JPH08254240A - Liquid filling type mount - Google Patents

Abstract

PURPOSE: To reduce a dispersion of quality as well as to reduce and simplify the manufacturing manpower of a partition member in a liquid filling type mount. CONSTITUTION: A partition member 6 consists of a thick part 61a which is formed of rubber in a circular plate-like shape and arranged around a periphery, a movable film 61 having an engaging projection 61b projected in its center, and an orifice member 62 which is formed of resin in a ring-like shape by being integrally formed with the movable film 61 and holds the thick part 61a of the movable film 61 in its inner circumferential part without having contact.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid-filled mount for use in, for example, an automobile suspension system.

[0002]

2. Description of the Related Art Conventionally, a liquid is enclosed which has two liquid chambers in which the liquid is enclosed and which effectively damps vibrations by flowing the liquid through an orifice passage communicating with the two liquid chambers. Expression mounts are known. Such a liquid-filled mount includes a first mounting member attached to one mounting portion, a rubber elastic body having one end fixed to the first mounting member and having a recess on the other end side, and an outer periphery of the rubber elastic body. A bottomed cylindrical second mounting member that is connected to the second recess and forms a sealed space between the second mounting member and the rubber elastic body. And a diaphragm that divides the closed space into a liquid chamber in which a liquid is enclosed and an air chamber in which air is enclosed, and a peripheral end portion is retained by the second mounting member or the rubber elastic body. The chamber is divided into a main liquid chamber and a sub liquid chamber, and a partition member that forms an orifice passage that connects the main liquid chamber and the sub liquid chamber to each other at a peripheral end portion thereof.

The partition member used here is, for example, as shown in FIG. 8, a resin-made orifice member 81 formed in a ring shape having a central hole 81a and having an orifice groove 81b at its peripheral end portion. It is known that the peripheral surface of the central hole 81a is composed of a rubber movable film 82 whose peripheral end surface is vulcanized and adhered. Further, as another partition member, as shown in FIG. 9, a movable film made of a rubber-made movable film 84 formed in a plate shape and ring-shaped resin-made divided members 85a and 85b divided in two in the axial direction. It is also known that the peripheral end portion of 84 is composed of an orifice member 85 formed by welding while sandwiching the peripheral end portion between both split members 85a and 85b.

[0004]

However, the partition member shown in FIG. 8 requires a bonding step because the movable film 82 is integrated with the orifice member 81 by vulcanization bonding, and the number of manufacturing steps increases accordingly. There is the problem of complication.
Further, the movable film 82 contracts when the rubber is vulcanized and tensile stress acts on the adhesive surface, so that there is a problem that the strength is lowered and it is difficult to obtain a predetermined spring constant.

On the other hand, in the partition member shown in FIG. 9, since the orifice member 85 is composed of two divided members 85a and 85b, and the assembly process is required, the number of manufacturing steps is also large and the partition member is complicated. There's a problem. Also, when welding and assembling the two split members 85a and 85b,
Since the movable film 84 is crushed and deformed by the split members 85a and 85b, the movable film 84 is likely to be partially loosened. Therefore, it becomes difficult to obtain a predetermined spring constant of the movable film 84, and there is a problem that quality variation easily occurs.

The present invention has been devised in view of the above problems, and solves the problem of reducing the number of manufacturing steps of the partition member in the liquid-filled mount, simplifying it, and reducing the variation in quality. It should be an issue.

[0007]

A liquid-filled mount according to the present invention which solves the above-mentioned problems, includes a first mounting member, a cylindrical rubber elastic body whose inner peripheral side is fixed to the first mounting member, A second bottomed tubular fitting that is connected to the outer periphery of the rubber elastic body to form a closed space between the rubber elastic body and a peripheral end portion on the inner periphery of the second fitting or the rubber elastic body. And a diaphragm that divides the closed space into a liquid chamber in which a liquid is enclosed and an air chamber in which air is enclosed, and a peripheral end portion is retained by the second attachment or the rubber elastic body. A liquid-filled mount, comprising: a partition member that divides the chamber into a main liquid chamber and a sub liquid chamber, and a partition member that forms an orifice passage that connects the main liquid chamber and the sub liquid chamber to each other at a peripheral end portion of the chamber. The partition member includes a movable film made of rubber formed in a plate shape, and the movable film together with the movable film. And is characterized in that comprising a ring-shaped orifice member for clamping the peripheral portion in the unbonded of said movable film is formed of a resin by molding.

In a preferred aspect of the present invention, the movable film has a thick portion formed along a peripheral portion thereof, and the orifice member is formed so as to sandwich the thick portion. . As another preferred aspect, the movable membrane has an engaging portion that is engaged with a mold for molding the orifice member.

[0009]

In the liquid-filled mount according to the present invention, the orifice member of the partition member is integrally formed with the movable film so as to sandwich the peripheral edge of the movable film without adhering. As a result, when the partition member is manufactured, there is no need for a conventional bonding process or assembling process, and the number of manufacturing processes is reduced and simplified.

Further, since the movable film is sandwiched between the orifice members in a non-adhesive state, it is possible to avoid a decrease in strength and to easily obtain a predetermined spring constant, so that variation in quality is reduced. If the movable film has a thick portion formed along the peripheral edge thereof, and the orifice member is configured to sandwich the thick portion, the movable member contacts the inner wall surface of the thick portion. By arranging the molding die on the inner wall surface of the thick portion, the inner peripheral wall surface of the thick wall portion is pressed against and closely adhered to the mold surface by the molding pressure of the molten resin itself, so that the molten resin is prevented from flowing into the central portion. As a result, the orifice member can be favorably molded.

Further, if the movable membrane is provided with an engaging portion that is engaged with a molding die for molding the orifice member, the positioning becomes easy when the movable membrane is placed on the molding die.
The displacement and deformation of the movable film due to the molding pressure of the molten resin are prevented.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a sectional view of a liquid-filled mount according to this embodiment, FIG. 2 is a sectional view of a partition member according to this embodiment, FIG. 3 is a plan view of the partition member, and FIG. It is a bottom view of a partition member.

The liquid-filled mount of this embodiment is used as an engine mount of a vehicle, and is shown in FIG.
As shown in FIG. 1, a first mounting member 1, a rubber elastic body 2 whose inner peripheral side is fixed to the first mounting member 1, a tubular metal member 3 fixed to the outer periphery of the rubber elastic member 2, and a tubular metal member 3 A second mounting member 4 which is connected to the outer periphery of the second mounting member 4 to form a closed space between the rubber elastic member 2 and the inner periphery of the second mounting member 4;
The diaphragm 5 that divides the closed space into the liquid chamber 55 and the air chamber 57, the second mounting member 4 and the rubber elastic body 2 sandwich the peripheral end portion, and the liquid chamber 55 is divided into the main liquid chamber 55a and the sub liquid chamber 5.
5b, and a partition member 6 that forms an orifice passage 63 that connects the main liquid chamber 55a and the sub liquid chamber 55b to each other at the peripheral end of the partition member 6 as a main element.

The first mounting member 1 is fixed to a bracket on the engine side, and an upper end portion thereof is provided with a female screw portion 11 into which a mounting bolt (not shown) is screwed. The rubber elastic body 2 is formed in a substantially cylindrical shape having a recess opening to the lower end side by rubber, and its upper half portion is fixed to the outer circumference of the lower half portion of the first mounting member 1 by vulcanization adhesion. There is.

The tubular fitting 3 is fixed to the outer periphery of the lower end of the rubber elastic body 2 by vulcanization adhesion. The second mounting member 4 includes a cylindrical main body portion 41, a cylindrical large-diameter portion 43 extending upward from the upper end of the main body portion 41 via a step portion 42, and the main body portion 4
1 and a bottom plate 45 attached to the lower end of the diaphragm 1 via a holding frame portion 50 of the diaphragm 5 described later. The second mounting member 4 is connected to the outer periphery of the tubular member 3 by press-fitting the large-diameter portion 43 through the seal rubber layer 46, thereby forming a sealed space with the recess of the rubber elastic body 2. Has been formed.

The diaphragm 5 is formed of rubber into a substantially dome shape, and is integrally formed with a cylindrical holding frame portion 50 that holds the peripheral end portion thereof. The diaphragm 5 is arranged by adhering the holding frame portion 50 to the inner peripheral surface of the main body portion 41 of the second mounting member 4. As a result, the closed space formed by the recess of the rubber elastic body 2 and the second mounting member 4 is divided into the liquid chamber 55 in which the liquid L is enclosed and the air chamber 57 in which air is enclosed.

The partition member 6 is, as shown in FIGS.
A movable film 61 having a disc-shaped rubber-made thick-walled portion 61a provided on the peripheral portion and an engaging protrusion 61b protruding in the center of one surface, and a resin formed by integrally molding with the movable film 61. It is composed of a ring-shaped orifice member 62 for sandwiching the thick portion 61a of the movable film 61 in a non-adhesive manner. A flange portion 62a protruding in the centrifugal direction is formed at the upper end of the orifice member 62, and the flange portion 62a of the partition member 6 is formed by the step portion 42 of the second mounting member 2, the rubber elastic body 2 and the tubular member 3. It is arranged so as to be sandwiched by the lower end. As a result, the liquid chamber 55 is partitioned into a main liquid chamber 55a formed on the rubber elastic body 2 side and a sub liquid chamber 55b formed on the diaphragm 5 side.

Further, on the outer peripheral surface of the orifice member 62,
An orifice groove 62b is provided so as to make one round in the circumferential direction, and the outer peripheral side of the orifice groove 62b is the diaphragm 5.
The orifice passage 63 is formed by being closed by the holding frame portion 50. A first inlet / outlet 62c is provided at one end of the orifice groove 62b so as to communicate with the main liquid chamber 55a, and a second inlet / outlet 62d is provided at the other end thereof so as to communicate with the auxiliary liquid chamber 55b. It is provided.

The partition member 6 is manufactured as follows. First, as shown in FIG. 5, the movable film 61 formed into a predetermined shape by vulcanization molding is placed at a predetermined position in the injection molding die 7 for molding the orifice member 62. At this time, the engaging protrusion 61b provided on the movable film 61 is engaged with the one core mold 71 for restraining the movable film and positioned. Further, the core molds 71, 72 are arranged so as to contact the inner peripheral wall surface of the thick portion 61a formed on the peripheral portion of the movable film 61, whereby the thick portion 61a is formed by the molding pressure itself of the molten resin. The inner peripheral wall surface of the is closely adhered to the core molds 71 and 72 to prevent the molten resin from wrapping around to the central portion. Next, the thick portion 6 of the movable film 61
Molten resin is injected into the cavity 73 of the injection mold 7 that is formed so as to sandwich 1a, and the resin is solidified to form the orifice member 62. As a result, the partition member 6 shown in FIGS. 2 to 4 is completed.

In the liquid-filled mount of the present embodiment constructed as described above, the first mounting member 1 is fixed to the engine-side bracket through mounting bolts (not shown), and the second mounting member 4 is mounted. The main body portion 41 is press-fitted into a mounting hole provided on the vehicle body side and fixed, and is attached for use. The vibration in the high frequency range generated from the engine is effectively absorbed by the elastic deformation of the rubber elastic body 2, and the vibration in the low frequency range such as engine shake is
The liquid L that flows through the orifice passage 63 is effectively absorbed by the liquid column resonance action as the volumes of the main liquid chamber 55a and the sub liquid chamber 55b change.

As described above, according to the liquid-filled mount of this embodiment, the orifice member 62 of the partition member 6 is integrally molded with the movable film 61 so as to sandwich the peripheral portion of the movable film 61 without adhering. Because it is formed like
Since a conventional bonding process or assembling process is not required, the number of manufacturing steps can be reduced and simplified, the decrease in strength of the movable film 61 can be avoided, and a predetermined spring constant can be easily obtained. The quality variation can be reduced.

The movable film 61 in this embodiment has a thick portion 61a formed along the peripheral edge thereof, and the orifice member 62 is configured to sandwich the thick portion 61a. When forming the orifice member 62, it is possible to prevent the molten resin from flowing around to the central portion of the movable film 61, and to form the orifice member 62 favorably.

Further, since the movable film 61 of this embodiment is provided with the engaging projection 61b which is engaged with the injection mold 7 for molding the orifice member 62, the movable film 61 is formed on the injection mold 7. Positioning can be easily performed at the time of arranging, and it is possible to prevent the displacement and deformation of the movable film 61 due to the molding pressure of the molten resin, thereby stabilizing the molding.

Although the thick portion 61a of the movable film 61 in the above embodiment is formed by parallel surfaces, both sides of the thick portion 64a of the movable film 64 face inward as shown in FIG. The taper surface 64b can be made thin, and the thick portion 64a can be sandwiched by the orifice member 65 having the taper surface 65a that matches the taper surface 64b. This makes it difficult for the movable film 64 to drop off from the orifice member 65, and it is possible to cope with a larger vibration.

The movable membrane of the partition member according to the present invention is
The peripheral portion may not have a thick portion. When the orifice member is formed integrally with such a movable film, the movable film 67 is formed as shown in FIG. 7, for example.
Core dies 75 and 76 for restraining the movable membrane, which are arranged on both sides of the
It is possible to prevent the molten resin from wrapping around to the central portion by providing ring-shaped protrusions 75a and 76a on the peripheral edge of the above and pressing the movable film 67 from both sides by these protrusions 75a and 76a.

Further, in the above-mentioned embodiment, the engaging protrusion 61b is provided on the movable film 61 in order to easily position the movable film 61 when the movable film 61 is placed on the injection molding die 7. However, conversely, for example, an engagement pin may be provided on the injection mold side, and an engagement hole that engages with this engagement pin may be provided in the movable film.

[0027]

According to the liquid-filled mount of the present invention,
The partition member is composed of a rubber-made movable film formed in a plate shape, and a ring-shaped orifice member formed of resin by integrally molding together with the movable film and sandwiching the peripheral edge portion of the movable film without adhesion. Therefore, the number of man-hours for manufacturing the partition member can be reduced and simplified, and the variation in quality can be reduced.

If the movable film has a thick portion formed along the peripheral edge thereof, and the orifice member is configured to sandwich the thick portion, when forming the orifice member, It is possible to prevent the molten resin from flowing around to the central portion of the movable film, and to favorably form the orifice member. Further, if the movable membrane is provided with an engaging portion to be engaged with a mold for molding the orifice member, the movable membrane can be easily positioned when molding the orifice member, and its position It is possible to prevent the occurrence of displacement and deformation, and to stabilize the molding.

[Brief description of drawings]

FIG. 1 is a sectional view of a liquid-filled mount according to an embodiment of the present invention.

FIG. 2 is a sectional view of a partition member according to an embodiment of the present invention.

FIG. 3 is a plan view of a partition member according to the embodiment of the present invention.

FIG. 4 is a bottom view of the partition member according to the embodiment of the present invention.

FIG. 5 is a cross-sectional view showing a state in which a movable film is placed in an injection mold in an example of the present invention.

FIG. 6 is a sectional view of a partition member according to another embodiment of the present invention.

FIG. 7 is a cross-sectional view showing a state in which a movable film is placed in an injection mold according to another embodiment of the present invention.

FIG. 8 is a sectional view of a conventional partition member.

FIG. 9 is a cross-sectional view of another conventional partition member.

[Explanation of Codes] 1 ... First mounting metal fitting 2 ... Rubber elastic body 3 ... Cylindrical metal fitting 4 ... Second mounting metal fitting 5 ... Diaphragm 6 ... Partition member 55 ... Liquid chamber 55a ... Main liquid chamber 55b ... Sub liquid chamber 57 ... Air chamber
61 ... Movable film 61a ... Thick part 61b ... Engaging projection (engaging part) 6
2 ... Orifice member 62b ... Orifice groove 63 ... Orifice passage L
…liquid

Claims (3)

[Claims] 1. A first fitting, a cylindrical rubber elastic body whose inner peripheral side is fixed to the first fitting, and a rubber elastic body connected to the outer periphery of the rubber elastic body and hermetically sealed between the rubber elastic body. A bottomed cylindrical second fixture that forms a space, a liquid chamber in which a peripheral end portion is held by the inner periphery of the second fixture or the rubber elastic body, and a liquid is sealed in the closed space and air. A diaphragm which is divided into an enclosed air chamber and a peripheral end portion is held by the second attachment or the rubber elastic body, and the liquid chamber is partitioned into a main liquid chamber and a sub liquid chamber and at the peripheral end portion. A partition member that forms an orifice passage that communicates the main liquid chamber and the sub liquid chamber with each other,
In a liquid-filled mount comprising: the partition member, a movable film made of a rubber plate-shaped,
A liquid-filled mount, comprising a ring-shaped orifice member which is formed of a resin by integrally molding with the movable film and which holds the peripheral edge of the movable film in a non-adhesive manner. 2. The liquid according to claim 1, wherein the movable film has a thick portion formed along a peripheral edge portion thereof, and the orifice member is configured to sandwich the thick portion. Enclosed mount. 3. The liquid-filled mount according to claim 1, wherein the movable film has an engagement portion that is engaged with a molding die that molds the orifice member.