JPH1082447A - Liquid-sealed vibration control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a stopper fitting in a liquid sealed vibration control device firmly fixable in two or more places so as to be able to sufficiently withstand large load (large displacement) and to be able to display positive and excellent stopper action to vertical displacement and to displacement in a right-angled direction to an axis, thereby improving durability. SOLUTION: A lower end side opening part of a body fitting 1, and a lower bracket 2 are connected by a vibration isolating base body 3 formed of a rubber elastic body interposed between both of them, and a diaphragm 4 is fitted to the upper side of the body fitting 1. An internal chamber formed is partitioned by a partition member 6 into two liquid chambers 7a, 7b communicated through an orifice passage 5, and an upper bracket 8 is fixed to the upper part of the body fitting 1. A lower end side opening edge part 1d of the body fitting 1 is protruded outward at least on both opposed sides so as to form stopper parts 11. An annular stopper fitting 12 is disposed with a clearance between the upper face of each stopper part 11 and the outer peripheral surface of the body fitting 1, and the stopper fitting 12 is provided in an integrally fixable state in two or more places of fastening parts in the lower bracket 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid filled type vibration damping device which is mainly used to support an engine of a small boat or an automobile in a vibration damping manner.

[0002]

2. Description of the Related Art Conventionally, as an anti-vibration device for supporting an engine of a small boat or an automobile as a vibration source so as not to transmit the vibration to a hull or a vehicle body, for example, FIG. As shown in (1), a chamber inside the main body having a vibration-isolating base (53) made of a rubber elastic body is partitioned into two chambers (57a) and (57b) by a partition member (56), and both chambers (57a) and (57b) are orificed. The two chambers (57a) and (57b) are filled with liquid while communicating with each other through the passage (55), and the orifice passage (55) allows the liquid to flow through the two chambers and the vibration-proof effect of the vibration-proof base (53). A liquid-filled anti-vibration mount configured to perform a vibration damping function and a vibration insulating function is known.

In the above apparatus, the upper mounting bracket (58) is usually used by being fastened to the side of the engine which is a vibration generator. However, the vibration isolating base (53) is largely displaced up and down by the vibration of the engine. In order to regulate the height, a projecting portion (61) in which a protruding piece (51a) from the main body fitting (51) is embedded is provided in a part of the vibration-proof base (53), and the upper mounting fitting (58)
A part of a member (62) such as a stabilizer fixed to the stopper is elastically contacted with the overhang portion (61) when the vertical movement (tensile and compressive) due to vibration and the displacement amount in the direction perpendicular to the axis are large. , Thereby suppressing further displacement.

[0004] However, the stopper mechanism having the above structure also has a stopper function for movement in three directions of up and down, left and right, and back and forth. However, the contact of the stopper portion is performed only on one side of the vibration isolator, and furthermore, such as a stabilizer, etc. Since the member (62) is fixed only at one fastening portion of the engine mounting bolt (59) provided on the upper mounting bracket (58), the supporting strength as a stopper is not sufficient, and When an unexpected large load (large displacement) is applied, the stabilizer may be deformed, and eventually, the rubber portion of the vibration-proof base may be damaged.

The present invention has been made in view of the above, and has a structure in which a stopper can be firmly fixed at two or more places and sufficiently withstands a large load (large displacement). It is an object of the present invention to provide a liquid-filled type vibration damping device which can exert a reliable and good stopper action on the liquid crystal and can improve the durability.

[0006]

According to the present invention, an opening at the lower end of the main body and a lower mounting metal disposed below the opening are provided by a vibration-proof base made of a rubber elastic body interposed therebetween. At the same time, a diaphragm made of a rubber film is attached to the upper side of the main body fitting, and the sealed inner chamber is partitioned into two liquid chambers communicating with each other through an orifice passage by a partition member. A liquid-filled type vibration damping device having a mounting bracket fixed thereto, wherein a lower end side opening edge portion of a main body bracket is formed as a stopper portion by projecting outward at least on both opposing sides. An annular stopper fitting is provided with a predetermined gap between the outer fitting surface and the outer peripheral surface of the main fitting, and the stopper fitting is provided so as to be integrally fixed at two or more fastening portions to the vehicle body or the like in the lower mounting fitting. , And the above upper mounting An engine mounting bolt protruding from the fitting is provided with a seated nut for supporting a bracket on the engine side, and a nut for locking to the upper mounting bracket to prevent the bolt from being loosened. .

According to the liquid-filled type vibration damping device of the present invention, the body bracket is displaced up and down, back and forth, left and right with respect to the lower mounting bracket due to the elasticity of the vibration isolating base made of a rubber elastic body due to the vibration of the supported engine. However, at this time, at the time of large upward displacement, the stopper portion integrated with the main body fitting abuts against the annular stopper fitting fixed to the lower mounting fitting, and further displacement is suppressed. Further, when the main body is greatly displaced in the front-rear direction and the right and left directions, the outer peripheral surface of the main body comes into contact with the inner periphery of the annular stopper, thereby preventing further displacement.

In particular, in the case of the present invention, the stopper portion and the main body metal can abut against the annular stopper metal at least on opposite sides, and the stopper metal is fixed by two or more fastening portions of the lower mounting metal. As a result, the stopper function is reliably and favorably performed without deformation of the stopper fitting, and the rubber material of the stopper portion and the rubber material of the vibration isolating base are not damaged.

Further, the fixing position of the bracket on the engine side with respect to the engine mounting bolt can be appropriately adjusted by the seat nut, so that the bolt can be stably and reliably connected to the predetermined height position and supported. Moreover, the load due to the engine weight or the like acting on the engine mounting bolt can be supported by the engagement portion between the nut for preventing loosening provided on the bolt and the upper mounting bracket. Bolt loosening and rattling can be prevented.

[0010] In the above-mentioned liquid-sealed type vibration damping device, it is preferable that a part of the lower mounting bracket is formed as a stopper receiving portion that comes into contact with the stopper when the stopper is largely displaced downward. Accordingly, when a large load (large displacement) is applied downward due to engine weight or the like, the stopper portion comes into contact with the stopper receiving portion of the lower mounting bracket, and further compression deformation can be prevented.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows an example of a liquid filled type vibration damping device according to the present invention.

(1) is a main body fitting having a cylindrical body (1a) having a vertical axis, which is disposed at an interval below the opening at the lower end side of the main body fitting (1). The lower mounting bracket (2) is connected to the lower mounting bracket (2) by a vibration-proof substrate (3) having a substantially inverted trapezoidal cross section made of a rubber elastic body interposed therebetween in a sealed state by vulcanization molding means.
(4) a diaphragm made of a rubber film attached in a sealing state to an upper opening of the main body fitting (1) opposite to the side on which the vibration isolating substrate is attached. These body fittings (1),
An inner chamber surrounded by the vibration isolation base (3) and the diaphragm (4) is divided into two upper and lower liquid chambers (7a) and (7b) by a partition member (6) having an orifice passage (5) on the outer periphery.
The two liquid chambers (7a) and (7b) are communicated by an orifice passage (5).

In the case of the figure, the diaphragm (4) has an annular reinforcing member (4a) embedded in the peripheral portion, and the embedded portion of the reinforcing member (4a) is a step (1b) of the main body (1).
And is fixed in a sealed state by caulking means described later.

The partition member (6) for forming the orifice passage (5) is formed of a metal cast or a rigid material integrally formed as shown in FIG. It may be formed by processing. In any case, a groove serving as an orifice passage (5) is provided on the outer peripheral portion, and a cylindrical rubber rubber layer (3a) integral with the vibration-proof base (3) is formed on the inner periphery of the main body (1). And the outer peripheral edge (6a) thereof is fixed together with the auxiliary fitting (4a) of the diaphragm (4) by caulking means described later. A communication hole (5) communicating with one of the liquid chambers (7a) partitioned from the groove portion.
a) and a communication hole (5b) communicating with the other liquid chamber (7b) are formed with a part of the groove closed.

(8) is an upper mounting bracket which is fixed to the opening on the upper end side of the main body mounting (1) and has a substantially bowl shape in which a bolt (9) for mounting the engine is protruded at the center. The upper mounting bracket (8) has an open end (8a).
Is caulked so as to hold the opening end (1c) of the main body fitting (1), the outer peripheral edge (6a) of the partition member and the auxiliary fitting (4a) of the diaphragm together, thereby holding them integrally. It is fixed. Thereby, an air chamber (10) is formed between the upper mounting member (8) and the diaphragm (3).

Further, a rubber portion integral with the vibration-proof base (3) is formed by projecting outwardly the opening edge (1d) of the body fitting (1) on the vibration-proof base attachment side at least on opposite sides. It is formed as a stopper portion (11) covered by (3b). The rubber part (3b) extends to the cylindrical body part (1a) of the main body fitting (1). The stopper portion (11) is formed by projecting the opening edge (1d) continuously or intermittently in the circumferential direction over substantially the entire circumference and forming a stopper portion over the entire circumference covered with the rubber portion (3b). It is also possible.

An annular stopper fitting is formed between the upper surface of the stopper part (11) and the outer peripheral surface of the cylindrical body part (1a) of the main body fitting (1) with a predetermined gap therebetween. (12) is arranged. This stopper bracket (1
2) is, for example, the stopper portions (1) on both sides facing each other.
The mounting legs (12a) (12a) extending from the both side edges opposed to each other in a direction perpendicular to the direction (1) and hanging from the lower mounting bracket (2) to members such as a hull or a frame or a bracket on the vehicle body side. Two or more (two in the figure) fastening portions (13) (13) are provided so as to be integrally fastened and fixed. That is, the stopper fitting (12)
Is separate from the main body of the vibration isolator and is fastened and fixed at the same time when it is attached to a vehicle body or the like, and can be easily replaced. (12b) is a protective fitting attached to the inner peripheral edge of the stopper fitting (12).

Although the upper surface of the stopper (11) is shown in FIG. 1 in contact with the stopper fitting (12), the stopper (11) is used in a use state where the load of the engine is received. A predetermined gap is kept away from the metal fitting (12).

(14) and (14) are stopper receiving portions provided by raising a part of the lower mounting bracket (2).
The stopper portion (11) is provided so as to come into contact with a large displacement downward to suppress further displacement, that is, compression of the vibration isolating base (3). Therefore, the main body fitting (1) and the vibration isolating base (2) are connected to the stopper portion (1).
1) is a stopper fitting (12) and a stopper receiving portion (14).
Up and down within the range of the distance.

In the case shown in the figure, a bolt (9) projecting from the upper mounting member (8) is inserted through a hole of the upper mounting member (8) by press-fitting means. In the case where the air chamber (10) is a closed chamber, the airtightness may be ensured by using a bonding means such as an adhesive in the press-fitting portion.

Also, the above-mentioned bolt (9) for mounting the engine.
A nut (15) having an outer peripheral threaded portion (9a) formed from the tip to a connection portion with the upper mounting bracket (8) to support a bracket on the engine side; and the upper mounting bracket (8). And a nut (16) for locking the bolt (9) to prevent loosening of the bolt (9).

With this configuration, by adjusting the screwing position of the nut with seat (15), the bracket on the engine side can be attached and supported at an arbitrary height. Also, a load such as a relatively large engine weight applied to the bolt (9) can be received by the upper mounting bracket (8) in which the nut (16) for preventing loosening is locked, and the bolt (9)
And looseness of the connecting portion between the upper mounting bracket (8) and rattling can be prevented.

The liquid filled type vibration damping device having the above structure is mainly used to support the engine of a small boat or automobile engine in a vibration-damping manner. At this time, the mounting legs (12a) and (12a) of the stopper fitting (12) are fixed together with the lower fitting (2) to the hull or the body side member at the fastening portions (13) and (13), Further, by adjusting the screwing position of the seat nut (15) with respect to the engine mounting bolt (9) protruding from the upper mounting bracket (8), the bracket on the engine side can be mounted and fixed at a predetermined height position. .

When the vibration of the supported engine or the like acts on the vibration isolator, the vibration isolating base (3) made of rubber elastic material is deformed, and the volumes of the upper and lower two liquid chambers (7a) and (7b) change. Accordingly, the liquid flows through the orifice passage (5), and the low frequency vibration is caused by the liquid flow effect by the vibration isolating base (3) and the orifice passage (5) and the vibration isolating effect of the vibration isolating base (3). Performs vibration damping and vibration isolation.

At the time of a large upward displacement, the stopper (11) integrated with the main body (1) comes into contact with the annular stopper (12) fixed to the lower mounting (2). When the main body fitting (1) is greatly displaced in the front-rear direction and the right and left directions, the outer peripheral rubber portion (3b) of the main body fitting (1) is connected to the stopper fitting (12). The displacement is further prevented by contacting the inner periphery, so that the stopper function is reliably and well performed, and the vibration-proof base (3) is not damaged.

[0027]

As described above, according to the liquid filled type vibration damping device of the present invention, the annular stopper fitting can be firmly fixed at two or more places, and can be brought into contact with the stopper portion over substantially the entire circumference thereof. It can sufficiently withstand a load (large displacement) load, and can exert a reliable and good stopper action against displacement in the vertical direction, the front-rear direction, and the direction perpendicular to the left and right axes, and can improve the durability of the vibration isolator.

Further, in the case of the present invention, it has sufficient strength to support an engine having a relatively large load, and can securely support the engine-side bracket at a predetermined position without loosening or backlash. Even if the anti-vibration base of the main body is broken, it is also effective in preventing the main body from falling off.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a liquid filled type vibration damping device according to one embodiment of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a longitudinal sectional view in a section perpendicular to FIG. 1;

FIG. 4 is a longitudinal sectional view showing an example of a conventional liquid-filled type vibration damping device.

[Explanation of symbols]

 (1) Main body bracket (2) Lower mounting bracket (3) Vibration isolation base (4) Diaphragm (5) Orifice (6) Partition member (7a) (7b) Two partitioned liquid chambers (8) Upper mounting bracket (9) Bolt for mounting the engine (11) Stopper (12) Stopper bracket (12a) Mounting leg (13) Fastening portion (15) Nut with seat (16) Nut for preventing loosening

Continued on the front page (72) Inventor Ikuo Takeuchi 1 Toyota Town, Toyota City, Aichi Prefecture Inside Toyota Motor Corporation (72) Inventor Teruo Sato 1 Toyota Town, Toyota City, Toyota City, Aichi Prefecture Inside Toyota Motor Corporation

Claims (2)

[Claims] An opening at the lower end of the main body and a lower mounting metal disposed below the lower end of the main body are connected by a vibration-proof base made of a rubber elastic body interposed therebetween. A liquid-filled vibration isolator in which a diaphragm made of a rubber film is attached, the inner chamber is partitioned by a partition member into two liquid chambers that communicate with each other through an orifice passage, and an upper mounting bracket is fixed to the upper part of the main body bracket. An apparatus, wherein a lower end side opening edge of a main body fitting is formed as a stopper by projecting outward at least on both sides facing each other, and a predetermined gap is provided between an upper surface of the stopper and an outer peripheral surface of the main body fitting. Arranging an annular stopper fitting, and attaching the stopper fitting,
At least two fastening portions to the vehicle body or the like in the lower mounting bracket are provided so as to be integrally fixable, and further, an engine mounting bolt protruding from the upper mounting bracket is provided with a seat nut for supporting a bracket on the engine side, A liquid filling type vibration damping device, comprising: a nut that locks to a mounting bracket to prevent loosening of the bolt. 2. The liquid-filled vibration damping device according to claim 1, wherein a part of the lower mounting member is formed as a stopper receiving portion that comes into contact with the stopper portion when the stopper portion is largely displaced downward.