JPH0925980A - Liquid-charged mount - Google Patents

Abstract

PROBLEM TO BE SOLVED: To disturb the break of an elastic body by providing stopper parts, facing to a partition part vertically in a stiring part and facing to the stiring part at the opposite side to the partition part vertically in an elastic body and facing to the stiring part in front/rear and left/right direction in the elastic body in a freely contactable manner and providing an orifice for high frequency vibration between the stiring part and the elastic body. SOLUTION: By downward vibration of a prescribed value or more, the stopper part 20 of a stiring part 16 and a partition part 11 are contacted by eliminating the clearance 21 and the deformation more than that of an elastic body 6 is stopped. By the upward vibration more than the prescribed value, the stopper part 8a of the elastic body 8 and the outward flange part 16c of the stiring part 16 are contacted by eliminating the clearance 23 and the deformation more than that of the elastic body 8 is stopped. By the vibration in a front/rear and left/right direction more than the prescribed value, the stopper part 8b of the elastic body 8 is contacted with the bent outer periphery edge part 16d of the stiring part 16 and the deformation more than that of the elastic body 8 is stopped. In addition, the orifice 27 between the stiring part 16 and the elastic body 8 resonates for a prescribed high frequency vibration and the vibration is absorbed. The brake of the elastic body is thus prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid-filled mount used for supporting a vibration body such as an automobile engine in a vibration-proof manner.

[0002]

2. Description of the Related Art As disclosed in, for example, Japanese Patent Application Laid-Open No. 6-129473, a liquid-filled mount has conventionally been provided with an agitating section (acting member) in a liquid chamber.
When vibration (load) in the front-rear and left-right directions is input to the mount, this agitating part acts as a stopper, causing the elastic body (elastic coupling body) to be excessively elastically deformed in the same direction and damaged. There is nothing to do.

However, in this prior art, since no stopper is provided for the vertical vibration input, when a vertical vibration (load) is input to the mount, the elastic body is excessively elastic in the same direction. It may be deformed and damaged.

[0004]

In view of the above points, the present invention is provided with not only stoppers for vibration input in the front-rear and left-right directions but also stoppers for vibration input in the up-and-down directions, so that the elastic body is less likely to be damaged and is excellent in safety. It is an object of the present invention to provide a liquid-filled mount capable of exhibiting the properties. At the same time, a "low motion spring" is used over a wide frequency range.
It is an object of the present invention to provide a liquid-filled mount capable of realizing the above-mentioned characteristics and exhibiting excellent damping characteristics.

[0005]

In order to achieve the above object, a liquid-filled mount according to claim 1 of the present invention is provided with an agitating section arranged inside a liquid chamber inside one mounting section,
The stirring section is provided with a first stopper section made of a rubber-like elastic material that vertically abuts the partition section disposed inside the other mounting section, and the one mounting section and the other mounting section are provided. On the elastic body made of a rubber-like elastic material that is connected to the section, a second stopper section that opposes the stirring section in the vertical direction is provided on the side opposite to the partition section. A third stopper portion is provided so as to face the stirring portion in the front-rear and left-right directions so as to be freely contactable, and an orifice for high frequency vibration is provided between the stirring portion and the elastic body.

A liquid-filled mount according to a second aspect of the present invention is the liquid-filled mount according to the first aspect, further comprising a second stirring section arranged in the liquid chamber between the one mounting section and the stirring section. A second orifice for high frequency vibration is provided between the second stirring section and the inner wall of the liquid chamber.

[0007]

When a downward (bounce side) vibration (load) of a predetermined value or more is input to the liquid-filled mount according to claim 1 of the present invention having the above-mentioned configuration, the first mount provided on the stirring section The one stopper portion and the partition portion are brought into contact with each other, thereby stopping further elastic deformation of the elastic body. At the time of contact, since the first stopper portion is made of a rubber-like elastic material, a cushioning effect is exerted. When an upward (rebound side) vibration of a predetermined value or more is input to the mount, the second stopper portion and the stirring portion provided on the elastic body come into contact with each other, which causes the elastic body to move. As a result, the elastic deformation is stopped. At the time of contact, since the second stopper portion is integral with the elastic body and made of a rubber-like elastic material, a cushioning action is exerted. Also, when vibration in the front-back and left-right directions of a predetermined value or more is input to the mount, the third stopper portion and the stirring portion provided on the elastic body come into contact with each other, which causes the elastic body to further elastically move. Deformation is stopped. At the time of contact, since the third stopper portion is also integral with the elastic body and made of a rubber-like elastic material, a cushioning action is exerted.

Further, in the liquid-filled mount according to the present invention, since the orifice for high frequency vibration is provided between the stirring portion and the elastic body, this orifice is provided for high frequency vibration of a predetermined frequency. It is possible to perform resonance operation, and thus absorb and suppress this high frequency vibration.

In addition to this, in the liquid-filled mount according to claim 2 of the present invention having the above-mentioned structure, the second orifice for high-frequency vibration is provided between the second stirring section and the inner wall of the liquid chamber. The above-mentioned claim 1 due to the provision of
It is possible to suppress the high frequency vibration of another predetermined frequency by making the resonance frequency different from that of the high frequency vibration orifice.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION

Next, an embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 1, one mounting portion 1 provided with a center boss 2 and a mounting bolt 3 and another mounting portion 4 provided with an annular case 5, a cup-shaped lid 6 and a mounting bolt 7. Are connected via an elastic body (also referred to as a rubber leg) 8 made of a rubber-like elastic material having an annular shape, and a diaphragm 9 made of a rubber-like elastic material is connected to the other mounting portion 4 with its outer peripheral edge portion, An airtight space 10 is provided inside the mount surrounded by these, and the airtight space 10 is
A first liquid chamber (also referred to as a main liquid chamber) on the side of one mounting portion 1 (upper side) by a partition portion (also referred to as a partition member or a partition plate) 11 arranged inside (inner peripheral side) of the other mounting portion 4.
12 and a second liquid chamber (also referred to as a sub liquid chamber) 13 on the diaphragm 9 side (lower side), and both chambers 1 are provided in a partition portion 11.
An orifice 14 that connects the two chambers 2 and 13 is provided,
A working fluid 15 such as a viscous fluid is enclosed in the reference numerals 2 and 13.
The orifice 14 exerts a damping force when the hydraulic fluid 15 passes through the orifice 14 when a low-frequency, large-amplitude vibration is input to the mount. The elastic body 8 is vulcanized and adhered to the center boss 2 and the case 5, and the case 5 has a partition portion 11,
The outer peripheral edge portions of the diaphragm 9 and the lid 6 are caulked and fixed.

A first stirring portion (also referred to as a first stirring member or a first stirring plate) 16 made of a rigid material such as a metal having an annular shape is provided inside the center boss 2 (a lower side) with a halt 17 and a nut 18. It is fixedly attached by tightening
It is arranged in the first liquid chamber 12. Further, between the center boss 2 and the first stirring portion 16, a second stirring portion (also referred to as a second stirring member or a second stirring plate) 19 made of a rigid material such as a metal, which is also annular, is fixed. It is sandwiched between the first liquid chamber 12 and the first liquid chamber 12.

The first stirring section 16 is a mounting flange section 16
a, a cylindrical portion 16b, an outward flange portion 16c, and an annular bent outer peripheral edge portion 16d bent downward, are integrally provided in this order, and the lower surface of the outward flange portion 16c and the bent outer peripheral edge portion 16d and the cylindrical portion. A first stopper portion (also referred to as a second elastic body) 20 made of a rubber-like elastic material having an annular shape is vulcanized and adhered to the inner peripheral surface of 16b, and the first stopper portion 20 and the partition portion 11 are vertically moved. Facing each other,
As shown in an enlarged view in FIG. 2, when 1 G (initial load) is applied to the mount in the vertical direction, an annular gap 21 having a predetermined size x ₁ is set between the two 20 and 11. The first and second vertical stoppers 22 having an annular shape are constituted by the two members 20 and 11.

An annular second stopper portion 8a is integrally formed on the inner side (inner peripheral side) of the elastic body 8, and the outward flange portion 1 of the second stopper portion 8a and the first stirring portion 16 is formed.
As shown in an enlarged view in FIG. 2, when the mount is subjected to a vertical direction of 1 G (initial load), a predetermined size x ₂ between both 8a and 16c is provided. A ring-shaped gap 23 with a
A second vertical stopper 24 having an annular shape is formed by c. The second stopper portion 8a is formed integrally with the inner wall of the elastic body 8 in a protruding shape.

A third stopper portion 8b having an annular shape is integrally formed with the elastic body 8 inside the case 5 (on the inner peripheral side), and the third stopper portion 8b and the first stirring portion 16 are integrated with each other. The bent outer peripheral edge portion 16d faces the front, rear, left, and right directions, and
As shown in enlarged form, a gap 25 having a predetermined size x ₃ is set between the two 8b and 16d.
An annular front-rear and left-right stopper 26 is formed by b and 16d. The third stopper portion 8b is vulcanized and adhered to the inner wall of the case 5 in a film shape.

The gap 23 in the second vertical stopper 24 and the gap 2 in the front-rear, left-right stopper 26
5, the first orifice 27 for high frequency vibration is formed.

In the inner wall of the first liquid chamber 12, the inner wall of the elastic body 8 is a tapered portion 8c which widens downwards except for the second stopper portion 8a and the third stopper portion 8b. A taper portion 19a is provided on the outer peripheral surface of the second stirring portion 19 having a substantially umbrella shape so as to face the taper portion 8c, and as shown in an enlarged view of FIG. When a load is applied, an annular gap 28 having a predetermined size x ₄ is set between the outer peripheral surface of the second stirring section 19 and the elastic body 8, and the second pair is formed by this gap 28. The high frequency vibration orifice 29 is configured. The second orifice 29 for high frequency vibration and the first orifice 27 for high frequency vibration are set to have different flow passage cross-sectional areas (different flow passage lengths) and different from each other. It has orifice characteristics.

The liquid-filled mount having the above structure is
One of the one mounting portion 1 and the other mounting portion 4 is connected to a support side such as a vehicle body of an automobile and the other is connected to a supported side such as an engine to elastically support the supported body such as the engine. The input vibration is supported and suppressed mainly by elastic deformation of the elastic body 8 and flow resistance of the hydraulic fluid 15 passing through the orifice 14, but high frequency vibration (high frequency micro vibration) of a predetermined specific frequency. 2 is input, the hydraulic fluid 15 moves in and out of the first orifice 27 for high frequency vibration as shown by arrows A and B, and resonates, so that the absolute spring constant of the mount is suppressed to a low level. As a result, this high frequency vibration can be effectively absorbed and suppressed. When high-frequency vibration (high-frequency micro-vibration) of a different frequency (this frequency is also predetermined) is input due to changes in the vehicle speed or the number of revolutions of the engine, as shown by arrow C in FIG. Since 15 goes in and out of the second orifice 29 for high-frequency vibration, and resonates, the absolute spring constant of the mount is kept low at this time as well,
As a result, this high frequency vibration can be effectively absorbed and suppressed. Therefore, the "low dynamic spring" of the mount can be realized over a wide frequency range from the above, and the damping characteristic or the damping performance of the mount can be improved.

When a downward (bounding) vibration (load) of a predetermined value or more is input to the liquid-filled mount having the above-described structure, the liquid is mounted on the first stopper portion 20 provided on the stirring portion 16. Since the partition portion 11 comes into contact with the partition portion 11 without the gap 21, the elastic body 8 is stopped from being further elastically deformed. Further, when an upward (rebound side) vibration of a predetermined value or more is input to the mount, the second stopper portion 8a provided on the elastic body 8 and the outward flange portion 16c of the stirring portion 16 are separated from each other by a gap. Since the contact is made without 23, the elastic body 8 is stopped from being further elastically deformed. Further, when vibration in the front-rear and left-right directions having a magnitude larger than a predetermined value is input to the mount, the third stopper portion 8b provided on the elastic body 8 and the bent outer peripheral edge portion 16d of the stirring portion 16 come into contact with each other. Then, the elastic body 8 is stopped from being further elastically deformed. Therefore, excessive elastic deformation of the elastic body 8 is limited in all directions, and damage to the elastic body 8 is substantially completely prevented. Therefore, in this sense, it is possible to provide a vibration-proof mount exhibiting excellent safety and durability.

When the first stopper portion 20 and the partition portion 11 come into contact with each other, a cushioning action is exerted because the first stopper portion 20 is made of a rubber-like elastic material. Further, when the second stopper portion 8a and the outward flange portion 16c of the stirring portion 16 come into contact with each other, the second stopper portion 8a is integral with the elastic body 8 and is made of a rubber-like elastic material. The cushioning effect is demonstrated. Also, the third stopper portion 8b
When the bent outer peripheral edge portion 16d of the stirring portion 16 comes into contact with each other, since the third stopper portion 8b is also integral with the elastic body 8 and made of a rubber-like elastic material, a cushioning action is exerted. . Therefore, from these things, each stopper 2
An impact is unlikely to be generated during the operation of 2, 24 and 26, and there is an effect that the respective stoppers 22, 24 and 26 operate smoothly.

[0021]

The present invention has the following effects.

That is, first, in the liquid-filled mount according to claim 1 of the present invention having the above-mentioned structure, not only the stopper for the vibration input in the front-rear, left-right direction but also the stopper for the vibration input in the up-down direction is provided. In addition, excessive elastic deformation of the elastic body is limited in all directions, and damage to the elastic body is substantially completely prevented.
Therefore, in this sense, it is possible to provide a vibration-proof mount exhibiting excellent safety and durability. Further, since each stopper exerts a cushioning action utilizing the elasticity of the rubber-like elastic material, an impact is unlikely to occur when each stopper is operated, and each stopper has an effect of operating smoothly.

In addition to this, in the liquid-filled mount according to claim 2 of the present invention having the above structure, not only the first orifice for high frequency vibration but also the second orifice for high frequency vibration vibrates at high frequency. Because of the resonance operation, the "low dynamic spring" of the mount can be realized over a wide frequency range, and the damping characteristic or the damping performance of the mount can be improved.

[Brief description of drawings]

FIG. 1 is a sectional view of a liquid-filled mount according to an embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a main part of the liquid-filled mount.

[Explanation of symbols]

 1 One mounting portion 2 Center boss 3,7 Mounting bolt 4 Other mounting portion 5 Case 6 Lid 8 Elastic body 8a Second stopper portion 8b Third stopper portion 8c Taper portion 9 Diaphragm 10 Airtight space 11 Partition portion 12th One-liquid chamber 13 Second liquid chamber 14 Orifice 15 Hydraulic fluid 16 First stirring portion 16a Mounting flange portion 16b Cylindrical portion 16c Outward flange portion 16d Bending outer peripheral edge portion 17 Bolt 18 Nut 19 Second stirring portion 19a Tapered portion 20 First stopper portion 21, 23, 25, 28 Gap 22 First vertical stopper 24 Second vertical stopper 26 Front-rear left-right stopper 27 First high-frequency vibration orifice 29 Second high-frequency vibration orifice

Claims (2)

[Claims] 1. A liquid chamber (1) is provided inside one of the mounting portions (1).
2) a stirring section (16) arranged inside is provided, and the stirring section (16) opposes a partition section (11) arranged inside the other mounting section (4) so as to be vertically abuttable. An elastic body (8) made of a rubber-like elastic material is provided with a first stopper portion (20) made of a rubber-like elastic material, and the one mounting portion (1) and the other mounting portion (4) are connected to each other. On the side opposite to the partition part (11), a second stopper part (8a) facing the agitating part (16) so as to come into contact in the vertical direction is provided, and the elastic part (8) also has the agitating part. A third stopper portion (8b) is provided so as to face the (16) in the front-rear and left-right directions so as to be freely contactable, and an orifice (27) for high frequency vibration is provided between the stirring portion (16) and the elastic body (8). A liquid-filled mount characterized by being provided with. 2. The liquid-filled mount according to claim 1, wherein the second stirring section (19) is arranged in the liquid chamber (12) between the one mounting section (1) and the stirring section (16). Is provided
A liquid-filled mount characterized in that a second orifice (29) for high frequency vibration is provided between the second stirring section (19) and the inner wall of the liquid chamber (12).