JP2580158Y2 - Air cleaner support device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for supporting an air cleaner for an automobile, for example.

[0002]

2. Description of the Related Art As shown in FIG. 10, for example, an automobile air cleaner 106 is supported on a vehicle body by a support device 102 having an elastic body 118, and an engine 12 is provided.
Anti-vibration is applied so that the vibration generated by 8 is hardly transmitted to the body side.

[0003] Specifically, the supporting device 102 is provided with a filter medium 10.
4 of the air cleaner 106 accommodating the inside 4
08 and a bracket 112 on the vehicle body side facing the bottom wall 110. This support device 10
In FIG. 2, as shown in FIG. 11, a cylindrical elastic body 118 is provided on the outer peripheral surface of a collar 116 having a flange 114 at one end.
Are fitted. The axial direction of the elastic body 118 is defined as one direction (Z direction) which is the direction in which the casing bottom wall 110 and the bracket 112 are opposed to each other, and the bolt 120 passes through the inside of the collar 116 from one end of the flange 114 side. 112, and the penetrating tip is fastened to the nut 122. The elastic body 11 is provided on the outer peripheral surface of the elastic body 118.
8, a receiving circumferential groove 124 is formed at an axially intermediate portion, and a peripheral edge of an opening 126 formed in the casing bottom wall 110 is fitted into the receiving circumferential groove 124.

On the other hand, as another known example, as shown in FIG. 12, a supporting device 136 in which a hollow peripheral groove 134 is formed between the receiving peripheral groove 124 and each end of the elastic body 132 in the axial direction.
(See Japanese Utility Model Application Laid-Open No. 57-42159), and as shown in FIG.
42, and a support device 144 for elastically deforming the convex protrusion 142 when tightened with a bolt and nut.
No. 86356).

[0005] Further, as shown in FIG.
And a pair of plate-shaped L members 154 each including a horizontal piece 152.
However, the horizontal pieces 152 are respectively fixed to the air filter side and the body side with bolts 120A and nuts 122A so as to be opposed to each other.
The supporting device 158 (elastic 4-
No. 1376).

[0006]

By the way, in the above-described conventional air cleaner support device, in which the support device 102 in which only the receiving circumferential groove 124 is formed in the elastic member 118, the vibration acting on the elastic member 118 in the axial direction, In addition, the vibration acting in the radial direction of the elastic body 118 or the direction perpendicular to the axial direction exerts a compressive force on the elastic body 118, so that a so-called compression type vibration damping is performed. This support device 102 is most commonly used because of its low cost. However, when the spring constant of the elastic body 118 is reduced to improve the vibration isolation performance, the amount of deformation of the elastic body 118 increases, and the durability decreases. Problems arise.

A support device 136 (shown in FIG. 12) in which a hollow circumferential groove 134 is formed in the elastic body 132 is also provided.
Support device 14 provided with a convex protrusion 142 on the axial end surface thereof
4 (shown in FIG. 13) are intended for compression-type vibration damping, and are aimed at lowering the spring constant in the axial direction (Z direction) by devising the shape of the elastic body. According to these, the effect of lowering the spring constant can be seen in the axial direction, but the vibration in the direction (X, Y directions) orthogonal to the axial direction or the radial direction of the elastic body is the same as that of the above-described support device 102. In addition, it has been difficult to enhance the vibration isolation performance without deteriorating the durability of the elastic body.

On the other hand, a supporting device 15 having an L member 154
8, the opposite direction (Z direction) of the horizontal piece 152 and the vertical piece 1
Vibrations acting in two directions orthogonal to each other with the 50 opposing directions (X direction) exert a shearing force on the elastic body 156. When vibrations act in those directions, so-called shear-type vibration isolation is performed. Compared with compression-type vibration isolation, it is possible to greatly reduce the spring constant without changing the material.

However, when the vibration acts in a direction different from those directions, that is, when the vibration
When it acts in a direction (front-back direction on the paper) orthogonal to both the opposing direction (Z direction) and the opposing direction (X direction) of the vertical piece 154, a compressive force is exerted on the elastic body 156. Therefore, a compression type vibration damping action is performed for the vibration in that direction, and a significant reduction in the spring constant in that direction cannot be expected, and it is difficult to obtain sufficient vibration damping performance.

[0010] Therefore, there is a need for an improvement for obtaining sufficient vibration-proof performance without lowering the durability even for three-dimensional vibration.

Further, the supporting device 15 having the L member 154
In No. 8, each L member 154 needs to be fixed to the air cleaner side and the body side with bolts and nuts, respectively, and the number of parts is large and assembly is troublesome.

In the above-mentioned improvement, it is necessary to take care not to cause such deterioration of the assemblability, to prevent the deterioration of the mountability, and to prevent the cost from increasing.

In consideration of the above facts, the present invention secures both high vibration proof performance against three-dimensional vibration and sufficient durability, and is a low-cost air cleaner with good assembling and mounting properties. It is an object to provide a supporting device.

[0014]

According to the present invention, there is provided a support device for supporting an air cleaner through an elastic body, wherein the outer peripheral surface of an intermediate portion of the elastic body has a circumferential direction. Two annular projections projecting outward or two groups of projections arranged in a ring are provided separately from each other to form a receiving recess for receiving the supported portion of the air cleaner. The inner diameter of the portion forming the bottom of the receiving concave portion sandwiched between the two annular convex portions or the two groups of convex portions is made larger than the internal diameter of the other portion, and the portion of the cylindrical main body having the larger inner diameter is free. The present invention proposes an air cleaner support device having an end face or an annular groove.

[0015]

According to the air cleaner supporting device of the present invention, the vibration acting in the axial direction of the supporting device extends from the supported portion of the air cleaner to the convex portion or the convex portion group provided on the elastic body, and thereby the convex portion is formed. The portions or groups of protrusions are elastically deformed in an axial manner along the axial direction of the support device, and the elastic body receives shearing force. Also, a direction orthogonal to the axial direction of the support device,
Further, the vibration acting radially with respect to the axis of the support device reaches the bottom of the receiving recess through the supported portion of the air cleaner, and the bottom of the receiving recess, that is, the inner diameter of the cylindrical main body is increased. Since the portion elastically deforms in a direction orthogonal to the axial direction of the support device, the elastic body receives a shearing force.

Therefore, the shearing type vibration damping action can be performed in the axial direction of the support device, in the direction orthogonal to the axial direction, and in the direction orthogonal to both directions, that is, in the three-dimensional direction. High vibration damping performance can be obtained with respect to vibration generated in a dimensional direction. In order to use a shear-type vibration damping action with excellent vibration damping performance, a soft material having a small spring constant does not have to be used as a material of the elastic body in order to obtain high vibration damping performance. The deformation amount is suppressed, and sufficient durability of the elastic body and the support device is secured.

Further, the number of components in the entire supporting device is reduced, the structure is simplified, the cost is reduced, and good assembling and mounting properties can be obtained.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of an air cleaner supporting device according to the present invention will be described with reference to FIGS.

In the air cleaner 10 according to the present embodiment, the casing 12 is divided into two parts.
Reference numerals 4 and 16 are arranged on the downstream side and the upstream side in the air flow direction, respectively, and a filter medium 18 is sandwiched between the opposed end connection portions.

The upstream split casing 16 is open to the atmosphere, and the downstream split casing 14 is connected to an engine 22 of the automobile via an intake duct 20.

A bracket 26 is provided on the vehicle body so as to face the bottom wall 24 (constituting the portion to be supported) of the upstream split casing 16, and the bracket 26 is connected to the bottom wall 24 of the upstream split casing 16. In between, for example, at three locations, the support devices 28 according to the present embodiment are provided.

As shown in FIG. 2 and FIG.
Has a cylindrical collar 30, and the collar 30 is formed on the bottom wall 24 of the upstream split casing 16 with the direction of contact and separation between the upstream split casing 16 and the bracket 26 as the axial direction (Z direction). A flange 34 is formed integrally with one end of the collar 30 that is inserted through the hole 32 and is located inside the upstream split casing 16. The other end protruding outside the upstream split casing 16 is in contact with the bracket 26. A bolt 36 is inserted into the collar 30 from one end on the side of the flange 34, a tip of the bolt 36 penetrates the bracket 26, and a nut 38 is screwed into a tip of the bolt 36 (see FIG. 1). ).

The collar 30 has two axially facing
Elastic bodies 40 and 42 are provided. Each elastic body 40, 4
2 has an inner peripheral surface fitted into the outer peripheral surface of the collar 30 and has a cylindrical portion 44 forming a cylindrical main body. At the opposite end of the portion 44, an annular convex portion 46 is formed outwardly of the outer peripheral surface.
Are formed to protrude. The biconvex portions 46 are elastic members 40, 4
2, an annular receiving recess 47 is formed coaxially with the collar 30 between the two convex portions 46, and the receiving recess 47 is provided with the bottom wall 24 of the upstream split casing 16 in the receiving recess 47. The periphery of the opening 32 is interposed.

Also, the protrusion 46 formed protruding from the elastic body 40 (coaxially with the collar 30) on the distal end flange 34 side (upper side in FIG. 2) and from the elastic body 42 (coaxially with the collar 30). Tip bracket 2 of projecting projection 46
The 6 side (the lower side in FIG. 2) bulges toward the flange 34 and the bracket 26, respectively, and an annular stopper 48 is formed coaxially with the collar 30 on one end side of each convex portion 46. . Thus, an annular first space 50 is formed between one stopper 48 and the flange 34 and between the other stopper 48 and the bracket 26.

The opposite ends of the pair of cylindrical portions 44 are inserted into the openings 32 in the bottom wall 24 of the upstream split casing 16, and the inner diameter of the opposite ends is equal to that of the collar 30 of the cylindrical portion 44. It is formed larger than the inner diameter of the portion in contact with the outer peripheral surface. Therefore, between the outer peripheral surface of the collar 30 and the inner peripheral surface of the opposite end of the cylindrical portion 44, an annular second space 52 is formed coaxially with the collar 30. The opposite ends of the pair of cylindrical portions 44 are axially separated from each other to form a gap L3, and an annular slit is formed coaxially with the collar 30 between the opposite ends. The opposite end of the cylindrical portion 44 is a tongue 54 extending coaxially with the collar 30 and along the axial direction.
4 forms the bottom of the receiving recess 48.

At a corner between the tongue piece 54 and the convex portion 46, a notch 56 having an arc-shaped cross section is annularly recessed coaxially with the collar 30.

At the end of the elastic body 40 on the flange 34 side of the cylindrical portion 44, this end surface contacts the flange 34 of the collar 30, and the cylindrical portion 44 of the other elastic body 42.
At the bracket 26 side end of the bracket 2
6 and between the stopper 48 and the flange 34 and the stopper 4 in the axial direction of the elastic bodies 40 and 42.
8 and the bracket 26, the gap L2 between the periphery of the opening 32 of the bottom wall 24 of the upstream split casing 16 and the convex portion 46, the gap L3 between the tongue pieces 54, and the elastic body 4
In the direction orthogonal to the axial directions 0 and 42, the gap L4 between the peripheral edge of the opening 32 of the bottom wall 24 of the upstream split casing 16 and the tongue piece 54 is appropriately set according to the desired vibration isolation performance. You.

Next, the operation of this embodiment will be described. First,
The vibration generated by the engine 22 is transmitted to the air cleaner 10 via the intake duct 20.

Among the vibrations transmitted to the air cleaner 10, the vibrations acting in the axial direction (Z direction) of the elastic bodies 40 and 42 are transmitted through the opening 32 in the bottom wall 24 of the upstream split casing 16.
The light is transmitted from the periphery to the convex portion 46, and the convex portion 46 is
In the first space 50, the elastic body 40,
The elastic members 40 and 42 are subjected to a shearing force by being cantilevered in the axial direction of 42 and elastically deformed.

Further, vibrations (for example, vibrations in the X direction) acting in a direction orthogonal to the cylinder length direction of the elastic bodies 40 and 42 or in a radial direction (radial direction) of the elastic bodies 40 and 42 are divided on the upstream side. The tongue piece 54 is transmitted from the periphery of the opening 32 of the bottom wall 24 of the casing 16 to the tongue piece 54, and the tongue piece 54 is resilient in the second space 52 around the connection part to the cylindrical portion 44.
The elastic members 40 and 42 are subjected to shearing force by bending in the radial direction and elastically deforming.

Accordingly, shear-type vibration isolation can be performed in the axial direction of the elastic bodies 40 and 42, in the direction orthogonal to the axial direction, and in the direction orthogonal to both directions, that is, three-dimensionally. Demonstrate. Therefore, a low spring constant (without sacrificing durability), which cannot be obtained with the compression type, is achieved, and both high vibration isolation performance and sufficient durability are ensured.

When a large amplitude is input to the elastic members 40 and 42 in the axial direction, the stopper 48 comes into contact with the flange 34 or the bracket 26 of the collar 30 due to the bending deformation of the convex portion 46, and excessive deformation is prevented. You. On the other hand, the notch 56 suppresses stress concentration. Further, the elastic bodies 40, 4
2 is divided into two parts, so that the elastic bodies 40 and 42
No stress exceeding the allowable value is applied. By these, the durability is further improved.

Further, in the supporting device 28 of the present embodiment, the shape of the elastic bodies 40 and 42 is different from the conventional compression-type elastic body 118 (see FIG. 11) on the outer peripheral surface, except for this. Is a conventional compression-type support device 102 (also shown in FIG.
That is, the elastic member is fitted on the outer peripheral surface of the collar, and the bolt inserted through the inside of the collar is screwed and fastened with a nut, whereby the assembly is completed and the pair of L members 154 is provided. As in the conventional support device 158 (see FIG. 14), there is no need for the troublesome work of separately fixing each L member 154 to the air cleaner side and the body side with bolts and nuts, and the number of components is reduced. The structure can be simplified, the cost can be reduced, and good assembling and mounting properties can be obtained.

FIG. 4 shows the result of measuring the vibration transmissibility τ to the body. The supporting device 28 of the present embodiment shown by a solid line is the conventional supporting device 136 (see FIG. 12) and 144 (see FIG. 13) shown by a dotted line, and the conventional supporting device 102 (see FIG. 11) shown by a dashed line. It can be seen that they exhibit excellent vibration isolation performance as compared with.

In transmitting vibration from the air cleaner to the body, a dynamic vibration damper 160 called a dynamic damper (FIG. 10) is used to absorb vibration in a certain frequency range.
May be attached to the casing of the air cleaner. According to the supporting device 28 of the present invention, due to its excellent anti-vibration performance, even if an expensive dynamic damper is not provided, an effect equal to or greater than that obtained when the dynamic damper is mounted on the conventional supporting device 102 is obtained. Is exhibited.

FIG. 5 shows the result of measuring the vibration transmissibility τ to confirm the effect.

The support device 28 of the present embodiment shown by a solid line is a conventional support device (the conventional support device 102 shown by a dotted line, in which a dynamic damper is provided in an air cleaner, and the dynamic damper shown by a dashed line, is not provided in an air cleaner. It can be seen that a better anti-vibration performance is exhibited as compared to the conventional support device 102).

The gap L1 is necessary to bend the convex portion 46, but the other gaps L2, L
3, L4 is not necessarily required.

Each component (the collar 30, the elastic members 40 and 42, etc.) of the support device 28 is not made to be an independently movable component (see FIG. 3), but as shown in FIG. One of the pair of elastic members 40 and 42 is bonded to the collar 30 or, as shown in FIG.
Also, 0 and 42 may be bonded to the outer peripheral surface of the collar 30, and although not shown, the elastic body 42 may be bonded to the bracket 26 side.

Next, a second embodiment will be described with reference to FIG. In the support 28 of the above embodiment, a pair of elastic members 4
Although 0 and 42 have a symmetric shape, in the support 66 of this embodiment, the pair of elastic bodies 60 and 62 have an asymmetric shape.

That is, the one elastic body 60 located on the flange side of the collar 30 has no tongue, and
On the other elastic body 62 located on the sixth side, an annular tongue piece 64 centering on the cylindrical portion 40 is formed having a second space 66 similar to that of the first embodiment between the cylindrical portion 40. ing.

The other structure is the same as that of the first embodiment. The convex portion 46 and the tongue piece 64 are bent and deformed, and the vibration exerts a shearing force on the elastic body in a three-dimensional direction. First
The same operation and effect as the embodiment can be obtained.

Next, a third embodiment will be described with reference to FIG. In the support device 70 of the present embodiment, the space between the tongue pieces 54
The pair of elastic members 40 and 42 are connected to a single elastic member 7 by being connected to the cylindrical portion 44 by a connection piece 72 formed in an annular shape coaxially.
4 are integrally formed.

The other structure is the same as that of the first embodiment. The convex portion 46 and the tongue piece 54 are bent and deformed, and the vibration exerts a shearing force on the elastic body 74 in a three-dimensional direction. In addition to providing the same functions and effects as the first embodiment, erroneous assembly of the elastic body 74 and the like are prevented.

It is preferable that the connecting piece 72 is simply connected to the tongue piece 54 within a range that does not affect the bending deformation of the tongue piece 54.

Further, in the above embodiment, the convex portion and the tongue piece have an annular shape, but one or more radial slits are formed in these, and even if the convex portion and the tongue piece are divided in the circumferential direction. Alternatively, a plurality of small projections or small tongue pieces may be annularly arranged in the cylindrical portion.

In this case, the number of slits or projections
The spring constant at the time of deformation can be adjusted according to the number of tongue pieces, and the desired vibration isolation performance can be easily obtained.

The tongue piece has a free end face as in the first and second embodiments, or has a free end face as in the third embodiment.
It is only necessary that the connection piece 72 has an annular groove so that the connection piece 72 can be elastically deformed.

In the above embodiment, the supporting device of the air cleaner used in the engine for the automobile has been described.
The invention is not limited to engines for automobiles.

[0050]

As described above, in the air cleaner support device according to the present invention, both high vibration proof performance against three-dimensional vibration and sufficient durability are ensured, and low cost and good Easy to assemble and mount.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view taken along a direction of air flow in a state where an air cleaner is supported by a support device according to a first embodiment of the present invention.

FIG. 2 is an enlarged sectional view showing a main part of the support device of FIG. 1;

FIG. 3 is an exploded sectional view showing a main part of the support device of FIG. 2;

FIG. 4 is a graph showing a vibration transmission rate to a body side.

FIG. 5 is another graph showing the transmission rate of vibration to the body side.

FIG. 6 is a view corresponding to FIG. 3, showing a main part of a modification.

FIG. 7 is a diagram corresponding to FIG. 3 and showing a main part of another modification.

FIG. 8 is a sectional view corresponding to FIG. 2 of a support device according to a second embodiment.

FIG. 9 is a cross-sectional view corresponding to FIG. 3 of a support device according to a third embodiment.

FIG. 10 is a cross-sectional view showing a state in which an air cleaner is supported by a conventional support device, cut along an air flow direction.

FIG. 11 is an enlarged sectional view showing a main part of the conventional support device of FIG.

FIG. 12 is a cross-sectional view corresponding to FIG. 11, showing a main part of another conventional supporting device in an enlarged manner.

FIG. 13 is a perspective view showing a main part of still another conventional supporting device.

FIG. 14 is a perspective view showing a main part of still another conventional supporting device.

[Explanation of symbols]

 Reference Signs List 10 air cleaner 24 bottom wall (supported portion) of upstream split casing 28 support device 40, 42 elastic body 46 convex portion 47 receiving concave portion 50 first space 52 second space 54 tongue piece

Claims (1)

(57) [Scope of request for utility model registration] 1. A supporting device for supporting an air cleaner via an elastic body, wherein an outer peripheral surface of an intermediate portion of a cylindrical main body of the elastic body has two annular projections or two annular projections projecting outward in the circumferential direction.
A group of convex portions is provided apart from each other to form a receiving concave portion for receiving a supported portion of the air cleaner. In the tubular main body, the two annular convex portions or 2 are provided.
The inner diameter of the portion forming the bottom of the receiving concave portion sandwiched between the convex portions of the group is made larger than the inner diameter of the other portion, and the portion of the cylindrical main body having the larger inner diameter has a free end face or an annular groove. A support device for an air cleaner, comprising: