JPH11351313A - Excitation controlling type vibration control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a excitation controlling type vibration control device which can securely connect a vibrating member and a movable body without causing looseness with use as in the case of screwing. SOLUTION: On a tip end of a connecting member 42 of a vibrating member 4, are recess 42a, and first penetration holes 42b, 42b on each side of the recess 42a formed to penetrate the recess 42a in the direction of crossing the recess 42a are provided. On a tip end of an excitation rod 64 of a movable body 65 of electromagnetic driving means 6, a projection 64a to be fitted into the recess 42a, and a second penetration hole 64b formed on the projection 64a so as to match with the first penetration holes 42b, 42b are provided. The projection 64a is fitted into the recess 42a, and a rivet (locking tool) 67 is inserted into the first penetration holes 42b, 42b and the second penetration hole 64b for fixing, to thereby accomplish connection between the connecting member 42 and the excitation rod 64.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration control type vibration isolator suitably used as, for example, an engine mount or a suspension bush for a vehicle.

[0002]

2. Description of the Related Art Conventionally, when an engine serving as a vibration source is mounted on a vehicle, an engine mount as a vibration isolator is interposed between a support such as a body frame and a supported body such as a power unit. I am trying to install it. As such an engine mount, for example, a vibration control type vibration isolator as shown in FIG. 3 is known.

This vibration control type vibration isolator comprises a first mounting member 101 mounted on one member and a first mounting member 10
A rubber elastic body 102 having a concave portion 121 having one end fixed to 1 and opening to the other end, and a bottomed cylindrical second mounting member fixed to the outer periphery of the other end of the rubber elastic body 102 and mounted to the other member. A vibrating member 104 forming a liquid enclosing chamber in which the liquid L is sealed between the inner peripheral portion of the second elastic member 103 and the recess 121 of the rubber elastic body 102; The liquid enclosing chamber is partitioned into a main liquid chamber 156 and a sub liquid chamber 157 with its peripheral edge held on the inner periphery of the member 103, and an orifice passage 152 communicating the main liquid chamber 156 and the sub liquid chamber 157 is formed. A member 105 and electromagnetic driving means 106 provided behind the vibration member 104 and having a movable body 165 for controlling the internal pressure of the liquid filling chamber by vibrating the vibration member 104 with an electromagnetic force are provided.

The vibration member 104 in the vibration control type vibration isolator includes a vibration plate 141 formed in a disk shape,
A ring-shaped diaphragm 14 having a cylindrical holding metal member 143 and an inner peripheral end portion vulcanized and bonded to the outer peripheral edge portion of the vibration plate 141, and an outer peripheral end portion vulcanized and bonded to the inner peripheral surface of the holding metal member 143.
4. Then, the vibration member 104
Is fastened to the movable body 165 by screwing a male screw part 141a protruding from the vibration plate 141 and a female screw part 165a provided on the movable body 165 side.

In this vibration control type vibration isolator, the first mounting member 101 is fixed to one of the engine and the vehicle body, and the second mounting member 103 is fixed to the other of the engine and the vehicle body. Installed by doing. The vibration in the high frequency region generated from the engine is effectively absorbed by the elastic deformation of the rubber elastic body 102, and the vibration in the low frequency region such as the engine shake is caused by the volume change of the main liquid chamber 156 and the sub liquid chamber 157. As a result, the liquid L flowing through the orifice passage 152 is effectively absorbed by the liquid column resonance action.

At the time of vibration input, the electromagnetic driving means 10
By driving the movable member 165 to vibrate the vibration plate 141 of the vibration member 104 by the movable body 165 and controlling the internal pressure of the liquid filling chamber, the vibration-proof characteristics of the vibration-proof device are appropriately changed. For example, by vibrating the vibration member 104 in the same phase as the input vibration,
By positively generating the internal pressure of the main liquid chamber 156, the damping effect can be improved.
Is vibrated in a phase opposite to the input vibration to absorb or reduce the internal pressure of the main liquid chamber 156, whereby a low dynamic spring effect can be obtained.

[0007]

By the way, the above-mentioned conventional vibration control type vibration damping device has a vibration plate 141 of the vibration member 104.
And the movable body 165 of the electromagnetic drive means 106 are fastened by screwing, so that when vibration is generated with the operation of the electromagnetic drive means 106, loosening of the fastening portion is likely to occur. Conventionally, a screw lock member, a screw fixing agent, or the like is used to prevent the occurrence of loosening. However, if the operation of the electromagnetic driving means 106 is frequently performed, it is possible to reliably prevent the occurrence of loosening. Can not.

Further, when the vibration plate 141 and the movable body 165 are fastened by screwing, the vibration plate 141
Since it is fixed to the second mounting member 103 via the joint 4, a sufficient tightening torque cannot be obtained, so that there is also a problem that the fastening cannot be performed securely. The present invention has been devised in view of the above-described problem, and does not cause loosening during use as in the case of screwing, and enables vibration control that can reliably connect the vibration member and the movable body. An object of the present invention is to provide a mold vibration isolator.

[0009]

According to a first aspect of the present invention, there is provided a first mounting member, a rubber elastic body having one end fixed to the first mounting member, and a rubber elastic body. A second mounting member fixed to an end side to form a sealed space inside, and an outer peripheral edge fixed and held on an inner periphery of the second mounting member so that one side of the space is made liquid-tight. A vibrating member that forms a liquid enclosing chamber in which a liquid is sealed inside the lid and that changes the internal pressure of the liquid enclosing chamber, and a movable body that is disposed behind the vibrating member and vibrates the vibrating member by electromagnetic force And an electromagnetic driving means having: a vibration member, and one of the vibrating member and the movable body has a concave portion and a first through hole formed on both sides of the concave portion so as to penetrate in a direction crossing the concave portion. One of the vibrating member and the movable body is fitted into the recess. The vibrating member and the movable body have a convex portion and a second through hole formed in the convex portion so as to correspond to the first through hole. Means is employed in which the first and second through holes are connected and fixed by a locking tool inserted through the second through hole.

According to this means, the relative rotation between the vibrating member and the movable body is regulated by the locking member being inserted and fixed in the first through hole and the second through hole. The vibrating member and the movable body are connected with each other in a state in which the escape and relative movement are prevented. Thus, unlike the case of screwing, shortage of the tightening torque does not occur, and loosening does not occur with use, and the connection between the vibration member and the movable body can be ensured.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view of the vibration control type vibration damping device according to the present embodiment, and FIG. 2 is an explanatory diagram showing an assembled state of the vibration control type vibration damping device. As shown in FIG. 1, the vibration control type vibration damping device of the present embodiment has a first mounting member 1.
Rubber elastic body 2 having one end fixed to first mounting member 1
A second mounting member 3 fixed to the other end side of the rubber elastic body 2 to form a sealed space therein; and a space portion in which an outer peripheral edge thereof is fixedly held on an inner periphery of the second mounting member 3. A vibrating member 4 which forms a liquid enclosing chamber in which the liquid L is sealed and has a liquid-enclosed inside, and an inner peripheral edge of the second mounting member 3 A partition member 5 whose part is fixed and held to partition the liquid enclosing chamber into a main liquid chamber 56 and a sub liquid chamber 57; and a vibration member 4 provided behind the vibration member 4.
And an electromagnetic driving means 6 having a movable body 65 that vibrates the electromagnetic wave by an electromagnetic force.

The first mounting member 1 includes a shaft portion 11 and a substantially frustoconical block portion 12 formed at the tip of the shaft portion 11.
And a flange portion 13 formed between the shaft portion 11 and the block portion 12. The shaft portion 11 is provided with a screw hole 11a extending in the axial direction.
At the time of mounting the first mounting member 1, a mounting bolt (not shown) is screwed.

The rubber elastic body 2 is formed in a substantially frustoconical shape by rubber, and the central portion on the upper end side in FIG.
The mounting member 1 is fixed to the outer peripheral surface of the block portion 12 by vulcanization bonding. At the lower end of the rubber elastic body 2, a concave portion 21 opening to the lower end is formed. A cylindrical holding frame 22 is fixed to the outer peripheral surface on the lower end side of the rubber elastic body 2 by vulcanization bonding.

The second mounting member 3 has a cylindrical portion 31 formed in a cylindrical shape, and a bottomed cylindrical shape having a smaller diameter than the cylindrical portion 31, and the opening side thereof is caulked and fixed to one end of the cylindrical portion 31. And a mounting bolt 33 fixed to the bottom of the small-diameter cylindrical portion 32. The holding frame 22 of the rubber elastic body 2 is fitted and fixed to the upper end side inside the cylindrical portion 31.
As a result, the open end of the cylindrical portion 31 is covered with the concave portion 21 of the rubber elastic body 2, and a closed space is formed inside the second mounting member 3. At the center of the bottom of the small-diameter cylindrical portion 32, an insertion hole 34 through which a vibration rod 64 described later is inserted is provided.

The vibrating member 4 includes a vibrating plate 41 formed in a disk shape, a columnar connecting member 42 fitted and fixed to the center of the vibrating plate 41, a cylindrical holding bracket 43, A ring-shaped diaphragm 44 has a peripheral end vulcanized and bonded to the outer peripheral edge of the vibrating plate 41 and an outer peripheral end vulcanized and bonded to the inner peripheral surface of the holding bracket 43. The vibrating member 4 includes a holding fitting 43
Are fitted and fixed to the lower end side inside the cylindrical portion 31 of the second mounting member 3. Thus, a liquid sealing chamber that is liquid-tightly sealed is formed between the vibration member 4 and the recess 21 of the rubber elastic body 2 in the internal space of the second mounting member 3. In the liquid sealing chamber, for example, an incompressible liquid L such as water, alkylene glycol, or silicone oil is sealed.

The connecting member 42 of the vibration member 4
Is provided with a concave portion 42a on the tip end surface protruding downward from the vibration plate 41.
Having. The recess 42a is formed by a groove that extends in the radial direction through the axis and has both ends opened to the outer peripheral surface. Further, portions protruding bifurcated on both sides of the concave portion 42a of the connecting member 42 are provided with the concave portions 42a through the axial center.
The first through holes 42b, 42b penetrating in a direction crossing the circle and having a circular cross section and a constant diameter are provided. The connecting member 42 is connected to a vibration rod 64 of the electromagnetic driving means 6 as described later in detail.

The partition member 5 includes a disk-shaped partition metal fitting 51.
An orifice forming metal part 53 joined to one surface of the partition metal part 51 and projecting in a cylindrical shape to form an orifice passage 52 which makes a substantially two rounds with the partition metal part 51 in the circumferential direction; and an inner peripheral surface of the orifice forming metal part 53 And a supporting rubber 55 that forms a working chamber 54 between the orifice forming fitting 53 and the orifice forming fitting 53 by vulcanization bonding. This partition member 5
The second mounting member 3 is held in a state where the overlapped outer peripheral ends of the partitioning member 51 and the orifice forming member 53 are held between the holding frame 23 of the rubber elastic body 2 and the holding member 44 of the vibration member 4.
Is fixedly held on the inner periphery of the. Thereby, the partition member 5
Separates the liquid filling chamber into a main liquid chamber 56 on the rubber elastic body 2 side and a sub liquid chamber 57 on the vibration member 4 side.

One end of the orifice passage 52 communicates with the main liquid chamber 56 through an opening 52a formed in the partition member 51, and the other end of the orifice passage 52 forms an auxiliary liquid chamber 57 through an opening 53a formed in the orifice forming member 53. The main liquid chamber 56 and the sub liquid chamber 57 are communicated with each other. The orifice forming metal fitting 53 has an opening 53b communicating with the working chamber 54 at a substantially intermediate position of the orifice passage 52. The support rubber 55 is fixed and held on the vibration plate 41 of the vibrating member 4 by a cap-shaped mounting member 55a.

The electromagnetic driving means 6 comprises a first yoke 61, a second yoke 62, a movable body 65 comprising a movable element 63 and a vibrating rod 64, and a coil section 66 as main elements, and a second mounting means. It is housed in the small-diameter cylindrical portion 32 of the member 3 and is arranged behind the vibration member 4. The first yoke 61 is formed in a cylindrical shape having an inward flange at one end (upper end in FIG. 1). The second yoke 62 includes the first yoke 6.
1 is fitted to the other end and protrudes inward at the center.
2a. At the center of the protruding portion 62a, a circular hole 62 which is aligned with the insertion hole 34 of the small-diameter cylindrical portion 32 and penetrates in the axial direction.
b is formed. The mover 63 of the movable body 65 is
The first yoke 61 is inserted and disposed inside the flange portion of the first yoke 61 so as to face the protruding portion 62 a of the yoke 62.

The vibrating rod 64 is fitted and fixed in the central hole of the mover 63, and its lower end is fitted in the through hole 62b of the protruding portion 62a and the insertion hole 34 of the small diameter cylindrical portion 32. The upper end is connected to the connecting member 42 of the vibration member 4 described above. On the upper end surface of the vibrating rod 64,
A convex portion 64 having a size matching the concave portion 42a of the connecting member 42
a is provided. When the projection 64a is fitted into the recess 42a of the connecting member 42, the first through-holes 42b, 42b are located at positions corresponding to the first through-holes 42b, 42b of the connecting member 42. A second through hole 64b having the same cross-sectional shape as that of the second through hole 64b is provided.

The vibrating rod 64 and the connecting member 42 have the convex portion 64a fitted into the concave portion 42a and the first through holes 42b,
A rivet (locking tool) 67 is inserted into and fixed to the second through hole 64b and the second through hole 64b. Rivet 6
7 has a size corresponding to the first through holes 42b, 42b and the second through hole 64b so as to prevent play between the vibrating rod 64 and the connecting member 42. As a result, the vibration rod 64 and the connecting member 42 are connected in a state where the relative rotation is restricted and the protrusion 64a and the recess 42a are prevented from coming out and relative moving.

When the vibrating rod 64 is connected to the connecting member 42, the vibrating rod 64 has a predetermined distance (magnetic gap) between the protruding portion 62a of the second yoke 62 and the opposing surface of the mover 63 opposing the protruding portion 62a. Part) is formed. The coil section 66 includes the first yoke 61 and the second yoke 61.
It is housed and arranged in an annular space formed by the yoke 62 and the mover 63 in an insulated state with resin or the like.

The electromagnetic driving means 6 configured as described above is
When a current is applied to the coil portion 66 via the lead wire 66a, an annular magnetic path extending between the first yoke 61, the second yoke 62, and the mover 63 is formed. As a result, the protrusion 62a of the second yoke 62 and the movable element 6
The movable member 63 is attracted to the protruding portion 62a of the second yoke 62 by forming a magnetic gap between the movable member 63 and the vibrating rod 6 that moves together with the movable member 63.
4 drives the diaphragm 41 connected via the connecting member 42. As a result, the internal pressure of the working chamber 54 changes, so that the internal pressure of the working chamber 54 can be controlled by controlling the energization of the coil portion 66, whereby the vibration isolation characteristics of the vibration control type vibration isolator are appropriately changed. It is supposed to be.

The assembly of the vibration control type vibration damping device of this embodiment is performed as follows. First, a first molded body is formed by integrally vulcanizing the rubber elastic body 2 together with the first mounting member 1 and the holding frame 22, and the supporting rubber 55 is integrally vulcanized together with the partition member 5 and the mounting bracket 55a. Thereby, the second molded body is formed, and the vibration member 4
The third molded body is formed by integrally vulcanizing the diaphragm 44 together with the holding fitting 43. Then, the mounting member 55a of the partition member 5 is fitted and fixed to the vibration plate 41 of the vibrating member 4, thereby integrating the second molded body and the third molded body.

Next, in a liquid tank filled with the liquid L to be filled in the liquid filling chamber, the holding frame 22 of the first molded body, By sequentially fitting the holding members 43 of the molded body and the third molded body, as shown in FIG. 2, the liquid is filled in the liquid enclosing chamber formed between the concave portion 21 of the rubber elastic body 2 and the vibration member 4. The intermediate product 7 in which L is enclosed is formed.

Next, the vibrating rod 64 of the electromagnetic driving means 6 is attached to the connecting member 42 of the intermediate product 7 in the atmosphere. That is, the vibration rod 64 is provided in the concave portion 42a of the connecting member 42.
Of the first through hole 42b and the second through hole 64b, which are aligned on a straight line, in this state.
Is inserted and fixed, so that the connecting member 42 and the vibration rod 64 are connected.

Then, the first yoke 61, the second yoke 62 and the coil part 66 of the electromagnetic driving means 6 are accommodated and arranged in the small-diameter cylindrical part 32 of the second mounting member 3, and the circular hole 62 of the second yoke 62 is provided.
b and the lower end of the vibrating rod 64 is inserted into the insertion hole 34 of the small-diameter cylindrical portion 32 so that the cylindrical portion 3 of the second mounting member 3 is inserted.
An opening end of the small-diameter cylindrical portion 32 is swaged and fixed to the lower end of the first cylindrical portion 32. Thus, the assembling work is completed, and the vibration control type vibration isolator as shown in FIG. 1 is completed.

In the vibration control type vibration damping device of the present embodiment configured as described above, the small-diameter cylindrical portion 32 of the second mounting member 2 is fixed to one of the engine side and the vehicle body side by the mounting bolt 33. At the same time, the shaft-like portion 11 of the first mounting member 1 is mounted on the engine side or the vehicle body side by fixing it with a mounting bolt (not shown) or the like, and used.

The vibration in the high frequency region generated from the engine is effectively absorbed by the elastic deformation of the rubber elastic body 2, and the vibration in the low frequency region such as the engine shake is
The liquid L flowing through the orifice passage 52 with the volume changes of the main liquid chamber 56 and the sub liquid chamber 57 is effectively absorbed by the liquid column resonance action. In addition, at the time of vibration input, by driving the electromagnetic driving means 6 to vibrate the vibrating plate 41 of the vibrating member 4 by the vibrating rod 64 and controlling the internal pressure of the action chamber 54, the vibration isolating characteristics of the vibration isolating device are improved. It is changed as appropriate. For example,
By vibrating the vibrating member 4 in the same phase as the input vibration to positively generate the internal pressure of the working chamber 54 and the main liquid chamber 56, the damping effect is improved, while the vibration plate 41 of the vibrating member 4 is improved. Is vibrated in a phase opposite to that of the input vibration to absorb or reduce the internal pressure of the working chamber 54 and the main liquid chamber 56, thereby obtaining a low dynamic spring effect.

As described above, according to the vibration control type vibration damping device of the present embodiment, the connecting member 42 of the vibration member 4 and the vibration rod 64 of the electromagnetic driving means 6 are connected to the recess 42 of the connecting member 42.
The first through-hole 42b and the second through-hole 6 are aligned with the projection 64a of the vibrating rod 64.
Since the rivets 67 are connected to each other by inserting and fixing the rivets 4b, shortage of tightening torque may occur or loosening may occur with use as in the case of connection by conventional screwing. Therefore, the connection between the vibration member 4 and the vibration rod 64 can be ensured. Further, when connecting the connecting member 42 and the vibration rod 64, positioning and centering can be performed with high accuracy.

In this embodiment, the first through hole 42b of the connecting member 42 and the second through hole 64b of the vibrating rod 64
The rivet 67 is used as a locking tool to be inserted and fixed in the device. However, for example, a C-shaped lock pin or a C-shaped spring cotter can be used instead. Further, in the vibration control type vibration damping device of the present embodiment, the concave portion 42a is
2, and the projection 64a is provided on the vibrating rod 64, but they can be provided so that the relationship between these projections and depressions is reversed. In this case, the shapes of the concave portion 42a and the convex portion 64a can be appropriately changed as long as they are formed in the same size.

In this embodiment, the electromagnetic driving means 6 used to vibrate the vibration member 4 is
The basic structure for operating 5 by electromagnetic force is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention. Further, in the present embodiment, the internal structure of the liquid filling chamber formed by covering one side in the internal space of the second mounting member 3 with the vibrating member 4 and the partition member 5 are also limited to those of the above embodiment. Without being changed, various changes can be made.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a vibration control type vibration damping device according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing an assembled state of the vibration control type vibration damping device according to the embodiment of the present invention.

FIG. 3 is a cross-sectional view of a conventional vibration control type vibration damping device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1, 101 ... 1st mounting member 2, 102 ... Rubber elastic body 3, 103 ... 2nd mounting member 4, 104 ... Vibration member 5, 105 ... Partition member 6, 106 ... Electromagnetic drive means 11 ... Shaft part 11a ... Screw Hole 12: Block 13: Flange 21, 121: Depression 2
2 ... holding frame 31 ... cylindrical part 32 ... small-diameter cylindrical part 33 ... mounting bolts 41, 141 ... vibration plate 42 ... connecting member 42
a ... concave portion 42b ... first through holes 43, 143 ... holding fittings 44, 144 ... diaphragm 51 ... partitioning fitting 52 ... orifice passage 52a ... opening 53 ... orifice forming fitting 53a ... opening 5
3b Opening 54 Working chamber 55 Support rubber 55a Mounting brackets 56, 156 Main liquid chamber 57, 157 Sub liquid chamber 61 First yoke 62 Second yoke 62a
... projecting part 62b ... circular hole 63 ... mover 64 ... vibrating rod 64a ... convex part 64b ... second through hole 65, 1
65 movable body 66 coil part 66a lead wire 67 rivet (locking tool)

Claims (1)

[Claims] A first mounting member, a rubber elastic body having one end fixed to the first mounting member, and a second elastic body fixed to the other end of the rubber elastic body to form a sealed space therein. An attachment member, an outer periphery of which is fixedly held on an inner periphery of the second attachment member to form a liquid enclosing chamber in which a liquid is sealed inside by covering one side of the space portion in a liquid-tight manner; A vibrating member that varies the internal pressure of the liquid filling chamber; and an electromagnetic drive unit that is disposed behind the vibrating member and that has a movable body that vibrates the vibrating member with an electromagnetic force. The vibrating member and the movable body Has a concave portion and a first through-hole formed on both sides of the concave portion so as to penetrate in a direction crossing the concave portion. One of the vibrating member and the movable body is provided in the concave portion. A convex portion to be fitted, and a first portion formed in the convex portion so as to correspond to the first through hole. The vibrating member and the movable body are connected and fixed by the engaging member having the convex portion fitted into the concave portion and inserted into the first through hole and the second through hole. A vibration control type vibration damping device, characterized in that: