JPH0643554Y2 - Viscous damper - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a viscous damper used for vibration damping.

(Prior Art) As a conventional viscous damper, for example, JP-A-49-25361 can be used.
The one described in Japanese Patent Publication is known.

The viscous damper includes a disc fixed to the support shaft as one damper member, and a casing as the other damper member rotatably provided on the support shaft so as to surround the disc. A narrow gap is maintained between the casing and the disc, a seal member is provided between the casing and the support shaft, the casing is filled with viscous liquid, and the support shaft is relatively displaced. Of the displacement member, and the casing is attached to the other displacement member.

Further, the rotary damper is formed so as to damp the vibration by giving a shearing resistance due to the viscous liquid in the gap to the relative rotation between the disc and the casing due to the vibration of the displacement member.

Further, in this case, as the seal structure of the rotary sliding contact portion due to the relative rotation of the disc and the casing, the seal member has only the seal surface for sealing only the outer peripheral surface of the support shaft. It was the one.

(Problems to be solved by the invention) However, in the conventional viscous damper, the sealing structure for the rotary sliding contact portion only seals between the outer peripheral surface of the support shaft and the seal surface of the seal member. Since it is a surface, there is a problem that the sealing property is poor and liquid leakage occurs from the rotary sliding contact portion.

(Means for Solving Problems) The present invention has been made to solve the above-mentioned conventional problems. Therefore, the viscous damper of the present invention is
In a viscous damper interposed between displacement members that are relatively displaced, one damper member attached to one displacement member and another damper member attached to the other displacement member, and a narrow gap is provided between the one damper member. The other damper member that is held so as to be relatively rotatable, the viscous liquid that fills the gap between both damper members, and the other damper that is fixed to one damper member side and that is caused by the relative rotation of both damper members. It is configured to include a seal member in which an inner seal surface and an outer seal surface are formed to seal the rotary sliding contact edge portion of the member from both inside and outside.

(Operation) In the viscous damper of the present invention, both damper members relatively rotate due to relative displacement of the displacement member due to vibration, and shear resistance due to viscous liquid in the gap is given to relative rotation of both damper members. Therefore, the vibration between the displacement members is damped.

Further, the seal structure of the rotary sliding contact portion due to the relative rotation of both damper members is such that the seal member fixed to one damper member side causes the rotary sliding contact edge portion of the other damper member due to the relative rotation of both damper members. On the other hand, the inner seal surface and the outer seal surface that are sandwiched from both inside and outside are formed, so a double seal that sandwiches the rotary sliding contact edge portion from both sides is formed, and the seal portion and sealing area are increased, and both seal surfaces are A labyrinth in which the direction of the liquid path changes is formed between the two, and the sealing property is improved.

Embodiment An embodiment of the present invention will be described in detail below with reference to the drawings.

As shown in FIG. 3, the viscous damper A of the first embodiment includes an engine E, which is one displacement member that is relatively displaced, and another displacement member, which are relatively displaced, for damping roll vibration of the engine on an engine mount portion of an automobile. Interposed between the car body F and
As shown in FIGS. 1 and 2, the disc 10 and the casing 2
0, the seal member 30, and the viscous liquid 40 are provided as main components.

The disk 10 serves as one of the damper members, and the engine E
The collar 101 is fixedly attached to the outer peripheral surface of the collar 101 that serves as a mounting portion for the collar 101, and the collar 101 is mounted to the engine bracket 102 with bolts 103.

The casing 20 serves as the other damper member, and is formed in a flat circular case in which two dish-shaped members 201, 201 are fastened together by caulking metal fittings 203 at outer peripheral flanges 202, 202, and in a state of enclosing the disc 10, The collar 101 is rotatably supported on the outer periphery of the collar 101 so as to maintain a narrow gap 50 with the disc 10.

The casing 20 is attached to the vehicle body bracket 204 via a link 205 as a motion converting mechanism, and the relative displacement between the engine E and the vehicle body F is determined by the link.
It is converted into a relative rotation between the disc 10 and the casing 20 by 205.

The seal member 30 is provided between the disc 10 and the casing 20, and is fitted and fixed to the outer peripheral surface of the collar 101 to form the disc 1.
From the inner seal material 301 interposed between the side surface of 0 and the inner surface of the casing 20, and the outer seal material 302 fitted and fixed to the outer peripheral surface of the collar 101 and abutted on the outer peripheral surface of the casing 20. Become.

The inner sealing material 301 includes a disc 10 and a casing 2
Casing 20 which is a rotary sliding contact part associated with relative rotation with 0
Inner sealing surface 30 that seals from the inside to the inner peripheral edge of
3 is formed, and the outer sealing material 302 has a casing.
Outer sealing surface that seals from the outside to the inner peripheral edge of 20
304 is formed, and the inner and outer sealing surfaces 302, 304 form a seal structure in which the inner peripheral edge portion of the casing 20, which is the sliding contact portion, is sandwiched from both sides.

The viscous liquid 40 fills the gap 50 between the disc 10 and the casing 20, and a silicon liquid is used in this embodiment.

Next, the operation of this embodiment will be described.

Relative displacement between the engine E and the vehicle body F due to the vibration of the engine E is caused by the link 205 serving as a motion converting mechanism.
Is converted into relative rotation between the casing 20 and the casing 20.

Since the viscous liquid 40 in the gap 50 provides a shearing resistance to the relative rotation between the disk 10 and the casing 20, the disk E and the vehicle body F are interposed between the disk 10 and the casing 20. Vibration is dampened.

Further, the sealing structure against the leakage of the viscous liquid 40 is a casing 20 which becomes a rotary sliding contact portion by the inner sealing surface 303 of the inner sealing material 301 and the outer sealing surface 304 of the outer sealing material 302.
Since the inner peripheral edge portion is sandwiched from both inner and outer surfaces, the sealing area for the rotary sliding contact portion is increased, and both sealing surfaces 303, 304 are formed in a labyrinth, so that the sealing performance is significantly improved. .

Next, FIGS. 4 and 5 show the viscous damper B of the second embodiment.

This viscous damper B uses a wire 206 as a motion conversion mechanism for converting the relative displacement between the engine E and the vehicle body F into the relative rotation between the disk 10 and the casing 20,
In this case, the wire receiving ring 207 having a substantially U-shaped cross section is fixed to the outer side surface of the casing 20.
The wire 206 is wound around the wire 206, and both ends of the wire 206 are fixed to the vehicle body.

In the second embodiment, the same parts as those in the first embodiment are designated by the same reference numerals in the drawings, and the description thereof will be omitted, and the operation will be the same as that of the first embodiment. Is omitted.

Next, FIGS. 6 and 7 show the viscous damper C of the third embodiment.

This viscous damper C is a disk 11 that serves as one damper member.
And a disc 20 serving as the other damper member that is rotatably provided while facing the disc 11 with a narrow gap 51.
And a seal member 31 provided between the outer peripheral edges of both discs 11 and 21.
And a viscous liquid 41 filled in the gap 51 between the two disks 11 and 21, and one of the disks 11 is attached to the engine bracket through a link 111 as a motion conversion mechanism at an eccentric position. Further, the other disc 21 is attached to the vehicle body bracket at the eccentric position via a link 211 as a motion converting mechanism.

In addition, the seal member 31 in this case is formed with the fitting holes 311 for the both circular plates 11 and 21, and also has the external sealing material 313 having the locking piece 312 for locking the outer peripheral edge of the one circular plate 11. And both discs
The internal sealing material 314 as a spacer, which is press-fitted into the fitting hole 311 in a state of being interposed between the peripheral edges of the eleventh and eleventh discs and holds the gap 51 between the two discs 11 and 21, and the other disc 21 It is formed of an end seal material 315 press-fitted into the fitting hole 311 in a state where the outer peripheral edge is locked, and one disc 11 is fixed to the seal member 31, and the other disc 21 is Both discs 11 and 21 are rotatably fitted to the seal member 31 and supported so as to be relatively rotatable.

Further, as a sealing structure for the peripheral edge of the other disk 21 which is a rotary sliding contact portion accompanying the relative rotation of the both disks 11, 21, an inner seal for sealing the peripheral edge of the disk 21 from the inside is used. A surface 316 is formed on the inner seal material 314, and an outer seal surface 317 that seals from the outside is formed on the end seal material 315. The inner and outer seal surfaces 316, 317 form a peripheral edge portion of the disc 21, which is a rotary sliding contact portion. A seal structure is formed by sandwiching both sides.

Therefore, in this viscous damper C, the relative displacement between the engine and the vehicle body is converted into the relative rotation of both discs 11 and 21 via the links 111 and 211, and the gap 51 is generated against the relative rotation of both discs 11 and 21. The shear resistance is given by the viscous liquid 41 inside, and the vibration is damped.

Further, the sealing structure of the peripheral portion of the circular plate 21 which is the rotary sliding contact portion is also a two-sided sealing structure sandwiched between the inner sealing surface 316 and the outer sealing surface 317, so that the sealing performance is high.

Next, FIGS. 8 and 9 show a viscous damper D of the fourth embodiment.

This viscous damper D is an inner cylinder 12 that serves as one damper member.
And an outer cylinder 22, which is the other damper member provided relatively rotatably around the inner cylinder 12 so as to maintain a narrow gap 52 between the outer cylinder and the outer peripheral surface of the inner cylinder 12, and an inner cylinder. Sealing members 32, 32 are provided between the end edges of the outer cylinder 22 and the outer cylinder 22, and a viscous liquid 42 filled in a gap 52 between the inner cylinder 12 and the outer cylinder 22.

In this case, the inner cylinder 12 has an annular groove 321 formed in the seal member 32.
The outer cylinder 22 is rotatably fitted in the ring groove 322 formed in the seal member 32, and the inner cylinder 12 is
As a sealing structure for the end edge portion of the outer cylinder 22 which is a rotary sliding contact portion due to relative rotation between the outer cylinder 22 and the outer cylinder 22,
Inner sealing surface 323 that seals the edge of the outer cylinder 22 from the inside
And an outer sealing surface 324 that seals from the outside. The inner and outer sealing surfaces 323 and 324 form a sealing structure in which the end edge portion of the outer cylinder 22, which is a rotary sliding contact portion, is sandwiched from both sides.

The viscous damper D is provided on the mount insulator 62 provided between the engine and the vehicle body. In this case, the collar 621 of the mount insulator 62 is fixed to the vehicle body bracket 622, and the insulator rubber 623 is attached to the bolt 624. Is attached to the engine bracket 625 by the seal member 32 of the viscous damper D and the collar 621.
The outer cylinder 22 is attached to the engine bracket 625 via the leaf spring 626 while being fixed to the outer peripheral surface of the.

Therefore, since the viscous damper D of the fourth embodiment is combined with the mount insulator 62, the vibration damping effect of the mount insulator 62 and the vibration damping effect of the viscous damper D are obtained even though the structure is compact. .

Further, since this viscous damper D has a tubular structure composed of the inner cylinder 12 and the outer cylinder 22, a gap 52 for obtaining shear resistance by the viscous body 42 is formed in the circumference between the inner cylinder 12 and the outer cylinder 22. Therefore, the gap 52 can be secured in such a large area, and a large shear resistance can be obtained.

The other operations are the same as those in the above-mentioned 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 embodiments.
Even a design change within the scope of the invention is included in the invention.

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

Further, the number of damper members is not limited to one each, but a plurality of damper members may be used.

The viscous liquid is not limited to silicone liquid, and natural rubber liquid, synthetic rubber liquid, or the like can be used, or an electric machine fluid whose viscosity changes with the adjustment of voltage can be used.

(Effect of the Invention) As described above, according to the present invention, in the viscous damper in which the viscous liquid is filled between the damper members which can hold the narrow gap and are relatively rotatable, one damper member side And a sealing member having an inner sealing surface and an outer sealing surface for sealing the rotary sliding contact edge portion of the other damper member from both inside and outside with the relative rotation of both damper members. Due to this structure, the double seal structure increases the sealing area and area, and the labyrinth structure formed between the inner and outer sealing surfaces improves sealing performance significantly, resulting in viscous liquid leakage. An effect that a defect can be prevented is obtained.

[Brief description of drawings]

FIG. 1 is a sectional view showing a viscous damper according to a first embodiment of the present invention,
FIG. 2 is a partially cutaway front view of the viscous damper, FIG. 3 is a front view showing an attached state of the viscous damper, FIG. 4 is a sectional view showing the viscous damper of the second embodiment, and FIG. Partially cutaway front view of the viscous damper, FIG. 6 is a sectional view showing the viscous damper of the third embodiment, FIG. 7 is a partially cutaway front view of the viscous damper, and FIG. 8 is the viscous damper of the fourth embodiment. FIG. 9 is a partially cutaway front view of the viscous damper. A: Viscous damper E: Engine (displacement member) F: Vehicle body (displacement member) 10: Disc (damper member) 20: Casing (damper member) 30: Seal member 40: Viscous liquid 50: Gap 303,316,323: Inner sealing surface 304,317,324 : Outer sealing surface

Claims (1)

[Scope of utility model registration request] 1. A viscous damper interposed between displacement members that are relatively displaced, between one damper member attached to one displacement member and the other damper member attached to the other displacement member. The other damper member that holds a narrow gap and is rotatably supported, the viscous liquid that fills the gap between both damper members, and the relative rotation of both damper members that is fixed to one damper member side. And a seal member having an inner seal surface and an outer seal surface, which seal the inner surface and the outer surface of the other sliding member so as to be sandwiched between the inner and outer surfaces. damper.