JP2003194139A - Controllable mount - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To ensure a necessary and sufficient supporting force of a mount body 15 of rubber elastic material, and produce appreciable vibration isolation performance. <P>SOLUTION: Between a first mounting member 11 and a second mounting member 13 at opposite ends, a controllable mount comprises an electromagnetic actuator 14 having an electromagnet 141 fixed to the first mounting member 11 and a diaphragm 142 of a permanent magnet elastically connected to the electromagnet 141 via a rubber spring 143, and the mount body 15 of rubber elastic material connected between opposed surfaces of the second mounting member 13 and diaphragm 142. The diaphragm 142 of the electromagnetic actuator 14 is displaced under vibration in opposite phase to an input vibration to absorb a transmitted vibration actively. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mount used as an anti-vibration support means for a vibrating body such as an automobile engine, and more particularly to a control mount that actively absorbs a vibration input by driving an electromagnetic actuator.

[0002]

2. Description of the Related Art A passive rubber mount as shown in FIG. 4 is one type of mount that elastically supports an engine on a vehicle body frame. That is, the mount 100 of this type has the bolt 1 on the engine side, which is the supported vibrating body.
First mounting plate 101 mounted by 02
The mount main body 105 made of a rubber-like elastic material is integrally vulcanized between the second mounting plate 103, which is opposed to the first mounting member 101 and is mounted by the bolt 104 on the vehicle body frame side which is the support. It has a bonded structure.

However, the passive rubber mount 100, whose vibration damping property depends only on the elasticity of the mount body 105 made of a rubber-like elastic material, has a high spring constant of the mount body 105 to support the load of the engine. I have no choice but to say. Therefore, it is difficult to secure the flexible deformability with respect to the input vibration, and it is difficult to sufficiently enhance the vibration damping property. If the spring constant is lowered to improve the vibration damping property,
There was a problem that the bearing capacity for the engine load was insufficient.

Further, in order to solve such a problem, a vibration having a phase opposite to the input vibration is applied to a mount body supporting a load by a vibrating actuator so that the vibration transmitted to the vehicle body frame side through the mount body. A mounting device has been developed which is designed to cancel each other (Japanese Patent Laid-Open No. Sho 63-63).
195443).

However, according to this mounting device, since the vibration actuator is built in the mount body, the structure for vibrating the mount body is complicated and the structure of the electromagnetic vibration actuator is also complicated. So I had to make it expensive.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and its technical problem is to provide a necessary and sufficient supporting force for a mount body made of a rubber-like elastic material. It is to provide a control type mount that can secure excellent performance and can obtain excellent vibration damping performance.

[0007]

As a means for effectively solving the above-mentioned technical problems, the control mount according to the invention of claim 1 is attached to one of a supported vibrating body and a supporting body. Between one mounting member and the second mounting member mounted on the other of the supported vibrating body and the support,
Between an electromagnet fixed to the first mounting member and an electromagnetic actuator elastically connected to the electromagnet in a state capable of vibrating and displacing due to the magnetic force of the electromagnet, and between the facing surfaces of the second mounting member and the diaphragm. And a mount body made of a rubber-like elastic material connected to the. That is, the structure is such that the electromagnetic actuator is connected in series to the vibration input direction to the mount body of the passive rubber mount.

The controllable mount according to the invention of claim 2 is
In the structure according to claim 1, the diaphragm is made of a permanent magnet.

[0009]

1 is a vertical sectional view schematically showing a preferred embodiment of a controllable mount according to the present invention, and FIG. 2 is a vertical sectional view showing another preferred embodiment. Figure 1
In the embodiment shown in FIG. 1, the control type mount of the present invention generally indicated by reference numeral 1 is a first mounting bolt as a first mounting member mounted on a bracket or the like (not shown) of an automobile engine which is a supported vibrating body. 11, a second mounting bolt 12 and a second mounting plate 13 as a second mounting member that is mounted on the vehicle body frame side (not shown) of the support, an electromagnetic actuator 14, and a rubber-like elastic material. And a mount body 15.

More specifically, the electromagnetic actuator 14 is wound in a disk-shaped yoke 141a made of a ferromagnetic material having an upper surface integrally joined to the base 11a of the first mounting bolt 11 and an annular recess on the lower surface thereof. An electromagnet 141 composed of an exciting coil 141b, a diaphragm 142 composed of a disk-shaped permanent magnet arranged on the lower surface side of the yoke 141a, and a rubber integrally interposed and bonded between the lower surface of the yoke 141a and the diaphragm 142. And a rubber spring 143 made of elastic material.

The exciting coil 141b in the electromagnetic actuator 14 generates an alternating magnetic field by being supplied with an alternating exciting current I, and a magnetic circuit passing through the inner circumference of the exciting coil 141b and the yoke 141a is formed. The magnetic field derived from the lower surface of the yoke 141a extends to the periphery of the diaphragm 142. Therefore, by supplying the exciting current I, the exciting coil 141b and the yoke 141a
When the polarity of the electromagnet 141 composed of is periodically changed, the diaphragm 142 made of a permanent magnet movably provided on the electromagnet 141 via the rubber spring 143 resists the elasticity of the rubber spring 143. It is designed to be vertically displaced.

The mount main body 15 is vulcanized and molded into a cylindrical shape by a rubber-like elastic material, and is a main body that elastically supports the load of the engine, so that it is in the vibration input direction (vertical direction) and its right angle. Sufficient supporting force is given by having the required thickness in the direction (radial direction) and the required hardness.

The rubber spring 143 in the electromagnetic actuator 14 includes the yoke 141a of the electromagnet 141 and the vibrating plate 14.
2 is integrated by vulcanization adhesion or the like, and the mount body 15 is also integrated between the diaphragm 142 and the second mounting plate 13 by vulcanization adhesion or the like. However,
More practically, as in the other embodiment shown in FIG. 2, a rubber spring 143 is integrally molded between a pair of metal plates 144 and 145 made of a ferromagnetic material, and the metal plate 146 and the second plate are combined. After the mount main body 15 is integrally molded between the mounting plates 13, the metal plate 144 is integrated with the lower surface of the yoke 141a by an appropriate coupling means such as caulking.
5, 146 are integrated with the vibration plate 142 made of a permanent magnet by an appropriate coupling means such as caulking.

The rubber spring 143 and the mount body 1
5 may be directly integrated with the diaphragm 142 by vulcanization adhesion or the like, but in this case, the diaphragm 142 made of a ferromagnetic material.
After vulcanizing and adhering the rubber spring 143 and the mount body 15 to each other, the diaphragm 142 is preferably magnetized to form a permanent magnet. Further, the electromagnetic actuator 14 has a rubber spring 1
Instead of 43, a metal coil spring or a leaf spring may be used to elastically connect the electromagnet 141 and the diaphragm 142.

The sensor 2 is composed of, for example, an acceleration sensor or a load sensor, and detects vibrations generated by driving the engine. The controller 3 obtains the frequency and amplitude of the input vibration from the engine by taking in the vibration detection data d from the sensor 2, and the vibration plate 142 of the electromagnetic actuator 14 is in the opposite phase to the vibration waveform.
The control current i required for oscillating and displacing is output. The amplifier 3 supplies the exciting current I amplified in proportion to the control current i to the exciting coil 14 of the electromagnetic actuator 14.
1b.

Here, when the vibrating plate 142 is made of a ferromagnetic metal plate, its displacement corresponds only to the change in the magnetic force of the electromagnet 141, and therefore its frequency is the frequency of the exciting current I. Doubled. Therefore, in this case, in order to displace the diaphragm 142 at the same frequency as the input vibration, it is necessary to divide the frequency of the exciting current I into ½ or to apply a bias, but in the present embodiment,
Since a permanent magnet is used for the diaphragm 142, the exciting current I
Due to the repulsive force between the same poles and the attraction force between the different poles due to the change in the polarity of the electromagnet 141 due to, the vibration is displaced at the same frequency as the input vibration.

With the above structure, the control mount 1 according to the present invention has the first mounting bolt 11 as described above.
At the same time, the engine is elastically supported on the vehicle body frame by being fastened to a bracket or the like of the vehicle engine which is a supported vibrating body and is fastened to the vehicle body frame side of the vehicle which is the support body by the second mounting bolts 12. To do.

Here, when the engine vibration generated in the engine is input via the first mounting bolt 11, the vibration displacement is transmitted to the mount body 15 via the electromagnetic actuator 14, whereby the mount body 15 is moved. Subject to repeated expansion and contraction. When the spring constant of the mount body 15 is k and the magnitude of the vibration displacement input from the diaphragm 142 of the electromagnetic actuator 14 to the mount body 15 is X, the second attachment from the mount body 15 to the body frame side due to the input vibration. The load (vibration) transmitted to the plate 13 is the load k generated by the deformation of the mount body 15.
It corresponds to X.

On the other hand, the electromagnetic actuator 14 is driven by the alternating exciting current I controlled by the controller 3 based on the detection data d from the sensor 2 for detecting the vibration input from the engine to the control mount 1.
The vibrating plate 142 is relatively vibratingly displaced relative to the electromagnet 141 in a phase opposite to the vibration waveform of the input vibration.

In other words, in the half cycle in which the electromagnet 141 of the electromagnetic actuator 14 is displaced downward so as to compress the mount body 15, the diaphragm 142 causes the electromagnet 141 to move.
Is moved to the upper side and relatively moved upward, and the mount body 15
The relative displacement X of the diaphragm 142 with respect to is canceled out. In addition, the electromagnet 141 is arranged to extend the mount body 15.
In the next half cycle in which the diaphragm 142 is displaced upward, the diaphragm 142 is relatively moved downward by the repulsion with the electromagnet 141, and the relative displacement X of the diaphragm 142 with respect to the mount body 15 is offset. Therefore, the amount of expansion and contraction of the mount body 15 is significantly reduced, and as a result, the transmission load kX generated by the deformation of the mount body 15, that is, the vibration transmitted to the second mounting plate 13 is significantly reduced.

FIG. 3 shows the dynamic spring constant of the controlled mount 1 of the present invention in comparison with the passive mount 100 having the structure shown in FIG. 4 described above as the prior art. That is, according to the controllable mount 1 of the present invention, the dynamic spring constant is significantly reduced in all vibration frequency regions, and the vibration insulation is improved.

Further, as is apparent from the cross section shown in the figure, according to the control type mount 1, the mount body 15 similar to the conventional passive type rubber mount and the first mounting bolt 11 which is the first mounting member at one end thereof are provided. Since the electromagnetic actuator 14 is provided between them, it has a simple structure and can therefore be provided at low cost. Moreover, according to the control-type mount 1, since the reduction of the vibration transmission does not depend on the elasticity of the mount body 15 itself, the rubber-like elastic material forming the mount body 15 is used to support the engine load sufficiently. And the durability can be improved.

[0023]

According to the control mount of the first aspect of the invention, the electromagnet fixed to the first mounting member and the elastic connection to the electromagnet are provided between the first mounting member and the second mounting member at both ends. Since it is provided with an electromagnetic actuator made of a vibrating plate and a mount body made of a rubber-like elastic material connected between the facing surfaces of the second mounting member and the vibrating plate,
By vibrating and displacing the diaphragm of the electromagnetic actuator in the opposite phase of the input vibration, the transmitted vibration is actively absorbed,
Vibration transmission can be significantly reduced. Moreover, since the passive mount has a simple structure in which the electromagnetic actuators are arranged in series, it can be provided at a low cost.

According to the control type mount of the second aspect of the present invention, since the diaphragm is made of a permanent magnet, the diaphragm is oscillated and displaced at the same frequency as the input vibration by the exciting current having the same frequency as the input vibration, and then transmitted. Vibration can be canceled out.

[Brief description of drawings]

FIG. 1 is a schematic configuration explanatory view showing an embodiment of a controllable mount according to the present invention.

FIG. 2 is a longitudinal sectional view showing another embodiment of the controllable mount according to the present invention.

FIG. 3 is a characteristic diagram showing a comparison of dynamic spring constants of a control mount according to the present invention and a conventional passive rubber mount.

FIG. 4 is a vertical sectional view showing an example of a passive rubber mount according to a conventional technique.

[Explanation of symbols]

1 Control mount 11 First mounting bolt (first mounting member) 12 Second mounting bolt (second mounting member) 13 Second mounting plate (second mounting member) 14 Electromagnetic actuator 141 electromagnet 142 diaphragm 143 rubber spring 144-146 metal plate 15 Mount body

Claims (2)

[Claims] 1. A first mounting member (11) mounted on one of a supported vibrating body and a support, and a second mounting member (1) mounted on the other of the supported vibrating body and a support.
2) and an electromagnet (141) fixed to the first mounting member (11) and a diaphragm (142) elastically coupled to the electromagnet (141) in a state capable of vibrating displacement by its magnetic force. An electromagnetic actuator (14)
A controllable mount comprising: a mount body (15) made of a rubber-like elastic material, which is connected between opposing surfaces of the second mounting member (12) and the diaphragm (142). 2. The controllable mount of claim 1, wherein the diaphragm (142) comprises a permanent magnet.