JP2009228718A - Liquid seal vibration isolating device and manufacturing method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To save cost as much as possible by eliminating the welding of a mounting leg in liquid seal vibration isolation. <P>SOLUTION: In the liquid seal vibration isolating device, a first mounting metal fitting 2 integrating a first bolt 5 and a first plate 6, a second bolt 7 making a part of a second mounting metal fitting 3, and a caulking member 9 are put in a mold, thereby integrally forming an insulator 4. An integrated molding portion integrating a second plate 8 forming the first mounting metal fitting 2 and the second mounting metal fitting 3, and the caulking member 9 is formed. At that time, the second plate 8 is not disposed on the second mounting metal fitting 3 side, so that a main liquid chamber 10, a sub liquid chamber 11, and an orifice groove 17 can be integrally formed from this side. The integrated molding portion is put in the liquid, and the second plate 8 of the second mounting metal fitting 3 is externally fitted with the second bolt 7. When the outer periphery of the second plate 8 is caulked by the caulking member 9, the whole of those is integrated to form an engine mount 1. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a liquid ring vibration isolator such as a liquid ring engine mount and a manufacturing method thereof.

In the liquid seal vibration isolator, the first mounting bracket and the second mounting bracket are integrated with an insulator, and a partition member and a diaphragm in which an orifice passage is formed are sequentially covered thereon, and the partition member and the diaphragm are integrated with a cylindrical bracket integrated with the insulator. The diaphragm was fixed by caulking and integrated.
JP-B 62-53735

In the above-described conventional example, at least one of the first mounting bracket or the second mounting bracket must be mounted to the bracket integrated with the insulator by means such as welding. For this reason, a welding process is required, which causes an increase in cost, and in order to reduce the cost as much as possible, it is necessary to omit such welding work.
The present invention aims to make this possible.

In order to solve the above problems, the invention of claim 1 relating to the liquid seal vibration isolator and the manufacturing method thereof is attached to the first side of the vibration source or the vibration transmission member and to the other side. A second mounting bracket, an insulator which is a vibration-proof elastic body that couples the two mounting brackets, a plurality of liquid chambers having the insulator as a part of a wall portion, and a liquid passage connecting the liquid chambers In a liquid seal vibration isolator equipped with
The insulator is formed by combining and integrating the first mounting bracket and the second mounting bracket,
An opening portion of the liquid chamber and the liquid passage formed in the insulator is covered with a closing member, and the liquid passage is formed between the mating portion of the metal portion of the closing member and the insulator.

The invention of claim 2 is the above-mentioned claim 1, wherein each of the first and second mounting brackets is composed of a mounting shaft disposed on the center line of the insulator and a plate extending in a direction orthogonal to the center line,
The first mounting bracket is combined and integrated with one end surface in the center line direction of the insulator in a state where the mounting shaft and the plate are integrated in advance.
In the second mounting bracket, the mounting shaft is coupled and integrated with the other end surface in the center line direction of the insulator, and the plate is crimped and fixed with a crimping bracket whose outer peripheral portion is integrated with the insulator in advance.
The liquid passage is formed in a contact portion between the plate and the insulator.

According to a third aspect of the present invention, in the first aspect, the first mounting bracket includes a mounting shaft disposed on a center line of the insulator and a plate extending in a direction orthogonal to the center line. The mounting shaft and the plate Are combined and integrated with one end surface in the center line direction of the insulator in a state of being integrated in advance,
The second mounting bracket is directly coupled and integrated with the outer peripheral portion on the other end side in the center line direction of the insulator,
The liquid chamber covers a concave portion of the liquid chamber opened on the other end surface in the center line direction of the insulator with a diaphragm forming the closing member,
And the partition inside the liquid chamber recess is made of an elastic body and the liquid passage groove is integrally formed to partition the main liquid chamber and the sub liquid chamber,
The liquid passage is formed by covering the liquid passage groove with a metal mounting plate integrated with an outer peripheral portion of the diaphragm.

  According to a fourth aspect of the present invention, in the third aspect of the present invention, a cylindrical metal fitting for caulking and fixing the mounting plate is integrated with the outer peripheral portion on the other end side in the center line direction of the insulator. A connecting portion which is a part of the insulator is interposed between the cylindrical metal fitting and the second mounting metal fitting.

The invention according to claim 5 is the first mounting bracket attached to either the vibration source or the vibration transmission member, the second mounting bracket attached to the other side, and the vibration-proofing body that couples between them. In a method of manufacturing a liquid seal vibration isolator comprising an insulator as an elastic body, a plurality of liquid chambers having the insulator as a part of a wall portion, and a liquid passage connecting the liquid chambers,
By forming the insulator by integrating the first mounting bracket and the second mounting bracket, these three members are combined together, and the liquid chamber and the liquid passage are respectively opened outward. A first step of forming an integrally formed portion;
Thereafter, the integrally formed portion is put into the liquid, the open portions of the liquid chamber and the liquid passage are covered with a closing member, and the closing member is caulked and fixed with a caulking metal fitting previously integrated with the insulator. It is characterized by the following.

According to the liquid seal vibration isolator and the manufacturing method thereof according to the present invention, since both the first mounting bracket and the second mounting bracket are directly coupled and integrated with each other, the first mounting bracket and the second mounting bracket are integrated. There is no need to attach the metal fittings by welding, and the cost can be reduced as much as possible by omitting this welding process.
In addition, since the liquid passage is formed by closing the open portion of the liquid passage groove formed in a partially opened state with the metal portion of the closing member, the accurate liquid passage is brought about by the contact between the elastic body and the metal. Can be formed, and a seal can be ensured.

  The first embodiment will be described below with reference to the drawings. 1 is a plan view of a liquid seal engine mount for automobiles, FIG. 2 is a sectional view taken along line 2-2, FIG. 3 is a sectional view taken along line 3-3, and FIG. 4 is a sectional view taken along line 4-4 in FIG.

  The engine mount 1 is formed by integrating a first mounting bracket 2 and a second mounting bracket 3 on both sides in the center line direction of an insulator 4 having a substantially cylindrical block shape. The first mounting bracket 2 is obtained by integrating the first bolt 5 and the first plate 6. One end of the first bolt 5 is welded and integrated at the center of the first plate 6 that is formed of a metal disk. is there. The first bolt 5 has a threaded portion attached to either a vibration source such as an engine (not shown) or a vibration transmission member such as a vehicle body. The second mounting bracket 3 is attached to either side.

  The second mounting bracket 3 also includes the second bolt 7 and the second plate 8, but the second bolt 7 and the second plate 8 are not integrated in advance, and the second bolt 7 is integrated with the insulator 4 in advance. ing. On the other hand, the second plate 8 is attached to the caulking member 9 integrated with the insulator 4 by caulking in a later process.

  The second plate 8 is provided with a through hole 8a at the center, and has a slight gap such as the periphery of the second plate 8 and the inner periphery of the through hole 8a. The plate 8 is integrated via the insulator 4. The screw portion of the second bolt 7 is attached to the other side of the vibration source or the vibration transmitting member.

The insulator 4 is made of a known vibration-proof material such as rubber, and has one end surface in the axial direction coinciding with the direction of the center line C (FIG. 2) (in this embodiment, the end surface facing the second plate 8 of the second mounting bracket 3). The main liquid chamber 10 and the sub liquid chamber 11 that are open to the inside of the wall are formed so as to enter the inside of the wall thickness toward the other end surface along the center line C, and the tip reaches the vicinity of the first plate 6.
Of the outer peripheral surface portion of the insulator 4, the main liquid chamber portion 12 formed on the outer peripheral side in the vicinity of the main liquid chamber 10 is relatively thick and has a bulge whose middle portion in the center line C direction is constricted in the center line C direction. It has a spring shape and the elastic deformation is increased. In addition, instead of constriction, it may be projected, and in this case, it is suitable for applications requiring a high spring.

Of the outer peripheral surface portion of the insulator 4, the outer peripheral portion in the vicinity of the auxiliary liquid chamber 11 forms a diaphragm portion 13. The diaphragm portion 13 is thin and substantially does not produce a spring that affects the vibration isolation characteristics during elastic deformation. The first bolt 5 and the second bolt 7 are located concentrically on the center line C, and the vibration that is input along the direction of the center line C is the main part inside the main liquid chamber 10 and the sub liquid chamber 11 in the insulator 4. 14 is absorbed mainly, and this part functions as a main spring.
At this time, the main liquid chamber portion 12 is also involved, but the main liquid chamber portion 12 serves rather as an adjustment portion for the main spring by adjusting its shape and thickness.

The caulking member 9 is a substantially donut disk-shaped metal member, and a caulking flange 15 is folded and formed integrally with the outer periphery of the caulking member 9 downward in FIG. The opening 16 on the inner peripheral side (see FIG. 5) has a large diameter (larger than the maximum outer diameter of the head 7a of the second bolt 7), and is located outside each of the main liquid chamber 10 and the sub liquid chamber 11.
2 and 3, the caulking flange 15 is caulked and fixed to the caulking member 9 and the second caulking member 9 by folding the caulking flange 15 onto the caulking 8b formed on the outer periphery of the second plate 8. The plate 8 is integrated.

As shown in FIG. 4, the main liquid chamber 10 and the sub liquid chamber 11 are communicated with each other by an arc-shaped orifice groove 17 which is a liquid passage groove of the present invention. As shown in FIG. 3, the orifice groove 17 is a groove formed so as to enter the thickness of the second plate 8 from the end surface on the second plate 8 side so as to enter the wall thickness and open toward the second plate 8. This open portion forms the open portion of the liquid passage in the present invention.
The opening of the orifice groove 17 is closed by overlapping the second plate 8, which is a closing member of the present invention, on one end surface in the center line C direction of the insulator 4. An orifice passage is formed in this space. Each main liquid chamber 10, sub liquid chamber 11 and orifice groove 17 are filled with liquid.

  When vibration is input to the first or second mounting brackets 2 and 3 along the direction of the center line C, the engine mount 1 first absorbs the elastic deformation of the insulator 4 and subsequently changes the capacity of the main liquid chamber 10. Is absorbed by the movement of the liquid. At this time, when the volume of the main liquid chamber 10 decreases, the liquid is fed into the sub liquid chamber 11 through the orifice groove 17. Variations in the liquid volume in the auxiliary liquid chamber 11 are absorbed by the deformation of the diaphragm section 13. Furthermore, with respect to the input vibration having a specific frequency, the vibration is absorbed by liquid column resonance caused by the liquid flowing through the orifice groove 17 in accordance with the elastic deformation of the insulator 4.

  Next, a manufacturing method is demonstrated. FIG. 5 shows the manufacturing process. First, the integrally molded portion 18 is formed as a first step. In this case, the first mounting bracket 2 is formed by integrating the head 5a by welding through the first bolt 5 in the through hole 6a provided in the center of the first plate 6.

  The first mounting bracket 2, the caulking member 9, and the second bolt 7 that is a part of the second mounting bracket 3 are arranged in the mold, and the raw material liquid of the insulator 4 is injected and integrated. At this time, since the second plate 8 is not integrated with the second bolt 7 on the second mounting bracket 3 side, the main liquid chamber 10 is disposed from the second mounting bracket 3 side (the lower side in the figure) of the insulator 4. , The auxiliary liquid chamber 11 and the orifice groove 17 are simultaneously formed by the corresponding mold convex portions (not shown). Thereafter, in the case of rubber, when vulcanized and cured, the first mounting bracket 2 is integrated with one end surface (upper surface in the figure) of the insulator 4 in the center line C direction, and the second bolt is mounted on the lower surface 19 which is the other end surface. The integral molding part 18 which integrated only 7 is formed. The lower surface 19 faces open portions of the main liquid chamber 10, the auxiliary liquid chamber 11, and the orifice groove 17 (not shown), the head 7 a of the second bolt 7 is embedded and integrated in the center, and the lower surface 19 of the insulator 4. A caulking flange 15 is integrated with the side outer peripheral portion.

Next, a second process of enclosing and assembling the liquid is performed. The second plate 8 and the integrally formed portion 18 formed in a predetermined shape by press molding or the like are put into the liquid in the liquid tank 20, and the main liquid chamber 10, the sub liquid chamber 11 and the orifice groove 17 are filled with liquid, and then Then, the second plate 8 is overlaid on the lower surface 19. At this time, the second bolt 7 is passed through the through hole 8 a of the second plate 8, and the second plate 8 is brought into contact with the lower surface 19 while being discharged from between the second plate 8 and the lower surface 19. Adjust. When the lower surface 19 and the second plate 8 are overlapped and brought into contact with each other, the front end side of the caulking flange 15 is bent onto the step portion 8b and fixed by a known caulking method, and the whole is integrated into the engine mount 1. (FIG. 1).
Thereafter, the third step of dipping the engine mount 1 into the coating liquid and painting the outer surface to finish it is performed.

  If it does in this way, the 1st mounting bracket 2 and the 2nd mounting bracket 3 (strictly the 2nd volt | bolt 7 which is the one part) can be integrated directly by the insulator 4. FIG. For this reason, it is not necessary to weld the head 7a of the second bolt 7 or the like to the second plate 8 in advance and to integrate the second mounting bracket 3 as in the prior art, and by omitting this welding process, Costs can be reduced as much as possible.

  In addition, since the assembly work after the insulator 4 is molded only involves caulking the second plate 8, as in the prior art, the main liquid chamber and the sub liquid chamber are formed, the orifice passage is formed, and the diaphragm is fixed. Therefore, it is not necessary to assemble by a plurality of processes, and the assembling work is simplified, and particularly the assembling work in liquid is facilitated.

  Further, by fixing the second plate 8 by caulking, the open portions of the main liquid chamber 10, the sub liquid chamber 11 and the orifice groove 17 can be closed to form the respective liquid chambers and orifice passages, and the second plate made of metal. 8 and the lower surface 19 of the insulator 4 made of an elastic body can be sealed with an intimate structure of the elastic body and metal, so that the sealing structure of these liquid enclosures can be simplified.

  In addition, since the assembled engine mount 1 is dipped and painted, individual coating on the constituent metal parts is not required. However, only a part of the flange 15 that becomes the crimping portion is additionally coated after the crimping operation if necessary, but the additional coating portion needs only such a local one.

  Next, a second embodiment will be described. FIG. 6 is a plan view of an engine mount 21 configured as a substantially conical liquid-sealed engine mount, and FIG. 7 is a sectional view taken along line 7-7. As apparent from these drawings and FIG. 8 for explaining the assembly method, the first mounting bracket 22 and the second mounting bracket 23 are integrated with the insulator 24, and toward the one end side in the center line C direction of the insulator 24. A partition member 26 is placed in the opened recess 25, and the opening of the recess 25 is covered with a diaphragm 27, whereby the main liquid chamber 28 and the sub liquid chamber 29 that are partitioned by the partition member 26 in the recess 25 are centered. It is provided in the direction of line C, that is, in the vertical direction in FIG. The main liquid chamber 28 and the sub liquid chamber 29 are communicated with the outer peripheral portion 31 of the partition member 26 through an orifice passage formed by an orifice groove 30 formed in an arc shape in the circumferential direction when viewed in the direction of the center line C. The orifice groove 30 is a liquid passage groove of the present invention.

  The first mounting bracket 22 is formed by integrating a first bolt 35 and a first circular plate 36 similar to the previous embodiment. The second mounting bracket 23 includes a plate-shaped mounting leg 37 formed by press molding or the like and having a substantially L-shaped cross section, and a cylindrical bracket 38 integrated with the insulator 24 so as to surround the main liquid chamber 28. By being integrated at the coupling portion 39 that is a part of the insulator 24, the insulator 24 is integrated and attached to the insulator 24.

  The mounting leg 37 is formed integrally with a standing wall portion 40 parallel to the center line C direction and a mounting portion 41 extending in a direction orthogonal to the center line C. The mounting portion 41 is provided with bolts for mounting to a vehicle body or the like. A through hole 42 is formed.

  The cylindrical fitting 38 is a cylindrical member, and includes a main body portion 43 parallel to the center line C, and an upper flange 44 and a lower flange 45 that are bent outward in the axial direction. A part of the lower flange 45 is longer and protrudes in the direction of the center line C to form a caulking portion 45a.

The insulator 24 has a substantially truncated cone shape whose diameter changes in the direction of the center line C. In FIG. 7, the insulator 24 has a large-diameter portion 24a on the lower side and a small-diameter portion 24b on the upper side. Yes. The slope 24c changes to an upward slack. The large-diameter portion 24a has a vertical width dimension in the center line C direction that is slightly larger than the vertical width dimension of the cylindrical fitting 38, and the entire cylindrical fitting 38 is embedded and integrated in the large-diameter portion 24a. It is slightly larger than the outer diameter of the main body 43, which is an intermediate portion in the direction, and the outer peripheral portion goes out of the main body 43 of the cylindrical metal fitting 38 to become a coupling portion 39, and this portion serves as an adhesive to stand the mounting leg 37 upright. The mounting leg 37 is integrated with the insulator 24 by connecting the wall 40 to the outer periphery of the main body 43 and the lower surface of the upper flange 44.
The mounting leg 37 is provided in a part of the large-diameter portion 24a surrounding the cylindrical metal member 38 in the circumferential direction, and the outer peripheral part of the cylindrical metal member 38 where the mounting leg 37 is not provided forms a cylindrical metal member covering part 24d. The cylindrical metal shell covering portion 24d is thicker than the coupling portion 39, and is formed integrally with the coupling portion 39 and the large diameter portion 24a. The mounting leg 37 is formed so as to enter a part of the cylindrical bracket covering portion 24d, and the outer peripheral surfaces of the standing wall portion 40 and the cylindrical bracket covering portion 24d have the same diameter.

  The lower part of the coupling part 39 forms a thick part 39a by a rounded part 37a between the standing wall part 40 and the mounting part 41, thereby strengthening the coupling. In addition, since the coupling portion 39 is interposed between the mounting leg 37 and the cylindrical metal fitting 38, the vibration transmission from the cylindrical metal fitting 38 to the mounting leg 37 is cut off. 39 constitutes a double anti-vibration structure that blocks vibration transmission between the first mounting bracket 22 and the second mounting bracket 23, thereby enhancing the overall anti-vibration effect.

  As is clear from FIG. 8, the partition member 26 has a thick disk shape entirely made of an elastic body such as rubber, and the outer peripheral portion 31 is the thickest, and the orifice is within the thickness of this portion. A groove 30 is formed. The orifice groove 30 is open on the secondary liquid chamber 29 side. The orifice groove 30 has an arc shape when viewed in the direction of the center line C, but communicates with the main liquid chamber 28 through the communication hole 30a and communicates with the sub liquid chamber 29 through the communication groove 30b.

  The wall thickness of the partition member 26 gradually becomes thinner toward the center in the radial direction, the central part forms the thinnest elastic film part 32, absorbs fluctuations in the internal pressure of the main liquid chamber 28, and has a low dynamic spring structure. . Of the lower surface of the partition member 26, the periphery of the elastic film portion 32 forms a slope, and the wall thickness of the partition member 26 increases toward the outer periphery, and a part of the wall thickness that forms a substantially triangular cross section. A communication groove 30b extending in the radial direction and opened downward in FIG. 7 is formed.

  The diaphragm 27 is well known, and as is apparent from FIG. 8, the outer peripheral portion 27a is integrated with the inner peripheral portion of a metal disk-shaped mounting plate 33 having a substantially donut shape. The mounting plate 33 closes the orifice groove 30 of the outer peripheral portion 31 to form an orifice passage, and further extends radially outward so that the crimping portion 45a of the lower flange 45 can be bent and fixed so as to be crimped.

As shown in FIG. 7, the partition member 26 is fitted into the opening of the recess 25 in the insulator 24, the mounting plate 33 of the diaphragm 27 is overlapped on the outer side, and the outer peripheral portion of the mounting plate 33 is fixed by caulking with the lower flange 45. As a result, the whole is integrated to form the engine mount 21.
The opening portion of the orifice passage 30 is the opening portion of the liquid passage in the present invention, and the mounting plate 33 is the closing member of the present invention.

  The engine mount 21 is used, for example, with the first bolt 35 attached to the engine side and the mounting leg 37 attached to the vehicle body side (however, the opposite is also possible). As a result, when vibration is input in the direction of the center line C, it is absorbed by the insulator 24, and the liquid flows between the main liquid chamber 28 and the sub liquid chamber 29 through the orifice groove 30 due to the volume change of the main liquid chamber 28. Resonates with the liquid column and vibrates. Further, by providing a coupling portion 39 between the mounting leg 37 and the cylindrical metal fitting 38, vibration transmission between the mounting leg 37 and the cylindrical metal fitting 38 is cut off and the vibration is prevented, so that a double vibration isolation structure can be obtained.

  Next, the production method will be described. FIG. 8 is a diagram showing the manufacturing process, and the small assembly integrated portion 46 is formed as the first process. In this case, the cylindrical bracket 38 and the mounting leg 37 are turned upside down with respect to the state shown in FIG. 7 and kept in a predetermined distance, and at the same time, the first bolt 35 is previously placed on the opposite side in the center line C direction. And the first mounting bracket 22 in which the first circular plate 36 is integrated, and the raw material liquid of the insulator 24 is injected into the mold and cured. At this time, when the insulator 24 is rubber, it is cured by vulcanization.

  By this molding, the mounting leg 37, the cylindrical bracket 38, and the first mounting bracket 22 are integrated with the insulator 24 to form a small assembly integrated portion 46. At this time, a connecting portion 39 that is a part of the insulator 24 is also integrally formed between the mounting leg 37 and the cylindrical metal member 38, and the mounting leg 37 and the cylindrical metal member 38 are bonded together to bond the mounting leg 37 to the insulator 24. Integrate.

Subsequently, as a second step, a liquid sealing process is performed for assembly. First, the small assembly unit 46, the partition member 26, and the diaphragm 27 are turned upside down and put into the liquid in the tank 50. Further, the partition member 26 is put into the recess 25, and the diaphragm 27 is placed thereon. When the mounting plate 33 is overlapped with the outer peripheral portion of the partition member 26 to cover the orifice groove 30 and the lower flange 45 is bent onto the outer periphery of the mounting plate 33 and the caulking is fixed while adjusting the amount of liquid to be sealed, the whole is integrated. Thus, the engine mount 21 is obtained (FIG. 7).
Thereafter, in the third step, the entire engine mount is finished by dipping or the like.

  With this configuration, the mounting leg 37 is conventionally attached to the cylindrical fitting 38 by welding in advance. However, the mounting leg 37 can be bonded and integrated together with the cylindrical fitting 38 at the coupling portion 39 of the insulator 24. Since the bonding can be performed simultaneously with the molding, the welding process can be omitted, and the cost can be reduced as much as possible.

Further, since the partition member 26 is entirely formed of an elastic body, it is not necessary to form a partition member and an orifice passage by integrating a plurality of parts as in the prior art, and the structure is simplified.
Moreover, since the contact portion between the mounting plate 33 and the outer peripheral portion 31 of the partition member 26 has a sealing property by the partition member 26 that is an elastic body, the mounting plate 33 covers the orifice groove 30 and the outer peripheral portion of the mounting plate 33. By simply caulking with the lower flange 45, the sealed liquid can be easily and reliably sealed.

  Moreover, since the outer peripheral part 31 of the partition member 26 which is an elastic body and the metal mounting plate 33 are brought into close contact with each other, a highly reliable seal structure can be obtained. In addition, the effect similar to the previous Example, such as the effect by dipping the whole, is also acquired.

Next, a variation structure of the second embodiment will be described. The parts common to the second embodiment will be described using common reference numerals and only the characteristic parts will be described, and redundant description of other common parts will be omitted in principle.
FIG. 9 shows the mounting leg 37 provided with a rib 47 that connects the standing wall 40 and the mounting part 41. In this way, only the mounting leg 37 that requires the highest rigidity can be easily increased in rigidity. And less impact on overall weight and cost.

FIG. 10 shows a case where a reinforcing member 51 is welded between a part of the cylindrical metal member 38, specifically, between the upper flange 44 and the upper part of the main body 43. Even in this case, only a portion requiring strength can be locally reinforced.
Reference numeral 52 denotes a protrusion damper. The protrusion damper 52 is a protrusion integrally protruding outward from a part of the cylindrical metal member covering portion 24d of the insulator 24, and the resonance of the protrusion damper 52 reduces the rigid body resonance of the double vibration isolation structure portion. -Lightweight structure is possible.

In FIG. 11, a reinforcing ring 53 having an L-shaped cross section is integrated in an outer peripheral portion 31 of the partition member 26 so as to surround an outer peripheral surface parallel to the axial direction and a portion overlapping the orifice groove 30 in the axial direction.
In this way, by making the whole elastic body, when it is necessary to prevent the deformation of the mounting leg 37, the deformation of the mounting leg 37 can be surely prevented. Further, since the reinforcing ring 53 is locally sufficient, it is possible to prevent an increase in weight and an increase in cost.

Plan view of liquid seal engine mount for automobiles 2-2 sectional view of FIG. 3-3 sectional view of FIG. Sectional view taken along line 4-4 in FIG. Diagram showing manufacturing process Plan view of an engine mount according to the second embodiment Sectional view along line 7-7 in FIG. Diagram showing manufacturing process Diagram showing reinforcing ribs Diagram showing reinforcing bracket Diagram showing the reinforcement ring

Explanation of symbols

1: engine mount, 2: first mounting bracket, 3: second mounting bracket, 4: insulator, 8: second plate, 9: caulking member, 10: main liquid chamber, 11: sub liquid chamber, 17: Orifice groove, 18: integrally molded portion, 21: engine mount, 22: first mounting bracket, 23: second mounting bracket, 24: insulator, 26: partition member, 27: diaphragm, 28: main liquid chamber, 29 : Sub liquid chamber, 30: Orifice groove, 33: Mounting plate, 45: Lower flange, 46: Small assembly

Claims (5)

A first mounting bracket that is attached to either the vibration source or the vibration transmission member, a second mounting bracket that is attached to the other side, and an insulator that is an anti-vibration main elastic body that couples between them. In a liquid seal vibration isolator including a plurality of liquid chambers having the insulator as a part of a wall and a liquid passage connecting the liquid chambers,
The insulator is formed by combining and integrating the first mounting bracket and the second mounting bracket,
A liquid sealing prevention, wherein the liquid chamber formed in the insulator and the open portion of the liquid passage are covered with a closing member, and the liquid passage is formed between the metal portion of the closing member and the insulator. Shaker. Each of the first and second mounting brackets includes a mounting shaft disposed on a center line of the insulator and a plate extending in a direction orthogonal to the center line,
The first mounting bracket is combined and integrated with one end surface in the center line direction of the insulator in a state where the mounting shaft and the plate are integrated in advance.
In the second mounting bracket, the mounting shaft is coupled and integrated with the other end surface in the center line direction of the insulator, and the plate is crimped and fixed with a crimping bracket whose outer peripheral portion is integrated with the insulator in advance.
The liquid seal vibration isolator according to claim 1, wherein the liquid passage is formed in a contact portion between the plate and the insulator. The first mounting bracket includes a mounting shaft disposed on a center line of the insulator and a plate extending in a direction orthogonal to the center line, and the center of the insulator is preliminarily integrated with the mounting shaft. Combined and integrated with one end surface in the line direction,
The second mounting bracket is directly coupled and integrated with the outer peripheral portion on the other end side in the center line direction of the insulator,
The liquid chamber covers a concave portion of the liquid chamber opened on the other end surface in the center line direction of the insulator with a diaphragm forming the closing member,
And the partition inside the liquid chamber recess is made of an elastic body and the liquid passage groove is integrally formed to partition the main liquid chamber and the sub liquid chamber,
2. The liquid seal vibration isolator according to claim 1, wherein the liquid passage is formed by covering the liquid passage groove with a metal mounting plate integrated with an outer peripheral portion of the diaphragm. A cylindrical metal fitting for caulking and fixing the mounting plate is integrated with the outer peripheral portion on the other end side in the center line direction of the insulator, and the cylindrical metal fitting is fixed between the second metal fitting and the second metal fitting. The liquid seal vibration isolator according to claim 3, wherein a connecting portion that is a part of the insulator is interposed in the liquid seal vibration isolator. A first mounting bracket that is attached to either the vibration source or the vibration transmitting member, a second mounting bracket that is attached to the other side, and an insulator that is a vibration-proof elastic body that couples between the first mounting bracket and the second mounting bracket. In the manufacturing method of a liquid seal vibration isolator comprising a plurality of liquid chambers having the insulator as a part of a wall portion and a liquid passage connecting the liquid chambers,
By forming the insulator by integrating the first mounting bracket and the second mounting bracket, these three members are combined together, and the liquid chamber and the liquid passage are respectively opened outward. A first step of forming an integrally formed portion;
Thereafter, the integrally formed portion is put into the liquid, the open portions of the liquid chamber and the liquid passage are covered with a closing member, and the closing member is caulked and fixed with a caulking metal fitting previously integrated with the insulator. A process for producing a liquid seal vibration isolator characterized by comprising:

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