JP2017044221A - Vibration control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress high resilience when vibrations are inputted.SOLUTION: A vibration control device 10 includes: an outer attaching member 11 and an inner attaching member 12; a first elastic body 13 which couples the outer attaching member 11 and the inner attaching member 12; a diaphragm 15 which couples the outer attaching member 11 and the inner attaching member 12, and defines a liquid chamber 28 between the first elastic body 13 and the diaphragm 15; a partitioning member 16 which couples the outer attaching member 11 and the inner attaching member 12, and divides the liquid chamber 28 into a first liquid chamber 29 using the first elastic body 13 as a part of a partition wall, and an auxiliary liquid chamber 30 using the diaphragm 15 as a part of a partition wall; a second elastic body 14 which couples the outer attaching member 11 and the inner attaching member 12, and defines a second liquid chamber 34 between the first elastic body 13 and the second elastic body 14; and a first limit passage 17 communicating the first liquid chamber 29 and the auxiliary liquid chamber 30, and a second limit passage 18 communicating the second liquid chamber 34 and the auxiliary liquid chamber 30. The partitioning member 16 elastically couples the outer attaching member 11 and the inner attaching member 12.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vibration isolator.

Conventionally, for example, a vibration isolator described in Patent Document 1 below is known. The vibration isolator connects the cylindrical outer mounting member, the inner mounting member disposed inside the outer mounting member, the outer mounting member and the inner mounting member, and an axis along the central axis of the outer mounting member. A pair of main body rubbers, an outer mounting member, and an inner mounting member that are spaced apart in the direction are connected to each other, and a liquid chamber between the pair of main body rubbers is connected to the first liquid chamber and the second liquid chamber in the axial direction. And a partition member for partitioning. The partition member includes an annular rigid body portion formed with a restricting passage communicating the first liquid chamber and the second liquid chamber, an annular elastic portion connected to the rigid body portion in a radial direction intersecting the central axis, and It has.
In this vibration isolator, when the vibration is input, the liquid moves between the first liquid chamber and the second liquid chamber through the restriction passage, so that the input vibration is attenuated and absorbed.

JP 2011-196453 A

  However, the conventional vibration isolator has a problem that a high spring is likely to occur when vibration is input.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to suppress an increase in springs when vibration is input.

In order to solve the above problems, the present invention proposes the following means.
A vibration isolator according to the present invention is a cylindrical outer mounting member connected to one of a vibration generating portion and a vibration receiving portion, and is connected to the other and disposed inside the outer mounting member. An inner mounting member, a first elastic body that connects the outer mounting member and the inner mounting member, the outer mounting member and the inner mounting member are connected, and the outer mounting member is connected to the outer mounting member from the first elastic body. A diaphragm which is disposed apart on one side in the axial direction along the central axis and defines a liquid chamber with the first elastic body, and connects the outer mounting member and the inner mounting member, and the liquid A partition member that divides the chamber into a first liquid chamber having the first elastic body as a part of the partition, and a sub liquid chamber having the diaphragm as a part of the partition, the outer mounting member and the inner mounting part And a second elastic body which is disposed away from the first elastic body on the other side in the axial direction and defines a second liquid chamber between the first elastic body and the first elastic body. A first restriction passage communicating the liquid chamber and the sub liquid chamber, and a second restriction passage communicating the second liquid chamber and the sub liquid chamber, and the partition member includes the outer mounting member The inner mounting member is elastically connected.

In this case, when vibration is input, the first elastic body, the partition member, and the second elastic body are elastically deformed, and the liquid pressures in the first liquid chamber and the second liquid chamber tend to change. At this time, the liquid moves between the first liquid chamber and the sub liquid chamber through the first restricting passage, and also flows between the second liquid chamber and the sub liquid chamber through the second restricting passage, and vibration is generated. Attenuated and absorbed. Accordingly, it is possible to absorb the fluid pressure fluctuations generated in the first liquid chamber and the second liquid chamber at the time of vibration input by the expansion and contraction of the sub liquid chamber accompanying the deformation of the diaphragm, and the high spring at the time of vibration input. Can be suppressed.
In addition, when the vibration is input, the liquid flows through the first restriction passage and the second restriction passage. Therefore, for example, if the resonance frequencies of the first restriction passage and the second restriction passage are equalized, high damping performance can be exhibited with respect to vibration of a specific frequency (a frequency equivalent to the resonance frequency). On the other hand, for example, if the resonance frequencies of the first restriction passage and the second restriction passage are made different, it is possible to exhibit a damping performance against vibrations of a wide range of frequencies.

  The second liquid chamber is divided into two divided liquid chambers around the central axis, the two second restriction passages are provided, and the two divided liquid chambers and the sub liquid chamber communicate with each other. It may be.

  In this case, when the vibration in the radial direction intersecting the central axis is input to the vibration isolator, the two divided liquid chambers are expanded and contracted, and the liquid is transferred between the two divided liquid chambers and the sub liquid chamber. It can be made to go and go through each of the two second restricted passages. Thereby, it is possible to effectively exhibit the damping performance against the vibration in the radial direction.

  The partition member includes an annular outer rigid body connected to the outer mounting member, an annular inner rigid body connected to the inner mounting member, and an annular connecting the outer rigid body and the inner rigid body. And an elastic part.

  In this case, the elastic part connects the outer rigid part and the inner rigid part. Therefore, for example, when the partition member is assembled to the outer mounting member and the inner mounting member, it is possible to facilitate the assembly by deforming the elastic portion, and it is possible to improve the assemblability.

  According to the present invention, it is possible to suppress an increase in spring when vibration is input.

It is a longitudinal cross-sectional view of the vibration isolator which concerns on one Embodiment of this invention. It is an II-II cross-sectional arrow view shown in FIG. It is a schematic diagram of the vibration isolator shown in FIG.

Hereinafter, a vibration isolator 10 according to an embodiment of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 to 3, the vibration isolator 10 is a so-called liquid enclosure type in which a liquid L (for example, ethylene glycol, water, silicone oil, etc.) is enclosed. The vibration isolator 10 is a so-called differential pressure type and can be suitably applied to, for example, a cabin mount.

  The vibration isolator 10 includes an outer mounting member 11, an inner mounting member 12, a pair of elastic bodies 13, 14, a diaphragm 15, a partition member 16, a first restriction passage 17, a second restriction passage 18, It has. The vibration isolator 10 is disposed between a vibration generating unit and a vibration receiving unit (not shown), and an outer mounting member 11 is connected to one of the vibration generating unit and the vibration receiving unit, and an inner mounting member. 12 is connected to one of the vibration generating unit and the vibration receiving unit.

  The outer attachment member 11 is formed in a cylindrical shape (cylindrical shape). Hereinafter, a direction along the central axis O of the outer mounting member 11 is referred to as an axial direction, a direction orthogonal to the central axis O is referred to as a radial direction, and a direction around the central axis O is referred to as a circumferential direction.

  The outer mounting member 11 is formed in a multistage (two-stage) cylindrical shape in which a small diameter portion 21 and a large diameter portion 22 are connected in the axial direction. Hereinafter, the small diameter portion 21 side along the axial direction is referred to as one side, and the large diameter portion 22 side is referred to as the other side.

  The inner mounting member 12 is disposed inside the outer mounting member 11. The inner mounting member 12 is formed in a cylindrical shape (cylindrical shape) extending in the axial direction, and is disposed coaxially with the outer mounting member 11. One end of the inner mounting member 12 is disposed at the same axial position as one end of the outer mounting member 11, and the other end of the inner mounting member 12 extends from the outer mounting member 11. Projects to the other side.

  The pair of elastic bodies 13 and 14, the diaphragm 15, and the partition member 16 connect the outer mounting member 11 and the inner mounting member 12. The pair of elastic bodies 13 and 14, the diaphragm 15, and the partition member 16 are formed in an annular shape (annular shape) coaxial with the outer mounting member 11. The outer peripheral edge portions of the pair of elastic bodies 13, 14, the diaphragm 15 and the partition member 16 are connected to the outer mounting member 11, and the inner peripheral edge portions of the pair of elastic bodies 13, 14, the diaphragm 15 and the partition member 16 are mounted on the inner side. It is connected to the member 12.

  The pair of elastic bodies 13, 14 are arranged at an interval in the axial direction, and the partition member 16 is disposed on the one side from the first elastic body 13 located on one side of the pair of elastic bodies 13, 14. Are located apart. The second elastic body 14 located on the other side of the pair of elastic bodies 13 and 14 is disposed away from the first elastic body 13 on the other side. The diaphragm 15 is formed thinner than each of the pair of elastic bodies 13 and 14 and is disposed away from the partition member 16 on one side. The pair of elastic bodies 13, 14, the diaphragm 15, and the partition member 16 are arranged in order of the diaphragm 15, the partition member 16, the first elastic body 13, and the second elastic body 14 from one side to the other side.

  The diaphragm 15 connects the end portions on one side of each of the outer mounting member 11 and the inner mounting member 12. The outer peripheral edge of the diaphragm 15 is directly connected (vulcanized and bonded) to the inner peripheral surface of the outer mounting member 11, and the inner peripheral edge of the diaphragm 15 is connected to the outer peripheral surface of the inner mounting member 12 via the first intermediate cylinder 23. Are connected. The first intermediate cylinder 23 is fitted to the inner mounting member 12 from the radially outer side, and the inner peripheral edge of the diaphragm 15 is vulcanized and bonded to the outer peripheral surface of the first intermediate cylinder 23.

  The pair of elastic bodies 13 and 14 elastically connect the other ends of the outer mounting member 11 and the inner mounting member 12 to each other. The outer peripheral edge portions of the pair of elastic bodies 13, 14 are connected to the inner peripheral surface of the outer mounting member 11 via the second intermediate cylinder 24, and the inner peripheral edge portions of the pair of elastic bodies 13, 14 are attached to the inner side. It is directly connected (vulcanized and bonded) to the outer peripheral surface of the member 12.

  The second intermediate cylinder 24 is fitted to the outer mounting member 11 from the inside in the radial direction, and the outer peripheral edge portions of the pair of elastic bodies 13 and 14 are vulcanized and bonded to the inner peripheral surface of the second intermediate cylinder 24. Has been. In the illustrated example, the second intermediate cylinder 24 has a small cylinder part 25 to which the first elastic body 13 is connected and a large cylinder part 26 to which the second elastic body 14 is connected from one side to the other side. It is formed in a multi-stage (two-stage) cylindrical shape connected in this order. An annular flow path member 27 is fitted between the small tube portion 25 and the outer mounting member 11.

  Between the first elastic body 13 and the diaphragm 15, a liquid chamber 28 in which the liquid L is sealed is provided. The liquid chamber 28 is provided in a portion located between the first elastic body 13 and the diaphragm 15 in the inside of the outer mounting member 11.

  The partition member 16 is sandwiched between the first elastic body 13 and the diaphragm 15 in the axial direction. The partition member 16 includes a liquid chamber 28, a first liquid chamber 29 (first main liquid chamber) having the first elastic body 13 as a part of the partition wall, and a secondary liquid chamber 30 having the diaphragm 15 as a part of the partition wall. Partition. The first liquid chamber 29 is disposed on the other side of the partition member 16, and the sub liquid chamber 30 is disposed on one side of the partition member 16.

  The partition member 16 elastically connects the outer mounting member 11 and the inner mounting member 12. The partition member 16 includes an outer rigid part 31, an inner rigid part 32, and an elastic part 33. The outer rigid body part 31, the inner rigid body part 32, and the elastic part 33 are all formed in an annular shape (annular shape).

  The outer rigid body portion 31 is coupled to the outer mounting member 11, and the inner rigid body portion 32 is coupled to the inner mounting member 12. The outer rigid body portion 31 is fitted to the outer mounting member 11 from the inside in the radial direction, and the inner rigid body portion 32 is fitted to the inner mounting member 12 from the outside in the radial direction. The elastic part 33 connects the outer rigid part 31 and the inner rigid part 32.

  Between the 1st elastic body 13 and the 2nd elastic body 14, the 2nd liquid chamber 34 (2nd main liquid chamber) in which the liquid L was enclosed is formed. The second liquid chamber 34 is provided in a portion located between the first elastic body 13 and the second elastic body 14 in the inside of the outer mounting member 11.

  The second liquid chamber 34 is partitioned into two divided liquid chambers 35 in the circumferential direction (around the central axis O). An elastic wall 36 that partitions the second liquid chamber 34 is provided in the second liquid chamber 34. The elastic wall 36 is provided between the first elastic body 13 and the second elastic body 14 in the axial direction. A pair of elastic walls 36 are arranged at intervals in the circumferential direction. In the illustrated example, the pair of elastic walls 36 are arranged on the same straight line in a plan view when viewed from the axial direction, and divides the second liquid chamber 34 into two divided liquid chambers 35 in two equal parts.

  The first restriction passage 17 communicates the first liquid chamber 29 and the sub liquid chamber 30, and the second restriction passage 18 communicates the second liquid chamber 34 and the sub liquid chamber 30. The first restricting passage 17 is provided in one of the outer rigid portion 31 and the inner rigid portion 32, and the second restricting passage 18 is provided in either the outer rigid portion 31 and the inner rigid portion 32. In the present embodiment, the first restriction passage 17 is provided in the inner rigid body portion 32, and the second restriction passage 18 is provided in the outer rigid body portion 31.

  The first restriction passage 17 is limited to the inner rigid body portion 32, and only one is provided. The second restriction passage 18 is formed across the outer rigid body portion 31 and the flow path member 27. Two second restriction passages 18 are provided, and the two divided liquid chambers 35 and the auxiliary liquid chamber 30 are communicated with each other.

  As described above, according to the vibration isolator 10 according to the present embodiment, for example, when axial vibration is input, the pair of elastic bodies 13 and 14 and the partition member 16 are elastically deformed in the axial direction, The fluid pressures in the first fluid chamber 29 and the second fluid chamber 34 tend to vary. At this time, the liquid L moves between the first liquid chamber 29 and the sub liquid chamber 30 through the first restricting passage 17, and between the second liquid chamber 34 and the sub liquid chamber 30, the second restricting passage. The vibration is attenuated and absorbed. Accordingly, it is possible to absorb the fluctuations in the hydraulic pressure generated in the first liquid chamber 29 and the second liquid chamber 34 when the vibration is input, by the expansion / contraction of the sub liquid chamber 30 accompanied by the deformation of the diaphragm 15. It is possible to suppress high springs at times.

  In addition, when the vibration is input, the liquid L flows through the first restriction passage 17 and the second restriction passage 18. Therefore, for example, when the resonance frequencies of the first restriction passage 17 and the second restriction passage 18 are equal, high damping performance can be exhibited with respect to vibration of a specific frequency (frequency equivalent to the resonance frequency). . On the other hand, for example, when the resonance frequencies of the first restriction passage 17 and the second restriction passage 18 are made different from each other, the damping performance can be exhibited with respect to vibrations of a wide range of frequencies.

  When the vibration in the radial direction is input to the vibration isolator 10, the two divided liquid chambers 35 are expanded and contracted, and the liquid L is transferred between the two divided liquid chambers 35 and the sub liquid chamber 30. It can be made to travel through each of the two restricted passages 18. Thereby, it is possible to effectively exhibit the damping performance against the vibration in the radial direction.

  Further, the elastic part 33 connects the outer rigid part 31 and the inner rigid part 32. Therefore, for example, when the partition member 16 is assembled to the outer mounting member 11 and the inner mounting member 12, it is possible to facilitate the assembly by deforming the elastic portion 33, and it is possible to improve the assembly performance. . The anti-vibration device 10 includes an inner mounting member 12 to which a pair of elastic bodies 13 and 14 are connected after the partition member 16 is assembled in the outer mounting member 11 to which the diaphragm 15 is connected to form an intermediate structure. Formed by assembling the intermediate structure.

  The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

In the embodiment, one sub liquid chamber 30 is provided, but the present invention is not limited to this. For example, two sub liquid chambers 30 are provided, and one of the two sub liquid chambers 30 and the first liquid chamber 29 communicate with each other through the first restriction passage 17, and the other and the second liquid chamber 34 are second restricted. You may communicate through the channel | path 18.
In the embodiment described above, the second liquid chamber 34 is partitioned into the two divided liquid chambers 35, but may not be partitioned.

  In the embodiment, the elastic portion 33 connects the outer rigid portion 31 and the inner rigid portion 32, but the present invention is not limited to this. For example, the rigid body portion includes only one of the outer rigid body portion 31 and the inner rigid body portion 32, and the elastic portion 33 is directly coupled (vulcanized and bonded) to the outer mounting member 11 or the inner mounting member 12. May be.

  The vibration isolator 10 is not limited to a cabin mount of a vehicle, and can be applied to other than the cabin mount. For example, it can be applied to engine mounts and bushes for vehicles, generator mounts mounted on construction machines, or to machine mounts installed in factories and the like. .

  In addition, it is possible to appropriately replace the constituent elements in the embodiment with known constituent elements without departing from the spirit of the present invention, and the above-described modified examples may be appropriately combined.

DESCRIPTION OF SYMBOLS 10 Vibration isolator 11 Outer attachment member 12 Inner attachment member 13 1st elastic body 14 2nd elastic body 15 Diaphragm 16 Partition member 17 1st restriction path 18 2nd restriction path 28 Liquid chamber 29 First liquid chamber 30 Sub liquid chamber 31 Outer rigid part 32 Inner rigid part 33 Elastic part 34 Second liquid chamber 35 Divided liquid chamber L Liquid O Center axis

Claims (3)

A cylindrical outer mounting member connected to any one of the vibration generating unit and the vibration receiving unit, and an inner mounting member connected to the other and disposed inside the outer mounting member;
A first elastic body connecting the outer mounting member and the inner mounting member;
The outer mounting member and the inner mounting member are connected to each other, and are disposed apart from the first elastic body on one side in the axial direction along the central axis of the outer mounting member, and between the first elastic body and the first elastic body. A diaphragm defining a liquid chamber;
The outer mounting member and the inner mounting member are connected, the liquid chamber is a first liquid chamber having the first elastic body as a part of the partition wall, and a sub liquid chamber having the diaphragm as a part of the partition wall. A partition member that divides into
The outer attachment member and the inner attachment member are connected to each other, and are disposed away from the first elastic body on the other side in the axial direction, and define a second liquid chamber between the first elastic body and the first elastic body. A second elastic body;
A first restriction passage that communicates the first liquid chamber and the sub liquid chamber; and a second restriction passage that communicates the second liquid chamber and the sub liquid chamber;
The partition member elastically connects the outer mounting member and the inner mounting member. The second liquid chamber is divided into two divided liquid chambers around the central axis,
The anti-vibration device according to claim 1, wherein two second restriction passages are provided, and the two divided liquid chambers and the sub liquid chamber communicate with each other.   The partition member includes an annular outer rigid body connected to the outer mounting member, an annular inner rigid body connected to the inner mounting member, and an annular connecting the outer rigid body and the inner rigid body. The vibration isolator according to claim 1, further comprising an elastic portion.

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