JPH09264375A - Vibration control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate manufacture and prevent membrane rubber from being deviated and from slipping off, by forming a partition plate member by high polymer materials, integrally forming the membrane rubber, and providing a recessed or projecting part on the peripheral edge of the membrane rubber. SOLUTION: Annular recessed parts 8 are provided on both sides on the peripheral edge of the membrane rubber 16. A metal mold 31 is constituted of split molds 33, 34, 35, and the membrane rubber 16 is pinched and set between the metal molds 33, 35 in forming. A heated resin material is injected to a cavity of the metal mold 31 through a gate 32 in this state, and a partition plate member 17 is formed. The peripheral edge of the disc-like membrane rubber 16 is pinched by parts projecting on the inner peripheral side of an opening part 26 of a partition wall material 27 and on both end sides in the axial direction, and the membrane rubber 16 is integrated with the partition wall material 27 only by resin molding. Accordingly, the process for assembling the partition wall material so divided as to pinch the membrane rubber, the adhesion process of the membrane rubber and the preparation process can be reduced, and the membrane rubber can be prevented from being deviated and from slipping off.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration isolation device used for preventing transmission of vibrations from an engine mounted on a vehicle.

[0002]

2. Description of the Related Art For example, a vehicle is provided with an anti-vibration device as an engine mount between an engine which is a vibration generating part and a vehicle body which is a vibration receiving part. The vibration device absorbs the vibration and prevents the vibration from being transmitted to the vehicle body.

FIG. 5 shows this conventional vibration damping device. The vibration isolator 101 has an attachment screw 110 on the upper side for connecting to an engine (not shown).
11 is projected from the central portion and these are used as a first mounting member. Further, on the lower side, a screw 112 for connecting and fixing to a vehicle body (not shown) protrudes in the central portion of the lid member 113, and a collar portion 113B is formed around the lid member 113 via a standing wall 113A. Cage 113
An outer cylinder 114 is attached to the upper end portion of B, and these are used as a second attachment member. The first attachment member and the second attachment member are connected by the elastic body 115, and the elastic body 1
Liquid chambers 119 and 120 whose volumes change due to deformation of 15 are provided. The liquid chambers 119 and 120 are divided into a pressure receiving liquid chamber 119 and a sub liquid chamber 120 by a partition plate member 117 having a membrane rubber 116, and the partition plate member 117 further includes the pressure receiving liquid chamber 119 and the sub liquid chamber. A restricted passage 121 communicating with 120 is provided.

When the mounted engine operates to generate vibration, the elastic body 115 has a vibration damping function, and
Vibration is suppressed by viscous resistance of the liquid in the restriction passage 121 that connects the liquid chambers 119 and 120, liquid column resonance, or the like. By providing the air chamber 123, the liquid chamber 119,
It allows liquid movement between 120.

[0005]

A conventional vibration isolator 101
In the above, the membrane rubber 116 provided on the partition plate member 117 is attached by sandwiching or bonding. That is, as shown in FIG. 5, in the case of sandwiching, the partition wall member 1 forming the outer peripheral edge portion of the partition plate member 117.
Reference numeral 27 denotes an outer peripheral end 127A on the pressure receiving liquid chamber 119 side and an outer peripheral end 127B on the liquid administration chamber 120 side. The outer peripheral end 127A has a stepped portion on the inner peripheral portion on the liquid supply chamber 120 side. The outer peripheral end portion 127B is provided with a step portion on the pressure receiving liquid chamber 119 side of the inner peripheral portion. The partition wall material 127 is formed by combining these outer peripheral end portions 127A and 127B, and at the time of combination, the membrane rubber 116 is provided in the gap between the respective step portions.
It was attached by sandwiching. Therefore, there is a problem in that the number of parts is large and the number of manufacturing steps is large when mounting by sandwiching. Further, in the case of attachment by adhesion, the disk-shaped membrane rubber 116 is attached by adhesion to the inner peripheral surface of the partition member 127 (not shown) integrally formed with the outer peripheral end portions 127A and 127B. In this case, there is a problem that the number of manufacturing processes is large and the work is complicated.

In view of the above facts, the present invention has an object to provide a vibration isolator which has a simple construction of the partition plate member, is easy to manufacture, and prevents the displacement and falling of the membrane rubber. To do.

[0007]

Means for Solving the Problems The vibration isolator of the present invention has the following configuration to achieve the above object. According to the invention of claim 1, a first mounting member connected to one of the vibration generating portion and the vibration receiving portion, a second mounting member connected to the other of the vibration generating portion and the vibration receiving portion, and the first mounting member.
An elastic body connecting the mounting member and the second mounting member, a liquid chamber in which at least a part of the inner wall is formed of the elastic body and liquid is sealed, and the liquid chamber is deformed by the elastic body. A partition plate member that is divided into a pressure receiving liquid chamber that expands and contracts and a sub liquid chamber that is adjacent to the pressure receiving liquid chamber, and that has a membrane rubber that extends between these two liquid chambers, and that connects the pressure receiving liquid chamber and the sub liquid chamber. A vibration damping device having a restricting passage for forming the partition plate member made of a polymer material, integrally molding the membrane rubber, and being embedded in the polymer material forming portion. It is characterized in that a concave or convex portion is provided on the peripheral portion.

According to the present invention, since the membrane rubber is integrally molded with the partition plate member, the structure of the partition plate member is simple, the manufacturing process can be omitted, and the partition plate member can be easily manufactured. By providing the concave or convex portion on the peripheral edge of the membrane rubber to be fixed, the membrane rubber is securely fixed, and it is possible to prevent the membrane rubber from slipping off and falling off.

[0009]

FIG. 1 is a cross-sectional view of a vibration isolator according to an embodiment of the present invention. In this vibration isolator 1, a flange portion 25A projects over the entire outer circumference of the upper portion of a connecting plate 25 having a substantially U-shaped cross section, and the connecting plate 25
The mounting member 11 is welded to the flange portion 25A.
The fitting 11 is fixed to the upper part of the connecting plate 25. Further, the screw 10 protruding from the central portion of the mounting bracket 11 is used to connect to one of the vibration generating portion and the vibration receiving portion. The mounting bracket 11 and the screw 10 form a first mounting member.

The second mounting member is a screw 12 connected to the other of the vibration generating portion and the vibration receiving portion, a lid member 13, and an outer cylinder 1.
It consists of four. A flange plate 13B is formed around the lid member 13 via a cylindrical standing wall 13A, and an outer cylinder 14 is attached to an upper portion of the flange plate 13B. The outer cylinder 14 has a disk-shaped flange portion 14A, and an outer peripheral end portion thereof is caulked and fixed to the flange portion 13B.

The outer cylinder 14 is provided with a cylindrical portion 14B standing upright from the inner peripheral portion of the flange portion 14A.
A support cylinder portion 14C that extends in a tapered shape is continuous from the upper end portion of 4B.

The outer peripheral surface of a substantially cylindrical elastic body 15 is vulcanized and adhered to the inner peripheral surface of the support cylinder portion 14C. The inner peripheral surface of the elastic body 15 is vulcanized and adhered to the connecting plate 25. Has been done. Therefore, the elastic body 15 connects the first mounting member and the second mounting member.

Further, an outer periphery 14 to which an elastic body 15 is adhered
A diaphragm 18 made of a thin film elastic material is attached to the opening end side of the. A closed space is formed by the elastic body 15, the outer cylinder 14, and the inner wall surface of the diaphragm 18, and a liquid such as water, oil, or ethylene glycol is sealed in the closed space to form a liquid chamber. A partition plate member 17 is arranged in this liquid chamber, and divides the liquid chamber into a pressure receiving liquid chamber 19 and a sub liquid chamber 20. In addition,
As shown in FIG. 1, the inner peripheral surface of the outer cylinder 14 may be covered with a thin-walled thin portion 15A integrally with the elastic body 15 and depending from the elastic body, if necessary.

The partition plate member 17 is composed of a partition material 27 having a circular opening 26 formed in the center and a membrane rubber 16. The partition material 27 is made of polyamide resin, ABS,
It is formed of a thermoplastic resin such as polyacetal, polycarbonate and polyimide. And the partition material 2
When the resin 7 is molded, the membrane rubber 16 is simultaneously molded integrally with the opening 26. And the partition material 27
When the resin is molded, the membrane rubber 16 is simultaneously molded integrally with the opening 26. The partition wall material 27 made of this polymer material may be made of thermosetting resin such as epoxy resin or phenol resin, or elastomer other than the above-mentioned materials.

Further, in the peripheral portion of the membrane rubber 16 embedded in the resin, a concave portion 28 formed of an annular groove is provided on both sides of the pressure receiving liquid chamber 19 side and the sub liquid chamber 20 side.
Therefore, when the partition wall member 27 contracts due to a large amplitude vibration and is excessively deformed, or the so-called sink mark after molding causes the partition member 27 to shrink.
Even when the diameter of the partition wall expands, since the recess 28 and the part of the partition material 27 that has entered the recess 28 are engaged in the radial direction, the partition material 27 and the membrane rubber 16
Can be reliably fixed and the membrane rubber 16 can be prevented from slipping off and falling off. The recess 28 is not limited to the annular shape, but may be a plurality of recesses provided concentrically.

Further, in this embodiment, the membrane rubber 1
Although a concave portion 28 is provided in the peripheral portion embedded in the resin of No. 6, as shown in FIG. 2, annular or a plurality of convex portions are provided on both sides of the pressure receiving liquid chamber 19 side and the sub liquid chamber side. Good.

FIG. 3 is a plan view of the partition wall material 27 as viewed from the upper side of FIG. 1. The partition wall material 27 has an outer peripheral end 27A on the pressure receiving liquid chamber 19 side and an auxiliary liquid chamber 20 side on the outer peripheral surface side. Outer edge 27
It has a peripheral groove 27C having a U-shaped cross section formed with B. The circumferential groove 27C is formed over the entire circumference of the partition wall material 27 until both ends reach the partition wall 27D. Further, notches 27E and 27F are formed at both ends of the circumferential groove 27C, and when assembled in the outer cylinder 14, they become through holes 22A and 22B described later.

The limiting passage 21, which is a passage between the pressure receiving liquid chamber 19 and the sub liquid chamber 20, is formed by the peripheral groove 27C of the partition wall member 27 and the inner wall of the outer cylinder 14. The outer cylinder 14
The inner wall may be covered with the thin portion as described above. A through hole 22A that connects the pressure receiving liquid chamber 19 and the restriction passage 21 is formed at one end of the restriction passage 21, and a through hole 22B that connects the auxiliary liquid chamber 20 and the restriction passage 21 at the other end.
Are formed. Therefore, the restriction passage 21 and the through holes 22A and 22B connect the pressure receiving liquid chamber 19 and the sub liquid chamber 20.

The lower portion of the outer peripheral edge portion 27A projects outward and is brought into contact with the bottom surface of the flange portion 14A. Further, an air chamber 23 is provided between the diaphragm 18 and the lid member 13.
Thus, the diaphragm 18 can be deformed. Then, the lower surface side of the membrane rubber 16 and the diaphragm 1
An outer peripheral end portion is sandwiched and fixed between the diaphragm 18 and the outer peripheral end portion 27A between the upper surfaces of the metal stoppers 8, and a metal stopper metal fitting is protruded in a circular shape so that the central portion faces the membrane rubber 16. 24, and the outer peripheral end of the stopper fitting 24 is bent so as to extend upward,
The flange portion 14A of No. 4 and the upper end portion are in contact with each other. That is, the flange plate 13B and the flange portion 14A form the outer peripheral end portion 27B, the outer peripheral end portion of the stopper fitting 24, and the diaphragm 1.
8 and the outer peripheral edge portion of 8 are sandwiched.

Further, a plurality of through holes 24A are formed in the stopper fitting 24, and the through holes 24A communicate the space defined by the stopper fitting 24 and the membrane rubber 16 with the sub liquid chamber 20. There is. The stopper fitting 24 at a position corresponding to the through hole 22B that connects the auxiliary liquid chamber 20 and the restriction passage 21 has a through hole 24B as shown in the drawing.

The vibration isolator 1 according to the present embodiment includes a mounting bracket 1
When the engine mounted on the No. 1 is operated, the vibration of the engine is transmitted to the elastic body 15 via the fitting 11 and the connecting plate 25. The elastic body 15 acts as a vibration absorbing body, and can absorb the vibration by a vibration damping function based on internal friction when the elastic body 15 is deformed. Further, the liquid in the pressure receiving liquid chamber 19 and the liquid in the auxiliary liquid chamber 20 mutually flow through the restriction passage 21, and the vibration damping effect can be improved by the damping action based on the viscous resistance of the liquid flow generated in the space of the restriction passage 21. it can. Further, since the space of the restricted passage 21 is arranged adjacent to the inner circumference of the outer cylinder 14, the turning radius thereof is large, and therefore the axial length is long, and a large damping can be obtained.

Further, the membrane rubber 16 is attached to the opening 26 of the partition member 27, and the stopper fitting 24 having the through hole 24A is installed in each of the liquid chambers 19 and 20 with the membrane rubber 16 sandwiched therebetween. Therefore, it works as follows.

Even when the high-frequency vibration is transmitted, even when the restriction passage 21 capable of only reducing the narrow frequency range is clogged and the vibration is not sufficiently reduced by only the restriction passage 21, the membrane rubber is used. 16 does not elastically deform, and the internal pressure in the pressure receiving liquid chamber 19 does not increase. As a result, even if a high-frequency vibration that cannot reduce the vibration occurs in the restricted passage 21, it becomes a low dynamic spring, the vibration-proof characteristics are maintained without being reduced, and the effect of the vibration-proof device 1 is sufficiently exerted. The membrane rubber 16 comes into contact with the stopper fitting 24 to prevent elastic deformation when the liquid can flow in the restriction passage 21, that is, when low-frequency large-amplitude vibration is transmitted.

FIG. 4 is for manufacturing the partition plate member 17 by resin molding, and the partition plate member 17 is manufactured by the mold 31 as shown. The mold 31 is composed of split molds 33, 34 and 35, and is set by sandwiching the membrane rubber 16 during molding between the split molds 33 and 35 as shown in the figure. In this state, the heated resin material is injected from the gate 32 into the cavity of the mold 31, and the partition plate member 17 is molded. By this resin integral molding, the membrane rubber 16 is embedded in the partition plate member 17, that is, the peripheral edge portion of the disk-shaped membrane rubber 16 projects on the inner peripheral side of the opening 26 of the partition member 27 and on both axial side ends. The structure is sandwiched between the protruding portions, and therefore the membrane rubber 1 can be formed only by performing resin molding.
6 is structurally coupled to and integrated with the partition member 27.

In this way, the membrane rubber 16 is divided so as to be sandwiched as compared with the one in which the membrane rubber 16 is sandwiched and mounted by the partition wall material formed separately and the membrane rubber is separately adhered to the molded partition wall material. The process of assembling the separated partition wall material, the process of bonding the membrane rubber or the process of pretreatment for bonding can be deleted,
Manufacturing becomes easy. The molded partition plate member 17 can be taken out from the mold 31 by the relative movement of the split molds 33, 34, and 35.

[0026]

As is apparent from the above description, according to the present invention, it is possible to easily manufacture with a simple structure, and it is possible to prevent the displacement and falling of the membrane rubber.

[Brief description of drawings]

FIG. 1 is a sectional view of a vibration isolator according to an embodiment of the present invention.

FIG. 2 is a partial cross-sectional view of a partition plate member of the vibration isolator according to the exemplary embodiment of the present invention.

FIG. 3 is a partial plan view of a partition plate member of the vibration isolator according to the exemplary embodiment of the present invention.

FIG. 4 is a cross-sectional view in which a membrane rubber is set in a mold for manufacturing a partition plate member according to the embodiment of the present invention.

FIG. 5 is a cross-sectional view of a conventional vibration damping device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Anti-vibration device 10 Screw (first mounting member) 11 Mounting bracket (first mounting member) 12 Screw (second mounting member) 13 Lid member (second mounting member) 14 Outer cylinder (second mounting member) 15) Elastic body 16 Membrane rubber 17 Partition plate member 18 Diaphragm 19 Pressure receiving liquid chamber 20 Sub liquid chamber 21 Restriction passage 22A Through hole 22B Through hole 23 Air chamber 24 Stopper metal fitting 25 Connecting material 27 Partition material 28 Recess or convex portion

Claims (1)

[Claims] 1. A first mounting member connected to one of the vibration generating section and the vibration receiving section, a second mounting member connected to the other of the vibration generating section and the vibration receiving section, and the first mounting. An elastic body connecting the member and the second mounting member, a liquid chamber in which at least a part of the inner wall is formed of the elastic body and liquid is sealed, and the liquid chamber is expanded and contracted by the deformation of the elastic body. Divided into a pressure receiving liquid chamber and an auxiliary liquid chamber adjacent to this,
A vibration damping device having a partition plate member having a membrane rubber extending between the two liquid chambers and a restriction passage communicating the pressure receiving liquid chamber and the sub liquid chamber with each other. Is formed of a polymer material, the membrane rubber is integrally molded, and a concave or convex portion is provided in the peripheral edge portion of the membrane rubber embedded in the polymer material forming portion. .