JPH0345255B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a shock absorbing support, i.e., a shock absorbing support, for connecting an object subject to vibration, such as an automobile engine, to a support structure, such as the body of an automobile. Regarding. In particular, the present invention relates to a type of dampening support that uses a fluid confined within a chamber to perform the damping action.

Prior Art and its Problems Conventional buffer supports that perform buffering using fluid confined within a chamber can be roughly divided into two types. The first type of conventional buffer support utilizes a low viscosity fluid confined within a chamber with rigid walls, and is of the type with rigid walls that slide air-tightly or liquid-tightly within the chamber. be. The sliding wall has small openings through which fluid flows out when the wall moves, dissipating the energy due to the pressurization of the fluid. In this type of buffer support, a chamber with rigid walls that confines fluid is fixed to a support structure (for example, the body of an automobile), and an object subject to vibration (for example, an automobile engine) is attached to the sliding wall using a rod. It is connected to. The rod slides through the rigid wall of the chamber in an air-tight or liquid-tight manner. For this reason, an air-tight or liquid-tight means is provided in the chamber wall portion through which the rod penetrates.

The second type of conventional shock absorbing support that uses fluid to perform a shock absorbing effect consists of a chamber containing a highly viscous fluid and an object ( It is of the type in which the chamber has rigid walls and is connected to a supporting structure (eg the car body).

The above two types of conventional buffer supports have various drawbacks. In particular, the first type of buffer support requires precise construction and very small tolerances. Furthermore, due to the small tolerances, the working surfaces (sliding surfaces) of the elements are subject to severe wear, which makes it easy for low-viscosity fluid to leak, resulting in a short service life. Furthermore, as the fluid continuously flows through the small openings in the sliding wall due to the movement of the sliding wall, the opening itself wears out and its diameter increases, resulting in a change in the good outflow performance of the fluid. Therefore, there is also the disadvantage that the behavioral characteristics of the buffer support are changed. On the other hand, in the second type of conventional buffer support, instead of the mooring part consisting of a rigid wall of the chamber and a rod penetrating the rigid wall, a rod and a chamber wall portion through which the rod penetrates can be formed. If a fixed mooring portion is provided between the mooring member and the flexible membrane, the service life will be longer than that of the first type. Furthermore, conventional buffer supports of the second type do not require such small tolerances as those of the first type. However, the second type of conventional damping supports has the disadvantage that they are adversely affected by high frequency vibrations associated with small amplitude oscillations. In other words, in such a vibration state, the fluid contained in the chamber has a high viscosity, so the buffer support acts as a completely rigid body,
It transmits high frequency vibrations without absorbing them.

OBJECTS OF THE INVENTION The aim of the present invention is to eliminate all the above-mentioned drawbacks of conventional damping supports by providing a damping support that is capable of absorbing even high-frequency vibrations. The buffer support of the present invention belongs to the above-mentioned second type.

It is an object of the present invention to provide a damping support for connecting a vibrating body to a support structure supporting this body, which has the following characteristics: That is, the features of this buffer support are that it includes a rigid box body 20, 37 with one end open, an annular element 22, 40 made of an elastomer material, and a radius of the annular element. The annular element 2 is provided with rigid rods 23 and 43 fixed to the inner circumferential surface of the annular element through the annular element.
2, 40 are tightly connected to one end of the box bodies 20, 37, and a closed space 62, 4 is defined between the box body and the annular element and is completely filled with a high viscosity liquid.
2, and one end of the rod 23, 43 is disposed within the closed space 62, 42 to support a small collar body 30, 45, furthermore, the small collar body 30, 45 is attached to one end of the rod. means for connecting at least two rods extending radially outwardly from one end of said rod and collectively having a surface area less than that of said small collar.
at least the radially innermost portion of the small collar body 30, 45 comprises at least two members 28, 29; 50, 52;
The small flange body located between 50 and 52 has a thickness smaller than the distance between the two members 28 and 29; 50 and 52, so that it has a predetermined size relative to the two members It is characterized by being movable.

EMBODIMENTS OF THE INVENTION According to a general embodiment of the invention, the buffer support consists of a box having flexible walls and filled with a highly viscous liquid, through which the A small plate carried on the end of a rigid rod is immersed in the liquid. The damping support further includes means for absorbing high frequency vibrations.

According to the most general embodiment of the invention, the means for absorbing high frequency vibrations comprises means for preventing the high frequency vibrations from increasing the viscosity of the high viscosity liquid. This means is provided by a change in the flexibility of the flexible wall of the box or by a small displacement of a small plate in the axial direction of a rigid rod passing through the flexible wall, or a combination thereof.

1 and 2 show a buffer support according to an embodiment of the present invention. As shown in FIGS. 1 and 2, this buffer support consists of a box 20 made of a rigid material such as metal and open on one side, with a flange 21 having a channel-shaped cross section at the edge of the opening. is provided. The opening of the box 20 is closed by a disk-like element 22 of elastomeric material. That is, an annular body 24 is fixed to the periphery of a disk-shaped element 22 of elastomeric material, and a flange 24' of this annular body and a portion of the elastomeric material are attached to a flange 2 of the box body 20.
By fitting into the box 20, the opening of the box 20 is closed. A rigid rod 23 passes through the central axis of the disc-shaped element 22 and is fixed to it. Spoke 2 with U-shaped cross section
6 is secured to the inner end 25 of the rigid rod 23 in the usual manner. The axes of these spokes 26 lie in a plane perpendicular to the axis of the rigid rod 23 and are symmetrical about the axis of the rod. Each spoke 26, which has a U-shaped cross-section as described above, has a base 27 connected to the end 25 of the rigid rod 23. The spoke arms 28, 29 are spaced apart and cantilever outwardly from the rigid rod 23.

Small plates 30 are associated with spokes 26.
In particular, the small plate 30 has a through hole in its center, is located coaxially with the axis of the rigid rod 23, and is housed within the U-shaped space of the spoke 26 (between the arms 28, 29). The thickness of the small plate 30 is less than the distance between the arms 28, 29 of the spokes 26. For this reason, there is clearance for a small movement of the plate 30 in the axial direction of the rigid rod 23.

A closed space 62 formed between the inner surface of the box body 20 and the disk-shaped element 22 is filled with a highly viscous fluid. A pin 32 is secured to the base 31 of the box 20, thereby securing the buffer support to a support structure such as an automobile body. A slot 34 is provided at the outer end 33 of the rigid rod 23 for connection between the damping support and a vibrating object (eg, an automobile engine).

The operation of the buffer support according to the embodiment of FIGS. 1 and 2 is as follows. When low amplitude, high frequency vibrations are transmitted from the vibrating body to the rigid rod 23, this rod moves back and forth, and this movement occurs between the box 20 and the disc-shaped element 22, which is filled with a highly viscous fluid. It is transmitted to the rod end 25, which is located in a closed chamber. When the rod end 25 reciprocates, the spokes 26 reciprocate. However, the thickness of the small plate 30 located between (the arms of) the spokes 26 is smaller than the distance between the spoke arms. However, since this plate 30 has a large surface, it moves relative to the spokes 26 but hardly moves relative to the fluid, creating a pressure increase in the fluid and making the buffer support itself rigid. It does not increase the viscosity of the fluid beyond a value that would cause it to transmit high frequency vibrations to the support structure.

Since only the rod ends 25 and spokes 26 move and the small plates 30 do not move, high frequency vibrations are absorbed by the damping support.

3 and 4 show a buffer support according to another embodiment of the present invention. As shown in FIGS. 3 and 4, the buffer support consists of a box 37 with an opening on one side, and a channel-shaped flange 38 is provided at the edge of this opening.
A ring body 41 of rigid material is also fixed to the circumferential surface of a flexible wall 40 in the form of a disc-like element of elastomeric material, and an outwardly facing flange 41' of this ring body and a portion 39 of elastomeric material are attached to the box body 37. flange 3
8 and sealingly connects the box and the disk-shaped element 40. The annular body 41 is fixed to the circumferential surface of the disk-like element 40 using a rubber-to-metal adhesive.

A closed space 42 is defined between the disc-shaped element 40 of elastomeric material and the inner surface of the box 37, which space is filled with a highly viscous liquid (generally
Fill completely with a liquid (with a viscosity not less than 50,000 centistokes), for example silicone grease.

A rigid rod 43 is provided at the center of the disk-like element 40.
will be established. The rod passes through the disk-like element 40 and is secured to the element 40 with a rubber-to-metal adhesive. A small plate 45 at the inner end 44 of the rigid rod 43 is located within a space 42 filled with a highly viscous liquid. The small plate 45 has a through hole 46 in its center.
, into which an element 47 described below is inserted to permit relative oscillatory movement of the small plate 45 along the axis of the rigid rod 43. The element 47 is a cylindrical bush 4 fixed to the end 44 of the rigid rod 43.
8, this bushing 48 has at its base a plurality of radially cantilevered extensions perpendicular to the axis of the rigid rod 43.
In particular, extension 50 is located at the upper base 49 of cylindrical bushing 48 and extension 52 is located at the lower base 51 of the bush. The extensions 50, 52 are offset from each other, such that the extensions 50, 52 in the axial direction
The distance between them is greater than the thickness of the plate 45,
This allows relative movement between the rod end 44 and the small plate 45 along the axis of the rod 43.
Finally, a pin 54 is permanently fixed to the base 53 of the box 37 for connecting the buffer support to a supporting structure (for example, an automobile body). In addition, rigid rod 43
An outwardly facing opening 56 is provided at the outer end 55 of the damping support for coupling the damping support to a vibrating object, such as an automobile engine.

The operation of the buffer support according to the embodiment shown in FIGS. 3 and 4 is substantially the same as that shown in FIGS. 1 and 2.

As can be seen from the above description of the various embodiments of FIGS. 1-4 that operate substantially the same with respect to the absorption of high frequency vibrations, the difference in construction is that within the viscous liquid capable of absorbing high frequency vibrations, The only difference is in the structure of the movable surface extension. Therefore, the most appropriate one may be selected from the various embodiments described above depending on the type of high-frequency vibrations to be generated. However, it goes without saying that the present invention is not limited to the illustrated embodiment. The configuration of the present invention described above has the following advantages.

The small collar body (small plates 30, 45) consists of at least two members (arm 2 of the spoke 26).
8, 29 or the extension part 50, 5 of the bush 48
2) Since it can move relative to the rod in the axial direction, even if the rod and the two members vibrate quickly and small in the axial direction due to the application of small amplitude, high frequency (high frequency vibration) vibrations,
While the small brim body performs axial movement relative to the rod and the small brim body, the small brim body itself does not vibrate against the high viscosity fluid, so this high frequency vibration is almost entirely lost to the fluid. It is not transmitted to the In other words, since the entire support body does not become rigid, there is an advantage that the above-mentioned high-frequency vibrations are efficiently absorbed here and are not transmitted to the body of the automobile or the like.

Note that vibrations of low frequency (low frequency vibration) can of course be absorbed.

Since extremely strict tolerances are not required for the component parts, construction and manufacturing are simple, and reliability over time can be improved.Also, since the construction of the at least two members and the small collar body is extremely simple, The overall configuration is inexpensive.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a buffer support according to a first embodiment of the present invention, and is a plan view taken along the - line in FIG. 2, and FIG. 2 is a sectional view taken along the - line in FIG. 1.
FIG. 3 is a diagram showing a buffer support according to the first embodiment of the present invention, and is a plan view taken along the - line in FIG. 4, and FIG. 4 is a sectional view taken along the - line in FIG. 3. . 20, 37: box body, 22, 40: disk-shaped element, 23, 43: rigid rod, 30, 45: small plate, 62, 42: closed space.

Claims (1)

[Claims] 1. In a buffer support for connecting a vibrating object to a support structure, the buffer support includes a rigid box body 20, 37 with one end open.
and an annular element 22, 40 made of an elastomer material.
and rigid rods 23, 43 fixed to the radially inner circumferential surface of the annular element through the annular element, the annular elements 22, 40 being fixed to the box bodies 20, 37.
One end of the rod 23, 43 is tightly connected to form a closed space 62, 42 between the box body and the annular element and completely filled with a high viscosity liquid, and one end of the rod 23, 43 is connected to the closed space 62, 42. means disposed within the spaces 62, 42 to support the small collar bodies 30, 45, and further comprising means for connecting the small collar bodies 30, 45 to one end of said rod; at least two members 28, 29; 50, 52 extending radially outwardly and collectively having a surface area smaller than the surface area of said small collar body, at least the radially innermost portion of said small collar body 30, 45; is said at least two members 2
8, 29; 50, 52, and the small collar body has a thickness equal to that of the two members 28, 29;
A buffer support member characterized in that it is movable by a predetermined distance relative to the two members by being smaller than the distance between the two members.