JPS6117736A - Omni-directional vibro-controlled damper - Google Patents

Abstract

PURPOSE:To provide controllability for vibration of a car body or an engine, which is often as complex as three-dimensional, by coupling a plurality of vibrosuppression dampers solidly in such a way as intersecting each other perpendicularly. CONSTITUTION:A piston 22 with large mass is accommodated in a cylinder 21 filled with a fluid, an oil 7, and is provided with an orifice 23 so that the working oil 7 on both sides of piston can flow in alternately. Thus vibro-suppression dampers A, B are constituted, and they are installed in a plural number and fixed in such a way as intersecting each other. This can suppress vibrations in the X, Y and Z directions effectively.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to an omnidirectional vibration damper device for damping vibrations of any body or engine of an automobile.

[Background of the Invention] □ An example of a conventional vibration damper device will be explained based on FIGS. 4 and 5.

In the normal slow operating speed range, there is no relative movement between the outer cylinder 21 and the piston 22, so the damper does not operate at all, but the body or engine (not shown) equipped with the damper is activated by external input etc. When the piston 2 starts vibrating,
Since the inertia of the cylinder 2 is large, a relative movement is generated between the cylinder 21 and the hydraulic oil 7 filling the cylinder 21 and moving through the orifice 23, thereby generating a resistance force and damping the vibration. The structural difference between Fig. 4 and Fig. 5 is that the piston 2
2 in the neutral position; in the case of Fig. 4, the spring 24 is used, and in the case of Fig. 5, the magnets 31a, 31 are used.
This shows the method of maintaining neutrality using repulsive force in b.

By the way, in the examples shown in Figures 4 and 5, if the direction of vibration is limited, such as in a steering system, the vibration distribution will work if the system is installed as is, but if the direction of vibration is not constant, such as in the body or engine, had the disadvantage that it could only damp vibrations in a specific direction.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide an omnidirectional vibration damper that can suppress complex vibrations such as those of the body or engine of an automobile.

[Summary of the invention]

The omnidirectional vibration damper of the present invention has a piston with a large inertia with a damping orifice bored in the center so as to be slidable inside a cylinder, and the cylinder is filled with hydraulic oil. When assembling multiple pieces at right angles, they are fixed.

By attaching the omnidirectional vibration damper with the above structure to the body or engine of an automobile, it is possible to prevent vibrations in all directions, even if the body or engine does not vibrate in one direction but in multiple directions. The respective resistance forces of the vibration dampers or the combined resistance forces act effectively (1), and the vibrations of the body or engine can be reliably damped.

[Embodiments of the invention]

An embodiment of the present invention will be described with reference to FIGS. 1 to 3.

Note that the same parts as in Figure 1g1 are given the same numbers and the explanation is omitted.

(First Embodiment) The first embodiment shown in FIGS. 1 and 2 has the structure shown in FIG. This is a single damper with a single character shape.

A piston 2 is placed in a cylinder 21 filled with oil 7 as a fluid.
The piston 22 is provided with an orifice 23 which accommodates the piston 2 and allows the hydraulic oil 7 on both sides of the piston to flow alternately. The cylinder 21 is fixed to the body or engine of an automobile (not shown) via a U bolt or the like. The piston 22 used has a large mass.

Coil springs 24 having a small spring constant are provided at both ends inside the cylinder 21 .

The cylinder 21 also has a hole 25 for oil injection and air release.
A bolt-shaped comb 26 is fitted into the hole 25, and a seat surface 27 at the tip of the stopper 26 prevents oil leakage.

Each of the vibration dampers A and B formed in this way
Connect in a t-T shape. Horizontal vibration damper A
A passage 30 is provided in the piston 22 of the cylinder 2.
1 is provided with a passage 29 to communicate the insides of both cylinders.

Note that the spring 28 provided in the vibration damper B is a gravity balance spring that holds the piston 22 in a neutral position against its gravity.

A vibration damper in the shape of a single character is attached to the body of an automobile or the like at an angle of inclination θ, as shown in Fig. 2.

The operation of this embodiment will be explained below.

When the body of an automobile or the like begins to vibrate slightly due to impact from the road surface or vibration from the engine, the cylinder 21 fixed to the body also vibrates slightly. However, since the piston 22 has a large mass, the piston 22 cannot follow the slight vibrations of the cylinder 21, and the two move relative to each other and slide. As a result, oil alternately flows through the orifice 23 in the center of the piston 22. The oil flow resistance at this time acts to damp the slight vibrations of the cylinder 21. Coil springs 24 at both ends prevent piston 22 from moving too far to the ends of cylinder 21. In addition, when the vibration input to the vibration dampers A and B is large on either side, the damped vibration is converted into heat of the hydraulic oil 7, and the hydraulic oil 7 whose temperature has increased passes through the passage 29.30 and inputs the vibration. It flows into the cylinders where there is little oil and prevents the oil temperature from rising.

The vibration damper A dampens the vibration of the body in the χ direction, and the vibration damper B dampens the vibration in the Y direction. In the combined direction of X and Y, A and B act simultaneously according to their component forces, damping vibrations, and also mounting at an angle of inclination θ in two directions perpendicular to the plane of the paper. Therefore, the vibration damper B damps the vibration.

(Second Embodiment) In the first embodiment, three-dimensional vibrations are dealt with by installing a T-shaped vibration damper with an inclination angle θ, but the second embodiment shown in FIG. In the example, there is another one in the direction perpendicular to the plane of the paper, perpendicular to the horizontal vibration damper A.
One vibration damper C is provided, and one vibration damper A, B, and C are provided in each of the X, Y, and Z directions of the coordinate axes.

According to this, even if the vibration damper is not installed at an angle,
In addition to being able to deal with three-dimensional vibrations in the , y, and z directions, the anti-shite piston 22 can be pressed against the cylinder 21 during vertical movement (Y direction) or front-back direction (two directions) as in the first embodiment. Therefore, the drawback of increased 7 riction during operation can be prevented.

In the first embodiment, an example is shown in which the dampers A and B are arranged in a T-shape, but if the dampers A and B are at right angles to each other and are pressed down, the coupling form will be T, L, Any form of cross shape is acceptable. Similarly, in the second embodiment,
It is only necessary that the dampers A, B, and C are arranged at right angles to each other.

Further, in both the first and second embodiments, the piston neutral holding method is not limited to the spring 24, but may also be a method using a magnet as shown in FIG.

〔Effect of the invention〕

As mentioned above, according to the present invention, a plurality of vibration dampers are integrally coupled orthogonally to each other, so vibrations whose vibration direction is not limited, that is, three-dimensional complex vibrations, are produced. can also effectively suppress the vibration. Therefore, the omnidirectional vibration damper of the present invention can fully demonstrate its effectiveness by being mounted on something that generates complex vibrations, such as an automobile body or engine.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of an omnidirectional vibration damper according to an embodiment of the present invention, Fig. 2 is a side view of the omnidirectional vibration damper of Fig. 1 installed, and Fig. 3 is a second embodiment. FIG. 4 is a sectional view of a conventional vibration damper, and FIG.
This figure is a sectional view showing a modification of FIG. 4. 21...Cylinder, 22...Piston, 2
3... Orifice, 24... Coil spring,
25... Hole for oil injection and air release, 26... Plug,
28...Gravity balance spring, 29.3
0...Passage, 7...Hydraulic oil charger Tatsu Unuma Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] It is characterized by a plurality of vibration dampers, each consisting of a piston with a large inertia with a damping orifice bored in the center and slidably provided in a cylinder filled with hydraulic oil, assembled and fixed at right angles to each other. Omnidirectional vibration damper.