JP2602727Y2 - Upper support for vehicle suspension - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an upper support for a vehicle suspension.

[0002]

2. Description of the Related Art FIG. 7 shows a shock absorber 100,
An example of a vehicle suspension mechanism having a wheel disc 101, a lower arm 102, and a coil spring 104 is shown. In such a suspension mechanism, the upper support 107 is provided between the shock absorber 100 and the vehicle body. The upper support has a function of suppressing vibration transmitted from the wheel side to the vehicle body through the shock absorber 100. As such an upper support, conventionally, as shown in FIG. 8, an inner cylinder 201 having a central hole, an outer cylinder 202 arranged on the outer peripheral surface side of the inner cylinder 201, and a space between the inner cylinder 201 and the outer cylinder 202. And an elastic body 205 made of a rubber material. Here, the outer cylinder 202 has a flange portion 206 extending radially outward and an appropriate number of bolt insertion holes 2 provided on the flange portion 206 at predetermined intervals in a circumferential direction.
07. In the upper support, a swelling portion 208 (a portion indicated by hatching in FIG. 8 and swelling toward the near side of the paper) is formed around the bolt insertion hole 207. Therefore, the bolt insertion hole 207
When the bolt inserted into the upper support is screwed into the mounting portion of the vehicle body and the flange portion 206 is applied to the mounting portion to mount the upper support on the vehicle body, there is a processing error or the like on the flange portion of the upper support or the mounting surface of the vehicle body. However, except for the bulging portion 208, the outer cylinder 202 is securely fixed in a state where a predetermined gap is secured between the flange portion 206 and the mounting portion of the vehicle body, thereby suppressing abnormal noise during traveling. obtain.

Conventionally, an upper support shown in FIG. 9 is also known. In the upper support, a wide bulging portion 210 (a portion shown by hatching in FIG. 9 and bulging toward the front of the drawing) is formed between adjacent bolt insertion holes 207. Even when the upper support is mounted on the vehicle body, the bulging portion 210 is in pressure contact with the vehicle body, so that abnormal noise during traveling can be suppressed.

Conventionally, an upper support shown in FIG. 10 is also known (Japanese Utility Model Application No. 63-138090).
In this upper support, the flange portion 2 of the outer cylinder 202 is used.
At 06, a seal portion 212 made of a rubber material (bulging toward the near side of the drawing) is adhered. Seal part 212
Is formed by a first seal portion 213 extending in a ring shape and a second seal portion 214 arranged between the adjacent bolt insertion holes 207 and integrated with the first seal portion 213. When this upper support is mounted on the vehicle body, the seal part 2
Since the sealing member 12 is pressed between the vehicle body and the flange portion 206 to exert a sealing effect, it is possible to suppress intrusion of muddy water, dust and the like, and to provide a wide-range contact including the sealing portion 212, thereby suppressing generation of abnormal noise. As shown in FIG.
Since 4 is disposed between the bolt insertion holes 207, the sealing performance can be ensured even between the bolt insertion holes 207 where the sealing performance tends to deteriorate.

[0005]

[Problems to be Solved by the Invention] By the way, FIGS.
Although the upper support shown in the figure can suppress abnormal noise,
The sealing action between the vehicle body and the upper support is not sufficient. Further, in the upper support shown in FIG. 10, although the sealing function can be achieved, the sealing portion is made of an elastic material when the upper support is mounted on the vehicle body, so that the processing error (flatness or the like) of the flange portion or the mounting surface of the vehicle body is caused. Variations in the degree of tightening occur inevitably, which causes a problem in that the degree of tightening of the seal is insufficient and the sealing effect is reduced, or the degree of tightening of the seal is excessive and the durability of the seal decreases.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object the purpose of making it possible to make the degree of tightening of the seal portion close to a certain level, avoid excessive tightening of the seal portion, and stabilize the mounting strength to the vehicle body. The object of the present invention is to provide an upper support for a vehicle suspension.

[0007]

An upper support for a vehicle suspension according to the present invention is disposed substantially coaxially with an inner cylinder having a center hole and a predetermined distance on an outer peripheral surface side of the inner cylinder.
A flange portion extending radially outward and applied to the mounting portion of the vehicle body, and an appropriate number of mounting bolts provided at the flange portion at predetermined intervals in the circumferential direction and screwed to the mounting portion of the vehicle body generally coaxial with the outer tube, and an elastic body made of an elastic material is disposed between the inner cylinder and the outer cylinder, Re et provided on a surface facing the vehicle body of the outer cylinder and an outer cylinder having a number of bolt insertion holes And a seal portion which is made of an elastic material extending in a ring shape and is pressed between the vehicle body and the flange portion of the outer cylinder is substantially coaxial with the outer cylinder and between the bolt insertion holes adjacent to each other. It is extended intermittently with a gap from the bolt insertion hole provided, and the bolt inserted through the bolt insertion hole is screwed into the mounting part of the vehicle body and contacts the vehicle body when the flange part is applied to the mounting part.
It is characterized in that with the projecting portion you touch.

The protruding portion protrudes from the flange portion by a predetermined amount, and has a small width and a long length. The amount of protrusion of the ridge portion can be appropriately selected according to the thickness of the seal portion and the like. The ridge is formed so as to face the vehicle body. These ridges are adjacent to each other in the flange
Have been generally coaxial Nino the Activity formed between the bolt insertion holes to set, in this case, it is formed intermittently at a predetermined interval with respect to the bolt insertion hole.

[0009]

The operation of the upper support of the present invention will be described together with the method of use. By screwing the bolt inserted into the bolt insertion hole to the mounting portion of the vehicle body, the flange portion is applied to the mounting portion of the vehicle body. At this time, the ridge contacts the vehicle body. Therefore, variations in the degree of tightening due to processing errors and the like on the flange portion and the mounting surface of the vehicle body are avoided,
As a result, the degree of tightening of the seal portion is regulated to be constant.
In particular, according to the upper support of the present invention, the ridges are
Between bolt insertion holes adjacent to each other in the flange
Since it is provided, between the bolt insertion holes adjacent to each other
The degree of tightening of the seal portion is regulated to be constant.

[0010]

(First Embodiment) A first embodiment of the present invention will be described with reference to FIGS. (Configuration) This upper support is composed of a steel inner cylinder 1 and a steel outer cylinder 2.
And an elastic body 3 and a seal portion 4.

The inner cylinder 1 has a first inner cylinder 10 having a bottom 10a.
And a second inner cylinder 11 having a ceiling wall 11a connected to the bottom 10a by welding, and having a central hole 12. Outer cylinder 2
Are arranged substantially coaxially on the outer peripheral surface side of the inner cylinder 1 at a predetermined interval. As shown in FIG. 2, the outer cylinder 2 is a first outer cylinder 2
1 and a second outer cylinder 22. The first outer cylinder 21 has a first extension 20 and a tapered cylinder 21a. The second outer cylinder 22 is
A second extending portion 23 connected to the first extending portion 20 by welding,
And a tapered cylinder 22a having an opening 22b. here,
The first extending portion 20 and the second extending portion 23 form a flange portion 24 extending radially outward. As shown in FIG. 1, the flange portion 24 has a substantially triangular rice ball shape. A total of three bolt insertion holes 25 are provided near the corners of the flange portion 24.
Are provided at predetermined intervals in the circumferential direction.

The elastic body 3 attenuates vibration during traveling, and is formed of a vulcanized rubber material.
And the outer cylinder 2 and the inner cylinder 1 are vulcanized and bonded. The elastic body 3 is pre-compressed in the radial direction by reducing the diameter of the outer cylinder 2. The elastic body 3 has a concave surface 3e,
3f. As shown in FIG. 3, the seal portion 4 is vulcanized and bonded to a boundary area between the second extending portion 23 and the tapered cylinder 22a of the outer cylinder 2. The seal portion 4 is provided substantially continuously in a ring shape substantially coaxially with the outer cylinder 2. The seal portion 4 has lip portions 40 and 41 in its cross section as shown in FIG.
Is formed integrally with the elastic body 3 from a vulcanized rubber material.

As shown in FIG. 1, two projecting ridges 5 are formed in the flange portion 24 of the outer cylinder 2 between two adjacent bolt insertion holes 25. The ridge portion 5 extends substantially coaxially and arcuately with respect to the outer cylinder 2 at a predetermined length.
They are intermittently arranged in a ring shape along gaps 27 and 28 along the circumferential direction. This ridge portion 5 has a small width dimension,
Large length dimension. In this embodiment, the width D1 of the ridge 5
Is about 1 to 10 mm, and the surface 24 of the flange portion 24 is
The protrusion height H1 (see FIG. 3) of the ridge portion 5 from FIG.
It is about 3 mm.

FIG. 5 shows a molding die 6 for molding the upper support. The mold 6 includes an injection hole 60 and a ring-shaped recess 61.
An upper die 64 having a ring-shaped convex portion 62, a middle die 66 having a ring-shaped convex portion 65, and a lower die 69 having a convex portion 67 and a convex portion 68 protruding at the center of the convex portion 67. , A molding cavity 6a. The upper die 64 includes a groove 64a for receiving the ridge portion 5 and a holding portion 64 located inside the groove 64a.
b and a cavity 64c for molding the seal portion 4. The groove depth of the groove 64a is larger than the height of the ridge 5 so as to accommodate the ridge 5. Groove 64
a, the pressing portion 64b and the cavity 64c are formed in a ring shape coaxially with the axis of the ring-shaped convex portion 62 of the upper die 64.

As shown in FIG. 5, the outer cylinder 2 and the inner cylinder 1 are arranged in the molding cavity 6a of the molding die 6, and
The flange portion 24 is sandwiched between the middle mold 66 and the upper mold 64. At this time, the ridge 5 is accommodated in the groove 64a, and the pressing portion 64b of the upper die 64 is pressed against the portion 24f of the flange portion 24. In this state, a rubber material is charged from the injection hole 60 into the molding cavity 6a and vulcanized, whereby the upper support is manufactured. (Operation) In using the upper support, first, a bolt E is inserted into the bolt insertion hole 25, and the bolt E is screwed into a screw hole of the plate-shaped mounting portion B1 of the vehicle body B. Attach to the attachment part B1. Thereby, the flange portion 24 is applied to the mounting portion B1 of the vehicle body B. At this time, as shown in FIG. 4, the upper surface portion 5a of the ridge portion 5 comes into pressure contact with the mounting portion B1 of the vehicle body B. Therefore, the flange portion 24 and the vehicle body B
The processing error (flatness) of the mounting portion B1 is corrected, and the gap T1 between the outer cylinder 2 and the vehicle body can be made close to a constant, whereby the compression amount in the thickness direction of the seal portion 4, that is, the degree of tightening is regulated to a constant. You. (Effects) As described above, according to the present embodiment, the upper surface portion 5a of the ridge portion 5 comes into contact with the mounting portion B1 of the vehicle body B, so that the flange portion 24 of the outer cylinder 2 and the mounting portion B1 of the vehicle body B are connected. The processing error is corrected, and the gap T1 between the flange portion 24 and the vehicle body B can be made closer to a constant value, whereby the compression amount in the thickness direction of the seal portion 4, that is, the degree of tightening is made constant. Therefore, excessive tightening of the seal portion 4 can be avoided.

Further, the flange portion 24 is attached to the mounting portion B1 of the vehicle body B.
In the case where the bolt E is screwed into the bolt hole of the mounting portion B1 of the vehicle body B, the vicinity of the bolt insertion hole 25 of the flange portion 24 is screwed into the mounting portion B1 of the vehicle body B. Although approaching, the portion between the adjacent bolt insertion holes 25 tends to be farther from the mounting portion B1 of the vehicle body B than near the bolt insertion holes 25. Therefore, the degree of tightening of the seal portion 4 between the bolt insertion holes 25 is not sufficient, which may cause intrusion of muddy water and dust between the bolt insertion holes 25. In this respect, in the present embodiment, the ridge 5 is located between the bolt insertion holes 25, and the upper surface 5a of the ridge 5 contacts the mounting portion B1 of the vehicle body B. The degree of tightening of the seal portion 4 at the portion between them, and thus the sealing property, is kept constant, so that intrusion of muddy water, dust and the like between the bolt insertion holes 25 can be reliably suppressed.

In this embodiment, the ridge 5 is elongated and has a small projected area. Therefore, when the ridge 5 is mounted with the same pressing force, the mounting portion B1 of the vehicle body B is provided.
In contrast, the biting property of the ridge portion 5 increases. Therefore, the resistance of the upper support to the lateral G generated when the vehicle body B turns can be ensured. This is different from the conventional case shown in FIGS. 8 and 9 in which the bulging portions 208 and 210 are planar and have a large projected area.

Further, according to the present embodiment, when the molding die 6 is clamped for molding, the ring-shaped pressing portion 64b of the upper die 64 presses the portion 24f of the flange portion 24, so that the portion 24f is pressed. The rubber can be prevented from intruding between the pressing portion 64b and the pressing portion 64b, so that the sealing ability of the seal portion 4 can be ensured. The upper support is attached to the vehicle body B with the periphery of the bolt insertion hole 25 of the flange portion 24 and the bolt insertion hole 25.
By being press-fitted over substantially the entire circumference with the ridge portion 5 and being integrally mounted, the mounting strength of the upper support can be improved, and generation of abnormal noise can be reliably prevented.

Furthermore, in this embodiment, the projection 5 is narrow and elongated, so that its projected area is small. Therefore, at the time of mounting the upper support, the possibility that foreign matter may be caught between the ridge portion 5 and the mounting portion B1 of the vehicle body B can be reduced, so that the distance between the flange portion 24 and the mounting portion B1 of the vehicle body B can be reduced. This is advantageous for keeping the gap constant. Second Embodiment FIG. 6 shows a second embodiment of the present invention. The second embodiment has basically the same configuration as the first embodiment. However, in the second embodiment, one ridge 8 is formed between the two bolt insertion holes 25. Also in the second embodiment, the first ridge portion 8
Basically the same operation and effect as the embodiment can be obtained.

In the first and second embodiments, the seal portion 4 is formed by integral vulcanization using the same material as the elastic member. However, the seal portion 4 is not limited to this. It is also possible to form a material of the same or different rubber material as that of the elastic material 3 simultaneously with the vulcanization molding of the elastic body 3 in a non-adhered state with respect to the flange portion 24. Or it may be equipped by non-adhesion.

[0021]

According to the upper support for the vehicle suspension of the present invention, the bolt insertion adjacent to the flange portion is provided.
A ridge is provided between the through holes at a distance from the bolt insertion hole.
Therefore, when the flange is mounted on the mounting part of the vehicle body, the upper surface of the ridge contacts the mounting part of the vehicle body,
The gap between the part and the vehicle body attachment portion between bolt holes of the flange portion of the outer cylinder is regulated to a constant, thereby provided adjacent
The amount of compression of the seal portion in the thickness direction between the bolt insertion holes, that is, the degree of tightening is fixed. Therefore, excessive tightening of the seal portion is avoided. Especially between the bolt insertion holes
Excessive tightening of the seal in the case is avoided. In addition, since the ridge portion is elongated, the projected area of the ridge portion itself is small, so that the mountability to the mounting portion of the vehicle body is increased, and the resistance to the lateral G or the like can be increased even when the lateral G or the like acts.

[Brief description of the drawings]

FIG. 1 is a plan view of an upper support.

FIG. 2 is a sectional view taken along line XX of FIG.

FIG. 3 is an enlarged sectional view showing a ridge portion and a seal portion.

FIG. 4 is a cross-sectional view of a state in which a flange portion is applied to a mounting portion of a vehicle body.

FIG. 5 is a sectional view showing a molding die.

FIG. 6 is a plan view of an upper support according to another embodiment.

FIG. 7 is a perspective view of a main part of the vehicle suspension.

FIG. 8 is a plan view schematically showing a conventional upper support.

FIG. 9 is a plan view schematically showing another conventional upper support.

FIG. 10 is a plan view schematically showing another conventional upper support.

[Explanation of symbols]

In the figure, 1 indicates an inner cylinder, 2 indicates an outer cylinder, 3 indicates an elastic body, 4 indicates a seal portion, and 5 indicates a ridge portion.

Claims (1)

(57) [Scope of request for utility model registration] 1. An inner cylinder having a center hole, and a flange portion which is disposed substantially coaxially on the outer peripheral surface side of the inner cylinder at a predetermined distance, extends radially outward, and is applied to a mounting portion of a vehicle body. An outer cylinder having a suitable number of bolt insertion holes provided on the flange portion at a predetermined interval in a circumferential direction and through which mounting bolts screwed to the mounting portion of the vehicle body are inserted, and the inner cylinder; An elastic body made of an elastic material disposed between the outer cylinder and an elastic body provided on a surface of the outer cylinder facing the vehicle body and made of an elastic material extending substantially coaxially with the outer cylinder in a ring shape; The flange portion of the outer cylinder is provided substantially coaxially with the outer cylinder and between the bolt insertion holes adjacent to each other, and is spaced from the bolt insertion hole. And intermittently extend, and screw the bolt inserted through the bolt insertion hole into the mounting portion of the vehicle body. Upper support for vehicle suspension, characterized in that with a to that protrusion come in contact with the vehicle body when the wanted against the flange portion to the mounting portion.