WO2019131649A1 - Dispositif d'amortissement de vibration - Google Patents

Dispositif d'amortissement de vibration Download PDF

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Publication number
WO2019131649A1
WO2019131649A1 PCT/JP2018/047606 JP2018047606W WO2019131649A1 WO 2019131649 A1 WO2019131649 A1 WO 2019131649A1 JP 2018047606 W JP2018047606 W JP 2018047606W WO 2019131649 A1 WO2019131649 A1 WO 2019131649A1
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WO
WIPO (PCT)
Prior art keywords
chamber
membrane
liquid
vibration
liquid chamber
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Application number
PCT/JP2018/047606
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English (en)
Japanese (ja)
Inventor
勇樹 佐竹
湧太 馬場
植木　哲
康寿之 長島
Original Assignee
株式会社ブリヂストン
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Publication of WO2019131649A1 publication Critical patent/WO2019131649A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F13/00—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs
    • F16F13/04—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper
    • F16F13/06—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper the damper being a fluid damper, e.g. the plastics spring not forming a part of the wall of the fluid chamber of the damper
    • F16F13/08—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper the damper being a fluid damper, e.g. the plastics spring not forming a part of the wall of the fluid chamber of the damper the plastics spring forming at least a part of the wall of the fluid chamber of the damper
    • F16F13/10—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper the damper being a fluid damper, e.g. the plastics spring not forming a part of the wall of the fluid chamber of the damper the plastics spring forming at least a part of the wall of the fluid chamber of the damper the wall being at least in part formed by a flexible membrane or the like

Definitions

  • the present invention relates to a vibration control device that is applied to, for example, an automobile, an industrial machine, etc., and damps and absorbs the vibration of a vibration generating unit such as an engine.
  • a vibration control device that is applied to, for example, an automobile, an industrial machine, etc., and damps and absorbs the vibration of a vibration generating unit such as an engine.
  • a cylindrical first mounting member connected to one of the vibration generating portion and the vibration receiving portion, a second mounting member connected to the other of the vibration generating portion and the vibration receiving portion, a first mounting member, and a first mounting member 2
  • An elastic body for elastically connecting the mounting member, and a partition member for partitioning the liquid chamber in the first mounting member in which the liquid is sealed into the first liquid chamber and the second liquid chamber, and a partition member
  • a vibration control device in which a restricted passage communicating the first fluid chamber and the second fluid chamber and a storage chamber accommodating the membrane and communicating with the first fluid chamber and the second fluid chamber are formed.
  • the present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a vibration-proof device capable of suppressing generation of a tapping sound while suppressing a spring at the time of input of idle vibration low.
  • a tubular first mounting member connected to one of a vibration generating portion and a vibration receiving portion, and a second mounting member connected to the other of the vibration generating portion and the vibration receiving portion.
  • An elastic body that elastically connects the first mounting member and the second mounting member; and a partition member that divides the liquid chamber in the first mounting member in which the liquid is sealed into the first liquid chamber and the second liquid chamber; And a limiting passage connecting the first liquid chamber and the second liquid chamber in the partition member, and a storage chamber in which the membrane is accommodated and the first liquid chamber and the second liquid chamber communicate with each other.
  • the formed liquid-sealed vibration damping device in which the supporting portion for supporting the outer peripheral edge of the membrane from both sides in the thickness direction is disposed in the storage chamber, and the membrane is directed outward in plan view Of the outer edge of the membrane, at least at the corners of the membrane.
  • the portion continuing from the inner peripheral edge portion, stretchable portion capable Elastic is formed, an anti-vibration device.
  • the vibration damping device 10 includes a cylindrical first attachment member 11 coupled to one of the vibration generating unit and the vibration receiving unit, and a second one coupled to the other of the vibration generating unit and the vibration receiving unit. 2)
  • An elastic body 13 which elastically connects the mounting member 12, the first mounting member 11 and the second mounting member 12 with each other, and a main liquid chamber (a first liquid chamber (the first liquid chamber)
  • a liquid-sealed anti-vibration device including a partition member 16 that divides the space 14 and the auxiliary liquid chamber (second liquid chamber) 15).
  • a direction along the central axis O of the first mounting member 11 is referred to as an axial direction.
  • the second attachment member 12 side along the axial direction is referred to as the upper side
  • the partition member 16 side is referred to as the lower side. That is, the side closer to the second mounting member 12 along the axial direction is referred to as the upper side, and the side closer to the partition member 16 is referred to as the lower side.
  • a direction intersecting the central axis O is referred to as a radial direction
  • a direction circling around the central axis O is referred to as a circumferential direction.
  • the first mounting member 11, the second mounting member 12, and the elastic body 13 are each formed in a circular shape or an annular shape in plan view, and are arranged coaxially with the central axis O.
  • the second mounting member 12 When the anti-vibration device 10 is mounted on, for example, an automobile, the second mounting member 12 is connected to an engine as a vibration generating unit, and the first mounting member 11 is connected to a vehicle body as a vibration receiving unit. Thereby, transmission of engine vibration to the vehicle body is suppressed.
  • the first mounting member 11 may be connected to the vibration generating unit, and the second mounting member 12 may be connected to the vibration receiving unit.
  • the second mounting member 12 is a columnar member extending in the axial direction, and is formed in a hemispherical shape in which a lower end portion bulges downward. In a portion of the second mounting member 12 located above the semispherical lower end, a collar 12 a that protrudes outward in the radial direction is formed.
  • the second mounting member 12 is provided with a screw hole 12b extending downward from the upper end surface thereof. A bolt (not shown) as an attachment on the engine side is screwed into the screw hole 12b.
  • the second mounting member 12 is disposed at the upper end opening of the first mounting member 11 via the elastic body 13.
  • the elastic body 13 is a rubber body and is vulcanized and adhered to the upper end opening of the first mounting member 11 and the outer peripheral surface of the lower portion of the second mounting member 12, respectively, and is interposed between them.
  • the upper end opening of the member 11 is closed from the upper side.
  • a first rubber film 13a that integrally covers the lower surface, the outer peripheral surface, and the upper surface of the collar portion 12a is integrally formed.
  • a second rubber film 13b which covers the inner peripheral surface of the first mounting member 11 in a liquid tight manner is integrally formed.
  • an elastic body made of a material other than rubber, such as a synthetic resin such as a synthetic resin.
  • the first mounting member 11 is formed in a cylindrical shape, and is connected to a vehicle body or the like as a vibration receiving portion via a bracket (not shown).
  • the lower end opening of the first mounting member 11 is closed by the diaphragm 20.
  • the diaphragm 20 is made of an elastic material such as rubber or soft resin, and is formed in a cylindrical shape with a bottom.
  • the outer peripheral surface of the diaphragm 20 is bonded by vulcanization to the inner peripheral surface of the diaphragm ring 21.
  • the diaphragm ring 21 is fitted in the lower end portion of the first mounting member 11 via the second rubber film 13 b.
  • the diaphragm ring 21 is crimped and fixed in the lower end portion of the first mounting member 11 by the lower end portion.
  • Upper end opening edges of the diaphragm 20 and the diaphragm ring 21 are in fluid-tight contact with the lower surface of the partition member 16.
  • the inside of the first attachment member 11 becomes a liquid chamber 19 sealed in a liquid tight manner by the elastic body 13 and the diaphragm 20.
  • the liquid L is sealed (filled) in the liquid chamber 19.
  • the bottom of the diaphragm 20 is deep at the outer peripheral side and shallow at the center.
  • various shapes conventionally known can be adopted other than such a shape.
  • the liquid chamber 19 is divided by the partition member 16 into a main liquid chamber 14 and a sub liquid chamber 15.
  • the main liquid chamber 14 has the lower surface 13 c of the elastic body 13 on a part of the wall surface.
  • the main fluid chamber 14 is a space surrounded by the second rubber film 13 b fluid-tightly covering the elastic body 13 and the inner peripheral surface of the first mounting member 11, and the partition member 16.
  • the internal volume of the main fluid chamber 14 is Changes with the deformation of the elastic body 13.
  • the sub fluid chamber 15 is a space surrounded by the diaphragm 20 and the partition member 16, and the internal volume of the sub fluid chamber 15 changes due to the deformation of the diaphragm 20.
  • the vibration damping device 10 having such a configuration is a compression type device that is attached and used so that the main fluid chamber 14 is located on the upper side in the vertical direction and the secondary fluid chamber 15 is located on the lower side in the vertical direction. .
  • the membrane 41 is formed in a plate shape whose front and back faces face in the axial direction.
  • the partition member 16 is formed with a plurality of first communication holes 42 a communicating the storage chamber 42 and the main liquid chamber 14, and a plurality of second communication holes 42 b communicating the storage chamber 42 and the sub liquid chamber 15. It is done.
  • the number of first communication holes 42 a and the number of second communication holes 42 b are the same.
  • the inner diameter of the first communication hole 42a and the inner diameter of the second communication hole 42b are the same.
  • the flow passage length of the first communication hole 42 a and the flow passage length of the second communication hole 42 b are the same.
  • the shapes and sizes of the plurality of first communication holes 42 a are the same as one another.
  • the shapes and sizes of the plurality of second communication holes 42 b are the same as one another.
  • the plurality of first communication holes 42 a and the plurality of second communication holes 42 b are axially opposed to each other with the membrane 41 and the storage chamber 42 interposed therebetween.
  • supporting portions 43 for supporting the outer peripheral edge portion 41a of the membrane 41 from both sides in the axial direction (thickness direction) are disposed.
  • the outer peripheral edge 41 a of the membrane 41 is a flat surface whose front and back faces face in the axial direction.
  • the support portion 43 is formed on both of the upper wall surface positioned on the upper side and facing downward and the lower wall surface positioned on the lower side and pointing upward among the wall surfaces defining the storage chamber 42.
  • the support portion 43 is formed in a ridge shape extending in the circumferential direction, and supports the outer peripheral edge portion 41 a of the membrane 41 over the entire circumference.
  • the support portion 43 supports the outer peripheral edge portion 41 a of the membrane 41 continuously over the entire circumference.
  • the support portion 43 may abut on the outer peripheral edge portion 41 a of the membrane 41 from both sides in the axial direction, or may approach from the both sides in the axial direction without abutting.
  • locking projections 41c that protrude to both sides in the axial direction are formed.
  • the locking projection 41 c is disposed continuously along the entire outer periphery along the outer peripheral edge 41 a of the membrane 41.
  • the axially outer end portion of the locking projection 41 c is located on the most outer side in the axial direction in the membrane 41.
  • a locking groove 45 is formed where the locking projection 41c of the membrane 41 is locked in a portion connected to the support portion 43 from the outside of the storage chamber 42. It is done.
  • the locking groove 45 is disposed continuously along the entire outer circumference of the support portion 43 along the outer peripheral surface thereof.
  • the locking grooves 45 are formed on both the upper wall surface and the lower wall surface of the accommodation chamber 42, and the locking grooves 45 are opposed to each other in the axial direction.
  • the locking groove 45 is disposed at the outer peripheral edge of the storage chamber 42.
  • the membrane 41 and the storage chamber 42 are formed so as to have the same shape and the same size in plan view seen from the axial direction, as shown in FIG.
  • the membrane 41 is formed with a corner 41 d which is pointed outward in a plan view as viewed from the axial direction
  • the storage chamber 42 is formed with a corner 42 c which is pointed in a plan view.
  • the corner portions 41 d and 42 c are formed in a curved shape protruding outward in a plan view as viewed from the axial direction.
  • the corners 41 d and 42 c are pointed outward with respect to the centers of the membrane 41 and the storage chamber 42 in a plan view as viewed from the axial direction.
  • the membrane 41 and the storage chamber 42 have an inner peripheral edge, an outer peripheral edge surrounding the inner peripheral edge from the outer side in the radial direction, and both ends of the inner peripheral edge and both ends of the outer peripheral edge in plan view seen from the axial direction. It is formed in the shape of a crescent moon provided with corner parts 41d and 42c connected separately.
  • the outer peripheral edges of the membrane 41 and the storage chamber 42 extend in the circumferential direction and are located on the outer peripheral portion of the partition member 16, and the central portions of the inner peripheral edges of the membrane 41 and the storage chamber 42 are the partition member 16 It is located in the center.
  • the plan view shapes of the membrane 41 and the storage chamber 42 may be appropriately changed to, for example, a square shape, a star shape or the like.
  • a stretchable and contractible portion 41b can extend and contract from the inside of the outer peripheral edge 41a. Is formed.
  • the stretchable portion 41 b is bent in the thickness direction of the membrane 41.
  • the expanding and contracting portion 41 b includes a top 41 e that is pointed toward the wall surface that defines the storage chamber 42.
  • One stretchable portion 41 b is formed on the membrane 41 and is bent upward. The top 41 e is pointed toward the upper wall surface of the storage chamber 42.
  • the stretchable part 41 b is disposed continuously along the entire outer periphery along the outer peripheral edge 41 a of the membrane 41.
  • a plurality of extension parts 41b may be connected to the membrane 41 and arranged in a bellows shape.
  • the stretchable portion 41b may be bent downward.
  • the stretchable portion 41b may be disposed only at a portion of the outer peripheral edge portion 41a located at the corner portion 41d in the outer peripheral edge portion 41a, only to a portion continuing from the inside of the outer peripheral edge portion 41a.
  • a plurality of protrusions are provided on the upper and lower surfaces of the main body located inside the stretchable portion 41b.
  • the stretchable portion 41b is formed in a flat plate shape that is thinner than the thickness of the portion of the main body portion of the membrane 41 excluding the plurality of protrusions and extends in a direction orthogonal to the axial direction. May be
  • a relief recess 44 is formed in a portion of the wall surface defining the storage chamber 42 facing the top 41 e of the stretchable portion 41 b.
  • the top 41 e of the stretchable portion 41 b faces the upper wall surface of the storage chamber 42.
  • the relief recesses 44 are formed on both the upper wall surface and the lower wall surface of the accommodation chamber 42, and the relief recesses 44 face each other in the axial direction.
  • the relief recess 44 may be formed only on the upper wall surface of the storage chamber 42.
  • the relief recess 44 is opposed in the axial direction over the entire area in the width direction of the stretchable portion 41 b.
  • the relief recess 44 is formed on the upper wall surface and the lower wall surface of the storage chamber 42 in a portion that is continuous with the support portion 43 from the inside of the storage chamber 42.
  • the relief recess 44 is disposed continuously along the entire inner circumference of the inner circumferential surface of the support portion 43.
  • the groove width of the relief recess 44 is wider than the groove width of the locking groove 45.
  • the depth of the relief recess 44 and the depth of the locking groove 45 are equal to each other.
  • the partition member 16 is provided with a restriction passage 24 communicating the main liquid chamber 14 and the sub liquid chamber 15.
  • the limiting passage 24 has a first communication portion 26 opening to the main liquid chamber 14, a second communication portion 27 opening to the sub liquid chamber 15, and a first communication portion 26 and a second communication. And a main body channel 25 communicating with the portion 27.
  • the main flow passage 25 extends from one of the first communication portion 26 and the second communication portion 27 toward one side in the circumferential direction and a radial direction from an end of the main flow passage 31 in the circumferential direction.
  • a vortex chamber 34 that projects inward of the fluid flow path and forms a swirling flow of the liquid according to the flow velocity of the liquid from one side of the first communication portion 26 and the second communication portion 27.
  • the main flow path 31 extends from the second communication portion 27 toward one side in the circumferential direction.
  • the vortex chamber 34 and the first communication portion 26 are directly connected.
  • the main flow path 31 is formed on the outer peripheral surface of the partition member 16.
  • the main flow passage 31 is disposed in the partition member 16 in an angle range of less than 360 ° centered on the central axis O. In the illustrated example, the main flow passage 31 is disposed in the partition member 16 in an angular range exceeding 180 ° centered on the central axis O.
  • the main flow passage 31 is disposed coaxially with the central axis O, and is disposed coaxially with the lower surface of the annular upper barrier 35 located on the upper side and facing front and back in the axial direction, and located on the lower side
  • the front and back faces are defined by the upper surface of the annular lower barrier 36 facing in the axial direction, and the inner peripheral edges of the upper barrier 35 and the lower barrier 36 respectively, and the groove bottom 37 facing outward in the radial direction There is.
  • the upper barrier 35 faces the main fluid chamber 14.
  • the lower barrier 36 faces the sub fluid chamber 15, and the second communication portion 27 is constituted by one opening which penetrates the lower barrier 36 in the axial direction.
  • the vortex chamber 34 has a circular shape in a plan view as viewed in the axial direction, and the central axis of the vortex chamber 34 extends in the axial direction.
  • the vortex chamber 34 is disposed at a position away from the central axis O.
  • the vortex chamber 34 is disposed in line with the storage chamber 42 in a direction orthogonal to the axial direction, and does not communicate with the storage chamber 42 inside the partition member 16.
  • the internal volume and the planar area of the vortex chamber 34 are smaller than the internal volume and the planar area of the accommodation chamber 42.
  • At least a part of the swirl chamber 34 is located between the two corner portions 41 d of the membrane 41 and between the two corner portions 42 c of the accommodation chamber 42 in a plan view as viewed from the axial direction.
  • a portion of the vortex chamber 34 located inside in the radial direction is, in a plan view as viewed from the axial direction, between the two corners 41 d of the membrane 41 and the two corners of the storage chamber 42. It is located between 42c.
  • the vortex chamber 34 generates a swirling flow of the liquid L in accordance with the flow velocity of the liquid L flowing from the second communication portion 27 toward the first communication portion 26, that is, the liquid L flowing from the other side to the one side in the circumferential direction. Make it happen.
  • the vortex chamber 34 forms a swirling flow of the liquid L in accordance with the flow velocity of the liquid L flowing in from the external communication portion 46 described later. For example, when the flow velocity of the liquid L flowing into the vortex chamber 34 is low, the formation of the swirling flow of the liquid L is suppressed in the vortex chamber 34, but when the flow velocity of the liquid L flowing into the vortex chamber 34 is high, A swirling flow of the liquid L is formed in the vortex chamber 34.
  • the swirling flow swirls around the central axis of the vortex chamber 34.
  • the outer communication portion 46 linearly extends in a plan view as viewed from the axial direction.
  • the outer communication portion 46 extends in the tangential direction of the inner peripheral surface of the vortex chamber 34 in a plan view as viewed from the axial direction.
  • the circumferential size of the outer communication portion 46 is smaller than the inner diameter of the vortex chamber 34.
  • the axial size of the outer communication portion 46 and the axial size of the vortex chamber 34 are equal to each other.
  • the liquid L flowing from the outer communication portion 46 into the vortex chamber 34 circulates through the outer communication portion 46 and is rectified in the tangential direction, and then swirls by flowing along the inner peripheral surface of the vortex chamber 34.
  • the upper wall surface located on the upper side and facing downward is the lower surface of the first barrier 38 facing the main liquid chamber 14, and the lower surface is facing upward
  • the lower wall surface is the upper surface of the second barrier 39 whose lower surface faces the auxiliary liquid chamber 15.
  • the lower surface of the first barrier 38 and the upper surface of the second barrier 39 are flat surfaces extending in a direction orthogonal to the axial direction.
  • the first barrier 38 and the second barrier 39 are in the form of a disc coaxially arranged with the central axis of the vortex chamber 34.
  • the first communication portion 26 includes a plurality of pores 26 a penetrating the first barrier 38 facing the main fluid chamber 14.
  • the pores 26a penetrate the first barrier 38 in the axial direction.
  • the pores 26 a may be formed in the lower barrier 36 facing the sub liquid chamber 15 and may be provided in the second communication portion 27.
  • the pore 26 a includes a first portion 26 b on the main flow path 25 side and a second portion 26 c on the main liquid chamber 14 side. That is, the pore 26 a includes a first portion 26 b close to the main flow path 25 and a second portion 26 c close to the main liquid chamber 14.
  • the flow path length of the first portion 26 b is shorter than the flow path length of the second portion 26 c.
  • the first portion 26 b and the second portion 26 c are gradually reduced in diameter toward the main fluid chamber 14 from the main flow passage 25.
  • the inclination angle of the inner peripheral surface of the first portion 26b with respect to the axial direction is larger than the inclination angle of the inner peripheral surface of the second portion 26c with respect to the axial direction.
  • the first portion 26 b and the second portion 26 c are axially continuous without steps.
  • the inner diameter of the pore 26a is maximum at the opening end on the main flow path 25 side and is minimum at the opening end on the main liquid chamber 14 side. That is, the inner diameter of the pore 26 a is the largest at the open end facing the main flow passage 25 and the smallest at the open end facing the main liquid chamber 14.
  • the flow passage cross-sectional areas of the plurality of pores 26 a are all smaller than the flow passage cross-sectional area of the main flow passage 31.
  • the plurality of pores 26a are disposed inside the vortex chamber 34 in a plan view as viewed in the axial direction.
  • the shape and size of the plurality of pores 26a are the same as one another.
  • the minimum value of the inner diameter of each pore 26a is smaller than the inner diameter of each of the first communication hole 42a and the second communication hole 42b, and the maximum value of the inner diameter of each pore 26a is the first communication hole 42a and the second communication hole 42b. Is larger than each inner diameter of.
  • the average value of the inner diameters of the pores 26a is smaller than the inner diameters of the first communication holes 42a and the second communication holes 42b.
  • the sum of the minimum values of the flow path cross-sectional areas in each of the plurality of pores 26a is smaller than the sum of the flow path cross-sectional areas of the plurality of first communication holes 42a and the flow path cross-sectional areas of the plurality of second communication holes 42b .
  • the flow passage cross-sectional area of the first communication hole 42a and the flow passage cross-sectional area of the second communication hole 42b are equal over the entire length.
  • the sum of the minimum values of the flow passage cross-sectional area in each of the plurality of pores 26 a may be, for example, 1.5 times or more and 4.0 times or less the minimum value of the flow passage cross-sectional area of the main flow passage 31.
  • the flow passage cross-sectional area of the main flow passage 31 is equal over the entire length.
  • the minimum value of the channel cross-sectional area of the plurality of pores 26a may be, for example, 25 mm 2 or less, preferably 0.7 mm 2 or more and 17 mm 2 or less.
  • At least one of the plurality of pores 26a is formed such that the flow path length is three or more times the minimum value of the inner diameter.
  • all of the plurality of pores 26a are formed such that the flow path length is three or more times the minimum value of the inner diameter.
  • the pores 26a formed such that the flow path length is three or more times the minimum value of the inner diameter is a value not less than 2.5 times and not more than 4.5 times the average value of the minimum value of the inner diameter in each of the plurality of pores 26a.
  • the average value of the flow path lengths of the plurality of pores 26a is the minimum of the inner diameter of each of the plurality of pores 26a. The value is three or more times the average value of the values.
  • At least one flow path length of the plurality of pores 26 a is longer than the flow path length of the first communication hole 42 a and the flow path length of the second communication hole 42 b.
  • all of the plurality of pores 26a are formed such that the flow path length is longer than the flow path length of the first communication hole 42a and the flow path length of the second communication hole 42b.
  • the thickness of the first barrier 38 in which the plurality of pores 26 a are formed among the second barrier 39 is larger than the thicknesses of the upper barrier 35, the lower barrier 36, and the second barrier 39.
  • the thickness of the first barrier 38 in which the plurality of pores 26a are located is uniform over the entire area.
  • the upper and lower surfaces of the first barrier 38 form a flat surface extending in a direction orthogonal to the axial direction.
  • the partition member 16 is configured by stacking the upper member 47 and the lower member 48 in the axial direction.
  • the upper member 47 and the lower member 48 are each formed in a plate shape whose front and back surfaces face in the axial direction.
  • the partition member 16 may be integrally formed in its entirety.
  • the outer peripheral surface of the lower member 48 forms a groove bottom surface 37.
  • a second communication hole 42b is formed on the bottom of the first recess.
  • the bottom wall of the second recess forms a second barrier 39.
  • an annular lower barrier 36 which protrudes outward in the radial direction and in which the second communication portion 27 is formed is formed.
  • An outer peripheral edge of the upper member 47 axially opposed to the lower barrier 36 of the lower member 48 forms an upper barrier 35.
  • a first communication hole 42 a is formed in a portion of the upper member 47 that faces the first recess of the lower member 48 in the axial direction.
  • a first communication portion 26 is formed in a portion of the upper member 47 that axially faces the second concave portion of the lower member 48. This portion forms the first barrier 38.
  • the two mounting members 11 and 12 relatively displace while elastically deforming the elastic body 13. Then, the fluid pressure in the main fluid chamber 14 fluctuates, and the liquid L in the main fluid chamber 14 flows into the sub fluid chamber 15 through the limiting passage 24, and the liquid L in the sub fluid chamber 15 is limited in the limiting passage 24. Flows into the main liquid chamber 14 through the
  • the outer peripheral edge portion 41 a of the membrane 41 is supported by the support portion 43 from both sides in the axial direction.
  • the deformation of the membrane 41 is suppressed at the time of vibration input, and it becomes possible to suppress the collision of the membrane 41 with the wall surface of the storage chamber 42, so that it is possible to suppress the generation of striking sound.
  • an expandable and contractible portion 41b is formed at a portion of the outer peripheral edge portion 41a located at least at the corner portion 41d and continuing from the inside of the outer peripheral edge portion 41a.
  • the stretchable portion 41 b is bent in the thickness direction of the membrane 41. Therefore, the amount of expansion and contraction can be reliably ensured while suppressing the decrease in durability. Further, a relief recess 44 is formed in the storage chamber 42. Therefore, when the expansion and contraction part 41b expands and contracts with the input of vibration, it becomes possible to make the top 41e of the expansion and contraction parts 41b easily collide with the wall surface defining the storage chamber 42 enter the relief recess 44.
  • the stretchable portion 41 b can be smoothly stretched and deformed. Further, the stretchable portion 41 b is disposed continuously along the entire outer periphery along the outer peripheral edge portion 41 a of the membrane 41. Therefore, the spring at the time of the input of idle vibration can be suppressed low reliably.
  • the main body flow path 25 includes the vortex chamber 34. Therefore, when a large load (vibration) is input to the vibration damping device 10, when the liquid L flows into the vortex chamber 34 from the second communicating portion 27 side, the flow velocity of the liquid L is sufficiently high, When a swirling flow of the liquid L is formed in the vortex chamber 34, for example, energy loss due to the formation of the swirling flow, energy loss due to friction between the liquid L and the inner surface of the vortex chamber 34, etc. The pressure drop of the liquid L can be increased. Thus, the flow velocity of the liquid L flowing into the main liquid chamber 14 through the first communication portion 26 can be suppressed.
  • the membrane 41 and the storage chamber 42 are formed in a crescent shape in a plan view seen from the axial direction, and a part of the vortex chamber 34 is located between two corner portions 41 d and 42 c of the crescent shape. ing. Therefore, although the storage chamber 42 and the vortex chamber 34 are arranged in the direction orthogonal to the axial direction, a large area can be secured in the plane area of the membrane 41. Therefore, although the outer peripheral edge portion 41a of the membrane 41 is supported by the support portion 43 and the membrane 41 has the corner portion 41d and the membrane 41 is less likely to be deformed, the idle vibration is input when The membrane 41 can be easily deformed smoothly.
  • the first communication portion 26 includes a plurality of pores 26 a penetrating the first barrier 38 facing the main liquid chamber 14. Therefore, when the liquid L flows from the restriction passage 24 into the main liquid chamber 14 through the plurality of pores 26a, the liquid L is subjected to pressure loss by the first barrier 38 in which the pores 26a are formed. Since the fluid flows through the holes 26a, the flow velocity of the liquid L flowing into the main fluid chamber 14 can be suppressed. Moreover, since the liquid L flows through the plurality of pores 26a instead of the single pore 26a, the liquid L can be branched into plural and can be distributed, and the liquid L that has passed through the individual pores 26a can be distributed. The flow rate can be reduced.
  • the vibration damping device comprises a cylindrical first mounting member connected to one of the vibration generating portion and the vibration receiving portion, a second mounting member connected to the other, and both mounting members. And a partition member for partitioning the liquid chamber in the first mounting member in which the liquid is sealed into a first liquid chamber and a second liquid chamber, and the partition member A liquid in which a restricted passage communicating the first liquid chamber and the second liquid chamber, and a storage chamber in which a membrane is accommodated and in communication with the first liquid chamber and the second liquid chamber are formed.
  • a support portion for supporting the outer peripheral edge portion of the membrane from both sides in the thickness direction is disposed in the storage chamber, and the membrane is directed outward in a plan view Sharp corners are formed, and in the membrane, less of the outer periphery Even for a portion located on the corner portion, the portion continuing from the inside of the outer peripheral edge portion, and wherein the expansion and contraction portion capable Elastic is formed.
  • both mounting members are relatively displaced while elastically deforming the elastic body, and the fluid pressure in the first fluid chamber and the second fluid chamber is varied, and the fluid passes through the restricted passage. It tries to circulate between the first fluid chamber and the second fluid chamber.
  • the liquid flows into the restriction passage through one of the first communication portion and the second communication portion, passes through the main body flow path, and then passes through the other of the first communication portion and the second communication portion.
  • the outer peripheral edge of the membrane is supported by the support portion from both sides in the thickness direction, the deformation of the membrane is suppressed at the time of vibration input, and the membrane is prevented from colliding with the wall surface of the storage chamber.
  • an expandable and contractible portion is formed at a portion of the outer peripheral edge located at least at a corner and continuing from the inside of the outer peripheral edge. Therefore, in combination with the fact that the outer peripheral edge of the membrane is supported by the support portion, the stretchable portion at the time of vibration input, although the corner portion of the membrane is particularly difficult to be deformed at the vibration input. By stretching and deforming, the corners of the membrane can be smoothly deformed following the input vibration. As a result, even when idle vibration is input, it is possible to secure the amount of deformation of the membrane, and it is possible to suppress the spring at the time of idle vibration input. As mentioned above, generation
  • the stretchable portion may be bent in the thickness direction of the membrane.
  • the stretchable portion since the stretchable portion is bent in the thickness direction of the membrane, the amount of stretchable deformation can be reliably ensured while suppressing the decrease in durability.
  • the stretchable portion may have a top pointed to a wall surface defining the storage chamber, and a relief recess may be formed in a portion of the wall surface defining the storage chamber facing the top portion.
  • the relief recess is formed in the storage chamber, when the expansion / contraction portion is expanded / contracted in response to the input of vibration, the top portion which easily collides with the wall surface defining the storage chamber among the expansion / contraction portions is the relief recess It is possible to make the stretchable part expand and contract smoothly.
  • the stretchable portion may be disposed continuously along the entire periphery along the outer peripheral edge of the membrane.
  • the expansion and contraction part is continuously arranged along the outer periphery of the membrane over the entire circumference, the spring at the time of the input of the idle vibration can be surely suppressed low.
  • the restriction passage includes a first communication portion opening to the first liquid chamber, a second communication portion opening to the second liquid chamber, and a main body connecting the first communication portion to the second communication portion.
  • a flow path is provided, and the main body flow path extends from any one of the first communication portion and the second communication portion toward one side in the circumferential direction around the central axis of the first attachment member.
  • the main flow channel and one end of the main flow channel in the circumferential direction protrude radially inward, according to the flow velocity of the liquid from one side of the first communication section and the second communication section.
  • a vortex chamber for forming a swirling flow of the liquid wherein the vortex chamber has a circular shape as viewed from the axial direction along the central axis, and is arranged side by side with the storage chamber in the direction orthogonal to the axial direction
  • the membrane and the storage chamber are plan views seen from the axial direction.
  • the membrane and the storage chamber have a crescent shape in a plan view seen from the axial direction, and between the two corners of the crescent shape, At least a portion of the vortex chamber may be located.
  • the main body flow path includes the vortex chamber
  • a large load (vibration) is input to the anti-vibration device, and the vortex chamber receives one of the first communication portion and the second communication portion.
  • the flow velocity of the liquid is sufficiently high and a swirling flow of the liquid is formed in the vortex chamber, for example, energy loss by forming the swirling flow, the liquid and the inner surface of the vortex chamber.
  • the pressure loss of the liquid can be increased due to the energy loss due to the friction between them and the like. Accordingly, it is possible to suppress the flow velocity of the liquid flowing into the first liquid chamber or the second liquid chamber by passing through the other of the first communication portion and the second communication portion.
  • the liquid flowing into the first liquid chamber or the second liquid chamber after passing through the other of the first communication portion and the second communication portion And the liquid in the first liquid chamber or the second liquid chamber can be reduced to a low level, and the generation of vortices due to the flow rate difference and the generation of air bubbles due to the vortices can be suppressed.
  • production of the noise resulting from the cavitation collapse which a bubble collapses can be suppressed.
  • the membrane and the storage chamber have a crescent shape in a plan view seen from the axial direction, and at least a part of the vortex chamber is located between the two corners of the crescent shape, the storage chamber Although the vortex chambers are arranged in a direction perpendicular to the axial direction, a wide planar area of the membrane can be secured. Therefore, despite the fact that the outer peripheral edge of the membrane is supported by the support portion and the membrane has the corner and the membrane is less likely to be deformed, the membrane is deformed smoothly when the idle vibration is input. It can be made easy.
  • the liquid has a plurality of fines.
  • the fluid flows through the respective pores while being pressure-dropped by the barrier in which these pores are formed.
  • the flow velocity of the liquid flowing into the liquid chamber can be suppressed.
  • the liquid flows through a plurality of pores instead of a single pore, it is possible to branch the liquid into a plurality of channels and reduce the flow velocity of the liquid passing through the individual pores. Can.
  • the generation of air bubbles in the first liquid chamber or the second liquid chamber can be reliably suppressed.
  • the generated bubbles can be made to pass through the plurality of pores through the first liquid chamber or the second liquid chamber. It becomes possible to separate in the liquid chamber, and it is possible to suppress the merging and growth of the bubbles and to easily maintain the bubbles in a finely dispersed state.
  • the membrane 41 may be disposed in a state where the front and back surfaces are directed in, for example, the radial direction.
  • both of the first communication portion 26 and the second communication portion 27 may not have the pore 26a, and both of the first communication portion 26 and the second communication portion 27 may have the pore 26a. It may be done.
  • the main flow path 31 is shown that wraps around the partition member 16 about one turn, a main flow path that wraps around the partition member 16 longer than one turn may be adopted.
  • the main flow path 31 may be changed suitably.
  • the main flow path 31 may be, for example, a main flow path extending in the axial direction.
  • the relief recess 44 and the locking groove 45 may not be formed in the storage chamber 42.
  • the main flow path 25 not having the swirl chamber 34 may be adopted.
  • the flow path length of the pore 26a may be less than three times the minimum value of the inner diameter of the pore 26a.
  • the thickness of the first barrier 38 in which the plurality of pores 26 a are formed may be equal to or less than the thickness of each of the upper barrier 35, the lower barrier 36, and the second barrier 39.
  • the flow passage length of the pore 26a may be equal to or less than the flow passage length of each of the first communication hole 42a and the second communication hole 42b.
  • the said embodiment demonstrated the compression type anti-vibration apparatus 10 in which positive pressure acts on the main fluid chamber 14 by supporting load acting, it is not limited to this.
  • the vibration control device of the present invention is mounted, for example, so that the main liquid chamber 14 is located on the lower side in the vertical direction and the auxiliary liquid chamber 15 is located on the upper side in the vertical direction. It may be a suspension type vibration damping device in which a negative pressure acts on the
  • the partition member 16 divides the liquid chamber 19 in the first mounting member 11 into the main liquid chamber 14 having the elastic body 13 in a part of the wall surface and the sub liquid chamber 15.
  • the present invention is not limited to this, and can be appropriately changed to another configuration.
  • a pair of elastic bodies 13 may be provided in the axial direction, and instead of providing the auxiliary liquid chamber 15, a pressure receiving liquid chamber having the elastic body 13 in part of the wall may be provided.
  • the partition member 16 partitions the liquid chamber 19 in the first mounting member 11 in which the liquid L is sealed into the first liquid chamber 14 and the second liquid chamber 15, and the first liquid chamber 14 and the second liquid At least one of the two liquid chambers of the chamber 15 may have the elastic body 13 on a part of the wall surface.
  • the vibration control device 10 is not limited to the engine mount of a vehicle, and may be applied to other than the engine mount.
  • the invention can also be applied to a mount of a generator mounted on a construction machine, or to a mount of a machine installed in a factory or the like.
  • Vibration-proof device 11 First mounting member 12 Second mounting member 13 Elastic body 14 Main liquid chamber (first liquid chamber) 15 Secondary liquid chamber (second liquid chamber) DESCRIPTION OF SYMBOLS 16 Partition member 19 Liquid chamber 24 Restricted passage 25 Body passage 26 First communication portion 26a Pore 27 Second communication portion 31 Main passage 34 Vortex chamber 41 Membrane 41a Outer peripheral portion 41b Stretchable portion 41d Corner portion 41e Top portion 42 Storage chamber 43 Support part 44 Relief recess L Liquid O Central axis

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Combined Devices Of Dampers And Springs (AREA)

Abstract

L'invention concerne un dispositif d'amortissement de vibration rempli de liquide (1), lequel dispositif comporte : un premier élément de montage (11) ; un second élément de montage (12) ; un corps élastique (13) ; et un élément de séparation (16) par lequel une chambre de liquide située à l'intérieur du premier élément de montage (11) et remplie de liquide est divisée en une première chambre de liquide (14) et une seconde chambre de liquide (15), l'élément de séparation (16) ayant, formé à l'intérieur de celui-ci, un passage de limitation (24) et une chambre de maintien (42) pour maintenir une membrane (41). Une section de support (43) pour supporter le bord périphérique externe (41a) de la membrane (41) des deux côtés dans la direction de l'épaisseur est disposée dans la chambre de maintien (42). Un coin aigu (41d) faisant saillie vers l'extérieur en vue en plan est formé sur la membrane (41). Une section extensible et contractile (41b) déformable par extension et contraction est formée à la partie du bord périphérique externe (41a) de la membrane (41), la partie étant située au moins au coin (41d) et se poursuivant à partir du côté interne du bord périphérique externe (41a).
PCT/JP2018/047606 2017-12-26 2018-12-25 Dispositif d'amortissement de vibration WO2019131649A1 (fr)

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JP2017249884A JP7015165B2 (ja) 2017-12-26 2017-12-26 防振装置

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11428290B2 (en) 2017-12-26 2022-08-30 Prospira Corporation Vibration isolating device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7324666B2 (ja) * 2019-09-17 2023-08-10 株式会社プロスパイラ 防振装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010025149A (ja) * 2008-07-15 2010-02-04 Toyota Motor Corp 液体封入式防振装置
JP2010106865A (ja) * 2008-10-28 2010-05-13 Bridgestone Corp 防振装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010025149A (ja) * 2008-07-15 2010-02-04 Toyota Motor Corp 液体封入式防振装置
JP2010106865A (ja) * 2008-10-28 2010-05-13 Bridgestone Corp 防振装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11428290B2 (en) 2017-12-26 2022-08-30 Prospira Corporation Vibration isolating device

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