JP3567948B2 - Liquid-filled mount - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a liquid-filled mount used to support a vibration body such as an automobile engine in a vibration-proof manner.
[0002]
[Prior art]
As shown in FIG. 3, in the liquid-filled mount, a stirring unit 52 is conventionally provided in the liquid chamber 51, and when vibration (load) in the front-rear and left-right directions is input to the mount, The stirring section 52 operates as a stopper to prevent the elastic body 53 from being excessively elastically deformed in the same direction and damaged (see Japanese Patent Application Laid-Open No. 6-129473).
[0003]
However, in this prior art, since no stopper is provided for vibration input in the vertical direction, when vertical vibration (load, particularly vibration in the rebound direction) is input to the mount, the elastic body 53 is moved in the same direction. May be excessively elastically deformed and damaged.
[0004]
[Problems to be solved by the invention]
In view of the above, the present invention provides not only a stopper for vibration input in the front-rear and left-right directions but also a stopper for vibration input in the vertical direction, so that the elastic body is less likely to be damaged and can exhibit excellent safety. It is intended to provide an enclosed mount. In addition, it is another object of the present invention to provide a liquid-filled mount capable of realizing "low dynamic spring" over a wide frequency range and exhibiting excellent damping characteristics and vibration-proof performance. .
[0005]
[Means for Solving the Problems]
In order to achieve the above object, a liquid-filled mount according to claim 1 of the present invention is provided with a stirrer disposed inside one of the mounting portions in a liquid chamber and integrally having a cylindrical portion and an outward flange portion. An orifice member disposed in the liquid chamber is provided on the one mounting portion side of the partition portion disposed inside the other mounting portion, and the outward flange portion of the stirring portion and the partition portion are bounded in the bound direction. A first stopper portion is provided so as to oppose , an outward flange portion of the stirring portion and the orifice member are opposed to each other in a rebound direction, and a second stopper portion is provided, and a tubular portion of the stirring portion and the orifice member are provided. preparative the third stopper portion so as to face in a direction perpendicular provided for the bi-directional, an orifice for pair frequency vibration between the orifice member and the stirring section, the tubular in the stirring section The outer peripheral surface and the outward flange portion of the upper surface of the outer peripheral surface and the lower surface and that the rubber-like elastic material made of cushion is bonded by vulcanization integrally to and film.
[0006]
In the liquid-filled mount according to claim 2 of the present invention, in the liquid-filled mount according to claim 1, a hole is formed in the orifice member to provide a second orifice for high-frequency vibration.
[0007]
[Action]
When a downward (boundary) vibration having a magnitude equal to or greater than a predetermined value is input to the liquid-filled mount according to claim 1 of the present invention having the above-described configuration, the agitating section and the partitioning section come into contact with each other and the first section comes into contact. Of the elastic body is stopped, whereby the elastic body is stopped from further elastically deforming. When an upward (rebound) vibration of a predetermined value or more is input to the mount, the stirrer and the orifice member come into contact with each other to operate the second stopper, thereby displacing the elastic body. As described above, the elastic deformation is stopped. Further, when vibrations in the front-rear and left-right directions (directions orthogonal to the bounce direction and the rebound direction) having a magnitude equal to or larger than a predetermined value are input to the mount, the agitator and the orifice member come into contact with each other and the third stopper is formed. The part is actuated, thereby stopping the elastic body from further elastically deforming.
[0008]
In the liquid-filled mount according to the first aspect, since the orifice for high-frequency vibration is provided between the stirring section and the orifice member, the orifice resonates with respect to high-frequency vibration of a predetermined frequency. Therefore, it is possible to suppress the high frequency vibration.
[0009]
In addition to this, in the liquid-filled mount according to the second aspect of the present invention having the above configuration, since the orifice member is provided with a hole and a second high-frequency vibration orifice is provided, By making the resonance frequency different from that of the orifice for high-frequency vibration according to the first aspect, it is possible to absorb and suppress high-frequency vibration of another predetermined frequency.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
In order to provide both the agitating portion and the orifice member, the second stopper portion that operates when an upward vibration is input and the third stopper portion that operates when the front, rear, left, and right vibrations are input, it is necessary to use both of them. Preferably, the configuration is as follows.
[0011]
That is, first, a cylindrical portion is provided in the agitating portion provided below one of the mounting portions, and an outward flange portion is provided in a lower end portion of the cylindrical portion. In opposition to this, an orifice member provided above the partition portion is provided with an annular support portion disposed on the outer peripheral side of the outward flange portion of the stirring portion, and an upper end portion of the support portion is provided with an annular support portion. An inward flange portion is provided above the outward flange portion, and a cylindrical portion provided on the outer peripheral side of the cylindrical portion of the stirring section is provided at an inner peripheral end of the inward flange portion. Then, a gap of a predetermined size is set between the outward flange portion and the inward flange portion, and between the tubular portion and the tubular portion, the former being the second stopper portion, and the latter being the third stopper portion. Stopper part.
[0012]
Further, one or both of the lower surface of the outward flange portion and the upper surface of the partition portion abutting on each other, one or both of the upper surface of the outward flange portion and the lower surface of the inward flange portion, and the outer peripheral surface of the cylindrical portion and the cylinder When a cushion made of a rubber-like elastic material is attached to one or both of the inner peripheral surfaces of the shaped portions, a cushioning effect is exerted when the stoppers come into contact with each other.
[0013]
【Example】
Next, embodiments of the present invention will be described with reference to the drawings. This embodiment is a common embodiment of the invention according to claims 1 and 2 of the present application.
[0014]
As shown in FIG. 1, one mounting portion 1 having a center boss 2 and a mounting bolt 3 and the other mounting portion 4 having a ring-shaped case 5, a cup-shaped lid 6 and a mounting bolt 7 have a ring shape. It is connected via an elastic body (also referred to as a rubber leg) 8 made of rubber-like elastic material, and a diaphragm 9 made of rubber-like elastic material is connected to the other mounting part 4 with its outer peripheral edge, and is surrounded by these. An airtight space 10 is provided inside the mount, and the airtight space 10 is provided with a partition (a partition member, a partition plate or a first orifice member) disposed inside (the inner peripheral side) of the other mounting portion 4. 11), a first liquid chamber (also referred to as a main liquid chamber) 12 on one mounting portion 1 side (upper side), and a second liquid chamber (also referred to as a sub liquid chamber) 13 on the diaphragm 9 side (lower side). And the two compartments 12, 13 in the partition 11 (Also referred to as the orifice channel) 14 is provided through orifices in the chambers 12, 13 (also referred to as the encapsulating liquid) working fluid such as a viscous fluid 15 is sealed. The orifice 14 exerts a damping force when the hydraulic fluid 15 passes through the orifice 14 when low-frequency, large-amplitude vibration is input to the mount. The elastic body 8 is vulcanized and bonded to the center boss 2 and the case 5, and the lower end of the case 5 collectively fixes the outer peripheral edges of the partition 11, the diaphragm 9 and the lid 6 together. The inside of the lid 6 is opened to the atmosphere by a vent (not shown).
[0015]
A stirrer (also referred to as a stirrer or stirrer) 16 made of a rigid material such as a metal having an annular shape is fixedly attached to the inside (lower side) of the center boss 2 by tightening a holt 17 and a nut 18. It is arranged in the liquid chamber 12. The stirring section 16 first has a tubular section 16a, and an inward mounting flange section 16b sandwiched between the center boss 2 and the nut 18 is integrally provided at the upper end of the tubular section 16a. An outward flange 16c is integrally provided at the lower end of the cylindrical portion 16a. A rubber-like elastic buffer member 19 is integrally and vulcanized and adhered to the inner peripheral surface and the outer peripheral surface of the cylindrical portion 16a and the upper surface, the outer peripheral surface, and the lower surface of the outward flange portion 16c in a film shape.
[0016]
An orifice member (also referred to as a second orifice member) 20 made of a rigid material such as a metal and having an annular shape is provided on the upper side of the partition portion 11. And is attached to the case 5 by being caulked and fixed, and is disposed in the first liquid chamber 12. The orifice member 20 first has the above-described flat outer peripheral edge portion 20a, and a tapered support portion 20b formed to have a gradually increasing diameter at an inner peripheral end portion of the outer peripheral edge portion 20a. An inward flange portion 20c is integrally provided at an upper end portion of the support portion 20b, and a cylindrical portion 20d is integrally formed upward at an inner peripheral end portion of the inward flange portion 20c. Is provided. The support portion 20b is disposed on the outer peripheral side of the outward flange portion 16c of the stirring portion 16, the inward flange portion 20c is disposed above the outward flange portion 16c of the stirring portion 16, and the cylindrical portion 20d is disposed on the outer side of the stirring portion 16. It is arranged on the outer peripheral side of the cylindrical portion 16a.
[0017]
When the outward flange portion 16c of the stirring portion 16 and the partition portion 11 are vertically opposed to each other, as shown in an enlarged view in FIG. 16c, 11 annular gap 21 having a predetermined size x ₁ is set between the first stopper portion 22 exhibiting a circular is constituted by the two 16c, 11. Further, when the outward flange portion 16c of the stirring section 16 and the inward flange portion 20c of the orifice member 20 vertically oppose each other, as shown in the enlarged view of FIG. to, both 16c, annular gap 23 having a predetermined size _{x 2} during 20c is set, the second stopper portion 24 exhibiting a circular is constituted by the two 16c, 20c. Further, the cylindrical portion 16a of the stirring section 16 and the cylindrical portion 20d of the orifice member 20 face each other in the front-rear and left-right directions, and as shown in an enlarged view in FIG. An annular gap 25 provided with an annular gap ₃ is set, and the two gaps 16a and 20d constitute an annular third stopper portion 26.
[0018]
Further, the gap 23 in the second stopper 24 and the gap 25 in the third stopper 26 form an annular first high-frequency vibration orifice 27, and a required number of holes 20e are formed in the support portion 20b of the orifice member 20. The second orifice 28 for high frequency vibration is formed by this hole 20e. The orifices 27 and 28 have different orifice characteristics.
[0019]
In the liquid-filled mount having the above configuration, one of the one mounting portion 1 and the other mounting portion 4 is connected to a support such as a vehicle body of an automobile and the other is connected to a supported body such as an engine. The supported body such as the engine is elastically supported, and the input vibration is absorbed and suppressed mainly by the elastic deformation of the elastic body 8 and the flow resistance of the working fluid 15 passing through the orifice 14. When high-frequency vibration (high-frequency micro-vibration) of a frequency is input, as shown by arrows A and B in FIG. 2, the hydraulic fluid 15 enters and exits the first orifice 27 for high-frequency vibration, and resonates. The absolute spring constant of the mount is kept low, and this high-frequency vibration can be effectively absorbed and suppressed. When high-frequency vibration (high-frequency fine vibration) of a different frequency (this frequency is also predetermined) is input due to a change in the vehicle speed or the number of revolutions of the engine, as shown by arrows C and D in FIG. Since the hydraulic fluid 15 enters and exits the second orifice 28 for high-frequency vibration and resonates, the absolute spring constant of the mount is also kept low at this time, whereby 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 these facts, and the damping characteristic or vibration isolation performance of the mount can be improved.
[0020]
Further, when a downward (boundary) vibration having a magnitude equal to or greater than a predetermined value is input to the liquid-filled mount having the above configuration, the outward flange 16c of the stirring section 16 and the partition 11 come into contact with each other, and One of the stopper portions 22 is operated, thereby stopping the elastic body 8 from being further elastically deformed. When an upward (rebound) vibration of a predetermined value or more is input to the mount, the outward flange 16c of the agitating section 16 and the inward flange 20c of the orifice member 20 come into contact with each other, and The second stopper portion 24 is operated, whereby the elastic body 8 is stopped from further elastically deforming. When vibrations in the front-rear and left-right directions (directions orthogonal to the bounce direction and the rebound direction) having a magnitude equal to or larger than a predetermined value are input to the mount, the cylindrical portion 16 a of the stirring section 16 and the cylindrical The third stopper 26 operates by the portions 20d abutting on each other, thereby stopping the elastic body 8 from being further elastically deformed. Accordingly, excessive elastic deformation of the elastic body 8 is restricted omnidirectionally from these facts, and damage to the elastic body 8 is substantially completely prevented. Therefore, in this sense, it is possible to provide an anti-vibration mount exhibiting excellent safety or durability.
[0021]
When the first stopper portion 22 operates, the cushioning member 19 attached to the lower surface of the outward flange portion 16c of the stirring portion 16 has a cushioning effect. When the second stopper portion 24 operates, the stirring portion When the third stopper portion 26 operates, the cushioning member 19 attached to the upper surface of the outward flange portion 16c of the stirring portion 16c is attached to the outer peripheral surface of the cylindrical portion 16a of the stirring portion 16. The buffer 19 has a cushioning effect. Therefore, an impact is unlikely to be generated when the stoppers 22, 24, 26 are operated, so that the stoppers 22, 24, 26 operate smoothly.
[0022]
【The invention's effect】
The present invention has the following effects.
[0023]
That is, first, in the liquid-filled mount according to the first aspect of the present invention having the above configuration, not only the stopper against the vibration input in the front-rear and left-right directions (the direction orthogonal to the bound direction and the rebound direction) but also the vertical direction ( Since the stopper for the vibration input in the bound direction and the rebound direction is provided, excessive elastic deformation of the elastic body is restricted in all directions, and damage to the elastic body is substantially completely prevented. You. Therefore, in this sense, it is possible to provide an anti-vibration mount exhibiting excellent safety or durability.
[0024]
In addition to this, in the liquid-filled mount according to the second aspect of the present invention having the above configuration, not only the first orifice for high-frequency vibration but also the orifice for high-frequency vibration against high-frequency vibration. Due to the resonance operation, "low dynamic spring" of the mount can be realized over a wide frequency range, and the damping characteristic or vibration isolation performance of the mount can be improved.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a liquid-filled mount according to an embodiment of the present invention. FIG. 2 is an enlarged cross-sectional view of a main part of the liquid-filled mount. Description]
DESCRIPTION OF SYMBOLS 1 One mounting part 2 Center boss 3, 7 Mounting bolt 4 The other mounting part 5 Case 6 Cover 8 Elastic body 9 Diaphragm 10 Airtight space 11 Partition part 12 First liquid chamber (liquid chamber)
13 Second liquid chamber 14 Orifice 15 Hydraulic fluid 16 Stirrer 16a, 20d Cylindrical part 16b Mounting flange 16c Outward flange 17 Bolt 18 Nut 19 Buffer 20 Orifice member 20a Outer peripheral edge 20b Support 20c Inward flange 21, 23, 25 Gap 22 First stopper 24 Second stopper 26 Third stopper 27 First orifice for high frequency vibration (orifice for high frequency vibration)
28 Second Orifice for High Frequency Vibration

Claims (2)

A stirrer (16) is provided inside the liquid chamber (12) inside one of the mounting portions (1) and integrally has a cylindrical portion (16a) and an outward flange portion (16c). An orifice member (20) disposed in the liquid chamber (12) is provided on the one mounting part (1) side of the partition part (11) disposed inside the part (4);
The stirring portion outward flange portion (16c) and said partition portion (11) and the first stopper portion is opposed to the bound direction (22) is provided in (16), an outward flange of the agitating portion (16) A second stopper portion (24) is provided so that the portion (16c) and the orifice member (20) face each other in the rebound direction, and the cylindrical portion (16a) of the stirring section (16 ) and the orifice member (20) are provided. And a third stopper portion (26) is provided so as to face in a direction perpendicular to the two directions, and a high-frequency vibration orifice (27) is provided between the stirring portion (16) and the orifice member (20). the provided
On the outer peripheral surface of the cylindrical portion (16a) and the upper surface, the outer peripheral surface and the lower surface of the outward flange portion (16c) in the agitating portion (16), a rubber-like elastic material buffer (19) is integrally formed. A liquid-filled mount that is vulcanized and bonded in a shape . 2. The liquid-filled mount according to claim 1, wherein a hole (20e) is formed in the orifice member (20) to provide a second orifice (28) for high-frequency vibration.

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