JP2001271865A - Fluid-filled vibration control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve workability in assembling an outer cylinder fitting onto an intermediate fitting side and to improve sealing performance between the outer cylinder fitting and the intermediate cylinder fitting in a fluid-filled vibration control device. SOLUTION: This fluid-filled vibration control device is provided with an inner cylinder fitting 10; a pair of ring parts 21a and 21b disposed at both axial ends with a space outside of the inner cylinder fitting 10; the cylindrical intermediate fitting 20 having a connecting part 22 integrally connecting the ring parts and forming an aperture part 25 in between; a rubber elastic body 30 connecting the intermediate fitting and inner cylinder fitting and having a recessed part 33 corresponding to the aperture part; and an outer cylinder fitting 50 on the outer peripheral side. The outer diameter of the ring part 21a on the press-in tip side of the intermediate fitting is made slightly larger than the inner diameter of the outer cylinder fitting, and a first rubber elastic body seal part 43 is provided at a small diameter part on the axial inside. The outer diameter of the ring part 21b on the press-in rear side of the intermediate fitting is made slightly smaller than the inner diameter of the outer cylinder fitting. A thin-walled second rubber elastic body seal part 44 is provided at the outer periphery of the ring part on the rear side, and two annular seal lips 44a are disposed on the axial direction on the inside.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid filled type vibration damping device.

[0002]

2. Description of the Related Art Conventionally, this type of liquid-filled type vibration damping device is
For example, as shown in FIGS. 14 to 16, the inner cylindrical member 1 is disposed coaxially at a distance outside the inner cylindrical member 1, and is provided at a position opposed to a pair of ring portions 2 a at both ends in the axial direction in a radial direction. The two ring portions 2a are connected to each other and a pair of window portions 2c are interposed therebetween.
A cylindrical intermediate fitting 2 having a connecting portion 2b forming
A pair of side walls 3a radially connecting the ring portion 2a and the inner tube 1 and a pair of side walls 3a extending in the axial direction inside the connection 2b to connect the connection 2b to the inner tube 1. Arm 3b and a thin seal portion 3c provided outside the ring portion, and a pair of recesses 3d which are surrounded by the pair of side walls 3a and the arm 3b and open to the pair of windows 2c. And a cylindrical rubber elastic body 3 having the same.

[0003] Further, an outer tube fitting 5 is inserted into the outside of the middle fitting 2 and is fixed to the middle fitting 2 via a seal portion 3c by drawing. With this outer tube fitting 5,
An orifice passage 7 is formed between each intermediate chamber 2 and the connecting part 2b so as to form a pair of liquid chambers 6 in each of the recesses 3d by liquid-tightly closing the intermediate fitting 2. I have.

In this liquid filled type vibration damping device, for example, the inner cylinder fitting 1 is vertically connected to a support member (not shown) on the vehicle body side with the two liquid chambers 6 facing the front-rear direction of the vehicle and the rear side. The outer cylinder fitting 5 is connected to the sub-frame (not shown), and receives an input of vibration from an oblique direction according to the acceleration and deceleration of the vehicle from the sub-frame, and functions to attenuate the vibration.

[0005]

However, in the above-described liquid-filled type vibration damping device, the outer cylindrical fitting 5 is provided outside the intermediate fitting 2.
Must be drawn and fixed to the outer tube fitting 5 after the outer fitting, so that the manufacturing process becomes complicated and the manufacturing cost increases.

On the other hand, as a reference example of the liquid filled type vibration damping device, as shown in FIG. 12, the outer diameter of the ring portion 8a of the intermediate fitting 8 is made slightly larger than the inner diameter of the outer tubular fitting 5. The inner end side in the axial direction of the ring portion 8a is reduced to a small diameter portion 8b, and an annular rubber elastic seal portion 9 is provided on the outer periphery of the small diameter portion 8b. One that is fixed by press-fitting from the flange portion 5a side into the outer cylindrical metal fitting 5 having the flange portion 5a extending outward in the direction may be considered.

As shown in FIG. 13, an intermediate metal fitting 8 of the vibration isolator is provided on a rubber elastic body seal portion 9 with an annular seal slightly protruding in the radial direction extending all the way along the circumferential direction. Two lips 9a are provided. for that reason,
When the intermediate fitting 8 is press-fitted into the outer cylinder fitting 5 (in the direction of arrow T in the figure), the seal lip 9
a is pushed out of the ring portion X and is crushed, but there is no problem.
As for a, the seal lip 9a is pressed against the large diameter side of the ring portion Y, and there is no escape place. Due to the presence of the seal lip 9a, the press-fitting force in the ring portion Y increases, so that the press-fitting of the intermediate fitting 8 becomes difficult, and the intermediate fitting 8 may be deformed at this portion. Further, the seal lip 9a may be chipped due to a high pressure input,
Due to the lack of the seal lip 9a, there is a problem that the sealing performance at the ring portion Y is reduced.

SUMMARY OF THE INVENTION The present invention is to solve the above-mentioned problem, and has a good workability of assembling an outer cylinder to an intermediate metal and a liquid encapsulation having a good sealing property between the outer metal and the intermediate metal. An object of the present invention is to provide a vibration isolator.

[0009]

In order to achieve the above-mentioned object, the structural features of the invention described in claim 1 are provided with an inner cylinder and a space outside the inner cylinder. A pair of ring portions at both ends in the axial direction and a connecting portion that integrally connects the pair of ring portions are provided, and a cylindrical intermediate metal fitting having a window opening between the ring portion and the connecting portion, and an intermediate metal fitting. A rubber elastic body elastically connecting the inner cylindrical fittings and having a concave portion opened to the window, a cylindrical portion, and a flange portion extending radially outward at one axial end of the cylindrical portion. An intermediate metal fitting connected to the inner cylindrical metal fitting by a rubber elastic body is press-fitted from the flange portion side to the inner peripheral side of the cylindrical portion and fixed to the cylindrical portion, and liquid-tightly closes the gap with the intermediate metal fitting. A liquid-filling type vibration damping device, comprising: an outer metal fitting for forming a liquid chamber in the recess; Before injection of the outer diameter of the ring portion of the press-fitting tip side of the intermediate sleeve is provided within the axial end side together is slightly larger than the inner diameter of the outer sleeve is reduced in diameter,
An annular first rubber elastic body sealing portion extending along the circumferential direction is provided on the outer periphery of the reduced diameter portion, and the outer diameter of the ring portion after the press-fitting of the intermediate metal fitting is slightly smaller than the inner diameter of the outer cylindrical metal fitting. In addition, an annular second rubber elastic seal portion extending along the circumferential direction is provided on the outer periphery of the rear ring portion.

[0010] In the first aspect of the present invention constructed as described above, since the outer cylinder is assembled to the intermediate metal by press-fitting, drawing of the outer cylinder is unnecessary.
Also, when fixing the intermediate metal fitting to the inner peripheral side of the outer cylindrical metal fitting by press-fitting, the outer diameter of the ring portion on the press-fitting side of the intermediate metal fitting is slightly larger than the inner diameter of the outer cylindrical metal fitting. The part is firmly fixed to the outer cylinder fitting, and the sealing property is ensured by the first rubber elastic body sealing part. further,
Since the outer diameter of the ring portion on the side after the press-fitting of the intermediate fitting is made slightly smaller than the inner diameter of the outer cylindrical fitting, a thin second rubber elastic body seal portion is provided on the outer periphery of the rear ring portion.
The second rubber elastic seal is appropriately compressed by the press fitting of the intermediate metal fitting, and the press fitting is smoothly performed.

In the liquid filled type vibration damping device according to the first aspect of the present invention, the first and second rubber elastic seal portions are provided with an annular seal slightly protruding in the radial direction extending all around the circumferential direction. Two lips can be provided in the axial direction.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIGS. 1, 2 and 3 are cross-sectional views taken along the line II of FIG. ,
FIG. 2 is a sectional view and a plan view taken along the line II-II. 4, 5, 6, and 7 are a plan view, a cross-sectional view taken along line VV, and a cross-sectional view taken along line VI-VI of the intermediate product before the outer metal fitting is mounted.
FIG. 2 is a sectional view taken along a line VII-VII.

The liquid-filled type vibration damping device includes an inner cylindrical member 10 which is a pipe-shaped metal member, and a pair of ring portions 21a and 21b which are disposed outside the inner cylindrical member 10 and are coaxial with each other. A substantially cylindrical intermediate metal member 20 having a pair of connecting portions 22 to be connected, a substantially cylindrical rubber elastic body 30 for elastically connecting the intermediate metal member 20 and the inner cylindrical metal member 10, and a liquid outside the intermediate metal member 20. And an outer cylinder fitting 50 that is tightly fixed.

An annular stopper member 11 made of resin is externally fixed to the outer peripheral surface of the inner cylinder fitting 10. The stopper member 11 has a position slightly shifted from the axial center position to the one end 10a and the other end 1 at the opposite position in the radial direction.
A first protruding portion 12 and a second protruding portion 13 which protrude radially at positions slightly shifted from 0b are provided. The stopper member 11 is usually formed integrally with the inner cylinder fitting 10 by resin molding.
May be fixed by bonding. Also, the stopper member is
It may be made of metal instead of resin.

The intermediate metal fitting 20 has a shorter axial length than the inner cylindrical metal fitting 10, and is disposed at a substantially axially symmetric position between both ends of the inner cylindrical metal fitting 10. The intermediate fitting 20 has an outer diameter of a ring portion 21a at one end (lower end in the drawing) slightly larger than an inner diameter of the outer cylindrical fitting 50 before being press-fitted into the outer cylindrical fitting 50, and has a second end (upper end in the drawing). The outer diameter of the ring portion 21b is slightly smaller than the inner diameter of the outer tube fitting 50. Further, the inner end side in the axial direction of the ring portion 21a is a small diameter portion 21c whose diameter is reduced according to the outer diameter of the ring portion 21b.
As shown in FIG. 7, the pair of connecting portions 22 of the intermediate metal fitting 20 extend circumferentially at a predetermined central angle width at radially opposed positions, and extend in the axial direction to form a pair of rings at both ends. The portions 21a and 21b are integrally connected. Connecting part 2
2 are ring portions 21 at both ends in the axial direction, as shown in FIG.
The small-diameter portion 23a is connected to the small-diameter portion 21c and the ring portion 21b and extends, and a central portion in the axial direction sandwiched between both end portions in the axial direction is a small-diameter portion 23 having a further reduced diameter. A portion surrounded by each of the ring portions 21a and 21b and each of the connecting portions 22 forms a pair of window portions 25.

The rubber elastic body 30 connects the intermediate metal fitting 20 and the inner cylindrical metal fitting 10 over substantially the entire circumference in the axial direction.
An annular first recess 31 and a second recess called a bulge extending along the inner cylindrical member 10 from the ring portions 21a and 21b to the vicinity of the position where the stopper member 11 of the inner cylindrical member 10 is provided at both end portions in the axial direction. A part 32 is provided. First recess 3
The first and second recesses 32 have a large width near the end in the axial direction and a narrow width inside the first and second concave portions 32. The first concave portion 31 on the other end side (upper end in the drawing) has a deep first portion 31a extending to the vicinity of the first projecting portion 12 of the stopper member 11, and a shallow second portion 31b extending to the vicinity of the second projecting portion 13. , Both connecting parts 22
Are formed so as to communicate with each other in the circumferential direction. Further, the second concave portion 32 on one end side (the lower end in the figure) has a very shallow first portion 32 a extending to the vicinity of the first projecting portion 12 of the stopper member 11 and a deep second portion 32 a extending to the vicinity of the second projecting portion 13. The part 32b and a pair of very shallow third parts 32c of both connecting parts 22 are formed so as to communicate in the circumferential direction. In each window 25 of the intermediate fitting 20 corresponding to the first projecting portion 12 and the second projecting portion 13 of the stopper member 11, the first concave portion 33 in which the rubber elastic body 30 is formed is provided.
And the second concave portion 34. Further, between the connecting portions 22 and the inner cylindrical fitting 10 is an arm portion 35 connecting the both.

Due to the first concave portion 33 and the deep first portion 31a of the first concave portion 31, the rubber elastic body is formed on the first diaphragm portion 36 which is a thin and long side wall portion in the axial direction. The first diaphragm part 36 includes a ring part 21b.
And a connection portion with the inner cylinder fitting 10 is connected substantially perpendicularly thereto, and the cross-sectional shape in the axial direction is substantially S-shaped. Further, the rubber elastic body is formed in the second diaphragm portion 37 which is a thin and short side wall portion in the axial direction by the very shallow first portion 32a of the first concave portion 33 and the second concave portion 32. Similarly to the first diaphragm part 36, the connection part of the second diaphragm part 37 with the ring part 21a and the inner cylinder fitting 10 is connected substantially perpendicular thereto, and the axial cross-sectional shape is substantially S. It is shaped like a letter.

The second concave portion 34 and the second concave portion 31
By the portion 31b, the rubber elastic body is formed on the third diaphragm portion 38 which is a thin side wall portion having a short axial length. Similarly to the first diaphragm part 36, the third diaphragm part 38 has a substantially S-shaped cross section in the axial direction. Due to the second concave portion 34 and the deep second portion 32b of the second concave portion 32, the rubber elastic body is formed on the fourth diaphragm portion 39 which is a thin-walled and long side wall portion in the axial direction. Similarly to the first diaphragm part 36, the fourth diaphragm part 39 has the ring part 21a and the inner cylindrical metal fitting 10 as well.
Are connected substantially perpendicularly to them, and the cross-sectional shape in the axial direction is substantially S-shaped.

As shown in FIGS. 5 and 6, a part of the rubber elastic body 30 has a pair of portions slightly raised from the outer circumferences of the ring portions 21a and 21b on the outer circumference side of the connecting portion 22 of the intermediate fitting 20. It is provided as an outer rubber portion 41. A groove 42 extending on both sides along the circumferential direction is provided at an axially intermediate position on the outer peripheral surface of one outer rubber portion 41. On the outer peripheral surface of the small diameter portion 21c of the ring portion 21a, a thin first rubber elastic body sealing portion 43 is provided. As shown in FIG. 8, the first rubber elastic body sealing portion 43 has an annular sealing lip 43 slightly protruding radially all around the circumference.
a are provided. Further, a thin second rubber elastic body seal portion 44 is provided on the entire outer peripheral surface of the ring portion 21b. As shown in FIG. 8, the second rubber elastic body sealing portion 44
At the inner end in the axial direction, there are provided two annular seal lips 44a slightly projecting radially all around the circumference.

The rubber elastic body 30 is vulcanized by setting the inner cylindrical member 10 and the intermediate metal member 20 in a molding die (not shown), thereby forming the inner cylindrical member 10 as shown in FIGS. And a rubber vulcanized molded product M which is an intermediate product including the intermediate fitting 20.

As shown in FIGS. 9 and 10, the outer cylinder 50 has a length substantially the same as that of the intermediate metal 20 in the axial direction.
Before press-fitting, a cylindrical metal fitting whose inner diameter is slightly smaller than the outer diameter of the intermediate metal fitting 20 is provided with an annular flange portion 51 extending radially outward on one end side. A boundary portion 51a between the flange portion 51 and the cylindrical portion is rounded in an arc-shaped cross section. In the outer peripheral edge of the flange portion 51, a notch portion 5 for positioning, which is cut out in a pair of arc shapes at radially opposed positions.
2 is provided, and at a position orthogonal to the notch 52,
A second notch 53, which is narrower than the notch 52 cut out in a substantially rectangular shape, is provided. A thin rubber elastic seal portion 54 is provided on the outer peripheral surface of the outer tube fitting 50 and inside the flange portion 51. Furthermore, the outer cylinder fitting 50
The outer peripheral surface of the flange portion 51 is provided with four stopper portions 55 each having a substantially triangular cross section in the circumferential direction.

The rubber elastic body sealing portion 54 and the stopper portion 55 are integrally formed by setting the outer cylinder fitting 50 in a mold and performing vulcanization molding. This outer tube fitting 5
As shown in FIG. 11, the rubber vulcanized molded product M is press-fitted from the flange portion 51 side to the stopper portion 55.
Is aligned with the other end (the upper end in the figure) and integrally attached to the rubber vulcanization molded product M to form a liquid-enclosed vibration isolator.

For assembling the outer cylinder fitting 50 to the rubber vulcanization molding M, the outer cylinder fitting 50 and the rubber vulcanization molding M are immersed in a liquid tank filled with liquid, M is press-fitted into the outer cylinder fitting 50 and the first and second recesses 33 and 34 are filled with liquid, whereby the outer cylinder fitting 50 is fixed to the outer periphery of the rubber vulcanized molded product M. A liquid filled type vibration damping device is obtained. As a result, the first elastic body 30
The second recesses 33 and 34 are liquid-tightly closed and formed as a pair of liquid chambers K filled with liquid. The liquid is also sealed in the groove portion 42 of the outer rubber portion 41 of the rubber elastic body 30, and is formed as an orifice passage 45 for communicating between the two liquid chambers K. Here, in press-fitting the rubber vulcanized molded product M into the outer cylinder fitting 50, the seal lip 43 a is pushed outside the ring portion 21 a and crushed in the ring portion 21 a on the press-fitting destination side of the intermediate fitting 20, which is a problem. In addition, since the diameter of the ring portion 21b on the rear side of the press-fitting is slightly smaller than that of the outer tube fitting 50, the press-fitting is not increased,
And a seal lip 44a of the second rubber elastic body seal portion 44
Is not damaged by press-fitting, and good sealing properties are secured.

As shown in FIG. 11, the liquid filled type vibration damping device formed as described above has the stopper portion 55 on the upper side and the inner cylindrical metal fitting 10 turned up and down. The outer cylinder fitting 50 is press-fitted and fixed to the cylindrical mounting member 61 of the sub-frame of the vehicle in a state where the 33 is arranged on the front side and the second recess 34 is arranged on the rear side. Tubular mounting member 61
Has a flange portion 62 on one end side in contact with the flange portion 51 of the outer cylinder fitting 50, and a waste stopper portion 63 on the other end side. The liquid-filled type vibration damping device fixed to the mounting member 61 of the sub-frame includes a disk-shaped support plate member 6.
A bolt 65 is inserted into the shaft hole of the inner cylinder fitting 10 from one end side 10a through 4 and screwed to the vehicle body side member 66 to be fixed. That is, the liquid-filled type vibration damping device has a long first diaphragm portion 36 and a long fourth diaphragm portion 39 which are arranged diagonally across the inner cylinder fitting 10.
Are arranged in accordance with the direction of the diagonal vibration input input from the sub-frame in acceleration and deceleration of the vehicle.

In this liquid filled type vibration damping device, the vibration is reduced by the rubber elastic body 30 in response to the vibration input from an oblique direction according to the acceleration and deceleration of the vehicle, and the transmission of the vibration to the vehicle body side is suppressed. can do. Also, excessive vibration input can be suppressed by the first and second protrusions 12 and 13 of the stopper member 11 fixed to the inner cylinder fitting 10. Further, the first diaphragm portion 36 and the fourth diaphragm portion 39 having a long length at one diagonal position of the rubber elastic body 30 at the one diagonal position with respect to the inner metal fitting 10 are moved obliquely in accordance with the acceleration and deceleration of the vehicle. , The free length of the elastic body in this direction is increased. Therefore, the tensile strain of the first and fourth diaphragm portions 36 and 39 due to the vibration input is calculated as 8
It can be reduced to about 0%, and the durability of the diaphragm portions 36 and 39 can be increased.

As described above, in the liquid filled type vibration damping device of the present embodiment, the intermediate metal fitting 2 of the outer cylindrical metal fitting 50 is used.
Since the fixing to the zero side is performed by press-fitting the rubber vulcanized molded product M, the drawing process is not required, and the production of the liquid-sealed type vibration damping device is simplified, and the production cost can be reduced. When the rubber vulcanized molded article M is press-fitted into the inner peripheral side of the outer cylinder fitting 50, the ring 21a on the press-fitting side of the intermediate fitting 20 is pressed.
Is slightly larger than the inner diameter of the outer cylinder fitting 50, so that the ring portion 21a is securely fixed to the outer cylinder fitting 50 at this portion, and the ring portion 21a is fixed to the sealing lip 43a of the first rubber elastic body sealing portion 43. Sealability is ensured. On the other hand, the outer diameter of the ring portion 21b after the press-fitting of the intermediate fitting 20 is made slightly smaller than the inner diameter of the outer cylindrical fitting 50, and the thin second rubber elastic body sealing portion 44 is formed on the outer periphery of the rear ring portion 21b. The press-fitting of the rubber vulcanized molded product M is performed smoothly, and the press-fitting does not become unduly high. In addition, since the second rubber elastic body seal portion 44 is appropriately compressed, the seal lip 44a is not damaged, and the seal lip 44a ensures the sealing performance with the outer tube fitting 50.

In the above embodiment, the position of the projecting portion of the stopper member 11 provided on the inner cylinder is shifted in the axial direction, but it may be provided at the same position in the axial direction. Further, the stopper member may be omitted as necessary. Further, the number of connecting portions of the intermediate metal fittings is not limited to two, and the number of windows associated therewith is not limited to two. Further, the position and shape of the side wall of the rubber elastic body are not limited to those described in the above embodiment. In addition, the liquid-filled type vibration damping device shown in the above embodiment is an example, and can be implemented in various forms without departing from the gist of the present invention.

[0028]

According to the first aspect of the present invention, since the fixing of the outer cylindrical member to the intermediate metal member is performed by press-fitting the intermediate metal member, the manufacture of the liquid-filled type vibration damping device is simplified, and the manufacturing cost is reduced. Can be reduced. Further, since the press fitting of the intermediate fitting into the outer cylindrical fitting is performed smoothly and the press input is not unduly increased, the deformation of the intermediate fitting can be prevented and the second fitting can be prevented.
Damage to the rubber elastic body sealing portion can also be prevented, and proper sealing performance with the outer tube fitting can be ensured. Further, by providing two annular seal lips on the inner side in the axial direction of the rubber elastic body seal portion, the sealability is further improved.

[Brief description of the drawings]

FIG. 1 is a sectional view schematically showing a liquid-filled type vibration damping device according to an embodiment of the present invention, taken along a line II in FIG.

FIG. 2 schematically shows a liquid filled type vibration damping device, II in FIG.
It is sectional drawing in the II line direction.

FIG. 3 is a plan view schematically showing a liquid filled type vibration damping device.

FIG. 4 is a plan view showing a rubber vulcanized molded product M which is an intermediate product of the liquid filled type vibration damping device.

5 is a cross-sectional view of the rubber vulcanized molded product M taken along the line VV in FIG.

6 is a cross-sectional view of the rubber vulcanized molded product M, taken along the line VI-VI in FIG.

FIG. 7 is a cross-sectional view of the rubber vulcanized molded article M, taken along the line VII-VI of FIG.
It is sectional drawing of the I-line direction.

FIG. 8 is a partial cross-sectional view showing in detail a rubber elastic body sealing portion in a ring portion of the intermediate metal fitting.

FIG. 9 is a plan view showing the outer tube fitting.

FIG. 10 is a cross-sectional view taken along the line XX of FIG. 9 showing the outer cylinder fitting.

FIG. 11 is a cross-sectional view showing a state in which the liquid-filled type vibration damping device is assembled to a vehicle.

FIG. 12 is a longitudinal sectional view showing a liquid-filled type vibration damping device as a reference example.

FIG. 13 is a partial cross-sectional view showing in detail a rubber elastic body sealing portion provided on a ring portion of an intermediate fitting in the reference example.

FIG. 14 is a view showing a conventional liquid-filled type vibration damping device.
6 is a sectional view taken along line XIV-XIV of FIG.

FIG. 15 is a cross-sectional view of the liquid-filled type vibration damping device shown in FIG.
It is sectional drawing of the XV line direction.

FIG. 16 is an XVI of FIG. 15 showing the liquid filled type vibration damping device.
It is sectional drawing of the -XVI line direction.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Inner cylinder fitting, 11 ... Stopper member, 20 ... Intermediate fitting, 21a, 21b ... Ring part, 22 ... Connection part, 25 ...
Window portion, 30 rubber elastic body, 31 first concave portion, 32 second concave portion, 33 first concave portion, 34 second concave portion, 35 arm portion, 36 to 39 first to fourth diaphragms Part 41 outer rubber part 43 first rubber elastic seal part 43a seal lip 44 second rubber elastic seal part 44a
Seal lip, 45: orifice passage, 50: outer cylinder, 51: flange, 55: stopper, K: liquid chamber.

Claims (2)

[Claims] 1. An inner cylindrical fitting, a pair of ring portions disposed at an outer side of the inner cylindrical fitting and spaced apart from each other at an axial end, and a connecting portion for integrally connecting the pair of ring portions. A cylindrical intermediate metal fitting having a window that opens between the ring part and the connecting part; and a concave part that elastically connects the intermediate metal fitting and the inner cylindrical metal fitting and that opens to the window part. A rubber elastic body, a cylindrical portion, and a flange portion extending radially outward at one axial end of the cylindrical portion, the intermediate metal fitting being connected to the inner cylindrical metal fitting by the rubber elastic body. An outer cylinder fitting press-fitted from the flange part side to the inner peripheral side of the cylinder part and fixed to the cylinder part, forming a liquid chamber in the concave part by liquid-tightly closing a gap between the intermediate fitting and the intermediate metal fitting; A liquid-filled vibration damping device comprising: a press-fitting of the intermediate fitting before the intermediate fitting is press-fitted into the outer cylinder fitting. The outer diameter of the ring portion on the side is slightly larger than the inner diameter of the outer cylindrical fitting, and the inner end side in the axial direction is reduced in diameter, and an annular shape extending along the circumferential direction on the outer periphery of the reduced diameter portion. The outer diameter of the ring portion after the press-fitting of the intermediate metal fitting is slightly smaller than the inner diameter of the outer cylindrical metal fitting, and the first rubber elastic body sealing portion is provided. An annular second extending circumferentially around the outer periphery
A liquid filled type vibration damping device comprising a rubber elastic body sealing portion. 2. The first and second rubber elastic body seal portions are provided with two annular seal lips extending in a circumferential direction and slightly projecting in a radial direction. Item 2. A liquid-filled type vibration damping device according to Item 1.