JP3974965B2 - Liquid seal mount - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a liquid ring mount, and more particularly to a liquid ring mount for attenuating vibrations of a vehicle or the like to reduce adverse effects due to vibrations on a mounted one including a vehicle body or the like.
[0002]
[Prior art]
Conventionally, as a liquid seal mount, an inner cylinder is positioned in an outer bracket, and a liquid chamber containing a liquid, for example, ethylene glycol or viscous silicone oil, is sealed by an elastic member between the outer bracket and the inner cylinder. And a partition member for dividing the liquid chamber into two in the radial direction of the inner cylinder is provided between the outer bracket and the inner cylinder, and between the two divided liquid chambers, that is, an upper liquid chamber and a lower liquid chamber There is known a structure in which an orifice is provided in a partition member between the two and communicated with each other.
The elastic member is displaced by the axial vibration and load applied to the liquid seal mount, but the liquid flows through an orifice communicating between the upper and lower liquid chambers so that the displacement is the same amount. Both vibrations in the frequency range and the high frequency range are damped.
[0003]
At this time, in order to cope with the case where the vibration and load in the axial direction with respect to the liquid seal mount are larger, a part of the elastic member is made thin to form a diaphragm structure, in order to avoid damage due to deformation exceeding the allowable amount of the diaphragm. A separate stopper was provided.
[0004]
[Problems to be solved by the invention]
The liquid-sealed mount responds well to vibrations and loads from the axial direction from large to small, and both low-frequency and high-frequency vibrations are attenuated.
However, since the diaphragm and the stopper are separate, there is a problem that the number of parts is large and the number of assembly steps is also large, and a pipe is provided on a partition member whose orifice is made of rubber or the like. Therefore, stress concentrates on the partition member near the pipe, and the portion is easily cracked, and there is a risk of lack of durability. Further, in order to improve this point, even when a resin orifice plate is used, the lower elastic member such as rubber is likely to crack, and there is a risk of lack of durability.
[0005]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a durable liquid-sealed mount by reducing the number of parts and reducing the number of assembling steps, thereby facilitating the manufacture and improving the position of the orifice.
[0006]
[Means for Solving the Problems]
The present invention has been proposed in order to achieve the above object, and is characterized by having the following configuration.
That is, according to the present invention, the inner cylinder is positioned in the outer bracket, and a liquid chamber is defined by liquid-sealing between the outer bracket and the inner cylinder with an elastic member, and the liquid chamber is defined as the inner cylinder. In the liquid seal mount in which a partition member that is divided in the axial direction is provided between the outer bracket and the inner cylinder and the divided liquid chambers are communicated with each other through an orifice, the outer periphery of the inner cylinder is an upper part thereof There is a step consisting of a small-diameter part, a medium-diameter part, and a large-diameter part from the bottom to the bottom, and a cylindrical body with a stopper that is integrated with the diaphragm is fitted around the small-diameter part by vulcanization. The partition member is fitted to the outer periphery of the medium diameter portion , and the elastic member configured integrally with the diaphragm and the stopper is fitted to the outer periphery of the large diameter portion by vulcanization adhesion. A liquid seal characterized by Und is provided.
By configuring the liquid seal mount in this way, the displacement of the elastic member caused by vibration and load from the axial direction is accommodated in the liquid chamber divided in the axial direction by the partition member so that the displacement is equal. The liquid is moved through the orifice to dampen both low and high frequency vibrations, and for high vibrations and high loads, the diaphragm responds to the large amount of liquid that has passed through the orifice. In addition, the stopper acts and cushions against deformation exceeding the permissible amount of the diaphragm to prevent the diaphragm from being damaged. Further, the diaphragm and the stopper are formed as an elastic member to reduce the number of parts and the number of assembly steps. succeeded in.
In the present invention, the axial direction means that the liquid chamber is divided by a partition member above and below the inner cylinder as an axis, and therefore the partition member is arranged in a direction perpendicular to the axis.
In addition, the outer periphery of the inner cylinder is formed in steps consisting of a small diameter part, a medium diameter part, and a large diameter part from the upper part to the lower part, and a stopper integrated with the diaphragm is provided around the outer periphery of the small diameter part. A cylindrical body is fitted by vulcanization adhesion, the partition member is fitted to the outer periphery of the medium diameter portion , and the elastic member configured integrally with the diaphragm and the stopper is attached to the outer periphery of the large diameter portion. Since the partition member is fitted by vulcanization adhesion , the partition member can support the inner cylinder in a state of being vulcanized and adhered to the outer periphery of the medium diameter portion and the upper surface of the large diameter portion.
[0007]
Moreover, according to this invention, the said liquid seal mount which comprised the said orifice by the groove | channel provided in either one of an outer bracket side and an inner cylinder side is provided.
According to this, since the orifice is formed by a groove, stress is not concentrated on the partition member, and there is a feature that a crack does not occur.
[0008]
Moreover, according to this invention, the said liquid seal mount which comprised the said orifice by the groove | channel provided in both the outer bracket side and the inner cylinder side is provided.
Also in this case, since the orifice is formed by both grooves, stress is not concentrated on the partition member, and there is a feature that a crack does not occur.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a sectional view of a liquid seal mount showing an embodiment of the present invention. In the figure, a liquid seal mount 1 has an inner cylinder 3 positioned in an outer bracket 2, and a liquid chamber 5 is defined by sealing the outer bracket 2 and the inner cylinder 3 with an elastic member 4. A partition member 6 that divides the liquid chamber 5 in the axial direction of the inner cylinder 3 is provided between the outer bracket 2 and the inner cylinder 3, and the divided liquid chamber 5, that is, between the upper liquid chamber 5a and the lower liquid chamber 5b. An orifice 7 communicates with the elastic member 4 and a diaphragm 8 and a stopper 9 are integrally formed.
[0010]
As shown in FIG. 2, the outer bracket 2 has its upper end portion 10 widened, showing the state before caulking, its lower end portion 11 is also widened like a bowl, has a bolt hole 12 at its outer edge, and a bolt 13 is passed through it. It can be attached to a support member (not shown). Further, the space between the upper end portion 10 and the lower end portion 11 is narrowed to form a cylindrical portion 14, and a step 15 is provided on the inner peripheral surface thereof. This step 15 is for supporting the partition member 6 described in detail later. belongs to.
[0011]
As shown in FIG. 3, the cylinder 3 has steps 20 and 21 from the upper part to the lower part, and gradually increases in diameter to form a small diameter part 22, a medium diameter part 23, and a large diameter part 24. The elastic member 4 composed of an upper elastic member 25 and a lower elastic member 26 is interposed between the cylinder 3 and the outer bracket 2 in a liquid-sealed state, thereby defining the liquid chamber 5. That is, the lower elastic member 26 and the boundary between the cylindrical portion 14 and the lower end portion 11 of the outer bracket 2 are vulcanized and bonded, and similarly, the lower elastic member 26 and the large-diameter portion 24 of the cylinder 3 are also vulcanized and bonded to form a liquid-sealed state. Thus, the cylinder 3 is supported.
[0012]
Further, as shown in FIG. 4, the upper elastic member 25 is a cylinder fitted into the trumpet body 30 along the curved portion at the boundary between the cylindrical portion 14 and the upper end portion 10 of the outer bracket 2 and the small diameter portion 22 of the cylinder 3. The rubber member 32 is vulcanized and bonded to the trumpet body 30 and the cylindrical body 31 to form a liquid-sealed state, and supports the cylinder 3 like the lower elastic member 26. . In the rubber member 32, the thin part near the trumpet body 30 is the above-described diaphragm 8, and the thick part near the trumpet body 30 is the above-described stopper 9, which are integrally formed.
[0013]
Therefore, when a certain load or more is applied to the diaphragm 8, no further load is applied by the stopper 9, so that the diaphragm 8 does not puncture even if it is thin. Moreover, since the diaphragm 8 and the stopper 9 are integrally formed, it is natural that the number of parts and the number of assembling steps can be reduced as compared with the case where they are separate.
[0014]
A liquid 33 such as ethylene glycol or viscous silicone oil is accommodated in the liquid chamber 5 which is in a liquid-sealed state by the elastic member 4 composed of the upper elastic member 25 and the lower elastic member 26. The liquid chamber 5 is divided into an upper liquid chamber 5a and a lower liquid chamber 5b by the partition member 6 that is divided in the axial direction of the inner cylinder 3 as described above.
[0015]
The partition member 6 includes a ring body 34 that fits on the inner peripheral surface of the cylindrical portion 14 of the outer bracket 2, and a ring body 35 that fits on the inner diameter portion 23 of the inner cylinder 3. A ring-shaped rubber member 36 is vulcanized and bonded to each other and 35 in a liquid-sealed state. A plurality of grooves 37 longer than the axial length of the ring body 35 are provided in the inner diameter portion 23 of the inner cylinder 3, and the ring body 35 of the partition member 6 is fitted to the inner diameter portion 23. The above-described orifice 7 is formed. The shape of the groove 37 is not particularly limited as long as it functions as an orifice. For example, the shapes shown in FIGS. 3A, 3B, and 3C are exemplified. The
[0016]
The orifice 7 moves the liquid 33 divided and stored in the upper liquid chamber 5a and the lower liquid chamber 5b so that the displacement of the elastic member 4 caused by the vibration and load from the axial direction of the inner cylinder 3 becomes the same amount. Both the low-frequency and high-frequency vibrations are damped. Since the orifice 7 is constituted by the groove 37 of the inner diameter portion 23 of the inner cylinder 3 and the inner surface of the ring body 35 of the partition member 6, stress is not concentrated on the ring-shaped rubber member 36, and the ring-shaped rubber member 36. There is no such thing as causing cracks. The groove 37 may be provided in the ring body 35.
[0017]
Next, a manufacturing method of the liquid ring mount 1 having the above-described configuration and a usage state thereof will be described. First, the large-diameter portion 24 of the inner cylinder 3 is fitted to the lower elastic member 26 of the elastic member 4, and in this state, the lower elastic member 26 is applied to the boundary between the cylindrical portion 14 and the lower end portion 11 of the outer bracket 2 and vulcanized and bonded. Then, the state shown in FIG. 2 is obtained. Next, the ring body 35 of the partition member 6 of FIG. 5 is fitted to the middle diameter portion 23 of the cylinder 3 in the state of FIG. 2, and the ring body 34 is fitted to the inner peripheral surface of the circumferential portion 14 of the outer bracket 2, The partition member 6 is strongly supported by the step 15. Then, the cylindrical body 31 of the upper elastic member 25 is fitted to the small diameter portion 22 of the inner cylinder 3, and the trumpet body 30 is fitted to the boundary between the cylindrical portion 14 and the upper end portion 10 of the outer bracket 2. The upper elastic member 25 is strongly supported by the step 20, and the upper elastic member 25 is liquid-sealed by crimping the end of the upper end portion 10 of the outer bracket 2, whereby the liquid-sealing mount 1 of the liquid-sealing mount 1 is filled. Finish production.
[0018]
The liquid seal mount 1 is used by first passing a bolt 13 through a bolt hole 12 in the upper end portion 10 of the outer bracket 2 and supporting it on a support member such as a vehicle, and the like in the inner cylinder 3 (not shown). To support. Then, when the vehicle is run in this state, the upper liquid chamber 5a and the lower liquid chamber 5b are divided so that the displacement of the elastic member 4 caused by the vibration and load from the axial direction of the liquid seal mount 1 is equal. The contained liquid 33 moves through the orifice 7 to attenuate both the low-frequency and high-frequency vibrations. However, high vibration and high load are dealt with by passing more liquid 33 through the orifice 7 from the lower liquid chamber 5b to the upper liquid chamber 5a and inflating the diaphragm 8 of the upper elastic member 25 . The expansion beyond the allowable amount of the diaphragm 8 is buffered to the upper elastic member 25 together with the diaphragm 8 together with the stopper 9, so that the diaphragm 8 can be prevented from being damaged.
[0019]
FIG. 6 shows a liquid seal mount 1a showing another embodiment of the present invention. The difference from the embodiment shown in FIGS. 1 to 5 is that the position of the orifice 7a is provided on the outer bracket 2 side. It is in. That is, the orifice 7 a is formed by providing a plurality of grooves 40 in the ring body 34 that fits into the cylindrical portion 14 on the outer bracket 2 side of the partition member 6, and the ring body 34 is fitted into the cylindrical portion 14. Is done. The groove 40 may be provided in the outer bracket 2. Since other configurations and operations are the same as those of the embodiment shown in FIGS. 1 to 5, the reference numerals are attached to the drawings and the description thereof is omitted. 6 indicates a trumpet body, and this trumpet body 41 is for attaching the lower elastic body 26 to the outer bracket 2 as in the case of the upper elastic body 25.
[0020]
The embodiment of the present invention has been described above, but the specific configuration is not limited thereto, and appropriate modifications / additions or other combinations in each claim may be made without departing from the gist of the present invention. Of course, such a configuration is also included.
[0021]
【The invention's effect】
As described in detail above, according to the first aspect of the present invention, each of the liquid chambers divided in the axial direction by the partition member is provided so that the displacement of the elastic member caused by the vibration and load from the axial direction becomes the same amount. The contained liquid is moved through the orifice to dampen both low and high frequency vibrations, and for high vibrations and high loads, the diaphragm deforms the large amount of liquid that has passed through the orifice. The stopper acts and cushions against deformation that exceeds the allowable amount of the diaphragm to prevent the diaphragm from being damaged, and the diaphragm and the stopper are formed as an elastic member integrally to reduce the number of parts and the assembly man-hours. It became possible to reduce it. Therefore, it is possible to effectively attenuate both the low-frequency and high-frequency vibrations, alleviate the vibrations of devices including people mounted on vehicles and the like, and facilitate the production as a whole.
[0022]
According to the invention of claim 2, since the orifice is formed by the groove, the stress is not concentrated on the partition member, and the crack does not occur. Accordingly, the durability is improved as a whole.
[0023]
According to the invention of claim 3, since the orifice is formed by both grooves, stress is not concentrated on the partition member, and no crack is generated. Accordingly, in this case as well, the durability is improved as a whole.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a liquid seal mount showing an embodiment of the present invention.
FIG. 2 is a cross-sectional view of a main part constituting a liquid seal mount.
FIG. 3 is a cross-sectional view showing an upper elastic body.
FIG. 4 is a perspective view showing a cylinder.
FIG. 5 is a cross-sectional view showing a partition member.
FIG. 6 is a cross-sectional view of a liquid seal mount showing another embodiment of the present invention.
[Explanation of symbols]
1, 1a Liquid seal mount 2 Outer bracket 3 Inner cylinder 4 Elastic member 5 Liquid chamber 5a Upper liquid chamber 5b Lower liquid chamber 6 Partition member 7, 7a Orifice 8 Diaphragm 9 Stopper 10 Upper end 11 Lower end 12 Bolt hole 13 Bolt 14 Cylindrical Parts 15, 20, 21 Step 22 Small diameter part 23 Medium diameter part 24 Large diameter part 25 Upper elastic body 26 Lower elastic body 30, 41 Trumpet body 31 Cylindrical body 32 Rubber member 33 Liquid 34, 35 Ring body 36 Ring-shaped rubber member 37 40 grooves

Claims (3)

A partition member that positions the inner cylinder in the outer bracket, seals between the outer bracket and the inner cylinder with an elastic member to define a liquid chamber, and divides the liquid chamber in the axial direction of the inner cylinder In the liquid seal mount in which the liquid chamber is provided between the outer bracket and the inner cylinder and the divided liquid chambers are communicated with each other by an orifice. A cylindrical body with a stopper formed integrally with the diaphragm is fitted by vulcanization adhesion to the outer periphery of the small-diameter portion , and has a step composed of a diameter portion and a large-diameter portion. The liquid seal mount, wherein the partition member is fitted, and the elastic member integrally formed with the diaphragm and the stopper is fitted to the outer periphery of the large diameter portion by vulcanization adhesion .   The liquid seal mount according to claim 1, wherein the orifice is constituted by a groove provided on either the outer bracket side or the inner cylinder side.   The liquid seal mount according to claim 1, wherein the orifice is constituted by a groove provided on both the outer bracket side and the inner cylinder side.

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