JP2002349631A - Liquid-sealed mount device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate assembly of a movable member and furthermore to reduce cost, while obtaining aimed function of vibrational absorption is obtained in a liquid-sealed mount device A formed with a connecting metal fitting 3, a received pressure chamber 18a and a balanced chamber 18b in the interior and arranging the movable member of an orifice board 15 to be easily built, between the received pressure chamber 18a and the balanced chamber 18b. SOLUTION: A center hole 20a and round holes 20c are formed on a base part 20 of the orifice board 15. The movable member is configured as a rubber elastic plate 24 which a membrane-like body part 24a including a thick part 24b in outer periphery and a connecting shaft 24c projecting from its center are integrally molded, and the connecting shaft 24c is inserted through the central hole 20 of the orifice board 15 and simultaneously enabling the thick part 24b in the outer periphery to be penetrated and abutted against the basic part 20 of the orifice board 15 and forming clearance of predefined distance between the body part 24a and the base part. The device are locked surely by a sticking part 20b, provided around peripheral edge of the center hole 20a on the orifice board 15, by providing it with an arrowhead-shaped hook part 24d on the tip of the connecting shaft 24c.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid chamber for elastically supporting a supported body such as a power train of an automobile with respect to a vehicle body and attenuating a vibration inputted from the supported body. Also, the present invention relates to a liquid ring mount device having an orifice passage, and particularly to a technical field of an arrangement structure of a movable member provided on a partition plate member of the liquid chamber so as to effectively absorb high frequency vibration.

[0002]

2. Description of the Related Art Conventionally, as this type of liquid ring mounting device, for example, Japanese Utility Model Publication No. 22225/1995 and Japanese Patent Publication No.
2. Description of the Related Art An automotive engine mount as disclosed in Japanese Patent Application Laid-Open No. 79580 is known. Each of these engine mounts includes a connection fitting connected to an engine or the like, and a support fitting that supports the connection fitting via a rubber elastic body, and has a volume that changes with the deformation of the rubber elastic body. By having a pressure receiving chamber and an equilibrium chamber communicated with the pressure receiving chamber by an orifice passage, by flowing the liquid between the pressure receiving chamber and the equilibrium chamber through the orifice passage,
Low frequency vibration generated from the engine during idling operation or the like can be effectively absorbed and attenuated.

In the former conventional example, a through hole is provided in a partition plate member for separating a pressure receiving chamber and an equilibrium chamber, and a stopper valve member is provided so as to be movable by a very small amount with respect to the through hole. are doing. The stopper valve member almost closes the through hole against the vibration of a relatively low frequency as described above to ensure the flow of the liquid in the orifice passage, while the high frequency generated during the high-speed operation of the engine or the like. With the through hole almost open for the vibration of
The liquid in the pressure receiving chamber is allowed to flow from the through hole to the equilibrium chamber, thereby absorbing fluctuations in the liquid pressure in the pressure receiving chamber.

[0004] On the other hand, in the case of the latter conventional engine mount, a through hole is provided in the partition plate member for separating the pressure receiving chamber and the equilibrium chamber in the same manner as in the former conventional example, and a predetermined minute hole is formed in the through hole. The movable plate is mounted in a state where the movable plate can be displaced by an amount, and the movable plate closes the through hole of the partition plate member with respect to low-frequency vibration, while the movable plate is closed with respect to high-frequency vibration by a minute displacement of the movable plate. A small change in the volume of the pressure receiving chamber can be absorbed.

[0005]

However, in the case of the above-mentioned prior art, a movable member (movable plate or stopper valve member) formed by assembling a plurality of parts made of resin or rubber is attached to the partition plate member. There is a problem that the work for this is very troublesome. That is, in general, it is preferable that the movable member does not substantially operate in response to the input of the low-frequency vibration, in order to effectively attenuate the predetermined low-frequency vibration by the orifice passage. When a high-frequency minute vibration is input, the movable member must operate smoothly by a minute amount corresponding to the amplitude or the like.

For this reason, when a movable member is formed by combining a plurality of parts so as to be sandwiched from both sides of a partition plate member as in the above-mentioned two conventional examples, a manufacturing error of each of the parts and an error in assembling the parts are required. If the error or the like becomes large, the absorption characteristics of high-frequency vibration due to the operation of the movable member may be impaired, or the damping characteristics of low-frequency vibration due to the orifice passage may be adversely affected. This is because, when assembling a plurality of parts of the movable member, the distance between them and the weight balance must be adjusted with extremely high precision.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object of the present invention is to devise a structure of a movable member provided on a partition plate member of a liquid chamber in a liquid ring mounting device. An object of the present invention is to make it possible to obtain an intended vibration absorbing function and to reduce costs while allowing the movable member to be easily assembled to the partition plate member.

[0008]

In order to achieve the above-mentioned object, according to a solution of the present invention, a through hole is formed in a substrate portion of a partition plate member of a liquid ring mount device, and the through hole is formed integrally with a rubber material. An elastic plate is disposed so as to cover the through-hole, and the film-shaped main body of the elastic plate is elastically deformed to absorb a change in volume of the pressure receiving chamber while receiving a low-frequency With respect to the vibration, the deformation of the elastic plate is regulated by the partition plate member itself.

More specifically, according to the first aspect of the present invention, the connecting fitting connected to the supported member and the supporting fitting supporting the connecting fitting via a rubber elastic body are separated from each other in the main vibration input direction. And a partition plate for forming a liquid chamber between the connection fitting and the support fitting so that the volume changes with the deformation of the rubber elastic body, and further partitions the liquid chamber into a pressure receiving chamber and an equilibrium chamber. A liquid seal provided with a member, an orifice passage communicating with the pressure receiving chamber and the equilibrium chamber, and a movable member operable to absorb a minute change in the volume of the pressure receiving chamber with respect to the partition plate member; Assume a mounting device.

[0010] A through hole is formed in the substrate portion of the partition plate member so as to communicate the pressure receiving chamber and the equilibrium chamber, and as the movable member, the pressure receiving chamber side of the substrate portion or the balancing portion covers the through hole. An elastic plate disposed on any one side of the chamber, comprising a film-shaped main body, a thick portion formed over the entire outer periphery thereof, and a partition plate substantially at the center of the main body. And a connecting shaft protruding toward the substrate of the member, which are integrally formed of a rubber material. Then, the thick portion of the elastic plate is brought into contact with the substrate portion of the partition plate member to form a gap between the substrate portion and the main body of the elastic plate, and the elastic plate is connected to the substrate portion. The shaft is slidably connected by a predetermined distance in a penetrating state.

With the above-described structure, in the liquid ring mount device according to the present invention, for example, low-frequency vibration generated in a supported body such as an automobile engine acts on the rubber elastic body via the connecting member, and When the body is deformed and the volume of the pressure receiving chamber changes, the liquid flows through the orifice passage between the pressure receiving chamber and the equilibrium chamber, thereby absorbing and attenuating vibration. At this time, since the deformation of the elastic plate main body covering the through-hole of the partition plate member is regulated by the substrate portion of the partition plate member, the deformation of the elastic plate prevents the orifice passage from absorbing and damping the vibration. No significant adverse effects. On the other hand, when high-frequency vibration is input from the supported body and the volume of the pressure receiving chamber changes by a small amount in a short cycle, the main body of the elastic plate is deformed in response to the small volume change, The change in volume of the pressure receiving chamber is effectively absorbed.

In the present invention, since the elastic plate is integrally formed of a rubber material, the number of parts is small, and the elastic plate can be easily assembled to the partition plate member, thereby reducing the manufacturing cost. With
If the elasticity of the elastic plate body is adjusted accurately,
Even if an error in assembling becomes large to some extent, the high frequency vibration absorbing action can be reliably obtained. That is, the intended vibration absorbing function can be obtained while the assembling of the elastic plate to the partition member is much easier than before.

According to the second aspect of the present invention, the connecting shaft of the elastic plate is inserted into the insertion hole formed in the substrate portion of the partition plate member so as to penetrate the substrate portion from one side to the other side, and the connection is made. On the distal end side of the shaft, an arrow-shaped locking portion projecting outward from the outer periphery thereof and narrowing toward the distal end is provided, while the base of the locking portion is provided on the periphery of the insertion hole on the other side of the partition plate member. It is assumed that the protrusion is formed so as to correspond to the shape on the end side.

[0014] In this configuration, since an arrowhead-shaped locking portion is provided on the distal end side of the connecting shaft of the elastic plate, and is tapered toward the distal end, the connecting shaft is inserted into the insertion hole of the board portion of the partition plate member. And can be easily inserted. On the other hand, when the connecting shaft is inserted into the insertion hole in this manner, the locking portion provided on the distal end side of the connecting shaft is securely locked by the protrusion formed on the periphery of the insertion hole. . With this,
Even with a simple structure in which the connecting shaft is simply inserted into the insertion hole, the elastic plate can be reliably prevented from falling off.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 show a liquid ring mounting apparatus A according to an embodiment of the present invention.
Is interposed between the power train and the vehicle body of a vehicle (not shown), supports the load of the power train, and attenuates vibration generated in the power train,
It suppresses transmission of vibrations to the vehicle body side and thus to the vehicle interior. That is, as shown in the drawing, the schematic configuration of the liquid ring mounting device A is such that the cylindrical metal casing 1 extends in the vertical direction (the axis Z direction which is the main vibration input direction) in which the load from the power train is input. And three brackets 2 welded to the lower outer periphery of the casing 1
Attach it to the body frame by 2 and 2. On the other hand, the lower part of the connecting fitting 3 extending in the vertical direction is inserted into the upper end side of the casing 1 to connect the upper end of the connecting fitting 3 to the mount bracket B on the power train side. A substantially frustoconical rubber elastic body 4 is provided between the lower portion and the casing 1 so as to radially expand from the lower portion toward the inner peripheral surface of the casing 1 and extend obliquely downward. Become.

The casing 1 has a cylindrical support cylinder 5 (support bracket) for supporting the connection fitting 3 from below through the rubber elastic body 4, and a cylindrical shape slightly smaller in diameter than the support cylinder 5. And a stopper 6 fixed to the upper end of the support cylinder 5 with a flange 6a formed at the lower end. That is, the support cylinder 5 is provided with the inner cylinder member 7 on the inner peripheral side.
And a plurality of (eight in the illustrated example) claws 9, 9 projecting further upward from the upper end edge of the outer cylinder member 8 at the upper end thereof. ,…
Are provided at predetermined intervals in the circumferential direction, and each claw portion 9 is bent inward to crimp the flange 6 a of the stopper fitting 6 to the upper end edge of the inner cylinder member 7. On the other hand, at both lower end edges of the inner cylinder member 7 and the outer cylinder member 8, annular inner peripheral flanges 7 a extending to the inner peripheral side are provided.
8a are formed, and the inner peripheral flange 7 of the inner cylindrical member 7 is formed.
a is caulked from below by the inner peripheral flange 8 a of the outer cylinder member 8.

The connecting fitting 3 has a shape of an inverted truncated cone converging downward, and has a disk-shaped stopper portion 1 protruding radially outward from the outer periphery of the large-diameter end.
0 is formed, and the connecting shaft portion 11 is formed so as to extend upward along the axis Z from a substantially central portion of the end surface on the large diameter side. A bolt hole 12 is formed in the upper end surface of the connecting shaft portion 11 so as to extend downward from the substantially central portion along the axis Z. Although not shown, a mounting bolt screwed into the bolt hole 12 is provided. Thereby, the mount bracket B on the power train side is fastened to the upper end of the connection fitting 3.

The stopper 10 of the connecting fitting 3
Constitutes a stopper mechanism that regulates excessive displacement of the power train in cooperation with the stopper fitting 6 and the like. That is, the upper end of the stopper 6 is connected to the stopper 10 of the connection fitting 3 and the mounting bracket B on the power train side.
And an annular wall portion 6b extending substantially horizontally toward the inner peripheral side so as to surround the outer periphery of the mounting shaft 11 of the connection fitting 3 therefrom. The lower surface of the annular wall portion 6b faces the upper surface of the stopper portion 10 of the connection fitting 3, while the upper surface of the annular wall portion 6b faces the mount bracket B on the power train side. A stopper rubber 13 composed of a thick annular rubber layer is vulcanized and bonded to both upper and lower surfaces of 6b.

The stopper rubber 13 has an upper rubber layer 13a formed on the upper surface of the annular wall 6b so as to swell upward over the entire circumference, and similarly has a swelling downward on the lower surface of the annular wall 6b. Lower rubber layer 13 formed to
b, when a load of a normal power train is supported, a predetermined gap is formed between the upper end of the upper rubber layer 13a and the mount bracket B facing above the upper rubber layer 13a. A predetermined space is formed between the lower end of the layer 13b and the upper surface of the stopper 10 facing the lower side. The contact between the upper rubber layer 13a and the mount bracket B regulates the relative displacement of the power train in the bounding direction, and the contact between the lower rubber layer 13b and the stopper portion 10 reduces the power. The relative displacement of the train in the rebound direction is regulated.

On the other hand, the upper inner periphery of the rubber elastic body 4 is vulcanized and bonded to the lower side of the connecting fitting 3 over the entire peripheral surface of the truncated cone. The upper outer periphery of the rubber elastic body 4 is a conical surface which is tapered upward, and a cylindrical portion having a hollow portion 14 therein is formed below the conical surface. Also,
The upper portion of the inner cylinder member 7 of the support cylinder 5 is embedded in the cylindrical portion, and they are integrally vulcanized and adhered. A thin rubber layer 4a extending downward from the lower edge of the rubber elastic body 4 is vulcanized and bonded to the peripheral surface.

And, on the inner peripheral surface of the thin layer portion 4a,
As will be described in detail later, an orifice disk 15 (partition plate member) having a substantially thick disk shape is press-fitted from below, and further covers the entire lower side of the orifice disk 15 from below. The lower end opening of the hollow portion 14 of the rubber elastic body 4 is liquid-tightly closed by the diaphragm 16. That is, the diaphragm 16 is a rubber film member, and a ring-shaped reinforcing plate 17 is embedded in a relatively thick outer peripheral portion 16a. Superposed on the upper surface of the inner peripheral flange 7a formed at the lower edge of
It is caulked together with the inner peripheral flange 7a by the inner peripheral flange 8a of the outer cylinder member 8.

A buffer solution such as ethylene glycol is sealed in the hollow portion 14 of the rubber elastic body 4 closed by the diaphragm 16 as described above, and absorbs vibration of the power train input to the rubber elastic body 4. A liquid chamber 18 for relaxation is formed. The interior of the liquid chamber 18 is vertically partitioned by the orifice board 15, and the upper side is a pressure receiving chamber 18 a whose volume increases or decreases with the deformation of the rubber elastic body 4, and the lower side is the deformation of the diaphragm 16. The pressure is increased or decreased by the pressure receiving chamber 18.
The balance chamber 18b absorbs a change in volume at a.

More specifically, as shown in FIGS. 3 and 4, the orifice disk 15 includes a disk-shaped substrate portion 20 and a peripheral wall portion 2 that hangs down from the outer peripheral edge of the substrate portion 20 to the entire circumference.
1 and an outer peripheral flange portion 22 extending outward from the outer peripheral surface of the peripheral wall portion 21, and these are integrally formed of synthetic resin. The outer peripheral flange portion 22 includes annular plate-like wall portions 22a and 22b formed on both upper and lower edges of the peripheral wall portion 21 over the entire circumference, respectively.
Intermediate wall portion 22c formed substantially parallel between 2a and 22b
At a predetermined location in the circumferential direction, the upper wall 2
2a, a substantially rectangular upper opening 2 penetrating vertically.
2d is formed.

The intermediate wall portion 22c has a substantially C-shape as a whole when viewed from the up and down direction. One end in the circumferential direction is bent upward at a position corresponding to the opening portion 22d, and the upper wall portion 22a is formed. It extends obliquely to the lower surface and communicates with the periphery of the upper opening 22d. On the other hand, the intermediate wall portion 22c
The other end in the circumferential direction is bent downward, and extends obliquely to the upper surface of the lower wall portion 22b in parallel with the inclined portion on the one end side, and the lower opening 2 is formed in the peripheral wall portion 21 adjacent to the inclined portion.
1a is open. In other words, two parallel opening grooves are formed on the outer periphery of the peripheral wall portion 21 of the orifice board 15 by the outer peripheral flange portion 22, and they communicate with each other in the middle to form a spiral opening groove that makes two rounds vertically. ing.

The orifice board 15 is press-fitted into the inner cylinder member 7 of the support cylinder 5 as described above,
A double spiral orifice passage 23 is formed between the thin layer portion 4a on the inner circumference of the inner cylinder member 7 and the opening groove on the outer circumference of the orifice board 15. The upper end of the orifice passage 23 is the upper opening 22d,
On the upper surface of the pressure-receiving chamber 18a, the lower end of the orifice passage 23 is the lower opening 21a, which is open to the side of the balancing chamber 18b. The buffer solution in the pressure receiving chamber 18a and the buffer solution in the equilibrium chamber 18b flow through each other via the orifice passage 23, so that low-frequency vibrations acting on the pressure receiving chamber 18a from the rubber elastic body 4 can be effectively absorbed and attenuated. It has become.

The substrate section 20 of the orifice board 15
A central hole 20a (insertion hole) having a circular cross section penetrating in the vertical direction at a substantially central portion is formed at the periphery of the lower opening of the central hole 20a. Are formed, and a plurality of (six in the illustrated example) round holes 20c, 20c,... (Through holes) slightly smaller in diameter than the center hole 20a surround the center hole 20a. Penetration is formed at equal intervals in the circumferential direction.
A disc-shaped rubber elastic plate 24 is disposed on the surface (upper surface in the drawing) of the substrate section 20 on the side of the pressure receiving chamber 18a so as to cover all of the round holes 20c, 20c,... From above.

The rubber elastic plate 24 is a film-shaped main body portion 24a designed so that a disk-shaped portion except for a substantially central portion and an outer peripheral portion has a predetermined elastic coefficient and an internal loss. A thick portion 24b is formed on the outer periphery of the main body portion 24a over the entire circumference, and the orifice plate extends from a substantially central portion of the main body portion 24a in a direction substantially orthogonal to the main body portion 24a. Connection shaft 2 having a circular cross section having an outer diameter slightly smaller than the inner diameter of the 15 center holes 20a.
4c is protruded. And the main body 24a,
The thick portion 24b and the connecting shaft 24c are integrally formed by vulcanization using a rubber material mainly composed of natural rubber. An arrow-shaped locking portion 24d is integrally formed on the tip end side of the connection shaft 24c, and the locking portion 24d is
5 is locked by an annular projection 20b on the lower surface of the substrate portion 20.

That is, as shown in FIG. 4, the rubber elastic plate 24 is positioned substantially coaxially above the orifice board 15, and the connecting shaft 24c of the rubber elastic plate 24 is inserted into the center hole 20a of the substrate 20 of the orifice board 15. When inserted from above, the locking portion 24d at the tip of the connecting shaft 24c
Is temporarily pressed into the center hole 20a after being elastically deformed so as to shrink, and then passes through the center hole 20a from above to below, then returns to the original shape again, and returns to the original shape.
The lower surface is locked to the projection 20b (see FIG. 1).

More specifically, the proximal end surface (upper surface in the figure) of the arrowhead-shaped engaging portion 24d of the connecting shaft 24c is retracted toward the proximal end from the outer peripheral surface of the connecting shaft 24c toward the outer peripheral side. That is, in other words, while the inner peripheral side has a mortar shape depressed toward the inner peripheral side, the protrusion 20b on the lower surface of the substrate portion 20 corresponds to the mortar shape on the base end side of the locking portion 24d,
It has an inverted truncated cone shape that protrudes more toward the inner circumference. Since the shapes of the two are matched to each other, the locking portion 24d of the connecting shaft 24c is securely locked by the projection 20b, and the connecting shaft 24c is fixed to the center hole 20a. By simply inserting the rubber elastic plate 24, the rubber elastic plate 24 can be securely mounted on the substrate portion 20 of the orifice board 15 and can be prevented from falling off.

As described above, the rubber elastic plate 24
Is mounted on the substrate section 20 of the orifice board 15,
The lower surface of the thick portion 24b on the outer periphery of the rubber elastic plate 24 abuts on the upper surface of the substrate portion 20 of the orifice plate 15, while the thickness between the main body portion 24a of the rubber elastic plate 24 and the substrate portion 20 of the orifice plate 15 is maintained. A gap (for example, about 0.2 mm to 0.5 mm) having a predetermined distance corresponding to the thickness of the meat portion 24b is formed. Therefore, the portion of the main body 24a near the inner periphery can be elastically bent so as to approach the substrate 20 of the orifice board 15, and at this time, the connecting shaft 24c
Slides along the center hole 20a by the predetermined distance.

The rubber elastic plate 2 as described above
With the arrangement of 4, when high-frequency vibration acts on the pressure receiving chamber 18a from the rubber elastic body 4, the main body 24a of the rubber elastic plate 24 elastically bends and deforms in response to the high-frequency vibration. The small change in the volume of the pressure receiving chamber 18a is absorbed.

Therefore, according to the liquid ring mounting apparatus A according to this embodiment, first, when a large-amplitude vibration having a relatively low frequency acts on the connecting member 3 from the power train during an idling operation of the engine or the like, The rubber elastic body 4 is greatly deformed, and the buffer solution in the pressure receiving chamber 18a and the buffer solution in the equilibrium chamber 18b mutually flow through the orifice passage 23, and the vibration is absorbed and attenuated by the flow resistance at this time. At this time, the body portion 20 of the rubber elastic plate 24 disposed on the substrate portion 20 of the orifice board 15 is elastically deformed between the substrate portion 20 and the fluid pressure in the pressure receiving chamber 18a. However, since the deformation of the rubber elastic plate body 20 is restricted by the substrate 20 of the orifice board 15, the adverse effect on the vibration absorption and damping effect by the orifice passage 23 is minimized.

On the other hand, when a vibration of a relatively high frequency and a small amplitude generated in the power train acts on the connecting member 3 at the time of high-speed operation or acceleration operation of the engine, the rubber elastic body 4 receiving the vibration Due to slight deformation, pressure receiving chamber 1
At this time, the body portion 24a of the rubber elastic plate 24 is elastically deformed following the high frequency vibration, so that a small change in the volume of the pressure receiving chamber 18a is absorbed, and the power Transmission of high frequency vibration from the train to the vehicle body is effectively cut off. That is, it is possible to reduce the dynamic spring constant with respect to minute vibration in a high frequency range, and to suppress transmission of this vibration into the vehicle interior.

In this embodiment, the elastic plate 24 made of rubber is integrally molded so as to cover the round holes 20c of the substrate portion 20 of the orifice board 15 described above.
Is mounted, the number of parts is reduced, the work of attaching to the orifice board 15 becomes extremely easy, and the manufacturing cost is reduced. Moreover, the vibration damping characteristic of the rubber elastic plate 24 does not require an excessively high precision in the clearance between the movable plate and the orifice plate unlike the conventional one using a movable plate. If the elasticity and the damping characteristic of the main body 20 of the plate 24 are accurately adjusted, the above-described high-frequency vibration absorbing action can be reliably obtained even when an error in assembling is large to some extent.

That is, according to the liquid seal mounting apparatus A of the present invention, the rubber elastic plate 24
The required high-frequency vibration absorbing function can be sufficiently obtained while making the assembly of the device much easier than before.

(Other Embodiments) The configuration of the present invention is not limited to the above-described embodiment, but includes other various configurations. That is, in the above-described embodiment, the rubber elastic plate 24 is mounted from the pressure receiving chamber 18a side to the orifice board 15 that partitions the liquid chamber 18 of the liquid ring mounting device A into the pressure receiving chamber 18a and the equilibrium chamber 18b. Conversely, for example, as shown in FIG. 5, the rubber elastic plate 24 may be mounted from the equilibrium chamber 18b side.

As shown in FIG. 5, a rubber elastic plate 2
The projection 20b for locking the locking portion 24d of the fourth connection shaft 24c may not be formed.

Further, the structure of the orifice board itself is not limited to the one of the above-described embodiment, and for example, FIG.
The structure shown in FIG. In the drawing, the orifice board 25 has a hat-shaped resin outer member 26 and a hat shape having a slightly smaller diameter than the outer member 26, and is made of a steel plate pressed into the inside of the outer member 26. An orifice passage 28 is formed between the outer member 26 and a step portion 27b formed over the entire outer periphery of the board portion 27a of the inner member 27 thus combined. Is formed. One end in the circumferential direction of the orifice passage 28 communicates with a cocoon-shaped opening 27c provided in the step 27b of the inner member 27, while the other end of the orifice passage 28 is provided in the substrate 26a of the outer member 26. It communicates with the cocoon-shaped opening 26b. And
The board portions 26 of both the outer member 26 and the inner member 27
a, 27a so that the center holes 26c, 2
7d, and a plurality of (six in the illustrated example) round holes 26d, 26d,..., 27e, 27 are formed around the center holes 26c, 27d so as to penetrate both members 26, 27.
are formed at regular intervals in the circumferential direction.

Further, the liquid ring mounting apparatus A according to the present invention is characterized in that the main vibration input direction is set to the vertical direction,
And the support cylinder 5 is arranged to be vertically separated from each other, but is not limited to this. For example, the connection fitting 3 and the support cylinder 5 may be arranged to be substantially horizontally separated from each other. .

Further, the liquid ring mount device according to the present invention comprises:
The present invention can be applied not only to the engine mount as in the above-described embodiment and the like, but also to various parts of an automobile such as a cab mount and a body mount, and can also be applied to various vibration generating parts other than the automobile.

[0042]

As described above, according to the liquid ring mounting apparatus according to the first aspect of the present invention, the pressure receiving chamber and the equilibrium chamber are connected to the partition plate member for partitioning the liquid chamber into the pressure receiving chamber and the equilibrium chamber. When providing an orifice passage communicating with the movable member that operates to absorb a minute change in the volume of the pressure receiving chamber,
While forming a through hole in the substrate portion of the partition plate member,
An elastic plate formed by integrally molding a rubber material is disposed so as to cover the through-hole, and the elastic deformation of the elastic plate can absorb high-frequency minute vibrations. Is restricted by the partition member, and the adverse effect on the vibration absorption and damping action by the orifice passage can be sufficiently suppressed. Further, by connecting the connecting shaft integrally formed on the elastic plate to the insertion hole of the partition plate member and connecting it, it is possible to obtain the intended vibration absorbing function while making the mounting work of the rubber elastic plate extremely easy. be able to.

According to the second aspect of the present invention, an arrow-shaped locking portion is provided on the distal end side of the connecting shaft of the elastic plate, and a projection is formed on the periphery of the insertion hole so as to correspond to the shape of the locking portion. Since the elastic plate is formed, the elastic plate can be more easily attached to the partition plate member, and can be reliably prevented from falling off.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a configuration of a liquid ring mounting device according to an embodiment of the present invention.

FIG. 2 is a top view of the liquid ring mounting device.

3A is a top view of an orifice board, and FIG. 3B is a front view.

FIG. 4 is a perspective view showing attachment of a rubber elastic plate to an orifice board.

FIG. 5 is a diagram corresponding to FIG. 1 in a case according to another embodiment in which a rubber elastic plate is attached to an orifice board from the equilibrium chamber side.

6A is a top view and FIG. 6B is a longitudinal sectional view showing a modification of the orifice board.

[Explanation of Symbols] A Liquid seal mounting device B Mount bracket on power train side (supported body) Z axis 3 Connecting member 4 Rubber elastic body 5 Support cylinder (support bracket) 7 Inner cylinder member (support bracket) 8 Outer cylinder Members (supporting fittings) 15, 25 Orifice board (partition plate member) 18 Liquid chamber 18a Pressure receiving chamber 18b Equilibrium chamber 20, 26a, 27b Board sections 20a, 26c, 27d of orifice board Center holes (insertion holes) 20b Projections 20c, 26d, 27e Round hole (through hole) 23, 28 Orifice passage 24 Rubber elastic plate 24a Main body 24b Thick part 24c Connecting shaft 24d Locking part

Continuation of the front page F term (reference) 3D035 CA05 3J047 AA03 CA06 CB03 CD08 DA01 FA02

Claims (2)

[Claims] 1. A connecting fitting connected to a supported body and a supporting fitting supporting the connecting fitting via a rubber elastic body,
A liquid chamber is formed between the connecting metal fitting and the supporting metal fitting so as to be spaced apart from each other in the main vibration input direction so that the volume thereof changes with the deformation of the rubber elastic body. A partition plate member for partitioning the pressure receiving chamber and the equilibrium chamber, and an orifice passage communicating the pressure receiving chamber and the equilibrium chamber, and operating to absorb a minute change in the volume of the pressure receiving chamber. In the liquid seal mounting device provided with a movable member, a through hole is formed in the substrate portion of the partition plate member so as to communicate the pressure receiving chamber and the equilibrium chamber, and the movable member covers the through hole. An elastic plate disposed on one side of the pressure receiving chamber side or the equilibrium chamber side of the substrate portion, wherein the film-shaped main body portion, a thick portion formed over the entire outer periphery thereof, From the approximate center of the main body to the board of the partition plate And a connecting shaft which projects I,
They are integrally formed of a rubber material, and the thick portion of the elastic plate and the substrate portion of the partition plate member are in contact with each other to form a gap between the substrate portion and the main body of the elastic plate. And a connecting shaft of the elastic plate is slidably connected to the substrate by a predetermined distance in a penetrating state. 2. The connecting shaft according to claim 1, wherein the connecting shaft of the elastic plate is inserted into an insertion hole formed in the substrate of the partition plate member so as to penetrate the substrate from one side to the other. At the distal end of the connecting shaft, there is provided an arrow-shaped locking portion that protrudes outward from the outer periphery and narrows toward the distal end, and is provided at the periphery of the insertion hole on the other side of the partition plate member. A liquid ring mount device, wherein a protrusion is formed so as to correspond to a shape of a base end side of the portion.