JPH0626758Y2 - Partition member for liquid-sealed anti-vibration rubber device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention relates to a partition member used in a liquid-sealed anti-vibration rubber device.

2. Description of the Related Art In one type of liquid-sealing type anti-vibration rubber device, an internal liquid chamber is divided into a first liquid chamber and a second liquid chamber by a partition member, and a peripheral groove provided on the outer peripheral side of the partition member. The first liquid chamber and the second liquid chamber are made to communicate with each other via the, so that the first liquid chamber and the second liquid chamber are alternately flown in the circumferential groove from one to the other based on the flow resistance of the liquid. There is a type of damping relatively low frequency vibration. For example,
JP-A-61-45130, JP-A-62-8574
That is what is described in Japanese Patent Publication No. 1 and Japanese Utility Model Publication No. 62-136646.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, the partition member of such a conventional liquid-sealed anti-vibration rubber device is usually manufactured by cast molding using aluminum or the like, or a combination of a cast molded product and a press molded product. Therefore, it is difficult to avoid that the cost of the partition member becomes relatively high.

The present invention was made in the background of such circumstances.
An object of the invention is to provide a partition member for a liquid-sealing type anti-vibration rubber device which is more inexpensive than conventional ones.

Means for Solving the Problems In order to achieve the above object, the present invention provides an inner peripheral side wall portion,
A pair of outer peripheral side walls that are integrally provided on the outer peripheral side of the inner peripheral side wall and face each other in a direction parallel to the thickness direction of the inner peripheral side wall, and between the pair of outer peripheral side wall parts. And a peripheral groove that opens in the outer peripheral direction, and is provided so as to divide the liquid chamber in the liquid-sealing type rubber vibration isolator into a first liquid chamber and a second liquid chamber, and these are provided via the peripheral groove. A partition member for connecting the first liquid chamber and the second liquid chamber to each other, wherein a metal plate is subjected to a drawing process and a drawn portion of the metal plate is subjected to a reverse drawing process. Adjacent to the inner peripheral side wall part of the pair of outer peripheral side wall parts by using a bent part formed by bending a part of the inner peripheral side so as to substantially overlap in the plate thickness direction over the entire circumference. A part of one outer peripheral side wall that is connected to the outer peripheral side end of the bent part The other peripheral side wall portion constructed using, characterized in that it is press-formed from a single metal plate.

In the partition member for a liquid-sealing type anti-vibration rubber device having such a structure, the metal plate is subjected to a drawing process, and the drawn part of the metal plate is subjected to a reverse drawing process. Adjacent to the inner peripheral side wall part of the pair of outer peripheral side wall parts by using a bent part formed by bending a part of the inner peripheral side of the metal plate so as to substantially overlap in the plate thickness direction over the entire circumference. Since one outer peripheral side wall is formed, and the other outer peripheral side wall is formed by using a portion continuous to the outer peripheral side end of the bent portion, the partition member is press-formed from a single metal plate. The partition member can be composed only of press-molded products, and the mass productivity of the partition member can be improved, whereby the partition member can be provided at a lower cost as compared with the conventional case of having a cast-molded product. .

Embodiment Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

In FIG. 1, a liquid-sealed anti-vibration rubber device (hereinafter abbreviated as anti-vibration rubber device) 10 includes a first metal member 12 having a plate shape,
The first metal member 12 and the second metal member 14 are fixed to the first metal member 12 and the second metal member 14, respectively, so as to close the second metal member 14 having a cylindrical shape as a whole and one opening in the axial direction of the second metal member 14. A rubber elastic body 16 that connects the member 12 and the second metal member 14 to each other, and a container fixed to the other opening-side end of the second metal member 14 so as to close the other opening of the second metal member 14. Shaped third metal member 18
And in the metal ring 20 fixed to the outer peripheral side, the second
A rubber diaphragm 22 that is fixed between the metal member 14 and the third metal member 18 to form a liquid chamber with the rubber elastic body 16, and between the diaphragm 22 and the rubber elastic body 16. Second with diaphragm 22 at
By being fixed between the metal member 14 and the third metal member 18, the liquid chamber is divided into two parts, the first liquid chamber 24 and the second liquid chamber.
A partition member 28 forming a liquid chamber 26 is provided, and a predetermined liquid is sealed in the liquid chamber including the first liquid chamber 24 and the second liquid chamber 26.

The anti-vibration rubber device 10 is, for example, the first metal member 1
The engine 30 is elastically supported on the vehicle body by being fixed to the engine (not shown) by the bolts 30 projecting from No. 2 and being fixed to the vehicle body (not shown) by the bolts 32 projecting from the third metal member 18. Used for. Incidentally, 34 is a stopper member provided to prevent the rubber elastic body 16 from being deformed beyond a certain limit in a direction intersecting with the axial centers of the bolts 30 and 32. The stopper member 34 is the first metal member 12 Together with this, it is fixed integrally to the engine and the like.

The partition wall member 28 is press-molded from a single metal plate. As shown in FIGS. 1 and 2, the partition wall member 28 includes an inner peripheral side wall portion 36 and an outer peripheral edge of the inner peripheral side wall portion 36. It projects toward the outer peripheral side over the entire circumference and inclines toward the first metal member 12 toward the outer peripheral side, and at its protruding end is bent approximately 180 degrees toward the side opposite to the inner peripheral side wall portion 36 side. Overlap part 3 that overlaps with each other in the thickness direction
8 and the overlapping portion 38 from the outer peripheral side end portion to the outer peripheral side integrally, and inclines toward the outer peripheral side toward the diaphragm 22, and in the direction parallel to the plate thickness direction of the inner peripheral side wall portion 36. Facing part 40 facing the overlapping part 38
And a flange portion 42 that integrally protrudes from the tip of the facing portion 40 toward the outer peripheral side substantially parallel to the inner peripheral side wall portion 36, and is opened in the outer peripheral direction by the overlapping portion 38 and the facing portion 40. A circumferential groove 44 is formed. Therefore, in this embodiment, the overlapping portion 38 corresponds to one outer peripheral side wall portion, and the facing portion 40 corresponds to the other outer peripheral side wall portion. The partition wall member 28 is fixed in the flange portion 42 in a state of being sandwiched between the second metal member 14 and the third metal member 18, and the protruding end side of the overlapping portion 38 is on the inner peripheral surface of the rubber elastic body 16. By being brought into contact with each other, the circumferential groove 44
And the rubber elastic body 1 fixed to the inner peripheral surface of the second metal member 14.
A liquid passage 46 is formed by the thin wall portion 6 and the thin wall portion 6.
As shown in FIG. 2, a convex portion 48 is integrally provided in a part of the circumferential groove 44 in the circumferential direction so as to make the liquid passage 46 discontinuous in the circumferential direction. As shown in FIGS. 1 and 2, a notch 50 that opens in the projecting direction of the overlapping portion 38 is formed in the portion of the overlapping portion 38 located on the one end side of the liquid passage 46, and the facing portion is also formed. 40 liquid passages 4
As shown in FIG. 2, a through hole 52 is formed in the portion located on the other end side of 6. As a result, the liquids in the first liquid chamber 24 and the second liquid chamber 26 can flow through each other through the notches 50, the liquid passages 46, and the through holes 52, and the comparison in the vertical direction in FIG. Low frequency vibration,
The vibration is damped based on the flow resistance of the liquid flowing through the liquid passage 46.

As shown in FIG. 1, the inner peripheral side wall portion 36 of the partition wall member 28 has a through hole 54 formed in the central portion thereof and a large number of communication holes 56 formed around the through hole 54. A seal valve 58 made of, for example, a metal having rigidity is fixed in the through hole 54. The seal valve 58 includes a pair of disc-shaped portions 60, 60 arranged on both sides of the inner peripheral side wall portion 36 and each having an area capable of covering the large number of communication holes 56. Part 60,
60 are fixed to the inner peripheral side wall portion 36 by being connected through the through holes 54 at their central portions, and between the inner peripheral side wall portions 36 of both disc-shaped portions 60, 60. Each has a predetermined gap. As a result, when vibration of relatively low frequency and large amplitude is applied to the vibration isolating rubber device 10 in the vertical direction in FIG. 1, the communication hole 56 is covered by the disc-shaped portion 60 of the seal valve 58 to move. By preventing the spring constant from decreasing, the vibration damping effect of the liquid passage 46 is suitably secured, while when vibration of relatively high frequency and small amplitude is applied, the communication hole 56 causes the seal valve 5 to move.
The liquid in the first liquid chamber 24 and the second liquid chamber 26 is circulated through the communication hole 56 without being covered by 8, and the dynamic spring constant is lowered, so that high frequency vibration is suitably blocked. It is like this.

The partition member 28 is manufactured, for example, as follows. First, one metal plate is prepared, and the metal plate is subjected to a drawing process to obtain a hat-shaped first intermediate body 62 as shown in FIG. 3 (a). Next, by forming a taper portion that expands toward the opening side at a predetermined portion on the opening side of the peripheral wall of the first intermediate body 62, and at the same time, performing plastic working to project a part of the peripheral wall in the circumferential direction to the outer peripheral side, As shown in FIG. 3B, portions corresponding to the facing portion 40 and the convex portion 48 are respectively formed, and the second intermediate body 6 is formed.
Get 4. Next, by performing reverse drawing from the outer surface side (upper side in the drawing) on the bottom of the second intermediate body 64, the second intermediate body 64 in FIG.
As shown in (c), the portion of the peripheral wall located on the bottom side and the portion located on the outer peripheral side of the bottom portion are bent so as to be substantially overlapped in the plate thickness direction over the entire circumference. The part 66 is formed, and the third intermediate body 68 is obtained. Next, the bending portion 66 of the third intermediate body 68 is subjected to plastic working to open it to the outer peripheral side, so that the overlapping portion 38, the inner peripheral side wall portion 36, and the peripheral groove 44 are formed as shown in FIG. 3 (d). , And the convex portion 48 are respectively formed to obtain the fourth intermediate body 70. Then, the outer peripheral edge portion of the fourth intermediate body 70 is trimmed while leaving a portion corresponding to the flange portion 42, and the notch 50, the through holes 52, 54, and the communication hole 56 are formed, respectively, to form the partition member 28. To get

As described above, according to this embodiment, the metal plate is drawn in FIG. 3 (a), and the reverse drawing process is performed in FIG. 3 (c) on the drawn part of the metal plate. Thus, a bent portion 66 is formed by bending a part of the inner peripheral side of the metal plate so as to substantially overlap in the plate thickness direction over the entire circumference, and the bent portion 66 is formed in FIG. 3 (d). The outer peripheral side portion adjacent to the inner peripheral side wall portion 36 is constituted by the overlapping portion 38 formed by opening to the outer peripheral side, and the outer peripheral side end of the bent portion 66 formed in FIG. 3B is formed. The other outer peripheral side wall portion is formed by the facing portion 40 that is continuous with the portion, and the partition wall member 28 is press-molded from a single metal plate. Therefore, the partition wall member 28 can be formed only by a press-molded product and the partition wall member 28. Can improve the mass productivity of It is possible to provide a partition wall member 28 even more expensive than the conventional constituting Te.

Further, according to the present embodiment, since the convex portion 48 for making the liquid passage 46 discontinuous is formed simultaneously with the press molding of the partition member 28, a member corresponding to the convex portion 48 is separately provided in the circumferential groove 44. There is an advantage that it can be constructed at a lower cost than the case where it sticks to the.

In the above-described embodiment, the facing portion 40 is inclined so as to come closer to the diaphragm 22 from the outer peripheral side end of the overlapping portion 38 toward the outer peripheral side, but this is not always necessary. As shown, the overlapping portion 38
The facing portion 72 may protrude from the outer peripheral side end portion to the outer peripheral side substantially parallel to the inner peripheral side wall portion 36, or, as shown in FIG. 5, from the outer peripheral side end portion of the overlapping portion 38 to the inner peripheral side wall portion. The end portion protruding toward the diaphragm 22 side substantially at a right angle to the portion 36 may be the facing portion 74 protruding toward the outer peripheral side substantially parallel to the inner peripheral side wall portion 36.

Moreover, in the above-described embodiment, the overlapping portion 38 is formed by the inner peripheral side wall portion 3.
Although it is inclined at a predetermined angle with respect to 6, it is not absolutely necessary. For example, as shown in FIGS. 6 and 7, an overlapping portion 76 that is substantially parallel to the inner peripheral side wall portion 36 is formed, and the overlapping portion 76 is formed. In the portion 76, the facing portion 40 and the fifth portion similar to those in the above-described embodiment are provided.
You may make it provide the opposing part 74 similar to the case of the figure.

Further, in the above-described embodiment, the cutout 50 is formed in the overlapping portion 38, but a through hole may be formed instead of the cutout 50.

Further, in the above-described embodiment, one outer peripheral side wall portion is formed as the overlapping portion 38 that closely adheres in the plate thickness direction, but it is not always necessary and, for example, as shown in FIG. It may be the outer peripheral side wall portion 80 having the gap 78. In this case, the first liquid chamber 24
In order to make the liquid passage 46 communicate with the liquid passage 46, the outer peripheral side wall portion 80 is formed by crushing the projecting end portion toward the base side to form the recess 8
2 is formed.

Further, in the above-described embodiment, the convex portion 48 is integrally formed in the circumferential groove 44 of the partition member 28, but it is not always necessary. For example, another member corresponding to the convex portion 48 may be provided in the circumferential groove 44. It may be fixed, or the rubber elastic body 16 may be provided with a projecting portion that projects into the circumferential groove 44. Furthermore, the liquid passage may be continuous in the circumferential direction without providing such a convex portion 48 and the like. It may be configured.

Further, in the above-described embodiment, the inner peripheral side wall portion 3 of the partition member 28 is used.
Although a large number of communication holes 56 are formed in 6 and a seal valve 58 for opening and closing these communication holes 56 is provided, such communication holes 56 and seal valve 58 may not be provided. .

In addition, the present invention can be variously modified without departing from the spirit thereof.

[Brief description of drawings]

FIG. 1 is a front sectional view of a liquid-sealed anti-vibration rubber device including a partition member, which is an application example of the present invention. FIG. 2 is a perspective view of the partition member of FIG. 3 (a) to 3 (d) are views for explaining a method of manufacturing the partition member of FIG. FIGS. 4 to 8 are views showing another example of the present invention, each of which corresponds to a main part of the partition member of FIG. 10: Liquid-sealing type anti-vibration rubber device 24: First liquid chamber, 26: Second liquid chamber 28: Partition member 36: Inner peripheral side wall 38, 76: Overlap (one outer peripheral side wall) 40, 72, 74 : Opposing part (other outer peripheral side wall part) 44: peripheral groove, 66: bent part 80: outer peripheral side wall part (one outer peripheral side wall part)

Claims (1)

[Scope of utility model registration request] 1. An inner peripheral side wall portion, and a pair of outer peripheral side wall portions integrally provided on the outer peripheral side of the inner peripheral side wall portion and facing each other in a direction parallel to the thickness direction of the inner peripheral side wall portion. A peripheral groove that is provided between the pair of outer peripheral side wall portions and opens in the outer peripheral direction is provided, and the liquid chamber in the liquid-sealed anti-vibration rubber device includes a first liquid chamber and a second liquid chamber.
A partition member which is provided so as to be divided into two parts in the liquid chamber and which communicates the first liquid chamber and the second liquid chamber with each other through the circumferential groove, and which is formed by drawing a metal plate and By using a bent portion formed by performing reverse drawing on the drawn portion so that a part of the inner peripheral side of the metal plate is bent so as to substantially overlap in the plate thickness direction over the entire circumference. Of the pair of outer peripheral side walls, one outer peripheral side wall adjacent to the inner peripheral side wall is formed, and the other outer peripheral side wall is formed by using a part continuous to the outer peripheral side end of the bent part. And a partition wall member for a liquid-sealed anti-vibration rubber device, which is formed by press molding from a single metal plate.