JP2005221080A - Partitioning member for liquid filling type vibration isolation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve productivity of the partitioning member of a liquid filling type vibration isolation device. <P>SOLUTION: The partitioning member 1 of the liquid filling type vibration isolation device is provided with a ring fitment 2 having an orifice groove 7 formed in a peripheral edge part and the outer periphery side of which is released; and a rubber-like elastic film 3 closing the opening of the ring fitment 2 and formed such that a space surrounded with the orifice groove 7 and the inner peripheral surface of a liquid chamber is formed into an orifice 8. The ring fitment 2 is formed so that a first fitment 24 and a second fitment 25 are combined with each other and the first fitment 24 and the second fitment 25 are formed by press processing, and the two fitments are integrally formed by utilizing the rubber-like elastic film 3 to close its opening. This constitution can form the ring fitment 2 in a complicated shape having an orifice groove 7 for an orifice by simple processing. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a partition member for a liquid-filled vibration isolator used mainly for supporting a vibration generator such as an automobile engine.

  In general, a vibration generator such as an automobile engine is supported by a vibration isolator to control vibration transmitted from the engine or the like to the vehicle body side or the like. FIG. 6 shows an example of the vibration isolator. This anti-vibration device includes an outer cylinder fitting 101 attached to the vehicle body side, a boss fitting 102 attached to the engine side, and a rubber-like elasticity that is interposed between the outer cylinder fitting 101 and the boss fitting 102 to attenuate high-frequency vibrations. A body vibration-proof base 103 and a liquid chamber 104 filled with a liquid are provided.

  The liquid chamber 104 is divided into a main liquid chamber 108 and a sub liquid chamber 109 by a partition member 107 having a structure in which an opening of the ring-shaped metal fitting 105 is closed with a rubber-like elastic film 106. The main liquid chamber 108 and the sub liquid chamber 109 communicate with each other via an orifice 110 at the peripheral edge of the ring-shaped metal fitting 105, and the movement of the liquid between the main liquid chamber 108 and the sub liquid chamber 109 attenuates low frequency vibration. .

  By the way, as a partition member, a member made of an aluminum cast product or a synthetic resin molded product, or a member obtained by superimposing two metal plates and joining them together by spot welding or the like is known. In order to form an orifice groove or orifice opening that opens outward on the periphery, the mold structure (especially the die structure) is complicated in the case of castings and resin moldings, and after deburring after molding, etc. There is a difficulty that requires processing. On the other hand, when two metal plates are joined and integrated, a complicated mold such as a cast product is not required, and it can be easily formed by press molding, but there is a problem that a joining process such as spot welding is required. .

  In addition, in the case of a structure in which the partition member is provided with a rubber-like elastic film that attenuates high-frequency vibration, a process for further vulcanizing and bonding the rubber-like elastic film to the above-mentioned various molded products is required, which increases the production process and reduces the production cost. It was high. Therefore, the appearance of a partition member that can improve productivity has been desired.

  In view of the above problems, the present invention is based on the following measures in order to improve productivity while assuming a partition member formed by joining and integrating two metal plates that do not require complicated molds and deburring. Is adopted. That is, two ring-shaped metal fittings are overlapped in the axial direction to form a ring-shaped metal fitting, and at least one of the outer peripheral edges of the first metal fitting and the second metal fitting is bent, and an orifice is formed at both metal outer peripheral edges. If a groove is formed and the peripheral edge of the rubber-like elastic membrane is vulcanized and bonded to the overlap margin of the inner peripheral edge of the first metal fitting and the second metal fitting, both the metal fittings are integrated without using welding, etc. Can be omitted.

  In this case, if the inner peripheral edge of the first metal part is bent toward the second metal part to form an inner end rib, and the inner end rib is embedded in the peripheral part of the rubber elastic film, the peripheral edge of the rubber elastic film The first metal fitting and the second metal fitting can be firmly integrated by reinforcing the portion. That is, since the bonding area between the first metal fitting and the peripheral edge portion of the rubber-like elastic film is increased and the peripheral edge portion of the rubber-like elastic film is hardly deformed, both metal fittings can be prevented from being displaced in the axial direction. .

  Further, if a configuration having a gap between the peripheral edge of the rubber-like elastic membrane and the orifice entrance / exit of the orifice groove is adopted, the flow of the rubber-like elastic body when the peripheral edge of the rubber-like elastic membrane is vulcanized and bonded Thus, the orifice entrance / exit can be prevented from being blocked.

  As is apparent from the above description, according to the present invention, two metal fittings subjected to simple processing such as press working are overlapped to form a ring-like metal fitting, and these are elastic rubber films conventionally used. As a result of the integration, the productivity of the partition member, which increases the reliability of the function of the liquid-filled vibration isolator, can be improved, and the production equipment can be simplified, contributing to the rationalization of manufacturing and cost reduction. be able to.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a partition member of a liquid filled type vibration damping device according to the present invention will be described with reference to the drawings. FIG. 1 is a plan view of a partition member of a liquid-filled vibration isolator of the present invention, FIG. 2 is a cross-sectional view taken along the line AA, FIG. 3 is a view taken along arrow B, and FIG. It is a figure which shows arrangement | positioning of a partition member with sectional drawing.

  The partition member 1 of this liquid-filled vibration isolator comprises a steel ring-shaped metal fitting 2 having an opening in the center and a rubber-like elastic film 3 that closes the opening of the ring-shaped metal fitting 2. The liquid chamber 4 of the apparatus is inserted into the liquid chamber 4 so as to be divided into a main liquid chamber 5 and a sub liquid chamber 6, and is fixed by squeezing a cylindrical fitting 13 described later. In addition, an orifice groove 7 whose outer peripheral side is opened is formed at the peripheral edge of the ring-shaped metal fitting 2, and a space surrounded by the orifice groove 7 and the inner peripheral surface of the liquid chamber 4 is an orifice 8.

  The liquid chamber 4 of the vibration isolator is provided inside an outer tube fitting 9 attached to the vehicle body side and the like, and is disposed below a vibration isolating base 11 that supports a boss fitting 10 to which an engine or the like is attached. Among these, the upper side of the partition member 1 is a main liquid chamber 5, the lower side is a sub liquid chamber 6, and the inner peripheral surface is made of a rubber-like elastic body continuous with a vibration-proof base 11 made of a rubber-like elastic body. It is covered with the seal part 12 which becomes.

  The outer cylinder fitting 9 supports the vibration-proof base 11 and forms a cylindrical fitting 13 that forms the peripheral surface of the liquid chamber 4. A bracket cup 14 that restricts a large displacement toward the vehicle body, and a vehicle body side mounting bracket 15 that is externally fitted to the cylindrical metal fitting 13 and attached to the vehicle body side or the like. Outward flanges 16 and 17 are formed at the upper end portion of the cylindrical metal fitting 13 and the lower end portion of the bracket cup 14. The cylindrical metal fitting 13 and the bracket cup 14 are fixed by caulking. Further, the lower end portion of the vehicle body side mounting bracket 15 is bent inward.

  Of the seal portion 12 on the inner peripheral surface of the liquid chamber 4, a portion covering the inner peripheral surface of the main liquid chamber 5 protrudes inward from the seal portion 12 on the inner peripheral surface of the orifice 8, and a step 18 at the boundary thereof. Further, the upper surface of the orifice groove 7 of the partition member 1 is in contact. Further, a steel support ring 19 is fixed to the inside of the seal portion 12 on the inner peripheral surface of the auxiliary liquid chamber 6, and its upper end surface supports the lower surface of the orifice groove 7 in the axial direction. The position of the partition member 1 is not changed by sandwiching the orifice groove 7 between the twelve steps 18 and the support ring 19.

  An easily deformable diaphragm 20 is vulcanized and bonded to the inner peripheral surface of the support ring 19, and the lower surface side is closed so that the volume of the sub liquid chamber 6 can be changed. Further, the support ring 19 is fixed by a lower end portion 21 of the cylindrical metal fitting 13 whose diameter is reduced inward.

  One orifice inlet / outlet port 22 from the main liquid chamber 5 and the sub liquid chamber 6 to the orifice 8 is formed on each of the upper side surface and the lower side surface of the orifice groove 7 of the partition member 1. The main liquid chamber 5 and the sub liquid chamber 6 are communicated with each other by the orifice inlet / outlet 22 and the orifice 8, and when the vibration-proof base 11 is bent due to vibration, the volume of the main liquid chamber 5 is increased or decreased. Thus, the liquid moves between the main liquid chamber 5 and the sub liquid chamber 6.

  Further, the lower surface of the orifice groove 7 at a position sandwiched by the orifice inlet / outlet 22 is curved upward in an inverted U shape to form a blocking wall 23 that prevents the liquid from passing therethrough. However, the frictional force that attenuates the low-frequency vibration is increased. When the flow in the orifice 8 is blocked by high frequency vibration, the rubber-like elastic film 3 absorbs the pressure difference between the main liquid chamber 5 and the sub liquid chamber 6 to improve the ride comfort.

  The ring-shaped metal fitting 2 of the partition member 1 is configured by combining a first metal fitting 24 and a second metal fitting 25. Among these, the first metal fitting 24 is a substantially disc-shaped first metal fitting body 26 in which an orifice inlet / outlet 22a is formed, and the inner peripheral edge of the first metal fitting body 26 is bent downward (on the second metal fitting 25 side). The inner end rib 27 is formed by press working.

  The second metal fitting 25 has a substantially disk-shaped second metal fitting body 28 in which the orifice inlet / outlet 22b and the blocking wall 23 are formed, and the inner peripheral edge of the second metal fitting body 28 upward (on the first metal fitting 24 side). And a contact rib 30 formed by bending the upper end portion of the cylinder portion 29 inward in the radial direction, and is formed by pressing.

  The first metal fitting 24 and the second metal fitting 25 are arranged in the axial direction so that the contact rib 30 of the second metal fitting 25 fitted on the inner end rib 27 of the first metal fitting 25 abuts the first metal fitting body 26. The two are integrated by vulcanizing and bonding the peripheral edge of the rubber-like elastic film 3 to the overlap margin (inner peripheral edge). The first groove body 26 on the upper surface side, the second metal body 28 on the lower surface side, and the cylindrical portion 29 constitute the orifice groove 7.

  The rubber-like elastic film 3 includes a film part 31 that closes the opening of the ring-shaped metal fitting 2 and a ring-shaped leg 32 that protrudes downward at the peripheral edge of the film-like elastic film 3. The inner end rib 27 and the inner peripheral edge of the contact rib 30 of the second metal fitting 25 are covered and vulcanized and bonded. A ring-shaped gap 33 is provided between the ring-shaped leg 32 and the cylindrical portion 29 to prevent the orifice inlet / outlet 22b from being blocked by the flow of the rubber-like elastic body during vulcanization bonding.

  According to the above configuration, since the ring-shaped metal fitting 2 of the partition member 1 provided with the rubber-like elastic film 3 is configured by combining two metal fittings, the orifice can be obtained by applying a simple process such as pressing to the disk. The ring-shaped metal fitting 2 having a complicated shape having the orifice groove 7 for forming the groove 8 can be formed. Further, by using the rubber-like elastic film 3 that has been conventionally used, welding for integrating the two metal fittings becomes unnecessary.

  Further, by forming the inner end rib 27 on the first metal fitting 24, the area of adhesion with the rubber elastic film 3 is increased, and the ring leg 32 of the rubber elastic film 3 is reinforced so as to reduce deformation. Thus, the two metal fittings can be integrated more firmly. Further, since the orifice groove 7 is sandwiched between the step 18 of the seal portion 12 and the support ring 19, the change in the cross-sectional area of the orifice 8 can be prevented so that the two metal fittings are not separated.

  In addition, the overlap allowance of the 1st metal fitting 24 and the 2nd metal fitting 25 may be made into a shape like FIG. 5, for example. In FIG. 5, (a) is a stacking allowance in which inner end ribs 27 a and 27 b are formed on both metal fittings, and (b) is an abutment rib 30 of the second metal fitting 25 without forming inner end ribs. The overlap allowance just touching is shown.

  Further, the orifice groove 7 may not only bend the second metal fitting 25 to form the cylindrical portion 29 but also bend the first metal fitting 24 to form the cylindrical portion. You may form a cylinder part in both the two metal fittings 25. FIG. Further, the orifice groove 7 is not limited to a U-shaped cross section as in the above embodiment, but may be, for example, a triangular shape. Further, the blocking wall 23 may be formed not only by bending the second metal fitting 25 upward, but also by bending the first metal fitting 24 downward.

The top view of the partition member of the liquid enclosure type vibration isolator of this invention AA sectional view B arrow view The figure which shows arrangement | positioning of a partition member with the axial sectional view of a liquid enclosure type vibration isolator It is a figure which shows the overlap allowance of other embodiment, (a) is the overlap allowance which formed the inner end rib in both metal fittings, (b) is the overlap allowance which contact | abutted the 2nd metal fitting to the 1st metal fitting. Show Axial sectional view of a conventional liquid-filled vibration isolator

Explanation of symbols

1 Partition member
2 Ring-shaped bracket
3 Rubber-like elastic membrane
7 Orifice groove
8 Orifice
24 First bracket
25 Second bracket
27 Inner end rib
33 Ring-shaped gap

Claims (3)

A ring-shaped metal fitting having an orifice groove that is open on the outer peripheral side at the peripheral edge, and a rubber-like elastic membrane that closes the opening of the ring-shaped metal fitting, and a space surrounded by the orifice groove and the circumferential surface of the liquid chamber is an orifice. The ring-shaped metal fitting is formed by superimposing a ring-shaped first metal fitting and a ring-shaped second metal fitting in the axial direction, and the first metal fitting and the second metal fitting. At least one of the outer peripheral edge portions is bent to form the orifice groove at the outer peripheral edge portions of both metal fittings, and the peripheral edge portion of the rubber-like elastic film is added to the overlap margin of the inner peripheral edge portions of the first metal fitting and the second metal fitting. A partition member for a liquid filled type vibration damping device, wherein both metal fittings are integrated by sulfur bonding. 2. The liquid-filled type prevention according to claim 1, wherein the inner edge of the first metal part is bent toward the second metal part to form an inner end rib embedded in the peripheral part of the rubber-like elastic film. A partition member for a vibration device. A gap is provided between a peripheral edge of the rubber-like elastic membrane and an orifice entrance / exit of the orifice groove to prevent the orifice entrance / exit from being blocked by the flow of the rubber-like elastic body during vulcanization adhesion. Item 3. A partition member for a liquid-filled vibration isolator according to Item 1 or 2.

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