JP2009127780A - Liquid filled vibration absorbing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid filled vibration absorbing device wherein the insertable property of a partitioning member is improved and the dispersion of vibration absorbing property due to the deformation of the partition member is reduced. <P>SOLUTION: Flange portions 41-43 have outer diameters gradually larger as located to the lower side. An lower end face 21a of an cylinder portion 21 of a rubber elastic body 2 receives the upper face of the lowest flange portion 43 out of the flange portions 41-43. On the inner peripheral face of the cylinder portion 21 of the rubber elastic body 2, at its portions corresponding to the other flange portions 41, 42 than the lowest flange portion 43 out of the flange portion 41, 43, annular stepped portions 23, 24 are formed whose receiving faces 23a, 24a corresponding to the upper faces of the flange portions 41, 42 receive the upper faces of the flange portions 41, 42. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a liquid-filled vibration isolator.

Conventionally, an engine mount for automobiles is well known as this type of vibration isolator (see, for example, Patent Document 1). The basic structure is that a rubber elastic body is interposed between the engine-side coupling fitting that is a supported body and the vehicle body-side cylindrical fitting, and the volume changes as the rubber elastic body is deformed. A liquid chamber is formed between the two metal fittings, the liquid chamber is partitioned into a pressure receiving chamber and an equilibrium chamber by a partition member, and an orifice passage is provided for communicating the pressure receiving chamber and the equilibrium chamber. When the liquid flows through the orifice passage, engine vibration in a predetermined frequency region can be effectively absorbed and attenuated.
JP 2005-226792 A

  FIG. 7 shows an example of the engine mount. In this example, the rubber elastic body 102 includes a rubber elastic body main body 120 extending obliquely downward from the coupling fitting 101 and a cylindrical portion 121 extending downward from the rubber elastic body main body 120, and the partition member 104 is a cylinder. In addition to having a portion 140, two first to third flange portions 141 to 143 are formed on the outer peripheral surface of the cylindrical portion 140 to form two-stage groove portions 144 and 145 that open radially outwardly, Further, the groove portions 144 and 145 are surrounded by the cylindrical portion 121 from the outside in the radial direction to form a double spiral orifice passage P ′. And the partition member 104 is inserted in the inside of the cylinder part 121 from the downward direction.

  Further, the inner diameter of the cylindrical portion 121 is enlarged to form a stepped portion 121a. The stepped portion 121a receives the upper surface of the first flange portion 141, whereby the rubber elastic body 102 and the first flange portion 141 are connected. The gap is sealed. In addition, the lower end surface 121 b of the cylindrical portion 121 receives the upper surface of the third flange portion 143, thereby sealing between the rubber elastic body 102 and the third flange portion 143. On the other hand, the outer peripheral surface of the second flange portion 142 is in intimate contact with the inner peripheral surface of the cylindrical portion 121, thereby sealing between the rubber elastic body 102 and the second flange portion 142.

  As described above, since the outer peripheral surface of the second flange portion 142 is closely attached to the inner peripheral surface of the cylindrical portion 121 without any gap, the insertion property of the partition member 104 may be deteriorated. 104, in particular, the second flange portion 142 may be deformed, and the vibration isolation characteristics may vary.

  The present invention has been made in view of such points, and an object of the present invention is to improve the insertability of the partition member in the liquid-filled vibration isolator, and the vibration isolation characteristics vary due to deformation of the partition member. It is to reduce this.

  According to a first aspect of the present invention, there is provided a coupling metal connected to the supported body side, a support metal that supports the connection metal via a rubber elastic body, and the both metal fittings so that the volume changes with deformation of the rubber elastic body. A liquid elastic body formed between the connecting metal fitting, and a rubber elastic body extending obliquely downward from the coupling metal, and a rubber member. And a cylindrical portion into which the partition member is inserted. The partition member has a cylindrical portion, and three or more flange portions are provided on the outer peripheral surface of the cylindrical portion of the partition member. By forming, a plurality of grooves that open radially outward are formed, and the grooves are surrounded by a cylindrical portion of the rubber elastic body from the radially outer side so that the pressure receiving chamber and the equilibrium chamber communicate with each other. A liquid-filled vibration isolator with an orifice passage. The flange portion has a larger outer diameter toward the lower flange portion, and the cylindrical portion of the rubber elastic body receives the upper surface of the lowermost flange portion of the flange portions at the lower end surface, On the inner peripheral surface of the cylindrical portion of the rubber elastic body, a portion of the flange portion corresponding to each flange portion other than the lowermost flange portion is provided with a receiving surface corresponding to the upper surface of the flange portion. An annular step portion for receiving the upper surface is formed.

  Thereby, at the lower end surface of the cylindrical portion of the rubber elastic body, the upper surface of the lowermost flange portion of the flange portion is received, and at the receiving surface of each step portion, each of the flange portions other than the lowermost flange portion. By receiving the upper surface of the flange portion, the rubber elastic body and the flange portion are respectively sealed. Therefore, it is not necessary to bring the outer peripheral surface of the flange portion into intimate contact with the inner peripheral surface of the cylindrical portion of the rubber elastic body, thereby improving the insertability of the partition member and reducing variation in the vibration isolation characteristics due to deformation of the partition member. Is possible.

  According to a second invention, in the first invention, each step portion has an inner diameter larger than an outer diameter of a flange portion received by the receiving surface.

  Thereby, since each step part has an inner diameter larger than the outer diameter of the flange part received on the receiving surface, the outer peripheral surface of the flange part is not in close contact with the inner peripheral surface of the cylindrical part of the rubber elastic body. Therefore, it is possible to improve the insertability of the partition member and reduce the variation in the vibration isolation characteristics due to the deformation of the partition member.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the lower end surface of the cylindrical portion of the rubber elastic body and the receiving surface of each stepped portion have an annular shape that seals between the upper surface of the flange portion. The seal protrusions are formed respectively.

  As a result, since the annular sealing protrusions for sealing the space between the lower surface of the cylindrical portion of the rubber elastic body and the upper surface of the flange portion are formed on the receiving surface of each stepped portion, the rubber elastic body The sealing performance between the flange portion and the flange portion can be improved.

  According to a fourth aspect of the present invention, in any one of the first to third aspects, between the adjacent flange portions, a partition portion that partitions a communication path that communicates adjacent groove portions is formed. The inner peripheral surface of each step portion is formed with a hole for receiving the partition portion at a portion corresponding to the partition portion.

  Thereby, between the adjacent flange portions, a partition portion for partitioning the communication path communicating the adjacent groove portions is formed, and the partition portion is provided on the inner peripheral surface of each step portion at a portion corresponding to the partition portion. Since the receiving hole is formed, the sealing property between the rubber elastic body and the partition can be improved.

  According to the present invention, the lower end surface of the cylindrical portion of the rubber elastic body receives the upper surface of the lowermost flange portion of the flange portions, and the lowermost flange portion of the flange portions at the receiving surface of each step portion. By receiving the upper surface of each of the other flange portions, the gap between the rubber elastic body and the flange portion is sealed. Therefore, it is not necessary to bring the outer peripheral surface of the flange portion into intimate contact with the inner peripheral surface of the cylindrical portion of the rubber elastic body, thereby improving the insertability of the partition member and reducing variation in the vibration isolation characteristics due to deformation of the partition member. Is possible.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(Embodiment 1)
-Overall structure of mount-
1 and 2 show an automobile engine mount A which is an embodiment of a liquid-filled vibration-proof support device according to the present invention. The engine mount A includes an automobile engine and a transmission (not shown) The power plant is interposed between the power plant and the vehicle body to support the static load of the power plant and absorb or attenuate the vibration from the power plant to suppress transmission to the vehicle body. It has a function.

  The engine mount A of this embodiment has a substantially columnar connection fitting 1 attached to a power plant as a supported body via a bracket (not shown) and the like, and a cylindrical shape that supports this from below via a rubber elastic body 2. And a pair of legs 30, 30 welded to the front and rear sides (hereinafter simply referred to as the front and rear sides) of the automobile on the lower outer periphery of the support bracket 3, respectively. It is supposed to be fixed. The support fitting 3 also functions as a case of the mount A together with a stopper fitting 8 described later.

  As shown in FIG. 2, the connecting metal fitting 1 has a flange portion 10 at an intermediate portion in the axis Z direction, a tapered portion 11 that is sunk downward on the lower side, and a shaft portion 12 on the upper side. , Each is formed. A bracket on the power plant side is attached to the upper end surface of the shaft portion 12, and a bolt (not shown) is screwed into the bolt hole 12a. In the illustrated example, the collar portion 10 has an annular shape centering on the axis Z, and annular stopper rubbers 6 and 7 are provided on the upper surface and the outer peripheral surface, respectively.

  Furthermore, a passage 13 is formed inside the connecting fitting 1 so as to extend downward from the lower end of the bolt hole 12 a and open to the tip of the tapered portion 11. The passage 13 is smaller in diameter than the bolt hole 12a and communicates with the bolt hole 12a through an upwardly expanding taper portion, and serves as a passage for supplying liquid to the liquid chamber F as described later. A sealing material (not shown) such as a steel ball is driven into the upper end of the passage 13 to seal the liquid chamber F.

  The rubber elastic body 2 is vulcanized and bonded at its upper portion to cover the lower taper portion 11 of the connecting metal fitting 1, and is thickened umbrella-shaped portion 20 (rubber elastic) extending obliquely downward while expanding radially therefrom. Body body) and a cylindrical portion 21 extending downward continuously from the lower end of the umbrella-shaped portion 20, and the cylindrical portion 21 is fixed to the inner periphery of the support fitting 3. That is, the support fitting 3 has a double structure composed of an inner cylinder 31 and an outer cylinder 32 in the illustrated example, and the outer peripheral surface of the cylindrical portion 21 of the rubber elastic body 2 is the inner peripheral surface of the inner cylinder 31. While being bonded and fixed, the outer peripheral surface of the inner cylinder 31 is in surface contact with the inner peripheral surface of the outer cylinder 32.

  Further, the cylindrical portion 21 of the rubber elastic body 2 has an inner diameter enlarged on the lower side to form annular step portions 23 and 24, and the orifice plate 4 from below as a receiving portion of these step portions 23 and 24. Is inserted and a rubber diaphragm 5 is disposed so as to cover the orifice plate 4 from below. The diaphragm 5 is formed with a thick portion 50 so as to go around its opening edge, and a reinforcing member 51 is embedded therein. The thick-walled portion 50 thus reinforced is superimposed on the lower surface of the orifice board 4 in a liquid-tight manner, and is caulked from below by a flange formed inwardly at the lower end of the inner cylinder 31 of the support fitting 3.

  A liquid chamber F in which a liquid is sealed is formed inside the rubber elastic body 2. The liquid chamber F is vertically divided by a metal orifice plate 4 (partition member), the upper side thereof is a pressure receiving chamber f1, and the lower side, that is, the portion partitioned by the orifice plate 4 and the diaphragm 5 is It becomes the equilibrium chamber f2. When the vibration from the power plant is input and the rubber elastic body 2 is deformed, the volume of the pressure receiving chamber f1 mainly changes, and the liquid flows between the equilibrium chamber f2 via the orifice passage P. As the liquid flows in and out, the diaphragm 5 is deformed, and the volume of the equilibrium chamber f2 changes.

  That is, the orifice plate 4 has a covered cylindrical cylindrical portion 40 disposed coaxially with the cylindrical portion 21 of the rubber elastic body 2, and three upper and lower plates extending radially outward on the outer peripheral surface of the cylindrical portion 40. The annular first to third flange portions 41 to 43 are formed over the entire circumference, so that two upper and lower annular groove portions 44 and 45 that are opened radially outward are formed over the entire circumference. Has been. The groove portions 44 and 45 are surrounded by the cylindrical portion 21 from the outside in the radial direction, thereby forming a double spiral orifice passage P communicating with the pressure receiving chamber f1 and the equilibrium chamber f2. One end of the orifice passage P faces the pressure receiving chamber f1 at the opening 41a (see FIG. 4) on the upper surface of the first flange portion 41, and the other end from the opening 43a (see FIG. 4) opened on the lower surface of the third flange portion 43. It faces the equilibrium chamber f2. The orifice passage P is tuned to a vibration having a relatively low frequency and a large amplitude. Note that the second flange portion 42 is partially cut away to communicate the upper and lower groove portions 44 and 45 (adjacent groove portions) (see FIG. 4).

  On the other hand, a stopper fitting 8 having a cylindrical shape substantially the same diameter as the outer cylinder 32 is attached to the upper end of the support fitting 3 so as to surround the upper portion of the mount A such as the umbrella-shaped portion 20 of the rubber elastic body 2. ing. A flange projecting outward is formed at the lower end of the stopper fitting 8, and this flange is placed on the upper surface of the flange formed outward at the upper end of the inner cylinder 31 inside thereof. It is caulked by a U-shaped part formed at the upper end of the.

  The stopper fitting 8 regulates the relative displacement of the connecting fitting 1 in the front-rear direction by coming into contact with the stopper rubber 7 of the collar portion 10. A flange extending toward the inner peripheral side is formed at the upper end of the stopper fitting 8 so as to surround the shaft portion 12 of the connecting fitting 1, and the lower surface of this flange contacts the stopper rubber 6 on the upper surface of the collar portion 10. As a result, the upward displacement of the connection fitting 1 is restricted. The upper surface of the flange is in contact with an unillustrated bracket on the engine side so that the upward movement is restricted, in other words, the rubber so as to restrict the downward relative displacement of the connecting fitting 1. A layer 80 is provided.

  FIG. 2 shows a state where no static load of the power plant is applied to the engine mount A, and the clearance between the stopper rubber 6 on the top surface of the collar portion 10 and the flange on the top end of the stopper fitting 8 is small. In the 1G state where the mount A is attached to the automobile to support the power plant and the static load is applied, the rubber elastic body 2 is bent and the connecting fitting 1 is displaced downward, so that the gap is increased.

-Configuration of rubber elastic body and orifice board-
Hereinafter, the structure of the rubber elastic body 2 and the orifice board 4 will be described in detail.

  As shown in FIGS. 2 and 4, the first to third flange portions 41 to 43 of the orifice board 4 have a larger outer diameter as the lower flange portion is located. That is, the outer diameter is the third flange portion 43, the second flange portion 42, and the first flange portion 41 in order from the largest to the smallest.

  Between adjacent flange portions 41, 42; 42, 43, partition portions 46, 47 (shown only in FIG. 4) for partitioning the communication passage Q communicating with the upper and lower groove portions 44, 45 are formed. . That is, the upper partition 46 is provided between the first and second flange portions 41 and 42, and the lower partition 47 is provided between the second and third flange portions. The upper partitioning portion 46 is a substantially plate-like one that extends obliquely downward from the first flange portion 41 and is connected to one circumferential end of the second flange portion 42, and the upper surface 46 a has the same diameter as the upper surface of the first flange portion 41. The direction outer side surface 46 b is flush with the outer peripheral surface of the second flange portion 42. The lower partition portion 47 has a substantially trapezoidal cross section that connects the other circumferential end of the second flange portion 42 and the third flange portion 43, and the upper surface 47 a is in the radial direction with the upper surface of the second flange portion 42. The outer side surface 47 b is flush with the outer peripheral surface of the third flange portion 43, and the inclined surface 47 c facing the upper partition portion 46 is substantially parallel to the upper partition portion 46.

  2 to 5, the cylindrical portion 21 of the rubber elastic body 2 receives the outer peripheral side of the upper surface of the lowermost third flange portion 43 among the flange portions 41 to 43 at the lower end surface 21a. A cylindrical thin portion 22 extending downward therefrom is formed on the outer peripheral side of the lower end surface 21a of the cylindrical portion 21. The thin portion 22 has an inner diameter slightly larger than the outer diameter of the third flange portion 43. Thus, a gap is provided between the inner peripheral surface of the thin portion 22 and the outer peripheral surface of the third flange portion 43. In FIG. 5, only the cylindrical portion 21 of the rubber elastic body 2 is shown for easy understanding of the drawing.

  On the inner peripheral surface of the cylindrical portion 21, a portion of the flange portions 41 to 43 corresponding to the flange portions 41 and 42 other than the third flange portion 43 has a ceiling surface 23 a corresponding to the upper surface of the flange portions 41 and 42. , 24a (receiving surface), and annular step portions 23, 24 having two upper and lower steps (the same number as the groove portions 44, 45) that receive the outer peripheral side of the upper surface of the flange portions 41, 42 are formed over the entire circumference. . That is, the upper stage portion 23 receives the upper surface of the first flange portion 41 at the ceiling surface 23a, and the lower step portion 24 receives the upper surface of the second flange portion 42 at the ceiling surface 24a.

  Each step part 23 and 24 has a slightly larger inner diameter than the outer diameters of the flange parts 41 and 42 received by the ceiling surfaces 23a and 24a. That is, the inner diameter of the upper step portion 23 is slightly larger than the outer diameter of the first flange portion 41, and the inner diameter of the lower step portion 24 is slightly larger than the outer diameter of the second flange portion 42. Thus, a gap is provided between the inner peripheral surface of the cylindrical portion 21 and the outer peripheral surfaces of the flange portions 41 and 42.

  An annular rubber seal protrusion that protrudes downward and seals between the upper surfaces of the flange portions 41 to 43 on the lower end surface 21a of the cylindrical portion 21 and the ceiling surfaces 23a and 24a of the step portions 23 and 24. A strip 25 (only FIG. 3 is shown) is formed over the entire circumference. Then, the orifice plate 4 is caulked by the flange at the lower end of the inner cylinder 31 together with the diaphragm 5, so that the seal protrusions 25 are pressed against the upper surfaces of the flange portions 41 to 43 and crushed. As a result, the ceiling surface 23a and the upper surface of the first flange portion 41 of the upper step portion 23, the upper surface of the ceiling surface 24a and the second flange portion 42 of the lower step portion 24, and the lower end surface 21a and the third flange portion 43 of the cylindrical portion 21 are obtained. The upper surfaces are in close contact with each other. Thus, the liquid leaks from between the rubber elastic body 2 and the first and second flange portions 41 and 42 into the engine mount A, or from between the rubber elastic body 2 and the third flange portion 43 to the engine mount A. It prevents leakage to the outside.

  Holes 23c, 24c for receiving radially outer ends of the partition portions 46, 47 are formed in the inner peripheral surfaces 23b, 24b of the step portions 23, 24 at portions corresponding to the partition portions 46, 47 of the orifice plate 4. Has been. That is, the upper peripheral portion 23 b of the upper step portion 23 has an upper hole portion 23 c corresponding to the upper partition portion 46, and the inner peripheral surface 24 b of the lower step portion 24 has a lower portion corresponding to the lower partition portion 47. Side holes 24c are provided respectively. The upper hole portion 23c is formed in a substantially trapezoidal shape so as to conform to the shape of the radially outer end portion of the upper partition portion 46, and the ceiling surface 23d has the ceiling surface 23a of the upper step portion 23 and the radially outer surface 23e. Are flush with the inner peripheral surface 24b of the lower step portion 24, respectively. In the upper hole 23c, the ceiling surface 23d is in close contact with the upper surface 46a of the upper partition 46, and the inclined surface 23f is in close contact with the radially outer end of the inclined surface 46c of the upper partition 46. On the other hand, the lower hole portion 24c is formed in a substantially trapezoidal shape so as to conform to the shape of the radially outer end portion of the lower partition portion 47, and the ceiling surface 24d has a diameter equal to that of the ceiling surface 24a of the lower step portion 24. The direction outer side surface 24e is flush with the inner peripheral surface of the thin portion 22 respectively. The lower hole 24c has a ceiling surface 24d having a radially outer end of the upper surface 47a of the lower partition 47 and an inclined surface 24f having a radially outer end of the inclined surface 47c of the lower partition 47. Each is close. Thus, the liquid is prevented from leaking from between the rubber elastic body 2 and the partition portions 46 and 47.

  Further, a portion defined by the cylindrical portion 21 of the rubber elastic body 2 and the cylindrical portion 40 and the partition portions 46 and 47 of the orifice plate 4 becomes a communication path Q, and this communication path Q constitutes a part of the orifice path P. is doing.

  Further, the orifice plate 4 has the first to third flange portions 41 to 43 arranged at equal intervals in the vertical direction, so that the upper groove portion 44 and the lower groove portion 45 have the same height. The cylindrical portion 40 has a smaller outer diameter at a portion corresponding to the upper groove portion 44 than at a portion corresponding to the lower groove portion 45 so that the sectional area of the orifice passage P becomes a constant size.

-Effect-
As described above, according to the present embodiment, the lower surface 21a of the cylindrical portion 21 of the rubber elastic body 2 receives the upper surface of the lowermost third flange portion 43 among the flange portions 41 to 43, and receives the step portions 23, By receiving the upper surfaces of the flange portions 41 and 42 other than the third flange portion 43 among the flange portions 41 to 43 at the 24 ceiling surfaces 23a and 24a, between the rubber elastic body 2 and the flange portions 41 to 43 Each is sealed. Therefore, the outer peripheral surfaces of the flange portions 41 to 43 need not be in close contact with the inner peripheral surface of the cylindrical portion 21 of the rubber elastic body 2. Moreover, since each step part 23 and 24 has an internal diameter larger than the outer diameter of the flange parts 41 and 42 received in the ceiling surfaces 23a and 24a, the outer peripheral surface of the flange parts 41-43 is the rubber elastic body 2. It is not in close contact with the inner peripheral surface of the cylindrical portion 21. From the above, it is possible to improve the insertability of the orifice board 4 and to reduce the variation in the vibration isolation characteristics due to the deformation of the orifice board 4.

  Further, an annular sealing protrusion that seals between the lower end surface 21 a of the cylindrical portion 21 of the rubber elastic body 2 and the ceiling surfaces 23 a and 24 a of the step portions 23 and 24 and the upper surfaces of the flange portions 41 to 43. Since 25 is formed, the sealing performance between the rubber elastic body 2 and the flange portions 41 to 43 can be improved.

  Furthermore, partition portions 46 and 47 for partitioning the communication path Q communicating with the adjacent groove portions 44 and 45 are formed between the adjacent flange portions 41 and 42; 42 and 43, respectively. Since the holes 23c and 24c for receiving the partition portions 46 and 47 are formed in the inner peripheral surfaces 23b and 24b of the inner peripheral surfaces 23b and 24b in portions corresponding to the partition portions 46 and 47, the rubber elastic body 2 and the partition portions 46 and 47 The sealing performance between the two can be improved.

(Embodiment 2)
In the present embodiment, the configuration of the orifice passage P is different from that of the first embodiment. That is, as shown in FIG. 6, the cylindrical portion 40 of the orifice board 4 has the same outer diameter in the portion corresponding to the upper groove portion 44 and the portion corresponding to the lower groove portion 45. Further, the first to third flange portions 41 to 43 are arranged vertically so that the upper groove portion 44 is higher in height than the lower groove portion 45, so that the sectional area of the orifice passage P is constant. It is a size.

  According to the present embodiment, the same operation and effect as in the first embodiment can be obtained.

(Other embodiments)
In each of the embodiments described above, the orifice plate 4 is made of metal, but is not limited to this, and may be made of resin, for example.

  In each of the above-described embodiments, the three flange portions 41 to 43 are formed on the outer periphery of the cylindrical portion 40 of the orifice board 4 to form the two-stage groove portions 44 and 45, and these groove portions 44 and 45 are formed as rubber elastic bodies. The double spiral orifice passage P is formed by being surrounded by two cylindrical portions 21. However, three or more groove portions are formed by forming four or more flange portions, and these groove portions are formed in the cylindrical portion. By enclosing with 21, a triple or more spiral orifice passage P may be formed.

  In each said embodiment, although each step part 23 and 24 has a slightly larger internal diameter than the outer diameter of the flange parts 41 and 42 received in the ceiling surfaces 23a and 24a, in the ceiling surfaces 23a and 24a, The outer diameter and inner diameter of the receiving flange portions 41 and 42 may be substantially the same size. However, the former is desirable in order to improve the insertability of the orifice board 4 or to reduce variations in the vibration isolation characteristics due to the deformation of the orifice board 4.

  In each said embodiment, although the protrusion part 25 for a seal | sticker is each formed in the lower end surface 21a of the cylindrical part 21 of the rubber elastic body 2, and the ceiling surfaces 23a and 24a of each step part 23 and 24, they are formed. You don't have to. However, the former is desirable to surely prevent the liquid from leaking.

  In each of the embodiments described above, the holes 23c and 24c are formed on the inner peripheral surfaces 23b and 24b of the stepped portions 23 and 24, but they may not be formed. In this case, for example, the radially outer surface 46b of the upper partition 46 is the outer peripheral surface of the first flange portion 41, and the radially outer surface 47b of the lower partition 47 is the outer peripheral surface of the second flange portion 42, respectively. Make it one.

  The present invention is not limited to the embodiments, and can be implemented in various other forms without departing from the spirit or main features thereof.

  As described above, the above-described embodiment is merely an example in all respects and should not be interpreted in a limited manner. The scope of the present invention is defined by the claims, and is not limited by the specification. Further, all modifications and changes belonging to the equivalent scope of the claims are within the scope of the present invention.

  As described above, the liquid-filled vibration isolator according to the present invention can be applied to an application for improving the insertion property of the partition member and reducing the variation in the vibration isolation characteristics due to the deformation of the partition member.

It is a top view of the liquid enclosure type vibration proof support apparatus which concerns on embodiment of this invention. It is the II-II sectional view taken on the line of FIG. FIG. 3 is a view corresponding to FIG. 2 showing a liquid-filled vibration-proof support device in a state where an orifice board and a diaphragm are not attached. It is the perspective view which looked at the orifice board from the upper side. It is the perspective view which looked at the cylindrical part of the rubber elastic body from the lower side. FIG. 9 is a view corresponding to FIG. 2 showing a modification of the liquid-filled vibration-proof support device. It is sectional drawing of the conventional liquid enclosure type vibration isolator.

Explanation of symbols

A Engine mount (liquid-filled vibration isolator)
F Liquid chamber f1 Pressure receiving chamber f2 Equilibrium chamber P Orifice passage Q Communication passage 1 Connecting metal fitting 2 Rubber elastic body 20 Umbrella-shaped part (rubber elastic body)
21 Cylindrical part (tube part)
21a Lower end surface 23, 24 Step 23a, 24a Ceiling surface (receiving surface)
23b, 24b Inner peripheral surfaces 23c, 24c Hole 25 Sealing protrusion 3 Support bracket 4 Orifice panel (partition member)
40 Cylindrical part (cylinder part)
41-43 1st-3rd flange part 44,45 Groove part 46,47 Partition part

Claims (4)

A coupling metal connected to the supported body side, a support metal that supports the connection metal via a rubber elastic body, and a liquid formed between the metal fittings so that the volume changes with deformation of the rubber elastic body. And a partition member that partitions the interior of the liquid chamber into a pressure receiving chamber and an equilibrium chamber, and the rubber elastic body extends obliquely downward from the coupling metal, and downward from the rubber elastic body main body. And a cylindrical portion into which the partition member is inserted. The partition member has a cylindrical portion, and three or more flange portions are formed on the outer peripheral surface of the cylindrical portion of the partition member. A plurality of groove portions that are opened outward in the direction are formed, and the groove portions are surrounded by the cylindrical portion of the rubber elastic body from the radially outer side, so that a spiral orifice passage that communicates the pressure receiving chamber and the equilibrium chamber is formed. A liquid-filled vibration isolator,
The outer diameter of the flange portion is larger toward the lower flange portion,
The cylindrical portion of the rubber elastic body receives the upper surface of the lowermost flange portion of the flange portions at the lower end surface,
On the inner peripheral surface of the cylindrical portion of the rubber elastic body, the flange portion is formed on a portion corresponding to each flange portion other than the lowermost flange portion of the flange portion at a receiving surface corresponding to the upper surface of the flange portion. A liquid-filled vibration isolator having an annular step receiving the upper surface of the liquid. The liquid-filled vibration isolator according to claim 1,
Each of the step portions has an inner diameter larger than the outer diameter of the flange portion received by the receiving surface thereof. The liquid-filled vibration isolator according to claim 1 or 2,
The lower end surface of the cylindrical portion of the rubber elastic body and the receiving surface of each stepped portion are respectively formed with annular sealing protrusions for sealing between the upper surface of the flange portion. Liquid-filled vibration isolator. In the liquid enclosure type vibration isolator as described in any one of Claims 1-3,
Between adjacent flange portions, a partition portion is formed that partitions a communication path that communicates adjacent groove portions,
A liquid-filled type vibration damping device, wherein a hole for receiving the partition is formed in a portion corresponding to the partition on the inner peripheral surface of each step.

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