JPH0547574U - Upper support for vehicle suspension - Google Patents

Abstract

(57) [Abstract] [Purpose] In the upper support for a suspension of the outer cylinder drawing type, the seal portion 4 and the elastic body 3 can be integrally formed, whereby the risk of the seal portion 4 coming off can be eliminated, and the cost can be reduced. It is also advantageous in terms of down. [Structure] An inner cylinder 1, an outer cylinder 2, an elastic body 3 made of rubber, and a rubber seal portion 4 extending in a ring shape. The outer cylinder 2 includes a cylindrical portion 20 to be drawn, a flange portion 22,
Plural bolt insertion holes 25 formed in the flange portion 22
With and. A plurality of through holes 26 penetrating the flange portion 22
The elastic body 3 and the seal portion 4 are integrally molded by the rubber portion 33 loaded in the. The through hole 26 closest to the mounting hole 25 is formed at a position away from the core of the bolt insertion hole 25 by an angle θ1 (20 degrees) or more in a virtual circle centered on the axis P2.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an upper support for vehicle suspension. This upper support can be applied to the type in which the outer cylinder is squeezed.

[0002]

[Prior Art]

 FIG. 7 shows an example of a vehicle suspension mechanism having a shock absorber 100, a wheel disc 101, a lower arm 102, and a coil spring 104. In such a suspension mechanism, an upper support 107 is provided between the shock absorber 100 and the vehicle body. The upper support 107 has a function of suppressing vibration transmitted from the wheel side to the vehicle body through the shock absorber 100.

In an upper support in recent years, as shown in FIG. 8, an inner cylinder 201, an outer cylinder 202 arranged on the outer peripheral surface side of the inner cylinder 201, and an inner cylinder 201 and an outer cylinder 202 are arranged. An elastic body 205 made of a rubber material and a dust seal 210 provided on the outer peripheral surface of the outer cylinder 202 are used. A flange portion 206 formed radially outward of the outer cylinder 202 is formed with a suitable number of bolt insertion holes 207 provided at predetermined intervals along an imaginary line around the axis P1. .. Then, the mounting bolt 213 inserted through the bolt insertion hole 207 is screwed into the vehicle body to attach the upper support to the vehicle body. At this time, since the dust seal 210 is pinched by the vehicle body and the outer cylinder 202, a sealing action is exerted, and intrusion of dust, muddy water, etc. can be avoided.

As such an upper support with a dust seal, an outer cylinder non-throttle type and an outer cylinder throttle type are provided. The outer cylinder non-throttled type upper support with dust seal is integrally formed with the elastic body 205 by extending the extending portion 211 at the upper end of the outer cylinder 202, as shown concretely in FIG. Therefore, the risk of the dust seal 210 falling off the outer cylinder 202 is eliminated, and the cost can be reduced by integration.

On the other hand, the outer cylinder throttle type upper support with dust seal basically has the same constituent elements as the outer cylinder non-throttle type upper support. However, it differs in that the outer cylinder is squeezed to apply precompression to the elastic body, and that the dust seal is a separate part from the elastic body, and the dust seal is attached to the outer peripheral part of the outer cylinder after squeezing the outer cylinder. ..

[0006]

[Problems to be solved by the device]

 By the way, it is not a good idea to draw the outer cylinder 202 in the upper support with dust seal of the outer cylinder non-throttled type shown in FIG. If the outer cylinder 202 is squeezed, the diameter reduction degree of the upper end of the outer cylinder 202 is large, so that the extended portion 211 extended at the upper end of the outer cylinder 202 is not maintained in a good state, and therefore the dust seal 210 is This is not preferable in terms of maintaining good sealability.

Therefore, in the outer cylinder throttle type upper support with dust seal, it is not possible to adopt a means for integrating the dust seal 210 and the elastic body 205 with the extension portion 211 as shown in FIG. A means to attach a separate dust seal after squeezing the outer cylinder is adopted. However, in this case, since the dust seal is a separate part from the elastic body, the risk of the dust seal coming off cannot be eliminated, and cost reduction is not always sufficient.

The present invention makes it possible to integrally form the seal portion and the elastic body in the upper support with a dust seal of the outer cylinder drawing type, thereby eliminating the risk of the seal coming off, which is also advantageous in terms of cost reduction. The purpose is to provide upper support for vehicle suspension.

[0009]

[Means for Solving the Problems]

 An upper support for a vehicle suspension according to the present invention includes an inner cylinder, a cylindrical portion that is arranged on the outer peripheral side of the inner cylinder with a predetermined interval and is drawn, and a flange portion that extends radially outward from the cylindrical portion. An outer cylinder having at least two bolt insertion holes formed in the flange portion at predetermined intervals along a virtual circle centering on the axis of the cylinder portion and through which mounting bolts to be mounted on the vehicle body are inserted, and an inner cylinder And an elastic body made of a rubber material disposed between the outer cylinder and the outer cylinder, and a ring-shaped member provided in a boundary region between the cylinder portion and the flange portion on the surface of the outer cylinder facing the vehicle body And a seal portion made of a rubber material that extends over the outer cylinder. Duplications formed apart It has an individual through hole, the elastic body and the seal part are integrally molded through the rubber part that passes through each through hole, and the hole core of the through hole closest to the bolt insertion hole is the outer cylinder. It is characterized in that it is set at a position 20 degrees or more away from the core of the bolt insertion hole in a virtual circle centered on the axis of the part.

[0010]

[Action]

 The operation of the upper support of the present invention will be described together with its usage. The upper support is attached to the vehicle body by screwing the mounting bolts, which are inserted through the bolt insertion holes, into the mounting portions of the vehicle body. At this time, since the elastic body and the seal portion are integrally formed via the rubber portion passing through each through hole of the outer cylinder, the seal portion is always integrated with the elastic body.

Further, when the upper support is attached to the vehicle body, the strain stress is larger in the outer cylinder near the bolt insertion hole than in other places. Therefore, if the through hole is formed close to the bolt insertion hole, cracks may occur near the bolt insertion hole of the outer cylinder if the outer cylinder is made thin to reduce the weight and so on. is there. In this respect, in the present invention, the through hole closest to the bolt insertion hole is formed at a position separated by 20 degrees or more from the hole core of the bolt insertion hole in a virtual circle centered on the axis of the outer cylinder. Therefore, the strength of the outer cylinder near the bolt insertion hole is secured.

[0012]

【Example】

 First Embodiment A first embodiment of the present invention will be described with reference to FIGS. Configuration This upper support is formed of an inner cylinder 1 made of metal, an outer cylinder 2 made of metal, an elastic body 3, and a dust seal 4 as a seal portion.

As shown in FIGS. 1 and 2, the inner cylinder 1 has a relatively thick right cylindrical shape and has a central hole 11. The outer cylinder 2 is arranged substantially coaxially on the outer peripheral surface side of the inner cylinder 1 with a predetermined interval. The outer cylinder 2 is composed of a cylinder portion 20 and a wide flange portion 22 extending radially outward from a lower end portion of the cylinder portion 20. Of the tubular portion 20, the upper end portion 20a side is mainly drawn, so that the tubular portion 20 has a conical tubular shape as shown in FIG.

FIG. 3 and FIG. 4 show the form of only the outer cylinder 2. As shown in FIG. 3, the flange portion 22 of the outer cylinder 2 is provided with a total of two bolt insertion holes 25 at 180 ° intervals in a virtual circle A centered on the axis P2 of the cylinder portion 20. Further, a plurality of through holes 26 penetrating in the thickness direction of the flange portion 22 of the outer cylinder 2 are formed in a virtual circle B centering on the axis P2 of the cylinder portion 20 of the outer cylinder 2. Here, the hole core of the through hole 26 1 closest to the bolt through hole 25 is set at a position separated from the hole center of the bolt through hole 25 in the virtual circle B by an angle θ1, that is, 35 degrees. Further, the flange portion 22 of the outer cylinder 2 has a bulging portion 27 formed between two adjacent bolt insertion holes 25. In FIG. 3, the bulging portion 27 bulges upward by about 0.5 mm on the paper surface. The bulging portion 27 extends in a predetermined length in an arc shape.

The elastic body 3 attenuates vibrations during traveling, is made of a vulcanized rubber material, and is arranged between the inner cylinder 1 and the outer cylinder 2, and the outer cylinder 2 and the inner cylinder 1 are disposed. Is vulcanized and bonded. The elastic body 3 is pre-compressed in the radial direction by squeezing the cylindrical portion 20 of the outer cylinder 2. The upper surface 3a and the lower surface 3b of the elastic body 3 are tapered. As shown in FIG. 2, the dust seal 4 is vulcanized and adhered in the boundary region of the outer cylinder 2 between the cylindrical portion 20 and the flange portion 22. As shown in FIG. 1, the dust seal 4 is formed substantially coaxially in a ring shape so as to make one turn around the axis P2 of the outer cylinder 2. The dust seal 4 is integrally formed with the elastic body 3 via the rubber portion 33 loaded in each through hole 26.

When manufacturing the upper support described above, in a state where the outer cylinder 2 and the inner cylinder 1 are arranged in the cavity of the molding die, the unvulcanized compounded rubber is injected into the cavity from the injection hole of the molding die. Thus, the unvulcanized compound rubber is injected into the cavity defining the elastic body 3, and the unvulcanized compound rubber is injected into the cavity defining the dust seal 4 through the space of each through hole 26. Then, it is vulcanized. After vulcanization, the tubular portion 20 of the outer tube 2 is drawn to pre-compress the elastic body 3.

In using the upper support, first, the bolt E is inserted into the bolt insertion hole 25, and the bolt E is screwed into the screw hole of the plate-shaped mounting portion B1 of the vehicle body B, so that the upper support is attached to the vehicle body B. To the mounting portion B1 of. As a result, the flange portion 22 is applied to the mounting portion B1 of the vehicle body B. At this time, the dust seal 4 is pinched by the plate-shaped mounting portion B1 of the vehicle body B and the outer cylinder 2, so that the space between the outer cylinder 2 and the mounting portion B1 is sealed and dust and muddy water are prevented from entering. ..

When the upper support is mounted, the bulging portion 27 contacts the mounting portion B1 of the vehicle body B. As a result, the amount of compression of the dust seal 4 in the thickness direction, that is, the degree of tightening is regulated to be constant. As described above, when the upper support is attached to the vehicle body B, since the elastic body 3 and the dust seal 4 are integrally formed via the rubber portion 33 passing through each through hole 26 of the outer cylinder 2, the dust seal 4 is elastic. Always integral with body 3.

Effect As described above, according to the present embodiment, the elastic body 3 and the dust seal 4 are integrally formed via the rubber portion 33 passing through each through hole 26 of the outer cylinder 2, so that the dust seal 4 The elastic body 3 and the elastic body 3 can be integrally formed, which eliminates the risk of the dust seal 4 falling off, which is also advantageous in terms of cost reduction. Further, each through hole 26 can be easily formed by punching in the press forming process of the outer cylinder 2.

Further, in this embodiment, when the upper support is attached to the vehicle body B, strain stress is large in the vicinity of the bolt insertion hole 25 of the outer cylinder 2, so that the through hole 26 is temporarily formed near the bolt insertion hole 25. Then, there is a possibility that cracks or cracks may occur in the outer cylinder 2 near the bolt insertion holes 25. This risk is particularly great when the wall thickness of the outer cylinder 2 is reduced to reduce the weight. In this respect, in this embodiment, as can be understood from FIG. 3, the hole core of the through hole 26 located closest to the bolt insertion hole 25 has a virtual circle B about the axis P2 of the tube portion 20 of the outer tube 2. Since it is set at a position separated from the core of the bolt insertion hole 25 by θ1, that is, 35 degrees, even when the thickness of the outer cylinder 2 is suppressed, the strength of the outer cylinder 2 near the bolt insertion hole 25 is strong. Therefore, it is possible to prevent cracks and breaks in the vicinity of the bolt insertion hole 25.

Further, in the present embodiment, since the dust seal 4 is formed in the boundary area between the tubular portion 20 and the flange portion 22 of the outer cylinder 2, the upper end portion 20a side of the tubular portion 20 of the outer cylinder 2 is drawn. Also, it does not substantially affect the dust seal 4 and does not substantially affect the rubber portion 33 loaded in the through hole 26. Therefore, it is advantageous to prevent the dust seal 4 from peeling and to secure a good sealing property by the dust seal 4.

In addition, in this embodiment, when the upper support is attached to the vehicle body B, the bulging portion 27 of the outer cylinder 2 comes into contact with the attaching portion B1 of the vehicle body B. Therefore, the amount of compression of the dust seal 4 in the thickness direction, that is, The tightening degree of the dust seal 4 is regulated to be constant. Therefore, excessive tightening of the dust seal 4 can be avoided. In addition, in the present embodiment, the following additional effects can be obtained. That is, when the flange portion 22 is attached to the mounting portion B1 of the vehicle body B by mounting, the bolt E inserted into the bolt insertion hole 25 is screwed into the screw hole of the mounting portion B1 of the vehicle body B. Although the vicinity of the bolt insertion hole 25 is pressed against the mounting portion B1 of the vehicle body B, the portion between the bolt insertion holes 25 tends to be separated from the mounting portion B1 of the vehicle body B. Therefore, the degree of tightening of the dust seal 4 between the bolt insertion holes 25 does not increase, which may cause intrusion of muddy water or dust between the bolt insertion holes 25. In this respect, in this embodiment, the bulging portion 27 is located between the bolt insertion holes 25, and since the bulging portion 27 can contact the mounting portion B1 of the vehicle body B, muddy water, dust, etc. Intrusion can be suppressed.

Second Embodiment A second embodiment of the present invention is shown in FIGS. The second embodiment has basically the same configuration as the first embodiment. However, in the second embodiment, the flange portion 22 of the outer cylinder 2 has a substantially triangular onigiri shape, and the downward protruding portion 23 is formed. The flange portion 22 of the outer cylinder 2 is provided with a total of three bolt insertion holes 25 at 120 degree intervals in a virtual circle F centered on the axis P3 of the cylinder portion 20. Further, a plurality of through holes 26 penetrating in the thickness direction of the flange portion 22 of the outer cylinder 2 are formed at predetermined intervals in a virtual circle G centering on the axis P3.

Here, the hole core of the through hole 26 formed at the position closest to the bolt insertion hole 25 has an angle θ 2 or 30 degrees from the hole center of the bolt insertion hole 25 in the virtual circle G centering on the axis P3. It is set at a remote location. Further, as shown in FIG. 6, the inner cylinder 1 is formed of a first inner cylinder 1e and a second inner cylinder 1f. A bearing 19 is provided in the central hole 11 of the inner cylinder 1.

Also in this example, the dust seal 4 is vulcanized and bonded in the boundary region of the outer cylinder 2 between the cylindrical portion 20 and the flange portion 22. As shown in FIG. 5, the dust seal 4 is formed substantially coaxially in a ring shape so as to go around the axis P3 of the outer cylinder 2 once. The dust seal 4 is formed integrally with the elastic body 3 via the rubber portion 33 loaded in each through hole 26.

Also in the second embodiment described above, basically the same operational effects as in the first embodiment can be obtained. That is, since the elastic body 3 and the dust seal 4 are integrally formed through the rubber portion 33 that passes through each of the through holes 26 of the outer cylinder 2, the dust seal 4 and the elastic body 3 can be integrally formed. This eliminates the risk of the dust seal 4 falling off, which is advantageous in terms of cost reduction.

Further, also in this embodiment, the through hole 26 formed at the position closest to the bolt insertion hole 25 is θ1 or 30 from the hole core of the bolt insertion hole 25 in the virtual circle G centering on the axis P3. Since they are formed at positions separated from each other, the strength in the vicinity of the bolt insertion hole 25 of the outer cylinder 2 is secured, and cracks and cracks in the vicinity of the bolt insertion hole 25 can be prevented.

[0028]

[Effect of the device]

 According to the vehicle suspension upper support of the present invention, since the seal portion is integrally formed with the elastic body through the rubber portion loaded in each through hole, it is possible to integrally form the seal portion and the elastic body. This makes it possible to eliminate the risk of the seal coming off, which is advantageous in terms of cost reduction.

Further, according to the vehicle suspension upper support of the present invention, the through hole formed at the position closest to the bolt insertion hole is the bolt insertion hole in a virtual circle centered on the axis of the tube portion of the outer cylinder. Since it is formed at a position 20 degrees or more away from the core of the hole, the strength in the vicinity of the bolt insertion hole of the outer cylinder is secured and cracks and cracks in the vicinity of the bolt insertion hole can be prevented.

Further, since the seal portion is formed in the boundary region between the cylinder portion of the outer cylinder and the flange portion, even if the cylinder portion of the outer cylinder is drawn, the seal portion is not substantially affected, and Also, it does not substantially affect the rubber part filled in the through hole. Therefore, it is advantageous for preventing the peeling of the seal portion and ensuring good sealing performance by the seal portion.

[Brief description of drawings]

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

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

FIG. 3 is a plan view of an outer cylinder.

FIG. 4 is a sectional view taken along line YY of FIG.

FIG. 5 is a plan view of an upper support according to a second embodiment.

FIG. 6 is a sectional view taken along line ZZ in FIG.

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

FIG. 8 is a cross-sectional view of a conventional upper support.

[Explanation of symbols]

In the figure, 1 is an inner cylinder, 2 is an outer cylinder, 20 is a cylindrical portion, 22 is a flange portion, 25 is a bolt insertion hole, 26 is a through hole, 3 is an elastic body,
Reference numeral 33 indicates a rubber portion, and 4 indicates a dust seal.

Claims (1)

[Scope of utility model registration request] 1. An inner cylinder, a cylindrical portion which is arranged on the outer peripheral side of the inner cylinder at a predetermined interval and is drawn, a flange portion which extends radially outward from the cylindrical portion, and the cylindrical portion. An outer cylinder having at least two bolt insertion holes formed in the flange portion at predetermined intervals along an imaginary circle centering on the axis of the vehicle body and through which mounting bolts to be mounted on the vehicle body are inserted; An elastic body made of a rubber material arranged between the outer cylinder and a circumference of an axis of the cylinder provided in a boundary region between the cylinder and the flange on a surface of the outer cylinder facing the vehicle body. And a seal portion made of a rubber material extending in a ring shape in the outer cylinder, and the outer cylinder penetrates in a thickness direction in a region where the seal portion is provided, and has an imaginary line centered on an axis of the cylinder part of the outer cylinder. A plurality of through holes formed at a predetermined interval in a circle The elastic body and the seal portion are integrally formed via a rubber portion passing through each of the through holes, and the hole core of the through hole closest to the bolt insertion hole is the tubular portion of the outer cylinder. An upper support for a vehicle suspension, which is set at a position separated by 20 degrees or more from a hole core of the bolt insertion hole in a virtual circle centered on the axis line of.