JP2004211804A - Cylindrical liquid-sealed vibration control mount and vibrating frequency tuning method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem on the generation of noise by transmitting the gear noise generated at a transmission side by resonance of a stopper part into a cabin while amplifying the same, in a cylindrical liquid-sealed transmission mount comprising a resin stopper part for controlling the excess radial relative displacement of rigid outer cylindrical member and inner cylindrical member. <P>SOLUTION: In this cylindrical liquid-sealed transmission mount 10 having the rigid outer cylindrical member 12 and inner cylindrical member 14, the rubber elastic body 16 mounted between the outer and inner cylindrical members, a liquid chamber 24, and a resin stopper part 38 radially stood like a pillar from the inner cylindrical member 14 into the liquid chamber 24 toward the outer cylindrical member 12, a tip part of the stopper part 38 is composed of a metallic mass part 48 having specific mass. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylindrical liquid-sealed anti-vibration mount suitable as a transmission mount and the like, and more particularly, a column-shaped and resin stopper that stands in a liquid chamber and restricts excessive radial displacement between an outer cylinder member and an inner cylinder member. It relates to the one provided with a part.
[0002]
[Prior art]
Conventionally, a rigid outer cylinder member and an inner cylinder member, a rubber elastic body interposed between the outer cylinder member and the inner cylinder member, a liquid chamber in which an incompressible liquid is sealed, and a The inner cylinder is erected in the liquid chamber from the inner cylinder member at a distance from the wall surface, and stands in a columnar shape in the radial direction toward the outer cylinder member, and the free end is brought into contact with the outer cylinder member side. 2. Description of the Related Art A tubular liquid-sealed anti-vibration mount having a resin stopper that restricts excessive relative displacement in the radial direction between a member and an outer cylindrical member is known.
For example, Patent Document 1 listed below discloses this type of cylindrical liquid-sealed anti-vibration mount.
[0003]
FIG. 10 shows an example of a conventional cylindrical liquid-sealed vibration-proof mount.
In the figure, reference numeral 200 denotes a cylindrical liquid-sealed anti-vibration mount (hereinafter, simply referred to as an anti-vibration mount), which includes a rigid outer cylinder member 202 made of metal, a rigid inner cylinder member 204 also made of metal, and And a rubber elastic body 206 interposed therebetween.
[0004]
A pair of metal intermediate rings 208 is provided on the outer peripheral portion and each axial end of the rubber elastic body 206.
Here, the pair of front and rear intermediate rings 208 in the axial direction are axially connected to each other by a pair of connecting portions 210 at predetermined locations in the circumferential direction, as shown in FIG.
[0005]
The anti-vibration mount 200 has one main liquid chamber 212 defined by an outer cylinder member 202 and a rubber elastic body 206 and two sub liquid chambers 214 below the main liquid chamber 212 in the drawing. , An incompressible liquid L is sealed therein.
The main liquid chamber 212 and the sub liquid chamber 214 communicate with each other through an orifice passage 216, and the liquid L in the main liquid chamber 212 and the sub liquid chamber 214 can move with each other through the orifice passage 216.
[0006]
Reference numeral 218 denotes a seal rubber portion, and the main liquid chamber 212 and the sub liquid chamber 214 are liquid-tightly sealed by the seal rubber portion 218.
Reference numeral 220 denotes a columnar stopper integrally formed with the inner cylinder member 204. The stopper 220 is provided between the inner cylinder member 204 and the main liquid chamber 212 at a distance from the inner wall surface of the main liquid chamber 212. In addition, it stands in the radial direction toward the outer cylinder member 202.
The stopper portion 220 is substantially composed of a resin main body 221 made entirely of a hard resin, and has a form in which the entire surface is covered with a rubber film 222 formed integrally with the rubber elastic body 206. I have.
[0007]
The stopper portion 220 has a function of restricting an excessive relative displacement in the radial direction between the outer cylinder member 202 and the inner cylinder member 204 by abutting a free end on the outer cylinder member 202.
In FIG. 10B, reference numeral 224 denotes a space.
[0008]
The anti-vibration mount 200 is used, for example, as a transmission mount. In this case, for example, the inner cylinder member 204 is fixed to the body side, and the outer cylinder member 202 is fixed to the transmission side, and these bodies and the transmission are elastically connected. And prevent vibration transmission between them.
More specifically, when vibration is applied from the outside, the liquid L is elastically deformed and the liquid L flows between the main liquid chamber 212 and the sub liquid chamber 214 through the orifice passage 216 to absorb the vibration and to absorb vibration. Eggplant
[0009]
Also, when the outer cylinder member 202 is relatively displaced in the approaching direction with respect to the inner cylinder member 204 at the time of vibration input from the outside, the stopper portion 220 abuts on the outer cylinder member 202, so that their excessive relative displacement in the radial direction is reduced. regulate.
[0010]
In this type of anti-vibration mount 200, the stopper 220 is configured only to satisfy the stopper function, and its material and shape have been considered with emphasis on ease of production and durability.
[0011]
For example, conventionally, the stopper portion 220 is made of metal or resin (in the example of FIG. 10 is made of resin), and if the stopper portion 220 is made of metal, When a lump of metal is welded to the inner cylinder member 204 and the stopper 220 is made of resin, the stopper 220 is formed integrally with the inner cylinder 204 by injection molding or the like. .
[0012]
If the entire stopper 220 (excluding the rubber film 222) is made of metal, there is a problem that the whole anti-vibration mount 200 becomes heavy. There is an advantage that the mount 200 can be reduced in weight, and in order to reduce the weight, the stopper 220 is made of resin.
In this case, the resin stopper portion 220 is selected from a hard resin material that substantially prevents further relative displacement when it comes into contact with the outer cylinder member 202.
For example, glass fiber-containing polyamide 66 (PA66) or the like is used as such a hard resin material.
[0013]
[Patent Document 1]
JP-A-11-125289
[Problems to be solved by the invention]
By the way, in a vehicle using such an anti-vibration mount 200 as a transmission mount, for example, it has been found that there is a problem of generating cabin noise around 3200 rpm, and various investigations were conducted to investigate the cause. It was found that the noise was a gear noise caused by a gear input at the time of gear engagement on the transmission side being applied as a vibration input.
[0015]
Then, while further studying the path through which the gear noise is transmitted into the vehicle interior, the user focused on the anti-vibration mount 200 and examined its behavior. The stopper 220 of the anti-vibration mount 200 generated vibration. Turned out to be. Specifically, the free end side of the stopper portion 220 generates vibration around the base end on the inner cylinder member 204 side in a direction perpendicular to the axis of the stopper portion 220, particularly in the left-right direction in FIG. Turned out to be.
[0016]
Therefore, in order to confirm whether the vibration of the stopper portion 220 in the vehicle front-rear direction (falling vibration) is a cause of the cabin noise in question, the outer cylinder member is mounted with the anti-vibration mount 200 mounted on the vehicle. Vibration was applied from the 202 side, that is, the transmission side, and an accelerometer was attached to the inner cylinder member 204 side to perform a vibration test. As a result, vibration transmission characteristics as shown in FIG. 11 were obtained.
[0017]
Here, the horizontal axis in the figure represents the frequency of the vibration input, and the vertical axis represents the inertance (acceleration / force) on the inner cylinder member 204 side.
When the number of gear teeth on the transmission side is 49, the vibration frequency of the gear sound, which is the vehicle interior noise, is 2600 Hz under an engine speed of 3200 rpm.
[0018]
Looking at the vibration measurement results in FIG. 11, a peak appears at 2600 Hz.
From this, the present inventors concluded that the high-frequency cabin noise having a frequency of about 2600 Hz generated around an engine rotation speed of 3200 rpm was caused by the falling vibration of the stopper portion 220 in the anti-vibration mount 200. .
That is, a high-frequency vibration input resulting from toothing at the time of gear engagement is amplified there by resonance of the falling vibration of the stopper portion 220 in the anti-vibration mount 200 and transmitted to the body side, that is, the vehicle interior, and this is transmitted to the vehicle interior noise (gear noise). A) to come to a conclusion.
[0019]
FIG. 12 shows the results of examining the vibration characteristics of the case where the resin stopper 220 is integrally formed with the inner cylinder member 204 (excluding the rubber film 222) in the X, Y, and Z directions. Is represented.
Here, the X direction is the axial direction of the inner cylinder member 204, that is, the vehicle longitudinal direction, the Z direction is the axial direction of the columnar stopper 220, that is, the vertical direction of the vehicle, and the Y direction is the lateral direction of the vehicle.
[0020]
In the result of FIG. 12B, a peak occurs at about 2300 Hz in the X direction. That is, it is understood that the resonance of the stopper 220 occurs at this frequency.
This vibration test is, so to speak, a test of the stopper portion 220 alone. The vibration test mount 200 is formed using the stopper portion, and the rigidity is increased by about 10% when assembled to a vehicle. Shifts to a higher frequency side and becomes about 2600 Hz.
Therefore, this result also indicates that the tilting vibration of the stopper 220 resonates with the vibration applied by gear toothing to amplify and transmit the gear sound.
[0021]
Although the above description has focused on the transmission mount, this problem is a problem that can occur in common with other anti-vibration devices using this type of anti-vibration mount 200 due to the stopper portion 220 falling down and resonating.
[0022]
[Means for Solving the Problems]
The cylindrical liquid-sealed anti-vibration mount and the vibration frequency tuning method of the present invention have been devised to solve such a problem.
The first aspect of the present invention relates to a cylindrical liquid-sealed anti-vibration mount, wherein (a) a rigid outer cylindrical member and an inner cylindrical member, and (b) an intermediate member provided between the outer cylindrical member and the inner cylindrical member. (C) a liquid chamber in which an incompressible liquid is sealed, and (d) a base end fixed to the inner cylinder member, and a gap between the rubber chamber and the inner wall surface of the liquid chamber. And standing upright in a columnar shape in the radial direction from the inner cylindrical member toward the liquid chamber and toward the outer cylindrical member, and a free end is brought into contact with the outer cylindrical member side, so that the outer cylindrical member and the inner cylindrical member And a resin stopper for restricting excessive relative displacement in the radial direction with respect to the member. A cylindrical liquid-sealed anti-vibration mount, wherein the tip of the stopper is made of a metal having a predetermined mass. It is characterized by being constituted as.
[0023]
According to the second aspect, (A) a rigid outer cylinder member and an inner cylinder member; (B) a rubber elastic body interposed between the outer cylinder member and the inner cylinder member; (D) a base end is fixed to the inner cylindrical member, and a space is provided between the inner cylindrical member and the inner and outer walls of the liquid chamber. It stands up in a columnar shape in the radial direction toward the cylindrical member, and a free end is brought into contact with the outer cylindrical member to restrict excessive relative displacement in the radial direction between the outer cylindrical member and the inner cylindrical member. A cylindrical liquid-sealed anti-vibration mount having a resin stopper portion, wherein a tip portion of the stopper portion is configured as a mass portion made of metal or resin, and the mass portion is formed by a rubber connection portion. The stopper is connected to the resin body.
[0024]
According to a third aspect of the present invention, in any one of the first and second aspects, a main liquid chamber and a sub liquid chamber are provided as the liquid chamber, and the main liquid chamber and the sub liquid chamber communicate with each other through an orifice passage. And the stopper portion stands upright in the main liquid chamber.
[0025]
According to a fourth aspect, in any one of the first to third aspects, the stopper portion has a rubber film covering a surface.
[0026]
According to a fifth aspect, in any one of the first to fourth aspects, the cylindrical mount is a transmission mount.
[0027]
According to a sixth aspect of the present invention, in the fifth aspect, the mass of the mass portion is such that the natural vibration frequency of the vibration in the direction perpendicular to the axis of the stopper portion on the free end side of the stopper portion is different from that at the time of gear engagement It is characterized in that the frequency is set to be different from the frequency of the vibration input caused by the toothing.
[0028]
According to a seventh aspect, in the sixth aspect, the vibration of the stopper portion is a vibration in a vehicle longitudinal direction.
[0029]
Claim 8 relates to a method of tuning the vibration frequency of the cylindrical liquid-sealed anti-vibration mount, wherein (a) a rigid outer cylinder member and an inner cylinder member, and (b) interposed between the outer cylinder member and the inner cylinder member. (C) a liquid chamber in which an incompressible liquid is sealed, and (d) a base end fixed to the internal member and spaced apart from the inner wall surface of the liquid chamber. The outer cylinder member and the inner cylinder member are erected in the liquid chamber from the inner cylinder member in a columnar shape in the radial direction toward the outer cylinder member, and the free ends are brought into contact with the outer cylinder member. A stopper made of resin for restricting excessive relative displacement in the radial direction with respect to the cylindrical liquid-sealed anti-vibration mount, the vibration of the stopper in the direction perpendicular to the axis of the stopper on the free end side of the stopper. A method of tuning a specific vibration frequency, wherein a tip of the stopper portion has a predetermined mass. Configured as a mass part having, characterized by tuning the vibration frequency of the stopper portion by adjusting the mass of the mass portion.
[0030]
[Action and effect of the invention]
As described above, according to the first aspect, the distal end of the resin stopper is configured as a metal mass having a predetermined mass.
According to a second aspect of the present invention, the distal end of the resin stopper is formed as a metal or resin mass, and this is connected to the resin body of the stopper as a rubber connection.
By doing so, the natural frequency of the resin-made columnar stopper portion can be made different from the frequency at which the problem occurs, and therefore, noise generation in the vehicle interior due to the fall resonance of the columnar stopper portion can be reduced. Effective prevention can be achieved.
[0031]
In the present invention, a main liquid chamber and a sub liquid chamber may be provided as the liquid chamber, and they may be connected to each other through an orifice passage (claim 3).
Further, the stopper portion may be formed in a form in which the surface is covered with a rubber film (claim 4).
[0032]
Further, the present invention is particularly suitable for being applied to a transmission mount for supporting a transmission in a vibration-proof manner (claim 5).
[0033]
In this case, the mass of the mass portion is determined so that the natural vibration frequency (natural frequency) of the stopper portion is different from the frequency of the vibration input caused by toothing during gear engagement. (Claim 6).
This makes it possible to solve the problem that the stopper portion causes resonance with vibration input caused by gear toothing, amplifies the gear sound, and transmits the gear sound to the vehicle interior.
[0034]
In particular, the mass of the mass portion can be determined so that the vibration frequency of the stopper portion in the vehicle longitudinal direction is different from the frequency of the vibration input caused by gear toothing (claim 7).
[0035]
Next, the mass of the mass portion is adjusted so that the natural frequency of the falling vibration of the stopper portion is tuned so as to be different from the problematic frequency. The vehicle interior noise resulting from the phenomenon can be satisfactorily reduced.
[0036]
【Example】
Next, an embodiment in which the present invention is applied to a transmission mount will be described in detail with reference to the drawings.
In FIGS. 1 and 2, reference numeral 10 denotes a transmission mount of the present embodiment, which includes a metal rigid outer cylinder member 12, a metal rigid inner cylinder member 14, and a rubber elastic body 16 interposed therebetween. Have.
Here, the rubber elastic body 16 is integrally vulcanized and bonded to the inner cylinder member 14.
[0037]
As shown in FIG. 1B, the rubber elastic body 16 includes a pair of rubber legs 16a extending from the inner cylinder member 14 to the outer cylinder member 12 so as to form an inverted C shape. A) has a rubber wall 16b as shown in FIG.
In the transmission mount 10, as shown in FIG. 1A, a pair of metal rigid intermediate rings 18 are provided on the outer peripheral portion of the rubber elastic body 16 and on the left and right ends (ends in the front-rear direction) in the figure. Is provided.
[0038]
Here, the intermediate ring 18 is integrally fixed to the rubber elastic body 16 by vulcanization bonding.
On the other hand, the outer cylinder member 12 is formed separately from the rubber elastic body, and is fitted to the rubber elastic body 16 on the outer peripheral side of the intermediate ring 18.
That is, the outer cylinder member 12 is drawn in the diameter reducing direction from the shape of the outer cylinder member 12 at the time of molding, and is assembled on the outer peripheral side of the intermediate ring 18.
[0039]
The pair of intermediate rings 18 are connected to each other at a predetermined position in the circumferential direction at a connecting portion 20 shown in FIG.
The transmission mount 10 includes a main liquid chamber 24 formed inside by a rubber elastic body 16, that is, a pair of rubber legs 16a, a rubber wall 16b, and an outer cylindrical member 12, as shown in FIG. It has a pair of sub liquid chambers 26 formed on the middle and lower sides, and incompressible liquid L is sealed in these liquid chambers. As the liquid L sealed in the liquid chamber, water, alkylene glycol, polyalkylene glycol, silicone oil, or the like can be used. In particular, a low-viscosity fluid of 0.1 Pa · s or less can be suitably used.
The internal volume of the main liquid chamber 24 changes narrowly due to the elastic deformation of the rubber elastic body when the transmission is loaded.
[0040]
As shown in FIGS. 1 to 7, the main liquid chamber 24 and the sub liquid chamber 26 on the left side in FIG. 1B (FIG. 3 to FIG. 1 (B), and a communication passage 32 is formed between the left sub liquid chamber 26 and the right sub liquid chamber 26 in FIG. 1 (B). The liquid L is movable between the main liquid chamber 24 and the pair of sub liquid chambers 26 through the orifice passage 28 and the communication passage 32.
[0041]
As shown in FIG. 1B, a rubber film 29 is provided below the rubber elastic body 16 in a state where a space 30 is formed therebetween.
As shown in FIGS. 3, 4, and 7, the rubber film 29 includes a pair of bulging portions 30a bulging from the outer cylinder member 12 toward the inner cylinder member 14; A lower portion has a connecting portion 30b for connecting them to each other, and the auxiliary liquid chamber 26 is formed between the pair of bulges 30a and the outer cylinder member 12.
The pair of bulging portions 30a are provided with ribs 31 for reinforcement.
[0042]
A seal rubber 34 is interposed between the intermediate ring 18 and the connecting portion 20 thereof and the outer cylindrical member 12 in a state where the seal rubber 34 is compressed in the radial direction by the seal rubber 34. Are sealed liquid-tightly.
[0043]
A resin block 36 made of a hard resin is integrally formed with the inner cylinder member 14.
The resin block 36 protrudes from the inner cylinder member 14 into the main liquid chamber 24 and toward the outer cylinder member 12 in a columnar shape in the radial direction. A second protrusion protrudes downward from the member 14 in FIG. 1A, and the resin body 40 in the first stopper 38 is formed by the first protrusion upward.
[0044]
Here, the resin block 36 is made of a hard resin which is harder than the rubber elastic body 16 and has a stopper function substantially equivalent to that of metal. Here, polyamide 66 containing glass fiber (PA66) is used as such a resin.
The downward projecting portion constitutes a resin main body 46 of the second stopper portion 44 formed together with the rubber layer 42 covering the projecting portion.
[0045]
A metal mass 48 having a predetermined mass is provided at the tip of the resin main body 40 in the first stopper portion 38, and the metal mass 48 is fixed to the resin main body 40, and furthermore, A first stopper 38 having a columnar shape is formed together with the rubber film 50 covering the surface.
[0046]
Here, the first stopper portion 38 is provided so as to stand up from the inner cylinder member 14 toward the outer cylinder member 12 at a distance from the inner wall surface of the main liquid chamber 24, and the distal end side is particularly fixed. It has a free end that is not.
[0047]
In the case of the transmission mount 10 of the present embodiment, for example, the inner cylinder member 14 is fixed to the body side via a bracket, and the outer cylinder member 12 is also fixed to the transmission side via a bracket. Elastically connected to support the transmission in vibration isolation.
More specifically, the input vibration is absorbed by the elastic deformation of the rubber elastic body 16 and the flow of the liquid L in the main liquid chamber 24 and the sub liquid chamber 26 through the orifice passage 28, and the vibration is isolated between the body side and the transmission side. I do.
[0048]
When the outer cylinder member 12 is relatively close to the inner cylinder member 14 in the radial direction (the direction shown in the drawing), the first stopper portion 38 causes the distal end face in FIG. , The further relative movement of the outer cylinder member 12 and the inner cylinder member 14 is prevented, and excessive relative displacement of the outer cylinder member 12 and the inner cylinder member 14 is restricted. .
[0049]
In the transmission mount 10 of the present embodiment, the first stopper portion 38 has a free end portion at the tip end side. Therefore, when a vibration input due to toothing at the time of gear engagement is applied from the transmission side, the first stopper portion 38 is in the first position. The free end on the distal end side of the stopper portion 38 generates vibration (falling vibration) in a direction perpendicular to the axis of the first stopper portion 38, particularly in the longitudinal direction of the vehicle, about the base end on the side of the inner cylinder member 14.
At this time, in this example, since the distal end portion of the first stopper portion 40 is configured as a metal mass portion 48 having a predetermined mass, the mass of the metal mass portion 48 is appropriately selected so that the second mass portion 48 is selected. The unique vibration frequency of the one stopper portion 38 can be selected to be different from the frequency of the vibration input.
[0050]
Therefore, according to the present embodiment, the vibration frequency specific to the first stopper portion 38 coincides with the vibration input from the outside to cause resonance, and the rattling noise at the time of gear engagement is amplified in the vehicle interior based on the resonance. Can be satisfactorily prevented from being transmitted.
[0051]
FIG. 8 shows the result of assembling the transmission mount 10 to a vehicle, applying vibration to the outer cylinder member 12 with a hammer, and measuring the acceleration at the inner cylinder member 14 to examine the vibration transmission characteristics of the transmission mount 10. Represents.
[0052]
Here, the horizontal axis represents the excitation frequency, and the vertical axis represents the inertance.
However, this measurement result represents the measurement result when the mass of the metal mass 48 is about 20 g.
[0053]
The curve shown by the dotted line in FIG. 8 shows the measurement result of the conventional product in which the metal mass portion 48 of the present example was made of a hard resin, and the curve shown by the solid line shows the transmission mount 10 of the present example. Represents the measurement results for
[0054]
As shown in this result, in the case of the transmission mount 10 of the present example, the peak at about 2600 Hz that appears in the conventional transmission mount is shifted to the lower frequency side, and this is caused by gear engagement. It can be seen that the first stopper portion 38 is prevented from resonating in response to the applied high frequency vibration input, so that transmission of the gear sound into the vehicle interior is suppressed well.
[0055]
Next, FIG. 9 shows another embodiment of the present invention.
In this example, the first stopper portion 38 is configured by connecting the metal mass portion 48 to the resin body 40 by the rubber connection portion 52.
Even in such a case, the vibration frequency of the first stopper portion 38 can be reduced by appropriately changing the mass of the metal mass portion 48, and further by appropriately changing the spring constant of the rubber connecting portion 52. It is possible to tune to a frequency different from the resonance frequency, and thus, according to this embodiment, it is also possible to effectively prevent the gear noise from being amplified and transmitted into the vehicle interior.
[0056]
In the case of the embodiment of FIG. 9, there is obtained an advantage that the stopper touch can be made a soft touch by the connecting rubber at the time of the stopper action by the first stopper portion.
In the embodiment shown in FIG. 9, it is also possible to use a resin mass 48 instead of the metal mass 48.
[0057]
Although the embodiment of the present invention has been described in detail above, this is merely an example, and the present invention can be applied to an anti-vibration mount other than the above-described transmission mount, and various modifications may be made without departing from the spirit thereof. It can be configured and implemented in different forms and modes.
[Brief description of the drawings]
FIG. 1 is a front sectional view and a side sectional view of an anti-vibration mount according to an embodiment of the present invention.
FIG. 2 is a partially cutaway perspective view showing the anti-vibration mount of the embodiment with an outer cylinder member removed.
FIG. 3 is a perspective view from the bottom surface side of the anti-vibration mount of the embodiment, with the outer cylinder member removed;
FIG. 4 is a side perspective view showing the anti-vibration mount of the embodiment without an outer cylinder member.
FIG. 5 is a perspective view of the anti-vibration mount of FIG. 4 with a part cut away.
FIG. 6 is a side view of the anti-vibration mount of FIG. 4;
FIG. 7 is a front view and a bottom view of the anti-vibration mount of FIG. 4;
FIG. 8 is a diagram showing vibration transmission characteristics of the transmission mount of the embodiment in comparison with a conventional product.
FIG. 9 is a diagram of another embodiment of the present invention.
FIG. 10 is a front sectional view and a side sectional view of a conventional transmission mount.
FIG. 11 is a diagram showing vibration transmission characteristics of the conventional transmission mount of FIG. 10;
12 is a diagram showing the vibration transmission characteristics of the stopper unit alone in FIG. 10 together with the vibration direction.
[Explanation of symbols]
REFERENCE SIGNS LIST 10 transmission mount 12 outer cylinder member 14 inner cylinder member 16 rubber elastic body 24 main liquid chamber 26 sub liquid chamber 28 orifice passage 38 first stopper portions 40 and 46 resin body 44 second stopper portion 48 metal mass portion 50 rubber Membrane 52 Rubber connection L Incompressible liquid

Claims (8)

(A) a rigid outer cylinder member and an inner cylinder member, (b) a rubber elastic body interposed between the outer cylinder member and the inner cylinder member, and (c) a liquid in which an incompressible liquid is sealed. A chamber and (d) a base end fixed to the inner cylinder member, and spaced from the inner wall surface of the liquid chamber from the inner cylinder member into the liquid chamber and toward the outer cylinder member in a radial direction. A resin stopper portion that stands up in a columnar shape, abuts a tip that is a free end on the outer cylinder member side, and regulates an excessive radial relative displacement between the outer cylinder member and the inner cylinder member, A cylindrical liquid-sealed anti-vibration mount having
A tip end of the stopper portion is configured as a mass portion made of a metal having a predetermined mass. (A) a rigid outer cylinder member and an inner cylinder member, (b) a rubber elastic body interposed between the outer cylinder member and the inner cylinder member, and (c) a liquid in which an incompressible liquid is sealed. A chamber and (d) a base end fixed to the inner cylinder member, and spaced from the inner wall surface of the liquid chamber from the inner cylinder member into the liquid chamber and toward the outer cylinder member in a radial direction. A resin stopper portion that stands up in a columnar shape, abuts a tip that is a free end on the outer cylinder member side, and regulates an excessive radial relative displacement between the outer cylinder member and the inner cylinder member, A cylindrical liquid-sealed anti-vibration mount having
The tip end of the stopper portion is configured as a mass portion made of metal or resin, and the mass portion is connected to the resin body of the stopper portion by a rubber connection portion. Shake mount. The liquid chamber according to any one of claims 1 and 2, wherein a main liquid chamber and a sub liquid chamber are provided as the liquid chamber, and the main liquid chamber and the sub liquid chamber communicate with each other through an orifice passage. A cylindrical liquid-sealed anti-vibration mount, wherein the stopper portion stands upright in a room. The cylindrical liquid-sealed anti-vibration mount according to any one of claims 1 to 3, wherein the stopper has a rubber film covering the surface. The cylindrical liquid-tight vibration-proof mount according to any one of claims 1 to 4, wherein the cylindrical mount is a transmission mount. 6. The vibration input caused by toothing at the time of gear engagement according to claim 5, wherein the mass of the mass portion has a characteristic vibration frequency of a vibration in a direction perpendicular to the axis of the stopper portion on the free end side of the stopper portion. A cylindrical liquid ring vibration isolating mount characterized in that the frequency is determined to be different from the above frequency. 7. The cylindrical liquid-tight vibration-proof mount according to claim 6, wherein the vibration of the stopper portion is a vibration in a vehicle longitudinal direction. (A) a rigid outer cylinder member and an inner cylinder member, (b) a rubber elastic body interposed between the outer cylinder member and the inner cylinder member, and (c) a liquid in which an incompressible liquid is sealed. A chamber and (d) a base end fixed to the internal member, and spaced from the inner wall surface of the liquid chamber from the inner cylindrical member into the liquid chamber and radially toward the outer cylindrical member. A resin stopper that stands up in a columnar shape, abuts the tip that is a free end against the outer cylinder member side, and regulates excessive relative displacement in the radial direction between the outer cylinder member and the inner cylinder member. A method of tuning a specific vibration frequency of vibration in a direction perpendicular to an axis of the stopper portion on the free end side of the stopper portion in the cylindrical liquid seal vibration isolating mount having,
The vibration of the cylindrical liquid seal vibration isolating mount is characterized in that a tip portion of the stopper portion is configured as a mass portion having a predetermined mass, and the vibration frequency of the stopper portion is tuned by adjusting the mass of the mass portion. Frequency tuning method.

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