JPH08210428A - Vibration isolating device - Google Patents

Abstract

PURPOSE: To provide a vibration isolating device which can contribute to lightening weight of the device and facilitating its manufacture, in the device wherein a member unsuitable for plastic working can be used. CONSTITUTION: An edge part 51 of an elastic film 5 is interposed between a flange part 11 protrusively formed in an opening end part of an outer cylinder 1 and an edge part 71 of a cover member 7, to fixedly calk the flange part 11 and the edge part 71 of the cover member 7 by a separate unit cylindrical calking member 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration damping device suitable for use in engine mounts and the like.

[0002]

2. Description of the Related Art As a conventional vibration isolator, for example, one shown in FIG. 3 is known. In this structure, an elastic body 103 such as rubber is provided between a center member 101 attached to a bracket on the engine side and an outer cylinder 102 attached to the vehicle body side, and throttle passage means is provided on the bottom side where the outer cylinder 102 is opened. 105 and the diaphragm 106 are attached by a lid member 107 made of a metal plate. In this attachment, a flange portion 108 is formed in the bottom side opening of the outer cylinder 102, and an edge portion of the throttle passage means 105 and an edge portion of the diaphragm 106 are sequentially stacked on the lower surface of the flange portion 108, and the flange portion is provided here. The edge portion of the lid member 107 having a diameter larger than 108 is further overlapped. Then, as shown in the figure, the edge portion of the lid member 107 is bent along the outer periphery of the flange portion 108 and fixed by crimping.
A liquid chamber 109 is formed by filling a liquid inside the outer cylinder 102 and between the elastic body 103 and the diaphragm 106.

Although not shown, there is also a case where the outer cylinder 102 side is bent and fixed by crimping, which is the reverse of the above. That is, the outermost diameter of the flange portion 108 of the metal plate outer cylinder 102 is formed larger than the outer diameter of the edge portion of the lid member 107, and the edge portion of the throttle passage means 105 and the diaphragm 106 are formed on the lower surface of the flange portion 108. Edge portion of the lid member 10
The edge portions of 7 are sequentially stacked, and the edge portion of the flange portion 108 is bent along the outer periphery of the edge portion of the lid member 107 and fixed by caulking.

[0004]

In such a conventional vibration isolator, since the outer cylinder 102 or the lid member 107 itself is bent and caulked and fixed, the outer cylinder 102 or the lid member 107 is made of a metal plate or the like. It must be made of a plastically workable material. Therefore, it is not possible to use a material such as a resin or a casting which is unsuitable for plastic working, which causes a problem such as complicating the manufacturing which prevents the weight reduction of the apparatus.

In view of the above facts, an object of the present invention is to provide a vibration isolation device which can use a member unsuitable for plastic working and which can contribute to weight saving of the device and facilitation of manufacturing. To do.

[0006]

According to the present invention, an outer cylinder connected to one of a vibration generating portion and a vibration receiving portion, a center member connected to the other of the vibration generating portion and the vibration receiving portion, and the outer cylinder. And an elastic body interposed between the center member and the center member, a liquid chamber formed in a recess opening at one end of the outer cylinder, and a partition wall of the liquid chamber provided in the opening of the outer cylinder. An elastic film forming a part, and a lid member that covers the opening of the outer cylinder from the outside in the axial direction of the elastic film, and a flange protruding outward in the radial direction at one end of the outer cylinder. A portion is provided, the edge portion of the elastic film is interposed between the flange portion and the edge portion of the lid member, and a cylindrical caulking is provided radially outward of the flange portion and the edge portion of the lid member. A member is disposed, and both ends of the caulking member are bent to form the flange portion and the front portion. Is a rim portion of the lid member that is fixed by sandwiching by the caulking member.

[0007]

According to the above construction of the present invention, when the flange portion of the outer cylinder to be joined and the edge portion of the lid member are stacked, a plastically workable cylindrical caulking member separate from them is provided at both ends. Then, they are bent along the outer peripheries of the flange portion and the edge portion and fixed by crimping. Therefore, the flange portion and the edge portion are not plastically worked at the time of mounting, and thus, a material which is unsuitable for plastic working can be applied.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings.

In the first embodiment shown in FIG. 1, an elastic body 3 made of rubber is disposed between an outer cylinder 1 and a center member 2, and the elastic body 3 is located above the inner circumference of the outer cylinder 1 and in the center. They are fixed to the outer circumference of the member 2, respectively. The elastic body 3 is extended in a film shape to the lower end of the inner circumference of the outer cylinder 1. Therefore, the elastic body 3 has a recess 31 formed on the lower side in the drawing.

The outer cylinder 1 is opened downward in the figure by a recess 31, and a flange portion 11 projecting radially outward is integrally provided at the lower end of the outer cylinder 1. Further, a mounting piece 12 is integrally formed on the upper end of the outer cylinder 1 so as to project outward in the radial direction, and the mounting piece 12 mounts the device on the vehicle body side. The outer cylinder 1 is formed by resin molding. Further, the center member 2 is attached to a bracket on the engine side, for example, with a screw hole 21.

The throttle passage means 4 is fitted inside the opening of the recess 31 so as to abut the inner wall of the elastic body 3. An edge portion 41 having a diameter larger than the inner diameter of the outer cylinder 1 is formed on the lower side of the throttle passage means 4 so as to project radially outward, and the edge portion 41 projects from the opening and the lower surface 11 a of the flange portion 11. Abutted against.

Further, the peripheral edge portion 51 of the elastic film 5 made of circular rubber is brought into contact with the lower surface 41a of the edge portion 41. Therefore, the lower surface 11a of the flange portion 11 is covered with the elastic film 5 via the edge portion 41. The peripheral edge portion 51 is abutted. As a result, the opening is closed by the elastic film 5, and the liquid is enclosed in the sealed space formed by the recess 31 and the elastic film 5 to form the liquid chamber 6.

The liquid chamber 7 is divided into two by the throttle passage means 4 into a pressure receiving liquid chamber 61 on the upper side and a sub liquid chamber 62 on the lower side in the drawing,
Further, the throttle passage 42 formed on the outer periphery of the throttle passage means 4
Thus, the pressure receiving liquid chamber 61 and the sub liquid chamber 62 communicate with each other.

A cup-shaped lid member 7 is disposed below the elastic film 5 in the figure. An edge 71 is formed on the peripheral edge of the lid member 7 toward the outside in the radial direction, and the edge 71 abuts the peripheral edge 51 of the elastic film 5 from below to cover the opening. An air chamber 8 is formed between the elastic film 5 and the lid member 7, and an air vent hole is formed in the lid member 7 as needed.

The flange portion 11 and the edge portion 71 are formed to have substantially the same outer diameter, and the edge portion 41 and the peripheral edge portion 51 are formed so as to have an outer diameter smaller than these.

Further, the edge portion 71 is provided with a standing portion 72 which is bent upward so as to have a predetermined height. The upright portion 72 is located outside the elastic film 5 and its tip directly contacts the lower surface 11a of the flange portion 11, so that the lower surface 1 of the flange portion 11 is exposed.
The distance between 1a and the upper surface 71a of the edge portion 71 is defined as a predetermined distance. Therefore, by adjusting the height of the standing portion 72, the elastic film 5 located between the flange portion 11 and the edge portion 71 is adjusted.
It is possible to adjust the peripheral edge portion 51 so that it is sandwiched by the optimal clamping force. When the peripheral edge portion 51 is directly sandwiched between the flange portion 11 and the edge portion 71, or when the peripheral edge portion 51 is formed between the flange portion 11 and the edge portion 71 via the edge portion 41 of the throttle passage means 4.
In any case of sandwiching, the sandwiching force of the peripheral edge portion 51 can be adjusted by adjusting the height of the standing portion 72.

The standing portion may be provided not on the edge portion 71 of the lid member 7 but on the flange portion 11 side of the outer cylinder 1.

A cylindrical metallic caulking member 9 is disposed radially outward of the flange portion 11 and the edge portion 71. The outer diameters of the flange portion 11 and the edge portion 71 and the inner diameter of the caulking member 9 are configured to be substantially the same diameter, and the axial center portion of the inner peripheral surface of the caulking member 9 is the outermost end of the flange portion 11 and the edge portion 71. Abutting. Both ends of the caulking member 9 sandwiching the central portion thereof are bent toward the flange portion 11 and the edge portion 71, respectively, and are pressed against the upper surface 11b of the flange portion 11 and the lower surface 71b of the edge portion 71. As a result, the flange portion 11 and the edge portion 71 are sandwiched and fixed by the caulking member 9.

In such a vibration isolator, when the vibration of the engine is input, the vibration is transmitted to the elastic body 3 via the center member 2, whereby the elastic body 3 is elastically deformed and the pressure receiving liquid chamber 61. Scales. When the pressure receiving liquid chamber 61 expands or contracts,
The liquid inside moves back and forth between the pressure receiving liquid chamber 61 and the sub-liquid chamber 62 via the throttle passage 42, and the liquid resonates in the throttle passage 42, thereby generating a large damping force. This absorbs engine vibration.

FIG. 2 is a view for explaining the manufacturing process of the caulking member of the present invention, and is a cross-sectional view showing the main part of the vibration isolator shown in FIG.

In FIG. 2 (a), the caulking member 9 made of a plastically workable cylindrical metal plate has an axially central portion on the inner peripheral surface thereof which is in contact with the radial tip of the flange portion 11 of the outer cylinder 1. It is press-fitted so that it comes into contact with the caulking member 9
The end portion side above the central portion in the figure is bent toward the flange portion 11 side, whereby the caulking member 9 is attached to the outer cylinder 1 in advance. The caulking member 9 may be fixed to the outer cylinder 1 by a method such as adhesion or welding.

From this state, the lower surface 11a of the flange portion 11 is
Then, the edge portion 41 of the throttle passage means 4, the edge portion 51 of the elastic film 5, and the edge portion 71 of the lid member 7 are sequentially stacked. At this time, the central portion in the axial direction on the inner peripheral surface of the caulking member 9 is configured to abut the radial tip of the edge portion 71 of the lid member 7.

Next, as shown in FIG. 2 (b), the caulking member is bent by bending the end portion of the caulking member 9 lower than the central portion in the drawing from the state of FIG. 2 (a) into an edge portion 71. The manufacturing according to No. 9 is completed. Both ends of the caulking member 9 are flange portions 1
It comes into pressure contact with the upper surface 11b of 1 and the lower surface 71b of the edge portion 71, and the flange portion 11 and the edge portion 71 are sandwiched and fixed by the caulking member 9.

Incidentally, FIG. 2 (c) is a modified example of this manufacturing. Unlike the one shown in FIG. 2 (a), the edge side of the caulking member 9 lower than the central portion in the figure is closer to the edge 71 side of the lid member 7. The caulking member 9 is attached to the lid member 7 in advance by being bent. Similarly, the flange portion 11, the edge portion 41 of the throttle passage means 4, the edge portion 51 of the elastic film 5, and the edge portion 71 of the lid member 7 are sequentially stacked, and in this state, the central portion of the caulking member 9 is located above the central portion of the drawing. By bending the end portion side to the flange portion 11, the flange portion 11 and the edge portion 71 are caulked and fixed.

In the above example, the outer cylinder 1 is made of resin, but it may be made of cast metal such as iron or aluminum, or other brittle materials, which reduces the weight of the device and the like. A wider variety of materials can be selected as appropriate in consideration of rust prevention, etc., and the degree of freedom in design can be increased. This also applies to the lid member 7 as in the outer cylinder 1.

[0027]

As described above, according to the present invention, due to the structure described in the claims, it is possible to use a member unsuitable for plastic working, which contributes to weight reduction of the vibration isolator and simplification of manufacture. .

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view showing a main part of an embodiment of the present invention.

FIG. 3 is a vertical sectional view showing a conventional technique.

[Explanation of symbols]

 1 Outer Cylinder 11 Flange Part 2 Center Member 3 Elastic Body 4 Throttle Passage Means 5 Elastic Membrane 6a Pressure Receiving Liquid Chamber (Liquid Chamber) 6b Sub-Liquid Chamber (Liquid Chamber) 7 Lid Member 71 Edge 8 Air Chamber 9 Caulking Member

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display area F16F 13/20 F16F 13/00 T

Claims (1)

[Claims] 1. An outer cylinder connected to one of the vibration generator and the vibration receiver, a center member connected to the other of the vibration generator and the vibration receiver, and between the outer cylinder and the center member. An elastic body interposed, a liquid chamber formed in a recess opening at one end of the outer cylinder, and an elastic film provided in the opening of the outer cylinder and forming a part of a partition of the liquid chamber. A vibration-damping device comprising: a lid member that covers the opening of the outer cylinder from the outside in the axial direction of the elastic film, wherein a flange portion that projects radially outward is provided at one end of the outer cylinder. An edge portion of the elastic film is provided between the flange portion and the edge portion of the lid member, and a cylindrical caulking member is provided radially outward of the flange portion and the edge portion of the lid member. The flange portion and the lid member by arranging and bending both ends of the caulking member. An anti-vibration device, characterized in that the edge portion is fixed by being sandwiched by the caulking member.