JPH0516417Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a viscous damper used for vibration damping.

(Prior art) As a conventional viscous damper, for example,
Those described in JP-A-25361 and JP-A-53-40163 are known.

The former viscous damper has a disk fixed to the spindle,
A casing is rotatably provided on a support shaft so as to surround the disc, and a narrow gap is maintained between the casing and the disc, and the inside of the casing is filled with viscous liquid, and the support is The shaft was attached to one of the vibrating body or the support, and the casing was attached to the other of the vibrating body or the support.

The damper is formed into a rotary damper that damps vibrations by providing shear resistance by the viscous liquid in the gap against relative rotation between the disc and the casing due to the vibrations of the vibrating body.

In addition, in the latter viscous damper, the inner cylinder is surrounded by the outer cylinder so that both ends of the inner cylinder extend outside the outer cylinder, and a narrow gap is maintained between the inner cylinder and the outer cylinder. The inner cylinder and the outer cylinder are supported so as to be slidable in the axial direction, the space between the inner cylinder and the outer cylinder is filled with viscous liquid, and one end of the inner cylinder is connected to the vibrating body or the support body. It was attached to one side, and the outer cylinder was attached to the other side of the vibrating body or support body.

The damper was formed into a so-called double rod type damper that damps vibrations by providing shear resistance by the viscous liquid in the gap against relative sliding in the axial direction between the inner cylinder and the outer cylinder due to the vibration of the vibrating body. .

(Problem to be solved by the invention) However, since the former type of conventional viscous damper is a rotary damper, the relative displacement between the vibrating body and the support due to the vibration of the vibrating body is There was a problem in that it became necessary to provide a mechanism to convert the movement into rotation with the plate, and the structure became complicated accordingly.

In addition, since the latter viscous damper is a double rod type damper, it does not require a motion conversion mechanism like the former, and has the advantage that there is no change in the volume of the gap as the inner cylinder moves back and forth. However, in this installed state, the other end of the inner cylinder protrudes from the outer cylinder, so this protrusion gets in the way during installation, making it difficult to install in a cramped space. It was hot.

(Means for Solving the Problems) The present invention was made to solve the above-mentioned conventional problems, and for this reason, in the viscous damper of the present invention, there is a gap between the vibrating body and the support body. In a viscous damper that damps the input vibration by applying shear resistance by the viscous liquid in the gap when a plate member is interposed and moves relative to each other through a predetermined gap, the viscous damper is installed with a vibrating body at the base end. A vibrating body side plate member having a portion formed thereon, a support side plate member having a support attachment portion formed at its base end, and both plate members facing in parallel with a narrow gap and facing each other. A holding mechanism is provided between both plate members so as to support the plate members in a reciprocating manner, both ends are fixed to each of the plate members, the body is formed into a bellows part, and the body part is formed as a bellows part, and is straddled between the plate members. The structure includes a sealing cover that encloses both plate members, and a viscous liquid filled in the sealing cover.

(Function) In the viscous damper of the present invention, the vibrating body side plate member and the supporting body side plate member move relative to each other in the parallel direction due to the relative displacement between the vibrating body and the supporting body due to the vibration of the vibrating body, and both plate members Since the viscous liquid in the gap provides shear resistance to the relative movement of the vibration body and the support body, vibrations between the vibrating body and the support body are attenuated through both plate members.

Since the viscous damper of the present invention is formed into a telescoping damper, it does not require a motion conversion mechanism like a rotary damper, and it does not require one end of the inner cylinder to protrude like a double rod damper. There are no problems caused by this.

In addition, since both ends of the sealing cover are fixed to each of the plate members and the body is formed into a bellows part, the sealing cover can be attached only by deforming the bellows part as the plate members move relative to each other. No volume change occurs within the sealing cover, no pressure change occurs due to the volume change, and liquid leakage is also prevented because both plate members are fixed and there is no seal.

(Example) Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

As shown in FIG. 3, the viscous damper A of the first embodiment is used for an engine mount of an automobile, and is interposed between an engine E as a vibrating body and a vehicle body F as a support body. As shown in the drawings and FIG. 2, the main components include an engine side plate member 1, a vehicle body side plate member 2, holding mechanisms 100, 101, a sealing cover 6, and a viscous liquid 7.

The holding mechanisms 100 and 101 are spacers 31 and 32
and guide pins 41 and 42.

The engine side plate member 1 is formed into a narrow plate made of a flat steel plate, and a collar 11 that serves as an attachment part to the engine E is welded to the base end.
is attached to the engine bracket 13 via an insulator rubber 12, a guide hole 1a is formed along the longitudinal direction in the middle part, and a holding mechanism 101 is attached to the tip part.

The vehicle body side plate member 2, like the engine side plate member 1, is formed into a narrow plate made of a flat steel plate,
A collar 21 is welded to the base end to serve as an attachment part to the vehicle body F, and the collar 21 is attached to the vehicle body bracket 23 via an insulator rubber 22, and a guide is provided along the longitudinal direction in the middle part. hole 5
2 is formed, and a holding mechanism 100 is attached to the tip.

Both the plate members 1 and 2 are attached to the holding mechanism 10.
0 and 101 in a parallel state extending in opposite directions, facing each other with a narrow gap S therebetween, and supported so as to be relatively movable (expandable and contractable) in the longitudinal direction.

The sealing cover 6 is formed as a bag-like flexible cover made of rubber material or the like, and has a bellows part 61 formed on the body, and extends over both the plate members 1 and 2. At the same time, both ends 62 and 63 are fixed to the plate members 1 and 2 in a watertight manner, respectively.

A silicone liquid is used as the viscous liquid 7, and is placed in the sealing cover 6 so as to fill it.

Next, the operation of this embodiment will be explained.

Engine E and vehicle body F are caused by the vibration of engine E.
When there is a relative displacement between the plate members 1 and
2, by guiding the guide pins 41 and 42 along the guide grooves 1a and 2a, respectively, with the gap S maintained by the spacers 31 and 32,
This results in relative reciprocating movement (expansion and contraction) in the longitudinal direction. Since shear resistance is provided by the viscous body 7 in the gap S to the relative reciprocating movement of both plate members 1 and 2, there is a gap between engine E and vehicle body F via both plate members 1 and 2. vibrations are damped.

Moreover, the sealing cover 6 is formed into a flexible cover,
Since it is fixed to both plate members 1 and 2, the sealing cover 6 only deforms as the plate members 1 and 2 move back and forth relative to each other, but does not change in volume.

Next, FIGS. 4 and 5 show a viscous damper B according to a second embodiment.

This viscous damper B has both plate members 10 and 20 formed of spring steel plates, and one plate member 1.
0 has folded parts 50, 50 formed on both side edges, the other plate member 20 has a protrusion 30 formed in the center, and the protrusion 30 of the other plate member 20 is applied to one plate member 10. The supporting structure is such that both side edges of the other plate member 20 are slidably fitted into the folded portions 50, 50 of one plate member 10.

The folded portion 50 and the protrusion 30 constitute a holding mechanism 200.

Therefore, in this viscous damper B, the plate members 10,
Since the plate member 20 is made of a spring steel plate, the plate member 1
0, 20, the vibrating body, and the support body, the positional deviation can be absorbed by the deflection of the plate members 10, 20 in the thickness direction, and the plate members The structure of the attachment portion formed at the base end of 10, 20 can be simplified.

Further, since the protrusions 30 and folded portions 50, 50 are formed on the plate members 20, 10 themselves, the number of parts can be reduced and the structure can be simplified.

Other operations are the same as those in the first embodiment, and therefore the description thereof will be omitted. Also, the same reference numerals in the drawings are used for the same parts as those in the first embodiment, and the description thereof will be omitted.

Although the embodiments of the present invention have been described above with reference to the drawings, the specific configuration of the present invention is not limited to the above-mentioned embodiments, and the invention may be modified even if there are design changes within the scope of the gist of the invention. included.

For example, the viscous damper of the present invention can be used not only between the engine and the body of a vehicle such as an automobile, but also between a vibrating body and a support for vibration isolation in various industrial machines. can do.

Further, the number of both plate members is not limited to one each, and a plurality of plates may be used.

Further, the viscous liquid is not limited to silicone liquid, but natural rubber liquid, synthetic rubber liquid, etc. can be used, and an electrofluid whose viscosity changes depending on the voltage can also be used.

(Effects of the invention) As explained above, according to the viscous damper of the invention, the vibrating body side plate member and the supporting body side plate member can be made to face each other in parallel with a narrow gap, and can be moved relative to each other in a reciprocating manner. a holding mechanism provided between both plate members, both ends of which are fixed to each of the plate members, and a body portion formed into a bellows portion so as to be supported by the plate member;
Because it has a structure that includes a sealing cover that spans between the two plate members and envelops both plate members, and a viscous liquid that fills the sealing cover, the structure is simpler than the rotary type, and the double rod type While achieving improved installation ease compared to the previous model, there is no problem such as liquid leakage from sealing parts due to pressure changes due to volume changes, and when vibration input occurs when both plate members move back and forth relative to each other, The shear resistance provided by the viscous liquid within the gap provides the effect that input vibrations can be effectively damped.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a viscous damper according to a first embodiment of the present invention, FIG. 2 is a sectional view taken from FIG. A sectional view showing the viscous damper of the embodiment, FIG. 5 is a sectional view taken from FIG. 4. A, B... Viscous damper, E... Engine (vibrating body), F... Vehicle body (support body), S... Gap, 1,1
0...Engine side plate member (vibrating body side plate member), 2,
20...Vehicle side plate member, (support body side plate member), 6...
... Sealing cover, 7... Viscous liquid, 100, 101,
200...Retention mechanism.

Claims (1)

[Claims for Utility Model Registration] Interposed between the vibrating body and the support body for a specified period
When a vibration is input through which the plate member moves relative to each other, the time 〓
A viscous damper that damps input vibration by applying shear resistance with a viscous liquid inside the damper includes a vibrating body side plate member with a base end formed with an attachment part to the vibrating body, and a base end with an attachment part to the support body. a supporting body side plate member formed; a holding mechanism provided between both plate members so as to hold the plate members parallel to each other with a narrow gap between them, and to support the plate members so as to be movable relative to each other; Both ends are fixed to each of the plate members,
A viscous damper comprising: a sealing cover whose body portion is formed into a bellows portion, and which extends between both plate members and envelops both plate members; and a viscous liquid filled in the sealing cover.