JP7150566B2 - Anti-vibration support structure - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-vibration support structure for use in cantilevering and anti-vibration support of a support mounted on a vehicle from the frame side.

Conventionally, in large vehicles such as buses and trucks, a pneumatically responsive actuator that uses compressed air as a working medium presses a friction member such as a brake shoe against a brake drum fixed to the wheel to generate a braking force. is widely used, but in recent years, an electronically controlled air brake device that has improved brake response and brake feeling by adding an electric signal system to the air brake device has come to be used. An electric signal is sent from the control unit to the axle modulators installed on the side and the rear wheels, respectively, and compressed air is supplied from the axle modulator at the air pressure indicated by the electric signal to appropriately control the operation of the brake. I'm trying

Until now, the sound emitted from the valve of the axle modulator had not become a problem for the passengers because it was mixed with the sound of the engine. In recent years, when tall and large vehicles are being put to practical use, it is becoming necessary to support the axle modulator via anti-vibration rubber for soundproofing.

As shown in FIG. 4, this type of axle modulator a generally has a fastening portion on only one side surface, so that it is supported by a cantilever from the frame b side. When applying the anti-vibration rubbers c and d to the holding support structure, a pair of brackets e and f having L-shaped side cross sections of two types long and short are used, and the flanges g and h of the brackets e and f are attached to each other. The web ends i and j of the brackets e and f are stacked horizontally and connected via a lateral vibration isolator c. .

Here, to fix the bracket e to the axle modulator a, a stud bolt k projecting from one side surface of the axle modulator a is passed through a bolt hole m in the web base l of the bracket e and fastened with a nut n. The bracket f is fixed to the frame b by fastening the web base o of the bracket f to an appropriate position on the frame b via a fastener or the like (not shown).

Prior art document information related to this type of axle modulator includes the following Patent Document 1 and the like.

Japanese Patent Application Laid-Open No. 2008-230501

However, in the conventional structure as shown in FIG. 4 as described above, although a good soundproofing effect can be obtained by the vibrationproofing performance of the vibrationproof rubbers c and d, the axle modulator a is supported by a cantilever for soundproofing. Therefore, a moment is likely to be generated in the axle modulator a by the input of running vibration in the vertical direction. As a result, a strong tensile force acts on the sideways anti-vibration rubber c to apply a large load, and there is a concern that the durability will be adversely affected.

That is, the conventional anti-vibration rubbers c and d are designed to absorb vertical running vibration simply by shear displacement of the anti-vibration rubber c and compression displacement of the anti-vibration rubber d. Since the stud bolts p and q are fastened and connected to the flanges g and h of the brackets e and f and the web ends i and j with the nuts r and s, a moment is generated in the axle modulator a. If the distance between the flanges g, h and the web ends i, j is increased, a strong tensile force acts on the anti-vibration rubbers c, d.

Moreover, since the vertically oriented rubber vibration isolator d and the laterally oriented vibration isolator c are used together, it is difficult to assemble them. As a result, the production cost has soared.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an anti-vibration support structure which is more durable and easier to assemble than conventional structures, and which can be manufactured at a significantly reduced cost.

The present invention provides a vibration-isolating support structure in which a support mounted on a vehicle is supported by a cantilever from the frame side in a vibration-isolating manner. a first bracket having a channel-shaped integral side section that opens to the outside; and a second bracket fixed to the frame side and having a channel-shaped integral side section facing the first bracket, The first bracket and the second bracket are opposed to each other on different levels, and the mutual upper flanges and the lower flanges are stacked vertically, and one of each pair of the upper flanges and the lower flanges is a pair of anti-vibration It is characterized in that the pair of the upper flanges and the lower flanges are vertically penetrated and fastened together with the respective anti-vibration rubbers by sandwiching them from above and below with rubbers.

By doing so, the vertical fastening between the upper flanges and the lower flanges of the first bracket on the support side and the second bracket on the frame side can be performed by a pair of vertically divided vibration dampers. Since the force is applied via the rubber, even if a moment is generated in the support due to running vibration, the force is always applied only in the direction of compression to the pair of anti-vibration rubbers, and a tensile force is applied to each of the anti-vibration rubbers. will no longer cause an event that causes a large load.

That is, when a moment is generated in the support, the upper and lower flanges sandwiched between the pair of anti-vibration rubbers from above and below tilt relative to each other like a seesaw with the points sandwiched by the anti-vibration rubbers as the base point. However, while the opposite sides of the upper and lower vibration-isolating rubbers alternately receive compressive force, tensile force does not act on any of the upper and lower vibration-isolating rubbers.

In addition, when the support is cantilevered and supported from the frame side, it is not necessary to use both vertical and horizontal anti-vibration rubbers. The upper and lower flanges of the bracket can be satisfactorily assembled simply by fastening them in the same vertical direction via a pair of upper and lower anti-vibration rubbers.

For the first bracket on the support side and the second bracket on the frame side, general-purpose channel material can be used. It is possible to significantly reduce the manufacturing cost.

Further, in carrying out the present invention in a more specific manner, one of the pair of vibration-isolating rubbers is formed with a fitting convex portion projecting toward the other vibration-isolating rubber at the axial center thereof. A fitting recess for receiving the mating projection is formed in the axial center of the other anti-vibration rubber. preferably.

In this way, the fitting convex portion of one vibration isolating rubber is fitted into the fitting concave portion of the other vibration isolating rubber, and the collar is vertically attached to the axial center of each of the fitting convex portion and the fitting concave portion. It is possible to easily position the upper and lower anti-vibration rubbers by penetrating from the upper and lower rubbers and quickly fasten them with the fastener.

Further, in the present invention, it is preferable that the vehicle is a fuel cell bus, and that the support mounted on the vehicle is an axle modulator. , the noise emitted from the valve of the axle modulator can be effectively suppressed by the anti-vibration rubber.

According to the anti-vibration support structure of the present invention described above, the following various excellent effects can be obtained.

(I) According to the invention of claim 1 of the present invention, even if a moment is generated in the support due to running vibration of the vehicle, a large load due to the action of tensile force is not applied to each anti-vibration rubber. The durability can be greatly improved, and the upper and lower flanges of the first bracket on the support side and the second bracket on the frame side are arranged in the same vertical direction via a pair of upper and lower anti-vibration rubbers. It can be assembled well just by tightening, and it is possible to greatly improve the ease of assembly.In addition, general-purpose channel materials are used for the first bracket on the support side and the second bracket on the frame side. , or can be formed into a simple channel shape and manufactured at low cost, so that the manufacturing cost can be greatly reduced.

(II) According to the invention of claim 2 of the present invention, the fitting convex portion of one vibration isolator is fitted into the fitting concave portion of the other vibration isolating rubber, and the fitting convex portion and the fitting concave portion are fitted. The upper and lower anti-vibration rubbers can be easily positioned and quickly fastened with fasteners by penetrating the collar vertically through each of the shaft centers, further improving the ease of assembly. can.

(III) According to the invention of claim 3 of the present invention, in a highly quiet fuel cell bus that does not have an engine, the noise emitted from the valve of the axle modulator can be effectively suppressed by the anti-vibration rubber. can.

BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic which shows an example of the form which implements this invention. 2 is a cross-sectional view showing details of a pair of anti-vibration rubbers in FIG. 1; FIG. FIG. 2 is an exploded view of each anti-vibration rubber, bolt, nut, and collar in FIG. 1 ; It is a schematic diagram showing a conventional example.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows an example of an embodiment of the present invention, in which an axle modulator 2 (support) mounted on a fuel cell bus 1 (vehicle) is cantilevered from the frame 3 side for vibration isolation. a first bracket 4 fixed to one side surface of the axle modulator 2 and having a channel-shaped integral side cross section that opens in a direction away from the side surface; and the first bracket fixed to the frame 3 side. 4 and a second bracket 5 having an integral side section forming opposing channels.

The first bracket 4 and the second bracket 5 are opposed to each other on different levels, and the mutual upper flanges 4a, 5a and the lower flanges 4b, 5b are overlapped in the vertical direction. Each of the flange 4a and the lower flange 4b is sandwiched by a pair of vibration isolating rubbers 6, 7 from above and below, and the upper flanges 4a, 5a of the first bracket 4 and the second bracket 5 are held together by the respective vibration isolating rubbers 6, 7. and the lower flanges 4b and 5b are vertically penetrated and fastened by fasteners consisting of bolts 8 and nuts 9. As shown in FIG.

To fix the first bracket 4 to the axle modulator 2, a stud bolt 10 projecting from one side surface of the axle modulator 2 is passed through a bolt hole 11 in the web 4c of the first bracket 4 and fastened with a nut 12. The fixing of the second bracket 5 to the frame 3 side is performed by fastening the web 4c of the first bracket 4 to an appropriate position of the frame 3 via fasteners (not shown). , it is of course possible to adopt a fixed form other than these.

Here, the first bracket 4 and the second bracket 5 only need to have a channel-shaped portion as a basic structure. For the purpose of supporting them together, or for the purpose of fastening the second bracket 5 to the horizontal portion of the frame 3 side or the like, the lower flange 5b may be appropriately extended.

Further, as shown in detail in FIG. 2, one of the pair of vibration-isolating rubbers 6, 7 (the upper vibration-isolating rubber 6 in the figure) is attached to the shaft center of the other vibration-isolating rubber 7 (the upper one in the figure). Then, a fitting projection 6a projecting toward the lower rubber vibration isolator 7) is formed, and a fitting recess 7a for receiving the fitting projection 6a is formed in the axial center portion of the other vibration isolation rubber 7, As shown in the exploded view of FIG. 3, a collar 13 is provided which vertically penetrates through the axial center portions of the fitting convex portion 6a and the fitting concave portion 7a.

In the example shown here, the upper flange 4a and the lower flange 4b of the first bracket 4 are sandwiched between the pair of anti-vibration rubbers 6 and 7 from above and below. The flange 5a and the lower flange 5b may be sandwiched between a pair of anti-vibration rubbers 6 and 7 from above and below. The top and bottom may be reversed.

By constructing the anti-vibration support structure in this manner, the upper flanges 4a, 5a and the lower flanges 4b, 5b of the first bracket 4 on the axle modulator 2 side and the second bracket 5 on the frame 3 side are separated from each other. Since the fastening in the vertical direction is performed through the pair of rubber vibration insulators 6 and 7 divided into two parts, even if a moment is generated in the axle modulator 2 due to running vibration, the pair of rubber vibration insulators A force is always applied to the rubber vibration insulators 6 and 7 only in the direction of compression, and a phenomenon in which a tensile force acts on the rubber vibration isolators 6 and 7 to apply a large load does not occur.

That is, as shown in FIG. 1, when a moment is generated in the axle modulator 2, the upper flange 4a and the lower flange 4b of the first bracket 4 sandwiched from above and below by the pair of anti-vibration rubbers 6, 7 will move to the above-mentioned respective It is relatively tilted like a seesaw with the point held by the rubber vibration insulators 6 and 7 as a base point, and the opposing sides of the rubber vibration insulators 6 and 7 alternately receive compressive force. No tensile force acts on any of

In addition, when the axle modulator 2 is cantilevered from the frame 3 side to support the vibration isolation, it is not necessary to use the vertical vibration isolation rubber and the horizontal vibration isolation rubber together. The upper and lower flanges 4a and 5a and the lower flanges 4b and 5b of the second bracket 5 on the 3 side can be satisfactorily assembled simply by fastening them in the same vertical direction via a pair of upper and lower anti-vibration rubbers 6 and 7. .

For the first bracket 4 on the axle modulator 2 side and the second bracket 5 on the frame 3 side, it is possible to use a general-purpose channel material. It is possible to significantly reduce the manufacturing cost by simply forming the grooves on the substrate.

Therefore, according to the above-described embodiment, even if a moment is generated in the axle modulator 2 due to vehicle running vibration, a large load due to the action of tensile force is not applied to the respective anti-vibration rubbers 6 and 7, thereby greatly increasing durability. In addition, the upper and lower flanges 4a and 5a and the lower flanges 4b and 5b of the first bracket 4 on the axle modulator 2 side and the second bracket 5 on the frame 3 side are replaced by a pair of upper and lower anti-vibration rubbers. 6 and 7 can be fastened in the same vertical direction so that they can be assembled satisfactorily. The second bracket 5 can be made of a general-purpose channel material, or can be formed into a simple channel shape and manufactured at a low cost, so that the manufacturing cost can be greatly reduced.

In addition, particularly in this embodiment, the fitting convex portion 6a of one vibration isolator 6 is fitted into the fitting concave portion 7a of the other vibration isolating rubber 7, and these fitting convex portion 6a and the fitting concave portion 7a are fitted together. The upper and lower anti-vibration rubbers 6 and 7 can be easily positioned and quickly fastened with the bolts 8 and nuts 9 by penetrating the collar 13 vertically through each of the axial centers of the Further improvement can be achieved.

Furthermore, when the axle modulator 2 mounted on the fuel cell bus 1 is supported from the side of the frame 3 by a cantilever for vibration isolation, as in the present embodiment, in the fuel cell bus 1, which is not equipped with an engine and is highly quiet, It is extremely preferable that the noise emitted from the valves of the axle modulator 2 can be effectively suppressed by the rubber vibration insulators 6 and 7 .

It should be noted that the anti-vibration support structure of the present invention is not limited to the above-described embodiments, and the vehicle may be other than a fuel cell bus, and the support is not necessarily limited to an axle modulator. Of course, various modifications can be made without departing from the gist of the present invention.

1 Fuel cell bus (vehicle)
2 Axle modulator (support)
3 Frame 4 First bracket 4a Upper flange 4b Lower flange 5 Second bracket 5a Upper flange 5b Lower flange 6 Anti-vibration rubber 6a Fitting protrusion 7 Anti-vibration rubber 7a Fitting recess 8 Bolt (fastener)
9 nut (fastener)
13 colors

Claims (3)

A vibration-isolating support structure in which a support mounted on a vehicle is cantilevered from the frame side for vibration-isolating support, and is fixed to one side surface of the support and has a channel shape that opens in a direction away from the side surface. and a second bracket fixed to the frame side and having an integral side section forming a channel shape facing the first bracket, the first bracket and the second bracket are arranged to face each other at different levels, and the mutual upper flanges and lower flanges are stacked vertically, and one of each pair of the upper flanges and the lower flanges is vertically supported by a pair of anti-vibration rubbers. A vibration isolation support structure, wherein each pair of said upper flanges and said lower flanges are vertically penetrated and fastened with fasteners together with said vibration isolation rubbers. One of the pair of rubber isolators has an axial center portion formed with a fitting projection projecting toward the other rubber isolator. 2. The protective device according to claim 1, further comprising a collar which is formed at the axial center of the fitting projection and which vertically penetrates the respective axial center of the fitting projection and the fitting recess. Swing support structure. 3. The anti-vibration support structure according to claim 1, wherein the vehicle is a fuel cell bus and the support mounted on the vehicle is an axle modulator.

Images