JP2000193011A - Viscous liquid enclosing damper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid enclosing damper which has neither restriction in the structure, deburring work to be required, nor structural complexity, and which can easily be manufactured. SOLUTION: A lid 3 is welded to the container body 2 with welding ribs 4, and a viscous fluid is enclosed in the container to absorb vibrations between a support and an object to be supported. A storage part 8 for keeping the material eluted from the welding rib 4 in welding is formed outside the welding rib 4 at least on either abutting surface 7 of the container body 2 or of the lid 3. Therefore, even though the molten material of the welding rib 4 flows from the abutting surface 7 when the lid 3 is welded to the container body 2, the molten material is saved in the storage part 8 and will never overflow to outside to make burrs.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a viscous liquid sealing damper for enclosing a viscous liquid therein, absorbing vibration between a support and a supported object, and isolating the supported object from vibration.

[0002]

2. Description of the Related Art A viscous liquid-filled damper is attached between, for example, an electronic device incorporated in a vehicle, and absorbs vibrations caused by an engine or running of the vehicle so that the vibration is not directly transmitted to the electronic device. is there. The viscous liquid sealing damper encloses a fluid having a specific viscosity such as silicone oil in a sealed container, and absorbs the vibration based on the viscous flow of the viscous liquid. The sealed container of the viscous liquid-enclosed damper is usually manufactured separately from the container main body and the lid, and the viscous liquid is put into the container main body. It is formed by welding.

The state of the viscous liquid-filled damper 25 is as follows.
As shown in FIG. 8, the lid 23 having the welding rib 22 is fitted to the mating surface 21 of the container body 20, and the welding rib 22 is melted by irradiating an ultrasonic wave with an ultrasonic welding machine.
0 and the lid 23 are welded. However, FIG.
As shown in (1), the molten material of the welding rib 22 protrudes from the joint 21 between the container body 20 and the lid 23 and forms a burr 24. For this reason, in order to prevent the adverse effects of the burrs 24, it is necessary to perform a deburring operation as a finish of the viscous liquid filled damper 25.

As shown in FIG. 10, a viscous liquid-filled damper 35 that solves such disadvantages is provided with a fitting recess 32 in one of the periphery of the opening of the container body 30 and the periphery of the opening of the lid 31. Is fitted to one of the other
When the fitting protrusions 33 are fitted into the fitting recesses 32, welding is performed at predetermined small intervals 34 to prevent the above-mentioned protrusion from being caused by the minute intervals 34 (Japanese Patent Publication No. Hei 7-76). -88867).

[0005]

However, in the above-mentioned conventional example, the container main body has a problem in that, for example, the dimensions are not sufficient, and it is difficult to provide a fitting concave portion or a fitting convex portion structurally. There is a case where the fitting concave portion 32 and the fitting convex portion 33 cannot be provided around the opening around the opening 30 and around the opening around the lid 31, and there is a problem that such a case cannot be dealt with. Further, since it is necessary to provide the fitting concave portion 32 or the fitting convex portion 33 on both the container body 30 and the lid body 31, there is a problem that the manufacturing of the damper 35 becomes complicated accordingly.

SUMMARY OF THE INVENTION An object of the present invention is to provide a viscous liquid-filled damper which can be manufactured easily without any restrictions on the structure and without any deburring work or structural complexity.

[0007]

Means for Solving the Problems The present invention has been proposed to achieve the above object, and has the following structure. That is, according to the present invention, in the viscous liquid sealing damper in which the joining of the container body and the lid is performed by melting the welding rib formed at the joining portion and the fluid is sealed therein, A viscous liquid-filled damper is provided, wherein a housing is provided outside at least one mating surface of the lid from the welding rib to store a melt of the welding rib eluted during welding.

Further, according to the present invention, there is provided the above-mentioned viscous liquid-enclosed damper in which the accommodation portion is formed in a groove shape.

Further, according to the present invention, there is provided the above viscous liquid-filled damper, wherein the housing portion is formed by chamfering the joint end surface of the container body and / or the lid.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view before assembling a viscous liquid-enclosed damper showing an embodiment of the present invention, and FIG. 2 is a cross-sectional view after assembling a viscous liquid-enclosed damper showing an embodiment of the present invention. In the figure, a viscous liquid sealing damper 1 is formed by welding a lid 3 to a container body 2 by melting a welding rib 4 and enclosing a viscous liquid 6 in an interior 5 thereof. The viscous liquid sealed inside the container body has a function of absorbing vibration between the support and the supported object, and both the container body 2 and the lid 3 have mating surfaces 7. And / or, outside the welding ribs 4 on the mating surface 7 of the lid 3, a housing portion 8 for storing a molten material of the welding ribs 4 that is melted at the time of welding is provided.

The container body 2 has a protruding portion 10 at the center of the bottom, and the protruding portion 10 has a recess 11.
1 has a structure in which one of the shafts of the support and the supported object can be fitted. This protrusion 10
Is integrally supported by a rigid cylindrical body 12 by a soft and flexible flexible bottom material 13. The upper part of the cylindrical body 12 is a flange 14.

The lid 3 is usually formed in a rigid disk shape, and a ring-shaped welding rib 4 is provided concentrically on the disk. Further, on the disk outside the ring-shaped welding rib 4, the accommodating portion 8, that is, a U-shaped groove 15 is provided concentrically as a specific structure.

The cylindrical body 12, the upper flange 14 and the lid 3 of the container body 2 are made of the same hard synthetic resin material. The protrusion 10 and the flexible bottom 13 of the container body 2 are made of a thermoplastic elastomer. The thermoplastic elastomer is appropriately selected in consideration of the required flexibility, the properties of the fluid 6 to be enclosed, the adhesion of the selected cylindrical body 12 to the hard synthetic resin material, and the like.

The viscous liquid-filled damper 1 is manufactured as follows. First, the cylindrical body 12 of the container body 2 and the upper flange 14 are integrally formed of the same hard synthetic resin material. Next, the projecting portion 10 of the container body 2
The flexible bottom 13 is formed of a thermoplastic elastomer, and the flexible bottom 13 is fixed to the lower surface of the cylindrical body 12 to form the container body 2. On the other hand, the lid 3 is formed so that the ring-shaped welding rib 4 and the U-shaped groove 15 are concentric on the disk.

A viscous liquid 6 such as silicone oil is injected into the container body 2 manufactured as described above and filled. Thereafter, the mating surface 7 of the lid 3, that is, the one having the welding rib 4 and the U-shaped groove 15 is placed on the mating surface 7 of the container body 2, and is sealed by ultrasonic welding. At this time, the molten material of the welding ribs 4 tries to protrude outside from the joint 7 between the container body 2 and the lid 3, but does not enter the U-shaped groove 15 to be welded to form burrs. The result is increased strength. Therefore, it is not necessary to perform a deburring operation as a finish of the viscous liquid-filled damper 1 in order to prevent adverse effects due to burrs.

The obtained viscous liquid-filled damper 1 is fitted with, for example, a shaft portion of a mounting portion of an automobile serving as a support in a recess 11 of a projecting portion 10 of a container body 2, and is mounted on an upper surface of a lid 3. Attach the supported CD player or
Alternatively, by mounting the upper surface of the lid on the supporting object side and mounting the container body on the supported object side, it absorbs vibrations caused by the engine of the automobile or vibrations caused by running, and the sound of the CD player is skipped. Etc. can be prevented.

FIG. 3 is a cross-sectional view of a viscous liquid-filled damper showing another embodiment of the present invention. The difference between this viscous liquid-filled damper 1a and the embodiment of FIGS. The point is that a U-shaped groove 15 is provided on the surface 7 side. Other configurations and operations are the same as those of the embodiment of FIGS.

FIGS. 4 and 5 are cross-sectional views of a viscous liquid-filled damper showing another embodiment of the present invention. The difference between this viscous liquid-filled damper and the embodiment of FIGS. FIG. 4 shows a viscous liquid-filled damper 1b in which the L-shaped groove 16 is provided on the periphery of the mating surface 7 of the lid 3. FIG. 5 shows a viscous liquid-filled damper 1c in which an L-shaped groove 16 is provided on the periphery of the mating surface 7 of the container body 2. Other configurations and operations are the same as those of the embodiment of FIGS.

FIGS. 6 and 7 are cross-sectional views of a viscous liquid-filled damper showing another embodiment of the present invention. The difference between this viscous liquid-filled damper and the embodiment of FIGS. 6 is that the joint end face of the container body and / or the lid is chamfered 17. FIG. 6 shows a viscous liquid in which the chamfered groove 16 is provided on the periphery of the mating surface 7 of the lid 3. FIG. 7 shows a viscous liquid-filled damper 1e provided on the periphery of the mating surface 7 of the container body 2. FIG. Other configurations and operations are shown in FIGS.
Since the embodiment is the same as that of the first embodiment, reference numerals are attached to the drawings, and the description is omitted.

Hereinafter, the effectiveness of the present invention will be demonstrated by examples. <Example 1> First, the cylindrical body and the upper flange of the container body were integrally formed of polypropylene,
The projecting portion and the flexible bottom material of the container body are integrally formed of a styrene-based thermoplastic elastomer, and the flexible bottom material is fixed to the lower surface of the cylindrical body to form a container body. On the other hand, the lid is formed of polypropylene so that the ring-shaped welding rib and the U-shaped groove are concentric on the disk. This container body is filled with a viscous fluid, and a lid is placed on the container body and ultrasonically welded to produce five viscous liquid-filled dampers 1 shown in FIGS. Then, with respect to the five viscous liquid-filled dampers, the occurrence of burrs from between the container body and the lid is visually observed.

<Examples 2 to 6> In the same manner as in Example 1, the viscous liquid-filled damper shown in FIGS.
It is made individually, and the state of burr generation is visually observed. That is, the second embodiment is different from the viscous liquid-filled damper 1a shown in FIG.
Is the same as The third embodiment is the same as the viscous liquid-filled damper 1b shown in FIG. Embodiment 4 is similar to the viscous liquid-filled damper 1c shown in FIG. Embodiment 5 is similar to the viscous liquid-filled damper 1d shown in FIG. The sixth embodiment is similar to the viscous liquid-filled damper 1e shown in FIG.

<Comparative Example> Next, as comparative examples, five viscous liquid-filled dampers shown in FIGS. 8 and 9 were made in the same manner as in Example 1, and the occurrence of burrs was visually observed.

As a result, in the viscous liquid-filled dampers of Examples 1 to 6, burrs leaking from the joint end surfaces were hardly generated, and even if there were, there was no problem in assembling. On the other hand, in the comparative example, burrs were generated and all of them had problems in assembling and the like, so that deburring work was indispensable. The embodiment of the present invention has been described above, but the specific configuration is not limited to this.

[0024]

As described in detail above, according to the present invention,
Since at least one of the mating surfaces of the container body and the lid is provided with a housing portion for storing the melt of the welding rib, the melt of the welding rib does not protrude to form burrs. Therefore, unlike the related art, there is no need to provide a fitting convex portion or a fitting concave portion, and there is no restriction on the configuration, the application range is widened accordingly, and the deburring work and the structural complexity are also eliminated. Becomes extremely easy. Further, according to the present invention, burrs can be prevented only by providing a simple groove or chamfer in the viscous liquid-enclosed damper, so that there is a feature that the manufacturing is further facilitated in addition to the above effects.

[Brief description of the drawings]

FIG. 1 is a sectional view of a viscous liquid-filled damper according to an embodiment of the present invention before assembly.

FIG. 2 is a cross-sectional view of the assembled viscous liquid damper according to the embodiment of the present invention after assembly.

FIG. 3 is a sectional view of a viscous liquid-filled damper according to another embodiment of the present invention before assembly.

FIG. 4 is a sectional view of a viscous liquid-filled damper according to another embodiment of the present invention before assembly.

FIG. 5 is a cross-sectional view before assembling a viscous liquid-filled damper showing another embodiment of the present invention.

FIG. 6 is a sectional view of a viscous liquid-filled damper according to another embodiment of the present invention before assembly.

FIG. 7 is a cross-sectional view before assembling a viscous liquid-filled damper showing another embodiment of the present invention.

FIG. 8 is a sectional view similar to FIG. 1 showing a conventional example.

FIG. 9 is a sectional view similar to FIG. 2 showing a conventional example.

FIG. 10 is a sectional view similar to FIG. 2 showing a conventional example.

[Explanation of symbols]

1, 1a, 1b, 1c, 1d, 1e, 25, 35 Viscous liquid-filled damper 2, 20, 30 Container main body 3, 23, 31 Lid 4, 22 Welding rib 5 Inside 6 Viscous liquid 7, 21 Fitting surface 8 Storage Part 10 Projecting part 11 Depression 12 Cylindrical body 13 Flexible bottom material 14 Flange 15 U-shaped groove 16 L-shaped groove 17 Chamfer 24 Burr 32 Fitting concave part 33 Fitting convex part 34 Minute interval

Claims (3)

[Claims] 1. A viscous liquid sealing damper in which a container main body and a lid are joined by melting a welding rib formed at the joint and a fluid is sealed therein. A viscous liquid-filled damper, characterized in that at least one of the mating surfaces is provided outside of the welding rib and a housing portion for storing a melt of the welding rib eluted during welding is provided. 2. The viscous liquid-filled damper according to claim 1, wherein said housing portion is formed in a groove shape. 3. The viscous liquid-filled damper according to claim 1, wherein the housing portion is formed by chamfering a joint end surface of the container body and / or the lid.