JP2001187940A - Vibration-isolating support device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lower the cost and weight of a support bracket, avoid stress concentration on the support bracket, and maintain appreciable vibration-isolating performance by suppressing axial movement of the support bracket relative to a vibration-isolating member. SOLUTION: Fitting portions 33c of a support bracket 33 onto a vibration- isolating member 34 are formed into a plurality of plates that have a plane direction perpendicular to the axis direction of the vibration-isolating member 34 and are parallel interspaced in the axis direction of the vibration-isolating member 34. Fitting holes 33d coaxially punched in the fitting portions 33c house, with a fit, the periphery of the vibration-isolating member 34 (middle cylinder portion 34a). The vibration-isolating member 34 has peripheral flanges 34b at both axial ends. The fitting portions 33c are fitted round the vibration- isolating member 34 so as to just adjoin the peripheral flanges 34b from the inside.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-vibration support device for supporting a supported member such as an exhaust muffler in a vehicle such as a motorcycle with respect to a support member such as a body frame or an engine. .

[0002]

2. Description of the Related Art FIG. 9 shows an example of this type of vibration isolating support device. This anti-vibration support device 100
A vibration-proof member 103 formed of an elastic material into a cylindrical shape is fitted into a fitting hole 102 of a support bracket 101 fixed to a support (a body frame, an engine, or the like). A cylindrical inner collar 105 made of a rigid material is inserted into the hole 104, and a screw member 107 inserted into a center hole 106 of the inner collar 105 is fastened to a supported body (such as an exhaust muffler). Accordingly, the supported body is supported on the support body in a vibration-proof manner.

[0003] Generally, a support bracket 101 is formed by a bracket body 101a press-formed from a sheet metal material or the like.
Then, a separate bracket boss 101b is welded and assembled, and a fixed seat surface 101c provided on the bracket main body 101a is fastened and fixed to a vehicle body, an engine, or the like by another screw member. Since the bracket boss 101b has a certain thickness in the axial direction, the bracket boss 1
01b is in surface contact with the outer peripheral surface of the vibration isolating member 103,
Thereby, the weight of the supported member is dispersed on the outer peripheral surface of the vibration isolating member 103.

[0004]

However, since the support bracket 101 is an assembly of the bracket main body 101a and the bracket boss 101b as described above and has a large number of parts and requires welding work, the support bracket 101 is required. The manufacturing cost of 101 was high. In addition, the weight of the bracket boss 101b is disadvantageous because of its large thickness. Further, there is a concern that stress concentrates on a welded portion between the bracket main body 101a and the bracket boss 101b.

An anti-vibration support device according to the present invention has been invented to solve the above-mentioned problems, and its object is to reduce the cost and weight of the support bracket and reduce the stress concentration on the support bracket. Another object of the present invention is to avoid vibration and suppress relative movement of the support bracket in the axial direction with respect to the vibration isolating member, thereby maintaining good vibration isolating performance.

[0006]

According to a first aspect of the present invention, there is provided an anti-vibration support apparatus according to the present invention, comprising a support bracket provided on one of a support and a supported body. A cylindrical anti-vibration member made of an elastic material is fitted into the fitting hole, and a cylindrical inner collar made of a rigid material is inserted into a center hole of the anti-vibration member. In a vibration-isolation support device in which a supported member is supported in a vibration-proof manner with respect to a support by a screw member inserted into a center hole being fastened to the other of the support or the supported member, The fitting part to the vibration isolating member is formed in a plurality of flat plates having a plane direction perpendicular to the axial direction of the vibration isolating member and spaced apart in the axial direction of the vibration isolating member and parallel to each other. Vibration-proof coaxially drilled fitting holes Characterized in that mounted on an outer periphery of the wood.

According to a second aspect of the present invention, there is provided an anti-vibration support device according to the first aspect, wherein outer peripheral flanges are formed at both axial ends of the anti-vibration member. The plurality of fitting portions of the support bracket were fitted to the vibration isolating member so as to be in contact with the inside immediately.

Further, in the vibration isolating support device according to the present invention, as described in claim 3, in the structure of claim 2, a cylindrical spacer is interposed between the fitting portions of the support bracket.

According to a fourth aspect of the present invention, there is provided an anti-vibration support device according to the first aspect, wherein a plurality of outer peripheral grooves are formed on an outer peripheral surface of the anti-vibration member. The fitting portion of the support bracket was fitted in the groove.

[0010]

According to the first aspect of the present invention, when the vibration isolating support device is configured, the fitting holes of at least two fitting portions provided on the support bracket are separated from each other in the axial direction of the vibration isolating member. Directly fitted to the outer periphery of the vibration isolating member. This allows
By integrating the main body of the support bracket and the fitting portion, it is possible to reduce cost and weight. Moreover, since there is no welded portion in the support bracket, stress concentration can be avoided.

In the vibration isolating support device according to the second aspect of the present invention, the fitting portion of the support bracket can be moved in the axial direction of the vibration isolating member by the outer peripheral flanges formed at both ends in the axial direction of the vibration isolating member. The relative movement to the outside is suppressed, and the support bracket is placed at a fixed position with respect to the vibration isolating member, so that good vibration isolating performance is maintained.

Further, according to the third and fourth aspects of the present invention, when the vibration isolating support device is configured, the interval between the plurality of fitting portions of the support bracket is fixed, so that the fitting portion is connected to the shaft of the vibration isolating member. The relative movement to the outside and the inside in the direction is suppressed, and the vibration proof performance is further better maintained.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a left side view showing an example of a motorcycle in which the vibration isolation support device according to the present invention is applied to an exhaust muffler.

The body frame 2 of the motorcycle 1 includes:
A front fork 4 supporting the front wheel 3 on its frontal head,
A power unit 11 is supported by a handlebar 5, lamps 6, a front fender 7, and the like so as to be rotatable left and right. Are connected so as to be vertically swingable, a rear wheel 12 is pivotally supported at the rear end of the power unit 11, and a shock absorber 13 is connected between the rear unit 12 and the rear portion of the vehicle body frame 2. In addition, a fuel tank 14 is installed at a front upper portion of the body frame 2, and a seat 15 and a rear fender 16 are installed so as to be connected to the rear.

The power unit 11 is a small engine 1
8 and a unit case 19 accommodating a V-belt type continuously variable transmission, a deceleration transmission device, and the like. The intake device 20 and the exhaust muffler 21 are connected to the engine 18. . Unit case 1
A stand device 22 is provided at the bottom of 9.

As shown in FIGS. 2 and 3, the exhaust muffler 21 has a thin exhaust pipe 25 extending downward from an exhaust port 24 on the lower surface of the engine 18 and is curved forward to be connected to an expansion pipe 26 having a large diameter. The expansion pipe 26 has a configuration in which a narrow joint pipe 27 extends rearward from the rear end of the expansion pipe 26, and a silencer 28 is connected to the rear end of the joint pipe 27.

For example, an anti-vibration support device 30 according to the present invention is provided near the connection between the expansion pipe 26 and the joint pipe 27, and the exhaust muffler 21 is provided by the anti-vibration support device 30.
Is an engine 18 of the power unit 11, for example.
The muffler stay 31 is supported by the engine 18 (crankcase) by a muffler stay 31 that is supported by the (crankcase) in a vibration-proof manner and extends downward from the muffler 28. For this reason, the exhaust muffler 21 is connected to the power unit 11 and the rear wheel 12.
Swings together with the like.

FIGS. 4 and 5 show the anti-vibration support device 30 respectively.
4 shows a first embodiment of the present invention, and FIG.
FIG. 5 is a longitudinal sectional view of the anti-vibration support device 30 along the line VV in FIG.

The anti-vibration support device 30 includes a support bracket 33.
, An anti-vibration member 34, an inner collar 35, and a screw member 36.

The support bracket 33 is formed by joining (welding) back-to-back bracket halves 33a and 33b made of, for example, a sheet metal press, and has a pair of left and right flat plate-like fitting portions 33c at its front end. ing. The pair of fitting portions 33c are provided on the center plane C of the motorcycle 1 (see FIG. 3).
Parallel to each other along with the fitting holes 33d
Are coaxially drilled. Also, the support bracket 33
A pair of left and right fixed seating surfaces 33e extending outward in the vehicle width direction is provided at the lowermost portion of the vehicle, and a section between these fixed seating surfaces 33e and the fitting portion 33c has a shape bent substantially at a right angle in side view. Then, an embossed portion (convex portion) 33f for improving rigidity is press-formed.

The vibration isolating member 34 is formed of an elastic material such as rubber into a cylindrical shape. A flange-shaped outer peripheral flange 34b is provided at both axial ends of the intermediate cylindrical portion 34a. A central hole 34 along the central axis of 34a
c is formed. The outer diameter of the intermediate cylindrical portion 34a is equal to the inner diameter of the fitting hole 33d of the support bracket 33, and the inner dimension between the two outer peripheral flanges 34b is
Of the two fitting portions 33c.

Further, the inner collar 35 is formed in a cylindrical shape from a rigid material such as steel or another metal, and a flange-shaped outer peripheral flange 35b is provided at one axial end of the cylindrical portion 35a. A central hole 35c is formed along the axis. The length of the cylindrical portion 35a is equal to the entire length (entire width) of the vibration isolator 34, and the outer diameter of the outer peripheral flange 35b is substantially the same as the outer diameter of the outer peripheral flange 34b of the vibration isolator 34.

The screw member 36 includes a bolt 36
The head 36 has a washer 36b mounted on its head side, and the outer diameter of the bolt 36a is set to a size that allows it to be smoothly inserted into the center hole 35c of the inner collar 35 without any gap. The outer diameter of the washer 36b is The outer diameter of the outer peripheral flange 34b of the vibration isolator 34 is set to be substantially the same as the outer diameter.

On the other hand, a support stay 37 made of a sheet metal press is fixed near the connection between the expansion pipe 26 and the joint pipe 27 of the exhaust muffler 21 which is a supported body. As shown in FIG. 5, the support stay 37 has a substantially “U” -shaped cross section that opens to the right in the vehicle width direction.
A nut 37c is fixed to the right side so as to align with the through hole 37b formed in a.

The fixed seat surface 3 of the support bracket 33
3e is fastened and fixed to the upper surface of the engine 18 (crankcase) as a support using a screw member (not shown), and a vibration isolating member 34 is inserted into a fitting hole 33d of the support bracket 33.
Is inserted into the center hole 3 of the vibration isolating member 34.
The cylindrical portion 35a of the inner collar 35 is inserted into 4c from the right side in the vehicle width direction.

Further, the center hole 35 of the inner collar 35 is provided.
c, the screw member 36 is inserted from the left side in the vehicle width direction,
The screw member 36 is a support stay 3 for the exhaust muffler 21.
7 (through hole 37b) and fastened to the nut 37c. Here, since the length of the cylindrical portion 35a of the inner collar 35 is equal to the entire length (full width) of the vibration isolator 34, the fastening force of the screw member 36 is applied only to the inner collar 35 and does not reach the vibration isolator 34. The vibration isolating member 34 is not crushed.

Two fitting portions 33c of the support bracket 33
The surface directions are orthogonal to the axial direction of the vibration isolating member 34, are separated from each other in the axial direction of the vibration isolating member 34, and come into contact with the two outer peripheral flanges 34 b of the vibration isolating member 34, respectively. As a result, the exhaust muffler 21 as a supported member is
It is supported in a vibration-proof manner with respect to the engine 18 as a support via the vibration-proof member 34, and its movement in the front-rear direction, the vertical direction, and the vehicle width direction is restricted.

In the anti-vibration support device 30, a plurality of flat fitting portions 33c (fitting holes 33d) provided on the support bracket 33 are directly fitted into the intermediate cylindrical portion 34a of the vibration isolating member 34. Due to the structure, the fitting portion 33c can be integrated with the other portion of the support bracket 33, and it is necessary to form the fitting portion separately as a boss and weld it to the support bracket as in the related art. Absent. Therefore, as in the present embodiment, the support bracket 33 is formed as an integrated press-formed product from a flat plate material, so that the cost and weight of the support bracket 33 can be reduced.

Moreover, since the support bracket 33 formed only of the sheet metal material has no welded portions other than the joining portions of the bracket half bodies 33a and 33b, which are constituent members thereof, stress concentration can be effectively avoided. Or
The amount of bending of the support bracket 33 can be increased as compared with the related art, so that vibration isolation can be further improved.

The fitting portion 33c of the support bracket 33
Has a structure in contact with the outer peripheral flange 34b of the vibration isolating member 34, so that the fitting portion 33c is relatively prevented from moving axially outward of the vibration isolating member 34, thereby supporting the vibration isolating member 34. By placing the bracket 33 in a fixed position, it is possible to maintain good vibration isolation performance.

FIG. 6 shows a second embodiment of an anti-vibration support device. In the anti-vibration support device 40, between the fitting portions 33c (the fitting holes 33d) of the support bracket 33,
A cylindrical spacer 41 made of a rigid material (such as steel) is provided so as to be densely interposed. The configuration of the other parts is the same as that of the first embodiment shown in FIG.

FIG. 7 shows a third embodiment of an anti-vibration support device. In the anti-vibration support device 42, the anti-vibration member 3
A plurality of outer circumferential grooves 34d are formed on the outer circumferential surface of No. 4, and fitting portions 33c (fitting holes 33d) of the support bracket 33 are closely fitted in these outer circumferential grooves 34d.

According to the second and third embodiments, the distance between the two fitting portions 33c is fixed.
The relative movement of the fitting portion 33c to the outside and inside in the axial direction of the vibration isolation member 34 can be effectively suppressed, and the vibration isolation performance can be further improved.

FIG. 8 shows a fourth embodiment of an anti-vibration support device. In this anti-vibration support device 43, the outer diameter of the intermediate cylindrical portion 34e between the outer peripheral grooves 34d provided on the outer peripheral surface of the anti-vibration member 34 is made smaller than the outer diameter of the outer peripheral flange 34b. The shape of the cylindrical portion 34e is substantially a drum shape. By doing so, the support bracket 33
It is easy to fit the outer circumferential groove 34d of the vibration isolating member 34 into the fitting portion 33c (fitting hole 33d), and the assembling workability is improved.

As another modified example, the bracket half bodies 33a and 33b are integrated into a single fitting portion, and a fitting hole is formed in the fitting portion by drawing, and the fitting hole is formed into a short cylindrical shape. It is also conceivable that it is formed and fitted to the intermediate cylindrical portion 34a of the vibration isolating member 34.

In the above embodiment, the anti-vibration support device 3
0 (40, 42, 43) support bracket 33 is fixed to the engine 18 side as a support, and a screw member 36
Is fixed to the support stay 37 of the exhaust muffler 21 as the supported member, but the relationship between the supported member and the supported member may be reversed. That is, the support bracket 33 is fixed to the exhaust muffler 21 side, and the support bracket 33 is connected to the screw member 3 via the vibration isolating member 34 and the inner collar 35.
6 may be fastened to the engine 18 (crankcase).

In the above-described embodiment, an example has been described in which the motorcycle engine is used as a support, the exhaust muffler is used as a supported member, and the anti-vibration support device according to the present invention is applied between the engine and the exhaust muffler. However, not only in the engine and exhaust muffler of a motorcycle, but also in other vehicles, machines, structures, and the like, a vibration-proof support device according to the present invention for supporting a specific article on a support in a vibration-proof manner. Can be applied.

[0038]

As described above, according to the anti-vibration support device of the present invention, the cost and weight of the support bracket can be reduced, and stress concentration on the support bracket can be avoided. In this way, it is possible to suppress the relative movement of the support bracket in the axial direction with respect to, so that the vibration isolating performance can be kept good.

[Brief description of the drawings]

FIG. 1 is a left side view showing an example of a motorcycle in which an anti-vibration support device according to the present invention is applied to an exhaust muffler.

FIG. 2 is a left side view of an exhaust muffler and an anti-vibration support device.

FIG. 3 is a plan view of an exhaust muffler and an anti-vibration support device.

FIG. 4 is an exploded perspective view of the vibration isolation support device.

FIG. 5 is a view showing the first embodiment of the anti-vibration support device according to a vertical section taken along line VV of FIG. 2;

FIG. 6 is a longitudinal sectional view showing a second embodiment of a vibration-proof supporting device.

FIG. 7 is a longitudinal sectional view showing a third embodiment of a vibration-proof supporting device.

FIG. 8 is a longitudinal sectional view showing a fourth embodiment of a vibration-proof supporting device.

FIG. 9 is an exploded perspective view of an anti-vibration support device showing a conventional technique.

[Explanation of symbols]

 18 Engine as a support 21 Exhaust muffler as a supported body 30 Vibration-proof support device 33 Support bracket 33c Fitting part 33d Fitting hole 34 Vibration-proof member 34b Outer flange 34c Center hole 34d Outer groove 35 Inner collar 35c Center hole 36 Screw member 41 Spacer

Claims (4)

[Claims] An anti-vibration member formed of an elastic material into a cylindrical shape is fitted into a fitting hole of a support bracket provided on one of a support and a supported body. An inner collar formed into a tubular shape by a rigid material is inserted, and a screw member inserted into a center hole of the inner collar is fastened to the other of the support and the support, whereby the support is supported. In the vibration isolating support device supported in a vibration isolating manner with respect to the support bracket 33,
The fitting portion 33c of the vibration isolating member 34
Are formed in a plurality of flat plates having a plane direction perpendicular to the axial direction of the vibration isolating member 34 and spaced apart in the axial direction of the vibration isolating member 34, and coaxially formed in these fitting portions 33c.
An anti-vibration support device, wherein 3d is fitted on the outer periphery of the anti-vibration member. 2. An outer peripheral flange 34b is formed at both ends in the axial direction of the vibration isolator 34, and the plurality of fitting portions 33c of the support bracket 33 are brought into contact with the inner side of the outer peripheral flange 34b. The anti-vibration support device according to claim 1, which is fitted to the support. 3. A fitting portion 33c of the support bracket 33.
The anti-vibration support device according to claim 2, wherein a cylindrical spacer (41) is interposed therebetween. 4. An anti-vibration device according to claim 1, wherein a plurality of outer peripheral grooves are formed on an outer peripheral surface of said anti-vibration member, and a fitting portion of said support bracket is fitted into said outer peripheral grooves. Support device.