due to contact between the stopper plate member 20 and the inner cylinder fitting 11 due to the rotation of the stopper plate member 20, and it is possible to improve the riding comfort of the vehicle. In addition, since the mounting portion 15 is made thin, bending work is facilitated, and the inner cylindrical metal fitting 1 is formed.
1 can be reduced in weight.

The strut mount is not limited to the one shown in the above embodiment, but may be one having the structure shown in FIG. The strut mount 40 includes a cylindrical inner cylinder 41, the stopper plate member 20 fixed to the upper end thereof, an outer cylinder 51 disposed coaxially outside the inner cylinder 41, and an inner cylinder 41. A rubber elastic body 55 is provided for elastically connecting between the cylindrical metal fitting 41 and the outer cylindrical metal fitting 51.

The inner tube fitting 41 has a bottomed cylindrical main body 42.
And a receiving member 45 fixed to the bottom thereof.
A mounting hole for mounting a piston rod is formed in the bottom surface of the main body 42 and the receiving member 45, respectively. Body 42
A thin-walled attachment portion 43 formed by removing the outer peripheral surface side by cutting is provided at the upper end side of the, and an outer peripheral side boundary between the attachment portion 43 and other portions is a step portion 44. . The stopper plate member 20 is mounted on the step portion 44 of the main body 42 in the same manner as described in the above-described embodiment, and the mounting portion 43 is bent radially outward to be overlapped.
It is fixed to the main body 42 by being pressed by 3a. The outer tube fitting 51 has a cylindrical portion 52 having a conical surface slightly inclined in a radially increasing direction from above to below.
An annular flange portion 53 is provided at the lower end of the cylindrical portion 52 and extends radially outward with a slight inclination with respect to the axis. About this strut mount 40,
As shown in FIG. 8, it is assembled between the vehicle body side member 1 and the upper end of the piston rod 3 of the shock absorber 2. The strut mount 40 is also used for the strut mount 1 by using the stopper plate member 20.
The same effect as the effect obtained at 0 is obtained.

In the above-described embodiment, the groove 24 is provided on the inner side surface of the bottom portion 22 of the stopper plate member 20. Instead, the outer surface (the lower surface in the figure) of the bottom portion 22 is provided.
May be provided with a groove. Further, in addition to providing the groove portion 24 in the stopper plate member 20, at least one of the overlapping portions 15 b, 43 a and the step portions 15 a, 44 of the mounting portions 15, 43 in the inner cylindrical fittings 11, 41 is pressed or shot blasted. May be provided. Also,
Instead of providing the groove portion 24 in the stopper plate member 20, at least one of the overlapping portions 15b and 43a and the step portions 15a and 44 may be provided with irregularities.

Next, as a modified example of the stopper plate member 20, as shown in FIG. 9, on the outer surface (lower surface in the figure) of the bottom portion 22, a band-shaped uneven portion 24A is formed around the center hole 22a in the entire circumferential direction. It may be provided. Uneven part 24A
By pressing, small projections 24B are regularly formed as shown in an enlarged view in FIG. 9C. The uneven portion may be formed by shot blasting instead of pressing. Further, in addition to or instead of the irregularities 24A on the outer surface (lower surface in the figure) of the bottom surface 22, a band-like irregularity is provided around the inner surface (upper surface in the illustration) center hole 22a of the bottom surface 22 over the entire circumference in the circumferential direction. You may. By adopting the stopper plate member 20, the same effect as shown in the above embodiment can be obtained.

Next, a second embodiment will be described with reference to FIGS. In the present embodiment, the shape of the mounting portion of the inner tube fitting 11 in the first embodiment is changed. As shown in FIG. 10 and FIG.
Is formed at an inner end position within a predetermined range in the axial direction from the upper open end of the small diameter portion 62 to an annular step portion 65a which is bent inward in the direction perpendicular to the axis and slightly extends inward in the radial direction over the entire periphery of the outer peripheral surface. At the same time, the mounting portion 65 is formed at the radially inner end position of the step portion 65a and turned back so as to be parallel to the axial direction. The other components are denoted by the reference numerals and will not be described.
Is the same as

As described above, since the mounting portion 65 of the inner cylindrical metal member 61 is formed, the stopper plate member 20 is inserted into the mounting portion 65 and is brought into contact with the step portion 65a.
The mounting portion 65 is bent radially outward, and the bent portion is overlapped around the center hole 22a of the stopper plate member 20 to form the overlapping portion 65b. Further, the overlapping portion 65
By pressing b against the stopper plate member 20 and caulking, the overlapping portion 65b is in a state of biting into the groove portion 24 of the stopper plate member 20, and a close contact therebetween is formed.
As a result, the same effects as those of the first embodiment can be obtained in the second embodiment. Further, the step portion 65a, the mounting portion 65, and the overlapping portion 65b are formed by bending the inner cylindrical metal member 61, so that the plate thickness is reduced, and the fastening force by the overlapping portion 65b is relatively reduced. I do. However, since the contact surface between the stopper plate member 20 and the overlapping portion 65b and the step portion 65a of the mounting portion 65 is provided with irregularities, it is possible to cover a decrease in plate thickness, and secure close contact between the two. Is done.

Next, a third embodiment will be described with reference to FIGS. In the present embodiment, the shape of the mounting portion of the inner tube fitting 11 in the first embodiment is changed. As shown in FIGS. 12 and 13, an inner cylinder fitting (inner cylinder) 71 is integrally formed with an outer member 77 (outer cylinder) superimposed on the outer peripheral surface thereof. The outer member 77 has an upper end arranged at a predetermined distance in the axial direction from an upper opening end of the small-diameter portion 72 of the inner metal fitting 71,
The upper end is a stepped portion 77 a with respect to the small diameter portion 72. A portion from the step 77a of the small diameter portion 72 to the opening end side is a mounting portion 75. The other configurations are denoted by the reference numerals and are not described, but are the same as those of the inner cylinder fitting 11 described above.

As described above, since the mounting portion 75 of the inner cylindrical metal member 71 is formed, the mounting portion 75 is attached to the mounting portion 75 with the stopper plate member 20 being inserted into contact with the step portion 77a. It is bent radially outward and overlaps around the center hole 22a of the stopper plate member 20 to form an overlapping portion 75
b. Further, by pressing the overlapping portion 75b against the stopper plate member 20 and caulking, the overlapping portion 75b is pressed.
b enters the groove 24 of the stopper plate member 20, and a close contact between the two is formed. As a result, the third
In the embodiment, the same effects as those of the first embodiment can be obtained. Further, since the upper end of the outer member 77 is a stepped portion 77a with respect to the inner cylindrical member 71, when the outer cylindrical member 25 and the stopper plate member 20 come into contact with each other, a slight displacement occurs in the axial direction, The stopper plate member 20 may be loosened. However, unevenness is provided on any of the contact surfaces of the stopper plate member 20 and the overlapping portion 75b and the step portion 77a of the mounting portion 75, and the close contact between them is ensured. Loosening can be prevented.

In the second and third embodiments,
Instead of providing the groove 24 on the inner surface of the bottom portion 22 of the stopper plate member 20, a groove may be provided on the outer surface (the lower surface in the drawing) of the bottom portion 22. Further, instead of providing the groove on the bottom surface 22 of the stopper plate member 20, unevenness by press working or shot blasting may be provided. Further, in addition to the groove portion 24 of the stopper plate member 20, the overlapping portions 65b, 75b of the mounting portions 65, 75 of the inner cylindrical fittings 61, 71 are provided.
Also, at least one of the steps 65a and 77a may be provided with unevenness by press working or shot blasting.

In the above embodiment, an example is shown in which the present invention is applied to a so-called input-integrated strut mount in which vibration input from a shock absorber is received only at the inner cylinder fitting side. It is also possible to apply to a so-called separate input type strut mount that receives a vibration input from the shock absorber on the inner cylinder fitting and the outer cylinder fitting side. Further, the rubber elastic portion may be formed of an elastic elastomer or the like instead of the rubber elastic body. 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.

[0042]

According to the first aspect of the present invention, at least one of the surfaces where the stopper plate member and the overlapped portion and the stepped portion are in contact with each other is made uneven. As a result, the stopper plate member is firmly fixed to the inner cylinder fitting. In addition, even if the pressing force of the mounting portion against the stopper plate member varies to some extent, the contact surfaces are indented by the unevenness, so that the stopper plate member is stably and firmly fixed to the inner cylinder.

As a result, when there is a rebound input from the suspension side, it is possible to suppress the attachment portion from loosening at the fastening portion of the stopper plate member, and the stopper plate member rotates or falls off from the inner cylinder. Inconvenience can be reliably prevented. Further, it is possible to prevent the generation of abnormal noise due to the contact between the stopper plate member and the inner cylindrical fitting due to the rotation of the stopper plate member, and it is possible to improve the riding comfort of the vehicle. Further, even if the pressing force of the mounting portion against the stopper plate member varies to some extent, the stopper plate member is stably and firmly fixed to the inner cylinder, so that the operation of attaching the stopper plate member to the inner cylinder is facilitated. In addition, the reliability of the operation is improved.

The mounting portion of the inner cylindrical fitting is reduced in thickness in the axial direction by a predetermined thickness over the entire circumference of the outer peripheral surface within a predetermined range in the axial direction from the upper open end, and is made thinner. The boundary between the portion and the outer peripheral surface can be a step. Further, at a position separated from the upper opening end by a predetermined distance in the axial direction, an annular step portion is bent inward in a direction perpendicular to the axis and slightly extends inward in the radial direction over the entire circumference of the outer peripheral surface, and a radially inward portion of the step portion is formed. At the end position, it may be folded back so as to be parallel to the axial direction to form a mounting portion. Furthermore, the inner tubular portion and the outer tubular portion superposed on the outer peripheral surface thereof are integrally formed, and the upper end of the outer tubular portion is disposed at a predetermined distance in the axial direction from the upper open end of the inner tubular portion. The upper end may be a step, and the portion from the step of the inner cylindrical portion to the upper end opening end may be the attachment. With these configurations, the effect of the invention of claim 1 can be obtained (claims 2 to 4).
Effect of the invention).

In addition, by providing a linear groove on the contact surface of the stopper plate member with which the overlapping portion of the mounting portion of the inner cylinder member contacts, the overlapping portion cuts into the linear groove of the stopper member, thereby providing a tight seal. Since the contact can be formed and the contact area between the two can be increased, a more intimate contact is formed (the effect of the invention of claim 5). Further, the stopper plate member, which is made of a material harder than the inner cylinder, is pressed against the contact surface with the mounting portion, so that the concave and convex portions of the both contact surfaces are formed more strongly, and a tighter contact between the two contact surfaces is formed. (The effect of the invention of claim 6).

[Brief description of the drawings]

FIG. 1 is a partial sectional view schematically showing a suspension portion of a vehicle having a strut mount according to a first embodiment of the present invention.

FIG. 2 shows the strut mount of FIG.
It is sectional drawing of a line direction.

FIG. 3 is a plan view showing the strut mount.

FIG. 4 is an enlarged cross-sectional view showing, in an enlarged manner, the periphery of a mounting portion of an inner cylinder fitting of the strut mount.

FIG. 5 is a longitudinal sectional view showing a rubber vulcanized molded product before mounting a stopper plate member and a bearing in the strut mount.

6A and 6B are a sectional view taken along line 6A-6A, a bottom view, an enlarged view taken along line 6C-6C, and an enlarged sectional view showing the inside of a circle 6D showing the stopper plate member in detail.

FIG. 7 is a cross-sectional view schematically showing a strut mount of another configuration.

FIG. 8 is a partial cross-sectional view schematically showing a suspension portion of the vehicle equipped with the strut mount.

FIG. 9A-9A showing a stopper plate member according to a modified example.
It is the sectional view in the line direction, the bottom view, and the enlarged sectional view in the 9C-9C line direction.

FIG. 10 is a cross-sectional view illustrating a strut mount according to a second embodiment.

FIG. 11 is an enlarged cross-sectional view showing, in an enlarged manner, the periphery of a mounting portion of an inner cylinder fitting of the strut mount.

FIG. 12 is a sectional view showing a strut mount according to a third embodiment.

FIG. 13 is an enlarged cross-sectional view showing, in an enlarged manner, the periphery of a mounting portion of an inner cylinder fitting of the strut mount.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Body side member, 2 ... Shock absorber, 3 ... Piston rod, 10 ... Strut mount, 11 ... Inner cylinder fitting, 12 ... Small diameter part, 13 ... Large diameter part, 14 ... Step part, 15
... Mounting part, 15a ... Step part, 15b ... Overlapping part, 17 ... Outer member, 20 ... Stopper plate member, 21 ... Cylinder part, 22 ... Bottom part, 22a ... Center hole, 24 ... Groove part, 24A ...
25 ... outer cylinder fitting, 26 ... cylinder part, 27 ... folded part, 28 ...
Flange part, 31 ... rubber elastic body part, 41 ... inner cylinder fitting, 4
Reference numeral 2: body, 43: mounting portion, 43a: overlapping portion, 44: step portion, 61: inner cylinder fitting, 62: small diameter portion, 65: mounting portion, 6
5a: Step, 65b: Overlap, 71: Inner tube fitting, 72:
Small-diameter portion, 75: mounting portion, 75b: overlapping portion, 77: outer member, 77a: step portion.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3D001 AA17 AA18 BA02 DA09 3J059 AA04 AB11 BA42 BB01 BC06 BD01 BD05 BD06 DA15 EA02 GA03 3J069 AA69 CC02 DD26

Claims (6)

[Claims] 1. An attachment part which is a cylindrical metal fitting and is entirely coaxially recessed in an axial direction in the entire outer peripheral surface in a range from an upper open end to a predetermined position in an axial direction. An inner cylindrical metal fitting having a stepped boundary between the outer peripheral surface and the outer peripheral surface of the other portion; a flat metal fitting having a center hole having an inner diameter substantially equal to an outer diameter of a mounting portion of the inner cylindrical metal fitting; Then, in a state of being inserted and fitted to the outer peripheral surface side of the mounting portion at the center hole and abutting on the step portion, the mounting portion is bent radially outward and overlapped around the center hole, A stopper plate member fixed to the inner cylinder by being pressed by the overlapped portion; and a stopper plate disposed coaxially outside the inner cylinder and coping with an excessive vibration input. The movement in the axial direction is restricted by the end facing the member abutting on the stopper plate member. And a cylindrical elastic member for elastically connecting the inner cylinder and the outer cylinder to each other, wherein the inner cylinder has a lower opening. In a strut mount for a vehicle suspension, which is coaxially fixed to an upper end portion of a piston rod of a shock absorber at an end side and the outer cylinder is fixed to a vehicle body-side member, the overlapping portion in a mounting portion of the inner cylinder member And at least one contact surface of the stopper plate member contacting the step portion and / or at least one surface of the overlapping portion and the step portion contacting the stopper plate member are made uneven. And strut mount. 2. The mounting portion of the inner cylindrical fitting is formed so as to have a predetermined thickness in the axial direction over the entire outer peripheral surface in a range from the upper opening end to a predetermined position in the axial direction, so as to be thin. The strut mount according to claim 1, wherein a boundary between an outer peripheral surface of the mounting portion and an outer peripheral surface of another portion is the step portion. 3. The step wherein the inner cylinder is bent radially inward in the direction perpendicular to the axis over the entire circumference of the outer peripheral surface at a position separated from the upper opening end by a predetermined distance in the axial direction, and slightly extends radially inward. 2. The step according to claim 1, wherein the stepped portion is folded back so as to be parallel to the axial direction at a radially inner end position of the step portion and is formed on the mounting portion. 3. Strut mount. 4. The inner tubular member is integrally formed by an inner tubular portion and an outer tubular portion superposed on the outer peripheral surface of the inner tubular portion, and an upper end of the outer tubular portion is formed by the inner tubular portion. The upper end of the outer tubular portion is disposed at a predetermined distance in the axial direction from the upper open end, and the upper end of the outer tubular portion is the step portion with respect to the inner tubular portion,
The strut mount according to claim 1, wherein a portion of the inner cylindrical portion from the step portion to an upper end opening end is the mounting portion. 5. The groove according to claim 1, wherein the concave / convex shape provided on the contact surface of the stopper plate member with which the overlapping portion of the mounting portion of the inner cylinder member comes into contact is a linear groove. 5. The strut mount according to any one of 4. 6. The method according to claim 1, wherein a material of the stopper plate member is harder than a material of the inner cylinder.
The strut mount according to any one of claims 1 to 5, wherein